| 1 | /* Mach-O support for BFD. |
| 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008 |
| 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 _BFD_MACH_O_H_ |
| 23 | #define _BFD_MACH_O_H_ |
| 24 | |
| 25 | #include "bfd.h" |
| 26 | |
| 27 | #define BFD_MACH_O_N_STAB 0xe0 /* If any of these bits set, a symbolic debugging entry. */ |
| 28 | #define BFD_MACH_O_N_PEXT 0x10 /* Private external symbol bit. */ |
| 29 | #define BFD_MACH_O_N_TYPE 0x0e /* Mask for the type bits. */ |
| 30 | #define BFD_MACH_O_N_EXT 0x01 /* External symbol bit, set for external symbols. */ |
| 31 | #define BFD_MACH_O_N_UNDF 0x00 /* Undefined, n_sect == NO_SECT. */ |
| 32 | #define BFD_MACH_O_N_ABS 0x02 /* Absolute, n_sect == NO_SECT. */ |
| 33 | #define BFD_MACH_O_N_INDR 0x0a /* Indirect. */ |
| 34 | #define BFD_MACH_O_N_PBUD 0x0c /* Prebound undefined (defined in a dylib). */ |
| 35 | #define BFD_MACH_O_N_SECT 0x0e /* Defined in section number n_sect. */ |
| 36 | |
| 37 | #define BFD_MACH_O_NO_SECT 0 |
| 38 | |
| 39 | #define BFD_MACH_O_SYM_NTYPE(SYM) (((SYM)->udata.i >> 24) & 0xff) |
| 40 | #define BFD_MACH_O_SYM_NSECT(SYM) (((SYM)->udata.i >> 16) & 0xff) |
| 41 | #define BFD_MACH_O_SYM_NDESC(SYM) ((SYM)->udata.i & 0xffff) |
| 42 | |
| 43 | typedef enum bfd_mach_o_ppc_thread_flavour |
| 44 | { |
| 45 | BFD_MACH_O_PPC_THREAD_STATE = 1, |
| 46 | BFD_MACH_O_PPC_FLOAT_STATE = 2, |
| 47 | BFD_MACH_O_PPC_EXCEPTION_STATE = 3, |
| 48 | BFD_MACH_O_PPC_VECTOR_STATE = 4, |
| 49 | BFD_MACH_O_PPC_THREAD_STATE_64 = 5 |
| 50 | } |
| 51 | bfd_mach_o_ppc_thread_flavour; |
| 52 | |
| 53 | /* Defined in <mach/i386/thread_status.h> */ |
| 54 | typedef enum bfd_mach_o_i386_thread_flavour |
| 55 | { |
| 56 | BFD_MACH_O_x86_THREAD_STATE32 = 1, |
| 57 | BFD_MACH_O_x86_FLOAT_STATE32 = 2, |
| 58 | BFD_MACH_O_x86_EXCEPTION_STATE32 = 3, |
| 59 | BFD_MACH_O_x86_THREAD_STATE64 = 4, |
| 60 | BFD_MACH_O_x86_FLOAT_STATE64 = 5, |
| 61 | BFD_MACH_O_x86_EXCEPTION_STATE64 = 6, |
| 62 | BFD_MACH_O_x86_THREAD_STATE = 7, |
| 63 | BFD_MACH_O_x86_FLOAT_STATE = 8, |
| 64 | BFD_MACH_O_x86_EXCEPTION_STATE = 9, |
| 65 | BFD_MACH_O_x86_DEBUG_STATE32 = 10, |
| 66 | BFD_MACH_O_x86_DEBUG_STATE64 = 11, |
| 67 | BFD_MACH_O_x86_DEBUG_STATE = 12, |
| 68 | BFD_MACH_O_THREAD_STATE_NONE = 13 |
| 69 | } |
| 70 | bfd_mach_o_i386_thread_flavour; |
| 71 | |
| 72 | #define BFD_MACH_O_LC_REQ_DYLD 0x80000000 |
| 73 | |
| 74 | typedef enum bfd_mach_o_load_command_type |
| 75 | { |
| 76 | BFD_MACH_O_LC_SEGMENT = 0x1, /* File segment to be mapped. */ |
| 77 | BFD_MACH_O_LC_SYMTAB = 0x2, /* Link-edit stab symbol table info (obsolete). */ |
| 78 | BFD_MACH_O_LC_SYMSEG = 0x3, /* Link-edit gdb symbol table info. */ |
| 79 | BFD_MACH_O_LC_THREAD = 0x4, /* Thread. */ |
| 80 | BFD_MACH_O_LC_UNIXTHREAD = 0x5, /* UNIX thread (includes a stack). */ |
| 81 | BFD_MACH_O_LC_LOADFVMLIB = 0x6, /* Load a fixed VM shared library. */ |
| 82 | BFD_MACH_O_LC_IDFVMLIB = 0x7, /* Fixed VM shared library id. */ |
| 83 | BFD_MACH_O_LC_IDENT = 0x8, /* Object identification information (obsolete). */ |
| 84 | BFD_MACH_O_LC_FVMFILE = 0x9, /* Fixed VM file inclusion. */ |
| 85 | BFD_MACH_O_LC_PREPAGE = 0xa, /* Prepage command (internal use). */ |
| 86 | BFD_MACH_O_LC_DYSYMTAB = 0xb, /* Dynamic link-edit symbol table info. */ |
