1 /* Support for the generic parts of PE/PEI, for BFD. 2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 3 Free Software Foundation, Inc. 4 Written by Cygnus Solutions. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21 22 /* Most of this hacked by Steve Chamberlain, 23 sac@cygnus.com 24 25 PE/PEI rearrangement (and code added): Donn Terry 26 Softway Systems, Inc. */ 27 28 /* Hey look, some documentation [and in a place you expect to find it]! 29 30 The main reference for the pei format is "Microsoft Portable Executable 31 and Common Object File Format Specification 4.1". Get it if you need to 32 do some serious hacking on this code. 33 34 Another reference: 35 "Peering Inside the PE: A Tour of the Win32 Portable Executable 36 File Format", MSJ 1994, Volume 9. 37 38 The *sole* difference between the pe format and the pei format is that the 39 latter has an MSDOS 2.0 .exe header on the front that prints the message 40 "This app must be run under Windows." (or some such). 41 (FIXME: Whether that statement is *really* true or not is unknown. 42 Are there more subtle differences between pe and pei formats? 43 For now assume there aren't. If you find one, then for God sakes 44 document it here!) 45 46 The Microsoft docs use the word "image" instead of "executable" because 47 the former can also refer to a DLL (shared library). Confusion can arise 48 because the `i' in `pei' also refers to "image". The `pe' format can 49 also create images (i.e. executables), it's just that to run on a win32 50 system you need to use the pei format. 51 52 FIXME: Please add more docs here so the next poor fool that has to hack 53 on this code has a chance of getting something accomplished without 54 wasting too much time. */ 55 56 #include "libpei.h" 57 58 static bfd_boolean (*pe_saved_coff_bfd_print_private_bfd_data) 59 PARAMS ((bfd *, PTR)) = 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 PARAMS ((bfd *, PTR)); 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) 71 PARAMS ((bfd *, bfd *)) = 72 #ifndef coff_bfd_copy_private_bfd_data 73 NULL; 74 #else 75 coff_bfd_copy_private_bfd_data; 76 #undef coff_bfd_copy_private_bfd_data 77 #endif 78 79 static bfd_boolean pe_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *)); 80 #define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data 81 82 #define coff_mkobject pe_mkobject 83 #define coff_mkobject_hook pe_mkobject_hook 84 85 #ifndef NO_COFF_RELOCS 86 static void coff_swap_reloc_in PARAMS ((bfd *, PTR, PTR)); 87 static unsigned int coff_swap_reloc_out PARAMS ((bfd *, PTR, PTR)); 88 #endif 89 static void coff_swap_filehdr_in PARAMS ((bfd *, PTR, PTR)); 90 static void coff_swap_scnhdr_in PARAMS ((bfd *, PTR, PTR)); 91 static bfd_boolean pe_mkobject PARAMS ((bfd *)); 92 static PTR pe_mkobject_hook PARAMS ((bfd *, PTR, PTR)); 93 94 #ifdef COFF_IMAGE_WITH_PE 95 /* This structure contains static variables used by the ILF code. */ 96 typedef asection * asection_ptr; 97 98 typedef struct 99 { 100 bfd * abfd; 101 bfd_byte * data; 102 struct bfd_in_memory * bim; 103 unsigned short magic; 104 105 arelent * reltab; 106 unsigned int relcount; 107 108 coff_symbol_type * sym_cache; 109 coff_symbol_type * sym_ptr; 110 unsigned int sym_index; 111 112 unsigned int * sym_table; 113 unsigned int * table_ptr; 114 115 combined_entry_type * native_syms; 116 combined_entry_type * native_ptr; 117 118 coff_symbol_type ** sym_ptr_table; 119 coff_symbol_type ** sym_ptr_ptr; 120 121 unsigned int sec_index; 122 123 char * string_table; 124 char * string_ptr; 125 char * end_string_ptr; 126 127 SYMENT * esym_table; 128 SYMENT * esym_ptr; 129 130 struct internal_reloc * int_reltab; 131 } 132 pe_ILF_vars; 133 134 static asection_ptr pe_ILF_make_a_section PARAMS ((pe_ILF_vars *, const char *, unsigned int, flagword)); 135 static void pe_ILF_make_a_reloc PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, asection_ptr)); 136 static void pe_ILF_make_a_symbol PARAMS ((pe_ILF_vars *, const char *, const char *, asection_ptr, flagword)); 137 static void pe_ILF_save_relocs PARAMS ((pe_ILF_vars *, asection_ptr)); 138 static void pe_ILF_make_a_symbol_reloc PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, struct bfd_symbol **, unsigned int)); 139 static bfd_boolean pe_ILF_build_a_bfd PARAMS ((bfd *, unsigned int, bfd_byte *, bfd_byte *, unsigned int, unsigned int)); 140 static const bfd_target * pe_ILF_object_p PARAMS ((bfd *)); 141 static const bfd_target * pe_bfd_object_p PARAMS ((bfd *)); 142 #endif /* COFF_IMAGE_WITH_PE */ 143 144 /**********************************************************************/ 145 146 #ifndef NO_COFF_RELOCS 147 static void 148 coff_swap_reloc_in (abfd, src, dst) 149 bfd *abfd; 150 PTR src; 151 PTR dst; 152 { 153 RELOC *reloc_src = (RELOC *) src; 154 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; 155 156 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); 157 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); 