1 /* Mach-O support for BFD. 2 Copyright (C) 1999-2017 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "mach-o.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "libiberty.h" 26 #include "aout/stab_gnu.h" 27 #include "mach-o/reloc.h" 28 #include "mach-o/external.h" 29 #include <ctype.h> 30 #include <stdlib.h> 31 #include <string.h> 32 33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p 34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p 35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject 36 37 #define FILE_ALIGN(off, algn) \ 38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn))) 39 40 static bfd_boolean 41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd); 42 43 unsigned int 44 bfd_mach_o_version (bfd *abfd) 45 { 46 bfd_mach_o_data_struct *mdata = NULL; 47 48 BFD_ASSERT (bfd_mach_o_valid (abfd)); 49 mdata = bfd_mach_o_get_data (abfd); 50 51 return mdata->header.version; 52 } 53 54 bfd_boolean 55 bfd_mach_o_valid (bfd *abfd) 56 { 57 if (abfd == NULL || abfd->xvec == NULL) 58 return FALSE; 59 60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour) 61 return FALSE; 62 63 if (bfd_mach_o_get_data (abfd) == NULL) 64 return FALSE; 65 return TRUE; 66 } 67 68 static INLINE bfd_boolean 69 mach_o_wide_p (bfd_mach_o_header *header) 70 { 71 switch (header->version) 72 { 73 case 1: 74 return FALSE; 75 case 2: 76 return TRUE; 77 default: 78 BFD_FAIL (); 79 return FALSE; 80 } 81 } 82 83 static INLINE bfd_boolean 84 bfd_mach_o_wide_p (bfd *abfd) 85 { 86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header); 87 } 88 89 /* Tables to translate well known Mach-O segment/section names to bfd 90 names. Use of canonical names (such as .text or .debug_frame) is required 91 by gdb. */ 92 93 /* __TEXT Segment. */ 94 static const mach_o_section_name_xlat text_section_names_xlat[] = 95 { 96 { ".text", "__text", 97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0}, 99 { ".const", "__const", 100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 101 BFD_MACH_O_S_ATTR_NONE, 0}, 102 { ".static_const", "__static_const", 103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 104 BFD_MACH_O_S_ATTR_NONE, 0}, 105 { ".cstring", "__cstring", 106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS, 107 BFD_MACH_O_S_CSTRING_LITERALS, 108 BFD_MACH_O_S_ATTR_NONE, 0}, 109 { ".literal4", "__literal4", 110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS, 111 BFD_MACH_O_S_ATTR_NONE, 2}, 112 { ".literal8", "__literal8", 113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS, 114 BFD_MACH_O_S_ATTR_NONE, 3}, 115 { ".literal16", "__literal16", 116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS, 117 BFD_MACH_O_S_ATTR_NONE, 4}, 118 { ".constructor", "__constructor", 119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 120 BFD_MACH_O_S_ATTR_NONE, 0}, 121 { ".destructor", "__destructor", 122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 123 BFD_MACH_O_S_ATTR_NONE, 0}, 124 { ".eh_frame", "__eh_frame", 125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, 126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT 127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS 128 | BFD_MACH_O_S_ATTR_NO_TOC, 2}, 129 { NULL, NULL, 0, 0, 0, 0} 130 }; 131 132 /* __DATA Segment. */ 133 static const mach_o_section_name_xlat data_section_names_xlat[] = 134 { 135 { ".data", "__data", 136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 137 BFD_MACH_O_S_ATTR_NONE, 0}, 138 { ".bss", "__bss", 139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL, 140 BFD_MACH_O_S_ATTR_NONE, 0}, 141 { ".const_data", "__const", 142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 143 BFD_MACH_O_S_ATTR_NONE, 0}, 144 { ".static_data", "__static_data", 145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 146 BFD_MACH_O_S_ATTR_NONE, 0}, 147 { ".mod_init_func", "__mod_init_func", 148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS, 149 BFD_MACH_O_S_ATTR_NONE, 2}, 150 { ".mod_term_func", "__mod_term_func", 151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS, 152 BFD_MACH_O_S_ATTR_NONE, 2}, 153 { ".dyld", "__dyld", 154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 155 BFD_MACH_O_S_ATTR_NONE, 0}, 156 { ".cfstring", "__cfstring", 157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 158 BFD_MACH_O_S_ATTR_NONE, 2}, 159 { NULL, NULL, 0, 0, 0, 0} 160 }; 161 162 /* __DWARF Segment. */ 163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] = 164 { 165 { ".debug_frame", "__debug_frame", 166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 167 BFD_MACH_O_S_ATTR_DEBUG, 0}, 168 { ".debug_info", "__debug_info", 169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 170 BFD_MACH_O_S_ATTR_DEBUG, 0}, 171 { ".debug_abbrev", "__debug_abbrev", 172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 173 BFD_MACH_O_S_ATTR_DEBUG, 0}, 174 { ".debug_aranges", "__debug_aranges", 175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 176 BFD_MACH_O_S_ATTR_DEBUG, 0}, 177 { ".debug_macinfo", "__debug_macinfo", 178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 179 BFD_MACH_O_S_ATTR_DEBUG, 0}, 180 { ".debug_line", "__debug_line", 181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 182 BFD_MACH_O_S_ATTR_DEBUG, 0}, 183 { ".debug_loc", "__debug_loc", 184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 185 BFD_MACH_O_S_ATTR_DEBUG, 0}, 186 { ".debug_pubnames", "__debug_pubnames", 187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 188 BFD_MACH_O_S_ATTR_DEBUG, 0}, 189 { ".debug_pubtypes", "__debug_pubtypes", 190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 191 BFD_MACH_O_S_ATTR_DEBUG, 0}, 192 { ".debug_str", "__debug_str", 193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 194 BFD_MACH_O_S_ATTR_DEBUG, 0}, 195 { ".debug_ranges", "__debug_ranges", 196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 197 BFD_MACH_O_S_ATTR_DEBUG, 0}, 198 { ".debug_macro", "__debug_macro", 199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 200 BFD_MACH_O_S_ATTR_DEBUG, 0}, 201 { ".debug_gdb_scripts", "__debug_gdb_scri", 202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 203 BFD_MACH_O_S_ATTR_DEBUG, 0}, 204 { NULL, NULL, 0, 0, 0, 0} 205 }; 206 207 /* __OBJC Segment. */ 208 static const mach_o_section_name_xlat objc_section_names_xlat[] = 209 { 210 { ".objc_class", "__class", 211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 213 { ".objc_meta_class", "__meta_class", 214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 216 { ".objc_cat_cls_meth", "__cat_cls_meth", 217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 219 { ".objc_cat_inst_meth", "__cat_inst_meth", 220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 222 { ".objc_protocol", "__protocol", 223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 225 { ".objc_string_object", "__string_object", 226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 228 { ".objc_cls_meth", "__cls_meth", 229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 231 { ".objc_inst_meth", "__inst_meth", 232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 234 { ".objc_cls_refs", "__cls_refs", 235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, 236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 237 { ".objc_message_refs", "__message_refs", 238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, 239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 240 { ".objc_symbols", "__symbols", 241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 243 { ".objc_category", "__category", 244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 246 { ".objc_class_vars", "__class_vars", 247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 249 { ".objc_instance_vars", "__instance_vars", 250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 252 { ".objc_module_info", "__module_info", 253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 255 { ".objc_selector_strs", "__selector_strs", 256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS, 257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 258 { ".objc_image_info", "__image_info", 259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 261 { ".objc_selector_fixup", "__sel_fixup", 262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 264 /* Objc V1 */ 265 { ".objc1_class_ext", "__class_ext", 266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 268 { ".objc1_property_list", "__property", 269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 271 { ".objc1_protocol_ext", "__protocol_ext", 272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 274 { NULL, NULL, 0, 0, 0, 0} 275 }; 276 277 static const mach_o_segment_name_xlat segsec_names_xlat[] = 278 { 279 { "__TEXT", text_section_names_xlat }, 280 { "__DATA", data_section_names_xlat }, 281 { "__DWARF", dwarf_section_names_xlat }, 282 { "__OBJC", objc_section_names_xlat }, 283 { NULL, NULL } 284 }; 285 286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF"; 287 288 /* For both cases bfd-name => mach-o name and vice versa, the specific target 289 is checked before the generic. This allows a target (e.g. ppc for cstring) 290 to override the generic definition with a more specific one. */ 291 292 /* Fetch the translation from a Mach-O section designation (segment, section) 293 as a bfd short name, if one exists. Otherwise return NULL. 294 295 Allow the segment and section names to be unterminated 16 byte arrays. */ 296 297 const mach_o_section_name_xlat * 298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname, 299 const char *sectname) 300 { 301 const struct mach_o_segment_name_xlat *seg; 302 const mach_o_section_name_xlat *sec; 303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 304 305 /* First try any target-specific translations defined... */ 306 if (bed->segsec_names_xlat) 307 for (seg = bed->segsec_names_xlat; seg->segname; seg++) 308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) 309 for (sec = seg->sections; sec->mach_o_name; sec++) 310 if (strncmp (sec->mach_o_name, sectname, 311 BFD_MACH_O_SECTNAME_SIZE) == 0) 312 return sec; 313 314 /* ... and then the Mach-O generic ones. */ 315 for (seg = segsec_names_xlat; seg->segname; seg++) 316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) 317 for (sec = seg->sections; sec->mach_o_name; sec++) 318 if (strncmp (sec->mach_o_name, sectname, 319 BFD_MACH_O_SECTNAME_SIZE) == 0) 320 return sec; 321 322 return NULL; 323 } 324 325 /* If the bfd_name for this section is a 'canonical' form for which we 326 know the Mach-O data, return the segment name and the data for the 327 Mach-O equivalent. Otherwise return NULL. */ 328 329 const mach_o_section_name_xlat * 330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name, 331 const char **segname) 332 { 333 const struct mach_o_segment_name_xlat *seg; 334 const mach_o_section_name_xlat *sec; 335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 336 *segname = NULL; 337 338 if (bfd_name[0] != '.') 339 return NULL; 340 341 /* First try any target-specific translations defined... */ 342 if (bed->segsec_names_xlat) 343 for (seg = bed->segsec_names_xlat; seg->segname; seg++) 344 for (sec = seg->sections; sec->bfd_name; sec++) 345 if (strcmp (bfd_name, sec->bfd_name) == 0) 346 { 347 *segname = seg->segname; 348 return sec; 349 } 350 351 /* ... and then the Mach-O generic ones. */ 352 for (seg = segsec_names_xlat; seg->segname; seg++) 353 for (sec = seg->sections; sec->bfd_name; sec++) 354 if (strcmp (bfd_name, sec->bfd_name) == 0) 355 { 356 *segname = seg->segname; 357 return sec; 358 } 359 360 return NULL; 361 } 362 363 /* Convert Mach-O section name to BFD. 364 365 Try to use standard/canonical names, for which we have tables including 366 default flag settings - which are returned. Otherwise forge a new name 367 in the form "<segmentname>.<sectionname>" this will be prefixed with 368 LC_SEGMENT. if the segment name does not begin with an underscore. 369 370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL- 371 terminated if the name length is exactly 16 bytes - but must be if the name 372 length is less than 16 characters). */ 373 374 void 375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname, 376 const char *secname, const char **name, 377 flagword *flags) 378 { 379 const mach_o_section_name_xlat *xlat; 380 char *res; 381 unsigned int len; 382 const char *pfx = ""; 383 384 *name = NULL; 385 *flags = SEC_NO_FLAGS; 386 387 /* First search for a canonical name... 388 xlat will be non-null if there is an entry for segname, secname. */ 389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname); 390 if (xlat) 391 { 392 len = strlen (xlat->bfd_name); 393 res = bfd_alloc (abfd, len + 1); 394 if (res == NULL) 395 return; 396 memcpy (res, xlat->bfd_name, len+1); 397 *name = res; 398 *flags = xlat->bfd_flags; 399 return; 400 } 401 402 /* ... else we make up a bfd name from the segment concatenated with the 403 section. */ 404 405 len = 16 + 1 + 16 + 1; 406 407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start 408 with an underscore. */ 409 if (segname[0] != '_') 410 { 411 static const char seg_pfx[] = "LC_SEGMENT."; 412 413 pfx = seg_pfx; 414 len += sizeof (seg_pfx) - 1; 415 } 416 417 res = bfd_alloc (abfd, len); 418 if (res == NULL) 419 return; 420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname); 421 *name = res; 422 } 423 424 /* Convert a bfd section name to a Mach-O segment + section name. 425 426 If the name is a canonical one for which we have a Darwin match 427 return the translation table - which contains defaults for flags, 428 type, attribute and default alignment data. 429 430 Otherwise, expand the bfd_name (assumed to be in the form 431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */ 432 433 static const mach_o_section_name_xlat * 434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED, 435 asection *sect, 436 bfd_mach_o_section *section) 437 { 438 const mach_o_section_name_xlat *xlat; 439 const char *name = bfd_get_section_name (abfd, sect); 440 const char *segname; 441 const char *dot; 442 unsigned int len; 443 unsigned int seglen; 444 unsigned int seclen; 445 446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1); 447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1); 448 449 /* See if is a canonical name ... */ 450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname); 451 if (xlat) 452 { 453 strcpy (section->segname, segname); 454 strcpy (section->sectname, xlat->mach_o_name); 455 return xlat; 456 } 457 458 /* .. else we convert our constructed one back to Mach-O. 459 Strip LC_SEGMENT. prefix, if present. */ 460 if (strncmp (name, "LC_SEGMENT.", 11) == 0) 461 name += 11; 462 463 /* Find a dot. */ 464 dot = strchr (name, '.'); 465 len = strlen (name); 466 467 /* Try to split name into segment and section names. */ 468 if (dot && dot != name) 469 { 470 seglen = dot - name; 471 seclen = len - (dot + 1 - name); 472 473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE 474 && seclen <= BFD_MACH_O_SECTNAME_SIZE) 475 { 476 memcpy (section->segname, name, seglen); 477 section->segname[seglen] = 0; 478 memcpy (section->sectname, dot + 1, seclen); 479 section->sectname[seclen] = 0; 480 return NULL; 481 } 482 } 483 484 /* The segment and section names are both missing - don't make them 485 into dots. */ 486 if (dot && dot == name) 487 return NULL; 488 489 /* Just duplicate the name into both segment and section. */ 490 if (len > 16) 491 len = 16; 492 memcpy (section->segname, name, len); 493 section->segname[len] = 0; 494 memcpy (section->sectname, name, len); 495 section->sectname[len] = 0; 496 return NULL; 497 } 498 499 /* Return the size of an entry for section SEC. 500 Must be called only for symbol pointer section and symbol stubs 501 sections. */ 502 503 unsigned int 504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec) 505 { 506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 507 { 508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 510 return bfd_mach_o_wide_p (abfd) ? 8 : 4; 511 case BFD_MACH_O_S_SYMBOL_STUBS: 512 return sec->reserved2; 513 default: 514 BFD_FAIL (); 515 return 0; 516 } 517 } 518 519 /* Return the number of indirect symbols for a section. 520 Must be called only for symbol pointer section and symbol stubs 521 sections. */ 522 523 unsigned int 524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec) 525 { 526 unsigned int elsz; 527 528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec); 529 if (elsz == 0) 530 return 0; 531 else 532 return sec->size / elsz; 533 } 534 535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */ 536 537 static void 538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd) 539 { 540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 541 542 if (mdata->last_command != NULL) 543 mdata->last_command->next = cmd; 544 else 545 mdata->first_command = cmd; 546 mdata->last_command = cmd; 547 cmd->next = NULL; 548 } 549 550 /* Copy any private info we understand from the input symbol 551 to the output symbol. */ 552 553 bfd_boolean 554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, 555 asymbol *isymbol, 556 bfd *obfd ATTRIBUTE_UNUSED, 557 asymbol *osymbol) 558 { 559 bfd_mach_o_asymbol *os, *is; 560 561 os = (bfd_mach_o_asymbol *)osymbol; 562 is = (bfd_mach_o_asymbol *)isymbol; 563 os->n_type = is->n_type; 564 os->n_sect = is->n_sect; 565 os->n_desc = is->n_desc; 566 os->symbol.udata.i = is->symbol.udata.i; 567 568 return TRUE; 569 } 570 571 /* Copy any private info we understand from the input section 572 to the output section. */ 573 574 bfd_boolean 575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection, 576 bfd *obfd, asection *osection) 577 { 578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection); 579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection); 580 581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour 582 || obfd->xvec->flavour != bfd_target_mach_o_flavour) 583 return TRUE; 584 585 BFD_ASSERT (is != NULL && os != NULL); 586 587 os->flags = is->flags; 588 os->reserved1 = is->reserved1; 589 os->reserved2 = is->reserved2; 590 os->reserved3 = is->reserved3; 591 592 return TRUE; 593 } 594 595 /* Copy any private info we understand from the input bfd 596 to the output bfd. */ 597 598 bfd_boolean 599 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd) 600 { 601 bfd_mach_o_data_struct *imdata; 602 bfd_mach_o_data_struct *omdata; 603 bfd_mach_o_load_command *icmd; 604 605 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour 606 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour) 607 return TRUE; 608 609 BFD_ASSERT (bfd_mach_o_valid (ibfd)); 610 BFD_ASSERT (bfd_mach_o_valid (obfd)); 611 612 imdata = bfd_mach_o_get_data (ibfd); 613 omdata = bfd_mach_o_get_data (obfd); 614 615 /* Copy header flags. */ 616 omdata->header.flags = imdata->header.flags; 617 618 /* Copy commands. */ 619 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next) 620 { 621 bfd_mach_o_load_command *ocmd; 622 623 switch (icmd->type) 624 { 625 case BFD_MACH_O_LC_LOAD_DYLIB: 626 case BFD_MACH_O_LC_LOAD_DYLINKER: 627 case BFD_MACH_O_LC_DYLD_INFO: 628 /* Command is copied. */ 629 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command)); 630 if (ocmd == NULL) 631 return FALSE; 632 633 /* Copy common fields. */ 634 ocmd->type = icmd->type; 635 ocmd->type_required = icmd->type_required; 636 ocmd->offset = 0; 637 ocmd->len = icmd->len; 638 break; 639 640 default: 641 /* Command is not copied. */ 642 continue; 643 break; 644 } 645 646 switch (icmd->type) 647 { 648 case BFD_MACH_O_LC_LOAD_DYLIB: 649 { 650 bfd_mach_o_dylib_command *idy = &icmd->command.dylib; 651 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib; 652 653 ody->name_offset = idy->name_offset; 654 ody->timestamp = idy->timestamp; 655 ody->current_version = idy->current_version; 656 ody->compatibility_version = idy->compatibility_version; 657 ody->name_str = idy->name_str; 658 } 659 break; 660 661 case BFD_MACH_O_LC_LOAD_DYLINKER: 662 { 663 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker; 664 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker; 665 666 ody->name_offset = idy->name_offset; 667 ody->name_str = idy->name_str; 668 } 669 break; 670 671 case BFD_MACH_O_LC_DYLD_INFO: 672 { 673 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info; 674 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info; 675 676 if (bfd_mach_o_read_dyld_content (ibfd, idy)) 677 { 678 ody->rebase_size = idy->rebase_size; 679 ody->rebase_content = idy->rebase_content; 680 681 ody->bind_size = idy->bind_size; 682 ody->bind_content = idy->bind_content; 683 684 ody->weak_bind_size = idy->weak_bind_size; 685 ody->weak_bind_content = idy->weak_bind_content; 686 687 ody->lazy_bind_size = idy->lazy_bind_size; 688 ody->lazy_bind_content = idy->lazy_bind_content; 689 690 ody->export_size = idy->export_size; 691 ody->export_content = idy->export_content; 692 } 693 /* PR 17512L: file: 730e492d. */ 694 else 695 { 696 ody->rebase_size = 697 ody->bind_size = 698 ody->weak_bind_size = 699 ody->lazy_bind_size = 700 ody->export_size = 0; 701 ody->rebase_content = 702 ody->bind_content = 703 ody->weak_bind_content = 704 ody->lazy_bind_content = 705 ody->export_content = NULL; 706 } 707 } 708 break; 709 710 default: 711 /* That command should be handled. */ 712 abort (); 713 } 714 715 /* Insert command. */ 716 bfd_mach_o_append_command (obfd, ocmd); 717 } 718 719 return TRUE; 720 } 721 722 /* This allows us to set up to 32 bits of flags (unless we invent some 723 fiendish scheme to subdivide). For now, we'll just set the file flags 724 without error checking - just overwrite. */ 725 726 bfd_boolean 727 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags) 728 { 729 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 730 731 if (!mdata) 732 return FALSE; 733 734 mdata->header.flags = flags; 735 return TRUE; 736 } 737 738 /* Count the total number of symbols. */ 739 740 static long 741 bfd_mach_o_count_symbols (bfd *abfd) 742 { 743 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 744 745 if (mdata->symtab == NULL) 746 return 0; 747 return mdata->symtab->nsyms; 