1 /* Mach-O support for BFD. 2 Copyright (C) 1999-2019 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 "bfd.h" 23 #include "libbfd.h" 24 #include "libiberty.h" 25 #include "mach-o.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 2502 /* Update external symbol bit in case objcopy changed it. */ 2503 if (s->symbol.flags & BSF_GLOBAL) 2504 s->n_type |= BFD_MACH_O_N_EXT; 2505 else 2506 s->n_type &= ~BFD_MACH_O_N_EXT; 2507 2508 /* Put the section index in, where required. */ 2509 if ((s->symbol.section != bfd_abs_section_ptr 2510 && s->symbol.section != bfd_und_section_ptr 2511 && s->symbol.section != bfd_com_section_ptr) 2512 || ((s->n_type & BFD_MACH_O_N_STAB) != 0 2513 && s->symbol.name == NULL)) 2514 s->n_sect = s->symbol.section->output_section->target_index; 2515 2516 /* Number to preserve order for local and debug syms. */ 2517 s->symbol.udata.i = i; 2518 } 2519 2520 /* Sort the symbols. */ 2521 qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd), 2522 sizeof (asymbol *), bfd_mach_o_cf_symbols); 2523 2524 for (i = 0; i < bfd_get_symcount (abfd); ++i) 2525 { 2526 bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; 2527 s->symbol.udata.i = i; /* renumber. */ 2528 } 2529 2530 return TRUE; 2531 } 2532 2533 /* We build a flat table of sections, which can be re-ordered if necessary. 2534 Fill in the section number and other mach-o-specific data. */ 2535 2536 static bfd_boolean 2537 bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata) 2538 { 2539 asection *sec; 2540 unsigned target_index; 2541 unsigned nsect; 2542 2543 nsect = bfd_count_sections (abfd); 2544 2545 /* Don't do it if it's already set - assume the application knows what it's 2546 doing. */ 2547 if (mdata->nsects == nsect 2548 && (mdata->nsects == 0 || mdata->sections != NULL)) 2549 return TRUE; 2550 2551 /* We need to check that this can be done... */ 2552 if (nsect > 255) 2553 { 2554 _bfd_error_handler (_("mach-o: there are too many sections (%u)" 2555 " maximum is 255,\n"), nsect); 2556 return FALSE; 2557 } 2558 2559 mdata->nsects = nsect; 2560 mdata->sections = bfd_alloc2 (abfd, 2561 mdata->nsects, sizeof (bfd_mach_o_section *)); 2562 if (mdata->sections == NULL) 2563 return FALSE; 2564 2565 /* Create Mach-O sections. 2566 Section type, attribute and align should have been set when the 2567 section was created - either read in or specified. */ 2568 target_index = 0; 2569 for (sec = abfd->sections; sec; sec = sec->next) 2570 { 2571 unsigned bfd_align = bfd_get_section_alignment (abfd, sec); 2572 bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec); 2573 2574 mdata->sections[target_index] = msect; 2575 2576 msect->addr = bfd_get_section_vma (abfd, sec); 2577 msect->size = bfd_get_section_size (sec); 2578 2579 /* Use the largest alignment set, in case it was bumped after the 2580 section was created. */ 2581 msect->align = msect->align > bfd_align ? msect->align : bfd_align; 2582 2583 msect->offset = 0; 2584 sec->target_index = ++target_index; 2585 } 2586 2587 return TRUE; 2588 } 2589 2590 bfd_boolean 2591 bfd_mach_o_write_contents (bfd *abfd) 2592 { 2593 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2594 bfd_mach_o_load_command *cmd; 2595 bfd_mach_o_symtab_command *symtab = NULL; 2596 bfd_mach_o_dysymtab_command *dysymtab = NULL; 2597 bfd_mach_o_segment_command *linkedit = NULL; 2598 2599 /* Make the commands, if not already present. */ 2600 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 2601 return FALSE; 2602 abfd->output_has_begun = TRUE; 2603 2604 /* Write the header. */ 2605 if (!bfd_mach_o_write_header (abfd, &mdata->header)) 2606 return FALSE; 2607 2608 /* First pass: allocate the linkedit segment. */ 2609 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2610 switch (cmd->type) 2611 { 2612 case BFD_MACH_O_LC_SEGMENT_64: 2613 case BFD_MACH_O_LC_SEGMENT: 2614 if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0) 2615 linkedit = &cmd->command.segment; 2616 break; 2617 case BFD_MACH_O_LC_SYMTAB: 2618 symtab = &cmd->command.symtab; 2619 break; 2620 case BFD_MACH_O_LC_DYSYMTAB: 2621 dysymtab = &cmd->command.dysymtab; 2622 break; 2623 case BFD_MACH_O_LC_DYLD_INFO: 2624 { 2625 bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info; 2626 2627 if (di->rebase_size != 0) 2628 { 2629 di->rebase_off = mdata->filelen; 2630 mdata->filelen += di->rebase_size; 2631 } 2632 if (di->bind_size != 0) 2633 { 2634 di->bind_off = mdata->filelen; 2635 mdata->filelen += di->bind_size; 2636 } 2637 if (di->weak_bind_size != 0) 2638 { 2639 di->weak_bind_off = mdata->filelen; 2640 mdata->filelen += di->weak_bind_size; 2641 } 2642 if (di->lazy_bind_size != 0) 2643 { 2644 di->lazy_bind_off = mdata->filelen; 2645 mdata->filelen += di->lazy_bind_size; 2646 } 2647 if (di->export_size != 0) 2648 { 2649 di->export_off = mdata->filelen; 2650 mdata->filelen += di->export_size; 2651 } 2652 } 2653 break; 2654 case BFD_MACH_O_LC_LOAD_DYLIB: 2655 case BFD_MACH_O_LC_LOAD_DYLINKER: 2656 case BFD_MACH_O_LC_MAIN: 2657 /* Nothing to do. */ 2658 break; 2659 default: 2660 _bfd_error_handler 2661 (_("unable to allocate data for load command %#x"), 2662 cmd->type); 2663 break; 2664 } 2665 2666 /* Specially handle symtab and dysymtab. */ 2667 2668 /* Pre-allocate the symbol table (but not the string table). The reason 2669 is that the dysymtab is after the symbol table but before the string 2670 table (required by the native strip tool). */ 2671 if (symtab != NULL) 2672 { 2673 unsigned int symlen; 2674 unsigned int wide = bfd_mach_o_wide_p (abfd); 2675 2676 symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 2677 2678 /* Align for symbols. */ 2679 mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2); 2680 symtab->symoff = mdata->filelen; 2681 2682 symtab->nsyms = bfd_get_symcount (abfd); 2683 mdata->filelen += symtab->nsyms * symlen; 2684 } 2685 2686 /* Build the dysymtab. */ 2687 if (dysymtab != NULL) 2688 if (!bfd_mach_o_build_dysymtab (abfd, dysymtab)) 2689 return FALSE; 2690 2691 /* Write symtab and strtab. */ 2692 if (symtab != NULL) 2693 if (!bfd_mach_o_write_symtab_content (abfd, symtab)) 2694 return FALSE; 2695 2696 /* Adjust linkedit size. */ 2697 if (linkedit != NULL) 2698 { 2699 /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */ 2700 2701 linkedit->vmsize = mdata->filelen - linkedit->fileoff; 2702 /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */ 2703 linkedit->filesize = mdata->filelen - linkedit->fileoff; 2704 2705 linkedit->initprot = BFD_MACH_O_PROT_READ; 2706 linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2707 | BFD_MACH_O_PROT_EXECUTE; 2708 } 2709 2710 /* Second pass: write commands. */ 2711 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 2712 { 2713 struct mach_o_load_command_external raw; 2714 unsigned long typeflag; 2715 2716 typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0); 2717 2718 bfd_h_put_32 (abfd, typeflag, raw.cmd); 2719 bfd_h_put_32 (abfd, cmd->len, raw.cmdsize); 2720 2721 if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0 2722 || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8) 2723 return FALSE; 2724 2725 switch (cmd->type) 2726 { 2727 case BFD_MACH_O_LC_SEGMENT: 2728 if (!bfd_mach_o_write_segment_32 (abfd, cmd)) 2729 return FALSE; 2730 break; 2731 case BFD_MACH_O_LC_SEGMENT_64: 2732 if (!bfd_mach_o_write_segment_64 (abfd, cmd)) 2733 return FALSE; 2734 break; 2735 case BFD_MACH_O_LC_SYMTAB: 2736 if (!bfd_mach_o_write_symtab (abfd, cmd)) 2737 return FALSE; 2738 break; 2739 case BFD_MACH_O_LC_DYSYMTAB: 2740 if (!bfd_mach_o_write_dysymtab (abfd, cmd)) 2741 return FALSE; 2742 break; 2743 case BFD_MACH_O_LC_THREAD: 2744 case BFD_MACH_O_LC_UNIXTHREAD: 2745 if (!bfd_mach_o_write_thread (abfd, cmd)) 2746 return FALSE; 2747 break; 2748 case BFD_MACH_O_LC_LOAD_DYLIB: 2749 if (!bfd_mach_o_write_dylib (abfd, cmd)) 2750 return FALSE; 2751 break; 2752 case BFD_MACH_O_LC_LOAD_DYLINKER: 2753 if (!bfd_mach_o_write_dylinker (abfd, cmd)) 2754 return FALSE; 2755 break; 2756 case BFD_MACH_O_LC_MAIN: 2757 if (!bfd_mach_o_write_main (abfd, cmd)) 2758 return FALSE; 2759 break; 2760 case BFD_MACH_O_LC_DYLD_INFO: 2761 if (!bfd_mach_o_write_dyld_info (abfd, cmd)) 2762 return FALSE; 2763 break; 2764 default: 2765 _bfd_error_handler 2766 (_("unable to write unknown load command %#x"), 2767 cmd->type); 2768 return FALSE; 2769 } 2770 } 2771 2772 return TRUE; 2773 } 2774 2775 static void 2776 bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg, 2777 bfd_mach_o_section *s) 2778 { 2779 if (seg->sect_head == NULL) 2780 seg->sect_head = s; 2781 else 2782 seg->sect_tail->next = s; 2783 seg->sect_tail = s; 2784 } 2785 2786 /* Create section Mach-O flags from BFD flags. */ 2787 2788 static void 2789 bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, 2790 asection *sec) 2791 { 2792 flagword bfd_flags; 2793 bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec); 2794 2795 /* Create default flags. */ 2796 bfd_flags = bfd_get_section_flags (abfd, sec); 2797 if ((bfd_flags & SEC_CODE) == SEC_CODE) 2798 s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS 2799 | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 2800 | BFD_MACH_O_S_REGULAR; 2801 else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC) 2802 s->flags = BFD_MACH_O_S_ZEROFILL; 2803 else if (bfd_flags & SEC_DEBUGGING) 2804 s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG; 2805 else 2806 s->flags = BFD_MACH_O_S_REGULAR; 2807 } 2808 2809 static bfd_boolean 2810 bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2811 { 2812 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2813 unsigned int i, j; 2814 2815 seg->vmaddr = 0; 2816 seg->fileoff = mdata->filelen; 2817 seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 2818 | BFD_MACH_O_PROT_EXECUTE; 2819 seg->maxprot = seg->initprot; 2820 2821 /* Append sections to the segment. 2822 2823 This is a little tedious, we have to honor the need to account zerofill 2824 sections after all the rest. This forces us to do the calculation of 2825 total vmsize in three passes so that any alignment increments are 2826 properly accounted. */ 2827 for (i = 0; i < mdata->nsects; ++i) 2828 { 2829 bfd_mach_o_section *s = mdata->sections[i]; 2830 asection *sec = s->bfdsection; 2831 2832 /* Although we account for zerofill section sizes in vm order, they are 2833 placed in the file in source sequence. */ 2834 bfd_mach_o_append_section_to_segment (seg, s); 2835 s->offset = 0; 2836 2837 /* Zerofill sections have zero file size & offset, the only content 2838 written to the file is the symbols. */ 2839 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL 2840 || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2841 == BFD_MACH_O_S_GB_ZEROFILL)) 2842 continue; 2843 2844 /* The Darwin system tools (in MH_OBJECT files, at least) always account 2845 sections, even those with zero size. */ 2846 if (s->size > 0) 2847 { 2848 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2849 seg->vmsize += s->size; 2850 2851 /* MH_OBJECT files have unaligned content. */ 2852 if (1) 2853 { 2854 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2855 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2856 } 2857 seg->filesize += s->size; 2858 2859 /* The system tools write even zero-sized sections with an offset 2860 field set to the current file position. */ 2861 s->offset = mdata->filelen; 2862 } 2863 2864 sec->filepos = s->offset; 2865 mdata->filelen += s->size; 2866 } 2867 2868 /* Now pass through again, for zerofill, only now we just update the 2869 vmsize, and then for zerofill_GB. */ 2870 for (j = 0; j < 2; j++) 2871 { 2872 unsigned int stype; 2873 2874 if (j == 0) 2875 stype = BFD_MACH_O_S_ZEROFILL; 2876 else 2877 stype = BFD_MACH_O_S_GB_ZEROFILL; 2878 2879 for (i = 0; i < mdata->nsects; ++i) 2880 { 2881 bfd_mach_o_section *s = mdata->sections[i]; 2882 2883 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype) 2884 continue; 2885 2886 if (s->size > 0) 2887 { 2888 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2889 seg->vmsize += s->size; 2890 } 2891 } 2892 } 2893 2894 /* Allocate space for the relocations. */ 2895 mdata->filelen = FILE_ALIGN (mdata->filelen, 2); 2896 2897 for (i = 0; i < mdata->nsects; ++i) 2898 { 2899 bfd_mach_o_section *ms = mdata->sections[i]; 2900 asection *sec = ms->bfdsection; 2901 2902 ms->nreloc = sec->reloc_count; 2903 if (ms->nreloc == 0) 2904 { 2905 /* Clear nreloc and reloff if there is no relocs. */ 2906 ms->reloff = 0; 2907 continue; 2908 } 2909 sec->rel_filepos = mdata->filelen; 2910 ms->reloff = sec->rel_filepos; 2911 mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE; 2912 } 2913 2914 return TRUE; 2915 } 2916 2917 static bfd_boolean 2918 bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) 2919 { 2920 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 2921 unsigned int i; 2922 bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; 2923 bfd_vma vma; 2924 bfd_mach_o_section *s; 2925 2926 seg->vmsize = 0; 2927 2928 seg->fileoff = mdata->filelen; 2929 seg->maxprot = 0; 2930 seg->initprot = 0; 2931 seg->flags = 0; 2932 2933 /* Append sections to the segment. We assume they are properly ordered 2934 by vma (but we check that). */ 2935 vma = 0; 2936 for (i = 0; i < mdata->nsects; ++i) 2937 { 2938 s = mdata->sections[i]; 2939 2940 /* Consider only sections for this segment. */ 2941 if (strcmp (seg->segname, s->segname) != 0) 2942 continue; 2943 2944 bfd_mach_o_append_section_to_segment (seg, s); 