1/* Mach-O support for BFD. 2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005 3 Free Software Foundation, Inc. 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 2 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, MA 02110-1301, USA. */ 20 21#include "mach-o.h" 22#include "bfd.h" 23#include "sysdep.h" 24#include "libbfd.h" 25#include "libiberty.h" 26#include <ctype.h> 27 28#ifndef BFD_IO_FUNCS 29#define BFD_IO_FUNCS 0 30#endif 31 32#define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive 33#define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr 34#define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap 35#define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table 36#define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table 37#define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname 38#define bfd_mach_o_write_armap _bfd_noarchive_write_armap 39#define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index 40#define bfd_mach_o_generic_stat_arch_elt _bfd_noarchive_generic_stat_arch_elt 41#define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp 42#define bfd_mach_o_close_and_cleanup _bfd_generic_close_and_cleanup 43#define bfd_mach_o_bfd_free_cached_info _bfd_generic_bfd_free_cached_info 44#define bfd_mach_o_new_section_hook _bfd_generic_new_section_hook 45#define bfd_mach_o_get_section_contents_in_window _bfd_generic_get_section_contents_in_window 46#define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name 47#define bfd_mach_o_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 48#define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name 49#define bfd_mach_o_get_lineno _bfd_nosymbols_get_lineno 50#define bfd_mach_o_find_nearest_line _bfd_nosymbols_find_nearest_line 51#define bfd_mach_o_find_inliner_info _bfd_nosymbols_find_inliner_info 52#define bfd_mach_o_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 53#define bfd_mach_o_read_minisymbols _bfd_generic_read_minisymbols 54#define bfd_mach_o_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 55#define bfd_mach_o_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound 56#define bfd_mach_o_canonicalize_reloc _bfd_norelocs_canonicalize_reloc 57#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 58#define bfd_mach_o_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents 59#define bfd_mach_o_bfd_relax_section bfd_generic_relax_section 60#define bfd_mach_o_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 61#define bfd_mach_o_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 62#define bfd_mach_o_bfd_link_add_symbols _bfd_generic_link_add_symbols 63#define bfd_mach_o_bfd_link_just_syms _bfd_generic_link_just_syms 64#define bfd_mach_o_bfd_final_link _bfd_generic_final_link 65#define bfd_mach_o_bfd_link_split_section _bfd_generic_link_split_section 66#define bfd_mach_o_set_arch_mach bfd_default_set_arch_mach 67#define bfd_mach_o_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data 68#define bfd_mach_o_bfd_set_private_flags _bfd_generic_bfd_set_private_flags 69#define bfd_mach_o_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data 70#define bfd_mach_o_get_section_contents _bfd_generic_get_section_contents 71#define bfd_mach_o_set_section_contents _bfd_generic_set_section_contents 72#define bfd_mach_o_bfd_gc_sections bfd_generic_gc_sections 73#define bfd_mach_o_bfd_merge_sections bfd_generic_merge_sections 74#define bfd_mach_o_bfd_is_group_section bfd_generic_is_group_section 75#define bfd_mach_o_bfd_discard_group bfd_generic_discard_group 76#define bfd_mach_o_section_already_linked _bfd_generic_section_already_linked 77#define bfd_mach_o_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data 78#define bfd_mach_o_core_file_matches_executable_p generic_core_file_matches_executable_p 79 80 81/* The flags field of a section structure is separated into two parts a section 82 type and section attributes. The section types are mutually exclusive (it 83 can only have one type) but the section attributes are not (it may have more 84 than one attribute). */ 85 86#define SECTION_TYPE 0x000000ff /* 256 section types. */ 87#define SECTION_ATTRIBUTES 0xffffff00 /* 24 section attributes. */ 88 89/* Constants for the section attributes part of the flags field of a section 90 structure. */ 91 92#define SECTION_ATTRIBUTES_USR 0xff000000 /* User-settable attributes. */ 93#define S_ATTR_PURE_INSTRUCTIONS 0x80000000 /* Section contains only true machine instructions. */ 94#define SECTION_ATTRIBUTES_SYS 0x00ffff00 /* System setable attributes. */ 95#define S_ATTR_SOME_INSTRUCTIONS 0x00000400 /* Section contains some machine instructions. */ 96#define S_ATTR_EXT_RELOC 0x00000200 /* Section has external relocation entries. */ 97#define S_ATTR_LOC_RELOC 0x00000100 /* Section has local relocation entries. */ 98 99#define N_STAB 0xe0 100#define N_TYPE 0x1e 101#define N_EXT 0x01 102#define N_UNDF 0x0 103#define N_ABS 0x2 104#define N_SECT 0xe 105#define N_INDR 0xa 106 107bfd_boolean 108bfd_mach_o_valid (bfd *abfd) 109{ 110 if (abfd == NULL || abfd->xvec == NULL) 111 return 0; 112 113 if (! ((abfd->xvec == &mach_o_be_vec) 114 || (abfd->xvec == &mach_o_le_vec) 115 || (abfd->xvec == &mach_o_fat_vec))) 116 return 0; 117 118 if (abfd->tdata.mach_o_data == NULL) 119 return 0; 120 return 1; 121} 122 123/* Copy any private info we understand from the input symbol 124 to the output symbol. */ 125 126static bfd_boolean 127bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, 128 asymbol *isymbol ATTRIBUTE_UNUSED, 129 bfd *obfd ATTRIBUTE_UNUSED, 130 asymbol *osymbol ATTRIBUTE_UNUSED) 131{ 132 return TRUE; 133} 134 135/* Copy any private info we understand from the input section 136 to the output section. */ 137 138static bfd_boolean 139bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, 140 asection *isection ATTRIBUTE_UNUSED, 141 bfd *obfd ATTRIBUTE_UNUSED, 142 asection *osection ATTRIBUTE_UNUSED) 143{ 144 return TRUE; 145} 146 147/* Copy any private info we understand from the input bfd 148 to the output bfd. */ 149 150static bfd_boolean 151bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 152{ 153 BFD_ASSERT (bfd_mach_o_valid (ibfd)); 154 BFD_ASSERT (bfd_mach_o_valid (obfd)); 155 156 obfd->tdata.mach_o_data = ibfd->tdata.mach_o_data; 157 obfd->tdata.mach_o_data->ibfd = ibfd; 158 return TRUE; 159} 160 161static long 162bfd_mach_o_count_symbols (bfd *abfd) 163{ 164 bfd_mach_o_data_struct *mdata = NULL; 165 long nsyms = 0; 166 unsigned long i; 167 168 BFD_ASSERT (bfd_mach_o_valid (abfd)); 169 mdata = abfd->tdata.mach_o_data; 170 171 for (i = 0; i < mdata->header.ncmds; i++) 172 if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB) 173 { 174 bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab; 175 nsyms += sym->nsyms; 176 } 177 178 return nsyms; 179} 180 181static long 182bfd_mach_o_get_symtab_upper_bound (bfd *abfd) 183{ 184 long nsyms = bfd_mach_o_count_symbols (abfd); 185 186 if (nsyms < 0) 187 return nsyms; 188 189 return ((nsyms + 1) * sizeof (asymbol *)); 190} 191 192static long 193bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation) 194{ 195 