| 1 | /* Mach-O support for BFD. |
| 2 | Copyright (C) 1999-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include <limits.h> |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "libiberty.h" |
| 26 | #include "mach-o.h" |
| 27 | #include "aout/stab_gnu.h" |
| 28 | #include "mach-o/reloc.h" |
| 29 | #include "mach-o/external.h" |
| 30 | #include <ctype.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <string.h> |
| 33 | |
| 34 | #define bfd_mach_o_object_p bfd_mach_o_gen_object_p |
| 35 | #define bfd_mach_o_core_p bfd_mach_o_gen_core_p |
| 36 | #define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject |
| 37 | |
| 38 | #define FILE_ALIGN(off, algn) \ |
| 39 | (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1U << (algn))) |
| 40 | |
| 41 | static bfd_boolean |
| 42 | bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd); |
| 43 | |
| 44 | unsigned int |
| 45 | bfd_mach_o_version (bfd *abfd) |
| 46 | { |
| 47 | bfd_mach_o_data_struct *mdata = NULL; |
| 48 | |
| 49 | BFD_ASSERT (bfd_mach_o_valid (abfd)); |
| 50 | mdata = bfd_mach_o_get_data (abfd); |
| 51 | |
| 52 | return mdata->header.version; |
| 53 | } |
| 54 | |
| 55 | bfd_boolean |
| 56 | bfd_mach_o_valid (bfd *abfd) |
| 57 | { |
| 58 | if (abfd == NULL || abfd->xvec == NULL) |
| 59 | return FALSE; |
| 60 | |
| 61 | if (abfd->xvec->flavour != bfd_target_mach_o_flavour) |
| 62 | return FALSE; |
| 63 | |
| 64 | if (bfd_mach_o_get_data (abfd) == NULL) |
| 65 | return FALSE; |
| 66 | return TRUE; |
| 67 | } |
| 68 | |
| 69 | static INLINE bfd_boolean |
| 70 | mach_o_wide_p (bfd_mach_o_header *header) |
| 71 | { |
| 72 | switch (header->version) |
| 73 | { |
| 74 | case 1: |
| 75 | return FALSE; |
| 76 | case 2: |
| 77 | return TRUE; |
| 78 | default: |
| 79 | BFD_FAIL (); |
| 80 | return FALSE; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | static INLINE bfd_boolean |
| 85 | bfd_mach_o_wide_p (bfd *abfd) |
| 86 | { |
| 87 | return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header); |
| 88 | } |
| 89 | |
| 90 | /* Tables to translate well known Mach-O segment/section names to bfd |
| 91 | names. Use of canonical names (such as .text or .debug_frame) is required |
| 92 | by gdb. */ |
| 93 | |
| 94 | /* __TEXT Segment. */ |
| 95 | static const mach_o_section_name_xlat text_section_names_xlat[] = |
| 96 | { |
| 97 | { ".text", "__text", |
| 98 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 99 | BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0}, |
| 100 | { ".const", "__const", |
| 101 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 102 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 103 | { ".static_const", "__static_const", |
| 104 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 105 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 106 | { ".cstring", "__cstring", |
| 107 | SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS, |
| 108 | BFD_MACH_O_S_CSTRING_LITERALS, |
| 109 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 110 | { ".literal4", "__literal4", |
| 111 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS, |
| 112 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 113 | { ".literal8", "__literal8", |
| 114 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS, |
| 115 | BFD_MACH_O_S_ATTR_NONE, 3}, |
| 116 | { ".literal16", "__literal16", |
| 117 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS, |
| 118 | BFD_MACH_O_S_ATTR_NONE, 4}, |
| 119 | { ".constructor", "__constructor", |
| 120 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 121 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 122 | { ".destructor", "__destructor", |
| 123 | SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 124 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 125 | { ".eh_frame", "__eh_frame", |
| 126 | SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, |
| 127 | BFD_MACH_O_S_ATTR_LIVE_SUPPORT |
| 128 | | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS |
| 129 | | BFD_MACH_O_S_ATTR_NO_TOC, 2}, |
| 130 | { NULL, NULL, 0, 0, 0, 0} |
| 131 | }; |
| 132 | |
| 133 | /* __DATA Segment. */ |
| 134 | static const mach_o_section_name_xlat data_section_names_xlat[] = |
| 135 | { |
| 136 | { ".data", "__data", |
| 137 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 138 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 139 | { ".bss", "__bss", |
| 140 | SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL, |
| 141 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 142 | { ".const_data", "__const", |
| 143 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 144 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 145 | { ".static_data", "__static_data", |
| 146 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 147 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 148 | { ".mod_init_func", "__mod_init_func", |
| 149 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS, |
| 150 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 151 | { ".mod_term_func", "__mod_term_func", |
| 152 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS, |
| 153 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 154 | { ".dyld", "__dyld", |
| 155 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 156 | BFD_MACH_O_S_ATTR_NONE, 0}, |
| 157 | { ".cfstring", "__cfstring", |
| 158 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 159 | BFD_MACH_O_S_ATTR_NONE, 2}, |
| 160 | { NULL, NULL, 0, 0, 0, 0} |
| 161 | }; |
| 162 | |
| 163 | /* __DWARF Segment. */ |
| 164 | static const mach_o_section_name_xlat dwarf_section_names_xlat[] = |
| 165 | { |
| 166 | { ".debug_frame", "__debug_frame", |
| 167 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 168 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 169 | { ".debug_info", "__debug_info", |
| 170 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 171 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 172 | { ".debug_abbrev", "__debug_abbrev", |
| 173 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 174 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 175 | { ".debug_aranges", "__debug_aranges", |
| 176 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 177 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 178 | { ".debug_macinfo", "__debug_macinfo", |
| 179 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 180 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 181 | { ".debug_line", "__debug_line", |
| 182 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 183 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 184 | { ".debug_loc", "__debug_loc", |
| 185 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 186 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 187 | { ".debug_pubnames", "__debug_pubnames", |
| 188 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 189 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 190 | { ".debug_pubtypes", "__debug_pubtypes", |
| 191 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 192 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 193 | { ".debug_str", "__debug_str", |
| 194 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 195 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 196 | { ".debug_ranges", "__debug_ranges", |
| 197 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 198 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 199 | { ".debug_macro", "__debug_macro", |
| 200 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 201 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 202 | { ".debug_gdb_scripts", "__debug_gdb_scri", |
| 203 | SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, |
| 204 | BFD_MACH_O_S_ATTR_DEBUG, 0}, |
| 205 | { NULL, NULL, 0, 0, 0, 0} |
| 206 | }; |
| 207 | |
| 208 | /* __OBJC Segment. */ |
| 209 | static const mach_o_section_name_xlat objc_section_names_xlat[] = |
| 210 | { |
| 211 | { ".objc_class", "__class", |
| 212 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 213 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 214 | { ".objc_meta_class", "__meta_class", |
| 215 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 216 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 217 | { ".objc_cat_cls_meth", "__cat_cls_meth", |
| 218 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 219 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 220 | { ".objc_cat_inst_meth", "__cat_inst_meth", |
| 221 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 222 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 223 | { ".objc_protocol", "__protocol", |
| 224 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 225 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 226 | { ".objc_string_object", "__string_object", |
| 227 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 228 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 229 | { ".objc_cls_meth", "__cls_meth", |
| 230 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 231 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 232 | { ".objc_inst_meth", "__inst_meth", |
| 233 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 234 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 235 | { ".objc_cls_refs", "__cls_refs", |
| 236 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, |
| 237 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 238 | { ".objc_message_refs", "__message_refs", |
| 239 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, |
| 240 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 241 | { ".objc_symbols", "__symbols", |
| 242 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 243 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 244 | { ".objc_category", "__category", |
| 245 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 246 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 247 | { ".objc_class_vars", "__class_vars", |
| 248 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 249 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 250 | { ".objc_instance_vars", "__instance_vars", |
| 251 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 252 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 253 | { ".objc_module_info", "__module_info", |
| 254 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 255 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 256 | { ".objc_selector_strs", "__selector_strs", |
| 257 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS, |
| 258 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 259 | { ".objc_image_info", "__image_info", |
| 260 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 261 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 262 | { ".objc_selector_fixup", "__sel_fixup", |
| 263 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 264 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 265 | /* Objc V1 */ |
| 266 | { ".objc1_class_ext", "__class_ext", |
| 267 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 268 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 269 | { ".objc1_property_list", "__property", |
| 270 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 271 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 272 | { ".objc1_protocol_ext", "__protocol_ext", |
| 273 | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, |
| 274 | BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, |
| 275 | { NULL, NULL, 0, 0, 0, 0} |
| 276 | }; |
| 277 | |
| 278 | static const mach_o_segment_name_xlat segsec_names_xlat[] = |
| 279 | { |
| 280 | { "__TEXT", text_section_names_xlat }, |
| 281 | { "__DATA", data_section_names_xlat }, |
| 282 | { "__DWARF", dwarf_section_names_xlat }, |
| 283 | { "__OBJC", objc_section_names_xlat }, |
| 284 | { NULL, NULL } |
| 285 | }; |
| 286 | |
| 287 | static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF"; |
| 288 | |
| 289 | /* For both cases bfd-name => mach-o name and vice versa, the specific target |
| 290 | is checked before the generic. This allows a target (e.g. ppc for cstring) |
| 291 | to override the generic definition with a more specific one. */ |
| 292 | |
| 293 | /* Fetch the translation from a Mach-O section designation (segment, section) |
| 294 | as a bfd short name, if one exists. Otherwise return NULL. |
| 295 | |
| 296 | Allow the segment and section names to be unterminated 16 byte arrays. */ |
| 297 | |
| 298 | const mach_o_section_name_xlat * |
| 299 | bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname, |
| 300 | const char *sectname) |
| 301 | { |
| 302 | const struct mach_o_segment_name_xlat *seg; |
| 303 | const mach_o_section_name_xlat *sec; |
| 304 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 305 | |
| 306 | /* First try any target-specific translations defined... */ |
| 307 | if (bed->segsec_names_xlat) |
| 308 | for (seg = bed->segsec_names_xlat; seg->segname; seg++) |
| 309 | if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) |
| 310 | for (sec = seg->sections; sec->mach_o_name; sec++) |
| 311 | if (strncmp (sec->mach_o_name, sectname, |
| 312 | BFD_MACH_O_SECTNAME_SIZE) == 0) |
| 313 | return sec; |
| 314 | |
| 315 | /* ... and then the Mach-O generic ones. */ |
| 316 | for (seg = segsec_names_xlat; seg->segname; seg++) |
| 317 | if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) |
| 318 | for (sec = seg->sections; sec->mach_o_name; sec++) |
| 319 | if (strncmp (sec->mach_o_name, sectname, |
| 320 | BFD_MACH_O_SECTNAME_SIZE) == 0) |
| 321 | return sec; |
| 322 | |
| 323 | return NULL; |
| 324 | } |
| 325 | |
| 326 | /* If the bfd_name for this section is a 'canonical' form for which we |
| 327 | know the Mach-O data, return the segment name and the data for the |
| 328 | Mach-O equivalent. Otherwise return NULL. */ |
| 329 | |
| 330 | const mach_o_section_name_xlat * |
| 331 | bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name, |
| 332 | const char **segname) |
| 333 | { |
| 334 | const struct mach_o_segment_name_xlat *seg; |
| 335 | const mach_o_section_name_xlat *sec; |
| 336 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 337 | *segname = NULL; |
| 338 | |
| 339 | if (bfd_name[0] != '.') |
| 340 | return NULL; |
| 341 | |
| 342 | /* First try any target-specific translations defined... */ |
| 343 | if (bed->segsec_names_xlat) |
| 344 | for (seg = bed->segsec_names_xlat; seg->segname; seg++) |
| 345 | for (sec = seg->sections; sec->bfd_name; sec++) |
| 346 | if (strcmp (bfd_name, sec->bfd_name) == 0) |
| 347 | { |
| 348 | *segname = seg->segname; |
| 349 | return sec; |
| 350 | } |
| 351 | |
| 352 | /* ... and then the Mach-O generic ones. */ |
| 353 | for (seg = segsec_names_xlat; seg->segname; seg++) |
| 354 | for (sec = seg->sections; sec->bfd_name; sec++) |
| 355 | if (strcmp (bfd_name, sec->bfd_name) == 0) |
| 356 | { |
| 357 | *segname = seg->segname; |
| 358 | return sec; |
| 359 | } |
| 360 | |
| 361 | return NULL; |
| 362 | } |
| 363 | |
| 364 | /* Convert Mach-O section name to BFD. |
| 365 | |
| 366 | Try to use standard/canonical names, for which we have tables including |
| 367 | default flag settings - which are returned. Otherwise forge a new name |
| 368 | in the form "<segmentname>.<sectionname>" this will be prefixed with |
| 369 | LC_SEGMENT. if the segment name does not begin with an underscore. |
| 370 | |
| 371 | SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL- |
| 372 | terminated if the name length is exactly 16 bytes - but must be if the name |
| 373 | length is less than 16 characters). */ |
| 374 | |
| 375 | void |
| 376 | bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname, |
| 377 | const char *secname, const char **name, |
| 378 | flagword *flags) |
| 379 | { |
| 380 | const mach_o_section_name_xlat *xlat; |
| 381 | char *res; |
| 382 | unsigned int len; |
| 383 | const char *pfx = ""; |
| 384 | |
| 385 | *name = NULL; |
| 386 | *flags = SEC_NO_FLAGS; |
| 387 | |
| 388 | /* First search for a canonical name... |
| 389 | xlat will be non-null if there is an entry for segname, secname. */ |
| 390 | xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname); |
| 391 | if (xlat) |
| 392 | { |
| 393 | len = strlen (xlat->bfd_name); |
| 394 | res = bfd_alloc (abfd, len + 1); |
| 395 | if (res == NULL) |
| 396 | return; |
| 397 | memcpy (res, xlat->bfd_name, len+1); |
| 398 | *name = res; |
| 399 | *flags = xlat->bfd_flags; |
| 400 | return; |
| 401 | } |
| 402 | |
| 403 | /* ... else we make up a bfd name from the segment concatenated with the |
| 404 | section. */ |
| 405 | |
| 406 | len = 16 + 1 + 16 + 1; |
| 407 | |
| 408 | /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start |
| 409 | with an underscore. */ |
| 410 | if (segname[0] != '_') |
| 411 | { |
| 412 | static const char seg_pfx[] = "LC_SEGMENT."; |
| 413 | |
| 414 | pfx = seg_pfx; |
| 415 | len += sizeof (seg_pfx) - 1; |
| 416 | } |
| 417 | |
| 418 | res = bfd_alloc (abfd, len); |
| 419 | if (res == NULL) |
| 420 | return; |
| 421 | snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname); |
| 422 | *name = res; |
| 423 | } |
| 424 | |
| 425 | /* Convert a bfd section name to a Mach-O segment + section name. |
| 426 | |
| 427 | If the name is a canonical one for which we have a Darwin match |
| 428 | return the translation table - which contains defaults for flags, |
| 429 | type, attribute and default alignment data. |
| 430 | |
| 431 | Otherwise, expand the bfd_name (assumed to be in the form |
| 432 | "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */ |
| 433 | |
| 434 | static const mach_o_section_name_xlat * |
| 435 | bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED, |
| 436 | asection *sect, |
| 437 | bfd_mach_o_section *section) |
| 438 | { |
| 439 | const mach_o_section_name_xlat *xlat; |
| 440 | const char *name = bfd_get_section_name (abfd, sect); |
| 441 | const char *segname; |
| 442 | const char *dot; |
| 443 | unsigned int len; |
| 444 | unsigned int seglen; |
| 445 | unsigned int seclen; |
| 446 | |
| 447 | memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1); |
| 448 | memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1); |
| 449 | |
| 450 | /* See if is a canonical name ... */ |
| 451 | xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname); |
| 452 | if (xlat) |
| 453 | { |
| 454 | strcpy (section->segname, segname); |
| 455 | strcpy (section->sectname, xlat->mach_o_name); |
| 456 | return xlat; |
| 457 | } |
| 458 | |
| 459 | /* .. else we convert our constructed one back to Mach-O. |
| 460 | Strip LC_SEGMENT. prefix, if present. */ |
| 461 | if (strncmp (name, "LC_SEGMENT.", 11) == 0) |
| 462 | name += 11; |
| 463 | |
| 464 | /* Find a dot. */ |
| 465 | dot = strchr (name, '.'); |
| 466 | len = strlen (name); |
| 467 | |
| 468 | /* Try to split name into segment and section names. */ |
| 469 | if (dot && dot != name) |
| 470 | { |
| 471 | seglen = dot - name; |
| 472 | seclen = len - (dot + 1 - name); |
| 473 | |
| 474 | if (seglen <= BFD_MACH_O_SEGNAME_SIZE |
| 475 | && seclen <= BFD_MACH_O_SECTNAME_SIZE) |
| 476 | { |
| 477 | memcpy (section->segname, name, seglen); |
| 478 | section->segname[seglen] = 0; |
| 479 | memcpy (section->sectname, dot + 1, seclen); |
| 480 | section->sectname[seclen] = 0; |
| 481 | return NULL; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* The segment and section names are both missing - don't make them |
| 486 | into dots. */ |
| 487 | if (dot && dot == name) |
| 488 | return NULL; |
| 489 | |
| 490 | /* Just duplicate the name into both segment and section. */ |
| 491 | if (len > 16) |
| 492 | len = 16; |
| 493 | memcpy (section->segname, name, len); |
| 494 | section->segname[len] = 0; |
| 495 | memcpy (section->sectname, name, len); |
| 496 | section->sectname[len] = 0; |
| 497 | return NULL; |
| 498 | } |
| 499 | |
| 500 | /* Return the size of an entry for section SEC. |
| 501 | Must be called only for symbol pointer section and symbol stubs |
| 502 | sections. */ |
| 503 | |
| 504 | unsigned int |
| 505 | bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec) |
| 506 | { |
| 507 | switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 508 | { |
| 509 | case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: |
| 510 | case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: |
| 511 | return bfd_mach_o_wide_p (abfd) ? 8 : 4; |
| 512 | case BFD_MACH_O_S_SYMBOL_STUBS: |
| 513 | return sec->reserved2; |
| 514 | default: |
| 515 | BFD_FAIL (); |
| 516 | return 0; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | /* Return the number of indirect symbols for a section. |
| 521 | Must be called only for symbol pointer section and symbol stubs |
| 522 | sections. */ |
| 523 | |
| 524 | unsigned int |
| 525 | bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec) |
| 526 | { |
| 527 | unsigned int elsz; |
| 528 | |
| 529 | elsz = bfd_mach_o_section_get_entry_size (abfd, sec); |
| 530 | if (elsz == 0) |
| 531 | return 0; |
| 532 | else |
| 533 | return sec->size / elsz; |
| 534 | } |
| 535 | |
| 536 | /* Append command CMD to ABFD. Note that header.ncmds is not updated. */ |
| 537 | |
| 538 | static void |
| 539 | bfd_mach_o_append_command (bfd *abfd, bfd_mach_o_load_command *cmd) |
| 540 | { |
| 541 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 542 | |
| 543 | if (mdata->last_command != NULL) |
| 544 | mdata->last_command->next = cmd; |
| 545 | else |
| 546 | mdata->first_command = cmd; |
| 547 | mdata->last_command = cmd; |
| 548 | cmd->next = NULL; |
| 549 | } |
| 550 | |
| 551 | /* Copy any private info we understand from the input symbol |
| 552 | to the output symbol. */ |
| 553 | |
| 554 | bfd_boolean |
| 555 | bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| 556 | asymbol *isymbol, |
| 557 | bfd *obfd ATTRIBUTE_UNUSED, |
| 558 | asymbol *osymbol) |
| 559 | { |
| 560 | bfd_mach_o_asymbol *os, *is; |
| 561 | |
| 562 | os = (bfd_mach_o_asymbol *)osymbol; |
| 563 | is = (bfd_mach_o_asymbol *)isymbol; |
| 564 | os->n_type = is->n_type; |
| 565 | os->n_sect = is->n_sect; |
| 566 | os->n_desc = is->n_desc; |
| 567 | os->symbol.udata.i = is->symbol.udata.i; |
| 568 | |
| 569 | return TRUE; |
| 570 | } |
| 571 | |
| 572 | /* Copy any private info we understand from the input section |
| 573 | to the output section. */ |
| 574 | |
| 575 | bfd_boolean |
| 576 | bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd, asection *isection, |
| 577 | bfd *obfd, asection *osection) |
| 578 | { |
| 579 | bfd_mach_o_section *os = bfd_mach_o_get_mach_o_section (osection); |
| 580 | bfd_mach_o_section *is = bfd_mach_o_get_mach_o_section (isection); |
| 581 | |
| 582 | if (ibfd->xvec->flavour != bfd_target_mach_o_flavour |
| 583 | || obfd->xvec->flavour != bfd_target_mach_o_flavour) |
| 584 | return TRUE; |
| 585 | |
| 586 | BFD_ASSERT (is != NULL && os != NULL); |
| 587 | |
| 588 | os->flags = is->flags; |
| 589 | os->reserved1 = is->reserved1; |
| 590 | os->reserved2 = is->reserved2; |
| 591 | os->reserved3 = is->reserved3; |
| 592 | |
| 593 | return TRUE; |
| 594 | } |
| 595 | |
| 596 | static const char * |
| 597 | cputype (unsigned long value) |
| 598 | { |
| 599 | switch (value) |
| 600 | { |
| 601 | case BFD_MACH_O_CPU_TYPE_VAX: return "VAX"; |
| 602 | case BFD_MACH_O_CPU_TYPE_MC680x0: return "MC68k"; |
| 603 | case BFD_MACH_O_CPU_TYPE_I386: return "I386"; |
| 604 | case BFD_MACH_O_CPU_TYPE_MIPS: return "MIPS"; |
| 605 | case BFD_MACH_O_CPU_TYPE_MC98000: return "MC98k"; |
| 606 | case BFD_MACH_O_CPU_TYPE_HPPA: return "HPPA"; |
| 607 | case BFD_MACH_O_CPU_TYPE_ARM: return "ARM"; |
| 608 | case BFD_MACH_O_CPU_TYPE_MC88000: return "MC88K"; |
| 609 | case BFD_MACH_O_CPU_TYPE_SPARC: return "SPARC"; |
| 610 | case BFD_MACH_O_CPU_TYPE_I860: return "I860"; |
| 611 | case BFD_MACH_O_CPU_TYPE_ALPHA: return "ALPHA"; |
| 612 | case BFD_MACH_O_CPU_TYPE_POWERPC: return "PPC"; |
| 613 | case BFD_MACH_O_CPU_TYPE_POWERPC_64: return "PPC64"; |
| 614 | case BFD_MACH_O_CPU_TYPE_X86_64: return "X86_64"; |
| 615 | case BFD_MACH_O_CPU_TYPE_ARM64: return "ARM64"; |
| 616 | default: return _("<unknown>"); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | static const char * |
| 621 | cpusubtype (unsigned long cputype, unsigned long cpusubtype) |
| 622 | { |
| 623 | static char buffer[128]; |
| 624 | |
| 625 | buffer[0] = 0; |
| 626 | switch (cpusubtype & BFD_MACH_O_CPU_SUBTYPE_MASK) |
| 627 | { |
| 628 | case 0: |
| 629 | break; |
| 630 | case BFD_MACH_O_CPU_SUBTYPE_LIB64: |
| 631 | sprintf (buffer, " (LIB64)"); break; |
| 632 | default: |
| 633 | sprintf (buffer, _("<unknown mask flags>")); break; |
| 634 | } |
| 635 | |
| 636 | cpusubtype &= ~ BFD_MACH_O_CPU_SUBTYPE_MASK; |
| 637 | |
| 638 | switch (cputype) |
| 639 | { |
| 640 | case BFD_MACH_O_CPU_TYPE_X86_64: |
| 641 | case BFD_MACH_O_CPU_TYPE_I386: |
| 642 | switch (cpusubtype) |
| 643 | { |
| 644 | case BFD_MACH_O_CPU_SUBTYPE_X86_ALL: |
| 645 | return strcat (buffer, " (X86_ALL)"); |
| 646 | default: |
| 647 | break; |
| 648 | } |
| 649 | break; |
| 650 | |
| 651 | case BFD_MACH_O_CPU_TYPE_ARM: |
| 652 | switch (cpusubtype) |
| 653 | { |
| 654 | case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL: |
| 655 | return strcat (buffer, " (ARM_ALL)"); |
| 656 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T: |
| 657 | return strcat (buffer, " (ARM_V4T)"); |
| 658 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V6: |
| 659 | return strcat (buffer, " (ARM_V6)"); |
| 660 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ: |
| 661 | return strcat (buffer, " (ARM_V5TEJ)"); |
| 662 | case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE: |
| 663 | return strcat (buffer, " (ARM_XSCALE)"); |
| 664 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V7: |
| 665 | return strcat (buffer, " (ARM_V7)"); |
| 666 | default: |
| 667 | break; |
| 668 | } |
| 669 | break; |
| 670 | |
| 671 | case BFD_MACH_O_CPU_TYPE_ARM64: |
| 672 | switch (cpusubtype) |
| 673 | { |
| 674 | case BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL: |
| 675 | return strcat (buffer, " (ARM64_ALL)"); |
| 676 | case BFD_MACH_O_CPU_SUBTYPE_ARM64_V8: |
| 677 | return strcat (buffer, " (ARM64_V8)"); |
| 678 | default: |
| 679 | break; |
| 680 | } |
| 681 | break; |
| 682 | |
| 683 | default: |
| 684 | break; |
| 685 | } |
| 686 | |
| 687 | if (cpusubtype != 0) |
| 688 | return strcat (buffer, _(" (<unknown>)")); |
| 689 | |
| 690 | return buffer; |
| 691 | } |
| 692 | |
| 693 | bfd_boolean |
| 694 | bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, void *ptr) |
| 695 | { |
| 696 | FILE * file = (FILE *) ptr; |
| 697 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 698 | |
| 699 | fprintf (file, _(" MACH-O header:\n")); |
| 700 | fprintf (file, _(" magic: %#lx\n"), (long) mdata->header.magic); |
| 701 | fprintf (file, _(" cputype: %#lx (%s)\n"), (long) mdata->header.cputype, |
| 702 | cputype (mdata->header.cputype)); |
| 703 | fprintf (file, _(" cpusubtype: %#lx%s\n"), (long) mdata->header.cpusubtype, |
| 704 | cpusubtype (mdata->header.cputype, mdata->header.cpusubtype)); |
| 705 | fprintf (file, _(" filetype: %#lx\n"), (long) mdata->header.filetype); |
| 706 | fprintf (file, _(" ncmds: %#lx\n"), (long) mdata->header.ncmds); |
| 707 | fprintf (file, _(" sizeocmds: %#lx\n"), (long) mdata->header.sizeofcmds); |
| 708 | fprintf (file, _(" flags: %#lx\n"), (long) mdata->header.flags); |
| 709 | fprintf (file, _(" version: %x\n"), mdata->header.version); |
| 710 | |
| 711 | return TRUE; |
| 712 | } |
| 713 | |
| 714 | /* Copy any private info we understand from the input bfd |
| 715 | to the output bfd. */ |
| 716 | |
| 717 | bfd_boolean |
| 718 | bfd_mach_o_bfd_copy_private_header_data (bfd *ibfd, bfd *obfd) |
| 719 | { |
| 720 | bfd_mach_o_data_struct *imdata; |
