elf64-ppc.c revision 1.6
1/* PowerPC64-specific support for 64-bit ELF. 2 Copyright (C) 1999-2016 Free Software Foundation, Inc. 3 Written by Linus Nordberg, Swox AB <info@swox.com>, 4 based on elf32-ppc.c by Ian Lance Taylor. 5 Largely rewritten by Alan Modra. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License along 20 with this program; if not, write to the Free Software Foundation, Inc., 21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 24/* The 64-bit PowerPC ELF ABI may be found at 25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and 26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ 27 28#include "sysdep.h" 29#include <stdarg.h> 30#include "bfd.h" 31#include "bfdlink.h" 32#include "libbfd.h" 33#include "elf-bfd.h" 34#include "elf/ppc64.h" 35#include "elf64-ppc.h" 36#include "dwarf2.h" 37 38static bfd_reloc_status_type ppc64_elf_ha_reloc 39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 40static bfd_reloc_status_type ppc64_elf_branch_reloc 41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 42static bfd_reloc_status_type ppc64_elf_brtaken_reloc 43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 44static bfd_reloc_status_type ppc64_elf_sectoff_reloc 45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 46static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc 47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 48static bfd_reloc_status_type ppc64_elf_toc_reloc 49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 50static bfd_reloc_status_type ppc64_elf_toc_ha_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52static bfd_reloc_status_type ppc64_elf_toc64_reloc 53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 54static bfd_reloc_status_type ppc64_elf_unhandled_reloc 55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 56static bfd_vma opd_entry_value 57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean); 58 59#define TARGET_LITTLE_SYM powerpc_elf64_le_vec 60#define TARGET_LITTLE_NAME "elf64-powerpcle" 61#define TARGET_BIG_SYM powerpc_elf64_vec 62#define TARGET_BIG_NAME "elf64-powerpc" 63#define ELF_ARCH bfd_arch_powerpc 64#define ELF_TARGET_ID PPC64_ELF_DATA 65#define ELF_MACHINE_CODE EM_PPC64 66#define ELF_MAXPAGESIZE 0x10000 67#define ELF_COMMONPAGESIZE 0x10000 68#define elf_info_to_howto ppc64_elf_info_to_howto 69 70#define elf_backend_want_got_sym 0 71#define elf_backend_want_plt_sym 0 72#define elf_backend_plt_alignment 3 73#define elf_backend_plt_not_loaded 1 74#define elf_backend_got_header_size 8 75#define elf_backend_can_gc_sections 1 76#define elf_backend_can_refcount 1 77#define elf_backend_rela_normal 1 78#define elf_backend_default_execstack 0 79 80#define bfd_elf64_mkobject ppc64_elf_mkobject 81#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup 82#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup 83#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data 84#define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data 85#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook 86#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create 87#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab 88#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms 89 90#define elf_backend_object_p ppc64_elf_object_p 91#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus 92#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo 93#define elf_backend_write_core_note ppc64_elf_write_core_note 94#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections 95#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol 96#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook 97#define elf_backend_check_directives ppc64_elf_before_check_relocs 98#define elf_backend_notice_as_needed ppc64_elf_notice_as_needed 99#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup 100#define elf_backend_check_relocs ppc64_elf_check_relocs 101#define elf_backend_gc_keep ppc64_elf_gc_keep 102#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref 103#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook 104#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook 105#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol 106#define elf_backend_hide_symbol ppc64_elf_hide_symbol 107#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym 108#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust 109#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections 110#define elf_backend_hash_symbol ppc64_elf_hash_symbol 111#define elf_backend_init_index_section _bfd_elf_init_2_index_sections 112#define elf_backend_action_discarded ppc64_elf_action_discarded 113#define elf_backend_relocate_section ppc64_elf_relocate_section 114#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol 115#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class 116#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections 117#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook 118#define elf_backend_special_sections ppc64_elf_special_sections 119#define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute 120 121/* The name of the dynamic interpreter. This is put in the .interp 122 section. */ 123#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 124 125/* The size in bytes of an entry in the procedure linkage table. */ 126#define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8) 127 128/* The initial size of the plt reserved for the dynamic linker. */ 129#define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16) 130 131/* Offsets to some stack save slots. */ 132#define STK_LR 16 133#define STK_TOC(htab) (htab->opd_abi ? 40 : 24) 134/* This one is dodgy. ELFv2 does not have a linker word, so use the 135 CR save slot. Used only by optimised __tls_get_addr call stub, 136 relying on __tls_get_addr_opt not saving CR.. */ 137#define STK_LINKER(htab) (htab->opd_abi ? 32 : 8) 138 139/* TOC base pointers offset from start of TOC. */ 140#define TOC_BASE_OFF 0x8000 141/* TOC base alignment. */ 142#define TOC_BASE_ALIGN 256 143 144/* Offset of tp and dtp pointers from start of TLS block. */ 145#define TP_OFFSET 0x7000 146#define DTP_OFFSET 0x8000 147 148/* .plt call stub instructions. The normal stub is like this, but 149 sometimes the .plt entry crosses a 64k boundary and we need to 150 insert an addi to adjust r11. */ 151#define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */ 152#define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */ 153#define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */ 154#define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */ 155#define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */ 156#define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */ 157#define BCTR 0x4e800420 /* bctr */ 158 159#define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */ 160#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ 161#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ 162 163#define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */ 164#define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */ 165#define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */ 166#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */ 167#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */ 168#define BNECTR 0x4ca20420 /* bnectr+ */ 169#define BNECTR_P4 0x4ce20420 /* bnectr+ */ 170 171#define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */ 172#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ 173#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ 174 175#define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */ 176#define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */ 177#define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */ 178 179#define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */ 180#define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */ 181#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ 182#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ 183#define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */ 184 185/* glink call stub instructions. We enter with the index in R0. */ 186#define GLINK_CALL_STUB_SIZE (16*4) 187 /* 0: */ 188 /* .quad plt0-1f */ 189 /* __glink: */ 190#define MFLR_R12 0x7d8802a6 /* mflr %12 */ 191#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ 192 /* 1: */ 193#define MFLR_R11 0x7d6802a6 /* mflr %11 */ 194 /* ld %2,(0b-1b)(%11) */ 195#define MTLR_R12 0x7d8803a6 /* mtlr %12 */ 196#define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */ 197 /* ld %12,0(%11) */ 198 /* ld %2,8(%11) */ 199 /* mtctr %12 */ 200 /* ld %11,16(%11) */ 201 /* bctr */ 202#define MFLR_R0 0x7c0802a6 /* mflr %r0 */ 203#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ 204#define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */ 205#define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */ 206#define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */ 207 208/* Pad with this. */ 209#define NOP 0x60000000 210 211/* Some other nops. */ 212#define CROR_151515 0x4def7b82 213#define CROR_313131 0x4ffffb82 214 215/* .glink entries for the first 32k functions are two instructions. */ 216#define LI_R0_0 0x38000000 /* li %r0,0 */ 217#define B_DOT 0x48000000 /* b . */ 218 219/* After that, we need two instructions to load the index, followed by 220 a branch. */ 221#define LIS_R0_0 0x3c000000 /* lis %r0,0 */ 222#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ 223 224/* Instructions used by the save and restore reg functions. */ 225#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ 226#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ 227#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ 228#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ 229#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ 230#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ 231#define LI_R12_0 0x39800000 /* li %r12,0 */ 232#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ 233#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ 234#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ 235#define BLR 0x4e800020 /* blr */ 236 237/* Since .opd is an array of descriptors and each entry will end up 238 with identical R_PPC64_RELATIVE relocs, there is really no need to 239 propagate .opd relocs; The dynamic linker should be taught to 240 relocate .opd without reloc entries. */ 241#ifndef NO_OPD_RELOCS 242#define NO_OPD_RELOCS 0 243#endif 244 245#ifndef ARRAY_SIZE 246#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 247#endif 248 249static inline int 250abiversion (bfd *abfd) 251{ 252 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI; 253} 254 255static inline void 256set_abiversion (bfd *abfd, int ver) 257{ 258 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI; 259 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI; 260} 261 262#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) 263 264/* Relocation HOWTO's. */ 265static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; 266 267static reloc_howto_type ppc64_elf_howto_raw[] = { 268 /* This reloc does nothing. */ 269 HOWTO (R_PPC64_NONE, /* type */ 270 0, /* rightshift */ 271 3, /* size (0 = byte, 1 = short, 2 = long) */ 272 0, /* bitsize */ 273 FALSE, /* pc_relative */ 274 0, /* bitpos */ 275 complain_overflow_dont, /* complain_on_overflow */ 276 bfd_elf_generic_reloc, /* special_function */ 277 "R_PPC64_NONE", /* name */ 278 FALSE, /* partial_inplace */ 279 0, /* src_mask */ 280 0, /* dst_mask */ 281 FALSE), /* pcrel_offset */ 282 283 /* A standard 32 bit relocation. */ 284 HOWTO (R_PPC64_ADDR32, /* type */ 285 0, /* rightshift */ 286 2, /* size (0 = byte, 1 = short, 2 = long) */ 287 32, /* bitsize */ 288 FALSE, /* pc_relative */ 289 0, /* bitpos */ 290 complain_overflow_bitfield, /* complain_on_overflow */ 291 bfd_elf_generic_reloc, /* special_function */ 292 "R_PPC64_ADDR32", /* name */ 293 FALSE, /* partial_inplace */ 294 0, /* src_mask */ 295 0xffffffff, /* dst_mask */ 296 FALSE), /* pcrel_offset */ 297 298 /* An absolute 26 bit branch; the lower two bits must be zero. 299 FIXME: we don't check that, we just clear them. */ 300 HOWTO (R_PPC64_ADDR24, /* type */ 301 0, /* rightshift */ 302 2, /* size (0 = byte, 1 = short, 2 = long) */ 303 26, /* bitsize */ 304 FALSE, /* pc_relative */ 305 0, /* bitpos */ 306 complain_overflow_bitfield, /* complain_on_overflow */ 307 bfd_elf_generic_reloc, /* special_function */ 308 "R_PPC64_ADDR24", /* name */ 309 FALSE, /* partial_inplace */ 310 0, /* src_mask */ 311 0x03fffffc, /* dst_mask */ 312 FALSE), /* pcrel_offset */ 313 314 /* A standard 16 bit relocation. */ 315 HOWTO (R_PPC64_ADDR16, /* type */ 316 0, /* rightshift */ 317 1, /* size (0 = byte, 1 = short, 2 = long) */ 318 16, /* bitsize */ 319 FALSE, /* pc_relative */ 320 0, /* bitpos */ 321 complain_overflow_bitfield, /* complain_on_overflow */ 322 bfd_elf_generic_reloc, /* special_function */ 323 "R_PPC64_ADDR16", /* name */ 324 FALSE, /* partial_inplace */ 325 0, /* src_mask */ 326 0xffff, /* dst_mask */ 327 FALSE), /* pcrel_offset */ 328 329 /* A 16 bit relocation without overflow. */ 330 HOWTO (R_PPC64_ADDR16_LO, /* type */ 331 0, /* rightshift */ 332 1, /* size (0 = byte, 1 = short, 2 = long) */ 333 16, /* bitsize */ 334 FALSE, /* pc_relative */ 335 0, /* bitpos */ 336 complain_overflow_dont,/* complain_on_overflow */ 337 bfd_elf_generic_reloc, /* special_function */ 338 "R_PPC64_ADDR16_LO", /* name */ 339 FALSE, /* partial_inplace */ 340 0, /* src_mask */ 341 0xffff, /* dst_mask */ 342 FALSE), /* pcrel_offset */ 343 344 /* Bits 16-31 of an address. */ 345 HOWTO (R_PPC64_ADDR16_HI, /* type */ 346 16, /* rightshift */ 347 1, /* size (0 = byte, 1 = short, 2 = long) */ 348 16, /* bitsize */ 349 FALSE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_signed, /* complain_on_overflow */ 352 bfd_elf_generic_reloc, /* special_function */ 353 "R_PPC64_ADDR16_HI", /* name */ 354 FALSE, /* partial_inplace */ 355 0, /* src_mask */ 356 0xffff, /* dst_mask */ 357 FALSE), /* pcrel_offset */ 358 359 /* Bits 16-31 of an address, plus 1 if the contents of the low 16 360 bits, treated as a signed number, is negative. */ 361 HOWTO (R_PPC64_ADDR16_HA, /* type */ 362 16, /* rightshift */ 363 1, /* size (0 = byte, 1 = short, 2 = long) */ 364 16, /* bitsize */ 365 FALSE, /* pc_relative */ 366 0, /* bitpos */ 367 complain_overflow_signed, /* complain_on_overflow */ 368 ppc64_elf_ha_reloc, /* special_function */ 369 "R_PPC64_ADDR16_HA", /* name */ 370 FALSE, /* partial_inplace */ 371 0, /* src_mask */ 372 0xffff, /* dst_mask */ 373 FALSE), /* pcrel_offset */ 374 375 /* An absolute 16 bit branch; the lower two bits must be zero. 376 FIXME: we don't check that, we just clear them. */ 377 HOWTO (R_PPC64_ADDR14, /* type */ 378 0, /* rightshift */ 379 2, /* size (0 = byte, 1 = short, 2 = long) */ 380 16, /* bitsize */ 381 FALSE, /* pc_relative */ 382 0, /* bitpos */ 383 complain_overflow_signed, /* complain_on_overflow */ 384 ppc64_elf_branch_reloc, /* special_function */ 385 "R_PPC64_ADDR14", /* name */ 386 FALSE, /* partial_inplace */ 387 0, /* src_mask */ 388 0x0000fffc, /* dst_mask */ 389 FALSE), /* pcrel_offset */ 390 391 /* An absolute 16 bit branch, for which bit 10 should be set to 392 indicate that the branch is expected to be taken. The lower two 393 bits must be zero. */ 394 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ 395 0, /* rightshift */ 396 2, /* size (0 = byte, 1 = short, 2 = long) */ 397 16, /* bitsize */ 398 FALSE, /* pc_relative */ 399 0, /* bitpos */ 400 complain_overflow_signed, /* complain_on_overflow */ 401 ppc64_elf_brtaken_reloc, /* special_function */ 402 "R_PPC64_ADDR14_BRTAKEN",/* name */ 403 FALSE, /* partial_inplace */ 404 0, /* src_mask */ 405 0x0000fffc, /* dst_mask */ 406 FALSE), /* pcrel_offset */ 407 408 /* An absolute 16 bit branch, for which bit 10 should be set to 409 indicate that the branch is not expected to be taken. The lower 410 two bits must be zero. */ 411 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ 412 0, /* rightshift */ 413 2, /* size (0 = byte, 1 = short, 2 = long) */ 414 16, /* bitsize */ 415 FALSE, /* pc_relative */ 416 0, /* bitpos */ 417 complain_overflow_signed, /* complain_on_overflow */ 418 ppc64_elf_brtaken_reloc, /* special_function */ 419 "R_PPC64_ADDR14_BRNTAKEN",/* name */ 420 FALSE, /* partial_inplace */ 421 0, /* src_mask */ 422 0x0000fffc, /* dst_mask */ 423 FALSE), /* pcrel_offset */ 424 425 /* A relative 26 bit branch; the lower two bits must be zero. */ 426 HOWTO (R_PPC64_REL24, /* type */ 427 0, /* rightshift */ 428 2, /* size (0 = byte, 1 = short, 2 = long) */ 429 26, /* bitsize */ 430 TRUE, /* pc_relative */ 431 0, /* bitpos */ 432 complain_overflow_signed, /* complain_on_overflow */ 433 ppc64_elf_branch_reloc, /* special_function */ 434 "R_PPC64_REL24", /* name */ 435 FALSE, /* partial_inplace */ 436 0, /* src_mask */ 437 0x03fffffc, /* dst_mask */ 438 TRUE), /* pcrel_offset */ 439 440 /* A relative 16 bit branch; the lower two bits must be zero. */ 441 HOWTO (R_PPC64_REL14, /* type */ 442 0, /* rightshift */ 443 2, /* size (0 = byte, 1 = short, 2 = long) */ 444 16, /* bitsize */ 445 TRUE, /* pc_relative */ 446 0, /* bitpos */ 447 complain_overflow_signed, /* complain_on_overflow */ 448 ppc64_elf_branch_reloc, /* special_function */ 449 "R_PPC64_REL14", /* name */ 450 FALSE, /* partial_inplace */ 451 0, /* src_mask */ 452 0x0000fffc, /* dst_mask */ 453 TRUE), /* pcrel_offset */ 454 455 /* A relative 16 bit branch. Bit 10 should be set to indicate that 456 the branch is expected to be taken. The lower two bits must be 457 zero. */ 458 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ 459 0, /* rightshift */ 460 2, /* size (0 = byte, 1 = short, 2 = long) */ 461 16, /* bitsize */ 462 TRUE, /* pc_relative */ 463 0, /* bitpos */ 464 complain_overflow_signed, /* complain_on_overflow */ 465 ppc64_elf_brtaken_reloc, /* special_function */ 466 "R_PPC64_REL14_BRTAKEN", /* name */ 467 FALSE, /* partial_inplace */ 468 0, /* src_mask */ 469 0x0000fffc, /* dst_mask */ 470 TRUE), /* pcrel_offset */ 471 472 /* A relative 16 bit branch. Bit 10 should be set to indicate that 473 the branch is not expected to be taken. The lower two bits must 474 be zero. */ 475 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ 476 0, /* rightshift */ 477 2, /* size (0 = byte, 1 = short, 2 = long) */ 478 16, /* bitsize */ 479 TRUE, /* pc_relative */ 480 0, /* bitpos */ 481 complain_overflow_signed, /* complain_on_overflow */ 482 ppc64_elf_brtaken_reloc, /* special_function */ 483 "R_PPC64_REL14_BRNTAKEN",/* name */ 484 FALSE, /* partial_inplace */ 485 0, /* src_mask */ 486 0x0000fffc, /* dst_mask */ 487 TRUE), /* pcrel_offset */ 488 489 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the 490 symbol. */ 491 HOWTO (R_PPC64_GOT16, /* type */ 492 0, /* rightshift */ 493 1, /* size (0 = byte, 1 = short, 2 = long) */ 494 16, /* bitsize */ 495 FALSE, /* pc_relative */ 496 0, /* bitpos */ 497 complain_overflow_signed, /* complain_on_overflow */ 498 ppc64_elf_unhandled_reloc, /* special_function */ 499 "R_PPC64_GOT16", /* name */ 500 FALSE, /* partial_inplace */ 501 0, /* src_mask */ 502 0xffff, /* dst_mask */ 503 FALSE), /* pcrel_offset */ 504 505 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for 506 the symbol. */ 507 HOWTO (R_PPC64_GOT16_LO, /* type */ 508 0, /* rightshift */ 509 1, /* size (0 = byte, 1 = short, 2 = long) */ 510 16, /* bitsize */ 511 FALSE, /* pc_relative */ 512 0, /* bitpos */ 513 complain_overflow_dont, /* complain_on_overflow */ 514 ppc64_elf_unhandled_reloc, /* special_function */ 515 "R_PPC64_GOT16_LO", /* name */ 516 FALSE, /* partial_inplace */ 517 0, /* src_mask */ 518 0xffff, /* dst_mask */ 519 FALSE), /* pcrel_offset */ 520 521 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for 522 the symbol. */ 523 HOWTO (R_PPC64_GOT16_HI, /* type */ 524 16, /* rightshift */ 525 1, /* size (0 = byte, 1 = short, 2 = long) */ 526 16, /* bitsize */ 527 FALSE, /* pc_relative */ 528 0, /* bitpos */ 529 complain_overflow_signed,/* complain_on_overflow */ 530 ppc64_elf_unhandled_reloc, /* special_function */ 531 "R_PPC64_GOT16_HI", /* name */ 532 FALSE, /* partial_inplace */ 533 0, /* src_mask */ 534 0xffff, /* dst_mask */ 535 FALSE), /* pcrel_offset */ 536 537 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for 538 the symbol. */ 539 HOWTO (R_PPC64_GOT16_HA, /* type */ 540 16, /* rightshift */ 541 1, /* size (0 = byte, 1 = short, 2 = long) */ 542 16, /* bitsize */ 543 FALSE, /* pc_relative */ 544 0, /* bitpos */ 545 complain_overflow_signed,/* complain_on_overflow */ 546 ppc64_elf_unhandled_reloc, /* special_function */ 547 "R_PPC64_GOT16_HA", /* name */ 548 FALSE, /* partial_inplace */ 549 0, /* src_mask */ 550 0xffff, /* dst_mask */ 551 FALSE), /* pcrel_offset */ 552 553 /* This is used only by the dynamic linker. The symbol should exist 554 both in the object being run and in some shared library. The 555 dynamic linker copies the data addressed by the symbol from the 556 shared library into the object, because the object being 557 run has to have the data at some particular address. */ 558 HOWTO (R_PPC64_COPY, /* type */ 559 0, /* rightshift */ 560 0, /* this one is variable size */ 561 0, /* bitsize */ 562 FALSE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_dont, /* complain_on_overflow */ 565 ppc64_elf_unhandled_reloc, /* special_function */ 566 "R_PPC64_COPY", /* name */ 567 FALSE, /* partial_inplace */ 568 0, /* src_mask */ 569 0, /* dst_mask */ 570 FALSE), /* pcrel_offset */ 571 572 /* Like R_PPC64_ADDR64, but used when setting global offset table 573 entries. */ 574 HOWTO (R_PPC64_GLOB_DAT, /* type */ 575 0, /* rightshift */ 576 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 577 64, /* bitsize */ 578 FALSE, /* pc_relative */ 579 0, /* bitpos */ 580 complain_overflow_dont, /* complain_on_overflow */ 581 ppc64_elf_unhandled_reloc, /* special_function */ 582 "R_PPC64_GLOB_DAT", /* name */ 583 FALSE, /* partial_inplace */ 584 0, /* src_mask */ 585 ONES (64), /* dst_mask */ 586 FALSE), /* pcrel_offset */ 587 588 /* Created by the link editor. Marks a procedure linkage table 589 entry for a symbol. */ 590 HOWTO (R_PPC64_JMP_SLOT, /* type */ 591 0, /* rightshift */ 592 0, /* size (0 = byte, 1 = short, 2 = long) */ 593 0, /* bitsize */ 594 FALSE, /* pc_relative */ 595 0, /* bitpos */ 596 complain_overflow_dont, /* complain_on_overflow */ 597 ppc64_elf_unhandled_reloc, /* special_function */ 598 "R_PPC64_JMP_SLOT", /* name */ 599 FALSE, /* partial_inplace */ 600 0, /* src_mask */ 601 0, /* dst_mask */ 602 FALSE), /* pcrel_offset */ 603 604 /* Used only by the dynamic linker. When the object is run, this 605 doubleword64 is set to the load address of the object, plus the 606 addend. */ 607 HOWTO (R_PPC64_RELATIVE, /* type */ 608 0, /* rightshift */ 609 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 610 64, /* bitsize */ 611 FALSE, /* pc_relative */ 612 0, /* bitpos */ 613 complain_overflow_dont, /* complain_on_overflow */ 614 bfd_elf_generic_reloc, /* special_function */ 615 "R_PPC64_RELATIVE", /* name */ 616 FALSE, /* partial_inplace */ 617 0, /* src_mask */ 618 ONES (64), /* dst_mask */ 619 FALSE), /* pcrel_offset */ 620 621 /* Like R_PPC64_ADDR32, but may be unaligned. */ 622 HOWTO (R_PPC64_UADDR32, /* type */ 623 0, /* rightshift */ 624 2, /* size (0 = byte, 1 = short, 2 = long) */ 625 32, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_bitfield, /* complain_on_overflow */ 629 bfd_elf_generic_reloc, /* special_function */ 630 "R_PPC64_UADDR32", /* name */ 631 FALSE, /* partial_inplace */ 632 0, /* src_mask */ 633 0xffffffff, /* dst_mask */ 634 FALSE), /* pcrel_offset */ 635 636 /* Like R_PPC64_ADDR16, but may be unaligned. */ 637 HOWTO (R_PPC64_UADDR16, /* type */ 638 0, /* rightshift */ 639 1, /* size (0 = byte, 1 = short, 2 = long) */ 640 16, /* bitsize */ 641 FALSE, /* pc_relative */ 642 0, /* bitpos */ 643 complain_overflow_bitfield, /* complain_on_overflow */ 644 bfd_elf_generic_reloc, /* special_function */ 645 "R_PPC64_UADDR16", /* name */ 646 FALSE, /* partial_inplace */ 647 0, /* src_mask */ 648 0xffff, /* dst_mask */ 649 FALSE), /* pcrel_offset */ 650 651 /* 32-bit PC relative. */ 652 HOWTO (R_PPC64_REL32, /* type */ 653 0, /* rightshift */ 654 2, /* size (0 = byte, 1 = short, 2 = long) */ 655 32, /* bitsize */ 656 TRUE, /* pc_relative */ 657 0, /* bitpos */ 658 complain_overflow_signed, /* complain_on_overflow */ 659 bfd_elf_generic_reloc, /* special_function */ 660 "R_PPC64_REL32", /* name */ 661 FALSE, /* partial_inplace */ 662 0, /* src_mask */ 663 0xffffffff, /* dst_mask */ 664 TRUE), /* pcrel_offset */ 665 666 /* 32-bit relocation to the symbol's procedure linkage table. */ 667 HOWTO (R_PPC64_PLT32, /* type */ 668 0, /* rightshift */ 669 2, /* size (0 = byte, 1 = short, 2 = long) */ 670 32, /* bitsize */ 671 FALSE, /* pc_relative */ 672 0, /* bitpos */ 673 complain_overflow_bitfield, /* complain_on_overflow */ 674 ppc64_elf_unhandled_reloc, /* special_function */ 675 "R_PPC64_PLT32", /* name */ 676 FALSE, /* partial_inplace */ 677 0, /* src_mask */ 678 0xffffffff, /* dst_mask */ 679 FALSE), /* pcrel_offset */ 680 681 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 682 FIXME: R_PPC64_PLTREL32 not supported. */ 683 HOWTO (R_PPC64_PLTREL32, /* type */ 684 0, /* rightshift */ 685 2, /* size (0 = byte, 1 = short, 2 = long) */ 686 32, /* bitsize */ 687 TRUE, /* pc_relative */ 688 0, /* bitpos */ 689 complain_overflow_signed, /* complain_on_overflow */ 690 ppc64_elf_unhandled_reloc, /* special_function */ 691 "R_PPC64_PLTREL32", /* name */ 692 FALSE, /* partial_inplace */ 693 0, /* src_mask */ 694 0xffffffff, /* dst_mask */ 695 TRUE), /* pcrel_offset */ 696 697 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for 698 the symbol. */ 699 HOWTO (R_PPC64_PLT16_LO, /* type */ 700 0, /* rightshift */ 701 1, /* size (0 = byte, 1 = short, 2 = long) */ 702 16, /* bitsize */ 703 FALSE, /* pc_relative */ 704 0, /* bitpos */ 705 complain_overflow_dont, /* complain_on_overflow */ 706 ppc64_elf_unhandled_reloc, /* special_function */ 707 "R_PPC64_PLT16_LO", /* name */ 708 FALSE, /* partial_inplace */ 709 0, /* src_mask */ 710 0xffff, /* dst_mask */ 711 FALSE), /* pcrel_offset */ 712 713 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for 714 the symbol. */ 715 HOWTO (R_PPC64_PLT16_HI, /* type */ 716 16, /* rightshift */ 717 1, /* size (0 = byte, 1 = short, 2 = long) */ 718 16, /* bitsize */ 719 FALSE, /* pc_relative */ 720 0, /* bitpos */ 721 complain_overflow_signed, /* complain_on_overflow */ 722 ppc64_elf_unhandled_reloc, /* special_function */ 723 "R_PPC64_PLT16_HI", /* name */ 724 FALSE, /* partial_inplace */ 725 0, /* src_mask */ 726 0xffff, /* dst_mask */ 727 FALSE), /* pcrel_offset */ 728 729 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for 730 the symbol. */ 731 HOWTO (R_PPC64_PLT16_HA, /* type */ 732 16, /* rightshift */ 733 1, /* size (0 = byte, 1 = short, 2 = long) */ 734 16, /* bitsize */ 735 FALSE, /* pc_relative */ 736 0, /* bitpos */ 737 complain_overflow_signed, /* complain_on_overflow */ 738 ppc64_elf_unhandled_reloc, /* special_function */ 739 "R_PPC64_PLT16_HA", /* name */ 740 FALSE, /* partial_inplace */ 741 0, /* src_mask */ 742 0xffff, /* dst_mask */ 743 FALSE), /* pcrel_offset */ 744 745 /* 16-bit section relative relocation. */ 746 HOWTO (R_PPC64_SECTOFF, /* type */ 747 0, /* rightshift */ 748 1, /* size (0 = byte, 1 = short, 2 = long) */ 749 16, /* bitsize */ 750 FALSE, /* pc_relative */ 751 0, /* bitpos */ 752 complain_overflow_signed, /* complain_on_overflow */ 753 ppc64_elf_sectoff_reloc, /* special_function */ 754 "R_PPC64_SECTOFF", /* name */ 755 FALSE, /* partial_inplace */ 756 0, /* src_mask */ 757 0xffff, /* dst_mask */ 758 FALSE), /* pcrel_offset */ 759 760 /* Like R_PPC64_SECTOFF, but no overflow warning. */ 761 HOWTO (R_PPC64_SECTOFF_LO, /* type */ 762 0, /* rightshift */ 763 1, /* size (0 = byte, 1 = short, 2 = long) */ 764 16, /* bitsize */ 765 FALSE, /* pc_relative */ 766 0, /* bitpos */ 767 complain_overflow_dont, /* complain_on_overflow */ 768 ppc64_elf_sectoff_reloc, /* special_function */ 769 "R_PPC64_SECTOFF_LO", /* name */ 770 FALSE, /* partial_inplace */ 771 0, /* src_mask */ 772 0xffff, /* dst_mask */ 773 FALSE), /* pcrel_offset */ 774 775 /* 16-bit upper half section relative relocation. */ 776 HOWTO (R_PPC64_SECTOFF_HI, /* type */ 777 16, /* rightshift */ 778 1, /* size (0 = byte, 1 = short, 2 = long) */ 779 16, /* bitsize */ 780 FALSE, /* pc_relative */ 781 0, /* bitpos */ 782 complain_overflow_signed, /* complain_on_overflow */ 783 ppc64_elf_sectoff_reloc, /* special_function */ 784 "R_PPC64_SECTOFF_HI", /* name */ 785 FALSE, /* partial_inplace */ 786 0, /* src_mask */ 787 0xffff, /* dst_mask */ 788 FALSE), /* pcrel_offset */ 789 790 /* 16-bit upper half adjusted section relative relocation. */ 791 HOWTO (R_PPC64_SECTOFF_HA, /* type */ 792 16, /* rightshift */ 793 1, /* size (0 = byte, 1 = short, 2 = long) */ 794 16, /* bitsize */ 795 FALSE, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_signed, /* complain_on_overflow */ 798 ppc64_elf_sectoff_ha_reloc, /* special_function */ 799 "R_PPC64_SECTOFF_HA", /* name */ 800 FALSE, /* partial_inplace */ 801 0, /* src_mask */ 802 0xffff, /* dst_mask */ 803 FALSE), /* pcrel_offset */ 804 805 /* Like R_PPC64_REL24 without touching the two least significant bits. */ 806 HOWTO (R_PPC64_REL30, /* type */ 807 2, /* rightshift */ 808 2, /* size (0 = byte, 1 = short, 2 = long) */ 809 30, /* bitsize */ 810 TRUE, /* pc_relative */ 811 0, /* bitpos */ 812 complain_overflow_dont, /* complain_on_overflow */ 813 bfd_elf_generic_reloc, /* special_function */ 814 "R_PPC64_REL30", /* name */ 815 FALSE, /* partial_inplace */ 816 0, /* src_mask */ 817 0xfffffffc, /* dst_mask */ 818 TRUE), /* pcrel_offset */ 819 820 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ 821 822 /* A standard 64-bit relocation. */ 823 HOWTO (R_PPC64_ADDR64, /* type */ 824 0, /* rightshift */ 825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 826 64, /* bitsize */ 827 FALSE, /* pc_relative */ 828 0, /* bitpos */ 829 complain_overflow_dont, /* complain_on_overflow */ 830 bfd_elf_generic_reloc, /* special_function */ 831 "R_PPC64_ADDR64", /* name */ 832 FALSE, /* partial_inplace */ 833 0, /* src_mask */ 834 ONES (64), /* dst_mask */ 835 FALSE), /* pcrel_offset */ 836 837 /* The bits 32-47 of an address. */ 838 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ 839 32, /* rightshift */ 840 1, /* size (0 = byte, 1 = short, 2 = long) */ 841 16, /* bitsize */ 842 FALSE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_dont, /* complain_on_overflow */ 845 bfd_elf_generic_reloc, /* special_function */ 846 "R_PPC64_ADDR16_HIGHER", /* name */ 847 FALSE, /* partial_inplace */ 848 0, /* src_mask */ 849 0xffff, /* dst_mask */ 850 FALSE), /* pcrel_offset */ 851 852 /* The bits 32-47 of an address, plus 1 if the contents of the low 853 16 bits, treated as a signed number, is negative. */ 854 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ 855 32, /* rightshift */ 856 1, /* size (0 = byte, 1 = short, 2 = long) */ 857 16, /* bitsize */ 858 FALSE, /* pc_relative */ 859 0, /* bitpos */ 860 complain_overflow_dont, /* complain_on_overflow */ 861 ppc64_elf_ha_reloc, /* special_function */ 862 "R_PPC64_ADDR16_HIGHERA", /* name */ 863 FALSE, /* partial_inplace */ 864 0, /* src_mask */ 865 0xffff, /* dst_mask */ 866 FALSE), /* pcrel_offset */ 867 868 /* The bits 48-63 of an address. */ 869 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ 870 48, /* rightshift */ 871 1, /* size (0 = byte, 1 = short, 2 = long) */ 872 16, /* bitsize */ 873 FALSE, /* pc_relative */ 874 0, /* bitpos */ 875 complain_overflow_dont, /* complain_on_overflow */ 876 bfd_elf_generic_reloc, /* special_function */ 877 "R_PPC64_ADDR16_HIGHEST", /* name */ 878 FALSE, /* partial_inplace */ 879 0, /* src_mask */ 880 0xffff, /* dst_mask */ 881 FALSE), /* pcrel_offset */ 882 883 /* The bits 48-63 of an address, plus 1 if the contents of the low 884 16 bits, treated as a signed number, is negative. */ 885 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ 886 48, /* rightshift */ 887 1, /* size (0 = byte, 1 = short, 2 = long) */ 888 16, /* bitsize */ 889 FALSE, /* pc_relative */ 890 0, /* bitpos */ 891 complain_overflow_dont, /* complain_on_overflow */ 892 ppc64_elf_ha_reloc, /* special_function */ 893 "R_PPC64_ADDR16_HIGHESTA", /* name */ 894 FALSE, /* partial_inplace */ 895 0, /* src_mask */ 896 0xffff, /* dst_mask */ 897 FALSE), /* pcrel_offset */ 898 899 /* Like ADDR64, but may be unaligned. */ 900 HOWTO (R_PPC64_UADDR64, /* type */ 901 0, /* rightshift */ 902 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 903 64, /* bitsize */ 904 FALSE, /* pc_relative */ 905 0, /* bitpos */ 906 complain_overflow_dont, /* complain_on_overflow */ 907 bfd_elf_generic_reloc, /* special_function */ 908 "R_PPC64_UADDR64", /* name */ 909 FALSE, /* partial_inplace */ 910 0, /* src_mask */ 911 ONES (64), /* dst_mask */ 912 FALSE), /* pcrel_offset */ 913 914 /* 64-bit relative relocation. */ 915 HOWTO (R_PPC64_REL64, /* type */ 916 0, /* rightshift */ 917 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 918 64, /* bitsize */ 919 TRUE, /* pc_relative */ 920 0, /* bitpos */ 921 complain_overflow_dont, /* complain_on_overflow */ 922 bfd_elf_generic_reloc, /* special_function */ 923 "R_PPC64_REL64", /* name */ 924 FALSE, /* partial_inplace */ 925 0, /* src_mask */ 926 ONES (64), /* dst_mask */ 927 TRUE), /* pcrel_offset */ 928 929 /* 64-bit relocation to the symbol's procedure linkage table. */ 930 HOWTO (R_PPC64_PLT64, /* type */ 931 0, /* rightshift */ 932 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 933 64, /* bitsize */ 934 FALSE, /* pc_relative */ 935 0, /* bitpos */ 936 complain_overflow_dont, /* complain_on_overflow */ 937 ppc64_elf_unhandled_reloc, /* special_function */ 938 "R_PPC64_PLT64", /* name */ 939 FALSE, /* partial_inplace */ 940 0, /* src_mask */ 941 ONES (64), /* dst_mask */ 942 FALSE), /* pcrel_offset */ 943 944 /* 64-bit PC relative relocation to the symbol's procedure linkage 945 table. */ 946 /* FIXME: R_PPC64_PLTREL64 not supported. */ 947 HOWTO (R_PPC64_PLTREL64, /* type */ 948 0, /* rightshift */ 949 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 950 64, /* bitsize */ 951 TRUE, /* pc_relative */ 952 0, /* bitpos */ 953 complain_overflow_dont, /* complain_on_overflow */ 954 ppc64_elf_unhandled_reloc, /* special_function */ 955 "R_PPC64_PLTREL64", /* name */ 956 FALSE, /* partial_inplace */ 957 0, /* src_mask */ 958 ONES (64), /* dst_mask */ 959 TRUE), /* pcrel_offset */ 960 961 /* 16 bit TOC-relative relocation. */ 962 963 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ 964 HOWTO (R_PPC64_TOC16, /* type */ 965 0, /* rightshift */ 966 1, /* size (0 = byte, 1 = short, 2 = long) */ 967 16, /* bitsize */ 968 FALSE, /* pc_relative */ 969 0, /* bitpos */ 970 complain_overflow_signed, /* complain_on_overflow */ 971 ppc64_elf_toc_reloc, /* special_function */ 972 "R_PPC64_TOC16", /* name */ 973 FALSE, /* partial_inplace */ 974 0, /* src_mask */ 975 0xffff, /* dst_mask */ 976 FALSE), /* pcrel_offset */ 977 978 /* 16 bit TOC-relative relocation without overflow. */ 979 980 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ 981 HOWTO (R_PPC64_TOC16_LO, /* type */ 982 0, /* rightshift */ 983 1, /* size (0 = byte, 1 = short, 2 = long) */ 984 16, /* bitsize */ 985 FALSE, /* pc_relative */ 986 0, /* bitpos */ 987 complain_overflow_dont, /* complain_on_overflow */ 988 ppc64_elf_toc_reloc, /* special_function */ 989 "R_PPC64_TOC16_LO", /* name */ 990 FALSE, /* partial_inplace */ 991 0, /* src_mask */ 992 0xffff, /* dst_mask */ 993 FALSE), /* pcrel_offset */ 994 995 /* 16 bit TOC-relative relocation, high 16 bits. */ 996 997 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ 998 HOWTO (R_PPC64_TOC16_HI, /* type */ 999 16, /* rightshift */ 1000 1, /* size (0 = byte, 1 = short, 2 = long) */ 1001 16, /* bitsize */ 1002 FALSE, /* pc_relative */ 1003 0, /* bitpos */ 1004 complain_overflow_signed, /* complain_on_overflow */ 1005 ppc64_elf_toc_reloc, /* special_function */ 1006 "R_PPC64_TOC16_HI", /* name */ 1007 FALSE, /* partial_inplace */ 1008 0, /* src_mask */ 1009 0xffff, /* dst_mask */ 1010 FALSE), /* pcrel_offset */ 1011 1012 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the 1013 contents of the low 16 bits, treated as a signed number, is 1014 negative. */ 1015 1016 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ 1017 HOWTO (R_PPC64_TOC16_HA, /* type */ 1018 16, /* rightshift */ 1019 1, /* size (0 = byte, 1 = short, 2 = long) */ 1020 16, /* bitsize */ 1021 FALSE, /* pc_relative */ 1022 0, /* bitpos */ 1023 complain_overflow_signed, /* complain_on_overflow */ 1024 ppc64_elf_toc_ha_reloc, /* special_function */ 1025 "R_PPC64_TOC16_HA", /* name */ 1026 FALSE, /* partial_inplace */ 1027 0, /* src_mask */ 1028 0xffff, /* dst_mask */ 1029 FALSE), /* pcrel_offset */ 1030 1031 /* 64-bit relocation; insert value of TOC base (.TOC.). */ 1032 1033 /* R_PPC64_TOC 51 doubleword64 .TOC. */ 1034 HOWTO (R_PPC64_TOC, /* type */ 1035 0, /* rightshift */ 1036 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 1037 64, /* bitsize */ 1038 FALSE, /* pc_relative */ 1039 0, /* bitpos */ 1040 complain_overflow_dont, /* complain_on_overflow */ 1041 ppc64_elf_toc64_reloc, /* special_function */ 1042 "R_PPC64_TOC", /* name */ 1043 FALSE, /* partial_inplace */ 1044 0, /* src_mask */ 1045 ONES (64), /* dst_mask */ 1046 FALSE), /* pcrel_offset */ 1047 1048 /* Like R_PPC64_GOT16, but also informs the link editor that the 1049 value to relocate may (!) refer to a PLT entry which the link 1050 editor (a) may replace with the symbol value. If the link editor 1051 is unable to fully resolve the symbol, it may (b) create a PLT 1052 entry and store the address to the new PLT entry in the GOT. 1053 This permits lazy resolution of function symbols at run time. 1054 The link editor may also skip all of this and just (c) emit a 1055 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ 1056 /* FIXME: R_PPC64_PLTGOT16 not implemented. */ 1057 HOWTO (R_PPC64_PLTGOT16, /* type */ 1058 0, /* rightshift */ 1059 1, /* size (0 = byte, 1 = short, 2 = long) */ 1060 16, /* bitsize */ 1061 FALSE, /* pc_relative */ 1062 0, /* bitpos */ 1063 complain_overflow_signed, /* complain_on_overflow */ 1064 ppc64_elf_unhandled_reloc, /* special_function */ 1065 "R_PPC64_PLTGOT16", /* name */ 1066 FALSE, /* partial_inplace */ 1067 0, /* src_mask */ 1068 0xffff, /* dst_mask */ 1069 FALSE), /* pcrel_offset */ 1070 1071 /* Like R_PPC64_PLTGOT16, but without overflow. */ 1072 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ 1073 HOWTO (R_PPC64_PLTGOT16_LO, /* type */ 1074 0, /* rightshift */ 1075 1, /* size (0 = byte, 1 = short, 2 = long) */ 1076 16, /* bitsize */ 1077 FALSE, /* pc_relative */ 1078 0, /* bitpos */ 1079 complain_overflow_dont, /* complain_on_overflow */ 1080 ppc64_elf_unhandled_reloc, /* special_function */ 1081 "R_PPC64_PLTGOT16_LO", /* name */ 1082 FALSE, /* partial_inplace */ 1083 0, /* src_mask */ 1084 0xffff, /* dst_mask */ 1085 FALSE), /* pcrel_offset */ 1086 1087 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ 1088 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ 1089 HOWTO (R_PPC64_PLTGOT16_HI, /* type */ 1090 16, /* rightshift */ 1091 1, /* size (0 = byte, 1 = short, 2 = long) */ 1092 16, /* bitsize */ 1093 FALSE, /* pc_relative */ 1094 0, /* bitpos */ 1095 complain_overflow_signed, /* complain_on_overflow */ 1096 ppc64_elf_unhandled_reloc, /* special_function */ 1097 "R_PPC64_PLTGOT16_HI", /* name */ 1098 FALSE, /* partial_inplace */ 1099 0, /* src_mask */ 1100 0xffff, /* dst_mask */ 1101 FALSE), /* pcrel_offset */ 1102 1103 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus 1104 1 if the contents of the low 16 bits, treated as a signed number, 1105 is negative. */ 1106 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ 1107 HOWTO (R_PPC64_PLTGOT16_HA, /* type */ 1108 16, /* rightshift */ 1109 1, /* size (0 = byte, 1 = short, 2 = long) */ 1110 16, /* bitsize */ 1111 FALSE, /* pc_relative */ 1112 0, /* bitpos */ 1113 complain_overflow_signed, /* complain_on_overflow */ 1114 ppc64_elf_unhandled_reloc, /* special_function */ 1115 "R_PPC64_PLTGOT16_HA", /* name */ 1116 FALSE, /* partial_inplace */ 1117 0, /* src_mask */ 1118 0xffff, /* dst_mask */ 1119 FALSE), /* pcrel_offset */ 1120 1121 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ 1122 HOWTO (R_PPC64_ADDR16_DS, /* type */ 1123 0, /* rightshift */ 1124 1, /* size (0 = byte, 1 = short, 2 = long) */ 1125 16, /* bitsize */ 1126 FALSE, /* pc_relative */ 1127 0, /* bitpos */ 1128 complain_overflow_signed, /* complain_on_overflow */ 1129 bfd_elf_generic_reloc, /* special_function */ 1130 "R_PPC64_ADDR16_DS", /* name */ 1131 FALSE, /* partial_inplace */ 1132 0, /* src_mask */ 1133 0xfffc, /* dst_mask */ 1134 FALSE), /* pcrel_offset */ 1135 1136 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ 1137 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ 1138 0, /* rightshift */ 1139 1, /* size (0 = byte, 1 = short, 2 = long) */ 1140 16, /* bitsize */ 1141 FALSE, /* pc_relative */ 1142 0, /* bitpos */ 1143 complain_overflow_dont,/* complain_on_overflow */ 1144 bfd_elf_generic_reloc, /* special_function */ 1145 "R_PPC64_ADDR16_LO_DS",/* name */ 1146 FALSE, /* partial_inplace */ 1147 0, /* src_mask */ 1148 0xfffc, /* dst_mask */ 1149 FALSE), /* pcrel_offset */ 1150 1151 /* Like R_PPC64_GOT16, but for instructions with a DS field. */ 1152 HOWTO (R_PPC64_GOT16_DS, /* type */ 1153 0, /* rightshift */ 1154 1, /* size (0 = byte, 1 = short, 2 = long) */ 1155 16, /* bitsize */ 1156 FALSE, /* pc_relative */ 1157 0, /* bitpos */ 1158 complain_overflow_signed, /* complain_on_overflow */ 1159 ppc64_elf_unhandled_reloc, /* special_function */ 1160 "R_PPC64_GOT16_DS", /* name */ 1161 FALSE, /* partial_inplace */ 1162 0, /* src_mask */ 1163 0xfffc, /* dst_mask */ 1164 FALSE), /* pcrel_offset */ 1165 1166 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ 1167 HOWTO (R_PPC64_GOT16_LO_DS, /* type */ 1168 0, /* rightshift */ 1169 1, /* size (0 = byte, 1 = short, 2 = long) */ 1170 16, /* bitsize */ 1171 FALSE, /* pc_relative */ 1172 0, /* bitpos */ 1173 complain_overflow_dont, /* complain_on_overflow */ 1174 ppc64_elf_unhandled_reloc, /* special_function */ 1175 "R_PPC64_GOT16_LO_DS", /* name */ 1176 FALSE, /* partial_inplace */ 1177 0, /* src_mask */ 1178 0xfffc, /* dst_mask */ 1179 FALSE), /* pcrel_offset */ 1180 1181 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ 1182 HOWTO (R_PPC64_PLT16_LO_DS, /* type */ 1183 0, /* rightshift */ 1184 1, /* size (0 = byte, 1 = short, 2 = long) */ 1185 16, /* bitsize */ 1186 FALSE, /* pc_relative */ 1187 0, /* bitpos */ 1188 complain_overflow_dont, /* complain_on_overflow */ 1189 ppc64_elf_unhandled_reloc, /* special_function */ 1190 "R_PPC64_PLT16_LO_DS", /* name */ 1191 FALSE, /* partial_inplace */ 1192 0, /* src_mask */ 1193 0xfffc, /* dst_mask */ 1194 FALSE), /* pcrel_offset */ 1195 1196 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ 1197 HOWTO (R_PPC64_SECTOFF_DS, /* type */ 1198 0, /* rightshift */ 1199 1, /* size (0 = byte, 1 = short, 2 = long) */ 1200 16, /* bitsize */ 1201 FALSE, /* pc_relative */ 1202 0, /* bitpos */ 1203 complain_overflow_signed, /* complain_on_overflow */ 1204 ppc64_elf_sectoff_reloc, /* special_function */ 1205 "R_PPC64_SECTOFF_DS", /* name */ 1206 FALSE, /* partial_inplace */ 1207 0, /* src_mask */ 1208 0xfffc, /* dst_mask */ 1209 FALSE), /* pcrel_offset */ 1210 1211 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ 1212 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ 1213 0, /* rightshift */ 1214 1, /* size (0 = byte, 1 = short, 2 = long) */ 1215 16, /* bitsize */ 1216 FALSE, /* pc_relative */ 1217 0, /* bitpos */ 1218 complain_overflow_dont, /* complain_on_overflow */ 1219 ppc64_elf_sectoff_reloc, /* special_function */ 1220 "R_PPC64_SECTOFF_LO_DS",/* name */ 1221 FALSE, /* partial_inplace */ 1222 0, /* src_mask */ 1223 0xfffc, /* dst_mask */ 1224 FALSE), /* pcrel_offset */ 1225 1226 /* Like R_PPC64_TOC16, but for instructions with a DS field. */ 1227 HOWTO (R_PPC64_TOC16_DS, /* type */ 1228 0, /* rightshift */ 1229 1, /* size (0 = byte, 1 = short, 2 = long) */ 1230 16, /* bitsize */ 1231 FALSE, /* pc_relative */ 1232 0, /* bitpos */ 1233 complain_overflow_signed, /* complain_on_overflow */ 1234 ppc64_elf_toc_reloc, /* special_function */ 1235 "R_PPC64_TOC16_DS", /* name */ 1236 FALSE, /* partial_inplace */ 1237 0, /* src_mask */ 1238 0xfffc, /* dst_mask */ 1239 FALSE), /* pcrel_offset */ 1240 1241 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ 1242 HOWTO (R_PPC64_TOC16_LO_DS, /* type */ 1243 0, /* rightshift */ 1244 1, /* size (0 = byte, 1 = short, 2 = long) */ 1245 16, /* bitsize */ 1246 FALSE, /* pc_relative */ 1247 0, /* bitpos */ 1248 complain_overflow_dont, /* complain_on_overflow */ 1249 ppc64_elf_toc_reloc, /* special_function */ 1250 "R_PPC64_TOC16_LO_DS", /* name */ 1251 FALSE, /* partial_inplace */ 1252 0, /* src_mask */ 1253 0xfffc, /* dst_mask */ 1254 FALSE), /* pcrel_offset */ 1255 1256 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ 1257 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ 1258 HOWTO (R_PPC64_PLTGOT16_DS, /* type */ 1259 0, /* rightshift */ 1260 1, /* size (0 = byte, 1 = short, 2 = long) */ 1261 16, /* bitsize */ 1262 FALSE, /* pc_relative */ 1263 0, /* bitpos */ 1264 complain_overflow_signed, /* complain_on_overflow */ 1265 ppc64_elf_unhandled_reloc, /* special_function */ 1266 "R_PPC64_PLTGOT16_DS", /* name */ 1267 FALSE, /* partial_inplace */ 1268 0, /* src_mask */ 1269 0xfffc, /* dst_mask */ 1270 FALSE), /* pcrel_offset */ 1271 1272 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ 1273 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ 1274 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ 1275 0, /* rightshift */ 1276 1, /* size (0 = byte, 1 = short, 2 = long) */ 1277 16, /* bitsize */ 1278 FALSE, /* pc_relative */ 1279 0, /* bitpos */ 1280 complain_overflow_dont, /* complain_on_overflow */ 1281 ppc64_elf_unhandled_reloc, /* special_function */ 1282 "R_PPC64_PLTGOT16_LO_DS",/* name */ 1283 FALSE, /* partial_inplace */ 1284 0, /* src_mask */ 1285 0xfffc, /* dst_mask */ 1286 FALSE), /* pcrel_offset */ 1287 1288 /* Marker relocs for TLS. */ 1289 HOWTO (R_PPC64_TLS, 1290 0, /* rightshift */ 1291 2, /* size (0 = byte, 1 = short, 2 = long) */ 1292 32, /* bitsize */ 1293 FALSE, /* pc_relative */ 1294 0, /* bitpos */ 1295 complain_overflow_dont, /* complain_on_overflow */ 1296 bfd_elf_generic_reloc, /* special_function */ 1297 "R_PPC64_TLS", /* name */ 1298 FALSE, /* partial_inplace */ 1299 0, /* src_mask */ 1300 0, /* dst_mask */ 1301 FALSE), /* pcrel_offset */ 1302 1303 HOWTO (R_PPC64_TLSGD, 1304 0, /* rightshift */ 1305 2, /* size (0 = byte, 1 = short, 2 = long) */ 1306 32, /* bitsize */ 1307 FALSE, /* pc_relative */ 1308 0, /* bitpos */ 1309 complain_overflow_dont, /* complain_on_overflow */ 1310 bfd_elf_generic_reloc, /* special_function */ 1311 "R_PPC64_TLSGD", /* name */ 1312 FALSE, /* partial_inplace */ 1313 0, /* src_mask */ 1314 0, /* dst_mask */ 1315 FALSE), /* pcrel_offset */ 1316 1317 HOWTO (R_PPC64_TLSLD, 1318 0, /* rightshift */ 1319 2, /* size (0 = byte, 1 = short, 2 = long) */ 1320 32, /* bitsize */ 1321 FALSE, /* pc_relative */ 1322 0, /* bitpos */ 1323 complain_overflow_dont, /* complain_on_overflow */ 1324 bfd_elf_generic_reloc, /* special_function */ 1325 "R_PPC64_TLSLD", /* name */ 1326 FALSE, /* partial_inplace */ 1327 0, /* src_mask */ 1328 0, /* dst_mask */ 1329 FALSE), /* pcrel_offset */ 1330 1331 HOWTO (R_PPC64_TOCSAVE, 1332 0, /* rightshift */ 1333 2, /* size (0 = byte, 1 = short, 2 = long) */ 1334 32, /* bitsize */ 1335 FALSE, /* pc_relative */ 1336 0, /* bitpos */ 1337 complain_overflow_dont, /* complain_on_overflow */ 1338 bfd_elf_generic_reloc, /* special_function */ 1339 "R_PPC64_TOCSAVE", /* name */ 1340 FALSE, /* partial_inplace */ 1341 0, /* src_mask */ 1342 0, /* dst_mask */ 1343 FALSE), /* pcrel_offset */ 1344 1345 /* Computes the load module index of the load module that contains the 1346 definition of its TLS sym. */ 1347 HOWTO (R_PPC64_DTPMOD64, 1348 0, /* rightshift */ 1349 4, /* size (0 = byte, 1 = short, 2 = long) */ 1350 64, /* bitsize */ 1351 FALSE, /* pc_relative */ 1352 0, /* bitpos */ 1353 complain_overflow_dont, /* complain_on_overflow */ 1354 ppc64_elf_unhandled_reloc, /* special_function */ 1355 "R_PPC64_DTPMOD64", /* name */ 1356 FALSE, /* partial_inplace */ 1357 0, /* src_mask */ 1358 ONES (64), /* dst_mask */ 1359 FALSE), /* pcrel_offset */ 1360 1361 /* Computes a dtv-relative displacement, the difference between the value 1362 of sym+add and the base address of the thread-local storage block that 1363 contains the definition of sym, minus 0x8000. */ 1364 HOWTO (R_PPC64_DTPREL64, 1365 0, /* rightshift */ 1366 4, /* size (0 = byte, 1 = short, 2 = long) */ 1367 64, /* bitsize */ 1368 FALSE, /* pc_relative */ 1369 0, /* bitpos */ 1370 complain_overflow_dont, /* complain_on_overflow */ 1371 ppc64_elf_unhandled_reloc, /* special_function */ 1372 "R_PPC64_DTPREL64", /* name */ 1373 FALSE, /* partial_inplace */ 1374 0, /* src_mask */ 1375 ONES (64), /* dst_mask */ 1376 FALSE), /* pcrel_offset */ 1377 1378 /* A 16 bit dtprel reloc. */ 1379 HOWTO (R_PPC64_DTPREL16, 1380 0, /* rightshift */ 1381 1, /* size (0 = byte, 1 = short, 2 = long) */ 1382 16, /* bitsize */ 1383 FALSE, /* pc_relative */ 1384 0, /* bitpos */ 1385 complain_overflow_signed, /* complain_on_overflow */ 1386 ppc64_elf_unhandled_reloc, /* special_function */ 1387 "R_PPC64_DTPREL16", /* name */ 1388 FALSE, /* partial_inplace */ 1389 0, /* src_mask */ 1390 0xffff, /* dst_mask */ 1391 FALSE), /* pcrel_offset */ 1392 1393 /* Like DTPREL16, but no overflow. */ 1394 HOWTO (R_PPC64_DTPREL16_LO, 1395 0, /* rightshift */ 1396 1, /* size (0 = byte, 1 = short, 2 = long) */ 1397 16, /* bitsize */ 1398 FALSE, /* pc_relative */ 1399 0, /* bitpos */ 1400 complain_overflow_dont, /* complain_on_overflow */ 1401 ppc64_elf_unhandled_reloc, /* special_function */ 1402 "R_PPC64_DTPREL16_LO", /* name */ 1403 FALSE, /* partial_inplace */ 1404 0, /* src_mask */ 1405 0xffff, /* dst_mask */ 1406 FALSE), /* pcrel_offset */ 1407 1408 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 1409 HOWTO (R_PPC64_DTPREL16_HI, 1410 16, /* rightshift */ 1411 1, /* size (0 = byte, 1 = short, 2 = long) */ 1412 16, /* bitsize */ 1413 FALSE, /* pc_relative */ 1414 0, /* bitpos */ 1415 complain_overflow_signed, /* complain_on_overflow */ 1416 ppc64_elf_unhandled_reloc, /* special_function */ 1417 "R_PPC64_DTPREL16_HI", /* name */ 1418 FALSE, /* partial_inplace */ 1419 0, /* src_mask */ 1420 0xffff, /* dst_mask */ 1421 FALSE), /* pcrel_offset */ 1422 1423 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 1424 HOWTO (R_PPC64_DTPREL16_HA, 1425 16, /* rightshift */ 1426 1, /* size (0 = byte, 1 = short, 2 = long) */ 1427 16, /* bitsize */ 1428 FALSE, /* pc_relative */ 1429 0, /* bitpos */ 1430 complain_overflow_signed, /* complain_on_overflow */ 1431 ppc64_elf_unhandled_reloc, /* special_function */ 1432 "R_PPC64_DTPREL16_HA", /* name */ 1433 FALSE, /* partial_inplace */ 1434 0, /* src_mask */ 1435 0xffff, /* dst_mask */ 1436 FALSE), /* pcrel_offset */ 1437 1438 /* Like DTPREL16_HI, but next higher group of 16 bits. */ 1439 HOWTO (R_PPC64_DTPREL16_HIGHER, 1440 32, /* rightshift */ 1441 1, /* size (0 = byte, 1 = short, 2 = long) */ 1442 16, /* bitsize */ 1443 FALSE, /* pc_relative */ 1444 0, /* bitpos */ 1445 complain_overflow_dont, /* complain_on_overflow */ 1446 ppc64_elf_unhandled_reloc, /* special_function */ 1447 "R_PPC64_DTPREL16_HIGHER", /* name */ 1448 FALSE, /* partial_inplace */ 1449 0, /* src_mask */ 1450 0xffff, /* dst_mask */ 1451 FALSE), /* pcrel_offset */ 1452 1453 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ 1454 HOWTO (R_PPC64_DTPREL16_HIGHERA, 1455 32, /* rightshift */ 1456 1, /* size (0 = byte, 1 = short, 2 = long) */ 1457 16, /* bitsize */ 1458 FALSE, /* pc_relative */ 1459 0, /* bitpos */ 1460 complain_overflow_dont, /* complain_on_overflow */ 1461 ppc64_elf_unhandled_reloc, /* special_function */ 1462 "R_PPC64_DTPREL16_HIGHERA", /* name */ 1463 FALSE, /* partial_inplace */ 1464 0, /* src_mask */ 1465 0xffff, /* dst_mask */ 1466 FALSE), /* pcrel_offset */ 1467 1468 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ 1469 HOWTO (R_PPC64_DTPREL16_HIGHEST, 1470 48, /* rightshift */ 1471 1, /* size (0 = byte, 1 = short, 2 = long) */ 1472 16, /* bitsize */ 1473 FALSE, /* pc_relative */ 1474 0, /* bitpos */ 1475 complain_overflow_dont, /* complain_on_overflow */ 1476 ppc64_elf_unhandled_reloc, /* special_function */ 1477 "R_PPC64_DTPREL16_HIGHEST", /* name */ 1478 FALSE, /* partial_inplace */ 1479 0, /* src_mask */ 1480 0xffff, /* dst_mask */ 1481 FALSE), /* pcrel_offset */ 1482 1483 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ 1484 HOWTO (R_PPC64_DTPREL16_HIGHESTA, 1485 48, /* rightshift */ 1486 1, /* size (0 = byte, 1 = short, 2 = long) */ 1487 16, /* bitsize */ 1488 FALSE, /* pc_relative */ 1489 0, /* bitpos */ 1490 complain_overflow_dont, /* complain_on_overflow */ 1491 ppc64_elf_unhandled_reloc, /* special_function */ 1492 "R_PPC64_DTPREL16_HIGHESTA", /* name */ 1493 FALSE, /* partial_inplace */ 1494 0, /* src_mask */ 1495 0xffff, /* dst_mask */ 1496 FALSE), /* pcrel_offset */ 1497 1498 /* Like DTPREL16, but for insns with a DS field. */ 1499 HOWTO (R_PPC64_DTPREL16_DS, 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_signed, /* complain_on_overflow */ 1506 ppc64_elf_unhandled_reloc, /* special_function */ 1507 "R_PPC64_DTPREL16_DS", /* name */ 1508 FALSE, /* partial_inplace */ 1509 0, /* src_mask */ 1510 0xfffc, /* dst_mask */ 1511 FALSE), /* pcrel_offset */ 1512 1513 /* Like DTPREL16_DS, but no overflow. */ 1514 HOWTO (R_PPC64_DTPREL16_LO_DS, 1515 0, /* rightshift */ 1516 1, /* size (0 = byte, 1 = short, 2 = long) */ 1517 16, /* bitsize */ 1518 FALSE, /* pc_relative */ 1519 0, /* bitpos */ 1520 complain_overflow_dont, /* complain_on_overflow */ 1521 ppc64_elf_unhandled_reloc, /* special_function */ 1522 "R_PPC64_DTPREL16_LO_DS", /* name */ 1523 FALSE, /* partial_inplace */ 1524 0, /* src_mask */ 1525 0xfffc, /* dst_mask */ 1526 FALSE), /* pcrel_offset */ 1527 1528 /* Computes a tp-relative displacement, the difference between the value of 1529 sym+add and the value of the thread pointer (r13). */ 1530 HOWTO (R_PPC64_TPREL64, 1531 0, /* rightshift */ 1532 4, /* size (0 = byte, 1 = short, 2 = long) */ 1533 64, /* bitsize */ 1534 FALSE, /* pc_relative */ 1535 0, /* bitpos */ 1536 complain_overflow_dont, /* complain_on_overflow */ 1537 ppc64_elf_unhandled_reloc, /* special_function */ 1538 "R_PPC64_TPREL64", /* name */ 1539 FALSE, /* partial_inplace */ 1540 0, /* src_mask */ 1541 ONES (64), /* dst_mask */ 1542 FALSE), /* pcrel_offset */ 1543 1544 /* A 16 bit tprel reloc. */ 1545 HOWTO (R_PPC64_TPREL16, 1546 0, /* rightshift */ 1547 1, /* size (0 = byte, 1 = short, 2 = long) */ 1548 16, /* bitsize */ 1549 FALSE, /* pc_relative */ 1550 0, /* bitpos */ 1551 complain_overflow_signed, /* complain_on_overflow */ 1552 ppc64_elf_unhandled_reloc, /* special_function */ 1553 "R_PPC64_TPREL16", /* name */ 1554 FALSE, /* partial_inplace */ 1555 0, /* src_mask */ 1556 0xffff, /* dst_mask */ 1557 FALSE), /* pcrel_offset */ 1558 1559 /* Like TPREL16, but no overflow. */ 1560 HOWTO (R_PPC64_TPREL16_LO, 1561 0, /* rightshift */ 1562 1, /* size (0 = byte, 1 = short, 2 = long) */ 1563 16, /* bitsize */ 1564 FALSE, /* pc_relative */ 1565 0, /* bitpos */ 1566 complain_overflow_dont, /* complain_on_overflow */ 1567 ppc64_elf_unhandled_reloc, /* special_function */ 1568 "R_PPC64_TPREL16_LO", /* name */ 1569 FALSE, /* partial_inplace */ 1570 0, /* src_mask */ 1571 0xffff, /* dst_mask */ 1572 FALSE), /* pcrel_offset */ 1573 1574 /* Like TPREL16_LO, but next higher group of 16 bits. */ 1575 HOWTO (R_PPC64_TPREL16_HI, 1576 16, /* rightshift */ 1577 1, /* size (0 = byte, 1 = short, 2 = long) */ 1578 16, /* bitsize */ 1579 FALSE, /* pc_relative */ 1580 0, /* bitpos */ 1581 complain_overflow_signed, /* complain_on_overflow */ 1582 ppc64_elf_unhandled_reloc, /* special_function */ 1583 "R_PPC64_TPREL16_HI", /* name */ 1584 FALSE, /* partial_inplace */ 1585 0, /* src_mask */ 1586 0xffff, /* dst_mask */ 1587 FALSE), /* pcrel_offset */ 1588 1589 /* Like TPREL16_HI, but adjust for low 16 bits. */ 1590 HOWTO (R_PPC64_TPREL16_HA, 1591 16, /* rightshift */ 1592 1, /* size (0 = byte, 1 = short, 2 = long) */ 1593 16, /* bitsize */ 1594 FALSE, /* pc_relative */ 1595 0, /* bitpos */ 1596 complain_overflow_signed, /* complain_on_overflow */ 1597 ppc64_elf_unhandled_reloc, /* special_function */ 1598 "R_PPC64_TPREL16_HA", /* name */ 1599 FALSE, /* partial_inplace */ 1600 0, /* src_mask */ 1601 0xffff, /* dst_mask */ 1602 FALSE), /* pcrel_offset */ 1603 1604 /* Like TPREL16_HI, but next higher group of 16 bits. */ 1605 HOWTO (R_PPC64_TPREL16_HIGHER, 1606 32, /* rightshift */ 1607 1, /* size (0 = byte, 1 = short, 2 = long) */ 1608 16, /* bitsize */ 1609 FALSE, /* pc_relative */ 1610 0, /* bitpos */ 1611 complain_overflow_dont, /* complain_on_overflow */ 1612 ppc64_elf_unhandled_reloc, /* special_function */ 1613 "R_PPC64_TPREL16_HIGHER", /* name */ 1614 FALSE, /* partial_inplace */ 1615 0, /* src_mask */ 1616 0xffff, /* dst_mask */ 1617 FALSE), /* pcrel_offset */ 1618 1619 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ 1620 HOWTO (R_PPC64_TPREL16_HIGHERA, 1621 32, /* rightshift */ 1622 1, /* size (0 = byte, 1 = short, 2 = long) */ 1623 16, /* bitsize */ 1624 FALSE, /* pc_relative */ 1625 0, /* bitpos */ 1626 complain_overflow_dont, /* complain_on_overflow */ 1627 ppc64_elf_unhandled_reloc, /* special_function */ 1628 "R_PPC64_TPREL16_HIGHERA", /* name */ 1629 FALSE, /* partial_inplace */ 1630 0, /* src_mask */ 1631 0xffff, /* dst_mask */ 1632 FALSE), /* pcrel_offset */ 1633 1634 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ 1635 HOWTO (R_PPC64_TPREL16_HIGHEST, 1636 48, /* rightshift */ 1637 1, /* size (0 = byte, 1 = short, 2 = long) */ 1638 16, /* bitsize */ 1639 FALSE, /* pc_relative */ 1640 0, /* bitpos */ 1641 complain_overflow_dont, /* complain_on_overflow */ 1642 ppc64_elf_unhandled_reloc, /* special_function */ 1643 "R_PPC64_TPREL16_HIGHEST", /* name */ 1644 FALSE, /* partial_inplace */ 1645 0, /* src_mask */ 1646 0xffff, /* dst_mask */ 1647 FALSE), /* pcrel_offset */ 1648 1649 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ 1650 HOWTO (R_PPC64_TPREL16_HIGHESTA, 1651 48, /* rightshift */ 1652 1, /* size (0 = byte, 1 = short, 2 = long) */ 1653 16, /* bitsize */ 1654 FALSE, /* pc_relative */ 1655 0, /* bitpos */ 1656 complain_overflow_dont, /* complain_on_overflow */ 1657 ppc64_elf_unhandled_reloc, /* special_function */ 1658 "R_PPC64_TPREL16_HIGHESTA", /* name */ 1659 FALSE, /* partial_inplace */ 1660 0, /* src_mask */ 1661 0xffff, /* dst_mask */ 1662 FALSE), /* pcrel_offset */ 1663 1664 /* Like TPREL16, but for insns with a DS field. */ 1665 HOWTO (R_PPC64_TPREL16_DS, 1666 0, /* rightshift */ 1667 1, /* size (0 = byte, 1 = short, 2 = long) */ 1668 16, /* bitsize */ 1669 FALSE, /* pc_relative */ 1670 0, /* bitpos */ 1671 complain_overflow_signed, /* complain_on_overflow */ 1672 ppc64_elf_unhandled_reloc, /* special_function */ 1673 "R_PPC64_TPREL16_DS", /* name */ 1674 FALSE, /* partial_inplace */ 1675 0, /* src_mask */ 1676 0xfffc, /* dst_mask */ 1677 FALSE), /* pcrel_offset */ 1678 1679 /* Like TPREL16_DS, but no overflow. */ 1680 HOWTO (R_PPC64_TPREL16_LO_DS, 1681 0, /* rightshift */ 1682 1, /* size (0 = byte, 1 = short, 2 = long) */ 1683 16, /* bitsize */ 1684 FALSE, /* pc_relative */ 1685 0, /* bitpos */ 1686 complain_overflow_dont, /* complain_on_overflow */ 1687 ppc64_elf_unhandled_reloc, /* special_function */ 1688 "R_PPC64_TPREL16_LO_DS", /* name */ 1689 FALSE, /* partial_inplace */ 1690 0, /* src_mask */ 1691 0xfffc, /* dst_mask */ 1692 FALSE), /* pcrel_offset */ 1693 1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1695 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 1696 to the first entry relative to the TOC base (r2). */ 1697 HOWTO (R_PPC64_GOT_TLSGD16, 1698 0, /* rightshift */ 1699 1, /* size (0 = byte, 1 = short, 2 = long) */ 1700 16, /* bitsize */ 1701 FALSE, /* pc_relative */ 1702 0, /* bitpos */ 1703 complain_overflow_signed, /* complain_on_overflow */ 1704 ppc64_elf_unhandled_reloc, /* special_function */ 1705 "R_PPC64_GOT_TLSGD16", /* name */ 1706 FALSE, /* partial_inplace */ 1707 0, /* src_mask */ 1708 0xffff, /* dst_mask */ 1709 FALSE), /* pcrel_offset */ 1710 1711 /* Like GOT_TLSGD16, but no overflow. */ 1712 HOWTO (R_PPC64_GOT_TLSGD16_LO, 1713 0, /* rightshift */ 1714 1, /* size (0 = byte, 1 = short, 2 = long) */ 1715 16, /* bitsize */ 1716 FALSE, /* pc_relative */ 1717 0, /* bitpos */ 1718 complain_overflow_dont, /* complain_on_overflow */ 1719 ppc64_elf_unhandled_reloc, /* special_function */ 1720 "R_PPC64_GOT_TLSGD16_LO", /* name */ 1721 FALSE, /* partial_inplace */ 1722 0, /* src_mask */ 1723 0xffff, /* dst_mask */ 1724 FALSE), /* pcrel_offset */ 1725 1726 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1727 HOWTO (R_PPC64_GOT_TLSGD16_HI, 1728 16, /* rightshift */ 1729 1, /* size (0 = byte, 1 = short, 2 = long) */ 1730 16, /* bitsize */ 1731 FALSE, /* pc_relative */ 1732 0, /* bitpos */ 1733 complain_overflow_signed, /* complain_on_overflow */ 1734 ppc64_elf_unhandled_reloc, /* special_function */ 1735 "R_PPC64_GOT_TLSGD16_HI", /* name */ 1736 FALSE, /* partial_inplace */ 1737 0, /* src_mask */ 1738 0xffff, /* dst_mask */ 1739 FALSE), /* pcrel_offset */ 1740 1741 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1742 HOWTO (R_PPC64_GOT_TLSGD16_HA, 1743 16, /* rightshift */ 1744 1, /* size (0 = byte, 1 = short, 2 = long) */ 1745 16, /* bitsize */ 1746 FALSE, /* pc_relative */ 1747 0, /* bitpos */ 1748 complain_overflow_signed, /* complain_on_overflow */ 1749 ppc64_elf_unhandled_reloc, /* special_function */ 1750 "R_PPC64_GOT_TLSGD16_HA", /* name */ 1751 FALSE, /* partial_inplace */ 1752 0, /* src_mask */ 1753 0xffff, /* dst_mask */ 1754 FALSE), /* pcrel_offset */ 1755 1756 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1757 with values (sym+add)@dtpmod and zero, and computes the offset to the 1758 first entry relative to the TOC base (r2). */ 1759 HOWTO (R_PPC64_GOT_TLSLD16, 1760 0, /* rightshift */ 1761 1, /* size (0 = byte, 1 = short, 2 = long) */ 1762 16, /* bitsize */ 1763 FALSE, /* pc_relative */ 1764 0, /* bitpos */ 1765 complain_overflow_signed, /* complain_on_overflow */ 1766 ppc64_elf_unhandled_reloc, /* special_function */ 1767 "R_PPC64_GOT_TLSLD16", /* name */ 1768 FALSE, /* partial_inplace */ 1769 0, /* src_mask */ 1770 0xffff, /* dst_mask */ 1771 FALSE), /* pcrel_offset */ 1772 1773 /* Like GOT_TLSLD16, but no overflow. */ 1774 HOWTO (R_PPC64_GOT_TLSLD16_LO, 1775 0, /* rightshift */ 1776 1, /* size (0 = byte, 1 = short, 2 = long) */ 1777 16, /* bitsize */ 1778 FALSE, /* pc_relative */ 1779 0, /* bitpos */ 1780 complain_overflow_dont, /* complain_on_overflow */ 1781 ppc64_elf_unhandled_reloc, /* special_function */ 1782 "R_PPC64_GOT_TLSLD16_LO", /* name */ 1783 FALSE, /* partial_inplace */ 1784 0, /* src_mask */ 1785 0xffff, /* dst_mask */ 1786 FALSE), /* pcrel_offset */ 1787 1788 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1789 HOWTO (R_PPC64_GOT_TLSLD16_HI, 1790 16, /* rightshift */ 1791 1, /* size (0 = byte, 1 = short, 2 = long) */ 1792 16, /* bitsize */ 1793 FALSE, /* pc_relative */ 1794 0, /* bitpos */ 1795 complain_overflow_signed, /* complain_on_overflow */ 1796 ppc64_elf_unhandled_reloc, /* special_function */ 1797 "R_PPC64_GOT_TLSLD16_HI", /* name */ 1798 FALSE, /* partial_inplace */ 1799 0, /* src_mask */ 1800 0xffff, /* dst_mask */ 1801 FALSE), /* pcrel_offset */ 1802 1803 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1804 HOWTO (R_PPC64_GOT_TLSLD16_HA, 1805 16, /* rightshift */ 1806 1, /* size (0 = byte, 1 = short, 2 = long) */ 1807 16, /* bitsize */ 1808 FALSE, /* pc_relative */ 1809 0, /* bitpos */ 1810 complain_overflow_signed, /* complain_on_overflow */ 1811 ppc64_elf_unhandled_reloc, /* special_function */ 1812 "R_PPC64_GOT_TLSLD16_HA", /* name */ 1813 FALSE, /* partial_inplace */ 1814 0, /* src_mask */ 1815 0xffff, /* dst_mask */ 1816 FALSE), /* pcrel_offset */ 1817 1818 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1819 the offset to the entry relative to the TOC base (r2). */ 1820 HOWTO (R_PPC64_GOT_DTPREL16_DS, 1821 0, /* rightshift */ 1822 1, /* size (0 = byte, 1 = short, 2 = long) */ 1823 16, /* bitsize */ 1824 FALSE, /* pc_relative */ 1825 0, /* bitpos */ 1826 complain_overflow_signed, /* complain_on_overflow */ 1827 ppc64_elf_unhandled_reloc, /* special_function */ 1828 "R_PPC64_GOT_DTPREL16_DS", /* name */ 1829 FALSE, /* partial_inplace */ 1830 0, /* src_mask */ 1831 0xfffc, /* dst_mask */ 1832 FALSE), /* pcrel_offset */ 1833 1834 /* Like GOT_DTPREL16_DS, but no overflow. */ 1835 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, 1836 0, /* rightshift */ 1837 1, /* size (0 = byte, 1 = short, 2 = long) */ 1838 16, /* bitsize */ 1839 FALSE, /* pc_relative */ 1840 0, /* bitpos */ 1841 complain_overflow_dont, /* complain_on_overflow */ 1842 ppc64_elf_unhandled_reloc, /* special_function */ 1843 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ 1844 FALSE, /* partial_inplace */ 1845 0, /* src_mask */ 1846 0xfffc, /* dst_mask */ 1847 FALSE), /* pcrel_offset */ 1848 1849 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ 1850 HOWTO (R_PPC64_GOT_DTPREL16_HI, 1851 16, /* rightshift */ 1852 1, /* size (0 = byte, 1 = short, 2 = long) */ 1853 16, /* bitsize */ 1854 FALSE, /* pc_relative */ 1855 0, /* bitpos */ 1856 complain_overflow_signed, /* complain_on_overflow */ 1857 ppc64_elf_unhandled_reloc, /* special_function */ 1858 "R_PPC64_GOT_DTPREL16_HI", /* name */ 1859 FALSE, /* partial_inplace */ 1860 0, /* src_mask */ 1861 0xffff, /* dst_mask */ 1862 FALSE), /* pcrel_offset */ 1863 1864 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1865 HOWTO (R_PPC64_GOT_DTPREL16_HA, 1866 16, /* rightshift */ 1867 1, /* size (0 = byte, 1 = short, 2 = long) */ 1868 16, /* bitsize */ 1869 FALSE, /* pc_relative */ 1870 0, /* bitpos */ 1871 complain_overflow_signed, /* complain_on_overflow */ 1872 ppc64_elf_unhandled_reloc, /* special_function */ 1873 "R_PPC64_GOT_DTPREL16_HA", /* name */ 1874 FALSE, /* partial_inplace */ 1875 0, /* src_mask */ 1876 0xffff, /* dst_mask */ 1877 FALSE), /* pcrel_offset */ 1878 1879 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1880 offset to the entry relative to the TOC base (r2). */ 1881 HOWTO (R_PPC64_GOT_TPREL16_DS, 1882 0, /* rightshift */ 1883 1, /* size (0 = byte, 1 = short, 2 = long) */ 1884 16, /* bitsize */ 1885 FALSE, /* pc_relative */ 1886 0, /* bitpos */ 1887 complain_overflow_signed, /* complain_on_overflow */ 1888 ppc64_elf_unhandled_reloc, /* special_function */ 1889 "R_PPC64_GOT_TPREL16_DS", /* name */ 1890 FALSE, /* partial_inplace */ 1891 0, /* src_mask */ 1892 0xfffc, /* dst_mask */ 1893 FALSE), /* pcrel_offset */ 1894 1895 /* Like GOT_TPREL16_DS, but no overflow. */ 1896 HOWTO (R_PPC64_GOT_TPREL16_LO_DS, 1897 0, /* rightshift */ 1898 1, /* size (0 = byte, 1 = short, 2 = long) */ 1899 16, /* bitsize */ 1900 FALSE, /* pc_relative */ 1901 0, /* bitpos */ 1902 complain_overflow_dont, /* complain_on_overflow */ 1903 ppc64_elf_unhandled_reloc, /* special_function */ 1904 "R_PPC64_GOT_TPREL16_LO_DS", /* name */ 1905 FALSE, /* partial_inplace */ 1906 0, /* src_mask */ 1907 0xfffc, /* dst_mask */ 1908 FALSE), /* pcrel_offset */ 1909 1910 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ 1911 HOWTO (R_PPC64_GOT_TPREL16_HI, 1912 16, /* rightshift */ 1913 1, /* size (0 = byte, 1 = short, 2 = long) */ 1914 16, /* bitsize */ 1915 FALSE, /* pc_relative */ 1916 0, /* bitpos */ 1917 complain_overflow_signed, /* complain_on_overflow */ 1918 ppc64_elf_unhandled_reloc, /* special_function */ 1919 "R_PPC64_GOT_TPREL16_HI", /* name */ 1920 FALSE, /* partial_inplace */ 1921 0, /* src_mask */ 1922 0xffff, /* dst_mask */ 1923 FALSE), /* pcrel_offset */ 1924 1925 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1926 HOWTO (R_PPC64_GOT_TPREL16_HA, 1927 16, /* rightshift */ 1928 1, /* size (0 = byte, 1 = short, 2 = long) */ 1929 16, /* bitsize */ 1930 FALSE, /* pc_relative */ 1931 0, /* bitpos */ 1932 complain_overflow_signed, /* complain_on_overflow */ 1933 ppc64_elf_unhandled_reloc, /* special_function */ 1934 "R_PPC64_GOT_TPREL16_HA", /* name */ 1935 FALSE, /* partial_inplace */ 1936 0, /* src_mask */ 1937 0xffff, /* dst_mask */ 1938 FALSE), /* pcrel_offset */ 1939 1940 HOWTO (R_PPC64_JMP_IREL, /* type */ 1941 0, /* rightshift */ 1942 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 1943 0, /* bitsize */ 1944 FALSE, /* pc_relative */ 1945 0, /* bitpos */ 1946 complain_overflow_dont, /* complain_on_overflow */ 1947 ppc64_elf_unhandled_reloc, /* special_function */ 1948 "R_PPC64_JMP_IREL", /* name */ 1949 FALSE, /* partial_inplace */ 1950 0, /* src_mask */ 1951 0, /* dst_mask */ 1952 FALSE), /* pcrel_offset */ 1953 1954 HOWTO (R_PPC64_IRELATIVE, /* type */ 1955 0, /* rightshift */ 1956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 1957 64, /* bitsize */ 1958 FALSE, /* pc_relative */ 1959 0, /* bitpos */ 1960 complain_overflow_dont, /* complain_on_overflow */ 1961 bfd_elf_generic_reloc, /* special_function */ 1962 "R_PPC64_IRELATIVE", /* name */ 1963 FALSE, /* partial_inplace */ 1964 0, /* src_mask */ 1965 ONES (64), /* dst_mask */ 1966 FALSE), /* pcrel_offset */ 1967 1968 /* A 16 bit relative relocation. */ 1969 HOWTO (R_PPC64_REL16, /* type */ 1970 0, /* rightshift */ 1971 1, /* size (0 = byte, 1 = short, 2 = long) */ 1972 16, /* bitsize */ 1973 TRUE, /* pc_relative */ 1974 0, /* bitpos */ 1975 complain_overflow_signed, /* complain_on_overflow */ 1976 bfd_elf_generic_reloc, /* special_function */ 1977 "R_PPC64_REL16", /* name */ 1978 FALSE, /* partial_inplace */ 1979 0, /* src_mask */ 1980 0xffff, /* dst_mask */ 1981 TRUE), /* pcrel_offset */ 1982 1983 /* A 16 bit relative relocation without overflow. */ 1984 HOWTO (R_PPC64_REL16_LO, /* type */ 1985 0, /* rightshift */ 1986 1, /* size (0 = byte, 1 = short, 2 = long) */ 1987 16, /* bitsize */ 1988 TRUE, /* pc_relative */ 1989 0, /* bitpos */ 1990 complain_overflow_dont,/* complain_on_overflow */ 1991 bfd_elf_generic_reloc, /* special_function */ 1992 "R_PPC64_REL16_LO", /* name */ 1993 FALSE, /* partial_inplace */ 1994 0, /* src_mask */ 1995 0xffff, /* dst_mask */ 1996 TRUE), /* pcrel_offset */ 1997 1998 /* The high order 16 bits of a relative address. */ 1999 HOWTO (R_PPC64_REL16_HI, /* type */ 2000 16, /* rightshift */ 2001 1, /* size (0 = byte, 1 = short, 2 = long) */ 2002 16, /* bitsize */ 2003 TRUE, /* pc_relative */ 2004 0, /* bitpos */ 2005 complain_overflow_signed, /* complain_on_overflow */ 2006 bfd_elf_generic_reloc, /* special_function */ 2007 "R_PPC64_REL16_HI", /* name */ 2008 FALSE, /* partial_inplace */ 2009 0, /* src_mask */ 2010 0xffff, /* dst_mask */ 2011 TRUE), /* pcrel_offset */ 2012 2013 /* The high order 16 bits of a relative address, plus 1 if the contents of 2014 the low 16 bits, treated as a signed number, is negative. */ 2015 HOWTO (R_PPC64_REL16_HA, /* type */ 2016 16, /* rightshift */ 2017 1, /* size (0 = byte, 1 = short, 2 = long) */ 2018 16, /* bitsize */ 2019 TRUE, /* pc_relative */ 2020 0, /* bitpos */ 2021 complain_overflow_signed, /* complain_on_overflow */ 2022 ppc64_elf_ha_reloc, /* special_function */ 2023 "R_PPC64_REL16_HA", /* name */ 2024 FALSE, /* partial_inplace */ 2025 0, /* src_mask */ 2026 0xffff, /* dst_mask */ 2027 TRUE), /* pcrel_offset */ 2028 2029 /* Like R_PPC64_REL16_HA but for split field in addpcis. */ 2030 HOWTO (R_PPC64_REL16DX_HA, /* type */ 2031 16, /* rightshift */ 2032 2, /* size (0 = byte, 1 = short, 2 = long) */ 2033 16, /* bitsize */ 2034 TRUE, /* pc_relative */ 2035 0, /* bitpos */ 2036 complain_overflow_signed, /* complain_on_overflow */ 2037 ppc64_elf_ha_reloc, /* special_function */ 2038 "R_PPC64_REL16DX_HA", /* name */ 2039 FALSE, /* partial_inplace */ 2040 0, /* src_mask */ 2041 0x1fffc1, /* dst_mask */ 2042 TRUE), /* pcrel_offset */ 2043 2044 /* Like R_PPC64_ADDR16_HI, but no overflow. */ 2045 HOWTO (R_PPC64_ADDR16_HIGH, /* type */ 2046 16, /* rightshift */ 2047 1, /* size (0 = byte, 1 = short, 2 = long) */ 2048 16, /* bitsize */ 2049 FALSE, /* pc_relative */ 2050 0, /* bitpos */ 2051 complain_overflow_dont, /* complain_on_overflow */ 2052 bfd_elf_generic_reloc, /* special_function */ 2053 "R_PPC64_ADDR16_HIGH", /* name */ 2054 FALSE, /* partial_inplace */ 2055 0, /* src_mask */ 2056 0xffff, /* dst_mask */ 2057 FALSE), /* pcrel_offset */ 2058 2059 /* Like R_PPC64_ADDR16_HA, but no overflow. */ 2060 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */ 2061 16, /* rightshift */ 2062 1, /* size (0 = byte, 1 = short, 2 = long) */ 2063 16, /* bitsize */ 2064 FALSE, /* pc_relative */ 2065 0, /* bitpos */ 2066 complain_overflow_dont, /* complain_on_overflow */ 2067 ppc64_elf_ha_reloc, /* special_function */ 2068 "R_PPC64_ADDR16_HIGHA", /* name */ 2069 FALSE, /* partial_inplace */ 2070 0, /* src_mask */ 2071 0xffff, /* dst_mask */ 2072 FALSE), /* pcrel_offset */ 2073 2074 /* Like R_PPC64_DTPREL16_HI, but no overflow. */ 2075 HOWTO (R_PPC64_DTPREL16_HIGH, 2076 16, /* rightshift */ 2077 1, /* size (0 = byte, 1 = short, 2 = long) */ 2078 16, /* bitsize */ 2079 FALSE, /* pc_relative */ 2080 0, /* bitpos */ 2081 complain_overflow_dont, /* complain_on_overflow */ 2082 ppc64_elf_unhandled_reloc, /* special_function */ 2083 "R_PPC64_DTPREL16_HIGH", /* name */ 2084 FALSE, /* partial_inplace */ 2085 0, /* src_mask */ 2086 0xffff, /* dst_mask */ 2087 FALSE), /* pcrel_offset */ 2088 2089 /* Like R_PPC64_DTPREL16_HA, but no overflow. */ 2090 HOWTO (R_PPC64_DTPREL16_HIGHA, 2091 16, /* rightshift */ 2092 1, /* size (0 = byte, 1 = short, 2 = long) */ 2093 16, /* bitsize */ 2094 FALSE, /* pc_relative */ 2095 0, /* bitpos */ 2096 complain_overflow_dont, /* complain_on_overflow */ 2097 ppc64_elf_unhandled_reloc, /* special_function */ 2098 "R_PPC64_DTPREL16_HIGHA", /* name */ 2099 FALSE, /* partial_inplace */ 2100 0, /* src_mask */ 2101 0xffff, /* dst_mask */ 2102 FALSE), /* pcrel_offset */ 2103 2104 /* Like R_PPC64_TPREL16_HI, but no overflow. */ 2105 HOWTO (R_PPC64_TPREL16_HIGH, 2106 16, /* rightshift */ 2107 1, /* size (0 = byte, 1 = short, 2 = long) */ 2108 16, /* bitsize */ 2109 FALSE, /* pc_relative */ 2110 0, /* bitpos */ 2111 complain_overflow_dont, /* complain_on_overflow */ 2112 ppc64_elf_unhandled_reloc, /* special_function */ 2113 "R_PPC64_TPREL16_HIGH", /* name */ 2114 FALSE, /* partial_inplace */ 2115 0, /* src_mask */ 2116 0xffff, /* dst_mask */ 2117 FALSE), /* pcrel_offset */ 2118 2119 /* Like R_PPC64_TPREL16_HA, but no overflow. */ 2120 HOWTO (R_PPC64_TPREL16_HIGHA, 2121 16, /* rightshift */ 2122 1, /* size (0 = byte, 1 = short, 2 = long) */ 2123 16, /* bitsize */ 2124 FALSE, /* pc_relative */ 2125 0, /* bitpos */ 2126 complain_overflow_dont, /* complain_on_overflow */ 2127 ppc64_elf_unhandled_reloc, /* special_function */ 2128 "R_PPC64_TPREL16_HIGHA", /* name */ 2129 FALSE, /* partial_inplace */ 2130 0, /* src_mask */ 2131 0xffff, /* dst_mask */ 2132 FALSE), /* pcrel_offset */ 2133 2134 /* Marker reloc on ELFv2 large-model function entry. */ 2135 HOWTO (R_PPC64_ENTRY, 2136 0, /* rightshift */ 2137 2, /* size (0 = byte, 1 = short, 2 = long) */ 2138 32, /* bitsize */ 2139 FALSE, /* pc_relative */ 2140 0, /* bitpos */ 2141 complain_overflow_dont, /* complain_on_overflow */ 2142 bfd_elf_generic_reloc, /* special_function */ 2143 "R_PPC64_ENTRY", /* name */ 2144 FALSE, /* partial_inplace */ 2145 0, /* src_mask */ 2146 0, /* dst_mask */ 2147 FALSE), /* pcrel_offset */ 2148 2149 /* Like ADDR64, but use local entry point of function. */ 2150 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */ 2151 0, /* rightshift */ 2152 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 2153 64, /* bitsize */ 2154 FALSE, /* pc_relative */ 2155 0, /* bitpos */ 2156 complain_overflow_dont, /* complain_on_overflow */ 2157 bfd_elf_generic_reloc, /* special_function */ 2158 "R_PPC64_ADDR64_LOCAL", /* name */ 2159 FALSE, /* partial_inplace */ 2160 0, /* src_mask */ 2161 ONES (64), /* dst_mask */ 2162 FALSE), /* pcrel_offset */ 2163 2164 /* GNU extension to record C++ vtable hierarchy. */ 2165 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ 2166 0, /* rightshift */ 2167 0, /* size (0 = byte, 1 = short, 2 = long) */ 2168 0, /* bitsize */ 2169 FALSE, /* pc_relative */ 2170 0, /* bitpos */ 2171 complain_overflow_dont, /* complain_on_overflow */ 2172 NULL, /* special_function */ 2173 "R_PPC64_GNU_VTINHERIT", /* name */ 2174 FALSE, /* partial_inplace */ 2175 0, /* src_mask */ 2176 0, /* dst_mask */ 2177 FALSE), /* pcrel_offset */ 2178 2179 /* GNU extension to record C++ vtable member usage. */ 2180 HOWTO (R_PPC64_GNU_VTENTRY, /* type */ 2181 0, /* rightshift */ 2182 0, /* size (0 = byte, 1 = short, 2 = long) */ 2183 0, /* bitsize */ 2184 FALSE, /* pc_relative */ 2185 0, /* bitpos */ 2186 complain_overflow_dont, /* complain_on_overflow */ 2187 NULL, /* special_function */ 2188 "R_PPC64_GNU_VTENTRY", /* name */ 2189 FALSE, /* partial_inplace */ 2190 0, /* src_mask */ 2191 0, /* dst_mask */ 2192 FALSE), /* pcrel_offset */ 2193}; 2194 2195 2196/* Initialize the ppc64_elf_howto_table, so that linear accesses can 2197 be done. */ 2198 2199static void 2200ppc_howto_init (void) 2201{ 2202 unsigned int i, type; 2203 2204 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) 2205 { 2206 type = ppc64_elf_howto_raw[i].type; 2207 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table)); 2208 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; 2209 } 2210} 2211 2212static reloc_howto_type * 2213ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2214 bfd_reloc_code_real_type code) 2215{ 2216 enum elf_ppc64_reloc_type r = R_PPC64_NONE; 2217 2218 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 2219 /* Initialize howto table if needed. */ 2220 ppc_howto_init (); 2221 2222 switch (code) 2223 { 2224 default: 2225 return NULL; 2226 2227 case BFD_RELOC_NONE: r = R_PPC64_NONE; 2228 break; 2229 case BFD_RELOC_32: r = R_PPC64_ADDR32; 2230 break; 2231 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; 2232 break; 2233 case BFD_RELOC_16: r = R_PPC64_ADDR16; 2234 break; 2235 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; 2236 break; 2237 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; 2238 break; 2239 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH; 2240 break; 2241 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; 2242 break; 2243 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA; 2244 break; 2245 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; 2246 break; 2247 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; 2248 break; 2249 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; 2250 break; 2251 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; 2252 break; 2253 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; 2254 break; 2255 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; 2256 break; 2257 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; 2258 break; 2259 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; 2260 break; 2261 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; 2262 break; 2263 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; 2264 break; 2265 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; 2266 break; 2267 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; 2268 break; 2269 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; 2270 break; 2271 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; 2272 break; 2273 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; 2274 break; 2275 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; 2276 break; 2277 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; 2278 break; 2279 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; 2280 break; 2281 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; 2282 break; 2283 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; 2284 break; 2285 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; 2286 break; 2287 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; 2288 break; 2289 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; 2290 break; 2291 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; 2292 break; 2293 case BFD_RELOC_64: r = R_PPC64_ADDR64; 2294 break; 2295 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; 2296 break; 2297 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; 2298 break; 2299 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; 2300 break; 2301 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; 2302 break; 2303 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; 2304 break; 2305 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; 2306 break; 2307 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; 2308 break; 2309 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; 2310 break; 2311 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; 2312 break; 2313 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; 2314 break; 2315 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; 2316 break; 2317 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; 2318 break; 2319 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; 2320 break; 2321 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; 2322 break; 2323 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; 2324 break; 2325 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; 2326 break; 2327 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; 2328 break; 2329 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; 2330 break; 2331 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; 2332 break; 2333 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; 2334 break; 2335 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; 2336 break; 2337 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; 2338 break; 2339 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; 2340 break; 2341 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; 2342 break; 2343 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; 2344 break; 2345 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; 2346 break; 2347 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; 2348 break; 2349 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; 2350 break; 2351 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD; 2352 break; 2353 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD; 2354 break; 2355 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; 2356 break; 2357 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; 2358 break; 2359 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; 2360 break; 2361 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; 2362 break; 2363 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH; 2364 break; 2365 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; 2366 break; 2367 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA; 2368 break; 2369 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; 2370 break; 2371 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; 2372 break; 2373 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; 2374 break; 2375 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; 2376 break; 2377 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH; 2378 break; 2379 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; 2380 break; 2381 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA; 2382 break; 2383 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; 2384 break; 2385 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; 2386 break; 2387 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; 2388 break; 2389 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; 2390 break; 2391 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; 2392 break; 2393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; 2394 break; 2395 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; 2396 break; 2397 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; 2398 break; 2399 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; 2400 break; 2401 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; 2402 break; 2403 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; 2404 break; 2405 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; 2406 break; 2407 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; 2408 break; 2409 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; 2410 break; 2411 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; 2412 break; 2413 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; 2414 break; 2415 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; 2416 break; 2417 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; 2418 break; 2419 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; 2420 break; 2421 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; 2422 break; 2423 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; 2424 break; 2425 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; 2426 break; 2427 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; 2428 break; 2429 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; 2430 break; 2431 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; 2432 break; 2433 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; 2434 break; 2435 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; 2436 break; 2437 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; 2438 break; 2439 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; 2440 break; 2441 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16; 2442 break; 2443 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO; 2444 break; 2445 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI; 2446 break; 2447 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA; 2448 break; 2449 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA; 2450 break; 2451 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY; 2452 break; 2453 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL; 2454 break; 2455 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; 2456 break; 2457 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; 2458 break; 2459 } 2460 2461 return ppc64_elf_howto_table[r]; 2462}; 2463 2464static reloc_howto_type * 2465ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2466 const char *r_name) 2467{ 2468 unsigned int i; 2469 2470 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) 2471 if (ppc64_elf_howto_raw[i].name != NULL 2472 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) 2473 return &ppc64_elf_howto_raw[i]; 2474 2475 return NULL; 2476} 2477 2478/* Set the howto pointer for a PowerPC ELF reloc. */ 2479 2480static void 2481ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 2482 Elf_Internal_Rela *dst) 2483{ 2484 unsigned int type; 2485 2486 /* Initialize howto table if needed. */ 2487 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 2488 ppc_howto_init (); 2489 2490 type = ELF64_R_TYPE (dst->r_info); 2491 if (type >= ARRAY_SIZE (ppc64_elf_howto_table)) 2492 { 2493 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 2494 abfd, (int) type); 2495 type = R_PPC64_NONE; 2496 } 2497 cache_ptr->howto = ppc64_elf_howto_table[type]; 2498} 2499 2500/* Handle the R_PPC64_ADDR16_HA and similar relocs. */ 2501 2502static bfd_reloc_status_type 2503ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2504 void *data, asection *input_section, 2505 bfd *output_bfd, char **error_message) 2506{ 2507 enum elf_ppc64_reloc_type r_type; 2508 long insn; 2509 bfd_size_type octets; 2510 bfd_vma value; 2511 2512 /* If this is a relocatable link (output_bfd test tells us), just 2513 call the generic function. Any adjustment will be done at final 2514 link time. */ 2515 if (output_bfd != NULL) 2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2517 input_section, output_bfd, error_message); 2518 2519 /* Adjust the addend for sign extension of the low 16 bits. 2520 We won't actually be using the low 16 bits, so trashing them 2521 doesn't matter. */ 2522 reloc_entry->addend += 0x8000; 2523 r_type = reloc_entry->howto->type; 2524 if (r_type != R_PPC64_REL16DX_HA) 2525 return bfd_reloc_continue; 2526 2527 value = 0; 2528 if (!bfd_is_com_section (symbol->section)) 2529 value = symbol->value; 2530 value += (reloc_entry->addend 2531 + symbol->section->output_offset 2532 + symbol->section->output_section->vma); 2533 value -= (reloc_entry->address 2534 + input_section->output_offset 2535 + input_section->output_section->vma); 2536 value = (bfd_signed_vma) value >> 16; 2537 2538 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2539 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2540 insn &= ~0x1fffc1; 2541 insn |= (value & 0xffc1) | ((value & 0x3e) << 15); 2542 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2543 if (value + 0x8000 > 0xffff) 2544 return bfd_reloc_overflow; 2545 return bfd_reloc_ok; 2546} 2547 2548static bfd_reloc_status_type 2549ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2550 void *data, asection *input_section, 2551 bfd *output_bfd, char **error_message) 2552{ 2553 if (output_bfd != NULL) 2554 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2555 input_section, output_bfd, error_message); 2556 2557 if (strcmp (symbol->section->name, ".opd") == 0 2558 && (symbol->section->owner->flags & DYNAMIC) == 0) 2559 { 2560 bfd_vma dest = opd_entry_value (symbol->section, 2561 symbol->value + reloc_entry->addend, 2562 NULL, NULL, FALSE); 2563 if (dest != (bfd_vma) -1) 2564 reloc_entry->addend = dest - (symbol->value 2565 + symbol->section->output_section->vma 2566 + symbol->section->output_offset); 2567 } 2568 else 2569 { 2570 elf_symbol_type *elfsym = (elf_symbol_type *) symbol; 2571 2572 if (symbol->section->owner != abfd 2573 && symbol->section->owner != NULL 2574 && abiversion (symbol->section->owner) >= 2) 2575 { 2576 unsigned int i; 2577 2578 for (i = 0; i < symbol->section->owner->symcount; ++i) 2579 { 2580 asymbol *symdef = symbol->section->owner->outsymbols[i]; 2581 2582 if (strcmp (symdef->name, symbol->name) == 0) 2583 { 2584 elfsym = (elf_symbol_type *) symdef; 2585 break; 2586 } 2587 } 2588 } 2589 reloc_entry->addend 2590 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other); 2591 } 2592 return bfd_reloc_continue; 2593} 2594 2595static bfd_reloc_status_type 2596ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2597 void *data, asection *input_section, 2598 bfd *output_bfd, char **error_message) 2599{ 2600 long insn; 2601 enum elf_ppc64_reloc_type r_type; 2602 bfd_size_type octets; 2603 /* Assume 'at' branch hints. */ 2604 bfd_boolean is_isa_v2 = TRUE; 2605 2606 /* If this is a relocatable link (output_bfd test tells us), just 2607 call the generic function. Any adjustment will be done at final 2608 link time. */ 2609 if (output_bfd != NULL) 2610 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2611 input_section, output_bfd, error_message); 2612 2613 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2614 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2615 insn &= ~(0x01 << 21); 2616 r_type = reloc_entry->howto->type; 2617 if (r_type == R_PPC64_ADDR14_BRTAKEN 2618 || r_type == R_PPC64_REL14_BRTAKEN) 2619 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ 2620 2621 if (is_isa_v2) 2622 { 2623 /* Set 'a' bit. This is 0b00010 in BO field for branch 2624 on CR(BI) insns (BO == 001at or 011at), and 0b01000 2625 for branch on CTR insns (BO == 1a00t or 1a01t). */ 2626 if ((insn & (0x14 << 21)) == (0x04 << 21)) 2627 insn |= 0x02 << 21; 2628 else if ((insn & (0x14 << 21)) == (0x10 << 21)) 2629 insn |= 0x08 << 21; 2630 else 2631 goto out; 2632 } 2633 else 2634 { 2635 bfd_vma target = 0; 2636 bfd_vma from; 2637 2638 if (!bfd_is_com_section (symbol->section)) 2639 target = symbol->value; 2640 target += symbol->section->output_section->vma; 2641 target += symbol->section->output_offset; 2642 target += reloc_entry->addend; 2643 2644 from = (reloc_entry->address 2645 + input_section->output_offset 2646 + input_section->output_section->vma); 2647 2648 /* Invert 'y' bit if not the default. */ 2649 if ((bfd_signed_vma) (target - from) < 0) 2650 insn ^= 0x01 << 21; 2651 } 2652 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2653 out: 2654 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, 2655 input_section, output_bfd, error_message); 2656} 2657 2658static bfd_reloc_status_type 2659ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2660 void *data, asection *input_section, 2661 bfd *output_bfd, char **error_message) 2662{ 2663 /* If this is a relocatable link (output_bfd test tells us), just 2664 call the generic function. Any adjustment will be done at final 2665 link time. */ 2666 if (output_bfd != NULL) 2667 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2668 input_section, output_bfd, error_message); 2669 2670 /* Subtract the symbol section base address. */ 2671 reloc_entry->addend -= symbol->section->output_section->vma; 2672 return bfd_reloc_continue; 2673} 2674 2675static bfd_reloc_status_type 2676ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2677 void *data, asection *input_section, 2678 bfd *output_bfd, char **error_message) 2679{ 2680 /* If this is a relocatable link (output_bfd test tells us), just 2681 call the generic function. Any adjustment will be done at final 2682 link time. */ 2683 if (output_bfd != NULL) 2684 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2685 input_section, output_bfd, error_message); 2686 2687 /* Subtract the symbol section base address. */ 2688 reloc_entry->addend -= symbol->section->output_section->vma; 2689 2690 /* Adjust the addend for sign extension of the low 16 bits. */ 2691 reloc_entry->addend += 0x8000; 2692 return bfd_reloc_continue; 2693} 2694 2695static bfd_reloc_status_type 2696ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2697 void *data, asection *input_section, 2698 bfd *output_bfd, char **error_message) 2699{ 2700 bfd_vma TOCstart; 2701 2702 /* If this is a relocatable link (output_bfd test tells us), just 2703 call the generic function. Any adjustment will be done at final 2704 link time. */ 2705 if (output_bfd != NULL) 2706 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2707 input_section, output_bfd, error_message); 2708 2709 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2710 if (TOCstart == 0) 2711 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); 2712 2713 /* Subtract the TOC base address. */ 2714 reloc_entry->addend -= TOCstart + TOC_BASE_OFF; 2715 return bfd_reloc_continue; 2716} 2717 2718static bfd_reloc_status_type 2719ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2720 void *data, asection *input_section, 2721 bfd *output_bfd, char **error_message) 2722{ 2723 bfd_vma TOCstart; 2724 2725 /* If this is a relocatable link (output_bfd test tells us), just 2726 call the generic function. Any adjustment will be done at final 2727 link time. */ 2728 if (output_bfd != NULL) 2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2730 input_section, output_bfd, error_message); 2731 2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2733 if (TOCstart == 0) 2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); 2735 2736 /* Subtract the TOC base address. */ 2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF; 2738 2739 /* Adjust the addend for sign extension of the low 16 bits. */ 2740 reloc_entry->addend += 0x8000; 2741 return bfd_reloc_continue; 2742} 2743 2744static bfd_reloc_status_type 2745ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2746 void *data, asection *input_section, 2747 bfd *output_bfd, char **error_message) 2748{ 2749 bfd_vma TOCstart; 2750 bfd_size_type octets; 2751 2752 /* If this is a relocatable link (output_bfd test tells us), just 2753 call the generic function. Any adjustment will be done at final 2754 link time. */ 2755 if (output_bfd != NULL) 2756 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2757 input_section, output_bfd, error_message); 2758 2759 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2760 if (TOCstart == 0) 2761 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); 2762 2763 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2764 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); 2765 return bfd_reloc_ok; 2766} 2767 2768static bfd_reloc_status_type 2769ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2770 void *data, asection *input_section, 2771 bfd *output_bfd, char **error_message) 2772{ 2773 /* If this is a relocatable link (output_bfd test tells us), just 2774 call the generic function. Any adjustment will be done at final 2775 link time. */ 2776 if (output_bfd != NULL) 2777 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2778 input_section, output_bfd, error_message); 2779 2780 if (error_message != NULL) 2781 { 2782 static char buf[60]; 2783 sprintf (buf, "generic linker can't handle %s", 2784 reloc_entry->howto->name); 2785 *error_message = buf; 2786 } 2787 return bfd_reloc_dangerous; 2788} 2789 2790/* Track GOT entries needed for a given symbol. We might need more 2791 than one got entry per symbol. */ 2792struct got_entry 2793{ 2794 struct got_entry *next; 2795 2796 /* The symbol addend that we'll be placing in the GOT. */ 2797 bfd_vma addend; 2798 2799 /* Unlike other ELF targets, we use separate GOT entries for the same 2800 symbol referenced from different input files. This is to support 2801 automatic multiple TOC/GOT sections, where the TOC base can vary 2802 from one input file to another. After partitioning into TOC groups 2803 we merge entries within the group. 2804 2805 Point to the BFD owning this GOT entry. */ 2806 bfd *owner; 2807 2808 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, 2809 TLS_TPREL or TLS_DTPREL for tls entries. */ 2810 unsigned char tls_type; 2811 2812 /* Non-zero if got.ent points to real entry. */ 2813 unsigned char is_indirect; 2814 2815 /* Reference count until size_dynamic_sections, GOT offset thereafter. */ 2816 union 2817 { 2818 bfd_signed_vma refcount; 2819 bfd_vma offset; 2820 struct got_entry *ent; 2821 } got; 2822}; 2823 2824/* The same for PLT. */ 2825struct plt_entry 2826{ 2827 struct plt_entry *next; 2828 2829 bfd_vma addend; 2830 2831 union 2832 { 2833 bfd_signed_vma refcount; 2834 bfd_vma offset; 2835 } plt; 2836}; 2837 2838struct ppc64_elf_obj_tdata 2839{ 2840 struct elf_obj_tdata elf; 2841 2842 /* Shortcuts to dynamic linker sections. */ 2843 asection *got; 2844 asection *relgot; 2845 2846 /* Used during garbage collection. We attach global symbols defined 2847 on removed .opd entries to this section so that the sym is removed. */ 2848 asection *deleted_section; 2849 2850 /* TLS local dynamic got entry handling. Support for multiple GOT 2851 sections means we potentially need one of these for each input bfd. */ 2852 struct got_entry tlsld_got; 2853 2854 union { 2855 /* A copy of relocs before they are modified for --emit-relocs. */ 2856 Elf_Internal_Rela *relocs; 2857 2858 /* Section contents. */ 2859 bfd_byte *contents; 2860 } opd; 2861 2862 /* Nonzero if this bfd has small toc/got relocs, ie. that expect 2863 the reloc to be in the range -32768 to 32767. */ 2864 unsigned int has_small_toc_reloc : 1; 2865 2866 /* Set if toc/got ha relocs detected not using r2, or lo reloc 2867 instruction not one we handle. */ 2868 unsigned int unexpected_toc_insn : 1; 2869}; 2870 2871#define ppc64_elf_tdata(bfd) \ 2872 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) 2873 2874#define ppc64_tlsld_got(bfd) \ 2875 (&ppc64_elf_tdata (bfd)->tlsld_got) 2876 2877#define is_ppc64_elf(bfd) \ 2878 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2879 && elf_object_id (bfd) == PPC64_ELF_DATA) 2880 2881/* Override the generic function because we store some extras. */ 2882 2883static bfd_boolean 2884ppc64_elf_mkobject (bfd *abfd) 2885{ 2886 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata), 2887 PPC64_ELF_DATA); 2888} 2889 2890/* Fix bad default arch selected for a 64 bit input bfd when the 2891 default is 32 bit. Also select arch based on apuinfo. */ 2892 2893static bfd_boolean 2894ppc64_elf_object_p (bfd *abfd) 2895{ 2896 if (!abfd->arch_info->the_default) 2897 return TRUE; 2898 2899 if (abfd->arch_info->bits_per_word == 32) 2900 { 2901 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2902 2903 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) 2904 { 2905 /* Relies on arch after 32 bit default being 64 bit default. */ 2906 abfd->arch_info = abfd->arch_info->next; 2907 BFD_ASSERT (abfd->arch_info->bits_per_word == 64); 2908 } 2909 } 2910 return _bfd_elf_ppc_set_arch (abfd); 2911} 2912 2913/* Support for core dump NOTE sections. */ 2914 2915static bfd_boolean 2916ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2917{ 2918 size_t offset, size; 2919 2920 if (note->descsz != 504) 2921 return FALSE; 2922 2923 /* pr_cursig */ 2924 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2925 2926 /* pr_pid */ 2927 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); 2928 2929 /* pr_reg */ 2930 offset = 112; 2931 size = 384; 2932 2933 /* Make a ".reg/999" section. */ 2934 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2935 size, note->descpos + offset); 2936} 2937 2938static bfd_boolean 2939ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2940{ 2941 if (note->descsz != 136) 2942 return FALSE; 2943 2944 elf_tdata (abfd)->core->pid 2945 = bfd_get_32 (abfd, note->descdata + 24); 2946 elf_tdata (abfd)->core->program 2947 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 2948 elf_tdata (abfd)->core->command 2949 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 2950 2951 return TRUE; 2952} 2953 2954static char * 2955ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, 2956 ...) 2957{ 2958 switch (note_type) 2959 { 2960 default: 2961 return NULL; 2962 2963 case NT_PRPSINFO: 2964 { 2965 char data[136]; 2966 va_list ap; 2967 2968 va_start (ap, note_type); 2969 memset (data, 0, sizeof (data)); 2970 strncpy (data + 40, va_arg (ap, const char *), 16); 2971 strncpy (data + 56, va_arg (ap, const char *), 80); 2972 va_end (ap); 2973 return elfcore_write_note (abfd, buf, bufsiz, 2974 "CORE", note_type, data, sizeof (data)); 2975 } 2976 2977 case NT_PRSTATUS: 2978 { 2979 char data[504]; 2980 va_list ap; 2981 long pid; 2982 int cursig; 2983 const void *greg; 2984 2985 va_start (ap, note_type); 2986 memset (data, 0, 112); 2987 pid = va_arg (ap, long); 2988 bfd_put_32 (abfd, pid, data + 32); 2989 cursig = va_arg (ap, int); 2990 bfd_put_16 (abfd, cursig, data + 12); 2991 greg = va_arg (ap, const void *); 2992 memcpy (data + 112, greg, 384); 2993 memset (data + 496, 0, 8); 2994 va_end (ap); 2995 return elfcore_write_note (abfd, buf, bufsiz, 2996 "CORE", note_type, data, sizeof (data)); 2997 } 2998 } 2999} 3000 3001/* Add extra PPC sections. */ 3002 3003static const struct bfd_elf_special_section ppc64_elf_special_sections[]= 3004{ 3005 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, 3006 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3007 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3008 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3009 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3010 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3011 { NULL, 0, 0, 0, 0 } 3012}; 3013 3014enum _ppc64_sec_type { 3015 sec_normal = 0, 3016 sec_opd = 1, 3017 sec_toc = 2 3018}; 3019 3020struct _ppc64_elf_section_data 3021{ 3022 struct bfd_elf_section_data elf; 3023 3024 union 3025 { 3026 /* An array with one entry for each opd function descriptor, 3027 and some spares since opd entries may be either 16 or 24 bytes. */ 3028#define OPD_NDX(OFF) ((OFF) >> 4) 3029 struct _opd_sec_data 3030 { 3031 /* Points to the function code section for local opd entries. */ 3032 asection **func_sec; 3033 3034 /* After editing .opd, adjust references to opd local syms. */ 3035 long *adjust; 3036 } opd; 3037 3038 /* An array for toc sections, indexed by offset/8. */ 3039 struct _toc_sec_data 3040 { 3041 /* Specifies the relocation symbol index used at a given toc offset. */ 3042 unsigned *symndx; 3043 3044 /* And the relocation addend. */ 3045 bfd_vma *add; 3046 } toc; 3047 } u; 3048 3049 enum _ppc64_sec_type sec_type:2; 3050 3051 /* Flag set when small branches are detected. Used to 3052 select suitable defaults for the stub group size. */ 3053 unsigned int has_14bit_branch:1; 3054}; 3055 3056#define ppc64_elf_section_data(sec) \ 3057 ((struct _ppc64_elf_section_data *) elf_section_data (sec)) 3058 3059static bfd_boolean 3060ppc64_elf_new_section_hook (bfd *abfd, asection *sec) 3061{ 3062 if (!sec->used_by_bfd) 3063 { 3064 struct _ppc64_elf_section_data *sdata; 3065 bfd_size_type amt = sizeof (*sdata); 3066 3067 sdata = bfd_zalloc (abfd, amt); 3068 if (sdata == NULL) 3069 return FALSE; 3070 sec->used_by_bfd = sdata; 3071 } 3072 3073 return _bfd_elf_new_section_hook (abfd, sec); 3074} 3075 3076static struct _opd_sec_data * 3077get_opd_info (asection * sec) 3078{ 3079 if (sec != NULL 3080 && ppc64_elf_section_data (sec) != NULL 3081 && ppc64_elf_section_data (sec)->sec_type == sec_opd) 3082 return &ppc64_elf_section_data (sec)->u.opd; 3083 return NULL; 3084} 3085 3086/* Parameters for the qsort hook. */ 3087static bfd_boolean synthetic_relocatable; 3088 3089/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ 3090 3091static int 3092compare_symbols (const void *ap, const void *bp) 3093{ 3094 const asymbol *a = * (const asymbol **) ap; 3095 const asymbol *b = * (const asymbol **) bp; 3096 3097 /* Section symbols first. */ 3098 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) 3099 return -1; 3100 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) 3101 return 1; 3102 3103 /* then .opd symbols. */ 3104 if (strcmp (a->section->name, ".opd") == 0 3105 && strcmp (b->section->name, ".opd") != 0) 3106 return -1; 3107 if (strcmp (a->section->name, ".opd") != 0 3108 && strcmp (b->section->name, ".opd") == 0) 3109 return 1; 3110 3111 /* then other code symbols. */ 3112 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3113 == (SEC_CODE | SEC_ALLOC) 3114 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3115 != (SEC_CODE | SEC_ALLOC)) 3116 return -1; 3117 3118 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3119 != (SEC_CODE | SEC_ALLOC) 3120 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3121 == (SEC_CODE | SEC_ALLOC)) 3122 return 1; 3123 3124 if (synthetic_relocatable) 3125 { 3126 if (a->section->id < b->section->id) 3127 return -1; 3128 3129 if (a->section->id > b->section->id) 3130 return 1; 3131 } 3132 3133 if (a->value + a->section->vma < b->value + b->section->vma) 3134 return -1; 3135 3136 if (a->value + a->section->vma > b->value + b->section->vma) 3137 return 1; 3138 3139 /* For syms with the same value, prefer strong dynamic global function 3140 syms over other syms. */ 3141 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) 3142 return -1; 3143 3144 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) 3145 return 1; 3146 3147 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) 3148 return -1; 3149 3150 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) 3151 return 1; 3152 3153 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) 3154 return -1; 3155 3156 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) 3157 return 1; 3158 3159 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) 3160 return -1; 3161 3162 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) 3163 return 1; 3164 3165 return 0; 3166} 3167 3168/* Search SYMS for a symbol of the given VALUE. */ 3169 3170static asymbol * 3171sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value) 3172{ 3173 long mid; 3174 3175 if (id == (unsigned) -1) 3176 { 3177 while (lo < hi) 3178 { 3179 mid = (lo + hi) >> 1; 3180 if (syms[mid]->value + syms[mid]->section->vma < value) 3181 lo = mid + 1; 3182 else if (syms[mid]->value + syms[mid]->section->vma > value) 3183 hi = mid; 3184 else 3185 return syms[mid]; 3186 } 3187 } 3188 else 3189 { 3190 while (lo < hi) 3191 { 3192 mid = (lo + hi) >> 1; 3193 if (syms[mid]->section->id < id) 3194 lo = mid + 1; 3195 else if (syms[mid]->section->id > id) 3196 hi = mid; 3197 else if (syms[mid]->value < value) 3198 lo = mid + 1; 3199 else if (syms[mid]->value > value) 3200 hi = mid; 3201 else 3202 return syms[mid]; 3203 } 3204 } 3205 return NULL; 3206} 3207 3208static bfd_boolean 3209section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 3210{ 3211 bfd_vma vma = *(bfd_vma *) ptr; 3212 return ((section->flags & SEC_ALLOC) != 0 3213 && section->vma <= vma 3214 && vma < section->vma + section->size); 3215} 3216 3217/* Create synthetic symbols, effectively restoring "dot-symbol" function 3218 entry syms. Also generate @plt symbols for the glink branch table. 3219 Returns count of synthetic symbols in RET or -1 on error. */ 3220 3221static long 3222ppc64_elf_get_synthetic_symtab (bfd *abfd, 3223 long static_count, asymbol **static_syms, 3224 long dyn_count, asymbol **dyn_syms, 3225 asymbol **ret) 3226{ 3227 asymbol *s; 3228 long i; 3229 long count; 3230 char *names; 3231 long symcount, codesecsym, codesecsymend, secsymend, opdsymend; 3232 asection *opd = NULL; 3233 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; 3234 asymbol **syms; 3235 int abi = abiversion (abfd); 3236 3237 *ret = NULL; 3238 3239 if (abi < 2) 3240 { 3241 opd = bfd_get_section_by_name (abfd, ".opd"); 3242 if (opd == NULL && abi == 1) 3243 return 0; 3244 } 3245 3246 symcount = static_count; 3247 if (!relocatable) 3248 symcount += dyn_count; 3249 if (symcount == 0) 3250 return 0; 3251 3252 syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); 3253 if (syms == NULL) 3254 return -1; 3255 3256 if (!relocatable && static_count != 0 && dyn_count != 0) 3257 { 3258 /* Use both symbol tables. */ 3259 memcpy (syms, static_syms, static_count * sizeof (*syms)); 3260 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms)); 3261 } 3262 else if (!relocatable && static_count == 0) 3263 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); 3264 else 3265 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); 3266 3267 synthetic_relocatable = relocatable; 3268 qsort (syms, symcount, sizeof (*syms), compare_symbols); 3269 3270 if (!relocatable && symcount > 1) 3271 { 3272 long j; 3273 /* Trim duplicate syms, since we may have merged the normal and 3274 dynamic symbols. Actually, we only care about syms that have 3275 different values, so trim any with the same value. */ 3276 for (i = 1, j = 1; i < symcount; ++i) 3277 if (syms[i - 1]->value + syms[i - 1]->section->vma 3278 != syms[i]->value + syms[i]->section->vma) 3279 syms[j++] = syms[i]; 3280 symcount = j; 3281 } 3282 3283 i = 0; 3284 if (strcmp (syms[i]->section->name, ".opd") == 0) 3285 ++i; 3286 codesecsym = i; 3287 3288 for (; i < symcount; ++i) 3289 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3290 != (SEC_CODE | SEC_ALLOC)) 3291 || (syms[i]->flags & BSF_SECTION_SYM) == 0) 3292 break; 3293 codesecsymend = i; 3294 3295 for (; i < symcount; ++i) 3296 if ((syms[i]->flags & BSF_SECTION_SYM) == 0) 3297 break; 3298 secsymend = i; 3299 3300 for (; i < symcount; ++i) 3301 if (strcmp (syms[i]->section->name, ".opd") != 0) 3302 break; 3303 opdsymend = i; 3304 3305 for (; i < symcount; ++i) 3306 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) 3307 != (SEC_CODE | SEC_ALLOC)) 3308 break; 3309 symcount = i; 3310 3311 count = 0; 3312 3313 if (relocatable) 3314 { 3315 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 3316 arelent *r; 3317 size_t size; 3318 long relcount; 3319 3320 if (opdsymend == secsymend) 3321 goto done; 3322 3323 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3324 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; 3325 if (relcount == 0) 3326 goto done; 3327 3328 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE)) 3329 { 3330 count = -1; 3331 goto done; 3332 } 3333 3334 size = 0; 3335 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) 3336 { 3337 asymbol *sym; 3338 3339 while (r < opd->relocation + relcount 3340 && r->address < syms[i]->value + opd->vma) 3341 ++r; 3342 3343 if (r == opd->relocation + relcount) 3344 break; 3345 3346 if (r->address != syms[i]->value + opd->vma) 3347 continue; 3348 3349 if (r->howto->type != R_PPC64_ADDR64) 3350 continue; 3351 3352 sym = *r->sym_ptr_ptr; 3353 if (!sym_exists_at (syms, opdsymend, symcount, 3354 sym->section->id, sym->value + r->addend)) 3355 { 3356 ++count; 3357 size += sizeof (asymbol); 3358 size += strlen (syms[i]->name) + 2; 3359 } 3360 } 3361 3362 if (size == 0) 3363 goto done; 3364 s = *ret = bfd_malloc (size); 3365 if (s == NULL) 3366 { 3367 count = -1; 3368 goto done; 3369 } 3370 3371 names = (char *) (s + count); 3372 3373 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) 3374 { 3375 asymbol *sym; 3376 3377 while (r < opd->relocation + relcount 3378 && r->address < syms[i]->value + opd->vma) 3379 ++r; 3380 3381 if (r == opd->relocation + relcount) 3382 break; 3383 3384 if (r->address != syms[i]->value + opd->vma) 3385 continue; 3386 3387 if (r->howto->type != R_PPC64_ADDR64) 3388 continue; 3389 3390 sym = *r->sym_ptr_ptr; 3391 if (!sym_exists_at (syms, opdsymend, symcount, 3392 sym->section->id, sym->value + r->addend)) 3393 { 3394 size_t len; 3395 3396 *s = *syms[i]; 3397 s->flags |= BSF_SYNTHETIC; 3398 s->section = sym->section; 3399 s->value = sym->value + r->addend; 3400 s->name = names; 3401 *names++ = '.'; 3402 len = strlen (syms[i]->name); 3403 memcpy (names, syms[i]->name, len + 1); 3404 names += len + 1; 3405 /* Have udata.p point back to the original symbol this 3406 synthetic symbol was derived from. */ 3407 s->udata.p = syms[i]; 3408 s++; 3409 } 3410 } 3411 } 3412 else 3413 { 3414 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 3415 bfd_byte *contents = NULL; 3416 size_t size; 3417 long plt_count = 0; 3418 bfd_vma glink_vma = 0, resolv_vma = 0; 3419 asection *dynamic, *glink = NULL, *relplt = NULL; 3420 arelent *p; 3421 3422 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents)) 3423 { 3424 free_contents_and_exit_err: 3425 count = -1; 3426 free_contents_and_exit: 3427 if (contents) 3428 free (contents); 3429 goto done; 3430 } 3431 3432 size = 0; 3433 for (i = secsymend; i < opdsymend; ++i) 3434 { 3435 bfd_vma ent; 3436 3437 /* Ignore bogus symbols. */ 3438 if (syms[i]->value > opd->size - 8) 3439 continue; 3440 3441 ent = bfd_get_64 (abfd, contents + syms[i]->value); 3442 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) 3443 { 3444 ++count; 3445 size += sizeof (asymbol); 3446 size += strlen (syms[i]->name) + 2; 3447 } 3448 } 3449 3450 /* Get start of .glink stubs from DT_PPC64_GLINK. */ 3451 if (dyn_count != 0 3452 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL) 3453 { 3454 bfd_byte *dynbuf, *extdyn, *extdynend; 3455 size_t extdynsize; 3456 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 3457 3458 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 3459 goto free_contents_and_exit_err; 3460 3461 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 3462 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 3463 3464 extdyn = dynbuf; 3465 extdynend = extdyn + dynamic->size; 3466 for (; extdyn < extdynend; extdyn += extdynsize) 3467 { 3468 Elf_Internal_Dyn dyn; 3469 (*swap_dyn_in) (abfd, extdyn, &dyn); 3470 3471 if (dyn.d_tag == DT_NULL) 3472 break; 3473 3474 if (dyn.d_tag == DT_PPC64_GLINK) 3475 { 3476 /* The first glink stub starts at offset 32; see 3477 comment in ppc64_elf_finish_dynamic_sections. */ 3478 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4; 3479 /* The .glink section usually does not survive the final 3480 link; search for the section (usually .text) where the 3481 glink stubs now reside. */ 3482 glink = bfd_sections_find_if (abfd, section_covers_vma, 3483 &glink_vma); 3484 break; 3485 } 3486 } 3487 3488 free (dynbuf); 3489 } 3490 3491 if (glink != NULL) 3492 { 3493 /* Determine __glink trampoline by reading the relative branch 3494 from the first glink stub. */ 3495 bfd_byte buf[4]; 3496 unsigned int off = 0; 3497 3498 while (bfd_get_section_contents (abfd, glink, buf, 3499 glink_vma + off - glink->vma, 4)) 3500 { 3501 unsigned int insn = bfd_get_32 (abfd, buf); 3502 insn ^= B_DOT; 3503 if ((insn & ~0x3fffffc) == 0) 3504 { 3505 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000; 3506 break; 3507 } 3508 off += 4; 3509 if (off > 4) 3510 break; 3511 } 3512 3513 if (resolv_vma) 3514 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 3515 3516 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 3517 if (relplt != NULL) 3518 { 3519 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3520 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE)) 3521 goto free_contents_and_exit_err; 3522 3523 plt_count = relplt->size / sizeof (Elf64_External_Rela); 3524 size += plt_count * sizeof (asymbol); 3525 3526 p = relplt->relocation; 3527 for (i = 0; i < plt_count; i++, p++) 3528 { 3529 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 3530 if (p->addend != 0) 3531 size += sizeof ("+0x") - 1 + 16; 3532 } 3533 } 3534 } 3535 3536 if (size == 0) 3537 goto free_contents_and_exit; 3538 s = *ret = bfd_malloc (size); 3539 if (s == NULL) 3540 goto free_contents_and_exit_err; 3541 3542 names = (char *) (s + count + plt_count + (resolv_vma != 0)); 3543 3544 for (i = secsymend; i < opdsymend; ++i) 3545 { 3546 bfd_vma ent; 3547 3548 if (syms[i]->value > opd->size - 8) 3549 continue; 3550 3551 ent = bfd_get_64 (abfd, contents + syms[i]->value); 3552 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) 3553 { 3554 long lo, hi; 3555 size_t len; 3556 asection *sec = abfd->sections; 3557 3558 *s = *syms[i]; 3559 lo = codesecsym; 3560 hi = codesecsymend; 3561 while (lo < hi) 3562 { 3563 long mid = (lo + hi) >> 1; 3564 if (syms[mid]->section->vma < ent) 3565 lo = mid + 1; 3566 else if (syms[mid]->section->vma > ent) 3567 hi = mid; 3568 else 3569 { 3570 sec = syms[mid]->section; 3571 break; 3572 } 3573 } 3574 3575 if (lo >= hi && lo > codesecsym) 3576 sec = syms[lo - 1]->section; 3577 3578 for (; sec != NULL; sec = sec->next) 3579 { 3580 if (sec->vma > ent) 3581 break; 3582 /* SEC_LOAD may not be set if SEC is from a separate debug 3583 info file. */ 3584 if ((sec->flags & SEC_ALLOC) == 0) 3585 break; 3586 if ((sec->flags & SEC_CODE) != 0) 3587 s->section = sec; 3588 } 3589 s->flags |= BSF_SYNTHETIC; 3590 s->value = ent - s->section->vma; 3591 s->name = names; 3592 *names++ = '.'; 3593 len = strlen (syms[i]->name); 3594 memcpy (names, syms[i]->name, len + 1); 3595 names += len + 1; 3596 /* Have udata.p point back to the original symbol this 3597 synthetic symbol was derived from. */ 3598 s->udata.p = syms[i]; 3599 s++; 3600 } 3601 } 3602 free (contents); 3603 3604 if (glink != NULL && relplt != NULL) 3605 { 3606 if (resolv_vma) 3607 { 3608 /* Add a symbol for the main glink trampoline. */ 3609 memset (s, 0, sizeof *s); 3610 s->the_bfd = abfd; 3611 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3612 s->section = glink; 3613 s->value = resolv_vma - glink->vma; 3614 s->name = names; 3615 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3616 names += sizeof ("__glink_PLTresolve"); 3617 s++; 3618 count++; 3619 } 3620 3621 /* FIXME: It would be very much nicer to put sym@plt on the 3622 stub rather than on the glink branch table entry. The 3623 objdump disassembler would then use a sensible symbol 3624 name on plt calls. The difficulty in doing so is 3625 a) finding the stubs, and, 3626 b) matching stubs against plt entries, and, 3627 c) there can be multiple stubs for a given plt entry. 