1/* Mach-O support for BFD. 2 Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009 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/* 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. */ 37 38#define BFD_MACH_O_NO_SECT 0 /* Symbol not in any section of the image. */ 39 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 48 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 54 55typedef enum bfd_mach_o_mach_header_magic 56{ 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 61} 62bfd_mach_o_mach_header_magic; 63 64typedef enum bfd_mach_o_ppc_thread_flavour 65{ 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 73} 74bfd_mach_o_ppc_thread_flavour; 75 76/* Defined in <mach/i386/thread_status.h> */ 77typedef enum bfd_mach_o_i386_thread_flavour 78{ 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 92} 93bfd_mach_o_i386_thread_flavour; 94 95#define BFD_MACH_O_LC_REQ_DYLD 0x80000000 96 97typedef enum bfd_mach_o_load_command_type 98{ 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 123 missing (weak). */ 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 126 mapped. */ 127 BFD_MACH_O_LC_ROUTINES_64 = 0x1a, /* Address of the dyld init routine 128 in a dylib. */ 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. */ 137} 138bfd_mach_o_load_command_type; 139 140#define BFD_MACH_O_CPU_IS64BIT 0x1000000 141 142typedef enum bfd_mach_o_cpu_type 143{ 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) 158} 159bfd_mach_o_cpu_type; 160 161typedef enum bfd_mach_o_cpu_subtype 162{ 163 BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3 164} 165bfd_mach_o_cpu_subtype; 166 167typedef enum bfd_mach_o_filetype 168{ 169 BFD_MACH_O_MH_OBJECT = 0x01, 170 BFD_MACH_O_MH_EXECUTE = 0x02, 171 BFD_MACH_O_MH_FVMLIB = 0x03, 172 BFD_MACH_O_MH_CORE = 0x04, 173 BFD_MACH_O_MH_PRELOAD = 0x05, 174 BFD_MACH_O_MH_DYLIB = 0x06, 175 BFD_MACH_O_MH_DYLINKER = 0x07, 176 BFD_MACH_O_MH_BUNDLE = 0x08, 177 BFD_MACH_O_MH_DYLIB_STUB = 0x09, 178 BFD_MACH_O_MH_DSYM = 0x0a, 179 BFD_MACH_O_MH_KEXT_BUNDLE = 0x0b 180} 181bfd_mach_o_filetype; 182 183typedef enum bfd_mach_o_header_flags 184{ 185 BFD_MACH_O_MH_NOUNDEFS = 0x000001, 186 BFD_MACH_O_MH_INCRLINK = 0x000002, 187 BFD_MACH_O_MH_DYLDLINK = 0x000004, 188 BFD_MACH_O_MH_BINDATLOAD = 0x000008, 189 BFD_MACH_O_MH_PREBOUND = 0x000010, 190 BFD_MACH_O_MH_SPLIT_SEGS = 0x000020, 191 BFD_MACH_O_MH_LAZY_INIT = 0x000040, 192 BFD_MACH_O_MH_TWOLEVEL = 0x000080, 193 BFD_MACH_O_MH_FORCE_FLAT = 0x000100, 194 BFD_MACH_O_MH_NOMULTIDEFS = 0x000200, 195 BFD_MACH_O_MH_NOFIXPREBINDING = 0x000400, 196 BFD_MACH_O_MH_PREBINDABLE = 0x000800, 197 BFD_MACH_O_MH_ALLMODSBOUND = 0x001000, 198 BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x002000, 199 BFD_MACH_O_MH_CANONICAL = 0x004000, 200 BFD_MACH_O_MH_WEAK_DEFINES = 0x008000, 201 BFD_MACH_O_MH_BINDS_TO_WEAK = 0x010000, 202 BFD_MACH_O_MH_ALLOW_STACK_EXECUTION = 0x020000, 203 BFD_MACH_O_MH_ROOT_SAFE = 0x040000, 204 BFD_MACH_O_MH_SETUID_SAFE = 0x080000, 205 BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS = 0x100000, 206 BFD_MACH_O_MH_PIE = 0x200000 207} 208bfd_mach_o_header_flags; 209 210/* Constants for the type of a section. */ 211 212typedef enum bfd_mach_o_section_type 213{ 214 /* Regular section. */ 215 BFD_MACH_O_S_REGULAR = 0x0, 216 217 /* Zero fill on demand section. */ 218 BFD_MACH_O_S_ZEROFILL = 0x1, 219 220 /* Section with only literal C strings. */ 221 BFD_MACH_O_S_CSTRING_LITERALS = 0x2, 222 223 /* Section with only 4 byte literals. */ 224 BFD_MACH_O_S_4BYTE_LITERALS = 0x3, 225 226 /* Section with only 8 byte literals. */ 227 BFD_MACH_O_S_8BYTE_LITERALS = 0x4, 228 229 /* Section with only pointers to literals. */ 230 BFD_MACH_O_S_LITERAL_POINTERS = 0x5, 231 232 /* For the two types of symbol pointers sections and the symbol stubs 233 section they have indirect