| 721 | bfd_mach_o_data_struct *omdata; |
| 722 | bfd_mach_o_load_command *icmd; |
| 723 | |
| 724 | if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour |
| 725 | || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour) |
| 726 | return TRUE; |
| 727 | |
| 728 | BFD_ASSERT (bfd_mach_o_valid (ibfd)); |
| 729 | BFD_ASSERT (bfd_mach_o_valid (obfd)); |
| 730 | |
| 731 | imdata = bfd_mach_o_get_data (ibfd); |
| 732 | omdata = bfd_mach_o_get_data (obfd); |
| 733 | |
| 734 | /* Copy header flags. */ |
| 735 | omdata->header.flags = imdata->header.flags; |
| 736 | |
| 737 | /* PR 23299. Copy the cputype. */ |
| 738 | if (imdata->header.cputype != omdata->header.cputype) |
| 739 | { |
| 740 | if (omdata->header.cputype == 0) |
| 741 | omdata->header.cputype = imdata->header.cputype; |
| 742 | else if (imdata->header.cputype != 0) |
| 743 | /* Urg - what has happened ? */ |
| 744 | _bfd_error_handler (_("incompatible cputypes in mach-o files: %ld vs %ld"), |
| 745 | (long) imdata->header.cputype, |
| 746 | (long) omdata->header.cputype); |
| 747 | } |
| 748 | |
| 749 | /* Copy the cpusubtype. */ |
| 750 | omdata->header.cpusubtype = imdata->header.cpusubtype; |
| 751 | |
| 752 | /* Copy commands. */ |
| 753 | for (icmd = imdata->first_command; icmd != NULL; icmd = icmd->next) |
| 754 | { |
| 755 | bfd_mach_o_load_command *ocmd; |
| 756 | |
| 757 | switch (icmd->type) |
| 758 | { |
| 759 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 760 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 761 | case BFD_MACH_O_LC_DYLD_INFO: |
| 762 | /* Command is copied. */ |
| 763 | ocmd = bfd_alloc (obfd, sizeof (bfd_mach_o_load_command)); |
| 764 | if (ocmd == NULL) |
| 765 | return FALSE; |
| 766 | |
| 767 | /* Copy common fields. */ |
| 768 | ocmd->type = icmd->type; |
| 769 | ocmd->type_required = icmd->type_required; |
| 770 | ocmd->offset = 0; |
| 771 | ocmd->len = icmd->len; |
| 772 | break; |
| 773 | |
| 774 | default: |
| 775 | /* Command is not copied. */ |
| 776 | continue; |
| 777 | break; |
| 778 | } |
| 779 | |
| 780 | switch (icmd->type) |
| 781 | { |
| 782 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 783 | { |
| 784 | bfd_mach_o_dylib_command *idy = &icmd->command.dylib; |
| 785 | bfd_mach_o_dylib_command *ody = &ocmd->command.dylib; |
| 786 | |
| 787 | ody->name_offset = idy->name_offset; |
| 788 | ody->timestamp = idy->timestamp; |
| 789 | ody->current_version = idy->current_version; |
| 790 | ody->compatibility_version = idy->compatibility_version; |
| 791 | ody->name_str = idy->name_str; |
| 792 | } |
| 793 | break; |
| 794 | |
| 795 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 796 | { |
| 797 | bfd_mach_o_dylinker_command *idy = &icmd->command.dylinker; |
| 798 | bfd_mach_o_dylinker_command *ody = &ocmd->command.dylinker; |
| 799 | |
| 800 | ody->name_offset = idy->name_offset; |
| 801 | ody->name_str = idy->name_str; |
| 802 | } |
| 803 | break; |
| 804 | |
| 805 | case BFD_MACH_O_LC_DYLD_INFO: |
| 806 | { |
| 807 | bfd_mach_o_dyld_info_command *idy = &icmd->command.dyld_info; |
| 808 | bfd_mach_o_dyld_info_command *ody = &ocmd->command.dyld_info; |
| 809 | |
| 810 | if (bfd_mach_o_read_dyld_content (ibfd, idy)) |
| 811 | { |
| 812 | ody->rebase_size = idy->rebase_size; |
| 813 | ody->rebase_content = idy->rebase_content; |
| 814 | |
| 815 | ody->bind_size = idy->bind_size; |
| 816 | ody->bind_content = idy->bind_content; |
| 817 | |
| 818 | ody->weak_bind_size = idy->weak_bind_size; |
| 819 | ody->weak_bind_content = idy->weak_bind_content; |
| 820 | |
| 821 | ody->lazy_bind_size = idy->lazy_bind_size; |
| 822 | ody->lazy_bind_content = idy->lazy_bind_content; |
| 823 | |
| 824 | ody->export_size = idy->export_size; |
| 825 | ody->export_content = idy->export_content; |
| 826 | } |
| 827 | /* PR 17512L: file: 730e492d. */ |
| 828 | else |
| 829 | { |
| 830 | ody->rebase_size = |
| 831 | ody->bind_size = |
| 832 | ody->weak_bind_size = |
| 833 | ody->lazy_bind_size = |
| 834 | ody->export_size = 0; |
| 835 | ody->rebase_content = |
| 836 | ody->bind_content = |
| 837 | ody->weak_bind_content = |
| 838 | ody->lazy_bind_content = |
| 839 | ody->export_content = NULL; |
| 840 | } |
| 841 | } |
| 842 | break; |
| 843 | |
| 844 | default: |
| 845 | /* That command should be handled. */ |
| 846 | abort (); |
| 847 | } |
| 848 | |
| 849 | /* Insert command. */ |
| 850 | bfd_mach_o_append_command (obfd, ocmd); |
| 851 | } |
| 852 | |
| 853 | return TRUE; |
| 854 | } |
| 855 | |
| 856 | /* This allows us to set up to 32 bits of flags (unless we invent some |
| 857 | fiendish scheme to subdivide). For now, we'll just set the file flags |
| 858 | without error checking - just overwrite. */ |
| 859 | |
| 860 | bfd_boolean |
| 861 | bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags) |
| 862 | { |
| 863 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 864 | |
| 865 | if (!mdata) |
| 866 | return FALSE; |
| 867 | |
| 868 | mdata->header.flags = flags; |
| 869 | return TRUE; |
| 870 | } |
| 871 | |
| 872 | /* Count the total number of symbols. */ |
| 873 | |
| 874 | static long |
| 875 | bfd_mach_o_count_symbols (bfd *abfd) |
| 876 | { |
| 877 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 878 | |
| 879 | if (mdata->symtab == NULL) |
| 880 | return 0; |
| 881 | return mdata->symtab->nsyms; |
| 882 | } |
| 883 | |
| 884 | long |
| 885 | bfd_mach_o_get_symtab_upper_bound (bfd *abfd) |
| 886 | { |
| 887 | long nsyms = bfd_mach_o_count_symbols (abfd); |
| 888 | |
| 889 | return ((nsyms + 1) * sizeof (asymbol *)); |
| 890 | } |
| 891 | |
| 892 | long |
| 893 | bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
| 894 | { |
| 895 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 896 | long nsyms = bfd_mach_o_count_symbols (abfd); |
| 897 | bfd_mach_o_symtab_command *sym = mdata->symtab; |
| 898 | unsigned long j; |
| 899 | |
| 900 | if (nsyms < 0) |
| 901 | return nsyms; |
| 902 | |
| 903 | if (nsyms == 0) |
| 904 | { |
| 905 | /* Do not try to read symbols if there are none. */ |
| 906 | alocation[0] = NULL; |
| 907 | return 0; |
| 908 | } |
| 909 | |
| 910 | if (!bfd_mach_o_read_symtab_symbols (abfd)) |
| 911 | { |
| 912 | _bfd_error_handler |
| 913 | (_("bfd_mach_o_canonicalize_symtab: unable to load symbols")); |
| 914 | return 0; |
| 915 | } |
| 916 | |
| 917 | BFD_ASSERT (sym->symbols != NULL); |
| 918 | |
| 919 | for (j = 0; j < sym->nsyms; j++) |
| 920 | alocation[j] = &sym->symbols[j].symbol; |
| 921 | |
| 922 | alocation[j] = NULL; |
| 923 | |
| 924 | return nsyms; |
| 925 | } |
| 926 | |
| 927 | /* Create synthetic symbols for indirect symbols. */ |
| 928 | |
| 929 | long |
| 930 | bfd_mach_o_get_synthetic_symtab (bfd *abfd, |
| 931 | long symcount ATTRIBUTE_UNUSED, |
| 932 | asymbol **syms ATTRIBUTE_UNUSED, |
| 933 | long dynsymcount ATTRIBUTE_UNUSED, |
| 934 | asymbol **dynsyms ATTRIBUTE_UNUSED, |
| 935 | asymbol **ret) |
| 936 | { |
| 937 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 938 | bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; |
| 939 | bfd_mach_o_symtab_command *symtab = mdata->symtab; |
| 940 | asymbol *s; |
| 941 | char * s_start; |
| 942 | char * s_end; |
| 943 | unsigned long count, i, j, n; |
| 944 | size_t size; |
| 945 | char *names; |
| 946 | char *nul_name; |
| 947 | const char stub [] = "$stub"; |
| 948 | |
| 949 | *ret = NULL; |
| 950 | |
| 951 | /* Stop now if no symbols or no indirect symbols. */ |
| 952 | if (dysymtab == NULL || dysymtab->nindirectsyms == 0 |
| 953 | || symtab == NULL || symtab->symbols == NULL) |
| 954 | return 0; |
| 955 | |
| 956 | /* We need to allocate a bfd symbol for every indirect symbol and to |
| 957 | allocate the memory for its name. */ |
| 958 | count = dysymtab->nindirectsyms; |
| 959 | size = count * sizeof (asymbol) + 1; |
| 960 | |
| 961 | for (j = 0; j < count; j++) |
| 962 | { |
| 963 | const char * strng; |
| 964 | unsigned int isym = dysymtab->indirect_syms[j]; |
| 965 | |
| 966 | /* Some indirect symbols are anonymous. */ |
| 967 | if (isym < symtab->nsyms && (strng = symtab->symbols[isym].symbol.name)) |
| 968 | /* PR 17512: file: f5b8eeba. */ |
| 969 | size += strnlen (strng, symtab->strsize - (strng - symtab->strtab)) + sizeof (stub); |
| 970 | } |
| 971 | |
| 972 | s_start = bfd_malloc (size); |
| 973 | s = *ret = (asymbol *) s_start; |
| 974 | if (s == NULL) |
| 975 | return -1; |
| 976 | names = (char *) (s + count); |
| 977 | nul_name = names; |
| 978 | *names++ = 0; |
| 979 | s_end = s_start + size; |
| 980 | |
| 981 | n = 0; |
| 982 | for (i = 0; i < mdata->nsects; i++) |
| 983 | { |
| 984 | bfd_mach_o_section *sec = mdata->sections[i]; |
| 985 | unsigned int first, last; |
| 986 | bfd_vma addr; |
| 987 | bfd_vma entry_size; |
| 988 | |
| 989 | switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 990 | { |
| 991 | case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: |
| 992 | case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: |
| 993 | case BFD_MACH_O_S_SYMBOL_STUBS: |
| 994 | /* Only these sections have indirect symbols. */ |
| 995 | first = sec->reserved1; |
| 996 | last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec); |
| 997 | addr = sec->addr; |
| 998 | entry_size = bfd_mach_o_section_get_entry_size (abfd, sec); |
| 999 | |
| 1000 | /* PR 17512: file: 08e15eec. */ |
| 1001 | if (first >= count || last >= count || first > last) |
| 1002 | goto fail; |
| 1003 | |
| 1004 | for (j = first; j < last; j++) |
| 1005 | { |
| 1006 | unsigned int isym = dysymtab->indirect_syms[j]; |
| 1007 | |
| 1008 | /* PR 17512: file: 04d64d9b. */ |
| 1009 | if (((char *) s) + sizeof (* s) > s_end) |
| 1010 | goto fail; |
| 1011 | |
| 1012 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 1013 | s->section = sec->bfdsection; |
| 1014 | s->value = addr - sec->addr; |
| 1015 | s->udata.p = NULL; |
| 1016 | |
| 1017 | if (isym < symtab->nsyms |
| 1018 | && symtab->symbols[isym].symbol.name) |
| 1019 | { |
| 1020 | const char *sym = symtab->symbols[isym].symbol.name; |
| 1021 | size_t len; |
| 1022 | |
| 1023 | s->name = names; |
| 1024 | len = strlen (sym); |
| 1025 | /* PR 17512: file: 47dfd4d2. */ |
| 1026 | if (names + len >= s_end) |
| 1027 | goto fail; |
| 1028 | memcpy (names, sym, len); |
| 1029 | names += len; |
| 1030 | /* PR 17512: file: 18f340a4. */ |
| 1031 | if (names + sizeof (stub) >= s_end) |
| 1032 | goto fail; |
| 1033 | memcpy (names, stub, sizeof (stub)); |
| 1034 | names += sizeof (stub); |
| 1035 | } |
| 1036 | else |
| 1037 | s->name = nul_name; |
| 1038 | |
| 1039 | addr += entry_size; |
| 1040 | s++; |
| 1041 | n++; |
| 1042 | } |
| 1043 | break; |
| 1044 | default: |
| 1045 | break; |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | return n; |
| 1050 | |
| 1051 | fail: |
| 1052 | free (s_start); |
| 1053 | * ret = NULL; |
| 1054 | return -1; |
| 1055 | } |
| 1056 | |
| 1057 | void |
| 1058 | bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, |
| 1059 | asymbol *symbol, |
| 1060 | symbol_info *ret) |
| 1061 | { |
| 1062 | bfd_symbol_info (symbol, ret); |
| 1063 | } |
| 1064 | |
| 1065 | void |
| 1066 | bfd_mach_o_print_symbol (bfd *abfd, |
| 1067 | void * afile, |
| 1068 | asymbol *symbol, |
| 1069 | bfd_print_symbol_type how) |
| 1070 | { |
| 1071 | FILE *file = (FILE *) afile; |
| 1072 | const char *name; |
| 1073 | bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol; |
| 1074 | |
| 1075 | switch (how) |
| 1076 | { |
| 1077 | case bfd_print_symbol_name: |
| 1078 | fprintf (file, "%s", symbol->name); |
| 1079 | break; |
| 1080 | default: |
| 1081 | bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
| 1082 | if (asym->n_type & BFD_MACH_O_N_STAB) |
| 1083 | name = bfd_get_stab_name (asym->n_type); |
| 1084 | else |
| 1085 | switch (asym->n_type & BFD_MACH_O_N_TYPE) |
| 1086 | { |
| 1087 | case BFD_MACH_O_N_UNDF: |
| 1088 | if (symbol->value == 0) |
| 1089 | name = "UND"; |
| 1090 | else |
| 1091 | name = "COM"; |
| 1092 | break; |
| 1093 | case BFD_MACH_O_N_ABS: |
| 1094 | name = "ABS"; |
| 1095 | break; |
| 1096 | case BFD_MACH_O_N_INDR: |
| 1097 | name = "INDR"; |
| 1098 | break; |
| 1099 | case BFD_MACH_O_N_PBUD: |
| 1100 | name = "PBUD"; |
| 1101 | break; |
| 1102 | case BFD_MACH_O_N_SECT: |
| 1103 | name = "SECT"; |
| 1104 | break; |
| 1105 | default: |
| 1106 | name = "???"; |
| 1107 | break; |
| 1108 | } |
| 1109 | if (name == NULL) |
| 1110 | name = ""; |
| 1111 | fprintf (file, " %02x %-6s %02x %04x", |
| 1112 | asym->n_type, name, asym->n_sect, asym->n_desc); |
| 1113 | if ((asym->n_type & BFD_MACH_O_N_STAB) == 0 |
| 1114 | && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
| 1115 | fprintf (file, " [%s]", symbol->section->name); |
| 1116 | fprintf (file, " %s", symbol->name); |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | static void |
| 1121 | bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype, |
| 1122 | bfd_mach_o_cpu_subtype msubtype, |
| 1123 | enum bfd_architecture *type, |
| 1124 | unsigned long *subtype) |
| 1125 | { |
| 1126 | *subtype = bfd_arch_unknown; |
| 1127 | |
| 1128 | switch (mtype) |
| 1129 | { |
| 1130 | case BFD_MACH_O_CPU_TYPE_VAX: |
| 1131 | *type = bfd_arch_vax; |
| 1132 | break; |
| 1133 | case BFD_MACH_O_CPU_TYPE_MC680x0: |
| 1134 | *type = bfd_arch_m68k; |
| 1135 | break; |
| 1136 | case BFD_MACH_O_CPU_TYPE_I386: |
| 1137 | *type = bfd_arch_i386; |
| 1138 | *subtype = bfd_mach_i386_i386; |
| 1139 | break; |
| 1140 | case BFD_MACH_O_CPU_TYPE_X86_64: |
| 1141 | *type = bfd_arch_i386; |
| 1142 | *subtype = bfd_mach_x86_64; |
| 1143 | break; |
| 1144 | case BFD_MACH_O_CPU_TYPE_MIPS: |
| 1145 | *type = bfd_arch_mips; |
| 1146 | break; |
| 1147 | case BFD_MACH_O_CPU_TYPE_MC98000: |
| 1148 | *type = bfd_arch_m98k; |
| 1149 | break; |
| 1150 | case BFD_MACH_O_CPU_TYPE_HPPA: |
| 1151 | *type = bfd_arch_hppa; |
| 1152 | break; |
| 1153 | case BFD_MACH_O_CPU_TYPE_ARM: |
| 1154 | *type = bfd_arch_arm; |
| 1155 | switch (msubtype) |
| 1156 | { |
| 1157 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T: |
| 1158 | *subtype = bfd_mach_arm_4T; |
| 1159 | break; |
| 1160 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V6: |
| 1161 | *subtype = bfd_mach_arm_4T; /* Best fit ? */ |
| 1162 | break; |
| 1163 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ: |
| 1164 | *subtype = bfd_mach_arm_5TE; |
| 1165 | break; |
| 1166 | case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE: |
| 1167 | *subtype = bfd_mach_arm_XScale; |
| 1168 | break; |
| 1169 | case BFD_MACH_O_CPU_SUBTYPE_ARM_V7: |
| 1170 | *subtype = bfd_mach_arm_5TE; /* Best fit ? */ |
| 1171 | break; |
| 1172 | case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL: |
| 1173 | default: |
| 1174 | break; |
| 1175 | } |
| 1176 | break; |
| 1177 | case BFD_MACH_O_CPU_TYPE_SPARC: |
| 1178 | *type = bfd_arch_sparc; |
| 1179 | *subtype = bfd_mach_sparc; |
| 1180 | break; |
| 1181 | case BFD_MACH_O_CPU_TYPE_ALPHA: |
| 1182 | *type = bfd_arch_alpha; |
| 1183 | break; |
| 1184 | case BFD_MACH_O_CPU_TYPE_POWERPC: |
| 1185 | *type = bfd_arch_powerpc; |
| 1186 | *subtype = bfd_mach_ppc; |
| 1187 | break; |
| 1188 | case BFD_MACH_O_CPU_TYPE_POWERPC_64: |
| 1189 | *type = bfd_arch_powerpc; |
| 1190 | *subtype = bfd_mach_ppc64; |
| 1191 | break; |
| 1192 | case BFD_MACH_O_CPU_TYPE_ARM64: |
| 1193 | *type = bfd_arch_aarch64; |
| 1194 | *subtype = bfd_mach_aarch64; |
| 1195 | break; |
| 1196 | default: |
| 1197 | *type = bfd_arch_unknown; |
| 1198 | break; |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | /* Write n NUL bytes to ABFD so that LEN + n is a multiple of 4. Return the |
| 1203 | number of bytes written or -1 in case of error. */ |
| 1204 | |
| 1205 | static int |
| 1206 | bfd_mach_o_pad4 (bfd *abfd, unsigned int len) |
| 1207 | { |
| 1208 | if (len % 4 != 0) |
| 1209 | { |
| 1210 | char pad[4] = {0,0,0,0}; |
| 1211 | unsigned int padlen = 4 - (len % 4); |
| 1212 | |
| 1213 | if (bfd_bwrite (pad, padlen, abfd) != padlen) |
| 1214 | return -1; |
| 1215 | |
| 1216 | return padlen; |
| 1217 | } |
| 1218 | else |
| 1219 | return 0; |
| 1220 | } |
| 1221 | |
| 1222 | /* Likewise, but for a command. */ |
| 1223 | |
| 1224 | static int |
| 1225 | bfd_mach_o_pad_command (bfd *abfd, unsigned int len) |
| 1226 | { |
| 1227 | unsigned int align = bfd_mach_o_wide_p (abfd) ? 8 : 4; |
| 1228 | |
| 1229 | if (len % align != 0) |
| 1230 | { |
| 1231 | char pad[8] = {0}; |
| 1232 | unsigned int padlen = align - (len % align); |
| 1233 | |
| 1234 | if (bfd_bwrite (pad, padlen, abfd) != padlen) |
| 1235 | return -1; |
| 1236 | |
| 1237 | return padlen; |
| 1238 | } |
| 1239 | else |
| 1240 | return 0; |
| 1241 | } |
| 1242 | |
| 1243 | static bfd_boolean |
| 1244 | bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header) |
| 1245 | { |
| 1246 | struct mach_o_header_external raw; |
| 1247 | unsigned int size; |
| 1248 | |
| 1249 | size = mach_o_wide_p (header) ? |
| 1250 | BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; |
| 1251 | |
| 1252 | bfd_h_put_32 (abfd, header->magic, raw.magic); |
| 1253 | bfd_h_put_32 (abfd, header->cputype, raw.cputype); |
| 1254 | bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype); |
| 1255 | bfd_h_put_32 (abfd, header->filetype, raw.filetype); |
| 1256 | bfd_h_put_32 (abfd, header->ncmds, raw.ncmds); |
| 1257 | bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds); |
| 1258 | bfd_h_put_32 (abfd, header->flags, raw.flags); |
| 1259 | |
| 1260 | if (mach_o_wide_p (header)) |
| 1261 | bfd_h_put_32 (abfd, header->reserved, raw.reserved); |
| 1262 | |
| 1263 | if (bfd_seek (abfd, 0, SEEK_SET) != 0 |
| 1264 | || bfd_bwrite (&raw, size, abfd) != size) |
| 1265 | return FALSE; |
| 1266 | |
| 1267 | return TRUE; |
| 1268 | } |
| 1269 | |
| 1270 | static bfd_boolean |
| 1271 | bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command) |
| 1272 | { |
| 1273 | bfd_mach_o_thread_command *cmd = &command->command.thread; |
| 1274 | unsigned int i; |
| 1275 | struct mach_o_thread_command_external raw; |
| 1276 | unsigned int offset; |
| 1277 | |
| 1278 | BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) |
| 1279 | || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); |
| 1280 | |
| 1281 | offset = BFD_MACH_O_LC_SIZE; |
| 1282 | for (i = 0; i < cmd->nflavours; i++) |
| 1283 | { |
| 1284 | BFD_ASSERT ((cmd->flavours[i].size % 4) == 0); |
| 1285 | BFD_ASSERT (cmd->flavours[i].offset == |
| 1286 | (command->offset + offset + BFD_MACH_O_LC_SIZE)); |
| 1287 | |
| 1288 | bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour); |
| 1289 | bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count); |
| 1290 | |
| 1291 | if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 |
| 1292 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1293 | return FALSE; |
| 1294 | |
| 1295 | offset += cmd->flavours[i].size + sizeof (raw); |
| 1296 | } |
| 1297 | |
| 1298 | return TRUE; |
| 1299 | } |
| 1300 | |
| 1301 | static bfd_boolean |
| 1302 | bfd_mach_o_write_dylinker (bfd *abfd, bfd_mach_o_load_command *command) |
| 1303 | { |
| 1304 | bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; |
| 1305 | struct mach_o_str_command_external raw; |
| 1306 | unsigned int namelen; |
| 1307 | |
| 1308 | bfd_h_put_32 (abfd, cmd->name_offset, raw.str); |
| 1309 | |
| 1310 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1311 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1312 | return FALSE; |
| 1313 | |
| 1314 | namelen = strlen (cmd->name_str) + 1; |
| 1315 | if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) |
| 1316 | return FALSE; |
| 1317 | |
| 1318 | if (bfd_mach_o_pad_command (abfd, namelen) < 0) |
| 1319 | return FALSE; |
| 1320 | |
| 1321 | return TRUE; |
| 1322 | } |
| 1323 | |
| 1324 | static bfd_boolean |
| 1325 | bfd_mach_o_write_dylib (bfd *abfd, bfd_mach_o_load_command *command) |
| 1326 | { |
| 1327 | bfd_mach_o_dylib_command *cmd = &command->command.dylib; |
| 1328 | struct mach_o_dylib_command_external raw; |
| 1329 | unsigned int namelen; |
| 1330 | |
| 1331 | bfd_h_put_32 (abfd, cmd->name_offset, raw.name); |
| 1332 | bfd_h_put_32 (abfd, cmd->timestamp, raw.timestamp); |
| 1333 | bfd_h_put_32 (abfd, cmd->current_version, raw.current_version); |
| 1334 | bfd_h_put_32 (abfd, cmd->compatibility_version, raw.compatibility_version); |
| 1335 | |
| 1336 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1337 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1338 | return FALSE; |
| 1339 | |
| 1340 | namelen = strlen (cmd->name_str) + 1; |
| 1341 | if (bfd_bwrite (cmd->name_str, namelen, abfd) != namelen) |
| 1342 | return FALSE; |
| 1343 | |
| 1344 | if (bfd_mach_o_pad_command (abfd, namelen) < 0) |
| 1345 | return FALSE; |
| 1346 | |
| 1347 | return TRUE; |
| 1348 | } |
| 1349 | |
| 1350 | static bfd_boolean |
| 1351 | bfd_mach_o_write_main (bfd *abfd, bfd_mach_o_load_command *command) |
| 1352 | { |
| 1353 | bfd_mach_o_main_command *cmd = &command->command.main; |
| 1354 | struct mach_o_entry_point_command_external raw; |
| 1355 | |
| 1356 | bfd_h_put_64 (abfd, cmd->entryoff, raw.entryoff); |
| 1357 | bfd_h_put_64 (abfd, cmd->stacksize, raw.stacksize); |
| 1358 | |
| 1359 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1360 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1361 | return FALSE; |
| 1362 | |
| 1363 | return TRUE; |
| 1364 | } |
| 1365 | |
| 1366 | static bfd_boolean |
| 1367 | bfd_mach_o_write_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) |
| 1368 | { |
| 1369 | bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; |
| 1370 | struct mach_o_dyld_info_command_external raw; |
| 1371 | |
| 1372 | bfd_h_put_32 (abfd, cmd->rebase_off, raw.rebase_off); |
| 1373 | bfd_h_put_32 (abfd, cmd->rebase_size, raw.rebase_size); |
| 1374 | bfd_h_put_32 (abfd, cmd->bind_off, raw.bind_off); |
| 1375 | bfd_h_put_32 (abfd, cmd->bind_size, raw.bind_size); |
| 1376 | bfd_h_put_32 (abfd, cmd->weak_bind_off, raw.weak_bind_off); |
| 1377 | bfd_h_put_32 (abfd, cmd->weak_bind_size, raw.weak_bind_size); |
| 1378 | bfd_h_put_32 (abfd, cmd->lazy_bind_off, raw.lazy_bind_off); |
| 1379 | bfd_h_put_32 (abfd, cmd->lazy_bind_size, raw.lazy_bind_size); |
| 1380 | bfd_h_put_32 (abfd, cmd->export_off, raw.export_off); |
| 1381 | bfd_h_put_32 (abfd, cmd->export_size, raw.export_size); |
| 1382 | |
| 1383 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1384 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1385 | return FALSE; |
| 1386 | |
| 1387 | if (cmd->rebase_size != 0) |
| 1388 | if (bfd_seek (abfd, cmd->rebase_off, SEEK_SET) != 0 |
| 1389 | || (bfd_bwrite (cmd->rebase_content, cmd->rebase_size, abfd) != |
| 1390 | cmd->rebase_size)) |
| 1391 | return FALSE; |
| 1392 | |
| 1393 | if (cmd->bind_size != 0) |
| 1394 | if (bfd_seek (abfd, cmd->bind_off, SEEK_SET) != 0 |
| 1395 | || (bfd_bwrite (cmd->bind_content, cmd->bind_size, abfd) != |
| 1396 | cmd->bind_size)) |
| 1397 | return FALSE; |
| 1398 | |
| 1399 | if (cmd->weak_bind_size != 0) |
| 1400 | if (bfd_seek (abfd, cmd->weak_bind_off, SEEK_SET) != 0 |
| 1401 | || (bfd_bwrite (cmd->weak_bind_content, cmd->weak_bind_size, abfd) != |
| 1402 | cmd->weak_bind_size)) |
| 1403 | return FALSE; |
| 1404 | |
| 1405 | if (cmd->lazy_bind_size != 0) |
| 1406 | if (bfd_seek (abfd, cmd->lazy_bind_off, SEEK_SET) != 0 |
| 1407 | || (bfd_bwrite (cmd->lazy_bind_content, cmd->lazy_bind_size, abfd) != |
| 1408 | cmd->lazy_bind_size)) |
| 1409 | return FALSE; |
| 1410 | |
| 1411 | if (cmd->export_size != 0) |
| 1412 | if (bfd_seek (abfd, cmd->export_off, SEEK_SET) != 0 |
| 1413 | || (bfd_bwrite (cmd->export_content, cmd->export_size, abfd) != |
| 1414 | cmd->export_size)) |
| 1415 | return FALSE; |
| 1416 | |
| 1417 | return TRUE; |
| 1418 | } |
| 1419 | |
| 1420 | long |
| 1421 | bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, |
| 1422 | asection *asect) |
| 1423 | { |
| 1424 | #if SIZEOF_LONG == SIZEOF_INT |
| 1425 | if (asect->reloc_count >= LONG_MAX / sizeof (arelent *)) |
| 1426 | { |
| 1427 | bfd_set_error (bfd_error_file_too_big); |
| 1428 | return -1; |
| 1429 | } |
| 1430 | #endif |
| 1431 | return (asect->reloc_count + 1) * sizeof (arelent *); |
| 1432 | } |
| 1433 | |
| 1434 | /* In addition to the need to byte-swap the symbol number, the bit positions |
| 1435 | of the fields in the relocation information vary per target endian-ness. */ |
| 1436 | |
| 1437 | void |
| 1438 | bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel, |
| 1439 | unsigned char *fields) |
| 1440 | { |
| 1441 | unsigned char info = fields[3]; |
| 1442 | |
| 1443 | if (bfd_big_endian (abfd)) |
| 1444 | { |
| 1445 | rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2]; |
| 1446 | rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; |
| 1447 | rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0; |
| 1448 | rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT) |
| 1449 | & BFD_MACH_O_LENGTH_MASK; |
| 1450 | rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0; |
| 1451 | } |
| 1452 | else |
| 1453 | { |
| 1454 | rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0]; |
| 1455 | rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK; |
| 1456 | rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0; |
| 1457 | rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT) |
| 1458 | & BFD_MACH_O_LENGTH_MASK; |
| 1459 | rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0; |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | /* Set syms_ptr_ptr and addend of RES. */ |
| 1464 | |
| 1465 | bfd_boolean |
| 1466 | bfd_mach_o_canonicalize_non_scattered_reloc (bfd *abfd, |
| 1467 | bfd_mach_o_reloc_info *reloc, |
| 1468 | arelent *res, asymbol **syms) |
| 1469 | { |
| 1470 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 1471 | unsigned int num; |
| 1472 | asymbol **sym; |
| 1473 | |
| 1474 | /* Non-scattered relocation. */ |
| 1475 | reloc->r_scattered = 0; |
| 1476 | res->addend = 0; |
| 1477 | |
| 1478 | num = reloc->r_value; |
| 1479 | |
| 1480 | if (reloc->r_extern) |
| 1481 | { |
| 1482 | /* PR 17512: file: 8396-1185-0.004. */ |
| 1483 | if (num >= (unsigned) bfd_mach_o_count_symbols (abfd)) |
| 1484 | sym = bfd_und_section_ptr->symbol_ptr_ptr; |
| 1485 | else if (syms == NULL) |
| 1486 | sym = bfd_und_section_ptr->symbol_ptr_ptr; |
| 1487 | else |
| 1488 | /* An external symbol number. */ |
| 1489 | sym = syms + num; |
| 1490 | } |
| 1491 | else if (num == 0x00ffffff || num == 0) |
| 1492 | { |
| 1493 | /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this |
| 1494 | is generic code, we don't know wether this is really a PAIR. |
| 1495 | This value is almost certainly not a valid section number, hence |
| 1496 | this specific case to avoid an assertion failure. |
| 1497 | Target specific swap_reloc_in routine should adjust that. */ |
| 1498 | sym = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 1499 | } |
| 1500 | else |
| 1501 | { |
| 1502 | /* PR 17512: file: 006-2964-0.004. */ |
| 1503 | if (num > mdata->nsects) |
| 1504 | return FALSE; |
| 1505 | |
| 1506 | /* A section number. */ |
| 1507 | sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr; |
| 1508 | /* For a symbol defined in section S, the addend (stored in the |
| 1509 | binary) contains the address of the section. To comply with |
| 1510 | bfd convention, subtract the section address. |
| 1511 | Use the address from the header, so that the user can modify |
| 1512 | the vma of the section. */ |
| 1513 | res->addend = -mdata->sections[num - 1]->addr; |
| 1514 | } |
| 1515 | |
| 1516 | /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset |
| 1517 | in the lower 16bits of the address value. So we have to find the |
| 1518 | 'symbol' from the preceding reloc. We do this even though the |
