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   BFD_MACH_O_LC_DYLD_INFO = 0x22        /* Compressed dyld information.  */
 137 }
 138 bfd_mach_o_load_command_type;
 139
 140 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
 141
 142 typedef 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 }
 159 bfd_mach_o_cpu_type;
 160
 161 typedef enum bfd_mach_o_cpu_subtype
 162 {
 163   BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3
 164 }
 165 bfd_mach_o_cpu_subtype;
 166
 167 typedef enum bfd_mach_o_filetype
 168 {
 169   BFD_MACH_O_MH_OBJECT = 1,
 170   BFD_MACH_O_MH_EXECUTE = 2,
 171   BFD_MACH_O_MH_FVMLIB = 3,
 172   BFD_MACH_O_MH_CORE = 4,
 173   BFD_MACH_O_MH_PRELOAD = 5,
 174   BFD_MACH_O_MH_DYLIB = 6,
 175   BFD_MACH_O_MH_DYLINKER = 7,
 176   BFD_MACH_O_MH_BUNDLE = 8
 177 }
 178 bfd_mach_o_filetype;
 179
 180 typedef enum bfd_mach_o_header_flags
 181 {
 182   BFD_MACH_O_MH_NOUNDEFS                = 0x000001,
 183   BFD_MACH_O_MH_INCRLINK                = 0x000002,
 184   BFD_MACH_O_MH_DYLDLINK                = 0x000004,
 185   BFD_MACH_O_MH_BINDATLOAD              = 0x000008,
 186   BFD_MACH_O_MH_PREBOUND                = 0x000010,
 187   BFD_MACH_O_MH_SPLIT_SEGS              = 0x000020,
 188   BFD_MACH_O_MH_LAZY_INIT               = 0x000040,
 189   BFD_MACH_O_MH_TWOLEVEL                = 0x000080,
 190   BFD_MACH_O_MH_FORCE_FLAT              = 0x000100,
 191   BFD_MACH_O_MH_NOMULTIDEFS             = 0x000200,
 192   BFD_MACH_O_MH_NOFIXPREBINDING         = 0x000400,
 193   BFD_MACH_O_MH_PREBINDABLE             = 0x000800,
 194   BFD_MACH_O_MH_ALLMODSBOUND            = 0x001000,
 195   BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x002000,
 196   BFD_MACH_O_MH_CANONICAL               = 0x004000,
 197   BFD_MACH_O_MH_WEAK_DEFINES            = 0x008000,
 198   BFD_MACH_O_MH_BINDS_TO_WEAK           = 0x010000,
 199   BFD_MACH_O_MH_ALLOW_STACK_EXECUTION   = 0x020000,
 200   BFD_MACH_O_MH_ROOT_SAFE               = 0x040000,
 201   BFD_MACH_O_MH_SETUID_SAFE             = 0x080000,
 202   BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS    = 0x100000,
 203   BFD_MACH_O_MH_PIE                     = 0x200000
 204 }
 205 bfd_mach_o_header_flags;
 206
 207 /* Constants for the type of a section.  */
 208
 209 typedef enum bfd_mach_o_section_type
 210 {
 211   /* Regular section.  */
 212   BFD_MACH_O_S_REGULAR = 0x0,
 213
 214   /* Zero fill on demand section.  */
 215   BFD_MACH_O_S_ZEROFILL = 0x1,
 216
 217   /* Section with only literal C strings.  */
 218   BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
 219
 220   /* Section with only 4 byte literals.  */
 221   BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
 222
 223   /* Section with only 8 byte literals.  */
 224   BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
 225
 226   /* Section with only pointers to literals.  */
 227   BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
 228
 229   /* For the two types of symbol pointers sections and the symbol stubs
 230      section they have indirect symbol table entries.  For each of the
 231      entries in the section the indirect symbol table entries, in
 232      corresponding order in the indirect symbol table, start at the index
 233      stored in the reserved1 field of the section structure.  Since the
 234      indirect symbol table entries correspond to the entries in the
 235      section the number of indirect symbol table entries is inferred from
 236      the size of the section divided by the size of the entries in the
 237      section.  For symbol pointers sections the size of the entries in
 238      the section is 4 bytes and for symbol stubs sections the byte size
 239      of the stubs is stored in the reserved2 field of the section
 240      structure.  */
 241
 242   /* Section with only non-lazy symbol pointers.  */
 243   BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