748 } 749 750 long 751 bfd_mach_o_get_symtab_upper_bound (bfd *abfd) 752 { 753 long nsyms = bfd_mach_o_count_symbols (abfd); 754 755 return ((nsyms + 1) * sizeof (asymbol *)); 756 } 757 758 long 759 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation) 760 { 761 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 762 long nsyms = bfd_mach_o_count_symbols (abfd); 763 bfd_mach_o_symtab_command *sym = mdata->symtab; 764 unsigned long j; 765 766 if (nsyms < 0) 767 return nsyms; 768 769 if (nsyms == 0) 770 { 771 /* Do not try to read symbols if there are none. */ 772 alocation[0] = NULL; 773 return 0; 774 } 775 776 if (!bfd_mach_o_read_symtab_symbols (abfd)) 777 { 778 _bfd_error_handler 779 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols")); 780 return 0; 781 } 782 783 BFD_ASSERT (sym->symbols != NULL); 784 785 for (j = 0; j < sym->nsyms; j++) 786 alocation[j] = &sym->symbols[j].symbol; 787 788 alocation[j] = NULL; 789 790 return nsyms; 791 } 792 793 /* Create synthetic symbols for indirect symbols. */ 794 795 long 796 bfd_mach_o_get_synthetic_symtab (bfd *abfd, 797 long symcount ATTRIBUTE_UNUSED, 798 asymbol **syms ATTRIBUTE_UNUSED, 799 long dynsymcount ATTRIBUTE_UNUSED, 800 asymbol **dynsyms ATTRIBUTE_UNUSED, 801 asymbol **ret) 802 { 803 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 804 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; 805 bfd_mach_o_symtab_command *symtab = mdata->symtab; 806 asymbol *s; 807 char * s_start; 808 char * s_end; 809 unsigned long count, i, j, n; 810 size_t size; 811 char *names; 812 char *nul_name; 813 const char stub [] = "$stub"; 814 815 *ret = NULL; 816 817 /* Stop now if no symbols or no indirect symbols. */ 818 if (dysymtab == NULL || dysymtab->nindirectsyms == 0 819 || symtab == NULL || symtab->symbols == NULL) 820 return 0; 821 822 /* We need to allocate a bfd symbol for every indirect symbol and to 823 allocate the memory for its name. */ 824 count = dysymtab->nindirectsyms; 825 size = count * sizeof (asymbol) + 1; 826 827 for (j = 0; j < count; j++) 828 { 829 const char * strng; 830 unsigned int isym = dysymtab->indirect_syms[j]; 831 832 /* Some indirect symbols are anonymous. */ 833 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name)) 834 /* PR 17512: file: f5b8eeba. */ 835 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub); 836 } 837 838 s_start = bfd_malloc (size); 839 s = *ret = (asymbol *) s_start; 840 if (s == NULL) 841 return -1; 842 names = (char *) (s + count); 843 nul_name = names; 844 *names++ = 0; 845 s_end = s_start + size; 846 847 n = 0; 848 for (i = 0; i < mdata->nsects; i++) 849 { 850 bfd_mach_o_section *sec = mdata->sections[i]; 851 unsigned int first, last; 852 bfd_vma addr; 853 bfd_vma entry_size; 854 855 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 856 { 857 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 858 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 859 case BFD_MACH_O_S_SYMBOL_STUBS: 860 /* Only these sections have indirect symbols. */ 861 first = sec->reserved1; 862 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec); 863 addr = sec->addr; 864 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec); 865 866 /* PR 17512: file: 08e15eec. */ 867 if (first >= count || last >= count || first > last) 868 goto fail; 869 870 for (j = first; j < last; j++) 871 { 872 unsigned int isym = dysymtab->indirect_syms[j]; 873 874 /* PR 17512: file: 04d64d9b. */ 875 if (((char *) s) + sizeof (* s) > s_end) 876 goto fail; 877 878 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 879 s->section = sec->bfdsection; 880 s->value = addr - sec->addr; 881 s->udata.p = NULL; 882 883 if (isym < symtab->nsyms 884 && symtab->symbols[isym].symbol.name) 885 { 886 const char *sym = symtab->symbols[isym].symbol.name; 887 size_t len; 888 889 s->name = names; 890 len = strlen (sym); 891 /* PR 17512: file: 47dfd4d2. */ 892 if (names + len >= s_end) 893 goto fail; 894 memcpy (names, sym, len); 895 names += len; 896 /* PR 17512: file: 18f340a4. */ 897 if (names + sizeof (stub) >= s_end) 898 goto fail; 899 memcpy (names, stub, sizeof (stub)); 900 names += sizeof (stub); 901 } 902 else 903 s->name = nul_name; 904 905 addr += entry_size; 906 s++; 907 n++; 908 } 909 break; 910 default: 911 break; 912 } 913 } 914 915 return n; 916 917 fail: 918 free (s_start); 919 * ret = NULL; 920 return -1; 921 } 922 923 void 924 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, 925 asymbol *symbol, 926 symbol_info *ret) 927 { 928 bfd_symbol_info (symbol, ret); 929 } 930 931 void 932 bfd_mach_o_print_symbol (bfd *abfd, 933 void * afile, 934 asymbol *symbol, 935 bfd_print_symbol_type how) 936 { 937 FILE *file = (FILE *) afile; 938 const char *name; 939 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol; 940 941 switch (how) 942 { 943 case bfd_print_symbol_name: 944 fprintf (file, "%s", symbol->name); 945 break; 946 default: 947 bfd_print_symbol_vandf (abfd, (void *) file, symbol); 948 if (asym->n_type & BFD_MACH_O_N_STAB) 949 name = bfd_get_stab_name (asym->n_type); 950 else 951 switch (asym->n_type & BFD_MACH_O_N_TYPE) 952 { 953 case BFD_MACH_O_N_UNDF: 954 if (symbol->value == 0) 955 name = "UND"; 956 else 957 name = "COM"; 958 break; 959 case BFD_MACH_O_N_ABS: 960 name = "ABS"; 961 break; 962 case BFD_MACH_O_N_INDR: 963 name = "INDR"; 964 break; 965 case BFD_MACH_O_N_PBUD: 966 name = "PBUD"; 967 break; 968 case BFD_MACH_O_N_SECT: 969 name = "SECT"; 970 break; 971 default: 972 name = "???"; 973 break; 974 } 975 if (name == NULL) 976 name = ""; 977 fprintf (file, " %02x %-6s %02x %04x", 978 asym->n_type, name, asym->n_sect, asym->n_desc); 979 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0 980 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) 981 fprintf (file, " [%s]", symbol->section->name); 982 fprintf (file, " %s", symbol->name); 983 } 984 } 985 986 static void 987 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype, 988 bfd_mach_o_cpu_subtype msubtype, 989 enum bfd_architecture *type, 990 unsigned long *subtype) 991 { 992 *subtype = bfd_arch_unknown; 993 994 switch (mtype) 995 { 996 case BFD_MACH_O_CPU_TYPE_VAX: 997 *type = bfd_arch_vax; 998 break; 999 case BFD_MACH_O_CPU_TYPE_MC680x0: 1000 *type = bfd_arch_m68k; 1001 break; 1002 case BFD_MACH_O_CPU_TYPE_I386: 1003 *type = bfd_arch_i386; 1004 *subtype = bfd_mach_i386_i386; 1005 break; 1006 case BFD_MACH_O_CPU_TYPE_X86_64: 1007 *type = bfd_arch_i386; 1008 *subtype = bfd_mach_x86_64; 1009 break; 1010 case BFD_MACH_O_CPU_TYPE_MIPS: 1011 *type = bfd_arch_mips; 1012 break; 1013 case BFD_MACH_O_CPU_TYPE_MC98000: 1014 *type = bfd_arch_m98k; 1015 break; 1016 case BFD_MACH_O_CPU_TYPE_HPPA: 1017 *type = bfd_arch_hppa; 1018 break; 1019 case BFD_MACH_O_CPU_TYPE_ARM: 1020 *type = bfd_arch_arm; 1021 switch (msubtype) 1022 { 1023 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T: 1024 *subtype = bfd_mach_arm_4T; 1025 break; 1026 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6: 1027 *subtype = bfd_mach_arm_4T; /* Best fit ? */ 1028 break; 1029 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ: 1030 *subtype = bfd_mach_arm_5TE; 1031 break; 1032 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE: 1033 *subtype = bfd_mach_arm_XScale; 1034 break; 1035 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7: 1036 *subtype = bfd_mach_arm_5TE; /* Best fit ? */ 1037 break; 1038 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL: 1039 default: 1040 break; 1041 } 1042 break; 1043 case BFD_MACH_O_CPU_TYPE_MC88000: 1044 *type = bfd_arch_m88k; 1045 break; 1046 case BFD_MACH_O_CPU_TYPE_SPARC: 1047 *type = bfd_arch_sparc; 1048 *subtype = bfd_mach_sparc; 1049 break; 1050 case BFD_MACH_O_CPU_TYPE_I860: 1051 *type = bfd_arch_i860; 1052 break; 1053 case BFD_MACH_O_CPU_TYPE_ALPHA: 1054 *type = bfd_arch_alpha; 1055 break; 1056 case BFD_MACH_O_CPU_TYPE_POWERPC: 1057 *type = bfd_arch_powerpc; 1058 *subtype = bfd_mach_ppc; 1059 break; 1060 case BFD_MACH_O_CPU_TYPE_POWERPC_64: 1061 *type = bfd_arch_powerpc; 1062 *subtype = bfd_mach_ppc64; 1063 break; 1064 case BFD_MACH_O_CPU_TYPE_ARM64: 1065 *type = bfd_arch_aarch64; 1066 *subtype = bfd_mach_aarch64; 1067 break; 1068 default: 1069 *type = bfd_arch_unknown; 1070 break; 1071 } 1072 } 1073 1074 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the 1075 number of bytes written or -1 in case of error. */ 1076 1077 static int 1078 bfd_mach_o_pad4 (bfd *abfd, unsigned int len) 1079 { 1080 if (len % 4 != 0) 1081 { 1082 char pad[4] = {0,0,0,0}; 1083 unsigned int padlen = 4 - (len % 4); 1084 1085 if (bfd_bwrite (pad, padlen, abfd) != padlen) 1086 return -1; 1087 1088 return padlen; 1089 } 1090 else 1091 return 0; 1092 } 1093 1094 /* Likewise, but for a command. */ 1095 1096 static int 1097 bfd_mach_o_pad_command (bfd *abfd, unsigned int len) 1098 { 1099 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4; 1100 1101 if (len % align != 0) 1102 { 1103 char pad[8] = {0}; 1104 unsigned int padlen = align - (len % align); 1105 1106 if (bfd_bwrite (pad, padlen, abfd) != padlen) 1107 return -1; 1108 1109 return padlen; 1110 } 1111 else 1112 return 0; 1113 } 1114 1115 static bfd_boolean 1116 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header) 1117 { 1118 struct mach_o_header_external raw; 1119 unsigned int size; 1120 1121 size = mach_o_wide_p (header) ? 1122 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 1123 1124 bfd_h_put_32 (abfd, header->magic, raw.magic); 1125 bfd_h_put_32 (abfd, header->cputype, raw.cputype); 1126 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype); 1127 bfd_h_put_32 (abfd, header->filetype, raw.filetype); 1128 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds); 1129 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds); 1130 bfd_h_put_32 (abfd, header->flags, raw.flags); 1131 1132 if (mach_o_wide_p (header)) 1133 bfd_h_put_32 (abfd, header->reserved, raw.reserved); 1134 1135 if (bfd_seek (abfd, 0, SEEK_SET) != 0 1136 || bfd_bwrite (&raw, size, abfd) != size) 1137 return FALSE; 1138 1139 return TRUE; 1140 } 1141 1142 static bfd_boolean 1143 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command) 1144 { 1145 bfd_mach_o_thread_command *cmd = &command->command.thread; 1146 unsigned int i; 1147 struct mach_o_thread_command_external raw; 1148 unsigned int offset; 1149 1150 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 1151 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 1152 1153 offset = BFD_MACH_O_LC_SIZE; 1154 for (i = 0; i < cmd->nflavours; i++) 1155 { 1156 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0); 1157 BFD_ASSERT (cmd->flavours[i].offset == 1158 (command->offset + offset + BFD_MACH_O_LC_SIZE)); 1159 1160 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour); 1161 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count); 1162 1163 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 1164 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1165 return FALSE; 1166 1167 offset += cmd->flavours[i].size + sizeof (raw); 1168 } 1169 1170 return TRUE; 1171 } 1172 1173 static bfd_boolean 1174 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command) 1175 { 1176 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 1177 struct mach_o_str_command_external raw; 1178 unsigned int namelen; 1179 1180 bfd_h_put_32 (abfd, cmd->name_offset, raw.str); 1181 1182 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1183 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1184 return FALSE; 1185 1186 namelen = strlen (cmd->name_str) + 1; 1187 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) 1188 return FALSE; 1189 1190 if (bfd_mach_o_pad_command (abfd, namelen) < 0) 1191 return FALSE; 1192 1193 return TRUE; 1194 } 1195 1196 static bfd_boolean 1197 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command) 1198 { 1199 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 1200 struct mach_o_dylib_command_external raw; 1201 unsigned int namelen; 1202 1203 bfd_h_put_32 (abfd, cmd->name_offset, raw.name); 1204 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp); 1205 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version); 1206 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version); 1207 1208 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1209 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1210 return FALSE; 1211 1212 namelen = strlen (cmd->name_str) + 1; 1213 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) 1214 return FALSE; 1215 1216 if (bfd_mach_o_pad_command (abfd, namelen) < 0) 1217 return FALSE; 1218 1219 return TRUE; 1220 } 1221 1222 static bfd_boolean 1223 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command) 1224 { 1225 bfd_mach_o_main_command *cmd = &command->command.main; 1226 struct mach_o_entry_point_command_external raw; 1227 1228 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff); 1229 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize); 1230 1231 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1232 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1233 return FALSE; 1234 1235 return TRUE; 1236 } 1237 1238 static bfd_boolean 1239 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) 1240 { 1241 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; 1242 struct mach_o_dyld_info_command_external raw; 1243 1244 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off); 1245 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size); 1246 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off); 1247 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size); 1248 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off); 1249 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size); 1250 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off); 1251 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size); 1252 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off); 1253 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size); 1254 1255 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1256 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1257 return FALSE; 1258 1259 if (cmd->rebase_size != 0) 1260 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0 1261 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) != 1262 cmd->rebase_size)) 1263 return FALSE; 1264 1265 if (cmd->bind_size != 0) 1266 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0 1267 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) != 1268 cmd->bind_size)) 1269 return FALSE; 1270 1271 if (cmd->weak_bind_size != 0) 1272 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0 1273 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) != 1274 cmd->weak_bind_size)) 1275 return FALSE; 1276 1277 if (cmd->lazy_bind_size != 0) 1278 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0 1279 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) != 1280 cmd->lazy_bind_size)) 1281 return FALSE; 1282 1283 if (cmd->export_size != 0) 1284 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0 1285 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) != 1286 cmd->export_size)) 1287 return FALSE; 1288 1289 return TRUE; 1290 } 1291 1292 long 1293 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, 1294 asection *asect) 1295 { 1296 return (asect->reloc_count + 1) * sizeof (arelent *); 1297 } 1298 1299 /* In addition to the need to byte-swap the symbol number, the bit positions 1300 of the fields in the relocation information vary per target endian-ness. */ 1301 1302 void 1303 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel, 1304 unsigned char *fields) 1305 { 1306 unsigned char info = fields[3]; 1307 1308 if (bfd_big_endian (abfd)) 1309 { 1310 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2]; 1311 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; 1312 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0; 1313 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT) 1314 & BFD_MACH_O_LENGTH_MASK; 1315 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0; 1316 } 1317 else 1318 { 1319 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0]; 1320 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; 1321 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0; 1322 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT) 1323 & BFD_MACH_O_LENGTH_MASK; 1324 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0; 1325 } 1326 } 1327 1328 /* Set syms_ptr_ptr and addend of RES. */ 1329 1330 bfd_boolean 1331 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd, 1332 bfd_mach_o_reloc_info *reloc, 1333 arelent *res, asymbol **syms) 1334 { 1335 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1336 unsigned int num; 1337 asymbol **sym; 1338 1339 /* Non-scattered relocation. */ 1340 reloc->r_scattered = 0; 1341 res->addend = 0; 1342 1343 num = reloc->r_value; 1344 1345 if (reloc->r_extern) 1346 { 1347 /* PR 17512: file: 8396-1185-0.004. */ 1348 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd)) 1349 sym = bfd_und_section_ptr->symbol_ptr_ptr; 1350 else if (syms == NULL) 1351 sym = bfd_und_section_ptr->symbol_ptr_ptr; 1352 else 1353 /* An external symbol number. */ 1354 sym = syms + num; 1355 } 1356 else if (num == 0x00ffffff || num == 0) 1357 { 1358 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this 1359 is generic code, we don't know wether this is really a PAIR. 1360 This value is almost certainly not a valid section number, hence 1361 this specific case to avoid an assertion failure. 1362 Target specific swap_reloc_in routine should adjust that. */ 1363 sym = bfd_abs_section_ptr->symbol_ptr_ptr; 1364 } 1365 else 1366 { 1367 /* PR 17512: file: 006-2964-0.004. */ 1368 if (num > mdata->nsects) 1369 return FALSE; 1370 1371 /* A section number. */ 1372 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr; 1373 /* For a symbol defined in section S, the addend (stored in the 1374 binary) contains the address of the section. To comply with 1375 bfd convention, subtract the section address. 1376 Use the address from the header, so that the user can modify 1377 the vma of the section. */ 1378 res->addend = -mdata->sections[num - 1]->addr; 1379 } 1380 1381 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset 1382 in the lower 16bits of the address value. So we have to find the 1383 'symbol' from the preceding reloc. We do this even though the 1384 section symbol is probably not needed here, because NULL symbol 1385 values cause an assert in generic BFD code. This must be done in 1386 the PPC swap_reloc_in routine. */ 1387 res->sym_ptr_ptr = sym; 1388 1389 return TRUE; 1390 } 1391 1392 /* Do most of the work for canonicalize_relocs on RAW: create internal 1393 representation RELOC and set most fields of RES using symbol table SYMS. 1394 Each target still has to set the howto of RES and possibly adjust other 1395 fields. 