symbol table entries. For each of the 234 entries in the section the indirect symbol table entries, in 235 corresponding order in the indirect symbol table, start at the index 236 stored in the reserved1 field of the section structure. Since the 237 indirect symbol table entries correspond to the entries in the 238 section the number of indirect symbol table entries is inferred from 239 the size of the section divided by the size of the entries in the 240 section. For symbol pointers sections the size of the entries in 241 the section is 4 bytes and for symbol stubs sections the byte size 242 of the stubs is stored in the reserved2 field of the section 243 structure. */ 244 245 /* Section with only non-lazy symbol pointers. */ 246 BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6, 247 248 /* Section with only lazy symbol pointers. */ 249 BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7, 250 251 /* Section with only symbol stubs, byte size of stub in the reserved2 252 field. */ 253 BFD_MACH_O_S_SYMBOL_STUBS = 0x8, 254 255 /* Section with only function pointers for initialization. */ 256 BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9, 257 258 /* Section with only function pointers for termination. */ 259 BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa, 260 261 /* Section contains symbols that are coalesced by the linkers. */ 262 BFD_MACH_O_S_COALESCED = 0xb, 263 264 /* Zero fill on demand section (possibly larger than 4 GB). */ 265 BFD_MACH_O_S_GB_ZEROFILL = 0xc, 266 267 /* Section with only pairs of function pointers for interposing. */ 268 BFD_MACH_O_S_INTERPOSING = 0xd, 269 270 /* Section with only 16 byte literals. */ 271 BFD_MACH_O_S_16BYTE_LITERALS = 0xe, 272 273 /* Section contains DTrace Object Format. */ 274 BFD_MACH_O_S_DTRACE_DOF = 0xf, 275 276 /* Section with only lazy symbol pointers to lazy loaded dylibs. */ 277 BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10 278} 279bfd_mach_o_section_type; 280 281/* The flags field of a section structure is separated into two parts a section 282 type and section attributes. The section types are mutually exclusive (it 283 can only have one type) but the section attributes are not (it may have more 284 than one attribute). */ 285 286#define BFD_MACH_O_SECTION_TYPE_MASK 0x000000ff 287 288/* Constants for the section attributes part of the flags field of a section 289 structure. */ 290#define BFD_MACH_O_SECTION_ATTRIBUTES_MASK 0xffffff00 291/* System setable attributes. */ 292#define BFD_MACH_O_SECTION_ATTRIBUTES_SYS 0x00ffff00 293/* User attributes. */ 294#define BFD_MACH_O_SECTION_ATTRIBUTES_USR 0xff000000 295 296typedef enum bfd_mach_o_section_attribute 297{ 298 /* Section has local relocation entries. */ 299 BFD_MACH_O_S_ATTR_LOC_RELOC = 0x00000100, 300 301 /* Section has external relocation entries. */ 302 BFD_MACH_O_S_ATTR_EXT_RELOC = 0x00000200, 303 304 /* Section contains some machine instructions. */ 305 BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400, 306 307 /* A debug section. */ 308 BFD_MACH_O_S_ATTR_DEBUG = 0x02000000, 309 310 /* Used with i386 stubs. */ 311 BFD_MACH_O_S_SELF_MODIFYING_CODE = 0x04000000, 312 313 /* Blocks are live if they reference live blocks. */ 314 BFD_MACH_O_S_ATTR_LIVE_SUPPORT = 0x08000000, 315 316 /* No dead stripping. */ 317 BFD_MACH_O_S_ATTR_NO_DEAD_STRIP = 0x10000000, 318 319 /* Section symbols can be stripped in files with MH_DYLDLINK flag. */ 320 BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000, 321 322 /* Section contains coalesced symbols that are not to be in the TOC of an 323 archive. */ 324 BFD_MACH_O_S_ATTR_NO_TOC = 0x40000000, 325 326 /* Section contains only true machine instructions. */ 327 BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000 328} 329bfd_mach_o_section_attribute; 330 331typedef