1 /* Support for the generic parts of PE/PEI, for BFD. 2 Copyright (C) 1995-2024 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 bool (*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 bool pe_print_private_bfd_data (bfd *, void *); 68 #define coff_bfd_print_private_bfd_data pe_print_private_bfd_data 69 70 static bool (*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 bool 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 bfd_cleanup 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_peAArch64 195 # define coff_swap_filehdr_out _bfd_XX_only_swap_filehdr_out 196 #elif defined COFF_WITH_pex64 197 # define coff_swap_filehdr_out _bfd_pex64_only_swap_filehdr_out 198 #elif defined COFF_WITH_pep 199 # define coff_swap_filehdr_out _bfd_pep_only_swap_filehdr_out 200 #else 201 # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out 202 #endif 203 204 static void 205 coff_swap_scnhdr_in (bfd * abfd, void * ext, void * in) 206 { 207 SCNHDR *scnhdr_ext = (SCNHDR *) ext; 208 struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in; 209 210 memcpy (scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name)); 211 212 scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr); 213 scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr); 214 scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size); 215 scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr); 216 scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr); 217 scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr); 218 scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags); 219 220 /* MS handles overflow of line numbers by carrying into the reloc 221 field (it appears). Since it's supposed to be zero for PE 222 *IMAGE* format, that's safe. This is still a bit iffy. */ 223 #ifdef COFF_IMAGE_WITH_PE 224 scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno) 225 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16)); 226 scnhdr_int->s_nreloc = 0; 227 #else 228 scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc); 229 scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno); 230 #endif 231 232 if (scnhdr_int->s_vaddr != 0) 233 { 234 scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase; 235 /* Do not cut upper 32-bits for 64-bit vma. */ 236 #if !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64) && !defined(COFF_WITH_peLoongArch64) && !defined(COFF_WITH_peRiscV64) 237 scnhdr_int->s_vaddr &= 0xffffffff; 238 #endif 239 } 240 241 #ifndef COFF_NO_HACK_SCNHDR_SIZE 242 /* If this section holds uninitialized data and is from an object file 243 or from an executable image that has not initialized the field, 244 or if the image is an executable file and the physical size is padded, 245 use the virtual size (stored in s_paddr) instead. */ 246 if (scnhdr_int->s_paddr > 0 247 && (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 248 && (! bfd_pei_p (abfd) || scnhdr_int->s_size == 0)) 249 || (bfd_pei_p (abfd) && (scnhdr_int->s_size > scnhdr_int->s_paddr)))) 250 /* This code used to set scnhdr_int->s_paddr to 0. However, 251 coff_set_alignment_hook stores s_paddr in virt_size, which 252 only works if it correctly holds the virtual size of the 253 section. */ 254 scnhdr_int->s_size = scnhdr_int->s_paddr; 255 #endif 256 } 257 258 static bool 259 pe_mkobject (bfd * abfd) 260 { 261 /* Some x86 code followed by an ascii string. */ 262 static const char default_dos_message[64] = { 263 0x0e, 0x1f, 0xba, 0x0e, 0x00, 0xb4, 0x09, 0xcd, 264 0x21, 0xb8, 0x01, 0x4c, 0xcd, 0x21, 0x54, 0x68, 265 0x69, 0x73, 0x20, 0x70, 0x72, 0x6f, 0x67, 0x72, 266 0x61, 0x6d, 0x20, 0x63, 0x61, 0x6e, 0x6e, 0x6f, 267 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6e, 268 0x20, 0x69, 0x6e, 0x20, 0x44, 0x4f, 0x53, 0x20, 269 0x6d, 0x6f, 0x64, 0x65, 0x2e, 0x0d, 0x0d, 0x0a, 270 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; 271 272 pe_data_type *pe = bfd_zalloc (abfd, sizeof (*pe)); 273 abfd->tdata.pe_obj_data = pe; 274 if (pe == NULL) 275 return false; 276 277 pe->coff.pe = 1; 278 279 /* in_reloc_p is architecture dependent. */ 280 pe->in_reloc_p = in_reloc_p; 281 282 memcpy (pe->dos_message, default_dos_message, sizeof (pe->dos_message)); 283 284 bfd_coff_long_section_names (abfd) 285 = coff_backend_info (abfd)->_bfd_coff_long_section_names; 286 287 return true; 288 } 289 290 /* Create the COFF backend specific information. */ 291 292 static void * 293 pe_mkobject_hook (bfd * abfd, 294 void * filehdr, 295 void * aouthdr ATTRIBUTE_UNUSED) 296 { 297 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; 298 pe_data_type *pe; 299 300 if (! pe_mkobject (abfd)) 301 return NULL; 302 303 pe = pe_data (abfd); 304 pe->coff.sym_filepos = internal_f->f_symptr; 305 /* These members communicate important constants about the symbol 306 table to GDB's symbol-reading code. These `constants' 307 unfortunately vary among coff implementations... */ 308 pe->coff.local_n_btmask = N_BTMASK; 309 pe->coff.local_n_btshft = N_BTSHFT; 310 pe->coff.local_n_tmask = N_TMASK; 311 pe->coff.local_n_tshift = N_TSHIFT; 312 pe->coff.local_symesz = SYMESZ; 313 pe->coff.local_auxesz = AUXESZ; 314 pe->coff.local_linesz = LINESZ; 315 316 pe->coff.timestamp = internal_f->f_timdat; 317 318 obj_raw_syment_count (abfd) = 319 obj_conv_table_size (abfd) = 320 internal_f->f_nsyms; 321 322 pe->real_flags = internal_f->f_flags; 