1/* IQ2000-specific support for 32-bit ELF. 2 Copyright (C) 2003-2017 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20#include "sysdep.h" 21#include "bfd.h" 22#include "libbfd.h" 23#include "elf-bfd.h" 24#include "elf/iq2000.h" 25 26/* Forward declarations. */ 27 28static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 29 30 31static reloc_howto_type iq2000_elf_howto_table [] = 32{ 33 /* This reloc does nothing. */ 34 35 HOWTO (R_IQ2000_NONE, /* type */ 36 0, /* rightshift */ 37 3, /* size (0 = byte, 1 = short, 2 = long) */ 38 0, /* bitsize */ 39 FALSE, /* pc_relative */ 40 0, /* bitpos */ 41 complain_overflow_dont, /* complain_on_overflow */ 42 bfd_elf_generic_reloc, /* special_function */ 43 "R_IQ2000_NONE", /* name */ 44 FALSE, /* partial_inplace */ 45 0, /* src_mask */ 46 0, /* dst_mask */ 47 FALSE), /* pcrel_offset */ 48 49 /* A 16 bit absolute relocation. */ 50 HOWTO (R_IQ2000_16, /* type */ 51 0, /* rightshift */ 52 1, /* size (0 = byte, 1 = short, 2 = long) */ 53 16, /* bitsize */ 54 FALSE, /* pc_relative */ 55 0, /* bitpos */ 56 complain_overflow_bitfield, /* complain_on_overflow */ 57 bfd_elf_generic_reloc, /* special_function */ 58 "R_IQ2000_16", /* name */ 59 FALSE, /* partial_inplace */ 60 0x0000, /* src_mask */ 61 0xffff, /* dst_mask */ 62 FALSE), /* pcrel_offset */ 63 64 /* A 32 bit absolute relocation. */ 65 HOWTO (R_IQ2000_32, /* type */ 66 0, /* rightshift */ 67 2, /* size (0 = byte, 1 = short, 2 = long) */ 68 31, /* bitsize */ 69 FALSE, /* pc_relative */ 70 0, /* bitpos */ 71 complain_overflow_bitfield, /* complain_on_overflow */ 72 bfd_elf_generic_reloc, /* special_function */ 73 "R_IQ2000_32", /* name */ 74 FALSE, /* partial_inplace */ 75 0x00000000, /* src_mask */ 76 0x7fffffff, /* dst_mask */ 77 FALSE), /* pcrel_offset */ 78 79 /* 26 bit branch address. */ 80 HOWTO (R_IQ2000_26, /* type */ 81 2, /* rightshift */ 82 2, /* size (0 = byte, 1 = short, 2 = long) */ 83 26, /* bitsize */ 84 FALSE, /* pc_relative */ 85 0, /* bitpos */ 86 complain_overflow_dont, /* complain_on_overflow */ 87 /* This needs complex overflow 88 detection, because the upper four 89 bits must match the PC. */ 90 bfd_elf_generic_reloc, /* special_function */ 91 "R_IQ2000_26", /* name */ 92 FALSE, /* partial_inplace */ 93 0x00000000, /* src_mask */ 94 0x03ffffff, /* dst_mask */ 95 FALSE), /* pcrel_offset */ 96 97 /* 16 bit PC relative reference. */ 98 HOWTO (R_IQ2000_PC16, /* type */ 99 2, /* rightshift */ 100 2, /* size (0 = byte, 1 = short, 2 = long) */ 101 16, /* bitsize */ 102 TRUE, /* pc_relative */ 103 0, /* bitpos */ 104 complain_overflow_signed, /* complain_on_overflow */ 105 bfd_elf_generic_reloc, /* special_function */ 106 "R_IQ2000_PC16", /* name */ 107 FALSE, /* partial_inplace */ 108 0x0000, /* src_mask */ 109 0xffff, /* dst_mask */ 110 TRUE), /* pcrel_offset */ 111 112 /* high 16 bits of symbol value. */ 113 HOWTO (R_IQ2000_HI16, /* type */ 114 16, /* rightshift */ 115 2, /* size (0 = byte, 1 = short, 2 = long) */ 116 15, /* bitsize */ 117 FALSE, /* pc_relative */ 118 0, /* bitpos */ 119 complain_overflow_dont, /* complain_on_overflow */ 120 iq2000_elf_howto_hi16_reloc, /* special_function */ 121 "R_IQ2000_HI16", /* name */ 122 FALSE, /* partial_inplace */ 123 0x0000, /* src_mask */ 124 0x7fff, /* dst_mask */ 125 FALSE), /* pcrel_offset */ 126 127 /* Low 16 bits of symbol value. */ 128 HOWTO (R_IQ2000_LO16, /* type */ 129 0, /* rightshift */ 130 2, /* size (0 = byte, 1 = short, 2 = long) */ 131 16, /* bitsize */ 132 FALSE, /* pc_relative */ 133 0, /* bitpos */ 134 complain_overflow_dont, /* complain_on_overflow */ 135 bfd_elf_generic_reloc, /* special_function */ 136 "R_IQ2000_LO16", /* name */ 137 FALSE, /* partial_inplace */ 138 0x0000, /* src_mask */ 139 0xffff, /* dst_mask */ 140 FALSE), /* pcrel_offset */ 141 142 /* 16-bit jump offset. */ 143 HOWTO (R_IQ2000_OFFSET_16, /* type */ 144 2, /* rightshift */ 145 2, /* size (0 = byte, 1 = short, 2 = long) */ 146 16, /* bitsize */ 147 FALSE, /* pc_relative */ 148 0, /* bitpos */ 149 complain_overflow_dont, /* complain_on_overflow */ 150 bfd_elf_generic_reloc, /* special_function */ 151 "R_IQ2000_OFFSET_16", /* name */ 152 FALSE, /* partial_inplace */ 153 0x0000, /* src_mask */ 154 0xffff, /* dst_mask */ 155 FALSE), /* pcrel_offset */ 156 157 /* 21-bit jump offset. */ 158 HOWTO (R_IQ2000_OFFSET_21, /* type */ 159 2, /* rightshift */ 160 2, /* size (0 = byte, 1 = short, 2 = long) */ 161 21, /* bitsize */ 162 FALSE, /* pc_relative */ 163 0, /* bitpos */ 164 complain_overflow_dont, /* complain_on_overflow */ 165 bfd_elf_generic_reloc, /* special_function */ 166 "R_IQ2000_OFFSET_21", /* name */ 167 FALSE, /* partial_inplace */ 168 0x000000, /* src_mask */ 169 0x1fffff, /* dst_mask */ 170 FALSE), /* pcrel_offset */ 171 172 /* unsigned high 16 bits of value. */ 173 HOWTO (R_IQ2000_OFFSET_21, /* type */ 174 16, /* rightshift */ 175 2, /* size (0 = byte, 1 = short, 2 = long) */ 176 16, /* bitsize */ 177 FALSE, /* pc_relative */ 178 0, /* bitpos */ 179 complain_overflow_dont, /* complain_on_overflow */ 180 bfd_elf_generic_reloc, /* special_function */ 181 "R_IQ2000_UHI16", /* name */ 182 FALSE, /* partial_inplace */ 183 0x0000, /* src_mask */ 184 0x7fff, /* dst_mask */ 185 FALSE), /* pcrel_offset */ 186 187 /* A 32 bit absolute debug relocation. */ 188 HOWTO (R_IQ2000_32_DEBUG, /* type */ 189 0, /* rightshift */ 190 2, /* size (0 = byte, 1 = short, 2 = long) */ 191 32, /* bitsize */ 192 FALSE, /* pc_relative */ 193 0, /* bitpos */ 194 complain_overflow_bitfield, /* complain_on_overflow */ 195 bfd_elf_generic_reloc, /* special_function */ 196 "R_IQ2000_32", /* name */ 197 FALSE, /* partial_inplace */ 198 0x00000000, /* src_mask */ 199 0xffffffff, /* dst_mask */ 200 FALSE), /* pcrel_offset */ 201 202}; 203 204/* GNU extension to record C++ vtable hierarchy. */ 205static reloc_howto_type iq2000_elf_vtinherit_howto = 206 HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */ 207 0, /* rightshift */ 208 2, /* size (0 = byte, 1 = short, 2 = long) */ 209 0, /* bitsize */ 210 FALSE, /* pc_relative */ 211 0, /* bitpos */ 212 complain_overflow_dont, /* complain_on_overflow */ 213 NULL, /* special_function */ 214 "R_IQ2000_GNU_VTINHERIT", /* name */ 215 FALSE, /* partial_inplace */ 216 0, /* src_mask */ 217 0, /* dst_mask */ 218 FALSE); /* pcrel_offset */ 219 220/* GNU extension to record C++ vtable member usage. */ 221static reloc_howto_type iq2000_elf_vtentry_howto = 222 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */ 223 0, /* rightshift */ 224 2, /* size (0 = byte, 1 = short, 2 = long) */ 225 0, /* bitsize */ 226 FALSE, /* pc_relative */ 227 0, /* bitpos */ 228 complain_overflow_dont, /* complain_on_overflow */ 229 NULL, /* special_function */ 230 "R_IQ2000_GNU_VTENTRY", /* name */ 231 FALSE, /* partial_inplace */ 232 0, /* src_mask */ 233 0, /* dst_mask */ 234 FALSE); /* pcrel_offset */ 235 236 237static bfd_reloc_status_type 238iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 239 arelent *reloc_entry, 240 asymbol *symbol, 241 void * data, 242 asection *input_section, 243 bfd *output_bfd, 244 char **error_message ATTRIBUTE_UNUSED) 245{ 246 bfd_reloc_status_type ret; 247 bfd_vma relocation; 248 249 /* If we're relocating and this an external symbol, 250 we don't want to change anything. */ 251 if (output_bfd != (bfd *) NULL 252 && (symbol->flags & BSF_SECTION_SYM) == 0 253 && reloc_entry->addend == 0) 254 { 255 reloc_entry->address += input_section->output_offset; 256 return bfd_reloc_ok; 257 } 258 259 if (bfd_is_com_section (symbol->section)) 260 relocation = 0; 261 else 262 relocation = symbol->value; 263 264 relocation += symbol->section->output_section->vma; 265 relocation += symbol->section->output_offset; 266 relocation += reloc_entry->addend; 267 268 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */ 269 if (relocation & 0x8000) 270 reloc_entry->addend += 0x10000; 271 272 /* Now do the reloc in the usual way. */ 273 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 274 input_section, output_bfd, error_message); 275 276 /* Put it back the way it was. */ 277 if (relocation & 0x8000) 278 reloc_entry->addend -= 0x10000; 279 280 return ret; 281} 282 283static bfd_reloc_status_type 284iq2000_elf_relocate_hi16 (bfd *input_bfd, 285 Elf_Internal_Rela *relhi, 286 bfd_byte *contents, 287 bfd_vma value) 288{ 289 bfd_vma insn; 290 291 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 292 293 value += relhi->r_addend; 294 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */ 295 296 /* If top-bit of %lo value is on, this means that %lo will 297 sign-propagate and so we compensate by adding 1 to %hi value. */ 298 if (value & 0x8000) 299 value += 0x10000; 300 301 value >>= 16; 302 insn = ((insn & ~0xFFFF) | value); 303 304 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); 305 return bfd_reloc_ok; 306} 307 308static bfd_reloc_status_type 309iq2000_elf_relocate_offset16 (bfd *input_bfd, 310 Elf_Internal_Rela *rel, 311 bfd_byte *contents, 312 bfd_vma value, 313 bfd_vma location) 314{ 315 bfd_vma insn; 316 bfd_vma jtarget; 317 318 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 319 320 value += rel->r_addend; 321 322 if (value & 3) 323 return bfd_reloc_dangerous; 324 325 jtarget = (value & 0x3fffc) | (location & 0xf0000000L); 326 327 if (jtarget != value) 328 return bfd_reloc_overflow; 329 330 insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF); 331 332 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 333 return bfd_reloc_ok; 334} 335 336/* Map BFD reloc types to IQ2000 ELF reloc types. */ 337 338static reloc_howto_type * 339iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 340 bfd_reloc_code_real_type code) 341{ 342 /* Note that the iq2000_elf_howto_table is indxed by the R_ 343 constants. Thus, the order that the howto records appear in the 344 table *must* match the order of the relocation types defined in 345 include/elf/iq2000.h. */ 346 347 switch (code) 348 { 349 case BFD_RELOC_NONE: 350 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; 351 case BFD_RELOC_16: 352 return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; 353 case BFD_RELOC_32: 354 return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; 355 case BFD_RELOC_MIPS_JMP: 356 return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; 357 case BFD_RELOC_IQ2000_OFFSET_16: 358 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; 359 case BFD_RELOC_IQ2000_OFFSET_21: 360 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; 361 case BFD_RELOC_16_PCREL_S2: 362 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; 363 case BFD_RELOC_HI16: 364 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; 365 case BFD_RELOC_IQ2000_UHI16: 366 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; 367 case BFD_RELOC_LO16: 368 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; 369 case BFD_RELOC_VTABLE_INHERIT: 370 return &iq2000_elf_vtinherit_howto; 371 case BFD_RELOC_VTABLE_ENTRY: 372 return &iq2000_elf_vtentry_howto; 373 default: 374 /* Pacify