struct bfd_mach_o_header 332{ 333 unsigned long magic; 334 unsigned long cputype; 335 unsigned long cpusubtype; 336 unsigned long filetype; 337 unsigned long ncmds; 338 unsigned long sizeofcmds; 339 unsigned long flags; 340 unsigned int reserved; 341 /* Version 1: 32 bits, version 2: 64 bits. */ 342 unsigned int version; 343 enum bfd_endian byteorder; 344} 345bfd_mach_o_header; 346 347#define BFD_MACH_O_HEADER_SIZE 28 348#define BFD_MACH_O_HEADER_64_SIZE 32 349 350typedef struct bfd_mach_o_section 351{ 352 asection *bfdsection; 353 char sectname[16 + 1]; 354 char segname[16 + 1]; 355 bfd_vma addr; 356 bfd_vma size; 357 bfd_vma offset; 358 unsigned long align; 359 bfd_vma reloff; 360 unsigned long nreloc; 361 unsigned long flags; 362 unsigned long reserved1; 363 unsigned long reserved2; 364 unsigned long reserved3; 365} 366bfd_mach_o_section; 367#define BFD_MACH_O_SECTION_SIZE 68 368#define BFD_MACH_O_SECTION_64_SIZE 80 369 370typedef struct bfd_mach_o_segment_command 371{ 372 char segname[16 + 1]; 373 bfd_vma vmaddr; 374 bfd_vma vmsize; 375 bfd_vma fileoff; 376 unsigned long filesize; 377 unsigned long maxprot; /* Maximum permitted protection. */ 378 unsigned long initprot; /* Initial protection. */ 379 unsigned long nsects; 380 unsigned long flags; 381 bfd_mach_o_section *sections; 382} 383bfd_mach_o_segment_command; 384#define BFD_MACH_O_LC_SEGMENT_SIZE 56 385#define BFD_MACH_O_LC_SEGMENT_64_SIZE 72 386 387/* Protection flags. */ 388#define BFD_MACH_O_PROT_READ 0x01 389#define BFD_MACH_O_PROT_WRITE 0x02 390#define BFD_MACH_O_PROT_EXECUTE 0x04 391 392/* Generic relocation types (used by i386). */ 393#define BFD_MACH_O_GENERIC_RELOC_VANILLA 0 394#define BFD_MACH_O_GENERIC_RELOC_PAIR 1 395#define BFD_MACH_O_GENERIC_RELOC_SECTDIFF 2 396#define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR 3 397#define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4 398 399/* X86-64 relocations. */ 400#define BFD_MACH_O_X86_64_RELOC_UNSIGNED 0 /* Absolute addresses. */ 401#define BFD_MACH_O_X86_64_RELOC_SIGNED 1 /* 32-bit disp. */ 402#define BFD_MACH_O_X86_64_RELOC_BRANCH 2 /* 32-bit pcrel disp. */ 403#define BFD_MACH_O_X86_64_RELOC_GOT_LOAD 3 /* Movq load of a GOT entry. */ 404#define BFD_MACH_O_X86_64_RELOC_GOT 4 /* GOT reference. */ 405#define BFD_MACH_O_X86_64_RELOC_SUBTRACTOR 5 /* Symbol difference. */ 406#define BFD_MACH_O_X86_64_RELOC_SIGNED_1 6 /* 32-bit signed disp -1. */ 407#define BFD_MACH_O_X86_64_RELOC_SIGNED_2 7 /* 32-bit signed disp -2. */ 408#define BFD_MACH_O_X86_64_RELOC_SIGNED_4 8 /* 32-bit signed disp -4. */ 409 410/* Size of a relocation entry. */ 411#define BFD_MACH_O_RELENT_SIZE 8 412 413/* Fields for a normal (non-scattered) entry. */ 414#define BFD_MACH_O_R_PCREL 0x01000000 415#define BFD_MACH_O_GET_R_LENGTH(s) (((s) >> 25) & 0x3) 416#define BFD_MACH_O_R_EXTERN 0x08000000 417#define BFD_MACH_O_GET_R_TYPE(s) (((s) >> 28) & 0x0f) 418#define BFD_MACH_O_GET_R_SYMBOLNUM(s) ((s) & 0x00ffffff) 419#define BFD_MACH_O_SET_R_LENGTH(l) (((l) & 0x3) << 25) 420#define BFD_MACH_O_SET_R_TYPE(t) (((t) & 0xf) << 28) 421#define BFD_MACH_O_SET_R_SYMBOLNUM(s) ((s) & 0x00ffffff) 422 423/* Fields for a scattered entry. */ 424#define BFD_MACH_O_SR_SCATTERED 0x80000000 425#define BFD_MACH_O_SR_PCREL 0x40000000 426#define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3) 427#define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f) 428#define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff) 429#define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28) 430#define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24) 431#define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff) 432 433/* Expanded internal representation of a relocation entry. */ 434typedef struct bfd_mach_o_reloc_info 435{ 436 bfd_vma r_address; 437 bfd_vma