| 87 | BFD_MACH_O_LC_LOAD_DYLIB = 0xc, /* Load a dynamically linked shared library. */ |
| 88 | BFD_MACH_O_LC_ID_DYLIB = 0xd, /* Dynamically linked shared lib identification. */ |
| 89 | BFD_MACH_O_LC_LOAD_DYLINKER = 0xe, /* Load a dynamic linker. */ |
| 90 | BFD_MACH_O_LC_ID_DYLINKER = 0xf, /* Dynamic linker identification. */ |
| 91 | BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10, /* Modules prebound for a dynamically. */ |
| 92 | BFD_MACH_O_LC_ROUTINES = 0x11, /* Image routines. */ |
| 93 | BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12, /* Sub framework. */ |
| 94 | BFD_MACH_O_LC_SUB_UMBRELLA = 0x13, /* Sub umbrella. */ |
| 95 | BFD_MACH_O_LC_SUB_CLIENT = 0x14, /* Sub client. */ |
| 96 | BFD_MACH_O_LC_SUB_LIBRARY = 0x15, /* Sub library. */ |
| 97 | BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16, /* Two-level namespace lookup hints. */ |
| 98 | BFD_MACH_O_LC_PREBIND_CKSUM = 0x17, /* Prebind checksum. */ |
| 99 | /* Load a dynamically linked shared library that is allowed to be |
| 100 | missing (weak). */ |
| 101 | BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18, |
| 102 | BFD_MACH_O_LC_SEGMENT_64 = 0x19, /* 64-bit segment of this file to be |
| 103 | mapped. */ |
| 104 | BFD_MACH_O_LC_ROUTINES_64 = 0x1a, /* Address of the dyld init routine |
| 105 | in a dylib. */ |
| 106 | BFD_MACH_O_LC_UUID = 0x1b, /* 128-bit UUID of the executable. */ |
| 107 | BFD_MACH_O_LC_RPATH = 0x1c, /* Run path addiions. */ |
| 108 | BFD_MACH_O_LC_CODE_SIGNATURE = 0x1d, /* Local of code signature. */ |
| 109 | BFD_MACH_O_LC_SEGMENT_SPLIT_INFO = 0x1e, /* Local of info to split seg. */ |
| 110 | BFD_MACH_O_LC_REEXPORT_DYLIB = 0x1f, /* Load and re-export lib. */ |
| 111 | BFD_MACH_O_LC_LAZY_LOAD_DYLIB = 0x20, /* Delay load of lib until use. */ |
| 112 | BFD_MACH_O_LC_ENCRYPTION_INFO = 0x21 /* Encrypted segment info. */ |
| 113 | } |
| 114 | bfd_mach_o_load_command_type; |
| 115 | |
| 116 | #define BFD_MACH_O_CPU_IS64BIT 0x1000000 |
| 117 | |
| 118 | typedef enum bfd_mach_o_cpu_type |
| 119 | { |
| 120 | BFD_MACH_O_CPU_TYPE_VAX = 1, |
| 121 | BFD_MACH_O_CPU_TYPE_MC680x0 = 6, |
| 122 | BFD_MACH_O_CPU_TYPE_I386 = 7, |
| 123 | BFD_MACH_O_CPU_TYPE_MIPS = 8, |
| 124 | BFD_MACH_O_CPU_TYPE_MC98000 = 10, |
| 125 | BFD_MACH_O_CPU_TYPE_HPPA = 11, |
| 126 | BFD_MACH_O_CPU_TYPE_ARM = 12, |
| 127 | BFD_MACH_O_CPU_TYPE_MC88000 = 13, |
| 128 | BFD_MACH_O_CPU_TYPE_SPARC = 14, |
| 129 | BFD_MACH_O_CPU_TYPE_I860 = 15, |
| 130 | BFD_MACH_O_CPU_TYPE_ALPHA = 16, |
| 131 | BFD_MACH_O_CPU_TYPE_POWERPC = 18, |
| 132 | BFD_MACH_O_CPU_TYPE_POWERPC_64 = (BFD_MACH_O_CPU_TYPE_POWERPC | BFD_MACH_O_CPU_IS64BIT), |
| 133 | BFD_MACH_O_CPU_TYPE_X86_64 = (BFD_MACH_O_CPU_TYPE_I386 | BFD_MACH_O_CPU_IS64BIT) |
| 134 | } |
| 135 | bfd_mach_o_cpu_type; |
| 136 | |
| 137 | typedef enum bfd_mach_o_filetype |
| 138 | { |
| 139 | BFD_MACH_O_MH_OBJECT = 1, |
| 140 | BFD_MACH_O_MH_EXECUTE = 2, |
| 141 | BFD_MACH_O_MH_FVMLIB = 3, |
| 142 | BFD_MACH_O_MH_CORE = 4, |
| 143 | BFD_MACH_O_MH_PRELOAD = 5, |
| 144 | BFD_MACH_O_MH_DYLIB = 6, |
| 145 | BFD_MACH_O_MH_DYLINKER = 7, |
| 146 | BFD_MACH_O_MH_BUNDLE = 8 |
| 147 | } |
| 148 | bfd_mach_o_filetype; |
| 149 | |
| 150 | /* Constants for the type of a section. */ |
| 151 | |
| 152 | typedef enum bfd_mach_o_section_type |
| 153 | { |
