1 /* Mach-O support for BFD. 2 Copyright (C) 1999-2018 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "mach-o.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "libiberty.h" 26 #include "aout/stab_gnu.h" 27 #include "mach-o/reloc.h" 28 #include "mach-o/external.h" 29 #include <ctype.h> 30 #include <stdlib.h> 31 #include <string.h> 32 33 #define bfd_mach_o_object_p bfd_mach_o_gen_object_p 34 #define bfd_mach_o_core_p bfd_mach_o_gen_core_p 35 #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject 36 37 #define FILE_ALIGN(off, algn) \ 38 (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn))) 39 40 static bfd_boolean 41 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd); 42 43 unsigned int 44 bfd_mach_o_version (bfd *abfd) 45 { 46 bfd_mach_o_data_struct *mdata = NULL; 47 48 BFD_ASSERT (bfd_mach_o_valid (abfd)); 49 mdata = bfd_mach_o_get_data (abfd); 50 51 return mdata->header.version; 52 } 53 54 bfd_boolean 55 bfd_mach_o_valid (bfd *abfd) 56 { 57 if (abfd == NULL || abfd->xvec == NULL) 58 return FALSE; 59 60 if (abfd->xvec->flavour != bfd_target_mach_o_flavour) 61 return FALSE; 62 63 if (bfd_mach_o_get_data (abfd) == NULL) 64 return FALSE; 65 return TRUE; 66 } 67 68 static INLINE bfd_boolean 69 mach_o_wide_p (bfd_mach_o_header *header) 70 { 71 switch (header->version) 72 { 73 case 1: 74 return FALSE; 75 case 2: 76 return TRUE; 77 default: 78 BFD_FAIL (); 79 return FALSE; 80 } 81 } 82 83 static INLINE bfd_boolean 84 bfd_mach_o_wide_p (bfd *abfd) 85 { 86 return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header); 87 } 88 89 /* Tables to translate well known Mach-O segment/section names to bfd 90 names. Use of canonical names (such as .text or .debug_frame) is required 91 by gdb. */ 92 93 /* __TEXT Segment. */ 94 static const mach_o_section_name_xlat text_section_names_xlat[] = 95 { 96 { ".text", "__text", 97 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 98 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0}, 99 { ".const", "__const", 100 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 101 BFD_MACH_O_S_ATTR_NONE, 0}, 102 { ".static_const", "__static_const", 103 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 104 BFD_MACH_O_S_ATTR_NONE, 0}, 105 { ".cstring", "__cstring", 106 SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS, 107 BFD_MACH_O_S_CSTRING_LITERALS, 108 BFD_MACH_O_S_ATTR_NONE, 0}, 109 { ".literal4", "__literal4", 110 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS, 111 BFD_MACH_O_S_ATTR_NONE, 2}, 112 { ".literal8", "__literal8", 113 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS, 114 BFD_MACH_O_S_ATTR_NONE, 3}, 115 { ".literal16", "__literal16", 116 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS, 117 BFD_MACH_O_S_ATTR_NONE, 4}, 118 { ".constructor", "__constructor", 119 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 120 BFD_MACH_O_S_ATTR_NONE, 0}, 121 { ".destructor", "__destructor", 122 SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, 123 BFD_MACH_O_S_ATTR_NONE, 0}, 124 { ".eh_frame", "__eh_frame", 125 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, 126 BFD_MACH_O_S_ATTR_LIVE_SUPPORT 127 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS 128 | BFD_MACH_O_S_ATTR_NO_TOC, 2}, 129 { NULL, NULL, 0, 0, 0, 0} 130 }; 131 132 /* __DATA Segment. */ 133 static const mach_o_section_name_xlat data_section_names_xlat[] = 134 { 135 { ".data", "__data", 136 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 137 BFD_MACH_O_S_ATTR_NONE, 0}, 138 { ".bss", "__bss", 139 SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL, 140 BFD_MACH_O_S_ATTR_NONE, 0}, 141 { ".const_data", "__const", 142 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 143 BFD_MACH_O_S_ATTR_NONE, 0}, 144 { ".static_data", "__static_data", 145 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 146 BFD_MACH_O_S_ATTR_NONE, 0}, 147 { ".mod_init_func", "__mod_init_func", 148 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS, 149 BFD_MACH_O_S_ATTR_NONE, 2}, 150 { ".mod_term_func", "__mod_term_func", 151 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS, 152 BFD_MACH_O_S_ATTR_NONE, 2}, 153 { ".dyld", "__dyld", 154 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 155 BFD_MACH_O_S_ATTR_NONE, 0}, 156 { ".cfstring", "__cfstring", 157 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 158 BFD_MACH_O_S_ATTR_NONE, 2}, 159 { NULL, NULL, 0, 0, 0, 0} 160 }; 161 162 /* __DWARF Segment. */ 163 static const mach_o_section_name_xlat dwarf_section_names_xlat[] = 164 { 165 { ".debug_frame", "__debug_frame", 166 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 167 BFD_MACH_O_S_ATTR_DEBUG, 0}, 168 { ".debug_info", "__debug_info", 169 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 170 BFD_MACH_O_S_ATTR_DEBUG, 0}, 171 { ".debug_abbrev", "__debug_abbrev", 172 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 173 BFD_MACH_O_S_ATTR_DEBUG, 0}, 174 { ".debug_aranges", "__debug_aranges", 175 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 176 BFD_MACH_O_S_ATTR_DEBUG, 0}, 177 { ".debug_macinfo", "__debug_macinfo", 178 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 179 BFD_MACH_O_S_ATTR_DEBUG, 0}, 180 { ".debug_line", "__debug_line", 181 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 182 BFD_MACH_O_S_ATTR_DEBUG, 0}, 183 { ".debug_loc", "__debug_loc", 184 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 185 BFD_MACH_O_S_ATTR_DEBUG, 0}, 186 { ".debug_pubnames", "__debug_pubnames", 187 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 188 BFD_MACH_O_S_ATTR_DEBUG, 0}, 189 { ".debug_pubtypes", "__debug_pubtypes", 190 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 191 BFD_MACH_O_S_ATTR_DEBUG, 0}, 192 { ".debug_str", "__debug_str", 193 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 194 BFD_MACH_O_S_ATTR_DEBUG, 0}, 195 { ".debug_ranges", "__debug_ranges", 196 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 197 BFD_MACH_O_S_ATTR_DEBUG, 0}, 198 { ".debug_macro", "__debug_macro", 199 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 200 BFD_MACH_O_S_ATTR_DEBUG, 0}, 201 { ".debug_gdb_scripts", "__debug_gdb_scri", 202 SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, 203 BFD_MACH_O_S_ATTR_DEBUG, 0}, 204 { NULL, NULL, 0, 0, 0, 0} 205 }; 206 207 /* __OBJC Segment. */ 208 static const mach_o_section_name_xlat objc_section_names_xlat[] = 209 { 210 { ".objc_class", "__class", 211 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 212 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 213 { ".objc_meta_class", "__meta_class", 214 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 215 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 216 { ".objc_cat_cls_meth", "__cat_cls_meth", 217 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 218 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 219 { ".objc_cat_inst_meth", "__cat_inst_meth", 220 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 221 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 222 { ".objc_protocol", "__protocol", 223 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 224 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 225 { ".objc_string_object", "__string_object", 226 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 227 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 228 { ".objc_cls_meth", "__cls_meth", 229 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 230 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 231 { ".objc_inst_meth", "__inst_meth", 232 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 233 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 234 { ".objc_cls_refs", "__cls_refs", 235 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, 236 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 237 { ".objc_message_refs", "__message_refs", 238 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, 239 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 240 { ".objc_symbols", "__symbols", 241 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 242 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 243 { ".objc_category", "__category", 244 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 245 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 246 { ".objc_class_vars", "__class_vars", 247 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 248 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 249 { ".objc_instance_vars", "__instance_vars", 250 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 251 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 252 { ".objc_module_info", "__module_info", 253 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 254 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 255 { ".objc_selector_strs", "__selector_strs", 256 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS, 257 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 258 { ".objc_image_info", "__image_info", 259 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 260 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 261 { ".objc_selector_fixup", "__sel_fixup", 262 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 263 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 264 /* Objc V1 */ 265 { ".objc1_class_ext", "__class_ext", 266 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 267 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 268 { ".objc1_property_list", "__property", 269 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 270 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 271 { ".objc1_protocol_ext", "__protocol_ext", 272 SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, 273 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, 274 { NULL, NULL, 0, 0, 0, 0} 275 }; 276 277 static const mach_o_segment_name_xlat segsec_names_xlat[] = 278 { 279 { "__TEXT", text_section_names_xlat }, 280 { "__DATA", data_section_names_xlat }, 281 { "__DWARF", dwarf_section_names_xlat }, 282 { "__OBJC", objc_section_names_xlat }, 283 { NULL, NULL } 284 }; 285 286 static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF"; 287 288 /* For both cases bfd-name => mach-o name and vice versa, the specific target 289 is checked before the generic. This allows a target (e.g. ppc for cstring) 290 to override the generic definition with a more specific one. */ 291 292 /* Fetch the translation from a Mach-O section designation (segment, section) 293 as a bfd short name, if one exists. Otherwise return NULL. 294 295 Allow the segment and section names to be unterminated 16 byte arrays. */ 296 297 const mach_o_section_name_xlat * 298 bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname, 299 const char *sectname) 300 { 301 const struct mach_o_segment_name_xlat *seg; 302 const mach_o_section_name_xlat *sec; 303 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 304 305 /* First try any target-specific translations defined... */ 306 if (bed->segsec_names_xlat) 307 for (seg = bed->segsec_names_xlat; seg->segname; seg++) 308 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) 309 for (sec = seg->sections; sec->mach_o_name; sec++) 310 if (strncmp (sec->mach_o_name, sectname, 311 BFD_MACH_O_SECTNAME_SIZE) == 0) 312 return sec; 313 314 /* ... and then the Mach-O generic ones. */ 315 for (seg = segsec_names_xlat; seg->segname; seg++) 316 if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) 317 for (sec = seg->sections; sec->mach_o_name; sec++) 318 if (strncmp (sec->mach_o_name, sectname, 319 BFD_MACH_O_SECTNAME_SIZE) == 0) 320 return sec; 321 322 return NULL; 323 } 324 325 /* If the bfd_name for this section is a 'canonical' form for which we 326 know the Mach-O data, return the segment name and the data for the 327 Mach-O equivalent. Otherwise return NULL. */ 328 329 const mach_o_section_name_xlat * 330 bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name, 331 const char **segname) 332 { 333 const struct mach_o_segment_name_xlat *seg; 334 const mach_o_section_name_xlat *sec; 335 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 336 *segname = NULL; 337 338 if (bfd_name[0] != '.') 339 return NULL; 340 341 /* First try any target-specific translations defined... */ 342 if (bed->segsec_names_xlat) 343 for (seg = bed->segsec_names_xlat; seg->segname; seg++) 344 for (sec = seg->sections; sec->bfd_name; sec++) 345 if (strcmp (bfd_name, sec->bfd_name) == 0) 346 { 347 *segname = seg->segname; 348 return sec; 349 } 350 351 /* ... and then the Mach-O generic ones. */ 352 for (seg = segsec_names_xlat; seg->segname; seg++) 353 for (sec = seg->sections; sec->bfd_name; sec++) 354 if (strcmp (bfd_name, sec->bfd_name) == 0) 355 { 356 *segname = seg->segname; 357 return sec; 358 } 359 360 return NULL; 361 } 362 363 /* Convert Mach-O section name to BFD. 364 365 Try to use standard/canonical names, for which we have tables including 366 default flag settings - which are returned. Otherwise forge a new name 367 in the form "<segmentname>.<sectionname>" this will be prefixed with 368 LC_SEGMENT. if the segment name does not begin with an underscore. 369 370 SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL- 371 terminated if the name length is exactly 16 bytes - but must be if the name 372 length is less than 16 characters). */ 373 374 void 375 bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname, 376 const char *secname, const char **name, 377 flagword *flags) 378 { 379 const mach_o_section_name_xlat *xlat; 380 char *res; 381 unsigned int len; 382 const char *pfx = ""; 383 384 *name = NULL; 385 *flags = SEC_NO_FLAGS; 386 387 /* First search for a canonical name... 388 xlat will be non-null if there is an entry for segname, secname. */ 389 xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname); 390 if (xlat) 391 { 392 len = strlen (xlat->bfd_name); 393 res = bfd_alloc (abfd, len + 1); 394 if (res == NULL) 395 return; 396 memcpy (res, xlat->bfd_name, len+1); 397 *name = res; 398 *flags = xlat->bfd_flags; 399 return; 400 } 401 402 /* ... else we make up a bfd name from the segment concatenated with the 403 section. */ 404 405 len = 16 + 1 + 16 + 1; 406 407 /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start 408 with an underscore. */ 409 if (segname[0] != '_') 410 { 411 static const char seg_pfx[] = "LC_SEGMENT."; 412 413 pfx = seg_pfx; 414 len += sizeof (seg_pfx) - 1; 415 } 416 417 res = bfd_alloc (abfd, len); 418 if (res == NULL) 419 return; 420 snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname); 421 *name = res; 422 } 423 424 /* Convert a bfd section name to a Mach-O segment + section name. 425 426 If the name is a canonical one for which we have a Darwin match 427 return the translation table - which contains defaults for flags, 428 type, attribute and default alignment data. 429 430 Otherwise, expand the bfd_name (assumed to be in the form 431 "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */ 432 433 static const mach_o_section_name_xlat * 434 bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED, 435 asection *sect, 436 bfd_mach_o_section *section) 437 { 438 const mach_o_section_name_xlat *xlat; 439 const char *name = bfd_get_section_name (abfd, sect); 440 const char *segname; 441 const char *dot; 442 unsigned int len; 443 unsigned int seglen; 444 unsigned int seclen; 445 446 memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1); 447 memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1); 448 449 /* See if is a canonical name ... */ 450 xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname); 451 if (xlat) 452 { 453 strcpy (section->segname, segname); 454 strcpy (section->sectname, xlat->mach_o_name); 455 return xlat; 456 } 457 458 /* .. else we convert our constructed one back to Mach-O. 459 Strip LC_SEGMENT. prefix, if present. */ 460 if (strncmp (name, "LC_SEGMENT.", 11) == 0) 461 name += 11; 462 463 /* Find a dot. */ 464 dot = strchr (name, '.'); 465 len = strlen (name); 466 467 /* Try to split name into segment and section names. */ 468 if (dot && dot != name) 469 { 470 seglen = dot - name; 471 seclen = len - (dot + 1 - name); 472 473 if (seglen <= BFD_MACH_O_SEGNAME_SIZE 474 && seclen <= BFD_MACH_O_SECTNAME_SIZE) 475 { 476 memcpy (section->segname, name, seglen); 477 section->segname[seglen] = 0; 478 memcpy (section->sectname, dot + 1, seclen); 479 section->sectname[seclen] = 0; 480 return NULL; 481 } 482 } 483 484 /* The segment and section names are both missing - don't make them 485 into dots. */ 486 if (dot && dot == name) 487 return NULL; 488 489 /* Just duplicate the name into both segment and section. */ 490 if (len > 16) 491 len = 16; 492 memcpy (section->segname, name, len); 493 section->segname[len] = 0; 494 memcpy (section->sectname, name, len); 495 section->sectname[len] = 0; 496 return NULL; 497 } 498 499 /* Return the size of an entry for section SEC. 500 Must be called only for symbol pointer section and symbol stubs 501 sections. */ 502 503 unsigned int 504 bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec) 505 { 506 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 507 { 508 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 509 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 510 return bfd_mach_o_wide_p (abfd) ? 8 : 4; 511 case BFD_MACH_O_S_SYMBOL_STUBS: 512 return sec->reserved2; 513 default: 514 BFD_FAIL (); 515 return 0; 516 } 517 } 518 519 /* Return the number of indirect symbols for a section. 520 Must be called only for symbol pointer section and symbol stubs 521 sections. */ 522 523 unsigned int 524 bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec) 525 { 526 unsigned int elsz; 527 528 elsz = bfd_mach_o_section_get_entry_size (abfd, sec); 529 if (elsz == 0) 530 return 0; 531 else 532 return sec->size / elsz; 533 } 534 535 /* Append command CMD to ABFD. Note that header.ncmds is not updated. */ 536 537 static void 538 bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd) 539 { 540 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 541 542 if (mdata->last_command != NULL) 543 mdata->last_command->next = cmd; 544 else 545 mdata->first_command = cmd; 546 mdata->last_command = cmd; 547 cmd->next = NULL; 548 } 549 550 /* Copy any private info we understand from the input symbol 551 to the output symbol. */ 552 553 bfd_boolean 554 bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, 555 asymbol *isymbol, 556 bfd *obfd ATTRIBUTE_UNUSED, 557 asymbol *osymbol) 558 { 559 bfd_mach_o_asymbol *os, *is; 560 561 os = (bfd_mach_o_asymbol *)osymbol; 562 is = (bfd_mach_o_asymbol *)isymbol; 563 os->n_type = is->n_type; 564 os->n_sect = is->n_sect; 565 os->n_desc = is->n_desc; 566 os->symbol.udata.i = is->symbol.udata.i; 567 568 return TRUE; 569 } 570 571 /* Copy any private info we understand from the input section 572 to the output section. */ 573 574 bfd_boolean 575 bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection, 576 bfd *obfd, asection *osection) 577 { 578 bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection); 579 bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection); 580 581 if (ibfd->xvec->flavour != bfd_target_mach_o_flavour 582 || obfd->xvec->flavour != bfd_target_mach_o_flavour) 583 return TRUE; 584 585 BFD_ASSERT (is != NULL && os != NULL); 586 587 os->flags = is->flags; 588 os->reserved1 = is->reserved1; 589 os->reserved2 = is->reserved2; 590 os->reserved3 = is->reserved3; 591 592 return TRUE; 593 } 594 595 static const char * 596 cputype (unsigned long value) 597 { 598 switch (value) 599 { 600 case BFD_MACH_O_CPU_TYPE_VAX: return "VAX"; 601 case BFD_MACH_O_CPU_TYPE_MC680x0: return "MC68k"; 602 case BFD_MACH_O_CPU_TYPE_I386: return "I386"; 603 case BFD_MACH_O_CPU_TYPE_MIPS: return "MIPS"; 604 case BFD_MACH_O_CPU_TYPE_MC98000: return "MC98k"; 605 case BFD_MACH_O_CPU_TYPE_HPPA: return "HPPA"; 606 case BFD_MACH_O_CPU_TYPE_ARM: return "ARM"; 607 case BFD_MACH_O_CPU_TYPE_MC88000: return "MC88K"; 608 case BFD_MACH_O_CPU_TYPE_SPARC: return "SPARC"; 609 case BFD_MACH_O_CPU_TYPE_I860: return "I860"; 610 case BFD_MACH_O_CPU_TYPE_ALPHA: return "ALPHA"; 611 case BFD_MACH_O_CPU_TYPE_POWERPC: return "PPC"; 612 case BFD_MACH_O_CPU_TYPE_POWERPC_64: return "PPC64"; 613 case BFD_MACH_O_CPU_TYPE_X86_64: return "X86_64"; 614 case BFD_MACH_O_CPU_TYPE_ARM64: return "ARM64"; 615 default: return _("<unknown>"); 616 } 617 } 618 619 static const char * 620 cpusubtype (unsigned long cputype, unsigned long cpusubtype) 621 { 622 static char buffer[128]; 623 624 buffer[0] = 0; 625 switch (cpusubtype & BFD_MACH_O_CPU_SUBTYPE_MASK) 626 { 627 case 0: 628 break; 629 case BFD_MACH_O_CPU_SUBTYPE_LIB64: 630 sprintf (buffer, " (LIB64)"); break; 631 default: 632 sprintf (buffer, _("<unknown mask flags>")); break; 633 } 634 635 cpusubtype &= ~ BFD_MACH_O_CPU_SUBTYPE_MASK; 636 637 switch (cputype) 638 { 639 case BFD_MACH_O_CPU_TYPE_X86_64: 640 case BFD_MACH_O_CPU_TYPE_I386: 641 switch (cpusubtype) 642 { 643 case BFD_MACH_O_CPU_SUBTYPE_X86_ALL: 644 return strcat (buffer, " (X86_ALL)"); 645 default: 646 break; 647 } 648 break; 649 650 case BFD_MACH_O_CPU_TYPE_ARM: 651 switch (cpusubtype) 652 { 653 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL: 654 return strcat (buffer, " (ARM_ALL)"); 655 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T: 656 return strcat (buffer, " (ARM_V4T)"); 657 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6: 658 return strcat (buffer, " (ARM_V6)"); 659 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ: 660 return strcat (buffer, " (ARM_V5TEJ)"); 661 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE: 662 return strcat (buffer, " (ARM_XSCALE)"); 663 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7: 664 return strcat (buffer, " (ARM_V7)"); 665 default: 666 break; 667 } 668 break; 669 670 case BFD_MACH_O_CPU_TYPE_ARM64: 671 switch (cpusubtype) 672 { 673 case BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL: 674 return strcat (buffer, " (ARM64_ALL)"); 675 case BFD_MACH_O_CPU_SUBTYPE_ARM64_V8: 676 return strcat (buffer, " (ARM64_V8)"); 677 default: 678 break; 679 } 680 break; 681 682 default: 683 break; 684 } 685 686 if (cpusubtype != 0) 687 return strcat (buffer, _(" (<unknown>)")); 688 689 return buffer; 690 } 691 692 bfd_boolean 693 bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, void *ptr) 694 { 695 FILE * file = (FILE *) ptr; 696 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 697 698 fprintf (file, _(" MACH-O header:\n")); 699 fprintf (file, _(" magic: %#lx\n"), (long) mdata->header.magic); 700 fprintf (file, _(" cputype: %#lx (%s)\n"), (long) mdata->header.cputype, 701 cputype (mdata->header.cputype)); 702 fprintf (file, _(" cpusubtype: %#lx%s\n"), (long) mdata->header.cpusubtype, 703 cpusubtype (mdata->header.cputype, mdata->header.cpusubtype)); 704 fprintf (file, _(" filetype: %#lx\n"), (long) mdata->header.filetype); 705 fprintf (file, _(" ncmds: %#lx\n"), (long) mdata->header.ncmds); 706 fprintf (file, _(" sizeocmds: %#lx\n"), (long) mdata->header.sizeofcmds); 707 fprintf (file, _(" flags: %#lx\n"), (long) mdata->header.flags); 708 fprintf (file, _(" version: %x\n"), mdata->header.version); 709 710 return TRUE; 711 } 712 713 /* Copy any private info we understand from the input bfd 714 to the output bfd. */ 715 716 bfd_boolean 717 bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd) 718 { 719 bfd_mach_o_data_struct *imdata; 720 bfd_mach_o_data_struct *omdata; 721 bfd_mach_o_load_command *icmd; 722 723 if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour 724 || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour) 725 return TRUE; 726 727 BFD_ASSERT (bfd_mach_o_valid (ibfd)); 728 BFD_ASSERT (bfd_mach_o_valid (obfd)); 729 730 imdata = bfd_mach_o_get_data (ibfd); 731 omdata = bfd_mach_o_get_data (obfd); 732 733 /* Copy header flags. */ 734 omdata->header.flags = imdata->header.flags; 735 736 /* PR 23299. Copy the cputype. */ 737 if (imdata->header.cputype != omdata->header.cputype) 738 { 739 if (omdata->header.cputype == 0) 740 omdata->header.cputype = imdata->header.cputype; 741 else if (imdata->header.cputype != 0) 742 /* Urg - what has happened ? */ 743 _bfd_error_handler (_("incompatible cputypes in mach-o files: %ld vs %ld"), 744 (long) imdata->header.cputype, 745 (long) omdata->header.cputype); 746 } 747 748 /* Copy the cpusubtype. */ 749 omdata->header.cpusubtype = imdata->header.cpusubtype; 750 751 /* Copy commands. */ 752 for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next) 753 { 754 bfd_mach_o_load_command *ocmd; 755 756 switch (icmd->type) 757 { 758 case BFD_MACH_O_LC_LOAD_DYLIB: 759 case BFD_MACH_O_LC_LOAD_DYLINKER: 760 case BFD_MACH_O_LC_DYLD_INFO: 761 /* Command is copied. */ 762 ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command)); 763 if (ocmd == NULL) 764 return FALSE; 765 766 /* Copy common fields. */ 767 ocmd->type = icmd->type; 768 ocmd->type_required = icmd->type_required; 769 ocmd->offset = 0; 770 ocmd->len = icmd->len; 771 break; 772 773 default: 774 /* Command is not copied. */ 775 continue; 776 break; 777 } 778 779 switch (icmd->type) 780 { 781 case BFD_MACH_O_LC_LOAD_DYLIB: 782 { 783 bfd_mach_o_dylib_command *idy = &icmd->command.dylib; 784 bfd_mach_o_dylib_command *ody = &ocmd->command.dylib; 785 786 ody->name_offset = idy->name_offset; 787 ody->timestamp = idy->timestamp; 788 ody->current_version = idy->current_version; 789 ody->compatibility_version = idy->compatibility_version; 790 ody->name_str = idy->name_str; 791 } 792 break; 793 794 case BFD_MACH_O_LC_LOAD_DYLINKER: 795 { 796 bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker; 797 bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker; 798 799 ody->name_offset = idy->name_offset; 800 ody->name_str = idy->name_str; 801 } 802 break; 803 804 case BFD_MACH_O_LC_DYLD_INFO: 805 { 806 bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info; 807 bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info; 808 809 if (bfd_mach_o_read_dyld_content (ibfd, idy)) 810 { 811 ody->rebase_size = idy->rebase_size; 812 ody->rebase_content = idy->rebase_content; 813 814 ody->bind_size = idy->bind_size; 815 ody->bind_content = idy->bind_content; 816 817 ody->weak_bind_size = idy->weak_bind_size; 818 ody->weak_bind_content = idy->weak_bind_content; 819 820 ody->lazy_bind_size = idy->lazy_bind_size; 821 ody->lazy_bind_content = idy->lazy_bind_content; 822 823 ody->export_size = idy->export_size; 824 ody->export_content = idy->export_content; 825 } 826 /* PR 17512L: file: 730e492d. */ 827 else 828 { 829 ody->rebase_size = 830 ody->bind_size = 831 ody->weak_bind_size = 832 ody->lazy_bind_size = 833 ody->export_size = 0; 834 ody->rebase_content = 835 ody->bind_content = 836 ody->weak_bind_content = 837 ody->lazy_bind_content = 838 ody->export_content = NULL; 839 } 840 } 841 break; 842 843 default: 844 /* That command should be handled. */ 845 abort (); 846 } 847 848 /* Insert command. */ 849 bfd_mach_o_append_command (obfd, ocmd); 850 } 851 852 return TRUE; 853 } 854 855 /* This allows us to set up to 32 bits of flags (unless we invent some 856 fiendish scheme to subdivide). For now, we'll just set the file flags 857 without error checking - just overwrite. */ 858 859 bfd_boolean 860 bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags) 861 { 862 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 863 864 if (!mdata) 865 return FALSE; 866 867 mdata->header.flags = flags; 868 return TRUE; 869 } 870 871 /* Count the total number of symbols. */ 872 873 static long 874 bfd_mach_o_count_symbols (bfd *abfd) 875 { 876 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 877 878 if (mdata->symtab == NULL) 879 return 0; 880 return mdata->symtab->nsyms; 881 } 882 883 long 884 bfd_mach_o_get_symtab_upper_bound (bfd *abfd) 885 { 886 long nsyms = bfd_mach_o_count_symbols (abfd); 887 888 return ((nsyms + 1) * sizeof (asymbol *)); 889 } 890 891 long 892 bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation) 893 { 894 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 895 long nsyms = bfd_mach_o_count_symbols (abfd); 896 bfd_mach_o_symtab_command *sym = mdata->symtab; 897 unsigned long j; 898 899 if (nsyms < 0) 900 return nsyms; 901 902 if (nsyms == 0) 903 { 904 /* Do not try to read symbols if there are none. */ 905 alocation[0] = NULL; 906 return 0; 907 } 908 909 if (!bfd_mach_o_read_symtab_symbols (abfd)) 910 { 911 _bfd_error_handler 912 (_("bfd_mach_o_canonicalize_symtab: unable to load symbols")); 913 return 0; 914 } 915 916 BFD_ASSERT (sym->symbols != NULL); 917 918 for (j = 0; j < sym->nsyms; j++) 919 alocation[j] = &sym->symbols[j].symbol; 920 921 alocation[j] = NULL; 922 923 return nsyms; 924 } 925 926 /* Create synthetic symbols for indirect symbols. */ 927 928 long 929 bfd_mach_o_get_synthetic_symtab (bfd *abfd, 930 long symcount ATTRIBUTE_UNUSED, 931 asymbol **syms ATTRIBUTE_UNUSED, 932 long dynsymcount ATTRIBUTE_UNUSED, 933 asymbol **dynsyms ATTRIBUTE_UNUSED, 934 asymbol **ret) 935 { 936 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 937 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; 938 bfd_mach_o_symtab_command *symtab = mdata->symtab; 939 asymbol *s; 940 char * s_start; 941 char * s_end; 942 unsigned long count, i, j, n; 943 size_t size; 944 char *names; 945 char *nul_name; 946 const char stub [] = "$stub"; 947 948 *ret = NULL; 949 950 /* Stop now if no symbols or no indirect symbols. */ 951 if (dysymtab == NULL || dysymtab->nindirectsyms == 0 952 || symtab == NULL || symtab->symbols == NULL) 953 return 0; 954 955 /* We need to allocate a bfd symbol for every indirect symbol and to 956 allocate the memory for its name. */ 957 count = dysymtab->nindirectsyms; 958 size = count * sizeof (asymbol) + 1; 959 960 for (j = 0; j < count; j++) 961 { 962 const char * strng; 963 unsigned int isym = dysymtab->indirect_syms[j]; 964 965 /* Some indirect symbols are anonymous. */ 966 if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name)) 967 /* PR 17512: file: f5b8eeba. */ 968 size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub); 969 } 970 971 s_start = bfd_malloc (size); 972 s = *ret = (asymbol *) s_start; 973 if (s == NULL) 974 return -1; 975 names = (char *) (s + count); 976 nul_name = names; 977 *names++ = 0; 978 s_end = s_start + size; 979 980 n = 0; 981 for (i = 0; i < mdata->nsects; i++) 982 { 983 bfd_mach_o_section *sec = mdata->sections[i]; 984 unsigned int first, last; 985 bfd_vma addr; 986 bfd_vma entry_size; 987 988 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 989 { 990 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 991 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 992 case BFD_MACH_O_S_SYMBOL_STUBS: 993 /* Only these sections have indirect symbols. */ 994 first = sec->reserved1; 995 last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec); 996 addr = sec->addr; 997 entry_size = bfd_mach_o_section_get_entry_size (abfd, sec); 998 999 /* PR 17512: file: 08e15eec. */ 1000 if (first >= count || last >= count || first > last) 1001 goto fail; 1002 1003 for (j = first; j < last; j++) 1004 { 1005 unsigned int isym = dysymtab->indirect_syms[j]; 1006 1007 /* PR 17512: file: 04d64d9b. */ 1008 if (((char *) s) + sizeof (* s) > s_end) 1009 goto fail; 1010 1011 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 1012 s->section = sec->bfdsection; 1013 s->value = addr - sec->addr; 1014 s->udata.p = NULL; 1015 1016 if (isym < symtab->nsyms 1017 && symtab->symbols[isym].symbol.name) 1018 { 1019 const char *sym = symtab->symbols[isym].symbol.name; 1020 size_t len; 1021 1022 s->name = names; 1023 len = strlen (sym); 1024 /* PR 17512: file: 47dfd4d2. */ 1025 if (names + len >= s_end) 1026 goto fail; 1027 memcpy (names, sym, len); 1028 names += len; 1029 /* PR 17512: file: 18f340a4. */ 1030 if (names + sizeof (stub) >= s_end) 1031 goto fail; 1032 memcpy (names, stub, sizeof (stub)); 1033 names += sizeof (stub); 1034 } 1035 else 1036 s->name = nul_name; 1037 1038 addr += entry_size; 1039 s++; 1040 n++; 1041 } 1042 break; 1043 default: 1044 break; 1045 } 1046 } 1047 1048 return n; 1049 1050 fail: 1051 free (s_start); 1052 * ret = NULL; 1053 return -1; 1054 } 1055 1056 void 1057 bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, 1058 asymbol *symbol, 1059 symbol_info *ret) 1060 { 1061 bfd_symbol_info (symbol, ret); 1062 } 1063 1064 void 1065 bfd_mach_o_print_symbol (bfd *abfd, 1066 void * afile, 1067 asymbol *symbol, 1068 bfd_print_symbol_type how) 1069 { 1070 FILE *file = (FILE *) afile; 1071 const char *name; 1072 bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol; 1073 1074 switch (how) 1075 { 1076 case bfd_print_symbol_name: 1077 fprintf (file, "%s", symbol->name); 1078 break; 1079 default: 1080 bfd_print_symbol_vandf (abfd, (void *) file, symbol); 1081 if (asym->n_type & BFD_MACH_O_N_STAB) 1082 name = bfd_get_stab_name (asym->n_type); 1083 else 1084 switch (asym->n_type & BFD_MACH_O_N_TYPE) 1085 { 1086 case BFD_MACH_O_N_UNDF: 1087 if (symbol->value == 0) 1088 name = "UND"; 1089 else 1090 name = "COM"; 1091 break; 1092 case BFD_MACH_O_N_ABS: 1093 name = "ABS"; 1094 break; 1095 case BFD_MACH_O_N_INDR: 1096 name = "INDR"; 1097 break; 1098 case BFD_MACH_O_N_PBUD: 1099 name = "PBUD"; 1100 break; 1101 case BFD_MACH_O_N_SECT: 1102 name = "SECT"; 1103 break; 1104 default: 1105 name = "???"; 1106 break; 1107 } 1108 if (name == NULL) 1109 name = ""; 1110 fprintf (file, " %02x %-6s %02x %04x", 1111 asym->n_type, name, asym->n_sect, asym->n_desc); 1112 if ((asym->n_type & BFD_MACH_O_N_STAB) == 0 1113 && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) 1114 fprintf (file, " [%s]", symbol->section->name); 1115 fprintf (file, " %s", symbol->name); 1116 } 1117 } 1118 1119 static void 1120 bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype, 1121 bfd_mach_o_cpu_subtype msubtype, 1122 enum bfd_architecture *type, 1123 unsigned long *subtype) 1124 { 1125 *subtype = bfd_arch_unknown; 1126 1127 switch (mtype) 1128 { 1129 case BFD_MACH_O_CPU_TYPE_VAX: 1130 *type = bfd_arch_vax; 1131 break; 1132 case BFD_MACH_O_CPU_TYPE_MC680x0: 1133 *type = bfd_arch_m68k; 1134 break; 1135 case BFD_MACH_O_CPU_TYPE_I386: 1136 *type = bfd_arch_i386; 1137 *subtype = bfd_mach_i386_i386; 1138 break; 1139 case BFD_MACH_O_CPU_TYPE_X86_64: 1140 *type = bfd_arch_i386; 1141 *subtype = bfd_mach_x86_64; 1142 break; 1143 case BFD_MACH_O_CPU_TYPE_MIPS: 1144 *type = bfd_arch_mips; 1145 break; 1146 case BFD_MACH_O_CPU_TYPE_MC98000: 1147 *type = bfd_arch_m98k; 1148 break; 1149 case BFD_MACH_O_CPU_TYPE_HPPA: 1150 *type = bfd_arch_hppa; 1151 break; 1152 case BFD_MACH_O_CPU_TYPE_ARM: 1153 *type = bfd_arch_arm; 1154 switch (msubtype) 1155 { 1156 case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T: 1157 *subtype = bfd_mach_arm_4T; 1158 break; 1159 case BFD_MACH_O_CPU_SUBTYPE_ARM_V6: 1160 *subtype = bfd_mach_arm_4T; /* Best fit ? */ 1161 break; 1162 case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ: 1163 *subtype = bfd_mach_arm_5TE; 1164 break; 1165 case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE: 1166 *subtype = bfd_mach_arm_XScale; 1167 break; 1168 case BFD_MACH_O_CPU_SUBTYPE_ARM_V7: 1169 *subtype = bfd_mach_arm_5TE; /* Best fit ? */ 1170 break; 1171 case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL: 1172 default: 1173 break; 1174 } 1175 break; 1176 case BFD_MACH_O_CPU_TYPE_SPARC: 1177 *type = bfd_arch_sparc; 1178 *subtype = bfd_mach_sparc; 1179 break; 1180 case BFD_MACH_O_CPU_TYPE_ALPHA: 1181 *type = bfd_arch_alpha; 1182 break; 1183 case BFD_MACH_O_CPU_TYPE_POWERPC: 1184 *type = bfd_arch_powerpc; 1185 *subtype = bfd_mach_ppc; 1186 break; 1187 case BFD_MACH_O_CPU_TYPE_POWERPC_64: 1188 *type = bfd_arch_powerpc; 1189 *subtype = bfd_mach_ppc64; 1190 break; 1191 case BFD_MACH_O_CPU_TYPE_ARM64: 1192 *type = bfd_arch_aarch64; 1193 *subtype = bfd_mach_aarch64; 1194 break; 1195 default: 1196 *type = bfd_arch_unknown; 1197 break; 1198 } 1199 } 1200 1201 /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the 1202 number of bytes written or -1 in case of error. */ 1203 1204 static int 1205 bfd_mach_o_pad4 (bfd *abfd, unsigned int len) 1206 { 1207 if (len % 4 != 0) 1208 { 1209 char pad[4] = {0,0,0,0}; 1210 unsigned int padlen = 4 - (len % 4); 1211 1212 if (bfd_bwrite (pad, padlen, abfd) != padlen) 1213 return -1; 1214 1215 return padlen; 1216 } 1217 else 1218 return 0; 1219 } 1220 1221 /* Likewise, but for a command. */ 1222 1223 static int 1224 bfd_mach_o_pad_command (bfd *abfd, unsigned int len) 1225 { 1226 unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4; 1227 1228 if (len % align != 0) 1229 { 1230 char pad[8] = {0}; 1231 unsigned int padlen = align - (len % align); 1232 1233 if (bfd_bwrite (pad, padlen, abfd) != padlen) 1234 return -1; 1235 1236 return padlen; 1237 } 1238 else 1239 return 0; 1240 } 1241 1242 static bfd_boolean 1243 bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header) 1244 { 1245 struct mach_o_header_external raw; 1246 unsigned int size; 1247 1248 size = mach_o_wide_p (header) ? 1249 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 1250 1251 bfd_h_put_32 (abfd, header->magic, raw.magic); 1252 bfd_h_put_32 (abfd, header->cputype, raw.cputype); 1253 bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype); 1254 bfd_h_put_32 (abfd, header->filetype, raw.filetype); 1255 bfd_h_put_32 (abfd, header->ncmds, raw.ncmds); 1256 bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds); 1257 bfd_h_put_32 (abfd, header->flags, raw.flags); 1258 1259 if (mach_o_wide_p (header)) 1260 bfd_h_put_32 (abfd, header->reserved, raw.reserved); 1261 1262 if (bfd_seek (abfd, 0, SEEK_SET) != 0 1263 || bfd_bwrite (&raw, size, abfd) != size) 1264 return FALSE; 1265 1266 return TRUE; 1267 } 1268 1269 static bfd_boolean 1270 bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command) 1271 { 1272 bfd_mach_o_thread_command *cmd = &command->command.thread; 1273 unsigned int i; 1274 struct mach_o_thread_command_external raw; 1275 unsigned int offset; 1276 1277 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 1278 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 1279 1280 offset = BFD_MACH_O_LC_SIZE; 1281 for (i = 0; i < cmd->nflavours; i++) 1282 { 1283 BFD_ASSERT ((cmd->flavours[i].size % 4) == 0); 1284 BFD_ASSERT (cmd->flavours[i].offset == 1285 (command->offset + offset + BFD_MACH_O_LC_SIZE)); 1286 1287 bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour); 1288 bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count); 1289 1290 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 1291 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1292 return FALSE; 1293 1294 offset += cmd->flavours[i].size + sizeof (raw); 1295 } 1296 1297 return TRUE; 1298 } 1299 1300 static bfd_boolean 1301 bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command) 1302 { 1303 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 1304 struct mach_o_str_command_external raw; 1305 unsigned int namelen; 1306 1307 bfd_h_put_32 (abfd, cmd->name_offset, raw.str); 1308 1309 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1310 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1311 return FALSE; 1312 1313 namelen = strlen (cmd->name_str) + 1; 1314 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) 1315 return FALSE; 1316 1317 if (bfd_mach_o_pad_command (abfd, namelen) < 0) 1318 return FALSE; 1319 1320 return TRUE; 1321 } 1322 1323 static bfd_boolean 1324 bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command) 1325 { 1326 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 1327 struct mach_o_dylib_command_external raw; 1328 unsigned int namelen; 1329 1330 bfd_h_put_32 (abfd, cmd->name_offset, raw.name); 1331 bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp); 1332 bfd_h_put_32 (abfd, cmd->current_version, raw.current_version); 1333 bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version); 1334 1335 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1336 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1337 return FALSE; 1338 1339 namelen = strlen (cmd->name_str) + 1; 1340 if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) 1341 return FALSE; 1342 1343 if (bfd_mach_o_pad_command (abfd, namelen) < 0) 1344 return FALSE; 1345 1346 return TRUE; 1347 } 1348 1349 static bfd_boolean 1350 bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command) 1351 { 1352 bfd_mach_o_main_command *cmd = &command->command.main; 1353 struct mach_o_entry_point_command_external raw; 1354 1355 bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff); 1356 bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize); 1357 1358 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1359 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1360 return FALSE; 1361 1362 return TRUE; 1363 } 1364 1365 static bfd_boolean 1366 bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) 1367 { 1368 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; 1369 struct mach_o_dyld_info_command_external raw; 1370 1371 bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off); 1372 bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size); 1373 bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off); 1374 bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size); 1375 bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off); 1376 bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size); 1377 bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off); 1378 bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size); 1379 bfd_h_put_32 (abfd, cmd->export_off, raw.export_off); 1380 bfd_h_put_32 (abfd, cmd->export_size, raw.export_size); 1381 1382 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1383 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1384 return FALSE; 1385 1386 if (cmd->rebase_size != 0) 1387 if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0 1388 || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) != 1389 cmd->rebase_size)) 1390 return FALSE; 1391 1392 if (cmd->bind_size != 0) 1393 if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0 1394 || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) != 1395 cmd->bind_size)) 1396 return FALSE; 1397 1398 if (cmd->weak_bind_size != 0) 1399 if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0 1400 || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) != 1401 cmd->weak_bind_size)) 1402 return FALSE; 1403 1404 if (cmd->lazy_bind_size != 0) 1405 if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0 1406 || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) != 1407 cmd->lazy_bind_size)) 1408 return FALSE; 1409 1410 if (cmd->export_size != 0) 1411 if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0 1412 || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) != 1413 cmd->export_size)) 1414 return FALSE; 1415 1416 return TRUE; 1417 } 1418 1419 long 1420 bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, 1421 asection *asect) 1422 { 1423 return (asect->reloc_count + 1) * sizeof (arelent *); 1424 } 1425 1426 /* In addition to the need to byte-swap the symbol number, the bit positions 1427 of the fields in the relocation information vary per target endian-ness. */ 1428 1429 void 1430 bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel, 1431 unsigned char *fields) 1432 { 1433 unsigned char info = fields[3]; 1434 1435 if (bfd_big_endian (abfd)) 1436 { 1437 rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2]; 1438 rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; 1439 rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0; 1440 rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT) 1441 & BFD_MACH_O_LENGTH_MASK; 1442 rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0; 1443 } 1444 else 1445 { 1446 rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0]; 1447 rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; 1448 rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0; 1449 rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT) 1450 & BFD_MACH_O_LENGTH_MASK; 1451 rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0; 1452 } 1453 } 1454 1455 /* Set syms_ptr_ptr and addend of RES. */ 1456 1457 bfd_boolean 1458 bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd, 1459 bfd_mach_o_reloc_info *reloc, 1460 arelent *res, asymbol **syms) 1461 { 1462 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1463 unsigned int num; 1464 asymbol **sym; 1465 1466 /* Non-scattered relocation. */ 1467 reloc->r_scattered = 0; 1468 res->addend = 0; 1469 1470 num = reloc->r_value; 1471 1472 if (reloc->r_extern) 1473 { 1474 /* PR 17512: file: 8396-1185-0.004. */ 1475 if (num >= (unsigned) bfd_mach_o_count_symbols (abfd)) 1476 sym = bfd_und_section_ptr->symbol_ptr_ptr; 1477 else if (syms == NULL) 1478 sym = bfd_und_section_ptr->symbol_ptr_ptr; 1479 else 1480 /* An external symbol number. */ 1481 sym = syms + num; 1482 } 1483 else if (num == 0x00ffffff || num == 0) 1484 { 1485 /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this 1486 is generic code, we don't know wether this is really a PAIR. 1487 This value is almost certainly not a valid section number, hence 1488 this specific case to avoid an assertion failure. 1489 Target specific swap_reloc_in routine should adjust that. */ 1490 sym = bfd_abs_section_ptr->symbol_ptr_ptr; 1491 } 1492 else 1493 { 1494 /* PR 17512: file: 006-2964-0.004. */ 1495 if (num > mdata->nsects) 1496 return FALSE; 1497 1498 /* A section number. */ 1499 sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr; 1500 /* For a symbol defined in section S, the addend (stored in the 1501 binary) contains the address of the section. To comply with 1502 bfd convention, subtract the section address. 