source: trunk/binutils/bfd/mach-o.h@ 2662

Last change on this file since 2662 was 607, checked in by bird, 22 years ago

Initial revision
  • Property cvs2svn:cvs-rev set to 1.1
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 20.0 KB
Line 
1/* Mach-O support for BFD.
2 Copyright 1999, 2000, 2001, 2002
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#ifndef _BFD_MACH_O_H_
22#define _BFD_MACH_O_H_
23
24#include "bfd.h"
25
26#define BFD_MACH_O_N_STAB 0xe0 /* If any of these bits set, a symbolic debugging entry. */
27#define BFD_MACH_O_N_PEXT 0x10 /* Private external symbol bit. */
28#define BFD_MACH_O_N_TYPE 0x0e /* Mask for the type bits. */
29#define BFD_MACH_O_N_EXT 0x01 /* External symbol bit, set for external symbols. */
30#define BFD_MACH_O_N_UNDF 0x00 /* Undefined, n_sect == NO_SECT. */
31#define BFD_MACH_O_N_ABS 0x02 /* Absolute, n_sect == NO_SECT. */
32#define BFD_MACH_O_N_SECT 0x0e /* Defined in section number n_sect. */
33#define BFD_MACH_O_N_PBUD 0x0c /* Prebound undefined (defined in a dylib). */
34#define BFD_MACH_O_N_INDR 0x0a /* Indirect. */
35
36typedef enum bfd_mach_o_ppc_thread_flavour
37 {
38 BFD_MACH_O_PPC_THREAD_STATE = 1,
39 BFD_MACH_O_PPC_FLOAT_STATE = 2,
40 BFD_MACH_O_PPC_EXCEPTION_STATE = 3,
41 BFD_MACH_O_PPC_VECTOR_STATE = 4
42 }
43bfd_mach_o_ppc_thread_flavour;
44
45typedef enum bfd_mach_o_i386_thread_flavour
46 {
47 BFD_MACH_O_i386_NEW_THREAD_STATE = 1,
48 BFD_MACH_O_i386_FLOAT_STATE = 2,
49 BFD_MACH_O_i386_ISA_PORT_MAP_STATE = 3,
50 BFD_MACH_O_i386_V86_ASSIST_STATE = 4,
51 BFD_MACH_O_i386_REGS_SEGS_STATE = 5,
52 BFD_MACH_O_i386_THREAD_SYSCALL_STATE = 6,
53 BFD_MACH_O_i386_THREAD_STATE_NONE = 7,
54 BFD_MACH_O_i386_SAVED_STATE = 8,
55 BFD_MACH_O_i386_THREAD_STATE = -1,
56 BFD_MACH_O_i386_THREAD_FPSTATE = -2,
57 BFD_MACH_O_i386_THREAD_EXCEPTSTATE = -3,
58 BFD_MACH_O_i386_THREAD_CTHREADSTATE = -4,
59 }
60bfd_mach_o_i386_thread_flavour;
61
62#define BFD_MACH_O_LC_REQ_DYLD 0x80000000
63
64typedef enum bfd_mach_o_load_command_type
65 {
66 BFD_MACH_O_LC_SEGMENT = 0x1, /* File segment to be mapped. */
67 BFD_MACH_O_LC_SYMTAB = 0x2, /* Link-edit stab symbol table info (obsolete). */
68 BFD_MACH_O_LC_SYMSEG = 0x3, /* Link-edit gdb symbol table info. */
69 BFD_MACH_O_LC_THREAD = 0x4, /* Thread. */
70 BFD_MACH_O_LC_UNIXTHREAD = 0x5, /* UNIX thread (includes a stack). */
71 BFD_MACH_O_LC_LOADFVMLIB = 0x6, /* Load a fixed VM shared library. */
72 BFD_MACH_O_LC_IDFVMLIB = 0x7, /* Fixed VM shared library id. */
73 BFD_MACH_O_LC_IDENT = 0x8, /* Object identification information (obsolete). */
74 BFD_MACH_O_LC_FVMFILE = 0x9, /* Fixed VM file inclusion. */
75 BFD_MACH_O_LC_PREPAGE = 0xa, /* Prepage command (internal use). */
76 BFD_MACH_O_LC_DYSYMTAB = 0xb, /* Dynamic link-edit symbol table info. */
77 BFD_MACH_O_LC_LOAD_DYLIB = 0xc, /* Load a dynamicly linked shared library. */
78 BFD_MACH_O_LC_ID_DYLIB = 0xd, /* Dynamicly linked shared lib identification. */
79 BFD_MACH_O_LC_LOAD_DYLINKER = 0xe, /* Load a dynamic linker. */
80 BFD_MACH_O_LC_ID_DYLINKER = 0xf, /* Dynamic linker identification. */
81 BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10,/* Modules prebound for a dynamicly. */
82 BFD_MACH_O_LC_ROUTINES = 0x11, /* Image routines. */
83 BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12, /* Sub framework. */
84 BFD_MACH_O_LC_SUB_UMBRELLA = 0x13, /* Sub umbrella. */
85 BFD_MACH_O_LC_SUB_CLIENT = 0x14, /* Sub client. */
86 BFD_MACH_O_LC_SUB_LIBRARY = 0x15, /* Sub library. */
87 BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16,/* Two-level namespace lookup hints. */
88 BFD_MACH_O_LC_PREBIND_CKSUM = 0x17, /* Prebind checksum. */
89 /* Load a dynamicly linked shared library that is allowed to be
90 missing (weak). */
91 BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18
92 }
93bfd_mach_o_load_command_type;
94
95typedef enum bfd_mach_o_cpu_type
96 {
97 BFD_MACH_O_CPU_TYPE_VAX = 1,
98 BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
99 BFD_MACH_O_CPU_TYPE_I386 = 7,
100 BFD_MACH_O_CPU_TYPE_MIPS = 8,
101 BFD_MACH_O_CPU_TYPE_MC98000 = 10,
102 BFD_MACH_O_CPU_TYPE_HPPA = 11,
103 BFD_MACH_O_CPU_TYPE_ARM = 12,
104 BFD_MACH_O_CPU_TYPE_MC88000 = 13,
