1 /* Mach-O support for BFD.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
22 #ifndef _BFD_MACH_O_H_
23 #define _BFD_MACH_O_H_
27 /* Symbol n_type values. */
28 #define BFD_MACH_O_N_STAB 0xe0 /* If any of these bits set, a symbolic debugging entry. */
29 #define BFD_MACH_O_N_PEXT 0x10 /* Private external symbol bit. */
30 #define BFD_MACH_O_N_TYPE 0x0e /* Mask for the type bits. */
31 #define BFD_MACH_O_N_EXT 0x01 /* External symbol bit, set for external symbols. */
32 #define BFD_MACH_O_N_UNDF 0x00 /* Undefined, n_sect == NO_SECT. */
33 #define BFD_MACH_O_N_ABS 0x02 /* Absolute, n_sect == NO_SECT. */
34 #define BFD_MACH_O_N_INDR 0x0a /* Indirect. */
35 #define BFD_MACH_O_N_PBUD 0x0c /* Prebound undefined (defined in a dylib). */
36 #define BFD_MACH_O_N_SECT 0x0e /* Defined in section number n_sect. */
38 #define BFD_MACH_O_NO_SECT 0 /* Symbol not in any section of the image. */
40 /* Symbol n_desc reference flags. */
41 #define BFD_MACH_O_REFERENCE_MASK 0x0f
42 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY 0x00
43 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY 0x01
44 #define BFD_MACH_O_REFERENCE_FLAG_DEFINED 0x02
45 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED 0x03
46 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY 0x04
47 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY 0x05
49 #define BFD_MACH_O_REFERENCED_DYNAMICALLY 0x10
50 #define BFD_MACH_O_N_DESC_DISCARDED 0x20
51 #define BFD_MACH_O_N_NO_DEAD_STRIP 0x20
52 #define BFD_MACH_O_N_WEAK_REF 0x40
53 #define BFD_MACH_O_N_WEAK_DEF 0x80
55 typedef enum bfd_mach_o_mach_header_magic
57 BFD_MACH_O_MH_MAGIC
= 0xfeedface,
58 BFD_MACH_O_MH_CIGAM
= 0xcefaedfe,
59 BFD_MACH_O_MH_MAGIC_64
= 0xfeedfacf,
60 BFD_MACH_O_MH_CIGAM_64
= 0xcffaedfe
62 bfd_mach_o_mach_header_magic
;
64 typedef enum bfd_mach_o_ppc_thread_flavour
66 BFD_MACH_O_PPC_THREAD_STATE
= 1,
67 BFD_MACH_O_PPC_FLOAT_STATE
= 2,
68 BFD_MACH_O_PPC_EXCEPTION_STATE
= 3,
69 BFD_MACH_O_PPC_VECTOR_STATE
= 4,
70 BFD_MACH_O_PPC_THREAD_STATE64
= 5,
71 BFD_MACH_O_PPC_EXCEPTION_STATE64
= 6,
72 BFD_MACH_O_PPC_THREAD_STATE_NONE
= 7
74 bfd_mach_o_ppc_thread_flavour
;
76 /* Defined in <mach/i386/thread_status.h> */
77 typedef enum bfd_mach_o_i386_thread_flavour
79 BFD_MACH_O_x86_THREAD_STATE32
= 1,
80 BFD_MACH_O_x86_FLOAT_STATE32
= 2,
81 BFD_MACH_O_x86_EXCEPTION_STATE32
= 3,
82 BFD_MACH_O_x86_THREAD_STATE64
= 4,
83 BFD_MACH_O_x86_FLOAT_STATE64
= 5,
84 BFD_MACH_O_x86_EXCEPTION_STATE64
= 6,
85 BFD_MACH_O_x86_THREAD_STATE
= 7,
86 BFD_MACH_O_x86_FLOAT_STATE
= 8,
87 BFD_MACH_O_x86_EXCEPTION_STATE
= 9,
88 BFD_MACH_O_x86_DEBUG_STATE32
= 10,
89 BFD_MACH_O_x86_DEBUG_STATE64
= 11,
90 BFD_MACH_O_x86_DEBUG_STATE
= 12,
91 BFD_MACH_O_x86_THREAD_STATE_NONE
= 13
93 bfd_mach_o_i386_thread_flavour
;
95 #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
97 typedef enum bfd_mach_o_load_command_type
99 BFD_MACH_O_LC_SEGMENT
= 0x1, /* File segment to be mapped. */
100 BFD_MACH_O_LC_SYMTAB
= 0x2, /* Link-edit stab symbol table info (obsolete). */
101 BFD_MACH_O_LC_SYMSEG
= 0x3, /* Link-edit gdb symbol table info. */
102 BFD_MACH_O_LC_THREAD
= 0x4, /* Thread. */
103 BFD_MACH_O_LC_UNIXTHREAD
= 0x5, /* UNIX thread (includes a stack). */
104 BFD_MACH_O_LC_LOADFVMLIB
= 0x6, /* Load a fixed VM shared library. */
105 BFD_MACH_O_LC_IDFVMLIB
= 0x7, /* Fixed VM shared library id. */
106 BFD_MACH_O_LC_IDENT
= 0x8, /* Object identification information (obsolete). */
107 BFD_MACH_O_LC_FVMFILE
= 0x9, /* Fixed VM file inclusion. */
108 BFD_MACH_O_LC_PREPAGE
= 0xa, /* Prepage command (internal use). */
109 BFD_MACH_O_LC_DYSYMTAB
= 0xb, /* Dynamic link-edit symbol table info. */
110 BFD_MACH_O_LC_LOAD_DYLIB
= 0xc, /* Load a dynamically linked shared library. */
111 BFD_MACH_O_LC_ID_DYLIB
= 0xd, /* Dynamically linked shared lib identification. */
112 BFD_MACH_O_LC_LOAD_DYLINKER
= 0xe, /* Load a dynamic linker. */
113 BFD_MACH_O_LC_ID_DYLINKER
= 0xf, /* Dynamic linker identification. */
114 BFD_MACH_O_LC_PREBOUND_DYLIB
= 0x10, /* Modules prebound for a dynamically. */
