| 1 | /* Mach-O support for BFD. |
| 2 | Copyright (C) 2011-2020 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 | #ifndef _MACH_O_EXTERNAL_H |
| 22 | #define _MACH_O_EXTERNAL_H |
| 23 | |
| 24 | struct mach_o_header_external |
| 25 | { |
| 26 | unsigned char magic[4]; /* Magic number. */ |
| 27 | unsigned char cputype[4]; /* CPU that this object is for. */ |
| 28 | unsigned char cpusubtype[4]; /* CPU subtype. */ |
| 29 | unsigned char filetype[4]; /* Type of file. */ |
| 30 | unsigned char ncmds[4]; /* Number of load commands. */ |
| 31 | unsigned char sizeofcmds[4]; /* Total size of load commands. */ |
| 32 | unsigned char flags[4]; /* Flags. */ |
| 33 | unsigned char reserved[4]; /* Reserved (on 64-bit version only). */ |
| 34 | }; |
| 35 | |
| 36 | #define BFD_MACH_O_HEADER_SIZE 28 |
| 37 | #define BFD_MACH_O_HEADER_64_SIZE 32 |
| 38 | |
| 39 | /* 32-bit section header. */ |
| 40 | |
| 41 | struct mach_o_section_32_external |
| 42 | { |
| 43 | unsigned char sectname[16]; /* Section name. */ |
| 44 | unsigned char segname[16]; /* Segment that the section belongs to. */ |
| 45 | unsigned char addr[4]; /* Address of this section in memory. */ |
| 46 | unsigned char size[4]; /* Size in bytes of this section. */ |
| 47 | unsigned char offset[4]; /* File offset of this section. */ |
| 48 | unsigned char align[4]; /* log2 of this section's alignment. */ |
| 49 | unsigned char reloff[4]; /* File offset of this section's relocs. */ |
| 50 | unsigned char nreloc[4]; /* Number of relocs for this section. */ |
| 51 | unsigned char flags[4]; /* Section flags/attributes. */ |
| 52 | unsigned char reserved1[4]; |
| 53 | unsigned char reserved2[4]; |
| 54 | }; |
| 55 | #define BFD_MACH_O_SECTION_SIZE 68 |
| 56 | |
| 57 | /* 64-bit section header. */ |
| 58 | |
| 59 | struct mach_o_section_64_external |
| 60 | { |
| 61 | unsigned char sectname[16]; /* Section name. */ |
| 62 | unsigned char segname[16]; /* Segment that the section belongs to. */ |
| 63 | unsigned char addr[8]; /* Address of this section in memory. */ |
| 64 | unsigned char size[8]; /* Size in bytes of this section. */ |
| 65 | unsigned char offset[4]; /* File offset of this section. */ |
| 66 | unsigned char align[4]; /* log2 of this section's alignment. */ |
| 67 | unsigned char reloff[4]; /* File offset of this section's relocs. */ |
| 68 | unsigned char nreloc[4]; /* Number of relocs for this section. */ |
| 69 | unsigned char flags[4]; /* Section flags/attributes. */ |
| 70 | unsigned char reserved1[4]; |
| 71 | unsigned char reserved2[4]; |
| 72 | unsigned char reserved3[4]; |
| 73 | }; |
| 74 | #define BFD_MACH_O_SECTION_64_SIZE 80 |
| 75 | |
| 76 | struct mach_o_load_command_external |
| 77 | { |
| 78 | unsigned char cmd[4]; /* The type of load command. */ |
| 79 | unsigned char cmdsize[4]; /* Size in bytes of entire command. */ |
| 80 | }; |
| 81 | #define BFD_MACH_O_LC_SIZE 8 |
| 82 | |
| 83 | struct mach_o_segment_command_32_external |
| 84 | { |
| 85 | unsigned char segname[16]; /* Name of this segment. */ |
| 86 | unsigned char vmaddr[4]; /* Virtual memory address of this segment. */ |
| 87 | unsigned char vmsize[4]; /* Size there, in bytes. */ |
| 88 | unsigned char fileoff[4]; /* Offset in bytes of the data to be mapped. */ |
