elf32-nds32.c revision 1.1.1.2
1/* NDS32-specific support for 32-bit ELF. 2 Copyright (C) 2012-2015 Free Software Foundation, Inc. 3 Contributed by Andes Technology Corporation. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 23#include "sysdep.h" 24#include "bfd.h" 25#include "bfd_stdint.h" 26#include "bfdlink.h" 27#include "libbfd.h" 28#include "elf-bfd.h" 29#include "libiberty.h" 30#include "bfd_stdint.h" 31#include "elf/nds32.h" 32#include "opcode/nds32.h" 33#include "elf32-nds32.h" 34#include "opcode/cgen.h" 35#include "../opcodes/nds32-opc.h" 36 37/* Relocation HOWTO functions. */ 38static bfd_reloc_status_type nds32_elf_ignore_reloc 39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 40static bfd_reloc_status_type nds32_elf_9_pcrel_reloc 41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 42static bfd_reloc_status_type nds32_elf_hi20_reloc 43 (bfd *, arelent *, asymbol *, void *, 44 asection *, bfd *, char **); 45static bfd_reloc_status_type nds32_elf_lo12_reloc 46 (bfd *, arelent *, asymbol *, void *, 47 asection *, bfd *, char **); 48static bfd_reloc_status_type nds32_elf_generic_reloc 49 (bfd *, arelent *, asymbol *, void *, 50 asection *, bfd *, char **); 51static bfd_reloc_status_type nds32_elf_sda15_reloc 52 (bfd *, arelent *, asymbol *, void *, 53 asection *, bfd *, char **); 54 55/* Helper functions for HOWTO. */ 56static bfd_reloc_status_type nds32_elf_do_9_pcrel_reloc 57 (bfd *, reloc_howto_type *, asection *, bfd_byte *, bfd_vma, 58 asection *, bfd_vma, bfd_vma); 59static void nds32_elf_relocate_hi20 60 (bfd *, int, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, bfd_vma); 61static reloc_howto_type *bfd_elf32_bfd_reloc_type_table_lookup 62 (enum elf_nds32_reloc_type); 63static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup 64 (bfd *, bfd_reloc_code_real_type); 65 66/* Target hooks. */ 67static void nds32_info_to_howto_rel 68 (bfd *, arelent *, Elf_Internal_Rela *dst); 69static void nds32_info_to_howto 70 (bfd *, arelent *, Elf_Internal_Rela *dst); 71static bfd_boolean nds32_elf_add_symbol_hook 72 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, const char **, 73 flagword *, asection **, bfd_vma *); 74static bfd_boolean nds32_elf_relocate_section 75 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 76 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 77static bfd_boolean nds32_elf_object_p (bfd *); 78static void nds32_elf_final_write_processing (bfd *, bfd_boolean); 79static bfd_boolean nds32_elf_set_private_flags (bfd *, flagword); 80static bfd_boolean nds32_elf_merge_private_bfd_data (bfd *, bfd *); 81static bfd_boolean nds32_elf_print_private_bfd_data (bfd *, void *); 82static bfd_boolean nds32_elf_gc_sweep_hook 83 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 84static bfd_boolean nds32_elf_check_relocs 85 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 86static asection *nds32_elf_gc_mark_hook 87 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 88 struct elf_link_hash_entry *, Elf_Internal_Sym *); 89static bfd_boolean nds32_elf_adjust_dynamic_symbol 90 (struct bfd_link_info *, struct elf_link_hash_entry *); 91static bfd_boolean nds32_elf_size_dynamic_sections 92 (bfd *, struct bfd_link_info *); 93static bfd_boolean nds32_elf_create_dynamic_sections 94 (bfd *, struct bfd_link_info *); 95static bfd_boolean nds32_elf_finish_dynamic_sections 96 (bfd *, struct bfd_link_info *info); 97static bfd_boolean nds32_elf_finish_dynamic_symbol 98 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 99 Elf_Internal_Sym *); 100static bfd_boolean nds32_elf_mkobject (bfd *); 101 102/* Nds32 helper functions. */ 103static bfd_reloc_status_type nds32_elf_final_sda_base 104 (bfd *, struct bfd_link_info *, bfd_vma *, bfd_boolean); 105static bfd_boolean allocate_dynrelocs (struct elf_link_hash_entry *, void *); 106static bfd_boolean readonly_dynrelocs (struct elf_link_hash_entry *, void *); 107static Elf_Internal_Rela *find_relocs_at_address 108 (Elf_Internal_Rela *, Elf_Internal_Rela *, 109 Elf_Internal_Rela *, enum elf_nds32_reloc_type); 110static bfd_vma calculate_memory_address 111 (bfd *, Elf_Internal_Rela *, Elf_Internal_Sym *, Elf_Internal_Shdr *); 112static int nds32_get_section_contents (bfd *, asection *, bfd_byte **); 113static bfd_boolean nds32_elf_ex9_build_hash_table 114 (bfd *, asection *, struct bfd_link_info *); 115static bfd_boolean nds32_elf_ex9_itb_base (struct bfd_link_info *); 116static void nds32_elf_ex9_import_table (struct bfd_link_info *); 117static void nds32_elf_ex9_finish (struct bfd_link_info *); 118static void nds32_elf_ex9_reloc_jmp (struct bfd_link_info *); 119static void nds32_elf_get_insn_with_reg 120 (Elf_Internal_Rela *, uint32_t, uint32_t *); 121static int nds32_get_local_syms (bfd *, asection *ATTRIBUTE_UNUSED, 122 Elf_Internal_Sym **); 123static bfd_boolean nds32_elf_ex9_replace_instruction 124 (struct bfd_link_info *, bfd *, asection *); 125static bfd_boolean nds32_elf_ifc_calc (struct bfd_link_info *, bfd *, 126 asection *); 127static bfd_boolean nds32_elf_ifc_finish (struct bfd_link_info *); 128static bfd_boolean nds32_elf_ifc_replace (struct bfd_link_info *); 129static bfd_boolean nds32_elf_ifc_reloc (void); 130static bfd_boolean nds32_relax_fp_as_gp 131 (struct bfd_link_info *link_info, bfd *abfd, asection *sec, 132 Elf_Internal_Rela *internal_relocs, Elf_Internal_Rela *irelend, 133 Elf_Internal_Sym *isymbuf); 134static bfd_boolean nds32_fag_remove_unused_fpbase 135 (bfd *abfd, asection *sec, Elf_Internal_Rela *internal_relocs, 136 Elf_Internal_Rela *irelend); 137static bfd_byte * 138nds32_elf_get_relocated_section_contents (bfd *abfd, 139 struct bfd_link_info *link_info, 140 struct bfd_link_order *link_order, 141 bfd_byte *data, 142 bfd_boolean relocatable, 143 asymbol **symbols); 144 145enum 146{ 147 MACH_V1 = bfd_mach_n1h, 148 MACH_V2 = bfd_mach_n1h_v2, 149 MACH_V3 = bfd_mach_n1h_v3, 150 MACH_V3M = bfd_mach_n1h_v3m 151}; 152 153#define MIN(a, b) ((a) > (b) ? (b) : (a)) 154#define MAX(a, b) ((a) > (b) ? (a) : (b)) 155 156/* The name of the dynamic interpreter. This is put in the .interp 157 section. */ 158#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 159 160/* The nop opcode we use. */ 161#define NDS32_NOP32 0x40000009 162#define NDS32_NOP16 0x9200 163 164/* The size in bytes of an entry in the procedure linkage table. */ 165#define PLT_ENTRY_SIZE 24 166#define PLT_HEADER_SIZE 24 167 168/* The first entry in a procedure linkage table are reserved, 169 and the initial contents are unimportant (we zero them out). 170 Subsequent entries look like this. */ 171#define PLT0_ENTRY_WORD0 0x46f00000 /* sethi r15, HI20(.got+4) */ 172#define PLT0_ENTRY_WORD1 0x58f78000 /* ori r15, r25, LO12(.got+4) */ 173#define PLT0_ENTRY_WORD2 0x05178000 /* lwi r17, [r15+0] */ 174#define PLT0_ENTRY_WORD3 0x04f78001 /* lwi r15, [r15+4] */ 175#define PLT0_ENTRY_WORD4 0x4a003c00 /* jr r15 */ 176 177/* $ta is change to $r15 (from $r25). */ 178#define PLT0_PIC_ENTRY_WORD0 0x46f00000 /* sethi r15, HI20(got[1]@GOT) */ 179#define PLT0_PIC_ENTRY_WORD1 0x58f78000 /* ori r15, r15, LO12(got[1]@GOT) */ 180#define PLT0_PIC_ENTRY_WORD2 0x40f7f400 /* add r15, gp, r15 */ 181#define PLT0_PIC_ENTRY_WORD3 0x05178000 /* lwi r17, [r15+0] */ 182#define PLT0_PIC_ENTRY_WORD4 0x04f78001 /* lwi r15, [r15+4] */ 183#define PLT0_PIC_ENTRY_WORD5 0x4a003c00 /* jr r15 */ 184 185#define PLT_ENTRY_WORD0 0x46f00000 /* sethi r15, HI20(&got[n+3]) */ 186#define PLT_ENTRY_WORD1 0x04f78000 /* lwi r15, r15, LO12(&got[n+3]) */ 187#define PLT_ENTRY_WORD2 0x4a003c00 /* jr r15 */ 188#define PLT_ENTRY_WORD3 0x45000000 /* movi r16, sizeof(RELA) * n */ 189#define PLT_ENTRY_WORD4 0x48000000 /* j .plt0. */ 190 191#define PLT_PIC_ENTRY_WORD0 0x46f00000 /* sethi r15, HI20(got[n+3]@GOT) */ 192#define PLT_PIC_ENTRY_WORD1 0x58f78000 /* ori r15, r15, LO12(got[n+3]@GOT) */ 193#define PLT_PIC_ENTRY_WORD2 0x38febc02 /* lw r15, [gp+r15] */ 194#define PLT_PIC_ENTRY_WORD3 0x4a003c00 /* jr r15 */ 195#define PLT_PIC_ENTRY_WORD4 0x45000000 /* movi r16, sizeof(RELA) * n */ 196#define PLT_PIC_ENTRY_WORD5 0x48000000 /* j .plt0 */ 197 198/* These are macros used to get the relocation accurate value. */ 199#define ACCURATE_8BIT_S1 (0x100) 200#define ACCURATE_U9BIT_S1 (0x400) 201#define ACCURATE_12BIT_S1 (0x2000) 202#define ACCURATE_14BIT_S1 (0x4000) 203#define ACCURATE_19BIT (0x40000) 204 205/* These are macros used to get the relocation conservative value. */ 206#define CONSERVATIVE_8BIT_S1 (0x100 - 4) 207#define CONSERVATIVE_14BIT_S1 (0x4000 - 4) 208#define CONSERVATIVE_16BIT_S1 (0x10000 - 4) 209#define CONSERVATIVE_24BIT_S1 (0x1000000 - 4) 210/* These must be more conservative because the address may be in 211 different segment. */ 212#define CONSERVATIVE_15BIT (0x4000 - 0x1000) 213#define CONSERVATIVE_15BIT_S1 (0x8000 - 0x1000) 214#define CONSERVATIVE_15BIT_S2 (0x10000 - 0x1000) 215#define CONSERVATIVE_19BIT (0x40000 - 0x1000) 216#define CONSERVATIVE_20BIT (0x80000 - 0x1000) 217 218/* Size of small data/bss sections, used to calculate SDA_BASE. */ 219static long got_size = 0; 220static int is_SDA_BASE_set = 0; 221static int is_ITB_BASE_set = 0; 222 223/* Convert ELF-VER in eflags to string for debugging purpose. */ 224static const char *const nds32_elfver_strtab[] = 225{ 226 "ELF-1.2", 227 "ELF-1.3", 228 "ELF-1.4", 229}; 230 231/* The nds32 linker needs to keep track of the number of relocs that it 232 decides to copy in check_relocs for each symbol. This is so that 233 it can discard PC relative relocs if it doesn't need them when 234 linking with -Bsymbolic. We store the information in a field 235 extending the regular ELF linker hash table. */ 236 237/* This structure keeps track of the number of PC relative relocs we 238 have copied for a given symbol. */ 239 240struct elf_nds32_pcrel_relocs_copied 241{ 242 /* Next section. */ 243 struct elf_nds32_pcrel_relocs_copied *next; 244 /* A section in dynobj. */ 245 asection *section; 246 /* Number of relocs copied in this section. */ 247 bfd_size_type count; 248}; 249 250/* The sh linker needs to keep track of the number of relocs that it 251 decides to copy as dynamic relocs in check_relocs for each symbol. 252 This is so that it can later discard them if they are found to be 253 unnecessary. We store the information in a field extending the 254 regular ELF linker hash table. */ 255 256struct elf_nds32_dyn_relocs 257{ 258 struct elf_nds32_dyn_relocs *next; 259 260 /* The input section of the reloc. */ 261 asection *sec; 262 263 /* Total number of relocs copied for the input section. */ 264 bfd_size_type count; 265 266 /* Number of pc-relative relocs copied for the input section. */ 267 bfd_size_type pc_count; 268}; 269 270/* Nds32 ELF linker hash entry. */ 271 272struct elf_nds32_link_hash_entry 273{ 274 struct elf_link_hash_entry root; 275 276 /* Track dynamic relocs copied for this symbol. */ 277 struct elf_nds32_dyn_relocs *dyn_relocs; 278 279 /* For checking relocation type. */ 280#define GOT_UNKNOWN 0 281#define GOT_NORMAL 1 282#define GOT_TLS_IE 2 283 unsigned int tls_type; 284}; 285 286/* Get the nds32 ELF linker hash table from a link_info structure. */ 287 288#define FP_BASE_NAME "_FP_BASE_" 289static int check_start_export_sym = 0; 290static size_t ex9_relax_size = 0; /* Save ex9 predicted reducing size. */ 291 292/* The offset for executable tls relaxation. */ 293#define TP_OFFSET 0x0 294 295struct elf_nds32_obj_tdata 296{ 297 struct elf_obj_tdata root; 298 299 /* tls_type for each local got entry. */ 300 char *local_got_tls_type; 301}; 302 303#define elf_nds32_tdata(bfd) \ 304 ((struct elf_nds32_obj_tdata *) (bfd)->tdata.any) 305 306#define elf32_nds32_local_got_tls_type(bfd) \ 307 (elf_nds32_tdata (bfd)->local_got_tls_type) 308 309#define elf32_nds32_hash_entry(ent) ((struct elf_nds32_link_hash_entry *)(ent)) 310 311static bfd_boolean 312nds32_elf_mkobject (bfd *abfd) 313{ 314 return bfd_elf_allocate_object (abfd, sizeof (struct elf_nds32_obj_tdata), 315 NDS32_ELF_DATA); 316} 317 318/* Relocations used for relocation. */ 319static reloc_howto_type nds32_elf_howto_table[] = 320{ 321 /* This reloc does nothing. */ 322 HOWTO (R_NDS32_NONE, /* type */ 323 0, /* rightshift */ 324 2, /* size (0 = byte, 1 = short, 2 = long) */ 325 32, /* bitsize */ 326 FALSE, /* pc_relative */ 327 0, /* bitpos */ 328 complain_overflow_bitfield, /* complain_on_overflow */ 329 bfd_elf_generic_reloc, /* special_function */ 330 "R_NDS32_NONE", /* name */ 331 FALSE, /* partial_inplace */ 332 0, /* src_mask */ 333 0, /* dst_mask */ 334 FALSE), /* pcrel_offset */ 335 336 /* A 16 bit absolute relocation. */ 337 HOWTO (R_NDS32_16, /* type */ 338 0, /* rightshift */ 339 1, /* size (0 = byte, 1 = short, 2 = long) */ 340 16, /* bitsize */ 341 FALSE, /* pc_relative */ 342 0, /* bitpos */ 343 complain_overflow_bitfield, /* complain_on_overflow */ 344 nds32_elf_generic_reloc, /* special_function */ 345 "R_NDS32_16", /* name */ 346 FALSE, /* partial_inplace */ 347 0xffff, /* src_mask */ 348 0xffff, /* dst_mask */ 349 FALSE), /* pcrel_offset */ 350 351 /* A 32 bit absolute relocation. */ 352 HOWTO (R_NDS32_32, /* type */ 353 0, /* rightshift */ 354 2, /* size (0 = byte, 1 = short, 2 = long) */ 355 32, /* bitsize */ 356 FALSE, /* pc_relative */ 357 0, /* bitpos */ 358 complain_overflow_bitfield, /* complain_on_overflow */ 359 nds32_elf_generic_reloc, /* special_function */ 360 "R_NDS32_32", /* name */ 361 FALSE, /* partial_inplace */ 362 0xffffffff, /* src_mask */ 363 0xffffffff, /* dst_mask */ 364 FALSE), /* pcrel_offset */ 365 366 /* A 20 bit address. */ 367 HOWTO (R_NDS32_20, /* type */ 368 0, /* rightshift */ 369 2, /* size (0 = byte, 1 = short, 2 = long) */ 370 20, /* bitsize */ 371 FALSE, /* pc_relative */ 372 0, /* bitpos */ 373 complain_overflow_unsigned, /* complain_on_overflow */ 374 nds32_elf_generic_reloc, /* special_function */ 375 "R_NDS32_20", /* name */ 376 FALSE, /* partial_inplace */ 377 0xfffff, /* src_mask */ 378 0xfffff, /* dst_mask */ 379 FALSE), /* pcrel_offset */ 380 381 /* An PC Relative 9-bit relocation, shifted by 2. 382 This reloc is complicated because relocations are relative to pc & -4. 383 i.e. branches in the right insn slot use the address of the left insn 384 slot for pc. */ 385 /* ??? It's not clear whether this should have partial_inplace set or not. 386 Branch relaxing in the assembler can store the addend in the insn, 387 and if bfd_install_relocation gets called the addend may get added 388 again. */ 389 HOWTO (R_NDS32_9_PCREL, /* type */ 390 1, /* rightshift */ 391 1, /* size (0 = byte, 1 = short, 2 = long) */ 392 8, /* bitsize */ 393 TRUE, /* pc_relative */ 394 0, /* bitpos */ 395 complain_overflow_signed, /* complain_on_overflow */ 396 nds32_elf_9_pcrel_reloc, /* special_function */ 397 "R_NDS32_9_PCREL", /* name */ 398 FALSE, /* partial_inplace */ 399 0xff, /* src_mask */ 400 0xff, /* dst_mask */ 401 TRUE), /* pcrel_offset */ 402 403 /* A relative 15 bit relocation, right shifted by 1. */ 404 HOWTO (R_NDS32_15_PCREL, /* type */ 405 1, /* rightshift */ 406 2, /* size (0 = byte, 1 = short, 2 = long) */ 407 14, /* bitsize */ 408 TRUE, /* pc_relative */ 409 0, /* bitpos */ 410 complain_overflow_signed, /* complain_on_overflow */ 411 bfd_elf_generic_reloc, /* special_function */ 412 "R_NDS32_15_PCREL", /* name */ 413 FALSE, /* partial_inplace */ 414 0x3fff, /* src_mask */ 415 0x3fff, /* dst_mask */ 416 TRUE), /* pcrel_offset */ 417 418 /* A relative 17 bit relocation, right shifted by 1. */ 419 HOWTO (R_NDS32_17_PCREL, /* type */ 420 1, /* rightshift */ 421 2, /* size (0 = byte, 1 = short, 2 = long) */ 422 16, /* bitsize */ 423 TRUE, /* pc_relative */ 424 0, /* bitpos */ 425 complain_overflow_signed, /* complain_on_overflow */ 426 bfd_elf_generic_reloc, /* special_function */ 427 "R_NDS32_17_PCREL", /* name */ 428 FALSE, /* partial_inplace */ 429 0xffff, /* src_mask */ 430 0xffff, /* dst_mask */ 431 TRUE), /* pcrel_offset */ 432 433 /* A relative 25 bit relocation, right shifted by 1. */ 434 /* ??? It's not clear whether this should have partial_inplace set or not. 435 Branch relaxing in the assembler can store the addend in the insn, 436 and if bfd_install_relocation gets called the addend may get added 437 again. */ 438 HOWTO (R_NDS32_25_PCREL, /* type */ 439 1, /* rightshift */ 440 2, /* size (0 = byte, 1 = short, 2 = long) */ 441 24, /* bitsize */ 442 TRUE, /* pc_relative */ 443 0, /* bitpos */ 444 complain_overflow_signed, /* complain_on_overflow */ 445 bfd_elf_generic_reloc, /* special_function */ 446 "R_NDS32_25_PCREL", /* name */ 447 FALSE, /* partial_inplace */ 448 0xffffff, /* src_mask */ 449 0xffffff, /* dst_mask */ 450 TRUE), /* pcrel_offset */ 451 452 /* High 20 bits of address when lower 12 is or'd in. */ 453 HOWTO (R_NDS32_HI20, /* type */ 454 12, /* rightshift */ 455 2, /* size (0 = byte, 1 = short, 2 = long) */ 456 20, /* bitsize */ 457 FALSE, /* pc_relative */ 458 0, /* bitpos */ 459 complain_overflow_dont,/* complain_on_overflow */ 460 nds32_elf_hi20_reloc, /* special_function */ 461 "R_NDS32_HI20", /* name */ 462 FALSE, /* partial_inplace */ 463 0x000fffff, /* src_mask */ 464 0x000fffff, /* dst_mask */ 465 FALSE), /* pcrel_offset */ 466 467 /* Lower 12 bits of address. */ 468 HOWTO (R_NDS32_LO12S3, /* type */ 469 3, /* rightshift */ 470 2, /* size (0 = byte, 1 = short, 2 = long) */ 471 9, /* bitsize */ 472 FALSE, /* pc_relative */ 473 0, /* bitpos */ 474 complain_overflow_dont,/* complain_on_overflow */ 475 nds32_elf_lo12_reloc, /* special_function */ 476 "R_NDS32_LO12S3", /* name */ 477 FALSE, /* partial_inplace */ 478 0x000001ff, /* src_mask */ 479 0x000001ff, /* dst_mask */ 480 FALSE), /* pcrel_offset */ 481 482 /* Lower 12 bits of address. */ 483 HOWTO (R_NDS32_LO12S2, /* type */ 484 2, /* rightshift */ 485 2, /* size (0 = byte, 1 = short, 2 = long) */ 486 10, /* bitsize */ 487 FALSE, /* pc_relative */ 488 0, /* bitpos */ 489 complain_overflow_dont,/* complain_on_overflow */ 490 nds32_elf_lo12_reloc, /* special_function */ 491 "R_NDS32_LO12S2", /* name */ 492 FALSE, /* partial_inplace */ 493 0x000003ff, /* src_mask */ 494 0x000003ff, /* dst_mask */ 495 FALSE), /* pcrel_offset */ 496 497 /* Lower 12 bits of address. */ 498 HOWTO (R_NDS32_LO12S1, /* type */ 499 1, /* rightshift */ 500 2, /* size (0 = byte, 1 = short, 2 = long) */ 501 11, /* bitsize */ 502 FALSE, /* pc_relative */ 503 0, /* bitpos */ 504 complain_overflow_dont,/* complain_on_overflow */ 505 nds32_elf_lo12_reloc, /* special_function */ 506 "R_NDS32_LO12S1", /* name */ 507 FALSE, /* partial_inplace */ 508 0x000007ff, /* src_mask */ 509 0x000007ff, /* dst_mask */ 510 FALSE), /* pcrel_offset */ 511 512 /* Lower 12 bits of address. */ 513 HOWTO (R_NDS32_LO12S0, /* type */ 514 0, /* rightshift */ 515 2, /* size (0 = byte, 1 = short, 2 = long) */ 516 12, /* bitsize */ 517 FALSE, /* pc_relative */ 518 0, /* bitpos */ 519 complain_overflow_dont,/* complain_on_overflow */ 520 nds32_elf_lo12_reloc, /* special_function */ 521 "R_NDS32_LO12S0", /* name */ 522 FALSE, /* partial_inplace */ 523 0x00000fff, /* src_mask */ 524 0x00000fff, /* dst_mask */ 525 FALSE), /* pcrel_offset */ 526 527 /* Small data area 15 bits offset. */ 528 HOWTO (R_NDS32_SDA15S3, /* type */ 529 3, /* rightshift */ 530 2, /* size (0 = byte, 1 = short, 2 = long) */ 531 15, /* bitsize */ 532 FALSE, /* pc_relative */ 533 0, /* bitpos */ 534 complain_overflow_signed, /* complain_on_overflow */ 535 nds32_elf_sda15_reloc, /* special_function */ 536 "R_NDS32_SDA15S3", /* name */ 537 FALSE, /* partial_inplace */ 538 0x00007fff, /* src_mask */ 539 0x00007fff, /* dst_mask */ 540 FALSE), /* pcrel_offset */ 541 542 /* Small data area 15 bits offset. */ 543 HOWTO (R_NDS32_SDA15S2, /* type */ 544 2, /* rightshift */ 545 2, /* size (0 = byte, 1 = short, 2 = long) */ 546 15, /* bitsize */ 547 FALSE, /* pc_relative */ 548 0, /* bitpos */ 549 complain_overflow_signed, /* complain_on_overflow */ 550 nds32_elf_sda15_reloc, /* special_function */ 551 "R_NDS32_SDA15S2", /* name */ 552 FALSE, /* partial_inplace */ 553 0x00007fff, /* src_mask */ 554 0x00007fff, /* dst_mask */ 555 FALSE), /* pcrel_offset */ 556 557 /* Small data area 15 bits offset. */ 558 HOWTO (R_NDS32_SDA15S1, /* type */ 559 1, /* rightshift */ 560 2, /* size (0 = byte, 1 = short, 2 = long) */ 561 15, /* bitsize */ 562 FALSE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_signed, /* complain_on_overflow */ 565 nds32_elf_sda15_reloc, /* special_function */ 566 "R_NDS32_SDA15S1", /* name */ 567 FALSE, /* partial_inplace */ 568 0x00007fff, /* src_mask */ 569 0x00007fff, /* dst_mask */ 570 FALSE), /* pcrel_offset */ 571 572 /* Small data area 15 bits offset. */ 573 HOWTO (R_NDS32_SDA15S0, /* type */ 574 0, /* rightshift */ 575 2, /* size (0 = byte, 1 = short, 2 = long) */ 576 15, /* bitsize */ 577 FALSE, /* pc_relative */ 578 0, /* bitpos */ 579 complain_overflow_signed, /* complain_on_overflow */ 580 nds32_elf_sda15_reloc, /* special_function */ 581 "R_NDS32_SDA15S0", /* name */ 582 FALSE, /* partial_inplace */ 583 0x00007fff, /* src_mask */ 584 0x00007fff, /* dst_mask */ 585 FALSE), /* pcrel_offset */ 586 587 /* GNU extension to record C++ vtable hierarchy */ 588 HOWTO (R_NDS32_GNU_VTINHERIT, /* type */ 589 0, /* rightshift */ 590 2, /* size (0 = byte, 1 = short, 2 = long) */ 591 0, /* bitsize */ 592 FALSE, /* pc_relative */ 593 0, /* bitpos */ 594 complain_overflow_dont,/* complain_on_overflow */ 595 NULL, /* special_function */ 596 "R_NDS32_GNU_VTINHERIT", /* name */ 597 FALSE, /* partial_inplace */ 598 0, /* src_mask */ 599 0, /* dst_mask */ 600 FALSE), /* pcrel_offset */ 601 602 /* GNU extension to record C++ vtable member usage */ 603 HOWTO (R_NDS32_GNU_VTENTRY, /* type */ 604 0, /* rightshift */ 605 2, /* size (0 = byte, 1 = short, 2 = long) */ 606 0, /* bitsize */ 607 FALSE, /* pc_relative */ 608 0, /* bitpos */ 609 complain_overflow_dont,/* complain_on_overflow */ 610 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 611 "R_NDS32_GNU_VTENTRY", /* name */ 612 FALSE, /* partial_inplace */ 613 0, /* src_mask */ 614 0, /* dst_mask */ 615 FALSE), /* pcrel_offset */ 616 617 /* A 16 bit absolute relocation. */ 618 HOWTO (R_NDS32_16_RELA, /* type */ 619 0, /* rightshift */ 620 1, /* size (0 = byte, 1 = short, 2 = long) */ 621 16, /* bitsize */ 622 FALSE, /* pc_relative */ 623 0, /* bitpos */ 624 complain_overflow_bitfield, /* complain_on_overflow */ 625 bfd_elf_generic_reloc, /* special_function */ 626 "R_NDS32_16_RELA", /* name */ 627 FALSE, /* partial_inplace */ 628 0xffff, /* src_mask */ 629 0xffff, /* dst_mask */ 630 FALSE), /* pcrel_offset */ 631 632 /* A 32 bit absolute relocation. */ 633 HOWTO (R_NDS32_32_RELA, /* type */ 634 0, /* rightshift */ 635 2, /* size (0 = byte, 1 = short, 2 = long) */ 636 32, /* bitsize */ 637 FALSE, /* pc_relative */ 638 0, /* bitpos */ 639 complain_overflow_bitfield, /* complain_on_overflow */ 640 bfd_elf_generic_reloc, /* special_function */ 641 "R_NDS32_32_RELA", /* name */ 642 FALSE, /* partial_inplace */ 643 0xffffffff, /* src_mask */ 644 0xffffffff, /* dst_mask */ 645 FALSE), /* pcrel_offset */ 646 647 /* A 20 bit address. */ 648 HOWTO (R_NDS32_20_RELA, /* type */ 649 0, /* rightshift */ 650 2, /* size (0 = byte, 1 = short, 2 = long) */ 651 20, /* bitsize */ 652 FALSE, /* pc_relative */ 653 0, /* bitpos */ 654 complain_overflow_signed, /* complain_on_overflow */ 655 bfd_elf_generic_reloc, /* special_function */ 656 "R_NDS32_20_RELA", /* name */ 657 FALSE, /* partial_inplace */ 658 0xfffff, /* src_mask */ 659 0xfffff, /* dst_mask */ 660 FALSE), /* pcrel_offset */ 661 662 HOWTO (R_NDS32_9_PCREL_RELA, /* type */ 663 1, /* rightshift */ 664 1, /* size (0 = byte, 1 = short, 2 = long) */ 665 8, /* bitsize */ 666 TRUE, /* pc_relative */ 667 0, /* bitpos */ 668 complain_overflow_signed, /* complain_on_overflow */ 669 bfd_elf_generic_reloc, /* special_function */ 670 "R_NDS32_9_PCREL_RELA",/* name */ 671 FALSE, /* partial_inplace */ 672 0xff, /* src_mask */ 673 0xff, /* dst_mask */ 674 TRUE), /* pcrel_offset */ 675 676 /* A relative 15 bit relocation, right shifted by 1. */ 677 HOWTO (R_NDS32_15_PCREL_RELA, /* type */ 678 1, /* rightshift */ 679 2, /* size (0 = byte, 1 = short, 2 = long) */ 680 14, /* bitsize */ 681 TRUE, /* pc_relative */ 682 0, /* bitpos */ 683 complain_overflow_signed, /* complain_on_overflow */ 684 bfd_elf_generic_reloc, /* special_function */ 685 "R_NDS32_15_PCREL_RELA", /* name */ 686 FALSE, /* partial_inplace */ 687 0x3fff, /* src_mask */ 688 0x3fff, /* dst_mask */ 689 TRUE), /* pcrel_offset */ 690 691 /* A relative 17 bit relocation, right shifted by 1. */ 692 HOWTO (R_NDS32_17_PCREL_RELA, /* type */ 693 1, /* rightshift */ 694 2, /* size (0 = byte, 1 = short, 2 = long) */ 695 16, /* bitsize */ 696 TRUE, /* pc_relative */ 697 0, /* bitpos */ 698 complain_overflow_signed, /* complain_on_overflow */ 699 bfd_elf_generic_reloc, /* special_function */ 700 "R_NDS32_17_PCREL_RELA", /* name */ 701 FALSE, /* partial_inplace */ 702 0xffff, /* src_mask */ 703 0xffff, /* dst_mask */ 704 TRUE), /* pcrel_offset */ 705 706 /* A relative 25 bit relocation, right shifted by 2. */ 707 HOWTO (R_NDS32_25_PCREL_RELA, /* type */ 708 1, /* rightshift */ 709 2, /* size (0 = byte, 1 = short, 2 = long) */ 710 24, /* bitsize */ 711 TRUE, /* pc_relative */ 712 0, /* bitpos */ 713 complain_overflow_signed, /* complain_on_overflow */ 714 bfd_elf_generic_reloc, /* special_function */ 715 "R_NDS32_25_PCREL_RELA", /* name */ 716 FALSE, /* partial_inplace */ 717 0xffffff, /* src_mask */ 718 0xffffff, /* dst_mask */ 719 TRUE), /* pcrel_offset */ 720 721 /* High 20 bits of address when lower 16 is or'd in. */ 722 HOWTO (R_NDS32_HI20_RELA, /* type */ 723 12, /* rightshift */ 724 2, /* size (0 = byte, 1 = short, 2 = long) */ 725 20, /* bitsize */ 726 FALSE, /* pc_relative */ 727 0, /* bitpos */ 728 complain_overflow_dont,/* complain_on_overflow */ 729 bfd_elf_generic_reloc, /* special_function */ 730 "R_NDS32_HI20_RELA", /* name */ 731 FALSE, /* partial_inplace */ 732 0x000fffff, /* src_mask */ 733 0x000fffff, /* dst_mask */ 734 FALSE), /* pcrel_offset */ 735 736 /* Lower 12 bits of address. */ 737 HOWTO (R_NDS32_LO12S3_RELA, /* type */ 738 3, /* rightshift */ 739 2, /* size (0 = byte, 1 = short, 2 = long) */ 740 9, /* bitsize */ 741 FALSE, /* pc_relative */ 742 0, /* bitpos */ 743 complain_overflow_dont,/* complain_on_overflow */ 744 bfd_elf_generic_reloc, /* special_function */ 745 "R_NDS32_LO12S3_RELA", /* name */ 746 FALSE, /* partial_inplace */ 747 0x000001ff, /* src_mask */ 748 0x000001ff, /* dst_mask */ 749 FALSE), /* pcrel_offset */ 750 751 /* Lower 12 bits of address. */ 752 HOWTO (R_NDS32_LO12S2_RELA, /* type */ 753 2, /* rightshift */ 754 2, /* size (0 = byte, 1 = short, 2 = long) */ 755 10, /* bitsize */ 756 FALSE, /* pc_relative */ 757 0, /* bitpos */ 758 complain_overflow_dont,/* complain_on_overflow */ 759 bfd_elf_generic_reloc, /* special_function */ 760 "R_NDS32_LO12S2_RELA", /* name */ 761 FALSE, /* partial_inplace */ 762 0x000003ff, /* src_mask */ 763 0x000003ff, /* dst_mask */ 764 FALSE), /* pcrel_offset */ 765 766 /* Lower 12 bits of address. */ 767 HOWTO (R_NDS32_LO12S1_RELA, /* type */ 768 1, /* rightshift */ 769 2, /* size (0 = byte, 1 = short, 2 = long) */ 770 11, /* bitsize */ 771 FALSE, /* pc_relative */ 772 0, /* bitpos */ 773 complain_overflow_dont,/* complain_on_overflow */ 774 bfd_elf_generic_reloc, /* special_function */ 775 "R_NDS32_LO12S1_RELA", /* name */ 776 FALSE, /* partial_inplace */ 777 0x000007ff, /* src_mask */ 778 0x000007ff, /* dst_mask */ 779 FALSE), /* pcrel_offset */ 780 781 /* Lower 12 bits of address. */ 782 HOWTO (R_NDS32_LO12S0_RELA, /* type */ 783 0, /* rightshift */ 784 2, /* size (0 = byte, 1 = short, 2 = long) */ 785 12, /* bitsize */ 786 FALSE, /* pc_relative */ 787 0, /* bitpos */ 788 complain_overflow_dont,/* complain_on_overflow */ 789 bfd_elf_generic_reloc, /* special_function */ 790 "R_NDS32_LO12S0_RELA", /* name */ 791 FALSE, /* partial_inplace */ 792 0x00000fff, /* src_mask */ 793 0x00000fff, /* dst_mask */ 794 FALSE), /* pcrel_offset */ 795 796 /* Small data area 15 bits offset. */ 797 HOWTO (R_NDS32_SDA15S3_RELA, /* type */ 798 3, /* rightshift */ 799 2, /* size (0 = byte, 1 = short, 2 = long) */ 800 15, /* bitsize */ 801 FALSE, /* pc_relative */ 802 0, /* bitpos */ 803 complain_overflow_signed, /* complain_on_overflow */ 804 bfd_elf_generic_reloc, /* special_function */ 805 "R_NDS32_SDA15S3_RELA",/* name */ 806 FALSE, /* partial_inplace */ 807 0x00007fff, /* src_mask */ 808 0x00007fff, /* dst_mask */ 809 FALSE), /* pcrel_offset */ 810 811 /* Small data area 15 bits offset. */ 812 HOWTO (R_NDS32_SDA15S2_RELA, /* type */ 813 2, /* rightshift */ 814 2, /* size (0 = byte, 1 = short, 2 = long) */ 815 15, /* bitsize */ 816 FALSE, /* pc_relative */ 817 0, /* bitpos */ 818 complain_overflow_signed, /* complain_on_overflow */ 819 bfd_elf_generic_reloc, /* special_function */ 820 "R_NDS32_SDA15S2_RELA",/* name */ 821 FALSE, /* partial_inplace */ 822 0x00007fff, /* src_mask */ 823 0x00007fff, /* dst_mask */ 824 FALSE), /* pcrel_offset */ 825 826 HOWTO (R_NDS32_SDA15S1_RELA, /* type */ 827 1, /* rightshift */ 828 2, /* size (0 = byte, 1 = short, 2 = long) */ 829 15, /* bitsize */ 830 FALSE, /* pc_relative */ 831 0, /* bitpos */ 832 complain_overflow_signed, /* complain_on_overflow */ 833 bfd_elf_generic_reloc, /* special_function */ 834 "R_NDS32_SDA15S1_RELA",/* name */ 835 FALSE, /* partial_inplace */ 836 0x00007fff, /* src_mask */ 837 0x00007fff, /* dst_mask */ 838 FALSE), /* pcrel_offset */ 839 840 HOWTO (R_NDS32_SDA15S0_RELA, /* type */ 841 0, /* rightshift */ 842 2, /* size (0 = byte, 1 = short, 2 = long) */ 843 15, /* bitsize */ 844 FALSE, /* pc_relative */ 845 0, /* bitpos */ 846 complain_overflow_signed, /* complain_on_overflow */ 847 bfd_elf_generic_reloc, /* special_function */ 848 "R_NDS32_SDA15S0_RELA",/* name */ 849 FALSE, /* partial_inplace */ 850 0x00007fff, /* src_mask */ 851 0x00007fff, /* dst_mask */ 852 FALSE), /* pcrel_offset */ 853 854 /* GNU extension to record C++ vtable hierarchy */ 855 HOWTO (R_NDS32_RELA_GNU_VTINHERIT, /* type */ 856 0, /* rightshift */ 857 2, /* size (0 = byte, 1 = short, 2 = long) */ 858 0, /* bitsize */ 859 FALSE, /* pc_relative */ 860 0, /* bitpos */ 861 complain_overflow_dont,/* complain_on_overflow */ 862 NULL, /* special_function */ 863 "R_NDS32_RELA_GNU_VTINHERIT", /* name */ 864 FALSE, /* partial_inplace */ 865 0, /* src_mask */ 866 0, /* dst_mask */ 867 FALSE), /* pcrel_offset */ 868 869 /* GNU extension to record C++ vtable member usage */ 870 HOWTO (R_NDS32_RELA_GNU_VTENTRY, /* type */ 871 0, /* rightshift */ 872 2, /* size (0 = byte, 1 = short, 2 = long) */ 873 0, /* bitsize */ 874 FALSE, /* pc_relative */ 875 0, /* bitpos */ 876 complain_overflow_dont,/* complain_on_overflow */ 877 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 878 "R_NDS32_RELA_GNU_VTENTRY", /* name */ 879 FALSE, /* partial_inplace */ 880 0, /* src_mask */ 881 0, /* dst_mask */ 882 FALSE), /* pcrel_offset */ 883 884 /* Like R_NDS32_20, but referring to the GOT table entry for 885 the symbol. */ 886 HOWTO (R_NDS32_GOT20, /* type */ 887 0, /* rightshift */ 888 2, /* size (0 = byte, 1 = short, 2 = long) */ 889 20, /* bitsize */ 890 FALSE, /* pc_relative */ 891 0, /* bitpos */ 892 complain_overflow_signed, /* complain_on_overflow */ 893 bfd_elf_generic_reloc, /* special_function */ 894 "R_NDS32_GOT20", /* name */ 895 FALSE, /* partial_inplace */ 896 0xfffff, /* src_mask */ 897 0xfffff, /* dst_mask */ 898 FALSE), /* pcrel_offset */ 899 900 /* Like R_NDS32_PCREL, but referring to the procedure linkage table 901 entry for the symbol. */ 902 HOWTO (R_NDS32_25_PLTREL, /* type */ 903 1, /* rightshift */ 904 2, /* size (0 = byte, 1 = short, 2 = long) */ 905 24, /* bitsize */ 906 TRUE, /* pc_relative */ 907 0, /* bitpos */ 908 complain_overflow_signed, /* complain_on_overflow */ 909 bfd_elf_generic_reloc, /* special_function */ 910 "R_NDS32_25_PLTREL", /* name */ 911 FALSE, /* partial_inplace */ 912 0xffffff, /* src_mask */ 913 0xffffff, /* dst_mask */ 914 TRUE), /* pcrel_offset */ 915 916 /* This is used only by the dynamic linker. The symbol should exist 917 both in the object being run and in some shared library. The 918 dynamic linker copies the data addressed by the symbol from the 919 shared library into the object, because the object being 920 run has to have the data at some particular address. */ 921 HOWTO (R_NDS32_COPY, /* type */ 922 0, /* rightshift */ 923 2, /* size (0 = byte, 1 = short, 2 = long) */ 924 32, /* bitsize */ 925 FALSE, /* pc_relative */ 926 0, /* bitpos */ 927 complain_overflow_bitfield, /* complain_on_overflow */ 928 bfd_elf_generic_reloc, /* special_function */ 929 "R_NDS32_COPY", /* name */ 930 FALSE, /* partial_inplace */ 931 0xffffffff, /* src_mask */ 932 0xffffffff, /* dst_mask */ 933 FALSE), /* pcrel_offset */ 934 935 /* Like R_NDS32_20, but used when setting global offset table 936 entries. */ 937 HOWTO (R_NDS32_GLOB_DAT, /* type */ 938 0, /* rightshift */ 939 2, /* size (0 = byte, 1 = short, 2 = long) */ 940 32, /* bitsize */ 941 FALSE, /* pc_relative */ 942 0, /* bitpos */ 943 complain_overflow_bitfield, /* complain_on_overflow */ 944 bfd_elf_generic_reloc, /* special_function */ 945 "R_NDS32_GLOB_DAT", /* name */ 946 FALSE, /* partial_inplace */ 947 0xffffffff, /* src_mask */ 948 0xffffffff, /* dst_mask */ 949 FALSE), /* pcrel_offset */ 950 951 /* Marks a procedure linkage table entry for a symbol. */ 952 HOWTO (R_NDS32_JMP_SLOT, /* type */ 953 0, /* rightshift */ 954 2, /* size (0 = byte, 1 = short, 2 = long) */ 955 32, /* bitsize */ 956 FALSE, /* pc_relative */ 957 0, /* bitpos */ 958 complain_overflow_bitfield, /* complain_on_overflow */ 959 bfd_elf_generic_reloc, /* special_function */ 960 "R_NDS32_JMP_SLOT", /* name */ 961 FALSE, /* partial_inplace */ 962 0xffffffff, /* src_mask */ 963 0xffffffff, /* dst_mask */ 964 FALSE), /* pcrel_offset */ 965 966 /* Used only by the dynamic linker. When the object is run, this 967 longword is set to the load address of the object, plus the 968 addend. */ 969 HOWTO (R_NDS32_RELATIVE, /* type */ 970 0, /* rightshift */ 971 2, /* size (0 = byte, 1 = short, 2 = long) */ 972 32, /* bitsize */ 973 FALSE, /* pc_relative */ 974 0, /* bitpos */ 975 complain_overflow_bitfield, /* complain_on_overflow */ 976 bfd_elf_generic_reloc, /* special_function */ 977 "R_NDS32_RELATIVE", /* name */ 978 FALSE, /* partial_inplace */ 979 0xffffffff, /* src_mask */ 980 0xffffffff, /* dst_mask */ 981 FALSE), /* pcrel_offset */ 982 983 HOWTO (R_NDS32_GOTOFF, /* type */ 984 0, /* rightshift */ 985 2, /* size (0 = byte, 1 = short, 2 = long) */ 986 20, /* bitsize */ 987 FALSE, /* pc_relative */ 988 0, /* bitpos */ 989 complain_overflow_signed, /* complain_on_overflow */ 990 bfd_elf_generic_reloc, /* special_function */ 991 "R_NDS32_GOTOFF", /* name */ 992 FALSE, /* partial_inplace */ 993 0xfffff, /* src_mask */ 994 0xfffff, /* dst_mask */ 995 FALSE), /* pcrel_offset */ 996 997 /* An PC Relative 20-bit relocation used when setting PIC offset 998 table register. */ 999 HOWTO (R_NDS32_GOTPC20, /* type */ 1000 0, /* rightshift */ 1001 2, /* size (0 = byte, 1 = short, 2 = long) */ 1002 20, /* bitsize */ 1003 TRUE, /* pc_relative */ 1004 0, /* bitpos */ 1005 complain_overflow_signed, /* complain_on_overflow */ 1006 bfd_elf_generic_reloc, /* special_function */ 1007 "R_NDS32_GOTPC20", /* name */ 1008 FALSE, /* partial_inplace */ 1009 0xfffff, /* src_mask */ 1010 0xfffff, /* dst_mask */ 1011 TRUE), /* pcrel_offset */ 1012 1013 /* Like R_NDS32_HI20, but referring to the GOT table entry for 1014 the symbol. */ 1015 HOWTO (R_NDS32_GOT_HI20, /* type */ 1016 12, /* rightshift */ 1017 2, /* size (0 = byte, 1 = short, 2 = long) */ 1018 20, /* bitsize */ 1019 FALSE, /* pc_relative */ 1020 0, /* bitpos */ 1021 complain_overflow_dont,/* complain_on_overflow */ 1022 bfd_elf_generic_reloc, /* special_function */ 1023 "R_NDS32_GOT_HI20", /* name */ 1024 FALSE, /* partial_inplace */ 1025 0x000fffff, /* src_mask */ 1026 0x000fffff, /* dst_mask */ 1027 FALSE), /* pcrel_offset */ 1028 HOWTO (R_NDS32_GOT_LO12, /* type */ 1029 0, /* rightshift */ 1030 2, /* size (0 = byte, 1 = short, 2 = long) */ 1031 12, /* bitsize */ 1032 FALSE, /* pc_relative */ 1033 0, /* bitpos */ 1034 complain_overflow_dont,/* complain_on_overflow */ 1035 bfd_elf_generic_reloc, /* special_function */ 1036 "R_NDS32_GOT_LO12", /* name */ 1037 FALSE, /* partial_inplace */ 1038 0x00000fff, /* src_mask */ 1039 0x00000fff, /* dst_mask */ 1040 FALSE), /* pcrel_offset */ 1041 1042 /* An PC Relative relocation used when setting PIC offset table register. 1043 Like R_NDS32_HI20, but referring to the GOT table entry for 1044 the symbol. */ 1045 HOWTO (R_NDS32_GOTPC_HI20, /* type */ 1046 12, /* rightshift */ 1047 2, /* size (0 = byte, 1 = short, 2 = long) */ 1048 20, /* bitsize */ 1049 FALSE, /* pc_relative */ 1050 0, /* bitpos */ 1051 complain_overflow_dont,/* complain_on_overflow */ 1052 bfd_elf_generic_reloc, /* special_function */ 1053 "R_NDS32_GOTPC_HI20", /* name */ 1054 FALSE, /* partial_inplace */ 1055 0x000fffff, /* src_mask */ 1056 0x000fffff, /* dst_mask */ 1057 TRUE), /* pcrel_offset */ 1058 HOWTO (R_NDS32_GOTPC_LO12, /* type */ 1059 0, /* rightshift */ 1060 2, /* size (0 = byte, 1 = short, 2 = long) */ 1061 12, /* bitsize */ 1062 FALSE, /* pc_relative */ 1063 0, /* bitpos */ 1064 complain_overflow_dont, /* complain_on_overflow */ 1065 bfd_elf_generic_reloc, /* special_function */ 1066 "R_NDS32_GOTPC_LO12", /* name */ 1067 FALSE, /* partial_inplace */ 1068 0x00000fff, /* src_mask */ 1069 0x00000fff, /* dst_mask */ 1070 TRUE), /* pcrel_offset */ 1071 1072 HOWTO (R_NDS32_GOTOFF_HI20, /* type */ 1073 12, /* rightshift */ 1074 2, /* size (0 = byte, 1 = short, 2 = long) */ 1075 20, /* bitsize */ 1076 FALSE, /* pc_relative */ 1077 0, /* bitpos */ 1078 complain_overflow_dont,/* complain_on_overflow */ 1079 bfd_elf_generic_reloc, /* special_function */ 1080 "R_NDS32_GOTOFF_HI20", /* name */ 1081 FALSE, /* partial_inplace */ 1082 0x000fffff, /* src_mask */ 1083 0x000fffff, /* dst_mask */ 1084 FALSE), /* pcrel_offset */ 1085 HOWTO (R_NDS32_GOTOFF_LO12, /* type */ 1086 0, /* rightshift */ 1087 2, /* size (0 = byte, 1 = short, 2 = long) */ 1088 12, /* bitsize */ 1089 FALSE, /* pc_relative */ 1090 0, /* bitpos */ 1091 complain_overflow_dont,/* complain_on_overflow */ 1092 bfd_elf_generic_reloc, /* special_function */ 1093 "R_NDS32_GOTOFF_LO12", /* name */ 1094 FALSE, /* partial_inplace */ 1095 0x00000fff, /* src_mask */ 1096 0x00000fff, /* dst_mask */ 1097 FALSE), /* pcrel_offset */ 1098 1099 /* Alignment hint for relaxable instruction. This is used with 1100 R_NDS32_LABEL as a pair. Relax this instruction from 4 bytes to 2 1101 in order to make next label aligned on word boundary. */ 1102 HOWTO (R_NDS32_INSN16, /* type */ 1103 0, /* rightshift */ 1104 2, /* size (0 = byte, 1 = short, 2 = long) */ 1105 32, /* bitsize */ 1106 FALSE, /* pc_relative */ 1107 0, /* bitpos */ 1108 complain_overflow_dont,/* complain_on_overflow */ 1109 nds32_elf_ignore_reloc,/* special_function */ 1110 "R_NDS32_INSN16", /* name */ 1111 FALSE, /* partial_inplace */ 1112 0x00000fff, /* src_mask */ 1113 0x00000fff, /* dst_mask */ 1114 FALSE), /* pcrel_offset */ 1115 1116 /* Alignment hint for label. */ 1117 HOWTO (R_NDS32_LABEL, /* type */ 1118 0, /* rightshift */ 1119 2, /* size (0 = byte, 1 = short, 2 = long) */ 1120 32, /* bitsize */ 1121 FALSE, /* pc_relative */ 1122 0, /* bitpos */ 1123 complain_overflow_dont,/* complain_on_overflow */ 1124 nds32_elf_ignore_reloc,/* special_function */ 1125 "R_NDS32_LABEL", /* name */ 1126 FALSE, /* partial_inplace */ 1127 0xffffffff, /* src_mask */ 1128 0xffffffff, /* dst_mask */ 1129 FALSE), /* pcrel_offset */ 1130 1131 /* Relax hint for unconditional call sequence */ 1132 HOWTO (R_NDS32_LONGCALL1, /* type */ 1133 0, /* rightshift */ 1134 2, /* size (0 = byte, 1 = short, 2 = long) */ 1135 32, /* bitsize */ 1136 FALSE, /* pc_relative */ 1137 0, /* bitpos */ 1138 complain_overflow_dont,/* complain_on_overflow */ 1139 nds32_elf_ignore_reloc,/* special_function */ 1140 "R_NDS32_LONGCALL1", /* name */ 1141 FALSE, /* partial_inplace */ 1142 0xffffffff, /* src_mask */ 1143 0xffffffff, /* dst_mask */ 1144 FALSE), /* pcrel_offset */ 1145 1146 /* Relax hint for conditional call sequence. */ 1147 HOWTO (R_NDS32_LONGCALL2, /* type */ 1148 0, /* rightshift */ 1149 2, /* size (0 = byte, 1 = short, 2 = long) */ 1150 32, /* bitsize */ 1151 FALSE, /* pc_relative */ 1152 0, /* bitpos */ 1153 complain_overflow_dont,/* complain_on_overflow */ 1154 nds32_elf_ignore_reloc,/* special_function */ 1155 "R_NDS32_LONGCALL2", /* name */ 1156 FALSE, /* partial_inplace */ 1157 0xffffffff, /* src_mask */ 1158 0xffffffff, /* dst_mask */ 1159 FALSE), /* pcrel_offset */ 1160 1161 /* Relax hint for conditional call sequence. */ 1162 HOWTO (R_NDS32_LONGCALL3, /* type */ 1163 0, /* rightshift */ 1164 2, /* size (0 = byte, 1 = short, 2 = long) */ 1165 32, /* bitsize */ 1166 FALSE, /* pc_relative */ 1167 0, /* bitpos */ 1168 complain_overflow_dont,/* complain_on_overflow */ 1169 nds32_elf_ignore_reloc,/* special_function */ 1170 "R_NDS32_LONGCALL3", /* name */ 1171 FALSE, /* partial_inplace */ 1172 0xffffffff, /* src_mask */ 1173 0xffffffff, /* dst_mask */ 1174 FALSE), /* pcrel_offset */ 1175 1176 /* Relax hint for unconditional branch sequence. */ 1177 HOWTO (R_NDS32_LONGJUMP1, /* type */ 1178 0, /* rightshift */ 1179 2, /* size (0 = byte, 1 = short, 2 = long) */ 1180 32, /* bitsize */ 1181 FALSE, /* pc_relative */ 1182 0, /* bitpos */ 1183 complain_overflow_dont,/* complain_on_overflow */ 1184 nds32_elf_ignore_reloc,/* special_function */ 1185 "R_NDS32_LONGJUMP1", /* name */ 1186 FALSE, /* partial_inplace */ 1187 0xffffffff, /* src_mask */ 1188 0xffffffff, /* dst_mask */ 1189 FALSE), /* pcrel_offset */ 1190 1191 /* Relax hint for conditional branch sequence. */ 1192 HOWTO (R_NDS32_LONGJUMP2, /* type */ 1193 0, /* rightshift */ 1194 2, /* size (0 = byte, 1 = short, 2 = long) */ 1195 32, /* bitsize */ 1196 FALSE, /* pc_relative */ 1197 0, /* bitpos */ 1198 complain_overflow_dont,/* complain_on_overflow */ 1199 nds32_elf_ignore_reloc,/* special_function */ 1200 "R_NDS32_LONGJUMP2", /* name */ 1201 FALSE, /* partial_inplace */ 1202 0xffffffff, /* src_mask */ 1203 0xffffffff, /* dst_mask */ 1204 FALSE), /* pcrel_offset */ 1205 1206 /* Relax hint for conditional branch sequence. */ 1207 HOWTO (R_NDS32_LONGJUMP3, /* type */ 1208 0, /* rightshift */ 1209 2, /* size (0 = byte, 1 = short, 2 = long) */ 1210 32, /* bitsize */ 1211 FALSE, /* pc_relative */ 1212 0, /* bitpos */ 1213 complain_overflow_dont,/* complain_on_overflow */ 1214 nds32_elf_ignore_reloc,/* special_function */ 1215 "R_NDS32_LONGJUMP3", /* name */ 1216 FALSE, /* partial_inplace */ 1217 0xffffffff, /* src_mask */ 1218 0xffffffff, /* dst_mask */ 1219 FALSE), /* pcrel_offset */ 1220 1221 /* Relax hint for load/store sequence. */ 1222 HOWTO (R_NDS32_LOADSTORE, /* type */ 1223 0, /* rightshift */ 1224 2, /* size (0 = byte, 1 = short, 2 = long) */ 1225 32, /* bitsize */ 1226 FALSE, /* pc_relative */ 1227 0, /* bitpos */ 1228 complain_overflow_dont,/* complain_on_overflow */ 1229 nds32_elf_ignore_reloc,/* special_function */ 1230 "R_NDS32_LOADSTORE", /* name */ 1231 FALSE, /* partial_inplace */ 1232 0xffffffff, /* src_mask */ 1233 0xffffffff, /* dst_mask */ 1234 FALSE), /* pcrel_offset */ 1235 1236 /* Relax hint for load/store sequence. */ 1237 HOWTO (R_NDS32_9_FIXED_RELA, /* type */ 1238 0, /* rightshift */ 1239 1, /* size (0 = byte, 1 = short, 2 = long) */ 1240 16, /* bitsize */ 1241 FALSE, /* pc_relative */ 1242 0, /* bitpos */ 1243 complain_overflow_dont,/* complain_on_overflow */ 1244 nds32_elf_ignore_reloc,/* special_function */ 1245 "R_NDS32_9_FIXED_RELA",/* name */ 1246 FALSE, /* partial_inplace */ 1247 0x000000ff, /* src_mask */ 1248 0x000000ff, /* dst_mask */ 1249 FALSE), /* pcrel_offset */ 1250 1251 /* Relax hint for load/store sequence. */ 1252 HOWTO (R_NDS32_15_FIXED_RELA, /* type */ 1253 0, /* rightshift */ 1254 2, /* size (0 = byte, 1 = short, 2 = long) */ 1255 32, /* bitsize */ 1256 FALSE, /* pc_relative */ 1257 0, /* bitpos */ 1258 complain_overflow_dont,/* complain_on_overflow */ 1259 nds32_elf_ignore_reloc,/* special_function */ 1260 "R_NDS32_15_FIXED_RELA", /* name */ 1261 FALSE, /* partial_inplace */ 1262 0x00003fff, /* src_mask */ 1263 0x00003fff, /* dst_mask */ 1264 FALSE), /* pcrel_offset */ 1265 1266 /* Relax hint for load/store sequence. */ 1267 HOWTO (R_NDS32_17_FIXED_RELA, /* type */ 1268 0, /* rightshift */ 1269 2, /* size (0 = byte, 1 = short, 2 = long) */ 1270 32, /* bitsize */ 1271 FALSE, /* pc_relative */ 1272 0, /* bitpos */ 1273 complain_overflow_dont,/* complain_on_overflow */ 1274 nds32_elf_ignore_reloc,/* special_function */ 1275 "R_NDS32_17_FIXED_RELA", /* name */ 1276 FALSE, /* partial_inplace */ 1277 0x0000ffff, /* src_mask */ 1278 0x0000ffff, /* dst_mask */ 1279 FALSE), /* pcrel_offset */ 1280 1281 /* Relax hint for load/store sequence. */ 1282 HOWTO (R_NDS32_25_FIXED_RELA, /* type */ 1283 0, /* rightshift */ 1284 2, /* size (0 = byte, 1 = short, 2 = long) */ 1285 32, /* bitsize */ 1286 FALSE, /* pc_relative */ 1287 0, /* bitpos */ 1288 complain_overflow_dont,/* complain_on_overflow */ 1289 nds32_elf_ignore_reloc,/* special_function */ 1290 "R_NDS32_25_FIXED_RELA", /* name */ 1291 FALSE, /* partial_inplace */ 1292 0x00ffffff, /* src_mask */ 1293 0x00ffffff, /* dst_mask */ 1294 FALSE), /* pcrel_offset */ 1295 1296 /* High 20 bits of PLT symbol offset relative to PC. */ 1297 HOWTO (R_NDS32_PLTREL_HI20, /* type */ 1298 12, /* rightshift */ 1299 2, /* size (0 = byte, 1 = short, 2 = long) */ 1300 20, /* bitsize */ 1301 FALSE, /* pc_relative */ 1302 0, /* bitpos */ 1303 complain_overflow_dont,/* complain_on_overflow */ 1304 bfd_elf_generic_reloc, /* special_function */ 1305 "R_NDS32_PLTREL_HI20", /* name */ 1306 FALSE, /* partial_inplace */ 1307 0x000fffff, /* src_mask */ 1308 0x000fffff, /* dst_mask */ 1309 FALSE), /* pcrel_offset */ 1310 1311 /* Low 12 bits of PLT symbol offset relative to PC. */ 1312 HOWTO (R_NDS32_PLTREL_LO12, /* type */ 1313 0, /* rightshift */ 1314 2, /* size (0 = byte, 1 = short, 2 = long) */ 1315 12, /* bitsize */ 1316 FALSE, /* pc_relative */ 1317 0, /* bitpos */ 1318 complain_overflow_dont,/* complain_on_overflow */ 1319 bfd_elf_generic_reloc, /* special_function */ 1320 "R_NDS32_PLTREL_LO12", /* name */ 1321 FALSE, /* partial_inplace */ 1322 0x00000fff, /* src_mask */ 1323 0x00000fff, /* dst_mask */ 1324 FALSE), /* pcrel_offset */ 1325 1326 /* High 20 bits of PLT symbol offset relative to GOT (GP). */ 1327 HOWTO (R_NDS32_PLT_GOTREL_HI20, /* type */ 1328 12, /* rightshift */ 1329 2, /* size (0 = byte, 1 = short, 2 = long) */ 1330 20, /* bitsize */ 1331 FALSE, /* pc_relative */ 1332 0, /* bitpos */ 1333 complain_overflow_dont,/* complain_on_overflow */ 1334 bfd_elf_generic_reloc, /* special_function */ 1335 "R_NDS32_PLT_GOTREL_HI20", /* name */ 1336 FALSE, /* partial_inplace */ 1337 0x000fffff, /* src_mask */ 1338 0x000fffff, /* dst_mask */ 1339 FALSE), /* pcrel_offset */ 1340 1341 /* Low 12 bits of PLT symbol offset relative to GOT (GP). */ 1342 HOWTO (R_NDS32_PLT_GOTREL_LO12, /* type */ 1343 0, /* rightshift */ 1344 2, /* size (0 = byte, 1 = short, 2 = long) */ 1345 12, /* bitsize */ 1346 FALSE, /* pc_relative */ 1347 0, /* bitpos */ 1348 complain_overflow_dont,/* complain_on_overflow */ 1349 bfd_elf_generic_reloc, /* special_function */ 1350 "R_NDS32_PLT_GOTREL_LO12", /* name */ 1351 FALSE, /* partial_inplace */ 1352 0x00000fff, /* src_mask */ 1353 0x00000fff, /* dst_mask */ 1354 FALSE), /* pcrel_offset */ 1355 1356 /* Small data area 12 bits offset. */ 1357 HOWTO (R_NDS32_SDA12S2_DP_RELA, /* type */ 1358 2, /* rightshift */ 1359 2, /* size (0 = byte, 1 = short, 2 = long) */ 1360 12, /* bitsize */ 1361 FALSE, /* pc_relative */ 1362 0, /* bitpos */ 1363 complain_overflow_signed, /* complain_on_overflow */ 1364 bfd_elf_generic_reloc, /* special_function */ 1365 "R_NDS32_SDA12S2_DP_RELA", /* name */ 1366 FALSE, /* partial_inplace */ 1367 0x00000fff, /* src_mask */ 1368 0x00000fff, /* dst_mask */ 1369 FALSE), /* pcrel_offset */ 1370 1371 /* Small data area 12 bits offset. */ 1372 HOWTO (R_NDS32_SDA12S2_SP_RELA, /* type */ 1373 2, /* rightshift */ 1374 2, /* size (0 = byte, 1 = short, 2 = long) */ 1375 12, /* bitsize */ 1376 FALSE, /* pc_relative */ 1377 0, /* bitpos */ 1378 complain_overflow_signed, /* complain_on_overflow */ 1379 bfd_elf_generic_reloc, /* special_function */ 1380 "R_NDS32_SDA12S2_SP_RELA", /* name */ 1381 FALSE, /* partial_inplace */ 1382 0x00000fff, /* src_mask */ 1383 0x00000fff, /* dst_mask */ 1384 FALSE), /* pcrel_offset */ 1385 /* Lower 12 bits of address. */ 1386 1387 HOWTO (R_NDS32_LO12S2_DP_RELA, /* type */ 1388 2, /* rightshift */ 1389 2, /* size (0 = byte, 1 = short, 2 = long) */ 1390 10, /* bitsize */ 1391 FALSE, /* pc_relative */ 1392 0, /* bitpos */ 1393 complain_overflow_dont,/* complain_on_overflow */ 1394 bfd_elf_generic_reloc, /* special_function */ 1395 "R_NDS32_LO12S2_DP_RELA", /* name */ 1396 FALSE, /* partial_inplace */ 1397 0x000003ff, /* src_mask */ 1398 0x000003ff, /* dst_mask */ 1399 FALSE), /* pcrel_offset */ 1400 1401 /* Lower 12 bits of address. */ 1402 HOWTO (R_NDS32_LO12S2_SP_RELA,/* type */ 1403 2, /* rightshift */ 1404 2, /* size (0 = byte, 1 = short, 2 = long) */ 1405 10, /* bitsize */ 1406 FALSE, /* pc_relative */ 1407 0, /* bitpos */ 1408 complain_overflow_dont,/* complain_on_overflow */ 1409 bfd_elf_generic_reloc, /* special_function */ 1410 "R_NDS32_LO12S2_SP_RELA", /* name */ 1411 FALSE, /* partial_inplace */ 1412 0x000003ff, /* src_mask */ 1413 0x000003ff, /* dst_mask */ 1414 FALSE), /* pcrel_offset */ 1415 /* Lower 12 bits of address. Special identity for or case. */ 1416 HOWTO (R_NDS32_LO12S0_ORI_RELA, /* type */ 1417 0, /* rightshift */ 1418 2, /* size (0 = byte, 1 = short, 2 = long) */ 1419 12, /* bitsize */ 1420 FALSE, /* pc_relative */ 1421 0, /* bitpos */ 1422 complain_overflow_dont,/* complain_on_overflow */ 1423 bfd_elf_generic_reloc, /* special_function */ 1424 "R_NDS32_LO12S0_ORI_RELA", /* name */ 1425 FALSE, /* partial_inplace */ 1426 0x00000fff, /* src_mask */ 1427 0x00000fff, /* dst_mask */ 1428 FALSE), /* pcrel_offset */ 1429 /* Small data area 19 bits offset. */ 1430 HOWTO (R_NDS32_SDA16S3_RELA, /* type */ 1431 3, /* rightshift */ 1432 2, /* size (0 = byte, 1 = short, 2 = long) */ 1433 16, /* bitsize */ 1434 FALSE, /* pc_relative */ 1435 0, /* bitpos */ 1436 complain_overflow_signed, /* complain_on_overflow */ 1437 bfd_elf_generic_reloc, /* special_function */ 1438 "R_NDS32_SDA16S3_RELA",/* name */ 1439 FALSE, /* partial_inplace */ 1440 0x0000ffff, /* src_mask */ 1441 0x0000ffff, /* dst_mask */ 1442 FALSE), /* pcrel_offset */ 1443 1444 /* Small data area 15 bits offset. */ 1445 HOWTO (R_NDS32_SDA17S2_RELA, /* type */ 1446 2, /* rightshift */ 1447 2, /* size (0 = byte, 1 = short, 2 = long) */ 1448 17, /* bitsize */ 1449 FALSE, /* pc_relative */ 1450 0, /* bitpos */ 1451 complain_overflow_signed, /* complain_on_overflow */ 1452 bfd_elf_generic_reloc, /* special_function */ 1453 "R_NDS32_SDA17S2_RELA",/* name */ 1454 FALSE, /* partial_inplace */ 1455 0x0001ffff, /* src_mask */ 1456 0x0001ffff, /* dst_mask */ 1457 FALSE), /* pcrel_offset */ 1458 1459 HOWTO (R_NDS32_SDA18S1_RELA, /* type */ 1460 1, /* rightshift */ 1461 2, /* size (0 = byte, 1 = short, 2 = long) */ 1462 18, /* bitsize */ 1463 FALSE, /* pc_relative */ 1464 0, /* bitpos */ 1465 complain_overflow_signed, /* complain_on_overflow */ 1466 bfd_elf_generic_reloc, /* special_function */ 1467 "R_NDS32_SDA18S1_RELA",/* name */ 1468 FALSE, /* partial_inplace */ 1469 0x0003ffff, /* src_mask */ 1470 0x0003ffff, /* dst_mask */ 1471 FALSE), /* pcrel_offset */ 1472 1473 HOWTO (R_NDS32_SDA19S0_RELA, /* type */ 1474 0, /* rightshift */ 1475 2, /* size (0 = byte, 1 = short, 2 = long) */ 1476 19, /* bitsize */ 1477 FALSE, /* pc_relative */ 1478 0, /* bitpos */ 1479 complain_overflow_signed, /* complain_on_overflow */ 1480 bfd_elf_generic_reloc, /* special_function */ 1481 "R_NDS32_SDA19S0_RELA",/* name */ 1482 FALSE, /* partial_inplace */ 1483 0x0007ffff, /* src_mask */ 1484 0x0007ffff, /* dst_mask */ 1485 FALSE), /* pcrel_offset */ 1486 HOWTO (R_NDS32_DWARF2_OP1_RELA, /* type */ 1487 0, /* rightshift */ 1488 0, /* size (0 = byte, 1 = short, 2 = long) */ 1489 8, /* bitsize */ 1490 FALSE, /* pc_relative */ 1491 0, /* bitpos */ 1492 complain_overflow_dont,/* complain_on_overflow */ 1493 nds32_elf_ignore_reloc,/* special_function */ 1494 "R_NDS32_DWARF2_OP1_RELA", /* name */ 1495 FALSE, /* partial_inplace */ 1496 0xff, /* src_mask */ 1497 0xff, /* dst_mask */ 1498 FALSE), /* pcrel_offset */ 1499 HOWTO (R_NDS32_DWARF2_OP2_RELA, /* type */ 1500 0, /* rightshift */ 1501 1, /* size (0 = byte, 1 = short, 2 = long) */ 1502 16, /* bitsize */ 1503 FALSE, /* pc_relative */ 1504 0, /* bitpos */ 1505 complain_overflow_dont,/* complain_on_overflow */ 1506 nds32_elf_ignore_reloc,/* special_function */ 1507 "R_NDS32_DWARF2_OP2_RELA", /* name */ 1508 FALSE, /* partial_inplace */ 1509 0xffff, /* src_mask */ 1510 0xffff, /* dst_mask */ 1511 FALSE), /* pcrel_offset */ 1512 HOWTO (R_NDS32_DWARF2_LEB_RELA, /* type */ 1513 0, /* rightshift */ 1514 2, /* size (0 = byte, 1 = short, 2 = long) */ 1515 32, /* bitsize */ 1516 FALSE, /* pc_relative */ 1517 0, /* bitpos */ 1518 complain_overflow_dont,/* complain_on_overflow */ 1519 nds32_elf_ignore_reloc,/* special_function */ 1520 "R_NDS32_DWARF2_LEB_RELA", /* name */ 1521 FALSE, /* partial_inplace */ 1522 0xffffffff, /* src_mask */ 1523 0xffffffff, /* dst_mask */ 1524 FALSE), /* pcrel_offset */ 1525 HOWTO (R_NDS32_UPDATE_TA_RELA,/* type */ 1526 0, /* rightshift */ 1527 1, /* size (0 = byte, 1 = short, 2 = long) */ 1528 16, /* bitsize */ 1529 FALSE, /* pc_relative */ 1530 0, /* bitpos */ 1531 complain_overflow_dont,/* complain_on_overflow */ 1532 nds32_elf_ignore_reloc,/* special_function */ 1533 "R_NDS32_UPDATE_TA_RELA", /* name */ 1534 FALSE, /* partial_inplace */ 1535 0xffff, /* src_mask */ 1536 0xffff, /* dst_mask */ 1537 FALSE), /* pcrel_offset */ 1538 /* Like R_NDS32_PCREL, but referring to the procedure linkage table 1539 entry for the symbol. */ 1540 HOWTO (R_NDS32_9_PLTREL, /* type */ 1541 1, /* rightshift */ 1542 1, /* size (0 = byte, 1 = short, 2 = long) */ 1543 8, /* bitsize */ 1544 TRUE, /* pc_relative */ 1545 0, /* bitpos */ 1546 complain_overflow_signed, /* complain_on_overflow */ 1547 bfd_elf_generic_reloc, /* special_function */ 1548 "R_NDS32_9_PLTREL", /* name */ 1549 FALSE, /* partial_inplace */ 1550 0xff, /* src_mask */ 1551 0xff, /* dst_mask */ 1552 TRUE), /* pcrel_offset */ 1553 /* Low 20 bits of PLT symbol offset relative to GOT (GP). */ 1554 HOWTO (R_NDS32_PLT_GOTREL_LO20, /* type */ 1555 0, /* rightshift */ 1556 2, /* size (0 = byte, 1 = short, 2 = long) */ 1557 20, /* bitsize */ 1558 FALSE, /* pc_relative */ 1559 0, /* bitpos */ 1560 complain_overflow_dont,/* complain_on_overflow */ 1561 bfd_elf_generic_reloc, /* special_function */ 1562 "R_NDS32_PLT_GOTREL_LO20", /* name */ 1563 FALSE, /* partial_inplace */ 1564 0x000fffff, /* src_mask */ 1565 0x000fffff, /* dst_mask */ 1566 FALSE), /* pcrel_offset */ 1567 /* low 15 bits of PLT symbol offset relative to GOT (GP) */ 1568 HOWTO (R_NDS32_PLT_GOTREL_LO15, /* type */ 1569 0, /* rightshift */ 1570 2, /* size (0 = byte, 1 = short, 2 = long) */ 1571 15, /* bitsize */ 1572 FALSE, /* pc_relative */ 1573 0, /* bitpos */ 1574 complain_overflow_dont,/* complain_on_overflow */ 1575 bfd_elf_generic_reloc, /* special_function */ 1576 "R_NDS32_PLT_GOTREL_LO15", /* name */ 1577 FALSE, /* partial_inplace */ 1578 0x00007fff, /* src_mask */ 1579 0x00007fff, /* dst_mask */ 1580 FALSE), /* pcrel_offset */ 1581 /* Low 19 bits of PLT symbol offset relative to GOT (GP). */ 1582 HOWTO (R_NDS32_PLT_GOTREL_LO19, /* type */ 1583 0, /* rightshift */ 1584 2, /* size (0 = byte, 1 = short, 2 = long) */ 1585 19, /* bitsize */ 1586 FALSE, /* pc_relative */ 1587 0, /* bitpos */ 1588 complain_overflow_dont,/* complain_on_overflow */ 1589 bfd_elf_generic_reloc, /* special_function */ 1590 "R_NDS32_PLT_GOTREL_LO19", /* name */ 1591 FALSE, /* partial_inplace */ 1592 0x0007ffff, /* src_mask */ 1593 0x0007ffff, /* dst_mask */ 1594 FALSE), /* pcrel_offset */ 1595 HOWTO (R_NDS32_GOT_LO15, /* type */ 1596 0, /* rightshift */ 1597 2, /* size (0 = byte, 1 = short, 2 = long) */ 1598 15, /* bitsize */ 1599 FALSE, /* pc_relative */ 1600 0, /* bitpos */ 1601 complain_overflow_dont,/* complain_on_overflow */ 1602 bfd_elf_generic_reloc, /* special_function */ 1603 "R_NDS32_GOT_LO15", /* name */ 1604 FALSE, /* partial_inplace */ 1605 0x00007fff, /* src_mask */ 1606 0x00007fff, /* dst_mask */ 1607 FALSE), /* pcrel_offset */ 1608 HOWTO (R_NDS32_GOT_LO19, /* type */ 1609 0, /* rightshift */ 1610 2, /* size (0 = byte, 1 = short, 2 = long) */ 1611 19, /* bitsize */ 1612 FALSE, /* pc_relative */ 1613 0, /* bitpos */ 1614 complain_overflow_dont,/* complain_on_overflow */ 1615 bfd_elf_generic_reloc, /* special_function */ 1616 "R_NDS32_GOT_LO19", /* name */ 1617 FALSE, /* partial_inplace */ 1618 0x0007ffff, /* src_mask */ 1619 0x0007ffff, /* dst_mask */ 1620 FALSE), /* pcrel_offset */ 1621 HOWTO (R_NDS32_GOTOFF_LO15, /* type */ 1622 0, /* rightshift */ 1623 2, /* size (0 = byte, 1 = short, 2 = long) */ 1624 15, /* bitsize */ 1625 FALSE, /* pc_relative */ 1626 0, /* bitpos */ 1627 complain_overflow_dont,/* complain_on_overflow */ 1628 bfd_elf_generic_reloc, /* special_function */ 1629 "R_NDS32_GOTOFF_LO15", /* name */ 1630 FALSE, /* partial_inplace */ 1631 0x00007fff, /* src_mask */ 1632 0x00007fff, /* dst_mask */ 1633 FALSE), /* pcrel_offset */ 1634 HOWTO (R_NDS32_GOTOFF_LO19, /* type */ 1635 0, /* rightshift */ 1636 2, /* size (0 = byte, 1 = short, 2 = long) */ 1637 19, /* bitsize */ 1638 FALSE, /* pc_relative */ 1639 0, /* bitpos */ 1640 complain_overflow_dont,/* complain_on_overflow */ 1641 bfd_elf_generic_reloc, /* special_function */ 1642 "R_NDS32_GOTOFF_LO19", /* name */ 1643 FALSE, /* partial_inplace */ 1644 0x0007ffff, /* src_mask */ 1645 0x0007ffff, /* dst_mask */ 1646 FALSE), /* pcrel_offset */ 1647 /* GOT 15 bits offset. */ 1648 HOWTO (R_NDS32_GOT15S2_RELA, /* type */ 1649 2, /* rightshift */ 1650 2, /* size (0 = byte, 1 = short, 2 = long) */ 1651 15, /* bitsize */ 1652 FALSE, /* pc_relative */ 1653 0, /* bitpos */ 1654 complain_overflow_signed, /* complain_on_overflow */ 1655 bfd_elf_generic_reloc, /* special_function */ 1656 "R_NDS32_GOT15S2_RELA",/* name */ 1657 FALSE, /* partial_inplace */ 1658 0x00007fff, /* src_mask */ 1659 0x00007fff, /* dst_mask */ 1660 FALSE), /* pcrel_offset */ 1661 /* GOT 17 bits offset. */ 1662 HOWTO (R_NDS32_GOT17S2_RELA, /* type */ 1663 2, /* rightshift */ 1664 2, /* size (0 = byte, 1 = short, 2 = long) */ 1665 17, /* bitsize */ 1666 FALSE, /* pc_relative */ 1667 0, /* bitpos */ 1668 complain_overflow_signed, /* complain_on_overflow */ 1669 bfd_elf_generic_reloc, /* special_function */ 1670 "R_NDS32_GOT17S2_RELA",/* name */ 1671 FALSE, /* partial_inplace */ 1672 0x0001ffff, /* src_mask */ 1673 0x0001ffff, /* dst_mask */ 1674 FALSE), /* pcrel_offset */ 1675 /* A 5 bit address. */ 1676 HOWTO (R_NDS32_5_RELA, /* type */ 1677 0, /* rightshift */ 1678 1, /* size (0 = byte, 1 = short, 2 = long) */ 1679 5, /* bitsize */ 1680 FALSE, /* pc_relative */ 1681 0, /* bitpos */ 1682 complain_overflow_signed, /* complain_on_overflow */ 1683 bfd_elf_generic_reloc, /* special_function */ 1684 "R_NDS32_5_RELA", /* name */ 1685 FALSE, /* partial_inplace */ 1686 0x1f, /* src_mask */ 1687 0x1f, /* dst_mask */ 1688 FALSE), /* pcrel_offset */ 1689 HOWTO (R_NDS32_10_UPCREL_RELA,/* type */ 1690 1, /* rightshift */ 1691 1, /* size (0 = byte, 1 = short, 2 = long) */ 1692 9, /* bitsize */ 1693 TRUE, /* pc_relative */ 1694 0, /* bitpos */ 1695 complain_overflow_unsigned, /* complain_on_overflow */ 1696 bfd_elf_generic_reloc, /* special_function */ 1697 "R_NDS32_10_UPCREL_RELA", /* name */ 1698 FALSE, /* partial_inplace */ 1699 0x1ff, /* src_mask */ 1700 0x1ff, /* dst_mask */ 1701 TRUE), /* pcrel_offset */ 1702 HOWTO (R_NDS32_SDA_FP7U2_RELA,/* type */ 1703 2, /* rightshift */ 1704 1, /* size (0 = byte, 1 = short, 2 = long) */ 1705 7, /* bitsize */ 1706 FALSE, /* pc_relative */ 1707 0, /* bitpos */ 1708 complain_overflow_unsigned, /* complain_on_overflow */ 1709 bfd_elf_generic_reloc, /* special_function */ 1710 "R_NDS32_SDA_FP7U2_RELA", /* name */ 1711 FALSE, /* partial_inplace */ 1712 0x0000007f, /* src_mask */ 1713 0x0000007f, /* dst_mask */ 1714 FALSE), /* pcrel_offset */ 1715 HOWTO (R_NDS32_WORD_9_PCREL_RELA, /* type */ 1716 1, /* rightshift */ 1717 2, /* size (0 = byte, 1 = short, 2 = long) */ 1718 8, /* bitsize */ 1719 TRUE, /* pc_relative */ 1720 0, /* bitpos */ 1721 complain_overflow_signed, /* complain_on_overflow */ 1722 bfd_elf_generic_reloc, /* special_function */ 1723 "R_NDS32_WORD_9_PCREL_RELA", /* name */ 1724 FALSE, /* partial_inplace */ 1725 0xff, /* src_mask */ 1726 0xff, /* dst_mask */ 1727 TRUE), /* pcrel_offset */ 1728 HOWTO (R_NDS32_25_ABS_RELA, /* type */ 1729 1, /* rightshift */ 1730 2, /* size (0 = byte, 1 = short, 2 = long) */ 1731 24, /* bitsize */ 1732 FALSE, /* pc_relative */ 1733 0, /* bitpos */ 1734 complain_overflow_dont,/* complain_on_overflow */ 1735 bfd_elf_generic_reloc, /* special_function */ 1736 "R_NDS32_25_ABS_RELA", /* name */ 1737 FALSE, /* partial_inplace */ 1738 0xffffff, /* src_mask */ 1739 0xffffff, /* dst_mask */ 1740 FALSE), /* pcrel_offset */ 1741 1742 /* A relative 17 bit relocation for ifc, right shifted by 1. */ 1743 HOWTO (R_NDS32_17IFC_PCREL_RELA, /* type */ 1744 1, /* rightshift */ 1745 2, /* size (0 = byte, 1 = short, 2 = long) */ 1746 16, /* bitsize */ 1747 TRUE, /* pc_relative */ 1748 0, /* bitpos */ 1749 complain_overflow_signed, /* complain_on_overflow */ 1750 bfd_elf_generic_reloc, /* special_function */ 1751 "R_NDS32_17IFC_PCREL_RELA", /* name */ 1752 FALSE, /* partial_inplace */ 1753 0xffff, /* src_mask */ 1754 0xffff, /* dst_mask */ 1755 TRUE), /* pcrel_offset */ 1756 1757 /* A relative unsigned 10 bit relocation for ifc, right shifted by 1. */ 1758 HOWTO (R_NDS32_10IFCU_PCREL_RELA, /* type */ 1759 1, /* rightshift */ 1760 1, /* size (0 = byte, 1 = short, 2 = long) */ 1761 9, /* bitsize */ 1762 TRUE, /* pc_relative */ 1763 0, /* bitpos */ 1764 complain_overflow_unsigned, /* complain_on_overflow */ 1765 bfd_elf_generic_reloc, /* special_function */ 1766 "R_NDS32_10IFCU_PCREL_RELA", /* name */ 1767 FALSE, /* partial_inplace */ 1768 0x1ff, /* src_mask */ 1769 0x1ff, /* dst_mask */ 1770 TRUE), /* pcrel_offset */ 1771 1772 /* Like R_NDS32_HI20, but referring to the TLS entry for the symbol. */ 1773 HOWTO (R_NDS32_TLS_LE_HI20, /* type */ 1774 12, /* rightshift */ 1775 2, /* size (0 = byte, 1 = short, 2 = long) */ 1776 20, /* bitsize */ 1777 FALSE, /* pc_relative */ 1778 0, /* bitpos */ 1779 complain_overflow_dont, /* complain_on_overflow */ 1780 bfd_elf_generic_reloc, /* special_function */ 1781 "R_NDS32_TLS_LE_HI20", /* name */ 1782 FALSE, /* partial_inplace */ 1783 0x000fffff, /* src_mask */ 1784 0x000fffff, /* dst_mask */ 1785 FALSE), /* pcrel_offset */ 1786 HOWTO (R_NDS32_TLS_LE_LO12, /* type */ 1787 0, /* rightshift */ 1788 2, /* size (0 = byte, 1 = short, 2 = long) */ 1789 12, /* bitsize */ 1790 FALSE, /* pc_relative */ 1791 0, /* bitpos */ 1792 complain_overflow_dont, /* complain_on_overflow */ 1793 bfd_elf_generic_reloc, /* special_function */ 1794 "R_NDS32_TLS_LE_LO12", /* name */ 1795 FALSE, /* partial_inplace */ 1796 0x00000fff, /* src_mask */ 1797 0x00000fff, /* dst_mask */ 1798 FALSE), /* pcrel_offset */ 1799 1800 /* Like R_NDS32_HI20, but referring to the TLS entry for the symbol. */ 1801 HOWTO (R_NDS32_TLS_IE_HI20, /* type */ 1802 12, /* rightshift */ 1803 2, /* size (0 = byte, 1 = short, 2 = long) */ 1804 20, /* bitsize */ 1805 FALSE, /* pc_relative */ 1806 0, /* bitpos */ 1807 complain_overflow_dont, /* complain_on_overflow */ 1808 bfd_elf_generic_reloc, /* special_function */ 1809 "R_NDS32_TLS_IE_HI20", /* name */ 1810 FALSE, /* partial_inplace */ 1811 0x000fffff, /* src_mask */ 1812 0x000fffff, /* dst_mask */ 1813 FALSE), /* pcrel_offset */ 1814 HOWTO (R_NDS32_TLS_IE_LO12S2, /* type */ 1815 2, /* rightshift */ 1816 2, /* size (0 = byte, 1 = short, 2 = long) */ 1817 10, /* bitsize */ 1818 FALSE, /* pc_relative */ 1819 0, /* bitpos */ 1820 complain_overflow_dont, /* complain_on_overflow */ 1821 bfd_elf_generic_reloc, /* special_function */ 1822 "R_NDS32_TLS_IE_LO12S2", /* name */ 1823 FALSE, /* partial_inplace */ 1824 0x000003ff, /* src_mask */ 1825 0x000003ff, /* dst_mask */ 1826 FALSE), /* pcrel_offset */ 1827 /* Mark a TLS IE entry in GOT. */ 1828 HOWTO (R_NDS32_TLS_TPOFF, /* type */ 1829 0, /* rightshift */ 1830 2, /* size (0 = byte, 1 = short, 2 = long) */ 1831 32, /* bitsize */ 1832 FALSE, /* pc_relative */ 1833 0, /* bitpos */ 1834 complain_overflow_bitfield, /* complain_on_overflow */ 1835 bfd_elf_generic_reloc, /* special_function */ 1836 "R_NDS32_TLS_TPOFF", /* name */ 1837 FALSE, /* partial_inplace */ 1838 0xffffffff, /* src_mask */ 1839 0xffffffff, /* dst_mask */ 1840 FALSE), /* pcrel_offset */ 1841 /* A 20 bit address. */ 1842 HOWTO (R_NDS32_TLS_LE_20, /* type */ 1843 0, /* rightshift */ 1844 2, /* size (0 = byte, 1 = short, 2 = long) */ 1845 20, /* bitsize */ 1846 FALSE, /* pc_relative */ 1847 0, /* bitpos */ 1848 complain_overflow_signed, /* complain_on_overflow */ 1849 bfd_elf_generic_reloc, /* special_function */ 1850 "R_NDS32_TLS_LE_20", /* name */ 1851 FALSE, /* partial_inplace */ 1852 0xfffff, /* src_mask */ 1853 0xfffff, /* dst_mask */ 1854 FALSE), /* pcrel_offset */ 1855 HOWTO (R_NDS32_TLS_LE_15S0, /* type */ 1856 0, /* rightshift */ 1857 2, /* size (0 = byte, 1 = short, 2 = long) */ 1858 15, /* bitsize */ 1859 FALSE, /* pc_relative */ 1860 0, /* bitpos */ 1861 complain_overflow_signed, /* complain_on_overflow */ 1862 bfd_elf_generic_reloc, /* special_function */ 1863 "R_NDS32_TLS_LE_15S0", /* name */ 1864 FALSE, /* partial_inplace */ 1865 0x7fff, /* src_mask */ 1866 0x7fff, /* dst_mask */ 1867 FALSE), /* pcrel_offset */ 1868 HOWTO (R_NDS32_TLS_LE_15S1, /* type */ 1869 1, /* rightshift */ 1870 2, /* size (0 = byte, 1 = short, 2 = long) */ 1871 15, /* bitsize */ 1872 FALSE, /* pc_relative */ 1873 0, /* bitpos */ 1874 complain_overflow_signed, /* complain_on_overflow */ 1875 bfd_elf_generic_reloc, /* special_function */ 1876 "R_NDS32_TLS_LE_15S1", /* name */ 1877 FALSE, /* partial_inplace */ 1878 0x7fff, /* src_mask */ 1879 0x7fff, /* dst_mask */ 1880 FALSE), /* pcrel_offset */ 1881 HOWTO (R_NDS32_TLS_LE_15S2, /* type */ 1882 2, /* rightshift */ 1883 2, /* size (0 = byte, 1 = short, 2 = long) */ 1884 15, /* bitsize */ 1885 FALSE, /* pc_relative */ 1886 0, /* bitpos */ 1887 complain_overflow_signed, /* complain_on_overflow */ 1888 bfd_elf_generic_reloc, /* special_function */ 1889 "R_NDS32_TLS_LE_15S2", /* name */ 1890 FALSE, /* partial_inplace */ 1891 0x7fff, /* src_mask */ 1892 0x7fff, /* dst_mask */ 1893 FALSE), /* pcrel_offset */ 1894 1895 /* Relax hint for unconditional call sequence */ 1896 HOWTO (R_NDS32_LONGCALL4, /* type */ 1897 0, /* rightshift */ 1898 2, /* size (0 = byte, 1 = short, 2 = long) */ 1899 32, /* bitsize */ 1900 FALSE, /* pc_relative */ 1901 0, /* bitpos */ 1902 complain_overflow_dont, /* complain_on_overflow */ 1903 nds32_elf_ignore_reloc, /* special_function */ 1904 "R_NDS32_LONGCALL4", /* name */ 1905 FALSE, /* partial_inplace */ 1906 0xffffffff, /* src_mask */ 1907 0xffffffff, /* dst_mask */ 1908 FALSE), /* pcrel_offset */ 1909 1910 /* Relax hint for conditional call sequence. */ 1911 HOWTO (R_NDS32_LONGCALL5, /* type */ 1912 0, /* rightshift */ 1913 2, /* size (0 = byte, 1 = short, 2 = long) */ 1914 32, /* bitsize */ 1915 FALSE, /* pc_relative */ 1916 0, /* bitpos */ 1917 complain_overflow_dont, /* complain_on_overflow */ 1918 nds32_elf_ignore_reloc, /* special_function */ 1919 "R_NDS32_LONGCALL5", /* name */ 1920 FALSE, /* partial_inplace */ 1921 0xffffffff, /* src_mask */ 1922 0xffffffff, /* dst_mask */ 1923 FALSE), /* pcrel_offset */ 1924 1925 /* Relax hint for conditional call sequence. */ 1926 HOWTO (R_NDS32_LONGCALL6, /* type */ 1927 0, /* rightshift */ 1928 2, /* size (0 = byte, 1 = short, 2 = long) */ 1929 32, /* bitsize */ 1930 FALSE, /* pc_relative */ 1931 0, /* bitpos */ 1932 complain_overflow_dont, /* complain_on_overflow */ 1933 nds32_elf_ignore_reloc, /* special_function */ 1934 "R_NDS32_LONGCALL6", /* name */ 1935 FALSE, /* partial_inplace */ 1936 0xffffffff, /* src_mask */ 1937 0xffffffff, /* dst_mask */ 1938 FALSE), /* pcrel_offset */ 1939 1940 /* Relax hint for unconditional branch sequence. */ 1941 HOWTO (R_NDS32_LONGJUMP4, /* type */ 1942 0, /* rightshift */ 1943 2, /* size (0 = byte, 1 = short, 2 = long) */ 1944 32, /* bitsize */ 1945 FALSE, /* pc_relative */ 1946 0, /* bitpos */ 1947 complain_overflow_dont, /* complain_on_overflow */ 1948 nds32_elf_ignore_reloc, /* special_function */ 1949 "R_NDS32_LONGJUMP4", /* name */ 1950 FALSE, /* partial_inplace */ 1951 0xffffffff, /* src_mask */ 1952 0xffffffff, /* dst_mask */ 1953 FALSE), /* pcrel_offset */ 1954 1955 /* Relax hint for conditional branch sequence. */ 1956 HOWTO (R_NDS32_LONGJUMP5, /* type */ 1957 0, /* rightshift */ 1958 2, /* size (0 = byte, 1 = short, 2 = long) */ 1959 32, /* bitsize */ 1960 FALSE, /* pc_relative */ 1961 0, /* bitpos */ 1962 complain_overflow_dont, /* complain_on_overflow */ 1963 nds32_elf_ignore_reloc, /* special_function */ 1964 "R_NDS32_LONGJUMP5", /* name */ 1965 FALSE, /* partial_inplace */ 1966 0xffffffff, /* src_mask */ 1967 0xffffffff, /* dst_mask */ 1968 FALSE), /* pcrel_offset */ 1969 1970 /* Relax hint for conditional branch sequence. */ 1971 HOWTO (R_NDS32_LONGJUMP6, /* type */ 1972 0, /* rightshift */ 1973 2, /* size (0 = byte, 1 = short, 2 = long) */ 1974 32, /* bitsize */ 1975 FALSE, /* pc_relative */ 1976 0, /* bitpos */ 1977 complain_overflow_dont, /* complain_on_overflow */ 1978 nds32_elf_ignore_reloc, /* special_function */ 1979 "R_NDS32_LONGJUMP6", /* name */ 1980 FALSE, /* partial_inplace */ 1981 0xffffffff, /* src_mask */ 1982 0xffffffff, /* dst_mask */ 1983 FALSE), /* pcrel_offset */ 1984 1985 /* Relax hint for conditional branch sequence. */ 1986 HOWTO (R_NDS32_LONGJUMP7, /* type */ 1987 0, /* rightshift */ 1988 2, /* size (0 = byte, 1 = short, 2 = long) */ 1989 32, /* bitsize */ 1990 FALSE, /* pc_relative */ 1991 0, /* bitpos */ 1992 complain_overflow_dont, /* complain_on_overflow */ 1993 nds32_elf_ignore_reloc, /* special_function */ 1994 "R_NDS32_LONGJUMP7", /* name */ 1995 FALSE, /* partial_inplace */ 1996 0xffffffff, /* src_mask */ 1997 0xffffffff, /* dst_mask */ 1998 FALSE), /* pcrel_offset */ 1999}; 2000 2001/* Relocations used for relaxation. */ 2002static reloc_howto_type nds32_elf_relax_howto_table[] = 2003{ 2004 HOWTO (R_NDS32_RELAX_ENTRY, /* type */ 2005 0, /* rightshift */ 2006 2, /* size (0 = byte, 1 = short, 2 = long) */ 2007 32, /* bitsize */ 2008 FALSE, /* pc_relative */ 2009 0, /* bitpos */ 2010 complain_overflow_dont,/* complain_on_overflow */ 2011 nds32_elf_ignore_reloc,/* special_function */ 2012 "R_NDS32_RELAX_ENTRY", /* name */ 2013 FALSE, /* partial_inplace */ 2014 0xffffffff, /* src_mask */ 2015 0xffffffff, /* dst_mask */ 2016 FALSE), /* pcrel_offset */ 2017 HOWTO (R_NDS32_GOT_SUFF, /* type */ 2018 0, /* rightshift */ 2019 2, /* size (0 = byte, 1 = short, 2 = long) */ 2020 32, /* bitsize */ 2021 FALSE, /* pc_relative */ 2022 0, /* bitpos */ 2023 complain_overflow_dont,/* complain_on_overflow */ 2024 nds32_elf_ignore_reloc,/* special_function */ 2025 "R_NDS32_GOT_SUFF", /* name */ 2026 FALSE, /* partial_inplace */ 2027 0xffffffff, /* src_mask */ 2028 0xffffffff, /* dst_mask */ 2029 FALSE), /* pcrel_offset */ 2030 HOWTO (R_NDS32_GOTOFF_SUFF, /* type */ 2031 0, /* rightshift */ 2032 2, /* size (0 = byte, 1 = short, 2 = long) */ 2033 32, /* bitsize */ 2034 FALSE, /* pc_relative */ 2035 0, /* bitpos */ 2036 complain_overflow_bitfield, /* complain_on_overflow */ 2037 nds32_elf_ignore_reloc,/* special_function */ 2038 "R_NDS32_GOTOFF_SUFF", /* name */ 2039 FALSE, /* partial_inplace */ 2040 0xffffffff, /* src_mask */ 2041 0xffffffff, /* dst_mask */ 2042 FALSE), /* pcrel_offset */ 2043 HOWTO (R_NDS32_PLT_GOT_SUFF, /* type */ 2044 0, /* rightshift */ 2045 2, /* size (0 = byte, 1 = short, 2 = long) */ 2046 32, /* bitsize */ 2047 FALSE, /* pc_relative */ 2048 0, /* bitpos */ 2049 complain_overflow_dont,/* complain_on_overflow */ 2050 nds32_elf_ignore_reloc,/* special_function */ 2051 "R_NDS32_PLT_GOT_SUFF",/* name */ 2052 FALSE, /* partial_inplace */ 2053 0xffffffff, /* src_mask */ 2054 0xffffffff, /* dst_mask */ 2055 FALSE), /* pcrel_offset */ 2056 HOWTO (R_NDS32_MULCALL_SUFF, /* type */ 2057 0, /* rightshift */ 2058 2, /* size (0 = byte, 1 = short, 2 = long) */ 2059 32, /* bitsize */ 2060 FALSE, /* pc_relative */ 2061 0, /* bitpos */ 2062 complain_overflow_dont,/* complain_on_overflow */ 2063 nds32_elf_ignore_reloc,/* special_function */ 2064 "R_NDS32_MULCALL_SUFF",/* name */ 2065 FALSE, /* partial_inplace */ 2066 0xffffffff, /* src_mask */ 2067 0xffffffff, /* dst_mask */ 2068 FALSE), /* pcrel_offset */ 2069 HOWTO (R_NDS32_PTR, /* type */ 2070 0, /* rightshift */ 2071 2, /* size (0 = byte, 1 = short, 2 = long) */ 2072 32, /* bitsize */ 2073 FALSE, /* pc_relative */ 2074 0, /* bitpos */ 2075 complain_overflow_dont,/* complain_on_overflow */ 2076 nds32_elf_ignore_reloc,/* special_function */ 2077 "R_NDS32_PTR", /* name */ 2078 FALSE, /* partial_inplace */ 2079 0xffffffff, /* src_mask */ 2080 0xffffffff, /* dst_mask */ 2081 FALSE), /* pcrel_offset */ 2082 HOWTO (R_NDS32_PTR_COUNT, /* type */ 2083 0, /* rightshift */ 2084 2, /* size (0 = byte, 1 = short, 2 = long) */ 2085 32, /* bitsize */ 2086 FALSE, /* pc_relative */ 2087 0, /* bitpos */ 2088 complain_overflow_dont,/* complain_on_overflow */ 2089 nds32_elf_ignore_reloc,/* special_function */ 2090 "R_NDS32_PTR_COUNT", /* name */ 2091 FALSE, /* partial_inplace */ 2092 0xffffffff, /* src_mask */ 2093 0xffffffff, /* dst_mask */ 2094 FALSE), /* pcrel_offset */ 2095 HOWTO (R_NDS32_PTR_RESOLVED, /* type */ 2096 0, /* rightshift */ 2097 2, /* size (0 = byte, 1 = short, 2 = long) */ 2098 32, /* bitsize */ 2099 FALSE, /* pc_relative */ 2100 0, /* bitpos */ 2101 complain_overflow_dont,/* complain_on_overflow */ 2102 nds32_elf_ignore_reloc,/* special_function */ 2103 "R_NDS32_PTR_RESOLVED",/* name */ 2104 FALSE, /* partial_inplace */ 2105 0xffffffff, /* src_mask */ 2106 0xffffffff, /* dst_mask */ 2107 FALSE), /* pcrel_offset */ 2108 HOWTO (R_NDS32_PLTBLOCK, /* type */ 2109 0, /* rightshift */ 2110 2, /* size (0 = byte, 1 = short, 2 = long) */ 2111 32, /* bitsize */ 2112 FALSE, /* pc_relative */ 2113 0, /* bitpos */ 2114 complain_overflow_dont,/* complain_on_overflow */ 2115 nds32_elf_ignore_reloc,/* special_function */ 2116 "R_NDS32_PLTBLOCK", /* name */ 2117 FALSE, /* partial_inplace */ 2118 0xffffffff, /* src_mask */ 2119 0xffffffff, /* dst_mask */ 2120 FALSE), /* pcrel_offset */ 2121 HOWTO (R_NDS32_RELAX_REGION_BEGIN, /* type */ 2122 0, /* rightshift */ 2123 2, /* size (0 = byte, 1 = short, 2 = long) */ 2124 32, /* bitsize */ 2125 FALSE, /* pc_relative */ 2126 0, /* bitpos */ 2127 complain_overflow_dont,/* complain_on_overflow */ 2128 nds32_elf_ignore_reloc,/* special_function */ 2129 "R_NDS32_RELAX_REGION_BEGIN", /* name */ 2130 FALSE, /* partial_inplace */ 2131 0xffffffff, /* src_mask */ 2132 0xffffffff, /* dst_mask */ 2133 FALSE), /* pcrel_offset */ 2134 HOWTO (R_NDS32_RELAX_REGION_END, /* type */ 2135 0, /* rightshift */ 2136 2, /* size (0 = byte, 1 = short, 2 = long) */ 2137 32, /* bitsize */ 2138 FALSE, /* pc_relative */ 2139 0, /* bitpos */ 2140 complain_overflow_dont,/* complain_on_overflow */ 2141 nds32_elf_ignore_reloc,/* special_function */ 2142 "R_NDS32_RELAX_REGION_END", /* name */ 2143 FALSE, /* partial_inplace */ 2144 0xffffffff, /* src_mask */ 2145 0xffffffff, /* dst_mask */ 2146 FALSE), /* pcrel_offset */ 2147 HOWTO (R_NDS32_MINUEND, /* type */ 2148 0, /* rightshift */ 2149 2, /* size (0 = byte, 1 = short, 2 = long) */ 2150 32, /* bitsize */ 2151 FALSE, /* pc_relative */ 2152 0, /* bitpos */ 2153 complain_overflow_dont,/* complain_on_overflow */ 2154 nds32_elf_ignore_reloc,/* special_function */ 2155 "R_NDS32_MINUEND", /* name */ 2156 FALSE, /* partial_inplace */ 2157 0xffffffff, /* src_mask */ 2158 0xffffffff, /* dst_mask */ 2159 FALSE), /* pcrel_offset */ 2160 HOWTO (R_NDS32_SUBTRAHEND, /* type */ 2161 0, /* rightshift */ 2162 2, /* size (0 = byte, 1 = short, 2 = long) */ 2163 32, /* bitsize */ 2164 FALSE, /* pc_relative */ 2165 0, /* bitpos */ 2166 complain_overflow_dont,/* complain_on_overflow */ 2167 nds32_elf_ignore_reloc,/* special_function */ 2168 "R_NDS32_SUBTRAHEND", /* name */ 2169 FALSE, /* partial_inplace */ 2170 0xffffffff, /* src_mask */ 2171 0xffffffff, /* dst_mask */ 2172 FALSE), /* pcrel_offset */ 2173 HOWTO (R_NDS32_DIFF8, /* type */ 2174 0, /* rightshift */ 2175 0, /* size (0 = byte, 1 = short, 2 = long) */ 2176 8, /* bitsize */ 2177 FALSE, /* pc_relative */ 2178 0, /* bitpos */ 2179 complain_overflow_dont,/* complain_on_overflow */ 2180 nds32_elf_ignore_reloc,/* special_function */ 2181 "R_NDS32_DIFF8", /* name */ 2182 FALSE, /* partial_inplace */ 2183 0x000000ff, /* src_mask */ 2184 0x000000ff, /* dst_mask */ 2185 FALSE), /* pcrel_offset */ 2186 HOWTO (R_NDS32_DIFF16, /* type */ 2187 0, /* rightshift */ 2188 1, /* size (0 = byte, 1 = short, 2 = long) */ 2189 16, /* bitsize */ 2190 FALSE, /* pc_relative */ 2191 0, /* bitpos */ 2192 complain_overflow_dont,/* complain_on_overflow */ 2193 nds32_elf_ignore_reloc,/* special_function */ 2194 "R_NDS32_DIFF16", /* name */ 2195 FALSE, /* partial_inplace */ 2196 0x0000ffff, /* src_mask */ 2197 0x0000ffff, /* dst_mask */ 2198 FALSE), /* pcrel_offset */ 2199 HOWTO (R_NDS32_DIFF32, /* type */ 2200 0, /* rightshift */ 2201 2, /* size (0 = byte, 1 = short, 2 = long) */ 2202 32, /* bitsize */ 2203 FALSE, /* pc_relative */ 2204 0, /* bitpos */ 2205 complain_overflow_dont,/* complain_on_overflow */ 2206 nds32_elf_ignore_reloc,/* special_function */ 2207 "R_NDS32_DIFF32", /* name */ 2208 FALSE, /* partial_inplace */ 2209 0xffffffff, /* src_mask */ 2210 0xffffffff, /* dst_mask */ 2211 FALSE), /* pcrel_offset */ 2212 HOWTO (R_NDS32_DIFF_ULEB128, /* type */ 2213 0, /* rightshift */ 2214 0, /* size (0 = byte, 1 = short, 2 = long) */ 2215 0, /* bitsize */ 2216 FALSE, /* pc_relative */ 2217 0, /* bitpos */ 2218 complain_overflow_dont,/* complain_on_overflow */ 2219 nds32_elf_ignore_reloc,/* special_function */ 2220 "R_NDS32_DIFF_ULEB128",/* name */ 2221 FALSE, /* partial_inplace */ 2222 0xffffffff, /* src_mask */ 2223 0xffffffff, /* dst_mask */ 2224 FALSE), /* pcrel_offset */ 2225 HOWTO (R_NDS32_DATA, /* type */ 2226 0, /* rightshift */ 2227 2, /* size (0 = byte, 1 = short, 2 = long) */ 2228 32, /* bitsize */ 2229 FALSE, /* pc_relative */ 2230 0, /* bitpos */ 2231 complain_overflow_dont,/* complain_on_overflow */ 2232 nds32_elf_ignore_reloc,/* special_function */ 2233 "R_NDS32_DATA", /* name */ 2234 FALSE, /* partial_inplace */ 2235 0xffffffff, /* src_mask */ 2236 0xffffffff, /* dst_mask */ 2237 FALSE), /* pcrel_offset */ 2238 HOWTO (R_NDS32_TRAN, /* type */ 2239 0, /* rightshift */ 2240 2, /* size (0 = byte, 1 = short, 2 = long) */ 2241 32, /* bitsize */ 2242 FALSE, /* pc_relative */ 2243 0, /* bitpos */ 2244 complain_overflow_dont,/* complain_on_overflow */ 2245 nds32_elf_ignore_reloc,/* special_function */ 2246 "R_NDS32_TRAN", /* name */ 2247 FALSE, /* partial_inplace */ 2248 0xffffffff, /* src_mask */ 2249 0xffffffff, /* dst_mask */ 2250 FALSE), /* pcrel_offset */ 2251 HOWTO (R_NDS32_TLS_LE_ADD, /* type */ 2252 0, /* rightshift */ 2253 2, /* size (0 = byte, 1 = short, 2 = long) */ 2254 32, /* bitsize */ 2255 FALSE, /* pc_relative */ 2256 0, /* bitpos */ 2257 complain_overflow_dont, /* complain_on_overflow */ 2258 nds32_elf_ignore_reloc, /* special_function */ 2259 "R_NDS32_TLS_LE_ADD", /* name */ 2260 FALSE, /* partial_inplace */ 2261 0xffffffff, /* src_mask */ 2262 0xffffffff, /* dst_mask */ 2263 FALSE), /* pcrel_offset */ 2264 HOWTO (R_NDS32_TLS_LE_LS, /* type */ 2265 0, /* rightshift */ 2266 2, /* size (0 = byte, 1 = short, 2 = long) */ 2267 32, /* bitsize */ 2268 FALSE, /* pc_relative */ 2269 0, /* bitpos */ 2270 complain_overflow_dont, /* complain_on_overflow */ 2271 nds32_elf_ignore_reloc, /* special_function */ 2272 "R_NDS32_TLS_LE_LS", /* name */ 2273 FALSE, /* partial_inplace */ 2274 0xffffffff, /* src_mask */ 2275 0xffffffff, /* dst_mask */ 2276 FALSE), /* pcrel_offset */ 2277 HOWTO (R_NDS32_EMPTY, /* type */ 2278 0, /* rightshift */ 2279 2, /* size (0 = byte, 1 = short, 2 = long) */ 2280 32, /* bitsize */ 2281 FALSE, /* pc_relative */ 2282 0, /* bitpos */ 2283 complain_overflow_dont, /* complain_on_overflow */ 2284 nds32_elf_ignore_reloc, /* special_function */ 2285 "R_NDS32_EMPTY", /* name */ 2286 FALSE, /* partial_inplace */ 2287 0xffffffff, /* src_mask */ 2288 0xffffffff, /* dst_mask */ 2289 FALSE), /* pcrel_offset */ 2290}; 2291 2292 2293/* nds32_insertion_sort sorts an array with nmemb elements of size size. 2294 This prototype is the same as qsort (). */ 2295 2296void 2297nds32_insertion_sort (void *base, size_t nmemb, size_t size, 2298 int (*compar) (const void *lhs, const void *rhs)) 2299{ 2300 char *ptr = (char *) base; 2301 int i, j; 2302 char *tmp = alloca (size); 2303 2304 /* If i is less than j, i is inserted before j. 2305 2306 |---- j ----- i --------------| 2307 \ / \ / 2308 sorted unsorted 2309 */ 2310 2311 for (i = 1; i < (int) nmemb; i++) 2312 { 2313 for (j = (i - 1); j >= 0; j--) 2314 if (compar (ptr + i * size, ptr + j * size) >= 0) 2315 break; 2316 2317 j++; 2318 2319 if (i == j) 2320 continue; /* i is in order. */ 2321 2322 memcpy (tmp, ptr + i * size, size); 2323 memmove (ptr + (j + 1) * size, ptr + j * size, (i - j) * size); 2324 memcpy (ptr + j * size, tmp, size); 2325 } 2326} 2327 2328/* Sort relocation by r_offset. 2329 2330 We didn't use qsort () in stdlib, because quick-sort is not a stable sorting 2331 algorithm. Relocations at the same r_offset must keep their order. 2332 For example, RELAX_ENTRY must be the very first relocation entry. 2333 2334 Currently, this function implements insertion-sort. 2335 2336 FIXME: If we already sort them in assembler, why bother sort them 2337 here again? */ 2338 2339static int 2340compar_reloc (const void *lhs, const void *rhs) 2341{ 2342 const Elf_Internal_Rela *l = (const Elf_Internal_Rela *) lhs; 2343 const Elf_Internal_Rela *r = (const Elf_Internal_Rela *) rhs; 2344 2345 if (l->r_offset > r->r_offset) 2346 return 1; 2347 else if (l->r_offset == r->r_offset) 2348 return 0; 2349 else 2350 return -1; 2351} 2352 2353/* Functions listed below are only used for old relocs. 2354 * nds32_elf_9_pcrel_reloc 2355 * nds32_elf_do_9_pcrel_reloc 2356 * nds32_elf_hi20_reloc 2357 * nds32_elf_relocate_hi20 2358 * nds32_elf_lo12_reloc 2359 * nds32_elf_sda15_reloc 2360 * nds32_elf_generic_reloc 2361 */ 2362 2363/* Handle the R_NDS32_9_PCREL & R_NDS32_9_PCREL_RELA reloc. */ 2364 2365static bfd_reloc_status_type 2366nds32_elf_9_pcrel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2367 void *data, asection *input_section, bfd *output_bfd, 2368 char **error_message ATTRIBUTE_UNUSED) 2369{ 2370 /* This part is from bfd_elf_generic_reloc. */ 2371 if (output_bfd != (bfd *) NULL 2372 && (symbol->flags & BSF_SECTION_SYM) == 0 2373 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 2374 { 2375 reloc_entry->address += input_section->output_offset; 2376 return bfd_reloc_ok; 2377 } 2378 2379 if (output_bfd != NULL) 2380 { 2381 /* FIXME: See bfd_perform_relocation. Is this right? */ 2382 return bfd_reloc_continue; 2383 } 2384 2385 return nds32_elf_do_9_pcrel_reloc (abfd, reloc_entry->howto, 2386 input_section, 2387 data, reloc_entry->address, 2388 symbol->section, 2389 (symbol->value 2390 + symbol->section->output_section->vma 2391 + symbol->section->output_offset), 2392 reloc_entry->addend); 2393} 2394 2395/* Utility to actually perform an R_NDS32_9_PCREL reloc. */ 2396#define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1) 2397 2398static bfd_reloc_status_type 2399nds32_elf_do_9_pcrel_reloc (bfd *abfd, reloc_howto_type *howto, 2400 asection *input_section, bfd_byte *data, 2401 bfd_vma offset, 2402 asection *symbol_section ATTRIBUTE_UNUSED, 2403 bfd_vma symbol_value, bfd_vma addend) 2404{ 2405 bfd_signed_vma relocation; 2406 unsigned short x; 2407 bfd_reloc_status_type status; 2408 2409 /* Sanity check the address (offset in section). */ 2410 if (offset > bfd_get_section_limit (abfd, input_section)) 2411 return bfd_reloc_outofrange; 2412 2413 relocation = symbol_value + addend; 2414 /* Make it pc relative. */ 2415 relocation -= (input_section->output_section->vma 2416 + input_section->output_offset); 2417 /* These jumps mask off the lower two bits of the current address 2418 before doing pcrel calculations. */ 2419 relocation -= (offset & -(bfd_vma) 2); 2420 2421 if (relocation < -ACCURATE_8BIT_S1 || relocation >= ACCURATE_8BIT_S1) 2422 status = bfd_reloc_overflow; 2423 else 2424 status = bfd_reloc_ok; 2425 2426 x = bfd_getb16 (data + offset); 2427 2428 relocation >>= howto->rightshift; 2429 relocation <<= howto->bitpos; 2430 x = (x & ~howto->dst_mask) 2431 | (((x & howto->src_mask) + relocation) & howto->dst_mask); 2432 2433 bfd_putb16 ((bfd_vma) x, data + offset); 2434 2435 return status; 2436} 2437 2438/* Handle the R_NDS32_HI20_[SU]LO relocs. 2439 HI20_SLO is for the add3 and load/store with displacement instructions. 2440 HI20 is for the or3 instruction. 2441 For R_NDS32_HI20_SLO, the lower 16 bits are sign extended when added to 2442 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then 2443 we must add one to the high 16 bytes (which will get subtracted off when 2444 the low 16 bits are added). 2445 These relocs have to be done in combination with an R_NDS32_LO12 reloc 2446 because there is a carry from the LO12 to the HI20. Here we just save 2447 the information we need; we do the actual relocation when we see the LO12. 2448 This code is copied from the elf32-mips.c. We also support an arbitrary 2449 number of HI20 relocs to be associated with a single LO12 reloc. The 2450 assembler sorts the relocs to ensure each HI20 immediately precedes its 2451 LO12. However if there are multiple copies, the assembler may not find 2452 the real LO12 so it picks the first one it finds. */ 2453 2454struct nds32_hi20 2455{ 2456 struct nds32_hi20 *next; 2457 bfd_byte *addr; 2458 bfd_vma addend; 2459}; 2460 2461static struct nds32_hi20 *nds32_hi20_list; 2462 2463static bfd_reloc_status_type 2464nds32_elf_hi20_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, 2465 asymbol *symbol, void *data, asection *input_section, 2466 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) 2467{ 2468 bfd_reloc_status_type ret; 2469 bfd_vma relocation; 2470 struct nds32_hi20 *n; 2471 2472 /* This part is from bfd_elf_generic_reloc. 2473 If we're relocating, and this an external symbol, we don't want 2474 to change anything. */ 2475 if (output_bfd != (bfd *) NULL 2476 && (symbol->flags & BSF_SECTION_SYM) == 0 && reloc_entry->addend == 0) 2477 { 2478 reloc_entry->address += input_section->output_offset; 2479 return bfd_reloc_ok; 2480 } 2481 2482 /* Sanity check the address (offset in section). */ 2483 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 2484 return bfd_reloc_outofrange; 2485 2486 ret = bfd_reloc_ok; 2487 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) 2488 ret = bfd_reloc_undefined; 2489 2490 if (bfd_is_com_section (symbol->section)) 2491 relocation = 0; 2492 else 2493 relocation = symbol->value; 2494 2495 relocation += symbol->section->output_section->vma; 2496 relocation += symbol->section->output_offset; 2497 relocation += reloc_entry->addend; 2498 2499 /* Save the information, and let LO12 do the actual relocation. */ 2500 n = (struct nds32_hi20 *) bfd_malloc ((bfd_size_type) sizeof *n); 2501 if (n == NULL) 2502 return bfd_reloc_outofrange; 2503 2504 n->addr = (bfd_byte *) data + reloc_entry->address; 2505 n->addend = relocation; 2506 n->next = nds32_hi20_list; 2507 nds32_hi20_list = n; 2508 2509 if (output_bfd != (bfd *) NULL) 2510 reloc_entry->address += input_section->output_offset; 2511 2512 return ret; 2513} 2514 2515/* Handle an NDS32 ELF HI20 reloc. */ 2516 2517static void 2518nds32_elf_relocate_hi20 (bfd *input_bfd ATTRIBUTE_UNUSED, 2519 int type ATTRIBUTE_UNUSED, Elf_Internal_Rela *relhi, 2520 Elf_Internal_Rela *rello, bfd_byte *contents, 2521 bfd_vma addend) 2522{ 2523 unsigned long insn; 2524 bfd_vma addlo; 2525 2526 insn = bfd_getb32 (contents + relhi->r_offset); 2527 2528 addlo = bfd_getb32 (contents + rello->r_offset); 2529 addlo &= 0xfff; 2530 2531 addend += ((insn & 0xfffff) << 20) + addlo; 2532 2533 insn = (insn & 0xfff00000) | ((addend >> 12) & 0xfffff); 2534 bfd_putb32 (insn, contents + relhi->r_offset); 2535} 2536 2537/* Do an R_NDS32_LO12 relocation. This is a straightforward 12 bit 2538 inplace relocation; this function exists in order to do the 2539 R_NDS32_HI20_[SU]LO relocation described above. */ 2540 2541static bfd_reloc_status_type 2542nds32_elf_lo12_reloc (bfd *input_bfd, arelent *reloc_entry, asymbol *symbol, 2543 void *data, asection *input_section, bfd *output_bfd, 2544 char **error_message) 2545{ 2546 /* This part is from bfd_elf_generic_reloc. 2547 If we're relocating, and this an external symbol, we don't want 2548 to change anything. */ 2549 if (output_bfd != NULL && (symbol->flags & BSF_SECTION_SYM) == 0 2550 && reloc_entry->addend == 0) 2551 { 2552 reloc_entry->address += input_section->output_offset; 2553 return bfd_reloc_ok; 2554 } 2555 2556 if (nds32_hi20_list != NULL) 2557 { 2558 struct nds32_hi20 *l; 2559 2560 l = nds32_hi20_list; 2561 while (l != NULL) 2562 { 2563 unsigned long insn; 2564 unsigned long val; 2565 unsigned long vallo; 2566 struct nds32_hi20 *next; 2567 2568 /* Do the HI20 relocation. Note that we actually don't need 2569 to know anything about the LO12 itself, except where to 2570 find the low 12 bits of the addend needed by the LO12. */ 2571 insn = bfd_getb32 (l->addr); 2572 vallo = bfd_getb32 ((bfd_byte *) data + reloc_entry->address); 2573 vallo &= 0xfff; 2574 switch (reloc_entry->howto->type) 2575 { 2576 case R_NDS32_LO12S3: 2577 vallo <<= 3; 2578 break; 2579 2580 case R_NDS32_LO12S2: 2581 vallo <<= 2; 2582 break; 2583 2584 case R_NDS32_LO12S1: 2585 vallo <<= 1; 2586 break; 2587 2588 case R_NDS32_LO12S0: 2589 vallo <<= 0; 2590 break; 2591 } 2592 2593 val = ((insn & 0xfffff) << 12) + vallo; 2594 val += l->addend; 2595 2596 insn = (insn & ~(bfd_vma) 0xfffff) | ((val >> 12) & 0xfffff); 2597 bfd_putb32 ((bfd_vma) insn, l->addr); 2598 2599 next = l->next; 2600 free (l); 2601 l = next; 2602 } 2603 2604 nds32_hi20_list = NULL; 2605 } 2606 2607 /* Now do the LO12 reloc in the usual way. 2608 ??? It would be nice to call bfd_elf_generic_reloc here, 2609 but we have partial_inplace set. bfd_elf_generic_reloc will 2610 pass the handling back to bfd_install_relocation which will install 2611 a section relative addend which is wrong. */ 2612 return nds32_elf_generic_reloc (input_bfd, reloc_entry, symbol, data, 2613 input_section, output_bfd, error_message); 2614} 2615 2616/* Do generic partial_inplace relocation. 2617 This is a local replacement for bfd_elf_generic_reloc. */ 2618 2619static bfd_reloc_status_type 2620nds32_elf_generic_reloc (bfd *input_bfd, arelent *reloc_entry, 2621 asymbol *symbol, void *data, asection *input_section, 2622 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) 2623{ 2624 bfd_reloc_status_type ret; 2625 bfd_vma relocation; 2626 bfd_byte *inplace_address; 2627 2628 /* This part is from bfd_elf_generic_reloc. 2629 If we're relocating, and this an external symbol, we don't want 2630 to change anything. */ 2631 if (output_bfd != NULL && (symbol->flags & BSF_SECTION_SYM) == 0 2632 && reloc_entry->addend == 0) 2633 { 2634 reloc_entry->address += input_section->output_offset; 2635 return bfd_reloc_ok; 2636 } 2637 2638 /* Now do the reloc in the usual way. 2639 ??? It would be nice to call bfd_elf_generic_reloc here, 2640 but we have partial_inplace set. bfd_elf_generic_reloc will 2641 pass the handling back to bfd_install_relocation which will install 2642 a section relative addend which is wrong. */ 2643 2644 /* Sanity check the address (offset in section). */ 2645 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) 2646 return bfd_reloc_outofrange; 2647 2648 ret = bfd_reloc_ok; 2649 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) 2650 ret = bfd_reloc_undefined; 2651 2652 if (bfd_is_com_section (symbol->section) || output_bfd != (bfd *) NULL) 2653 relocation = 0; 2654 else 2655 relocation = symbol->value; 2656 2657 /* Only do this for a final link. */ 2658 if (output_bfd == (bfd *) NULL) 2659 { 2660 relocation += symbol->section->output_section->vma; 2661 relocation += symbol->section->output_offset; 2662 } 2663 2664 relocation += reloc_entry->addend; 2665 switch (reloc_entry->howto->type) 2666 { 2667 case R_NDS32_LO12S3: 2668 relocation >>= 3; 2669 break; 2670 2671 case R_NDS32_LO12S2: 2672 relocation >>= 2; 2673 break; 2674 2675 case R_NDS32_LO12S1: 2676 relocation >>= 1; 2677 break; 2678 2679 case R_NDS32_LO12S0: 2680 default: 2681 relocation >>= 0; 2682 break; 2683 } 2684 2685 inplace_address = (bfd_byte *) data + reloc_entry->address; 2686 2687#define DOIT(x) \ 2688 x = ((x & ~reloc_entry->howto->dst_mask) | \ 2689 (((x & reloc_entry->howto->src_mask) + relocation) & \ 2690 reloc_entry->howto->dst_mask)) 2691 2692 switch (reloc_entry->howto->size) 2693 { 2694 case 1: 2695 { 2696 short x = bfd_getb16 (inplace_address); 2697 2698 DOIT (x); 2699 bfd_putb16 ((bfd_vma) x, inplace_address); 2700 } 2701 break; 2702 case 2: 2703 { 2704 unsigned long x = bfd_getb32 (inplace_address); 2705 2706 DOIT (x); 2707 bfd_putb32 ((bfd_vma) x, inplace_address); 2708 } 2709 break; 2710 default: 2711 BFD_ASSERT (0); 2712 } 2713 2714 if (output_bfd != (bfd *) NULL) 2715 reloc_entry->address += input_section->output_offset; 2716 2717 return ret; 2718} 2719 2720/* Handle the R_NDS32_SDA15 reloc. 2721 This reloc is used to compute the address of objects in the small data area 2722 and to perform loads and stores from that area. 2723 The lower 15 bits are sign extended and added to the register specified 2724 in the instruction, which is assumed to point to _SDA_BASE_. 2725 2726 Since the lower 15 bits offset is left-shifted 0, 1 or 2 bits depending on 2727 the access size, this must be taken care of. */ 2728 2729static bfd_reloc_status_type 2730nds32_elf_sda15_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, 2731 asymbol *symbol, void *data ATTRIBUTE_UNUSED, 2732 asection *input_section, bfd *output_bfd, 2733 char **error_message ATTRIBUTE_UNUSED) 2734{ 2735 /* This part is from bfd_elf_generic_reloc. */ 2736 if (output_bfd != (bfd *) NULL 2737 && (symbol->flags & BSF_SECTION_SYM) == 0 2738 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 2739 { 2740 reloc_entry->address += input_section->output_offset; 2741 return bfd_reloc_ok; 2742 } 2743 2744 if (output_bfd != NULL) 2745 { 2746 /* FIXME: See bfd_perform_relocation. Is this right? */ 2747 return bfd_reloc_continue; 2748 } 2749 2750 /* FIXME: not sure what to do here yet. But then again, the linker 2751 may never call us. */ 2752 abort (); 2753} 2754 2755/* nds32_elf_ignore_reloc is the special function for 2756 relocation types which don't need to be relocated 2757 like relaxation relocation types. 2758 This function simply return bfd_reloc_ok when it is 2759 invoked. */ 2760 2761static bfd_reloc_status_type 2762nds32_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, 2763 asymbol *symbol ATTRIBUTE_UNUSED, 2764 void *data ATTRIBUTE_UNUSED, asection *input_section, 2765 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) 2766{ 2767 if (output_bfd != NULL) 2768 reloc_entry->address += input_section->output_offset; 2769 2770 return bfd_reloc_ok; 2771} 2772 2773 2774/* Map BFD reloc types to NDS32 ELF reloc types. */ 2775 2776struct nds32_reloc_map_entry 2777{ 2778 bfd_reloc_code_real_type bfd_reloc_val; 2779 unsigned char elf_reloc_val; 2780}; 2781 2782static const struct nds32_reloc_map_entry nds32_reloc_map[] = 2783{ 2784 {BFD_RELOC_NONE, R_NDS32_NONE}, 2785 {BFD_RELOC_16, R_NDS32_16_RELA}, 2786 {BFD_RELOC_32, R_NDS32_32_RELA}, 2787 {BFD_RELOC_NDS32_20, R_NDS32_20_RELA}, 2788 {BFD_RELOC_NDS32_5, R_NDS32_5_RELA}, 2789 {BFD_RELOC_NDS32_9_PCREL, R_NDS32_9_PCREL_RELA}, 2790 {BFD_RELOC_NDS32_WORD_9_PCREL, R_NDS32_WORD_9_PCREL_RELA}, 2791 {BFD_RELOC_NDS32_15_PCREL, R_NDS32_15_PCREL_RELA}, 2792 {BFD_RELOC_NDS32_17_PCREL, R_NDS32_17_PCREL_RELA}, 2793 {BFD_RELOC_NDS32_25_PCREL, R_NDS32_25_PCREL_RELA}, 2794 {BFD_RELOC_NDS32_10_UPCREL, R_NDS32_10_UPCREL_RELA}, 2795 {BFD_RELOC_NDS32_HI20, R_NDS32_HI20_RELA}, 2796 {BFD_RELOC_NDS32_LO12S3, R_NDS32_LO12S3_RELA}, 2797 {BFD_RELOC_NDS32_LO12S2, R_NDS32_LO12S2_RELA}, 2798 {BFD_RELOC_NDS32_LO12S1, R_NDS32_LO12S1_RELA}, 2799 {BFD_RELOC_NDS32_LO12S0, R_NDS32_LO12S0_RELA}, 2800 {BFD_RELOC_NDS32_LO12S0_ORI, R_NDS32_LO12S0_ORI_RELA}, 2801 {BFD_RELOC_NDS32_SDA15S3, R_NDS32_SDA15S3_RELA}, 2802 {BFD_RELOC_NDS32_SDA15S2, R_NDS32_SDA15S2_RELA}, 2803 {BFD_RELOC_NDS32_SDA15S1, R_NDS32_SDA15S1_RELA}, 2804 {BFD_RELOC_NDS32_SDA15S0, R_NDS32_SDA15S0_RELA}, 2805 {BFD_RELOC_VTABLE_INHERIT, R_NDS32_RELA_GNU_VTINHERIT}, 2806 {BFD_RELOC_VTABLE_ENTRY, R_NDS32_RELA_GNU_VTENTRY}, 2807 2808 {BFD_RELOC_NDS32_GOT20, R_NDS32_GOT20}, 2809 {BFD_RELOC_NDS32_9_PLTREL, R_NDS32_9_PLTREL}, 2810 {BFD_RELOC_NDS32_25_PLTREL, R_NDS32_25_PLTREL}, 2811 {BFD_RELOC_NDS32_COPY, R_NDS32_COPY}, 2812 {BFD_RELOC_NDS32_GLOB_DAT, R_NDS32_GLOB_DAT}, 2813 {BFD_RELOC_NDS32_JMP_SLOT, R_NDS32_JMP_SLOT}, 2814 {BFD_RELOC_NDS32_RELATIVE, R_NDS32_RELATIVE}, 2815 {BFD_RELOC_NDS32_GOTOFF, R_NDS32_GOTOFF}, 2816 {BFD_RELOC_NDS32_GOTPC20, R_NDS32_GOTPC20}, 2817 {BFD_RELOC_NDS32_GOT_HI20, R_NDS32_GOT_HI20}, 2818 {BFD_RELOC_NDS32_GOT_LO12, R_NDS32_GOT_LO12}, 2819 {BFD_RELOC_NDS32_GOT_LO15, R_NDS32_GOT_LO15}, 2820 {BFD_RELOC_NDS32_GOT_LO19, R_NDS32_GOT_LO19}, 2821 {BFD_RELOC_NDS32_GOTPC_HI20, R_NDS32_GOTPC_HI20}, 2822 {BFD_RELOC_NDS32_GOTPC_LO12, R_NDS32_GOTPC_LO12}, 2823 {BFD_RELOC_NDS32_GOTOFF_HI20, R_NDS32_GOTOFF_HI20}, 2824 {BFD_RELOC_NDS32_GOTOFF_LO12, R_NDS32_GOTOFF_LO12}, 2825 {BFD_RELOC_NDS32_GOTOFF_LO15, R_NDS32_GOTOFF_LO15}, 2826 {BFD_RELOC_NDS32_GOTOFF_LO19, R_NDS32_GOTOFF_LO19}, 2827 {BFD_RELOC_NDS32_INSN16, R_NDS32_INSN16}, 2828 {BFD_RELOC_NDS32_LABEL, R_NDS32_LABEL}, 2829 {BFD_RELOC_NDS32_LONGCALL1, R_NDS32_LONGCALL1}, 2830 {BFD_RELOC_NDS32_LONGCALL2, R_NDS32_LONGCALL2}, 2831 {BFD_RELOC_NDS32_LONGCALL3, R_NDS32_LONGCALL3}, 2832 {BFD_RELOC_NDS32_LONGCALL4, R_NDS32_LONGCALL4}, 2833 {BFD_RELOC_NDS32_LONGCALL5, R_NDS32_LONGCALL5}, 2834 {BFD_RELOC_NDS32_LONGCALL6, R_NDS32_LONGCALL6}, 2835 {BFD_RELOC_NDS32_LONGJUMP1, R_NDS32_LONGJUMP1}, 2836 {BFD_RELOC_NDS32_LONGJUMP2, R_NDS32_LONGJUMP2}, 2837 {BFD_RELOC_NDS32_LONGJUMP3, R_NDS32_LONGJUMP3}, 2838 {BFD_RELOC_NDS32_LONGJUMP4, R_NDS32_LONGJUMP4}, 2839 {BFD_RELOC_NDS32_LONGJUMP5, R_NDS32_LONGJUMP5}, 2840 {BFD_RELOC_NDS32_LONGJUMP6, R_NDS32_LONGJUMP6}, 2841 {BFD_RELOC_NDS32_LONGJUMP7, R_NDS32_LONGJUMP7}, 2842 {BFD_RELOC_NDS32_LOADSTORE, R_NDS32_LOADSTORE}, 2843 {BFD_RELOC_NDS32_9_FIXED, R_NDS32_9_FIXED_RELA}, 2844 {BFD_RELOC_NDS32_15_FIXED, R_NDS32_15_FIXED_RELA}, 2845 {BFD_RELOC_NDS32_17_FIXED, R_NDS32_17_FIXED_RELA}, 2846 {BFD_RELOC_NDS32_25_FIXED, R_NDS32_25_FIXED_RELA}, 2847 {BFD_RELOC_NDS32_PLTREL_HI20, R_NDS32_PLTREL_HI20}, 2848 {BFD_RELOC_NDS32_PLTREL_LO12, R_NDS32_PLTREL_LO12}, 2849 {BFD_RELOC_NDS32_PLT_GOTREL_HI20, R_NDS32_PLT_GOTREL_HI20}, 2850 {BFD_RELOC_NDS32_PLT_GOTREL_LO12, R_NDS32_PLT_GOTREL_LO12}, 2851 {BFD_RELOC_NDS32_PLT_GOTREL_LO15, R_NDS32_PLT_GOTREL_LO15}, 2852 {BFD_RELOC_NDS32_PLT_GOTREL_LO19, R_NDS32_PLT_GOTREL_LO19}, 2853 {BFD_RELOC_NDS32_PLT_GOTREL_LO20, R_NDS32_PLT_GOTREL_LO20}, 2854 {BFD_RELOC_NDS32_SDA12S2_DP, R_NDS32_SDA12S2_DP_RELA}, 2855 {BFD_RELOC_NDS32_SDA12S2_SP, R_NDS32_SDA12S2_SP_RELA}, 2856 {BFD_RELOC_NDS32_LO12S2_DP, R_NDS32_LO12S2_DP_RELA}, 2857 {BFD_RELOC_NDS32_LO12S2_SP, R_NDS32_LO12S2_SP_RELA}, 2858 {BFD_RELOC_NDS32_SDA16S3, R_NDS32_SDA16S3_RELA}, 2859 {BFD_RELOC_NDS32_SDA17S2, R_NDS32_SDA17S2_RELA}, 2860 {BFD_RELOC_NDS32_SDA18S1, R_NDS32_SDA18S1_RELA}, 2861 {BFD_RELOC_NDS32_SDA19S0, R_NDS32_SDA19S0_RELA}, 2862 {BFD_RELOC_NDS32_SDA_FP7U2_RELA, R_NDS32_SDA_FP7U2_RELA}, 2863 {BFD_RELOC_NDS32_DWARF2_OP1, R_NDS32_DWARF2_OP1_RELA}, 2864 {BFD_RELOC_NDS32_DWARF2_OP2, R_NDS32_DWARF2_OP2_RELA}, 2865 {BFD_RELOC_NDS32_DWARF2_LEB, R_NDS32_DWARF2_LEB_RELA}, 2866 {BFD_RELOC_NDS32_UPDATE_TA, R_NDS32_UPDATE_TA_RELA}, 2867 {BFD_RELOC_NDS32_GOT_SUFF, R_NDS32_GOT_SUFF}, 2868 {BFD_RELOC_NDS32_GOTOFF_SUFF, R_NDS32_GOTOFF_SUFF}, 2869 {BFD_RELOC_NDS32_GOT15S2, R_NDS32_GOT15S2_RELA}, 2870 {BFD_RELOC_NDS32_GOT17S2, R_NDS32_GOT17S2_RELA}, 2871 {BFD_RELOC_NDS32_PTR, R_NDS32_PTR}, 2872 {BFD_RELOC_NDS32_PTR_COUNT, R_NDS32_PTR_COUNT}, 2873 {BFD_RELOC_NDS32_PLT_GOT_SUFF, R_NDS32_PLT_GOT_SUFF}, 2874 {BFD_RELOC_NDS32_PTR_RESOLVED, R_NDS32_PTR_RESOLVED}, 2875 {BFD_RELOC_NDS32_RELAX_ENTRY, R_NDS32_RELAX_ENTRY}, 2876 {BFD_RELOC_NDS32_MULCALL_SUFF, R_NDS32_MULCALL_SUFF}, 2877 {BFD_RELOC_NDS32_PLTBLOCK, R_NDS32_PLTBLOCK}, 2878 {BFD_RELOC_NDS32_RELAX_REGION_BEGIN, R_NDS32_RELAX_REGION_BEGIN}, 2879 {BFD_RELOC_NDS32_RELAX_REGION_END, R_NDS32_RELAX_REGION_END}, 2880 {BFD_RELOC_NDS32_MINUEND, R_NDS32_MINUEND}, 2881 {BFD_RELOC_NDS32_SUBTRAHEND, R_NDS32_SUBTRAHEND}, 2882 {BFD_RELOC_NDS32_EMPTY, R_NDS32_EMPTY}, 2883 2884 {BFD_RELOC_NDS32_DIFF8, R_NDS32_DIFF8}, 2885 {BFD_RELOC_NDS32_DIFF16, R_NDS32_DIFF16}, 2886 {BFD_RELOC_NDS32_DIFF32, R_NDS32_DIFF32}, 2887 {BFD_RELOC_NDS32_DIFF_ULEB128, R_NDS32_DIFF_ULEB128}, 2888 {BFD_RELOC_NDS32_25_ABS, R_NDS32_25_ABS_RELA}, 2889 {BFD_RELOC_NDS32_DATA, R_NDS32_DATA}, 2890 {BFD_RELOC_NDS32_TRAN, R_NDS32_TRAN}, 2891 {BFD_RELOC_NDS32_17IFC_PCREL, R_NDS32_17IFC_PCREL_RELA}, 2892 {BFD_RELOC_NDS32_10IFCU_PCREL, R_NDS32_10IFCU_PCREL_RELA}, 2893 {BFD_RELOC_NDS32_TLS_LE_HI20, R_NDS32_TLS_LE_HI20}, 2894 {BFD_RELOC_NDS32_TLS_LE_LO12, R_NDS32_TLS_LE_LO12}, 2895 {BFD_RELOC_NDS32_TLS_LE_ADD, R_NDS32_TLS_LE_ADD}, 2896 {BFD_RELOC_NDS32_TLS_LE_LS, R_NDS32_TLS_LE_LS}, 2897 {BFD_RELOC_NDS32_TLS_IE_HI20, R_NDS32_TLS_IE_HI20}, 2898 {BFD_RELOC_NDS32_TLS_IE_LO12S2, R_NDS32_TLS_IE_LO12S2}, 2899 {BFD_RELOC_NDS32_TLS_TPOFF, R_NDS32_TLS_TPOFF}, 2900 {BFD_RELOC_NDS32_TLS_LE_20, R_NDS32_TLS_LE_20}, 2901 {BFD_RELOC_NDS32_TLS_LE_15S0, R_NDS32_TLS_LE_15S0}, 2902 {BFD_RELOC_NDS32_TLS_LE_15S1, R_NDS32_TLS_LE_15S1}, 2903 {BFD_RELOC_NDS32_TLS_LE_15S2, R_NDS32_TLS_LE_15S2}, 2904}; 2905 2906/* Patch tag. */ 2907 2908static reloc_howto_type * 2909bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2910 const char *r_name) 2911{ 2912 unsigned int i; 2913 2914 for (i = 0; i < ARRAY_SIZE (nds32_elf_howto_table); i++) 2915 if (nds32_elf_howto_table[i].name != NULL 2916 && strcasecmp (nds32_elf_howto_table[i].name, r_name) == 0) 2917 return &nds32_elf_howto_table[i]; 2918 2919 for (i = 0; i < ARRAY_SIZE (nds32_elf_relax_howto_table); i++) 2920 if (nds32_elf_relax_howto_table[i].name != NULL 2921 && strcasecmp (nds32_elf_relax_howto_table[i].name, r_name) == 0) 2922 return &nds32_elf_relax_howto_table[i]; 2923 2924 return NULL; 2925} 2926 2927static reloc_howto_type * 2928bfd_elf32_bfd_reloc_type_table_lookup (enum elf_nds32_reloc_type code) 2929{ 2930 if (code < R_NDS32_RELAX_ENTRY) 2931 { 2932 BFD_ASSERT (code < ARRAY_SIZE (nds32_elf_howto_table)); 2933 return &nds32_elf_howto_table[code]; 2934 } 2935 else 2936 { 2937 BFD_ASSERT ((size_t) (code - R_NDS32_RELAX_ENTRY) 2938 < ARRAY_SIZE (nds32_elf_relax_howto_table)); 2939 return &nds32_elf_relax_howto_table[code - R_NDS32_RELAX_ENTRY]; 2940 } 2941} 2942 2943static reloc_howto_type * 2944bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2945 bfd_reloc_code_real_type code) 2946{ 2947 unsigned int i; 2948 2949 for (i = 0; i < ARRAY_SIZE (nds32_reloc_map); i++) 2950 { 2951 if (nds32_reloc_map[i].bfd_reloc_val == code) 2952 return bfd_elf32_bfd_reloc_type_table_lookup 2953 (nds32_reloc_map[i].elf_reloc_val); 2954 } 2955 2956 return NULL; 2957} 2958 2959/* Set the howto pointer for an NDS32 ELF reloc. */ 2960 2961static void 2962nds32_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 2963 Elf_Internal_Rela *dst) 2964{ 2965 enum elf_nds32_reloc_type r_type; 2966 2967 r_type = ELF32_R_TYPE (dst->r_info); 2968 if (r_type > R_NDS32_GNU_VTENTRY) 2969 { 2970 _bfd_error_handler (_("%A: invalid NDS32 reloc number: %d"), abfd, r_type); 2971 r_type = 0; 2972 } 2973 cache_ptr->howto = bfd_elf32_bfd_reloc_type_table_lookup (r_type); 2974} 2975 2976static void 2977nds32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 2978 Elf_Internal_Rela *dst) 2979{ 2980 BFD_ASSERT ((ELF32_R_TYPE (dst->r_info) == R_NDS32_NONE) 2981 || ((ELF32_R_TYPE (dst->r_info) > R_NDS32_GNU_VTENTRY) 2982 && (ELF32_R_TYPE (dst->r_info) < R_NDS32_max))); 2983 cache_ptr->howto = bfd_elf32_bfd_reloc_type_table_lookup (ELF32_R_TYPE (dst->r_info)); 2984} 2985 2986/* Support for core dump NOTE sections. 2987 Reference to include/linux/elfcore.h in Linux. */ 2988 2989static bfd_boolean 2990nds32_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2991{ 2992 int offset; 2993 size_t size; 2994 2995 switch (note->descsz) 2996 { 2997 case 0x114: 2998 /* Linux/NDS32 32-bit, ABI1 */ 2999 3000 /* pr_cursig */ 3001 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3002 3003 /* pr_pid */ 3004 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); 3005 3006 /* pr_reg */ 3007 offset = 72; 3008 size = 200; 3009 break; 3010 3011 case 0xfc: 3012 /* Linux/NDS32 32-bit */ 3013 3014 /* pr_cursig */ 3015 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3016 3017 /* pr_pid */ 3018 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); 3019 3020 /* pr_reg */ 3021 offset = 72; 3022 size = 176; 3023 break; 3024 3025 default: 3026 return FALSE; 3027 } 3028 3029 /* Make a ".reg" section. */ 3030 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 3031 size, note->descpos + offset); 3032} 3033 3034static bfd_boolean 3035nds32_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3036{ 3037 switch (note->descsz) 3038 { 3039 case 124: 3040 /* Linux/NDS32 */ 3041 3042 /* __kernel_uid_t, __kernel_gid_t are short on NDS32 platform. */ 3043 elf_tdata (abfd)->core->program = 3044 _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 3045 elf_tdata (abfd)->core->command = 3046 _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 3047 3048 default: 3049 return FALSE; 3050 } 3051 3052 /* Note that for some reason, a spurious space is tacked 3053 onto the end of the args in some (at least one anyway) 3054 implementations, so strip it off if it exists. */ 3055 { 3056 char *command = elf_tdata (abfd)->core->command; 3057 int n = strlen (command); 3058 3059 if (0 < n && command[n - 1] == ' ') 3060 command[n - 1] = '\0'; 3061 } 3062 3063 return TRUE; 3064} 3065 3066/* Hook called by the linker routine which adds symbols from an object 3067 file. We must handle the special NDS32 section numbers here. 3068 We also keep watching for whether we need to create the sdata special 3069 linker sections. */ 3070 3071static bfd_boolean 3072nds32_elf_add_symbol_hook (bfd *abfd, 3073 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3074 Elf_Internal_Sym *sym, 3075 const char **namep ATTRIBUTE_UNUSED, 3076 flagword *flagsp ATTRIBUTE_UNUSED, 3077 asection **secp, bfd_vma *valp) 3078{ 3079 switch (sym->st_shndx) 3080 { 3081 case SHN_COMMON: 3082 /* Common symbols less than the GP size are automatically 3083 treated as SHN_MIPS_SCOMMON symbols. */ 3084 if (sym->st_size > elf_gp_size (abfd) 3085 || ELF_ST_TYPE (sym->st_info) == STT_TLS) 3086 break; 3087 3088 /* st_value is the alignemnt constraint. 3089 That might be its actual size if it is an array or structure. */ 3090 switch (sym->st_value) 3091 { 3092 case 1: 3093 *secp = bfd_make_section_old_way (abfd, ".scommon_b"); 3094 break; 3095 case 2: 3096 *secp = bfd_make_section_old_way (abfd, ".scommon_h"); 3097 break; 3098 case 4: 3099 *secp = bfd_make_section_old_way (abfd, ".scommon_w"); 3100 break; 3101 case 8: 3102 *secp = bfd_make_section_old_way (abfd, ".scommon_d"); 3103 break; 3104 default: 3105 return TRUE; 3106 } 3107 3108 (*secp)->flags |= SEC_IS_COMMON; 3109 *valp = sym->st_size; 3110 break; 3111 } 3112 3113 return TRUE; 3114} 3115 3116 3117/* This function can figure out the best location for a base register to access 3118 data relative to this base register 3119 INPUT: 3120 sda_d0: size of first DOUBLE WORD data section 3121 sda_w0: size of first WORD data section 3122 sda_h0: size of first HALF WORD data section 3123 sda_b : size of BYTE data section 3124 sda_hi: size of second HALF WORD data section 3125 sda_w1: size of second WORD data section 3126 sda_d1: size of second DOUBLE WORD data section 3127 OUTPUT: 3128 offset (always positive) from the beginning of sda_d0 if OK 3129 a negative error value if fail 3130 NOTE: 3131 these 7 sections have to be located back to back if exist 3132 a pass in 0 value for non-existing section */ 3133 3134/* Due to the interpretation of simm15 field of load/store depending on 3135 data accessing size, the organization of base register relative data shall 3136 like the following figure 3137 ------------------------------------------- 3138 | DOUBLE WORD sized data (range +/- 128K) 3139 ------------------------------------------- 3140 | WORD sized data (range +/- 64K) 3141 ------------------------------------------- 3142 | HALF WORD sized data (range +/- 32K) 3143 ------------------------------------------- 3144 | BYTE sized data (range +/- 16K) 3145 ------------------------------------------- 3146 | HALF WORD sized data (range +/- 32K) 3147 ------------------------------------------- 3148 | WORD sized data (range +/- 64K) 3149 ------------------------------------------- 3150 | DOUBLE WORD sized data (range +/- 128K) 3151 ------------------------------------------- 3152 Its base register shall be set to access these data freely. */ 3153 3154/* We have to figure out the SDA_BASE value, so that we can adjust the 3155 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 3156 BFD. If we can't find it, we're stuck. We cache it in the ELF 3157 target data. We don't need to adjust the symbol value for an 3158 external symbol if we are producing relocatable output. */ 3159 3160static asection *sda_rela_sec = NULL; 3161 3162#define SDA_SECTION_NUM 10 3163 3164static bfd_reloc_status_type 3165nds32_elf_final_sda_base (bfd *output_bfd, struct bfd_link_info *info, 3166 bfd_vma *psb, bfd_boolean add_symbol) 3167{ 3168 int relax_fp_as_gp; 3169 struct elf_nds32_link_hash_table *table; 3170 struct bfd_link_hash_entry *h, *h2; 3171 long unsigned int total = 0; 3172 3173 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", FALSE, FALSE, TRUE); 3174 if (!h || (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)) 3175 { 3176 asection *first = NULL, *final = NULL, *temp; 3177 bfd_vma sda_base; 3178 /* The first section must be 4-byte aligned to promise _SDA_BASE_ being 3179 4 byte-aligned. Therefore, it has to set the first section ".data" 3180 4 byte-aligned. */ 3181 static const char sec_name[SDA_SECTION_NUM][10] = 3182 { 3183 ".data", ".got", ".sdata_d", ".sdata_w", ".sdata_h", ".sdata_b", 3184 ".sbss_b", ".sbss_h", ".sbss_w", ".sbss_d" 3185 }; 3186 size_t i = 0; 3187 3188 if (output_bfd->sections == NULL) 3189 { 3190 *psb = elf_gp (output_bfd); 3191 return bfd_reloc_ok; 3192 } 3193 3194 /* Get the first and final section. */ 3195 while (i < sizeof (sec_name) / sizeof (sec_name [0])) 3196 { 3197 temp = bfd_get_section_by_name (output_bfd, sec_name[i]); 3198 if (temp && !first && (temp->size != 0 || temp->rawsize != 0)) 3199 first = temp; 3200 if (temp && (temp->size != 0 || temp->rawsize != 0)) 3201 final = temp; 3202 3203 /* Summarize the sections in order to check if joining .bss. */ 3204 if (temp && temp->size != 0) 3205 total += temp->size; 3206 else if (temp && temp->rawsize != 0) 3207 total += temp->rawsize; 3208 3209 i++; 3210 } 3211 3212 /* Check .bss size. */ 3213 temp = bfd_get_section_by_name (output_bfd, ".bss"); 3214 if (temp) 3215 { 3216 if (temp->size != 0) 3217 total += temp->size; 3218 else if (temp->rawsize != 0) 3219 total += temp->rawsize; 3220 3221 if (total < 0x80000) 3222 { 3223 if (!first && (temp->size != 0 || temp->rawsize != 0)) 3224 first = temp; 3225 if ((temp->size != 0 || temp->rawsize != 0)) 3226 final = temp; 3227 } 3228 } 3229 3230 if (first && final) 3231 { 3232 /* The middle of data region. */ 3233 sda_base = final->vma / 2 + final->rawsize / 2 + first->vma / 2; 3234 3235 /* Find the section sda_base located. */ 3236 i = 0; 3237 while (i < sizeof (sec_name) / sizeof (sec_name [0])) 3238 { 3239 final = bfd_get_section_by_name (output_bfd, sec_name[i]); 3240 if (final && (final->size != 0 || final->rawsize != 0) 3241 && sda_base >= final->vma) 3242 { 3243 first = final; 3244 i++; 3245 } 3246 else 3247 break; 3248 } 3249 } 3250 else 3251 { 3252 /* There is not any data section in output bfd, and set _SDA_BASE_ in 3253 first output section. */ 3254 first = output_bfd->sections; 3255 while (first && first->size == 0 && first->rawsize == 0) 3256 first = first->next; 3257 if (!first) 3258 { 3259 *psb = elf_gp (output_bfd); 3260 return bfd_reloc_ok; 3261 } 3262 sda_base = first->vma + first->rawsize; 3263 } 3264 3265 sda_base -= first->vma; 3266 sda_base = sda_base & (~7); 3267 3268 if (!_bfd_generic_link_add_one_symbol 3269 (info, output_bfd, "_SDA_BASE_", BSF_GLOBAL | BSF_WEAK, first, 3270 (bfd_vma) sda_base, (const char *) NULL, FALSE, 3271 get_elf_backend_data (output_bfd)->collect, &h)) 3272 return FALSE; 3273 3274 sda_rela_sec = first; 3275 3276 table = nds32_elf_hash_table (info); 3277 relax_fp_as_gp = table->relax_fp_as_gp; 3278 if (relax_fp_as_gp) 3279 { 3280 h2 = bfd_link_hash_lookup (info->hash, FP_BASE_NAME, 3281 FALSE, FALSE, FALSE); 3282 /* Define a weak FP_BASE_NAME here to prevent the undefined symbol. 3283 And set FP equal to SDA_BASE to do relaxation for 3284 la $fp, _FP_BASE_. */ 3285 if (!_bfd_generic_link_add_one_symbol 3286 (info, output_bfd, FP_BASE_NAME, BSF_GLOBAL | BSF_WEAK, 3287 first, (bfd_vma) sda_base, (const char *) NULL, 3288 FALSE, get_elf_backend_data (output_bfd)->collect, &h2)) 3289 return FALSE; 3290 } 3291 } 3292 3293 if (add_symbol == TRUE) 3294 { 3295 if (h) 3296 { 3297 /* Now set gp. */ 3298 elf_gp (output_bfd) = (h->u.def.value 3299 + h->u.def.section->output_section->vma 3300 + h->u.def.section->output_offset); 3301 } 3302 else 3303 { 3304 (*_bfd_error_handler) (_("error: Can't find symbol: _SDA_BASE_.")); 3305 return bfd_reloc_dangerous; 3306 } 3307 } 3308 3309 *psb = h->u.def.value + h->u.def.section->output_section->vma 3310 + h->u.def.section->output_offset; 3311 return bfd_reloc_ok; 3312} 3313 3314 3315/* Return size of a PLT entry. */ 3316#define elf_nds32_sizeof_plt(info) PLT_ENTRY_SIZE 3317 3318 3319/* Create an entry in an nds32 ELF linker hash table. */ 3320 3321static struct bfd_hash_entry * 3322nds32_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3323 struct bfd_hash_table *table, 3324 const char *string) 3325{ 3326 struct elf_nds32_link_hash_entry *ret; 3327 3328 ret = (struct elf_nds32_link_hash_entry *) entry; 3329 3330 /* Allocate the structure if it has not already been allocated by a 3331 subclass. */ 3332 if (ret == NULL) 3333 ret = (struct elf_nds32_link_hash_entry *) 3334 bfd_hash_allocate (table, sizeof (struct elf_nds32_link_hash_entry)); 3335 3336 if (ret == NULL) 3337 return (struct bfd_hash_entry *) ret; 3338 3339 /* Call the allocation method of the superclass. */ 3340 ret = (struct elf_nds32_link_hash_entry *) 3341 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); 3342 3343 if (ret != NULL) 3344 { 3345 struct elf_nds32_link_hash_entry *eh; 3346 3347 eh = (struct elf_nds32_link_hash_entry *) ret; 3348 eh->dyn_relocs = NULL; 3349 eh->tls_type = GOT_UNKNOWN; 3350 } 3351 3352 return (struct bfd_hash_entry *) ret; 3353} 3354 3355/* Create an nds32 ELF linker hash table. */ 3356 3357static struct bfd_link_hash_table * 3358nds32_elf_link_hash_table_create (bfd *abfd) 3359{ 3360 struct elf_nds32_link_hash_table *ret; 3361 3362 bfd_size_type amt = sizeof (struct elf_nds32_link_hash_table); 3363 3364 ret = (struct elf_nds32_link_hash_table *) bfd_zmalloc (amt); 3365 if (ret == NULL) 3366 return NULL; 3367 3368 /* patch tag. */ 3369 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 3370 nds32_elf_link_hash_newfunc, 3371 sizeof (struct elf_nds32_link_hash_entry), 3372 NDS32_ELF_DATA)) 3373 { 3374 free (ret); 3375 return NULL; 3376 } 3377 3378 ret->sgot = NULL; 3379 ret->sgotplt = NULL; 3380 ret->srelgot = NULL; 3381 ret->splt = NULL; 3382 ret->srelplt = NULL; 3383 ret->sdynbss = NULL; 3384 ret->srelbss = NULL; 3385 ret->sym_ld_script = NULL; 3386 ret->ex9_export_file = NULL; 3387 ret->ex9_import_file = NULL; 3388 3389 return &ret->root.root; 3390} 3391 3392/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 3393 shortcuts to them in our hash table. */ 3394 3395static bfd_boolean 3396create_got_section (bfd *dynobj, struct bfd_link_info *info) 3397{ 3398 struct elf_nds32_link_hash_table *htab; 3399 3400 if (!_bfd_elf_create_got_section (dynobj, info)) 3401 return FALSE; 3402 3403 htab = nds32_elf_hash_table (info); 3404 htab->sgot = bfd_get_section_by_name (dynobj, ".got"); 3405 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 3406 if (!htab->sgot || !htab->sgotplt) 3407 abort (); 3408 3409 /* _bfd_elf_create_got_section will create it for us. */ 3410 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 3411 if (htab->srelgot == NULL 3412 || !bfd_set_section_flags (dynobj, htab->srelgot, 3413 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 3414 | SEC_IN_MEMORY | SEC_LINKER_CREATED 3415 | SEC_READONLY)) 3416 || !bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 3417 return FALSE; 3418 3419 return TRUE; 3420} 3421 3422/* Create dynamic sections when linking against a dynamic object. */ 3423 3424static bfd_boolean 3425nds32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3426{ 3427 struct elf_nds32_link_hash_table *htab; 3428 flagword flags, pltflags; 3429 register asection *s; 3430 const struct elf_backend_data *bed; 3431 int ptralign = 2; /* 32-bit */ 3432 3433 bed = get_elf_backend_data (abfd); 3434 3435 htab = nds32_elf_hash_table (info); 3436 3437 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 3438 .rel[a].bss sections. */ 3439 3440 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3441 | SEC_LINKER_CREATED); 3442 3443 pltflags = flags; 3444 pltflags |= SEC_CODE; 3445 if (bed->plt_not_loaded) 3446 pltflags &= ~(SEC_LOAD | SEC_HAS_CONTENTS); 3447 if (bed->plt_readonly) 3448 pltflags |= SEC_READONLY; 3449 3450 s = bfd_make_section (abfd, ".plt"); 3451 htab->splt = s; 3452 if (s == NULL 3453 || !bfd_set_section_flags (abfd, s, pltflags) 3454 || !bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 3455 return FALSE; 3456 3457 if (bed->want_plt_sym) 3458 { 3459 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 3460 .plt section. */ 3461 struct bfd_link_hash_entry *bh = NULL; 3462 struct elf_link_hash_entry *h; 3463 3464 if (!(_bfd_generic_link_add_one_symbol 3465 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 3466 (bfd_vma) 0, (const char *) NULL, FALSE, 3467 get_elf_backend_data (abfd)->collect, &bh))) 3468 return FALSE; 3469 3470 h = (struct elf_link_hash_entry *) bh; 3471 h->def_regular = 1; 3472 h->type = STT_OBJECT; 3473 3474 if (info->shared && !bfd_elf_link_record_dynamic_symbol (info, h)) 3475 return FALSE; 3476 } 3477 3478 s = bfd_make_section (abfd, 3479 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt"); 3480 htab->srelplt = s; 3481 if (s == NULL 3482 || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY) 3483 || !bfd_set_section_alignment (abfd, s, ptralign)) 3484 return FALSE; 3485 3486 if (htab->sgot == NULL && !create_got_section (abfd, info)) 3487 return FALSE; 3488 3489 { 3490 const char *secname; 3491 char *relname; 3492 flagword secflags; 3493 asection *sec; 3494 3495 for (sec = abfd->sections; sec; sec = sec->next) 3496 { 3497 secflags = bfd_get_section_flags (abfd, sec); 3498 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) 3499 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) 3500 continue; 3501 secname = bfd_get_section_name (abfd, sec); 3502 relname = (char *) bfd_malloc ((bfd_size_type) strlen (secname) + 6); 3503 strcpy (relname, ".rela"); 3504 strcat (relname, secname); 3505 if (bfd_get_section_by_name (abfd, secname)) 3506 continue; 3507 s = bfd_make_section (abfd, relname); 3508 if (s == NULL 3509 || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY) 3510 || !bfd_set_section_alignment (abfd, s, ptralign)) 3511 return FALSE; 3512 } 3513 } 3514 3515 if (bed->want_dynbss) 3516 { 3517 /* The .dynbss section is a place to put symbols which are defined 3518 by dynamic objects, are referenced by regular objects, and are 3519 not functions. We must allocate space for them in the process 3520 image and use a R_*_COPY reloc to tell the dynamic linker to 3521 initialize them at run time. The linker script puts the .dynbss 3522 section into the .bss section of the final image. */ 3523 s = bfd_make_section (abfd, ".dynbss"); 3524 htab->sdynbss = s; 3525 if (s == NULL 3526 || !bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED)) 3527 return FALSE; 3528 /* The .rel[a].bss section holds copy relocs. This section is not 3529 normally needed. We need to create it here, though, so that the 3530 linker will map it to an output section. We can't just create it 3531 only if we need it, because we will not know whether we need it 3532 until we have seen all the input files, and the first time the 3533 main linker code calls BFD after examining all the input files 3534 (size_dynamic_sections) the input sections have already been 3535 mapped to the output sections. If the section turns out not to 3536 be needed, we can discard it later. We will never need this 3537 section when generating a shared object, since they do not use 3538 copy relocs. */ 3539 if (!info->shared) 3540 { 3541 s = bfd_make_section (abfd, (bed->default_use_rela_p 3542 ? ".rela.bss" : ".rel.bss")); 3543 htab->srelbss = s; 3544 if (s == NULL 3545 || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY) 3546 || !bfd_set_section_alignment (abfd, s, ptralign)) 3547 return FALSE; 3548 } 3549 } 3550 3551 return TRUE; 3552} 3553 3554/* Copy the extra info we tack onto an elf_link_hash_entry. */ 3555static void 3556nds32_elf_copy_indirect_symbol (struct bfd_link_info *info, 3557 struct elf_link_hash_entry *dir, 3558 struct elf_link_hash_entry *ind) 3559{ 3560 struct elf_nds32_link_hash_entry *edir, *eind; 3561 3562 edir = (struct elf_nds32_link_hash_entry *) dir; 3563 eind = (struct elf_nds32_link_hash_entry *) ind; 3564 3565 if (eind->dyn_relocs != NULL) 3566 { 3567 if (edir->dyn_relocs != NULL) 3568 { 3569 struct elf_nds32_dyn_relocs **pp; 3570 struct elf_nds32_dyn_relocs *p; 3571 3572 if (ind->root.type == bfd_link_hash_indirect) 3573 abort (); 3574 3575 /* Add reloc counts against the weak sym to the strong sym 3576 list. Merge any entries against the same section. */ 3577 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 3578 { 3579 struct elf_nds32_dyn_relocs *q; 3580 3581 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3582 if (q->sec == p->sec) 3583 { 3584 q->pc_count += p->pc_count; 3585 q->count += p->count; 3586 *pp = p->next; 3587 break; 3588 } 3589 if (q == NULL) 3590 pp = &p->next; 3591 } 3592 *pp = edir->dyn_relocs; 3593 } 3594 3595 edir->dyn_relocs = eind->dyn_relocs; 3596 eind->dyn_relocs = NULL; 3597 } 3598 3599 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3600} 3601 3602 3603/* Adjust a symbol defined by a dynamic object and referenced by a 3604 regular object. The current definition is in some section of the 3605 dynamic object, but we're not including those sections. We have to 3606 change the definition to something the rest of the link can 3607 understand. */ 3608 3609static bfd_boolean 3610nds32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 3611 struct elf_link_hash_entry *h) 3612{ 3613 struct elf_nds32_link_hash_table *htab; 3614 struct elf_nds32_link_hash_entry *eh; 3615 struct elf_nds32_dyn_relocs *p; 3616 bfd *dynobj; 3617 asection *s; 3618 unsigned int power_of_two; 3619 3620 dynobj = elf_hash_table (info)->dynobj; 3621 3622 /* Make sure we know what is going on here. */ 3623 BFD_ASSERT (dynobj != NULL 3624 && (h->needs_plt 3625 || h->u.weakdef != NULL 3626 || (h->def_dynamic && h->ref_regular && !h->def_regular))); 3627 3628 3629 /* If this is a function, put it in the procedure linkage table. We 3630 will fill in the contents of the procedure linkage table later, 3631 when we know the address of the .got section. */ 3632 if (h->type == STT_FUNC || h->needs_plt) 3633 { 3634 if (!info->shared 3635 && !h->def_dynamic 3636 && !h->ref_dynamic 3637 && h->root.type != bfd_link_hash_undefweak 3638 && h->root.type != bfd_link_hash_undefined) 3639 { 3640 /* This case can occur if we saw a PLT reloc in an input 3641 file, but the symbol was never referred to by a dynamic 3642 object. In such a case, we don't actually need to build 3643 a procedure linkage table, and we can just do a PCREL 3644 reloc instead. */ 3645 h->plt.offset = (bfd_vma) - 1; 3646 h->needs_plt = 0; 3647 } 3648 3649 return TRUE; 3650 } 3651 else 3652 h->plt.offset = (bfd_vma) - 1; 3653 3654 /* If this is a weak symbol, and there is a real definition, the 3655 processor independent code will have arranged for us to see the 3656 real definition first, and we can just use the same value. */ 3657 if (h->u.weakdef != NULL) 3658 { 3659 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 3660 || h->u.weakdef->root.type == bfd_link_hash_defweak); 3661 h->root.u.def.section = h->u.weakdef->root.u.def.section; 3662 h->root.u.def.value = h->u.weakdef->root.u.def.value; 3663 return TRUE; 3664 } 3665 3666 /* This is a reference to a symbol defined by a dynamic object which 3667 is not a function. */ 3668 3669 /* If we are creating a shared library, we must presume that the 3670 only references to the symbol are via the global offset table. 