1/* BFD back-end for AMD 64 COFF files. 2 Copyright 2006, 2007 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, 19 MA 02110-1301, USA. 20 21 Written by Kai Tietz, OneVision Software GmbH&CoKg. */ 22 23#ifndef COFF_WITH_pex64 24#define COFF_WITH_pex64 25#endif 26 27#include "sysdep.h" 28#include "bfd.h" 29#include "libbfd.h" 30#include "coff/x86_64.h" 31#include "coff/internal.h" 32#include "coff/pe.h" 33#include "libcoff.h" 34#include "libiberty.h" 35 36#define BADMAG(x) AMD64BADMAG(x) 37 38#ifdef COFF_WITH_pex64 39# undef AOUTSZ 40# define AOUTSZ PEPAOUTSZ 41# define PEAOUTHDR PEPAOUTHDR 42#endif 43 44#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) 45 46/* The page size is a guess based on ELF. */ 47 48#define COFF_PAGE_SIZE 0x1000 49 50/* For some reason when using AMD COFF the value stored in the .text 51 section for a reference to a common symbol is the value itself plus 52 any desired offset. Ian Taylor, Cygnus Support. */ 53 54/* If we are producing relocatable output, we need to do some 55 adjustments to the object file that are not done by the 56 bfd_perform_relocation function. This function is called by every 57 reloc type to make any required adjustments. */ 58 59static bfd_reloc_status_type 60coff_amd64_reloc (bfd *abfd, 61 arelent *reloc_entry, 62 asymbol *symbol, 63 void * data, 64 asection *input_section ATTRIBUTE_UNUSED, 65 bfd *output_bfd, 66 char **error_message ATTRIBUTE_UNUSED) 67{ 68 symvalue diff; 69 70#if !defined(COFF_WITH_PE) 71 if (output_bfd == NULL) 72 return bfd_reloc_continue; 73#endif 74 75 if (bfd_is_com_section (symbol->section)) 76 { 77#if !defined(COFF_WITH_PE) 78 /* We are relocating a common symbol. The current value in the 79 object file is ORIG + OFFSET, where ORIG is the value of the 80 common symbol as seen by the object file when it was compiled 81 (this may be zero if the symbol was undefined) and OFFSET is 82 the offset into the common symbol (normally zero, but may be 83 non-zero when referring to a field in a common structure). 84 ORIG is the negative of reloc_entry->addend, which is set by 85 the CALC_ADDEND macro below. We want to replace the value in 86 the object file with NEW + OFFSET, where NEW is the value of 87 the common symbol which we are going to put in the final 88 object file. NEW is symbol->value. */ 89 diff = symbol->value + reloc_entry->addend; 90#else 91 /* In PE mode, we do not offset the common symbol. */ 92 diff = reloc_entry->addend; 93#endif 94 } 95 else 96 { 97 /* For some reason bfd_perform_relocation always effectively 98 ignores the addend for a COFF target when producing 99 relocatable output. This seems to be always wrong for 386 100 COFF, so we handle the addend here instead. */ 101#if defined(COFF_WITH_PE) 102 if (output_bfd == NULL) 103 { 104 reloc_howto_type *howto = reloc_entry->howto; 105 106 /* Although PC relative relocations are very similar between 107 PE and non-PE formats, but they are off by 1 << howto->size 108 bytes. For the external relocation, PE is very different 109 from others. See md_apply_fix3 () in gas/config/tc-amd64.c. 110 When we link PE and non-PE object files together to 111 generate a non-PE executable, we have to compensate it 112 here. */ 113 if(howto->pc_relative && howto->pcrel_offset) 114 diff = -(1 << howto->size); 115 else if(symbol->flags & BSF_WEAK) 116 diff = reloc_entry->addend - symbol->value; 117 else 118 diff = -reloc_entry->addend; 119 } 120 else 