include/mach-o/loader.h

   1 /* Mach-O support for BFD.
   2    Copyright 2011, 2012
   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 _MACH_O_LOADER_H
  23 #define _MACH_O_LOADER_H
  24
  25 /* Constants for header. */
  26
  27 typedef enum bfd_mach_o_mach_header_magic
  28 {
  29   BFD_MACH_O_MH_MAGIC    = 0xfeedface,
  30   BFD_MACH_O_MH_CIGAM    = 0xcefaedfe,
  31   BFD_MACH_O_MH_MAGIC_64 = 0xfeedfacf,
  32   BFD_MACH_O_MH_CIGAM_64 = 0xcffaedfe
  33 }
  34 bfd_mach_o_mach_header_magic;
  35
  36 #define BFD_MACH_O_CPU_IS64BIT 0x1000000
  37
  38 typedef enum bfd_mach_o_cpu_type
  39 {
  40   BFD_MACH_O_CPU_TYPE_VAX = 1,
  41   BFD_MACH_O_CPU_TYPE_MC680x0 = 6,
  42   BFD_MACH_O_CPU_TYPE_I386 = 7,
  43   BFD_MACH_O_CPU_TYPE_MIPS = 8,
  44   BFD_MACH_O_CPU_TYPE_MC98000 = 10,
  45   BFD_MACH_O_CPU_TYPE_HPPA = 11,
  46   BFD_MACH_O_CPU_TYPE_ARM = 12,
  47   BFD_MACH_O_CPU_TYPE_MC88000 = 13,
  48   BFD_MACH_O_CPU_TYPE_SPARC = 14,
  49   BFD_MACH_O_CPU_TYPE_I860 = 15,
  50   BFD_MACH_O_CPU_TYPE_ALPHA = 16,
  51   BFD_MACH_O_CPU_TYPE_POWERPC = 18,
  52   BFD_MACH_O_CPU_TYPE_POWERPC_64 = (BFD_MACH_O_CPU_TYPE_POWERPC | BFD_MACH_O_CPU_IS64BIT),
  53   BFD_MACH_O_CPU_TYPE_X86_64 = (BFD_MACH_O_CPU_TYPE_I386 | BFD_MACH_O_CPU_IS64BIT)
  54 }
  55 bfd_mach_o_cpu_type;
  56
  57 typedef enum bfd_mach_o_cpu_subtype
  58 {
  59   /* i386.  */
  60   BFD_MACH_O_CPU_SUBTYPE_X86_ALL = 3,
  61
  62   /* arm.  */
  63   BFD_MACH_O_CPU_SUBTYPE_ARM_ALL = 0,
  64   BFD_MACH_O_CPU_SUBTYPE_ARM_V4T = 5,
  65   BFD_MACH_O_CPU_SUBTYPE_ARM_V6 = 6,
  66   BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ = 7,
  67   BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE = 8,
  68   BFD_MACH_O_CPU_SUBTYPE_ARM_V7 = 9
  69 }
  70 bfd_mach_o_cpu_subtype;
  71
  72 typedef enum bfd_mach_o_filetype
  73 {
  74   BFD_MACH_O_MH_OBJECT      = 0x01,
  75   BFD_MACH_O_MH_EXECUTE     = 0x02,
  76   BFD_MACH_O_MH_FVMLIB      = 0x03,
  77   BFD_MACH_O_MH_CORE        = 0x04,
  78   BFD_MACH_O_MH_PRELOAD     = 0x05,
  79   BFD_MACH_O_MH_DYLIB       = 0x06,
  80   BFD_MACH_O_MH_DYLINKER    = 0x07,
  81   BFD_MACH_O_MH_BUNDLE      = 0x08,
  82   BFD_MACH_O_MH_DYLIB_STUB  = 0x09,
  83   BFD_MACH_O_MH_DSYM        = 0x0a,
  84   BFD_MACH_O_MH_KEXT_BUNDLE = 0x0b
  85 }
  86 bfd_mach_o_filetype;
  87
  88 typedef enum bfd_mach_o_header_flags
  89 {
  90   BFD_MACH_O_MH_NOUNDEFS                = 0x0000001,
  91   BFD_MACH_O_MH_INCRLINK                = 0x0000002,
  92   BFD_MACH_O_MH_DYLDLINK                = 0x0000004,
  93   BFD_MACH_O_MH_BINDATLOAD              = 0x0000008,
  94   BFD_MACH_O_MH_PREBOUND                = 0x0000010,
  95   BFD_MACH_O_MH_SPLIT_SEGS              = 0x0000020,
  96   BFD_MACH_O_MH_LAZY_INIT               = 0x0000040,
  97   BFD_MACH_O_MH_TWOLEVEL                = 0x0000080,
  98   BFD_MACH_O_MH_FORCE_FLAT              = 0x0000100,
  99   BFD_MACH_O_MH_NOMULTIDEFS             = 0x0000200,
 100   BFD_MACH_O_MH_NOFIXPREBINDING         = 0x0000400,
 101   BFD_MACH_O_MH_PREBINDABLE             = 0x0000800,
 102   BFD_MACH_O_MH_ALLMODSBOUND            = 0x0001000,