3628 3629 Solving (a) could be done by code scanning, but older 3630 ppc64 binaries used different stubs to current code. 3631 (b) is the tricky one since you need to known the toc 3632 pointer for at least one function that uses a pic stub to 3633 be able to calculate the plt address referenced. 3634 (c) means gdb would need to set multiple breakpoints (or 3635 find the glink branch itself) when setting breakpoints 3636 for pending shared library loads. */ 3637 p = relplt->relocation; 3638 for (i = 0; i < plt_count; i++, p++) 3639 { 3640 size_t len; 3641 3642 *s = **p->sym_ptr_ptr; 3643 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 3644 we are defining a symbol, ensure one of them is set. */ 3645 if ((s->flags & BSF_LOCAL) == 0) 3646 s->flags |= BSF_GLOBAL; 3647 s->flags |= BSF_SYNTHETIC; 3648 s->section = glink; 3649 s->value = glink_vma - glink->vma; 3650 s->name = names; 3651 s->udata.p = NULL; 3652 len = strlen ((*p->sym_ptr_ptr)->name); 3653 memcpy (names, (*p->sym_ptr_ptr)->name, len); 3654 names += len; 3655 if (p->addend != 0) 3656 { 3657 memcpy (names, "+0x", sizeof ("+0x") - 1); 3658 names += sizeof ("+0x") - 1; 3659 bfd_sprintf_vma (abfd, names, p->addend); 3660 names += strlen (names); 3661 } 3662 memcpy (names, "@plt", sizeof ("@plt")); 3663 names += sizeof ("@plt"); 3664 s++; 3665 if (abi < 2) 3666 { 3667 glink_vma += 8; 3668 if (i >= 0x8000) 3669 glink_vma += 4; 3670 } 3671 else 3672 glink_vma += 4; 3673 } 3674 count += plt_count; 3675 } 3676 } 3677 3678 done: 3679 free (syms); 3680 return count; 3681} 3682 3683/* The following functions are specific to the ELF linker, while 3684 functions above are used generally. Those named ppc64_elf_* are 3685 called by the main ELF linker code. They appear in this file more 3686 or less in the order in which they are called. eg. 3687 ppc64_elf_check_relocs is called early in the link process, 3688 ppc64_elf_finish_dynamic_sections is one of the last functions 3689 called. 3690 3691 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that 3692 functions have both a function code symbol and a function descriptor 3693 symbol. A call to foo in a relocatable object file looks like: 3694 3695 . .text 3696 . x: 3697 . bl .foo 3698 . nop 3699 3700 The function definition in another object file might be: 3701 3702 . .section .opd 3703 . foo: .quad .foo 3704 . .quad .TOC.@tocbase 3705 . .quad 0 3706 . 3707 . .text 3708 . .foo: blr 3709 3710 When the linker resolves the call during a static link, the branch 3711 unsurprisingly just goes to .foo and the .opd information is unused. 3712 If the function definition is in a shared library, things are a little 3713 different: The call goes via a plt call stub, the opd information gets 3714 copied to the plt, and the linker patches the nop. 3715 3716 . x: 3717 . bl .foo_stub 3718 . ld 2,40(1) 3719 . 3720 . 3721 . .foo_stub: 3722 . std 2,40(1) # in practice, the call stub 3723 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but 3724 . addi 11,11,Lfoo@toc@l # this is the general idea 3725 . ld 12,0(11) 3726 . ld 2,8(11) 3727 . mtctr 12 3728 . ld 11,16(11) 3729 . bctr 3730 . 3731 . .section .plt 3732 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) 3733 3734 The "reloc ()" notation is supposed to indicate that the linker emits 3735 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd 3736 copying. 3737 3738 What are the difficulties here? Well, firstly, the relocations 3739 examined by the linker in check_relocs are against the function code 3740 sym .foo, while the dynamic relocation in the plt is emitted against 3741 the function descriptor symbol, foo. Somewhere along the line, we need 3742 to carefully copy dynamic link information from one symbol to the other. 3743 Secondly, the generic part of the elf linker will make .foo a dynamic 3744 symbol as is normal for most other backends. We need foo dynamic 3745 instead, at least for an application final link. However, when 3746 creating a shared library containing foo, we need to have both symbols 3747 dynamic so that references to .foo are satisfied during the early 3748 stages of linking. Otherwise the linker might decide to pull in a 3749 definition from some other object, eg. a static library. 3750 3751 Update: As of August 2004, we support a new convention. Function 3752 calls may use the function descriptor symbol, ie. "bl foo". This 3753 behaves exactly as "bl .foo". */ 3754 3755/* Of those relocs that might be copied as dynamic relocs, this function 3756 selects those that must be copied when linking a shared library, 3757 even when the symbol is local. */ 3758 3759static int 3760must_be_dyn_reloc (struct bfd_link_info *info, 3761 enum elf_ppc64_reloc_type r_type) 3762{ 3763 switch (r_type) 3764 { 3765 default: 3766 return 1; 3767 3768 case R_PPC64_REL32: 3769 case R_PPC64_REL64: 3770 case R_PPC64_REL30: 3771 return 0; 3772 3773 case R_PPC64_TPREL16: 3774 case R_PPC64_TPREL16_LO: 3775 case R_PPC64_TPREL16_HI: 3776 case R_PPC64_TPREL16_HA: 3777 case R_PPC64_TPREL16_DS: 3778 case R_PPC64_TPREL16_LO_DS: 3779 case R_PPC64_TPREL16_HIGH: 3780 case R_PPC64_TPREL16_HIGHA: 3781 case R_PPC64_TPREL16_HIGHER: 3782 case R_PPC64_TPREL16_HIGHERA: 3783 case R_PPC64_TPREL16_HIGHEST: 3784 case R_PPC64_TPREL16_HIGHESTA: 3785 case R_PPC64_TPREL64: 3786 return !bfd_link_executable (info); 3787 } 3788} 3789 3790/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3791 copying dynamic variables from a shared lib into an app's dynbss 3792 section, and instead use a dynamic relocation to point into the 3793 shared lib. With code that gcc generates, it's vital that this be 3794 enabled; In the PowerPC64 ABI, the address of a function is actually 3795 the address of a function descriptor, which resides in the .opd 3796 section. gcc uses the descriptor directly rather than going via the 3797 GOT as some other ABI's do, which means that initialized function 3798 pointers must reference the descriptor. Thus, a function pointer 3799 initialized to the address of a function in a shared library will 3800 either require a copy reloc, or a dynamic reloc. Using a copy reloc 3801 redefines the function descriptor symbol to point to the copy. This 3802 presents a problem as a plt entry for that function is also 3803 initialized from the function descriptor symbol and the copy reloc 3804 may not be initialized first. */ 3805#define ELIMINATE_COPY_RELOCS 1 3806 3807/* Section name for stubs is the associated section name plus this 3808 string. */ 3809#define STUB_SUFFIX ".stub" 3810 3811/* Linker stubs. 3812 ppc_stub_long_branch: 3813 Used when a 14 bit branch (or even a 24 bit branch) can't reach its 3814 destination, but a 24 bit branch in a stub section will reach. 3815 . b dest 3816 3817 ppc_stub_plt_branch: 3818 Similar to the above, but a 24 bit branch in the stub section won't 3819 reach its destination. 3820 . addis %r11,%r2,xxx@toc@ha 3821 . ld %r12,xxx@toc@l(%r11) 3822 . mtctr %r12 3823 . bctr 3824 3825 ppc_stub_plt_call: 3826 Used to call a function in a shared library. If it so happens that 3827 the plt entry referenced crosses a 64k boundary, then an extra 3828 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr". 3829 . std %r2,40(%r1) 3830 . addis %r11,%r2,xxx@toc@ha 3831 . ld %r12,xxx+0@toc@l(%r11) 3832 . mtctr %r12 3833 . ld %r2,xxx+8@toc@l(%r11) 3834 . ld %r11,xxx+16@toc@l(%r11) 3835 . bctr 3836 3837 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional 3838 code to adjust the value and save r2 to support multiple toc sections. 3839 A ppc_stub_long_branch with an r2 offset looks like: 3840 . std %r2,40(%r1) 3841 . addis %r2,%r2,off@ha 3842 . addi %r2,%r2,off@l 3843 . b dest 3844 3845 A ppc_stub_plt_branch with an r2 offset looks like: 3846 . std %r2,40(%r1) 3847 . addis %r11,%r2,xxx@toc@ha 3848 . ld %r12,xxx@toc@l(%r11) 3849 . addis %r2,%r2,off@ha 3850 . addi %r2,%r2,off@l 3851 . mtctr %r12 3852 . bctr 3853 3854 In cases where the "addis" instruction would add zero, the "addis" is 3855 omitted and following instructions modified slightly in some cases. 3856*/ 3857 3858enum ppc_stub_type { 3859 ppc_stub_none, 3860 ppc_stub_long_branch, 3861 ppc_stub_long_branch_r2off, 3862 ppc_stub_plt_branch, 3863 ppc_stub_plt_branch_r2off, 3864 ppc_stub_plt_call, 3865 ppc_stub_plt_call_r2save, 3866 ppc_stub_global_entry, 3867 ppc_stub_save_res 3868}; 3869 3870/* Information on stub grouping. */ 3871struct map_stub 3872{ 3873 /* The stub section. */ 3874 asection *stub_sec; 3875 /* This is the section to which stubs in the group will be attached. */ 3876 asection *link_sec; 3877 /* Next group. */ 3878 struct map_stub *next; 3879 /* Whether to emit a copy of register save/restore functions in this 3880 group. */ 3881 int needs_save_res; 3882}; 3883 3884struct ppc_stub_hash_entry { 3885 3886 /* Base hash table entry structure. */ 3887 struct bfd_hash_entry root; 3888 3889 enum ppc_stub_type stub_type; 3890 3891 /* Group information. */ 3892 struct map_stub *group; 3893 3894 /* Offset within stub_sec of the beginning of this stub. */ 3895 bfd_vma stub_offset; 3896 3897 /* Given the symbol's value and its section we can determine its final 3898 value when building the stubs (so the stub knows where to jump. */ 3899 bfd_vma target_value; 3900 asection *target_section; 3901 3902 /* The symbol table entry, if any, that this was derived from. */ 3903 struct ppc_link_hash_entry *h; 3904 struct plt_entry *plt_ent; 3905 3906 /* Symbol st_other. */ 3907 unsigned char other; 3908}; 3909 3910struct ppc_branch_hash_entry { 3911 3912 /* Base hash table entry structure. */ 3913 struct bfd_hash_entry root; 3914 3915 /* Offset within branch lookup table. */ 3916 unsigned int offset; 3917 3918 /* Generation marker. */ 3919 unsigned int iter; 3920}; 3921 3922/* Used to track dynamic relocations for local symbols. */ 3923struct ppc_dyn_relocs 3924{ 3925 struct ppc_dyn_relocs *next; 3926 3927 /* The input section of the reloc. */ 3928 asection *sec; 3929 3930 /* Total number of relocs copied for the input section. */ 3931 unsigned int count : 31; 3932 3933 /* Whether this entry is for STT_GNU_IFUNC symbols. */ 3934 unsigned int ifunc : 1; 3935}; 3936 3937struct ppc_link_hash_entry 3938{ 3939 struct elf_link_hash_entry elf; 3940 3941 union { 3942 /* A pointer to the most recently used stub hash entry against this 3943 symbol. */ 3944 struct ppc_stub_hash_entry *stub_cache; 3945 3946 /* A pointer to the next symbol starting with a '.' */ 3947 struct ppc_link_hash_entry *next_dot_sym; 3948 } u; 3949 3950 /* Track dynamic relocs copied for this symbol. */ 3951 struct elf_dyn_relocs *dyn_relocs; 3952 3953 /* Link between function code and descriptor symbols. */ 3954 struct ppc_link_hash_entry *oh; 3955 3956 /* Flag function code and descriptor symbols. */ 3957 unsigned int is_func:1; 3958 unsigned int is_func_descriptor:1; 3959 unsigned int fake:1; 3960 3961 /* Whether global opd/toc sym has been adjusted or not. 3962 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag 3963 should be set for all globals defined in any opd/toc section. */ 3964 unsigned int adjust_done:1; 3965 3966 /* Set if we twiddled this symbol to weak at some stage. */ 3967 unsigned int was_undefined:1; 3968 3969 /* Set if this is an out-of-line register save/restore function, 3970 with non-standard calling convention. */ 3971 unsigned int save_res:1; 3972 3973 /* Contexts in which symbol is used in the GOT (or TOC). 3974 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the 3975 corresponding relocs are encountered during check_relocs. 3976 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3977 indicate the corresponding GOT entry type is not needed. 3978 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into 3979 a TPREL one. We use a separate flag rather than setting TPREL 3980 just for convenience in distinguishing the two cases. */ 3981#define TLS_GD 1 /* GD reloc. */ 3982#define TLS_LD 2 /* LD reloc. */ 3983#define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3984#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3985#define TLS_TLS 16 /* Any TLS reloc. */ 3986#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ 3987#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ 3988#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */ 3989 unsigned char tls_mask; 3990}; 3991 3992/* ppc64 ELF linker hash table. */ 3993 3994struct ppc_link_hash_table 3995{ 3996 struct elf_link_hash_table elf; 3997 3998 /* The stub hash table. */ 3999 struct bfd_hash_table stub_hash_table; 4000 4001 /* Another hash table for plt_branch stubs. */ 4002 struct bfd_hash_table branch_hash_table; 4003 4004 /* Hash table for function prologue tocsave. */ 4005 htab_t tocsave_htab; 4006 4007 /* Various options and other info passed from the linker. */ 4008 struct ppc64_elf_params *params; 4009 4010 /* The size of sec_info below. */ 4011 unsigned int sec_info_arr_size; 4012 4013 /* Per-section array of extra section info. Done this way rather 4014 than as part of ppc64_elf_section_data so we have the info for 4015 non-ppc64 sections. */ 4016 struct 4017 { 4018 /* Along with elf_gp, specifies the TOC pointer used by this section. */ 4019 bfd_vma toc_off; 4020 4021 union 4022 { 4023 /* The section group that this section belongs to. */ 4024 struct map_stub *group; 4025 /* A temp section list pointer. */ 4026 asection *list; 4027 } u; 4028 } *sec_info; 4029 4030 /* Linked list of groups. */ 4031 struct map_stub *group; 4032 4033 /* Temp used when calculating TOC pointers. */ 4034 bfd_vma toc_curr; 4035 bfd *toc_bfd; 4036 asection *toc_first_sec; 4037 4038 /* Used when adding symbols. */ 4039 struct ppc_link_hash_entry *dot_syms; 4040 4041 /* Shortcuts to get to dynamic linker sections. */ 4042 asection *dynbss; 4043 asection *relbss; 4044 asection *glink; 4045 asection *sfpr; 4046 asection *brlt; 4047 asection *relbrlt; 4048 asection *glink_eh_frame; 4049 4050 /* Shortcut to .__tls_get_addr and __tls_get_addr. */ 4051 struct ppc_link_hash_entry *tls_get_addr; 4052 struct ppc_link_hash_entry *tls_get_addr_fd; 4053 4054 /* The size of reliplt used by got entry relocs. */ 4055 bfd_size_type got_reli_size; 4056 4057 /* Statistics. */ 4058 unsigned long stub_count[ppc_stub_global_entry]; 4059 4060 /* Number of stubs against global syms. */ 4061 unsigned long stub_globals; 4062 4063 /* Set if we're linking code with function descriptors. */ 4064 unsigned int opd_abi:1; 4065 4066 /* Support for multiple toc sections. */ 4067 unsigned int do_multi_toc:1; 4068 unsigned int multi_toc_needed:1; 4069 unsigned int second_toc_pass:1; 4070 unsigned int do_toc_opt:1; 4071 4072 /* Set on error. */ 4073 unsigned int stub_error:1; 4074 4075 /* Temp used by ppc64_elf_before_check_relocs. */ 4076 unsigned int twiddled_syms:1; 4077 4078 /* Incremented every time we size stubs. */ 4079 unsigned int stub_iteration; 4080 4081 /* Small local sym cache. */ 4082 struct sym_cache sym_cache; 4083}; 4084 4085/* Rename some of the generic section flags to better document how they 4086 are used here. */ 4087 4088/* Nonzero if this section has TLS related relocations. */ 4089#define has_tls_reloc sec_flg0 4090 4091/* Nonzero if this section has a call to __tls_get_addr. */ 4092#define has_tls_get_addr_call sec_flg1 4093 4094/* Nonzero if this section has any toc or got relocs. */ 4095#define has_toc_reloc sec_flg2 4096 4097/* Nonzero if this section has a call to another section that uses 4098 the toc or got. */ 4099#define makes_toc_func_call sec_flg3 4100 4101/* Recursion protection when determining above flag. */ 4102#define call_check_in_progress sec_flg4 4103#define call_check_done sec_flg5 4104 4105/* Get the ppc64 ELF linker hash table from a link_info structure. */ 4106 4107#define ppc_hash_table(p) \ 4108 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 4109 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL) 4110 4111#define ppc_stub_hash_lookup(table, string, create, copy) \ 4112 ((struct ppc_stub_hash_entry *) \ 4113 bfd_hash_lookup ((table), (string), (create), (copy))) 4114 4115#define ppc_branch_hash_lookup(table, string, create, copy) \ 4116 ((struct ppc_branch_hash_entry *) \ 4117 bfd_hash_lookup ((table), (string), (create), (copy))) 4118 4119/* Create an entry in the stub hash table. */ 4120 4121static struct bfd_hash_entry * 4122stub_hash_newfunc (struct bfd_hash_entry *entry, 4123 struct bfd_hash_table *table, 4124 const char *string) 4125{ 4126 /* Allocate the structure if it has not already been allocated by a 4127 subclass. */ 4128 if (entry == NULL) 4129 { 4130 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); 4131 if (entry == NULL) 4132 return entry; 4133 } 4134 4135 /* Call the allocation method of the superclass. */ 4136 entry = bfd_hash_newfunc (entry, table, string); 4137 if (entry != NULL) 4138 { 4139 struct ppc_stub_hash_entry *eh; 4140 4141 /* Initialize the local fields. */ 4142 eh = (struct ppc_stub_hash_entry *) entry; 4143 eh->stub_type = ppc_stub_none; 4144 eh->group = NULL; 4145 eh->stub_offset = 0; 4146 eh->target_value = 0; 4147 eh->target_section = NULL; 4148 eh->h = NULL; 4149 eh->plt_ent = NULL; 4150 eh->other = 0; 4151 } 4152 4153 return entry; 4154} 4155 4156/* Create an entry in the branch hash table. */ 4157 4158static struct bfd_hash_entry * 4159branch_hash_newfunc (struct bfd_hash_entry *entry, 4160 struct bfd_hash_table *table, 4161 const char *string) 4162{ 4163 /* Allocate the structure if it has not already been allocated by a 4164 subclass. */ 4165 if (entry == NULL) 4166 { 4167 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); 4168 if (entry == NULL) 4169 return entry; 4170 } 4171 4172 /* Call the allocation method of the superclass. */ 4173 entry = bfd_hash_newfunc (entry, table, string); 4174 if (entry != NULL) 4175 { 4176 struct ppc_branch_hash_entry *eh; 4177 4178 /* Initialize the local fields. */ 4179 eh = (struct ppc_branch_hash_entry *) entry; 4180 eh->offset = 0; 4181 eh->iter = 0; 4182 } 4183 4184 return entry; 4185} 4186 4187/* Create an entry in a ppc64 ELF linker hash table. */ 4188 4189static struct bfd_hash_entry * 4190link_hash_newfunc (struct bfd_hash_entry *entry, 4191 struct bfd_hash_table *table, 4192 const char *string) 4193{ 4194 /* Allocate the structure if it has not already been allocated by a 4195 subclass. */ 4196 if (entry == NULL) 4197 { 4198 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); 4199 if (entry == NULL) 4200 return entry; 4201 } 4202 4203 /* Call the allocation method of the superclass. */ 4204 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 4205 if (entry != NULL) 4206 { 4207 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; 4208 4209 memset (&eh->u.stub_cache, 0, 4210 (sizeof (struct ppc_link_hash_entry) 4211 - offsetof (struct ppc_link_hash_entry, u.stub_cache))); 4212 4213 /* When making function calls, old ABI code references function entry 4214 points (dot symbols), while new ABI code references the function 4215 descriptor symbol. We need to make any combination of reference and 4216 definition work together, without breaking archive linking. 4217 4218 For a defined function "foo" and an undefined call to "bar": 4219 An old object defines "foo" and ".foo", references ".bar" (possibly 4220 "bar" too). 4221 A new object defines "foo" and references "bar". 4222 4223 A new object thus has no problem with its undefined symbols being 4224 satisfied by definitions in an old object. On the other hand, the 4225 old object won't have ".bar" satisfied by a new object. 4226 4227 Keep a list of newly added dot-symbols. */ 4228 4229 if (string[0] == '.') 4230 { 4231 struct ppc_link_hash_table *htab; 4232 4233 htab = (struct ppc_link_hash_table *) table; 4234 eh->u.next_dot_sym = htab->dot_syms; 4235 htab->dot_syms = eh; 4236 } 4237 } 4238 4239 return entry; 4240} 4241 4242struct tocsave_entry { 4243 asection *sec; 4244 bfd_vma offset; 4245}; 4246 4247static hashval_t 4248tocsave_htab_hash (const void *p) 4249{ 4250 const struct tocsave_entry *e = (const struct tocsave_entry *) p; 4251 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3; 4252} 4253 4254static int 4255tocsave_htab_eq (const void *p1, const void *p2) 4256{ 4257 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1; 4258 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2; 4259 return e1->sec == e2->sec && e1->offset == e2->offset; 4260} 4261 4262/* Destroy a ppc64 ELF linker hash table. */ 4263 4264static void 4265ppc64_elf_link_hash_table_free (bfd *obfd) 4266{ 4267 struct ppc_link_hash_table *htab; 4268 4269 htab = (struct ppc_link_hash_table *) obfd->link.hash; 4270 if (htab->tocsave_htab) 4271 htab_delete (htab->tocsave_htab); 4272 bfd_hash_table_free (&htab->branch_hash_table); 4273 bfd_hash_table_free (&htab->stub_hash_table); 4274 _bfd_elf_link_hash_table_free (obfd); 4275} 4276 4277/* Create a ppc64 ELF linker hash table. */ 4278 4279static struct bfd_link_hash_table * 4280ppc64_elf_link_hash_table_create (bfd *abfd) 4281{ 4282 struct ppc_link_hash_table *htab; 4283 bfd_size_type amt = sizeof (struct ppc_link_hash_table); 4284 4285 htab = bfd_zmalloc (amt); 4286 if (htab == NULL) 4287 return NULL; 4288 4289 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, 4290 sizeof (struct ppc_link_hash_entry), 4291 PPC64_ELF_DATA)) 4292 { 4293 free (htab); 4294 return NULL; 4295 } 4296 4297 /* Init the stub hash table too. */ 4298 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, 4299 sizeof (struct ppc_stub_hash_entry))) 4300 { 4301 _bfd_elf_link_hash_table_free (abfd); 4302 return NULL; 4303 } 4304 4305 /* And the branch hash table. */ 4306 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, 4307 sizeof (struct ppc_branch_hash_entry))) 4308 { 4309 bfd_hash_table_free (&htab->stub_hash_table); 4310 _bfd_elf_link_hash_table_free (abfd); 4311 return NULL; 4312 } 4313 4314 htab->tocsave_htab = htab_try_create (1024, 4315 tocsave_htab_hash, 4316 tocsave_htab_eq, 4317 NULL); 4318 if (htab->tocsave_htab == NULL) 4319 { 4320 ppc64_elf_link_hash_table_free (abfd); 4321 return NULL; 4322 } 4323 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free; 4324 4325 /* Initializing two fields of the union is just cosmetic. We really 4326 only care about glist, but when compiled on a 32-bit host the 4327 bfd_vma fields are larger. Setting the bfd_vma to zero makes 4328 debugger inspection of these fields look nicer. */ 4329 htab->elf.init_got_refcount.refcount = 0; 4330 htab->elf.init_got_refcount.glist = NULL; 4331 htab->elf.init_plt_refcount.refcount = 0; 4332 htab->elf.init_plt_refcount.glist = NULL; 4333 htab->elf.init_got_offset.offset = 0; 4334 htab->elf.init_got_offset.glist = NULL; 4335 htab->elf.init_plt_offset.offset = 0; 4336 htab->elf.init_plt_offset.glist = NULL; 4337 4338 return &htab->elf.root; 4339} 4340 4341/* Create sections for linker generated code. */ 4342 4343static bfd_boolean 4344create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) 4345{ 4346 struct ppc_link_hash_table *htab; 4347 flagword flags; 4348 4349 htab = ppc_hash_table (info); 4350 4351 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY 4352 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4353 if (htab->params->save_restore_funcs) 4354 { 4355 /* Create .sfpr for code to save and restore fp regs. */ 4356 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", 4357 flags); 4358 if (htab->sfpr == NULL 4359 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) 4360 return FALSE; 4361 } 4362 4363 if (bfd_link_relocatable (info)) 4364 return TRUE; 4365 4366 /* Create .glink for lazy dynamic linking support. */ 4367 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", 4368 flags); 4369 if (htab->glink == NULL 4370 || ! bfd_set_section_alignment (dynobj, htab->glink, 3)) 4371 return FALSE; 4372 4373 if (!info->no_ld_generated_unwind_info) 4374 { 4375 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 4376 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4377 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj, 4378 ".eh_frame", 4379 flags); 4380 if (htab->glink_eh_frame == NULL 4381 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2)) 4382 return FALSE; 4383 } 4384 4385 flags = SEC_ALLOC | SEC_LINKER_CREATED; 4386 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags); 4387 if (htab->elf.iplt == NULL 4388 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3)) 4389 return FALSE; 4390 4391 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY 4392 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4393 htab->elf.irelplt 4394 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags); 4395 if (htab->elf.irelplt == NULL 4396 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3)) 4397 return FALSE; 4398 4399 /* Create branch lookup table for plt_branch stubs. */ 4400 flags = (SEC_ALLOC | SEC_LOAD 4401 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4402 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", 4403 flags); 4404 if (htab->brlt == NULL 4405 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3)) 4406 return FALSE; 4407 4408 if (!bfd_link_pic (info)) 4409 return TRUE; 4410 4411 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY 4412 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4413 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj, 4414 ".rela.branch_lt", 4415 flags); 4416 if (htab->relbrlt == NULL 4417 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) 4418 return FALSE; 4419 4420 return TRUE; 4421} 4422 4423/* Satisfy the ELF linker by filling in some fields in our fake bfd. */ 4424 4425bfd_boolean 4426ppc64_elf_init_stub_bfd (struct bfd_link_info *info, 4427 struct ppc64_elf_params *params) 4428{ 4429 struct ppc_link_hash_table *htab; 4430 4431 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64; 4432 4433/* Always hook our dynamic sections into the first bfd, which is the 4434 linker created stub bfd. This ensures that the GOT header is at 4435 the start of the output TOC section. */ 4436 htab = ppc_hash_table (info); 4437 htab->elf.dynobj = params->stub_bfd; 4438 htab->params = params; 4439 4440 return create_linkage_sections (htab->elf.dynobj, info); 4441} 4442 4443/* Build a name for an entry in the stub hash table. */ 4444 4445static char * 4446ppc_stub_name (const asection *input_section, 4447 const asection *sym_sec, 4448 const struct ppc_link_hash_entry *h, 4449 const Elf_Internal_Rela *rel) 4450{ 4451 char *stub_name; 4452 ssize_t len; 4453 4454 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 4455 offsets from a sym as a branch target? In fact, we could 4456 probably assume the addend is always zero. */ 4457 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); 4458 4459 if (h) 4460 { 4461 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; 4462 stub_name = bfd_malloc (len); 4463 if (stub_name == NULL) 4464 return stub_name; 4465 4466 len = sprintf (stub_name, "%08x.%s+%x", 4467 input_section->id & 0xffffffff, 4468 h->elf.root.root.string, 4469 (int) rel->r_addend & 0xffffffff); 4470 } 4471 else 4472 { 4473 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; 4474 stub_name = bfd_malloc (len); 4475 if (stub_name == NULL) 4476 return stub_name; 4477 4478 len = sprintf (stub_name, "%08x.%x:%x+%x", 4479 input_section->id & 0xffffffff, 4480 sym_sec->id & 0xffffffff, 4481 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, 4482 (int) rel->r_addend & 0xffffffff); 4483 } 4484 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0') 4485 stub_name[len - 2] = 0; 4486 return stub_name; 4487} 4488 4489/* Look up an entry in the stub hash. Stub entries are cached because 4490 creating the stub name takes a bit of time. */ 4491 4492static struct ppc_stub_hash_entry * 4493ppc_get_stub_entry (const asection *input_section, 4494 const asection *sym_sec, 4495 struct ppc_link_hash_entry *h, 4496 const Elf_Internal_Rela *rel, 4497 struct ppc_link_hash_table *htab) 4498{ 4499 struct ppc_stub_hash_entry *stub_entry; 4500 struct map_stub *group; 4501 4502 /* If this input section is part of a group of sections sharing one 4503 stub section, then use the id of the first section in the group. 4504 Stub names need to include a section id, as there may well be 4505 more than one stub used to reach say, printf, and we need to 4506 distinguish between them. */ 4507 group = htab->sec_info[input_section->id].u.group; 4508 4509 if (h != NULL && h->u.stub_cache != NULL 4510 && h->u.stub_cache->h == h 4511 && h->u.stub_cache->group == group) 4512 { 4513 stub_entry = h->u.stub_cache; 4514 } 4515 else 4516 { 4517 char *stub_name; 4518 4519 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel); 4520 if (stub_name == NULL) 4521 return NULL; 4522 4523 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, 4524 stub_name, FALSE, FALSE); 4525 if (h != NULL) 4526 h->u.stub_cache = stub_entry; 4527 4528 free (stub_name); 4529 } 4530 4531 return stub_entry; 4532} 4533 4534/* Add a new stub entry to the stub hash. Not all fields of the new 4535 stub entry are initialised. */ 4536 4537static struct ppc_stub_hash_entry * 4538ppc_add_stub (const char *stub_name, 4539 asection *section, 4540 struct bfd_link_info *info) 4541{ 4542 struct ppc_link_hash_table *htab = ppc_hash_table (info); 4543 struct map_stub *group; 4544 asection *link_sec; 4545 asection *stub_sec; 4546 struct ppc_stub_hash_entry *stub_entry; 4547 4548 group = htab->sec_info[section->id].u.group; 4549 link_sec = group->link_sec; 4550 stub_sec = group->stub_sec; 4551 if (stub_sec == NULL) 4552 { 4553 size_t namelen; 4554 bfd_size_type len; 4555 char *s_name; 4556 4557 namelen = strlen (link_sec->name); 4558 len = namelen + sizeof (STUB_SUFFIX); 4559 s_name = bfd_alloc (htab->params->stub_bfd, len); 4560 if (s_name == NULL) 4561 return NULL; 4562 4563 memcpy (s_name, link_sec->name, namelen); 4564 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); 4565 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec); 4566 if (stub_sec == NULL) 4567 return NULL; 4568 group->stub_sec = stub_sec; 4569 } 4570 4571 /* Enter this entry into the linker stub hash table. */ 4572 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, 4573 TRUE, FALSE); 4574 if (stub_entry == NULL) 4575 { 4576 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"), 4577 section->owner, stub_name); 4578 return NULL; 4579 } 4580 4581 stub_entry->group = group; 4582 stub_entry->stub_offset = 0; 4583 return stub_entry; 4584} 4585 4586/* Create .got and .rela.got sections in ABFD, and .got in dynobj if 4587 not already done. */ 4588 4589static bfd_boolean 4590create_got_section (bfd *abfd, struct bfd_link_info *info) 4591{ 4592 asection *got, *relgot; 4593 flagword flags; 4594 struct ppc_link_hash_table *htab = ppc_hash_table (info); 4595 4596 if (!is_ppc64_elf (abfd)) 4597 return FALSE; 4598 if (htab == NULL) 4599 return FALSE; 4600 4601 if (!htab->elf.sgot 4602 && !_bfd_elf_create_got_section (htab->elf.dynobj, info)) 4603 return FALSE; 4604 4605 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 4606 | SEC_LINKER_CREATED); 4607 4608 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 4609 if (!got 4610 || !bfd_set_section_alignment (abfd, got, 3)) 4611 return FALSE; 4612 4613 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", 4614 flags | SEC_READONLY); 4615 if (!relgot 4616 || ! bfd_set_section_alignment (abfd, relgot, 3)) 4617 return FALSE; 4618 4619 ppc64_elf_tdata (abfd)->got = got; 4620 ppc64_elf_tdata (abfd)->relgot = relgot; 4621 return TRUE; 4622} 4623 4624/* Create the dynamic sections, and set up shortcuts. */ 4625 4626static bfd_boolean 4627ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 4628{ 4629 struct ppc_link_hash_table *htab; 4630 4631 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 4632 return FALSE; 4633 4634 htab = ppc_hash_table (info); 4635 if (htab == NULL) 4636 return FALSE; 4637 4638 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss"); 4639 if (!bfd_link_pic (info)) 4640 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss"); 4641 4642 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss 4643 || (!bfd_link_pic (info) && !htab->relbss)) 4644 abort (); 4645 4646 return TRUE; 4647} 4648 4649/* Follow indirect and warning symbol links. */ 4650 4651static inline struct bfd_link_hash_entry * 4652follow_link (struct bfd_link_hash_entry *h) 4653{ 4654 while (h->type == bfd_link_hash_indirect 4655 || h->type == bfd_link_hash_warning) 4656 h = h->u.i.link; 4657 return h; 4658} 4659 4660static inline struct elf_link_hash_entry * 4661elf_follow_link (struct elf_link_hash_entry *h) 4662{ 4663 return (struct elf_link_hash_entry *) follow_link (&h->root); 4664} 4665 4666static inline struct ppc_link_hash_entry * 4667ppc_follow_link (struct ppc_link_hash_entry *h) 4668{ 4669 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root); 4670} 4671 4672/* Merge PLT info on FROM with that on TO. */ 4673 4674static void 4675move_plt_plist (struct ppc_link_hash_entry *from, 4676 struct ppc_link_hash_entry *to) 4677{ 4678 if (from->elf.plt.plist != NULL) 4679 { 4680 if (to->elf.plt.plist != NULL) 4681 { 4682 struct plt_entry **entp; 4683 struct plt_entry *ent; 4684 4685 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) 4686 { 4687 struct plt_entry *dent; 4688 4689 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) 4690 if (dent->addend == ent->addend) 4691 { 4692 dent->plt.refcount += ent->plt.refcount; 4693 *entp = ent->next; 4694 break; 4695 } 4696 if (dent == NULL) 4697 entp = &ent->next; 4698 } 4699 *entp = to->elf.plt.plist; 4700 } 4701 4702 to->elf.plt.plist = from->elf.plt.plist; 4703 from->elf.plt.plist = NULL; 4704 } 4705} 4706 4707/* Copy the extra info we tack onto an elf_link_hash_entry. */ 4708 4709static void 4710ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, 4711 struct elf_link_hash_entry *dir, 4712 struct elf_link_hash_entry *ind) 4713{ 4714 struct ppc_link_hash_entry *edir, *eind; 4715 4716 edir = (struct ppc_link_hash_entry *) dir; 4717 eind = (struct ppc_link_hash_entry *) ind; 4718 4719 edir->is_func |= eind->is_func; 4720 edir->is_func_descriptor |= eind->is_func_descriptor; 4721 edir->tls_mask |= eind->tls_mask; 4722 if (eind->oh != NULL) 4723 edir->oh = ppc_follow_link (eind->oh); 4724 4725 /* If called to transfer flags for a weakdef during processing 4726 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF. 4727 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 4728 if (!(ELIMINATE_COPY_RELOCS 4729 && eind->elf.root.type != bfd_link_hash_indirect 4730 && edir->elf.dynamic_adjusted)) 4731 edir->elf.non_got_ref |= eind->elf.non_got_ref; 4732 4733 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 4734 edir->elf.ref_regular |= eind->elf.ref_regular; 4735 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 4736 edir->elf.needs_plt |= eind->elf.needs_plt; 4737 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 4738 4739 /* Copy over any dynamic relocs we may have on the indirect sym. */ 4740 if (eind->dyn_relocs != NULL) 4741 { 4742 if (edir->dyn_relocs != NULL) 4743 { 4744 struct elf_dyn_relocs **pp; 4745 struct elf_dyn_relocs *p; 4746 4747 /* Add reloc counts against the indirect sym to the direct sym 4748 list. Merge any entries against the same section. */ 4749 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 4750 { 4751 struct elf_dyn_relocs *q; 4752 4753 for (q = edir->dyn_relocs; q != NULL; q = q->next) 4754 if (q->sec == p->sec) 4755 { 4756 q->pc_count += p->pc_count; 4757 q->count += p->count; 4758 *pp = p->next; 4759 break; 4760 } 4761 if (q == NULL) 4762 pp = &p->next; 4763 } 4764 *pp = edir->dyn_relocs; 4765 } 4766 4767 edir->dyn_relocs = eind->dyn_relocs; 4768 eind->dyn_relocs = NULL; 4769 } 4770 4771 /* If we were called to copy over info for a weak sym, that's all. 4772 You might think dyn_relocs need not be copied over; After all, 4773 both syms will be dynamic or both non-dynamic so we're just 4774 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 4775 code in ppc64_elf_adjust_dynamic_symbol needs to check for 4776 dyn_relocs in read-only sections, and it does so on what is the 4777 DIR sym here. */ 4778 if (eind->elf.root.type != bfd_link_hash_indirect) 4779 return; 4780 4781 /* Copy over got entries that we may have already seen to the 4782 symbol which just became indirect. */ 4783 if (eind->elf.got.glist != NULL) 4784 { 4785 if (edir->elf.got.glist != NULL) 4786 { 4787 struct got_entry **entp; 4788 struct got_entry *ent; 4789 4790 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) 4791 { 4792 struct got_entry *dent; 4793 4794 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) 4795 if (dent->addend == ent->addend 4796 && dent->owner == ent->owner 4797 && dent->tls_type == ent->tls_type) 4798 { 4799 dent->got.refcount += ent->got.refcount; 4800 *entp = ent->next; 4801 break; 4802 } 4803 if (dent == NULL) 4804 entp = &ent->next; 4805 } 4806 *entp = edir->elf.got.glist; 4807 } 4808 4809 edir->elf.got.glist = eind->elf.got.glist; 4810 eind->elf.got.glist = NULL; 4811 } 4812 4813 /* And plt entries. */ 4814 move_plt_plist (eind, edir); 4815 4816 if (eind->elf.dynindx != -1) 4817 { 4818 if (edir->elf.dynindx != -1) 4819 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 4820 edir->elf.dynstr_index); 4821 edir->elf.dynindx = eind->elf.dynindx; 4822 edir->elf.dynstr_index = eind->elf.dynstr_index; 4823 eind->elf.dynindx = -1; 4824 eind->elf.dynstr_index = 0; 4825 } 4826} 4827 4828/* Find the function descriptor hash entry from the given function code 4829 hash entry FH. Link the entries via their OH fields. */ 4830 4831static struct ppc_link_hash_entry * 4832lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) 4833{ 4834 struct ppc_link_hash_entry *fdh = fh->oh; 4835 4836 if (fdh == NULL) 4837 { 4838 const char *fd_name = fh->elf.root.root.string + 1; 4839 4840 fdh = (struct ppc_link_hash_entry *) 4841 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); 4842 if (fdh == NULL) 4843 return fdh; 4844 4845 fdh->is_func_descriptor = 1; 4846 fdh->oh = fh; 4847 fh->is_func = 1; 4848 fh->oh = fdh; 4849 } 4850 4851 return ppc_follow_link (fdh); 4852} 4853 4854/* Make a fake function descriptor sym for the code sym FH. */ 4855 4856static struct ppc_link_hash_entry * 4857make_fdh (struct bfd_link_info *info, 4858 struct ppc_link_hash_entry *fh) 4859{ 4860 bfd *abfd; 4861 asymbol *newsym; 4862 struct bfd_link_hash_entry *bh; 4863 struct ppc_link_hash_entry *fdh; 4864 4865 abfd = fh->elf.root.u.undef.abfd; 4866 newsym = bfd_make_empty_symbol (abfd); 4867 newsym->name = fh->elf.root.root.string + 1; 4868 newsym->section = bfd_und_section_ptr; 4869 newsym->value = 0; 4870 newsym->flags = BSF_WEAK; 4871 4872 bh = NULL; 4873 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name, 4874 newsym->flags, newsym->section, 4875 newsym->value, NULL, FALSE, FALSE, 4876 &bh)) 4877 return NULL; 4878 4879 fdh = (struct ppc_link_hash_entry *) bh; 4880 fdh->elf.non_elf = 0; 4881 fdh->fake = 1; 4882 fdh->is_func_descriptor = 1; 4883 fdh->oh = fh; 4884 fh->is_func = 1; 4885 fh->oh = fdh; 4886 return fdh; 4887} 4888 4889/* Fix function descriptor symbols defined in .opd sections to be 4890 function type. */ 4891 4892static bfd_boolean 4893ppc64_elf_add_symbol_hook (bfd *ibfd, 4894 struct bfd_link_info *info, 4895 Elf_Internal_Sym *isym, 4896 const char **name, 4897 flagword *flags ATTRIBUTE_UNUSED, 4898 asection **sec, 4899 bfd_vma *value) 4900{ 4901 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC 4902 && (ibfd->flags & DYNAMIC) == 0 4903 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 4904 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 4905 4906 if (*sec != NULL 4907 && strcmp ((*sec)->name, ".opd") == 0) 4908 { 4909 asection *code_sec; 4910 4911 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC 4912 || ELF_ST_TYPE (isym->st_info) == STT_FUNC)) 4913 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); 4914 4915 /* If the symbol is a function defined in .opd, and the function 4916 code is in a discarded group, let it appear to be undefined. */ 4917 if (!bfd_link_relocatable (info) 4918 && (*sec)->reloc_count != 0 4919 && opd_entry_value (*sec, *value, &code_sec, NULL, 4920 FALSE) != (bfd_vma) -1 4921 && discarded_section (code_sec)) 4922 { 4923 *sec = bfd_und_section_ptr; 4924 isym->st_shndx = SHN_UNDEF; 4925 } 4926 } 4927 else if (*sec != NULL 4928 && strcmp ((*sec)->name, ".toc") == 0 4929 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT) 4930 { 4931 struct ppc_link_hash_table *htab = ppc_hash_table (info); 4932 if (htab != NULL) 4933 htab->params->object_in_toc = 1; 4934 } 4935 4936 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) 4937 { 4938 if (abiversion (ibfd) == 0) 4939 set_abiversion (ibfd, 2); 4940 else if (abiversion (ibfd) == 1) 4941 { 4942 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other" 4943 " for ABI version 1\n"), name); 4944 bfd_set_error (bfd_error_bad_value); 4945 return FALSE; 4946 } 4947 } 4948 4949 return TRUE; 4950} 4951 4952/* Merge non-visibility st_other attributes: local entry point. */ 4953 4954static void 4955ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, 4956 const Elf_Internal_Sym *isym, 4957 bfd_boolean definition, 4958 bfd_boolean dynamic) 4959{ 4960 if (definition && !dynamic) 4961 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) 4962 | ELF_ST_VISIBILITY (h->other)); 4963} 4964 4965/* This function makes an old ABI object reference to ".bar" cause the 4966 inclusion of a new ABI object archive that defines "bar". 4967 NAME is a symbol defined in an archive. Return a symbol in the hash 4968 table that might be satisfied by the archive symbols. */ 4969 4970static struct elf_link_hash_entry * 4971ppc64_elf_archive_symbol_lookup (bfd *abfd, 4972 struct bfd_link_info *info, 4973 const char *name) 4974{ 4975 struct elf_link_hash_entry *h; 4976 char *dot_name; 4977 size_t len; 4978 4979 h = _bfd_elf_archive_symbol_lookup (abfd, info, name); 4980 if (h != NULL 4981 /* Don't return this sym if it is a fake function descriptor 4982 created by add_symbol_adjust. */ 4983 && !(h->root.type == bfd_link_hash_undefweak 4984 && ((struct ppc_link_hash_entry *) h)->fake)) 4985 return h; 4986 4987 if (name[0] == '.') 4988 return h; 4989 4990 len = strlen (name); 4991 dot_name = bfd_alloc (abfd, len + 2); 4992 if (dot_name == NULL) 4993 return (struct elf_link_hash_entry *) 0 - 1; 4994 dot_name[0] = '.'; 4995 memcpy (dot_name + 1, name, len + 1); 4996 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); 4997 bfd_release (abfd, dot_name); 4998 return h; 4999} 5000 5001/* This function satisfies all old ABI object references to ".bar" if a 5002 new ABI object defines "bar". Well, at least, undefined dot symbols 5003 are made weak. This stops later archive searches from including an 5004 object if we already have a function descriptor definition. It also 5005 prevents the linker complaining about undefined symbols. 5006 We also check and correct mismatched symbol visibility here. The 5007 most restrictive visibility of the function descriptor and the 5008 function entry symbol is used. */ 5009 5010static bfd_boolean 5011add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) 5012{ 5013 struct ppc_link_hash_table *htab; 5014 struct ppc_link_hash_entry *fdh; 5015 5016 if (eh->elf.root.type == bfd_link_hash_indirect) 5017 return TRUE; 5018 5019 if (eh->elf.root.type == bfd_link_hash_warning) 5020 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; 5021 5022 if (eh->elf.root.root.string[0] != '.') 5023 abort (); 5024 5025 htab = ppc_hash_table (info); 5026 if (htab == NULL) 5027 return FALSE; 5028 5029 fdh = lookup_fdh (eh, htab); 5030 if (fdh == NULL) 5031 { 5032 if (!bfd_link_relocatable (info) 5033 && (eh->elf.root.type == bfd_link_hash_undefined 5034 || eh->elf.root.type == bfd_link_hash_undefweak) 5035 && eh->elf.ref_regular) 5036 { 5037 /* Make an undefweak function descriptor sym, which is enough to 5038 pull in an --as-needed shared lib, but won't cause link 5039 errors. Archives are handled elsewhere. */ 5040 fdh = make_fdh (info, eh); 5041 if (fdh == NULL) 5042 return FALSE; 5043 fdh->elf.ref_regular = 1; 5044 } 5045 } 5046 else 5047 { 5048 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; 5049 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; 5050 if (entry_vis < descr_vis) 5051 fdh->elf.other += entry_vis - descr_vis; 5052 else if (entry_vis > descr_vis) 5053 eh->elf.other += descr_vis - entry_vis; 5054 5055 if ((fdh->elf.root.type == bfd_link_hash_defined 5056 || fdh->elf.root.type == bfd_link_hash_defweak) 5057 && eh->elf.root.type == bfd_link_hash_undefined) 5058 { 5059 eh->elf.root.type = bfd_link_hash_undefweak; 5060 eh->was_undefined = 1; 5061 htab->twiddled_syms = 1; 5062 } 5063 } 5064 5065 return TRUE; 5066} 5067 5068/* Set up opd section info and abiversion for IBFD, and process list 5069 of dot-symbols we made in link_hash_newfunc. */ 5070 5071static bfd_boolean 5072ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info) 5073{ 5074 struct ppc_link_hash_table *htab; 5075 struct ppc_link_hash_entry **p, *eh; 5076 asection *opd = bfd_get_section_by_name (ibfd, ".opd"); 5077 5078 if (opd != NULL && opd->size != 0) 5079 { 5080 if (abiversion (ibfd) == 0) 5081 set_abiversion (ibfd, 1); 5082 else if (abiversion (ibfd) == 2) 5083 { 5084 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI" 5085 " version %d\n"), 5086 ibfd, abiversion (ibfd)); 5087 bfd_set_error (bfd_error_bad_value); 5088 return FALSE; 5089 } 5090 5091 if ((ibfd->flags & DYNAMIC) == 0 5092 && (opd->flags & SEC_RELOC) != 0 5093 && opd->reloc_count != 0 5094 && !bfd_is_abs_section (opd->output_section)) 5095 { 5096 /* Garbage collection needs some extra help with .opd sections. 5097 We don't want to necessarily keep everything referenced by 5098 relocs in .opd, as that would keep all functions. Instead, 5099 if we reference an .opd symbol (a function descriptor), we 5100 want to keep the function code symbol's section. This is 5101 easy for global symbols, but for local syms we need to keep 5102 information about the associated function section. */ 5103 bfd_size_type amt; 5104 asection **opd_sym_map; 5105 5106 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map); 5107 opd_sym_map = bfd_zalloc (ibfd, amt); 5108 if (opd_sym_map == NULL) 5109 return FALSE; 5110 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map; 5111 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal); 5112 ppc64_elf_section_data (opd)->sec_type = sec_opd; 5113 } 5114 } 5115 5116 if (!is_ppc64_elf (info->output_bfd)) 5117 return TRUE; 5118 htab = ppc_hash_table (info); 5119 if (htab == NULL) 5120 return FALSE; 5121 5122 /* For input files without an explicit abiversion in e_flags 5123 we should have flagged any with symbol st_other bits set 5124 as ELFv1 and above flagged those with .opd as ELFv2. 5125 Set the output abiversion if not yet set, and for any input 5126 still ambiguous, take its abiversion from the output. 5127 Differences in ABI are reported later. */ 5128 if (abiversion (info->output_bfd) == 0) 5129 set_abiversion (info->output_bfd, abiversion (ibfd)); 5130 else if (abiversion (ibfd) == 0) 5131 set_abiversion (ibfd, abiversion (info->output_bfd)); 5132 5133 p = &htab->dot_syms; 5134 while ((eh = *p) != NULL) 5135 { 5136 *p = NULL; 5137 if (&eh->elf == htab->elf.hgot) 5138 ; 5139 else if (htab->elf.hgot == NULL 5140 && strcmp (eh->elf.root.root.string, ".TOC.") == 0) 5141 htab->elf.hgot = &eh->elf; 5142 else if (!add_symbol_adjust (eh, info)) 5143 return FALSE; 5144 p = &eh->u.next_dot_sym; 5145 } 5146 5147 /* Clear the list for non-ppc64 input files. */ 5148 p = &htab->dot_syms; 5149 while ((eh = *p) != NULL) 5150 { 5151 *p = NULL; 5152 p = &eh->u.next_dot_sym; 5153 } 5154 5155 /* We need to fix the undefs list for any syms we have twiddled to 5156 undefweak. */ 5157 if (htab->twiddled_syms) 5158 { 5159 bfd_link_repair_undef_list (&htab->elf.root); 5160 htab->twiddled_syms = 0; 5161 } 5162 return TRUE; 5163} 5164 5165/* Undo hash table changes when an --as-needed input file is determined 5166 not to be needed. */ 5167 5168static bfd_boolean 5169ppc64_elf_notice_as_needed (bfd *ibfd, 5170 struct bfd_link_info *info, 5171 enum notice_asneeded_action act) 5172{ 5173 if (act == notice_not_needed) 5174 { 5175 struct ppc_link_hash_table *htab = ppc_hash_table (info); 5176 5177 if (htab == NULL) 5178 return FALSE; 5179 5180 htab->dot_syms = NULL; 5181 } 5182 return _bfd_elf_notice_as_needed (ibfd, info, act); 5183} 5184 5185/* If --just-symbols against a final linked binary, then assume we need 5186 toc adjusting stubs when calling functions defined there. */ 5187 5188static void 5189ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info) 5190{ 5191 if ((sec->flags & SEC_CODE) != 0 5192 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0 5193 && is_ppc64_elf (sec->owner)) 5194 { 5195 if (abiversion (sec->owner) >= 2 5196 || bfd_get_section_by_name (sec->owner, ".opd") != NULL) 5197 sec->has_toc_reloc = 1; 5198 } 5199 _bfd_elf_link_just_syms (sec, info); 5200} 5201 5202static struct plt_entry ** 5203update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, 5204 unsigned long r_symndx, bfd_vma r_addend, int tls_type) 5205{ 5206 struct got_entry **local_got_ents = elf_local_got_ents (abfd); 5207 struct plt_entry **local_plt; 5208 unsigned char *local_got_tls_masks; 5209 5210 if (local_got_ents == NULL) 5211 { 5212 bfd_size_type size = symtab_hdr->sh_info; 5213 5214 size *= (sizeof (*local_got_ents) 5215 + sizeof (*local_plt) 5216 + sizeof (*local_got_tls_masks)); 5217 local_got_ents = bfd_zalloc (abfd, size); 5218 if (local_got_ents == NULL) 5219 return NULL; 5220 elf_local_got_ents (abfd) = local_got_ents; 5221 } 5222 5223 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0) 5224 { 5225 struct got_entry *ent; 5226 5227 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) 5228 if (ent->addend == r_addend 5229 && ent->owner == abfd 5230 && ent->tls_type == tls_type) 5231 break; 5232 if (ent == NULL) 5233 { 5234 bfd_size_type amt = sizeof (*ent); 5235 ent = bfd_alloc (abfd, amt); 5236 if (ent == NULL) 5237 return FALSE; 5238 ent->next = local_got_ents[r_symndx]; 5239 ent->addend = r_addend; 5240 ent->owner = abfd; 5241 ent->tls_type = tls_type; 5242 ent->is_indirect = FALSE; 5243 ent->got.refcount = 0; 5244 local_got_ents[r_symndx] = ent; 5245 } 5246 ent->got.refcount += 1; 5247 } 5248 5249 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info); 5250 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); 5251 local_got_tls_masks[r_symndx] |= tls_type; 5252 5253 return local_plt + r_symndx; 5254} 5255 5256static bfd_boolean 5257update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend) 5258{ 5259 struct plt_entry *ent; 5260 5261 for (ent = *plist; ent != NULL; ent = ent->next) 5262 if (ent->addend == addend) 5263 break; 5264 if (ent == NULL) 5265 { 5266 bfd_size_type amt = sizeof (*ent); 5267 ent = bfd_alloc (abfd, amt); 5268 if (ent == NULL) 5269 return FALSE; 5270 ent->next = *plist; 5271 ent->addend = addend; 5272 ent->plt.refcount = 0; 5273 *plist = ent; 5274 } 5275 ent->plt.refcount += 1; 5276 return TRUE; 5277} 5278 5279static bfd_boolean 5280is_branch_reloc (enum elf_ppc64_reloc_type r_type) 5281{ 5282 return (r_type == R_PPC64_REL24 5283 || r_type == R_PPC64_REL14 5284 || r_type == R_PPC64_REL14_BRTAKEN 5285 || r_type == R_PPC64_REL14_BRNTAKEN 5286 || r_type == R_PPC64_ADDR24 5287 || r_type == R_PPC64_ADDR14 5288 || r_type == R_PPC64_ADDR14_BRTAKEN 5289 || r_type == R_PPC64_ADDR14_BRNTAKEN); 5290} 5291 5292/* Look through the relocs for a section during the first phase, and 5293 calculate needed space in the global offset table, procedure 5294 linkage table, and dynamic reloc sections. */ 5295 5296static bfd_boolean 5297ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 5298 asection *sec, const Elf_Internal_Rela *relocs) 5299{ 5300 struct ppc_link_hash_table *htab; 5301 Elf_Internal_Shdr *symtab_hdr; 5302 struct elf_link_hash_entry **sym_hashes; 5303 const Elf_Internal_Rela *rel; 5304 const Elf_Internal_Rela *rel_end; 5305 asection *sreloc; 5306 asection **opd_sym_map; 5307 struct elf_link_hash_entry *tga, *dottga; 5308 5309 if (bfd_link_relocatable (info)) 5310 return TRUE; 5311 5312 /* Don't do anything special with non-loaded, non-alloced sections. 5313 In particular, any relocs in such sections should not affect GOT 5314 and PLT reference counting (ie. we don't allow them to create GOT 5315 or PLT entries), there's no possibility or desire to optimize TLS 5316 relocs, and there's not much point in propagating relocs to shared 5317 libs that the dynamic linker won't relocate. */ 5318 if ((sec->flags & SEC_ALLOC) == 0) 5319 return TRUE; 5320 5321 BFD_ASSERT (is_ppc64_elf (abfd)); 5322 5323 htab = ppc_hash_table (info); 5324 if (htab == NULL) 5325 return FALSE; 5326 5327 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5328 FALSE, FALSE, TRUE); 5329 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", 5330 FALSE, FALSE, TRUE); 5331 symtab_hdr = &elf_symtab_hdr (abfd); 5332 sym_hashes = elf_sym_hashes (abfd); 5333 sreloc = NULL; 5334 opd_sym_map = NULL; 5335 if (ppc64_elf_section_data (sec) != NULL 5336 && ppc64_elf_section_data (sec)->sec_type == sec_opd) 5337 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec; 5338 5339 rel_end = relocs + sec->reloc_count; 5340 for (rel = relocs; rel < rel_end; rel++) 5341 { 5342 unsigned long r_symndx; 5343 struct elf_link_hash_entry *h; 5344 enum elf_ppc64_reloc_type r_type; 5345 int tls_type; 5346 struct _ppc64_elf_section_data *ppc64_sec; 5347 struct plt_entry **ifunc, **plt_list; 5348 5349 r_symndx = ELF64_R_SYM (rel->r_info); 5350 if (r_symndx < symtab_hdr->sh_info) 5351 h = NULL; 5352 else 5353 { 5354 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5355 h = elf_follow_link (h); 5356 5357 /* PR15323, ref flags aren't set for references in the same 5358 object. */ 5359 h->root.non_ir_ref = 1; 5360 5361 if (h == htab->elf.hgot) 5362 sec->has_toc_reloc = 1; 5363 } 5364 5365 tls_type = 0; 5366 ifunc = NULL; 5367 if (h != NULL) 5368 { 5369 if (h->type == STT_GNU_IFUNC) 5370 { 5371 h->needs_plt = 1; 5372 ifunc = &h->plt.plist; 5373 } 5374 } 5375 else 5376 { 5377 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 5378 abfd, r_symndx); 5379 if (isym == NULL) 5380 return FALSE; 5381 5382 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 5383 { 5384 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 5385 rel->r_addend, PLT_IFUNC); 5386 if (ifunc == NULL) 5387 return FALSE; 5388 } 5389 } 5390 5391 r_type = ELF64_R_TYPE (rel->r_info); 5392 switch (r_type) 5393 { 5394 case R_PPC64_TLSGD: 5395 case R_PPC64_TLSLD: 5396 /* These special tls relocs tie a call to __tls_get_addr with 5397 its parameter symbol. */ 5398 break; 5399 5400 case R_PPC64_GOT_TLSLD16: 5401 case R_PPC64_GOT_TLSLD16_LO: 5402 case R_PPC64_GOT_TLSLD16_HI: 5403 case R_PPC64_GOT_TLSLD16_HA: 5404 tls_type = TLS_TLS | TLS_LD; 5405 goto dogottls; 5406 5407 case R_PPC64_GOT_TLSGD16: 5408 case R_PPC64_GOT_TLSGD16_LO: 5409 case R_PPC64_GOT_TLSGD16_HI: 5410 case R_PPC64_GOT_TLSGD16_HA: 5411 tls_type = TLS_TLS | TLS_GD; 5412 goto dogottls; 5413 5414 case R_PPC64_GOT_TPREL16_DS: 5415 case R_PPC64_GOT_TPREL16_LO_DS: 5416 case R_PPC64_GOT_TPREL16_HI: 5417 case R_PPC64_GOT_TPREL16_HA: 5418 if (bfd_link_pic (info)) 5419 info->flags |= DF_STATIC_TLS; 5420 tls_type = TLS_TLS | TLS_TPREL; 5421 goto dogottls; 5422 5423 case R_PPC64_GOT_DTPREL16_DS: 5424 case R_PPC64_GOT_DTPREL16_LO_DS: 5425 case R_PPC64_GOT_DTPREL16_HI: 5426 case R_PPC64_GOT_DTPREL16_HA: 5427 tls_type = TLS_TLS | TLS_DTPREL; 5428 dogottls: 5429 sec->has_tls_reloc = 1; 5430 /* Fall thru */ 5431 5432 case R_PPC64_GOT16: 5433 case R_PPC64_GOT16_DS: 5434 case R_PPC64_GOT16_HA: 5435 case R_PPC64_GOT16_HI: 5436 case R_PPC64_GOT16_LO: 5437 case R_PPC64_GOT16_LO_DS: 5438 /* This symbol requires a global offset table entry. */ 5439 sec->has_toc_reloc = 1; 5440 if (r_type == R_PPC64_GOT_TLSLD16 5441 || r_type == R_PPC64_GOT_TLSGD16 5442 || r_type == R_PPC64_GOT_TPREL16_DS 5443 || r_type == R_PPC64_GOT_DTPREL16_DS 5444 || r_type == R_PPC64_GOT16 5445 || r_type == R_PPC64_GOT16_DS) 5446 { 5447 htab->do_multi_toc = 1; 5448 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; 5449 } 5450 5451 if (ppc64_elf_tdata (abfd)->got == NULL 5452 && !create_got_section (abfd, info)) 5453 return FALSE; 5454 5455 if (h != NULL) 5456 { 5457 struct ppc_link_hash_entry *eh; 5458 struct got_entry *ent; 5459 5460 eh = (struct ppc_link_hash_entry *) h; 5461 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) 5462 if (ent->addend == rel->r_addend 5463 && ent->owner == abfd 5464 && ent->tls_type == tls_type) 5465 break; 5466 if (ent == NULL) 5467 { 5468 bfd_size_type amt = sizeof (*ent); 5469 ent = bfd_alloc (abfd, amt); 5470 if (ent == NULL) 5471 return FALSE; 5472 ent->next = eh->elf.got.glist; 5473 ent->addend = rel->r_addend; 5474 ent->owner = abfd; 5475 ent->tls_type = tls_type; 5476 ent->is_indirect = FALSE; 5477 ent->got.refcount = 0; 5478 eh->elf.got.glist = ent; 5479 } 5480 ent->got.refcount += 1; 5481 eh->tls_mask |= tls_type; 5482 } 5483 else 5484 /* This is a global offset table entry for a local symbol. */ 5485 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, 5486 rel->r_addend, tls_type)) 5487 return FALSE; 5488 5489 /* We may also need a plt entry if the symbol turns out to be 5490 an ifunc. */ 5491 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1) 5492 { 5493 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) 5494 return FALSE; 5495 } 5496 break; 5497 5498 case R_PPC64_PLT16_HA: 5499 case R_PPC64_PLT16_HI: 5500 case R_PPC64_PLT16_LO: 5501 case R_PPC64_PLT32: 5502 case R_PPC64_PLT64: 5503 /* This symbol requires a procedure linkage table entry. */ 5504 plt_list = ifunc; 5505 if (h != NULL) 5506 { 5507 h->needs_plt = 1; 5508 if (h->root.root.string[0] == '.' 5509 && h->root.root.string[1] != '\0') 5510 ((struct ppc_link_hash_entry *) h)->is_func = 1; 5511 plt_list = &h->plt.plist; 5512 } 5513 if (plt_list == NULL) 5514 { 5515 /* It does not make sense to have a procedure linkage 5516 table entry for a non-ifunc local symbol. */ 5517 info->callbacks->einfo 5518 (_("%P: %H: %s reloc against local symbol\n"), 5519 abfd, sec, rel->r_offset, 5520 ppc64_elf_howto_table[r_type]->name); 5521 bfd_set_error (bfd_error_bad_value); 5522 return FALSE; 5523 } 5524 if (!update_plt_info (abfd, plt_list, rel->r_addend)) 5525 return FALSE; 5526 break; 5527 5528 /* The following relocations don't need to propagate the 5529 relocation if linking a shared object since they are 5530 section relative. */ 5531 case R_PPC64_SECTOFF: 5532 case R_PPC64_SECTOFF_LO: 5533 case R_PPC64_SECTOFF_HI: 5534 case R_PPC64_SECTOFF_HA: 5535 case R_PPC64_SECTOFF_DS: 5536 case R_PPC64_SECTOFF_LO_DS: 5537 case R_PPC64_DTPREL16: 5538 case R_PPC64_DTPREL16_LO: 5539 case R_PPC64_DTPREL16_HI: 5540 case R_PPC64_DTPREL16_HA: 5541 case R_PPC64_DTPREL16_DS: 5542 case R_PPC64_DTPREL16_LO_DS: 5543 case R_PPC64_DTPREL16_HIGH: 5544 case R_PPC64_DTPREL16_HIGHA: 5545 case R_PPC64_DTPREL16_HIGHER: 5546 case R_PPC64_DTPREL16_HIGHERA: 5547 case R_PPC64_DTPREL16_HIGHEST: 5548 case R_PPC64_DTPREL16_HIGHESTA: 5549 break; 5550 5551 /* Nor do these. */ 5552 case R_PPC64_REL16: 5553 case R_PPC64_REL16_LO: 5554 case R_PPC64_REL16_HI: 5555 case R_PPC64_REL16_HA: 5556 case R_PPC64_REL16DX_HA: 5557 break; 5558 5559 /* Not supported as a dynamic relocation. */ 5560 case R_PPC64_ADDR64_LOCAL: 5561 if (bfd_link_pic (info)) 5562 { 5563 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 5564 ppc_howto_init (); 5565 info->callbacks->einfo (_("%P: %H: %s reloc unsupported " 5566 "in shared libraries and PIEs.\n"), 5567 abfd, sec, rel->r_offset, 5568 ppc64_elf_howto_table[r_type]->name); 5569 bfd_set_error (bfd_error_bad_value); 5570 return FALSE; 5571 } 5572 break; 5573 5574 case R_PPC64_TOC16: 5575 case R_PPC64_TOC16_DS: 5576 htab->do_multi_toc = 1; 5577 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; 5578 case R_PPC64_TOC16_LO: 5579 case R_PPC64_TOC16_HI: 5580 case R_PPC64_TOC16_HA: 5581 case R_PPC64_TOC16_LO_DS: 5582 sec->has_toc_reloc = 1; 5583 break; 5584 5585 /* Marker reloc. */ 5586 case R_PPC64_ENTRY: 5587 break; 5588 5589 /* This relocation describes the C++ object vtable hierarchy. 