3671 For such cases we need not do anything here; the relocations will 3672 be handled correctly by relocate_section. */ 3673 if (info->shared) 3674 return TRUE; 3675 3676 /* If there are no references to this symbol that do not use the 3677 GOT, we don't need to generate a copy reloc. */ 3678 if (!h->non_got_ref) 3679 return TRUE; 3680 3681 /* If -z nocopyreloc was given, we won't generate them either. */ 3682 if (info->nocopyreloc) 3683 { 3684 h->non_got_ref = 0; 3685 return TRUE; 3686 } 3687 3688 eh = (struct elf_nds32_link_hash_entry *) h; 3689 for (p = eh->dyn_relocs; p != NULL; p = p->next) 3690 { 3691 s = p->sec->output_section; 3692 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 3693 break; 3694 } 3695 3696 /* If we didn't find any dynamic relocs in sections which needs the 3697 copy reloc, then we'll be keeping the dynamic relocs and avoiding 3698 the copy reloc. */ 3699 if (p == NULL) 3700 { 3701 h->non_got_ref = 0; 3702 return TRUE; 3703 } 3704 3705 /* We must allocate the symbol in our .dynbss section, which will 3706 become part of the .bss section of the executable. There will be 3707 an entry for this symbol in the .dynsym section. The dynamic 3708 object will contain position independent code, so all references 3709 from the dynamic object to this symbol will go through the global 3710 offset table. The dynamic linker will use the .dynsym entry to 3711 determine the address it must put in the global offset table, so 3712 both the dynamic object and the regular object will refer to the 3713 same memory location for the variable. */ 3714 3715 htab = nds32_elf_hash_table (info); 3716 s = htab->sdynbss; 3717 BFD_ASSERT (s != NULL); 3718 3719 /* We must generate a R_NDS32_COPY reloc to tell the dynamic linker 3720 to copy the initial value out of the dynamic object and into the 3721 runtime process image. We need to remember the offset into the 3722 .rela.bss section we are going to use. */ 3723 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 3724 { 3725 asection *srel; 3726 3727 srel = htab->srelbss; 3728 BFD_ASSERT (srel != NULL); 3729 srel->size += sizeof (Elf32_External_Rela); 3730 h->needs_copy = 1; 3731 } 3732 3733 /* We need to figure out the alignment required for this symbol. I 3734 have no idea how ELF linkers handle this. */ 3735 power_of_two = bfd_log2 (h->size); 3736 if (power_of_two > 3) 3737 power_of_two = 3; 3738 3739 /* Apply the required alignment. */ 3740 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 3741 if (power_of_two > bfd_get_section_alignment (dynobj, s)) 3742 { 3743 if (!bfd_set_section_alignment (dynobj, s, power_of_two)) 3744 return FALSE; 3745 } 3746 3747 /* Define the symbol as being at this point in the section. */ 3748 h->root.u.def.section = s; 3749 h->root.u.def.value = s->size; 3750 3751 /* Increment the section size to make room for the symbol. */ 3752 s->size += h->size; 3753 3754 return TRUE; 3755} 3756 3757/* Allocate space in .plt, .got and associated reloc sections for 3758 dynamic relocs. */ 3759 3760static bfd_boolean 3761allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 3762{ 3763 struct bfd_link_info *info; 3764 struct elf_nds32_link_hash_table *htab; 3765 struct elf_nds32_link_hash_entry *eh; 3766 struct elf_nds32_dyn_relocs *p; 3767 3768 if (h->root.type == bfd_link_hash_indirect) 3769 return TRUE; 3770 3771 if (h->root.type == bfd_link_hash_warning) 3772 /* When warning symbols are created, they **replace** the "real" 3773 entry in the hash table, thus we never get to see the real 3774 symbol in a hash traversal. So look at it now. */ 3775 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3776 3777 info = (struct bfd_link_info *) inf; 3778 htab = nds32_elf_hash_table (info); 3779 3780 eh = (struct elf_nds32_link_hash_entry *) h; 3781 3782 if (htab->root.dynamic_sections_created && h->plt.refcount > 0) 3783 { 3784 /* Make sure this symbol is output as a dynamic symbol. 3785 Undefined weak syms won't yet be marked as dynamic. */ 3786 if (h->dynindx == -1 && !h->forced_local) 3787 { 3788 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3789 return FALSE; 3790 } 3791 3792 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 3793 { 3794 asection *s = htab->splt; 3795 3796 /* If this is the first .plt entry, make room for the special 3797 first entry. */ 3798 if (s->size == 0) 3799 s->size += PLT_ENTRY_SIZE; 3800 3801 h->plt.offset = s->size; 3802 3803 /* If this symbol is not defined in a regular file, and we are 3804 not generating a shared library, then set the symbol to this 3805 location in the .plt. This is required to make function 3806 pointers compare as equal between the normal executable and 3807 the shared library. */ 3808 if (!info->shared && !h->def_regular) 3809 { 3810 h->root.u.def.section = s; 3811 h->root.u.def.value = h->plt.offset; 3812 } 3813 3814 /* Make room for this entry. */ 3815 s->size += PLT_ENTRY_SIZE; 3816 3817 /* We also need to make an entry in the .got.plt section, which 3818 will be placed in the .got section by the linker script. */ 3819 htab->sgotplt->size += 4; 3820 3821 /* We also need to make an entry in the .rel.plt section. */ 3822 htab->srelplt->size += sizeof (Elf32_External_Rela); 3823 } 3824 else 3825 { 3826 h->plt.offset = (bfd_vma) - 1; 3827 h->needs_plt = 0; 3828 } 3829 } 3830 else 3831 { 3832 h->plt.offset = (bfd_vma) - 1; 3833 h->needs_plt = 0; 3834 } 3835 3836 if (h->got.refcount > 0) 3837 { 3838 asection *s; 3839 bfd_boolean dyn; 3840 int tls_type = elf32_nds32_hash_entry (h)->tls_type; 3841 3842 /* Make sure this symbol is output as a dynamic symbol. 3843 Undefined weak syms won't yet be marked as dynamic. */ 3844 if (h->dynindx == -1 && !h->forced_local) 3845 { 3846 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3847 return FALSE; 3848 } 3849 3850 s = htab->sgot; 3851 h->got.offset = s->size; 3852 3853 if (tls_type == GOT_UNKNOWN) 3854 abort (); 3855 else if (tls_type == GOT_NORMAL 3856 || tls_type == GOT_TLS_IE) 3857 /* Need a GOT slot. */ 3858 s->size += 4; 3859 3860 dyn = htab->root.dynamic_sections_created; 3861 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 3862 htab->srelgot->size += sizeof (Elf32_External_Rela); 3863 } 3864 else 3865 h->got.offset = (bfd_vma) - 1; 3866 3867 if (eh->dyn_relocs == NULL) 3868 return TRUE; 3869 3870 /* In the shared -Bsymbolic case, discard space allocated for 3871 dynamic pc-relative relocs against symbols which turn out to be 3872 defined in regular objects. For the normal shared case, discard 3873 space for pc-relative relocs that have become local due to symbol 3874 visibility changes. */ 3875 3876 if (info->shared) 3877 { 3878 if (h->def_regular && (h->forced_local || info->symbolic)) 3879 { 3880 struct elf_nds32_dyn_relocs **pp; 3881 3882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 3883 { 3884 p->count -= p->pc_count; 3885 p->pc_count = 0; 3886 if (p->count == 0) 3887 *pp = p->next; 3888 else 3889 pp = &p->next; 3890 } 3891 } 3892 } 3893 else 3894 { 3895 /* For the non-shared case, discard space for relocs against 3896 symbols which turn out to need copy relocs or are not dynamic. */ 3897 3898 if (!h->non_got_ref 3899 && ((h->def_dynamic 3900 && !h->def_regular) 3901 || (htab->root.dynamic_sections_created 3902 && (h->root.type == bfd_link_hash_undefweak 3903 || h->root.type == bfd_link_hash_undefined)))) 3904 { 3905 /* Make sure this symbol is output as a dynamic symbol. 3906 Undefined weak syms won't yet be marked as dynamic. */ 3907 if (h->dynindx == -1 && !h->forced_local) 3908 { 3909 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3910 return FALSE; 3911 } 3912 3913 /* If that succeeded, we know we'll be keeping all the 3914 relocs. */ 3915 if (h->dynindx != -1) 3916 goto keep; 3917 } 3918 3919 eh->dyn_relocs = NULL; 3920 3921 keep:; 3922 } 3923 3924 /* Finally, allocate space. */ 3925 for (p = eh->dyn_relocs; p != NULL; p = p->next) 3926 { 3927 asection *sreloc = elf_section_data (p->sec)->sreloc; 3928 sreloc->size += p->count * sizeof (Elf32_External_Rela); 3929 } 3930 3931 return TRUE; 3932} 3933 3934/* Find any dynamic relocs that apply to read-only sections. */ 3935 3936static bfd_boolean 3937readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) 3938{ 3939 struct elf_nds32_link_hash_entry *eh; 3940 struct elf_nds32_dyn_relocs *p; 3941 3942 if (h->root.type == bfd_link_hash_warning) 3943 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3944 3945 eh = (struct elf_nds32_link_hash_entry *) h; 3946 for (p = eh->dyn_relocs; p != NULL; p = p->next) 3947 { 3948 asection *s = p->sec->output_section; 3949 3950 if (s != NULL && (s->flags & SEC_READONLY) != 0) 3951 { 3952 struct bfd_link_info *info = (struct bfd_link_info *) inf; 3953 3954 info->flags |= DF_TEXTREL; 3955 3956 /* Not an error, just cut short the traversal. */ 3957 return FALSE; 3958 } 3959 } 3960 return TRUE; 3961} 3962 3963/* Set the sizes of the dynamic sections. */ 3964 3965static bfd_boolean 3966nds32_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 3967 struct bfd_link_info *info) 3968{ 3969 struct elf_nds32_link_hash_table *htab; 3970 bfd *dynobj; 3971 asection *s; 3972 bfd_boolean relocs; 3973 bfd *ibfd; 3974 3975 htab = nds32_elf_hash_table (info); 3976 dynobj = htab->root.dynobj; 3977 BFD_ASSERT (dynobj != NULL); 3978 3979 if (htab->root.dynamic_sections_created) 3980 { 3981 /* Set the contents of the .interp section to the interpreter. */ 3982 if (!info->shared) 3983 { 3984 s = bfd_get_section_by_name (dynobj, ".interp"); 3985 BFD_ASSERT (s != NULL); 3986 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 3987 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 3988 } 3989 } 3990 3991 /* Set up .got offsets for local syms, and space for local dynamic 3992 relocs. */ 3993 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 3994 { 3995 bfd_signed_vma *local_got; 3996 bfd_signed_vma *end_local_got; 3997 bfd_size_type locsymcount; 3998 Elf_Internal_Shdr *symtab_hdr; 3999 asection *srel; 4000 4001 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 4002 continue; 4003 4004 for (s = ibfd->sections; s != NULL; s = s->next) 4005 { 4006 struct elf_nds32_dyn_relocs *p; 4007 4008 for (p = ((struct elf_nds32_dyn_relocs *) 4009 elf_section_data (s)->local_dynrel); 4010 p != NULL; p = p->next) 4011 { 4012 if (!bfd_is_abs_section (p->sec) 4013 && bfd_is_abs_section (p->sec->output_section)) 4014 { 4015 /* Input section has been discarded, either because 4016 it is a copy of a linkonce section or due to 4017 linker script /DISCARD/, so we'll be discarding 4018 the relocs too. */ 4019 } 4020 else if (p->count != 0) 4021 { 4022 srel = elf_section_data (p->sec)->sreloc; 4023 srel->size += p->count * sizeof (Elf32_External_Rela); 4024 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 4025 info->flags |= DF_TEXTREL; 4026 } 4027 } 4028 } 4029 4030 local_got = elf_local_got_refcounts (ibfd); 4031 if (!local_got) 4032 continue; 4033 4034 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4035 locsymcount = symtab_hdr->sh_info; 4036 end_local_got = local_got + locsymcount; 4037 s = htab->sgot; 4038 srel = htab->srelgot; 4039 for (; local_got < end_local_got; ++local_got) 4040 { 4041 if (*local_got > 0) 4042 { 4043 *local_got = s->size; 4044 s->size += 4; 4045 if (info->shared) 4046 srel->size += sizeof (Elf32_External_Rela); 4047 } 4048 else 4049 *local_got = (bfd_vma) - 1; 4050 } 4051 } 4052 4053 /* Allocate global sym .plt and .got entries, and space for global 4054 sym dynamic relocs. */ 4055 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (void *) info); 4056 4057 /* We now have determined the sizes of the various dynamic sections. 4058 Allocate memory for them. */ 4059 relocs = FALSE; 4060 for (s = dynobj->sections; s != NULL; s = s->next) 4061 { 4062 if ((s->flags & SEC_LINKER_CREATED) == 0) 4063 continue; 4064 4065 if (s == htab->splt) 4066 { 4067 /* Strip this section if we don't need it; see the 4068 comment below. */ 4069 } 4070 else if (s == htab->sgot) 4071 { 4072 got_size += s->size; 4073 } 4074 else if (s == htab->sgotplt) 4075 { 4076 got_size += s->size; 4077 } 4078 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) 4079 { 4080 if (s->size != 0 && s != htab->srelplt) 4081 relocs = TRUE; 4082 4083 /* We use the reloc_count field as a counter if we need 4084 to copy relocs into the output file. */ 4085 s->reloc_count = 0; 4086 } 4087 else 4088 { 4089 /* It's not one of our sections, so don't allocate space. */ 4090 continue; 4091 } 4092 4093 if (s->size == 0) 4094 { 4095 /* If we don't need this section, strip it from the 4096 output file. This is mostly to handle .rela.bss and 4097 .rela.plt. We must create both sections in 4098 create_dynamic_sections, because they must be created 4099 before the linker maps input sections to output 4100 sections. The linker does that before 4101 adjust_dynamic_symbol is called, and it is that 4102 function which decides whether anything needs to go 4103 into these sections. */ 4104 s->flags |= SEC_EXCLUDE; 4105 continue; 4106 } 4107 4108 /* Allocate memory for the section contents. We use bfd_zalloc 4109 here in case unused entries are not reclaimed before the 4110 section's contents are written out. This should not happen, 4111 but this way if it does, we get a R_NDS32_NONE reloc instead 4112 of garbage. */ 4113 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 4114 if (s->contents == NULL) 4115 return FALSE; 4116 } 4117 4118 4119 if (htab->root.dynamic_sections_created) 4120 { 4121 /* Add some entries to the .dynamic section. We fill in the 4122 values later, in nds32_elf_finish_dynamic_sections, but we 4123 must add the entries now so that we get the correct size for 4124 the .dynamic section. The DT_DEBUG entry is filled in by the 4125 dynamic linker and used by the debugger. */ 4126#define add_dynamic_entry(TAG, VAL) \ 4127 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 4128 4129 if (!info->shared) 4130 { 4131 if (!add_dynamic_entry (DT_DEBUG, 0)) 4132 return FALSE; 4133 } 4134 4135 if (htab->splt->size != 0) 4136 { 4137 if (!add_dynamic_entry (DT_PLTGOT, 0) 4138 || !add_dynamic_entry (DT_PLTRELSZ, 0) 4139 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 4140 || !add_dynamic_entry (DT_JMPREL, 0)) 4141 return FALSE; 4142 } 4143 4144 if (relocs) 4145 { 4146 if (!add_dynamic_entry (DT_RELA, 0) 4147 || !add_dynamic_entry (DT_RELASZ, 0) 4148 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 4149 return FALSE; 4150 4151 /* If any dynamic relocs apply to a read-only section, 4152 then we need a DT_TEXTREL entry. */ 4153 if ((info->flags & DF_TEXTREL) == 0) 4154 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 4155 (void *) info); 4156 4157 if ((info->flags & DF_TEXTREL) != 0) 4158 { 4159 if (!add_dynamic_entry (DT_TEXTREL, 0)) 4160 return FALSE; 4161 } 4162 } 4163 } 4164#undef add_dynamic_entry 4165 4166 return TRUE; 4167} 4168 4169static bfd_reloc_status_type 4170nds32_relocate_contents (reloc_howto_type *howto, bfd *input_bfd, 4171 bfd_vma relocation, bfd_byte *location) 4172{ 4173 int size; 4174 bfd_vma x = 0; 4175 bfd_reloc_status_type flag; 4176 unsigned int rightshift = howto->rightshift; 4177 unsigned int bitpos = howto->bitpos; 4178 4179 /* If the size is negative, negate RELOCATION. This isn't very 4180 general. */ 4181 if (howto->size < 0) 4182 relocation = -relocation; 4183 4184 /* Get the value we are going to relocate. */ 4185 size = bfd_get_reloc_size (howto); 4186 switch (size) 4187 { 4188 default: 4189 case 0: 4190 case 1: 4191 case 8: 4192 abort (); 4193 break; 4194 case 2: 4195 x = bfd_getb16 (location); 4196 break; 4197 case 4: 4198 x = bfd_getb32 (location); 4199 break; 4200 } 4201 4202 /* Check for overflow. FIXME: We may drop bits during the addition 4203 which we don't check for. We must either check at every single 4204 operation, which would be tedious, or we must do the computations 4205 in a type larger than bfd_vma, which would be inefficient. */ 4206 flag = bfd_reloc_ok; 4207 if (howto->complain_on_overflow != complain_overflow_dont) 4208 { 4209 bfd_vma addrmask, fieldmask, signmask, ss; 4210 bfd_vma a, b, sum; 4211 4212 /* Get the values to be added together. For signed and unsigned 4213 relocations, we assume that all values should be truncated to 4214 the size of an address. For bitfields, all the bits matter. 4215 See also bfd_check_overflow. */ 4216 fieldmask = N_ONES (howto->bitsize); 4217 signmask = ~fieldmask; 4218 addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask; 4219 a = (relocation & addrmask) >> rightshift; 4220 b = (x & howto->src_mask & addrmask) >> bitpos; 4221 4222 switch (howto->complain_on_overflow) 4223 { 4224 case complain_overflow_signed: 4225 /* If any sign bits are set, all sign bits must be set. 4226 That is, A must be a valid negative address after 4227 shifting. */ 4228 signmask = ~(fieldmask >> 1); 4229 /* Fall through. */ 4230 4231 case complain_overflow_bitfield: 4232 /* Much like the signed check, but for a field one bit 4233 wider. We allow a bitfield to represent numbers in the 4234 range -2**n to 2**n-1, where n is the number of bits in the 4235 field. Note that when bfd_vma is 32 bits, a 32-bit reloc 4236 can't overflow, which is exactly what we want. */ 4237 ss = a & signmask; 4238 if (ss != 0 && ss != ((addrmask >> rightshift) & signmask)) 4239 flag = bfd_reloc_overflow; 4240 4241 /* We only need this next bit of code if the sign bit of B 4242 is below the sign bit of A. This would only happen if 4243 SRC_MASK had fewer bits than BITSIZE. Note that if 4244 SRC_MASK has more bits than BITSIZE, we can get into 4245 trouble; we would need to verify that B is in range, as 4246 we do for A above. */ 4247 ss = ((~howto->src_mask) >> 1) & howto->src_mask; 4248 ss >>= bitpos; 4249 4250 /* Set all the bits above the sign bit. */ 4251 b = (b ^ ss) - ss; 4252 4253 /* Now we can do the addition. */ 4254 sum = a + b; 4255 4256 /* See if the result has the correct sign. Bits above the 4257 sign bit are junk now; ignore them. If the sum is 4258 positive, make sure we did not have all negative inputs; 4259 if the sum is negative, make sure we did not have all 4260 positive inputs. The test below looks only at the sign 4261 bits, and it really just 4262 SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM) 4263 4264 We mask with addrmask here to explicitly allow an address 4265 wrap-around. The Linux kernel relies on it, and it is 4266 the only way to write assembler code which can run when 4267 loaded at a location 0x80000000 away from the location at 4268 which it is linked. */ 4269 if (((~(a ^ b)) & (a ^ sum)) & signmask & addrmask) 4270 flag = bfd_reloc_overflow; 4271 4272 break; 4273 4274 case complain_overflow_unsigned: 4275 /* Checking for an unsigned overflow is relatively easy: 4276 trim the addresses and add, and trim the result as well. 4277 Overflow is normally indicated when the result does not 4278 fit in the field. However, we also need to consider the 4279 case when, e.g., fieldmask is 0x7fffffff or smaller, an 4280 input is 0x80000000, and bfd_vma is only 32 bits; then we 4281 will get sum == 0, but there is an overflow, since the 4282 inputs did not fit in the field. Instead of doing a 4283 separate test, we can check for this by or-ing in the 4284 operands when testing for the sum overflowing its final 4285 field. */ 4286 sum = (a + b) & addrmask; 4287 if ((a | b | sum) & signmask) 4288 flag = bfd_reloc_overflow; 4289 break; 4290 4291 default: 4292 abort (); 4293 } 4294 } 4295 4296 /* Put RELOCATION in the right bits. */ 4297 relocation >>= (bfd_vma) rightshift; 4298 relocation <<= (bfd_vma) bitpos; 4299 4300 /* Add RELOCATION to the right bits of X. */ 4301 /* FIXME : 090616 4302 Because the relaxation may generate duplicate relocation at one address, 4303 an addition to immediate in the instruction may cause the relocation added 4304 several times. 4305 This bug should be fixed in assembler, but a check is also needed here. */ 4306 if (howto->partial_inplace) 4307 x = ((x & ~howto->dst_mask) 4308 | (((x & howto->src_mask) + relocation) & howto->dst_mask)); 4309 else 4310 x = ((x & ~howto->dst_mask) | ((relocation) & howto->dst_mask)); 4311 4312 4313 /* Put the relocated value back in the object file. */ 4314 switch (size) 4315 { 4316 default: 4317 case 0: 4318 case 1: 4319 case 8: 4320 abort (); 4321 break; 4322 case 2: 4323 bfd_putb16 (x, location); 4324 break; 4325 case 4: 4326 bfd_putb32 (x, location); 4327 break; 4328 } 4329 4330 return flag; 4331} 4332 4333static bfd_reloc_status_type 4334nds32_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd, 4335 asection *input_section, bfd_byte *contents, 4336 bfd_vma address, bfd_vma value, bfd_vma addend) 4337{ 4338 bfd_vma relocation; 4339 4340 /* Sanity check the address. */ 4341 if (address > bfd_get_section_limit (input_bfd, input_section)) 4342 return bfd_reloc_outofrange; 4343 4344 /* This function assumes that we are dealing with a basic relocation 4345 against a symbol. We want to compute the value of the symbol to 4346 relocate to. This is just VALUE, the value of the symbol, plus 4347 ADDEND, any addend associated with the reloc. */ 4348 relocation = value + addend; 4349 4350 /* If the relocation is PC relative, we want to set RELOCATION to 4351 the distance between the symbol (currently in RELOCATION) and the 4352 location we are relocating. Some targets (e.g., i386-aout) 4353 arrange for the contents of the section to be the negative of the 4354 offset of the location within the section; for such targets 4355 pcrel_offset is FALSE. Other targets (e.g., m88kbcs or ELF) 4356 simply leave the contents of the section as zero; for such 4357 targets pcrel_offset is TRUE. If pcrel_offset is FALSE we do not 4358 need to subtract out the offset of the location within the 4359 section (which is just ADDRESS). */ 4360 if (howto->pc_relative) 4361 { 4362 relocation -= (input_section->output_section->vma 4363 + input_section->output_offset); 4364 if (howto->pcrel_offset) 4365 relocation -= address; 4366 } 4367 4368 return nds32_relocate_contents (howto, input_bfd, relocation, 4369 contents + address); 4370} 4371 4372static bfd_boolean 4373nds32_elf_output_symbol_hook (struct bfd_link_info *info, 4374 const char *name, 4375 Elf_Internal_Sym *elfsym ATTRIBUTE_UNUSED, 4376 asection *input_sec, 4377 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) 4378{ 4379 const char *source; 4380 FILE *sym_ld_script = NULL; 4381 struct elf_nds32_link_hash_table *table; 4382 4383 table = nds32_elf_hash_table (info); 4384 sym_ld_script = table->sym_ld_script; 4385 if (!sym_ld_script) 4386 return TRUE; 4387 4388 if (!h || !name || *name == '\0') 4389 return TRUE; 4390 4391 if (input_sec->flags & SEC_EXCLUDE) 4392 return TRUE; 4393 4394 if (!check_start_export_sym) 4395 { 4396 fprintf (sym_ld_script, "SECTIONS\n{\n"); 4397 check_start_export_sym = 1; 4398 } 4399 4400 if (h->root.type == bfd_link_hash_defined 4401 || h->root.type == bfd_link_hash_defweak) 4402 { 4403 if (!h->root.u.def.section->output_section) 4404 return TRUE; 4405 4406 if (bfd_is_const_section (input_sec)) 4407 source = input_sec->name; 4408 else 4409 source = input_sec->owner->filename; 4410 4411 fprintf (sym_ld_script, "\t%s = 0x%08lx;\t /* %s */\n", 4412 h->root.root.string, 4413 (long) (h->root.u.def.value 4414 + h->root.u.def.section->output_section->vma 4415 + h->root.u.def.section->output_offset), source); 4416 } 4417 4418 return TRUE; 4419} 4420 4421/* Relocate an NDS32/D ELF section. 4422 There is some attempt to make this function usable for many architectures, 4423 both for RELA and REL type relocs, if only to serve as a learning tool. 4424 4425 The RELOCATE_SECTION function is called by the new ELF backend linker 4426 to handle the relocations for a section. 4427 4428 The relocs are always passed as Rela structures; if the section 4429 actually uses Rel structures, the r_addend field will always be 4430 zero. 4431 4432 This function is responsible for adjust the section contents as 4433 necessary, and (if using Rela relocs and generating a 4434 relocatable output file) adjusting the reloc addend as 4435 necessary. 4436 4437 This function does not have to worry about setting the reloc 4438 address or the reloc symbol index. 4439 4440 LOCAL_SYMS is a pointer to the swapped in local symbols. 4441 4442 LOCAL_SECTIONS is an array giving the section in the input file 4443 corresponding to the st_shndx field of each local symbol. 4444 4445 The global hash table entry for the global symbols can be found 4446 via elf_sym_hashes (input_bfd). 4447 4448 When generating relocatable output, this function must handle 4449 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 4450 going to be the section symbol corresponding to the output 4451 section, which means that the addend must be adjusted 4452 accordingly. */ 4453 4454static bfd_vma 4455dtpoff_base (struct bfd_link_info *info) 4456{ 4457 /* If tls_sec is NULL, we should have signalled an error already. */ 4458 if (elf_hash_table (info)->tls_sec == NULL) 4459 return 0; 4460 return elf_hash_table (info)->tls_sec->vma; 4461} 4462 4463static bfd_boolean 4464nds32_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, 4465 struct bfd_link_info * info, 4466 bfd * input_bfd, 4467 asection * input_section, 4468 bfd_byte * contents, 4469 Elf_Internal_Rela * relocs, 4470 Elf_Internal_Sym * local_syms, 4471 asection ** local_sections) 4472{ 4473 Elf_Internal_Shdr *symtab_hdr; 4474 struct elf_link_hash_entry **sym_hashes; 4475 Elf_Internal_Rela *rel, *relend; 4476 bfd_boolean ret = TRUE; /* Assume success. */ 4477 int align = 0; 4478 bfd_reloc_status_type r; 4479 const char *errmsg = NULL; 4480 bfd_vma gp; 4481 struct elf_nds32_link_hash_table *htab; 4482 bfd *dynobj; 4483 bfd_vma *local_got_offsets; 4484 asection *sgot, *splt, *sreloc; 4485 bfd_vma high_address; 4486 struct elf_nds32_link_hash_table *table; 4487 int eliminate_gc_relocs; 4488 bfd_vma fpbase_addr; 4489 4490 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 4491 sym_hashes = elf_sym_hashes (input_bfd); 4492 htab = nds32_elf_hash_table (info); 4493 high_address = bfd_get_section_limit (input_bfd, input_section); 4494 4495 dynobj = htab->root.dynobj; 4496 local_got_offsets = elf_local_got_offsets (input_bfd); 4497 4498 sgot = htab->sgot; 4499 splt = htab->splt; 4500 sreloc = NULL; 4501 4502 rel = relocs; 4503 relend = relocs + input_section->reloc_count; 4504 4505 table = nds32_elf_hash_table (info); 4506 eliminate_gc_relocs = table->eliminate_gc_relocs; 4507 /* By this time, we can adjust the value of _SDA_BASE_. */ 4508 if ((!info->relocatable)) 4509 { 4510 is_SDA_BASE_set = 1; 4511 r = nds32_elf_final_sda_base (output_bfd, info, &gp, TRUE); 4512 if (r != bfd_reloc_ok) 4513 return FALSE; 4514 } 4515 4516 if (table->target_optimize & NDS32_RELAX_JUMP_IFC_ON) 4517 if (!nds32_elf_ifc_reloc ()) 4518 (*_bfd_error_handler) (_("error: IFC relocation error.")); 4519 4520 /* Relocation for .ex9.itable. */ 4521 if (table->target_optimize & NDS32_RELAX_EX9_ON 4522 || (table->ex9_import_file && table->update_ex9_table)) 4523 nds32_elf_ex9_reloc_jmp (info); 4524 4525 /* Use gp as fp to prevent truncated fit. Because in relaxation time 4526 the fp value is set as gp, and it has be reverted for instruction 4527 setting fp. */ 4528 fpbase_addr = elf_gp (output_bfd); 4529 4530 for (rel = relocs; rel < relend; rel++) 4531 { 4532 enum elf_nds32_reloc_type r_type; 4533 reloc_howto_type *howto = NULL; 4534 unsigned long r_symndx; 4535 struct elf_link_hash_entry *h = NULL; 4536 Elf_Internal_Sym *sym = NULL; 4537 asection *sec; 4538 bfd_vma relocation; 4539 4540 /* We can't modify r_addend here as elf_link_input_bfd has an assert to 4541 ensure it's zero (we use REL relocs, not RELA). Therefore this 4542 should be assigning zero to `addend', but for clarity we use 4543 `r_addend'. */ 4544 4545 bfd_vma addend = rel->r_addend; 4546 bfd_vma offset = rel->r_offset; 4547 4548 r_type = ELF32_R_TYPE (rel->r_info); 4549 if (r_type >= R_NDS32_max) 4550 { 4551 (*_bfd_error_handler) (_("%B: error: unknown relocation type %d."), 4552 input_bfd, r_type); 4553 bfd_set_error (bfd_error_bad_value); 4554 ret = FALSE; 4555 continue; 4556 } 4557 4558 if (r_type == R_NDS32_GNU_VTENTRY 4559 || r_type == R_NDS32_GNU_VTINHERIT 4560 || r_type == R_NDS32_NONE 4561 || r_type == R_NDS32_RELA_GNU_VTENTRY 4562 || r_type == R_NDS32_RELA_GNU_VTINHERIT 4563 || (r_type >= R_NDS32_INSN16 && r_type <= R_NDS32_25_FIXED_RELA) 4564 || r_type == R_NDS32_DATA 4565 || r_type == R_NDS32_TRAN 4566 || (r_type >= R_NDS32_LONGCALL4 && r_type <= R_NDS32_LONGJUMP6)) 4567 continue; 4568 4569 /* If we enter the fp-as-gp region. Resolve the address of best fp-base. */ 4570 if (ELF32_R_TYPE (rel->r_info) == R_NDS32_RELAX_REGION_BEGIN 4571 && (rel->r_addend & R_NDS32_RELAX_REGION_OMIT_FP_FLAG)) 4572 { 4573 int dist; 4574 4575 /* Distance to relocation of best fp-base is encoded in R_SYM. */ 4576 dist = rel->r_addend >> 16; 4577 fpbase_addr = calculate_memory_address (input_bfd, rel + dist, 4578 local_syms, symtab_hdr); 4579 } 4580 else if (ELF32_R_TYPE (rel->r_info) == R_NDS32_RELAX_REGION_END 4581 && (rel->r_addend & R_NDS32_RELAX_REGION_OMIT_FP_FLAG)) 4582 { 4583 fpbase_addr = elf_gp (output_bfd); 4584 } 4585 4586 if (((r_type >= R_NDS32_DWARF2_OP1_RELA 4587 && r_type <= R_NDS32_DWARF2_LEB_RELA) 4588 || r_type >= R_NDS32_RELAX_ENTRY) && !info->relocatable) 4589 continue; 4590 4591 howto = bfd_elf32_bfd_reloc_type_table_lookup (r_type); 4592 r_symndx = ELF32_R_SYM (rel->r_info); 4593 4594 /* This is a final link. */ 4595 sym = NULL; 4596 sec = NULL; 4597 h = NULL; 4598 4599 if (r_symndx < symtab_hdr->sh_info) 4600 { 4601 /* Local symbol. */ 4602 sym = local_syms + r_symndx; 4603 sec = local_sections[r_symndx]; 4604 4605 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 4606 addend = rel->r_addend; 4607 } 4608 else 4609 { 4610 /* External symbol. */ 4611 bfd_boolean warned, ignored, unresolved_reloc; 4612 int symndx = r_symndx - symtab_hdr->sh_info; 4613 4614 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 4615 r_symndx, symtab_hdr, sym_hashes, h, sec, 4616 relocation, unresolved_reloc, warned, 4617 ignored); 4618 4619 /* la $fp, _FP_BASE_ is per-function (region). 4620 Handle it specially. */ 4621 switch ((int) r_type) 4622 { 4623 case R_NDS32_SDA19S0_RELA: 4624 case R_NDS32_SDA15S0_RELA: 4625 case R_NDS32_20_RELA: 4626 if (strcmp (elf_sym_hashes (input_bfd)[symndx]->root.root.string, 4627 FP_BASE_NAME) == 0) 4628 { 4629 relocation = fpbase_addr; 4630 break; 4631 } 4632 } 4633 4634 } 4635 4636 if (info->relocatable) 4637 { 4638 /* This is a relocatable link. We don't have to change 4639 anything, unless the reloc is against a section symbol, 4640 in which case we have to adjust according to where the 4641 section symbol winds up in the output section. */ 4642 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 4643 rel->r_addend += sec->output_offset + sym->st_value; 4644 4645 continue; 4646 } 4647 4648 /* Sanity check the address. */ 4649 if (offset > high_address) 4650 { 4651 r = bfd_reloc_outofrange; 4652 goto check_reloc; 4653 } 4654 4655 if ((r_type >= R_NDS32_DWARF2_OP1_RELA 4656 && r_type <= R_NDS32_DWARF2_LEB_RELA) 4657 || r_type >= R_NDS32_RELAX_ENTRY) 4658 continue; 4659 4660 switch ((int) r_type) 4661 { 4662 case R_NDS32_GOTOFF: 4663 /* Relocation is relative to the start of the global offset 4664 table (for ld24 rx, #uimm24), e.g. access at label+addend 4665 4666 ld24 rx. #label@GOTOFF + addend 4667 sub rx, r12. */ 4668 case R_NDS32_GOTOFF_HI20: 4669 case R_NDS32_GOTOFF_LO12: 4670 case R_NDS32_GOTOFF_LO15: 4671 case R_NDS32_GOTOFF_LO19: 4672 BFD_ASSERT (sgot != NULL); 4673 4674 relocation -= elf_gp (output_bfd); 4675 break; 4676 4677 case R_NDS32_9_PLTREL: 4678 case R_NDS32_25_PLTREL: 4679 /* Relocation is to the entry for this symbol in the 4680 procedure linkage table. */ 4681 4682 /* The native assembler will generate a 25_PLTREL reloc 4683 for a local symbol if you assemble a call from one 4684 section to another when using -K pic. */ 4685 if (h == NULL) 4686 break; 4687 4688 if (h->forced_local) 4689 break; 4690 4691 /* We didn't make a PLT entry for this symbol. This 4692 happens when statically linking PIC code, or when 4693 using -Bsymbolic. */ 4694 if (h->plt.offset == (bfd_vma) - 1) 4695 break; 4696 4697 relocation = (splt->output_section->vma 4698 + splt->output_offset + h->plt.offset); 4699 break; 4700 4701 case R_NDS32_PLT_GOTREL_HI20: 4702 case R_NDS32_PLT_GOTREL_LO12: 4703 case R_NDS32_PLT_GOTREL_LO15: 4704 case R_NDS32_PLT_GOTREL_LO19: 4705 case R_NDS32_PLT_GOTREL_LO20: 4706 if (h == NULL || h->forced_local || h->plt.offset == (bfd_vma) - 1) 4707 { 4708 /* We didn't make a PLT entry for this symbol. This 4709 happens when statically linking PIC code, or when 4710 using -Bsymbolic. */ 4711 relocation -= elf_gp (output_bfd); 4712 break; 4713 } 4714 4715 relocation = (splt->output_section->vma 4716 + splt->output_offset + h->plt.offset); 4717 4718 relocation -= elf_gp (output_bfd); 4719 break; 4720 4721 case R_NDS32_PLTREL_HI20: 4722 case R_NDS32_PLTREL_LO12: 4723 4724 /* Relocation is to the entry for this symbol in the 4725 procedure linkage table. */ 4726 4727 /* The native assembler will generate a 25_PLTREL reloc 4728 for a local symbol if you assemble a call from one 4729 section to another when using -K pic. */ 4730 if (h == NULL) 4731 break; 4732 4733 if (h->forced_local) 4734 break; 4735 4736 if (h->plt.offset == (bfd_vma) - 1) 4737 /* We didn't make a PLT entry for this symbol. This 4738 happens when statically linking PIC code, or when 4739 using -Bsymbolic. */ 4740 break; 4741 4742 if (splt == NULL) 4743 break; 4744 4745 relocation = (splt->output_section->vma 4746 + splt->output_offset 4747 + h->plt.offset + 4) 4748 - (input_section->output_section->vma 4749 + input_section->output_offset 4750 + rel->r_offset); 4751 4752 break; 4753 4754 case R_NDS32_GOTPC20: 4755 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 4756 ld24 rx,#_GLOBAL_OFFSET_TABLE_ */ 4757 relocation = elf_gp (output_bfd); 4758 break; 4759 4760 case R_NDS32_GOTPC_HI20: 4761 case R_NDS32_GOTPC_LO12: 4762 { 4763 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 4764 bl .+4 4765 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 4766 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 4767 or 4768 bl .+4 4769 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 4770 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 4771 */ 4772 relocation = elf_gp (output_bfd); 4773 relocation -= (input_section->output_section->vma 4774 + input_section->output_offset + rel->r_offset); 4775 break; 4776 } 4777 4778 case R_NDS32_GOT20: 4779 /* Fall through. */ 4780 case R_NDS32_GOT_HI20: 4781 case R_NDS32_GOT_LO12: 4782 case R_NDS32_GOT_LO15: 4783 case R_NDS32_GOT_LO19: 4784 /* Relocation is to the entry for this symbol in the global 4785 offset table. */ 4786 BFD_ASSERT (sgot != NULL); 4787 4788 if (h != NULL) 4789 { 4790 bfd_boolean dyn; 4791 bfd_vma off; 4792 4793 off = h->got.offset; 4794 BFD_ASSERT (off != (bfd_vma) - 1); 4795 dyn = htab->root.dynamic_sections_created; 4796 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 4797 || (info->shared 4798 && (info->symbolic 4799 || h->dynindx == -1 4800 || h->forced_local) && h->def_regular)) 4801 { 4802 /* This is actually a static link, or it is a 4803 -Bsymbolic link and the symbol is defined 4804 locally, or the symbol was forced to be local 4805 because of a version file. We must initialize 4806 this entry in the global offset table. Since the 4807 offset must always be a multiple of 4, we use the 4808 least significant bit to record whether we have 4809 initialized it already. 4810 4811 When doing a dynamic link, we create a .rela.got 4812 relocation entry to initialize the value. This 4813 is done in the finish_dynamic_symbol routine. */ 4814 if ((off & 1) != 0) 4815 off &= ~1; 4816 else 4817 { 4818 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 4819 h->got.offset |= 1; 4820 } 4821 } 4822 relocation = sgot->output_section->vma + sgot->output_offset + off 4823 - elf_gp (output_bfd); 4824 } 4825 else 4826 { 4827 bfd_vma off; 4828 bfd_byte *loc; 4829 4830 BFD_ASSERT (local_got_offsets != NULL 4831 && local_got_offsets[r_symndx] != (bfd_vma) - 1); 4832 4833 off = local_got_offsets[r_symndx]; 4834 4835 /* The offset must always be a multiple of 4. We use 4836 the least significant bit to record whether we have 4837 already processed this entry. */ 4838 if ((off & 1) != 0) 4839 off &= ~1; 4840 else 4841 { 4842 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 4843 4844 if (info->shared) 4845 { 4846 asection *srelgot; 4847 Elf_Internal_Rela outrel; 4848 4849 /* We need to generate a R_NDS32_RELATIVE reloc 4850 for the dynamic linker. */ 4851 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 4852 BFD_ASSERT (srelgot != NULL); 4853 4854 outrel.r_offset = (elf_gp (output_bfd) 4855 + sgot->output_offset + off); 4856 outrel.r_info = ELF32_R_INFO (0, R_NDS32_RELATIVE); 4857 outrel.r_addend = relocation; 4858 loc = srelgot->contents; 4859 loc += 4860 srelgot->reloc_count * sizeof (Elf32_External_Rela); 4861 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4862 ++srelgot->reloc_count; 4863 } 4864 local_got_offsets[r_symndx] |= 1; 4865 } 4866 relocation = sgot->output_section->vma + sgot->output_offset + off 4867 - elf_gp (output_bfd); 4868 } 4869 4870 break; 4871 4872 case R_NDS32_16_RELA: 4873 case R_NDS32_20_RELA: 4874 case R_NDS32_5_RELA: 4875 case R_NDS32_32_RELA: 4876 case R_NDS32_9_PCREL_RELA: 4877 case R_NDS32_WORD_9_PCREL_RELA: 4878 case R_NDS32_10_UPCREL_RELA: 4879 case R_NDS32_15_PCREL_RELA: 4880 case R_NDS32_17_PCREL_RELA: 4881 case R_NDS32_25_PCREL_RELA: 4882 case R_NDS32_HI20_RELA: 4883 case R_NDS32_LO12S3_RELA: 4884 case R_NDS32_LO12S2_RELA: 4885 case R_NDS32_LO12S2_DP_RELA: 4886 case R_NDS32_LO12S2_SP_RELA: 4887 case R_NDS32_LO12S1_RELA: 4888 case R_NDS32_LO12S0_RELA: 4889 case R_NDS32_LO12S0_ORI_RELA: 4890 if (info->shared && r_symndx != 0 4891 && (input_section->flags & SEC_ALLOC) != 0 4892 && (eliminate_gc_relocs == 0 4893 || (sec && (sec->flags & SEC_EXCLUDE) == 0)) 4894 && ((r_type != R_NDS32_9_PCREL_RELA 4895 && r_type != R_NDS32_WORD_9_PCREL_RELA 4896 && r_type != R_NDS32_10_UPCREL_RELA 4897 && r_type != R_NDS32_15_PCREL_RELA 4898 && r_type != R_NDS32_17_PCREL_RELA 4899 && r_type != R_NDS32_25_PCREL_RELA 4900 && !(r_type == R_NDS32_32_RELA 4901 && strcmp (input_section->name, ".eh_frame") == 0)) 4902 || (h != NULL && h->dynindx != -1 4903 && (!info->symbolic || !h->def_regular)))) 4904 { 4905 Elf_Internal_Rela outrel; 4906 bfd_boolean skip, relocate; 4907 bfd_byte *loc; 4908 4909 /* When generating a shared object, these relocations 4910 are copied into the output file to be resolved at run 4911 time. */ 4912 4913 if (sreloc == NULL) 4914 { 4915 const char *name; 4916 4917 name = bfd_elf_string_from_elf_section 4918 (input_bfd, elf_elfheader (input_bfd)->e_shstrndx, 4919 elf_section_data (input_section)->rela.hdr->sh_name); 4920 if (name == NULL) 4921 return FALSE; 4922 4923 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 4924 && strcmp (bfd_get_section_name (input_bfd, 4925 input_section), 4926 name + 5) == 0); 4927 4928 sreloc = bfd_get_section_by_name (dynobj, name); 4929 BFD_ASSERT (sreloc != NULL); 4930 } 4931 4932 skip = FALSE; 4933 relocate = FALSE; 4934 4935 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 4936 info, 4937 input_section, 4938 rel->r_offset); 4939 if (outrel.r_offset == (bfd_vma) - 1) 4940 skip = TRUE; 4941 else if (outrel.r_offset == (bfd_vma) - 2) 4942 skip = TRUE, relocate = TRUE; 4943 outrel.r_offset += (input_section->output_section->vma 4944 + input_section->output_offset); 4945 4946 if (skip) 4947 memset (&outrel, 0, sizeof outrel); 4948 else if (r_type == R_NDS32_17_PCREL_RELA 4949 || r_type == R_NDS32_15_PCREL_RELA 4950 || r_type == R_NDS32_25_PCREL_RELA) 4951 { 4952 BFD_ASSERT (h != NULL && h->dynindx != -1); 4953 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 4954 outrel.r_addend = rel->r_addend; 4955 } 4956 else 4957 { 4958 /* h->dynindx may be -1 if this symbol was marked to 4959 become local. */ 4960 if (h == NULL 4961 || ((info->symbolic || h->dynindx == -1) 4962 && h->def_regular)) 4963 { 4964 relocate = TRUE; 4965 outrel.r_info = ELF32_R_INFO (0, R_NDS32_RELATIVE); 4966 outrel.r_addend = relocation + rel->r_addend; 4967 } 4968 else 4969 { 4970 BFD_ASSERT (h->dynindx != -1); 4971 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 4972 outrel.r_addend = rel->r_addend; 4973 } 4974 } 4975 4976 loc = sreloc->contents; 4977 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 4978 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4979 ++sreloc->reloc_count; 4980 4981 /* If this reloc is against an external symbol, we do 4982 not want to fiddle with the addend. Otherwise, we 4983 need to include the symbol value so that it becomes 4984 an addend for the dynamic reloc. */ 4985 if (!relocate) 4986 continue; 4987 } 4988 break; 4989 4990 case R_NDS32_25_ABS_RELA: 4991 if (info->shared) 4992 { 4993 (*_bfd_error_handler) 4994 (_("%s: warning: cannot deal R_NDS32_25_ABS_RELA in shared " 4995 "mode."), bfd_get_filename (input_bfd)); 4996 return FALSE; 4997 } 4998 break; 4999 5000 case R_NDS32_9_PCREL: 5001 r = nds32_elf_do_9_pcrel_reloc (input_bfd, howto, input_section, 5002 contents, offset, 5003 sec, relocation, addend); 5004 goto check_reloc; 5005 5006 case R_NDS32_HI20: 5007 { 5008 Elf_Internal_Rela *lorel; 5009 5010 /* We allow an arbitrary number of HI20 relocs before the 5011 LO12 reloc. This permits gcc to emit the HI and LO relocs 5012 itself. */ 5013 for (lorel = rel + 1; 5014 (lorel < relend 5015 && ELF32_R_TYPE (lorel->r_info) == R_NDS32_HI20); lorel++) 5016 continue; 5017 if (lorel < relend 5018 && (ELF32_R_TYPE (lorel->r_info) == R_NDS32_LO12S3 5019 || ELF32_R_TYPE (lorel->r_info) == R_NDS32_LO12S2 5020 || ELF32_R_TYPE (lorel->r_info) == R_NDS32_LO12S1 5021 || ELF32_R_TYPE (lorel->r_info) == R_NDS32_LO12S0)) 5022 { 5023 nds32_elf_relocate_hi20 (input_bfd, r_type, rel, lorel, 5024 contents, relocation + addend); 5025 r = bfd_reloc_ok; 5026 } 5027 else 5028 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 5029 contents, offset, relocation, 5030 addend); 5031 } 5032 5033 goto check_reloc; 5034 5035 case R_NDS32_GOT17S2_RELA: 5036 case R_NDS32_GOT15S2_RELA: 5037 { 5038 bfd_vma off; 5039 5040 BFD_ASSERT (sgot != NULL); 5041 5042 if (h != NULL) 5043 { 5044 bfd_boolean dyn; 5045 5046 off = h->got.offset; 5047 BFD_ASSERT (off != (bfd_vma) - 1); 5048 5049 dyn = htab->root.dynamic_sections_created; 5050 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL 5051 (dyn, info->shared, h) || (info->shared 5052 && (info->symbolic 5053 || h->dynindx == -1 5054 || h->forced_local) 5055 && h->def_regular)) 5056 { 5057 /* This is actually a static link, or it is a 5058 -Bsymbolic link and the symbol is defined 5059 locally, or the symbol was forced to be local 5060 because of a version file. We must initialize 5061 this entry in the global offset table. Since the 5062 offset must always be a multiple of 4, we use the 5063 least significant bit to record whether we have 5064 initialized it already. 5065 5066 When doing a dynamic link, we create a .rela.got 5067 relocation entry to initialize the value. This 5068 is done in the finish_dynamic_symbol routine. */ 5069 if ((off & 1) != 0) 5070 off &= ~1; 5071 else 5072 { 5073 bfd_put_32 (output_bfd, relocation, 5074 sgot->contents + off); 5075 h->got.offset |= 1; 5076 } 5077 } 5078 } 5079 else 5080 { 5081 bfd_byte *loc; 5082 5083 BFD_ASSERT (local_got_offsets != NULL 5084 && local_got_offsets[r_symndx] != (bfd_vma) - 1); 5085 5086 off = local_got_offsets[r_symndx]; 5087 5088 /* The offset must always be a multiple of 4. We use 5089 the least significant bit to record whether we have 5090 already processed this entry. */ 5091 if ((off & 1) != 0) 5092 off &= ~1; 5093 else 5094 { 5095 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 5096 5097 if (info->shared) 5098 { 5099 asection *srelgot; 5100 Elf_Internal_Rela outrel; 5101 5102 /* We need to generate a R_NDS32_RELATIVE reloc 5103 for the dynamic linker. */ 5104 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 5105 BFD_ASSERT (srelgot != NULL); 5106 5107 outrel.r_offset = (elf_gp (output_bfd) 5108 + sgot->output_offset + off); 5109 outrel.r_info = ELF32_R_INFO (0, R_NDS32_RELATIVE); 5110 outrel.r_addend = relocation; 5111 loc = srelgot->contents; 5112 loc += 5113 srelgot->reloc_count * sizeof (Elf32_External_Rela); 5114 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 5115 ++srelgot->reloc_count; 5116 } 5117 local_got_offsets[r_symndx] |= 1; 5118 } 5119 } 5120 relocation = sgot->output_section->vma + sgot->output_offset + off 5121 - elf_gp (output_bfd); 5122 } 5123 if (relocation & align) 5124 { 5125 /* Incorrect alignment. */ 5126 (*_bfd_error_handler) 5127 (_("%B: warning: unaligned access to GOT entry."), input_bfd); 5128 ret = FALSE; 5129 r = bfd_reloc_dangerous; 5130 goto check_reloc; 5131 } 5132 break; 5133 5134 case R_NDS32_SDA16S3_RELA: 5135 case R_NDS32_SDA15S3_RELA: 5136 case R_NDS32_SDA15S3: 5137 align = 0x7; 5138 goto handle_sda; 5139 5140 case R_NDS32_SDA17S2_RELA: 5141 case R_NDS32_SDA15S2_RELA: 5142 case R_NDS32_SDA12S2_SP_RELA: 5143 case R_NDS32_SDA12S2_DP_RELA: 5144 case R_NDS32_SDA15S2: 5145 case R_NDS32_SDA_FP7U2_RELA: 5146 align = 0x3; 5147 goto handle_sda; 5148 5149 case R_NDS32_SDA18S1_RELA: 5150 case R_NDS32_SDA15S1_RELA: 5151 case R_NDS32_SDA15S1: 5152 align = 0x1; 5153 goto handle_sda; 5154 5155 case R_NDS32_SDA19S0_RELA: 5156 case R_NDS32_SDA15S0_RELA: 5157 case R_NDS32_SDA15S0: 5158 { 5159 align = 0x0; 5160handle_sda: 5161 BFD_ASSERT (sec != NULL); 5162 5163 /* If the symbol is in the abs section, the out_bfd will be null. 5164 This happens when the relocation has a symbol@GOTOFF. */ 5165 r = nds32_elf_final_sda_base (output_bfd, info, &gp, FALSE); 5166 if (r != bfd_reloc_ok) 5167 { 5168 (*_bfd_error_handler) 5169 (_("%B: warning: relocate SDA_BASE failed."), input_bfd); 5170 ret = FALSE; 5171 goto check_reloc; 5172 } 5173 5174 /* At this point `relocation' contains the object's 5175 address. */ 5176 if (r_type == R_NDS32_SDA_FP7U2_RELA) 5177 { 5178 relocation -= fpbase_addr; 5179 } 5180 else 5181 relocation -= gp; 5182 /* Now it contains the offset from _SDA_BASE_. */ 5183 5184 /* Make sure alignment is correct. */ 5185 5186 if (relocation & align) 5187 { 5188 /* Incorrect alignment. */ 5189 (*_bfd_error_handler) 5190 (_("%B(%A): warning: unaligned small data access of type %d."), 5191 input_bfd, input_section, r_type); 5192 ret = FALSE; 5193 goto check_reloc; 5194 } 5195 } 5196 5197 break; 5198 case R_NDS32_17IFC_PCREL_RELA: 5199 case R_NDS32_10IFCU_PCREL_RELA: 5200 /* do nothing */ 5201 break; 5202 5203 case R_NDS32_TLS_LE_HI20: 5204 case R_NDS32_TLS_LE_LO12: 5205 case R_NDS32_TLS_LE_20: 5206 case R_NDS32_TLS_LE_15S0: 5207 case R_NDS32_TLS_LE_15S1: 5208 case R_NDS32_TLS_LE_15S2: 5209 if (elf_hash_table (info)->tls_sec != NULL) 5210 relocation -= (elf_hash_table (info)->tls_sec->vma + TP_OFFSET); 5211 break; 5212 case R_NDS32_TLS_IE_HI20: 5213 case R_NDS32_TLS_IE_LO12S2: 5214 { 5215 /* Relocation is to the entry for this symbol in the global 5216 offset table. */ 5217 unsigned int tls_type; 5218 asection *srelgot; 5219 Elf_Internal_Rela outrel; 5220 bfd_vma off; 5221 bfd_byte *loc; 5222 int indx = 0; 5223 5224 BFD_ASSERT (sgot != NULL); 5225 if (h != NULL) 5226 { 5227 bfd_boolean dyn; 5228 5229 off = h->got.offset; 5230 BFD_ASSERT (off != (bfd_vma) - 1); 5231 dyn = htab->root.dynamic_sections_created; 5232 tls_type = ((struct elf_nds32_link_hash_entry *) h)->tls_type; 5233 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 5234 && (!info->shared 5235 || !SYMBOL_REFERENCES_LOCAL (info, h))) 5236 indx = h->dynindx; 5237 } 5238 else 5239 { 5240 /* Never happen currently. */ 5241 BFD_ASSERT (local_got_offsets != NULL 5242 && local_got_offsets[r_symndx] != (bfd_vma) - 1); 5243 5244 off = local_got_offsets[r_symndx]; 5245 5246 tls_type = elf32_nds32_local_got_tls_type (input_bfd)[r_symndx]; 5247 } 5248 relocation = sgot->output_section->vma + sgot->output_offset + off; 5249 5250 if (r_type == R_NDS32_TLS_IE_LO12S2) 5251 break; 5252 5253 /* The offset must always be a multiple of 4. We use 5254 the least significant bit to record whether we have 5255 already processed this entry. */ 5256 if ((off & 1) != 0) 5257 off &= ~1; 5258 else 5259 { 5260 bfd_boolean need_relocs = FALSE; 5261 srelgot = htab->srelgot; 5262 if ((info->shared || indx != 0) 5263 && (h == NULL 5264 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5265 || h->root.type != bfd_link_hash_undefweak)) 5266 { 5267 need_relocs = TRUE; 5268 BFD_ASSERT (srelgot != NULL); 5269 } 5270 if (tls_type & GOT_TLS_IE) 5271 { 5272 if (need_relocs) 5273 { 5274 if (h->dynindx == 0) 5275 outrel.r_addend = relocation - dtpoff_base (info); 5276 else 5277 outrel.r_addend = 0; 5278 outrel.r_offset = (sgot->output_section->vma 5279 + sgot->output_offset 5280 + off); 5281 outrel.r_info = 5282 ELF32_R_INFO (h->dynindx, R_NDS32_TLS_TPOFF); 5283 5284 loc = srelgot->contents; 5285 loc += 5286 srelgot->reloc_count * sizeof (Elf32_External_Rela); 5287 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 5288 ++srelgot->reloc_count; 5289 } 5290 else 5291 bfd_put_32 (output_bfd, h->root.u.def.value - TP_OFFSET, 5292 sgot->contents + off); 5293 } 5294 } 5295 } 5296 break; 5297 5298 /* DON'T fall through. */ 5299 5300 default: 5301 /* OLD_NDS32_RELOC. */ 5302 5303 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 5304 contents, offset, relocation, addend); 5305 goto check_reloc; 5306 } 5307 5308 switch ((int) r_type) 5309 { 5310 case R_NDS32_20_RELA: 5311 case R_NDS32_5_RELA: 5312 case R_NDS32_9_PCREL_RELA: 5313 case R_NDS32_WORD_9_PCREL_RELA: 5314 case R_NDS32_10_UPCREL_RELA: 5315 case R_NDS32_15_PCREL_RELA: 5316 case R_NDS32_17_PCREL_RELA: 5317 case R_NDS32_25_PCREL_RELA: 5318 case R_NDS32_25_ABS_RELA: 5319 case R_NDS32_HI20_RELA: 5320 case R_NDS32_LO12S3_RELA: 5321 case R_NDS32_LO12S2_RELA: 5322 case R_NDS32_LO12S2_DP_RELA: 5323 case R_NDS32_LO12S2_SP_RELA: 5324 case R_NDS32_LO12S1_RELA: 5325 case R_NDS32_LO12S0_RELA: 5326 case R_NDS32_LO12S0_ORI_RELA: 5327 case R_NDS32_SDA16S3_RELA: 5328 case R_NDS32_SDA17S2_RELA: 5329 case R_NDS32_SDA18S1_RELA: 5330 case R_NDS32_SDA19S0_RELA: 5331 case R_NDS32_SDA15S3_RELA: 5332 case R_NDS32_SDA15S2_RELA: 5333 case R_NDS32_SDA12S2_DP_RELA: 5334 case R_NDS32_SDA12S2_SP_RELA: 5335 case R_NDS32_SDA15S1_RELA: 5336 case R_NDS32_SDA15S0_RELA: 5337 case R_NDS32_SDA_FP7U2_RELA: 5338 case R_NDS32_9_PLTREL: 5339 case R_NDS32_25_PLTREL: 5340 case R_NDS32_GOT20: 5341 case R_NDS32_GOT_HI20: 5342 case R_NDS32_GOT_LO12: 5343 case R_NDS32_GOT_LO15: 5344 case R_NDS32_GOT_LO19: 5345 case R_NDS32_GOT15S2_RELA: 5346 case R_NDS32_GOT17S2_RELA: 5347 case R_NDS32_GOTPC20: 5348 case R_NDS32_GOTPC_HI20: 5349 case R_NDS32_GOTPC_LO12: 5350 case R_NDS32_GOTOFF: 5351 case R_NDS32_GOTOFF_HI20: 5352 case R_NDS32_GOTOFF_LO12: 5353 case R_NDS32_GOTOFF_LO15: 5354 case R_NDS32_GOTOFF_LO19: 5355 case R_NDS32_PLTREL_HI20: 5356 case R_NDS32_PLTREL_LO12: 5357 case R_NDS32_PLT_GOTREL_HI20: 5358 case R_NDS32_PLT_GOTREL_LO12: 5359 case R_NDS32_PLT_GOTREL_LO15: 5360 case R_NDS32_PLT_GOTREL_LO19: 5361 case R_NDS32_PLT_GOTREL_LO20: 5362 case R_NDS32_17IFC_PCREL_RELA: 5363 case R_NDS32_10IFCU_PCREL_RELA: 5364 case R_NDS32_TLS_LE_HI20: 5365 case R_NDS32_TLS_LE_LO12: 5366 case R_NDS32_TLS_IE_HI20: 5367 case R_NDS32_TLS_IE_LO12S2: 5368 case R_NDS32_TLS_LE_20: 5369 case R_NDS32_TLS_LE_15S0: 5370 case R_NDS32_TLS_LE_15S1: 5371 case R_NDS32_TLS_LE_15S2: 5372 /* Instruction related relocs must handle endian properly. */ 5373 /* NOTE: PIC IS NOT HANDLE YET; DO IT LATER. */ 5374 r = nds32_elf_final_link_relocate (howto, input_bfd, 5375 input_section, contents, 5376 rel->r_offset, relocation, 5377 rel->r_addend); 5378 break; 5379 5380 default: 5381 /* All other relocs can use default handler. */ 5382 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 5383 contents, rel->r_offset, 5384 relocation, rel->r_addend); 5385 break; 5386 } 5387 5388check_reloc: 5389 5390 if (r != bfd_reloc_ok) 5391 { 5392 /* FIXME: This should be generic enough to go in a utility. */ 5393 const char *name; 5394 5395 if (h != NULL) 5396 name = h->root.root.string; 5397 else 5398 { 5399 name = bfd_elf_string_from_elf_section 5400 (input_bfd, symtab_hdr->sh_link, sym->st_name); 5401 if (name == NULL || *name == '\0') 5402 name = bfd_section_name (input_bfd, sec); 5403 } 5404 5405 if (errmsg != NULL) 5406 goto common_error; 5407 5408 switch (r) 5409 { 5410 case bfd_reloc_overflow: 5411 if (!((*info->callbacks->reloc_overflow) 5412 (info, (h ? &h->root : NULL), name, howto->name, 5413 (bfd_vma) 0, input_bfd, input_section, offset))) 5414 return FALSE; 5415 break; 5416 5417 case bfd_reloc_undefined: 5418 if (!((*info->callbacks->undefined_symbol) 5419 (info, name, input_bfd, input_section, offset, TRUE))) 5420 return FALSE; 5421 break; 5422 5423 case bfd_reloc_outofrange: 5424 errmsg = _("internal error: out of range error"); 5425 goto common_error; 5426 5427 case bfd_reloc_notsupported: 5428 errmsg = _("internal error: unsupported relocation error"); 5429 goto common_error; 5430 5431 case bfd_reloc_dangerous: 5432 errmsg = _("internal error: dangerous error"); 5433 goto common_error; 5434 5435 default: 5436 errmsg = _("internal error: unknown error"); 5437 /* Fall through. */ 5438 5439common_error: 5440 if (!((*info->callbacks->warning) 5441 (info, errmsg, name, input_bfd, input_section, offset))) 5442 return FALSE; 5443 break; 5444 } 5445 } 5446 } 5447 5448 return ret; 5449} 5450 5451/* Finish up dynamic symbol handling. We set the contents of various 5452 dynamic sections here. */ 5453 5454static bfd_boolean 5455nds32_elf_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, 5456 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) 5457{ 5458 struct elf_nds32_link_hash_table *htab; 5459 bfd_byte *loc; 5460 5461 htab = nds32_elf_hash_table (info); 5462 5463 if (h->plt.offset != (bfd_vma) - 1) 5464 { 5465 asection *splt; 5466 asection *sgot; 5467 asection *srela; 5468 5469 bfd_vma plt_index; 5470 bfd_vma got_offset; 5471 bfd_vma local_plt_offset; 5472 Elf_Internal_Rela rela; 5473 5474 /* This symbol has an entry in the procedure linkage table. Set 5475 it up. */ 5476 5477 BFD_ASSERT (h->dynindx != -1); 5478 5479 splt = htab->splt; 5480 sgot = htab->sgotplt; 5481 srela = htab->srelplt; 5482 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 5483 5484 /* Get the index in the procedure linkage table which 5485 corresponds to this symbol. This is the index of this symbol 5486 in all the symbols for which we are making plt entries. The 5487 first entry in the procedure linkage table is reserved. */ 5488 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 5489 5490 /* Get the offset into the .got table of the entry that 5491 corresponds to this function. Each .got entry is 4 bytes. 5492 The first three are reserved. */ 5493 got_offset = (plt_index + 3) * 4; 5494 5495 /* Fill in the entry in the procedure linkage table. */ 5496 if (!info->shared) 5497 { 5498 unsigned long insn; 5499 5500 insn = PLT_ENTRY_WORD0 + (((sgot->output_section->vma 5501 + sgot->output_offset + got_offset) >> 12) 5502 & 0xfffff); 5503 bfd_putb32 (insn, splt->contents + h->plt.offset); 5504 5505 insn = PLT_ENTRY_WORD1 + (((sgot->output_section->vma 5506 + sgot->output_offset + got_offset) & 0x0fff) 5507 >> 2); 5508 bfd_putb32 (insn, splt->contents + h->plt.offset + 4); 5509 5510 insn = PLT_ENTRY_WORD2; 5511 bfd_putb32 (insn, splt->contents + h->plt.offset + 8); 5512 5513 insn = PLT_ENTRY_WORD3 + (plt_index & 0x7ffff); 5514 bfd_putb32 (insn, splt->contents + h->plt.offset + 12); 5515 5516 insn = PLT_ENTRY_WORD4 5517 + (((unsigned int) ((-(h->plt.offset + 16)) >> 1)) & 0xffffff); 5518 bfd_putb32 (insn, splt->contents + h->plt.offset + 16); 5519 local_plt_offset = 12; 5520 } 5521 else 5522 { 5523 /* sda_base must be set at this time. */ 5524 unsigned long insn; 5525 long offset; 5526 5527 /* FIXME, sda_base is 65536, it will damage opcode. */ 5528 /* insn = PLT_PIC_ENTRY_WORD0 + (((got_offset - sda_base) >> 2) & 0x7fff); */ 5529 offset = sgot->output_section->vma + sgot->output_offset + got_offset 5530 - elf_gp (output_bfd); 5531 insn = PLT_PIC_ENTRY_WORD0 + ((offset >> 12) & 0xfffff); 5532 bfd_putb32 (insn, splt->contents + h->plt.offset); 5533 5534 insn = PLT_PIC_ENTRY_WORD1 + (offset & 0xfff); 5535 bfd_putb32 (insn, splt->contents + h->plt.offset + 4); 5536 5537 insn = PLT_PIC_ENTRY_WORD2; 5538 bfd_putb32 (insn, splt->contents + h->plt.offset + 8); 5539 5540 insn = PLT_PIC_ENTRY_WORD3; 5541 bfd_putb32 (insn, splt->contents + h->plt.offset + 12); 5542 5543 insn = PLT_PIC_ENTRY_WORD4 + (plt_index & 0x7fffff); 5544 bfd_putb32 (insn, splt->contents + h->plt.offset + 16); 5545 5546 insn = PLT_PIC_ENTRY_WORD5 5547 + (((unsigned int) ((-(h->plt.offset + 20)) >> 1)) & 0xffffff); 5548 bfd_putb32 (insn, splt->contents + h->plt.offset + 20); 5549 5550 local_plt_offset = 16; 5551 } 5552 5553 /* Fill in the entry in the global offset table, 5554 so it will fall through to the next instruction for the first time. */ 5555 bfd_put_32 (output_bfd, 5556 (splt->output_section->vma + splt->output_offset 5557 + h->plt.offset + local_plt_offset), 5558 sgot->contents + got_offset); 5559 5560 /* Fill in the entry in the .rela.plt section. */ 5561 rela.r_offset = (sgot->output_section->vma 5562 + sgot->output_offset + got_offset); 5563 rela.r_info = ELF32_R_INFO (h->dynindx, R_NDS32_JMP_SLOT); 5564 rela.r_addend = 0; 5565 loc = srela->contents; 5566 loc += plt_index * sizeof (Elf32_External_Rela); 5567 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5568 5569 if (!h->def_regular) 5570 { 5571 /* Mark the symbol as undefined, rather than as defined in 5572 the .plt section. Leave the value alone. */ 5573 sym->st_shndx = SHN_UNDEF; 5574 if (!h->ref_regular_nonweak) 5575 sym->st_value = 0; 5576 } 5577 } 5578 5579 if (h->got.offset != (bfd_vma) - 1) 5580 { 5581 asection *sgot; 5582 asection *srela; 5583 Elf_Internal_Rela rela; 5584 5585 /* This symbol has an entry in the global offset table. 