105 BFD_MACH_O_CPU_TYPE_SPARC = 14,
106 BFD_MACH_O_CPU_TYPE_I860 = 15,
107 BFD_MACH_O_CPU_TYPE_ALPHA = 16,
108 BFD_MACH_O_CPU_TYPE_POWERPC = 18
109 }
110bfd_mach_o_cpu_type;
111
112typedef enum bfd_mach_o_filetype
113 {
114 BFD_MACH_O_MH_OBJECT = 1,
115 BFD_MACH_O_MH_EXECUTE = 2,
116 BFD_MACH_O_MH_FVMLIB = 3,
117 BFD_MACH_O_MH_CORE = 4,
118 BFD_MACH_O_MH_PRELOAD = 5,
119 BFD_MACH_O_MH_DYLIB = 6,
120 BFD_MACH_O_MH_DYLINKER = 7,
121 BFD_MACH_O_MH_BUNDLE = 8
122 }
123bfd_mach_o_filetype;
124
125/* Constants for the type of a section. */
126
127typedef enum bfd_mach_o_section_type
128 {
129 /* Regular section. */
130 BFD_MACH_O_S_REGULAR = 0x0,
131
132 /* Zero fill on demand section. */
133 BFD_MACH_O_S_ZEROFILL = 0x1,
134
135 /* Section with only literal C strings. */
136 BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
137
138 /* Section with only 4 byte literals. */
139 BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
140
141 /* Section with only 8 byte literals. */
142 BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
143
144 /* Section with only pointers to literals. */
145 BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
146
147 /* For the two types of symbol pointers sections and the symbol stubs
148 section they have indirect symbol table entries. For each of the
149 entries in the section the indirect symbol table entries, in
150 corresponding order in the indirect symbol table, start at the index
151 stored in the reserved1 field of the section structure. Since the
152 indirect symbol table entries correspond to the entries in the
153 section the number of indirect symbol table entries is inferred from
154 the size of the section divided by the size of the entries in the
155 section. For symbol pointers sections the size of the entries in
156 the section is 4 bytes and for symbol stubs sections the byte size
157 of the stubs is stored in the reserved2 field of the section
158 structure. */
159
160 /* Section with only non-lazy symbol pointers. */
161 BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
162
163 /* Section with only lazy symbol pointers. */
164 BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
165
166 /* Section with only symbol stubs, byte size of stub in the reserved2 field. */
167 BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
168
169 /* Section with only function pointers for initialization. */
170 BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9
171 }
172bfd_mach_o_section_type;
173
174typedef unsigned long bfd_mach_o_cpu_subtype;
175
176typedef struct bfd_mach_o_header
177{
178 unsigned long magic;
179 unsigned long cputype;
180 unsigned long cpusubtype;
181 unsigned long filetype;
182 unsigned long ncmds;
183 unsigned long sizeofcmds;
184 unsigned long flags;
185 enum bfd_endian byteorder;
186}
187bfd_mach_o_header;
188
189typedef struct bfd_mach_o_section
190{
191 asection *bfdsection;
192 char sectname[16 + 1];
193 char segname[16 + 1];
194 bfd_vma addr;
195 bfd_vma size;
196 bfd_vma offset;
197 unsigned long align;
198 bfd_vma reloff;
199 unsigned long nreloc;
200 unsigned long flags;
201 unsigned long reserved1;
202 unsigned long reserved2;
203}
204bfd_mach_o_section;
205
206typedef struct bfd_mach_o_segment_command
207{
208 char segname[16];
209 bfd_vma vmaddr;
210 bfd_vma vmsize;
211 bfd_vma fileoff;
212 unsigned long filesize;
213 unsigned long nsects;
214 unsigned long flags;
215 bfd_mach_o_section *sections;
216 asection *segment;
217}
218bfd_mach_o_segment_command;
219
220typedef struct bfd_mach_o_symtab_command
221{
222 unsigned long symoff;
223 unsigned long nsyms;
224 unsigned long stroff;
225 unsigned long strsize;
226 asymbol *symbols;
227 char *strtab;
228 asection *stabs_segment;
229 asection *stabstr_segment;
230}
231bfd_mach_o_symtab_command;
232
233/* This is the second set of the symbolic information which is used to support
234 the data structures for the dynamicly link editor.
235
236 The original set of symbolic information in the symtab_command which contains
237 the symbol and string tables must also be present when this load command is
238 present. When this load command is present the symbol table is organized