 103   BFD_MACH_O_MH_SUBSECTIONS_VIA_SYMBOLS = 0x0002000,
 104   BFD_MACH_O_MH_CANONICAL               = 0x0004000,
 105   BFD_MACH_O_MH_WEAK_DEFINES            = 0x0008000,
 106   BFD_MACH_O_MH_BINDS_TO_WEAK           = 0x0010000,
 107   BFD_MACH_O_MH_ALLOW_STACK_EXECUTION   = 0x0020000,
 108   BFD_MACH_O_MH_ROOT_SAFE               = 0x0040000,
 109   BFD_MACH_O_MH_SETUID_SAFE             = 0x0080000,
 110   BFD_MACH_O_MH_NO_REEXPORTED_DYLIBS    = 0x0100000,
 111   BFD_MACH_O_MH_PIE                     = 0x0200000,
 112   BFD_MACH_O_MH_DEAD_STRIPPABLE_DYLIB   = 0x0400000,
 113   BFD_MACH_O_MH_HAS_TLV_DESCRIPTORS     = 0x0800000,
 114   BFD_MACH_O_MH_NO_HEAP_EXECUTION       = 0x1000000
 115 }
 116 bfd_mach_o_header_flags;
 117 \f
 118 /* Load command constants.  */
 119 #define BFD_MACH_O_LC_REQ_DYLD 0x80000000
 120
 121 typedef enum bfd_mach_o_load_command_type
 122 {
 123   BFD_MACH_O_LC_SEGMENT = 0x1,          /* File segment to be mapped.  */
 124   BFD_MACH_O_LC_SYMTAB = 0x2,           /* Link-edit stab symbol table info (obsolete).  */
 125   BFD_MACH_O_LC_SYMSEG = 0x3,           /* Link-edit gdb symbol table info.  */
 126   BFD_MACH_O_LC_THREAD = 0x4,           /* Thread.  */
 127   BFD_MACH_O_LC_UNIXTHREAD = 0x5,       /* UNIX thread (includes a stack).  */
 128   BFD_MACH_O_LC_LOADFVMLIB = 0x6,       /* Load a fixed VM shared library.  */
 129   BFD_MACH_O_LC_IDFVMLIB = 0x7,         /* Fixed VM shared library id.  */
 130   BFD_MACH_O_LC_IDENT = 0x8,            /* Object identification information (obsolete).  */
 131   BFD_MACH_O_LC_FVMFILE = 0x9,          /* Fixed VM file inclusion.  */
 132   BFD_MACH_O_LC_PREPAGE = 0xa,          /* Prepage command (internal use).  */
 133   BFD_MACH_O_LC_DYSYMTAB = 0xb,         /* Dynamic link-edit symbol table info.  */
 134   BFD_MACH_O_LC_LOAD_DYLIB = 0xc,       /* Load a dynamically linked shared library.  */
 135   BFD_MACH_O_LC_ID_DYLIB = 0xd,         /* Dynamically linked shared lib identification.  */
 136   BFD_MACH_O_LC_LOAD_DYLINKER = 0xe,    /* Load a dynamic linker.  */
 137   BFD_MACH_O_LC_ID_DYLINKER = 0xf,      /* Dynamic linker identification.  */
 138   BFD_MACH_O_LC_PREBOUND_DYLIB = 0x10,  /* Modules prebound for a dynamically.  */
 139   BFD_MACH_O_LC_ROUTINES = 0x11,        /* Image routines.  */
 140   BFD_MACH_O_LC_SUB_FRAMEWORK = 0x12,   /* Sub framework.  */
 141   BFD_MACH_O_LC_SUB_UMBRELLA = 0x13,    /* Sub umbrella.  */
 142   BFD_MACH_O_LC_SUB_CLIENT = 0x14,      /* Sub client.  */
 143   BFD_MACH_O_LC_SUB_LIBRARY = 0x15,     /* Sub library.  */
 144   BFD_MACH_O_LC_TWOLEVEL_HINTS = 0x16,  /* Two-level namespace lookup hints.  */
 145   BFD_MACH_O_LC_PREBIND_CKSUM = 0x17,   /* Prebind checksum.  */
 146   /* Load a dynamically linked shared library that is allowed to be
 147        missing (weak).  */
 148   BFD_MACH_O_LC_LOAD_WEAK_DYLIB = 0x18,
 149   BFD_MACH_O_LC_SEGMENT_64 = 0x19,      /* 64-bit segment of this file to be
 150                                            mapped.  */
 151   BFD_MACH_O_LC_ROUTINES_64 = 0x1a,     /* Address of the dyld init routine
 152                                            in a dylib.  */