5586 Set it up. */ 5587 5588 sgot = htab->sgot; 5589 srela = htab->srelgot; 5590 BFD_ASSERT (sgot != NULL && srela != NULL); 5591 5592 rela.r_offset = (sgot->output_section->vma 5593 + sgot->output_offset + (h->got.offset & ~1)); 5594 5595 /* If this is a -Bsymbolic link, and the symbol is defined 5596 locally, we just want to emit a RELATIVE reloc. Likewise if 5597 the symbol was forced to be local because of a version file. 5598 The entry in the global offset table will already have been 5599 initialized in the relocate_section function. */ 5600 if (info->shared 5601 && (info->symbolic 5602 || h->dynindx == -1 || h->forced_local) && h->def_regular) 5603 { 5604 rela.r_info = ELF32_R_INFO (0, R_NDS32_RELATIVE); 5605 rela.r_addend = (h->root.u.def.value 5606 + h->root.u.def.section->output_section->vma 5607 + h->root.u.def.section->output_offset); 5608 } 5609 else 5610 { 5611 BFD_ASSERT ((h->got.offset & 1) == 0); 5612 bfd_put_32 (output_bfd, (bfd_vma) 0, 5613 sgot->contents + h->got.offset); 5614 rela.r_info = ELF32_R_INFO (h->dynindx, R_NDS32_GLOB_DAT); 5615 rela.r_addend = 0; 5616 } 5617 5618 loc = srela->contents; 5619 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 5620 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5621 ++srela->reloc_count; 5622 } 5623 5624 if (h->needs_copy) 5625 { 5626 asection *s; 5627 Elf_Internal_Rela rela; 5628 5629 /* This symbols needs a copy reloc. Set it up. */ 5630 5631 BFD_ASSERT (h->dynindx != -1 5632 && (h->root.type == bfd_link_hash_defined 5633 || h->root.type == bfd_link_hash_defweak)); 5634 5635 s = bfd_get_section_by_name (h->root.u.def.section->owner, ".rela.bss"); 5636 BFD_ASSERT (s != NULL); 5637 5638 rela.r_offset = (h->root.u.def.value 5639 + h->root.u.def.section->output_section->vma 5640 + h->root.u.def.section->output_offset); 5641 rela.r_info = ELF32_R_INFO (h->dynindx, R_NDS32_COPY); 5642 rela.r_addend = 0; 5643 loc = s->contents; 5644 loc += s->reloc_count * sizeof (Elf32_External_Rela); 5645 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5646 ++s->reloc_count; 5647 } 5648 5649 /* Mark some specially defined symbols as absolute. */ 5650 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 5651 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 5652 sym->st_shndx = SHN_ABS; 5653 5654 return TRUE; 5655} 5656 5657 5658/* Finish up the dynamic sections. */ 5659 5660static bfd_boolean 5661nds32_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 5662{ 5663 struct elf_nds32_link_hash_table *htab; 5664 bfd *dynobj; 5665 asection *sdyn; 5666 asection *sgot; 5667 5668 htab = nds32_elf_hash_table (info); 5669 dynobj = htab->root.dynobj; 5670 5671 sgot = htab->sgotplt; 5672 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 5673 5674 if (htab->root.dynamic_sections_created) 5675 { 5676 asection *splt; 5677 Elf32_External_Dyn *dyncon, *dynconend; 5678 5679 BFD_ASSERT (sgot != NULL && sdyn != NULL); 5680 5681 dyncon = (Elf32_External_Dyn *) sdyn->contents; 5682 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 5683 5684 for (; dyncon < dynconend; dyncon++) 5685 { 5686 Elf_Internal_Dyn dyn; 5687 asection *s; 5688 5689 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 5690 5691 switch (dyn.d_tag) 5692 { 5693 default: 5694 break; 5695 5696 case DT_PLTGOT: 5697 /* name = ".got"; */ 5698 s = htab->sgot->output_section; 5699 goto get_vma; 5700 case DT_JMPREL: 5701 s = htab->srelplt->output_section; 5702 get_vma: 5703 BFD_ASSERT (s != NULL); 5704 dyn.d_un.d_ptr = s->vma; 5705 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5706 break; 5707 5708 case DT_PLTRELSZ: 5709 s = htab->srelplt->output_section; 5710 BFD_ASSERT (s != NULL); 5711 dyn.d_un.d_val = s->size; 5712 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5713 break; 5714 5715 case DT_RELASZ: 5716 /* My reading of the SVR4 ABI indicates that the 5717 procedure linkage table relocs (DT_JMPREL) should be 5718 included in the overall relocs (DT_RELA). This is 5719 what Solaris does. However, UnixWare can not handle 5720 that case. Therefore, we override the DT_RELASZ entry 5721 here to make it not include the JMPREL relocs. Since 5722 the linker script arranges for .rela.plt to follow all 5723 other relocation sections, we don't have to worry 5724 about changing the DT_RELA entry. */ 5725 if (htab->srelplt != NULL) 5726 { 5727 s = htab->srelplt->output_section; 5728 dyn.d_un.d_val -= s->size; 5729 } 5730 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5731 break; 5732 } 5733 } 5734 5735 /* Fill in the first entry in the procedure linkage table. */ 5736 splt = htab->splt; 5737 if (splt && splt->size > 0) 5738 { 5739 if (info->shared) 5740 { 5741 unsigned long insn; 5742 long offset; 5743 5744 /* FIXME, sda_base is 65536, it will damage opcode. */ 5745 /* insn = PLT_PIC_ENTRY_WORD0 + (((got_offset - sda_base) >> 2) & 0x7fff); */ 5746 offset = sgot->output_section->vma + sgot->output_offset + 4 5747 - elf_gp (output_bfd); 5748 insn = PLT0_PIC_ENTRY_WORD0 | ((offset >> 12) & 0xfffff); 5749 bfd_putb32 (insn, splt->contents); 5750 5751 /* insn = PLT0_PIC_ENTRY_WORD0 | (((8 - sda_base) >> 2) & 0x7fff) ; */ 5752 /* here has a typo? */ 5753 insn = PLT0_PIC_ENTRY_WORD1 | (offset & 0xfff); 5754 bfd_putb32 (insn, splt->contents + 4); 5755 5756 insn = PLT0_PIC_ENTRY_WORD2; 5757 bfd_putb32 (insn, splt->contents + 8); 5758 5759 insn = PLT0_PIC_ENTRY_WORD3; 5760 bfd_putb32 (insn, splt->contents + 12); 5761 5762 insn = PLT0_PIC_ENTRY_WORD4; 5763 bfd_putb32 (insn, splt->contents + 16); 5764 5765 insn = PLT0_PIC_ENTRY_WORD5; 5766 bfd_putb32 (insn, splt->contents + 20); 5767 } 5768 else 5769 { 5770 unsigned long insn; 5771 unsigned long addr; 5772 5773 /* addr = .got + 4 */ 5774 addr = sgot->output_section->vma + sgot->output_offset + 4; 5775 insn = PLT0_ENTRY_WORD0 | ((addr >> 12) & 0xfffff); 5776 bfd_putb32 (insn, splt->contents); 5777 5778 insn = PLT0_ENTRY_WORD1 | (addr & 0x0fff); 5779 bfd_putb32 (insn, splt->contents + 4); 5780 5781 insn = PLT0_ENTRY_WORD2; 5782 bfd_putb32 (insn, splt->contents + 8); 5783 5784 insn = PLT0_ENTRY_WORD3; 5785 bfd_putb32 (insn, splt->contents + 12); 5786 5787 insn = PLT0_ENTRY_WORD4; 5788 bfd_putb32 (insn, splt->contents + 16); 5789 } 5790 5791 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 5792 PLT_ENTRY_SIZE; 5793 } 5794 } 5795 5796 /* Fill in the first three entries in the global offset table. */ 5797 if (sgot && sgot->size > 0) 5798 { 5799 if (sdyn == NULL) 5800 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 5801 else 5802 bfd_put_32 (output_bfd, 5803 sdyn->output_section->vma + sdyn->output_offset, 5804 sgot->contents); 5805 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 5806 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 5807 5808 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 5809 } 5810 5811 return TRUE; 5812} 5813 5814 5815/* Set the right machine number. */ 5816 5817static bfd_boolean 5818nds32_elf_object_p (bfd *abfd) 5819{ 5820 static unsigned int cur_arch = 0; 5821 5822 if (E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH)) 5823 { 5824 /* E_N1_ARCH is a wild card, so it is set only when no others exist. */ 5825 cur_arch = (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH); 5826 } 5827 5828 switch (cur_arch) 5829 { 5830 default: 5831 case E_N1_ARCH: 5832 bfd_default_set_arch_mach (abfd, bfd_arch_nds32, bfd_mach_n1); 5833 break; 5834 case E_N1H_ARCH: 5835 bfd_default_set_arch_mach (abfd, bfd_arch_nds32, bfd_mach_n1h); 5836 break; 5837 case E_NDS_ARCH_STAR_V2_0: 5838 bfd_default_set_arch_mach (abfd, bfd_arch_nds32, bfd_mach_n1h_v2); 5839 break; 5840 case E_NDS_ARCH_STAR_V3_0: 5841 bfd_default_set_arch_mach (abfd, bfd_arch_nds32, bfd_mach_n1h_v3); 5842 break; 5843 case E_NDS_ARCH_STAR_V3_M: 5844 bfd_default_set_arch_mach (abfd, bfd_arch_nds32, bfd_mach_n1h_v3m); 5845 break; 5846 } 5847 5848 return TRUE; 5849} 5850 5851/* Store the machine number in the flags field. */ 5852 5853static void 5854nds32_elf_final_write_processing (bfd *abfd, 5855 bfd_boolean linker ATTRIBUTE_UNUSED) 5856{ 5857 unsigned long val; 5858 static unsigned int cur_mach = 0; 5859 5860 if (bfd_mach_n1 != bfd_get_mach (abfd)) 5861 { 5862 cur_mach = bfd_get_mach (abfd); 5863 } 5864 5865 switch (cur_mach) 5866 { 5867 case bfd_mach_n1: 5868 /* Only happen when object is empty, since the case is abandon. */ 5869 val = E_N1_ARCH; 5870 val |= E_NDS_ABI_AABI; 5871 val |= E_NDS32_ELF_VER_1_4; 5872 break; 5873 case bfd_mach_n1h: 5874 val = E_N1H_ARCH; 5875 break; 5876 case bfd_mach_n1h_v2: 5877 val = E_NDS_ARCH_STAR_V2_0; 5878 break; 5879 case bfd_mach_n1h_v3: 5880 val = E_NDS_ARCH_STAR_V3_0; 5881 break; 5882 case bfd_mach_n1h_v3m: 5883 val = E_NDS_ARCH_STAR_V3_M; 5884 break; 5885 default: 5886 val = 0; 5887 break; 5888 } 5889 5890 elf_elfheader (abfd)->e_flags &= ~EF_NDS_ARCH; 5891 elf_elfheader (abfd)->e_flags |= val; 5892} 5893 5894/* Function to keep NDS32 specific file flags. */ 5895 5896static bfd_boolean 5897nds32_elf_set_private_flags (bfd *abfd, flagword flags) 5898{ 5899 BFD_ASSERT (!elf_flags_init (abfd) 5900 || elf_elfheader (abfd)->e_flags == flags); 5901 5902 elf_elfheader (abfd)->e_flags = flags; 5903 elf_flags_init (abfd) = TRUE; 5904 return TRUE; 5905} 5906 5907static unsigned int 5908convert_e_flags (unsigned int e_flags, unsigned int arch) 5909{ 5910 if ((e_flags & EF_NDS_ARCH) == E_NDS_ARCH_STAR_V0_9) 5911 { 5912 /* From 0.9 to 1.0. */ 5913 e_flags = (e_flags & (~EF_NDS_ARCH)) | E_NDS_ARCH_STAR_V1_0; 5914 5915 /* Invert E_NDS32_HAS_NO_MAC_INST. */ 5916 e_flags ^= E_NDS32_HAS_NO_MAC_INST; 5917 if (arch == E_NDS_ARCH_STAR_V1_0) 5918 { 5919 /* Done. */ 5920 return e_flags; 5921 } 5922 } 5923 5924 /* From 1.0 to 2.0. */ 5925 e_flags = (e_flags & (~EF_NDS_ARCH)) | E_NDS_ARCH_STAR_V2_0; 5926 5927 /* Clear E_NDS32_HAS_MFUSR_PC_INST. */ 5928 e_flags &= ~E_NDS32_HAS_MFUSR_PC_INST; 5929 5930 /* Invert E_NDS32_HAS_NO_MAC_INST. */ 5931 e_flags ^= E_NDS32_HAS_NO_MAC_INST; 5932 return e_flags; 5933} 5934 5935static bfd_boolean 5936nds32_check_vec_size (bfd *ibfd) 5937{ 5938 static unsigned int nds32_vec_size = 0; 5939 5940 asection *sec_t = NULL; 5941 bfd_byte *contents = NULL; 5942 5943 sec_t = bfd_get_section_by_name (ibfd, ".nds32_e_flags"); 5944 5945 if (sec_t && sec_t->size >= 4) 5946 { 5947 /* Get vec_size in file. */ 5948 unsigned int flag_t; 5949 5950 nds32_get_section_contents (ibfd, sec_t, &contents); 5951 flag_t = bfd_get_32 (ibfd, contents); 5952 5953 /* The value could only be 4 or 16. */ 5954 5955 if (!nds32_vec_size) 5956 /* Set if not set yet. */ 5957 nds32_vec_size = (flag_t & 0x3); 5958 else if (nds32_vec_size != (flag_t & 0x3)) 5959 { 5960 (*_bfd_error_handler) (_("%B: ISR vector size mismatch" 5961 " with previous modules, previous %u-byte, current %u-byte"), 5962 ibfd, 5963 nds32_vec_size == 1 ? 4 : nds32_vec_size == 2 ? 16 : 0xffffffff, 5964 (flag_t & 0x3) == 1 ? 4 : (flag_t & 0x3) == 2 ? 16 : 0xffffffff); 5965 return FALSE; 5966 } 5967 else 5968 /* Only keep the first vec_size section. */ 5969 sec_t->flags |= SEC_EXCLUDE; 5970 } 5971 5972 return TRUE; 5973} 5974 5975/* Merge backend specific data from an object file to the output 5976 object file when linking. */ 5977 5978static bfd_boolean 5979nds32_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 5980{ 5981 flagword out_flags; 5982 flagword in_flags; 5983 flagword out_16regs; 5984 flagword in_no_mac; 5985 flagword out_no_mac; 5986 flagword in_16regs; 5987 flagword out_version; 5988 flagword in_version; 5989 flagword out_fpu_config; 5990 flagword in_fpu_config; 5991 5992 /* TODO: Revise to use object-attributes instead. */ 5993 if (!nds32_check_vec_size (ibfd)) 5994 return FALSE; 5995 5996 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 5997 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 5998 return TRUE; 5999 6000 if (bfd_little_endian (ibfd) != bfd_little_endian (obfd)) 6001 { 6002 (*_bfd_error_handler) 6003 (_("%B: warning: Endian mismatch with previous modules."), ibfd); 6004 6005 bfd_set_error (bfd_error_bad_value); 6006 return FALSE; 6007 } 6008 6009 in_version = elf_elfheader (ibfd)->e_flags & EF_NDS32_ELF_VERSION; 6010 if (in_version == E_NDS32_ELF_VER_1_2) 6011 { 6012 (*_bfd_error_handler) 6013 (_("%B: warning: Older version of object file encountered, " 6014 "Please recompile with current tool chain."), ibfd); 6015 } 6016 6017 /* We may need to merge V1 and V2 arch object files to V2. */ 6018 if ((elf_elfheader (ibfd)->e_flags & EF_NDS_ARCH) 6019 != (elf_elfheader (obfd)->e_flags & EF_NDS_ARCH)) 6020 { 6021 /* Need to convert version. */ 6022 if ((elf_elfheader (ibfd)->e_flags & EF_NDS_ARCH) 6023 == E_NDS_ARCH_STAR_RESERVED) 6024 { 6025 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 6026 } 6027 else if ((elf_elfheader (obfd)->e_flags & EF_NDS_ARCH) == E_NDS_ARCH_STAR_V0_9 6028 || (elf_elfheader (ibfd)->e_flags & EF_NDS_ARCH) 6029 > (elf_elfheader (obfd)->e_flags & EF_NDS_ARCH)) 6030 { 6031 elf_elfheader (obfd)->e_flags = 6032 convert_e_flags (elf_elfheader (obfd)->e_flags, 6033 (elf_elfheader (ibfd)->e_flags & EF_NDS_ARCH)); 6034 } 6035 else 6036 { 6037 elf_elfheader (ibfd)->e_flags = 6038 convert_e_flags (elf_elfheader (ibfd)->e_flags, 6039 (elf_elfheader (obfd)->e_flags & EF_NDS_ARCH)); 6040 } 6041 } 6042 6043 /* Extract some flags. */ 6044 in_flags = elf_elfheader (ibfd)->e_flags 6045 & (~(E_NDS32_HAS_REDUCED_REGS | EF_NDS32_ELF_VERSION 6046 | E_NDS32_HAS_NO_MAC_INST | E_NDS32_FPU_REG_CONF)); 6047 6048 /* The following flags need special treatment. */ 6049 in_16regs = elf_elfheader (ibfd)->e_flags & E_NDS32_HAS_REDUCED_REGS; 6050 in_no_mac = elf_elfheader (ibfd)->e_flags & E_NDS32_HAS_NO_MAC_INST; 6051 in_fpu_config = elf_elfheader (ibfd)->e_flags & E_NDS32_FPU_REG_CONF; 6052 6053 /* Extract some flags. */ 6054 out_flags = elf_elfheader (obfd)->e_flags 6055 & (~(E_NDS32_HAS_REDUCED_REGS | EF_NDS32_ELF_VERSION 6056 | E_NDS32_HAS_NO_MAC_INST | E_NDS32_FPU_REG_CONF)); 6057 6058 /* The following flags need special treatment. */ 6059 out_16regs = elf_elfheader (obfd)->e_flags & E_NDS32_HAS_REDUCED_REGS; 6060 out_no_mac = elf_elfheader (obfd)->e_flags & E_NDS32_HAS_NO_MAC_INST; 6061 out_fpu_config = elf_elfheader (obfd)->e_flags & E_NDS32_FPU_REG_CONF; 6062 out_version = elf_elfheader (obfd)->e_flags & EF_NDS32_ELF_VERSION; 6063 if (!elf_flags_init (obfd)) 6064 { 6065 /* If the input is the default architecture then do not 6066 bother setting the flags for the output architecture, 6067 instead allow future merges to do this. If no future 6068 merges ever set these flags then they will retain their 6069 unitialised values, which surprise surprise, correspond 6070 to the default values. */ 6071 if (bfd_get_arch_info (ibfd)->the_default) 6072 return TRUE; 6073 6074 elf_flags_init (obfd) = TRUE; 6075 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 6076 6077 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 6078 && bfd_get_arch_info (obfd)->the_default) 6079 { 6080 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 6081 bfd_get_mach (ibfd)); 6082 } 6083 6084 return TRUE; 6085 } 6086 6087 /* Check flag compatibility. */ 6088 if ((in_flags & EF_NDS_ABI) != (out_flags & EF_NDS_ABI)) 6089 { 6090 (*_bfd_error_handler) 6091 (_("%B: error: ABI mismatch with previous modules."), ibfd); 6092 6093 bfd_set_error (bfd_error_bad_value); 6094 return FALSE; 6095 } 6096 6097 if ((in_flags & EF_NDS_ARCH) != (out_flags & EF_NDS_ARCH)) 6098 { 6099 if (((in_flags & EF_NDS_ARCH) != E_N1_ARCH)) 6100 { 6101 (*_bfd_error_handler) 6102 (_("%B: error: Instruction set mismatch with previous modules."), ibfd); 6103 6104 bfd_set_error (bfd_error_bad_value); 6105 return FALSE; 6106 } 6107 } 6108 6109 /* When linking with V1.2 and V1.3 objects together the output is V1.2. 6110 and perf ext1 and DIV are mergerd to perf ext1. */ 6111 if (in_version == E_NDS32_ELF_VER_1_2 || out_version == E_NDS32_ELF_VER_1_2) 6112 { 6113 elf_elfheader (obfd)->e_flags = 6114 (in_flags & (~(E_NDS32_HAS_EXT_INST | E_NDS32_HAS_DIV_INST))) 6115 | (out_flags & (~(E_NDS32_HAS_EXT_INST | E_NDS32_HAS_DIV_INST))) 6116 | (((in_flags & (E_NDS32_HAS_EXT_INST | E_NDS32_HAS_DIV_INST))) 6117 ? E_NDS32_HAS_EXT_INST : 0) 6118 | (((out_flags & (E_NDS32_HAS_EXT_INST | E_NDS32_HAS_DIV_INST))) 6119 ? E_NDS32_HAS_EXT_INST : 0) 6120 | (in_16regs & out_16regs) | (in_no_mac & out_no_mac) 6121 | ((in_version > out_version) ? out_version : in_version); 6122 } 6123 else 6124 { 6125 if (in_version != out_version) 6126 (*_bfd_error_handler) (_("%B: warning: Incompatible elf-versions %s and %s."), 6127 ibfd, nds32_elfver_strtab[out_version], 6128 nds32_elfver_strtab[in_version]); 6129 6130 elf_elfheader (obfd)->e_flags = in_flags | out_flags 6131 | (in_16regs & out_16regs) | (in_no_mac & out_no_mac) 6132 | (in_fpu_config > out_fpu_config ? in_fpu_config : out_fpu_config) 6133 | (in_version > out_version ? out_version : in_version); 6134 } 6135 6136 return TRUE; 6137} 6138 6139/* Display the flags field. */ 6140 6141static bfd_boolean 6142nds32_elf_print_private_bfd_data (bfd *abfd, void *ptr) 6143{ 6144 FILE *file = (FILE *) ptr; 6145 6146 BFD_ASSERT (abfd != NULL && ptr != NULL); 6147 6148 _bfd_elf_print_private_bfd_data (abfd, ptr); 6149 6150 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 6151 6152 switch (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH) 6153 { 6154 default: 6155 case E_N1_ARCH: 6156 fprintf (file, _(": n1 instructions")); 6157 break; 6158 case E_N1H_ARCH: 6159 fprintf (file, _(": n1h instructions")); 6160 break; 6161 } 6162 6163 fputc ('\n', file); 6164 6165 return TRUE; 6166} 6167 6168static unsigned int 6169nds32_elf_action_discarded (asection *sec) 6170{ 6171 6172 if (strncmp 6173 (".gcc_except_table", sec->name, sizeof (".gcc_except_table") - 1) == 0) 6174 return 0; 6175 6176 return _bfd_elf_default_action_discarded (sec); 6177} 6178 6179static asection * 6180nds32_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, 6181 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, 6182 Elf_Internal_Sym *sym) 6183{ 6184 if (h != NULL) 6185 switch (ELF32_R_TYPE (rel->r_info)) 6186 { 6187 case R_NDS32_GNU_VTINHERIT: 6188 case R_NDS32_GNU_VTENTRY: 6189 case R_NDS32_RELA_GNU_VTINHERIT: 6190 case R_NDS32_RELA_GNU_VTENTRY: 6191 return NULL; 6192 } 6193 6194 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 6195} 6196 6197static bfd_boolean 6198nds32_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec, 6199 const Elf_Internal_Rela *relocs) 6200{ 6201 /* Update the got entry reference counts for the section being removed. */ 6202 Elf_Internal_Shdr *symtab_hdr; 6203 struct elf_link_hash_entry **sym_hashes; 6204 bfd_signed_vma *local_got_refcounts; 6205 const Elf_Internal_Rela *rel, *relend; 6206 6207 elf_section_data (sec)->local_dynrel = NULL; 6208 6209 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 6210 sym_hashes = elf_sym_hashes (abfd); 6211 local_got_refcounts = elf_local_got_refcounts (abfd); 6212 6213 relend = relocs + sec->reloc_count; 6214 for (rel = relocs; rel < relend; rel++) 6215 { 6216 unsigned long r_symndx; 6217 struct elf_link_hash_entry *h = NULL; 6218 6219 r_symndx = ELF32_R_SYM (rel->r_info); 6220 if (r_symndx >= symtab_hdr->sh_info) 6221 { 6222 /* External symbol. */ 6223 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 6224 while (h->root.type == bfd_link_hash_indirect 6225 || h->root.type == bfd_link_hash_warning) 6226 h = (struct elf_link_hash_entry *) h->root.u.i.link; 6227 } 6228 6229 switch (ELF32_R_TYPE (rel->r_info)) 6230 { 6231 case R_NDS32_GOT_HI20: 6232 case R_NDS32_GOT_LO12: 6233 case R_NDS32_GOT_LO15: 6234 case R_NDS32_GOT_LO19: 6235 case R_NDS32_GOT17S2_RELA: 6236 case R_NDS32_GOT15S2_RELA: 6237 case R_NDS32_GOTOFF: 6238 case R_NDS32_GOTOFF_HI20: 6239 case R_NDS32_GOTOFF_LO12: 6240 case R_NDS32_GOTOFF_LO15: 6241 case R_NDS32_GOTOFF_LO19: 6242 case R_NDS32_GOT20: 6243 case R_NDS32_GOTPC_HI20: 6244 case R_NDS32_GOTPC_LO12: 6245 case R_NDS32_GOTPC20: 6246 if (h != NULL) 6247 { 6248 if (h->got.refcount > 0) 6249 h->got.refcount--; 6250 } 6251 else 6252 { 6253 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 6254 local_got_refcounts[r_symndx]--; 6255 } 6256 break; 6257 6258 case R_NDS32_16_RELA: 6259 case R_NDS32_20_RELA: 6260 case R_NDS32_5_RELA: 6261 case R_NDS32_32_RELA: 6262 case R_NDS32_HI20_RELA: 6263 case R_NDS32_LO12S3_RELA: 6264 case R_NDS32_LO12S2_RELA: 6265 case R_NDS32_LO12S2_DP_RELA: 6266 case R_NDS32_LO12S2_SP_RELA: 6267 case R_NDS32_LO12S1_RELA: 6268 case R_NDS32_LO12S0_RELA: 6269 case R_NDS32_LO12S0_ORI_RELA: 6270 case R_NDS32_SDA16S3_RELA: 6271 case R_NDS32_SDA17S2_RELA: 6272 case R_NDS32_SDA18S1_RELA: 6273 case R_NDS32_SDA19S0_RELA: 6274 case R_NDS32_SDA15S3_RELA: 6275 case R_NDS32_SDA15S2_RELA: 6276 case R_NDS32_SDA12S2_DP_RELA: 6277 case R_NDS32_SDA12S2_SP_RELA: 6278 case R_NDS32_SDA15S1_RELA: 6279 case R_NDS32_SDA15S0_RELA: 6280 case R_NDS32_SDA_FP7U2_RELA: 6281 case R_NDS32_15_PCREL_RELA: 6282 case R_NDS32_17_PCREL_RELA: 6283 case R_NDS32_25_PCREL_RELA: 6284 if (h != NULL) 6285 { 6286 struct elf_nds32_link_hash_entry *eh; 6287 struct elf_nds32_dyn_relocs **pp; 6288 struct elf_nds32_dyn_relocs *p; 6289 6290 if (!info->shared && h->plt.refcount > 0) 6291 h->plt.refcount -= 1; 6292 6293 eh = (struct elf_nds32_link_hash_entry *) h; 6294 6295 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 6296 if (p->sec == sec) 6297 { 6298 if (ELF32_R_TYPE (rel->r_info) == R_NDS32_15_PCREL_RELA 6299 || ELF32_R_TYPE (rel->r_info) == R_NDS32_17_PCREL_RELA 6300 || ELF32_R_TYPE (rel->r_info) == R_NDS32_25_PCREL_RELA) 6301 p->pc_count -= 1; 6302 p->count -= 1; 6303 if (p->count == 0) 6304 *pp = p->next; 6305 break; 6306 } 6307 } 6308 break; 6309 6310 case R_NDS32_9_PLTREL: 6311 case R_NDS32_25_PLTREL: 6312 if (h != NULL) 6313 { 6314 if (h->plt.refcount > 0) 6315 h->plt.refcount--; 6316 } 6317 break; 6318 6319 default: 6320 break; 6321 } 6322 } 6323 6324 return TRUE; 6325} 6326 6327/* Look through the relocs for a section during the first phase. 6328 Since we don't do .gots or .plts, we just need to consider the 6329 virtual table relocs for gc. */ 6330 6331static bfd_boolean 6332nds32_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 6333 asection *sec, const Elf_Internal_Rela *relocs) 6334{ 6335 Elf_Internal_Shdr *symtab_hdr; 6336 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 6337 const Elf_Internal_Rela *rel; 6338 const Elf_Internal_Rela *rel_end; 6339 struct elf_nds32_link_hash_table *htab; 6340 bfd *dynobj; 6341 asection *sreloc = NULL; 6342 6343 if (info->relocatable) 6344 return TRUE; 6345 6346 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 6347 sym_hashes = elf_sym_hashes (abfd); 6348 sym_hashes_end = 6349 sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); 6350 if (!elf_bad_symtab (abfd)) 6351 sym_hashes_end -= symtab_hdr->sh_info; 6352 6353 htab = nds32_elf_hash_table (info); 6354 dynobj = htab->root.dynobj; 6355 6356 rel_end = relocs + sec->reloc_count; 6357 for (rel = relocs; rel < rel_end; rel++) 6358 { 6359 enum elf_nds32_reloc_type r_type; 6360 struct elf_link_hash_entry *h; 6361 unsigned long r_symndx; 6362 int tls_type, old_tls_type; 6363 6364 r_symndx = ELF32_R_SYM (rel->r_info); 6365 r_type = ELF32_R_TYPE (rel->r_info); 6366 if (r_symndx < symtab_hdr->sh_info) 6367 h = NULL; 6368 else 6369 { 6370 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 6371 while (h->root.type == bfd_link_hash_indirect 6372 || h->root.type == bfd_link_hash_warning) 6373 h = (struct elf_link_hash_entry *) h->root.u.i.link; 6374 } 6375 6376 /* Some relocs require a global offset table. We create 6377 got section here, since these relocation need got section 6378 and it is not created yet. */ 6379 if (htab->sgot == NULL) 6380 { 6381 switch (r_type) 6382 { 6383 case R_NDS32_GOT_HI20: 6384 case R_NDS32_GOT_LO12: 6385 case R_NDS32_GOT_LO15: 6386 case R_NDS32_GOT_LO19: 6387 case R_NDS32_GOT17S2_RELA: 6388 case R_NDS32_GOT15S2_RELA: 6389 case R_NDS32_GOTOFF: 6390 case R_NDS32_GOTOFF_HI20: 6391 case R_NDS32_GOTOFF_LO12: 6392 case R_NDS32_GOTOFF_LO15: 6393 case R_NDS32_GOTOFF_LO19: 6394 case R_NDS32_GOTPC20: 6395 case R_NDS32_GOTPC_HI20: 6396 case R_NDS32_GOTPC_LO12: 6397 case R_NDS32_GOT20: 6398 case R_NDS32_TLS_IE_HI20: 6399 case R_NDS32_TLS_IE_LO12S2: 6400 if (dynobj == NULL) 6401 htab->root.dynobj = dynobj = abfd; 6402 if (!create_got_section (dynobj, info)) 6403 return FALSE; 6404 break; 6405 6406 default: 6407 break; 6408 } 6409 } 6410 6411 switch ((int) r_type) 6412 { 6413 case R_NDS32_GOT_HI20: 6414 case R_NDS32_GOT_LO12: 6415 case R_NDS32_GOT_LO15: 6416 case R_NDS32_GOT_LO19: 6417 case R_NDS32_GOT20: 6418 case R_NDS32_TLS_IE_HI20: 6419 case R_NDS32_TLS_IE_LO12S2: 6420 switch (r_type) 6421 { 6422 case R_NDS32_TLS_IE_HI20: 6423 case R_NDS32_TLS_IE_LO12S2: 6424 tls_type = GOT_TLS_IE; 6425 break; 6426 default: 6427 tls_type = GOT_NORMAL; 6428 break; 6429 } 6430 if (h != NULL) 6431 { 6432 old_tls_type = elf32_nds32_hash_entry (h)->tls_type; 6433 h->got.refcount += 1; 6434 } 6435 else 6436 { 6437 bfd_signed_vma *local_got_refcounts; 6438 6439 /* This is a global offset table entry for a local 6440 symbol. */ 6441 local_got_refcounts = elf_local_got_refcounts (abfd); 6442 if (local_got_refcounts == NULL) 6443 { 6444 bfd_size_type size; 6445 6446 size = symtab_hdr->sh_info; 6447 size *= sizeof (bfd_signed_vma); 6448 local_got_refcounts = (bfd_signed_vma *) bfd_zalloc (abfd, size); 6449 if (local_got_refcounts == NULL) 6450 return FALSE; 6451 elf_local_got_refcounts (abfd) = local_got_refcounts; 6452 } 6453 local_got_refcounts[r_symndx] += 1; 6454 old_tls_type = elf32_nds32_local_got_tls_type (abfd)[r_symndx]; 6455 } 6456 6457 /* We will already have issued an error message if there 6458 is a TLS/non-TLS mismatch, based on the symbol 6459 type. So just combine any TLS types needed. */ 6460 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL 6461 && tls_type != GOT_NORMAL) 6462 tls_type |= old_tls_type; 6463 6464 if (old_tls_type != tls_type) 6465 { 6466 if (h != NULL) 6467 elf32_nds32_hash_entry (h)->tls_type = tls_type; 6468 else 6469 elf32_nds32_local_got_tls_type (abfd)[r_symndx] = tls_type; 6470 } 6471 break; 6472 case R_NDS32_9_PLTREL: 6473 case R_NDS32_25_PLTREL: 6474 case R_NDS32_PLTREL_HI20: 6475 case R_NDS32_PLTREL_LO12: 6476 case R_NDS32_PLT_GOTREL_HI20: 6477 case R_NDS32_PLT_GOTREL_LO12: 6478 case R_NDS32_PLT_GOTREL_LO15: 6479 case R_NDS32_PLT_GOTREL_LO19: 6480 case R_NDS32_PLT_GOTREL_LO20: 6481 6482 /* This symbol requires a procedure linkage table entry. We 6483 actually build the entry in adjust_dynamic_symbol, 6484 because this might be a case of linking PIC code without 6485 linking in any dynamic objects, in which case we don't 6486 need to generate a procedure linkage table after all. */ 6487 6488 /* If this is a local symbol, we resolve it directly without 6489 creating a procedure linkage table entry. */ 6490 if (h == NULL) 6491 continue; 6492 6493 if (h->forced_local) 6494 break; 6495 6496 elf32_nds32_hash_entry (h)->tls_type = GOT_NORMAL; 6497 h->needs_plt = 1; 6498 h->plt.refcount += 1; 6499 break; 6500 6501 case R_NDS32_16_RELA: 6502 case R_NDS32_20_RELA: 6503 case R_NDS32_5_RELA: 6504 case R_NDS32_32_RELA: 6505 case R_NDS32_HI20_RELA: 6506 case R_NDS32_LO12S3_RELA: 6507 case R_NDS32_LO12S2_RELA: 6508 case R_NDS32_LO12S2_DP_RELA: 6509 case R_NDS32_LO12S2_SP_RELA: 6510 case R_NDS32_LO12S1_RELA: 6511 case R_NDS32_LO12S0_RELA: 6512 case R_NDS32_LO12S0_ORI_RELA: 6513 case R_NDS32_SDA16S3_RELA: 6514 case R_NDS32_SDA17S2_RELA: 6515 case R_NDS32_SDA18S1_RELA: 6516 case R_NDS32_SDA19S0_RELA: 6517 case R_NDS32_SDA15S3_RELA: 6518 case R_NDS32_SDA15S2_RELA: 6519 case R_NDS32_SDA12S2_DP_RELA: 6520 case R_NDS32_SDA12S2_SP_RELA: 6521 case R_NDS32_SDA15S1_RELA: 6522 case R_NDS32_SDA15S0_RELA: 6523 case R_NDS32_SDA_FP7U2_RELA: 6524 case R_NDS32_15_PCREL_RELA: 6525 case R_NDS32_17_PCREL_RELA: 6526 case R_NDS32_25_PCREL_RELA: 6527 6528 if (h != NULL && !info->shared) 6529 { 6530 h->non_got_ref = 1; 6531 h->plt.refcount += 1; 6532 } 6533 6534 /* If we are creating a shared library, and this is a reloc against 6535 a global symbol, or a non PC relative reloc against a local 6536 symbol, then we need to copy the reloc into the shared library. 6537 However, if we are linking with -Bsymbolic, we do not need to 6538 copy a reloc against a global symbol which is defined in an 6539 object we are including in the link (i.e., DEF_REGULAR is set). 6540 At this point we have not seen all the input files, so it is 6541 possible that DEF_REGULAR is not set now but will be set later 6542 (it is never cleared). We account for that possibility below by 6543 storing information in the dyn_relocs field of the hash table 6544 entry. A similar situation occurs when creating shared libraries 6545 and symbol visibility changes render the symbol local. 6546 6547 If on the other hand, we are creating an executable, we may need 6548 to keep relocations for symbols satisfied by a dynamic library 6549 if we manage to avoid copy relocs for the symbol. */ 6550 if ((info->shared 6551 && (sec->flags & SEC_ALLOC) != 0 6552 && ((r_type != R_NDS32_25_PCREL_RELA 6553 && r_type != R_NDS32_15_PCREL_RELA 6554 && r_type != R_NDS32_17_PCREL_RELA 6555 && !(r_type == R_NDS32_32_RELA 6556 && strcmp (sec->name, ".eh_frame") == 0)) 6557 || (h != NULL 6558 && (!info->symbolic 6559 || h->root.type == bfd_link_hash_defweak 6560 || !h->def_regular)))) 6561 || (!info->shared 6562 && (sec->flags & SEC_ALLOC) != 0 6563 && h != NULL 6564 && (h->root.type == bfd_link_hash_defweak 6565 || !h->def_regular))) 6566 { 6567 struct elf_nds32_dyn_relocs *p; 6568 struct elf_nds32_dyn_relocs **head; 6569 6570 if (dynobj == NULL) 6571 htab->root.dynobj = dynobj = abfd; 6572 6573 /* When creating a shared object, we must copy these 6574 relocs into the output file. We create a reloc 6575 section in dynobj and make room for the reloc. */ 6576 if (sreloc == NULL) 6577 { 6578 const char *name; 6579 6580 name = bfd_elf_string_from_elf_section 6581 (abfd, elf_elfheader (abfd)->e_shstrndx, 6582 elf_section_data (sec)->rela.hdr->sh_name); 6583 if (name == NULL) 6584 return FALSE; 6585 6586 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 6587 && strcmp (bfd_get_section_name (abfd, sec), 6588 name + 5) == 0); 6589 6590 sreloc = bfd_get_section_by_name (dynobj, name); 6591 if (sreloc == NULL) 6592 { 6593 flagword flags; 6594 6595 sreloc = bfd_make_section (dynobj, name); 6596 flags = (SEC_HAS_CONTENTS | SEC_READONLY 6597 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 6598 if ((sec->flags & SEC_ALLOC) != 0) 6599 flags |= SEC_ALLOC | SEC_LOAD; 6600 if (sreloc == NULL 6601 || !bfd_set_section_flags (dynobj, sreloc, flags) 6602 || !bfd_set_section_alignment (dynobj, sreloc, 2)) 6603 return FALSE; 6604 6605 elf_section_type (sreloc) = SHT_RELA; 6606 } 6607 elf_section_data (sec)->sreloc = sreloc; 6608 } 6609 6610 /* If this is a global symbol, we count the number of 6611 relocations we need for this symbol. */ 6612 if (h != NULL) 6613 head = &((struct elf_nds32_link_hash_entry *) h)->dyn_relocs; 6614 else 6615 { 6616 asection *s; 6617 6618 Elf_Internal_Sym *isym; 6619 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); 6620 if (isym == NULL) 6621 return FALSE; 6622 6623 /* Track dynamic relocs needed for local syms too. */ 6624 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 6625 if (s == NULL) 6626 return FALSE; 6627 6628 head = ((struct elf_nds32_dyn_relocs **) 6629 &elf_section_data (s)->local_dynrel); 6630 } 6631 6632 p = *head; 6633 if (p == NULL || p->sec != sec) 6634 { 6635 bfd_size_type amt = sizeof (*p); 6636 p = (struct elf_nds32_dyn_relocs *) bfd_alloc (dynobj, amt); 6637 if (p == NULL) 6638 return FALSE; 6639 p->next = *head; 6640 *head = p; 6641 p->sec = sec; 6642 p->count = 0; 6643 p->pc_count = 0; 6644 } 6645 6646 p->count += 1; 6647 if (ELF32_R_TYPE (rel->r_info) == R_NDS32_25_PCREL_RELA 6648 || ELF32_R_TYPE (rel->r_info) == R_NDS32_15_PCREL_RELA 6649 || ELF32_R_TYPE (rel->r_info) == R_NDS32_17_PCREL_RELA) 6650 p->pc_count += 1; 6651 } 6652 break; 6653 6654 /* This relocation describes the C++ object vtable hierarchy. 6655 Reconstruct it for later use during GC. */ 6656 case R_NDS32_RELA_GNU_VTINHERIT: 6657 case R_NDS32_GNU_VTINHERIT: 6658 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 6659 return FALSE; 6660 break; 6661 6662 /* This relocation describes which C++ vtable entries are actually 6663 used. Record for later use during GC. */ 6664 case R_NDS32_GNU_VTENTRY: 6665 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 6666 return FALSE; 6667 break; 6668 case R_NDS32_RELA_GNU_VTENTRY: 6669 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 6670 return FALSE; 6671 break; 6672 } 6673 } 6674 6675 return TRUE; 6676} 6677 6678/* Write VAL in uleb128 format to P, returning a pointer to the 6679 following byte. 6680 This code is copied from elf-attr.c. */ 6681 6682static bfd_byte * 6683write_uleb128 (bfd_byte *p, unsigned int val) 6684{ 6685 bfd_byte c; 6686 do 6687 { 6688 c = val & 0x7f; 6689 val >>= 7; 6690 if (val) 6691 c |= 0x80; 6692 *(p++) = c; 6693 } 6694 while (val); 6695 return p; 6696} 6697 6698static bfd_signed_vma 6699calculate_offset (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 6700 Elf_Internal_Sym *isymbuf, Elf_Internal_Shdr *symtab_hdr, 6701 int *pic_ext_target) 6702{ 6703 bfd_signed_vma foff; 6704 bfd_vma symval, addend; 6705 asection *sym_sec; 6706 6707 /* Get the value of the symbol referred to by the reloc. */ 6708 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 6709 { 6710 Elf_Internal_Sym *isym; 6711 6712 /* A local symbol. */ 6713 isym = isymbuf + ELF32_R_SYM (irel->r_info); 6714 6715 if (isym->st_shndx == SHN_UNDEF) 6716 sym_sec = bfd_und_section_ptr; 6717 else if (isym->st_shndx == SHN_ABS) 6718 sym_sec = bfd_abs_section_ptr; 6719 else if (isym->st_shndx == SHN_COMMON) 6720 sym_sec = bfd_com_section_ptr; 6721 else 6722 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 6723 symval = isym->st_value + sym_sec->output_section->vma 6724 + sym_sec->output_offset; 6725 } 6726 else 6727 { 6728 unsigned long indx; 6729 struct elf_link_hash_entry *h; 6730 bfd *owner; 6731 6732 /* An external symbol. */ 6733 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 6734 h = elf_sym_hashes (abfd)[indx]; 6735 BFD_ASSERT (h != NULL); 6736 6737 if (h->root.type != bfd_link_hash_defined 6738 && h->root.type != bfd_link_hash_defweak) 6739 /* This appears to be a reference to an undefined 6740 symbol. Just ignore it--it will be caught by the 6741 regular reloc processing. */ 6742 return 0; 6743 owner = h->root.u.def.section->owner; 6744 if (owner && (elf_elfheader (owner)->e_flags & E_NDS32_HAS_PIC)) 6745 *pic_ext_target = 1; 6746 6747 if (h->root.u.def.section->flags & SEC_MERGE) 6748 { 6749 sym_sec = h->root.u.def.section; 6750 symval = _bfd_merged_section_offset (abfd, &sym_sec, 6751 elf_section_data (sym_sec)->sec_info, 6752 h->root.u.def.value); 6753 symval = symval + sym_sec->output_section->vma 6754 + sym_sec->output_offset; 6755 } 6756 else 6757 symval = (h->root.u.def.value 6758 + h->root.u.def.section->output_section->vma 6759 + h->root.u.def.section->output_offset); 6760 } 6761 6762 addend = irel->r_addend; 6763 6764 foff = (symval + addend 6765 - (irel->r_offset + sec->output_section->vma + sec->output_offset)); 6766 return foff; 6767} 6768 6769static bfd_vma 6770calculate_plt_memory_address (bfd *abfd, struct bfd_link_info *link_info, 6771 Elf_Internal_Sym *isymbuf, 6772 Elf_Internal_Rela *irel, 6773 Elf_Internal_Shdr *symtab_hdr) 6774{ 6775 bfd_vma symval; 6776 6777 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 6778 { 6779 Elf_Internal_Sym *isym; 6780 asection *sym_sec; 6781 /* A local symbol. */ 6782 isym = isymbuf + ELF32_R_SYM (irel->r_info); 6783 6784 if (isym->st_shndx == SHN_UNDEF) 6785 sym_sec = bfd_und_section_ptr; 6786 else if (isym->st_shndx == SHN_ABS) 6787 sym_sec = bfd_abs_section_ptr; 6788 else if (isym->st_shndx == SHN_COMMON) 6789 sym_sec = bfd_com_section_ptr; 6790 else 6791 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 6792 symval = isym->st_value + sym_sec->output_section->vma 6793 + sym_sec->output_offset; 6794 } 6795 else 6796 { 6797 unsigned long indx; 6798 struct elf_link_hash_entry *h; 6799 struct elf_nds32_link_hash_table *htab; 6800 asection *splt; 6801 6802 /* An external symbol. */ 6803 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 6804 h = elf_sym_hashes (abfd)[indx]; 6805 BFD_ASSERT (h != NULL); 6806 htab = nds32_elf_hash_table (link_info); 6807 splt = htab->splt; 6808 6809 while (h->root.type == bfd_link_hash_indirect 6810 || h->root.type == bfd_link_hash_warning) 6811 h = (struct elf_link_hash_entry *) h->root.u.i.link; 6812 6813 if (h->plt.offset == (bfd_vma) - 1) 6814 { 6815 if (h->root.type != bfd_link_hash_defined 6816 && h->root.type != bfd_link_hash_defweak) 6817 /* This appears to be a reference to an undefined 6818 * symbol. Just ignore it--it will be caught by the 6819 * regular reloc processing. */ 6820 return 0; 6821 symval = (h->root.u.def.value 6822 + h->root.u.def.section->output_section->vma 6823 + h->root.u.def.section->output_offset); 6824 } 6825 else 6826 symval = splt->output_section->vma + h->plt.offset; 6827 } 6828 6829 return symval; 6830} 6831 6832static bfd_signed_vma 6833calculate_plt_offset (bfd *abfd, asection *sec, struct bfd_link_info *link_info, 6834 Elf_Internal_Sym *isymbuf, Elf_Internal_Rela *irel, 6835 Elf_Internal_Shdr *symtab_hdr) 6836{ 6837 bfd_vma foff; 6838 if ((foff = calculate_plt_memory_address (abfd, link_info, isymbuf, irel, 6839 symtab_hdr)) == 0) 6840 return 0; 6841 else 6842 return foff - (irel->r_offset 6843 + sec->output_section->vma + sec->output_offset); 6844} 6845 6846/* Convert a 32-bit instruction to 16-bit one. 6847 INSN is the input 32-bit instruction, INSN16 is the output 16-bit 6848 instruction. If INSN_TYPE is not NULL, it the CGEN instruction 6849 type of INSN16. Return 1 if successful. */ 6850 6851static int 6852nds32_convert_32_to_16_alu1 (bfd *abfd, uint32_t insn, uint16_t *pinsn16, 6853 int *pinsn_type) 6854{ 6855 uint16_t insn16 = 0; 6856 int insn_type; 6857 unsigned long mach = bfd_get_mach (abfd); 6858 6859 if (N32_SH5 (insn) != 0) 6860 return 0; 6861 6862 switch (N32_SUB5 (insn)) 6863 { 6864 case N32_ALU1_ADD_SLLI: 6865 case N32_ALU1_ADD_SRLI: 6866 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) && N32_IS_RB3 (insn)) 6867 { 6868 insn16 = N16_TYPE333 (ADD333, N32_RT5 (insn), N32_RA5 (insn), 6869 N32_RB5 (insn)); 6870 insn_type = NDS32_INSN_ADD333; 6871 } 6872 else if (N32_IS_RT4 (insn)) 6873 { 6874 if (N32_RT5 (insn) == N32_RA5 (insn)) 6875 insn16 = N16_TYPE45 (ADD45, N32_RT54 (insn), N32_RB5 (insn)); 6876 else if (N32_RT5 (insn) == N32_RB5 (insn)) 6877 insn16 = N16_TYPE45 (ADD45, N32_RT54 (insn), N32_RA5 (insn)); 6878 insn_type = NDS32_INSN_ADD45; 6879 } 6880 break; 6881 6882 case N32_ALU1_SUB_SLLI: 6883 case N32_ALU1_SUB_SRLI: 6884 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) && N32_IS_RB3 (insn)) 6885 { 6886 insn16 = N16_TYPE333 (SUB333, N32_RT5 (insn), N32_RA5 (insn), 6887 N32_RB5 (insn)); 6888 insn_type = NDS32_INSN_SUB333; 6889 } 6890 else if (N32_IS_RT4 (insn) && N32_RT5 (insn) == N32_RA5 (insn)) 6891 { 6892 insn16 = N16_TYPE45 (SUB45, N32_RT54 (insn), N32_RB5 (insn)); 6893 insn_type = NDS32_INSN_SUB45; 6894 } 6895 break; 6896 6897 case N32_ALU1_AND_SLLI: 6898 case N32_ALU1_AND_SRLI: 6899 /* and $rt, $rt, $rb -> and33 for v3, v3m. */ 6900 if (mach >= MACH_V3 && N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 6901 && N32_IS_RB3 (insn)) 6902 { 6903 if (N32_RT5 (insn) == N32_RA5 (insn)) 6904 insn16 = N16_MISC33 (AND33, N32_RT5 (insn), N32_RB5 (insn)); 6905 else if (N32_RT5 (insn) == N32_RB5 (insn)) 6906 insn16 = N16_MISC33 (AND33, N32_RT5 (insn), N32_RA5 (insn)); 6907 if (insn16) 6908 insn_type = NDS32_INSN_AND33; 6909 } 6910 break; 6911 6912 case N32_ALU1_XOR_SLLI: 6913 case N32_ALU1_XOR_SRLI: 6914 /* xor $rt, $rt, $rb -> xor33 for v3, v3m. */ 6915 if (mach >= MACH_V3 && N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 6916 && N32_IS_RB3 (insn)) 6917 { 6918 if (N32_RT5 (insn) == N32_RA5 (insn)) 6919 insn16 = N16_MISC33 (XOR33, N32_RT5 (insn), N32_RB5 (insn)); 6920 else if (N32_RT5 (insn) == N32_RB5 (insn)) 6921 insn16 = N16_MISC33 (XOR33, N32_RT5 (insn), N32_RA5 (insn)); 6922 if (insn16) 6923 insn_type = NDS32_INSN_XOR33; 6924 } 6925 break; 6926 6927 case N32_ALU1_OR_SLLI: 6928 case N32_ALU1_OR_SRLI: 6929 /* or $rt, $rt, $rb -> or33 for v3, v3m. */ 6930 if (mach >= MACH_V3 && N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 6931 && N32_IS_RB3 (insn)) 6932 { 6933 if (N32_RT5 (insn) == N32_RA5 (insn)) 6934 insn16 = N16_MISC33 (OR33, N32_RT5 (insn), N32_RB5 (insn)); 6935 else if (N32_RT5 (insn) == N32_RB5 (insn)) 6936 insn16 = N16_MISC33 (OR33, N32_RT5 (insn), N32_RA5 (insn)); 6937 if (insn16) 6938 insn_type = NDS32_INSN_OR33; 6939 } 6940 break; 6941 case N32_ALU1_NOR: 6942 /* nor $rt, $ra, $ra -> not33 for v3, v3m. */ 6943 if (mach >= MACH_V3 && N32_IS_RT3 (insn) && N32_IS_RB3 (insn) 6944 && N32_RA5 (insn) == N32_RB5 (insn)) 6945 { 6946 insn16 = N16_MISC33 (NOT33, N32_RT5 (insn), N32_RA5 (insn)); 6947 insn_type = NDS32_INSN_NOT33; 6948 } 6949 break; 6950 case N32_ALU1_SRAI: 6951 if (N32_IS_RT4 (insn) && N32_RT5 (insn) == N32_RA5 (insn)) 6952 { 6953 insn16 = N16_TYPE45 (SRAI45, N32_RT54 (insn), N32_UB5 (insn)); 6954 insn_type = NDS32_INSN_SRAI45; 6955 } 6956 break; 6957 6958 case N32_ALU1_SRLI: 6959 if (N32_IS_RT4 (insn) && N32_RT5 (insn) == N32_RA5 (insn)) 6960 { 6961 insn16 = N16_TYPE45 (SRLI45, N32_RT54 (insn), N32_UB5 (insn)); 6962 insn_type = NDS32_INSN_SRLI45; 6963 } 6964 break; 6965 6966 case N32_ALU1_SLLI: 6967 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) && N32_UB5 (insn) < 8) 6968 { 6969 insn16 = N16_TYPE333 (SLLI333, N32_RT5 (insn), N32_RA5 (insn), 6970 N32_UB5 (insn)); 6971 insn_type = NDS32_INSN_SLLI333; 6972 } 6973 break; 6974 6975 case N32_ALU1_ZEH: 6976 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn)) 6977 { 6978 insn16 = N16_BFMI333 (ZEH33, N32_RT5 (insn), N32_RA5 (insn)); 6979 insn_type = NDS32_INSN_ZEH33; 6980 } 6981 break; 6982 6983 case N32_ALU1_SEB: 6984 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn)) 6985 { 6986 insn16 = N16_BFMI333 (SEB33, N32_RT5 (insn), N32_RA5 (insn)); 6987 insn_type = NDS32_INSN_SEB33; 6988 } 6989 break; 6990 6991 case N32_ALU1_SEH: 6992 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn)) 6993 { 6994 insn16 = N16_BFMI333 (SEH33, N32_RT5 (insn), N32_RA5 (insn)); 6995 insn_type = NDS32_INSN_SEH33; 6996 } 6997 break; 6998 6999 case N32_ALU1_SLT: 7000 if (N32_RT5 (insn) == REG_R15 && N32_IS_RA4 (insn)) 7001 { 7002 /* Implicit r15. */ 7003 insn16 = N16_TYPE45 (SLT45, N32_RA54 (insn), N32_RB5 (insn)); 7004 insn_type = NDS32_INSN_SLT45; 7005 } 7006 break; 7007 7008 case N32_ALU1_SLTS: 7009 if (N32_RT5 (insn) == REG_R15 && N32_IS_RA4 (insn)) 7010 { 7011 /* Implicit r15. */ 7012 insn16 = N16_TYPE45 (SLTS45, N32_RA54 (insn), N32_RB5 (insn)); 7013 insn_type = NDS32_INSN_SLTS45; 7014 } 7015 break; 7016 } 7017 7018 if ((insn16 & 0x8000) == 0) 7019 return 0; 7020 7021 if (pinsn16) 7022 *pinsn16 = insn16; 7023 if (pinsn_type) 7024 *pinsn_type = insn_type; 7025 return 1; 7026} 7027 7028static int 7029nds32_convert_32_to_16_alu2 (bfd *abfd, uint32_t insn, uint16_t *pinsn16, 7030 int *pinsn_type) 7031{ 7032 uint16_t insn16 = 0; 7033 int insn_type; 7034 unsigned long mach = bfd_get_mach (abfd); 7035 7036 /* TODO: bset, bclr, btgl, btst. */ 7037 if (__GF (insn, 6, 4) != 0) 7038 return 0; 7039 7040 switch (N32_IMMU (insn, 6)) 7041 { 7042 case N32_ALU2_MUL: 7043 if (mach >= MACH_V3 && N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7044 && N32_IS_RB3 (insn)) 7045 { 7046 if (N32_RT5 (insn) == N32_RA5 (insn)) 7047 insn16 = N16_MISC33 (MUL33, N32_RT5 (insn), N32_RB5 (insn)); 7048 else if (N32_RT5 (insn) == N32_RB5 (insn)) 7049 insn16 = N16_MISC33 (MUL33, N32_RT5 (insn), N32_RA5 (insn)); 7050 if (insn16) 7051 insn_type = NDS32_INSN_MUL33; 7052 } 7053 } 7054 7055 if ((insn16 & 0x8000) == 0) 7056 return 0; 7057 7058 if (pinsn16) 7059 *pinsn16 = insn16; 7060 if (pinsn_type) 7061 *pinsn_type = insn_type; 7062 return 1; 7063} 7064 7065int 7066nds32_convert_32_to_16 (bfd *abfd, uint32_t insn, uint16_t *pinsn16, 7067 int *pinsn_type) 7068{ 7069 int op6; 7070 uint16_t insn16 = 0; 7071 int insn_type; 7072 unsigned long mach = bfd_get_mach (abfd); 7073 7074 /* Decode 32-bit instruction. */ 7075 if (insn & 0x80000000) 7076 { 7077 /* Not 32-bit insn. */ 7078 return 0; 7079 } 7080 7081 op6 = N32_OP6 (insn); 7082 7083 /* Convert it to 16-bit instruction. */ 7084 switch (op6) 7085 { 7086 case N32_OP6_MOVI: 7087 if (IS_WITHIN_S (N32_IMM20S (insn), 5)) 7088 { 7089 insn16 = N16_TYPE55 (MOVI55, N32_RT5 (insn), N32_IMM20S (insn)); 7090 insn_type = NDS32_INSN_MOVI55; 7091 } 7092 else if (mach >= MACH_V3 && N32_IMM20S (insn) >= 16 7093 && N32_IMM20S (insn) < 48 && N32_IS_RT4 (insn)) 7094 { 7095 insn16 = N16_TYPE45 (MOVPI45, N32_RT54 (insn), 7096 N32_IMM20S (insn) - 16); 7097 insn_type = NDS32_INSN_MOVPI45; 7098 } 7099 break; 7100 7101 case N32_OP6_ADDI: 7102 if (N32_IMM15S (insn) == 0) 7103 { 7104 /* Do not convert `addi $sp, $sp, 0' to `mov55 $sp, $sp', 7105 because `mov55 $sp, $sp' is ifret16 in V3 ISA. */ 7106 if (mach <= MACH_V2 7107 || N32_RT5 (insn) != REG_SP || N32_RA5 (insn) != REG_SP) 7108 { 7109 insn16 = N16_TYPE55 (MOV55, N32_RT5 (insn), N32_RA5 (insn)); 7110 insn_type = NDS32_INSN_MOV55; 7111 } 7112 } 7113 else if (N32_IMM15S (insn) > 0) 7114 { 7115 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) && N32_IMM15S (insn) < 8) 7116 { 7117 insn16 = N16_TYPE333 (ADDI333, N32_RT5 (insn), N32_RA5 (insn), 7118 N32_IMM15S (insn)); 7119 insn_type = NDS32_INSN_ADDI333; 7120 } 7121 else if (N32_IS_RT4 (insn) && N32_RT5 (insn) == N32_RA5 (insn) 7122 && N32_IMM15S (insn) < 32) 7123 { 7124 insn16 = N16_TYPE45 (ADDI45, N32_RT54 (insn), N32_IMM15S (insn)); 7125 insn_type = NDS32_INSN_ADDI45; 7126 } 7127 else if (mach >= MACH_V2 && N32_RT5 (insn) == REG_SP 7128 && N32_RT5 (insn) == N32_RA5 (insn) 7129 && N32_IMM15S (insn) < 512) 7130 { 7131 insn16 = N16_TYPE10 (ADDI10S, N32_IMM15S (insn)); 7132 insn_type = NDS32_INSN_ADDI10_SP; 7133 } 7134 else if (mach >= MACH_V3 && N32_IS_RT3 (insn) 7135 && N32_RA5 (insn) == REG_SP && N32_IMM15S (insn) < 256 7136 && (N32_IMM15S (insn) % 4 == 0)) 7137 { 7138 insn16 = N16_TYPE36 (ADDRI36_SP, N32_RT5 (insn), 7139 N32_IMM15S (insn) >> 2); 7140 insn_type = NDS32_INSN_ADDRI36_SP; 7141 } 7142 } 7143 else 7144 { 7145 /* Less than 0. */ 7146 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) && N32_IMM15S (insn) > -8) 7147 { 7148 insn16 = N16_TYPE333 (SUBI333, N32_RT5 (insn), N32_RA5 (insn), 7149 0 - N32_IMM15S (insn)); 7150 insn_type = NDS32_INSN_SUBI333; 7151 } 7152 else if (N32_IS_RT4 (insn) && N32_RT5 (insn) == N32_RA5 (insn) 7153 && N32_IMM15S (insn) > -32) 7154 { 7155 insn16 = N16_TYPE45 (SUBI45, N32_RT54 (insn), 7156 0 - N32_IMM15S (insn)); 7157 insn_type = NDS32_INSN_SUBI45; 7158 } 7159 else if (mach >= MACH_V2 && N32_RT5 (insn) == REG_SP 7160 && N32_RT5 (insn) == N32_RA5 (insn) 7161 && N32_IMM15S (insn) >= -512) 7162 { 7163 insn16 = N16_TYPE10 (ADDI10S, N32_IMM15S (insn)); 7164 insn_type = NDS32_INSN_ADDI10_SP; 7165 } 7166 } 7167 break; 7168 7169 case N32_OP6_ORI: 7170 if (N32_IMM15S (insn) == 0) 7171 { 7172 /* Do not convert `ori $sp, $sp, 0' to `mov55 $sp, $sp', 7173 because `mov55 $sp, $sp' is ifret16 in V3 ISA. */ 7174 if (mach <= MACH_V2 7175 || N32_RT5 (insn) != REG_SP || N32_RA5 (insn) != REG_SP) 7176 { 7177 insn16 = N16_TYPE55 (MOV55, N32_RT5 (insn), N32_RA5 (insn)); 7178 insn_type = NDS32_INSN_MOV55; 7179 } 7180 } 7181 break; 7182 7183 case N32_OP6_SUBRI: 7184 if (mach >= MACH_V3 && N32_IS_RT3 (insn) 7185 && N32_IS_RA3 (insn) && N32_IMM15S (insn) == 0) 7186 { 7187 insn16 = N16_MISC33 (NEG33, N32_RT5 (insn), N32_RA5 (insn)); 7188 insn_type = NDS32_INSN_NEG33; 7189 } 7190 break; 7191 7192 case N32_OP6_ANDI: 7193 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn)) 7194 { 7195 if (N32_IMM15U (insn) == 1) 7196 { 7197 insn16 = N16_BFMI333 (XLSB33, N32_RT5 (insn), N32_RA5 (insn)); 7198 insn_type = NDS32_INSN_XLSB33; 7199 } 7200 else if (N32_IMM15U (insn) == 0x7ff) 7201 { 7202 insn16 = N16_BFMI333 (X11B33, N32_RT5 (insn), N32_RA5 (insn)); 7203 insn_type = NDS32_INSN_X11B33; 7204 } 7205 else if (N32_IMM15U (insn) == 0xff) 7206 { 7207 insn16 = N16_BFMI333 (ZEB33, N32_RT5 (insn), N32_RA5 (insn)); 7208 insn_type = NDS32_INSN_ZEB33; 7209 } 7210 else if (mach >= MACH_V3 && N32_RT5 (insn) == N32_RA5 (insn) 7211 && N32_IMM15U (insn) < 256) 7212 { 7213 int imm15u = N32_IMM15U (insn); 7214 7215 if (__builtin_popcount (imm15u) == 1) 7216 { 7217 /* BMSKI33 */ 7218 int imm3u = __builtin_ctz (imm15u); 7219 7220 insn16 = N16_BFMI333 (BMSKI33, N32_RT5 (insn), imm3u); 7221 insn_type = NDS32_INSN_BMSKI33; 7222 } 7223 else if (imm15u != 0 && __builtin_popcount (imm15u + 1) == 1) 7224 { 7225 /* FEXTI33 */ 7226 int imm3u = __builtin_ctz (imm15u + 1) - 1; 7227 7228 insn16 = N16_BFMI333 (FEXTI33, N32_RT5 (insn), imm3u); 7229 insn_type = NDS32_INSN_FEXTI33; 7230 } 7231 } 7232 } 7233 break; 7234 7235 case N32_OP6_SLTI: 7236 if (N32_RT5 (insn) == REG_R15 && N32_IS_RA4 (insn) 7237 && IS_WITHIN_U (N32_IMM15S (insn), 5)) 7238 { 7239 insn16 = N16_TYPE45 (SLTI45, N32_RA54 (insn), N32_IMM15S (insn)); 7240 insn_type = NDS32_INSN_SLTI45; 7241 } 7242 break; 7243 7244 case N32_OP6_SLTSI: 7245 if (N32_RT5 (insn) == REG_R15 && N32_IS_RA4 (insn) 7246 && IS_WITHIN_U (N32_IMM15S (insn), 5)) 7247 { 7248 insn16 = N16_TYPE45 (SLTSI45, N32_RA54 (insn), N32_IMM15S (insn)); 7249 insn_type = NDS32_INSN_SLTSI45; 7250 } 7251 break; 7252 7253 case N32_OP6_LWI: 7254 if (N32_IS_RT4 (insn) && N32_IMM15S (insn) == 0) 7255 { 7256 insn16 = N16_TYPE45 (LWI450, N32_RT54 (insn), N32_RA5 (insn)); 7257 insn_type = NDS32_INSN_LWI450; 7258 } 7259 else if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7260 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7261 { 7262 insn16 = N16_TYPE333 (LWI333, N32_RT5 (insn), N32_RA5 (insn), 7263 N32_IMM15S (insn)); 7264 insn_type = NDS32_INSN_LWI333; 7265 } 7266 else if (N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_FP 7267 && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7268 { 7269 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 0, N32_IMM15S (insn)); 7270 insn_type = NDS32_INSN_LWI37; 7271 } 7272 else if (mach >= MACH_V2 && N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_SP 7273 && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7274 { 7275 insn16 = N16_TYPE37 (XWI37SP, N32_RT5 (insn), 0, N32_IMM15S (insn)); 7276 insn_type = NDS32_INSN_LWI37_SP; 7277 } 7278 else if (mach >= MACH_V2 && N32_IS_RT4 (insn) && N32_RA5 (insn) == REG_R8 7279 && -32 <= N32_IMM15S (insn) && N32_IMM15S (insn) < 0) 7280 { 7281 insn16 = N16_TYPE45 (LWI45_FE, N32_RT54 (insn), 7282 N32_IMM15S (insn) + 32); 7283 insn_type = NDS32_INSN_LWI45_FE; 7284 } 7285 break; 7286 7287 case N32_OP6_SWI: 7288 if (N32_IS_RT4 (insn) && N32_IMM15S (insn) == 0) 7289 { 7290 insn16 = N16_TYPE45 (SWI450, N32_RT54 (insn), N32_RA5 (insn)); 7291 insn_type = NDS32_INSN_SWI450; 7292 } 7293 else if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7294 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7295 { 7296 insn16 = N16_TYPE333 (SWI333, N32_RT5 (insn), N32_RA5 (insn), 7297 N32_IMM15S (insn)); 7298 insn_type = NDS32_INSN_SWI333; 7299 } 7300 else if (N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_FP 7301 && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7302 { 7303 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 1, N32_IMM15S (insn)); 7304 insn_type = NDS32_INSN_SWI37; 7305 } 7306 else if (mach >= MACH_V2 && N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_SP 7307 && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7308 { 7309 insn16 = N16_TYPE37 (XWI37SP, N32_RT5 (insn), 1, N32_IMM15S (insn)); 7310 insn_type = NDS32_INSN_SWI37_SP; 7311 } 7312 break; 7313 7314 case N32_OP6_LWI_BI: 7315 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7316 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7317 { 7318 insn16 = N16_TYPE333 (LWI333_BI, N32_RT5 (insn), N32_RA5 (insn), 7319 N32_IMM15S (insn)); 7320 insn_type = NDS32_INSN_LWI333_BI; 7321 } 7322 break; 7323 7324 case N32_OP6_SWI_BI: 7325 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7326 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7327 { 7328 insn16 = N16_TYPE333 (SWI333_BI, N32_RT5 (insn), N32_RA5 (insn), 7329 N32_IMM15S (insn)); 7330 insn_type = NDS32_INSN_SWI333_BI; 7331 } 7332 break; 7333 7334 case N32_OP6_LHI: 7335 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7336 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7337 { 7338 insn16 = N16_TYPE333 (LHI333, N32_RT5 (insn), N32_RA5 (insn), 7339 N32_IMM15S (insn)); 7340 insn_type = NDS32_INSN_LHI333; 7341 } 7342 break; 7343 7344 case N32_OP6_SHI: 7345 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7346 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7347 { 7348 insn16 = N16_TYPE333 (SHI333, N32_RT5 (insn), N32_RA5 (insn), 7349 N32_IMM15S (insn)); 7350 insn_type = NDS32_INSN_SHI333; 7351 } 7352 break; 7353 7354 case N32_OP6_LBI: 7355 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7356 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7357 { 7358 insn16 = N16_TYPE333 (LBI333, N32_RT5 (insn), N32_RA5 (insn), 7359 N32_IMM15S (insn)); 7360 insn_type = NDS32_INSN_LBI333; 7361 } 7362 break; 7363 7364 case N32_OP6_SBI: 7365 if (N32_IS_RT3 (insn) && N32_IS_RA3 (insn) 7366 && IS_WITHIN_U (N32_IMM15S (insn), 3)) 7367 { 7368 insn16 = N16_TYPE333 (SBI333, N32_RT5 (insn), N32_RA5 (insn), 7369 N32_IMM15S (insn)); 7370 insn_type = NDS32_INSN_SBI333; 7371 } 7372 break; 7373 7374 case N32_OP6_ALU1: 7375 return nds32_convert_32_to_16_alu1 (abfd, insn, pinsn16, pinsn_type); 7376 7377 case N32_OP6_ALU2: 7378 return nds32_convert_32_to_16_alu2 (abfd, insn, pinsn16, pinsn_type); 7379 7380 case N32_OP6_BR1: 7381 if (!IS_WITHIN_S (N32_IMM14S (insn), 8)) 7382 goto done; 7383 7384 if ((insn & __BIT (14)) == 0) 7385 { 7386 /* N32_BR1_BEQ */ 7387 if (N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_R5 7388 && N32_RT5 (insn) != REG_R5) 7389 insn16 = N16_TYPE38 (BEQS38, N32_RT5 (insn), N32_IMM14S (insn)); 7390 else if (N32_IS_RA3 (insn) && N32_RT5 (insn) == REG_R5 7391 && N32_RA5 (insn) != REG_R5) 7392 insn16 = N16_TYPE38 (BEQS38, N32_RA5 (insn), N32_IMM14S (insn)); 7393 insn_type = NDS32_INSN_BEQS38; 7394 break; 7395 } 7396 else 7397 { 7398 /* N32_BR1_BNE */ 7399 if (N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_R5 7400 && N32_RT5 (insn) != REG_R5) 7401 insn16 = N16_TYPE38 (BNES38, N32_RT5 (insn), N32_IMM14S (insn)); 7402 else if (N32_IS_RA3 (insn) && N32_RT5 (insn) == REG_R5 7403 && N32_RA5 (insn) != REG_R5) 7404 insn16 = N16_TYPE38 (BNES38, N32_RA5 (insn), N32_IMM14S (insn)); 7405 insn_type = NDS32_INSN_BNES38; 7406 break; 7407 } 7408 break; 7409 7410 case N32_OP6_BR2: 7411 switch (N32_BR2_SUB (insn)) 7412 { 7413 case N32_BR2_BEQZ: 7414 if (N32_IS_RT3 (insn) && IS_WITHIN_S (N32_IMM16S (insn), 8)) 7415 { 7416 insn16 = N16_TYPE38 (BEQZ38, N32_RT5 (insn), N32_IMM16S (insn)); 7417 insn_type = NDS32_INSN_BEQZ38; 7418 } 7419 else if (N32_RT5 (insn) == REG_R15 7420 && IS_WITHIN_S (N32_IMM16S (insn), 8)) 7421 { 7422 insn16 = N16_TYPE8 (BEQZS8, N32_IMM16S (insn)); 7423 insn_type = NDS32_INSN_BEQZS8; 7424 } 7425 break; 7426 7427 case N32_BR2_BNEZ: 7428 if (N32_IS_RT3 (insn) && IS_WITHIN_S (N32_IMM16S (insn), 8)) 7429 { 7430 insn16 = N16_TYPE38 (BNEZ38, N32_RT5 (insn), N32_IMM16S (insn)); 7431 insn_type = NDS32_INSN_BNEZ38; 7432 } 7433 else if (N32_RT5 (insn) == REG_R15 7434 && IS_WITHIN_S (N32_IMM16S (insn), 8)) 7435 { 7436 insn16 = N16_TYPE8 (BNEZS8, N32_IMM16S (insn)); 7437 insn_type = NDS32_INSN_BNEZS8; 7438 } 7439 break; 7440 7441 case N32_BR2_IFCALL: 7442 if (IS_WITHIN_U (N32_IMM16S (insn), 9)) 7443 { 7444 insn16 = N16_TYPE9 (IFCALL9, N32_IMM16S (insn)); 7445 insn_type = NDS32_INSN_IFCALL9; 7446 } 7447 break; 7448 } 7449 break; 7450 7451 case N32_OP6_JI: 7452 if ((insn & __BIT (24)) == 0) 7453 { 7454 /* N32_JI_J */ 7455 if (IS_WITHIN_S (N32_IMM24S (insn), 8)) 7456 { 7457 insn16 = N16_TYPE8 (J8, N32_IMM24S (insn)); 7458 insn_type = NDS32_INSN_J8; 7459 } 7460 } 7461 break; 7462 7463 case N32_OP6_JREG: 7464 if (__GF (insn, 8, 2) != 0) 7465 goto done; 7466 7467 switch (N32_IMMU (insn, 5)) 7468 { 7469 case N32_JREG_JR: 7470 if (N32_JREG_HINT (insn) == 0) 7471 { 7472 /* jr */ 7473 insn16 = N16_TYPE5 (JR5, N32_RB5 (insn)); 7474 insn_type = NDS32_INSN_JR5; 7475 } 7476 else if (N32_JREG_HINT (insn) == 1) 7477 { 7478 /* ret */ 7479 insn16 = N16_TYPE5 (RET5, N32_RB5 (insn)); 7480 insn_type = NDS32_INSN_RET5; 7481 } 7482 else if (N32_JREG_HINT (insn) == 3) 7483 { 7484 /* ifret = mov55 $sp, $sp */ 7485 insn16 = N16_TYPE55 (MOV55, REG_SP, REG_SP); 7486 insn_type = NDS32_INSN_IFRET; 7487 } 7488 break; 7489 7490 case N32_JREG_JRAL: 7491 /* It's convertible when return rt5 is $lp and address 7492 translation is kept. */ 7493 if (N32_RT5 (insn) == REG_LP && N32_JREG_HINT (insn) == 0) 7494 { 7495 insn16 = N16_TYPE5 (JRAL5, N32_RB5 (insn)); 7496 insn_type = NDS32_INSN_JRAL5; 7497 } 7498 break; 7499 } 7500 break; 7501 7502 case N32_OP6_MISC: 7503 if (N32_SUB5 (insn) == N32_MISC_BREAK && N32_SWID (insn) < 32) 7504 { 7505 /* For v3, swid above 31 are used for ex9.it. */ 7506 insn16 = N16_TYPE5 (BREAK16, N32_SWID (insn)); 7507 insn_type = NDS32_INSN_BREAK16; 7508 } 7509 break; 7510 7511 default: 7512 /* This instruction has no 16-bit variant. */ 7513 goto done; 7514 } 7515 7516done: 7517 /* Bit-15 of insn16 should be set for a valid instruction. */ 7518 if ((insn16 & 0x8000) == 0) 7519 return 0; 7520 7521 if (pinsn16) 7522 *pinsn16 = insn16; 7523 if (pinsn_type) 7524 *pinsn_type = insn_type; 7525 return 1; 7526} 7527 7528static int 7529special_convert_32_to_16 (unsigned long insn, uint16_t *pinsn16, 7530 Elf_Internal_Rela *reloc) 7531{ 7532 uint16_t insn16 = 0; 7533 7534 if ((reloc->r_addend & R_NDS32_INSN16_FP7U2_FLAG) == 0 7535 || (ELF32_R_TYPE (reloc->r_info) != R_NDS32_INSN16)) 7536 return 0; 7537 7538 if (!N32_IS_RT3 (insn)) 7539 return 0; 7540 7541 switch (N32_OP6 (insn)) 7542 { 7543 case N32_OP6_LWI: 7544 if (N32_RA5 (insn) == REG_GP && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7545 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 0, N32_IMM15S (insn)); 7546 break; 7547 case N32_OP6_SWI: 7548 if (N32_RA5 (insn) == REG_GP && IS_WITHIN_U (N32_IMM15S (insn), 7)) 7549 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 1, N32_IMM15S (insn)); 7550 break; 7551 case N32_OP6_HWGP: 7552 if (!IS_WITHIN_U (N32_IMM17S (insn), 7)) 7553 break; 7554 7555 if (__GF (insn, 17, 3) == 6) 7556 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 0, N32_IMM17S (insn)); 7557 else if (__GF (insn, 17, 3) == 7) 7558 insn16 = N16_TYPE37 (XWI37, N32_RT5 (insn), 1, N32_IMM17S (insn)); 7559 break; 7560 } 7561 7562 if ((insn16 & 0x8000) == 0) 7563 return 0; 7564 7565 *pinsn16 = insn16; 7566 return 1; 7567} 7568 7569/* Convert a 16-bit instruction to 32-bit one. 7570 INSN16 it the input and PINSN it the point to output. 7571 Return non-zero on successful. Otherwise 0 is returned. */ 7572 7573int 7574nds32_convert_16_to_32 (bfd *abfd, uint16_t insn16, uint32_t *pinsn) 7575{ 7576 uint32_t insn = 0xffffffff; 7577 unsigned long mach = bfd_get_mach (abfd); 7578 7579 /* NOTE: push25, pop25 and movd44 do not have 32-bit variants. */ 7580 7581 switch (__GF (insn16, 9, 6)) 7582 { 7583 case 0x4: /* add45 */ 7584 insn = N32_ALU1 (ADD, N16_RT4 (insn16), N16_RT4 (insn16), 7585 N16_RA5 (insn16)); 7586 goto done; 7587 case 0x5: /* sub45 */ 7588 insn = N32_ALU1 (SUB, N16_RT4 (insn16), N16_RT4 (insn16), 7589 N16_RA5 (insn16)); 7590 goto done; 7591 case 0x6: /* addi45 */ 7592 insn = N32_TYPE2 (ADDI, N16_RT4 (insn16), N16_RT4 (insn16), 7593 N16_IMM5U (insn16)); 7594 goto done; 7595 case 0x7: /* subi45 */ 7596 insn = N32_TYPE2 (ADDI, N16_RT4 (insn16), N16_RT4 (insn16), 7597 -N16_IMM5U (insn16)); 7598 goto done; 7599 case 0x8: /* srai45 */ 7600 insn = N32_ALU1 (SRAI, N16_RT4 (insn16), N16_RT4 (insn16), 7601 N16_IMM5U (insn16)); 7602 goto done; 7603 case 0x9: /* srli45 */ 7604 insn = N32_ALU1 (SRLI, N16_RT4 (insn16), N16_RT4 (insn16), 7605 N16_IMM5U (insn16)); 7606 goto done; 7607 case 0xa: /* slli333 */ 7608 insn = N32_ALU1 (SLLI, N16_RT3 (insn16), N16_RA3 (insn16), 7609 N16_IMM3U (insn16)); 7610 goto done; 7611 case 0xc: /* add333 */ 7612 insn = N32_ALU1 (ADD, N16_RT3 (insn16), N16_RA3 (insn16), 7613 N16_RB3 (insn16)); 7614 goto done; 7615 case 0xd: /* sub333 */ 7616 insn = N32_ALU1 (SUB, N16_RT3 (insn16), N16_RA3 (insn16), 7617 N16_RB3 (insn16)); 7618 goto done; 7619 case 0xe: /* addi333 */ 7620 insn = N32_TYPE2 (ADDI, N16_RT3 (insn16), N16_RA3 (insn16), 7621 N16_IMM3U (insn16)); 7622 goto done; 7623 case 0xf: /* subi333 */ 7624 insn = N32_TYPE2 (ADDI, N16_RT3 (insn16), N16_RA3 (insn16), 7625 -N16_IMM3U (insn16)); 7626 goto done; 7627 case 0x10: /* lwi333 */ 7628 insn = N32_TYPE2 (LWI, N16_RT3 (insn16), N16_RA3 (insn16), 7629 N16_IMM3U (insn16)); 7630 goto done; 7631 case 0x12: /* lhi333 */ 7632 insn = N32_TYPE2 (LHI, N16_RT3 (insn16), N16_RA3 (insn16), 7633 N16_IMM3U (insn16)); 7634 goto done; 7635 case 0x13: /* lbi333 */ 7636 insn = N32_TYPE2 (LBI, N16_RT3 (insn16), N16_RA3 (insn16), 7637 N16_IMM3U (insn16)); 7638 goto done; 7639 case 0x11: /* lwi333.bi */ 7640 insn = N32_TYPE2 (LWI_BI, N16_RT3 (insn16), N16_RA3 (insn16), 7641 N16_IMM3U (insn16)); 7642 goto done; 7643 case 0x14: /* swi333 */ 7644 insn = N32_TYPE2 (SWI, N16_RT3 (insn16), N16_RA3 (insn16), 7645 N16_IMM3U (insn16)); 7646 goto done; 7647 case 0x16: /* shi333 */ 7648 insn = N32_TYPE2 (SHI, N16_RT3 (insn16), N16_RA3 (insn16), 7649 N16_IMM3U (insn16)); 7650 goto done; 7651 case 0x17: /* sbi333 */ 7652 insn = N32_TYPE2 (SBI, N16_RT3 (insn16), N16_RA3 (insn16), 7653 N16_IMM3U (insn16)); 7654 goto done; 7655 case 0x15: /* swi333.bi */ 7656 insn = N32_TYPE2 (SWI_BI, N16_RT3 (insn16), N16_RA3 (insn16), 7657 N16_IMM3U (insn16)); 7658 goto done; 7659 case 0x18: /* addri36.sp */ 7660 insn = N32_TYPE2 (ADDI, N16_RT3 (insn16), REG_SP, 7661 N16_IMM6U (insn16) << 2); 7662 goto done; 7663 case 0x19: /* lwi45.fe */ 7664 insn = N32_TYPE2 (LWI, N16_RT4 (insn16), REG_R8, 7665 (N16_IMM5U (insn16) - 32)); 7666 goto done; 7667 case 0x1a: /* lwi450 */ 7668 insn = N32_TYPE2 (LWI, N16_RT4 (insn16), N16_RA5 (insn16), 0); 7669 goto done; 7670 case 0x1b: /* swi450 */ 7671 insn = N32_TYPE2 (SWI, N16_RT4 (insn16), N16_RA5 (insn16), 0); 7672 goto done; 7673 7674 /* These are r15 implied instructions. */ 7675 case 0x30: /* slts45 */ 7676 insn = N32_ALU1 (SLTS, REG_TA, N16_RT4 (insn16), N16_RA5 (insn16)); 7677 goto done; 7678 case 0x31: /* slt45 */ 7679 insn = N32_ALU1 (SLT, REG_TA, N16_RT4 (insn16), N16_RA5 (insn16)); 7680 goto done; 7681 case 0x32: /* sltsi45 */ 7682 insn = N32_TYPE2 (SLTSI, REG_TA, N16_RT4 (insn16), N16_IMM5U (insn16)); 7683 goto done; 7684 case 0x33: /* slti45 */ 7685 insn = N32_TYPE2 (SLTI, REG_TA, N16_RT4 (insn16), N16_IMM5U (insn16)); 7686 goto done; 7687 case 0x34: /* beqzs8, bnezs8 */ 7688 if (insn16 & __BIT (8)) 7689 insn = N32_BR2 (BNEZ, REG_TA, N16_IMM8S (insn16)); 7690 else 7691 insn = N32_BR2 (BEQZ, REG_TA, N16_IMM8S (insn16)); 7692 goto done; 7693 7694 case 0x35: /* break16, ex9.it */ 7695 /* Only consider range of v3 break16. */ 7696 insn = N32_TYPE0 (MISC, (N16_IMM5U (insn16) << 5) | N32_MISC_BREAK); 7697 goto done; 7698 7699 case 0x3c: /* ifcall9 */ 7700 insn = N32_BR2 (IFCALL, 0, N16_IMM9U (insn16)); 7701 goto done; 7702 case 0x3d: /* movpi45 */ 7703 insn = N32_TYPE1 (MOVI, N16_RT4 (insn16), N16_IMM5U (insn16) + 16); 7704 goto done; 7705 7706 case 0x3f: /* MISC33 */ 7707 switch (insn16 & 0x7) 7708 { 7709 case 2: /* neg33 */ 7710 insn = N32_TYPE2 (SUBRI, N16_RT3 (insn16), N16_RA3 (insn16), 0); 7711 break; 7712 case 3: /* not33 */ 7713 insn = N32_ALU1 (NOR, N16_RT3 (insn16), N16_RA3 (insn16), 7714 N16_RA3 (insn16)); 7715 break; 7716 case 4: /* mul33 */ 7717 insn = N32_ALU2 (MUL, N16_RT3 (insn16), N16_RT3 (insn16), 7718 N16_RA3 (insn16)); 7719 break; 7720 case 5: /* xor33 */ 7721 insn = N32_ALU1 (XOR, N16_RT3 (insn16), N16_RT3 (insn16), 7722 N16_RA3 (insn16)); 7723 break; 7724 case 6: /* and33 */ 7725 insn = N32_ALU1 (AND, N16_RT3 (insn16), N16_RT3 (insn16), 7726 N16_RA3 (insn16)); 7727 break; 7728 case 7: /* or33 */ 7729 insn = N32_ALU1 (OR, N16_RT3 (insn16), N16_RT3 (insn16), 7730 N16_RA3 (insn16)); 7731 break; 7732 } 7733 goto done; 7734 7735 case 0xb: 7736 switch (insn16 & 0x7) 7737 { 7738 case 0: /* zeb33 */ 7739 insn = N32_TYPE2 (ANDI, N16_RT3 (insn16), N16_RA3 (insn16), 0xff); 7740 break; 7741 case 1: /* zeh33 */ 7742 insn = N32_ALU1 (ZEH, N16_RT3 (insn16), N16_RA3 (insn16), 0); 7743 break; 7744 case 2: /* seb33 */ 7745 insn = N32_ALU1 (SEB, N16_RT3 (insn16), N16_RA3 (insn16), 0); 7746 break; 7747 case 3: /* seh33 */ 7748 insn = N32_ALU1 (SEH, N16_RT3 (insn16), N16_RA3 (insn16), 0); 7749 break; 7750 case 4: /* xlsb33 */ 7751 insn = N32_TYPE2 (ANDI, N16_RT3 (insn16), N16_RA3 (insn16), 1); 7752 break; 7753 case 5: /* x11b33 */ 7754 insn = N32_TYPE2 (ANDI, N16_RT3 (insn16), N16_RA3 (insn16), 0x7ff); 7755 break; 7756 case 6: /* bmski33 */ 7757 insn = N32_TYPE2 (ANDI, N16_RT3 (insn16), N16_RT3 (insn16), 7758 1 << __GF (insn16, 3, 3)); 7759 break; 7760 case 7: /* fexti33 */ 7761 insn = N32_TYPE2 (ANDI, N16_RT3 (insn16), N16_RT3 (insn16), 7762 (1 << (__GF (insn16, 3, 3) + 1)) - 1); 7763 break; 7764 } 7765 goto done; 7766 } 7767 7768 switch (__GF (insn16, 10, 5)) 7769 { 7770 case 0x0: /* mov55 or ifret16 */ 7771 if (mach >= MACH_V3 && N16_RT5 (insn16) == REG_SP 7772 && N16_RT5 (insn16) == N16_RA5 (insn16)) 7773 insn = N32_JREG (JR, 0, 0, 0, 3); 7774 else 7775 insn = N32_TYPE2 (ADDI, N16_RT5 (insn16), N16_RA5 (insn16), 0); 7776 goto done; 7777 case 0x1: /* movi55 */ 7778 insn = N32_TYPE1 (MOVI, N16_RT5 (insn16), N16_IMM5S (insn16)); 7779 goto done; 7780 case 0x1b: /* addi10s (V2) */ 7781 insn = N32_TYPE2 (ADDI, REG_SP, REG_SP, N16_IMM10S (insn16)); 7782 goto done; 7783 } 7784 7785 switch (__GF (insn16, 11, 4)) 7786 { 7787 case 0x7: /* lwi37.fp/swi37.fp */ 7788 if (insn16 & __BIT (7)) /* swi37.fp */ 7789 insn = N32_TYPE2 (SWI, N16_RT38 (insn16), REG_FP, N16_IMM7U (insn16)); 7790 else /* lwi37.fp */ 7791 insn = N32_TYPE2 (LWI, N16_RT38 (insn16), REG_FP, N16_IMM7U (insn16)); 7792 goto done; 7793 case 0x8: /* beqz38 */ 7794 insn = N32_BR2 (BEQZ, N16_RT38 (insn16), N16_IMM8S (insn16)); 7795 goto done; 7796 case 0x9: /* bnez38 */ 7797 insn = N32_BR2 (BNEZ, N16_RT38 (insn16), N16_IMM8S (insn16)); 7798 goto done; 7799 case 0xa: /* beqs38/j8, implied r5 */ 7800 if (N16_RT38 (insn16) == 5) 7801 insn = N32_JI (J, N16_IMM8S (insn16)); 7802 else 7803 insn = N32_BR1 (BEQ, N16_RT38 (insn16), REG_R5, N16_IMM8S (insn16)); 7804 goto done; 7805 case 0xb: /* bnes38 and others */ 7806 if (N16_RT38 (insn16) == 5) 7807 { 7808 switch (__GF (insn16, 5, 3)) 7809 { 7810 case 0: /* jr5 */ 7811 insn = N32_JREG (JR, 0, N16_RA5 (insn16), 0, 0); 7812 break; 7813 case 4: /* ret5 */ 7814 insn = N32_JREG (JR, 0, N16_RA5 (insn16), 0, 1); 7815 break; 7816 case 1: /* jral5 */ 7817 insn = N32_JREG (JRAL, REG_LP, N16_RA5 (insn16), 0, 0); 7818 break; 7819 case 2: /* ex9.it imm5 */ 7820 /* ex9.it had no 32-bit variantl. */ 7821 break; 7822 case 5: /* add5.pc */ 7823 /* add5.pc had no 32-bit variantl. */ 7824 break; 7825 } 7826 } 7827 else /* bnes38 */ 7828 insn = N32_BR1 (BNE, N16_RT38 (insn16), REG_R5, N16_IMM8S (insn16)); 7829 goto done; 7830 case 0xe: /* lwi37/swi37 */ 7831 if (insn16 & (1 << 7)) /* swi37.sp */ 7832 insn = N32_TYPE2 (SWI, N16_RT38 (insn16), REG_SP, N16_IMM7U (insn16)); 7833 else /* lwi37.sp */ 7834 insn = N32_TYPE2 (LWI, N16_RT38 (insn16), REG_SP, N16_IMM7U (insn16)); 7835 goto done; 7836 } 7837 7838done: 7839 if (insn & 0x80000000) 7840 return 0; 7841 7842 if (pinsn) 7843 *pinsn = insn; 7844 return 1; 7845} 7846 7847static bfd_boolean 7848is_sda_access_insn (unsigned long insn) 7849{ 7850 switch (N32_OP6 (insn)) 7851 { 7852 case N32_OP6_LWI: 7853 case N32_OP6_LHI: 7854 case N32_OP6_LHSI: 7855 case N32_OP6_LBI: 7856 case N32_OP6_LBSI: 7857 case N32_OP6_SWI: 7858 case N32_OP6_SHI: 7859 case N32_OP6_SBI: 7860 case N32_OP6_LWC: 7861 case N32_OP6_LDC: 7862 case N32_OP6_SWC: 7863 case N32_OP6_SDC: 7864 return TRUE; 7865 default: 7866 ; 7867 } 7868 return FALSE; 7869} 7870 7871static unsigned long 7872turn_insn_to_sda_access (uint32_t insn, bfd_signed_vma type, uint32_t *pinsn) 7873{ 7874 uint32_t oinsn = 0; 7875 7876 switch (type) 7877 { 7878 case R_NDS32_GOT_LO12: 7879 case R_NDS32_GOTOFF_LO12: 7880 case R_NDS32_PLTREL_LO12: 7881 case R_NDS32_PLT_GOTREL_LO12: 7882 case R_NDS32_LO12S0_RELA: 7883 switch (N32_OP6 (insn)) 7884 { 7885 case N32_OP6_LBI: 7886 /* lbi.gp */ 7887 oinsn = N32_TYPE1 (LBGP, N32_RT5 (insn), 0); 7888 break; 7889 case N32_OP6_LBSI: 7890 /* lbsi.gp */ 7891 oinsn = N32_TYPE1 (LBGP, N32_RT5 (insn), __BIT (19)); 7892 break; 7893 case N32_OP6_SBI: 7894 /* sbi.gp */ 7895 oinsn = N32_TYPE1 (SBGP, N32_RT5 (insn), 0); 7896 break; 7897 case N32_OP6_ORI: 7898 /* addi.gp */ 7899 oinsn = N32_TYPE1 (SBGP, N32_RT5 (insn), __BIT (19)); 7900 break; 7901 } 7902 break; 7903 7904 case R_NDS32_LO12S1_RELA: 7905 switch (N32_OP6 (insn)) 7906 { 7907 case N32_OP6_LHI: 7908 /* lhi.gp */ 7909 oinsn = N32_TYPE1 (HWGP, N32_RT5 (insn), 0); 7910 break; 7911 case N32_OP6_LHSI: 7912 /* lhsi.gp */ 7913 oinsn = N32_TYPE1 (HWGP, N32_RT5 (insn), __BIT (18)); 7914 break; 7915 case N32_OP6_SHI: 7916 /* shi.gp */ 7917 oinsn = N32_TYPE1 (HWGP, N32_RT5 (insn), __BIT (19)); 7918 break; 7919 } 7920 break; 7921 7922 case R_NDS32_LO12S2_RELA: 7923 switch (N32_OP6 (insn)) 7924 { 7925 case N32_OP6_LWI: 7926 /* lwi.gp */ 7927 oinsn = N32_TYPE1 (HWGP, N32_RT5 (insn), __MF (6, 17, 3)); 7928 break; 7929 case N32_OP6_SWI: 7930 /* swi.gp */ 7931 oinsn = N32_TYPE1 (HWGP, N32_RT5 (insn), __MF (7, 17, 3)); 7932 break; 7933 } 7934 break; 7935 7936 case R_NDS32_LO12S2_DP_RELA: 7937 case R_NDS32_LO12S2_SP_RELA: 7938 oinsn = (insn & 0x7ff07000) | (REG_GP << 15); 7939 break; 7940 } 7941 7942 if (oinsn) 7943 *pinsn = oinsn; 7944 7945 return oinsn != 0; 7946} 7947 7948/* Linker hasn't found the correct merge section for non-section symbol 7949 in relax time, this work is left to the function elf_link_input_bfd(). 