239 into three groups of symbols:
240 local symbols (static and debugging symbols) - grouped by module
241 defined external symbols - grouped by module (sorted by name if not lib)
242 undefined external symbols (sorted by name)
243 In this load command there are offsets and counts to each of the three groups
244 of symbols.
245
246 This load command contains a the offsets and sizes of the following new
247 symbolic information tables:
248 table of contents
249 module table
250 reference symbol table
251 indirect symbol table
252 The first three tables above (the table of contents, module table and
253 reference symbol table) are only present if the file is a dynamicly linked
254 shared library. For executable and object modules, which are files
255 containing only one module, the information that would be in these three
256 tables is determined as follows:
257 table of contents - the defined external symbols are sorted by name
258 module table - the file contains only one module so everything in the
259 file is part of the module.
260 reference symbol table - is the defined and undefined external symbols
261
262 For dynamicly linked shared library files this load command also contains
263 offsets and sizes to the pool of relocation entries for all sections
264 separated into two groups:
265 external relocation entries
266 local relocation entries
267 For executable and object modules the relocation entries continue to hang
268 off the section structures. */
269
270typedef struct bfd_mach_o_dysymtab_command
271{
272 /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
273 are grouped into the following three groups:
274 local symbols (further grouped by the module they are from)
275 defined external symbols (further grouped by the module they are from)
276 undefined symbols
277
278 The local symbols are used only for debugging. The dynamic binding
279 process may have to use them to indicate to the debugger the local
280 symbols for a module that is being bound.
281
282 The last two groups are used by the dynamic binding process to do the
283 binding (indirectly through the module table and the reference symbol
284 table when this is a dynamicly linked shared library file). */
285
286 unsigned long ilocalsym; /* Index to local symbols. */
287 unsigned long nlocalsym; /* Number of local symbols. */
288 unsigned long iextdefsym; /* Index to externally defined symbols. */
289 unsigned long nextdefsym; /* Number of externally defined symbols. */
290 unsigned long iundefsym; /* Index to undefined symbols. */
291 unsigned long nundefsym; /* Number of undefined symbols. */
292
293 /* For the for the dynamic binding process to find which module a symbol
294 is defined in the table of contents is used (analogous to the ranlib
295 structure in an archive) which maps defined external symbols to modules
296 they are defined in. This exists only in a dynamicly linked shared
297 library file. For executable and object modules the defined external
298 symbols are sorted by name and is use as the table of contents. */
299
300 unsigned long tocoff; /* File offset to table of contents. */
301 unsigned long ntoc; /* Number of entries in table of contents. */
302
303 /* To support dynamic binding of "modules" (whole object files) the symbol
304 table must reflect the modules that the file was created from. This is
305 done by having a module table that has indexes and counts into the merged
306 tables for each module. The module structure that these two entries
307 refer to is described below. This exists only in a dynamicly linked
308 shared library file. For executable and object modules the file only
309 contains one module so everything in the file belongs to the module. */
310
311 unsigned long modtaboff; /* File offset to module table. */
312 unsigned long nmodtab; /* Number of module table entries. */
313
314 /* To support dynamic module binding the module structure for each module
315 indicates the external references (defined and undefined) each module
316 makes. For each module there is an offset and a count into the
317 reference symbol table for the symbols that the module references.