323 324 if ((internal_f->f_flags & F_DLL) != 0) 325 pe->dll = 1; 326 327 if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) 328 abfd->flags |= HAS_DEBUG; 329 330 #ifdef COFF_IMAGE_WITH_PE 331 if (aouthdr) 332 pe->pe_opthdr = ((struct internal_aouthdr *) aouthdr)->pe; 333 #endif 334 335 #ifdef ARM 336 if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) 337 coff_data (abfd) ->flags = 0; 338 #endif 339 340 memcpy (pe->dos_message, internal_f->pe.dos_message, 341 sizeof (pe->dos_message)); 342 343 return (void *) pe; 344 } 345 346 static bool 347 pe_print_private_bfd_data (bfd *abfd, void * vfile) 348 { 349 FILE *file = (FILE *) vfile; 350 351 if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile)) 352 return false; 353 354 if (pe_saved_coff_bfd_print_private_bfd_data == NULL) 355 return true; 356 357 fputc ('\n', file); 358 359 return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile); 360 } 361 362 /* Copy any private info we understand from the input bfd 363 to the output bfd. */ 364 365 static bool 366 pe_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 367 { 368 /* PR binutils/716: Copy the large address aware flag. 369 XXX: Should we be copying other flags or other fields in the pe_data() 370 structure ? */ 371 if (pe_data (obfd) != NULL 372 && pe_data (ibfd) != NULL 373 && pe_data (ibfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE) 374 pe_data (obfd)->real_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE; 375 376 if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd)) 377 return false; 378 379 if (pe_saved_coff_bfd_copy_private_bfd_data) 380 return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd); 381 382 return true; 383 } 384 385 #define coff_bfd_copy_private_section_data \ 386 _bfd_XX_bfd_copy_private_section_data 387 388 #define coff_get_symbol_info _bfd_XX_get_symbol_info 389 390 #ifdef COFF_IMAGE_WITH_PE 391 392 /* Code to handle Microsoft's Import Library Format. 393 Also known as LINK6 format. 394 Documentation about this format can be found at: 395 396 https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#import-library-format */ 397 398 /* The following constants specify the sizes of the various data 399 structures that we have to create in order to build a bfd describing 400 an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6 401 and SIZEOF_IDATA7 below is to allow for the possibility that we might 402 need a padding byte in order to ensure 16 bit alignment for the section's 403 contents. 404 405 The value for SIZEOF_ILF_STRINGS is computed as follows: 406 407 There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters 408 per symbol for their names (longest section name is .idata$x). 409 410 There will be two symbols for the imported value, one the symbol name 411 and one with _imp__ prefixed. Allowing for the terminating nul's this 412 is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll). 413 414 The strings in the string table must start STRING__SIZE_SIZE bytes into 415 the table in order to for the string lookup code in coffgen/coffcode to 416 work. */ 417 #define NUM_ILF_RELOCS 8 418 #define NUM_ILF_SECTIONS 6 419 #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS) 420 421 #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache)) 422 #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table)) 423 #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms)) 424 #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table)) 425 #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table)) 426 #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab)) 427 #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab)) 428 #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \ 429 + 21 + strlen (source_dll) \ 430 + NUM_ILF_SECTIONS * 9 \ 431 + STRING_SIZE_SIZE) 432 #define SIZEOF_IDATA2 (5 * 4) 433 434 /* For PEx64 idata4 & 5 have thumb size of 8 bytes. */ 435 #if defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64) 436 #define SIZEOF_IDATA4 (2 * 4) 437 #define SIZEOF_IDATA5 (2 * 4) 438 #else 439 #define SIZEOF_IDATA4 (1 * 4) 440 #define SIZEOF_IDATA5 (1 * 4) 441 #endif 442 443 #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1) 444 #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1) 445 #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata)) 446 447 #define ILF_DATA_SIZE \ 448 + SIZEOF_ILF_SYMS \ 449 + SIZEOF_ILF_SYM_TABLE \ 450 + SIZEOF_ILF_NATIVE_SYMS \ 451 + SIZEOF_ILF_SYM_PTR_TABLE \ 452 + SIZEOF_ILF_EXT_SYMS \ 453 + SIZEOF_ILF_RELOCS \ 454 + SIZEOF_ILF_INT_RELOCS \ 455 + SIZEOF_ILF_STRINGS \ 456 + SIZEOF_IDATA2 \ 457 + SIZEOF_IDATA4 \ 458 + SIZEOF_IDATA5 \ 459 + SIZEOF_IDATA6 \ 460 + SIZEOF_IDATA7 \ 461 + SIZEOF_ILF_SECTIONS \ 462 + MAX_TEXT_SECTION_SIZE 463 464 /* Create an empty relocation against the given symbol. */ 465 466 static void 467 pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars, 468 bfd_vma address, 469 bfd_reloc_code_real_type reloc, 470 struct bfd_symbol ** sym, 471 unsigned int sym_index) 472 { 473 arelent * entry; 474 struct internal_reloc * internal; 475 476 entry = vars->reltab + vars->relcount; 477 internal = vars->int_reltab + vars->relcount; 478 479 entry->address = address; 480 entry->addend = 0; 481 entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc); 482 entry->sym_ptr_ptr = sym; 483 484 internal->r_vaddr = address; 485 internal->r_symndx = sym_index; 486 internal->r_type = entry->howto ? entry->howto->type : 0; 487 488 vars->relcount ++; 489 490 BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS); 491 } 492 493 /* Create an empty relocation against the given section. */ 494 495 static void 496 pe_ILF_make_a_reloc (pe_ILF_vars * vars, 497 bfd_vma address, 498 bfd_reloc_code_real_type reloc, 499 asection_ptr sec) 500 { 501 pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr, 502 coff_section_data (vars->abfd, sec)->i); 503 } 504 505 /* Move the queued relocs into the given section. */ 506 507 static void 508 pe_ILF_save_relocs (pe_ILF_vars * vars, 509 asection_ptr sec) 510 { 511 /* Make sure that there is somewhere to store the internal relocs. */ 512 if (coff_section_data (vars->abfd, sec) == NULL) 513 /* We should probably return an error indication here. */ 514 abort (); 515 516 coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab; 517 518 sec->relocation = vars->reltab; 519 sec->reloc_count = vars->relcount; 520 sec->flags |= SEC_RELOC; 521 522 vars->reltab += vars->relcount; 523 vars->int_reltab += vars->relcount; 524 vars->relcount = 0; 525 526 BFD_ASSERT ((bfd_byte *) vars->int_reltab < (bfd_byte *) vars->string_table); 527 } 528 529 /* Create a global symbol and add it to the relevant tables. */ 530 531 static void 532 pe_ILF_make_a_symbol (pe_ILF_vars * vars, 533 const char * prefix, 534 const char * symbol_name, 535 asection_ptr section, 536 flagword extra_flags) 537 { 538 coff_symbol_type * sym; 539 combined_entry_type * ent; 540 SYMENT * esym; 541 unsigned short sclass; 542 543 if (extra_flags & BSF_LOCAL) 544 sclass = C_STAT; 545 else 546 sclass = C_EXT; 547 548 #ifdef THUMBPEMAGIC 549 if (vars->magic == THUMBPEMAGIC) 550 { 551 if (extra_flags & BSF_FUNCTION) 552 sclass = C_THUMBEXTFUNC; 553 else if (extra_flags & BSF_LOCAL) 554 sclass = C_THUMBSTAT; 555 else 556 sclass = C_THUMBEXT; 557 } 558 #endif 559 560 BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS); 561 562 sym = vars->sym_ptr; 563 ent = vars->native_ptr; 564 esym = vars->esym_ptr; 565 566 /* Copy the symbol's name into the string table. */ 567 int len = sprintf (vars->string_ptr, "%s%s", prefix, symbol_name); 568 569 if (section == NULL) 570 section = bfd_und_section_ptr; 571 572 /* Initialise the external symbol. */ 573 H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table, 574 esym->e.e.e_offset); 575 H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum); 576 esym->e_sclass[0] = sclass; 577 578 /* The following initialisations are unnecessary - the memory is 579 zero initialised. They are just kept here as reminders. */ 580 581 /* Initialise the internal symbol structure. */ 582 ent->u.syment.n_sclass = sclass; 583 ent->u.syment.n_scnum = section->target_index; 584 ent->u.syment._n._n_n._n_offset = (uintptr_t) sym; 585 ent->is_sym = true; 586 587 sym->symbol.the_bfd = vars->abfd; 588 sym->symbol.name = vars->string_ptr; 589 sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags; 590 sym->symbol.section = section; 591 sym->native = ent; 592 593 * vars->table_ptr = vars->sym_index; 594 * vars->sym_ptr_ptr = sym; 595 596 /* Adjust pointers for the next symbol. */ 597 vars->sym_index ++; 598 vars->sym_ptr ++; 599 vars->sym_ptr_ptr ++; 600 vars->table_ptr ++; 601 vars->native_ptr ++; 602 vars->esym_ptr ++; 603 vars->string_ptr += len + 1; 604 605 BFD_ASSERT (vars->string_ptr < vars->end_string_ptr); 606 } 607 608 /* Create a section. */ 609 610 static asection_ptr 611 pe_ILF_make_a_section (pe_ILF_vars * vars, 612 const char * name, 613 unsigned int size, 614 flagword extra_flags) 615 { 616 asection_ptr sec; 617 flagword flags; 618 intptr_t alignment; 619 620 sec = bfd_make_section_old_way (vars->abfd, name); 621 if (sec == NULL) 622 return NULL; 623 624 flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY; 625 626 bfd_set_section_flags (sec, flags | extra_flags); 627 628 bfd_set_section_alignment (sec, 2); 629 630 /* Check that we will not run out of space. */ 631 BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size); 632 633 /* Set the section size and contents. The actual 634 contents are filled in by our parent. */ 635 bfd_set_section_size (sec, (bfd_size_type) size); 636 sec->contents = vars->data; 637 sec->target_index = vars->sec_index ++; 638 639 /* Advance data pointer in the vars structure. */ 640 vars->data += size; 641 642 /* Skip the padding byte if it was not needed. 643 The logic here is that if the string length is odd, 644 then the entire string length, including the null byte, 645 is even and so the extra, padding byte, is not needed. */ 646 if (size & 1) 647 vars->data --; 648 649 /* PR 18758: See note in pe_ILF_buid_a_bfd. We must make sure that we 650 preserve host alignment requirements. The BFD_ASSERTs in this 651 functions will warn us if we run out of room, but we should 652 already have enough padding built in to ILF_DATA_SIZE. */ 653 #if GCC_VERSION >= 3000 654 alignment = __alignof__ (struct coff_section_tdata); 655 #else 656 alignment = 8; 657 #endif 658 vars->data 659 = (bfd_byte *) (((intptr_t) vars->data + alignment - 1) & -alignment); 660 661 /* Create a coff_section_tdata structure for our use. */ 662 sec->used_by_bfd = (struct coff_section_tdata *) vars->data; 663 vars->data += sizeof (struct