1503 Use the address from the header, so that the user can modify 1504 the vma of the section. */ 1505 res->addend = -mdata->sections[num - 1]->addr; 1506 } 1507 1508 /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset 1509 in the lower 16bits of the address value. So we have to find the 1510 'symbol' from the preceding reloc. We do this even though the 1511 section symbol is probably not needed here, because NULL symbol 1512 values cause an assert in generic BFD code. This must be done in 1513 the PPC swap_reloc_in routine. */ 1514 res->sym_ptr_ptr = sym; 1515 1516 return TRUE; 1517 } 1518 1519 /* Do most of the work for canonicalize_relocs on RAW: create internal 1520 representation RELOC and set most fields of RES using symbol table SYMS. 1521 Each target still has to set the howto of RES and possibly adjust other 1522 fields. 1523 Previously the Mach-O hook point was simply swap_in, but some targets 1524 (like arm64) don't follow the generic rules (symnum is a value for the 1525 non-scattered relocation ADDEND). */ 1526 1527 bfd_boolean 1528 bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd, 1529 struct mach_o_reloc_info_external *raw, 1530 bfd_mach_o_reloc_info *reloc, 1531 arelent *res, asymbol **syms) 1532 { 1533 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1534 bfd_vma addr; 1535 1536 addr = bfd_get_32 (abfd, raw->r_address); 1537 res->sym_ptr_ptr = NULL; 1538 res->addend = 0; 1539 1540 if (addr & BFD_MACH_O_SR_SCATTERED) 1541 { 1542 unsigned int j; 1543 bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum); 1544 1545 /* Scattered relocation, can't be extern. */ 1546 reloc->r_scattered = 1; 1547 reloc->r_extern = 0; 1548 1549 /* Extract section and offset from r_value (symnum). */ 1550 reloc->r_value = symnum; 1551 /* FIXME: This breaks when a symbol in a reloc exactly follows the 1552 end of the data for the section (e.g. in a calculation of section 1553 data length). At present, the symbol will end up associated with 1554 the following section or, if it falls within alignment padding, as 1555 null - which will assert later. */ 1556 for (j = 0; j < mdata->nsects; j++) 1557 { 1558 bfd_mach_o_section *sect = mdata->sections[j]; 1559 if (symnum >= sect->addr && symnum < sect->addr + sect->size) 1560 { 1561 res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr; 1562 res->addend = symnum - sect->addr; 1563 break; 1564 } 1565 } 1566 1567 /* Extract the info and address fields from r_address. */ 1568 reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr); 1569 reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr); 1570 reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL; 1571 reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr); 1572 res->address = BFD_MACH_O_GET_SR_ADDRESS (addr); 1573 } 1574 else 1575 { 1576 /* Non-scattered relocation. */ 1577 reloc->r_scattered = 0; 1578 reloc->r_address = addr; 1579 res->address = addr; 1580 1581 /* The value and info fields have to be extracted dependent on target 1582 endian-ness. */ 1583 bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum); 1584 1585 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc, 1586 res, syms)) 1587 return FALSE; 1588 } 1589 1590 /* We have set up a reloc with all the information present, so the swapper 1591 can modify address, value and addend fields, if necessary, to convey 1592 information in the generic BFD reloc that is mach-o specific. */ 1593 1594 return TRUE; 1595 } 1596 1597 static int 1598 bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos, 1599 unsigned long count, 1600 arelent *res, asymbol **syms) 1601 { 1602 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1603 unsigned long i; 1604 struct mach_o_reloc_info_external *native_relocs; 1605 bfd_size_type native_size; 1606 1607 /* Allocate and read relocs. */ 1608 native_size = count * BFD_MACH_O_RELENT_SIZE; 1609 1610 /* PR 17512: file: 09477b57. */ 1611 if (native_size < count) 1612 return -1; 1613 1614 native_relocs = 1615 (struct mach_o_reloc_info_external *) bfd_malloc (native_size); 1616 if (native_relocs == NULL) 1617 return -1; 1618 1619 if (bfd_seek (abfd, filepos, SEEK_SET) != 0 1620 || bfd_bread (native_relocs, native_size, abfd) != native_size) 1621 goto err; 1622 1623 for (i = 0; i < count; i++) 1624 { 1625 if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i], 1626 &res[i], syms, res)) 1627 goto err; 1628 } 1629 free (native_relocs); 1630 return i; 1631 err: 1632 free (native_relocs); 1633 return -1; 1634 } 1635 1636 long 1637 bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect, 1638 arelent **rels, asymbol **syms) 1639 { 1640 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1641 unsigned long i; 1642 arelent *res; 1643 1644 if (asect->reloc_count == 0) 1645 return 0; 1646 1647 /* No need to go further if we don't know how to read relocs. */ 1648 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) 1649 return 0; 1650 1651 if (asect->relocation == NULL) 1652 { 1653 if (asect->reloc_count * sizeof (arelent) < asect->reloc_count) 1654 return -1; 1655 res = bfd_malloc (asect->reloc_count * sizeof (arelent)); 1656 if (res == NULL) 1657 return -1; 1658 1659 if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos, 1660 asect->reloc_count, res, syms) < 0) 1661 { 1662 free (res); 1663 return -1; 1664 } 1665 asect->relocation = res; 1666 } 1667 1668 res = asect->relocation; 1669 for (i = 0; i < asect->reloc_count; i++) 1670 rels[i] = &res[i]; 1671 rels[i] = NULL; 1672 1673 return i; 1674 } 1675 1676 long 1677 bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd) 1678 { 1679 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1680 1681 if (mdata->dysymtab == NULL) 1682 return 1; 1683 return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1) 1684 * sizeof (arelent *); 1685 } 1686 1687 long 1688 bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels, 1689 struct bfd_symbol **syms) 1690 { 1691 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1692 bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; 1693 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1694 unsigned long i; 1695 arelent *res; 1696 1697 if (dysymtab == NULL) 1698 return 0; 1699 if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0) 1700 return 0; 1701 1702 /* No need to go further if we don't know how to read relocs. */ 1703 if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) 1704 return 0; 1705 1706 if (mdata->dyn_reloc_cache == NULL) 1707 { 1708 if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent) 1709 < (dysymtab->nextrel + dysymtab->nlocrel)) 1710 return -1; 1711 1712 res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel) 1713 * sizeof (arelent)); 1714 if (res == NULL) 1715 return -1; 1716 1717 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff, 1718 dysymtab->nextrel, res, syms) < 0) 1719 { 1720 free (res); 1721 return -1; 1722 } 1723 1724 if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff, 1725 dysymtab->nlocrel, 1726 res + dysymtab->nextrel, syms) < 0) 1727 { 1728 free (res); 1729 return -1; 1730 } 1731 1732 mdata->dyn_reloc_cache = res; 1733 } 1734 1735 res = mdata->dyn_reloc_cache; 1736 for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++) 1737 rels[i] = &res[i]; 1738 rels[i] = NULL; 1739 return i; 1740 } 1741 1742 /* In addition to the need to byte-swap the symbol number, the bit positions 1743 of the fields in the relocation information vary per target endian-ness. */ 1744 1745 static void 1746 bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields, 1747 bfd_mach_o_reloc_info *rel) 1748 { 1749 unsigned char info = 0; 1750 1751 BFD_ASSERT (rel->r_type <= 15); 1752 BFD_ASSERT (rel->r_length <= 3); 1753 1754 if (bfd_big_endian (abfd)) 1755 { 1756 fields[0] = (rel->r_value >> 16) & 0xff; 1757 fields[1] = (rel->r_value >> 8) & 0xff; 1758 fields[2] = rel->r_value & 0xff; 1759 info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT; 1760 info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0; 1761 info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT; 1762 info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0; 1763 } 1764 else 1765 { 1766 fields[2] = (rel->r_value >> 16) & 0xff; 1767 fields[1] = (rel->r_value >> 8) & 0xff; 1768 fields[0] = rel->r_value & 0xff; 1769 info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT; 1770 info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0; 1771 info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT; 1772 info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0; 1773 } 1774 fields[3] = info; 1775 } 1776 1777 static bfd_boolean 1778 bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section) 1779 { 1780 unsigned int i; 1781 arelent **entries; 1782 asection *sec; 1783 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 1784 1785 sec = section->bfdsection; 1786 if (sec->reloc_count == 0) 1787 return TRUE; 1788 1789 if (bed->_bfd_mach_o_swap_reloc_out == NULL) 1790 return TRUE; 1791 1792 if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0) 1793 return FALSE; 1794 1795 /* Convert and write. */ 1796 entries = section->bfdsection->orelocation; 1797 for (i = 0; i < section->nreloc; i++) 1798 { 1799 arelent *rel = entries[i]; 1800 struct mach_o_reloc_info_external raw; 1801 bfd_mach_o_reloc_info info, *pinfo = &info; 1802 1803 /* Convert relocation to an intermediate representation. */ 1804 if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo)) 1805 return FALSE; 1806 1807 /* Lower the relocation info. */ 1808 if (pinfo->r_scattered) 1809 { 1810 unsigned long v; 1811 1812 v = BFD_MACH_O_SR_SCATTERED 1813 | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0) 1814 | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length) 1815 | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type) 1816 | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address); 1817 /* Note: scattered relocs have field in reverse order... */ 1818 bfd_put_32 (abfd, v, raw.r_address); 1819 bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum); 1820 } 1821 else 1822 { 1823 bfd_put_32 (abfd, pinfo->r_address, raw.r_address); 1824 bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum, 1825 pinfo); 1826 } 1827 1828 if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd) 1829 != BFD_MACH_O_RELENT_SIZE) 1830 return FALSE; 1831 } 1832 return TRUE; 1833 } 1834 1835 static bfd_boolean 1836 bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section) 1837 { 1838 struct mach_o_section_32_external raw; 1839 1840 memcpy (raw.sectname, section->sectname, 16); 1841 memcpy (raw.segname, section->segname, 16); 1842 bfd_h_put_32 (abfd, section->addr, raw.addr); 1843 bfd_h_put_32 (abfd, section->size, raw.size); 1844 bfd_h_put_32 (abfd, section->offset, raw.offset); 1845 bfd_h_put_32 (abfd, section->align, raw.align); 1846 bfd_h_put_32 (abfd, section->reloff, raw.reloff); 1847 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); 1848 bfd_h_put_32 (abfd, section->flags, raw.flags); 1849 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); 1850 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); 1851 1852 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd) 1853 != BFD_MACH_O_SECTION_SIZE) 1854 return FALSE; 1855 1856 return TRUE; 1857 } 1858 1859 static bfd_boolean 1860 bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section) 1861 { 1862 struct mach_o_section_64_external raw; 1863 1864 memcpy (raw.sectname, section->sectname, 16); 1865 memcpy (raw.segname, section->segname, 16); 1866 bfd_h_put_64 (abfd, section->addr, raw.addr); 1867 bfd_h_put_64 (abfd, section->size, raw.size); 1868 bfd_h_put_32 (abfd, section->offset, raw.offset); 1869 bfd_h_put_32 (abfd, section->align, raw.align); 1870 bfd_h_put_32 (abfd, section->reloff, raw.reloff); 1871 bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); 1872 bfd_h_put_32 (abfd, section->flags, raw.flags); 1873 bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); 1874 bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); 1875 bfd_h_put_32 (abfd, section->reserved3, raw.reserved3); 1876 1877 if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) 1878 != BFD_MACH_O_SECTION_64_SIZE) 1879 return FALSE; 1880 1881 return TRUE; 1882 } 1883 1884 static bfd_boolean 1885 bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) 1886 { 1887 struct mach_o_segment_command_32_external raw; 1888 bfd_mach_o_segment_command *seg = &command->command.segment; 1889 bfd_mach_o_section *sec; 1890 1891 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 1892 1893 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1894 if (!bfd_mach_o_write_relocs (abfd, sec)) 1895 return FALSE; 1896 1897 memcpy (raw.segname, seg->segname, 16); 1898 bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr); 1899 bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize); 1900 bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff); 1901 bfd_h_put_32 (abfd, seg->filesize, raw.filesize); 1902 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); 1903 bfd_h_put_32 (abfd, seg->initprot, raw.initprot); 1904 bfd_h_put_32 (abfd, seg->nsects, raw.nsects); 1905 bfd_h_put_32 (abfd, seg->flags, raw.flags); 1906 1907 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1908 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1909 return FALSE; 1910 1911 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1912 if (!bfd_mach_o_write_section_32 (abfd, sec)) 1913 return FALSE; 1914 1915 return TRUE; 1916 } 1917 1918 static bfd_boolean 1919 bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) 1920 { 1921 struct mach_o_segment_command_64_external raw; 1922 bfd_mach_o_segment_command *seg = &command->command.segment; 1923 bfd_mach_o_section *sec; 1924 1925 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); 1926 1927 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1928 if (!bfd_mach_o_write_relocs (abfd, sec)) 1929 return FALSE; 1930 1931 memcpy (raw.segname, seg->segname, 16); 1932 bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr); 1933 bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize); 1934 bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff); 1935 bfd_h_put_64 (abfd, seg->filesize, raw.filesize); 1936 bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); 1937 bfd_h_put_32 (abfd, seg->initprot, raw.initprot); 1938 bfd_h_put_32 (abfd, seg->nsects, raw.nsects); 1939 bfd_h_put_32 (abfd, seg->flags, raw.flags); 1940 1941 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 1942 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 1943 return FALSE; 1944 1945 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 1946 if (!bfd_mach_o_write_section_64 (abfd, sec)) 1947 return FALSE; 1948 1949 return TRUE; 1950 } 1951 1952 static bfd_boolean 1953 bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym) 1954 { 1955 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 1956 unsigned long i; 1957 unsigned int wide = bfd_mach_o_wide_p (abfd); 1958 struct bfd_strtab_hash *strtab; 1959 asymbol **symbols = bfd_get_outsymbols (abfd); 1960 int padlen; 1961 1962 /* Write the symbols first. */ 1963 if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0) 1964 return FALSE; 1965 1966 strtab = _bfd_stringtab_init (); 1967 if (strtab == NULL) 1968 return FALSE; 1969 1970 if (sym->nsyms > 0) 1971 /* Although we don't strictly need to do this, for compatibility with 1972 Darwin system tools, actually output an empty string for the index 1973 0 entry. */ 1974 _bfd_stringtab_add (strtab, "", TRUE, FALSE); 1975 1976 for (i = 0; i < sym->nsyms; i++) 1977 { 1978 bfd_size_type str_index; 1979 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 1980 1981 if (s->symbol.name == 0 || s->symbol.name[0] == '\0') 1982 /* An index of 0 always means the empty string. */ 1983 str_index = 0; 1984 else 1985 { 1986 str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE); 1987 1988 if (str_index == (bfd_size_type) -1) 1989 goto err; 1990 } 1991 1992 if (wide) 1993 { 1994 struct mach_o_nlist_64_external raw; 1995 1996 bfd_h_put_32 (abfd, str_index, raw.n_strx); 1997 bfd_h_put_8 (abfd, s->n_type, raw.n_type); 1998 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); 1999 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); 2000 bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value, 2001 raw.n_value); 2002 2003 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2004 goto err; 2005 } 2006 else 2007 { 2008 struct mach_o_nlist_external raw; 2009 2010 bfd_h_put_32 (abfd, str_index, raw.n_strx); 2011 bfd_h_put_8 (abfd, s->n_type, raw.n_type); 2012 bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); 2013 bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); 2014 bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value, 2015 raw.n_value); 2016 2017 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2018 goto err; 2019 } 2020 } 2021 sym->strsize = _bfd_stringtab_size (strtab); 2022 sym->stroff = mdata->filelen; 2023 mdata->filelen += sym->strsize; 2024 2025 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0) 2026 goto err; 2027 2028 if (!_bfd_stringtab_emit (abfd, strtab)) 2029 goto err; 2030 2031 /* Pad string table. */ 2032 padlen = bfd_mach_o_pad4 (abfd, sym->strsize); 2033 if (padlen < 0) 2034 return FALSE; 2035 mdata->filelen += padlen; 2036 sym->strsize += padlen; 2037 2038 return TRUE; 2039 2040 err: 2041 _bfd_stringtab_free (strtab); 2042 sym->strsize = 0; 2043 return FALSE; 2044 } 2045 2046 static bfd_boolean 2047 bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command) 2048 { 2049 bfd_mach_o_symtab_command *sym = &command->command.symtab; 2050 struct mach_o_symtab_command_external raw; 2051 2052 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 2053 2054 /* The command. */ 2055 bfd_h_put_32 (abfd, sym->symoff, raw.symoff); 2056 bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms); 2057 bfd_h_put_32 (abfd, sym->stroff, raw.stroff); 2058 bfd_h_put_32 (abfd, sym->strsize, raw.strsize); 2059 2060 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 2061 || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2062 return FALSE; 2063 2064 return TRUE; 2065 } 2066 2067 /* Count the number of indirect symbols in the image. 2068 Requires that the sections are in their final order. */ 2069 2070 static unsigned int 2071 bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata) 2072 { 2073 unsigned int i; 2074 unsigned int nisyms = 0; 2075 2076 for (i = 0; i < mdata->nsects; ++i) 2077 { 2078 bfd_mach_o_section *sec = mdata->sections[i]; 2079 2080 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2081 { 2082 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 2083 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 2084 case BFD_MACH_O_S_SYMBOL_STUBS: 2085 nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec); 2086 break; 2087 default: 2088 break; 2089 } 2090 } 2091 return nisyms; 2092 } 2093 2094 /* Create the dysymtab. */ 2095 2096 static bfd_boolean 2097 bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd) 2098 { 2099 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2100 2101 /* TODO: 2102 We are not going to try and fill these in yet and, moreover, we are 2103 going to bail if they are already set. */ 2104 if (cmd->nmodtab != 0 2105 || cmd->ntoc != 0 2106 || cmd->nextrefsyms != 0) 2107 { 2108 _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet" 2109 " implemented for dysymtab commands.")); 2110 return FALSE; 2111 } 2112 2113 cmd->ilocalsym = 0; 2114 2115 if (bfd_get_symcount (abfd) > 0) 2116 { 2117 asymbol **symbols = bfd_get_outsymbols (abfd); 2118 unsigned long i; 2119 2120 /* Count the number of each kind of symbol. */ 2121 for (i = 0; i < bfd_get_symcount (abfd); ++i) 2122 { 2123 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2124 if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)) 2125 break; 2126 } 2127 cmd->nlocalsym = i; 2128 cmd->iextdefsym = i; 2129 for (; i < bfd_get_symcount (abfd); ++i) 2130 { 2131 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2132 if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF) 2133 break; 2134 } 2135 cmd->nextdefsym = i - cmd->nlocalsym; 2136 cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym; 2137 cmd->nundefsym = bfd_get_symcount (abfd) 2138 - cmd->nlocalsym 2139 - cmd->nextdefsym; 2140 } 2141 else 2142 { 2143 cmd->nlocalsym = 0; 2144 cmd->iextdefsym = 0; 2145 cmd->nextdefsym = 0; 2146 cmd->iundefsym = 0; 2147 cmd->nundefsym = 0; 2148 } 2149 2150 cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata); 2151 if (cmd->nindirectsyms > 0) 2152 { 2153 unsigned i; 2154 unsigned n; 2155 2156 mdata->filelen = FILE_ALIGN (mdata->filelen, 2); 2157 cmd->indirectsymoff = mdata->filelen; 2158 mdata->filelen += cmd->nindirectsyms * 4; 2159 2160 if (cmd->nindirectsyms * 4 < cmd->nindirectsyms) 2161 return FALSE; 2162 cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4); 2163 if (cmd->indirect_syms == NULL) 2164 return FALSE; 2165 2166 n = 0; 2167 for (i = 0; i < mdata->nsects; ++i) 2168 { 2169 bfd_mach_o_section *sec = mdata->sections[i]; 2170 2171 switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2172 { 2173 case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: 2174 case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: 2175 case BFD_MACH_O_S_SYMBOL_STUBS: 2176 { 2177 unsigned j, num; 2178 bfd_mach_o_asymbol **isyms = sec->indirect_syms; 2179 2180 num = bfd_mach_o_section_get_nbr_indirect (abfd, sec); 2181 if (isyms == NULL || num == 0) 2182 break; 2183 /* Record the starting index in the reserved1 field. */ 2184 sec->reserved1 = n; 2185 for (j = 0; j < num; j++, n++) 2186 { 2187 if (isyms[j] == NULL) 2188 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL; 2189 else if (isyms[j]->symbol.section == bfd_abs_section_ptr 2190 && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT)) 2191 cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL 2192 | BFD_MACH_O_INDIRECT_SYM_ABS; 2193 else 2194 cmd->indirect_syms[n] = isyms[j]->symbol.udata.i; 2195 } 2196 } 2197 break; 2198 default: 2199 break; 2200 } 2201 } 2202 } 2203 2204 return TRUE; 2205 } 2206 2207 /* Write a dysymtab command. 