1396 Previously the Mach-O hook point was simply swap_in, but some targets 1397 (like arm64) don't follow the generic rules (symnum is a value for the 1398 non-scattered relocation ADDEND). */ 1399 1400 bfd_boolean 1401 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd, 1402 struct mach_o_reloc_info_external *raw, 1403 bfd_mach_o_reloc_info *reloc, 1404 arelent *res, asymbol **syms) 1405 { 1406 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1407 bfd_vma addr; 1408 1409 addr = bfd_get_32 (abfd, raw->r_address); 1410 res->sym_ptr_ptr = NULL; 1411 res->addend = 0; 1412 1413 if (addr & BFD_MACH_O_SR_SCATTERED) 1414 { 1415 unsigned int j; 1416 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum); 1417 1418 /* Scattered relocation, can't be extern. */ 1419 reloc->r_scattered = 1; 1420 reloc->r_extern = 0; 1421 1422 /* Extract section and offset from r_value (symnum). */ 1423 reloc->r_value = symnum; 1424 /* FIXME: This breaks when a symbol in a reloc exactly follows the 1425 end of the data for the section (e.g. in a calculation of section 1426 data length). At present, the symbol will end up associated with 1427 the following section or, if it falls within alignment padding, as 1428 null - which will assert later. */ 1429 for (j = 0; j < mdata->nsects; j++) 1430 { 1431 bfd_mach_o_section *sect = mdata->sections[j]; 1432 if (symnum >= sect->addr && symnum < sect->addr + sect->size) 1433 { 1434 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr; 1435 res->addend = symnum - sect->addr; 1436 break; 1437 } 1438 } 1439 1440 /* Extract the info and address fields from r_address. */ 1441 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr); 1442 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr); 1443 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL; 1444 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr); 1445 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr); 1446 } 1447 else 1448 { 1449 /* Non-scattered relocation. */ 1450 reloc->r_scattered = 0; 1451 reloc->r_address = addr; 1452 res->address = addr; 1453 1454 /* The value and info fields have to be extracted dependent on target 1455 endian-ness. */ 1456 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum); 1457 1458 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc, 1459 res, syms)) 1460 return FALSE; 1461 } 1462 1463 /* We have set up a reloc with all the information present, so the swapper 1464 can modify address, value and addend fields, if necessary, to convey 1465 information in the generic BFD reloc that is mach-o specific. */ 1466 1467 return TRUE; 1468 } 1469 1470 static int 1471 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos, 1472 unsigned long count, 1473 arelent *res, asymbol **syms) 1474 { 1475 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1476 unsigned long i; 1477 struct mach_o_reloc_info_external *native_relocs; 1478 bfd_size_type native_size; 1479 1480 /* Allocate and read relocs. */ 1481 native_size = count * BFD_MACH_O_RELENT_SIZE; 1482 1483 /* PR 17512: file: 09477b57. */ 1484 if (native_size < count) 1485 return -1; 1486 1487 native_relocs = 1488 (struct mach_o_reloc_info_external *) bfd_malloc (native_size); 1489 if (native_relocs == NULL) 1490 return -1; 1491 1492 if (bfd_seek (abfd, filepos, SEEK_SET) != 0 1493 || bfd_bread (native_relocs, native_size, abfd) != native_size) 1494 goto err; 1495 1496 for (i = 0; i < count; i++) 1497 { 1498 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i], 1499 &res[i], syms)) 1500 goto err; 1501 } 1502 free (native_relocs); 1503 return i; 1504 err: 1505 free (native_relocs); 1506 return -1; 1507 } 1508 1509 long 1510 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect, 1511 arelent **rels, asymbol **syms) 1512 { 1513 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1514 unsigned long i; 1515 arelent *res; 1516 1517 if (asect->reloc_count == 0) 1518 return 0; 1519 1520 /* No need to go further if we don't know how to read relocs. */ 1521 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) 1522 return 0; 1523 1524 if (asect->relocation == NULL) 1525 { 1526 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count) 1527 return -1; 1528 res = bfd_malloc (asect->reloc_count * sizeof (arelent)); 1529 if (res == NULL) 1530 return -1; 1531 1532 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos, 1533 asect->reloc_count, res, syms) < 0) 1534 { 1535 free (res); 1536 return -1; 1537 } 1538 asect->relocation = res; 1539 } 1540 1541 res = asect->relocation; 1542 for (i = 0; i < asect->reloc_count; i++) 1543 rels[i] = &res[i]; 1544 rels[i] = NULL; 1545 1546 return i; 1547 } 1548 1549 long 1550 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd) 1551 { 1552 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1553 1554 if (mdata->dysymtab == NULL) 1555 return 1; 1556 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1) 1557 * sizeof (arelent *); 1558 } 1559 1560 long 1561 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels, 1562 struct bfd_symbol **syms) 1563 { 1564 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1565 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; 1566 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1567 unsigned long i; 1568 arelent *res; 1569 1570 if (dysymtab == NULL) 1571 return 0; 1572 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0) 1573 return 0; 1574 1575 /* No need to go further if we don't know how to read relocs. */ 1576 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) 1577 return 0; 1578 1579 if (mdata->dyn_reloc_cache == NULL) 1580 { 1581 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent) 1582 < (dysymtab->nextrel + dysymtab->nlocrel)) 1583 return -1; 1584 1585 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel) 1586 * sizeof (arelent)); 1587 if (res == NULL) 1588 return -1; 1589 1590 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff, 1591 dysymtab->nextrel, res, syms) < 0) 1592 { 1593 free (res); 1594 return -1; 1595 } 1596 1597 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff, 1598 dysymtab->nlocrel, 1599 res + dysymtab->nextrel, syms) < 0) 1600 { 1601 free (res); 1602 return -1; 1603 } 1604 1605 mdata->dyn_reloc_cache = res; 1606 } 1607 1608 res = mdata->dyn_reloc_cache; 1609 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++) 1610 rels[i] = &res[i]; 1611 rels[i] = NULL; 1612 return i; 1613 } 1614 1615 /* In addition to the need to byte-swap the symbol number, the bit positions 1616 of the fields in the relocation information vary per target endian-ness. */ 1617 1618 static void 1619 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields, 1620 bfd_mach_o_reloc_info *rel) 1621 { 1622 unsigned char info = 0; 1623 1624 BFD_ASSERT (rel->r_type <= 15); 1625 BFD_ASSERT (rel->r_length <= 3); 1626 1627 if (bfd_big_endian (abfd)) 1628 { 1629 fields[0] = (rel->r_value >> 16) & 0xff; 1630 fields[1] = (rel->r_value >> 8) & 0xff; 1631 fields[2] = rel->r_value & 0xff; 1632 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT; 1633 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0; 1634 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT; 1635 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0; 1636 } 1637 else 1638 { 1639 fields[2] = (rel->r_value >> 16) & 0xff; 1640 fields[1] = (rel->r_value >> 8) & 0xff; 1641 fields[0] = rel->r_value & 0xff; 1642 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT; 1643 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0; 1644 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT; 1645 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0; 1646 } 1647 fields[3] = info; 1648 } 1649 1650 static bfd_boolean 1651 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section) 1652 { 1653 unsigned int i; 1654 arelent **entries; 1655 asection *sec; 1656 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1657 1658 sec = section->bfdsection; 1659 if (sec->reloc_count == 0) 1660 return TRUE; 1661 1662 if (bed->_bfd_mach_o_swap_reloc_out == NULL) 1663 return TRUE; 1664 1665 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0) 1666 return FALSE; 1667 1668 /* Convert and write. */ 1669 entries = section->bfdsection->orelocation; 1670 for (i = 0; i < section->nreloc; i++) 1671 { 1672 arelent *rel = entries[i]; 1673 struct mach_o_reloc_info_external raw; 1674 bfd_mach_o_reloc_info info, *pinfo = &info; 1675 1676 /* Convert relocation to an intermediate representation. */ 1677 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo)) 1678 return FALSE; 1679 1680 /* Lower the relocation info. */ 1681 if (pinfo->r_scattered) 1682 { 1683 unsigned long v; 1684 1685 v = BFD_MACH_O_SR_SCATTERED 1686 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0) 1687 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length) 1688 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type) 1689 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address); 1690 /* Note: scattered relocs have field in reverse order... */ 1691 bfd_put_32 (abfd, v, raw.r_address); 1692 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum); 1693 } 1694 else 1695 { 1696 bfd_put_32 (abfd, pinfo->r_address, raw.r_address); 1697 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum, 1698 pinfo); 1699 } 1700 1701 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd) 1702 != BFD_MACH_O_RELENT_SIZE) 1703 return FALSE; 1704 } 1705 return TRUE; 1706 } 1707 1708 static bfd_boolean 1709 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section) 1710 { 1711 struct mach_o_section_32_external raw; 1712 1713 memcpy (raw.sectname, section->sectname, 16); 1714 memcpy (raw.segname, section->segname, 16); 1715 bfd_h_put_32 (abfd, section->addr, raw.addr); 1716 bfd_h_put_32 (abfd, section->size, raw.size); 1717 bfd_h_put_32 (abfd, section->offset, raw.offset); 1718 bfd_h_put_32 (abfd, section->align, raw.align); 1719 bfd_h_put_32 (abfd, section->reloff, raw.reloff); 1720 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); 1721 bfd_h_put_32 (abfd, section->flags, raw.flags); 1722 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); 1723 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); 1724 1725 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd) 1726 != BFD_MACH_O_SECTION_SIZE) 1727 return FALSE; 1728 1729 return TRUE; 1730 } 1731 1732 static bfd_boolean 1733 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section) 1734 { 1735 struct mach_o_section_64_external raw; 1736 1737 memcpy (raw.sectname, section->sectname, 16); 1738 memcpy (raw.segname, section->segname, 16); 1739 bfd_h_put_64 (abfd, section->addr, raw.addr); 1740 bfd_h_put_64 (abfd, section->size, raw.size); 1741 bfd_h_put_32 (abfd, section->offset, raw.offset); 1742 bfd_h_put_32 (abfd, section->align, raw.align); 1743 bfd_h_put_32 (abfd, section->reloff, raw.reloff); 1744 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); 1745 bfd_h_put_32 (abfd, section->flags, raw.flags); 1746 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); 1747 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); 1748 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3); 1749 1750 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) 1751 != BFD_MACH_O_SECTION_64_SIZE) 1752 return FALSE; 1753 1754 return TRUE; 1755 } 1756 1757 static bfd_boolean 1758 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) 1759 { 1760 struct mach_o_segment_command_32_external raw; 1761 bfd_mach_o_segment_command *seg = &command->command.segment; 1762 bfd_mach_o_section *sec; 1763 1764 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 1765 1766 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1767 if (!bfd_mach_o_write_relocs (abfd, sec)) 1768 return FALSE; 1769 1770 memcpy (raw.segname, seg->segname, 16); 1771 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr); 1772 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize); 1773 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff); 1774 bfd_h_put_32 (abfd, seg->filesize, raw.filesize); 1775 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); 1776 bfd_h_put_32 (abfd, seg->initprot, raw.initprot); 1777 bfd_h_put_32 (abfd, seg->nsects, raw.nsects); 1778 bfd_h_put_32 (abfd, seg->flags, raw.flags); 1779 1780 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1781 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1782 return FALSE; 1783 1784 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1785 if (!bfd_mach_o_write_section_32 (abfd, sec)) 1786 return FALSE; 1787 1788 return TRUE; 1789 } 1790 1791 static bfd_boolean 1792 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) 1793 { 1794 struct mach_o_segment_command_64_external raw; 1795 bfd_mach_o_segment_command *seg = &command->command.segment; 1796 bfd_mach_o_section *sec; 1797 1798 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); 1799 1800 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1801 if (!bfd_mach_o_write_relocs (abfd, sec)) 1802 return FALSE; 1803 1804 memcpy (raw.segname, seg->segname, 16); 1805 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr); 1806 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize); 1807 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff); 1808 bfd_h_put_64 (abfd, seg->filesize, raw.filesize); 1809 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); 1810 bfd_h_put_32 (abfd, seg->initprot, raw.initprot); 1811 bfd_h_put_32 (abfd, seg->nsects, raw.nsects); 1812 bfd_h_put_32 (abfd, seg->flags, raw.flags); 1813 1814 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1815 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1816 return FALSE; 1817 1818 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1819 if (!bfd_mach_o_write_section_64 (abfd, sec)) 1820 return FALSE; 1821 1822 return TRUE; 1823 } 1824 1825 static bfd_boolean 1826 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym) 1827 { 1828 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1829 unsigned long i; 1830 unsigned int wide = bfd_mach_o_wide_p (abfd); 1831 struct bfd_strtab_hash *strtab; 1832 asymbol **symbols = bfd_get_outsymbols (abfd); 1833 int padlen; 1834 1835 /* Write the symbols first. */ 1836 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0) 1837 return FALSE; 1838 1839 strtab = _bfd_stringtab_init (); 1840 if (strtab == NULL) 1841 return FALSE; 1842 1843 if (sym->nsyms > 0) 1844 /* Although we don't strictly need to do this, for compatibility with 1845 Darwin system tools, actually output an empty string for the index 1846 0 entry. */ 1847 _bfd_stringtab_add (strtab, "", TRUE, FALSE); 1848 1849 for (i = 0; i < sym->nsyms; i++) 1850 { 1851 bfd_size_type str_index; 1852 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 1853 1854 if (s->symbol.name == 0 || s->symbol.name[0] == '\0') 1855 /* An index of 0 always means the empty string. */ 1856 str_index = 0; 1857 else 1858 { 1859 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE); 1860 1861 if (str_index == (bfd_size_type) -1) 1862 goto err; 1863 } 1864 1865 if (wide) 1866 { 1867 struct mach_o_nlist_64_external raw; 1868 1869 bfd_h_put_32 (abfd, str_index, raw.n_strx); 1870 bfd_h_put_8 (abfd, s->n_type, raw.n_type); 1871 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); 1872 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); 1873 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value, 1874 raw.n_value); 1875 1876 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1877 goto err; 1878 } 1879 else 1880 { 1881 struct mach_o_nlist_external raw; 1882 1883 bfd_h_put_32 (abfd, str_index, raw.n_strx); 1884 bfd_h_put_8 (abfd, s->n_type, raw.n_type); 1885 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); 1886 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); 1887 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value, 1888 raw.n_value); 1889 1890 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1891 goto err; 1892 } 1893 } 1894 sym->strsize = _bfd_stringtab_size (strtab); 1895 sym->stroff = mdata->filelen; 1896 mdata->filelen += sym->strsize; 1897 1898 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0) 1899 goto err; 1900 1901 if (_bfd_stringtab_emit (abfd, strtab) != TRUE) 1902 goto err; 1903 1904 /* Pad string table. */ 1905 padlen = bfd_mach_o_pad4 (abfd, sym->strsize); 1906 if (padlen < 0) 1907 return FALSE; 1908 mdata->filelen += padlen; 1909 sym->strsize += padlen; 1910 1911 return TRUE; 1912 1913 err: 1914 _bfd_stringtab_free (strtab); 1915 sym->strsize = 0; 1916 return FALSE; 1917 } 1918 1919 static bfd_boolean 1920 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command) 1921 { 1922 bfd_mach_o_symtab_command *sym = &command->command.symtab; 1923 struct mach_o_symtab_command_external raw; 1924 1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 1926 1927 /* The command. */ 1928 bfd_h_put_32 (abfd, sym->symoff, raw.symoff); 1929 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms); 1930 bfd_h_put_32 (abfd, sym->stroff, raw.stroff); 1931 bfd_h_put_32 (abfd, sym->strsize, raw.strsize); 1932 1933 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1934 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1935 return FALSE; 1936 1937 return TRUE; 1938 } 1939 1940 /* Count the number of indirect symbols in the image. 1941 Requires that the sections are in their final order. */ 1942 1943 static unsigned int 1944 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata) 1945 { 1946 unsigned int i; 1947 unsigned int nisyms = 0; 1948 1949 for (i = 0; i < mdata->nsects; ++i) 1950 { 1951 bfd_mach_o_section *sec = mdata->sections[i]; 1952 1953 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 1954 { 1955 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 1956 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 1957 case BFD_MACH_O_S_SYMBOL_STUBS: 1958 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec); 1959 break; 1960 default: 1961 break; 1962 } 1963 } 1964 return nisyms; 1965 } 1966 1967 /* Create the dysymtab. */ 1968 1969 static bfd_boolean 1970 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd) 1971 { 1972 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1973 1974 /* TODO: 1975 We are not going to try and fill these in yet and, moreover, we are 1976 going to bail if they are already set. */ 1977 if (cmd->nmodtab != 0 1978 || cmd->ntoc != 0 1979 || cmd->nextrefsyms != 0) 1980 { 1981 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet" 1982 " implemented for dysymtab commands.")); 1983 return FALSE; 1984 } 1985 1986 cmd->ilocalsym = 0; 1987 1988 if (bfd_get_symcount (abfd) > 0) 1989 { 1990 asymbol **symbols = bfd_get_outsymbols (abfd); 1991 unsigned long i; 1992 1993 /* Count the number of each kind of symbol. */ 1994 for (i = 0; i < bfd_get_symcount (abfd); ++i) 1995 { 1996 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 1997 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)) 1998 break; 1999 } 2000 cmd->nlocalsym = i; 2001 cmd->iextdefsym = i; 2002 for (; i < bfd_get_symcount (abfd); ++i) 2003 { 2004 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2005 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF) 2006 break; 2007 } 2008 cmd->nextdefsym = i - cmd->nlocalsym; 2009 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym; 2010 cmd->nundefsym = bfd_get_symcount (abfd) 2011 - cmd->nlocalsym 2012 - cmd->nextdefsym; 2013 } 2014 else 2015 { 2016 cmd->nlocalsym = 0; 2017 cmd->iextdefsym = 0; 2018 cmd->nextdefsym = 0; 2019 cmd->iundefsym = 0; 2020 cmd->nundefsym = 0; 2021 } 2022 2023 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata); 2024 if (cmd->nindirectsyms > 0) 2025 { 2026 unsigned i; 2027 unsigned n; 2028 2029 mdata->filelen = FILE_ALIGN (mdata->filelen, 2); 2030 cmd->indirectsymoff = mdata->filelen; 2031 mdata->filelen += cmd->nindirectsyms * 4; 2032 2033 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms) 2034 return FALSE; 2035 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4); 2036 if (cmd->indirect_syms == NULL) 2037 return FALSE; 2038 2039 n = 0; 2040 for (i = 0; i < mdata->nsects; ++i) 2041 { 2042 bfd_mach_o_section *sec = mdata->sections[i]; 2043 2044 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2045 { 2046 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 2047 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 2048 case BFD_MACH_O_S_SYMBOL_STUBS: 2049 { 2050 unsigned j, num; 2051 bfd_mach_o_asymbol **isyms = sec->indirect_syms; 2052 2053 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec); 2054 if (isyms == NULL || num == 0) 2055 break; 2056 /* Record the starting index in the reserved1 field. */ 2057 sec->reserved1 = n; 2058 for (j = 0; j < num; j++, n++) 2059 { 2060 if (isyms[j] == NULL) 2061 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL; 2062 else if (isyms[j]->symbol.section == bfd_abs_section_ptr 2063 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT)) 2064 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL 2065 | BFD_MACH_O_INDIRECT_SYM_ABS; 2066 else 2067 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i; 2068 } 2069 } 2070 break; 2071 default: 2072 break; 2073 } 2074 } 2075 } 2076 2077 return TRUE; 2078 } 2079 2080 /* Write a dysymtab command. 2081 TODO: Possibly coalesce writes of smaller objects. */ 2082 2083 static bfd_boolean 2084 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 2085 { 2086 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; 2087 2088 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 2089 2090 if (cmd->nmodtab != 0) 2091 { 2092 unsigned int i; 2093 2094 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) 2095 return FALSE; 2096 2097 for (i = 0; i < cmd->nmodtab; i++) 2098 { 2099 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; 2100 unsigned int iinit; 2101 unsigned int ninit; 2102 2103 iinit = module->iinit & 0xffff; 2104 iinit |= ((module->iterm & 0xffff) << 16); 2105 2106 ninit = module->ninit & 0xffff; 2107 ninit |= ((module->nterm & 0xffff) << 16); 2108 2109 if (bfd_mach_o_wide_p (abfd)) 2110 { 2111 struct mach_o_dylib_module_64_external w; 2112 2113 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name); 2114 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym); 2115 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym); 2116 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym); 2117 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym); 2118 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym); 2119 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym); 2120 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel); 2121 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel); 2122 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm); 2123 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm); 2124 bfd_h_put_64 (abfd, module->objc_module_info_addr, 2125 &w.objc_module_info_addr); 2126 bfd_h_put_32 (abfd, module->objc_module_info_size, 2127 &w.objc_module_info_size); 2128 2129 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w)) 2130 return FALSE; 2131 } 2132 else 2133 { 2134 struct mach_o_dylib_module_external n; 2135 2136 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name); 2137 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym); 2138 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym); 2139 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym); 2140 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym); 2141 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym); 2142 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym); 2143 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel); 2144 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel); 2145 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm); 2146 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm); 2147 bfd_h_put_32 (abfd, module->objc_module_info_addr, 2148 &n.objc_module_info_addr); 2149 bfd_h_put_32 (abfd, module->objc_module_info_size, 2150 &n.objc_module_info_size); 2151 2152 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n)) 2153 return FALSE; 2154 } 2155 } 2156 } 2157 2158 if (cmd->ntoc != 0) 2159 { 2160 unsigned int i; 2161 2162 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) 2163 return FALSE; 2164 2165 for (i = 0; i < cmd->ntoc; i++) 2166 { 2167 struct mach_o_dylib_table_of_contents_external raw; 2168 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; 2169 2170 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index); 2171 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index); 2172 2173 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2174 return FALSE; 2175 } 2176 } 2177 2178 if (cmd->nindirectsyms > 0) 2179 { 2180 unsigned int i; 2181 2182 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) 2183 return FALSE; 2184 2185 for (i = 0; i < cmd->nindirectsyms; ++i) 2186 { 2187 unsigned char raw[4]; 2188 2189 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw); 2190 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) 2191 return FALSE; 2192 } 2193 } 2194 2195 if (cmd->nextrefsyms != 0) 2196 { 2197 unsigned int i; 2198 2199 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) 2200 return FALSE; 2201 2202 for (i = 0; i < cmd->nextrefsyms; i++) 2203 { 2204 unsigned long v; 2205 unsigned char raw[4]; 2206 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; 2207 2208 /* Fields isym and flags are written as bit-fields, thus we need 2209 a specific