| 154 | /* Regular section. */ |
| 155 | BFD_MACH_O_S_REGULAR = 0x0, |
| 156 | |
| 157 | /* Zero fill on demand section. */ |
| 158 | BFD_MACH_O_S_ZEROFILL = 0x1, |
| 159 | |
| 160 | /* Section with only literal C strings. */ |
| 161 | BFD_MACH_O_S_CSTRING_LITERALS = 0x2, |
| 162 | |
| 163 | /* Section with only 4 byte literals. */ |
| 164 | BFD_MACH_O_S_4BYTE_LITERALS = 0x3, |
| 165 | |
| 166 | /* Section with only 8 byte literals. */ |
| 167 | BFD_MACH_O_S_8BYTE_LITERALS = 0x4, |
| 168 | |
| 169 | /* Section with only pointers to literals. */ |
| 170 | BFD_MACH_O_S_LITERAL_POINTERS = 0x5, |
| 171 | |
| 172 | /* For the two types of symbol pointers sections and the symbol stubs |
| 173 | section they have indirect symbol table entries. For each of the |
| 174 | entries in the section the indirect symbol table entries, in |
| 175 | corresponding order in the indirect symbol table, start at the index |
| 176 | stored in the reserved1 field of the section structure. Since the |
| 177 | indirect symbol table entries correspond to the entries in the |
| 178 | section the number of indirect symbol table entries is inferred from |
| 179 | the size of the section divided by the size of the entries in the |
| 180 | section. For symbol pointers sections the size of the entries in |
| 181 | the section is 4 bytes and for symbol stubs sections the byte size |
| 182 | of the stubs is stored in the reserved2 field of the section |
| 183 | structure. */ |
| 184 | |
| 185 | /* Section with only non-lazy symbol pointers. */ |
| 186 | BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6, |
| 187 | |
| 188 | /* Section with only lazy symbol pointers. */ |
| 189 | BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7, |
| 190 | |
| 191 | /* Section with only symbol stubs, byte size of stub in the reserved2 field. */ |
| 192 | BFD_MACH_O_S_SYMBOL_STUBS = 0x8, |
| 193 | |
| 194 | /* Section with only function pointers for initialization. */ |
| 195 | BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9 |
| 196 | } |
| 197 | bfd_mach_o_section_type; |
| 198 | |
| 199 | /* The flags field of a section structure is separated into two parts a section |
| 200 | type and section attributes. The section types are mutually exclusive (it |
| 201 | can only have one type) but the section attributes are not (it may have more |
| 202 | than one attribute). */ |
| 203 | |
| 204 | #define BFD_MACH_O_SECTION_TYPE_MASK 0x000000ff |
| 205 | |
| 206 | /* Constants for the section attributes part of the flags field of a section |
| 207 | structure. */ |
| 208 | #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK 0xffffff00 |
| 209 | /* System setable attributes. */ |
| 210 | #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS 0x00ffff00 |
| 211 | /* User attributes. */ |
| 212 | #define BFD_MACH_O_SECTION_ATTRIBUTES_USR 0xff000000 |
| 213 | |
| 214 | /* Section has local relocation entries. */ |
| 215 | #define BFD_MACH_O_S_ATTR_LOC_RELOC 0x00000100 |
| 216 | |
| 217 | /* Section has external relocation entries. */ |
| 218 | #define BFD_MACH_O_S_ATTR_EXT_RELOC 0x00000200 |
| 219 | |
| 220 | /* Section contains some machine instructions. */ |
| 221 | #define BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 0x00004000 |
| 222 | |