2208 TODO: Possibly coalesce writes of smaller objects. */ 2209 2210 static bfd_boolean 2211 bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 2212 { 2213 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; 2214 2215 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 2216 2217 if (cmd->nmodtab != 0) 2218 { 2219 unsigned int i; 2220 2221 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) 2222 return FALSE; 2223 2224 for (i = 0; i < cmd->nmodtab; i++) 2225 { 2226 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; 2227 unsigned int iinit; 2228 unsigned int ninit; 2229 2230 iinit = module->iinit & 0xffff; 2231 iinit |= ((module->iterm & 0xffff) << 16); 2232 2233 ninit = module->ninit & 0xffff; 2234 ninit |= ((module->nterm & 0xffff) << 16); 2235 2236 if (bfd_mach_o_wide_p (abfd)) 2237 { 2238 struct mach_o_dylib_module_64_external w; 2239 2240 bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name); 2241 bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym); 2242 bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym); 2243 bfd_h_put_32 (abfd, module->irefsym, &w.irefsym); 2244 bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym); 2245 bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym); 2246 bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym); 2247 bfd_h_put_32 (abfd, module->iextrel, &w.iextrel); 2248 bfd_h_put_32 (abfd, module->nextrel, &w.nextrel); 2249 bfd_h_put_32 (abfd, iinit, &w.iinit_iterm); 2250 bfd_h_put_32 (abfd, ninit, &w.ninit_nterm); 2251 bfd_h_put_64 (abfd, module->objc_module_info_addr, 2252 &w.objc_module_info_addr); 2253 bfd_h_put_32 (abfd, module->objc_module_info_size, 2254 &w.objc_module_info_size); 2255 2256 if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w)) 2257 return FALSE; 2258 } 2259 else 2260 { 2261 struct mach_o_dylib_module_external n; 2262 2263 bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name); 2264 bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym); 2265 bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym); 2266 bfd_h_put_32 (abfd, module->irefsym, &n.irefsym); 2267 bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym); 2268 bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym); 2269 bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym); 2270 bfd_h_put_32 (abfd, module->iextrel, &n.iextrel); 2271 bfd_h_put_32 (abfd, module->nextrel, &n.nextrel); 2272 bfd_h_put_32 (abfd, iinit, &n.iinit_iterm); 2273 bfd_h_put_32 (abfd, ninit, &n.ninit_nterm); 2274 bfd_h_put_32 (abfd, module->objc_module_info_addr, 2275 &n.objc_module_info_addr); 2276 bfd_h_put_32 (abfd, module->objc_module_info_size, 2277 &n.objc_module_info_size); 2278 2279 if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n)) 2280 return FALSE; 2281 } 2282 } 2283 } 2284 2285 if (cmd->ntoc != 0) 2286 { 2287 unsigned int i; 2288 2289 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) 2290 return FALSE; 2291 2292 for (i = 0; i < cmd->ntoc; i++) 2293 { 2294 struct mach_o_dylib_table_of_contents_external raw; 2295 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; 2296 2297 bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index); 2298 bfd_h_put_32 (abfd, toc->module_index, &raw.module_index); 2299 2300 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2301 return FALSE; 2302 } 2303 } 2304 2305 if (cmd->nindirectsyms > 0) 2306 { 2307 unsigned int i; 2308 2309 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) 2310 return FALSE; 2311 2312 for (i = 0; i < cmd->nindirectsyms; ++i) 2313 { 2314 unsigned char raw[4]; 2315 2316 bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw); 2317 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) 2318 return FALSE; 2319 } 2320 } 2321 2322 if (cmd->nextrefsyms != 0) 2323 { 2324 unsigned int i; 2325 2326 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) 2327 return FALSE; 2328 2329 for (i = 0; i < cmd->nextrefsyms; i++) 2330 { 2331 unsigned long v; 2332 unsigned char raw[4]; 2333 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; 2334 2335 /* Fields isym and flags are written as bit-fields, thus we need 2336 a specific processing for endianness. */ 2337 2338 if (bfd_big_endian (abfd)) 2339 { 2340 v = ((ref->isym & 0xffffff) << 8); 2341 v |= ref->flags & 0xff; 2342 } 2343 else 2344 { 2345 v = ref->isym & 0xffffff; 2346 v |= ((ref->flags & 0xff) << 24); 2347 } 2348 2349 bfd_h_put_32 (abfd, v, raw); 2350 if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) 2351 return FALSE; 2352 } 2353 } 2354 2355 /* The command. */ 2356 if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0) 2357 return FALSE; 2358 else 2359 { 2360 struct mach_o_dysymtab_command_external raw; 2361 2362 bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym); 2363 bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym); 2364 bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym); 2365 bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym); 2366 bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym); 2367 bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym); 2368 bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff); 2369 bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc); 2370 bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff); 2371 bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab); 2372 bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff); 2373 bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms); 2374 bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff); 2375 bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms); 2376 bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff); 2377 bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel); 2378 bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff); 2379 bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel); 2380 2381 if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) 2382 return FALSE; 2383 } 2384 2385 return TRUE; 2386 } 2387 2388 static unsigned 2389 bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s) 2390 { 2391 unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE; 2392 2393 /* Just leave debug symbols where they are (pretend they are local, and 2394 then they will just be sorted on position). */ 2395 if (s->n_type & BFD_MACH_O_N_STAB) 2396 return 0; 2397 2398 /* Local (we should never see an undefined local AFAICT). */ 2399 if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))) 2400 return 0; 2401 2402 /* Common symbols look like undefined externs. */ 2403 if (mtyp == BFD_MACH_O_N_UNDF) 2404 return 2; 2405 2406 /* A defined non-local, non-debug symbol. */ 2407 return 1; 2408 } 2409 2410 static int 2411 bfd_mach_o_cf_symbols (const void *a, const void *b) 2412 { 2413 bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a; 2414 bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b; 2415 unsigned int soa, sob; 2416 2417 soa = bfd_mach_o_primary_symbol_sort_key (sa); 2418 sob = bfd_mach_o_primary_symbol_sort_key (sb); 2419 if (soa < sob) 2420 return -1; 2421 2422 if (soa > sob) 2423 return 1; 2424 2425 /* If it's local or stab, just preserve the input order. */ 2426 if (soa == 0) 2427 { 2428 if (sa->symbol.udata.i < sb->symbol.udata.i) 2429 return -1; 2430 if (sa->symbol.udata.i > sb->symbol.udata.i) 2431 return 1; 2432 2433 /* This is probably an error. */ 2434 return 0; 2435 } 2436 2437 /* The second sort key is name. */ 2438 return strcmp (sa->symbol.name, sb->symbol.name); 2439 } 2440 2441 /* Process the symbols. 2442 2443 This should be OK for single-module files - but it is not likely to work 2444 for multi-module shared libraries. 2445 2446 (a) If the application has not filled in the relevant mach-o fields, make 2447 an estimate. 2448 2449 (b) Order them, like this: 2450 ( i) local. 2451 (unsorted) 2452 ( ii) external defined 2453 (by name) 2454 (iii) external undefined/common 2455 (by name) 2456 ( iv) common 2457 (by name) 2458 */ 2459 2460 static bfd_boolean 2461 bfd_mach_o_mangle_symbols (bfd *abfd) 2462 { 2463 unsigned long i; 2464 asymbol **symbols = bfd_get_outsymbols (abfd); 2465 2466 if (symbols == NULL || bfd_get_symcount (abfd) == 0) 2467 return TRUE; 2468 2469 for (i = 0; i < bfd_get_symcount (abfd); i++) 2470 { 2471 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2472 2473 /* We use this value, which is out-of-range as a symbol index, to signal 2474 that the mach-o-specific data are not filled in and need to be created 2475 from the bfd values. It is much preferable for the application to do 2476 this, since more meaningful diagnostics can be made that way. */ 2477 2478 if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET) 2479 { 2480 /* No symbol information has been set - therefore determine 2481 it from the bfd symbol flags/info. */ 2482 if (s->symbol.section == bfd_abs_section_ptr) 2483 s->n_type = BFD_MACH_O_N_ABS; 2484 else if (s->symbol.section == bfd_und_section_ptr) 2485 { 2486 s->n_type = BFD_MACH_O_N_UNDF; 2487 if (s->symbol.flags & BSF_WEAK) 2488 s->n_desc |= BFD_MACH_O_N_WEAK_REF; 2489 /* mach-o automatically makes undefined symbols extern. */ 2490 s->n_type |= BFD_MACH_O_N_EXT; 2491 s->symbol.flags |= BSF_GLOBAL; 2492 } 2493 else if (s->symbol.section == bfd_com_section_ptr) 2494 { 2495 s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT; 2496 s->symbol.flags |= BSF_GLOBAL; 2497 } 2498 else 2499 s->n_type = BFD_MACH_O_N_SECT; 2500 2501 if (s->symbol.flags & BSF_GLOBAL) 2502 s->n_type |= BFD_MACH_O_N_EXT; 2503 } 2504 2505 /* Put the section index in, where required. */ 2506 if ((s->symbol.section != bfd_abs_section_ptr 2507 && s->symbol.section != bfd_und_section_ptr 2508 && s->symbol.section != bfd_com_section_ptr) 2509 || ((s->n_type & BFD_MACH_O_N_STAB) != 0 2510 && s->symbol.name == NULL)) 2511 s->n_sect = s->symbol.section->output_section->target_index; 2512 2513 /* Number to preserve order for local and debug syms. */ 2514 s->symbol.udata.i = i; 2515 } 2516 2517 /* Sort the symbols. */ 2518 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd), 2519 sizeof (asymbol *), bfd_mach_o_cf_symbols); 2520 2521 for (i = 0; i < bfd_get_symcount (abfd); ++i) 2522 { 2523 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2524 s->symbol.udata.i = i; /* renumber. */ 2525 } 2526 2527 return TRUE; 2528 } 2529 2530 /* We build a flat table of sections, which can be re-ordered if necessary. 2531 Fill in the section number and other mach-o-specific data. */ 2532 2533 static bfd_boolean 2534 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata) 2535 { 2536 asection *sec; 2537 unsigned target_index; 2538 unsigned nsect; 2539 2540 nsect = bfd_count_sections (abfd); 2541 2542 /* Don't do it if it's already set - assume the application knows what it's 2543 doing. */ 2544 if (mdata->nsects == nsect 2545 && (mdata->nsects == 0 || mdata->sections != NULL)) 2546 return TRUE; 2547 2548 /* We need to check that this can be done... */ 2549 if (nsect > 255) 2550 { 2551 _bfd_error_handler (_("mach-o: there are too many sections (%u)" 2552 " maximum is 255,\n"), nsect); 2553 return FALSE; 2554 } 2555 2556 mdata->nsects = nsect; 2557 mdata->sections = bfd_alloc2 (abfd, 2558 mdata->nsects, sizeof (bfd_mach_o_section *)); 2559 if (mdata->sections == NULL) 2560 return FALSE; 2561 2562 /* Create Mach-O sections. 2563 Section type, attribute and align should have been set when the 2564 section was created - either read in or specified. */ 2565 target_index = 0; 2566 for (sec = abfd->sections; sec; sec = sec->next) 2567 { 2568 unsigned bfd_align = bfd_get_section_alignment (abfd, sec); 2569 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec); 2570 2571 mdata->sections[target_index] = msect; 2572 2573 msect->addr = bfd_get_section_vma (abfd, sec); 2574 msect->size = bfd_get_section_size (sec); 2575 2576 /* Use the largest alignment set, in case it was bumped after the 2577 section was created. */ 2578 msect->align = msect->align > bfd_align ? msect->align : bfd_align; 2579 2580 msect->offset = 0; 2581 sec->target_index = ++target_index; 2582 } 2583 2584 return TRUE; 2585 } 2586 2587 bfd_boolean 2588 bfd_mach_o_write_contents (bfd *abfd) 2589 { 2590 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2591 bfd_mach_o_load_command *cmd; 2592 bfd_mach_o_symtab_command *symtab = NULL; 2593 bfd_mach_o_dysymtab_command *dysymtab = NULL; 2594 bfd_mach_o_segment_command *linkedit = NULL; 2595 2596 /* Make the commands, if not already present. */ 2597 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 2598 return FALSE; 2599 abfd->output_has_begun = TRUE; 2600 2601 /* Write the header. */ 2602 if (!bfd_mach_o_write_header (abfd, &mdata->header)) 2603 return FALSE; 2604 2605 /* First pass: allocate the linkedit segment. */ 2606 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2607 switch (cmd->type) 2608 { 2609 case BFD_MACH_O_LC_SEGMENT_64: 2610 case BFD_MACH_O_LC_SEGMENT: 2611 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0) 2612 linkedit = &cmd->command.segment; 2613 break; 2614 case BFD_MACH_O_LC_SYMTAB: 2615 symtab = &cmd->command.symtab; 2616 break; 2617 case BFD_MACH_O_LC_DYSYMTAB: 2618 dysymtab = &cmd->command.dysymtab; 2619 break; 2620 case BFD_MACH_O_LC_DYLD_INFO: 2621 { 2622 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info; 2623 2624 if (di->rebase_size != 0) 2625 { 2626 di->rebase_off = mdata->filelen; 2627 mdata->filelen += di->rebase_size; 2628 } 2629 if (di->bind_size != 0) 2630 { 2631 di->bind_off = mdata->filelen; 2632 mdata->filelen += di->bind_size; 2633 } 2634 if (di->weak_bind_size != 0) 2635 { 2636 di->weak_bind_off = mdata->filelen; 2637 mdata->filelen += di->weak_bind_size; 2638 } 2639 if (di->lazy_bind_size != 0) 2640 { 2641 di->lazy_bind_off = mdata->filelen; 2642 mdata->filelen += di->lazy_bind_size; 2643 } 2644 if (di->export_size != 0) 2645 { 2646 di->export_off = mdata->filelen; 2647 mdata->filelen += di->export_size; 2648 } 2649 } 2650 break; 2651 case BFD_MACH_O_LC_LOAD_DYLIB: 2652 case BFD_MACH_O_LC_LOAD_DYLINKER: 2653 case BFD_MACH_O_LC_MAIN: 2654 /* Nothing to do. */ 2655 break; 2656 default: 2657 _bfd_error_handler 2658 (_("unable to allocate data for load command %#x"), 2659 cmd->type); 2660 break; 2661 } 2662 2663 /* Specially handle symtab and dysymtab. */ 2664 2665 /* Pre-allocate the symbol table (but not the string table). The reason 2666 is that the dysymtab is after the symbol table but before the string 2667 table (required by the native strip tool). */ 2668 if (symtab != NULL) 2669 { 2670 unsigned int symlen; 2671 unsigned int wide = bfd_mach_o_wide_p (abfd); 2672 2673 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 2674 2675 /* Align for symbols. */ 2676 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2); 2677 symtab->symoff = mdata->filelen; 2678 2679 symtab->nsyms = bfd_get_symcount (abfd); 2680 mdata->filelen += symtab->nsyms * symlen; 2681 } 2682 2683 /* Build the dysymtab. */ 2684 if (dysymtab != NULL) 2685 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab)) 2686 return FALSE; 2687 2688 /* Write symtab and strtab. */ 2689 if (symtab != NULL) 2690 if (!bfd_mach_o_write_symtab_content (abfd, symtab)) 2691 return FALSE; 2692 2693 /* Adjust linkedit size. */ 2694 if (linkedit != NULL) 2695 { 2696 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */ 2697 2698 linkedit->vmsize = mdata->filelen - linkedit->fileoff; 2699 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */ 2700 linkedit->filesize = mdata->filelen - linkedit->fileoff; 2701 2702 linkedit->initprot = BFD_MACH_O_PROT_READ; 2703 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2704 | BFD_MACH_O_PROT_EXECUTE; 2705 } 2706 2707 /* Second pass: write commands. */ 2708 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2709 { 2710 struct mach_o_load_command_external raw; 2711 unsigned long typeflag; 2712 2713 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0); 2714 2715 bfd_h_put_32 (abfd, typeflag, raw.cmd); 2716 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize); 2717 2718 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0 2719 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8) 2720 return FALSE; 2721 2722 switch (cmd->type) 2723 { 2724 case BFD_MACH_O_LC_SEGMENT: 2725 if (!bfd_mach_o_write_segment_32 (abfd, cmd)) 2726 return FALSE; 2727 break; 2728 case BFD_MACH_O_LC_SEGMENT_64: 2729 if (!bfd_mach_o_write_segment_64 (abfd, cmd)) 2730 return FALSE; 2731 break; 2732 case BFD_MACH_O_LC_SYMTAB: 2733 if (!bfd_mach_o_write_symtab (abfd, cmd)) 2734 return FALSE; 2735 break; 2736 case BFD_MACH_O_LC_DYSYMTAB: 2737 if (!bfd_mach_o_write_dysymtab (abfd, cmd)) 2738 return FALSE; 2739 break; 2740 case BFD_MACH_O_LC_THREAD: 2741 case BFD_MACH_O_LC_UNIXTHREAD: 2742 if (!bfd_mach_o_write_thread (abfd, cmd)) 2743 return FALSE; 2744 break; 2745 case BFD_MACH_O_LC_LOAD_DYLIB: 2746 if (!bfd_mach_o_write_dylib (abfd, cmd)) 2747 return FALSE; 2748 break; 2749 case BFD_MACH_O_LC_LOAD_DYLINKER: 2750 if (!bfd_mach_o_write_dylinker (abfd, cmd)) 2751 return FALSE; 2752 break; 2753 case BFD_MACH_O_LC_MAIN: 2754 if (!bfd_mach_o_write_main (abfd, cmd)) 2755 return FALSE; 2756 break; 2757 case BFD_MACH_O_LC_DYLD_INFO: 2758 if (!bfd_mach_o_write_dyld_info (abfd, cmd)) 2759 return FALSE; 2760 break; 2761 default: 2762 _bfd_error_handler 2763 (_("unable to write unknown load command %#x"), 2764 cmd->type); 2765 return FALSE; 2766 } 2767 } 2768 2769 return TRUE; 2770 } 2771 2772 static void 2773 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg, 2774 bfd_mach_o_section *s) 2775 { 2776 if (seg->sect_head == NULL) 2777 seg->sect_head = s; 2778 else 2779 seg->sect_tail->next = s; 2780 seg->sect_tail = s; 2781 } 2782 2783 /* Create section Mach-O flags from BFD flags. */ 2784 2785 static void 2786 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, 2787 asection *sec) 2788 { 2789 flagword bfd_flags; 2790 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec); 2791 2792 /* Create default flags. */ 2793 bfd_flags = bfd_get_section_flags (abfd, sec); 2794 if ((bfd_flags & SEC_CODE) == SEC_CODE) 2795 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS 2796 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 2797 | BFD_MACH_O_S_REGULAR; 2798 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC) 2799 s->flags = BFD_MACH_O_S_ZEROFILL; 2800 else if (bfd_flags & SEC_DEBUGGING) 2801 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG; 2802 else 2803 s->flags = BFD_MACH_O_S_REGULAR; 2804 } 2805 2806 static bfd_boolean 2807 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2808 { 2809 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2810 unsigned int i, j; 2811 2812 seg->vmaddr = 0; 2813 seg->fileoff = mdata->filelen; 2814 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2815 | BFD_MACH_O_PROT_EXECUTE; 2816 seg->maxprot = seg->initprot; 2817 2818 /* Append sections to the segment. 2819 2820 This is a little tedious, we have to honor the need to account zerofill 2821 sections after all the rest. This forces us to do the calculation of 2822 total vmsize in three passes so that any alignment increments are 2823 properly accounted. */ 2824 for (i = 0; i < mdata->nsects; ++i) 2825 { 2826 bfd_mach_o_section *s = mdata->sections[i]; 2827 asection *sec = s->bfdsection; 2828 2829 /* Although we account for zerofill section sizes in vm order, they are 2830 placed in the file in source sequence. */ 2831 bfd_mach_o_append_section_to_segment (seg, s); 2832 s->offset = 0; 2833 2834 /* Zerofill sections have zero file size & offset, the only content 2835 written to the file is the symbols. */ 2836 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL 2837 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2838 == BFD_MACH_O_S_GB_ZEROFILL)) 2839 continue; 2840 2841 /* The Darwin system tools (in MH_OBJECT files, at least) always account 2842 sections, even those with zero size. */ 2843 if (s->size > 0) 2844 { 2845 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2846 seg->vmsize += s->size; 2847 2848 /* MH_OBJECT files have unaligned content. */ 2849 if (1) 2850 { 2851 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2852 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2853 } 2854 seg->filesize += s->size; 2855 2856 /* The system tools write even zero-sized sections with an offset 2857 field set to the current file position. */ 2858 s->offset = mdata->filelen; 2859 } 2860 2861 sec->filepos = s->offset; 2862 mdata->filelen += s->size; 2863 } 2864 2865 /* Now pass through again, for zerofill, only now we just update the 2866 vmsize, and then for zerofill_GB. */ 2867 for (j = 0; j < 2; j++) 2868 { 2869 unsigned int stype; 2870 2871 if (j == 0) 2872 stype = BFD_MACH_O_S_ZEROFILL; 2873 else 2874 stype = BFD_MACH_O_S_GB_ZEROFILL; 2875 2876 for (i = 0; i < mdata->nsects; ++i) 2877 { 2878 bfd_mach_o_section *s = mdata->sections[i]; 2879 2880 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype) 2881 continue; 2882 2883 if (s->size > 0) 2884 { 2885 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2886 seg->vmsize += s->size; 2887 } 2888 } 2889 } 2890 2891 /* Allocate space for the relocations. */ 2892 mdata->filelen = FILE_ALIGN (mdata->filelen, 2); 2893 2894 for (i = 0; i < mdata->nsects; ++i) 2895 { 2896 bfd_mach_o_section *ms = mdata->sections[i]; 2897 asection *sec = ms->bfdsection; 2898 2899 ms->nreloc = sec->reloc_count; 2900 if (ms->nreloc == 0) 2901 { 2902 /* Clear nreloc and reloff if there is no relocs. */ 2903 ms->reloff = 0; 2904 continue; 2905 } 2906 sec->rel_filepos = mdata->filelen; 2907 ms->reloff = sec->rel_filepos; 2908 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE; 2909 } 2910 2911 return TRUE; 2912 } 2913 2914 static bfd_boolean 2915 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2916 { 2917 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2918 unsigned int i; 2919 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; 2920 bfd_vma vma; 2921 bfd_mach_o_section *s; 2922 2923 seg->vmsize = 0; 2924 2925 seg->fileoff = mdata->filelen; 2926 seg->maxprot = 0; 2927 seg->initprot = 0; 2928 seg->flags = 0; 2929 2930 /* Append sections to the segment. We assume they are properly ordered 2931 by vma (but we check that). */ 2932 vma = 0; 2933 for (i = 0; i < mdata->nsects; ++i) 2934 { 2935 s = mdata->sections[i]; 2936 2937 /* Consider only sections for this segment. */ 2938 if (strcmp (seg->segname, s->segname) != 0) 2939 continue; 2940 2941 bfd_mach_o_append_section_to_segment (seg, s); 2942 2943 if (s->addr < vma) 2944 { 2945 _bfd_error_handler 2946 /* xgettext:c-format */ 2947 (_("section address (%#" PRIx64 ") " 2948 "below start of segment (%#" PRIx64 ")"), 2949 (uint64_t) s->addr, (uint64_t) vma); 2950 return FALSE; 2951 } 2952 2953 vma = s->addr + s->size; 2954 } 2955 2956 /* Set segment file offset: make it page aligned. */ 2957 vma = seg->sect_head->addr; 2958 seg->vmaddr = vma & ~pagemask; 2959 if ((mdata->filelen & pagemask) > (vma & pagemask)) 2960 mdata->filelen += pagemask + 1; 2961 seg->fileoff = mdata->filelen & ~pagemask; 2962 mdata->filelen = seg->fileoff + (vma & pagemask); 2963 2964 /* Set section file offset. */ 2965 for (s = seg->sect_head; s != NULL; s = s->next) 2966 { 2967 asection *sec = s->bfdsection; 2968 flagword flags = bfd_get_section_flags (abfd, sec); 2969 2970 /* Adjust segment size. */ 2971 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2972 seg->vmsize += s->size; 2973 2974 /* File offset and length. */ 2975 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2976 2977 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL 2978 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2979 != BFD_MACH_O_S_GB_ZEROFILL)) 2980 { 2981 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2982 2983 s->offset = mdata->filelen; 2984 s->bfdsection->filepos = s->offset; 2985 2986 seg->filesize += s->size; 2987 mdata->filelen += s->size; 2988 } 2989 else 2990 { 2991 s->offset = 0; 2992 s->bfdsection->filepos = 0; 2993 } 2994 2995 /* Set protection. */ 2996 if (flags & SEC_LOAD) 2997 { 2998 if (flags & SEC_CODE) 2999 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE; 3000 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA) 3001 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ; 3002 } 3003 3004 /* Relocs shouldn't appear in non-object files. */ 3005 if (s->bfdsection->reloc_count != 0) 3006 return FALSE; 3007 } 3008 3009 /* Set maxprot. */ 3010 if (seg->initprot != 0) 3011 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 3012 | BFD_MACH_O_PROT_EXECUTE; 3013 else 3014 seg->maxprot = 0; 3015 3016 /* Round segment size (and file size). */ 3017 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask; 3018 seg->filesize = (seg->filesize + pagemask) & ~pagemask; 3019 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask; 3020 3021 return TRUE; 3022 } 3023 3024 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds 3025 fields in header. */ 3026 3027 static bfd_boolean 3028 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata) 3029 { 3030 unsigned wide = mach_o_wide_p (&mdata->header); 3031 unsigned int hdrlen; 3032 ufile_ptr offset; 3033 bfd_mach_o_load_command *cmd; 3034 unsigned int align; 3035 bfd_boolean ret = TRUE; 3036 3037 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3038 align = wide ? 