2945 2946 if (s->addr < vma) 2947 { 2948 _bfd_error_handler 2949 /* xgettext:c-format */ 2950 (_("section address (%#" PRIx64 ") " 2951 "below start of segment (%#" PRIx64 ")"), 2952 (uint64_t) s->addr, (uint64_t) vma); 2953 return FALSE; 2954 } 2955 2956 vma = s->addr + s->size; 2957 } 2958 2959 /* Set segment file offset: make it page aligned. */ 2960 vma = seg->sect_head->addr; 2961 seg->vmaddr = vma & ~pagemask; 2962 if ((mdata->filelen & pagemask) > (vma & pagemask)) 2963 mdata->filelen += pagemask + 1; 2964 seg->fileoff = mdata->filelen & ~pagemask; 2965 mdata->filelen = seg->fileoff + (vma & pagemask); 2966 2967 /* Set section file offset. */ 2968 for (s = seg->sect_head; s != NULL; s = s->next) 2969 { 2970 asection *sec = s->bfdsection; 2971 flagword flags = bfd_get_section_flags (abfd, sec); 2972 2973 /* Adjust segment size. */ 2974 seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); 2975 seg->vmsize += s->size; 2976 2977 /* File offset and length. */ 2978 seg->filesize = FILE_ALIGN (seg->filesize, s->align); 2979 2980 if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL 2981 && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) 2982 != BFD_MACH_O_S_GB_ZEROFILL)) 2983 { 2984 mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); 2985 2986 s->offset = mdata->filelen; 2987 s->bfdsection->filepos = s->offset; 2988 2989 seg->filesize += s->size; 2990 mdata->filelen += s->size; 2991 } 2992 else 2993 { 2994 s->offset = 0; 2995 s->bfdsection->filepos = 0; 2996 } 2997 2998 /* Set protection. */ 2999 if (flags & SEC_LOAD) 3000 { 3001 if (flags & SEC_CODE) 3002 seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE; 3003 if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA) 3004 seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ; 3005 } 3006 3007 /* Relocs shouldn't appear in non-object files. */ 3008 if (s->bfdsection->reloc_count != 0) 3009 return FALSE; 3010 } 3011 3012 /* Set maxprot. */ 3013 if (seg->initprot != 0) 3014 seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE 3015 | BFD_MACH_O_PROT_EXECUTE; 3016 else 3017 seg->maxprot = 0; 3018 3019 /* Round segment size (and file size). */ 3020 seg->vmsize = (seg->vmsize + pagemask) & ~pagemask; 3021 seg->filesize = (seg->filesize + pagemask) & ~pagemask; 3022 mdata->filelen = (mdata->filelen + pagemask) & ~pagemask; 3023 3024 return TRUE; 3025 } 3026 3027 /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds 3028 fields in header. */ 3029 3030 static bfd_boolean 3031 bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata) 3032 { 3033 unsigned wide = mach_o_wide_p (&mdata->header); 3034 unsigned int hdrlen; 3035 ufile_ptr offset; 3036 bfd_mach_o_load_command *cmd; 3037 unsigned int align; 3038 bfd_boolean ret = TRUE; 3039 3040 hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3041 align = wide ? 8 - 1 : 4 - 1; 3042 offset = hdrlen; 3043 mdata->header.ncmds = 0; 3044 3045 for (cmd = mdata->first_command; cmd; cmd = cmd->next) 3046 { 3047 mdata->header.ncmds++; 3048 cmd->offset = offset; 3049 3050 switch (cmd->type) 3051 { 3052 case BFD_MACH_O_LC_SEGMENT_64: 3053 cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE 3054 + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects; 3055 break; 3056 case BFD_MACH_O_LC_SEGMENT: 3057 cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE 3058 + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects; 3059 break; 3060 case BFD_MACH_O_LC_SYMTAB: 3061 cmd->len = sizeof (struct mach_o_symtab_command_external) 3062 + BFD_MACH_O_LC_SIZE; 3063 break; 3064 case BFD_MACH_O_LC_DYSYMTAB: 3065 cmd->len = sizeof (struct mach_o_dysymtab_command_external) 3066 + BFD_MACH_O_LC_SIZE; 3067 break; 3068 case BFD_MACH_O_LC_LOAD_DYLIB: 3069 cmd->len = sizeof (struct mach_o_dylib_command_external) 3070 + BFD_MACH_O_LC_SIZE; 3071 cmd->command.dylib.name_offset = cmd->len; 3072 cmd->len += strlen (cmd->command.dylib.name_str); 3073 cmd->len = (cmd->len + align) & ~align; 3074 break; 3075 case BFD_MACH_O_LC_LOAD_DYLINKER: 3076 cmd->len = sizeof (struct mach_o_str_command_external) 3077 + BFD_MACH_O_LC_SIZE; 3078 cmd->command.dylinker.name_offset = cmd->len; 3079 cmd->len += strlen (cmd->command.dylinker.name_str); 3080 cmd->len = (cmd->len + align) & ~align; 3081 break; 3082 case BFD_MACH_O_LC_MAIN: 3083 cmd->len = sizeof (struct mach_o_entry_point_command_external) 3084 + BFD_MACH_O_LC_SIZE; 3085 break; 3086 case BFD_MACH_O_LC_DYLD_INFO: 3087 cmd->len = sizeof (struct mach_o_dyld_info_command_external) 3088 + BFD_MACH_O_LC_SIZE; 3089 break; 3090 default: 3091 _bfd_error_handler 3092 (_("unable to layout unknown load command %#x"), 3093 cmd->type); 3094 ret = FALSE; 3095 break; 3096 } 3097 3098 BFD_ASSERT (cmd->len % (align + 1) == 0); 3099 offset += cmd->len; 3100 } 3101 mdata->header.sizeofcmds = offset - hdrlen; 3102 mdata->filelen = offset; 3103 3104 return ret; 3105 } 3106 3107 /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a 3108 segment. */ 3109 3110 static void 3111 bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata, 3112 bfd_mach_o_load_command *cmd, 3113 const char *segname, unsigned int nbr_sect) 3114 { 3115 bfd_mach_o_segment_command *seg = &cmd->command.segment; 3116 unsigned wide = mach_o_wide_p (&mdata->header); 3117 3118 /* Init segment command. */ 3119 cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT; 3120 cmd->type_required = FALSE; 3121 3122 strcpy (seg->segname, segname); 3123 seg->nsects = nbr_sect; 3124 3125 seg->vmaddr = 0; 3126 seg->vmsize = 0; 3127 3128 seg->fileoff = 0; 3129 seg->filesize = 0; 3130 seg->maxprot = 0; 3131 seg->initprot = 0; 3132 seg->flags = 0; 3133 seg->sect_head = NULL; 3134 seg->sect_tail = NULL; 3135 } 3136 3137 /* Build Mach-O load commands (currently assuming an MH_OBJECT file). 3138 TODO: Other file formats, rebuilding symtab/dysymtab commands for strip 3139 and copy functionality. */ 3140 3141 bfd_boolean 3142 bfd_mach_o_build_commands (bfd *abfd) 3143 { 3144 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3145 unsigned wide = mach_o_wide_p (&mdata->header); 3146 unsigned int nbr_segcmd = 0; 3147 bfd_mach_o_load_command *commands; 3148 unsigned int nbr_commands; 3149 int symtab_idx = -1; 3150 int dysymtab_idx = -1; 3151 int main_idx = -1; 3152 unsigned int i; 3153 3154 /* Return now if already built. */ 3155 if (mdata->header.ncmds != 0) 3156 return TRUE; 3157 3158 /* Fill in the file type, if not already set. */ 3159 if (mdata->header.filetype == 0) 3160 { 3161 if (abfd->flags & EXEC_P) 3162 mdata->header.filetype = BFD_MACH_O_MH_EXECUTE; 3163 else if (abfd->flags & DYNAMIC) 3164 mdata->header.filetype = BFD_MACH_O_MH_DYLIB; 3165 else 3166 mdata->header.filetype = BFD_MACH_O_MH_OBJECT; 3167 } 3168 3169 /* If hasn't already been done, flatten sections list, and sort 3170 if/when required. Must be done before the symbol table is adjusted, 3171 since that depends on properly numbered sections. */ 3172 if (mdata->nsects == 0 || mdata->sections == NULL) 3173 if (! bfd_mach_o_mangle_sections (abfd, mdata)) 3174 return FALSE; 3175 3176 /* Order the symbol table, fill-in/check mach-o specific fields and 3177 partition out any indirect symbols. */ 3178 if (!bfd_mach_o_mangle_symbols (abfd)) 3179 return FALSE; 3180 3181 /* Segment commands. */ 3182 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3183 { 3184 /* Only one segment for all the sections. But the segment is 3185 optional if there is no sections. */ 3186 nbr_segcmd = (mdata->nsects > 0) ? 1 : 0; 3187 } 3188 else 3189 { 3190 bfd_mach_o_section *prev_sect = NULL; 3191 3192 /* One pagezero segment and one linkedit segment. */ 3193 nbr_segcmd = 2; 3194 3195 /* Create one segment for associated segment name in sections. 3196 Assume that sections with the same segment name are consecutive. */ 3197 for (i = 0; i < mdata->nsects; i++) 3198 { 3199 bfd_mach_o_section *this_sect = mdata->sections[i]; 3200 3201 if (prev_sect == NULL 3202 || strcmp (prev_sect->segname, this_sect->segname) != 0) 3203 { 3204 nbr_segcmd++; 3205 prev_sect = this_sect; 3206 } 3207 } 3208 } 3209 3210 nbr_commands = nbr_segcmd; 3211 3212 /* One command for the symbol table (only if there are symbols. */ 3213 if (bfd_get_symcount (abfd) > 0) 3214 symtab_idx = nbr_commands++; 3215 3216 /* FIXME: 3217 This is a rather crude test for whether we should build a dysymtab. */ 3218 if (bfd_mach_o_should_emit_dysymtab () 3219 && bfd_get_symcount (abfd)) 3220 { 3221 /* If there should be a case where a dysymtab could be emitted without 3222 a symtab (seems improbable), this would need amending. */ 3223 dysymtab_idx = nbr_commands++; 3224 } 3225 3226 /* Add an entry point command. */ 3227 if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE 3228 && bfd_get_start_address (abfd) != 0) 3229 main_idx = nbr_commands++; 3230 3231 /* Well, we must have a header, at least. */ 3232 mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3233 3234 /* A bit unusual, but no content is valid; 3235 as -n empty.s -o empty.o */ 3236 if (nbr_commands == 0) 3237 { 3238 /* Layout commands (well none...) and set headers command fields. */ 3239 return bfd_mach_o_layout_commands (mdata); 3240 } 3241 3242 /* Create commands for segments (and symtabs), prepend them. */ 3243 commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command)); 3244 if (commands == NULL) 3245 return FALSE; 3246 for (i = 0; i < nbr_commands - 1; i++) 3247 commands[i].next = &commands[i + 1]; 3248 commands[nbr_commands - 1].next = mdata->first_command; 3249 if (mdata->first_command == NULL) 3250 mdata->last_command = &commands[nbr_commands - 1]; 3251 mdata->first_command = &commands[0]; 3252 3253 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0) 3254 { 3255 /* For object file, there is only one segment. */ 3256 bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects); 3257 } 3258 else if (nbr_segcmd != 0) 3259 { 3260 bfd_mach_o_load_command *cmd; 3261 3262 BFD_ASSERT (nbr_segcmd >= 2); 3263 3264 /* The pagezero. */ 3265 cmd = &commands[0]; 3266 bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0); 3267 3268 /* Segments from sections. */ 3269 cmd++; 3270 for (i = 0; i < mdata->nsects;) 3271 { 3272 const char *segname = mdata->sections[i]->segname; 3273 unsigned int nbr_sect = 1; 3274 3275 /* Count number of sections for this segment. */ 3276 for (i++; i < mdata->nsects; i++) 3277 if (strcmp (mdata->sections[i]->segname, segname) == 0) 3278 nbr_sect++; 3279 else 3280 break; 3281 3282 bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect); 3283 cmd++; 3284 } 3285 3286 /* The linkedit. */ 3287 bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0); 3288 } 3289 3290 if (symtab_idx >= 0) 3291 { 3292 /* Init symtab command. */ 3293 bfd_mach_o_load_command *cmd = &commands[symtab_idx]; 3294 3295 cmd->type = BFD_MACH_O_LC_SYMTAB; 3296 cmd->type_required = FALSE; 3297 } 3298 3299 /* If required, setup symtab command, see comment above about the quality 3300 of this test. */ 3301 if (dysymtab_idx >= 0) 3302 { 3303 bfd_mach_o_load_command *cmd = &commands[dysymtab_idx]; 3304 3305 cmd->type = BFD_MACH_O_LC_DYSYMTAB; 3306 cmd->type_required = FALSE; 3307 } 3308 3309 /* Create the main command. */ 3310 if (main_idx >= 0) 3311 { 3312 bfd_mach_o_load_command *cmd = &commands[main_idx]; 3313 3314 cmd->type = BFD_MACH_O_LC_MAIN; 3315 cmd->type_required = TRUE; 3316 3317 cmd->command.main.entryoff = 0; 3318 cmd->command.main.stacksize = 0; 3319 } 3320 3321 /* Layout commands. */ 3322 if (! bfd_mach_o_layout_commands (mdata)) 3323 return FALSE; 3324 3325 /* So, now we have sized the commands and the filelen set to that. 3326 Now we can build the segment command and set the section file offsets. */ 3327 if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) 3328 { 3329 for (i = 0; i < nbr_segcmd; i++) 3330 if (!bfd_mach_o_build_obj_seg_command 3331 (abfd, &commands[i].command.segment)) 3332 return FALSE; 3333 } 3334 else 3335 { 3336 bfd_vma maxvma = 0; 3337 3338 /* Skip pagezero and linkedit segments. */ 3339 for (i = 1; i < nbr_segcmd - 1; i++) 3340 { 3341 bfd_mach_o_segment_command *seg = &commands[i].command.segment; 3342 3343 if (!bfd_mach_o_build_exec_seg_command (abfd, seg)) 3344 return FALSE; 3345 3346 if (seg->vmaddr + seg->vmsize > maxvma) 3347 maxvma = seg->vmaddr + seg->vmsize; 3348 } 3349 3350 /* Set the size of __PAGEZERO. */ 3351 commands[0].command.segment.vmsize = 3352 commands[1].command.segment.vmaddr; 3353 3354 /* Set the vma and fileoff of __LINKEDIT. */ 3355 commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma; 3356 commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen; 3357 3358 /* Set entry point (once segments have been laid out). */ 3359 if (main_idx >= 0) 3360 commands[main_idx].command.main.entryoff = 3361 bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr; 3362 } 3363 3364 return TRUE; 3365 } 3366 3367 /* Set the contents of a section. */ 3368 3369 bfd_boolean 3370 bfd_mach_o_set_section_contents (bfd *abfd, 3371 asection *section, 3372 const void * location, 3373 file_ptr offset, 3374 bfd_size_type count) 3375 { 3376 file_ptr pos; 3377 3378 /* Trying to write the first section contents will trigger the creation of 3379 the load commands if they are not already present. */ 3380 if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) 3381 return FALSE; 3382 3383 if (count == 0) 3384 return TRUE; 3385 3386 pos = section->filepos + offset; 3387 if (bfd_seek (abfd, pos, SEEK_SET) != 