1 /* Support for the generic parts of PE/PEI, for BFD. 2 Copyright (C) 1995-2020 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@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 129 static void 130 coff_swap_reloc_in (bfd * abfd, void * src, void * dst) 131 { 132 RELOC *reloc_src = (RELOC *) src; 133 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; 134 135 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); 136 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); 137 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); 138 #ifdef SWAP_IN_RELOC_OFFSET 139 reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset); 140 #endif 141 } 142 143 static unsigned int 144 coff_swap_reloc_out (bfd * abfd, void * src, void * dst) 145 { 146 struct internal_reloc *reloc_src = (struct internal_reloc *) src; 147 struct external_reloc *reloc_dst = (struct external_reloc *) dst; 148 149 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); 150 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); 151 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); 152 153 #ifdef SWAP_OUT_RELOC_OFFSET 154 SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset); 155 #endif 156 #ifdef SWAP_OUT_RELOC_EXTRA 157 SWAP_OUT_RELOC_EXTRA (abfd, reloc_src, reloc_dst); 158 #endif 159 return RELSZ; 160 } 161 #endif /* not NO_COFF_RELOCS */ 162 163 #ifdef COFF_IMAGE_WITH_PE 164 #undef FILHDR 165 #define FILHDR struct external_PEI_IMAGE_hdr 166 #endif 167 168 static void 169 coff_swap_filehdr_in (bfd * abfd, void * src, void * dst) 170 { 171 FILHDR *filehdr_src = (FILHDR *) src; 172 struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst; 173 174 filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic); 175 filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src->f_nscns); 176 filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->f_timdat); 177 filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src->f_nsyms); 178 filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src->f_flags); 179 filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr); 180 181 /* Other people's tools sometimes generate headers with an nsyms but 182 a zero symptr. */ 183 if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0) 184 { 185 filehdr_dst->f_nsyms = 0; 186 filehdr_dst->f_flags |= F_LSYMS; 187 } 188 189 filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr); 190 } 191 192 #ifdef COFF_IMAGE_WITH_PE 193 # define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out 194 #elif defined COFF_WITH_pex64 195 # define coff_swap_filehdr_out _bfd_pex64_only_swap_filehdr_out 196 #elif defined COFF_WITH_pep 197 # define coff_swap_filehdr_out _bfd_pep_only_swap_filehdr_out 198 #else 199 # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out 200 #endif 201 202 static void 203 coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in) 204 { 205 SCNHDR *scnhdr_ext = (SCNHDR *) ext; 206 struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in; 207 208 memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name)); 209 210 scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr); 211 scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr); 212 scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size); 213 scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr); 214 scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr); 215 scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr); 216 scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags); 217 218 /* MS handles overflow of line numbers by carrying into the reloc 219 field (it appears). Since it's supposed to be zero for PE 220 *IMAGE* format, that's safe. This is still a bit iffy. */ 221 #ifdef COFF_IMAGE_WITH_PE 222 scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno) 223 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16)); 224 scnhdr_int->s_nreloc = 0; 225 #else 226 scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc); 227 scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno); 228 #endif 229 230 if (scnhdr_int->s_vaddr != 0) 231 { 232 scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase; 233 /* Do not cut upper 32-bits for 64-bit vma. */ 234 #ifndef COFF_WITH_pex64 235 scnhdr_int->s_vaddr &= 0xffffffff; 236 #endif 237 } 238 239 #ifndef COFF_NO_HACK_SCNHDR_SIZE 240 /* If this section holds uninitialized data and is from an object file 241 or from an executable image that has not initialized the field, 242 or if the image is an executable file and the physical size is padded, 243 use the virtual size (stored in s_paddr) instead. */ 244 if (scnhdr_int->s_paddr > 0 245 && (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 246 && (! bfd_pei_p (abfd) || scnhdr_int->s_size == 0)) 247 || (bfd_pei_p (abfd) && (scnhdr_int->s_size > scnhdr_int->s_paddr)))) 248 /* This code used to set scnhdr_int->s_paddr to 0. However, 249 coff_set_alignment_hook stores s_paddr in virt_size, which 250 only works if it correctly holds the virtual size of the 251 section. */ 252 scnhdr_int->s_size = scnhdr_int->s_paddr; 253 #endif 254 } 255 256 static bfd_boolean 257 pe_mkobject (bfd * abfd) 258 { 259 pe_data_type *pe; 260 bfd_size_type amt = sizeof (pe_data_type); 261 262 abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt); 263 264 if (abfd->tdata.pe_obj_data == 0) 265 