158 159 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); 160 161 #ifdef SWAP_IN_RELOC_OFFSET 162 reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, reloc_src->r_offset); 163 #endif 164 } 165 166 static unsigned int 167 coff_swap_reloc_out (abfd, src, dst) 168 bfd *abfd; 169 PTR src; 170 PTR dst; 171 { 172 struct internal_reloc *reloc_src = (struct internal_reloc *)src; 173 struct external_reloc *reloc_dst = (struct external_reloc *)dst; 174 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); 175 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); 176 177 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); 178 179 #ifdef SWAP_OUT_RELOC_OFFSET 180 SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, reloc_dst->r_offset); 181 #endif 182 #ifdef SWAP_OUT_RELOC_EXTRA 183 SWAP_OUT_RELOC_EXTRA(abfd, reloc_src, reloc_dst); 184 #endif 185 return RELSZ; 186 } 187 #endif /* not NO_COFF_RELOCS */ 188 189 static void 190 coff_swap_filehdr_in (abfd, src, dst) 191 bfd *abfd; 192 PTR src; 193 PTR dst; 194 { 195 FILHDR *filehdr_src = (FILHDR *) src; 196 struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst; 197 filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->f_magic); 198 filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src-> f_nscns); 199 filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src-> f_timdat); 200 201 filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src-> f_nsyms); 202 filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src-> f_flags); 203 filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr); 204 205 /* Other people's tools sometimes generate headers with an nsyms but 206 a zero symptr. */ 207 if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0) 208 { 209 filehdr_dst->f_nsyms = 0; 210 filehdr_dst->f_flags |= F_LSYMS; 211 } 212 213 filehdr_dst->f_opthdr = H_GET_16 (abfd, filehdr_src-> f_opthdr); 214 } 215 216 #ifdef COFF_IMAGE_WITH_PE 217 # define coff_swap_filehdr_out _bfd_XXi_only_swap_filehdr_out 218 #else 219 # define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out 220 #endif 221 222 static void 223 coff_swap_scnhdr_in (abfd, ext, in) 224 bfd *abfd; 225 PTR ext; 226 PTR in; 227 { 228 SCNHDR *scnhdr_ext = (SCNHDR *) ext; 229 struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in; 230 231 memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof (scnhdr_int->s_name)); 232 scnhdr_int->s_vaddr = GET_SCNHDR_VADDR (abfd, scnhdr_ext->s_vaddr); 233 scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr); 234 scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size); 235 scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr); 236 scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr); 237 scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr); 238 scnhdr_int->s_flags = H_GET_32 (abfd, scnhdr_ext->s_flags); 239 240 /* MS handles overflow of line numbers by carrying into the reloc 241 field (it appears). Since it's supposed to be zero for PE 242 *IMAGE* format, that's safe. This is still a bit iffy. */ 243 #ifdef COFF_IMAGE_WITH_PE 244 scnhdr_int->s_nlnno = (H_GET_16 (abfd, scnhdr_ext->s_nlnno) 245 + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16)); 246 scnhdr_int->s_nreloc = 0; 247 #else 248 scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc); 249 scnhdr_int->s_nlnno = H_GET_16 (abfd, scnhdr_ext->s_nlnno); 250 #endif 251 252 if (scnhdr_int->s_vaddr != 0) 253 { 254 scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase; 255 scnhdr_int->s_vaddr &= 0xffffffff; 256 } 257 258 #ifndef COFF_NO_HACK_SCNHDR_SIZE 259 /* If this section holds uninitialized data and is from an object file 260 or from an executable image that has not initialized the field, 261 or if the image is an executable file and the physical size is padded, 262 use the virtual size (stored in s_paddr) instead. */ 263 if (scnhdr_int->s_paddr > 0 264 && (((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0 265 && (! bfd_pe_executable_p (abfd) || scnhdr_int->s_size == 0)) 266 || (bfd_pe_executable_p (abfd) && scnhdr_int->s_size > scnhdr_int->s_paddr))) 267 { 268 scnhdr_int->s_size = scnhdr_int->s_paddr; 269 270 /* This code used to set scnhdr_int->s_paddr to 0. However, 271 coff_set_alignment_hook stores s_paddr in virt_size, which 272 only works if it correctly holds the virtual size of the 273 section. */ 274 } 275 #endif 276 } 277 278 static bfd_boolean 279 pe_mkobject (abfd) 280 bfd * abfd; 281 { 282 pe_data_type *pe; 283 bfd_size_type amt = sizeof (pe_data_type); 284 285 abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt); 286 287 if (abfd->tdata.pe_obj_data == 0) 288 return FALSE; 289 290 pe = pe_data (abfd); 291 292 pe->coff.pe = 1; 293 294 /* in_reloc_p is architecture dependent. */ 295 pe->in_reloc_p = in_reloc_p; 296 297 #ifdef PEI_FORCE_MINIMUM_ALIGNMENT 298 pe->force_minimum_alignment = 1; 299 #endif 300 #ifdef PEI_TARGET_SUBSYSTEM 301 pe->target_subsystem = PEI_TARGET_SUBSYSTEM; 302 #endif 303 304 return TRUE; 305 } 306 307 /* Create the COFF backend specific information. */ 308 static PTR 309 pe_mkobject_hook (abfd, filehdr, aouthdr) 310 bfd * abfd; 311 PTR filehdr; 312 PTR aouthdr ATTRIBUTE_UNUSED; 313 { 314 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; 315 pe_data_type *pe; 316 317 if (! pe_mkobject (abfd)) 318 return NULL; 319 320 pe = pe_data (abfd); 321 pe->coff.sym_filepos = internal_f->f_symptr; 322 /* These members communicate important constants about the symbol 323 table to GDB's symbol-reading code. These `constants' 324 unfortunately vary among coff implementations... */ 325 pe->coff.local_n_btmask = N_BTMASK; 326 pe->coff.local_n_btshft = N_BTSHFT; 327 pe->coff.local_n_tmask = N_TMASK; 328 pe->coff.local_n_tshift = N_TSHIFT; 329 pe->coff.local_symesz = SYMESZ; 330 pe->coff.local_auxesz = AUXESZ; 331 pe->coff.local_linesz = LINESZ; 332 333 pe->coff.timestamp = internal_f->f_timdat; 334 335 obj_raw_syment_count (abfd) = 336 obj_conv_table_size (abfd) = 337 internal_f->f_nsyms; 338 339 pe->real_flags = internal_f->f_flags; 340 341 if ((internal_f->f_flags & F_DLL) != 0) 342 pe->dll = 1; 343 344 if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0) 345 abfd->flags |= HAS_DEBUG; 346 347 #ifdef COFF_IMAGE_WITH_PE 348 if (aouthdr) 349 pe->pe_opthdr = ((struct internal_aouthdr *)aouthdr)->pe; 350 #endif 351 352 #ifdef ARM 353 if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags)) 354 coff_data (abfd) ->flags = 0; 355 #endif 356 357 return (PTR) pe; 358 } 359 360 static bfd_boolean 361 pe_print_private_bfd_data (abfd, vfile) 362 bfd *abfd; 363 PTR vfile; 364 { 365 FILE *file = (FILE *) vfile; 366 367 if (!_bfd_XX_print_private_bfd_data_common (abfd, vfile)) 368 return FALSE; 369 370 if (pe_saved_coff_bfd_print_private_bfd_data != NULL) 371 { 372 fputc ('\n', file); 373 374 return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile); 375 } 376 377 return TRUE; 378 } 379 380 /* Copy any private info we understand from the input bfd 381 to the output bfd. */ 382 383 static bfd_boolean 384 pe_bfd_copy_private_bfd_data (ibfd, obfd) 385 bfd *ibfd, *obfd; 386 { 387 if (!_bfd_XX_bfd_copy_private_bfd_data_common (ibfd, obfd)) 388 return FALSE; 389 390 if (pe_saved_coff_bfd_copy_private_bfd_data) 391 return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd); 392 393 return TRUE; 394 } 395 396 #define coff_bfd_copy_private_section_data \ 397 _bfd_XX_bfd_copy_private_section_data 398 399 #define coff_get_symbol_info _bfd_XX_get_symbol_info 400 401 #ifdef COFF_IMAGE_WITH_PE 402 403 /* Code to handle Microsoft's Image Library Format. 404 Also known as LINK6 format. 405 Documentation about this format can be found at: 406 407 http://msdn.microsoft.com/library/specs/pecoff_section8.htm */ 408 409 /* The following constants specify the sizes of the various data 410 structures that we have to create in order to build a bfd describing 411 an ILF object file. The final "+ 1" in the definitions of SIZEOF_IDATA6 412 and SIZEOF_IDATA7 below is to allow for the possibility that we might 413 need a padding byte in order to ensure 16 bit alignment for the section's 414 contents. 415 416 The value for SIZEOF_ILF_STRINGS is computed as follows: 417 418 There will be NUM_ILF_SECTIONS section symbols. Allow 9 characters 419 per symbol for their names (longest section name is .idata$x). 420 421 There will be two symbols for the imported value, one the symbol name 422 and one with _imp__ prefixed. Allowing for the terminating nul's this 423 is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll). 424 425 The strings in the string table must start STRING__SIZE_SIZE bytes into 426 the table in order to for the string lookup code in coffgen/coffcode to 427 work. */ 428 #define NUM_ILF_RELOCS 8 429 #define NUM_ILF_SECTIONS 6 430 #define NUM_ILF_SYMS (2 + NUM_ILF_SECTIONS) 431 432 #define SIZEOF_ILF_SYMS (NUM_ILF_SYMS * sizeof (* vars.sym_cache)) 433 #define SIZEOF_ILF_SYM_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_table)) 434 #define SIZEOF_ILF_NATIVE_SYMS (NUM_ILF_SYMS * sizeof (* vars.native_syms)) 435 #define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table)) 436 #define SIZEOF_ILF_EXT_SYMS (NUM_ILF_SYMS * sizeof (* vars.esym_table)) 437 #define SIZEOF_ILF_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.reltab)) 438 #define SIZEOF_ILF_INT_RELOCS (NUM_ILF_RELOCS * sizeof (* vars.int_reltab)) 439 #define SIZEOF_ILF_STRINGS (strlen (symbol_name) * 2 + 8 \ 440 + 21 + strlen (source_dll) \ 441 + NUM_ILF_SECTIONS * 9 \ 442 + STRING_SIZE_SIZE) 443 #define SIZEOF_IDATA2 (5 * 4) 444 #define SIZEOF_IDATA4 (1 * 4) 445 #define SIZEOF_IDATA5 (1 * 4) 446 #define SIZEOF_IDATA6 (2 + strlen (symbol_name) + 1 + 1) 447 #define SIZEOF_IDATA7 (strlen (source_dll) + 1 + 1) 448 #define SIZEOF_ILF_SECTIONS (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata)) 449 450 #define ILF_DATA_SIZE \ 451 sizeof (* vars.bim) \ 452 + SIZEOF_ILF_SYMS \ 453 + SIZEOF_ILF_SYM_TABLE \ 454 + SIZEOF_ILF_NATIVE_SYMS \ 455 + SIZEOF_ILF_SYM_PTR_TABLE \ 456 + SIZEOF_ILF_EXT_SYMS \ 457 + SIZEOF_ILF_RELOCS \ 458 + SIZEOF_ILF_INT_RELOCS \ 459 + SIZEOF_ILF_STRINGS \ 460 + SIZEOF_IDATA2 \ 461 + SIZEOF_IDATA4 \ 462 + SIZEOF_IDATA5 \ 463 + SIZEOF_IDATA6 \ 464 + SIZEOF_IDATA7 \ 465 + SIZEOF_ILF_SECTIONS \ 466 + MAX_TEXT_SECTION_SIZE 467 468 /* Create an empty relocation against the given symbol. */ 469 static void 470 pe_ILF_make_a_symbol_reloc (pe_ILF_vars * vars, 471 bfd_vma address, 472 bfd_reloc_code_real_type reloc, 473 struct bfd_symbol ** sym, 474 unsigned int sym_index) 475 { 476 arelent * entry; 477 struct internal_reloc * internal; 478 479 entry = vars->reltab + vars->relcount; 480 internal = vars->int_reltab + vars->relcount; 481 482 entry->address = address; 483 entry->addend = 0; 484 entry->howto = bfd_reloc_type_lookup (vars->abfd, reloc); 485 entry->sym_ptr_ptr = sym; 486 487 internal->r_vaddr = address; 488 internal->r_symndx = sym_index; 489 internal->r_type = entry->howto->type; 490 #if 0 /* These fields do not need to be initialised. */ 491 internal->r_size = 0; 492 internal->r_extern = 0; 493 internal->r_offset = 0; 494 #endif 495 496 vars->relcount ++; 497 498 BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS); 499 } 500 501 /* Create an empty relocation against the given section. */ 502 static void 503 pe_ILF_make_a_reloc (pe_ILF_vars * vars, 504 bfd_vma address, 505 bfd_reloc_code_real_type reloc, 506 asection_ptr sec) 507 { 508 pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr, 509 coff_section_data (vars->abfd, sec)->i); 510 } 511 512 /* Move the queued relocs into the given section. */ 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 static void 538 pe_ILF_make_a_symbol (pe_ILF_vars * vars, 539 const char * prefix, 540 const char * symbol_name, 541 asection_ptr section, 542 flagword extra_flags) 543 { 544 coff_symbol_type * sym; 545 combined_entry_type * ent; 546 SYMENT * esym; 547 unsigned short sclass; 548 549 if (extra_flags & BSF_LOCAL) 550 sclass = C_STAT; 551 else 552 sclass = C_EXT; 553 554 #ifdef THUMBPEMAGIC 555 if (vars->magic == THUMBPEMAGIC) 556 { 557 if (extra_flags & BSF_FUNCTION) 558 sclass = C_THUMBEXTFUNC; 559 else if (extra_flags & BSF_LOCAL) 560 sclass = C_THUMBSTAT; 561 else 562 sclass = C_THUMBEXT; 563 } 564 #endif 565 566 BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS); 567 568 sym = vars->sym_ptr; 569 ent = vars->native_ptr; 570 esym = vars->esym_ptr; 571 572 /* Copy the symbol's name into the string table. */ 573 sprintf (vars->string_ptr, "%s%s", prefix, symbol_name); 574 575 if (section == NULL) 576 section = (asection_ptr) & bfd_und_section; 577 578 /* Initialise the external symbol. */ 579 H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table, 580 esym->e.e.e_offset); 581 H_PUT_16 (vars->abfd, section->target_index, esym->e_scnum); 582 esym->e_sclass[0] = sclass; 583 584 /* The following initialisations are unnecessary - the memory is 585 zero initialised. They are just kept here as reminders. */ 586 #if 0 587 esym->e.e.e_zeroes = 0; 588 esym->e_value = 0; 589 esym->e_type = T_NULL; 590 esym->e_numaux = 0; 591 #endif 592 593 /* Initialise the internal symbol structure. */ 594 ent->u.syment.n_sclass = sclass; 595 ent->u.syment.n_scnum = section->target_index; 596 ent->u.syment._n._n_n._n_offset = (long) sym; 597 598 #if 0 /* See comment above. */ 599 ent->u.syment.n_value = 0; 600 ent->u.syment.n_flags = 0; 601 ent->u.syment.n_type = T_NULL; 602 ent->u.syment.n_numaux = 0; 603 ent->fix_value = 0; 604 #endif 605 606 sym->symbol.the_bfd = vars->abfd; 607 sym->symbol.name = vars->string_ptr; 608 sym->symbol.flags = BSF_EXPORT | BSF_GLOBAL | extra_flags; 609 sym->symbol.section = section; 610 sym->native = ent; 611 612 #if 0 /* See comment above. */ 613 sym->symbol.value = 0; 614 sym->symbol.udata.i = 0; 615 sym->done_lineno = FALSE; 616 sym->lineno = NULL; 617 #endif 618 619 * vars->table_ptr = vars->sym_index; 620 * vars->sym_ptr_ptr = sym; 621 622 /* Adjust pointers for the next symbol. */ 623 vars->sym_index ++; 624 vars->sym_ptr ++; 625 vars->sym_ptr_ptr ++; 626 vars->table_ptr ++; 627 vars->native_ptr ++; 628 vars->esym_ptr ++; 629 vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1; 630 631 BFD_ASSERT (vars->string_ptr < vars->end_string_ptr); 632 } 633 634 /* Create a section. */ 635 static asection_ptr 636 pe_ILF_make_a_section (pe_ILF_vars * vars, 637 const char * name, 638 unsigned int size, 639 flagword extra_flags) 640 { 641 asection_ptr sec; 642 flagword flags; 643 644 sec = bfd_make_section_old_way (vars->abfd, name); 645 if (sec == NULL) 646 return NULL; 647 648 flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY; 649 650 bfd_set_section_flags (vars->abfd, sec, flags | extra_flags); 651 652 bfd_set_section_alignment (vars->abfd, sec, 2); 653 654 /* Check that we will not run out of space. */ 655 BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size); 656 657 /* Set the section size and contents. The actual 658 contents are filled in by our parent. */ 659 bfd_set_section_size (vars->abfd, sec, (bfd_size_type) size); 660 sec->contents = vars->data; 661 sec->target_index = vars->sec_index ++; 662 663 /* Advance data pointer in the vars structure. */ 664 vars->data += size; 665 666 /* Skip the padding byte if it was not needed. 