| 1519 | section symbol is probably not needed here, because NULL symbol |
| 1520 | values cause an assert in generic BFD code. This must be done in |
| 1521 | the PPC swap_reloc_in routine. */ |
| 1522 | res->sym_ptr_ptr = sym; |
| 1523 | |
| 1524 | return TRUE; |
| 1525 | } |
| 1526 | |
| 1527 | /* Do most of the work for canonicalize_relocs on RAW: create internal |
| 1528 | representation RELOC and set most fields of RES using symbol table SYMS. |
| 1529 | Each target still has to set the howto of RES and possibly adjust other |
| 1530 | fields. |
| 1531 | Previously the Mach-O hook point was simply swap_in, but some targets |
| 1532 | (like arm64) don't follow the generic rules (symnum is a value for the |
| 1533 | non-scattered relocation ADDEND). */ |
| 1534 | |
| 1535 | bfd_boolean |
| 1536 | bfd_mach_o_pre_canonicalize_one_reloc (bfd *abfd, |
| 1537 | struct mach_o_reloc_info_external *raw, |
| 1538 | bfd_mach_o_reloc_info *reloc, |
| 1539 | arelent *res, asymbol **syms) |
| 1540 | { |
| 1541 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 1542 | bfd_vma addr; |
| 1543 | |
| 1544 | addr = bfd_get_32 (abfd, raw->r_address); |
| 1545 | res->sym_ptr_ptr = NULL; |
| 1546 | res->addend = 0; |
| 1547 | |
| 1548 | if (addr & BFD_MACH_O_SR_SCATTERED) |
| 1549 | { |
| 1550 | unsigned int j; |
| 1551 | bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum); |
| 1552 | |
| 1553 | /* Scattered relocation, can't be extern. */ |
| 1554 | reloc->r_scattered = 1; |
| 1555 | reloc->r_extern = 0; |
| 1556 | |
| 1557 | /* Extract section and offset from r_value (symnum). */ |
| 1558 | reloc->r_value = symnum; |
| 1559 | /* FIXME: This breaks when a symbol in a reloc exactly follows the |
| 1560 | end of the data for the section (e.g. in a calculation of section |
| 1561 | data length). At present, the symbol will end up associated with |
| 1562 | the following section or, if it falls within alignment padding, as |
| 1563 | null - which will assert later. */ |
| 1564 | for (j = 0; j < mdata->nsects; j++) |
| 1565 | { |
| 1566 | bfd_mach_o_section *sect = mdata->sections[j]; |
| 1567 | if (symnum >= sect->addr && symnum < sect->addr + sect->size) |
| 1568 | { |
| 1569 | res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr; |
| 1570 | res->addend = symnum - sect->addr; |
| 1571 | break; |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | /* Extract the info and address fields from r_address. */ |
| 1576 | reloc->r_type = BFD_MACH_O_GET_SR_TYPE (addr); |
| 1577 | reloc->r_length = BFD_MACH_O_GET_SR_LENGTH (addr); |
| 1578 | reloc->r_pcrel = addr & BFD_MACH_O_SR_PCREL; |
| 1579 | reloc->r_address = BFD_MACH_O_GET_SR_TYPE (addr); |
| 1580 | res->address = BFD_MACH_O_GET_SR_ADDRESS (addr); |
| 1581 | } |
| 1582 | else |
| 1583 | { |
| 1584 | /* Non-scattered relocation. */ |
| 1585 | reloc->r_scattered = 0; |
| 1586 | reloc->r_address = addr; |
| 1587 | res->address = addr; |
| 1588 | |
| 1589 | /* The value and info fields have to be extracted dependent on target |
| 1590 | endian-ness. */ |
| 1591 | bfd_mach_o_swap_in_non_scattered_reloc (abfd, reloc, raw->r_symbolnum); |
| 1592 | |
| 1593 | if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, reloc, |
| 1594 | res, syms)) |
| 1595 | return FALSE; |
| 1596 | } |
| 1597 | |
| 1598 | /* We have set up a reloc with all the information present, so the swapper |
| 1599 | can modify address, value and addend fields, if necessary, to convey |
| 1600 | information in the generic BFD reloc that is mach-o specific. */ |
| 1601 | |
| 1602 | return TRUE; |
| 1603 | } |
| 1604 | |
| 1605 | static int |
| 1606 | bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos, |
| 1607 | unsigned long count, |
| 1608 | arelent *res, asymbol **syms) |
| 1609 | { |
| 1610 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 1611 | unsigned long i; |
| 1612 | struct mach_o_reloc_info_external *native_relocs; |
| 1613 | bfd_size_type native_size; |
| 1614 | |
| 1615 | /* Allocate and read relocs. */ |
| 1616 | native_size = count * BFD_MACH_O_RELENT_SIZE; |
| 1617 | |
| 1618 | /* PR 17512: file: 09477b57. */ |
| 1619 | if (native_size < count) |
| 1620 | return -1; |
| 1621 | |
| 1622 | native_relocs = |
| 1623 | (struct mach_o_reloc_info_external *) bfd_malloc (native_size); |
| 1624 | if (native_relocs == NULL) |
| 1625 | return -1; |
| 1626 | |
| 1627 | if (bfd_seek (abfd, filepos, SEEK_SET) != 0 |
| 1628 | || bfd_bread (native_relocs, native_size, abfd) != native_size) |
| 1629 | goto err; |
| 1630 | |
| 1631 | for (i = 0; i < count; i++) |
| 1632 | { |
| 1633 | if (!(*bed->_bfd_mach_o_canonicalize_one_reloc)(abfd, &native_relocs[i], |
| 1634 | &res[i], syms, res)) |
| 1635 | goto err; |
| 1636 | } |
| 1637 | free (native_relocs); |
| 1638 | return i; |
| 1639 | err: |
| 1640 | free (native_relocs); |
| 1641 | return -1; |
| 1642 | } |
| 1643 | |
| 1644 | long |
| 1645 | bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect, |
| 1646 | arelent **rels, asymbol **syms) |
| 1647 | { |
| 1648 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 1649 | unsigned long i; |
| 1650 | arelent *res; |
| 1651 | |
| 1652 | if (asect->reloc_count == 0) |
| 1653 | return 0; |
| 1654 | |
| 1655 | /* No need to go further if we don't know how to read relocs. */ |
| 1656 | if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) |
| 1657 | return 0; |
| 1658 | |
| 1659 | if (asect->relocation == NULL) |
| 1660 | { |
| 1661 | if (asect->reloc_count * sizeof (arelent) < asect->reloc_count) |
| 1662 | return -1; |
| 1663 | res = bfd_malloc (asect->reloc_count * sizeof (arelent)); |
| 1664 | if (res == NULL) |
| 1665 | return -1; |
| 1666 | |
| 1667 | if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos, |
| 1668 | asect->reloc_count, res, syms) < 0) |
| 1669 | { |
| 1670 | free (res); |
| 1671 | return -1; |
| 1672 | } |
| 1673 | asect->relocation = res; |
| 1674 | } |
| 1675 | |
| 1676 | res = asect->relocation; |
| 1677 | for (i = 0; i < asect->reloc_count; i++) |
| 1678 | rels[i] = &res[i]; |
| 1679 | rels[i] = NULL; |
| 1680 | |
| 1681 | return i; |
| 1682 | } |
| 1683 | |
| 1684 | long |
| 1685 | bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd) |
| 1686 | { |
| 1687 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 1688 | |
| 1689 | if (mdata->dysymtab == NULL) |
| 1690 | return 1; |
| 1691 | return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1) |
| 1692 | * sizeof (arelent *); |
| 1693 | } |
| 1694 | |
| 1695 | long |
| 1696 | bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels, |
| 1697 | struct bfd_symbol **syms) |
| 1698 | { |
| 1699 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 1700 | bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; |
| 1701 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 1702 | unsigned long i; |
| 1703 | arelent *res; |
| 1704 | |
| 1705 | if (dysymtab == NULL) |
| 1706 | return 0; |
| 1707 | if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0) |
| 1708 | return 0; |
| 1709 | |
| 1710 | /* No need to go further if we don't know how to read relocs. */ |
| 1711 | if (bed->_bfd_mach_o_canonicalize_one_reloc == NULL) |
| 1712 | return 0; |
| 1713 | |
| 1714 | if (mdata->dyn_reloc_cache == NULL) |
| 1715 | { |
| 1716 | if ((dysymtab->nextrel + dysymtab->nlocrel) * sizeof (arelent) |
| 1717 | < (dysymtab->nextrel + dysymtab->nlocrel)) |
| 1718 | return -1; |
| 1719 | |
| 1720 | res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel) |
| 1721 | * sizeof (arelent)); |
| 1722 | if (res == NULL) |
| 1723 | return -1; |
| 1724 | |
| 1725 | if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff, |
| 1726 | dysymtab->nextrel, res, syms) < 0) |
| 1727 | { |
| 1728 | free (res); |
| 1729 | return -1; |
| 1730 | } |
| 1731 | |
| 1732 | if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff, |
| 1733 | dysymtab->nlocrel, |
| 1734 | res + dysymtab->nextrel, syms) < 0) |
| 1735 | { |
| 1736 | free (res); |
| 1737 | return -1; |
| 1738 | } |
| 1739 | |
| 1740 | mdata->dyn_reloc_cache = res; |
| 1741 | } |
| 1742 | |
| 1743 | res = mdata->dyn_reloc_cache; |
| 1744 | for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++) |
| 1745 | rels[i] = &res[i]; |
| 1746 | rels[i] = NULL; |
| 1747 | return i; |
| 1748 | } |
| 1749 | |
| 1750 | /* In addition to the need to byte-swap the symbol number, the bit positions |
| 1751 | of the fields in the relocation information vary per target endian-ness. */ |
| 1752 | |
| 1753 | static void |
| 1754 | bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields, |
| 1755 | bfd_mach_o_reloc_info *rel) |
| 1756 | { |
| 1757 | unsigned char info = 0; |
| 1758 | |
| 1759 | BFD_ASSERT (rel->r_type <= 15); |
| 1760 | BFD_ASSERT (rel->r_length <= 3); |
| 1761 | |
| 1762 | if (bfd_big_endian (abfd)) |
| 1763 | { |
| 1764 | fields[0] = (rel->r_value >> 16) & 0xff; |
| 1765 | fields[1] = (rel->r_value >> 8) & 0xff; |
| 1766 | fields[2] = rel->r_value & 0xff; |
| 1767 | info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT; |
| 1768 | info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0; |
| 1769 | info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT; |
| 1770 | info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0; |
| 1771 | } |
| 1772 | else |
| 1773 | { |
| 1774 | fields[2] = (rel->r_value >> 16) & 0xff; |
| 1775 | fields[1] = (rel->r_value >> 8) & 0xff; |
| 1776 | fields[0] = rel->r_value & 0xff; |
| 1777 | info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT; |
| 1778 | info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0; |
| 1779 | info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT; |
| 1780 | info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0; |
| 1781 | } |
| 1782 | fields[3] = info; |
| 1783 | } |
| 1784 | |
| 1785 | static bfd_boolean |
| 1786 | bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section) |
| 1787 | { |
| 1788 | unsigned int i; |
| 1789 | arelent **entries; |
| 1790 | asection *sec; |
| 1791 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 1792 | |
| 1793 | sec = section->bfdsection; |
| 1794 | if (sec->reloc_count == 0) |
| 1795 | return TRUE; |
| 1796 | |
| 1797 | if (bed->_bfd_mach_o_swap_reloc_out == NULL) |
| 1798 | return TRUE; |
| 1799 | |
| 1800 | if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0) |
| 1801 | return FALSE; |
| 1802 | |
| 1803 | /* Convert and write. */ |
| 1804 | entries = section->bfdsection->orelocation; |
| 1805 | for (i = 0; i < section->nreloc; i++) |
| 1806 | { |
| 1807 | arelent *rel = entries[i]; |
| 1808 | struct mach_o_reloc_info_external raw; |
| 1809 | bfd_mach_o_reloc_info info, *pinfo = &info; |
| 1810 | |
| 1811 | /* Convert relocation to an intermediate representation. */ |
| 1812 | if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo)) |
| 1813 | return FALSE; |
| 1814 | |
| 1815 | /* Lower the relocation info. */ |
| 1816 | if (pinfo->r_scattered) |
| 1817 | { |
| 1818 | unsigned long v; |
| 1819 | |
| 1820 | v = BFD_MACH_O_SR_SCATTERED |
| 1821 | | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0) |
| 1822 | | BFD_MACH_O_SET_SR_LENGTH (pinfo->r_length) |
| 1823 | | BFD_MACH_O_SET_SR_TYPE (pinfo->r_type) |
| 1824 | | BFD_MACH_O_SET_SR_ADDRESS (pinfo->r_address); |
| 1825 | /* Note: scattered relocs have field in reverse order... */ |
| 1826 | bfd_put_32 (abfd, v, raw.r_address); |
| 1827 | bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum); |
| 1828 | } |
| 1829 | else |
| 1830 | { |
| 1831 | bfd_put_32 (abfd, pinfo->r_address, raw.r_address); |
| 1832 | bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum, |
| 1833 | pinfo); |
| 1834 | } |
| 1835 | |
| 1836 | if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd) |
| 1837 | != BFD_MACH_O_RELENT_SIZE) |
| 1838 | return FALSE; |
| 1839 | } |
| 1840 | return TRUE; |
| 1841 | } |
| 1842 | |
| 1843 | static bfd_boolean |
| 1844 | bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section) |
| 1845 | { |
| 1846 | struct mach_o_section_32_external raw; |
| 1847 | |
| 1848 | memcpy (raw.sectname, section->sectname, 16); |
| 1849 | memcpy (raw.segname, section->segname, 16); |
| 1850 | bfd_h_put_32 (abfd, section->addr, raw.addr); |
| 1851 | bfd_h_put_32 (abfd, section->size, raw.size); |
| 1852 | bfd_h_put_32 (abfd, section->offset, raw.offset); |
| 1853 | bfd_h_put_32 (abfd, section->align, raw.align); |
| 1854 | bfd_h_put_32 (abfd, section->reloff, raw.reloff); |
| 1855 | bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); |
| 1856 | bfd_h_put_32 (abfd, section->flags, raw.flags); |
| 1857 | bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); |
| 1858 | bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); |
| 1859 | |
| 1860 | if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd) |
| 1861 | != BFD_MACH_O_SECTION_SIZE) |
| 1862 | return FALSE; |
| 1863 | |
| 1864 | return TRUE; |
| 1865 | } |
| 1866 | |
| 1867 | static bfd_boolean |
| 1868 | bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section) |
| 1869 | { |
| 1870 | struct mach_o_section_64_external raw; |
| 1871 | |
| 1872 | memcpy (raw.sectname, section->sectname, 16); |
| 1873 | memcpy (raw.segname, section->segname, 16); |
| 1874 | bfd_h_put_64 (abfd, section->addr, raw.addr); |
| 1875 | bfd_h_put_64 (abfd, section->size, raw.size); |
| 1876 | bfd_h_put_32 (abfd, section->offset, raw.offset); |
| 1877 | bfd_h_put_32 (abfd, section->align, raw.align); |
| 1878 | bfd_h_put_32 (abfd, section->reloff, raw.reloff); |
| 1879 | bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); |
| 1880 | bfd_h_put_32 (abfd, section->flags, raw.flags); |
| 1881 | bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); |
| 1882 | bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); |
| 1883 | bfd_h_put_32 (abfd, section->reserved3, raw.reserved3); |
| 1884 | |
| 1885 | if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) |
| 1886 | != BFD_MACH_O_SECTION_64_SIZE) |
| 1887 | return FALSE; |
| 1888 | |
| 1889 | return TRUE; |
| 1890 | } |
| 1891 | |
| 1892 | static bfd_boolean |
| 1893 | bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) |
| 1894 | { |
| 1895 | struct mach_o_segment_command_32_external raw; |
| 1896 | bfd_mach_o_segment_command *seg = &command->command.segment; |
| 1897 | bfd_mach_o_section *sec; |
| 1898 | |
| 1899 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); |
| 1900 | |
| 1901 | for (sec = seg->sect_head; sec != NULL; sec = sec->next) |
| 1902 | if (!bfd_mach_o_write_relocs (abfd, sec)) |
| 1903 | return FALSE; |
| 1904 | |
| 1905 | memcpy (raw.segname, seg->segname, 16); |
| 1906 | bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr); |
| 1907 | bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize); |
| 1908 | bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff); |
| 1909 | bfd_h_put_32 (abfd, seg->filesize, raw.filesize); |
| 1910 | bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); |
| 1911 | bfd_h_put_32 (abfd, seg->initprot, raw.initprot); |
| 1912 | bfd_h_put_32 (abfd, seg->nsects, raw.nsects); |
| 1913 | bfd_h_put_32 (abfd, seg->flags, raw.flags); |
| 1914 | |
| 1915 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1916 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1917 | return FALSE; |
| 1918 | |
| 1919 | for (sec = seg->sect_head; sec != NULL; sec = sec->next) |
| 1920 | if (!bfd_mach_o_write_section_32 (abfd, sec)) |
| 1921 | return FALSE; |
| 1922 | |
| 1923 | return TRUE; |
| 1924 | } |
| 1925 | |
| 1926 | static bfd_boolean |
| 1927 | bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) |
| 1928 | { |
| 1929 | struct mach_o_segment_command_64_external raw; |
| 1930 | bfd_mach_o_segment_command *seg = &command->command.segment; |
| 1931 | bfd_mach_o_section *sec; |
| 1932 | |
| 1933 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); |
| 1934 | |
| 1935 | for (sec = seg->sect_head; sec != NULL; sec = sec->next) |
| 1936 | if (!bfd_mach_o_write_relocs (abfd, sec)) |
| 1937 | return FALSE; |
| 1938 | |
| 1939 | memcpy (raw.segname, seg->segname, 16); |
| 1940 | bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr); |
| 1941 | bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize); |
| 1942 | bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff); |
| 1943 | bfd_h_put_64 (abfd, seg->filesize, raw.filesize); |
| 1944 | bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); |
| 1945 | bfd_h_put_32 (abfd, seg->initprot, raw.initprot); |
| 1946 | bfd_h_put_32 (abfd, seg->nsects, raw.nsects); |
| 1947 | bfd_h_put_32 (abfd, seg->flags, raw.flags); |
| 1948 | |
| 1949 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 1950 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 1951 | return FALSE; |
| 1952 | |
| 1953 | for (sec = seg->sect_head; sec != NULL; sec = sec->next) |
| 1954 | if (!bfd_mach_o_write_section_64 (abfd, sec)) |
| 1955 | return FALSE; |
| 1956 | |
| 1957 | return TRUE; |
| 1958 | } |
| 1959 | |
| 1960 | static bfd_boolean |
| 1961 | bfd_mach_o_write_symtab_content (bfd *abfd, bfd_mach_o_symtab_command *sym) |
| 1962 | { |
| 1963 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 1964 | unsigned long i; |
| 1965 | unsigned int wide = bfd_mach_o_wide_p (abfd); |
| 1966 | struct bfd_strtab_hash *strtab; |
| 1967 | asymbol **symbols = bfd_get_outsymbols (abfd); |
| 1968 | int padlen; |
| 1969 | |
| 1970 | /* Write the symbols first. */ |
| 1971 | if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0) |
| 1972 | return FALSE; |
| 1973 | |
| 1974 | strtab = _bfd_stringtab_init (); |
| 1975 | if (strtab == NULL) |
| 1976 | return FALSE; |
| 1977 | |
| 1978 | if (sym->nsyms > 0) |
| 1979 | /* Although we don't strictly need to do this, for compatibility with |
| 1980 | Darwin system tools, actually output an empty string for the index |
| 1981 | 0 entry. */ |
| 1982 | _bfd_stringtab_add (strtab, "", TRUE, FALSE); |
| 1983 | |
| 1984 | for (i = 0; i < sym->nsyms; i++) |
| 1985 | { |
| 1986 | bfd_size_type str_index; |
| 1987 | bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; |
| 1988 | |
| 1989 | if (s->symbol.name == 0 || s->symbol.name[0] == '\0') |
| 1990 | /* An index of 0 always means the empty string. */ |
| 1991 | str_index = 0; |
| 1992 | else |
| 1993 | { |
| 1994 | str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE); |
| 1995 | |
| 1996 | if (str_index == (bfd_size_type) -1) |
| 1997 | goto err; |
| 1998 | } |
| 1999 | |
| 2000 | if (wide) |
| 2001 | { |
| 2002 | struct mach_o_nlist_64_external raw; |
| 2003 | |
| 2004 | bfd_h_put_32 (abfd, str_index, raw.n_strx); |
| 2005 | bfd_h_put_8 (abfd, s->n_type, raw.n_type); |
| 2006 | bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); |
| 2007 | bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); |
| 2008 | bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value, |
| 2009 | raw.n_value); |
| 2010 | |
| 2011 | if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2012 | goto err; |
| 2013 | } |
| 2014 | else |
| 2015 | { |
| 2016 | struct mach_o_nlist_external raw; |
| 2017 | |
| 2018 | bfd_h_put_32 (abfd, str_index, raw.n_strx); |
| 2019 | bfd_h_put_8 (abfd, s->n_type, raw.n_type); |
| 2020 | bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); |
| 2021 | bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); |
| 2022 | bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value, |
| 2023 | raw.n_value); |
| 2024 | |
| 2025 | if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2026 | goto err; |
| 2027 | } |
| 2028 | } |
| 2029 | sym->strsize = _bfd_stringtab_size (strtab); |
| 2030 | sym->stroff = mdata->filelen; |
| 2031 | mdata->filelen += sym->strsize; |
| 2032 | |
| 2033 | if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0) |
| 2034 | goto err; |
| 2035 | |
| 2036 | if (!_bfd_stringtab_emit (abfd, strtab)) |
| 2037 | goto err; |
| 2038 | |
| 2039 | /* Pad string table. */ |
| 2040 | padlen = bfd_mach_o_pad4 (abfd, sym->strsize); |
| 2041 | if (padlen < 0) |
| 2042 | return FALSE; |
| 2043 | mdata->filelen += padlen; |
| 2044 | sym->strsize += padlen; |
| 2045 | |
| 2046 | return TRUE; |
| 2047 | |
| 2048 | err: |
| 2049 | _bfd_stringtab_free (strtab); |
| 2050 | sym->strsize = 0; |
| 2051 | return FALSE; |
| 2052 | } |
| 2053 | |
| 2054 | static bfd_boolean |
| 2055 | bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command) |
| 2056 | { |
| 2057 | bfd_mach_o_symtab_command *sym = &command->command.symtab; |
| 2058 | struct mach_o_symtab_command_external raw; |
| 2059 | |
| 2060 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); |
| 2061 | |
| 2062 | /* The command. */ |
| 2063 | bfd_h_put_32 (abfd, sym->symoff, raw.symoff); |
| 2064 | bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms); |
| 2065 | bfd_h_put_32 (abfd, sym->stroff, raw.stroff); |
| 2066 | bfd_h_put_32 (abfd, sym->strsize, raw.strsize); |
| 2067 | |
| 2068 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 |
| 2069 | || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2070 | return FALSE; |
| 2071 | |
| 2072 | return TRUE; |
| 2073 | } |
| 2074 | |
| 2075 | /* Count the number of indirect symbols in the image. |
| 2076 | Requires that the sections are in their final order. */ |
| 2077 | |
| 2078 | static unsigned int |
| 2079 | bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata) |
| 2080 | { |
| 2081 | unsigned int i; |
| 2082 | unsigned int nisyms = 0; |
| 2083 | |
| 2084 | for (i = 0; i < mdata->nsects; ++i) |
| 2085 | { |
| 2086 | bfd_mach_o_section *sec = mdata->sections[i]; |
| 2087 | |
| 2088 | switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 2089 | { |
| 2090 | case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: |
| 2091 | case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: |
| 2092 | case BFD_MACH_O_S_SYMBOL_STUBS: |
| 2093 | nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec); |
| 2094 | break; |
| 2095 | default: |
| 2096 | break; |
| 2097 | } |
| 2098 | } |
| 2099 | return nisyms; |
| 2100 | } |
| 2101 | |
| 2102 | /* Create the dysymtab. */ |
| 2103 | |
| 2104 | static bfd_boolean |
| 2105 | bfd_mach_o_build_dysymtab (bfd *abfd, bfd_mach_o_dysymtab_command *cmd) |
| 2106 | { |
| 2107 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 2108 | |
| 2109 | /* TODO: |
| 2110 | We are not going to try and fill these in yet and, moreover, we are |
| 2111 | going to bail if they are already set. */ |
| 2112 | if (cmd->nmodtab != 0 |
| 2113 | || cmd->ntoc != 0 |
| 2114 | || cmd->nextrefsyms != 0) |
| 2115 | { |
| 2116 | _bfd_error_handler (_("sorry: modtab, toc and extrefsyms are not yet" |
| 2117 | " implemented for dysymtab commands.")); |
| 2118 | return FALSE; |
| 2119 | } |
| 2120 | |
| 2121 | cmd->ilocalsym = 0; |
| 2122 | |
| 2123 | if (bfd_get_symcount (abfd) > 0) |
| 2124 | { |
| 2125 | asymbol **symbols = bfd_get_outsymbols (abfd); |
| 2126 | unsigned long i; |
| 2127 | |
| 2128 | /* Count the number of each kind of symbol. */ |
| 2129 | for (i = 0; i < bfd_get_symcount (abfd); ++i) |
| 2130 | { |
| 2131 | bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; |
| 2132 | if (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)) |
| 2133 | break; |
| 2134 | } |
| 2135 | cmd->nlocalsym = i; |
| 2136 | cmd->iextdefsym = i; |
| 2137 | for (; i < bfd_get_symcount (abfd); ++i) |
| 2138 | { |
| 2139 | bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; |
| 2140 | if ((s->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF) |
| 2141 | break; |
| 2142 | } |
| 2143 | cmd->nextdefsym = i - cmd->nlocalsym; |
| 2144 | cmd->iundefsym = cmd->nextdefsym + cmd->iextdefsym; |
| 2145 | cmd->nundefsym = bfd_get_symcount (abfd) |
| 2146 | - cmd->nlocalsym |
| 2147 | - cmd->nextdefsym; |
| 2148 | } |
| 2149 | else |
| 2150 | { |
| 2151 | cmd->nlocalsym = 0; |
| 2152 | cmd->iextdefsym = 0; |
| 2153 | cmd->nextdefsym = 0; |
| 2154 | cmd->iundefsym = 0; |
| 2155 | cmd->nundefsym = 0; |
| 2156 | } |
| 2157 | |
| 2158 | cmd->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata); |
| 2159 | if (cmd->nindirectsyms > 0) |
| 2160 | { |
| 2161 | unsigned i; |
| 2162 | unsigned n; |
| 2163 | |
| 2164 | mdata->filelen = FILE_ALIGN (mdata->filelen, 2); |
| 2165 | cmd->indirectsymoff = mdata->filelen; |
| 2166 | mdata->filelen += cmd->nindirectsyms * 4; |
| 2167 | |
| 2168 | if (cmd->nindirectsyms * 4 < cmd->nindirectsyms) |
| 2169 | return FALSE; |
| 2170 | cmd->indirect_syms = bfd_zalloc (abfd, cmd->nindirectsyms * 4); |
| 2171 | if (cmd->indirect_syms == NULL) |
| 2172 | return FALSE; |
| 2173 | |
| 2174 | n = 0; |
| 2175 | for (i = 0; i < mdata->nsects; ++i) |
| 2176 | { |
| 2177 | bfd_mach_o_section *sec = mdata->sections[i]; |
| 2178 | |
| 2179 | switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 2180 | { |
| 2181 | case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: |
| 2182 | case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: |
| 2183 | case BFD_MACH_O_S_SYMBOL_STUBS: |
| 2184 | { |
| 2185 | unsigned j, num; |
| 2186 | bfd_mach_o_asymbol **isyms = sec->indirect_syms; |
| 2187 | |
| 2188 | num = bfd_mach_o_section_get_nbr_indirect (abfd, sec); |
| 2189 | if (isyms == NULL || num == 0) |
| 2190 | break; |
| 2191 | /* Record the starting index in the reserved1 field. */ |
| 2192 | sec->reserved1 = n; |
| 2193 | for (j = 0; j < num; j++, n++) |
| 2194 | { |
| 2195 | if (isyms[j] == NULL) |
| 2196 | cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL; |
| 2197 | else if (isyms[j]->symbol.section == bfd_abs_section_ptr |
| 2198 | && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT)) |
| 2199 | cmd->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL |
| 2200 | | BFD_MACH_O_INDIRECT_SYM_ABS; |
| 2201 | else |
| 2202 | cmd->indirect_syms[n] = isyms[j]->symbol.udata.i; |
| 2203 | } |
| 2204 | } |
| 2205 | break; |
| 2206 | default: |
| 2207 | break; |
| 2208 | } |
| 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | return TRUE; |
| 2213 | } |
| 2214 | |
| 2215 | /* Write a dysymtab command. |
| 2216 | TODO: Possibly coalesce writes of smaller objects. */ |
| 2217 | |
| 2218 | static bfd_boolean |
| 2219 | bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) |
| 2220 | { |
| 2221 | bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; |
| 2222 | |
| 2223 | BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); |
| 2224 | |
| 2225 | if (cmd->nmodtab != 0) |
| 2226 | { |
| 2227 | unsigned int i; |
| 2228 | |
| 2229 | if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) |
| 2230 | return FALSE; |
| 2231 | |
| 2232 | for (i = 0; i < cmd->nmodtab; i++) |
| 2233 | { |
| 2234 | bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; |
| 2235 | unsigned int iinit; |
| 2236 | unsigned int ninit; |
| 2237 | |
| 2238 | iinit = module->iinit & 0xffff; |
| 2239 | iinit |= ((module->iterm & 0xffff) << 16); |
| 2240 | |
| 2241 | ninit = module->ninit & 0xffff; |
| 2242 | ninit |= ((module->nterm & 0xffff) << 16); |
| 2243 | |
| 2244 | if (bfd_mach_o_wide_p (abfd)) |
| 2245 | { |
| 2246 | struct mach_o_dylib_module_64_external w; |
| 2247 | |
| 2248 | bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name); |
| 2249 | bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym); |
| 2250 | bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym); |
| 2251 | bfd_h_put_32 (abfd, module->irefsym, &w.irefsym); |
| 2252 | bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym); |
| 2253 | bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym); |
| 2254 | bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym); |
| 2255 | bfd_h_put_32 (abfd, module->iextrel, &w.iextrel); |
| 2256 | bfd_h_put_32 (abfd, module->nextrel, &w.nextrel); |
| 2257 | bfd_h_put_32 (abfd, iinit, &w.iinit_iterm); |
| 2258 | bfd_h_put_32 (abfd, ninit, &w.ninit_nterm); |
| 2259 | bfd_h_put_64 (abfd, module->objc_module_info_addr, |
