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_STATE_64
= 5
72 bfd_mach_o_ppc_thread_flavour
;
74 /* Defined in <mach/i386/thread_status.h> */
75 typedef enum bfd_mach_o_i386_thread_flavour
77 BFD_MACH_O_x86_THREAD_STATE32
= 1,
78 BFD_MACH_O_x86_FLOAT_STATE32
= 2,
79 BFD_MACH_O_x86_EXCEPTION_STATE32
= 3,
80 BFD_MACH_O_x86_THREAD_STATE64
= 4,
81 BFD_MACH_O_x86_FLOAT_STATE64
= 5,
82 BFD_MACH_O_x86_EXCEPTION_STATE64
= 6,
83 BFD_MACH_O_x86_THREAD_STATE
= 7,
84 BFD_MACH_O_x86_FLOAT_STATE
= 8,
85 BFD_MACH_O_x86_EXCEPTION_STATE
= 9,
86 BFD_MACH_O_x86_DEBUG_STATE32
= 10,
87 BFD_MACH_O_x86_DEBUG_STATE64
= 11,
88 BFD_MACH_O_x86_DEBUG_STATE
= 12,
89 BFD_MACH_O_THREAD_STATE_NONE
= 13
91 bfd_mach_o_i386_thread_flavour
;
93 #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
95 typedef enum bfd_mach_o_load_command_type
97 BFD_MACH_O_LC_SEGMENT
= 0x1, /* File segment to be mapped. */
98 BFD_MACH_O_LC_SYMTAB
= 0x2, /* Link-edit stab symbol table info (obsolete). */
99 BFD_MACH_O_LC_SYMSEG
= 0x3, /* Link-edit gdb symbol table info. */
100 BFD_MACH_O_LC_THREAD
= 0x4, /* Thread. */
101 BFD_MACH_O_LC_UNIXTHREAD
= 0x5, /* UNIX thread (includes a stack). */
102 BFD_MACH_O_LC_LOADFVMLIB
= 0x6, /* Load a fixed VM shared library. */
103 BFD_MACH_O_LC_IDFVMLIB
= 0x7, /* Fixed VM shared library id. */
104 BFD_MACH_O_LC_IDENT
= 0x8, /* Object identification information (obsolete). */
105 BFD_MACH_O_LC_FVMFILE
= 0x9, /* Fixed VM file inclusion. */
106 BFD_MACH_O_LC_PREPAGE
= 0xa, /* Prepage command (internal use). */
107 BFD_MACH_O_LC_DYSYMTAB
= 0xb, /* Dynamic link-edit symbol table info. */
108 BFD_MACH_O_LC_LOAD_DYLIB
= 0xc, /* Load a dynamically linked shared library. */
109 BFD_MACH_O_LC_ID_DYLIB
= 0xd, /* Dynamically linked shared lib identification. */
110 BFD_MACH_O_LC_LOAD_DYLINKER
= 0xe, /* Load a dynamic linker. */
111 BFD_MACH_O_LC_ID_DYLINKER
= 0xf, /* Dynamic linker identification. */
112 BFD_MACH_O_LC_PREBOUND_DYLIB
= 0x10, /* Modules prebound for a dynamically. */
113 BFD_MACH_O_LC_ROUTINES
= 0x11, /* Image routines. */
114 BFD_MACH_O_LC_SUB_FRAMEWORK
= 0x12, /* Sub framework. */
115 BFD_MACH_O_LC_SUB_UMBRELLA
= 0x13, /* Sub umbrella. */
116 BFD_MACH_O_LC_SUB_CLIENT
= 0x14, /* Sub client. */
117 BFD_MACH_O_LC_SUB_LIBRARY
= 0x15, /* Sub library. */
118 BFD_MACH_O_LC_TWOLEVEL_HINTS
= 0x16, /* Two-level namespace lookup hints. */
119 BFD_MACH_O_LC_PREBIND_CKSUM
= 0x17, /* Prebind checksum. */
120 /* Load a dynamically linked shared library that is allowed to be
122 BFD_MACH_O_LC_LOAD_WEAK_DYLIB
= 0x18,
123 BFD_MACH_O_LC_SEGMENT_64
= 0x19, /* 64-bit segment of this file to be
125 BFD_MACH_O_LC_ROUTINES_64
= 0x1a, /* Address of the dyld init routine
127 BFD_MACH_O_LC_UUID
= 0x1b, /* 128-bit UUID of the executable. */
128 BFD_MACH_O_LC_RPATH
= 0x1c, /* Run path addiions. */
129 BFD_MACH_O_LC_CODE_SIGNATURE
= 0x1d, /* Local of code signature. */
130 BFD_MACH_O_LC_SEGMENT_SPLIT_INFO
= 0x1e, /* Local of info to split seg. */
131 BFD_MACH_O_LC_REEXPORT_DYLIB
= 0x1f, /* Load and re-export lib. */
132 BFD_MACH_O_LC_LAZY_LOAD_DYLIB
= 0x20, /* Delay load of lib until use. */
133 BFD_MACH_O_LC_ENCRYPTION_INFO
= 0x21 /* Encrypted segment info. */
135 bfd_mach_o_load_command_type
;
137 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
139 typedef enum bfd_mach_o_cpu_type
141 BFD_MACH_O_CPU_TYPE_VAX
= 1,