| 223 | #define BFD_MACH_O_S_ATTR_DEBUG 0x02000000 |
| 224 | |
| 225 | /* Section contains only true machine instructions. */ |
| 226 | #define BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS 0x80000000 |
| 227 | |
| 228 | typedef unsigned long bfd_mach_o_cpu_subtype; |
| 229 | |
| 230 | typedef struct bfd_mach_o_header |
| 231 | { |
| 232 | unsigned long magic; |
| 233 | unsigned long cputype; |
| 234 | unsigned long cpusubtype; |
| 235 | unsigned long filetype; |
| 236 | unsigned long ncmds; |
| 237 | unsigned long sizeofcmds; |
| 238 | unsigned long flags; |
| 239 | unsigned int reserved; |
| 240 | /* Version 1: 32 bits, version 2: 64 bits. */ |
| 241 | unsigned int version; |
| 242 | enum bfd_endian byteorder; |
| 243 | } |
| 244 | bfd_mach_o_header; |
| 245 | |
| 246 | typedef struct bfd_mach_o_section |
| 247 | { |
| 248 | asection *bfdsection; |
| 249 | char sectname[16 + 1]; |
| 250 | char segname[16 + 1]; |
| 251 | bfd_vma addr; |
| 252 | bfd_vma size; |
| 253 | bfd_vma offset; |
| 254 | unsigned long align; |
| 255 | bfd_vma reloff; |
| 256 | unsigned long nreloc; |
| 257 | unsigned long flags; |
| 258 | unsigned long reserved1; |
| 259 | unsigned long reserved2; |
| 260 | unsigned long reserved3; |
| 261 | } |
| 262 | bfd_mach_o_section; |
| 263 | |
| 264 | typedef struct bfd_mach_o_segment_command |
| 265 | { |
| 266 | char segname[16 + 1]; |
| 267 | bfd_vma vmaddr; |
| 268 | bfd_vma vmsize; |
| 269 | bfd_vma fileoff; |
| 270 | unsigned long filesize; |
| 271 | unsigned long maxprot; /* Maximum permitted protection. */ |
| 272 | unsigned long initprot; /* Initial protection. */ |
| 273 | unsigned long nsects; |
| 274 | unsigned long flags; |
| 275 | bfd_mach_o_section *sections; |
| 276 | asection *segment; |
| 277 | } |
| 278 | bfd_mach_o_segment_command; |
| 279 | |
| 280 | /* Protection flags. */ |
| 281 | #define BFD_MACH_O_PROT_READ 0x01 |
| 282 | #define BFD_MACH_O_PROT_WRITE 0x02 |
| 283 | #define BFD_MACH_O_PROT_EXECUTE 0x04 |
| 284 | |
| 285 | typedef struct bfd_mach_o_symtab_command |
| 286 | { |
| 287 | unsigned long symoff; |
| 288 | unsigned long nsyms; |
| 289 | unsigned long stroff; |
| 290 | unsigned long strsize; |
| 291 | asymbol *symbols; |
| 292 | char *strtab; |
| 293 | asection *stabs_segment; |
| 294 | asection *stabstr_segment; |
| 295 | } |
| 296 | bfd_mach_o_symtab_command; |
| 297 | |
| 298 | /* This is the second set of the symbolic information which is used to support |
| 299 | the data structures for the dynamically link editor. |
| 300 | |
| 301 | The original set of symbolic information in the symtab_command which contains |
| 302 | the symbol and string tables must also be present when this load command is |
| 303 | present. When this load command is present the symbol table is organized |
| 304 | into three groups of symbols: |
| 305 | local symbols (static and debugging symbols) - grouped by module |
| 306 | defined external symbols - grouped by module (sorted by name if not lib) |
| 307 | undefined external symbols (sorted by name) |
| 308 | In this load command there are offsets and counts to each of the three groups |
| 309 | of symbols. |
| 310 | |
| 311 | This load command contains a the offsets and sizes of the following new |
| 312 | symbolic information tables: |
| 313 | table of contents |