 244
 245   /* Section with only lazy symbol pointers.  */
 246   BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
 247
 248   /* Section with only symbol stubs, byte size of stub in the reserved2
 249      field.  */
 250   BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
 251
 252   /* Section with only function pointers for initialization.  */
 253   BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
 254
 255   /* Section with only function pointers for termination.  */
 256   BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
 257
 258   /* Section contains symbols that are coalesced by the linkers.  */
 259   BFD_MACH_O_S_COALESCED = 0xb,
 260
 261   /* Zero fill on demand section (possibly larger than 4 GB).  */
 262   BFD_MACH_O_S_GB_ZEROFILL = 0xc,
 263
 264   /* Section with only pairs of function pointers for interposing.  */
 265   BFD_MACH_O_S_INTERPOSING = 0xd,
 266
 267   /* Section with only 16 byte literals.  */
 268   BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
 269
 270   /* Section contains DTrace Object Format.  */
 271   BFD_MACH_O_S_DTRACE_DOF = 0xf,
 272
 273   /* Section with only lazy symbol pointers to lazy loaded dylibs.  */
 274   BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
 275 }
 276 bfd_mach_o_section_type;
 277
 278 /* The flags field of a section structure is separated into two parts a section
 279    type and section attributes.  The section types are mutually exclusive (it
 280    can only have one type) but the section attributes are not (it may have more
 281    than one attribute).  */
 282
 283 #define BFD_MACH_O_SECTION_TYPE_MASK        0x000000ff
 284
 285 /* Constants for the section attributes part of the flags field of a section
 286    structure.  */
 287 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK  0xffffff00
 288 /* System setable attributes.  */
 289 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS   0x00ffff00
 290 /* User attributes.  */
 291 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR   0xff000000
 292
 293 typedef enum bfd_mach_o_section_attribute
 294 {
 295   /* Section has local relocation entries.  */
 296   BFD_MACH_O_S_ATTR_LOC_RELOC         = 0x00000100,
 297
 298   /* Section has external relocation entries.  */
 299   BFD_MACH_O_S_ATTR_EXT_RELOC         = 0x00000200,
 300
 301   /* Section contains some machine instructions.  */
 302   BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
 303
 304   /* A debug section.  */
 305   BFD_MACH_O_S_ATTR_DEBUG             = 0x02000000,
 306
 307   /* Used with i386 stubs.  */
 308   BFD_MACH_O_S_SELF_MODIFYING_CODE    = 0x04000000,
 309
 310   /* Blocks are live if they reference live blocks.  */
 311   BFD_MACH_O_S_ATTR_LIVE_SUPPORT      = 0x08000000,
 312
 313   /* No dead stripping.  */
 314   BFD_MACH_O_S_ATTR_NO_DEAD_STRIP     = 0x10000000,
 315
 316   /* Section symbols can be stripped in files with MH_DYLDLINK flag.  */
 317   BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
 318
 319   /* Section contains coalesced symbols that are not to be in the TOC of an
 320      archive.  */
 321   BFD_MACH_O_S_ATTR_NO_TOC            = 0x40000000,
 322
 323   /* Section contains only true machine instructions.  */
 324   BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000
 325 }
 326 bfd_mach_o_section_attribute;
 327
 328 typedef struct bfd_mach_o_header
 329 {
 330   unsigned long magic;
 331   unsigned long cputype;
 332   unsigned long cpusubtype;
 333   unsigned long filetype;
 334   unsigned long ncmds;
 335   unsigned long sizeofcmds;
 336   unsigned long flags;
 337   unsigned int reserved;
 338   /* Version 1: 32 bits, version 2: 64 bits.  */
 339   unsigned int version;
 340   enum bfd_endian byteorder;
 341 }
 342 bfd_mach_o_header;
 343
 344 #define BFD_MACH_O_HEADER_SIZE 28
 345 #define BFD_MACH_O_HEADER_64_SIZE 32
 346
 347 typedef struct bfd_mach_o_section