0 3388 || bfd_bwrite (location, count, abfd) != count) 3389 return FALSE; 3390 3391 return TRUE; 3392 } 3393 3394 int 3395 bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, 3396 struct bfd_link_info *info ATTRIBUTE_UNUSED) 3397 { 3398 return 0; 3399 } 3400 3401 /* Make an empty symbol. This is required only because 3402 bfd_make_section_anyway wants to create a symbol for the section. */ 3403 3404 asymbol * 3405 bfd_mach_o_make_empty_symbol (bfd *abfd) 3406 { 3407 asymbol *new_symbol; 3408 3409 new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol)); 3410 if (new_symbol == NULL) 3411 return new_symbol; 3412 new_symbol->the_bfd = abfd; 3413 new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET; 3414 return new_symbol; 3415 } 3416 3417 static bfd_boolean 3418 bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header) 3419 { 3420 struct mach_o_header_external raw; 3421 unsigned int size; 3422 bfd_vma (*get32) (const void *) = NULL; 3423 3424 /* Just read the magic number. */ 3425 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3426 || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4) 3427 return FALSE; 3428 3429 if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3430 { 3431 header->byteorder = BFD_ENDIAN_BIG; 3432 header->magic = BFD_MACH_O_MH_MAGIC; 3433 header->version = 1; 3434 get32 = bfd_getb32; 3435 } 3436 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC) 3437 { 3438 header->byteorder = BFD_ENDIAN_LITTLE; 3439 header->magic = BFD_MACH_O_MH_MAGIC; 3440 header->version = 1; 3441 get32 = bfd_getl32; 3442 } 3443 else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3444 { 3445 header->byteorder = BFD_ENDIAN_BIG; 3446 header->magic = BFD_MACH_O_MH_MAGIC_64; 3447 header->version = 2; 3448 get32 = bfd_getb32; 3449 } 3450 else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) 3451 { 3452 header->byteorder = BFD_ENDIAN_LITTLE; 3453 header->magic = BFD_MACH_O_MH_MAGIC_64; 3454 header->version = 2; 3455 get32 = bfd_getl32; 3456 } 3457 else 3458 { 3459 header->byteorder = BFD_ENDIAN_UNKNOWN; 3460 return FALSE; 3461 } 3462 3463 /* Once the size of the header is known, read the full header. */ 3464 size = mach_o_wide_p (header) ? 3465 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 3466 3467 if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 3468 || bfd_bread (&raw, size, abfd) != size) 3469 return FALSE; 3470 3471 header->cputype = (*get32) (raw.cputype); 3472 header->cpusubtype = (*get32) (raw.cpusubtype); 3473 header->filetype = (*get32) (raw.filetype); 3474 header->ncmds = (*get32) (raw.ncmds); 3475 header->sizeofcmds = (*get32) (raw.sizeofcmds); 3476 header->flags = (*get32) (raw.flags); 3477 3478 if (mach_o_wide_p (header)) 3479 header->reserved = (*get32) (raw.reserved); 3480 else 3481 header->reserved = 0; 3482 3483 return TRUE; 3484 } 3485 3486 bfd_boolean 3487 bfd_mach_o_new_section_hook (bfd *abfd, asection *sec) 3488 { 3489 bfd_mach_o_section *s; 3490 unsigned bfdalign = bfd_get_section_alignment (abfd, sec); 3491 3492 s = bfd_mach_o_get_mach_o_section (sec); 3493 if (s == NULL) 3494 { 3495 flagword bfd_flags; 3496 static const mach_o_section_name_xlat * xlat; 3497 3498 s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s)); 3499 if (s == NULL) 3500 return FALSE; 3501 sec->used_by_bfd = s; 3502 s->bfdsection = sec; 3503 3504 /* Create the Darwin seg/sect name pair from the bfd name. 3505 If this is a canonical name for which a specific paiting exists 3506 there will also be defined flags, type, attribute and alignment 3507 values. */ 3508 xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s); 3509 if (xlat != NULL) 3510 { 3511 s->flags = xlat->macho_sectype | xlat->macho_secattr; 3512 s->align = xlat->sectalign > bfdalign ? xlat->sectalign 3513 : bfdalign; 3514 (void) bfd_set_section_alignment (abfd, sec, s->align); 3515 bfd_flags = bfd_get_section_flags (abfd, sec); 3516 if (bfd_flags == SEC_NO_FLAGS) 3517 bfd_set_section_flags (abfd, sec, xlat->bfd_flags); 3518 } 3519 else 3520 /* Create default flags. */ 3521 bfd_mach_o_set_section_flags_from_bfd (abfd, sec); 3522 } 3523 3524 return _bfd_generic_new_section_hook (abfd, sec); 3525 } 3526 3527 static void 3528 bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec, 3529 unsigned long prot) 3530 { 3531 flagword flags; 3532 bfd_mach_o_section *section; 3533 3534 flags = bfd_get_section_flags (abfd, sec); 3535 section = bfd_mach_o_get_mach_o_section (sec); 3536 3537 /* TODO: see if we should use the xlat system for doing this by 3538 preference and fall back to this for unknown sections. */ 3539 3540 if (flags == SEC_NO_FLAGS) 3541 { 3542 /* Try to guess flags. */ 3543 if (section->flags & BFD_MACH_O_S_ATTR_DEBUG) 3544 flags = SEC_DEBUGGING; 3545 else 3546 { 3547 flags = SEC_ALLOC; 3548 if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK) 3549 != BFD_MACH_O_S_ZEROFILL) 3550 { 3551 flags |= SEC_LOAD; 3552 if (prot & BFD_MACH_O_PROT_EXECUTE) 3553 flags |= SEC_CODE; 3554 if (prot & BFD_MACH_O_PROT_WRITE) 3555 flags |= SEC_DATA; 3556 else if (prot & BFD_MACH_O_PROT_READ) 3557 flags |= SEC_READONLY; 3558 } 3559 } 3560 } 3561 else 3562 { 3563 if ((flags & SEC_DEBUGGING) == 0) 3564 flags |= SEC_ALLOC; 3565 } 3566 3567 if (section->offset != 0) 3568 flags |= SEC_HAS_CONTENTS; 3569 if (section->nreloc != 0) 3570 flags |= SEC_RELOC; 3571 3572 bfd_set_section_flags (abfd, sec, flags); 3573 3574 sec->vma = section->addr; 3575 sec->lma = section->addr; 3576 sec->size = section->size; 3577 sec->filepos = section->offset; 3578 sec->alignment_power = section->align; 3579 sec->segment_mark = 0; 3580 sec->reloc_count = section->nreloc; 3581 sec->rel_filepos = section->reloff; 3582 } 3583 3584 static asection * 3585 bfd_mach_o_make_bfd_section (bfd *abfd, 3586 const unsigned char *segname, 3587 const unsigned char *sectname) 3588 { 3589 const char *sname; 3590 flagword flags; 3591 3592 bfd_mach_o_convert_section_name_to_bfd 3593 (abfd, (const char *)segname, (const char *)sectname, &sname, &flags); 3594 if (sname == NULL) 3595 return NULL; 3596 3597 return bfd_make_section_anyway_with_flags (abfd, sname, flags); 3598 } 3599 3600 static asection * 3601 bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot) 3602 { 3603 struct mach_o_section_32_external raw; 3604 asection *sec; 3605 bfd_mach_o_section *section; 3606 3607 if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd) 3608 != BFD_MACH_O_SECTION_SIZE) 3609 return NULL; 3610 3611 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3612 if (sec == NULL) 3613 return NULL; 3614 3615 section = bfd_mach_o_get_mach_o_section (sec); 3616 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3617 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3618 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3619 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3620 section->addr = bfd_h_get_32 (abfd, raw.addr); 3621 section->size = bfd_h_get_32 (abfd, raw.size); 3622 section->offset = bfd_h_get_32 (abfd, raw.offset); 3623 section->align = bfd_h_get_32 (abfd, raw.align); 3624 /* PR 17512: file: 0017eb76. */ 3625 if (section->align > 64) 3626 { 3627 _bfd_error_handler 3628 (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, " 3629 "using 32 instead"), section->align); 3630 section->align = 32; 3631 } 3632 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3633 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3634 section->flags = bfd_h_get_32 (abfd, raw.flags); 3635 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3636 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3637 section->reserved3 = 0; 3638 3639 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3640 3641 return sec; 3642 } 3643 3644 static asection * 3645 bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot) 3646 { 3647 struct mach_o_section_64_external raw; 3648 asection *sec; 3649 bfd_mach_o_section *section; 3650 3651 if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) 3652 != BFD_MACH_O_SECTION_64_SIZE) 3653 return NULL; 3654 3655 sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); 3656 if (sec == NULL) 3657 return NULL; 3658 3659 section = bfd_mach_o_get_mach_o_section (sec); 3660 memcpy (section->segname, raw.segname, sizeof (raw.segname)); 3661 section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; 3662 memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); 3663 section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; 3664 section->addr = bfd_h_get_64 (abfd, raw.addr); 3665 section->size = bfd_h_get_64 (abfd, raw.size); 3666 section->offset = bfd_h_get_32 (abfd, raw.offset); 3667 section->align = bfd_h_get_32 (abfd, raw.align); 3668 if (section->align > 64) 3669 { 3670 _bfd_error_handler 3671 (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, " 3672 "using 32 instead"), section->align); 3673 section->align = 32; 3674 } 3675 section->reloff = bfd_h_get_32 (abfd, raw.reloff); 3676 section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); 3677 section->flags = bfd_h_get_32 (abfd, raw.flags); 3678 section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); 3679 section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); 3680 section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3); 3681 3682 bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); 3683 3684 return sec; 3685 } 3686 3687 static asection * 3688 bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide) 3689 { 3690 if (wide) 3691 return bfd_mach_o_read_section_64 (abfd, prot); 3692 else 3693 return bfd_mach_o_read_section_32 (abfd, prot); 3694 } 3695 3696 static bfd_boolean 3697 bfd_mach_o_read_symtab_symbol (bfd *abfd, 3698 bfd_mach_o_symtab_command *sym, 3699 bfd_mach_o_asymbol *s, 3700 unsigned long i) 3701 { 3702 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3703 unsigned int wide = mach_o_wide_p (&mdata->header); 3704 unsigned int symwidth = 3705 wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; 3706 unsigned int symoff = sym->symoff + (i * symwidth); 3707 struct mach_o_nlist_64_external raw; 3708 unsigned char type = -1; 3709 unsigned char section = -1; 3710 short desc = -1; 3711 symvalue value = -1; 3712 unsigned long stroff = -1; 3713 unsigned int symtype = -1; 3714 3715 BFD_ASSERT (sym->strtab != NULL); 3716 3717 if (bfd_seek (abfd, symoff, SEEK_SET) != 0 3718 || bfd_bread (&raw, symwidth, abfd) != symwidth) 3719 { 3720 _bfd_error_handler 3721 /* xgettext:c-format */ 3722 (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"), 3723 symwidth, symoff); 3724 return FALSE; 3725 } 3726 3727 stroff = bfd_h_get_32 (abfd, raw.n_strx); 3728 type = bfd_h_get_8 (abfd, raw.n_type); 3729 symtype = type & BFD_MACH_O_N_TYPE; 3730 section = bfd_h_get_8 (abfd, raw.n_sect); 3731 desc = bfd_h_get_16 (abfd, raw.n_desc); 3732 if (wide) 3733 value = bfd_h_get_64 (abfd, raw.n_value); 3734 else 3735 value = bfd_h_get_32 (abfd, raw.n_value); 3736 3737 if (stroff >= sym->strsize) 3738 { 3739 _bfd_error_handler 3740 /* xgettext:c-format */ 3741 (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"), 3742 stroff, 3743 sym->strsize); 3744 return FALSE; 3745 } 3746 3747 s->symbol.the_bfd = abfd; 3748 s->symbol.name = sym->strtab + stroff; 3749 s->symbol.value = value; 3750 s->symbol.flags = 0x0; 3751 s->symbol.udata.i = i; 3752 s->n_type = type; 3753 s->n_sect = section; 3754 s->n_desc = desc; 3755 3756 if (type & BFD_MACH_O_N_STAB) 3757 { 3758 s->symbol.flags |= BSF_DEBUGGING; 3759 s->symbol.section = bfd_und_section_ptr; 3760 switch (type) 3761 { 3762 case N_FUN: 3763 case N_STSYM: 3764 case N_LCSYM: 3765 case N_BNSYM: 3766 case N_SLINE: 3767 case N_ENSYM: 3768 case N_ECOMM: 3769 case N_ECOML: 3770 case N_GSYM: 3771 if ((section > 0) && (section <= mdata->nsects)) 3772 { 3773 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3774 s->symbol.value = 3775 s->symbol.value - mdata->sections[section - 1]->addr; 3776 } 3777 break; 3778 } 3779 } 3780 else 3781 { 3782 if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)) 3783 s->symbol.flags |= BSF_GLOBAL; 3784 else 3785 s->symbol.flags |= BSF_LOCAL; 3786 3787 switch (symtype) 3788 { 3789 case BFD_MACH_O_N_UNDF: 3790 if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT) 3791 && s->symbol.value != 0) 3792 { 3793 /* A common symbol. */ 3794 s->symbol.section = bfd_com_section_ptr; 3795 s->symbol.flags = BSF_NO_FLAGS; 3796 } 3797 else 3798 { 3799 s->symbol.section = bfd_und_section_ptr; 3800 if (s->n_desc & BFD_MACH_O_N_WEAK_REF) 3801 s->symbol.flags |= BSF_WEAK; 3802 } 3803 break; 3804 case BFD_MACH_O_N_PBUD: 3805 s->symbol.section = bfd_und_section_ptr; 3806 break; 3807 case BFD_MACH_O_N_ABS: 3808 s->symbol.section = bfd_abs_section_ptr; 3809 break; 3810 case BFD_MACH_O_N_SECT: 3811 if ((section > 0) && (section <= mdata->nsects)) 3812 { 3813 s->symbol.section = mdata->sections[section - 1]->bfdsection; 3814 s->symbol.value = 3815 s->symbol.value - mdata->sections[section - 1]->addr; 3816 } 3817 else 3818 { 3819 /* Mach-O uses 0 to mean "no section"; not an error. */ 3820 if (section != 0) 3821 { 3822 _bfd_error_handler 3823 /* xgettext:c-format */ 3824 (_("bfd_mach_o_read_symtab_symbol: " 3825 "symbol \"%s\" specified invalid section %d (max %lu): " 3826 "setting to undefined"), 3827 s->symbol.name, section, mdata->nsects); 3828 } 3829 s->symbol.section = bfd_und_section_ptr; 3830 } 3831 break; 3832 case BFD_MACH_O_N_INDR: 3833 /* FIXME: we don't follow the BFD convention