5590 Reconstruct it for later use during GC. */ 5591 case R_PPC64_GNU_VTINHERIT: 5592 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 5593 return FALSE; 5594 break; 5595 5596 /* This relocation describes which C++ vtable entries are actually 5597 used. Record for later use during GC. */ 5598 case R_PPC64_GNU_VTENTRY: 5599 BFD_ASSERT (h != NULL); 5600 if (h != NULL 5601 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 5602 return FALSE; 5603 break; 5604 5605 case R_PPC64_REL14: 5606 case R_PPC64_REL14_BRTAKEN: 5607 case R_PPC64_REL14_BRNTAKEN: 5608 { 5609 asection *dest = NULL; 5610 5611 /* Heuristic: If jumping outside our section, chances are 5612 we are going to need a stub. */ 5613 if (h != NULL) 5614 { 5615 /* If the sym is weak it may be overridden later, so 5616 don't assume we know where a weak sym lives. */ 5617 if (h->root.type == bfd_link_hash_defined) 5618 dest = h->root.u.def.section; 5619 } 5620 else 5621 { 5622 Elf_Internal_Sym *isym; 5623 5624 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 5625 abfd, r_symndx); 5626 if (isym == NULL) 5627 return FALSE; 5628 5629 dest = bfd_section_from_elf_index (abfd, isym->st_shndx); 5630 } 5631 5632 if (dest != sec) 5633 ppc64_elf_section_data (sec)->has_14bit_branch = 1; 5634 } 5635 /* Fall through. */ 5636 5637 case R_PPC64_REL24: 5638 plt_list = ifunc; 5639 if (h != NULL) 5640 { 5641 h->needs_plt = 1; 5642 if (h->root.root.string[0] == '.' 5643 && h->root.root.string[1] != '\0') 5644 ((struct ppc_link_hash_entry *) h)->is_func = 1; 5645 5646 if (h == tga || h == dottga) 5647 { 5648 sec->has_tls_reloc = 1; 5649 if (rel != relocs 5650 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD 5651 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD)) 5652 /* We have a new-style __tls_get_addr call with 5653 a marker reloc. */ 5654 ; 5655 else 5656 /* Mark this section as having an old-style call. */ 5657 sec->has_tls_get_addr_call = 1; 5658 } 5659 plt_list = &h->plt.plist; 5660 } 5661 5662 /* We may need a .plt entry if the function this reloc 5663 refers to is in a shared lib. */ 5664 if (plt_list 5665 && !update_plt_info (abfd, plt_list, rel->r_addend)) 5666 return FALSE; 5667 break; 5668 5669 case R_PPC64_ADDR14: 5670 case R_PPC64_ADDR14_BRNTAKEN: 5671 case R_PPC64_ADDR14_BRTAKEN: 5672 case R_PPC64_ADDR24: 5673 goto dodyn; 5674 5675 case R_PPC64_TPREL64: 5676 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; 5677 if (bfd_link_pic (info)) 5678 info->flags |= DF_STATIC_TLS; 5679 goto dotlstoc; 5680 5681 case R_PPC64_DTPMOD64: 5682 if (rel + 1 < rel_end 5683 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) 5684 && rel[1].r_offset == rel->r_offset + 8) 5685 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; 5686 else 5687 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; 5688 goto dotlstoc; 5689 5690 case R_PPC64_DTPREL64: 5691 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; 5692 if (rel != relocs 5693 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) 5694 && rel[-1].r_offset == rel->r_offset - 8) 5695 /* This is the second reloc of a dtpmod, dtprel pair. 5696 Don't mark with TLS_DTPREL. */ 5697 goto dodyn; 5698 5699 dotlstoc: 5700 sec->has_tls_reloc = 1; 5701 if (h != NULL) 5702 { 5703 struct ppc_link_hash_entry *eh; 5704 eh = (struct ppc_link_hash_entry *) h; 5705 eh->tls_mask |= tls_type; 5706 } 5707 else 5708 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, 5709 rel->r_addend, tls_type)) 5710 return FALSE; 5711 5712 ppc64_sec = ppc64_elf_section_data (sec); 5713 if (ppc64_sec->sec_type != sec_toc) 5714 { 5715 bfd_size_type amt; 5716 5717 /* One extra to simplify get_tls_mask. */ 5718 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned); 5719 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt); 5720 if (ppc64_sec->u.toc.symndx == NULL) 5721 return FALSE; 5722 amt = sec->size * sizeof (bfd_vma) / 8; 5723 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt); 5724 if (ppc64_sec->u.toc.add == NULL) 5725 return FALSE; 5726 BFD_ASSERT (ppc64_sec->sec_type == sec_normal); 5727 ppc64_sec->sec_type = sec_toc; 5728 } 5729 BFD_ASSERT (rel->r_offset % 8 == 0); 5730 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx; 5731 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend; 5732 5733 /* Mark the second slot of a GD or LD entry. 5734 -1 to indicate GD and -2 to indicate LD. */ 5735 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) 5736 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1; 5737 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) 5738 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2; 5739 goto dodyn; 5740 5741 case R_PPC64_TPREL16: 5742 case R_PPC64_TPREL16_LO: 5743 case R_PPC64_TPREL16_HI: 5744 case R_PPC64_TPREL16_HA: 5745 case R_PPC64_TPREL16_DS: 5746 case R_PPC64_TPREL16_LO_DS: 5747 case R_PPC64_TPREL16_HIGH: 5748 case R_PPC64_TPREL16_HIGHA: 5749 case R_PPC64_TPREL16_HIGHER: 5750 case R_PPC64_TPREL16_HIGHERA: 5751 case R_PPC64_TPREL16_HIGHEST: 5752 case R_PPC64_TPREL16_HIGHESTA: 5753 if (bfd_link_pic (info)) 5754 { 5755 info->flags |= DF_STATIC_TLS; 5756 goto dodyn; 5757 } 5758 break; 5759 5760 case R_PPC64_ADDR64: 5761 if (opd_sym_map != NULL 5762 && rel + 1 < rel_end 5763 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) 5764 { 5765 if (h != NULL) 5766 { 5767 if (h->root.root.string[0] == '.' 5768 && h->root.root.string[1] != 0 5769 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab)) 5770 ; 5771 else 5772 ((struct ppc_link_hash_entry *) h)->is_func = 1; 5773 } 5774 else 5775 { 5776 asection *s; 5777 Elf_Internal_Sym *isym; 5778 5779 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 5780 abfd, r_symndx); 5781 if (isym == NULL) 5782 return FALSE; 5783 5784 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 5785 if (s != NULL && s != sec) 5786 opd_sym_map[OPD_NDX (rel->r_offset)] = s; 5787 } 5788 } 5789 /* Fall through. */ 5790 5791 case R_PPC64_ADDR16: 5792 case R_PPC64_ADDR16_DS: 5793 case R_PPC64_ADDR16_HA: 5794 case R_PPC64_ADDR16_HI: 5795 case R_PPC64_ADDR16_HIGH: 5796 case R_PPC64_ADDR16_HIGHA: 5797 case R_PPC64_ADDR16_HIGHER: 5798 case R_PPC64_ADDR16_HIGHERA: 5799 case R_PPC64_ADDR16_HIGHEST: 5800 case R_PPC64_ADDR16_HIGHESTA: 5801 case R_PPC64_ADDR16_LO: 5802 case R_PPC64_ADDR16_LO_DS: 5803 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1 5804 && rel->r_addend == 0) 5805 { 5806 /* We may need a .plt entry if this reloc refers to a 5807 function in a shared lib. */ 5808 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend)) 5809 return FALSE; 5810 h->pointer_equality_needed = 1; 5811 } 5812 /* Fall through. */ 5813 5814 case R_PPC64_REL30: 5815 case R_PPC64_REL32: 5816 case R_PPC64_REL64: 5817 case R_PPC64_ADDR32: 5818 case R_PPC64_UADDR16: 5819 case R_PPC64_UADDR32: 5820 case R_PPC64_UADDR64: 5821 case R_PPC64_TOC: 5822 if (h != NULL && !bfd_link_pic (info)) 5823 /* We may need a copy reloc. */ 5824 h->non_got_ref = 1; 5825 5826 /* Don't propagate .opd relocs. */ 5827 if (NO_OPD_RELOCS && opd_sym_map != NULL) 5828 break; 5829 5830 /* If we are creating a shared library, and this is a reloc 5831 against a global symbol, or a non PC relative reloc 5832 against a local symbol, then we need to copy the reloc 5833 into the shared library. However, if we are linking with 5834 -Bsymbolic, we do not need to copy a reloc against a 5835 global symbol which is defined in an object we are 5836 including in the link (i.e., DEF_REGULAR is set). At 5837 this point we have not seen all the input files, so it is 5838 possible that DEF_REGULAR is not set now but will be set 5839 later (it is never cleared). In case of a weak definition, 5840 DEF_REGULAR may be cleared later by a strong definition in 5841 a shared library. We account for that possibility below by 5842 storing information in the dyn_relocs field of the hash 5843 table entry. A similar situation occurs when creating 5844 shared libraries and symbol visibility changes render the 5845 symbol local. 5846 5847 If on the other hand, we are creating an executable, we 5848 may need to keep relocations for symbols satisfied by a 5849 dynamic library if we manage to avoid copy relocs for the 5850 symbol. */ 5851 dodyn: 5852 if ((bfd_link_pic (info) 5853 && (must_be_dyn_reloc (info, r_type) 5854 || (h != NULL 5855 && (!SYMBOLIC_BIND (info, h) 5856 || h->root.type == bfd_link_hash_defweak 5857 || !h->def_regular)))) 5858 || (ELIMINATE_COPY_RELOCS 5859 && !bfd_link_pic (info) 5860 && h != NULL 5861 && (h->root.type == bfd_link_hash_defweak 5862 || !h->def_regular)) 5863 || (!bfd_link_pic (info) 5864 && ifunc != NULL)) 5865 { 5866 /* We must copy these reloc types into the output file. 5867 Create a reloc section in dynobj and make room for 5868 this reloc. */ 5869 if (sreloc == NULL) 5870 { 5871 sreloc = _bfd_elf_make_dynamic_reloc_section 5872 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); 5873 5874 if (sreloc == NULL) 5875 return FALSE; 5876 } 5877 5878 /* If this is a global symbol, we count the number of 5879 relocations we need for this symbol. */ 5880 if (h != NULL) 5881 { 5882 struct elf_dyn_relocs *p; 5883 struct elf_dyn_relocs **head; 5884 5885 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; 5886 p = *head; 5887 if (p == NULL || p->sec != sec) 5888 { 5889 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 5890 if (p == NULL) 5891 return FALSE; 5892 p->next = *head; 5893 *head = p; 5894 p->sec = sec; 5895 p->count = 0; 5896 p->pc_count = 0; 5897 } 5898 p->count += 1; 5899 if (!must_be_dyn_reloc (info, r_type)) 5900 p->pc_count += 1; 5901 } 5902 else 5903 { 5904 /* Track dynamic relocs needed for local syms too. 5905 We really need local syms available to do this 5906 easily. Oh well. */ 5907 struct ppc_dyn_relocs *p; 5908 struct ppc_dyn_relocs **head; 5909 bfd_boolean is_ifunc; 5910 asection *s; 5911 void *vpp; 5912 Elf_Internal_Sym *isym; 5913 5914 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 5915 abfd, r_symndx); 5916 if (isym == NULL) 5917 return FALSE; 5918 5919 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 5920 if (s == NULL) 5921 s = sec; 5922 5923 vpp = &elf_section_data (s)->local_dynrel; 5924 head = (struct ppc_dyn_relocs **) vpp; 5925 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; 5926 p = *head; 5927 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) 5928 p = p->next; 5929 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) 5930 { 5931 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 5932 if (p == NULL) 5933 return FALSE; 5934 p->next = *head; 5935 *head = p; 5936 p->sec = sec; 5937 p->ifunc = is_ifunc; 5938 p->count = 0; 5939 } 5940 p->count += 1; 5941 } 5942 } 5943 break; 5944 5945 default: 5946 break; 5947 } 5948 } 5949 5950 return TRUE; 5951} 5952 5953/* Merge backend specific data from an object file to the output 5954 object file when linking. */ 5955 5956static bfd_boolean 5957ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 5958{ 5959 unsigned long iflags, oflags; 5960 5961 if ((ibfd->flags & BFD_LINKER_CREATED) != 0) 5962 return TRUE; 5963 5964 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd)) 5965 return TRUE; 5966 5967 if (!_bfd_generic_verify_endian_match (ibfd, obfd)) 5968 return FALSE; 5969 5970 iflags = elf_elfheader (ibfd)->e_flags; 5971 oflags = elf_elfheader (obfd)->e_flags; 5972 5973 if (iflags & ~EF_PPC64_ABI) 5974 { 5975 (*_bfd_error_handler) 5976 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags); 5977 bfd_set_error (bfd_error_bad_value); 5978 return FALSE; 5979 } 5980 else if (iflags != oflags && iflags != 0) 5981 { 5982 (*_bfd_error_handler) 5983 (_("%B: ABI version %ld is not compatible with ABI version %ld output"), 5984 ibfd, iflags, oflags); 5985 bfd_set_error (bfd_error_bad_value); 5986 return FALSE; 5987 } 5988 5989 /* Merge Tag_compatibility attributes and any common GNU ones. */ 5990 _bfd_elf_merge_object_attributes (ibfd, obfd); 5991 5992 return TRUE; 5993} 5994 5995static bfd_boolean 5996ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr) 5997{ 5998 /* Print normal ELF private data. */ 5999 _bfd_elf_print_private_bfd_data (abfd, ptr); 6000 6001 if (elf_elfheader (abfd)->e_flags != 0) 6002 { 6003 FILE *file = ptr; 6004 6005 /* xgettext:c-format */ 6006 fprintf (file, _("private flags = 0x%lx:"), 6007 elf_elfheader (abfd)->e_flags); 6008 6009 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0) 6010 fprintf (file, _(" [abiv%ld]"), 6011 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI); 6012 fputc ('\n', file); 6013 } 6014 6015 return TRUE; 6016} 6017 6018/* OFFSET in OPD_SEC specifies a function descriptor. Return the address 6019 of the code entry point, and its section, which must be in the same 6020 object as OPD_SEC. Returns (bfd_vma) -1 on error. */ 6021 6022static bfd_vma 6023opd_entry_value (asection *opd_sec, 6024 bfd_vma offset, 6025 asection **code_sec, 6026 bfd_vma *code_off, 6027 bfd_boolean in_code_sec) 6028{ 6029 bfd *opd_bfd = opd_sec->owner; 6030 Elf_Internal_Rela *relocs; 6031 Elf_Internal_Rela *lo, *hi, *look; 6032 bfd_vma val; 6033 6034 /* No relocs implies we are linking a --just-symbols object, or looking 6035 at a final linked executable with addr2line or somesuch. */ 6036 if (opd_sec->reloc_count == 0) 6037 { 6038 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents; 6039 6040 if (contents == NULL) 6041 { 6042 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents)) 6043 return (bfd_vma) -1; 6044 ppc64_elf_tdata (opd_bfd)->opd.contents = contents; 6045 } 6046 6047 /* PR 17512: file: 64b9dfbb. */ 6048 if (offset + 7 >= opd_sec->size || offset + 7 < offset) 6049 return (bfd_vma) -1; 6050 6051 val = bfd_get_64 (opd_bfd, contents + offset); 6052 if (code_sec != NULL) 6053 { 6054 asection *sec, *likely = NULL; 6055 6056 if (in_code_sec) 6057 { 6058 sec = *code_sec; 6059 if (sec->vma <= val 6060 && val < sec->vma + sec->size) 6061 likely = sec; 6062 else 6063 val = -1; 6064 } 6065 else 6066 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) 6067 if (sec->vma <= val 6068 && (sec->flags & SEC_LOAD) != 0 6069 && (sec->flags & SEC_ALLOC) != 0) 6070 likely = sec; 6071 if (likely != NULL) 6072 { 6073 *code_sec = likely; 6074 if (code_off != NULL) 6075 *code_off = val - likely->vma; 6076 } 6077 } 6078 return val; 6079 } 6080 6081 BFD_ASSERT (is_ppc64_elf (opd_bfd)); 6082 6083 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs; 6084 if (relocs == NULL) 6085 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE); 6086 /* PR 17512: file: df8e1fd6. */ 6087 if (relocs == NULL) 6088 return (bfd_vma) -1; 6089 6090 /* Go find the opd reloc at the sym address. */ 6091 lo = relocs; 6092 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ 6093 val = (bfd_vma) -1; 6094 while (lo < hi) 6095 { 6096 look = lo + (hi - lo) / 2; 6097 if (look->r_offset < offset) 6098 lo = look + 1; 6099 else if (look->r_offset > offset) 6100 hi = look; 6101 else 6102 { 6103 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd); 6104 6105 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 6106 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) 6107 { 6108 unsigned long symndx = ELF64_R_SYM (look->r_info); 6109 asection *sec = NULL; 6110 6111 if (symndx >= symtab_hdr->sh_info 6112 && elf_sym_hashes (opd_bfd) != NULL) 6113 { 6114 struct elf_link_hash_entry **sym_hashes; 6115 struct elf_link_hash_entry *rh; 6116 6117 sym_hashes = elf_sym_hashes (opd_bfd); 6118 rh = sym_hashes[symndx - symtab_hdr->sh_info]; 6119 if (rh != NULL) 6120 { 6121 rh = elf_follow_link (rh); 6122 if (rh->root.type != bfd_link_hash_defined 6123 && rh->root.type != bfd_link_hash_defweak) 6124 break; 6125 if (rh->root.u.def.section->owner == opd_bfd) 6126 { 6127 val = rh->root.u.def.value; 6128 sec = rh->root.u.def.section; 6129 } 6130 } 6131 } 6132 6133 if (sec == NULL) 6134 { 6135 Elf_Internal_Sym *sym; 6136 6137 if (symndx < symtab_hdr->sh_info) 6138 { 6139 sym = (Elf_Internal_Sym *) symtab_hdr->contents; 6140 if (sym == NULL) 6141 { 6142 size_t symcnt = symtab_hdr->sh_info; 6143 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 6144 symcnt, 0, 6145 NULL, NULL, NULL); 6146 if (sym == NULL) 6147 break; 6148 symtab_hdr->contents = (bfd_byte *) sym; 6149 } 6150 sym += symndx; 6151 } 6152 else 6153 { 6154 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 6155 1, symndx, 6156 NULL, NULL, NULL); 6157 if (sym == NULL) 6158 break; 6159 } 6160 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); 6161 if (sec == NULL) 6162 break; 6163 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); 6164 val = sym->st_value; 6165 } 6166 6167 val += look->r_addend; 6168 if (code_off != NULL) 6169 *code_off = val; 6170 if (code_sec != NULL) 6171 { 6172 if (in_code_sec && *code_sec != sec) 6173 return -1; 6174 else 6175 *code_sec = sec; 6176 } 6177 if (sec->output_section != NULL) 6178 val += sec->output_section->vma + sec->output_offset; 6179 } 6180 break; 6181 } 6182 } 6183 6184 return val; 6185} 6186 6187/* If the ELF symbol SYM might be a function in SEC, return the 6188 function size and set *CODE_OFF to the function's entry point, 6189 otherwise return zero. */ 6190 6191static bfd_size_type 6192ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec, 6193 bfd_vma *code_off) 6194{ 6195 bfd_size_type size; 6196 6197 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT 6198 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0) 6199 return 0; 6200 6201 size = 0; 6202 if (!(sym->flags & BSF_SYNTHETIC)) 6203 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size; 6204 6205 if (strcmp (sym->section->name, ".opd") == 0) 6206 { 6207 struct _opd_sec_data *opd = get_opd_info (sym->section); 6208 bfd_vma symval = sym->value; 6209 6210 if (opd != NULL 6211 && opd->adjust != NULL 6212 && elf_section_data (sym->section)->relocs != NULL) 6213 { 6214 /* opd_entry_value will use cached relocs that have been 6215 adjusted, but with raw symbols. That means both local 6216 and global symbols need adjusting. */ 6217 long adjust = opd->adjust[OPD_NDX (symval)]; 6218 if (adjust == -1) 6219 return 0; 6220 symval += adjust; 6221 } 6222 6223 if (opd_entry_value (sym->section, symval, 6224 &sec, code_off, TRUE) == (bfd_vma) -1) 6225 return 0; 6226 /* An old ABI binary with dot-syms has a size of 24 on the .opd 6227 symbol. This size has nothing to do with the code size of the 6228 function, which is what we're supposed to return, but the 6229 code size isn't available without looking up the dot-sym. 6230 However, doing that would be a waste of time particularly 6231 since elf_find_function will look at the dot-sym anyway. 6232 Now, elf_find_function will keep the largest size of any 6233 function sym found at the code address of interest, so return 6234 1 here to avoid it incorrectly caching a larger function size 6235 for a small function. This does mean we return the wrong 6236 size for a new-ABI function of size 24, but all that does is 6237 disable caching for such functions. */ 6238 if (size == 24) 6239 size = 1; 6240 } 6241 else 6242 { 6243 if (sym->section != sec) 6244 return 0; 6245 *code_off = sym->value; 6246 } 6247 if (size == 0) 6248 size = 1; 6249 return size; 6250} 6251 6252/* Return true if symbol is defined in a regular object file. */ 6253 6254static bfd_boolean 6255is_static_defined (struct elf_link_hash_entry *h) 6256{ 6257 return ((h->root.type == bfd_link_hash_defined 6258 || h->root.type == bfd_link_hash_defweak) 6259 && h->root.u.def.section != NULL 6260 && h->root.u.def.section->output_section != NULL); 6261} 6262 6263/* If FDH is a function descriptor symbol, return the associated code 6264 entry symbol if it is defined. Return NULL otherwise. */ 6265 6266static struct ppc_link_hash_entry * 6267defined_code_entry (struct ppc_link_hash_entry *fdh) 6268{ 6269 if (fdh->is_func_descriptor) 6270 { 6271 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh); 6272 if (fh->elf.root.type == bfd_link_hash_defined 6273 || fh->elf.root.type == bfd_link_hash_defweak) 6274 return fh; 6275 } 6276 return NULL; 6277} 6278 6279/* If FH is a function code entry symbol, return the associated 6280 function descriptor symbol if it is defined. Return NULL otherwise. */ 6281 6282static struct ppc_link_hash_entry * 6283defined_func_desc (struct ppc_link_hash_entry *fh) 6284{ 6285 if (fh->oh != NULL 6286 && fh->oh->is_func_descriptor) 6287 { 6288 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh); 6289 if (fdh->elf.root.type == bfd_link_hash_defined 6290 || fdh->elf.root.type == bfd_link_hash_defweak) 6291 return fdh; 6292 } 6293 return NULL; 6294} 6295 6296/* Mark all our entry sym sections, both opd and code section. */ 6297 6298static void 6299ppc64_elf_gc_keep (struct bfd_link_info *info) 6300{ 6301 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6302 struct bfd_sym_chain *sym; 6303 6304 if (htab == NULL) 6305 return; 6306 6307 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) 6308 { 6309 struct ppc_link_hash_entry *eh, *fh; 6310 asection *sec; 6311 6312 eh = (struct ppc_link_hash_entry *) 6313 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE); 6314 if (eh == NULL) 6315 continue; 6316 if (eh->elf.root.type != bfd_link_hash_defined 6317 && eh->elf.root.type != bfd_link_hash_defweak) 6318 continue; 6319 6320 fh = defined_code_entry (eh); 6321 if (fh != NULL) 6322 { 6323 sec = fh->elf.root.u.def.section; 6324 sec->flags |= SEC_KEEP; 6325 } 6326 else if (get_opd_info (eh->elf.root.u.def.section) != NULL 6327 && opd_entry_value (eh->elf.root.u.def.section, 6328 eh->elf.root.u.def.value, 6329 &sec, NULL, FALSE) != (bfd_vma) -1) 6330 sec->flags |= SEC_KEEP; 6331 6332 sec = eh->elf.root.u.def.section; 6333 sec->flags |= SEC_KEEP; 6334 } 6335} 6336 6337/* Mark sections containing dynamically referenced symbols. When 6338 building shared libraries, we must assume that any visible symbol is 6339 referenced. */ 6340 6341static bfd_boolean 6342ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) 6343{ 6344 struct bfd_link_info *info = (struct bfd_link_info *) inf; 6345 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; 6346 struct ppc_link_hash_entry *fdh; 6347 struct bfd_elf_dynamic_list *d = info->dynamic_list; 6348 6349 /* Dynamic linking info is on the func descriptor sym. */ 6350 fdh = defined_func_desc (eh); 6351 if (fdh != NULL) 6352 eh = fdh; 6353 6354 if ((eh->elf.root.type == bfd_link_hash_defined 6355 || eh->elf.root.type == bfd_link_hash_defweak) 6356 && (eh->elf.ref_dynamic 6357 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf)) 6358 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL 6359 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN 6360 && (!bfd_link_executable (info) 6361 || info->export_dynamic 6362 || (eh->elf.dynamic 6363 && d != NULL 6364 && (*d->match) (&d->head, NULL, eh->elf.root.root.string))) 6365 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL 6366 || !bfd_hide_sym_by_version (info->version_info, 6367 eh->elf.root.root.string))))) 6368 { 6369 asection *code_sec; 6370 struct ppc_link_hash_entry *fh; 6371 6372 eh->elf.root.u.def.section->flags |= SEC_KEEP; 6373 6374 /* Function descriptor syms cause the associated 6375 function code sym section to be marked. */ 6376 fh = defined_code_entry (eh); 6377 if (fh != NULL) 6378 { 6379 code_sec = fh->elf.root.u.def.section; 6380 code_sec->flags |= SEC_KEEP; 6381 } 6382 else if (get_opd_info (eh->elf.root.u.def.section) != NULL 6383 && opd_entry_value (eh->elf.root.u.def.section, 6384 eh->elf.root.u.def.value, 6385 &code_sec, NULL, FALSE) != (bfd_vma) -1) 6386 code_sec->flags |= SEC_KEEP; 6387 } 6388 6389 return TRUE; 6390} 6391 6392/* Return the section that should be marked against GC for a given 6393 relocation. */ 6394 6395static asection * 6396ppc64_elf_gc_mark_hook (asection *sec, 6397 struct bfd_link_info *info, 6398 Elf_Internal_Rela *rel, 6399 struct elf_link_hash_entry *h, 6400 Elf_Internal_Sym *sym) 6401{ 6402 asection *rsec; 6403 6404 /* Syms return NULL if we're marking .opd, so we avoid marking all 6405 function sections, as all functions are referenced in .opd. */ 6406 rsec = NULL; 6407 if (get_opd_info (sec) != NULL) 6408 return rsec; 6409 6410 if (h != NULL) 6411 { 6412 enum elf_ppc64_reloc_type r_type; 6413 struct ppc_link_hash_entry *eh, *fh, *fdh; 6414 6415 r_type = ELF64_R_TYPE (rel->r_info); 6416 switch (r_type) 6417 { 6418 case R_PPC64_GNU_VTINHERIT: 6419 case R_PPC64_GNU_VTENTRY: 6420 break; 6421 6422 default: 6423 switch (h->root.type) 6424 { 6425 case bfd_link_hash_defined: 6426 case bfd_link_hash_defweak: 6427 eh = (struct ppc_link_hash_entry *) h; 6428 fdh = defined_func_desc (eh); 6429 if (fdh != NULL) 6430 eh = fdh; 6431 6432 /* Function descriptor syms cause the associated 6433 function code sym section to be marked. */ 6434 fh = defined_code_entry (eh); 6435 if (fh != NULL) 6436 { 6437 /* They also mark their opd section. */ 6438 eh->elf.root.u.def.section->gc_mark = 1; 6439 6440 rsec = fh->elf.root.u.def.section; 6441 } 6442 else if (get_opd_info (eh->elf.root.u.def.section) != NULL 6443 && opd_entry_value (eh->elf.root.u.def.section, 6444 eh->elf.root.u.def.value, 6445 &rsec, NULL, FALSE) != (bfd_vma) -1) 6446 eh->elf.root.u.def.section->gc_mark = 1; 6447 else 6448 rsec = h->root.u.def.section; 6449 break; 6450 6451 case bfd_link_hash_common: 6452 rsec = h->root.u.c.p->section; 6453 break; 6454 6455 default: 6456 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 6457 } 6458 } 6459 } 6460 else 6461 { 6462 struct _opd_sec_data *opd; 6463 6464 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); 6465 opd = get_opd_info (rsec); 6466 if (opd != NULL && opd->func_sec != NULL) 6467 { 6468 rsec->gc_mark = 1; 6469 6470 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)]; 6471 } 6472 } 6473 6474 return rsec; 6475} 6476 6477/* Update the .got, .plt. and dynamic reloc reference counts for the 6478 section being removed. */ 6479 6480static bfd_boolean 6481ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, 6482 asection *sec, const Elf_Internal_Rela *relocs) 6483{ 6484 struct ppc_link_hash_table *htab; 6485 Elf_Internal_Shdr *symtab_hdr; 6486 struct elf_link_hash_entry **sym_hashes; 6487 struct got_entry **local_got_ents; 6488 const Elf_Internal_Rela *rel, *relend; 6489 6490 if (bfd_link_relocatable (info)) 6491 return TRUE; 6492 6493 if ((sec->flags & SEC_ALLOC) == 0) 6494 return TRUE; 6495 6496 elf_section_data (sec)->local_dynrel = NULL; 6497 6498 htab = ppc_hash_table (info); 6499 if (htab == NULL) 6500 return FALSE; 6501 6502 symtab_hdr = &elf_symtab_hdr (abfd); 6503 sym_hashes = elf_sym_hashes (abfd); 6504 local_got_ents = elf_local_got_ents (abfd); 6505 6506 relend = relocs + sec->reloc_count; 6507 for (rel = relocs; rel < relend; rel++) 6508 { 6509 unsigned long r_symndx; 6510 enum elf_ppc64_reloc_type r_type; 6511 struct elf_link_hash_entry *h = NULL; 6512 struct plt_entry **plt_list; 6513 unsigned char tls_type = 0; 6514 6515 r_symndx = ELF64_R_SYM (rel->r_info); 6516 r_type = ELF64_R_TYPE (rel->r_info); 6517 if (r_symndx >= symtab_hdr->sh_info) 6518 { 6519 struct ppc_link_hash_entry *eh; 6520 struct elf_dyn_relocs **pp; 6521 struct elf_dyn_relocs *p; 6522 6523 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 6524 h = elf_follow_link (h); 6525 eh = (struct ppc_link_hash_entry *) h; 6526 6527 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 6528 if (p->sec == sec) 6529 { 6530 /* Everything must go for SEC. */ 6531 *pp = p->next; 6532 break; 6533 } 6534 } 6535 6536 switch (r_type) 6537 { 6538 case R_PPC64_GOT_TLSLD16: 6539 case R_PPC64_GOT_TLSLD16_LO: 6540 case R_PPC64_GOT_TLSLD16_HI: 6541 case R_PPC64_GOT_TLSLD16_HA: 6542 tls_type = TLS_TLS | TLS_LD; 6543 goto dogot; 6544 6545 case R_PPC64_GOT_TLSGD16: 6546 case R_PPC64_GOT_TLSGD16_LO: 6547 case R_PPC64_GOT_TLSGD16_HI: 6548 case R_PPC64_GOT_TLSGD16_HA: 6549 tls_type = TLS_TLS | TLS_GD; 6550 goto dogot; 6551 6552 case R_PPC64_GOT_TPREL16_DS: 6553 case R_PPC64_GOT_TPREL16_LO_DS: 6554 case R_PPC64_GOT_TPREL16_HI: 6555 case R_PPC64_GOT_TPREL16_HA: 6556 tls_type = TLS_TLS | TLS_TPREL; 6557 goto dogot; 6558 6559 case R_PPC64_GOT_DTPREL16_DS: 6560 case R_PPC64_GOT_DTPREL16_LO_DS: 6561 case R_PPC64_GOT_DTPREL16_HI: 6562 case R_PPC64_GOT_DTPREL16_HA: 6563 tls_type = TLS_TLS | TLS_DTPREL; 6564 goto dogot; 6565 6566 case R_PPC64_GOT16: 6567 case R_PPC64_GOT16_DS: 6568 case R_PPC64_GOT16_HA: 6569 case R_PPC64_GOT16_HI: 6570 case R_PPC64_GOT16_LO: 6571 case R_PPC64_GOT16_LO_DS: 6572 dogot: 6573 { 6574 struct got_entry *ent; 6575 6576 if (h != NULL) 6577 ent = h->got.glist; 6578 else 6579 ent = local_got_ents[r_symndx]; 6580 6581 for (; ent != NULL; ent = ent->next) 6582 if (ent->addend == rel->r_addend 6583 && ent->owner == abfd 6584 && ent->tls_type == tls_type) 6585 break; 6586 if (ent == NULL) 6587 abort (); 6588 if (ent->got.refcount > 0) 6589 ent->got.refcount -= 1; 6590 } 6591 break; 6592 6593 case R_PPC64_PLT16_HA: 6594 case R_PPC64_PLT16_HI: 6595 case R_PPC64_PLT16_LO: 6596 case R_PPC64_PLT32: 6597 case R_PPC64_PLT64: 6598 case R_PPC64_REL14: 6599 case R_PPC64_REL14_BRNTAKEN: 6600 case R_PPC64_REL14_BRTAKEN: 6601 case R_PPC64_REL24: 6602 plt_list = NULL; 6603 if (h != NULL) 6604 plt_list = &h->plt.plist; 6605 else if (local_got_ents != NULL) 6606 { 6607 struct plt_entry **local_plt = (struct plt_entry **) 6608 (local_got_ents + symtab_hdr->sh_info); 6609 unsigned char *local_got_tls_masks = (unsigned char *) 6610 (local_plt + symtab_hdr->sh_info); 6611 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 6612 plt_list = local_plt + r_symndx; 6613 } 6614 if (plt_list) 6615 { 6616 struct plt_entry *ent; 6617 6618 for (ent = *plt_list; ent != NULL; ent = ent->next) 6619 if (ent->addend == rel->r_addend) 6620 break; 6621 if (ent != NULL && ent->plt.refcount > 0) 6622 ent->plt.refcount -= 1; 6623 } 6624 break; 6625 6626 default: 6627 break; 6628 } 6629 } 6630 return TRUE; 6631} 6632 6633/* The maximum size of .sfpr. */ 6634#define SFPR_MAX (218*4) 6635 6636struct sfpr_def_parms 6637{ 6638 const char name[12]; 6639 unsigned char lo, hi; 6640 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int); 6641 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int); 6642}; 6643 6644/* Auto-generate _save*, _rest* functions in .sfpr. 6645 If STUB_SEC is non-null, define alias symbols in STUB_SEC 6646 instead. */ 6647 6648static bfd_boolean 6649sfpr_define (struct bfd_link_info *info, 6650 const struct sfpr_def_parms *parm, 6651 asection *stub_sec) 6652{ 6653 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6654 unsigned int i; 6655 size_t len = strlen (parm->name); 6656 bfd_boolean writing = FALSE; 6657 char sym[16]; 6658 6659 if (htab == NULL) 6660 return FALSE; 6661 6662 memcpy (sym, parm->name, len); 6663 sym[len + 2] = 0; 6664 6665 for (i = parm->lo; i <= parm->hi; i++) 6666 { 6667 struct ppc_link_hash_entry *h; 6668 6669 sym[len + 0] = i / 10 + '0'; 6670 sym[len + 1] = i % 10 + '0'; 6671 h = (struct ppc_link_hash_entry *) 6672 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE); 6673 if (stub_sec != NULL) 6674 { 6675 if (h != NULL 6676 && h->elf.root.type == bfd_link_hash_defined 6677 && h->elf.root.u.def.section == htab->sfpr) 6678 { 6679 struct elf_link_hash_entry *s; 6680 char buf[32]; 6681 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym); 6682 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE); 6683 if (s == NULL) 6684 return FALSE; 6685 if (s->root.type == bfd_link_hash_new 6686 || (s->root.type = bfd_link_hash_defined 6687 && s->root.u.def.section == stub_sec)) 6688 { 6689 s->root.type = bfd_link_hash_defined; 6690 s->root.u.def.section = stub_sec; 6691 s->root.u.def.value = (stub_sec->size 6692 + h->elf.root.u.def.value); 6693 s->ref_regular = 1; 6694 s->def_regular = 1; 6695 s->ref_regular_nonweak = 1; 6696 s->forced_local = 1; 6697 s->non_elf = 0; 6698 s->root.linker_def = 1; 6699 } 6700 } 6701 continue; 6702 } 6703 if (h != NULL) 6704 { 6705 h->save_res = 1; 6706 if (!h->elf.def_regular) 6707 { 6708 h->elf.root.type = bfd_link_hash_defined; 6709 h->elf.root.u.def.section = htab->sfpr; 6710 h->elf.root.u.def.value = htab->sfpr->size; 6711 h->elf.type = STT_FUNC; 6712 h->elf.def_regular = 1; 6713 h->elf.non_elf = 0; 6714 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE); 6715 writing = TRUE; 6716 if (htab->sfpr->contents == NULL) 6717 { 6718 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX); 6719 if (htab->sfpr->contents == NULL) 6720 return FALSE; 6721 } 6722 } 6723 } 6724 if (writing) 6725 { 6726 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; 6727 if (i != parm->hi) 6728 p = (*parm->write_ent) (htab->elf.dynobj, p, i); 6729 else 6730 p = (*parm->write_tail) (htab->elf.dynobj, p, i); 6731 htab->sfpr->size = p - htab->sfpr->contents; 6732 } 6733 } 6734 6735 return TRUE; 6736} 6737 6738static bfd_byte * 6739savegpr0 (bfd *abfd, bfd_byte *p, int r) 6740{ 6741 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6742 return p + 4; 6743} 6744 6745static bfd_byte * 6746savegpr0_tail (bfd *abfd, bfd_byte *p, int r) 6747{ 6748 p = savegpr0 (abfd, p, r); 6749 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); 6750 p = p + 4; 6751 bfd_put_32 (abfd, BLR, p); 6752 return p + 4; 6753} 6754 6755static bfd_byte * 6756restgpr0 (bfd *abfd, bfd_byte *p, int r) 6757{ 6758 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6759 return p + 4; 6760} 6761 6762static bfd_byte * 6763restgpr0_tail (bfd *abfd, bfd_byte *p, int r) 6764{ 6765 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); 6766 p = p + 4; 6767 p = restgpr0 (abfd, p, r); 6768 bfd_put_32 (abfd, MTLR_R0, p); 6769 p = p + 4; 6770 if (r == 29) 6771 { 6772 p = restgpr0 (abfd, p, 30); 6773 p = restgpr0 (abfd, p, 31); 6774 } 6775 bfd_put_32 (abfd, BLR, p); 6776 return p + 4; 6777} 6778 6779static bfd_byte * 6780savegpr1 (bfd *abfd, bfd_byte *p, int r) 6781{ 6782 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6783 return p + 4; 6784} 6785 6786static bfd_byte * 6787savegpr1_tail (bfd *abfd, bfd_byte *p, int r) 6788{ 6789 p = savegpr1 (abfd, p, r); 6790 bfd_put_32 (abfd, BLR, p); 6791 return p + 4; 6792} 6793 6794static bfd_byte * 6795restgpr1 (bfd *abfd, bfd_byte *p, int r) 6796{ 6797 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6798 return p + 4; 6799} 6800 6801static bfd_byte * 6802restgpr1_tail (bfd *abfd, bfd_byte *p, int r) 6803{ 6804 p = restgpr1 (abfd, p, r); 6805 bfd_put_32 (abfd, BLR, p); 6806 return p + 4; 6807} 6808 6809static bfd_byte * 6810savefpr (bfd *abfd, bfd_byte *p, int r) 6811{ 6812 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6813 return p + 4; 6814} 6815 6816static bfd_byte * 6817savefpr0_tail (bfd *abfd, bfd_byte *p, int r) 6818{ 6819 p = savefpr (abfd, p, r); 6820 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); 6821 p = p + 4; 6822 bfd_put_32 (abfd, BLR, p); 6823 return p + 4; 6824} 6825 6826static bfd_byte * 6827restfpr (bfd *abfd, bfd_byte *p, int r) 6828{ 6829 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); 6830 return p + 4; 6831} 6832 6833static bfd_byte * 6834restfpr0_tail (bfd *abfd, bfd_byte *p, int r) 6835{ 6836 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); 6837 p = p + 4; 6838 p = restfpr (abfd, p, r); 6839 bfd_put_32 (abfd, MTLR_R0, p); 6840 p = p + 4; 6841 if (r == 29) 6842 { 6843 p = restfpr (abfd, p, 30); 6844 p = restfpr (abfd, p, 31); 6845 } 6846 bfd_put_32 (abfd, BLR, p); 6847 return p + 4; 6848} 6849 6850static bfd_byte * 6851savefpr1_tail (bfd *abfd, bfd_byte *p, int r) 6852{ 6853 p = savefpr (abfd, p, r); 6854 bfd_put_32 (abfd, BLR, p); 6855 return p + 4; 6856} 6857 6858static bfd_byte * 6859restfpr1_tail (bfd *abfd, bfd_byte *p, int r) 6860{ 6861 p = restfpr (abfd, p, r); 6862 bfd_put_32 (abfd, BLR, p); 6863 return p + 4; 6864} 6865 6866static bfd_byte * 6867savevr (bfd *abfd, bfd_byte *p, int r) 6868{ 6869 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); 6870 p = p + 4; 6871 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); 6872 return p + 4; 6873} 6874 6875static bfd_byte * 6876savevr_tail (bfd *abfd, bfd_byte *p, int r) 6877{ 6878 p = savevr (abfd, p, r); 6879 bfd_put_32 (abfd, BLR, p); 6880 return p + 4; 6881} 6882 6883static bfd_byte * 6884restvr (bfd *abfd, bfd_byte *p, int r) 6885{ 6886 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); 6887 p = p + 4; 6888 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); 6889 return p + 4; 6890} 6891 6892static bfd_byte * 6893restvr_tail (bfd *abfd, bfd_byte *p, int r) 6894{ 6895 p = restvr (abfd, p, r); 6896 bfd_put_32 (abfd, BLR, p); 6897 return p + 4; 6898} 6899 6900/* Called via elf_link_hash_traverse to transfer dynamic linking 6901 information on function code symbol entries to their corresponding 6902 function descriptor symbol entries. */ 6903 6904static bfd_boolean 6905func_desc_adjust (struct elf_link_hash_entry *h, void *inf) 6906{ 6907 struct bfd_link_info *info; 6908 struct ppc_link_hash_table *htab; 6909 struct plt_entry *ent; 6910 struct ppc_link_hash_entry *fh; 6911 struct ppc_link_hash_entry *fdh; 6912 bfd_boolean force_local; 6913 6914 fh = (struct ppc_link_hash_entry *) h; 6915 if (fh->elf.root.type == bfd_link_hash_indirect) 6916 return TRUE; 6917 6918 info = inf; 6919 htab = ppc_hash_table (info); 6920 if (htab == NULL) 6921 return FALSE; 6922 6923 /* Resolve undefined references to dot-symbols as the value 6924 in the function descriptor, if we have one in a regular object. 6925 This is to satisfy cases like ".quad .foo". Calls to functions 6926 in dynamic objects are handled elsewhere. */ 6927 if (fh->elf.root.type == bfd_link_hash_undefweak 6928 && fh->was_undefined 6929 && (fdh = defined_func_desc (fh)) != NULL 6930 && get_opd_info (fdh->elf.root.u.def.section) != NULL 6931 && opd_entry_value (fdh->elf.root.u.def.section, 6932 fdh->elf.root.u.def.value, 6933 &fh->elf.root.u.def.section, 6934 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1) 6935 { 6936 fh->elf.root.type = fdh->elf.root.type; 6937 fh->elf.forced_local = 1; 6938 fh->elf.def_regular = fdh->elf.def_regular; 6939 fh->elf.def_dynamic = fdh->elf.def_dynamic; 6940 } 6941 6942 /* If this is a function code symbol, transfer dynamic linking 6943 information to the function descriptor symbol. */ 6944 if (!fh->is_func) 6945 return TRUE; 6946 6947 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) 6948 if (ent->plt.refcount > 0) 6949 break; 6950 if (ent == NULL 6951 || fh->elf.root.root.string[0] != '.' 6952 || fh->elf.root.root.string[1] == '\0') 6953 return TRUE; 6954 6955 /* Find the corresponding function descriptor symbol. Create it 6956 as undefined if necessary. */ 6957 6958 fdh = lookup_fdh (fh, htab); 6959 if (fdh == NULL 6960 && !bfd_link_executable (info) 6961 && (fh->elf.root.type == bfd_link_hash_undefined 6962 || fh->elf.root.type == bfd_link_hash_undefweak)) 6963 { 6964 fdh = make_fdh (info, fh); 6965 if (fdh == NULL) 6966 return FALSE; 6967 } 6968 6969 /* Fake function descriptors are made undefweak. If the function 6970 code symbol is strong undefined, make the fake sym the same. 6971 If the function code symbol is defined, then force the fake 6972 descriptor local; We can't support overriding of symbols in a 6973 shared library on a fake descriptor. */ 6974 6975 if (fdh != NULL 6976 && fdh->fake 6977 && fdh->elf.root.type == bfd_link_hash_undefweak) 6978 { 6979 if (fh->elf.root.type == bfd_link_hash_undefined) 6980 { 6981 fdh->elf.root.type = bfd_link_hash_undefined; 6982 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root); 6983 } 6984 else if (fh->elf.root.type == bfd_link_hash_defined 6985 || fh->elf.root.type == bfd_link_hash_defweak) 6986 { 6987 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE); 6988 } 6989 } 6990 6991 if (fdh != NULL 6992 && !fdh->elf.forced_local 6993 && (!bfd_link_executable (info) 6994 || fdh->elf.def_dynamic 6995 || fdh->elf.ref_dynamic 6996 || (fdh->elf.root.type == bfd_link_hash_undefweak 6997 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT))) 6998 { 6999 if (fdh->elf.dynindx == -1) 7000 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) 7001 return FALSE; 7002 fdh->elf.ref_regular |= fh->elf.ref_regular; 7003 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; 7004 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; 7005 fdh->elf.non_got_ref |= fh->elf.non_got_ref; 7006 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT) 7007 { 7008 move_plt_plist (fh, fdh); 7009 fdh->elf.needs_plt = 1; 7010 } 7011 fdh->is_func_descriptor = 1; 7012 fdh->oh = fh; 7013 fh->oh = fdh; 7014 } 7015 7016 /* Now that the info is on the function descriptor, clear the 7017 function code sym info. Any function code syms for which we 7018 don't have a definition in a regular file, we force local. 7019 This prevents a shared library from exporting syms that have 7020 been imported from another library. Function code syms that 7021 are really in the library we must leave global to prevent the 7022 linker dragging in a definition from a static library. */ 7023 force_local = (!fh->elf.def_regular 7024 || fdh == NULL 7025 || !fdh->elf.def_regular 7026 || fdh->elf.forced_local); 7027 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); 7028 7029 return TRUE; 7030} 7031 7032static const struct sfpr_def_parms save_res_funcs[] = 7033 { 7034 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, 7035 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, 7036 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, 7037 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, 7038 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, 7039 { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, 7040 { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, 7041 { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, 7042 { "._savef", 14, 31, savefpr, savefpr1_tail }, 7043 { "._restf", 14, 31, restfpr, restfpr1_tail }, 7044 { "_savevr_", 20, 31, savevr, savevr_tail }, 7045 { "_restvr_", 20, 31, restvr, restvr_tail } 7046 }; 7047 7048/* Called near the start of bfd_elf_size_dynamic_sections. We use 7049 this hook to a) provide some gcc support functions, and b) transfer 7050 dynamic linking information gathered so far on function code symbol 7051 entries, to their corresponding function descriptor symbol entries. */ 7052 7053static bfd_boolean 7054ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, 7055 struct bfd_link_info *info) 7056{ 7057 struct ppc_link_hash_table *htab; 7058 7059 htab = ppc_hash_table (info); 7060 if (htab == NULL) 7061 return FALSE; 7062 7063 /* Provide any missing _save* and _rest* functions. */ 7064 if (htab->sfpr != NULL) 7065 { 7066 unsigned int i; 7067 7068 htab->sfpr->size = 0; 7069 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) 7070 if (!sfpr_define (info, &save_res_funcs[i], NULL)) 7071 return FALSE; 7072 if (htab->sfpr->size == 0) 7073 htab->sfpr->flags |= SEC_EXCLUDE; 7074 } 7075 7076 if (bfd_link_relocatable (info)) 7077 return TRUE; 7078 7079 if (htab->elf.hgot != NULL) 7080 { 7081 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE); 7082 /* Make .TOC. defined so as to prevent it being made dynamic. 7083 The wrong value here is fixed later in ppc64_elf_set_toc. */ 7084 if (!htab->elf.hgot->def_regular 7085 || htab->elf.hgot->root.type != bfd_link_hash_defined) 7086 { 7087 htab->elf.hgot->root.type = bfd_link_hash_defined; 7088 htab->elf.hgot->root.u.def.value = 0; 7089 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr; 7090 htab->elf.hgot->def_regular = 1; 7091 htab->elf.hgot->root.linker_def = 1; 7092 } 7093 htab->elf.hgot->type = STT_OBJECT; 7094 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1)) 7095 | STV_HIDDEN); 7096 } 7097 7098 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); 7099 7100 return TRUE; 7101} 7102 7103/* Return true if we have dynamic relocs that apply to read-only sections. */ 7104 7105static bfd_boolean 7106readonly_dynrelocs (struct elf_link_hash_entry *h) 7107{ 7108 struct ppc_link_hash_entry *eh; 7109 struct elf_dyn_relocs *p; 7110 7111 eh = (struct ppc_link_hash_entry *) h; 7112 for (p = eh->dyn_relocs; p != NULL; p = p->next) 7113 { 7114 asection *s = p->sec->output_section; 7115 7116 if (s != NULL && (s->flags & SEC_READONLY) != 0) 7117 return TRUE; 7118 } 7119 return FALSE; 7120} 7121 7122/* Adjust a symbol defined by a dynamic object and referenced by a 7123 regular object. The current definition is in some section of the 7124 dynamic object, but we're not including those sections. We have to 7125 change the definition to something the rest of the link can 7126 understand. */ 7127 7128static bfd_boolean 7129ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 7130 struct elf_link_hash_entry *h) 7131{ 7132 struct ppc_link_hash_table *htab; 7133 asection *s; 7134 7135 htab = ppc_hash_table (info); 7136 if (htab == NULL) 7137 return FALSE; 7138 7139 /* Deal with function syms. */ 7140 if (h->type == STT_FUNC 7141 || h->type == STT_GNU_IFUNC 7142 || h->needs_plt) 7143 { 7144 /* Clear procedure linkage table information for any symbol that 7145 won't need a .plt entry. */ 7146 struct plt_entry *ent; 7147 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 7148 if (ent->plt.refcount > 0) 7149 break; 7150 if (ent == NULL 7151 || (h->type != STT_GNU_IFUNC 7152 && (SYMBOL_CALLS_LOCAL (info, h) 7153 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 7154 && h->root.type == bfd_link_hash_undefweak))) 7155 || ((struct ppc_link_hash_entry *) h)->save_res) 7156 { 7157 h->plt.plist = NULL; 7158 h->needs_plt = 0; 7159 h->pointer_equality_needed = 0; 7160 } 7161 else if (abiversion (info->output_bfd) == 2) 7162 { 7163 /* Taking a function's address in a read/write section 7164 doesn't require us to define the function symbol in the 7165 executable on a global entry stub. A dynamic reloc can 7166 be used instead. */ 7167 if (h->pointer_equality_needed 7168 && h->type != STT_GNU_IFUNC 7169 && !readonly_dynrelocs (h)) 7170 { 7171 h->pointer_equality_needed = 0; 7172 h->non_got_ref = 0; 7173 } 7174 7175 /* After adjust_dynamic_symbol, non_got_ref set in the 7176 non-shared case means that we have allocated space in 7177 .dynbss for the symbol and thus dyn_relocs for this 7178 symbol should be discarded. 7179 If we get here we know we are making a PLT entry for this 7180 symbol, and in an executable we'd normally resolve 7181 relocations against this symbol to the PLT entry. Allow 7182 dynamic relocs if the reference is weak, and the dynamic 7183 relocs will not cause text relocation. */ 7184 else if (!h->ref_regular_nonweak 7185 && h->non_got_ref 7186 && h->type != STT_GNU_IFUNC 7187 && !readonly_dynrelocs (h)) 7188 h->non_got_ref = 0; 7189 7190 /* If making a plt entry, then we don't need copy relocs. */ 7191 return TRUE; 7192 } 7193 } 7194 else 7195 h->plt.plist = NULL; 7196 7197 /* If this is a weak symbol, and there is a real definition, the 7198 processor independent code will have arranged for us to see the 7199 real definition first, and we can just use the same value. */ 7200 if (h->u.weakdef != NULL) 7201 { 7202 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 7203 || h->u.weakdef->root.type == bfd_link_hash_defweak); 7204 h->root.u.def.section = h->u.weakdef->root.u.def.section; 7205 h->root.u.def.value = h->u.weakdef->root.u.def.value; 7206 if (ELIMINATE_COPY_RELOCS) 7207 h->non_got_ref = h->u.weakdef->non_got_ref; 7208 return TRUE; 7209 } 7210 7211 /* If we are creating a shared library, we must presume that the 7212 only references to the symbol are via the global offset table. 7213 For such cases we need not do anything here; the relocations will 7214 be handled correctly by relocate_section. */ 7215 if (bfd_link_pic (info)) 7216 return TRUE; 7217 7218 /* If there are no references to this symbol that do not use the 7219 GOT, we don't need to generate a copy reloc. */ 7220 if (!h->non_got_ref) 7221 return TRUE; 7222 7223 /* Don't generate a copy reloc for symbols defined in the executable. */ 7224 if (!h->def_dynamic || !h->ref_regular || h->def_regular) 7225 return TRUE; 7226 7227 /* If -z nocopyreloc was given, don't generate them either. */ 7228 if (info->nocopyreloc) 7229 { 7230 h->non_got_ref = 0; 7231 return TRUE; 7232 } 7233 7234 /* If we didn't find any dynamic relocs in read-only sections, then 7235 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 7236 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h)) 7237 { 7238 h->non_got_ref = 0; 7239 return TRUE; 7240 } 7241 7242 /* Protected variables do not work with .dynbss. The copy in 7243 .dynbss won't be used by the shared library with the protected 7244 definition for the variable. Text relocations are preferable 7245 to an incorrect program. */ 7246 if (h->protected_def) 7247 { 7248 h->non_got_ref = 0; 7249 return TRUE; 7250 } 7251 7252 if (h->plt.plist != NULL) 7253 { 7254 /* We should never get here, but unfortunately there are versions 7255 of gcc out there that improperly (for this ABI) put initialized 7256 function pointers, vtable refs and suchlike in read-only 7257 sections. Allow them to proceed, but warn that this might 7258 break at runtime. */ 7259 info->callbacks->einfo 7260 (_("%P: copy reloc against `%T' requires lazy plt linking; " 7261 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"), 7262 h->root.root.string); 7263 } 7264 7265 /* This is a reference to a symbol defined by a dynamic object which 7266 is not a function. */ 7267 7268 /* We must allocate the symbol in our .dynbss section, which will 7269 become part of the .bss section of the executable. There will be 7270 an entry for this symbol in the .dynsym section. The dynamic 7271 object will contain position independent code, so all references 7272 from the dynamic object to this symbol will go through the global 7273 offset table. The dynamic linker will use the .dynsym entry to 7274 determine the address it must put in the global offset table, so 7275 both the dynamic object and the regular object will refer to the 7276 same memory location for the variable. */ 7277 7278 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker 7279 to copy the initial value out of the dynamic object and into the 7280 runtime process image. We need to remember the offset into the 7281 .rela.bss section we are going to use. */ 7282 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 7283 { 7284 htab->relbss->size += sizeof (Elf64_External_Rela); 7285 h->needs_copy = 1; 7286 } 7287 7288 s = htab->dynbss; 7289 7290 return _bfd_elf_adjust_dynamic_copy (info, h, s); 7291} 7292 7293/* If given a function descriptor symbol, hide both the function code 7294 sym and the descriptor. */ 7295static void 7296ppc64_elf_hide_symbol (struct bfd_link_info *info, 7297 struct elf_link_hash_entry *h, 7298 bfd_boolean force_local) 7299{ 7300 struct ppc_link_hash_entry *eh; 7301 _bfd_elf_link_hash_hide_symbol (info, h, force_local); 7302 7303 eh = (struct ppc_link_hash_entry *) h; 7304 if (eh->is_func_descriptor) 7305 { 7306 struct ppc_link_hash_entry *fh = eh->oh; 7307 7308 if (fh == NULL) 7309 { 7310 const char *p, *q; 7311 struct ppc_link_hash_table *htab; 7312 char save; 7313 7314 /* We aren't supposed to use alloca in BFD because on 7315 systems which do not have alloca the version in libiberty 7316 calls xmalloc, which might cause the program to crash 7317 when it runs out of memory. This function doesn't have a 7318 return status, so there's no way to gracefully return an 7319 error. So cheat. We know that string[-1] can be safely 7320 accessed; It's either a string in an ELF string table, 7321 or allocated in an objalloc structure. */ 7322 7323 p = eh->elf.root.root.string - 1; 7324 save = *p; 7325 *(char *) p = '.'; 7326 htab = ppc_hash_table (info); 7327 if (htab == NULL) 7328 return; 7329 7330 fh = (struct ppc_link_hash_entry *) 7331 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); 7332 *(char *) p = save; 7333 7334 /* Unfortunately, if it so happens that the string we were 7335 looking for was allocated immediately before this string, 7336 then we overwrote the string terminator. That's the only 7337 reason the lookup should fail. */ 7338 if (fh == NULL) 7339 { 7340 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); 7341 while (q >= eh->elf.root.root.string && *q == *p) 7342 --q, --p; 7343 if (q < eh->elf.root.root.string && *p == '.') 