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 196 long nsyms = bfd_mach_o_count_symbols (abfd); 197 asymbol **csym = alocation; 198 unsigned long i, j; 199 200 if (nsyms < 0) 201 return nsyms; 202 203 for (i = 0; i < mdata->header.ncmds; i++) 204 { 205 if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB) 206 { 207 bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab; 208 209 if (bfd_mach_o_scan_read_symtab_symbols (abfd, &mdata->commands[i].command.symtab) != 0) 210 { 211 fprintf (stderr, "bfd_mach_o_canonicalize_symtab: unable to load symbols for section %lu\n", i); 212 return 0; 213 } 214 215 BFD_ASSERT (sym->symbols != NULL); 216 217 for (j = 0; j < sym->nsyms; j++) 218 { 219 BFD_ASSERT (csym < (alocation + nsyms)); 220 *csym++ = &sym->symbols[j]; 221 } 222 } 223 } 224 225 *csym++ = NULL; 226 227 return nsyms; 228} 229 230static void 231bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, 232 asymbol *symbol, 233 symbol_info *ret) 234{ 235 bfd_symbol_info (symbol, ret); 236} 237 238static void 239bfd_mach_o_print_symbol (bfd *abfd, 240 PTR afile, 241 asymbol *symbol, 242 bfd_print_symbol_type how) 243{ 244 FILE *file = (FILE *) afile; 245 246 switch (how) 247 { 248 case bfd_print_symbol_name: 249 fprintf (file, "%s", symbol->name); 250 break; 251 default: 252 bfd_print_symbol_vandf (abfd, (PTR) file, symbol); 253 fprintf (file, " %-5s %s", symbol->section->name, symbol->name); 254 } 255} 256 257static void 258bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype, 259 bfd_mach_o_cpu_subtype msubtype ATTRIBUTE_UNUSED, 260 enum bfd_architecture *type, 261 unsigned long *subtype) 262{ 263 *subtype = bfd_arch_unknown; 264 265 switch (mtype) 266 { 267 case BFD_MACH_O_CPU_TYPE_VAX: *type = bfd_arch_vax; break; 268 case BFD_MACH_O_CPU_TYPE_MC680x0: *type = bfd_arch_m68k; break; 269 case BFD_MACH_O_CPU_TYPE_I386: *type = bfd_arch_i386; break; 270 case BFD_MACH_O_CPU_TYPE_MIPS: *type = bfd_arch_mips; break; 271 case BFD_MACH_O_CPU_TYPE_MC98000: *type = bfd_arch_m98k; break; 272 case BFD_MACH_O_CPU_TYPE_HPPA: *type = bfd_arch_hppa; break; 273 case BFD_MACH_O_CPU_TYPE_ARM: *type = bfd_arch_arm; break; 274 case BFD_MACH_O_CPU_TYPE_MC88000: *type = bfd_arch_m88k; break; 275 case BFD_MACH_O_CPU_TYPE_SPARC: *type = bfd_arch_sparc; break; 276 case BFD_MACH_O_CPU_TYPE_I860: *type = bfd_arch_i860; break; 277 case BFD_MACH_O_CPU_TYPE_ALPHA: *type = bfd_arch_alpha; break; 278 case BFD_MACH_O_CPU_TYPE_POWERPC: *type = bfd_arch_powerpc; break; 279 default: *type = bfd_arch_unknown; break; 280 } 281 282 switch (*type) 283 { 284 case bfd_arch_i386: *subtype = bfd_mach_i386_i386; break; 285 case bfd_arch_sparc: *subtype = bfd_mach_sparc; break; 286 default: 287 *subtype = bfd_arch_unknown; 288 } 289} 290 291static int 292bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header) 293{ 294 unsigned char buf[28]; 295 296 bfd_h_put_32 (abfd, header->magic, buf + 0); 297 bfd_h_put_32 (abfd, header->cputype, buf + 4); 298 bfd_h_put_32 (abfd, header->cpusubtype, buf + 8); 299 bfd_h_put_32 (abfd, header->filetype, buf + 12); 300 bfd_h_put_32 (abfd, header->ncmds, buf + 16); 301 bfd_h_put_32 (abfd, header->sizeofcmds, buf + 20); 302 bfd_h_put_32 (abfd, header->flags, buf + 24); 303 304 bfd_seek (abfd, 0, SEEK_SET); 305 if (bfd_bwrite ((PTR) buf, 28, abfd) != 28) 306 return -1; 307 308 return 0; 309} 310 311static int 312bfd_mach_o_scan_write_thread (bfd *abfd, 313 bfd_mach_o_load_command *command) 314{ 315 bfd_mach_o_thread_command *cmd = &command->command.thread; 316 unsigned int i; 317 unsigned char buf[8]; 318 bfd_vma offset; 319 unsigned int nflavours; 320 321 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 322 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 323 324 offset = 8; 325 nflavours = 0; 326 for (i = 0; i < cmd->nflavours; i++) 327 { 328 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0); 329 BFD_ASSERT (cmd->flavours[i].offset == (command->offset + offset + 8)); 330 331 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, buf); 332 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), buf + 4); 333 334 bfd_seek (abfd, command->offset + offset, SEEK_SET); 335 if (bfd_bwrite ((PTR) buf, 8, abfd) != 8) 336 return -1; 337 338 offset += cmd->flavours[i].size + 8; 339 } 340 341 return 0; 342} 343 344static int 345bfd_mach_o_scan_write_section (bfd *abfd, 346 bfd_mach_o_section *section, 347 bfd_vma offset) 348{ 349 unsigned char buf[68]; 350 351 memcpy (buf, section->sectname, 16); 352 memcpy (buf + 16, section->segname, 16); 353 bfd_h_put_32 (abfd, section->addr, buf + 32); 354 bfd_h_put_32 (abfd, section->size, buf + 36); 355 bfd_h_put_32 (abfd, section->offset, buf + 40); 356 bfd_h_put_32 (abfd, section->align, buf + 44); 357 bfd_h_put_32 (abfd, section->reloff, buf + 48); 358 bfd_h_put_32 (abfd, section->nreloc, buf + 52); 359 bfd_h_put_32 (abfd, section->flags, buf + 56); 360 /* bfd_h_put_32 (abfd, section->reserved1, buf + 60); */ 361 /* bfd_h_put_32 (abfd, section->reserved2, buf + 64); */ 362 363 bfd_seek (abfd, offset, SEEK_SET); 364 if (bfd_bwrite ((PTR) buf, 68, abfd) != 68) 365 return -1; 366 367 return 0; 368} 369 370static int 371bfd_mach_o_scan_write_segment (bfd *abfd, bfd_mach_o_load_command *command) 372{ 373 unsigned char buf[48]; 374 bfd_mach_o_segment_command *seg = &command->command.segment; 375 unsigned long i; 376 377 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 378 379 memcpy (buf, seg->segname, 16); 380 bfd_h_put_32 (abfd, seg->vmaddr, buf + 16); 381 bfd_h_put_32 (abfd, seg->vmsize, buf + 20); 382 bfd_h_put_32 (abfd, seg->fileoff, buf + 24); 383 bfd_h_put_32 (abfd, seg->filesize, buf + 28); 384 bfd_h_put_32 (abfd, 0 /* seg->maxprot */, buf + 32); 385 bfd_h_put_32 (abfd, 0 /* seg->initprot */, buf + 36); 386 bfd_h_put_32 (abfd, seg->nsects, buf + 40); 387 bfd_h_put_32 (abfd, seg->flags, buf + 44); 388 389 bfd_seek (abfd, command->offset + 8, SEEK_SET); 390 if (bfd_bwrite ((PTR) buf, 48, abfd) != 48) 391 return -1; 392 393 { 394 char buf[1024]; 395 bfd_vma nbytes = seg->filesize; 396 bfd_vma curoff = seg->fileoff; 397 398 while (nbytes > 0) 399 { 400 bfd_vma thisread = nbytes; 401 402 if (thisread > 1024) 403 thisread = 1024; 404 405 bfd_seek (abfd, curoff, SEEK_SET); 406 if (bfd_bread ((PTR) buf, thisread, abfd) != thisread) 407 return -1; 408 409 bfd_seek (abfd, curoff, SEEK_SET); 410 if (bfd_bwrite ((PTR) buf, thisread, abfd) != thisread) 411 return -1; 412 413 nbytes -= thisread; 414 curoff += thisread; 415 } 416 } 417 418 for (i = 0; i < seg->nsects; i++) 419 { 420 bfd_vma segoff = command->offset + 48 + 8 + (i * 68); 421 422 if (bfd_mach_o_scan_write_section (abfd, &seg->sections[i], segoff) != 0) 423 return -1; 424 } 425 426 return 0; 427} 428 429static int 430bfd_mach_o_scan_write_symtab_symbols (bfd *abfd, 431 bfd_mach_o_load_command *command) 432{ 433 bfd_mach_o_symtab_command *sym = &command->command.symtab; 434 asymbol *s = NULL; 435 unsigned long i; 436 437 for (i = 0; i < sym->nsyms; i++) 438 { 439 unsigned char buf[12]; 440 bfd_vma symoff = sym->symoff + (i * 12); 441 unsigned char ntype = 0; 442 unsigned char nsect = 0; 443 short ndesc = 0; 444 445 s = &sym->symbols[i]; 446 447 /* Instead just set from the stored values. */ 448 ntype = (s->udata.i >> 24) & 0xff; 449 nsect = (s->udata.i >> 16) & 0xff; 450 ndesc = s->udata.i & 0xffff; 451 452 bfd_h_put_32 (abfd, s->name - sym->strtab, buf); 453 bfd_h_put_8 (abfd, ntype, buf + 4); 454 bfd_h_put_8 (abfd, nsect, buf + 5); 455 bfd_h_put_16 (abfd, ndesc, buf + 6); 456 bfd_h_put_32 (abfd, s->section->vma + s->value, buf + 8); 457 458 bfd_seek (abfd, symoff, SEEK_SET); 459 if (bfd_bwrite ((PTR) buf, 12, abfd) != 12) 460 { 461 fprintf (stderr, "bfd_mach_o_scan_write_symtab_symbols: unable to write %d bytes at %lu\n", 462 12, (unsigned long) symoff); 463 return -1; 464 } 465 } 466 467 return 0; 468} 469 470static int 471bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command) 472{ 473 bfd_mach_o_symtab_command *seg = &command->command.symtab; 474 unsigned char buf[16]; 475 476 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 477 478 bfd_h_put_32 (abfd, seg->symoff, buf); 479 bfd_h_put_32 (abfd, seg->nsyms, buf + 4); 480 bfd_h_put_32 (abfd, seg->stroff, buf + 8); 481 bfd_h_put_32 (abfd, seg->strsize, buf + 12); 482 483 bfd_seek (abfd, command->offset + 8, SEEK_SET); 484 if (bfd_bwrite ((PTR) buf, 16, abfd) != 16) 485 return -1; 486 487 if (bfd_mach_o_scan_write_symtab_symbols (abfd, command) != 0) 488 return -1; 489 490 return 0; 491} 492 493static bfd_boolean 494bfd_mach_o_write_contents (bfd *abfd) 495{ 496 unsigned int i; 497 asection *s; 498 499 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 500 501 /* Write data sections first in case they overlap header data to be 502 written later. */ 503 504 for (s = abfd->sections; s != (asection *) NULL; s = s->next) 505 ; 506 507 /* Now write header information. */ 508 if (bfd_mach_o_write_header (abfd, &mdata->header) != 0) 509 return FALSE; 510 511 for (i = 0; i < mdata->header.ncmds; i++) 512 { 513 unsigned char buf[8]; 514 bfd_mach_o_load_command *cur = &mdata->commands[i]; 515 unsigned long typeflag; 516 517 typeflag = cur->type_required ? cur->type & BFD_MACH_O_LC_REQ_DYLD : cur->type; 518 519 bfd_h_put_32 (abfd, typeflag, buf); 520 bfd_h_put_32 (abfd, cur->len, buf + 4); 521 522 bfd_seek (abfd, cur->offset, SEEK_SET); 523 if (bfd_bwrite ((PTR) buf, 8, abfd) != 8) 524 return FALSE; 525 526 switch (cur->type) 527 { 528 case BFD_MACH_O_LC_SEGMENT: 529 if (bfd_mach_o_scan_write_segment (abfd, cur) != 0) 530 return FALSE; 531 break; 532 case BFD_MACH_O_LC_SYMTAB: 533 if (bfd_mach_o_scan_write_symtab (abfd, cur) != 0) 534 return FALSE; 535 break; 536 case BFD_MACH_O_LC_SYMSEG: 537 break; 538 case BFD_MACH_O_LC_THREAD: 539 case BFD_MACH_O_LC_UNIXTHREAD: 540 if (bfd_mach_o_scan_write_thread (abfd, cur) != 0) 541 return FALSE; 542 break; 543 case BFD_MACH_O_LC_LOADFVMLIB: 544 case BFD_MACH_O_LC_IDFVMLIB: 545 case BFD_MACH_O_LC_IDENT: 546 case BFD_MACH_O_LC_FVMFILE: 547 case BFD_MACH_O_LC_PREPAGE: 548 case BFD_MACH_O_LC_DYSYMTAB: 549 case BFD_MACH_O_LC_LOAD_DYLIB: 550 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 551 case BFD_MACH_O_LC_ID_DYLIB: 552 case BFD_MACH_O_LC_LOAD_DYLINKER: 553 case BFD_MACH_O_LC_ID_DYLINKER: 554 case BFD_MACH_O_LC_PREBOUND_DYLIB: 555 case BFD_MACH_O_LC_ROUTINES: 556 case BFD_MACH_O_LC_SUB_FRAMEWORK: 557 break; 558 default: 559 fprintf (stderr, 560 "unable to write unknown load command 0x%lx\n", 561 (long) cur->type); 562 return FALSE; 563 } 564 } 565 566 return TRUE; 567} 568 569static int 570bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, 571 bfd_boolean b ATTRIBUTE_UNUSED) 572{ 573 return 0; 574} 575 576/* Make an empty symbol. This is required only because 577 bfd_make_section_anyway wants to create a symbol for the section. */ 578 579static asymbol * 580bfd_mach_o_make_empty_symbol (bfd *abfd) 581{ 582 asymbol *new; 583 584 new = bfd_zalloc (abfd, sizeof (* new)); 585 if (new == NULL) 586 return new; 587 new->the_bfd = abfd; 588 return new; 589} 590 591static int 592bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header) 593{ 594 unsigned char buf[28]; 595 bfd_vma (*get32) (const void *) = NULL; 596 597 bfd_seek (abfd, 0, SEEK_SET); 598 599 if (bfd_bread ((PTR) buf, 28, abfd) != 28) 600 return -1; 601 602 if (bfd_getb32 (buf) == 0xfeedface) 603 { 604 header->byteorder = BFD_ENDIAN_BIG; 605 header->magic = 0xfeedface; 606 get32 = bfd_getb32; 607 } 608 else if (bfd_getl32 (buf) == 0xfeedface) 609 { 610 header->byteorder = BFD_ENDIAN_LITTLE; 611 header->magic = 0xfeedface; 612 get32 = bfd_getl32; 613 } 614 else 615 { 616 header->byteorder = BFD_ENDIAN_UNKNOWN; 617 return -1; 618 } 619 620 header->cputype = (*get32) (buf + 4); 621 header->cpusubtype = (*get32) (buf + 8); 622 header->filetype = (*get32) (buf + 12); 623 header->ncmds = (*get32) (buf + 16); 624 header->sizeofcmds = (*get32) (buf + 20); 625 header->flags = (*get32) (buf + 24); 626 627 return 0; 628} 629 630static asection * 631bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section) 632{ 633 asection *bfdsec; 634 char *sname; 635 const char *prefix = "LC_SEGMENT"; 636 unsigned int snamelen; 637 638 snamelen = strlen (prefix) + 1 639 + strlen (section->segname) + 1 640 + strlen (section->sectname) + 1; 641 642 sname = bfd_alloc (abfd, snamelen); 643 if (sname == NULL) 644 return NULL; 645 sprintf (sname, "%s.%s.%s", prefix, section->segname, section->sectname); 646 647 bfdsec = bfd_make_section_anyway (abfd, sname); 648 if (bfdsec == NULL) 649 return NULL; 650 651 bfdsec->vma = section->addr; 652 bfdsec->lma = section->addr; 653 bfdsec->size = section->size; 654 bfdsec->filepos = section->offset; 655 bfdsec->alignment_power = section->align; 656 657 if (section->flags & BFD_MACH_O_S_ZEROFILL) 658 bfdsec->flags = SEC_ALLOC; 659 else 660 bfdsec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE; 661 662 return bfdsec; 663} 664 665static int 666bfd_mach_o_scan_read_section (bfd *abfd, 667 bfd_mach_o_section *section, 668 bfd_vma offset) 669{ 670 unsigned char buf[68]; 671 672 bfd_seek (abfd, offset, SEEK_SET); 673 if (bfd_bread ((PTR) buf, 68, abfd) != 68) 674 return -1; 675 676 memcpy (section->sectname, buf, 16); 677 section->sectname[16] = '\0'; 678 memcpy (section->segname, buf + 16, 16); 679 section->segname[16] = '\0'; 680 section->addr = bfd_h_get_32 (abfd, buf + 32); 681 section->size = bfd_h_get_32 (abfd, buf + 36); 682 section->offset = bfd_h_get_32 (abfd, buf + 40); 683 section->align = bfd_h_get_32 (abfd, buf + 44); 684 section->reloff = bfd_h_get_32 (abfd, buf + 48); 685 section->nreloc = bfd_h_get_32 (abfd, buf + 52); 686 section->flags = bfd_h_get_32 (abfd, buf + 56); 687 section->reserved1 = bfd_h_get_32 (abfd, buf + 60); 688 section->reserved2 = bfd_h_get_32 (abfd, buf + 64); 689 section->bfdsection = bfd_mach_o_make_bfd_section (abfd, section); 690 691 if (section->bfdsection == NULL) 692 return -1; 693 694 return 0; 695} 696 697int 698bfd_mach_o_scan_read_symtab_symbol (bfd *abfd, 699 bfd_mach_o_symtab_command *sym, 700 asymbol *s, 701 unsigned long i) 702{ 703 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 704 bfd_vma symoff = sym->symoff + (i * 12); 705 unsigned char buf[12]; 706 unsigned char type = -1; 707 unsigned char