processing for endianness. */ 2210 2211 if (bfd_big_endian (abfd)) 2212 { 2213 v = ((ref->isym & 0xffffff) << 8); 2214 v |= ref->flags & 0xff; 2215 } 2216 else 2217 { 2218 v = ref->isym & 0xffffff; 2219 v |= ((ref->flags & 0xff) << 24); 2220 } 2221 2222 bfd_h_put_32 (abfd, v, raw); 2223 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) 2224 return FALSE; 2225 } 2226 } 2227 2228 /* The command. */ 2229 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0) 2230 return FALSE; 2231 else 2232 { 2233 struct mach_o_dysymtab_command_external raw; 2234 2235 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym); 2236 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym); 2237 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym); 2238 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym); 2239 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym); 2240 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym); 2241 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff); 2242 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc); 2243 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff); 2244 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab); 2245 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff); 2246 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms); 2247 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff); 2248 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms); 2249 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff); 2250 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel); 2251 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff); 2252 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel); 2253 2254 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2255 return FALSE; 2256 } 2257 2258 return TRUE; 2259 } 2260 2261 static unsigned 2262 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s) 2263 { 2264 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE; 2265 2266 /* Just leave debug symbols where they are (pretend they are local, and 2267 then they will just be sorted on position). */ 2268 if (s->n_type & BFD_MACH_O_N_STAB) 2269 return 0; 2270 2271 /* Local (we should never see an undefined local AFAICT). */ 2272 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))) 2273 return 0; 2274 2275 /* Common symbols look like undefined externs. */ 2276 if (mtyp == BFD_MACH_O_N_UNDF) 2277 return 2; 2278 2279 /* A defined non-local, non-debug symbol. */ 2280 return 1; 2281 } 2282 2283 static int 2284 bfd_mach_o_cf_symbols (const void *a, const void *b) 2285 { 2286 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a; 2287 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b; 2288 unsigned int soa, sob; 2289 2290 soa = bfd_mach_o_primary_symbol_sort_key (sa); 2291 sob = bfd_mach_o_primary_symbol_sort_key (sb); 2292 if (soa < sob) 2293 return -1; 2294 2295 if (soa > sob) 2296 return 1; 2297 2298 /* If it's local or stab, just preserve the input order. */ 2299 if (soa == 0) 2300 { 2301 if (sa->symbol.udata.i < sb->symbol.udata.i) 2302 return -1; 2303 if (sa->symbol.udata.i > sb->symbol.udata.i) 2304 return 1; 2305 2306 /* This is probably an error. */ 2307 return 0; 2308 } 2309 2310 /* The second sort key is name. */ 2311 return strcmp (sa->symbol.name, sb->symbol.name); 2312 } 2313 2314 /* Process the symbols. 2315 2316 This should be OK for single-module files - but it is not likely to work 2317 for multi-module shared libraries. 2318 2319 (a) If the application has not filled in the relevant mach-o fields, make 2320 an estimate. 2321 2322 (b) Order them, like this: 2323 ( i) local. 2324 (unsorted) 2325 ( ii) external defined 2326 (by name) 2327 (iii) external undefined/common 2328 (by name) 2329 ( iv) common 2330 (by name) 2331 */ 2332 2333 static bfd_boolean 2334 bfd_mach_o_mangle_symbols (bfd *abfd) 2335 { 2336 unsigned long i; 2337 asymbol **symbols = bfd_get_outsymbols (abfd); 2338 2339 if (symbols == NULL || bfd_get_symcount (abfd) == 0) 2340 return TRUE; 2341 2342 for (i = 0; i < bfd_get_symcount (abfd); i++) 2343 { 2344 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2345 2346 /* We use this value, which is out-of-range as a symbol index, to signal 2347 that the mach-o-specific data are not filled in and need to be created 2348 from the bfd values. It is much preferable for the application to do 2349 this, since more meaningful diagnostics can be made that way. */ 2350 2351 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET) 2352 { 2353 /* No symbol information has been set - therefore determine 2354 it from the bfd symbol flags/info. */ 2355 if (s->symbol.section == bfd_abs_section_ptr) 2356 s->n_type = BFD_MACH_O_N_ABS; 2357 else if (s->symbol.section == bfd_und_section_ptr) 2358 { 2359 s->n_type = BFD_MACH_O_N_UNDF; 2360 if (s->symbol.flags & BSF_WEAK) 2361 s->n_desc |= BFD_MACH_O_N_WEAK_REF; 2362 /* mach-o automatically makes undefined symbols extern. */ 2363 s->n_type |= BFD_MACH_O_N_EXT; 2364 s->symbol.flags |= BSF_GLOBAL; 2365 } 2366 else if (s->symbol.section == bfd_com_section_ptr) 2367 { 2368 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT; 2369 s->symbol.flags |= BSF_GLOBAL; 2370 } 2371 else 2372 s->n_type = BFD_MACH_O_N_SECT; 2373 2374 if (s->symbol.flags & BSF_GLOBAL) 2375 s->n_type |= BFD_MACH_O_N_EXT; 2376 } 2377 2378 /* Put the section index in, where required. */ 2379 if ((s->symbol.section != bfd_abs_section_ptr 2380 && s->symbol.section != bfd_und_section_ptr 2381 && s->symbol.section != bfd_com_section_ptr) 2382 || ((s->n_type & BFD_MACH_O_N_STAB) != 0 2383 && s->symbol.name == NULL)) 2384 s->n_sect = s->symbol.section->output_section->target_index; 2385 2386 /* Number to preserve order for local and debug syms. */ 2387 s->symbol.udata.i = i; 2388 } 2389 2390 /* Sort the symbols. */ 2391 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd), 2392 sizeof (asymbol *), bfd_mach_o_cf_symbols); 2393 2394 for (i = 0; i < bfd_get_symcount (abfd); ++i) 2395 { 2396 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2397 s->symbol.udata.i = i; /* renumber. */ 2398 } 2399 2400 return TRUE; 2401 } 2402 2403 /* We build a flat table of sections, which can be re-ordered if necessary. 2404 Fill in the section number and other mach-o-specific data. */ 2405 2406 static bfd_boolean 2407 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata) 2408 { 2409 asection *sec; 2410 unsigned target_index; 2411 unsigned nsect; 2412 2413 nsect = bfd_count_sections (abfd); 2414 2415 /* Don't do it if it's already set - assume the application knows what it's 2416 doing. */ 2417 if (mdata->nsects == nsect 2418 && (mdata->nsects == 0 || mdata->sections != NULL)) 2419 return TRUE; 2420 2421 /* We need to check that this can be done... */ 2422 if (nsect > 255) 2423 { 2424 _bfd_error_handler (_("mach-o: there are too many sections (%u)" 2425 " maximum is 255,\n"), nsect); 2426 return FALSE; 2427 } 2428 2429 mdata->nsects = nsect; 2430 mdata->sections = bfd_alloc2 (abfd, 2431 mdata->nsects, sizeof (bfd_mach_o_section *)); 2432 if (mdata->sections == NULL) 2433 return FALSE; 2434 2435 /* Create Mach-O sections. 2436 Section type, attribute and align should have been set when the 2437 section was created - either read in or specified. */ 2438 target_index = 0; 2439 for (sec = abfd->sections; sec; sec = sec->next) 2440 { 2441 unsigned bfd_align = bfd_get_section_alignment (abfd, sec); 2442 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec); 2443 2444 mdata->sections[target_index] = msect; 2445 2446 msect->addr = bfd_get_section_vma (abfd, sec); 2447 msect->size = bfd_get_section_size (sec); 2448 2449 /* Use the largest alignment set, in case it was bumped after the 2450 section was created. */ 2451 msect->align = msect->align > bfd_align ? msect->align : bfd_align; 2452 2453 msect->offset = 0; 2454 sec->target_index = ++target_index; 2455 } 2456 2457 return TRUE; 2458 } 2459 2460 bfd_boolean 2461 bfd_mach_o_write_contents (bfd *abfd) 2462 { 2463 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2464 bfd_mach_o_load_command *cmd; 2465 bfd_mach_o_symtab_command *symtab = NULL; 2466 bfd_mach_o_dysymtab_command *dysymtab = NULL; 2467 bfd_mach_o_segment_command *linkedit = NULL; 2468 2469 /* Make the commands, if not already present. */ 2470 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 2471 return FALSE; 2472 abfd->output_has_begun = TRUE; 2473 2474 /* Write the header. */ 2475 if (!bfd_mach_o_write_header (abfd, &mdata->header)) 2476 return FALSE; 2477 2478 /* First pass: allocate the linkedit segment. */ 2479 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2480 switch (cmd->type) 2481 { 2482 case BFD_MACH_O_LC_SEGMENT_64: 2483 case BFD_MACH_O_LC_SEGMENT: 2484 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0) 2485 linkedit = &cmd->command.segment; 2486 break; 2487 case BFD_MACH_O_LC_SYMTAB: 2488 symtab = &cmd->command.symtab; 2489 break; 2490 case BFD_MACH_O_LC_DYSYMTAB: 2491 dysymtab = &cmd->command.dysymtab; 2492 break; 2493 case BFD_MACH_O_LC_DYLD_INFO: 2494 { 2495 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info; 2496 2497 if (di->rebase_size != 0) 2498 { 2499 di->rebase_off = mdata->filelen; 2500 mdata->filelen += di->rebase_size; 2501 } 2502 if (di->bind_size != 0) 2503 { 2504 di->bind_off = mdata->filelen; 2505 mdata->filelen += di->bind_size; 2506 } 2507 if (di->weak_bind_size != 0) 2508 { 2509 di->weak_bind_off = mdata->filelen; 2510 mdata->filelen += di->weak_bind_size; 2511 } 2512 if (di->lazy_bind_size != 0) 2513 { 2514 di->lazy_bind_off = mdata->filelen; 2515 mdata->filelen += di->lazy_bind_size; 2516 } 2517 if (di->export_size != 0) 2518 { 2519 di->export_off = mdata->filelen; 2520 mdata->filelen += di->export_size; 2521 } 2522 } 2523 break; 2524 case BFD_MACH_O_LC_LOAD_DYLIB: 2525 case BFD_MACH_O_LC_LOAD_DYLINKER: 2526 case BFD_MACH_O_LC_MAIN: 2527 /* Nothing to do. */ 2528 break; 2529 default: 2530 _bfd_error_handler 2531 (_("unable to allocate data for load command 0x%lx"), 2532 (unsigned long) cmd->type); 2533 break; 2534 } 2535 2536 /* Specially handle symtab and dysymtab. */ 2537 2538 /* Pre-allocate the symbol table (but not the string table). The reason 2539 is that the dysymtab is after the symbol table but before the string 2540 table (required by the native strip tool). */ 2541 if (symtab != NULL) 2542 { 2543 unsigned int symlen; 2544 unsigned int wide = bfd_mach_o_wide_p (abfd); 2545 2546 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 2547 2548 /* Align for symbols. */ 2549 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2); 2550 symtab->symoff = mdata->filelen; 2551 2552 symtab->nsyms = bfd_get_symcount (abfd); 2553 mdata->filelen += symtab->nsyms * symlen; 2554 } 2555 2556 /* Build the dysymtab. */ 2557 if (dysymtab != NULL) 2558 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab)) 2559 return FALSE; 2560 2561 /* Write symtab and strtab. */ 2562 if (symtab != NULL) 2563 if (!bfd_mach_o_write_symtab_content (abfd, symtab)) 2564 return FALSE; 2565 2566 /* Adjust linkedit size. */ 2567 if (linkedit != NULL) 2568 { 2569 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */ 2570 2571 linkedit->vmsize = mdata->filelen - linkedit->fileoff; 2572 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */ 2573 linkedit->filesize = mdata->filelen - linkedit->fileoff; 2574 2575 linkedit->initprot = BFD_MACH_O_PROT_READ; 2576 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2577 | BFD_MACH_O_PROT_EXECUTE; 2578 } 2579 2580 /* Second pass: write commands. */ 2581 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2582 { 2583 struct mach_o_load_command_external raw; 2584 unsigned long typeflag; 2585 2586 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0); 2587 2588 bfd_h_put_32 (abfd, typeflag, raw.cmd); 2589 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize); 2590 2591 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0 2592 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8) 2593 return FALSE; 2594 2595 switch (cmd->type) 2596 { 2597 case BFD_MACH_O_LC_SEGMENT: 2598 if (!bfd_mach_o_write_segment_32 (abfd, cmd)) 2599 return FALSE; 2600 break; 2601 case BFD_MACH_O_LC_SEGMENT_64: 2602 if (!bfd_mach_o_write_segment_64 (abfd, cmd)) 2603 return FALSE; 2604 break; 2605 case BFD_MACH_O_LC_SYMTAB: 2606 if (!bfd_mach_o_write_symtab (abfd, cmd)) 2607 return FALSE; 2608 break; 2609 case BFD_MACH_O_LC_DYSYMTAB: 2610 if (!bfd_mach_o_write_dysymtab (abfd, cmd)) 2611 return FALSE; 2612 break; 2613 case BFD_MACH_O_LC_THREAD: 2614 case BFD_MACH_O_LC_UNIXTHREAD: 2615 if (!bfd_mach_o_write_thread (abfd, cmd)) 2616 return FALSE; 2617 break; 2618 case BFD_MACH_O_LC_LOAD_DYLIB: 2619 if (!bfd_mach_o_write_dylib (abfd, cmd)) 2620 return FALSE; 2621 break; 2622 case BFD_MACH_O_LC_LOAD_DYLINKER: 2623 if (!bfd_mach_o_write_dylinker (abfd, cmd)) 2624 return FALSE; 2625 break; 2626 case BFD_MACH_O_LC_MAIN: 2627 if (!bfd_mach_o_write_main (abfd, cmd)) 2628 return FALSE; 2629 break; 2630 case BFD_MACH_O_LC_DYLD_INFO: 2631 if (!bfd_mach_o_write_dyld_info (abfd, cmd)) 2632 return FALSE; 2633 break; 2634 default: 2635 _bfd_error_handler 2636 (_("unable to write unknown load command 0x%lx"), 2637 (unsigned long) cmd->type); 2638 return FALSE; 2639 } 2640 } 2641 2642 return TRUE; 2643 } 2644 2645 static void 2646 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg, 2647 bfd_mach_o_section *s) 2648 { 2649 if (seg->sect_head == NULL) 2650 seg->sect_head = s; 2651 else 2652 seg->sect_tail->next = s; 2653 seg->sect_tail = s; 2654 } 2655 2656 /* Create section Mach-O flags from BFD flags. */ 2657 2658 static void 2659 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, 2660 asection *sec) 2661 { 2662 flagword bfd_flags; 2663 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec); 2664 2665 /* Create default flags. */ 2666 bfd_flags = bfd_get_section_flags (abfd, sec); 2667 if ((bfd_flags & SEC_CODE) == SEC_CODE) 2668 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS 2669 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 2670 | BFD_MACH_O_S_REGULAR; 2671 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC) 2672 s->flags = BFD_MACH_O_S_ZEROFILL; 2673 else if (bfd_flags & SEC_DEBUGGING) 2674 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG; 2675 else 2676 s->flags = BFD_MACH_O_S_REGULAR; 2677 } 2678 2679 static bfd_boolean 2680 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2681 { 2682 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2683 unsigned int i, j; 2684 2685 seg->vmaddr = 0; 2686 seg->fileoff = mdata->filelen; 2687 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2688 | BFD_MACH_O_PROT_EXECUTE; 2689 seg->maxprot = seg->initprot; 2690 2691 /* Append sections to the segment. 2692 2693 This is a little tedious, we have to honor the need to account zerofill 2694 sections after all the rest. This forces us to do the calculation of 2695 total vmsize in three passes so that any alignment increments are 2696 properly accounted. */ 2697 for (i = 0; i < mdata->nsects; ++i) 2698 { 2699 bfd_mach_o_section *s = mdata->sections[i]; 2700 asection *sec = s->bfdsection; 2701 2702 /* Although we account for zerofill section sizes in vm order, they are 2703 placed in the file in source sequence. */ 2704 bfd_mach_o_append_section_to_segment (seg, s); 2705 s->offset = 0; 2706 2707 /* Zerofill sections have zero file size & offset, the only content 2708 written to the file is the symbols. */ 2709 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL 2710 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2711 == BFD_MACH_O_S_GB_ZEROFILL)) 2712 continue; 2713 2714 /* The Darwin system tools (in MH_OBJECT files, at least) always account 2715 sections, even those with zero size. */ 2716 if (s->size > 0) 2717 { 2718 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2719 seg->vmsize += s->size; 2720 2721 /* MH_OBJECT files have unaligned content. */ 2722 if (1) 2723 { 2724 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2725 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2726 } 2727 seg->filesize += s->size; 2728 2729 /* The system tools write even zero-sized sections with an offset 2730 field set to the current file position. */ 2731 s->offset = mdata->filelen; 2732 } 2733 2734 sec->filepos = s->offset; 2735 mdata->filelen += s->size; 2736 } 2737 2738 /* Now pass through again, for zerofill, only now we just update the 2739 vmsize, and then for zerofill_GB. */ 2740 for (j = 0; j < 2; j++) 2741 { 2742 unsigned int stype; 2743 2744 if (j == 0) 2745 stype = BFD_MACH_O_S_ZEROFILL; 2746 else 2747 stype = BFD_MACH_O_S_GB_ZEROFILL; 2748 2749 for (i = 0; i < mdata->nsects; ++i) 2750 { 2751 bfd_mach_o_section *s = mdata->sections[i]; 2752 2753 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype) 2754 continue; 2755 2756 if (s->size > 0) 2757 { 2758 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2759 seg->vmsize += s->size; 2760 } 2761 } 2762 } 2763 2764 /* Allocate space for the relocations. */ 2765 mdata->filelen = FILE_ALIGN (mdata->filelen, 2); 2766 2767 for (i = 0; i < mdata->nsects; ++i) 2768 { 2769 bfd_mach_o_section *ms = mdata->sections[i]; 2770 asection *sec = ms->bfdsection; 2771 2772 ms->nreloc = sec->reloc_count; 2773 if (ms->nreloc == 0) 2774 { 2775 /* Clear nreloc and reloff if there is no relocs. */ 2776 ms->reloff = 0; 2777 continue; 2778 } 2779 sec->rel_filepos = mdata->filelen; 2780 ms->reloff = sec->rel_filepos; 2781 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE; 2782 } 2783 2784 return TRUE; 2785 } 2786 2787 static bfd_boolean 2788 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2789 { 2790 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2791 unsigned int i; 2792 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; 2793 bfd_vma vma; 2794 bfd_mach_o_section *s; 2795 2796 seg->vmsize = 0; 2797 2798 seg->fileoff = mdata->filelen; 2799 seg->maxprot = 0; 2800 seg->initprot = 0; 2801 seg->flags = 0; 2802 2803 /* Append sections to the segment. We assume they are properly ordered 2804 by vma (but we check that). */ 2805 vma = 0; 2806 for (i = 0; i < mdata->nsects; ++i) 2807 { 2808 s = mdata->sections[i]; 2809 2810 /* Consider only sections for this segment. */ 2811 if (strcmp (seg->segname, s->segname) != 0) 2812 continue; 2813 2814 bfd_mach_o_append_section_to_segment (seg, s); 2815 2816 if (s->addr < vma) 2817 { 2818 _bfd_error_handler 2819 /* xgettext:c-format */ 2820 (_("section address (%lx) below start of segment (%lx)"), 2821 (unsigned long) s->addr, (unsigned long) vma); 2822 return FALSE; 2823 } 2824 2825 vma = s->addr + s->size; 2826 } 2827 2828 /* Set segment file offset: make it page aligned. */ 2829 vma = seg->sect_head->addr; 2830 seg->vmaddr = vma & ~pagemask; 2831 if ((mdata->filelen & pagemask) > (vma & pagemask)) 2832 mdata->filelen += pagemask + 1; 2833 seg->fileoff = mdata->filelen & ~pagemask; 2834 mdata->filelen = seg->fileoff + (vma & pagemask); 2835 2836 /* Set section file offset. */ 2837 for (s = seg->sect_head; s != NULL; s = s->next) 2838 { 2839 asection *sec = s->bfdsection; 2840 flagword flags = bfd_get_section_flags (abfd, sec); 2841 2842 /* Adjust segment size. */ 2843 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2844 seg->vmsize += s->size; 2845 2846 /* File offset and length. */ 2847 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2848 2849 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL 2850 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2851 != BFD_MACH_O_S_GB_ZEROFILL)) 2852 { 2853 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2854 2855 s->offset = mdata->filelen; 2856 s->bfdsection->filepos = s->offset; 2857 2858 seg->filesize += s->size; 2859 mdata->filelen += s->size; 2860 } 2861 else 2862 { 2863 s->offset = 0; 2864 s->bfdsection->filepos = 0; 2865 } 2866 2867 /* Set protection. */ 2868 if (flags & SEC_LOAD) 2869 { 2870 if (flags & SEC_CODE) 2871 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE; 2872 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA) 2873 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ; 2874 } 2875 2876 /* Relocs shouldn't appear in non-object files. */ 2877 if (s->bfdsection->reloc_count != 0) 2878 return FALSE; 2879 } 2880 2881 /* Set maxprot. */ 2882 if (seg->initprot != 0) 2883 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2884 | BFD_MACH_O_PROT_EXECUTE; 2885 else 2886 seg->maxprot = 0; 2887 2888 /* Round segment size (and file size). */ 2889 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask; 2890 seg->filesize = (seg->filesize + pagemask) & ~pagemask; 2891 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask; 2892 2893 return TRUE; 2894 } 2895 2896 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds 2897 fields in header. */ 2898 2899 static bfd_boolean 2900 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata) 2901 { 2902 unsigned wide = mach_o_wide_p (&mdata->header); 2903 unsigned int hdrlen; 2904 ufile_ptr offset; 2905 bfd_mach_o_load_command *cmd; 2906 unsigned int align; 2907 bfd_boolean ret = TRUE; 2908 2909 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 2910 align = wide ? 