7950 So for non-section symbol, _bfd_merged_section_offset is also needed 7951 to find the correct symbol address. */ 7952 7953static bfd_vma 7954nds32_elf_rela_local_sym (bfd *abfd, Elf_Internal_Sym *sym, 7955 asection **psec, Elf_Internal_Rela *rel) 7956{ 7957 asection *sec = *psec; 7958 bfd_vma relocation; 7959 7960 relocation = (sec->output_section->vma 7961 + sec->output_offset + sym->st_value); 7962 if ((sec->flags & SEC_MERGE) && sec->sec_info_type == SEC_INFO_TYPE_MERGE) 7963 { 7964 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 7965 rel->r_addend = 7966 _bfd_merged_section_offset (abfd, psec, 7967 elf_section_data (sec)->sec_info, 7968 sym->st_value + rel->r_addend); 7969 else 7970 rel->r_addend = 7971 _bfd_merged_section_offset (abfd, psec, 7972 elf_section_data (sec)->sec_info, 7973 sym->st_value) + rel->r_addend; 7974 7975 if (sec != *psec) 7976 { 7977 /* If we have changed the section, and our original section is 7978 marked with SEC_EXCLUDE, it means that the original 7979 SEC_MERGE section has been completely subsumed in some 7980 other SEC_MERGE section. In this case, we need to leave 7981 some info around for --emit-relocs. */ 7982 if ((sec->flags & SEC_EXCLUDE) != 0) 7983 sec->kept_section = *psec; 7984 sec = *psec; 7985 } 7986 rel->r_addend -= relocation; 7987 rel->r_addend += sec->output_section->vma + sec->output_offset; 7988 } 7989 return relocation; 7990} 7991 7992static bfd_vma 7993calculate_memory_address (bfd *abfd, Elf_Internal_Rela *irel, 7994 Elf_Internal_Sym *isymbuf, 7995 Elf_Internal_Shdr *symtab_hdr) 7996{ 7997 bfd_signed_vma foff; 7998 bfd_vma symval, addend; 7999 Elf_Internal_Rela irel_fn; 8000 Elf_Internal_Sym *isym; 8001 asection *sym_sec; 8002 8003 /* Get the value of the symbol referred to by the reloc. */ 8004 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 8005 { 8006 /* A local symbol. */ 8007 isym = isymbuf + ELF32_R_SYM (irel->r_info); 8008 8009 if (isym->st_shndx == SHN_UNDEF) 8010 sym_sec = bfd_und_section_ptr; 8011 else if (isym->st_shndx == SHN_ABS) 8012 sym_sec = bfd_abs_section_ptr; 8013 else if (isym->st_shndx == SHN_COMMON) 8014 sym_sec = bfd_com_section_ptr; 8015 else 8016 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 8017 memcpy (&irel_fn, irel, sizeof (Elf_Internal_Rela)); 8018 symval = nds32_elf_rela_local_sym (abfd, isym, &sym_sec, &irel_fn); 8019 addend = irel_fn.r_addend; 8020 } 8021 else 8022 { 8023 unsigned long indx; 8024 struct elf_link_hash_entry *h; 8025 8026 /* An external symbol. */ 8027 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 8028 h = elf_sym_hashes (abfd)[indx]; 8029 BFD_ASSERT (h != NULL); 8030 8031 while (h->root.type == bfd_link_hash_indirect 8032 || h->root.type == bfd_link_hash_warning) 8033 h = (struct elf_link_hash_entry *) h->root.u.i.link; 8034 8035 if (h->root.type != bfd_link_hash_defined 8036 && h->root.type != bfd_link_hash_defweak) 8037 /* This appears to be a reference to an undefined 8038 symbol. Just ignore it--it will be caught by the 8039 regular reloc processing. */ 8040 return 0; 8041 8042 if (h->root.u.def.section->flags & SEC_MERGE) 8043 { 8044 sym_sec = h->root.u.def.section; 8045 symval = _bfd_merged_section_offset (abfd, &sym_sec, elf_section_data 8046 (sym_sec)->sec_info, h->root.u.def.value); 8047 symval = symval + sym_sec->output_section->vma 8048 + sym_sec->output_offset; 8049 } 8050 else 8051 symval = (h->root.u.def.value 8052 + h->root.u.def.section->output_section->vma 8053 + h->root.u.def.section->output_offset); 8054 addend = irel->r_addend; 8055 } 8056 8057 foff = symval + addend; 8058 8059 return foff; 8060} 8061 8062static bfd_vma 8063calculate_got_memory_address (bfd *abfd, struct bfd_link_info *link_info, 8064 Elf_Internal_Rela *irel, 8065 Elf_Internal_Shdr *symtab_hdr) 8066{ 8067 int symndx; 8068 bfd_vma *local_got_offsets; 8069 /* Get the value of the symbol referred to by the reloc. */ 8070 struct elf_link_hash_entry *h; 8071 struct elf_nds32_link_hash_table *htab = nds32_elf_hash_table (link_info); 8072 8073 /* An external symbol. */ 8074 symndx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 8075 h = elf_sym_hashes (abfd)[symndx]; 8076 while (h->root.type == bfd_link_hash_indirect 8077 || h->root.type == bfd_link_hash_warning) 8078 h = (struct elf_link_hash_entry *) h->root.u.i.link; 8079 8080 if (symndx >= 0) 8081 { 8082 BFD_ASSERT (h != NULL); 8083 return htab->sgot->output_section->vma + htab->sgot->output_offset 8084 + h->got.offset; 8085 } 8086 else 8087 { 8088 local_got_offsets = elf_local_got_offsets (abfd); 8089 BFD_ASSERT (local_got_offsets != NULL); 8090 return htab->sgot->output_section->vma + htab->sgot->output_offset 8091 + local_got_offsets[ELF32_R_SYM (irel->r_info)]; 8092 } 8093 8094 /* The _GLOBAL_OFFSET_TABLE_ may be undefweak(or should be?). */ 8095 /* The check of h->root.type is passed. */ 8096} 8097 8098static int 8099is_16bit_NOP (bfd *abfd ATTRIBUTE_UNUSED, 8100 asection *sec, Elf_Internal_Rela *rel) 8101{ 8102 bfd_byte *contents; 8103 unsigned short insn16; 8104 8105 if (!(rel->r_addend & R_NDS32_INSN16_CONVERT_FLAG)) 8106 return FALSE; 8107 contents = elf_section_data (sec)->this_hdr.contents; 8108 insn16 = bfd_getb16 (contents + rel->r_offset); 8109 if (insn16 == NDS32_NOP16) 8110 return TRUE; 8111 return FALSE; 8112} 8113 8114/* It checks whether the instruction could be converted to 8115 16-bit form and returns the converted one. 8116 8117 `internal_relocs' is supposed to be sorted. */ 8118 8119static int 8120is_convert_32_to_16 (bfd *abfd, asection *sec, 8121 Elf_Internal_Rela *reloc, 8122 Elf_Internal_Rela *internal_relocs, 8123 Elf_Internal_Rela *irelend, 8124 uint16_t *insn16) 8125{ 8126#define NORMAL_32_TO_16 (1 << 0) 8127#define SPECIAL_32_TO_16 (1 << 1) 8128 bfd_byte *contents = NULL; 8129 bfd_signed_vma off; 8130 bfd_vma mem_addr; 8131 uint32_t insn = 0; 8132 Elf_Internal_Rela *pc_rel; 8133 int pic_ext_target = 0; 8134 Elf_Internal_Shdr *symtab_hdr; 8135 Elf_Internal_Sym *isymbuf = NULL; 8136 int convert_type; 8137 bfd_vma offset; 8138 8139 if (reloc->r_offset + 4 > sec->size) 8140 return FALSE; 8141 8142 offset = reloc->r_offset; 8143 8144 if (!nds32_get_section_contents (abfd, sec, &contents)) 8145 return FALSE; 8146 insn = bfd_getb32 (contents + offset); 8147 8148 if (nds32_convert_32_to_16 (abfd, insn, insn16, NULL)) 8149 convert_type = NORMAL_32_TO_16; 8150 else if (special_convert_32_to_16 (insn, insn16, reloc)) 8151 convert_type = SPECIAL_32_TO_16; 8152 else 8153 return FALSE; 8154 8155 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 8156 if (!nds32_get_local_syms (abfd, sec, &isymbuf)) 8157 return FALSE; 8158 8159 /* Find the first relocation of the same relocation-type, 8160 so we iteratie them forward. */ 8161 pc_rel = reloc; 8162 while ((pc_rel - 1) >= internal_relocs && pc_rel[-1].r_offset == offset) 8163 pc_rel--; 8164 8165 for (; pc_rel < irelend && pc_rel->r_offset == offset; pc_rel++) 8166 { 8167 if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_15_PCREL_RELA 8168 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_17_PCREL_RELA 8169 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_25_PCREL_RELA 8170 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_25_PLTREL) 8171 { 8172 off = calculate_offset (abfd, sec, pc_rel, isymbuf, symtab_hdr, 8173 &pic_ext_target); 8174 if (off >= ACCURATE_8BIT_S1 || off < -ACCURATE_8BIT_S1 8175 || off == 0) 8176 return FALSE; 8177 break; 8178 } 8179 else if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_20_RELA) 8180 { 8181 /* movi => movi55 */ 8182 mem_addr = calculate_memory_address (abfd, pc_rel, isymbuf, 8183 symtab_hdr); 8184 /* mem_addr is unsigned, but the value should 8185 be between [-16, 15]. */ 8186 if ((mem_addr + 0x10) >> 5) 8187 return FALSE; 8188 break; 8189 } 8190 else if ((ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_TLS_LE_20) 8191 || (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_TLS_LE_LO12)) 8192 { 8193 /* It never happen movi to movi55 for R_NDS32_TLS_LE_20, 8194 because it can be relaxed to addi for TLS_LE_ADD. */ 8195 return FALSE; 8196 } 8197 else if ((ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_SDA15S2_RELA 8198 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_SDA17S2_RELA) 8199 && (reloc->r_addend & R_NDS32_INSN16_FP7U2_FLAG) 8200 && convert_type == SPECIAL_32_TO_16) 8201 { 8202 /* fp-as-gp 8203 We've selected a best fp-base for this access, so we can 8204 always resolve it anyway. Do nothing. */ 8205 break; 8206 } 8207 else if ((ELF32_R_TYPE (pc_rel->r_info) > R_NDS32_NONE 8208 && (ELF32_R_TYPE (pc_rel->r_info) < R_NDS32_RELA_GNU_VTINHERIT)) 8209 || ((ELF32_R_TYPE (pc_rel->r_info) > R_NDS32_RELA_GNU_VTENTRY) 8210 && (ELF32_R_TYPE (pc_rel->r_info) < R_NDS32_INSN16)) 8211 || ((ELF32_R_TYPE (pc_rel->r_info) > R_NDS32_LOADSTORE) 8212 && (ELF32_R_TYPE (pc_rel->r_info) < R_NDS32_DWARF2_OP1_RELA))) 8213 { 8214 /* Prevent unresolved addi instruction translate 8215 to addi45 or addi333. */ 8216 return FALSE; 8217 } 8218 else if ((ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_17IFC_PCREL_RELA)) 8219 { 8220 off = calculate_offset (abfd, sec, pc_rel, isymbuf, symtab_hdr, 8221 &pic_ext_target); 8222 if (off >= ACCURATE_U9BIT_S1 || off <= 0) 8223 return FALSE; 8224 break; 8225 } 8226 } 8227 8228 return TRUE; 8229} 8230 8231static void 8232nds32_elf_write_16 (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *contents, 8233 Elf_Internal_Rela *reloc, 8234 Elf_Internal_Rela *internal_relocs, 8235 Elf_Internal_Rela *irelend, 8236 unsigned short insn16) 8237{ 8238 Elf_Internal_Rela *pc_rel; 8239 bfd_vma offset; 8240 8241 offset = reloc->r_offset; 8242 bfd_putb16 (insn16, contents + offset); 8243 /* Find the first relocation of the same relocation-type, 8244 so we iteratie them forward. */ 8245 pc_rel = reloc; 8246 while ((pc_rel - 1) > internal_relocs && pc_rel[-1].r_offset == offset) 8247 pc_rel--; 8248 8249 for (; pc_rel < irelend && pc_rel->r_offset == offset; pc_rel++) 8250 { 8251 if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_15_PCREL_RELA 8252 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_17_PCREL_RELA 8253 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_25_PCREL_RELA) 8254 { 8255 pc_rel->r_info = 8256 ELF32_R_INFO (ELF32_R_SYM (pc_rel->r_info), R_NDS32_9_PCREL_RELA); 8257 } 8258 else if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_25_PLTREL) 8259 pc_rel->r_info = 8260 ELF32_R_INFO (ELF32_R_SYM (pc_rel->r_info), R_NDS32_9_PLTREL); 8261 else if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_20_RELA) 8262 pc_rel->r_info = 8263 ELF32_R_INFO (ELF32_R_SYM (pc_rel->r_info), R_NDS32_5_RELA); 8264 else if (ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_SDA15S2_RELA 8265 || ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_SDA17S2_RELA) 8266 pc_rel->r_info = 8267 ELF32_R_INFO (ELF32_R_SYM (pc_rel->r_info), R_NDS32_SDA_FP7U2_RELA); 8268 else if ((ELF32_R_TYPE (pc_rel->r_info) == R_NDS32_17IFC_PCREL_RELA)) 8269 pc_rel->r_info = 8270 ELF32_R_INFO (ELF32_R_SYM (pc_rel->r_info), R_NDS32_10IFCU_PCREL_RELA); 8271 } 8272} 8273 8274/* Find a relocation of type specified by `reloc_type' 8275 of the same r_offset with reloc. 8276 If not found, return irelend. 8277 8278 Assuming relocations are sorted by r_offset, 8279 we find the relocation from `reloc' backward untill relocs, 8280 or find it from `reloc' forward untill irelend. */ 8281 8282static Elf_Internal_Rela * 8283find_relocs_at_address (Elf_Internal_Rela *reloc, 8284 Elf_Internal_Rela *relocs, 8285 Elf_Internal_Rela *irelend, 8286 enum elf_nds32_reloc_type reloc_type) 8287{ 8288 Elf_Internal_Rela *rel_t; 8289 8290 /* Find backward. */ 8291 for (rel_t = reloc; 8292 rel_t >= relocs && rel_t->r_offset == reloc->r_offset; 8293 rel_t--) 8294 if (ELF32_R_TYPE (rel_t->r_info) == reloc_type) 8295 return rel_t; 8296 8297 /* We didn't find it backward. Try find it forward. */ 8298 for (rel_t = reloc; 8299 rel_t < irelend && rel_t->r_offset == reloc->r_offset; 8300 rel_t++) 8301 if (ELF32_R_TYPE (rel_t->r_info) == reloc_type) 8302 return rel_t; 8303 8304 return irelend; 8305} 8306 8307/* Find a relocation of specified type and offset. 8308 `reloc' is just a refence point to find a relocation at specified offset. 8309 If not found, return irelend. 8310 8311 Assuming relocations are sorted by r_offset, 8312 we find the relocation from `reloc' backward untill relocs, 8313 or find it from `reloc' forward untill irelend. */ 8314 8315static Elf_Internal_Rela * 8316find_relocs_at_address_addr (Elf_Internal_Rela *reloc, 8317 Elf_Internal_Rela *relocs, 8318 Elf_Internal_Rela *irelend, 8319 unsigned char reloc_type, 8320 bfd_vma offset_p) 8321{ 8322 Elf_Internal_Rela *rel_t = NULL; 8323 8324 /* First, we try to find a relocation of offset `offset_p', 8325 and then we use find_relocs_at_address to find specific type. */ 8326 8327 if (reloc->r_offset > offset_p) 8328 { 8329 /* Find backward. */ 8330 for (rel_t = reloc; 8331 rel_t >= relocs && rel_t->r_offset > offset_p; rel_t--) 8332 /* Do nothing. */; 8333 } 8334 else if (reloc->r_offset < offset_p) 8335 { 8336 /* Find forward. */ 8337 for (rel_t = reloc; 8338 rel_t < irelend && rel_t->r_offset < offset_p; rel_t++) 8339 /* Do nothing. */; 8340 } 8341 else 8342 rel_t = reloc; 8343 8344 /* Not found? */ 8345 if (rel_t < relocs || rel_t == irelend || rel_t->r_offset != offset_p) 8346 return irelend; 8347 8348 return find_relocs_at_address (rel_t, relocs, irelend, reloc_type); 8349} 8350 8351static bfd_boolean 8352nds32_elf_check_dup_relocs (Elf_Internal_Rela *reloc, 8353 Elf_Internal_Rela *internal_relocs, 8354 Elf_Internal_Rela *irelend, 8355 unsigned char reloc_type) 8356{ 8357 Elf_Internal_Rela *rel_t; 8358 8359 for (rel_t = reloc; 8360 rel_t >= internal_relocs && rel_t->r_offset == reloc->r_offset; 8361 rel_t--) 8362 if (ELF32_R_TYPE (rel_t->r_info) == reloc_type) 8363 { 8364 if (ELF32_R_SYM (rel_t->r_info) == ELF32_R_SYM (reloc->r_info) 8365 && rel_t->r_addend == reloc->r_addend) 8366 continue; 8367 return TRUE; 8368 } 8369 8370 for (rel_t = reloc; rel_t < irelend && rel_t->r_offset == reloc->r_offset; 8371 rel_t++) 8372 if (ELF32_R_TYPE (rel_t->r_info) == reloc_type) 8373 { 8374 if (ELF32_R_SYM (rel_t->r_info) == ELF32_R_SYM (reloc->r_info) 8375 && rel_t->r_addend == reloc->r_addend) 8376 continue; 8377 return TRUE; 8378 } 8379 8380 return FALSE; 8381} 8382 8383typedef struct nds32_elf_blank nds32_elf_blank_t; 8384struct nds32_elf_blank 8385{ 8386 /* Where the blank begins. */ 8387 bfd_vma offset; 8388 /* The size of the blank. */ 8389 bfd_vma size; 8390 /* The accumulative size before this blank. */ 8391 bfd_vma total_size; 8392 nds32_elf_blank_t *next; 8393 nds32_elf_blank_t *prev; 8394}; 8395 8396static nds32_elf_blank_t *blank_free_list = NULL; 8397 8398static nds32_elf_blank_t * 8399create_nds32_elf_blank (bfd_vma offset_p, bfd_vma size_p) 8400{ 8401 nds32_elf_blank_t *blank_t; 8402 8403 if (blank_free_list) 8404 { 8405 blank_t = blank_free_list; 8406 blank_free_list = blank_free_list->next; 8407 } 8408 else 8409 blank_t = bfd_malloc (sizeof (nds32_elf_blank_t)); 8410 8411 if (blank_t == NULL) 8412 return NULL; 8413 8414 blank_t->offset = offset_p; 8415 blank_t->size = size_p; 8416 blank_t->total_size = 0; 8417 blank_t->next = NULL; 8418 blank_t->prev = NULL; 8419 8420 return blank_t; 8421} 8422 8423static void 8424remove_nds32_elf_blank (nds32_elf_blank_t *blank_p) 8425{ 8426 if (blank_free_list) 8427 { 8428 blank_free_list->prev = blank_p; 8429 blank_p->next = blank_free_list; 8430 } 8431 else 8432 blank_p->next = NULL; 8433 8434 blank_p->prev = NULL; 8435 blank_free_list = blank_p; 8436} 8437 8438static void 8439clean_nds32_elf_blank (void) 8440{ 8441 nds32_elf_blank_t *blank_t; 8442 8443 while (blank_free_list) 8444 { 8445 blank_t = blank_free_list; 8446 blank_free_list = blank_free_list->next; 8447 free (blank_t); 8448 } 8449} 8450 8451static nds32_elf_blank_t * 8452search_nds32_elf_blank (nds32_elf_blank_t *blank_p, bfd_vma addr) 8453{ 8454 nds32_elf_blank_t *blank_t; 8455 8456 if (!blank_p) 8457 return NULL; 8458 blank_t = blank_p; 8459 8460 while (blank_t && addr < blank_t->offset) 8461 blank_t = blank_t->prev; 8462 while (blank_t && blank_t->next && addr >= blank_t->next->offset) 8463 blank_t = blank_t->next; 8464 8465 return blank_t; 8466} 8467 8468static bfd_vma 8469get_nds32_elf_blank_total (nds32_elf_blank_t **blank_p, bfd_vma addr, 8470 int overwrite) 8471{ 8472 nds32_elf_blank_t *blank_t; 8473 8474 blank_t = search_nds32_elf_blank (*blank_p, addr); 8475 if (!blank_t) 8476 return 0; 8477 8478 if (overwrite) 8479 *blank_p = blank_t; 8480 8481 if (addr < blank_t->offset + blank_t->size) 8482 return blank_t->total_size + (addr - blank_t->offset); 8483 else 8484 return blank_t->total_size + blank_t->size; 8485} 8486 8487static bfd_boolean 8488insert_nds32_elf_blank (nds32_elf_blank_t **blank_p, bfd_vma addr, bfd_vma len) 8489{ 8490 nds32_elf_blank_t *blank_t, *blank_t2; 8491 8492 if (!*blank_p) 8493 { 8494 *blank_p = create_nds32_elf_blank (addr, len); 8495 return *blank_p ? TRUE : FALSE; 8496 } 8497 8498 blank_t = search_nds32_elf_blank (*blank_p, addr); 8499 8500 if (blank_t == NULL) 8501 { 8502 blank_t = create_nds32_elf_blank (addr, len); 8503 if (!blank_t) 8504 return FALSE; 8505 while ((*blank_p)->prev != NULL) 8506 *blank_p = (*blank_p)->prev; 8507 blank_t->next = *blank_p; 8508 (*blank_p)->prev = blank_t; 8509 (*blank_p) = blank_t; 8510 return TRUE; 8511 } 8512 8513 if (addr < blank_t->offset + blank_t->size) 8514 { 8515 if (addr > blank_t->offset + blank_t->size) 8516 blank_t->size = addr - blank_t->offset; 8517 } 8518 else 8519 { 8520 blank_t2 = create_nds32_elf_blank (addr, len); 8521 if (!blank_t2) 8522 return FALSE; 8523 if (blank_t->next) 8524 { 8525 blank_t->next->prev = blank_t2; 8526 blank_t2->next = blank_t->next; 8527 } 8528 blank_t2->prev = blank_t; 8529 blank_t->next = blank_t2; 8530 *blank_p = blank_t2; 8531 } 8532 8533 return TRUE; 8534} 8535 8536static bfd_boolean 8537insert_nds32_elf_blank_recalc_total (nds32_elf_blank_t **blank_p, bfd_vma addr, 8538 bfd_vma len) 8539{ 8540 nds32_elf_blank_t *blank_t; 8541 8542 if (!insert_nds32_elf_blank (blank_p, addr, len)) 8543 return FALSE; 8544 8545 blank_t = *blank_p; 8546 8547 if (!blank_t->prev) 8548 { 8549 blank_t->total_size = 0; 8550 blank_t = blank_t->next; 8551 } 8552 8553 while (blank_t) 8554 { 8555 blank_t->total_size = blank_t->prev->total_size + blank_t->prev->size; 8556 blank_t = blank_t->next; 8557 } 8558 8559 return TRUE; 8560} 8561 8562static void 8563calc_nds32_blank_total (nds32_elf_blank_t *blank_p) 8564{ 8565 nds32_elf_blank_t *blank_t; 8566 bfd_vma total_size = 0; 8567 8568 if (!blank_p) 8569 return; 8570 8571 blank_t = blank_p; 8572 while (blank_t->prev) 8573 blank_t = blank_t->prev; 8574 while (blank_t) 8575 { 8576 blank_t->total_size = total_size; 8577 total_size += blank_t->size; 8578 blank_t = blank_t->next; 8579 } 8580} 8581 8582static bfd_boolean 8583nds32_elf_relax_delete_blanks (bfd *abfd, asection *sec, 8584 nds32_elf_blank_t *blank_p) 8585{ 8586 Elf_Internal_Shdr *symtab_hdr; /* Symbol table header of this bfd. */ 8587 Elf_Internal_Sym *isym = NULL; /* Symbol table of this bfd. */ 8588 Elf_Internal_Sym *isymend; /* Symbol entry iterator. */ 8589 unsigned int sec_shndx; /* The section the be relaxed. */ 8590 bfd_byte *contents; /* Contents data of iterating section. */ 8591 Elf_Internal_Rela *internal_relocs; 8592 Elf_Internal_Rela *irel; 8593 Elf_Internal_Rela *irelend; 8594 struct elf_link_hash_entry **sym_hashes; 8595 struct elf_link_hash_entry **end_hashes; 8596 unsigned int symcount; 8597 asection *sect; 8598 nds32_elf_blank_t *blank_t; 8599 nds32_elf_blank_t *blank_t2; 8600 nds32_elf_blank_t *blank_head; 8601 8602 blank_head = blank_t = blank_p; 8603 while (blank_head->prev != NULL) 8604 blank_head = blank_head->prev; 8605 while (blank_t->next != NULL) 8606 blank_t = blank_t->next; 8607 8608 if (blank_t->offset + blank_t->size <= sec->size) 8609 { 8610 blank_t->next = create_nds32_elf_blank (sec->size + 4, 0); 8611 blank_t->next->prev = blank_t; 8612 } 8613 if (blank_head->offset > 0) 8614 { 8615 blank_head->prev = create_nds32_elf_blank (0, 0); 8616 blank_head->prev->next = blank_head; 8617 blank_head = blank_head->prev; 8618 } 8619 8620 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 8621 8622 /* The deletion must stop at the next ALIGN reloc for an alignment 8623 power larger than the number of bytes we are deleting. */ 8624 8625 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 8626 if (!nds32_get_local_syms (abfd, sec, &isym)) 8627 return FALSE; 8628 8629 if (isym == NULL) 8630 { 8631 isym = bfd_elf_get_elf_syms (abfd, symtab_hdr, 8632 symtab_hdr->sh_info, 0, NULL, NULL, NULL); 8633 symtab_hdr->contents = (bfd_byte *) isym; 8634 } 8635 8636 if (isym == NULL || symtab_hdr->sh_info == 0) 8637 return FALSE; 8638 8639 blank_t = blank_head; 8640 calc_nds32_blank_total (blank_head); 8641 8642 for (sect = abfd->sections; sect != NULL; sect = sect->next) 8643 { 8644 /* Adjust all the relocs. */ 8645 8646 /* Relocations MUST be kept in memory, because relaxation adjust them. */ 8647 internal_relocs = _bfd_elf_link_read_relocs (abfd, sect, NULL, NULL, 8648 TRUE /* keep_memory */); 8649 irelend = internal_relocs + sect->reloc_count; 8650 8651 blank_t = blank_head; 8652 blank_t2 = blank_head; 8653 8654 if (!(sect->flags & SEC_RELOC)) 8655 continue; 8656 8657 nds32_get_section_contents (abfd, sect, &contents); 8658 8659 for (irel = internal_relocs; irel < irelend; irel++) 8660 { 8661 bfd_vma raddr; 8662 8663 if (ELF32_R_TYPE (irel->r_info) >= R_NDS32_DIFF8 8664 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_DIFF32 8665 && isym[ELF32_R_SYM (irel->r_info)].st_shndx == sec_shndx) 8666 { 8667 unsigned long val = 0; 8668 unsigned long mask; 8669 long before, between; 8670 long offset; 8671 8672 switch (ELF32_R_TYPE (irel->r_info)) 8673 { 8674 case R_NDS32_DIFF8: 8675 offset = bfd_get_8 (abfd, contents + irel->r_offset); 8676 break; 8677 case R_NDS32_DIFF16: 8678 offset = bfd_get_16 (abfd, contents + irel->r_offset); 8679 break; 8680 case R_NDS32_DIFF32: 8681 val = bfd_get_32 (abfd, contents + irel->r_offset); 8682 /* Get the signed bit and mask for the high part. The 8683 gcc will alarm when right shift 32-bit since the 8684 type size of long may be 32-bit. */ 8685 mask = 0 - (val >> 31); 8686 if (mask) 8687 offset = (val | (mask - 0xffffffff)); 8688 else 8689 offset = val; 8690 break; 8691 default: 8692 BFD_ASSERT (0); 8693 } 8694 8695 /* DIFF value 8696 0 |encoded in location| 8697 |------------|-------------------|--------- 8698 sym+off(addend) 8699 -- before ---| ***************** 8700 --------------------- between ---| 8701 8702 We only care how much data are relax between DIFF, 8703 marked as ***. */ 8704 8705 before = get_nds32_elf_blank_total (&blank_t, irel->r_addend, 0); 8706 between = get_nds32_elf_blank_total (&blank_t, 8707 irel->r_addend + offset, 0); 8708 if (between == before) 8709 goto done_adjust_diff; 8710 8711 switch (ELF32_R_TYPE (irel->r_info)) 8712 { 8713 case R_NDS32_DIFF8: 8714 bfd_put_8 (abfd, offset - (between - before), 8715 contents + irel->r_offset); 8716 break; 8717 case R_NDS32_DIFF16: 8718 bfd_put_16 (abfd, offset - (between - before), 8719 contents + irel->r_offset); 8720 break; 8721 case R_NDS32_DIFF32: 8722 bfd_put_32 (abfd, offset - (between - before), 8723 contents + irel->r_offset); 8724 break; 8725 } 8726 } 8727 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_DIFF_ULEB128 8728 && isym[ELF32_R_SYM (irel->r_info)].st_shndx == sec_shndx) 8729 { 8730 bfd_vma val = 0; 8731 unsigned int len = 0; 8732 unsigned long before, between; 8733 bfd_byte *endp, *p; 8734 8735 val = read_unsigned_leb128 (abfd, contents + irel->r_offset, 8736 &len); 8737 8738 before = get_nds32_elf_blank_total (&blank_t, irel->r_addend, 0); 8739 between = get_nds32_elf_blank_total (&blank_t, 8740 irel->r_addend + val, 0); 8741 if (between == before) 8742 goto done_adjust_diff; 8743 8744 p = contents + irel->r_offset; 8745 endp = p + len -1; 8746 memset (p, 0x80, len); 8747 *(endp) = 0; 8748 p = write_uleb128 (p, val - (between - before)) - 1; 8749 if (p < endp) 8750 *p |= 0x80; 8751 } 8752done_adjust_diff: 8753 8754 if (sec == sect) 8755 { 8756 raddr = irel->r_offset; 8757 irel->r_offset -= get_nds32_elf_blank_total (&blank_t2, 8758 irel->r_offset, 1); 8759 8760 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_NONE) 8761 continue; 8762 if (blank_t2 && blank_t2->next 8763 && (blank_t2->offset > raddr 8764 || blank_t2->next->offset <= raddr)) 8765 (*_bfd_error_handler) 8766 (_("%B: %s\n"), abfd, 8767 "Error: search_nds32_elf_blank reports wrong node"); 8768 8769 /* Mark reloc in deleted portion as NONE. 8770 For some relocs like R_NDS32_LABEL that doesn't modify the 8771 content in the section. R_NDS32_LABEL doesn't belong to the 8772 instruction in the section, so we should preserve it. */ 8773 if (raddr >= blank_t2->offset 8774 && raddr < blank_t2->offset + blank_t2->size 8775 && ELF32_R_TYPE (irel->r_info) != R_NDS32_LABEL 8776 && ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_REGION_BEGIN 8777 && ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_REGION_END 8778 && ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_ENTRY 8779 && ELF32_R_TYPE (irel->r_info) != R_NDS32_SUBTRAHEND 8780 && ELF32_R_TYPE (irel->r_info) != R_NDS32_MINUEND) 8781 { 8782 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 8783 R_NDS32_NONE); 8784 continue; 8785 } 8786 } 8787 8788 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_NONE 8789 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 8790 || ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_ENTRY) 8791 continue; 8792 8793 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info 8794 && isym[ELF32_R_SYM (irel->r_info)].st_shndx == sec_shndx 8795 && ELF_ST_TYPE (isym[ELF32_R_SYM (irel->r_info)].st_info) == STT_SECTION) 8796 { 8797 if (irel->r_addend <= sec->size) 8798 irel->r_addend -= 8799 get_nds32_elf_blank_total (&blank_t, irel->r_addend, 1); 8800 } 8801 } 8802 } 8803 8804 /* Adjust the local symbols defined in this section. */ 8805 blank_t = blank_head; 8806 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) 8807 { 8808 if (isym->st_shndx == sec_shndx) 8809 { 8810 if (isym->st_value <= sec->size) 8811 { 8812 bfd_vma ahead; 8813 bfd_vma orig_addr = isym->st_value; 8814 8815 ahead = get_nds32_elf_blank_total (&blank_t, isym->st_value, 1); 8816 isym->st_value -= ahead; 8817 8818 /* Adjust function size. */ 8819 if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC 8820 && isym->st_size > 0) 8821 isym->st_size -= 8822 get_nds32_elf_blank_total 8823 (&blank_t, orig_addr + isym->st_size, 0) - ahead; 8824 } 8825 } 8826 } 8827 8828 /* Now adjust the global symbols defined in this section. */ 8829 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 8830 - symtab_hdr->sh_info); 8831 sym_hashes = elf_sym_hashes (abfd); 8832 end_hashes = sym_hashes + symcount; 8833 blank_t = blank_head; 8834 for (; sym_hashes < end_hashes; sym_hashes++) 8835 { 8836 struct elf_link_hash_entry *sym_hash = *sym_hashes; 8837 8838 if ((sym_hash->root.type == bfd_link_hash_defined 8839 || sym_hash->root.type == bfd_link_hash_defweak) 8840 && sym_hash->root.u.def.section == sec) 8841 { 8842 if (sym_hash->root.u.def.value <= sec->size) 8843 { 8844 bfd_vma ahead; 8845 bfd_vma orig_addr = sym_hash->root.u.def.value; 8846 8847 ahead = get_nds32_elf_blank_total (&blank_t, sym_hash->root.u.def.value, 1); 8848 sym_hash->root.u.def.value -= ahead; 8849 8850 /* Adjust function size. */ 8851 if (sym_hash->type == STT_FUNC) 8852 sym_hash->size -= 8853 get_nds32_elf_blank_total 8854 (&blank_t, orig_addr + sym_hash->size, 0) - ahead; 8855 8856 } 8857 } 8858 } 8859 8860 contents = elf_section_data (sec)->this_hdr.contents; 8861 blank_t = blank_head; 8862 while (blank_t->next) 8863 { 8864 /* Actually delete the bytes. */ 8865 8866 /* If current blank is the last blank overlap with current section, 8867 go to finish process. */ 8868 if (sec->size <= (blank_t->next->offset)) 8869 break; 8870 8871 memmove (contents + blank_t->offset - blank_t->total_size, 8872 contents + blank_t->offset + blank_t->size, 8873 blank_t->next->offset - (blank_t->offset + blank_t->size)); 8874 8875 blank_t = blank_t->next; 8876 } 8877 8878 if (sec->size > (blank_t->offset + blank_t->size)) 8879 { 8880 /* There are remaining code between blank and section boundary. 8881 Move the remaining code to appropriate location. */ 8882 memmove (contents + blank_t->offset - blank_t->total_size, 8883 contents + blank_t->offset + blank_t->size, 8884 sec->size - (blank_t->offset + blank_t->size)); 8885 sec->size -= blank_t->total_size + blank_t->size; 8886 } 8887 else 8888 /* This blank is not entirely included in the section, 8889 reduce the section size by only part of the blank size. */ 8890 sec->size -= blank_t->total_size + (sec->size - blank_t->offset); 8891 8892 while (blank_head) 8893 { 8894 blank_t = blank_head; 8895 blank_head = blank_head->next; 8896 remove_nds32_elf_blank (blank_t); 8897 } 8898 8899 return TRUE; 8900} 8901 8902/* Get the contents of a section. */ 8903 8904static int 8905nds32_get_section_contents (bfd *abfd, asection *sec, bfd_byte **contents_p) 8906{ 8907 /* Get the section contents. */ 8908 if (elf_section_data (sec)->this_hdr.contents != NULL) 8909 *contents_p = elf_section_data (sec)->this_hdr.contents; 8910 else 8911 { 8912 if (!bfd_malloc_and_get_section (abfd, sec, contents_p)) 8913 return FALSE; 8914 elf_section_data (sec)->this_hdr.contents = *contents_p; 8915 } 8916 8917 return TRUE; 8918} 8919 8920/* Get the contents of the internal symbol of abfd. */ 8921 8922static int 8923nds32_get_local_syms (bfd *abfd, asection *sec ATTRIBUTE_UNUSED, 8924 Elf_Internal_Sym **isymbuf_p) 8925{ 8926 Elf_Internal_Shdr *symtab_hdr; 8927 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 8928 8929 /* Read this BFD's local symbols if we haven't done so already. */ 8930 if (*isymbuf_p == NULL && symtab_hdr->sh_info != 0) 8931 { 8932 *isymbuf_p = (Elf_Internal_Sym *) symtab_hdr->contents; 8933 if (*isymbuf_p == NULL) 8934 { 8935 *isymbuf_p = bfd_elf_get_elf_syms (abfd, symtab_hdr, 8936 symtab_hdr->sh_info, 0, 8937 NULL, NULL, NULL); 8938 if (*isymbuf_p == NULL) 8939 return FALSE; 8940 } 8941 } 8942 symtab_hdr->contents = (bfd_byte *) (*isymbuf_p); 8943 8944 return TRUE; 8945} 8946 8947/* Range of small data. */ 8948static bfd_vma sdata_range[2][2]; 8949static bfd_vma const sdata_init_range[2] = 8950{ ACCURATE_12BIT_S1, ACCURATE_19BIT }; 8951 8952static int 8953nds32_elf_insn_size (bfd *abfd ATTRIBUTE_UNUSED, 8954 bfd_byte *contents, bfd_vma addr) 8955{ 8956 unsigned long insn = bfd_getb32 (contents + addr); 8957 8958 if (insn & 0x80000000) 8959 return 2; 8960 8961 return 4; 8962} 8963 8964/* Set the gp relax range. We have to measure the safe range 8965 to do gp relaxation. */ 8966 8967static void 8968relax_range_measurement (bfd *abfd) 8969{ 8970 asection *sec_f, *sec_b; 8971 /* For upper bound. */ 8972 bfd_vma maxpgsz = get_elf_backend_data (abfd)->maxpagesize; 8973 bfd_vma align; 8974 static int decide_relax_range = 0; 8975 int i; 8976 int range_number = sizeof (sdata_init_range) / sizeof (sdata_init_range[0]); 8977 8978 if (decide_relax_range) 8979 return; 8980 decide_relax_range = 1; 8981 8982 if (sda_rela_sec == NULL) 8983 { 8984 /* Since there is no data sections, we assume the range is page size. */ 8985 for (i = 0; i < range_number; i++) 8986 { 8987 sdata_range[i][0] = sdata_init_range[i] - 0x1000; 8988 sdata_range[i][1] = sdata_init_range[i] - 0x1000; 8989 } 8990 return; 8991 } 8992 8993 /* Get the biggest alignment power after the gp located section. */ 8994 sec_f = sda_rela_sec->output_section; 8995 sec_b = sec_f->next; 8996 align = 0; 8997 while (sec_b != NULL) 8998 { 8999 if ((unsigned)(1 << sec_b->alignment_power) > align) 9000 align = (1 << sec_b->alignment_power); 9001 sec_b = sec_b->next; 9002 } 9003 9004 /* I guess we can not determine the section before 9005 gp located section, so we assume the align is max page size. */ 9006 for (i = 0; i < range_number; i++) 9007 { 9008 sdata_range[i][1] = sdata_init_range[i] - align; 9009 BFD_ASSERT (sdata_range[i][1] <= sdata_init_range[i]); 9010 sdata_range[i][0] = sdata_init_range[i] - maxpgsz; 9011 BFD_ASSERT (sdata_range[i][0] <= sdata_init_range[i]); 9012 } 9013} 9014 9015/* These are macros used to check flags encoded in r_addend. 9016 They are only used by nds32_elf_relax_section (). */ 9017#define GET_SEQ_LEN(addend) ((addend) & 0x000000ff) 9018#define IS_1ST_CONVERT(addend) ((addend) & 0x80000000) 9019#define IS_OPTIMIZE(addend) ((addend) & 0x40000000) 9020#define IS_16BIT_ON(addend) ((addend) & 0x20000000) 9021 9022/* Relax LONGCALL1 relocation for nds32_elf_relax_section. */ 9023 9024static bfd_boolean 9025nds32_elf_relax_longcall1 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9026 Elf_Internal_Rela *internal_relocs, int *insn_len, 9027 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9028 Elf_Internal_Shdr *symtab_hdr) 9029{ 9030 /* There are 3 variations for LONGCALL1 9031 case 4-4-2; 16-bit on, optimize off or optimize for space 9032 sethi ta, hi20(symbol) ; LONGCALL1/HI20 9033 ori ta, ta, lo12(symbol) ; LO12S0 9034 jral5 ta ; 9035 9036 case 4-4-4; 16-bit off, optimize don't care 9037 sethi ta, hi20(symbol) ; LONGCALL1/HI20 9038 ori ta, ta, lo12(symbol) ; LO12S0 9039 jral ta ; 9040 9041 case 4-4-4; 16-bit on, optimize for speed 9042 sethi ta, hi20(symbol) ; LONGCALL1/HI20 9043 ori ta, ta, lo12(symbol) ; LO12S0 9044 jral ta ; 9045 Check code for -mlong-calls output. */ 9046 9047 /* Get the reloc for the address from which the register is 9048 being loaded. This reloc will tell us which function is 9049 actually being called. */ 9050 9051 bfd_vma laddr; 9052 int seq_len; /* Original length of instruction sequence. */ 9053 uint32_t insn; 9054 Elf_Internal_Rela *hi_irelfn, *lo_irelfn, *irelend; 9055 int pic_ext_target = 0; 9056 bfd_signed_vma foff; 9057 uint16_t insn16; 9058 9059 irelend = internal_relocs + sec->reloc_count; 9060 seq_len = GET_SEQ_LEN (irel->r_addend); 9061 laddr = irel->r_offset; 9062 *insn_len = seq_len; 9063 9064 hi_irelfn = find_relocs_at_address_addr (irel, internal_relocs, irelend, 9065 R_NDS32_HI20_RELA, laddr); 9066 lo_irelfn = find_relocs_at_address_addr (irel, internal_relocs, irelend, 9067 R_NDS32_LO12S0_ORI_RELA, 9068 laddr + 4); 9069 9070 if (hi_irelfn == irelend || lo_irelfn == irelend) 9071 { 9072 (*_bfd_error_handler) 9073 ("%B: warning: R_NDS32_LONGCALL1 points to unrecognized" 9074 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9075 return FALSE; 9076 } 9077 9078 /* Get the value of the symbol referred to by the reloc. */ 9079 foff = calculate_offset (abfd, sec, hi_irelfn, isymbuf, symtab_hdr, 9080 &pic_ext_target); 9081 9082 /* This condition only happened when symbol is undefined. */ 9083 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 9084 || foff >= CONSERVATIVE_24BIT_S1) 9085 return FALSE; 9086 9087 /* Relax to: jal symbol; 25_PCREL */ 9088 /* For simplicity of coding, we are going to modify the section 9089 contents, the section relocs, and the BFD symbol table. We 9090 must tell the rest of the code not to free up this 9091 information. It would be possible to instead create a table 9092 of changes which have to be made, as is done in coff-mips.c; 9093 that would be more work, but would require less memory when 9094 the linker is run. */ 9095 9096 /* Replace the long call with a jal. */ 9097 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9098 R_NDS32_25_PCREL_RELA); 9099 irel->r_addend = hi_irelfn->r_addend; 9100 9101 /* We don't resolve this here but resolve it in relocate_section. */ 9102 insn = INSN_JAL; 9103 bfd_putb32 (insn, contents + irel->r_offset); 9104 9105 hi_irelfn->r_info = 9106 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_NDS32_NONE); 9107 lo_irelfn->r_info = 9108 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_NONE); 9109 *insn_len = 4; 9110 9111 if (seq_len & 0x2) 9112 { 9113 insn16 = NDS32_NOP16; 9114 bfd_putb16 (insn16, contents + irel->r_offset + *insn_len); 9115 lo_irelfn->r_info = 9116 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_INSN16); 9117 lo_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9118 *insn_len += 2; 9119 } 9120 return TRUE; 9121} 9122 9123#define CONVERT_CONDITION_CALL(insn) (((insn) & 0xffff0000) ^ 0x90000) 9124/* Relax LONGCALL2 relocation for nds32_elf_relax_section. */ 9125 9126static bfd_boolean 9127nds32_elf_relax_longcall2 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9128 Elf_Internal_Rela *internal_relocs, int *insn_len, 9129 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9130 Elf_Internal_Shdr *symtab_hdr) 9131{ 9132 /* bltz rt, .L1 ; LONGCALL2 9133 jal symbol ; 25_PCREL 9134 .L1: */ 9135 9136 /* Get the reloc for the address from which the register is 9137 being loaded. This reloc will tell us which function is 9138 actually being called. */ 9139 9140 bfd_vma laddr; 9141 uint32_t insn; 9142 Elf_Internal_Rela *i1_irelfn, *cond_irelfn, *irelend; 9143 int pic_ext_target = 0; 9144 bfd_signed_vma foff; 9145 9146 irelend = internal_relocs + sec->reloc_count; 9147 laddr = irel->r_offset; 9148 i1_irelfn = 9149 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9150 R_NDS32_25_PCREL_RELA, laddr + 4); 9151 9152 if (i1_irelfn == irelend) 9153 { 9154 (*_bfd_error_handler) 9155 ("%B: warning: R_NDS32_LONGCALL2 points to unrecognized" 9156 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9157 return FALSE; 9158 } 9159 9160 insn = bfd_getb32 (contents + laddr); 9161 9162 /* Get the value of the symbol referred to by the reloc. */ 9163 foff = calculate_offset (abfd, sec, i1_irelfn, isymbuf, symtab_hdr, 9164 &pic_ext_target); 9165 9166 if (foff == 0 || foff < -CONSERVATIVE_16BIT_S1 9167 || foff >= CONSERVATIVE_16BIT_S1) 9168 return FALSE; 9169 9170 /* Relax to bgezal rt, label ; 17_PCREL 9171 or bltzal rt, label ; 17_PCREL */ 9172 9173 /* Convert to complimentary conditional call. */ 9174 insn = CONVERT_CONDITION_CALL (insn); 9175 9176 /* For simplicity of coding, we are going to modify the section 9177 contents, the section relocs, and the BFD symbol table. We 9178 must tell the rest of the code not to free up this 9179 information. It would be possible to instead create a table 9180 of changes which have to be made, as is done in coff-mips.c; 9181 that would be more work, but would require less memory when 9182 the linker is run. */ 9183 9184 /* Clean unnessary relocations. */ 9185 i1_irelfn->r_info = 9186 ELF32_R_INFO (ELF32_R_SYM (i1_irelfn->r_info), R_NDS32_NONE); 9187 cond_irelfn = 9188 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9189 R_NDS32_17_PCREL_RELA, laddr); 9190 if (cond_irelfn != irelend) 9191 cond_irelfn->r_info = 9192 ELF32_R_INFO (ELF32_R_SYM (cond_irelfn->r_info), R_NDS32_NONE); 9193 9194 /* Replace the long call with a bgezal. */ 9195 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (i1_irelfn->r_info), 9196 R_NDS32_17_PCREL_RELA); 9197 irel->r_addend = i1_irelfn->r_addend; 9198 9199 bfd_putb32 (insn, contents + irel->r_offset); 9200 9201 *insn_len = 4; 9202 return TRUE; 9203} 9204 9205/* Relax LONGCALL3 relocation for nds32_elf_relax_section. */ 9206 9207static bfd_boolean 9208nds32_elf_relax_longcall3 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9209 Elf_Internal_Rela *internal_relocs, int *insn_len, 9210 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9211 Elf_Internal_Shdr *symtab_hdr) 9212{ 9213 /* There are 3 variations for LONGCALL3 9214 case 4-4-4-2; 16-bit on, optimize off or optimize for space 9215 bltz rt, $1 ; LONGCALL3 9216 sethi ta, hi20(symbol) ; HI20 9217 ori ta, ta, lo12(symbol) ; LO12S0 9218 jral5 ta ; 9219 $1 9220 9221 case 4-4-4-4; 16-bit off, optimize don't care 9222 bltz rt, $1 ; LONGCALL3 9223 sethi ta, hi20(symbol) ; HI20 9224 ori ta, ta, lo12(symbol) ; LO12S0 9225 jral ta ; 9226 $1 9227 9228 case 4-4-4-4; 16-bit on, optimize for speed 9229 bltz rt, $1 ; LONGCALL3 9230 sethi ta, hi20(symbol) ; HI20 9231 ori ta, ta, lo12(symbol) ; LO12S0 9232 jral ta ; 9233 $1 */ 9234 9235 /* Get the reloc for the address from which the register is 9236 being loaded. This reloc will tell us which function is 9237 actually being called. */ 9238 9239 bfd_vma laddr; 9240 int seq_len; /* Original length of instruction sequence. */ 9241 uint32_t insn; 9242 Elf_Internal_Rela *hi_irelfn, *lo_irelfn, *cond_irelfn, *irelend; 9243 int pic_ext_target = 0; 9244 bfd_signed_vma foff; 9245 uint16_t insn16; 9246 9247 irelend = internal_relocs + sec->reloc_count; 9248 seq_len = GET_SEQ_LEN (irel->r_addend); 9249 laddr = irel->r_offset; 9250 *insn_len = seq_len; 9251 9252 hi_irelfn = 9253 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9254 R_NDS32_HI20_RELA, laddr + 4); 9255 lo_irelfn = 9256 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9257 R_NDS32_LO12S0_ORI_RELA, laddr + 8); 9258 9259 if (hi_irelfn == irelend || lo_irelfn == irelend) 9260 { 9261 (*_bfd_error_handler) 9262 ("%B: warning: R_NDS32_LONGCALL3 points to unrecognized" 9263 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9264 return FALSE; 9265 } 9266 9267 /* Get the value of the symbol referred to by the reloc. */ 9268 foff = calculate_offset (abfd, sec, hi_irelfn, isymbuf, symtab_hdr, 9269 &pic_ext_target); 9270 9271 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 9272 || foff >= CONSERVATIVE_24BIT_S1) 9273 return FALSE; 9274 9275 insn = bfd_getb32 (contents + laddr); 9276 if (foff >= -CONSERVATIVE_16BIT_S1 && foff < CONSERVATIVE_16BIT_S1) 9277 { 9278 /* Relax to bgezal rt, label ; 17_PCREL 9279 or bltzal rt, label ; 17_PCREL */ 9280 9281 /* Convert to complimentary conditional call. */ 9282 insn = CONVERT_CONDITION_CALL (insn); 9283 bfd_putb32 (insn, contents + irel->r_offset); 9284 9285 *insn_len = 4; 9286 irel->r_info = 9287 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_NDS32_NONE); 9288 hi_irelfn->r_info = 9289 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_NDS32_NONE); 9290 lo_irelfn->r_info = 9291 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_NONE); 9292 9293 cond_irelfn = 9294 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9295 R_NDS32_17_PCREL_RELA, laddr); 9296 if (cond_irelfn != irelend) 9297 { 9298 cond_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9299 R_NDS32_17_PCREL_RELA); 9300 cond_irelfn->r_addend = hi_irelfn->r_addend; 9301 } 9302 9303 if (seq_len & 0x2) 9304 { 9305 insn16 = NDS32_NOP16; 9306 bfd_putb16 (insn16, contents + irel->r_offset + *insn_len); 9307 hi_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9308 R_NDS32_INSN16); 9309 hi_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9310 insn_len += 2; 9311 } 9312 } 9313 else if (foff >= -CONSERVATIVE_24BIT_S1 && foff < CONSERVATIVE_24BIT_S1) 9314 { 9315 /* Relax to the following instruction sequence 9316 bltz rt, $1 ; LONGCALL2 9317 jal symbol ; 25_PCREL 9318 $1 */ 9319 *insn_len = 8; 9320 insn = INSN_JAL; 9321 bfd_putb32 (insn, contents + hi_irelfn->r_offset); 9322 9323 hi_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9324 R_NDS32_25_PCREL_RELA); 9325 irel->r_info = 9326 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_LONGCALL2); 9327 9328 lo_irelfn->r_info = 9329 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_NONE); 9330 9331 if (seq_len & 0x2) 9332 { 9333 insn16 = NDS32_NOP16; 9334 bfd_putb16 (insn16, contents + irel->r_offset + *insn_len); 9335 lo_irelfn->r_info = 9336 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_INSN16); 9337 lo_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9338 insn_len += 2; 9339 } 9340 } 9341 return TRUE; 9342} 9343 9344/* Relax LONGJUMP1 relocation for nds32_elf_relax_section. */ 9345 9346static bfd_boolean 9347nds32_elf_relax_longjump1 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9348 Elf_Internal_Rela *internal_relocs, int *insn_len, 9349 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9350 Elf_Internal_Shdr *symtab_hdr) 9351{ 9352 /* There are 3 variations for LONGJUMP1 9353 case 4-4-2; 16-bit bit on, optimize off or optimize for space 9354 sethi ta, hi20(symbol) ; LONGJUMP1/HI20 9355 ori ta, ta, lo12(symbol) ; LO12S0 9356 jr5 ta ; 9357 9358 case 4-4-4; 16-bit off, optimize don't care 9359 sethi ta, hi20(symbol) ; LONGJUMP1/HI20 9360 ori ta, ta, lo12(symbol) ; LO12S0 9361 jr ta ; 9362 9363 case 4-4-4; 16-bit on, optimize for speed 9364 sethi ta, hi20(symbol) ; LONGJUMP1/HI20 9365 ori ta, ta, lo12(symbol) ; LO12S0 9366 jr ta ; */ 9367 9368 /* Get the reloc for the address from which the register is 9369 being loaded. This reloc will tell us which function is 9370 actually being called. */ 9371 9372 bfd_vma laddr; 9373 int seq_len; /* Original length of instruction sequence. */ 9374 int insn16_on; /* 16-bit on/off. */ 9375 uint32_t insn; 9376 Elf_Internal_Rela *hi_irelfn, *lo_irelfn, *irelend; 9377 int pic_ext_target = 0; 9378 bfd_signed_vma foff; 9379 uint16_t insn16; 9380 unsigned long reloc; 9381 9382 irelend = internal_relocs + sec->reloc_count; 9383 seq_len = GET_SEQ_LEN (irel->r_addend); 9384 laddr = irel->r_offset; 9385 *insn_len = seq_len; 9386 insn16_on = IS_16BIT_ON (irel->r_addend); 9387 9388 hi_irelfn = 9389 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9390 R_NDS32_HI20_RELA, laddr); 9391 lo_irelfn = 9392 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9393 R_NDS32_LO12S0_ORI_RELA, laddr + 4); 9394 if (hi_irelfn == irelend || lo_irelfn == irelend) 9395 { 9396 (*_bfd_error_handler) 9397 ("%B: warning: R_NDS32_LONGJUMP1 points to unrecognized" 9398 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9399 return FALSE; 9400 } 9401 9402 /* Get the value of the symbol referred to by the reloc. */ 9403 foff = calculate_offset (abfd, sec, hi_irelfn, isymbuf, symtab_hdr, 9404 &pic_ext_target); 9405 9406 if (pic_ext_target || foff == 0 || foff >= CONSERVATIVE_24BIT_S1 9407 || foff < -CONSERVATIVE_24BIT_S1) 9408 return FALSE; 9409 9410 if (insn16_on && foff >= -ACCURATE_8BIT_S1 9411 && foff < ACCURATE_8BIT_S1 && (seq_len & 0x2)) 9412 { 9413 /* j8 label */ 9414 /* 16-bit on, but not optimized for speed. */ 9415 reloc = R_NDS32_9_PCREL_RELA; 9416 insn16 = INSN_J8; 9417 bfd_putb16 (insn16, contents + irel->r_offset); 9418 *insn_len = 2; 9419 irel->r_info = 9420 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 9421 } 9422 else 9423 { 9424 /* j label */ 9425 reloc = R_NDS32_25_PCREL_RELA; 9426 insn = INSN_J; 9427 bfd_putb32 (insn, contents + irel->r_offset); 9428 *insn_len = 4; 9429 irel->r_info = 9430 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_INSN16); 9431 irel->r_addend = 0; 9432 } 9433 9434 hi_irelfn->r_info = 9435 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), reloc); 9436 lo_irelfn->r_info = 9437 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), R_NDS32_NONE); 9438 9439 if ((seq_len & 0x2) && ((*insn_len & 2) == 0)) 9440 { 9441 insn16 = NDS32_NOP16; 9442 bfd_putb16 (insn16, contents + irel->r_offset + *insn_len); 9443 lo_irelfn->r_info = 9444 ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), 9445 R_NDS32_INSN16); 9446 lo_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9447 *insn_len += 2; 9448 } 9449 return TRUE; 9450} 9451 9452/* Revert condition branch. This function does not check if the input 9453 instruction is condition branch or not. */ 9454 9455static void 9456nds32_elf_convert_branch (uint16_t insn16, uint32_t insn, 9457 uint16_t *re_insn16, uint32_t *re_insn) 9458{ 9459 uint32_t comp_insn = 0; 9460 uint16_t comp_insn16 = 0; 9461 9462 if (insn) 9463 { 9464 if (N32_OP6 (insn) == N32_OP6_BR1) 9465 { 9466 /* beqs label. */ 9467 comp_insn = (insn ^ 0x4000) & 0xffffc000; 9468 if (N32_IS_RT3 (insn) && N32_RA5 (insn) == REG_R5) 9469 { 9470 /* Insn can be contracted to 16-bit implied r5. */ 9471 comp_insn16 = 9472 (comp_insn & 0x4000) ? INSN_BNES38 : INSN_BEQS38; 9473 comp_insn16 |= (N32_RT5 (insn) & 0x7) << 8; 9474 } 9475 } 9476 else if (N32_OP6 (insn) == N32_OP6_BR3) 9477 { 9478 /* bnec $ta, imm11, label. */ 9479 comp_insn = (insn ^ 0x80000) & 0xffffff00; 9480 } 9481 else 9482 { 9483 comp_insn = (insn ^ 0x10000) & 0xffffc000; 9484 if (N32_BR2_SUB (insn) == N32_BR2_BEQZ 9485 || N32_BR2_SUB (insn) == N32_BR2_BNEZ) 9486 { 9487 if (N32_IS_RT3 (insn)) 9488 { 9489 /* Insn can be contracted to 16-bit. */ 9490 comp_insn16 = 9491 (comp_insn & 0x10000) ? INSN_BNEZ38 : INSN_BEQZ38; 9492 comp_insn16 |= (N32_RT5 (insn) & 0x7) << 8; 9493 } 9494 else if (N32_RT5 (insn) == REG_R15) 9495 { 9496 /* Insn can be contracted to 16-bit. */ 9497 comp_insn16 = 9498 (comp_insn & 0x10000) ? INSN_BNES38 : INSN_BEQS38; 9499 } 9500 } 9501 } 9502 } 9503 else 9504 { 9505 switch ((insn16 & 0xf000) >> 12) 9506 { 9507 case 0xc: 9508 /* beqz38 or bnez38 */ 9509 comp_insn16 = (insn16 ^ 0x0800) & 0xff00; 9510 comp_insn = (comp_insn16 & 0x0800) ? INSN_BNEZ : INSN_BEQZ; 9511 comp_insn |= ((comp_insn16 & 0x0700) >> 8) << 20; 9512 break; 9513 9514 case 0xd: 9515 /* beqs38 or bnes38 */ 9516 comp_insn16 = (insn16 ^ 0x0800) & 0xff00; 9517 comp_insn = (comp_insn16 & 0x0800) ? INSN_BNE : INSN_BEQ; 9518 comp_insn |= (((comp_insn16 & 0x0700) >> 8) << 20) 9519 | (REG_R5 << 15); 9520 break; 9521 9522 case 0xe: 9523 /* beqzS8 or bnezS8 */ 9524 comp_insn16 = (insn16 ^ 0x0100) & 0xff00; 9525 comp_insn = (comp_insn16 & 0x0100) ? INSN_BNEZ : INSN_BEQZ; 9526 comp_insn |= REG_R15 << 20; 9527 break; 9528 9529 default: 9530 break; 9531 } 9532 } 9533 if (comp_insn && re_insn) 9534 *re_insn = comp_insn; 9535 if (comp_insn16 && re_insn16) 9536 *re_insn16 = comp_insn16; 9537} 9538 9539/* Relax LONGJUMP2 relocation for nds32_elf_relax_section. */ 9540 9541static bfd_boolean 9542nds32_elf_relax_longjump2 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9543 Elf_Internal_Rela *internal_relocs, int *insn_len, 9544 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9545 Elf_Internal_Shdr *symtab_hdr) 9546{ 9547 /* There are 3 variations for LONGJUMP2 9548 case 2-4; 1st insn convertible, 16-bit on, 9549 optimize off or optimize for space 9550 bnes38 rt, ra, $1 ; LONGJUMP2 9551 j label ; 25_PCREL 9552 $1: 9553 9554 case 4-4; 1st insn not convertible 9555 bne rt, ra, $1 ; LONGJUMP2 9556 j label ; 25_PCREL 9557 $1: 9558 9559 case 4-4; 1st insn convertible, 16-bit on, optimize for speed 9560 bne rt, ra, $1 ; LONGJUMP2 9561 j label ; 25_PCREL 9562 $1: */ 9563 9564 /* Get the reloc for the address from which the register is 9565 being loaded. This reloc will tell us which function is 9566 actually being called. */ 9567 9568 bfd_vma laddr; 9569 int seq_len; /* Original length of instruction sequence. */ 9570 Elf_Internal_Rela *i2_irelfn, *cond_irelfn, *irelend; 9571 int pic_ext_target = 0, first_size; 9572 unsigned int i; 9573 bfd_signed_vma foff; 9574 uint32_t insn, re_insn = 0; 9575 uint16_t insn16, re_insn16 = 0; 9576 unsigned long reloc, cond_reloc; 9577 9578 enum elf_nds32_reloc_type checked_types[] = 9579 { R_NDS32_15_PCREL_RELA, R_NDS32_9_PCREL_RELA }; 9580 9581 irelend = internal_relocs + sec->reloc_count; 9582 seq_len = GET_SEQ_LEN (irel->r_addend); 9583 laddr = irel->r_offset; 9584 *insn_len = seq_len; 9585 first_size = (seq_len == 6) ? 2 : 4; 9586 9587 i2_irelfn = 9588 find_relocs_at_address_addr (irel, internal_relocs, 9589 irelend, R_NDS32_25_PCREL_RELA, 9590 laddr + first_size); 9591 9592 for (i = 0; i < sizeof (checked_types) / sizeof(checked_types[0]); i++) 9593 { 9594 cond_irelfn = 9595 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9596 checked_types[i], laddr); 9597 if (cond_irelfn != irelend) 9598 break; 9599 } 9600 9601 if (i2_irelfn == irelend || cond_irelfn == irelend) 9602 { 9603 (*_bfd_error_handler) 9604 ("%B: warning: R_NDS32_LONGJUMP2 points to unrecognized" 9605 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9606 return FALSE; 9607 } 9608 9609 /* Get the value of the symbol referred to by the reloc. */ 9610 foff = 9611 calculate_offset (abfd, sec, i2_irelfn, isymbuf, symtab_hdr, 9612 &pic_ext_target); 9613 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_16BIT_S1 9614 || foff >= CONSERVATIVE_16BIT_S1) 9615 return FALSE; 9616 9617 /* Get the all corresponding instructions. */ 9618 if (first_size == 4) 9619 { 9620 insn = bfd_getb32 (contents + laddr); 9621 nds32_elf_convert_branch (0, insn, &re_insn16, &re_insn); 9622 } 9623 else 9624 { 9625 insn16 = bfd_getb16 (contents + laddr); 9626 nds32_elf_convert_branch (insn16, 0, &re_insn16, &re_insn); 9627 } 9628 9629 if (re_insn16 && foff >= -(ACCURATE_8BIT_S1 - first_size) 9630 && foff < ACCURATE_8BIT_S1 - first_size) 9631 { 9632 if (first_size == 4) 9633 { 9634 /* Don't convert it to 16-bit now, keep this as relaxable for 9635 ``label reloc; INSN16''. */ 9636 9637 /* Save comp_insn32 to buffer. */ 9638 bfd_putb32 (re_insn, contents + irel->r_offset); 9639 *insn_len = 4; 9640 reloc = (N32_OP6 (re_insn) == N32_OP6_BR1) ? 9641 R_NDS32_15_PCREL_RELA : R_NDS32_17_PCREL_RELA; 9642 cond_reloc = R_NDS32_INSN16; 9643 } 9644 else 9645 { 9646 bfd_putb16 (re_insn16, contents + irel->r_offset); 9647 *insn_len = 2; 9648 reloc = R_NDS32_9_PCREL_RELA; 9649 cond_reloc = R_NDS32_NONE; 9650 } 9651 } 9652 else if (N32_OP6 (re_insn) == N32_OP6_BR1 9653 && (foff >= -(ACCURATE_14BIT_S1 - first_size) 9654 && foff < ACCURATE_14BIT_S1 - first_size)) 9655 { 9656 /* beqs label ; 15_PCREL */ 9657 bfd_putb32 (re_insn, contents + irel->r_offset); 9658 *insn_len = 4; 9659 reloc = R_NDS32_15_PCREL_RELA; 9660 cond_reloc = R_NDS32_NONE; 9661 } 9662 else if (N32_OP6 (re_insn) == N32_OP6_BR2 9663 && foff >= -CONSERVATIVE_16BIT_S1 9664 && foff < CONSERVATIVE_16BIT_S1) 9665 { 9666 /* beqz label ; 17_PCREL */ 9667 bfd_putb32 (re_insn, contents + irel->r_offset); 9668 *insn_len = 4; 9669 reloc = R_NDS32_17_PCREL_RELA; 9670 cond_reloc = R_NDS32_NONE; 9671 } 9672 else 9673 return FALSE; 9674 9675 /* Set all relocations. */ 9676 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (i2_irelfn->r_info), reloc); 9677 irel->r_addend = i2_irelfn->r_addend; 9678 9679 cond_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irelfn->r_info), 9680 cond_reloc); 9681 cond_irelfn->r_addend = 0; 9682 9683 if ((seq_len ^ *insn_len ) & 0x2) 9684 { 9685 insn16 = NDS32_NOP16; 9686 bfd_putb16 (insn16, contents + irel->r_offset + 4); 9687 i2_irelfn->r_offset = 4; 9688 i2_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (i2_irelfn->r_info), 9689 R_NDS32_INSN16); 9690 i2_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9691 *insn_len += 2; 9692 } 9693 else 9694 i2_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (i2_irelfn->r_info), 9695 R_NDS32_NONE); 9696 return TRUE; 9697} 9698 9699/* Relax LONGJUMP3 relocation for nds32_elf_relax_section. */ 9700 9701static bfd_boolean 9702nds32_elf_relax_longjump3 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9703 Elf_Internal_Rela *internal_relocs, int *insn_len, 9704 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9705 Elf_Internal_Shdr *symtab_hdr) 9706{ 9707 /* There are 5 variations for LONGJUMP3 9708 case 1: 2-4-4-2; 1st insn convertible, 16-bit on, 9709 optimize off or optimize for space 9710 bnes38 rt, ra, $1 ; LONGJUMP3 9711 sethi ta, hi20(symbol) ; HI20 9712 ori ta, ta, lo12(symbol) ; LO12S0 9713 jr5 ta ; 9714 $1: ; 9715 9716 case 2: 2-4-4-2; 1st insn convertible, 16-bit on, optimize for speed 9717 bnes38 rt, ra, $1 ; LONGJUMP3 9718 sethi ta, hi20(symbol) ; HI20 9719 ori ta, ta, lo12(symbol) ; LO12S0 9720 jr5 ta ; 9721 $1: ; LABEL 9722 9723 case 3: 4-4-4-2; 1st insn not convertible, 16-bit on, 9724 optimize off or optimize for space 9725 bne rt, ra, $1 ; LONGJUMP3 9726 sethi ta, hi20(symbol) ; HI20 9727 ori ta, ta, lo12(symbol) ; LO12S0 9728 jr5 ta ; 9729 $1: ; 9730 9731 case 4: 4-4-4-4; 1st insn don't care, 16-bit off, optimize don't care 9732 16-bit off if no INSN16 9733 bne rt, ra, $1 ; LONGJUMP3 9734 sethi ta, hi20(symbol) ; HI20 9735 ori ta, ta, lo12(symbol) ; LO12S0 9736 jr ta ; 9737 $1: ; 9738 9739 case 5: 4-4-4-4; 1st insn not convertible, 16-bit on, optimize for speed 9740 16-bit off if no INSN16 9741 bne rt, ra, $1 ; LONGJUMP3 9742 sethi ta, hi20(symbol) ; HI20 9743 ori ta, ta, lo12(symbol) ; LO12S0 9744 jr ta ; 9745 $1: ; LABEL */ 9746 9747 /* Get the reloc for the address from which the register is 9748 being loaded. This reloc will tell us which function is 9749 actually being called. */ 9750 enum elf_nds32_reloc_type checked_types[] = 9751 { R_NDS32_15_PCREL_RELA, R_NDS32_9_PCREL_RELA }; 9752 9753 int reloc_off = 0, cond_removed = 0, convertible; 9754 bfd_vma laddr; 9755 int seq_len; /* Original length of instruction sequence. */ 9756 Elf_Internal_Rela *hi_irelfn, *lo_irelfn, *cond_irelfn, *irelend; 9757 int pic_ext_target = 0, first_size; 9758 unsigned int i; 9759 bfd_signed_vma foff; 9760 uint32_t insn, re_insn = 0; 9761 uint16_t insn16, re_insn16 = 0; 9762 unsigned long reloc, cond_reloc; 9763 9764 irelend = internal_relocs + sec->reloc_count; 9765 seq_len = GET_SEQ_LEN (irel->r_addend); 9766 laddr = irel->r_offset; 9767 *insn_len = seq_len; 9768 9769 convertible = IS_1ST_CONVERT (irel->r_addend); 9770 9771 if (convertible) 9772 first_size = 2; 9773 else 9774 first_size = 4; 9775 9776 /* Get all needed relocations. */ 9777 hi_irelfn = 9778 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9779 R_NDS32_HI20_RELA, laddr + first_size); 9780 lo_irelfn = 9781 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9782 R_NDS32_LO12S0_ORI_RELA, 9783 laddr + first_size + 4); 9784 9785 for (i = 0; i < sizeof (checked_types) / sizeof (checked_types[0]); i++) 9786 { 9787 cond_irelfn = 9788 find_relocs_at_address_addr (irel, internal_relocs, irelend, 9789 checked_types[i], laddr); 9790 if (cond_irelfn != irelend) 9791 break; 9792 } 9793 9794 if (hi_irelfn == irelend || lo_irelfn == irelend || cond_irelfn == irelend) 9795 { 9796 (*_bfd_error_handler) 9797 ("%B: warning: R_NDS32_LONGJUMP3 points to unrecognized" 9798 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9799 return FALSE; 9800 } 9801 9802 /* Get the value of the symbol referred to by the reloc. */ 9803 foff = calculate_offset (abfd, sec, hi_irelfn, isymbuf, symtab_hdr, 9804 &pic_ext_target); 9805 9806 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 9807 || foff >= CONSERVATIVE_24BIT_S1) 9808 return FALSE; 9809 9810 /* Get the all corresponding instructions. */ 9811 if (first_size == 4) 9812 { 9813 insn = bfd_getb32 (contents + laddr); 9814 nds32_elf_convert_branch (0, insn, &re_insn16, &re_insn); 9815 } 9816 else 9817 { 9818 insn16 = bfd_getb16 (contents + laddr); 9819 nds32_elf_convert_branch (insn16, 0, &re_insn16, &re_insn); 9820 } 9821 9822 /* For simplicity of coding, we are going to modify the section 9823 contents, the section relocs, and the BFD symbol table. We 9824 must tell the rest of the code not to free up this 9825 information. It would be possible to instead create a table 9826 of changes which have to be made, as is done in coff-mips.c; 9827 that would be more work, but would require less memory when 9828 the linker is run. */ 9829 9830 if (re_insn16 && foff >= -ACCURATE_8BIT_S1 - first_size 9831 && foff < ACCURATE_8BIT_S1 - first_size) 9832 { 9833 if (!