return FALSE; 266 267 pe = pe_data (abfd); 268 269 pe->coff.pe = 1; 270 271 /* in_reloc_p is architecture dependent. */ 272 pe->in_reloc_p = in_reloc_p; 273 274 /* Default DOS message string. */ 275 pe->dos_message[0] = 0x0eba1f0e; 276 pe->dos_message[1] = 0xcd09b400; 277 pe->dos_message[2] = 0x4c01b821; 278 pe->dos_message[3] = 0x685421cd; 279 pe->dos_message[4] = 0x70207369; 280 pe->dos_message[5] = 0x72676f72; 281 pe->dos_message[6] = 0x63206d61; 282 pe->dos_message[7] = 0x6f6e6e61; 283 pe->dos_message[8] = 0x65622074; 284 pe->dos_message[9] = 0x6e757220; 285 pe->dos_message[10] = 0x206e6920; 286 pe->dos_message[11] = 0x20534f44; 287 pe->dos_message[12] = 0x65646f6d; 288 pe->dos_message[13] = 0x0a0d0d2e; 289 pe->dos_message[14] = 0x24; 290 pe->dos_message[15] = 0x0; 291 292 memset (& pe->pe_opthdr, 0, sizeof pe->pe_opthdr); 293 return TRUE; 294 } 295 296 /* Create the COFF backend specific information. */ 297 298 static void * 299 pe_mkobject_hook (bfd * abfd, 300 void * filehdr, 301 void * aouthdr ATTRIBUTE_UNUSED) 302 { 303 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; 304 pe_data_type *pe; 305 306 if (! pe_mkobject (abfd)) 307 return NULL; 308 309 pe = pe_data (abfd); 310 pe->coff.sym_filepos = internal_f->f_symptr; 311 /* These members communicate important constants about the symbol 312 table to GDB's symbol-reading code. These `constants' 313 unfortunately vary among coff implementations... */ 314 pe->coff.local_n_btmask = N_BTMASK; 315 pe->coff.local_n_btshft = N_BTSHFT; 316 pe->coff.local_n_tmask = N_TMASK; 317 pe->coff.local_n_tshift = N_TSHIFT; 318 pe->coff.local_symesz = SYMESZ; 319 pe->coff.local_auxesz = AUXESZ; 320 pe->coff.local_linesz = LINESZ; 321 322 pe->coff.timestamp = internal_f->f_timdat; 323 324 obj_raw_syment_count (abfd) = 325 obj_conv_table_size (abfd) = 326 internal_f->f_nsyms; 327 328 pe->real_flags = internal_f->f_flags; 329 330 if ((internal_f->f_flags & F_DLL) != 0) 331 pe->dll = 1; 332 333 if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) 334 abfd->flags |= HAS_DEBUG; 335 336 #ifdef COFF_IMAGE_WITH_PE 337 if (aouthdr) 338 pe->pe_opthdr = ((struct internal_aouthdr *) aouthdr)->pe; 339 #endif 340 341 #ifdef ARM 342 if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) 343 coff_data (abfd) ->flags = 0; 344 #endif 345 346 memcpy (pe->dos_message, internal_f->pe.dos_message, 347 sizeof (pe->dos_message)); 348 349 return (void *) pe; 350 } 351 352 static bfd_boolean 353 pe_print_private_bfd_data (bfd *abfd, void * vfile) 354 { 355 FILE *file = (FILE *) vfile; 356 357 if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile)) 358 return FALSE; 359 360 if (pe_saved_coff_bfd_print_private_bfd_data == NULL) 361 return TRUE; 362 363 fputc ('\n', file); 364 365 return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile); 366 } 367 368 /* Copy any private info we understand from the input bfd 369 to the output bfd. */ 370 371 static bfd_boolean 372 pe_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 373 { 374 /* PR binutils/716: Copy the large address aware flag. 375 XXX: Should we be copying other flags or other fields in the pe_data() 376 structure ? */ 377 if (pe_data (obfd) != NULL 378 && pe_data (ibfd) != NULL 379 && pe_data (ibfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE) 380 pe_data (obfd)->real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE; 381 382 if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd)) 383 return FALSE; 384 385 if (pe_saved_coff_bfd_copy_private_bfd_data) 386 return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd); 387 388 return TRUE; 389 } 390 391 #define coff_bfd_copy_private_section_data \ 392 _bfd_XX_bfd_copy_private_section_data 393 394 #define coff_get_symbol_info _bfd_XX_get_symbol_info 395 396 #ifdef COFF_IMAGE_WITH_PE 397 398 /* Code to handle Microsoft's Image Library Format. 399 Also known as LINK6 format. 400 Documentation about this format can be found at: 401 402 http://msdn.microsoft.com/library/specs/pecoff_section8.htm */ 403 404 /* The following constants specify the sizes of the various data 405 structures that we have to create in order to build a bfd describing 406 an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6 407 and SIZEOF_IDATA7 below is to allow for the possibility that we might 408 need a padding byte in order to ensure 16 bit alignment for the section's 409 contents. 410 411 The value for SIZEOF_ILF_STRINGS is computed as follows: 412 413 There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters 414 per symbol for their names (longest section name is .idata$x). 415 416 There will be two symbols for the imported value, one the symbol name 417 and one with _imp__ prefixed. Allowing for the terminating nul's this 418 is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll). 