142 BFD_MACH_O_CPU_TYPE_MC680x0
= 6,
143 BFD_MACH_O_CPU_TYPE_I386
= 7,
144 BFD_MACH_O_CPU_TYPE_MIPS
= 8,
145 BFD_MACH_O_CPU_TYPE_MC98000
= 10,
146 BFD_MACH_O_CPU_TYPE_HPPA
= 11,
147 BFD_MACH_O_CPU_TYPE_ARM
= 12,
148 BFD_MACH_O_CPU_TYPE_MC88000
= 13,
149 BFD_MACH_O_CPU_TYPE_SPARC
= 14,
150 BFD_MACH_O_CPU_TYPE_I860
= 15,
151 BFD_MACH_O_CPU_TYPE_ALPHA
= 16,
152 BFD_MACH_O_CPU_TYPE_POWERPC
= 18,
153 BFD_MACH_O_CPU_TYPE_POWERPC_64
= (BFD_MACH_O_CPU_TYPE_POWERPC
| BFD_MACH_O_CPU_IS64BIT
),
154 BFD_MACH_O_CPU_TYPE_X86_64
= (BFD_MACH_O_CPU_TYPE_I386
| BFD_MACH_O_CPU_IS64BIT
)
158 typedef enum bfd_mach_o_cpu_subtype
160 BFD_MACH_O_CPU_SUBTYPE_X86_ALL
= 3
162 bfd_mach_o_cpu_subtype
;
164 typedef enum bfd_mach_o_filetype
166 BFD_MACH_O_MH_OBJECT
= 1,
167 BFD_MACH_O_MH_EXECUTE
= 2,
168 BFD_MACH_O_MH_FVMLIB
= 3,
169 BFD_MACH_O_MH_CORE
= 4,
170 BFD_MACH_O_MH_PRELOAD
= 5,
171 BFD_MACH_O_MH_DYLIB
= 6,
172 BFD_MACH_O_MH_DYLINKER
= 7,
173 BFD_MACH_O_MH_BUNDLE
= 8
177 typedef enum bfd_mach_o_header_flags
179 BFD_MACH_O_MH_NOUNDEFS
= 0x000001,
180 BFD_MACH_O_MH_INCRLINK
= 0x000002,
181 BFD_MACH_O_MH_DYLDLINK
= 0x000004,
182 BFD_MACH_O_MH_BINDATLOAD
= 0x000008,
183 BFD_MACH_O_MH_PREBOUND
= 0x000010,
184 BFD_MACH_O_MH_SPLIT_SEGS
= 0x000020,
185 BFD_MACH_O_MH_LAZY_INIT
= 0x000040,
186 BFD_MACH_O_MH_TWOLEVEL
= 0x000080,
187 BFD_MACH_O_MH_FORCE_FLAT
= 0x000100,
188 BFD_MACH_O_MH_NOMULTIDEFS
= 0x000200,
189 BFD_MACH_O_MH_NOFIXPREBINDING
= 0x000400,
190 BFD_MACH_O_MH_PREBINDABLE
= 0x000800,
191 BFD_MACH_O_MH_ALLMODSBOUND
= 0x001000,
192 BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS
= 0x002000,
193 BFD_MACH_O_MH_CANONICAL
= 0x004000,
194 BFD_MACH_O_MH_WEAK_DEFINES
= 0x008000,
195 BFD_MACH_O_MH_BINDS_TO_WEAK
= 0x010000,
196 BFD_MACH_O_MH_ALLOW_STACK_EXECUTION
= 0x020000,
197 BFD_MACH_O_MH_ROOT_SAFE
= 0x040000,
198 BFD_MACH_O_MH_SETUID_SAFE
= 0x080000,
199 BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS
= 0x100000,
200 BFD_MACH_O_MH_PIE
= 0x200000
202 bfd_mach_o_header_flags
;
204 /* Constants for the type of a section. */
206 typedef enum bfd_mach_o_section_type
208 /* Regular section. */
209 BFD_MACH_O_S_REGULAR
= 0x0,
211 /* Zero fill on demand section. */
212 BFD_MACH_O_S_ZEROFILL
= 0x1,
214 /* Section with only literal C strings. */
215 BFD_MACH_O_S_CSTRING_LITERALS
= 0x2,
217 /* Section with only 4 byte literals. */
218 BFD_MACH_O_S_4BYTE_LITERALS
= 0x3,
220 /* Section with only 8 byte literals. */
221 BFD_MACH_O_S_8BYTE_LITERALS
= 0x4,
223 /* Section with only pointers to literals. */
224 BFD_MACH_O_S_LITERAL_POINTERS
= 0x5,
226 /* For the two types of symbol pointers sections and the symbol stubs
227 section they have indirect symbol table entries. For each of the
228 entries in the section the indirect symbol table entries, in
229 corresponding order in the indirect symbol table, start at the index
230 stored in the reserved1 field of the section structure. Since the
231 indirect symbol table entries correspond to the entries in the
232 section the number of indirect symbol table entries is inferred from
233 the size of the section divided by the size of the entries in the
234 section. For symbol pointers sections the size of the entries in
235 the section is 4 bytes and for symbol stubs sections the byte size
236 of the stubs is stored in the reserved2 field of the section