 348 {
 349   asection *bfdsection;
 350   char sectname[16 + 1];
 351   char segname[16 + 1];
 352   bfd_vma addr;
 353   bfd_vma size;
 354   bfd_vma offset;
 355   unsigned long align;
 356   bfd_vma reloff;
 357   unsigned long nreloc;
 358   unsigned long flags;
 359   unsigned long reserved1;
 360   unsigned long reserved2;
 361   unsigned long reserved3;
 362 }
 363 bfd_mach_o_section;
 364 #define BFD_MACH_O_SECTION_SIZE 68
 365 #define BFD_MACH_O_SECTION_64_SIZE 80
 366
 367 typedef struct bfd_mach_o_segment_command
 368 {
 369   char segname[16 + 1];
 370   bfd_vma vmaddr;
 371   bfd_vma vmsize;
 372   bfd_vma fileoff;
 373   unsigned long filesize;
 374   unsigned long maxprot;        /* Maximum permitted protection.  */
 375   unsigned long initprot;       /* Initial protection.  */
 376   unsigned long nsects;
 377   unsigned long flags;
 378   bfd_mach_o_section *sections;
 379 }
 380 bfd_mach_o_segment_command;
 381 #define BFD_MACH_O_LC_SEGMENT_SIZE 56
 382 #define BFD_MACH_O_LC_SEGMENT_64_SIZE 72
 383
 384 /* Protection flags.  */
 385 #define BFD_MACH_O_PROT_READ    0x01
 386 #define BFD_MACH_O_PROT_WRITE   0x02
 387 #define BFD_MACH_O_PROT_EXECUTE 0x04
 388
 389 /* Generic relocation types (used by i386).  */
 390 #define BFD_MACH_O_GENERIC_RELOC_VANILLA        0
 391 #define BFD_MACH_O_GENERIC_RELOC_PAIR           1
 392 #define BFD_MACH_O_GENERIC_RELOC_SECTDIFF       2
 393 #define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR      3
 394 #define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
 395
 396 /* Size of a relocation entry.  */
 397 #define BFD_MACH_O_RELENT_SIZE 8
 398
 399 /* Fields for a normal (non-scattered) entry.  */
 400 #define BFD_MACH_O_R_PCREL              0x01000000
 401 #define BFD_MACH_O_GET_R_LENGTH(s)      (((s) >> 25) & 0x3)
 402 #define BFD_MACH_O_R_EXTERN             0x08000000
 403 #define BFD_MACH_O_GET_R_TYPE(s)        (((s) >> 28) & 0x0f)
 404 #define BFD_MACH_O_GET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 405 #define BFD_MACH_O_SET_R_LENGTH(l)      (((l) & 0x3) << 25)
 406 #define BFD_MACH_O_SET_R_TYPE(t)        (((t) & 0xf) << 28)
 407 #define BFD_MACH_O_SET_R_SYMBOLNUM(s)   ((s) & 0x00ffffff)
 408
 409 /* Fields for a scattered entry.  */
 410 #define BFD_MACH_O_SR_SCATTERED         0x80000000
 411 #define BFD_MACH_O_SR_PCREL             0x40000000
 412 #define BFD_MACH_O_GET_SR_LENGTH(s)     (((s) >> 28) & 0x3)
 413 #define BFD_MACH_O_GET_SR_TYPE(s)       (((s) >> 24) & 0x0f)
 414 #define BFD_MACH_O_GET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 415 #define BFD_MACH_O_SET_SR_LENGTH(l)     (((l) & 0x3) << 28)
 416 #define BFD_MACH_O_SET_SR_TYPE(t)       (((t) & 0xf) << 24)
 417 #define BFD_MACH_O_SET_SR_ADDRESS(s)    ((s) & 0x00ffffff)
 418
 419 /* Expanded internal representation of a relocation entry.  */
 420 typedef struct bfd_mach_o_reloc_info
 421 {
 422   bfd_vma r_address;
 423   bfd_vma r_value;
 424   unsigned int r_scattered : 1;
 425   unsigned int r_type : 4;
 426   unsigned int r_pcrel : 1;
 427   unsigned int r_length : 2;
 428   unsigned int r_extern : 1;
 429 }
 430 bfd_mach_o_reloc_info;
 431
 432 typedef struct bfd_mach_o_asymbol
 433 {
 434   /* The actual symbol which the rest of BFD works with.  */
 435   asymbol symbol;
 436
 437   /* Fields from Mach-O symbol.  */
 438   unsigned char n_type;
 439   unsigned char n_sect;
 440   unsigned short n_desc;
 441 }
 442 bfd_mach_o_asymbol;
 443 #define BFD_MACH_O_NLIST_SIZE 12
 444 #define BFD_MACH_O_NLIST_64_SIZE 16
 445
 446 typedef struct bfd_mach_o_symtab_command
 447 {
 448   unsigned int symoff;
 449   unsigned int nsyms;
 450   unsigned int stroff;
 451   unsigned int strsize;
 452   bfd_mach_o_asymbol *symbols;
 453   char *strtab;
 454 }
 455 bfd_mach_o_symtab_command;
 456
 457 /* This is the second set of the symbolic information which is used to support