| 89 | unsigned char filesize[4]; /* Size in bytes on disk. */ |
| 90 | unsigned char maxprot[4]; /* Maximum permitted vm protection. */ |
| 91 | unsigned char initprot[4]; /* Initial vm protection. */ |
| 92 | unsigned char nsects[4]; /* Number of sections in this segment. */ |
| 93 | unsigned char flags[4]; /* Flags that affect the loading. */ |
| 94 | }; |
| 95 | #define BFD_MACH_O_LC_SEGMENT_SIZE 56 /* Include the header. */ |
| 96 | |
| 97 | struct mach_o_segment_command_64_external |
| 98 | { |
| 99 | unsigned char segname[16]; /* Name of this segment. */ |
| 100 | unsigned char vmaddr[8]; /* Virtual memory address of this segment. */ |
| 101 | unsigned char vmsize[8]; /* Size there, in bytes. */ |
| 102 | unsigned char fileoff[8]; /* Offset in bytes of the data to be mapped. */ |
| 103 | unsigned char filesize[8]; /* Size in bytes on disk. */ |
| 104 | unsigned char maxprot[4]; /* Maximum permitted vm protection. */ |
| 105 | unsigned char initprot[4]; /* Initial vm protection. */ |
| 106 | unsigned char nsects[4]; /* Number of sections in this segment. */ |
| 107 | unsigned char flags[4]; /* Flags that affect the loading. */ |
| 108 | }; |
| 109 | #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72 /* Include the header. */ |
| 110 | |
| 111 | struct mach_o_reloc_info_external |
| 112 | { |
| 113 | unsigned char r_address[4]; |
| 114 | unsigned char r_symbolnum[4]; |
| 115 | }; |
| 116 | #define BFD_MACH_O_RELENT_SIZE 8 |
| 117 | |
| 118 | /* Relocations are based on 'address' being a section offset and an assumption |
| 119 | that sections are never more than 2^24-1 bytes in size. Relocation data |
| 120 | also carry information on type/size/PC-relative/extern and whether scattered |
| 121 | or not [stored in the MSB of the r_address]. */ |
| 122 | |
| 123 | #define BFD_MACH_O_SR_SCATTERED 0x80000000 |
| 124 | |
| 125 | /* For a non-scattered reloc, the relocation info is found in r_symbolnum. |
| 126 | Bytes 1 to 3 contain the symbol number (0xffffff, in a non-scattered PAIR). |
| 127 | Byte 4 contains the relocation info - but with differing bit-positions |
| 128 | dependent on target endian-ness - as below. */ |
| 129 | |
| 130 | #define BFD_MACH_O_LE_PCREL 0x01 |
| 131 | #define BFD_MACH_O_LE_LENGTH_SHIFT 1 |
| 132 | #define BFD_MACH_O_LE_EXTERN 0x08 |
| 133 | #define BFD_MACH_O_LE_TYPE_SHIFT 4 |
| 134 | |
| 135 | #define BFD_MACH_O_BE_PCREL 0x80 |
| 136 | #define BFD_MACH_O_BE_LENGTH_SHIFT 5 |
| 137 | #define BFD_MACH_O_BE_EXTERN 0x10 |
| 138 | #define BFD_MACH_O_BE_TYPE_SHIFT 0 |
| 139 | |
| 140 | /* The field sizes are the same for both BE and LE. */ |
| 141 | #define BFD_MACH_O_LENGTH_MASK 0x03 |
| 142 | #define BFD_MACH_O_TYPE_MASK 0x0f |
| 143 | |
| 144 | /* For a scattered reloc entry the info is contained in r_address. There |
| 145 | is no need to discriminate on target endian-ness, since the design was |
| 146 | arranged to produce the same layout on both. Scattered relocations are |
| 147 | only used for local items, therefore there is no 'extern' field. */ |
| 148 | |
| 149 | #define BFD_MACH_O_SR_PCREL 0x40000000 |
| 150 | #define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3) |
| 151 | #define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f) |
| 152 | #define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff) |
