bfd/mach-o.h

   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
  55 typedef 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 }
  62 bfd_mach_o_mach_header_magic;
  63
  64 typedef 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 }
  74 bfd_mach_o_ppc_thread_flavour;
  75
  76 /* Defined in <mach/i386/thread_status.h> */
  77 typedef 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 }
  93 bfd_mach_o_i386_thread_flavour;
  94
  95 #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
  96
  97 typedef 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 }
 137 bfd_mach_o_load_command_type;
 138
 139 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
 140
 141 typedef enum bfd_mach_o_cpu_type
 142 {
 143   BFD_MACH_O_CPU_TYPE_VAX = 1,
 144   BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
 145   BFD_MACH_O_CPU_TYPE_I386 = 7,
 146   BFD_MACH_O_CPU_TYPE_MIPS = 8,
 147   BFD_MACH_O_CPU_TYPE_MC98000 = 10,
 148   BFD_MACH_O_CPU_TYPE_HPPA = 11,
 149   BFD_MACH_O_CPU_TYPE_ARM = 12,
 150   BFD_MACH_O_CPU_TYPE_MC88000 = 13,
 151   BFD_MACH_O_CPU_TYPE_SPARC = 14,
 152   BFD_MACH_O_CPU_TYPE_I860 = 15,
 153   BFD_MACH_O_CPU_TYPE_ALPHA = 16,
 154   BFD_MACH_O_CPU_TYPE_POWERPC = 18,
 155   BFD_MACH_O_CPU_TYPE_POWERPC_64 = (BFD_MACH_O_CPU_TYPE_POWERPC | BFD_MACH_O_CPU_IS64BIT),
 156   BFD_MACH_O_CPU_TYPE_X86_64 = (BFD_MACH_O_CPU_TYPE_I386 | BFD_MACH_O_CPU_IS64BIT)
 157 }
 158 bfd_mach_o_cpu_type;
 159
 160 typedef enum bfd_mach_o_cpu_subtype
 161 {
 162   BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3
 163 }
 164 bfd_mach_o_cpu_subtype;
 165
 166 typedef enum bfd_mach_o_filetype
 167 {
 168   BFD_MACH_O_MH_OBJECT = 1,
 169   BFD_MACH_O_MH_EXECUTE = 2,
 170   BFD_MACH_O_MH_FVMLIB = 3,
 171   BFD_MACH_O_MH_CORE = 4,
 172   BFD_MACH_O_MH_PRELOAD = 5,
 173   BFD_MACH_O_MH_DYLIB = 6,
 174   BFD_MACH_O_MH_DYLINKER = 7,
 175   BFD_MACH_O_MH_BUNDLE = 8
 176 }
 177 bfd_mach_o_filetype;
 178
 179 typedef enum bfd_mach_o_header_flags
 180 {
 181   BFD_MACH_O_MH_NOUNDEFS                = 0x000001,
 182   BFD_MACH_O_MH_INCRLINK                = 0x000002,
 183   BFD_MACH_O_MH_DYLDLINK                = 0x000004,
 184   BFD_MACH_O_MH_BINDATLOAD              = 0x000008,
 185   BFD_MACH_O_MH_PREBOUND                = 0x000010,
 186   BFD_MACH_O_MH_SPLIT_SEGS              = 0x000020,
 187   BFD_MACH_O_MH_LAZY_INIT               = 0x000040,
 188   BFD_MACH_O_MH_TWOLEVEL                = 0x000080,
 189   BFD_MACH_O_MH_FORCE_FLAT              = 0x000100,
 190   BFD_MACH_O_MH_NOMULTIDEFS             = 0x000200,
 191   BFD_MACH_O_MH_NOFIXPREBINDING         = 0x000400,
 192   BFD_MACH_O_MH_PREBINDABLE             = 0x000800,
 193   BFD_MACH_O_MH_ALLMODSBOUND            = 0x001000,
 194   BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x002000,
 195   BFD_MACH_O_MH_CANONICAL               = 0x004000,
 196   BFD_MACH_O_MH_WEAK_DEFINES            = 0x008000,
 197   BFD_MACH_O_MH_BINDS_TO_WEAK           = 0x010000,
 198   BFD_MACH_O_MH_ALLOW_STACK_EXECUTION   = 0x020000,
 199   BFD_MACH_O_MH_ROOT_SAFE               = 0x040000,
 200   BFD_MACH_O_MH_SETUID_SAFE             = 0x080000,
 201   BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS    = 0x100000,
 202   BFD_MACH_O_MH_PIE                     = 0x200000
 203 }
 204 bfd_mach_o_header_flags;
 205
 206 /* Constants for the type of a section.  */
 207
 208 typedef enum bfd_mach_o_section_type
 209 {
 210   /* Regular section.  */
 211   BFD_MACH_O_S_REGULAR = 0x0,
 212
 213   /* Zero fill on demand section.  */
 214   BFD_MACH_O_S_ZEROFILL = 0x1,
 215