| 314 | module table |
| 315 | reference symbol table |
| 316 | indirect symbol table |
| 317 | The first three tables above (the table of contents, module table and |
| 318 | reference symbol table) are only present if the file is a dynamically linked |
| 319 | shared library. For executable and object modules, which are files |
| 320 | containing only one module, the information that would be in these three |
| 321 | tables is determined as follows: |
| 322 | table of contents - the defined external symbols are sorted by name |
| 323 | module table - the file contains only one module so everything in the |
| 324 | file is part of the module. |
| 325 | reference symbol table - is the defined and undefined external symbols |
| 326 | |
| 327 | For dynamically linked shared library files this load command also contains |
| 328 | offsets and sizes to the pool of relocation entries for all sections |
| 329 | separated into two groups: |
| 330 | external relocation entries |
| 331 | local relocation entries |
| 332 | For executable and object modules the relocation entries continue to hang |
| 333 | off the section structures. */ |
| 334 | |
| 335 | typedef struct bfd_mach_o_dysymtab_command |
| 336 | { |
| 337 | /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command |
| 338 | are grouped into the following three groups: |
| 339 | local symbols (further grouped by the module they are from) |
| 340 | defined external symbols (further grouped by the module they are from) |
| 341 | undefined symbols |
| 342 | |
| 343 | The local symbols are used only for debugging. The dynamic binding |
| 344 | process may have to use them to indicate to the debugger the local |
| 345 | symbols for a module that is being bound. |
| 346 | |
| 347 | The last two groups are used by the dynamic binding process to do the |
| 348 | binding (indirectly through the module table and the reference symbol |
| 349 | table when this is a dynamically linked shared library file). */ |
| 350 | |
| 351 | unsigned long ilocalsym; /* Index to local symbols. */ |
| 352 | unsigned long nlocalsym; /* Number of local symbols. */ |
| 353 | unsigned long iextdefsym; /* Index to externally defined symbols. */ |
| 354 | unsigned long nextdefsym; /* Number of externally defined symbols. */ |
| 355 | unsigned long iundefsym; /* Index to undefined symbols. */ |
| 356 | unsigned long nundefsym; /* Number of undefined symbols. */ |
| 357 | |
| 358 | /* For the for the dynamic binding process to find which module a symbol |
| 359 | is defined in the table of contents is used (analogous to the ranlib |
| 360 | structure in an archive) which maps defined external symbols to modules |
| 361 | they are defined in. This exists only in a dynamically linked shared |
| 362 | library file. For executable and object modules the defined external |
| 363 | symbols are sorted by name and is use as the table of contents. */ |
| 364 | |
| 365 | unsigned long tocoff; /* File offset to table of contents. */ |
| 366 | unsigned long ntoc; /* Number of entries in table of contents. */ |
| 367 | |
| 368 | /* To support dynamic binding of "modules" (whole object files) the symbol |
| 369 | table must reflect the modules that the file was created from. This is |