section = -1; 708 short desc = -1; 709 unsigned long value = -1; 710 unsigned long stroff = -1; 711 unsigned int symtype = -1; 712 713 BFD_ASSERT (sym->strtab != NULL); 714 715 bfd_seek (abfd, symoff, SEEK_SET); 716 if (bfd_bread ((PTR) buf, 12, abfd) != 12) 717 { 718 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: unable to read %d bytes at %lu\n", 719 12, (unsigned long) symoff); 720 return -1; 721 } 722 723 stroff = bfd_h_get_32 (abfd, buf); 724 type = bfd_h_get_8 (abfd, buf + 4); 725 symtype = (type & 0x0e); 726 section = bfd_h_get_8 (abfd, buf + 5) - 1; 727 desc = bfd_h_get_16 (abfd, buf + 6); 728 value = bfd_h_get_32 (abfd, buf + 8); 729 730 if (stroff >= sym->strsize) 731 { 732 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: symbol name out of range (%lu >= %lu)\n", 733 (unsigned long) stroff, (unsigned long) sym->strsize); 734 return -1; 735 } 736 737 s->the_bfd = abfd; 738 s->name = sym->strtab + stroff; 739 s->value = value; 740 s->udata.i = (type << 24) | (section << 16) | desc; 741 s->flags = 0x0; 742 743 if (type & BFD_MACH_O_N_STAB) 744 { 745 s->flags |= BSF_DEBUGGING; 746 s->section = bfd_und_section_ptr; 747 } 748 else 749 { 750 if (type & BFD_MACH_O_N_PEXT) 751 { 752 type &= ~BFD_MACH_O_N_PEXT; 753 s->flags |= BSF_GLOBAL; 754 } 755 756 if (type & BFD_MACH_O_N_EXT) 757 { 758 type &= ~BFD_MACH_O_N_EXT; 759 s->flags |= BSF_GLOBAL; 760 } 761 762 switch (symtype) 763 { 764 case BFD_MACH_O_N_UNDF: 765 s->section = bfd_und_section_ptr; 766 break; 767 case BFD_MACH_O_N_PBUD: 768 s->section = bfd_und_section_ptr; 769 break; 770 case BFD_MACH_O_N_ABS: 771 s->section = bfd_abs_section_ptr; 772 break; 773 case BFD_MACH_O_N_SECT: 774 if ((section > 0) && (section <= mdata->nsects)) 775 { 776 s->section = mdata->sections[section - 1]->bfdsection; 777 s->value = s->value - mdata->sections[section - 1]->addr; 778 } 779 else 780 { 781 /* Mach-O uses 0 to mean "no section"; not an error. */ 782 if (section != 0) 783 { 784 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: " 785 "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined\n", 786 s->name, section, mdata->nsects); 787 } 788 s->section = bfd_und_section_ptr; 789 } 790 break; 791 case BFD_MACH_O_N_INDR: 792 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: " 793 "symbol \"%s\" is unsupported 'indirect' reference: setting to undefined\n", 794 s->name); 795 s->section = bfd_und_section_ptr; 796 break; 797 default: 798 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: " 799 "symbol \"%s\" specified invalid type field 0x%x: setting to undefined\n", 800 s->name, symtype); 801 s->section = bfd_und_section_ptr; 802 break; 803 } 804 } 805 806 return 0; 807} 808 809int 810bfd_mach_o_scan_read_symtab_strtab (bfd *abfd, 811 bfd_mach_o_symtab_command *sym) 812{ 813 BFD_ASSERT (sym->strtab == NULL); 814 815 if (abfd->flags & BFD_IN_MEMORY) 816 { 817 struct bfd_in_memory *b; 818 819 b = (struct bfd_in_memory *) abfd->iostream; 820 821 if ((sym->stroff + sym->strsize) > b->size) 822 { 823 bfd_set_error (bfd_error_file_truncated); 824 return -1; 825 } 826 sym->strtab = (char *) b->buffer + sym->stroff; 827 return 0; 828 } 829 830 sym->strtab = bfd_alloc (abfd, sym->strsize); 831 if (sym->strtab == NULL) 832 return -1; 833 834 bfd_seek (abfd, sym->stroff, SEEK_SET); 835 if (bfd_bread ((PTR) sym->strtab, sym->strsize, abfd) != sym->strsize) 836 { 837 fprintf (stderr, "bfd_mach_o_scan_read_symtab_strtab: unable to read %lu bytes at %lu\n", 838 sym->strsize, sym->stroff); 839 return -1; 840 } 841 842 return 0; 843} 844 845int 846bfd_mach_o_scan_read_symtab_symbols (bfd *abfd, 847 bfd_mach_o_symtab_command *sym) 848{ 849 unsigned long i; 850 int ret; 851 852 BFD_ASSERT (sym->symbols == NULL); 853 sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (asymbol)); 854 855 if (sym->symbols == NULL) 856 { 857 fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbols: unable to allocate memory for symbols\n"); 858 return -1; 859 } 860 861 ret = bfd_mach_o_scan_read_symtab_strtab (abfd, sym); 862 if (ret != 0) 863 return ret; 864 865 for (i = 0; i < sym->nsyms; i++) 866 { 867 ret = bfd_mach_o_scan_read_symtab_symbol (abfd, sym, &sym->symbols[i], i); 868 if (ret != 0) 869 return ret; 870 } 871 872 return 0; 873} 874 875int 876bfd_mach_o_scan_read_dysymtab_symbol (bfd *abfd, 877 bfd_mach_o_dysymtab_command *dysym, 878 bfd_mach_o_symtab_command *sym, 879 asymbol *s, 880 unsigned long i) 881{ 882 unsigned long isymoff = dysym->indirectsymoff + (i * 4); 883 unsigned long symindex; 884 unsigned char buf[4]; 885 886 BFD_ASSERT (i < dysym->nindirectsyms); 887 888 bfd_seek (abfd, isymoff, SEEK_SET); 889 if (bfd_bread ((PTR) buf, 4, abfd) != 4) 890 { 891 fprintf (stderr, "bfd_mach_o_scan_read_dysymtab_symbol: unable to read %lu bytes at %lu\n", 892 (unsigned long) 4, isymoff); 893 return -1; 894 } 895 symindex = bfd_h_get_32 (abfd, buf); 896 897 return bfd_mach_o_scan_read_symtab_symbol (abfd, sym, s, symindex); 898} 899 900static const char * 901bfd_mach_o_i386_flavour_string (unsigned int flavour) 902{ 903 switch ((int) flavour) 904 { 905 case BFD_MACH_O_i386_NEW_THREAD_STATE: return "i386_NEW_THREAD_STATE"; 906 case BFD_MACH_O_i386_FLOAT_STATE: return "i386_FLOAT_STATE"; 907 case BFD_MACH_O_i386_ISA_PORT_MAP_STATE: return "i386_ISA_PORT_MAP_STATE"; 908 case BFD_MACH_O_i386_V86_ASSIST_STATE: return "i386_V86_ASSIST_STATE"; 909 case BFD_MACH_O_i386_REGS_SEGS_STATE: return "i386_REGS_SEGS_STATE"; 910 case BFD_MACH_O_i386_THREAD_SYSCALL_STATE: return "i386_THREAD_SYSCALL_STATE"; 911 case BFD_MACH_O_i386_THREAD_STATE_NONE: return "i386_THREAD_STATE_NONE"; 912 case BFD_MACH_O_i386_SAVED_STATE: return "i386_SAVED_STATE"; 913 case BFD_MACH_O_i386_THREAD_STATE: return "i386_THREAD_STATE"; 914 case BFD_MACH_O_i386_THREAD_FPSTATE: return "i386_THREAD_FPSTATE"; 915 case BFD_MACH_O_i386_THREAD_EXCEPTSTATE: return "i386_THREAD_EXCEPTSTATE"; 916 case BFD_MACH_O_i386_THREAD_CTHREADSTATE: return "i386_THREAD_CTHREADSTATE"; 917 default: return "UNKNOWN"; 918 } 919} 920 921static const char * 922bfd_mach_o_ppc_flavour_string (unsigned int flavour) 923{ 924 switch ((int) flavour) 925 { 926 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE"; 927 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE"; 928 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE"; 929 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE"; 930 default: return "UNKNOWN"; 931 } 932} 933 934static int 935bfd_mach_o_scan_read_dylinker (bfd *abfd, 936 bfd_mach_o_load_command *command) 937{ 938 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 939 unsigned char buf[4]; 940 unsigned int nameoff; 941 asection *bfdsec; 942 char *sname; 943 const char *prefix; 944 945 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER) 946 || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER)); 947 948 bfd_seek (abfd, command->offset + 8, SEEK_SET); 949 if (bfd_bread ((PTR) buf, 4, abfd) != 4) 950 return -1; 951 952 nameoff = bfd_h_get_32 (abfd, buf + 0); 953 954 cmd->name_offset = command->offset + nameoff; 955 cmd->name_len = command->len - nameoff; 956 957 if (command->type == BFD_MACH_O_LC_LOAD_DYLINKER) 