r_value; 438 unsigned int r_scattered : 1; 439 unsigned int r_type : 4; 440 unsigned int r_pcrel : 1; 441 unsigned int r_length : 2; 442 unsigned int r_extern : 1; 443} 444bfd_mach_o_reloc_info; 445 446typedef struct bfd_mach_o_asymbol 447{ 448 /* The actual symbol which the rest of BFD works with. */ 449 asymbol symbol; 450 451 /* Fields from Mach-O symbol. */ 452 unsigned char n_type; 453 unsigned char n_sect; 454 unsigned short n_desc; 455} 456bfd_mach_o_asymbol; 457#define BFD_MACH_O_NLIST_SIZE 12 458#define BFD_MACH_O_NLIST_64_SIZE 16 459 460typedef struct bfd_mach_o_symtab_command 461{ 462 unsigned int symoff; 463 unsigned int nsyms; 464 unsigned int stroff; 465 unsigned int strsize; 466 bfd_mach_o_asymbol *symbols; 467 char *strtab; 468} 469bfd_mach_o_symtab_command; 470 471/* This is the second set of the symbolic information which is used to support 472 the data structures for the dynamically link editor. 473 474 The original set of symbolic information in the symtab_command which contains 475 the symbol and string tables must also be present when this load command is 476 present. When this load command is present the symbol table is organized 477 into three groups of symbols: 478 local symbols (static and debugging symbols) - grouped by module 479 defined external symbols - grouped by module (sorted by name if not lib) 480 undefined external symbols (sorted by name) 481 In this load command there are offsets and counts to each of the three groups 482 of symbols. 483 484 This load command contains a the offsets and sizes of the following new 485 symbolic information tables: 486 table of contents 487 module table 488 reference symbol table 489 indirect symbol table 490 The first three tables above (the table of contents, module table and 491 reference symbol table) are only present if the file is a dynamically linked 492 shared library. For executable and object modules, which are files 493 containing only one module, the information that would be in these three 494 tables is determined as follows: 495 table of contents - the defined external symbols are sorted by name 496 module table - the file contains only one module so everything in the 497 file is part of the module. 498 reference symbol table - is the defined and undefined external symbols 499 500 For dynamically linked shared library files this load command also contains 501 offsets and sizes to the pool of relocation entries for all sections 502 separated into two groups: 503 external relocation entries 504 local relocation entries 505 For executable and object modules the relocation entries continue to hang 506 off the section structures. */ 507 508typedef struct bfd_mach_o_dylib_module 509{ 510 /* Index into the string table indicating the name of the module. */ 511 unsigned long module_name_idx; 512 char *module_name; 513 514 /* Index into the symbol table of the first defined external symbol provided 515 by the module. */ 516 unsigned long iextdefsym; 517 518 /* Number of external symbols provided by this module. */ 519 unsigned long nextdefsym; 520 521 /* Index into the external reference table of the first entry 522 provided by this module. */ 523 unsigned long irefsym; 524 525 /* Number of external reference entries provided by this module. */ 526 unsigned long nrefsym; 527 528 /* Index into the symbol table of the first local symbol provided by this 529 module. */ 530 unsigned long ilocalsym; 531 532 /* Number of local symbols provided by this module. */ 533 unsigned long nlocalsym; 534 535 /* Index into the external relocation table of the first entry provided 536 by this module. */ 537 unsigned long iextrel; 538 539 /* Number of external relocation entries provided by this module. */ 540 unsigned long nextrel; 541 542 /* Index in the module initialization section to