419 420 The strings in the string table must start STRING__SIZE_SIZE bytes into 421 the table in order to for the string lookup code in coffgen/coffcode to 422 work. */ 423 #define NUM_ILF_RELOCS 8 424 #define NUM_ILF_SECTIONS 6 425 #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS) 426 427 #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache)) 428 #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table)) 429 #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms)) 430 #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table)) 431 #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table)) 432 #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab)) 433 #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab)) 434 #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \ 435 + 21 + strlen (source_dll) \ 436 + NUM_ILF_SECTIONS * 9 \ 437 + STRING_SIZE_SIZE) 438 #define SIZEOF_IDATA2 (5 * 4) 439 440 /* For PEx64 idata4 & 5 have thumb size of 8 bytes. */ 441 #ifdef COFF_WITH_pex64 442 #define SIZEOF_IDATA4 (2 * 4) 443 #define SIZEOF_IDATA5 (2 * 4) 444 #else 445 #define SIZEOF_IDATA4 (1 * 4) 446 #define SIZEOF_IDATA5 (1 * 4) 447 #endif 448 449 #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1) 450 #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1) 451 #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata)) 452 453 #define ILF_DATA_SIZE \ 454 + SIZEOF_ILF_SYMS \ 455 + SIZEOF_ILF_SYM_TABLE \ 456 + SIZEOF_ILF_NATIVE_SYMS \ 457 + SIZEOF_ILF_SYM_PTR_TABLE \ 458 + SIZEOF_ILF_EXT_SYMS \ 459 + SIZEOF_ILF_RELOCS \ 460 + SIZEOF_ILF_INT_RELOCS \ 461 + SIZEOF_ILF_STRINGS \ 462 + SIZEOF_IDATA2 \ 463 + SIZEOF_IDATA4 \ 464 + SIZEOF_IDATA5 \ 465 + SIZEOF_IDATA6 \ 466 + SIZEOF_IDATA7 \ 467 + SIZEOF_ILF_SECTIONS \ 468 + MAX_TEXT_SECTION_SIZE 469 470 /* Create an empty relocation against the given symbol. */ 471 472 static void 473 pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars, 474 bfd_vma address, 475 bfd_reloc_code_real_type reloc, 476 struct bfd_symbol ** sym, 477 unsigned int sym_index) 478 { 479 arelent * entry; 480 struct internal_reloc * internal; 481 482 entry = vars->reltab + vars->relcount; 483 internal = vars->int_reltab + vars->relcount; 484 485 entry->address = address; 486 entry->addend = 0; 487 entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc); 488 entry->sym_ptr_ptr = sym; 489 490 internal->r_vaddr = address; 491 internal->r_symndx = sym_index; 492 internal->r_type = entry->howto->type; 493 494 vars->relcount ++; 495 496 BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS); 497 } 498 499 /* Create an empty relocation against the given section. */ 500 501 static void 502 pe_ILF_make_a_reloc (pe_ILF_vars * vars, 503 bfd_vma address, 504 bfd_reloc_code_real_type reloc, 505 asection_ptr sec) 506 { 507 pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr, 508 coff_section_data (vars->abfd, sec)->i); 509 } 510 511 /* Move the queued relocs into the given section. */ 512 513 static void 514 pe_ILF_save_relocs (pe_ILF_vars * vars, 515 asection_ptr sec) 516 { 517 /* Make sure that there is somewhere to store the internal relocs. */ 518 if (coff_section_data (vars->abfd, sec) == NULL) 519 /* We should probably return an error indication here. */ 520 abort (); 521 522 coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab; 523 coff_section_data (vars->abfd, sec)->keep_relocs = TRUE; 524 525 sec->relocation = vars->reltab; 526 sec->reloc_count = vars->relcount; 527 sec->flags |= SEC_RELOC; 528 529 vars->reltab += vars->relcount; 530 vars->int_reltab += vars->relcount; 531 vars->relcount = 0; 532 533 BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table); 534 } 535 536 /* Create a global symbol and add it to the relevant tables. */ 537 538 static void 539 pe_ILF_make_a_symbol (pe_ILF_vars * vars, 540 const char * prefix, 541 const char * symbol_name, 542 asection_ptr section, 543 flagword extra_flags) 544 { 545 coff_symbol_type * sym; 546 combined_entry_type * ent; 547 SYMENT * esym; 548 unsigned short sclass; 549 550 if (extra_flags & BSF_LOCAL) 551 sclass = C_STAT; 552 else 553 sclass = C_EXT; 554 555 #ifdef THUMBPEMAGIC 556 if (vars->magic == THUMBPEMAGIC) 557 { 558 if (extra_flags & BSF_FUNCTION) 559 sclass = C_THUMBEXTFUNC; 560 else if (extra_flags & BSF_LOCAL) 561 sclass = C_THUMBSTAT; 562 else 563 sclass = C_THUMBEXT; 564 } 565 #endif 566 567 BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS); 568 569 sym = vars->sym_ptr; 570 ent = vars->native_ptr; 571 esym = vars->esym_ptr; 572 573 /* Copy the symbol's name into the string table. */ 574 sprintf (vars->string_ptr, "%s%s", prefix, symbol_name); 575 576 if (section == NULL) 577 section = bfd_und_section_ptr; 578 579 /* Initialise the external symbol. */ 580 H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table, 581 esym->e.e.e_offset); 582 H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum); 583 esym->e_sclass[0] = sclass; 584 585 /* The following initialisations are unnecessary - the memory is 586 zero initialised. They are just kept here as reminders. */ 587 588 /* Initialise the internal symbol structure. */ 589 ent->u.syment.n_sclass = sclass; 590 ent->u.syment.n_scnum = section->target_index; 591 ent->u.syment._n._n_n._n_offset = (bfd_hostptr_t) sym; 592 ent->is_sym = TRUE; 593 594 sym->symbol.the_bfd = vars->abfd; 595 sym->symbol.name = vars->string_ptr; 596 sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags; 597 sym->symbol.section = section; 598 sym->native = ent; 599 600 * vars->table_ptr = vars->sym_index; 601 * vars->sym_ptr_ptr = sym; 602 603 /* Adjust pointers for the next symbol. */ 604 vars->sym_index ++; 605 vars->sym_ptr ++; 606 vars->sym_ptr_ptr ++; 607 vars->table_ptr ++; 608 vars->native_ptr ++; 609 vars->esym_ptr ++; 610 vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1; 611 612 BFD_ASSERT (vars->string_ptr < vars->end_string_ptr); 613 } 614 615 /* Create a section. */ 616 617 static asection_ptr 618 pe_ILF_make_a_section (pe_ILF_vars * vars, 619 const char * name, 620 unsigned int size, 621 flagword extra_flags) 622 { 623 asection_ptr sec; 624 flagword flags; 625 626 sec = bfd_make_section_old_way (vars->abfd, name); 627 if (sec == NULL) 628 return NULL; 629 630 flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY; 631 632 bfd_set_section_flags (sec, flags | extra_flags); 633 634 bfd_set_section_alignment (sec, 2); 635 636 /* Check that we will not run out of space. */ 637 BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size); 638 639 /* Set the section size and contents. The actual 640 contents are filled in by our parent. */ 641 bfd_set_section_size (sec, (bfd_size_type) size); 642 sec->contents = vars->data; 643 sec->target_index = vars->sec_index ++; 644 645 /* Advance data pointer in the vars structure. */ 646 vars->data += size; 647 648 /* Skip the padding byte if it was not needed. 649 The logic here is that if the string length is odd, 650 then the entire string length, including the null byte, 651 is even and so the extra, padding byte, is not needed. */ 652 if (size & 1) 653 vars->data --; 654 655 # if (GCC_VERSION >= 3000) 656 /* PR 18758: See note in pe_ILF_buid_a_bfd. We must make sure that we 657 preserve host alignment requirements. We test 'size' rather than 658 vars.data as we cannot perform binary arithmetic on pointers. We assume 659 that vars.data was sufficiently aligned upon entry to this function. 660 The BFD_ASSERTs in this functions will warn us if we run out of room, 661 but we should already have enough padding built in to ILF_DATA_SIZE. */ 662 { 663 unsigned int alignment = __alignof__ (struct coff_section_tdata); 664 665 if (size & (alignment - 1)) 666 vars->data += alignment - (size & (alignment - 1)); 667 } 668 #endif 669 /* Create a coff_section_tdata structure for our use. */ 670 sec->used_by_bfd = (struct coff_section_tdata *) vars->data; 671 vars->data += sizeof (struct coff_section_tdata); 672 673 BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size); 674 675 /* Create a symbol to refer to this section. */ 676 pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL); 677 678 /* Cache the index to the symbol in the coff_section_data structure. */ 679 coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1; 680 681 return sec; 682 } 683 684 /* This structure contains the code that goes into the .text section 685 in order to perform a jump into the DLL lookup table. The entries 686 in the table are index by the magic number used to represent the 687 machine type in the PE file. The contents of the data[] arrays in 688 these entries are stolen from the jtab[] arrays in ld/pe-dll.c. 689 The SIZE field says how many bytes in the DATA array are actually 690 used. The OFFSET field says where in the data array the address 691 of the .idata$5 section should be placed. */ 692 #define MAX_TEXT_SECTION_SIZE 32 693 694 typedef struct 695 { 696 unsigned short magic; 697 unsigned char data[MAX_TEXT_SECTION_SIZE]; 698 unsigned int size; 699 unsigned int offset; 700 } 701 jump_table; 702 703 static jump_table jtab[] = 704 { 705 #ifdef I386MAGIC 706 { I386MAGIC, 707 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 708 8, 2 709 }, 710 #endif 711 712 #ifdef AMD64MAGIC 713 { AMD64MAGIC, 714 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 715 8, 2 716 }, 717 #endif 718 719 #ifdef MC68MAGIC 720 { MC68MAGIC, 721 { /* XXX fill me in */ }, 722 0, 0 723 }, 724 #endif 725 726 #ifdef MIPS_ARCH_MAGIC_WINCE 727 { MIPS_ARCH_MAGIC_WINCE, 728 { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, 729 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, 730 16, 0 731 }, 732 #endif 733 734 #ifdef SH_ARCH_MAGIC_WINCE 735 { SH_ARCH_MAGIC_WINCE, 736 { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 737 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 }, 738 12, 8 739 }, 740 #endif 741 742 #ifdef ARMPEMAGIC 743 { ARMPEMAGIC, 744 { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0, 745 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00}, 746 12, 8 747 }, 748 #endif 749 750 #ifdef THUMBPEMAGIC 751 { THUMBPEMAGIC, 752 { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46, 753 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 }, 754 16, 12 755 }, 756 #endif 757 { 0, { 0 }, 0, 0 } 758 }; 759 760 #ifndef NUM_ENTRIES 761 #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0]) 762 #endif 763 764 /* Build a full BFD from the information supplied in a ILF object. */ 765 766 static bfd_boolean 767 pe_ILF_build_a_bfd (bfd * abfd, 768 unsigned int magic, 769 char * symbol_name, 770 char * source_dll, 771 unsigned int ordinal, 772 unsigned int types) 773 { 774 bfd_byte * ptr; 775 pe_ILF_vars vars; 776 struct internal_filehdr internal_f; 777 unsigned int import_type; 778 unsigned int import_name_type; 779 asection_ptr id4, id5, id6 = NULL, text = NULL; 780 coff_symbol_type ** imp_sym; 781 unsigned int imp_index; 782 783 /* Decode and verify the types field of the ILF structure. */ 784 import_type = types & 0x3; 785 import_name_type = (types & 0x1c) >> 2; 786 787 switch (import_type) 788 { 789 case IMPORT_CODE: 790 case IMPORT_DATA: 791 break; 792 793 case IMPORT_CONST: 794 /* XXX code yet to be written. */ 795 /* xgettext:c-format */ 796 _bfd_error_handler (_("%pB: unhandled import type; %x"), 797 abfd, import_type); 798 return FALSE; 799 800 default: 801 /* xgettext:c-format */ 802 _bfd_error_handler (_("%pB: unrecognized import type; %x"), 803 abfd, import_type); 804 return FALSE; 805 } 806 807 switch (import_name_type) 808 { 809 case IMPORT_ORDINAL: 810 case IMPORT_NAME: 811 case IMPORT_NAME_NOPREFIX: 812 case IMPORT_NAME_UNDECORATE: 813 break; 814 815 default: 816 /* xgettext:c-format */ 817 _bfd_error_handler (_("%pB: unrecognized import name type; %x"), 818 abfd, import_name_type); 819 return FALSE; 820 } 821 822 /* Initialise local variables. 