coff_section_tdata); 664 665 BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size); 666 667 /* Create a symbol to refer to this section. */ 668 pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL); 669 670 /* Cache the index to the symbol in the coff_section_data structure. */ 671 coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1; 672 673 return sec; 674 } 675 676 /* This structure contains the code that goes into the .text section 677 in order to perform a jump into the DLL lookup table. The entries 678 in the table are index by the magic number used to represent the 679 machine type in the PE file. The contents of the data[] arrays in 680 these entries are stolen from the jtab[] arrays in ld/pe-dll.c. 681 The SIZE field says how many bytes in the DATA array are actually 682 used. The OFFSET field says where in the data array the address 683 of the .idata$5 section should be placed. */ 684 #define MAX_TEXT_SECTION_SIZE 32 685 686 typedef struct 687 { 688 unsigned short magic; 689 unsigned char data[MAX_TEXT_SECTION_SIZE]; 690 unsigned int size; 691 unsigned int offset; 692 } 693 jump_table; 694 695 static const jump_table jtab[] = 696 { 697 #ifdef I386MAGIC 698 { I386MAGIC, 699 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 700 8, 2 701 }, 702 #endif 703 704 #ifdef AMD64MAGIC 705 { AMD64MAGIC, 706 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 707 8, 2 708 }, 709 #endif 710 711 #ifdef MC68MAGIC 712 { MC68MAGIC, 713 { /* XXX fill me in */ }, 714 0, 0 715 }, 716 #endif 717 718 #ifdef MIPS_ARCH_MAGIC_WINCE 719 { MIPS_ARCH_MAGIC_WINCE, 720 { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, 721 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, 722 16, 0 723 }, 724 #endif 725 726 #ifdef SH_ARCH_MAGIC_WINCE 727 { SH_ARCH_MAGIC_WINCE, 728 { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 729 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 }, 730 12, 8 731 }, 732 #endif 733 734 #ifdef AARCH64MAGIC 735 /* We don't currently support jumping to DLLs, so if 736 someone does try emit a runtime trap. Through UDF #0. */ 737 { AARCH64MAGIC, 738 { 0x00, 0x00, 0x00, 0x00 }, 739 4, 0 740 }, 741 742 #endif 743 744 #ifdef ARMPEMAGIC 745 { ARMPEMAGIC, 746 { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0, 747 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00}, 748 12, 8 749 }, 750 #endif 751 752 #ifdef THUMBPEMAGIC 753 { THUMBPEMAGIC, 754 { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46, 755 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 }, 756 16, 12 757 }, 758 #endif 759 760 #ifdef LOONGARCH64MAGIC 761 /* We don't currently support jumping to DLLs, so if 762 someone does try emit a runtime trap. Through BREAK 0. */ 763 { LOONGARCH64MAGIC, 764 { 0x00, 0x00, 0x2a, 0x00 }, 765 4, 0 766 }, 767 768 #endif 769 770 #ifdef RISCV64MAGIC 771 /* We don't currently support jumping to DLLs, so if 772 someone does try emit a runtime trap. Through EBREAK. */ 773 { RISCV64MAGIC, 774 { 0x73, 0x00, 0x10, 0x00 }, 775 4, 0 776 }, 777 778 #endif 779 780 { 0, { 0 }, 0, 0 } 781 }; 782 783 #ifndef NUM_ENTRIES 784 #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0]) 785 #endif 786 787 /* Build a full BFD from the information supplied in a ILF object. */ 788 789 static bool 790 pe_ILF_build_a_bfd (bfd * abfd, 791 unsigned int magic, 792 char * symbol_name, 793 char * source_dll, 794 unsigned int ordinal, 795 unsigned int types) 796 { 797 bfd_byte * ptr; 798 pe_ILF_vars vars; 799 struct internal_filehdr internal_f; 800 unsigned int import_type; 801 unsigned int import_name_type; 802 asection_ptr id4, id5, id6 = NULL, text = NULL; 803 coff_symbol_type ** imp_sym; 804 unsigned int imp_index; 805 intptr_t alignment; 806 807 /* Decode and verify the types field of the ILF structure. */ 808 import_type = types & 0x3; 809 import_name_type = (types & 0x1c) >> 2; 810 811 switch (import_type) 812 { 813 case IMPORT_CODE: 814 case IMPORT_DATA: 815 break; 816 817 case IMPORT_CONST: 818 /* XXX code yet to be written. */ 819 /* xgettext:c-format */ 820 _bfd_error_handler (_("%pB: unhandled import type; %x"), 821 abfd, import_type); 822 return false; 823 824 default: 825 /* xgettext:c-format */ 826 _bfd_error_handler (_("%pB: unrecognized import type; %x"), 827 abfd, import_type); 828 return false; 829 } 830 831 switch (import_name_type) 832 { 833 case IMPORT_ORDINAL: 834 case IMPORT_NAME: 835 case IMPORT_NAME_NOPREFIX: 836 case IMPORT_NAME_UNDECORATE: 837 break; 838 839 default: 840 /* xgettext:c-format */ 841 _bfd_error_handler (_("%pB: unrecognized import name type; %x"), 842 abfd, import_name_type); 843 return false; 844 } 845 846 /* Initialise local variables. 847 848 Note these are kept in a structure rather than being 849 declared as statics since bfd frowns on global variables. 