 458    the data structures for the dynamically link editor.
 459
 460    The original set of symbolic information in the symtab_command which contains
 461    the symbol and string tables must also be present when this load command is
 462    present.  When this load command is present the symbol table is organized
 463    into three groups of symbols:
 464        local symbols (static and debugging symbols) - grouped by module
 465        defined external symbols - grouped by module (sorted by name if not lib)
 466        undefined external symbols (sorted by name)
 467    In this load command there are offsets and counts to each of the three groups
 468    of symbols.
 469
 470    This load command contains a the offsets and sizes of the following new
 471    symbolic information tables:
 472        table of contents
 473        module table
 474        reference symbol table
 475        indirect symbol table
 476    The first three tables above (the table of contents, module table and
 477    reference symbol table) are only present if the file is a dynamically linked
 478    shared library.  For executable and object modules, which are files
 479    containing only one module, the information that would be in these three
 480    tables is determined as follows:
 481        table of contents - the defined external symbols are sorted by name
 482        module table - the file contains only one module so everything in the
 483                       file is part of the module.
 484        reference symbol table - is the defined and undefined external symbols
 485
 486    For dynamically linked shared library files this load command also contains
 487    offsets and sizes to the pool of relocation entries for all sections
 488    separated into two groups:
 489        external relocation entries
 490        local relocation entries
 491    For executable and object modules the relocation entries continue to hang
 492    off the section structures.  */
 493
 494 typedef struct bfd_mach_o_dylib_module
 495 {
 496   /* Index into the string table indicating the name of the module.  */
 497   unsigned long module_name_idx;
 498   char *module_name;
 499
 500   /* Index into the symbol table of the first defined external symbol provided
 501      by the module.  */
 502   unsigned long iextdefsym;
 503
 504   /* Number of external symbols provided by this module.  */
 505   unsigned long nextdefsym;
 506
 507   /* Index into the external reference table of the first entry
 508      provided by this module.  */
 509   unsigned long irefsym;
 510
 511   /* Number of external reference entries provided by this module.  */
 512   unsigned long nrefsym;
 513
 514   /* Index into the symbol table of the first local symbol provided by this
 515      module.  */
 516   unsigned long ilocalsym;
 517
 518   /* Number of local symbols provided by this module.  */
 519   unsigned long nlocalsym;
 520
 521   /* Index into the external relocation table of the first entry provided
 522      by this module.  */
 523   unsigned long iextrel;
 524
 525   /* Number of external relocation entries provided by this module.  */
 526   unsigned long nextrel;
 527
 528   /* Index in the module initialization section to the pointers for this
 529      module.  */
 530   unsigned short iinit;
 531
 532   /* Index in the module termination section to the pointers for this
 533      module.  */
 534   unsigned short iterm;
 535
 536   /* Number of pointers in the module initialization for this module.  */
 537   unsigned short ninit;
 538
 539   /* Number of pointers in the module termination for this module.  */
 540   unsigned short nterm;
 541
 542   /* Number of data byte for this module that are used in the __module_info
 543      section of the __OBJC segment.  */
 544   unsigned long objc_module_info_size;
 545
 546   /* Statically linked address of the start of the data for this module
