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46d1c23b | 1 | /* Mach-O support for BFD. |
219d1afa | 2 | Copyright (C) 2011-2018 Free Software Foundation, Inc. |
46d1c23b TG |
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 | ||
19765f52 IS |
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. | |
91cb7781 | 126 | Bytes 1 to 3 contain the symbol number (0xffffff, in a non-scattered PAIR). |
19765f52 IS |
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 | ||
46d1c23b TG |
157 | struct mach_o_symtab_command_external |
158 | { | |
fc55a902 TG |
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. */ | |
46d1c23b TG |
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 | ||
7a79c514 TG |
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 | ||
edbdea0e TG |
308 | struct mach_o_version_min_command_external |
309 | { | |
310 | unsigned char version[4]; | |
fc7b364a | 311 | unsigned char sdk[4]; |
edbdea0e TG |
312 | }; |
313 | ||
fc55a902 TG |
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 | ||
c25b1ab6 TG |
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 | ||
9f4a5bd1 TG |
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 | ||
91cb7781 TG |
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 | ||
fc7b364a RB |
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 | ||
91cb7781 TG |
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 | { | |
fc7b364a | 368 | unsigned char offset[4]; /* Offset from the mach_header. */ |
91cb7781 TG |
369 | unsigned char length[2]; /* Number of bytes. */ |
370 | unsigned char kind[2]; /* Kind. See BFD_MACH_O_DICE_ values. */ | |
371 | }; | |
372 | ||
c25b1ab6 TG |
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 | ||
46d1c23b TG |
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 | ||
c25b1ab6 TG |
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 | ||
46d1c23b | 434 | #endif /* _MACH_O_EXTERNAL_H */ |