7344 fh = (struct ppc_link_hash_entry *) 7345 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); 7346 } 7347 if (fh != NULL) 7348 { 7349 eh->oh = fh; 7350 fh->oh = eh; 7351 } 7352 } 7353 if (fh != NULL) 7354 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); 7355 } 7356} 7357 7358static bfd_boolean 7359get_sym_h (struct elf_link_hash_entry **hp, 7360 Elf_Internal_Sym **symp, 7361 asection **symsecp, 7362 unsigned char **tls_maskp, 7363 Elf_Internal_Sym **locsymsp, 7364 unsigned long r_symndx, 7365 bfd *ibfd) 7366{ 7367 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 7368 7369 if (r_symndx >= symtab_hdr->sh_info) 7370 { 7371 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 7372 struct elf_link_hash_entry *h; 7373 7374 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 7375 h = elf_follow_link (h); 7376 7377 if (hp != NULL) 7378 *hp = h; 7379 7380 if (symp != NULL) 7381 *symp = NULL; 7382 7383 if (symsecp != NULL) 7384 { 7385 asection *symsec = NULL; 7386 if (h->root.type == bfd_link_hash_defined 7387 || h->root.type == bfd_link_hash_defweak) 7388 symsec = h->root.u.def.section; 7389 *symsecp = symsec; 7390 } 7391 7392 if (tls_maskp != NULL) 7393 { 7394 struct ppc_link_hash_entry *eh; 7395 7396 eh = (struct ppc_link_hash_entry *) h; 7397 *tls_maskp = &eh->tls_mask; 7398 } 7399 } 7400 else 7401 { 7402 Elf_Internal_Sym *sym; 7403 Elf_Internal_Sym *locsyms = *locsymsp; 7404 7405 if (locsyms == NULL) 7406 { 7407 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 7408 if (locsyms == NULL) 7409 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 7410 symtab_hdr->sh_info, 7411 0, NULL, NULL, NULL); 7412 if (locsyms == NULL) 7413 return FALSE; 7414 *locsymsp = locsyms; 7415 } 7416 sym = locsyms + r_symndx; 7417 7418 if (hp != NULL) 7419 *hp = NULL; 7420 7421 if (symp != NULL) 7422 *symp = sym; 7423 7424 if (symsecp != NULL) 7425 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); 7426 7427 if (tls_maskp != NULL) 7428 { 7429 struct got_entry **lgot_ents; 7430 unsigned char *tls_mask; 7431 7432 tls_mask = NULL; 7433 lgot_ents = elf_local_got_ents (ibfd); 7434 if (lgot_ents != NULL) 7435 { 7436 struct plt_entry **local_plt = (struct plt_entry **) 7437 (lgot_ents + symtab_hdr->sh_info); 7438 unsigned char *lgot_masks = (unsigned char *) 7439 (local_plt + symtab_hdr->sh_info); 7440 tls_mask = &lgot_masks[r_symndx]; 7441 } 7442 *tls_maskp = tls_mask; 7443 } 7444 } 7445 return TRUE; 7446} 7447 7448/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on 7449 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD 7450 type suitable for optimization, and 1 otherwise. */ 7451 7452static int 7453get_tls_mask (unsigned char **tls_maskp, 7454 unsigned long *toc_symndx, 7455 bfd_vma *toc_addend, 7456 Elf_Internal_Sym **locsymsp, 7457 const Elf_Internal_Rela *rel, 7458 bfd *ibfd) 7459{ 7460 unsigned long r_symndx; 7461 int next_r; 7462 struct elf_link_hash_entry *h; 7463 Elf_Internal_Sym *sym; 7464 asection *sec; 7465 bfd_vma off; 7466 7467 r_symndx = ELF64_R_SYM (rel->r_info); 7468 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) 7469 return 0; 7470 7471 if ((*tls_maskp != NULL && **tls_maskp != 0) 7472 || sec == NULL 7473 || ppc64_elf_section_data (sec) == NULL 7474 || ppc64_elf_section_data (sec)->sec_type != sec_toc) 7475 return 1; 7476 7477 /* Look inside a TOC section too. */ 7478 if (h != NULL) 7479 { 7480 BFD_ASSERT (h->root.type == bfd_link_hash_defined); 7481 off = h->root.u.def.value; 7482 } 7483 else 7484 off = sym->st_value; 7485 off += rel->r_addend; 7486 BFD_ASSERT (off % 8 == 0); 7487 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8]; 7488 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1]; 7489 if (toc_symndx != NULL) 7490 *toc_symndx = r_symndx; 7491 if (toc_addend != NULL) 7492 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8]; 7493 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) 7494 return 0; 7495 if ((h == NULL || is_static_defined (h)) 7496 && (next_r == -1 || next_r == -2)) 7497 return 1 - next_r; 7498 return 1; 7499} 7500 7501/* Find (or create) an entry in the tocsave hash table. */ 7502 7503static struct tocsave_entry * 7504tocsave_find (struct ppc_link_hash_table *htab, 7505 enum insert_option insert, 7506 Elf_Internal_Sym **local_syms, 7507 const Elf_Internal_Rela *irela, 7508 bfd *ibfd) 7509{ 7510 unsigned long r_indx; 7511 struct elf_link_hash_entry *h; 7512 Elf_Internal_Sym *sym; 7513 struct tocsave_entry ent, *p; 7514 hashval_t hash; 7515 struct tocsave_entry **slot; 7516 7517 r_indx = ELF64_R_SYM (irela->r_info); 7518 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd)) 7519 return NULL; 7520 if (ent.sec == NULL || ent.sec->output_section == NULL) 7521 { 7522 (*_bfd_error_handler) 7523 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation")); 7524 return NULL; 7525 } 7526 7527 if (h != NULL) 7528 ent.offset = h->root.u.def.value; 7529 else 7530 ent.offset = sym->st_value; 7531 ent.offset += irela->r_addend; 7532 7533 hash = tocsave_htab_hash (&ent); 7534 slot = ((struct tocsave_entry **) 7535 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert)); 7536 if (slot == NULL) 7537 return NULL; 7538 7539 if (*slot == NULL) 7540 { 7541 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p)); 7542 if (p == NULL) 7543 return NULL; 7544 *p = ent; 7545 *slot = p; 7546 } 7547 return *slot; 7548} 7549 7550/* Adjust all global syms defined in opd sections. In gcc generated 7551 code for the old ABI, these will already have been done. */ 7552 7553static bfd_boolean 7554adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) 7555{ 7556 struct ppc_link_hash_entry *eh; 7557 asection *sym_sec; 7558 struct _opd_sec_data *opd; 7559 7560 if (h->root.type == bfd_link_hash_indirect) 7561 return TRUE; 7562 7563 if (h->root.type != bfd_link_hash_defined 7564 && h->root.type != bfd_link_hash_defweak) 7565 return TRUE; 7566 7567 eh = (struct ppc_link_hash_entry *) h; 7568 if (eh->adjust_done) 7569 return TRUE; 7570 7571 sym_sec = eh->elf.root.u.def.section; 7572 opd = get_opd_info (sym_sec); 7573 if (opd != NULL && opd->adjust != NULL) 7574 { 7575 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)]; 7576 if (adjust == -1) 7577 { 7578 /* This entry has been deleted. */ 7579 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; 7580 if (dsec == NULL) 7581 { 7582 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) 7583 if (discarded_section (dsec)) 7584 { 7585 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; 7586 break; 7587 } 7588 } 7589 eh->elf.root.u.def.value = 0; 7590 eh->elf.root.u.def.section = dsec; 7591 } 7592 else 7593 eh->elf.root.u.def.value += adjust; 7594 eh->adjust_done = 1; 7595 } 7596 return TRUE; 7597} 7598 7599/* Handles decrementing dynamic reloc counts for the reloc specified by 7600 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM 7601 have already been determined. */ 7602 7603static bfd_boolean 7604dec_dynrel_count (bfd_vma r_info, 7605 asection *sec, 7606 struct bfd_link_info *info, 7607 Elf_Internal_Sym **local_syms, 7608 struct elf_link_hash_entry *h, 7609 Elf_Internal_Sym *sym) 7610{ 7611 enum elf_ppc64_reloc_type r_type; 7612 asection *sym_sec = NULL; 7613 7614 /* Can this reloc be dynamic? This switch, and later tests here 7615 should be kept in sync with the code in check_relocs. */ 7616 r_type = ELF64_R_TYPE (r_info); 7617 switch (r_type) 7618 { 7619 default: 7620 return TRUE; 7621 7622 case R_PPC64_TPREL16: 7623 case R_PPC64_TPREL16_LO: 7624 case R_PPC64_TPREL16_HI: 7625 case R_PPC64_TPREL16_HA: 7626 case R_PPC64_TPREL16_DS: 7627 case R_PPC64_TPREL16_LO_DS: 7628 case R_PPC64_TPREL16_HIGH: 7629 case R_PPC64_TPREL16_HIGHA: 7630 case R_PPC64_TPREL16_HIGHER: 7631 case R_PPC64_TPREL16_HIGHERA: 7632 case R_PPC64_TPREL16_HIGHEST: 7633 case R_PPC64_TPREL16_HIGHESTA: 7634 if (!bfd_link_pic (info)) 7635 return TRUE; 7636 7637 case R_PPC64_TPREL64: 7638 case R_PPC64_DTPMOD64: 7639 case R_PPC64_DTPREL64: 7640 case R_PPC64_ADDR64: 7641 case R_PPC64_REL30: 7642 case R_PPC64_REL32: 7643 case R_PPC64_REL64: 7644 case R_PPC64_ADDR14: 7645 case R_PPC64_ADDR14_BRNTAKEN: 7646 case R_PPC64_ADDR14_BRTAKEN: 7647 case R_PPC64_ADDR16: 7648 case R_PPC64_ADDR16_DS: 7649 case R_PPC64_ADDR16_HA: 7650 case R_PPC64_ADDR16_HI: 7651 case R_PPC64_ADDR16_HIGH: 7652 case R_PPC64_ADDR16_HIGHA: 7653 case R_PPC64_ADDR16_HIGHER: 7654 case R_PPC64_ADDR16_HIGHERA: 7655 case R_PPC64_ADDR16_HIGHEST: 7656 case R_PPC64_ADDR16_HIGHESTA: 7657 case R_PPC64_ADDR16_LO: 7658 case R_PPC64_ADDR16_LO_DS: 7659 case R_PPC64_ADDR24: 7660 case R_PPC64_ADDR32: 7661 case R_PPC64_UADDR16: 7662 case R_PPC64_UADDR32: 7663 case R_PPC64_UADDR64: 7664 case R_PPC64_TOC: 7665 break; 7666 } 7667 7668 if (local_syms != NULL) 7669 { 7670 unsigned long r_symndx; 7671 bfd *ibfd = sec->owner; 7672 7673 r_symndx = ELF64_R_SYM (r_info); 7674 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) 7675 return FALSE; 7676 } 7677 7678 if ((bfd_link_pic (info) 7679 && (must_be_dyn_reloc (info, r_type) 7680 || (h != NULL 7681 && (!SYMBOLIC_BIND (info, h) 7682 || h->root.type == bfd_link_hash_defweak 7683 || !h->def_regular)))) 7684 || (ELIMINATE_COPY_RELOCS 7685 && !bfd_link_pic (info) 7686 && h != NULL 7687 && (h->root.type == bfd_link_hash_defweak 7688 || !h->def_regular))) 7689 ; 7690 else 7691 return TRUE; 7692 7693 if (h != NULL) 7694 { 7695 struct elf_dyn_relocs *p; 7696 struct elf_dyn_relocs **pp; 7697 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; 7698 7699 /* elf_gc_sweep may have already removed all dyn relocs associated 7700 with local syms for a given section. Also, symbol flags are 7701 changed by elf_gc_sweep_symbol, confusing the test above. Don't 7702 report a dynreloc miscount. */ 7703 if (*pp == NULL && info->gc_sections) 7704 return TRUE; 7705 7706 while ((p = *pp) != NULL) 7707 { 7708 if (p->sec == sec) 7709 { 7710 if (!must_be_dyn_reloc (info, r_type)) 7711 p->pc_count -= 1; 7712 p->count -= 1; 7713 if (p->count == 0) 7714 *pp = p->next; 7715 return TRUE; 7716 } 7717 pp = &p->next; 7718 } 7719 } 7720 else 7721 { 7722 struct ppc_dyn_relocs *p; 7723 struct ppc_dyn_relocs **pp; 7724 void *vpp; 7725 bfd_boolean is_ifunc; 7726 7727 if (local_syms == NULL) 7728 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); 7729 if (sym_sec == NULL) 7730 sym_sec = sec; 7731 7732 vpp = &elf_section_data (sym_sec)->local_dynrel; 7733 pp = (struct ppc_dyn_relocs **) vpp; 7734 7735 if (*pp == NULL && info->gc_sections) 7736 return TRUE; 7737 7738 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC; 7739 while ((p = *pp) != NULL) 7740 { 7741 if (p->sec == sec && p->ifunc == is_ifunc) 7742 { 7743 p->count -= 1; 7744 if (p->count == 0) 7745 *pp = p->next; 7746 return TRUE; 7747 } 7748 pp = &p->next; 7749 } 7750 } 7751 7752 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"), 7753 sec->owner, sec); 7754 bfd_set_error (bfd_error_bad_value); 7755 return FALSE; 7756} 7757 7758/* Remove unused Official Procedure Descriptor entries. Currently we 7759 only remove those associated with functions in discarded link-once 7760 sections, or weakly defined functions that have been overridden. It 7761 would be possible to remove many more entries for statically linked 7762 applications. */ 7763 7764bfd_boolean 7765ppc64_elf_edit_opd (struct bfd_link_info *info) 7766{ 7767 bfd *ibfd; 7768 bfd_boolean some_edited = FALSE; 7769 asection *need_pad = NULL; 7770 struct ppc_link_hash_table *htab; 7771 7772 htab = ppc_hash_table (info); 7773 if (htab == NULL) 7774 return FALSE; 7775 7776 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 7777 { 7778 asection *sec; 7779 Elf_Internal_Rela *relstart, *rel, *relend; 7780 Elf_Internal_Shdr *symtab_hdr; 7781 Elf_Internal_Sym *local_syms; 7782 struct _opd_sec_data *opd; 7783 bfd_boolean need_edit, add_aux_fields, broken; 7784 bfd_size_type cnt_16b = 0; 7785 7786 if (!is_ppc64_elf (ibfd)) 7787 continue; 7788 7789 sec = bfd_get_section_by_name (ibfd, ".opd"); 7790 if (sec == NULL || sec->size == 0) 7791 continue; 7792 7793 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) 7794 continue; 7795 7796 if (sec->output_section == bfd_abs_section_ptr) 7797 continue; 7798 7799 /* Look through the section relocs. */ 7800 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) 7801 continue; 7802 7803 local_syms = NULL; 7804 symtab_hdr = &elf_symtab_hdr (ibfd); 7805 7806 /* Read the relocations. */ 7807 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 7808 info->keep_memory); 7809 if (relstart == NULL) 7810 return FALSE; 7811 7812 /* First run through the relocs to check they are sane, and to 7813 determine whether we need to edit this opd section. */ 7814 need_edit = FALSE; 7815 broken = FALSE; 7816 need_pad = sec; 7817 relend = relstart + sec->reloc_count; 7818 for (rel = relstart; rel < relend; ) 7819 { 7820 enum elf_ppc64_reloc_type r_type; 7821 unsigned long r_symndx; 7822 asection *sym_sec; 7823 struct elf_link_hash_entry *h; 7824 Elf_Internal_Sym *sym; 7825 bfd_vma offset; 7826 7827 /* .opd contains an array of 16 or 24 byte entries. We're 7828 only interested in the reloc pointing to a function entry 7829 point. */ 7830 offset = rel->r_offset; 7831 if (rel + 1 == relend 7832 || rel[1].r_offset != offset + 8) 7833 { 7834 /* If someone messes with .opd alignment then after a 7835 "ld -r" we might have padding in the middle of .opd. 7836 Also, there's nothing to prevent someone putting 7837 something silly in .opd with the assembler. No .opd 7838 optimization for them! */ 7839 broken_opd: 7840 (*_bfd_error_handler) 7841 (_("%B: .opd is not a regular array of opd entries"), ibfd); 7842 broken = TRUE; 7843 break; 7844 } 7845 7846 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 7847 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) 7848 { 7849 (*_bfd_error_handler) 7850 (_("%B: unexpected reloc type %u in .opd section"), 7851 ibfd, r_type); 7852 broken = TRUE; 7853 break; 7854 } 7855 7856 r_symndx = ELF64_R_SYM (rel->r_info); 7857 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 7858 r_symndx, ibfd)) 7859 goto error_ret; 7860 7861 if (sym_sec == NULL || sym_sec->owner == NULL) 7862 { 7863 const char *sym_name; 7864 if (h != NULL) 7865 sym_name = h->root.root.string; 7866 else 7867 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, 7868 sym_sec); 7869 7870 (*_bfd_error_handler) 7871 (_("%B: undefined sym `%s' in .opd section"), 7872 ibfd, sym_name); 7873 broken = TRUE; 7874 break; 7875 } 7876 7877 /* opd entries are always for functions defined in the 7878 current input bfd. If the symbol isn't defined in the 7879 input bfd, then we won't be using the function in this 7880 bfd; It must be defined in a linkonce section in another 7881 bfd, or is weak. It's also possible that we are 7882 discarding the function due to a linker script /DISCARD/, 7883 which we test for via the output_section. */ 7884 if (sym_sec->owner != ibfd 7885 || sym_sec->output_section == bfd_abs_section_ptr) 7886 need_edit = TRUE; 7887 7888 rel += 2; 7889 if (rel + 1 == relend 7890 || (rel + 2 < relend 7891 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)) 7892 ++rel; 7893 7894 if (rel == relend) 7895 { 7896 if (sec->size == offset + 24) 7897 { 7898 need_pad = NULL; 7899 break; 7900 } 7901 if (sec->size == offset + 16) 7902 { 7903 cnt_16b++; 7904 break; 7905 } 7906 goto broken_opd; 7907 } 7908 else if (rel + 1 < relend 7909 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 7910 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) 7911 { 7912 if (rel[0].r_offset == offset + 16) 7913 cnt_16b++; 7914 else if (rel[0].r_offset != offset + 24) 7915 goto broken_opd; 7916 } 7917 else 7918 goto broken_opd; 7919 } 7920 7921 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0; 7922 7923 if (!broken && (need_edit || add_aux_fields)) 7924 { 7925 Elf_Internal_Rela *write_rel; 7926 Elf_Internal_Shdr *rel_hdr; 7927 bfd_byte *rptr, *wptr; 7928 bfd_byte *new_contents; 7929 bfd_size_type amt; 7930 7931 new_contents = NULL; 7932 amt = OPD_NDX (sec->size) * sizeof (long); 7933 opd = &ppc64_elf_section_data (sec)->u.opd; 7934 opd->adjust = bfd_zalloc (sec->owner, amt); 7935 if (opd->adjust == NULL) 7936 return FALSE; 7937 ppc64_elf_section_data (sec)->sec_type = sec_opd; 7938 7939 /* This seems a waste of time as input .opd sections are all 7940 zeros as generated by gcc, but I suppose there's no reason 7941 this will always be so. We might start putting something in 7942 the third word of .opd entries. */ 7943 if ((sec->flags & SEC_IN_MEMORY) == 0) 7944 { 7945 bfd_byte *loc; 7946 if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) 7947 { 7948 if (loc != NULL) 7949 free (loc); 7950 error_ret: 7951 if (local_syms != NULL 7952 && symtab_hdr->contents != (unsigned char *) local_syms) 7953 free (local_syms); 7954 if (elf_section_data (sec)->relocs != relstart) 7955 free (relstart); 7956 return FALSE; 7957 } 7958 sec->contents = loc; 7959 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); 7960 } 7961 7962 elf_section_data (sec)->relocs = relstart; 7963 7964 new_contents = sec->contents; 7965 if (add_aux_fields) 7966 { 7967 new_contents = bfd_malloc (sec->size + cnt_16b * 8); 7968 if (new_contents == NULL) 7969 return FALSE; 7970 need_pad = NULL; 7971 } 7972 wptr = new_contents; 7973 rptr = sec->contents; 7974 write_rel = relstart; 7975 for (rel = relstart; rel < relend; ) 7976 { 7977 unsigned long r_symndx; 7978 asection *sym_sec; 7979 struct elf_link_hash_entry *h; 7980 struct ppc_link_hash_entry *fdh = NULL; 7981 Elf_Internal_Sym *sym; 7982 long opd_ent_size; 7983 Elf_Internal_Rela *next_rel; 7984 bfd_boolean skip; 7985 7986 r_symndx = ELF64_R_SYM (rel->r_info); 7987 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 7988 r_symndx, ibfd)) 7989 goto error_ret; 7990 7991 next_rel = rel + 2; 7992 if (next_rel + 1 == relend 7993 || (next_rel + 2 < relend 7994 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC)) 7995 ++next_rel; 7996 7997 /* See if the .opd entry is full 24 byte or 7998 16 byte (with fd_aux entry overlapped with next 7999 fd_func). */ 8000 opd_ent_size = 24; 8001 if (next_rel == relend) 8002 { 8003 if (sec->size == rel->r_offset + 16) 8004 opd_ent_size = 16; 8005 } 8006 else if (next_rel->r_offset == rel->r_offset + 16) 8007 opd_ent_size = 16; 8008 8009 if (h != NULL 8010 && h->root.root.string[0] == '.') 8011 { 8012 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab); 8013 if (fdh != NULL 8014 && fdh->elf.root.type != bfd_link_hash_defined 8015 && fdh->elf.root.type != bfd_link_hash_defweak) 8016 fdh = NULL; 8017 } 8018 8019 skip = (sym_sec->owner != ibfd 8020 || sym_sec->output_section == bfd_abs_section_ptr); 8021 if (skip) 8022 { 8023 if (fdh != NULL && sym_sec->owner == ibfd) 8024 { 8025 /* Arrange for the function descriptor sym 8026 to be dropped. */ 8027 fdh->elf.root.u.def.value = 0; 8028 fdh->elf.root.u.def.section = sym_sec; 8029 } 8030 opd->adjust[OPD_NDX (rel->r_offset)] = -1; 8031 8032 if (NO_OPD_RELOCS || bfd_link_relocatable (info)) 8033 rel = next_rel; 8034 else 8035 while (1) 8036 { 8037 if (!dec_dynrel_count (rel->r_info, sec, info, 8038 NULL, h, sym)) 8039 goto error_ret; 8040 8041 if (++rel == next_rel) 8042 break; 8043 8044 r_symndx = ELF64_R_SYM (rel->r_info); 8045 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 8046 r_symndx, ibfd)) 8047 goto error_ret; 8048 } 8049 } 8050 else 8051 { 8052 /* We'll be keeping this opd entry. */ 8053 long adjust; 8054 8055 if (fdh != NULL) 8056 { 8057 /* Redefine the function descriptor symbol to 8058 this location in the opd section. It is 8059 necessary to update the value here rather 8060 than using an array of adjustments as we do 8061 for local symbols, because various places 8062 in the generic ELF code use the value 8063 stored in u.def.value. */ 8064 fdh->elf.root.u.def.value = wptr - new_contents; 8065 fdh->adjust_done = 1; 8066 } 8067 8068 /* Local syms are a bit tricky. We could 8069 tweak them as they can be cached, but 8070 we'd need to look through the local syms 8071 for the function descriptor sym which we 8072 don't have at the moment. So keep an 8073 array of adjustments. */ 8074 adjust = (wptr - new_contents) - (rptr - sec->contents); 8075 opd->adjust[OPD_NDX (rel->r_offset)] = adjust; 8076 8077 if (wptr != rptr) 8078 memcpy (wptr, rptr, opd_ent_size); 8079 wptr += opd_ent_size; 8080 if (add_aux_fields && opd_ent_size == 16) 8081 { 8082 memset (wptr, '\0', 8); 8083 wptr += 8; 8084 } 8085 8086 /* We need to adjust any reloc offsets to point to the 8087 new opd entries. */ 8088 for ( ; rel != next_rel; ++rel) 8089 { 8090 rel->r_offset += adjust; 8091 if (write_rel != rel) 8092 memcpy (write_rel, rel, sizeof (*rel)); 8093 ++write_rel; 8094 } 8095 } 8096 8097 rptr += opd_ent_size; 8098 } 8099 8100 sec->size = wptr - new_contents; 8101 sec->reloc_count = write_rel - relstart; 8102 if (add_aux_fields) 8103 { 8104 free (sec->contents); 8105 sec->contents = new_contents; 8106 } 8107 8108 /* Fudge the header size too, as this is used later in 8109 elf_bfd_final_link if we are emitting relocs. */ 8110 rel_hdr = _bfd_elf_single_rel_hdr (sec); 8111 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize; 8112 some_edited = TRUE; 8113 } 8114 else if (elf_section_data (sec)->relocs != relstart) 8115 free (relstart); 8116 8117 if (local_syms != NULL 8118 && symtab_hdr->contents != (unsigned char *) local_syms) 8119 { 8120 if (!info->keep_memory) 8121 free (local_syms); 8122 else 8123 symtab_hdr->contents = (unsigned char *) local_syms; 8124 } 8125 } 8126 8127 if (some_edited) 8128 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); 8129 8130 /* If we are doing a final link and the last .opd entry is just 16 byte 8131 long, add a 8 byte padding after it. */ 8132 if (need_pad != NULL && !bfd_link_relocatable (info)) 8133 { 8134 bfd_byte *p; 8135 8136 if ((need_pad->flags & SEC_IN_MEMORY) == 0) 8137 { 8138 BFD_ASSERT (need_pad->size > 0); 8139 8140 p = bfd_malloc (need_pad->size + 8); 8141 if (p == NULL) 8142 return FALSE; 8143 8144 if (! bfd_get_section_contents (need_pad->owner, need_pad, 8145 p, 0, need_pad->size)) 8146 return FALSE; 8147 8148 need_pad->contents = p; 8149 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); 8150 } 8151 else 8152 { 8153 p = bfd_realloc (need_pad->contents, need_pad->size + 8); 8154 if (p == NULL) 8155 return FALSE; 8156 8157 need_pad->contents = p; 8158 } 8159 8160 memset (need_pad->contents + need_pad->size, 0, 8); 8161 need_pad->size += 8; 8162 } 8163 8164 return TRUE; 8165} 8166 8167/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ 8168 8169asection * 8170ppc64_elf_tls_setup (struct bfd_link_info *info) 8171{ 8172 struct ppc_link_hash_table *htab; 8173 8174 htab = ppc_hash_table (info); 8175 if (htab == NULL) 8176 return NULL; 8177 8178 if (abiversion (info->output_bfd) == 1) 8179 htab->opd_abi = 1; 8180 8181 if (htab->params->no_multi_toc) 8182 htab->do_multi_toc = 0; 8183 else if (!htab->do_multi_toc) 8184 htab->params->no_multi_toc = 1; 8185 8186 htab->tls_get_addr = ((struct ppc_link_hash_entry *) 8187 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", 8188 FALSE, FALSE, TRUE)); 8189 /* Move dynamic linking info to the function descriptor sym. */ 8190 if (htab->tls_get_addr != NULL) 8191 func_desc_adjust (&htab->tls_get_addr->elf, info); 8192 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *) 8193 elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 8194 FALSE, FALSE, TRUE)); 8195 if (htab->params->tls_get_addr_opt) 8196 { 8197 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd; 8198 8199 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt", 8200 FALSE, FALSE, TRUE); 8201 if (opt != NULL) 8202 func_desc_adjust (opt, info); 8203 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 8204 FALSE, FALSE, TRUE); 8205 if (opt_fd != NULL 8206 && (opt_fd->root.type == bfd_link_hash_defined 8207 || opt_fd->root.type == bfd_link_hash_defweak)) 8208 { 8209 /* If glibc supports an optimized __tls_get_addr call stub, 8210 signalled by the presence of __tls_get_addr_opt, and we'll 8211 be calling __tls_get_addr via a plt call stub, then 8212 make __tls_get_addr point to __tls_get_addr_opt. */ 8213 tga_fd = &htab->tls_get_addr_fd->elf; 8214 if (htab->elf.dynamic_sections_created 8215 && tga_fd != NULL 8216 && (tga_fd->type == STT_FUNC 8217 || tga_fd->needs_plt) 8218 && !(SYMBOL_CALLS_LOCAL (info, tga_fd) 8219 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT 8220 && tga_fd->root.type == bfd_link_hash_undefweak))) 8221 { 8222 struct plt_entry *ent; 8223 8224 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next) 8225 if (ent->plt.refcount > 0) 8226 break; 8227 if (ent != NULL) 8228 { 8229 tga_fd->root.type = bfd_link_hash_indirect; 8230 tga_fd->root.u.i.link = &opt_fd->root; 8231 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd); 8232 opt_fd->forced_local = 0; 8233 if (opt_fd->dynindx != -1) 8234 { 8235 /* Use __tls_get_addr_opt in dynamic relocations. */ 8236 opt_fd->dynindx = -1; 8237 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 8238 opt_fd->dynstr_index); 8239 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd)) 8240 return NULL; 8241 } 8242 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd; 8243 tga = &htab->tls_get_addr->elf; 8244 if (opt != NULL && tga != NULL) 8245 { 8246 tga->root.type = bfd_link_hash_indirect; 8247 tga->root.u.i.link = &opt->root; 8248 ppc64_elf_copy_indirect_symbol (info, opt, tga); 8249 opt->forced_local = 0; 8250 _bfd_elf_link_hash_hide_symbol (info, opt, 8251 tga->forced_local); 8252 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt; 8253 } 8254 htab->tls_get_addr_fd->oh = htab->tls_get_addr; 8255 htab->tls_get_addr_fd->is_func_descriptor = 1; 8256 if (htab->tls_get_addr != NULL) 8257 { 8258 htab->tls_get_addr->oh = htab->tls_get_addr_fd; 8259 htab->tls_get_addr->is_func = 1; 8260 } 8261 } 8262 } 8263 } 8264 else if (htab->params->tls_get_addr_opt < 0) 8265 htab->params->tls_get_addr_opt = 0; 8266 } 8267 return _bfd_elf_tls_setup (info->output_bfd, info); 8268} 8269 8270/* Return TRUE iff REL is a branch reloc with a global symbol matching 8271 HASH1 or HASH2. */ 8272 8273static bfd_boolean 8274branch_reloc_hash_match (const bfd *ibfd, 8275 const Elf_Internal_Rela *rel, 8276 const struct ppc_link_hash_entry *hash1, 8277 const struct ppc_link_hash_entry *hash2) 8278{ 8279 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 8280 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); 8281 unsigned int r_symndx = ELF64_R_SYM (rel->r_info); 8282 8283 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 8284 { 8285 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 8286 struct elf_link_hash_entry *h; 8287 8288 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 8289 h = elf_follow_link (h); 8290 if (h == &hash1->elf || h == &hash2->elf) 8291 return TRUE; 8292 } 8293 return FALSE; 8294} 8295 8296/* Run through all the TLS relocs looking for optimization 8297 opportunities. The linker has been hacked (see ppc64elf.em) to do 8298 a preliminary section layout so that we know the TLS segment 8299 offsets. We can't optimize earlier because some optimizations need 8300 to know the tp offset, and we need to optimize before allocating 8301 dynamic relocations. */ 8302 8303bfd_boolean 8304ppc64_elf_tls_optimize (struct bfd_link_info *info) 8305{ 8306 bfd *ibfd; 8307 asection *sec; 8308 struct ppc_link_hash_table *htab; 8309 unsigned char *toc_ref; 8310 int pass; 8311 8312 if (!bfd_link_executable (info)) 8313 return TRUE; 8314 8315 htab = ppc_hash_table (info); 8316 if (htab == NULL) 8317 return FALSE; 8318 8319 /* Make two passes over the relocs. On the first pass, mark toc 8320 entries involved with tls relocs, and check that tls relocs 8321 involved in setting up a tls_get_addr call are indeed followed by 8322 such a call. If they are not, we can't do any tls optimization. 8323 On the second pass twiddle tls_mask flags to notify 8324 relocate_section that optimization can be done, and adjust got 8325 and plt refcounts. */ 8326 toc_ref = NULL; 8327 for (pass = 0; pass < 2; ++pass) 8328 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 8329 { 8330 Elf_Internal_Sym *locsyms = NULL; 8331 asection *toc = bfd_get_section_by_name (ibfd, ".toc"); 8332 8333 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 8334 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 8335 { 8336 Elf_Internal_Rela *relstart, *rel, *relend; 8337 bfd_boolean found_tls_get_addr_arg = 0; 8338 8339 /* Read the relocations. */ 8340 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 8341 info->keep_memory); 8342 if (relstart == NULL) 8343 { 8344 free (toc_ref); 8345 return FALSE; 8346 } 8347 8348 relend = relstart + sec->reloc_count; 8349 for (rel = relstart; rel < relend; rel++) 8350 { 8351 enum elf_ppc64_reloc_type r_type; 8352 unsigned long r_symndx; 8353 struct elf_link_hash_entry *h; 8354 Elf_Internal_Sym *sym; 8355 asection *sym_sec; 8356 unsigned char *tls_mask; 8357 unsigned char tls_set, tls_clear, tls_type = 0; 8358 bfd_vma value; 8359 bfd_boolean ok_tprel, is_local; 8360 long toc_ref_index = 0; 8361 int expecting_tls_get_addr = 0; 8362 bfd_boolean ret = FALSE; 8363 8364 r_symndx = ELF64_R_SYM (rel->r_info); 8365 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, 8366 r_symndx, ibfd)) 8367 { 8368 err_free_rel: 8369 if (elf_section_data (sec)->relocs != relstart) 8370 free (relstart); 8371 if (toc_ref != NULL) 8372 free (toc_ref); 8373 if (locsyms != NULL 8374 && (elf_symtab_hdr (ibfd).contents 8375 != (unsigned char *) locsyms)) 8376 free (locsyms); 8377 return ret; 8378 } 8379 8380 if (h != NULL) 8381 { 8382 if (h->root.type == bfd_link_hash_defined 8383 || h->root.type == bfd_link_hash_defweak) 8384 value = h->root.u.def.value; 8385 else if (h->root.type == bfd_link_hash_undefweak) 8386 value = 0; 8387 else 8388 { 8389 found_tls_get_addr_arg = 0; 8390 continue; 8391 } 8392 } 8393 else 8394 /* Symbols referenced by TLS relocs must be of type 8395 STT_TLS. So no need for .opd local sym adjust. */ 8396 value = sym->st_value; 8397 8398 ok_tprel = FALSE; 8399 is_local = FALSE; 8400 if (h == NULL 8401 || !h->def_dynamic) 8402 { 8403 is_local = TRUE; 8404 if (h != NULL 8405 && h->root.type == bfd_link_hash_undefweak) 8406 ok_tprel = TRUE; 8407 else if (sym_sec != NULL 8408 && sym_sec->output_section != NULL) 8409 { 8410 value += sym_sec->output_offset; 8411 value += sym_sec->output_section->vma; 8412 value -= htab->elf.tls_sec->vma; 8413 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) 8414 < (bfd_vma) 1 << 32); 8415 } 8416 } 8417 8418 r_type = ELF64_R_TYPE (rel->r_info); 8419 /* If this section has old-style __tls_get_addr calls 8420 without marker relocs, then check that each 8421 __tls_get_addr call reloc is preceded by a reloc 8422 that conceivably belongs to the __tls_get_addr arg 8423 setup insn. If we don't find matching arg setup 8424 relocs, don't do any tls optimization. */ 8425 if (pass == 0 8426 && sec->has_tls_get_addr_call 8427 && h != NULL 8428 && (h == &htab->tls_get_addr->elf 8429 || h == &htab->tls_get_addr_fd->elf) 8430 && !found_tls_get_addr_arg 8431 && is_branch_reloc (r_type)) 8432 { 8433 info->callbacks->minfo (_("%H __tls_get_addr lost arg, " 8434 "TLS optimization disabled\n"), 8435 ibfd, sec, rel->r_offset); 8436 ret = TRUE; 8437 goto err_free_rel; 8438 } 8439 8440 found_tls_get_addr_arg = 0; 8441 switch (r_type) 8442 { 8443 case R_PPC64_GOT_TLSLD16: 8444 case R_PPC64_GOT_TLSLD16_LO: 8445 expecting_tls_get_addr = 1; 8446 found_tls_get_addr_arg = 1; 8447 /* Fall thru */ 8448 8449 case R_PPC64_GOT_TLSLD16_HI: 8450 case R_PPC64_GOT_TLSLD16_HA: 8451 /* These relocs should never be against a symbol 8452 defined in a shared lib. Leave them alone if 8453 that turns out to be the case. */ 8454 if (!is_local) 8455 continue; 8456 8457 /* LD -> LE */ 8458 tls_set = 0; 8459 tls_clear = TLS_LD; 8460 tls_type = TLS_TLS | TLS_LD; 8461 break; 8462 8463 case R_PPC64_GOT_TLSGD16: 8464 case R_PPC64_GOT_TLSGD16_LO: 8465 expecting_tls_get_addr = 1; 8466 found_tls_get_addr_arg = 1; 8467 /* Fall thru */ 8468 8469 case R_PPC64_GOT_TLSGD16_HI: 8470 case R_PPC64_GOT_TLSGD16_HA: 8471 if (ok_tprel) 8472 /* GD -> LE */ 8473 tls_set = 0; 8474 else 8475 /* GD -> IE */ 8476 tls_set = TLS_TLS | TLS_TPRELGD; 8477 tls_clear = TLS_GD; 8478 tls_type = TLS_TLS | TLS_GD; 8479 break; 8480 8481 case R_PPC64_GOT_TPREL16_DS: 8482 case R_PPC64_GOT_TPREL16_LO_DS: 8483 case R_PPC64_GOT_TPREL16_HI: 8484 case R_PPC64_GOT_TPREL16_HA: 8485 if (ok_tprel) 8486 { 8487 /* IE -> LE */ 8488 tls_set = 0; 8489 tls_clear = TLS_TPREL; 8490 tls_type = TLS_TLS | TLS_TPREL; 8491 break; 8492 } 8493 continue; 8494 8495 case R_PPC64_TLSGD: 8496 case R_PPC64_TLSLD: 8497 found_tls_get_addr_arg = 1; 8498 /* Fall thru */ 8499 8500 case R_PPC64_TLS: 8501 case R_PPC64_TOC16: 8502 case R_PPC64_TOC16_LO: 8503 if (sym_sec == NULL || sym_sec != toc) 8504 continue; 8505 8506 /* Mark this toc entry as referenced by a TLS 8507 code sequence. We can do that now in the 8508 case of R_PPC64_TLS, and after checking for 8509 tls_get_addr for the TOC16 relocs. */ 8510 if (toc_ref == NULL) 8511 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8); 8512 if (toc_ref == NULL) 8513 goto err_free_rel; 8514 8515 if (h != NULL) 8516 value = h->root.u.def.value; 8517 else 8518 value = sym->st_value; 8519 value += rel->r_addend; 8520 if (value % 8 != 0) 8521 continue; 8522 BFD_ASSERT (value < toc->size 8523 && toc->output_offset % 8 == 0); 8524 toc_ref_index = (value + toc->output_offset) / 8; 8525 if (r_type == R_PPC64_TLS 8526 || r_type == R_PPC64_TLSGD 8527 || r_type == R_PPC64_TLSLD) 8528 { 8529 toc_ref[toc_ref_index] = 1; 8530 continue; 8531 } 8532 8533 if (pass != 0 && toc_ref[toc_ref_index] == 0) 8534 continue; 8535 8536 tls_set = 0; 8537 tls_clear = 0; 8538 expecting_tls_get_addr = 2; 8539 break; 8540 8541 case R_PPC64_TPREL64: 8542 if (pass == 0 8543 || sec != toc 8544 || toc_ref == NULL 8545 || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) 8546 continue; 8547 if (ok_tprel) 8548 { 8549 /* IE -> LE */ 8550 tls_set = TLS_EXPLICIT; 8551 tls_clear = TLS_TPREL; 8552 break; 8553 } 8554 continue; 8555 8556 case R_PPC64_DTPMOD64: 8557 if (pass == 0 8558 || sec != toc 8559 || toc_ref == NULL 8560 || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) 8561 continue; 8562 if (rel + 1 < relend 8563 && (rel[1].r_info 8564 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) 8565 && rel[1].r_offset == rel->r_offset + 8) 8566 { 8567 if (ok_tprel) 8568 /* GD -> LE */ 8569 tls_set = TLS_EXPLICIT | TLS_GD; 8570 else 8571 /* GD -> IE */ 8572 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; 8573 tls_clear = TLS_GD; 8574 } 8575 else 8576 { 8577 if (!is_local) 8578 continue; 8579 8580 /* LD -> LE */ 8581 tls_set = TLS_EXPLICIT; 8582 tls_clear = TLS_LD; 8583 } 8584 break; 8585 8586 default: 8587 continue; 8588 } 8589 8590 if (pass == 0) 8591 { 8592 if (!expecting_tls_get_addr 8593 || !sec->has_tls_get_addr_call) 8594 continue; 8595 8596 if (rel + 1 < relend 8597 && branch_reloc_hash_match (ibfd, rel + 1, 8598 htab->tls_get_addr, 8599 htab->tls_get_addr_fd)) 8600 { 8601 if (expecting_tls_get_addr == 2) 8602 { 8603 /* Check for toc tls entries. */ 8604 unsigned char *toc_tls; 8605 int retval; 8606 8607 retval = get_tls_mask (&toc_tls, NULL, NULL, 8608 &locsyms, 8609 rel, ibfd); 8610 if (retval == 0) 8611 goto err_free_rel; 8612 if (toc_tls != NULL) 8613 { 8614 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0) 8615 found_tls_get_addr_arg = 1; 8616 if (retval > 1) 8617 toc_ref[toc_ref_index] = 1; 8618 } 8619 } 8620 continue; 8621 } 8622 8623 if (expecting_tls_get_addr != 1) 8624 continue; 8625 8626 /* Uh oh, we didn't find the expected call. We 8627 could just mark this symbol to exclude it 8628 from tls optimization but it's safer to skip 8629 the entire optimization. */ 8630 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 8631 "TLS optimization disabled\n"), 8632 ibfd, sec, rel->r_offset); 8633 ret = TRUE; 8634 goto err_free_rel; 8635 } 8636 8637 if (expecting_tls_get_addr && htab->tls_get_addr != NULL) 8638 { 8639 struct plt_entry *ent; 8640 for (ent = htab->tls_get_addr->elf.plt.plist; 8641 ent != NULL; 8642 ent = ent->next) 8643 if (ent->addend == 0) 8644 { 8645 if (ent->plt.refcount > 0) 8646 { 8647 ent->plt.refcount -= 1; 8648 expecting_tls_get_addr = 0; 8649 } 8650 break; 8651 } 8652 } 8653 8654 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL) 8655 { 8656 struct plt_entry *ent; 8657 for (ent = htab->tls_get_addr_fd->elf.plt.plist; 8658 ent != NULL; 8659 ent = ent->next) 8660 if (ent->addend == 0) 8661 { 8662 if (ent->plt.refcount > 0) 8663 ent->plt.refcount -= 1; 8664 break; 8665 } 8666 } 8667 8668 if (tls_clear == 0) 8669 continue; 8670 8671 if ((tls_set & TLS_EXPLICIT) == 0) 8672 { 8673 struct got_entry *ent; 8674 8675 /* Adjust got entry for this reloc. */ 8676 if (h != NULL) 8677 ent = h->got.glist; 8678 else 8679 ent = elf_local_got_ents (ibfd)[r_symndx]; 8680 8681 for (; ent != NULL; ent = ent->next) 8682 if (ent->addend == rel->r_addend 8683 && ent->owner == ibfd 8684 && ent->tls_type == tls_type) 8685 break; 8686 if (ent == NULL) 8687 abort (); 8688 8689 if (tls_set == 0) 8690 { 8691 /* We managed to get rid of a got entry. */ 8692 if (ent->got.refcount > 0) 8693 ent->got.refcount -= 1; 8694 } 8695 } 8696 else 8697 { 8698 /* If we got rid of a DTPMOD/DTPREL reloc pair then 8699 we'll lose one or two dyn relocs. */ 8700 if (!dec_dynrel_count (rel->r_info, sec, info, 8701 NULL, h, sym)) 8702 return FALSE; 8703 8704 if (tls_set == (TLS_EXPLICIT | TLS_GD)) 8705 { 8706 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info, 8707 NULL, h, sym)) 8708 return FALSE; 8709 } 8710 } 8711 8712 *tls_mask |= tls_set; 8713 *tls_mask &= ~tls_clear; 8714 } 8715 8716 if (elf_section_data (sec)->relocs != relstart) 8717 free (relstart); 8718 } 8719 8720 if (locsyms != NULL 8721 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms)) 8722 { 8723 if (!info->keep_memory) 8724 free (locsyms); 8725 else 8726 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms; 8727 } 8728 } 8729 8730 if (toc_ref != NULL) 8731 free (toc_ref); 8732 return TRUE; 8733} 8734 8735/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust 8736 the values of any global symbols in a toc section that has been 8737 edited. Globals in toc sections should be a rarity, so this function 8738 sets a flag if any are found in toc sections other than the one just 8739 edited, so that futher hash table traversals can be avoided. */ 8740 8741struct adjust_toc_info 8742{ 8743 asection *toc; 8744 unsigned long *skip; 8745 bfd_boolean global_toc_syms; 8746}; 8747 8748enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 }; 8749 8750static bfd_boolean 8751adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) 8752{ 8753 struct ppc_link_hash_entry *eh; 8754 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; 8755 unsigned long i; 8756 8757 if (h->root.type != bfd_link_hash_defined 8758 && h->root.type != bfd_link_hash_defweak) 8759 return TRUE; 8760 8761 eh = (struct ppc_link_hash_entry *) h; 8762 if (eh->adjust_done) 8763 return TRUE; 8764 8765 if (eh->elf.root.u.def.section == toc_inf->toc) 8766 { 8767 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize) 8768 i = toc_inf->toc->rawsize >> 3; 8769 else 8770 i = eh->elf.root.u.def.value >> 3; 8771 8772 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0) 8773 { 8774 (*_bfd_error_handler) 8775 (_("%s defined on removed toc entry"), eh->elf.root.root.string); 8776 do 8777 ++i; 8778 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0); 8779 eh->elf.root.u.def.value = (bfd_vma) i << 3; 8780 } 8781 8782 eh->elf.root.u.def.value -= toc_inf->skip[i]; 8783 eh->adjust_done = 1; 8784 } 8785 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) 8786 toc_inf->global_toc_syms = TRUE; 8787 8788 return TRUE; 8789} 8790 8791/* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */ 8792 8793static bfd_boolean 8794ok_lo_toc_insn (unsigned int insn) 8795{ 8796 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 8797 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 8798 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 8799 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 8800 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 8801 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 8802 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 8803 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 8804 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 8805 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 8806 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 8807 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 8808 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 8809 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 8810 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 8811 && (insn & 3) != 1) 8812 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 8813 && ((insn & 3) == 0 || (insn & 3) == 3)) 8814 || (insn & (0x3f << 26)) == 12u << 26 /* addic */); 8815} 8816 8817/* Examine all relocs referencing .toc sections in order to remove 8818 unused .toc entries. */ 8819 8820bfd_boolean 8821ppc64_elf_edit_toc (struct bfd_link_info *info) 8822{ 8823 bfd *ibfd; 8824 struct adjust_toc_info toc_inf; 8825 struct ppc_link_hash_table *htab = ppc_hash_table (info); 8826 8827 htab->do_toc_opt = 1; 8828 toc_inf.global_toc_syms = TRUE; 8829 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 8830 { 8831 asection *toc, *sec; 8832 Elf_Internal_Shdr *symtab_hdr; 8833 Elf_Internal_Sym *local_syms; 8834 Elf_Internal_Rela *relstart, *rel, *toc_relocs; 8835 unsigned long *skip, *drop; 8836 unsigned char *used; 8837 unsigned char *keep, last, some_unused; 8838 8839 if (!is_ppc64_elf (ibfd)) 8840 continue; 8841 8842 toc = bfd_get_section_by_name (ibfd, ".toc"); 8843 if (toc == NULL 8844 || toc->size == 0 8845 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS 8846 || discarded_section (toc)) 8847 continue; 8848 8849 toc_relocs = NULL; 8850 local_syms = NULL; 8851 symtab_hdr = &elf_symtab_hdr (ibfd); 8852 8853 /* Look at sections dropped from the final link. */ 8854 skip = NULL; 8855 relstart = NULL; 8856 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 8857 { 8858 if (sec->reloc_count == 0 8859 || !discarded_section (sec) 8860 || get_opd_info (sec) 8861 || (sec->flags & SEC_ALLOC) == 0 8862 || (sec->flags & SEC_DEBUGGING) != 0) 8863 continue; 8864 8865 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE); 8866 if (relstart == NULL) 8867 goto error_ret; 8868 8869 /* Run through the relocs to see which toc entries might be 8870 unused. */ 8871 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) 8872 { 8873 enum elf_ppc64_reloc_type r_type; 8874 unsigned long r_symndx; 8875 asection *sym_sec; 8876 struct elf_link_hash_entry *h; 8877 Elf_Internal_Sym *sym; 8878 bfd_vma val; 8879 8880 r_type = ELF64_R_TYPE (rel->r_info); 8881 switch (r_type) 8882 { 8883 default: 8884 continue; 8885 8886 case R_PPC64_TOC16: 8887 case R_PPC64_TOC16_LO: 8888 case R_PPC64_TOC16_HI: 8889 case R_PPC64_TOC16_HA: 8890 case R_PPC64_TOC16_DS: 8891 case R_PPC64_TOC16_LO_DS: 8892 break; 8893 } 8894 8895 r_symndx = ELF64_R_SYM (rel->r_info); 8896 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 8897 r_symndx, ibfd)) 8898 goto error_ret; 8899 8900 if (sym_sec != toc) 8901 continue; 8902 8903 if (h != NULL) 8904 val = h->root.u.def.value; 8905 else 8906 val = sym->st_value; 8907 val += rel->r_addend; 8908 8909 if (val >= toc->size) 8910 continue; 8911 8912 /* Anything in the toc ought to be aligned to 8 bytes. 8913 If not, don't mark as unused. */ 8914 if (val & 7) 8915 continue; 8916 8917 if (skip == NULL) 8918 { 8919 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); 8920 if (skip == NULL) 8921 goto error_ret; 8922 } 8923 8924 skip[val >> 3] = ref_from_discarded; 8925 } 8926 8927 if (elf_section_data (sec)->relocs != relstart) 8928 free (relstart); 8929 } 8930 8931 /* For largetoc loads of address constants, we can convert 8932 . addis rx,2,addr@got@ha 8933 . ld ry,addr@got@l(rx) 8934 to 8935 . addis rx,2,addr@toc@ha 8936 . addi ry,rx,addr@toc@l 8937 when addr is within 2G of the toc pointer. This then means 8938 that the word storing "addr" in the toc is no longer needed. */ 8939 8940 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc 8941 && toc->output_section->rawsize < (bfd_vma) 1 << 31 8942 && toc->reloc_count != 0) 8943 { 8944 /* Read toc relocs. */ 8945 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, 8946 info->keep_memory); 8947 if (toc_relocs == NULL) 8948 goto error_ret; 8949 8950 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) 8951 { 8952 enum elf_ppc64_reloc_type r_type; 8953 unsigned long r_symndx; 8954 asection *sym_sec; 8955 struct elf_link_hash_entry *h; 8956 Elf_Internal_Sym *sym; 8957 bfd_vma val, addr; 8958 8959 r_type = ELF64_R_TYPE (rel->r_info); 8960 if (r_type != R_PPC64_ADDR64) 8961 continue; 8962 8963 r_symndx = ELF64_R_SYM (rel->r_info); 8964 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 8965 r_symndx, ibfd)) 8966 goto error_ret; 8967 8968 if (sym_sec == NULL 8969 || sym_sec->output_section == NULL 8970 || discarded_section (sym_sec)) 8971 continue; 8972 8973 if (!SYMBOL_REFERENCES_LOCAL (info, h)) 8974 continue; 8975 8976 if (h != NULL) 8977 { 8978 if (h->type == STT_GNU_IFUNC) 8979 continue; 8980 val = h->root.u.def.value; 8981 } 8982 else 8983 { 8984 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 8985 continue; 8986 val = sym->st_value; 8987 } 8988 val += rel->r_addend; 8989 val += sym_sec->output_section->vma + sym_sec->output_offset; 8990 8991 /* We don't yet know the exact toc pointer value, but we 8992 know it will be somewhere in the toc section. Don't 8993 optimize if the difference from any possible toc 8994 pointer is outside [ff..f80008000, 7fff7fff]. */ 8995 addr = toc->output_section->vma + TOC_BASE_OFF; 8996 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) 8997 continue; 8998 8999 addr = toc->output_section->vma + toc->output_section->rawsize; 9000 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) 9001 continue; 9002 9003 if (skip == NULL) 9004 { 9005 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); 9006 if (skip == NULL) 9007 goto error_ret; 9008 } 9009 9010 skip[rel->r_offset >> 3] 9011 |= can_optimize | ((rel - toc_relocs) << 2); 9012 } 9013 } 9014 9015 if (skip == NULL) 9016 continue; 9017 9018 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); 9019 if (used == NULL) 9020 { 9021 error_ret: 9022 if (local_syms != NULL 9023 && symtab_hdr->contents != (unsigned char *) local_syms) 9024 free (local_syms); 9025 if (sec != NULL 9026 && relstart != NULL 9027 && elf_section_data (sec)->relocs != relstart) 9028 free (relstart); 9029 if (toc_relocs != NULL 9030 && elf_section_data (toc)->relocs != toc_relocs) 9031 free (toc_relocs); 9032 if (skip != NULL) 9033 free (skip); 9034 return FALSE; 9035 } 9036 9037 /* Now check all kept sections that might reference the toc. 9038 Check the toc itself last. */ 9039 for (sec = (ibfd->sections == toc && toc->next ? toc->next 9040 : ibfd->sections); 9041 sec != NULL; 9042 sec = (sec == toc ? NULL 9043 : sec->next == NULL ? toc 9044 : sec->next == toc && toc->next ? toc->next 9045 : sec->next)) 9046 { 9047 int repeat; 9048 9049 if (sec->reloc_count == 0 9050 || discarded_section (sec) 9051 || get_opd_info (sec) 9052 || (sec->flags & SEC_ALLOC) == 0 9053 || (sec->flags & SEC_DEBUGGING) != 0) 9054 continue; 9055 9056 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 9057 info->keep_memory); 9058 if (relstart == NULL) 9059 { 9060 free (used); 9061 goto error_ret; 9062 } 9063 9064 /* Mark toc entries referenced as used. */ 9065 do 9066 { 9067 repeat = 0; 9068 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) 9069 { 9070 enum elf_ppc64_reloc_type r_type; 9071 unsigned long r_symndx; 9072 asection *sym_sec; 9073 struct elf_link_hash_entry *h; 9074 Elf_Internal_Sym *sym; 9075 bfd_vma val; 9076 enum {no_check, check_lo, check_ha} insn_check; 9077 9078 r_type = ELF64_R_TYPE (rel->r_info); 9079 switch (r_type) 9080 { 9081 default: 9082 insn_check = no_check; 9083 break; 9084 9085 case R_PPC64_GOT_TLSLD16_HA: 9086 case R_PPC64_GOT_TLSGD16_HA: 9087 case R_PPC64_GOT_TPREL16_HA: 9088 case R_PPC64_GOT_DTPREL16_HA: 9089 case R_PPC64_GOT16_HA: 9090 case R_PPC64_TOC16_HA: 9091 insn_check = check_ha; 9092 break; 9093 9094 case R_PPC64_GOT_TLSLD16_LO: 9095 case R_PPC64_GOT_TLSGD16_LO: 9096 case R_PPC64_GOT_TPREL16_LO_DS: 9097 case R_PPC64_GOT_DTPREL16_LO_DS: 9098 case R_PPC64_GOT16_LO: 9099 case R_PPC64_GOT16_LO_DS: 9100 case R_PPC64_TOC16_LO: 9101 case R_PPC64_TOC16_LO_DS: 9102 insn_check = check_lo; 9103 break; 9104 } 9105 9106 if (insn_check != no_check) 9107 { 9108 bfd_vma off = rel->r_offset & ~3; 9109 unsigned char buf[4]; 9110 unsigned int insn; 9111 9112 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4)) 9113 { 9114 free (used); 9115 goto error_ret; 9116 } 9117 insn = bfd_get_32 (ibfd, buf); 9118 if (insn_check == check_lo 9119 ? !ok_lo_toc_insn (insn) 9120 : ((insn & ((0x3f << 26) | 0x1f << 16)) 9121 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) 9122 { 9123 char str[12]; 9124 9125 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1; 9126 sprintf (str, "%#08x", insn); 9127 info->callbacks->einfo 9128 (_("%P: %H: toc optimization is not supported for" 9129 " %s instruction.\n"), 9130 ibfd, sec, rel->r_offset & ~3, str); 9131 } 9132 } 9133 9134 switch (r_type) 9135 { 9136 case R_PPC64_TOC16: 9137 case R_PPC64_TOC16_LO: 9138 case R_PPC64_TOC16_HI: 9139 case R_PPC64_TOC16_HA: 9140 case R_PPC64_TOC16_DS: 9141 case R_PPC64_TOC16_LO_DS: 9142 /* In case we're taking addresses of toc entries. */ 9143 case R_PPC64_ADDR64: 9144 break; 9145 9146 default: 9147 continue; 9148 } 9149 9150 r_symndx = ELF64_R_SYM (rel->r_info); 9151 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 9152 r_symndx, ibfd)) 9153 { 9154 free (used); 9155 goto error_ret; 9156 } 9157 9158 if (sym_sec != toc) 9159 continue; 9160 9161 if (h != NULL) 9162 val = h->root.u.def.value; 9163 else 9164 val = sym->st_value; 9165 val += rel->r_addend; 9166 9167 if (val >= toc->size) 9168 continue; 9169 9170 if ((skip[val >> 3] & can_optimize) != 0) 9171 { 9172 bfd_vma off; 9173 unsigned char opc; 9174 9175 switch (r_type) 9176 { 9177 case R_PPC64_TOC16_HA: 9178 break; 9179 9180 case R_PPC64_TOC16_LO_DS: 9181 off = rel->r_offset; 9182 off += (bfd_big_endian (ibfd) ? -2 : 3); 9183 if (!bfd_get_section_contents (ibfd, sec, &opc, 9184 off, 1)) 9185 { 9186 free (used); 9187 goto error_ret; 9188 } 9189 if ((opc & (0x3f << 2)) == (58u << 2)) 9190 break; 9191 /* Fall thru */ 9192 9193 default: 9194 /* Wrong sort of reloc, or not a ld. We may 9195 as well clear ref_from_discarded too. */ 9196 skip[val >> 3] = 0; 9197 } 9198 } 9199 9200 if (sec != toc) 9201 used[val >> 3] = 1; 9202 /* For the toc section, we only mark as used if this 9203 entry itself isn't unused. */ 9204 else if ((used[rel->r_offset >> 3] 9205 || !(skip[rel->r_offset >> 3] & ref_from_discarded)) 9206 && !used[val >> 3]) 9207 { 9208 /* Do all the relocs again, to catch reference 9209 chains. */ 9210 repeat = 1; 9211 used[val >> 3] = 1; 9212 } 9213 } 9214 } 9215 while (repeat); 9216 9217 if (elf_section_data (sec)->relocs != relstart) 9218 free (relstart); 9219 } 9220 9221 /* Merge the used and skip arrays. Assume that TOC 9222 doublewords not appearing as either used or unused belong 9223 to to an entry more than one doubleword in size. */ 9224 for (drop = skip, keep = used, last = 0, some_unused = 0; 9225 drop < skip + (toc->size + 7) / 8; 9226 ++drop, ++keep) 9227 { 9228 if (*keep) 9229 { 9230 *drop &= ~ref_from_discarded; 9231 if ((*drop & can_optimize) != 0) 9232 some_unused = 1; 9233 last = 0; 9234 } 9235 else if ((*drop & ref_from_discarded) != 0) 9236 { 9237 some_unused = 1; 9238 last = ref_from_discarded; 9239 } 9240 else 9241 *drop = last; 9242 } 9243 9244 free (used); 9245 9246 if (some_unused) 9247 { 9248 bfd_byte *contents, *src; 9249 unsigned long off; 9250 Elf_Internal_Sym *sym; 9251 bfd_boolean local_toc_syms = FALSE; 9252 9253 /* Shuffle the toc contents, and at the same time convert the 9254 skip array from booleans into offsets. */ 9255 if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) 9256 goto error_ret; 9257 9258 elf_section_data (toc)->this_hdr.contents = contents; 9259 9260 for (src = contents, off = 0, drop = skip; 9261 src < contents + toc->size; 9262 src += 8, ++drop) 9263 { 9264 if ((*drop & (can_optimize | ref_from_discarded)) != 0) 9265 off += 8; 9266 else if (off != 0) 9267 { 9268 *drop = off; 9269 memcpy (src - off, src, 8); 9270 } 9271 } 9272 *drop = off; 9273 toc->rawsize = toc->size; 9274 toc->size = src - contents - off; 9275 9276 /* Adjust addends for relocs against the toc section sym, 9277 and optimize any accesses we can. */ 9278 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 9279 { 9280 if (sec->reloc_count == 0 9281 || discarded_section (sec)) 9282 continue; 9283 9284 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 9285 info->keep_memory); 9286 if (relstart == NULL) 9287 goto error_ret; 9288 9289 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) 9290 { 9291 enum elf_ppc64_reloc_type r_type; 9292 unsigned long r_symndx; 9293 asection *sym_sec; 9294 struct elf_link_hash_entry *h; 9295 bfd_vma val; 9296 9297 r_type = ELF64_R_TYPE (rel->r_info); 9298 switch (r_type) 9299 { 9300 default: 9301 continue; 9302 9303 case R_PPC64_TOC16: 9304 case R_PPC64_TOC16_LO: 9305 case R_PPC64_TOC16_HI: 9306 case R_PPC64_TOC16_HA: 9307 case R_PPC64_TOC16_DS: 9308 case R_PPC64_TOC16_LO_DS: 9309 case R_PPC64_ADDR64: 9310 break; 9311 } 9312 9313 r_symndx = ELF64_R_SYM (rel->r_info); 9314 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 9315 r_symndx, ibfd)) 9316 goto error_ret; 9317 9318 if (sym_sec != toc) 9319 continue; 9320 9321 if (h != NULL) 9322 val = h->root.u.def.value; 9323 else 9324 { 9325 val = sym->st_value; 9326 if (val != 0) 9327 local_toc_syms = TRUE; 9328 } 9329 9330 val += rel->r_addend; 9331 9332 if (val > toc->rawsize) 9333 val = toc->rawsize; 9334 else if ((skip[val >> 3] & ref_from_discarded) != 0) 9335 continue; 9336 else if ((skip[val >> 3] & can_optimize) != 0) 9337 { 9338 Elf_Internal_Rela *tocrel 9339 = toc_relocs + (skip[val >> 3] >> 2); 9340 unsigned long tsym = ELF64_R_SYM (tocrel->r_info); 9341 9342 switch (r_type) 9343 { 9344 case R_PPC64_TOC16_HA: 9345 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA); 9346 break; 9347 9348 case R_PPC64_TOC16_LO_DS: 9349 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT); 9350 break; 9351 9352 default: 9353 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 9354 ppc_howto_init (); 9355 info->callbacks->einfo 9356 (_("%P: %H: %s references " 9357 "optimized away TOC entry\n"), 9358 ibfd, sec, rel->r_offset, 9359 ppc64_elf_howto_table[r_type]->name); 9360 bfd_set_error (bfd_error_bad_value); 9361 goto error_ret; 9362 } 9363 rel->r_addend = tocrel->r_addend; 9364 elf_section_data (sec)->relocs = relstart; 9365 continue; 9366 } 9367 9368 if (h != NULL || sym->st_value != 0) 9369 continue; 9370 9371 rel->r_addend -= skip[val >> 3]; 9372 elf_section_data (sec)->relocs = relstart; 9373 } 9374 9375 if (elf_section_data (sec)->relocs != relstart) 9376 free (relstart); 9377 } 9378 9379 /* We shouldn't have local or global symbols defined in the TOC, 9380 but handle them anyway. */ 9381 if (local_syms != NULL) 9382 for (sym = local_syms; 9383 sym < local_syms + symtab_hdr->sh_info; 9384 ++sym) 9385 if (sym->st_value != 0 9386 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) 9387 { 9388 unsigned long i; 9389 9390 if (sym->st_value > toc->rawsize) 9391 i = toc->rawsize >> 3; 9392 else 9393 i = sym->st_value >> 3; 9394 9395 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0) 9396 { 9397 if (local_toc_syms) 9398 (*_bfd_error_handler) 9399 (_("%s defined on removed toc entry"), 9400 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL)); 9401 do 9402 ++i; 9403 while ((skip[i] & (ref_from_discarded | can_optimize))); 9404 sym->st_value = (bfd_vma) i << 3; 9405 } 9406 9407 sym->st_value -= skip[i]; 9408 symtab_hdr->contents = (unsigned char *) local_syms; 9409 } 9410 9411 /* Adjust any global syms defined in this toc input section. */ 9412 if (toc_inf.global_toc_syms) 9413 { 9414 toc_inf.toc = toc; 9415 toc_inf.skip = skip; 9416 toc_inf.global_toc_syms = FALSE; 9417 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, 9418 &toc_inf); 9419 } 9420 9421 if (toc->reloc_count != 0) 9422 { 9423 Elf_Internal_Shdr *rel_hdr; 9424 Elf_Internal_Rela *wrel; 9425 bfd_size_type sz; 9426 9427 /* Remove unused toc relocs, and adjust those we keep. */ 9428 if (toc_relocs == NULL) 9429 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, 9430 info->keep_memory); 9431 if (toc_relocs == NULL) 9432 goto error_ret; 9433 9434 wrel = toc_relocs; 9435 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) 9436 if ((skip[rel->r_offset >> 3] 9437 & (ref_from_discarded | can_optimize)) == 0) 9438 { 9439 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; 9440 wrel->r_info = rel->r_info; 9441 wrel->r_addend = rel->r_addend; 9442 ++wrel; 9443 } 9444 else if (!dec_dynrel_count (rel->r_info, toc, info, 9445 &local_syms, NULL, NULL)) 9446 goto error_ret; 9447 9448 elf_section_data (toc)->relocs = toc_relocs; 9449 toc->reloc_count = wrel - toc_relocs; 9450 rel_hdr = _bfd_elf_single_rel_hdr (toc); 9451 sz = rel_hdr->sh_entsize; 9452 rel_hdr->sh_size = toc->reloc_count * sz; 9453 } 9454 } 9455 else if (toc_relocs != NULL 9456 && elf_section_data (toc)->relocs != toc_relocs) 9457 free (toc_relocs); 9458 9459 if (local_syms != NULL 9460 && symtab_hdr->contents != (unsigned char *) local_syms) 9461 { 9462 if (!info->keep_memory) 9463 free (local_syms); 9464 else 9465 symtab_hdr->contents = (unsigned char *) local_syms; 9466 } 9467 free (skip); 9468 } 9469 9470 return TRUE; 9471} 9472 9473/* Return true iff input section I references the TOC using 9474 instructions limited to +/-32k offsets. */ 9475 9476bfd_boolean 9477ppc64_elf_has_small_toc_reloc (asection *i) 9478{ 9479 return (is_ppc64_elf (i->owner) 9480 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc); 9481} 9482 9483/* Allocate space for one GOT entry. */ 9484 9485static void 9486allocate_got (struct elf_link_hash_entry *h, 9487 struct bfd_link_info *info, 9488 struct got_entry *gent) 9489{ 9490 struct ppc_link_hash_table *htab = ppc_hash_table (info); 9491 bfd_boolean dyn; 9492 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h; 9493 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD) 9494 ? 16 : 8); 9495 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD 9496 ? 2 : 1) * sizeof (Elf64_External_Rela); 9497 asection *got = ppc64_elf_tdata (gent->owner)->got; 9498 9499 gent->got.offset = got->size; 9500 got->size += entsize; 9501 9502 dyn = htab->elf.dynamic_sections_created; 9503 if (h->type == STT_GNU_IFUNC) 9504 { 9505 htab->elf.irelplt->size += rentsize; 9506 htab->got_reli_size += rentsize; 9507 } 9508 else if ((bfd_link_pic (info) 9509 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 9510 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 9511 || h->root.type != bfd_link_hash_undefweak)) 9512 { 9513 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot; 9514 relgot->size += rentsize; 9515 } 9516} 9517 9518/* This function merges got entries in the same toc group. */ 9519 9520static void 9521merge_got_entries (struct got_entry **pent) 9522{ 9523 struct got_entry *ent, *ent2; 9524 9525 for (ent = *pent; ent != NULL; ent = ent->next) 9526 if (!ent->is_indirect) 9527 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next) 9528 if (!ent2->is_indirect 9529 && ent2->addend == ent->addend 9530 && ent2->tls_type == ent->tls_type 9531 && elf_gp (ent2->owner) == elf_gp (ent->owner)) 9532 { 9533 ent2->is_indirect = TRUE; 9534 ent2->got.ent = ent; 9535 } 9536} 9537 9538/* Allocate space in .plt, .got and associated reloc sections for 9539 dynamic relocs. */ 9540 9541static bfd_boolean 9542allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 9543{ 9544 struct bfd_link_info *info; 9545 struct ppc_link_hash_table *htab; 9546 asection *s; 9547 struct ppc_link_hash_entry *eh; 9548 struct elf_dyn_relocs *p; 9549 struct got_entry **pgent, *gent; 9550 9551 if (h->root.type == bfd_link_hash_indirect) 9552 return TRUE; 9553 9554 info = (struct bfd_link_info *) inf; 9555 htab = ppc_hash_table (info); 9556 if (htab == NULL) 9557 return FALSE; 9558 9559 eh = (struct ppc_link_hash_entry *) h; 9560 /* Run through the TLS GD got entries first if we're changing them 9561 to TPREL. */ 9562 if ((eh->tls_mask & TLS_TPRELGD) != 0) 9563 for (gent = h->got.glist; gent != NULL; gent = gent->next) 9564 if (gent->got.refcount > 0 9565 && (gent->tls_type & TLS_GD) != 0) 9566 { 9567 /* This was a GD entry that has been converted to TPREL. If 9568 there happens to be a TPREL entry we can use that one. */ 9569 struct got_entry *ent; 9570 for (ent = h->got.glist; ent != NULL; ent = ent->next) 9571 if (ent->got.refcount > 0 9572 && (ent->tls_type & TLS_TPREL) != 0 9573 && ent->addend == gent->addend 9574 && ent->owner == gent->owner) 9575 { 9576 gent->got.refcount = 0; 9577 break; 9578 } 9579 9580 /* If not, then we'll be using our own TPREL entry. */ 9581 if (gent->got.refcount != 0) 9582 gent->tls_type = TLS_TLS | TLS_TPREL; 9583 } 9584 9585 /* Remove any list entry that won't generate a word in the GOT before 9586 we call merge_got_entries. Otherwise we risk merging to empty 9587 entries. */ 9588 pgent = &h->got.glist; 9589 while ((gent = *pgent) != NULL) 9590 if (gent->got.refcount > 0) 9591 { 9592 if ((gent->tls_type & TLS_LD) != 0 9593 && !h->def_dynamic) 9594 { 9595 ppc64_tlsld_got (gent->owner)->got.refcount += 1; 9596 *pgent = gent->next; 9597 } 9598 else 9599 pgent = &gent->next; 9600 } 9601 else 9602 *pgent = gent->next; 9603 9604 if (!htab->do_multi_toc) 9605 merge_got_entries (&h->got.glist); 9606 9607 for (gent = h->got.glist; gent != NULL; gent = gent->next) 9608 if (!gent->is_indirect) 9609 { 9610 /* Make sure this symbol is output as a dynamic symbol. 9611 Undefined weak syms won't yet be marked as dynamic, 9612 nor will all TLS symbols. */ 9613 if (h->dynindx == -1 9614 && !h->forced_local 9615 && h->type != STT_GNU_IFUNC 9616 && htab->elf.dynamic_sections_created) 9617 { 9618 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 9619 return FALSE; 9620 } 9621 9622 if (!is_ppc64_elf (gent->owner)) 9623 abort (); 9624 9625 allocate_got (h, info, gent); 9626 } 9627 9628 if (eh->dyn_relocs != NULL 9629 && (htab->elf.dynamic_sections_created 9630 || h->type == STT_GNU_IFUNC)) 9631 { 9632 /* In the shared -Bsymbolic case, discard space allocated for 9633 dynamic pc-relative relocs against symbols which turn out to 9634 be defined in regular objects. For the normal shared case, 9635 discard space for relocs that have become local due to symbol 9636 visibility changes. */ 9637 9638 if (bfd_link_pic (info)) 9639 { 9640 /* Relocs that use pc_count are those that appear on a call 9641 insn, or certain REL relocs (see must_be_dyn_reloc) that 9642 can be generated via assembly. We want calls to 9643 protected symbols to resolve directly to the function 9644 rather than going via the plt. If people want function 9645 pointer comparisons to work as expected then they should 9646 avoid writing weird assembly. */ 9647 if (SYMBOL_CALLS_LOCAL (info, h)) 9648 { 9649 struct elf_dyn_relocs **pp; 9650 9651 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 9652 { 9653 p->count -= p->pc_count; 9654 p->pc_count = 0; 9655 if (p->count == 0) 9656 *pp = p->next; 9657 else 9658 pp = &p->next; 9659 } 9660 } 9661 9662 /* Also discard relocs on undefined weak syms with 9663 non-default visibility. */ 9664 if (eh->dyn_relocs != NULL 9665 && h->root.type == bfd_link_hash_undefweak) 9666 { 9667 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 9668 eh->dyn_relocs = NULL; 9669 9670 /* Make sure this symbol is output as a dynamic symbol. 9671 Undefined weak syms won't yet be marked as dynamic. */ 9672 else if (h->dynindx == -1 9673 && !h->forced_local) 9674 { 9675 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 9676 return FALSE; 9677 } 9678 } 9679 } 9680 else if (h->type == STT_GNU_IFUNC) 9681 { 9682 if (!h->non_got_ref) 9683 eh->dyn_relocs = NULL; 9684 } 9685 else if (ELIMINATE_COPY_RELOCS) 9686 { 9687 /* For the non-shared case, discard space for relocs against 9688 symbols which turn out to need copy relocs or are not 9689 dynamic. */ 9690 9691 if (!h->non_got_ref 9692 && !h->def_regular) 9693 { 9694 /* Make sure this symbol is output as a dynamic symbol. 