8 - 1 : 4 - 1; 2911 offset = hdrlen; 2912 mdata->header.ncmds = 0; 2913 2914 for (cmd = mdata->first_command; cmd; cmd = cmd->next) 2915 { 2916 mdata->header.ncmds++; 2917 cmd->offset = offset; 2918 2919 switch (cmd->type) 2920 { 2921 case BFD_MACH_O_LC_SEGMENT_64: 2922 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE 2923 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects; 2924 break; 2925 case BFD_MACH_O_LC_SEGMENT: 2926 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE 2927 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects; 2928 break; 2929 case BFD_MACH_O_LC_SYMTAB: 2930 cmd->len = sizeof (struct mach_o_symtab_command_external) 2931 + BFD_MACH_O_LC_SIZE; 2932 break; 2933 case BFD_MACH_O_LC_DYSYMTAB: 2934 cmd->len = sizeof (struct mach_o_dysymtab_command_external) 2935 + BFD_MACH_O_LC_SIZE; 2936 break; 2937 case BFD_MACH_O_LC_LOAD_DYLIB: 2938 cmd->len = sizeof (struct mach_o_dylib_command_external) 2939 + BFD_MACH_O_LC_SIZE; 2940 cmd->command.dylib.name_offset = cmd->len; 2941 cmd->len += strlen (cmd->command.dylib.name_str); 2942 cmd->len = (cmd->len + align) & ~align; 2943 break; 2944 case BFD_MACH_O_LC_LOAD_DYLINKER: 2945 cmd->len = sizeof (struct mach_o_str_command_external) 2946 + BFD_MACH_O_LC_SIZE; 2947 cmd->command.dylinker.name_offset = cmd->len; 2948 cmd->len += strlen (cmd->command.dylinker.name_str); 2949 cmd->len = (cmd->len + align) & ~align; 2950 break; 2951 case BFD_MACH_O_LC_MAIN: 2952 cmd->len = sizeof (struct mach_o_entry_point_command_external) 2953 + BFD_MACH_O_LC_SIZE; 2954 break; 2955 case BFD_MACH_O_LC_DYLD_INFO: 2956 cmd->len = sizeof (struct mach_o_dyld_info_command_external) 2957 + BFD_MACH_O_LC_SIZE; 2958 break; 2959 default: 2960 _bfd_error_handler 2961 (_("unable to layout unknown load command 0x%lx"), 2962 (unsigned long) cmd->type); 2963 ret = FALSE; 2964 break; 2965 } 2966 2967 BFD_ASSERT (cmd->len % (align + 1) == 0); 2968 offset += cmd->len; 2969 } 2970 mdata->header.sizeofcmds = offset - hdrlen; 2971 mdata->filelen = offset; 2972 2973 return ret; 2974 } 2975 2976 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a 2977 segment. */ 2978 2979 static void 2980 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata, 2981 bfd_mach_o_load_command *cmd, 2982 const char *segname, unsigned int nbr_sect) 2983 { 2984 bfd_mach_o_segment_command *seg = &cmd->command.segment; 2985 unsigned wide = mach_o_wide_p (&mdata->header); 2986 2987 /* Init segment command. */ 2988 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT; 2989 cmd->type_required = FALSE; 2990 2991 strcpy (seg->segname, segname); 2992 seg->nsects = nbr_sect; 2993 2994 seg->vmaddr = 0; 2995 seg->vmsize = 0; 2996 2997 seg->fileoff = 0; 2998 seg->filesize = 0; 2999 seg->maxprot = 0; 3000 seg->initprot = 0; 3001 seg->flags = 0; 3002 seg->sect_head = NULL; 3003 seg->sect_tail = NULL; 3004 } 3005 3006 /* Build Mach-O load commands (currently assuming an MH_OBJECT file). 3007 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip 3008 and copy functionality. */ 3009 3010 bfd_boolean 3011 bfd_mach_o_build_commands (bfd *abfd) 3012 { 3013 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3014 unsigned wide = mach_o_wide_p (&mdata->header); 3015 unsigned int nbr_segcmd = 0; 3016 bfd_mach_o_load_command *commands; 3017 unsigned int nbr_commands; 3018 int symtab_idx = -1; 3019 int dysymtab_idx = -1; 3020 int main_idx = -1; 3021 unsigned int i; 3022 3023 /* Return now if already built. */ 3024 if (mdata->header.ncmds != 0) 3025 return TRUE; 3026 3027 /* Fill in the file type, if not already set. */ 3028 if (mdata->header.filetype == 0) 3029 { 3030 if (abfd->flags & EXEC_P) 3031 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE; 3032 else if (abfd->flags & DYNAMIC) 3033 mdata->header.filetype = BFD_MACH_O_MH_DYLIB; 3034 else 3035 mdata->header.filetype = BFD_MACH_O_MH_OBJECT; 3036 } 3037 3038 /* If hasn't already been done, flatten sections list, and sort 3039 if/when required. Must be done before the symbol table is adjusted, 3040 since that depends on properly numbered sections. */ 3041 if (mdata->nsects == 0 || mdata->sections == NULL) 3042 if (! bfd_mach_o_mangle_sections (abfd, mdata)) 3043 return FALSE; 3044 3045 /* Order the symbol table, fill-in/check mach-o specific fields and 3046 partition out any indirect symbols. */ 3047 if (!bfd_mach_o_mangle_symbols (abfd)) 3048 return FALSE; 3049 3050 /* Segment commands. */ 3051 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3052 { 3053 /* Only one segment for all the sections. But the segment is 3054 optional if there is no sections. */ 3055 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0; 3056 } 3057 else 3058 { 3059 bfd_mach_o_section *prev_sect = NULL; 3060 3061 /* One pagezero segment and one linkedit segment. */ 3062 nbr_segcmd = 2; 3063 3064 /* Create one segment for associated segment name in sections. 3065 Assume that sections with the same segment name are consecutive. */ 3066 for (i = 0; i < mdata->nsects; i++) 3067 { 3068 bfd_mach_o_section *this_sect = mdata->sections[i]; 3069 3070 if (prev_sect == NULL 3071 || strcmp (prev_sect->segname, this_sect->segname) != 0) 3072 { 3073 nbr_segcmd++; 3074 prev_sect = this_sect; 3075 } 3076 } 3077 } 3078 3079 nbr_commands = nbr_segcmd; 3080 3081 /* One command for the symbol table (only if there are symbols. */ 3082 if (bfd_get_symcount (abfd) > 0) 3083 symtab_idx = nbr_commands++; 3084 3085 /* FIXME: 3086 This is a rather crude test for whether we should build a dysymtab. */ 3087 if (bfd_mach_o_should_emit_dysymtab () 3088 && bfd_get_symcount (abfd)) 3089 { 3090 /* If there should be a case where a dysymtab could be emitted without 3091 a symtab (seems improbable), this would need amending. */ 3092 dysymtab_idx = nbr_commands++; 3093 } 3094 3095 /* Add an entry point command. */ 3096 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE 3097 && bfd_get_start_address (abfd) != 0) 3098 main_idx = nbr_commands++; 3099 3100 /* Well, we must have a header, at least. */ 3101 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3102 3103 /* A bit unusual, but no content is valid; 3104 as -n empty.s -o empty.o */ 3105 if (nbr_commands == 0) 3106 { 3107 /* Layout commands (well none...) and set headers command fields. */ 3108 return bfd_mach_o_layout_commands (mdata); 3109 } 3110 3111 /* Create commands for segments (and symtabs), prepend them. */ 3112 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command)); 3113 if (commands == NULL) 3114 return FALSE; 3115 for (i = 0; i < nbr_commands - 1; i++) 3116 commands[i].next = &commands[i + 1]; 3117 commands[nbr_commands - 1].next = mdata->first_command; 3118 if (mdata->first_command == NULL) 3119 mdata->last_command = &commands[nbr_commands - 1]; 3120 mdata->first_command = &commands[0]; 3121 3122 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0) 3123 { 3124 /* For object file, there is only one segment. */ 3125 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects); 3126 } 3127 else if (nbr_segcmd != 0) 3128 { 3129 bfd_mach_o_load_command *cmd; 3130 3131 BFD_ASSERT (nbr_segcmd >= 2); 3132 3133 /* The pagezero. */ 3134 cmd = &commands[0]; 3135 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0); 3136 3137 /* Segments from sections. */ 3138 cmd++; 3139 for (i = 0; i < mdata->nsects;) 3140 { 3141 const char *segname = mdata->sections[i]->segname; 3142 unsigned int nbr_sect = 1; 3143 3144 /* Count number of sections for this segment. */ 3145 for (i++; i < mdata->nsects; i++) 3146 if (strcmp (mdata->sections[i]->segname, segname) == 0) 3147 nbr_sect++; 3148 else 3149 break; 3150 3151 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect); 3152 cmd++; 3153 } 3154 3155 /* The linkedit. */ 3156 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0); 3157 } 3158 3159 if (symtab_idx >= 0) 3160 { 3161 /* Init symtab command. */ 3162 bfd_mach_o_load_command *cmd = &commands[symtab_idx]; 3163 3164 cmd->type = BFD_MACH_O_LC_SYMTAB; 3165 cmd->type_required = FALSE; 3166 } 3167 3168 /* If required, setup symtab command, see comment above about the quality 3169 of this test. */ 3170 if (dysymtab_idx >= 0) 3171 { 3172 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx]; 3173 3174 cmd->type = BFD_MACH_O_LC_DYSYMTAB; 3175 cmd->type_required = FALSE; 3176 } 3177 3178 /* Create the main command. */ 3179 if (main_idx >= 0) 3180 { 3181 bfd_mach_o_load_command *cmd = &commands[main_idx]; 3182 3183 cmd->type = BFD_MACH_O_LC_MAIN; 3184 cmd->type_required = TRUE; 3185 3186 cmd->command.main.entryoff = 0; 3187 cmd->command.main.stacksize = 0; 3188 } 3189 3190 /* Layout commands. */ 3191 if (! bfd_mach_o_layout_commands (mdata)) 3192 return FALSE; 3193 3194 /* So, now we have sized the commands and the filelen set to that. 3195 Now we can build the segment command and set the section file offsets. */ 3196 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3197 { 3198 for (i = 0; i < nbr_segcmd; i++) 3199 if (!bfd_mach_o_build_obj_seg_command 3200 (abfd, &commands[i].command.segment)) 3201 return FALSE; 3202 } 3203 else 3204 { 3205 bfd_vma maxvma = 0; 3206 3207 /* Skip pagezero and linkedit segments. */ 3208 for (i = 1; i < nbr_segcmd - 1; i++) 3209 { 3210 bfd_mach_o_segment_command *seg = &commands[i].command.segment; 3211 3212 if (!bfd_mach_o_build_exec_seg_command (abfd, seg)) 3213 return FALSE; 3214 3215 if (seg->vmaddr + seg->vmsize > maxvma) 3216 maxvma = seg->vmaddr + seg->vmsize; 3217 } 3218 3219 /* Set the size of __PAGEZERO. */ 3220 commands[0].command.segment.vmsize = 3221 commands[1].command.segment.vmaddr; 3222 3223 /* Set the vma and fileoff of __LINKEDIT. */ 3224 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma; 3225 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen; 3226 3227 /* Set entry point (once segments have been laid out). */ 3228 if (main_idx >= 0) 3229 commands[main_idx].command.main.entryoff = 3230 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr; 3231 } 3232 3233 return TRUE; 3234 } 3235 3236 /* Set the contents of a section. */ 3237 3238 bfd_boolean 3239 bfd_mach_o_set_section_contents (bfd *abfd, 3240 asection *section, 3241 const void * location, 3242 file_ptr offset, 3243 bfd_size_type count) 3244 { 3245 file_ptr pos; 3246 3247 /* Trying to write the first section contents will trigger the creation of 3248 the load commands if they are not already present. */ 3249 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 3250 return FALSE; 3251 3252 if (count == 0) 3253 return TRUE; 3254 3255 pos = section->filepos + offset; 3256 if (bfd_seek (abfd, pos, SEEK_SET) != 0 3257 || bfd_bwrite (location, count, abfd) != count) 3258 return FALSE; 3259 3260 return TRUE; 3261 } 3262 3263 int 3264 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, 3265 struct bfd_link_info *info ATTRIBUTE_UNUSED) 3266 { 3267 return 0; 3268 } 3269 3270 /* Make an empty symbol. This is required only because 3271 bfd_make_section_anyway wants to create a symbol for the section. */ 3272 3273 asymbol * 3274 bfd_mach_o_make_empty_symbol (bfd *abfd) 3275 { 3276 asymbol *new_symbol; 3277 3278 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol)); 3279 if (new_symbol == NULL) 3280 return new_symbol; 3281 new_symbol->the_bfd = abfd; 3282 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET; 3283 return new_symbol; 3284 } 3285 3286 static bfd_boolean 3287 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header) 3288 { 3289 struct mach_o_header_external raw; 3290 unsigned int size; 3291 bfd_vma (*get32) (const void *) = NULL; 3292 3293 /* Just read the magic number. */ 3294 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3295 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4) 3296 return FALSE; 3297 3298 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3299 { 3300 header->byteorder = BFD_ENDIAN_BIG; 3301 header->magic = BFD_MACH_O_MH_MAGIC; 3302 header->version = 1; 3303 get32 = bfd_getb32; 3304 } 3305 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3306 { 3307 header->byteorder = BFD_ENDIAN_LITTLE; 3308 header->magic = BFD_MACH_O_MH_MAGIC; 3309 header->version = 1; 3310 get32 = bfd_getl32; 3311 } 3312 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3313 { 3314 header->byteorder = BFD_ENDIAN_BIG; 3315 header->magic = BFD_MACH_O_MH_MAGIC_64; 3316 header->version = 2; 3317 get32 = bfd_getb32; 3318 } 3319 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3320 { 3321 header->byteorder = BFD_ENDIAN_LITTLE; 3322 header->magic = BFD_MACH_O_MH_MAGIC_64; 3323 header->version = 2; 3324 get32 = bfd_getl32; 3325 } 3326 else 3327 { 3328 header->byteorder = BFD_ENDIAN_UNKNOWN; 3329 return FALSE; 3330 } 3331 3332 /* Once the size of the header is known, read the full header. */ 3333 size = mach_o_wide_p (header) ? 3334 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3335 3336 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3337 || bfd_bread (&raw, size, abfd) != size) 3338 return FALSE; 3339 3340 header->cputype = (*get32) (raw.cputype); 3341 header->cpusubtype = (*get32) (raw.cpusubtype); 3342 header->filetype = (*get32) (raw.filetype); 3343 header->ncmds = (*get32) (raw.ncmds); 3344 header->sizeofcmds = (*get32) (raw.sizeofcmds); 3345 header->flags = (*get32) (raw.flags); 3346 3347 if (mach_o_wide_p (header)) 3348 header->reserved = (*get32) (raw.reserved); 3349 else 3350 header->reserved = 0; 3351 3352 return TRUE; 3353 } 3354 3355 bfd_boolean 3356 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec) 3357 { 3358 bfd_mach_o_section *s; 3359 unsigned bfdalign = bfd_get_section_alignment (abfd, sec); 3360 3361 s = bfd_mach_o_get_mach_o_section (sec); 3362 if (s == NULL) 3363 { 3364 flagword bfd_flags; 3365 static const mach_o_section_name_xlat * xlat; 3366 3367 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s)); 3368 if (s == NULL) 3369 return FALSE; 3370 sec->used_by_bfd = s; 3371 s->bfdsection = sec; 3372 3373 /* Create the Darwin seg/sect name pair from the bfd name. 3374 If this is a canonical name for which a specific paiting exists 3375 there will also be defined flags, type, attribute and alignment 3376 values. */ 3377 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s); 3378 if (xlat != NULL) 3379 { 3380 s->flags = xlat->macho_sectype | xlat->macho_secattr; 3381 s->align = xlat->sectalign > bfdalign ? xlat->sectalign 3382 : bfdalign; 3383 (void) bfd_set_section_alignment (abfd, sec, s->align); 3384 bfd_flags = bfd_get_section_flags (abfd, sec); 3385 if (bfd_flags == SEC_NO_FLAGS) 3386 bfd_set_section_flags (abfd, sec, xlat->bfd_flags); 3387 } 3388 else 3389 /* Create default flags. */ 3390 bfd_mach_o_set_section_flags_from_bfd (abfd, sec); 3391 } 3392 3393 return _bfd_generic_new_section_hook (abfd, sec); 3394 } 3395 3396 static void 3397 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec, 3398 unsigned long prot) 3399 { 3400 flagword flags; 3401 bfd_mach_o_section *section; 3402 3403 flags = bfd_get_section_flags (abfd, sec); 3404 section = bfd_mach_o_get_mach_o_section (sec); 3405 3406 /* TODO: see if we should use the xlat system for doing this by 3407 preference and fall back to this for unknown sections. */ 3408 3409 if (flags == SEC_NO_FLAGS) 3410 { 3411 /* Try to guess flags. */ 3412 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG) 3413 flags = SEC_DEBUGGING; 3414 else 3415 { 3416 flags = SEC_ALLOC; 3417 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK) 3418 != BFD_MACH_O_S_ZEROFILL) 3419 { 3420 flags |= SEC_LOAD; 3421 if (prot & BFD_MACH_O_PROT_EXECUTE) 3422 flags |= SEC_CODE; 3423 if (prot & BFD_MACH_O_PROT_WRITE) 3424 flags |= SEC_DATA; 3425 else if (prot & BFD_MACH_O_PROT_READ) 3426 flags |= SEC_READONLY; 3427 } 3428 } 3429 } 3430 else 3431 { 3432 if ((flags & SEC_DEBUGGING) == 0) 3433 flags |= SEC_ALLOC; 3434 } 3435 3436 if (section->offset != 0) 3437 flags |= SEC_HAS_CONTENTS; 3438 if (section->nreloc != 0) 3439 flags |= SEC_RELOC; 3440 3441 bfd_set_section_flags (abfd, sec, flags); 3442 3443 sec->vma = section->addr; 3444 sec->lma = section->addr; 3445 sec->size = section->size; 3446 sec->filepos = section->offset; 3447 sec->alignment_power = section->align; 3448 sec->segment_mark = 0; 3449 sec->reloc_count = section->nreloc; 3450 sec->rel_filepos = section->reloff; 3451 } 3452 3453 static asection * 3454 bfd_mach_o_make_bfd_section (bfd *abfd, 3455 const unsigned char *segname, 3456 const unsigned char *sectname) 3457 { 3458 const char *sname; 3459 flagword flags; 3460 3461 bfd_mach_o_convert_section_name_to_bfd 3462 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags); 3463 if (sname == NULL) 3464 return NULL; 3465 3466 return bfd_make_section_anyway_with_flags (abfd, sname, flags); 3467 } 3468 3469 static asection * 3470 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot) 3471 { 3472 struct mach_o_section_32_external raw; 3473 asection *sec; 3474 bfd_mach_o_section *section; 3475 3476 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd) 3477 != BFD_MACH_O_SECTION_SIZE) 3478 return NULL; 3479 3480 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3481 if (sec == NULL) 3482 return NULL; 3483 3484 section = bfd_mach_o_get_mach_o_section (sec); 3485 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3486 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3487 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3488 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3489 section->addr = bfd_h_get_32 (abfd, raw.addr); 3490 section->size = bfd_h_get_32 (abfd, raw.size); 3491 section->offset = bfd_h_get_32 (abfd, raw.offset); 3492 section->align = bfd_h_get_32 (abfd, raw.align); 3493 /* PR 17512: file: 0017eb76. */ 3494 if (section->align > 64) 3495 { 3496 _bfd_error_handler 3497 (_("bfd_mach_o_read_section_32: overlarge alignment value: 0x%x, " 3498 "using 32 instead"), section->align); 3499 section->align = 32; 3500 } 3501 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3502 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3503 section->flags = bfd_h_get_32 (abfd, raw.flags); 3504 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3505 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3506 section->reserved3 = 0; 3507 3508 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3509 3510 return sec; 3511 } 3512 3513 static asection * 3514 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot) 3515 { 3516 struct mach_o_section_64_external raw; 3517 asection *sec; 3518 bfd_mach_o_section *section; 3519 3520 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) 3521 != BFD_MACH_O_SECTION_64_SIZE) 3522 return NULL; 3523 3524 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3525 if (sec == NULL) 3526 return NULL; 3527 3528 section = bfd_mach_o_get_mach_o_section (sec); 3529 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3530 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3531 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3532 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3533 section->addr = bfd_h_get_64 (abfd, raw.addr); 3534 section->size = bfd_h_get_64 (abfd, raw.size); 3535 section->offset = bfd_h_get_32 (abfd, raw.offset); 3536 section->align = bfd_h_get_32 (abfd, raw.align); 3537 if (section->align > 64) 3538 { 3539 _bfd_error_handler 3540 (_("bfd_mach_o_read_section_64: overlarge alignment value: 0x%x, " 3541 "using 32 instead"), section->align); 3542 section->align = 32; 3543 } 3544 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3545 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3546 section->flags = bfd_h_get_32 (abfd, raw.flags); 3547 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3548 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3549 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3); 3550 3551 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3552 3553 return sec; 3554 } 3555 3556 static asection * 3557 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide) 3558 { 3559 if (wide) 3560 return bfd_mach_o_read_section_64 (abfd, prot); 3561 else 3562 return bfd_mach_o_read_section_32 (abfd, prot); 3563 } 3564 3565 static bfd_boolean 3566 bfd_mach_o_read_symtab_symbol (bfd *abfd, 3567 bfd_mach_o_symtab_command *sym, 3568 bfd_mach_o_asymbol *s, 3569 unsigned long i) 3570 { 3571 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3572 unsigned int wide = mach_o_wide_p (&mdata->header); 3573 unsigned int symwidth = 3574 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 3575 unsigned int symoff = sym->symoff + (i * symwidth); 3576 struct mach_o_nlist_64_external raw; 3577 unsigned char type = -1; 3578 unsigned char section = -1; 3579 short desc = -1; 3580 symvalue value = -1; 3581 unsigned long stroff = -1; 3582 unsigned int symtype = -1; 3583 3584 BFD_ASSERT (sym->strtab != NULL); 3585 3586 if (bfd_seek (abfd, symoff, SEEK_SET) != 0 3587 || bfd_bread (&raw, symwidth, abfd) != symwidth) 3588 { 3589 _bfd_error_handler 3590 /* xgettext:c-format */ 3591 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"), 3592 symwidth, (unsigned long) symoff); 3593 return FALSE; 3594 } 3595 3596 stroff = bfd_h_get_32 (abfd, raw.n_strx); 3597 type = bfd_h_get_8 (abfd, raw.n_type); 3598 symtype = type & BFD_MACH_O_N_TYPE; 3599 section = bfd_h_get_8 (abfd, raw.n_sect); 3600 desc = bfd_h_get_16 (abfd, raw.n_desc); 3601 if (wide) 3602 value = bfd_h_get_64 (abfd, raw.n_value); 3603 else 3604 value = bfd_h_get_32 (abfd, raw.n_value); 3605 3606 if (stroff >= sym->strsize) 3607 { 3608 _bfd_error_handler 3609 /* xgettext:c-format */ 3610 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"), 3611 (unsigned long) stroff, 3612 (unsigned long) sym->strsize); 3613 return FALSE; 3614 } 3615 3616 s->symbol.the_bfd = abfd; 3617 s->symbol.name = sym->strtab + stroff; 3618 s->symbol.value = value; 3619 s->symbol.flags = 0x0; 3620 s->symbol.udata.i = i; 3621 s->n_type = type; 3622 s->n_sect = section; 3623 s->n_desc = desc; 3624 3625 if (type & BFD_MACH_O_N_STAB) 3626 { 3627 s->symbol.flags |= BSF_DEBUGGING; 3628 s->symbol.section = bfd_und_section_ptr; 3629 switch (type) 3630 { 3631 case N_FUN: 3632 case N_STSYM: 3633 case N_LCSYM: 3634 case N_BNSYM: 3635 case N_SLINE: 3636 case N_ENSYM: 3637 case N_ECOMM: 3638 case N_ECOML: 3639 case N_GSYM: 3640 if ((section > 0) && (section <= mdata->nsects)) 3641 { 3642 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3643 s->symbol.value = 3644 s->symbol.value - mdata->sections[section - 1]->addr; 3645 } 3646 break; 3647 } 3648 } 3649 else 3650 { 3651 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)) 3652 s->symbol.flags |= BSF_GLOBAL; 3653 else 3654 s->symbol.flags |= BSF_LOCAL; 3655 3656 switch (symtype) 3657 { 3658 case BFD_MACH_O_N_UNDF: 3659 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT) 3660 && s->symbol.value != 0) 3661 { 3662 /* A common symbol. */ 3663 s->symbol.section = bfd_com_section_ptr; 3664 s->symbol.flags = BSF_NO_FLAGS; 3665 } 3666 else 3667 { 3668 s->symbol.section = bfd_und_section_ptr; 3669 if (s->n_desc & BFD_MACH_O_N_WEAK_REF) 3670 s->symbol.flags |= BSF_WEAK; 3671 } 3672 break; 3673 case BFD_MACH_O_N_PBUD: 3674 