peicode.h revision 1.1.1.3
1 /* Support for the generic parts of PE/PEI, for BFD. 2 Copyright (C) 1995-2015 Free Software Foundation, Inc. 3 Written by Cygnus Solutions. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 23 /* Most of this hacked by Steve Chamberlain, 24 sac (at) cygnus.com 25 26 PE/PEI rearrangement (and code added): Donn Terry 27 Softway Systems, Inc. */ 28 29 /* Hey look, some documentation [and in a place you expect to find it]! 30 31 The main reference for the pei format is "Microsoft Portable Executable 32 and Common Object File Format Specification 4.1". Get it if you need to 33 do some serious hacking on this code. 34 35 Another reference: 36 "Peering Inside the PE: A Tour of the Win32 Portable Executable 37 File Format", MSJ 1994, Volume 9. 38 39 The *sole* difference between the pe format and the pei format is that the 40 latter has an MSDOS 2.0 .exe header on the front that prints the message 41 "This app must be run under Windows." (or some such). 42 (FIXME: Whether that statement is *really* true or not is unknown. 43 Are there more subtle differences between pe and pei formats? 44 For now assume there aren't. If you find one, then for God sakes 45 document it here!) 46 47 The Microsoft docs use the word "image" instead of "executable" because 48 the former can also refer to a DLL (shared library). Confusion can arise 49 because the `i' in `pei' also refers to "image". The `pe' format can 50 also create images (i.e. executables), it's just that to run on a win32 51 system you need to use the pei format. 52 53 FIXME: Please add more docs here so the next poor fool that has to hack 54 on this code has a chance of getting something accomplished without 55 wasting too much time. */ 56 57 #include "libpei.h" 58 59 static bfd_boolean (*pe_saved_coff_bfd_print_private_bfd_data) (bfd *, void *) = 60 #ifndef coff_bfd_print_private_bfd_data 61 NULL; 62 #else 63 coff_bfd_print_private_bfd_data; 64 #undef coff_bfd_print_private_bfd_data 65 #endif 66 67 static bfd_boolean pe_print_private_bfd_data (bfd *, void *); 68 #define coff_bfd_print_private_bfd_data pe_print_private_bfd_data 69 70 static bfd_boolean (*pe_saved_coff_bfd_copy_private_bfd_data) (bfd *, bfd *) = 71 #ifndef coff_bfd_copy_private_bfd_data 72 NULL; 73 #else 74 coff_bfd_copy_private_bfd_data; 75 #undef coff_bfd_copy_private_bfd_data 76 #endif 77 78 static bfd_boolean pe_bfd_copy_private_bfd_data (bfd *, bfd *); 79 #define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data 80 81 #define coff_mkobject pe_mkobject 82 #define coff_mkobject_hook pe_mkobject_hook 83 84 #ifdef COFF_IMAGE_WITH_PE 85 /* This structure contains static variables used by the ILF code. */ 86 typedef asection * asection_ptr; 87 88 typedef struct 89 { 90 bfd * abfd; 91 bfd_byte * data; 92 struct bfd_in_memory * bim; 93 unsigned short magic; 94 95 arelent * reltab; 96 unsigned int relcount; 97 98 coff_symbol_type * sym_cache; 99 coff_symbol_type * sym_ptr; 100 unsigned int sym_index; 101 102 unsigned int * sym_table; 103 unsigned int * table_ptr; 104 105 combined_entry_type * native_syms; 106 combined_entry_type * native_ptr; 107 108 coff_symbol_type ** sym_ptr_table; 109 coff_symbol_type ** sym_ptr_ptr; 110 111 unsigned int sec_index; 112 113 char * string_table; 114 char * string_ptr; 115 char * end_string_ptr; 116 117 SYMENT * esym_table; 118 SYMENT * esym_ptr; 119 120 struct internal_reloc * int_reltab; 121 } 122 pe_ILF_vars; 123 #endif /* COFF_IMAGE_WITH_PE */ 124 125 const bfd_target *coff_real_object_p 126 (bfd *, unsigned, struct internal_filehdr *, struct internal_aouthdr *); 127 128 #ifndef NO_COFF_RELOCS 130 static void 131 coff_swap_reloc_in (bfd * abfd, void * src, void * dst) 132 { 133 RELOC *reloc_src = (RELOC *) src; 134 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; 135 136 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); 137 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); 138 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); 139 #ifdef SWAP_IN_RELOC_OFFSET 140 reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset); 141 #endif 142 } 143 144 static unsigned int 145 coff_swap_reloc_out (bfd * abfd, void * src, void * dst) 146 { 147 struct internal_reloc *reloc_src = (struct internal_reloc *) src; 148 struct external_reloc *reloc_dst = (struct external_reloc *) dst; 149 150 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); 151 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); 152 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); 153 154 #ifdef SWAP_OUT_RELOC_OFFSET 155 SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset); 156 #endif 157 #ifdef SWAP_OUT_RELOC_EXTRA 158 SWAP_OUT_RELOC_EXTRA (abfd, reloc_src, reloc_dst); 159 #endif 160 return RELSZ; 161 } 162 #endif /* not NO_COFF_RELOCS */ 163 164 #ifdef COFF_IMAGE_WITH_PE 165 #undef FILHDR 166 #define FILHDR struct external_PEI_IMAGE_hdr 167 #endif 168 169 static void 170 coff_swap_filehdr_in (bfd * abfd, void * src, void * dst) 171 { 172 FILHDR *filehdr_src = (FILHDR *) src; 173 struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst; 174 175 filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic); 176 filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src->f_nscns); 177 filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->f_timdat); 178 filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src->f_nsyms); 179 filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src->f_flags); 180 filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr); 181 182 /* Other people's tools sometimes generate headers with an nsyms but 183 a zero symptr. */ 184 if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0) 185 { 186 filehdr_dst->f_nsyms = 0; 187 filehdr_dst->f_flags |= F_LSYMS; 188 } 189 190 filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr); 191 } 192 193 #ifdef COFF_IMAGE_WITH_PE 194 # define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out 195 #elif defined COFF_WITH_pex64 196 # define coff_swap_filehdr_out _bfd_pex64_only_swap_filehdr_out 197 #elif defined COFF_WITH_pep 198 # define coff_swap_filehdr_out _bfd_pep_only_swap_filehdr_out 199 #else 200 # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out 201 #endif 202 203 static void 204 coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in) 205 { 206 SCNHDR *scnhdr_ext = (SCNHDR *) ext; 207 struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in; 208 209 memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name)); 210 211 scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr); 212 scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr); 213 scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size); 214 scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr); 215 scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr); 216 scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr); 217 scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags); 218 219 /* MS handles overflow of line numbers by carrying into the reloc 220 field (it appears). Since it's supposed to be zero for PE 221 *IMAGE* format, that's safe. This is still a bit iffy. */ 222 #ifdef COFF_IMAGE_WITH_PE 223 scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno) 224 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16)); 225 scnhdr_int->s_nreloc = 0; 226 #else 227 scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc); 228 scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno); 229 #endif 230 231 if (scnhdr_int->s_vaddr != 0) 232 { 233 scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase; 234 /* Do not cut upper 32-bits for 64-bit vma. */ 235 #ifndef COFF_WITH_pex64 236 scnhdr_int->s_vaddr &= 0xffffffff; 237 #endif 238 } 239 240 #ifndef COFF_NO_HACK_SCNHDR_SIZE 241 /* If this section holds uninitialized data and is from an object file 242 or from an executable image that has not initialized the field, 243 or if the image is an executable file and the physical size is padded, 244 use the virtual size (stored in s_paddr) instead. */ 245 if (scnhdr_int->s_paddr > 0 246 && (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 247 && (! bfd_pei_p (abfd) || scnhdr_int->s_size == 0)) 248 || (bfd_pei_p (abfd) && (scnhdr_int->s_size > scnhdr_int->s_paddr)))) 249 /* This code used to set scnhdr_int->s_paddr to 0. However, 250 coff_set_alignment_hook stores s_paddr in virt_size, which 251 only works if it correctly holds the virtual size of the 252 section. */ 253 scnhdr_int->s_size = scnhdr_int->s_paddr; 254 #endif 255 } 256 257 static bfd_boolean 258 pe_mkobject (bfd * abfd) 259 { 260 pe_data_type *pe; 261 bfd_size_type amt = sizeof (pe_data_type); 262 263 abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt); 264 265 if (abfd->tdata.pe_obj_data == 0) 266 return FALSE; 267 268 pe = pe_data (abfd); 269 270 pe->coff.pe = 1; 271 272 /* in_reloc_p is architecture dependent. */ 273 pe->in_reloc_p = in_reloc_p; 274 275 memset (& pe->pe_opthdr, 0, sizeof pe->pe_opthdr); 276 return TRUE; 277 } 278 279 /* Create the COFF backend specific information. */ 280 281 static void * 282 pe_mkobject_hook (bfd * abfd, 283 void * filehdr, 284 void * aouthdr ATTRIBUTE_UNUSED) 285 { 286 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; 287 pe_data_type *pe; 288 289 if (! pe_mkobject (abfd)) 290 return NULL; 291 292 pe = pe_data (abfd); 293 pe->coff.sym_filepos = internal_f->f_symptr; 294 /* These members communicate important constants about the symbol 295 table to GDB's symbol-reading code. These `constants' 296 unfortunately vary among coff implementations... */ 297 pe->coff.local_n_btmask = N_BTMASK; 298 pe->coff.local_n_btshft = N_BTSHFT; 299 pe->coff.local_n_tmask = N_TMASK; 300 pe->coff.local_n_tshift = N_TSHIFT; 301 pe->coff.local_symesz = SYMESZ; 302 pe->coff.local_auxesz = AUXESZ; 303 pe->coff.local_linesz = LINESZ; 304 305 pe->coff.timestamp = internal_f->f_timdat; 306 307 obj_raw_syment_count (abfd) = 308 obj_conv_table_size (abfd) = 309 internal_f->f_nsyms; 310 311 pe->real_flags = internal_f->f_flags; 312 313 if ((internal_f->f_flags & F_DLL) != 0) 314 pe->dll = 1; 315 316 if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) 317 abfd->flags |= HAS_DEBUG; 318 319 #ifdef COFF_IMAGE_WITH_PE 320 if (aouthdr) 321 pe->pe_opthdr = ((struct internal_aouthdr *) aouthdr)->pe; 322 #endif 323 324 #ifdef ARM 325 if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) 326 coff_data (abfd) ->flags = 0; 327 #endif 328 329 return (void *) pe; 330 } 331 332 static bfd_boolean 333 pe_print_private_bfd_data (bfd *abfd, void * vfile) 334 { 335 FILE *file = (FILE *) vfile; 336 337 if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile)) 338 return FALSE; 339 340 if (pe_saved_coff_bfd_print_private_bfd_data == NULL) 341 return TRUE; 342 343 fputc ('\n', file); 344 345 