the pointers for this 543 module. */ 544 unsigned short iinit; 545 546 /* Index in the module termination section to the pointers for this 547 module. */ 548 unsigned short iterm; 549 550 /* Number of pointers in the module initialization for this module. */ 551 unsigned short ninit; 552 553 /* Number of pointers in the module termination for this module. */ 554 unsigned short nterm; 555 556 /* Number of data byte for this module that are used in the __module_info 557 section of the __OBJC segment. */ 558 unsigned long objc_module_info_size; 559 560 /* Statically linked address of the start of the data for this module 561 in the __module_info section of the __OBJC_segment. */ 562 bfd_vma objc_module_info_addr; 563} 564bfd_mach_o_dylib_module; 565#define BFD_MACH_O_DYLIB_MODULE_SIZE 52 566#define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56 567 568typedef struct bfd_mach_o_dylib_table_of_content 569{ 570 /* Index into the symbol table to the defined external symbol. */ 571 unsigned long symbol_index; 572 573 /* Index into the module table to the module for this entry. */ 574 unsigned long module_index; 575} 576bfd_mach_o_dylib_table_of_content; 577#define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8 578 579typedef struct bfd_mach_o_dylib_reference 580{ 581 /* Index into the symbol table for the symbol being referenced. */ 582 unsigned long isym; 583 584 /* Type of the reference being made (use REFERENCE_FLAGS constants). */ 585 unsigned long flags; 586} 587bfd_mach_o_dylib_reference; 588#define BFD_MACH_O_REFERENCE_SIZE 4 589 590typedef struct bfd_mach_o_dysymtab_command 591{ 592 /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command 593 are grouped into the following three groups: 594 local symbols (further grouped by the module they are from) 595 defined external symbols (further grouped by the module they are from) 596 undefined symbols 597 598 The local symbols are used only for debugging. The dynamic binding 599 process may have to use them to indicate to the debugger the local 600 symbols for a module that is being bound. 601 602 The last two groups are used by the dynamic binding process to do the 603 binding (indirectly through the module table and the reference symbol 604 table when this is a dynamically linked shared library file). */ 605 606 unsigned long ilocalsym; /* Index to local symbols. */ 607 unsigned long nlocalsym; /* Number of local symbols. */ 608 unsigned long iextdefsym; /* Index to externally defined symbols. */ 609 unsigned long nextdefsym; /* Number of externally defined symbols. */ 610 unsigned long iundefsym; /* Index to undefined symbols. */ 611 unsigned long nundefsym; /* Number of undefined symbols. */ 612 613 /* For the for the dynamic binding process to find which module a symbol 614 is defined in the table of contents is used (analogous to the ranlib 615 structure in an archive) which maps defined external symbols to modules 616 they are defined in. This exists only in a dynamically linked shared 617 library file. For executable and object modules the defined external 618 symbols are sorted by name and is use as the table of contents. */ 619 620 unsigned long tocoff; /* File offset to table of contents. */ 621 unsigned long ntoc; /* Number of entries in table of contents. */ 622 623 /* To support dynamic binding of "modules" (whole object files) the symbol 624 table must reflect the modules that the file was created from. This is 625 done by having a module table that has indexes and counts into the merged 626 tables for each module. The module structure that these two entries 627 refer to is described below. This exists only in a dynamically linked 628 shared library file. For executable and object modules the file only 629 contains one module so everything in the file belongs to the module. */ 630 631 unsigned long modtaboff; /* File offset to module table. */ 632 unsigned long nmodtab; /* Number of module table entries. */ 633 634 /* To support dynamic module binding the module structure for each module 635 indicates the external references (defined and undefined) each module 636 makes. For each module there is an offset and a count into the 637 reference symbol table for the symbols that the module references. 