239 /* Section with only non-lazy symbol pointers. */
240 BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
= 0x6,
242 /* Section with only lazy symbol pointers. */
243 BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
= 0x7,
245 /* Section with only symbol stubs, byte size of stub in the reserved2
247 BFD_MACH_O_S_SYMBOL_STUBS
= 0x8,
249 /* Section with only function pointers for initialization. */
250 BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS
= 0x9,
252 /* Section with only function pointers for termination. */
253 BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS
= 0xa,
255 /* Section contains symbols that are coalesced by the linkers. */
256 BFD_MACH_O_S_COALESCED
= 0xb,
258 /* Zero fill on demand section (possibly larger than 4 GB). */
259 BFD_MACH_O_S_GB_ZEROFILL
= 0xc,
261 /* Section with only pairs of function pointers for interposing. */
262 BFD_MACH_O_S_INTERPOSING
= 0xd,
264 /* Section with only 16 byte literals. */
265 BFD_MACH_O_S_16BYTE_LITERALS
= 0xe,
267 /* Section contains DTrace Object Format. */
268 BFD_MACH_O_S_DTRACE_DOF
= 0xf,
270 /* Section with only lazy symbol pointers to lazy loaded dylibs. */
271 BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS
= 0x10
273 bfd_mach_o_section_type
;
275 /* The flags field of a section structure is separated into two parts a section
276 type and section attributes. The section types are mutually exclusive (it
277 can only have one type) but the section attributes are not (it may have more
278 than one attribute). */
280 #define BFD_MACH_O_SECTION_TYPE_MASK 0x000000ff
282 /* Constants for the section attributes part of the flags field of a section
284 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK 0xffffff00
285 /* System setable attributes. */
286 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS 0x00ffff00
287 /* User attributes. */
288 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR 0xff000000
290 typedef enum bfd_mach_o_section_attribute
292 /* Section has local relocation entries. */
293 BFD_MACH_O_S_ATTR_LOC_RELOC
= 0x00000100,
295 /* Section has external relocation entries. */
296 BFD_MACH_O_S_ATTR_EXT_RELOC
= 0x00000200,
298 /* Section contains some machine instructions. */
299 BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS
= 0x00000400,
301 /* A debug section. */
302 BFD_MACH_O_S_ATTR_DEBUG
= 0x02000000,
304 /* Used with i386 stubs. */
305 BFD_MACH_O_S_SELF_MODIFYING_CODE
= 0x04000000,
307 /* Blocks are live if they reference live blocks. */
308 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
= 0x08000000,
310 /* No dead stripping. */
311 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP
= 0x10000000,
313 /* Section symbols can be stripped in files with MH_DYLDLINK flag. */
314 BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
= 0x20000000,
316 /* Section contains coalesced symbols that are not to be in the TOC of an
318 BFD_MACH_O_S_ATTR_NO_TOC
= 0x40000000,
320 /* Section contains only true machine instructions. */
321 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
= 0x80000000
323 bfd_mach_o_section_attribute
;
325 typedef struct bfd_mach_o_header
328 unsigned long cputype
;
329 unsigned long cpusubtype
;
330 unsigned long filetype
;
332 unsigned long sizeofcmds
;
334 unsigned int reserved
;
335 /* Version 1: 32 bits, version 2: 64 bits. */