958 prefix = "LC_LOAD_DYLINKER"; 959 else if (command->type == BFD_MACH_O_LC_ID_DYLINKER) 960 prefix = "LC_ID_DYLINKER"; 961 else 962 abort (); 963 964 sname = bfd_alloc (abfd, strlen (prefix) + 1); 965 if (sname == NULL) 966 return -1; 967 strcpy (sname, prefix); 968 969 bfdsec = bfd_make_section_anyway (abfd, sname); 970 if (bfdsec == NULL) 971 return -1; 972 973 bfdsec->vma = 0; 974 bfdsec->lma = 0; 975 bfdsec->size = command->len - 8; 976 bfdsec->filepos = command->offset + 8; 977 bfdsec->alignment_power = 0; 978 bfdsec->flags = SEC_HAS_CONTENTS; 979 980 cmd->section = bfdsec; 981 982 return 0; 983} 984 985static int 986bfd_mach_o_scan_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) 987{ 988 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 989 unsigned char buf[16]; 990 unsigned int nameoff; 991 asection *bfdsec; 992 char *sname; 993 const char *prefix; 994 995 BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLIB) 996 || (command->type == BFD_MACH_O_LC_LOAD_DYLIB) 997 || (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB)); 998 999 bfd_seek (abfd, command->offset + 8, SEEK_SET); 1000 if (bfd_bread ((PTR) buf, 16, abfd) != 16) 1001 return -1; 1002 1003 nameoff = bfd_h_get_32 (abfd, buf + 0); 1004 cmd->timestamp = bfd_h_get_32 (abfd, buf + 4); 1005 cmd->current_version = bfd_h_get_32 (abfd, buf + 8); 1006 cmd->compatibility_version = bfd_h_get_32 (abfd, buf + 12); 1007 1008 cmd->name_offset = command->offset + nameoff; 1009 cmd->name_len = command->len - nameoff; 1010 1011 if (command->type == BFD_MACH_O_LC_LOAD_DYLIB) 1012 prefix = "LC_LOAD_DYLIB"; 1013 else if (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB) 1014 prefix = "LC_LOAD_WEAK_DYLIB"; 1015 else if (command->type == BFD_MACH_O_LC_ID_DYLIB) 1016 prefix = "LC_ID_DYLIB"; 1017 else 1018 abort (); 1019 1020 sname = bfd_alloc (abfd, strlen (prefix) + 1); 1021 if (sname == NULL) 1022 return -1; 1023 strcpy (sname, prefix); 1024 1025 bfdsec = bfd_make_section_anyway (abfd, sname); 1026 if (bfdsec == NULL) 1027 return -1; 1028 1029 bfdsec->vma = 0; 1030 bfdsec->lma = 0; 1031 bfdsec->size = command->len - 8; 1032 bfdsec->filepos = command->offset + 8; 1033 bfdsec->alignment_power = 0; 1034 bfdsec->flags = SEC_HAS_CONTENTS; 1035 1036 cmd->section = bfdsec; 1037 1038 return 0; 1039} 1040 1041static int 1042bfd_mach_o_scan_read_prebound_dylib (bfd *abfd ATTRIBUTE_UNUSED, 1043 bfd_mach_o_load_command *command ATTRIBUTE_UNUSED) 1044{ 1045 /* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */ 1046 1047 BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB); 1048 return 0; 1049} 1050 1051static int 1052bfd_mach_o_scan_read_thread (bfd *abfd, bfd_mach_o_load_command *command) 1053{ 1054 bfd_mach_o_data_struct *mdata = NULL; 1055 bfd_mach_o_thread_command *cmd = &command->command.thread; 1056 unsigned char buf[8]; 1057 bfd_vma offset; 1058 unsigned int nflavours; 1059 unsigned int i; 1060 1061 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 1062 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 1063 1064 BFD_ASSERT (bfd_mach_o_valid (abfd)); 1065 mdata = abfd->tdata.mach_o_data; 1066 1067 offset = 8; 1068 nflavours = 0; 1069 while (offset != command->len) 1070 { 1071 if (offset >= command->len) 1072 return -1; 1073 1074 bfd_seek (abfd, command->offset + offset, SEEK_SET); 1075 1076 if (bfd_bread ((PTR) buf, 8, abfd) != 8) 1077 return -1; 1078 1079 offset += 8 + bfd_h_get_32 (abfd, buf + 4) * 4; 1080 nflavours++; 1081 } 1082 1083 cmd->flavours = bfd_alloc (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour)); 1084 if (cmd->flavours == NULL) 1085 return -1; 1086 cmd->nflavours = nflavours; 1087 1088 offset = 8; 1089 nflavours = 0; 1090 while (offset != command->len) 1091 { 1092 if (offset >= command->len) 1093 return -1; 1094 1095 if (nflavours >= cmd->nflavours) 1096 return -1; 1097 1098 bfd_seek (abfd, command->offset + offset, SEEK_SET); 1099 1100 if (bfd_bread ((PTR) buf, 8, abfd) != 8) 1101 return -1; 1102 1103 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, buf); 1104 cmd->flavours[nflavours].offset = command->offset + offset + 8; 1105 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, buf + 4) * 4; 1106 offset += cmd->flavours[nflavours].size + 8; 1107 nflavours++; 1108 } 1109 1110 for (i = 0; i < nflavours; i++) 1111 { 1112 asection *bfdsec; 1113 unsigned int snamelen; 1114 char *sname; 1115 const char *flavourstr; 1116 const char *prefix = "LC_THREAD"; 1117 unsigned int j = 0; 1118 1119 switch (mdata->header.cputype) 1120 { 1121 case BFD_MACH_O_CPU_TYPE_POWERPC: 1122 flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); 1123 break; 1124 case BFD_MACH_O_CPU_TYPE_I386: 1125 flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour); 1126 break; 1127 default: 1128 flavourstr = "UNKNOWN_ARCHITECTURE"; 1129 break; 1130 } 1131 1132 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1; 1133 sname = bfd_alloc (abfd, snamelen); 1134 if (sname == NULL) 1135 return -1; 1136 1137 for (;;) 1138 { 1139 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); 1140 if (bfd_get_section_by_name (abfd, sname) == NULL) 1141 break; 1142 j++; 1143 } 1144 1145 bfdsec = bfd_make_section (abfd, sname); 1146 1147 bfdsec->vma = 0; 1148 bfdsec->lma = 0; 1149 bfdsec->size = cmd->flavours[i].size; 1150 bfdsec->filepos = cmd->flavours[i].offset; 1151 bfdsec->alignment_power = 0x0; 1152 bfdsec->flags = SEC_HAS_CONTENTS; 1153 1154 cmd->section = bfdsec; 1155 } 1156 1157 return 0; 1158} 1159 1160static int 1161bfd_mach_o_scan_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 1162{ 1163 bfd_mach_o_dysymtab_command *seg = &command->command.dysymtab; 1164 unsigned char buf[72]; 1165 1166 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 1167 1168 bfd_seek (abfd, command->offset + 8, SEEK_SET); 1169 if (bfd_bread ((PTR) buf, 72, abfd) != 72) 1170 return -1; 1171 1172 seg->ilocalsym = bfd_h_get_32 (abfd, buf + 0); 1173 seg->nlocalsym = bfd_h_get_32 (abfd, buf + 4); 1174 seg->iextdefsym = bfd_h_get_32 (abfd, buf + 8); 1175 seg->nextdefsym = bfd_h_get_32 (abfd, buf + 12); 1176 seg->iundefsym = bfd_h_get_32 (abfd, buf + 16); 1177 seg->nundefsym = bfd_h_get_32 (abfd, buf + 20); 1178 seg->tocoff = bfd_h_get_32 (abfd, buf + 24); 1179 seg->ntoc = bfd_h_get_32 (abfd, buf + 28); 1180 seg->modtaboff = bfd_h_get_32 (abfd, buf + 32); 1181 seg->nmodtab = bfd_h_get_32 (abfd, buf + 36); 1182 seg->extrefsymoff = bfd_h_get_32 (abfd, buf + 40); 1183 seg->nextrefsyms = bfd_h_get_32 (abfd, buf + 44); 1184 seg->indirectsymoff = bfd_h_get_32 (abfd, buf + 48); 1185 seg->nindirectsyms = bfd_h_get_32 (abfd, buf + 52); 1186 seg->extreloff = bfd_h_get_32 (abfd, buf + 56); 1187 seg->nextrel = bfd_h_get_32 (abfd, buf + 60); 1188 seg->locreloff = bfd_h_get_32 (abfd, buf + 64); 1189 seg->nlocrel = bfd_h_get_32 (abfd, buf + 68); 1190 1191 return 0; 1192} 1193 1194static int 1195bfd_mach_o_scan_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) 1196{ 1197 bfd_mach_o_symtab_command *seg = &command->command.symtab; 1198 unsigned char buf[16]; 1199 asection *bfdsec; 1200 char *sname; 1201 const char *prefix = "LC_SYMTAB.stabs"; 1202 1203 