| 153 | #define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28) |
| 154 | #define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24) |
| 155 | #define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff) |
| 156 | |
| 157 | struct mach_o_symtab_command_external |
| 158 | { |
| 159 | unsigned char symoff[4]; /* File offset of the symbol table. */ |
| 160 | unsigned char nsyms[4]; /* Number of symbols. */ |
| 161 | unsigned char stroff[4]; /* File offset of the string table. */ |
| 162 | unsigned char strsize[4]; /* String table size. */ |
| 163 | }; |
| 164 | |
| 165 | struct mach_o_nlist_external |
| 166 | { |
| 167 | unsigned char n_strx[4]; |
| 168 | unsigned char n_type[1]; |
| 169 | unsigned char n_sect[1]; |
| 170 | unsigned char n_desc[2]; |
| 171 | unsigned char n_value[4]; |
| 172 | }; |
| 173 | #define BFD_MACH_O_NLIST_SIZE 12 |
| 174 | |
| 175 | struct mach_o_nlist_64_external |
| 176 | { |
| 177 | unsigned char n_strx[4]; |
| 178 | unsigned char n_type[1]; |
| 179 | unsigned char n_sect[1]; |
| 180 | unsigned char n_desc[2]; |
| 181 | unsigned char n_value[8]; |
| 182 | }; |
| 183 | #define BFD_MACH_O_NLIST_64_SIZE 16 |
| 184 | |
| 185 | struct mach_o_thread_command_external |
| 186 | { |
| 187 | unsigned char flavour[4]; |
| 188 | unsigned char count[4]; |
| 189 | }; |
| 190 | |
| 191 | /* For commands that just have a string or a path. */ |
| 192 | struct mach_o_str_command_external |
| 193 | { |
| 194 | unsigned char str[4]; |
| 195 | }; |
| 196 | |
| 197 | struct mach_o_dylib_command_external |
| 198 | { |
| 199 | unsigned char name[4]; |
| 200 | unsigned char timestamp[4]; |
| 201 | unsigned char current_version[4]; |
| 202 | unsigned char compatibility_version[4]; |
| 203 | }; |
| 204 | |
| 205 | struct mach_o_dysymtab_command_external |
| 206 | { |
| 207 | unsigned char ilocalsym[4]; /* Index of. */ |
| 208 | unsigned char nlocalsym[4]; /* Number of. */ |
| 209 | unsigned char iextdefsym[4]; |
| 210 | unsigned char nextdefsym[4]; |
| 211 | unsigned char iundefsym[4]; |
| 212 | unsigned char nundefsym[4]; |
| 213 | unsigned char tocoff[4]; |
| 214 | unsigned char ntoc[4]; |
| 215 | unsigned char modtaboff[4]; |
| 216 | unsigned char nmodtab[4]; |
| 217 | unsigned char extrefsymoff[4]; |
| 218 | unsigned char nextrefsyms[4]; |
| 219 | unsigned char indirectsymoff[4]; |
| 220 | unsigned char nindirectsyms[4]; |
| 221 | unsigned char extreloff[4]; |
| 222 | unsigned char nextrel[4]; |
| 223 | unsigned char locreloff[4]; |
| 224 | unsigned char nlocrel[4]; |
| 225 | }; |
| 226 | |
| 227 | struct mach_o_dylib_module_external |
| 228 | { |
| 229 | unsigned char module_name[4]; |
| 230 | unsigned char iextdefsym[4]; |
| 231 | unsigned char nextdefsym[4]; |
| 232 | unsigned char irefsym[4]; |
| 233 | unsigned char nrefsym[4]; |
| 234 | unsigned char ilocalsym[4]; |
| 235 | unsigned char nlocalsym[4]; |
| 236 | unsigned char iextrel[4]; |
| 237 | unsigned char nextrel[4]; |
| 238 | unsigned char iinit_iterm[4]; |
| 239 | unsigned char ninit_nterm[4]; |
| 240 | unsigned char objc_module_info_addr[4]; |
| 241 | unsigned char objc_module_info_size[4]; |
| 242 | }; |
| 243 | #define BFD_MACH_O_DYLIB_MODULE_SIZE 52 |
| 244 | |
| 245 | struct mach_o_dylib_module_64_external |
| 246 | { |