115 BFD_MACH_O_LC_ROUTINES
= 0x11, /* Image routines. */
116 BFD_MACH_O_LC_SUB_FRAMEWORK
= 0x12, /* Sub framework. */
117 BFD_MACH_O_LC_SUB_UMBRELLA
= 0x13, /* Sub umbrella. */
118 BFD_MACH_O_LC_SUB_CLIENT
= 0x14, /* Sub client. */
119 BFD_MACH_O_LC_SUB_LIBRARY
= 0x15, /* Sub library. */
120 BFD_MACH_O_LC_TWOLEVEL_HINTS
= 0x16, /* Two-level namespace lookup hints. */
121 BFD_MACH_O_LC_PREBIND_CKSUM
= 0x17, /* Prebind checksum. */
122 /* Load a dynamically linked shared library that is allowed to be
124 BFD_MACH_O_LC_LOAD_WEAK_DYLIB
= 0x18,
125 BFD_MACH_O_LC_SEGMENT_64
= 0x19, /* 64-bit segment of this file to be
127 BFD_MACH_O_LC_ROUTINES_64
= 0x1a, /* Address of the dyld init routine
129 BFD_MACH_O_LC_UUID
= 0x1b, /* 128-bit UUID of the executable. */
130 BFD_MACH_O_LC_RPATH
= 0x1c, /* Run path addiions. */
131 BFD_MACH_O_LC_CODE_SIGNATURE
= 0x1d, /* Local of code signature. */
132 BFD_MACH_O_LC_SEGMENT_SPLIT_INFO
= 0x1e, /* Local of info to split seg. */
133 BFD_MACH_O_LC_REEXPORT_DYLIB
= 0x1f, /* Load and re-export lib. */
134 BFD_MACH_O_LC_LAZY_LOAD_DYLIB
= 0x20, /* Delay load of lib until use. */
135 BFD_MACH_O_LC_ENCRYPTION_INFO
= 0x21, /* Encrypted segment info. */
136 BFD_MACH_O_LC_DYLD_INFO
= 0x22 /* Compressed dyld information. */
138 bfd_mach_o_load_command_type
;
140 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
142 typedef enum bfd_mach_o_cpu_type
144 BFD_MACH_O_CPU_TYPE_VAX
= 1,
145 BFD_MACH_O_CPU_TYPE_MC680x0
= 6,
146 BFD_MACH_O_CPU_TYPE_I386
= 7,
147 BFD_MACH_O_CPU_TYPE_MIPS
= 8,
148 BFD_MACH_O_CPU_TYPE_MC98000
= 10,
149 BFD_MACH_O_CPU_TYPE_HPPA
= 11,
150 BFD_MACH_O_CPU_TYPE_ARM
= 12,
151 BFD_MACH_O_CPU_TYPE_MC88000
= 13,
152 BFD_MACH_O_CPU_TYPE_SPARC
= 14,
153 BFD_MACH_O_CPU_TYPE_I860
= 15,
154 BFD_MACH_O_CPU_TYPE_ALPHA
= 16,
155 BFD_MACH_O_CPU_TYPE_POWERPC
= 18,
156 BFD_MACH_O_CPU_TYPE_POWERPC_64
= (BFD_MACH_O_CPU_TYPE_POWERPC
| BFD_MACH_O_CPU_IS64BIT
),
157 BFD_MACH_O_CPU_TYPE_X86_64
= (BFD_MACH_O_CPU_TYPE_I386
| BFD_MACH_O_CPU_IS64BIT
)
161 typedef enum bfd_mach_o_cpu_subtype
163 BFD_MACH_O_CPU_SUBTYPE_X86_ALL
= 3
165 bfd_mach_o_cpu_subtype
;
167 typedef enum bfd_mach_o_filetype
169 BFD_MACH_O_MH_OBJECT
= 1,
170 BFD_MACH_O_MH_EXECUTE
= 2,
171 BFD_MACH_O_MH_FVMLIB
= 3,
172 BFD_MACH_O_MH_CORE
= 4,
173 BFD_MACH_O_MH_PRELOAD
= 5,
174 BFD_MACH_O_MH_DYLIB
= 6,
175 BFD_MACH_O_MH_DYLINKER
= 7,
176 BFD_MACH_O_MH_BUNDLE
= 8
180 typedef enum bfd_mach_o_header_flags
182 BFD_MACH_O_MH_NOUNDEFS
= 0x000001,
183 BFD_MACH_O_MH_INCRLINK
= 0x000002,
184 BFD_MACH_O_MH_DYLDLINK
= 0x000004,
185 BFD_MACH_O_MH_BINDATLOAD
= 0x000008,
186 BFD_MACH_O_MH_PREBOUND
= 0x000010,
187 BFD_MACH_O_MH_SPLIT_SEGS
= 0x000020,
188 BFD_MACH_O_MH_LAZY_INIT
= 0x000040,
189 BFD_MACH_O_MH_TWOLEVEL
= 0x000080,
190 BFD_MACH_O_MH_FORCE_FLAT
= 0x000100,
191 BFD_MACH_O_MH_NOMULTIDEFS
= 0x000200,
192 BFD_MACH_O_MH_NOFIXPREBINDING
= 0x000400,
193 BFD_MACH_O_MH_PREBINDABLE
= 0x000800,
194 BFD_MACH_O_MH_ALLMODSBOUND
= 0x001000,
195 BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS
= 0x002000,
196 BFD_MACH_O_MH_CANONICAL
= 0x004000,
197 BFD_MACH_O_MH_WEAK_DEFINES
= 0x008000,
198 BFD_MACH_O_MH_BINDS_TO_WEAK
= 0x010000,
199 BFD_MACH_O_MH_ALLOW_STACK_EXECUTION
= 0x020000,
200 BFD_MACH_O_MH_ROOT_SAFE
= 0x040000,
201 BFD_MACH_O_MH_SETUID_SAFE
= 0x080000,
202 BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS
= 0x100000,
203 BFD_MACH_O_MH_PIE
= 0x200000
205 bfd_mach_o_header_flags
;
207 /* Constants for the type of a section. */
209 typedef enum bfd_mach_o_section_type
211 /* Regular section. */
212 BFD_MACH_O_S_REGULAR
= 0x0,
214 /* Zero fill on demand section. */
215 BFD_MACH_O_S_ZEROFILL
= 0x1,
217 /* Section with only literal C strings. */
218 BFD_MACH_O_S_CSTRING_LITERALS
= 0x2,
220 /* Section with only 4 byte literals. */
221 BFD_MACH_O_S_4BYTE_LITERALS
= 0x3,
223 /* Section with only 8 byte literals. */
224 BFD_MACH_O_S_8BYTE_LITERALS
= 0x4,
226 /* Section with only pointers to literals. */
227 BFD_MACH_O_S_LITERAL_POINTERS
= 0x5,