s->symbol.section = bfd_und_section_ptr; 3675 break; 3676 case BFD_MACH_O_N_ABS: 3677 s->symbol.section = bfd_abs_section_ptr; 3678 break; 3679 case BFD_MACH_O_N_SECT: 3680 if ((section > 0) && (section <= mdata->nsects)) 3681 { 3682 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3683 s->symbol.value = 3684 s->symbol.value - mdata->sections[section - 1]->addr; 3685 } 3686 else 3687 { 3688 /* Mach-O uses 0 to mean "no section"; not an error. */ 3689 if (section != 0) 3690 { 3691 _bfd_error_handler 3692 /* xgettext:c-format */ 3693 (_("bfd_mach_o_read_symtab_symbol: " 3694 "symbol \"%s\" specified invalid section %d (max %lu): " 3695 "setting to undefined"), 3696 s->symbol.name, section, mdata->nsects); 3697 } 3698 s->symbol.section = bfd_und_section_ptr; 3699 } 3700 break; 3701 case BFD_MACH_O_N_INDR: 3702 /* FIXME: we don't follow the BFD convention as this indirect symbol 3703 won't be followed by the referenced one. This looks harmless 3704 unless we start using the linker. */ 3705 s->symbol.flags |= BSF_INDIRECT; 3706 s->symbol.section = bfd_ind_section_ptr; 3707 s->symbol.value = 0; 3708 break; 3709 default: 3710 _bfd_error_handler 3711 /* xgettext:c-format */ 3712 (_("bfd_mach_o_read_symtab_symbol: " 3713 "symbol \"%s\" specified invalid type field 0x%x: " 3714 "setting to undefined"), s->symbol.name, symtype); 3715 s->symbol.section = bfd_und_section_ptr; 3716 break; 3717 } 3718 } 3719 3720 return TRUE; 3721 } 3722 3723 bfd_boolean 3724 bfd_mach_o_read_symtab_strtab (bfd *abfd) 3725 { 3726 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3727 bfd_mach_o_symtab_command *sym = mdata->symtab; 3728 3729 /* Fail if there is no symtab. */ 3730 if (sym == NULL) 3731 return FALSE; 3732 3733 /* Success if already loaded. */ 3734 if (sym->strtab) 3735 return TRUE; 3736 3737 if (abfd->flags & BFD_IN_MEMORY) 3738 { 3739 struct bfd_in_memory *b; 3740 3741 b = (struct bfd_in_memory *) abfd->iostream; 3742 3743 if ((sym->stroff + sym->strsize) > b->size) 3744 { 3745 bfd_set_error (bfd_error_file_truncated); 3746 return FALSE; 3747 } 3748 sym->strtab = (char *) b->buffer + sym->stroff; 3749 } 3750 else 3751 { 3752 sym->strtab = bfd_alloc (abfd, sym->strsize + 1); 3753 if (sym->strtab == NULL) 3754 return FALSE; 3755 3756 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0 3757 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize) 3758 { 3759 /* PR 17512: file: 10888-1609-0.004. */ 3760 bfd_release (abfd, sym->strtab); 3761 sym->strtab = NULL; 3762 bfd_set_error (bfd_error_file_truncated); 3763 return FALSE; 3764 } 3765 /* Zero terminate the string table. */ 3766 sym->strtab[sym->strsize] = 0; 3767 } 3768 3769 return TRUE; 3770 } 3771 3772 bfd_boolean 3773 bfd_mach_o_read_symtab_symbols (bfd *abfd) 3774 { 3775 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3776 bfd_mach_o_symtab_command *sym = mdata->symtab; 3777 unsigned long i; 3778 3779 if (sym == NULL || sym->symbols) 3780 /* Return now if there are no symbols or if already loaded. */ 3781 return TRUE; 3782 3783 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol)); 3784 if (sym->symbols == NULL) 3785 { 3786 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: " 3787 "unable to allocate memory for symbols")); 3788 sym->nsyms = 0; 3789 return FALSE; 3790 } 3791 3792 if (!bfd_mach_o_read_symtab_strtab (abfd)) 3793 goto fail; 3794 3795 for (i = 0; i < sym->nsyms; i++) 3796 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i)) 3797 goto fail; 3798 3799 return TRUE; 3800 3801 fail: 3802 bfd_release (abfd, sym->symbols); 3803 sym->symbols = NULL; 3804 sym->nsyms = 0; 3805 return FALSE; 3806 } 3807 3808 static const char * 3809 bfd_mach_o_i386_flavour_string (unsigned int flavour) 3810 { 3811 switch ((int) flavour) 3812 { 3813 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32"; 3814 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32"; 3815 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32"; 3816 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64"; 3817 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64"; 3818 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64"; 3819 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE"; 3820 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE"; 3821 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE"; 3822 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32"; 3823 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64"; 3824 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE"; 3825 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE"; 3826 default: return "UNKNOWN"; 3827 } 3828 } 3829 3830 static const char * 3831 bfd_mach_o_ppc_flavour_string (unsigned int flavour) 3832 { 3833 switch ((int) flavour) 3834 { 3835 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE"; 3836 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE"; 3837 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE"; 3838 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE"; 3839 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64"; 3840 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64"; 3841 default: return "UNKNOWN"; 3842 } 3843 } 3844 3845 static bfd_boolean 3846 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command) 3847 { 3848 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 3849 struct mach_o_str_command_external raw; 3850 unsigned int nameoff; 3851 unsigned int namelen; 3852 3853 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3854 return FALSE; 3855 3856 nameoff = bfd_h_get_32 (abfd, raw.str); 3857 3858 cmd->name_offset = nameoff; 3859 namelen = command->len - nameoff; 3860 nameoff += command->offset; 3861 cmd->name_str = bfd_alloc (abfd, namelen); 3862 if (cmd->name_str == NULL) 3863 return FALSE; 3864 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0 3865 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 3866 return FALSE; 3867 return TRUE; 3868 } 3869 3870 static bfd_boolean 3871 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) 3872 { 3873 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3874 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 3875 struct mach_o_dylib_command_external raw; 3876 unsigned int nameoff; 3877 unsigned int namelen; 3878 3879 switch (command->type) 3880 { 3881 case BFD_MACH_O_LC_LOAD_DYLIB: 3882 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 3883 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 3884 case BFD_MACH_O_LC_ID_DYLIB: 3885 case BFD_MACH_O_LC_REEXPORT_DYLIB: 3886 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 3887 break; 3888 default: 3889 BFD_FAIL (); 3890 return FALSE; 3891 } 3892 3893 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3894 return FALSE; 3895 3896 nameoff = bfd_h_get_32 (abfd, raw.name); 3897 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp); 3898 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version); 3899 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version); 3900 3901 cmd->name_offset = command->offset + nameoff; 3902 namelen = command->len - nameoff; 3903 cmd->name_str = bfd_alloc (abfd, namelen); 3904 if (cmd->name_str == NULL) 3905 return FALSE; 3906 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0 3907 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 3908 return FALSE; 3909 return TRUE; 3910 } 3911 3912 static bfd_boolean 3913 bfd_mach_o_read_prebound_dylib (bfd *abfd, 3914 bfd_mach_o_load_command *command) 3915 { 3916 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; 3917 struct mach_o_prebound_dylib_command_external raw; 3918 unsigned int nameoff; 3919 unsigned int modoff; 3920 unsigned int str_len; 3921 unsigned char *str; 3922 3923 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3924 return FALSE; 3925 3926 nameoff = bfd_h_get_32 (abfd, raw.name); 3927 modoff = bfd_h_get_32 (abfd, raw.linked_modules); 3928 if (nameoff > command->len || modoff > command->len) 3929 return FALSE; 3930 3931 str_len = command->len - sizeof (raw); 3932 str = bfd_alloc (abfd, str_len); 3933 if (str == NULL) 3934 return FALSE; 3935 if (bfd_bread (str, str_len, abfd) != str_len) 3936 return FALSE; 3937 3938 cmd->name_offset = command->offset + nameoff; 3939 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules); 3940 cmd->linked_modules_offset = command->offset + modoff; 3941 3942 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 3943 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 3944 return TRUE; 3945 } 3946 3947 static bfd_boolean 3948 bfd_mach_o_read_prebind_cksum (bfd *abfd, 3949 bfd_mach_o_load_command *command) 3950 { 3951 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum; 3952 struct mach_o_prebind_cksum_command_external raw; 3953 3954 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3955 return FALSE; 3956 3957 cmd->cksum = bfd_get_32 (abfd, raw.cksum); 3958 return TRUE; 3959 } 3960 3961 static bfd_boolean 3962 bfd_mach_o_read_twolevel_hints (bfd *abfd, 3963 bfd_mach_o_load_command *command) 3964 { 3965 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints; 3966 struct mach_o_twolevel_hints_command_external raw; 3967 3968 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3969 return FALSE; 3970 3971 cmd->offset = bfd_get_32 (abfd, raw.offset); 3972 cmd->nhints = bfd_get_32 (abfd, raw.nhints); 3973 return TRUE; 3974 } 3975 3976 static bfd_boolean 3977 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command) 3978 { 3979 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib; 3980 struct mach_o_fvmlib_command_external raw; 3981 unsigned int nameoff; 3982 unsigned int namelen; 3983 3984 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3985 return FALSE; 3986 3987 nameoff = bfd_h_get_32 (abfd, raw.name); 3988 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version); 3989 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr); 3990 3991 fvm->name_offset = command->offset + nameoff; 3992 namelen = command->len - nameoff; 3993 fvm->name_str = bfd_alloc (abfd, namelen); 3994 if (fvm->name_str == NULL) 3995 return FALSE; 3996 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0 3997 || bfd_bread (fvm->name_str, namelen, abfd) != namelen) 3998 return FALSE; 3999 return TRUE; 4000 } 4001 4002 static bfd_boolean 4003 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command) 4004 { 4005 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4006 bfd_mach_o_thread_command *cmd = &command->command.thread; 4007 unsigned int offset; 4008 unsigned int nflavours; 4009 unsigned int i; 4010 4011 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 4012 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 4013 4014 /* Count the number of threads. */ 4015 offset = 8; 4016 nflavours = 0; 4017 while (offset != command->len) 4018 { 4019 struct mach_o_thread_command_external raw; 4020 4021 if (offset >= command->len) 4022 return FALSE; 4023 4024 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4025 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4026 return FALSE; 4027 4028 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4; 4029 nflavours++; 4030 } 4031 4032 /* Allocate threads. */ 4033 cmd->flavours = bfd_alloc2 4034 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour)); 4035 if (cmd->flavours == NULL) 4036 return FALSE; 4037 cmd->nflavours = nflavours; 4038 4039 offset = 8; 4040 nflavours = 0; 4041 while (offset != command->len) 4042 { 4043 struct mach_o_thread_command_external raw; 4044 4045 if (offset >= command->len) 4046 return FALSE; 4047 4048 if (nflavours >= cmd->nflavours) 4049 return FALSE; 4050 4051 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4052 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4053 return FALSE; 4054 4055 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour); 4056 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw); 4057 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4; 4058 offset += cmd->flavours[nflavours].size + sizeof (raw); 4059 nflavours++; 4060 } 4061 4062 for (i = 0; i < nflavours; i++) 4063 { 4064 asection *bfdsec; 4065 unsigned int snamelen; 4066 char *sname; 4067 const char *flavourstr; 4068 const char *prefix = "LC_THREAD"; 4069 unsigned int j = 0; 4070 4071 switch (mdata->header.cputype) 4072 { 4073 case BFD_MACH_O_CPU_TYPE_POWERPC: 4074 case BFD_MACH_O_CPU_TYPE_POWERPC_64: 4075 flavourstr = 4076 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); 4077 break; 4078 case BFD_MACH_O_CPU_TYPE_I386: 4079 case BFD_MACH_O_CPU_TYPE_X86_64: 4080 flavourstr = 4081 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour); 4082 break; 4083 default: 4084 flavourstr = "UNKNOWN_ARCHITECTURE"; 4085 break; 4086 } 4087 4088 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1; 4089 sname = bfd_alloc (abfd, snamelen); 4090 if (sname == NULL) 4091 return FALSE; 4092 4093 for (;;) 4094 { 4095 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); 4096 if (bfd_get_section_by_name (abfd, sname) == NULL) 4097 break; 4098 j++; 4099 } 4100 4101 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS); 4102 4103 bfdsec->vma = 0; 4104 bfdsec->lma = 0; 4105 bfdsec->size = cmd->flavours[i].size; 4106 bfdsec->filepos = cmd->flavours[i].offset; 4107 bfdsec->alignment_power = 0x0; 4108 4109 cmd->section = bfdsec; 4110 } 4111 4112 return TRUE; 4113 } 4114 4115 static bfd_boolean 4116 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 4117 { 4118 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; 4119 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4120 4121 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 4122 4123 { 4124 struct mach_o_dysymtab_command_external raw; 4125 4126 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4127 return FALSE; 4128 4129 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym); 4130 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym); 4131 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym); 4132 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym); 4133 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym); 4134 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym); 4135 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff); 4136 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc); 4137 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff); 4138 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab); 4139 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff); 4140 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms); 4141 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff); 4142 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms); 4143 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff); 4144 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel); 4145 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff); 4146 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel); 4147 } 4148 4149 if (cmd->nmodtab != 0) 4150 { 4151 unsigned int i; 4152 int wide = bfd_mach_o_wide_p (abfd); 4153 unsigned int module_len = wide ? 56 : 52; 4154 4155 cmd->dylib_module = 4156 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module)); 4157 if (cmd->dylib_module == NULL) 4158 return FALSE; 4159 4160 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) 4161 return FALSE; 4162 4163 for (i = 0; i < cmd->nmodtab; i++) 4164 { 4165 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; 4166 unsigned long v; 4167 unsigned char buf[56]; 4168 4169 if (bfd_bread ((void *) buf, module_len, abfd) != module_len) 4170 return FALSE; 4171 4172 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0); 4173 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4); 4174 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8); 4175 module->irefsym = bfd_h_get_32 (abfd, buf + 12); 4176 module->nrefsym = bfd_h_get_32 (abfd, buf + 16); 4177 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20); 4178 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24); 4179 module->iextrel = bfd_h_get_32 (abfd, buf + 28); 4180 module->nextrel = bfd_h_get_32 (abfd, buf + 32); 4181 v = bfd_h_get_32 (abfd, buf +36); 4182 module->iinit = v & 0xffff; 4183 module->iterm = (v >> 16) & 0xffff; 4184 v = bfd_h_get_32 (abfd, buf + 40); 4185 module->ninit = v & 0xffff; 4186 module->nterm = (v >> 16) & 0xffff; 4187 if (wide) 4188 { 4189 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44); 4190 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48); 4191 } 4192 else 4193 { 4194 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44); 4195 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48); 4196 } 4197 } 4198 } 4199 4200 if (cmd->ntoc != 0) 4201 { 4202 unsigned long i; 4203 4204 cmd->dylib_toc = bfd_alloc2 4205 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content)); 4206 if (cmd->dylib_toc == NULL) 4207 return FALSE; 4208 4209 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) 4210 return FALSE; 4211 4212 for (i = 0; i < cmd->ntoc; i++) 4213 { 4214 struct mach_o_dylib_table_of_contents_external raw; 4215 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; 4216 4217 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4218 return FALSE; 4219 4220 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index); 4221 toc->module_index = bfd_h_get_32 (abfd, raw.module_index); 4222 } 4223 } 4224 4225 if (cmd->nindirectsyms != 0) 4226 { 4227 unsigned int i; 4228 4229 cmd->indirect_syms = bfd_alloc2 4230 (abfd, cmd->nindirectsyms, sizeof (unsigned int)); 4231 if (cmd->indirect_syms == NULL) 4232 return FALSE; 4233 4234 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) 4235 return FALSE; 4236 4237 for (i = 0; i < cmd->nindirectsyms; i++) 4238 { 4239 unsigned char raw[4]; 4240 unsigned int *is = &cmd->indirect_syms[i]; 4241 4242 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4243 return FALSE; 4244 4245 *is = bfd_h_get_32 (abfd, raw); 4246 } 4247 } 4248 4249 if (cmd->nextrefsyms != 0) 4250 { 4251 unsigned long v; 4252 unsigned int i; 4253 4254 cmd->ext_refs = bfd_alloc2 4255 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference)); 4256 if (cmd->ext_refs == NULL) 4257 return FALSE; 4258 4259 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) 4260 return FALSE; 4261 4262 for (i = 0; i < cmd->nextrefsyms; i++) 4263 { 4264 unsigned char raw[4]; 4265 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; 4266 4267 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4268 return FALSE; 4269 4270 /* Fields isym and flags are written as bit-fields, thus we need 4271 a specific processing for endianness. */ 4272 v = bfd_h_get_32 (abfd, raw); 4273 if (bfd_big_endian (abfd)) 4274 { 4275 ref->isym = (v >> 8) & 0xffffff; 4276 ref->flags = v & 0xff; 4277 } 4278 else 4279 { 4280 ref->isym = v & 0xffffff; 4281 ref->flags = (v >> 24) & 0xff; 4282 } 4283 } 4284 } 4285 4286 if (mdata->dysymtab) 4287 return FALSE; 4288 mdata->dysymtab = cmd; 4289 4290 return TRUE; 4291 } 4292 4293 static bfd_boolean 4294 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) 4295 { 4296 bfd_mach_o_symtab_command *symtab = &command->command.symtab; 4297 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4298 struct mach_o_symtab_command_external raw; 4299 4300 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 4301 4302 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4303 return FALSE; 4304 4305 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff); 4306 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms); 4307 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff); 4308 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize); 4309 symtab->symbols = NULL; 4310 symtab->strtab = NULL; 4311 4312 if (symtab->nsyms != 0) 4313 abfd->flags |= HAS_SYMS; 4314 4315 if (mdata->symtab) 4316 return FALSE; 4317 mdata->symtab = symtab; 4318 return TRUE; 4319 } 4320 4321 static bfd_boolean 4322 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command) 4323 { 4324 bfd_mach_o_uuid_command *cmd = &command->command.uuid; 4325 4326 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID); 4327 4328 if (bfd_bread (cmd->uuid, 16, abfd) != 16) 4329 return FALSE; 4330 4331 return TRUE; 4332 } 4333 4334 static bfd_boolean 4335 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command) 4336 { 4337 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit; 4338 struct mach_o_linkedit_data_command_external raw; 4339 4340 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4341 return FALSE; 4342 4343 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff); 4344 cmd->datasize = bfd_get_32 (abfd, raw.datasize); 4345 return TRUE; 4346 } 4347 4348 static bfd_boolean 4349 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command) 4350 { 4351 bfd_mach_o_str_command *cmd = &command->command.str; 4352 struct mach_o_str_command_external raw; 4353 unsigned long off; 4354 4355 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4356 return FALSE; 4357 4358 off = bfd_get_32 (abfd, raw.str); 4359 cmd->stroff = command->offset + off; 4360 cmd->str_len = command->len - off; 4361 cmd->str = bfd_alloc (abfd, cmd->str_len); 4362 if (cmd->str == NULL) 4363 return FALSE; 4364 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0 4365 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len) 4366 return FALSE; 4367 return TRUE; 4368 } 4369 4370 static unsigned char * 4371 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size) 4372 { 4373 unsigned char *buf; 4374 4375 buf = bfd_alloc (abfd, size); 4376 if (buf == NULL) 4377 return NULL; 4378 if (bfd_seek (abfd, off, SEEK_SET) != 0 4379 || bfd_bread (buf, size, abfd) != size) 4380 return NULL; 4381 return buf; 4382 } 4383 4384 static bfd_boolean 4385 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd) 4386 { 4387 /* Read rebase content. */ 4388 if (cmd->rebase_content == NULL && cmd->rebase_size != 0) 4389 { 4390 cmd->rebase_content = 4391 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size); 4392 if (cmd->rebase_content == NULL) 4393 return FALSE; 4394 } 4395 4396 /* Read bind content. */ 4397 if (cmd->bind_content == NULL && cmd->bind_size != 0) 4398 { 4399 cmd->bind_content = 4400 