336 unsigned int version
;
337 enum bfd_endian byteorder
;
341 #define BFD_MACH_O_HEADER_SIZE 28
342 #define BFD_MACH_O_HEADER_64_SIZE 32
344 typedef struct bfd_mach_o_section
346 asection
*bfdsection
;
347 char sectname
[16 + 1];
348 char segname
[16 + 1];
354 unsigned long nreloc
;
356 unsigned long reserved1
;
357 unsigned long reserved2
;
358 unsigned long reserved3
;
361 #define BFD_MACH_O_SECTION_SIZE 68
362 #define BFD_MACH_O_SECTION_64_SIZE 80
364 typedef struct bfd_mach_o_segment_command
366 char segname
[16 + 1];
370 unsigned long filesize
;
371 unsigned long maxprot
; /* Maximum permitted protection. */
372 unsigned long initprot
; /* Initial protection. */
373 unsigned long nsects
;
375 bfd_mach_o_section
*sections
;
378 bfd_mach_o_segment_command
;
379 #define BFD_MACH_O_LC_SEGMENT_SIZE 56
380 #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72
382 /* Protection flags. */
383 #define BFD_MACH_O_PROT_READ 0x01
384 #define BFD_MACH_O_PROT_WRITE 0x02
385 #define BFD_MACH_O_PROT_EXECUTE 0x04
387 /* Generic relocation types (used by i386). */
388 #define BFD_MACH_O_GENERIC_RELOC_VANILLA 0
389 #define BFD_MACH_O_GENERIC_RELOC_PAIR 1
390 #define BFD_MACH_O_GENERIC_RELOC_SECTDIFF 2
391 #define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR 3
392 #define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
394 /* Size of a relocation entry. */
395 #define BFD_MACH_O_RELENT_SIZE 8
397 /* Fields for a normal (non-scattered) entry. */
398 #define BFD_MACH_O_R_PCREL 0x01000000
399 #define BFD_MACH_O_GET_R_LENGTH(s) (((s) >> 25) & 0x3)
400 #define BFD_MACH_O_R_EXTERN 0x08000000
401 #define BFD_MACH_O_GET_R_TYPE(s) (((s) >> 28) & 0x0f)
402 #define BFD_MACH_O_GET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
403 #define BFD_MACH_O_SET_R_LENGTH(l) (((l) & 0x3) << 25)
404 #define BFD_MACH_O_SET_R_TYPE(t) (((t) & 0xf) << 28)
405 #define BFD_MACH_O_SET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
407 /* Fields for a scattered entry. */
408 #define BFD_MACH_O_SR_SCATTERED 0x80000000
409 #define BFD_MACH_O_SR_PCREL 0x40000000
410 #define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3)
411 #define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f)
412 #define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff)
413 #define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28)
414 #define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24)
415 #define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff)
417 /* Expanded internal representation of a relocation entry. */
418 typedef struct bfd_mach_o_reloc_info
422 unsigned int r_scattered
: 1;
423 unsigned int r_type
: 4;
424 unsigned int r_pcrel
: 1;
425 unsigned int r_length
: 2;
426 unsigned int r_extern
: 1;
428 bfd_mach_o_reloc_info
;
430 typedef struct bfd_mach_o_asymbol
432 /* The actual symbol which the rest of BFD works with. */
435 /* Fields from Mach-O symbol. */
436 unsigned char n_type
;
437 unsigned char n_sect
;
438 unsigned short n_desc
;
441 #define BFD_MACH_O_NLIST_SIZE 12
442 #define BFD_MACH_O_NLIST_64_SIZE 16
444 typedef struct bfd_mach_o_symtab_command
449 unsigned int strsize
;
450 bfd_mach_o_asymbol
*symbols
;
453 bfd_mach_o_symtab_command
;
455 /* This is the second set of the symbolic information which is used to support
456 the data structures for the dynamically link editor.