667 The logic here is that if the string length is odd, 668 then the entire string length, including the null byte, 669 is even and so the extra, padding byte, is not needed. */ 670 if (size & 1) 671 vars->data --; 672 673 /* Create a coff_section_tdata structure for our use. */ 674 sec->used_by_bfd = (struct coff_section_tdata *) vars->data; 675 vars->data += sizeof (struct coff_section_tdata); 676 677 BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size); 678 679 /* Create a symbol to refer to this section. */ 680 pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL); 681 682 /* Cache the index to the symbol in the coff_section_data structure. */ 683 coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1; 684 685 return sec; 686 } 687 688 /* This structure contains the code that goes into the .text section 689 in order to perform a jump into the DLL lookup table. The entries 690 in the table are index by the magic number used to represent the 691 machine type in the PE file. The contents of the data[] arrays in 692 these entries are stolen from the jtab[] arrays in ld/pe-dll.c. 693 The SIZE field says how many bytes in the DATA array are actually 694 used. The OFFSET field says where in the data array the address 695 of the .idata$5 section should be placed. */ 696 #define MAX_TEXT_SECTION_SIZE 32 697 698 typedef struct 699 { 700 unsigned short magic; 701 unsigned char data[MAX_TEXT_SECTION_SIZE]; 702 unsigned int size; 703 unsigned int offset; 704 } 705 jump_table; 706 707 static jump_table jtab[] = 708 { 709 #ifdef I386MAGIC 710 { I386MAGIC, 711 { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 }, 712 8, 2 713 }, 714 #endif 715 716 #ifdef MC68MAGIC 717 { MC68MAGIC, { /* XXX fill me in */ }, 0, 0 }, 718 #endif 719 #ifdef MIPS_ARCH_MAGIC_WINCE 720 { MIPS_ARCH_MAGIC_WINCE, 721 { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, 722 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, 723 16, 0 724 }, 725 #endif 726 727 #ifdef SH_ARCH_MAGIC_WINCE 728 { SH_ARCH_MAGIC_WINCE, 729 { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 730 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 }, 731 12, 8 732 }, 733 #endif 734 735 #ifdef ARMPEMAGIC 736 { ARMPEMAGIC, 737 { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0, 738 0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00}, 739 12, 8 740 }, 741 #endif 742 743 #ifdef THUMBPEMAGIC 744 { THUMBPEMAGIC, 745 { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46, 746 0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 }, 747 16, 12 748 }, 749 #endif 750 { 0, { 0 }, 0, 0 } 751 }; 752 753 #ifndef NUM_ENTRIES 754 #define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0]) 755 #endif 756 757 /* Build a full BFD from the information supplied in a ILF object. */ 758 static bfd_boolean 759 pe_ILF_build_a_bfd (bfd * abfd, 760 unsigned int magic, 761 bfd_byte * symbol_name, 762 bfd_byte * source_dll, 763 unsigned int ordinal, 764 unsigned int types) 765 { 766 bfd_byte * ptr; 767 pe_ILF_vars vars; 768 struct internal_filehdr internal_f; 769 unsigned int import_type; 770 unsigned int import_name_type; 771 asection_ptr id4, id5, id6 = NULL, text = NULL; 772 coff_symbol_type ** imp_sym; 773 unsigned int imp_index; 774 775 /* Decode and verify the types field of the ILF structure. */ 776 import_type = types & 0x3; 777 import_name_type = (types & 0x1c) >> 2; 778 779 switch (import_type) 780 { 781 case IMPORT_CODE: 782 case IMPORT_DATA: 783 break; 784 785 case IMPORT_CONST: 786 /* XXX code yet to be written. */ 787 _bfd_error_handler (_("%s: Unhandled import type; %x"), 788 bfd_archive_filename (abfd), import_type); 789 return FALSE; 790 791 default: 792 _bfd_error_handler (_("%s: Unrecognised import type; %x"), 793 bfd_archive_filename (abfd), import_type); 794 return FALSE; 795 } 796 797 switch (import_name_type) 798 { 799 case IMPORT_ORDINAL: 800 case IMPORT_NAME: 801 case IMPORT_NAME_NOPREFIX: 802 case IMPORT_NAME_UNDECORATE: 803 break; 804 805 default: 806 _bfd_error_handler (_("%s: Unrecognised import name type; %x"), 807 bfd_archive_filename (abfd), import_name_type); 808 return FALSE; 809 } 810 811 /* Initialise local variables. 812 813 Note these are kept in a structure rather than being 814 declared as statics since bfd frowns on global variables. 