638 This exists only in a dynamically linked shared library file. For 639 executable and object modules the defined external symbols and the 640 undefined external symbols indicates the external references. */ 641 642 unsigned long extrefsymoff; /* Offset to referenced symbol table. */ 643 unsigned long nextrefsyms; /* Number of referenced symbol table entries. */ 644 645 /* The sections that contain "symbol pointers" and "routine stubs" have 646 indexes and (implied counts based on the size of the section and fixed 647 size of the entry) into the "indirect symbol" table for each pointer 648 and stub. For every section of these two types the index into the 649 indirect symbol table is stored in the section header in the field 650 reserved1. An indirect symbol table entry is simply a 32bit index into 651 the symbol table to the symbol that the pointer or stub is referring to. 652 The indirect symbol table is ordered to match the entries in the section. */ 653 654 unsigned long indirectsymoff; /* File offset to the indirect symbol table. */ 655 unsigned long nindirectsyms; /* Number of indirect symbol table entries. */ 656 657 /* To support relocating an individual module in a library file quickly the 658 external relocation entries for each module in the library need to be 659 accessed efficiently. Since the relocation entries can't be accessed 660 through the section headers for a library file they are separated into 661 groups of local and external entries further grouped by module. In this 662 case the presents of this load command who's extreloff, nextrel, 663 locreloff and nlocrel fields are non-zero indicates that the relocation 664 entries of non-merged sections are not referenced through the section 665 structures (and the reloff and nreloc fields in the section headers are 666 set to zero). 667 668 Since the relocation entries are not accessed through the section headers 669 this requires the r_address field to be something other than a section 670 offset to identify the item to be relocated. In this case r_address is 671 set to the offset from the vmaddr of the first LC_SEGMENT command. 672 673 The relocation entries are grouped by module and the module table 674 entries have indexes and counts into them for the group of external 675 relocation entries for that the module. 676 677 For sections that are merged across modules there must not be any 678 remaining external relocation entries for them (for merged sections 679 remaining relocation entries must be local). */ 680 681 unsigned long extreloff; /* Offset to external relocation entries. */ 682 unsigned long nextrel; /* Number of external relocation entries. */ 683 684 /* All the local relocation entries are grouped together (they are not 685 grouped by their module since they are only used if the object is moved 686 from it statically link edited address). */ 687 688 unsigned long locreloff; /* Offset to local relocation entries. */ 689 unsigned long nlocrel; /* Number of local relocation entries. */ 690 691 bfd_mach_o_dylib_module *dylib_module; 692 bfd_mach_o_dylib_table_of_content *dylib_toc; 693 unsigned int *indirect_syms; 694 bfd_mach_o_dylib_reference *ext_refs; 695} 696bfd_mach_o_dysymtab_command; 697 698/* An indirect symbol table entry is simply a 32bit index into the symbol table 699 to the symbol that the pointer or stub is refering to. Unless it