229 /* For the two types of symbol pointers sections and the symbol stubs
230 section they have indirect symbol table entries. For each of the
231 entries in the section the indirect symbol table entries, in
232 corresponding order in the indirect symbol table, start at the index
233 stored in the reserved1 field of the section structure. Since the
234 indirect symbol table entries correspond to the entries in the
235 section the number of indirect symbol table entries is inferred from
236 the size of the section divided by the size of the entries in the
237 section. For symbol pointers sections the size of the entries in
238 the section is 4 bytes and for symbol stubs sections the byte size
239 of the stubs is stored in the reserved2 field of the section
242 /* Section with only non-lazy symbol pointers. */
243 BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
= 0x6,
245 /* Section with only lazy symbol pointers. */
246 BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
= 0x7,
248 /* Section with only symbol stubs, byte size of stub in the reserved2
250 BFD_MACH_O_S_SYMBOL_STUBS
= 0x8,
252 /* Section with only function pointers for initialization. */
253 BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS
= 0x9,
255 /* Section with only function pointers for termination. */
256 BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS
= 0xa,
258 /* Section contains symbols that are coalesced by the linkers. */
259 BFD_MACH_O_S_COALESCED
= 0xb,
261 /* Zero fill on demand section (possibly larger than 4 GB). */
262 BFD_MACH_O_S_GB_ZEROFILL
= 0xc,
264 /* Section with only pairs of function pointers for interposing. */
265 BFD_MACH_O_S_INTERPOSING
= 0xd,
267 /* Section with only 16 byte literals. */
268 BFD_MACH_O_S_16BYTE_LITERALS
= 0xe,
270 /* Section contains DTrace Object Format. */
271 BFD_MACH_O_S_DTRACE_DOF
= 0xf,
273 /* Section with only lazy symbol pointers to lazy loaded dylibs. */
274 BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS
= 0x10
276 bfd_mach_o_section_type
;
278 /* The flags field of a section structure is separated into two parts a section
279 type and section attributes. The section types are mutually exclusive (it
280 can only have one type) but the section attributes are not (it may have more
281 than one attribute). */
283 #define BFD_MACH_O_SECTION_TYPE_MASK 0x000000ff
285 /* Constants for the section attributes part of the flags field of a section
287 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK 0xffffff00
288 /* System setable attributes. */
289 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS 0x00ffff00
290 /* User attributes. */
291 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR 0xff000000
293 typedef enum bfd_mach_o_section_attribute
295 /* Section has local relocation entries. */
296 BFD_MACH_O_S_ATTR_LOC_RELOC
= 0x00000100,
298 /* Section has external relocation entries. */
299 BFD_MACH_O_S_ATTR_EXT_RELOC
= 0x00000200,
301 /* Section contains some machine instructions. */
302 BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
= 0x00000400,
304 /* A debug section. */
305 BFD_MACH_O_S_ATTR_DEBUG
= 0x02000000,
307 /* Used with i386 stubs. */
308 BFD_MACH_O_S_SELF_MODIFYING_CODE
= 0x04000000,
310 /* Blocks are live if they reference live blocks. */
311 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
= 0x08000000,
313 /* No dead stripping. */
314 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP
= 0x10000000,
316 /* Section symbols can be stripped in files with MH_DYLDLINK flag. */
317 BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
= 0x20000000,
319 /* Section contains coalesced symbols that are not to be in the TOC of an
321 BFD_MACH_O_S_ATTR_NO_TOC
= 0x40000000,
323 /* Section contains only true machine instructions. */
324 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
= 0x80000000
326 bfd_mach_o_section_attribute
;
328 typedef struct bfd_mach_o_header
331 unsigned long cputype
;
332 unsigned long cpusubtype
;
333 unsigned long filetype
;
335 unsigned long sizeofcmds