8 - 1 : 4 - 1; 3039 offset = hdrlen; 3040 mdata->header.ncmds = 0; 3041 3042 for (cmd = mdata->first_command; cmd; cmd = cmd->next) 3043 { 3044 mdata->header.ncmds++; 3045 cmd->offset = offset; 3046 3047 switch (cmd->type) 3048 { 3049 case BFD_MACH_O_LC_SEGMENT_64: 3050 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE 3051 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects; 3052 break; 3053 case BFD_MACH_O_LC_SEGMENT: 3054 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE 3055 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects; 3056 break; 3057 case BFD_MACH_O_LC_SYMTAB: 3058 cmd->len = sizeof (struct mach_o_symtab_command_external) 3059 + BFD_MACH_O_LC_SIZE; 3060 break; 3061 case BFD_MACH_O_LC_DYSYMTAB: 3062 cmd->len = sizeof (struct mach_o_dysymtab_command_external) 3063 + BFD_MACH_O_LC_SIZE; 3064 break; 3065 case BFD_MACH_O_LC_LOAD_DYLIB: 3066 cmd->len = sizeof (struct mach_o_dylib_command_external) 3067 + BFD_MACH_O_LC_SIZE; 3068 cmd->command.dylib.name_offset = cmd->len; 3069 cmd->len += strlen (cmd->command.dylib.name_str); 3070 cmd->len = (cmd->len + align) & ~align; 3071 break; 3072 case BFD_MACH_O_LC_LOAD_DYLINKER: 3073 cmd->len = sizeof (struct mach_o_str_command_external) 3074 + BFD_MACH_O_LC_SIZE; 3075 cmd->command.dylinker.name_offset = cmd->len; 3076 cmd->len += strlen (cmd->command.dylinker.name_str); 3077 cmd->len = (cmd->len + align) & ~align; 3078 break; 3079 case BFD_MACH_O_LC_MAIN: 3080 cmd->len = sizeof (struct mach_o_entry_point_command_external) 3081 + BFD_MACH_O_LC_SIZE; 3082 break; 3083 case BFD_MACH_O_LC_DYLD_INFO: 3084 cmd->len = sizeof (struct mach_o_dyld_info_command_external) 3085 + BFD_MACH_O_LC_SIZE; 3086 break; 3087 default: 3088 _bfd_error_handler 3089 (_("unable to layout unknown load command %#x"), 3090 cmd->type); 3091 ret = FALSE; 3092 break; 3093 } 3094 3095 BFD_ASSERT (cmd->len % (align + 1) == 0); 3096 offset += cmd->len; 3097 } 3098 mdata->header.sizeofcmds = offset - hdrlen; 3099 mdata->filelen = offset; 3100 3101 return ret; 3102 } 3103 3104 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a 3105 segment. */ 3106 3107 static void 3108 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata, 3109 bfd_mach_o_load_command *cmd, 3110 const char *segname, unsigned int nbr_sect) 3111 { 3112 bfd_mach_o_segment_command *seg = &cmd->command.segment; 3113 unsigned wide = mach_o_wide_p (&mdata->header); 3114 3115 /* Init segment command. */ 3116 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT; 3117 cmd->type_required = FALSE; 3118 3119 strcpy (seg->segname, segname); 3120 seg->nsects = nbr_sect; 3121 3122 seg->vmaddr = 0; 3123 seg->vmsize = 0; 3124 3125 seg->fileoff = 0; 3126 seg->filesize = 0; 3127 seg->maxprot = 0; 3128 seg->initprot = 0; 3129 seg->flags = 0; 3130 seg->sect_head = NULL; 3131 seg->sect_tail = NULL; 3132 } 3133 3134 /* Build Mach-O load commands (currently assuming an MH_OBJECT file). 3135 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip 3136 and copy functionality. */ 3137 3138 bfd_boolean 3139 bfd_mach_o_build_commands (bfd *abfd) 3140 { 3141 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3142 unsigned wide = mach_o_wide_p (&mdata->header); 3143 unsigned int nbr_segcmd = 0; 3144 bfd_mach_o_load_command *commands; 3145 unsigned int nbr_commands; 3146 int symtab_idx = -1; 3147 int dysymtab_idx = -1; 3148 int main_idx = -1; 3149 unsigned int i; 3150 3151 /* Return now if already built. */ 3152 if (mdata->header.ncmds != 0) 3153 return TRUE; 3154 3155 /* Fill in the file type, if not already set. */ 3156 if (mdata->header.filetype == 0) 3157 { 3158 if (abfd->flags & EXEC_P) 3159 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE; 3160 else if (abfd->flags & DYNAMIC) 3161 mdata->header.filetype = BFD_MACH_O_MH_DYLIB; 3162 else 3163 mdata->header.filetype = BFD_MACH_O_MH_OBJECT; 3164 } 3165 3166 /* If hasn't already been done, flatten sections list, and sort 3167 if/when required. Must be done before the symbol table is adjusted, 3168 since that depends on properly numbered sections. */ 3169 if (mdata->nsects == 0 || mdata->sections == NULL) 3170 if (! bfd_mach_o_mangle_sections (abfd, mdata)) 3171 return FALSE; 3172 3173 /* Order the symbol table, fill-in/check mach-o specific fields and 3174 partition out any indirect symbols. */ 3175 if (!bfd_mach_o_mangle_symbols (abfd)) 3176 return FALSE; 3177 3178 /* Segment commands. */ 3179 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3180 { 3181 /* Only one segment for all the sections. But the segment is 3182 optional if there is no sections. */ 3183 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0; 3184 } 3185 else 3186 { 3187 bfd_mach_o_section *prev_sect = NULL; 3188 3189 /* One pagezero segment and one linkedit segment. */ 3190 nbr_segcmd = 2; 3191 3192 /* Create one segment for associated segment name in sections. 3193 Assume that sections with the same segment name are consecutive. */ 3194 for (i = 0; i < mdata->nsects; i++) 3195 { 3196 bfd_mach_o_section *this_sect = mdata->sections[i]; 3197 3198 if (prev_sect == NULL 3199 || strcmp (prev_sect->segname, this_sect->segname) != 0) 3200 { 3201 nbr_segcmd++; 3202 prev_sect = this_sect; 3203 } 3204 } 3205 } 3206 3207 nbr_commands = nbr_segcmd; 3208 3209 /* One command for the symbol table (only if there are symbols. */ 3210 if (bfd_get_symcount (abfd) > 0) 3211 symtab_idx = nbr_commands++; 3212 3213 /* FIXME: 3214 This is a rather crude test for whether we should build a dysymtab. */ 3215 if (bfd_mach_o_should_emit_dysymtab () 3216 && bfd_get_symcount (abfd)) 3217 { 3218 /* If there should be a case where a dysymtab could be emitted without 3219 a symtab (seems improbable), this would need amending. */ 3220 dysymtab_idx = nbr_commands++; 3221 } 3222 3223 /* Add an entry point command. */ 3224 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE 3225 && bfd_get_start_address (abfd) != 0) 3226 main_idx = nbr_commands++; 3227 3228 /* Well, we must have a header, at least. */ 3229 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3230 3231 /* A bit unusual, but no content is valid; 3232 as -n empty.s -o empty.o */ 3233 if (nbr_commands == 0) 3234 { 3235 /* Layout commands (well none...) and set headers command fields. */ 3236 return bfd_mach_o_layout_commands (mdata); 3237 } 3238 3239 /* Create commands for segments (and symtabs), prepend them. */ 3240 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command)); 3241 if (commands == NULL) 3242 return FALSE; 3243 for (i = 0; i < nbr_commands - 1; i++) 3244 commands[i].next = &commands[i + 1]; 3245 commands[nbr_commands - 1].next = mdata->first_command; 3246 if (mdata->first_command == NULL) 3247 mdata->last_command = &commands[nbr_commands - 1]; 3248 mdata->first_command = &commands[0]; 3249 3250 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0) 3251 { 3252 /* For object file, there is only one segment. */ 3253 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects); 3254 } 3255 else if (nbr_segcmd != 0) 3256 { 3257 bfd_mach_o_load_command *cmd; 3258 3259 BFD_ASSERT (nbr_segcmd >= 2); 3260 3261 /* The pagezero. */ 3262 cmd = &commands[0]; 3263 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0); 3264 3265 /* Segments from sections. */ 3266 cmd++; 3267 for (i = 0; i < mdata->nsects;) 3268 { 3269 const char *segname = mdata->sections[i]->segname; 3270 unsigned int nbr_sect = 1; 3271 3272 /* Count number of sections for this segment. */ 3273 for (i++; i < mdata->nsects; i++) 3274 if (strcmp (mdata->sections[i]->segname, segname) == 0) 3275 nbr_sect++; 3276 else 3277 break; 3278 3279 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect); 3280 cmd++; 3281 } 3282 3283 /* The linkedit. */ 3284 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0); 3285 } 3286 3287 if (symtab_idx >= 0) 3288 { 3289 /* Init symtab command. */ 3290 bfd_mach_o_load_command *cmd = &commands[symtab_idx]; 3291 3292 cmd->type = BFD_MACH_O_LC_SYMTAB; 3293 cmd->type_required = FALSE; 3294 } 3295 3296 /* If required, setup symtab command, see comment above about the quality 3297 of this test. */ 3298 if (dysymtab_idx >= 0) 3299 { 3300 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx]; 3301 3302 cmd->type = BFD_MACH_O_LC_DYSYMTAB; 3303 cmd->type_required = FALSE; 3304 } 3305 3306 /* Create the main command. */ 3307 if (main_idx >= 0) 3308 { 3309 bfd_mach_o_load_command *cmd = &commands[main_idx]; 3310 3311 cmd->type = BFD_MACH_O_LC_MAIN; 3312 cmd->type_required = TRUE; 3313 3314 cmd->command.main.entryoff = 0; 3315 cmd->command.main.stacksize = 0; 3316 } 3317 3318 /* Layout commands. */ 3319 if (! bfd_mach_o_layout_commands (mdata)) 3320 return FALSE; 3321 3322 /* So, now we have sized the commands and the filelen set to that. 3323 Now we can build the segment command and set the section file offsets. */ 3324 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3325 { 3326 for (i = 0; i < nbr_segcmd; i++) 3327 if (!bfd_mach_o_build_obj_seg_command 3328 (abfd, &commands[i].command.segment)) 3329 return FALSE; 3330 } 3331 else 3332 { 3333 bfd_vma maxvma = 0; 3334 3335 /* Skip pagezero and linkedit segments. */ 3336 for (i = 1; i < nbr_segcmd - 1; i++) 3337 { 3338 bfd_mach_o_segment_command *seg = &commands[i].command.segment; 3339 3340 if (!bfd_mach_o_build_exec_seg_command (abfd, seg)) 3341 return FALSE; 3342 3343 if (seg->vmaddr + seg->vmsize > maxvma) 3344 maxvma = seg->vmaddr + seg->vmsize; 3345 } 3346 3347 /* Set the size of __PAGEZERO. */ 3348 commands[0].command.segment.vmsize = 3349 commands[1].command.segment.vmaddr; 3350 3351 /* Set the vma and fileoff of __LINKEDIT. */ 3352 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma; 3353 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen; 3354 3355 /* Set entry point (once segments have been laid out). */ 3356 if (main_idx >= 0) 3357 commands[main_idx].command.main.entryoff = 3358 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr; 3359 } 3360 3361 return TRUE; 3362 } 3363 3364 /* Set the contents of a section. */ 3365 3366 bfd_boolean 3367 bfd_mach_o_set_section_contents (bfd *abfd, 3368 asection *section, 3369 const void * location, 3370 file_ptr offset, 3371 bfd_size_type count) 3372 { 3373 file_ptr pos; 3374 3375 /* Trying to write the first section contents will trigger the creation of 3376 the load commands if they are not already present. */ 3377 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 3378 return FALSE; 3379 3380 if (count == 0) 3381 return TRUE; 3382 3383 pos = section->filepos + offset; 3384 if (bfd_seek (abfd, pos, SEEK_SET) != 0 3385 || bfd_bwrite (location, count, abfd) != count) 3386 return FALSE; 3387 3388 return TRUE; 3389 } 3390 3391 int 3392 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, 3393 struct bfd_link_info *info ATTRIBUTE_UNUSED) 3394 { 3395 return 0; 3396 } 3397 3398 /* Make an empty symbol. This is required only because 3399 bfd_make_section_anyway wants to create a symbol for the section. */ 3400 3401 asymbol * 3402 bfd_mach_o_make_empty_symbol (bfd *abfd) 3403 { 3404 asymbol *new_symbol; 3405 3406 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol)); 3407 if (new_symbol == NULL) 3408 return new_symbol; 3409 new_symbol->the_bfd = abfd; 3410 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET; 3411 return new_symbol; 3412 } 3413 3414 static bfd_boolean 3415 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header) 3416 { 3417 struct mach_o_header_external raw; 3418 unsigned int size; 3419 bfd_vma (*get32) (const void *) = NULL; 3420 3421 /* Just read the magic number. */ 3422 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3423 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4) 3424 return FALSE; 3425 3426 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3427 { 3428 header->byteorder = BFD_ENDIAN_BIG; 3429 header->magic = BFD_MACH_O_MH_MAGIC; 3430 header->version = 1; 3431 get32 = bfd_getb32; 3432 } 3433 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3434 { 3435 header->byteorder = BFD_ENDIAN_LITTLE; 3436 header->magic = BFD_MACH_O_MH_MAGIC; 3437 header->version = 1; 3438 get32 = bfd_getl32; 3439 } 3440 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3441 { 3442 header->byteorder = BFD_ENDIAN_BIG; 3443 header->magic = BFD_MACH_O_MH_MAGIC_64; 3444 header->version = 2; 3445 get32 = bfd_getb32; 3446 } 3447 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3448 { 3449 header->byteorder = BFD_ENDIAN_LITTLE; 3450 header->magic = BFD_MACH_O_MH_MAGIC_64; 3451 header->version = 2; 3452 get32 = bfd_getl32; 3453 } 3454 else 3455 { 3456 header->byteorder = BFD_ENDIAN_UNKNOWN; 3457 return FALSE; 3458 } 3459 3460 /* Once the size of the header is known, read the full header. */ 3461 size = mach_o_wide_p (header) ? 3462 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3463 3464 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3465 || bfd_bread (&raw, size, abfd) != size) 3466 return FALSE; 3467 3468 header->cputype = (*get32) (raw.cputype); 3469 header->cpusubtype = (*get32) (raw.cpusubtype); 3470 header->filetype = (*get32) (raw.filetype); 3471 header->ncmds = (*get32) (raw.ncmds); 3472 header->sizeofcmds = (*get32) (raw.sizeofcmds); 3473 header->flags = (*get32) (raw.flags); 3474 3475 if (mach_o_wide_p (header)) 3476 header->reserved = (*get32) (raw.reserved); 3477 else 3478 header->reserved = 0; 3479 3480 return TRUE; 3481 } 3482 3483 bfd_boolean 3484 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec) 3485 { 3486 bfd_mach_o_section *s; 3487 unsigned bfdalign = bfd_get_section_alignment (abfd, sec); 3488 3489 s = bfd_mach_o_get_mach_o_section (sec); 3490 if (s == NULL) 3491 { 3492 flagword bfd_flags; 3493 static const mach_o_section_name_xlat * xlat; 3494 3495 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s)); 3496 if (s == NULL) 3497 return FALSE; 3498 sec->used_by_bfd = s; 3499 s->bfdsection = sec; 3500 3501 /* Create the Darwin seg/sect name pair from the bfd name. 3502 If this is a canonical name for which a specific paiting exists 3503 there will also be defined flags, type, attribute and alignment 3504 values. */ 3505 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s); 3506 if (xlat != NULL) 3507 { 3508 s->flags = xlat->macho_sectype | xlat->macho_secattr; 3509 s->align = xlat->sectalign > bfdalign ? xlat->sectalign 3510 : bfdalign; 3511 (void) bfd_set_section_alignment (abfd, sec, s->align); 3512 bfd_flags = bfd_get_section_flags (abfd, sec); 3513 if (bfd_flags == SEC_NO_FLAGS) 3514 bfd_set_section_flags (abfd, sec, xlat->bfd_flags); 3515 } 3516 else 3517 /* Create default flags. */ 3518 bfd_mach_o_set_section_flags_from_bfd (abfd, sec); 3519 } 3520 3521 return _bfd_generic_new_section_hook (abfd, sec); 3522 } 3523 3524 static void 3525 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec, 3526 unsigned long prot) 3527 { 3528 flagword flags; 3529 bfd_mach_o_section *section; 3530 3531 flags = bfd_get_section_flags (abfd, sec); 3532 section = bfd_mach_o_get_mach_o_section (sec); 3533 3534 /* TODO: see if we should use the xlat system for doing this by 3535 preference and fall back to this for unknown sections. */ 3536 3537 if (flags == SEC_NO_FLAGS) 3538 { 3539 /* Try to guess flags. */ 3540 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG) 3541 flags = SEC_DEBUGGING; 3542 else 3543 { 3544 flags = SEC_ALLOC; 3545 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK) 3546 != BFD_MACH_O_S_ZEROFILL) 3547 { 3548 flags |= SEC_LOAD; 3549 if (prot & BFD_MACH_O_PROT_EXECUTE) 3550 flags |= SEC_CODE; 3551 if (prot & BFD_MACH_O_PROT_WRITE) 3552 flags |= SEC_DATA; 3553 else if (prot & BFD_MACH_O_PROT_READ) 3554 flags |= SEC_READONLY; 3555 } 3556 } 3557 } 3558 else 3559 { 3560 if ((flags & SEC_DEBUGGING) == 0) 3561 flags |= SEC_ALLOC; 3562 } 3563 3564 if (section->offset != 0) 3565 flags |= SEC_HAS_CONTENTS; 3566 if (section->nreloc != 0) 3567 flags |= SEC_RELOC; 3568 3569 bfd_set_section_flags (abfd, sec, flags); 3570 3571 sec->vma = section->addr; 3572 sec->lma = section->addr; 3573 sec->size = section->size; 3574 sec->filepos = section->offset; 3575 sec->alignment_power = section->align; 3576 sec->segment_mark = 0; 3577 sec->reloc_count = section->nreloc; 3578 sec->rel_filepos = section->reloff; 3579 } 3580 3581 static asection * 3582 bfd_mach_o_make_bfd_section (bfd *abfd, 3583 const unsigned char *segname, 3584 const unsigned char *sectname) 3585 { 3586 const char *sname; 3587 flagword flags; 3588 3589 bfd_mach_o_convert_section_name_to_bfd 3590 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags); 3591 if (sname == NULL) 3592 return NULL; 3593 3594 return bfd_make_section_anyway_with_flags (abfd, sname, flags); 3595 } 3596 3597 static asection * 3598 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot) 3599 { 3600 struct mach_o_section_32_external raw; 3601 asection *sec; 3602 bfd_mach_o_section *section; 3603 3604 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd) 3605 != BFD_MACH_O_SECTION_SIZE) 3606 return NULL; 3607 3608 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3609 if (sec == NULL) 3610 return NULL; 3611 3612 section = bfd_mach_o_get_mach_o_section (sec); 3613 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3614 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3615 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3616 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3617 section->addr = bfd_h_get_32 (abfd, raw.addr); 3618 section->size = bfd_h_get_32 (abfd, raw.size); 3619 section->offset = bfd_h_get_32 (abfd, raw.offset); 3620 section->align = bfd_h_get_32 (abfd, raw.align); 3621 /* PR 17512: file: 0017eb76. */ 3622 if (section->align > 64) 3623 { 3624 _bfd_error_handler 3625 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, " 3626 "using 32 instead"), section->align); 3627 section->align = 32; 3628 } 3629 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3630 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3631 section->flags = bfd_h_get_32 (abfd, raw.flags); 3632 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3633 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3634 section->reserved3 = 0; 3635 3636 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3637 3638 return sec; 3639 } 3640 3641 static asection * 3642 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot) 3643 { 3644 struct mach_o_section_64_external raw; 3645 asection *sec; 3646 bfd_mach_o_section *section; 3647 3648 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) 3649 != BFD_MACH_O_SECTION_64_SIZE) 3650 return NULL; 3651 3652 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3653 if (sec == NULL) 3654 return NULL; 3655 3656 section = bfd_mach_o_get_mach_o_section (sec); 3657 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3658 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3659 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3660 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3661 section->addr = bfd_h_get_64 (abfd, raw.addr); 3662 section->size = bfd_h_get_64 (abfd, raw.size); 3663 section->offset = bfd_h_get_32 (abfd, raw.offset); 3664 section->align = bfd_h_get_32 (abfd, raw.align); 3665 if (section->align > 64) 3666 { 3667 _bfd_error_handler 3668 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, " 3669 "using 32 instead"), section->align); 3670 section->align = 32; 3671 } 3672 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3673 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3674 section->flags = bfd_h_get_32 (abfd, raw.flags); 3675 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3676 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3677 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3); 3678 3679 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3680 3681 return sec; 3682 } 3683 3684 static asection * 3685 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide) 3686 { 3687 if (wide) 3688 return bfd_mach_o_read_section_64 (abfd, prot); 3689 else 3690 return bfd_mach_o_read_section_32 (abfd, prot); 3691 } 3692 3693 static bfd_boolean 3694 bfd_mach_o_read_symtab_symbol (bfd *abfd, 3695 bfd_mach_o_symtab_command *sym, 3696 bfd_mach_o_asymbol *s, 3697 unsigned long i) 3698 { 3699 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3700 unsigned int wide = mach_o_wide_p (&mdata->header); 3701 unsigned int symwidth = 3702 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 3703 unsigned int symoff = sym->symoff + (i * symwidth); 3704 struct mach_o_nlist_64_external raw; 3705 unsigned char type = -1; 3706 unsigned char section = -1; 3707 short desc = -1; 3708 symvalue value = -1; 3709 unsigned long stroff = -1; 3710 unsigned int symtype = -1; 3711 3712 BFD_ASSERT (sym->strtab != NULL); 3713 3714 if (bfd_seek (abfd, symoff, SEEK_SET) != 0 3715 || bfd_bread (&raw, symwidth, abfd) != symwidth) 3716 { 3717 _bfd_error_handler 3718 /* xgettext:c-format */ 3719 