is for a 700 non-lazy symbol pointer section for a defined symbol which strip(1) has 701 removed. In which case it has the value INDIRECT_SYMBOL_LOCAL. If the 702 symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that. */ 703 704#define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000 705#define BFD_MACH_O_INDIRECT_SYMBOL_ABS 0x40000000 706#define BFD_MACH_O_INDIRECT_SYMBOL_SIZE 4 707 708/* For LC_THREAD or LC_UNIXTHREAD. */ 709 710typedef struct bfd_mach_o_thread_flavour 711{ 712 unsigned long flavour; 713 unsigned long offset; 714 unsigned long size; 715} 716bfd_mach_o_thread_flavour; 717 718typedef struct bfd_mach_o_thread_command 719{ 720 unsigned long nflavours; 721 bfd_mach_o_thread_flavour *flavours; 722 asection *section; 723} 724bfd_mach_o_thread_command; 725 726/* For LC_LOAD_DYLINKER and LC_ID_DYLINKER. */ 727 728typedef struct bfd_mach_o_dylinker_command 729{ 730 unsigned long name_offset; /* Offset to library's path name. */ 731 unsigned long name_len; /* Offset to library's path name. */ 732 char *name_str; 733} 734bfd_mach_o_dylinker_command; 735 736/* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB 737 or LC_REEXPORT_DYLIB. */ 738 739typedef struct bfd_mach_o_dylib_command 740{ 741 unsigned long name_offset; /* Offset to library's path name. */ 742 unsigned long name_len; /* Offset to library's path name. */ 743 unsigned long timestamp; /* Library's build time stamp. */ 744 unsigned long current_version; /* Library's current version number. */ 745 unsigned long compatibility_version; /* Library's compatibility vers number. */ 746 char *name_str; 747} 748bfd_mach_o_dylib_command; 749 750/* For LC_PREBOUND_DYLIB. */ 751 752typedef struct bfd_mach_o_prebound_dylib_command 753{ 754 unsigned long name; /* Library's path name. */ 755 unsigned long nmodules; /* Number of modules in library. */ 756 unsigned long linked_modules; /* Bit vector of linked modules. */ 757} 758bfd_mach_o_prebound_dylib_command; 759 760/* For LC_UUID. */ 761 762typedef struct bfd_mach_o_uuid_command 763{ 764 unsigned char uuid[16]; 765} 766bfd_mach_o_uuid_command; 767 768/* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO. */ 769 770typedef struct bfd_mach_o_linkedit_command 771{ 772 unsigned long dataoff; 773 unsigned long datasize; 774} 775bfd_mach_o_linkedit_command; 776 777typedef struct bfd_mach_o_str_command 778{ 779 unsigned long stroff; 780 unsigned long str_len; 781 char *str; 782} 783bfd_mach_o_str_command; 784 785typedef struct bfd_mach_o_dyld_info_command 786{ 787 /* File offset and size to rebase info. */ 788 unsigned int rebase_off; 789 unsigned int rebase_size; 790 791 /* File offset and size of binding info. */ 792 unsigned int bind_off; 793 unsigned int bind_size; 794 795 /* File offset and size of weak binding info. */ 796 unsigned int weak_bind_off; 797 unsigned int weak_bind_size; 798 799 /* File offset and size of lazy binding info. */ 800 unsigned int lazy_bind_off; 801 unsigned int lazy_bind_size; 802 803 /* File offset and size of export info. */ 804 unsigned int export_off; 805 unsigned int export_size; 806} 807bfd_mach_o_dyld_info_command; 808 809typedef struct bfd_mach_o_load_command 810{ 811 bfd_mach_o_load_command_type type; 812 bfd_boolean type_required; 813 unsigned int offset; 814 unsigned int len; 815 union 816 { 817 bfd_mach_o_segment_command segment; 818 bfd_mach_o_symtab_command symtab; 819 bfd_mach_o_dysymtab_command dysymtab; 820 bfd_mach_o_thread_command thread; 821 bfd_mach_o_dylib_command dylib; 822 bfd_mach_o_dylinker_command dylinker; 823 bfd_mach_o_prebound_dylib_command prebound_dylib; 824 bfd_mach_o_uuid_command uuid; 825 bfd_mach_o_linkedit_command linkedit; 826 bfd_mach_o_str_command str; 827 bfd_mach_o_dyld_info_command dyld_info; 828 } 829 command; 830} 831bfd_mach_o_load_command; 832 