;
337 unsigned int reserved
;
338 /* Version 1: 32 bits, version 2: 64 bits. */
339 unsigned int version
;
340 enum bfd_endian byteorder
;
344 #define BFD_MACH_O_HEADER_SIZE 28
345 #define BFD_MACH_O_HEADER_64_SIZE 32
347 typedef struct bfd_mach_o_section
349 asection
*bfdsection
;
350 char sectname
[16 + 1];
351 char segname
[16 + 1];
357 unsigned long nreloc
;
359 unsigned long reserved1
;
360 unsigned long reserved2
;
361 unsigned long reserved3
;
364 #define BFD_MACH_O_SECTION_SIZE 68
365 #define BFD_MACH_O_SECTION_64_SIZE 80
367 typedef struct bfd_mach_o_segment_command
369 char segname
[16 + 1];
373 unsigned long filesize
;
374 unsigned long maxprot
; /* Maximum permitted protection. */
375 unsigned long initprot
; /* Initial protection. */
376 unsigned long nsects
;
378 bfd_mach_o_section
*sections
;
380 bfd_mach_o_segment_command
;
381 #define BFD_MACH_O_LC_SEGMENT_SIZE 56
382 #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72
384 /* Protection flags. */
385 #define BFD_MACH_O_PROT_READ 0x01
386 #define BFD_MACH_O_PROT_WRITE 0x02
387 #define BFD_MACH_O_PROT_EXECUTE 0x04
389 /* Generic relocation types (used by i386). */
390 #define BFD_MACH_O_GENERIC_RELOC_VANILLA 0
391 #define BFD_MACH_O_GENERIC_RELOC_PAIR 1
392 #define BFD_MACH_O_GENERIC_RELOC_SECTDIFF 2
393 #define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR 3
394 #define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
396 /* Size of a relocation entry. */
397 #define BFD_MACH_O_RELENT_SIZE 8
399 /* Fields for a normal (non-scattered) entry. */
400 #define BFD_MACH_O_R_PCREL 0x01000000
401 #define BFD_MACH_O_GET_R_LENGTH(s) (((s) >> 25) & 0x3)
402 #define BFD_MACH_O_R_EXTERN 0x08000000
403 #define BFD_MACH_O_GET_R_TYPE(s) (((s) >> 28) & 0x0f)
404 #define BFD_MACH_O_GET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
405 #define BFD_MACH_O_SET_R_LENGTH(l) (((l) & 0x3) << 25)
406 #define BFD_MACH_O_SET_R_TYPE(t) (((t) & 0xf) << 28)
407 #define BFD_MACH_O_SET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
409 /* Fields for a scattered entry. */
410 #define BFD_MACH_O_SR_SCATTERED 0x80000000
411 #define BFD_MACH_O_SR_PCREL 0x40000000
412 #define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3)
413 #define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f)
414 #define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff)
415 #define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28)
416 #define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24)
417 #define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff)
419 /* Expanded internal representation of a relocation entry. */
420 typedef struct bfd_mach_o_reloc_info
424 unsigned int r_scattered
: 1;
425 unsigned int r_type
: 4;
426 unsigned int r_pcrel
: 1;
427 unsigned int r_length
: 2;
428 unsigned int r_extern
: 1;
430 bfd_mach_o_reloc_info
;
432 typedef struct bfd_mach_o_asymbol
434 /* The actual symbol which the rest of BFD works with. */
437 /* Fields from Mach-O symbol. */
438 unsigned char n_type
;
439 unsigned char n_sect
;
440 unsigned short n_desc
;
443 #define BFD_MACH_O_NLIST_SIZE 12
444 #define BFD_MACH_O_NLIST_64_SIZE 16
446 typedef struct bfd_mach_o_symtab_command
451 unsigned int strsize
;
452 bfd_mach_o_asymbol
*symbols
;
455 bfd_mach_o_symtab_command
;
457 /* This is the second set of the symbolic information which is used to support
458 the data structures for the dynamically link editor.
460 The original set of symbolic information in the symtab_command which contains
461 the symbol and string tables must also be present when this load command is
462 present. When this load command is present the symbol table is organized
463 into three groups of symbols:
464 local symbols (static and debugging symbols) - grouped by module
465 defined external symbols - grouped by module (sorted by name if not lib)
466 undefined external symbols (sorted by name)
467 In this load command there are offsets and counts to each of the three groups
470 This load command contains a the offsets and sizes of the following new