| 2260 | &w.objc_module_info_addr); |
| 2261 | bfd_h_put_32 (abfd, module->objc_module_info_size, |
| 2262 | &w.objc_module_info_size); |
| 2263 | |
| 2264 | if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w)) |
| 2265 | return FALSE; |
| 2266 | } |
| 2267 | else |
| 2268 | { |
| 2269 | struct mach_o_dylib_module_external n; |
| 2270 | |
| 2271 | bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name); |
| 2272 | bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym); |
| 2273 | bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym); |
| 2274 | bfd_h_put_32 (abfd, module->irefsym, &n.irefsym); |
| 2275 | bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym); |
| 2276 | bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym); |
| 2277 | bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym); |
| 2278 | bfd_h_put_32 (abfd, module->iextrel, &n.iextrel); |
| 2279 | bfd_h_put_32 (abfd, module->nextrel, &n.nextrel); |
| 2280 | bfd_h_put_32 (abfd, iinit, &n.iinit_iterm); |
| 2281 | bfd_h_put_32 (abfd, ninit, &n.ninit_nterm); |
| 2282 | bfd_h_put_32 (abfd, module->objc_module_info_addr, |
| 2283 | &n.objc_module_info_addr); |
| 2284 | bfd_h_put_32 (abfd, module->objc_module_info_size, |
| 2285 | &n.objc_module_info_size); |
| 2286 | |
| 2287 | if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n)) |
| 2288 | return FALSE; |
| 2289 | } |
| 2290 | } |
| 2291 | } |
| 2292 | |
| 2293 | if (cmd->ntoc != 0) |
| 2294 | { |
| 2295 | unsigned int i; |
| 2296 | |
| 2297 | if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) |
| 2298 | return FALSE; |
| 2299 | |
| 2300 | for (i = 0; i < cmd->ntoc; i++) |
| 2301 | { |
| 2302 | struct mach_o_dylib_table_of_contents_external raw; |
| 2303 | bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; |
| 2304 | |
| 2305 | bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index); |
| 2306 | bfd_h_put_32 (abfd, toc->module_index, &raw.module_index); |
| 2307 | |
| 2308 | if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2309 | return FALSE; |
| 2310 | } |
| 2311 | } |
| 2312 | |
| 2313 | if (cmd->nindirectsyms > 0) |
| 2314 | { |
| 2315 | unsigned int i; |
| 2316 | |
| 2317 | if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) |
| 2318 | return FALSE; |
| 2319 | |
| 2320 | for (i = 0; i < cmd->nindirectsyms; ++i) |
| 2321 | { |
| 2322 | unsigned char raw[4]; |
| 2323 | |
| 2324 | bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw); |
| 2325 | if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2326 | return FALSE; |
| 2327 | } |
| 2328 | } |
| 2329 | |
| 2330 | if (cmd->nextrefsyms != 0) |
| 2331 | { |
| 2332 | unsigned int i; |
| 2333 | |
| 2334 | if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) |
| 2335 | return FALSE; |
| 2336 | |
| 2337 | for (i = 0; i < cmd->nextrefsyms; i++) |
| 2338 | { |
| 2339 | unsigned long v; |
| 2340 | unsigned char raw[4]; |
| 2341 | bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; |
| 2342 | |
| 2343 | /* Fields isym and flags are written as bit-fields, thus we need |
| 2344 | a specific processing for endianness. */ |
| 2345 | |
| 2346 | if (bfd_big_endian (abfd)) |
| 2347 | { |
| 2348 | v = ((ref->isym & 0xffffff) << 8); |
| 2349 | v |= ref->flags & 0xff; |
| 2350 | } |
| 2351 | else |
| 2352 | { |
| 2353 | v = ref->isym & 0xffffff; |
| 2354 | v |= ((ref->flags & 0xff) << 24); |
| 2355 | } |
| 2356 | |
| 2357 | bfd_h_put_32 (abfd, v, raw); |
| 2358 | if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2359 | return FALSE; |
| 2360 | } |
| 2361 | } |
| 2362 | |
| 2363 | /* The command. */ |
| 2364 | if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0) |
| 2365 | return FALSE; |
| 2366 | else |
| 2367 | { |
| 2368 | struct mach_o_dysymtab_command_external raw; |
| 2369 | |
| 2370 | bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym); |
| 2371 | bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym); |
| 2372 | bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym); |
| 2373 | bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym); |
| 2374 | bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym); |
| 2375 | bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym); |
| 2376 | bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff); |
| 2377 | bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc); |
| 2378 | bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff); |
| 2379 | bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab); |
| 2380 | bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff); |
| 2381 | bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms); |
| 2382 | bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff); |
| 2383 | bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms); |
| 2384 | bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff); |
| 2385 | bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel); |
| 2386 | bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff); |
| 2387 | bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel); |
| 2388 | |
| 2389 | if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 2390 | return FALSE; |
| 2391 | } |
| 2392 | |
| 2393 | return TRUE; |
| 2394 | } |
| 2395 | |
| 2396 | static unsigned |
| 2397 | bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s) |
| 2398 | { |
| 2399 | unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE; |
| 2400 | |
| 2401 | /* Just leave debug symbols where they are (pretend they are local, and |
| 2402 | then they will just be sorted on position). */ |
| 2403 | if (s->n_type & BFD_MACH_O_N_STAB) |
| 2404 | return 0; |
| 2405 | |
| 2406 | /* Local (we should never see an undefined local AFAICT). */ |
| 2407 | if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT))) |
| 2408 | return 0; |
| 2409 | |
| 2410 | /* Common symbols look like undefined externs. */ |
| 2411 | if (mtyp == BFD_MACH_O_N_UNDF) |
| 2412 | return 2; |
| 2413 | |
| 2414 | /* A defined non-local, non-debug symbol. */ |
| 2415 | return 1; |
| 2416 | } |
| 2417 | |
| 2418 | static int |
| 2419 | bfd_mach_o_cf_symbols (const void *a, const void *b) |
| 2420 | { |
| 2421 | bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a; |
| 2422 | bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b; |
| 2423 | unsigned int soa, sob; |
| 2424 | |
| 2425 | soa = bfd_mach_o_primary_symbol_sort_key (sa); |
| 2426 | sob = bfd_mach_o_primary_symbol_sort_key (sb); |
| 2427 | if (soa < sob) |
| 2428 | return -1; |
| 2429 | |
| 2430 | if (soa > sob) |
| 2431 | return 1; |
| 2432 | |
| 2433 | /* If it's local or stab, just preserve the input order. */ |
| 2434 | if (soa == 0) |
| 2435 | { |
| 2436 | if (sa->symbol.udata.i < sb->symbol.udata.i) |
| 2437 | return -1; |
| 2438 | if (sa->symbol.udata.i > sb->symbol.udata.i) |
| 2439 | return 1; |
| 2440 | |
| 2441 | /* This is probably an error. */ |
| 2442 | return 0; |
| 2443 | } |
| 2444 | |
| 2445 | /* The second sort key is name. */ |
| 2446 | return strcmp (sa->symbol.name, sb->symbol.name); |
| 2447 | } |
| 2448 | |
| 2449 | /* Process the symbols. |
| 2450 | |
| 2451 | This should be OK for single-module files - but it is not likely to work |
| 2452 | for multi-module shared libraries. |
| 2453 | |
| 2454 | (a) If the application has not filled in the relevant mach-o fields, make |
| 2455 | an estimate. |
| 2456 | |
| 2457 | (b) Order them, like this: |
| 2458 | ( i) local. |
| 2459 | (unsorted) |
| 2460 | ( ii) external defined |
| 2461 | (by name) |
| 2462 | (iii) external undefined/common |
| 2463 | (by name) |
| 2464 | ( iv) common |
| 2465 | (by name) |
| 2466 | */ |
| 2467 | |
| 2468 | static bfd_boolean |
| 2469 | bfd_mach_o_mangle_symbols (bfd *abfd) |
| 2470 | { |
| 2471 | unsigned long i; |
| 2472 | asymbol **symbols = bfd_get_outsymbols (abfd); |
| 2473 | |
| 2474 | if (symbols == NULL || bfd_get_symcount (abfd) == 0) |
| 2475 | return TRUE; |
| 2476 | |
| 2477 | for (i = 0; i < bfd_get_symcount (abfd); i++) |
| 2478 | { |
| 2479 | bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; |
| 2480 | |
| 2481 | /* We use this value, which is out-of-range as a symbol index, to signal |
| 2482 | that the mach-o-specific data are not filled in and need to be created |
| 2483 | from the bfd values. It is much preferable for the application to do |
| 2484 | this, since more meaningful diagnostics can be made that way. */ |
| 2485 | |
| 2486 | if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET) |
| 2487 | { |
| 2488 | /* No symbol information has been set - therefore determine |
| 2489 | it from the bfd symbol flags/info. */ |
| 2490 | if (s->symbol.section == bfd_abs_section_ptr) |
| 2491 | s->n_type = BFD_MACH_O_N_ABS; |
| 2492 | else if (s->symbol.section == bfd_und_section_ptr) |
| 2493 | { |
| 2494 | s->n_type = BFD_MACH_O_N_UNDF; |
| 2495 | if (s->symbol.flags & BSF_WEAK) |
| 2496 | s->n_desc |= BFD_MACH_O_N_WEAK_REF; |
| 2497 | /* mach-o automatically makes undefined symbols extern. */ |
| 2498 | s->n_type |= BFD_MACH_O_N_EXT; |
| 2499 | s->symbol.flags |= BSF_GLOBAL; |
| 2500 | } |
| 2501 | else if (s->symbol.section == bfd_com_section_ptr) |
| 2502 | { |
| 2503 | s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT; |
| 2504 | s->symbol.flags |= BSF_GLOBAL; |
| 2505 | } |
| 2506 | else |
| 2507 | s->n_type = BFD_MACH_O_N_SECT; |
| 2508 | } |
| 2509 | |
| 2510 | /* Update external symbol bit in case objcopy changed it. */ |
| 2511 | if (s->symbol.flags & BSF_GLOBAL) |
| 2512 | s->n_type |= BFD_MACH_O_N_EXT; |
| 2513 | else |
| 2514 | s->n_type &= ~BFD_MACH_O_N_EXT; |
| 2515 | |
| 2516 | /* Put the section index in, where required. */ |
| 2517 | if ((s->symbol.section != bfd_abs_section_ptr |
| 2518 | && s->symbol.section != bfd_und_section_ptr |
| 2519 | && s->symbol.section != bfd_com_section_ptr) |
| 2520 | || ((s->n_type & BFD_MACH_O_N_STAB) != 0 |
| 2521 | && s->symbol.name == NULL)) |
| 2522 | s->n_sect = s->symbol.section->output_section->target_index; |
| 2523 | |
| 2524 | /* Number to preserve order for local and debug syms. */ |
| 2525 | s->symbol.udata.i = i; |
| 2526 | } |
| 2527 | |
| 2528 | /* Sort the symbols. */ |
| 2529 | qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd), |
| 2530 | sizeof (asymbol *), bfd_mach_o_cf_symbols); |
| 2531 | |
| 2532 | for (i = 0; i < bfd_get_symcount (abfd); ++i) |
| 2533 | { |
| 2534 | bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; |
| 2535 | s->symbol.udata.i = i; /* renumber. */ |
| 2536 | } |
| 2537 | |
| 2538 | return TRUE; |
| 2539 | } |
| 2540 | |
| 2541 | /* We build a flat table of sections, which can be re-ordered if necessary. |
| 2542 | Fill in the section number and other mach-o-specific data. */ |
| 2543 | |
| 2544 | static bfd_boolean |
| 2545 | bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata) |
| 2546 | { |
| 2547 | asection *sec; |
| 2548 | unsigned target_index; |
| 2549 | unsigned nsect; |
| 2550 | |
| 2551 | nsect = bfd_count_sections (abfd); |
| 2552 | |
| 2553 | /* Don't do it if it's already set - assume the application knows what it's |
| 2554 | doing. */ |
| 2555 | if (mdata->nsects == nsect |
| 2556 | && (mdata->nsects == 0 || mdata->sections != NULL)) |
| 2557 | return TRUE; |
| 2558 | |
| 2559 | /* We need to check that this can be done... */ |
| 2560 | if (nsect > 255) |
| 2561 | { |
| 2562 | _bfd_error_handler (_("mach-o: there are too many sections (%u)" |
| 2563 | " maximum is 255,\n"), nsect); |
| 2564 | return FALSE; |
| 2565 | } |
| 2566 | |
| 2567 | mdata->nsects = nsect; |
| 2568 | mdata->sections = bfd_alloc2 (abfd, |
| 2569 | mdata->nsects, sizeof (bfd_mach_o_section *)); |
| 2570 | if (mdata->sections == NULL) |
| 2571 | return FALSE; |
| 2572 | |
| 2573 | /* Create Mach-O sections. |
| 2574 | Section type, attribute and align should have been set when the |
| 2575 | section was created - either read in or specified. */ |
| 2576 | target_index = 0; |
| 2577 | for (sec = abfd->sections; sec; sec = sec->next) |
| 2578 | { |
| 2579 | unsigned bfd_align = bfd_get_section_alignment (abfd, sec); |
| 2580 | bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec); |
| 2581 | |
| 2582 | mdata->sections[target_index] = msect; |
| 2583 | |
| 2584 | msect->addr = bfd_get_section_vma (abfd, sec); |
| 2585 | msect->size = bfd_get_section_size (sec); |
| 2586 | |
| 2587 | /* Use the largest alignment set, in case it was bumped after the |
| 2588 | section was created. */ |
| 2589 | msect->align = msect->align > bfd_align ? msect->align : bfd_align; |
| 2590 | |
| 2591 | msect->offset = 0; |
| 2592 | sec->target_index = ++target_index; |
| 2593 | } |
| 2594 | |
| 2595 | return TRUE; |
| 2596 | } |
| 2597 | |
| 2598 | bfd_boolean |
| 2599 | bfd_mach_o_write_contents (bfd *abfd) |
| 2600 | { |
| 2601 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 2602 | bfd_mach_o_load_command *cmd; |
| 2603 | bfd_mach_o_symtab_command *symtab = NULL; |
| 2604 | bfd_mach_o_dysymtab_command *dysymtab = NULL; |
| 2605 | bfd_mach_o_segment_command *linkedit = NULL; |
| 2606 | |
| 2607 | /* Make the commands, if not already present. */ |
| 2608 | if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) |
| 2609 | return FALSE; |
| 2610 | abfd->output_has_begun = TRUE; |
| 2611 | |
| 2612 | /* Write the header. */ |
| 2613 | if (!bfd_mach_o_write_header (abfd, &mdata->header)) |
| 2614 | return FALSE; |
| 2615 | |
| 2616 | /* First pass: allocate the linkedit segment. */ |
| 2617 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 2618 | switch (cmd->type) |
| 2619 | { |
| 2620 | case BFD_MACH_O_LC_SEGMENT_64: |
| 2621 | case BFD_MACH_O_LC_SEGMENT: |
| 2622 | if (strcmp (cmd->command.segment.segname, "__LINKEDIT") == 0) |
| 2623 | linkedit = &cmd->command.segment; |
| 2624 | break; |
| 2625 | case BFD_MACH_O_LC_SYMTAB: |
| 2626 | symtab = &cmd->command.symtab; |
| 2627 | break; |
| 2628 | case BFD_MACH_O_LC_DYSYMTAB: |
| 2629 | dysymtab = &cmd->command.dysymtab; |
| 2630 | break; |
| 2631 | case BFD_MACH_O_LC_DYLD_INFO: |
| 2632 | { |
| 2633 | bfd_mach_o_dyld_info_command *di = &cmd->command.dyld_info; |
| 2634 | |
| 2635 | if (di->rebase_size != 0) |
| 2636 | { |
| 2637 | di->rebase_off = mdata->filelen; |
| 2638 | mdata->filelen += di->rebase_size; |
| 2639 | } |
| 2640 | if (di->bind_size != 0) |
| 2641 | { |
| 2642 | di->bind_off = mdata->filelen; |
| 2643 | mdata->filelen += di->bind_size; |
| 2644 | } |
| 2645 | if (di->weak_bind_size != 0) |
| 2646 | { |
| 2647 | di->weak_bind_off = mdata->filelen; |
| 2648 | mdata->filelen += di->weak_bind_size; |
| 2649 | } |
| 2650 | if (di->lazy_bind_size != 0) |
| 2651 | { |
| 2652 | di->lazy_bind_off = mdata->filelen; |
| 2653 | mdata->filelen += di->lazy_bind_size; |
| 2654 | } |
| 2655 | if (di->export_size != 0) |
| 2656 | { |
| 2657 | di->export_off = mdata->filelen; |
| 2658 | mdata->filelen += di->export_size; |
| 2659 | } |
| 2660 | } |
| 2661 | break; |
| 2662 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 2663 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 2664 | case BFD_MACH_O_LC_MAIN: |
| 2665 | /* Nothing to do. */ |
| 2666 | break; |
| 2667 | default: |
| 2668 | _bfd_error_handler |
| 2669 | (_("unable to allocate data for load command %#x"), |
| 2670 | cmd->type); |
| 2671 | break; |
| 2672 | } |
| 2673 | |
| 2674 | /* Specially handle symtab and dysymtab. */ |
| 2675 | |
| 2676 | /* Pre-allocate the symbol table (but not the string table). The reason |
| 2677 | is that the dysymtab is after the symbol table but before the string |
| 2678 | table (required by the native strip tool). */ |
| 2679 | if (symtab != NULL) |
| 2680 | { |
| 2681 | unsigned int symlen; |
| 2682 | unsigned int wide = bfd_mach_o_wide_p (abfd); |
| 2683 | |
| 2684 | symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; |
| 2685 | |
| 2686 | /* Align for symbols. */ |
| 2687 | mdata->filelen = FILE_ALIGN (mdata->filelen, wide ? 3 : 2); |
| 2688 | symtab->symoff = mdata->filelen; |
| 2689 | |
| 2690 | symtab->nsyms = bfd_get_symcount (abfd); |
| 2691 | mdata->filelen += symtab->nsyms * symlen; |
| 2692 | } |
| 2693 | |
| 2694 | /* Build the dysymtab. */ |
| 2695 | if (dysymtab != NULL) |
| 2696 | if (!bfd_mach_o_build_dysymtab (abfd, dysymtab)) |
| 2697 | return FALSE; |
| 2698 | |
| 2699 | /* Write symtab and strtab. */ |
| 2700 | if (symtab != NULL) |
| 2701 | if (!bfd_mach_o_write_symtab_content (abfd, symtab)) |
| 2702 | return FALSE; |
| 2703 | |
| 2704 | /* Adjust linkedit size. */ |
| 2705 | if (linkedit != NULL) |
| 2706 | { |
| 2707 | /* bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; */ |
| 2708 | |
| 2709 | linkedit->vmsize = mdata->filelen - linkedit->fileoff; |
| 2710 | /* linkedit->vmsize = (linkedit->vmsize + pagemask) & ~pagemask; */ |
| 2711 | linkedit->filesize = mdata->filelen - linkedit->fileoff; |
| 2712 | |
| 2713 | linkedit->initprot = BFD_MACH_O_PROT_READ; |
| 2714 | linkedit->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE |
| 2715 | | BFD_MACH_O_PROT_EXECUTE; |
| 2716 | } |
| 2717 | |
| 2718 | /* Second pass: write commands. */ |
| 2719 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 2720 | { |
| 2721 | struct mach_o_load_command_external raw; |
| 2722 | unsigned long typeflag; |
| 2723 | |
| 2724 | typeflag = cmd->type | (cmd->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0); |
| 2725 | |
| 2726 | bfd_h_put_32 (abfd, typeflag, raw.cmd); |
| 2727 | bfd_h_put_32 (abfd, cmd->len, raw.cmdsize); |
| 2728 | |
| 2729 | if (bfd_seek (abfd, cmd->offset, SEEK_SET) != 0 |
| 2730 | || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8) |
| 2731 | return FALSE; |
| 2732 | |
| 2733 | switch (cmd->type) |
| 2734 | { |
| 2735 | case BFD_MACH_O_LC_SEGMENT: |
| 2736 | if (!bfd_mach_o_write_segment_32 (abfd, cmd)) |
| 2737 | return FALSE; |
| 2738 | break; |
| 2739 | case BFD_MACH_O_LC_SEGMENT_64: |
| 2740 | if (!bfd_mach_o_write_segment_64 (abfd, cmd)) |
| 2741 | return FALSE; |
| 2742 | break; |
| 2743 | case BFD_MACH_O_LC_SYMTAB: |
| 2744 | if (!bfd_mach_o_write_symtab (abfd, cmd)) |
| 2745 | return FALSE; |
| 2746 | break; |
| 2747 | case BFD_MACH_O_LC_DYSYMTAB: |
| 2748 | if (!bfd_mach_o_write_dysymtab (abfd, cmd)) |
| 2749 | return FALSE; |
| 2750 | break; |
| 2751 | case BFD_MACH_O_LC_THREAD: |
| 2752 | case BFD_MACH_O_LC_UNIXTHREAD: |
| 2753 | if (!bfd_mach_o_write_thread (abfd, cmd)) |
| 2754 | return FALSE; |
| 2755 | break; |
| 2756 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 2757 | if (!bfd_mach_o_write_dylib (abfd, cmd)) |
| 2758 | return FALSE; |
| 2759 | break; |
| 2760 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 2761 | if (!bfd_mach_o_write_dylinker (abfd, cmd)) |
| 2762 | return FALSE; |
| 2763 | break; |
| 2764 | case BFD_MACH_O_LC_MAIN: |
| 2765 | if (!bfd_mach_o_write_main (abfd, cmd)) |
| 2766 | return FALSE; |
| 2767 | break; |
| 2768 | case BFD_MACH_O_LC_DYLD_INFO: |
| 2769 | if (!bfd_mach_o_write_dyld_info (abfd, cmd)) |
| 2770 | return FALSE; |
| 2771 | break; |
| 2772 | default: |
| 2773 | _bfd_error_handler |
| 2774 | (_("unable to write unknown load command %#x"), |
| 2775 | cmd->type); |
| 2776 | return FALSE; |
| 2777 | } |
| 2778 | } |
| 2779 | |
| 2780 | return TRUE; |
| 2781 | } |
| 2782 | |
| 2783 | static void |
| 2784 | bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg, |
| 2785 | bfd_mach_o_section *s) |
| 2786 | { |
| 2787 | if (seg->sect_head == NULL) |
| 2788 | seg->sect_head = s; |
| 2789 | else |
| 2790 | seg->sect_tail->next = s; |
| 2791 | seg->sect_tail = s; |
| 2792 | } |
| 2793 | |
| 2794 | /* Create section Mach-O flags from BFD flags. */ |
| 2795 | |
| 2796 | static void |
| 2797 | bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, |
| 2798 | asection *sec) |
| 2799 | { |
| 2800 | flagword bfd_flags; |
| 2801 | bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec); |
| 2802 | |
| 2803 | /* Create default flags. */ |
| 2804 | bfd_flags = bfd_get_section_flags (abfd, sec); |
| 2805 | if ((bfd_flags & SEC_CODE) == SEC_CODE) |
| 2806 | s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS |
| 2807 | | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS |
| 2808 | | BFD_MACH_O_S_REGULAR; |
| 2809 | else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC) |
| 2810 | s->flags = BFD_MACH_O_S_ZEROFILL; |
| 2811 | else if (bfd_flags & SEC_DEBUGGING) |
| 2812 | s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG; |
| 2813 | else |
| 2814 | s->flags = BFD_MACH_O_S_REGULAR; |
| 2815 | } |
| 2816 | |
| 2817 | static bfd_boolean |
| 2818 | bfd_mach_o_build_obj_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) |
| 2819 | { |
| 2820 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 2821 | unsigned int i, j; |
| 2822 | |
| 2823 | seg->vmaddr = 0; |
| 2824 | seg->fileoff = mdata->filelen; |
| 2825 | seg->initprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE |
| 2826 | | BFD_MACH_O_PROT_EXECUTE; |
| 2827 | seg->maxprot = seg->initprot; |
| 2828 | |
| 2829 | /* Append sections to the segment. |
| 2830 | |
| 2831 | This is a little tedious, we have to honor the need to account zerofill |
| 2832 | sections after all the rest. This forces us to do the calculation of |
| 2833 | total vmsize in three passes so that any alignment increments are |
| 2834 | properly accounted. */ |
| 2835 | for (i = 0; i < mdata->nsects; ++i) |
| 2836 | { |
| 2837 | bfd_mach_o_section *s = mdata->sections[i]; |
| 2838 | asection *sec = s->bfdsection; |
| 2839 | |
| 2840 | /* Although we account for zerofill section sizes in vm order, they are |
| 2841 | placed in the file in source sequence. */ |
| 2842 | bfd_mach_o_append_section_to_segment (seg, s); |
| 2843 | s->offset = 0; |
| 2844 | |
| 2845 | /* Zerofill sections have zero file size & offset, the only content |
| 2846 | written to the file is the symbols. */ |
| 2847 | if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL |
| 2848 | || ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 2849 | == BFD_MACH_O_S_GB_ZEROFILL)) |
| 2850 | continue; |
| 2851 | |
| 2852 | /* The Darwin system tools (in MH_OBJECT files, at least) always account |
| 2853 | sections, even those with zero size. */ |
| 2854 | if (s->size > 0) |
| 2855 | { |
| 2856 | seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); |
| 2857 | seg->vmsize += s->size; |
| 2858 | |
| 2859 | /* MH_OBJECT files have unaligned content. */ |
| 2860 | if (1) |
| 2861 | { |
| 2862 | seg->filesize = FILE_ALIGN (seg->filesize, s->align); |
| 2863 | mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); |
| 2864 | } |
| 2865 | seg->filesize += s->size; |
| 2866 | |
| 2867 | /* The system tools write even zero-sized sections with an offset |
| 2868 | field set to the current file position. */ |
| 2869 | s->offset = mdata->filelen; |
| 2870 | } |
| 2871 | |
| 2872 | sec->filepos = s->offset; |
| 2873 | mdata->filelen += s->size; |
| 2874 | } |
| 2875 | |
| 2876 | /* Now pass through again, for zerofill, only now we just update the |
| 2877 | vmsize, and then for zerofill_GB. */ |
| 2878 | for (j = 0; j < 2; j++) |
| 2879 | { |
| 2880 | unsigned int stype; |
| 2881 | |
| 2882 | if (j == 0) |
| 2883 | stype = BFD_MACH_O_S_ZEROFILL; |
| 2884 | else |
| 2885 | stype = BFD_MACH_O_S_GB_ZEROFILL; |
| 2886 | |
| 2887 | for (i = 0; i < mdata->nsects; ++i) |
| 2888 | { |
| 2889 | bfd_mach_o_section *s = mdata->sections[i]; |
| 2890 | |
| 2891 | if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != stype) |
| 2892 | continue; |
| 2893 | |
| 2894 | if (s->size > 0) |
| 2895 | { |
| 2896 | seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); |
| 2897 | seg->vmsize += s->size; |
| 2898 | } |
| 2899 | } |
| 2900 | } |
| 2901 | |
| 2902 | /* Allocate space for the relocations. */ |
| 2903 | mdata->filelen = FILE_ALIGN (mdata->filelen, 2); |
| 2904 | |
| 2905 | for (i = 0; i < mdata->nsects; ++i) |
| 2906 | { |
| 2907 | bfd_mach_o_section *ms = mdata->sections[i]; |
| 2908 | asection *sec = ms->bfdsection; |
| 2909 | |
| 2910 | ms->nreloc = sec->reloc_count; |
| 2911 | if (ms->nreloc == 0) |
| 2912 | { |
| 2913 | /* Clear nreloc and reloff if there is no relocs. */ |
| 2914 | ms->reloff = 0; |
| 2915 | continue; |
| 2916 | } |
| 2917 | sec->rel_filepos = mdata->filelen; |
| 2918 | ms->reloff = sec->rel_filepos; |
| 2919 | mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE; |
| 2920 | } |
| 2921 | |
| 2922 | return TRUE; |
| 2923 | } |
| 2924 | |
| 2925 | static bfd_boolean |
| 2926 | bfd_mach_o_build_exec_seg_command (bfd *abfd, bfd_mach_o_segment_command *seg) |
| 2927 | { |
| 2928 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 2929 | unsigned int i; |
| 2930 | bfd_vma pagemask = bfd_mach_o_get_backend_data (abfd)->page_size - 1; |
| 2931 | bfd_vma vma; |
| 2932 | bfd_mach_o_section *s; |
| 2933 | |
| 2934 | seg->vmsize = 0; |
| 2935 | |
| 2936 | seg->fileoff = mdata->filelen; |
| 2937 | seg->maxprot = 0; |
| 2938 | seg->initprot = 0; |
| 2939 | seg->flags = 0; |
| 2940 | |
| 2941 | /* Append sections to the segment. We assume they are properly ordered |
| 2942 | by vma (but we check that). */ |
| 2943 | vma = 0; |
| 2944 | for (i = 0; i < mdata->nsects; ++i) |
| 2945 | { |
| 2946 | s = mdata->sections[i]; |
| 2947 | |
| 2948 | /* Consider only sections for this segment. */ |
| 2949 | if (strcmp (seg->segname, s->segname) != 0) |
| 2950 | continue; |
| 2951 | |
| 2952 | bfd_mach_o_append_section_to_segment (seg, s); |
| 2953 | |
| 2954 | if (s->addr < vma) |
| 2955 | { |
| 2956 | _bfd_error_handler |
| 2957 | /* xgettext:c-format */ |
| 2958 | (_("section address (%#" PRIx64 ") " |
| 2959 | "below start of segment (%#" PRIx64 ")"), |
| 2960 | (uint64_t) s->addr, (uint64_t) vma); |
| 2961 | return FALSE; |
| 2962 | } |
| 2963 | |
| 2964 | vma = s->addr + s->size; |
| 2965 | } |
| 2966 | |
| 2967 | /* Set segment file offset: make it page aligned. */ |
| 2968 | vma = seg->sect_head->addr; |
| 2969 | seg->vmaddr = vma & ~pagemask; |
| 2970 | if ((mdata->filelen & pagemask) > (vma & pagemask)) |
| 2971 | mdata->filelen += pagemask + 1; |
| 2972 | seg->fileoff = mdata->filelen & ~pagemask; |
| 2973 | mdata->filelen = seg->fileoff + (vma & pagemask); |
| 2974 | |
| 2975 | /* Set section file offset. */ |
| 2976 | for (s = seg->sect_head; s != NULL; s = s->next) |
| 2977 | { |
| 2978 | asection *sec = s->bfdsection; |
| 2979 | flagword flags = bfd_get_section_flags (abfd, sec); |
| 2980 | |
| 2981 | /* Adjust segment size. */ |
| 2982 | seg->vmsize = FILE_ALIGN (seg->vmsize, s->align); |
| 2983 | seg->vmsize += s->size; |
| 2984 | |
| 2985 | /* File offset and length. */ |
| 2986 | seg->filesize = FILE_ALIGN (seg->filesize, s->align); |
| 2987 | |
| 2988 | if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL |
| 2989 | && ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 2990 | != BFD_MACH_O_S_GB_ZEROFILL)) |
| 2991 | { |
| 2992 | mdata->filelen = FILE_ALIGN (mdata->filelen, s->align); |
| 2993 | |
| 2994 | s->offset = mdata->filelen; |
| 2995 | s->bfdsection->filepos = s->offset; |
| 2996 | |
| 2997 | seg->filesize += s->size; |
| 2998 | mdata->filelen += s->size; |
| 2999 | } |
| 3000 | else |
| 3001 | { |
| 3002 | s->offset = 0; |
| 3003 | s->bfdsection->filepos = 0; |
| 3004 | } |
| 3005 | |
| 3006 | /* Set protection. */ |
| 3007 | if (flags & SEC_LOAD) |
| 3008 | { |
| 3009 | if (flags & SEC_CODE) |
| 3010 | seg->initprot |= BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_EXECUTE; |
| 3011 | if ((flags & (SEC_DATA | SEC_READONLY)) == SEC_DATA) |
| 3012 | seg->initprot |= BFD_MACH_O_PROT_WRITE | BFD_MACH_O_PROT_READ; |
| 3013 | } |
| 3014 | |
| 3015 | /* Relocs shouldn't appear in non-object files. */ |
| 3016 | if (s->bfdsection->reloc_count != 0) |
| 3017 | return FALSE; |
| 3018 | } |
| 3019 | |
| 3020 | /* Set maxprot. */ |
| 3021 | if (seg->initprot != 0) |
