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[deliverable/binutils-gdb.git] / include / mach-o / external.h
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46d1c23b 1/* Mach-O support for BFD.
4b95cf5c 2 Copyright (C) 2011-2014 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
24struct 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
41struct 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
59struct 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
76struct 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
83struct 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
97struct 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
111struct 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
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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).
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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
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157struct mach_o_symtab_command_external
158{
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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. */
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TG
163};
164
165struct 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
175struct 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
185struct 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. */
192struct mach_o_str_command_external
193{
194 unsigned char str[4];
195};
196
197struct 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
205struct 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
227struct 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
245struct 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
263struct 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
270struct mach_o_linkedit_data_command_external
271{
272 unsigned char dataoff[4];
273 unsigned char datasize[4];
274};
275
276struct 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
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290struct mach_o_version_min_command_external
291{
292 unsigned char version[4];
293 unsigned char reserved[4];
294};
295
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296struct mach_o_encryption_info_command_external
297{
298 unsigned char cryptoff[4]; /* File offset of the encrypted area. */
299 unsigned char cryptsize[4]; /* Size of the encrypted area. */
300 unsigned char cryptid[4]; /* Encryption method. */
301};
302
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303struct mach_o_fvmlib_command_external
304{
305 unsigned char name[4]; /* Offset of the name. */
306 unsigned char minor_version[4];
307 unsigned char header_addr[4];
308};
309
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TG
310struct mach_o_entry_point_command_external
311{
312 unsigned char entryoff[8]; /* File offset of the entry point. */
313 unsigned char stacksize[8]; /* Initial stack size, if no null. */
314};
315
316struct mach_o_source_version_command_external
317{
318 unsigned char version[8]; /* Version A.B.C.D.E, with 10 bits for B-E,
319 and 24 bits for A. */
320};
321
322/* The LD_DATA_IN_CODE command use a linkedit_data_command that points to
323 a table of entries. */
324
325struct mach_o_data_in_code_entry_external
326{
327 unsigned char offset[4]; /* Offset from the mach_header. */
328 unsigned char length[2]; /* Number of bytes. */
329 unsigned char kind[2]; /* Kind. See BFD_MACH_O_DICE_ values. */
330};
331
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TG
332struct mach_o_fat_header_external
333{
334 unsigned char magic[4];
335 unsigned char nfat_arch[4]; /* Number of components. */
336};
337
338struct mach_o_fat_arch_external
339{
340 unsigned char cputype[4];
341 unsigned char cpusubtype[4];
342 unsigned char offset[4]; /* File offset of the member. */
343 unsigned char size[4]; /* Size of the member. */
344 unsigned char align[4]; /* Power of 2. */
345};
346
347#endif /* _MACH_O_EXTERNAL_H */
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