 153   BFD_MACH_O_LC_UUID = 0x1b,            /* 128-bit UUID of the executable.  */
 154   BFD_MACH_O_LC_RPATH = 0x1c,           /* Run path addiions.  */
 155   BFD_MACH_O_LC_CODE_SIGNATURE = 0x1d,  /* Local of code signature.  */
 156   BFD_MACH_O_LC_SEGMENT_SPLIT_INFO = 0x1e, /* Local of info to split seg.  */
 157   BFD_MACH_O_LC_REEXPORT_DYLIB = 0x1f,  /* Load and re-export lib.  */
 158   BFD_MACH_O_LC_LAZY_LOAD_DYLIB = 0x20, /* Delay load of lib until use.  */
 159   BFD_MACH_O_LC_ENCRYPTION_INFO = 0x21, /* Encrypted segment info.  */
 160   BFD_MACH_O_LC_DYLD_INFO = 0x22,       /* Compressed dyld information.  */
 161   BFD_MACH_O_LC_LOAD_UPWARD_DYLIB = 0x23, /* Load upward dylib.  */
 162   BFD_MACH_O_LC_VERSION_MIN_MACOSX = 0x24,   /* Minimal MacOSX version.  */
 163   BFD_MACH_O_LC_VERSION_MIN_IPHONEOS = 0x25, /* Minimal IOS version.  */
 164   BFD_MACH_O_LC_FUNCTION_STARTS = 0x26,  /* Compressed table of func start.  */
 165   BFD_MACH_O_LC_DYLD_ENVIRONMENT = 0x27  /* Env variable string for dyld.  */
 166 }
 167 bfd_mach_o_load_command_type;
 168 \f
 169 /* Section constants.  */
 170 /* Constants for the type of a section.  */
 171
 172 typedef enum bfd_mach_o_section_type
 173 {
 174   /* Regular section.  */
 175   BFD_MACH_O_S_REGULAR = 0x0,
 176
 177   /* Zero fill on demand section.  */
 178   BFD_MACH_O_S_ZEROFILL = 0x1,
 179
 180   /* Section with only literal C strings.  */
 181   BFD_MACH_O_S_CSTRING_LITERALS = 0x2,
 182
 183   /* Section with only 4 byte literals.  */
 184   BFD_MACH_O_S_4BYTE_LITERALS = 0x3,
 185
 186   /* Section with only 8 byte literals.  */
 187   BFD_MACH_O_S_8BYTE_LITERALS = 0x4,
 188
 189   /* Section with only pointers to literals.  */
 190   BFD_MACH_O_S_LITERAL_POINTERS = 0x5,
 191
 192   /* For the two types of symbol pointers sections and the symbol stubs
 193      section they have indirect symbol table entries.  For each of the
 194      entries in the section the indirect symbol table entries, in
 195      corresponding order in the indirect symbol table, start at the index
 196      stored in the reserved1 field of the section structure.  Since the
 197      indirect symbol table entries correspond to the entries in the
 198      section the number of indirect symbol table entries is inferred from
 199      the size of the section divided by the size of the entries in the
 200      section.  For symbol pointers sections the size of the entries in
 201      the section is 4 bytes and for symbol stubs sections the byte size
 202      of the stubs is stored in the reserved2 field of the section
 203      structure.  */
 204
 205   /* Section with only non-lazy symbol pointers.  */
 206   BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS = 0x6,
 207
 208   /* Section with only lazy symbol pointers.  */
 209   BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
 210
 211   /* Section with only symbol stubs, byte size of stub in the reserved2
 212      field.  */
 213   BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
 214
 215   /* Section with only function pointers for initialization.  */