| 370 | done by having a module table that has indexes and counts into the merged |
| 371 | tables for each module. The module structure that these two entries |
| 372 | refer to is described below. This exists only in a dynamically linked |
| 373 | shared library file. For executable and object modules the file only |
| 374 | contains one module so everything in the file belongs to the module. */ |
| 375 | |
| 376 | unsigned long modtaboff; /* File offset to module table. */ |
| 377 | unsigned long nmodtab; /* Number of module table entries. */ |
| 378 | |
| 379 | /* To support dynamic module binding the module structure for each module |
| 380 | indicates the external references (defined and undefined) each module |
| 381 | makes. For each module there is an offset and a count into the |
| 382 | reference symbol table for the symbols that the module references. |
| 383 | This exists only in a dynamically linked shared library file. For |
| 384 | executable and object modules the defined external symbols and the |
| 385 | undefined external symbols indicates the external references. */ |
| 386 | |
| 387 | unsigned long extrefsymoff; /* Offset to referenced symbol table. */ |
| 388 | unsigned long nextrefsyms; /* Number of referenced symbol table entries. */ |
| 389 | |
| 390 | /* The sections that contain "symbol pointers" and "routine stubs" have |
| 391 | indexes and (implied counts based on the size of the section and fixed |
| 392 | size of the entry) into the "indirect symbol" table for each pointer |
| 393 | and stub. For every section of these two types the index into the |
| 394 | indirect symbol table is stored in the section header in the field |
| 395 | reserved1. An indirect symbol table entry is simply a 32bit index into |
| 396 | the symbol table to the symbol that the pointer or stub is referring to. |
| 397 | The indirect symbol table is ordered to match the entries in the section. */ |
| 398 | |
| 399 | unsigned long indirectsymoff; /* File offset to the indirect symbol table. */ |
| 400 | unsigned long nindirectsyms; /* Number of indirect symbol table entries. */ |
| 401 | |
| 402 | /* To support relocating an individual module in a library file quickly the |
| 403 | external relocation entries for each module in the library need to be |
| 404 | accessed efficiently. Since the relocation entries can't be accessed |
| 405 | through the section headers for a library file they are separated into |
| 406 | groups of local and external entries further grouped by module. In this |
| 407 | case the presents of this load command who's extreloff, nextrel, |
| 408 | locreloff and nlocrel fields are non-zero indicates that the relocation |
| 409 | entries of non-merged sections are not referenced through the section |
| 410 | structures (and the reloff and nreloc fields in the section headers are |
| 411 | set to zero). |
| 412 | |
| 413 | Since the relocation entries are not accessed through the section headers |
| 414 | this requires the r_address field to be something other than a section |
| 415 | offset to identify the item to be relocated. In this case r_address is |
| 416 | set to the offset from the vmaddr of the first LC_SEGMENT command. |
| 417 | |
| 418 | The relocation entries are grouped by module and the module table |