gcc -Wall. */ 375 return NULL; 376 } 377 return NULL; 378} 379 380static reloc_howto_type * 381iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 382{ 383 unsigned int i; 384 385 for (i = 0; 386 i < (sizeof (iq2000_elf_howto_table) 387 / sizeof (iq2000_elf_howto_table[0])); 388 i++) 389 if (iq2000_elf_howto_table[i].name != NULL 390 && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0) 391 return &iq2000_elf_howto_table[i]; 392 393 if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0) 394 return &iq2000_elf_vtinherit_howto; 395 if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0) 396 return &iq2000_elf_vtentry_howto; 397 398 return NULL; 399} 400 401/* Perform a single relocation. By default we use the standard BFD 402 routines. */ 403 404static bfd_reloc_status_type 405iq2000_final_link_relocate (reloc_howto_type * howto, 406 bfd * input_bfd, 407 asection * input_section, 408 bfd_byte * contents, 409 Elf_Internal_Rela * rel, 410 bfd_vma relocation) 411{ 412 return _bfd_final_link_relocate (howto, input_bfd, input_section, 413 contents, rel->r_offset, 414 relocation, rel->r_addend); 415} 416 417/* Set the howto pointer for a IQ2000 ELF reloc. */ 418 419static void 420iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, 421 arelent * cache_ptr, 422 Elf_Internal_Rela * dst) 423{ 424 unsigned int r_type; 425 426 r_type = ELF32_R_TYPE (dst->r_info); 427 switch (r_type) 428 { 429 case R_IQ2000_GNU_VTINHERIT: 430 cache_ptr->howto = & iq2000_elf_vtinherit_howto; 431 break; 432 433 case R_IQ2000_GNU_VTENTRY: 434 cache_ptr->howto = & iq2000_elf_vtentry_howto; 435 break; 436 437 default: 438 if (r_type >= (unsigned int) R_IQ2000_max) 439 { 440 /* xgettext:c-format */ 441 _bfd_error_handler (_("%B: invalid IQ2000 reloc number: %d"), abfd, r_type); 442 r_type = 0; 443 } 444 cache_ptr->howto = & iq2000_elf_howto_table [r_type]; 445 break; 446 } 447} 448 449/* Look through the relocs for a section during the first phase. 450 Since we don't do .gots or .plts, we just need to consider the 451 virtual table relocs for gc. */ 452 453static bfd_boolean 454iq2000_elf_check_relocs (bfd *abfd, 455 struct bfd_link_info *info, 456 asection *sec, 457 const Elf_Internal_Rela *relocs) 458{ 459 Elf_Internal_Shdr *symtab_hdr; 460 struct elf_link_hash_entry **sym_hashes; 461 const Elf_Internal_Rela *rel; 462 const Elf_Internal_Rela *rel_end; 463 bfd_boolean changed = FALSE; 464 465 if (bfd_link_relocatable (info)) 466 return TRUE; 467 468 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 469 sym_hashes = elf_sym_hashes (abfd); 470 471 rel_end = relocs + sec->reloc_count; 472 for (rel = relocs; rel < rel_end; rel++) 473 { 474 struct elf_link_hash_entry *h; 475 unsigned long r_symndx; 476 477 r_symndx = ELF32_R_SYM (rel->r_info); 478 if (r_symndx < symtab_hdr->sh_info) 479 h = NULL; 480 else 481 { 482 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 483 while (h->root.type == bfd_link_hash_indirect 484 || h->root.type == bfd_link_hash_warning) 485 h = (struct elf_link_hash_entry *) h->root.u.i.link; 486 487 /* PR15323, ref flags aren't set for references in the same 488 object. */ 489 h->root.non_ir_ref = 1; 490 } 491 492 switch (ELF32_R_TYPE (rel->r_info)) 493 { 494 /* This relocation describes the C++ object vtable 495 hierarchy. Reconstruct it for later use during GC. */ 496 case R_IQ2000_GNU_VTINHERIT: 497 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 498 return FALSE; 499 break; 500 501 /* This relocation describes which C++ vtable entries 502 are actually used. Record for later use during GC. */ 503 case R_IQ2000_GNU_VTENTRY: 504 BFD_ASSERT (h != NULL); 505 if (h != NULL 506 