121#endif 122 diff = reloc_entry->addend; 123 } 124 125#if defined(COFF_WITH_PE) 126 /* FIXME: How should this case be handled? */ 127 if (reloc_entry->howto->type == R_AMD64_IMAGEBASE 128 && output_bfd != NULL 129 && bfd_get_flavour (output_bfd) == bfd_target_coff_flavour) 130 diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; 131#endif 132 133#define DOIT(x) \ 134 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) 135 136 if (diff != 0) 137 { 138 reloc_howto_type *howto = reloc_entry->howto; 139 unsigned char *addr = (unsigned char *) data + reloc_entry->address; 140 141 switch (howto->size) 142 { 143 case 0: 144 { 145 char x = bfd_get_8 (abfd, addr); 146 DOIT (x); 147 bfd_put_8 (abfd, x, addr); 148 } 149 break; 150 151 case 1: 152 { 153 short x = bfd_get_16 (abfd, addr); 154 DOIT (x); 155 bfd_put_16 (abfd, (bfd_vma) x, addr); 156 } 157 break; 158 159 case 2: 160 { 161 long x = bfd_get_32 (abfd, addr); 162 DOIT (x); 163 bfd_put_32 (abfd, (bfd_vma) x, addr); 164 } 165 break; 166 case 4: 167 { 168 long long x = bfd_get_64 (abfd, addr); 169 DOIT (x); 170 bfd_put_64 (abfd, (bfd_vma) x, addr); 171 } 172 break; 173 174 default: 175 abort (); 176 } 177 } 178 179 /* Now let bfd_perform_relocation finish everything up. */ 180 return bfd_reloc_continue; 181} 182 183#if defined(COFF_WITH_PE) 184/* Return TRUE if this relocation should appear in the output .reloc 185 section. */ 186 187static bfd_boolean 188in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto) 189{ 190 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE; 191} 192#endif /* COFF_WITH_PE */ 193 194#ifndef PCRELOFFSET 195#define PCRELOFFSET TRUE 196#endif 197 198static reloc_howto_type howto_table[] = 199{ 200 EMPTY_HOWTO (0), 201 HOWTO (R_AMD64_DIR64, /* type 1*/ 202 0, /* rightshift */ 203 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */ 204 64, /* bitsize */ 205 FALSE, /* pc_relative */ 206 0, /* bitpos */ 207 complain_overflow_bitfield, /* complain_on_overflow */ 208 coff_amd64_reloc, /* special_function */ 209 "R_X86_64_64", /* name */ 210 TRUE, /* partial_inplace */ 211 0xffffffffffffffffll, /* src_mask */ 212 0xffffffffffffffffll, /* dst_mask */ 213 TRUE), /* pcrel_offset */ 214 HOWTO (R_AMD64_DIR32, /* type 2 */ 215 0, /* rightshift */ 216 2, /* size (0 = byte, 1 = short, 2 = long) */ 217 32, /* bitsize */ 218 FALSE, /* pc_relative */ 219 0, /* bitpos */ 220 complain_overflow_bitfield, /* complain_on_overflow */ 221 coff_amd64_reloc, /* special_function */ 222 "R_X86_64_32", /* name */ 223 TRUE, /* partial_inplace */ 224 0xffffffff, /* src_mask */ 225 0xffffffff, /* dst_mask */ 226 TRUE), /* pcrel_offset */ 227 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */ 228 HOWTO (R_AMD64_IMAGEBASE, /* type */ 229 0, /* rightshift */ 230 2, /* size (0 = byte, 1 = short, 2 = long) */ 231 32, /* bitsize */ 232 FALSE, /* pc_relative */ 233 0, /* bitpos */ 234 complain_overflow_bitfield, /* complain_on_overflow */ 235 coff_amd64_reloc, /* special_function */ 236 "rva32", /* name */ 237 TRUE, /* partial_inplace */ 238 0xffffffff, /* src_mask */ 239 0xffffffff, /* dst_mask */ 240 FALSE), /* pcrel_offset */ 241 /* 32-bit longword PC relative relocation (4). */ 242 HOWTO (R_AMD64_PCRLONG, /* type 4 */ 243 0, /* rightshift */ 244 2, /* size (0 = byte, 1 = short, 2 = long) */ 245 32, /* bitsize */ 246 TRUE, /* pc_relative */ 247 0, /* bitpos */ 248 complain_overflow_signed, /* complain_on_overflow */ 249 