| 419 | entries have indexes and counts into them for the group of external |
| 420 | relocation entries for that the module. |
| 421 | |
| 422 | For sections that are merged across modules there must not be any |
| 423 | remaining external relocation entries for them (for merged sections |
| 424 | remaining relocation entries must be local). */ |
| 425 | |
| 426 | unsigned long extreloff; /* Offset to external relocation entries. */ |
| 427 | unsigned long nextrel; /* Number of external relocation entries. */ |
| 428 | |
| 429 | /* All the local relocation entries are grouped together (they are not |
| 430 | grouped by their module since they are only used if the object is moved |
| 431 | from it statically link edited address). */ |
| 432 | |
| 433 | unsigned long locreloff; /* Offset to local relocation entries. */ |
| 434 | unsigned long nlocrel; /* Number of local relocation entries. */ |
| 435 | } |
| 436 | bfd_mach_o_dysymtab_command; |
| 437 | |
| 438 | /* An indirect symbol table entry is simply a 32bit index into the symbol table |
| 439 | to the symbol that the pointer or stub is refering to. Unless it is for a |
| 440 | non-lazy symbol pointer section for a defined symbol which strip(1) as |
| 441 | removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the |
| 442 | symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */ |
| 443 | |
| 444 | #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000 |
| 445 | #define BFD_MACH_O_INDIRECT_SYMBOL_ABS 0x40000000 |
| 446 | |
| 447 | typedef struct bfd_mach_o_thread_flavour |
| 448 | { |
| 449 | unsigned long flavour; |
| 450 | bfd_vma offset; |
| 451 | unsigned long size; |
| 452 | } |
| 453 | bfd_mach_o_thread_flavour; |
| 454 | |
| 455 | typedef struct bfd_mach_o_thread_command |
| 456 | { |
| 457 | unsigned long nflavours; |
| 458 | bfd_mach_o_thread_flavour *flavours; |
| 459 | asection *section; |
| 460 | } |
| 461 | bfd_mach_o_thread_command; |
| 462 | |
| 463 | typedef struct bfd_mach_o_dylinker_command |
| 464 | { |
| 465 | unsigned long cmd; /* LC_ID_DYLINKER or LC_LOAD_DYLINKER. */ |
| 466 | unsigned long cmdsize; /* Includes pathname string. */ |
| 467 | unsigned long name_offset; /* Offset to library's path name. */ |
| 468 | unsigned long name_len; /* Offset to library's path name. */ |
| 469 | asection *section; |
| 470 | } |
| 471 | bfd_mach_o_dylinker_command; |
| 472 | |
| 473 | typedef struct bfd_mach_o_dylib_command |
| 474 | { |
| 475 | unsigned long cmd; /* LC_ID_DYLIB or LC_LOAD_DYLIB. */ |
| 476 | unsigned long cmdsize; /* Includes pathname string. */ |
| 477 | unsigned long name_offset; /* Offset to library's path name. */ |
| 478 | unsigned long name_len; /* Offset to library's path name. */ |
| 479 | unsigned long timestamp; /* Library's build time stamp. */ |
| 480 | unsigned long current_version; /* Library's current version number. */ |
| 481 | unsigned long compatibility_version; /* Library's compatibility vers number. */ |
| 482 | asection *section; |
| 483 | } |
| 484 | bfd_mach_o_dylib_command; |
| 485 | |
| 486 | typedef struct bfd_mach_o_prebound_dylib_command |
| 487 | { |
| 488 | unsigned long cmd; /* LC_PREBOUND_DYLIB. */ |
| 489 | unsigned long cmdsize; /* Includes strings. */ |
| 490 | unsigned long name; /* Library's path name. */ |