850 851 We are going to construct the contents of the BFD in memory, 852 so allocate all the space that we will need right now. */ 853 vars.bim 854 = (struct bfd_in_memory *) bfd_malloc ((bfd_size_type) sizeof (*vars.bim)); 855 if (vars.bim == NULL) 856 return false; 857 858 ptr = (bfd_byte *) bfd_zmalloc ((bfd_size_type) ILF_DATA_SIZE); 859 vars.bim->buffer = ptr; 860 vars.bim->size = ILF_DATA_SIZE; 861 if (ptr == NULL) 862 goto error_return; 863 864 /* Initialise the pointers to regions of the memory and the 865 other contents of the pe_ILF_vars structure as well. */ 866 vars.sym_cache = (coff_symbol_type *) ptr; 867 vars.sym_ptr = (coff_symbol_type *) ptr; 868 vars.sym_index = 0; 869 ptr += SIZEOF_ILF_SYMS; 870 871 vars.sym_table = (unsigned int *) ptr; 872 vars.table_ptr = (unsigned int *) ptr; 873 ptr += SIZEOF_ILF_SYM_TABLE; 874 875 vars.native_syms = (combined_entry_type *) ptr; 876 vars.native_ptr = (combined_entry_type *) ptr; 877 ptr += SIZEOF_ILF_NATIVE_SYMS; 878 879 vars.sym_ptr_table = (coff_symbol_type **) ptr; 880 vars.sym_ptr_ptr = (coff_symbol_type **) ptr; 881 ptr += SIZEOF_ILF_SYM_PTR_TABLE; 882 883 vars.esym_table = (SYMENT *) ptr; 884 vars.esym_ptr = (SYMENT *) ptr; 885 ptr += SIZEOF_ILF_EXT_SYMS; 886 887 vars.reltab = (arelent *) ptr; 888 vars.relcount = 0; 889 ptr += SIZEOF_ILF_RELOCS; 890 891 vars.int_reltab = (struct internal_reloc *) ptr; 892 ptr += SIZEOF_ILF_INT_RELOCS; 893 894 vars.string_table = (char *) ptr; 895 vars.string_ptr = (char *) ptr + STRING_SIZE_SIZE; 896 ptr += SIZEOF_ILF_STRINGS; 897 vars.end_string_ptr = (char *) ptr; 898 899 /* The remaining space in bim->buffer is used 900 by the pe_ILF_make_a_section() function. */ 901 902 /* PR 18758: Make sure that the data area is sufficiently aligned for 903 struct coff_section_tdata. __alignof__ is a gcc extension, hence 904 the test of GCC_VERSION. For other compilers we assume 8 byte 905 alignment. */ 906 #if GCC_VERSION >= 3000 907 alignment = __alignof__ (struct coff_section_tdata); 908 #else 909 alignment = 8; 910 #endif 911 ptr = (bfd_byte *) (((intptr_t) ptr + alignment - 1) & -alignment); 912 913 vars.data = ptr; 914 vars.abfd = abfd; 915 vars.sec_index = 0; 916 vars.magic = magic; 917 918 /* Create the initial .idata$<n> sections: 919 [.idata$2: Import Directory Table -- not needed] 920 .idata$4: Import Lookup Table 921 .idata$5: Import Address Table 922 923 Note we do not create a .idata$3 section as this is 924 created for us by the linker script. */ 925 id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0); 926 id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0); 927 if (id4 == NULL || id5 == NULL) 928 goto error_return; 929 930 /* Fill in the contents of these sections. */ 931 if (import_name_type == IMPORT_ORDINAL) 932 { 933 if (ordinal == 0) 934 /* See PR 20907 for a reproducer. */ 935 goto error_return; 936 937 #if defined(COFF_WITH_pex64) || defined(COFF_WITH_peAArch64) || defined(COFF_WITH_peLoongArch64) || defined (COFF_WITH_peRiscV64) 938 ((unsigned int *) id4->contents)[0] = ordinal; 939 ((unsigned int *) id4->contents)[1] = 0x80000000; 940 ((unsigned int *) id5->contents)[0] = ordinal; 941 ((unsigned int *) id5->contents)[1] = 0x80000000; 942 #else 943 * (unsigned int *) id4->contents = ordinal | 0x80000000; 944 * (unsigned int *) id5->contents = ordinal | 0x80000000; 945 #endif 946 } 947 else 948 { 949 char * symbol; 950 unsigned int len; 951 952 /* Create .idata$6 - the Hint Name Table. */ 953 id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0); 954 if (id6 == NULL) 955 goto error_return; 956 957 /* If necessary, trim the import symbol name. */ 958 symbol = symbol_name; 959 960 /* As used by MS compiler, '_', '@', and '?' are alternative 961 forms of USER_LABEL_PREFIX, with '?' for c++ mangled names, 962 '@' used for fastcall (in C), '_' everywhere else. Only one 963 of these is used for a symbol. We strip this leading char for 964 IMPORT_NAME_NOPREFIX and IMPORT_NAME_UNDECORATE as per the 965 PE COFF 6.0 spec (section 8.3, Import Name Type). */ 966 967 if (import_name_type != IMPORT_NAME) 968 { 969 char c = symbol[0]; 970 971 /* Check that we don't remove for targets with empty 972 USER_LABEL_PREFIX the leading underscore. */ 973 if ((c == '_' && abfd->xvec->symbol_leading_char != 0) 974 || c == '@' || c == '?') 975 symbol++; 976 } 977 978 len = strlen (symbol); 979 if (import_name_type == IMPORT_NAME_UNDECORATE) 980 { 981 /* Truncate at the first '@'. */ 982 char *at = strchr (symbol, '@'); 983 984 if (at != NULL) 985 len = at - symbol; 986 } 987 988 id6->contents[0] = ordinal & 0xff; 989 id6->contents[1] = ordinal >> 8; 990 991 memcpy ((char *) id6->contents + 2, symbol, len); 992 id6->contents[len + 2] = '\0'; 993 } 994 995 if (import_name_type != IMPORT_ORDINAL) 996 { 997 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 998 pe_ILF_save_relocs (&vars, id4); 999 1000 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 1001 pe_ILF_save_relocs (&vars, id5); 1002 } 1003 1004 /* Create an import symbol. */ 1005 pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0); 1006 imp_sym = vars.sym_ptr_ptr - 1; 1007 imp_index = vars.sym_index - 1; 1008 1009 /* Create extra sections depending upon the type of import we are dealing with. */ 1010 switch (import_type) 1011 { 1012 int i; 1013 1014 case IMPORT_CODE: 1015 /* CODE functions are special, in that they get a trampoline that 1016 jumps to the main import symbol. Create a .text section to hold it. 1017 First we need to look up its contents in the jump table. */ 1018 for (i = NUM_ENTRIES (jtab); i--;) 1019 { 1020 if (jtab[i].size == 0) 1021 continue; 1022 if (jtab[i].magic == magic) 1023 break; 1024 } 1025 /* If we did not find a matching entry something is wrong. */ 1026 if (i < 0) 1027 abort (); 1028 1029 /* Create the .text section. */ 1030 text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE); 1031 if (text == NULL) 1032 