coff_amd64_reloc, /* special_function */ 250 "R_X86_64_PC32", /* name */ 251 TRUE, /* partial_inplace */ 252 0xffffffff, /* src_mask */ 253 0xffffffff, /* dst_mask */ 254 PCRELOFFSET), /* pcrel_offset */ 255 256 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */ 257 0, /* rightshift */ 258 2, /* size (0 = byte, 1 = short, 2 = long) */ 259 32, /* bitsize */ 260 TRUE, /* pc_relative */ 261 0, /* bitpos */ 262 complain_overflow_signed, /* complain_on_overflow */ 263 coff_amd64_reloc, /* special_function */ 264 "DISP32+1", /* name */ 265 TRUE, /* partial_inplace */ 266 0xffffffff, /* src_mask */ 267 0xffffffff, /* dst_mask */ 268 PCRELOFFSET), /* pcrel_offset */ 269 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */ 270 0, /* rightshift */ 271 2, /* size (0 = byte, 1 = short, 2 = long) */ 272 32, /* bitsize */ 273 TRUE, /* pc_relative */ 274 0, /* bitpos */ 275 complain_overflow_signed, /* complain_on_overflow */ 276 coff_amd64_reloc, /* special_function */ 277 "DISP32+2", /* name */ 278 TRUE, /* partial_inplace */ 279 0xffffffff, /* src_mask */ 280 0xffffffff, /* dst_mask */ 281 PCRELOFFSET), /* pcrel_offset */ 282 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */ 283 0, /* rightshift */ 284 2, /* size (0 = byte, 1 = short, 2 = long) */ 285 32, /* bitsize */ 286 TRUE, /* pc_relative */ 287 0, /* bitpos */ 288 complain_overflow_signed, /* complain_on_overflow */ 289 coff_amd64_reloc, /* special_function */ 290 "DISP32+3", /* name */ 291 TRUE, /* partial_inplace */ 292 0xffffffff, /* src_mask */ 293 0xffffffff, /* dst_mask */ 294 PCRELOFFSET), /* pcrel_offset */ 295 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */ 296 0, /* rightshift */ 297 2, /* size (0 = byte, 1 = short, 2 = long) */ 298 32, /* bitsize */ 299 TRUE, /* pc_relative */ 300 0, /* bitpos */ 301 complain_overflow_signed, /* complain_on_overflow */ 302 coff_amd64_reloc, /* special_function */ 303 "DISP32+4", /* name */ 304 TRUE, /* partial_inplace */ 305 0xffffffff, /* src_mask */ 306 0xffffffff, /* dst_mask */ 307 PCRELOFFSET), /* pcrel_offset */ 308 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */ 309 0, /* rightshift */ 310 2, /* size (0 = byte, 1 = short, 2 = long) */ 311 32, /* bitsize */ 312 TRUE, /* pc_relative */ 313 0, /* bitpos */ 314 complain_overflow_signed, /* complain_on_overflow */ 315 coff_amd64_reloc, /* special_function */ 316 "DISP32+5", /* name */ 317 TRUE, /* partial_inplace */ 318 0xffffffff, /* src_mask */ 319 0xffffffff, /* dst_mask */ 320 PCRELOFFSET), /* pcrel_offset */ 321 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */ 322#if defined(COFF_WITH_PE) 323 /* 32-bit longword section relative relocation (11). */ 324 HOWTO (R_AMD64_SECREL, /* type */ 325 0, /* rightshift */ 326 2, /* size (0 = byte, 1 = short, 2 = long) */ 327 32, /* bitsize */ 328 FALSE, /* pc_relative */ 329 0, /* bitpos */ 330 complain_overflow_bitfield, /* complain_on_overflow */ 331 coff_amd64_reloc, /* special_function */ 332 "secrel32", /* name */ 333 TRUE, /* partial_inplace */ 334 0xffffffff, /* src_mask */ 335 0xffffffff, /* dst_mask */ 336 TRUE), /* pcrel_offset */ 337#else 338 EMPTY_HOWTO (11), 339#endif 340 EMPTY_HOWTO (12), 341 EMPTY_HOWTO (13), 342#ifndef DONT_EXTEND_AMD64 343 HOWTO (R_AMD64_PCRQUAD, 344 0, /* rightshift */ 345 4, /* size (0 = byte, 1 = short, 2 = long) */ 346 64, /* bitsize */ 347 TRUE, /* pc_relative */ 348 0, /* bitpos */ 349 complain_overflow_signed, /* complain_on_overflow */ 350 coff_amd64_reloc, /* special_function */ 351 "R_X86_64_PC64", /* name */ 352 TRUE, /* partial_inplace */ 353 0xffffffffffffffffll, /* src_mask */ 354 0xffffffffffffffffll, /* dst_mask */ 355 PCRELOFFSET), /* pcrel_offset */ 356#else 357 EMPTY_HOWTO (14), 358#endif 359 /* Byte relocation (15). */ 360 HOWTO (R_RELBYTE, /* type */ 361 0, /* rightshift */ 362 0, /* size (0 = byte, 1 = short, 2 = long) */ 363 8, /* bitsize */ 364 FALSE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_bitfield, /* complain_on_overflow */ 367 coff_amd64_reloc, /* special_function */ 368 "R_X86_64_8", /* name */ 369 TRUE, /* partial_inplace */ 370 0x000000ff, /* src_mask */ 371 0x000000ff, /* dst_mask */ 372 PCRELOFFSET), /* pcrel_offset */ 373 /* 16-bit word relocation (16). */ 374 HOWTO (R_RELWORD, /* type */ 375 0, /* rightshift */ 376 1, /* size (0 = byte, 1 = short, 2 = long) */ 377 16, /* bitsize */ 378 FALSE, /* pc_relative */ 379 0, /* bitpos */ 380 complain_overflow_bitfield, /* complain_on_overflow */ 381 coff_amd64_reloc, /* special_function */ 382 "R_X86_64_16", /* name */ 383 TRUE, /* partial_inplace */ 384 0x0000ffff, /* src_mask */ 385 0x0000ffff, /* dst_mask */ 386 PCRELOFFSET), /* pcrel_offset */ 387 /* 32-bit longword relocation (17). */ 388 HOWTO (R_RELLONG, /* type */ 389 0, /* rightshift */ 390 2, /* size (0 = byte, 1 = short, 2 = long) */ 391 32, /* bitsize */ 392 FALSE, /* pc_relative */ 393 0, /* bitpos */ 394 complain_overflow_bitfield, /* complain_on_overflow */ 395 coff_amd64_reloc, /* special_function */ 396 "R_X86_64_32S", /* name */ 397 TRUE, /* partial_inplace */ 398 0xffffffff, /* src_mask */ 399 0xffffffff, /* dst_mask */ 400 PCRELOFFSET), /* pcrel_offset */ 401 /* Byte PC relative relocation (18). */ 402 HOWTO (R_PCRBYTE, /* type */ 403 0, /* rightshift */ 404 0, /* size (0 = byte, 1 = short, 2 = long) */ 405 8, /* bitsize */ 406 TRUE, /* pc_relative */ 407 0, /* bitpos */ 408 complain_overflow_signed, /* complain_on_overflow */ 409 coff_amd64_reloc, /* special_function */ 410 "R_X86_64_PC8", /* name */ 411 TRUE, /* partial_inplace */ 412 0x000000ff, /* src_mask */ 413 0x000000ff, /* dst_mask */ 414 PCRELOFFSET), /* pcrel_offset */ 415 /* 16-bit word PC relative relocation (19). */ 416 HOWTO (R_PCRWORD, /* type */ 417 0, /* rightshift */ 418 1, /* size (0 = byte, 1 = short, 2 = long) */ 419 16, /* bitsize */ 420 TRUE, /* pc_relative */ 421 0, /* bitpos */ 422 complain_overflow_signed, /* complain_on_overflow */ 423 coff_amd64_reloc, /* special_function */ 424 "R_X86_64_PC16", /* name */ 425 TRUE, /* partial_inplace */ 426 0x0000ffff, /* src_mask */ 427 0x0000ffff, /* dst_mask */ 428 PCRELOFFSET), /* pcrel_offset */ 429 /* 32-bit longword PC relative relocation (20). */ 430 HOWTO (R_PCRLONG, /* type */ 431 0, /* rightshift */ 432 2, /* size (0 = byte, 1 = short, 2 = long) */ 433 32, /* bitsize */ 434 TRUE, /* pc_relative */ 435 0, /* bitpos */ 436 complain_overflow_signed, /* complain_on_overflow */ 437 coff_amd64_reloc, /* special_function */ 438 "R_X86_64_PC32", /* name */ 439 TRUE, /* partial_inplace */ 440 0xffffffff, /* src_mask */ 441 0xffffffff, /* dst_mask */ 442 PCRELOFFSET) /* pcrel_offset */ 443}; 444 445/* Turn a howto into a reloc nunmber */ 446 447#define SELECT_RELOC(x,howto) { x.r_type = howto->type; } 448#define I386 1 /* Customize coffcode.h */ 449#define AMD64 1 450 451#define RTYPE2HOWTO(cache_ptr, dst) \ 452 ((cache_ptr)->howto = \ 453 ((dst)->r_type < ARRAY_SIZE (howto_table)) \ 454 ? howto_table + (dst)->r_type \ 455 : NULL) 456 457/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared 458 library. On some other COFF targets STYP_BSS is normally 459 STYP_NOLOAD. */ 460#define BSS_NOLOAD_IS_SHARED_LIBRARY 461 462/* Compute the addend of a reloc. If the reloc is to a common symbol, 463 the object file contains the value of the common symbol. By the 464 time this is called, the linker may be using a different symbol 465 from a different object file with a different value. Therefore, we 466 hack wildly to locate the original symbol from this file so that we 467 can make the correct adjustment. This macro sets coffsym to the 468 symbol from the original file, and uses it to set the addend value 469 correctly. If this is not a common symbol, the usual addend 470 calculation is done, except that an additional tweak is needed for 471 PC relative relocs. 472 FIXME: This macro refers to symbols and asect; these are from the 473 calling function, not the macro arguments. */ 474 475#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ 476 { \ 477 coff_symbol_type *coffsym = NULL; \ 478 \ 479 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ 480 coffsym = (obj_symbols (abfd) \ 481 + (cache_ptr->sym_ptr_ptr - symbols)); \ 482 else if (ptr) \ 483 coffsym = coff_symbol_from (abfd, ptr); \ 484 \ 485 if (coffsym != NULL \ 486 && coffsym->native->u.syment.n_scnum == 0) \ 487 cache_ptr->addend = - coffsym->native->u.syment.n_value; \ 488 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ 489 && ptr->section != NULL) \ 490 cache_ptr->addend = - (ptr->section->vma + ptr->value); \ 491 else \ 492 cache_ptr->addend = 0; \ 493 if (ptr && howto_table[reloc.r_type].pc_relative) \ 494 cache_ptr->addend += asect->vma; \ 495 } 496 497/* We use the special COFF backend linker. For normal AMD64 COFF, we 498 can use the generic relocate_section routine. For PE, we need our 499 own routine. */ 500 501#if !defined(COFF_WITH_PE) 502 503#define coff_relocate_section _bfd_coff_generic_relocate_section 504 505#else /* COFF_WITH_PE */ 506 507/* The PE relocate section routine. The only difference between this 508 and the regular routine is that we don't want to do anything for a 509 relocatable link. */ 510 511static bfd_boolean 512coff_pe_amd64_relocate_section (bfd *output_bfd, 513 struct bfd_link_info *info, 514 bfd *input_bfd, 515 asection *input_section, 516 bfd_byte *contents, 517 struct internal_reloc *relocs, 518 struct internal_syment *syms, 519 asection **sections) 520{ 521 if (info->relocatable) 522 return TRUE; 523 524 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections); 525} 526 527#define coff_relocate_section coff_pe_amd64_relocate_section 528 529#endif /* COFF_WITH_PE */ 530 531/* Convert an rtype to howto for the COFF backend linker. */ 532 533static reloc_howto_type * 534coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 535 asection *sec, 536 struct internal_reloc *rel, 537 struct coff_link_hash_entry *h, 538 struct internal_syment *sym, 539 bfd_vma *addendp) 540{ 541 reloc_howto_type *howto; 542 543 if (rel->r_type > ARRAY_SIZE (howto_table)) 544 { 545 bfd_set_error (bfd_error_bad_value); 546 return NULL; 547 } 548 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5) 549 { 550 rel->r_vaddr += (bfd_vma)(rel->r_type-R_AMD64_PCRLONG); 551 rel->r_type = R_AMD64_PCRLONG; 552 } 553 howto = howto_table + rel->r_type; 554 555#if defined(COFF_WITH_PE) 556 /* Cancel out code in _bfd_coff_generic_relocate_section. */ 557 *addendp = 0; 558#endif 559 560 if (howto->pc_relative) 561 *addendp += sec->vma; 562 563 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) 564 { 565 /* This is a common symbol. The section contents include the 566 size (sym->n_value) as an addend. The relocate_section 567 function will be adding in the final value of the symbol. We 568 need to subtract out the current size in order to get the 569 correct result. */ 570 BFD_ASSERT (h != NULL); 571 572#if !defined(COFF_WITH_PE) 573 /* I think we *do* want to bypass this. If we don't, I have 574 seen some data parameters get the wrong relocation address. 575 If I link two versions with and without this section bypassed 576 and then do a binary comparison, the addresses which are 577 different can be looked up in the map. The case in which 578 this section has been bypassed has addresses which correspond 579 to values I can find in the map. */ 580 *addendp -= sym->n_value; 581#endif 582 } 583 584#if !defined(COFF_WITH_PE) 585 /* If the output symbol is common (in which case this must be a 586 relocatable link), we need to add in the final size of the 587 common symbol. */ 588 if (h != NULL && h->root.type == bfd_link_hash_common) 589 *addendp += h->root.u.c.size; 590#endif 591 592#if defined(COFF_WITH_PE) 593 if (howto->pc_relative) 594 { 595 *addendp -= 4; 596 597 /* If the symbol is defined, then the generic code is going to 598 add back the symbol value in order to cancel out an 599 adjustment it made to the addend. However, we set the addend 600 to 0 at the start of this function. We need to adjust here, 601 to avoid the adjustment the generic code will make. FIXME: 602 This is getting a bit hackish. */ 603 if (sym != NULL && sym->n_scnum != 0) 604 *addendp -= sym->n_value; 605 } 606 607 if (rel->r_type == R_AMD64_IMAGEBASE 608 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour)) 609 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; 610 611 if (rel->r_type == R_AMD64_SECREL) 612 { 613 bfd_vma osect_vma; 614 615 if (h && (h->type == bfd_link_hash_defined || h->type == bfd_link_hash_defweak)) 616 osect_vma = h->root.u.def.section->output_section->vma; 617 else 618 { 619 asection *sec; 620 int i; 621 622 /* Sigh, the only way to get the section to offset against 623 is to find it the hard way. */ 624 for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++) 625 sec = sec->next; 626 627 osect_vma = sec->output_section->vma; 628 } 629 630 *addendp -= osect_vma; 631 } 632#endif 633 634 return howto; 635} 636 637#define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup 638#define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup 639 640static reloc_howto_type * 641coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 642{ 643 switch (code) 644 { 645 case BFD_RELOC_RVA: 646 return howto_table + R_AMD64_IMAGEBASE; 647 case BFD_RELOC_32: 648 return howto_table + R_AMD64_DIR32; 649 case BFD_RELOC_64: 650 return howto_table + R_AMD64_DIR64; 651 case BFD_RELOC_64_PCREL: 652#ifndef DONT_EXTEND_AMD64 653 return howto_table + R_AMD64_PCRQUAD; 654#else 655 /* Fall through. */ 656#endif 657 case BFD_RELOC_32_PCREL: 658 return howto_table + R_AMD64_PCRLONG; 659 case BFD_RELOC_X86_64_32S: 660 return howto_table + R_RELLONG; 661 case BFD_RELOC_16: 662 return howto_table + R_RELWORD; 663 case