(seq_len & 0x2)) 9834 { 9835 /* Don't convert it to 16-bit now, keep this as relaxable 9836 for ``label reloc; INSN1a''6. */ 9837 /* Save comp_insn32 to buffer. */ 9838 bfd_putb32 (re_insn, contents + irel->r_offset); 9839 *insn_len = 4; 9840 reloc = (N32_OP6 (re_insn) == N32_OP6_BR1) ? 9841 R_NDS32_15_PCREL_RELA : R_NDS32_17_PCREL_RELA; 9842 cond_reloc = R_NDS32_INSN16; 9843 } 9844 else 9845 { 9846 /* Not optimize for speed; convert sequence to 16-bit. */ 9847 /* Save comp_insn16 to buffer. */ 9848 bfd_putb16 (re_insn16, contents + irel->r_offset); 9849 *insn_len = 2; 9850 reloc = R_NDS32_9_PCREL_RELA; 9851 cond_reloc = R_NDS32_NONE; 9852 } 9853 cond_removed = 1; 9854 } 9855 else if (N32_OP6 (re_insn) == N32_OP6_BR1 9856 && (foff >= -(ACCURATE_14BIT_S1 - first_size) 9857 && foff < ACCURATE_14BIT_S1 - first_size)) 9858 { 9859 /* beqs label ; 15_PCREL */ 9860 bfd_putb32 (re_insn, contents + irel->r_offset); 9861 *insn_len = 4; 9862 reloc = R_NDS32_15_PCREL_RELA; 9863 cond_reloc = R_NDS32_NONE; 9864 cond_removed = 1; 9865 } 9866 else if (N32_OP6 (re_insn) == N32_OP6_BR2 9867 && foff >= -CONSERVATIVE_16BIT_S1 9868 && foff < CONSERVATIVE_16BIT_S1) 9869 { 9870 /* beqz label ; 17_PCREL */ 9871 bfd_putb32 (re_insn, contents + irel->r_offset); 9872 *insn_len = 4; 9873 reloc = R_NDS32_17_PCREL_RELA; 9874 cond_reloc = R_NDS32_NONE; 9875 cond_removed = 1; 9876 } 9877 else if (foff >= -CONSERVATIVE_24BIT_S1 - reloc_off 9878 && foff < CONSERVATIVE_24BIT_S1 - reloc_off) 9879 { 9880 /* Relax to one of the following 3 variations 9881 9882 case 2-4; 1st insn convertible, 16-bit on, optimize off or optimize 9883 for space 9884 bnes38 rt, $1 ; LONGJUMP2 9885 j label ; 25_PCREL 9886 $1 9887 9888 case 4-4; 1st insn not convertible, others don't care 9889 bne rt, ra, $1 ; LONGJUMP2 9890 j label ; 25_PCREL 9891 $1 9892 9893 case 4-4; 1st insn convertible, 16-bit on, optimize for speed 9894 bne rt, ra, $1 ; LONGJUMP2 9895 j label ; 25_PCREL 9896 $1 */ 9897 9898 /* Offset for first instruction. */ 9899 9900 /* Use j label as second instruction. */ 9901 *insn_len = 4 + first_size; 9902 insn = INSN_J; 9903 bfd_putb32 (insn, contents + hi_irelfn->r_offset); 9904 reloc = R_NDS32_LONGJUMP2; 9905 cond_reloc = R_NDS32_25_PLTREL; 9906 } 9907 else 9908 return FALSE; 9909 9910 if (cond_removed == 1) 9911 { 9912 /* Set all relocations. */ 9913 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), reloc); 9914 irel->r_addend = hi_irelfn->r_addend; 9915 9916 cond_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irelfn->r_info), 9917 cond_reloc); 9918 cond_irelfn->r_addend = 0; 9919 hi_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9920 R_NDS32_NONE); 9921 } 9922 else 9923 { 9924 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), reloc); 9925 irel->r_addend = irel->r_addend; 9926 hi_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), 9927 cond_reloc); 9928 } 9929 9930 if ((seq_len ^ *insn_len ) & 0x2) 9931 { 9932 insn16 = NDS32_NOP16; 9933 bfd_putb16 (insn16, contents + irel->r_offset + *insn_len); 9934 lo_irelfn->r_offset = *insn_len; 9935 lo_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), 9936 R_NDS32_INSN16); 9937 lo_irelfn->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 9938 *insn_len += 2; 9939 } 9940 else 9941 lo_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (lo_irelfn->r_info), 9942 R_NDS32_NONE); 9943 return TRUE; 9944} 9945 9946/* Relax LONGCALL4 relocation for nds32_elf_relax_section. */ 9947 9948static bfd_boolean 9949nds32_elf_relax_longcall4 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 9950 Elf_Internal_Rela *internal_relocs, int *insn_len, 9951 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 9952 Elf_Internal_Shdr *symtab_hdr) 9953{ 9954 /* The pattern for LONGCALL4. Support for function cse. 9955 sethi ta, hi20(symbol) ; LONGCALL4/HI20 9956 ori ta, ta, lo12(symbol) ; LO12S0_ORI/PTR 9957 jral ta ; PTR_RES/EMPTY/INSN16 */ 9958 9959 bfd_vma laddr; 9960 uint32_t insn; 9961 Elf_Internal_Rela *hi_irel, *ptr_irel, *insn_irel, *em_irel, *call_irel; 9962 Elf_Internal_Rela *irelend; 9963 int pic_ext_target = 0; 9964 bfd_signed_vma foff; 9965 9966 irelend = internal_relocs + sec->reloc_count; 9967 laddr = irel->r_offset; 9968 9969 /* Get the reloc for the address from which the register is 9970 being loaded. This reloc will tell us which function is 9971 actually being called. */ 9972 hi_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 9973 R_NDS32_HI20_RELA, laddr); 9974 9975 if (hi_irel == irelend) 9976 { 9977 (*_bfd_error_handler) 9978 ("%B: warning: R_NDS32_LONGCALL4 points to unrecognized" 9979 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 9980 return FALSE; 9981 } 9982 9983 /* Get the value of the symbol referred to by the reloc. */ 9984 foff = calculate_offset (abfd, sec, hi_irel, isymbuf, symtab_hdr, 9985 &pic_ext_target); 9986 9987 /* This condition only happened when symbol is undefined. */ 9988 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 9989 || foff >= CONSERVATIVE_24BIT_S1) 9990 return FALSE; 9991 9992 /* Relax to: jal symbol; 25_PCREL */ 9993 /* For simplicity of coding, we are going to modify the section 9994 contents, the section relocs, and the BFD symbol table. We 9995 must tell the rest of the code not to free up this 9996 information. It would be possible to instead create a table 9997 of changes which have to be made, as is done in coff-mips.c; 9998 that would be more work, but would require less memory when 9999 the linker is run. */ 10000 10001 ptr_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10002 R_NDS32_PTR_RESOLVED, irel->r_addend); 10003 em_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10004 R_NDS32_EMPTY, irel->r_addend); 10005 10006 if (ptr_irel == irelend || em_irel == irelend) 10007 { 10008 (*_bfd_error_handler) 10009 ("%B: warning: R_NDS32_LONGCALL4 points to unrecognized" 10010 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10011 return FALSE; 10012 } 10013 /* Check these is enough space to insert jal in R_NDS32_EMPTY. */ 10014 insn = bfd_getb32 (contents + irel->r_addend); 10015 if (insn & 0x80000000) 10016 return FALSE; 10017 10018 /* Replace the long call with a jal. */ 10019 em_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (em_irel->r_info), 10020 R_NDS32_25_PCREL_RELA); 10021 ptr_irel->r_addend = 1; 10022 10023 /* We don't resolve this here but resolve it in relocate_section. */ 10024 insn = INSN_JAL; 10025 bfd_putb32 (insn, contents + em_irel->r_offset); 10026 10027 irel->r_info = 10028 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10029 10030 /* If there is function cse, HI20 can not remove now. */ 10031 call_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10032 R_NDS32_LONGCALL4, laddr); 10033 if (call_irel == irelend) 10034 { 10035 *insn_len = 0; 10036 hi_irel->r_info = 10037 ELF32_R_INFO (ELF32_R_SYM (hi_irel->r_info), R_NDS32_NONE); 10038 } 10039 10040 insn_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10041 R_NDS32_INSN16, irel->r_addend); 10042 if (insn_irel != irelend) 10043 insn_irel->r_info = 10044 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10045 10046 return TRUE; 10047} 10048 10049/* Relax LONGCALL5 relocation for nds32_elf_relax_section. */ 10050 10051static bfd_boolean 10052nds32_elf_relax_longcall5 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10053 Elf_Internal_Rela *internal_relocs, int *insn_len, 10054 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 10055 Elf_Internal_Shdr *symtab_hdr) 10056{ 10057 /* The pattern for LONGCALL5. 10058 bltz rt, .L1 ; LONGCALL5/17_PCREL 10059 jal symbol ; 25_PCREL 10060 .L1: */ 10061 10062 bfd_vma laddr; 10063 uint32_t insn; 10064 Elf_Internal_Rela *cond_irel, *irelend; 10065 int pic_ext_target = 0; 10066 bfd_signed_vma foff; 10067 10068 irelend = internal_relocs + sec->reloc_count; 10069 laddr = irel->r_offset; 10070 insn = bfd_getb32 (contents + laddr); 10071 10072 /* Get the reloc for the address from which the register is 10073 being loaded. This reloc will tell us which function is 10074 actually being called. */ 10075 cond_irel = 10076 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10077 R_NDS32_25_PCREL_RELA, irel->r_addend); 10078 if (cond_irel == irelend) 10079 { 10080 (*_bfd_error_handler) 10081 ("%B: warning: R_NDS32_LONGCALL5 points to unrecognized" 10082 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10083 return FALSE; 10084 } 10085 10086 /* Get the value of the symbol referred to by the reloc. */ 10087 foff = calculate_offset (abfd, sec, cond_irel, isymbuf, symtab_hdr, 10088 &pic_ext_target); 10089 10090 if (foff == 0 || foff < -CONSERVATIVE_16BIT_S1 10091 || foff >= CONSERVATIVE_16BIT_S1) 10092 return FALSE; 10093 10094 /* Relax to bgezal rt, label ; 17_PCREL 10095 or bltzal rt, label ; 17_PCREL */ 10096 10097 /* Convert to complimentary conditional call. */ 10098 insn = CONVERT_CONDITION_CALL (insn); 10099 10100 /* For simplicity of coding, we are going to modify the section 10101 contents, the section relocs, and the BFD symbol table. We 10102 must tell the rest of the code not to free up this 10103 information. It would be possible to instead create a table 10104 of changes which have to be made, as is done in coff-mips.c; 10105 that would be more work, but would require less memory when 10106 the linker is run. */ 10107 10108 /* Modify relocation and contents. */ 10109 cond_irel->r_info = 10110 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_17_PCREL_RELA); 10111 10112 /* Replace the long call with a bgezal. */ 10113 bfd_putb32 (insn, contents + cond_irel->r_offset); 10114 *insn_len = 0; 10115 10116 /* Clean unnessary relocations. */ 10117 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10118 10119 cond_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10120 R_NDS32_17_PCREL_RELA, laddr); 10121 cond_irel->r_info = 10122 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_NONE); 10123 10124 return TRUE; 10125} 10126 10127/* Relax LONGCALL6 relocation for nds32_elf_relax_section. */ 10128 10129static bfd_boolean 10130nds32_elf_relax_longcall6 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10131 Elf_Internal_Rela *internal_relocs, int *insn_len, 10132 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 10133 Elf_Internal_Shdr *symtab_hdr) 10134{ 10135 /* The pattern for LONGCALL6. 10136 bltz rt, .L1 ; LONGCALL6/17_PCREL 10137 sethi ta, hi20(symbol) ; HI20/PTR 10138 ori ta, ta, lo12(symbol) ; LO12S0_ORI/PTR 10139 jral ta ; PTR_RES/EMPTY/INSN16 10140 .L1 */ 10141 10142 bfd_vma laddr; 10143 uint32_t insn; 10144 Elf_Internal_Rela *em_irel, *cond_irel, *irelend; 10145 int pic_ext_target = 0; 10146 bfd_signed_vma foff; 10147 10148 irelend = internal_relocs + sec->reloc_count; 10149 laddr = irel->r_offset; 10150 10151 /* Get the reloc for the address from which the register is 10152 being loaded. This reloc will tell us which function is 10153 actually being called. */ 10154 em_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10155 R_NDS32_EMPTY, irel->r_addend); 10156 10157 if (em_irel == irelend) 10158 { 10159 (*_bfd_error_handler) 10160 ("%B: warning: R_NDS32_LONGCALL6 points to unrecognized" 10161 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10162 return FALSE; 10163 } 10164 10165 /* Get the value of the symbol referred to by the reloc. */ 10166 foff = calculate_offset (abfd, sec, em_irel, isymbuf, symtab_hdr, 10167 &pic_ext_target); 10168 10169 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 10170 || foff >= CONSERVATIVE_24BIT_S1) 10171 return FALSE; 10172 10173 /* Check these is enough space to insert jal in R_NDS32_EMPTY. */ 10174 insn = bfd_getb32 (contents + irel->r_addend); 10175 if (insn & 0x80000000) 10176 return FALSE; 10177 10178 insn = bfd_getb32 (contents + laddr); 10179 if (foff >= -CONSERVATIVE_16BIT_S1 && foff < CONSERVATIVE_16BIT_S1) 10180 { 10181 /* Relax to bgezal rt, label ; 17_PCREL 10182 or bltzal rt, label ; 17_PCREL */ 10183 10184 /* Convert to complimentary conditional call. */ 10185 *insn_len = 0; 10186 insn = CONVERT_CONDITION_CALL (insn); 10187 bfd_putb32 (insn, contents + em_irel->r_offset); 10188 10189 em_irel->r_info = 10190 ELF32_R_INFO (ELF32_R_SYM (em_irel->r_info), R_NDS32_17_PCREL_RELA); 10191 10192 /* Set resolved relocation. */ 10193 cond_irel = 10194 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10195 R_NDS32_PTR_RESOLVED, irel->r_addend); 10196 if (cond_irel == irelend) 10197 { 10198 (*_bfd_error_handler) 10199 ("%B: warning: R_NDS32_LONGCALL6 points to unrecognized" 10200 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10201 return FALSE; 10202 } 10203 cond_irel->r_addend = 1; 10204 10205 /* Clear relocations. */ 10206 10207 irel->r_info = 10208 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10209 10210 cond_irel = 10211 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10212 R_NDS32_17_PCREL_RELA, laddr); 10213 if (cond_irel != irelend) 10214 cond_irel->r_info = 10215 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_NONE); 10216 10217 cond_irel = 10218 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10219 R_NDS32_INSN16, irel->r_addend); 10220 if (cond_irel != irelend) 10221 cond_irel->r_info = 10222 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_NONE); 10223 10224 } 10225 else if (foff >= -CONSERVATIVE_24BIT_S1 && foff < CONSERVATIVE_24BIT_S1) 10226 { 10227 /* Relax to the following instruction sequence 10228 bltz rt, .L1 ; LONGCALL2/17_PCREL 10229 jal symbol ; 25_PCREL/PTR_RES 10230 .L1 */ 10231 *insn_len = 4; 10232 /* Convert instruction. */ 10233 insn = INSN_JAL; 10234 bfd_putb32 (insn, contents + em_irel->r_offset); 10235 10236 /* Convert relocations. */ 10237 em_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (em_irel->r_info), 10238 R_NDS32_25_PCREL_RELA); 10239 irel->r_info = 10240 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_LONGCALL5); 10241 10242 /* Set resolved relocation. */ 10243 cond_irel = 10244 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10245 R_NDS32_PTR_RESOLVED, irel->r_addend); 10246 if (cond_irel == irelend) 10247 { 10248 (*_bfd_error_handler) 10249 ("%B: warning: R_NDS32_LONGCALL6 points to unrecognized" 10250 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10251 return FALSE; 10252 } 10253 cond_irel->r_addend = 1; 10254 10255 cond_irel = 10256 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10257 R_NDS32_INSN16, irel->r_addend); 10258 if (cond_irel != irelend) 10259 cond_irel->r_info = 10260 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_NONE); 10261 } 10262 return TRUE; 10263} 10264 10265/* Relax LONGJUMP4 relocation for nds32_elf_relax_section. */ 10266 10267static bfd_boolean 10268nds32_elf_relax_longjump4 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10269 Elf_Internal_Rela *internal_relocs, int *insn_len, 10270 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 10271 Elf_Internal_Shdr *symtab_hdr) 10272{ 10273 /* The pattern for LONGJUMP4. 10274 sethi ta, hi20(symbol) ; LONGJUMP4/HI20 10275 ori ta, ta, lo12(symbol) ; LO12S0_ORI/PTR 10276 jr ta ; PTR_RES/INSN16/EMPTY */ 10277 10278 bfd_vma laddr; 10279 int seq_len; /* Original length of instruction sequence. */ 10280 uint32_t insn; 10281 Elf_Internal_Rela *hi_irel, *ptr_irel, *em_irel, *call_irel, *irelend; 10282 int pic_ext_target = 0; 10283 bfd_signed_vma foff; 10284 10285 irelend = internal_relocs + sec->reloc_count; 10286 seq_len = GET_SEQ_LEN (irel->r_addend); 10287 laddr = irel->r_offset; 10288 *insn_len = seq_len; 10289 10290 /* Get the reloc for the address from which the register is 10291 being loaded. This reloc will tell us which function is 10292 actually being called. */ 10293 10294 hi_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10295 R_NDS32_HI20_RELA, laddr); 10296 10297 if (hi_irel == irelend) 10298 { 10299 (*_bfd_error_handler) 10300 ("%B: warning: R_NDS32_LONGJUMP4 points to unrecognized" 10301 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10302 return FALSE; 10303 } 10304 10305 /* Get the value of the symbol referred to by the reloc. */ 10306 foff = calculate_offset (abfd, sec, hi_irel, isymbuf, symtab_hdr, 10307 &pic_ext_target); 10308 10309 if (pic_ext_target || foff == 0 || foff >= CONSERVATIVE_24BIT_S1 10310 || foff < -CONSERVATIVE_24BIT_S1) 10311 return FALSE; 10312 10313 /* Convert it to "j label", it may be converted to j8 in the final 10314 pass of relaxation. Therefore, we do not consider this currently. */ 10315 ptr_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10316 R_NDS32_PTR_RESOLVED, irel->r_addend); 10317 em_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10318 R_NDS32_EMPTY, irel->r_addend); 10319 10320 if (ptr_irel == irelend || em_irel == irelend) 10321 { 10322 (*_bfd_error_handler) 10323 ("%B: warning: R_NDS32_LONGJUMP4 points to unrecognized" 10324 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10325 return FALSE; 10326 } 10327 10328 em_irel->r_info = 10329 ELF32_R_INFO (ELF32_R_SYM (em_irel->r_info), R_NDS32_25_PCREL_RELA); 10330 ptr_irel->r_addend = 1; 10331 10332 /* Write instruction. */ 10333 insn = INSN_J; 10334 bfd_putb32 (insn, contents + em_irel->r_offset); 10335 10336 /* Clear relocations. */ 10337 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10338 10339 /* If there is function cse, HI20 can not remove now. */ 10340 call_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10341 R_NDS32_LONGJUMP4, laddr); 10342 if (call_irel == irelend) 10343 { 10344 *insn_len = 0; 10345 hi_irel->r_info = 10346 ELF32_R_INFO (ELF32_R_SYM (hi_irel->r_info), R_NDS32_NONE); 10347 } 10348 10349 return TRUE; 10350} 10351 10352/* Relax LONGJUMP5 relocation for nds32_elf_relax_section. */ 10353 10354static bfd_boolean 10355nds32_elf_relax_longjump5 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10356 Elf_Internal_Rela *internal_relocs, int *insn_len, 10357 int *seq_len, bfd_byte *contents, 10358 Elf_Internal_Sym *isymbuf, 10359 Elf_Internal_Shdr *symtab_hdr) 10360{ 10361 /* There are 2 variations for LONGJUMP5 10362 case 2-4; 1st insn convertible, 16-bit on. 10363 bnes38 rt, ra, .L1 ; LONGJUMP5/9_PCREL/INSN16 10364 j label ; 25_PCREL/INSN16 10365 $1: 10366 10367 case 4-4; 1st insn not convertible 10368 bne rt, ra, .L1 ; LONGJUMP5/15_PCREL/INSN16 10369 j label ; 25_PCREL/INSN16 10370 .L1: */ 10371 10372 bfd_vma laddr; 10373 Elf_Internal_Rela *cond_irel, *irelend; 10374 int pic_ext_target = 0; 10375 unsigned int i; 10376 bfd_signed_vma foff; 10377 uint32_t insn, re_insn = 0; 10378 uint16_t insn16, re_insn16 = 0; 10379 unsigned long reloc; 10380 10381 enum elf_nds32_reloc_type checked_types[] = 10382 { R_NDS32_17_PCREL_RELA, R_NDS32_15_PCREL_RELA, 10383 R_NDS32_9_PCREL_RELA, R_NDS32_INSN16 }; 10384 10385 irelend = internal_relocs + sec->reloc_count; 10386 laddr = irel->r_offset; 10387 10388 /* Get the reloc for the address from which the register is 10389 being loaded. This reloc will tell us which function is 10390 actually being called. */ 10391 10392 cond_irel = 10393 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10394 R_NDS32_25_PCREL_RELA, irel->r_addend); 10395 if (cond_irel == irelend) 10396 { 10397 (*_bfd_error_handler) 10398 ("%B: warning: R_NDS32_LONGJUMP5 points to unrecognized" 10399 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10400 return FALSE; 10401 } 10402 10403 /* Get the value of the symbol referred to by the reloc. */ 10404 foff = calculate_offset (abfd, sec, cond_irel, isymbuf, symtab_hdr, 10405 &pic_ext_target); 10406 10407 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_16BIT_S1 10408 || foff >= CONSERVATIVE_16BIT_S1) 10409 return FALSE; 10410 10411 /* Get the all corresponding instructions. */ 10412 insn = bfd_getb32 (contents + laddr); 10413 /* Check instruction size. */ 10414 if (insn & 0x80000000) 10415 { 10416 *seq_len = 0; 10417 insn16 = insn >> 16; 10418 nds32_elf_convert_branch (insn16, 0, &re_insn16, &re_insn); 10419 } 10420 else 10421 nds32_elf_convert_branch (0, insn, &re_insn16, &re_insn); 10422 10423 if (N32_OP6 (re_insn) == N32_OP6_BR1 10424 && (foff >= -CONSERVATIVE_14BIT_S1 && foff < CONSERVATIVE_14BIT_S1)) 10425 { 10426 /* beqs label ; 15_PCREL. */ 10427 bfd_putb32 (re_insn, contents + cond_irel->r_offset); 10428 reloc = R_NDS32_15_PCREL_RELA; 10429 } 10430 else if (N32_OP6 (re_insn) == N32_OP6_BR2 10431 && foff >= -CONSERVATIVE_16BIT_S1 && foff < CONSERVATIVE_16BIT_S1) 10432 { 10433 /* beqz label ; 17_PCREL. */ 10434 bfd_putb32 (re_insn, contents + cond_irel->r_offset); 10435 reloc = R_NDS32_17_PCREL_RELA; 10436 } 10437 else if ( N32_OP6 (re_insn) == N32_OP6_BR3 10438 && foff >= -CONSERVATIVE_8BIT_S1 && foff < CONSERVATIVE_8BIT_S1) 10439 { 10440 /* beqc label ; 9_PCREL. */ 10441 bfd_putb32 (re_insn, contents + cond_irel->r_offset); 10442 reloc = R_NDS32_WORD_9_PCREL_RELA; 10443 } 10444 else 10445 return FALSE; 10446 10447 /* Set all relocations. */ 10448 cond_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), reloc); 10449 10450 /* Clean relocations. */ 10451 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10452 for (i = 0; i < sizeof (checked_types) / sizeof (checked_types[0]); i++) 10453 { 10454 cond_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10455 checked_types[i], laddr); 10456 if (cond_irel != irelend) 10457 { 10458 if (*seq_len == 0 10459 && (ELF32_R_TYPE (cond_irel->r_info) == R_NDS32_INSN16)) 10460 { 10461 /* If the branch instruction is 2 byte, it cannot remove 10462 directly. Only convert it to nop16 and remove it after 10463 checking alignment issue. */ 10464 insn16 = NDS32_NOP16; 10465 bfd_putb16 (insn16, contents + laddr); 10466 cond_irel->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 10467 } 10468 else 10469 cond_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), 10470 R_NDS32_NONE); 10471 } 10472 } 10473 *insn_len = 0; 10474 10475 return TRUE; 10476} 10477 10478/* Relax LONGJUMP6 relocation for nds32_elf_relax_section. */ 10479 10480static bfd_boolean 10481nds32_elf_relax_longjump6 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10482 Elf_Internal_Rela *internal_relocs, int *insn_len, 10483 int *seq_len, bfd_byte *contents, 10484 Elf_Internal_Sym *isymbuf, 10485 Elf_Internal_Shdr *symtab_hdr) 10486{ 10487 /* There are 5 variations for LONGJUMP6 10488 case : 2-4-4-4; 1st insn convertible, 16-bit on. 10489 bnes38 rt, ra, .L1 ; LONGJUMP6/15_PCREL/INSN16 10490 sethi ta, hi20(symbol) ; HI20/PTR 10491 ori ta, ta, lo12(symbol) ; LO12S0_ORI/PTR 10492 jr ta ; PTR_RES/INSN16/EMPTY 10493 .L1: 10494 10495 case : 4-4-4-4; 1st insn not convertible, 16-bit on. 10496 bne rt, ra, .L1 ; LONGJUMP6/15_PCREL/INSN16 10497 sethi ta, hi20(symbol) ; HI20/PTR 10498 ori ta, ta, lo12(symbol) ; LO12S0_ORI/PTR 10499 jr ta ; PTR_RES/INSN16/EMPTY 10500 .L1: */ 10501 10502 enum elf_nds32_reloc_type checked_types[] = 10503 { R_NDS32_17_PCREL_RELA, R_NDS32_15_PCREL_RELA, 10504 R_NDS32_9_PCREL_RELA, R_NDS32_INSN16 }; 10505 10506 int reloc_off = 0, cond_removed = 0; 10507 bfd_vma laddr; 10508 Elf_Internal_Rela *cond_irel, *em_irel, *irelend, *insn_irel; 10509 int pic_ext_target = 0; 10510 unsigned int i; 10511 bfd_signed_vma foff; 10512 uint32_t insn, re_insn = 0; 10513 uint16_t insn16, re_insn16 = 0; 10514 unsigned long reloc; 10515 10516 irelend = internal_relocs + sec->reloc_count; 10517 laddr = irel->r_offset; 10518 10519 /* Get the reloc for the address from which the register is 10520 being loaded. This reloc will tell us which function is 10521 actually being called. */ 10522 em_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10523 R_NDS32_EMPTY, irel->r_addend); 10524 10525 if (em_irel == irelend) 10526 { 10527 (*_bfd_error_handler) 10528 ("%B: warning: R_NDS32_LONGJUMP6 points to unrecognized" 10529 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10530 return FALSE; 10531 } 10532 10533 /* Get the value of the symbol referred to by the reloc. */ 10534 foff = calculate_offset (abfd, sec, em_irel, isymbuf, symtab_hdr, 10535 &pic_ext_target); 10536 10537 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_24BIT_S1 10538 || foff >= CONSERVATIVE_24BIT_S1) 10539 return FALSE; 10540 10541 insn = bfd_getb32 (contents + laddr); 10542 /* Check instruction size. */ 10543 if (insn & 0x80000000) 10544 { 10545 *seq_len = 0; 10546 insn16 = insn >> 16; 10547 nds32_elf_convert_branch (insn16, 0, &re_insn16, &re_insn); 10548 } 10549 else 10550 nds32_elf_convert_branch (0, insn, &re_insn16, &re_insn); 10551 10552 /* For simplicity of coding, we are going to modify the section 10553 contents, the section relocs, and the BFD symbol table. We 10554 must tell the rest of the code not to free up this 10555 information. It would be possible to instead create a table 10556 of changes which have to be made, as is done in coff-mips.c; 10557 that would be more work, but would require less memory when 10558 the linker is run. */ 10559 10560 if (N32_OP6 (re_insn) == N32_OP6_BR1 10561 && (foff >= -CONSERVATIVE_14BIT_S1 && foff < CONSERVATIVE_14BIT_S1)) 10562 { 10563 /* beqs label ; 15_PCREL */ 10564 bfd_putb32 (re_insn, contents + em_irel->r_offset); 10565 reloc = R_NDS32_15_PCREL_RELA; 10566 cond_removed = 1; 10567 } 10568 else if (N32_OP6 (re_insn) == N32_OP6_BR2 10569 && foff >= -CONSERVATIVE_16BIT_S1 && foff < CONSERVATIVE_16BIT_S1) 10570 { 10571 /* beqz label ; 17_PCREL */ 10572 bfd_putb32 (re_insn, contents + em_irel->r_offset); 10573 reloc = R_NDS32_17_PCREL_RELA; 10574 cond_removed = 1; 10575 } 10576 else if (foff >= -CONSERVATIVE_24BIT_S1 - reloc_off 10577 && foff < CONSERVATIVE_24BIT_S1 - reloc_off) 10578 { 10579 /* Relax to one of the following 2 variations 10580 10581 case 2-4; 1st insn convertible, 16-bit on. 10582 bnes38 rt, ra, .L1 ; LONGJUMP5/9_PCREL/INSN16 10583 j label ; 25_PCREL/INSN16 10584 $1: 10585 10586 case 4-4; 1st insn not convertible 10587 bne rt, ra, .L1 ; LONGJUMP5/15_PCREL/INSN16 10588 j label ; 25_PCREL/INSN16 10589 .L1: */ 10590 10591 /* Use j label as second instruction. */ 10592 insn = INSN_J; 10593 reloc = R_NDS32_25_PCREL_RELA; 10594 bfd_putb32 (insn, contents + em_irel->r_offset); 10595 } 10596 else 10597 return FALSE; 10598 10599 /* Set all relocations. */ 10600 em_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (em_irel->r_info), reloc); 10601 10602 cond_irel = 10603 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10604 R_NDS32_PTR_RESOLVED, em_irel->r_offset); 10605 cond_irel->r_addend = 1; 10606 10607 /* Use INSN16 of first branch instruction to distinguish if keeping 10608 INSN16 of final instruction or not. */ 10609 insn_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10610 R_NDS32_INSN16, irel->r_offset); 10611 if (insn_irel == irelend) 10612 { 10613 /* Clean the final INSN16. */ 10614 insn_irel = 10615 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10616 R_NDS32_INSN16, em_irel->r_offset); 10617 insn_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), 10618 R_NDS32_NONE); 10619 } 10620 10621 if (cond_removed == 1) 10622 { 10623 *insn_len = 0; 10624 10625 /* Clear relocations. */ 10626 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10627 10628 for (i = 0; i < sizeof (checked_types) / sizeof (checked_types[0]); i++) 10629 { 10630 cond_irel = 10631 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10632 checked_types[i], laddr); 10633 if (cond_irel != irelend) 10634 { 10635 if (*seq_len == 0 10636 && (ELF32_R_TYPE (cond_irel->r_info) == R_NDS32_INSN16)) 10637 { 10638 /* If the branch instruction is 2 byte, it cannot remove 10639 directly. Only convert it to nop16 and remove it after 10640 checking alignment issue. */ 10641 insn16 = NDS32_NOP16; 10642 bfd_putb16 (insn16, contents + laddr); 10643 cond_irel->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 10644 } 10645 else 10646 cond_irel->r_info = 10647 ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), R_NDS32_NONE); 10648 } 10649 } 10650 } 10651 else 10652 { 10653 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 10654 R_NDS32_LONGJUMP5); 10655 } 10656 10657 return TRUE; 10658} 10659 10660/* Relax LONGJUMP7 relocation for nds32_elf_relax_section. */ 10661 10662static bfd_boolean 10663nds32_elf_relax_longjump7 (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 10664 Elf_Internal_Rela *internal_relocs, int *insn_len, 10665 int *seq_len, bfd_byte *contents, 10666 Elf_Internal_Sym *isymbuf, 10667 Elf_Internal_Shdr *symtab_hdr) 10668{ 10669 /* There are 2 variations for LONGJUMP5 10670 case 2-4; 1st insn convertible, 16-bit on. 10671 movi55 ta, imm11 ; LONGJUMP7/INSN16 10672 beq rt, ta, label ; 15_PCREL 10673 10674 case 4-4; 1st insn not convertible 10675 movi55 ta, imm11 ; LONGJUMP7/INSN16 10676 beq rt, ta, label ; 15_PCREL */ 10677 10678 bfd_vma laddr; 10679 Elf_Internal_Rela *cond_irel, *irelend, *insn_irel; 10680 int pic_ext_target = 0; 10681 bfd_signed_vma foff; 10682 uint32_t insn, re_insn = 0; 10683 uint16_t insn16; 10684 uint32_t imm11; 10685 10686 irelend = internal_relocs + sec->reloc_count; 10687 laddr = irel->r_offset; 10688 10689 /* Get the reloc for the address from which the register is 10690 being loaded. This reloc will tell us which function is 10691 actually being called. */ 10692 10693 cond_irel = 10694 find_relocs_at_address_addr (irel, internal_relocs, irelend, 10695 R_NDS32_15_PCREL_RELA, irel->r_addend); 10696 if (cond_irel == irelend) 10697 { 10698 (*_bfd_error_handler) 10699 ("%B: warning: R_NDS32_LONGJUMP7 points to unrecognized" 10700 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10701 return FALSE; 10702 } 10703 10704 /* Get the value of the symbol referred to by the reloc. */ 10705 foff = calculate_offset (abfd, sec, cond_irel, isymbuf, symtab_hdr, 10706 &pic_ext_target); 10707 10708 if (pic_ext_target || foff == 0 || foff < -CONSERVATIVE_8BIT_S1 10709 || foff >= CONSERVATIVE_8BIT_S1) 10710 return FALSE; 10711 10712 /* Get the first instruction for its size. */ 10713 insn = bfd_getb32 (contents + laddr); 10714 if (insn & 0x80000000) 10715 { 10716 *seq_len = 0; 10717 /* Get the immediate from movi55. */ 10718 imm11 = N16_IMM5S (insn >> 16); 10719 } 10720 else 10721 { 10722 /* Get the immediate from movi. */ 10723 imm11 = N32_IMM20S (insn); 10724 } 10725 10726 /* Get the branch instruction. */ 10727 insn = bfd_getb32 (contents + irel->r_addend); 10728 /* Convert instruction to BR3. */ 10729 if ((insn >> 14) & 0x1) 10730 re_insn = N32_BR3 (BNEC, N32_RT5 (insn), imm11, 0); 10731 else 10732 re_insn = N32_BR3 (BEQC, N32_RT5 (insn), imm11, 0); 10733 10734 bfd_putb32 (re_insn, contents + cond_irel->r_offset); 10735 10736 /* Set all relocations. */ 10737 cond_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), 10738 R_NDS32_WORD_9_PCREL_RELA); 10739 10740 /* Clean relocations. */ 10741 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10742 insn_irel = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10743 R_NDS32_INSN16, irel->r_offset); 10744 if (insn_irel != irelend) 10745 { 10746 if (*seq_len == 0) 10747 { 10748 /* If the first insntruction is 16bit, convert it to nop16. */ 10749 insn16 = NDS32_NOP16; 10750 bfd_putb16 (insn16, contents + laddr); 10751 insn_irel->r_addend = R_NDS32_INSN16_CONVERT_FLAG; 10752 } 10753 else 10754 cond_irel->r_info = ELF32_R_INFO (ELF32_R_SYM (cond_irel->r_info), 10755 R_NDS32_NONE); 10756 } 10757 *insn_len = 0; 10758 10759 return TRUE; 10760} 10761 10762#define GET_LOADSTORE_RANGE(addend) (((addend) >> 8) & 0x3f) 10763 10764/* Relax LOADSTORE relocation for nds32_elf_relax_section. */ 10765 10766static bfd_boolean 10767nds32_elf_relax_loadstore (struct bfd_link_info *link_info, bfd *abfd, 10768 asection *sec, Elf_Internal_Rela *irel, 10769 Elf_Internal_Rela *internal_relocs, int *insn_len, 10770 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 10771 Elf_Internal_Shdr *symtab_hdr, int load_store_relax) 10772{ 10773 int eliminate_sethi = 0, range_type, i; 10774 bfd_vma local_sda, laddr; 10775 int seq_len; /* Original length of instruction sequence. */ 10776 uint32_t insn; 10777 Elf_Internal_Rela *hi_irelfn = NULL, *irelend; 10778 bfd_vma access_addr = 0; 10779 bfd_vma range_l = 0, range_h = 0; /* Upper/lower bound. */ 10780 enum elf_nds32_reloc_type checked_types[] = 10781 { R_NDS32_HI20_RELA, R_NDS32_GOT_HI20, 10782 R_NDS32_GOTPC_HI20, R_NDS32_GOTOFF_HI20, 10783 R_NDS32_PLTREL_HI20, R_NDS32_PLT_GOTREL_HI20, 10784 R_NDS32_TLS_LE_HI20 10785 }; 10786 10787 irelend = internal_relocs + sec->reloc_count; 10788 seq_len = GET_SEQ_LEN (irel->r_addend); 10789 laddr = irel->r_offset; 10790 *insn_len = seq_len; 10791 10792 /* Get the high part relocation. */ 10793 for (i = 0; (unsigned) i < sizeof (checked_types); i++) 10794 { 10795 hi_irelfn = find_relocs_at_address_addr (irel, internal_relocs, irelend, 10796 checked_types[i], laddr); 10797 if (hi_irelfn != irelend) 10798 break; 10799 } 10800 10801 if (hi_irelfn == irelend) 10802 { 10803 (*_bfd_error_handler) 10804 ("%B: warning: R_NDS32_LOADSTORE points to unrecognized" 10805 "reloc at 0x%lx.", abfd, (long) irel->r_offset); 10806 return FALSE; 10807 } 10808 10809 range_type = GET_LOADSTORE_RANGE (irel->r_addend); 10810 nds32_elf_final_sda_base (sec->output_section->owner, 10811 link_info, &local_sda, FALSE); 10812 10813 switch (ELF32_R_TYPE (hi_irelfn->r_info)) 10814 { 10815 case R_NDS32_HI20_RELA: 10816 insn = bfd_getb32 (contents + laddr); 10817 access_addr = 10818 calculate_memory_address (abfd, hi_irelfn, isymbuf, symtab_hdr); 10819 10820 if (range_type == NDS32_LOADSTORE_IMM) 10821 { 10822 struct elf_link_hash_entry *h = NULL; 10823 int indx; 10824 10825 if (ELF32_R_SYM (hi_irelfn->r_info) >= symtab_hdr->sh_info) 10826 { 10827 indx = ELF32_R_SYM (hi_irelfn->r_info) - symtab_hdr->sh_info; 10828 h = elf_sym_hashes (abfd)[indx]; 10829 } 10830 10831 if ((access_addr < CONSERVATIVE_20BIT) 10832 && (!h || (h && strcmp (h->root.root.string, FP_BASE_NAME) != 0))) 10833 { 10834 eliminate_sethi = 1; 10835 break; 10836 } 10837 10838 /* This is avoid to relax symbol address which is fixed 10839 relocations. Ex: _stack. */ 10840 if (h && bfd_is_abs_section (h->root.u.def.section)) 10841 return FALSE; 10842 } 10843 10844 if (!load_store_relax) 10845 return FALSE; 10846 10847 /* Case for set gp register. */ 10848 if (N32_RT5 (insn) == REG_GP) 10849 break; 10850 10851 if (range_type == NDS32_LOADSTORE_FLOAT_S 10852 || range_type == NDS32_LOADSTORE_FLOAT_S) 10853 { 10854 range_l = sdata_range[0][0]; 10855 range_h = sdata_range[0][1]; 10856 } 10857 else 10858 { 10859 range_l = sdata_range[1][0]; 10860 range_h = sdata_range[1][1]; 10861 } 10862 break; 10863 10864 case R_NDS32_GOT_HI20: 10865 access_addr = 10866 calculate_got_memory_address (abfd, link_info, hi_irelfn, symtab_hdr); 10867 10868 /* If this symbol is not in .got, the return value will be -1. 10869 Since the gp value is set to SDA_BASE but not GLOBAL_OFFSET_TABLE, 10870 a negative offset is allowed. */ 10871 if ((bfd_signed_vma) (access_addr - local_sda) < CONSERVATIVE_20BIT 10872 && (bfd_signed_vma) (access_addr - local_sda) >= -CONSERVATIVE_20BIT) 10873 eliminate_sethi = 1; 10874 break; 10875 10876 case R_NDS32_PLT_GOTREL_HI20: 10877 access_addr = calculate_plt_memory_address (abfd, link_info, isymbuf, 10878 hi_irelfn, symtab_hdr); 10879 10880 if ((bfd_signed_vma) (access_addr - local_sda) < CONSERVATIVE_20BIT 10881 && (bfd_signed_vma) (access_addr - local_sda) >= -CONSERVATIVE_20BIT) 10882 eliminate_sethi = 1; 10883 break; 10884 10885 case R_NDS32_GOTOFF_HI20: 10886 access_addr = 10887 calculate_memory_address (abfd, hi_irelfn, isymbuf, symtab_hdr); 10888 10889 if ((bfd_signed_vma) (access_addr - local_sda) < CONSERVATIVE_20BIT 10890 && (bfd_signed_vma) (access_addr - local_sda) >= -CONSERVATIVE_20BIT) 10891 eliminate_sethi = 1; 10892 break; 10893 10894 case R_NDS32_GOTPC_HI20: 10895 /* The access_addr must consider r_addend of hi_irel. */ 10896 access_addr = sec->output_section->vma + sec->output_offset 10897 + irel->r_offset + hi_irelfn->r_addend; 10898 10899 if ((bfd_signed_vma) (local_sda - access_addr) < CONSERVATIVE_20BIT 10900 && (bfd_signed_vma) (local_sda - access_addr) >= -CONSERVATIVE_20BIT) 10901 eliminate_sethi = 1; 10902 break; 10903 10904 case R_NDS32_TLS_LE_HI20: 10905 access_addr = 10906 calculate_memory_address (abfd, hi_irelfn, isymbuf, symtab_hdr); 10907 BFD_ASSERT (elf_hash_table (link_info)->tls_sec != NULL); 10908 access_addr -= (elf_hash_table (link_info)->tls_sec->vma + TP_OFFSET); 10909 if ((range_type == NDS32_LOADSTORE_IMM) 10910 && (bfd_signed_vma) (access_addr) < CONSERVATIVE_20BIT 10911 && (bfd_signed_vma) (access_addr) >= -CONSERVATIVE_20BIT) 10912 eliminate_sethi = 1; 10913 break; 10914 10915 default: 10916 return FALSE; 10917 } 10918 10919 /* Delete sethi instruction. */ 10920 if (eliminate_sethi == 1 10921 || (local_sda <= access_addr && (access_addr - local_sda) < range_h) 10922 || (local_sda > access_addr && (local_sda - access_addr) <= range_l)) 10923 { 10924 hi_irelfn->r_info = 10925 ELF32_R_INFO (ELF32_R_SYM (hi_irelfn->r_info), R_NDS32_NONE); 10926 irel->r_info = 10927 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 10928 *insn_len = 0; 10929 } 10930 return TRUE; 10931} 10932 10933/* Relax LO12 relocation for nds32_elf_relax_section. */ 10934 10935static void 10936nds32_elf_relax_lo12 (struct bfd_link_info *link_info, bfd *abfd, 10937 asection *sec, Elf_Internal_Rela *irel, 10938 Elf_Internal_Rela *internal_relocs, bfd_byte *contents, 10939 Elf_Internal_Sym *isymbuf, Elf_Internal_Shdr *symtab_hdr) 10940{ 10941 uint32_t insn; 10942 bfd_vma local_sda, laddr; 10943 unsigned long reloc; 10944 bfd_vma access_addr; 10945 bfd_vma range_l = 0, range_h = 0; /* Upper/lower bound. */ 10946 Elf_Internal_Rela *irelfn = NULL, *irelend; 10947 struct elf_link_hash_entry *h = NULL; 10948 int indx; 10949 10950 /* For SDA base relative relaxation. */ 10951 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 10952 &local_sda, FALSE); 10953 10954 irelend = internal_relocs + sec->reloc_count; 10955 laddr = irel->r_offset; 10956 insn = bfd_getb32 (contents + laddr); 10957 10958 if (!is_sda_access_insn (insn) && N32_OP6 (insn) != N32_OP6_ORI) 10959 return; 10960 10961 access_addr = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 10962 10963 if (ELF32_R_SYM (irel->r_info) >= symtab_hdr->sh_info) 10964 { 10965 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 10966 h = elf_sym_hashes (abfd)[indx]; 10967 } 10968 10969 if (N32_OP6 (insn) == N32_OP6_ORI && access_addr < CONSERVATIVE_20BIT 10970 && (!h || (h && strcmp (h->root.root.string, FP_BASE_NAME) != 0))) 10971 { 10972 reloc = R_NDS32_20_RELA; 10973 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), reloc); 10974 insn = N32_TYPE1 (MOVI, N32_RT5 (insn), 0); 10975 bfd_putb32 (insn, contents + laddr); 10976 } 10977 /* This is avoid to relax symbol address which is fixed 10978 relocations. Ex: _stack. */ 10979 else if (N32_OP6 (insn) == N32_OP6_ORI 10980 && h && bfd_is_abs_section (h->root.u.def.section)) 10981 return; 10982 else 10983 { 10984 range_l = sdata_range[1][0]; 10985 range_h = sdata_range[1][1]; 10986 switch (ELF32_R_TYPE (irel->r_info)) 10987 { 10988 case R_NDS32_LO12S0_RELA: 10989 reloc = R_NDS32_SDA19S0_RELA; 10990 break; 10991 case R_NDS32_LO12S1_RELA: 10992 reloc = R_NDS32_SDA18S1_RELA; 10993 break; 10994 case R_NDS32_LO12S2_RELA: 10995 reloc = R_NDS32_SDA17S2_RELA; 10996 break; 10997 case R_NDS32_LO12S2_DP_RELA: 10998 range_l = sdata_range[0][0]; 10999 range_h = sdata_range[0][1]; 11000 reloc = R_NDS32_SDA12S2_DP_RELA; 11001 break; 11002 case R_NDS32_LO12S2_SP_RELA: 11003 range_l = sdata_range[0][0]; 11004 range_h = sdata_range[0][1]; 11005 reloc = R_NDS32_SDA12S2_SP_RELA; 11006 break; 11007 default: 11008 return; 11009 } 11010 11011 /* There are range_h and range_l because linker has to promise 11012 all sections move cross one page together. */ 11013 if ((local_sda <= access_addr && (access_addr - local_sda) < range_h) 11014 || (local_sda > access_addr && (local_sda - access_addr) <= range_l)) 11015 { 11016 if (N32_OP6 (insn) == N32_OP6_ORI && N32_RT5 (insn) == REG_GP) 11017 { 11018 /* Maybe we should add R_NDS32_INSN16 reloc type here 11019 or manually do some optimization. sethi can't be 11020 eliminated when updating $gp so the relative ori 11021 needs to be preserved. */ 11022 return; 11023 } 11024 if (!turn_insn_to_sda_access (insn, ELF32_R_TYPE (irel->r_info), 11025 &insn)) 11026 return; 11027 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), reloc); 11028 bfd_putb32 (insn, contents + laddr); 11029 11030 irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11031 R_NDS32_INSN16); 11032 /* SDA17 must keep INSN16 for converting fp_as_gp. */ 11033 if (irelfn != irelend && reloc != R_NDS32_SDA17S2_RELA) 11034 irelfn->r_info = 11035 ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_NDS32_NONE); 11036 11037 } 11038 } 11039 return; 11040} 11041 11042/* Relax low part of PIC instruction pattern. */ 11043 11044static void 11045nds32_elf_relax_piclo12 (struct bfd_link_info *link_info, bfd *abfd, 11046 asection *sec, Elf_Internal_Rela *irel, 11047 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11048 Elf_Internal_Shdr *symtab_hdr) 11049{ 11050 uint32_t insn; 11051 bfd_vma local_sda, laddr; 11052 bfd_signed_vma foff; 11053 unsigned long reloc; 11054 11055 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 11056 &local_sda, FALSE); 11057 laddr = irel->r_offset; 11058 insn = bfd_getb32 (contents + laddr); 11059 11060 if (N32_OP6 (insn) != N32_OP6_ORI) 11061 return; 11062 11063 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_GOT_LO12) 11064 { 11065 foff = calculate_got_memory_address (abfd, link_info, irel, 11066 symtab_hdr) - local_sda; 11067 reloc = R_NDS32_GOT20; 11068 } 11069 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_PLT_GOTREL_LO12) 11070 { 11071 foff = calculate_plt_memory_address (abfd, link_info, isymbuf, irel, 11072 symtab_hdr) - local_sda; 11073 reloc = R_NDS32_PLT_GOTREL_LO20; 11074 } 11075 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_GOTOFF_LO12) 11076 { 11077 foff = calculate_memory_address (abfd, irel, isymbuf, 11078 symtab_hdr) - local_sda; 11079 reloc = R_NDS32_GOTOFF; 11080 } 11081 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_GOTPC_LO12) 11082 { 11083 foff = local_sda - sec->output_section->vma + sec->output_offset 11084 + irel->r_offset + irel->r_addend; 11085 reloc = R_NDS32_GOTPC20; 11086 } 11087 else 11088 return; 11089 11090 if ((foff < CONSERVATIVE_20BIT) && (foff >= -CONSERVATIVE_20BIT)) 11091 { 11092 /* Turn into MOVI. */ 11093 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), reloc); 11094 insn = N32_TYPE1 (MOVI, N32_RT5 (insn), 0); 11095 bfd_putb32 (insn, contents + laddr); 11096 } 11097} 11098 11099/* Relax low part of LE TLS instruction pattern. */ 11100 11101static void 11102nds32_elf_relax_letlslo12 (struct bfd_link_info *link_info, bfd *abfd, 11103 Elf_Internal_Rela *irel, 11104 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11105 Elf_Internal_Shdr *symtab_hdr) 11106{ 11107 uint32_t insn; 11108 bfd_vma laddr; 11109 bfd_signed_vma foff; 11110 unsigned long reloc; 11111 11112 laddr = irel->r_offset; 11113 foff = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 11114 BFD_ASSERT (elf_hash_table (link_info)->tls_sec != NULL); 11115 foff -= (elf_hash_table (link_info)->tls_sec->vma + TP_OFFSET); 11116 insn = bfd_getb32 (contents + laddr); 11117 11118 if ( (bfd_signed_vma) (foff) < CONSERVATIVE_20BIT 11119 && (bfd_signed_vma) (foff) >= -CONSERVATIVE_20BIT) 11120 { 11121 /* Pattern sethi-ori transform to movi. */ 11122 reloc = R_NDS32_TLS_LE_20; 11123 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), reloc); 11124 insn = N32_TYPE1 (MOVI, N32_RT5 (insn), 0); 11125 bfd_putb32 (insn, contents + laddr); 11126 } 11127} 11128 11129/* Relax LE TLS calculate address instruction pattern. */ 11130 11131static void 11132nds32_elf_relax_letlsadd (struct bfd_link_info *link_info, bfd *abfd, 11133 asection *sec, Elf_Internal_Rela *irel, 11134 Elf_Internal_Rela *internal_relocs, 11135 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11136 Elf_Internal_Shdr *symtab_hdr, bfd_boolean *again) 11137{ 11138 /* Local TLS non-pic 11139 sethi ta, hi20(symbol@tpoff) ; TLS_LE_HI20 11140 ori ta, ta, lo12(symbol@tpoff) ; TLS_LE_LO12 11141 add ra, ta, tp ; TLS_LE_ADD */ 11142 11143 uint32_t insn; 11144 bfd_vma laddr; 11145 bfd_signed_vma foff; 11146 Elf_Internal_Rela *i1_irelfn, *irelend; 11147 11148 irelend = internal_relocs + sec->reloc_count; 11149 laddr = irel->r_offset; 11150 insn = bfd_getb32 (contents + laddr); 11151 i1_irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11152 R_NDS32_PTR_RESOLVED); 11153 foff = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 11154 BFD_ASSERT (elf_hash_table (link_info)->tls_sec != NULL); 11155 foff -= (elf_hash_table (link_info)->tls_sec->vma + TP_OFFSET); 11156 11157 /* The range is +/-16k. */ 11158 if ((bfd_signed_vma) (foff) < CONSERVATIVE_15BIT 11159 && (bfd_signed_vma) (foff) >= -CONSERVATIVE_15BIT) 11160 { 11161 /* Transform add to addi. */ 11162 insn = N32_TYPE2 (ADDI, N32_RT5 (insn), N32_RB5 (insn), 0); 11163 irel->r_info = 11164 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_TLS_LE_15S0); 11165 11166 bfd_putb32 (insn, contents + laddr); 11167 if (i1_irelfn != irelend) 11168 { 11169 i1_irelfn->r_addend |= 1; 11170 *again = TRUE; 11171 } 11172 } 11173} 11174 11175/* Relax LE TLS load store instruction pattern. */ 11176 11177static void 11178nds32_elf_relax_letlsls (struct bfd_link_info *link_info, bfd *abfd, 11179 asection *sec, Elf_Internal_Rela *irel, 11180 Elf_Internal_Rela *internal_relocs, 11181 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11182 Elf_Internal_Shdr *symtab_hdr, bfd_boolean *again) 11183{ 11184 11185 uint32_t insn; 11186 bfd_vma laddr; 11187 bfd_signed_vma foff; 11188 Elf_Internal_Rela *i1_irelfn, *irelend; 11189 int success = 0; 11190 11191 irelend = internal_relocs + sec->reloc_count; 11192 laddr = irel->r_offset; 11193 insn = bfd_getb32 (contents + laddr); 11194 i1_irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11195 R_NDS32_PTR_RESOLVED); 11196 foff = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 11197 BFD_ASSERT (elf_hash_table (link_info)->tls_sec != NULL); 11198 foff -= (elf_hash_table (link_info)->tls_sec->vma + TP_OFFSET); 11199 11200 switch ((N32_OP6 (insn) << 8) | (insn & 0xff)) 11201 { 11202 case (N32_OP6_MEM << 8) | N32_MEM_LB: 11203 case (N32_OP6_MEM << 8) | N32_MEM_SB: 11204 case (N32_OP6_MEM << 8) | N32_MEM_LBS: 11205 /* The range is +/-16k. */ 11206 if ((bfd_signed_vma) (foff) < CONSERVATIVE_15BIT 11207 && (bfd_signed_vma) (foff) >= -CONSERVATIVE_15BIT) 11208 { 11209 insn = 11210 ((insn & 0xff) << 25) | (insn & 0x1f00000) | ((insn & 0x7c00) << 5); 11211 irel->r_info = 11212 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_TLS_LE_15S0); 11213 success = 1; 11214 break; 11215 } 11216 case (N32_OP6_MEM << 8) | N32_MEM_LH: 11217 case (N32_OP6_MEM << 8) | N32_MEM_SH: 11218 case (N32_OP6_MEM << 8) | N32_MEM_LHS: 11219 /* The range is +/-32k. */ 11220 if ((bfd_signed_vma) (foff) < CONSERVATIVE_15BIT_S1 11221 && (bfd_signed_vma) (foff) >= -CONSERVATIVE_15BIT_S1) 11222 { 11223 insn = 11224 ((insn & 0xff) << 25) | (insn & 0x1f00000) | ((insn & 0x7c00) << 5); 11225 irel->r_info = 11226 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_TLS_LE_15S1); 11227 success = 1; 11228 break; 11229 } 11230 case (N32_OP6_MEM << 8) | N32_MEM_LW: 11231 case (N32_OP6_MEM << 8) | N32_MEM_SW: 11232 /* The range is +/-64k. */ 11233 if ((bfd_signed_vma) (foff) < CONSERVATIVE_15BIT_S2 11234 && (bfd_signed_vma) (foff) >= -CONSERVATIVE_15BIT_S2) 11235 { 11236 insn = 11237 ((insn & 0xff) << 25) | (insn & 0x1f00000) | ((insn & 0x7c00) << 5); 11238 irel->r_info = 11239 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_TLS_LE_15S2); 11240 success = 1; 11241 break; 11242 } 11243 default: 11244 break; 11245 } 11246 11247 if (success) 11248 { 11249 bfd_putb32 (insn, contents + laddr); 11250 if (i1_irelfn != irelend) 11251 { 11252 i1_irelfn->r_addend |= 1; 11253 *again = TRUE; 11254 } 11255 } 11256} 11257 11258/* Relax PTR relocation for nds32_elf_relax_section. */ 11259 11260static bfd_boolean 11261nds32_elf_relax_ptr (bfd *abfd, asection *sec, Elf_Internal_Rela *irel, 11262 Elf_Internal_Rela *internal_relocs, int *insn_len, 11263 int *seq_len, bfd_byte *contents) 11264{ 11265 Elf_Internal_Rela *ptr_irel, *irelend, *count_irel, *re_irel; 11266 11267 irelend = internal_relocs + sec->reloc_count; 11268 11269 re_irel = 11270 find_relocs_at_address_addr (irel, internal_relocs, irelend, 11271 R_NDS32_PTR_RESOLVED, irel->r_addend); 11272 11273 if (re_irel == irelend) 11274 { 11275 (*_bfd_error_handler) 11276 ("%B: warning: R_NDS32_PTR points to unrecognized reloc at 0x%lx.", 11277 abfd, (long) irel->r_offset); 11278 return FALSE; 11279 } 11280 11281 if (re_irel->r_addend != 1) 11282 return FALSE; 11283 11284 /* Pointed target is relaxed and no longer needs this void *, 11285 change the type to NONE. */ 11286 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 11287 11288 /* Find PTR_COUNT to decide remove it or not. If PTR_COUNT does 11289 not exist, it means only count 1 and remove it directly. */ 11290 /* TODO: I hope we can obsolate R_NDS32_COUNT in the future. */ 11291 count_irel = find_relocs_at_address (irel, internal_relocs, irelend, 11292 R_NDS32_PTR_COUNT); 11293 ptr_irel = find_relocs_at_address (irel, internal_relocs, irelend, 11294 R_NDS32_PTR); 11295 if (count_irel != irelend) 11296 { 11297 if (--count_irel->r_addend > 0) 11298 return FALSE; 11299 } 11300 11301 if (ptr_irel != irelend) 11302 return FALSE; 11303 11304 /* If the PTR_COUNT is already 0, remove current instruction. */ 11305 *seq_len = nds32_elf_insn_size (abfd, contents, irel->r_offset); 11306 *insn_len = 0; 11307 return TRUE; 11308} 11309 11310/* Relax PLT_GOT_SUFF relocation for nds32_elf_relax_section. */ 11311 11312static void 11313nds32_elf_relax_pltgot_suff (struct bfd_link_info *link_info, bfd *abfd, 11314 asection *sec, Elf_Internal_Rela *irel, 11315 Elf_Internal_Rela *internal_relocs, 11316 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11317 Elf_Internal_Shdr *symtab_hdr, bfd_boolean *again) 11318{ 11319 uint32_t insn; 11320 bfd_signed_vma foff; 11321 Elf_Internal_Rela *i1_irelfn, *irelend; 11322 bfd_vma local_sda, laddr; 11323 11324 irelend = internal_relocs + sec->reloc_count; 11325 laddr = irel->r_offset; 11326 insn = bfd_getb32 (contents + laddr); 11327 11328 /* FIXME: It's a little trouble to turn JRAL5 to JAL since 11329 we need additional space. It might be help if we could 11330 borrow some space from instructions to be eliminated 11331 such as sethi, ori, add. */ 11332 if (insn & 0x80000000) 11333 return; 11334 11335 if (nds32_elf_check_dup_relocs 11336 (irel, internal_relocs, irelend, R_NDS32_PLT_GOT_SUFF)) 11337 return; 11338 11339 i1_irelfn = 11340 find_relocs_at_address (irel, internal_relocs, irelend, 11341 R_NDS32_PTR_RESOLVED); 11342 11343 /* FIXIT 090606 11344 The boundary should be reduced since the .plt section hasn't 11345 been created and the address of specific entry is still unknown 11346 Maybe the range between the function call and the begin of the 11347 .text section can be used to decide if the .plt is in the range 11348 of function call. */ 11349 11350 if (N32_OP6 (insn) == N32_OP6_ALU1 11351 && N32_SUB5 (insn) == N32_ALU1_ADD) 11352 { 11353 /* Get the value of the symbol referred to by the reloc. */ 11354 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 11355 &local_sda, FALSE); 11356 foff = (bfd_signed_vma) (calculate_plt_memory_address 11357 (abfd, link_info, isymbuf, irel, 11358 symtab_hdr) - local_sda); 11359 /* This condition only happened when symbol is undefined. */ 11360 if (foff == 0) 11361 return; 11362 11363 if (foff < -CONSERVATIVE_19BIT || foff >= CONSERVATIVE_19BIT) 11364 return; 11365 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 11366 R_NDS32_PLT_GOTREL_LO19); 11367 /* addi.gp */ 11368 insn = N32_TYPE1 (SBGP, N32_RT5 (insn), __BIT (19)); 11369 } 11370 else if (N32_OP6 (insn) == N32_OP6_JREG 11371 && N32_SUB5 (insn) == N32_JREG_JRAL) 11372 { 11373 /* Get the value of the symbol referred to by the reloc. */ 11374 foff = 11375 calculate_plt_offset (abfd, sec, link_info, isymbuf, irel, symtab_hdr); 11376 /* This condition only happened when symbol is undefined. */ 11377 if (foff == 0) 11378 return; 11379 if (foff < -CONSERVATIVE_24BIT_S1 || foff >= CONSERVATIVE_24BIT_S1) 11380 return; 11381 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_25_PLTREL); 11382 insn = INSN_JAL; 11383 } 11384 else 11385 return; 11386 11387 bfd_putb32 (insn, contents + laddr); 11388 if (i1_irelfn != irelend) 11389 { 11390 i1_irelfn->r_addend |= 1; 11391 *again = TRUE; 11392 } 11393} 11394 11395/* Relax GOT_SUFF relocation for nds32_elf_relax_section. */ 11396 11397static void 11398nds32_elf_relax_got_suff (struct bfd_link_info *link_info, bfd *abfd, 11399 asection *sec, Elf_Internal_Rela *irel, 11400 Elf_Internal_Rela *internal_relocs, 11401 bfd_byte *contents, Elf_Internal_Shdr *symtab_hdr, 11402 bfd_boolean *again) 11403{ 11404 uint32_t insn; 11405 bfd_signed_vma foff; 11406 Elf_Internal_Rela *i1_irelfn, *irelend; 11407 bfd_vma local_sda, laddr; 11408 11409 irelend = internal_relocs + sec->reloc_count; 11410 laddr = irel->r_offset; 11411 insn = bfd_getb32 (contents + laddr); 11412 if (insn & 0x80000000) 11413 return; 11414 11415 if (nds32_elf_check_dup_relocs 11416 (irel, internal_relocs, irelend, R_NDS32_GOT_SUFF)) 11417 return; 11418 11419 i1_irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11420 R_NDS32_PTR_RESOLVED); 11421 11422 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 11423 &local_sda, FALSE); 11424 foff = calculate_got_memory_address (abfd, link_info, irel, 11425 symtab_hdr) - local_sda; 11426 11427 if (foff < CONSERVATIVE_19BIT && foff >= -CONSERVATIVE_19BIT) 11428 { 11429 /* Turn LW to LWI.GP. Change relocation type to R_NDS32_GOT_REL. */ 11430 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), __MF (6, 17, 3)); 11431 irel->r_info = 11432 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_GOT17S2_RELA); 11433 bfd_putb32 (insn, contents + laddr); 11434 if (i1_irelfn != irelend) 11435 { 11436 i1_irelfn->r_addend |= 1; 11437 *again = TRUE; 11438 } 11439 } 11440} 11441 11442/* Relax PLT_GOT_SUFF relocation for nds32_elf_relax_section. */ 11443 11444static void 11445nds32_elf_relax_gotoff_suff (struct bfd_link_info *link_info, bfd *abfd, 11446 asection *sec, Elf_Internal_Rela *irel, 11447 Elf_Internal_Rela *internal_relocs, 11448 bfd_byte *contents, Elf_Internal_Sym *isymbuf, 11449 Elf_Internal_Shdr *symtab_hdr, bfd_boolean *again) 11450{ 11451 int opc_insn_gotoff; 11452 uint32_t insn; 11453 bfd_signed_vma foff; 11454 Elf_Internal_Rela *i1_irelfn, *i2_irelfn, *irelend; 11455 bfd_vma local_sda, laddr; 11456 11457 irelend = internal_relocs + sec->reloc_count; 11458 laddr = irel->r_offset; 11459 insn = bfd_getb32 (contents + laddr); 11460 11461 if (insn & 0x80000000) 11462 return; 11463 11464 if (nds32_elf_check_dup_relocs 11465 (irel, internal_relocs, irelend, R_NDS32_GOTOFF_SUFF)) 11466 return; 11467 11468 i1_irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11469 R_NDS32_PTR_RESOLVED); 11470 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 11471 &local_sda, FALSE); 11472 foff = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 11473 foff = foff - local_sda; 11474 11475 if (foff >= CONSERVATIVE_19BIT || foff < -CONSERVATIVE_19BIT) 11476 return; 11477 11478 /* Concatenate opcode and sub-opcode for switch case. 11479 It may be MEM or ALU1. */ 11480 opc_insn_gotoff = (N32_OP6 (insn) << 8) | (insn & 0xff); 11481 switch (opc_insn_gotoff) 11482 { 11483 case (N32_OP6_MEM << 8) | N32_MEM_LW: 11484 /* 4-byte aligned. */ 11485 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), __MF (6, 17, 3)); 11486 irel->r_info = 11487 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA17S2_RELA); 11488 break; 11489 case (N32_OP6_MEM << 8) | N32_MEM_SW: 11490 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), __MF (7, 17, 3)); 11491 irel->r_info = 11492 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA17S2_RELA); 11493 break; 11494 case (N32_OP6_MEM << 8) | N32_MEM_LH: 11495 /* 2-byte aligned. */ 11496 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), 0); 11497 irel->r_info = 11498 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA18S1_RELA); 11499 break; 11500 case (N32_OP6_MEM << 8) | N32_MEM_LHS: 11501 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), __BIT (18)); 11502 irel->r_info = 11503 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA18S1_RELA); 11504 break; 11505 case (N32_OP6_MEM << 8) | N32_MEM_SH: 11506 insn = N32_TYPE1 (HWGP, N32_RT5 (insn), __BIT (19)); 11507 irel->r_info = 11508 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA18S1_RELA); 11509 break; 11510 case (N32_OP6_MEM << 8) | N32_MEM_LB: 11511 /* 1-byte aligned. */ 11512 insn = N32_TYPE1 (LBGP, N32_RT5 (insn), 0); 11513 irel->r_info = 11514 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA19S0_RELA); 11515 break; 11516 case (N32_OP6_MEM << 8) | N32_MEM_LBS: 11517 insn = N32_TYPE1 (LBGP, N32_RT5 (insn), __BIT (19)); 11518 irel->r_info = 11519 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA19S0_RELA); 11520 break; 11521 case (N32_OP6_MEM << 8) | N32_MEM_SB: 11522 insn = N32_TYPE1 (SBGP, N32_RT5 (insn), 0); 11523 irel->r_info = 11524 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA19S0_RELA); 11525 break; 11526 case (N32_OP6_ALU1 << 8) | N32_ALU1_ADD: 11527 insn = N32_TYPE1 (SBGP, N32_RT5 (insn), __BIT (19)); 11528 irel->r_info = 11529 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_SDA19S0_RELA); 11530 break; 11531 default: 11532 return; 11533 } 11534 11535 bfd_putb32 (insn, contents + laddr); 11536 if (i1_irelfn != irelend) 11537 { 11538 i1_irelfn->r_addend |= 1; 11539 *again = TRUE; 11540 } 11541 if ((i2_irelfn = find_relocs_at_address (irel, internal_relocs, irelend, 11542 R_NDS32_INSN16)) != irelend) 11543 i2_irelfn->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 11544 11545} 11546 11547static bfd_boolean 11548nds32_relax_adjust_label (bfd *abfd, asection *sec, 11549 Elf_Internal_Rela *internal_relocs, 11550 bfd_byte *contents, 11551 nds32_elf_blank_t **relax_blank_list, 11552 int optimize, int opt_size) 11553{ 11554 /* This code block is used to adjust 4-byte alignment by relax a pair 11555 of instruction a time. 11556 11557 It recognizes three types of relocations. 11558 1. R_NDS32_LABEL - a aligment. 11559 2. R_NDS32_INSN16 - relax a 32-bit instruction to 16-bit. 11560 3. is_16bit_NOP () - remove a 16-bit instruction. */ 11561 11562 /* TODO: It seems currently implementation only support 4-byte aligment. 11563 We should handle any-aligment. */ 11564 11565 Elf_Internal_Rela *insn_rel = NULL, *label_rel = NULL, *irel; 11566 Elf_Internal_Rela *tmp_rel, *tmp2_rel = NULL; 11567 Elf_Internal_Rela rel_temp; 11568 Elf_Internal_Rela *irelend; 11569 bfd_vma address; 11570 uint16_t insn16; 11571 11572 /* Checking for branch relaxation relies on the relocations to 11573 be sorted on 'r_offset'. This is not guaranteed so we must sort. */ 11574 nds32_insertion_sort (internal_relocs, sec->reloc_count, 11575 sizeof (Elf_Internal_Rela), compar_reloc); 11576 11577 irelend = internal_relocs + sec->reloc_count; 11578 11579 /* Force R_NDS32_LABEL before R_NDS32_INSN16. */ 11580 /* FIXME: Can we generate the right order in assembler? 11581 So we don't have to swapping them here. */ 11582 11583 for (label_rel = internal_relocs, insn_rel = internal_relocs; 11584 label_rel < irelend; label_rel++) 11585 { 11586 if (ELF32_R_TYPE (label_rel->r_info) != R_NDS32_LABEL) 11587 continue; 11588 11589 /* Find the first reloc has the same offset with label_rel. */ 11590 while (insn_rel < irelend && insn_rel->r_offset < label_rel->r_offset) 11591 insn_rel++; 11592 11593 for (;insn_rel < irelend && insn_rel->r_offset == label_rel->r_offset; 11594 insn_rel++) 11595 /* Check if there were R_NDS32_INSN16 and R_NDS32_LABEL at the same 11596 address. */ 11597 if (ELF32_R_TYPE (insn_rel->r_info) == R_NDS32_INSN16) 11598 break; 11599 11600 if (insn_rel < irelend && insn_rel->r_offset == label_rel->r_offset 11601 && insn_rel < label_rel) 11602 { 11603 /* Swap the two reloc if the R_NDS32_INSN16 is 11604 before R_NDS32_LABEL. */ 11605 memcpy (&rel_temp, insn_rel, sizeof (Elf_Internal_Rela)); 11606 memcpy (insn_rel, label_rel, sizeof (Elf_Internal_Rela)); 11607 memcpy (label_rel, &rel_temp, sizeof (Elf_Internal_Rela)); 11608 } 11609 } 11610 11611 label_rel = NULL; 11612 insn_rel = NULL; 11613 /* If there were a sequence of R_NDS32_LABEL end up with .align 2 11614 or higher, remove other R_NDS32_LABEL with lower alignment. 11615 If an R_NDS32_INSN16 in between R_NDS32_LABELs must be converted, 11616 then the R_NDS32_LABEL sequence is broke. */ 11617 for (tmp_rel = internal_relocs; tmp_rel < irelend; tmp_rel++) 11618 { 11619 if (ELF32_R_TYPE (tmp_rel->r_info) == R_NDS32_LABEL) 11620 { 11621 if (label_rel == NULL) 11622 { 11623 if (tmp_rel->r_addend < 2) 11624 label_rel = tmp_rel; 11625 continue; 11626 } 11627 else if (tmp_rel->r_addend > 1) 11628 { 11629 /* Remove all LABEL relocation from label_rel to tmp_rel 11630 including relocations with same offset as tmp_rel. */ 11631 for (tmp2_rel = label_rel; tmp2_rel < tmp_rel 11632 || tmp2_rel->r_offset == tmp_rel->r_offset; tmp2_rel++) 11633 { 11634 if (ELF32_R_TYPE (tmp2_rel->r_info) == R_NDS32_LABEL 11635 && tmp2_rel->r_addend < 2) 11636 tmp2_rel->r_info = 11637 ELF32_R_INFO (ELF32_R_SYM (tmp2_rel->r_info), 11638 R_NDS32_NONE); 11639 } 11640 label_rel = NULL; 11641 } 11642 } 11643 else if (ELF32_R_TYPE (tmp_rel->r_info) == R_NDS32_INSN16 && label_rel) 11644 { 11645 /* A new INSN16 which can be converted, so clear label_rel. */ 11646 if (is_convert_32_to_16 (abfd, sec, tmp_rel, internal_relocs, 11647 irelend, &insn16) 11648 || is_16bit_NOP (abfd, sec, tmp_rel)) 11649 label_rel = NULL; 11650 } 11651 } 11652 11653 label_rel = NULL; 11654 insn_rel = NULL; 11655 /* Optimized for speed and nothing has not been relaxed. 11656 It's time to align labels. 