goto error_return; 1033 1034 /* Copy in the jump code. */ 1035 memcpy (text->contents, jtab[i].data, jtab[i].size); 1036 1037 /* Create a reloc for the data in the text section. */ 1038 #ifdef MIPS_ARCH_MAGIC_WINCE 1039 if (magic == MIPS_ARCH_MAGIC_WINCE) 1040 { 1041 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S, 1042 (struct bfd_symbol **) imp_sym, 1043 imp_index); 1044 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text); 1045 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16, 1046 (struct bfd_symbol **) imp_sym, 1047 imp_index); 1048 } 1049 else 1050 #endif 1051 #ifdef AMD64MAGIC 1052 if (magic == AMD64MAGIC) 1053 { 1054 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 1055 BFD_RELOC_32_PCREL, (asymbol **) imp_sym, 1056 imp_index); 1057 } 1058 else 1059 #endif 1060 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 1061 BFD_RELOC_32, (asymbol **) imp_sym, 1062 imp_index); 1063 1064 pe_ILF_save_relocs (& vars, text); 1065 break; 1066 1067 case IMPORT_DATA: 1068 break; 1069 1070 default: 1071 /* XXX code not yet written. */ 1072 abort (); 1073 } 1074 1075 /* Now create a symbol describing the imported value. */ 1076 switch (import_type) 1077 { 1078 case IMPORT_CODE: 1079 pe_ILF_make_a_symbol (& vars, "", symbol_name, text, 1080 BSF_NOT_AT_END | BSF_FUNCTION); 1081 1082 break; 1083 1084 case IMPORT_DATA: 1085 /* Nothing to do here. */ 1086 break; 1087 1088 default: 1089 /* XXX code not yet written. */ 1090 abort (); 1091 } 1092 1093 /* Create an import symbol for the DLL, without the .dll suffix. */ 1094 ptr = (bfd_byte *) strrchr (source_dll, '.'); 1095 if (ptr) 1096 * ptr = 0; 1097 pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0); 1098 if (ptr) 1099 * ptr = '.'; 1100 1101 /* Initialise the bfd. */ 1102 memset (& internal_f, 0, sizeof (internal_f)); 1103 1104 internal_f.f_magic = magic; 1105 internal_f.f_symptr = 0; 1106 internal_f.f_nsyms = 0; 1107 internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */ 1108 1109 if ( ! bfd_set_start_address (abfd, (bfd_vma) 0) 1110 || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f)) 1111 goto error_return; 1112 1113 if (bfd_coff_mkobject_hook (abfd, (void *) & internal_f, NULL) == NULL) 1114 goto error_return; 1115 1116 obj_pe (abfd) = true; 1117 #ifdef THUMBPEMAGIC 1118 if (vars.magic == THUMBPEMAGIC) 1119 /* Stop some linker warnings about thumb code not supporting interworking. */ 1120 coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET; 1121 #endif 1122 1123 /* Switch from file contents to memory contents. */ 1124 bfd_cache_close (abfd); 1125 1126 abfd->iostream = (void *) vars.bim; 1127 abfd->flags |= BFD_IN_MEMORY | HAS_SYMS; 1128 abfd->iovec = &_bfd_memory_iovec; 1129 abfd->where = 0; 1130 abfd->origin = 0; 1131 abfd->size = 0; 1132 obj_sym_filepos (abfd) = 0; 1133 1134 /* Point the bfd at the symbol table. */ 1135 obj_symbols (abfd) = vars.sym_cache; 1136 abfd->symcount = vars.sym_index; 1137 1138 obj_raw_syments (abfd) = vars.native_syms; 1139 obj_raw_syment_count (abfd) = vars.sym_index; 1140 1141 obj_coff_external_syms (abfd) = (void *) vars.esym_table; 1142 obj_coff_keep_syms (abfd) = true; 1143 1144 obj_convert (abfd) = vars.sym_table; 1145 obj_conv_table_size (abfd) = vars.sym_index; 1146 1147 obj_coff_strings (abfd) = vars.string_table; 1148 obj_coff_strings_len (abfd) = vars.string_ptr - vars.string_table; 1149 obj_coff_keep_strings (abfd) = true; 1150 1151 return true; 1152 1153 error_return: 1154 free (vars.bim->buffer); 1155 free (vars.bim); 1156 return false; 1157 } 1158 1159 /* Cleanup function, returned from check_format hook. */ 1160 1161 static void 1162 pe_ILF_cleanup (bfd *abfd) 1163 { 1164 coff_object_cleanup (abfd); 1165 1166 struct bfd_in_memory *bim = abfd->iostream; 1167 free (bim->buffer); 1168 free (bim); 1169 abfd->iostream = NULL; 1170 } 1171 1172 /* We have detected an Import Library Format archive element. 1173 Decode the element and return the appropriate target. */ 1174 1175 static bfd_cleanup 1176 pe_ILF_object_p (bfd * abfd) 1177 { 1178 bfd_byte buffer[14]; 1179 bfd_byte * ptr; 1180 char * symbol_name; 1181 char * source_dll; 1182 unsigned int machine; 1183 bfd_size_type size; 1184 unsigned int ordinal; 1185 unsigned int types; 1186 unsigned int magic; 1187 1188 /* Upon entry the first six bytes of the ILF header have 1189 already been read. Now read the rest of the header. */ 1190 if (bfd_read (buffer, 14, abfd) != 14) 1191 return NULL; 1192 1193 ptr = buffer; 1194 1195 machine = H_GET_16 (abfd, ptr); 1196 ptr += 2; 1197 1198 /* Check that the machine type is recognised. */ 1199 magic = 0; 1200 1201 switch (machine) 1202 { 1203 case IMAGE_FILE_MACHINE_UNKNOWN: 1204 case IMAGE_FILE_MACHINE_ALPHA: 1205 case IMAGE_FILE_MACHINE_ALPHA64: 1206 case IMAGE_FILE_MACHINE_IA64: 1207 break; 1208 1209 case IMAGE_FILE_MACHINE_I386: 1210 #ifdef I386MAGIC 1211 magic = I386MAGIC; 1212 #endif 1213 break; 1214 1215 case IMAGE_FILE_MACHINE_AMD64: 1216 #ifdef AMD64MAGIC 1217 magic = AMD64MAGIC; 1218 #endif 1219 break; 1220 1221 case IMAGE_FILE_MACHINE_R3000: 1222 case IMAGE_FILE_MACHINE_R4000: 1223 case IMAGE_FILE_MACHINE_R10000: 1224 1225 case IMAGE_FILE_MACHINE_MIPS16: 1226 case IMAGE_FILE_MACHINE_MIPSFPU: 1227 case IMAGE_FILE_MACHINE_MIPSFPU16: 1228 #ifdef MIPS_ARCH_MAGIC_WINCE 1229 magic = MIPS_ARCH_MAGIC_WINCE; 1230 #endif 1231 break; 