 547      in the __module_info section of the __OBJC_segment.  */
 548   bfd_vma objc_module_info_addr;
 549 }
 550 bfd_mach_o_dylib_module;
 551 #define BFD_MACH_O_DYLIB_MODULE_SIZE 52
 552 #define BFD_MACH_O_DYLIB_MODULE_64_SIZE 56
 553
 554 typedef struct bfd_mach_o_dylib_table_of_content
 555 {
 556   /* Index into the symbol table to the defined external symbol.  */
 557   unsigned long symbol_index;
 558
 559   /* Index into the module table to the module for this entry.  */
 560   unsigned long module_index;
 561 }
 562 bfd_mach_o_dylib_table_of_content;
 563 #define BFD_MACH_O_TABLE_OF_CONTENT_SIZE 8
 564
 565 typedef struct bfd_mach_o_dylib_reference
 566 {
 567   /* Index into the symbol table for the symbol being referenced.  */
 568   unsigned long isym;
 569
 570   /* Type of the reference being made (use REFERENCE_FLAGS constants).  */
 571   unsigned long flags;
 572 }
 573 bfd_mach_o_dylib_reference;
 574 #define BFD_MACH_O_REFERENCE_SIZE 4
 575
 576 typedef struct bfd_mach_o_dysymtab_command
 577 {
 578   /* The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
 579      are grouped into the following three groups:
 580        local symbols (further grouped by the module they are from)
 581        defined external symbols (further grouped by the module they are from)
 582        undefined symbols
 583
 584      The local symbols are used only for debugging.  The dynamic binding
 585      process may have to use them to indicate to the debugger the local
 586      symbols for a module that is being bound.
 587
 588      The last two groups are used by the dynamic binding process to do the
 589      binding (indirectly through the module table and the reference symbol
 590      table when this is a dynamically linked shared library file).  */
 591
 592   unsigned long ilocalsym;    /* Index to local symbols.  */
 593   unsigned long nlocalsym;    /* Number of local symbols.  */
 594   unsigned long iextdefsym;   /* Index to externally defined symbols.  */
 595   unsigned long nextdefsym;   /* Number of externally defined symbols.  */
 596   unsigned long iundefsym;    /* Index to undefined symbols.  */
 597   unsigned long nundefsym;    /* Number of undefined symbols.  */
 598
 599   /* For the for the dynamic binding process to find which module a symbol
 600      is defined in the table of contents is used (analogous to the ranlib
 601      structure in an archive) which maps defined external symbols to modules
 602      they are defined in.  This exists only in a dynamically linked shared
 603      library file.  For executable and object modules the defined external
 604      symbols are sorted by name and is use as the table of contents.  */
 605
 606   unsigned long tocoff;       /* File offset to table of contents.  */
 607   unsigned long ntoc;         /* Number of entries in table of contents.  */
 608
 609   /* To support dynamic binding of "modules" (whole object files) the symbol
 610      table must reflect the modules that the file was created from.  This is
 611      done by having a module table that has indexes and counts into the merged
 612      tables for each module.  The module structure that these two entries
 613      refer to is described below.  This exists only in a dynamically linked
 614      shared library file.  For executable and object modules the file only
 615      contains one module so everything in the file belongs to the module.  */
 616
 617   unsigned long modtaboff;    /* File offset to module table.  */
 618   unsigned long nmodtab;      /* Number of module table entries.  */
 619
 620   /* To support dynamic module binding the module structure for each module
 621      indicates the external references (defined and undefined) each module
 622      makes.  For each module there is an offset and a count into the
 623      reference symbol table for the symbols that the module references.