11657 We may convert a 16-bit instruction right before a label to 11658 32-bit, in order to align the label if necessary 11659 all reloc entries has been sorted by r_offset. */ 11660 for (irel = internal_relocs; irel < irelend; irel++) 11661 { 11662 if (ELF32_R_TYPE (irel->r_info) != R_NDS32_INSN16 11663 && ELF32_R_TYPE (irel->r_info) != R_NDS32_LABEL) 11664 continue; 11665 11666 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_INSN16) 11667 { 11668 /* A new INSN16 found, resize the old one. */ 11669 if (is_convert_32_to_16 11670 (abfd, sec, irel, internal_relocs, irelend, &insn16) 11671 || is_16bit_NOP (abfd, sec, irel)) 11672 { 11673 if (insn_rel) 11674 { 11675 /* Previous INSN16 reloc exists, reduce its 11676 size to 16-bit. */ 11677 if (is_convert_32_to_16 (abfd, sec, insn_rel, internal_relocs, 11678 irelend, &insn16)) 11679 { 11680 nds32_elf_write_16 (abfd, contents, insn_rel, 11681 internal_relocs, irelend, insn16); 11682 11683 if (!insert_nds32_elf_blank_recalc_total 11684 (relax_blank_list, insn_rel->r_offset + 2, 2)) 11685 return FALSE; 11686 } 11687 else if (is_16bit_NOP (abfd, sec, insn_rel)) 11688 { 11689 if (!insert_nds32_elf_blank_recalc_total 11690 (relax_blank_list, insn_rel->r_offset, 2)) 11691 return FALSE; 11692 } 11693 insn_rel->r_info = 11694 ELF32_R_INFO (ELF32_R_SYM (insn_rel->r_info), R_NDS32_NONE); 11695 } 11696 /* Save the new one for later use. */ 11697 insn_rel = irel; 11698 } 11699 else 11700 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 11701 R_NDS32_NONE); 11702 } 11703 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL) 11704 { 11705 /* Search for label. */ 11706 int force_relax = 0; 11707 11708 /* Label on 16-bit instruction or optimization 11709 needless, just reset this reloc. */ 11710 insn16 = bfd_getb16 (contents + irel->r_offset); 11711 if ((irel->r_addend & 0x1f) < 2 && (!optimize || (insn16 & 0x8000))) 11712 { 11713 irel->r_info = 11714 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_NDS32_NONE); 11715 continue; 11716 } 11717 11718 address = 11719 irel->r_offset - get_nds32_elf_blank_total (relax_blank_list, 11720 irel->r_offset, 1); 11721 11722 if (!insn_rel) 11723 { 11724 /* Check if there is case which can not be aligned. */ 11725 if (irel->r_addend == 2 && address & 0x2) 11726 return FALSE; 11727 continue; 11728 } 11729 11730 /* Try to align this label. */ 11731 11732 if ((irel->r_addend & 0x1f) < 2) 11733 { 11734 /* Check if there is a INSN16 at the same address. 11735 Label_rel always seats before insn_rel after 11736 our sort. */ 11737 11738 /* Search for INSN16 at LABEL location. If INSN16 is at 11739 same location and this LABEL alignment is lower than 2, 11740 the INSN16 can be converted to 2-byte. */ 11741 for (tmp_rel = irel; 11742 tmp_rel < irelend && tmp_rel->r_offset == irel->r_offset; 11743 tmp_rel++) 11744 { 11745 if (ELF32_R_TYPE (tmp_rel->r_info) == R_NDS32_INSN16 11746 && (is_convert_32_to_16 11747 (abfd, sec, tmp_rel, internal_relocs, 11748 irelend, &insn16) 11749 || is_16bit_NOP (abfd, sec, tmp_rel))) 11750 { 11751 force_relax = 1; 11752 break; 11753 } 11754 } 11755 } 11756 11757 if (force_relax || irel->r_addend == 1 || address & 0x2) 11758 { 11759 /* Label not aligned. */ 11760 /* Previous reloc exists, reduce its size to 16-bit. */ 11761 if (is_convert_32_to_16 (abfd, sec, insn_rel, 11762 internal_relocs, irelend, &insn16)) 11763 { 11764 nds32_elf_write_16 (abfd, contents, insn_rel, 11765 internal_relocs, irelend, insn16); 11766 11767 if (!insert_nds32_elf_blank_recalc_total 11768 (relax_blank_list, insn_rel->r_offset + 2, 2)) 11769 return FALSE; 11770 } 11771 else if (is_16bit_NOP (abfd, sec, insn_rel)) 11772 { 11773 if (!insert_nds32_elf_blank_recalc_total 11774 (relax_blank_list, insn_rel->r_offset, 2)) 11775 return FALSE; 11776 } 11777 11778 } 11779 /* INSN16 reloc is used. */ 11780 insn_rel = NULL; 11781 } 11782 } 11783 11784 address = 11785 sec->size - get_nds32_elf_blank_total (relax_blank_list, sec->size, 0); 11786 if (insn_rel && (address & 0x2 || opt_size)) 11787 { 11788 if (is_convert_32_to_16 (abfd, sec, insn_rel, internal_relocs, 11789 irelend, &insn16)) 11790 { 11791 nds32_elf_write_16 (abfd, contents, insn_rel, internal_relocs, 11792 irelend, insn16); 11793 if (!insert_nds32_elf_blank_recalc_total 11794 (relax_blank_list, insn_rel->r_offset + 2, 2)) 11795 return FALSE; 11796 insn_rel->r_info = ELF32_R_INFO (ELF32_R_SYM (insn_rel->r_info), 11797 R_NDS32_NONE); 11798 } 11799 else if (is_16bit_NOP (abfd, sec, insn_rel)) 11800 { 11801 if (!insert_nds32_elf_blank_recalc_total 11802 (relax_blank_list, insn_rel->r_offset, 2)) 11803 return FALSE; 11804 insn_rel->r_info = ELF32_R_INFO (ELF32_R_SYM (insn_rel->r_info), 11805 R_NDS32_NONE); 11806 } 11807 } 11808 insn_rel = NULL; 11809 return TRUE; 11810} 11811 11812/* Pick relaxation round. */ 11813 11814static int 11815nds32_elf_pick_relax (bfd_boolean init, asection *sec, bfd_boolean *again, 11816 struct elf_nds32_link_hash_table *table, 11817 struct bfd_link_info *link_info) 11818{ 11819 static asection *final_sec; 11820 static bfd_boolean set = FALSE; 11821 static bfd_boolean first = TRUE; 11822 int round_table[] = { 11823 NDS32_RELAX_NORMAL_ROUND, 11824 NDS32_RELAX_JUMP_IFC_ROUND, 11825 NDS32_RELAX_EX9_BUILD_ROUND, 11826 NDS32_RELAX_EX9_REPLACE_ROUND, 11827 }; 11828 static int pass = 0; 11829 static int relax_round; 11830 11831 if (first) 11832 { 11833 /* Run an empty run to get the final section. */ 11834 relax_round = NDS32_RELAX_EMPTY_ROUND; 11835 11836 /* It has to enter relax again because we can 11837 not make sure what the final turn is. */ 11838 *again = TRUE; 11839 first = FALSE; 11840 } 11841 11842 if (!set && *again) 11843 { 11844 /* It is reentered when again is FALSE. */ 11845 final_sec = sec; 11846 return relax_round; 11847 } 11848 11849 /* The second round begins. */ 11850 set = TRUE; 11851 11852 relax_round = round_table[pass]; 11853 11854 if (!init && final_sec == sec) 11855 { 11856 switch (relax_round) 11857 { 11858 case NDS32_RELAX_NORMAL_ROUND: 11859 if (!*again) 11860 { 11861 /* Normal relaxation done. */ 11862 if (table->target_optimize & NDS32_RELAX_JUMP_IFC_ON) 11863 { 11864 pass++; 11865 *again = TRUE; 11866 } 11867 else if (table->target_optimize & NDS32_RELAX_EX9_ON) 11868 { 11869 pass += 2; /* NDS32_RELAX_EX9_BUILD_ROUND */ 11870 *again = TRUE; 11871 } 11872 else if (table->ex9_import_file) 11873 { 11874 /* Import ex9 table. */ 11875 if (table->update_ex9_table) 11876 pass += 2; /* NDS32_RELAX_EX9_BUILD_ROUND */ 11877 else 11878 pass += 3; /* NDS32_RELAX_EX9_REPLACE_ROUND */ 11879 nds32_elf_ex9_import_table (link_info); 11880 *again = TRUE; 11881 } 11882 } 11883 break; 11884 case NDS32_RELAX_JUMP_IFC_ROUND: 11885 if (!nds32_elf_ifc_finish (link_info)) 11886 (*_bfd_error_handler) (_("error: Jump IFC Fail.")); 11887 if (table->target_optimize & NDS32_RELAX_EX9_ON) 11888 { 11889 pass++; 11890 *again = TRUE; 11891 } 11892 break; 11893 case NDS32_RELAX_EX9_BUILD_ROUND: 11894 nds32_elf_ex9_finish (link_info); 11895 pass++; 11896 *again = TRUE; 11897 break; 11898 case NDS32_RELAX_EX9_REPLACE_ROUND: 11899 if (table->target_optimize & NDS32_RELAX_JUMP_IFC_ON) 11900 { 11901 /* Do jump IFC optimization again. */ 11902 if (!nds32_elf_ifc_finish (link_info)) 11903 (*_bfd_error_handler) (_("error: Jump IFC Fail.")); 11904 } 11905 break; 11906 default: 11907 break; 11908 } 11909 } 11910 11911 return relax_round; 11912} 11913 11914static bfd_boolean 11915nds32_elf_relax_section (bfd *abfd, asection *sec, 11916 struct bfd_link_info *link_info, bfd_boolean *again) 11917{ 11918 nds32_elf_blank_t *relax_blank_list = NULL; 11919 Elf_Internal_Shdr *symtab_hdr; 11920 Elf_Internal_Rela *internal_relocs; 11921 Elf_Internal_Rela *irel; 11922 Elf_Internal_Rela *irelend; 11923 Elf_Internal_Sym *isymbuf = NULL; 11924 bfd_byte *contents = NULL; 11925 bfd_boolean result = TRUE; 11926 int optimize = 0; 11927 int opt_size = 0; 11928 uint32_t insn; 11929 uint16_t insn16; 11930 11931 /* Target dependnet option. */ 11932 struct elf_nds32_link_hash_table *table; 11933 int load_store_relax; 11934 int relax_round; 11935 11936 relax_blank_list = NULL; 11937 11938 *again = FALSE; 11939 11940 /* Nothing to do for 11941 * relocatable link or 11942 * non-relocatable section or 11943 * non-code section or 11944 * empty content or 11945 * no reloc entry. */ 11946 if (link_info->relocatable 11947 || (sec->flags & SEC_RELOC) == 0 11948 || (sec->flags & SEC_EXCLUDE) == 1 11949 || (sec->flags & SEC_CODE) == 0 11950 || sec->size == 0) 11951 return TRUE; 11952 11953 /* 09.12.11 Workaround. */ 11954 /* We have to adjust align for R_NDS32_LABEL if needed. 11955 The adjust approach only can fix 2-byte align once. */ 11956 if (sec->alignment_power > 2) 11957 return TRUE; 11958 11959 /* The optimization type to do. */ 11960 11961 table = nds32_elf_hash_table (link_info); 11962 relax_round = nds32_elf_pick_relax (TRUE, sec, again, table, link_info); 11963 switch (relax_round) 11964 { 11965 case NDS32_RELAX_JUMP_IFC_ROUND: 11966 /* Here is the entrance of ifc jump relaxation. */ 11967 if (!nds32_elf_ifc_calc (link_info, abfd, sec)) 11968 return FALSE; 11969 nds32_elf_pick_relax (FALSE, sec, again, table, link_info); 11970 return TRUE; 11971 11972 case NDS32_RELAX_EX9_BUILD_ROUND: 11973 /* Here is the entrance of ex9 relaxation. There are two pass of 11974 ex9 relaxation. The one is to traverse all instructions and build 11975 the hash table. The other one is to compare instructions and replace 11976 it by ex9.it. */ 11977 if (!nds32_elf_ex9_build_hash_table (abfd, sec, link_info)) 11978 return FALSE; 11979 nds32_elf_pick_relax (FALSE, sec, again, table, link_info); 11980 return TRUE; 11981 11982 case NDS32_RELAX_EX9_REPLACE_ROUND: 11983 if (!nds32_elf_ex9_replace_instruction (link_info, abfd, sec)) 11984 return FALSE; 11985 return TRUE; 11986 11987 case NDS32_RELAX_EMPTY_ROUND: 11988 nds32_elf_pick_relax (FALSE, sec, again, table, link_info); 11989 return TRUE; 11990 11991 case NDS32_RELAX_NORMAL_ROUND: 11992 default: 11993 if (sec->reloc_count == 0) 11994 return TRUE; 11995 break; 11996 } 11997 11998 /* The begining of general relaxation. */ 11999 12000 if (is_SDA_BASE_set == 0) 12001 { 12002 bfd_vma gp; 12003 is_SDA_BASE_set = 1; 12004 nds32_elf_final_sda_base (sec->output_section->owner, link_info, 12005 &gp, FALSE); 12006 relax_range_measurement (abfd); 12007 } 12008 12009 if (is_ITB_BASE_set == 0) 12010 { 12011 /* Set the _ITB_BASE_. */ 12012 if (!nds32_elf_ex9_itb_base (link_info)) 12013 { 12014 (*_bfd_error_handler) (_("%B: error: Cannot set _ITB_BASE_"), abfd); 12015 bfd_set_error (bfd_error_bad_value); 12016 } 12017 } 12018 12019 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 12020 /* Relocations MUST be kept in memory, because relaxation adjust them. */ 12021 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, 12022 TRUE /* keep_memory */); 12023 if (internal_relocs == NULL) 12024 goto error_return; 12025 12026 irelend = internal_relocs + sec->reloc_count; 12027 irel = find_relocs_at_address (internal_relocs, internal_relocs, 12028 irelend, R_NDS32_RELAX_ENTRY); 12029 12030 if (irel == irelend) 12031 return TRUE; 12032 12033 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_ENTRY) 12034 { 12035 if (irel->r_addend & R_NDS32_RELAX_ENTRY_DISABLE_RELAX_FLAG) 12036 return TRUE; 12037 12038 if (irel->r_addend & R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG) 12039 optimize = 1; 12040 12041 if (irel->r_addend & R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG) 12042 opt_size = 1; 12043 } 12044 12045 load_store_relax = table->load_store_relax; 12046 12047 /* Get symbol table and section content. */ 12048 if (!nds32_get_section_contents (abfd, sec, &contents) 12049 || !nds32_get_local_syms (abfd, sec, &isymbuf)) 12050 goto error_return; 12051 12052 /* Do relax loop only when finalize is not done. 12053 Take care of relaxable relocs except INSN16. */ 12054 for (irel = internal_relocs; irel < irelend; irel++) 12055 { 12056 int seq_len; /* Original length of instruction sequence. */ 12057 int insn_len = 0; /* Final length of instruction sequence. */ 12058 bfd_boolean removed; 12059 12060 insn = 0; 12061 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 12062 && (irel->r_addend & 0x1f) >= 2) 12063 optimize = 1; 12064 12065 /* Relocation Types 12066 R_NDS32_LONGCALL1 53 12067 R_NDS32_LONGCALL2 54 12068 R_NDS32_LONGCALL3 55 12069 R_NDS32_LONGJUMP1 56 12070 R_NDS32_LONGJUMP2 57 12071 R_NDS32_LONGJUMP3 58 12072 R_NDS32_LOADSTORE 59 */ 12073 if (ELF32_R_TYPE (irel->r_info) >= R_NDS32_LONGCALL1 12074 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_LOADSTORE) 12075 seq_len = GET_SEQ_LEN (irel->r_addend); 12076 12077 /* Relocation Types 12078 R_NDS32_LONGCALL4 107 12079 R_NDS32_LONGCALL5 108 12080 R_NDS32_LONGCALL6 109 12081 R_NDS32_LONGJUMP4 110 12082 R_NDS32_LONGJUMP5 111 12083 R_NDS32_LONGJUMP6 112 12084 R_NDS32_LONGJUMP7 113 */ 12085 else if (ELF32_R_TYPE (irel->r_info) >= R_NDS32_LONGCALL4 12086 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_LONGJUMP7) 12087 seq_len = 4; 12088 12089 /* Relocation Types 12090 R_NDS32_LO12S0_RELA 30 12091 R_NDS32_LO12S1_RELA 29 12092 R_NDS32_LO12S2_RELA 28 12093 R_NDS32_LO12S2_SP_RELA 71 12094 R_NDS32_LO12S2_DP_RELA 70 12095 R_NDS32_GOT_LO12 46 12096 R_NDS32_GOTOFF_LO12 50 12097 R_NDS32_PLTREL_LO12 65 12098 R_NDS32_PLT_GOTREL_LO12 67 12099 R_NDS32_17IFC_PCREL_RELA 96 12100 R_NDS32_GOT_SUFF 193 12101 R_NDS32_GOTOFF_SUFF 194 12102 R_NDS32_PLT_GOT_SUFF 195 12103 R_NDS32_MULCALL_SUFF 196 12104 R_NDS32_PTR 197 */ 12105 else if ((ELF32_R_TYPE (irel->r_info) <= R_NDS32_LO12S0_RELA 12106 && ELF32_R_TYPE (irel->r_info) >= R_NDS32_LO12S2_RELA) 12107 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S2_SP_RELA 12108 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S2_DP_RELA 12109 || ELF32_R_TYPE (irel->r_info) == R_NDS32_GOT_LO12 12110 || ELF32_R_TYPE (irel->r_info) == R_NDS32_GOTOFF_LO12 12111 || ELF32_R_TYPE (irel->r_info) == R_NDS32_GOTPC_LO12 12112 || ELF32_R_TYPE (irel->r_info) == R_NDS32_PLTREL_LO12 12113 || ELF32_R_TYPE (irel->r_info) == R_NDS32_PLT_GOTREL_LO12 12114 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_GOT_SUFF 12115 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_PTR) 12116 || ELF32_R_TYPE (irel->r_info) == R_NDS32_17IFC_PCREL_RELA 12117 || ELF32_R_TYPE (irel->r_info) == R_NDS32_TLS_LE_LO12 12118 || ELF32_R_TYPE (irel->r_info) == R_NDS32_TLS_LE_ADD 12119 || ELF32_R_TYPE (irel->r_info) == R_NDS32_TLS_LE_LS) 12120 seq_len = 0; 12121 else 12122 continue; 12123 12124 insn_len = seq_len; 12125 removed = FALSE; 12126 12127 switch (ELF32_R_TYPE (irel->r_info)) 12128 { 12129 case R_NDS32_LONGCALL1: 12130 removed = nds32_elf_relax_longcall1 (abfd, sec, irel, internal_relocs, 12131 &insn_len, contents, isymbuf, 12132 symtab_hdr); 12133 break; 12134 case R_NDS32_LONGCALL2: 12135 removed = nds32_elf_relax_longcall2 (abfd, sec, irel, internal_relocs, 12136 &insn_len, contents, isymbuf, 12137 symtab_hdr); 12138 break; 12139 case R_NDS32_LONGCALL3: 12140 removed = nds32_elf_relax_longcall3 (abfd, sec, irel, internal_relocs, 12141 &insn_len, contents, isymbuf, 12142 symtab_hdr); 12143 break; 12144 case R_NDS32_LONGJUMP1: 12145 removed = nds32_elf_relax_longjump1 (abfd, sec, irel, internal_relocs, 12146 &insn_len, contents, isymbuf, 12147 symtab_hdr); 12148 break; 12149 case R_NDS32_LONGJUMP2: 12150 removed = nds32_elf_relax_longjump2 (abfd, sec, irel, internal_relocs, 12151 &insn_len, contents, isymbuf, 12152 symtab_hdr); 12153 break; 12154 case R_NDS32_LONGJUMP3: 12155 removed = nds32_elf_relax_longjump3 (abfd, sec, irel, internal_relocs, 12156 &insn_len, contents, isymbuf, 12157 symtab_hdr); 12158 break; 12159 case R_NDS32_LONGCALL4: 12160 removed = nds32_elf_relax_longcall4 (abfd, sec, irel, internal_relocs, 12161 &insn_len, contents, isymbuf, 12162 symtab_hdr); 12163 break; 12164 case R_NDS32_LONGCALL5: 12165 removed = nds32_elf_relax_longcall5 (abfd, sec, irel, internal_relocs, 12166 &insn_len, contents, isymbuf, 12167 symtab_hdr); 12168 break; 12169 case R_NDS32_LONGCALL6: 12170 removed = nds32_elf_relax_longcall6 (abfd, sec, irel, internal_relocs, 12171 &insn_len, contents, isymbuf, 12172 symtab_hdr); 12173 break; 12174 case R_NDS32_LONGJUMP4: 12175 removed = nds32_elf_relax_longjump4 (abfd, sec, irel, internal_relocs, 12176 &insn_len, contents, isymbuf, 12177 symtab_hdr); 12178 break; 12179 case R_NDS32_LONGJUMP5: 12180 removed = nds32_elf_relax_longjump5 (abfd, sec, irel, internal_relocs, 12181 &insn_len, &seq_len, contents, 12182 isymbuf, symtab_hdr); 12183 break; 12184 case R_NDS32_LONGJUMP6: 12185 removed = nds32_elf_relax_longjump6 (abfd, sec, irel, internal_relocs, 12186 &insn_len, &seq_len, contents, 12187 isymbuf, symtab_hdr); 12188 break; 12189 case R_NDS32_LONGJUMP7: 12190 removed = nds32_elf_relax_longjump7 (abfd, sec, irel, internal_relocs, 12191 &insn_len, &seq_len, contents, 12192 isymbuf, symtab_hdr); 12193 break; 12194 case R_NDS32_LOADSTORE: 12195 removed = nds32_elf_relax_loadstore (link_info, abfd, sec, irel, 12196 internal_relocs, &insn_len, 12197 contents, isymbuf, symtab_hdr, 12198 load_store_relax); 12199 break; 12200 case R_NDS32_LO12S0_RELA: 12201 case R_NDS32_LO12S1_RELA: 12202 case R_NDS32_LO12S2_DP_RELA: 12203 case R_NDS32_LO12S2_SP_RELA: 12204 case R_NDS32_LO12S2_RELA: 12205 /* Relax for low part. */ 12206 nds32_elf_relax_lo12 (link_info, abfd, sec, irel, internal_relocs, 12207 contents, isymbuf, symtab_hdr); 12208 12209 /* It is impossible to delete blank, so just continue. */ 12210 continue; 12211 case R_NDS32_GOT_LO12: 12212 case R_NDS32_GOTOFF_LO12: 12213 case R_NDS32_PLTREL_LO12: 12214 case R_NDS32_PLT_GOTREL_LO12: 12215 case R_NDS32_GOTPC_LO12: 12216 /* Relax for PIC gp-relative low part. */ 12217 nds32_elf_relax_piclo12 (link_info, abfd, sec, irel, contents, 12218 isymbuf, symtab_hdr); 12219 12220 /* It is impossible to delete blank, so just continue. */ 12221 continue; 12222 case R_NDS32_TLS_LE_LO12: 12223 /* Relax for LE TLS low part. */ 12224 nds32_elf_relax_letlslo12 (link_info, abfd, irel, contents, 12225 isymbuf, symtab_hdr); 12226 12227 /* It is impossible to delete blank, so just continue. */ 12228 continue; 12229 case R_NDS32_TLS_LE_ADD: 12230 nds32_elf_relax_letlsadd (link_info, abfd, sec, irel, internal_relocs, 12231 contents, isymbuf, symtab_hdr, again); 12232 /* It is impossible to delete blank, so just continue. */ 12233 continue; 12234 case R_NDS32_TLS_LE_LS: 12235 nds32_elf_relax_letlsls (link_info, abfd, sec, irel, internal_relocs, 12236 contents, isymbuf, symtab_hdr, again); 12237 continue; 12238 case R_NDS32_PTR: 12239 removed = nds32_elf_relax_ptr (abfd, sec, irel, internal_relocs, 12240 &insn_len, &seq_len, contents); 12241 break; 12242 case R_NDS32_PLT_GOT_SUFF: 12243 nds32_elf_relax_pltgot_suff (link_info, abfd, sec, irel, 12244 internal_relocs, contents, 12245 isymbuf, symtab_hdr, again); 12246 /* It is impossible to delete blank, so just continue. */ 12247 continue; 12248 case R_NDS32_GOT_SUFF: 12249 nds32_elf_relax_got_suff (link_info, abfd, sec, irel, 12250 internal_relocs, contents, 12251 symtab_hdr, again); 12252 /* It is impossible to delete blank, so just continue. */ 12253 continue; 12254 case R_NDS32_GOTOFF_SUFF: 12255 nds32_elf_relax_gotoff_suff (link_info, abfd, sec, irel, 12256 internal_relocs, contents, 12257 isymbuf, symtab_hdr, again); 12258 /* It is impossible to delete blank, so just continue. */ 12259 continue; 12260 default: 12261 continue; 12262 12263 } 12264 if (removed && seq_len - insn_len > 0) 12265 { 12266 if (!insert_nds32_elf_blank 12267 (&relax_blank_list, irel->r_offset + insn_len, 12268 seq_len - insn_len)) 12269 goto error_return; 12270 *again = TRUE; 12271 } 12272 } 12273 12274 calc_nds32_blank_total (relax_blank_list); 12275 12276 if (table->relax_fp_as_gp) 12277 { 12278 if (!nds32_relax_fp_as_gp (link_info, abfd, sec, internal_relocs, 12279 irelend, isymbuf)) 12280 goto error_return; 12281 12282 if (*again == FALSE) 12283 { 12284 if (!nds32_fag_remove_unused_fpbase (abfd, sec, internal_relocs, 12285 irelend)) 12286 goto error_return; 12287 } 12288 } 12289 12290 nds32_elf_pick_relax (FALSE, sec, again, table, link_info); 12291 12292 if (*again == FALSE) 12293 { 12294 if (!nds32_relax_adjust_label (abfd, sec, internal_relocs, contents, 12295 &relax_blank_list, optimize, opt_size)) 12296 goto error_return; 12297 } 12298 12299 /* It doesn't matter optimize_for_space_no_align anymore. 12300 If object file is assembled with flag '-Os', 12301 the we don't adjust jump-destination on 4-byte boundary. */ 12302 12303 if (relax_blank_list) 12304 { 12305 nds32_elf_relax_delete_blanks (abfd, sec, relax_blank_list); 12306 relax_blank_list = NULL; 12307 } 12308 12309 if (*again == FALSE) 12310 { 12311 /* Closing the section, so we don't relax it anymore. */ 12312 bfd_vma sec_size_align; 12313 Elf_Internal_Rela *tmp_rel; 12314 12315 /* Pad to alignment boundary. Only handle current section alignment. */ 12316 sec_size_align = (sec->size + (~((-1) << sec->alignment_power))) 12317 & ((-1) << sec->alignment_power); 12318 if ((sec_size_align - sec->size) & 0x2) 12319 { 12320 insn16 = NDS32_NOP16; 12321 bfd_putb16 (insn16, contents + sec->size); 12322 sec->size += 2; 12323 } 12324 12325 while (sec_size_align != sec->size) 12326 { 12327 insn = NDS32_NOP32; 12328 bfd_putb32 (insn, contents + sec->size); 12329 sec->size += 4; 12330 } 12331 12332 tmp_rel = find_relocs_at_address (internal_relocs, internal_relocs, 12333 irelend, R_NDS32_RELAX_ENTRY); 12334 if (tmp_rel != irelend) 12335 tmp_rel->r_addend |= R_NDS32_RELAX_ENTRY_DISABLE_RELAX_FLAG; 12336 12337 clean_nds32_elf_blank (); 12338 } 12339 12340finish: 12341 if (internal_relocs != NULL 12342 && elf_section_data (sec)->relocs != internal_relocs) 12343 free (internal_relocs); 12344 12345 if (contents != NULL 12346 && elf_section_data (sec)->this_hdr.contents != contents) 12347 free (contents); 12348 12349 if (isymbuf != NULL && symtab_hdr->contents != (bfd_byte *) isymbuf) 12350 free (isymbuf); 12351 12352 return result; 12353 12354error_return: 12355 result = FALSE; 12356 goto finish; 12357} 12358 12359static struct bfd_elf_special_section const nds32_elf_special_sections[] = 12360{ 12361 {".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE}, 12362 {".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE}, 12363 {NULL, 0, 0, 0, 0} 12364}; 12365 12366static bfd_boolean 12367nds32_elf_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED, 12368 struct bfd_link_info *info, 12369 void *finfo ATTRIBUTE_UNUSED, 12370 bfd_boolean (*func) (void *, const char *, 12371 Elf_Internal_Sym *, 12372 asection *, 12373 struct elf_link_hash_entry *) 12374 ATTRIBUTE_UNUSED) 12375{ 12376 FILE *sym_ld_script = NULL; 12377 struct elf_nds32_link_hash_table *table; 12378 12379 table = nds32_elf_hash_table (info); 12380 sym_ld_script = table->sym_ld_script; 12381 12382 if (check_start_export_sym) 12383 fprintf (sym_ld_script, "}\n"); 12384 12385 return TRUE; 12386} 12387 12388static enum elf_reloc_type_class 12389nds32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 12390 const asection *rel_sec ATTRIBUTE_UNUSED, 12391 const Elf_Internal_Rela *rela) 12392{ 12393 switch ((int) ELF32_R_TYPE (rela->r_info)) 12394 { 12395 case R_NDS32_RELATIVE: 12396 return reloc_class_relative; 12397 case R_NDS32_JMP_SLOT: 12398 return reloc_class_plt; 12399 case R_NDS32_COPY: 12400 return reloc_class_copy; 12401 default: 12402 return reloc_class_normal; 12403 } 12404} 12405 12406/* Put target dependent option into info hash table. */ 12407void 12408bfd_elf32_nds32_set_target_option (struct bfd_link_info *link_info, 12409 int relax_fp_as_gp, 12410 int eliminate_gc_relocs, 12411 FILE * sym_ld_script, int load_store_relax, 12412 int target_optimize, int relax_status, 12413 int relax_round, FILE * ex9_export_file, 12414 FILE * ex9_import_file, 12415 int update_ex9_table, int ex9_limit, 12416 bfd_boolean ex9_loop_aware, 12417 bfd_boolean ifc_loop_aware) 12418{ 12419 struct elf_nds32_link_hash_table *table; 12420 12421 table = nds32_elf_hash_table (link_info); 12422 if (table == NULL) 12423 return; 12424 12425 table->relax_fp_as_gp = relax_fp_as_gp; 12426 table->eliminate_gc_relocs = eliminate_gc_relocs; 12427 table->sym_ld_script = sym_ld_script; 12428 table ->load_store_relax = load_store_relax; 12429 table->target_optimize = target_optimize; 12430 table->relax_status = relax_status; 12431 table->relax_round = relax_round; 12432 table->ex9_export_file = ex9_export_file; 12433 table->ex9_import_file = ex9_import_file; 12434 table->update_ex9_table = update_ex9_table; 12435 table->ex9_limit = ex9_limit; 12436 table->ex9_loop_aware = ex9_loop_aware; 12437 table->ifc_loop_aware = ifc_loop_aware; 12438} 12439 12440/* These functions and data-structures are used for fp-as-gp 12441 optimization. */ 12442 12443#define FAG_THRESHOLD 3 /* At least 3 gp-access. */ 12444/* lwi37.fp covers 508 bytes, but there may be 32-byte padding between 12445 the read-only section and read-write section. */ 12446#define FAG_WINDOW (508 - 32) 12447 12448/* An nds32_fag represent a gp-relative access. 12449 We find best fp-base by using a sliding window 12450 to find a base address which can cover most gp-access. */ 12451struct nds32_fag 12452{ 12453 struct nds32_fag *next; /* NULL-teminated linked list. */ 12454 bfd_vma addr; /* The address of this fag. */ 12455 Elf_Internal_Rela **relas; /* The relocations associated with this fag. 12456 It is used for applying FP7U2_FLAG. */ 12457 int count; /* How many times this address is referred. 12458 There should be exactly `count' relocations 12459 in relas. */ 12460 int relas_capcity; /* The buffer size of relas. 12461 We use an array instead of linked-list, 12462 and realloc is used to adjust buffer size. */ 12463}; 12464 12465static void 12466nds32_fag_init (struct nds32_fag *head) 12467{ 12468 memset (head, 0, sizeof (struct nds32_fag)); 12469} 12470 12471static void 12472nds32_fag_verify (struct nds32_fag *head) 12473{ 12474 struct nds32_fag *iter; 12475 struct nds32_fag *prev; 12476 12477 prev = NULL; 12478 iter = head->next; 12479 while (iter) 12480 { 12481 if (prev && prev->addr >= iter->addr) 12482 puts ("Bug in fp-as-gp insertion."); 12483 prev = iter; 12484 iter = iter->next; 12485 } 12486} 12487 12488/* Insert a fag in ascending order. 12489 If a fag of the same address already exists, 12490 they are chained by relas array. */ 12491 12492static void 12493nds32_fag_insert (struct nds32_fag *head, bfd_vma addr, 12494 Elf_Internal_Rela * rel) 12495{ 12496 struct nds32_fag *iter; 12497 struct nds32_fag *new_fag; 12498 const int INIT_RELAS_CAP = 4; 12499 12500 for (iter = head; 12501 iter->next && iter->next->addr <= addr; 12502 iter = iter->next) 12503 /* Find somewhere to insert. */ ; 12504 12505 /* `iter' will be equal to `head' if the list is empty. */ 12506 if (iter != head && iter->addr == addr) 12507 { 12508 /* The address exists in the list. 12509 Insert `rel' into relocation list, relas. */ 12510 12511 /* Check whether relas is big enough. */ 12512 if (iter->count >= iter->relas_capcity) 12513 { 12514 iter->relas_capcity *= 2; 12515 iter->relas = bfd_realloc 12516 (iter->relas, iter->relas_capcity * sizeof (void *)); 12517 } 12518 iter->relas[iter->count++] = rel; 12519 return; 12520 } 12521 12522 /* This is a new address. Create a fag node for it. */ 12523 new_fag = bfd_malloc (sizeof (struct nds32_fag)); 12524 memset (new_fag, 0, sizeof (*new_fag)); 12525 new_fag->addr = addr; 12526 new_fag->count = 1; 12527 new_fag->next = iter->next; 12528 new_fag->relas_capcity = INIT_RELAS_CAP; 12529 new_fag->relas = (Elf_Internal_Rela **) 12530 bfd_malloc (new_fag->relas_capcity * sizeof (void *)); 12531 new_fag->relas[0] = rel; 12532 iter->next = new_fag; 12533 12534 nds32_fag_verify (head); 12535} 12536 12537static void 12538nds32_fag_free_list (struct nds32_fag *head) 12539{ 12540 struct nds32_fag *iter; 12541 12542 iter = head->next; 12543 while (iter) 12544 { 12545 struct nds32_fag *tmp = iter; 12546 iter = iter->next; 12547 free (tmp->relas); 12548 tmp->relas = NULL; 12549 free (tmp); 12550 } 12551} 12552 12553/* Find the best fp-base address. 12554 The relocation associated with that address is returned, 12555 so we can track the symbol instead of a fixed address. 12556 12557 When relaxation, the address of an datum may change, 12558 because a text section is shrinked, so the data section 12559 moves forward. If the aligments of text and data section 12560 are different, their distance may change too. 12561 Therefore, tracking a fixed address is not appriate. */ 12562 12563static int 12564nds32_fag_find_base (struct nds32_fag *head, struct nds32_fag **bestpp) 12565{ 12566 struct nds32_fag *base; /* First fag in the window. */ 12567 struct nds32_fag *last; /* First fag outside the window. */ 12568 int accu = 0; /* Usage accumulation. */ 12569 struct nds32_fag *best; /* Best fag. */ 12570 int baccu = 0; /* Best accumulation. */ 12571 12572 /* Use first fag for initial, and find the last fag in the window. 12573 12574 In each iteration, we could simply subtract previous fag 12575 and accumulate following fags which are inside the window, 12576 untill we each the end. */ 12577 12578 if (head->next == NULL) 12579 { 12580 *bestpp = NULL; 12581 return 0; 12582 } 12583 12584 /* Initialize base. */ 12585 base = head->next; 12586 best = base; 12587 for (last = base; 12588 last && last->addr < base->addr + FAG_WINDOW; 12589 last = last->next) 12590 accu += last->count; 12591 12592 baccu = accu; 12593 12594 /* Record the best base in each iteration. */ 12595 while (base->next) 12596 { 12597 accu -= base->count; 12598 base = base->next; 12599 /* Account fags in window. */ 12600 for (/* Nothing. */; 12601 last && last->addr < base->addr + FAG_WINDOW; 12602 last = last->next) 12603 accu += last->count; 12604 12605 /* A better fp-base? */ 12606 if (accu > baccu) 12607 { 12608 best = base; 12609 baccu = accu; 12610 } 12611 } 12612 12613 if (bestpp) 12614 *bestpp = best; 12615 return baccu; 12616} 12617 12618/* Apply R_NDS32_INSN16_FP7U2_FLAG on gp-relative accesses, 12619 so we can convert it fo fp-relative access later. 12620 `best_fag' is the best fp-base. Only those inside the window 12621 of best_fag is applied the flag. */ 12622 12623static bfd_boolean 12624nds32_fag_mark_relax (struct bfd_link_info *link_info, 12625 bfd *abfd, struct nds32_fag *best_fag, 12626 Elf_Internal_Rela *internal_relocs, 12627 Elf_Internal_Rela *irelend) 12628{ 12629 struct nds32_fag *ifag; 12630 bfd_vma best_fpbase, gp; 12631 bfd *output_bfd; 12632 12633 output_bfd = abfd->sections->output_section->owner; 12634 nds32_elf_final_sda_base (output_bfd, link_info, &gp, FALSE); 12635 best_fpbase = best_fag->addr; 12636 12637 if (best_fpbase > gp + sdata_range[1][1] 12638 || best_fpbase < gp - sdata_range[1][0]) 12639 return FALSE; 12640 12641 /* Mark these inside the window R_NDS32_INSN16_FP7U2_FLAG flag, 12642 so we know they can be converted to lwi37.fp. */ 12643 for (ifag = best_fag; 12644 ifag && ifag->addr < best_fpbase + FAG_WINDOW; ifag = ifag->next) 12645 { 12646 int i; 12647 12648 for (i = 0; i < ifag->count; i++) 12649 { 12650 Elf_Internal_Rela *insn16_rel; 12651 Elf_Internal_Rela *fag_rel; 12652 12653 fag_rel = ifag->relas[i]; 12654 12655 /* Only if this is within the WINDOWS, FP7U2_FLAG 12656 is applied. */ 12657 12658 insn16_rel = find_relocs_at_address 12659 (fag_rel, internal_relocs, irelend, R_NDS32_INSN16); 12660 12661 if (insn16_rel != irelend) 12662 insn16_rel->r_addend = R_NDS32_INSN16_FP7U2_FLAG; 12663 } 12664 } 12665 return TRUE; 12666} 12667 12668/* Reset INSN16 to clean fp as gp. */ 12669 12670static void 12671nds32_fag_unmark_relax (struct nds32_fag *fag, 12672 Elf_Internal_Rela *internal_relocs, 12673 Elf_Internal_Rela *irelend) 12674{ 12675 struct nds32_fag *ifag; 12676 int i; 12677 Elf_Internal_Rela *insn16_rel; 12678 Elf_Internal_Rela *fag_rel; 12679 12680 for (ifag = fag; ifag; ifag = ifag->next) 12681 { 12682 for (i = 0; i < ifag->count; i++) 12683 { 12684 fag_rel = ifag->relas[i]; 12685 12686 /* Restore the INSN16 relocation. */ 12687 insn16_rel = find_relocs_at_address 12688 (fag_rel, internal_relocs, irelend, R_NDS32_INSN16); 12689 12690 if (insn16_rel != irelend) 12691 insn16_rel->r_addend &= ~R_NDS32_INSN16_FP7U2_FLAG; 12692 } 12693 } 12694} 12695 12696/* This is the main function of fp-as-gp optimization. 12697 It should be called by relax_section. */ 12698 12699static bfd_boolean 12700nds32_relax_fp_as_gp (struct bfd_link_info *link_info, 12701 bfd *abfd, asection *sec, 12702 Elf_Internal_Rela *internal_relocs, 12703 Elf_Internal_Rela *irelend, 12704 Elf_Internal_Sym *isymbuf) 12705{ 12706 Elf_Internal_Rela *begin_rel = NULL; 12707 Elf_Internal_Rela *irel; 12708 struct nds32_fag fag_head; 12709 Elf_Internal_Shdr *symtab_hdr; 12710 bfd_byte *contents; 12711 bfd_boolean ifc_inside = FALSE; 12712 12713 /* FIXME: Can we bfd_elf_link_read_relocs for the relocs? */ 12714 12715 /* Per-function fp-base selection. 12716 1. Create a list for all the gp-relative access. 12717 2. Base on those gp-relative address, 12718 find a fp-base which can cover most access. 12719 3. Use the fp-base for fp-as-gp relaxation. 12720 12721 NOTE: If fp-as-gp is not worth to do, (e.g., less than 3 times), 12722 we should 12723 1. delete the `la $fp, _FP_BASE_' instruction and 12724 2. not convert lwi.gp to lwi37.fp. 12725 12726 To delete the _FP_BASE_ instruction, we simply apply 12727 R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG flag in the r_addend to disable it. 12728 12729 To suppress the conversion, we simply NOT to apply 12730 R_NDS32_INSN16_FP7U2_FLAG flag. */ 12731 12732 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 12733 12734 if (!nds32_get_section_contents (abfd, sec, &contents) 12735 || !nds32_get_local_syms (abfd, sec, &isymbuf)) 12736 return FALSE; 12737 12738 /* Check whether it is worth for fp-as-gp optimization, 12739 i.e., at least 3 gp-load. 12740 12741 Set R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG if we should NOT 12742 apply this optimization. */ 12743 12744 for (irel = internal_relocs; irel < irelend; irel++) 12745 { 12746 /* We recognize R_NDS32_RELAX_REGION_BEGIN/_END for the region. 12747 One we enter the begin of the region, we track all the LW/ST 12748 instructions, so when we leave the region, we try to find 12749 the best fp-base address for those LW/ST instructions. */ 12750 12751 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_BEGIN 12752 && (irel->r_addend & R_NDS32_RELAX_REGION_OMIT_FP_FLAG)) 12753 { 12754 /* Begin of the region. */ 12755 if (begin_rel) 12756 (*_bfd_error_handler) (_("%B: Nested OMIT_FP in %A."), abfd, sec); 12757 12758 begin_rel = irel; 12759 nds32_fag_init (&fag_head); 12760 ifc_inside = FALSE; 12761 } 12762 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_END 12763 && (irel->r_addend & R_NDS32_RELAX_REGION_OMIT_FP_FLAG)) 12764 { 12765 int accu; 12766 struct nds32_fag *best_fag, *tmp_fag; 12767 int dist; 12768 12769 /* End of the region. 12770 Check whether it is worth to do fp-as-gp. */ 12771 12772 if (begin_rel == NULL) 12773 { 12774 (*_bfd_error_handler) (_("%B: Unmatched OMIT_FP in %A."), abfd, sec); 12775 continue; 12776 } 12777 12778 accu = nds32_fag_find_base (&fag_head, &best_fag); 12779 12780 /* Clean FP7U2_FLAG because they may set ever. */ 12781 tmp_fag = fag_head.next; 12782 nds32_fag_unmark_relax (tmp_fag, internal_relocs, irelend); 12783 12784 /* Check if it is worth, and FP_BASE is near enough to SDA_BASE. */ 12785 if (accu < FAG_THRESHOLD 12786 || !nds32_fag_mark_relax (link_info, abfd, best_fag, 12787 internal_relocs, irelend)) 12788 { 12789 /* Not worth to do fp-as-gp. */ 12790 begin_rel->r_addend |= R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG; 12791 begin_rel->r_addend &= ~R_NDS32_RELAX_REGION_OMIT_FP_FLAG; 12792 irel->r_addend |= R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG; 12793 irel->r_addend &= ~R_NDS32_RELAX_REGION_OMIT_FP_FLAG; 12794 nds32_fag_free_list (&fag_head); 12795 begin_rel = NULL; 12796 continue; 12797 } 12798 12799 /* R_SYM of R_NDS32_RELAX_REGION_BEGIN is not used by assembler, 12800 so we use it to record the distance to the reloction of best 12801 fp-base. */ 12802 dist = best_fag->relas[0] - begin_rel; 12803 BFD_ASSERT (dist > 0 && dist < 0xffffff); 12804 /* Use high 16 bits of addend to record the _FP_BASE_ matched 12805 relocation. And get the base value when relocating. */ 12806 begin_rel->r_addend &= (0x1 << 16) - 1; 12807 begin_rel->r_addend |= dist << 16; 12808 12809 nds32_fag_free_list (&fag_head); 12810 begin_rel = NULL; 12811 } 12812 12813 if (begin_rel == NULL || ifc_inside) 12814 /* Skip if we are not in the region of fp-as-gp. */ 12815 continue; 12816 12817 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_SDA15S2_RELA 12818 || ELF32_R_TYPE (irel->r_info) == R_NDS32_SDA17S2_RELA) 12819 { 12820 bfd_vma addr; 12821 uint32_t insn; 12822 12823 /* A gp-relative access is found. Insert it to the fag-list. */ 12824 12825 /* Rt is necessary an RT3, so it can be converted to lwi37.fp. */ 12826 insn = bfd_getb32 (contents + irel->r_offset); 12827 if (!N32_IS_RT3 (insn)) 12828 continue; 12829 12830 addr = calculate_memory_address (abfd, irel, isymbuf, symtab_hdr); 12831 nds32_fag_insert (&fag_head, addr, irel); 12832 } 12833 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_SDA_FP7U2_RELA) 12834 { 12835 begin_rel = NULL; 12836 } 12837 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_17IFC_PCREL_RELA 12838 || ELF32_R_TYPE (irel->r_info) == R_NDS32_10IFCU_PCREL_RELA) 12839 { 12840 /* Suppress fp as gp when encounter ifc. */ 12841 ifc_inside = TRUE; 12842 } 12843 } 12844 12845 return TRUE; 12846} 12847 12848/* Remove unused `la $fp, _FD_BASE_' instruction. */ 12849 12850static bfd_boolean 12851nds32_fag_remove_unused_fpbase (bfd *abfd, asection *sec, 12852 Elf_Internal_Rela *internal_relocs, 12853 Elf_Internal_Rela *irelend) 12854{ 12855 Elf_Internal_Rela *irel; 12856 Elf_Internal_Shdr *symtab_hdr; 12857 bfd_byte *contents = NULL; 12858 nds32_elf_blank_t *relax_blank_list = NULL; 12859 bfd_boolean result = TRUE; 12860 bfd_boolean unused_region = FALSE; 12861 12862 /* 12863 NOTE: Disable fp-as-gp if we encounter ifcall relocations. 12864 * R_NDS32_17IFC_PCREL_RELA 12865 * R_NDS32_10IFCU_PCREL_RELA 12866 12867 CASE?????????????? 12868 */ 12869 12870 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 12871 nds32_get_section_contents (abfd, sec, &contents); 12872 12873 for (irel = internal_relocs; irel < irelend; irel++) 12874 { 12875 /* To remove unused fp-base, we simply find the REGION_NOT_OMIT_FP 12876 we marked to in previous pass. 12877 DO NOT scan relocations again, since we've alreadly decided it 12878 and set the flag. */ 12879 const char *syname; 12880 int syndx; 12881 uint32_t insn; 12882 12883 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_BEGIN 12884 && (irel->r_addend & R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG)) 12885 unused_region = TRUE; 12886 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_END 12887 && (irel->r_addend & R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG)) 12888 unused_region = FALSE; 12889 12890 /* We're not in the region. */ 12891 if (!unused_region) 12892 continue; 12893 12894 /* _FP_BASE_ must be a GLOBAL symbol. */ 12895 syndx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 12896 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 12897 continue; 12898 12899 /* The symbol name must be _FP_BASE_. */ 12900 syname = elf_sym_hashes (abfd)[syndx]->root.root.string; 12901 if (strcmp (syname, FP_BASE_NAME) != 0) 12902 continue; 12903 12904 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_SDA19S0_RELA) 12905 { 12906 /* addi.gp $fp, -256 */ 12907 insn = bfd_getb32 (contents + irel->r_offset); 12908 if (insn != INSN_ADDIGP_TO_FP) 12909 continue; 12910 } 12911 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_SDA15S0_RELA) 12912 { 12913 /* addi $fp, $gp, -256 */ 12914 insn = bfd_getb32 (contents + irel->r_offset); 12915 if (insn != INSN_ADDI_GP_TO_FP) 12916 continue; 12917 } 12918 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_20_RELA) 12919 { 12920 /* movi $fp, FP_BASE */ 12921 insn = bfd_getb32 (contents + irel->r_offset); 12922 if (insn != INSN_MOVI_TO_FP) 12923 continue; 12924 } 12925 else 12926 continue; 12927 12928 /* We got here because a FP_BASE instruction is found. */ 12929 if (!insert_nds32_elf_blank_recalc_total 12930 (&relax_blank_list, irel->r_offset, 4)) 12931 goto error_return; 12932 } 12933 12934finish: 12935 if (relax_blank_list) 12936 { 12937 nds32_elf_relax_delete_blanks (abfd, sec, relax_blank_list); 12938 relax_blank_list = NULL; 12939 } 12940 return result; 12941 12942error_return: 12943 result = FALSE; 12944 goto finish; 12945} 12946 12947/* This is a version of bfd_generic_get_relocated_section_contents. 12948 We need this variety because relaxation will modify the dwarf 12949 infomation. When there is undefined symbol reference error mesage, 12950 linker need to dump line number where the symbol be used. However 12951 the address is be relaxed, it can not get the original dwarf contents. 12952 The variety only modify function call for reading in the section. */ 12953 12954static bfd_byte * 12955nds32_elf_get_relocated_section_contents (bfd *abfd, 12956 struct bfd_link_info *link_info, 12957 struct bfd_link_order *link_order, 12958 bfd_byte *data, 12959 bfd_boolean relocatable, 12960 asymbol **symbols) 12961{ 12962 bfd *input_bfd = link_order->u.indirect.section->owner; 12963 asection *input_section = link_order->u.indirect.section; 12964 long reloc_size; 12965 arelent **reloc_vector; 12966 long reloc_count; 12967 12968 reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); 12969 if (reloc_size < 0) 12970 return NULL; 12971 12972 /* Read in the section. */ 12973 if (!nds32_get_section_contents (input_bfd, input_section, &data)) 12974 return NULL; 12975 12976 if (reloc_size == 0) 12977 return data; 12978 12979 reloc_vector = (arelent **) bfd_malloc (reloc_size); 12980 if (reloc_vector == NULL) 12981 return NULL; 12982 12983 reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, 12984 reloc_vector, symbols); 12985 if (reloc_count < 0) 12986 goto error_return; 12987 12988 if (reloc_count > 0) 12989 { 12990 arelent **parent; 12991 for (parent = reloc_vector; *parent != NULL; parent++) 12992 { 12993 char *error_message = NULL; 12994 asymbol *symbol; 12995 bfd_reloc_status_type r; 12996 12997 symbol = *(*parent)->sym_ptr_ptr; 12998 if (symbol->section && discarded_section (symbol->section)) 12999 { 13000 bfd_byte *p; 13001 static reloc_howto_type none_howto 13002 = HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL, 13003 "unused", FALSE, 0, 0, FALSE); 13004 13005 p = data + (*parent)->address * bfd_octets_per_byte (input_bfd); 13006 _bfd_clear_contents ((*parent)->howto, input_bfd, input_section, 13007 p); 13008 (*parent)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 13009 (*parent)->addend = 0; 13010 (*parent)->howto = &none_howto; 13011 r = bfd_reloc_ok; 13012 } 13013 else 13014 r = bfd_perform_relocation (input_bfd, *parent, data, 13015 input_section, 13016 relocatable ? abfd : NULL, 13017 &error_message); 13018 13019 if (relocatable) 13020 { 13021 asection *os = input_section->output_section; 13022 13023 /* A partial link, so keep the relocs. */ 13024 os->orelocation[os->reloc_count] = *parent; 13025 os->reloc_count++; 13026 } 13027 13028 if (r != bfd_reloc_ok) 13029 { 13030 switch (r) 13031 { 13032 case bfd_reloc_undefined: 13033 if (!((*link_info->callbacks->undefined_symbol) 13034 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), 13035 input_bfd, input_section, (*parent)->address, TRUE))) 13036 goto error_return; 13037 break; 13038 case bfd_reloc_dangerous: 13039 BFD_ASSERT (error_message != NULL); 13040 if (!((*link_info->callbacks->reloc_dangerous) 13041 (link_info, error_message, input_bfd, input_section, 13042 (*parent)->address))) 13043 goto error_return; 13044 break; 13045 case bfd_reloc_overflow: 13046 if (!((*link_info->callbacks->reloc_overflow) 13047 (link_info, NULL, 13048 bfd_asymbol_name (*(*parent)->sym_ptr_ptr), 13049 (*parent)->howto->name, (*parent)->addend, 13050 input_bfd, input_section, (*parent)->address))) 13051 goto error_return; 13052 break; 13053 case bfd_reloc_outofrange: 13054 /* PR ld/13730: 13055 This error can result when processing some partially 13056 complete binaries. Do not abort, but issue an error 13057 message instead. */ 13058 link_info->callbacks->einfo 13059 (_("%X%P: %B(%A): relocation \"%R\" goes out of range\n"), 13060 abfd, input_section, * parent); 13061 goto error_return; 13062 13063 default: 13064 abort (); 13065 break; 13066 } 13067 } 13068 } 13069 } 13070 13071 free (reloc_vector); 13072 return data; 13073 13074error_return: 13075 free (reloc_vector); 13076 return NULL; 13077} 13078 13079/* Link-time IFC relaxation. 13080 In this optimization, we chains jump instructions 13081 of the same destination with ifcall. */ 13082 13083 13084/* List to save jal and j relocation. */ 13085struct elf_nds32_ifc_symbol_entry 13086{ 13087 asection *sec; 13088 struct elf_link_hash_entry *h; 13089 struct elf_nds32_ifc_irel_list *irel_head; 13090 unsigned long insn; 13091 int times; 13092 int enable; /* Apply ifc. */ 13093 int ex9_enable; /* Apply ifc after ex9. */ 13094 struct elf_nds32_ifc_symbol_entry *next; 13095}; 13096 13097struct elf_nds32_ifc_irel_list 13098{ 13099 Elf_Internal_Rela *irel; 13100 asection *sec; 13101 bfd_vma addr; 13102 /* If this is set, then it is the last instruction for 13103 ifc-chain, so it must be keep for the actual branching. */ 13104 int keep; 13105 struct elf_nds32_ifc_irel_list *next; 13106}; 13107 13108static struct elf_nds32_ifc_symbol_entry *ifc_symbol_head = NULL; 13109 13110/* Insert symbol of jal and j for ifc. */ 13111 13112static void 13113nds32_elf_ifc_insert_symbol (asection *sec, 13114 struct elf_link_hash_entry *h, 13115 Elf_Internal_Rela *irel, 13116 unsigned long insn) 13117{ 13118 struct elf_nds32_ifc_symbol_entry *ptr = ifc_symbol_head; 13119 13120 /* Check there is target of existing entry the same as the new one. */ 13121 while (ptr != NULL) 13122 { 13123 if (((h == NULL && ptr->sec == sec 13124 && ELF32_R_SYM (ptr->irel_head->irel->r_info) == ELF32_R_SYM (irel->r_info) 13125 && ptr->irel_head->irel->r_addend == irel->r_addend) 13126 || h != NULL) 13127 && ptr->h == h 13128 && ptr->insn == insn) 13129 { 13130 /* The same target exist, so insert into list. */ 13131 struct elf_nds32_ifc_irel_list *irel_list = ptr->irel_head; 13132 13133 while (irel_list->next != NULL) 13134 irel_list = irel_list->next; 13135 irel_list->next = bfd_malloc (sizeof (struct elf_nds32_ifc_irel_list)); 13136 irel_list = irel_list->next; 13137 irel_list->irel = irel; 13138 irel_list->keep = 1; 13139 13140 if (h == NULL) 13141 irel_list->sec = NULL; 13142 else 13143 irel_list->sec = sec; 13144 irel_list->next = NULL; 13145 return; 13146 } 13147 if (ptr->next == NULL) 13148 break; 13149 ptr = ptr->next; 13150 } 13151 13152 /* There is no same target entry, so build a new one. */ 13153 if (ifc_symbol_head == NULL) 13154 { 13155 ifc_symbol_head = bfd_malloc (sizeof (struct elf_nds32_ifc_symbol_entry)); 13156 ptr = ifc_symbol_head; 13157 } 13158 else 13159 { 13160 ptr->next = bfd_malloc (sizeof (struct elf_nds32_ifc_symbol_entry)); 13161 ptr = ptr->next; 13162 } 13163 13164 ptr->h = h; 13165 ptr->irel_head = bfd_malloc (sizeof (struct elf_nds32_ifc_irel_list)); 13166 ptr->irel_head->irel = irel; 13167 ptr->insn = insn; 13168 ptr->irel_head->keep = 1; 13169 13170 if (h == NULL) 13171 { 13172 /* Local symbols. */ 13173 ptr->sec = sec; 13174 ptr->irel_head->sec = NULL; 13175 } 13176 else 13177 { 13178 /* Global symbol. */ 13179 ptr->sec = NULL; 13180 ptr->irel_head->sec = sec; 13181 } 13182 13183 ptr->irel_head->next = NULL; 13184 ptr->times = 0; 13185 ptr->enable = 0; 13186 ptr->ex9_enable = 0; 13187 ptr->next = NULL; 13188} 13189 13190/* Gather all jal and j instructions. */ 13191 13192static bfd_boolean 13193nds32_elf_ifc_calc (struct bfd_link_info *info, 13194 bfd *abfd, asection *sec) 13195{ 13196 Elf_Internal_Rela *internal_relocs; 13197 Elf_Internal_Rela *irelend; 13198 Elf_Internal_Rela *irel; 13199 Elf_Internal_Shdr *symtab_hdr; 13200 bfd_byte *contents = NULL; 13201 uint32_t insn, insn_with_reg; 13202 unsigned long r_symndx; 13203 struct elf_link_hash_entry *h; 13204 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (abfd); 13205 struct elf_nds32_link_hash_table *table; 13206 bfd_boolean ifc_loop_aware; 13207 13208 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, 13209 TRUE /* keep_memory */); 13210 irelend = internal_relocs + sec->reloc_count; 13211 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 13212 13213 /* Check if the object enable ifc. */ 13214 irel = find_relocs_at_address (internal_relocs, internal_relocs, irelend, 13215 R_NDS32_RELAX_ENTRY); 13216 13217 if (irel == NULL 13218 || irel >= irelend 13219 || ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_ENTRY 13220 || (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_ENTRY 13221 && !(irel->r_addend & R_NDS32_RELAX_ENTRY_IFC_FLAG))) 13222 return TRUE; 13223 13224 if (!nds32_get_section_contents (abfd, sec, &contents)) 13225 return FALSE; 13226 13227 table = nds32_elf_hash_table (info); 13228 ifc_loop_aware = table->ifc_loop_aware; 13229 while (irel != NULL && irel < irelend) 13230 { 13231 /* Traverse all relocation and gather all of them to build the list. */ 13232 13233 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_BEGIN) 13234 { 13235 if (ifc_loop_aware == 1 13236 && (irel->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG) != 0) 13237 { 13238 /* Check the region if loop or not. If it is true and 13239 ifc-loop-aware is true, ignore the region till region end. */ 13240 while (irel != NULL 13241 && irel < irelend 13242 && (ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_REGION_END 13243 || (irel->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG) != 0)) 13244 irel++; 13245 } 13246 } 13247 13248 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_25_PCREL_RELA) 13249 { 13250 insn = bfd_getb32 (contents + irel->r_offset); 13251 nds32_elf_get_insn_with_reg (irel, insn, &insn_with_reg); 13252 r_symndx = ELF32_R_SYM (irel->r_info); 13253 if (r_symndx < symtab_hdr->sh_info) 13254 { 13255 /* Local symbol. */ 13256 nds32_elf_ifc_insert_symbol (sec, NULL, irel, insn_with_reg); 13257 } 13258 else 13259 { 13260 /* External symbol. */ 13261 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 13262 nds32_elf_ifc_insert_symbol (sec, h, irel, insn_with_reg); 13263 } 13264 } 13265 irel++; 13266 } 13267 return TRUE; 13268} 13269 13270/* Determine whether j and jal should be substituted. */ 13271 13272static void 13273nds32_elf_ifc_filter (struct bfd_link_info *info) 13274{ 13275 struct elf_nds32_ifc_symbol_entry *ptr = ifc_symbol_head; 13276 struct elf_nds32_ifc_irel_list *irel_ptr = NULL; 13277 struct elf_nds32_ifc_irel_list *irel_keeper = NULL; 13278 struct elf_nds32_link_hash_table *table; 13279 int target_optimize; 13280 bfd_vma address; 13281 13282 table = nds32_elf_hash_table (info); 13283 target_optimize = table->target_optimize; 13284 while (ptr) 13285 { 13286 irel_ptr = ptr->irel_head; 13287 if (ptr->h == NULL) 13288 { 13289 /* Local symbol. */ 13290 irel_keeper = irel_ptr; 13291 while (irel_ptr && irel_ptr->next) 13292 { 13293 /* Check there is jump target can be used. */ 13294 if ((irel_ptr->next->irel->r_offset 13295 - irel_keeper->irel->r_offset) > 1022) 13296 irel_keeper = irel_ptr->next; 13297 else 13298 { 13299 ptr->enable = 1; 13300 irel_ptr->keep = 0; 13301 } 13302 irel_ptr = irel_ptr->next; 13303 } 13304 } 13305 else 13306 { 13307 /* Global symbol. */ 13308 /* We have to get the absolute address and decide 13309 whether to keep it or not. */ 13310 while (irel_ptr) 13311 { 13312 address = (irel_ptr->irel->r_offset 13313 + irel_ptr->sec->output_section->vma 13314 + irel_ptr->sec->output_offset); 13315 irel_ptr->addr = address; 13316 irel_ptr = irel_ptr->next; 13317 } 13318 13319 irel_ptr = ptr->irel_head; 13320 while (irel_ptr) 13321 { 13322 /* Sort by address. */ 13323 struct elf_nds32_ifc_irel_list *irel_dest = irel_ptr; 13324 struct elf_nds32_ifc_irel_list *irel_temp = irel_ptr; 13325 struct elf_nds32_ifc_irel_list *irel_ptr_prev = NULL; 13326 struct elf_nds32_ifc_irel_list *irel_dest_prev = NULL; 13327 13328 /* Get the smallest one. */ 13329 while (irel_temp->next) 13330 { 13331 if (irel_temp->next->addr < irel_dest->addr) 13332 { 13333 irel_dest_prev = irel_temp; 13334 irel_dest = irel_temp->next; 13335 } 13336 irel_temp = irel_temp->next; 13337 } 13338 13339 if (irel_dest != irel_ptr) 13340 { 13341 if (irel_ptr_prev) 13342 irel_ptr_prev->next = irel_dest; 13343 if (irel_dest_prev) 13344 irel_dest_prev->next = irel_ptr; 13345 irel_temp = irel_ptr->next; 13346 irel_ptr->next = irel_dest->next; 13347 irel_dest->next = irel_temp; 13348 } 13349 irel_ptr_prev = irel_ptr; 13350 irel_ptr = irel_ptr->next; 13351 } 13352 13353 irel_ptr = ptr->irel_head; 13354 irel_keeper = irel_ptr; 13355 while (irel_ptr && irel_ptr->next) 13356 { 13357 if ((irel_ptr->next->addr - irel_keeper->addr) > 1022) 13358 irel_keeper = irel_ptr->next; 13359 else 13360 { 13361 ptr->enable = 1; 13362 irel_ptr->keep = 0; 13363 } 13364 irel_ptr = irel_ptr->next; 13365 } 13366 } 13367 13368 /* Ex9 enable. Reserve it for ex9. */ 13369 if ((target_optimize & NDS32_RELAX_EX9_ON) 13370 && ptr->irel_head != irel_keeper) 13371 ptr->enable = 0; 13372 ptr = ptr->next; 13373 } 13374} 13375 13376/* Determine whether j and jal should be substituted after ex9 done. */ 13377 13378static void 13379nds32_elf_ifc_filter_after_ex9 (void) 13380{ 13381 struct elf_nds32_ifc_symbol_entry *ptr = ifc_symbol_head; 13382 struct elf_nds32_ifc_irel_list *irel_ptr = NULL; 13383 13384 while (ptr) 13385 { 13386 if (ptr->enable == 0) 13387 { 13388 /* Check whether ifc is applied or not. */ 13389 irel_ptr = ptr->irel_head; 13390 ptr->ex9_enable = 1; 13391 while (irel_ptr) 13392 { 13393 if (ELF32_R_TYPE (irel_ptr->irel->r_info) == R_NDS32_TRAN) 13394 { 13395 /* Ex9 already. */ 13396 ptr->ex9_enable = 0; 13397 break; 13398 } 13399 irel_ptr = irel_ptr->next; 13400 } 13401 } 13402 ptr = ptr->next; 13403 } 13404} 13405 13406/* Wrapper to do ifc relaxation. */ 13407 13408bfd_boolean 13409nds32_elf_ifc_finish (struct bfd_link_info *info) 13410{ 13411 int relax_status; 13412 struct elf_nds32_link_hash_table *table; 13413 13414 table = nds32_elf_hash_table (info); 13415 relax_status = table->relax_status; 13416 13417 if (!(relax_status & NDS32_RELAX_JUMP_IFC_DONE)) 13418 nds32_elf_ifc_filter (info); 13419 else 13420 nds32_elf_ifc_filter_after_ex9 (); 13421 13422 if (!nds32_elf_ifc_replace (info)) 13423 return FALSE; 13424 13425 if (table) 13426 table->relax_status |= NDS32_RELAX_JUMP_IFC_DONE; 13427 return TRUE; 13428} 13429 13430/* Traverse the result of ifc filter and replace it with ifcall9. */ 13431 13432static bfd_boolean 13433nds32_elf_ifc_replace (struct bfd_link_info *info) 13434{ 13435 struct elf_nds32_ifc_symbol_entry *ptr = ifc_symbol_head; 13436 struct elf_nds32_ifc_irel_list *irel_ptr = NULL; 13437 nds32_elf_blank_t *relax_blank_list = NULL; 13438 bfd_byte *contents = NULL; 13439 Elf_Internal_Rela *internal_relocs; 13440 Elf_Internal_Rela *irel; 13441 Elf_Internal_Rela *irelend; 13442 unsigned short insn16 = INSN_IFCALL9; 13443 struct elf_nds32_link_hash_table *table; 13444 int relax_status; 13445 13446 table = nds32_elf_hash_table (info); 13447 relax_status = table->relax_status; 13448 13449 while (ptr) 13450 { 13451 /* Traverse the ifc gather list, and replace the 13452 filter entries by ifcall9. */ 13453 if ((!(relax_status & NDS32_RELAX_JUMP_IFC_DONE) && ptr->enable == 1) 13454 || ((relax_status & NDS32_RELAX_JUMP_IFC_DONE) 13455 && ptr->ex9_enable == 1)) 13456 { 13457 irel_ptr = ptr->irel_head; 13458 if (ptr->h == NULL) 13459 { 13460 /* Local symbol. */ 13461 internal_relocs = _bfd_elf_link_read_relocs 13462 (ptr->sec->owner, ptr->sec, NULL, NULL, TRUE /* keep_memory */); 13463 irelend = internal_relocs + ptr->sec->reloc_count; 13464 13465 if (!nds32_get_section_contents (ptr->sec->owner, ptr->sec, 13466 &contents)) 13467 return FALSE; 13468 13469 while (irel_ptr) 13470 { 13471 if (irel_ptr->keep == 0 && irel_ptr->next) 13472 { 13473 /* The one can be replaced. We have to check whether 13474 there is any alignment point in the region. */ 13475 irel = irel_ptr->irel; 13476 while (((irel_ptr->next->keep == 0 13477 && irel < irel_ptr->next->irel) 13478 || (irel_ptr->next->keep == 1 && irel < irelend)) 13479 && !(ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 13480 && (irel->r_addend & 0x1f) == 2)) 13481 irel++; 13482 if (irel >= irelend 13483 || !(ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 13484 && (irel->r_addend & 0x1f) == 2 13485 && ((irel->r_offset - get_nds32_elf_blank_total 13486 (&relax_blank_list, irel->r_offset, 1)) 13487 & 0x02) == 0)) 13488 { 13489 /* Replace by ifcall9. */ 13490 bfd_putb16 (insn16, contents + irel_ptr->irel->r_offset); 13491 if (!insert_nds32_elf_blank_recalc_total 13492 (&relax_blank_list, irel_ptr->irel->r_offset + 2, 2)) 13493 return FALSE; 13494 irel_ptr->irel->r_info = 13495 ELF32_R_INFO (ELF32_R_SYM (irel_ptr->irel->r_info), 13496 R_NDS32_10IFCU_PCREL_RELA); 13497 } 13498 } 13499 irel_ptr = irel_ptr->next; 13500 } 13501 13502 /* Delete the redundant code. */ 13503 if (relax_blank_list) 13504 { 13505 nds32_elf_relax_delete_blanks (ptr->sec->owner, ptr->sec, 13506 relax_blank_list); 13507 relax_blank_list = NULL; 13508 } 13509 } 13510 else 13511 { 13512 /* Global symbol. */ 13513 while (irel_ptr) 13514 { 13515 if (irel_ptr->keep == 0 && irel_ptr->next) 13516 { 13517 /* The one can be replaced, and we have to check 13518 whether there is any alignment point in the region. */ 13519 internal_relocs = _bfd_elf_link_read_relocs 13520 (irel_ptr->sec->owner, irel_ptr->sec, NULL, NULL, 13521 TRUE /* keep_memory */); 13522 irelend = internal_relocs + irel_ptr->sec->reloc_count; 13523 if (!nds32_get_section_contents 13524 (irel_ptr->sec->owner, irel_ptr->sec, &contents)) 13525 return FALSE; 13526 13527 irel = irel_ptr->irel; 13528 while (((irel_ptr->sec == irel_ptr->next->sec 13529 && irel_ptr->next->keep == 0 13530 && irel < irel_ptr->next->irel) 13531 || ((irel_ptr->sec != irel_ptr->next->sec 13532 || irel_ptr->next->keep == 1) 13533 && irel < irelend)) 13534 && !(ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 13535 && (irel->r_addend & 0x1f) == 2)) 13536 irel++; 13537 if (irel >= irelend 13538 || !(ELF32_R_TYPE (irel->r_info) == R_NDS32_LABEL 13539 && (irel->r_addend & 0x1f) == 2 13540 && ((irel->r_offset 13541 - get_nds32_elf_blank_total (&relax_blank_list, 13542 irel->r_offset, 1)) & 0x02) == 0)) 13543 { 13544 /* Replace by ifcall9. */ 13545 bfd_putb16 (insn16, contents + irel_ptr->irel->r_offset); 13546 if (!insert_nds32_elf_blank_recalc_total 13547 (&relax_blank_list, irel_ptr->irel->r_offset + 2, 2)) 13548 return FALSE; 13549 13550 /* Delete the redundant code, and clear the relocation. */ 13551 nds32_elf_relax_delete_blanks (irel_ptr->sec->owner, 13552 irel_ptr->sec, 13553 relax_blank_list); 13554 irel_ptr->irel->r_info = 13555 ELF32_R_INFO (ELF32_R_SYM (irel_ptr->irel->r_info), 13556 R_NDS32_10IFCU_PCREL_RELA); 13557 relax_blank_list = NULL; 13558 } 13559 } 13560 13561 irel_ptr = irel_ptr->next; 13562 } 13563 } 13564 } 13565 ptr = ptr->next; 13566 } 13567 13568 return TRUE; 13569} 13570 13571/* Relocate ifcall. */ 13572 13573static bfd_boolean 13574nds32_elf_ifc_reloc (void) 13575{ 13576 struct elf_nds32_ifc_symbol_entry *ptr = ifc_symbol_head; 13577 struct elf_nds32_ifc_irel_list *irel_ptr = NULL; 13578 struct elf_nds32_ifc_irel_list *irel_keeper = NULL; 13579 bfd_vma relocation, address; 13580 unsigned short insn16; 13581 bfd_byte *contents = NULL; 13582 static bfd_boolean done = FALSE; 13583 13584 if (done) 13585 return TRUE; 13586 13587 done = TRUE; 13588 13589 while (ptr) 13590 { 13591 /* Check the entry is enable ifcall. */ 13592 if (ptr->enable == 1 || ptr->ex9_enable == 1) 13593 { 13594 /* Get the reserve jump. */ 13595 irel_ptr = ptr->irel_head; 13596 while (irel_ptr) 13597 { 13598 if (irel_ptr->keep == 1) 13599 { 13600 irel_keeper = irel_ptr; 13601 break; 13602 } 13603 irel_ptr = irel_ptr->next; 13604 } 13605 13606 irel_ptr = ptr->irel_head; 13607 if (ptr->h == NULL) 13608 { 13609 /* Local symbol. */ 13610 if (!nds32_get_section_contents (ptr->sec->owner, ptr->sec, &contents)) 13611 return FALSE; 13612 13613 while (irel_ptr) 13614 { 13615 if (irel_ptr->keep == 0 13616 && ELF32_R_TYPE (irel_ptr->irel->r_info) == R_NDS32_10IFCU_PCREL_RELA) 13617 { 13618 relocation = irel_keeper->irel->r_offset; 13619 relocation = relocation - irel_ptr->irel->r_offset; 13620 while (irel_keeper && relocation > 1022) 13621 { 13622 irel_keeper = irel_keeper->next; 13623 if (irel_keeper && irel_keeper->keep == 1) 13624 { 13625 relocation = irel_keeper->irel->r_offset; 13626 relocation = relocation - irel_ptr->irel->r_offset; 13627 } 13628 } 13629 if (relocation > 1022) 13630 { 13631 /* Double check. */ 13632 irel_keeper = ptr->irel_head; 13633 while (irel_keeper) 13634 { 13635 if (irel_keeper->keep == 1) 13636 { 13637 relocation = irel_keeper->irel->r_offset; 13638 relocation = relocation - irel_ptr->irel->r_offset; 13639 } 13640 if (relocation <= 1022) 13641 break; 13642 irel_keeper = irel_keeper->next; 13643 } 13644 if (!irel_keeper) 13645 return FALSE; 13646 } 13647 irel_ptr->irel->r_info = 13648 ELF32_R_INFO (ELF32_R_SYM (irel_ptr->irel->r_info), 13649 R_NDS32_NONE); 13650 insn16 = INSN_IFCALL9 | (relocation >> 1); 13651 bfd_putb16 (insn16, contents + irel_ptr->irel->r_offset); 13652 } 13653 irel_ptr = irel_ptr->next; 13654 } 13655 } 13656 else 13657 { 13658 /* Global symbol. */ 13659 while (irel_ptr) 13660 { 13661 if (irel_ptr->keep == 0 13662 && ELF32_R_TYPE (irel_ptr->irel->r_info) == R_NDS32_10IFCU_PCREL_RELA) 13663 { 13664 /* Get the distance between ifcall and jump. */ 13665 relocation = (irel_keeper->irel->r_offset 13666 + irel_keeper->sec->output_section->vma 13667 + irel_keeper->sec->output_offset); 13668 address = (irel_ptr->irel->r_offset 13669 + irel_ptr->sec->output_section->vma 13670 + irel_ptr->sec->output_offset); 13671 relocation = relocation - address; 13672 13673 /* The distance is over ragne, find callee again. */ 13674 while (irel_keeper && relocation > 1022) 13675 { 13676 irel_keeper = irel_keeper->next; 13677 if (irel_keeper && irel_keeper->keep ==1) 13678 { 13679 relocation = (irel_keeper->irel->r_offset 13680 + irel_keeper->sec->output_section->vma 13681 + irel_keeper->sec->output_offset); 13682 relocation = relocation - address; 13683 } 13684 } 13685 13686 if (relocation > 1022) 13687 { 13688 /* Double check. */ 13689 irel_keeper = ptr->irel_head; 13690 while (irel_keeper) 13691 { 13692 if (irel_keeper->keep == 1) 13693 { 13694 13695 relocation = (irel_keeper->irel->r_offset 13696 + irel_keeper->sec->output_section->vma 13697 + irel_keeper->sec->output_offset); 13698 relocation = relocation - address; 13699 } 13700 if (relocation <= 1022) 13701 break; 13702 irel_keeper = irel_keeper->next; 13703 } 13704 if (!irel_keeper) 13705 return FALSE; 13706 } 13707 if (!nds32_get_section_contents 13708 (irel_ptr->sec->owner, irel_ptr->sec, &contents)) 13709 return FALSE; 13710 insn16 = INSN_IFCALL9 | (relocation >> 1); 13711 bfd_putb16 (insn16, contents + irel_ptr->irel->r_offset); 13712 irel_ptr->irel->r_info = 13713 ELF32_R_INFO (ELF32_R_SYM (irel_ptr->irel->r_info), 13714 R_NDS32_NONE); 13715 } 13716 irel_ptr =irel_ptr->next; 13717 } 13718 } 13719 } 13720 ptr = ptr->next; 13721 } 13722 13723 return TRUE; 13724} 13725 13726/* End of IFC relaxation. */ 13727 13728/* EX9 Instruction Table Relaxation. */ 13729 13730/* Global hash list. */ 13731struct elf_link_hash_entry_list 13732{ 13733 struct elf_link_hash_entry *h; 13734 struct elf_link_hash_entry_list *next; 13735}; 13736 13737/* Save different destination but same insn. */ 13738struct elf_link_hash_entry_mul_list 13739{ 13740 /* Global symbol times. */ 13741 int times; 13742 /* Save relocation for each global symbol but useful?? */ 13743 Elf_Internal_Rela *irel; 13744 /* For sethi, two sethi may have the same high-part but different low-parts. */ 13745 Elf_Internal_Rela rel_backup; 13746 struct elf_link_hash_entry_list *h_list; 13747 struct elf_link_hash_entry_mul_list *next; 13748}; 13749 13750/* Instruction hash table. */ 13751struct elf_nds32_code_hash_entry 13752{ 13753 struct bfd_hash_entry root; 13754 int times; 13755 /* For insn that can use relocation or constant ex: sethi. */ 13756 int const_insn; 13757 asection *sec; 13758 struct elf_link_hash_entry_mul_list *m_list; 13759 /* Using r_addend. */ 13760 Elf_Internal_Rela *irel; 13761 /* Using r_info. */ 13762 Elf_Internal_Rela rel_backup; 13763}; 13764 13765/* Instruction count list. */ 13766struct elf_nds32_insn_times_entry 13767{ 13768 const char *string; 13769 int times; 13770 int order; 13771 asection *sec; 13772 struct elf_link_hash_entry_mul_list *m_list; 13773 Elf_Internal_Rela *irel; 13774 Elf_Internal_Rela rel_backup; 13775 struct elf_nds32_insn_times_entry *next; 13776}; 13777 13778/* J and JAL symbol list. */ 13779struct elf_nds32_symbol_entry 13780{ 13781 char *string; 13782 unsigned long insn; 13783 struct elf_nds32_symbol_entry *next; 13784}; 13785 13786/* Relocation list. */ 13787struct elf_nds32_irel_entry 13788{ 13789 Elf_Internal_Rela *irel; 13790 struct elf_nds32_irel_entry *next; 13791}; 13792 13793/* ex9.it insn need to be fixed. */ 13794struct elf_nds32_ex9_refix 13795{ 13796 Elf_Internal_Rela *irel; 13797 asection *sec; 13798 struct elf_link_hash_entry *h; 13799 int order; 13800 struct elf_nds32_ex9_refix *next; 13801}; 13802 13803static struct bfd_hash_table ex9_code_table; 13804static struct elf_nds32_insn_times_entry *ex9_insn_head = NULL; 13805static struct elf_nds32_ex9_refix *ex9_refix_head = NULL; 13806 13807/* EX9 hash function. */ 13808 13809static struct bfd_hash_entry * 13810nds32_elf_code_hash_newfunc (struct bfd_hash_entry *entry, 13811 struct bfd_hash_table *table, 13812 const char *string) 13813{ 13814 struct elf_nds32_code_hash_entry *ret; 13815 13816 /* Allocate the structure if it has not already been allocated by a 13817 subclass. */ 13818 if (entry == NULL) 13819 { 13820 entry = (struct bfd_hash_entry *) 13821 bfd_hash_allocate (table, sizeof (*ret)); 13822 if (entry == NULL) 13823 return entry; 13824 } 13825 13826 /* Call the allocation method of the superclass. */ 13827 entry = bfd_hash_newfunc (entry, table, string); 13828 if (entry == NULL) 13829 return entry; 13830 13831 ret = (struct elf_nds32_code_hash_entry*) entry; 13832 ret->times = 0; 13833 ret->const_insn = 0; 13834 ret->m_list = NULL; 13835 ret->sec = NULL; 13836 ret->irel = NULL; 13837 return &ret->root; 13838} 13839 13840/* Insert ex9 entry 13841 this insert must be stable sorted by times. */ 13842 13843static void 13844nds32_elf_ex9_insert_entry (struct elf_nds32_insn_times_entry *ptr) 13845{ 13846 struct elf_nds32_insn_times_entry *temp; 13847 struct elf_nds32_insn_times_entry *temp2; 13848 13849 if (ex9_insn_head == NULL) 13850 { 13851 ex9_insn_head = ptr; 13852 ptr->next = NULL; 13853 } 13854 else 13855 { 13856 temp = ex9_insn_head; 13857 temp2 = ex9_insn_head; 13858 while (temp->next && 13859 (temp->next->times >= ptr->times 13860 || temp->times == -1)) 13861 { 13862 if (temp->times == -1) 13863 temp2 = temp; 13864 temp = temp->next; 13865 } 13866 if (ptr->times > temp->times && temp->times != -1) 13867 { 13868 ptr->next = temp; 13869 if (temp2->times == -1) 13870 temp2->next = ptr; 13871 else 13872 ex9_insn_head = ptr; 13873 } 13874 else if (temp->next == NULL) 13875 { 13876 temp->next = ptr; 13877 ptr->next = NULL; 13878 } 13879 else 13880 { 13881 ptr->next = temp->next; 13882 temp->next = ptr; 13883 } 13884 } 13885} 13886 13887/* Examine each insn times in hash table. 