 216   /* Section with only literal C strings.  */
 217   BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
 218
 219   /* Section with only 4 byte literals.  */
 220   BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
 221
 222   /* Section with only 8 byte literals.  */
 223   BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
 224
 225   /* Section with only pointers to literals.  */
 226   BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
 227
 228   /* For the two types of symbol pointers sections and the symbol stubs
 229      section they have indirect symbol table entries.  For each of the
 230      entries in the section the indirect symbol table entries, in
 231      corresponding order in the indirect symbol table, start at the index
 232      stored in the reserved1 field of the section structure.  Since the
 233      indirect symbol table entries correspond to the entries in the
 234      section the number of indirect symbol table entries is inferred from
 235      the size of the section divided by the size of the entries in the
 236      section.  For symbol pointers sections the size of the entries in
 237      the section is 4 bytes and for symbol stubs sections the byte size
 238      of the stubs is stored in the reserved2 field of the section
 239      structure.  */
 240
 241   /* Section with only non-lazy symbol pointers.  */
 242   BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
 243
 244   /* Section with only lazy symbol pointers.  */
 245   BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
 246
 247   /* Section with only symbol stubs, byte size of stub in the reserved2
 248      field.  */
 249   BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
 250
 251   /* Section with only function pointers for initialization.  */
 252   BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
 253
 254   /* Section with only function pointers for termination.  */
 255   BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
 256
 257   /* Section contains symbols that are coalesced by the linkers.  */
 258   BFD_MACH_O_S_COALESCED = 0xb,
 259
 260   /* Zero fill on demand section (possibly larger than 4 GB).  */
 261   BFD_MACH_O_S_GB_ZEROFILL = 0xc,
 262
 263   /* Section with only pairs of function pointers for interposing.  */
 264   BFD_MACH_O_S_INTERPOSING = 0xd,
 265
 266   /* Section with only 16 byte literals.  */
 267   BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
 268
 269   /* Section contains DTrace Object Format.  */
 270   BFD_MACH_O_S_DTRACE_DOF = 0xf,
 271
 272   /* Section with only lazy symbol pointers to lazy loaded dylibs.  */
 273   BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
 274 }
 275 bfd_mach_o_section_type;
 276
 277 /* The flags field of a section structure is separated into two parts a section
 278    type and section attributes.  The section types are mutually exclusive (it
 279    can only have one type) but the section attributes are not (it may have more
 280    than one attribute).  */
 281
 282 #define BFD_MACH_O_SECTION_TYPE_MASK        0x000000ff
 283
 284 /* Constants for the section attributes part of the flags field of a section
 285    structure.  */
 286 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK  0xffffff00
 287 /* System setable attributes.  */
 288 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS   0x00ffff00
 289 /* User attributes.  */
 290 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR   0xff000000
 291
 292 typedef enum bfd_mach_o_section_attribute
 293 {
 294   /* Section has local relocation entries.  */
