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