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 507 return FALSE; 508 break; 509 510 case R_IQ2000_32: 511 /* For debug section, change to special harvard-aware relocations. */ 512 if (CONST_STRNEQ (sec->name, ".debug") 513 || CONST_STRNEQ (sec->name, ".stab") 514 || CONST_STRNEQ (sec->name, ".eh_frame")) 515 { 516 ((Elf_Internal_Rela *) rel)->r_info 517 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); 518 changed = TRUE; 519 } 520 break; 521 } 522 } 523 524 if (changed) 525 /* Note that we've changed relocs, otherwise if !info->keep_memory 526 we'll free the relocs and lose our changes. */ 527 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; 528 529 return TRUE; 530} 531 532 533/* Relocate a IQ2000 ELF section. 534 There is some attempt to make this function usable for many architectures, 535 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 536 if only to serve as a learning tool. 537 538 The RELOCATE_SECTION function is called by the new ELF backend linker 539 to handle the relocations for a section. 540 541 The relocs are always passed as Rela structures; if the section 542 actually uses Rel structures, the r_addend field will always be 543 zero. 544 545 This function is responsible for adjusting the section contents as 546 necessary, and (if using Rela relocs and generating a relocatable 547 output file) adjusting the reloc addend as necessary. 548 549 This function does not have to worry about setting the reloc 550 address or the reloc symbol index. 551 552 LOCAL_SYMS is a pointer to the swapped in local symbols. 553 554 LOCAL_SECTIONS is an array giving the section in the input file 555 corresponding to the st_shndx field of each local symbol. 556 557 The global hash table entry for the global symbols can be found 558 via elf_sym_hashes (input_bfd). 559 560 When generating relocatable output, this function must handle 561 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 562 going to be the section symbol corresponding to the output 563 section, which means that the addend must be adjusted 564 accordingly. */ 565 566static bfd_boolean 567iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, 568 struct bfd_link_info * info, 569 bfd * input_bfd, 570 asection * input_section, 571 bfd_byte * contents, 572 Elf_Internal_Rela * relocs, 573 Elf_Internal_Sym * local_syms, 574 asection ** local_sections) 575{ 576 Elf_Internal_Shdr * symtab_hdr; 577 struct elf_link_hash_entry ** sym_hashes; 578 Elf_Internal_Rela * rel; 579 Elf_Internal_Rela * relend; 580 581 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 582 sym_hashes = elf_sym_hashes (input_bfd); 583 relend = relocs + input_section->reloc_count; 584 585 for (rel = relocs; rel < relend; rel ++) 586 { 587 reloc_howto_type * howto; 588 unsigned long r_symndx; 589 Elf_Internal_Sym * sym; 590 asection * sec; 591 struct elf_link_hash_entry * h; 592 bfd_vma relocation; 593 bfd_reloc_status_type r; 594 const char * name = NULL; 595 int r_type; 596 597 r_type = ELF32_R_TYPE (rel->r_info); 598 599 if ( r_type == R_IQ2000_GNU_VTINHERIT 600 || r_type == R_IQ2000_GNU_VTENTRY) 601 continue; 602 603 r_symndx = ELF32_R_SYM (rel->r_info); 604 605 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); 606 h = NULL; 607 sym = NULL; 608 sec = NULL; 609 610 if (r_symndx < symtab_hdr->sh_info) 611 { 612 asection *osec; 613 614 sym = local_syms + r_symndx; 615 osec = sec = local_sections [r_symndx]; 616 if ((sec->flags & SEC_MERGE) 617 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 618 /* This relocation is relative to a section symbol that is 619 going to be merged. Change it so that it is relative 620 to the merged section symbol. */ 621 