 624      This exists only in a dynamically linked shared library file.  For
 625      executable and object modules the defined external symbols and the
 626      undefined external symbols indicates the external references.  */
 627
 628   unsigned long extrefsymoff;  /* Offset to referenced symbol table.  */
 629   unsigned long nextrefsyms;   /* Number of referenced symbol table entries.  */
 630
 631   /* The sections that contain "symbol pointers" and "routine stubs" have
 632      indexes and (implied counts based on the size of the section and fixed
 633      size of the entry) into the "indirect symbol" table for each pointer
 634      and stub.  For every section of these two types the index into the
 635      indirect symbol table is stored in the section header in the field
 636      reserved1.  An indirect symbol table entry is simply a 32bit index into
 637      the symbol table to the symbol that the pointer or stub is referring to.
 638      The indirect symbol table is ordered to match the entries in the section.  */
 639
 640   unsigned long indirectsymoff; /* File offset to the indirect symbol table.  */
 641   unsigned long nindirectsyms;  /* Number of indirect symbol table entries.  */
 642
 643   /* To support relocating an individual module in a library file quickly the
 644      external relocation entries for each module in the library need to be
 645      accessed efficiently.  Since the relocation entries can't be accessed
 646      through the section headers for a library file they are separated into
 647      groups of local and external entries further grouped by module.  In this
 648      case the presents of this load command who's extreloff, nextrel,
 649      locreloff and nlocrel fields are non-zero indicates that the relocation
 650      entries of non-merged sections are not referenced through the section
 651      structures (and the reloff and nreloc fields in the section headers are
 652      set to zero).
 653
 654      Since the relocation entries are not accessed through the section headers
 655      this requires the r_address field to be something other than a section
 656      offset to identify the item to be relocated.  In this case r_address is
 657      set to the offset from the vmaddr of the first LC_SEGMENT command.
 658
 659      The relocation entries are grouped by module and the module table
 660      entries have indexes and counts into them for the group of external
 661      relocation entries for that the module.
 662
 663      For sections that are merged across modules there must not be any
 664      remaining external relocation entries for them (for merged sections
 665      remaining relocation entries must be local).  */
 666
 667   unsigned long extreloff;    /* Offset to external relocation entries.  */
 668   unsigned long nextrel;      /* Number of external relocation entries.  */
 669
 670   /* All the local relocation entries are grouped together (they are not
 671      grouped by their module since they are only used if the object is moved
 672      from it statically link edited address).  */
 673
 674   unsigned long locreloff;    /* Offset to local relocation entries.  */
 675   unsigned long nlocrel;      /* Number of local relocation entries.  */
 676
 677   bfd_mach_o_dylib_module *dylib_module;
 678   bfd_mach_o_dylib_table_of_content *dylib_toc;
 679   unsigned int *indirect_syms;
 680   bfd_mach_o_dylib_reference *ext_refs;
 681 }
 682 bfd_mach_o_dysymtab_command;
 683
 684 /* An indirect symbol table entry is simply a 32bit index into the symbol table
 685    to the symbol that the pointer or stub is refering to.  Unless it is for a
 686    non-lazy symbol pointer section for a defined symbol which strip(1) has
 687    removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
 688    symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.  */
 689
 690 #define BFD_MACH_O_INDIRECT_SYMBOL_LOCAL 0x80000000
 691 #define BFD_MACH_O_INDIRECT_SYMBOL_ABS   0x40000000
 692 #define BFD_MACH_O_INDIRECT_SYMBOL_SIZE  4