as this indirect symbol 3834 won't be followed by the referenced one. This looks harmless 3835 unless we start using the linker. */ 3836 s->symbol.flags |= BSF_INDIRECT; 3837 s->symbol.section = bfd_ind_section_ptr; 3838 s->symbol.value = 0; 3839 break; 3840 default: 3841 _bfd_error_handler 3842 /* xgettext:c-format */ 3843 (_("bfd_mach_o_read_symtab_symbol: " 3844 "symbol \"%s\" specified invalid type field 0x%x: " 3845 "setting to undefined"), s->symbol.name, symtype); 3846 s->symbol.section = bfd_und_section_ptr; 3847 break; 3848 } 3849 } 3850 3851 return TRUE; 3852 } 3853 3854 bfd_boolean 3855 bfd_mach_o_read_symtab_strtab (bfd *abfd) 3856 { 3857 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3858 bfd_mach_o_symtab_command *sym = mdata->symtab; 3859 3860 /* Fail if there is no symtab. */ 3861 if (sym == NULL) 3862 return FALSE; 3863 3864 /* Success if already loaded. */ 3865 if (sym->strtab) 3866 return TRUE; 3867 3868 if (abfd->flags & BFD_IN_MEMORY) 3869 { 3870 struct bfd_in_memory *b; 3871 3872 b = (struct bfd_in_memory *) abfd->iostream; 3873 3874 if ((sym->stroff + sym->strsize) > b->size) 3875 { 3876 bfd_set_error (bfd_error_file_truncated); 3877 return FALSE; 3878 } 3879 sym->strtab = (char *) b->buffer + sym->stroff; 3880 } 3881 else 3882 { 3883 /* See PR 21840 for a reproducer. */ 3884 if ((sym->strsize + 1) == 0) 3885 return FALSE; 3886 sym->strtab = bfd_alloc (abfd, sym->strsize + 1); 3887 if (sym->strtab == NULL) 3888 return FALSE; 3889 3890 if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0 3891 || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize) 3892 { 3893 /* PR 17512: file: 10888-1609-0.004. */ 3894 bfd_release (abfd, sym->strtab); 3895 sym->strtab = NULL; 3896 bfd_set_error (bfd_error_file_truncated); 3897 return FALSE; 3898 } 3899 /* Zero terminate the string table. */ 3900 sym->strtab[sym->strsize] = 0; 3901 } 3902 3903 return TRUE; 3904 } 3905 3906 bfd_boolean 3907 bfd_mach_o_read_symtab_symbols (bfd *abfd) 3908 { 3909 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 3910 bfd_mach_o_symtab_command *sym = mdata->symtab; 3911 unsigned long i; 3912 3913 if (sym == NULL || sym->symbols) 3914 /* Return now if there are no symbols or if already loaded. */ 3915 return TRUE; 3916 3917 sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol)); 3918 if (sym->symbols == NULL) 3919 { 3920 _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: " 3921 "unable to allocate memory for symbols")); 3922 sym->nsyms = 0; 3923 return FALSE; 3924 } 3925 3926 if (!bfd_mach_o_read_symtab_strtab (abfd)) 3927 goto fail; 3928 3929 for (i = 0; i < sym->nsyms; i++) 3930 if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i)) 3931 goto fail; 3932 3933 return TRUE; 3934 3935 fail: 3936 bfd_release (abfd, sym->symbols); 3937 sym->symbols = NULL; 3938 sym->nsyms = 0; 3939 return FALSE; 3940 } 3941 3942 static const char * 3943 bfd_mach_o_i386_flavour_string (unsigned int flavour) 3944 { 3945 switch ((int) flavour) 3946 { 3947 case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32"; 3948 case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32"; 3949 case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32"; 3950 case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64"; 3951 case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64"; 3952 case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64"; 3953 case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE"; 3954 case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE"; 3955 case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE"; 3956 case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32"; 3957 case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64"; 3958 case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE"; 3959 case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE"; 3960 default: return "UNKNOWN"; 3961 } 3962 } 3963 3964 static const char * 3965 bfd_mach_o_ppc_flavour_string (unsigned int flavour) 3966 { 3967 switch ((int) flavour) 3968 { 3969 case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE"; 3970 case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE"; 3971 case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE"; 3972 case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE"; 3973 case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64"; 3974 case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64"; 3975 default: return "UNKNOWN"; 3976 } 3977 } 3978 3979 static bfd_boolean 3980 bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command) 3981 { 3982 bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; 3983 struct mach_o_str_command_external raw; 3984 unsigned int nameoff; 3985 unsigned int namelen; 3986 3987 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 3988 return FALSE; 3989 3990 nameoff = bfd_h_get_32 (abfd, raw.str); 3991 3992 cmd->name_offset = nameoff; 3993 namelen = command->len - nameoff; 3994 nameoff += command->offset; 3995 cmd->name_str = bfd_alloc (abfd, namelen); 3996 if (cmd->name_str == NULL) 3997 return FALSE; 3998 if (bfd_seek (abfd, nameoff, SEEK_SET) != 0 3999 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 4000 return FALSE; 4001 return TRUE; 4002 } 4003 4004 static bfd_boolean 4005 bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) 4006 { 4007 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4008 bfd_mach_o_dylib_command *cmd = &command->command.dylib; 4009 struct mach_o_dylib_command_external raw; 4010 unsigned int nameoff; 4011 unsigned int namelen; 4012 4013 switch (command->type) 4014 { 4015 case BFD_MACH_O_LC_LOAD_DYLIB: 4016 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 4017 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 4018 case BFD_MACH_O_LC_ID_DYLIB: 4019 case BFD_MACH_O_LC_REEXPORT_DYLIB: 4020 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 4021 break; 4022 default: 4023 BFD_FAIL (); 4024 return FALSE; 4025 } 4026 4027 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4028 return FALSE; 4029 4030 nameoff = bfd_h_get_32 (abfd, raw.name); 4031 cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp); 4032 cmd->current_version = bfd_h_get_32 (abfd, raw.current_version); 4033 cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version); 4034 4035 cmd->name_offset = command->offset + nameoff; 4036 namelen = command->len - nameoff; 4037 cmd->name_str = bfd_alloc (abfd, namelen); 4038 if (cmd->name_str == NULL) 4039 return FALSE; 4040 if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0 4041 || bfd_bread (cmd->name_str, namelen, abfd) != namelen) 4042 return FALSE; 4043 return TRUE; 4044 } 4045 4046 static bfd_boolean 4047 bfd_mach_o_read_prebound_dylib (bfd *abfd, 4048 bfd_mach_o_load_command *command) 4049 { 4050 bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; 4051 struct mach_o_prebound_dylib_command_external raw; 4052 unsigned int nameoff; 4053 unsigned int modoff; 4054 unsigned int str_len; 4055 unsigned char *str; 4056 4057 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4058 return FALSE; 4059 4060 nameoff = bfd_h_get_32 (abfd, raw.name); 4061 modoff = bfd_h_get_32 (abfd, raw.linked_modules); 4062 if (nameoff > command->len || modoff > command->len) 4063 return FALSE; 4064 4065 str_len = command->len - sizeof (raw); 4066 str = bfd_alloc (abfd, str_len); 4067 if (str == NULL) 4068 return FALSE; 4069 if (bfd_bread (str, str_len, abfd) != str_len) 4070 return FALSE; 4071 4072 cmd->name_offset = command->offset + nameoff; 4073 cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules); 4074 cmd->linked_modules_offset = command->offset + modoff; 4075 4076 cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 4077 cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); 4078 return TRUE; 4079 } 4080 4081 static bfd_boolean 4082 bfd_mach_o_read_prebind_cksum (bfd *abfd, 4083 bfd_mach_o_load_command *command) 4084 { 4085 bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum; 4086 struct mach_o_prebind_cksum_command_external raw; 4087 4088 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4089 return FALSE; 4090 4091 cmd->cksum = bfd_get_32 (abfd, raw.cksum); 4092 return TRUE; 4093 } 4094 4095 static bfd_boolean 4096 bfd_mach_o_read_twolevel_hints (bfd *abfd, 4097 bfd_mach_o_load_command *command) 4098 { 4099 bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints; 4100 struct mach_o_twolevel_hints_command_external raw; 4101 4102 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4103 return FALSE; 4104 4105 cmd->offset = bfd_get_32 (abfd, raw.offset); 4106 cmd->nhints = bfd_get_32 (abfd, raw.nhints); 4107 return TRUE; 4108 } 4109 4110 static bfd_boolean 4111 bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command) 4112 { 4113 bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib; 4114 struct mach_o_fvmlib_command_external raw; 4115 unsigned int nameoff; 4116 unsigned int namelen; 4117 4118 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4119 return FALSE; 4120 4121 nameoff = bfd_h_get_32 (abfd, raw.name); 4122 fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version); 4123 fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr); 4124 4125 fvm->name_offset = command->offset + nameoff; 4126 namelen = command->len - nameoff; 4127 fvm->name_str = bfd_alloc (abfd, namelen); 4128 if (fvm->name_str == NULL) 4129 return FALSE; 4130 if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0 4131 || bfd_bread (fvm->name_str, namelen, abfd) != namelen) 4132 return FALSE; 4133 return TRUE; 4134 } 4135 4136 static bfd_boolean 4137 bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command) 4138 { 4139 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4140 bfd_mach_o_thread_command *cmd = &command->command.thread; 4141 unsigned int offset; 4142 unsigned int nflavours; 4143 unsigned int i; 4144 4145 BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) 4146 || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); 4147 4148 /* Count the number of threads. */ 4149 offset = 8; 4150 nflavours = 0; 4151 while (offset != command->len) 4152 { 4153 struct mach_o_thread_command_external raw; 4154 4155 if (offset >= command->len) 4156 return FALSE; 4157 4158 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4159 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4160 return FALSE; 4161 4162 offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4; 4163 nflavours++; 4164 } 4165 4166 /* Allocate threads. */ 4167 cmd->flavours = bfd_alloc2 4168 (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour)); 4169 if (cmd->flavours == NULL) 4170 return FALSE; 4171 cmd->nflavours = nflavours; 4172 4173 offset = 8; 4174 nflavours = 0; 4175 while (offset != command->len) 4176 { 4177 struct mach_o_thread_command_external raw; 4178 4179 if (offset >= command->len) 4180 return FALSE; 4181 4182 if (nflavours >= cmd->nflavours) 4183 return FALSE; 4184 4185 if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 4186 || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4187 return FALSE; 4188 4189 cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour); 4190 cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw); 4191 cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4; 4192 offset += cmd->flavours[nflavours].size + sizeof (raw); 4193 nflavours++; 4194 } 4195 4196 for (i = 0; i < nflavours; i++) 4197 { 4198 asection *bfdsec; 4199 unsigned int snamelen; 4200 char *sname; 4201 const char *flavourstr; 4202 const char *prefix = "LC_THREAD"; 4203 unsigned int j = 0; 4204 4205 switch (mdata->header.cputype) 4206 { 4207 case BFD_MACH_O_CPU_TYPE_POWERPC: 4208 case BFD_MACH_O_CPU_TYPE_POWERPC_64: 4209 flavourstr = 4210 bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); 4211 break; 4212 case BFD_MACH_O_CPU_TYPE_I386: 4213 case BFD_MACH_O_CPU_TYPE_X86_64: 4214 flavourstr = 4215 bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour); 4216 break; 4217 default: 4218 flavourstr = "UNKNOWN_ARCHITECTURE"; 4219 break; 4220 } 4221 4222 snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1; 4223 sname = bfd_alloc (abfd, snamelen); 4224 if (sname == NULL) 4225 return FALSE; 4226 4227 for (;;) 4228 { 4229 sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); 4230 if (bfd_get_section_by_name (abfd, sname) == NULL) 4231 break; 4232 j++; 4233 } 4234 4235 bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS); 4236 4237 bfdsec->vma = 0; 4238 bfdsec->lma = 0; 4239 bfdsec->size = cmd->flavours[i].size; 4240 bfdsec->filepos = cmd->flavours[i].offset; 4241 bfdsec->alignment_power = 0x0; 4242 4243 cmd->section = bfdsec; 4244 } 4245 4246 return TRUE; 4247 } 4248 4249 static bfd_boolean 4250 bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) 4251 { 4252 bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; 4253 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4254 4255 BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); 4256 4257 { 4258 struct mach_o_dysymtab_command_external raw; 4259 4260 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4261 return FALSE; 4262 4263 cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym); 4264 cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym); 4265 cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym); 4266 cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym); 4267 cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym); 4268 cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym); 4269 cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff); 4270 cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc); 4271 cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff); 4272 cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab); 4273 cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff); 4274 cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms); 4275 cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff); 4276 cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms); 4277 cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff); 4278 cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel); 4279 cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff); 4280 cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel); 4281 } 4282 4283 if (cmd->nmodtab != 0) 4284 { 4285 unsigned int i; 4286 int wide = bfd_mach_o_wide_p (abfd); 4287 unsigned int module_len = wide ? 