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec, 622 rel->r_addend); 623 624 relocation = (sec->output_section->vma 625 + sec->output_offset 626 + sym->st_value); 627 628 name = bfd_elf_string_from_elf_section 629 (input_bfd, symtab_hdr->sh_link, sym->st_name); 630 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name; 631 } 632 else 633 { 634 bfd_boolean unresolved_reloc; 635 bfd_boolean warned, ignored; 636 637 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 638 r_symndx, symtab_hdr, sym_hashes, 639 h, sec, relocation, 640 unresolved_reloc, warned, ignored); 641 642 name = h->root.root.string; 643 } 644 645 if (sec != NULL && discarded_section (sec)) 646 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 647 rel, 1, relend, howto, 0, contents); 648 649 if (bfd_link_relocatable (info)) 650 continue; 651 652 switch (r_type) 653 { 654 case R_IQ2000_HI16: 655 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); 656 break; 657 658 case R_IQ2000_OFFSET_16: 659 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation, 660 input_section->output_section->vma 661 + input_section->output_offset 662 + rel->r_offset); 663 break; 664 665 case R_IQ2000_PC16: 666 rel->r_addend -= 4; 667 /* Fall through. */ 668 669 default: 670 r = iq2000_final_link_relocate (howto, input_bfd, input_section, 671 contents, rel, relocation); 672 break; 673 } 674 675 if (r != bfd_reloc_ok) 676 { 677 const char * msg = (const char *) NULL; 678 679 switch (r) 680 { 681 case bfd_reloc_overflow: 682 (*info->callbacks->reloc_overflow) 683 (info, (h ? &h->root : NULL), name, howto->name, 684 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 685 break; 686 687 case bfd_reloc_undefined: 688 (*info->callbacks->undefined_symbol) 689 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 690 break; 691 692 case bfd_reloc_outofrange: 693 msg = _("internal error: out of range error"); 694 break; 695 696 case bfd_reloc_notsupported: 697 msg = _("internal error: unsupported relocation error"); 698 break; 699 700 case bfd_reloc_dangerous: 701 msg = _("internal error: dangerous relocation"); 702 break; 703 704 default: 705 msg = _("internal error: unknown error"); 706 break; 707 } 708 709 if (msg) 710 (*info->callbacks->warning) (info, msg, name, input_bfd, 711 input_section, rel->r_offset); 712 } 713 } 714 715 return TRUE; 716} 717 718 719/* Return the section that should be marked against GC for a given 720 relocation. */ 721 722static asection * 723iq2000_elf_gc_mark_hook (asection *sec, 724 struct bfd_link_info *info, 725 Elf_Internal_Rela *rel, 726 struct elf_link_hash_entry *h, 727 Elf_Internal_Sym *sym) 728{ 729 if (h != NULL) 730 switch (ELF32_R_TYPE (rel->r_info)) 731 { 732 case R_IQ2000_GNU_VTINHERIT: 733 case R_IQ2000_GNU_VTENTRY: 734 return NULL; 735 } 736 737 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 738} 739 740 741/* Return the MACH for an e_flags value. */ 742 743static int 744elf32_iq2000_machine (bfd *abfd) 745{ 746 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) 747 { 748 case EF_IQ2000_CPU_IQ10: 749 return bfd_mach_iq10; 750 751 case EF_IQ2000_CPU_IQ2000: 752 default: 753 return bfd_mach_iq2000; 754 } 755} 756 757 758/* Function to set the ELF flag bits. */ 759 760static bfd_boolean 761iq2000_elf_set_private_flags (bfd *abfd, flagword flags) 762{ 763 elf_elfheader (abfd)->e_flags = flags; 764 elf_flags_init (abfd) = TRUE; 765 return TRUE; 766} 767 768/* Merge backend specific data from an object 769 file to the output object file when linking. */ 770 771static bfd_boolean 772iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 773{ 774 bfd *obfd = info->output_bfd; 775 flagword old_flags, old_partial; 776 