 216   BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
 217
 218   /* Section with only function pointers for termination.  */
 219   BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
 220
 221   /* Section contains symbols that are coalesced by the linkers.  */
 222   BFD_MACH_O_S_COALESCED = 0xb,
 223
 224   /* Zero fill on demand section (possibly larger than 4 GB).  */
 225   BFD_MACH_O_S_GB_ZEROFILL = 0xc,
 226
 227   /* Section with only pairs of function pointers for interposing.  */
 228   BFD_MACH_O_S_INTERPOSING = 0xd,
 229
 230   /* Section with only 16 byte literals.  */
 231   BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
 232
 233   /* Section contains DTrace Object Format.  */
 234   BFD_MACH_O_S_DTRACE_DOF = 0xf,
 235
 236   /* Section with only lazy symbol pointers to lazy loaded dylibs.  */
 237   BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
 238 }
 239 bfd_mach_o_section_type;
 240
 241 /* The flags field of a section structure is separated into two parts a section
 242    type and section attributes.  The section types are mutually exclusive (it
 243    can only have one type) but the section attributes are not (it may have more
 244    than one attribute).  */
 245
 246 #define BFD_MACH_O_SECTION_TYPE_MASK        0x000000ff
 247
 248 /* Constants for the section attributes part of the flags field of a section
 249    structure.  */
 250 #define BFD_MACH_O_SECTION_ATTRIBUTES_MASK  0xffffff00
 251 /* System setable attributes.  */
 252 #define BFD_MACH_O_SECTION_ATTRIBUTES_SYS   0x00ffff00
 253 /* User attributes.  */
 254 #define BFD_MACH_O_SECTION_ATTRIBUTES_USR   0xff000000
 255
 256 typedef enum bfd_mach_o_section_attribute
 257 {
 258   /* Section has no specified attibutes.  */
 259   BFD_MACH_O_S_ATTR_NONE              = 0,
 260
 261   /* Section has local relocation entries.  */
 262   BFD_MACH_O_S_ATTR_LOC_RELOC         = 0x00000100,
 263
 264   /* Section has external relocation entries.  */
 265   BFD_MACH_O_S_ATTR_EXT_RELOC         = 0x00000200,
 266
 267   /* Section contains some machine instructions.  */
 268   BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
 269
 270   /* A debug section.  */
 271   BFD_MACH_O_S_ATTR_DEBUG             = 0x02000000,
 272
 273   /* Used with i386 stubs.  */
 274   BFD_MACH_O_S_SELF_MODIFYING_CODE    = 0x04000000,
 275
 276   /* Blocks are live if they reference live blocks.  */
 277   BFD_MACH_O_S_ATTR_LIVE_SUPPORT      = 0x08000000,
 278
 279   /* No dead stripping.  */
 280   BFD_MACH_O_S_ATTR_NO_DEAD_STRIP     = 0x10000000,
 281
 282   /* Section symbols can be stripped in files with MH_DYLDLINK flag.  */
 283   BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
 284
 285   /* Section contains coalesced symbols that are not to be in the TOC of an
 286      archive.  */
 287   BFD_MACH_O_S_ATTR_NO_TOC            = 0x40000000,
 288
 289   /* Section contains only true machine instructions.  */
 290   BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS = 0x80000000
 291 }
 292 bfd_mach_o_section_attribute;
 293 \f
 294 /* Symbol constants.  */
 295
 296 /* Symbol n_type values.  */