1232 1233 case IMAGE_FILE_MACHINE_SH3: 1234 case IMAGE_FILE_MACHINE_SH4: 1235 #ifdef SH_ARCH_MAGIC_WINCE 1236 magic = SH_ARCH_MAGIC_WINCE; 1237 #endif 1238 break; 1239 1240 case IMAGE_FILE_MACHINE_ARM: 1241 #ifdef ARMPEMAGIC 1242 magic = ARMPEMAGIC; 1243 #endif 1244 break; 1245 1246 case IMAGE_FILE_MACHINE_ARM64: 1247 #ifdef AARCH64MAGIC 1248 magic = AARCH64MAGIC; 1249 #endif 1250 break; 1251 1252 case IMAGE_FILE_MACHINE_LOONGARCH64: 1253 #ifdef LOONGARCH64MAGIC 1254 magic = LOONGARCH64MAGIC; 1255 #endif 1256 break; 1257 1258 case IMAGE_FILE_MACHINE_RISCV64: 1259 #ifdef RISCV64MAGIC 1260 magic = RISCV64MAGIC; 1261 #endif 1262 break; 1263 1264 case IMAGE_FILE_MACHINE_THUMB: 1265 #ifdef THUMBPEMAGIC 1266 { 1267 extern const bfd_target TARGET_LITTLE_SYM; 1268 1269 if (abfd->xvec == & TARGET_LITTLE_SYM) 1270 magic = THUMBPEMAGIC; 1271 } 1272 #endif 1273 break; 1274 1275 case IMAGE_FILE_MACHINE_POWERPC: 1276 /* We no longer support PowerPC. */ 1277 default: 1278 _bfd_error_handler 1279 /* xgettext:c-format */ 1280 (_("%pB: unrecognised machine type (0x%x)" 1281 " in Import Library Format archive"), 1282 abfd, machine); 1283 bfd_set_error (bfd_error_malformed_archive); 1284 1285 return NULL; 1286 break; 1287 } 1288 1289 if (magic == 0) 1290 { 1291 _bfd_error_handler 1292 /* xgettext:c-format */ 1293 (_("%pB: recognised but unhandled machine type (0x%x)" 1294 " in Import Library Format archive"), 1295 abfd, machine); 1296 bfd_set_error (bfd_error_wrong_format); 1297 1298 return NULL; 1299 } 1300 1301 /* We do not bother to check the date. 1302 date = H_GET_32 (abfd, ptr); */ 1303 ptr += 4; 1304 1305 size = H_GET_32 (abfd, ptr); 1306 ptr += 4; 1307 1308 if (size == 0) 1309 { 1310 _bfd_error_handler 1311 (_("%pB: size field is zero in Import Library Format header"), abfd); 1312 bfd_set_error (bfd_error_malformed_archive); 1313 1314 return NULL; 1315 } 1316 1317 ordinal = H_GET_16 (abfd, ptr); 1318 ptr += 2; 1319 1320 types = H_GET_16 (abfd, ptr); 1321 /* ptr += 2; */ 1322 1323 /* Now read in the two strings that follow. */ 1324 ptr = (bfd_byte *) _bfd_alloc_and_read (abfd, size, size); 1325 if (ptr == NULL) 1326 return NULL; 1327 1328 symbol_name = (char *) ptr; 1329 /* See PR 20905 for an example of where the strnlen is necessary. */ 1330 source_dll = symbol_name + strnlen (symbol_name, size - 1) + 1; 1331 1332 /* Verify that the strings are null terminated. */ 1333 if (ptr[size - 1] != 0 1334 || (bfd_size_type) ((bfd_byte *) source_dll - ptr) >= size) 1335 { 1336 _bfd_error_handler 1337 (_("%pB: string not null terminated in ILF object file"), abfd); 1338 bfd_set_error (bfd_error_malformed_archive); 1339 bfd_release (abfd, ptr); 1340 return NULL; 1341 } 1342 1343 /* Now construct the bfd. */ 1344 if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name, 1345 source_dll, ordinal, types)) 1346 { 1347 bfd_release (abfd, ptr); 1348 return NULL; 1349 } 1350 1351 return pe_ILF_cleanup; 1352 } 1353 1354 static void 1355 pe_bfd_read_buildid (bfd *abfd) 1356 { 1357 pe_data_type *pe = pe_data (abfd); 1358 struct internal_extra_pe_aouthdr *extra = &pe->pe_opthdr; 1359 asection *section; 1360 bfd_byte *data = 0; 1361 bfd_size_type dataoff; 1362 unsigned int i; 1363 bfd_vma addr = extra->DataDirectory[PE_DEBUG_DATA].VirtualAddress; 1364 bfd_size_type size = extra->DataDirectory[PE_DEBUG_DATA].Size; 1365 1366 if (size == 0) 1367 return; 1368 1369 addr += extra->ImageBase; 1370 1371 /* Search for the section containing the DebugDirectory. */ 1372 for (section = abfd->sections; section != NULL; section = section->next) 1373 { 1374 if ((addr >= section->vma) && (addr < (section->vma + section->size))) 1375 break; 1376 } 1377 1378 if (section == NULL) 1379 return; 1380 1381 if (!(section->flags & SEC_HAS_CONTENTS)) 1382 return; 1383 1384 dataoff = addr - section->vma; 1385 1386 /* PR 20605 and 22373: Make sure that the data is really there. 1387 Note - since we are dealing with unsigned quantities we have 1388 to be careful to check for potential overflows. */ 1389 if (dataoff >= section->size 1390 || size > section->size - dataoff) 1391 { 1392 _bfd_error_handler 1393 (_("%pB: error: debug data ends beyond end of debug directory"), 1394 abfd); 1395 return; 1396 } 1397 1398 /* Read the whole section. */ 1399 if (!bfd_malloc_and_get_section (abfd, section, &data)) 1400 { 1401 free (data); 1402 return; 1403 } 1404 1405 /* Search for a CodeView entry in the DebugDirectory */ 1406 for (i = 0; i < size / sizeof (struct external_IMAGE_DEBUG_DIRECTORY); i++) 1407 { 1408 struct external_IMAGE_DEBUG_DIRECTORY *ext 1409 = &((struct external_IMAGE_DEBUG_DIRECTORY *)(data + dataoff))[i]; 1410 struct internal_IMAGE_DEBUG_DIRECTORY idd; 1411 1412 _bfd_XXi_swap_debugdir_in (abfd, ext, &idd); 1413 1414 if (idd.Type == PE_IMAGE_DEBUG_TYPE_CODEVIEW) 1415 { 1416 char buffer[256 + 1]; 1417 CODEVIEW_INFO *cvinfo = (CODEVIEW_INFO *) buffer; 1418 1419 /* 1420 The debug entry doesn't have to have to be in a section, in which 1421 case AddressOfRawData is 0, so always use PointerToRawData. 