13888 Handle multi-link hash entry. 13889 13890 TODO: This function doesn't assign so much info since it is fake. */ 13891 13892static int 13893nds32_elf_examine_insn_times (struct elf_nds32_code_hash_entry *h) 13894{ 13895 struct elf_nds32_insn_times_entry *ptr; 13896 int times; 13897 13898 if (h->m_list == NULL) 13899 { 13900 /* Local symbol insn or insn without relocation. */ 13901 if (h->times < 3) 13902 return TRUE; 13903 13904 ptr = (struct elf_nds32_insn_times_entry *) 13905 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 13906 ptr->times = h->times; 13907 ptr->string = h->root.string; 13908 ptr->m_list = NULL; 13909 ptr->sec = h->sec; 13910 ptr->irel = h->irel; 13911 ptr->rel_backup = h->rel_backup; 13912 nds32_elf_ex9_insert_entry (ptr); 13913 } 13914 else 13915 { 13916 /* Global symbol insn. */ 13917 /* Only sethi insn has multiple m_list. */ 13918 struct elf_link_hash_entry_mul_list *m_list = h->m_list; 13919 13920 times = 0; 13921 while (m_list) 13922 { 13923 times += m_list->times; 13924 m_list = m_list->next; 13925 } 13926 if (times >= 3) 13927 { 13928 m_list = h->m_list; 13929 ptr = (struct elf_nds32_insn_times_entry *) 13930 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 13931 ptr->times = times; /* Use the total times. */ 13932 ptr->string = h->root.string; 13933 ptr->m_list = m_list; 13934 ptr->sec = h->sec; 13935 ptr->irel = m_list->irel; 13936 ptr->rel_backup = m_list->rel_backup; 13937 nds32_elf_ex9_insert_entry (ptr); 13938 } 13939 if (h->const_insn == 1) 13940 { 13941 /* sethi with constant value. */ 13942 if (h->times < 3) 13943 return TRUE; 13944 13945 ptr = (struct elf_nds32_insn_times_entry *) 13946 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 13947 ptr->times = h->times; 13948 ptr->string = h->root.string; 13949 ptr->m_list = NULL; 13950 ptr->sec = NULL; 13951 ptr->irel = NULL; 13952 ptr->rel_backup = h->rel_backup; 13953 nds32_elf_ex9_insert_entry (ptr); 13954 } 13955 } 13956 return TRUE; 13957} 13958 13959/* Count each insn times in hash table. 13960 Handle multi-link hash entry. */ 13961 13962static int 13963nds32_elf_count_insn_times (struct elf_nds32_code_hash_entry *h) 13964{ 13965 int reservation, times; 13966 unsigned long relocation, min_relocation; 13967 struct elf_nds32_insn_times_entry *ptr; 13968 13969 if (h->m_list == NULL) 13970 { 13971 /* Local symbol insn or insn without relocation. */ 13972 if (h->times < 3) 13973 return TRUE; 13974 ptr = (struct elf_nds32_insn_times_entry *) 13975 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 13976 ptr->times = h->times; 13977 ptr->string = h->root.string; 13978 ptr->m_list = NULL; 13979 ptr->sec = h->sec; 13980 ptr->irel = h->irel; 13981 ptr->rel_backup = h->rel_backup; 13982 nds32_elf_ex9_insert_entry (ptr); 13983 } 13984 else 13985 { 13986 /* Global symbol insn. */ 13987 /* Only sethi insn has multiple m_list. */ 13988 struct elf_link_hash_entry_mul_list *m_list = h->m_list; 13989 13990 if (ELF32_R_TYPE (m_list->rel_backup.r_info) == R_NDS32_HI20_RELA 13991 && m_list->next != NULL) 13992 { 13993 /* Sethi insn has different symbol or addend but has same hi20. */ 13994 times = 0; 13995 reservation = 1; 13996 relocation = 0; 13997 min_relocation = 0xffffffff; 13998 while (m_list) 13999 { 14000 /* Get the minimum sethi address 14001 and calculate how many entry the sethi-list have to use. */ 14002 if ((m_list->h_list->h->root.type == bfd_link_hash_defined 14003 || m_list->h_list->h->root.type == bfd_link_hash_defweak) 14004 && (m_list->h_list->h->root.u.def.section != NULL 14005 && m_list->h_list->h->root.u.def.section->output_section != NULL)) 14006 { 14007 relocation = (m_list->h_list->h->root.u.def.value + 14008 m_list->h_list->h->root.u.def.section->output_section->vma + 14009 m_list->h_list->h->root.u.def.section->output_offset); 14010 relocation += m_list->irel->r_addend; 14011 } 14012 else 14013 relocation = 0; 14014 if (relocation < min_relocation) 14015 min_relocation = relocation; 14016 times += m_list->times; 14017 m_list = m_list->next; 14018 } 14019 if (min_relocation < ex9_relax_size) 14020 reservation = (min_relocation >> 12) + 1; 14021 else 14022 reservation = (min_relocation >> 12) 14023 - ((min_relocation - ex9_relax_size) >> 12) + 1; 14024 if (reservation < (times / 3)) 14025 { 14026 /* Efficient enough to use ex9. */ 14027 int i; 14028 14029 for (i = reservation ; i > 0; i--) 14030 { 14031 /* Allocate number of reservation ex9 entry. */ 14032 ptr = (struct elf_nds32_insn_times_entry *) 14033 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 14034 ptr->times = h->m_list->times / reservation; 14035 ptr->string = h->root.string; 14036 ptr->m_list = h->m_list; 14037 ptr->sec = h->sec; 14038 ptr->irel = h->m_list->irel; 14039 ptr->rel_backup = h->m_list->rel_backup; 14040 nds32_elf_ex9_insert_entry (ptr); 14041 } 14042 } 14043 } 14044 else 14045 { 14046 /* Normal global symbol that means no different address symbol 14047 using same ex9 entry. */ 14048 if (m_list->times >= 3) 14049 { 14050 ptr = (struct elf_nds32_insn_times_entry *) 14051 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 14052 ptr->times = m_list->times; 14053 ptr->string = h->root.string; 14054 ptr->m_list = h->m_list; 14055 ptr->sec = h->sec; 14056 ptr->irel = h->m_list->irel; 14057 ptr->rel_backup = h->m_list->rel_backup; 14058 nds32_elf_ex9_insert_entry (ptr); 14059 } 14060 } 14061 14062 if (h->const_insn == 1) 14063 { 14064 /* sethi with constant value. */ 14065 if (h->times < 3) 14066 return TRUE; 14067 14068 ptr = (struct elf_nds32_insn_times_entry *) 14069 bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 14070 ptr->times = h->times; 14071 ptr->string = h->root.string; 14072 ptr->m_list = NULL; 14073 ptr->sec = NULL; 14074 ptr->irel = NULL; 14075 ptr->rel_backup = h->rel_backup; 14076 nds32_elf_ex9_insert_entry (ptr); 14077 } 14078 } 14079 14080 return TRUE; 14081} 14082 14083/* Hash table traverse function. */ 14084 14085static void 14086nds32_elf_code_hash_traverse (int (*func) (struct elf_nds32_code_hash_entry*)) 14087{ 14088 unsigned int i; 14089 14090 ex9_code_table.frozen = 1; 14091 for (i = 0; i < ex9_code_table.size; i++) 14092 { 14093 struct bfd_hash_entry *p; 14094 14095 for (p = ex9_code_table.table[i]; p != NULL; p = p->next) 14096 if (!func ((struct elf_nds32_code_hash_entry *) p)) 14097 goto out; 14098 } 14099out: 14100 ex9_code_table.frozen = 0; 14101} 14102 14103 14104/* Give order number to insn list. */ 14105 14106static void 14107nds32_elf_order_insn_times (struct bfd_link_info *info) 14108{ 14109 struct elf_nds32_insn_times_entry *ex9_insn; 14110 struct elf_nds32_insn_times_entry *temp = NULL; 14111 struct elf_nds32_link_hash_table *table; 14112 int ex9_limit; 14113 int number = 0; 14114 14115 if (ex9_insn_head == NULL) 14116 return; 14117 14118/* The max number of entries is 512. */ 14119 ex9_insn = ex9_insn_head; 14120 table = nds32_elf_hash_table (info); 14121 ex9_limit = table->ex9_limit; 14122 14123 ex9_insn = ex9_insn_head; 14124 14125 while (ex9_insn != NULL && number < ex9_limit) 14126 { 14127 ex9_insn->order = number; 14128 number++; 14129 temp = ex9_insn; 14130 ex9_insn = ex9_insn->next; 14131 } 14132 14133 if (ex9_insn && temp) 14134 temp->next = NULL; 14135 14136 while (ex9_insn != NULL) 14137 { 14138 /* Free useless entry. */ 14139 temp = ex9_insn; 14140 ex9_insn = ex9_insn->next; 14141 free (temp); 14142 } 14143} 14144 14145/* Build .ex9.itable section. */ 14146 14147static void 14148nds32_elf_ex9_build_itable (struct bfd_link_info *link_info) 14149{ 14150 asection *table_sec; 14151 struct elf_nds32_insn_times_entry *ptr; 14152 bfd *it_abfd; 14153 int number = 0; 14154 bfd_byte *contents = NULL; 14155 14156 for (it_abfd = link_info->input_bfds; it_abfd != NULL; 14157 it_abfd = it_abfd->link.next) 14158 { 14159 /* Find the section .ex9.itable, and put all entries into it. */ 14160 table_sec = bfd_get_section_by_name (it_abfd, ".ex9.itable"); 14161 if (table_sec != NULL) 14162 { 14163 if (!nds32_get_section_contents (it_abfd, table_sec, &contents)) 14164 return; 14165 14166 for (ptr = ex9_insn_head; ptr !=NULL ; ptr = ptr->next) 14167 number++; 14168 14169 table_sec->size = number * 4; 14170 14171 if (number == 0) 14172 return; 14173 14174 elf_elfheader (link_info->output_bfd)->e_flags |= E_NDS32_HAS_EX9_INST; 14175 number = 0; 14176 for (ptr = ex9_insn_head; ptr !=NULL ; ptr = ptr->next) 14177 { 14178 long val; 14179 14180 val = strtol (ptr->string, NULL, 16); 14181 bfd_putb32 ((bfd_vma) val, (char *) contents + (number * 4)); 14182 number++; 14183 } 14184 break; 14185 } 14186 } 14187} 14188 14189/* Get insn with regs according to relocation type. */ 14190 14191static void 14192nds32_elf_get_insn_with_reg (Elf_Internal_Rela *irel, 14193 uint32_t insn, uint32_t *insn_with_reg) 14194{ 14195 reloc_howto_type *howto = NULL; 14196 14197 if (irel == NULL 14198 || (ELF32_R_TYPE (irel->r_info) >= (int) ARRAY_SIZE (nds32_elf_howto_table) 14199 && (ELF32_R_TYPE (irel->r_info) - R_NDS32_RELAX_ENTRY) 14200 >= (int) ARRAY_SIZE (nds32_elf_relax_howto_table))) 14201 { 14202 *insn_with_reg = insn; 14203 return; 14204 } 14205 14206 howto = bfd_elf32_bfd_reloc_type_table_lookup (ELF32_R_TYPE (irel->r_info)); 14207 *insn_with_reg = insn & (0xffffffff ^ howto->dst_mask); 14208} 14209 14210/* Mask number of address bits according to relocation. */ 14211 14212static unsigned long 14213nds32_elf_irel_mask (Elf_Internal_Rela *irel) 14214{ 14215 reloc_howto_type *howto = NULL; 14216 14217 if (irel == NULL 14218 || (ELF32_R_TYPE (irel->r_info) >= (int) ARRAY_SIZE (nds32_elf_howto_table) 14219 && (ELF32_R_TYPE (irel->r_info) - R_NDS32_RELAX_ENTRY) 14220 >= (int) ARRAY_SIZE (nds32_elf_relax_howto_table))) 14221 return 0; 14222 14223 howto = bfd_elf32_bfd_reloc_type_table_lookup (ELF32_R_TYPE (irel->r_info)); 14224 return howto->dst_mask; 14225} 14226 14227static void 14228nds32_elf_insert_irel_entry (struct elf_nds32_irel_entry **irel_list, 14229 struct elf_nds32_irel_entry *irel_ptr) 14230{ 14231 if (*irel_list == NULL) 14232 { 14233 *irel_list = irel_ptr; 14234 irel_ptr->next = NULL; 14235 } 14236 else 14237 { 14238 irel_ptr->next = *irel_list; 14239 *irel_list = irel_ptr; 14240 } 14241} 14242 14243static void 14244nds32_elf_ex9_insert_fix (asection * sec, Elf_Internal_Rela * irel, 14245 struct elf_link_hash_entry *h, int order) 14246{ 14247 struct elf_nds32_ex9_refix *ptr; 14248 14249 ptr = bfd_malloc (sizeof (struct elf_nds32_ex9_refix)); 14250 ptr->sec = sec; 14251 ptr->irel = irel; 14252 ptr->h = h; 14253 ptr->order = order; 14254 ptr->next = NULL; 14255 14256 if (ex9_refix_head == NULL) 14257 ex9_refix_head = ptr; 14258 else 14259 { 14260 struct elf_nds32_ex9_refix *temp = ex9_refix_head; 14261 14262 while (temp->next != NULL) 14263 temp = temp->next; 14264 temp->next = ptr; 14265 } 14266} 14267 14268enum 14269{ 14270 DATA_EXIST = 1, 14271 CLEAN_PRE = 1 << 1, 14272 PUSH_PRE = 1 << 2 14273}; 14274 14275/* Check relocation type if supporting for ex9. */ 14276 14277static int 14278nds32_elf_ex9_relocation_check (struct bfd_link_info *info, 14279 Elf_Internal_Rela **irel, 14280 Elf_Internal_Rela *irelend, 14281 nds32_elf_blank_t *relax_blank_list, 14282 asection *sec,bfd_vma *off, 14283 bfd_byte *contents) 14284{ 14285 /* Suppress ex9 if `.no_relax ex9' or inner loop. */ 14286 bfd_boolean nested_ex9, nested_loop; 14287 bfd_boolean ex9_loop_aware; 14288 /* We use the highest 1 byte of result to record 14289 how many bytes location counter has to move. */ 14290 int result = 0; 14291 Elf_Internal_Rela *irel_save = NULL; 14292 struct elf_nds32_link_hash_table *table; 14293 14294 table = nds32_elf_hash_table (info); 14295 ex9_loop_aware = table->ex9_loop_aware; 14296 14297 while ((*irel) != NULL && (*irel) < irelend && *off == (*irel)->r_offset) 14298 { 14299 switch (ELF32_R_TYPE ((*irel)->r_info)) 14300 { 14301 case R_NDS32_RELAX_REGION_BEGIN: 14302 /* Ignore code block. */ 14303 nested_ex9 = FALSE; 14304 nested_loop = FALSE; 14305 if (((*irel)->r_addend & R_NDS32_RELAX_REGION_NO_EX9_FLAG) 14306 || (ex9_loop_aware 14307 && ((*irel)->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG))) 14308 { 14309 /* Check the region if loop or not. If it is true and 14310 ex9-loop-aware is true, ignore the region till region end. */ 14311 /* To save the status for in .no_relax ex9 region and 14312 loop region to conform the block can do ex9 relaxation. */ 14313 nested_ex9 = ((*irel)->r_addend & R_NDS32_RELAX_REGION_NO_EX9_FLAG); 14314 nested_loop = (ex9_loop_aware 14315 && ((*irel)->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG)); 14316 while ((*irel) && (*irel) < irelend && (nested_ex9 || nested_loop)) 14317 { 14318 (*irel)++; 14319 if (ELF32_R_TYPE ((*irel)->r_info) == R_NDS32_RELAX_REGION_BEGIN) 14320 { 14321 /* There may be nested region. */ 14322 if (((*irel)->r_addend & R_NDS32_RELAX_REGION_NO_EX9_FLAG) != 0) 14323 nested_ex9 = TRUE; 14324 else if (ex9_loop_aware 14325 && ((*irel)->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG)) 14326 nested_loop = TRUE; 14327 } 14328 else if (ELF32_R_TYPE ((*irel)->r_info) == R_NDS32_RELAX_REGION_END) 14329 { 14330 /* The end of region. */ 14331 if (((*irel)->r_addend & R_NDS32_RELAX_REGION_NO_EX9_FLAG) != 0) 14332 nested_ex9 = FALSE; 14333 else if (ex9_loop_aware 14334 && ((*irel)->r_addend & R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG)) 14335 nested_loop = FALSE; 14336 } 14337 else if (ELF32_R_TYPE ((*irel)->r_info) == R_NDS32_LABEL 14338 && ((*irel)->r_addend & 0x1f) == 2) 14339 { 14340 /* Alignment exist in the region. */ 14341 result |= CLEAN_PRE; 14342 if (((*irel)->r_offset - 14343 get_nds32_elf_blank_total (&relax_blank_list, 14344 (*irel)->r_offset, 0)) & 0x02) 14345 result |= PUSH_PRE; 14346 } 14347 } 14348 if ((*irel) >= irelend) 14349 *off = sec->size; 14350 else 14351 *off = (*irel)->r_offset; 14352 14353 /* The final instruction in the region, regard this one as data to ignore it. */ 14354 result |= DATA_EXIST; 14355 return result; 14356 } 14357 break; 14358 14359 case R_NDS32_LABEL: 14360 if (((*irel)->r_addend & 0x1f) == 2) 14361 { 14362 /* Check this point is align and decide to do ex9 or not. */ 14363 result |= CLEAN_PRE; 14364 if (((*irel)->r_offset - 14365 get_nds32_elf_blank_total (&relax_blank_list, 14366 (*irel)->r_offset, 0)) & 0x02) 14367 result |= PUSH_PRE; 14368 } 14369 break; 14370 case R_NDS32_32_RELA: 14371 /* Data. */ 14372 result |= (4 << 24); 14373 result |= DATA_EXIST; 14374 break; 14375 case R_NDS32_16_RELA: 14376 /* Data. */ 14377 result |= (2 << 24); 14378 result |= DATA_EXIST; 14379 break; 14380 case R_NDS32_DATA: 14381 /* Data. */ 14382 /* The least code alignment is 2. If the data is only one byte, 14383 we have to shift one more byte. */ 14384 if ((*irel)->r_addend == 1) 14385 result |= ((*irel)->r_addend << 25) ; 14386 else 14387 result |= ((*irel)->r_addend << 24) ; 14388 14389 result |= DATA_EXIST; 14390 break; 14391 14392 case R_NDS32_25_PCREL_RELA: 14393 case R_NDS32_SDA16S3_RELA: 14394 case R_NDS32_SDA15S3_RELA: 14395 case R_NDS32_SDA15S3: 14396 case R_NDS32_SDA17S2_RELA: 14397 case R_NDS32_SDA15S2_RELA: 14398 case R_NDS32_SDA12S2_SP_RELA: 14399 case R_NDS32_SDA12S2_DP_RELA: 14400 case R_NDS32_SDA15S2: 14401 case R_NDS32_SDA18S1_RELA: 14402 case R_NDS32_SDA15S1_RELA: 14403 case R_NDS32_SDA15S1: 14404 case R_NDS32_SDA19S0_RELA: 14405 case R_NDS32_SDA15S0_RELA: 14406 case R_NDS32_SDA15S0: 14407 case R_NDS32_HI20_RELA: 14408 case R_NDS32_LO12S0_ORI_RELA: 14409 case R_NDS32_LO12S0_RELA: 14410 case R_NDS32_LO12S1_RELA: 14411 case R_NDS32_LO12S2_RELA: 14412 /* These relocation is supported ex9 relaxation currently. */ 14413 /* We have to save the relocation for using later, since we have 14414 to check there is any alignment in the same address. */ 14415 irel_save = *irel; 14416 break; 14417 default: 14418 /* Not support relocations. */ 14419 if (ELF32_R_TYPE ((*irel)->r_info) < ARRAY_SIZE (nds32_elf_howto_table) 14420 && ELF32_R_TYPE ((*irel)->r_info) != R_NDS32_NONE 14421 && ELF32_R_TYPE ((*irel)->r_info) != R_NDS32_INSN16) 14422 { 14423 /* Note: To optimize aggressively, it maybe can ignore R_NDS32_INSN16 here. 14424 But we have to consider if there is any side-effect. */ 14425 if (!(result & DATA_EXIST)) 14426 { 14427 /* We have to confirm there is no data relocation in the 14428 same address. In general case, this won't happen. */ 14429 /* We have to do ex9 conservative, for those relocation not 14430 considerd we ignore instruction. */ 14431 result |= DATA_EXIST; 14432 if (*(contents + *off) & 0x80) 14433 result |= (2 << 24); 14434 else 14435 result |= (4 << 24); 14436 break; 14437 } 14438 } 14439 } 14440 if ((*irel) < irelend 14441 && ((*irel) + 1) < irelend 14442 && (*irel)->r_offset == ((*irel) + 1)->r_offset) 14443 /* There are relocations pointing to the same address, we have to 14444 check all of them. */ 14445 (*irel)++; 14446 else 14447 { 14448 if (irel_save) 14449 *irel = irel_save; 14450 return result; 14451 } 14452 } 14453 return result; 14454} 14455 14456/* Replace with ex9 instruction. */ 14457 14458static bfd_boolean 14459nds32_elf_ex9_push_insn (uint16_t insn16, bfd_byte *contents, bfd_vma pre_off, 14460 nds32_elf_blank_t **relax_blank_list, 14461 struct elf_nds32_irel_entry *pre_irel_ptr, 14462 struct elf_nds32_irel_entry **irel_list) 14463{ 14464 if (insn16 != 0) 14465 { 14466 /* Implement the ex9 relaxation. */ 14467 bfd_putb16 (insn16, contents + pre_off); 14468 if (!insert_nds32_elf_blank_recalc_total (relax_blank_list, 14469 pre_off + 2, 2)) 14470 return FALSE; 14471 if (pre_irel_ptr != NULL) 14472 nds32_elf_insert_irel_entry (irel_list, pre_irel_ptr); 14473 } 14474 return TRUE; 14475} 14476 14477/* Replace input file instruction which is in ex9 itable. */ 14478 14479static bfd_boolean 14480nds32_elf_ex9_replace_instruction (struct bfd_link_info *info, bfd *abfd, asection *sec) 14481{ 14482 struct elf_nds32_insn_times_entry *ex9_insn = ex9_insn_head; 14483 bfd_byte *contents = NULL; 14484 bfd_vma off; 14485 uint16_t insn16, insn_ex9; 14486 /* `pre_*' are used to track previous instruction that can use ex9.it. */ 14487 bfd_vma pre_off = -1; 14488 uint16_t pre_insn16 = 0; 14489 struct elf_nds32_irel_entry *pre_irel_ptr = NULL; 14490 Elf_Internal_Rela *internal_relocs; 14491 Elf_Internal_Rela *irel; 14492 Elf_Internal_Rela *irelend; 14493 Elf_Internal_Shdr *symtab_hdr; 14494 Elf_Internal_Sym *isym = NULL; 14495 nds32_elf_blank_t *relax_blank_list = NULL; 14496 uint32_t insn = 0; 14497 uint32_t insn_with_reg = 0; 14498 uint32_t it_insn; 14499 uint32_t it_insn_with_reg; 14500 unsigned long r_symndx; 14501 asection *isec; 14502 struct elf_nds32_irel_entry *irel_list = NULL; 14503 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (abfd); 14504 int data_flag, do_replace, save_irel; 14505 struct elf_link_hash_entry_list *h_list; 14506 14507 14508 /* Load section instructions, relocations, and symbol table. */ 14509 if (!nds32_get_section_contents (abfd, sec, &contents) 14510 || !nds32_get_local_syms (abfd, sec, &isym)) 14511 return FALSE; 14512 internal_relocs = 14513 _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, TRUE /* keep_memory */); 14514 irelend = internal_relocs + sec->reloc_count; 14515 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 14516 14517 off = 0; 14518 14519 /* Check if the object enable ex9. */ 14520 irel = find_relocs_at_address (internal_relocs, internal_relocs, 14521 irelend, R_NDS32_RELAX_ENTRY); 14522 14523 /* Check this section trigger ex9 relaxation. */ 14524 if (irel == NULL 14525 || irel >= irelend 14526 || ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_ENTRY 14527 || (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_ENTRY 14528 && !(irel->r_addend & R_NDS32_RELAX_ENTRY_EX9_FLAG))) 14529 return TRUE; 14530 14531 irel = internal_relocs; 14532 14533 /* Check alignment and fetch proper relocation. */ 14534 while (off < sec->size) 14535 { 14536 struct elf_link_hash_entry *h = NULL; 14537 struct elf_nds32_irel_entry *irel_ptr = NULL; 14538 14539 /* Syn the instruction and the relocation. */ 14540 while (irel != NULL && irel < irelend && irel->r_offset < off) 14541 irel++; 14542 14543 data_flag = nds32_elf_ex9_relocation_check (info, &irel, irelend, 14544 relax_blank_list, sec, 14545 &off, contents); 14546 if (data_flag & PUSH_PRE) 14547 if (!nds32_elf_ex9_push_insn (pre_insn16, contents, pre_off, 14548 &relax_blank_list, pre_irel_ptr, 14549 &irel_list)) 14550 return FALSE; 14551 14552 if (data_flag & CLEAN_PRE) 14553 { 14554 pre_off = 0; 14555 pre_insn16 = 0; 14556 pre_irel_ptr = NULL; 14557 } 14558 if (data_flag & DATA_EXIST) 14559 { 14560 /* We save the move offset in the highest byte. */ 14561 off += (data_flag >> 24); 14562 continue; 14563 } 14564 14565 if (*(contents + off) & 0x80) 14566 { 14567 /* 2-byte instruction. */ 14568 off += 2; 14569 continue; 14570 } 14571 14572 /* Load the instruction and its opcode with register for comparing. */ 14573 ex9_insn = ex9_insn_head; 14574 insn = bfd_getb32 (contents + off); 14575 insn_with_reg = 0; 14576 while (ex9_insn) 14577 { 14578 it_insn = strtol (ex9_insn->string, NULL, 16); 14579 it_insn_with_reg = 0; 14580 do_replace = 0; 14581 save_irel = 0; 14582 14583 if (irel != NULL && irel < irelend && irel->r_offset == off) 14584 { 14585 /* Insn with relocation. */ 14586 nds32_elf_get_insn_with_reg (irel, insn, &insn_with_reg); 14587 14588 if (ex9_insn->irel != NULL) 14589 nds32_elf_get_insn_with_reg (ex9_insn->irel, it_insn, 14590 &it_insn_with_reg); 14591 14592 if (ex9_insn->irel != NULL 14593 && (ELF32_R_TYPE (irel->r_info) == 14594 ELF32_R_TYPE (ex9_insn->irel->r_info)) 14595 && (insn_with_reg == it_insn_with_reg)) 14596 { 14597 /* Insn relocation and format is the same as table entry. */ 14598 14599 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_25_PCREL_RELA 14600 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S0_ORI_RELA 14601 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S0_RELA 14602 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S1_RELA 14603 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S2_RELA 14604 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3 14605 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0) 14606 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3_RELA 14607 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0_RELA) 14608 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA12S2_DP_RELA 14609 && ELF32_R_TYPE (irel->r_info) <= 14610 R_NDS32_SDA12S2_SP_RELA) 14611 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA16S3_RELA 14612 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA19S0_RELA)) 14613 { 14614 r_symndx = ELF32_R_SYM (irel->r_info); 14615 if (r_symndx < symtab_hdr->sh_info) 14616 { 14617 /* Local symbol. */ 14618 int shndx = isym[r_symndx].st_shndx; 14619 14620 isec = elf_elfsections (abfd)[shndx]->bfd_section; 14621 if (ex9_insn->sec == isec 14622 && ex9_insn->irel->r_addend == irel->r_addend 14623 && ex9_insn->irel->r_info == irel->r_info) 14624 { 14625 do_replace = 1; 14626 save_irel = 1; 14627 } 14628 } 14629 else 14630 { 14631 /* External symbol. */ 14632 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 14633 if (ex9_insn->m_list) 14634 { 14635 h_list = ex9_insn->m_list->h_list; 14636 while (h_list) 14637 { 14638 if (h == h_list->h 14639 && (ex9_insn->m_list->irel->r_addend == 14640 irel->r_addend)) 14641 { 14642 do_replace = 1; 14643 save_irel = 1; 14644 break; 14645 } 14646 h_list = h_list->next; 14647 } 14648 } 14649 } 14650 } 14651 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_HI20_RELA) 14652 { 14653 r_symndx = ELF32_R_SYM (irel->r_info); 14654 if (r_symndx < symtab_hdr->sh_info) 14655 { 14656 /* Local symbols. Compare its base symbol and offset. */ 14657 int shndx = isym[r_symndx].st_shndx; 14658 14659 isec = elf_elfsections (abfd)[shndx]->bfd_section; 14660 if (ex9_insn->sec == isec 14661 && ex9_insn->irel->r_addend == irel->r_addend 14662 && ex9_insn->irel->r_info == irel->r_info) 14663 { 14664 do_replace = 1; 14665 save_irel = 1; 14666 } 14667 } 14668 else 14669 { 14670 /* External symbol. */ 14671 struct elf_link_hash_entry_mul_list *m_list; 14672 14673 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 14674 m_list = ex9_insn->m_list; 14675 14676 while (m_list) 14677 { 14678 h_list = m_list->h_list; 14679 14680 while (h_list) 14681 { 14682 if (h == h_list->h 14683 && (m_list->irel->r_addend 14684 == irel->r_addend)) 14685 { 14686 do_replace = 1; 14687 save_irel = 1; 14688 if (ex9_insn->next 14689 && ex9_insn->m_list 14690 && ex9_insn->m_list == ex9_insn->next->m_list) 14691 { 14692 /* sethi multiple entry must be fixed */ 14693 nds32_elf_ex9_insert_fix (sec, irel, 14694 h, ex9_insn->order); 14695 } 14696 break; 14697 } 14698 h_list = h_list->next; 14699 } 14700 m_list = m_list->next; 14701 } 14702 } 14703 } 14704 } 14705 14706 /* Import table: Check the symbol hash table and the 14707 jump target. Only R_NDS32_25_PCREL_RELA now. */ 14708 else if (ex9_insn->times == -1 14709 && ELF32_R_TYPE (irel->r_info) == R_NDS32_25_PCREL_RELA) 14710 { 14711 nds32_elf_get_insn_with_reg (irel, it_insn, &it_insn_with_reg); 14712 if (insn_with_reg == it_insn_with_reg) 14713 { 14714 char code[10]; 14715 bfd_vma relocation; 14716 14717 r_symndx = ELF32_R_SYM (irel->r_info); 14718 if (r_symndx >= symtab_hdr->sh_info) 14719 { 14720 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 14721 if ((h->root.type == bfd_link_hash_defined 14722 || h->root.type == bfd_link_hash_defweak) 14723 && h->root.u.def.section != NULL 14724 && h->root.u.def.section->output_section != NULL 14725 && h->root.u.def.section->gc_mark == 1 14726 && bfd_is_abs_section (h->root.u.def.section) 14727 && h->root.u.def.value > sec->size) 14728 { 14729 relocation = h->root.u.def.value + 14730 h->root.u.def.section->output_section->vma + 14731 h->root.u.def.section->output_offset; 14732 relocation += irel->r_addend; 14733 insn = insn_with_reg 14734 | ((relocation >> 1) & 0xffffff); 14735 snprintf (code, sizeof (code), "%08x", insn); 14736 if (strcmp (code, ex9_insn->string) == 0) 14737 { 14738 do_replace = 1; 14739 save_irel = 1; 14740 } 14741 } 14742 } 14743 } 14744 } 14745 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_BEGIN 14746 || ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_END 14747 || ELF32_R_TYPE (irel->r_info) == R_NDS32_NONE) 14748 { 14749 /* These relocations do not have to relocate contens, so it can 14750 be regard as instruction without relocation. */ 14751 if (insn == it_insn && ex9_insn->irel == NULL) 14752 do_replace = 1; 14753 } 14754 } 14755 else 14756 { 14757 /* Instruction without relocation, we only 14758 have to compare their byte code. */ 14759 if (insn == it_insn && ex9_insn->irel == NULL) 14760 do_replace = 1; 14761 } 14762 14763 /* Insntruction match so replacing the code here. */ 14764 if (do_replace == 1) 14765 { 14766 /* There are two formats of ex9 instruction. */ 14767 if (ex9_insn->order < 32) 14768 insn_ex9 = INSN_EX9_IT_2; 14769 else 14770 insn_ex9 = INSN_EX9_IT_1; 14771 insn16 = insn_ex9 | ex9_insn->order; 14772 14773 /* Insert ex9 instruction. */ 14774 nds32_elf_ex9_push_insn (pre_insn16, contents, pre_off, 14775 &relax_blank_list, pre_irel_ptr, 14776 &irel_list); 14777 pre_off = off; 14778 pre_insn16 = insn16; 14779 14780 if (save_irel) 14781 { 14782 /* For instuction with relocation do relax. */ 14783 irel_ptr = (struct elf_nds32_irel_entry *) 14784 bfd_malloc (sizeof (struct elf_nds32_irel_entry)); 14785 irel_ptr->irel = irel; 14786 irel_ptr->next = NULL; 14787 pre_irel_ptr = irel_ptr; 14788 } 14789 else 14790 pre_irel_ptr = NULL; 14791 break; 14792 } 14793 ex9_insn = ex9_insn->next; 14794 } 14795 off += 4; 14796 } 14797 14798 /* Insert ex9 instruction. */ 14799 nds32_elf_ex9_push_insn (pre_insn16, contents, pre_off, 14800 &relax_blank_list, pre_irel_ptr, 14801 &irel_list); 14802 14803 /* Delete the redundant code. */ 14804 if (relax_blank_list) 14805 { 14806 nds32_elf_relax_delete_blanks (abfd, sec, relax_blank_list); 14807 relax_blank_list = NULL; 14808 } 14809 14810 /* Clear the relocation that is replaced by ex9. */ 14811 while (irel_list) 14812 { 14813 struct elf_nds32_irel_entry *irel_ptr; 14814 14815 irel_ptr = irel_list; 14816 irel_list = irel_ptr->next; 14817 irel_ptr->irel->r_info = 14818 ELF32_R_INFO (ELF32_R_SYM (irel_ptr->irel->r_info), R_NDS32_TRAN); 14819 free (irel_ptr); 14820 } 14821 return TRUE; 14822} 14823 14824/* Initialize ex9 hash table. */ 14825 14826int 14827nds32_elf_ex9_init (void) 14828{ 14829 if (!bfd_hash_table_init_n (&ex9_code_table, nds32_elf_code_hash_newfunc, 14830 sizeof (struct elf_nds32_code_hash_entry), 14831 1023)) 14832 { 14833 (*_bfd_error_handler) (_("Linker: cannot init ex9 hash table error \n")); 14834 return FALSE; 14835 } 14836 return TRUE; 14837} 14838 14839/* Predict how many bytes will be relaxed with ex9 and ifc. */ 14840 14841static void 14842nds32_elf_ex9_total_relax (struct bfd_link_info *info) 14843{ 14844 struct elf_nds32_insn_times_entry *ex9_insn; 14845 struct elf_nds32_insn_times_entry *temp; 14846 int target_optimize; 14847 struct elf_nds32_link_hash_table *table; 14848 14849 if (ex9_insn_head == NULL) 14850 return; 14851 14852 table = nds32_elf_hash_table (info); 14853 target_optimize = table->target_optimize; 14854 ex9_insn = ex9_insn_head; 14855 while (ex9_insn) 14856 { 14857 ex9_relax_size = ex9_insn->times * 2 + ex9_relax_size; 14858 temp = ex9_insn; 14859 ex9_insn = ex9_insn->next; 14860 free (temp); 14861 } 14862 ex9_insn_head = NULL; 14863 14864 if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON)) 14865 { 14866 /* Examine ifc reduce size. */ 14867 struct elf_nds32_ifc_symbol_entry *ifc_ent = ifc_symbol_head; 14868 struct elf_nds32_ifc_irel_list *irel_ptr = NULL; 14869 int size = 0; 14870 14871 while (ifc_ent) 14872 { 14873 if (ifc_ent->enable == 0) 14874 { 14875 /* Not ifc yet. */ 14876 irel_ptr = ifc_ent->irel_head; 14877 while (irel_ptr) 14878 { 14879 size += 2; 14880 irel_ptr = irel_ptr->next; 14881 } 14882 } 14883 size -= 2; 14884 ifc_ent = ifc_ent->next; 14885 } 14886 ex9_relax_size += size; 14887 } 14888} 14889 14890/* Finish ex9 table. */ 14891 14892void 14893nds32_elf_ex9_finish (struct bfd_link_info *link_info) 14894{ 14895 nds32_elf_code_hash_traverse (nds32_elf_examine_insn_times); 14896 nds32_elf_order_insn_times (link_info); 14897 nds32_elf_ex9_total_relax (link_info); 14898 /* Traverse the hash table and count its times. */ 14899 nds32_elf_code_hash_traverse (nds32_elf_count_insn_times); 14900 nds32_elf_order_insn_times (link_info); 14901 nds32_elf_ex9_build_itable (link_info); 14902} 14903 14904/* Relocate the entries in ex9 table. */ 14905 14906static bfd_vma 14907nds32_elf_ex9_reloc_insn (struct elf_nds32_insn_times_entry *ptr, 14908 struct bfd_link_info *link_info) 14909{ 14910 Elf_Internal_Sym *isym = NULL; 14911 bfd_vma relocation = -1; 14912 struct elf_link_hash_entry *h; 14913 14914 if (ptr->m_list != NULL) 14915 { 14916 /* Global symbol. */ 14917 h = ptr->m_list->h_list->h; 14918 if ((h->root.type == bfd_link_hash_defined 14919 || h->root.type == bfd_link_hash_defweak) 14920 && h->root.u.def.section != NULL 14921 && h->root.u.def.section->output_section != NULL) 14922 { 14923 14924 relocation = h->root.u.def.value + 14925 h->root.u.def.section->output_section->vma + 14926 h->root.u.def.section->output_offset; 14927 relocation += ptr->m_list->irel->r_addend; 14928 } 14929 else 14930 relocation = 0; 14931 } 14932 else if (ptr->sec !=NULL) 14933 { 14934 /* Local symbol. */ 14935 Elf_Internal_Sym sym; 14936 asection *sec = NULL; 14937 asection isec; 14938 asection *isec_ptr = &isec; 14939 Elf_Internal_Rela irel_backup = *(ptr->irel); 14940 asection *sec_backup = ptr->sec; 14941 bfd *abfd = ptr->sec->owner; 14942 14943 if (!nds32_get_local_syms (abfd, sec, &isym)) 14944 return FALSE; 14945 isym = isym + ELF32_R_SYM (ptr->irel->r_info); 14946 14947 sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 14948 if (sec != NULL) 14949 *isec_ptr = *sec; 14950 sym = *isym; 14951 14952 /* The purpose is same as elf_link_input_bfd. */ 14953 if (isec_ptr != NULL 14954 && isec_ptr->sec_info_type == SEC_INFO_TYPE_MERGE 14955 && ELF_ST_TYPE (isym->st_info) != STT_SECTION) 14956 { 14957 sym.st_value = 14958 _bfd_merged_section_offset (ptr->sec->output_section->owner, &isec_ptr, 14959 elf_section_data (isec_ptr)->sec_info, 14960 isym->st_value); 14961 } 14962 relocation = _bfd_elf_rela_local_sym (link_info->output_bfd, &sym, 14963 &ptr->sec, ptr->irel); 14964 if (ptr->irel != NULL) 14965 relocation += ptr->irel->r_addend; 14966 14967 /* Restore origin value since there may be some insntructions that 14968 could not be replaced with ex9.it. */ 14969 *(ptr->irel) = irel_backup; 14970 ptr->sec = sec_backup; 14971 } 14972 14973 return relocation; 14974} 14975 14976/* Import ex9 table and build list. */ 14977 14978void 14979nds32_elf_ex9_import_table (struct bfd_link_info *info) 14980{ 14981 int num = 0; 14982 bfd_byte *contents; 14983 unsigned long insn; 14984 FILE *ex9_import_file; 14985 int update_ex9_table; 14986 struct elf_nds32_link_hash_table *table; 14987 14988 table = nds32_elf_hash_table (info); 14989 ex9_import_file = table->ex9_import_file; 14990 rewind (table->ex9_import_file); 14991 14992 contents = bfd_malloc (sizeof (bfd_byte) * 4); 14993 14994 /* Read instructions from the input file and build the list. */ 14995 while (!feof (ex9_import_file)) 14996 { 14997 char *code; 14998 struct elf_nds32_insn_times_entry *ptr; 14999 size_t nread; 15000 15001 nread = fread (contents, sizeof (bfd_byte) * 4, 1, ex9_import_file); 15002 /* Ignore the final byte 0x0a. */ 15003 if (nread < 1) 15004 break; 15005 insn = bfd_getb32 (contents); 15006 code = bfd_malloc (sizeof (char) * 9); 15007 snprintf (code, 9, "%08lx", insn); 15008 ptr = bfd_malloc (sizeof (struct elf_nds32_insn_times_entry)); 15009 ptr->string = code; 15010 ptr->order = num; 15011 ptr->times = -1; 15012 ptr->sec = NULL; 15013 ptr->m_list = NULL; 15014 ptr->rel_backup.r_offset = 0; 15015 ptr->rel_backup.r_info = 0; 15016 ptr->rel_backup.r_addend = 0; 15017 ptr->irel = NULL; 15018 ptr->next = NULL; 15019 nds32_elf_ex9_insert_entry (ptr); 15020 num++; 15021 } 15022 15023 update_ex9_table = table->update_ex9_table; 15024 if (update_ex9_table == 1) 15025 { 15026 /* It has to consider of sethi need to use multiple page 15027 but it not be done yet. */ 15028 nds32_elf_code_hash_traverse (nds32_elf_examine_insn_times); 15029 nds32_elf_order_insn_times (info); 15030 } 15031} 15032 15033/* Export ex9 table. */ 15034 15035static void 15036nds32_elf_ex9_export (struct bfd_link_info *info, 15037 bfd_byte *contents, int size) 15038{ 15039 FILE *ex9_export_file; 15040 struct elf_nds32_link_hash_table *table; 15041 15042 table = nds32_elf_hash_table (info); 15043 ex9_export_file = table->ex9_export_file; 15044 fwrite (contents, sizeof (bfd_byte), size, ex9_export_file); 15045 fclose (ex9_export_file); 15046} 15047 15048/* Adjust relocations of J and JAL in ex9.itable. 15049 Export ex9 table. */ 15050 15051static void 15052nds32_elf_ex9_reloc_jmp (struct bfd_link_info *link_info) 15053{ 15054 asection *table_sec = NULL; 15055 struct elf_nds32_insn_times_entry *ex9_insn = ex9_insn_head; 15056 struct elf_nds32_insn_times_entry *temp_ptr, *temp_ptr2; 15057 bfd *it_abfd; 15058 uint32_t insn, insn_with_reg, source_insn; 15059 bfd_byte *contents = NULL, *source_contents = NULL; 15060 int size = 0; 15061 bfd_vma gp; 15062 int shift, update_ex9_table, offset = 0; 15063 reloc_howto_type *howto = NULL; 15064 Elf_Internal_Rela rel_backup; 15065 unsigned short insn_ex9; 15066 struct elf_nds32_link_hash_table *table; 15067 FILE *ex9_export_file; 15068 static bfd_boolean done = FALSE; 15069 15070 if (done) 15071 return; 15072 15073 done = TRUE; 15074 15075 table = nds32_elf_hash_table (link_info); 15076 if (table) 15077 table->relax_status |= NDS32_RELAX_EX9_DONE; 15078 15079 15080 update_ex9_table = table->update_ex9_table; 15081 /* Generated ex9.itable exactly. */ 15082 if (update_ex9_table == 0) 15083 { 15084 for (it_abfd = link_info->input_bfds; it_abfd != NULL; 15085 it_abfd = it_abfd->link.next) 15086 { 15087 table_sec = bfd_get_section_by_name (it_abfd, ".ex9.itable"); 15088 if (table_sec != NULL) 15089 break; 15090 } 15091 15092 if (table_sec != NULL) 15093 { 15094 bfd *output_bfd; 15095 15096 output_bfd = table_sec->output_section->owner; 15097 nds32_elf_final_sda_base (output_bfd, link_info, &gp, FALSE); 15098 if (table_sec->size == 0) 15099 return; 15100 15101 if (!nds32_get_section_contents (it_abfd, table_sec, &contents)) 15102 return; 15103 } 15104 } 15105 else 15106 { 15107 /* Set gp. */ 15108 bfd *output_bfd; 15109 15110 output_bfd = link_info->input_bfds->sections->output_section->owner; 15111 nds32_elf_final_sda_base (output_bfd, link_info, &gp, FALSE); 15112 contents = bfd_malloc (sizeof (bfd_byte) * 2048); 15113 } 15114 15115 /* Relocate instruction. */ 15116 while (ex9_insn) 15117 { 15118 bfd_vma relocation, min_relocation = 0xffffffff; 15119 15120 insn = strtol (ex9_insn->string, NULL, 16); 15121 insn_with_reg = 0; 15122 if (ex9_insn->m_list != NULL || ex9_insn->sec != NULL) 15123 { 15124 if (ex9_insn->m_list) 15125 rel_backup = ex9_insn->m_list->rel_backup; 15126 else 15127 rel_backup = ex9_insn->rel_backup; 15128 15129 nds32_elf_get_insn_with_reg (&rel_backup, insn, &insn_with_reg); 15130 howto = 15131 bfd_elf32_bfd_reloc_type_table_lookup (ELF32_R_TYPE 15132 (rel_backup.r_info)); 15133 shift = howto->rightshift; 15134 if (ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_25_PCREL_RELA 15135 || ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_LO12S0_ORI_RELA 15136 || ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_LO12S0_RELA 15137 || ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_LO12S1_RELA 15138 || ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_LO12S2_RELA) 15139 { 15140 relocation = nds32_elf_ex9_reloc_insn (ex9_insn, link_info); 15141 insn = 15142 insn_with_reg | ((relocation >> shift) & 15143 nds32_elf_irel_mask (&rel_backup)); 15144 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15145 } 15146 else if ((ELF32_R_TYPE (rel_backup.r_info) >= R_NDS32_SDA15S3 15147 && ELF32_R_TYPE (rel_backup.r_info) <= R_NDS32_SDA15S0) 15148 || (ELF32_R_TYPE (rel_backup.r_info) >= R_NDS32_SDA15S3_RELA 15149 && ELF32_R_TYPE (rel_backup.r_info) <= R_NDS32_SDA15S0_RELA) 15150 || (ELF32_R_TYPE (rel_backup.r_info) >= R_NDS32_SDA12S2_DP_RELA 15151 && ELF32_R_TYPE (rel_backup.r_info) <= R_NDS32_SDA12S2_SP_RELA) 15152 || (ELF32_R_TYPE (rel_backup.r_info) >= R_NDS32_SDA16S3_RELA 15153 && ELF32_R_TYPE (rel_backup.r_info) <= R_NDS32_SDA19S0_RELA)) 15154 { 15155 relocation = nds32_elf_ex9_reloc_insn (ex9_insn, link_info); 15156 insn = 15157 insn_with_reg | (((relocation - gp) >> shift) & 15158 nds32_elf_irel_mask (&rel_backup)); 15159 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15160 } 15161 else if (ELF32_R_TYPE (rel_backup.r_info) == R_NDS32_HI20_RELA) 15162 { 15163 /* Sethi may be multiple entry for one insn. */ 15164 if (ex9_insn->next && ex9_insn->m_list 15165 && ex9_insn->m_list == ex9_insn->next->m_list) 15166 { 15167 struct elf_link_hash_entry_mul_list *m_list; 15168 struct elf_nds32_ex9_refix *fix_ptr; 15169 struct elf_link_hash_entry *h; 15170 15171 temp_ptr = ex9_insn; 15172 temp_ptr2 = ex9_insn; 15173 m_list = ex9_insn->m_list; 15174 while (m_list) 15175 { 15176 h = m_list->h_list->h; 15177 relocation = h->root.u.def.value + 15178 h->root.u.def.section->output_section->vma + 15179 h->root.u.def.section->output_offset; 15180 relocation += m_list->irel->r_addend; 15181 15182 if (relocation < min_relocation) 15183 min_relocation = relocation; 15184 m_list = m_list->next; 15185 } 15186 relocation = min_relocation; 15187 15188 /* Put insntruction into ex9 table. */ 15189 insn = insn_with_reg 15190 | ((relocation >> shift) & nds32_elf_irel_mask (&rel_backup)); 15191 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15192 relocation = relocation + 0x1000; /* hi20 */ 15193 15194 while (ex9_insn->next && ex9_insn->m_list 15195 && ex9_insn->m_list == ex9_insn->next->m_list) 15196 { 15197 /* Multiple sethi. */ 15198 ex9_insn = ex9_insn->next; 15199 size += 4; 15200 insn = 15201 insn_with_reg | ((relocation >> shift) & 15202 nds32_elf_irel_mask (&rel_backup)); 15203 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15204 relocation = relocation + 0x1000; /* hi20 */ 15205 } 15206 15207 fix_ptr = ex9_refix_head; 15208 while (fix_ptr) 15209 { 15210 /* Fix ex9 insn. */ 15211 /* temp_ptr2 points to the head of multiple sethi. */ 15212 temp_ptr = temp_ptr2; 15213 while (fix_ptr->order != temp_ptr->order && fix_ptr->next) 15214 { 15215 fix_ptr = fix_ptr->next; 15216 } 15217 if (fix_ptr->order != temp_ptr->order) 15218 break; 15219 15220 /* Set source insn. */ 15221 relocation = 15222 fix_ptr->h->root.u.def.value + 15223 fix_ptr->h->root.u.def.section->output_section->vma + 15224 fix_ptr->h->root.u.def.section->output_offset; 15225 relocation += fix_ptr->irel->r_addend; 15226 /* sethi imm is imm20s. */ 15227 source_insn = insn_with_reg | ((relocation >> shift) & 0xfffff); 15228 15229 while (temp_ptr) 15230 { 15231 /* Match entry and source code. */ 15232 insn = bfd_getb32 (contents + (temp_ptr->order) * 4 + offset); 15233 if (insn == source_insn) 15234 { 15235 /* Fix the ex9 insn. */ 15236 if (temp_ptr->order != fix_ptr->order) 15237 { 15238 if (!nds32_get_section_contents 15239 (fix_ptr->sec->owner, fix_ptr->sec, 15240 &source_contents)) 15241 (*_bfd_error_handler) 15242 (_("Linker: error cannot fixed ex9 relocation \n")); 15243 if (temp_ptr->order < 32) 15244 insn_ex9 = INSN_EX9_IT_2; 15245 else 15246 insn_ex9 = INSN_EX9_IT_1; 15247 insn_ex9 = insn_ex9 | temp_ptr->order; 15248 bfd_putb16 (insn_ex9, source_contents + fix_ptr->irel->r_offset); 15249 } 15250 break; 15251 } 15252 else 15253 { 15254 if (!temp_ptr->next || temp_ptr->m_list != temp_ptr->next->m_list) 15255 (*_bfd_error_handler) 15256 (_("Linker: error cannot fixed ex9 relocation \n")); 15257 else 15258 temp_ptr = temp_ptr->next; 15259 } 15260 } 15261 fix_ptr = fix_ptr->next; 15262 } 15263 } 15264 else 15265 { 15266 relocation = nds32_elf_ex9_reloc_insn (ex9_insn, link_info); 15267 insn = insn_with_reg 15268 | ((relocation >> shift) & nds32_elf_irel_mask (&rel_backup)); 15269 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15270 } 15271 } 15272 } 15273 else 15274 { 15275 /* Insn without relocation does not have to be fixed 15276 if need to update export table. */ 15277 if (update_ex9_table == 1) 15278 bfd_putb32 (insn, contents + (ex9_insn->order) * 4); 15279 } 15280 ex9_insn = ex9_insn->next; 15281 size += 4; 15282 } 15283 15284 ex9_export_file = table->ex9_export_file; 15285 if (ex9_export_file != NULL) 15286 nds32_elf_ex9_export (link_info, contents, table_sec->size); 15287 else if (update_ex9_table == 1) 15288 { 15289 table->ex9_export_file = table->ex9_import_file; 15290 rewind (table->ex9_export_file); 15291 nds32_elf_ex9_export (link_info, contents, size); 15292 } 15293} 15294 15295/* Generate ex9 hash table. */ 15296 15297static bfd_boolean 15298nds32_elf_ex9_build_hash_table (bfd *abfd, asection *sec, 15299 struct bfd_link_info *link_info) 15300{ 15301 Elf_Internal_Rela *internal_relocs; 15302 Elf_Internal_Rela *irelend; 15303 Elf_Internal_Rela *irel; 15304 Elf_Internal_Rela *jrel; 15305 Elf_Internal_Rela rel_backup; 15306 Elf_Internal_Shdr *symtab_hdr; 15307 Elf_Internal_Sym *isym = NULL; 15308 asection *isec; 15309 struct elf_link_hash_entry **sym_hashes; 15310 bfd_byte *contents = NULL; 15311 bfd_vma off = 0; 15312 unsigned long r_symndx; 15313 uint32_t insn, insn_with_reg; 15314 struct elf_link_hash_entry *h; 15315 int data_flag, shift, align; 15316 bfd_vma relocation; 15317 /* Suppress ex9 if `.no_relax ex9' or inner loop. */ 15318 reloc_howto_type *howto = NULL; 15319 15320 sym_hashes = elf_sym_hashes (abfd); 15321 /* Load section instructions, relocations, and symbol table. */ 15322 if (!nds32_get_section_contents (abfd, sec, &contents)) 15323 return FALSE; 15324 15325 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, 15326 TRUE /* keep_memory */); 15327 irelend = internal_relocs + sec->reloc_count; 15328 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 15329 if (!nds32_get_local_syms (abfd, sec, &isym)) 15330 return FALSE; 15331 15332 /* Check the object if enable ex9. */ 15333 irel = find_relocs_at_address (internal_relocs, internal_relocs, irelend, 15334 R_NDS32_RELAX_ENTRY); 15335 15336 /* Check this section trigger ex9 relaxation. */ 15337 if (irel == NULL 15338 || irel >= irelend 15339 || ELF32_R_TYPE (irel->r_info) != R_NDS32_RELAX_ENTRY 15340 || (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_ENTRY 15341 && !(irel->r_addend & R_NDS32_RELAX_ENTRY_EX9_FLAG))) 15342 return TRUE; 15343 15344 irel = internal_relocs; 15345 15346 /* Push each insn into hash table. */ 15347 while (off < sec->size) 15348 { 15349 char code[10]; 15350 struct elf_nds32_code_hash_entry *entry; 15351 15352 while (irel != NULL && irel < irelend && irel->r_offset < off) 15353 irel++; 15354 15355 data_flag = nds32_elf_ex9_relocation_check (link_info, &irel, irelend, 15356 NULL, sec, &off, contents); 15357 if (data_flag & DATA_EXIST) 15358 { 15359 /* We save the move offset in the highest byte. */ 15360 off += (data_flag >> 24); 15361 continue; 15362 } 15363 15364 if (*(contents + off) & 0x80) 15365 { 15366 off += 2; 15367 } 15368 else 15369 { 15370 h = NULL; 15371 isec = NULL; 15372 jrel = NULL; 15373 rel_backup.r_info = 0; 15374 rel_backup.r_offset = 0; 15375 rel_backup.r_addend = 0; 15376 /* Load the instruction and its opcode with register for comparing. */ 15377 insn = bfd_getb32 (contents + off); 15378 insn_with_reg = 0; 15379 if (irel != NULL && irel < irelend && irel->r_offset == off) 15380 { 15381 nds32_elf_get_insn_with_reg (irel, insn, &insn_with_reg); 15382 howto = bfd_elf32_bfd_reloc_type_table_lookup (ELF32_R_TYPE (irel->r_info)); 15383 shift = howto->rightshift; 15384 align = (1 << shift) - 1; 15385 if (ELF32_R_TYPE (irel->r_info) == R_NDS32_25_PCREL_RELA 15386 || ELF32_R_TYPE (irel->r_info) == R_NDS32_HI20_RELA 15387 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S0_ORI_RELA 15388 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S0_RELA 15389 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S1_RELA 15390 || ELF32_R_TYPE (irel->r_info) == R_NDS32_LO12S2_RELA 15391 ||(ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3 15392 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0) 15393 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3_RELA 15394 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0_RELA) 15395 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA12S2_DP_RELA 15396 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA12S2_SP_RELA) 15397 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA16S3_RELA 15398 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA19S0_RELA)) 15399 { 15400 r_symndx = ELF32_R_SYM (irel->r_info); 15401 jrel = irel; 15402 rel_backup = *irel; 15403 if (r_symndx < symtab_hdr->sh_info) 15404 { 15405 /* Local symbol. */ 15406 int shndx = isym[r_symndx].st_shndx; 15407 15408 bfd_vma st_value = (isym + r_symndx)->st_value; 15409 isec = elf_elfsections (abfd)[shndx]->bfd_section; 15410 relocation = (isec->output_section->vma + isec->output_offset 15411 + st_value + irel->r_addend); 15412 } 15413 else 15414 { 15415 /* External symbol. */ 15416 bfd_boolean warned ATTRIBUTE_UNUSED; 15417 bfd_boolean ignored ATTRIBUTE_UNUSED; 15418 bfd_boolean unresolved_reloc ATTRIBUTE_UNUSED; 15419 asection *sym_sec; 15420 15421 /* Maybe there is a better way to get h and relocation */ 15422 RELOC_FOR_GLOBAL_SYMBOL (link_info, abfd, sec, irel, 15423 r_symndx, symtab_hdr, sym_hashes, 15424 h, sym_sec, relocation, 15425 unresolved_reloc, warned, ignored); 15426 relocation += irel->r_addend; 15427 if ((h->root.type != bfd_link_hash_defined 15428 && h->root.type != bfd_link_hash_defweak) 15429 || strcmp (h->root.root.string, "_FP_BASE_") == 0) 15430 { 15431 off += 4; 15432 continue; 15433 } 15434 } 15435 15436 /* Check for gp relative instruction alignment. */ 15437 if ((ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3 15438 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0) 15439 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA15S3_RELA 15440 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA15S0_RELA) 15441 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA12S2_DP_RELA 15442 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA12S2_SP_RELA) 15443 || (ELF32_R_TYPE (irel->r_info) >= R_NDS32_SDA16S3_RELA 15444 && ELF32_R_TYPE (irel->r_info) <= R_NDS32_SDA19S0_RELA)) 15445 { 15446 bfd_vma gp; 15447 bfd *output_bfd = sec->output_section->owner; 15448 bfd_reloc_status_type r; 15449 15450 /* If the symbol is in the abs section, the out_bfd will be null. 15451 This happens when the relocation has a symbol@GOTOFF. */ 15452 r = nds32_elf_final_sda_base (output_bfd, link_info, &gp, FALSE); 15453 if (r != bfd_reloc_ok) 15454 { 15455 off += 4; 15456 continue; 15457 } 15458 15459 relocation -= gp; 15460 15461 /* Make sure alignment is correct. */ 15462 if (relocation & align) 15463 { 15464 /* Incorrect alignment. */ 15465 (*_bfd_error_handler) 15466 (_("%s: warning: unaligned small data access. " 15467 "For entry: {%d, %d, %d}, addr = 0x%x, align = 0x%x."), 15468 bfd_get_filename (abfd), irel->r_offset, 15469 irel->r_info, irel->r_addend, relocation, align); 15470 off += 4; 15471 continue; 15472 } 15473 } 15474 15475 insn = insn_with_reg 15476 | ((relocation >> shift) & nds32_elf_irel_mask (irel)); 15477 } 15478 else if (ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_BEGIN 15479 || ELF32_R_TYPE (irel->r_info) == R_NDS32_RELAX_REGION_END 15480 || ELF32_R_TYPE (irel->r_info) == R_NDS32_NONE) 15481 { 15482 /* These relocations do not have to relocate contens, so it can 15483 be regard as instruction without relocation. */ 15484 } 15485 else 15486 { 15487 off += 4; 15488 continue; 15489 } 15490 } 15491 15492 snprintf (code, sizeof (code), "%08x", insn); 15493 /* Copy "code". */ 15494 entry = (struct elf_nds32_code_hash_entry*) 15495 bfd_hash_lookup (&ex9_code_table, code, TRUE, TRUE); 15496 if (entry == NULL) 15497 { 15498 (*_bfd_error_handler) 15499 (_("%P%F: failed creating ex9.it %s hash table: %E\n"), code); 15500 return FALSE; 15501 } 15502 if (h) 15503 { 15504 if (h->root.type == bfd_link_hash_undefined) 15505 return TRUE; 15506 /* Global symbol. */ 15507 /* In order to do sethi with different symbol but same value. */ 15508 if (entry->m_list == NULL) 15509 { 15510 struct elf_link_hash_entry_mul_list *m_list_new; 15511 struct elf_link_hash_entry_list *h_list_new; 15512 15513 m_list_new = (struct elf_link_hash_entry_mul_list *) 15514 bfd_malloc (sizeof (struct elf_link_hash_entry_mul_list)); 15515 h_list_new = (struct elf_link_hash_entry_list *) 15516 bfd_malloc (sizeof (struct elf_link_hash_entry_list)); 15517 entry->m_list = m_list_new; 15518 m_list_new->h_list = h_list_new; 15519 m_list_new->rel_backup = rel_backup; 15520 m_list_new->times = 1; 15521 m_list_new->irel = jrel; 15522 m_list_new->next = NULL; 15523 h_list_new->h = h; 15524 h_list_new->next = NULL; 15525 } 15526 else 15527 { 15528 struct elf_link_hash_entry_mul_list *m_list = entry->m_list; 15529 struct elf_link_hash_entry_list *h_list; 15530 15531 while (m_list) 15532 { 15533 /* Build the different symbols that point to the same address. */ 15534 h_list = m_list->h_list; 15535 if (h_list->h->root.u.def.value == h->root.u.def.value 15536 && h_list->h->root.u.def.section->output_section->vma 15537 == h->root.u.def.section->output_section->vma 15538 && h_list->h->root.u.def.section->output_offset 15539 == h->root.u.def.section->output_offset 15540 && m_list->rel_backup.r_addend == rel_backup.r_addend) 15541 { 15542 m_list->times++; 15543 m_list->irel = jrel; 15544 while (h_list->h != h && h_list->next) 15545 h_list = h_list->next; 15546 if (h_list->h != h) 15547 { 15548 struct elf_link_hash_entry_list *h_list_new; 15549 15550 h_list_new = (struct elf_link_hash_entry_list *) 15551 bfd_malloc (sizeof (struct elf_link_hash_entry_list)); 15552 h_list->next = h_list_new; 15553 h_list_new->h = h; 15554 h_list_new->next = NULL; 15555 } 15556 break; 15557 } 15558 /* The sethi case may have different address but the 15559 hi20 is the same. */ 15560 else if (ELF32_R_TYPE (jrel->r_info) == R_NDS32_HI20_RELA 15561 && m_list->next == NULL) 15562 { 15563 struct elf_link_hash_entry_mul_list *m_list_new; 15564 struct elf_link_hash_entry_list *h_list_new; 15565 15566 m_list_new = (struct elf_link_hash_entry_mul_list *) 15567 bfd_malloc (sizeof (struct elf_link_hash_entry_mul_list)); 15568 h_list_new = (struct elf_link_hash_entry_list *) 15569 bfd_malloc (sizeof (struct elf_link_hash_entry_list)); 15570 m_list->next = m_list_new; 15571 m_list_new->h_list = h_list_new; 15572 m_list_new->rel_backup = rel_backup; 15573 m_list_new->times = 1; 15574 m_list_new->irel = jrel; 15575 m_list_new->next = NULL; 15576 h_list_new->h = h; 15577 h_list_new->next = NULL; 15578 break; 15579 } 15580 m_list = m_list->next; 15581 } 15582 if (!m_list) 15583 { 15584 off += 4; 15585 continue; 15586 } 15587 } 15588 } 15589 else 15590 { 15591 /* Local symbol and insn without relocation*/ 15592 entry->times++; 15593 entry->rel_backup = rel_backup; 15594 } 15595 15596 /* Use in sethi insn with constant and global symbol in same format. */ 15597 if (!jrel) 15598 entry->const_insn = 1; 15599 else 15600 entry->irel = jrel; 15601 entry->sec = isec; 15602 off += 4; 15603 } 15604 } 15605 return TRUE; 15606} 15607 15608/* Set the _ITB_BASE, and point it to ex9 table. */ 15609 15610bfd_boolean 15611nds32_elf_ex9_itb_base (struct bfd_link_info *link_info) 15612{ 15613 bfd *abfd; 15614 asection *sec; 15615 bfd *output_bfd = NULL; 15616 struct bfd_link_hash_entry *bh = NULL; 15617 15618 if (is_ITB_BASE_set == 1) 15619 return TRUE; 15620 15621 is_ITB_BASE_set = 1; 15622 15623 bh = bfd_link_hash_lookup (link_info->hash, "_ITB_BASE_", FALSE, FALSE, TRUE); 15624 15625 if (bh && (bh->type == bfd_link_hash_defined 15626 || bh->type == bfd_link_hash_defweak)) 15627 return TRUE; 15628 15629 for (abfd = link_info->input_bfds; abfd != NULL; 15630 abfd = abfd->link.next) 15631 { 15632 sec = bfd_get_section_by_name (abfd, ".ex9.itable"); 15633 if (sec != NULL) 15634 { 15635 output_bfd = sec->output_section->owner; 15636 break; 15637 } 15638 } 15639 if (output_bfd == NULL) 15640 { 15641 output_bfd = link_info->output_bfd; 15642 if (output_bfd->sections == NULL) 15643 return TRUE; 15644 else 15645 sec = bfd_abs_section_ptr; 15646 } 15647 bh = bfd_link_hash_lookup (link_info->hash, "_ITB_BASE_", 15648 FALSE, FALSE, TRUE); 15649 return (_bfd_generic_link_add_one_symbol 15650 (link_info, output_bfd, "_ITB_BASE_", 15651 BSF_GLOBAL | BSF_WEAK, sec, 0, 15652 (const char *) NULL, FALSE, get_elf_backend_data 15653 (output_bfd)->collect, &bh)); 15654} /* End EX9.IT */ 15655 15656 15657#define ELF_ARCH bfd_arch_nds32 15658#define ELF_MACHINE_CODE EM_NDS32 15659#define ELF_MAXPAGESIZE 0x1000 15660#define ELF_TARGET_ID NDS32_ELF_DATA 15661 15662#define TARGET_BIG_SYM nds32_elf32_be_vec 15663#define TARGET_BIG_NAME "elf32-nds32be" 15664#define TARGET_LITTLE_SYM nds32_elf32_le_vec 15665#define TARGET_LITTLE_NAME "elf32-nds32le" 15666 15667#define elf_info_to_howto nds32_info_to_howto 15668#define elf_info_to_howto_rel nds32_info_to_howto_rel 15669 15670#define bfd_elf32_bfd_link_hash_table_create nds32_elf_link_hash_table_create 15671#define bfd_elf32_bfd_merge_private_bfd_data nds32_elf_merge_private_bfd_data 15672#define bfd_elf32_bfd_print_private_bfd_data nds32_elf_print_private_bfd_data 15673#define bfd_elf32_bfd_relax_section nds32_elf_relax_section 15674#define bfd_elf32_bfd_set_private_flags nds32_elf_set_private_flags 15675 15676#define bfd_elf32_mkobject nds32_elf_mkobject 15677#define elf_backend_action_discarded nds32_elf_action_discarded 15678#define elf_backend_add_symbol_hook nds32_elf_add_symbol_hook 15679#define elf_backend_check_relocs nds32_elf_check_relocs 15680#define elf_backend_adjust_dynamic_symbol nds32_elf_adjust_dynamic_symbol 15681#define elf_backend_create_dynamic_sections nds32_elf_create_dynamic_sections 15682#define elf_backend_finish_dynamic_sections nds32_elf_finish_dynamic_sections 15683#define elf_backend_finish_dynamic_symbol nds32_elf_finish_dynamic_symbol 15684#define elf_backend_size_dynamic_sections nds32_elf_size_dynamic_sections 15685#define elf_backend_relocate_section nds32_elf_relocate_section 15686#define elf_backend_gc_mark_hook nds32_elf_gc_mark_hook 15687#define elf_backend_gc_sweep_hook nds32_elf_gc_sweep_hook 15688#define elf_backend_grok_prstatus nds32_elf_grok_prstatus 15689#define elf_backend_grok_psinfo nds32_elf_grok_psinfo 15690#define elf_backend_reloc_type_class nds32_elf_reloc_type_class 15691#define elf_backend_copy_indirect_symbol nds32_elf_copy_indirect_symbol 15692#define elf_backend_link_output_symbol_hook nds32_elf_output_symbol_hook 15693#define elf_backend_output_arch_syms nds32_elf_output_arch_syms 15694#define elf_backend_object_p nds32_elf_object_p 15695#define elf_backend_final_write_processing nds32_elf_final_write_processing 15696#define elf_backend_special_sections nds32_elf_special_sections 15697#define bfd_elf32_bfd_get_relocated_section_contents \ 15698 nds32_elf_get_relocated_section_contents 15699 15700#define elf_backend_can_gc_sections 1 15701#define elf_backend_can_refcount 1 15702#define elf_backend_want_got_plt 1 15703#define elf_backend_plt_readonly 1 15704#define elf_backend_want_plt_sym 0 15705#define elf_backend_got_header_size 12 15706#define elf_backend_may_use_rel_p 1 15707#define elf_backend_default_use_rela_p 1 15708#define elf_backend_may_use_rela_p 1 15709 15710#include "elf32-target.h" 15711 15712#undef ELF_MAXPAGESIZE 15713#define ELF_MAXPAGESIZE 0x2000 15714 15715#undef TARGET_BIG_SYM 15716#define TARGET_BIG_SYM nds32_elf32_linux_be_vec 15717#undef TARGET_BIG_NAME 15718#define TARGET_BIG_NAME "elf32-nds32be-linux" 15719#undef TARGET_LITTLE_SYM 15720#define TARGET_LITTLE_SYM nds32_elf32_linux_le_vec 15721#undef TARGET_LITTLE_NAME 15722#define TARGET_LITTLE_NAME "elf32-nds32le-linux" 15723#undef elf32_bed 15724#define elf32_bed elf32_nds32_lin_bed 15725 15726#include "elf32-target.h" 15727