 297 #define BFD_MACH_O_N_STAB  0xe0 /* If any of these bits set, a symbolic debugging entry.  */
 298 #define BFD_MACH_O_N_PEXT  0x10 /* Private external symbol bit.  */
 299 #define BFD_MACH_O_N_TYPE  0x0e /* Mask for the type bits.  */
 300 #define BFD_MACH_O_N_EXT   0x01 /* External symbol bit, set for external symbols.  */
 301 #define BFD_MACH_O_N_UNDF  0x00 /* Undefined, n_sect == NO_SECT.  */
 302 #define BFD_MACH_O_N_ABS   0x02 /* Absolute, n_sect == NO_SECT.  */
 303 #define BFD_MACH_O_N_INDR  0x0a /* Indirect.  */
 304 #define BFD_MACH_O_N_PBUD  0x0c /* Prebound undefined (defined in a dylib).  */
 305 #define BFD_MACH_O_N_SECT  0x0e /* Defined in section number n_sect.  */
 306
 307 #define BFD_MACH_O_NO_SECT 0    /* Symbol not in any section of the image.  */
 308
 309 /* Symbol n_desc reference flags.  */
 310 #define BFD_MACH_O_REFERENCE_MASK                               0x0f
 311 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY            0x00
 312 #define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY                0x01
 313 #define BFD_MACH_O_REFERENCE_FLAG_DEFINED                       0x02
 314 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED               0x03
 315 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY    0x04
 316 #define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY        0x05
 317
 318 #define BFD_MACH_O_REFERENCED_DYNAMICALLY                       0x10
 319 #define BFD_MACH_O_N_DESC_DISCARDED                             0x20
 320 #define BFD_MACH_O_N_NO_DEAD_STRIP                              0x20
 321 #define BFD_MACH_O_N_WEAK_REF                                   0x40
 322 #define BFD_MACH_O_N_WEAK_DEF                                   0x80
 323
 324 #define BFD_MACH_O_INDIRECT_SYM_LOCAL                   0x80000000
 325 #define BFD_MACH_O_INDIRECT_SYM_ABS                     0x40000000
 326 \f
 327 /* Thread constants.  */
 328
 329 typedef enum bfd_mach_o_ppc_thread_flavour
 330 {
 331   BFD_MACH_O_PPC_THREAD_STATE      = 1,
 332   BFD_MACH_O_PPC_FLOAT_STATE       = 2,
 333   BFD_MACH_O_PPC_EXCEPTION_STATE   = 3,
 334   BFD_MACH_O_PPC_VECTOR_STATE      = 4,
 335   BFD_MACH_O_PPC_THREAD_STATE64    = 5,
 336   BFD_MACH_O_PPC_EXCEPTION_STATE64 = 6,
 337   BFD_MACH_O_PPC_THREAD_STATE_NONE = 7
 338 }
 339 bfd_mach_o_ppc_thread_flavour;
 340
 341 /* Defined in <mach/i386/thread_status.h> */
 342 typedef enum bfd_mach_o_i386_thread_flavour
 343 {
 344   BFD_MACH_O_x86_THREAD_STATE32    = 1,
 345   BFD_MACH_O_x86_FLOAT_STATE32     = 2,
 346   BFD_MACH_O_x86_EXCEPTION_STATE32 = 3,
 347   BFD_MACH_O_x86_THREAD_STATE64    = 4,
 348   BFD_MACH_O_x86_FLOAT_STATE64     = 5,
 349   BFD_MACH_O_x86_EXCEPTION_STATE64 = 6,
 350   BFD_MACH_O_x86_THREAD_STATE      = 7,
 351   BFD_MACH_O_x86_FLOAT_STATE       = 8,
 352   BFD_MACH_O_x86_EXCEPTION_STATE   = 9,
 353   BFD_MACH_O_x86_DEBUG_STATE32     = 10,
 354   BFD_MACH_O_x86_DEBUG_STATE64     = 11,
 355   BFD_MACH_O_x86_DEBUG_STATE       = 12,
 356   BFD_MACH_O_x86_THREAD_STATE_NONE = 13
 357 }
 358 bfd_mach_o_i386_thread_flavour;
 359
 360 #endif /* _MACH_O_LOADER_H */