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"), 3720 symwidth, symoff); 3721 return FALSE; 3722 } 3723 3724 stroff = bfd_h_get_32 (abfd, raw.n_strx); 3725 type = bfd_h_get_8 (abfd, raw.n_type); 3726 symtype = type & BFD_MACH_O_N_TYPE; 3727 section = bfd_h_get_8 (abfd, raw.n_sect); 3728 desc = bfd_h_get_16 (abfd, raw.n_desc); 3729 if (wide) 3730 value = bfd_h_get_64 (abfd, raw.n_value); 3731 else 3732 value = bfd_h_get_32 (abfd, raw.n_value); 3733 3734 if (stroff >= sym->strsize) 3735 { 3736 _bfd_error_handler 3737 /* xgettext:c-format */ 3738 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"), 3739 stroff, 3740 sym->strsize); 3741 return FALSE; 3742 } 3743 3744 s->symbol.the_bfd = abfd; 3745 s->symbol.name = sym->strtab + stroff; 3746 s->symbol.value = value; 3747 s->symbol.flags = 0x0; 3748 s->symbol.udata.i = i; 3749 s->n_type = type; 3750 s->n_sect = section; 3751 s->n_desc = desc; 3752 3753 if (type & BFD_MACH_O_N_STAB) 3754 { 3755 s->symbol.flags |= BSF_DEBUGGING; 3756 s->symbol.section = bfd_und_section_ptr; 3757 switch (type) 3758 { 3759 case N_FUN: 3760 case N_STSYM: 3761 case N_LCSYM: 3762 case N_BNSYM: 3763 case N_SLINE: 3764 case N_ENSYM: 3765 case N_ECOMM: 3766 case N_ECOML: 3767 case N_GSYM: 3768 if ((section > 0) && (section <= mdata->nsects)) 3769 { 3770 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3771 s->symbol.value = 3772 s->symbol.value - mdata->sections[section - 1]->addr; 3773 } 3774 break; 3775 } 3776 } 3777 else 3778 { 3779 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)) 3780 s->symbol.flags |= BSF_GLOBAL; 3781 else 3782 s->symbol.flags |= BSF_LOCAL; 3783 3784 switch (symtype) 3785 { 3786 case BFD_MACH_O_N_UNDF: 3787 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT) 3788 && s->symbol.value != 0) 3789 { 3790 /* A common symbol. */ 3791 s->symbol.section = bfd_com_section_ptr; 3792 s->symbol.flags = BSF_NO_FLAGS; 3793 } 3794 else 3795 { 3796 s->symbol.section = bfd_und_section_ptr; 3797 if (s->n_desc & BFD_MACH_O_N_WEAK_REF) 3798 s->symbol.flags |= BSF_WEAK; 3799 } 3800 break; 3801 case BFD_MACH_O_N_PBUD: 3802 s->symbol.section = bfd_und_section_ptr; 3803 break; 3804 case BFD_MACH_O_N_ABS: 3805 s->symbol.section = bfd_abs_section_ptr; 3806 break; 3807 case BFD_MACH_O_N_SECT: 3808 if ((section > 0) && (section <= mdata->nsects)) 3809 { 3810 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3811 s->symbol.value = 3812 s->symbol.value - mdata->sections[section - 1]->addr; 3813 } 3814 else 3815 { 3816 /* Mach-O uses 0 to mean "no section"; not an error. */ 3817 if (section != 0) 3818 { 3819 _bfd_error_handler 3820 /* xgettext:c-format */ 3821 (_("bfd_mach_o_read_symtab_symbol: " 3822 "symbol \"%s\" specified invalid section %d (max %lu): " 3823 "setting to undefined"), 3824 s->symbol.name, section, mdata->nsects); 3825 } 3826 s->symbol.section = bfd_und_section_ptr; 3827 } 3828 break; 3829 case BFD_MACH_O_N_INDR: 3830 /* FIXME: we don't follow the BFD convention as this indirect symbol 3831 won't be followed by the referenced one. This looks harmless 3832 unless we start using the linker. */ 3833 s->symbol.flags |= BSF_INDIRECT; 3834 s->symbol.section = bfd_ind_section_ptr; 3835 s->symbol.value = 0; 3836 break; 3837 default: 3838 _bfd_error_handler 3839 /* xgettext:c-format */ 3840 (_("bfd_mach_o_read_symtab_symbol: " 3841 "symbol \"%s\" specified invalid type field 0x%x: " 3842 "setting to undefined"), s->symbol.name, symtype); 3843 s->symbol.section = bfd_und_section_ptr; 3844 break; 3845 } 3846 } 3847 3848 return TRUE; 3849 } 3850 3851 bfd_boolean 3852 bfd_mach_o_read_symtab_strtab (bfd *abfd) 3853 { 3854 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3855 bfd_mach_o_symtab_command *sym = mdata->symtab; 3856 3857 /* Fail if there is no symtab. */ 3858 if (sym == NULL) 3859 return FALSE; 3860 3861 /* Success if already loaded. */ 3862 if (sym->strtab) 3863 return TRUE; 3864 3865 if (abfd->flags & BFD_IN_MEMORY) 3866 { 3867 struct bfd_in_memory *b; 3868 3869 b = (struct bfd_in_memory *) abfd->iostream; 3870 3871 if ((sym->stroff + sym->strsize) > b->size) 3872 { 3873 bfd_set_error (bfd_error_file_truncated); 3874 return FALSE; 3875 } 3876 sym->strtab = (char *) b->buffer + sym->stroff; 3877 } 3878 else 3879 { 3880 /* See PR 21840 for a reproducer. */ 3881 if ((sym->strsize + 1) == 0) 3882 return FALSE; 3883 sym->strtab = bfd_alloc (abfd, sym->strsize + 1); 3884 if (sym->strtab == NULL) 3885 return FALSE; 3886 3887 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0 3888 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize) 3889 { 3890 /* PR 17512: file: 10888-1609-0.004. */ 3891 bfd_release (abfd, sym->strtab); 3892 sym->strtab = NULL; 3893 bfd_set_error (bfd_error_file_truncated); 3894 return FALSE; 3895 } 3896 /* Zero terminate the string table. */ 3897 sym->strtab[sym->strsize] = 0; 3898 } 3899 3900 return TRUE; 3901 } 3902 3903 bfd_boolean 3904 bfd_mach_o_read_symtab_symbols (bfd *abfd) 3905 { 3906 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3907 bfd_mach_o_symtab_command *sym = mdata->symtab; 3908 unsigned long i; 3909 3910 if (sym == NULL || sym->symbols) 3911 /* Return now if there are no symbols or if already loaded. */ 3912 return TRUE; 3913 3914 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol)); 3915 if (sym->symbols == NULL) 3916 { 3917 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: " 3918 "unable to allocate memory for symbols")); 3919 sym->nsyms = 0; 3920 return FALSE; 3921 } 3922 3923 if (!bfd_mach_o_read_symtab_strtab (abfd)) 3924 goto fail; 3925 3926 for (i = 0; i < sym->nsyms; i++) 3927 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i)) 3928 goto fail; 3929 3930 return TRUE; 3931 3932 fail: 3933 bfd_release (abfd, sym->symbols); 3934 sym->symbols = NULL; 3935 sym->nsyms = 0; 3936 return FALSE; 3937 } 3938 3939 static const char * 3940 bfd_mach_o_i386_flavour_string (unsigned int flavour) 3941 { 3942 switch ((int) flavour) 3943 { 3944 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32"; 3945 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32"; 3946 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32"; 3947 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64"; 3948 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64"; 3949 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64"; 3950 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE"; 3951 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE"; 3952 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE"; 3953 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32"; 3954 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64"; 3955 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE"; 3956 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE"; 3957 default: return "UNKNOWN"; 3958 } 3959 } 3960 3961 static const char * 3962 bfd_mach_o_ppc_flavour_string (unsigned int flavour) 3963 { 3964 switch ((int) flavour) 3965 { 3966 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE"; 3967 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE"; 3968 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE"; 3969 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE"; 3970 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64"; 3971 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64"; 3972 default: return "UNKNOWN"; 3973 } 3974 } 3975 3976 static bfd_boolean 3977 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command) 3978 { 3979 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 3980 struct mach_o_str_command_external raw; 3981 unsigned int nameoff; 3982 unsigned int namelen; 3983 3984 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3985 return FALSE; 3986 3987 nameoff = bfd_h_get_32 (abfd, raw.str); 3988 3989 cmd->name_offset = nameoff; 3990 namelen = command->len - nameoff; 3991 nameoff += command->offset; 3992 cmd->name_str = bfd_alloc (abfd, namelen); 3993 if (cmd->name_str == NULL) 3994 return FALSE; 3995 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0 3996 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 3997 return FALSE; 3998 return TRUE; 3999 } 4000 4001 static bfd_boolean 4002 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) 4003 { 4004 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4005 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 4006 struct mach_o_dylib_command_external raw; 4007 unsigned int nameoff; 4008 unsigned int namelen; 4009 4010 switch (command->type) 4011 { 4012 case BFD_MACH_O_LC_LOAD_DYLIB: 4013 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 4014 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 4015 case BFD_MACH_O_LC_ID_DYLIB: 4016 case BFD_MACH_O_LC_REEXPORT_DYLIB: 4017 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 4018 break; 4019 default: 4020 BFD_FAIL (); 4021 return FALSE; 4022 } 4023 4024 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4025 return FALSE; 4026 4027 nameoff = bfd_h_get_32 (abfd, raw.name); 4028 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp); 4029 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version); 4030 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version); 4031 4032 cmd->name_offset = command->offset + nameoff; 4033 namelen = command->len - nameoff; 4034 cmd->name_str = bfd_alloc (abfd, namelen); 4035 if (cmd->name_str == NULL) 4036 return FALSE; 4037 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0 4038 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 4039 return FALSE; 4040 return TRUE; 4041 } 4042 4043 static bfd_boolean 4044 bfd_mach_o_read_prebound_dylib (bfd *abfd, 4045 bfd_mach_o_load_command *command) 4046 { 4047 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; 4048 struct mach_o_prebound_dylib_command_external raw; 4049 unsigned int nameoff; 4050 unsigned int modoff; 4051 unsigned int str_len; 4052 unsigned char *str; 4053 4054 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4055 return FALSE; 4056 4057 nameoff = bfd_h_get_32 (abfd, raw.name); 4058 modoff = bfd_h_get_32 (abfd, raw.linked_modules); 4059 if (nameoff > command->len || modoff > command->len) 4060 return FALSE; 4061 4062 str_len = command->len - sizeof (raw); 4063 str = bfd_alloc (abfd, str_len); 4064 if (str == NULL) 4065 return FALSE; 4066 if (bfd_bread (str, str_len, abfd) != str_len) 4067 return FALSE; 4068 4069 cmd->name_offset = command->offset + nameoff; 4070 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules); 4071 cmd->linked_modules_offset = command->offset + modoff; 4072 4073 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 4074 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 4075 return TRUE; 4076 } 4077 4078 static bfd_boolean 4079 bfd_mach_o_read_prebind_cksum (bfd *abfd, 4080 bfd_mach_o_load_command *command) 4081 { 4082 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum; 4083 struct mach_o_prebind_cksum_command_external raw; 4084 4085 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4086 return FALSE; 4087 4088 cmd->cksum = bfd_get_32 (abfd, raw.cksum); 4089 return TRUE; 4090 } 4091 4092 static bfd_boolean 4093 bfd_mach_o_read_twolevel_hints (bfd *abfd, 4094 bfd_mach_o_load_command *command) 4095 { 4096 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints; 4097 struct mach_o_twolevel_hints_command_external raw; 4098 4099 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4100 return FALSE; 4101 4102 cmd->offset = bfd_get_32 (abfd, raw.offset); 4103 cmd->nhints = bfd_get_32 (abfd, raw.nhints); 4104 return TRUE; 4105 } 4106 4107 static bfd_boolean 4108 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command) 4109 { 4110 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib; 4111 struct mach_o_fvmlib_command_external raw; 4112 unsigned int nameoff; 4113 unsigned int namelen; 4114 4115 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4116 return FALSE; 4117 4118 nameoff = bfd_h_get_32 (abfd, raw.name); 4119 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version); 4120 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr); 4121 4122 fvm->name_offset = command->offset + nameoff; 4123 namelen = command->len - nameoff; 4124 fvm->name_str = bfd_alloc (abfd, namelen); 4125 if (fvm->name_str == NULL) 4126 return FALSE; 4127 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0 4128 || bfd_bread (fvm->name_str, namelen, abfd) != namelen) 4129 return FALSE; 4130 return TRUE; 4131 } 4132 4133 static bfd_boolean 4134 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command) 4135 { 4136 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4137 bfd_mach_o_thread_command *cmd = &command->command.thread; 4138 unsigned int offset; 4139 unsigned int nflavours; 4140 unsigned int i; 4141 4142 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 4143 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 4144 4145 /* Count the number of threads. */ 4146 offset = 8; 4147 nflavours = 0; 4148 while (offset != command->len) 4149 { 4150 struct mach_o_thread_command_external raw; 4151 4152 if (offset >= command->len) 4153 return FALSE; 4154 4155 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4156 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4157 return FALSE; 4158 4159 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4; 4160 nflavours++; 4161 } 4162 4163 /* Allocate threads. */ 4164 cmd->flavours = bfd_alloc2 4165 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour)); 4166 if (cmd->flavours == NULL) 4167 return FALSE; 4168 cmd->nflavours = nflavours; 4169 4170 offset = 8; 4171 nflavours = 0; 4172 while (offset != command->len) 4173 { 4174 struct mach_o_thread_command_external raw; 4175 4176 if (offset >= command->len) 4177 return FALSE; 4178 4179 if (nflavours >= cmd->nflavours) 4180 return FALSE; 4181 4182 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4183 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4184 return FALSE; 4185 4186 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour); 4187 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw); 4188 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4; 4189 offset += cmd->flavours[nflavours].size + sizeof (raw); 4190 nflavours++; 4191 } 4192 4193 for (i = 0; i < nflavours; i++) 4194 { 4195 asection *bfdsec; 4196 unsigned int snamelen; 4197 char *sname; 4198 const char *flavourstr; 4199 const char *prefix = "LC_THREAD"; 4200 unsigned int j = 0; 4201 4202 switch (mdata->header.cputype) 4203 { 4204 case BFD_MACH_O_CPU_TYPE_POWERPC: 4205 case BFD_MACH_O_CPU_TYPE_POWERPC_64: 4206 flavourstr = 4207 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); 4208 break; 4209 case BFD_MACH_O_CPU_TYPE_I386: 4210 case BFD_MACH_O_CPU_TYPE_X86_64: 4211 flavourstr = 4212 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour); 4213 break; 4214 default: 4215 flavourstr = "UNKNOWN_ARCHITECTURE"; 4216 break; 4217 } 4218 4219 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1; 4220 sname = bfd_alloc (abfd, snamelen); 4221 if (sname == NULL) 4222 return FALSE; 4223 4224 for (;;) 4225 { 4226 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); 4227 if (bfd_get_section_by_name (abfd, sname) == NULL) 4228 break; 4229 j++; 4230 } 4231 4232 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS); 4233 4234 bfdsec->vma = 0; 4235 bfdsec->lma = 0; 4236 bfdsec->size = cmd->flavours[i].size; 4237 bfdsec->filepos = cmd->flavours[i].offset; 4238 bfdsec->alignment_power = 0x0; 4239 4240 cmd->section = bfdsec; 4241 } 4242 4243 return TRUE; 4244 } 4245 4246 static bfd_boolean 4247 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 4248 { 4249 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; 4250 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4251 4252 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 4253 4254 { 4255 struct mach_o_dysymtab_command_external raw; 4256 4257 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4258 return FALSE; 4259 4260 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym); 4261 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym); 4262 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym); 4263 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym); 4264 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym); 4265 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym); 4266 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff); 4267 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc); 4268 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff); 4269 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab); 4270 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff); 4271 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms); 4272 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff); 4273 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms); 4274 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff); 4275 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel); 4276 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff); 4277 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel); 4278 } 4279 4280 if (cmd->nmodtab != 0) 4281 { 4282 unsigned int i; 4283 int wide = bfd_mach_o_wide_p (abfd); 4284 unsigned int module_len = wide ? 56 : 52; 4285 4286 cmd->dylib_module = 4287 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module)); 4288 if (cmd->dylib_module == NULL) 4289 return FALSE; 4290 4291 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) 4292 return FALSE; 4293 4294 for (i = 0; i < cmd->nmodtab; i++) 4295 { 4296 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; 4297 unsigned long v; 4298 unsigned char buf[56]; 4299 4300 if (bfd_bread ((void *) buf, module_len, abfd) != module_len) 4301 return FALSE; 4302 4303 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0); 4304 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4); 4305 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8); 4306 module->irefsym = bfd_h_get_32 (abfd, buf + 12); 4307 module->nrefsym = bfd_h_get_32 (abfd, buf + 16); 4308 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20); 4309 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24); 4310 module->iextrel = bfd_h_get_32 (abfd, buf + 28); 4311 module->nextrel = bfd_h_get_32 (abfd, buf + 32); 4312 v = bfd_h_get_32 (abfd, buf +36); 4313 module->iinit = v & 0xffff; 4314 module->iterm = (v >> 16) & 0xffff; 4315 v = bfd_h_get_32 (abfd, buf + 40); 4316 module->ninit = v & 0xffff; 4317 module->nterm = (v >> 16) & 0xffff; 4318 if (wide) 4319 { 4320 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44); 4321 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48); 4322 } 4323 else 4324 { 4325 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44); 4326 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48); 4327 } 4328 } 4329 } 4330 4331 if (cmd->ntoc != 0) 4332 { 4333 unsigned long i; 4334 4335 cmd->dylib_toc = bfd_alloc2 4336 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content)); 4337 if (cmd->dylib_toc == NULL) 4338 return FALSE; 4339 4340 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) 4341 return FALSE; 4342 4343 for (i = 0; i < cmd->ntoc; i++) 4344 { 4345 struct mach_o_dylib_table_of_contents_external raw; 4346 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; 4347 4348 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4349 return FALSE; 4350 4351 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index); 4352 toc->module_index = bfd_h_get_32 (abfd, raw.module_index); 4353 } 4354 } 4355 4356 if (cmd->nindirectsyms != 0) 4357 { 4358 unsigned int i; 4359 4360 cmd->indirect_syms = bfd_alloc2 4361 (abfd, cmd->nindirectsyms, sizeof (unsigned int)); 4362 if (cmd->indirect_syms == NULL) 4363 return FALSE; 4364 4365 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) 4366 return FALSE; 4367 4368 for (i = 0; i < cmd->nindirectsyms; i++) 4369 { 4370 unsigned char raw[4]; 4371 unsigned int *is = &cmd->indirect_syms[i]; 4372 4373 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4374 return FALSE; 4375 4376 *is = bfd_h_get_32 (abfd, raw); 4377 } 4378 } 4379 4380 if (cmd->nextrefsyms != 0) 4381 { 4382 unsigned long v; 4383 unsigned int i; 4384 4385 cmd->ext_refs = bfd_alloc2 4386 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference)); 4387 if (cmd->ext_refs == NULL) 4388 return FALSE; 4389 4390 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) 4391 return FALSE; 4392 4393 for (i = 0; i < cmd->nextrefsyms; i++) 4394 { 4395 unsigned char raw[4]; 4396 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; 4397 4398 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4399 return FALSE; 4400 4401 /* Fields isym and flags are written as bit-fields, thus we need 4402 a specific processing for endianness. */ 4403 v = bfd_h_get_32 (abfd, raw); 4404 if (bfd_big_endian (abfd)) 4405 { 4406 ref->isym = (v >> 8) & 0xffffff; 4407 ref->flags = v & 0xff; 4408 } 4409 else 4410 { 4411 ref->isym = v & 0xffffff; 4412 ref->flags = (v >> 24) & 0xff; 4413 } 4414 } 4415 } 4416 4417 if (mdata->dysymtab) 4418 return FALSE; 4419 mdata->dysymtab = cmd; 4420 4421 return TRUE; 4422 } 4423 4424 static bfd_boolean 4425 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) 4426 { 4427 bfd_mach_o_symtab_command *symtab = &command->command.symtab; 4428 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4429 struct mach_o_symtab_command_external raw; 4430 4431 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 4432 4433 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4434 return FALSE; 4435 4436 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff); 4437 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms); 4438 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff); 4439 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize); 4440 symtab->symbols = NULL; 4441 symtab->strtab = NULL; 4442 4443 if (symtab->nsyms != 0) 4444 abfd->flags |= HAS_SYMS; 4445 4446 if (mdata->symtab) 4447 return FALSE; 4448 mdata->symtab = symtab; 4449 return TRUE; 4450 } 4451 4452 static bfd_boolean 4453 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command) 4454 { 4455 bfd_mach_o_uuid_command *cmd = &command->command.uuid; 4456 4457 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID); 4458 4459 if (bfd_bread (cmd->uuid, 16, abfd) != 16) 4460 return FALSE; 4461 4462 return TRUE; 4463 } 4464 4465 static bfd_boolean 4466 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command) 4467 { 4468 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit; 4469 struct mach_o_linkedit_data_command_external raw; 4470 4471 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4472 return FALSE; 4473 4474 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff); 4475 cmd->datasize = bfd_get_32 (abfd, raw.datasize); 4476 return TRUE; 4477 } 4478 4479 static bfd_boolean 4480 