815 816 We are going to construct the contents of the BFD in memory, 817 so allocate all the space that we will need right now. */ 818 ptr = bfd_zalloc (abfd, (bfd_size_type) ILF_DATA_SIZE); 819 if (ptr == NULL) 820 return FALSE; 821 822 /* Create a bfd_in_memory structure. */ 823 vars.bim = (struct bfd_in_memory *) ptr; 824 vars.bim->buffer = ptr; 825 vars.bim->size = ILF_DATA_SIZE; 826 ptr += sizeof (* vars.bim); 827 828 /* Initialise the pointers to regions of the memory and the 829 other contents of the pe_ILF_vars structure as well. */ 830 vars.sym_cache = (coff_symbol_type *) ptr; 831 vars.sym_ptr = (coff_symbol_type *) ptr; 832 vars.sym_index = 0; 833 ptr += SIZEOF_ILF_SYMS; 834 835 vars.sym_table = (unsigned int *) ptr; 836 vars.table_ptr = (unsigned int *) ptr; 837 ptr += SIZEOF_ILF_SYM_TABLE; 838 839 vars.native_syms = (combined_entry_type *) ptr; 840 vars.native_ptr = (combined_entry_type *) ptr; 841 ptr += SIZEOF_ILF_NATIVE_SYMS; 842 843 vars.sym_ptr_table = (coff_symbol_type **) ptr; 844 vars.sym_ptr_ptr = (coff_symbol_type **) ptr; 845 ptr += SIZEOF_ILF_SYM_PTR_TABLE; 846 847 vars.esym_table = (SYMENT *) ptr; 848 vars.esym_ptr = (SYMENT *) ptr; 849 ptr += SIZEOF_ILF_EXT_SYMS; 850 851 vars.reltab = (arelent *) ptr; 852 vars.relcount = 0; 853 ptr += SIZEOF_ILF_RELOCS; 854 855 vars.int_reltab = (struct internal_reloc *) ptr; 856 ptr += SIZEOF_ILF_INT_RELOCS; 857 858 vars.string_table = ptr; 859 vars.string_ptr = ptr + STRING_SIZE_SIZE; 860 ptr += SIZEOF_ILF_STRINGS; 861 vars.end_string_ptr = ptr; 862 863 /* The remaining space in bim->buffer is used 864 by the pe_ILF_make_a_section() function. */ 865 vars.data = ptr; 866 vars.abfd = abfd; 867 vars.sec_index = 0; 868 vars.magic = magic; 869 870 /* Create the initial .idata$<n> sections: 871 [.idata$2: Import Directory Table -- not needed] 872 .idata$4: Import Lookup Table 873 .idata$5: Import Address Table 874 875 Note we do not create a .idata$3 section as this is 876 created for us by the linker script. */ 877 id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0); 878 id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0); 879 if (id4 == NULL || id5 == NULL) 880 return FALSE; 881 882 /* Fill in the contents of these sections. */ 883 if (import_name_type == IMPORT_ORDINAL) 884 { 885 if (ordinal == 0) 886 /* XXX - treat as IMPORT_NAME ??? */ 887 abort (); 888 889 * (unsigned int *) id4->contents = ordinal | 0x80000000; 890 * (unsigned int *) id5->contents = ordinal | 0x80000000; 891 } 892 else 893 { 894 char * symbol; 895 896 /* Create .idata$6 - the Hint Name Table. */ 897 id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0); 898 if (id6 == NULL) 899 return FALSE; 900 901 /* If necessary, trim the import symbol name. */ 902 symbol = symbol_name; 903 904 if (import_name_type != IMPORT_NAME) 905 { 906 bfd_boolean skipped_leading_underscore = FALSE; 907 bfd_boolean skipped_leading_at = FALSE; 908 bfd_boolean skipped_leading_question_mark = FALSE; 909 bfd_boolean check_again; 910 911 /* Skip any prefix in symbol_name. */ 912 -- symbol; 913 do 914 { 915 check_again = FALSE; 916 ++ symbol; 917 918 switch (*symbol) 919 { 920 case '@': 921 if (! skipped_leading_at) 922 check_again = skipped_leading_at = TRUE; 923 break; 924 case '?': 925 if (! skipped_leading_question_mark) 926 check_again = skipped_leading_question_mark = TRUE; 927 break; 928 case '_': 929 if (! skipped_leading_underscore) 930 check_again = skipped_leading_underscore = TRUE; 931 break; 932 default: 933 break; 934 } 935 } 936 while (check_again); 937 } 938 939 if (import_name_type == IMPORT_NAME_UNDECORATE) 940 { 941 /* Truncate at the first '@' */ 942 while (* symbol != 0 && * symbol != '@') 943 symbol ++; 944 945 * symbol = 0; 946 } 947 948 id6->contents[0] = ordinal & 0xff; 949 id6->contents[1] = ordinal >> 8; 950 951 strcpy (id6->contents + 2, symbol); 952 } 953 954 if (import_name_type != IMPORT_ORDINAL) 955 { 956 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 957 pe_ILF_save_relocs (&vars, id4); 958 959 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_RVA, id6); 960 pe_ILF_save_relocs (&vars, id5); 961 } 962 963 /* Create extra sections depending upon the type of import we are dealing with. */ 964 switch (import_type) 965 { 966 int i; 967 968 case IMPORT_CODE: 969 /* Create a .text section. 970 First we need to look up its contents in the jump table. */ 971 for (i = NUM_ENTRIES (jtab); i--;) 972 { 973 if (jtab[i].size == 0) 974 continue; 975 if (jtab[i].magic == magic) 976 break; 977 } 978 /* If we did not find a matching entry something is wrong. */ 979 if (i < 0) 980 abort (); 981 982 /* Create the .text section. */ 983 text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE); 984 if (text == NULL) 985 return FALSE; 986 987 /* Copy in the jump code. */ 988 memcpy (text->contents, jtab[i].data, jtab[i].size); 989 990 /* Create an import symbol. */ 991 pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0); 992 imp_sym = vars.sym_ptr_ptr - 1; 993 imp_index = vars.sym_index - 1; 994 995 /* Create a reloc for the data in the text section. */ 996 #ifdef