source: trunk/libs/newlib/src/include/mach-o/external.h @ 444

Last change on this file since 444 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
File size: 11.3 KB
Line 
1/* Mach-O support for BFD.
2   Copyright 2011, 2012
3   Free Software Foundation, Inc.
4
5   This file is part of BFD, the Binary File Descriptor library.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20   MA 02110-1301, USA.  */
21
22#ifndef _MACH_O_EXTERNAL_H
23#define _MACH_O_EXTERNAL_H
24
25struct mach_o_header_external
26{
27  unsigned char magic[4];       /* Magic number.  */
28  unsigned char cputype[4];     /* CPU that this object is for.  */
29  unsigned char cpusubtype[4];  /* CPU subtype.  */
30  unsigned char filetype[4];    /* Type of file.  */
31  unsigned char ncmds[4];       /* Number of load commands.  */
32  unsigned char sizeofcmds[4];  /* Total size of load commands.  */
33  unsigned char flags[4];       /* Flags.  */
34  unsigned char reserved[4];    /* Reserved (on 64-bit version only).  */
35};
36
37#define BFD_MACH_O_HEADER_SIZE 28
38#define BFD_MACH_O_HEADER_64_SIZE 32
39
40/* 32-bit section header.  */
41
42struct mach_o_section_32_external
43{
44  unsigned char sectname[16];   /* Section name.  */
45  unsigned char segname[16];    /* Segment that the section belongs to.  */
46  unsigned char addr[4];        /* Address of this section in memory.  */
47  unsigned char size[4];        /* Size in bytes of this section.  */
48  unsigned char offset[4];      /* File offset of this section.  */
49  unsigned char align[4];       /* log2 of this section's alignment.  */
50  unsigned char reloff[4];      /* File offset of this section's relocs.  */
51  unsigned char nreloc[4];      /* Number of relocs for this section.  */
52  unsigned char flags[4];       /* Section flags/attributes.  */
53  unsigned char reserved1[4];
54  unsigned char reserved2[4];
55};
56#define BFD_MACH_O_SECTION_SIZE 68
57
58/* 64-bit section header.  */
59
60struct mach_o_section_64_external
61{
62  unsigned char sectname[16];   /* Section name.  */
63  unsigned char segname[16];    /* Segment that the section belongs to.  */
64  unsigned char addr[8];        /* Address of this section in memory.  */
65  unsigned char size[8];        /* Size in bytes of this section.  */
66  unsigned char offset[4];      /* File offset of this section.  */
67  unsigned char align[4];       /* log2 of this section's alignment.  */
68  unsigned char reloff[4];      /* File offset of this section's relocs.  */
69  unsigned char nreloc[4];      /* Number of relocs for this section.  */
70  unsigned char flags[4];       /* Section flags/attributes.  */
71  unsigned char reserved1[4];
72  unsigned char reserved2[4];
73  unsigned char reserved3[4];
74};
75#define BFD_MACH_O_SECTION_64_SIZE 80
76
77struct mach_o_load_command_external
78{
79  unsigned char cmd[4];         /* The type of load command.  */
80  unsigned char cmdsize[4];     /* Size in bytes of entire command.  */
81};
82#define BFD_MACH_O_LC_SIZE 8
83
84struct mach_o_segment_command_32_external
85{
86  unsigned char segname[16];    /* Name of this segment.  */
87  unsigned char vmaddr[4];      /* Virtual memory address of this segment.  */
88  unsigned char vmsize[4];      /* Size there, in bytes.  */
89  unsigned char fileoff[4];     /* Offset in bytes of the data to be mapped.  */
90  unsigned char filesize[4];    /* Size in bytes on disk.  */
91  unsigned char maxprot[4];     /* Maximum permitted vm protection.  */
92  unsigned char initprot[4];    /* Initial vm protection.  */
93  unsigned char nsects[4];      /* Number of sections in this segment.  */
94  unsigned char flags[4];       /* Flags that affect the loading.  */
95};
96#define BFD_MACH_O_LC_SEGMENT_SIZE 56 /* Include the header.  */
97
98struct mach_o_segment_command_64_external
99{
100  unsigned char segname[16];    /* Name of this segment.  */
101  unsigned char vmaddr[8];      /* Virtual memory address of this segment.  */
102  unsigned char vmsize[8];      /* Size there, in bytes.  */
103  unsigned char fileoff[8];     /* Offset in bytes of the data to be mapped.  */
104  unsigned char filesize[8];    /* Size in bytes on disk.  */
105  unsigned char maxprot[4];     /* Maximum permitted vm protection.  */
106  unsigned char initprot[4];    /* Initial vm protection.  */
107  unsigned char nsects[4];      /* Number of sections in this segment.  */
108  unsigned char flags[4];       /* Flags that affect the loading.  */
109};
110#define BFD_MACH_O_LC_SEGMENT_64_SIZE 72 /* Include the header.  */
111
112struct mach_o_reloc_info_external
113{
114  unsigned char r_address[4];
115  unsigned char r_symbolnum[4];
116};
117#define BFD_MACH_O_RELENT_SIZE 8
118
119/* Relocations are based on 'address' being a section offset and an assumption
120   that sections are never more than 2^24-1 bytes in size.  Relocation data
121   also carry information on type/size/PC-relative/extern and whether scattered
122   or not [stored in the MSB of the r_address].  */
123
124#define BFD_MACH_O_SR_SCATTERED         0x80000000
125
126/* For a non-scattered reloc, the relocation info is found in r_symbolnum.