return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile); 346 } 347 348 /* Copy any private info we understand from the input bfd 349 to the output bfd. */ 350 351 static bfd_boolean 352 pe_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 353 { 354 /* PR binutils/716: Copy the large address aware flag. 355 XXX: Should we be copying other flags or other fields in the pe_data() 356 structure ? */ 357 if (pe_data (obfd) != NULL 358 && pe_data (ibfd) != NULL 359 && pe_data (ibfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE) 360 pe_data (obfd)->real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE; 361 362 if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd)) 363 return FALSE; 364 365 if (pe_saved_coff_bfd_copy_private_bfd_data) 366 return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd); 367 368 return TRUE; 369 } 370 371 #define coff_bfd_copy_private_section_data \ 372 _bfd_XX_bfd_copy_private_section_data 373 374 #define coff_get_symbol_info _bfd_XX_get_symbol_info 375 376 #ifdef COFF_IMAGE_WITH_PE 377 378 /* Code to handle Microsoft's Image Library Format. 380 Also known as LINK6 format. 381 Documentation about this format can be found at: 382 383 http://msdn.microsoft.com/library/specs/pecoff_section8.htm */ 384 385 /* The following constants specify the sizes of the various data 386 structures that we have to create in order to build a bfd describing 387 an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6 388 and SIZEOF_IDATA7 below is to allow for the possibility that we might 389 need a padding byte in order to ensure 16 bit alignment for the section's 390 contents. 391 392 The value for SIZEOF_ILF_STRINGS is computed as follows: 393 394 There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters 395 per symbol for their names (longest section name is .idata$x). 396 397 There will be two symbols for the imported value, one the symbol name 398 and one with _imp__ prefixed. Allowing for the terminating nul's this 399 is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll). 400 401 The strings in the string table must start STRING__SIZE_SIZE bytes into 402 the table in order to for the string lookup code in coffgen/coffcode to 403 work. */ 404 #define NUM_ILF_RELOCS 8 405 #define NUM_ILF_SECTIONS 6 406 #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS) 407 408 #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache)) 409 #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table)) 410 #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms)) 411 #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table)) 412 #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table)) 413 #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab)) 414 #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab)) 415 #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \ 416 + 21 + strlen (source_dll) \ 417 + NUM_ILF_SECTIONS * 9 \ 418 + STRING_SIZE_SIZE) 419 #define SIZEOF_IDATA2 (5 * 4) 420 421 /* For PEx64 idata4 & 5 have thumb size of 8 bytes. */ 422 #ifdef COFF_WITH_pex64 423 #define SIZEOF_IDATA4 (2 * 4) 424 #define SIZEOF_IDATA5 (2 * 4) 425 #else 426 #define SIZEOF_IDATA4 (1 * 4) 427 #define SIZEOF_IDATA5 (1 * 4) 428 #endif 429 430 #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1) 431 #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1) 432 #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata)) 433 434 #define ILF_DATA_SIZE \ 435 + SIZEOF_ILF_SYMS \ 436 + SIZEOF_ILF_SYM_TABLE \ 437 + SIZEOF_ILF_NATIVE_SYMS \ 438 + SIZEOF_ILF_SYM_PTR_TABLE \ 439 + SIZEOF_ILF_EXT_SYMS \ 440 + SIZEOF_ILF_RELOCS \ 441 + SIZEOF_ILF_INT_RELOCS \ 442 + SIZEOF_ILF_STRINGS \ 443 + SIZEOF_IDATA2 \ 444 + SIZEOF_IDATA4 \ 445 + SIZEOF_IDATA5 \ 446 + SIZEOF_IDATA6 \ 447 + SIZEOF_IDATA7 \ 448 + SIZEOF_ILF_SECTIONS \ 449 + MAX_TEXT_SECTION_SIZE 450 451 /* Create an empty relocation against the given symbol. */ 452 453 static void 454 pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars, 455 bfd_vma address, 456 bfd_reloc_code_real_type reloc, 457 struct bfd_symbol ** sym, 458 unsigned int sym_index) 459 { 460 arelent * entry; 461 struct internal_reloc * internal; 462 463 entry = vars->reltab + vars->relcount; 464 internal = vars->int_reltab + vars->relcount; 465 466 entry->address = address; 467 entry->addend = 0; 468 entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc); 469 entry->sym_ptr_ptr = sym; 470 471 internal->r_vaddr = address; 472 internal->r_symndx = sym_index; 473 internal->r_type = entry->howto->type; 474 475 vars->relcount ++; 476 477 BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS); 478 } 479 480 /* Create an empty relocation against the given section. */ 481 482 static void 483 pe_ILF_make_a_reloc (pe_ILF_vars * vars, 484 bfd_vma address, 485 bfd_reloc_code_real_type reloc, 486 asection_ptr sec) 487 { 488 pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr, 489 coff_section_data (vars->abfd, sec)->i); 490 } 491 492 /* Move the queued relocs into the given section. */ 493 494 static void 495 pe_ILF_save_relocs (pe_ILF_vars * vars, 496 asection_ptr sec) 497 { 498 /* Make sure that there is somewhere to store the internal relocs. */ 499 if (coff_section_data (vars->abfd, sec) == NULL) 500 /* We should probably return an error indication here. */ 501 abort (); 502 503 coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab; 504 coff_section_data (vars->abfd, sec)->keep_relocs = TRUE; 505 506 sec->relocation = vars->reltab; 507 sec->reloc_count = vars->relcount; 508 sec->flags |= SEC_RELOC; 509 510 vars->reltab += vars->relcount; 511 vars->int_reltab += vars->relcount; 512 vars->relcount = 0; 513 514 BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table); 515 } 516 517 /* Create a global symbol and add it to the relevant tables. */ 518 519 static void 520 pe_ILF_make_a_symbol (pe_ILF_vars * vars, 521 const char * prefix, 522 const char * symbol_name, 523 asection_ptr section, 524 flagword extra_flags) 525 { 526 coff_symbol_type * sym; 527 combined_entry_type * ent; 528 SYMENT * esym; 529 unsigned short sclass; 530 531 if (extra_flags & BSF_LOCAL) 532 sclass = C_STAT; 533 else 534 sclass = C_EXT; 535 536 #ifdef THUMBPEMAGIC 537 if (vars->magic == THUMBPEMAGIC) 538 { 539 if (extra_flags & BSF_FUNCTION) 540 sclass = C_THUMBEXTFUNC; 541 else if (extra_flags & BSF_LOCAL) 542 sclass = C_THUMBSTAT; 543 else 544 sclass = C_THUMBEXT; 545 } 546 #endif 547 548 BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS); 549 550 sym = vars->sym_ptr; 551 ent = vars->native_ptr; 552 esym = vars->esym_ptr; 553 554 /* Copy the symbol's name into the string table. */ 555 sprintf (vars->string_ptr, "%s%s", prefix, symbol_name); 556 557 if (section == NULL) 558 section = bfd_und_section_ptr; 559 560 /* Initialise the external symbol. */ 561 H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table, 562 esym->e.e.e_offset); 563 H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum); 564 esym->e_sclass[0] = sclass; 565 566 /* The following initialisations are unnecessary - the memory is 567 zero initialised. They are just kept here as reminders. */ 568 569 /* Initialise the internal symbol structure. */ 570 ent->u.syment.n_sclass = sclass; 571 ent->u.syment.n_scnum = section->target_index; 572 ent->u.syment._n._n_n._n_offset = (bfd_hostptr_t) sym; 573 ent->is_sym = TRUE; 574 575 sym->symbol.the_bfd = vars->abfd; 576 sym->symbol.name = vars->string_ptr; 577 sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags; 578 sym->symbol.section = section; 579 sym->native = ent; 580 581 * vars->table_ptr = vars->sym_index; 582 * vars->sym_ptr_ptr = sym; 583 584 /* Adjust pointers for the next symbol. */ 585 vars->sym_index ++; 586 vars->sym_ptr ++; 587 vars->sym_ptr_ptr ++; 588 vars->table_ptr ++; 589 vars->native_ptr ++; 590 vars->esym_ptr ++; 591 vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1; 592 593 BFD_ASSERT (vars->string_ptr < vars->end_string_ptr); 594 } 595 596 /* Create a section. */ 597 598 static asection_ptr 599 pe_ILF_make_a_section (pe_ILF_vars * vars, 600 const char * name, 601 unsigned int size, 602 flagword extra_flags) 603 { 604 asection_ptr sec; 605 flagword flags; 606 607 sec = bfd_make_section_old_way (vars->abfd, name); 608 if (sec == NULL) 609 return NULL; 610 611 flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY; 612 613 bfd_set_section_flags (vars->abfd, sec, flags | extra_flags); 614 615 (void) bfd_set_section_alignment (vars->abfd, sec, 2); 616 617 /* Check that we will not run out of space. */ 618 BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size); 619 620 /* Set the section size and contents. The actual 621 contents are filled in by our parent. */ 622 bfd_set_section_size (vars->abfd, sec, (bfd_size_type) size); 623 sec->contents = vars->data; 624 sec->target_index = vars->sec_index ++; 625 626 /* Advance data pointer in the vars structure. */ 627 vars->data += size; 628 629 /* Skip the padding byte if it was not needed. 630 The logic here is that if the string length is odd, 631 then the entire string length, including the null byte, 632 is even and so the extra, padding byte, is not needed. */ 633 if (size & 1) 634 vars->data --; 635 636 /* Create a coff_section_tdata structure for our use. */ 637 sec->used_by_bfd = (struct coff_section_tdata *) vars->data; 638 vars->data += sizeof (struct coff_section_tdata); 639 640 BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size); 641 642 /* Create a symbol to refer to this section. */ 643 pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL); 644 645 /* Cache the index to the symbol in the coff_section_data structure. */ 646 coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1; 647 648 return sec; 649 } 650 651 /* This structure contains the code that goes into the .text section 652 in order to perform a jump into the DLL lookup table. The entries 653 in the table are index by the magic number used to represent the 654 machine type in the PE file. The contents of the data[] arrays in 655 these entries are stolen from the jtab[] arrays in ld/pe-dll.c. 656 The SIZE field says how many bytes in the DATA array are actually 657 used. The OFFSET field says where in the data array the address 658 of the .idata$5 section should be placed. */ 659 #define MAX_TEXT_SECTION_SIZE 32 660 661 typedef struct 662 { 663 unsigned short magic; 664 unsigned char data[MAX_TEXT_SECTION_SIZE]; 665 unsigned int size; 666 unsigned int offset; 667 } 668 jump_table; 669 670 static jump_table jtab[] = 671 { 672 #ifdef I386MAGIC 673 { I386MAGIC, 674 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 675 8, 2 676 }, 677 #endif 678 679 #ifdef AMD64MAGIC 680 { AMD64MAGIC, 681 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 682 8, 2 683 }, 684 #endif 685 686 #ifdef MC68MAGIC 687 { MC68MAGIC, 