 295   BFD_MACH_O_S_ATTR_LOC_RELOC         = 0x00000100,
 296
 297   /* Section has external relocation entries.  */
 298   BFD_MACH_O_S_ATTR_EXT_RELOC         = 0x00000200,
 299
 300   /* Section contains some machine instructions.  */
 301   BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
 302
 303   /* A debug section.  */
 304   BFD_MACH_O_S_ATTR_DEBUG             = 0x02000000,
 305
 306   /* Used with i386 stubs.  */
 307   BFD_MACH_O_S_SELF_MODIFYING_CODE    = 0x04000000,
 308
 309   /* Blocks are live if they reference live blocks.  */
 310   BFD_MACH_O_S_ATTR_LIVE_SUPPORT      = 0x08000000,
 311
 312   /* No dead stripping.  */
 313   BFD_MACH_O_S_ATTR_NO_DEAD_STRIP     = 0x10000000,
 314
 315   /* Section symbols can be stripped in files with MH_DYLDLINK flag.  */
 316   BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
 317
 318   /* Section contains coalesced symbols that are not to be in the TOC of an
 319      archive.  */
 320   BFD_MACH_O_S_ATTR_NO_TOC            = 0x40000000,
 321
 322   /* Section contains only true machine instructions.  */
 323   BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000
 324 }
 325 bfd_mach_o_section_attribute;
 326
 327 typedef struct bfd_mach_o_header
 328 {
 329   unsigned long magic;
 330   unsigned long cputype;
 331   unsigned long cpusubtype;
 332   unsigned long filetype;
 333   unsigned long ncmds;
 334   unsigned long sizeofcmds;
 335   unsigned long flags;
 336   unsigned int reserved;
 337   /* Version 1: 32 bits, version 2: 64 bits.  */
 338   unsigned int version;
 339   enum bfd_endian byteorder;
 340 }
 341 bfd_mach_o_header;
 342
 343 #define BFD_MACH_O_HEADER_SIZE 28
 344 #define BFD_MACH_O_HEADER_64_SIZE 32
 345
 346 typedef struct bfd_mach_o_section
 347 {
 348   asection *bfdsection;
 349   char sectname[16 + 1];
 350   char segname[16 + 1];
 351   bfd_vma addr;
 352   bfd_vma size;
 353   bfd_vma offset;
 354   unsigned long align;
 355   bfd_vma reloff;
 356   unsigned long nreloc;
 357   unsigned long flags;
 358   unsigned long reserved1;
 359   unsigned long reserved2;
 360   unsigned long reserved3;
 361 }
 362 bfd_mach_o_section;
 363 #define BFD_MACH_O_SECTION_SIZE 68
 364 #define BFD_MACH_O_SECTION_64_SIZE 80
 365
 366 typedef struct bfd_mach_o_segment_command
 367 {
 368   char segname[16 + 1];
 369   bfd_vma vmaddr;
 370   bfd_vma vmsize;
 371   bfd_vma fileoff;
 372   unsigned long filesize;
 373   unsigned long maxprot;        /* Maximum permitted protection.  */
 374   unsigned long initprot;       /* Initial protection.  */
 375   unsigned long nsects;
 376   unsigned long flags;
 377   bfd_mach_o_section *sections;
 378 }
 379 bfd_mach_o_segment_command;
 380 #define BFD_MACH_O_LC_SEGMENT_SIZE 56
 381 #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72
 382
 383 /* Protection flags.  */
 384 #define BFD_MACH_O_PROT_READ    0x01
 385 #define BFD_MACH_O_PROT_WRITE   0x02
 386 #define BFD_MACH_O_PROT_EXECUTE 0x04
 387
 388 /* Generic relocation types (used by i386).  */
 389 #define BFD_MACH_O_GENERIC_RELOC_VANILLA        0
 390 #define BFD_MACH_O_GENERIC_RELOC_PAIR           1
 391 #define BFD_MACH_O_GENERIC_RELOC_SECTDIFF       2
 392 #define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR      3
 393 #define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
 394
 395 /* Size of a relocation entry.  */
 396 #define BFD_MACH_O_RELENT_SIZE 8
 397
 398 /* Fields for a normal (non-scattered) entry.  */
 399 #define BFD_MACH_O_R_PCREL              0x01000000
 400 #define BFD_MACH_O_GET_R_LENGTH(s)      (((s) >> 25) & 0x3)