127   Bytes 1 to 3 contain the symbol number (0xffffff, in a non-scattered PAIR).
128   Byte 4 contains the relocation info - but with differing bit-positions
129   dependent on target endian-ness - as below.  */
130
131#define BFD_MACH_O_LE_PCREL             0x01
132#define BFD_MACH_O_LE_LENGTH_SHIFT      1
133#define BFD_MACH_O_LE_EXTERN            0x08
134#define BFD_MACH_O_LE_TYPE_SHIFT        4
135
136#define BFD_MACH_O_BE_PCREL             0x80
137#define BFD_MACH_O_BE_LENGTH_SHIFT      5
138#define BFD_MACH_O_BE_EXTERN            0x10
139#define BFD_MACH_O_BE_TYPE_SHIFT        0
140
141/* The field sizes are the same for both BE and LE.  */
142#define BFD_MACH_O_LENGTH_MASK          0x03
143#define BFD_MACH_O_TYPE_MASK            0x0f
144
145/* For a scattered reloc entry the info is contained in r_address.  There
146   is no need to discriminate on target endian-ness, since the design was
147   arranged to produce the same layout on both.  Scattered relocations are
148   only used for local items, therefore there is no 'extern' field.  */
149
150#define BFD_MACH_O_SR_PCREL             0x40000000
151#define BFD_MACH_O_GET_SR_LENGTH(s)     (((s) >> 28) & 0x3)
152#define BFD_MACH_O_GET_SR_TYPE(s)       (((s) >> 24) & 0x0f)
153#define BFD_MACH_O_GET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
154#define BFD_MACH_O_SET_SR_LENGTH(l)     (((l) & 0x3) << 28)
155#define BFD_MACH_O_SET_SR_TYPE(t)       (((t) & 0xf) << 24)
156#define BFD_MACH_O_SET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
157
158struct mach_o_symtab_command_external
159{
160  unsigned char symoff[4];      /* File offset of the symbol table.  */
161  unsigned char nsyms[4];       /* Number of symbols.  */
162  unsigned char stroff[4];      /* File offset of the string table.  */
163  unsigned char strsize[4];     /* String table size.  */
164};
165
166struct mach_o_nlist_external
167{
168  unsigned char n_strx[4];
169  unsigned char n_type[1];
170  unsigned char n_sect[1];
171  unsigned char n_desc[2];
172  unsigned char n_value[4];
173};
174#define BFD_MACH_O_NLIST_SIZE 12
175
176struct mach_o_nlist_64_external
177{
178  unsigned char n_strx[4];
179  unsigned char n_type[1];
180  unsigned char n_sect[1];
181  unsigned char n_desc[2];
182  unsigned char n_value[8];
183};
184#define BFD_MACH_O_NLIST_64_SIZE 16
185
186struct mach_o_thread_command_external
187{
188  unsigned char flavour[4];
189  unsigned char count[4];
190};
191
192/* For commands that just have a string or a path.  */
193struct mach_o_str_command_external
194{
195  unsigned char str[4];
196};
197
198struct mach_o_dylib_command_external
199{
200  unsigned char name[4];
201  unsigned char timestamp[4];
202  unsigned char current_version[4];
203  unsigned char compatibility_version[4];
204};
205
206struct mach_o_dysymtab_command_external
207{
208  unsigned char ilocalsym[4];   /* Index of.  */
209  unsigned char nlocalsym[4];   /* Number of.  */
210  unsigned char iextdefsym[4];
211  unsigned char nextdefsym[4];
212  unsigned char iundefsym[4];
213  unsigned char nundefsym[4];
214  unsigned char tocoff[4];
215  unsigned char ntoc[4];
216  unsigned char modtaboff[4];
217  unsigned char nmodtab[4];
218  unsigned char extrefsymoff[4];
219  unsigned char nextrefsyms[4];
220  unsigned char indirectsymoff[4];
221  unsigned char nindirectsyms[4];
222  unsigned char extreloff[4];
223  unsigned char nextrel[4];
224  unsigned char locreloff[4];
225  unsigned char nlocrel[4];
226};
227
228struct mach_o_dylib_module_external
229{
230  unsigned char module_name[4];
231  unsigned char iextdefsym[4];
232  unsigned char nextdefsym[4];