| 3022 | seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE |
| 3023 | | BFD_MACH_O_PROT_EXECUTE; |
| 3024 | else |
| 3025 | seg->maxprot = 0; |
| 3026 | |
| 3027 | /* Round segment size (and file size). */ |
| 3028 | seg->vmsize = (seg->vmsize + pagemask) & ~pagemask; |
| 3029 | seg->filesize = (seg->filesize + pagemask) & ~pagemask; |
| 3030 | mdata->filelen = (mdata->filelen + pagemask) & ~pagemask; |
| 3031 | |
| 3032 | return TRUE; |
| 3033 | } |
| 3034 | |
| 3035 | /* Layout the commands: set commands size and offset, set ncmds and sizeofcmds |
| 3036 | fields in header. */ |
| 3037 | |
| 3038 | static bfd_boolean |
| 3039 | bfd_mach_o_layout_commands (bfd_mach_o_data_struct *mdata) |
| 3040 | { |
| 3041 | unsigned wide = mach_o_wide_p (&mdata->header); |
| 3042 | unsigned int hdrlen; |
| 3043 | ufile_ptr offset; |
| 3044 | bfd_mach_o_load_command *cmd; |
| 3045 | unsigned int align; |
| 3046 | bfd_boolean ret = TRUE; |
| 3047 | |
| 3048 | hdrlen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; |
| 3049 | align = wide ? 8 - 1 : 4 - 1; |
| 3050 | offset = hdrlen; |
| 3051 | mdata->header.ncmds = 0; |
| 3052 | |
| 3053 | for (cmd = mdata->first_command; cmd; cmd = cmd->next) |
| 3054 | { |
| 3055 | mdata->header.ncmds++; |
| 3056 | cmd->offset = offset; |
| 3057 | |
| 3058 | switch (cmd->type) |
| 3059 | { |
| 3060 | case BFD_MACH_O_LC_SEGMENT_64: |
| 3061 | cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE |
| 3062 | + BFD_MACH_O_SECTION_64_SIZE * cmd->command.segment.nsects; |
| 3063 | break; |
| 3064 | case BFD_MACH_O_LC_SEGMENT: |
| 3065 | cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE |
| 3066 | + BFD_MACH_O_SECTION_SIZE * cmd->command.segment.nsects; |
| 3067 | break; |
| 3068 | case BFD_MACH_O_LC_SYMTAB: |
| 3069 | cmd->len = sizeof (struct mach_o_symtab_command_external) |
| 3070 | + BFD_MACH_O_LC_SIZE; |
| 3071 | break; |
| 3072 | case BFD_MACH_O_LC_DYSYMTAB: |
| 3073 | cmd->len = sizeof (struct mach_o_dysymtab_command_external) |
| 3074 | + BFD_MACH_O_LC_SIZE; |
| 3075 | break; |
| 3076 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 3077 | cmd->len = sizeof (struct mach_o_dylib_command_external) |
| 3078 | + BFD_MACH_O_LC_SIZE; |
| 3079 | cmd->command.dylib.name_offset = cmd->len; |
| 3080 | cmd->len += strlen (cmd->command.dylib.name_str); |
| 3081 | cmd->len = (cmd->len + align) & ~align; |
| 3082 | break; |
| 3083 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 3084 | cmd->len = sizeof (struct mach_o_str_command_external) |
| 3085 | + BFD_MACH_O_LC_SIZE; |
| 3086 | cmd->command.dylinker.name_offset = cmd->len; |
| 3087 | cmd->len += strlen (cmd->command.dylinker.name_str); |
| 3088 | cmd->len = (cmd->len + align) & ~align; |
| 3089 | break; |
| 3090 | case BFD_MACH_O_LC_MAIN: |
| 3091 | cmd->len = sizeof (struct mach_o_entry_point_command_external) |
| 3092 | + BFD_MACH_O_LC_SIZE; |
| 3093 | break; |
| 3094 | case BFD_MACH_O_LC_DYLD_INFO: |
| 3095 | cmd->len = sizeof (struct mach_o_dyld_info_command_external) |
| 3096 | + BFD_MACH_O_LC_SIZE; |
| 3097 | break; |
| 3098 | default: |
| 3099 | _bfd_error_handler |
| 3100 | (_("unable to layout unknown load command %#x"), |
| 3101 | cmd->type); |
| 3102 | ret = FALSE; |
| 3103 | break; |
| 3104 | } |
| 3105 | |
| 3106 | BFD_ASSERT (cmd->len % (align + 1) == 0); |
| 3107 | offset += cmd->len; |
| 3108 | } |
| 3109 | mdata->header.sizeofcmds = offset - hdrlen; |
| 3110 | mdata->filelen = offset; |
| 3111 | |
| 3112 | return ret; |
| 3113 | } |
| 3114 | |
| 3115 | /* Subroutine of bfd_mach_o_build_commands: set type, name and nsects of a |
| 3116 | segment. */ |
| 3117 | |
| 3118 | static void |
| 3119 | bfd_mach_o_init_segment (bfd_mach_o_data_struct *mdata, |
| 3120 | bfd_mach_o_load_command *cmd, |
| 3121 | const char *segname, unsigned int nbr_sect) |
| 3122 | { |
| 3123 | bfd_mach_o_segment_command *seg = &cmd->command.segment; |
| 3124 | unsigned wide = mach_o_wide_p (&mdata->header); |
| 3125 | |
| 3126 | /* Init segment command. */ |
| 3127 | cmd->type = wide ? BFD_MACH_O_LC_SEGMENT_64 : BFD_MACH_O_LC_SEGMENT; |
| 3128 | cmd->type_required = FALSE; |
| 3129 | |
| 3130 | strcpy (seg->segname, segname); |
| 3131 | seg->nsects = nbr_sect; |
| 3132 | |
| 3133 | seg->vmaddr = 0; |
| 3134 | seg->vmsize = 0; |
| 3135 | |
| 3136 | seg->fileoff = 0; |
| 3137 | seg->filesize = 0; |
| 3138 | seg->maxprot = 0; |
| 3139 | seg->initprot = 0; |
| 3140 | seg->flags = 0; |
| 3141 | seg->sect_head = NULL; |
| 3142 | seg->sect_tail = NULL; |
| 3143 | } |
| 3144 | |
| 3145 | /* Build Mach-O load commands (currently assuming an MH_OBJECT file). |
| 3146 | TODO: Other file formats, rebuilding symtab/dysymtab commands for strip |
| 3147 | and copy functionality. */ |
| 3148 | |
| 3149 | bfd_boolean |
| 3150 | bfd_mach_o_build_commands (bfd *abfd) |
| 3151 | { |
| 3152 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 3153 | unsigned wide = mach_o_wide_p (&mdata->header); |
| 3154 | unsigned int nbr_segcmd = 0; |
| 3155 | bfd_mach_o_load_command *commands; |
| 3156 | unsigned int nbr_commands; |
| 3157 | int symtab_idx = -1; |
| 3158 | int dysymtab_idx = -1; |
| 3159 | int main_idx = -1; |
| 3160 | unsigned int i; |
| 3161 | |
| 3162 | /* Return now if already built. */ |
| 3163 | if (mdata->header.ncmds != 0) |
| 3164 | return TRUE; |
| 3165 | |
| 3166 | /* Fill in the file type, if not already set. */ |
| 3167 | if (mdata->header.filetype == 0) |
| 3168 | { |
| 3169 | if (abfd->flags & EXEC_P) |
| 3170 | mdata->header.filetype = BFD_MACH_O_MH_EXECUTE; |
| 3171 | else if (abfd->flags & DYNAMIC) |
| 3172 | mdata->header.filetype = BFD_MACH_O_MH_DYLIB; |
| 3173 | else |
| 3174 | mdata->header.filetype = BFD_MACH_O_MH_OBJECT; |
| 3175 | } |
| 3176 | |
| 3177 | /* If hasn't already been done, flatten sections list, and sort |
| 3178 | if/when required. Must be done before the symbol table is adjusted, |
| 3179 | since that depends on properly numbered sections. */ |
| 3180 | if (mdata->nsects == 0 || mdata->sections == NULL) |
| 3181 | if (! bfd_mach_o_mangle_sections (abfd, mdata)) |
| 3182 | return FALSE; |
| 3183 | |
| 3184 | /* Order the symbol table, fill-in/check mach-o specific fields and |
| 3185 | partition out any indirect symbols. */ |
| 3186 | if (!bfd_mach_o_mangle_symbols (abfd)) |
| 3187 | return FALSE; |
| 3188 | |
| 3189 | /* Segment commands. */ |
| 3190 | if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) |
| 3191 | { |
| 3192 | /* Only one segment for all the sections. But the segment is |
| 3193 | optional if there is no sections. */ |
| 3194 | nbr_segcmd = (mdata->nsects > 0) ? 1 : 0; |
| 3195 | } |
| 3196 | else |
| 3197 | { |
| 3198 | bfd_mach_o_section *prev_sect = NULL; |
| 3199 | |
| 3200 | /* One pagezero segment and one linkedit segment. */ |
| 3201 | nbr_segcmd = 2; |
| 3202 | |
| 3203 | /* Create one segment for associated segment name in sections. |
| 3204 | Assume that sections with the same segment name are consecutive. */ |
| 3205 | for (i = 0; i < mdata->nsects; i++) |
| 3206 | { |
| 3207 | bfd_mach_o_section *this_sect = mdata->sections[i]; |
| 3208 | |
| 3209 | if (prev_sect == NULL |
| 3210 | || strcmp (prev_sect->segname, this_sect->segname) != 0) |
| 3211 | { |
| 3212 | nbr_segcmd++; |
| 3213 | prev_sect = this_sect; |
| 3214 | } |
| 3215 | } |
| 3216 | } |
| 3217 | |
| 3218 | nbr_commands = nbr_segcmd; |
| 3219 | |
| 3220 | /* One command for the symbol table (only if there are symbols. */ |
| 3221 | if (bfd_get_symcount (abfd) > 0) |
| 3222 | symtab_idx = nbr_commands++; |
| 3223 | |
| 3224 | /* FIXME: |
| 3225 | This is a rather crude test for whether we should build a dysymtab. */ |
| 3226 | if (bfd_mach_o_should_emit_dysymtab () |
| 3227 | && bfd_get_symcount (abfd)) |
| 3228 | { |
| 3229 | /* If there should be a case where a dysymtab could be emitted without |
| 3230 | a symtab (seems improbable), this would need amending. */ |
| 3231 | dysymtab_idx = nbr_commands++; |
| 3232 | } |
| 3233 | |
| 3234 | /* Add an entry point command. */ |
| 3235 | if (mdata->header.filetype == BFD_MACH_O_MH_EXECUTE |
| 3236 | && bfd_get_start_address (abfd) != 0) |
| 3237 | main_idx = nbr_commands++; |
| 3238 | |
| 3239 | /* Well, we must have a header, at least. */ |
| 3240 | mdata->filelen = wide ? BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; |
| 3241 | |
| 3242 | /* A bit unusual, but no content is valid; |
| 3243 | as -n empty.s -o empty.o */ |
| 3244 | if (nbr_commands == 0) |
| 3245 | { |
| 3246 | /* Layout commands (well none...) and set headers command fields. */ |
| 3247 | return bfd_mach_o_layout_commands (mdata); |
| 3248 | } |
| 3249 | |
| 3250 | /* Create commands for segments (and symtabs), prepend them. */ |
| 3251 | commands = bfd_zalloc (abfd, nbr_commands * sizeof (bfd_mach_o_load_command)); |
| 3252 | if (commands == NULL) |
| 3253 | return FALSE; |
| 3254 | for (i = 0; i < nbr_commands - 1; i++) |
| 3255 | commands[i].next = &commands[i + 1]; |
| 3256 | commands[nbr_commands - 1].next = mdata->first_command; |
| 3257 | if (mdata->first_command == NULL) |
| 3258 | mdata->last_command = &commands[nbr_commands - 1]; |
| 3259 | mdata->first_command = &commands[0]; |
| 3260 | |
| 3261 | if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT && nbr_segcmd != 0) |
| 3262 | { |
| 3263 | /* For object file, there is only one segment. */ |
| 3264 | bfd_mach_o_init_segment (mdata, &commands[0], "", mdata->nsects); |
| 3265 | } |
| 3266 | else if (nbr_segcmd != 0) |
| 3267 | { |
| 3268 | bfd_mach_o_load_command *cmd; |
| 3269 | |
| 3270 | BFD_ASSERT (nbr_segcmd >= 2); |
| 3271 | |
| 3272 | /* The pagezero. */ |
| 3273 | cmd = &commands[0]; |
| 3274 | bfd_mach_o_init_segment (mdata, cmd, "__PAGEZERO", 0); |
| 3275 | |
| 3276 | /* Segments from sections. */ |
| 3277 | cmd++; |
| 3278 | for (i = 0; i < mdata->nsects;) |
| 3279 | { |
| 3280 | const char *segname = mdata->sections[i]->segname; |
| 3281 | unsigned int nbr_sect = 1; |
| 3282 | |
| 3283 | /* Count number of sections for this segment. */ |
| 3284 | for (i++; i < mdata->nsects; i++) |
| 3285 | if (strcmp (mdata->sections[i]->segname, segname) == 0) |
| 3286 | nbr_sect++; |
| 3287 | else |
| 3288 | break; |
| 3289 | |
| 3290 | bfd_mach_o_init_segment (mdata, cmd, segname, nbr_sect); |
| 3291 | cmd++; |
| 3292 | } |
| 3293 | |
| 3294 | /* The linkedit. */ |
| 3295 | bfd_mach_o_init_segment (mdata, cmd, "__LINKEDIT", 0); |
| 3296 | } |
| 3297 | |
| 3298 | if (symtab_idx >= 0) |
| 3299 | { |
| 3300 | /* Init symtab command. */ |
| 3301 | bfd_mach_o_load_command *cmd = &commands[symtab_idx]; |
| 3302 | |
| 3303 | cmd->type = BFD_MACH_O_LC_SYMTAB; |
| 3304 | cmd->type_required = FALSE; |
| 3305 | } |
| 3306 | |
| 3307 | /* If required, setup symtab command, see comment above about the quality |
| 3308 | of this test. */ |
| 3309 | if (dysymtab_idx >= 0) |
| 3310 | { |
| 3311 | bfd_mach_o_load_command *cmd = &commands[dysymtab_idx]; |
| 3312 | |
| 3313 | cmd->type = BFD_MACH_O_LC_DYSYMTAB; |
| 3314 | cmd->type_required = FALSE; |
| 3315 | } |
| 3316 | |
| 3317 | /* Create the main command. */ |
| 3318 | if (main_idx >= 0) |
| 3319 | { |
| 3320 | bfd_mach_o_load_command *cmd = &commands[main_idx]; |
| 3321 | |
| 3322 | cmd->type = BFD_MACH_O_LC_MAIN; |
| 3323 | cmd->type_required = TRUE; |
| 3324 | |
| 3325 | cmd->command.main.entryoff = 0; |
| 3326 | cmd->command.main.stacksize = 0; |
| 3327 | } |
| 3328 | |
| 3329 | /* Layout commands. */ |
| 3330 | if (! bfd_mach_o_layout_commands (mdata)) |
| 3331 | return FALSE; |
| 3332 | |
| 3333 | /* So, now we have sized the commands and the filelen set to that. |
| 3334 | Now we can build the segment command and set the section file offsets. */ |
| 3335 | if (mdata->header.filetype == BFD_MACH_O_MH_OBJECT) |
| 3336 | { |
| 3337 | for (i = 0; i < nbr_segcmd; i++) |
| 3338 | if (!bfd_mach_o_build_obj_seg_command |
| 3339 | (abfd, &commands[i].command.segment)) |
| 3340 | return FALSE; |
| 3341 | } |
| 3342 | else |
| 3343 | { |
| 3344 | bfd_vma maxvma = 0; |
| 3345 | |
| 3346 | /* Skip pagezero and linkedit segments. */ |
| 3347 | for (i = 1; i < nbr_segcmd - 1; i++) |
| 3348 | { |
| 3349 | bfd_mach_o_segment_command *seg = &commands[i].command.segment; |
| 3350 | |
| 3351 | if (!bfd_mach_o_build_exec_seg_command (abfd, seg)) |
| 3352 | return FALSE; |
| 3353 | |
| 3354 | if (seg->vmaddr + seg->vmsize > maxvma) |
| 3355 | maxvma = seg->vmaddr + seg->vmsize; |
| 3356 | } |
| 3357 | |
| 3358 | /* Set the size of __PAGEZERO. */ |
| 3359 | commands[0].command.segment.vmsize = |
| 3360 | commands[1].command.segment.vmaddr; |
| 3361 | |
| 3362 | /* Set the vma and fileoff of __LINKEDIT. */ |
| 3363 | commands[nbr_segcmd - 1].command.segment.vmaddr = maxvma; |
| 3364 | commands[nbr_segcmd - 1].command.segment.fileoff = mdata->filelen; |
| 3365 | |
| 3366 | /* Set entry point (once segments have been laid out). */ |
| 3367 | if (main_idx >= 0) |
| 3368 | commands[main_idx].command.main.entryoff = |
| 3369 | bfd_get_start_address (abfd) - commands[1].command.segment.vmaddr; |
| 3370 | } |
| 3371 | |
| 3372 | return TRUE; |
| 3373 | } |
| 3374 | |
| 3375 | /* Set the contents of a section. */ |
| 3376 | |
| 3377 | bfd_boolean |
| 3378 | bfd_mach_o_set_section_contents (bfd *abfd, |
| 3379 | asection *section, |
| 3380 | const void * location, |
| 3381 | file_ptr offset, |
| 3382 | bfd_size_type count) |
| 3383 | { |
| 3384 | file_ptr pos; |
| 3385 | |
| 3386 | /* Trying to write the first section contents will trigger the creation of |
| 3387 | the load commands if they are not already present. */ |
| 3388 | if (!abfd->output_has_begun && !bfd_mach_o_build_commands (abfd)) |
| 3389 | return FALSE; |
| 3390 | |
| 3391 | if (count == 0) |
| 3392 | return TRUE; |
| 3393 | |
| 3394 | pos = section->filepos + offset; |
| 3395 | if (bfd_seek (abfd, pos, SEEK_SET) != 0 |
| 3396 | || bfd_bwrite (location, count, abfd) != count) |
| 3397 | return FALSE; |
| 3398 | |
| 3399 | return TRUE; |
| 3400 | } |
| 3401 | |
| 3402 | int |
| 3403 | bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, |
| 3404 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 3405 | { |
| 3406 | return 0; |
| 3407 | } |
| 3408 | |
| 3409 | /* Make an empty symbol. This is required only because |
| 3410 | bfd_make_section_anyway wants to create a symbol for the section. */ |
| 3411 | |
| 3412 | asymbol * |
| 3413 | bfd_mach_o_make_empty_symbol (bfd *abfd) |
| 3414 | { |
| 3415 | asymbol *new_symbol; |
| 3416 | |
| 3417 | new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol)); |
| 3418 | if (new_symbol == NULL) |
| 3419 | return new_symbol; |
| 3420 | new_symbol->the_bfd = abfd; |
| 3421 | new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET; |
| 3422 | return new_symbol; |
| 3423 | } |
| 3424 | |
| 3425 | static bfd_boolean |
| 3426 | bfd_mach_o_read_header (bfd *abfd, file_ptr hdr_off, bfd_mach_o_header *header) |
| 3427 | { |
| 3428 | struct mach_o_header_external raw; |
| 3429 | unsigned int size; |
| 3430 | bfd_vma (*get32) (const void *) = NULL; |
| 3431 | |
| 3432 | /* Just read the magic number. */ |
| 3433 | if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 |
| 3434 | || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4) |
| 3435 | return FALSE; |
| 3436 | |
| 3437 | if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC) |
| 3438 | { |
| 3439 | header->byteorder = BFD_ENDIAN_BIG; |
| 3440 | header->magic = BFD_MACH_O_MH_MAGIC; |
| 3441 | header->version = 1; |
| 3442 | get32 = bfd_getb32; |
| 3443 | } |
| 3444 | else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC) |
| 3445 | { |
| 3446 | header->byteorder = BFD_ENDIAN_LITTLE; |
| 3447 | header->magic = BFD_MACH_O_MH_MAGIC; |
| 3448 | header->version = 1; |
| 3449 | get32 = bfd_getl32; |
| 3450 | } |
| 3451 | else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) |
| 3452 | { |
| 3453 | header->byteorder = BFD_ENDIAN_BIG; |
| 3454 | header->magic = BFD_MACH_O_MH_MAGIC_64; |
| 3455 | header->version = 2; |
| 3456 | get32 = bfd_getb32; |
| 3457 | } |
| 3458 | else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) |
| 3459 | { |
| 3460 | header->byteorder = BFD_ENDIAN_LITTLE; |
| 3461 | header->magic = BFD_MACH_O_MH_MAGIC_64; |
| 3462 | header->version = 2; |
| 3463 | get32 = bfd_getl32; |
| 3464 | } |
| 3465 | else |
| 3466 | { |
| 3467 | header->byteorder = BFD_ENDIAN_UNKNOWN; |
| 3468 | return FALSE; |
| 3469 | } |
| 3470 | |
| 3471 | /* Once the size of the header is known, read the full header. */ |
| 3472 | size = mach_o_wide_p (header) ? |
| 3473 | BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; |
| 3474 | |
| 3475 | if (bfd_seek (abfd, hdr_off, SEEK_SET) != 0 |
| 3476 | || bfd_bread (&raw, size, abfd) != size) |
| 3477 | return FALSE; |
| 3478 | |
| 3479 | header->cputype = (*get32) (raw.cputype); |
| 3480 | header->cpusubtype = (*get32) (raw.cpusubtype); |
| 3481 | header->filetype = (*get32) (raw.filetype); |
| 3482 | header->ncmds = (*get32) (raw.ncmds); |
| 3483 | header->sizeofcmds = (*get32) (raw.sizeofcmds); |
| 3484 | header->flags = (*get32) (raw.flags); |
| 3485 | |
| 3486 | if (mach_o_wide_p (header)) |
| 3487 | header->reserved = (*get32) (raw.reserved); |
| 3488 | else |
| 3489 | header->reserved = 0; |
| 3490 | |
| 3491 | return TRUE; |
| 3492 | } |
| 3493 | |
| 3494 | bfd_boolean |
| 3495 | bfd_mach_o_new_section_hook (bfd *abfd, asection *sec) |
| 3496 | { |
| 3497 | bfd_mach_o_section *s; |
| 3498 | unsigned bfdalign = bfd_get_section_alignment (abfd, sec); |
| 3499 | |
| 3500 | s = bfd_mach_o_get_mach_o_section (sec); |
| 3501 | if (s == NULL) |
| 3502 | { |
| 3503 | flagword bfd_flags; |
| 3504 | static const mach_o_section_name_xlat * xlat; |
| 3505 | |
| 3506 | s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s)); |
| 3507 | if (s == NULL) |
| 3508 | return FALSE; |
| 3509 | sec->used_by_bfd = s; |
| 3510 | s->bfdsection = sec; |
| 3511 | |
| 3512 | /* Create the Darwin seg/sect name pair from the bfd name. |
| 3513 | If this is a canonical name for which a specific paiting exists |
| 3514 | there will also be defined flags, type, attribute and alignment |
| 3515 | values. */ |
| 3516 | xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s); |
| 3517 | if (xlat != NULL) |
| 3518 | { |
| 3519 | s->flags = xlat->macho_sectype | xlat->macho_secattr; |
| 3520 | s->align = xlat->sectalign > bfdalign ? xlat->sectalign |
| 3521 | : bfdalign; |
| 3522 | (void) bfd_set_section_alignment (abfd, sec, s->align); |
| 3523 | bfd_flags = bfd_get_section_flags (abfd, sec); |
| 3524 | if (bfd_flags == SEC_NO_FLAGS) |
| 3525 | bfd_set_section_flags (abfd, sec, xlat->bfd_flags); |
| 3526 | } |
| 3527 | else |
| 3528 | /* Create default flags. */ |
| 3529 | bfd_mach_o_set_section_flags_from_bfd (abfd, sec); |
| 3530 | } |
| 3531 | |
| 3532 | return _bfd_generic_new_section_hook (abfd, sec); |
| 3533 | } |
| 3534 | |
| 3535 | static void |
| 3536 | bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec, |
| 3537 | unsigned long prot) |
| 3538 | { |
| 3539 | flagword flags; |
| 3540 | bfd_mach_o_section *section; |
| 3541 | |
| 3542 | flags = bfd_get_section_flags (abfd, sec); |
| 3543 | section = bfd_mach_o_get_mach_o_section (sec); |
| 3544 | |
| 3545 | /* TODO: see if we should use the xlat system for doing this by |
| 3546 | preference and fall back to this for unknown sections. */ |
| 3547 | |
| 3548 | if (flags == SEC_NO_FLAGS) |
| 3549 | { |
| 3550 | /* Try to guess flags. */ |
| 3551 | if (section->flags & BFD_MACH_O_S_ATTR_DEBUG) |
| 3552 | flags = SEC_DEBUGGING; |
| 3553 | else |
| 3554 | { |
| 3555 | flags = SEC_ALLOC; |
| 3556 | if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK) |
| 3557 | != BFD_MACH_O_S_ZEROFILL) |
| 3558 | { |
| 3559 | flags |= SEC_LOAD; |
| 3560 | if (prot & BFD_MACH_O_PROT_EXECUTE) |
| 3561 | flags |= SEC_CODE; |
| 3562 | if (prot & BFD_MACH_O_PROT_WRITE) |
| 3563 | flags |= SEC_DATA; |
| 3564 | else if (prot & BFD_MACH_O_PROT_READ) |
| 3565 | flags |= SEC_READONLY; |
| 3566 | } |
| 3567 | } |
| 3568 | } |
| 3569 | else |
| 3570 | { |
| 3571 | if ((flags & SEC_DEBUGGING) == 0) |
| 3572 | flags |= SEC_ALLOC; |
| 3573 | } |
| 3574 | |
| 3575 | if (section->offset != 0) |
| 3576 | flags |= SEC_HAS_CONTENTS; |
| 3577 | if (section->nreloc != 0) |
| 3578 | flags |= SEC_RELOC; |
| 3579 | |
| 3580 | bfd_set_section_flags (abfd, sec, flags); |
| 3581 | |
| 3582 | sec->vma = section->addr; |
| 3583 | sec->lma = section->addr; |
| 3584 | sec->size = section->size; |
| 3585 | sec->filepos = section->offset; |
| 3586 | sec->alignment_power = section->align; |
| 3587 | sec->segment_mark = 0; |
| 3588 | sec->reloc_count = section->nreloc; |
| 3589 | sec->rel_filepos = section->reloff; |
| 3590 | } |
| 3591 | |
| 3592 | static asection * |
| 3593 | bfd_mach_o_make_bfd_section (bfd *abfd, |
| 3594 | const unsigned char *segname, |
| 3595 | const unsigned char *sectname) |
| 3596 | { |
| 3597 | const char *sname; |
| 3598 | flagword flags; |
| 3599 | |
| 3600 | bfd_mach_o_convert_section_name_to_bfd |
| 3601 | (abfd, (const char *)segname, (const char *)sectname, &sname, &flags); |
| 3602 | if (sname == NULL) |
| 3603 | return NULL; |
| 3604 | |
| 3605 | return bfd_make_section_anyway_with_flags (abfd, sname, flags); |
| 3606 | } |
| 3607 | |
| 3608 | static asection * |
| 3609 | bfd_mach_o_read_section_32 (bfd *abfd, unsigned long prot) |
| 3610 | { |
| 3611 | struct mach_o_section_32_external raw; |
| 3612 | asection *sec; |
| 3613 | bfd_mach_o_section *section; |
| 3614 | |
| 3615 | if (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd) |
| 3616 | != BFD_MACH_O_SECTION_SIZE) |
| 3617 | return NULL; |
| 3618 | |
| 3619 | sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); |
| 3620 | if (sec == NULL) |
| 3621 | return NULL; |
| 3622 | |
| 3623 | section = bfd_mach_o_get_mach_o_section (sec); |
| 3624 | memcpy (section->segname, raw.segname, sizeof (raw.segname)); |
| 3625 | section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; |
| 3626 | memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); |
| 3627 | section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; |
| 3628 | section->addr = bfd_h_get_32 (abfd, raw.addr); |
| 3629 | section->size = bfd_h_get_32 (abfd, raw.size); |
| 3630 | section->offset = bfd_h_get_32 (abfd, raw.offset); |
| 3631 | section->align = bfd_h_get_32 (abfd, raw.align); |
| 3632 | /* PR 17512: file: 0017eb76. */ |
| 3633 | if (section->align > 64) |
| 3634 | { |
| 3635 | _bfd_error_handler |
| 3636 | (_("bfd_mach_o_read_section_32: overlarge alignment value: %#lx, " |
| 3637 | "using 32 instead"), section->align); |
| 3638 | section->align = 32; |
| 3639 | } |
| 3640 | section->reloff = bfd_h_get_32 (abfd, raw.reloff); |
| 3641 | section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); |
| 3642 | section->flags = bfd_h_get_32 (abfd, raw.flags); |
| 3643 | section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); |
| 3644 | section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); |
| 3645 | section->reserved3 = 0; |
| 3646 | |
| 3647 | bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); |
| 3648 | |
| 3649 | return sec; |
| 3650 | } |
| 3651 | |
| 3652 | static asection * |
| 3653 | bfd_mach_o_read_section_64 (bfd *abfd, unsigned long prot) |
| 3654 | { |
| 3655 | struct mach_o_section_64_external raw; |
| 3656 | asection *sec; |
| 3657 | bfd_mach_o_section *section; |
| 3658 | |
| 3659 | if (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) |
| 3660 | != BFD_MACH_O_SECTION_64_SIZE) |
| 3661 | return NULL; |
| 3662 | |
| 3663 | sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); |
| 3664 | if (sec == NULL) |
| 3665 | return NULL; |
| 3666 | |
| 3667 | section = bfd_mach_o_get_mach_o_section (sec); |
| 3668 | memcpy (section->segname, raw.segname, sizeof (raw.segname)); |
| 3669 | section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; |
| 3670 | memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); |
| 3671 | section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; |
| 3672 | section->addr = bfd_h_get_64 (abfd, raw.addr); |
| 3673 | section->size = bfd_h_get_64 (abfd, raw.size); |
| 3674 | section->offset = bfd_h_get_32 (abfd, raw.offset); |
| 3675 | section->align = bfd_h_get_32 (abfd, raw.align); |
| 3676 | if (section->align > 64) |
| 3677 | { |
| 3678 | _bfd_error_handler |
| 3679 | (_("bfd_mach_o_read_section_64: overlarge alignment value: %#lx, " |
| 3680 | "using 32 instead"), section->align); |
| 3681 | section->align = 32; |
| 3682 | } |
| 3683 | section->reloff = bfd_h_get_32 (abfd, raw.reloff); |
| 3684 | section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); |
| 3685 | section->flags = bfd_h_get_32 (abfd, raw.flags); |
| 3686 | section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); |
| 3687 | section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); |
| 3688 | section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3); |
| 3689 | |
| 3690 | bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); |
| 3691 | |
| 3692 | return sec; |
| 3693 | } |
| 3694 | |
| 3695 | static asection * |
| 3696 | bfd_mach_o_read_section (bfd *abfd, unsigned long prot, unsigned int wide) |
| 3697 | { |
| 3698 | if (wide) |
| 3699 | return bfd_mach_o_read_section_64 (abfd, prot); |
| 3700 | else |
| 3701 | return bfd_mach_o_read_section_32 (abfd, prot); |
| 3702 | } |
| 3703 | |
| 3704 | static bfd_boolean |
| 3705 | bfd_mach_o_read_symtab_symbol (bfd *abfd, |
| 3706 | bfd_mach_o_symtab_command *sym, |
| 3707 | bfd_mach_o_asymbol *s, |
| 3708 | unsigned long i) |
| 3709 | { |
| 3710 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 3711 | unsigned int wide = mach_o_wide_p (&mdata->header); |
| 3712 | unsigned int symwidth = |
| 3713 | wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; |
| 3714 | unsigned int symoff = sym->symoff + (i * symwidth); |
| 3715 | struct mach_o_nlist_64_external raw; |
| 3716 | unsigned char type = -1; |
| 3717 | unsigned char section = -1; |
| 3718 | short desc = -1; |
| 3719 | symvalue value = -1; |
| 3720 | unsigned long stroff = -1; |
| 3721 | unsigned int symtype = -1; |
| 3722 | |
| 3723 | BFD_ASSERT (sym->strtab != NULL); |
| 3724 | |
| 3725 | if (bfd_seek (abfd, symoff, SEEK_SET) != 0 |
| 3726 | || bfd_bread (&raw, symwidth, abfd) != symwidth) |
| 3727 | { |
| 3728 | _bfd_error_handler |
| 3729 | /* xgettext:c-format */ |
| 3730 | (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %u"), |
| 3731 | symwidth, symoff); |
| 3732 | return FALSE; |
| 3733 | } |
| 3734 | |
| 3735 | stroff = bfd_h_get_32 (abfd, raw.n_strx); |
| 3736 | type = bfd_h_get_8 (abfd, raw.n_type); |
| 3737 | symtype = type & BFD_MACH_O_N_TYPE; |
| 3738 | section = bfd_h_get_8 (abfd, raw.n_sect); |
| 3739 | desc = bfd_h_get_16 (abfd, raw.n_desc); |
| 3740 | if (wide) |
| 3741 | value = bfd_h_get_64 (abfd, raw.n_value); |
| 3742 | else |
| 3743 | value = bfd_h_get_32 (abfd, raw.n_value); |
| 3744 | |
| 3745 | if (stroff >= sym->strsize) |
| 3746 | { |
| 3747 | _bfd_error_handler |
| 3748 | /* xgettext:c-format */ |
| 3749 | (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %u)"), |
| 3750 | stroff, |
| 3751 | sym->strsize); |
| 3752 | return FALSE; |
| 3753 | } |
| 3754 | |
| 3755 | s->symbol.the_bfd = abfd; |
| 3756 | s->symbol.name = sym->strtab + stroff; |
| 3757 | s->symbol.value = value; |
| 3758 | s->symbol.flags = 0x0; |
| 3759 | s->symbol.udata.i = i; |
| 3760 | s->n_type = type; |
| 3761 | s->n_sect = section; |
| 3762 | s->n_desc = desc; |
| 3763 | |
| 3764 | if (type & BFD_MACH_O_N_STAB) |
| 3765 | { |
| 3766 | s->symbol.flags |= BSF_DEBUGGING; |
| 3767 | s->symbol.section = bfd_und_section_ptr; |
| 3768 | switch (type) |
| 3769 | { |