 401 #define BFD_MACH_O_R_EXTERN             0x08000000
 402 #define BFD_MACH_O_GET_R_TYPE(s)        (((s) >> 28) & 0x0f)
 403 #define BFD_MACH_O_GET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 404 #define BFD_MACH_O_SET_R_LENGTH(l)      (((l) & 0x3) << 25)
 405 #define BFD_MACH_O_SET_R_TYPE(t)        (((t) & 0xf) << 28)
 406 #define BFD_MACH_O_SET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 407
 408 /* Fields for a scattered entry.  */
 409 #define BFD_MACH_O_SR_SCATTERED         0x80000000
 410 #define BFD_MACH_O_SR_PCREL             0x40000000
 411 #define BFD_MACH_O_GET_SR_LENGTH(s)     (((s) >> 28) & 0x3)
 412 #define BFD_MACH_O_GET_SR_TYPE(s)       (((s) >> 24) & 0x0f)
 413 #define BFD_MACH_O_GET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 414 #define BFD_MACH_O_SET_SR_LENGTH(l)     (((l) & 0x3) << 28)
 415 #define BFD_MACH_O_SET_SR_TYPE(t)       (((t) & 0xf) << 24)
 416 #define BFD_MACH_O_SET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 417
 418 /* Expanded internal representation of a relocation entry.  */
 419 typedef struct bfd_mach_o_reloc_info
 420 {
 421   bfd_vma r_address;
 422   bfd_vma r_value;
 423   unsigned int r_scattered : 1;
 424   unsigned int r_type : 4;
 425   unsigned int r_pcrel : 1;
 426   unsigned int r_length : 2;
 427   unsigned int r_extern : 1;
 428 }
 429 bfd_mach_o_reloc_info;
 430
 431 typedef struct bfd_mach_o_asymbol
 432 {
 433   /* The actual symbol which the rest of BFD works with.  */
 434   asymbol symbol;
 435
 436   /* Fields from Mach-O symbol.  */
 437   unsigned char n_type;
 438   unsigned char n_sect;
 439   unsigned short n_desc;
 440 }
 441 bfd_mach_o_asymbol;
 442 #define BFD_MACH_O_NLIST_SIZE 12
 443 #define BFD_MACH_O_NLIST_64_SIZE 16
 444
 445 typedef struct bfd_mach_o_symtab_command
 446 {
 447   unsigned int symoff;
 448   unsigned int nsyms;
 449   unsigned int stroff;
 450   unsigned int strsize;
 451   bfd_mach_o_asymbol *symbols;
 452   char *strtab;
 453 }
 454 bfd_mach_o_symtab_command;
 455
 456 /* This is the second set of the symbolic information which is used to support
 457    the data structures for the dynamically link editor.
 458
 459    The original set of symbolic information in the symtab_command which contains
 460    the symbol and string tables must also be present when this load command is
 461    present.  When this load command is present the symbol table is organized
 462    into three groups of symbols:
 463        local symbols (static and debugging symbols) - grouped by module
 464        defined external symbols - grouped by module (sorted by name if not lib)
 465        undefined external symbols (sorted by name)
 466    In this load command there are offsets and counts to each of the three groups
 467    of symbols.
 468
 469    This load command contains a the offsets and sizes of the following new
 470    symbolic information tables:
 471        table of contents
 472        module table
 473        reference symbol table
 474        indirect symbol table
 475    The first three tables above (the table of contents, module table and
 476    reference symbol table) are only present if the file is a dynamically linked
 477    shared library.  For executable and object modules, which are files
 478    containing only one module, the information that would be in these three
 479    tables is determined as follows:
 480        table of contents - the defined external symbols are sorted by name
 481        module table - the file contains only one module so everything in the
 482                       file is part of the module.