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 1204 1205 bfd_seek (abfd, command->offset + 8, SEEK_SET); 1206 if (bfd_bread ((PTR) buf, 16, abfd) != 16) 1207 return -1; 1208 1209 seg->symoff = bfd_h_get_32 (abfd, buf); 1210 seg->nsyms = bfd_h_get_32 (abfd, buf + 4); 1211 seg->stroff = bfd_h_get_32 (abfd, buf + 8); 1212 seg->strsize = bfd_h_get_32 (abfd, buf + 12); 1213 seg->symbols = NULL; 1214 seg->strtab = NULL; 1215 1216 sname = bfd_alloc (abfd, strlen (prefix) + 1); 1217 if (sname == NULL) 1218 return -1; 1219 strcpy (sname, prefix); 1220 1221 bfdsec = bfd_make_section_anyway (abfd, sname); 1222 if (bfdsec == NULL) 1223 return -1; 1224 1225 bfdsec->vma = 0; 1226 bfdsec->lma = 0; 1227 bfdsec->size = seg->nsyms * 12; 1228 bfdsec->filepos = seg->symoff; 1229 bfdsec->alignment_power = 0; 1230 bfdsec->flags = SEC_HAS_CONTENTS; 1231 1232 seg->stabs_segment = bfdsec; 1233 1234 prefix = "LC_SYMTAB.stabstr"; 1235 sname = bfd_alloc (abfd, strlen (prefix) + 1); 1236 if (sname == NULL) 1237 return -1; 1238 strcpy (sname, prefix); 1239 1240 bfdsec = bfd_make_section_anyway (abfd, sname); 1241 if (bfdsec == NULL) 1242 return -1; 1243 1244 bfdsec->vma = 0; 1245 bfdsec->lma = 0; 1246 bfdsec->size = seg->strsize; 1247 bfdsec->filepos = seg->stroff; 1248 bfdsec->alignment_power = 0; 1249 bfdsec->flags = SEC_HAS_CONTENTS; 1250 1251 seg->stabstr_segment = bfdsec; 1252 1253 return 0; 1254} 1255 1256static int 1257bfd_mach_o_scan_read_segment (bfd *abfd, bfd_mach_o_load_command *command) 1258{ 1259 unsigned char buf[48]; 1260 bfd_mach_o_segment_command *seg = &command->command.segment; 1261 unsigned long i; 1262 asection *bfdsec; 1263 char *sname; 1264 const char *prefix = "LC_SEGMENT"; 1265 unsigned int snamelen; 1266 1267 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 1268 1269 bfd_seek (abfd, command->offset + 8, SEEK_SET); 1270 if (bfd_bread ((PTR) buf, 48, abfd) != 48) 1271 return -1; 1272 1273 memcpy (seg->segname, buf, 16); 1274 seg->vmaddr = bfd_h_get_32 (abfd, buf + 16); 1275 seg->vmsize = bfd_h_get_32 (abfd, buf + 20); 1276 seg->fileoff = bfd_h_get_32 (abfd, buf + 24); 1277 seg->filesize = bfd_h_get_32 (abfd, buf + 28); 1278 /* seg->maxprot = bfd_h_get_32 (abfd, buf + 32); */ 1279 /* seg->initprot = bfd_h_get_32 (abfd, buf + 36); */ 1280 seg->nsects = bfd_h_get_32 (abfd, buf + 40); 1281 seg->flags = bfd_h_get_32 (abfd, buf + 44); 1282 1283 snamelen = strlen (prefix) + 1 + strlen (seg->segname) + 1; 1284 sname = bfd_alloc (abfd, snamelen); 1285 if (sname == NULL) 1286 return -1; 1287 sprintf (sname, "%s.%s", prefix, seg->segname); 1288 1289 bfdsec = bfd_make_section_anyway (abfd, sname); 1290 if (bfdsec == NULL) 1291 return -1; 1292 1293 bfdsec->vma = seg->vmaddr; 1294 bfdsec->lma = seg->vmaddr; 1295 bfdsec->size = seg->filesize; 1296 bfdsec->filepos = seg->fileoff; 1297 bfdsec->alignment_power = 0x0; 1298 bfdsec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE; 1299 1300 seg->segment = bfdsec; 1301 1302 if (seg->nsects != 0) 1303 { 1304 seg->sections = bfd_alloc (abfd, seg->nsects * sizeof (bfd_mach_o_section)); 1305 if (seg->sections == NULL) 1306 return -1; 1307 1308 for (i = 0; i < seg->nsects; i++) 1309 { 1310 bfd_vma segoff = command->offset + 48 + 8 + (i * 68); 1311 1312 if (bfd_mach_o_scan_read_section (abfd, &seg->sections[i], 1313 segoff) != 0) 1314 return -1; 1315 } 1316 } 1317 1318 return 0; 1319} 1320 1321static int 1322bfd_mach_o_scan_read_command (bfd *abfd, bfd_mach_o_load_command *command) 1323{ 1324 unsigned char buf[8]; 1325 1326 bfd_seek (abfd, command->offset, SEEK_SET); 1327 if (bfd_bread ((PTR) buf, 8, abfd) != 8) 1328 return -1; 1329 1330 command->type = (bfd_h_get_32 (abfd, buf) & ~BFD_MACH_O_LC_REQ_DYLD); 1331 command->type_required = (bfd_h_get_32 (abfd, buf) & BFD_MACH_O_LC_REQ_DYLD 1332 ? 1 : 0); 1333 command->len = bfd_h_get_32 (abfd, buf + 4); 1334 1335 switch (command->type) 1336 { 1337 case BFD_MACH_O_LC_SEGMENT: 1338 if (bfd_mach_o_scan_read_segment (abfd, command) != 0) 1339 return -1; 1340 break; 1341 case BFD_MACH_O_LC_SYMTAB: 1342 if (bfd_mach_o_scan_read_symtab (abfd, command) != 0) 1343 return -1; 1344 break; 1345 case BFD_MACH_O_LC_SYMSEG: 1346 break; 1347 case BFD_MACH_O_LC_THREAD: 1348 case BFD_MACH_O_LC_UNIXTHREAD: 1349 if (bfd_mach_o_scan_read_thread (abfd, command) != 0) 1350 return -1; 1351 break; 1352 case BFD_MACH_O_LC_LOAD_DYLINKER: 1353 case BFD_MACH_O_LC_ID_DYLINKER: 1354 if (bfd_mach_o_scan_read_dylinker (abfd, command) != 0) 1355 return -1; 1356 break; 1357 case BFD_MACH_O_LC_LOAD_DYLIB: 1358 case BFD_MACH_O_LC_ID_DYLIB: 1359 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 1360 if (bfd_mach_o_scan_read_dylib (abfd, command) != 0) 1361 return -1; 1362 break; 1363 case BFD_MACH_O_LC_PREBOUND_DYLIB: 1364 if (bfd_mach_o_scan_read_prebound_dylib (abfd, command) != 0) 1365 return -1; 1366 break; 1367 case BFD_MACH_O_LC_LOADFVMLIB: 1368 case BFD_MACH_O_LC_IDFVMLIB: 1369 case BFD_MACH_O_LC_IDENT: 1370 case BFD_MACH_O_LC_FVMFILE: 1371 case BFD_MACH_O_LC_PREPAGE: 1372 case BFD_MACH_O_LC_ROUTINES: 1373 case BFD_MACH_O_LC_SUB_FRAMEWORK: 1374 break; 1375 case BFD_MACH_O_LC_DYSYMTAB: 1376 if (bfd_mach_o_scan_read_dysymtab (abfd, command) != 0) 1377 return -1; 1378 break; 1379 case BFD_MACH_O_LC_SUB_UMBRELLA: 1380 case BFD_MACH_O_LC_SUB_CLIENT: 1381 case BFD_MACH_O_LC_SUB_LIBRARY: 1382 case BFD_MACH_O_LC_TWOLEVEL_HINTS: 1383 case BFD_MACH_O_LC_PREBIND_CKSUM: 1384 break; 1385 default: 1386 fprintf (stderr, "unable to read unknown load command 0x%lx\n", 1387 (unsigned long) command->type); 1388 break; 1389 } 1390 1391 return 0; 1392} 1393 1394static void 1395bfd_mach_o_flatten_sections (bfd *abfd) 1396{ 1397 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 1398 long csect = 0; 1399 unsigned long i, j; 1400 1401 mdata->nsects = 0; 1402 1403 for (i = 0; i < mdata->header.ncmds; i++) 1404 { 1405 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT) 1406 { 1407 bfd_mach_o_segment_command *seg; 1408 1409 seg = &mdata->commands[i].command.segment; 1410 mdata->nsects += seg->nsects; 1411 } 1412 } 1413 1414 mdata->sections = bfd_alloc (abfd, 1415 mdata->nsects * sizeof (bfd_mach_o_section *)); 1416 csect = 0; 1417 1418 for (i = 0; i < mdata->header.ncmds; i++) 1419 { 1420 if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT) 1421 { 1422 bfd_mach_o_segment_command *seg; 1423 1424 seg = &mdata->commands[i].command.segment; 1425 BFD_ASSERT (csect + seg->nsects <= mdata->nsects); 1426 1427 for (j = 0; j < seg->nsects; j++) 1428 mdata->sections[csect++] = &seg->sections[j]; 1429 } 1430 } 1431} 1432 1433int 1434bfd_mach_o_scan_start_address (bfd *abfd) 1435{ 1436 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 1437 bfd_mach_o_thread_command *cmd = NULL; 1438 unsigned long i; 1439 1440 for (i = 0; i < mdata->header.ncmds; i++) 1441 { 1442 if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) || 1443 (mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD)) 1444 { 1445 if (cmd == NULL) 1446 cmd = &mdata->commands[i].command.thread; 1447 else 1448 return 0; 1449 } 1450 } 1451 1452 if (cmd == NULL) 1453 return 0; 1454 1455 for (i = 0; i < cmd->nflavours; i++) 