| 3770 | case N_FUN: |
| 3771 | case N_STSYM: |
| 3772 | case N_LCSYM: |
| 3773 | case N_BNSYM: |
| 3774 | case N_SLINE: |
| 3775 | case N_ENSYM: |
| 3776 | case N_ECOMM: |
| 3777 | case N_ECOML: |
| 3778 | case N_GSYM: |
| 3779 | if ((section > 0) && (section <= mdata->nsects)) |
| 3780 | { |
| 3781 | s->symbol.section = mdata->sections[section - 1]->bfdsection; |
| 3782 | s->symbol.value = |
| 3783 | s->symbol.value - mdata->sections[section - 1]->addr; |
| 3784 | } |
| 3785 | break; |
| 3786 | } |
| 3787 | } |
| 3788 | else |
| 3789 | { |
| 3790 | if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)) |
| 3791 | s->symbol.flags |= BSF_GLOBAL; |
| 3792 | else |
| 3793 | s->symbol.flags |= BSF_LOCAL; |
| 3794 | |
| 3795 | switch (symtype) |
| 3796 | { |
| 3797 | case BFD_MACH_O_N_UNDF: |
| 3798 | if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT) |
| 3799 | && s->symbol.value != 0) |
| 3800 | { |
| 3801 | /* A common symbol. */ |
| 3802 | s->symbol.section = bfd_com_section_ptr; |
| 3803 | s->symbol.flags = BSF_NO_FLAGS; |
| 3804 | } |
| 3805 | else |
| 3806 | { |
| 3807 | s->symbol.section = bfd_und_section_ptr; |
| 3808 | if (s->n_desc & BFD_MACH_O_N_WEAK_REF) |
| 3809 | s->symbol.flags |= BSF_WEAK; |
| 3810 | } |
| 3811 | break; |
| 3812 | case BFD_MACH_O_N_PBUD: |
| 3813 | s->symbol.section = bfd_und_section_ptr; |
| 3814 | break; |
| 3815 | case BFD_MACH_O_N_ABS: |
| 3816 | s->symbol.section = bfd_abs_section_ptr; |
| 3817 | break; |
| 3818 | case BFD_MACH_O_N_SECT: |
| 3819 | if ((section > 0) && (section <= mdata->nsects)) |
| 3820 | { |
| 3821 | s->symbol.section = mdata->sections[section - 1]->bfdsection; |
| 3822 | s->symbol.value = |
| 3823 | s->symbol.value - mdata->sections[section - 1]->addr; |
| 3824 | } |
| 3825 | else |
| 3826 | { |
| 3827 | /* Mach-O uses 0 to mean "no section"; not an error. */ |
| 3828 | if (section != 0) |
| 3829 | { |
| 3830 | _bfd_error_handler |
| 3831 | /* xgettext:c-format */ |
| 3832 | (_("bfd_mach_o_read_symtab_symbol: " |
| 3833 | "symbol \"%s\" specified invalid section %d (max %lu): " |
| 3834 | "setting to undefined"), |
| 3835 | s->symbol.name, section, mdata->nsects); |
| 3836 | } |
| 3837 | s->symbol.section = bfd_und_section_ptr; |
| 3838 | } |
| 3839 | break; |
| 3840 | case BFD_MACH_O_N_INDR: |
| 3841 | /* FIXME: we don't follow the BFD convention as this indirect symbol |
| 3842 | won't be followed by the referenced one. This looks harmless |
| 3843 | unless we start using the linker. */ |
| 3844 | s->symbol.flags |= BSF_INDIRECT; |
| 3845 | s->symbol.section = bfd_ind_section_ptr; |
| 3846 | s->symbol.value = 0; |
| 3847 | break; |
| 3848 | default: |
| 3849 | _bfd_error_handler |
| 3850 | /* xgettext:c-format */ |
| 3851 | (_("bfd_mach_o_read_symtab_symbol: " |
| 3852 | "symbol \"%s\" specified invalid type field 0x%x: " |
| 3853 | "setting to undefined"), s->symbol.name, symtype); |
| 3854 | s->symbol.section = bfd_und_section_ptr; |
| 3855 | break; |
| 3856 | } |
| 3857 | } |
| 3858 | |
| 3859 | return TRUE; |
| 3860 | } |
| 3861 | |
| 3862 | bfd_boolean |
| 3863 | bfd_mach_o_read_symtab_strtab (bfd *abfd) |
| 3864 | { |
| 3865 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 3866 | bfd_mach_o_symtab_command *sym = mdata->symtab; |
| 3867 | |
| 3868 | /* Fail if there is no symtab. */ |
| 3869 | if (sym == NULL) |
| 3870 | return FALSE; |
| 3871 | |
| 3872 | /* Success if already loaded. */ |
| 3873 | if (sym->strtab) |
| 3874 | return TRUE; |
| 3875 | |
| 3876 | if (abfd->flags & BFD_IN_MEMORY) |
| 3877 | { |
| 3878 | struct bfd_in_memory *b; |
| 3879 | |
| 3880 | b = (struct bfd_in_memory *) abfd->iostream; |
| 3881 | |
| 3882 | if ((sym->stroff + sym->strsize) > b->size) |
| 3883 | { |
| 3884 | bfd_set_error (bfd_error_file_truncated); |
| 3885 | return FALSE; |
| 3886 | } |
| 3887 | sym->strtab = (char *) b->buffer + sym->stroff; |
| 3888 | } |
| 3889 | else |
| 3890 | { |
| 3891 | /* See PR 21840 for a reproducer. */ |
| 3892 | if ((sym->strsize + 1) == 0) |
| 3893 | return FALSE; |
| 3894 | sym->strtab = bfd_alloc (abfd, sym->strsize + 1); |
| 3895 | if (sym->strtab == NULL) |
| 3896 | return FALSE; |
| 3897 | |
| 3898 | if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0 |
| 3899 | || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize) |
| 3900 | { |
| 3901 | /* PR 17512: file: 10888-1609-0.004. */ |
| 3902 | bfd_release (abfd, sym->strtab); |
| 3903 | sym->strtab = NULL; |
| 3904 | bfd_set_error (bfd_error_file_truncated); |
| 3905 | return FALSE; |
| 3906 | } |
| 3907 | /* Zero terminate the string table. */ |
| 3908 | sym->strtab[sym->strsize] = 0; |
| 3909 | } |
| 3910 | |
| 3911 | return TRUE; |
| 3912 | } |
| 3913 | |
| 3914 | bfd_boolean |
| 3915 | bfd_mach_o_read_symtab_symbols (bfd *abfd) |
| 3916 | { |
| 3917 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 3918 | bfd_mach_o_symtab_command *sym = mdata->symtab; |
| 3919 | unsigned long i; |
| 3920 | |
| 3921 | if (sym == NULL || sym->symbols) |
| 3922 | /* Return now if there are no symbols or if already loaded. */ |
| 3923 | return TRUE; |
| 3924 | |
| 3925 | sym->symbols = bfd_alloc2 (abfd, sym->nsyms, sizeof (bfd_mach_o_asymbol)); |
| 3926 | if (sym->symbols == NULL) |
| 3927 | { |
| 3928 | _bfd_error_handler (_("bfd_mach_o_read_symtab_symbols: " |
| 3929 | "unable to allocate memory for symbols")); |
| 3930 | sym->nsyms = 0; |
| 3931 | return FALSE; |
| 3932 | } |
| 3933 | |
| 3934 | if (!bfd_mach_o_read_symtab_strtab (abfd)) |
| 3935 | goto fail; |
| 3936 | |
| 3937 | for (i = 0; i < sym->nsyms; i++) |
| 3938 | if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i)) |
| 3939 | goto fail; |
| 3940 | |
| 3941 | return TRUE; |
| 3942 | |
| 3943 | fail: |
| 3944 | bfd_release (abfd, sym->symbols); |
| 3945 | sym->symbols = NULL; |
| 3946 | sym->nsyms = 0; |
| 3947 | return FALSE; |
| 3948 | } |
| 3949 | |
| 3950 | static const char * |
| 3951 | bfd_mach_o_i386_flavour_string (unsigned int flavour) |
| 3952 | { |
| 3953 | switch ((int) flavour) |
| 3954 | { |
| 3955 | case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32"; |
| 3956 | case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32"; |
| 3957 | case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32"; |
| 3958 | case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64"; |
| 3959 | case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64"; |
| 3960 | case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64"; |
| 3961 | case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE"; |
| 3962 | case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE"; |
| 3963 | case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE"; |
| 3964 | case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32"; |
| 3965 | case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64"; |
| 3966 | case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE"; |
| 3967 | case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE"; |
| 3968 | default: return "UNKNOWN"; |
| 3969 | } |
| 3970 | } |
| 3971 | |
| 3972 | static const char * |
| 3973 | bfd_mach_o_ppc_flavour_string (unsigned int flavour) |
| 3974 | { |
| 3975 | switch ((int) flavour) |
| 3976 | { |
| 3977 | case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE"; |
| 3978 | case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE"; |
| 3979 | case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE"; |
| 3980 | case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE"; |
| 3981 | case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64"; |
| 3982 | case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64"; |
| 3983 | default: return "UNKNOWN"; |
| 3984 | } |
| 3985 | } |
| 3986 | |
| 3987 | static bfd_boolean |
| 3988 | bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command) |
| 3989 | { |
| 3990 | bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; |
| 3991 | struct mach_o_str_command_external raw; |
| 3992 | unsigned int nameoff; |
| 3993 | unsigned int namelen; |
| 3994 | |
| 3995 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 3996 | return FALSE; |
| 3997 | |
| 3998 | nameoff = bfd_h_get_32 (abfd, raw.str); |
| 3999 | |
| 4000 | cmd->name_offset = nameoff; |
| 4001 | namelen = command->len - nameoff; |
| 4002 | nameoff += command->offset; |
| 4003 | cmd->name_str = bfd_alloc (abfd, namelen); |
| 4004 | if (cmd->name_str == NULL) |
| 4005 | return FALSE; |
| 4006 | if (bfd_seek (abfd, nameoff, SEEK_SET) != 0 |
| 4007 | || bfd_bread (cmd->name_str, namelen, abfd) != namelen) |
| 4008 | return FALSE; |
| 4009 | return TRUE; |
| 4010 | } |
| 4011 | |
| 4012 | static bfd_boolean |
| 4013 | bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) |
| 4014 | { |
| 4015 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4016 | bfd_mach_o_dylib_command *cmd = &command->command.dylib; |
| 4017 | struct mach_o_dylib_command_external raw; |
| 4018 | unsigned int nameoff; |
| 4019 | unsigned int namelen; |
| 4020 | |
| 4021 | switch (command->type) |
| 4022 | { |
| 4023 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 4024 | case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: |
| 4025 | case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: |
| 4026 | case BFD_MACH_O_LC_ID_DYLIB: |
| 4027 | case BFD_MACH_O_LC_REEXPORT_DYLIB: |
| 4028 | case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: |
| 4029 | break; |
| 4030 | default: |
| 4031 | BFD_FAIL (); |
| 4032 | return FALSE; |
| 4033 | } |
| 4034 | |
| 4035 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4036 | return FALSE; |
| 4037 | |
| 4038 | nameoff = bfd_h_get_32 (abfd, raw.name); |
| 4039 | cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp); |
| 4040 | cmd->current_version = bfd_h_get_32 (abfd, raw.current_version); |
| 4041 | cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version); |
| 4042 | |
| 4043 | cmd->name_offset = command->offset + nameoff; |
| 4044 | namelen = command->len - nameoff; |
| 4045 | cmd->name_str = bfd_alloc (abfd, namelen); |
| 4046 | if (cmd->name_str == NULL) |
| 4047 | return FALSE; |
| 4048 | if (bfd_seek (abfd, mdata->hdr_offset + cmd->name_offset, SEEK_SET) != 0 |
| 4049 | || bfd_bread (cmd->name_str, namelen, abfd) != namelen) |
| 4050 | return FALSE; |
| 4051 | return TRUE; |
| 4052 | } |
| 4053 | |
| 4054 | static bfd_boolean |
| 4055 | bfd_mach_o_read_prebound_dylib (bfd *abfd, |
| 4056 | bfd_mach_o_load_command *command) |
| 4057 | { |
| 4058 | bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; |
| 4059 | struct mach_o_prebound_dylib_command_external raw; |
| 4060 | unsigned int nameoff; |
| 4061 | unsigned int modoff; |
| 4062 | unsigned int str_len; |
| 4063 | unsigned char *str; |
| 4064 | |
| 4065 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4066 | return FALSE; |
| 4067 | |
| 4068 | nameoff = bfd_h_get_32 (abfd, raw.name); |
| 4069 | modoff = bfd_h_get_32 (abfd, raw.linked_modules); |
| 4070 | if (nameoff > command->len || modoff > command->len) |
| 4071 | return FALSE; |
| 4072 | |
| 4073 | str_len = command->len - sizeof (raw); |
| 4074 | str = bfd_alloc (abfd, str_len); |
| 4075 | if (str == NULL) |
| 4076 | return FALSE; |
| 4077 | if (bfd_bread (str, str_len, abfd) != str_len) |
| 4078 | return FALSE; |
| 4079 | |
| 4080 | cmd->name_offset = command->offset + nameoff; |
| 4081 | cmd->nmodules = bfd_h_get_32 (abfd, raw.nmodules); |
| 4082 | cmd->linked_modules_offset = command->offset + modoff; |
| 4083 | |
| 4084 | cmd->name_str = (char *)str + nameoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); |
| 4085 | cmd->linked_modules = str + modoff - (sizeof (raw) + BFD_MACH_O_LC_SIZE); |
| 4086 | return TRUE; |
| 4087 | } |
| 4088 | |
| 4089 | static bfd_boolean |
| 4090 | bfd_mach_o_read_prebind_cksum (bfd *abfd, |
| 4091 | bfd_mach_o_load_command *command) |
| 4092 | { |
| 4093 | bfd_mach_o_prebind_cksum_command *cmd = &command->command.prebind_cksum; |
| 4094 | struct mach_o_prebind_cksum_command_external raw; |
| 4095 | |
| 4096 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4097 | return FALSE; |
| 4098 | |
| 4099 | cmd->cksum = bfd_get_32 (abfd, raw.cksum); |
| 4100 | return TRUE; |
| 4101 | } |
| 4102 | |
| 4103 | static bfd_boolean |
| 4104 | bfd_mach_o_read_twolevel_hints (bfd *abfd, |
| 4105 | bfd_mach_o_load_command *command) |
| 4106 | { |
| 4107 | bfd_mach_o_twolevel_hints_command *cmd = &command->command.twolevel_hints; |
| 4108 | struct mach_o_twolevel_hints_command_external raw; |
| 4109 | |
| 4110 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4111 | return FALSE; |
| 4112 | |
| 4113 | cmd->offset = bfd_get_32 (abfd, raw.offset); |
| 4114 | cmd->nhints = bfd_get_32 (abfd, raw.nhints); |
| 4115 | return TRUE; |
| 4116 | } |
| 4117 | |
| 4118 | static bfd_boolean |
| 4119 | bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command) |
| 4120 | { |
| 4121 | bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib; |
| 4122 | struct mach_o_fvmlib_command_external raw; |
| 4123 | unsigned int nameoff; |
| 4124 | unsigned int namelen; |
| 4125 | |
| 4126 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4127 | return FALSE; |
| 4128 | |
| 4129 | nameoff = bfd_h_get_32 (abfd, raw.name); |
| 4130 | fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version); |
| 4131 | fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr); |
| 4132 | |
| 4133 | fvm->name_offset = command->offset + nameoff; |
| 4134 | namelen = command->len - nameoff; |
| 4135 | fvm->name_str = bfd_alloc (abfd, namelen); |
| 4136 | if (fvm->name_str == NULL) |
| 4137 | return FALSE; |
| 4138 | if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0 |
| 4139 | || bfd_bread (fvm->name_str, namelen, abfd) != namelen) |
| 4140 | return FALSE; |
| 4141 | return TRUE; |
| 4142 | } |
| 4143 | |
| 4144 | static bfd_boolean |
| 4145 | bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command) |
| 4146 | { |
| 4147 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4148 | bfd_mach_o_thread_command *cmd = &command->command.thread; |
| 4149 | unsigned int offset; |
| 4150 | unsigned int nflavours; |
| 4151 | unsigned int i; |
| 4152 | |
| 4153 | BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) |
| 4154 | || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); |
| 4155 | |
| 4156 | /* Count the number of threads. */ |
| 4157 | offset = 8; |
| 4158 | nflavours = 0; |
| 4159 | while (offset != command->len) |
| 4160 | { |
| 4161 | struct mach_o_thread_command_external raw; |
| 4162 | |
| 4163 | if (offset >= command->len) |
| 4164 | return FALSE; |
| 4165 | |
| 4166 | if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 |
| 4167 | || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4168 | return FALSE; |
| 4169 | |
| 4170 | offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4; |
| 4171 | nflavours++; |
| 4172 | } |
| 4173 | |
| 4174 | /* Allocate threads. */ |
| 4175 | cmd->flavours = bfd_alloc2 |
| 4176 | (abfd, nflavours, sizeof (bfd_mach_o_thread_flavour)); |
| 4177 | if (cmd->flavours == NULL) |
| 4178 | return FALSE; |
| 4179 | cmd->nflavours = nflavours; |
| 4180 | |
| 4181 | offset = 8; |
| 4182 | nflavours = 0; |
| 4183 | while (offset != command->len) |
| 4184 | { |
| 4185 | struct mach_o_thread_command_external raw; |
| 4186 | |
| 4187 | if (offset >= command->len) |
| 4188 | return FALSE; |
| 4189 | |
| 4190 | if (nflavours >= cmd->nflavours) |
| 4191 | return FALSE; |
| 4192 | |
| 4193 | if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 |
| 4194 | || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4195 | return FALSE; |
| 4196 | |
| 4197 | cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour); |
| 4198 | cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw); |
| 4199 | cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4; |
| 4200 | offset += cmd->flavours[nflavours].size + sizeof (raw); |
| 4201 | nflavours++; |
| 4202 | } |
| 4203 | |
| 4204 | for (i = 0; i < nflavours; i++) |
| 4205 | { |
| 4206 | asection *bfdsec; |
| 4207 | unsigned int snamelen; |
| 4208 | char *sname; |
| 4209 | const char *flavourstr; |
| 4210 | const char *prefix = "LC_THREAD"; |
| 4211 | unsigned int j = 0; |
| 4212 | |
| 4213 | switch (mdata->header.cputype) |
| 4214 | { |
| 4215 | case BFD_MACH_O_CPU_TYPE_POWERPC: |
| 4216 | case BFD_MACH_O_CPU_TYPE_POWERPC_64: |
| 4217 | flavourstr = |
| 4218 | bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); |
| 4219 | break; |
| 4220 | case BFD_MACH_O_CPU_TYPE_I386: |
| 4221 | case BFD_MACH_O_CPU_TYPE_X86_64: |
| 4222 | flavourstr = |
| 4223 | bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour); |
| 4224 | break; |
| 4225 | default: |
| 4226 | flavourstr = "UNKNOWN_ARCHITECTURE"; |
| 4227 | break; |
| 4228 | } |
| 4229 | |
| 4230 | snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1; |
| 4231 | sname = bfd_alloc (abfd, snamelen); |
| 4232 | if (sname == NULL) |
| 4233 | return FALSE; |
| 4234 | |
| 4235 | for (;;) |
| 4236 | { |
| 4237 | sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); |
| 4238 | if (bfd_get_section_by_name (abfd, sname) == NULL) |
| 4239 | break; |
| 4240 | j++; |
| 4241 | } |
| 4242 | |
| 4243 | bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS); |
| 4244 | |
| 4245 | bfdsec->vma = 0; |
| 4246 | bfdsec->lma = 0; |
| 4247 | bfdsec->size = cmd->flavours[i].size; |
| 4248 | bfdsec->filepos = cmd->flavours[i].offset; |
| 4249 | bfdsec->alignment_power = 0x0; |
| 4250 | |
| 4251 | cmd->section = bfdsec; |
| 4252 | } |
| 4253 | |
| 4254 | return TRUE; |
| 4255 | } |
| 4256 | |
| 4257 | static bfd_boolean |
| 4258 | bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) |
| 4259 | { |
| 4260 | bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; |
| 4261 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4262 | |
| 4263 | BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); |
| 4264 | |
| 4265 | { |
| 4266 | struct mach_o_dysymtab_command_external raw; |
| 4267 | |
| 4268 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4269 | return FALSE; |
| 4270 | |
| 4271 | cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym); |
| 4272 | cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym); |
| 4273 | cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym); |
| 4274 | cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym); |
| 4275 | cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym); |
| 4276 | cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym); |
| 4277 | cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff); |
| 4278 | cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc); |
| 4279 | cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff); |
| 4280 | cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab); |
| 4281 | cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff); |
| 4282 | cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms); |
| 4283 | cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff); |
| 4284 | cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms); |
| 4285 | cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff); |
| 4286 | cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel); |
| 4287 | cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff); |
| 4288 | cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel); |
| 4289 | } |
| 4290 | |
| 4291 | if (cmd->nmodtab != 0) |
| 4292 | { |
| 4293 | unsigned int i; |
| 4294 | int wide = bfd_mach_o_wide_p (abfd); |
| 4295 | unsigned int module_len = wide ? 56 : 52; |
| 4296 | |
| 4297 | cmd->dylib_module = |
| 4298 | bfd_alloc2 (abfd, cmd->nmodtab, sizeof (bfd_mach_o_dylib_module)); |
| 4299 | if (cmd->dylib_module == NULL) |
| 4300 | return FALSE; |
| 4301 | |
| 4302 | if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) |
| 4303 | return FALSE; |
| 4304 | |
| 4305 | for (i = 0; i < cmd->nmodtab; i++) |
| 4306 | { |
| 4307 | bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; |
| 4308 | unsigned long v; |
| 4309 | unsigned char buf[56]; |
| 4310 | |
| 4311 | if (bfd_bread ((void *) buf, module_len, abfd) != module_len) |
| 4312 | return FALSE; |
| 4313 | |
| 4314 | module->module_name_idx = bfd_h_get_32 (abfd, buf + 0); |
| 4315 | module->iextdefsym = bfd_h_get_32 (abfd, buf + 4); |
| 4316 | module->nextdefsym = bfd_h_get_32 (abfd, buf + 8); |
| 4317 | module->irefsym = bfd_h_get_32 (abfd, buf + 12); |
| 4318 | module->nrefsym = bfd_h_get_32 (abfd, buf + 16); |
| 4319 | module->ilocalsym = bfd_h_get_32 (abfd, buf + 20); |
| 4320 | module->nlocalsym = bfd_h_get_32 (abfd, buf + 24); |
| 4321 | module->iextrel = bfd_h_get_32 (abfd, buf + 28); |
| 4322 | module->nextrel = bfd_h_get_32 (abfd, buf + 32); |
| 4323 | v = bfd_h_get_32 (abfd, buf +36); |
| 4324 | module->iinit = v & 0xffff; |
| 4325 | module->iterm = (v >> 16) & 0xffff; |
| 4326 | v = bfd_h_get_32 (abfd, buf + 40); |
| 4327 | module->ninit = v & 0xffff; |
| 4328 | module->nterm = (v >> 16) & 0xffff; |
| 4329 | if (wide) |
| 4330 | { |
| 4331 | module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44); |
| 4332 | module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48); |
| 4333 | } |
| 4334 | else |
| 4335 | { |
| 4336 | module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44); |
| 4337 | module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48); |
| 4338 | } |
| 4339 | } |
| 4340 | } |
| 4341 | |
| 4342 | if (cmd->ntoc != 0) |
| 4343 | { |
| 4344 | unsigned long i; |
| 4345 | |
| 4346 | cmd->dylib_toc = bfd_alloc2 |
| 4347 | (abfd, cmd->ntoc, sizeof (bfd_mach_o_dylib_table_of_content)); |
| 4348 | if (cmd->dylib_toc == NULL) |
| 4349 | return FALSE; |
| 4350 | |
| 4351 | if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) |
| 4352 | return FALSE; |
| 4353 | |
| 4354 | for (i = 0; i < cmd->ntoc; i++) |
| 4355 | { |
| 4356 | struct mach_o_dylib_table_of_contents_external raw; |
| 4357 | bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i]; |
| 4358 | |
| 4359 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4360 | return FALSE; |
| 4361 | |
| 4362 | toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index); |
| 4363 | toc->module_index = bfd_h_get_32 (abfd, raw.module_index); |
| 4364 | } |
| 4365 | } |
| 4366 | |
| 4367 | if (cmd->nindirectsyms != 0) |
| 4368 | { |
| 4369 | unsigned int i; |
| 4370 | |
| 4371 | cmd->indirect_syms = bfd_alloc2 |
| 4372 | (abfd, cmd->nindirectsyms, sizeof (unsigned int)); |
| 4373 | if (cmd->indirect_syms == NULL) |
| 4374 | return FALSE; |
| 4375 | |
| 4376 | if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) |
| 4377 | return FALSE; |
| 4378 | |
| 4379 | for (i = 0; i < cmd->nindirectsyms; i++) |
| 4380 | { |
| 4381 | unsigned char raw[4]; |
| 4382 | unsigned int *is = &cmd->indirect_syms[i]; |
| 4383 | |
| 4384 | if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4385 | return FALSE; |
| 4386 | |
| 4387 | *is = bfd_h_get_32 (abfd, raw); |
| 4388 | } |
| 4389 | } |
| 4390 | |
| 4391 | if (cmd->nextrefsyms != 0) |
| 4392 | { |
| 4393 | unsigned long v; |
| 4394 | unsigned int i; |
| 4395 | |
| 4396 | cmd->ext_refs = bfd_alloc2 |
| 4397 | (abfd, cmd->nextrefsyms, sizeof (bfd_mach_o_dylib_reference)); |
| 4398 | if (cmd->ext_refs == NULL) |
| 4399 | return FALSE; |
| 4400 | |
| 4401 | if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) |
| 4402 | return FALSE; |
| 4403 | |
| 4404 | for (i = 0; i < cmd->nextrefsyms; i++) |
| 4405 | { |
| 4406 | unsigned char raw[4]; |
| 4407 | bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; |
| 4408 | |
| 4409 | if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4410 | return FALSE; |
| 4411 | |
| 4412 | /* Fields isym and flags are written as bit-fields, thus we need |
| 4413 | a specific processing for endianness. */ |
| 4414 | v = bfd_h_get_32 (abfd, raw); |
| 4415 | if (bfd_big_endian (abfd)) |
| 4416 | { |
| 4417 | ref->isym = (v >> 8) & 0xffffff; |
| 4418 | ref->flags = v & 0xff; |
| 4419 | } |
| 4420 | else |
| 4421 | { |
| 4422 | ref->isym = v & 0xffffff; |
| 4423 | ref->flags = (v >> 24) & 0xff; |
| 4424 | } |
| 4425 | } |
| 4426 | } |
| 4427 | |
| 4428 | if (mdata->dysymtab) |
| 4429 | return FALSE; |
| 4430 | mdata->dysymtab = cmd; |
| 4431 | |
| 4432 | return TRUE; |
| 4433 | } |
| 4434 | |
| 4435 | static bfd_boolean |
| 4436 | bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) |
| 4437 | { |
| 4438 | bfd_mach_o_symtab_command *symtab = &command->command.symtab; |
| 4439 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4440 | struct mach_o_symtab_command_external raw; |
| 4441 | |
| 4442 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); |
| 4443 | |
| 4444 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4445 | return FALSE; |
| 4446 | |
| 4447 | symtab->symoff = bfd_h_get_32 (abfd, raw.symoff); |
| 4448 | symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms); |
| 4449 | symtab->stroff = bfd_h_get_32 (abfd, raw.stroff); |
| 4450 | symtab->strsize = bfd_h_get_32 (abfd, raw.strsize); |
| 4451 | symtab->symbols = NULL; |
| 4452 | symtab->strtab = NULL; |
| 4453 | |
| 4454 | if (symtab->nsyms != 0) |
| 4455 | abfd->flags |= HAS_SYMS; |
| 4456 | |
| 4457 | if (mdata->symtab) |
| 4458 | return FALSE; |
| 4459 | mdata->symtab = symtab; |
| 4460 | return TRUE; |
| 4461 | } |
| 4462 | |
| 4463 | static bfd_boolean |
| 4464 | bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command) |
| 4465 | { |
| 4466 | bfd_mach_o_uuid_command *cmd = &command->command.uuid; |
| 4467 | |
| 4468 | BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID); |
| 4469 | |
| 4470 | if (bfd_bread (cmd->uuid, 16, abfd) != 16) |
| 4471 | return FALSE; |
| 4472 | |
| 4473 | return TRUE; |
| 4474 | } |
| 4475 | |
| 4476 | static bfd_boolean |
| 4477 | bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command) |
| 4478 | { |
| 4479 | bfd_mach_o_linkedit_command *cmd = &command->command.linkedit; |
| 4480 | struct mach_o_linkedit_data_command_external raw; |
| 4481 | |
| 4482 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4483 | return FALSE; |
| 4484 | |
| 4485 | cmd->dataoff = bfd_get_32 (abfd, raw.dataoff); |
| 4486 | cmd->datasize = bfd_get_32 (abfd, raw.datasize); |
| 4487 | return TRUE; |
| 4488 | } |
| 4489 | |
| 4490 | static bfd_boolean |
| 4491 | bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command) |
| 4492 | { |
| 4493 | bfd_mach_o_str_command *cmd = &command->command.str; |
| 4494 | struct mach_o_str_command_external raw; |
| 4495 | unsigned long off; |
| 4496 | |
| 4497 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4498 | return FALSE; |
| 4499 | |
| 4500 | off = bfd_get_32 (abfd, raw.str); |
| 4501 | cmd->stroff = command->offset + off; |
| 4502 | cmd->str_len = command->len - off; |
| 4503 | cmd->str = bfd_alloc (abfd, cmd->str_len); |
| 4504 | if (cmd->str == NULL) |
| 4505 | return FALSE; |
| 4506 | if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0 |
| 4507 | || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len) |
| 4508 | return FALSE; |
| 4509 | return TRUE; |
| 4510 | } |
| 4511 | |
| 4512 | static unsigned char * |
| 4513 | bfd_mach_o_alloc_and_read (bfd *abfd, unsigned int off, unsigned int size) |
| 4514 | { |
| 4515 | unsigned char *buf; |
| 4516 | |
| 4517 | buf = bfd_alloc (abfd, size); |
| 4518 | if (buf == NULL) |
| 4519 | return NULL; |
| 4520 | if (bfd_seek (abfd, off, SEEK_SET) != 0 |
| 4521 | || bfd_bread (buf, size, abfd) != size) |
| 4522 | return NULL; |
| 4523 | return buf; |
| 4524 | } |
| 4525 | |
| 4526 | static bfd_boolean |
| 4527 | bfd_mach_o_read_dyld_content (bfd *abfd, bfd_mach_o_dyld_info_command *cmd) |
| 4528 | { |
| 4529 | /* Read rebase content. */ |
| 4530 | if (cmd->rebase_content == NULL && cmd->rebase_size != 0) |
| 4531 | { |