 693
 694 /* For LC_THREAD or LC_UNIXTHREAD.  */
 695
 696 typedef struct bfd_mach_o_thread_flavour
 697 {
 698   unsigned long flavour;
 699   unsigned long offset;
 700   unsigned long size;
 701 }
 702 bfd_mach_o_thread_flavour;
 703
 704 typedef struct bfd_mach_o_thread_command
 705 {
 706   unsigned long nflavours;
 707   bfd_mach_o_thread_flavour *flavours;
 708   asection *section;
 709 }
 710 bfd_mach_o_thread_command;
 711
 712 /* For LC_LOAD_DYLINKER and LC_ID_DYLINKER.  */
 713
 714 typedef struct bfd_mach_o_dylinker_command
 715 {
 716   unsigned long name_offset;         /* Offset to library's path name.  */
 717   unsigned long name_len;            /* Offset to library's path name.  */
 718   char *name_str;
 719 }
 720 bfd_mach_o_dylinker_command;
 721
 722 /* For LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, LC_ID_DYLIB
 723    or LC_REEXPORT_DYLIB.  */
 724
 725 typedef struct bfd_mach_o_dylib_command
 726 {
 727   unsigned long name_offset;           /* Offset to library's path name.  */
 728   unsigned long name_len;              /* Offset to library's path name.  */
 729   unsigned long timestamp;             /* Library's build time stamp.  */
 730   unsigned long current_version;       /* Library's current version number.  */
 731   unsigned long compatibility_version; /* Library's compatibility vers number.  */
 732   char *name_str;
 733 }
 734 bfd_mach_o_dylib_command;
 735
 736 /* For LC_PREBOUND_DYLIB.  */
 737
 738 typedef struct bfd_mach_o_prebound_dylib_command
 739 {
 740   unsigned long name;                /* Library's path name.  */
 741   unsigned long nmodules;            /* Number of modules in library.  */
 742   unsigned long linked_modules;      /* Bit vector of linked modules.  */
 743 }
 744 bfd_mach_o_prebound_dylib_command;
 745
 746 /* For LC_UUID.  */
 747
 748 typedef struct bfd_mach_o_uuid_command
 749 {
 750   unsigned char uuid[16];
 751   asection *section;
 752 }
 753 bfd_mach_o_uuid_command;
 754
 755 /* For LC_CODE_SIGNATURE or LC_SEGMENT_SPLIT_INFO.  */
 756
 757 typedef struct bfd_mach_o_linkedit_command
 758 {
 759   unsigned long dataoff;
 760   unsigned long datasize;
 761 }
 762 bfd_mach_o_linkedit_command;
 763
 764 typedef struct bfd_mach_o_str_command
 765 {
 766   unsigned long stroff;
 767   unsigned long str_len;
 768   char *str;
 769 }
 770 bfd_mach_o_str_command;
 771
 772 typedef struct bfd_mach_o_dyld_info_command
 773 {
 774   /* File offset and size to rebase info.  */
 775   unsigned int rebase_off;
 776   unsigned int rebase_size;
 777
 778   /* File offset and size of binding info.  */
 779   unsigned int bind_off;
 780   unsigned int bind_size;
 781
 782   /* File offset and size of weak binding info.  */
 783   unsigned int weak_bind_off;
 784   unsigned int weak_bind_size;
 785
 786   /* File offset and size of lazy binding info.  */
 787   unsigned int lazy_bind_off;
 788   unsigned int lazy_bind_size;
 789
 790   /* File offset and size of export info.  */
 791   unsigned int export_off;
 792   unsigned int export_size;
 793 }
 794 bfd_mach_o_dyld_info_command;
 795
 796 typedef struct bfd_mach_o_load_command
 797 {
 798   bfd_mach_o_load_command_type type;
 799   bfd_boolean type_required;
 800   unsigned int offset;
 801   unsigned int len;
 802   union
 803   {
 804     bfd_mach_o_segment_command segment;
 805     bfd_mach_o_symtab_command symtab;
 806     bfd_mach_o_dysymtab_command dysymtab;
 807     bfd_mach_o_thread_command thread;
 808     bfd_mach_o_dylib_command dylib;
 809     bfd_mach_o_dylinker_command dylinker;
 810     bfd_mach_o_prebound_dylib_command prebound_dylib;
 811     bfd_mach_o_uuid_command uuid;
 812     bfd_mach_o_linkedit_command linkedit;
 813     bfd_mach_o_str_command str;
 814     bfd_mach_o_dyld_info_command dyld_info;
 815   }
 816   command;
 817 }
 818 bfd_mach_o_load_command;
 819
 820 typedef struct mach_o_data_struct
 821 {
 822   /* Mach-O header.  */
 823   bfd_mach_o_header header;
 824   /* Array of load commands (length is given by header.ncmds).  */