 483        reference symbol table - is the defined and undefined external symbols
 484
 485    For dynamically linked shared library files this load command also contains
 486    offsets and sizes to the pool of relocation entries for all sections
 487    separated into two groups:
 488        external relocation entries
 489        local relocation entries
 490    For executable and object modules the relocation entries continue to hang
 491    off the section structures.  */
 492
 493 typedef struct bfd_mach_o_dylib_module
 494 {
 495   /* Index into the string table indicating the name of the module.  */
 496   unsigned long module_name_idx;
 497   char *module_name;
 498
 499   /* Index into the symbol table of the first defined external symbol provided
 500      by the module.  */
 501   unsigned long iextdefsym;
 502
 503   /* Number of external symbols provided by this module.  */
 504   unsigned long nextdefsym;
 505
 506   /* Index into the external reference table of the first entry
 507      provided by this module.  */
 508   unsigned long irefsym;
 509
 510   /* Number of external reference entries provided by this module.  */
 511   unsigned long nrefsym;
 512
 513   /* Index into the symbol table of the first local symbol provided by this
 514      module.  */
 515   unsigned long ilocalsym;
 516
 517   /* Number of local symbols provided by this module.  */
 518   unsigned long nlocalsym;
 519
 520   /* Index into the external relocation table of the first entry provided
 521      by this module.  */
 522   unsigned long iextrel;
 523
 524   /* Number of external relocation entries provided by this module.  */
 525   unsigned long nextrel;
 526
 527   /* Index in the module initialization section to the pointers for this
 528      module.  */
 529   unsigned short iinit;
 530
 531   /* Index in the module termination section to the pointers for this
 532      module.  */
 533   unsigned short iterm;
 534
 535   /* Number of pointers in the module initialization for this module.  */
 536   unsigned short ninit;
 537
 538   /* Number of pointers in the module termination for this module.  */
 539   unsigned short nterm;
 540
 541   /* Number of data byte for this module that are used in the __module_info
 542      section of the __OBJC segment.  */
 543   unsigned long objc_module_info_size;
 544
 545   /* Statically linked address of the start of the data for this module
 546      in the __module_info section of the __OBJC_segment.  */
 547   bfd_vma objc_module_info_addr;
 548 }
 549 bfd_mach_o_dylib_module;
 550 #define BFD_MACH_O_DYLIB_MODULE_SIZE 52
 551 #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
 552
 553 typedef struct bfd_mach_o_dylib_table_of_content
 554 {
 555   /* Index into the symbol table to the defined external symbol.  */
 556   unsigned long symbol_index;
 557
 558   /* Index into the module table to the module for this entry.  */
 559   unsigned long module_index;
 560 }
 561 bfd_mach_o_dylib_table_of_content;
 562 #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
 563
 564 typedef struct bfd_mach_o_dylib_reference
 565 {
 566   /* Index into the symbol table for the symbol being referenced.  */
 567   unsigned long isym;
 568
 569   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 570   unsigned long flags;
 571 }
 572 bfd_mach_o_dylib_reference;
 573 #define BFD_MACH_O_REFERENCE_SIZE 4
 574
 575 typedef struct bfd_mach_o_dysymtab_command
 576 {
 577   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 578      are grouped into the following three groups:
 579        local symbols (further grouped by the module they are from)
 580        defined external symbols (further grouped by the module they are from)
 581        undefined symbols
 582
 583      The local symbols are used only for debugging.  The dynamic binding
 584      process may have to use them to indicate to the debugger the local
 585      symbols for a module that is being bound.
 586
 587      The last two groups are used by the dynamic binding process to do the
 588      binding (indirectly through the module table and the reference symbol
 589      table when this is a dynamically linked shared library file).  */
 590
 591   unsigned long ilocalsym;    /* Index to local symbols.  */
 592   unsigned long nlocalsym;    /* Number of local symbols.  */
 593   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 594   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 595   unsigned long iundefsym;    /* Index to undefined symbols.  */
 596   unsigned long nundefsym;    /* Number of undefined symbols.  */
 597
 598   /* For the for the dynamic binding process to find which module a symbol
 599      is defined in the table of contents is used (analogous to the ranlib
 600      structure in an archive) which maps defined external symbols to modules
 601      they are defined in.  This exists only in a dynamically linked shared
 602      library file.  For executable and object modules the defined external
 603      symbols are sorted by name and is use as the table of contents.  */
 604
 605   unsigned long tocoff;       /* File offset to table of contents.  */
 606   unsigned long ntoc;         /* Number of entries in table of contents.  */
 607
 608   /* To support dynamic binding of "modules" (whole object files) the symbol
 609      table must reflect the modules that the file was created from.  This is
 610      done by having a module table that has indexes and counts into the merged
 611      tables for each module.  The module structure that these two entries
 612      refer to is described below.  This exists only in a dynamically linked
 613      shared library file.  For executable and object modules the file only
 614      contains one module so everything in the file belongs to the module.  */
 615
 616   unsigned long modtaboff;    /* File offset to module table.  */
 617   unsigned long nmodtab;      /* Number of module table entries.  */
 618
 619   /* To support dynamic module binding the module structure for each module
 620      indicates the external references (defined and undefined) each module
 621      makes.  For each module there is an offset and a count into the
 622      reference symbol table for the symbols that the module references.
