1 /* BFD back-end for AMD 64 COFF files. 2 Copyright (C) 2006-2016 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 /* Note we have to make sure not to include headers twice. 28 Not all headers are wrapped in #ifdef guards, so we define 29 PEI_HEADERS to prevent double including here. */ 30 #ifndef PEI_HEADERS 31 #include "sysdep.h" 32 #include "bfd.h" 33 #include "libbfd.h" 34 #include "coff/x86_64.h" 35 #include "coff/internal.h" 36 #include "coff/pe.h" 37 #include "libcoff.h" 38 #include "libiberty.h" 39 #endif 40 41 #define BADMAG(x) AMD64BADMAG(x) 42 43 #ifdef COFF_WITH_pex64 44 # undef AOUTSZ 45 # define AOUTSZ PEPAOUTSZ 46 # define PEAOUTHDR PEPAOUTHDR 47 #endif 48 49 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) 50 51 /* The page size is a guess based on ELF. */ 52 53 #define COFF_PAGE_SIZE 0x1000 54 55 /* For some reason when using AMD COFF the value stored in the .text 56 section for a reference to a common symbol is the value itself plus 57 any desired offset. Ian Taylor, Cygnus Support. */ 58 59 /* If we are producing relocatable output, we need to do some 60 adjustments to the object file that are not done by the 61 bfd_perform_relocation function. This function is called by every 62 reloc type to make any required adjustments. */ 63 64 static bfd_reloc_status_type 65 coff_amd64_reloc (bfd *abfd, 66 arelent *reloc_entry, 67 asymbol *symbol, 68 void * data, 69 asection *input_section ATTRIBUTE_UNUSED, 70 bfd *output_bfd, 71 char **error_message ATTRIBUTE_UNUSED) 72 { 73 symvalue diff; 74 75 #if !defined(COFF_WITH_PE) 76 if (output_bfd == NULL) 77 return bfd_reloc_continue; 78 #endif 79 80 if (bfd_is_com_section (symbol->section)) 81 { 82 #if !defined(COFF_WITH_PE) 83 /* We are relocating a common symbol. The current value in the 84 object file is ORIG + OFFSET, where ORIG is the value of the 85 common symbol as seen by the object file when it was compiled 86 (this may be zero if the symbol was undefined) and OFFSET is 87 the offset into the common symbol (normally zero, but may be 88 non-zero when referring to a field in a common structure). 89 ORIG is the negative of reloc_entry->addend, which is set by 90 the CALC_ADDEND macro below. We want to replace the value in 91 the object file with NEW + OFFSET, where NEW is the value of 92 the common symbol which we are going to put in the final 93 object file. NEW is symbol->value. */ 94 diff = symbol->value + reloc_entry->addend; 95 #else 96 /* In PE mode, we do not offset the common symbol. */ 97 diff = reloc_entry->addend; 98 #endif 99 } 100 else 101 { 102 /* For some reason bfd_perform_relocation always effectively 103 ignores the addend for a COFF target when producing 104 relocatable output. This seems to be always wrong for 386 105 COFF, so we handle the addend here instead. */ 106 #if defined(COFF_WITH_PE) 107 if (output_bfd == NULL) 108 { 109 reloc_howto_type *howto = reloc_entry->howto; 110 111 /* Although PC relative relocations are very similar between 112 PE and non-PE formats, but they are off by 1 << howto->size 113 bytes. For the external relocation, PE is very different 114 from others. See md_apply_fix3 () in gas/config/tc-amd64.c. 115 When we link PE and non-PE object files together to 116 generate a non-PE executable, we have to compensate it 117 here. */ 118 if(howto->pc_relative && howto->pcrel_offset) 119 diff = -(1 << howto->size); 120 else if(symbol->flags & BSF_WEAK) 121 diff = reloc_entry->addend - symbol->value; 122 else 123 diff = -reloc_entry->addend; 124 } 125 else 126 #endif 127 diff = reloc_entry->addend; 