1422 */ 1423 if (_bfd_XXi_slurp_codeview_record (abfd, 1424 (file_ptr) idd.PointerToRawData, 1425 idd.SizeOfData, cvinfo, NULL)) 1426 { 1427 struct bfd_build_id* build_id = bfd_alloc (abfd, 1428 sizeof (struct bfd_build_id) + cvinfo->SignatureLength); 1429 if (build_id) 1430 { 1431 build_id->size = cvinfo->SignatureLength; 1432 memcpy(build_id->data, cvinfo->Signature, 1433 cvinfo->SignatureLength); 1434 abfd->build_id = build_id; 1435 } 1436 } 1437 break; 1438 } 1439 } 1440 1441 free (data); 1442 } 1443 1444 static bfd_cleanup 1445 pe_bfd_object_p (bfd * abfd) 1446 { 1447 bfd_byte buffer[6]; 1448 struct external_DOS_hdr dos_hdr; 1449 struct external_PEI_IMAGE_hdr image_hdr; 1450 struct internal_filehdr internal_f; 1451 struct internal_aouthdr internal_a; 1452 bfd_size_type opt_hdr_size; 1453 file_ptr offset; 1454 bfd_cleanup result; 1455 1456 /* Detect if this a Microsoft Import Library Format element. */ 1457 /* First read the beginning of the header. */ 1458 if (bfd_seek (abfd, 0, SEEK_SET) != 0 1459 || bfd_read (buffer, 6, abfd) != 6) 1460 { 1461 if (bfd_get_error () != bfd_error_system_call) 1462 bfd_set_error (bfd_error_wrong_format); 1463 return NULL; 1464 } 1465 1466 /* Then check the magic and the version (only 0 is supported). */ 1467 if (H_GET_32 (abfd, buffer) == 0xffff0000 1468 && H_GET_16 (abfd, buffer + 4) == 0) 1469 return pe_ILF_object_p (abfd); 1470 1471 if (bfd_seek (abfd, 0, SEEK_SET) != 0 1472 || bfd_read (&dos_hdr, sizeof (dos_hdr), abfd) != sizeof (dos_hdr)) 1473 { 1474 if (bfd_get_error () != bfd_error_system_call) 1475 bfd_set_error (bfd_error_wrong_format); 1476 return NULL; 1477 } 1478 1479 /* There are really two magic numbers involved; the magic number 1480 that says this is a NT executable (PEI) and the magic number that 1481 determines the architecture. The former is IMAGE_DOS_SIGNATURE, stored in 1482 the e_magic field. The latter is stored in the f_magic field. 1483 If the NT magic number isn't valid, the architecture magic number 1484 could be mimicked by some other field (specifically, the number 1485 of relocs in section 3). Since this routine can only be called 1486 correctly for a PEI file, check the e_magic number here, and, if 1487 it doesn't match, clobber the f_magic number so that we don't get 1488 a false match. */ 1489 if (H_GET_16 (abfd, dos_hdr.e_magic) != IMAGE_DOS_SIGNATURE) 1490 { 1491 bfd_set_error (bfd_error_wrong_format); 1492 return NULL; 1493 } 1494 1495 offset = H_GET_32 (abfd, dos_hdr.e_lfanew); 1496 if (bfd_seek (abfd, offset, SEEK_SET) != 0 1497 || bfd_read (&image_hdr, sizeof (image_hdr), abfd) != sizeof (image_hdr)) 1498 { 1499 if (bfd_get_error () != bfd_error_system_call) 1500 bfd_set_error (bfd_error_wrong_format); 1501 return NULL; 1502 } 1503 1504 if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550) 1505 { 1506 bfd_set_error (bfd_error_wrong_format); 1507 return NULL; 1508 } 1509 1510 /* Swap file header, so that we get the location for calling 1511 real_object_p. */ 1512 bfd_coff_swap_filehdr_in (abfd, &image_hdr, &internal_f); 1513 1514 if (! bfd_coff_bad_format_hook (abfd, &internal_f) 1515 || internal_f.f_opthdr > bfd_coff_aoutsz (abfd)) 1516 { 1517 bfd_set_error (bfd_error_wrong_format); 1518 return NULL; 1519 } 1520 1521 memcpy (internal_f.pe.dos_message, dos_hdr.dos_message, 1522 sizeof (internal_f.pe.dos_message)); 1523 1524 /* Read the optional header, which has variable size. */ 1525 opt_hdr_size = internal_f.f_opthdr; 1526 1527 if (opt_hdr_size != 0) 1528 { 1529 bfd_size_type amt = opt_hdr_size; 1530 bfd_byte * opthdr; 1531 1532 /* PR 17521 file: 230-131433-0.004. */ 1533 if (amt < sizeof (PEAOUTHDR)) 1534 amt = sizeof (PEAOUTHDR); 1535 1536 opthdr = _bfd_alloc_and_read (abfd, amt, opt_hdr_size); 1537 if (opthdr == NULL) 1538 return NULL; 1539 if (amt > opt_hdr_size) 1540 memset (opthdr + opt_hdr_size, 0, amt - opt_hdr_size); 1541 1542 bfd_coff_swap_aouthdr_in (abfd, opthdr, &internal_a); 1543 1544 struct internal_extra_pe_aouthdr *a = &internal_a.pe; 1545 1546 #ifdef ARM 1547 /* Use Subsystem to distinguish between pei-arm-little and 1548 pei-arm-wince-little. */ 1549 #ifdef WINCE 1550 if (a->Subsystem != IMAGE_SUBSYSTEM_WINDOWS_CE_GUI) 1551 #else 1552 if (a->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CE_GUI) 1553 #endif 1554 { 1555 bfd_set_error (bfd_error_wrong_format); 1556 return NULL; 1557 } 1558 #endif 1559 1560 if ((a->SectionAlignment & -a->SectionAlignment) != a->SectionAlignment 1561 || a->SectionAlignment >= 0x80000000) 1562 { 1563 _bfd_error_handler (_("%pB: adjusting invalid SectionAlignment"), 1564 abfd); 1565 a->SectionAlignment &= -a->SectionAlignment; 1566 if (a->SectionAlignment >= 0x80000000) 1567 a->SectionAlignment = 0x40000000; 1568 } 1569 1570 if ((a->FileAlignment & -a->FileAlignment) != a->FileAlignment 1571 || a->FileAlignment > a->SectionAlignment) 1572 { 1573 _bfd_error_handler (_("%pB: adjusting invalid FileAlignment"), 1574 abfd); 1575 a->FileAlignment &= -a->FileAlignment; 1576 if (a->FileAlignment > a->SectionAlignment) 1577 a->FileAlignment = a->SectionAlignment; 1578 } 1579 1580 if (a->NumberOfRvaAndSizes > IMAGE_NUMBEROF_DIRECTORY_ENTRIES) 1581 _bfd_error_handler (_("%pB: invalid NumberOfRvaAndSizes"), abfd); 1582 } 1583 1584 result = coff_real_object_p (abfd, internal_f.f_nscns, &internal_f, 1585 (opt_hdr_size != 0 1586 ? &internal_a 1587 : (struct internal_aouthdr *) NULL)); 1588 1589 if (result) 1590 { 1591 /* Now the whole header has been processed, see if there is a build-id */ 1592 pe_bfd_read_buildid(abfd); 1593 } 1594 1595 return result; 1596 } 1597 1598 #define coff_object_p pe_bfd_object_p 1599 #endif /* COFF_IMAGE_WITH_PE */ 1600