1456 { 1457 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386) 1458 && (cmd->flavours[i].flavour 1459 == (unsigned long) BFD_MACH_O_i386_THREAD_STATE)) 1460 { 1461 unsigned char buf[4]; 1462 1463 bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET); 1464 1465 if (bfd_bread (buf, 4, abfd) != 4) 1466 return -1; 1467 1468 abfd->start_address = bfd_h_get_32 (abfd, buf); 1469 } 1470 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC) 1471 && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE)) 1472 { 1473 unsigned char buf[4]; 1474 1475 bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET); 1476 1477 if (bfd_bread (buf, 4, abfd) != 4) 1478 return -1; 1479 1480 abfd->start_address = bfd_h_get_32 (abfd, buf); 1481 } 1482 } 1483 1484 return 0; 1485} 1486 1487int 1488bfd_mach_o_scan (bfd *abfd, 1489 bfd_mach_o_header *header, 1490 bfd_mach_o_data_struct *mdata) 1491{ 1492 unsigned int i; 1493 enum bfd_architecture cputype; 1494 unsigned long cpusubtype; 1495 1496 mdata->header = *header; 1497 mdata->symbols = NULL; 1498 1499 abfd->flags = (abfd->xvec->object_flags 1500 | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS))); 1501 abfd->tdata.mach_o_data = mdata; 1502 1503 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, 1504 &cputype, &cpusubtype); 1505 if (cputype == bfd_arch_unknown) 1506 { 1507 fprintf (stderr, "bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx\n", 1508 header->cputype, header->cpusubtype); 1509 return -1; 1510 } 1511 1512 bfd_set_arch_mach (abfd, cputype, cpusubtype); 1513 1514 if (header->ncmds != 0) 1515 { 1516 mdata->commands = bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command)); 1517 if (mdata->commands == NULL) 1518 return -1; 1519 1520 for (i = 0; i < header->ncmds; i++) 1521 { 1522 bfd_mach_o_load_command *cur = &mdata->commands[i]; 1523 1524 if (i == 0) 1525 cur->offset = 28; 1526 else 1527 { 1528 bfd_mach_o_load_command *prev = &mdata->commands[i - 1]; 1529 cur->offset = prev->offset + prev->len; 1530 } 1531 1532 if (bfd_mach_o_scan_read_command (abfd, cur) < 0) 1533 return -1; 1534 } 1535 } 1536 1537 if (bfd_mach_o_scan_start_address (abfd) < 0) 1538 return -1; 1539 1540 bfd_mach_o_flatten_sections (abfd); 1541 return 0; 1542} 1543 1544bfd_boolean 1545bfd_mach_o_mkobject (bfd *abfd) 1546{ 1547 bfd_mach_o_data_struct *mdata = NULL; 1548 1549 mdata = bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct)); 1550 if (mdata == NULL) 1551 return FALSE; 1552 abfd->tdata.mach_o_data = mdata; 1553 1554 mdata->header.magic = 0; 1555 mdata->header.cputype = 0; 1556 mdata->header.cpusubtype = 0; 1557 mdata->header.filetype = 0; 1558 mdata->header.ncmds = 0; 1559 mdata->header.sizeofcmds = 0; 1560 mdata->header.flags = 0; 1561 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN; 1562 mdata->commands = NULL; 1563 mdata->nsymbols = 0; 1564 mdata->symbols = NULL; 1565 mdata->nsects = 0; 1566 mdata->sections = NULL; 1567 mdata->ibfd = NULL; 1568 1569 return TRUE; 1570} 1571 1572const bfd_target * 1573bfd_mach_o_object_p (bfd *abfd) 1574{ 1575 struct bfd_preserve preserve; 1576 bfd_mach_o_header header; 1577 1578 preserve.marker = NULL; 1579 if (bfd_mach_o_read_header (abfd, &header) != 0) 1580 goto wrong; 1581 1582 if (! (header.byteorder == BFD_ENDIAN_BIG 1583 || header.byteorder == BFD_ENDIAN_LITTLE)) 1584 { 1585 fprintf (stderr, "unknown header byte-order value 0x%lx\n", 1586 (long) header.byteorder); 1587 goto wrong; 1588 } 1589 1590 if (! ((header.byteorder == BFD_ENDIAN_BIG 1591 && abfd->xvec->byteorder == BFD_ENDIAN_BIG 1592 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) 1593 || (header.byteorder == BFD_ENDIAN_LITTLE 1594 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE 1595 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) 1596 goto wrong; 1597 1598 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); 1599 if (preserve.marker == NULL 1600 || !bfd_preserve_save (abfd, &preserve)) 1601 goto fail; 1602 1603 if (bfd_mach_o_scan (abfd, &header, 1604 (bfd_mach_o_data_struct *) preserve.marker) != 0) 1605 goto wrong; 1606 1607 bfd_preserve_finish (abfd, &preserve); 1608 return abfd->xvec; 1609 1610 wrong: 1611 bfd_set_error (bfd_error_wrong_format); 1612 1613 fail: 1614 if (preserve.marker != NULL) 1615 bfd_preserve_restore (abfd, &preserve); 1616 return NULL; 1617} 1618 1619const bfd_target * 1620bfd_mach_o_core_p (bfd *abfd) 1621{ 1622 struct bfd_preserve preserve; 1623 bfd_mach_o_header header; 1624 1625 preserve.marker = NULL; 1626 if (bfd_mach_o_read_header (abfd, &header) != 0) 1627 goto wrong; 1628 1629 if (! (header.byteorder == BFD_ENDIAN_BIG 1630 || header.byteorder == BFD_ENDIAN_LITTLE)) 1631 { 1632 fprintf (stderr, "unknown header byte-order value 0x%lx\n", 1633 (long) header.byteorder); 1634 abort (); 1635 } 1636 1637 if (! ((header.byteorder == BFD_ENDIAN_BIG 1638 && abfd->xvec->byteorder == BFD_ENDIAN_BIG 1639 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) 1640 || (header.byteorder == BFD_ENDIAN_LITTLE 1641 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE 1642 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) 1643 goto wrong; 1644 1645 if (header.filetype != BFD_MACH_O_MH_CORE) 1646 goto wrong; 1647 1648 preserve.marker = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); 1649 if (preserve.marker == NULL 1650 || !bfd_preserve_save (abfd, &preserve)) 1651 goto fail; 1652 1653 if (bfd_mach_o_scan (abfd, &header, 1654 (bfd_mach_o_data_struct *) preserve.marker) != 0) 1655 goto wrong; 1656 1657 bfd_preserve_finish (abfd, &preserve); 1658 return abfd->xvec; 1659 1660 wrong: 1661 bfd_set_error (bfd_error_wrong_format); 1662 1663 fail: 1664 if (preserve.marker != NULL) 1665 bfd_preserve_restore (abfd, &preserve); 1666 return NULL; 1667} 1668 1669typedef struct mach_o_fat_archentry 1670{ 1671 unsigned long cputype; 1672 unsigned long cpusubtype; 1673 unsigned long offset; 1674 unsigned long size; 1675 unsigned long align; 1676 bfd *abfd; 1677} mach_o_fat_archentry; 1678 1679typedef struct mach_o_fat_data_struct 1680{ 1681 unsigned long magic; 1682 unsigned long nfat_arch; 1683 mach_o_fat_archentry *archentries; 1684} mach_o_fat_data_struct; 1685 1686const bfd_target * 1687bfd_mach_o_archive_p (bfd *abfd) 1688{ 1689 mach_o_fat_data_struct *adata = NULL; 1690 unsigned char buf[20]; 1691 unsigned long i; 1692 1693 bfd_seek (abfd, 0, SEEK_SET); 1694 if (bfd_bread ((PTR) buf, 8, abfd) != 8) 1695 goto error; 1696 1697 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); 1698 if (adata == NULL) 1699 goto error; 1700 1701 adata->magic = bfd_getb32 (buf); 1702 adata->nfat_arch = bfd_getb32 (buf + 4); 1703 if (adata->magic != 0xcafebabe) 1704 goto error; 1705 1706 adata->archentries = 1707 bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry)); 1708 if (adata->archentries == NULL) 1709 goto error; 1710 1711 for (i = 0; i < adata->nfat_arch; i++) 1712 { 1713 bfd_seek (abfd, 8 + 20 * i, SEEK_SET); 1714 1715 if (bfd_bread ((PTR) buf, 20, abfd) != 20) 1716 goto error; 1717 adata->archentries[i].cputype = bfd_getb32 (buf); 1718 adata->archentries[i].cpusubtype = bfd_getb32 (buf + 4); 1719 