| 247 | unsigned char module_name[4]; |
| 248 | unsigned char iextdefsym[4]; |
| 249 | unsigned char nextdefsym[4]; |
| 250 | unsigned char irefsym[4]; |
| 251 | unsigned char nrefsym[4]; |
| 252 | unsigned char ilocalsym[4]; |
| 253 | unsigned char nlocalsym[4]; |
| 254 | unsigned char iextrel[4]; |
| 255 | unsigned char nextrel[4]; |
| 256 | unsigned char iinit_iterm[4]; |
| 257 | unsigned char ninit_nterm[4]; |
| 258 | unsigned char objc_module_info_size[4]; |
| 259 | unsigned char objc_module_info_addr[8]; |
| 260 | }; |
| 261 | #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56 |
| 262 | |
| 263 | struct mach_o_dylib_table_of_contents_external |
| 264 | { |
| 265 | unsigned char symbol_index[4]; |
| 266 | unsigned char module_index[4]; |
| 267 | }; |
| 268 | #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8 |
| 269 | |
| 270 | struct mach_o_linkedit_data_command_external |
| 271 | { |
| 272 | unsigned char dataoff[4]; |
| 273 | unsigned char datasize[4]; |
| 274 | }; |
| 275 | |
| 276 | struct mach_o_dyld_info_command_external |
| 277 | { |
| 278 | unsigned char rebase_off[4]; |
| 279 | unsigned char rebase_size[4]; |
| 280 | unsigned char bind_off[4]; |
| 281 | unsigned char bind_size[4]; |
| 282 | unsigned char weak_bind_off[4]; |
| 283 | unsigned char weak_bind_size[4]; |
| 284 | unsigned char lazy_bind_off[4]; |
| 285 | unsigned char lazy_bind_size[4]; |
| 286 | unsigned char export_off[4]; |
| 287 | unsigned char export_size[4]; |
| 288 | }; |
| 289 | |
| 290 | struct mach_o_prebound_dylib_command_external |
| 291 | { |
| 292 | unsigned char name[4]; |
| 293 | unsigned char nmodules[4]; |
| 294 | unsigned char linked_modules[4]; |
| 295 | }; |
| 296 | |
| 297 | struct mach_o_prebind_cksum_command_external |
| 298 | { |
| 299 | unsigned char cksum[4]; |
| 300 | }; |
| 301 | |
| 302 | struct mach_o_twolevel_hints_command_external |
| 303 | { |
| 304 | unsigned char offset[4]; |
| 305 | unsigned char nhints[4]; |
| 306 | }; |
| 307 | |
| 308 | struct mach_o_version_min_command_external |
| 309 | { |
| 310 | unsigned char version[4]; |
| 311 | unsigned char sdk[4]; |
| 312 | }; |
| 313 | |
| 314 | struct mach_o_encryption_info_command_external |
| 315 | { |
| 316 | unsigned char cryptoff[4]; /* File offset of the encrypted area. */ |
| 317 | unsigned char cryptsize[4]; /* Size of the encrypted area. */ |
| 318 | unsigned char cryptid[4]; /* Encryption method. */ |
| 319 | }; |
| 320 | |
| 321 | struct mach_o_encryption_info_64_command_external |
| 322 | { |
| 323 | unsigned char cryptoff[4]; /* File offset of the encrypted area. */ |
| 324 | unsigned char cryptsize[4]; /* Size of the encrypted area. */ |
| 325 | unsigned char cryptid[4]; /* Encryption method. */ |
| 326 | unsigned char pad[4]; /* Pad to make struct size a multiple of 8. */ |
| 327 | }; |
| 328 | |
| 329 | struct mach_o_fvmlib_command_external |
| 330 | { |
| 331 | unsigned char name[4]; /* Offset of the name. */ |
| 332 | unsigned char minor_version[4]; |
| 333 | unsigned char header_addr[4]; |
| 334 | }; |
| 335 | |
| 336 | struct mach_o_entry_point_command_external |
| 337 | { |
| 338 | unsigned char entryoff[8]; /* File offset of the entry point. */ |
| 339 | unsigned char stacksize[8]; /* Initial stack size, if no null. */ |
| 340 | }; |
| 341 | |