458 The original set of symbolic information in the symtab_command which contains
459 the symbol and string tables must also be present when this load command is
460 present. When this load command is present the symbol table is organized
461 into three groups of symbols:
462 local symbols (static and debugging symbols) - grouped by module
463 defined external symbols - grouped by module (sorted by name if not lib)
464 undefined external symbols (sorted by name)
465 In this load command there are offsets and counts to each of the three groups
468 This load command contains a the offsets and sizes of the following new
469 symbolic information tables:
472 reference symbol table
473 indirect symbol table
474 The first three tables above (the table of contents, module table and
475 reference symbol table) are only present if the file is a dynamically linked
476 shared library. For executable and object modules, which are files
477 containing only one module, the information that would be in these three
478 tables is determined as follows:
479 table of contents - the defined external symbols are sorted by name
480 module table - the file contains only one module so everything in the
481 file is part of the module.
482 reference symbol table - is the defined and undefined external symbols
484 For dynamically linked shared library files this load command also contains
485 offsets and sizes to the pool of relocation entries for all sections
486 separated into two groups:
487 external relocation entries
488 local relocation entries
489 For executable and object modules the relocation entries continue to hang
490 off the section structures. */
492 typedef struct bfd_mach_o_dylib_module
494 /* Index into the string table indicating the name of the module. */
495 unsigned long module_name_idx
;
498 /* Index into the symbol table of the first defined external symbol provided
500 unsigned long iextdefsym
;
502 /* Number of external symbols provided by this module. */
503 unsigned long nextdefsym
;
505 /* Index into the external reference table of the first entry
506 provided by this module. */
507 unsigned long irefsym
;
509 /* Number of external reference entries provided by this module. */
510 unsigned long nrefsym
;
512 /* Index into the symbol table of the first local symbol provided by this
514 unsigned long ilocalsym
;
516 /* Number of local symbols provided by this module. */
517 unsigned long nlocalsym
;
519 /* Index into the external relocation table of the first entry provided
521 unsigned long iextrel
;
523 /* Number of external relocation entries provided by this module. */
524 unsigned long nextrel
;
526 /* Index in the module initialization section to the pointers for this
528 unsigned short iinit
;
530 /* Index in the module termination section to the pointers for this
532 unsigned short iterm
;
534 /* Number of pointers in the module initialization for this module. */
535 unsigned short ninit
;
537 /* Number of pointers in the module termination for this module. */
538 unsigned short nterm
;
540 /* Number of data byte for this module that are used in the __module_info
541 section of the __OBJC segment. */
542 unsigned long objc_module_info_size
;
544 /* Statically linked address of the start of the data for this module
545 in the __module_info section of the __OBJC_segment. */
546 bfd_vma objc_module_info_addr
;
548 bfd_mach_o_dylib_module
;
549 #define BFD_MACH_O_DYLIB_MODULE_SIZE 52
550 #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
552 typedef struct bfd_mach_o_dylib_table_of_content
554 /* Index into the symbol table to the defined external symbol. */
555 unsigned long symbol_index
;
557 /* Index into the module table to the module for this entry. */
558 unsigned long module_index
;
560 bfd_mach_o_dylib_table_of_content
;
561 #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
563 typedef struct bfd_mach_o_dylib_reference
565 /* Index into the symbol table for the symbol being referenced. */
568 /* Type of the reference being made (use REFERENCE_FLAGS constants). */
571 bfd_mach_o_dylib_reference
;
572 #define BFD_MACH_O_REFERENCE_SIZE 4
574 typedef struct bfd_mach_o_dysymtab_command
576 /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
577 are grouped into the following three groups:
578 local symbols (further grouped by the module they are from)
579 defined external symbols (further grouped by the module they are from)
582 The local symbols are used only for debugging. The dynamic binding
583 process may have to use them to indicate to the debugger the local
584 symbols for a module that is being bound.