| 491 | unsigned long nmodules; /* Number of modules in library. */ |
| 492 | unsigned long linked_modules; /* Bit vector of linked modules. */ |
| 493 | asection *section; |
| 494 | } |
| 495 | bfd_mach_o_prebound_dylib_command; |
| 496 | |
| 497 | typedef struct bfd_mach_o_uuid_command |
| 498 | { |
| 499 | unsigned long cmd; /* LC_PREBOUND_DYLIB. */ |
| 500 | unsigned long cmdsize; /* Includes uuid. */ |
| 501 | unsigned char uuid[16]; /* Uuid. */ |
| 502 | asection *section; |
| 503 | } |
| 504 | bfd_mach_o_uuid_command; |
| 505 | |
| 506 | typedef struct bfd_mach_o_load_command |
| 507 | { |
| 508 | bfd_mach_o_load_command_type type; |
| 509 | unsigned int type_required; |
| 510 | bfd_vma offset; |
| 511 | bfd_vma len; |
| 512 | union |
| 513 | { |
| 514 | bfd_mach_o_segment_command segment; |
| 515 | bfd_mach_o_symtab_command symtab; |
| 516 | bfd_mach_o_dysymtab_command dysymtab; |
| 517 | bfd_mach_o_thread_command thread; |
| 518 | bfd_mach_o_dylib_command dylib; |
| 519 | bfd_mach_o_dylinker_command dylinker; |
| 520 | bfd_mach_o_prebound_dylib_command prebound_dylib; |
| 521 | bfd_mach_o_uuid_command uuid; |
| 522 | } |
| 523 | command; |
| 524 | } |
| 525 | bfd_mach_o_load_command; |
| 526 | |
| 527 | typedef struct mach_o_data_struct |
| 528 | { |
| 529 | bfd_mach_o_header header; |
| 530 | bfd_mach_o_load_command *commands; |
| 531 | unsigned long nsymbols; |
| 532 | asymbol *symbols; |
| 533 | unsigned long nsects; |
| 534 | bfd_mach_o_section **sections; |
| 535 | bfd *ibfd; |
| 536 | } |
| 537 | mach_o_data_struct; |
| 538 | |
| 539 | #define bfd_get_mach_o_data(abfd) ((abfd)->tdata.mach_o_data) |
| 540 | |
| 541 | typedef struct mach_o_data_struct bfd_mach_o_data_struct; |
| 542 | |
| 543 | bfd_boolean bfd_mach_o_valid (bfd *); |
| 544 | int bfd_mach_o_scan_read_symtab_symbol (bfd *, bfd_mach_o_symtab_command *, asymbol *, unsigned long); |
| 545 | int bfd_mach_o_scan_read_symtab_strtab (bfd *, bfd_mach_o_symtab_command *); |
| 546 | int bfd_mach_o_scan_read_symtab_symbols (bfd *, bfd_mach_o_symtab_command *); |
| 547 | int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, asymbol *, unsigned long); |
| 548 | int bfd_mach_o_scan_start_address (bfd *); |
| 549 | int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *); |
| 550 | bfd_boolean bfd_mach_o_mkobject (bfd *); |
| 551 | const bfd_target * bfd_mach_o_object_p (bfd *); |
| 552 | const bfd_target * bfd_mach_o_core_p (bfd *); |
| 553 | const bfd_target * bfd_mach_o_archive_p (bfd *); |
| 554 | bfd * bfd_mach_o_openr_next_archived_file (bfd *, bfd *); |
| 555 | int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **); |
| 556 | int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **); |
| 557 | unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type); |
| 558 | int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *); |
| 559 | char * bfd_mach_o_core_file_failing_command (bfd *); |
| 560 | int bfd_mach_o_core_file_failing_signal (bfd *); |
| 561 | bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *); |
| 562 | bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *); |
| 563 | |
| 564 | extern const bfd_target mach_o_be_vec; |
| 565 | extern const bfd_target mach_o_le_vec; |
| 566 | extern const bfd_target mach_o_fat_vec; |
| 567 | |
| 568 | #endif /* _BFD_MACH_O_H_ */ |