688 { /* XXX fill me in */ }, 689 0, 0 690 }, 691 #endif 692 693 #ifdef MIPS_ARCH_MAGIC_WINCE 694 { MIPS_ARCH_MAGIC_WINCE, 695 { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, 696 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, 697 16, 0 698 }, 699 #endif 700 701 #ifdef SH_ARCH_MAGIC_WINCE 702 { SH_ARCH_MAGIC_WINCE, 703 { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 704 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 }, 705 12, 8 706 }, 707 #endif 708 709 #ifdef ARMPEMAGIC 710 { ARMPEMAGIC, 711 { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0, 712 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00}, 713 12, 8 714 }, 715 #endif 716 717 #ifdef THUMBPEMAGIC 718 { THUMBPEMAGIC, 719 { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46, 720 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 }, 721 16, 12 722 }, 723 #endif 724 { 0, { 0 }, 0, 0 } 725 }; 726 727 #ifndef NUM_ENTRIES 728 #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0]) 729 #endif 730 731 /* Build a full BFD from the information supplied in a ILF object. */ 732 733 static bfd_boolean 734 pe_ILF_build_a_bfd (bfd * abfd, 735 unsigned int magic, 736 char * symbol_name, 737 char * source_dll, 738 unsigned int ordinal, 739 unsigned int types) 740 { 741 bfd_byte * ptr; 742 pe_ILF_vars vars; 743 struct internal_filehdr internal_f; 744 unsigned int import_type; 745 unsigned int import_name_type; 746 asection_ptr id4, id5, id6 = NULL, text = NULL; 747 coff_symbol_type ** imp_sym; 748 unsigned int imp_index; 749 750 /* Decode and verify the types field of the ILF structure. */ 751 import_type = types & 0x3; 752 import_name_type = (types & 0x1c) >> 2; 753 754 switch (import_type) 755 { 756 case IMPORT_CODE: 757 case IMPORT_DATA: 758 break; 759 760 case IMPORT_CONST: 761 /* XXX code yet to be written. */ 762 _bfd_error_handler (_("%B: Unhandled import type; %x"), 763 abfd, import_type); 764 return FALSE; 765 766 default: 767 _bfd_error_handler (_("%B: Unrecognised import type; %x"), 768 abfd, import_type); 769 return FALSE; 770 } 771 772 switch (import_name_type) 773 { 774 case IMPORT_ORDINAL: 775 case IMPORT_NAME: 776 case IMPORT_NAME_NOPREFIX: 777 case IMPORT_NAME_UNDECORATE: 778 break; 779 780 default: 781 _bfd_error_handler (_("%B: Unrecognised import name type; %x"), 782 abfd, import_name_type); 783 return FALSE; 784 } 785 786 /* Initialise local variables. 787 788 Note these are kept in a structure rather than being 789 declared as statics since bfd frowns on global variables. 790 791 We are going to construct the contents of the BFD in memory, 792 so allocate all the space that we will need right now. */ 793 vars.bim 794 = (struct bfd_in_memory *) bfd_malloc ((bfd_size_type) sizeof (*vars.bim)); 795 if (vars.bim == NULL) 796 return FALSE; 797 798 ptr = (bfd_byte *) bfd_zmalloc ((bfd_size_type) ILF_DATA_SIZE); 799 vars.bim->buffer = ptr; 800 vars.bim->size = ILF_DATA_SIZE; 801 if (ptr == NULL) 802 goto error_return; 803 804 /* Initialise the pointers to regions of the memory and the 805 other contents of the pe_ILF_vars structure as well. */ 806 vars.sym_cache = (coff_symbol_type *) ptr; 807 vars.sym_ptr = (coff_symbol_type *) ptr; 808 vars.sym_index = 0; 809 ptr += SIZEOF_ILF_SYMS; 810 811 vars.sym_table = (unsigned int *) ptr; 812 vars.table_ptr = (unsigned int *) ptr; 813 ptr += SIZEOF_ILF_SYM_TABLE; 814 815 vars.native_syms = (combined_entry_type *) ptr; 816 vars.native_ptr = (combined_entry_type *) ptr; 817 ptr += SIZEOF_ILF_NATIVE_SYMS; 818 819 vars.sym_ptr_table = (coff_symbol_type **) ptr; 820 vars.sym_ptr_ptr = (coff_symbol_type **) ptr; 821 ptr += SIZEOF_ILF_SYM_PTR_TABLE; 822 823 vars.esym_table = (SYMENT *) ptr; 824 vars.esym_ptr = (SYMENT *) ptr; 825 ptr += SIZEOF_ILF_EXT_SYMS; 826 827 vars.reltab = (arelent *) ptr; 828 vars.relcount = 0; 829 ptr += SIZEOF_ILF_RELOCS; 830 831 vars.int_reltab = (struct internal_reloc *) ptr; 832 ptr += SIZEOF_ILF_INT_RELOCS; 833 834 vars.string_table = (char *) ptr; 835 vars.string_ptr = (char *) ptr + STRING_SIZE_SIZE; 836 ptr += SIZEOF_ILF_STRINGS; 837 vars.end_string_ptr = (char *) ptr; 838 839 /* The remaining space in bim->buffer is used 840 by the pe_ILF_make_a_section() function. */ 841 vars.data = ptr; 842 vars.abfd = abfd; 843 vars.sec_index = 0; 844 vars.magic = magic; 845 846 /* Create the initial .idata$<n> sections: 847 [.idata$2: Import Directory Table -- not needed] 848 .idata$4: Import Lookup Table 849 .idata$5: Import Address Table 850 851 Note we do not create a .idata$3 section as this is 852 created for us by the linker script. */ 853 id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0); 854 id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0); 855 if (id4 == NULL || id5 == NULL) 856 goto error_return; 857 858 /* Fill in the contents of these sections. */ 859 if (import_name_type == IMPORT_ORDINAL) 860 { 861 if (ordinal == 0) 862 /* XXX - treat as IMPORT_NAME ??? */ 863 abort (); 864 865 #ifdef COFF_WITH_pex64 866 ((unsigned int *) id4->contents)[0] = ordinal; 867 ((unsigned int *) id4->contents)[1] = 0x80000000; 868 ((unsigned int *) id5->contents)[0] = ordinal; 869 ((unsigned int *) id5->contents)[1] = 0x80000000; 870 #else 871 * (unsigned int *) id4->contents = ordinal | 0x80000000; 872 * (unsigned int *) id5->contents = ordinal | 0x80000000; 873 #endif 874 } 875 else 876 { 877 char * symbol; 878 unsigned int len; 879 880 /* Create .idata$6 - the Hint Name Table. */ 881 id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0); 882 if (id6 == NULL) 883 goto error_return; 884 885 /* If necessary, trim the import symbol name. */ 886 symbol = symbol_name; 887 888 /* As used by MS compiler, '_', '@', and '?' are alternative 889 forms of USER_LABEL_PREFIX, with '?' for c++ mangled names, 890 '@' used for fastcall (in C), '_' everywhere else. Only one 891 of these is used for a symbol. We strip this leading char for 892 IMPORT_NAME_NOPREFIX and IMPORT_NAME_UNDECORATE as per the 893 PE COFF 6.0 spec (section 8.3, Import Name Type). */ 894 895 if (import_name_type != IMPORT_NAME) 896 { 897 char c = symbol[0]; 898 899 /* Check that we don't remove for targets with empty 900 USER_LABEL_PREFIX the leading underscore. */ 901 if ((c == '_' && abfd->xvec->symbol_leading_char != 0) 902 || c == '@' || c == '?') 903 symbol++; 904 } 905 906 len = strlen (symbol); 907 if (import_name_type == IMPORT_NAME_UNDECORATE) 908 { 909 /* Truncate at the first '@'. */ 910 char *at = strchr (symbol, '@'); 911 912 if (at != NULL) 913 len = at - symbol; 914 } 915 916 id6->contents[0] = ordinal & 0xff; 917 id6->contents[1] = ordinal >> 8; 918 919 memcpy ((char *) id6->contents + 2, symbol, len); 920 id6->contents[len + 2] = '\0'; 921 } 922 923 if (import_name_type != IMPORT_ORDINAL) 924 { 925 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 926 pe_ILF_save_relocs (&vars, id4); 927 928 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 929 pe_ILF_save_relocs (&vars, id5); 930 } 931 932 /* Create extra sections depending upon the type of import we are dealing with. */ 933 switch (import_type) 934 { 935 int i; 936 937 case IMPORT_CODE: 938 /* Create a .text section. 939 First we need to look up its contents in the jump table. */ 940 for (i = NUM_ENTRIES (jtab); i--;) 941 { 942 if (jtab[i].size == 0) 943 continue; 944 if (jtab[i].magic == magic) 945 break; 946 } 947 /* If we did not find a matching entry something is wrong. */ 948 if (i < 0) 949 abort (); 950 951 /* Create the .text section. */ 952 text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE); 953 if (text == NULL) 954 goto error_return; 955 956 /* Copy in the jump code. */ 957 memcpy (text->contents, jtab[i].data, jtab[i].size); 958 959 /* Create an import symbol. */ 960 pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0); 961 imp_sym = vars.sym_ptr_ptr - 1; 962 imp_index = vars.sym_index - 1; 963 964 /* Create a reloc for the data in the text section. */ 965 #ifdef MIPS_ARCH_MAGIC_WINCE 966 if (magic == MIPS_ARCH_MAGIC_WINCE) 967 { 968 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S, 969 (struct bfd_symbol **) imp_sym, 970 imp_index); 971 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text); 972 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16, 973 (struct bfd_symbol **) imp_sym, 974 imp_index); 975 } 976 else 977 #endif 978 #ifdef AMD64MAGIC 979 if (magic == AMD64MAGIC) 980 { 981 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 982 BFD_RELOC_32_PCREL, (asymbol **) imp_sym, 983 imp_index); 984 } 985 else 986 #endif 987 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 988 BFD_RELOC_32, (asymbol **) imp_sym, 989 imp_index); 990 991 pe_ILF_save_relocs (& vars, text); 992 break; 993 994 case IMPORT_DATA: 995 break; 996 997 default: 998 /* XXX code not yet written. */ 999 abort (); 1000 } 1001 1002 /* Initialise the bfd. */ 1003 memset (& internal_f, 0, sizeof (internal_f)); 1004 1005 internal_f.f_magic = magic; 1006 internal_f.f_symptr = 0; 1007 internal_f.f_nsyms = 0; 1008 internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */ 1009 1010 if ( ! bfd_set_start_address (abfd, (bfd_vma) 0) 1011 || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f)) 1012 goto error_return; 1013 1014 if (bfd_coff_mkobject_hook (abfd, (void *) & internal_f, NULL) == NULL) 1015 goto error_return; 1016 1017 coff_data (abfd)->pe = 1; 1018 #ifdef THUMBPEMAGIC 1019 if (vars.magic == THUMBPEMAGIC) 1020 /* Stop some linker warnings about thumb code not supporting interworking. */ 1021 coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET; 1022 #endif 1023 1024 /* Switch from file contents to memory contents. */ 1025 bfd_cache_close (abfd); 1026 1027 abfd->iostream = (void *) vars.bim; 1028 abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */; 1029 abfd->iovec = &_bfd_memory_iovec; 1030 abfd->where = 0; 1031 abfd->origin = 0; 1032 obj_sym_filepos (abfd) = 0; 1033 1034 /* Now create a symbol describing the imported value. */ 1035 switch (import_type) 1036 { 1037 case IMPORT_CODE: 1038 pe_ILF_make_a_symbol (& vars, "", symbol_name, text, 1039 BSF_NOT_AT_END | BSF_FUNCTION); 1040 1041 /* Create an import symbol for the DLL, without the 1042 .dll suffix. */ 1043 ptr = (bfd_byte *) strrchr (source_dll, '.'); 1044 if (ptr) 1045 * ptr = 0; 1046 pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0); 1047 if (ptr) 1048 * ptr = '.'; 1049 break; 1050 1051 case IMPORT_DATA: 1052 /* Nothing to do here. */ 1053 break; 1054 1055 default: 1056 /* XXX code not yet written. */ 1057 abort (); 1058 } 1059 1060 /* Point the bfd at the symbol table. */ 1061 obj_symbols (abfd) = vars.sym_cache; 1062 bfd_get_symcount (abfd) = vars.sym_index; 1063 1064 obj_raw_syments (abfd) = vars.native_syms; 1065 obj_raw_syment_count (abfd) = vars.sym_index; 1066 1067 obj_coff_external_syms (abfd) = (void *) vars.esym_table; 1068 obj_coff_keep_syms (abfd) = TRUE; 1069 1070 obj_convert (abfd) = vars.sym_table; 1071 obj_conv_table_size (abfd) = vars.sym_index; 1072 1073 obj_coff_strings (abfd) = vars.string_table; 1074 obj_coff_keep_strings (abfd) = TRUE; 1075 1076 abfd->flags |= HAS_SYMS; 1077 1078 return TRUE; 1079 1080 error_return: 1081 if (vars.bim->buffer != NULL) 1082 free (vars.bim->buffer); 1083 free (vars.bim); 1084 return FALSE; 1085 } 1086 1087 /* We have detected a Image Library Format archive element. 