| 4532 | cmd->rebase_content = |
| 4533 | bfd_mach_o_alloc_and_read (abfd, cmd->rebase_off, cmd->rebase_size); |
| 4534 | if (cmd->rebase_content == NULL) |
| 4535 | return FALSE; |
| 4536 | } |
| 4537 | |
| 4538 | /* Read bind content. */ |
| 4539 | if (cmd->bind_content == NULL && cmd->bind_size != 0) |
| 4540 | { |
| 4541 | cmd->bind_content = |
| 4542 | bfd_mach_o_alloc_and_read (abfd, cmd->bind_off, cmd->bind_size); |
| 4543 | if (cmd->bind_content == NULL) |
| 4544 | return FALSE; |
| 4545 | } |
| 4546 | |
| 4547 | /* Read weak bind content. */ |
| 4548 | if (cmd->weak_bind_content == NULL && cmd->weak_bind_size != 0) |
| 4549 | { |
| 4550 | cmd->weak_bind_content = bfd_mach_o_alloc_and_read |
| 4551 | (abfd, cmd->weak_bind_off, cmd->weak_bind_size); |
| 4552 | if (cmd->weak_bind_content == NULL) |
| 4553 | return FALSE; |
| 4554 | } |
| 4555 | |
| 4556 | /* Read lazy bind content. */ |
| 4557 | if (cmd->lazy_bind_content == NULL && cmd->lazy_bind_size != 0) |
| 4558 | { |
| 4559 | cmd->lazy_bind_content = bfd_mach_o_alloc_and_read |
| 4560 | (abfd, cmd->lazy_bind_off, cmd->lazy_bind_size); |
| 4561 | if (cmd->lazy_bind_content == NULL) |
| 4562 | return FALSE; |
| 4563 | } |
| 4564 | |
| 4565 | /* Read export content. */ |
| 4566 | if (cmd->export_content == NULL && cmd->export_size != 0) |
| 4567 | { |
| 4568 | cmd->export_content = bfd_mach_o_alloc_and_read |
| 4569 | (abfd, cmd->export_off, cmd->export_size); |
| 4570 | if (cmd->export_content == NULL) |
| 4571 | return FALSE; |
| 4572 | } |
| 4573 | |
| 4574 | return TRUE; |
| 4575 | } |
| 4576 | |
| 4577 | static bfd_boolean |
| 4578 | bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) |
| 4579 | { |
| 4580 | bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; |
| 4581 | struct mach_o_dyld_info_command_external raw; |
| 4582 | |
| 4583 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4584 | return FALSE; |
| 4585 | |
| 4586 | cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off); |
| 4587 | cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size); |
| 4588 | cmd->rebase_content = NULL; |
| 4589 | cmd->bind_off = bfd_get_32 (abfd, raw.bind_off); |
| 4590 | cmd->bind_size = bfd_get_32 (abfd, raw.bind_size); |
| 4591 | cmd->bind_content = NULL; |
| 4592 | cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off); |
| 4593 | cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size); |
| 4594 | cmd->weak_bind_content = NULL; |
| 4595 | cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off); |
| 4596 | cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size); |
| 4597 | cmd->lazy_bind_content = NULL; |
| 4598 | cmd->export_off = bfd_get_32 (abfd, raw.export_off); |
| 4599 | cmd->export_size = bfd_get_32 (abfd, raw.export_size); |
| 4600 | cmd->export_content = NULL; |
| 4601 | return TRUE; |
| 4602 | } |
| 4603 | |
| 4604 | static bfd_boolean |
| 4605 | bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command) |
| 4606 | { |
| 4607 | bfd_mach_o_version_min_command *cmd = &command->command.version_min; |
| 4608 | struct mach_o_version_min_command_external raw; |
| 4609 | |
| 4610 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4611 | return FALSE; |
| 4612 | |
| 4613 | cmd->version = bfd_get_32 (abfd, raw.version); |
| 4614 | cmd->sdk = bfd_get_32 (abfd, raw.sdk); |
| 4615 | return TRUE; |
| 4616 | } |
| 4617 | |
| 4618 | static bfd_boolean |
| 4619 | bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command) |
| 4620 | { |
| 4621 | bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; |
| 4622 | struct mach_o_encryption_info_command_external raw; |
| 4623 | |
| 4624 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4625 | return FALSE; |
| 4626 | |
| 4627 | cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); |
| 4628 | cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); |
| 4629 | cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); |
| 4630 | return TRUE; |
| 4631 | } |
| 4632 | |
| 4633 | static bfd_boolean |
| 4634 | bfd_mach_o_read_encryption_info_64 (bfd *abfd, bfd_mach_o_load_command *command) |
| 4635 | { |
| 4636 | bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info; |
| 4637 | struct mach_o_encryption_info_64_command_external raw; |
| 4638 | |
| 4639 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4640 | return FALSE; |
| 4641 | |
| 4642 | cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff); |
| 4643 | cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize); |
| 4644 | cmd->cryptid = bfd_get_32 (abfd, raw.cryptid); |
| 4645 | return TRUE; |
| 4646 | } |
| 4647 | |
| 4648 | static bfd_boolean |
| 4649 | bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command) |
| 4650 | { |
| 4651 | bfd_mach_o_main_command *cmd = &command->command.main; |
| 4652 | struct mach_o_entry_point_command_external raw; |
| 4653 | |
| 4654 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4655 | return FALSE; |
| 4656 | |
| 4657 | cmd->entryoff = bfd_get_64 (abfd, raw.entryoff); |
| 4658 | cmd->stacksize = bfd_get_64 (abfd, raw.stacksize); |
| 4659 | return TRUE; |
| 4660 | } |
| 4661 | |
| 4662 | static bfd_boolean |
| 4663 | bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command) |
| 4664 | { |
| 4665 | bfd_mach_o_source_version_command *cmd = &command->command.source_version; |
| 4666 | struct mach_o_source_version_command_external raw; |
| 4667 | bfd_uint64_t ver; |
| 4668 | |
| 4669 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4670 | return FALSE; |
| 4671 | |
| 4672 | ver = bfd_get_64 (abfd, raw.version); |
| 4673 | /* Note: we use a serie of shift to avoid shift > 32 (for which gcc |
| 4674 | generates warnings) in case of the host doesn't support 64 bit |
| 4675 | integers. */ |
| 4676 | cmd->e = ver & 0x3ff; |
| 4677 | ver >>= 10; |
| 4678 | cmd->d = ver & 0x3ff; |
| 4679 | ver >>= 10; |
| 4680 | cmd->c = ver & 0x3ff; |
| 4681 | ver >>= 10; |
| 4682 | cmd->b = ver & 0x3ff; |
| 4683 | ver >>= 10; |
| 4684 | cmd->a = ver & 0xffffff; |
| 4685 | return TRUE; |
| 4686 | } |
| 4687 | |
| 4688 | static bfd_boolean |
| 4689 | bfd_mach_o_read_note (bfd *abfd, bfd_mach_o_load_command *command) |
| 4690 | { |
| 4691 | bfd_mach_o_note_command *cmd = &command->command.note; |
| 4692 | struct mach_o_note_command_external raw; |
| 4693 | |
| 4694 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4695 | return FALSE; |
| 4696 | |
| 4697 | memcpy (cmd->data_owner, raw.data_owner, 16); |
| 4698 | cmd->offset = bfd_get_64 (abfd, raw.offset); |
| 4699 | cmd->size = bfd_get_64 (abfd, raw.size); |
| 4700 | return TRUE; |
| 4701 | } |
| 4702 | |
| 4703 | static bfd_boolean |
| 4704 | bfd_mach_o_read_build_version (bfd *abfd, bfd_mach_o_load_command *command) |
| 4705 | { |
| 4706 | bfd_mach_o_build_version_command *cmd = &command->command.build_version; |
| 4707 | struct mach_o_build_version_command_external raw; |
| 4708 | |
| 4709 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4710 | return FALSE; |
| 4711 | |
| 4712 | cmd->platform = bfd_get_32 (abfd, raw.platform); |
| 4713 | cmd->minos = bfd_get_32 (abfd, raw.minos); |
| 4714 | cmd->sdk = bfd_get_32 (abfd, raw.sdk); |
| 4715 | cmd->ntools = bfd_get_32 (abfd, raw.ntools); |
| 4716 | return TRUE; |
| 4717 | } |
| 4718 | |
| 4719 | static bfd_boolean |
| 4720 | bfd_mach_o_read_segment (bfd *abfd, |
| 4721 | bfd_mach_o_load_command *command, |
| 4722 | unsigned int wide) |
| 4723 | { |
| 4724 | bfd_mach_o_segment_command *seg = &command->command.segment; |
| 4725 | unsigned long i; |
| 4726 | |
| 4727 | if (wide) |
| 4728 | { |
| 4729 | struct mach_o_segment_command_64_external raw; |
| 4730 | |
| 4731 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); |
| 4732 | |
| 4733 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4734 | return FALSE; |
| 4735 | |
| 4736 | memcpy (seg->segname, raw.segname, 16); |
| 4737 | seg->segname[16] = '\0'; |
| 4738 | |
| 4739 | seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr); |
| 4740 | seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize); |
| 4741 | seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff); |
| 4742 | seg->filesize = bfd_h_get_64 (abfd, raw.filesize); |
| 4743 | seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); |
| 4744 | seg->initprot = bfd_h_get_32 (abfd, raw.initprot); |
| 4745 | seg->nsects = bfd_h_get_32 (abfd, raw.nsects); |
| 4746 | seg->flags = bfd_h_get_32 (abfd, raw.flags); |
| 4747 | } |
| 4748 | else |
| 4749 | { |
| 4750 | struct mach_o_segment_command_32_external raw; |
| 4751 | |
| 4752 | BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); |
| 4753 | |
| 4754 | if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) |
| 4755 | return FALSE; |
| 4756 | |
| 4757 | memcpy (seg->segname, raw.segname, 16); |
| 4758 | seg->segname[16] = '\0'; |
| 4759 | |
| 4760 | seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr); |
| 4761 | seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize); |
| 4762 | seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff); |
| 4763 | seg->filesize = bfd_h_get_32 (abfd, raw.filesize); |
| 4764 | seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); |
| 4765 | seg->initprot = bfd_h_get_32 (abfd, raw.initprot); |
| 4766 | seg->nsects = bfd_h_get_32 (abfd, raw.nsects); |
| 4767 | seg->flags = bfd_h_get_32 (abfd, raw.flags); |
| 4768 | } |
| 4769 | seg->sect_head = NULL; |
| 4770 | seg->sect_tail = NULL; |
| 4771 | |
| 4772 | for (i = 0; i < seg->nsects; i++) |
| 4773 | { |
| 4774 | asection *sec; |
| 4775 | |
| 4776 | sec = bfd_mach_o_read_section (abfd, seg->initprot, wide); |
| 4777 | if (sec == NULL) |
| 4778 | return FALSE; |
| 4779 | |
| 4780 | bfd_mach_o_append_section_to_segment |
| 4781 | (seg, bfd_mach_o_get_mach_o_section (sec)); |
| 4782 | } |
| 4783 | |
| 4784 | return TRUE; |
| 4785 | } |
| 4786 | |
| 4787 | static bfd_boolean |
| 4788 | bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) |
| 4789 | { |
| 4790 | return bfd_mach_o_read_segment (abfd, command, 0); |
| 4791 | } |
| 4792 | |
| 4793 | static bfd_boolean |
| 4794 | bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) |
| 4795 | { |
| 4796 | return bfd_mach_o_read_segment (abfd, command, 1); |
| 4797 | } |
| 4798 | |
| 4799 | static bfd_boolean |
| 4800 | bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command) |
| 4801 | { |
| 4802 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4803 | struct mach_o_load_command_external raw; |
| 4804 | unsigned int cmd; |
| 4805 | |
| 4806 | /* Read command type and length. */ |
| 4807 | if (bfd_seek (abfd, mdata->hdr_offset + command->offset, SEEK_SET) != 0 |
| 4808 | || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE) |
| 4809 | return FALSE; |
| 4810 | |
| 4811 | cmd = bfd_h_get_32 (abfd, raw.cmd); |
| 4812 | command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD; |
| 4813 | command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE; |
| 4814 | command->len = bfd_h_get_32 (abfd, raw.cmdsize); |
| 4815 | |
| 4816 | switch (command->type) |
| 4817 | { |
| 4818 | case BFD_MACH_O_LC_SEGMENT: |
| 4819 | if (!bfd_mach_o_read_segment_32 (abfd, command)) |
| 4820 | return FALSE; |
| 4821 | break; |
| 4822 | case BFD_MACH_O_LC_SEGMENT_64: |
| 4823 | if (!bfd_mach_o_read_segment_64 (abfd, command)) |
| 4824 | return FALSE; |
| 4825 | break; |
| 4826 | case BFD_MACH_O_LC_SYMTAB: |
| 4827 | if (!bfd_mach_o_read_symtab (abfd, command)) |
| 4828 | return FALSE; |
| 4829 | break; |
| 4830 | case BFD_MACH_O_LC_SYMSEG: |
| 4831 | break; |
| 4832 | case BFD_MACH_O_LC_THREAD: |
| 4833 | case BFD_MACH_O_LC_UNIXTHREAD: |
| 4834 | if (!bfd_mach_o_read_thread (abfd, command)) |
| 4835 | return FALSE; |
| 4836 | break; |
| 4837 | case BFD_MACH_O_LC_LOAD_DYLINKER: |
| 4838 | case BFD_MACH_O_LC_ID_DYLINKER: |
| 4839 | case BFD_MACH_O_LC_DYLD_ENVIRONMENT: |
| 4840 | if (!bfd_mach_o_read_dylinker (abfd, command)) |
| 4841 | return FALSE; |
| 4842 | break; |
| 4843 | case BFD_MACH_O_LC_LOAD_DYLIB: |
| 4844 | case BFD_MACH_O_LC_LAZY_LOAD_DYLIB: |
| 4845 | case BFD_MACH_O_LC_ID_DYLIB: |
| 4846 | case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: |
| 4847 | case BFD_MACH_O_LC_REEXPORT_DYLIB: |
| 4848 | case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: |
| 4849 | if (!bfd_mach_o_read_dylib (abfd, command)) |
| 4850 | return FALSE; |
| 4851 | break; |
| 4852 | case BFD_MACH_O_LC_PREBOUND_DYLIB: |
| 4853 | if (!bfd_mach_o_read_prebound_dylib (abfd, command)) |
| 4854 | return FALSE; |
| 4855 | break; |
| 4856 | case BFD_MACH_O_LC_LOADFVMLIB: |
| 4857 | case BFD_MACH_O_LC_IDFVMLIB: |
| 4858 | if (!bfd_mach_o_read_fvmlib (abfd, command)) |
| 4859 | return FALSE; |
| 4860 | break; |
| 4861 | case BFD_MACH_O_LC_IDENT: |
| 4862 | case BFD_MACH_O_LC_FVMFILE: |
| 4863 | case BFD_MACH_O_LC_PREPAGE: |
| 4864 | case BFD_MACH_O_LC_ROUTINES: |
| 4865 | case BFD_MACH_O_LC_ROUTINES_64: |
| 4866 | break; |
| 4867 | case BFD_MACH_O_LC_SUB_FRAMEWORK: |
| 4868 | case BFD_MACH_O_LC_SUB_UMBRELLA: |
| 4869 | case BFD_MACH_O_LC_SUB_LIBRARY: |
| 4870 | case BFD_MACH_O_LC_SUB_CLIENT: |
| 4871 | case BFD_MACH_O_LC_RPATH: |
| 4872 | if (!bfd_mach_o_read_str (abfd, command)) |
| 4873 | return FALSE; |
| 4874 | break; |
| 4875 | case BFD_MACH_O_LC_DYSYMTAB: |
| 4876 | if (!bfd_mach_o_read_dysymtab (abfd, command)) |
| 4877 | return FALSE; |
| 4878 | break; |
| 4879 | case BFD_MACH_O_LC_PREBIND_CKSUM: |
| 4880 | if (!bfd_mach_o_read_prebind_cksum (abfd, command)) |
| 4881 | return FALSE; |
| 4882 | break; |
| 4883 | case BFD_MACH_O_LC_TWOLEVEL_HINTS: |
| 4884 | if (!bfd_mach_o_read_twolevel_hints (abfd, command)) |
| 4885 | return FALSE; |
| 4886 | break; |
| 4887 | case BFD_MACH_O_LC_UUID: |
| 4888 | if (!bfd_mach_o_read_uuid (abfd, command)) |
| 4889 | return FALSE; |
| 4890 | break; |
| 4891 | case BFD_MACH_O_LC_CODE_SIGNATURE: |
| 4892 | case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO: |
| 4893 | case BFD_MACH_O_LC_FUNCTION_STARTS: |
| 4894 | case BFD_MACH_O_LC_DATA_IN_CODE: |
| 4895 | case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS: |
| 4896 | case BFD_MACH_O_LC_LINKER_OPTIMIZATION_HINT: |
| 4897 | if (!bfd_mach_o_read_linkedit (abfd, command)) |
| 4898 | return FALSE; |
| 4899 | break; |
| 4900 | case BFD_MACH_O_LC_ENCRYPTION_INFO: |
| 4901 | if (!bfd_mach_o_read_encryption_info (abfd, command)) |
| 4902 | return FALSE; |
| 4903 | break; |
| 4904 | case BFD_MACH_O_LC_ENCRYPTION_INFO_64: |
| 4905 | if (!bfd_mach_o_read_encryption_info_64 (abfd, command)) |
| 4906 | return FALSE; |
| 4907 | break; |
| 4908 | case BFD_MACH_O_LC_DYLD_INFO: |
| 4909 | if (!bfd_mach_o_read_dyld_info (abfd, command)) |
| 4910 | return FALSE; |
| 4911 | break; |
| 4912 | case BFD_MACH_O_LC_VERSION_MIN_MACOSX: |
| 4913 | case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS: |
| 4914 | case BFD_MACH_O_LC_VERSION_MIN_WATCHOS: |
| 4915 | case BFD_MACH_O_LC_VERSION_MIN_TVOS: |
| 4916 | if (!bfd_mach_o_read_version_min (abfd, command)) |
| 4917 | return FALSE; |
| 4918 | break; |
| 4919 | case BFD_MACH_O_LC_MAIN: |
| 4920 | if (!bfd_mach_o_read_main (abfd, command)) |
| 4921 | return FALSE; |
| 4922 | break; |
| 4923 | case BFD_MACH_O_LC_SOURCE_VERSION: |
| 4924 | if (!bfd_mach_o_read_source_version (abfd, command)) |
| 4925 | return FALSE; |
| 4926 | break; |
| 4927 | case BFD_MACH_O_LC_LINKER_OPTIONS: |
| 4928 | break; |
| 4929 | case BFD_MACH_O_LC_NOTE: |
| 4930 | if (!bfd_mach_o_read_note (abfd, command)) |
| 4931 | return FALSE; |
| 4932 | break; |
| 4933 | case BFD_MACH_O_LC_BUILD_VERSION: |
| 4934 | if (!bfd_mach_o_read_build_version (abfd, command)) |
| 4935 | return FALSE; |
| 4936 | break; |
| 4937 | default: |
| 4938 | command->len = 0; |
| 4939 | _bfd_error_handler (_("%pB: unknown load command %#x"), |
| 4940 | abfd, command->type); |
| 4941 | return FALSE; |
| 4942 | } |
| 4943 | |
| 4944 | return TRUE; |
| 4945 | } |
| 4946 | |
| 4947 | static void |
| 4948 | bfd_mach_o_flatten_sections (bfd *abfd) |
| 4949 | { |
| 4950 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4951 | bfd_mach_o_load_command *cmd; |
| 4952 | long csect = 0; |
| 4953 | |
| 4954 | /* Count total number of sections. */ |
| 4955 | mdata->nsects = 0; |
| 4956 | |
| 4957 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 4958 | { |
| 4959 | if (cmd->type == BFD_MACH_O_LC_SEGMENT |
| 4960 | || cmd->type == BFD_MACH_O_LC_SEGMENT_64) |
| 4961 | { |
| 4962 | bfd_mach_o_segment_command *seg = &cmd->command.segment; |
| 4963 | |
| 4964 | mdata->nsects += seg->nsects; |
| 4965 | } |
| 4966 | } |
| 4967 | |
| 4968 | /* Allocate sections array. */ |
| 4969 | mdata->sections = bfd_alloc2 (abfd, |
| 4970 | mdata->nsects, sizeof (bfd_mach_o_section *)); |
| 4971 | |
| 4972 | /* Fill the array. */ |
| 4973 | csect = 0; |
| 4974 | |
| 4975 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 4976 | { |
| 4977 | if (cmd->type == BFD_MACH_O_LC_SEGMENT |
| 4978 | || cmd->type == BFD_MACH_O_LC_SEGMENT_64) |
| 4979 | { |
| 4980 | bfd_mach_o_segment_command *seg = &cmd->command.segment; |
| 4981 | bfd_mach_o_section *sec; |
| 4982 | |
| 4983 | BFD_ASSERT (csect + seg->nsects <= mdata->nsects); |
| 4984 | |
| 4985 | for (sec = seg->sect_head; sec != NULL; sec = sec->next) |
| 4986 | mdata->sections[csect++] = sec; |
| 4987 | } |
| 4988 | } |
| 4989 | } |
| 4990 | |
| 4991 | static bfd_boolean |
| 4992 | bfd_mach_o_scan_start_address (bfd *abfd) |
| 4993 | { |
| 4994 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 4995 | bfd_mach_o_thread_command *thr = NULL; |
| 4996 | bfd_mach_o_load_command *cmd; |
| 4997 | unsigned long i; |
| 4998 | |
| 4999 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 5000 | if (cmd->type == BFD_MACH_O_LC_THREAD |
| 5001 | || cmd->type == BFD_MACH_O_LC_UNIXTHREAD) |
| 5002 | { |
| 5003 | thr = &cmd->command.thread; |
| 5004 | break; |
| 5005 | } |
| 5006 | else if (cmd->type == BFD_MACH_O_LC_MAIN && mdata->nsects > 1) |
| 5007 | { |
| 5008 | bfd_mach_o_main_command *main_cmd = &cmd->command.main; |
| 5009 | bfd_mach_o_section *text_sect = mdata->sections[0]; |
| 5010 | |
| 5011 | if (text_sect) |
| 5012 | { |
| 5013 | abfd->start_address = main_cmd->entryoff |
| 5014 | + (text_sect->addr - text_sect->offset); |
| 5015 | return TRUE; |
| 5016 | } |
| 5017 | } |
| 5018 | |
| 5019 | /* An object file has no start address, so do not fail if not found. */ |
| 5020 | if (thr == NULL) |
| 5021 | return TRUE; |
| 5022 | |
| 5023 | /* FIXME: create a subtarget hook ? */ |
| 5024 | for (i = 0; i < thr->nflavours; i++) |
| 5025 | { |
| 5026 | if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386) |
| 5027 | && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE32)) |
| 5028 | { |
| 5029 | unsigned char buf[4]; |
| 5030 | |
| 5031 | if (bfd_seek (abfd, thr->flavours[i].offset + 40, SEEK_SET) != 0 |
| 5032 | || bfd_bread (buf, 4, abfd) != 4) |
| 5033 | return FALSE; |
| 5034 | |
| 5035 | abfd->start_address = bfd_h_get_32 (abfd, buf); |
| 5036 | } |
| 5037 | else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC) |
| 5038 | && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE)) |
| 5039 | { |
| 5040 | unsigned char buf[4]; |
| 5041 | |
| 5042 | if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 |
| 5043 | || bfd_bread (buf, 4, abfd) != 4) |
| 5044 | return FALSE; |
| 5045 | |
| 5046 | abfd->start_address = bfd_h_get_32 (abfd, buf); |
| 5047 | } |
| 5048 | else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64) |
| 5049 | && (thr->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64)) |
| 5050 | { |
| 5051 | unsigned char buf[8]; |
| 5052 | |
| 5053 | if (bfd_seek (abfd, thr->flavours[i].offset + 0, SEEK_SET) != 0 |
| 5054 | || bfd_bread (buf, 8, abfd) != 8) |
| 5055 | return FALSE; |
| 5056 | |
| 5057 | abfd->start_address = bfd_h_get_64 (abfd, buf); |
| 5058 | } |
| 5059 | else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64) |
| 5060 | && (thr->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64)) |
| 5061 | { |
| 5062 | unsigned char buf[8]; |
| 5063 | |
| 5064 | if (bfd_seek (abfd, thr->flavours[i].offset + (16 * 8), SEEK_SET) != 0 |
| 5065 | || bfd_bread (buf, 8, abfd) != 8) |
| 5066 | return FALSE; |
| 5067 | |
| 5068 | abfd->start_address = bfd_h_get_64 (abfd, buf); |
| 5069 | } |
| 5070 | } |
| 5071 | |
| 5072 | return TRUE; |
| 5073 | } |
| 5074 | |
| 5075 | bfd_boolean |
| 5076 | bfd_mach_o_set_arch_mach (bfd *abfd, |
| 5077 | enum bfd_architecture arch, |
| 5078 | unsigned long machine) |
| 5079 | { |
| 5080 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 5081 | |
| 5082 | /* If this isn't the right architecture for this backend, and this |
| 5083 | isn't the generic backend, fail. */ |
| 5084 | if (arch != bed->arch |
| 5085 | && arch != bfd_arch_unknown |
| 5086 | && bed->arch != bfd_arch_unknown) |
| 5087 | return FALSE; |
| 5088 | |
| 5089 | return bfd_default_set_arch_mach (abfd, arch, machine); |
| 5090 | } |
| 5091 | |
| 5092 | static bfd_boolean |
| 5093 | bfd_mach_o_scan (bfd *abfd, |
| 5094 | bfd_mach_o_header *header, |
| 5095 | bfd_mach_o_data_struct *mdata) |
| 5096 | { |
| 5097 | unsigned int i; |
| 5098 | enum bfd_architecture cputype; |
| 5099 | unsigned long cpusubtype; |
| 5100 | unsigned int hdrsize; |
| 5101 | |
| 5102 | hdrsize = mach_o_wide_p (header) ? |
| 5103 | BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; |
| 5104 | |
| 5105 | mdata->header = *header; |
| 5106 | |
| 5107 | abfd->flags = abfd->flags & BFD_IN_MEMORY; |
| 5108 | switch (header->filetype) |
| 5109 | { |
| 5110 | case BFD_MACH_O_MH_OBJECT: |
| 5111 | abfd->flags |= HAS_RELOC; |
| 5112 | break; |
| 5113 | case BFD_MACH_O_MH_EXECUTE: |
| 5114 | abfd->flags |= EXEC_P; |
| 5115 | break; |
| 5116 | case BFD_MACH_O_MH_DYLIB: |
| 5117 | case BFD_MACH_O_MH_BUNDLE: |
| 5118 | abfd->flags |= DYNAMIC; |
| 5119 | break; |
| 5120 | } |
| 5121 | |
| 5122 | abfd->tdata.mach_o_data = mdata; |
| 5123 | |
| 5124 | bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, |
| 5125 | &cputype, &cpusubtype); |
| 5126 | if (cputype == bfd_arch_unknown) |
| 5127 | { |
| 5128 | _bfd_error_handler |
| 5129 | /* xgettext:c-format */ |
| 5130 | (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"), |
| 5131 | header->cputype, header->cpusubtype); |
| 5132 | return FALSE; |
| 5133 | } |
| 5134 | |
| 5135 | bfd_set_arch_mach (abfd, cputype, cpusubtype); |
| 5136 | |
| 5137 | if (header->ncmds != 0) |
| 5138 | { |
| 5139 | bfd_mach_o_load_command *cmd; |
| 5140 | |
| 5141 | mdata->first_command = NULL; |
| 5142 | mdata->last_command = NULL; |
| 5143 | |
| 5144 | cmd = bfd_alloc2 (abfd, header->ncmds, sizeof (bfd_mach_o_load_command)); |
| 5145 | if (cmd == NULL) |
| 5146 | return FALSE; |
| 5147 | |
| 5148 | for (i = 0; i < header->ncmds; i++) |
| 5149 | { |
| 5150 | bfd_mach_o_load_command *cur = &cmd[i]; |
| 5151 | |
| 5152 | bfd_mach_o_append_command (abfd, cur); |
| 5153 | |
| 5154 | if (i == 0) |
| 5155 | cur->offset = hdrsize; |
| 5156 | else |
| 5157 | { |
| 5158 | bfd_mach_o_load_command *prev = &cmd[i - 1]; |
| 5159 | cur->offset = prev->offset + prev->len; |
| 5160 | } |
| 5161 | |
| 5162 | if (!bfd_mach_o_read_command (abfd, cur)) |
| 5163 | return FALSE; |
| 5164 | } |
| 5165 | } |
| 5166 | |
| 5167 | /* Sections should be flatten before scanning start address. */ |
| 5168 | bfd_mach_o_flatten_sections (abfd); |
| 5169 | if (!bfd_mach_o_scan_start_address (abfd)) |
| 5170 | return FALSE; |
| 5171 | |
| 5172 | return TRUE; |
| 5173 | } |
| 5174 | |
| 5175 | bfd_boolean |
| 5176 | bfd_mach_o_mkobject_init (bfd *abfd) |
| 5177 | { |
| 5178 | bfd_mach_o_data_struct *mdata = NULL; |
| 5179 | |
| 5180 | mdata = bfd_zalloc (abfd, sizeof (bfd_mach_o_data_struct)); |
| 5181 | if (mdata == NULL) |
| 5182 | return FALSE; |
| 5183 | abfd->tdata.mach_o_data = mdata; |
| 5184 | |
| 5185 | mdata->header.magic = 0; |
| 5186 | mdata->header.cputype = 0; |
| 5187 | mdata->header.cpusubtype = 0; |
| 5188 | mdata->header.filetype = 0; |
| 5189 | mdata->header.ncmds = 0; |
| 5190 | mdata->header.sizeofcmds = 0; |
| 5191 | mdata->header.flags = 0; |
| 5192 | mdata->header.byteorder = BFD_ENDIAN_UNKNOWN; |
| 5193 | mdata->first_command = NULL; |
| 5194 | mdata->last_command = NULL; |
| 5195 | mdata->nsects = 0; |
| 5196 | mdata->sections = NULL; |
| 5197 | mdata->dyn_reloc_cache = NULL; |
| 5198 | |
| 5199 | return TRUE; |
| 5200 | } |
| 5201 | |
| 5202 | static bfd_boolean |
| 5203 | bfd_mach_o_gen_mkobject (bfd *abfd) |
| 5204 | { |
| 5205 | bfd_mach_o_data_struct *mdata; |
| 5206 | |
| 5207 | if (!bfd_mach_o_mkobject_init (abfd)) |
| 5208 | return FALSE; |
| 5209 | |
| 5210 | mdata = bfd_mach_o_get_data (abfd); |
| 5211 | mdata->header.magic = BFD_MACH_O_MH_MAGIC; |
| 5212 | mdata->header.cputype = 0; |
| 5213 | mdata->header.cpusubtype = 0; |
| 5214 | mdata->header.byteorder = abfd->xvec->byteorder; |
| 5215 | mdata->header.version = 1; |
| 5216 | |
| 5217 | return TRUE; |
| 5218 | } |
| 5219 | |
| 5220 | const bfd_target * |
| 5221 | bfd_mach_o_header_p (bfd *abfd, |
| 5222 | file_ptr hdr_off, |
| 5223 | bfd_mach_o_filetype filetype, |
| 5224 | bfd_mach_o_cpu_type cputype) |
| 5225 | { |
| 5226 | bfd_mach_o_header header; |
| 5227 | bfd_mach_o_data_struct *mdata; |
| 5228 | |
| 5229 | if (!bfd_mach_o_read_header (abfd, hdr_off, &header)) |
| 5230 | goto wrong; |
| 5231 | |
| 5232 | if (! (header.byteorder == BFD_ENDIAN_BIG |
| 5233 | || header.byteorder == BFD_ENDIAN_LITTLE)) |
| 5234 | { |
| 5235 | _bfd_error_handler (_("unknown header byte-order value %#x"), |
| 5236 | header.byteorder); |
| 5237 | goto wrong; |
| 5238 | } |
| 5239 | |
| 5240 | if (! ((header.byteorder == BFD_ENDIAN_BIG |
| 5241 | && abfd->xvec->byteorder == BFD_ENDIAN_BIG |
| 5242 | && abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
| 5243 | || (header.byteorder == BFD_ENDIAN_LITTLE |
| 5244 | && abfd->xvec->byteorder == BFD_ENDIAN_LITTLE |
| 5245 | && abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))) |
| 5246 | goto wrong; |
| 5247 | |
| 5248 | /* Check cputype and filetype. |
| 5249 | In case of wildcard, do not accept magics that are handled by existing |
| 5250 | targets. */ |
| 5251 | if (cputype) |
| 5252 | { |
| 5253 | if (header.cputype != cputype) |
| 5254 | goto wrong; |
| 5255 | } |
| 5256 | else |
| 5257 | { |
| 5258 | #ifndef BFD64 |
| 5259 | /* Do not recognize 64 architectures if not configured for 64bit targets. |
| 5260 | This could happen only for generic targets. */ |
| 5261 | if (mach_o_wide_p (&header)) |
| 5262 | goto wrong; |
| 5263 | #endif |
| 5264 | } |
| 5265 | |
| 5266 | if (filetype) |
| 5267 | { |
| 5268 | if (header.filetype != filetype) |
| 5269 | goto wrong; |
| 5270 | } |
| 5271 | else |
| 5272 | { |
| 5273 | switch (header.filetype) |
| 5274 | { |
| 5275 | case BFD_MACH_O_MH_CORE: |
| 5276 | /* Handled by core_p */ |
| 5277 | goto wrong; |
| 5278 | default: |
| 5279 | break; |
| 5280 | } |
| 5281 | } |
| 5282 | |
| 5283 | mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata)); |
| 5284 | if (mdata == NULL) |
| 5285 | goto fail; |
| 5286 | mdata->hdr_offset = hdr_off; |
| 5287 | |
| 5288 | if (!bfd_mach_o_scan (abfd, &header, mdata)) |
| 5289 | goto wrong; |
| 5290 | |
| 5291 | return abfd->xvec; |
| 5292 | |
| 5293 | wrong: |
| 5294 | bfd_set_error (bfd_error_wrong_format); |
| 5295 | |
| 5296 | fail: |
| 5297 | return NULL; |
| 5298 | } |
| 5299 | |
| 5300 | static const bfd_target * |
| 5301 | bfd_mach_o_gen_object_p (bfd *abfd) |
| 5302 | { |
| 5303 | return bfd_mach_o_header_p (abfd, 0, 0, 0); |
| 5304 | } |
| 5305 | |
| 5306 | static const bfd_target * |
| 5307 | bfd_mach_o_gen_core_p (bfd *abfd) |
| 5308 | { |
| 5309 | return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_MH_CORE, 0); |
| 5310 | } |
| 5311 | |