9695 Undefined weak syms won't yet be marked as dynamic. */ 9696 if (h->dynindx == -1 9697 && !h->forced_local) 9698 { 9699 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 9700 return FALSE; 9701 } 9702 9703 /* If that succeeded, we know we'll be keeping all the 9704 relocs. */ 9705 if (h->dynindx != -1) 9706 goto keep; 9707 } 9708 9709 eh->dyn_relocs = NULL; 9710 9711 keep: ; 9712 } 9713 9714 /* Finally, allocate space. */ 9715 for (p = eh->dyn_relocs; p != NULL; p = p->next) 9716 { 9717 asection *sreloc = elf_section_data (p->sec)->sreloc; 9718 if (eh->elf.type == STT_GNU_IFUNC) 9719 sreloc = htab->elf.irelplt; 9720 sreloc->size += p->count * sizeof (Elf64_External_Rela); 9721 } 9722 } 9723 9724 if ((htab->elf.dynamic_sections_created 9725 && h->dynindx != -1 9726 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 9727 || h->type == STT_GNU_IFUNC) 9728 { 9729 struct plt_entry *pent; 9730 bfd_boolean doneone = FALSE; 9731 for (pent = h->plt.plist; pent != NULL; pent = pent->next) 9732 if (pent->plt.refcount > 0) 9733 { 9734 if (!htab->elf.dynamic_sections_created 9735 || h->dynindx == -1) 9736 { 9737 s = htab->elf.iplt; 9738 pent->plt.offset = s->size; 9739 s->size += PLT_ENTRY_SIZE (htab); 9740 s = htab->elf.irelplt; 9741 } 9742 else 9743 { 9744 /* If this is the first .plt entry, make room for the special 9745 first entry. */ 9746 s = htab->elf.splt; 9747 if (s->size == 0) 9748 s->size += PLT_INITIAL_ENTRY_SIZE (htab); 9749 9750 pent->plt.offset = s->size; 9751 9752 /* Make room for this entry. */ 9753 s->size += PLT_ENTRY_SIZE (htab); 9754 9755 /* Make room for the .glink code. */ 9756 s = htab->glink; 9757 if (s->size == 0) 9758 s->size += GLINK_CALL_STUB_SIZE; 9759 if (htab->opd_abi) 9760 { 9761 /* We need bigger stubs past index 32767. */ 9762 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4) 9763 s->size += 4; 9764 s->size += 2*4; 9765 } 9766 else 9767 s->size += 4; 9768 9769 /* We also need to make an entry in the .rela.plt section. */ 9770 s = htab->elf.srelplt; 9771 } 9772 s->size += sizeof (Elf64_External_Rela); 9773 doneone = TRUE; 9774 } 9775 else 9776 pent->plt.offset = (bfd_vma) -1; 9777 if (!doneone) 9778 { 9779 h->plt.plist = NULL; 9780 h->needs_plt = 0; 9781 } 9782 } 9783 else 9784 { 9785 h->plt.plist = NULL; 9786 h->needs_plt = 0; 9787 } 9788 9789 return TRUE; 9790} 9791 9792/* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections 9793 to set up space for global entry stubs. These are put in glink, 9794 after the branch table. */ 9795 9796static bfd_boolean 9797size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf) 9798{ 9799 struct bfd_link_info *info; 9800 struct ppc_link_hash_table *htab; 9801 struct plt_entry *pent; 9802 asection *s; 9803 9804 if (h->root.type == bfd_link_hash_indirect) 9805 return TRUE; 9806 9807 if (!h->pointer_equality_needed) 9808 return TRUE; 9809 9810 if (h->def_regular) 9811 return TRUE; 9812 9813 info = inf; 9814 htab = ppc_hash_table (info); 9815 if (htab == NULL) 9816 return FALSE; 9817 9818 s = htab->glink; 9819 for (pent = h->plt.plist; pent != NULL; pent = pent->next) 9820 if (pent->plt.offset != (bfd_vma) -1 9821 && pent->addend == 0) 9822 { 9823 /* For ELFv2, if this symbol is not defined in a regular file 9824 and we are not generating a shared library or pie, then we 9825 need to define the symbol in the executable on a call stub. 9826 This is to avoid text relocations. */ 9827 s->size = (s->size + 15) & -16; 9828 h->root.u.def.section = s; 9829 h->root.u.def.value = s->size; 9830 s->size += 16; 9831 break; 9832 } 9833 return TRUE; 9834} 9835 9836/* Set DF_TEXTREL if we find any dynamic relocs that apply to 9837 read-only sections. */ 9838 9839static bfd_boolean 9840maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 9841{ 9842 if (h->root.type == bfd_link_hash_indirect) 9843 return TRUE; 9844 9845 if (readonly_dynrelocs (h)) 9846 { 9847 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 9848 9849 /* Not an error, just cut short the traversal. */ 9850 return FALSE; 9851 } 9852 return TRUE; 9853} 9854 9855/* Set the sizes of the dynamic sections. */ 9856 9857static bfd_boolean 9858ppc64_elf_size_dynamic_sections (bfd *output_bfd, 9859 struct bfd_link_info *info) 9860{ 9861 struct ppc_link_hash_table *htab; 9862 bfd *dynobj; 9863 asection *s; 9864 bfd_boolean relocs; 9865 bfd *ibfd; 9866 struct got_entry *first_tlsld; 9867 9868 htab = ppc_hash_table (info); 9869 if (htab == NULL) 9870 return FALSE; 9871 9872 dynobj = htab->elf.dynobj; 9873 if (dynobj == NULL) 9874 abort (); 9875 9876 if (htab->elf.dynamic_sections_created) 9877 { 9878 /* Set the contents of the .interp section to the interpreter. */ 9879 if (bfd_link_executable (info) && !info->nointerp) 9880 { 9881 s = bfd_get_linker_section (dynobj, ".interp"); 9882 if (s == NULL) 9883 abort (); 9884 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 9885 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 9886 } 9887 } 9888 9889 /* Set up .got offsets for local syms, and space for local dynamic 9890 relocs. */ 9891 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 9892 { 9893 struct got_entry **lgot_ents; 9894 struct got_entry **end_lgot_ents; 9895 struct plt_entry **local_plt; 9896 struct plt_entry **end_local_plt; 9897 unsigned char *lgot_masks; 9898 bfd_size_type locsymcount; 9899 Elf_Internal_Shdr *symtab_hdr; 9900 9901 if (!is_ppc64_elf (ibfd)) 9902 continue; 9903 9904 for (s = ibfd->sections; s != NULL; s = s->next) 9905 { 9906 struct ppc_dyn_relocs *p; 9907 9908 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 9909 { 9910 if (!bfd_is_abs_section (p->sec) 9911 && bfd_is_abs_section (p->sec->output_section)) 9912 { 9913 /* Input section has been discarded, either because 9914 it is a copy of a linkonce section or due to 9915 linker script /DISCARD/, so we'll be discarding 9916 the relocs too. */ 9917 } 9918 else if (p->count != 0) 9919 { 9920 asection *srel = elf_section_data (p->sec)->sreloc; 9921 if (p->ifunc) 9922 srel = htab->elf.irelplt; 9923 srel->size += p->count * sizeof (Elf64_External_Rela); 9924 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 9925 info->flags |= DF_TEXTREL; 9926 } 9927 } 9928 } 9929 9930 lgot_ents = elf_local_got_ents (ibfd); 9931 if (!lgot_ents) 9932 continue; 9933 9934 symtab_hdr = &elf_symtab_hdr (ibfd); 9935 locsymcount = symtab_hdr->sh_info; 9936 end_lgot_ents = lgot_ents + locsymcount; 9937 local_plt = (struct plt_entry **) end_lgot_ents; 9938 end_local_plt = local_plt + locsymcount; 9939 lgot_masks = (unsigned char *) end_local_plt; 9940 s = ppc64_elf_tdata (ibfd)->got; 9941 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) 9942 { 9943 struct got_entry **pent, *ent; 9944 9945 pent = lgot_ents; 9946 while ((ent = *pent) != NULL) 9947 if (ent->got.refcount > 0) 9948 { 9949 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) 9950 { 9951 ppc64_tlsld_got (ibfd)->got.refcount += 1; 9952 *pent = ent->next; 9953 } 9954 else 9955 { 9956 unsigned int ent_size = 8; 9957 unsigned int rel_size = sizeof (Elf64_External_Rela); 9958 9959 ent->got.offset = s->size; 9960 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) 9961 { 9962 ent_size *= 2; 9963 rel_size *= 2; 9964 } 9965 s->size += ent_size; 9966 if ((*lgot_masks & PLT_IFUNC) != 0) 9967 { 9968 htab->elf.irelplt->size += rel_size; 9969 htab->got_reli_size += rel_size; 9970 } 9971 else if (bfd_link_pic (info)) 9972 { 9973 asection *srel = ppc64_elf_tdata (ibfd)->relgot; 9974 srel->size += rel_size; 9975 } 9976 pent = &ent->next; 9977 } 9978 } 9979 else 9980 *pent = ent->next; 9981 } 9982 9983 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 9984 for (; local_plt < end_local_plt; ++local_plt) 9985 { 9986 struct plt_entry *ent; 9987 9988 for (ent = *local_plt; ent != NULL; ent = ent->next) 9989 if (ent->plt.refcount > 0) 9990 { 9991 s = htab->elf.iplt; 9992 ent->plt.offset = s->size; 9993 s->size += PLT_ENTRY_SIZE (htab); 9994 9995 htab->elf.irelplt->size += sizeof (Elf64_External_Rela); 9996 } 9997 else 9998 ent->plt.offset = (bfd_vma) -1; 9999 } 10000 } 10001 10002 /* Allocate global sym .plt and .got entries, and space for global 10003 sym dynamic relocs. */ 10004 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 10005 /* Stash the end of glink branch table. */ 10006 if (htab->glink != NULL) 10007 htab->glink->rawsize = htab->glink->size; 10008 10009 if (!htab->opd_abi && !bfd_link_pic (info)) 10010 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info); 10011 10012 first_tlsld = NULL; 10013 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 10014 { 10015 struct got_entry *ent; 10016 10017 if (!is_ppc64_elf (ibfd)) 10018 continue; 10019 10020 ent = ppc64_tlsld_got (ibfd); 10021 if (ent->got.refcount > 0) 10022 { 10023 if (!htab->do_multi_toc && first_tlsld != NULL) 10024 { 10025 ent->is_indirect = TRUE; 10026 ent->got.ent = first_tlsld; 10027 } 10028 else 10029 { 10030 if (first_tlsld == NULL) 10031 first_tlsld = ent; 10032 s = ppc64_elf_tdata (ibfd)->got; 10033 ent->got.offset = s->size; 10034 ent->owner = ibfd; 10035 s->size += 16; 10036 if (bfd_link_pic (info)) 10037 { 10038 asection *srel = ppc64_elf_tdata (ibfd)->relgot; 10039 srel->size += sizeof (Elf64_External_Rela); 10040 } 10041 } 10042 } 10043 else 10044 ent->got.offset = (bfd_vma) -1; 10045 } 10046 10047 /* We now have determined the sizes of the various dynamic sections. 10048 Allocate memory for them. */ 10049 relocs = FALSE; 10050 for (s = dynobj->sections; s != NULL; s = s->next) 10051 { 10052 if ((s->flags & SEC_LINKER_CREATED) == 0) 10053 continue; 10054 10055 if (s == htab->brlt || s == htab->relbrlt) 10056 /* These haven't been allocated yet; don't strip. */ 10057 continue; 10058 else if (s == htab->elf.sgot 10059 || s == htab->elf.splt 10060 || s == htab->elf.iplt 10061 || s == htab->glink 10062 || s == htab->dynbss) 10063 { 10064 /* Strip this section if we don't need it; see the 10065 comment below. */ 10066 } 10067 else if (s == htab->glink_eh_frame) 10068 { 10069 if (!bfd_is_abs_section (s->output_section)) 10070 /* Not sized yet. */ 10071 continue; 10072 } 10073 else if (CONST_STRNEQ (s->name, ".rela")) 10074 { 10075 if (s->size != 0) 10076 { 10077 if (s != htab->elf.srelplt) 10078 relocs = TRUE; 10079 10080 /* We use the reloc_count field as a counter if we need 10081 to copy relocs into the output file. */ 10082 s->reloc_count = 0; 10083 } 10084 } 10085 else 10086 { 10087 /* It's not one of our sections, so don't allocate space. */ 10088 continue; 10089 } 10090 10091 if (s->size == 0) 10092 { 10093 /* If we don't need this section, strip it from the 10094 output file. This is mostly to handle .rela.bss and 10095 .rela.plt. We must create both sections in 10096 create_dynamic_sections, because they must be created 10097 before the linker maps input sections to output 10098 sections. The linker does that before 10099 adjust_dynamic_symbol is called, and it is that 10100 function which decides whether anything needs to go 10101 into these sections. */ 10102 s->flags |= SEC_EXCLUDE; 10103 continue; 10104 } 10105 10106 if ((s->flags & SEC_HAS_CONTENTS) == 0) 10107 continue; 10108 10109 /* Allocate memory for the section contents. We use bfd_zalloc 10110 here in case unused entries are not reclaimed before the 10111 section's contents are written out. This should not happen, 10112 but this way if it does we get a R_PPC64_NONE reloc in .rela 10113 sections instead of garbage. 10114 We also rely on the section contents being zero when writing 10115 the GOT. */ 10116 s->contents = bfd_zalloc (dynobj, s->size); 10117 if (s->contents == NULL) 10118 return FALSE; 10119 } 10120 10121 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 10122 { 10123 if (!is_ppc64_elf (ibfd)) 10124 continue; 10125 10126 s = ppc64_elf_tdata (ibfd)->got; 10127 if (s != NULL && s != htab->elf.sgot) 10128 { 10129 if (s->size == 0) 10130 s->flags |= SEC_EXCLUDE; 10131 else 10132 { 10133 s->contents = bfd_zalloc (ibfd, s->size); 10134 if (s->contents == NULL) 10135 return FALSE; 10136 } 10137 } 10138 s = ppc64_elf_tdata (ibfd)->relgot; 10139 if (s != NULL) 10140 { 10141 if (s->size == 0) 10142 s->flags |= SEC_EXCLUDE; 10143 else 10144 { 10145 s->contents = bfd_zalloc (ibfd, s->size); 10146 if (s->contents == NULL) 10147 return FALSE; 10148 relocs = TRUE; 10149 s->reloc_count = 0; 10150 } 10151 } 10152 } 10153 10154 if (htab->elf.dynamic_sections_created) 10155 { 10156 bfd_boolean tls_opt; 10157 10158 /* Add some entries to the .dynamic section. We fill in the 10159 values later, in ppc64_elf_finish_dynamic_sections, but we 10160 must add the entries now so that we get the correct size for 10161 the .dynamic section. The DT_DEBUG entry is filled in by the 10162 dynamic linker and used by the debugger. */ 10163#define add_dynamic_entry(TAG, VAL) \ 10164 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 10165 10166 if (bfd_link_executable (info)) 10167 { 10168 if (!add_dynamic_entry (DT_DEBUG, 0)) 10169 return FALSE; 10170 } 10171 10172 if (htab->elf.splt != NULL && htab->elf.splt->size != 0) 10173 { 10174 if (!add_dynamic_entry (DT_PLTGOT, 0) 10175 || !add_dynamic_entry (DT_PLTRELSZ, 0) 10176 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 10177 || !add_dynamic_entry (DT_JMPREL, 0) 10178 || !add_dynamic_entry (DT_PPC64_GLINK, 0)) 10179 return FALSE; 10180 } 10181 10182 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1) 10183 { 10184 if (!add_dynamic_entry (DT_PPC64_OPD, 0) 10185 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) 10186 return FALSE; 10187 } 10188 10189 tls_opt = (htab->params->tls_get_addr_opt 10190 && htab->tls_get_addr_fd != NULL 10191 && htab->tls_get_addr_fd->elf.plt.plist != NULL); 10192 if (tls_opt || !htab->opd_abi) 10193 { 10194 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0)) 10195 return FALSE; 10196 } 10197 10198 if (relocs) 10199 { 10200 if (!add_dynamic_entry (DT_RELA, 0) 10201 || !add_dynamic_entry (DT_RELASZ, 0) 10202 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 10203 return FALSE; 10204 10205 /* If any dynamic relocs apply to a read-only section, 10206 then we need a DT_TEXTREL entry. */ 10207 if ((info->flags & DF_TEXTREL) == 0) 10208 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); 10209 10210 if ((info->flags & DF_TEXTREL) != 0) 10211 { 10212 if (!add_dynamic_entry (DT_TEXTREL, 0)) 10213 return FALSE; 10214 } 10215 } 10216 } 10217#undef add_dynamic_entry 10218 10219 return TRUE; 10220} 10221 10222/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 10223 10224static bfd_boolean 10225ppc64_elf_hash_symbol (struct elf_link_hash_entry *h) 10226{ 10227 if (h->plt.plist != NULL 10228 && !h->def_regular 10229 && !h->pointer_equality_needed) 10230 return FALSE; 10231 10232 return _bfd_elf_hash_symbol (h); 10233} 10234 10235/* Determine the type of stub needed, if any, for a call. */ 10236 10237static inline enum ppc_stub_type 10238ppc_type_of_stub (asection *input_sec, 10239 const Elf_Internal_Rela *rel, 10240 struct ppc_link_hash_entry **hash, 10241 struct plt_entry **plt_ent, 10242 bfd_vma destination, 10243 unsigned long local_off) 10244{ 10245 struct ppc_link_hash_entry *h = *hash; 10246 bfd_vma location; 10247 bfd_vma branch_offset; 10248 bfd_vma max_branch_offset; 10249 enum elf_ppc64_reloc_type r_type; 10250 10251 if (h != NULL) 10252 { 10253 struct plt_entry *ent; 10254 struct ppc_link_hash_entry *fdh = h; 10255 if (h->oh != NULL 10256 && h->oh->is_func_descriptor) 10257 { 10258 fdh = ppc_follow_link (h->oh); 10259 *hash = fdh; 10260 } 10261 10262 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) 10263 if (ent->addend == rel->r_addend 10264 && ent->plt.offset != (bfd_vma) -1) 10265 { 10266 *plt_ent = ent; 10267 return ppc_stub_plt_call; 10268 } 10269 10270 /* Here, we know we don't have a plt entry. If we don't have a 10271 either a defined function descriptor or a defined entry symbol 10272 in a regular object file, then it is pointless trying to make 10273 any other type of stub. */ 10274 if (!is_static_defined (&fdh->elf) 10275 && !is_static_defined (&h->elf)) 10276 return ppc_stub_none; 10277 } 10278 else if (elf_local_got_ents (input_sec->owner) != NULL) 10279 { 10280 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner); 10281 struct plt_entry **local_plt = (struct plt_entry **) 10282 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info; 10283 unsigned long r_symndx = ELF64_R_SYM (rel->r_info); 10284 10285 if (local_plt[r_symndx] != NULL) 10286 { 10287 struct plt_entry *ent; 10288 10289 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next) 10290 if (ent->addend == rel->r_addend 10291 && ent->plt.offset != (bfd_vma) -1) 10292 { 10293 *plt_ent = ent; 10294 return ppc_stub_plt_call; 10295 } 10296 } 10297 } 10298 10299 /* Determine where the call point is. */ 10300 location = (input_sec->output_offset 10301 + input_sec->output_section->vma 10302 + rel->r_offset); 10303 10304 branch_offset = destination - location; 10305 r_type = ELF64_R_TYPE (rel->r_info); 10306 10307 /* Determine if a long branch stub is needed. */ 10308 max_branch_offset = 1 << 25; 10309 if (r_type != R_PPC64_REL24) 10310 max_branch_offset = 1 << 15; 10311 10312 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off) 10313 /* We need a stub. Figure out whether a long_branch or plt_branch 10314 is needed later. */ 10315 return ppc_stub_long_branch; 10316 10317 return ppc_stub_none; 10318} 10319 10320/* With power7 weakly ordered memory model, it is possible for ld.so 10321 to update a plt entry in one thread and have another thread see a 10322 stale zero toc entry. To avoid this we need some sort of acquire 10323 barrier in the call stub. One solution is to make the load of the 10324 toc word seem to appear to depend on the load of the function entry 10325 word. Another solution is to test for r2 being zero, and branch to 10326 the appropriate glink entry if so. 10327 10328 . fake dep barrier compare 10329 . ld 12,xxx(2) ld 12,xxx(2) 10330 . mtctr 12 mtctr 12 10331 . xor 11,12,12 ld 2,xxx+8(2) 10332 . add 2,2,11 cmpldi 2,0 10333 . ld 2,xxx+8(2) bnectr+ 10334 . bctr b <glink_entry> 10335 10336 The solution involving the compare turns out to be faster, so 10337 that's what we use unless the branch won't reach. */ 10338 10339#define ALWAYS_USE_FAKE_DEP 0 10340#define ALWAYS_EMIT_R2SAVE 0 10341 10342#define PPC_LO(v) ((v) & 0xffff) 10343#define PPC_HI(v) (((v) >> 16) & 0xffff) 10344#define PPC_HA(v) PPC_HI ((v) + 0x8000) 10345 10346static inline unsigned int 10347plt_stub_size (struct ppc_link_hash_table *htab, 10348 struct ppc_stub_hash_entry *stub_entry, 10349 bfd_vma off) 10350{ 10351 unsigned size = 12; 10352 10353 if (ALWAYS_EMIT_R2SAVE 10354 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10355 size += 4; 10356 if (PPC_HA (off) != 0) 10357 size += 4; 10358 if (htab->opd_abi) 10359 { 10360 size += 4; 10361 if (htab->params->plt_static_chain) 10362 size += 4; 10363 if (htab->params->plt_thread_safe 10364 && htab->elf.dynamic_sections_created 10365 && stub_entry->h != NULL 10366 && stub_entry->h->elf.dynindx != -1) 10367 size += 8; 10368 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off)) 10369 size += 4; 10370 } 10371 if (stub_entry->h != NULL 10372 && (stub_entry->h == htab->tls_get_addr_fd 10373 || stub_entry->h == htab->tls_get_addr) 10374 && htab->params->tls_get_addr_opt) 10375 size += 13 * 4; 10376 return size; 10377} 10378 10379/* If this stub would cross fewer 2**plt_stub_align boundaries if we align, 10380 then return the padding needed to do so. */ 10381static inline unsigned int 10382plt_stub_pad (struct ppc_link_hash_table *htab, 10383 struct ppc_stub_hash_entry *stub_entry, 10384 bfd_vma plt_off) 10385{ 10386 int stub_align = 1 << htab->params->plt_stub_align; 10387 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off); 10388 bfd_vma stub_off = stub_entry->group->stub_sec->size; 10389 10390 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align) 10391 > ((stub_size - 1) & -stub_align)) 10392 return stub_align - (stub_off & (stub_align - 1)); 10393 return 0; 10394} 10395 10396/* Build a .plt call stub. */ 10397 10398static inline bfd_byte * 10399build_plt_stub (struct ppc_link_hash_table *htab, 10400 struct ppc_stub_hash_entry *stub_entry, 10401 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) 10402{ 10403 bfd *obfd = htab->params->stub_bfd; 10404 bfd_boolean plt_load_toc = htab->opd_abi; 10405 bfd_boolean plt_static_chain = htab->params->plt_static_chain; 10406 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe 10407 && htab->elf.dynamic_sections_created 10408 && stub_entry->h != NULL 10409 && stub_entry->h->elf.dynindx != -1); 10410 bfd_boolean use_fake_dep = plt_thread_safe; 10411 bfd_vma cmp_branch_off = 0; 10412 10413 if (!ALWAYS_USE_FAKE_DEP 10414 && plt_load_toc 10415 && plt_thread_safe 10416 && !((stub_entry->h == htab->tls_get_addr_fd 10417 || stub_entry->h == htab->tls_get_addr) 10418 && htab->params->tls_get_addr_opt)) 10419 { 10420 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1; 10421 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab)) 10422 / PLT_ENTRY_SIZE (htab)); 10423 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8; 10424 bfd_vma to, from; 10425 10426 if (pltindex > 32768) 10427 glinkoff += (pltindex - 32768) * 4; 10428 to = (glinkoff 10429 + htab->glink->output_offset 10430 + htab->glink->output_section->vma); 10431 from = (p - stub_entry->group->stub_sec->contents 10432 + 4 * (ALWAYS_EMIT_R2SAVE 10433 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10434 + 4 * (PPC_HA (offset) != 0) 10435 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain) 10436 != PPC_HA (offset)) 10437 + 4 * (plt_static_chain != 0) 10438 + 20 10439 + stub_entry->group->stub_sec->output_offset 10440 + stub_entry->group->stub_sec->output_section->vma); 10441 cmp_branch_off = to - from; 10442 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); 10443 } 10444 10445 if (PPC_HA (offset) != 0) 10446 { 10447 if (r != NULL) 10448 { 10449 if (ALWAYS_EMIT_R2SAVE 10450 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10451 r[0].r_offset += 4; 10452 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); 10453 r[1].r_offset = r[0].r_offset + 4; 10454 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); 10455 r[1].r_addend = r[0].r_addend; 10456 if (plt_load_toc) 10457 { 10458 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) 10459 { 10460 r[2].r_offset = r[1].r_offset + 4; 10461 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO); 10462 r[2].r_addend = r[0].r_addend; 10463 } 10464 else 10465 { 10466 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep; 10467 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); 10468 r[2].r_addend = r[0].r_addend + 8; 10469 if (plt_static_chain) 10470 { 10471 r[3].r_offset = r[2].r_offset + 4; 10472 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); 10473 r[3].r_addend = r[0].r_addend + 16; 10474 } 10475 } 10476 } 10477 } 10478 if (ALWAYS_EMIT_R2SAVE 10479 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10480 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; 10481 if (plt_load_toc) 10482 { 10483 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4; 10484 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4; 10485 } 10486 else 10487 { 10488 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; 10489 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4; 10490 } 10491 if (plt_load_toc 10492 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) 10493 { 10494 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4; 10495 offset = 0; 10496 } 10497 bfd_put_32 (obfd, MTCTR_R12, p), p += 4; 10498 if (plt_load_toc) 10499 { 10500 if (use_fake_dep) 10501 { 10502 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4; 10503 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4; 10504 } 10505 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4; 10506 if (plt_static_chain) 10507 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4; 10508 } 10509 } 10510 else 10511 { 10512 if (r != NULL) 10513 { 10514 if (ALWAYS_EMIT_R2SAVE 10515 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10516 r[0].r_offset += 4; 10517 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); 10518 if (plt_load_toc) 10519 { 10520 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) 10521 { 10522 r[1].r_offset = r[0].r_offset + 4; 10523 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16); 10524 r[1].r_addend = r[0].r_addend; 10525 } 10526 else 10527 { 10528 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep; 10529 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); 10530 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain; 10531 if (plt_static_chain) 10532 { 10533 r[2].r_offset = r[1].r_offset + 4; 10534 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); 10535 r[2].r_addend = r[0].r_addend + 8; 10536 } 10537 } 10538 } 10539 } 10540 if (ALWAYS_EMIT_R2SAVE 10541 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 10542 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; 10543 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4; 10544 if (plt_load_toc 10545 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) 10546 { 10547 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; 10548 offset = 0; 10549 } 10550 bfd_put_32 (obfd, MTCTR_R12, p), p += 4; 10551 if (plt_load_toc) 10552 { 10553 if (use_fake_dep) 10554 { 10555 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4; 10556 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4; 10557 } 10558 if (plt_static_chain) 10559 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; 10560 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; 10561 } 10562 } 10563 if (plt_load_toc && plt_thread_safe && !use_fake_dep) 10564 { 10565 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4; 10566 bfd_put_32 (obfd, BNECTR_P4, p), p += 4; 10567 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4; 10568 } 10569 else 10570 bfd_put_32 (obfd, BCTR, p), p += 4; 10571 return p; 10572} 10573 10574/* Build a special .plt call stub for __tls_get_addr. */ 10575 10576#define LD_R11_0R3 0xe9630000 10577#define LD_R12_0R3 0xe9830000 10578#define MR_R0_R3 0x7c601b78 10579#define CMPDI_R11_0 0x2c2b0000 10580#define ADD_R3_R12_R13 0x7c6c6a14 10581#define BEQLR 0x4d820020 10582#define MR_R3_R0 0x7c030378 10583#define STD_R11_0R1 0xf9610000 10584#define BCTRL 0x4e800421 10585#define LD_R11_0R1 0xe9610000 10586#define MTLR_R11 0x7d6803a6 10587 10588static inline bfd_byte * 10589build_tls_get_addr_stub (struct ppc_link_hash_table *htab, 10590 struct ppc_stub_hash_entry *stub_entry, 10591 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) 10592{ 10593 bfd *obfd = htab->params->stub_bfd; 10594 10595 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4; 10596 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4; 10597 bfd_put_32 (obfd, MR_R0_R3, p), p += 4; 10598 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4; 10599 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4; 10600 bfd_put_32 (obfd, BEQLR, p), p += 4; 10601 bfd_put_32 (obfd, MR_R3_R0, p), p += 4; 10602 bfd_put_32 (obfd, MFLR_R11, p), p += 4; 10603 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4; 10604 10605 if (r != NULL) 10606 r[0].r_offset += 9 * 4; 10607 p = build_plt_stub (htab, stub_entry, p, offset, r); 10608 bfd_put_32 (obfd, BCTRL, p - 4); 10609 10610 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4; 10611 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4; 10612 bfd_put_32 (obfd, MTLR_R11, p), p += 4; 10613 bfd_put_32 (obfd, BLR, p), p += 4; 10614 10615 return p; 10616} 10617 10618static Elf_Internal_Rela * 10619get_relocs (asection *sec, int count) 10620{ 10621 Elf_Internal_Rela *relocs; 10622 struct bfd_elf_section_data *elfsec_data; 10623 10624 elfsec_data = elf_section_data (sec); 10625 relocs = elfsec_data->relocs; 10626 if (relocs == NULL) 10627 { 10628 bfd_size_type relsize; 10629 relsize = sec->reloc_count * sizeof (*relocs); 10630 relocs = bfd_alloc (sec->owner, relsize); 10631 if (relocs == NULL) 10632 return NULL; 10633 elfsec_data->relocs = relocs; 10634 elfsec_data->rela.hdr = bfd_zalloc (sec->owner, 10635 sizeof (Elf_Internal_Shdr)); 10636 if (elfsec_data->rela.hdr == NULL) 10637 return NULL; 10638 elfsec_data->rela.hdr->sh_size = (sec->reloc_count 10639 * sizeof (Elf64_External_Rela)); 10640 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela); 10641 sec->reloc_count = 0; 10642 } 10643 relocs += sec->reloc_count; 10644 sec->reloc_count += count; 10645 return relocs; 10646} 10647 10648static bfd_vma 10649get_r2off (struct bfd_link_info *info, 10650 struct ppc_stub_hash_entry *stub_entry) 10651{ 10652 struct ppc_link_hash_table *htab = ppc_hash_table (info); 10653 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off; 10654 10655 if (r2off == 0) 10656 { 10657 /* Support linking -R objects. Get the toc pointer from the 10658 opd entry. */ 10659 char buf[8]; 10660 if (!htab->opd_abi) 10661 return r2off; 10662 asection *opd = stub_entry->h->elf.root.u.def.section; 10663 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value; 10664 10665 if (strcmp (opd->name, ".opd") != 0 10666 || opd->reloc_count != 0) 10667 { 10668 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"), 10669 stub_entry->h->elf.root.root.string); 10670 bfd_set_error (bfd_error_bad_value); 10671 return (bfd_vma) -1; 10672 } 10673 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8)) 10674 return (bfd_vma) -1; 10675 r2off = bfd_get_64 (opd->owner, buf); 10676 r2off -= elf_gp (info->output_bfd); 10677 } 10678 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off; 10679 return r2off; 10680} 10681 10682static bfd_boolean 10683ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 10684{ 10685 struct ppc_stub_hash_entry *stub_entry; 10686 struct ppc_branch_hash_entry *br_entry; 10687 struct bfd_link_info *info; 10688 struct ppc_link_hash_table *htab; 10689 bfd_byte *loc; 10690 bfd_byte *p; 10691 bfd_vma dest, off; 10692 int size; 10693 Elf_Internal_Rela *r; 10694 asection *plt; 10695 10696 /* Massage our args to the form they really have. */ 10697 stub_entry = (struct ppc_stub_hash_entry *) gen_entry; 10698 info = in_arg; 10699 10700 htab = ppc_hash_table (info); 10701 if (htab == NULL) 10702 return FALSE; 10703 10704 /* Make a note of the offset within the stubs for this entry. */ 10705 stub_entry->stub_offset = stub_entry->group->stub_sec->size; 10706 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset; 10707 10708 htab->stub_count[stub_entry->stub_type - 1] += 1; 10709 switch (stub_entry->stub_type) 10710 { 10711 case ppc_stub_long_branch: 10712 case ppc_stub_long_branch_r2off: 10713 /* Branches are relative. This is where we are going to. */ 10714 dest = (stub_entry->target_value 10715 + stub_entry->target_section->output_offset 10716 + stub_entry->target_section->output_section->vma); 10717 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); 10718 off = dest; 10719 10720 /* And this is where we are coming from. */ 10721 off -= (stub_entry->stub_offset 10722 + stub_entry->group->stub_sec->output_offset 10723 + stub_entry->group->stub_sec->output_section->vma); 10724 10725 size = 4; 10726 if (stub_entry->stub_type == ppc_stub_long_branch_r2off) 10727 { 10728 bfd_vma r2off = get_r2off (info, stub_entry); 10729 10730 if (r2off == (bfd_vma) -1) 10731 { 10732 htab->stub_error = TRUE; 10733 return FALSE; 10734 } 10735 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc); 10736 loc += 4; 10737 size = 8; 10738 if (PPC_HA (r2off) != 0) 10739 { 10740 bfd_put_32 (htab->params->stub_bfd, 10741 ADDIS_R2_R2 | PPC_HA (r2off), loc); 10742 loc += 4; 10743 size += 4; 10744 } 10745 if (PPC_LO (r2off) != 0) 10746 { 10747 bfd_put_32 (htab->params->stub_bfd, 10748 ADDI_R2_R2 | PPC_LO (r2off), loc); 10749 loc += 4; 10750 size += 4; 10751 } 10752 off -= size - 4; 10753 } 10754 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc); 10755 10756 if (off + (1 << 25) >= (bfd_vma) (1 << 26)) 10757 { 10758 info->callbacks->einfo 10759 (_("%P: long branch stub `%s' offset overflow\n"), 10760 stub_entry->root.string); 10761 htab->stub_error = TRUE; 10762 return FALSE; 10763 } 10764 10765 if (info->emitrelocations) 10766 { 10767 r = get_relocs (stub_entry->group->stub_sec, 1); 10768 if (r == NULL) 10769 return FALSE; 10770 r->r_offset = loc - stub_entry->group->stub_sec->contents; 10771 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); 10772 r->r_addend = dest; 10773 if (stub_entry->h != NULL) 10774 { 10775 struct elf_link_hash_entry **hashes; 10776 unsigned long symndx; 10777 struct ppc_link_hash_entry *h; 10778 10779 hashes = elf_sym_hashes (htab->params->stub_bfd); 10780 if (hashes == NULL) 10781 { 10782 bfd_size_type hsize; 10783 10784 hsize = (htab->stub_globals + 1) * sizeof (*hashes); 10785 hashes = bfd_zalloc (htab->params->stub_bfd, hsize); 10786 if (hashes == NULL) 10787 return FALSE; 10788 elf_sym_hashes (htab->params->stub_bfd) = hashes; 10789 htab->stub_globals = 1; 10790 } 10791 symndx = htab->stub_globals++; 10792 h = stub_entry->h; 10793 hashes[symndx] = &h->elf; 10794 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24); 10795 if (h->oh != NULL && h->oh->is_func) 10796 h = ppc_follow_link (h->oh); 10797 if (h->elf.root.u.def.section != stub_entry->target_section) 10798 /* H is an opd symbol. The addend must be zero. */ 10799 r->r_addend = 0; 10800 else 10801 { 10802 off = (h->elf.root.u.def.value 10803 + h->elf.root.u.def.section->output_offset 10804 + h->elf.root.u.def.section->output_section->vma); 10805 r->r_addend -= off; 10806 } 10807 } 10808 } 10809 break; 10810 10811 case ppc_stub_plt_branch: 10812 case ppc_stub_plt_branch_r2off: 10813 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, 10814 stub_entry->root.string + 9, 10815 FALSE, FALSE); 10816 if (br_entry == NULL) 10817 { 10818 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"), 10819 stub_entry->root.string); 10820 htab->stub_error = TRUE; 10821 return FALSE; 10822 } 10823 10824 dest = (stub_entry->target_value 10825 + stub_entry->target_section->output_offset 10826 + stub_entry->target_section->output_section->vma); 10827 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) 10828 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); 10829 10830 bfd_put_64 (htab->brlt->owner, dest, 10831 htab->brlt->contents + br_entry->offset); 10832 10833 if (br_entry->iter == htab->stub_iteration) 10834 { 10835 br_entry->iter = 0; 10836 10837 if (htab->relbrlt != NULL) 10838 { 10839 /* Create a reloc for the branch lookup table entry. */ 10840 Elf_Internal_Rela rela; 10841 bfd_byte *rl; 10842 10843 rela.r_offset = (br_entry->offset 10844 + htab->brlt->output_offset 10845 + htab->brlt->output_section->vma); 10846 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 10847 rela.r_addend = dest; 10848 10849 rl = htab->relbrlt->contents; 10850 rl += (htab->relbrlt->reloc_count++ 10851 * sizeof (Elf64_External_Rela)); 10852 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); 10853 } 10854 else if (info->emitrelocations) 10855 { 10856 r = get_relocs (htab->brlt, 1); 10857 if (r == NULL) 10858 return FALSE; 10859 /* brlt, being SEC_LINKER_CREATED does not go through the 10860 normal reloc processing. Symbols and offsets are not 10861 translated from input file to output file form, so 10862 set up the offset per the output file. */ 10863 r->r_offset = (br_entry->offset 10864 + htab->brlt->output_offset 10865 + htab->brlt->output_section->vma); 10866 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 10867 r->r_addend = dest; 10868 } 10869 } 10870 10871 dest = (br_entry->offset 10872 + htab->brlt->output_offset 10873 + htab->brlt->output_section->vma); 10874 10875 off = (dest 10876 - elf_gp (htab->brlt->output_section->owner) 10877 - htab->sec_info[stub_entry->group->link_sec->id].toc_off); 10878 10879 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) 10880 { 10881 info->callbacks->einfo 10882 (_("%P: linkage table error against `%T'\n"), 10883 stub_entry->root.string); 10884 bfd_set_error (bfd_error_bad_value); 10885 htab->stub_error = TRUE; 10886 return FALSE; 10887 } 10888 10889 if (info->emitrelocations) 10890 { 10891 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0)); 10892 if (r == NULL) 10893 return FALSE; 10894 r[0].r_offset = loc - stub_entry->group->stub_sec->contents; 10895 if (bfd_big_endian (info->output_bfd)) 10896 r[0].r_offset += 2; 10897 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off) 10898 r[0].r_offset += 4; 10899 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); 10900 r[0].r_addend = dest; 10901 if (PPC_HA (off) != 0) 10902 { 10903 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); 10904 r[1].r_offset = r[0].r_offset + 4; 10905 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); 10906 r[1].r_addend = r[0].r_addend; 10907 } 10908 } 10909 10910 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) 10911 { 10912 if (PPC_HA (off) != 0) 10913 { 10914 size = 16; 10915 bfd_put_32 (htab->params->stub_bfd, 10916 ADDIS_R12_R2 | PPC_HA (off), loc); 10917 loc += 4; 10918 bfd_put_32 (htab->params->stub_bfd, 10919 LD_R12_0R12 | PPC_LO (off), loc); 10920 } 10921 else 10922 { 10923 size = 12; 10924 bfd_put_32 (htab->params->stub_bfd, 10925 LD_R12_0R2 | PPC_LO (off), loc); 10926 } 10927 } 10928 else 10929 { 10930 bfd_vma r2off = get_r2off (info, stub_entry); 10931 10932 if (r2off == (bfd_vma) -1) 10933 { 10934 htab->stub_error = TRUE; 10935 return FALSE; 10936 } 10937 10938 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc); 10939 loc += 4; 10940 size = 16; 10941 if (PPC_HA (off) != 0) 10942 { 10943 size += 4; 10944 bfd_put_32 (htab->params->stub_bfd, 10945 ADDIS_R12_R2 | PPC_HA (off), loc); 10946 loc += 4; 10947 bfd_put_32 (htab->params->stub_bfd, 10948 LD_R12_0R12 | PPC_LO (off), loc); 10949 } 10950 else 10951 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc); 10952 10953 if (PPC_HA (r2off) != 0) 10954 { 10955 size += 4; 10956 loc += 4; 10957 bfd_put_32 (htab->params->stub_bfd, 10958 ADDIS_R2_R2 | PPC_HA (r2off), loc); 10959 } 10960 if (PPC_LO (r2off) != 0) 10961 { 10962 size += 4; 10963 loc += 4; 10964 bfd_put_32 (htab->params->stub_bfd, 10965 ADDI_R2_R2 | PPC_LO (r2off), loc); 10966 } 10967 } 10968 loc += 4; 10969 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc); 10970 loc += 4; 10971 bfd_put_32 (htab->params->stub_bfd, BCTR, loc); 10972 break; 10973 10974 case ppc_stub_plt_call: 10975 case ppc_stub_plt_call_r2save: 10976 if (stub_entry->h != NULL 10977 && stub_entry->h->is_func_descriptor 10978 && stub_entry->h->oh != NULL) 10979 { 10980 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh); 10981 10982 /* If the old-ABI "dot-symbol" is undefined make it weak so 10983 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */ 10984 if (fh->elf.root.type == bfd_link_hash_undefined) 10985 fh->elf.root.type = bfd_link_hash_undefweak; 10986 /* Stop undo_symbol_twiddle changing it back to undefined. */ 10987 fh->was_undefined = 0; 10988 } 10989 10990 /* Now build the stub. */ 10991 dest = stub_entry->plt_ent->plt.offset & ~1; 10992 if (dest >= (bfd_vma) -2) 10993 abort (); 10994 10995 plt = htab->elf.splt; 10996 if (!htab->elf.dynamic_sections_created 10997 || stub_entry->h == NULL 10998 || stub_entry->h->elf.dynindx == -1) 10999 plt = htab->elf.iplt; 11000 11001 dest += plt->output_offset + plt->output_section->vma; 11002 11003 if (stub_entry->h == NULL 11004 && (stub_entry->plt_ent->plt.offset & 1) == 0) 11005 { 11006 Elf_Internal_Rela rela; 11007 bfd_byte *rl; 11008 11009 rela.r_offset = dest; 11010 if (htab->opd_abi) 11011 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); 11012 else 11013 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); 11014 rela.r_addend = (stub_entry->target_value 11015 + stub_entry->target_section->output_offset 11016 + stub_entry->target_section->output_section->vma); 11017 11018 rl = (htab->elf.irelplt->contents 11019 + (htab->elf.irelplt->reloc_count++ 11020 * sizeof (Elf64_External_Rela))); 11021 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl); 11022 stub_entry->plt_ent->plt.offset |= 1; 11023 } 11024 11025 off = (dest 11026 - elf_gp (plt->output_section->owner) 11027 - htab->sec_info[stub_entry->group->link_sec->id].toc_off); 11028 11029 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) 11030 { 11031 info->callbacks->einfo 11032 (_("%P: linkage table error against `%T'\n"), 11033 stub_entry->h != NULL 11034 ? stub_entry->h->elf.root.root.string 11035 : "<local sym>"); 11036 bfd_set_error (bfd_error_bad_value); 11037 htab->stub_error = TRUE; 11038 return FALSE; 11039 } 11040 11041 if (htab->params->plt_stub_align != 0) 11042 { 11043 unsigned pad = plt_stub_pad (htab, stub_entry, off); 11044 11045 stub_entry->group->stub_sec->size += pad; 11046 stub_entry->stub_offset = stub_entry->group->stub_sec->size; 11047 loc += pad; 11048 } 11049 11050 r = NULL; 11051 if (info->emitrelocations) 11052 { 11053 r = get_relocs (stub_entry->group->stub_sec, 11054 ((PPC_HA (off) != 0) 11055 + (htab->opd_abi 11056 ? 2 + (htab->params->plt_static_chain 11057 && PPC_HA (off + 16) == PPC_HA (off)) 11058 : 1))); 11059 if (r == NULL) 11060 return FALSE; 11061 r[0].r_offset = loc - stub_entry->group->stub_sec->contents; 11062 if (bfd_big_endian (info->output_bfd)) 11063 r[0].r_offset += 2; 11064 r[0].r_addend = dest; 11065 } 11066 if (stub_entry->h != NULL 11067 && (stub_entry->h == htab->tls_get_addr_fd 11068 || stub_entry->h == htab->tls_get_addr) 11069 && htab->params->tls_get_addr_opt) 11070 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r); 11071 else 11072 p = build_plt_stub (htab, stub_entry, loc, off, r); 11073 size = p - loc; 11074 break; 11075 11076 case ppc_stub_save_res: 11077 return TRUE; 11078 11079 default: 11080 BFD_FAIL (); 11081 return FALSE; 11082 } 11083 11084 stub_entry->group->stub_sec->size += size; 11085 11086 if (htab->params->emit_stub_syms) 11087 { 11088 struct elf_link_hash_entry *h; 11089 size_t len1, len2; 11090 char *name; 11091 const char *const stub_str[] = { "long_branch", 11092 "long_branch_r2off", 11093 "plt_branch", 11094 "plt_branch_r2off", 11095 "plt_call", 11096 "plt_call" }; 11097 11098 len1 = strlen (stub_str[stub_entry->stub_type - 1]); 11099 len2 = strlen (stub_entry->root.string); 11100 name = bfd_malloc (len1 + len2 + 2); 11101 if (name == NULL) 11102 return FALSE; 11103 memcpy (name, stub_entry->root.string, 9); 11104 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1); 11105 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); 11106 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 11107 if (h == NULL) 11108 return FALSE; 11109 if (h->root.type == bfd_link_hash_new) 11110 { 11111 h->root.type = bfd_link_hash_defined; 11112 h->root.u.def.section = stub_entry->group->stub_sec; 11113 h->root.u.def.value = stub_entry->stub_offset; 11114 h->ref_regular = 1; 11115 h->def_regular = 1; 11116 h->ref_regular_nonweak = 1; 11117 h->forced_local = 1; 11118 h->non_elf = 0; 11119 h->root.linker_def = 1; 11120 } 11121 } 11122 11123 return TRUE; 11124} 11125 11126/* As above, but don't actually build the stub. Just bump offset so 11127 we know stub section sizes, and select plt_branch stubs where 11128 long_branch stubs won't do. */ 11129 11130static bfd_boolean 11131ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 11132{ 11133 struct ppc_stub_hash_entry *stub_entry; 11134 struct bfd_link_info *info; 11135 struct ppc_link_hash_table *htab; 11136 bfd_vma off; 11137 int size; 11138 11139 /* Massage our args to the form they really have. */ 11140 stub_entry = (struct ppc_stub_hash_entry *) gen_entry; 11141 info = in_arg; 11142 11143 htab = ppc_hash_table (info); 11144 if (htab == NULL) 11145 return FALSE; 11146 11147 if (stub_entry->h != NULL 11148 && stub_entry->h->save_res 11149 && stub_entry->h->elf.root.type == bfd_link_hash_defined 11150 && stub_entry->h->elf.root.u.def.section == htab->sfpr) 11151 { 11152 /* Don't make stubs to out-of-line register save/restore 11153 functions. Instead, emit copies of the functions. */ 11154 stub_entry->group->needs_save_res = 1; 11155 stub_entry->stub_type = ppc_stub_save_res; 11156 return TRUE; 11157 } 11158 11159 if (stub_entry->stub_type == ppc_stub_plt_call 11160 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 11161 { 11162 asection *plt; 11163 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1; 11164 if (off >= (bfd_vma) -2) 11165 abort (); 11166 plt = htab->elf.splt; 11167 if (!htab->elf.dynamic_sections_created 11168 || stub_entry->h == NULL 11169 || stub_entry->h->elf.dynindx == -1) 11170 plt = htab->elf.iplt; 11171 off += (plt->output_offset 11172 + plt->output_section->vma 11173 - elf_gp (plt->output_section->owner) 11174 - htab->sec_info[stub_entry->group->link_sec->id].toc_off); 11175 11176 size = plt_stub_size (htab, stub_entry, off); 11177 if (htab->params->plt_stub_align) 11178 size += plt_stub_pad (htab, stub_entry, off); 11179 if (info->emitrelocations) 11180 { 11181 stub_entry->group->stub_sec->reloc_count 11182 += ((PPC_HA (off) != 0) 11183 + (htab->opd_abi 11184 ? 2 + (htab->params->plt_static_chain 11185 && PPC_HA (off + 16) == PPC_HA (off)) 11186 : 1)); 11187 stub_entry->group->stub_sec->flags |= SEC_RELOC; 11188 } 11189 } 11190 else 11191 { 11192 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off 11193 variants. */ 11194 bfd_vma r2off = 0; 11195 bfd_vma local_off = 0; 11196 11197 off = (stub_entry->target_value 11198 + stub_entry->target_section->output_offset 11199 + stub_entry->target_section->output_section->vma); 11200 off -= (stub_entry->group->stub_sec->size 11201 + stub_entry->group->stub_sec->output_offset 11202 + stub_entry->group->stub_sec->output_section->vma); 11203 11204 /* Reset the stub type from the plt variant in case we now 11205 can reach with a shorter stub. */ 11206 if (stub_entry->stub_type >= ppc_stub_plt_branch) 11207 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; 11208 11209 size = 4; 11210 if (stub_entry->stub_type == ppc_stub_long_branch_r2off) 11211 { 11212 r2off = get_r2off (info, stub_entry); 11213 if (r2off == (bfd_vma) -1) 11214 { 11215 htab->stub_error = TRUE; 11216 return FALSE; 11217 } 11218 size = 8; 11219 if (PPC_HA (r2off) != 0) 11220 size += 4; 11221 if (PPC_LO (r2off) != 0) 11222 size += 4; 11223 off -= size - 4; 11224 } 11225 11226 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); 11227 11228 /* If the branch offset if too big, use a ppc_stub_plt_branch. 11229 Do the same for -R objects without function descriptors. */ 11230 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off 11231 || (stub_entry->stub_type == ppc_stub_long_branch_r2off 11232 && r2off == 0 11233 && htab->sec_info[stub_entry->target_section->id].toc_off == 0)) 11234 { 11235 struct ppc_branch_hash_entry *br_entry; 11236 11237 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, 11238 stub_entry->root.string + 9, 11239 TRUE, FALSE); 11240 if (br_entry == NULL) 11241 { 11242 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"), 11243 stub_entry->root.string); 11244 htab->stub_error = TRUE; 11245 return FALSE; 11246 } 11247 11248 if (br_entry->iter != htab->stub_iteration) 11249 { 11250 br_entry->iter = htab->stub_iteration; 11251 br_entry->offset = htab->brlt->size; 11252 htab->brlt->size += 8; 11253 11254 if (htab->relbrlt != NULL) 11255 htab->relbrlt->size += sizeof (Elf64_External_Rela); 11256 else if (info->emitrelocations) 11257 { 11258 htab->brlt->reloc_count += 1; 11259 htab->brlt->flags |= SEC_RELOC; 11260 } 11261 } 11262 11263 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; 11264 off = (br_entry->offset 11265 + htab->brlt->output_offset 11266 + htab->brlt->output_section->vma 11267 - elf_gp (htab->brlt->output_section->owner) 11268 - htab->sec_info[stub_entry->group->link_sec->id].toc_off); 11269 11270 if (info->emitrelocations) 11271 { 11272 stub_entry->group->stub_sec->reloc_count 11273 += 1 + (PPC_HA (off) != 0); 11274 stub_entry->group->stub_sec->flags |= SEC_RELOC; 11275 } 11276 11277 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) 11278 { 11279 size = 12; 11280 if (PPC_HA (off) != 0) 11281 size = 16; 11282 } 11283 else 11284 { 11285 size = 16; 11286 if (PPC_HA (off) != 0) 11287 size += 4; 11288 11289 if (PPC_HA (r2off) != 0) 11290 size += 4; 11291 if (PPC_LO (r2off) != 0) 11292 size += 4; 11293 } 11294 } 11295 else if (info->emitrelocations) 11296 { 11297 stub_entry->group->stub_sec->reloc_count += 1; 11298 stub_entry->group->stub_sec->flags |= SEC_RELOC; 11299 } 11300 } 11301 11302 stub_entry->group->stub_sec->size += size; 11303 return TRUE; 11304} 11305 11306/* Set up various things so that we can make a list of input sections 11307 for each output section included in the link. Returns -1 on error, 11308 0 when no stubs will be needed, and 1 on success. */ 11309 11310int 11311ppc64_elf_setup_section_lists (struct bfd_link_info *info) 11312{ 11313 unsigned int id; 11314 bfd_size_type amt; 11315 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11316 11317 if (htab == NULL) 11318 return -1; 11319 11320 htab->sec_info_arr_size = bfd_get_next_section_id (); 11321 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size); 11322 htab->sec_info = bfd_zmalloc (amt); 11323 if (htab->sec_info == NULL) 11324 return -1; 11325 11326 /* Set toc_off for com, und, abs and ind sections. */ 11327 for (id = 0; id < 3; id++) 11328 htab->sec_info[id].toc_off = TOC_BASE_OFF; 11329 11330 return 1; 11331} 11332 11333/* Set up for first pass at multitoc partitioning. */ 11334 11335void 11336ppc64_elf_start_multitoc_partition (struct bfd_link_info *info) 11337{ 11338 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11339 11340 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd); 11341 htab->toc_bfd = NULL; 11342 htab->toc_first_sec = NULL; 11343} 11344 11345/* The linker repeatedly calls this function for each TOC input section 11346 and linker generated GOT section. Group input bfds such that the toc 11347 within a group is less than 64k in size. */ 11348 11349bfd_boolean 11350ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) 11351{ 11352 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11353 bfd_vma addr, off, limit; 11354 11355 if (htab == NULL) 11356 return FALSE; 11357 11358 if (!htab->second_toc_pass) 11359 { 11360 /* Keep track of the first .toc or .got section for this input bfd. */ 11361 bfd_boolean new_bfd = htab->toc_bfd != isec->owner; 11362 11363 if (new_bfd) 11364 { 11365 htab->toc_bfd = isec->owner; 11366 htab->toc_first_sec = isec; 11367 } 11368 11369 addr = isec->output_offset + isec->output_section->vma; 11370 off = addr - htab->toc_curr; 11371 limit = 0x80008000; 11372 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc) 11373 limit = 0x10000; 11374 if (off + isec->size > limit) 11375 { 11376 addr = (htab->toc_first_sec->output_offset 11377 + htab->toc_first_sec->output_section->vma); 11378 htab->toc_curr = addr; 11379 htab->toc_curr &= -TOC_BASE_ALIGN; 11380 } 11381 11382 /* toc_curr is the base address of this toc group. Set elf_gp 11383 for the input section to be the offset relative to the 11384 output toc base plus 0x8000. Making the input elf_gp an 11385 offset allows us to move the toc as a whole without 11386 recalculating input elf_gp. */ 11387 off = htab->toc_curr - elf_gp (isec->output_section->owner); 11388 off += TOC_BASE_OFF; 11389 11390 /* Die if someone uses a linker script that doesn't keep input 11391 file .toc and .got together. */ 11392 if (new_bfd 11393 && elf_gp (isec->owner) != 0 11394 && elf_gp (isec->owner) != off) 11395 return FALSE; 11396 11397 elf_gp (isec->owner) = off; 11398 return TRUE; 11399 } 11400 11401 /* During the second pass toc_first_sec points to the start of 11402 a toc group, and toc_curr is used to track the old elf_gp. 11403 We use toc_bfd to ensure we only look at each bfd once. */ 11404 if (htab->toc_bfd == isec->owner) 11405 return TRUE; 11406 htab->toc_bfd = isec->owner; 11407 11408 if (htab->toc_first_sec == NULL 11409 || htab->toc_curr != elf_gp (isec->owner)) 11410 { 11411 htab->toc_curr = elf_gp (isec->owner); 11412 htab->toc_first_sec = isec; 11413 } 11414 addr = (htab->toc_first_sec->output_offset 11415 + htab->toc_first_sec->output_section->vma); 11416 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF; 11417 elf_gp (isec->owner) = off; 11418 11419 return TRUE; 11420} 11421 11422/* Called via elf_link_hash_traverse to merge GOT entries for global 11423 symbol H. */ 11424 11425static bfd_boolean 11426merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) 11427{ 11428 if (h->root.type == bfd_link_hash_indirect) 11429 return TRUE; 11430 11431 merge_got_entries (&h->got.glist); 11432 11433 return TRUE; 11434} 11435 11436/* Called via elf_link_hash_traverse to allocate GOT entries for global 11437 symbol H. */ 11438 11439static bfd_boolean 11440reallocate_got (struct elf_link_hash_entry *h, void *inf) 11441{ 11442 struct got_entry *gent; 11443 11444 if (h->root.type == bfd_link_hash_indirect) 11445 return TRUE; 11446 11447 for (gent = h->got.glist; gent != NULL; gent = gent->next) 11448 if (!gent->is_indirect) 11449 allocate_got (h, (struct bfd_link_info *) inf, gent); 11450 return TRUE; 11451} 11452 11453/* Called on the first multitoc pass after the last call to 11454 ppc64_elf_next_toc_section. This function removes duplicate GOT 11455 entries. */ 11456 11457bfd_boolean 11458ppc64_elf_layout_multitoc (struct bfd_link_info *info) 11459{ 11460 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11461 struct bfd *ibfd, *ibfd2; 11462 bfd_boolean done_something; 11463 11464 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd); 11465 11466 if (!htab->do_multi_toc) 11467 return FALSE; 11468 11469 /* Merge global sym got entries within a toc group. */ 11470 elf_link_hash_traverse (&htab->elf, merge_global_got, info); 11471 11472 /* And tlsld_got. */ 11473 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 11474 { 11475 struct got_entry *ent, *ent2; 11476 11477 if (!is_ppc64_elf (ibfd)) 11478 continue; 11479 11480 ent = ppc64_tlsld_got (ibfd); 11481 if (!ent->is_indirect 11482 && ent->got.offset != (bfd_vma) -1) 11483 { 11484 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next) 11485 { 11486 if (!is_ppc64_elf (ibfd2)) 11487 continue; 11488 11489 ent2 = ppc64_tlsld_got (ibfd2); 11490 if (!ent2->is_indirect 11491 && ent2->got.offset != (bfd_vma) -1 11492 && elf_gp (ibfd2) == elf_gp (ibfd)) 11493 { 11494 ent2->is_indirect = TRUE; 11495 ent2->got.ent = ent; 11496 } 11497 } 11498 } 11499 } 11500 11501 /* Zap sizes of got sections. */ 11502 htab->elf.irelplt->rawsize = htab->elf.irelplt->size; 11503 htab->elf.irelplt->size -= htab->got_reli_size; 11504 htab->got_reli_size = 0; 11505 11506 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 11507 { 11508 asection *got, *relgot; 11509 11510 if (!is_ppc64_elf (ibfd)) 11511 continue; 11512 11513 got = ppc64_elf_tdata (ibfd)->got; 11514 if (got != NULL) 11515 { 11516 got->rawsize = got->size; 11517 got->size = 0; 11518 relgot = ppc64_elf_tdata (ibfd)->relgot; 11519 relgot->rawsize = relgot->size; 11520 relgot->size = 0; 11521 } 11522 } 11523 11524 /* Now reallocate the got, local syms first. We don't need to 11525 allocate section contents again since we never increase size. */ 11526 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 11527 { 11528 struct got_entry **lgot_ents; 11529 struct got_entry **end_lgot_ents; 11530 struct plt_entry **local_plt; 11531 struct plt_entry **end_local_plt; 11532 unsigned char *lgot_masks; 11533 bfd_size_type locsymcount; 11534 Elf_Internal_Shdr *symtab_hdr; 11535 asection *s; 11536 11537 if (!is_ppc64_elf (ibfd)) 11538 continue; 11539 11540 lgot_ents = elf_local_got_ents (ibfd); 11541 if (!lgot_ents) 11542 continue; 11543 11544 symtab_hdr = &elf_symtab_hdr (ibfd); 11545 locsymcount = symtab_hdr->sh_info; 11546 end_lgot_ents = lgot_ents + locsymcount; 11547 local_plt = (struct plt_entry **) end_lgot_ents; 11548 end_local_plt = local_plt + locsymcount; 11549 lgot_masks = (unsigned char *) end_local_plt; 11550 s = ppc64_elf_tdata (ibfd)->got; 11551 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) 11552 { 11553 struct got_entry *ent; 11554 11555 for (ent = *lgot_ents; ent != NULL; ent = ent->next) 11556 { 11557 unsigned int ent_size = 8; 11558 unsigned int rel_size = sizeof (Elf64_External_Rela); 11559 11560 ent->got.offset = s->size; 11561 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) 11562 { 11563 ent_size *= 2; 11564 rel_size *= 2; 11565 } 11566 s->size += ent_size; 11567 if ((*lgot_masks & PLT_IFUNC) != 0) 11568 { 11569 htab->elf.irelplt->size += rel_size; 11570 htab->got_reli_size += rel_size; 11571 } 11572 else if (bfd_link_pic (info)) 11573 { 11574 asection *srel = ppc64_elf_tdata (ibfd)->relgot; 11575 srel->size += rel_size; 11576 } 11577 } 11578 } 11579 } 11580 11581 elf_link_hash_traverse (&htab->elf, reallocate_got, info); 11582 11583 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 11584 { 11585 struct got_entry *ent; 11586 11587 if (!is_ppc64_elf (ibfd)) 11588 continue; 11589 11590 ent = ppc64_tlsld_got (ibfd); 11591 if (!ent->is_indirect 11592 && ent->got.offset != (bfd_vma) -1) 11593 { 11594 asection *s = ppc64_elf_tdata (ibfd)->got; 11595 ent->got.offset = s->size; 11596 s->size += 16; 11597 if (bfd_link_pic (info)) 11598 { 11599 asection *srel = ppc64_elf_tdata (ibfd)->relgot; 11600 srel->size += sizeof (Elf64_External_Rela); 11601 } 11602 } 11603 } 11604 11605 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size; 11606 if (!done_something) 11607 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 11608 { 11609 asection *got; 11610 11611 if (!is_ppc64_elf (ibfd)) 11612 continue; 11613 11614 got = ppc64_elf_tdata (ibfd)->got; 11615 if (got != NULL) 11616 { 11617 done_something = got->rawsize != got->size; 11618 if (done_something) 11619 break; 11620 } 11621 } 11622 11623 if (done_something) 11624 (*htab->params->layout_sections_again) (); 11625 11626 /* Set up for second pass over toc sections to recalculate elf_gp 11627 on input sections. */ 11628 htab->toc_bfd = NULL; 11629 htab->toc_first_sec = NULL; 11630 htab->second_toc_pass = TRUE; 11631 return done_something; 11632} 11633 11634/* Called after second pass of multitoc partitioning. */ 11635 11636void 11637ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info) 11638{ 11639 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11640 11641 /* After the second pass, toc_curr tracks the TOC offset used 11642 for code sections below in ppc64_elf_next_input_section. */ 11643 htab->toc_curr = TOC_BASE_OFF; 11644} 11645 11646/* No toc references were found in ISEC. If the code in ISEC makes no 11647 calls, then there's no need to use toc adjusting stubs when branching 11648 into ISEC. Actually, indirect calls from ISEC are OK as they will 11649 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub 11650 needed, and 2 if a cyclical call-graph was found but no other reason 11651 for a stub was detected. If called from the top level, a return of 11652 2 means the same as a return of 0. */ 11653 11654static int 11655toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) 11656{ 11657 int ret; 11658 11659 /* Mark this section as checked. */ 11660 isec->call_check_done = 1; 11661 11662 /* We know none of our code bearing sections will need toc stubs. */ 11663 if ((isec->flags & SEC_LINKER_CREATED) != 0) 11664 return 0; 11665 11666 if (isec->size == 0) 11667 return 0; 11668 11669 if (isec->output_section == NULL) 11670 return 0; 11671 11672 ret = 0; 11673 if (isec->reloc_count != 0) 11674 { 11675 Elf_Internal_Rela *relstart, *rel; 11676 Elf_Internal_Sym *local_syms; 11677 struct ppc_link_hash_table *htab; 11678 11679 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, 11680 info->keep_memory); 11681 if (relstart == NULL) 11682 return -1; 11683 11684 /* Look for branches to outside of this section. */ 11685 local_syms = NULL; 11686 htab = ppc_hash_table (info); 11687 if (htab == NULL) 11688 return -1; 11689 11690 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) 11691 { 11692 enum elf_ppc64_reloc_type r_type; 11693 unsigned long r_symndx; 11694 struct elf_link_hash_entry *h; 11695 struct ppc_link_hash_entry *eh; 11696 Elf_Internal_Sym *sym; 11697 asection *sym_sec; 11698 struct _opd_sec_data *opd; 11699 bfd_vma sym_value; 11700 bfd_vma dest; 11701 11702 r_type = ELF64_R_TYPE (rel->r_info); 11703 if (r_type != R_PPC64_REL24 11704 && r_type != R_PPC64_REL14 11705 && r_type != R_PPC64_REL14_BRTAKEN 11706 && r_type != R_PPC64_REL14_BRNTAKEN) 11707 continue; 11708 11709 r_symndx = ELF64_R_SYM (rel->r_info); 11710 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, 11711 isec->owner)) 11712 { 11713 ret = -1; 11714 break; 11715 } 11716 11717 /* Calls to dynamic lib functions go through a plt call stub 11718 that uses r2. */ 11719 eh = (struct ppc_link_hash_entry *) h; 11720 if (eh != NULL 11721 && (eh->elf.plt.plist != NULL 11722 || (eh->oh != NULL 11723 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL))) 11724 { 11725 ret = 1; 11726 break; 11727 } 11728 11729 if (sym_sec == NULL) 11730 /* Ignore other undefined symbols. */ 11731 continue; 11732 11733 /* Assume branches to other sections not included in the 11734 link need stubs too, to cover -R and absolute syms. */ 11735 if (sym_sec->output_section == NULL) 11736 { 11737 ret = 1; 11738 break; 11739 } 11740 11741 if (h == NULL) 11742 sym_value = sym->st_value; 11743 else 11744 { 11745 if (h->root.type != bfd_link_hash_defined 11746 && h->root.type != bfd_link_hash_defweak) 11747 abort (); 11748 sym_value = h->root.u.def.value; 11749 } 11750 sym_value += rel->r_addend; 11751 11752 /* If this branch reloc uses an opd sym, find the code section. */ 11753 opd = get_opd_info (sym_sec); 11754 if (opd != NULL) 11755 { 11756 if (h == NULL && opd->adjust != NULL) 11757 { 11758 long adjust; 11759 11760 adjust = opd->adjust[OPD_NDX (sym_value)]; 11761 if (adjust == -1) 11762 /* Assume deleted functions won't ever be called. */ 11763 continue; 11764 sym_value += adjust; 11765 } 11766 11767 dest = opd_entry_value (sym_sec, sym_value, 11768 &sym_sec, NULL, FALSE); 11769 if (dest == (bfd_vma) -1) 11770 continue; 11771 } 11772 else 11773 dest = (sym_value 11774 + sym_sec->output_offset 11775 + sym_sec->output_section->vma); 11776 11777 /* Ignore branch to self. */ 11778 if (sym_sec == isec) 11779 continue; 11780 11781 /* If the called function uses the toc, we need a stub. */ 11782 if (sym_sec->has_toc_reloc 11783 || sym_sec->makes_toc_func_call) 11784 { 11785 ret = 1; 11786 break; 11787 } 11788 11789 /* Assume any branch that needs a long branch stub might in fact 11790 need a plt_branch stub. A plt_branch stub uses r2. */ 11791 else if (dest - (isec->output_offset 11792 + isec->output_section->vma 11793 + rel->r_offset) + (1 << 25) 11794 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h 11795 ? h->other 11796 : sym->st_other)) 11797 { 11798 ret = 1; 11799 break; 11800 } 11801 11802 /* If calling back to a section in the process of being 11803 tested, we can't say for sure that no toc adjusting stubs 11804 are needed, so don't return zero. */ 11805 else if (sym_sec->call_check_in_progress) 11806 ret = 2; 11807 11808 /* Branches to another section that itself doesn't have any TOC 11809 references are OK. Recursively call ourselves to check. */ 11810 else if (!sym_sec->call_check_done) 11811 { 11812 int recur; 11813 11814 /* Mark current section as indeterminate, so that other 11815 sections that call back to current won't be marked as 11816 known. */ 11817 isec->call_check_in_progress = 1; 11818 recur = toc_adjusting_stub_needed (info, sym_sec); 11819 isec->call_check_in_progress = 0; 11820 11821 if (recur != 0) 11822 { 11823 ret = recur; 11824 if (recur != 2) 11825 break; 11826 } 11827 } 11828 } 11829 11830 if (local_syms != NULL 11831 && (elf_symtab_hdr (isec->owner).contents 11832 != (unsigned char *) local_syms)) 11833 free (local_syms); 11834 if (elf_section_data (isec)->relocs != relstart) 11835 free (relstart); 11836 } 11837 11838 if ((ret & 1) == 0 11839 && isec->map_head.s != NULL 11840 && (strcmp (isec->output_section->name, ".init") == 0 11841 || strcmp (isec->output_section->name, ".fini") == 0)) 11842 { 11843 if (isec->map_head.s->has_toc_reloc 11844 || isec->map_head.s->makes_toc_func_call) 11845 ret = 1; 11846 else if (!isec->map_head.s->call_check_done) 11847 { 11848 int recur; 11849 isec->call_check_in_progress = 1; 11850 recur = toc_adjusting_stub_needed (info, isec->map_head.s); 11851 isec->call_check_in_progress = 0; 11852 if (recur != 0) 11853 ret = recur; 11854 } 11855 } 11856 11857 if (ret == 1) 11858 isec->makes_toc_func_call = 1; 11859 11860 return ret; 11861} 11862 11863/* The linker repeatedly calls this function for each input section, 11864 in the order that input sections are linked into output sections. 