1088 Decode the element and return the appropriate target. */ 1089 1090 static const bfd_target * 1091 pe_ILF_object_p (bfd * abfd) 1092 { 1093 bfd_byte buffer[14]; 1094 bfd_byte * ptr; 1095 char * symbol_name; 1096 char * source_dll; 1097 unsigned int machine; 1098 bfd_size_type size; 1099 unsigned int ordinal; 1100 unsigned int types; 1101 unsigned int magic; 1102 1103 /* Upon entry the first six bytes of the ILF header have 1104 already been read. Now read the rest of the header. */ 1105 if (bfd_bread (buffer, (bfd_size_type) 14, abfd) != 14) 1106 return NULL; 1107 1108 ptr = buffer; 1109 1110 machine = H_GET_16 (abfd, ptr); 1111 ptr += 2; 1112 1113 /* Check that the machine type is recognised. */ 1114 magic = 0; 1115 1116 switch (machine) 1117 { 1118 case IMAGE_FILE_MACHINE_UNKNOWN: 1119 case IMAGE_FILE_MACHINE_ALPHA: 1120 case IMAGE_FILE_MACHINE_ALPHA64: 1121 case IMAGE_FILE_MACHINE_IA64: 1122 break; 1123 1124 case IMAGE_FILE_MACHINE_I386: 1125 #ifdef I386MAGIC 1126 magic = I386MAGIC; 1127 #endif 1128 break; 1129 1130 case IMAGE_FILE_MACHINE_AMD64: 1131 #ifdef AMD64MAGIC 1132 magic = AMD64MAGIC; 1133 #endif 1134 break; 1135 1136 case IMAGE_FILE_MACHINE_M68K: 1137 #ifdef MC68AGIC 1138 magic = MC68MAGIC; 1139 #endif 1140 break; 1141 1142 case IMAGE_FILE_MACHINE_R3000: 1143 case IMAGE_FILE_MACHINE_R4000: 1144 case IMAGE_FILE_MACHINE_R10000: 1145 1146 case IMAGE_FILE_MACHINE_MIPS16: 1147 case IMAGE_FILE_MACHINE_MIPSFPU: 1148 case IMAGE_FILE_MACHINE_MIPSFPU16: 1149 #ifdef MIPS_ARCH_MAGIC_WINCE 1150 magic = MIPS_ARCH_MAGIC_WINCE; 1151 #endif 1152 break; 1153 1154 case IMAGE_FILE_MACHINE_SH3: 1155 case IMAGE_FILE_MACHINE_SH4: 1156 #ifdef SH_ARCH_MAGIC_WINCE 1157 magic = SH_ARCH_MAGIC_WINCE; 1158 #endif 1159 break; 1160 1161 case IMAGE_FILE_MACHINE_ARM: 1162 #ifdef ARMPEMAGIC 1163 magic = ARMPEMAGIC; 1164 #endif 1165 break; 1166 1167 case IMAGE_FILE_MACHINE_THUMB: 1168 #ifdef THUMBPEMAGIC 1169 { 1170 extern const bfd_target TARGET_LITTLE_SYM; 1171 1172 if (abfd->xvec == & TARGET_LITTLE_SYM) 1173 magic = THUMBPEMAGIC; 1174 } 1175 #endif 1176 break; 1177 1178 case IMAGE_FILE_MACHINE_POWERPC: 1179 /* We no longer support PowerPC. */ 1180 default: 1181 _bfd_error_handler 1182 (_("%B: Unrecognised machine type (0x%x)" 1183 " in Import Library Format archive"), 1184 abfd, machine); 1185 bfd_set_error (bfd_error_malformed_archive); 1186 1187 return NULL; 1188 break; 1189 } 1190 1191 if (magic == 0) 1192 { 1193 _bfd_error_handler 1194 (_("%B: Recognised but unhandled machine type (0x%x)" 1195 " in Import Library Format archive"), 1196 abfd, machine); 1197 bfd_set_error (bfd_error_wrong_format); 1198 1199 return NULL; 1200 } 1201 1202 /* We do not bother to check the date. 1203 date = H_GET_32 (abfd, ptr); */ 1204 ptr += 4; 1205 1206 size = H_GET_32 (abfd, ptr); 1207 ptr += 4; 1208 1209 if (size == 0) 1210 { 1211 _bfd_error_handler 1212 (_("%B: size field is zero in Import Library Format header"), abfd); 1213 bfd_set_error (bfd_error_malformed_archive); 1214 1215 return NULL; 1216 } 1217 1218 ordinal = H_GET_16 (abfd, ptr); 1219 ptr += 2; 1220 1221 types = H_GET_16 (abfd, ptr); 1222 /* ptr += 2; */ 1223 1224 /* Now read in the two strings that follow. */ 1225 ptr = (bfd_byte *) bfd_alloc (abfd, size); 1226 if (ptr == NULL) 1227 return NULL; 1228 1229 if (bfd_bread (ptr, size, abfd) != size) 1230 { 1231 bfd_release (abfd, ptr); 1232 return NULL; 1233 } 1234 1235 symbol_name = (char *) ptr; 1236 source_dll = symbol_name + strlen (symbol_name) + 1; 1237 1238 /* Verify that the strings are null terminated. */ 1239 if (ptr[size - 1] != 0 1240 || (bfd_size_type) ((bfd_byte *) source_dll - ptr) >= size) 1241 { 1242 _bfd_error_handler 1243 (_("%B: string not null terminated in ILF object file."), abfd); 1244 bfd_set_error (bfd_error_malformed_archive); 1245 bfd_release (abfd, ptr); 1246 return NULL; 1247 } 1248 1249 /* Now construct the bfd. */ 1250 if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name, 1251 source_dll, ordinal, types)) 1252 { 1253 bfd_release (abfd, ptr); 1254 return NULL; 1255 } 1256 1257 return abfd->xvec; 1258 } 1259 1260 static void 1261 pe_bfd_read_buildid(bfd *abfd) 1262 { 1263 pe_data_type *pe = pe_data (abfd); 1264 struct internal_extra_pe_aouthdr *extra = &pe->pe_opthdr; 1265 asection *section; 1266 bfd_byte *data = 0; 1267 bfd_size_type dataoff; 1268 unsigned int i; 1269 1270 bfd_vma addr = extra->DataDirectory[PE_DEBUG_DATA].VirtualAddress; 1271 bfd_size_type size = extra->DataDirectory[PE_DEBUG_DATA].Size; 1272 1273 if (size == 0) 1274 return; 1275 1276 addr += extra->ImageBase; 1277 1278 /* Search for the section containing the DebugDirectory */ 1279 for (section = abfd->sections; section != NULL; section = section->next) 1280 { 1281 if ((addr >= section->vma) && (addr < (section->vma + section->size))) 1282 break; 1283 } 1284 1285 if (section == NULL) 1286 { 1287 return; 1288 } 1289 else if (!