MIPS_ARCH_MAGIC_WINCE 997 if (magic == MIPS_ARCH_MAGIC_WINCE) 998 { 999 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 0, BFD_RELOC_HI16_S, 1000 (struct bfd_symbol **) imp_sym, 1001 imp_index); 1002 pe_ILF_make_a_reloc (&vars, (bfd_vma) 0, BFD_RELOC_LO16, text); 1003 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) 4, BFD_RELOC_LO16, 1004 (struct bfd_symbol **) imp_sym, 1005 imp_index); 1006 } 1007 else 1008 #endif 1009 pe_ILF_make_a_symbol_reloc (&vars, (bfd_vma) jtab[i].offset, 1010 BFD_RELOC_32, (asymbol **) imp_sym, 1011 imp_index); 1012 1013 pe_ILF_save_relocs (& vars, text); 1014 break; 1015 1016 case IMPORT_DATA: 1017 break; 1018 1019 default: 1020 /* XXX code not yet written. */ 1021 abort (); 1022 } 1023 1024 /* Initialise the bfd. */ 1025 memset (& internal_f, 0, sizeof (internal_f)); 1026 1027 internal_f.f_magic = magic; 1028 internal_f.f_symptr = 0; 1029 internal_f.f_nsyms = 0; 1030 internal_f.f_flags = F_AR32WR | F_LNNO; /* XXX is this correct ? */ 1031 1032 if ( ! bfd_set_start_address (abfd, (bfd_vma) 0) 1033 || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f)) 1034 return FALSE; 1035 1036 if (bfd_coff_mkobject_hook (abfd, (PTR) & internal_f, NULL) == NULL) 1037 return FALSE; 1038 1039 coff_data (abfd)->pe = 1; 1040 #ifdef THUMBPEMAGIC 1041 if (vars.magic == THUMBPEMAGIC) 1042 /* Stop some linker warnings about thumb code not supporting interworking. */ 1043 coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET; 1044 #endif 1045 1046 /* Switch from file contents to memory contents. */ 1047 bfd_cache_close (abfd); 1048 1049 abfd->iostream = (PTR) vars.bim; 1050 abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */; 1051 abfd->where = 0; 1052 obj_sym_filepos (abfd) = 0; 1053 1054 /* Now create a symbol describing the imported value. */ 1055 switch (import_type) 1056 { 1057 case IMPORT_CODE: 1058 pe_ILF_make_a_symbol (& vars, "", symbol_name, text, 1059 BSF_NOT_AT_END | BSF_FUNCTION); 1060 1061 /* Create an import symbol for the DLL, without the 1062 .dll suffix. */ 1063 ptr = strrchr (source_dll, '.'); 1064 if (ptr) 1065 * ptr = 0; 1066 pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0); 1067 if (ptr) 1068 * ptr = '.'; 1069 break; 1070 1071 case IMPORT_DATA: 1072 /* Nothing to do here. */ 1073 break; 1074 1075 default: 1076 /* XXX code not yet written. */ 1077 abort (); 1078 } 1079 1080 /* Point the bfd at the symbol table. */ 1081 obj_symbols (abfd) = vars.sym_cache; 1082 bfd_get_symcount (abfd) = vars.sym_index; 1083 1084 obj_raw_syments (abfd) = vars.native_syms; 1085 obj_raw_syment_count (abfd) = vars.sym_index; 1086 1087 obj_coff_external_syms (abfd) = (PTR) vars.esym_table; 1088 obj_coff_keep_syms (abfd) = TRUE; 1089 1090 obj_convert (abfd) = vars.sym_table; 1091 obj_conv_table_size (abfd) = vars.sym_index; 1092 1093 obj_coff_strings (abfd) = vars.string_table; 1094 obj_coff_keep_strings (abfd) = TRUE; 1095 1096 abfd->flags |= HAS_SYMS; 1097 1098 return TRUE; 1099 } 1100 1101 /* We have detected a Image Library Format archive element. 1102 Decode the element and return the appropriate target. */ 1103 static const bfd_target * 1104 pe_ILF_object_p (bfd * abfd) 1105 { 1106 bfd_byte buffer[16]; 1107 bfd_byte * ptr; 1108 bfd_byte * symbol_name; 1109 bfd_byte * source_dll; 1110 unsigned int machine; 1111 bfd_size_type size; 1112 unsigned int ordinal; 1113 unsigned int types; 1114 unsigned int magic; 1115 1116 /* Upon entry the first four buyes of the ILF header have 1117 already been read. Now read the rest of the header. */ 1118 if (bfd_bread (buffer, (bfd_size_type) 16, abfd) != 16) 1119 return NULL; 1120 1121 ptr = buffer; 1122 1123 /* We do not bother to check the version number. 1124 version = H_GET_16 (abfd, ptr); */ 1125 ptr += 2; 1126 1127 machine = H_GET_16 (abfd, ptr); 1128 ptr += 2; 1129 1130 /* Check that the machine type is recognised. */ 1131 magic = 0; 1132 1133 switch (machine) 1134 { 1135 case IMAGE_FILE_MACHINE_UNKNOWN: 1136 case IMAGE_FILE_MACHINE_ALPHA: 1137 case IMAGE_FILE_MACHINE_ALPHA64: 1138 case IMAGE_FILE_MACHINE_IA64: 1139 break; 1140 1141 case IMAGE_FILE_MACHINE_I386: 1142 #ifdef I386MAGIC 1143 magic = I386MAGIC; 1144 #endif 1145 break; 1146 1147 case IMAGE_FILE_MACHINE_M68K: 1148 #ifdef MC68AGIC 1149 magic = MC68MAGIC; 1150 #endif 1151 break; 1152 1153 case IMAGE_FILE_MACHINE_R3000: 1154 case IMAGE_FILE_MACHINE_R4000: 1155 case IMAGE_FILE_MACHINE_R10000: 1156 1157 case IMAGE_FILE_MACHINE_MIPS16: 1158 case IMAGE_FILE_MACHINE_MIPSFPU: 1159 case IMAGE_FILE_MACHINE_MIPSFPU16: 1160 #ifdef MIPS_ARCH_MAGIC_WINCE 1161 magic = MIPS_ARCH_MAGIC_WINCE; 1162 #endif 1163 break; 1164 1165 case IMAGE_FILE_MACHINE_SH3: 1166 case IMAGE_FILE_MACHINE_SH4: 1167 #ifdef SH_ARCH_MAGIC_WINCE 1168 magic = SH_ARCH_MAGIC_WINCE; 1169 #endif 1170 break; 1171 1172 case IMAGE_FILE_MACHINE_ARM: 1173 #ifdef ARMPEMAGIC 1174 magic = ARMPEMAGIC; 1175 #endif 1176 break; 1177 1178 case IMAGE_FILE_MACHINE_THUMB: 1179 #ifdef