| 5312 | /* Return the base address of ABFD, ie the address at which the image is |
| 5313 | mapped. The possible initial pagezero is ignored. */ |
| 5314 | |
| 5315 | bfd_vma |
| 5316 | bfd_mach_o_get_base_address (bfd *abfd) |
| 5317 | { |
| 5318 | bfd_mach_o_data_struct *mdata; |
| 5319 | bfd_mach_o_load_command *cmd; |
| 5320 | |
| 5321 | /* Check for Mach-O. */ |
| 5322 | if (!bfd_mach_o_valid (abfd)) |
| 5323 | return 0; |
| 5324 | mdata = bfd_mach_o_get_data (abfd); |
| 5325 | |
| 5326 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 5327 | { |
| 5328 | if ((cmd->type == BFD_MACH_O_LC_SEGMENT |
| 5329 | || cmd->type == BFD_MACH_O_LC_SEGMENT_64)) |
| 5330 | { |
| 5331 | struct bfd_mach_o_segment_command *segcmd = &cmd->command.segment; |
| 5332 | |
| 5333 | if (segcmd->initprot != 0) |
| 5334 | return segcmd->vmaddr; |
| 5335 | } |
| 5336 | } |
| 5337 | return 0; |
| 5338 | } |
| 5339 | |
| 5340 | typedef struct mach_o_fat_archentry |
| 5341 | { |
| 5342 | unsigned long cputype; |
| 5343 | unsigned long cpusubtype; |
| 5344 | unsigned long offset; |
| 5345 | unsigned long size; |
| 5346 | unsigned long align; |
| 5347 | } mach_o_fat_archentry; |
| 5348 | |
| 5349 | typedef struct mach_o_fat_data_struct |
| 5350 | { |
| 5351 | unsigned long magic; |
| 5352 | unsigned long nfat_arch; |
| 5353 | mach_o_fat_archentry *archentries; |
| 5354 | } mach_o_fat_data_struct; |
| 5355 | |
| 5356 | const bfd_target * |
| 5357 | bfd_mach_o_fat_archive_p (bfd *abfd) |
| 5358 | { |
| 5359 | mach_o_fat_data_struct *adata = NULL; |
| 5360 | struct mach_o_fat_header_external hdr; |
| 5361 | unsigned long i; |
| 5362 | |
| 5363 | if (bfd_seek (abfd, 0, SEEK_SET) != 0 |
| 5364 | || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr)) |
| 5365 | goto error; |
| 5366 | |
| 5367 | adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); |
| 5368 | if (adata == NULL) |
| 5369 | goto error; |
| 5370 | |
| 5371 | adata->magic = bfd_getb32 (hdr.magic); |
| 5372 | adata->nfat_arch = bfd_getb32 (hdr.nfat_arch); |
| 5373 | if (adata->magic != 0xcafebabe) |
| 5374 | goto error; |
| 5375 | /* Avoid matching Java bytecode files, which have the same magic number. |
| 5376 | In the Java bytecode file format this field contains the JVM version, |
| 5377 | which starts at 43.0. */ |
| 5378 | if (adata->nfat_arch > 30) |
| 5379 | goto error; |
| 5380 | |
| 5381 | adata->archentries = |
| 5382 | bfd_alloc2 (abfd, adata->nfat_arch, sizeof (mach_o_fat_archentry)); |
| 5383 | if (adata->archentries == NULL) |
| 5384 | goto error; |
| 5385 | |
| 5386 | for (i = 0; i < adata->nfat_arch; i++) |
| 5387 | { |
| 5388 | struct mach_o_fat_arch_external arch; |
| 5389 | if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch)) |
| 5390 | goto error; |
| 5391 | adata->archentries[i].cputype = bfd_getb32 (arch.cputype); |
| 5392 | adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype); |
| 5393 | adata->archentries[i].offset = bfd_getb32 (arch.offset); |
| 5394 | adata->archentries[i].size = bfd_getb32 (arch.size); |
| 5395 | adata->archentries[i].align = bfd_getb32 (arch.align); |
| 5396 | } |
| 5397 | |
| 5398 | abfd->tdata.mach_o_fat_data = adata; |
| 5399 | |
| 5400 | return abfd->xvec; |
| 5401 | |
| 5402 | error: |
| 5403 | if (adata != NULL) |
| 5404 | bfd_release (abfd, adata); |
| 5405 | bfd_set_error (bfd_error_wrong_format); |
| 5406 | return NULL; |
| 5407 | } |
| 5408 | |
| 5409 | /* Set the filename for a fat binary member ABFD, whose bfd architecture is |
| 5410 | ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY. |
| 5411 | Set arelt_data and origin fields too. */ |
| 5412 | |
| 5413 | static void |
| 5414 | bfd_mach_o_fat_member_init (bfd *abfd, |
| 5415 | enum bfd_architecture arch_type, |
| 5416 | unsigned long arch_subtype, |
| 5417 | mach_o_fat_archentry *entry) |
| 5418 | { |
| 5419 | struct areltdata *areltdata; |
| 5420 | /* Create the member filename. Use ARCH_NAME. */ |
| 5421 | const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype); |
| 5422 | |
| 5423 | if (ap) |
| 5424 | { |
| 5425 | /* Use the architecture name if known. */ |
| 5426 | abfd->filename = xstrdup (ap->printable_name); |
| 5427 | } |
| 5428 | else |
| 5429 | { |
| 5430 | /* Forge a uniq id. */ |
| 5431 | const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1; |
| 5432 | char *name = xmalloc (namelen); |
| 5433 | snprintf (name, namelen, "0x%lx-0x%lx", |
| 5434 | entry->cputype, entry->cpusubtype); |
| 5435 | abfd->filename = name; |
| 5436 | } |
| 5437 | |
| 5438 | areltdata = bfd_zmalloc (sizeof (struct areltdata)); |
| 5439 | areltdata->parsed_size = entry->size; |
| 5440 | abfd->arelt_data = areltdata; |
| 5441 | abfd->iostream = NULL; |
| 5442 | abfd->origin = entry->offset; |
| 5443 | } |
| 5444 | |
| 5445 | bfd * |
| 5446 | bfd_mach_o_fat_openr_next_archived_file (bfd *archive, bfd *prev) |
| 5447 | { |
| 5448 | mach_o_fat_data_struct *adata; |
| 5449 | mach_o_fat_archentry *entry = NULL; |
| 5450 | unsigned long i; |
| 5451 | bfd *nbfd; |
| 5452 | enum bfd_architecture arch_type; |
| 5453 | unsigned long arch_subtype; |
| 5454 | |
| 5455 | adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; |
| 5456 | BFD_ASSERT (adata != NULL); |
| 5457 | |
| 5458 | /* Find index of previous entry. */ |
| 5459 | if (prev == NULL) |
| 5460 | { |
| 5461 | /* Start at first one. */ |
| 5462 | i = 0; |
| 5463 | } |
| 5464 | else |
| 5465 | { |
| 5466 | /* Find index of PREV. */ |
| 5467 | for (i = 0; i < adata->nfat_arch; i++) |
| 5468 | { |
| 5469 | if (adata->archentries[i].offset == prev->origin) |
| 5470 | break; |
| 5471 | } |
| 5472 | |
| 5473 | if (i == adata->nfat_arch) |
| 5474 | { |
| 5475 | /* Not found. */ |
| 5476 | bfd_set_error (bfd_error_bad_value); |
| 5477 | return NULL; |
| 5478 | } |
| 5479 | |
| 5480 | /* Get next entry. */ |
| 5481 | i++; |
| 5482 | } |
| 5483 | |
| 5484 | if (i >= adata->nfat_arch) |
| 5485 | { |
| 5486 | bfd_set_error (bfd_error_no_more_archived_files); |
| 5487 | return NULL; |
| 5488 | } |
| 5489 | |
| 5490 | entry = &adata->archentries[i]; |
| 5491 | nbfd = _bfd_new_bfd_contained_in (archive); |
| 5492 | if (nbfd == NULL) |
| 5493 | return NULL; |
| 5494 | |
| 5495 | bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype, |
| 5496 | &arch_type, &arch_subtype); |
| 5497 | |
| 5498 | bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry); |
| 5499 | |
| 5500 | bfd_set_arch_mach (nbfd, arch_type, arch_subtype); |
| 5501 | |
| 5502 | return nbfd; |
| 5503 | } |
| 5504 | |
| 5505 | /* Analogous to stat call. */ |
| 5506 | |
| 5507 | static int |
| 5508 | bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf) |
| 5509 | { |
| 5510 | if (abfd->arelt_data == NULL) |
| 5511 | { |
| 5512 | bfd_set_error (bfd_error_invalid_operation); |
| 5513 | return -1; |
| 5514 | } |
| 5515 | |
| 5516 | buf->st_mtime = 0; |
| 5517 | buf->st_uid = 0; |
| 5518 | buf->st_gid = 0; |
| 5519 | buf->st_mode = 0644; |
| 5520 | buf->st_size = arelt_size (abfd); |
| 5521 | |
| 5522 | return 0; |
| 5523 | } |
| 5524 | |
| 5525 | /* If ABFD format is FORMAT and architecture is ARCH, return it. |
| 5526 | If ABFD is a fat image containing a member that corresponds to FORMAT |
| 5527 | and ARCH, returns it. |
| 5528 | In other case, returns NULL. |
| 5529 | This function allows transparent uses of fat images. */ |
| 5530 | |
| 5531 | bfd * |
| 5532 | bfd_mach_o_fat_extract (bfd *abfd, |
| 5533 | bfd_format format, |
| 5534 | const bfd_arch_info_type *arch) |
| 5535 | { |
| 5536 | bfd *res; |
| 5537 | mach_o_fat_data_struct *adata; |
| 5538 | unsigned int i; |
| 5539 | |
| 5540 | if (bfd_check_format (abfd, format)) |
| 5541 | { |
| 5542 | if (bfd_get_arch_info (abfd) == arch) |
| 5543 | return abfd; |
| 5544 | return NULL; |
| 5545 | } |
| 5546 | if (!bfd_check_format (abfd, bfd_archive) |
| 5547 | || abfd->xvec != &mach_o_fat_vec) |
| 5548 | return NULL; |
| 5549 | |
| 5550 | /* This is a Mach-O fat image. */ |
| 5551 | adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data; |
| 5552 | BFD_ASSERT (adata != NULL); |
| 5553 | |
| 5554 | for (i = 0; i < adata->nfat_arch; i++) |
| 5555 | { |
| 5556 | struct mach_o_fat_archentry *e = &adata->archentries[i]; |
| 5557 | enum bfd_architecture cpu_type; |
| 5558 | unsigned long cpu_subtype; |
| 5559 | |
| 5560 | bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype, |
| 5561 | &cpu_type, &cpu_subtype); |
| 5562 | if (cpu_type != arch->arch || cpu_subtype != arch->mach) |
| 5563 | continue; |
| 5564 | |
| 5565 | /* The architecture is found. */ |
| 5566 | res = _bfd_new_bfd_contained_in (abfd); |
| 5567 | if (res == NULL) |
| 5568 | return NULL; |
| 5569 | |
| 5570 | bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e); |
| 5571 | |
| 5572 | if (bfd_check_format (res, format)) |
| 5573 | { |
| 5574 | BFD_ASSERT (bfd_get_arch_info (res) == arch); |
| 5575 | return res; |
| 5576 | } |
| 5577 | bfd_close (res); |
| 5578 | return NULL; |
| 5579 | } |
| 5580 | |
| 5581 | return NULL; |
| 5582 | } |
| 5583 | |
| 5584 | static bfd_boolean |
| 5585 | bfd_mach_o_fat_close_and_cleanup (bfd *abfd) |
| 5586 | { |
| 5587 | _bfd_unlink_from_archive_parent (abfd); |
| 5588 | return TRUE; |
| 5589 | } |
| 5590 | |
| 5591 | int |
| 5592 | bfd_mach_o_lookup_command (bfd *abfd, |
| 5593 | bfd_mach_o_load_command_type type, |
| 5594 | bfd_mach_o_load_command **mcommand) |
| 5595 | { |
| 5596 | struct mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 5597 | struct bfd_mach_o_load_command *cmd; |
| 5598 | unsigned int num; |
| 5599 | |
| 5600 | BFD_ASSERT (mdata != NULL); |
| 5601 | BFD_ASSERT (mcommand != NULL); |
| 5602 | |
| 5603 | num = 0; |
| 5604 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 5605 | { |
| 5606 | if (cmd->type != type) |
| 5607 | continue; |
| 5608 | |
| 5609 | if (num == 0) |
| 5610 | *mcommand = cmd; |
| 5611 | num++; |
| 5612 | } |
| 5613 | |
| 5614 | return num; |
| 5615 | } |
| 5616 | |
| 5617 | unsigned long |
| 5618 | bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type type) |
| 5619 | { |
| 5620 | switch (type) |
| 5621 | { |
| 5622 | case BFD_MACH_O_CPU_TYPE_MC680x0: |
| 5623 | return 0x04000000; |
| 5624 | case BFD_MACH_O_CPU_TYPE_POWERPC: |
| 5625 | return 0xc0000000; |
| 5626 | case BFD_MACH_O_CPU_TYPE_I386: |
| 5627 | return 0xc0000000; |
| 5628 | case BFD_MACH_O_CPU_TYPE_SPARC: |
| 5629 | return 0xf0000000; |
| 5630 | case BFD_MACH_O_CPU_TYPE_HPPA: |
| 5631 | return 0xc0000000 - 0x04000000; |
| 5632 | default: |
| 5633 | return 0; |
| 5634 | } |
| 5635 | } |
| 5636 | |
| 5637 | /* The following two tables should be kept, as far as possible, in order of |
| 5638 | most frequently used entries to optimize their use from gas. */ |
| 5639 | |
| 5640 | const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] = |
| 5641 | { |
| 5642 | { "regular", BFD_MACH_O_S_REGULAR}, |
| 5643 | { "coalesced", BFD_MACH_O_S_COALESCED}, |
| 5644 | { "zerofill", BFD_MACH_O_S_ZEROFILL}, |
| 5645 | { "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS}, |
| 5646 | { "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS}, |
| 5647 | { "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS}, |
| 5648 | { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS}, |
| 5649 | { "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS}, |
| 5650 | { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS}, |
| 5651 | { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS}, |
| 5652 | { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL}, |
| 5653 | { "interposing", BFD_MACH_O_S_INTERPOSING}, |
| 5654 | { "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF}, |
| 5655 | { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS}, |
| 5656 | { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS}, |
| 5657 | { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS}, |
| 5658 | { "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS}, |
| 5659 | { NULL, 0} |
| 5660 | }; |
| 5661 | |
| 5662 | const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] = |
| 5663 | { |
| 5664 | { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS }, |
| 5665 | { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS }, |
| 5666 | { "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC }, |
| 5667 | { "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC }, |
| 5668 | { "debug", BFD_MACH_O_S_ATTR_DEBUG }, |
| 5669 | { "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT }, |
| 5670 | { "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP }, |
| 5671 | { "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS }, |
| 5672 | { "no_toc", BFD_MACH_O_S_ATTR_NO_TOC }, |
| 5673 | { "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, |
| 5674 | { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE }, |
| 5675 | { NULL, 0} |
| 5676 | }; |
| 5677 | |
| 5678 | /* Get the section type from NAME. Return 256 if NAME is unknown. */ |
| 5679 | |
| 5680 | unsigned int |
| 5681 | bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name) |
| 5682 | { |
| 5683 | const bfd_mach_o_xlat_name *x; |
| 5684 | bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); |
| 5685 | |
| 5686 | for (x = bfd_mach_o_section_type_name; x->name; x++) |
| 5687 | if (strcmp (x->name, name) == 0) |
| 5688 | { |
| 5689 | /* We found it... does the target support it? */ |
| 5690 | if (bed->bfd_mach_o_section_type_valid_for_target == NULL |
| 5691 | || bed->bfd_mach_o_section_type_valid_for_target (x->val)) |
| 5692 | return x->val; /* OK. */ |
| 5693 | else |
| 5694 | break; /* Not supported. */ |
| 5695 | } |
| 5696 | /* Maximum section ID = 0xff. */ |
| 5697 | return 256; |
| 5698 | } |
| 5699 | |
| 5700 | /* Get the section attribute from NAME. Return -1 if NAME is unknown. */ |
| 5701 | |
| 5702 | unsigned int |
| 5703 | bfd_mach_o_get_section_attribute_from_name (const char *name) |
| 5704 | { |
| 5705 | const bfd_mach_o_xlat_name *x; |
| 5706 | |
| 5707 | for (x = bfd_mach_o_section_attribute_name; x->name; x++) |
| 5708 | if (strcmp (x->name, name) == 0) |
| 5709 | return x->val; |
| 5710 | return (unsigned int)-1; |
| 5711 | } |
| 5712 | |
| 5713 | int |
| 5714 | bfd_mach_o_core_fetch_environment (bfd *abfd, |
| 5715 | unsigned char **rbuf, |
| 5716 | unsigned int *rlen) |
| 5717 | { |
| 5718 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 5719 | unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype); |
| 5720 | bfd_mach_o_load_command *cmd; |
| 5721 | |
| 5722 | for (cmd = mdata->first_command; cmd != NULL; cmd = cmd->next) |
| 5723 | { |
| 5724 | bfd_mach_o_segment_command *seg; |
| 5725 | |
| 5726 | if (cmd->type != BFD_MACH_O_LC_SEGMENT) |
| 5727 | continue; |
| 5728 | |
| 5729 | seg = &cmd->command.segment; |
| 5730 | |
| 5731 | if ((seg->vmaddr + seg->vmsize) == stackaddr) |
| 5732 | { |
| 5733 | unsigned long start = seg->fileoff; |
| 5734 | unsigned long end = seg->fileoff + seg->filesize; |
| 5735 | unsigned char *buf = bfd_malloc (1024); |
| 5736 | unsigned long size = 1024; |
| 5737 | |
| 5738 | for (;;) |
| 5739 | { |
| 5740 | bfd_size_type nread = 0; |
| 5741 | unsigned long offset; |
| 5742 | int found_nonnull = 0; |
| 5743 | |
| 5744 | if (size > (end - start)) |
| 5745 | size = (end - start); |
| 5746 | |
| 5747 | buf = bfd_realloc_or_free (buf, size); |
| 5748 | if (buf == NULL) |
| 5749 | return -1; |
| 5750 | |
| 5751 | if (bfd_seek (abfd, end - size, SEEK_SET) != 0) |
| 5752 | { |
| 5753 | free (buf); |
| 5754 | return -1; |
| 5755 | } |
| 5756 | |
| 5757 | nread = bfd_bread (buf, size, abfd); |
| 5758 | |
| 5759 | if (nread != size) |
| 5760 | { |
| 5761 | free (buf); |
| 5762 | return -1; |
| 5763 | } |
| 5764 | |
| 5765 | for (offset = 4; offset <= size; offset += 4) |
| 5766 | { |
| 5767 | unsigned long val; |
| 5768 | |
| 5769 | val = *((unsigned long *) (buf + size - offset)); |
| 5770 | if (! found_nonnull) |
| 5771 | { |
| 5772 | if (val != 0) |
| 5773 | found_nonnull = 1; |
| 5774 | } |
| 5775 | else if (val == 0x0) |
| 5776 | { |
| 5777 | unsigned long bottom; |
| 5778 | unsigned long top; |
| 5779 | |
| 5780 | bottom = seg->fileoff + seg->filesize - offset; |
| 5781 | top = seg->fileoff + seg->filesize - 4; |
| 5782 | *rbuf = bfd_malloc (top - bottom); |
| 5783 | *rlen = top - bottom; |
| 5784 | |
| 5785 | memcpy (*rbuf, buf + size - *rlen, *rlen); |
| 5786 | free (buf); |
| 5787 | return 0; |
| 5788 | } |
| 5789 | } |
| 5790 | |
| 5791 | if (size == (end - start)) |
| 5792 | break; |
| 5793 | |
| 5794 | size *= 2; |
| 5795 | } |
| 5796 | |
| 5797 | free (buf); |
| 5798 | } |
| 5799 | } |
| 5800 | |
| 5801 | return -1; |
| 5802 | } |
| 5803 | |
| 5804 | char * |
| 5805 | bfd_mach_o_core_file_failing_command (bfd *abfd) |
| 5806 | { |
| 5807 | unsigned char *buf = NULL; |
| 5808 | unsigned int len = 0; |
| 5809 | int ret; |
| 5810 | |
| 5811 | ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len); |
| 5812 | if (ret < 0) |
| 5813 | return NULL; |
| 5814 | |
| 5815 | return (char *) buf; |
| 5816 | } |
| 5817 | |
| 5818 | int |
| 5819 | bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) |
| 5820 | { |
| 5821 | return 0; |
| 5822 | } |
| 5823 | |
| 5824 | static bfd_mach_o_uuid_command * |
| 5825 | bfd_mach_o_lookup_uuid_command (bfd *abfd) |
| 5826 | { |
| 5827 | bfd_mach_o_load_command *uuid_cmd = NULL; |
| 5828 | int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd); |
| 5829 | if (ncmd != 1 || uuid_cmd == NULL) |
| 5830 | return FALSE; |
| 5831 | return &uuid_cmd->command.uuid; |
| 5832 | } |
| 5833 | |
| 5834 | /* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */ |
| 5835 | |
| 5836 | static bfd_boolean |
| 5837 | bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd) |
| 5838 | { |
| 5839 | bfd_mach_o_uuid_command *dsym_uuid_cmd; |
| 5840 | |
| 5841 | BFD_ASSERT (abfd); |
| 5842 | BFD_ASSERT (uuid_cmd); |
| 5843 | |
| 5844 | if (!bfd_check_format (abfd, bfd_object)) |
| 5845 | return FALSE; |
| 5846 | |
| 5847 | if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour |
| 5848 | || bfd_mach_o_get_data (abfd) == NULL |
| 5849 | || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM) |
| 5850 | return FALSE; |
| 5851 | |
| 5852 | dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); |
| 5853 | if (dsym_uuid_cmd == NULL) |
| 5854 | return FALSE; |
| 5855 | |
| 5856 | if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid, |
| 5857 | sizeof (uuid_cmd->uuid)) != 0) |
| 5858 | return FALSE; |
| 5859 | |
| 5860 | return TRUE; |
| 5861 | } |
| 5862 | |
| 5863 | /* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD. |
| 5864 | The caller is responsible for closing the returned BFD object and |
| 5865 | its my_archive if the returned BFD is in a fat dSYM. */ |
| 5866 | |
| 5867 | static bfd * |
| 5868 | bfd_mach_o_find_dsym (const char *dsym_filename, |
| 5869 | const bfd_mach_o_uuid_command *uuid_cmd, |
| 5870 | const bfd_arch_info_type *arch) |
| 5871 | { |
| 5872 | bfd *base_dsym_bfd, *dsym_bfd; |
| 5873 | |
| 5874 | BFD_ASSERT (uuid_cmd); |
| 5875 | |
| 5876 | base_dsym_bfd = bfd_openr (dsym_filename, NULL); |
| 5877 | if (base_dsym_bfd == NULL) |
| 5878 | return NULL; |
| 5879 | |
| 5880 | dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch); |
| 5881 | if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd)) |
| 5882 | return dsym_bfd; |
| 5883 | |
| 5884 | bfd_close (dsym_bfd); |
| 5885 | if (base_dsym_bfd != dsym_bfd) |
| 5886 | bfd_close (base_dsym_bfd); |
| 5887 | |
| 5888 | return NULL; |
| 5889 | } |
| 5890 | |
| 5891 | /* Return a BFD created from a dSYM file for ABFD. |
| 5892 | The caller is responsible for closing the returned BFD object, its |
| 5893 | filename, and its my_archive if the returned BFD is in a fat dSYM. */ |
| 5894 | |
| 5895 | static bfd * |
| 5896 | bfd_mach_o_follow_dsym (bfd *abfd) |
| 5897 | { |
| 5898 | char *dsym_filename; |
| 5899 | bfd_mach_o_uuid_command *uuid_cmd; |
| 5900 | bfd *dsym_bfd, *base_bfd = abfd; |
| 5901 | const char *base_basename; |
| 5902 | |
| 5903 | if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour) |
| 5904 | return NULL; |
| 5905 | |
| 5906 | if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive)) |
| 5907 | base_bfd = abfd->my_archive; |
| 5908 | /* BFD may have been opened from a stream. */ |
| 5909 | if (base_bfd->filename == NULL) |
| 5910 | { |
| 5911 | bfd_set_error (bfd_error_invalid_operation); |
| 5912 | return NULL; |
| 5913 | } |
| 5914 | base_basename = lbasename (base_bfd->filename); |
| 5915 | |
| 5916 | uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd); |
| 5917 | if (uuid_cmd == NULL) |
| 5918 | return NULL; |
| 5919 | |
| 5920 | /* TODO: We assume the DWARF file has the same as the binary's. |
| 5921 | It seems apple's GDB checks all files in the dSYM bundle directory. |
| 5922 | http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c |
| 5923 | */ |
| 5924 | dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename) |
| 5925 | + strlen (dsym_subdir) + 1 |
| 5926 | + strlen (base_basename) + 1); |
| 5927 | sprintf (dsym_filename, "%s%s/%s", |
| 5928 | base_bfd->filename, dsym_subdir, base_basename); |
| 5929 | |
| 5930 | dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd, |
| 5931 | bfd_get_arch_info (abfd)); |
| 5932 | if (dsym_bfd == NULL) |
| 5933 | free (dsym_filename); |
| 5934 | |
| 5935 | return dsym_bfd; |
| 5936 | } |
| 5937 | |
| 5938 | bfd_boolean |
| 5939 | bfd_mach_o_find_nearest_line (bfd *abfd, |
| 5940 | asymbol **symbols, |
| 5941 | asection *section, |
| 5942 | bfd_vma offset, |
| 5943 | const char **filename_ptr, |
| 5944 | const char **functionname_ptr, |
| 5945 | unsigned int *line_ptr, |
| 5946 | unsigned int *discriminator_ptr) |
| 5947 | { |
| 5948 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 5949 | if (mdata == NULL) |
| 5950 | return FALSE; |
| 5951 | switch (mdata->header.filetype) |
| 5952 | { |
| 5953 | case BFD_MACH_O_MH_OBJECT: |
| 5954 | break; |
| 5955 | case BFD_MACH_O_MH_EXECUTE: |
| 5956 | case BFD_MACH_O_MH_DYLIB: |
| 5957 | case BFD_MACH_O_MH_BUNDLE: |
| 5958 | case BFD_MACH_O_MH_KEXT_BUNDLE: |
| 5959 | if (mdata->dwarf2_find_line_info == NULL) |
| 5960 | { |
| 5961 | mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd); |
| 5962 | /* When we couldn't find dSYM for this binary, we look for |
| 5963 | the debug information in the binary itself. In this way, |
| 5964 | we won't try finding separated dSYM again because |
| 5965 | mdata->dwarf2_find_line_info will be filled. */ |
| 5966 | if (! mdata->dsym_bfd) |
| 5967 | break; |
| 5968 | if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd, |
| 5969 | dwarf_debug_sections, symbols, |
| 5970 | &mdata->dwarf2_find_line_info, |
| 5971 | FALSE)) |
| 5972 | return FALSE; |
| 5973 | } |
| 5974 | break; |
| 5975 | default: |
| 5976 | return FALSE; |
| 5977 | } |
| 5978 | return _bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| 5979 | filename_ptr, functionname_ptr, |
| 5980 | line_ptr, discriminator_ptr, |
| 5981 | dwarf_debug_sections, 0, |
| 5982 | &mdata->dwarf2_find_line_info); |
| 5983 | } |
| 5984 | |
| 5985 | bfd_boolean |
| 5986 | bfd_mach_o_close_and_cleanup (bfd *abfd) |
| 5987 | { |
| 5988 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 5989 | if (bfd_get_format (abfd) == bfd_object && mdata != NULL) |
| 5990 | { |
| 5991 | _bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info); |
| 5992 | bfd_mach_o_free_cached_info (abfd); |
| 5993 | if (mdata->dsym_bfd != NULL) |
| 5994 | { |
| 5995 | bfd *fat_bfd = mdata->dsym_bfd->my_archive; |
| 5996 | #if 0 |
| 5997 | /* FIXME: PR 19435: This calculation to find the memory allocated by |
| 5998 | bfd_mach_o_follow_dsym for the filename does not always end up |
| 5999 | selecting the correct pointer. Unfortunately this problem is |
| 6000 | very hard to reproduce on a non Mach-O native system, so until it |
| 6001 | can be traced and fixed on such a system, this code will remain |
| 6002 | commented out. This does mean that there will be a memory leak, |
| 6003 | but it is small, and happens when we are closing down, so it |
| 6004 | should not matter too much. */ |
| 6005 | char *dsym_filename = (char *)(fat_bfd |
| 6006 | ? fat_bfd->filename |
| 6007 | : mdata->dsym_bfd->filename); |
| 6008 | #endif |
| 6009 | bfd_close (mdata->dsym_bfd); |
| 6010 | mdata->dsym_bfd = NULL; |
| 6011 | if (fat_bfd) |
| 6012 | bfd_close (fat_bfd); |
| 6013 | #if 0 |
| 6014 | free (dsym_filename); |
| 6015 | #endif |
| 6016 | } |
| 6017 | } |
| 6018 | |
| 6019 | return _bfd_generic_close_and_cleanup (abfd); |
| 6020 | } |
| 6021 | |
| 6022 | bfd_boolean |
| 6023 | bfd_mach_o_free_cached_info (bfd *abfd) |
| 6024 | { |
| 6025 | bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); |
| 6026 | asection *asect; |
| 6027 | free (mdata->dyn_reloc_cache); |
| 6028 | mdata->dyn_reloc_cache = NULL; |
| 6029 | for (asect = abfd->sections; asect != NULL; asect = asect->next) |
| 6030 | { |
| 6031 | free (asect->relocation); |
| 6032 | asect->relocation = NULL; |
| 6033 | } |
| 6034 | |
| 6035 | return TRUE; |
| 6036 | } |
| 6037 | |
| 6038 | #define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup |
| 6039 | #define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup |
| 6040 | |
| 6041 | #define bfd_mach_o_canonicalize_one_reloc NULL |
| 6042 | #define bfd_mach_o_swap_reloc_out NULL |
| 6043 | #define bfd_mach_o_print_thread NULL |
| 6044 | #define bfd_mach_o_tgt_seg_table NULL |
| 6045 | #define bfd_mach_o_section_type_valid_for_tgt NULL |
| 6046 | |
| 6047 | #define TARGET_NAME mach_o_be_vec |
| 6048 | #define TARGET_STRING "mach-o-be" |
| 6049 | #define TARGET_ARCHITECTURE bfd_arch_unknown |
| 6050 | #define TARGET_PAGESIZE 1 |
| 6051 | #define TARGET_BIG_ENDIAN 1 |
| 6052 | #define TARGET_ARCHIVE 0 |
| 6053 | #define TARGET_PRIORITY 1 |
| 6054 | #include "mach-o-target.c" |
| 6055 | |
| 6056 | #undef TARGET_NAME |
| 6057 | #undef TARGET_STRING |
| 6058 | #undef TARGET_ARCHITECTURE |
| 6059 | #undef TARGET_PAGESIZE |
| 6060 | #undef TARGET_BIG_ENDIAN |
| 6061 | #undef TARGET_ARCHIVE |
| 6062 | #undef TARGET_PRIORITY |
| 6063 | |
| 6064 | #define TARGET_NAME mach_o_le_vec |
| 6065 | #define TARGET_STRING "mach-o-le" |
| 6066 | #define TARGET_ARCHITECTURE bfd_arch_unknown |
| 6067 | #define TARGET_PAGESIZE 1 |
| 6068 | #define TARGET_BIG_ENDIAN 0 |
| 6069 | #define TARGET_ARCHIVE 0 |
| 6070 | #define TARGET_PRIORITY 1 |
| 6071 | |
| 6072 | #include "mach-o-target.c" |
| 6073 | |
| 6074 | #undef TARGET_NAME |
| 6075 | #undef TARGET_STRING |
| 6076 | #undef TARGET_ARCHITECTURE |
| 6077 | #undef TARGET_PAGESIZE |
| 6078 | #undef TARGET_BIG_ENDIAN |
| 6079 | #undef TARGET_ARCHIVE |
| 6080 | #undef TARGET_PRIORITY |
| 6081 | |
| 6082 | /* Not yet handled: creating an archive. */ |
| 6083 | #define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive |
| 6084 | |
| 6085 | #define bfd_mach_o_close_and_cleanup bfd_mach_o_fat_close_and_cleanup |
| 6086 | |
| 6087 | /* Not used. */ |
| 6088 | #define bfd_mach_o_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt |
| 6089 | #define bfd_mach_o_openr_next_archived_file bfd_mach_o_fat_openr_next_archived_file |
| 6090 | #define bfd_mach_o_archive_p bfd_mach_o_fat_archive_p |
| 6091 | |
| 6092 | #define TARGET_NAME mach_o_fat_vec |
| 6093 | #define TARGET_STRING "mach-o-fat" |
| 6094 | #define TARGET_ARCHITECTURE bfd_arch_unknown |
| 6095 | #define TARGET_PAGESIZE 1 |
| 6096 | #define TARGET_BIG_ENDIAN 1 |
| 6097 | #define TARGET_ARCHIVE 1 |
| 6098 | #define TARGET_PRIORITY 0 |
| 6099 | |
| 6100 | #include "mach-o-target.c" |
| 6101 | |
| 6102 | #undef TARGET_NAME |
| 6103 | #undef TARGET_STRING |
| 6104 | #undef TARGET_ARCHITECTURE |
| 6105 | #undef TARGET_PAGESIZE |
| 6106 | #undef TARGET_BIG_ENDIAN |
| 6107 | #undef TARGET_ARCHIVE |
| 6108 | #undef TARGET_PRIORITY |