586 The last two groups are used by the dynamic binding process to do the
587 binding (indirectly through the module table and the reference symbol
588 table when this is a dynamically linked shared library file). */
590 unsigned long ilocalsym
; /* Index to local symbols. */
591 unsigned long nlocalsym
; /* Number of local symbols. */
592 unsigned long iextdefsym
; /* Index to externally defined symbols. */
593 unsigned long nextdefsym
; /* Number of externally defined symbols. */
594 unsigned long iundefsym
; /* Index to undefined symbols. */
595 unsigned long nundefsym
; /* Number of undefined symbols. */
597 /* For the for the dynamic binding process to find which module a symbol
598 is defined in the table of contents is used (analogous to the ranlib
599 structure in an archive) which maps defined external symbols to modules
600 they are defined in. This exists only in a dynamically linked shared
601 library file. For executable and object modules the defined external
602 symbols are sorted by name and is use as the table of contents. */
604 unsigned long tocoff
; /* File offset to table of contents. */
605 unsigned long ntoc
; /* Number of entries in table of contents. */
607 /* To support dynamic binding of "modules" (whole object files) the symbol
608 table must reflect the modules that the file was created from. This is
609 done by having a module table that has indexes and counts into the merged
610 tables for each module. The module structure that these two entries
611 refer to is described below. This exists only in a dynamically linked
612 shared library file. For executable and object modules the file only
613 contains one module so everything in the file belongs to the module. */
615 unsigned long modtaboff
; /* File offset to module table. */
616 unsigned long nmodtab
; /* Number of module table entries. */
618 /* To support dynamic module binding the module structure for each module
619 indicates the external references (defined and undefined) each module
620 makes. For each module there is an offset and a count into the
621 reference symbol table for the symbols that the module references.
622 This exists only in a dynamically linked shared library file. For
623 executable and object modules the defined external symbols and the
624 undefined external symbols indicates the external references. */
626 unsigned long extrefsymoff
; /* Offset to referenced symbol table. */
627 unsigned long nextrefsyms
; /* Number of referenced symbol table entries. */
629 /* The sections that contain "symbol pointers" and "routine stubs" have
630 indexes and (implied counts based on the size of the section and fixed
631 size of the entry) into the "indirect symbol" table for each pointer
632 and stub. For every section of these two types the index into the
633 indirect symbol table is stored in the section header in the field
634 reserved1. An indirect symbol table entry is simply a 32bit index into
635 the symbol table to the symbol that the pointer or stub is referring to.
636 The indirect symbol table is ordered to match the entries in the section. */
638 unsigned long indirectsymoff
; /* File offset to the indirect symbol table. */
639 unsigned long nindirectsyms
; /* Number of indirect symbol table entries. */
641 /* To support relocating an individual module in a library file quickly the
642 external relocation entries for each module in the library need to be
643 accessed efficiently. Since the relocation entries can't be accessed
644 through the section headers for a library file they are separated into
645 groups of local and external entries further grouped by module. In this
646 case the presents of this load command who's extreloff, nextrel,
647 locreloff and nlocrel fields are non-zero indicates that the relocation
648 entries of non-merged sections are not referenced through the section
649 structures (and the reloff and nreloc fields in the section headers are
652 Since the relocation entries are not accessed through the section headers
653 this requires the r_address field to be something other than a section
654 offset to identify the item to be relocated. In this case r_address is
655 set to the offset from the vmaddr of the first LC_SEGMENT command.
657 The relocation entries are grouped by module and the module table
658 entries have indexes and counts into them for the group of external
659 relocation entries for that the module.