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size); 4401 if (cmd->bind_content == NULL) 4402 return FALSE; 4403 } 4404 4405 /* Read weak bind content. */ 4406 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0) 4407 { 4408 cmd->weak_bind_content = bfd_mach_o_alloc_and_read 4409 (abfd, cmd->weak_bind_off, cmd->weak_bind_size); 4410 if (cmd->weak_bind_content == NULL) 4411 return FALSE; 4412 } 4413 4414 /* Read lazy bind content. */ 4415 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0) 4416 { 4417 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read 4418 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size); 4419 if (cmd->lazy_bind_content == NULL) 4420 return FALSE; 4421 } 4422 4423 /* Read export content. */ 4424 if (cmd->export_content == NULL && cmd->export_size != 0) 4425 { 4426 cmd->export_content = bfd_mach_o_alloc_and_read 4427 (abfd, cmd->export_off, cmd->export_size); 4428 if (cmd->export_content == NULL) 4429 return FALSE; 4430 } 4431 4432 return TRUE; 4433 } 4434 4435 static bfd_boolean 4436 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) 4437 { 4438 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; 4439 struct mach_o_dyld_info_command_external raw; 4440 4441 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4442 return FALSE; 4443 4444 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off); 4445 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size); 4446 cmd->rebase_content = NULL; 4447 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off); 4448 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size); 4449 cmd->bind_content = NULL; 4450 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off); 4451 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size); 4452 cmd->weak_bind_content = NULL; 4453 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off); 4454 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size); 4455 cmd->lazy_bind_content = NULL; 4456 cmd->export_off = bfd_get_32 (abfd, raw.export_off); 4457 cmd->export_size = bfd_get_32 (abfd, raw.export_size); 4458 cmd->export_content = NULL; 4459 return TRUE; 4460 } 4461 4462 static bfd_boolean 4463 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command) 4464 { 4465 bfd_mach_o_version_min_command *cmd = &command->command.version_min; 4466 struct mach_o_version_min_command_external raw; 4467 unsigned int ver; 4468 4469 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4470 return FALSE; 4471 4472 ver = bfd_get_32 (abfd, raw.version); 4473 cmd->rel = ver >> 16; 4474 cmd->maj = ver >> 8; 4475 cmd->min = ver; 4476 cmd->reserved = bfd_get_32 (abfd, raw.reserved); 4477 return TRUE; 4478 } 4479 4480 static bfd_boolean 4481 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command) 4482 { 4483 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4484 struct mach_o_encryption_info_command_external raw; 4485 4486 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4487 return FALSE; 4488 4489 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4490 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4491 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4492 return TRUE; 4493 } 4494 4495 static bfd_boolean 4496 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command) 4497 { 4498 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4499 struct mach_o_encryption_info_64_command_external raw; 4500 4501 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4502 return FALSE; 4503 4504 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4505 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4506 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4507 return TRUE; 4508 } 4509 4510 static bfd_boolean 4511 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command) 4512 { 4513 bfd_mach_o_main_command *cmd = &command->command.main; 4514 struct mach_o_entry_point_command_external raw; 4515 4516 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4517 return FALSE; 4518 4519 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff); 4520 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize); 4521 return TRUE; 4522 } 4523 4524 static bfd_boolean 4525 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command) 4526 { 4527 bfd_mach_o_source_version_command *cmd = &command->command.source_version; 4528 struct mach_o_source_version_command_external raw; 4529 bfd_uint64_t ver; 4530 4531 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4532 return FALSE; 4533 4534 ver = bfd_get_64 (abfd, raw.version); 4535 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc 4536 generates warnings) in case of the host doesn't support 64 bit 4537 integers. */ 4538 cmd->e = ver & 0x3ff; 4539 ver >>= 10; 4540 cmd->d = ver & 0x3ff; 4541 ver >>= 10; 4542 cmd->c = ver & 0x3ff; 4543 ver >>= 10; 4544 cmd->b = ver & 0x3ff; 4545 ver >>= 10; 4546 cmd->a = ver & 0xffffff; 4547 return TRUE; 4548 } 4549 4550 static bfd_boolean 4551 bfd_mach_o_read_segment (bfd *abfd, 4552 bfd_mach_o_load_command *command, 4553 unsigned int wide) 4554 { 4555 bfd_mach_o_segment_command *seg = &command->command.segment; 4556 unsigned long i; 4557 4558 if (wide) 4559 { 4560 struct mach_o_segment_command_64_external raw; 4561 4562 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); 4563 4564 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4565 return FALSE; 4566 4567 memcpy (seg->segname, raw.segname, 16); 4568 seg->segname[16] = '\0'; 4569 4570 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr); 4571 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize); 4572 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff); 4573 seg->filesize = bfd_h_get_64 (abfd, raw.filesize); 4574 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4575 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4576 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4577 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4578 } 4579 else 4580 { 4581 struct mach_o_segment_command_32_external raw; 4582 4583 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 4584 4585 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4586 return FALSE; 4587 4588 memcpy (seg->segname, raw.segname, 16); 4589 seg->segname[16] = '\0'; 4590 4591 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr); 4592 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize); 4593 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff); 4594 seg->filesize = bfd_h_get_32 (abfd, raw.filesize); 4595 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4596 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4597 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4598 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4599 } 4600 seg->sect_head = NULL; 4601 seg->sect_tail = NULL; 4602 4603 for (i = 0; i < seg->nsects; i++) 4604 { 4605 asection *sec; 4606 4607 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide); 4608 if (sec == NULL) 4609 return FALSE; 4610 4611 bfd_mach_o_append_section_to_segment 4612 (seg, bfd_mach_o_get_mach_o_section (sec)); 4613 } 4614 4615 return TRUE; 4616 } 4617 4618 static bfd_boolean 4619 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) 4620 { 4621 return bfd_mach_o_read_segment (abfd, command, 0); 4622 } 4623 4624 static bfd_boolean 4625 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) 4626 { 4627 return bfd_mach_o_read_segment (abfd, command, 1); 4628 } 4629 4630 static bfd_boolean 4631 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command) 4632 { 4633 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4634 struct mach_o_load_command_external raw; 4635 unsigned int cmd; 4636 4637 /* Read command type and length. */ 4638 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0 4639 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE) 4640 return FALSE; 4641 4642 cmd = bfd_h_get_32 (abfd, raw.cmd); 4643 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD; 4644 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE; 4645 command->len = bfd_h_get_32 (abfd, raw.cmdsize); 4646 4647 switch (command->type) 4648 { 4649 case BFD_MACH_O_LC_SEGMENT: 4650 if (!bfd_mach_o_read_segment_32 (abfd, command)) 4651 return FALSE; 4652 break; 4653 case BFD_MACH_O_LC_SEGMENT_64: 4654 if (!bfd_mach_o_read_segment_64 (abfd, command)) 4655 return FALSE; 4656 break; 4657 case BFD_MACH_O_LC_SYMTAB: 4658 if (!bfd_mach_o_read_symtab (abfd, command)) 4659 return FALSE; 4660 break; 4661 case BFD_MACH_O_LC_SYMSEG: 4662 break; 4663 case BFD_MACH_O_LC_THREAD: 4664 case BFD_MACH_O_LC_UNIXTHREAD: 4665 if (!bfd_mach_o_read_thread (abfd, command)) 4666 return FALSE; 4667 break; 4668 case BFD_MACH_O_LC_LOAD_DYLINKER: 4669 case BFD_MACH_O_LC_ID_DYLINKER: 4670 case BFD_MACH_O_LC_DYLD_ENVIRONMENT: 4671 if (!bfd_mach_o_read_dylinker (abfd, command)) 4672 return FALSE; 4673 break; 4674 case BFD_MACH_O_LC_LOAD_DYLIB: 4675 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 4676 case BFD_MACH_O_LC_ID_DYLIB: 4677 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 4678 case BFD_MACH_O_LC_REEXPORT_DYLIB: 4679 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 4680 if (!bfd_mach_o_read_dylib (abfd, command)) 4681 return FALSE; 4682 break; 4683 case BFD_MACH_O_LC_PREBOUND_DYLIB: 4684 if (!bfd_mach_o_read_prebound_dylib (abfd, command)) 4685 return FALSE; 4686 break; 4687 case BFD_MACH_O_LC_LOADFVMLIB: 4688 case BFD_MACH_O_LC_IDFVMLIB: 4689 if (!bfd_mach_o_read_fvmlib (abfd, command)) 4690 return FALSE; 4691 break; 4692 case BFD_MACH_O_LC_IDENT: 4693 case BFD_MACH_O_LC_FVMFILE: 4694 case BFD_MACH_O_LC_PREPAGE: 4695 case BFD_MACH_O_LC_ROUTINES: 4696 case BFD_MACH_O_LC_ROUTINES_64: 4697 break; 4698 case BFD_MACH_O_LC_SUB_FRAMEWORK: 4699 case BFD_MACH_O_LC_SUB_UMBRELLA: 4700 case BFD_MACH_O_LC_SUB_LIBRARY: 4701 case BFD_MACH_O_LC_SUB_CLIENT: 4702 case BFD_MACH_O_LC_RPATH: 4703 if (!bfd_mach_o_read_str (abfd, command)) 4704 return FALSE; 4705 break; 4706 case BFD_MACH_O_LC_DYSYMTAB: 4707 if (!bfd_mach_o_read_dysymtab (abfd, command)) 4708 return FALSE; 4709 break; 4710 case BFD_MACH_O_LC_PREBIND_CKSUM: 4711 if (!bfd_mach_o_read_prebind_cksum (abfd, command)) 4712 return FALSE; 4713 break; 4714 case BFD_MACH_O_LC_TWOLEVEL_HINTS: 4715 if (!bfd_mach_o_read_twolevel_hints (abfd, command)) 4716 return FALSE; 4717 break; 4718 case BFD_MACH_O_LC_UUID: 4719 if (!bfd_mach_o_read_uuid (abfd, command)) 4720 return FALSE; 4721 break; 4722 case BFD_MACH_O_LC_CODE_SIGNATURE: 4723 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO: 4724 case BFD_MACH_O_LC_FUNCTION_STARTS: 4725 case BFD_MACH_O_LC_DATA_IN_CODE: 4726 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS: 4727 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT: 4728 if (!bfd_mach_o_read_linkedit (abfd, command)) 4729 return FALSE; 4730 break; 4731 case BFD_MACH_O_LC_ENCRYPTION_INFO: 4732 if (!bfd_mach_o_read_encryption_info (abfd, command)) 4733 return FALSE; 4734 break; 4735 case BFD_MACH_O_LC_ENCRYPTION_INFO_64: 4736 if (!bfd_mach_o_read_encryption_info_64 (abfd, command)) 4737 return FALSE; 4738 break; 4739 case BFD_MACH_O_LC_DYLD_INFO: 4740 if (!bfd_mach_o_read_dyld_info (abfd, command)) 4741 return FALSE; 4742 break; 4743 case BFD_MACH_O_LC_VERSION_MIN_MACOSX: 4744 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS: 4745 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS: 4746 if (!bfd_mach_o_read_version_min (abfd, command)) 4747 return FALSE; 4748 break; 4749 case BFD_MACH_O_LC_MAIN: 4750 if (!bfd_mach_o_read_main (abfd, command)) 4751 return FALSE; 4752 break; 4753 case BFD_MACH_O_LC_SOURCE_VERSION: 4754 if (!bfd_mach_o_read_source_version (abfd, command)) 4755 return FALSE; 4756 break; 4757 default: 4758 command->len = 0; 4759 _bfd_error_handler (_("%B: unknown load command 0x%lx"), 4760 abfd, (unsigned long) command->type); 4761 return FALSE; 4762 } 4763 4764 return TRUE; 4765 } 4766 4767 static void 4768 bfd_mach_o_flatten_sections (bfd *abfd) 4769 { 4770 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4771 bfd_mach_o_load_command *cmd; 4772 long csect = 0; 4773 4774 /* Count total number of sections. */ 4775 mdata->nsects = 0; 4776 4777 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4778 { 4779 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4780 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4781 { 4782 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4783 4784 mdata->nsects += seg->nsects; 4785 } 4786 } 4787 4788 /* Allocate sections array. */ 4789 mdata->sections = bfd_alloc2 (abfd, 4790 mdata->nsects, sizeof (bfd_mach_o_section *)); 4791 4792 /* Fill the array. */ 4793 csect = 0; 4794 4795 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4796 { 4797 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4798 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4799 { 4800 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4801 bfd_mach_o_section *sec; 4802 4803 BFD_ASSERT (csect + seg->nsects <= mdata->nsects); 4804 4805 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 4806 mdata->sections[csect++] = sec; 4807 } 4808 } 4809 } 4810 4811 static bfd_boolean 4812 bfd_mach_o_scan_start_address (bfd *abfd) 4813 { 4814 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4815 bfd_mach_o_thread_command *thr = NULL; 4816 bfd_mach_o_load_command *cmd; 4817 unsigned long i; 4818 4819 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4820 if (cmd->type == BFD_MACH_O_LC_THREAD 4821 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD) 4822 { 4823 thr = &cmd->command.thread; 4824 break; 4825 } 4826 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1) 4827 { 4828 bfd_mach_o_main_command *main_cmd = &cmd->command.main; 4829 bfd_mach_o_section *text_sect = mdata->sections[0]; 4830 4831 if (text_sect) 4832 { 4833 abfd->start_address = main_cmd->entryoff 4834 + (text_sect->addr - text_sect->offset); 4835 return TRUE; 4836 } 4837 } 4838 4839 /* An object file has no start address, so do not fail if not found. */ 4840 if (thr == NULL) 4841 return TRUE; 4842 4843 /* FIXME: create a subtarget hook ? */ 4844 for (i = 0; i < thr->nflavours; i++) 4845 { 4846 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386) 4847 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32)) 4848 { 4849 unsigned char buf[4]; 4850 4851 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0 4852 || bfd_bread (buf, 4, abfd) != 4) 4853 return FALSE; 4854 4855 abfd->start_address = bfd_h_get_32 (abfd, buf); 4856 } 4857 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC) 4858 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE)) 4859 { 4860 unsigned char buf[4]; 4861 4862 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 4863 || bfd_bread (buf, 4, abfd) != 4) 4864 return FALSE; 4865 4866 abfd->start_address = bfd_h_get_32 (abfd, buf); 4867 } 4868 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64) 4869 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64)) 4870 { 4871 unsigned char buf[8]; 4872 4873 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 4874 || bfd_bread (buf, 8, abfd) != 8) 4875 return FALSE; 4876 4877 abfd->start_address = bfd_h_get_64 (abfd, buf); 4878 } 4879 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64) 4880 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64)) 4881 { 4882 unsigned char buf[8]; 4883 4884 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0 4885 || bfd_bread (buf, 8, abfd) != 8) 4886 return FALSE; 4887 4888 abfd->start_address = bfd_h_get_64 (abfd, buf); 4889 } 4890 } 4891 4892 return TRUE; 4893 } 4894 4895 bfd_boolean 4896 bfd_mach_o_set_arch_mach (bfd *abfd, 4897 enum bfd_architecture arch, 4898 unsigned long machine) 4899 { 4900 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 4901 4902 /* If this isn't the right architecture for this backend, and this 4903 isn't the generic backend, fail. */ 4904 if (arch != bed->arch 4905 && arch != bfd_arch_unknown 4906 && bed->arch != bfd_arch_unknown) 4907 return FALSE; 4908 4909 return bfd_default_set_arch_mach (abfd, arch, machine); 4910 } 4911 4912 static bfd_boolean 4913 bfd_mach_o_scan (bfd *abfd, 4914 bfd_mach_o_header *header, 4915 bfd_mach_o_data_struct *mdata) 4916 { 4917 unsigned int i; 4918 enum bfd_architecture cputype; 4919 unsigned long cpusubtype; 4920 unsigned int hdrsize; 4921 4922 hdrsize = mach_o_wide_p (header) ? 4923 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 4924 4925 mdata->header = *header; 4926 4927 abfd->flags = abfd->flags & BFD_IN_MEMORY; 4928 switch (header->filetype) 4929 { 4930 case BFD_MACH_O_MH_OBJECT: 4931 abfd->flags |= HAS_RELOC; 4932 break; 4933 case BFD_MACH_O_MH_EXECUTE: 4934 abfd->flags |= EXEC_P; 4935 break; 4936 case BFD_MACH_O_MH_DYLIB: 4937 case BFD_MACH_O_MH_BUNDLE: 4938 abfd->flags |= DYNAMIC; 4939 break; 4940 } 4941 4942 abfd->tdata.mach_o_data = mdata; 4943 4944 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, 4945 &cputype, &cpusubtype); 4946 if (cputype == bfd_arch_unknown) 4947 { 4948 _bfd_error_handler 4949 /* xgettext:c-format */ 4950 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"), 4951 header->cputype, header->cpusubtype); 4952 return FALSE; 4953 } 4954 4955 bfd_set_arch_mach (abfd, cputype, cpusubtype); 4956 4957 if (header->ncmds != 0) 4958 { 4959 bfd_mach_o_load_command *cmd; 4960 4961 mdata->first_command = NULL; 4962 mdata->last_command = NULL; 4963 4964 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command)); 4965 if (cmd == NULL) 4966 return FALSE; 4967 4968 for (i = 0; i < header->ncmds; i++) 4969 { 4970 bfd_mach_o_load_command *cur = &cmd[i]; 4971 4972 bfd_mach_o_append_command (abfd, cur); 4973 4974 if (i == 0) 4975 cur->offset = hdrsize; 4976 else 4977 { 4978 bfd_mach_o_load_command *prev = &cmd[i - 1]; 4979 cur->offset = prev->offset + prev->len; 4980 } 4981 4982 if (!bfd_mach_o_read_command (abfd, cur)) 4983 return FALSE; 4984 } 4985 } 4986 4987 /* Sections should be flatten before scanning start address. */ 4988 bfd_mach_o_flatten_sections (abfd); 4989 if (!bfd_mach_o_scan_start_address (abfd)) 4990 return FALSE; 4991 4992 return TRUE; 4993 } 4994 4995 bfd_boolean 4996 bfd_mach_o_mkobject_init (bfd *abfd) 4997 { 4998 bfd_mach_o_data_struct *mdata = NULL; 4999 5000 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); 5001 if (mdata == NULL) 5002 return FALSE; 5003 abfd->tdata.mach_o_data = mdata; 5004 5005 mdata->header.magic = 0; 5006 mdata->header.cputype = 0; 5007 mdata->header.cpusubtype = 0; 5008 mdata->header.filetype = 0; 5009 mdata->header.ncmds = 0; 5010 mdata->header.sizeofcmds = 0; 5011 mdata->header.flags = 0; 5012 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN; 5013 mdata->first_command = NULL; 5014 mdata->last_command = NULL; 5015 mdata->nsects = 0; 5016 mdata->sections = NULL; 5017 mdata->dyn_reloc_cache = NULL; 5018 5019 return TRUE; 5020 } 5021 5022 static bfd_boolean 5023 bfd_mach_o_gen_mkobject (bfd *abfd) 5024 { 5025 bfd_mach_o_data_struct *mdata; 5026 5027 if (!bfd_mach_o_mkobject_init (abfd)) 5028 return FALSE; 5029 5030 mdata = bfd_mach_o_get_data (abfd); 5031 mdata->header.magic = BFD_MACH_O_MH_MAGIC; 5032 mdata->header.cputype = 0; 5033 mdata->header.cpusubtype = 0; 5034 mdata->header.byteorder = abfd->xvec->byteorder; 5035 mdata->header.version = 1; 5036 5037 return TRUE; 5038 } 5039 5040 const bfd_target * 5041 bfd_mach_o_header_p (bfd *abfd, 5042 file_ptr hdr_off, 5043 bfd_mach_o_filetype filetype, 5044 bfd_mach_o_cpu_type cputype) 5045 { 5046 bfd_mach_o_header header; 5047 bfd_mach_o_data_struct *mdata; 5048 5049 if (!bfd_mach_o_read_header (abfd, hdr_off, &header)) 5050 goto wrong; 5051 5052 if (! (header.byteorder == BFD_ENDIAN_BIG 5053 || header.byteorder == BFD_ENDIAN_LITTLE)) 5054 { 5055 _bfd_error_handler (_("unknown header byte-order value 0x%lx"), 5056 (unsigned long) header.byteorder); 5057 goto wrong; 5058 } 5059 5060 if (! ((header.byteorder == BFD_ENDIAN_BIG 5061 && abfd->xvec->byteorder == BFD_ENDIAN_BIG 5062 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) 5063 || (header.byteorder == BFD_ENDIAN_LITTLE 5064 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE 5065 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) 5066 goto wrong; 5067 5068 /* Check cputype and filetype. 5069 In case of wildcard, do not accept magics that are handled by existing 5070 targets. */ 5071 if (cputype) 5072 { 5073 if (header.cputype != cputype) 5074 goto wrong; 5075 } 5076 else 5077 { 5078 #ifndef BFD64 5079 /* Do not recognize 64 architectures if not configured for 64bit targets. 5080 This could happen only for generic targets. */ 5081 if (mach_o_wide_p (&header)) 5082 goto wrong; 5083 #endif 5084 } 5085 5086 if (filetype) 5087 { 5088 if (header.filetype != filetype) 5089 goto wrong; 5090 } 5091 else 5092 { 5093 switch (header.filetype) 5094 { 5095 case BFD_MACH_O_MH_CORE: 5096 /* Handled by core_p */ 5097 goto wrong; 5098 default: 5099 break; 5100 } 5101 } 5102 5103 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata)); 5104 if (mdata == NULL) 5105 goto fail; 5106 mdata->hdr_offset = hdr_off; 5107 5108 if (!bfd_mach_o_scan (abfd, &header, mdata)) 5109 goto wrong; 5110 5111 return abfd->xvec; 5112 5113 wrong: 5114 bfd_set_error (bfd_error_wrong_format); 5115 5116 fail: 5117 return NULL; 5118 } 5119 5120 static const bfd_target * 5121 bfd_mach_o_gen_object_p (bfd *abfd) 5122 { 5123 return bfd_mach_o_header_p (abfd, 0, 0, 0); 5124 } 5125 5126 static const bfd_target * 5127 bfd_mach_o_gen_core_p (bfd *abfd) 5128 { 5129 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0); 5130 } 5131 5132 /* Return the base address of ABFD, ie the address at which the image is 5133 mapped. The possible initial pagezero is ignored. */ 5134 5135 bfd_vma 5136 bfd_mach_o_get_base_address (bfd *abfd) 5137 { 5138 bfd_mach_o_data_struct *mdata; 5139 bfd_mach_o_load_command *cmd; 5140 5141 /* Check for Mach-O. */ 5142 if (!bfd_mach_o_valid (abfd)) 5143 return 0; 5144 mdata = bfd_mach_o_get_data (abfd); 5145 5146 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5147 { 5148 if ((cmd->type == BFD_MACH_O_LC_SEGMENT 5149 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)) 5150 { 5151 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment; 5152 5153 if (segcmd->initprot != 0) 5154 return segcmd->vmaddr; 5155 } 5156 } 5157 return 0; 5158 } 5159 5160 typedef struct mach_o_fat_archentry 5161 { 5162 unsigned long cputype; 5163 unsigned long cpusubtype; 5164 unsigned long offset; 5165 unsigned long size; 5166 unsigned long align; 5167 } mach_o_fat_archentry; 5168 5169 typedef struct mach_o_fat_data_struct 5170 { 5171 unsigned long magic; 5172 unsigned long nfat_arch; 5173 mach_o_fat_archentry *archentries; 5174 } mach_o_fat_data_struct; 5175 5176 const bfd_target * 5177 bfd_mach_o_fat_archive_p (bfd *abfd) 5178 { 5179 mach_o_fat_data_struct *adata = NULL; 5180 struct mach_o_fat_header_external hdr; 5181 unsigned long i; 5182 5183 if (bfd_seek (abfd, 0, SEEK_SET) != 0 5184 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr)) 5185 goto error; 5186 5187 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); 5188 if (adata == NULL) 5189 goto error; 5190 5191 adata->magic = bfd_getb32 (hdr.magic); 5192 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch); 5193 if (adata->magic != 0xcafebabe) 5194 goto error; 5195 /* Avoid matching Java bytecode files, which have the same magic number. 