11865 Build lists of input sections to determine groupings between which 11866 we may insert linker stubs. */ 11867 11868bfd_boolean 11869ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) 11870{ 11871 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11872 11873 if (htab == NULL) 11874 return FALSE; 11875 11876 if ((isec->output_section->flags & SEC_CODE) != 0 11877 && isec->output_section->id < htab->sec_info_arr_size) 11878 { 11879 /* This happens to make the list in reverse order, 11880 which is what we want. */ 11881 htab->sec_info[isec->id].u.list 11882 = htab->sec_info[isec->output_section->id].u.list; 11883 htab->sec_info[isec->output_section->id].u.list = isec; 11884 } 11885 11886 if (htab->multi_toc_needed) 11887 { 11888 /* Analyse sections that aren't already flagged as needing a 11889 valid toc pointer. Exclude .fixup for the linux kernel. 11890 .fixup contains branches, but only back to the function that 11891 hit an exception. */ 11892 if (!(isec->has_toc_reloc 11893 || (isec->flags & SEC_CODE) == 0 11894 || strcmp (isec->name, ".fixup") == 0 11895 || isec->call_check_done)) 11896 { 11897 if (toc_adjusting_stub_needed (info, isec) < 0) 11898 return FALSE; 11899 } 11900 /* Make all sections use the TOC assigned for this object file. 11901 This will be wrong for pasted sections; We fix that in 11902 check_pasted_section(). */ 11903 if (elf_gp (isec->owner) != 0) 11904 htab->toc_curr = elf_gp (isec->owner); 11905 } 11906 11907 htab->sec_info[isec->id].toc_off = htab->toc_curr; 11908 return TRUE; 11909} 11910 11911/* Check that all .init and .fini sections use the same toc, if they 11912 have toc relocs. */ 11913 11914static bfd_boolean 11915check_pasted_section (struct bfd_link_info *info, const char *name) 11916{ 11917 asection *o = bfd_get_section_by_name (info->output_bfd, name); 11918 11919 if (o != NULL) 11920 { 11921 struct ppc_link_hash_table *htab = ppc_hash_table (info); 11922 bfd_vma toc_off = 0; 11923 asection *i; 11924 11925 for (i = o->map_head.s; i != NULL; i = i->map_head.s) 11926 if (i->has_toc_reloc) 11927 { 11928 if (toc_off == 0) 11929 toc_off = htab->sec_info[i->id].toc_off; 11930 else if (toc_off != htab->sec_info[i->id].toc_off) 11931 return FALSE; 11932 } 11933 11934 if (toc_off == 0) 11935 for (i = o->map_head.s; i != NULL; i = i->map_head.s) 11936 if (i->makes_toc_func_call) 11937 { 11938 toc_off = htab->sec_info[i->id].toc_off; 11939 break; 11940 } 11941 11942 /* Make sure the whole pasted function uses the same toc offset. */ 11943 if (toc_off != 0) 11944 for (i = o->map_head.s; i != NULL; i = i->map_head.s) 11945 htab->sec_info[i->id].toc_off = toc_off; 11946 } 11947 return TRUE; 11948} 11949 11950bfd_boolean 11951ppc64_elf_check_init_fini (struct bfd_link_info *info) 11952{ 11953 return (check_pasted_section (info, ".init") 11954 & check_pasted_section (info, ".fini")); 11955} 11956 11957/* See whether we can group stub sections together. Grouping stub 11958 sections may result in fewer stubs. More importantly, we need to 11959 put all .init* and .fini* stubs at the beginning of the .init or 11960 .fini output sections respectively, because glibc splits the 11961 _init and _fini functions into multiple parts. Putting a stub in 11962 the middle of a function is not a good idea. */ 11963 11964static bfd_boolean 11965group_sections (struct bfd_link_info *info, 11966 bfd_size_type stub_group_size, 11967 bfd_boolean stubs_always_before_branch) 11968{ 11969 struct ppc_link_hash_table *htab; 11970 asection *osec; 11971 bfd_size_type stub14_group_size; 11972 bfd_boolean suppress_size_errors; 11973 11974 htab = ppc_hash_table (info); 11975 if (htab == NULL) 11976 return FALSE; 11977 11978 suppress_size_errors = FALSE; 11979 stub14_group_size = stub_group_size >> 10; 11980 if (stub_group_size == 1) 11981 { 11982 /* Default values. */ 11983 if (stubs_always_before_branch) 11984 { 11985 stub_group_size = 0x1e00000; 11986 stub14_group_size = 0x7800; 11987 } 11988 else 11989 { 11990 stub_group_size = 0x1c00000; 11991 stub14_group_size = 0x7000; 11992 } 11993 suppress_size_errors = TRUE; 11994 } 11995 11996 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next) 11997 { 11998 asection *tail; 11999 12000 if (osec->id >= htab->sec_info_arr_size) 12001 continue; 12002 12003 tail = htab->sec_info[osec->id].u.list; 12004 while (tail != NULL) 12005 { 12006 asection *curr; 12007 asection *prev; 12008 bfd_size_type total; 12009 bfd_boolean big_sec; 12010 bfd_vma curr_toc; 12011 struct map_stub *group; 12012 12013 curr = tail; 12014 total = tail->size; 12015 big_sec = total > (ppc64_elf_section_data (tail) != NULL 12016 && ppc64_elf_section_data (tail)->has_14bit_branch 12017 ? stub14_group_size : stub_group_size); 12018 if (big_sec && !suppress_size_errors) 12019 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"), 12020 tail->owner, tail); 12021 curr_toc = htab->sec_info[tail->id].toc_off; 12022 12023 while ((prev = htab->sec_info[curr->id].u.list) != NULL 12024 && ((total += curr->output_offset - prev->output_offset) 12025 < (ppc64_elf_section_data (prev) != NULL 12026 && ppc64_elf_section_data (prev)->has_14bit_branch 12027 ? stub14_group_size : stub_group_size)) 12028 && htab->sec_info[prev->id].toc_off == curr_toc) 12029 curr = prev; 12030 12031 /* OK, the size from the start of CURR to the end is less 12032 than stub_group_size and thus can be handled by one stub 12033 section. (or the tail section is itself larger than 12034 stub_group_size, in which case we may be toast.) We 12035 should really be keeping track of the total size of stubs 12036 added here, as stubs contribute to the final output 12037 section size. That's a little tricky, and this way will 12038 only break if stubs added make the total size more than 12039 2^25, ie. for the default stub_group_size, if stubs total 12040 more than 2097152 bytes, or nearly 75000 plt call stubs. */ 12041 group = bfd_alloc (curr->owner, sizeof (*group)); 12042 if (group == NULL) 12043 return FALSE; 12044 group->link_sec = curr; 12045 group->stub_sec = NULL; 12046 group->needs_save_res = 0; 12047 group->next = htab->group; 12048 htab->group = group; 12049 do 12050 { 12051 prev = htab->sec_info[tail->id].u.list; 12052 /* Set up this stub group. */ 12053 htab->sec_info[tail->id].u.group = group; 12054 } 12055 while (tail != curr && (tail = prev) != NULL); 12056 12057 /* But wait, there's more! Input sections up to stub_group_size 12058 bytes before the stub section can be handled by it too. 12059 Don't do this if we have a really large section after the 12060 stubs, as adding more stubs increases the chance that 12061 branches may not reach into the stub section. */ 12062 if (!stubs_always_before_branch && !big_sec) 12063 { 12064 total = 0; 12065 while (prev != NULL 12066 && ((total += tail->output_offset - prev->output_offset) 12067 < (ppc64_elf_section_data (prev) != NULL 12068 && ppc64_elf_section_data (prev)->has_14bit_branch 12069 ? stub14_group_size : stub_group_size)) 12070 && htab->sec_info[prev->id].toc_off == curr_toc) 12071 { 12072 tail = prev; 12073 prev = htab->sec_info[tail->id].u.list; 12074 htab->sec_info[tail->id].u.group = group; 12075 } 12076 } 12077 tail = prev; 12078 } 12079 } 12080 return TRUE; 12081} 12082 12083static const unsigned char glink_eh_frame_cie[] = 12084{ 12085 0, 0, 0, 16, /* length. */ 12086 0, 0, 0, 0, /* id. */ 12087 1, /* CIE version. */ 12088 'z', 'R', 0, /* Augmentation string. */ 12089 4, /* Code alignment. */ 12090 0x78, /* Data alignment. */ 12091 65, /* RA reg. */ 12092 1, /* Augmentation size. */ 12093 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 12094 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */ 12095 0, 0, 0, 0 12096}; 12097 12098/* Stripping output sections is normally done before dynamic section 12099 symbols have been allocated. This function is called later, and 12100 handles cases like htab->brlt which is mapped to its own output 12101 section. */ 12102 12103static void 12104maybe_strip_output (struct bfd_link_info *info, asection *isec) 12105{ 12106 if (isec->size == 0 12107 && isec->output_section->size == 0 12108 && !(isec->output_section->flags & SEC_KEEP) 12109 && !bfd_section_removed_from_list (info->output_bfd, 12110 isec->output_section) 12111 && elf_section_data (isec->output_section)->dynindx == 0) 12112 { 12113 isec->output_section->flags |= SEC_EXCLUDE; 12114 bfd_section_list_remove (info->output_bfd, isec->output_section); 12115 info->output_bfd->section_count--; 12116 } 12117} 12118 12119/* Determine and set the size of the stub section for a final link. 12120 12121 The basic idea here is to examine all the relocations looking for 12122 PC-relative calls to a target that is unreachable with a "bl" 12123 instruction. */ 12124 12125bfd_boolean 12126ppc64_elf_size_stubs (struct bfd_link_info *info) 12127{ 12128 bfd_size_type stub_group_size; 12129 bfd_boolean stubs_always_before_branch; 12130 struct ppc_link_hash_table *htab = ppc_hash_table (info); 12131 12132 if (htab == NULL) 12133 return FALSE; 12134 12135 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info)) 12136 htab->params->plt_thread_safe = 1; 12137 if (!htab->opd_abi) 12138 htab->params->plt_thread_safe = 0; 12139 else if (htab->params->plt_thread_safe == -1) 12140 { 12141 static const char *const thread_starter[] = 12142 { 12143 "pthread_create", 12144 /* libstdc++ */ 12145 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", 12146 /* librt */ 12147 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", 12148 "mq_notify", "create_timer", 12149 /* libanl */ 12150 "getaddrinfo_a", 12151 /* libgomp */ 12152 "GOMP_parallel", 12153 "GOMP_parallel_start", 12154 "GOMP_parallel_loop_static", 12155 "GOMP_parallel_loop_static_start", 12156 "GOMP_parallel_loop_dynamic", 12157 "GOMP_parallel_loop_dynamic_start", 12158 "GOMP_parallel_loop_guided", 12159 "GOMP_parallel_loop_guided_start", 12160 "GOMP_parallel_loop_runtime", 12161 "GOMP_parallel_loop_runtime_start", 12162 "GOMP_parallel_sections", 12163 "GOMP_parallel_sections_start", 12164 /* libgo */ 12165 "__go_go", 12166 }; 12167 unsigned i; 12168 12169 for (i = 0; i < ARRAY_SIZE (thread_starter); i++) 12170 { 12171 struct elf_link_hash_entry *h; 12172 h = elf_link_hash_lookup (&htab->elf, thread_starter[i], 12173 FALSE, FALSE, TRUE); 12174 htab->params->plt_thread_safe = h != NULL && h->ref_regular; 12175 if (htab->params->plt_thread_safe) 12176 break; 12177 } 12178 } 12179 stubs_always_before_branch = htab->params->group_size < 0; 12180 if (htab->params->group_size < 0) 12181 stub_group_size = -htab->params->group_size; 12182 else 12183 stub_group_size = htab->params->group_size; 12184 12185 if (!group_sections (info, stub_group_size, stubs_always_before_branch)) 12186 return FALSE; 12187 12188#define STUB_SHRINK_ITER 20 12189 /* Loop until no stubs added. After iteration 20 of this loop we may 12190 exit on a stub section shrinking. This is to break out of a 12191 pathological case where adding stubs on one iteration decreases 12192 section gaps (perhaps due to alignment), which then requires 12193 fewer or smaller stubs on the next iteration. */ 12194 12195 while (1) 12196 { 12197 bfd *input_bfd; 12198 unsigned int bfd_indx; 12199 struct map_stub *group; 12200 asection *stub_sec; 12201 12202 htab->stub_iteration += 1; 12203 12204 for (input_bfd = info->input_bfds, bfd_indx = 0; 12205 input_bfd != NULL; 12206 input_bfd = input_bfd->link.next, bfd_indx++) 12207 { 12208 Elf_Internal_Shdr *symtab_hdr; 12209 asection *section; 12210 Elf_Internal_Sym *local_syms = NULL; 12211 12212 if (!is_ppc64_elf (input_bfd)) 12213 continue; 12214 12215 /* We'll need the symbol table in a second. */ 12216 symtab_hdr = &elf_symtab_hdr (input_bfd); 12217 if (symtab_hdr->sh_info == 0) 12218 continue; 12219 12220 /* Walk over each section attached to the input bfd. */ 12221 for (section = input_bfd->sections; 12222 section != NULL; 12223 section = section->next) 12224 { 12225 Elf_Internal_Rela *internal_relocs, *irelaend, *irela; 12226 12227 /* If there aren't any relocs, then there's nothing more 12228 to do. */ 12229 if ((section->flags & SEC_RELOC) == 0 12230 || (section->flags & SEC_ALLOC) == 0 12231 || (section->flags & SEC_LOAD) == 0 12232 || (section->flags & SEC_CODE) == 0 12233 || section->reloc_count == 0) 12234 continue; 12235 12236 /* If this section is a link-once section that will be 12237 discarded, then don't create any stubs. */ 12238 if (section->output_section == NULL 12239 || section->output_section->owner != info->output_bfd) 12240 continue; 12241 12242 /* Get the relocs. */ 12243 internal_relocs 12244 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, 12245 info->keep_memory); 12246 if (internal_relocs == NULL) 12247 goto error_ret_free_local; 12248 12249 /* Now examine each relocation. */ 12250 irela = internal_relocs; 12251 irelaend = irela + section->reloc_count; 12252 for (; irela < irelaend; irela++) 12253 { 12254 enum elf_ppc64_reloc_type r_type; 12255 unsigned int r_indx; 12256 enum ppc_stub_type stub_type; 12257 struct ppc_stub_hash_entry *stub_entry; 12258 asection *sym_sec, *code_sec; 12259 bfd_vma sym_value, code_value; 12260 bfd_vma destination; 12261 unsigned long local_off; 12262 bfd_boolean ok_dest; 12263 struct ppc_link_hash_entry *hash; 12264 struct ppc_link_hash_entry *fdh; 12265 struct elf_link_hash_entry *h; 12266 Elf_Internal_Sym *sym; 12267 char *stub_name; 12268 const asection *id_sec; 12269 struct _opd_sec_data *opd; 12270 struct plt_entry *plt_ent; 12271 12272 r_type = ELF64_R_TYPE (irela->r_info); 12273 r_indx = ELF64_R_SYM (irela->r_info); 12274 12275 if (r_type >= R_PPC64_max) 12276 { 12277 bfd_set_error (bfd_error_bad_value); 12278 goto error_ret_free_internal; 12279 } 12280 12281 /* Only look for stubs on branch instructions. */ 12282 if (r_type != R_PPC64_REL24 12283 && r_type != R_PPC64_REL14 12284 && r_type != R_PPC64_REL14_BRTAKEN 12285 && r_type != R_PPC64_REL14_BRNTAKEN) 12286 continue; 12287 12288 /* Now determine the call target, its name, value, 12289 section. */ 12290 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 12291 r_indx, input_bfd)) 12292 goto error_ret_free_internal; 12293 hash = (struct ppc_link_hash_entry *) h; 12294 12295 ok_dest = FALSE; 12296 fdh = NULL; 12297 sym_value = 0; 12298 if (hash == NULL) 12299 { 12300 sym_value = sym->st_value; 12301 if (sym_sec != NULL 12302 && sym_sec->output_section != NULL) 12303 ok_dest = TRUE; 12304 } 12305 else if (hash->elf.root.type == bfd_link_hash_defined 12306 || hash->elf.root.type == bfd_link_hash_defweak) 12307 { 12308 sym_value = hash->elf.root.u.def.value; 12309 if (sym_sec->output_section != NULL) 12310 ok_dest = TRUE; 12311 } 12312 else if (hash->elf.root.type == bfd_link_hash_undefweak 12313 || hash->elf.root.type == bfd_link_hash_undefined) 12314 { 12315 /* Recognise an old ABI func code entry sym, and 12316 use the func descriptor sym instead if it is 12317 defined. */ 12318 if (hash->elf.root.root.string[0] == '.' 12319 && (fdh = lookup_fdh (hash, htab)) != NULL) 12320 { 12321 if (fdh->elf.root.type == bfd_link_hash_defined 12322 || fdh->elf.root.type == bfd_link_hash_defweak) 12323 { 12324 sym_sec = fdh->elf.root.u.def.section; 12325 sym_value = fdh->elf.root.u.def.value; 12326 if (sym_sec->output_section != NULL) 12327 ok_dest = TRUE; 12328 } 12329 else 12330 fdh = NULL; 12331 } 12332 } 12333 else 12334 { 12335 bfd_set_error (bfd_error_bad_value); 12336 goto error_ret_free_internal; 12337 } 12338 12339 destination = 0; 12340 local_off = 0; 12341 if (ok_dest) 12342 { 12343 sym_value += irela->r_addend; 12344 destination = (sym_value 12345 + sym_sec->output_offset 12346 + sym_sec->output_section->vma); 12347 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash 12348 ? hash->elf.other 12349 : sym->st_other); 12350 } 12351 12352 code_sec = sym_sec; 12353 code_value = sym_value; 12354 opd = get_opd_info (sym_sec); 12355 if (opd != NULL) 12356 { 12357 bfd_vma dest; 12358 12359 if (hash == NULL && opd->adjust != NULL) 12360 { 12361 long adjust = opd->adjust[OPD_NDX (sym_value)]; 12362 if (adjust == -1) 12363 continue; 12364 code_value += adjust; 12365 sym_value += adjust; 12366 } 12367 dest = opd_entry_value (sym_sec, sym_value, 12368 &code_sec, &code_value, FALSE); 12369 if (dest != (bfd_vma) -1) 12370 { 12371 destination = dest; 12372 if (fdh != NULL) 12373 { 12374 /* Fixup old ABI sym to point at code 12375 entry. */ 12376 hash->elf.root.type = bfd_link_hash_defweak; 12377 hash->elf.root.u.def.section = code_sec; 12378 hash->elf.root.u.def.value = code_value; 12379 } 12380 } 12381 } 12382 12383 /* Determine what (if any) linker stub is needed. */ 12384 plt_ent = NULL; 12385 stub_type = ppc_type_of_stub (section, irela, &hash, 12386 &plt_ent, destination, 12387 local_off); 12388 12389 if (stub_type != ppc_stub_plt_call) 12390 { 12391 /* Check whether we need a TOC adjusting stub. 12392 Since the linker pastes together pieces from 12393 different object files when creating the 12394 _init and _fini functions, it may be that a 12395 call to what looks like a local sym is in 12396 fact a call needing a TOC adjustment. */ 12397 if (code_sec != NULL 12398 && code_sec->output_section != NULL 12399 && (htab->sec_info[code_sec->id].toc_off 12400 != htab->sec_info[section->id].toc_off) 12401 && (code_sec->has_toc_reloc 12402 || code_sec->makes_toc_func_call)) 12403 stub_type = ppc_stub_long_branch_r2off; 12404 } 12405 12406 if (stub_type == ppc_stub_none) 12407 continue; 12408 12409 /* __tls_get_addr calls might be eliminated. */ 12410 if (stub_type != ppc_stub_plt_call 12411 && hash != NULL 12412 && (hash == htab->tls_get_addr 12413 || hash == htab->tls_get_addr_fd) 12414 && section->has_tls_reloc 12415 && irela != internal_relocs) 12416 { 12417 /* Get tls info. */ 12418 unsigned char *tls_mask; 12419 12420 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms, 12421 irela - 1, input_bfd)) 12422 goto error_ret_free_internal; 12423 if (*tls_mask != 0) 12424 continue; 12425 } 12426 12427 if (stub_type == ppc_stub_plt_call 12428 && irela + 1 < irelaend 12429 && irela[1].r_offset == irela->r_offset + 4 12430 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE) 12431 { 12432 if (!tocsave_find (htab, INSERT, 12433 &local_syms, irela + 1, input_bfd)) 12434 goto error_ret_free_internal; 12435 } 12436 else if (stub_type == ppc_stub_plt_call) 12437 stub_type = ppc_stub_plt_call_r2save; 12438 12439 /* Support for grouping stub sections. */ 12440 id_sec = htab->sec_info[section->id].u.group->link_sec; 12441 12442 /* Get the name of this stub. */ 12443 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); 12444 if (!stub_name) 12445 goto error_ret_free_internal; 12446 12447 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, 12448 stub_name, FALSE, FALSE); 12449 if (stub_entry != NULL) 12450 { 12451 /* The proper stub has already been created. */ 12452 free (stub_name); 12453 if (stub_type == ppc_stub_plt_call_r2save) 12454 stub_entry->stub_type = stub_type; 12455 continue; 12456 } 12457 12458 stub_entry = ppc_add_stub (stub_name, section, info); 12459 if (stub_entry == NULL) 12460 { 12461 free (stub_name); 12462 error_ret_free_internal: 12463 if (elf_section_data (section)->relocs == NULL) 12464 free (internal_relocs); 12465 error_ret_free_local: 12466 if (local_syms != NULL 12467 && (symtab_hdr->contents 12468 != (unsigned char *) local_syms)) 12469 free (local_syms); 12470 return FALSE; 12471 } 12472 12473 stub_entry->stub_type = stub_type; 12474 if (stub_type != ppc_stub_plt_call 12475 && stub_type != ppc_stub_plt_call_r2save) 12476 { 12477 stub_entry->target_value = code_value; 12478 stub_entry->target_section = code_sec; 12479 } 12480 else 12481 { 12482 stub_entry->target_value = sym_value; 12483 stub_entry->target_section = sym_sec; 12484 } 12485 stub_entry->h = hash; 12486 stub_entry->plt_ent = plt_ent; 12487 stub_entry->other = hash ? hash->elf.other : sym->st_other; 12488 12489 if (stub_entry->h != NULL) 12490 htab->stub_globals += 1; 12491 } 12492 12493 /* We're done with the internal relocs, free them. */ 12494 if (elf_section_data (section)->relocs != internal_relocs) 12495 free (internal_relocs); 12496 } 12497 12498 if (local_syms != NULL 12499 && symtab_hdr->contents != (unsigned char *) local_syms) 12500 { 12501 if (!info->keep_memory) 12502 free (local_syms); 12503 else 12504 symtab_hdr->contents = (unsigned char *) local_syms; 12505 } 12506 } 12507 12508 /* We may have added some stubs. Find out the new size of the 12509 stub sections. */ 12510 for (stub_sec = htab->params->stub_bfd->sections; 12511 stub_sec != NULL; 12512 stub_sec = stub_sec->next) 12513 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 12514 { 12515 stub_sec->rawsize = stub_sec->size; 12516 stub_sec->size = 0; 12517 stub_sec->reloc_count = 0; 12518 stub_sec->flags &= ~SEC_RELOC; 12519 } 12520 12521 htab->brlt->size = 0; 12522 htab->brlt->reloc_count = 0; 12523 htab->brlt->flags &= ~SEC_RELOC; 12524 if (htab->relbrlt != NULL) 12525 htab->relbrlt->size = 0; 12526 12527 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); 12528 12529 for (group = htab->group; group != NULL; group = group->next) 12530 if (group->needs_save_res) 12531 group->stub_sec->size += htab->sfpr->size; 12532 12533 if (info->emitrelocations 12534 && htab->glink != NULL && htab->glink->size != 0) 12535 { 12536 htab->glink->reloc_count = 1; 12537 htab->glink->flags |= SEC_RELOC; 12538 } 12539 12540 if (htab->glink_eh_frame != NULL 12541 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 12542 && htab->glink_eh_frame->output_section->size != 0) 12543 { 12544 size_t size = 0, align; 12545 12546 for (stub_sec = htab->params->stub_bfd->sections; 12547 stub_sec != NULL; 12548 stub_sec = stub_sec->next) 12549 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 12550 size += 24; 12551 if (htab->glink != NULL && htab->glink->size != 0) 12552 size += 24; 12553 if (size != 0) 12554 size += sizeof (glink_eh_frame_cie); 12555 align = 1; 12556 align <<= htab->glink_eh_frame->output_section->alignment_power; 12557 align -= 1; 12558 size = (size + align) & ~align; 12559 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; 12560 htab->glink_eh_frame->size = size; 12561 } 12562 12563 if (htab->params->plt_stub_align != 0) 12564 for (stub_sec = htab->params->stub_bfd->sections; 12565 stub_sec != NULL; 12566 stub_sec = stub_sec->next) 12567 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 12568 stub_sec->size = ((stub_sec->size 12569 + (1 << htab->params->plt_stub_align) - 1) 12570 & -(1 << htab->params->plt_stub_align)); 12571 12572 for (stub_sec = htab->params->stub_bfd->sections; 12573 stub_sec != NULL; 12574 stub_sec = stub_sec->next) 12575 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 12576 && stub_sec->rawsize != stub_sec->size 12577 && (htab->stub_iteration <= STUB_SHRINK_ITER 12578 || stub_sec->rawsize < stub_sec->size)) 12579 break; 12580 12581 if (stub_sec == NULL 12582 && (htab->glink_eh_frame == NULL 12583 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size)) 12584 break; 12585 12586 /* Ask the linker to do its stuff. */ 12587 (*htab->params->layout_sections_again) (); 12588 } 12589 12590 if (htab->glink_eh_frame != NULL 12591 && htab->glink_eh_frame->size != 0) 12592 { 12593 bfd_vma val; 12594 bfd_byte *p, *last_fde; 12595 size_t last_fde_len, size, align, pad; 12596 asection *stub_sec; 12597 12598 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size); 12599 if (p == NULL) 12600 return FALSE; 12601 htab->glink_eh_frame->contents = p; 12602 last_fde = p; 12603 12604 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 12605 /* CIE length (rewrite in case little-endian). */ 12606 last_fde_len = sizeof (glink_eh_frame_cie) - 4; 12607 bfd_put_32 (htab->elf.dynobj, last_fde_len, p); 12608 p += sizeof (glink_eh_frame_cie); 12609 12610 for (stub_sec = htab->params->stub_bfd->sections; 12611 stub_sec != NULL; 12612 stub_sec = stub_sec->next) 12613 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 12614 { 12615 last_fde = p; 12616 last_fde_len = 20; 12617 /* FDE length. */ 12618 bfd_put_32 (htab->elf.dynobj, 20, p); 12619 p += 4; 12620 /* CIE pointer. */ 12621 val = p - htab->glink_eh_frame->contents; 12622 bfd_put_32 (htab->elf.dynobj, val, p); 12623 p += 4; 12624 /* Offset to stub section, written later. */ 12625 p += 4; 12626 /* stub section size. */ 12627 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p); 12628 p += 4; 12629 /* Augmentation. */ 12630 p += 1; 12631 /* Pad. */ 12632 p += 7; 12633 } 12634 if (htab->glink != NULL && htab->glink->size != 0) 12635 { 12636 last_fde = p; 12637 last_fde_len = 20; 12638 /* FDE length. */ 12639 bfd_put_32 (htab->elf.dynobj, 20, p); 12640 p += 4; 12641 /* CIE pointer. */ 12642 val = p - htab->glink_eh_frame->contents; 12643 bfd_put_32 (htab->elf.dynobj, val, p); 12644 p += 4; 12645 /* Offset to .glink, written later. */ 12646 p += 4; 12647 /* .glink size. */ 12648 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p); 12649 p += 4; 12650 /* Augmentation. */ 12651 p += 1; 12652 12653 *p++ = DW_CFA_advance_loc + 1; 12654 *p++ = DW_CFA_register; 12655 *p++ = 65; 12656 *p++ = htab->opd_abi ? 12 : 0; 12657 *p++ = DW_CFA_advance_loc + 4; 12658 *p++ = DW_CFA_restore_extended; 12659 *p++ = 65; 12660 } 12661 /* Subsume any padding into the last FDE if user .eh_frame 12662 sections are aligned more than glink_eh_frame. Otherwise any 12663 zero padding will be seen as a terminator. */ 12664 size = p - htab->glink_eh_frame->contents; 12665 align = 1; 12666 align <<= htab->glink_eh_frame->output_section->alignment_power; 12667 align -= 1; 12668 pad = ((size + align) & ~align) - size; 12669 htab->glink_eh_frame->size = size + pad; 12670 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde); 12671 } 12672 12673 maybe_strip_output (info, htab->brlt); 12674 if (htab->glink_eh_frame != NULL) 12675 maybe_strip_output (info, htab->glink_eh_frame); 12676 12677 return TRUE; 12678} 12679 12680/* Called after we have determined section placement. If sections 12681 move, we'll be called again. Provide a value for TOCstart. */ 12682 12683bfd_vma 12684ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd) 12685{ 12686 asection *s; 12687 bfd_vma TOCstart, adjust; 12688 12689 if (info != NULL) 12690 { 12691 struct elf_link_hash_entry *h; 12692 struct elf_link_hash_table *htab = elf_hash_table (info); 12693 12694 if (is_elf_hash_table (htab) 12695 && htab->hgot != NULL) 12696 h = htab->hgot; 12697 else 12698 { 12699 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE); 12700 if (is_elf_hash_table (htab)) 12701 htab->hgot = h; 12702 } 12703 if (h != NULL 12704 && h->root.type == bfd_link_hash_defined 12705 && !h->root.linker_def 12706 && (!is_elf_hash_table (htab) 12707 || h->def_regular)) 12708 { 12709 TOCstart = (h->root.u.def.value - TOC_BASE_OFF 12710 + h->root.u.def.section->output_offset 12711 + h->root.u.def.section->output_section->vma); 12712 _bfd_set_gp_value (obfd, TOCstart); 12713 return TOCstart; 12714 } 12715 } 12716 12717 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that 12718 order. The TOC starts where the first of these sections starts. */ 12719 s = bfd_get_section_by_name (obfd, ".got"); 12720 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) 12721 s = bfd_get_section_by_name (obfd, ".toc"); 12722 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) 12723 s = bfd_get_section_by_name (obfd, ".tocbss"); 12724 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) 12725 s = bfd_get_section_by_name (obfd, ".plt"); 12726 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) 12727 { 12728 /* This may happen for 12729 o references to TOC base (SYM@toc / TOC[tc0]) without a 12730 .toc directive 12731 o bad linker script 12732 o --gc-sections and empty TOC sections 12733 12734 FIXME: Warn user? */ 12735 12736 /* Look for a likely section. We probably won't even be 12737 using TOCstart. */ 12738 for (s = obfd->sections; s != NULL; s = s->next) 12739 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY 12740 | SEC_EXCLUDE)) 12741 == (SEC_ALLOC | SEC_SMALL_DATA)) 12742 break; 12743 if (s == NULL) 12744 for (s = obfd->sections; s != NULL; s = s->next) 12745 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE)) 12746 == (SEC_ALLOC | SEC_SMALL_DATA)) 12747 break; 12748 if (s == NULL) 12749 for (s = obfd->sections; s != NULL; s = s->next) 12750 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE)) 12751 == SEC_ALLOC) 12752 break; 12753 if (s == NULL) 12754 for (s = obfd->sections; s != NULL; s = s->next) 12755 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC) 12756 break; 12757 } 12758 12759 TOCstart = 0; 12760 if (s != NULL) 12761 TOCstart = s->output_section->vma + s->output_offset; 12762 12763 /* Force alignment. */ 12764 adjust = TOCstart & (TOC_BASE_ALIGN - 1); 12765 TOCstart -= adjust; 12766 _bfd_set_gp_value (obfd, TOCstart); 12767 12768 if (info != NULL && s != NULL) 12769 { 12770 struct ppc_link_hash_table *htab = ppc_hash_table (info); 12771 12772 if (htab != NULL) 12773 { 12774 if (htab->elf.hgot != NULL) 12775 { 12776 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust; 12777 htab->elf.hgot->root.u.def.section = s; 12778 } 12779 } 12780 else 12781 { 12782 struct bfd_link_hash_entry *bh = NULL; 12783 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL, 12784 s, TOC_BASE_OFF - adjust, 12785 NULL, FALSE, FALSE, &bh); 12786 } 12787 } 12788 return TOCstart; 12789} 12790 12791/* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to 12792 write out any global entry stubs. */ 12793 12794static bfd_boolean 12795build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf) 12796{ 12797 struct bfd_link_info *info; 12798 struct ppc_link_hash_table *htab; 12799 struct plt_entry *pent; 12800 asection *s; 12801 12802 if (h->root.type == bfd_link_hash_indirect) 12803 return TRUE; 12804 12805 if (!h->pointer_equality_needed) 12806 return TRUE; 12807 12808 if (h->def_regular) 12809 return TRUE; 12810 12811 info = inf; 12812 htab = ppc_hash_table (info); 12813 if (htab == NULL) 12814 return FALSE; 12815 12816 s = htab->glink; 12817 for (pent = h->plt.plist; pent != NULL; pent = pent->next) 12818 if (pent->plt.offset != (bfd_vma) -1 12819 && pent->addend == 0) 12820 { 12821 bfd_byte *p; 12822 asection *plt; 12823 bfd_vma off; 12824 12825 p = s->contents + h->root.u.def.value; 12826 plt = htab->elf.splt; 12827 if (!htab->elf.dynamic_sections_created 12828 || h->dynindx == -1) 12829 plt = htab->elf.iplt; 12830 off = pent->plt.offset + plt->output_offset + plt->output_section->vma; 12831 off -= h->root.u.def.value + s->output_offset + s->output_section->vma; 12832 12833 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) 12834 { 12835 info->callbacks->einfo 12836 (_("%P: linkage table error against `%T'\n"), 12837 h->root.root.string); 12838 bfd_set_error (bfd_error_bad_value); 12839 htab->stub_error = TRUE; 12840 } 12841 12842 htab->stub_count[ppc_stub_global_entry - 1] += 1; 12843 if (htab->params->emit_stub_syms) 12844 { 12845 size_t len = strlen (h->root.root.string); 12846 char *name = bfd_malloc (sizeof "12345678.global_entry." + len); 12847 12848 if (name == NULL) 12849 return FALSE; 12850 12851 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string); 12852 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 12853 if (h == NULL) 12854 return FALSE; 12855 if (h->root.type == bfd_link_hash_new) 12856 { 12857 h->root.type = bfd_link_hash_defined; 12858 h->root.u.def.section = s; 12859 h->root.u.def.value = p - s->contents; 12860 h->ref_regular = 1; 12861 h->def_regular = 1; 12862 h->ref_regular_nonweak = 1; 12863 h->forced_local = 1; 12864 h->non_elf = 0; 12865 h->root.linker_def = 1; 12866 } 12867 } 12868 12869 if (PPC_HA (off) != 0) 12870 { 12871 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p); 12872 p += 4; 12873 } 12874 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p); 12875 p += 4; 12876 bfd_put_32 (s->owner, MTCTR_R12, p); 12877 p += 4; 12878 bfd_put_32 (s->owner, BCTR, p); 12879 break; 12880 } 12881 return TRUE; 12882} 12883 12884/* Build all the stubs associated with the current output file. 12885 The stubs are kept in a hash table attached to the main linker 12886 hash table. This function is called via gldelf64ppc_finish. */ 12887 12888bfd_boolean 12889ppc64_elf_build_stubs (struct bfd_link_info *info, 12890 char **stats) 12891{ 12892 struct ppc_link_hash_table *htab = ppc_hash_table (info); 12893 struct map_stub *group; 12894 asection *stub_sec; 12895 bfd_byte *p; 12896 int stub_sec_count = 0; 12897 12898 if (htab == NULL) 12899 return FALSE; 12900 12901 /* Allocate memory to hold the linker stubs. */ 12902 for (stub_sec = htab->params->stub_bfd->sections; 12903 stub_sec != NULL; 12904 stub_sec = stub_sec->next) 12905 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 12906 && stub_sec->size != 0) 12907 { 12908 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size); 12909 if (stub_sec->contents == NULL) 12910 return FALSE; 12911 stub_sec->size = 0; 12912 } 12913 12914 if (htab->glink != NULL && htab->glink->size != 0) 12915 { 12916 unsigned int indx; 12917 bfd_vma plt0; 12918 12919 /* Build the .glink plt call stub. */ 12920 if (htab->params->emit_stub_syms) 12921 { 12922 struct elf_link_hash_entry *h; 12923 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 12924 TRUE, FALSE, FALSE); 12925 if (h == NULL) 12926 return FALSE; 12927 if (h->root.type == bfd_link_hash_new) 12928 { 12929 h->root.type = bfd_link_hash_defined; 12930 h->root.u.def.section = htab->glink; 12931 h->root.u.def.value = 8; 12932 h->ref_regular = 1; 12933 h->def_regular = 1; 12934 h->ref_regular_nonweak = 1; 12935 h->forced_local = 1; 12936 h->non_elf = 0; 12937 h->root.linker_def = 1; 12938 } 12939 } 12940 plt0 = (htab->elf.splt->output_section->vma 12941 + htab->elf.splt->output_offset 12942 - 16); 12943 if (info->emitrelocations) 12944 { 12945 Elf_Internal_Rela *r = get_relocs (htab->glink, 1); 12946 if (r == NULL) 12947 return FALSE; 12948 r->r_offset = (htab->glink->output_offset 12949 + htab->glink->output_section->vma); 12950 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64); 12951 r->r_addend = plt0; 12952 } 12953 p = htab->glink->contents; 12954 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset; 12955 bfd_put_64 (htab->glink->owner, plt0, p); 12956 p += 8; 12957 if (htab->opd_abi) 12958 { 12959 bfd_put_32 (htab->glink->owner, MFLR_R12, p); 12960 p += 4; 12961 bfd_put_32 (htab->glink->owner, BCL_20_31, p); 12962 p += 4; 12963 bfd_put_32 (htab->glink->owner, MFLR_R11, p); 12964 p += 4; 12965 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); 12966 p += 4; 12967 bfd_put_32 (htab->glink->owner, MTLR_R12, p); 12968 p += 4; 12969 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); 12970 p += 4; 12971 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); 12972 p += 4; 12973 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p); 12974 p += 4; 12975 bfd_put_32 (htab->glink->owner, MTCTR_R12, p); 12976 p += 4; 12977 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p); 12978 p += 4; 12979 } 12980 else 12981 { 12982 bfd_put_32 (htab->glink->owner, MFLR_R0, p); 12983 p += 4; 12984 bfd_put_32 (htab->glink->owner, BCL_20_31, p); 12985 p += 4; 12986 bfd_put_32 (htab->glink->owner, MFLR_R11, p); 12987 p += 4; 12988 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); 12989 p += 4; 12990 bfd_put_32 (htab->glink->owner, MTLR_R0, p); 12991 p += 4; 12992 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); 12993 p += 4; 12994 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); 12995 p += 4; 12996 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p); 12997 p += 4; 12998 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); 12999 p += 4; 13000 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p); 13001 p += 4; 13002 bfd_put_32 (htab->glink->owner, MTCTR_R12, p); 13003 p += 4; 13004 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p); 13005 p += 4; 13006 } 13007 bfd_put_32 (htab->glink->owner, BCTR, p); 13008 p += 4; 13009 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE) 13010 { 13011 bfd_put_32 (htab->glink->owner, NOP, p); 13012 p += 4; 13013 } 13014 13015 /* Build the .glink lazy link call stubs. */ 13016 indx = 0; 13017 while (p < htab->glink->contents + htab->glink->rawsize) 13018 { 13019 if (htab->opd_abi) 13020 { 13021 if (indx < 0x8000) 13022 { 13023 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); 13024 p += 4; 13025 } 13026 else 13027 { 13028 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); 13029 p += 4; 13030 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), 13031 p); 13032 p += 4; 13033 } 13034 } 13035 bfd_put_32 (htab->glink->owner, 13036 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); 13037 indx++; 13038 p += 4; 13039 } 13040 13041 /* Build .glink global entry stubs. */ 13042 if (htab->glink->size > htab->glink->rawsize) 13043 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info); 13044 } 13045 13046 if (htab->brlt != NULL && htab->brlt->size != 0) 13047 { 13048 htab->brlt->contents = bfd_zalloc (htab->brlt->owner, 13049 htab->brlt->size); 13050 if (htab->brlt->contents == NULL) 13051 return FALSE; 13052 } 13053 if (htab->relbrlt != NULL && htab->relbrlt->size != 0) 13054 { 13055 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, 13056 htab->relbrlt->size); 13057 if (htab->relbrlt->contents == NULL) 13058 return FALSE; 13059 } 13060 13061 /* Build the stubs as directed by the stub hash table. */ 13062 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); 13063 13064 for (group = htab->group; group != NULL; group = group->next) 13065 if (group->needs_save_res) 13066 { 13067 stub_sec = group->stub_sec; 13068 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents, 13069 htab->sfpr->size); 13070 if (htab->params->emit_stub_syms) 13071 { 13072 unsigned int i; 13073 13074 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) 13075 if (!sfpr_define (info, &save_res_funcs[i], stub_sec)) 13076 return FALSE; 13077 } 13078 stub_sec->size += htab->sfpr->size; 13079 } 13080 13081 if (htab->relbrlt != NULL) 13082 htab->relbrlt->reloc_count = 0; 13083 13084 if (htab->params->plt_stub_align != 0) 13085 for (stub_sec = htab->params->stub_bfd->sections; 13086 stub_sec != NULL; 13087 stub_sec = stub_sec->next) 13088 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 13089 stub_sec->size = ((stub_sec->size 13090 + (1 << htab->params->plt_stub_align) - 1) 13091 & -(1 << htab->params->plt_stub_align)); 13092 13093 for (stub_sec = htab->params->stub_bfd->sections; 13094 stub_sec != NULL; 13095 stub_sec = stub_sec->next) 13096 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 13097 { 13098 stub_sec_count += 1; 13099 if (stub_sec->rawsize != stub_sec->size 13100 && (htab->stub_iteration <= STUB_SHRINK_ITER 13101 || stub_sec->rawsize < stub_sec->size)) 13102 break; 13103 } 13104 13105 /* Note that the glink_eh_frame check here is not only testing that 13106 the generated size matched the calculated size but also that 13107 bfd_elf_discard_info didn't make any changes to the section. */ 13108 if (stub_sec != NULL 13109 || (htab->glink_eh_frame != NULL 13110 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size)) 13111 { 13112 htab->stub_error = TRUE; 13113 info->callbacks->einfo (_("%P: stubs don't match calculated size\n")); 13114 } 13115 13116 if (htab->stub_error) 13117 return FALSE; 13118 13119 if (stats != NULL) 13120 { 13121 *stats = bfd_malloc (500); 13122 if (*stats == NULL) 13123 return FALSE; 13124 13125 sprintf (*stats, _("linker stubs in %u group%s\n" 13126 " branch %lu\n" 13127 " toc adjust %lu\n" 13128 " long branch %lu\n" 13129 " long toc adj %lu\n" 13130 " plt call %lu\n" 13131 " plt call toc %lu\n" 13132 " global entry %lu"), 13133 stub_sec_count, 13134 stub_sec_count == 1 ? "" : "s", 13135 htab->stub_count[ppc_stub_long_branch - 1], 13136 htab->stub_count[ppc_stub_long_branch_r2off - 1], 13137 htab->stub_count[ppc_stub_plt_branch - 1], 13138 htab->stub_count[ppc_stub_plt_branch_r2off - 1], 13139 htab->stub_count[ppc_stub_plt_call - 1], 13140 htab->stub_count[ppc_stub_plt_call_r2save - 1], 13141 htab->stub_count[ppc_stub_global_entry - 1]); 13142 } 13143 return TRUE; 13144} 13145 13146/* This function undoes the changes made by add_symbol_adjust. */ 13147 13148static bfd_boolean 13149undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) 13150{ 13151 struct ppc_link_hash_entry *eh; 13152 13153 if (h->root.type == bfd_link_hash_indirect) 13154 return TRUE; 13155 13156 eh = (struct ppc_link_hash_entry *) h; 13157 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined) 13158 return TRUE; 13159 13160 eh->elf.root.type = bfd_link_hash_undefined; 13161 return TRUE; 13162} 13163 13164void 13165ppc64_elf_restore_symbols (struct bfd_link_info *info) 13166{ 13167 struct ppc_link_hash_table *htab = ppc_hash_table (info); 13168 13169 if (htab != NULL) 13170 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info); 13171} 13172 13173/* What to do when ld finds relocations against symbols defined in 13174 discarded sections. */ 13175 13176static unsigned int 13177ppc64_elf_action_discarded (asection *sec) 13178{ 13179 if (strcmp (".opd", sec->name) == 0) 13180 return 0; 13181 13182 if (strcmp (".toc", sec->name) == 0) 13183 return 0; 13184 13185 if (strcmp (".toc1", sec->name) == 0) 13186 return 0; 13187 13188 return _bfd_elf_default_action_discarded (sec); 13189} 13190 13191/* The RELOCATE_SECTION function is called by the ELF backend linker 13192 to handle the relocations for a section. 13193 13194 The relocs are always passed as Rela structures; if the section 13195 actually uses Rel structures, the r_addend field will always be 13196 zero. 13197 13198 This function is responsible for adjust the section contents as 13199 necessary, and (if using Rela relocs and generating a 13200 relocatable output file) adjusting the reloc addend as 13201 necessary. 13202 13203 This function does not have to worry about setting the reloc 13204 address or the reloc symbol index. 13205 13206 LOCAL_SYMS is a pointer to the swapped in local symbols. 13207 13208 LOCAL_SECTIONS is an array giving the section in the input file 13209 corresponding to the st_shndx field of each local symbol. 13210 13211 The global hash table entry for the global symbols can be found 13212 via elf_sym_hashes (input_bfd). 13213 13214 When generating relocatable output, this function must handle 13215 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 13216 going to be the section symbol corresponding to the output 13217 section, which means that the addend must be adjusted 13218 accordingly. */ 13219 13220static bfd_boolean 13221ppc64_elf_relocate_section (bfd *output_bfd, 13222 struct bfd_link_info *info, 13223 bfd *input_bfd, 13224 asection *input_section, 13225 bfd_byte *contents, 13226 Elf_Internal_Rela *relocs, 13227 Elf_Internal_Sym *local_syms, 13228 asection **local_sections) 13229{ 13230 struct ppc_link_hash_table *htab; 13231 Elf_Internal_Shdr *symtab_hdr; 13232 struct elf_link_hash_entry **sym_hashes; 13233 Elf_Internal_Rela *rel; 13234 Elf_Internal_Rela *wrel; 13235 Elf_Internal_Rela *relend; 13236 Elf_Internal_Rela outrel; 13237 bfd_byte *loc; 13238 struct got_entry **local_got_ents; 13239 bfd_vma TOCstart; 13240 bfd_boolean ret = TRUE; 13241 bfd_boolean is_opd; 13242 /* Assume 'at' branch hints. */ 13243 bfd_boolean is_isa_v2 = TRUE; 13244 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 13245 13246 /* Initialize howto table if needed. */ 13247 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 13248 ppc_howto_init (); 13249 13250 htab = ppc_hash_table (info); 13251 if (htab == NULL) 13252 return FALSE; 13253 13254 /* Don't relocate stub sections. */ 13255 if (input_section->owner == htab->params->stub_bfd) 13256 return TRUE; 13257 13258 BFD_ASSERT (is_ppc64_elf (input_bfd)); 13259 13260 local_got_ents = elf_local_got_ents (input_bfd); 13261 TOCstart = elf_gp (output_bfd); 13262 symtab_hdr = &elf_symtab_hdr (input_bfd); 13263 sym_hashes = elf_sym_hashes (input_bfd); 13264 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; 13265 13266 rel = wrel = relocs; 13267 relend = relocs + input_section->reloc_count; 13268 for (; rel < relend; wrel++, rel++) 13269 { 13270 enum elf_ppc64_reloc_type r_type; 13271 bfd_vma addend; 13272 bfd_reloc_status_type r; 13273 Elf_Internal_Sym *sym; 13274 asection *sec; 13275 struct elf_link_hash_entry *h_elf; 13276 struct ppc_link_hash_entry *h; 13277 struct ppc_link_hash_entry *fdh; 13278 const char *sym_name; 13279 unsigned long r_symndx, toc_symndx; 13280 bfd_vma toc_addend; 13281 unsigned char tls_mask, tls_gd, tls_type; 13282 unsigned char sym_type; 13283 bfd_vma relocation; 13284 bfd_boolean unresolved_reloc; 13285 bfd_boolean warned; 13286 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest; 13287 unsigned int insn; 13288 unsigned int mask; 13289 struct ppc_stub_hash_entry *stub_entry; 13290 bfd_vma max_br_offset; 13291 bfd_vma from; 13292 Elf_Internal_Rela orig_rel; 13293 reloc_howto_type *howto; 13294 struct reloc_howto_struct alt_howto; 13295 13296 again: 13297 orig_rel = *rel; 13298 13299 r_type = ELF64_R_TYPE (rel->r_info); 13300 r_symndx = ELF64_R_SYM (rel->r_info); 13301 13302 /* For old style R_PPC64_TOC relocs with a zero symbol, use the 13303 symbol of the previous ADDR64 reloc. The symbol gives us the 13304 proper TOC base to use. */ 13305 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) 13306 && wrel != relocs 13307 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64 13308 && is_opd) 13309 r_symndx = ELF64_R_SYM (wrel[-1].r_info); 13310 13311 sym = NULL; 13312 sec = NULL; 13313 h_elf = NULL; 13314 sym_name = NULL; 13315 unresolved_reloc = FALSE; 13316 warned = FALSE; 13317 13318 if (r_symndx < symtab_hdr->sh_info) 13319 { 13320 /* It's a local symbol. */ 13321 struct _opd_sec_data *opd; 13322 13323 sym = local_syms + r_symndx; 13324 sec = local_sections[r_symndx]; 13325 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 13326 sym_type = ELF64_ST_TYPE (sym->st_info); 13327 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 13328 opd = get_opd_info (sec); 13329 if (opd != NULL && opd->adjust != NULL) 13330 { 13331 long adjust = opd->adjust[OPD_NDX (sym->st_value 13332 + rel->r_addend)]; 13333 if (adjust == -1) 13334 relocation = 0; 13335 else 13336 { 13337 /* If this is a relocation against the opd section sym 13338 and we have edited .opd, adjust the reloc addend so 13339 that ld -r and ld --emit-relocs output is correct. 13340 If it is a reloc against some other .opd symbol, 13341 then the symbol value will be adjusted later. */ 13342 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 13343 rel->r_addend += adjust; 13344 else 13345 relocation += adjust; 13346 } 13347 } 13348 } 13349 else 13350 { 13351 bfd_boolean ignored; 13352 13353 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 13354 r_symndx, symtab_hdr, sym_hashes, 13355 h_elf, sec, relocation, 13356 unresolved_reloc, warned, ignored); 13357 sym_name = h_elf->root.root.string; 13358 sym_type = h_elf->type; 13359 if (sec != NULL 13360 && sec->owner == output_bfd 13361 && strcmp (sec->name, ".opd") == 0) 13362 { 13363 /* This is a symbol defined in a linker script. All 13364 such are defined in output sections, even those 13365 defined by simple assignment from a symbol defined in 13366 an input section. Transfer the symbol to an 13367 appropriate input .opd section, so that a branch to 13368 this symbol will be mapped to the location specified 13369 by the opd entry. */ 13370 struct bfd_link_order *lo; 13371 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next) 13372 if (lo->type == bfd_indirect_link_order) 13373 { 13374 asection *isec = lo->u.indirect.section; 13375 if (h_elf->root.u.def.value >= isec->output_offset 13376 && h_elf->root.u.def.value < (isec->output_offset 13377 + isec->size)) 13378 { 13379 h_elf->root.u.def.value -= isec->output_offset; 13380 h_elf->root.u.def.section = isec; 13381 sec = isec; 13382 break; 13383 } 13384 } 13385 } 13386 } 13387 h = (struct ppc_link_hash_entry *) h_elf; 13388 13389 if (sec != NULL && discarded_section (sec)) 13390 { 13391 _bfd_clear_contents (ppc64_elf_howto_table[r_type], 13392 input_bfd, input_section, 13393 contents + rel->r_offset); 13394 wrel->r_offset = rel->r_offset; 13395 wrel->r_info = 0; 13396 wrel->r_addend = 0; 13397 13398 /* For ld -r, remove relocations in debug sections against 13399 sections defined in discarded sections. Not done for 13400 non-debug to preserve relocs in .eh_frame which the 13401 eh_frame editing code expects to be present. */ 13402 if (bfd_link_relocatable (info) 13403 && (input_section->flags & SEC_DEBUGGING)) 13404 wrel--; 13405 13406 continue; 13407 } 13408 13409 if (bfd_link_relocatable (info)) 13410 goto copy_reloc; 13411 13412 if (h != NULL && &h->elf == htab->elf.hgot) 13413 { 13414 relocation = TOCstart + htab->sec_info[input_section->id].toc_off; 13415 sec = bfd_abs_section_ptr; 13416 unresolved_reloc = FALSE; 13417 } 13418 13419 /* TLS optimizations. Replace instruction sequences and relocs 13420 based on information we collected in tls_optimize. We edit 13421 RELOCS so that --emit-relocs will output something sensible 13422 for the final instruction stream. */ 13423 tls_mask = 0; 13424 tls_gd = 0; 13425 toc_symndx = 0; 13426 if (h != NULL) 13427 tls_mask = h->tls_mask; 13428 else if (local_got_ents != NULL) 13429 { 13430 struct plt_entry **local_plt = (struct plt_entry **) 13431 (local_got_ents + symtab_hdr->sh_info); 13432 unsigned char *lgot_masks = (unsigned char *) 13433 (local_plt + symtab_hdr->sh_info); 13434 tls_mask = lgot_masks[r_symndx]; 13435 } 13436 if (tls_mask == 0 13437 && (r_type == R_PPC64_TLS 13438 || r_type == R_PPC64_TLSGD 13439 || r_type == R_PPC64_TLSLD)) 13440 { 13441 /* Check for toc tls entries. */ 13442 unsigned char *toc_tls; 13443 13444 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, 13445 &local_syms, rel, input_bfd)) 13446 return FALSE; 13447 13448 if (toc_tls) 13449 tls_mask = *toc_tls; 13450 } 13451 13452 /* Check that tls relocs are used with tls syms, and non-tls 13453 relocs are used with non-tls syms. */ 13454 if (r_symndx != STN_UNDEF 13455 && r_type != R_PPC64_NONE 13456 && (h == NULL 13457 || h->elf.root.type == bfd_link_hash_defined 13458 || h->elf.root.type == bfd_link_hash_defweak) 13459 && (IS_PPC64_TLS_RELOC (r_type) 13460 != (sym_type == STT_TLS 13461 || (sym_type == STT_SECTION 13462 && (sec->flags & SEC_THREAD_LOCAL) != 0)))) 13463 { 13464 if (tls_mask != 0 13465 && (r_type == R_PPC64_TLS 13466 || r_type == R_PPC64_TLSGD 13467 || r_type == R_PPC64_TLSLD)) 13468 /* R_PPC64_TLS is OK against a symbol in the TOC. */ 13469 ; 13470 else 13471 info->callbacks->einfo 13472 (!IS_PPC64_TLS_RELOC (r_type) 13473 ? _("%P: %H: %s used with TLS symbol `%T'\n") 13474 : _("%P: %H: %s used with non-TLS symbol `%T'\n"), 13475 input_bfd, input_section, rel->r_offset, 13476 ppc64_elf_howto_table[r_type]->name, 13477 sym_name); 13478 } 13479 13480 /* Ensure reloc mapping code below stays sane. */ 13481 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 13482 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 13483 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) 13484 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) 13485 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) 13486 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) 13487 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) 13488 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) 13489 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) 13490 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) 13491 abort (); 13492 13493 switch (r_type) 13494 { 13495 default: 13496 break; 13497 13498 case R_PPC64_LO_DS_OPT: 13499 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 13500 if ((insn & (0x3f << 26)) != 58u << 26) 13501 abort (); 13502 insn += (14u << 26) - (58u << 26); 13503 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); 13504 r_type = R_PPC64_TOC16_LO; 13505 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13506 break; 13507 13508 case R_PPC64_TOC16: 13509 case R_PPC64_TOC16_LO: 13510 case R_PPC64_TOC16_DS: 13511 case R_PPC64_TOC16_LO_DS: 13512 { 13513 /* Check for toc tls entries. */ 13514 unsigned char *toc_tls; 13515 int retval; 13516 13517 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, 13518 &local_syms, rel, input_bfd); 13519 if (retval == 0) 13520 return FALSE; 13521 13522 if (toc_tls) 13523 { 13524 tls_mask = *toc_tls; 13525 if (r_type == R_PPC64_TOC16_DS 13526 || r_type == R_PPC64_TOC16_LO_DS) 13527 { 13528 if (tls_mask != 0 13529 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) 13530 goto toctprel; 13531 } 13532 else 13533 { 13534 /* If we found a GD reloc pair, then we might be 13535 doing a GD->IE transition. */ 13536 if (retval == 2) 13537 { 13538 tls_gd = TLS_TPRELGD; 13539 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 13540 goto tls_ldgd_opt; 13541 } 13542 else if (retval == 3) 13543 { 13544 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 13545 goto tls_ldgd_opt; 13546 } 13547 } 13548 } 13549 } 13550 break; 13551 13552 case R_PPC64_GOT_TPREL16_HI: 13553 case R_PPC64_GOT_TPREL16_HA: 13554 if (tls_mask != 0 13555 && (tls_mask & TLS_TPREL) == 0) 13556 { 13557 rel->r_offset -= d_offset; 13558 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 13559 r_type = R_PPC64_NONE; 13560 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13561 } 13562 break; 13563 13564 case R_PPC64_GOT_TPREL16_DS: 13565 case R_PPC64_GOT_TPREL16_LO_DS: 13566 if (tls_mask != 0 13567 && (tls_mask & TLS_TPREL) == 0) 13568 { 13569 toctprel: 13570 insn = bfd_get_32 (output_bfd, 13571 contents + rel->r_offset - d_offset); 13572 insn &= 31 << 21; 13573 insn |= 0x3c0d0000; /* addis 0,13,0 */ 13574 bfd_put_32 (output_bfd, insn, 13575 contents + rel->r_offset - d_offset); 13576 r_type = R_PPC64_TPREL16_HA; 13577 if (toc_symndx != 0) 13578 { 13579 rel->r_info = ELF64_R_INFO (toc_symndx, r_type); 13580 rel->r_addend = toc_addend; 13581 /* We changed the symbol. Start over in order to 13582 get h, sym, sec etc. right. */ 13583 goto again; 13584 } 13585 else 13586 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13587 } 13588 break; 13589 13590 case R_PPC64_TLS: 13591 if (tls_mask != 0 13592 && (tls_mask & TLS_TPREL) == 0) 13593 { 13594 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 13595 insn = _bfd_elf_ppc_at_tls_transform (insn, 13); 13596 if (insn == 0) 13597 abort (); 13598 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 13599 /* Was PPC64_TLS which sits on insn boundary, now 13600 PPC64_TPREL16_LO which is at low-order half-word. */ 13601 rel->r_offset += d_offset; 13602 r_type = R_PPC64_TPREL16_LO; 13603 if (toc_symndx != 0) 13604 { 13605 rel->r_info = ELF64_R_INFO (toc_symndx, r_type); 13606 rel->r_addend = toc_addend; 13607 /* We changed the symbol. Start over in order to 13608 get h, sym, sec etc. right. */ 13609 goto again; 13610 } 13611 else 13612 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13613 } 13614 break; 13615 13616 case R_PPC64_GOT_TLSGD16_HI: 13617 case R_PPC64_GOT_TLSGD16_HA: 13618 tls_gd = TLS_TPRELGD; 13619 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 13620 goto tls_gdld_hi; 13621 break; 13622 13623 case R_PPC64_GOT_TLSLD16_HI: 13624 case R_PPC64_GOT_TLSLD16_HA: 13625 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 13626 { 13627 tls_gdld_hi: 13628 if ((tls_mask & tls_gd) != 0) 13629 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) 13630 + R_PPC64_GOT_TPREL16_DS); 13631 else 13632 { 13633 rel->r_offset -= d_offset; 13634 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 13635 r_type = R_PPC64_NONE; 13636 } 13637 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13638 } 13639 break; 13640 13641 case R_PPC64_GOT_TLSGD16: 13642 case R_PPC64_GOT_TLSGD16_LO: 13643 tls_gd = TLS_TPRELGD; 13644 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 13645 goto tls_ldgd_opt; 13646 break; 13647 13648 case R_PPC64_GOT_TLSLD16: 13649 case R_PPC64_GOT_TLSLD16_LO: 13650 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 13651 { 13652 unsigned int insn1, insn2, insn3; 13653 bfd_vma offset; 13654 13655 tls_ldgd_opt: 13656 offset = (bfd_vma) -1; 13657 /* If not using the newer R_PPC64_TLSGD/LD to mark 13658 __tls_get_addr calls, we must trust that the call 13659 stays with its arg setup insns, ie. that the next 13660 reloc is the __tls_get_addr call associated with 13661 the current reloc. Edit both insns. */ 13662 if (input_section->has_tls_get_addr_call 13663 && rel + 1 < relend 13664 && branch_reloc_hash_match (input_bfd, rel + 1, 13665 htab->tls_get_addr, 13666 htab->tls_get_addr_fd)) 13667 offset = rel[1].r_offset; 13668 /* We read the low GOT_TLS (or TOC16) insn because we 13669 need to keep the destination reg. It may be 13670 something other than the usual r3, and moved to r3 13671 before the call by intervening code. */ 13672 insn1 = bfd_get_32 (output_bfd, 13673 contents + rel->r_offset - d_offset); 13674 if ((tls_mask & tls_gd) != 0) 13675 { 13676 /* IE */ 13677 insn1 &= (0x1f << 21) | (0x1f << 16); 13678 insn1 |= 58 << 26; /* ld */ 13679 insn2 = 0x7c636a14; /* add 3,3,13 */ 13680 if (offset != (bfd_vma) -1) 13681 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); 13682 if ((tls_mask & TLS_EXPLICIT) == 0) 13683 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) 13684 + R_PPC64_GOT_TPREL16_DS); 13685 else 13686 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; 13687 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13688 } 13689 else 13690 { 13691 /* LE */ 13692 insn1 &= 0x1f << 21; 13693 insn1 |= 0x3c0d0000; /* addis r,13,0 */ 13694 insn2 = 0x38630000; /* addi 3,3,0 */ 13695 if (tls_gd == 0) 13696 { 13697 /* Was an LD reloc. */ 13698 if (toc_symndx) 13699 sec = local_sections[toc_symndx]; 13700 for (r_symndx = 0; 13701 r_symndx < symtab_hdr->sh_info; 13702 r_symndx++) 13703 if (local_sections[r_symndx] == sec) 13704 break; 13705 if (r_symndx >= symtab_hdr->sh_info) 13706 r_symndx = STN_UNDEF; 13707 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 13708 if (r_symndx != STN_UNDEF) 13709 rel->r_addend -= (local_syms[r_symndx].st_value 13710 + sec->output_offset 13711 + sec->output_section->vma); 13712 } 13713 else if (toc_symndx != 0) 13714 { 13715 r_symndx = toc_symndx; 13716 rel->r_addend = toc_addend; 13717 } 13718 r_type = R_PPC64_TPREL16_HA; 13719 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13720 if (offset != (bfd_vma) -1) 13721 { 13722 rel[1].r_info = ELF64_R_INFO (r_symndx, 13723 R_PPC64_TPREL16_LO); 13724 rel[1].r_offset = offset + d_offset; 13725 rel[1].r_addend = rel->r_addend; 13726 } 13727 } 13728 bfd_put_32 (output_bfd, insn1, 13729 contents + rel->r_offset - d_offset); 13730 if (offset != (bfd_vma) -1) 13731 { 13732 insn3 = bfd_get_32 (output_bfd, 13733 contents + offset + 4); 13734 if (insn3 == NOP 13735 || insn3 == CROR_151515 || insn3 == CROR_313131) 13736 { 13737 rel[1].r_offset += 4; 13738 bfd_put_32 (output_bfd, insn2, contents + offset + 4); 13739 insn2 = NOP; 13740 } 13741 bfd_put_32 (output_bfd, insn2, contents + offset); 13742 } 13743 if ((tls_mask & tls_gd) == 0 13744 && (tls_gd == 0 || toc_symndx != 0)) 13745 { 13746 /* We changed the symbol. Start over in order 13747 to get h, sym, sec etc. right. */ 13748 goto again; 13749 } 13750 } 13751 break; 13752 13753 case R_PPC64_TLSGD: 13754 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 13755 { 13756 unsigned int insn2, insn3; 13757 bfd_vma offset = rel->r_offset; 13758 13759 if ((tls_mask & TLS_TPRELGD) != 0) 13760 { 13761 /* IE */ 13762 r_type = R_PPC64_NONE; 13763 insn2 = 0x7c636a14; /* add 3,3,13 */ 13764 } 13765 else 13766 { 13767 /* LE */ 13768 if (toc_symndx != 0) 13769 { 13770 r_symndx = toc_symndx; 13771 rel->r_addend = toc_addend; 13772 } 13773 r_type = R_PPC64_TPREL16_LO; 13774 rel->r_offset = offset + d_offset; 13775 insn2 = 0x38630000; /* addi 3,3,0 */ 13776 } 13777 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13778 /* Zap the reloc on the _tls_get_addr call too. */ 13779 BFD_ASSERT (offset == rel[1].r_offset); 13780 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); 13781 insn3 = bfd_get_32 (output_bfd, 13782 contents + offset + 4); 13783 if (insn3 == NOP 13784 || insn3 == CROR_151515 || insn3 == CROR_313131) 13785 { 13786 rel->r_offset += 4; 13787 bfd_put_32 (output_bfd, insn2, contents + offset + 4); 13788 insn2 = NOP; 13789 } 13790 bfd_put_32 (output_bfd, insn2, contents + offset); 13791 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0) 13792 goto again; 13793 } 13794 break; 13795 13796 case R_PPC64_TLSLD: 13797 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 13798 { 13799 unsigned int insn2, insn3; 13800 bfd_vma offset = rel->r_offset; 13801 13802 if (toc_symndx) 13803 sec = local_sections[toc_symndx]; 13804 for (r_symndx = 0; 13805 r_symndx < symtab_hdr->sh_info; 13806 r_symndx++) 13807 if (local_sections[r_symndx] == sec) 13808 break; 13809 if (r_symndx >= symtab_hdr->sh_info) 13810 r_symndx = STN_UNDEF; 13811 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 13812 if (r_symndx != STN_UNDEF) 13813 rel->r_addend -= (local_syms[r_symndx].st_value 13814 + sec->output_offset 13815 + sec->output_section->vma); 13816 13817 r_type = R_PPC64_TPREL16_LO; 13818 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13819 rel->r_offset = offset + d_offset; 13820 /* Zap the reloc on the _tls_get_addr call too. */ 13821 BFD_ASSERT (offset == rel[1].r_offset); 13822 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); 13823 insn2 = 0x38630000; /* addi 3,3,0 */ 13824 insn3 = bfd_get_32 (output_bfd, 13825 contents + offset + 4); 13826 if (insn3 == NOP 13827 || insn3 == CROR_151515 || insn3 == CROR_313131) 13828 { 13829 rel->r_offset += 4; 13830 bfd_put_32 (output_bfd, insn2, contents + offset + 4); 13831 insn2 = NOP; 13832 } 13833 bfd_put_32 (output_bfd, insn2, contents + offset); 13834 goto again; 13835 } 13836 break; 13837 13838 case R_PPC64_DTPMOD64: 13839 if (rel + 1 < relend 13840 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) 13841 && rel[1].r_offset == rel->r_offset + 8) 13842 { 13843 if ((tls_mask & TLS_GD) == 0) 13844 { 13845 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); 13846 if ((tls_mask & TLS_TPRELGD) != 0) 13847 r_type = R_PPC64_TPREL64; 13848 else 13849 { 13850 bfd_put_64 (output_bfd, 1, contents + rel->r_offset); 13851 r_type = R_PPC64_NONE; 13852 } 13853 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13854 } 13855 } 13856 else 13857 { 13858 if ((tls_mask & TLS_LD) == 0) 13859 { 13860 bfd_put_64 (output_bfd, 1, contents + rel->r_offset); 13861 r_type = R_PPC64_NONE; 13862 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13863 } 13864 } 13865 break; 13866 13867 case R_PPC64_TPREL64: 13868 if ((tls_mask & TLS_TPREL) == 0) 13869 { 13870 r_type = R_PPC64_NONE; 13871 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13872 } 13873 break; 13874 13875 case R_PPC64_ENTRY: 13876 relocation = TOCstart + htab->sec_info[input_section->id].toc_off; 13877 if (!bfd_link_pic (info) 13878 && !info->traditional_format 13879 && relocation + 0x80008000 <= 0xffffffff) 13880 { 13881 unsigned int insn1, insn2; 13882 13883 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); 13884 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 13885 if ((insn1 & ~0xfffc) == LD_R2_0R12 13886 && insn2 == ADD_R2_R2_R12) 13887 { 13888 bfd_put_32 (output_bfd, 13889 LIS_R2 + PPC_HA (relocation), 13890 contents + rel->r_offset); 13891 bfd_put_32 (output_bfd, 13892 ADDI_R2_R2 + PPC_LO (relocation), 13893 contents + rel->r_offset + 4); 13894 } 13895 } 13896 else 13897 { 13898 relocation -= (rel->r_offset 13899 + input_section->output_offset 13900 + input_section->output_section->vma); 13901 if (relocation + 0x80008000 <= 0xffffffff) 13902 { 13903 unsigned int insn1, insn2; 13904 13905 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); 13906 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 13907 if ((insn1 & ~0xfffc) == LD_R2_0R12 13908 && insn2 == ADD_R2_R2_R12) 13909 { 13910 bfd_put_32 (output_bfd, 13911 ADDIS_R2_R12 + PPC_HA (relocation), 13912 contents + rel->r_offset); 13913 bfd_put_32 (output_bfd, 13914 ADDI_R2_R2 + PPC_LO (relocation), 13915 contents + rel->r_offset + 4); 13916 } 13917 } 13918 } 13919 break; 13920 13921 case R_PPC64_REL16_HA: 13922 /* If we are generating a non-PIC executable, edit 13923 . 