56 : 52; 4288 4289 cmd->dylib_module = 4290 bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module)); 4291 if (cmd->dylib_module == NULL) 4292 return FALSE; 4293 4294 if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) 4295 return FALSE; 4296 4297 for (i = 0; i < cmd->nmodtab; i++) 4298 { 4299 bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; 4300 unsigned long v; 4301 unsigned char buf[56]; 4302 4303 if (bfd_bread ((void *) buf, module_len, abfd) != module_len) 4304 return FALSE; 4305 4306 module->module_name_idx = bfd_h_get_32 (abfd, buf + 0); 4307 module->iextdefsym = bfd_h_get_32 (abfd, buf + 4); 4308 module->nextdefsym = bfd_h_get_32 (abfd, buf + 8); 4309 module->irefsym = bfd_h_get_32 (abfd, buf + 12); 4310 module->nrefsym = bfd_h_get_32 (abfd, buf + 16); 4311 module->ilocalsym = bfd_h_get_32 (abfd, buf + 20); 4312 module->nlocalsym = bfd_h_get_32 (abfd, buf + 24); 4313 module->iextrel = bfd_h_get_32 (abfd, buf + 28); 4314 module->nextrel = bfd_h_get_32 (abfd, buf + 32); 4315 v = bfd_h_get_32 (abfd, buf +36); 4316 module->iinit = v & 0xffff; 4317 module->iterm = (v >> 16) & 0xffff; 4318 v = bfd_h_get_32 (abfd, buf + 40); 4319 module->ninit = v & 0xffff; 4320 module->nterm = (v >> 16) & 0xffff; 4321 if (wide) 4322 { 4323 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44); 4324 module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48); 4325 } 4326 else 4327 { 4328 module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44); 4329 module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48); 4330 } 4331 } 4332 } 4333 4334 if (cmd->ntoc != 0) 4335 { 4336 unsigned long i; 4337 4338 cmd->dylib_toc = bfd_alloc2 4339 (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content)); 4340 if (cmd->dylib_toc == NULL) 4341 return FALSE; 4342 4343 if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) 4344 return FALSE; 4345 4346 for (i = 0; i < cmd->ntoc; i++) 4347 { 4348 struct mach_o_dylib_table_of_contents_external raw; 4349 bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; 4350 4351 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4352 return FALSE; 4353 4354 toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index); 4355 toc->module_index = bfd_h_get_32 (abfd, raw.module_index); 4356 } 4357 } 4358 4359 if (cmd->nindirectsyms != 0) 4360 { 4361 unsigned int i; 4362 4363 cmd->indirect_syms = bfd_alloc2 4364 (abfd, cmd->nindirectsyms, sizeof (unsigned int)); 4365 if (cmd->indirect_syms == NULL) 4366 return FALSE; 4367 4368 if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) 4369 return FALSE; 4370 4371 for (i = 0; i < cmd->nindirectsyms; i++) 4372 { 4373 unsigned char raw[4]; 4374 unsigned int *is = &cmd->indirect_syms[i]; 4375 4376 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4377 return FALSE; 4378 4379 *is = bfd_h_get_32 (abfd, raw); 4380 } 4381 } 4382 4383 if (cmd->nextrefsyms != 0) 4384 { 4385 unsigned long v; 4386 unsigned int i; 4387 4388 cmd->ext_refs = bfd_alloc2 4389 (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference)); 4390 if (cmd->ext_refs == NULL) 4391 return FALSE; 4392 4393 if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) 4394 return FALSE; 4395 4396 for (i = 0; i < cmd->nextrefsyms; i++) 4397 { 4398 unsigned char raw[4]; 4399 bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; 4400 4401 if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) 4402 return FALSE; 4403 4404 /* Fields isym and flags are written as bit-fields, thus we need 4405 a specific processing for endianness. */ 4406 v = bfd_h_get_32 (abfd, raw); 4407 if (bfd_big_endian (abfd)) 4408 { 4409 ref->isym = (v >> 8) & 0xffffff; 4410 ref->flags = v & 0xff; 4411 } 4412 else 4413 { 4414 ref->isym = v & 0xffffff; 4415 ref->flags = (v >> 24) & 0xff; 4416 } 4417 } 4418 } 4419 4420 if (mdata->dysymtab) 4421 return FALSE; 4422 mdata->dysymtab = cmd; 4423 4424 return TRUE; 4425 } 4426 4427 static bfd_boolean 4428 bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) 4429 { 4430 bfd_mach_o_symtab_command *symtab = &command->command.symtab; 4431 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4432 struct mach_o_symtab_command_external raw; 4433 4434 BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); 4435 4436 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4437 return FALSE; 4438 4439 symtab->symoff = bfd_h_get_32 (abfd, raw.symoff); 4440 symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms); 4441 symtab->stroff = bfd_h_get_32 (abfd, raw.stroff); 4442 symtab->strsize = bfd_h_get_32 (abfd, raw.strsize); 4443 symtab->symbols = NULL; 4444 symtab->strtab = NULL; 4445 4446 if (symtab->nsyms != 0) 4447 abfd->flags |= HAS_SYMS; 4448 4449 if (mdata->symtab) 4450 return FALSE; 4451 mdata->symtab = symtab; 4452 return TRUE; 4453 } 4454 4455 static bfd_boolean 4456 bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command) 4457 { 4458 bfd_mach_o_uuid_command *cmd = &command->command.uuid; 4459 4460 BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID); 4461 4462 if (bfd_bread (cmd->uuid, 16, abfd) != 16) 4463 return FALSE; 4464 4465 return TRUE; 4466 } 4467 4468 static bfd_boolean 4469 bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command) 4470 { 4471 bfd_mach_o_linkedit_command *cmd = &command->command.linkedit; 4472 struct mach_o_linkedit_data_command_external raw; 4473 4474 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4475 return FALSE; 4476 4477 cmd->dataoff = bfd_get_32 (abfd, raw.dataoff); 4478 cmd->datasize = bfd_get_32 (abfd, raw.datasize); 4479 return TRUE; 4480 } 4481 4482 static bfd_boolean 4483 bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command) 4484 { 4485 bfd_mach_o_str_command *cmd = &command->command.str; 4486 struct mach_o_str_command_external raw; 4487 unsigned long off; 4488 4489 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4490 return FALSE; 4491 4492 off = bfd_get_32 (abfd, raw.str); 4493 cmd->stroff = command->offset + off; 4494 cmd->str_len = command->len - off; 4495 cmd->str = bfd_alloc (abfd, cmd->str_len); 4496 if (cmd->str == NULL) 4497 return FALSE; 4498 if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0 4499 || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len) 4500 return FALSE; 4501 return TRUE; 4502 } 4503 4504 static unsigned char * 4505 bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size) 4506 { 4507 unsigned char *buf; 4508 4509 buf = bfd_alloc (abfd, size); 4510 if (buf == NULL) 4511 return NULL; 4512 if (bfd_seek (abfd, off, SEEK_SET) != 0 4513 || bfd_bread (buf, size, abfd) != size) 4514 return NULL; 4515 return buf; 4516 } 4517 4518 static bfd_boolean 4519 bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd) 4520 { 4521 /* Read rebase content. */ 4522 if (cmd->rebase_content == NULL && cmd->rebase_size != 0) 4523 { 4524 cmd->rebase_content = 4525 bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size); 4526 if (cmd->rebase_content == NULL) 4527 return FALSE; 4528 } 4529 4530 /* Read bind content. */ 4531 if (cmd->bind_content == NULL && cmd->bind_size != 0) 4532 { 4533 cmd->bind_content = 4534 bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size); 4535 if (cmd->bind_content == NULL) 4536 return FALSE; 4537 } 4538 4539 /* Read weak bind content. */ 4540 if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0) 4541 { 4542 cmd->weak_bind_content = bfd_mach_o_alloc_and_read 4543 (abfd, cmd->weak_bind_off, cmd->weak_bind_size); 4544 if (cmd->weak_bind_content == NULL) 4545 return FALSE; 4546 } 4547 4548 /* Read lazy bind content. */ 4549 if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0) 4550 { 4551 cmd->lazy_bind_content = bfd_mach_o_alloc_and_read 4552 (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size); 4553 if (cmd->lazy_bind_content == NULL) 4554 return FALSE; 4555 } 4556 4557 /* Read export content. */ 4558 if (cmd->export_content == NULL && cmd->export_size != 0) 4559 { 4560 cmd->export_content = bfd_mach_o_alloc_and_read 4561 (abfd, cmd->export_off, cmd->export_size); 4562 if (cmd->export_content == NULL) 4563 return FALSE; 4564 } 4565 4566 return TRUE; 4567 } 4568 4569 static bfd_boolean 4570 bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) 4571 { 4572 bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; 4573 struct mach_o_dyld_info_command_external raw; 4574 4575 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4576 return FALSE; 4577 4578 cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off); 4579 cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size); 4580 cmd->rebase_content = NULL; 4581 cmd->bind_off = bfd_get_32 (abfd, raw.bind_off); 4582 cmd->bind_size = bfd_get_32 (abfd, raw.bind_size); 4583 cmd->bind_content = NULL; 4584 cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off); 4585 cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size); 4586 cmd->weak_bind_content = NULL; 4587 cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off); 4588 cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size); 4589 cmd->lazy_bind_content = NULL; 4590 cmd->export_off = bfd_get_32 (abfd, raw.export_off); 4591 cmd->export_size = bfd_get_32 (abfd, raw.export_size); 4592 cmd->export_content = NULL; 4593 return TRUE; 4594 } 4595 4596 static bfd_boolean 4597 bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command) 4598 { 4599 bfd_mach_o_version_min_command *cmd = &command->command.version_min; 4600 struct mach_o_version_min_command_external raw; 4601 4602 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4603 return FALSE; 4604 4605 cmd->version = bfd_get_32 (abfd, raw.version); 4606 cmd->sdk = bfd_get_32 (abfd, raw.sdk); 4607 return TRUE; 4608 } 4609 4610 static bfd_boolean 4611 bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command) 4612 { 4613 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4614 struct mach_o_encryption_info_command_external raw; 4615 4616 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4617 return FALSE; 4618 4619 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4620 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4621 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4622 return TRUE; 4623 } 4624 4625 static bfd_boolean 4626 bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command) 4627 { 4628 bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; 4629 struct mach_o_encryption_info_64_command_external raw; 4630 4631 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4632 return FALSE; 4633 4634 cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); 4635 cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); 4636 cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); 4637 return TRUE; 4638 } 4639 4640 static bfd_boolean 4641 bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command) 4642 { 4643 bfd_mach_o_main_command *cmd = &command->command.main; 4644 struct mach_o_entry_point_command_external raw; 4645 4646 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4647 return FALSE; 4648 4649 cmd->entryoff = bfd_get_64 (abfd, raw.entryoff); 4650 cmd->stacksize = bfd_get_64 (abfd, raw.stacksize); 4651 return TRUE; 4652 } 4653 4654 static bfd_boolean 4655 bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command) 4656 { 4657 bfd_mach_o_source_version_command *cmd = &command->command.source_version; 4658 struct mach_o_source_version_command_external raw; 4659 bfd_uint64_t ver; 4660 4661 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4662 return FALSE; 4663 4664 ver = bfd_get_64 (abfd, raw.version); 4665 /* Note: we use a serie of shift to avoid shift > 32 (for which gcc 4666 generates warnings) in case of the host doesn't support 64 bit 4667 integers. */ 4668 cmd->e = ver & 0x3ff; 4669 ver >>= 10; 4670 cmd->d = ver & 0x3ff; 4671 ver >>= 10; 4672 cmd->c = ver & 0x3ff; 4673 ver >>= 10; 4674 cmd->b = ver & 0x3ff; 4675 ver >>= 10; 4676 cmd->a = ver & 0xffffff; 4677 return TRUE; 4678 } 4679 4680 static bfd_boolean 4681 bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command) 4682 { 4683 bfd_mach_o_note_command *cmd = &command->command.note; 4684 struct mach_o_note_command_external raw; 4685 4686 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4687 return FALSE; 4688 4689 memcpy (cmd->data_owner, raw.data_owner, 16); 4690 cmd->offset = bfd_get_64 (abfd, raw.offset); 4691 cmd->size = bfd_get_64 (abfd, raw.size); 4692 return TRUE; 4693 } 4694 4695 static bfd_boolean 4696 bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command) 4697 { 4698 