5196 In the Java bytecode file format this field contains the JVM version, 5197 which starts at 43.0. */ 5198 if (adata->nfat_arch > 30) 5199 goto error; 5200 5201 adata->archentries = 5202 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry)); 5203 if (adata->archentries == NULL) 5204 goto error; 5205 5206 for (i = 0; i < adata->nfat_arch; i++) 5207 { 5208 struct mach_o_fat_arch_external arch; 5209 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch)) 5210 goto error; 5211 adata->archentries[i].cputype = bfd_getb32 (arch.cputype); 5212 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype); 5213 adata->archentries[i].offset = bfd_getb32 (arch.offset); 5214 adata->archentries[i].size = bfd_getb32 (arch.size); 5215 adata->archentries[i].align = bfd_getb32 (arch.align); 5216 } 5217 5218 abfd->tdata.mach_o_fat_data = adata; 5219 5220 return abfd->xvec; 5221 5222 error: 5223 if (adata != NULL) 5224 bfd_release (abfd, adata); 5225 bfd_set_error (bfd_error_wrong_format); 5226 return NULL; 5227 } 5228 5229 /* Set the filename for a fat binary member ABFD, whose bfd architecture is 5230 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY. 5231 Set arelt_data and origin fields too. */ 5232 5233 static void 5234 bfd_mach_o_fat_member_init (bfd *abfd, 5235 enum bfd_architecture arch_type, 5236 unsigned long arch_subtype, 5237 mach_o_fat_archentry *entry) 5238 { 5239 struct areltdata *areltdata; 5240 /* Create the member filename. Use ARCH_NAME. */ 5241 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype); 5242 5243 if (ap) 5244 { 5245 /* Use the architecture name if known. */ 5246 abfd->filename = xstrdup (ap->printable_name); 5247 } 5248 else 5249 { 5250 /* Forge a uniq id. */ 5251 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1; 5252 char *name = xmalloc (namelen); 5253 snprintf (name, namelen, "0x%lx-0x%lx", 5254 entry->cputype, entry->cpusubtype); 5255 abfd->filename = name; 5256 } 5257 5258 areltdata = bfd_zmalloc (sizeof (struct areltdata)); 5259 areltdata->parsed_size = entry->size; 5260 abfd->arelt_data = areltdata; 5261 abfd->iostream = NULL; 5262 abfd->origin = entry->offset; 5263 } 5264 5265 bfd * 5266 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev) 5267 { 5268 mach_o_fat_data_struct *adata; 5269 mach_o_fat_archentry *entry = NULL; 5270 unsigned long i; 5271 bfd *nbfd; 5272 enum bfd_architecture arch_type; 5273 unsigned long arch_subtype; 5274 5275 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; 5276 BFD_ASSERT (adata != NULL); 5277 5278 /* Find index of previous entry. */ 5279 if (prev == NULL) 5280 { 5281 /* Start at first one. */ 5282 i = 0; 5283 } 5284 else 5285 { 5286 /* Find index of PREV. */ 5287 for (i = 0; i < adata->nfat_arch; i++) 5288 { 5289 if (adata->archentries[i].offset == prev->origin) 5290 break; 5291 } 5292 5293 if (i == adata->nfat_arch) 5294 { 5295 /* Not found. */ 5296 bfd_set_error (bfd_error_bad_value); 5297 return NULL; 5298 } 5299 5300 /* Get next entry. */ 5301 i++; 5302 } 5303 5304 if (i >= adata->nfat_arch) 5305 { 5306 bfd_set_error (bfd_error_no_more_archived_files); 5307 return NULL; 5308 } 5309 5310 entry = &adata->archentries[i]; 5311 nbfd = _bfd_new_bfd_contained_in (archive); 5312 if (nbfd == NULL) 5313 return NULL; 5314 5315 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype, 5316 &arch_type, &arch_subtype); 5317 5318 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry); 5319 5320 bfd_set_arch_mach (nbfd, arch_type, arch_subtype); 5321 5322 return nbfd; 5323 } 5324 5325 /* Analogous to stat call. */ 5326 5327 static int 5328 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf) 5329 { 5330 if (abfd->arelt_data == NULL) 5331 { 5332 bfd_set_error (bfd_error_invalid_operation); 5333 return -1; 5334 } 5335 5336 buf->st_mtime = 0; 5337 buf->st_uid = 0; 5338 buf->st_gid = 0; 5339 buf->st_mode = 0644; 5340 buf->st_size = arelt_size (abfd); 5341 5342 return 0; 5343 } 5344 5345 /* If ABFD format is FORMAT and architecture is ARCH, return it. 5346 If ABFD is a fat image containing a member that corresponds to FORMAT 5347 and ARCH, returns it. 5348 In other case, returns NULL. 5349 This function allows transparent uses of fat images. */ 5350 5351 bfd * 5352 bfd_mach_o_fat_extract (bfd *abfd, 5353 bfd_format format, 5354 const bfd_arch_info_type *arch) 5355 { 5356 bfd *res; 5357 mach_o_fat_data_struct *adata; 5358 unsigned int i; 5359 5360 if (bfd_check_format (abfd, format)) 5361 { 5362 if (bfd_get_arch_info (abfd) == arch) 5363 return abfd; 5364 return NULL; 5365 } 5366 if (!bfd_check_format (abfd, bfd_archive) 5367 || abfd->xvec != &mach_o_fat_vec) 5368 return NULL; 5369 5370 /* This is a Mach-O fat image. */ 5371 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data; 5372 BFD_ASSERT (adata != NULL); 5373 5374 for (i = 0; i < adata->nfat_arch; i++) 5375 { 5376 struct mach_o_fat_archentry *e = &adata->archentries[i]; 5377 enum bfd_architecture cpu_type; 5378 unsigned long cpu_subtype; 5379 5380 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype, 5381 &cpu_type, &cpu_subtype); 5382 if (cpu_type != arch->arch || cpu_subtype != arch->mach) 5383 continue; 5384 5385 /* The architecture is found. */ 5386 res = _bfd_new_bfd_contained_in (abfd); 5387 if (res == NULL) 5388 return NULL; 5389 5390 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e); 5391 5392 if (bfd_check_format (res, format)) 5393 { 5394 BFD_ASSERT (bfd_get_arch_info (res) == arch); 5395 return res; 5396 } 5397 bfd_close (res); 5398 return NULL; 5399 } 5400 5401 return NULL; 5402 } 5403 5404 int 5405 bfd_mach_o_lookup_command (bfd *abfd, 5406 bfd_mach_o_load_command_type type, 5407 bfd_mach_o_load_command **mcommand) 5408 { 5409 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5410 struct bfd_mach_o_load_command *cmd; 5411 unsigned int num; 5412 5413 BFD_ASSERT (mdata != NULL); 5414 BFD_ASSERT (mcommand != NULL); 5415 5416 num = 0; 5417 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5418 { 5419 if (cmd->type != type) 5420 continue; 5421 5422 if (num == 0) 5423 *mcommand = cmd; 5424 num++; 5425 } 5426 5427 return num; 5428 } 5429 5430 unsigned long 5431 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type) 5432 { 5433 switch (type) 5434 { 5435 case BFD_MACH_O_CPU_TYPE_MC680x0: 5436 return 0x04000000; 5437 case BFD_MACH_O_CPU_TYPE_MC88000: 5438 return 0xffffe000; 5439 case BFD_MACH_O_CPU_TYPE_POWERPC: 5440 return 0xc0000000; 5441 case BFD_MACH_O_CPU_TYPE_I386: 5442 return 0xc0000000; 5443 case BFD_MACH_O_CPU_TYPE_SPARC: 5444 return 0xf0000000; 5445 case BFD_MACH_O_CPU_TYPE_I860: 5446 return 0; 5447 case BFD_MACH_O_CPU_TYPE_HPPA: 5448 return 0xc0000000 - 0x04000000; 5449 default: 5450 return 0; 5451 } 5452 } 5453 5454 /* The following two tables should be kept, as far as possible, in order of 5455 most frequently used entries to optimize their use from gas. */ 5456 5457 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] = 5458 { 5459 { "regular", BFD_MACH_O_S_REGULAR}, 5460 { "coalesced", BFD_MACH_O_S_COALESCED}, 5461 { "zerofill", BFD_MACH_O_S_ZEROFILL}, 5462 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS}, 5463 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS}, 5464 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS}, 5465 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS}, 5466 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS}, 5467 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS}, 5468 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS}, 5469 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL}, 5470 { "interposing", BFD_MACH_O_S_INTERPOSING}, 5471 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF}, 5472 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS}, 5473 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS}, 5474 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS}, 5475 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS}, 5476 { NULL, 0} 5477 }; 5478 5479 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] = 5480 { 5481 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS }, 5482 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS }, 5483 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC }, 5484 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC }, 5485 { "debug", BFD_MACH_O_S_ATTR_DEBUG }, 5486 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT }, 5487 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP }, 5488 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS }, 5489 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC }, 5490 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5491 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5492 { NULL, 0} 5493 }; 5494 5495 /* Get the section type from NAME. Return 256 if NAME is unknown. */ 5496 5497 unsigned int 5498 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name) 5499 { 5500 const bfd_mach_o_xlat_name *x; 5501 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 5502 5503 for (x = bfd_mach_o_section_type_name; x->name; x++) 5504 if (strcmp (x->name, name) == 0) 5505 { 5506 /* We found it... does the target support it? */ 5507 if (bed->bfd_mach_o_section_type_valid_for_target == NULL 5508 || bed->bfd_mach_o_section_type_valid_for_target (x->val)) 5509 return x->val; /* OK. */ 5510 else 5511 break; /* Not supported. */ 5512 } 5513 /* Maximum section ID = 0xff. */ 5514 return 256; 5515 } 5516 5517 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */ 5518 5519 unsigned int 5520 bfd_mach_o_get_section_attribute_from_name (const char *name) 5521 { 5522 const bfd_mach_o_xlat_name *x; 5523 5524 for (x = bfd_mach_o_section_attribute_name; x->name; x++) 5525 if (strcmp (x->name, name) == 0) 5526 return x->val; 5527 return (unsigned int)-1; 5528 } 5529 5530 int 5531 bfd_mach_o_core_fetch_environment (bfd *abfd, 5532 unsigned char **rbuf, 5533 unsigned int *rlen) 5534 { 5535 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5536 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype); 5537 bfd_mach_o_load_command *cmd; 5538 5539 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5540 { 5541 bfd_mach_o_segment_command *seg; 5542 5543 if (cmd->type != BFD_MACH_O_LC_SEGMENT) 5544 continue; 5545 5546 seg = &cmd->command.segment; 5547 5548 if ((seg->vmaddr + seg->vmsize) == stackaddr) 5549 { 5550 unsigned long start = seg->fileoff; 5551 unsigned long end = seg->fileoff + seg->filesize; 5552 unsigned char *buf = bfd_malloc (1024); 5553 unsigned long size = 1024; 5554 5555 for (;;) 5556 { 5557 bfd_size_type nread = 0; 5558 unsigned long offset; 5559 int found_nonnull = 0; 5560 5561 if (size > (end - start)) 5562 size = (end - start); 5563 5564 buf = bfd_realloc_or_free (buf, size); 5565 if (buf == NULL) 5566 return -1; 5567 5568 if (bfd_seek (abfd, end - size, SEEK_SET) != 0) 5569 { 5570 free (buf); 5571 return -1; 5572 } 5573 5574 nread = bfd_bread (buf, size, abfd); 5575 5576 if (nread != size) 5577 { 5578 free (buf); 5579 return -1; 5580 } 5581 5582 for (offset = 4; offset <= size; offset += 4) 5583 { 5584 unsigned long val; 5585 5586 val = *((unsigned long *) (buf + size - offset)); 5587 if (! found_nonnull) 5588 { 5589 if (val != 0) 5590 found_nonnull = 1; 5591 } 5592 else if (val == 0x0) 5593 { 5594 unsigned long bottom; 5595 unsigned long top; 5596 5597 bottom = seg->fileoff + seg->filesize - offset; 5598 top = seg->fileoff + seg->filesize - 4; 5599 *rbuf = bfd_malloc (top - bottom); 5600 *rlen = top - bottom; 5601 5602 memcpy (*rbuf, buf + size - *rlen, *rlen); 5603 free (buf); 5604 return 0; 5605 } 5606 } 5607 5608 if (size == (end - start)) 5609 break; 5610 5611 size *= 2; 5612 } 5613 5614 free (buf); 5615 } 5616 } 5617 5618 return -1; 5619 } 5620 5621 char * 5622 bfd_mach_o_core_file_failing_command (bfd *abfd) 5623 { 5624 unsigned char *buf = NULL; 5625 unsigned int len = 0; 5626 int ret; 5627 5628 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len); 5629 if (ret < 0) 5630 return NULL; 5631 5632 return (char *) buf; 5633 } 5634 5635 int 5636 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 5637 { 5638 return 0; 5639 } 5640 5641 static bfd_mach_o_uuid_command * 5642 bfd_mach_o_lookup_uuid_command (bfd *abfd) 5643 { 5644 bfd_mach_o_load_command *uuid_cmd = NULL; 5645 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd); 5646 if (ncmd != 1 || uuid_cmd == NULL) 5647 return FALSE; 5648 return &uuid_cmd->command.uuid; 5649 } 5650 5651 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */ 5652 5653 static bfd_boolean 5654 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd) 5655 { 5656 bfd_mach_o_uuid_command *dsym_uuid_cmd; 5657 5658 BFD_ASSERT (abfd); 5659 BFD_ASSERT (uuid_cmd); 5660 5661 if (!bfd_check_format (abfd, bfd_object)) 5662 return FALSE; 5663 5664 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour 5665 || bfd_mach_o_get_data (abfd) == NULL 5666 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM) 5667 return FALSE; 5668 5669 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5670 if (dsym_uuid_cmd == NULL) 5671 return FALSE; 5672 5673 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid, 5674 sizeof (uuid_cmd->uuid)) != 0) 5675 return FALSE; 5676 5677 return TRUE; 5678 } 5679 5680 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD. 5681 The caller is responsible for closing the returned BFD object and 5682 its my_archive if the returned BFD is in a fat dSYM. */ 5683 5684 static bfd * 5685 bfd_mach_o_find_dsym (const char *dsym_filename, 5686 const bfd_mach_o_uuid_command *uuid_cmd, 5687 const bfd_arch_info_type *arch) 5688 { 5689 bfd *base_dsym_bfd, *dsym_bfd; 5690 5691 BFD_ASSERT (uuid_cmd); 5692 5693 base_dsym_bfd = bfd_openr (dsym_filename, NULL); 5694 if (base_dsym_bfd == NULL) 5695 return NULL; 5696 5697 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch); 5698 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd)) 5699 return dsym_bfd; 5700 5701 bfd_close (dsym_bfd); 5702 if (base_dsym_bfd != dsym_bfd) 5703 bfd_close (base_dsym_bfd); 5704 5705 return NULL; 5706 } 5707 5708 /* Return a BFD created from a dSYM file for ABFD. 5709 The caller is responsible for closing the returned BFD object, its 5710 filename, and its my_archive if the returned BFD is in a fat dSYM. */ 5711 5712 static bfd * 5713 bfd_mach_o_follow_dsym (bfd *abfd) 5714 { 5715 char *dsym_filename; 5716 bfd_mach_o_uuid_command *uuid_cmd; 5717 bfd *dsym_bfd, *base_bfd = abfd; 5718 const char *base_basename; 5719 5720 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour) 5721 return NULL; 5722 5723 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive)) 5724 base_bfd = abfd->my_archive; 5725 /* BFD may have been opened from a stream. */ 5726 if (base_bfd->filename == NULL) 5727 { 5728 bfd_set_error (bfd_error_invalid_operation); 5729 return NULL; 5730 } 5731 base_basename = lbasename (base_bfd->filename); 5732 5733 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5734 if (uuid_cmd == NULL) 5735 return NULL; 5736 5737 /* TODO: We assume the DWARF file has the same as the binary's. 5738 It seems apple's GDB checks all files in the dSYM bundle directory. 5739 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c 5740 */ 5741 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename) 5742 + strlen (dsym_subdir) + 1 5743 + strlen (base_basename) + 1); 5744 sprintf (dsym_filename, "%s%s/%s", 5745 base_bfd->filename, dsym_subdir, base_basename); 5746 5747 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd, 5748 bfd_get_arch_info (abfd)); 5749 if (dsym_bfd == NULL) 5750 free (dsym_filename); 5751 5752 return dsym_bfd; 5753 } 5754 5755 bfd_boolean 5756 bfd_mach_o_find_nearest_line (bfd *abfd, 5757 asymbol **symbols, 5758 asection *section, 5759 bfd_vma offset, 5760 const char **filename_ptr, 5761 const char **functionname_ptr, 5762 unsigned int *line_ptr, 5763 unsigned int *discriminator_ptr) 5764 { 5765 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5766 if (mdata == NULL) 5767 return FALSE; 5768 switch (mdata->header.filetype) 5769 { 5770 case BFD_MACH_O_MH_OBJECT: 5771 break; 5772 case BFD_MACH_O_MH_EXECUTE: 5773 case BFD_MACH_O_MH_DYLIB: 5774 case BFD_MACH_O_MH_BUNDLE: 5775 case BFD_MACH_O_MH_KEXT_BUNDLE: 5776 if (mdata->dwarf2_find_line_info == NULL) 5777 { 5778 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd); 5779 /* When we couldn't find dSYM for this binary, we look for 5780 the debug information in the binary itself. In this way, 5781 we won't try finding separated dSYM again because 5782 mdata->dwarf2_find_line_info will be filled. */ 5783 if (! mdata->dsym_bfd) 5784 break; 5785 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd, 5786 dwarf_debug_sections, symbols, 5787 &mdata->dwarf2_find_line_info, 5788 FALSE)) 5789 return FALSE; 5790 } 5791 break; 5792 default: 5793 return FALSE; 5794 } 5795 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, 5796 filename_ptr, functionname_ptr, 5797 line_ptr, discriminator_ptr, 5798 dwarf_debug_sections, 0, 5799 &mdata->dwarf2_find_line_info); 5800 } 5801 5802 bfd_boolean 5803 bfd_mach_o_close_and_cleanup (bfd *abfd) 5804 { 5805 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5806 if (bfd_get_format (abfd) == bfd_object && mdata != NULL) 5807 { 5808 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info); 5809 bfd_mach_o_free_cached_info (abfd); 5810 if (mdata->dsym_bfd != NULL) 5811 { 5812 bfd *fat_bfd = mdata->dsym_bfd->my_archive; 5813 #if 0 5814 /* FIXME: PR 19435: This calculation to find the memory allocated by 5815 bfd_mach_o_follow_dsym for the filename does not always end up 5816 selecting the correct pointer. Unfortunately this problem is 5817 very hard to reproduce on a non Mach-O native system, so until it 5818 can be traced and fixed on such a system, this code will remain 5819 commented out. This does mean that there will be a memory leak, 5820 but it is small, and happens when we are closing down, so it 5821 should not matter too much. */ 5822 char *dsym_filename = (char *)(fat_bfd 5823 ? fat_bfd->filename 5824 : mdata->dsym_bfd->filename); 5825 #endif 5826 bfd_close (mdata->dsym_bfd); 5827 mdata->dsym_bfd = NULL; 5828 if (fat_bfd) 5829 bfd_close (fat_bfd); 5830 #if 0 5831 free (dsym_filename); 5832 #endif 5833 } 5834 } 5835 5836 return _bfd_generic_close_and_cleanup (abfd); 5837 } 5838 5839 bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd) 5840 { 5841 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5842 asection *asect; 5843 free (mdata->dyn_reloc_cache); 5844 mdata->dyn_reloc_cache = NULL; 5845 for (asect = abfd->sections; asect != NULL; asect = asect->next) 5846 { 5847 free (asect->relocation); 5848 asect->relocation = NULL; 5849 } 5850 5851 return TRUE; 5852 } 5853 5854 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 5855 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup 5856 5857 #define bfd_mach_o_canonicalize_one_reloc NULL 5858 #define bfd_mach_o_swap_reloc_out NULL 5859 #define bfd_mach_o_print_thread NULL 5860 #define bfd_mach_o_tgt_seg_table NULL 5861 #define bfd_mach_o_section_type_valid_for_tgt NULL 5862 5863 #define TARGET_NAME mach_o_be_vec 5864 #define TARGET_STRING "mach-o-be" 5865 #define TARGET_ARCHITECTURE bfd_arch_unknown 5866 #define TARGET_PAGESIZE 1 5867 #define TARGET_BIG_ENDIAN 1 5868 #define TARGET_ARCHIVE 0 5869 #define TARGET_PRIORITY 1 5870 #include "mach-o-target.c" 5871 5872 #undef TARGET_NAME 5873 #undef TARGET_STRING 5874 #undef TARGET_ARCHITECTURE 5875 #undef TARGET_PAGESIZE 5876 #undef TARGET_BIG_ENDIAN 5877 #undef TARGET_ARCHIVE 5878 #undef TARGET_PRIORITY 5879 5880 #define TARGET_NAME mach_o_le_vec 5881 #define TARGET_STRING "mach-o-le" 5882 #define TARGET_ARCHITECTURE bfd_arch_unknown 5883 #define TARGET_PAGESIZE 1 5884 #define TARGET_BIG_ENDIAN 0 5885 #define TARGET_ARCHIVE 0 5886 #define TARGET_PRIORITY 1 5887 5888 #include "mach-o-target.c" 5889 5890 #undef TARGET_NAME 5891 #undef TARGET_STRING 5892 #undef TARGET_ARCHITECTURE 5893 #undef TARGET_PAGESIZE 5894 #undef TARGET_BIG_ENDIAN 5895 #undef TARGET_ARCHIVE 5896 #undef TARGET_PRIORITY 5897 5898 /* Not yet handled: creating an archive. */ 5899 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive 5900 5901 #define bfd_mach_o_close_and_cleanup bfd_true 5902 5903 /* Not used. */ 5904 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt 5905 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file 5906 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p 5907 5908 #define TARGET_NAME mach_o_fat_vec 5909 #define TARGET_STRING "mach-o-fat" 5910 #define TARGET_ARCHITECTURE bfd_arch_unknown 5911 #define TARGET_PAGESIZE 1 5912 #define TARGET_BIG_ENDIAN 1 5913 #define TARGET_ARCHIVE 1 5914 #define TARGET_PRIORITY 0 5915 5916 #include "mach-o-target.c" 5917 5918 #undef TARGET_NAME 5919 #undef TARGET_STRING 5920 #undef TARGET_ARCHITECTURE 5921 #undef TARGET_PAGESIZE 5922 #undef TARGET_BIG_ENDIAN 5923 #undef TARGET_ARCHIVE 5924 #undef TARGET_PRIORITY 5925