823 824 Note these are kept in a structure rather than being 825 declared as statics since bfd frowns on global variables. 826 827 We are going to construct the contents of the BFD in memory, 828 so allocate all the space that we will need right now. */ 829 vars.bim 830 = (struct bfd_in_memory *) bfd_malloc ((bfd_size_type) sizeof (*vars.bim)); 831 if (vars.bim == NULL) 832 return FALSE; 833 834 ptr = (bfd_byte *) bfd_zmalloc ((bfd_size_type) ILF_DATA_SIZE); 835 vars.bim->buffer = ptr; 836 vars.bim->size = ILF_DATA_SIZE; 837 if (ptr == NULL) 838 goto error_return; 839 840 /* Initialise the pointers to regions of the memory and the 841 other contents of the pe_ILF_vars structure as well. */ 842 vars.sym_cache = (coff_symbol_type *) ptr; 843 vars.sym_ptr = (coff_symbol_type *) ptr; 844 vars.sym_index = 0; 845 ptr += SIZEOF_ILF_SYMS; 846 847 vars.sym_table = (unsigned int *) ptr; 848 vars.table_ptr = (unsigned int *) ptr; 849 ptr += SIZEOF_ILF_SYM_TABLE; 850 851 vars.native_syms = (combined_entry_type *) ptr; 852 vars.native_ptr = (combined_entry_type *) ptr; 853 ptr += SIZEOF_ILF_NATIVE_SYMS; 854 855 vars.sym_ptr_table = (coff_symbol_type **) ptr; 856 vars.sym_ptr_ptr = (coff_symbol_type **) ptr; 857 ptr += SIZEOF_ILF_SYM_PTR_TABLE; 858 859 vars.esym_table = (SYMENT *) ptr; 860 vars.esym_ptr = (SYMENT *) ptr; 861 ptr += SIZEOF_ILF_EXT_SYMS; 862 863 vars.reltab = (arelent *) ptr; 864 vars.relcount = 0; 865 ptr += SIZEOF_ILF_RELOCS; 866 867 vars.int_reltab = (struct internal_reloc *) ptr; 868 ptr += SIZEOF_ILF_INT_RELOCS; 869 870 vars.string_table = (char *) ptr; 871 vars.string_ptr = (char *) ptr + STRING_SIZE_SIZE; 872 ptr += SIZEOF_ILF_STRINGS; 873 vars.end_string_ptr = (char *) ptr; 874 875 /* The remaining space in bim->buffer is used 876 by the pe_ILF_make_a_section() function. */ 877 # if (GCC_VERSION >= 3000) 878 /* PR 18758: Make sure that the data area is sufficiently aligned for 879 pointers on the host. __alignof__ is a gcc extension, hence the test 880 above. For other compilers we will have to assume that the alignment is 881 unimportant, or else extra code can be added here and in 882 pe_ILF_make_a_section. 883 884 Note - we cannot test 'ptr' directly as it is illegal to perform binary 885 arithmetic on pointers, but we know that the strings section is the only 886 one that might end on an unaligned boundary. */ 887 { 888 unsigned int alignment = __alignof__ (char *); 889 890 if (SIZEOF_ILF_STRINGS & (alignment - 1)) 891 ptr += alignment - (SIZEOF_ILF_STRINGS & (alignment - 1)); 892 } 893 #endif 894 895 vars.data = ptr; 896 vars.abfd = abfd; 897 vars.sec_index = 0; 898 vars.magic = magic; 899 900 /* Create the initial .idata$<n> sections: 901 [.idata$2: Import Directory Table -- not needed] 902 .idata$4: Import Lookup Table 903 .idata$5: Import Address Table 904 905 Note we do not create a .idata$3 section as this is 906 created for us by the linker script. */ 907 id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0); 908 id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0); 909 if (id4 == NULL || id5 == NULL) 910 goto error_return; 911 912 /* Fill in the contents of these sections. */ 913 if (import_name_type == IMPORT_ORDINAL) 914 { 915 if (ordinal == 0) 916 /* See PR 20907 for a reproducer. */ 917 goto error_return; 918 919 #ifdef COFF_WITH_pex64 920 ((unsigned int *) id4->contents)[0] = ordinal; 921 ((unsigned int *) id4->contents)[1] = 0x80000000; 922 ((unsigned int *) id5->contents)[0] = ordinal; 923 ((unsigned int *) id5->contents)[1] = 0x80000000; 924 #else 925 * (unsigned int *) id4->contents = ordinal | 0x80000000; 926 * (unsigned int *) id5->contents = ordinal | 0x80000000; 927 #endif 928 } 929 else 930 { 931 char * symbol; 932 unsigned int len; 933 934 /* Create .idata$6 - the Hint Name Table. */ 935 id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0); 936 if (id6 == NULL) 937 goto error_return; 938 939 /* If necessary, trim the import symbol name. */ 940 symbol = symbol_name; 941 942 /* As used by MS compiler, '_', '@', and '?' are alternative 943 forms of USER_LABEL_PREFIX, with '?' for c++ mangled names, 944 '@' used for fastcall (in C), '_' everywhere else. Only one 945 of these is used for a symbol. We strip this leading char for 946 IMPORT_NAME_NOPREFIX and IMPORT_NAME_UNDECORATE as per the 947 PE COFF 6.0 spec (section 8.3, Import Name Type). */ 948 949 if (import_name_type != IMPORT_NAME) 950 { 951 char c = symbol[0]; 952 953 /* Check that we don't remove for targets with empty 954 USER_LABEL_PREFIX the leading underscore. */ 955 if ((c == '_' && abfd->xvec->symbol_leading_char != 0) 956 || c == '@' || c == '?') 