471 symbolic information tables:
474 reference symbol table
475 indirect symbol table
476 The first three tables above (the table of contents, module table and
477 reference symbol table) are only present if the file is a dynamically linked
478 shared library. For executable and object modules, which are files
479 containing only one module, the information that would be in these three
480 tables is determined as follows:
481 table of contents - the defined external symbols are sorted by name
482 module table - the file contains only one module so everything in the
483 file is part of the module.
484 reference symbol table - is the defined and undefined external symbols
486 For dynamically linked shared library files this load command also contains
487 offsets and sizes to the pool of relocation entries for all sections
488 separated into two groups:
489 external relocation entries
490 local relocation entries
491 For executable and object modules the relocation entries continue to hang
492 off the section structures. */
494 typedef struct bfd_mach_o_dylib_module
496 /* Index into the string table indicating the name of the module. */
497 unsigned long module_name_idx
;
500 /* Index into the symbol table of the first defined external symbol provided
502 unsigned long iextdefsym
;
504 /* Number of external symbols provided by this module. */
505 unsigned long nextdefsym
;
507 /* Index into the external reference table of the first entry
508 provided by this module. */
509 unsigned long irefsym
;
511 /* Number of external reference entries provided by this module. */
512 unsigned long nrefsym
;
514 /* Index into the symbol table of the first local symbol provided by this
516 unsigned long ilocalsym
;
518 /* Number of local symbols provided by this module. */
519 unsigned long nlocalsym
;
521 /* Index into the external relocation table of the first entry provided
523 unsigned long iextrel
;
525 /* Number of external relocation entries provided by this module. */
526 unsigned long nextrel
;
528 /* Index in the module initialization section to the pointers for this
530 unsigned short iinit
;
532 /* Index in the module termination section to the pointers for this
534 unsigned short iterm
;
536 /* Number of pointers in the module initialization for this module. */
537 unsigned short ninit
;
539 /* Number of pointers in the module termination for this module. */
540 unsigned short nterm
;
542 /* Number of data byte for this module that are used in the __module_info
543 section of the __OBJC segment. */
544 unsigned long objc_module_info_size
;
546 /* Statically linked address of the start of the data for this module
547 in the __module_info section of the __OBJC_segment. */
548 bfd_vma objc_module_info_addr
;
550 bfd_mach_o_dylib_module
;
551 #define BFD_MACH_O_DYLIB_MODULE_SIZE 52
552 #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
554 typedef struct bfd_mach_o_dylib_table_of_content
556 /* Index into the symbol table to the defined external symbol. */
557 unsigned long symbol_index
;
559 /* Index into the module table to the module for this entry. */
560 unsigned long module_index
;
562 bfd_mach_o_dylib_table_of_content
;
563 #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
565 typedef struct bfd_mach_o_dylib_reference
567 /* Index into the symbol table for the symbol being referenced. */
570 /* Type of the reference being made (use REFERENCE_FLAGS constants). */
573 bfd_mach_o_dylib_reference
;
574 #define BFD_MACH_O_REFERENCE_SIZE 4
576 typedef struct bfd_mach_o_dysymtab_command
578 /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
579 are grouped into the following three groups:
580 local symbols (further grouped by the module they are from)
581 defined external symbols (further grouped by the module they are from)
584 The local symbols are used only for debugging. The dynamic binding
585 process may have to use them to indicate to the debugger the local
586 symbols for a module that is being bound.