BFD_RELOC_16_PCREL: 664 return howto_table + R_PCRWORD; 665 case BFD_RELOC_8: 666 return howto_table + R_RELBYTE; 667 case BFD_RELOC_8_PCREL: 668 return howto_table + R_PCRBYTE; 669#if defined(COFF_WITH_PE) 670 case BFD_RELOC_32_SECREL: 671 return howto_table + R_AMD64_SECREL; 672#endif 673 default: 674 BFD_FAIL (); 675 return 0; 676 } 677} 678 679static reloc_howto_type * 680coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 681 const char *r_name) 682{ 683 unsigned int i; 684 685 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) 686 if (howto_table[i].name != NULL 687 && strcasecmp (howto_table[i].name, r_name) == 0) 688 return &howto_table[i]; 689 690 return NULL; 691} 692 693#define coff_rtype_to_howto coff_amd64_rtype_to_howto 694 695#ifdef TARGET_UNDERSCORE 696 697/* If amd64 gcc uses underscores for symbol names, then it does not use 698 a leading dot for local labels, so if TARGET_UNDERSCORE is defined 699 we treat all symbols starting with L as local. */ 700 701static bfd_boolean 702coff_amd64_is_local_label_name (bfd *abfd, const char *name) 703{ 704 if (name[0] == 'L') 705 return TRUE; 706 707 return _bfd_coff_is_local_label_name (abfd, name); 708} 709 710#define coff_bfd_is_local_label_name coff_amd64_is_local_label_name 711 712#endif /* TARGET_UNDERSCORE */ 713 714#include "coffcode.h" 715 716#ifdef PE 717#define amd64coff_object_p pe_bfd_object_p 718#else 719#define amd64coff_object_p coff_object_p 720#endif 721 722const bfd_target 723#ifdef TARGET_SYM 724 TARGET_SYM = 725#else 726 x86_64coff_vec = 727#endif 728{ 729#ifdef TARGET_NAME 730 TARGET_NAME, 731#else 732 "coff-x86-64", /* Name. */ 733#endif 734 bfd_target_coff_flavour, 735 BFD_ENDIAN_LITTLE, /* Data byte order is little. */ 736 BFD_ENDIAN_LITTLE, /* Header byte order is little. */ 737 738 (HAS_RELOC | EXEC_P | /* Object flags. */ 739 HAS_LINENO | HAS_DEBUG | 740 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 741 742 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 743#if defined(COFF_WITH_PE) 744 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY 745#endif 746 | SEC_CODE | SEC_DATA), 747 748#ifdef TARGET_UNDERSCORE 749 TARGET_UNDERSCORE, /* Leading underscore. */ 750#else 751 0, /* Leading underscore. */ 752#endif 753 '/', /* Ar_pad_char. */ 754 15, /* Ar_max_namelen. */ 755 756 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 757 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 758 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ 759 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 760 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 761 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */ 762 763 /* Note that we allow an object file to be treated as a core file as well. */ 764 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */ 765 bfd_generic_archive_p, amd64coff_object_p }, 766 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ 767 bfd_false }, 768 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */ 769 _bfd_write_archive_contents, bfd_false }, 770 771 BFD_JUMP_TABLE_GENERIC (coff), 772 BFD_JUMP_TABLE_COPY (coff), 773 BFD_JUMP_TABLE_CORE (_bfd_nocore), 774 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 775 BFD_JUMP_TABLE_SYMBOLS (coff), 776 BFD_JUMP_TABLE_RELOCS (coff), 777 BFD_JUMP_TABLE_WRITE (coff), 778 BFD_JUMP_TABLE_LINK (coff), 779 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 780 781 NULL, 782 783 COFF_SWAP_TABLE 784}; 785