957 symbol++; 958 } 959 960 len = strlen (symbol); 961 if (import_name_type == IMPORT_NAME_UNDECORATE) 962 { 963 /* Truncate at the first '@'. */ 964 char *at = strchr (symbol, '@'); 965 966 if (at != NULL) 967 len = at - symbol; 968 } 969 970 id6->contents[0] = ordinal & 0xff; 971 id6->contents[1] = ordinal >> 8; 972 973 memcpy ((char *) id6->contents + 2, symbol, len); 974 id6->contents[len + 2] = '\0'; 975 } 976 977 if (import_name_type != IMPORT_ORDINAL) 978 { 979 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 980 pe_ILF_save_relocs (&vars, id4); 981 982 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 983 pe_ILF_save_relocs (&vars, id5); 984 } 985 986 /* Create an import symbol. */ 987 pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0); 988 imp_sym = vars.sym_ptr_ptr - 1; 989 imp_index = vars.sym_index - 1; 990 991 /* Create extra sections depending upon the type of import we are dealing with. */ 992 switch (import_type) 993 { 994 int i; 995 996 case IMPORT_CODE: 997 /* CODE functions are special, in that they get a trampoline that 998 jumps to the main import symbol. Create a .text section to hold it. 999 First we need to look up its contents in the jump table. */ 1000 for (i = NUM_ENTRIES (jtab); i--;) 1001 { 1002 if (jtab[i].size == 0) 1003 continue; 1004 if (jtab[i].magic == magic) 1005 break; 1006 } 1007 /* If we did not find a matching entry something is wrong. */ 1008 if (i < 0) 1009 abort (); 1010 1011 /* Create the .text section. */ 1012 text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE); 1013 if (text == NULL) 1014 goto error_return; 1015 1016 /* Copy in the jump code. */ 1017 memcpy (text->contents, jtab[i].data, jtab[i].size); 1018 1019 /* Create a reloc for the data in the text section. */ 1020 #ifdef MIPS_ARCH_MAGIC_WINCE 1021 if (magic == MIPS_ARCH_MAGIC_WINCE) 1022 { 1023 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S, 1024 (struct bfd_symbol **) imp_sym, 1025 imp_index); 1026 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text); 1027 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16, 1028 (struct bfd_symbol **) imp_sym, 1029 imp_index); 1030 } 1031 else 1032 #endif 1033 #ifdef AMD64MAGIC 1034 if (magic == AMD64MAGIC) 1035 { 1036 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 1037 BFD_RELOC_32_PCREL, (asymbol **) imp_sym, 1038 imp_index); 1039 } 1040 else 1041 #endif 1042 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 1043 BFD_RELOC_32, (asymbol **) imp_sym, 1044 imp_index); 1045 1046 pe_ILF_save_relocs (& vars, text); 1047 break; 1048 1049 case IMPORT_DATA: 1050 break; 1051 1052 default: 1053 /* XXX code not yet written. */ 1054 abort (); 1055 } 1056 1057 /* Initialise the bfd. */ 1058 memset (& internal_f, 0, sizeof (internal_f)); 1059 1060 internal_f.f_magic = magic; 1061 internal_f.f_symptr = 0; 1062 internal_f.f_nsyms = 0; 1063 internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */ 1064 1065 if ( ! bfd_set_start_address (abfd, (bfd_vma) 0) 1066 || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f)) 1067 goto error_return; 1068 1069 if (bfd_coff_mkobject_hook (abfd, (void *) & internal_f, NULL) == NULL) 1070 goto error_return; 1071 1072 coff_data (abfd)->pe = 1; 1073 #ifdef THUMBPEMAGIC 1074 if (vars.magic == THUMBPEMAGIC) 1075 /* Stop some linker warnings about thumb code not supporting interworking. */ 1076 coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET; 1077 #endif 1078 1079 /* Switch from file contents to memory contents. */ 1080 bfd_cache_close (abfd); 1081 1082 abfd->iostream = (void *) vars.bim; 1083 abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */; 1084 abfd->iovec = &_bfd_memory_iovec; 1085 abfd->where = 0; 1086 abfd->origin = 0; 1087 obj_sym_filepos (abfd) = 0; 1088 1089 /* Now create a symbol describing the imported value. */ 1090 switch (import_type) 1091 { 1092 case IMPORT_CODE: 1093 pe_ILF_make_a_symbol (& vars, "", symbol_name, text, 1094 BSF_NOT_AT_END | BSF_FUNCTION); 1095 1096 break; 1097 1098 case IMPORT_DATA: 1099 /* Nothing to do here. */ 1100 break; 1101 1102 default: 1103 /* XXX code not yet written. */ 1104 abort (); 1105 } 1106 1107 /* Create an import symbol for the DLL, without the .dll suffix. */ 1108 ptr = (bfd_byte *) strrchr (source_dll, '.'); 1109 if (ptr) 1110 * ptr = 0; 1111 pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0); 1112 if (ptr) 1113 * ptr = '.'; 1114 1115 /* Point the bfd at the symbol table. */ 1116 obj_symbols (abfd) = vars.sym_cache; 1117 abfd->symcount = vars.sym_index; 1118 1119 obj_raw_syments (abfd) = vars.native_syms; 1120 obj_raw_syment_count (abfd) = vars.sym_index; 1121 1122 obj_coff_external_syms (abfd) = (void *) vars.esym_table; 1123 obj_coff_keep_syms (abfd) = TRUE; 1124 1125 obj_convert (abfd) = vars.sym_table; 1126 obj_conv_table_size (abfd) = vars.sym_index; 1127 1128 obj_coff_strings (abfd) = vars.string_table; 1129 obj_coff_keep_strings (abfd) = TRUE; 1130 1131 abfd->flags |= HAS_SYMS; 1132 1133 return TRUE; 1134 1135 error_return: 1136 if (vars.bim->buffer != NULL) 1137 free (vars.bim->buffer); 1138 free (vars.bim); 1139 return FALSE; 1140 } 1141 1142 /* We have detected a Image Library Format archive element. 