588 The last two groups are used by the dynamic binding process to do the
589 binding (indirectly through the module table and the reference symbol
590 table when this is a dynamically linked shared library file). */
592 unsigned long ilocalsym
; /* Index to local symbols. */
593 unsigned long nlocalsym
; /* Number of local symbols. */
594 unsigned long iextdefsym
; /* Index to externally defined symbols. */
595 unsigned long nextdefsym
; /* Number of externally defined symbols. */
596 unsigned long iundefsym
; /* Index to undefined symbols. */
597 unsigned long nundefsym
; /* Number of undefined symbols. */
599 /* For the for the dynamic binding process to find which module a symbol
600 is defined in the table of contents is used (analogous to the ranlib
601 structure in an archive) which maps defined external symbols to modules
602 they are defined in. This exists only in a dynamically linked shared
603 library file. For executable and object modules the defined external
604 symbols are sorted by name and is use as the table of contents. */
606 unsigned long tocoff
; /* File offset to table of contents. */
607 unsigned long ntoc
; /* Number of entries in table of contents. */
609 /* To support dynamic binding of "modules" (whole object files) the symbol
610 table must reflect the modules that the file was created from. This is
611 done by having a module table that has indexes and counts into the merged
612 tables for each module. The module structure that these two entries
613 refer to is described below. This exists only in a dynamically linked
614 shared library file. For executable and object modules the file only
615 contains one module so everything in the file belongs to the module. */
617 unsigned long modtaboff
; /* File offset to module table. */
618 unsigned long nmodtab
; /* Number of module table entries. */
620 /* To support dynamic module binding the module structure for each module
621 indicates the external references (defined and undefined) each module
622 makes. For each module there is an offset and a count into the
623 reference symbol table for the symbols that the module references.
624 This exists only in a dynamically linked shared library file. For
625 executable and object modules the defined external symbols and the
626 undefined external symbols indicates the external references. */
628 unsigned long extrefsymoff
; /* Offset to referenced symbol table. */
629 unsigned long nextrefsyms
; /* Number of referenced symbol table entries. */
631 /* The sections that contain "symbol pointers" and "routine stubs" have
632 indexes and (implied counts based on the size of the section and fixed
633 size of the entry) into the "indirect symbol" table for each pointer
634 and stub. For every section of these two types the index into the
635 indirect symbol table is stored in the section header in the field
636 reserved1. An indirect symbol table entry is simply a 32bit index into
637 the symbol table to the symbol that the pointer or stub is referring to.
638 The indirect symbol table is ordered to match the entries in the section. */
640 unsigned long indirectsymoff
; /* File offset to the indirect symbol table. */
641 unsigned long nindirectsyms
; /* Number of indirect symbol table entries. */
643 /* To support relocating an individual module in a library file quickly the
644 external relocation entries for each module in the library need to be
645 accessed efficiently. Since the relocation entries can't be accessed
646 through the section headers for a library file they are separated into
647 groups of local and external entries further grouped by module. In this
648 case the presents of this load command who's extreloff, nextrel,
649 locreloff and nlocrel fields are non-zero indicates that the relocation
650 entries of non-merged sections are not referenced through the section
651 structures (and the reloff and nreloc fields in the section headers are
654 Since the relocation entries are not accessed through the section headers
655 this requires the r_address field to be something other than a section
656 offset to identify the item to be relocated. In this case r_address is
657 set to the offset from the vmaddr of the first LC_SEGMENT command.
659 The relocation entries are grouped by module and the module table
660 entries have indexes and counts into them for the group of external
661 relocation entries for that the module.