318 This exists only in a dynamicly linked shared library file. For
319 executable and object modules the defined external symbols and the
320 undefined external symbols indicates the external references. */
321
322 unsigned long extrefsymoff; /* Offset to referenced symbol table. */
323 unsigned long nextrefsyms; /* Number of referenced symbol table entries. */
324
325 /* The sections that contain "symbol pointers" and "routine stubs" have
326 indexes and (implied counts based on the size of the section and fixed
327 size of the entry) into the "indirect symbol" table for each pointer
328 and stub. For every section of these two types the index into the
329 indirect symbol table is stored in the section header in the field
330 reserved1. An indirect symbol table entry is simply a 32bit index into
331 the symbol table to the symbol that the pointer or stub is referring to.
332 The indirect symbol table is ordered to match the entries in the section. */
333
334 unsigned long indirectsymoff; /* File offset to the indirect symbol table. */
335 unsigned long nindirectsyms; /* Number of indirect symbol table entries. */
336
337 /* To support relocating an individual module in a library file quickly the
338 external relocation entries for each module in the library need to be
339 accessed efficiently. Since the relocation entries can't be accessed
340 through the section headers for a library file they are separated into
341 groups of local and external entries further grouped by module. In this
342 case the presents of this load command who's extreloff, nextrel,
343 locreloff and nlocrel fields are non-zero indicates that the relocation
344 entries of non-merged sections are not referenced through the section
345 structures (and the reloff and nreloc fields in the section headers are
346 set to zero).
347
348 Since the relocation entries are not accessed through the section headers
349 this requires the r_address field to be something other than a section
350 offset to identify the item to be relocated. In this case r_address is
351 set to the offset from the vmaddr of the first LC_SEGMENT command.
352
353 The relocation entries are grouped by module and the module table
354 entries have indexes and counts into them for the group of external
355 relocation entries for that the module.
356
357 For sections that are merged across modules there must not be any
358 remaining external relocation entries for them (for merged sections
359 remaining relocation entries must be local). */
360
361 unsigned long extreloff; /* Offset to external relocation entries. */
362 unsigned long nextrel; /* Number of external relocation entries. */
363
364 /* All the local relocation entries are grouped together (they are not
365 grouped by their module since they are only used if the object is moved
366 from it staticly link edited address). */
367
368 unsigned long locreloff; /* Offset to local relocation entries. */
369 unsigned long nlocrel; /* Number of local relocation entries. */
370}
371bfd_mach_o_dysymtab_command;
372
373/* An indirect symbol table entry is simply a 32bit index into the symbol table
374 to the symbol that the pointer or stub is refering to. Unless it is for a
375 non-lazy symbol pointer section for a defined symbol which strip(1) as
376 removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the
377 symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */
378
379#define INDIRECT_SYMBOL_LOCAL 0x80000000
380#define INDIRECT_SYMBOL_ABS 0x40000000
381
382typedef struct bfd_mach_o_thread_flavour
383{
384 unsigned long flavour;
385 bfd_vma offset;
386 unsigned long size;
387}
388bfd_mach_o_thread_flavour;
389
390typedef struct bfd_mach_o_thread_command
391{
392 unsigned long nflavours;
393 bfd_mach_o_thread_flavour *flavours;
394 asection *section;
395}
396bfd_mach_o_thread_command;
397
398typedef struct bfd_mach_o_dylinker_command
399{
400 unsigned long cmd; /* LC_ID_DYLIB or LC_LOAD_DYLIB. */