0: addis 2,12,.TOC.-0b@ha 13924 . addi 2,2,.TOC.-0b@l 13925 used by ELFv2 global entry points to set up r2, to 13926 . lis 2,.TOC.@ha 13927 . addi 2,2,.TOC.@l 13928 if .TOC. is in range. */ 13929 if (!bfd_link_pic (info) 13930 && !info->traditional_format 13931 && !htab->opd_abi 13932 && rel->r_addend == d_offset 13933 && h != NULL && &h->elf == htab->elf.hgot 13934 && rel + 1 < relend 13935 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO) 13936 && rel[1].r_offset == rel->r_offset + 4 13937 && rel[1].r_addend == rel->r_addend + 4 13938 && relocation + 0x80008000 <= 0xffffffff) 13939 { 13940 unsigned int insn1, insn2; 13941 bfd_vma offset = rel->r_offset - d_offset; 13942 insn1 = bfd_get_32 (output_bfd, contents + offset); 13943 insn2 = bfd_get_32 (output_bfd, contents + offset + 4); 13944 if ((insn1 & 0xffff0000) == ADDIS_R2_R12 13945 && (insn2 & 0xffff0000) == ADDI_R2_R2) 13946 { 13947 r_type = R_PPC64_ADDR16_HA; 13948 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 13949 rel->r_addend -= d_offset; 13950 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO); 13951 rel[1].r_addend -= d_offset + 4; 13952 bfd_put_32 (output_bfd, LIS_R2, contents + offset); 13953 } 13954 } 13955 break; 13956 } 13957 13958 /* Handle other relocations that tweak non-addend part of insn. */ 13959 insn = 0; 13960 max_br_offset = 1 << 25; 13961 addend = rel->r_addend; 13962 reloc_dest = DEST_NORMAL; 13963 switch (r_type) 13964 { 13965 default: 13966 break; 13967 13968 case R_PPC64_TOCSAVE: 13969 if (relocation + addend == (rel->r_offset 13970 + input_section->output_offset 13971 + input_section->output_section->vma) 13972 && tocsave_find (htab, NO_INSERT, 13973 &local_syms, rel, input_bfd)) 13974 { 13975 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 13976 if (insn == NOP 13977 || insn == CROR_151515 || insn == CROR_313131) 13978 bfd_put_32 (input_bfd, 13979 STD_R2_0R1 + STK_TOC (htab), 13980 contents + rel->r_offset); 13981 } 13982 break; 13983 13984 /* Branch taken prediction relocations. */ 13985 case R_PPC64_ADDR14_BRTAKEN: 13986 case R_PPC64_REL14_BRTAKEN: 13987 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ 13988 /* Fall thru. */ 13989 13990 /* Branch not taken prediction relocations. */ 13991 case R_PPC64_ADDR14_BRNTAKEN: 13992 case R_PPC64_REL14_BRNTAKEN: 13993 insn |= bfd_get_32 (output_bfd, 13994 contents + rel->r_offset) & ~(0x01 << 21); 13995 /* Fall thru. */ 13996 13997 case R_PPC64_REL14: 13998 max_br_offset = 1 << 15; 13999 /* Fall thru. */ 14000 14001 case R_PPC64_REL24: 14002 /* Calls to functions with a different TOC, such as calls to 14003 shared objects, need to alter the TOC pointer. This is 14004 done using a linkage stub. A REL24 branching to these 14005 linkage stubs needs to be followed by a nop, as the nop 14006 will be replaced with an instruction to restore the TOC 14007 base pointer. */ 14008 fdh = h; 14009 if (h != NULL 14010 && h->oh != NULL 14011 && h->oh->is_func_descriptor) 14012 fdh = ppc_follow_link (h->oh); 14013 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel, 14014 htab); 14015 if (stub_entry != NULL 14016 && (stub_entry->stub_type == ppc_stub_plt_call 14017 || stub_entry->stub_type == ppc_stub_plt_call_r2save 14018 || stub_entry->stub_type == ppc_stub_plt_branch_r2off 14019 || stub_entry->stub_type == ppc_stub_long_branch_r2off)) 14020 { 14021 bfd_boolean can_plt_call = FALSE; 14022 14023 /* All of these stubs will modify r2, so there must be a 14024 branch and link followed by a nop. The nop is 14025 replaced by an insn to restore r2. */ 14026 if (rel->r_offset + 8 <= input_section->size) 14027 { 14028 unsigned long br; 14029 14030 br = bfd_get_32 (input_bfd, 14031 contents + rel->r_offset); 14032 if ((br & 1) != 0) 14033 { 14034 unsigned long nop; 14035 14036 nop = bfd_get_32 (input_bfd, 14037 contents + rel->r_offset + 4); 14038 if (nop == NOP 14039 || nop == CROR_151515 || nop == CROR_313131) 14040 { 14041 if (h != NULL 14042 && (h == htab->tls_get_addr_fd 14043 || h == htab->tls_get_addr) 14044 && htab->params->tls_get_addr_opt) 14045 { 14046 /* Special stub used, leave nop alone. */ 14047 } 14048 else 14049 bfd_put_32 (input_bfd, 14050 LD_R2_0R1 + STK_TOC (htab), 14051 contents + rel->r_offset + 4); 14052 can_plt_call = TRUE; 14053 } 14054 } 14055 } 14056 14057 if (!can_plt_call && h != NULL) 14058 { 14059 const char *name = h->elf.root.root.string; 14060 14061 if (*name == '.') 14062 ++name; 14063 14064 if (strncmp (name, "__libc_start_main", 17) == 0 14065 && (name[17] == 0 || name[17] == '@')) 14066 { 14067 /* Allow crt1 branch to go via a toc adjusting 14068 stub. Other calls that never return could do 14069 the same, if we could detect such. */ 14070 can_plt_call = TRUE; 14071 } 14072 } 14073 14074 if (!can_plt_call) 14075 { 14076 /* g++ as of 20130507 emits self-calls without a 14077 following nop. This is arguably wrong since we 14078 have conflicting information. On the one hand a 14079 global symbol and on the other a local call 14080 sequence, but don't error for this special case. 14081 It isn't possible to cheaply verify we have 14082 exactly such a call. Allow all calls to the same 14083 section. */ 14084 asection *code_sec = sec; 14085 14086 if (get_opd_info (sec) != NULL) 14087 { 14088 bfd_vma off = (relocation + addend 14089 - sec->output_section->vma 14090 - sec->output_offset); 14091 14092 opd_entry_value (sec, off, &code_sec, NULL, FALSE); 14093 } 14094 if (code_sec == input_section) 14095 can_plt_call = TRUE; 14096 } 14097 14098 if (!can_plt_call) 14099 { 14100 if (stub_entry->stub_type == ppc_stub_plt_call 14101 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 14102 info->callbacks->einfo 14103 (_("%P: %H: call to `%T' lacks nop, can't restore toc; " 14104 "recompile with -fPIC\n"), 14105 input_bfd, input_section, rel->r_offset, sym_name); 14106 else 14107 info->callbacks->einfo 14108 (_("%P: %H: call to `%T' lacks nop, can't restore toc; " 14109 "(-mcmodel=small toc adjust stub)\n"), 14110 input_bfd, input_section, rel->r_offset, sym_name); 14111 14112 bfd_set_error (bfd_error_bad_value); 14113 ret = FALSE; 14114 } 14115 14116 if (can_plt_call 14117 && (stub_entry->stub_type == ppc_stub_plt_call 14118 || stub_entry->stub_type == ppc_stub_plt_call_r2save)) 14119 unresolved_reloc = FALSE; 14120 } 14121 14122 if ((stub_entry == NULL 14123 || stub_entry->stub_type == ppc_stub_long_branch 14124 || stub_entry->stub_type == ppc_stub_plt_branch) 14125 && get_opd_info (sec) != NULL) 14126 { 14127 /* The branch destination is the value of the opd entry. */ 14128 bfd_vma off = (relocation + addend 14129 - sec->output_section->vma 14130 - sec->output_offset); 14131 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE); 14132 if (dest != (bfd_vma) -1) 14133 { 14134 relocation = dest; 14135 addend = 0; 14136 reloc_dest = DEST_OPD; 14137 } 14138 } 14139 14140 /* If the branch is out of reach we ought to have a long 14141 branch stub. */ 14142 from = (rel->r_offset 14143 + input_section->output_offset 14144 + input_section->output_section->vma); 14145 14146 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh 14147 ? fdh->elf.other 14148 : sym->st_other); 14149 14150 if (stub_entry != NULL 14151 && (stub_entry->stub_type == ppc_stub_long_branch 14152 || stub_entry->stub_type == ppc_stub_plt_branch) 14153 && (r_type == R_PPC64_ADDR14_BRTAKEN 14154 || r_type == R_PPC64_ADDR14_BRNTAKEN 14155 || (relocation + addend - from + max_br_offset 14156 < 2 * max_br_offset))) 14157 /* Don't use the stub if this branch is in range. */ 14158 stub_entry = NULL; 14159 14160 if (stub_entry != NULL) 14161 { 14162 /* Munge up the value and addend so that we call the stub 14163 rather than the procedure directly. */ 14164 asection *stub_sec = stub_entry->group->stub_sec; 14165 14166 if (stub_entry->stub_type == ppc_stub_save_res) 14167 relocation += (stub_sec->output_offset 14168 + stub_sec->output_section->vma 14169 + stub_sec->size - htab->sfpr->size 14170 - htab->sfpr->output_offset 14171 - htab->sfpr->output_section->vma); 14172 else 14173 relocation = (stub_entry->stub_offset 14174 + stub_sec->output_offset 14175 + stub_sec->output_section->vma); 14176 addend = 0; 14177 reloc_dest = DEST_STUB; 14178 14179 if ((stub_entry->stub_type == ppc_stub_plt_call 14180 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 14181 && (ALWAYS_EMIT_R2SAVE 14182 || stub_entry->stub_type == ppc_stub_plt_call_r2save) 14183 && rel + 1 < relend 14184 && rel[1].r_offset == rel->r_offset + 4 14185 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE) 14186 relocation += 4; 14187 } 14188 14189 if (insn != 0) 14190 { 14191 if (is_isa_v2) 14192 { 14193 /* Set 'a' bit. This is 0b00010 in BO field for branch 14194 on CR(BI) insns (BO == 001at or 011at), and 0b01000 14195 for branch on CTR insns (BO == 1a00t or 1a01t). */ 14196 if ((insn & (0x14 << 21)) == (0x04 << 21)) 14197 insn |= 0x02 << 21; 14198 else if ((insn & (0x14 << 21)) == (0x10 << 21)) 14199 insn |= 0x08 << 21; 14200 else 14201 break; 14202 } 14203 else 14204 { 14205 /* Invert 'y' bit if not the default. */ 14206 if ((bfd_signed_vma) (relocation + addend - from) < 0) 14207 insn ^= 0x01 << 21; 14208 } 14209 14210 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 14211 } 14212 14213 /* NOP out calls to undefined weak functions. 14214 We can thus call a weak function without first 14215 checking whether the function is defined. */ 14216 else if (h != NULL 14217 && h->elf.root.type == bfd_link_hash_undefweak 14218 && h->elf.dynindx == -1 14219 && r_type == R_PPC64_REL24 14220 && relocation == 0 14221 && addend == 0) 14222 { 14223 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 14224 goto copy_reloc; 14225 } 14226 break; 14227 } 14228 14229 /* Set `addend'. */ 14230 tls_type = 0; 14231 switch (r_type) 14232 { 14233 default: 14234 info->callbacks->einfo 14235 (_("%P: %B: unknown relocation type %d for `%T'\n"), 14236 input_bfd, (int) r_type, sym_name); 14237 14238 bfd_set_error (bfd_error_bad_value); 14239 ret = FALSE; 14240 goto copy_reloc; 14241 14242 case R_PPC64_NONE: 14243 case R_PPC64_TLS: 14244 case R_PPC64_TLSGD: 14245 case R_PPC64_TLSLD: 14246 case R_PPC64_TOCSAVE: 14247 case R_PPC64_GNU_VTINHERIT: 14248 case R_PPC64_GNU_VTENTRY: 14249 case R_PPC64_ENTRY: 14250 goto copy_reloc; 14251 14252 /* GOT16 relocations. Like an ADDR16 using the symbol's 14253 address in the GOT as relocation value instead of the 14254 symbol's value itself. Also, create a GOT entry for the 14255 symbol and put the symbol value there. */ 14256 case R_PPC64_GOT_TLSGD16: 14257 case R_PPC64_GOT_TLSGD16_LO: 14258 case R_PPC64_GOT_TLSGD16_HI: 14259 case R_PPC64_GOT_TLSGD16_HA: 14260 tls_type = TLS_TLS | TLS_GD; 14261 goto dogot; 14262 14263 case R_PPC64_GOT_TLSLD16: 14264 case R_PPC64_GOT_TLSLD16_LO: 14265 case R_PPC64_GOT_TLSLD16_HI: 14266 case R_PPC64_GOT_TLSLD16_HA: 14267 tls_type = TLS_TLS | TLS_LD; 14268 goto dogot; 14269 14270 case R_PPC64_GOT_TPREL16_DS: 14271 case R_PPC64_GOT_TPREL16_LO_DS: 14272 case R_PPC64_GOT_TPREL16_HI: 14273 case R_PPC64_GOT_TPREL16_HA: 14274 tls_type = TLS_TLS | TLS_TPREL; 14275 goto dogot; 14276 14277 case R_PPC64_GOT_DTPREL16_DS: 14278 case R_PPC64_GOT_DTPREL16_LO_DS: 14279 case R_PPC64_GOT_DTPREL16_HI: 14280 case R_PPC64_GOT_DTPREL16_HA: 14281 tls_type = TLS_TLS | TLS_DTPREL; 14282 goto dogot; 14283 14284 case R_PPC64_GOT16: 14285 case R_PPC64_GOT16_LO: 14286 case R_PPC64_GOT16_HI: 14287 case R_PPC64_GOT16_HA: 14288 case R_PPC64_GOT16_DS: 14289 case R_PPC64_GOT16_LO_DS: 14290 dogot: 14291 { 14292 /* Relocation is to the entry for this symbol in the global 14293 offset table. */ 14294 asection *got; 14295 bfd_vma *offp; 14296 bfd_vma off; 14297 unsigned long indx = 0; 14298 struct got_entry *ent; 14299 14300 if (tls_type == (TLS_TLS | TLS_LD) 14301 && (h == NULL 14302 || !h->elf.def_dynamic)) 14303 ent = ppc64_tlsld_got (input_bfd); 14304 else 14305 { 14306 14307 if (h != NULL) 14308 { 14309 bfd_boolean dyn = htab->elf.dynamic_sections_created; 14310 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), 14311 &h->elf) 14312 || (bfd_link_pic (info) 14313 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))) 14314 /* This is actually a static link, or it is a 14315 -Bsymbolic link and the symbol is defined 14316 locally, or the symbol was forced to be local 14317 because of a version file. */ 14318 ; 14319 else 14320 { 14321 BFD_ASSERT (h->elf.dynindx != -1); 14322 indx = h->elf.dynindx; 14323 unresolved_reloc = FALSE; 14324 } 14325 ent = h->elf.got.glist; 14326 } 14327 else 14328 { 14329 if (local_got_ents == NULL) 14330 abort (); 14331 ent = local_got_ents[r_symndx]; 14332 } 14333 14334 for (; ent != NULL; ent = ent->next) 14335 if (ent->addend == orig_rel.r_addend 14336 && ent->owner == input_bfd 14337 && ent->tls_type == tls_type) 14338 break; 14339 } 14340 14341 if (ent == NULL) 14342 abort (); 14343 if (ent->is_indirect) 14344 ent = ent->got.ent; 14345 offp = &ent->got.offset; 14346 got = ppc64_elf_tdata (ent->owner)->got; 14347 if (got == NULL) 14348 abort (); 14349 14350 /* The offset must always be a multiple of 8. We use the 14351 least significant bit to record whether we have already 14352 processed this entry. */ 14353 off = *offp; 14354 if ((off & 1) != 0) 14355 off &= ~1; 14356 else 14357 { 14358 /* Generate relocs for the dynamic linker, except in 14359 the case of TLSLD where we'll use one entry per 14360 module. */ 14361 asection *relgot; 14362 bfd_boolean ifunc; 14363 14364 *offp = off | 1; 14365 relgot = NULL; 14366 ifunc = (h != NULL 14367 ? h->elf.type == STT_GNU_IFUNC 14368 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC); 14369 if (ifunc) 14370 relgot = htab->elf.irelplt; 14371 else if ((bfd_link_pic (info) || indx != 0) 14372 && (h == NULL 14373 || (tls_type == (TLS_TLS | TLS_LD) 14374 && !h->elf.def_dynamic) 14375 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT 14376 || h->elf.root.type != bfd_link_hash_undefweak)) 14377 relgot = ppc64_elf_tdata (ent->owner)->relgot; 14378 if (relgot != NULL) 14379 { 14380 outrel.r_offset = (got->output_section->vma 14381 + got->output_offset 14382 + off); 14383 outrel.r_addend = addend; 14384 if (tls_type & (TLS_LD | TLS_GD)) 14385 { 14386 outrel.r_addend = 0; 14387 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); 14388 if (tls_type == (TLS_TLS | TLS_GD)) 14389 { 14390 loc = relgot->contents; 14391 loc += (relgot->reloc_count++ 14392 * sizeof (Elf64_External_Rela)); 14393 bfd_elf64_swap_reloca_out (output_bfd, 14394 &outrel, loc); 14395 outrel.r_offset += 8; 14396 outrel.r_addend = addend; 14397 outrel.r_info 14398 = ELF64_R_INFO (indx, R_PPC64_DTPREL64); 14399 } 14400 } 14401 else if (tls_type == (TLS_TLS | TLS_DTPREL)) 14402 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); 14403 else if (tls_type == (TLS_TLS | TLS_TPREL)) 14404 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); 14405 else if (indx != 0) 14406 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); 14407 else 14408 { 14409 if (ifunc) 14410 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); 14411 else 14412 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 14413 14414 /* Write the .got section contents for the sake 14415 of prelink. */ 14416 loc = got->contents + off; 14417 bfd_put_64 (output_bfd, outrel.r_addend + relocation, 14418 loc); 14419 } 14420 14421 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) 14422 { 14423 outrel.r_addend += relocation; 14424 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 14425 { 14426 if (htab->elf.tls_sec == NULL) 14427 outrel.r_addend = 0; 14428 else 14429 outrel.r_addend -= htab->elf.tls_sec->vma; 14430 } 14431 } 14432 loc = relgot->contents; 14433 loc += (relgot->reloc_count++ 14434 * sizeof (Elf64_External_Rela)); 14435 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 14436 } 14437 14438 /* Init the .got section contents here if we're not 14439 emitting a reloc. */ 14440 else 14441 { 14442 relocation += addend; 14443 if (tls_type == (TLS_TLS | TLS_LD)) 14444 relocation = 1; 14445 else if (tls_type != 0) 14446 { 14447 if (htab->elf.tls_sec == NULL) 14448 relocation = 0; 14449 else 14450 { 14451 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; 14452 if (tls_type == (TLS_TLS | TLS_TPREL)) 14453 relocation += DTP_OFFSET - TP_OFFSET; 14454 } 14455 14456 if (tls_type == (TLS_TLS | TLS_GD)) 14457 { 14458 bfd_put_64 (output_bfd, relocation, 14459 got->contents + off + 8); 14460 relocation = 1; 14461 } 14462 } 14463 14464 bfd_put_64 (output_bfd, relocation, 14465 got->contents + off); 14466 } 14467 } 14468 14469 if (off >= (bfd_vma) -2) 14470 abort (); 14471 14472 relocation = got->output_section->vma + got->output_offset + off; 14473 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off); 14474 } 14475 break; 14476 14477 case R_PPC64_PLT16_HA: 14478 case R_PPC64_PLT16_HI: 14479 case R_PPC64_PLT16_LO: 14480 case R_PPC64_PLT32: 14481 case R_PPC64_PLT64: 14482 /* Relocation is to the entry for this symbol in the 14483 procedure linkage table. */ 14484 { 14485 struct plt_entry **plt_list = NULL; 14486 if (h != NULL) 14487 plt_list = &h->elf.plt.plist; 14488 else if (local_got_ents != NULL) 14489 { 14490 struct plt_entry **local_plt = (struct plt_entry **) 14491 (local_got_ents + symtab_hdr->sh_info); 14492 unsigned char *local_got_tls_masks = (unsigned char *) 14493 (local_plt + symtab_hdr->sh_info); 14494 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 14495 plt_list = local_plt + r_symndx; 14496 } 14497 if (plt_list) 14498 { 14499 struct plt_entry *ent; 14500 14501 for (ent = *plt_list; ent != NULL; ent = ent->next) 14502 if (ent->plt.offset != (bfd_vma) -1 14503 && ent->addend == orig_rel.r_addend) 14504 { 14505 asection *plt; 14506 14507 plt = htab->elf.splt; 14508 if (!htab->elf.dynamic_sections_created 14509 || h == NULL 14510 || h->elf.dynindx == -1) 14511 plt = htab->elf.iplt; 14512 relocation = (plt->output_section->vma 14513 + plt->output_offset 14514 + ent->plt.offset); 14515 addend = 0; 14516 unresolved_reloc = FALSE; 14517 break; 14518 } 14519 } 14520 } 14521 break; 14522 14523 case R_PPC64_TOC: 14524 /* Relocation value is TOC base. */ 14525 relocation = TOCstart; 14526 if (r_symndx == STN_UNDEF) 14527 relocation += htab->sec_info[input_section->id].toc_off; 14528 else if (unresolved_reloc) 14529 ; 14530 else if (sec != NULL && sec->id < htab->sec_info_arr_size) 14531 relocation += htab->sec_info[sec->id].toc_off; 14532 else 14533 unresolved_reloc = TRUE; 14534 goto dodyn; 14535 14536 /* TOC16 relocs. We want the offset relative to the TOC base, 14537 which is the address of the start of the TOC plus 0x8000. 14538 The TOC consists of sections .got, .toc, .tocbss, and .plt, 14539 in this order. */ 14540 case R_PPC64_TOC16: 14541 case R_PPC64_TOC16_LO: 14542 case R_PPC64_TOC16_HI: 14543 case R_PPC64_TOC16_DS: 14544 case R_PPC64_TOC16_LO_DS: 14545 case R_PPC64_TOC16_HA: 14546 addend -= TOCstart + htab->sec_info[input_section->id].toc_off; 14547 break; 14548 14549 /* Relocate against the beginning of the section. */ 14550 case R_PPC64_SECTOFF: 14551 case R_PPC64_SECTOFF_LO: 14552 case R_PPC64_SECTOFF_HI: 14553 case R_PPC64_SECTOFF_DS: 14554 case R_PPC64_SECTOFF_LO_DS: 14555 case R_PPC64_SECTOFF_HA: 14556 if (sec != NULL) 14557 addend -= sec->output_section->vma; 14558 break; 14559 14560 case R_PPC64_REL16: 14561 case R_PPC64_REL16_LO: 14562 case R_PPC64_REL16_HI: 14563 case R_PPC64_REL16_HA: 14564 case R_PPC64_REL16DX_HA: 14565 break; 14566 14567 case R_PPC64_REL14: 14568 case R_PPC64_REL14_BRNTAKEN: 14569 case R_PPC64_REL14_BRTAKEN: 14570 case R_PPC64_REL24: 14571 break; 14572 14573 case R_PPC64_TPREL16: 14574 case R_PPC64_TPREL16_LO: 14575 case R_PPC64_TPREL16_HI: 14576 case R_PPC64_TPREL16_HA: 14577 case R_PPC64_TPREL16_DS: 14578 case R_PPC64_TPREL16_LO_DS: 14579 case R_PPC64_TPREL16_HIGH: 14580 case R_PPC64_TPREL16_HIGHA: 14581 case R_PPC64_TPREL16_HIGHER: 14582 case R_PPC64_TPREL16_HIGHERA: 14583 case R_PPC64_TPREL16_HIGHEST: 14584 case R_PPC64_TPREL16_HIGHESTA: 14585 if (h != NULL 14586 && h->elf.root.type == bfd_link_hash_undefweak 14587 && h->elf.dynindx == -1) 14588 { 14589 /* Make this relocation against an undefined weak symbol 14590 resolve to zero. This is really just a tweak, since 14591 code using weak externs ought to check that they are 14592 defined before using them. */ 14593 bfd_byte *p = contents + rel->r_offset - d_offset; 14594 14595 insn = bfd_get_32 (output_bfd, p); 14596 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); 14597 if (insn != 0) 14598 bfd_put_32 (output_bfd, insn, p); 14599 break; 14600 } 14601 if (htab->elf.tls_sec != NULL) 14602 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 14603 if (bfd_link_pic (info)) 14604 /* The TPREL16 relocs shouldn't really be used in shared 14605 libs as they will result in DT_TEXTREL being set, but 14606 support them anyway. */ 14607 goto dodyn; 14608 break; 14609 14610 case R_PPC64_DTPREL16: 14611 case R_PPC64_DTPREL16_LO: 14612 case R_PPC64_DTPREL16_HI: 14613 case R_PPC64_DTPREL16_HA: 14614 case R_PPC64_DTPREL16_DS: 14615 case R_PPC64_DTPREL16_LO_DS: 14616 case R_PPC64_DTPREL16_HIGH: 14617 case R_PPC64_DTPREL16_HIGHA: 14618 case R_PPC64_DTPREL16_HIGHER: 14619 case R_PPC64_DTPREL16_HIGHERA: 14620 case R_PPC64_DTPREL16_HIGHEST: 14621 case R_PPC64_DTPREL16_HIGHESTA: 14622 if (htab->elf.tls_sec != NULL) 14623 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 14624 break; 14625 14626 case R_PPC64_ADDR64_LOCAL: 14627 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL 14628 ? h->elf.other 14629 : sym->st_other); 14630 break; 14631 14632 case R_PPC64_DTPMOD64: 14633 relocation = 1; 14634 addend = 0; 14635 goto dodyn; 14636 14637 case R_PPC64_TPREL64: 14638 if (htab->elf.tls_sec != NULL) 14639 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 14640 goto dodyn; 14641 14642 case R_PPC64_DTPREL64: 14643 if (htab->elf.tls_sec != NULL) 14644 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 14645 /* Fall thru */ 14646 14647 /* Relocations that may need to be propagated if this is a 14648 dynamic object. */ 14649 case R_PPC64_REL30: 14650 case R_PPC64_REL32: 14651 case R_PPC64_REL64: 14652 case R_PPC64_ADDR14: 14653 case R_PPC64_ADDR14_BRNTAKEN: 14654 case R_PPC64_ADDR14_BRTAKEN: 14655 case R_PPC64_ADDR16: 14656 case R_PPC64_ADDR16_DS: 14657 case R_PPC64_ADDR16_HA: 14658 case R_PPC64_ADDR16_HI: 14659 case R_PPC64_ADDR16_HIGH: 14660 case R_PPC64_ADDR16_HIGHA: 14661 case R_PPC64_ADDR16_HIGHER: 14662 case R_PPC64_ADDR16_HIGHERA: 14663 case R_PPC64_ADDR16_HIGHEST: 14664 case R_PPC64_ADDR16_HIGHESTA: 14665 case R_PPC64_ADDR16_LO: 14666 case R_PPC64_ADDR16_LO_DS: 14667 case R_PPC64_ADDR24: 14668 case R_PPC64_ADDR32: 14669 case R_PPC64_ADDR64: 14670 case R_PPC64_UADDR16: 14671 case R_PPC64_UADDR32: 14672 case R_PPC64_UADDR64: 14673 dodyn: 14674 if ((input_section->flags & SEC_ALLOC) == 0) 14675 break; 14676 14677 if (NO_OPD_RELOCS && is_opd) 14678 break; 14679 14680 if ((bfd_link_pic (info) 14681 && (h == NULL 14682 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT 14683 || h->elf.root.type != bfd_link_hash_undefweak) 14684 && (must_be_dyn_reloc (info, r_type) 14685 || !SYMBOL_CALLS_LOCAL (info, &h->elf))) 14686 || (ELIMINATE_COPY_RELOCS 14687 && !bfd_link_pic (info) 14688 && h != NULL 14689 && h->elf.dynindx != -1 14690 && !h->elf.non_got_ref 14691 && !h->elf.def_regular) 14692 || (!bfd_link_pic (info) 14693 && (h != NULL 14694 ? h->elf.type == STT_GNU_IFUNC 14695 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))) 14696 { 14697 bfd_boolean skip, relocate; 14698 asection *sreloc; 14699 bfd_vma out_off; 14700 14701 /* When generating a dynamic object, these relocations 14702 are copied into the output file to be resolved at run 14703 time. */ 14704 14705 skip = FALSE; 14706 relocate = FALSE; 14707 14708 out_off = _bfd_elf_section_offset (output_bfd, info, 14709 input_section, rel->r_offset); 14710 if (out_off == (bfd_vma) -1) 14711 skip = TRUE; 14712 else if (out_off == (bfd_vma) -2) 14713 skip = TRUE, relocate = TRUE; 14714 out_off += (input_section->output_section->vma 14715 + input_section->output_offset); 14716 outrel.r_offset = out_off; 14717 outrel.r_addend = rel->r_addend; 14718 14719 /* Optimize unaligned reloc use. */ 14720 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) 14721 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) 14722 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; 14723 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) 14724 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) 14725 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; 14726 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) 14727 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) 14728 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; 14729 14730 if (skip) 14731 memset (&outrel, 0, sizeof outrel); 14732 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf) 14733 && !is_opd 14734 && r_type != R_PPC64_TOC) 14735 { 14736 BFD_ASSERT (h->elf.dynindx != -1); 14737 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type); 14738 } 14739 else 14740 { 14741 /* This symbol is local, or marked to become local, 14742 or this is an opd section reloc which must point 14743 at a local function. */ 14744 outrel.r_addend += relocation; 14745 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) 14746 { 14747 if (is_opd && h != NULL) 14748 { 14749 /* Lie about opd entries. This case occurs 14750 when building shared libraries and we 14751 reference a function in another shared 14752 lib. The same thing happens for a weak 14753 definition in an application that's 14754 overridden by a strong definition in a 14755 shared lib. (I believe this is a generic 14756 bug in binutils handling of weak syms.) 14757 In these cases we won't use the opd 14758 entry in this lib. */ 14759 unresolved_reloc = FALSE; 14760 } 14761 if (!is_opd 14762 && r_type == R_PPC64_ADDR64 14763 && (h != NULL 14764 ? h->elf.type == STT_GNU_IFUNC 14765 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) 14766 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); 14767 else 14768 { 14769 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 14770 14771 /* We need to relocate .opd contents for ld.so. 14772 Prelink also wants simple and consistent rules 14773 for relocs. This make all RELATIVE relocs have 14774 *r_offset equal to r_addend. */ 14775 relocate = TRUE; 14776 } 14777 } 14778 else 14779 { 14780 long indx = 0; 14781 14782 if (h != NULL 14783 ? h->elf.type == STT_GNU_IFUNC 14784 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 14785 { 14786 info->callbacks->einfo 14787 (_("%P: %H: %s for indirect " 14788 "function `%T' unsupported\n"), 14789 input_bfd, input_section, rel->r_offset, 14790 ppc64_elf_howto_table[r_type]->name, 14791 sym_name); 14792 ret = FALSE; 14793 } 14794 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 14795 ; 14796 else if (sec == NULL || sec->owner == NULL) 14797 { 14798 bfd_set_error (bfd_error_bad_value); 14799 return FALSE; 14800 } 14801 else 14802 { 14803 asection *osec; 14804 14805 osec = sec->output_section; 14806 indx = elf_section_data (osec)->dynindx; 14807 14808 if (indx == 0) 14809 { 14810 if ((osec->flags & SEC_READONLY) == 0 14811 && htab->elf.data_index_section != NULL) 14812 osec = htab->elf.data_index_section; 14813 else 14814 osec = htab->elf.text_index_section; 14815 indx = elf_section_data (osec)->dynindx; 14816 } 14817 BFD_ASSERT (indx != 0); 14818 14819 /* We are turning this relocation into one 14820 against a section symbol, so subtract out 14821 the output section's address but not the 14822 offset of the input section in the output 14823 section. */ 14824 outrel.r_addend -= osec->vma; 14825 } 14826 14827 outrel.r_info = ELF64_R_INFO (indx, r_type); 14828 } 14829 } 14830 14831 sreloc = elf_section_data (input_section)->sreloc; 14832 if (h != NULL 14833 ? h->elf.type == STT_GNU_IFUNC 14834 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 14835 sreloc = htab->elf.irelplt; 14836 if (sreloc == NULL) 14837 abort (); 14838 14839 if (sreloc->reloc_count * sizeof (Elf64_External_Rela) 14840 >= sreloc->size) 14841 abort (); 14842 loc = sreloc->contents; 14843 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 14844 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 14845 14846 /* If this reloc is against an external symbol, it will 14847 be computed at runtime, so there's no need to do 14848 anything now. However, for the sake of prelink ensure 14849 that the section contents are a known value. */ 14850 if (! relocate) 14851 { 14852 unresolved_reloc = FALSE; 14853 /* The value chosen here is quite arbitrary as ld.so 14854 ignores section contents except for the special 14855 case of .opd where the contents might be accessed 14856 before relocation. Choose zero, as that won't 14857 cause reloc overflow. */ 14858 relocation = 0; 14859 addend = 0; 14860 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs 14861 to improve backward compatibility with older 14862 versions of ld. */ 14863 if (r_type == R_PPC64_ADDR64) 14864 addend = outrel.r_addend; 14865 /* Adjust pc_relative relocs to have zero in *r_offset. */ 14866 else if (ppc64_elf_howto_table[r_type]->pc_relative) 14867 addend = (input_section->output_section->vma 14868 + input_section->output_offset 14869 + rel->r_offset); 14870 } 14871 } 14872 break; 14873 14874 case R_PPC64_COPY: 14875 case R_PPC64_GLOB_DAT: 14876 case R_PPC64_JMP_SLOT: 14877 case R_PPC64_JMP_IREL: 14878 case R_PPC64_RELATIVE: 14879 /* We shouldn't ever see these dynamic relocs in relocatable 14880 files. */ 14881 /* Fall through. */ 14882 14883 case R_PPC64_PLTGOT16: 14884 case R_PPC64_PLTGOT16_DS: 14885 case R_PPC64_PLTGOT16_HA: 14886 case R_PPC64_PLTGOT16_HI: 14887 case R_PPC64_PLTGOT16_LO: 14888 case R_PPC64_PLTGOT16_LO_DS: 14889 case R_PPC64_PLTREL32: 14890 case R_PPC64_PLTREL64: 14891 /* These ones haven't been implemented yet. */ 14892 14893 info->callbacks->einfo 14894 (_("%P: %B: %s is not supported for `%T'\n"), 14895 input_bfd, 14896 ppc64_elf_howto_table[r_type]->name, sym_name); 14897 14898 bfd_set_error (bfd_error_invalid_operation); 14899 ret = FALSE; 14900 goto copy_reloc; 14901 } 14902 14903 /* Multi-instruction sequences that access the TOC can be 14904 optimized, eg. addis ra,r2,0; addi rb,ra,x; 14905 to nop; addi rb,r2,x; */ 14906 switch (r_type) 14907 { 14908 default: 14909 break; 14910 14911 case R_PPC64_GOT_TLSLD16_HI: 14912 case R_PPC64_GOT_TLSGD16_HI: 14913 case R_PPC64_GOT_TPREL16_HI: 14914 case R_PPC64_GOT_DTPREL16_HI: 14915 case R_PPC64_GOT16_HI: 14916 case R_PPC64_TOC16_HI: 14917 /* These relocs would only be useful if building up an 14918 offset to later add to r2, perhaps in an indexed 14919 addressing mode instruction. Don't try to optimize. 14920 Unfortunately, the possibility of someone building up an 14921 offset like this or even with the HA relocs, means that 14922 we need to check the high insn when optimizing the low 14923 insn. */ 14924 break; 14925 14926 case R_PPC64_GOT_TLSLD16_HA: 14927 case R_PPC64_GOT_TLSGD16_HA: 14928 case R_PPC64_GOT_TPREL16_HA: 14929 case R_PPC64_GOT_DTPREL16_HA: 14930 case R_PPC64_GOT16_HA: 14931 case R_PPC64_TOC16_HA: 14932 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 14933 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) 14934 { 14935 bfd_byte *p = contents + (rel->r_offset & ~3); 14936 bfd_put_32 (input_bfd, NOP, p); 14937 } 14938 break; 14939 14940 case R_PPC64_GOT_TLSLD16_LO: 14941 case R_PPC64_GOT_TLSGD16_LO: 14942 case R_PPC64_GOT_TPREL16_LO_DS: 14943 case R_PPC64_GOT_DTPREL16_LO_DS: 14944 case R_PPC64_GOT16_LO: 14945 case R_PPC64_GOT16_LO_DS: 14946 case R_PPC64_TOC16_LO: 14947 case R_PPC64_TOC16_LO_DS: 14948 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 14949 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) 14950 { 14951 bfd_byte *p = contents + (rel->r_offset & ~3); 14952 insn = bfd_get_32 (input_bfd, p); 14953 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) 14954 { 14955 /* Transform addic to addi when we change reg. */ 14956 insn &= ~((0x3f << 26) | (0x1f << 16)); 14957 insn |= (14u << 26) | (2 << 16); 14958 } 14959 else 14960 { 14961 insn &= ~(0x1f << 16); 14962 insn |= 2 << 16; 14963 } 14964 bfd_put_32 (input_bfd, insn, p); 14965 } 14966 break; 14967 } 14968 14969 /* Do any further special processing. */ 14970 howto = ppc64_elf_howto_table[(int) r_type]; 14971 switch (r_type) 14972 { 14973 default: 14974 break; 14975 14976 case R_PPC64_REL16_HA: 14977 case R_PPC64_REL16DX_HA: 14978 case R_PPC64_ADDR16_HA: 14979 case R_PPC64_ADDR16_HIGHA: 14980 case R_PPC64_ADDR16_HIGHERA: 14981 case R_PPC64_ADDR16_HIGHESTA: 14982 case R_PPC64_TOC16_HA: 14983 case R_PPC64_SECTOFF_HA: 14984 case R_PPC64_TPREL16_HA: 14985 case R_PPC64_TPREL16_HIGHA: 14986 case R_PPC64_TPREL16_HIGHERA: 14987 case R_PPC64_TPREL16_HIGHESTA: 14988 case R_PPC64_DTPREL16_HA: 14989 case R_PPC64_DTPREL16_HIGHA: 14990 case R_PPC64_DTPREL16_HIGHERA: 14991 case R_PPC64_DTPREL16_HIGHESTA: 14992 /* It's just possible that this symbol is a weak symbol 14993 that's not actually defined anywhere. In that case, 14994 'sec' would be NULL, and we should leave the symbol 14995 alone (it will be set to zero elsewhere in the link). */ 14996 if (sec == NULL) 14997 break; 14998 /* Fall thru */ 14999 15000 case R_PPC64_GOT16_HA: 15001 case R_PPC64_PLTGOT16_HA: 15002 case R_PPC64_PLT16_HA: 15003 case R_PPC64_GOT_TLSGD16_HA: 15004 case R_PPC64_GOT_TLSLD16_HA: 15005 case R_PPC64_GOT_TPREL16_HA: 15006 case R_PPC64_GOT_DTPREL16_HA: 15007 /* Add 0x10000 if sign bit in 0:15 is set. 15008 Bits 0:15 are not used. */ 15009 addend += 0x8000; 15010 break; 15011 15012 case R_PPC64_ADDR16_DS: 15013 case R_PPC64_ADDR16_LO_DS: 15014 case R_PPC64_GOT16_DS: 15015 case R_PPC64_GOT16_LO_DS: 15016 case R_PPC64_PLT16_LO_DS: 15017 case R_PPC64_SECTOFF_DS: 15018 case R_PPC64_SECTOFF_LO_DS: 15019 case R_PPC64_TOC16_DS: 15020 case R_PPC64_TOC16_LO_DS: 15021 case R_PPC64_PLTGOT16_DS: 15022 case R_PPC64_PLTGOT16_LO_DS: 15023 case R_PPC64_GOT_TPREL16_DS: 15024 case R_PPC64_GOT_TPREL16_LO_DS: 15025 case R_PPC64_GOT_DTPREL16_DS: 15026 case R_PPC64_GOT_DTPREL16_LO_DS: 15027 case R_PPC64_TPREL16_DS: 15028 case R_PPC64_TPREL16_LO_DS: 15029 case R_PPC64_DTPREL16_DS: 15030 case R_PPC64_DTPREL16_LO_DS: 15031 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 15032 mask = 3; 15033 /* If this reloc is against an lq, lxv, or stxv insn, then 15034 the value must be a multiple of 16. This is somewhat of 15035 a hack, but the "correct" way to do this by defining _DQ 15036 forms of all the _DS relocs bloats all reloc switches in 15037 this file. It doesn't make much sense to use these 15038 relocs in data, so testing the insn should be safe. */ 15039 if ((insn & (0x3f << 26)) == (56u << 26) 15040 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1)) 15041 mask = 15; 15042 relocation += addend; 15043 addend = insn & (mask ^ 3); 15044 if ((relocation & mask) != 0) 15045 { 15046 relocation ^= relocation & mask; 15047 info->callbacks->einfo 15048 (_("%P: %H: error: %s not a multiple of %u\n"), 15049 input_bfd, input_section, rel->r_offset, 15050 howto->name, 15051 mask + 1); 15052 bfd_set_error (bfd_error_bad_value); 15053 ret = FALSE; 15054 goto copy_reloc; 15055 } 15056 break; 15057 } 15058 15059 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 15060 because such sections are not SEC_ALLOC and thus ld.so will 15061 not process them. */ 15062 if (unresolved_reloc 15063 && !((input_section->flags & SEC_DEBUGGING) != 0 15064 && h->elf.def_dynamic) 15065 && _bfd_elf_section_offset (output_bfd, info, input_section, 15066 rel->r_offset) != (bfd_vma) -1) 15067 { 15068 info->callbacks->einfo 15069 (_("%P: %H: unresolvable %s against `%T'\n"), 15070 input_bfd, input_section, rel->r_offset, 15071 howto->name, 15072 h->elf.root.root.string); 15073 ret = FALSE; 15074 } 15075 15076 /* 16-bit fields in insns mostly have signed values, but a 15077 few insns have 16-bit unsigned values. Really, we should 15078 have different reloc types. */ 15079 if (howto->complain_on_overflow != complain_overflow_dont 15080 && howto->dst_mask == 0xffff 15081 && (input_section->flags & SEC_CODE) != 0) 15082 { 15083 enum complain_overflow complain = complain_overflow_signed; 15084 15085 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 15086 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) 15087 complain = complain_overflow_bitfield; 15088 else if (howto->rightshift == 0 15089 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ 15090 || (insn & (0x3f << 26)) == 24u << 26 /* ori */ 15091 || (insn & (0x3f << 26)) == 26u << 26 /* xori */) 15092 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ 15093 || (insn & (0x3f << 26)) == 25u << 26 /* oris */ 15094 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) 15095 complain = complain_overflow_unsigned; 15096 if (howto->complain_on_overflow != complain) 15097 { 15098 alt_howto = *howto; 15099 alt_howto.complain_on_overflow = complain; 15100 howto = &alt_howto; 15101 } 15102 } 15103 15104 if (r_type == R_PPC64_REL16DX_HA) 15105 { 15106 /* Split field reloc isn't handled by _bfd_final_link_relocate. */ 15107 if (rel->r_offset + 4 > input_section->size) 15108 r = bfd_reloc_outofrange; 15109 else 15110 { 15111 relocation += addend; 15112 relocation -= (rel->r_offset 15113 + input_section->output_offset 15114 + input_section->output_section->vma); 15115 relocation = (bfd_signed_vma) relocation >> 16; 15116 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 15117 insn &= ~0x1fffc1; 15118 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); 15119 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 15120 r = bfd_reloc_ok; 15121 if (relocation + 0x8000 > 0xffff) 15122 r = bfd_reloc_overflow; 15123 } 15124 } 15125 else 15126 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 15127 rel->r_offset, relocation, addend); 15128 15129 if (r != bfd_reloc_ok) 15130 { 15131 char *more_info = NULL; 15132 const char *reloc_name = howto->name; 15133 15134 if (reloc_dest != DEST_NORMAL) 15135 { 15136 more_info = bfd_malloc (strlen (reloc_name) + 8); 15137 if (more_info != NULL) 15138 { 15139 strcpy (more_info, reloc_name); 15140 strcat (more_info, (reloc_dest == DEST_OPD 15141 ? " (OPD)" : " (stub)")); 15142 reloc_name = more_info; 15143 } 15144 } 15145 15146 if (r == bfd_reloc_overflow) 15147 { 15148 /* On code like "if (foo) foo();" don't report overflow 15149 on a branch to zero when foo is undefined. */ 15150 if (!warned 15151 && (reloc_dest == DEST_STUB 15152 || !(h != NULL 15153 && (h->elf.root.type == bfd_link_hash_undefweak 15154 || h->elf.root.type == bfd_link_hash_undefined) 15155 && is_branch_reloc (r_type)))) 15156 info->callbacks->reloc_overflow (info, &h->elf.root, 15157 sym_name, reloc_name, 15158 orig_rel.r_addend, 15159 input_bfd, input_section, 15160 rel->r_offset); 15161 } 15162 else 15163 { 15164 info->callbacks->einfo 15165 (_("%P: %H: %s against `%T': error %d\n"), 15166 input_bfd, input_section, rel->r_offset, 15167 reloc_name, sym_name, (int) r); 15168 ret = FALSE; 15169 } 15170 if (more_info != NULL) 15171 free (more_info); 15172 } 15173 copy_reloc: 15174 if (wrel != rel) 15175 *wrel = *rel; 15176 } 15177 15178 if (wrel != rel) 15179 { 15180 Elf_Internal_Shdr *rel_hdr; 15181 size_t deleted = rel - wrel; 15182 15183 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); 15184 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 15185 if (rel_hdr->sh_size == 0) 15186 { 15187 /* It is too late to remove an empty reloc section. Leave 15188 one NONE reloc. 15189 ??? What is wrong with an empty section??? */ 15190 rel_hdr->sh_size = rel_hdr->sh_entsize; 15191 deleted -= 1; 15192 } 15193 rel_hdr = _bfd_elf_single_rel_hdr (input_section); 15194 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 15195 input_section->reloc_count -= deleted; 15196 } 15197 15198 /* If we're emitting relocations, then shortly after this function 15199 returns, reloc offsets and addends for this section will be 15200 adjusted. Worse, reloc symbol indices will be for the output 15201 file rather than the input. Save a copy of the relocs for 15202 opd_entry_value. */ 15203 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info))) 15204 { 15205 bfd_size_type amt; 15206 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); 15207 rel = bfd_alloc (input_bfd, amt); 15208 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL); 15209 ppc64_elf_tdata (input_bfd)->opd.relocs = rel; 15210 if (rel == NULL) 15211 return FALSE; 15212 memcpy (rel, relocs, amt); 15213 } 15214 return ret; 15215} 15216 15217/* Adjust the value of any local symbols in opd sections. */ 15218 15219static int 15220ppc64_elf_output_symbol_hook (struct bfd_link_info *info, 15221 const char *name ATTRIBUTE_UNUSED, 15222 Elf_Internal_Sym *elfsym, 15223 asection *input_sec, 15224 struct elf_link_hash_entry *h) 15225{ 15226 struct _opd_sec_data *opd; 15227 long adjust; 15228 bfd_vma value; 15229 15230 if (h != NULL) 15231 return 1; 15232 15233 opd = get_opd_info (input_sec); 15234 if (opd == NULL || opd->adjust == NULL) 15235 return 1; 15236 15237 value = elfsym->st_value - input_sec->output_offset; 15238 if (!bfd_link_relocatable (info)) 15239 value -= input_sec->output_section->vma; 15240 15241 adjust = opd->adjust[OPD_NDX (value)]; 15242 if (adjust == -1) 15243 return 2; 15244 15245 elfsym->st_value += adjust; 15246 return 1; 15247} 15248 15249/* Finish up dynamic symbol handling. We set the contents of various 15250 dynamic sections here. */ 15251 15252static bfd_boolean 15253ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, 15254 struct bfd_link_info *info, 15255 struct elf_link_hash_entry *h, 15256 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) 15257{ 15258 struct ppc_link_hash_table *htab; 15259 struct plt_entry *ent; 15260 Elf_Internal_Rela rela; 15261 bfd_byte *loc; 15262 15263 htab = ppc_hash_table (info); 15264 if (htab == NULL) 15265 return FALSE; 15266 15267 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 15268 if (ent->plt.offset != (bfd_vma) -1) 15269 { 15270 /* This symbol has an entry in the procedure linkage 15271 table. Set it up. */ 15272 if (!htab->elf.dynamic_sections_created 15273 || h->dynindx == -1) 15274 { 15275 BFD_ASSERT (h->type == STT_GNU_IFUNC 15276 && h->def_regular 15277 && (h->root.type == bfd_link_hash_defined 15278 || h->root.type == bfd_link_hash_defweak)); 15279 rela.r_offset = (htab->elf.iplt->output_section->vma 15280 + htab->elf.iplt->output_offset 15281 + ent->plt.offset); 15282 if (htab->opd_abi) 15283 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); 15284 else 15285 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); 15286 rela.r_addend = (h->root.u.def.value 15287 + h->root.u.def.section->output_offset 15288 + h->root.u.def.section->output_section->vma 15289 + ent->addend); 15290 loc = (htab->elf.irelplt->contents 15291 + (htab->elf.irelplt->reloc_count++ 15292 * sizeof (Elf64_External_Rela))); 15293 } 15294 else 15295 { 15296 rela.r_offset = (htab->elf.splt->output_section->vma 15297 + htab->elf.splt->output_offset 15298 + ent->plt.offset); 15299 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); 15300 rela.r_addend = ent->addend; 15301 loc = (htab->elf.srelplt->contents 15302 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab)) 15303 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela))); 15304 } 15305 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 15306 15307 if (!htab->opd_abi) 15308 { 15309 if (!h->def_regular) 15310 { 15311 /* Mark the symbol as undefined, rather than as 15312 defined in glink. Leave the value if there were 15313 any relocations where pointer equality matters 15314 (this is a clue for the dynamic linker, to make 15315 function pointer comparisons work between an 15316 application and shared library), otherwise set it 15317 to zero. */ 15318 sym->st_shndx = SHN_UNDEF; 15319 if (!h->pointer_equality_needed) 15320 sym->st_value = 0; 15321 else if (!h->ref_regular_nonweak) 15322 { 15323 /* This breaks function pointer comparisons, but 15324 that is better than breaking tests for a NULL 15325 function pointer. */ 15326 sym->st_value = 0; 15327 } 15328 } 15329 } 15330 } 15331 15332 if (h->needs_copy) 15333 { 15334 /* This symbol needs a copy reloc. Set it up. */ 15335 15336 if (h->dynindx == -1 15337 || (h->root.type != bfd_link_hash_defined 15338 && h->root.type != bfd_link_hash_defweak) 15339 || htab->relbss == NULL) 15340 abort (); 15341 15342 rela.r_offset = (h->root.u.def.value 15343 + h->root.u.def.section->output_section->vma 15344 + h->root.u.def.section->output_offset); 15345 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); 15346 rela.r_addend = 0; 15347 loc = htab->relbss->contents; 15348 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela); 15349 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 15350 } 15351 15352 return TRUE; 15353} 15354 15355/* Used to decide how to sort relocs in an optimal manner for the 15356 dynamic linker, before writing them out. */ 15357 15358static enum elf_reloc_type_class 15359ppc64_elf_reloc_type_class (const struct bfd_link_info *info, 15360 const asection *rel_sec, 15361 const Elf_Internal_Rela *rela) 15362{ 15363 enum elf_ppc64_reloc_type r_type; 15364 struct ppc_link_hash_table *htab = ppc_hash_table (info); 15365 15366 if (rel_sec == htab->elf.irelplt) 15367 return reloc_class_ifunc; 15368 15369 r_type = ELF64_R_TYPE (rela->r_info); 15370 switch (r_type) 15371 { 15372 case R_PPC64_RELATIVE: 15373 return reloc_class_relative; 15374 case R_PPC64_JMP_SLOT: 15375 return reloc_class_plt; 15376 case R_PPC64_COPY: 15377 return reloc_class_copy; 15378 default: 15379 return reloc_class_normal; 15380 } 15381} 15382 15383/* Finish up the dynamic sections. */ 15384 15385static bfd_boolean 15386ppc64_elf_finish_dynamic_sections (bfd *output_bfd, 15387 struct bfd_link_info *info) 15388{ 15389 struct ppc_link_hash_table *htab; 15390 bfd *dynobj; 15391 asection *sdyn; 15392 15393 htab = ppc_hash_table (info); 15394 if (htab == NULL) 15395 return FALSE; 15396 15397 dynobj = htab->elf.dynobj; 15398 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 15399 15400 if (htab->elf.dynamic_sections_created) 15401 { 15402 Elf64_External_Dyn *dyncon, *dynconend; 15403 15404 if (sdyn == NULL || htab->elf.sgot == NULL) 15405 abort (); 15406 15407 dyncon = (Elf64_External_Dyn *) sdyn->contents; 15408 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); 15409 for (; dyncon < dynconend; dyncon++) 15410 { 15411 Elf_Internal_Dyn dyn; 15412 asection *s; 15413 15414 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 15415 15416 switch (dyn.d_tag) 15417 { 15418 default: 15419 continue; 15420 15421 case DT_PPC64_GLINK: 15422 s = htab->glink; 15423 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 15424 /* We stupidly defined DT_PPC64_GLINK to be the start 15425 of glink rather than the first entry point, which is 15426 what ld.so needs, and now have a bigger stub to 15427 support automatic multiple TOCs. */ 15428 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4; 15429 break; 15430 15431 case DT_PPC64_OPD: 15432 s = bfd_get_section_by_name (output_bfd, ".opd"); 15433 if (s == NULL) 15434 continue; 15435 dyn.d_un.d_ptr = s->vma; 15436 break; 15437 15438 case DT_PPC64_OPT: 15439 if (htab->do_multi_toc && htab->multi_toc_needed) 15440 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC; 15441 break; 15442 15443 case DT_PPC64_OPDSZ: 15444 s = bfd_get_section_by_name (output_bfd, ".opd"); 15445 if (s == NULL) 15446 continue; 15447 dyn.d_un.d_val = s->size; 15448 break; 15449 15450 case DT_PLTGOT: 15451 s = htab->elf.splt; 15452 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 15453 break; 15454 15455 case DT_JMPREL: 15456 s = htab->elf.srelplt; 15457 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 15458 break; 15459 15460 case DT_PLTRELSZ: 15461 dyn.d_un.d_val = htab->elf.srelplt->size; 15462 break; 15463 15464 case DT_RELASZ: 15465 /* Don't count procedure linkage table relocs in the 15466 overall reloc count. */ 15467 s = htab->elf.srelplt; 15468 if (s == NULL) 15469 continue; 15470 dyn.d_un.d_val -= s->size; 15471 break; 15472 15473 case DT_RELA: 15474 /* We may not be using the standard ELF linker script. 15475 If .rela.plt is the first .rela section, we adjust 15476 DT_RELA to not include it. */ 15477 s = htab->elf.srelplt; 15478 if (s == NULL) 15479 continue; 15480 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) 15481 continue; 15482 dyn.d_un.d_ptr += s->size; 15483 break; 15484 } 15485 15486 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 15487 } 15488 } 15489 15490 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0) 15491 { 15492 /* Fill in the first entry in the global offset table. 15493 We use it to hold the link-time TOCbase. */ 15494 bfd_put_64 (output_bfd, 15495 elf_gp (output_bfd) + TOC_BASE_OFF, 15496 htab->elf.sgot->contents); 15497 15498 /* Set .got entry size. */ 15499 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8; 15500 } 15501 15502 if (htab->elf.splt != NULL && htab->elf.splt->size != 0) 15503 { 15504 /* Set .plt entry size. */ 15505 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize 15506 = PLT_ENTRY_SIZE (htab); 15507 } 15508 15509 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for 15510 brlt ourselves if emitrelocations. */ 15511 if (htab->brlt != NULL 15512 && htab->brlt->reloc_count != 0 15513 && !_bfd_elf_link_output_relocs (output_bfd, 15514 htab->brlt, 15515 elf_section_data (htab->brlt)->rela.hdr, 15516 elf_section_data (htab->brlt)->relocs, 15517 NULL)) 15518 return FALSE; 15519 15520 if (htab->glink != NULL 15521 && htab->glink->reloc_count != 0 15522 && !_bfd_elf_link_output_relocs (output_bfd, 15523 htab->glink, 15524 elf_section_data (htab->glink)->rela.hdr, 15525 elf_section_data (htab->glink)->relocs, 15526 NULL)) 15527 return FALSE; 15528 15529 if (htab->glink_eh_frame != NULL 15530 && htab->glink_eh_frame->size != 0) 15531 { 15532 bfd_vma val; 15533 bfd_byte *p; 15534 asection *stub_sec; 15535 15536 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie); 15537 for (stub_sec = htab->params->stub_bfd->sections; 15538 stub_sec != NULL; 15539 stub_sec = stub_sec->next) 15540 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 15541 { 15542 /* FDE length. */ 15543 p += 4; 15544 /* CIE pointer. */ 15545 p += 4; 15546 /* Offset to stub section. */ 15547 val = (stub_sec->output_section->vma 15548 + stub_sec->output_offset); 15549 val -= (htab->glink_eh_frame->output_section->vma 15550 + htab->glink_eh_frame->output_offset 15551 + (p - htab->glink_eh_frame->contents)); 15552 if (val + 0x80000000 > 0xffffffff) 15553 { 15554 info->callbacks->einfo 15555 (_("%P: %s offset too large for .eh_frame sdata4 encoding"), 15556 stub_sec->name); 15557 return FALSE; 15558 } 15559 bfd_put_32 (dynobj, val, p); 15560 p += 4; 15561 /* stub section size. */ 15562 p += 4; 15563 /* Augmentation. */ 15564 p += 1; 15565 /* Pad. */ 15566 p += 7; 15567 } 15568 if (htab->glink != NULL && htab->glink->size != 0) 15569 { 15570 /* FDE length. */ 15571 p += 4; 15572 /* CIE pointer. */ 15573 p += 4; 15574 /* Offset to .glink. */ 15575 val = (htab->glink->output_section->vma 15576 + htab->glink->output_offset 15577 + 8); 15578 val -= (htab->glink_eh_frame->output_section->vma 15579 + htab->glink_eh_frame->output_offset 15580 + (p - htab->glink_eh_frame->contents)); 15581 if (val + 0x80000000 > 0xffffffff) 15582 { 15583 info->callbacks->einfo 15584 (_("%P: %s offset too large for .eh_frame sdata4 encoding"), 15585 htab->glink->name); 15586 return FALSE; 15587 } 15588 bfd_put_32 (dynobj, val, p); 15589 p += 4; 15590 /* .glink size. */ 15591 p += 4; 15592 /* Augmentation. */ 15593 p += 1; 15594 /* Ops. */ 15595 p += 7; 15596 } 15597 15598 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 15599 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 15600 htab->glink_eh_frame, 15601 htab->glink_eh_frame->contents)) 15602 return FALSE; 15603 } 15604 15605 /* We need to handle writing out multiple GOT sections ourselves, 15606 since we didn't add them to DYNOBJ. We know dynobj is the first 15607 bfd. */ 15608 while ((dynobj = dynobj->link.next) != NULL) 15609 { 15610 asection *s; 15611 15612 if (!is_ppc64_elf (dynobj)) 15613 continue; 15614 15615 s = ppc64_elf_tdata (dynobj)->got; 15616 if (s != NULL 15617 && s->size != 0 15618 && s->output_section != bfd_abs_section_ptr 15619 && !bfd_set_section_contents (output_bfd, s->output_section, 15620 s->contents, s->output_offset, 15621 s->size)) 15622 return FALSE; 15623 s = ppc64_elf_tdata (dynobj)->relgot; 15624 if (s != NULL 15625 && s->size != 0 15626 && s->output_section != bfd_abs_section_ptr 15627 && !bfd_set_section_contents (output_bfd, s->output_section, 15628 s->contents, s->output_offset, 15629 s->size)) 15630 return FALSE; 15631 } 15632 15633 return TRUE; 15634} 15635 15636#include "elf64-target.h" 15637 15638/* FreeBSD support */ 15639 15640#undef TARGET_LITTLE_SYM 15641#undef TARGET_LITTLE_NAME 15642 15643#undef TARGET_BIG_SYM 15644#define TARGET_BIG_SYM powerpc_elf64_fbsd_vec 15645#undef TARGET_BIG_NAME 15646#define TARGET_BIG_NAME "elf64-powerpc-freebsd" 15647 15648#undef ELF_OSABI 15649#define ELF_OSABI ELFOSABI_FREEBSD 15650 15651#undef elf64_bed 15652#define elf64_bed elf64_powerpc_fbsd_bed 15653 15654#include "elf64-target.h" 15655 15656