663 For sections that are merged across modules there must not be any
664 remaining external relocation entries for them (for merged sections
665 remaining relocation entries must be local). */
667 unsigned long extreloff
; /* Offset to external relocation entries. */
668 unsigned long nextrel
; /* Number of external relocation entries. */
670 /* All the local relocation entries are grouped together (they are not
671 grouped by their module since they are only used if the object is moved
672 from it statically link edited address). */
674 unsigned long locreloff
; /* Offset to local relocation entries. */
675 unsigned long nlocrel
; /* Number of local relocation entries. */
677 bfd_mach_o_dylib_module
*dylib_module
;
678 bfd_mach_o_dylib_table_of_content
*dylib_toc
;
679 unsigned int *indirect_syms
;
680 bfd_mach_o_dylib_reference
*ext_refs
;
682 bfd_mach_o_dysymtab_command
;
684 /* An indirect symbol table entry is simply a 32bit index into the symbol table
685 to the symbol that the pointer or stub is refering to. Unless it is for a
686 non-lazy symbol pointer section for a defined symbol which strip(1) has
687 removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the
688 symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */
690 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
691 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS 0x40000000
692 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE 4
694 /* For LC_THREAD or LC_UNIXTHREAD. */
696 typedef struct bfd_mach_o_thread_flavour
698 unsigned long flavour
;
699 unsigned long offset
;
702 bfd_mach_o_thread_flavour
;
704 typedef struct bfd_mach_o_thread_command
706 unsigned long nflavours
;
707 bfd_mach_o_thread_flavour
*flavours
;
710 bfd_mach_o_thread_command
;
712 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER. */
714 typedef struct bfd_mach_o_dylinker_command
716 unsigned long name_offset
; /* Offset to library's path name. */
717 unsigned long name_len
; /* Offset to library's path name. */
720 bfd_mach_o_dylinker_command
;
722 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
723 or LC_REEXPORT_DYLIB. */
725 typedef struct bfd_mach_o_dylib_command
727 unsigned long name_offset
; /* Offset to library's path name. */
728 unsigned long name_len
; /* Offset to library's path name. */
729 unsigned long timestamp
; /* Library's build time stamp. */
730 unsigned long current_version
; /* Library's current version number. */
731 unsigned long compatibility_version
; /* Library's compatibility vers number. */
734 bfd_mach_o_dylib_command
;
736 /* For LC_PREBOUND_DYLIB. */
738 typedef struct bfd_mach_o_prebound_dylib_command
740 unsigned long name
; /* Library's path name. */
741 unsigned long nmodules
; /* Number of modules in library. */
742 unsigned long linked_modules
; /* Bit vector of linked modules. */
744 bfd_mach_o_prebound_dylib_command
;
748 typedef struct bfd_mach_o_uuid_command
750 unsigned char uuid
[16];
753 bfd_mach_o_uuid_command
;
755 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO. */
757 typedef struct bfd_mach_o_linkedit_command
759 unsigned long dataoff
;
760 unsigned long datasize
;
762 bfd_mach_o_linkedit_command
;
764 typedef struct bfd_mach_o_str_command
766 unsigned long stroff
;
767 unsigned long str_len
;
770 bfd_mach_o_str_command
;
772 typedef struct bfd_mach_o_dyld_info_command
774 /* File offset and size to rebase info. */
775 unsigned int rebase_off
;
776 unsigned int rebase_size
;
778 /* File offset and size of binding info. */
779 unsigned int bind_off
;
780 unsigned int bind_size
;
782 /* File offset and size of weak binding info. */
783 unsigned int weak_bind_off
;
784 unsigned int weak_bind_size
;
786 /* File offset and size of lazy binding info. */
787 unsigned int lazy_bind_off
;
788 unsigned int lazy_bind_size
;
790 /* File offset and size of export info. */
791 unsigned int export_off
;
792 unsigned int export_size
;
794 bfd_mach_o_dyld_info_command
;
796 typedef struct bfd_mach_o_load_command
798 bfd_mach_o_load_command_type type
;
799 bfd_boolean type_required
;
804 bfd_mach_o_segment_command segment
;
805 bfd_mach_o_symtab_command symtab
;
806 bfd_mach_o_dysymtab_command dysymtab