128 } 129 130 #if defined(COFF_WITH_PE) 131 /* FIXME: How should this case be handled? */ 132 if (reloc_entry->howto->type == R_AMD64_IMAGEBASE 133 && output_bfd != NULL 134 && bfd_get_flavour (output_bfd) == bfd_target_coff_flavour) 135 diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; 136 #endif 137 138 #define DOIT(x) \ 139 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) 140 141 if (diff != 0) 142 { 143 reloc_howto_type *howto = reloc_entry->howto; 144 unsigned char *addr = (unsigned char *) data + reloc_entry->address; 145 146 /* FIXME: We do not have an end address for data, so we cannot 147 accurately range check any addresses computed against it. 148 cf: PR binutils/17512: file: 1085-1761-0.004. 149 For now we do the best that we can. */ 150 if (addr < (unsigned char *) data 151 || addr > ((unsigned char *) data) + input_section->size) 152 { 153 bfd_set_error (bfd_error_bad_value); 154 return bfd_reloc_notsupported; 155 } 156 157 switch (howto->size) 158 { 159 case 0: 160 { 161 char x = bfd_get_8 (abfd, addr); 162 DOIT (x); 163 bfd_put_8 (abfd, x, addr); 164 } 165 break; 166 167 case 1: 168 { 169 short x = bfd_get_16 (abfd, addr); 170 DOIT (x); 171 bfd_put_16 (abfd, (bfd_vma) x, addr); 172 } 173 break; 174 175 case 2: 176 { 177 long x = bfd_get_32 (abfd, addr); 178 DOIT (x); 179 bfd_put_32 (abfd, (bfd_vma) x, addr); 180 } 181 break; 182 183 case 4: 184 { 185 long long x = bfd_get_64 (abfd, addr); 186 DOIT (x); 187 bfd_put_64 (abfd, (bfd_vma) x, addr); 188 } 189 break; 190 191 default: 192 bfd_set_error (bfd_error_bad_value); 193 return bfd_reloc_notsupported; 194 } 195 } 196 197 /* Now let bfd_perform_relocation finish everything up. */ 198 return bfd_reloc_continue; 199 } 200 201 #if defined(COFF_WITH_PE) 202 /* Return TRUE if this relocation should appear in the output .reloc 203 section. */ 204 205 static bfd_boolean 206 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto) 207 { 208 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE 209 && howto->type != R_AMD64_SECREL; 210 } 211 #endif /* COFF_WITH_PE */ 212 213 #ifndef PCRELOFFSET 214 #define PCRELOFFSET TRUE 215 #endif 216 217 static reloc_howto_type howto_table[] = 218 { 219 EMPTY_HOWTO (0), 220 HOWTO (R_AMD64_DIR64, /* type 1*/ 221 0, /* rightshift */ 222 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */ 223 64, /* bitsize */ 224 FALSE, /* pc_relative */ 225 0, /* bitpos */ 226 complain_overflow_bitfield, /* complain_on_overflow */ 227 coff_amd64_reloc, /* special_function */ 228 "R_X86_64_64", /* name */ 229 TRUE, /* partial_inplace */ 230 0xffffffffffffffffll, /* src_mask */ 231 0xffffffffffffffffll, /* dst_mask */ 232 TRUE), /* pcrel_offset */ 233 HOWTO (R_AMD64_DIR32, /* type 2 */ 234 0, /* rightshift */ 235 2, /* size (0 = byte, 1 = short, 2 = long) */ 236 32, /* bitsize */ 237 FALSE, /* pc_relative */ 238 0, /* bitpos */ 239 complain_overflow_bitfield, /* complain_on_overflow */ 240 coff_amd64_reloc, /* special_function */ 241 "R_X86_64_32", /* name */ 242 TRUE, /* partial_inplace */ 243 0xffffffff, /* src_mask */ 244 0xffffffff, /* dst_mask */ 245 TRUE), /* pcrel_offset */ 246 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */ 247 HOWTO (R_AMD64_IMAGEBASE, /* type */ 248 0, /* rightshift */ 249 2, /* size (0 = byte, 1 = short, 2 = long) */ 250 32, /* bitsize */ 251 FALSE, /* pc_relative */ 252 0, /* bitpos */ 253 complain_overflow_bitfield, /* complain_on_overflow */ 254 coff_amd64_reloc, /* special_function */ 255 "rva32", /* name */ 256 TRUE, /* partial_inplace */ 257 0xffffffff, /* src_mask */ 258 0xffffffff, /* dst_mask */ 259 FALSE), /* pcrel_offset */ 260 /* 32-bit longword PC relative relocation (4). */ 261 HOWTO (R_AMD64_PCRLONG, /* type 4 */ 262 0, /* rightshift */ 263 2, /* size (0 = byte, 1 = short, 2 = long) */ 264 32, /* bitsize */ 265 TRUE, /* pc_relative */ 266 0, /* bitpos */ 267 complain_overflow_signed, /* complain_on_overflow */ 268 coff_amd64_reloc, /* special_function */ 269 "R_X86_64_PC32", /* name */ 270 TRUE, /* partial_inplace */ 271 0xffffffff, /* src_mask */ 272 0xffffffff, /* dst_mask */ 273 PCRELOFFSET), /* pcrel_offset */ 274 275 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */ 276 0, /* rightshift */ 277 2, /* size (0 = byte, 1 = short, 2 = long) */ 278 32, /* bitsize */ 279 TRUE, /* pc_relative */ 280 0, /* bitpos */ 281 complain_overflow_signed, /* complain_on_overflow */ 282 coff_amd64_reloc, /* special_function */ 283 "DISP32+1", /* name */ 284 TRUE, /* partial_inplace */ 285 0xffffffff, /* src_mask */ 286 0xffffffff, /* dst_mask */ 287 PCRELOFFSET), /* pcrel_offset */ 288 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */ 289 0, /* rightshift */ 290 2, /* size (0 = byte, 1 = short, 2 = long) */ 291 32, /* bitsize */ 292 TRUE, /* pc_relative */ 293 0, /* bitpos */ 294 complain_overflow_signed, /* complain_on_overflow */ 295 coff_amd64_reloc, /* special_function */ 296 "DISP32+2", /* name */ 297 TRUE, /* partial_inplace */ 298 0xffffffff, /* src_mask */ 299 0xffffffff, /* dst_mask */ 300 PCRELOFFSET), /* pcrel_offset */ 301 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */ 302 0, /* rightshift */ 303 2, /* size (0 = byte, 1 = short, 2 = long) */ 304 32, /* bitsize */ 305 TRUE, /* pc_relative */ 306 0, /* bitpos */ 307 complain_overflow_signed, /* complain_on_overflow */ 308 coff_amd64_reloc, /* special_function */ 309 "DISP32+3", /* name */ 310 TRUE, /* partial_inplace */ 311 0xffffffff, /* src_mask */ 312 0xffffffff, /* dst_mask */ 313 PCRELOFFSET), /* pcrel_offset */ 314 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */ 315 0, /* rightshift */ 316 2, /* size (0 = byte, 1 = short, 2 = long) */ 317 32, /* bitsize */ 318 TRUE, /* pc_relative */ 319 0, /* bitpos */ 320 complain_overflow_signed, /* complain_on_overflow */ 321 coff_amd64_reloc, /* special_function */ 322 "DISP32+4", /* name */ 323 TRUE, /* partial_inplace */ 324 0xffffffff, /* src_mask */ 325 0xffffffff, /* dst_mask */ 326 PCRELOFFSET), /* pcrel_offset */ 327 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */ 328 0, /* rightshift */ 329 2, /* size (0 = byte, 1 = short, 2 = long) */ 330 32, /* bitsize */ 331 TRUE, /* pc_relative */ 332 0, /* bitpos */ 333 complain_overflow_signed, /* complain_on_overflow */ 334 coff_amd64_reloc, /* special_function */ 335 "DISP32+5", /* name */ 336 TRUE, /* partial_inplace */ 337 0xffffffff, /* src_mask */ 338 0xffffffff, /* dst_mask */ 339 PCRELOFFSET), /* pcrel_offset */ 340 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */ 341 #if defined(COFF_WITH_PE) 342 /* 32-bit longword section relative relocation (11). */ 343 HOWTO (R_AMD64_SECREL, /* type */ 344 0, /* rightshift */ 345 2, /* size (0 = byte, 1 = short, 2 = long) */ 346 32, /* bitsize */ 347 FALSE, /* pc_relative */ 348 0, /* bitpos */ 349 complain_overflow_bitfield, /* complain_on_overflow */ 350 coff_amd64_reloc, /* special_function */ 351 "secrel32", /* name */ 352 TRUE, /* partial_inplace */ 353 0xffffffff, /* src_mask */ 354 0xffffffff, /* dst_mask */ 355 TRUE), /* pcrel_offset */ 356 #else 357 EMPTY_HOWTO (11), 358 #endif 359 EMPTY_HOWTO (12), 360 