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command) 4481 { 4482 bfd_mach_o_str_command *cmd = &command->command.str; 4483 struct mach_o_str_command_external raw; 4484 unsigned long off; 4485 4486 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4487 return FALSE; 4488 4489 off = bfd_get_32 (abfd, raw.str); 4490 cmd->stroff = command->offset + off; 4491 cmd->str_len = command->len - off; 4492 cmd->str = bfd_alloc (abfd, cmd->str_len); 4493 if (cmd->str == NULL) 4494 return FALSE; 4495 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0 4496 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len) 4497 return FALSE; 4498 return TRUE; 4499 } 4500 4501 static unsigned char * 4502 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size) 4503 { 4504 unsigned char *buf; 4505 4506 buf = bfd_alloc (abfd, size); 4507 if (buf == NULL) 4508 return NULL; 4509 if (bfd_seek (abfd, off, SEEK_SET) != 0 4510 || bfd_bread (buf, size, abfd) != size) 4511 return NULL; 4512 return buf; 4513 } 4514 4515 static bfd_boolean 4516 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd) 4517 { 4518 /* Read rebase content. */ 4519 if (cmd->rebase_content == NULL && cmd->rebase_size != 0) 4520 { 4521 cmd->rebase_content = 4522 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size); 4523 if (cmd->rebase_content == NULL) 4524 return FALSE; 4525 } 4526 4527 /* Read bind content. */ 4528 if (cmd->bind_content == NULL && cmd->bind_size != 0) 4529 { 4530 cmd->bind_content = 4531 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size); 4532 if (cmd->bind_content == NULL) 4533 return FALSE; 4534 } 4535 4536 /* Read weak bind content. */ 4537 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0) 4538 { 4539 cmd->weak_bind_content = bfd_mach_o_alloc_and_read 4540 (abfd, cmd->weak_bind_off, cmd->weak_bind_size); 4541 if (cmd->weak_bind_content == NULL) 4542 return FALSE; 4543 } 4544 4545 /* Read lazy bind content. */ 4546 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0) 4547 { 4548 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read 4549 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size); 4550 if (cmd->lazy_bind_content == NULL) 4551 return FALSE; 4552 } 4553 4554 /* Read export content. */ 4555 if (cmd->export_content == NULL && cmd->export_size != 0) 4556 { 4557 cmd->export_content = bfd_mach_o_alloc_and_read 4558 (abfd, cmd->export_off, cmd->export_size); 4559 if (cmd->export_content == NULL) 4560 return FALSE; 4561 } 4562 4563 return TRUE; 4564 } 4565 4566 static bfd_boolean 4567 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) 4568 { 4569 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; 4570 struct mach_o_dyld_info_command_external raw; 4571 4572 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4573 return FALSE; 4574 4575 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off); 4576 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size); 4577 cmd->rebase_content = NULL; 4578 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off); 4579 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size); 4580 cmd->bind_content = NULL; 4581 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off); 4582 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size); 4583 cmd->weak_bind_content = NULL; 4584 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off); 4585 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size); 4586 cmd->lazy_bind_content = NULL; 4587 cmd->export_off = bfd_get_32 (abfd, raw.export_off); 4588 cmd->export_size = bfd_get_32 (abfd, raw.export_size); 4589 cmd->export_content = NULL; 4590 return TRUE; 4591 } 4592 4593 static bfd_boolean 4594 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command) 4595 { 4596 bfd_mach_o_version_min_command *cmd = &command->command.version_min; 4597 struct mach_o_version_min_command_external raw; 4598 unsigned int ver; 4599 4600 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4601 return FALSE; 4602 4603 ver = bfd_get_32 (abfd, raw.version); 4604 cmd->rel = ver >> 16; 4605 cmd->maj = ver >> 8; 4606 cmd->min = ver; 4607 cmd->reserved = bfd_get_32 (abfd, raw.reserved); 4608 return TRUE; 4609 } 4610 4611 static bfd_boolean 4612 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command) 4613 { 4614 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4615 struct mach_o_encryption_info_command_external raw; 4616 4617 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4618 return FALSE; 4619 4620 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4621 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4622 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4623 return TRUE; 4624 } 4625 4626 static bfd_boolean 4627 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command) 4628 { 4629 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4630 struct mach_o_encryption_info_64_command_external raw; 4631 4632 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4633 return FALSE; 4634 4635 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4636 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4637 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4638 return TRUE; 4639 } 4640 4641 static bfd_boolean 4642 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command) 4643 { 4644 bfd_mach_o_main_command *cmd = &command->command.main; 4645 struct mach_o_entry_point_command_external raw; 4646 4647 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4648 return FALSE; 4649 4650 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff); 4651 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize); 4652 return TRUE; 4653 } 4654 4655 static bfd_boolean 4656 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command) 4657 { 4658 bfd_mach_o_source_version_command *cmd = &command->command.source_version; 4659 struct mach_o_source_version_command_external raw; 4660 bfd_uint64_t ver; 4661 4662 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4663 return FALSE; 4664 4665 ver = bfd_get_64 (abfd, raw.version); 4666 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc 4667 generates warnings) in case of the host doesn't support 64 bit 4668 integers. */ 4669 cmd->e = ver & 0x3ff; 4670 ver >>= 10; 4671 cmd->d = ver & 0x3ff; 4672 ver >>= 10; 4673 cmd->c = ver & 0x3ff; 4674 ver >>= 10; 4675 cmd->b = ver & 0x3ff; 4676 ver >>= 10; 4677 cmd->a = ver & 0xffffff; 4678 return TRUE; 4679 } 4680 4681 static bfd_boolean 4682 bfd_mach_o_read_segment (bfd *abfd, 4683 bfd_mach_o_load_command *command, 4684 unsigned int wide) 4685 { 4686 bfd_mach_o_segment_command *seg = &command->command.segment; 4687 unsigned long i; 4688 4689 if (wide) 4690 { 4691 struct mach_o_segment_command_64_external raw; 4692 4693 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); 4694 4695 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4696 return FALSE; 4697 4698 memcpy (seg->segname, raw.segname, 16); 4699 seg->segname[16] = '\0'; 4700 4701 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr); 4702 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize); 4703 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff); 4704 seg->filesize = bfd_h_get_64 (abfd, raw.filesize); 4705 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4706 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4707 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4708 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4709 } 4710 else 4711 { 4712 struct mach_o_segment_command_32_external raw; 4713 4714 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 4715 4716 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4717 return FALSE; 4718 4719 memcpy (seg->segname, raw.segname, 16); 4720 seg->segname[16] = '\0'; 4721 4722 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr); 4723 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize); 4724 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff); 4725 seg->filesize = bfd_h_get_32 (abfd, raw.filesize); 4726 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4727 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4728 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4729 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4730 } 4731 seg->sect_head = NULL; 4732 seg->sect_tail = NULL; 4733 4734 for (i = 0; i < seg->nsects; i++) 4735 { 4736 asection *sec; 4737 4738 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide); 4739 if (sec == NULL) 4740 return FALSE; 4741 4742 bfd_mach_o_append_section_to_segment 4743 (seg, bfd_mach_o_get_mach_o_section (sec)); 4744 } 4745 4746 return TRUE; 4747 } 4748 4749 static bfd_boolean 4750 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) 4751 { 4752 return bfd_mach_o_read_segment (abfd, command, 0); 4753 } 4754 4755 static bfd_boolean 4756 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) 4757 { 4758 return bfd_mach_o_read_segment (abfd, command, 1); 4759 } 4760 4761 static bfd_boolean 4762 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command) 4763 { 4764 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4765 struct mach_o_load_command_external raw; 4766 unsigned int cmd; 4767 4768 /* Read command type and length. */ 4769 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0 4770 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE) 4771 return FALSE; 4772 4773 cmd = bfd_h_get_32 (abfd, raw.cmd); 4774 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD; 4775 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE; 4776 command->len = bfd_h_get_32 (abfd, raw.cmdsize); 4777 4778 switch (command->type) 4779 { 4780 case BFD_MACH_O_LC_SEGMENT: 4781 if (!bfd_mach_o_read_segment_32 (abfd, command)) 4782 return FALSE; 4783 break; 4784 case BFD_MACH_O_LC_SEGMENT_64: 4785 if (!bfd_mach_o_read_segment_64 (abfd, command)) 4786 return FALSE; 4787 break; 4788 case BFD_MACH_O_LC_SYMTAB: 4789 if (!bfd_mach_o_read_symtab (abfd, command)) 4790 return FALSE; 4791 break; 4792 case BFD_MACH_O_LC_SYMSEG: 4793 break; 4794 case BFD_MACH_O_LC_THREAD: 4795 case BFD_MACH_O_LC_UNIXTHREAD: 4796 if (!bfd_mach_o_read_thread (abfd, command)) 4797 return FALSE; 4798 break; 4799 case BFD_MACH_O_LC_LOAD_DYLINKER: 4800 case BFD_MACH_O_LC_ID_DYLINKER: 4801 case BFD_MACH_O_LC_DYLD_ENVIRONMENT: 4802 if (!bfd_mach_o_read_dylinker (abfd, command)) 4803 return FALSE; 4804 break; 4805 case BFD_MACH_O_LC_LOAD_DYLIB: 4806 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 4807 case BFD_MACH_O_LC_ID_DYLIB: 4808 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 4809 case BFD_MACH_O_LC_REEXPORT_DYLIB: 4810 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 4811 if (!bfd_mach_o_read_dylib (abfd, command)) 4812 return FALSE; 4813 break; 4814 case BFD_MACH_O_LC_PREBOUND_DYLIB: 4815 if (!bfd_mach_o_read_prebound_dylib (abfd, command)) 4816 return FALSE; 4817 break; 4818 case BFD_MACH_O_LC_LOADFVMLIB: 4819 case BFD_MACH_O_LC_IDFVMLIB: 4820 if (!bfd_mach_o_read_fvmlib (abfd, command)) 4821 return FALSE; 4822 break; 4823 case BFD_MACH_O_LC_IDENT: 4824 case BFD_MACH_O_LC_FVMFILE: 4825 case BFD_MACH_O_LC_PREPAGE: 4826 case BFD_MACH_O_LC_ROUTINES: 4827 case BFD_MACH_O_LC_ROUTINES_64: 4828 break; 4829 case BFD_MACH_O_LC_SUB_FRAMEWORK: 4830 case BFD_MACH_O_LC_SUB_UMBRELLA: 4831 case BFD_MACH_O_LC_SUB_LIBRARY: 4832 case BFD_MACH_O_LC_SUB_CLIENT: 4833 case BFD_MACH_O_LC_RPATH: 4834 if (!bfd_mach_o_read_str (abfd, command)) 4835 return FALSE; 4836 break; 4837 case BFD_MACH_O_LC_DYSYMTAB: 4838 if (!bfd_mach_o_read_dysymtab (abfd, command)) 4839 return FALSE; 4840 break; 4841 case BFD_MACH_O_LC_PREBIND_CKSUM: 4842 if (!bfd_mach_o_read_prebind_cksum (abfd, command)) 4843 return FALSE; 4844 break; 4845 case BFD_MACH_O_LC_TWOLEVEL_HINTS: 4846 if (!bfd_mach_o_read_twolevel_hints (abfd, command)) 4847 return FALSE; 4848 break; 4849 case BFD_MACH_O_LC_UUID: 4850 if (!bfd_mach_o_read_uuid (abfd, command)) 4851 return FALSE; 4852 break; 4853 case BFD_MACH_O_LC_CODE_SIGNATURE: 4854 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO: 4855 case BFD_MACH_O_LC_FUNCTION_STARTS: 4856 case BFD_MACH_O_LC_DATA_IN_CODE: 4857 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS: 4858 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT: 4859 if (!bfd_mach_o_read_linkedit (abfd, command)) 4860 return FALSE; 4861 break; 4862 case BFD_MACH_O_LC_ENCRYPTION_INFO: 4863 if (!bfd_mach_o_read_encryption_info (abfd, command)) 4864 return FALSE; 4865 break; 4866 case BFD_MACH_O_LC_ENCRYPTION_INFO_64: 4867 if (!bfd_mach_o_read_encryption_info_64 (abfd, command)) 4868 return FALSE; 4869 break; 4870 case BFD_MACH_O_LC_DYLD_INFO: 4871 if (!bfd_mach_o_read_dyld_info (abfd, command)) 4872 return FALSE; 4873 break; 4874 case BFD_MACH_O_LC_VERSION_MIN_MACOSX: 4875 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS: 4876 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS: 4877 if (!bfd_mach_o_read_version_min (abfd, command)) 4878 return FALSE; 4879 break; 4880 case BFD_MACH_O_LC_MAIN: 4881 if (!bfd_mach_o_read_main (abfd, command)) 4882 return FALSE; 4883 break; 4884 case BFD_MACH_O_LC_SOURCE_VERSION: 4885 if (!bfd_mach_o_read_source_version (abfd, command)) 4886 return FALSE; 4887 break; 4888 default: 4889 command->len = 0; 4890 _bfd_error_handler (_("%pB: unknown load command %#x"), 4891 abfd, command->type); 4892 return FALSE; 4893 } 4894 4895 return TRUE; 4896 } 4897 4898 static void 4899 bfd_mach_o_flatten_sections (bfd *abfd) 4900 { 4901 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4902 bfd_mach_o_load_command *cmd; 4903 long csect = 0; 4904 4905 /* Count total number of sections. */ 4906 mdata->nsects = 0; 4907 4908 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4909 { 4910 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4911 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4912 { 4913 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4914 4915 mdata->nsects += seg->nsects; 4916 } 4917 } 4918 4919 /* Allocate sections array. */ 4920 mdata->sections = bfd_alloc2 (abfd, 4921 mdata->nsects, sizeof (bfd_mach_o_section *)); 4922 4923 /* Fill the array. */ 4924 csect = 0; 4925 4926 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4927 { 4928 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4929 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4930 { 4931 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4932 bfd_mach_o_section *sec; 4933 4934 BFD_ASSERT (csect + seg->nsects <= mdata->nsects); 4935 4936 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 4937 mdata->sections[csect++] = sec; 4938 } 4939 } 4940 } 4941 4942 static bfd_boolean 4943 bfd_mach_o_scan_start_address (bfd *abfd) 4944 { 4945 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4946 bfd_mach_o_thread_command *thr = NULL; 4947 bfd_mach_o_load_command *cmd; 4948 unsigned long i; 4949 4950 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4951 if (cmd->type == BFD_MACH_O_LC_THREAD 4952 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD) 4953 { 4954 thr = &cmd->command.thread; 4955 break; 4956 } 4957 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1) 4958 { 4959 bfd_mach_o_main_command *main_cmd = &cmd->command.main; 4960 bfd_mach_o_section *text_sect = mdata->sections[0]; 4961 4962 if (text_sect) 4963 { 4964 abfd->start_address = main_cmd->entryoff 4965 + (text_sect->addr - text_sect->offset); 4966 return TRUE; 4967 } 4968 } 4969 4970 /* An object file has no start address, so do not fail if not found. */ 4971 if (thr == NULL) 4972 return TRUE; 4973 4974 /* FIXME: create a subtarget hook ? */ 4975 for (i = 0; i < thr->nflavours; i++) 4976 { 4977 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386) 4978 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32)) 4979 { 4980 unsigned char buf[4]; 4981 4982 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0 4983 || bfd_bread (buf, 4, abfd) != 4) 4984 return FALSE; 4985 4986 abfd->start_address = bfd_h_get_32 (abfd, buf); 4987 } 4988 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC) 4989 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE)) 4990 { 4991 unsigned char buf[4]; 4992 4993 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 4994 || bfd_bread (buf, 4, abfd) != 4) 4995 return FALSE; 4996 4997 abfd->start_address = bfd_h_get_32 (abfd, buf); 4998 } 4999 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64) 5000 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64)) 5001 { 5002 unsigned char buf[8]; 5003 5004 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 5005 || bfd_bread (buf, 8, abfd) != 8) 5006 return FALSE; 5007 5008 abfd->start_address = bfd_h_get_64 (abfd, buf); 5009 } 5010 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64) 5011 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64)) 5012 { 5013 unsigned char buf[8]; 5014 5015 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0 5016 || bfd_bread (buf, 8, abfd) != 8) 5017 return FALSE; 5018 5019 abfd->start_address = bfd_h_get_64 (abfd, buf); 5020 } 5021 } 5022 5023 return TRUE; 5024 } 5025 5026 bfd_boolean 5027 bfd_mach_o_set_arch_mach (bfd *abfd, 5028 enum bfd_architecture arch, 5029 unsigned long machine) 5030 { 5031 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 5032 5033 /* If this isn't the right architecture for this backend, and this 5034 isn't the generic backend, fail. */ 5035 if (arch != bed->arch 5036 && arch != bfd_arch_unknown 5037 && bed->arch != bfd_arch_unknown) 5038 return FALSE; 5039 5040 return bfd_default_set_arch_mach (abfd, arch, machine); 5041 } 5042 5043 static bfd_boolean 5044 bfd_mach_o_scan (bfd *abfd, 5045 bfd_mach_o_header *header, 5046 bfd_mach_o_data_struct *mdata) 5047 { 5048 unsigned int i; 5049 enum bfd_architecture cputype; 5050 unsigned long cpusubtype; 5051 unsigned int hdrsize; 5052 5053 hdrsize = mach_o_wide_p (header) ? 5054 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 5055 5056 mdata->header = *header; 5057 5058 abfd->flags = abfd->flags & BFD_IN_MEMORY; 5059 switch (header->filetype) 5060 { 5061 case BFD_MACH_O_MH_OBJECT: 5062 abfd->flags |= HAS_RELOC; 5063 break; 5064 case BFD_MACH_O_MH_EXECUTE: 5065 abfd->flags |= EXEC_P; 5066 break; 5067 case BFD_MACH_O_MH_DYLIB: 5068 case BFD_MACH_O_MH_BUNDLE: 5069 abfd->flags |= DYNAMIC; 5070 break; 5071 } 5072 5073 abfd->tdata.mach_o_data = mdata; 5074 5075 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, 5076 &cputype, &cpusubtype); 5077 if (cputype == bfd_arch_unknown) 5078 { 5079 _bfd_error_handler 5080 /* xgettext:c-format */ 5081 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"), 5082 header->cputype, header->cpusubtype); 5083 return FALSE; 5084 } 5085 5086 bfd_set_arch_mach (abfd, cputype, cpusubtype); 5087 5088 if (header->ncmds != 0) 5089 { 5090 bfd_mach_o_load_command *cmd; 5091 5092 mdata->first_command = NULL; 5093 mdata->last_command = NULL; 5094 5095 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command)); 5096 if (cmd == NULL) 5097 return FALSE; 5098 5099 for (i = 0; i < header->ncmds; i++) 5100 { 5101 bfd_mach_o_load_command *cur = &cmd[i]; 5102 5103 bfd_mach_o_append_command (abfd, cur); 5104 5105 if (i == 0) 5106 cur->offset = hdrsize; 5107 else 5108 { 5109 bfd_mach_o_load_command *prev = &cmd[i - 1]; 5110 cur->offset = prev->offset + prev->len; 5111 } 5112 5113 if (!bfd_mach_o_read_command (abfd, cur)) 5114 return FALSE; 5115 } 5116 } 5117 5118 /* Sections should be flatten before scanning start address. */ 5119 bfd_mach_o_flatten_sections (abfd); 5120 if (!bfd_mach_o_scan_start_address (abfd)) 5121 return FALSE; 5122 5123 return TRUE; 5124 } 5125 5126 bfd_boolean 5127 bfd_mach_o_mkobject_init (bfd *abfd) 5128 { 5129 bfd_mach_o_data_struct *mdata = NULL; 5130 5131 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); 5132 if (mdata == NULL) 5133 return FALSE; 5134 abfd->tdata.mach_o_data = mdata; 5135 5136 mdata->header.magic = 0; 5137 mdata->header.cputype = 0; 5138 mdata->header.cpusubtype = 0; 5139 mdata->header.filetype = 0; 5140 mdata->header.ncmds = 0; 5141 mdata->header.sizeofcmds = 0; 5142 mdata->header.flags = 0; 5143 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN; 5144 mdata->first_command = NULL; 5145 mdata->last_command = NULL; 5146 mdata->nsects = 0; 5147 mdata->sections = NULL; 5148 mdata->dyn_reloc_cache = NULL; 5149 5150 return TRUE; 5151 } 5152 5153 static bfd_boolean 5154 bfd_mach_o_gen_mkobject (bfd *abfd) 5155 { 5156 bfd_mach_o_data_struct *mdata; 5157 5158 if (!bfd_mach_o_mkobject_init (abfd)) 5159 return FALSE; 5160 5161 mdata = bfd_mach_o_get_data (abfd); 5162 mdata->header.magic = BFD_MACH_O_MH_MAGIC; 5163 mdata->header.cputype = 0; 5164 mdata->header.cpusubtype = 0; 5165 mdata->header.byteorder = abfd->xvec->byteorder; 5166 mdata->header.version = 1; 5167 5168 return TRUE; 5169 } 5170 5171 const bfd_target * 5172 bfd_mach_o_header_p (bfd *abfd, 5173 file_ptr hdr_off, 5174 bfd_mach_o_filetype filetype, 5175 bfd_mach_o_cpu_type cputype) 5176 { 5177 bfd_mach_o_header header; 5178 bfd_mach_o_data_struct *mdata; 5179 5180 if (!bfd_mach_o_read_header (abfd, hdr_off, &header)) 5181 goto wrong; 5182 5183 if (! (header.byteorder == BFD_ENDIAN_BIG 5184 || header.byteorder == BFD_ENDIAN_LITTLE)) 5185 { 5186 _bfd_error_handler (_("unknown header byte-order value %#x"), 5187 header.byteorder); 5188 goto wrong; 5189 } 5190 5191 if (! ((header.byteorder == BFD_ENDIAN_BIG 5192 && abfd->xvec->byteorder == BFD_ENDIAN_BIG 5193 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) 5194 || (header.byteorder == BFD_ENDIAN_LITTLE 5195 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE 5196 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) 5197 goto wrong; 5198 5199 /* Check cputype and filetype. 5200 In case of wildcard, do not accept magics that are handled by existing 5201 targets. */ 5202 if (cputype) 5203 { 5204 if (header.cputype != cputype) 5205 goto wrong; 5206 } 5207 else 5208 { 5209 #ifndef BFD64 5210 /* Do not recognize 64 architectures if not configured for 64bit targets. 