401 unsigned long cmdsize; /* Includes pathname string. */
402 unsigned long name_offset; /* Offset to library's path name. */
403 unsigned long name_len; /* Offset to library's path name. */
404 asection *section;
405}
406bfd_mach_o_dylinker_command;
407
408typedef struct bfd_mach_o_dylib_command
409{
410 unsigned long cmd; /* LC_ID_DYLIB or LC_LOAD_DYLIB. */
411 unsigned long cmdsize; /* Includes pathname string. */
412 unsigned long name_offset; /* Offset to library's path name. */
413 unsigned long name_len; /* Offset to library's path name. */
414 unsigned long timestamp; /* Library's build time stamp. */
415 unsigned long current_version; /* Library's current version number. */
416 unsigned long compatibility_version; /* Library's compatibility vers number. */
417 asection *section;
418}
419bfd_mach_o_dylib_command;
420
421typedef struct bfd_mach_o_prebound_dylib_command
422{
423 unsigned long cmd; /* LC_PREBOUND_DYLIB. */
424 unsigned long cmdsize; /* Includes strings. */
425 unsigned long name; /* Library's path name. */
426 unsigned long nmodules; /* Number of modules in library. */
427 unsigned long linked_modules; /* Bit vector of linked modules. */
428 asection *section;
429}
430bfd_mach_o_prebound_dylib_command;
431
432typedef struct bfd_mach_o_load_command
433{
434 bfd_mach_o_load_command_type type;
435 unsigned int type_required;
436 bfd_vma offset;
437 bfd_vma len;
438 union
439 {
440 bfd_mach_o_segment_command segment;
441 bfd_mach_o_symtab_command symtab;
442 bfd_mach_o_dysymtab_command dysymtab;
443 bfd_mach_o_thread_command thread;
444 bfd_mach_o_dylib_command dylib;
445 bfd_mach_o_dylinker_command dylinker;
446 bfd_mach_o_prebound_dylib_command prebound_dylib;
447 }
448 command;
449}
450bfd_mach_o_load_command;
451
452typedef struct mach_o_data_struct
453{
454 bfd_mach_o_header header;
455 bfd_mach_o_load_command *commands;
456 unsigned long nsymbols;
457 asymbol *symbols;
458 unsigned long nsects;
459 bfd_mach_o_section **sections;
460 bfd *ibfd;
461}
462mach_o_data_struct;
463
464typedef struct mach_o_data_struct bfd_mach_o_data_struct;
465
466bfd_boolean bfd_mach_o_valid
467 PARAMS ((bfd *));
468int bfd_mach_o_scan_read_symtab_symbol
469 PARAMS ((bfd *, bfd_mach_o_symtab_command *, asymbol *, unsigned long));
470int bfd_mach_o_scan_read_symtab_strtab
471 PARAMS ((bfd *, bfd_mach_o_symtab_command *));
472int bfd_mach_o_scan_read_symtab_symbols
473 PARAMS ((bfd *, bfd_mach_o_symtab_command *));
474int bfd_mach_o_scan_read_dysymtab_symbol
475 PARAMS ((bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *,
476 asymbol *, unsigned long));
477int bfd_mach_o_scan_start_address
478 PARAMS ((bfd *));
479int bfd_mach_o_scan
480 PARAMS ((bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *));
481bfd_boolean bfd_mach_o_mkobject
482 PARAMS ((bfd *));
483const bfd_target * bfd_mach_o_object_p
484 PARAMS ((bfd *));
485const bfd_target * bfd_mach_o_core_p
486 PARAMS ((bfd *));
487const bfd_target * bfd_mach_o_archive_p
488 PARAMS ((bfd *));
489bfd * bfd_mach_o_openr_next_archived_file
490 PARAMS ((bfd *, bfd *));
491int bfd_mach_o_lookup_section
492 PARAMS ((bfd *, asection *, bfd_mach_o_load_command **,
493 bfd_mach_o_section **));
494int bfd_mach_o_lookup_command
495 PARAMS ((bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **));
496unsigned long bfd_mach_o_stack_addr
497 PARAMS ((enum bfd_mach_o_cpu_type));
498int bfd_mach_o_core_fetch_environment
499 PARAMS ((bfd *, unsigned char **, unsigned int *));
500char * bfd_mach_o_core_file_failing_command
501 PARAMS ((bfd *));
502int bfd_mach_o_core_file_failing_signal
503 PARAMS ((bfd *));
504bfd_boolean bfd_mach_o_core_file_matches_executable_p
505 PARAMS ((bfd *, bfd *));
506
507extern const bfd_target mach_o_be_vec;
508extern const bfd_target mach_o_le_vec;
509extern const bfd_target mach_o_fat_vec;
510
511#endif /* _BFD_MACH_O_H_ */
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