233  unsigned char irefsym[4];
234  unsigned char nrefsym[4];
235  unsigned char ilocalsym[4];
236  unsigned char nlocalsym[4];
237  unsigned char iextrel[4];
238  unsigned char nextrel[4];
239  unsigned char iinit_iterm[4];
240  unsigned char ninit_nterm[4];
241  unsigned char objc_module_info_addr[4];
242  unsigned char objc_module_info_size[4];
243};
244#define BFD_MACH_O_DYLIB_MODULE_SIZE 52
245
246struct mach_o_dylib_module_64_external
247{
248  unsigned char module_name[4];
249  unsigned char iextdefsym[4];
250  unsigned char nextdefsym[4];
251  unsigned char irefsym[4];
252  unsigned char nrefsym[4];
253  unsigned char ilocalsym[4];
254  unsigned char nlocalsym[4];
255  unsigned char iextrel[4];
256  unsigned char nextrel[4];
257  unsigned char iinit_iterm[4];
258  unsigned char ninit_nterm[4];
259  unsigned char objc_module_info_size[4];
260  unsigned char objc_module_info_addr[8];
261};
262#define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
263
264struct mach_o_dylib_table_of_contents_external
265{
266  unsigned char symbol_index[4];
267  unsigned char module_index[4];
268};
269#define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
270
271struct mach_o_linkedit_data_command_external
272{
273  unsigned char dataoff[4];
274  unsigned char datasize[4];
275};
276
277struct mach_o_dyld_info_command_external
278{
279  unsigned char rebase_off[4];
280  unsigned char rebase_size[4];
281  unsigned char bind_off[4];
282  unsigned char bind_size[4];
283  unsigned char weak_bind_off[4];
284  unsigned char weak_bind_size[4];
285  unsigned char lazy_bind_off[4];
286  unsigned char lazy_bind_size[4];
287  unsigned char export_off[4];
288  unsigned char export_size[4];
289};
290
291struct mach_o_version_min_command_external
292{
293  unsigned char version[4];
294  unsigned char reserved[4];
295};
296
297struct mach_o_encryption_info_command_external
298{
299  unsigned char cryptoff[4];    /* File offset of the encrypted area.  */
300  unsigned char cryptsize[4];   /* Size of the encrypted area.  */
301  unsigned char cryptid[4];     /* Encryption method.  */
302};
303
304struct mach_o_fvmlib_command_external
305{
306  unsigned char name[4];        /* Offset of the name.  */
307  unsigned char minor_version[4];
308  unsigned char header_addr[4];
309};
310
311struct mach_o_entry_point_command_external
312{
313  unsigned char entryoff[8];    /* File offset of the entry point.  */
314  unsigned char stacksize[8];   /* Initial stack size, if no null.  */
315};
316
317struct mach_o_source_version_command_external
318{
319  unsigned char version[8];     /* Version A.B.C.D.E, with 10 bits for B-E,
320                                   and 24 bits for A.  */
321};
322
323/* The LD_DATA_IN_CODE command use a linkedit_data_command that points to
324   a table of entries.  */
325
326struct mach_o_data_in_code_entry_external
327{
328  unsigned char offset[4];      /* Offset from the mach_header. */
329  unsigned char length[2];      /* Number of bytes.  */
330  unsigned char kind[2];        /* Kind.  See BFD_MACH_O_DICE_ values.  */
331};
332
333struct mach_o_fat_header_external
334{
335  unsigned char magic[4];
336  unsigned char nfat_arch[4];   /* Number of components.  */
337};
338
339struct mach_o_fat_arch_external
340{
341  unsigned char cputype[4];
342  unsigned char cpusubtype[4];
343  unsigned char offset[4];      /* File offset of the member.  */
344  unsigned char size[4];        /* Size of the member.  */
345  unsigned char align[4];       /* Power of 2.  */
346};
347
348#endif /* _MACH_O_EXTERNAL_H */
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