 623      This exists only in a dynamically linked shared library file.  For
 624      executable and object modules the defined external symbols and the
 625      undefined external symbols indicates the external references.  */
 626
 627   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 628   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 629
 630   /* The sections that contain "symbol pointers" and "routine stubs" have
 631      indexes and (implied counts based on the size of the section and fixed
 632      size of the entry) into the "indirect symbol" table for each pointer
 633      and stub.  For every section of these two types the index into the
 634      indirect symbol table is stored in the section header in the field
 635      reserved1.  An indirect symbol table entry is simply a 32bit index into
 636      the symbol table to the symbol that the pointer or stub is referring to.
 637      The indirect symbol table is ordered to match the entries in the section.  */
 638
 639   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 640   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 641
 642   /* To support relocating an individual module in a library file quickly the
 643      external relocation entries for each module in the library need to be
 644      accessed efficiently.  Since the relocation entries can't be accessed
 645      through the section headers for a library file they are separated into
 646      groups of local and external entries further grouped by module.  In this
 647      case the presents of this load command who's extreloff, nextrel,
 648      locreloff and nlocrel fields are non-zero indicates that the relocation
 649      entries of non-merged sections are not referenced through the section
 650      structures (and the reloff and nreloc fields in the section headers are
 651      set to zero).
 652
 653      Since the relocation entries are not accessed through the section headers
 654      this requires the r_address field to be something other than a section
 655      offset to identify the item to be relocated.  In this case r_address is
 656      set to the offset from the vmaddr of the first LC_SEGMENT command.
 657
 658      The relocation entries are grouped by module and the module table
 659      entries have indexes and counts into them for the group of external
 660      relocation entries for that the module.
 661
 662      For sections that are merged across modules there must not be any
 663      remaining external relocation entries for them (for merged sections
 664      remaining relocation entries must be local).  */
 665
 666   unsigned long extreloff;    /* Offset to external relocation entries.  */
 667   unsigned long nextrel;      /* Number of external relocation entries.  */
 668
 669   /* All the local relocation entries are grouped together (they are not
 670      grouped by their module since they are only used if the object is moved
 671      from it statically link edited address).  */
 672
 673   unsigned long locreloff;    /* Offset to local relocation entries.  */
 674   unsigned long nlocrel;      /* Number of local relocation entries.  */
 675
 676   bfd_mach_o_dylib_module *dylib_module;
 677   bfd_mach_o_dylib_table_of_content *dylib_toc;
 678   unsigned int *indirect_syms;
 679   bfd_mach_o_dylib_reference *ext_refs;
 680 }
 681 bfd_mach_o_dysymtab_command;
 682
 683 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 684    to the symbol that the pointer or stub is refering to.  Unless it is for a
 685    non-lazy symbol pointer section for a defined symbol which strip(1) has
 686    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 687    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 688
 689 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 690 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 691 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 692
 693 /* For LC_THREAD or LC_UNIXTHREAD.  */
 694
 695 typedef struct bfd_mach_o_thread_flavour
 696 {
 697   unsigned long flavour;
 698   unsigned long offset;
 699   unsigned long size;
 700 }
 701 bfd_mach_o_thread_flavour;
 702
 703 typedef struct bfd_mach_o_thread_command
 704 {
 705   unsigned long nflavours;
 706   bfd_mach_o_thread_flavour *flavours;
 707   asection *section;
 708 }
 709 bfd_mach_o_thread_command;
 710
 711 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 712
 713 typedef struct bfd_mach_o_dylinker_command
 714 {
 715   unsigned long name_offset;         /* Offset to library's path name.  */
 716   unsigned long name_len;            /* Offset to library's path name.  */
 717   char *name_str;
 718 }
 719 bfd_mach_o_dylinker_command;
 720
 721 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 722    or LC_REEXPORT_DYLIB.  */
 723
 724 typedef struct bfd_mach_o_dylib_command
 725 {
 726   unsigned long name_offset;           /* Offset to library's path name.  */
 727   unsigned long name_len;              /* Offset to library's path name.  */
 728   unsigned long timestamp;             /* Library's build time stamp.  */
 729   unsigned long current_version;       /* Library's current version number.  */
 730   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 731   char *name_str;
 732 }
 733 bfd_mach_o_dylib_command;
 734
 735 /* For LC_PREBOUND_DYLIB.  */
 736
 737 typedef struct bfd_mach_o_prebound_dylib_command