EMPTY_HOWTO (13), 361 #ifndef DONT_EXTEND_AMD64 362 HOWTO (R_AMD64_PCRQUAD, 363 0, /* rightshift */ 364 4, /* size (0 = byte, 1 = short, 2 = long) */ 365 64, /* bitsize */ 366 TRUE, /* pc_relative */ 367 0, /* bitpos */ 368 complain_overflow_signed, /* complain_on_overflow */ 369 coff_amd64_reloc, /* special_function */ 370 "R_X86_64_PC64", /* name */ 371 TRUE, /* partial_inplace */ 372 0xffffffffffffffffll, /* src_mask */ 373 0xffffffffffffffffll, /* dst_mask */ 374 PCRELOFFSET), /* pcrel_offset */ 375 #else 376 EMPTY_HOWTO (14), 377 #endif 378 /* Byte relocation (15). */ 379 HOWTO (R_RELBYTE, /* type */ 380 0, /* rightshift */ 381 0, /* size (0 = byte, 1 = short, 2 = long) */ 382 8, /* bitsize */ 383 FALSE, /* pc_relative */ 384 0, /* bitpos */ 385 complain_overflow_bitfield, /* complain_on_overflow */ 386 coff_amd64_reloc, /* special_function */ 387 "R_X86_64_8", /* name */ 388 TRUE, /* partial_inplace */ 389 0x000000ff, /* src_mask */ 390 0x000000ff, /* dst_mask */ 391 PCRELOFFSET), /* pcrel_offset */ 392 /* 16-bit word relocation (16). */ 393 HOWTO (R_RELWORD, /* type */ 394 0, /* rightshift */ 395 1, /* size (0 = byte, 1 = short, 2 = long) */ 396 16, /* bitsize */ 397 FALSE, /* pc_relative */ 398 0, /* bitpos */ 399 complain_overflow_bitfield, /* complain_on_overflow */ 400 coff_amd64_reloc, /* special_function */ 401 "R_X86_64_16", /* name */ 402 TRUE, /* partial_inplace */ 403 0x0000ffff, /* src_mask */ 404 0x0000ffff, /* dst_mask */ 405 PCRELOFFSET), /* pcrel_offset */ 406 /* 32-bit longword relocation (17). */ 407 HOWTO (R_RELLONG, /* type */ 408 0, /* rightshift */ 409 2, /* size (0 = byte, 1 = short, 2 = long) */ 410 32, /* bitsize */ 411 FALSE, /* pc_relative */ 412 0, /* bitpos */ 413 complain_overflow_bitfield, /* complain_on_overflow */ 414 coff_amd64_reloc, /* special_function */ 415 "R_X86_64_32S", /* name */ 416 TRUE, /* partial_inplace */ 417 0xffffffff, /* src_mask */ 418 0xffffffff, /* dst_mask */ 419 PCRELOFFSET), /* pcrel_offset */ 420 /* Byte PC relative relocation (18). */ 421 HOWTO (R_PCRBYTE, /* type */ 422 0, /* rightshift */ 423 0, /* size (0 = byte, 1 = short, 2 = long) */ 424 8, /* bitsize */ 425 TRUE, /* pc_relative */ 426 0, /* bitpos */ 427 complain_overflow_signed, /* complain_on_overflow */ 428 coff_amd64_reloc, /* special_function */ 429 "R_X86_64_PC8", /* name */ 430 TRUE, /* partial_inplace */ 431 0x000000ff, /* src_mask */ 432 0x000000ff, /* dst_mask */ 433 PCRELOFFSET), /* pcrel_offset */ 434 /* 16-bit word PC relative relocation (19). */ 435 HOWTO (R_PCRWORD, /* type */ 436 0, /* rightshift */ 437 1, /* size (0 = byte, 1 = short, 2 = long) */ 438 16, /* bitsize */ 439 TRUE, /* pc_relative */ 440 0, /* bitpos */ 441 complain_overflow_signed, /* complain_on_overflow */ 442 coff_amd64_reloc, /* special_function */ 443 "R_X86_64_PC16", /* name */ 444 TRUE, /* partial_inplace */ 445 0x0000ffff, /* src_mask */ 446 0x0000ffff, /* dst_mask */ 447 PCRELOFFSET), /* pcrel_offset */ 448 /* 32-bit longword PC relative relocation (20). */ 449 HOWTO (R_PCRLONG, /* type */ 450 0, /* rightshift */ 451 2, /* size (0 = byte, 1 = short, 2 = long) */ 452 32, /* bitsize */ 453 TRUE, /* pc_relative */ 454 0, /* bitpos */ 455 complain_overflow_signed, /* complain_on_overflow */ 456 coff_amd64_reloc, /* special_function */ 457 "R_X86_64_PC32", /* name */ 458 TRUE, /* partial_inplace */ 459 0xffffffff, /* src_mask */ 460 0xffffffff, /* dst_mask */ 461 PCRELOFFSET) /* pcrel_offset */ 462 }; 463 464 #define NUM_HOWTOS ARRAY_SIZE (howto_table) 465 466 /* Turn a howto into a reloc nunmber */ 467 468 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } 469 #define I386 1 /* Customize coffcode.h */ 470 #define AMD64 1 471 472 #define RTYPE2HOWTO(cache_ptr, dst) \ 473 ((cache_ptr)->howto = \ 474 ((dst)->r_type < NUM_HOWTOS) \ 475 ? howto_table + (dst)->r_type \ 476 : NULL) 477 478 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared 479 library. On some other COFF targets STYP_BSS is normally 480 STYP_NOLOAD. */ 481 #define BSS_NOLOAD_IS_SHARED_LIBRARY 482 483 /* Compute the addend of a reloc. If the reloc is to a common symbol, 484 the object file contains the value of the common symbol. By the 485 time this is called, the linker may be using a different symbol 486 from a different object file with a different value. Therefore, we 487 hack wildly to locate the original symbol from this file so that we 488 can make the correct adjustment. This macro sets coffsym to the 489 symbol from the original file, and uses it to set the addend value 490 correctly. If this is not a common symbol, the usual addend 491 calculation is done, except that an additional tweak is needed for 492 PC relative relocs. 493 FIXME: This macro refers to symbols and asect; these are from the 494 calling function, not the macro arguments. */ 495 496 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ 497 { \ 498 coff_symbol_type *coffsym = NULL; \ 499 \ 500 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ 501 coffsym = (obj_symbols (abfd) \ 502 + (cache_ptr->sym_ptr_ptr - symbols)); \ 503 else if (ptr) \ 504 coffsym = coff_symbol_from (ptr); \ 505 \ 506 if (coffsym != NULL \ 507 && coffsym->native->u.syment.n_scnum == 0) \ 508 cache_ptr->addend = - coffsym->native->u.syment.n_value; \ 509 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ 510 && ptr->section != NULL) \ 511 cache_ptr->addend = - (ptr->section->vma + ptr->value); \ 512 else \ 513 cache_ptr->addend = 0; \ 514 if (ptr && reloc.r_type < NUM_HOWTOS \ 515 && howto_table[reloc.r_type].pc_relative) \ 516 cache_ptr->addend += asect->vma; \ 517 } 518 519 /* We use the special COFF backend linker. For normal AMD64 COFF, we 520 can use the generic relocate_section routine. For PE, we need our 521 own routine. */ 522 523 #if !defined(COFF_WITH_PE) 524 525 #define coff_relocate_section _bfd_coff_generic_relocate_section 526 527 #else /* COFF_WITH_PE */ 528 529 /* The PE relocate section routine. The only difference between this 530 and the regular routine is that we don't want to do anything for a 531 relocatable link. */ 532 533 static bfd_boolean 534 coff_pe_amd64_relocate_section (bfd *output_bfd, 535 struct bfd_link_info *info, 536 bfd *input_bfd, 537 asection *input_section, 538 bfd_byte *contents, 539 struct internal_reloc *relocs, 540 struct internal_syment *syms, 541 asection **sections) 542 { 543 if (bfd_link_relocatable (info)) 544 return TRUE; 545 546 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections); 547 } 548 549 #define coff_relocate_section coff_pe_amd64_relocate_section 550 551 #endif /* COFF_WITH_PE */ 552 553 /* Convert an rtype to howto for the COFF backend linker. */ 554 555 static reloc_howto_type * 556 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 557 asection *sec, 558 struct internal_reloc *rel, 559 struct coff_link_hash_entry *h, 560 struct internal_syment *sym, 561 bfd_vma *addendp) 562 { 563 reloc_howto_type *howto; 564 565 if (rel->r_type >= NUM_HOWTOS) 566 { 567 bfd_set_error (bfd_error_bad_value); 568 return NULL; 569 } 570 howto = howto_table + rel->r_type; 571 572 #if defined(COFF_WITH_PE) 573 /* Cancel out code in _bfd_coff_generic_relocate_section. */ 574 *addendp = 0; 575 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5) 576 { 577 *addendp -= (bfd_vma)(rel->r_type - R_AMD64_PCRLONG); 578 rel->r_type = R_AMD64_PCRLONG; 579 } 580 #endif 581 582 if (howto->pc_relative) 583 *addendp += sec->vma; 584 585 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) 586 { 587 /* This is a common symbol. The section contents include the 588 size (sym->n_value) as an addend. The relocate_section 589 function will be adding in the final value of the symbol. We 590 need to subtract out the current size in order to get the 591 correct result. */ 592 BFD_ASSERT (h != NULL); 593 594 #if !defined(COFF_WITH_PE) 595 /* I think we *do* want to bypass this. If we don't, I have 596 seen some data parameters get the wrong relocation address. 597 If I link two versions with and without this section bypassed 598 and then do a binary comparison, the addresses which are 599 different can be looked up in the map. The case in which 600 this section has been bypassed has addresses which correspond 601 to values I can find in the map. */ 602 *addendp -= sym->n_value; 603 #endif 604 } 605 606 #if !defined(COFF_WITH_PE) 607 /* If the output symbol is common (in which case this must be a 608 relocatable link), we need to add in the final size of the 609 common symbol. */ 610 if (h != NULL && h->root.type == bfd_link_hash_common) 611 *addendp += h->root.u.c.size; 612 #endif 613 614 #if defined(COFF_WITH_PE) 615 if (howto->pc_relative) 616 { 617 *addendp -= 4; 618 619 /* If the symbol is defined, then the generic code is going to 620 add back the symbol value in order to cancel out an 621 adjustment it made to the addend. However, we set the addend 622 to 0 at the start of this function. We need to adjust here, 623 to avoid the adjustment the generic code will make. FIXME: 624 This is getting a bit hackish. */ 625 if (sym != NULL && sym->n_scnum != 0) 626 *addendp -= sym->n_value; 627 } 628 629 if (rel->r_type == R_AMD64_IMAGEBASE 630 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour)) 631 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; 632 633 if (rel->r_type == R_AMD64_SECREL) 634 { 635 bfd_vma osect_vma; 636 637 if (h && (h->root.type == bfd_link_hash_defined 638 || h->root.type == bfd_link_hash_defweak)) 639 osect_vma = h->root.u.def.section->output_section->vma; 640 else 641 { 642 asection *s; 643 int i; 644 645 /* Sigh, the only way to get the section to offset against 646 is to find it the hard way. */ 647 for (s = abfd->sections, i = 1; i < sym->n_scnum; i++) 648 s = s->next; 649 650 osect_vma = s->output_section->vma; 651 } 652 653 *addendp -= osect_vma; 654 } 655 #endif 656 657 return howto; 658 } 659 660 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup 661 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup 662 663 static reloc_howto_type * 664 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 665 { 666 switch (code) 667 { 668 case BFD_RELOC_RVA: 669 return howto_table + R_AMD64_IMAGEBASE; 670 case BFD_RELOC_32: 671 return howto_table + R_AMD64_DIR32; 672 case BFD_RELOC_64: 673 return howto_table + R_AMD64_DIR64; 674 case BFD_RELOC_64_PCREL: 675 #ifndef DONT_EXTEND_AMD64 676 return howto_table + R_AMD64_PCRQUAD; 677 #else 678 /* Fall through. */ 679 #endif 680 case BFD_RELOC_32_PCREL: 681 return howto_table + R_AMD64_PCRLONG; 682 case BFD_RELOC_X86_64_32S: 683 return howto_table + R_RELLONG; 684 case BFD_RELOC_16: 685 return howto_table + R_RELWORD; 686 case BFD_RELOC_16_PCREL: 