5211 This could happen only for generic targets. */ 5212 if (mach_o_wide_p (&header)) 5213 goto wrong; 5214 #endif 5215 } 5216 5217 if (filetype) 5218 { 5219 if (header.filetype != filetype) 5220 goto wrong; 5221 } 5222 else 5223 { 5224 switch (header.filetype) 5225 { 5226 case BFD_MACH_O_MH_CORE: 5227 /* Handled by core_p */ 5228 goto wrong; 5229 default: 5230 break; 5231 } 5232 } 5233 5234 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata)); 5235 if (mdata == NULL) 5236 goto fail; 5237 mdata->hdr_offset = hdr_off; 5238 5239 if (!bfd_mach_o_scan (abfd, &header, mdata)) 5240 goto wrong; 5241 5242 return abfd->xvec; 5243 5244 wrong: 5245 bfd_set_error (bfd_error_wrong_format); 5246 5247 fail: 5248 return NULL; 5249 } 5250 5251 static const bfd_target * 5252 bfd_mach_o_gen_object_p (bfd *abfd) 5253 { 5254 return bfd_mach_o_header_p (abfd, 0, 0, 0); 5255 } 5256 5257 static const bfd_target * 5258 bfd_mach_o_gen_core_p (bfd *abfd) 5259 { 5260 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0); 5261 } 5262 5263 /* Return the base address of ABFD, ie the address at which the image is 5264 mapped. The possible initial pagezero is ignored. */ 5265 5266 bfd_vma 5267 bfd_mach_o_get_base_address (bfd *abfd) 5268 { 5269 bfd_mach_o_data_struct *mdata; 5270 bfd_mach_o_load_command *cmd; 5271 5272 /* Check for Mach-O. */ 5273 if (!bfd_mach_o_valid (abfd)) 5274 return 0; 5275 mdata = bfd_mach_o_get_data (abfd); 5276 5277 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5278 { 5279 if ((cmd->type == BFD_MACH_O_LC_SEGMENT 5280 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)) 5281 { 5282 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment; 5283 5284 if (segcmd->initprot != 0) 5285 return segcmd->vmaddr; 5286 } 5287 } 5288 return 0; 5289 } 5290 5291 typedef struct mach_o_fat_archentry 5292 { 5293 unsigned long cputype; 5294 unsigned long cpusubtype; 5295 unsigned long offset; 5296 unsigned long size; 5297 unsigned long align; 5298 } mach_o_fat_archentry; 5299 5300 typedef struct mach_o_fat_data_struct 5301 { 5302 unsigned long magic; 5303 unsigned long nfat_arch; 5304 mach_o_fat_archentry *archentries; 5305 } mach_o_fat_data_struct; 5306 5307 const bfd_target * 5308 bfd_mach_o_fat_archive_p (bfd *abfd) 5309 { 5310 mach_o_fat_data_struct *adata = NULL; 5311 struct mach_o_fat_header_external hdr; 5312 unsigned long i; 5313 5314 if (bfd_seek (abfd, 0, SEEK_SET) != 0 5315 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr)) 5316 goto error; 5317 5318 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); 5319 if (adata == NULL) 5320 goto error; 5321 5322 adata->magic = bfd_getb32 (hdr.magic); 5323 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch); 5324 if (adata->magic != 0xcafebabe) 5325 goto error; 5326 /* Avoid matching Java bytecode files, which have the same magic number. 5327 In the Java bytecode file format this field contains the JVM version, 5328 which starts at 43.0. */ 5329 if (adata->nfat_arch > 30) 5330 goto error; 5331 5332 adata->archentries = 5333 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry)); 5334 if (adata->archentries == NULL) 5335 goto error; 5336 5337 for (i = 0; i < adata->nfat_arch; i++) 5338 { 5339 struct mach_o_fat_arch_external arch; 5340 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch)) 5341 goto error; 5342 adata->archentries[i].cputype = bfd_getb32 (arch.cputype); 5343 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype); 5344 adata->archentries[i].offset = bfd_getb32 (arch.offset); 5345 adata->archentries[i].size = bfd_getb32 (arch.size); 5346 adata->archentries[i].align = bfd_getb32 (arch.align); 5347 } 5348 5349 abfd->tdata.mach_o_fat_data = adata; 5350 5351 return abfd->xvec; 5352 5353 error: 5354 if (adata != NULL) 5355 bfd_release (abfd, adata); 5356 bfd_set_error (bfd_error_wrong_format); 5357 return NULL; 5358 } 5359 5360 /* Set the filename for a fat binary member ABFD, whose bfd architecture is 5361 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY. 5362 Set arelt_data and origin fields too. */ 5363 5364 static void 5365 bfd_mach_o_fat_member_init (bfd *abfd, 5366 enum bfd_architecture arch_type, 5367 unsigned long arch_subtype, 5368 mach_o_fat_archentry *entry) 5369 { 5370 struct areltdata *areltdata; 5371 /* Create the member filename. Use ARCH_NAME. */ 5372 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype); 5373 5374 if (ap) 5375 { 5376 /* Use the architecture name if known. */ 5377 abfd->filename = xstrdup (ap->printable_name); 5378 } 5379 else 5380 { 5381 /* Forge a uniq id. */ 5382 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1; 5383 char *name = xmalloc (namelen); 5384 snprintf (name, namelen, "0x%lx-0x%lx", 5385 entry->cputype, entry->cpusubtype); 5386 abfd->filename = name; 5387 } 5388 5389 areltdata = bfd_zmalloc (sizeof (struct areltdata)); 5390 areltdata->parsed_size = entry->size; 5391 abfd->arelt_data = areltdata; 5392 abfd->iostream = NULL; 5393 abfd->origin = entry->offset; 5394 } 5395 5396 bfd * 5397 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev) 5398 { 5399 mach_o_fat_data_struct *adata; 5400 mach_o_fat_archentry *entry = NULL; 5401 unsigned long i; 5402 bfd *nbfd; 5403 enum bfd_architecture arch_type; 5404 unsigned long arch_subtype; 5405 5406 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; 5407 BFD_ASSERT (adata != NULL); 5408 5409 /* Find index of previous entry. */ 5410 if (prev == NULL) 5411 { 5412 /* Start at first one. */ 5413 i = 0; 5414 } 5415 else 5416 { 5417 /* Find index of PREV. */ 5418 for (i = 0; i < adata->nfat_arch; i++) 5419 { 5420 if (adata->archentries[i].offset == prev->origin) 5421 break; 5422 } 5423 5424 if (i == adata->nfat_arch) 5425 { 5426 /* Not found. */ 5427 bfd_set_error (bfd_error_bad_value); 5428 return NULL; 5429 } 5430 5431 /* Get next entry. */ 5432 i++; 5433 } 5434 5435 if (i >= adata->nfat_arch) 5436 { 5437 bfd_set_error (bfd_error_no_more_archived_files); 5438 return NULL; 5439 } 5440 5441 entry = &adata->archentries[i]; 5442 nbfd = _bfd_new_bfd_contained_in (archive); 5443 if (nbfd == NULL) 5444 return NULL; 5445 5446 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype, 5447 &arch_type, &arch_subtype); 5448 5449 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry); 5450 5451 bfd_set_arch_mach (nbfd, arch_type, arch_subtype); 5452 5453 return nbfd; 5454 } 5455 5456 /* Analogous to stat call. */ 5457 5458 static int 5459 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf) 5460 { 5461 if (abfd->arelt_data == NULL) 5462 { 5463 bfd_set_error (bfd_error_invalid_operation); 5464 return -1; 5465 } 5466 5467 buf->st_mtime = 0; 5468 buf->st_uid = 0; 5469 buf->st_gid = 0; 5470 buf->st_mode = 0644; 5471 buf->st_size = arelt_size (abfd); 5472 5473 return 0; 5474 } 5475 5476 /* If ABFD format is FORMAT and architecture is ARCH, return it. 5477 If ABFD is a fat image containing a member that corresponds to FORMAT 5478 and ARCH, returns it. 5479 In other case, returns NULL. 5480 This function allows transparent uses of fat images. */ 5481 5482 bfd * 5483 bfd_mach_o_fat_extract (bfd *abfd, 5484 bfd_format format, 5485 const bfd_arch_info_type *arch) 5486 { 5487 bfd *res; 5488 mach_o_fat_data_struct *adata; 5489 unsigned int i; 5490 5491 if (bfd_check_format (abfd, format)) 5492 { 5493 if (bfd_get_arch_info (abfd) == arch) 5494 return abfd; 5495 return NULL; 5496 } 5497 if (!bfd_check_format (abfd, bfd_archive) 5498 || abfd->xvec != &mach_o_fat_vec) 5499 return NULL; 5500 5501 /* This is a Mach-O fat image. */ 5502 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data; 5503 BFD_ASSERT (adata != NULL); 5504 5505 for (i = 0; i < adata->nfat_arch; i++) 5506 { 5507 struct mach_o_fat_archentry *e = &adata->archentries[i]; 5508 enum bfd_architecture cpu_type; 5509 unsigned long cpu_subtype; 5510 5511 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype, 5512 &cpu_type, &cpu_subtype); 5513 if (cpu_type != arch->arch || cpu_subtype != arch->mach) 5514 continue; 5515 5516 /* The architecture is found. */ 5517 res = _bfd_new_bfd_contained_in (abfd); 5518 if (res == NULL) 5519 return NULL; 5520 5521 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e); 5522 5523 if (bfd_check_format (res, format)) 5524 { 5525 BFD_ASSERT (bfd_get_arch_info (res) == arch); 5526 return res; 5527 } 5528 bfd_close (res); 5529 return NULL; 5530 } 5531 5532 return NULL; 5533 } 5534 5535 int 5536 bfd_mach_o_lookup_command (bfd *abfd, 5537 bfd_mach_o_load_command_type type, 5538 bfd_mach_o_load_command **mcommand) 5539 { 5540 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5541 struct bfd_mach_o_load_command *cmd; 5542 unsigned int num; 5543 5544 BFD_ASSERT (mdata != NULL); 5545 BFD_ASSERT (mcommand != NULL); 5546 5547 num = 0; 5548 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5549 { 5550 if (cmd->type != type) 5551 continue; 5552 5553 if (num == 0) 5554 *mcommand = cmd; 5555 num++; 5556 } 5557 5558 return num; 5559 } 5560 5561 unsigned long 5562 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type) 5563 { 5564 switch (type) 5565 { 5566 case BFD_MACH_O_CPU_TYPE_MC680x0: 5567 return 0x04000000; 5568 case BFD_MACH_O_CPU_TYPE_POWERPC: 5569 return 0xc0000000; 5570 case BFD_MACH_O_CPU_TYPE_I386: 5571 return 0xc0000000; 5572 case BFD_MACH_O_CPU_TYPE_SPARC: 5573 return 0xf0000000; 5574 case BFD_MACH_O_CPU_TYPE_HPPA: 5575 return 0xc0000000 - 0x04000000; 5576 default: 5577 return 0; 5578 } 5579 } 5580 5581 /* The following two tables should be kept, as far as possible, in order of 5582 most frequently used entries to optimize their use from gas. */ 5583 5584 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] = 5585 { 5586 { "regular", BFD_MACH_O_S_REGULAR}, 5587 { "coalesced", BFD_MACH_O_S_COALESCED}, 5588 { "zerofill", BFD_MACH_O_S_ZEROFILL}, 5589 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS}, 5590 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS}, 5591 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS}, 5592 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS}, 5593 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS}, 5594 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS}, 5595 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS}, 5596 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL}, 5597 { "interposing", BFD_MACH_O_S_INTERPOSING}, 5598 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF}, 5599 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS}, 5600 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS}, 5601 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS}, 5602 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS}, 5603 { NULL, 0} 5604 }; 5605 5606 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] = 5607 { 5608 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS }, 5609 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS }, 5610 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC }, 5611 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC }, 5612 { "debug", BFD_MACH_O_S_ATTR_DEBUG }, 5613 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT }, 5614 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP }, 5615 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS }, 5616 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC }, 5617 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5618 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5619 { NULL, 0} 5620 }; 5621 5622 /* Get the section type from NAME. Return 256 if NAME is unknown. */ 5623 5624 unsigned int 5625 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name) 5626 { 5627 const bfd_mach_o_xlat_name *x; 5628 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 5629 5630 for (x = bfd_mach_o_section_type_name; x->name; x++) 5631 if (strcmp (x->name, name) == 0) 5632 { 5633 /* We found it... does the target support it? */ 5634 if (bed->bfd_mach_o_section_type_valid_for_target == NULL 5635 || bed->bfd_mach_o_section_type_valid_for_target (x->val)) 5636 return x->val; /* OK. */ 5637 else 5638 break; /* Not supported. */ 5639 } 5640 /* Maximum section ID = 0xff. */ 5641 return 256; 5642 } 5643 5644 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */ 5645 5646 unsigned int 5647 bfd_mach_o_get_section_attribute_from_name (const char *name) 5648 { 5649 const bfd_mach_o_xlat_name *x; 5650 5651 for (x = bfd_mach_o_section_attribute_name; x->name; x++) 5652 if (strcmp (x->name, name) == 0) 5653 return x->val; 5654 return (unsigned int)-1; 5655 } 5656 5657 int 5658 bfd_mach_o_core_fetch_environment (bfd *abfd, 5659 unsigned char **rbuf, 5660 unsigned int *rlen) 5661 { 5662 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5663 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype); 5664 bfd_mach_o_load_command *cmd; 5665 5666 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5667 { 5668 bfd_mach_o_segment_command *seg; 5669 5670 if (cmd->type != BFD_MACH_O_LC_SEGMENT) 5671 continue; 5672 5673 seg = &cmd->command.segment; 5674 5675 if ((seg->vmaddr + seg->vmsize) == stackaddr) 5676 { 5677 unsigned long start = seg->fileoff; 5678 unsigned long end = seg->fileoff + seg->filesize; 5679 unsigned char *buf = bfd_malloc (1024); 5680 unsigned long size = 1024; 5681 5682 for (;;) 5683 { 5684 bfd_size_type nread = 0; 5685 unsigned long offset; 5686 int found_nonnull = 0; 5687 5688 if (size > (end - start)) 5689 size = (end - start); 5690 5691 buf = bfd_realloc_or_free (buf, size); 5692 if (buf == NULL) 5693 return -1; 5694 5695 if (bfd_seek (abfd, end - size, SEEK_SET) != 0) 5696 { 5697 free (buf); 5698 return -1; 5699 } 5700 5701 nread = bfd_bread (buf, size, abfd); 5702 5703 if (nread != size) 5704 { 5705 free (buf); 5706 return -1; 5707 } 5708 5709 for (offset = 4; offset <= size; offset += 4) 5710 { 5711 unsigned long val; 5712 5713 val = *((unsigned long *) (buf + size - offset)); 5714 if (! found_nonnull) 5715 { 5716 if (val != 0) 5717 found_nonnull = 1; 5718 } 5719 else if (val == 0x0) 5720 { 5721 unsigned long bottom; 5722 unsigned long top; 5723 5724 bottom = seg->fileoff + seg->filesize - offset; 5725 top = seg->fileoff + seg->filesize - 4; 5726 *rbuf = bfd_malloc (top - bottom); 5727 *rlen = top - bottom; 5728 5729 memcpy (*rbuf, buf + size - *rlen, *rlen); 5730 free (buf); 5731 return 0; 5732 } 5733 } 5734 5735 if (size == (end - start)) 5736 break; 5737 5738 size *= 2; 5739 } 5740 5741 free (buf); 5742 } 5743 } 5744 5745 return -1; 5746 } 5747 5748 char * 5749 bfd_mach_o_core_file_failing_command (bfd *abfd) 5750 { 5751 unsigned char *buf = NULL; 5752 unsigned int len = 0; 5753 int ret; 5754 5755 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len); 5756 if (ret < 0) 5757 return NULL; 5758 5759 return (char *) buf; 5760 } 5761 5762 int 5763 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 5764 { 5765 return 0; 5766 } 5767 5768 static bfd_mach_o_uuid_command * 5769 bfd_mach_o_lookup_uuid_command (bfd *abfd) 5770 { 5771 bfd_mach_o_load_command *uuid_cmd = NULL; 5772 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd); 5773 if (ncmd != 1 || uuid_cmd == NULL) 5774 return FALSE; 5775 return &uuid_cmd->command.uuid; 5776 } 5777 5778 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */ 5779 5780 static bfd_boolean 5781 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd) 5782 { 5783 bfd_mach_o_uuid_command *dsym_uuid_cmd; 5784 5785 BFD_ASSERT (abfd); 5786 BFD_ASSERT (uuid_cmd); 5787 5788 if (!bfd_check_format (abfd, bfd_object)) 5789 return FALSE; 5790 5791 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour 5792 || bfd_mach_o_get_data (abfd) == NULL 5793 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM) 5794 return FALSE; 5795 5796 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5797 if (dsym_uuid_cmd == NULL) 5798 return FALSE; 5799 5800 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid, 5801 sizeof (uuid_cmd->uuid)) != 0) 5802 return FALSE; 5803 5804 return TRUE; 5805 } 5806 5807 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD. 5808 The caller is responsible for closing the returned BFD object and 5809 its my_archive if the returned BFD is in a fat dSYM. */ 5810 5811 static bfd * 5812 bfd_mach_o_find_dsym (const char *dsym_filename, 5813 const bfd_mach_o_uuid_command *uuid_cmd, 5814 const bfd_arch_info_type *arch) 5815 { 5816 bfd *base_dsym_bfd, *dsym_bfd; 5817 5818 BFD_ASSERT (uuid_cmd); 5819 5820 base_dsym_bfd = bfd_openr (dsym_filename, NULL); 5821 if (base_dsym_bfd == NULL) 5822 return NULL; 5823 5824 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch); 5825 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd)) 5826 return dsym_bfd; 5827 5828 bfd_close (dsym_bfd); 5829 if (base_dsym_bfd != dsym_bfd) 5830 bfd_close (base_dsym_bfd); 5831 5832 return NULL; 5833 } 5834 5835 /* Return a BFD created from a dSYM file for ABFD. 5836 The caller is responsible for closing the returned BFD object, its 5837 filename, and its my_archive if the returned BFD is in a fat dSYM. */ 5838 5839 static bfd * 5840 bfd_mach_o_follow_dsym (bfd *abfd) 5841 { 5842 char *dsym_filename; 5843 bfd_mach_o_uuid_command *uuid_cmd; 5844 bfd *dsym_bfd, *base_bfd = abfd; 5845 const char *base_basename; 5846 5847 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour) 5848 return NULL; 5849 5850 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive)) 5851 base_bfd = abfd->my_archive; 5852 /* BFD may have been opened from a stream. */ 5853 if (base_bfd->filename == NULL) 5854 { 5855 bfd_set_error (bfd_error_invalid_operation); 5856 return NULL; 5857 } 5858 base_basename = lbasename (base_bfd->filename); 5859 5860 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5861 if (uuid_cmd == NULL) 5862 return NULL; 5863 5864 /* TODO: We assume the DWARF file has the same as the binary's. 5865 It seems apple's GDB checks all files in the dSYM bundle directory. 5866 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c 5867 */ 5868 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename) 5869 + strlen (dsym_subdir) + 1 5870 + strlen (base_basename) + 1); 5871 sprintf (dsym_filename, "%s%s/%s", 5872 base_bfd->filename, dsym_subdir, base_basename); 5873 5874 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd, 5875 bfd_get_arch_info (abfd)); 5876 if (dsym_bfd == NULL) 5877 free (dsym_filename); 5878 5879 return dsym_bfd; 5880 } 5881 5882 bfd_boolean 5883 bfd_mach_o_find_nearest_line (bfd *abfd, 5884 asymbol **symbols, 5885 asection *section, 5886 bfd_vma offset, 5887 const char **filename_ptr, 5888 const char **functionname_ptr, 5889 unsigned int *line_ptr, 5890 unsigned int *discriminator_ptr) 5891 { 5892 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5893 if (mdata == NULL) 5894 return FALSE; 5895 switch (mdata->header.filetype) 5896 { 5897 case BFD_MACH_O_MH_OBJECT: 5898 break; 5899 case BFD_MACH_O_MH_EXECUTE: 5900 case BFD_MACH_O_MH_DYLIB: 5901 case BFD_MACH_O_MH_BUNDLE: 5902 case BFD_MACH_O_MH_KEXT_BUNDLE: 5903 if (mdata->dwarf2_find_line_info == NULL) 5904 { 5905 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd); 5906 /* When we couldn't find dSYM for this binary, we look for 5907 the debug information in the binary itself. In this way, 5908 we won't try finding separated dSYM again because 5909 mdata->dwarf2_find_line_info will be filled. */ 5910 if (! mdata->dsym_bfd) 5911 break; 5912 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd, 5913 dwarf_debug_sections, symbols, 5914 &mdata->dwarf2_find_line_info, 5915 FALSE)) 5916 return FALSE; 5917 } 5918 break; 5919 default: 5920 return FALSE; 5921 } 5922 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, 5923 filename_ptr, functionname_ptr, 5924 line_ptr, discriminator_ptr, 5925 dwarf_debug_sections, 0, 5926 &mdata->dwarf2_find_line_info); 5927 } 5928 5929 bfd_boolean 5930 bfd_mach_o_close_and_cleanup (bfd *abfd) 5931 { 5932 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5933 if (bfd_get_format (abfd) == bfd_object && mdata != NULL) 5934 { 5935 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info); 5936 bfd_mach_o_free_cached_info (abfd); 5937 if (mdata->dsym_bfd != NULL) 5938 { 5939 bfd *fat_bfd = mdata->dsym_bfd->my_archive; 5940 #if 0 5941 /* FIXME: PR 19435: This calculation to find the memory allocated by 5942 bfd_mach_o_follow_dsym for the filename does not always end up 5943 selecting the correct pointer. Unfortunately this problem is 5944 very hard to reproduce on a non Mach-O native system, so until it 5945 can be traced and fixed on such a system, this code will remain 5946 commented out. This does mean that there will be a memory leak, 5947 but it is small, and happens when we are closing down, so it 5948 should not matter too much. */ 5949 char *dsym_filename = (char *)(fat_bfd 5950 ? fat_bfd->filename 5951 : mdata->dsym_bfd->filename); 5952 #endif 5953 bfd_close (mdata->dsym_bfd); 5954 mdata->dsym_bfd = NULL; 5955 if (fat_bfd) 5956 bfd_close (fat_bfd); 5957 #if 0 5958 free (dsym_filename); 5959 #endif 5960 } 5961 } 5962 5963 return _bfd_generic_close_and_cleanup (abfd); 5964 } 5965 5966 bfd_boolean 5967 bfd_mach_o_free_cached_info (bfd *abfd) 5968 { 5969 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5970 asection *asect; 5971 free (mdata->dyn_reloc_cache); 5972 mdata->dyn_reloc_cache = NULL; 5973 for (asect = abfd->sections; asect != NULL; asect = asect->next) 5974 { 5975 free (asect->relocation); 5976 asect->relocation = NULL; 5977 } 5978 5979 return TRUE; 5980 } 5981 5982 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 5983 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup 5984 5985 #define bfd_mach_o_canonicalize_one_reloc NULL 5986 #define bfd_mach_o_swap_reloc_out NULL 5987 #define bfd_mach_o_print_thread NULL 5988 #define bfd_mach_o_tgt_seg_table NULL 5989 #define bfd_mach_o_section_type_valid_for_tgt NULL 5990 5991 #define TARGET_NAME mach_o_be_vec 5992 #define TARGET_STRING "mach-o-be" 5993 #define TARGET_ARCHITECTURE bfd_arch_unknown 5994 #define TARGET_PAGESIZE 1 5995 #define TARGET_BIG_ENDIAN 1 5996 #define TARGET_ARCHIVE 0 5997 #define TARGET_PRIORITY 1 5998 #include "mach-o-target.c" 5999 6000 #undef TARGET_NAME 6001 #undef TARGET_STRING 6002 #undef TARGET_ARCHITECTURE 6003 #undef TARGET_PAGESIZE 6004 #undef TARGET_BIG_ENDIAN 6005 #undef TARGET_ARCHIVE 6006 #undef TARGET_PRIORITY 6007 6008 #define TARGET_NAME mach_o_le_vec 6009 #define TARGET_STRING "mach-o-le" 6010 #define TARGET_ARCHITECTURE bfd_arch_unknown 6011 #define TARGET_PAGESIZE 1 6012 #define TARGET_BIG_ENDIAN 0 6013 #define TARGET_ARCHIVE 0 6014 #define TARGET_PRIORITY 1 6015 6016 #include "mach-o-target.c" 6017 6018 #undef TARGET_NAME 6019 #undef TARGET_STRING 6020 #undef TARGET_ARCHITECTURE 6021 #undef TARGET_PAGESIZE 6022 #undef TARGET_BIG_ENDIAN 6023 #undef TARGET_ARCHIVE 6024 #undef TARGET_PRIORITY 6025 6026 /* Not yet handled: creating an archive. */ 6027 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive 6028 6029 #define bfd_mach_o_close_and_cleanup _bfd_bool_bfd_true 6030 6031 /* Not used. */ 6032 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt 6033 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file 6034 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p 6035 6036 #define TARGET_NAME mach_o_fat_vec 6037 #define TARGET_STRING "mach-o-fat" 6038 #define TARGET_ARCHITECTURE bfd_arch_unknown 6039 #define TARGET_PAGESIZE 1 6040 #define TARGET_BIG_ENDIAN 1 6041 #define TARGET_ARCHIVE 1 6042 #define TARGET_PRIORITY 0 6043 6044 #include "mach-o-target.c" 6045 6046 #undef TARGET_NAME 6047 #undef TARGET_STRING 6048 #undef TARGET_ARCHITECTURE 6049 #undef TARGET_PAGESIZE 6050 #undef TARGET_BIG_ENDIAN 6051 #undef TARGET_ARCHIVE 6052 #undef TARGET_PRIORITY 6053