 738 {
 739   unsigned long name;                /* Library's path name.  */
 740   unsigned long nmodules;            /* Number of modules in library.  */
 741   unsigned long linked_modules;      /* Bit vector of linked modules.  */
 742 }
 743 bfd_mach_o_prebound_dylib_command;
 744
 745 /* For LC_UUID.  */
 746
 747 typedef struct bfd_mach_o_uuid_command
 748 {
 749   unsigned char uuid[16];
 750   asection *section;
 751 }
 752 bfd_mach_o_uuid_command;
 753
 754 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 755
 756 typedef struct bfd_mach_o_linkedit_command
 757 {
 758   unsigned long dataoff;
 759   unsigned long datasize;
 760 }
 761 bfd_mach_o_linkedit_command;
 762
 763 typedef struct bfd_mach_o_str_command
 764 {
 765   unsigned long stroff;
 766   unsigned long str_len;
 767   char *str;
 768 }
 769 bfd_mach_o_str_command;
 770
 771 typedef struct bfd_mach_o_load_command
 772 {
 773   bfd_mach_o_load_command_type type;
 774   bfd_boolean type_required;
 775   unsigned int offset;
 776   unsigned int len;
 777   union
 778   {
 779     bfd_mach_o_segment_command segment;
 780     bfd_mach_o_symtab_command symtab;
 781     bfd_mach_o_dysymtab_command dysymtab;
 782     bfd_mach_o_thread_command thread;
 783     bfd_mach_o_dylib_command dylib;
 784     bfd_mach_o_dylinker_command dylinker;
 785     bfd_mach_o_prebound_dylib_command prebound_dylib;
 786     bfd_mach_o_uuid_command uuid;
 787     bfd_mach_o_linkedit_command linkedit;
 788     bfd_mach_o_str_command str;
 789   }
 790   command;
 791 }
 792 bfd_mach_o_load_command;
 793
 794 typedef struct mach_o_data_struct
 795 {
 796   /* Mach-O header.  */
 797   bfd_mach_o_header header;
 798   /* Array of load commands (length is given by header.ncmds).  */
 799   bfd_mach_o_load_command *commands;
 800
 801   /* Flatten array of sections.  The array is 0-based.  */
 802   unsigned long nsects;
 803   bfd_mach_o_section **sections;
 804
 805   /* Used while writting: current length of the output file.  This is used
 806      to allocate space in the file.  */
 807   ufile_ptr filelen;
 808
 809   /* As symtab is referenced by other load command, it is handy to have
 810      a direct access to it.  Also it is not clearly stated, only one symtab
 811      is expected.  */
 812   bfd_mach_o_symtab_command *symtab;
 813   bfd_mach_o_dysymtab_command *dysymtab;
 814 }
 815 bfd_mach_o_data_struct;
 816
 817 /* Target specific routines.  */
 818 typedef struct bfd_mach_o_backend_data
 819 {
 820   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 821   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 822   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 823                                           void *, char *);
 824 }
 825 bfd_mach_o_backend_data;
 826
 827 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 828 #define bfd_mach_o_get_backend_data(abfd) \
 829   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 830
 831 bfd_boolean bfd_mach_o_valid (bfd *);
 832 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);
 833 int bfd_mach_o_scan_start_address (bfd *);
 834 int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *);
 835 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 836 const bfd_target *bfd_mach_o_object_p (bfd *);
 837 const bfd_target *bfd_mach_o_core_p (bfd *);
 838 const bfd_target *bfd_mach_o_archive_p (bfd *);
 839 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 840 int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **);
 841 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 842 bfd_boolean bfd_mach_o_write_contents (bfd *);
 843 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 844                                                      bfd *, asymbol *);
 845 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 846                                                       bfd *, asection *);
 847 bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
 848 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 849 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 850 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 851 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 852 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 853 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 854 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 855 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 856 void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);
 857 bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, PTR);
 858 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 859 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 860 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 861 char *bfd_mach_o_core_file_failing_command (bfd *);
 862 int bfd_mach_o_core_file_failing_signal (bfd *);
 863 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 864 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 865 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 866                                        bfd_mach_o_cpu_type);
 867 bfd_boolean bfd_mach_o_build_commands (bfd *);
 868 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 869                                              file_ptr, bfd_size_type);
 870 unsigned int bfd_mach_o_version (bfd *);
 871
 872 extern const bfd_target mach_o_fat_vec;
 873
 874 #endif /* _BFD_MACH_O_H_ */