661 For sections that are merged across modules there must not be any
662 remaining external relocation entries for them (for merged sections
663 remaining relocation entries must be local). */
665 unsigned long extreloff
; /* Offset to external relocation entries. */
666 unsigned long nextrel
; /* Number of external relocation entries. */
668 /* All the local relocation entries are grouped together (they are not
669 grouped by their module since they are only used if the object is moved
670 from it statically link edited address). */
672 unsigned long locreloff
; /* Offset to local relocation entries. */
673 unsigned long nlocrel
; /* Number of local relocation entries. */
675 bfd_mach_o_dylib_module
*dylib_module
;
676 bfd_mach_o_dylib_table_of_content
*dylib_toc
;
677 unsigned int *indirect_syms
;
678 bfd_mach_o_dylib_reference
*ext_refs
;
680 bfd_mach_o_dysymtab_command
;
682 /* An indirect symbol table entry is simply a 32bit index into the symbol table
683 to the symbol that the pointer or stub is refering to. Unless it is for a
684 non-lazy symbol pointer section for a defined symbol which strip(1) has
685 removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the
686 symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */
688 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
689 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS 0x40000000
690 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE 4
692 typedef struct bfd_mach_o_thread_flavour
694 unsigned long flavour
;
698 bfd_mach_o_thread_flavour
;
700 typedef struct bfd_mach_o_thread_command
702 unsigned long nflavours
;
703 bfd_mach_o_thread_flavour
*flavours
;
706 bfd_mach_o_thread_command
;
708 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER. */
710 typedef struct bfd_mach_o_dylinker_command
712 unsigned long name_offset
; /* Offset to library's path name. */
713 unsigned long name_len
; /* Offset to library's path name. */
716 bfd_mach_o_dylinker_command
;
718 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
719 or LC_REEXPORT_DYLIB. */
721 typedef struct bfd_mach_o_dylib_command
723 unsigned long name_offset
; /* Offset to library's path name. */
724 unsigned long name_len
; /* Offset to library's path name. */
725 unsigned long timestamp
; /* Library's build time stamp. */
726 unsigned long current_version
; /* Library's current version number. */
727 unsigned long compatibility_version
; /* Library's compatibility vers number. */
730 bfd_mach_o_dylib_command
;
732 /* For LC_PREBOUND_DYLIB. */
734 typedef struct bfd_mach_o_prebound_dylib_command
736 unsigned long name
; /* Library's path name. */
737 unsigned long nmodules
; /* Number of modules in library. */
738 unsigned long linked_modules
; /* Bit vector of linked modules. */
741 bfd_mach_o_prebound_dylib_command
;
745 typedef struct bfd_mach_o_uuid_command
747 unsigned char uuid
[16];
750 bfd_mach_o_uuid_command
;
752 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO. */
754 typedef struct bfd_mach_o_linkedit_command
756 unsigned long dataoff
;
757 unsigned long datasize
;
759 bfd_mach_o_linkedit_command
;
761 typedef struct bfd_mach_o_str_command
763 unsigned long stroff
;
764 unsigned long str_len
;
767 bfd_mach_o_str_command
;
769 typedef struct bfd_mach_o_load_command
771 bfd_mach_o_load_command_type type
;
772 bfd_boolean type_required
;
777 bfd_mach_o_segment_command segment
;
778 bfd_mach_o_symtab_command symtab
;
779 bfd_mach_o_dysymtab_command dysymtab
;
780 bfd_mach_o_thread_command thread
;
781 bfd_mach_o_dylib_command dylib
;
782 bfd_mach_o_dylinker_command dylinker
;
783 bfd_mach_o_prebound_dylib_command prebound_dylib