THUMBPEMAGIC 1180 { 1181 extern const bfd_target TARGET_LITTLE_SYM; 1182 1183 if (abfd->xvec == & TARGET_LITTLE_SYM) 1184 magic = THUMBPEMAGIC; 1185 } 1186 #endif 1187 break; 1188 1189 case IMAGE_FILE_MACHINE_POWERPC: 1190 /* We no longer support PowerPC. */ 1191 default: 1192 _bfd_error_handler 1193 ( 1194 _("%s: Unrecognised machine type (0x%x) in Import Library Format archive"), 1195 bfd_archive_filename (abfd), machine); 1196 bfd_set_error (bfd_error_malformed_archive); 1197 1198 return NULL; 1199 break; 1200 } 1201 1202 if (magic == 0) 1203 { 1204 _bfd_error_handler 1205 ( 1206 _("%s: Recognised but unhandled machine type (0x%x) in Import Library Format archive"), 1207 bfd_archive_filename (abfd), machine); 1208 bfd_set_error (bfd_error_wrong_format); 1209 1210 return NULL; 1211 } 1212 1213 /* We do not bother to check the date. 1214 date = H_GET_32 (abfd, ptr); */ 1215 ptr += 4; 1216 1217 size = H_GET_32 (abfd, ptr); 1218 ptr += 4; 1219 1220 if (size == 0) 1221 { 1222 _bfd_error_handler 1223 (_("%s: size field is zero in Import Library Format header"), 1224 bfd_archive_filename (abfd)); 1225 bfd_set_error (bfd_error_malformed_archive); 1226 1227 return NULL; 1228 } 1229 1230 ordinal = H_GET_16 (abfd, ptr); 1231 ptr += 2; 1232 1233 types = H_GET_16 (abfd, ptr); 1234 /* ptr += 2; */ 1235 1236 /* Now read in the two strings that follow. */ 1237 ptr = bfd_alloc (abfd, size); 1238 if (ptr == NULL) 1239 return NULL; 1240 1241 if (bfd_bread (ptr, size, abfd) != size) 1242 { 1243 bfd_release (abfd, ptr); 1244 return NULL; 1245 } 1246 1247 symbol_name = ptr; 1248 source_dll = ptr + strlen (ptr) + 1; 1249 1250 /* Verify that the strings are null terminated. */ 1251 if (ptr[size - 1] != 0 || ((unsigned long) (source_dll - ptr) >= size)) 1252 { 1253 _bfd_error_handler 1254 (_("%s: string not null terminated in ILF object file."), 1255 bfd_archive_filename (abfd)); 1256 bfd_set_error (bfd_error_malformed_archive); 1257 bfd_release (abfd, ptr); 1258 return NULL; 1259 } 1260 1261 /* Now construct the bfd. */ 1262 if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name, 1263 source_dll, ordinal, types)) 1264 { 1265 bfd_release (abfd, ptr); 1266 return NULL; 1267 } 1268 1269 return abfd->xvec; 1270 } 1271 1272 static const bfd_target * 1273 pe_bfd_object_p (bfd * abfd) 1274 { 1275 bfd_byte buffer[4]; 1276 struct external_PEI_DOS_hdr dos_hdr; 1277 struct external_PEI_IMAGE_hdr image_hdr; 1278 file_ptr offset; 1279 1280 /* Detect if this a Microsoft Import Library Format element. */ 1281 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1282 || bfd_bread (buffer, (bfd_size_type) 4, abfd) != 4) 1283 { 1284 if (bfd_get_error () != bfd_error_system_call) 1285 bfd_set_error (bfd_error_wrong_format); 1286 return NULL; 1287 } 1288 1289 if (H_GET_32 (abfd, buffer) == 0xffff0000) 1290 return pe_ILF_object_p (abfd); 1291 1292 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 1293 || bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd) 1294 != sizeof (dos_hdr)) 1295 { 1296 if (bfd_get_error () != bfd_error_system_call) 1297 bfd_set_error (bfd_error_wrong_format); 1298 return NULL; 1299 } 1300 1301 /* There are really two magic numbers involved; the magic number 1302 that says this is a NT executable (PEI) and the magic number that 1303 determines the architecture. The former is DOSMAGIC, stored in 1304 the e_magic field. The latter is stored in the f_magic field. 1305 If the NT magic number isn't valid, the architecture magic number 1306 could be mimicked by some other field (specifically, the number 1307 of relocs in section 3). Since this routine can only be called 1308 correctly for a PEI file, check the e_magic number here, and, if 1309 it doesn't match, clobber the f_magic number so that we don't get 1310 a false match. */ 1311 if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC) 1312 { 1313 bfd_set_error (bfd_error_wrong_format); 1314 return NULL; 1315 } 1316 1317 offset = H_GET_32 (abfd, dos_hdr.e_lfanew); 1318 if (bfd_seek (abfd, offset, SEEK_SET) != 0 1319 || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd) 1320 != sizeof (image_hdr))) 1321 { 1322 if (bfd_get_error () != bfd_error_system_call) 1323 bfd_set_error (bfd_error_wrong_format); 1324 return NULL; 1325 } 1326 1327 if (H_GET_32 (abfd, image_hdr.nt_signature) != 0x4550) 1328 { 1329 bfd_set_error (bfd_error_wrong_format); 1330 return NULL; 1331 } 1332 1333 /* Here is the hack. coff_object_p wants to read filhsz bytes to 1334 pick up the COFF header for PE, see "struct external_PEI_filehdr" 1335 in include/coff/pe.h. We adjust so that that will work. */ 1336 if (bfd_seek (abfd, (file_ptr) (offset - sizeof (dos_hdr)), SEEK_SET) != 0) 1337 { 1338 if (bfd_get_error () != bfd_error_system_call) 1339 bfd_set_error (bfd_error_wrong_format); 1340 return NULL; 1341 } 1342 1343 return coff_object_p (abfd); 1344 } 1345 1346 #define coff_object_p pe_bfd_object_p 1347 #endif /* COFF_IMAGE_WITH_PE */ 1348