bfd_mach_o_build_version_command *cmd = &command->command.build_version; 4699 struct mach_o_build_version_command_external raw; 4700 4701 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4702 return FALSE; 4703 4704 cmd->platform = bfd_get_32 (abfd, raw.platform); 4705 cmd->minos = bfd_get_32 (abfd, raw.minos); 4706 cmd->sdk = bfd_get_32 (abfd, raw.sdk); 4707 cmd->ntools = bfd_get_32 (abfd, raw.ntools); 4708 return TRUE; 4709 } 4710 4711 static bfd_boolean 4712 bfd_mach_o_read_segment (bfd *abfd, 4713 bfd_mach_o_load_command *command, 4714 unsigned int wide) 4715 { 4716 bfd_mach_o_segment_command *seg = &command->command.segment; 4717 unsigned long i; 4718 4719 if (wide) 4720 { 4721 struct mach_o_segment_command_64_external raw; 4722 4723 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); 4724 4725 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4726 return FALSE; 4727 4728 memcpy (seg->segname, raw.segname, 16); 4729 seg->segname[16] = '\0'; 4730 4731 seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr); 4732 seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize); 4733 seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff); 4734 seg->filesize = bfd_h_get_64 (abfd, raw.filesize); 4735 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4736 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4737 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4738 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4739 } 4740 else 4741 { 4742 struct mach_o_segment_command_32_external raw; 4743 4744 BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); 4745 4746 if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) 4747 return FALSE; 4748 4749 memcpy (seg->segname, raw.segname, 16); 4750 seg->segname[16] = '\0'; 4751 4752 seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr); 4753 seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize); 4754 seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff); 4755 seg->filesize = bfd_h_get_32 (abfd, raw.filesize); 4756 seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); 4757 seg->initprot = bfd_h_get_32 (abfd, raw.initprot); 4758 seg->nsects = bfd_h_get_32 (abfd, raw.nsects); 4759 seg->flags = bfd_h_get_32 (abfd, raw.flags); 4760 } 4761 seg->sect_head = NULL; 4762 seg->sect_tail = NULL; 4763 4764 for (i = 0; i < seg->nsects; i++) 4765 { 4766 asection *sec; 4767 4768 sec = bfd_mach_o_read_section (abfd, seg->initprot, wide); 4769 if (sec == NULL) 4770 return FALSE; 4771 4772 bfd_mach_o_append_section_to_segment 4773 (seg, bfd_mach_o_get_mach_o_section (sec)); 4774 } 4775 4776 return TRUE; 4777 } 4778 4779 static bfd_boolean 4780 bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) 4781 { 4782 return bfd_mach_o_read_segment (abfd, command, 0); 4783 } 4784 4785 static bfd_boolean 4786 bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) 4787 { 4788 return bfd_mach_o_read_segment (abfd, command, 1); 4789 } 4790 4791 static bfd_boolean 4792 bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command) 4793 { 4794 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4795 struct mach_o_load_command_external raw; 4796 unsigned int cmd; 4797 4798 /* Read command type and length. */ 4799 if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0 4800 || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE) 4801 return FALSE; 4802 4803 cmd = bfd_h_get_32 (abfd, raw.cmd); 4804 command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD; 4805 command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE; 4806 command->len = bfd_h_get_32 (abfd, raw.cmdsize); 4807 4808 switch (command->type) 4809 { 4810 case BFD_MACH_O_LC_SEGMENT: 4811 if (!bfd_mach_o_read_segment_32 (abfd, command)) 4812 return FALSE; 4813 break; 4814 case BFD_MACH_O_LC_SEGMENT_64: 4815 if (!bfd_mach_o_read_segment_64 (abfd, command)) 4816 return FALSE; 4817 break; 4818 case BFD_MACH_O_LC_SYMTAB: 4819 if (!bfd_mach_o_read_symtab (abfd, command)) 4820 return FALSE; 4821 break; 4822 case BFD_MACH_O_LC_SYMSEG: 4823 break; 4824 case BFD_MACH_O_LC_THREAD: 4825 case BFD_MACH_O_LC_UNIXTHREAD: 4826 if (!bfd_mach_o_read_thread (abfd, command)) 4827 return FALSE; 4828 break; 4829 case BFD_MACH_O_LC_LOAD_DYLINKER: 4830 case BFD_MACH_O_LC_ID_DYLINKER: 4831 case BFD_MACH_O_LC_DYLD_ENVIRONMENT: 4832 if (!bfd_mach_o_read_dylinker (abfd, command)) 4833 return FALSE; 4834 break; 4835 case BFD_MACH_O_LC_LOAD_DYLIB: 4836 case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: 4837 case BFD_MACH_O_LC_ID_DYLIB: 4838 case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: 4839 case BFD_MACH_O_LC_REEXPORT_DYLIB: 4840 case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: 4841 if (!bfd_mach_o_read_dylib (abfd, command)) 4842 return FALSE; 4843 break; 4844 case BFD_MACH_O_LC_PREBOUND_DYLIB: 4845 if (!bfd_mach_o_read_prebound_dylib (abfd, command)) 4846 return FALSE; 4847 break; 4848 case BFD_MACH_O_LC_LOADFVMLIB: 4849 case BFD_MACH_O_LC_IDFVMLIB: 4850 if (!bfd_mach_o_read_fvmlib (abfd, command)) 4851 return FALSE; 4852 break; 4853 case BFD_MACH_O_LC_IDENT: 4854 case BFD_MACH_O_LC_FVMFILE: 4855 case BFD_MACH_O_LC_PREPAGE: 4856 case BFD_MACH_O_LC_ROUTINES: 4857 case BFD_MACH_O_LC_ROUTINES_64: 4858 break; 4859 case BFD_MACH_O_LC_SUB_FRAMEWORK: 4860 case BFD_MACH_O_LC_SUB_UMBRELLA: 4861 case BFD_MACH_O_LC_SUB_LIBRARY: 4862 case BFD_MACH_O_LC_SUB_CLIENT: 4863 case BFD_MACH_O_LC_RPATH: 4864 if (!bfd_mach_o_read_str (abfd, command)) 4865 return FALSE; 4866 break; 4867 case BFD_MACH_O_LC_DYSYMTAB: 4868 if (!bfd_mach_o_read_dysymtab (abfd, command)) 4869 return FALSE; 4870 break; 4871 case BFD_MACH_O_LC_PREBIND_CKSUM: 4872 if (!bfd_mach_o_read_prebind_cksum (abfd, command)) 4873 return FALSE; 4874 break; 4875 case BFD_MACH_O_LC_TWOLEVEL_HINTS: 4876 if (!bfd_mach_o_read_twolevel_hints (abfd, command)) 4877 return FALSE; 4878 break; 4879 case BFD_MACH_O_LC_UUID: 4880 if (!bfd_mach_o_read_uuid (abfd, command)) 4881 return FALSE; 4882 break; 4883 case BFD_MACH_O_LC_CODE_SIGNATURE: 4884 case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO: 4885 case BFD_MACH_O_LC_FUNCTION_STARTS: 4886 case BFD_MACH_O_LC_DATA_IN_CODE: 4887 case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS: 4888 case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT: 4889 if (!bfd_mach_o_read_linkedit (abfd, command)) 4890 return FALSE; 4891 break; 4892 case BFD_MACH_O_LC_ENCRYPTION_INFO: 4893 if (!bfd_mach_o_read_encryption_info (abfd, command)) 4894 return FALSE; 4895 break; 4896 case BFD_MACH_O_LC_ENCRYPTION_INFO_64: 4897 if (!bfd_mach_o_read_encryption_info_64 (abfd, command)) 4898 return FALSE; 4899 break; 4900 case BFD_MACH_O_LC_DYLD_INFO: 4901 if (!bfd_mach_o_read_dyld_info (abfd, command)) 4902 return FALSE; 4903 break; 4904 case BFD_MACH_O_LC_VERSION_MIN_MACOSX: 4905 case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS: 4906 case BFD_MACH_O_LC_VERSION_MIN_WATCHOS: 4907 case BFD_MACH_O_LC_VERSION_MIN_TVOS: 4908 if (!bfd_mach_o_read_version_min (abfd, command)) 4909 return FALSE; 4910 break; 4911 case BFD_MACH_O_LC_MAIN: 4912 if (!bfd_mach_o_read_main (abfd, command)) 4913 return FALSE; 4914 break; 4915 case BFD_MACH_O_LC_SOURCE_VERSION: 4916 if (!bfd_mach_o_read_source_version (abfd, command)) 4917 return FALSE; 4918 break; 4919 case BFD_MACH_O_LC_LINKER_OPTIONS: 4920 break; 4921 case BFD_MACH_O_LC_NOTE: 4922 if (!bfd_mach_o_read_note (abfd, command)) 4923 return FALSE; 4924 break; 4925 case BFD_MACH_O_LC_BUILD_VERSION: 4926 if (!bfd_mach_o_read_build_version (abfd, command)) 4927 return FALSE; 4928 break; 4929 default: 4930 command->len = 0; 4931 _bfd_error_handler (_("%pB: unknown load command %#x"), 4932 abfd, command->type); 4933 return FALSE; 4934 } 4935 4936 return TRUE; 4937 } 4938 4939 static void 4940 bfd_mach_o_flatten_sections (bfd *abfd) 4941 { 4942 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4943 bfd_mach_o_load_command *cmd; 4944 long csect = 0; 4945 4946 /* Count total number of sections. */ 4947 mdata->nsects = 0; 4948 4949 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4950 { 4951 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4952 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4953 { 4954 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4955 4956 mdata->nsects += seg->nsects; 4957 } 4958 } 4959 4960 /* Allocate sections array. */ 4961 mdata->sections = bfd_alloc2 (abfd, 4962 mdata->nsects, sizeof (bfd_mach_o_section *)); 4963 4964 /* Fill the array. */ 4965 csect = 0; 4966 4967 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4968 { 4969 if (cmd->type == BFD_MACH_O_LC_SEGMENT 4970 || cmd->type == BFD_MACH_O_LC_SEGMENT_64) 4971 { 4972 bfd_mach_o_segment_command *seg = &cmd->command.segment; 4973 bfd_mach_o_section *sec; 4974 4975 BFD_ASSERT (csect + seg->nsects <= mdata->nsects); 4976 4977 for (sec = seg->sect_head; sec != NULL; sec = sec->next) 4978 mdata->sections[csect++] = sec; 4979 } 4980 } 4981 } 4982 4983 static bfd_boolean 4984 bfd_mach_o_scan_start_address (bfd *abfd) 4985 { 4986 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 4987 bfd_mach_o_thread_command *thr = NULL; 4988 bfd_mach_o_load_command *cmd; 4989 unsigned long i; 4990 4991 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 4992 if (cmd->type == BFD_MACH_O_LC_THREAD 4993 || cmd->type == BFD_MACH_O_LC_UNIXTHREAD) 4994 { 4995 thr = &cmd->command.thread; 4996 break; 4997 } 4998 else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1) 4999 { 5000 bfd_mach_o_main_command *main_cmd = &cmd->command.main; 5001 bfd_mach_o_section *text_sect = mdata->sections[0]; 5002 5003 if (text_sect) 5004 { 5005 abfd->start_address = main_cmd->entryoff 5006 + (text_sect->addr - text_sect->offset); 5007 return TRUE; 5008 } 5009 } 5010 5011 /* An object file has no start address, so do not fail if not found. */ 5012 if (thr == NULL) 5013 return TRUE; 5014 5015 /* FIXME: create a subtarget hook ? */ 5016 for (i = 0; i < thr->nflavours; i++) 5017 { 5018 if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386) 5019 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32)) 5020 { 5021 unsigned char buf[4]; 5022 5023 if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0 5024 || bfd_bread (buf, 4, abfd) != 4) 5025 return FALSE; 5026 5027 abfd->start_address = bfd_h_get_32 (abfd, buf); 5028 } 5029 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC) 5030 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE)) 5031 { 5032 unsigned char buf[4]; 5033 5034 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 5035 || bfd_bread (buf, 4, abfd) != 4) 5036 return FALSE; 5037 5038 abfd->start_address = bfd_h_get_32 (abfd, buf); 5039 } 5040 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64) 5041 && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64)) 5042 { 5043 unsigned char buf[8]; 5044 5045 if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 5046 || bfd_bread (buf, 8, abfd) != 8) 5047 return FALSE; 5048 5049 abfd->start_address = bfd_h_get_64 (abfd, buf); 5050 } 5051 else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64) 5052 && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64)) 5053 { 5054 unsigned char buf[8]; 5055 5056 if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0 5057 || bfd_bread (buf, 8, abfd) != 8) 5058 return FALSE; 5059 5060 abfd->start_address = bfd_h_get_64 (abfd, buf); 5061 } 5062 } 5063 5064 return TRUE; 5065 } 5066 5067 bfd_boolean 5068 bfd_mach_o_set_arch_mach (bfd *abfd, 5069 enum bfd_architecture arch, 5070 unsigned long machine) 5071 { 5072 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 5073 5074 /* If this isn't the right architecture for this backend, and this 5075 isn't the generic backend, fail. */ 5076 if (arch != bed->arch 5077 && arch != bfd_arch_unknown 5078 && bed->arch != bfd_arch_unknown) 5079 return FALSE; 5080 5081 return bfd_default_set_arch_mach (abfd, arch, machine); 5082 } 5083 5084 static bfd_boolean 5085 bfd_mach_o_scan (bfd *abfd, 5086 bfd_mach_o_header *header, 5087 bfd_mach_o_data_struct *mdata) 5088 { 5089 unsigned int i; 5090 enum bfd_architecture cputype; 5091 unsigned long cpusubtype; 5092 unsigned int hdrsize; 5093 5094 hdrsize = mach_o_wide_p (header) ? 