adata->archentries[i].offset = bfd_getb32 (buf + 8); 1720 adata->archentries[i].size = bfd_getb32 (buf + 12); 1721 adata->archentries[i].align = bfd_getb32 (buf + 16); 1722 adata->archentries[i].abfd = NULL; 1723 } 1724 1725 abfd->tdata.mach_o_fat_data = adata; 1726 return abfd->xvec; 1727 1728 error: 1729 if (adata != NULL) 1730 bfd_release (abfd, adata); 1731 bfd_set_error (bfd_error_wrong_format); 1732 return NULL; 1733} 1734 1735bfd * 1736bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev) 1737{ 1738 mach_o_fat_data_struct *adata; 1739 mach_o_fat_archentry *entry = NULL; 1740 unsigned long i; 1741 1742 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; 1743 BFD_ASSERT (adata != NULL); 1744 1745 /* Find index of previous entry. */ 1746 if (prev == NULL) 1747 i = 0; /* Start at first one. */ 1748 else 1749 { 1750 for (i = 0; i < adata->nfat_arch; i++) 1751 { 1752 if (adata->archentries[i].abfd == prev) 1753 break; 1754 } 1755 1756 if (i == adata->nfat_arch) 1757 { 1758 /* Not found. */ 1759 bfd_set_error (bfd_error_bad_value); 1760 return NULL; 1761 } 1762 i++; /* Get next entry. */ 1763 } 1764 1765 if (i >= adata->nfat_arch) 1766 { 1767 bfd_set_error (bfd_error_no_more_archived_files); 1768 return NULL; 1769 } 1770 1771 entry = &adata->archentries[i]; 1772 if (entry->abfd == NULL) 1773 { 1774 bfd *nbfd = _bfd_new_bfd_contained_in (archive); 1775 char *s = NULL; 1776 1777 if (nbfd == NULL) 1778 return NULL; 1779 1780 nbfd->origin = entry->offset; 1781 s = bfd_malloc (strlen (archive->filename) + 1); 1782 if (s == NULL) 1783 return NULL; 1784 strcpy (s, archive->filename); 1785 nbfd->filename = s; 1786 nbfd->iostream = NULL; 1787 entry->abfd = nbfd; 1788 } 1789 1790 return entry->abfd; 1791} 1792 1793int 1794bfd_mach_o_lookup_section (bfd *abfd, 1795 asection *section, 1796 bfd_mach_o_load_command **mcommand, 1797 bfd_mach_o_section **msection) 1798{ 1799 struct mach_o_data_struct *md = abfd->tdata.mach_o_data; 1800 unsigned int i, j, num; 1801 1802 bfd_mach_o_load_command *ncmd = NULL; 1803 bfd_mach_o_section *nsect = NULL; 1804 1805 BFD_ASSERT (mcommand != NULL); 1806 BFD_ASSERT (msection != NULL); 1807 1808 num = 0; 1809 for (i = 0; i < md->header.ncmds; i++) 1810 { 1811 struct bfd_mach_o_load_command *cmd = &md->commands[i]; 1812 struct bfd_mach_o_segment_command *seg = NULL; 1813 1814 if (cmd->type != BFD_MACH_O_LC_SEGMENT) 1815 continue; 1816 seg = &cmd->command.segment; 1817 1818 if (seg->segment == section) 1819 { 1820 if (num == 0) 1821 ncmd = cmd; 1822 num++; 1823 } 1824 1825 for (j = 0; j < seg->nsects; j++) 1826 { 1827 struct bfd_mach_o_section *sect = &seg->sections[j]; 1828 1829 if (sect->bfdsection == section) 1830 { 1831 if (num == 0) 1832 nsect = sect; 1833 num++; 1834 } 1835 } 1836 } 1837 1838 *mcommand = ncmd; 1839 *msection = nsect; 1840 return num; 1841} 1842 1843int 1844bfd_mach_o_lookup_command (bfd *abfd, 1845 bfd_mach_o_load_command_type type, 1846 bfd_mach_o_load_command **mcommand) 1847{ 1848 struct mach_o_data_struct *md = NULL; 1849 bfd_mach_o_load_command *ncmd = NULL; 1850 unsigned int i, num; 1851 1852 md = abfd->tdata.mach_o_data; 1853 1854 BFD_ASSERT (md != NULL); 1855 BFD_ASSERT (mcommand != NULL); 1856 1857 num = 0; 1858 for (i = 0; i < md->header.ncmds; i++) 1859 { 1860 struct bfd_mach_o_load_command *cmd = &md->commands[i]; 1861 1862 if (cmd->type != type) 1863 continue; 1864 1865 if (num == 0) 1866 ncmd = cmd; 1867 num++; 1868 } 1869 1870 *mcommand = ncmd; 1871 return num; 1872} 1873 1874unsigned long 1875bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type) 1876{ 1877 switch (type) 1878 { 1879 case BFD_MACH_O_CPU_TYPE_MC680x0: 1880 return 0x04000000; 1881 case BFD_MACH_O_CPU_TYPE_MC88000: 1882 return 0xffffe000; 1883 case BFD_MACH_O_CPU_TYPE_POWERPC: 1884 return 0xc0000000; 1885 case BFD_MACH_O_CPU_TYPE_I386: 1886 return 0xc0000000; 1887 case BFD_MACH_O_CPU_TYPE_SPARC: 1888 return 0xf0000000; 1889 case BFD_MACH_O_CPU_TYPE_I860: 1890 return 0; 1891 case BFD_MACH_O_CPU_TYPE_HPPA: 1892 return 0xc0000000 - 0x04000000; 1893 default: 1894 return 0; 1895 } 1896} 1897 1898int 1899bfd_mach_o_core_fetch_environment (bfd *abfd, 1900 unsigned char **rbuf, 1901 unsigned int *rlen) 1902{ 1903 bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data; 1904 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype); 1905 unsigned int i = 0; 1906 1907 for (i = 0; i < mdata->header.ncmds; i++) 1908 { 1909 bfd_mach_o_load_command *cur = &mdata->commands[i]; 1910 bfd_mach_o_segment_command *seg = NULL; 1911 1912 if (cur->type != BFD_MACH_O_LC_SEGMENT) 1913 continue; 1914 1915 seg = &cur->command.segment; 1916 1917 if ((seg->vmaddr + seg->vmsize) == stackaddr) 1918 { 1919 unsigned long start = seg->fileoff; 1920 unsigned long end = seg->fileoff + seg->filesize; 1921 unsigned char *buf = bfd_malloc (1024); 1922 unsigned long size = 1024; 1923 1924 for (;;) 1925 { 1926 bfd_size_type nread = 0; 1927 unsigned long offset; 1928 int found_nonnull = 0; 1929 1930 if (size > (end - start)) 1931 size = (end - start); 1932 1933 buf = bfd_realloc (buf, size); 1934 1935 bfd_seek (abfd, end - size, SEEK_SET); 1936 nread = bfd_bread (buf, size, abfd); 1937 1938 if (nread != size) 1939 return -1; 1940 1941 for (offset = 4; offset <= size; offset += 4) 1942 { 1943 unsigned long val; 1944 1945 val = *((unsigned long *) (buf + size - offset)); 1946 if (! found_nonnull) 1947 { 1948 if (val != 0) 1949 found_nonnull = 1; 1950 } 1951 else if (val == 0x0) 1952 { 1953 unsigned long bottom; 1954 unsigned long top; 1955 1956 bottom = seg->fileoff + seg->filesize - offset; 1957 top = seg->fileoff + seg->filesize - 4; 1958 *rbuf = bfd_malloc (top - bottom); 1959 *rlen = top - bottom; 1960 1961 memcpy (*rbuf, buf + size - *rlen, *rlen); 1962 return 0; 1963 } 1964 } 1965 1966 if (size == (end - start)) 1967 break; 1968 1969 size *= 2; 1970 } 1971 } 1972 } 1973 1974 return -1; 1975} 1976 1977char * 1978bfd_mach_o_core_file_failing_command (bfd *abfd) 1979{ 1980 unsigned char *buf = NULL; 1981 unsigned int len = 0; 1982 int ret = -1; 1983 1984 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len); 1985 if (ret < 0) 1986 return NULL; 1987 1988 return (char *) buf; 1989} 1990 1991int 1992bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 1993{ 1994 return 0; 1995} 1996 1997#define TARGET_NAME mach_o_be_vec 1998#define TARGET_STRING "mach-o-be" 1999#define TARGET_BIG_ENDIAN 1 2000#define TARGET_ARCHIVE 0 2001 2002#include "mach-o-target.c" 2003 2004#undef TARGET_NAME 2005#undef TARGET_STRING 2006#undef TARGET_BIG_ENDIAN 2007#undef TARGET_ARCHIVE 2008 2009#define TARGET_NAME mach_o_le_vec 2010#define TARGET_STRING "mach-o-le" 2011#define TARGET_BIG_ENDIAN 0 2012#define TARGET_ARCHIVE 0 2013 2014#include "mach-o-target.c" 2015 2016#undef TARGET_NAME 2017#undef TARGET_STRING 2018#undef TARGET_BIG_ENDIAN 2019#undef TARGET_ARCHIVE 2020 2021#define TARGET_NAME mach_o_fat_vec 2022#define TARGET_STRING "mach-o-fat" 2023#define TARGET_BIG_ENDIAN 1 2024#define TARGET_ARCHIVE 1 2025 2026#include "mach-o-target.c" 2027 2028#undef TARGET_NAME 2029#undef TARGET_STRING 2030#undef TARGET_BIG_ENDIAN 2031#undef TARGET_ARCHIVE 2032