flagword new_flags, new_partial; 777 bfd_boolean error = FALSE; 778 char new_opt[80]; 779 char old_opt[80]; 780 781 new_opt[0] = old_opt[0] = '\0'; 782 new_flags = elf_elfheader (ibfd)->e_flags; 783 old_flags = elf_elfheader (obfd)->e_flags; 784 785 if (!elf_flags_init (obfd)) 786 { 787 /* First call, no flags set. */ 788 elf_flags_init (obfd) = TRUE; 789 elf_elfheader (obfd)->e_flags = new_flags; 790 } 791 792 else if (new_flags != old_flags) 793 { 794 /* Warn if different cpu is used, but allow a 795 specific cpu to override the generic cpu. */ 796 new_partial = (new_flags & EF_IQ2000_CPU_MASK); 797 old_partial = (old_flags & EF_IQ2000_CPU_MASK); 798 799 if (new_partial != old_partial) 800 { 801 switch (new_partial) 802 { 803 case EF_IQ2000_CPU_IQ10: 804 strcat (new_opt, " -m10"); 805 break; 806 807 default: 808 case EF_IQ2000_CPU_IQ2000: 809 strcat (new_opt, " -m2000"); 810 break; 811 } 812 813 switch (old_partial) 814 { 815 case EF_IQ2000_CPU_IQ10: 816 strcat (old_opt, " -m10"); 817 break; 818 819 default: 820 case EF_IQ2000_CPU_IQ2000: 821 strcat (old_opt, " -m2000"); 822 break; 823 } 824 } 825 826 /* Print out any mismatches from above. */ 827 if (new_opt[0]) 828 { 829 error = TRUE; 830 _bfd_error_handler 831 /* xgettext:c-format */ 832 (_("%s: compiled with %s and linked with modules compiled with %s"), 833 bfd_get_filename (ibfd), new_opt, old_opt); 834 } 835 836 new_flags &= ~ EF_IQ2000_ALL_FLAGS; 837 old_flags &= ~ EF_IQ2000_ALL_FLAGS; 838 839 /* Warn about any other mismatches. */ 840 if (new_flags != old_flags) 841 { 842 error = TRUE; 843 844 _bfd_error_handler 845 /* xgettext:c-format */ 846 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), 847 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); 848 } 849 } 850 851 if (error) 852 bfd_set_error (bfd_error_bad_value); 853 854 return !error; 855} 856 857 858static bfd_boolean 859iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr) 860{ 861 FILE *file = (FILE *) ptr; 862 flagword flags; 863 864 BFD_ASSERT (abfd != NULL && ptr != NULL); 865 866 /* Print normal ELF private data. */ 867 _bfd_elf_print_private_bfd_data (abfd, ptr); 868 869 flags = elf_elfheader (abfd)->e_flags; 870 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); 871 872 switch (flags & EF_IQ2000_CPU_MASK) 873 { 874 case EF_IQ2000_CPU_IQ10: 875 fprintf (file, " -m10"); 876 break; 877 case EF_IQ2000_CPU_IQ2000: 878 fprintf (file, " -m2000"); 879 break; 880 default: 881 break; 882 } 883 884 fputc ('\n', file); 885 return TRUE; 886} 887 888static 889bfd_boolean 890iq2000_elf_object_p (bfd *abfd) 891{ 892 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, 893 elf32_iq2000_machine (abfd)); 894 return TRUE; 895} 896 897 898#define ELF_ARCH bfd_arch_iq2000 899#define ELF_MACHINE_CODE EM_IQ2000 900#define ELF_MAXPAGESIZE 0x1000 901 902#define TARGET_BIG_SYM iq2000_elf32_vec 903#define TARGET_BIG_NAME "elf32-iq2000" 904 905#define elf_info_to_howto_rel NULL 906#define elf_info_to_howto iq2000_info_to_howto_rela 907#define elf_backend_relocate_section iq2000_elf_relocate_section 908#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook 909#define elf_backend_check_relocs iq2000_elf_check_relocs 910#define elf_backend_object_p iq2000_elf_object_p 911#define elf_backend_rela_normal 1 912 913#define elf_backend_can_gc_sections 1 914 915#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup 916#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup 917#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags 918#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data 919#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data 920 921#include "elf32-target.h" 922