5095 BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; 5096 5097 mdata->header = *header; 5098 5099 abfd->flags = abfd->flags & BFD_IN_MEMORY; 5100 switch (header->filetype) 5101 { 5102 case BFD_MACH_O_MH_OBJECT: 5103 abfd->flags |= HAS_RELOC; 5104 break; 5105 case BFD_MACH_O_MH_EXECUTE: 5106 abfd->flags |= EXEC_P; 5107 break; 5108 case BFD_MACH_O_MH_DYLIB: 5109 case BFD_MACH_O_MH_BUNDLE: 5110 abfd->flags |= DYNAMIC; 5111 break; 5112 } 5113 5114 abfd->tdata.mach_o_data = mdata; 5115 5116 bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, 5117 &cputype, &cpusubtype); 5118 if (cputype == bfd_arch_unknown) 5119 { 5120 _bfd_error_handler 5121 /* xgettext:c-format */ 5122 (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"), 5123 header->cputype, header->cpusubtype); 5124 return FALSE; 5125 } 5126 5127 bfd_set_arch_mach (abfd, cputype, cpusubtype); 5128 5129 if (header->ncmds != 0) 5130 { 5131 bfd_mach_o_load_command *cmd; 5132 5133 mdata->first_command = NULL; 5134 mdata->last_command = NULL; 5135 5136 cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command)); 5137 if (cmd == NULL) 5138 return FALSE; 5139 5140 for (i = 0; i < header->ncmds; i++) 5141 { 5142 bfd_mach_o_load_command *cur = &cmd[i]; 5143 5144 bfd_mach_o_append_command (abfd, cur); 5145 5146 if (i == 0) 5147 cur->offset = hdrsize; 5148 else 5149 { 5150 bfd_mach_o_load_command *prev = &cmd[i - 1]; 5151 cur->offset = prev->offset + prev->len; 5152 } 5153 5154 if (!bfd_mach_o_read_command (abfd, cur)) 5155 return FALSE; 5156 } 5157 } 5158 5159 /* Sections should be flatten before scanning start address. */ 5160 bfd_mach_o_flatten_sections (abfd); 5161 if (!bfd_mach_o_scan_start_address (abfd)) 5162 return FALSE; 5163 5164 return TRUE; 5165 } 5166 5167 bfd_boolean 5168 bfd_mach_o_mkobject_init (bfd *abfd) 5169 { 5170 bfd_mach_o_data_struct *mdata = NULL; 5171 5172 mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); 5173 if (mdata == NULL) 5174 return FALSE; 5175 abfd->tdata.mach_o_data = mdata; 5176 5177 mdata->header.magic = 0; 5178 mdata->header.cputype = 0; 5179 mdata->header.cpusubtype = 0; 5180 mdata->header.filetype = 0; 5181 mdata->header.ncmds = 0; 5182 mdata->header.sizeofcmds = 0; 5183 mdata->header.flags = 0; 5184 mdata->header.byteorder = BFD_ENDIAN_UNKNOWN; 5185 mdata->first_command = NULL; 5186 mdata->last_command = NULL; 5187 mdata->nsects = 0; 5188 mdata->sections = NULL; 5189 mdata->dyn_reloc_cache = NULL; 5190 5191 return TRUE; 5192 } 5193 5194 static bfd_boolean 5195 bfd_mach_o_gen_mkobject (bfd *abfd) 5196 { 5197 bfd_mach_o_data_struct *mdata; 5198 5199 if (!bfd_mach_o_mkobject_init (abfd)) 5200 return FALSE; 5201 5202 mdata = bfd_mach_o_get_data (abfd); 5203 mdata->header.magic = BFD_MACH_O_MH_MAGIC; 5204 mdata->header.cputype = 0; 5205 mdata->header.cpusubtype = 0; 5206 mdata->header.byteorder = abfd->xvec->byteorder; 5207 mdata->header.version = 1; 5208 5209 return TRUE; 5210 } 5211 5212 const bfd_target * 5213 bfd_mach_o_header_p (bfd *abfd, 5214 file_ptr hdr_off, 5215 bfd_mach_o_filetype filetype, 5216 bfd_mach_o_cpu_type cputype) 5217 { 5218 bfd_mach_o_header header; 5219 bfd_mach_o_data_struct *mdata; 5220 5221 if (!bfd_mach_o_read_header (abfd, hdr_off, &header)) 5222 goto wrong; 5223 5224 if (! (header.byteorder == BFD_ENDIAN_BIG 5225 || header.byteorder == BFD_ENDIAN_LITTLE)) 5226 { 5227 _bfd_error_handler (_("unknown header byte-order value %#x"), 5228 header.byteorder); 5229 goto wrong; 5230 } 5231 5232 if (! ((header.byteorder == BFD_ENDIAN_BIG 5233 && abfd->xvec->byteorder == BFD_ENDIAN_BIG 5234 && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) 5235 || (header.byteorder == BFD_ENDIAN_LITTLE 5236 && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE 5237 && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) 5238 goto wrong; 5239 5240 /* Check cputype and filetype. 5241 In case of wildcard, do not accept magics that are handled by existing 5242 targets. */ 5243 if (cputype) 5244 { 5245 if (header.cputype != cputype) 5246 goto wrong; 5247 } 5248 else 5249 { 5250 #ifndef BFD64 5251 /* Do not recognize 64 architectures if not configured for 64bit targets. 5252 This could happen only for generic targets. */ 5253 if (mach_o_wide_p (&header)) 5254 goto wrong; 5255 #endif 5256 } 5257 5258 if (filetype) 5259 { 5260 if (header.filetype != filetype) 5261 goto wrong; 5262 } 5263 else 5264 { 5265 switch (header.filetype) 5266 { 5267 case BFD_MACH_O_MH_CORE: 5268 /* Handled by core_p */ 5269 goto wrong; 5270 default: 5271 break; 5272 } 5273 } 5274 5275 mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata)); 5276 if (mdata == NULL) 5277 goto fail; 5278 mdata->hdr_offset = hdr_off; 5279 5280 if (!bfd_mach_o_scan (abfd, &header, mdata)) 5281 goto wrong; 5282 5283 return abfd->xvec; 5284 5285 wrong: 5286 bfd_set_error (bfd_error_wrong_format); 5287 5288 fail: 5289 return NULL; 5290 } 5291 5292 static const bfd_target * 5293 bfd_mach_o_gen_object_p (bfd *abfd) 5294 { 5295 return bfd_mach_o_header_p (abfd, 0, 0, 0); 5296 } 5297 5298 static const bfd_target * 5299 bfd_mach_o_gen_core_p (bfd *abfd) 5300 { 5301 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0); 5302 } 5303 5304 /* Return the base address of ABFD, ie the address at which the image is 5305 mapped. The possible initial pagezero is ignored. */ 5306 5307 bfd_vma 5308 bfd_mach_o_get_base_address (bfd *abfd) 5309 { 5310 bfd_mach_o_data_struct *mdata; 5311 bfd_mach_o_load_command *cmd; 5312 5313 /* Check for Mach-O. */ 5314 if (!bfd_mach_o_valid (abfd)) 5315 return 0; 5316 mdata = bfd_mach_o_get_data (abfd); 5317 5318 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5319 { 5320 if ((cmd->type == BFD_MACH_O_LC_SEGMENT 5321 || cmd->type == BFD_MACH_O_LC_SEGMENT_64)) 5322 { 5323 struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment; 5324 5325 if (segcmd->initprot != 0) 5326 return segcmd->vmaddr; 5327 } 5328 } 5329 return 0; 5330 } 5331 5332 typedef struct mach_o_fat_archentry 5333 { 5334 unsigned long cputype; 5335 unsigned long cpusubtype; 5336 unsigned long offset; 5337 unsigned long size; 5338 unsigned long align; 5339 } mach_o_fat_archentry; 5340 5341 typedef struct mach_o_fat_data_struct 5342 { 5343 unsigned long magic; 5344 unsigned long nfat_arch; 5345 mach_o_fat_archentry *archentries; 5346 } mach_o_fat_data_struct; 5347 5348 const bfd_target * 5349 bfd_mach_o_fat_archive_p (bfd *abfd) 5350 { 5351 mach_o_fat_data_struct *adata = NULL; 5352 struct mach_o_fat_header_external hdr; 5353 unsigned long i; 5354 5355 if (bfd_seek (abfd, 0, SEEK_SET) != 0 5356 || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr)) 5357 goto error; 5358 5359 adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); 5360 if (adata == NULL) 5361 goto error; 5362 5363 adata->magic = bfd_getb32 (hdr.magic); 5364 adata->nfat_arch = bfd_getb32 (hdr.nfat_arch); 5365 if (adata->magic != 0xcafebabe) 5366 goto error; 5367 /* Avoid matching Java bytecode files, which have the same magic number. 5368 In the Java bytecode file format this field contains the JVM version, 5369 which starts at 43.0. */ 5370 if (adata->nfat_arch > 30) 5371 goto error; 5372 5373 adata->archentries = 5374 bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry)); 5375 if (adata->archentries == NULL) 5376 goto error; 5377 5378 for (i = 0; i < adata->nfat_arch; i++) 5379 { 5380 struct mach_o_fat_arch_external arch; 5381 if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch)) 5382 goto error; 5383 adata->archentries[i].cputype = bfd_getb32 (arch.cputype); 5384 adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype); 5385 adata->archentries[i].offset = bfd_getb32 (arch.offset); 5386 adata->archentries[i].size = bfd_getb32 (arch.size); 5387 adata->archentries[i].align = bfd_getb32 (arch.align); 5388 } 5389 5390 abfd->tdata.mach_o_fat_data = adata; 5391 5392 return abfd->xvec; 5393 5394 error: 5395 if (adata != NULL) 5396 bfd_release (abfd, adata); 5397 bfd_set_error (bfd_error_wrong_format); 5398 return NULL; 5399 } 5400 5401 /* Set the filename for a fat binary member ABFD, whose bfd architecture is 5402 ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY. 5403 Set arelt_data and origin fields too. */ 5404 5405 static void 5406 bfd_mach_o_fat_member_init (bfd *abfd, 5407 enum bfd_architecture arch_type, 5408 unsigned long arch_subtype, 5409 mach_o_fat_archentry *entry) 5410 { 5411 struct areltdata *areltdata; 5412 /* Create the member filename. Use ARCH_NAME. */ 5413 const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype); 5414 5415 if (ap) 5416 { 5417 /* Use the architecture name if known. */ 5418 abfd->filename = xstrdup (ap->printable_name); 5419 } 5420 else 5421 { 5422 /* Forge a uniq id. */ 5423 const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1; 5424 char *name = xmalloc (namelen); 5425 snprintf (name, namelen, "0x%lx-0x%lx", 5426 entry->cputype, entry->cpusubtype); 5427 abfd->filename = name; 5428 } 5429 5430 areltdata = bfd_zmalloc (sizeof (struct areltdata)); 5431 areltdata->parsed_size = entry->size; 5432 abfd->arelt_data = areltdata; 5433 abfd->iostream = NULL; 5434 abfd->origin = entry->offset; 5435 } 5436 5437 bfd * 5438 bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev) 5439 { 5440 mach_o_fat_data_struct *adata; 5441 mach_o_fat_archentry *entry = NULL; 5442 unsigned long i; 5443 bfd *nbfd; 5444 enum bfd_architecture arch_type; 5445 unsigned long arch_subtype; 5446 5447 adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; 5448 BFD_ASSERT (adata != NULL); 5449 5450 /* Find index of previous entry. */ 5451 if (prev == NULL) 5452 { 5453 /* Start at first one. */ 5454 i = 0; 5455 } 5456 else 5457 { 5458 /* Find index of PREV. */ 5459 for (i = 0; i < adata->nfat_arch; i++) 5460 { 5461 if (adata->archentries[i].offset == prev->origin) 5462 break; 5463 } 5464 5465 if (i == adata->nfat_arch) 5466 { 5467 /* Not found. */ 5468 bfd_set_error (bfd_error_bad_value); 5469 return NULL; 5470 } 5471 5472 /* Get next entry. */ 5473 i++; 5474 } 5475 5476 if (i >= adata->nfat_arch) 5477 { 5478 bfd_set_error (bfd_error_no_more_archived_files); 5479 return NULL; 5480 } 5481 5482 entry = &adata->archentries[i]; 5483 nbfd = _bfd_new_bfd_contained_in (archive); 5484 if (nbfd == NULL) 5485 return NULL; 5486 5487 bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype, 5488 &arch_type, &arch_subtype); 5489 5490 bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry); 5491 5492 bfd_set_arch_mach (nbfd, arch_type, arch_subtype); 5493 5494 return nbfd; 5495 } 5496 5497 /* Analogous to stat call. */ 5498 5499 static int 5500 bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf) 5501 { 5502 if (abfd->arelt_data == NULL) 5503 { 5504 bfd_set_error (bfd_error_invalid_operation); 5505 return -1; 5506 } 5507 5508 buf->st_mtime = 0; 5509 buf->st_uid = 0; 5510 buf->st_gid = 0; 5511 buf->st_mode = 0644; 5512 buf->st_size = arelt_size (abfd); 5513 5514 return 0; 5515 } 5516 5517 /* If ABFD format is FORMAT and architecture is ARCH, return it. 5518 If ABFD is a fat image containing a member that corresponds to FORMAT 5519 and ARCH, returns it. 5520 In other case, returns NULL. 5521 This function allows transparent uses of fat images. */ 5522 5523 bfd * 5524 bfd_mach_o_fat_extract (bfd *abfd, 5525 bfd_format format, 5526 const bfd_arch_info_type *arch) 5527 { 5528 bfd *res; 5529 mach_o_fat_data_struct *adata; 5530 unsigned int i; 5531 5532 if (bfd_check_format (abfd, format)) 5533 { 5534 if (bfd_get_arch_info (abfd) == arch) 5535 return abfd; 5536 return NULL; 5537 } 5538 if (!bfd_check_format (abfd, bfd_archive) 5539 || abfd->xvec != &mach_o_fat_vec) 5540 return NULL; 5541 5542 /* This is a Mach-O fat image. */ 5543 adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data; 5544 BFD_ASSERT (adata != NULL); 5545 5546 for (i = 0; i < adata->nfat_arch; i++) 5547 { 5548 struct mach_o_fat_archentry *e = &adata->archentries[i]; 5549 enum bfd_architecture cpu_type; 5550 unsigned long cpu_subtype; 5551 5552 bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype, 5553 &cpu_type, &cpu_subtype); 5554 if (cpu_type != arch->arch || cpu_subtype != arch->mach) 5555 continue; 5556 5557 /* The architecture is found. */ 5558 res = _bfd_new_bfd_contained_in (abfd); 5559 if (res == NULL) 5560 return NULL; 5561 5562 bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e); 5563 5564 if (bfd_check_format (res, format)) 5565 { 5566 BFD_ASSERT (bfd_get_arch_info (res) == arch); 5567 return res; 5568 } 5569 bfd_close (res); 5570 return NULL; 5571 } 5572 5573 return NULL; 5574 } 5575 5576 static bfd_boolean 5577 bfd_mach_o_fat_close_and_cleanup (bfd *abfd) 5578 { 5579 _bfd_unlink_from_archive_parent (abfd); 5580 return TRUE; 5581 } 5582 5583 int 5584 bfd_mach_o_lookup_command (bfd *abfd, 5585 bfd_mach_o_load_command_type type, 5586 bfd_mach_o_load_command **mcommand) 5587 { 5588 struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5589 struct bfd_mach_o_load_command *cmd; 5590 unsigned int num; 5591 5592 BFD_ASSERT (mdata != NULL); 5593 BFD_ASSERT (mcommand != NULL); 5594 5595 num = 0; 5596 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5597 { 5598 if (cmd->type != type) 5599 continue; 5600 5601 if (num == 0) 5602 *mcommand = cmd; 5603 num++; 5604 } 5605 5606 return num; 5607 } 5608 5609 unsigned long 5610 bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type) 5611 { 5612 switch (type) 5613 { 5614 case BFD_MACH_O_CPU_TYPE_MC680x0: 5615 return 0x04000000; 5616 case BFD_MACH_O_CPU_TYPE_POWERPC: 5617 return 0xc0000000; 5618 case BFD_MACH_O_CPU_TYPE_I386: 5619 return 0xc0000000; 5620 case BFD_MACH_O_CPU_TYPE_SPARC: 5621 return 0xf0000000; 5622 case BFD_MACH_O_CPU_TYPE_HPPA: 5623 return 0xc0000000 - 0x04000000; 5624 default: 5625 return 0; 5626 } 5627 } 5628 5629 /* The following two tables should be kept, as far as possible, in order of 5630 most frequently used entries to optimize their use from gas. */ 5631 5632 const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] = 5633 { 5634 { "regular", BFD_MACH_O_S_REGULAR}, 5635 { "coalesced", BFD_MACH_O_S_COALESCED}, 5636 { "zerofill", BFD_MACH_O_S_ZEROFILL}, 5637 { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS}, 5638 { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS}, 5639 { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS}, 5640 { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS}, 5641 { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS}, 5642 { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS}, 5643 { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS}, 5644 { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL}, 5645 { "interposing", BFD_MACH_O_S_INTERPOSING}, 