;
807 bfd_mach_o_thread_command thread
;
808 bfd_mach_o_dylib_command dylib
;
809 bfd_mach_o_dylinker_command dylinker
;
810 bfd_mach_o_prebound_dylib_command prebound_dylib
;
811 bfd_mach_o_uuid_command uuid
;
812 bfd_mach_o_linkedit_command linkedit
;
813 bfd_mach_o_str_command str
;
814 bfd_mach_o_dyld_info_command dyld_info
;
818 bfd_mach_o_load_command
;
820 typedef struct mach_o_data_struct
823 bfd_mach_o_header header
;
824 /* Array of load commands (length is given by header.ncmds). */
825 bfd_mach_o_load_command
*commands
;
827 /* Flatten array of sections. The array is 0-based. */
828 unsigned long nsects
;
829 bfd_mach_o_section
**sections
;
831 /* Used while writting: current length of the output file. This is used
832 to allocate space in the file. */
835 /* As symtab is referenced by other load command, it is handy to have
836 a direct access to it. Also it is not clearly stated, only one symtab
838 bfd_mach_o_symtab_command
*symtab
;
839 bfd_mach_o_dysymtab_command
*dysymtab
;
841 bfd_mach_o_data_struct
;
843 /* Target specific routines. */
844 typedef struct bfd_mach_o_backend_data
846 bfd_boolean (*_bfd_mach_o_swap_reloc_in
)(arelent
*, bfd_mach_o_reloc_info
*);
847 bfd_boolean (*_bfd_mach_o_swap_reloc_out
)(arelent
*, bfd_mach_o_reloc_info
*);
848 bfd_boolean (*_bfd_mach_o_print_thread
)(bfd
*, bfd_mach_o_thread_flavour
*,
851 bfd_mach_o_backend_data
;
853 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
854 #define bfd_mach_o_get_backend_data(abfd) \
855 ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
857 bfd_boolean
bfd_mach_o_valid (bfd
*);
858 int bfd_mach_o_scan_read_dysymtab_symbol (bfd
*, bfd_mach_o_dysymtab_command
*, bfd_mach_o_symtab_command
*, bfd_mach_o_asymbol
*, unsigned long);
859 int bfd_mach_o_scan_start_address (bfd
*);
860 int bfd_mach_o_scan (bfd
*, bfd_mach_o_header
*, bfd_mach_o_data_struct
*);
861 bfd_boolean
bfd_mach_o_mkobject_init (bfd
*);
862 const bfd_target
*bfd_mach_o_object_p (bfd
*);
863 const bfd_target
*bfd_mach_o_core_p (bfd
*);
864 const bfd_target
*bfd_mach_o_archive_p (bfd
*);
865 bfd
*bfd_mach_o_openr_next_archived_file (bfd
*, bfd
*);
866 int bfd_mach_o_lookup_section (bfd
*, asection
*, bfd_mach_o_load_command
**, bfd_mach_o_section
**);
867 int bfd_mach_o_lookup_command (bfd
*, bfd_mach_o_load_command_type
, bfd_mach_o_load_command
**);
868 bfd_boolean
bfd_mach_o_write_contents (bfd
*);
869 bfd_boolean
bfd_mach_o_bfd_copy_private_symbol_data (bfd
*, asymbol
*,
871 bfd_boolean
bfd_mach_o_bfd_copy_private_section_data (bfd
*, asection
*,
873 bfd_boolean
bfd_mach_o_bfd_copy_private_bfd_data (bfd
*, bfd
*);
874 long bfd_mach_o_get_symtab_upper_bound (bfd
*);
875 long bfd_mach_o_canonicalize_symtab (bfd
*, asymbol
**);
876 long bfd_mach_o_get_reloc_upper_bound (bfd
*, asection
*);
877 long bfd_mach_o_canonicalize_reloc (bfd
*, asection
*, arelent
**, asymbol
**);
878 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd
*);
879 long bfd_mach_o_canonicalize_dynamic_reloc (bfd
*, arelent
**, asymbol
**);
880 asymbol
*bfd_mach_o_make_empty_symbol (bfd
*);
881 void bfd_mach_o_get_symbol_info (bfd
*, asymbol
*, symbol_info
*);
882 void bfd_mach_o_print_symbol (bfd
*, PTR
, asymbol
*, bfd_print_symbol_type
);
883 bfd_boolean
bfd_mach_o_bfd_print_private_bfd_data (bfd
*, PTR
);
884 int bfd_mach_o_sizeof_headers (bfd
*, struct bfd_link_info
*);
885 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type
);
886 int bfd_mach_o_core_fetch_environment (bfd
*, unsigned char **, unsigned int *);
887 char *bfd_mach_o_core_file_failing_command (bfd
*);
888 int bfd_mach_o_core_file_failing_signal (bfd
*);
889 bfd_boolean
bfd_mach_o_core_file_matches_executable_p (bfd
*, bfd
*);
890 bfd
*bfd_mach_o_fat_extract (bfd
*, bfd_format
, const bfd_arch_info_type
*);
891 const bfd_target
*bfd_mach_o_header_p (bfd
*, bfd_mach_o_filetype
,
892 bfd_mach_o_cpu_type
);
893 bfd_boolean
bfd_mach_o_build_commands (bfd
*);
894 bfd_boolean
bfd_mach_o_set_section_contents (bfd
*, asection
*, const void *,
895 file_ptr
, bfd_size_type
);
896 unsigned int bfd_mach_o_version (bfd
*);
898 extern const bfd_target mach_o_fat_vec
;
900 #endif /* _BFD_MACH_O_H_ */