 825   bfd_mach_o_load_command *commands;
 826
 827   /* Flatten array of sections.  The array is 0-based.  */
 828   unsigned long nsects;
 829   bfd_mach_o_section **sections;
 830
 831   /* Used while writting: current length of the output file.  This is used
 832      to allocate space in the file.  */
 833   ufile_ptr filelen;
 834
 835   /* As symtab is referenced by other load command, it is handy to have
 836      a direct access to it.  Also it is not clearly stated, only one symtab
 837      is expected.  */
 838   bfd_mach_o_symtab_command *symtab;
 839   bfd_mach_o_dysymtab_command *dysymtab;
 840 }
 841 bfd_mach_o_data_struct;
 842
 843 /* Target specific routines.  */
 844 typedef struct bfd_mach_o_backend_data
 845 {
 846   bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
 847   bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
 848   bfd_boolean (*_bfd_mach_o_print_thread)(bfd *, bfd_mach_o_thread_flavour *,
 849                                           void *, char *);
 850 }
 851 bfd_mach_o_backend_data;
 852
 853 #define bfd_mach_o_get_data(abfd) ((abfd)->tdata.mach_o_data)
 854 #define bfd_mach_o_get_backend_data(abfd) \
 855   ((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
 856
 857 bfd_boolean bfd_mach_o_valid (bfd *);
 858 int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, bfd_mach_o_asymbol *, unsigned long);
 859 int bfd_mach_o_scan_start_address (bfd *);
 860 int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *);
 861 bfd_boolean bfd_mach_o_mkobject_init (bfd *);
 862 const bfd_target *bfd_mach_o_object_p (bfd *);
 863 const bfd_target *bfd_mach_o_core_p (bfd *);
 864 const bfd_target *bfd_mach_o_archive_p (bfd *);
 865 bfd *bfd_mach_o_openr_next_archived_file (bfd *, bfd *);
 866 int bfd_mach_o_lookup_section (bfd *, asection *, bfd_mach_o_load_command **, bfd_mach_o_section **);
 867 int bfd_mach_o_lookup_command (bfd *, bfd_mach_o_load_command_type, bfd_mach_o_load_command **);
 868 bfd_boolean bfd_mach_o_write_contents (bfd *);
 869 bfd_boolean bfd_mach_o_bfd_copy_private_symbol_data (bfd *, asymbol *,
 870                                                      bfd *, asymbol *);
 871 bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
 872                                                       bfd *, asection *);
 873 bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
 874 long bfd_mach_o_get_symtab_upper_bound (bfd *);
 875 long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
 876 long bfd_mach_o_get_reloc_upper_bound (bfd *, asection *);
 877 long bfd_mach_o_canonicalize_reloc (bfd *, asection *, arelent **, asymbol **);
 878 long bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *);
 879 long bfd_mach_o_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **);
 880 asymbol *bfd_mach_o_make_empty_symbol (bfd *);
 881 void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
 882 void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);
 883 bfd_boolean bfd_mach_o_bfd_print_private_bfd_data (bfd *, PTR);
 884 int bfd_mach_o_sizeof_headers (bfd *, struct bfd_link_info *);
 885 unsigned long bfd_mach_o_stack_addr (enum bfd_mach_o_cpu_type);
 886 int bfd_mach_o_core_fetch_environment (bfd *, unsigned char **, unsigned int *);
 887 char *bfd_mach_o_core_file_failing_command (bfd *);
 888 int bfd_mach_o_core_file_failing_signal (bfd *);
 889 bfd_boolean bfd_mach_o_core_file_matches_executable_p (bfd *, bfd *);
 890 bfd *bfd_mach_o_fat_extract (bfd *, bfd_format , const bfd_arch_info_type *);
 891 const bfd_target *bfd_mach_o_header_p (bfd *, bfd_mach_o_filetype,
 892                                        bfd_mach_o_cpu_type);
 893 bfd_boolean bfd_mach_o_build_commands (bfd *);
 894 bfd_boolean bfd_mach_o_set_section_contents (bfd *, asection *, const void *,
 895                                              file_ptr, bfd_size_type);
 896 unsigned int bfd_mach_o_version (bfd *);
 897
 898 extern const bfd_target mach_o_fat_vec;
 899
 900 #endif /* _BFD_MACH_O_H_ */