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