687 return howto_table + R_PCRWORD; 688 case BFD_RELOC_8: 689 return howto_table + R_RELBYTE; 690 case BFD_RELOC_8_PCREL: 691 return howto_table + R_PCRBYTE; 692 #if defined(COFF_WITH_PE) 693 case BFD_RELOC_32_SECREL: 694 return howto_table + R_AMD64_SECREL; 695 #endif 696 default: 697 BFD_FAIL (); 698 return 0; 699 } 700 } 701 702 static reloc_howto_type * 703 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 704 const char *r_name) 705 { 706 unsigned int i; 707 708 for (i = 0; i < NUM_HOWTOS; i++) 709 if (howto_table[i].name != NULL 710 && strcasecmp (howto_table[i].name, r_name) == 0) 711 return &howto_table[i]; 712 713 return NULL; 714 } 715 716 #define coff_rtype_to_howto coff_amd64_rtype_to_howto 717 718 #ifdef TARGET_UNDERSCORE 719 720 /* If amd64 gcc uses underscores for symbol names, then it does not use 721 a leading dot for local labels, so if TARGET_UNDERSCORE is defined 722 we treat all symbols starting with L as local. */ 723 724 static bfd_boolean 725 coff_amd64_is_local_label_name (bfd *abfd, const char *name) 726 { 727 if (name[0] == 'L') 728 return TRUE; 729 730 return _bfd_coff_is_local_label_name (abfd, name); 731 } 732 733 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name 734 735 #endif /* TARGET_UNDERSCORE */ 736 737 #ifndef bfd_pe_print_pdata 738 #define bfd_pe_print_pdata NULL 739 #endif 740 741 #include "coffcode.h" 742 743 #ifdef PE 744 #define amd64coff_object_p pe_bfd_object_p 745 #else 746 #define amd64coff_object_p coff_object_p 747 #endif 748 749 const bfd_target 750 #ifdef TARGET_SYM 751 TARGET_SYM = 752 #else 753 x86_64_coff_vec = 754 #endif 755 { 756 #ifdef TARGET_NAME 757 TARGET_NAME, 758 #else 759 "coff-x86-64", /* Name. */ 760 #endif 761 bfd_target_coff_flavour, 762 BFD_ENDIAN_LITTLE, /* Data byte order is little. */ 763 BFD_ENDIAN_LITTLE, /* Header byte order is little. */ 764 765 (HAS_RELOC | EXEC_P | /* Object flags. */ 766 HAS_LINENO | HAS_DEBUG | 767 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS), 768 769 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 770 #if defined(COFF_WITH_PE) 771 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING 772 #endif 773 | SEC_CODE | SEC_DATA | SEC_EXCLUDE ), 774 775 #ifdef TARGET_UNDERSCORE 776 TARGET_UNDERSCORE, /* Leading underscore. */ 777 #else 778 0, /* Leading underscore. */ 779 #endif 780 '/', /* Ar_pad_char. */ 781 15, /* Ar_max_namelen. */ 782 0, /* match priority. */ 783 784 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 785 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 786 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ 787 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 788 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 789 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */ 790 791 /* Note that we allow an object file to be treated as a core file as well. */ 792 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */ 793 bfd_generic_archive_p, amd64coff_object_p }, 794 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ 795 bfd_false }, 796 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */ 797 _bfd_write_archive_contents, bfd_false }, 798 799 BFD_JUMP_TABLE_GENERIC (coff), 800 BFD_JUMP_TABLE_COPY (coff), 801 BFD_JUMP_TABLE_CORE (_bfd_nocore), 802 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 803 BFD_JUMP_TABLE_SYMBOLS (coff), 804 BFD_JUMP_TABLE_RELOCS (coff), 805 BFD_JUMP_TABLE_WRITE (coff), 806 BFD_JUMP_TABLE_LINK (coff), 807 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 808 809 NULL, 810 811 COFF_SWAP_TABLE 812 }; 813