(section->flags & SEC_HAS_CONTENTS)) 1290 { 1291 return; 1292 } 1293 1294 dataoff = addr - section->vma; 1295 1296 /* Read the whole section. */ 1297 if (!bfd_malloc_and_get_section (abfd, section, &data)) 1298 { 1299 if (data != NULL) 1300 free (data); 1301 return; 1302 } 1303 1304 /* Search for a CodeView entry in the DebugDirectory */ 1305 for (i = 0; i < size / sizeof (struct external_IMAGE_DEBUG_DIRECTORY); i++) 1306 { 1307 struct external_IMAGE_DEBUG_DIRECTORY *ext 1308 = &((struct external_IMAGE_DEBUG_DIRECTORY *)(data + dataoff))[i]; 1309 struct internal_IMAGE_DEBUG_DIRECTORY idd; 1310 1311 _bfd_XXi_swap_debugdir_in (abfd, ext, &idd); 1312 1313 if (idd.Type == PE_IMAGE_DEBUG_TYPE_CODEVIEW) 1314 { 1315 char buffer[256 + 1]; 1316 CODEVIEW_INFO *cvinfo = (CODEVIEW_INFO *) buffer; 1317 1318 /* 1319 The debug entry doesn't have to have to be in a section, in which 1320 case AddressOfRawData is 0, so always use PointerToRawData. 1321 */ 1322 if (_bfd_XXi_slurp_codeview_record (abfd, 1323 (file_ptr) idd.PointerToRawData, 1324 idd.SizeOfData, cvinfo)) 1325 { 1326 struct bfd_build_id* build_id = bfd_alloc(abfd, 1327 sizeof(struct bfd_build_id) + cvinfo->SignatureLength); 1328 if (build_id) 1329 { 1330 build_id->size = cvinfo->SignatureLength; 1331 memcpy(build_id->data, cvinfo->Signature, 1332 cvinfo->SignatureLength); 1333 abfd->build_id = build_id; 1334 } 1335 } 1336 break; 1337 } 1338 } 1339 } 1340 1341 static const bfd_target * 1342 pe_bfd_object_p (bfd * abfd) 1343 { 1344 bfd_byte buffer[6]; 1345 struct external_PEI_DOS_hdr dos_hdr; 1346 struct external_PEI_IMAGE_hdr image_hdr; 1347 struct internal_filehdr internal_f; 1348 struct internal_aouthdr internal_a; 1349 file_ptr opt_hdr_size; 1350 file_ptr offset; 1351 const bfd_target *result; 1352 1353 /* Detect if this a Microsoft Import Library Format element. */ 1354 /* First read the beginning of the header. */ 1355 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1356 || bfd_bread (buffer, (bfd_size_type) 6, abfd) != 6) 1357 { 1358 if (bfd_get_error () != bfd_error_system_call) 1359 bfd_set_error (bfd_error_wrong_format); 1360 return NULL; 1361 } 1362 1363 /* Then check the magic and the version (only 0 is supported). */ 1364 if (H_GET_32 (abfd, buffer) == 0xffff0000 1365 && H_GET_16 (abfd, buffer + 4) == 0) 1366 return pe_ILF_object_p (abfd); 1367 1368 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1369 || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd) 1370 != sizeof (dos_hdr)) 1371 { 1372 if (bfd_get_error () != bfd_error_system_call) 1373 bfd_set_error (bfd_error_wrong_format); 1374 return NULL; 1375 } 1376 1377 /* There are really two magic numbers involved; the magic number 1378 that says this is a NT executable (PEI) and the magic number that 1379 determines the architecture. The former is DOSMAGIC, stored in 1380 the e_magic field. The latter is stored in the f_magic field. 1381 If the NT magic number isn't valid, the architecture magic number 1382 could be mimicked by some other field (specifically, the number 1383 of relocs in section 3). Since this routine can only be called 1384 correctly for a PEI file, check the e_magic number here, and, if 1385 it doesn't match, clobber the f_magic number so that we don't get 1386 a false match. */ 1387 if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC) 1388 { 1389 bfd_set_error (bfd_error_wrong_format); 1390 return NULL; 1391 } 1392 1393 offset = H_GET_32 (abfd, dos_hdr.e_lfanew); 1394 if (bfd_seek (abfd, offset, SEEK_SET) != 0 1395 || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd) 1396 != sizeof (image_hdr))) 1397 { 1398 if (bfd_get_error () != bfd_error_system_call) 1399 bfd_set_error (bfd_error_wrong_format); 1400 return NULL; 1401 } 1402 1403 if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550) 1404 { 1405 bfd_set_error (bfd_error_wrong_format); 1406 return NULL; 1407 } 1408 1409 /* Swap file header, so that we get the location for calling 1410 real_object_p. */ 1411 bfd_coff_swap_filehdr_in (abfd, &image_hdr, &internal_f); 1412 1413 if (! bfd_coff_bad_format_hook (abfd, &internal_f) 1414 || internal_f.f_opthdr > bfd_coff_aoutsz (abfd)) 1415 { 1416 bfd_set_error (bfd_error_wrong_format); 1417 return NULL; 1418 } 1419 1420 /* Read the optional header, which has variable size. */ 1421 opt_hdr_size = internal_f.f_opthdr; 1422 1423 if (opt_hdr_size != 0) 1424 { 1425 bfd_size_type amt = opt_hdr_size; 1426 void * opthdr; 1427 1428 /* PR 17521 file: 230-131433-0.004. */ 1429 if (amt < sizeof (PEAOUTHDR)) 1430 amt = sizeof (PEAOUTHDR); 1431 1432 opthdr = bfd_zalloc (abfd, amt); 1433 if (opthdr == NULL) 1434 return NULL; 1435 if (bfd_bread (opthdr, opt_hdr_size, abfd) 1436 != (bfd_size_type) opt_hdr_size) 1437 return NULL; 1438 1439 bfd_set_error (bfd_error_no_error); 1440 bfd_coff_swap_aouthdr_in (abfd, opthdr, & internal_a); 1441 if (bfd_get_error () != bfd_error_no_error) 1442 return NULL; 1443 } 1444 1445 1446 result = coff_real_object_p (abfd, internal_f.f_nscns, &internal_f, 1447 (opt_hdr_size != 0 1448 ? &internal_a 1449 : (struct internal_aouthdr *) NULL)); 1450 1451 1452 if (result) 1453 { 1454 /* Now the whole header has been processed, see if there is a build-id */ 1455 pe_bfd_read_buildid(abfd); 1456 } 1457 1458 return result; 1459 } 1460 1461 #define coff_object_p pe_bfd_object_p 1462 #endif /* COFF_IMAGE_WITH_PE */ 1463
Indexes created Sat Feb 28 05:31:39 UTC 2026