;
784 bfd_mach_o_uuid_command uuid
;
785 bfd_mach_o_linkedit_command linkedit
;
786 bfd_mach_o_str_command str
;
790 bfd_mach_o_load_command
;
792 typedef struct mach_o_data_struct
795 bfd_mach_o_header header
;
796 /* Array of load commands (length is given by header.ncmds). */
797 bfd_mach_o_load_command
*commands
;
799 /* Flatten array of sections. The array is 0-based. */
800 unsigned long nsects
;
801 bfd_mach_o_section
**sections
;
803 /* Used while writting: current length of the output file. This is used
804 to allocate space in the file. */
807 /* As symtab is referenced by other load command, it is handy to have
808 a direct access to it. Also it is not clearly stated, only one symtab
810 bfd_mach_o_symtab_command
*symtab
;
812 bfd_mach_o_data_struct
;
814 /* Target specific routines. */
815 typedef struct bfd_mach_o_backend_data
817 bfd_boolean (*_bfd_mach_o_swap_reloc_in
)(arelent
*, bfd_mach_o_reloc_info
*);
818 bfd_boolean (*_bfd_mach_o_swap_reloc_out
)(arelent
*, bfd_mach_o_reloc_info
*);
820 bfd_mach_o_backend_data
;
822 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
823 #define bfd_mach_o_get_backend_data(abfd) \
824 ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
826 bfd_boolean
bfd_mach_o_valid (bfd
*);
827 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);
828 int bfd_mach_o_scan_start_address (bfd
*);
829 int bfd_mach_o_scan (bfd
*, bfd_mach_o_header
*, bfd_mach_o_data_struct
*);
830 bfd_boolean
bfd_mach_o_mkobject_init (bfd
*);
831 const bfd_target
*bfd_mach_o_object_p (bfd
*);
832 const bfd_target
*bfd_mach_o_core_p (bfd
*);
833 const bfd_target
*bfd_mach_o_archive_p (bfd
*);
834 bfd
*bfd_mach_o_openr_next_archived_file (bfd
*, bfd
*);
835 int bfd_mach_o_lookup_section (bfd
*, asection
*, bfd_mach_o_load_command
**, bfd_mach_o_section
**);
836 int bfd_mach_o_lookup_command (bfd
*, bfd_mach_o_load_command_type
, bfd_mach_o_load_command
**);
837 bfd_boolean
bfd_mach_o_write_contents (bfd
*);
838 bfd_boolean
bfd_mach_o_bfd_copy_private_symbol_data (bfd
*, asymbol
*,
840 bfd_boolean
bfd_mach_o_bfd_copy_private_section_data (bfd
*, asection
*,
842 bfd_boolean
bfd_mach_o_bfd_copy_private_bfd_data (bfd
*, bfd
*);
843 long bfd_mach_o_get_symtab_upper_bound (bfd
*);
844 long bfd_mach_o_canonicalize_symtab (bfd
*, asymbol
**);
845 long bfd_mach_o_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
847 long bfd_mach_o_canonicalize_reloc (bfd
*abfd
, asection
*asect
,
848 arelent
**rels
, asymbol
**syms
);
849 asymbol
*bfd_mach_o_make_empty_symbol (bfd
*);
850 void bfd_mach_o_get_symbol_info (bfd
*, asymbol
*, symbol_info
*);
851 void bfd_mach_o_print_symbol (bfd
*, PTR
, asymbol
*, bfd_print_symbol_type
);
852 bfd_boolean
bfd_mach_o_bfd_print_private_bfd_data (bfd
*, PTR
);
853 int bfd_mach_o_sizeof_headers (bfd
*, struct bfd_link_info
*);
854 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type
);
855 int bfd_mach_o_core_fetch_environment (bfd
*, unsigned char **, unsigned int *);
856 char *bfd_mach_o_core_file_failing_command (bfd
*);
857 int bfd_mach_o_core_file_failing_signal (bfd
*);
858 bfd_boolean
bfd_mach_o_core_file_matches_executable_p (bfd
*, bfd
*);
859 bfd
*bfd_mach_o_fat_extract (bfd
*, bfd_format
, const bfd_arch_info_type
*);
860 const bfd_target
*bfd_mach_o_header_p (bfd
*, bfd_mach_o_filetype
,
861 bfd_mach_o_cpu_type
);
862 bfd_boolean
bfd_mach_o_build_commands (bfd
*abfd
);
863 bfd_boolean
bfd_mach_o_set_section_contents (bfd
*, asection
*, const void *,
864 file_ptr
, bfd_size_type
);
865 unsigned int bfd_mach_o_version (bfd
*);
867 extern const bfd_target mach_o_fat_vec
;
869 #endif /* _BFD_MACH_O_H_ */