833typedef struct mach_o_data_struct 834{ 835 /* Mach-O header. */ 836 bfd_mach_o_header header; 837 /* Array of load commands (length is given by header.ncmds). */ 838 bfd_mach_o_load_command *commands; 839 840 /* Flatten array of sections. The array is 0-based. */ 841 unsigned long nsects; 842 bfd_mach_o_section **sections; 843 844 /* Used while writting: current length of the output file. This is used 845 to allocate space in the file. */ 846 ufile_ptr filelen; 847 848 /* As symtab is referenced by other load command, it is handy to have 849 a direct access to it. Also it is not clearly stated, only one symtab 850 is expected. */ 851 bfd_mach_o_symtab_command *symtab; 852 bfd_mach_o_dysymtab_command *dysymtab; 853} 854bfd_mach_o_data_struct; 855 856/* Target specific routines. */ 857typedef struct bfd_mach_o_backend_data 858{ 859 enum bfd_architecture arch; 860 bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *); 861 bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *); 862 bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *, 863 void *, char *); 864} 865bfd_mach_o_backend_data; 866 867#define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data) 868#define bfd_mach_o_get_backend_data(abfd) \ 869 ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data) 870 871bfd_boolean bfd_mach_o_valid (bfd *); 872int bfd_mach_o_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, bfd_mach_o_asymbol *, unsigned long); 873int bfd_mach_o_scan_start_address (bfd *); 874int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *); 875bfd_boolean bfd_mach_o_mkobject_init (bfd *); 876const bfd_target *bfd_mach_o_object_p (bfd *); 877const bfd_target *bfd_mach_o_core_p (bfd *); 878const bfd_target *bfd_mach_o_archive_p (bfd *); 879bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *); 880bfd_boolean bfd_mach_o_set_arch_mach (bfd *, enum bfd_architecture, 881 unsigned long); 882int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **); 883int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **); 884bfd_boolean bfd_mach_o_write_contents (bfd *); 885bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *, 886 bfd *, asymbol *); 887bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *, 888 bfd *, asection *); 889bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *); 890long bfd_mach_o_get_symtab_upper_bound (bfd *); 891long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **); 892long bfd_mach_o_get_synthetic_symtab (bfd *, long, asymbol **, long, 893 asymbol **, asymbol **ret); 894long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *); 895long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **); 896long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *); 897long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **); 898asymbol *bfd_mach_o_make_empty_symbol (bfd *); 899void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *); 900void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type); 901bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, PTR); 902int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *); 903unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type); 904int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *); 905char *bfd_mach_o_core_file_failing_command (bfd *); 906int bfd_mach_o_core_file_failing_signal (bfd *); 907bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *); 908bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *); 909const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype, 910 bfd_mach_o_cpu_type); 911bfd_boolean bfd_mach_o_build_commands (bfd *); 912bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *, 913 file_ptr, bfd_size_type); 914unsigned int bfd_mach_o_version (bfd *); 915 916extern const bfd_target mach_o_fat_vec; 917 918#endif /* _BFD_MACH_O_H_ */ 919