5646 { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF}, 5647 { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS}, 5648 { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS}, 5649 { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS}, 5650 { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS}, 5651 { NULL, 0} 5652 }; 5653 5654 const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] = 5655 { 5656 { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS }, 5657 { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS }, 5658 { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC }, 5659 { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC }, 5660 { "debug", BFD_MACH_O_S_ATTR_DEBUG }, 5661 { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT }, 5662 { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP }, 5663 { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS }, 5664 { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC }, 5665 { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5666 { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, 5667 { NULL, 0} 5668 }; 5669 5670 /* Get the section type from NAME. Return 256 if NAME is unknown. */ 5671 5672 unsigned int 5673 bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name) 5674 { 5675 const bfd_mach_o_xlat_name *x; 5676 bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); 5677 5678 for (x = bfd_mach_o_section_type_name; x->name; x++) 5679 if (strcmp (x->name, name) == 0) 5680 { 5681 /* We found it... does the target support it? */ 5682 if (bed->bfd_mach_o_section_type_valid_for_target == NULL 5683 || bed->bfd_mach_o_section_type_valid_for_target (x->val)) 5684 return x->val; /* OK. */ 5685 else 5686 break; /* Not supported. */ 5687 } 5688 /* Maximum section ID = 0xff. */ 5689 return 256; 5690 } 5691 5692 /* Get the section attribute from NAME. Return -1 if NAME is unknown. */ 5693 5694 unsigned int 5695 bfd_mach_o_get_section_attribute_from_name (const char *name) 5696 { 5697 const bfd_mach_o_xlat_name *x; 5698 5699 for (x = bfd_mach_o_section_attribute_name; x->name; x++) 5700 if (strcmp (x->name, name) == 0) 5701 return x->val; 5702 return (unsigned int)-1; 5703 } 5704 5705 int 5706 bfd_mach_o_core_fetch_environment (bfd *abfd, 5707 unsigned char **rbuf, 5708 unsigned int *rlen) 5709 { 5710 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5711 unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype); 5712 bfd_mach_o_load_command *cmd; 5713 5714 for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) 5715 { 5716 bfd_mach_o_segment_command *seg; 5717 5718 if (cmd->type != BFD_MACH_O_LC_SEGMENT) 5719 continue; 5720 5721 seg = &cmd->command.segment; 5722 5723 if ((seg->vmaddr + seg->vmsize) == stackaddr) 5724 { 5725 unsigned long start = seg->fileoff; 5726 unsigned long end = seg->fileoff + seg->filesize; 5727 unsigned char *buf = bfd_malloc (1024); 5728 unsigned long size = 1024; 5729 5730 for (;;) 5731 { 5732 bfd_size_type nread = 0; 5733 unsigned long offset; 5734 int found_nonnull = 0; 5735 5736 if (size > (end - start)) 5737 size = (end - start); 5738 5739 buf = bfd_realloc_or_free (buf, size); 5740 if (buf == NULL) 5741 return -1; 5742 5743 if (bfd_seek (abfd, end - size, SEEK_SET) != 0) 5744 { 5745 free (buf); 5746 return -1; 5747 } 5748 5749 nread = bfd_bread (buf, size, abfd); 5750 5751 if (nread != size) 5752 { 5753 free (buf); 5754 return -1; 5755 } 5756 5757 for (offset = 4; offset <= size; offset += 4) 5758 { 5759 unsigned long val; 5760 5761 val = *((unsigned long *) (buf + size - offset)); 5762 if (! found_nonnull) 5763 { 5764 if (val != 0) 5765 found_nonnull = 1; 5766 } 5767 else if (val == 0x0) 5768 { 5769 unsigned long bottom; 5770 unsigned long top; 5771 5772 bottom = seg->fileoff + seg->filesize - offset; 5773 top = seg->fileoff + seg->filesize - 4; 5774 *rbuf = bfd_malloc (top - bottom); 5775 *rlen = top - bottom; 5776 5777 memcpy (*rbuf, buf + size - *rlen, *rlen); 5778 free (buf); 5779 return 0; 5780 } 5781 } 5782 5783 if (size == (end - start)) 5784 break; 5785 5786 size *= 2; 5787 } 5788 5789 free (buf); 5790 } 5791 } 5792 5793 return -1; 5794 } 5795 5796 char * 5797 bfd_mach_o_core_file_failing_command (bfd *abfd) 5798 { 5799 unsigned char *buf = NULL; 5800 unsigned int len = 0; 5801 int ret; 5802 5803 ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len); 5804 if (ret < 0) 5805 return NULL; 5806 5807 return (char *) buf; 5808 } 5809 5810 int 5811 bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 5812 { 5813 return 0; 5814 } 5815 5816 static bfd_mach_o_uuid_command * 5817 bfd_mach_o_lookup_uuid_command (bfd *abfd) 5818 { 5819 bfd_mach_o_load_command *uuid_cmd = NULL; 5820 int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd); 5821 if (ncmd != 1 || uuid_cmd == NULL) 5822 return FALSE; 5823 return &uuid_cmd->command.uuid; 5824 } 5825 5826 /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */ 5827 5828 static bfd_boolean 5829 bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd) 5830 { 5831 bfd_mach_o_uuid_command *dsym_uuid_cmd; 5832 5833 BFD_ASSERT (abfd); 5834 BFD_ASSERT (uuid_cmd); 5835 5836 if (!bfd_check_format (abfd, bfd_object)) 5837 return FALSE; 5838 5839 if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour 5840 || bfd_mach_o_get_data (abfd) == NULL 5841 || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM) 5842 return FALSE; 5843 5844 dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5845 if (dsym_uuid_cmd == NULL) 5846 return FALSE; 5847 5848 if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid, 5849 sizeof (uuid_cmd->uuid)) != 0) 5850 return FALSE; 5851 5852 return TRUE; 5853 } 5854 5855 /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD. 5856 The caller is responsible for closing the returned BFD object and 5857 its my_archive if the returned BFD is in a fat dSYM. */ 5858 5859 static bfd * 5860 bfd_mach_o_find_dsym (const char *dsym_filename, 5861 const bfd_mach_o_uuid_command *uuid_cmd, 5862 const bfd_arch_info_type *arch) 5863 { 5864 bfd *base_dsym_bfd, *dsym_bfd; 5865 5866 BFD_ASSERT (uuid_cmd); 5867 5868 base_dsym_bfd = bfd_openr (dsym_filename, NULL); 5869 if (base_dsym_bfd == NULL) 5870 return NULL; 5871 5872 dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch); 5873 if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd)) 5874 return dsym_bfd; 5875 5876 bfd_close (dsym_bfd); 5877 if (base_dsym_bfd != dsym_bfd) 5878 bfd_close (base_dsym_bfd); 5879 5880 return NULL; 5881 } 5882 5883 /* Return a BFD created from a dSYM file for ABFD. 5884 The caller is responsible for closing the returned BFD object, its 5885 filename, and its my_archive if the returned BFD is in a fat dSYM. */ 5886 5887 static bfd * 5888 bfd_mach_o_follow_dsym (bfd *abfd) 5889 { 5890 char *dsym_filename; 5891 bfd_mach_o_uuid_command *uuid_cmd; 5892 bfd *dsym_bfd, *base_bfd = abfd; 5893 const char *base_basename; 5894 5895 if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour) 5896 return NULL; 5897 5898 if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive)) 5899 base_bfd = abfd->my_archive; 5900 /* BFD may have been opened from a stream. */ 5901 if (base_bfd->filename == NULL) 5902 { 5903 bfd_set_error (bfd_error_invalid_operation); 5904 return NULL; 5905 } 5906 base_basename = lbasename (base_bfd->filename); 5907 5908 uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); 5909 if (uuid_cmd == NULL) 5910 return NULL; 5911 5912 /* TODO: We assume the DWARF file has the same as the binary's. 5913 It seems apple's GDB checks all files in the dSYM bundle directory. 5914 http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c 5915 */ 5916 dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename) 5917 + strlen (dsym_subdir) + 1 5918 + strlen (base_basename) + 1); 5919 sprintf (dsym_filename, "%s%s/%s", 5920 base_bfd->filename, dsym_subdir, base_basename); 5921 5922 dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd, 5923 bfd_get_arch_info (abfd)); 5924 if (dsym_bfd == NULL) 5925 free (dsym_filename); 5926 5927 return dsym_bfd; 5928 } 5929 5930 bfd_boolean 5931 bfd_mach_o_find_nearest_line (bfd *abfd, 5932 asymbol **symbols, 5933 asection *section, 5934 bfd_vma offset, 5935 const char **filename_ptr, 5936 const char **functionname_ptr, 5937 unsigned int *line_ptr, 5938 unsigned int *discriminator_ptr) 5939 { 5940 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5941 if (mdata == NULL) 5942 return FALSE; 5943 switch (mdata->header.filetype) 5944 { 5945 case BFD_MACH_O_MH_OBJECT: 5946 break; 5947 case BFD_MACH_O_MH_EXECUTE: 5948 case BFD_MACH_O_MH_DYLIB: 5949 case BFD_MACH_O_MH_BUNDLE: 5950 case BFD_MACH_O_MH_KEXT_BUNDLE: 5951 if (mdata->dwarf2_find_line_info == NULL) 5952 { 5953 mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd); 5954 /* When we couldn't find dSYM for this binary, we look for 5955 the debug information in the binary itself. In this way, 5956 we won't try finding separated dSYM again because 5957 mdata->dwarf2_find_line_info will be filled. */ 5958 if (! mdata->dsym_bfd) 5959 break; 5960 if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd, 5961 dwarf_debug_sections, symbols, 5962 &mdata->dwarf2_find_line_info, 5963 FALSE)) 5964 return FALSE; 5965 } 5966 break; 5967 default: 5968 return FALSE; 5969 } 5970 return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, 5971 filename_ptr, functionname_ptr, 5972 line_ptr, discriminator_ptr, 5973 dwarf_debug_sections, 0, 5974 &mdata->dwarf2_find_line_info); 5975 } 5976 5977 bfd_boolean 5978 bfd_mach_o_close_and_cleanup (bfd *abfd) 5979 { 5980 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 5981 if (bfd_get_format (abfd) == bfd_object && mdata != NULL) 5982 { 5983 _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info); 5984 bfd_mach_o_free_cached_info (abfd); 5985 if (mdata->dsym_bfd != NULL) 5986 { 5987 bfd *fat_bfd = mdata->dsym_bfd->my_archive; 5988 #if 0 5989 /* FIXME: PR 19435: This calculation to find the memory allocated by 5990 bfd_mach_o_follow_dsym for the filename does not always end up 5991 selecting the correct pointer. Unfortunately this problem is 5992 very hard to reproduce on a non Mach-O native system, so until it 5993 can be traced and fixed on such a system, this code will remain 5994 commented out. This does mean that there will be a memory leak, 5995 but it is small, and happens when we are closing down, so it 5996 should not matter too much. */ 5997 char *dsym_filename = (char *)(fat_bfd 5998 ? fat_bfd->filename 5999 : mdata->dsym_bfd->filename); 6000 #endif 6001 bfd_close (mdata->dsym_bfd); 6002 mdata->dsym_bfd = NULL; 6003 if (fat_bfd) 6004 bfd_close (fat_bfd); 6005 #if 0 6006 free (dsym_filename); 6007 #endif 6008 } 6009 } 6010 6011 return _bfd_generic_close_and_cleanup (abfd); 6012 } 6013 6014 bfd_boolean 6015 bfd_mach_o_free_cached_info (bfd *abfd) 6016 { 6017 bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); 6018 asection *asect; 6019 free (mdata->dyn_reloc_cache); 6020 mdata->dyn_reloc_cache = NULL; 6021 for (asect = abfd->sections; asect != NULL; asect = asect->next) 6022 { 6023 free (asect->relocation); 6024 asect->relocation = NULL; 6025 } 6026 6027 return TRUE; 6028 } 6029 6030 #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 6031 #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup 6032 6033 #define bfd_mach_o_canonicalize_one_reloc NULL 6034 #define bfd_mach_o_swap_reloc_out NULL 6035 #define bfd_mach_o_print_thread NULL 6036 #define bfd_mach_o_tgt_seg_table NULL 6037 #define bfd_mach_o_section_type_valid_for_tgt NULL 6038 6039 #define TARGET_NAME mach_o_be_vec 6040 #define TARGET_STRING "mach-o-be" 6041 #define TARGET_ARCHITECTURE bfd_arch_unknown 6042 #define TARGET_PAGESIZE 1 6043 #define TARGET_BIG_ENDIAN 1 6044 #define TARGET_ARCHIVE 0 6045 #define TARGET_PRIORITY 1 6046 #include "mach-o-target.c" 6047 6048 #undef TARGET_NAME 6049 #undef TARGET_STRING 6050 #undef TARGET_ARCHITECTURE 6051 #undef TARGET_PAGESIZE 6052 #undef TARGET_BIG_ENDIAN 6053 #undef TARGET_ARCHIVE 6054 #undef TARGET_PRIORITY 6055 6056 #define TARGET_NAME mach_o_le_vec 6057 #define TARGET_STRING "mach-o-le" 6058 #define TARGET_ARCHITECTURE bfd_arch_unknown 6059 #define TARGET_PAGESIZE 1 6060 #define TARGET_BIG_ENDIAN 0 6061 #define TARGET_ARCHIVE 0 6062 #define TARGET_PRIORITY 1 6063 6064 #include "mach-o-target.c" 6065 6066 #undef TARGET_NAME 6067 #undef TARGET_STRING 6068 #undef TARGET_ARCHITECTURE 6069 #undef TARGET_PAGESIZE 6070 #undef TARGET_BIG_ENDIAN 6071 #undef TARGET_ARCHIVE 6072 #undef TARGET_PRIORITY 6073 6074 /* Not yet handled: creating an archive. */ 6075 #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive 6076 6077 #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup 6078 6079 /* Not used. */ 6080 #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt 6081 #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file 6082 #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p 6083 6084 #define TARGET_NAME mach_o_fat_vec 6085 #define TARGET_STRING "mach-o-fat" 6086 #define TARGET_ARCHITECTURE bfd_arch_unknown 6087 #define TARGET_PAGESIZE 1 6088 #define TARGET_BIG_ENDIAN 1 6089 #define TARGET_ARCHIVE 1 6090 #define TARGET_PRIORITY 0 6091 6092 #include "mach-o-target.c" 6093 6094 #undef TARGET_NAME 6095 #undef TARGET_STRING 6096 #undef TARGET_ARCHITECTURE 6097 #undef TARGET_PAGESIZE 6098 #undef TARGET_BIG_ENDIAN 6099 #undef TARGET_ARCHIVE 6100 #undef TARGET_PRIORITY 6101