1143 Decode the element and return the appropriate target. */ 1144 1145 static const bfd_target * 1146 pe_ILF_object_p (bfd * abfd) 1147 { 1148 bfd_byte buffer[14]; 1149 bfd_byte * ptr; 1150 char * symbol_name; 1151 char * source_dll; 1152 unsigned int machine; 1153 bfd_size_type size; 1154 unsigned int ordinal; 1155 unsigned int types; 1156 unsigned int magic; 1157 1158 /* Upon entry the first six bytes of the ILF header have 1159 already been read. Now read the rest of the header. */ 1160 if (bfd_bread (buffer, (bfd_size_type) 14, abfd) != 14) 1161 return NULL; 1162 1163 ptr = buffer; 1164 1165 machine = H_GET_16 (abfd, ptr); 1166 ptr += 2; 1167 1168 /* Check that the machine type is recognised. */ 1169 magic = 0; 1170 1171 switch (machine) 1172 { 1173 case IMAGE_FILE_MACHINE_UNKNOWN: 1174 case IMAGE_FILE_MACHINE_ALPHA: 1175 case IMAGE_FILE_MACHINE_ALPHA64: 1176 case IMAGE_FILE_MACHINE_IA64: 1177 break; 1178 1179 case IMAGE_FILE_MACHINE_I386: 1180 #ifdef I386MAGIC 1181 magic = I386MAGIC; 1182 #endif 1183 break; 1184 1185 case IMAGE_FILE_MACHINE_AMD64: 1186 #ifdef AMD64MAGIC 1187 magic = AMD64MAGIC; 1188 #endif 1189 break; 1190 1191 case IMAGE_FILE_MACHINE_R3000: 1192 case IMAGE_FILE_MACHINE_R4000: 1193 case IMAGE_FILE_MACHINE_R10000: 1194 1195 case IMAGE_FILE_MACHINE_MIPS16: 1196 case IMAGE_FILE_MACHINE_MIPSFPU: 1197 case IMAGE_FILE_MACHINE_MIPSFPU16: 1198 #ifdef MIPS_ARCH_MAGIC_WINCE 1199 magic = MIPS_ARCH_MAGIC_WINCE; 1200 #endif 1201 break; 1202 1203 case IMAGE_FILE_MACHINE_SH3: 1204 case IMAGE_FILE_MACHINE_SH4: 1205 #ifdef SH_ARCH_MAGIC_WINCE 1206 magic = SH_ARCH_MAGIC_WINCE; 1207 #endif 1208 break; 1209 1210 case IMAGE_FILE_MACHINE_ARM: 1211 #ifdef ARMPEMAGIC 1212 magic = ARMPEMAGIC; 1213 #endif 1214 break; 1215 1216 case IMAGE_FILE_MACHINE_THUMB: 1217 #ifdef THUMBPEMAGIC 1218 { 1219 extern const bfd_target TARGET_LITTLE_SYM; 1220 1221 if (abfd->xvec == & TARGET_LITTLE_SYM) 1222 magic = THUMBPEMAGIC; 1223 } 1224 #endif 1225 break; 1226 1227 case IMAGE_FILE_MACHINE_POWERPC: 1228 /* We no longer support PowerPC. */ 1229 default: 1230 _bfd_error_handler 1231 /* xgettext:c-format */ 1232 (_("%pB: unrecognised machine type (0x%x)" 1233 " in Import Library Format archive"), 1234 abfd, machine); 1235 bfd_set_error (bfd_error_malformed_archive); 1236 1237 return NULL; 1238 break; 1239 } 1240 1241 if (magic == 0) 1242 { 1243 _bfd_error_handler 1244 /* xgettext:c-format */ 1245 (_("%pB: recognised but unhandled machine type (0x%x)" 1246 " in Import Library Format archive"), 1247 abfd, machine); 1248 bfd_set_error (bfd_error_wrong_format); 1249 1250 return NULL; 1251 } 1252 1253 /* We do not bother to check the date. 1254 date = H_GET_32 (abfd, ptr); */ 1255 ptr += 4; 1256 1257 size = H_GET_32 (abfd, ptr); 1258 ptr += 4; 1259 1260 if (size == 0) 1261 { 1262 _bfd_error_handler 1263 (_("%pB: size field is zero in Import Library Format header"), abfd); 1264 bfd_set_error (bfd_error_malformed_archive); 1265 1266 return NULL; 1267 } 1268 1269 ordinal = H_GET_16 (abfd, ptr); 1270 ptr += 2; 1271 1272 types = H_GET_16 (abfd, ptr); 1273 /* ptr += 2; */ 1274 1275 /* Now read in the two strings that follow. */ 1276 ptr = (bfd_byte *) bfd_alloc (abfd, size); 1277 if (ptr == NULL) 1278 return NULL; 1279 1280 if (bfd_bread (ptr, size, abfd) != size) 1281 { 1282 bfd_release (abfd, ptr); 1283 return NULL; 1284 } 1285 1286 symbol_name = (char *) ptr; 1287 /* See PR 20905 for an example of where the strnlen is necessary. */ 1288 source_dll = symbol_name + strnlen (symbol_name, size - 1) + 1; 1289 1290 /* Verify that the strings are null terminated. */ 1291 if (ptr[size - 1] != 0 1292 || (bfd_size_type) ((bfd_byte *) source_dll - ptr) >= size) 1293 { 1294 _bfd_error_handler 1295 (_("%pB: string not null terminated in ILF object file"), abfd); 1296 bfd_set_error (bfd_error_malformed_archive); 1297 bfd_release (abfd, ptr); 1298 return NULL; 1299 } 1300 1301 /* Now construct the bfd. */ 1302 if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name, 1303 source_dll, ordinal, types)) 1304 { 1305 bfd_release (abfd, ptr); 1306 return NULL; 1307 } 1308 1309 return abfd->xvec; 1310 } 1311 1312 static void 1313 pe_bfd_read_buildid (bfd *abfd) 1314 { 1315 pe_data_type *pe = pe_data (abfd); 1316 struct internal_extra_pe_aouthdr *extra = &pe->pe_opthdr; 1317 asection *section; 1318 bfd_byte *data = 0; 1319 bfd_size_type dataoff; 1320 unsigned int i; 1321 bfd_vma addr = extra->DataDirectory[PE_DEBUG_DATA].VirtualAddress; 1322 bfd_size_type size = extra->DataDirectory[PE_DEBUG_DATA].Size; 1323 1324 if (size == 0) 1325 return; 1326 1327 addr += extra->ImageBase; 1328 1329 /* Search for the section containing the DebugDirectory. */ 1330 for (section = abfd->sections; section != NULL; section = section->next) 1331 { 1332 if ((addr >= section->vma) && (addr < (section->vma + section->size))) 1333 break; 1334 } 1335 1336 if (section == NULL) 1337 return; 1338 1339 if (!(section->flags & SEC_HAS_CONTENTS)) 1340 return; 1341 1342 dataoff = addr - section->vma; 1343 1344 /* PR 20605 and 22373: Make sure that the data is really there. 