| 342 | struct mach_o_source_version_command_external |
| 343 | { |
| 344 | unsigned char version[8]; /* Version A.B.C.D.E, with 10 bits for B-E, |
| 345 | and 24 bits for A. */ |
| 346 | }; |
| 347 | |
| 348 | struct mach_o_note_command_external |
| 349 | { |
| 350 | unsigned char data_owner[16]; /* Owner name for this note. */ |
| 351 | unsigned char offset[8]; /* File offset of the note. */ |
| 352 | unsigned char size[8]; /* Length of the note. */ |
| 353 | }; |
| 354 | |
| 355 | struct mach_o_build_version_command_external |
| 356 | { |
| 357 | unsigned char platform[4]; /* Target platform. */ |
| 358 | unsigned char minos[4]; /* X.Y.Z is encoded in nibbles xxxx.yy.zz. */ |
| 359 | unsigned char sdk[4]; /* X.Y.Z is encoded in nibbles xxxx.yy.zz. */ |
| 360 | unsigned char ntools[4]; /* Number of tool entries following this. */ |
| 361 | }; |
| 362 | |
| 363 | /* The LD_DATA_IN_CODE command use a linkedit_data_command that points to |
| 364 | a table of entries. */ |
| 365 | |
| 366 | struct mach_o_data_in_code_entry_external |
| 367 | { |
| 368 | unsigned char offset[4]; /* Offset from the mach_header. */ |
| 369 | unsigned char length[2]; /* Number of bytes. */ |
| 370 | unsigned char kind[2]; /* Kind. See BFD_MACH_O_DICE_ values. */ |
| 371 | }; |
| 372 | |
| 373 | struct mach_o_linker_option_command_external |
| 374 | { |
| 375 | unsigned char count[4]; /* Number of strings. */ |
| 376 | /* COUNT null terminated UTF-8 strings, with 0 at the end for padding. */ |
| 377 | }; |
| 378 | |
| 379 | struct mach_o_fat_header_external |
| 380 | { |
| 381 | unsigned char magic[4]; |
| 382 | unsigned char nfat_arch[4]; /* Number of components. */ |
| 383 | }; |
| 384 | |
| 385 | struct mach_o_fat_arch_external |
| 386 | { |
| 387 | unsigned char cputype[4]; |
| 388 | unsigned char cpusubtype[4]; |
| 389 | unsigned char offset[4]; /* File offset of the member. */ |
| 390 | unsigned char size[4]; /* Size of the member. */ |
| 391 | unsigned char align[4]; /* Power of 2. */ |
| 392 | }; |
| 393 | |
| 394 | struct mach_o_dyld_cache_header_external |
| 395 | { |
| 396 | unsigned char magic[16]; |
| 397 | |
| 398 | unsigned char mapping_offset[4]; |
| 399 | unsigned char mapping_count[4]; |
| 400 | unsigned char images_offset[4]; |
| 401 | unsigned char images_count[4]; |
| 402 | |
| 403 | unsigned char dyld_base_address[8]; |
| 404 | |
| 405 | unsigned char code_signature_offset[8]; |
| 406 | unsigned char code_signature_size[8]; |
| 407 | |
| 408 | unsigned char slide_info_offset[8]; |
| 409 | unsigned char slide_info_size[8]; |
| 410 | |
| 411 | unsigned char local_symbols_offset[8]; |
| 412 | unsigned char local_symbols_size[8]; |
| 413 | }; |
| 414 | |
| 415 | struct mach_o_dyld_cache_mapping_info_external |
| 416 | { |
| 417 | unsigned char address[8]; |
| 418 | unsigned char size[8]; |
| 419 | unsigned char file_offset[8]; |
| 420 | unsigned char max_prot[4]; |
| 421 | unsigned char init_prot[4]; |
| 422 | }; |
| 423 | |
| 424 | struct mach_o_dyld_cache_image_info_external |
| 425 | { |
| 426 | unsigned char address[8]; |
| 427 | unsigned char mtime[8]; |
| 428 | unsigned char inode[8]; |
| 429 | unsigned char path_file_offset[4]; |
| 430 | unsigned char pad[4]; |
| 431 | }; |
| 432 | |
| 433 | |
| 434 | #endif /* _MACH_O_EXTERNAL_H */ |