1345 Note - since we are dealing with unsigned quantities we have 1346 to be careful to check for potential overflows. */ 1347 if (dataoff >= section->size 1348 || size > section->size - dataoff) 1349 { 1350 _bfd_error_handler 1351 (_("%pB: error: debug data ends beyond end of debug directory"), 1352 abfd); 1353 return; 1354 } 1355 1356 /* Read the whole section. */ 1357 if (!bfd_malloc_and_get_section (abfd, section, &data)) 1358 { 1359 if (data != NULL) 1360 free (data); 1361 return; 1362 } 1363 1364 /* Search for a CodeView entry in the DebugDirectory */ 1365 for (i = 0; i < size / sizeof (struct external_IMAGE_DEBUG_DIRECTORY); i++) 1366 { 1367 struct external_IMAGE_DEBUG_DIRECTORY *ext 1368 = &((struct external_IMAGE_DEBUG_DIRECTORY *)(data + dataoff))[i]; 1369 struct internal_IMAGE_DEBUG_DIRECTORY idd; 1370 1371 _bfd_XXi_swap_debugdir_in (abfd, ext, &idd); 1372 1373 if (idd.Type == PE_IMAGE_DEBUG_TYPE_CODEVIEW) 1374 { 1375 char buffer[256 + 1]; 1376 CODEVIEW_INFO *cvinfo = (CODEVIEW_INFO *) buffer; 1377 1378 /* 1379 The debug entry doesn't have to have to be in a section, in which 1380 case AddressOfRawData is 0, so always use PointerToRawData. 1381 */ 1382 if (_bfd_XXi_slurp_codeview_record (abfd, 1383 (file_ptr) idd.PointerToRawData, 1384 idd.SizeOfData, cvinfo)) 1385 { 1386 struct bfd_build_id* build_id = bfd_alloc (abfd, 1387 sizeof (struct bfd_build_id) + cvinfo->SignatureLength); 1388 if (build_id) 1389 { 1390 build_id->size = cvinfo->SignatureLength; 1391 memcpy(build_id->data, cvinfo->Signature, 1392 cvinfo->SignatureLength); 1393 abfd->build_id = build_id; 1394 } 1395 } 1396 break; 1397 } 1398 } 1399 1400 free (data); 1401 } 1402 1403 static const bfd_target * 1404 pe_bfd_object_p (bfd * abfd) 1405 { 1406 bfd_byte buffer[6]; 1407 struct external_DOS_hdr dos_hdr; 1408 struct external_PEI_IMAGE_hdr image_hdr; 1409 struct internal_filehdr internal_f; 1410 struct internal_aouthdr internal_a; 1411 file_ptr opt_hdr_size; 1412 file_ptr offset; 1413 const bfd_target *result; 1414 1415 /* Detect if this a Microsoft Import Library Format element. */ 1416 /* First read the beginning of the header. */ 1417 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1418 || bfd_bread (buffer, (bfd_size_type) 6, abfd) != 6) 1419 { 1420 if (bfd_get_error () != bfd_error_system_call) 1421 bfd_set_error (bfd_error_wrong_format); 1422 return NULL; 1423 } 1424 1425 /* Then check the magic and the version (only 0 is supported). */ 1426 if (H_GET_32 (abfd, buffer) == 0xffff0000 1427 && H_GET_16 (abfd, buffer + 4) == 0) 1428 return pe_ILF_object_p (abfd); 1429 1430 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1431 || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd) 1432 != sizeof (dos_hdr)) 1433 { 1434 if (bfd_get_error () != bfd_error_system_call) 1435 bfd_set_error (bfd_error_wrong_format); 1436 return NULL; 1437 } 1438 1439 /* There are really two magic numbers involved; the magic number 1440 that says this is a NT executable (PEI) and the magic number that 1441 determines the architecture. The former is IMAGE_DOS_SIGNATURE, stored in 1442 the e_magic field. The latter is stored in the f_magic field. 1443 If the NT magic number isn't valid, the architecture magic number 1444 could be mimicked by some other field (specifically, the number 1445 of relocs in section 3). Since this routine can only be called 1446 correctly for a PEI file, check the e_magic number here, and, if 1447 it doesn't match, clobber the f_magic number so that we don't get 1448 a false match. */ 1449 if (H_GET_16 (abfd, dos_hdr.e_magic) != IMAGE_DOS_SIGNATURE) 1450 { 1451 bfd_set_error (bfd_error_wrong_format); 1452 return NULL; 1453 } 1454 1455 offset = H_GET_32 (abfd, dos_hdr.e_lfanew); 1456 if (bfd_seek (abfd, offset, SEEK_SET) != 0 1457 || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd) 1458 != sizeof (image_hdr))) 1459 { 1460 if (bfd_get_error () != bfd_error_system_call) 1461 bfd_set_error (bfd_error_wrong_format); 1462 return NULL; 1463 } 1464 1465 if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550) 1466 { 1467 bfd_set_error (bfd_error_wrong_format); 1468 return NULL; 1469 } 1470 1471 /* Swap file header, so that we get the location for calling 1472 real_object_p. */ 1473 bfd_coff_swap_filehdr_in (abfd, &image_hdr, &internal_f); 1474 1475 if (! bfd_coff_bad_format_hook (abfd, &internal_f) 1476 || internal_f.f_opthdr > bfd_coff_aoutsz (abfd)) 1477 { 1478 bfd_set_error (bfd_error_wrong_format); 1479 return NULL; 1480 } 1481 1482 memcpy (internal_f.pe.dos_message, dos_hdr.dos_message, 1483 sizeof (internal_f.pe.dos_message)); 1484 1485 /* Read the optional header, which has variable size. */ 1486 opt_hdr_size = internal_f.f_opthdr; 1487 1488 if (opt_hdr_size != 0) 1489 { 1490 bfd_size_type amt = opt_hdr_size; 1491 void * opthdr; 1492 1493 /* PR 17521 file: 230-131433-0.004. */ 1494 if (amt < sizeof (PEAOUTHDR)) 1495 amt = sizeof (PEAOUTHDR); 1496 1497 opthdr = bfd_zalloc (abfd, amt); 1498 if (opthdr == NULL) 1499 return NULL; 1500 if (bfd_bread (opthdr, opt_hdr_size, abfd) 1501 != (bfd_size_type) opt_hdr_size) 1502 return NULL; 1503 1504 bfd_set_error (bfd_error_no_error); 1505 bfd_coff_swap_aouthdr_in (abfd, opthdr, & internal_a); 1506 if (bfd_get_error () != bfd_error_no_error) 1507 return NULL; 1508 } 1509 1510 1511 result = coff_real_object_p (abfd, internal_f.f_nscns, &internal_f, 1512 (opt_hdr_size != 0 1513 ? &internal_a 1514 : (struct internal_aouthdr *) NULL)); 1515 1516 1517 if (result) 1518 { 1519 /* Now the whole header has been processed, see if there is a build-id */ 1520 pe_bfd_read_buildid(abfd); 1521 } 1522 1523 return result; 1524 } 1525 1526 #define coff_object_p pe_bfd_object_p 1527 #endif /* COFF_IMAGE_WITH_PE */ 1528