include/llvm/Support/MachO.h

   1 //===-- llvm/Support/MachO.h - The MachO file format ------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines manifest constants for the MachO object file format.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_SUPPORT_MACHO_H
  15 #define LLVM_SUPPORT_MACHO_H
  16
  17 #include "llvm/System/DataTypes.h"
  18
  19 // NOTE: The enums in this file are intentially named to be different than those
  20 // in the headers in /usr/include/mach (on darwin systems) to avoid conflicts
  21 // with those macros.
  22 namespace llvm {
  23   namespace MachO {
  24     // Enums from <mach-o/loader.h>
  25     enum {
  26       // Constants for the "magic" field in llvm::MachO::mach_header and
  27       // llvm::MachO::mach_header_64
  28       HeaderMagic32         = 0xFEEDFACEu, // MH_MAGIC
  29       HeaderMagic32Swapped  = 0xCEFAEDFEu, // MH_CIGAM
  30       HeaderMagic64         = 0xFEEDFACFu, // MH_MAGIC_64
  31       HeaderMagic64Swapped  = 0xCFFAEDFEu, // MH_CIGAM_64
  32       UniversalMagic        = 0xCAFEBABEu, // FAT_MAGIC
  33       UniversalMagicSwapped = 0xBEBAFECAu, // FAT_CIGAM
  34
  35       // Constants for the "filetype" field in llvm::MachO::mach_header and
  36       // llvm::MachO::mach_header_64
  37       HeaderFileTypeObject              = 0x1u, // MH_OBJECT
  38       HeaderFileTypeExecutable          = 0x2u, // MH_EXECUTE
  39       HeaderFileTypeFixedVMShlib        = 0x3u, // MH_FVMLIB
  40       HeaderFileTypeCore                = 0x4u, // MH_CORE
  41       HeaderFileTypePreloadedExecutable = 0x5u, // MH_PRELOAD
  42       HeaderFileTypeDynamicShlib        = 0x6u, // MH_DYLIB
  43       HeaderFileTypeDynamicLinkEditor   = 0x7u, // MH_DYLINKER
  44       HeaderFileTypeBundle              = 0x8u, // MH_BUNDLE
  45       HeaderFileTypeDynamicShlibStub    = 0x9u, // MH_DYLIB_STUB
  46       HeaderFileTypeDSYM                = 0xAu, // MH_DSYM
  47       HeaderFileTypeKextBundle          = 0xBu, // MH_KEXT_BUNDLE
  48
  49       // Constant bits for the "flags" field in llvm::MachO::mach_header and
  50       // llvm::MachO::mach_header_64
  51       HeaderFlagBitNoUndefinedSymbols     = 0x00000001u, // MH_NOUNDEFS
  52       HeaderFlagBitIsIncrementalLinkObject= 0x00000002u, // MH_INCRLINK
  53       HeaderFlagBitIsDynamicLinkObject    = 0x00000004u, // MH_DYLDLINK
  54       HeaderFlagBitBindAtLoad             = 0x00000008u, // MH_BINDATLOAD
  55       HeaderFlagBitPrebound               = 0x00000010u, // MH_PREBOUND
  56       HeaderFlagBitSplitSegments          = 0x00000020u, // MH_SPLIT_SEGS
  57       HeaderFlagBitLazyInit               = 0x00000040u, // MH_LAZY_INIT
  58       HeaderFlagBitTwoLevelNamespace      = 0x00000080u, // MH_TWOLEVEL
  59       HeaderFlagBitForceFlatNamespace     = 0x00000100u, // MH_FORCE_FLAT
  60       HeaderFlagBitNoMultipleDefintions   = 0x00000200u, // MH_NOMULTIDEFS
  61       HeaderFlagBitNoFixPrebinding        = 0x00000400u, // MH_NOFIXPREBINDING
  62       HeaderFlagBitPrebindable            = 0x00000800u, // MH_PREBINDABLE
  63       HeaderFlagBitAllModulesBound        = 0x00001000u, // MH_ALLMODSBOUND
  64       HeaderFlagBitSubsectionsViaSymbols  = 0x00002000u, // MH_SUBSECTIONS_VIA_SYMBOLS
  65       HeaderFlagBitCanonical              = 0x00004000u, // MH_CANONICAL
  66       HeaderFlagBitWeakDefines            = 0x00008000u, // MH_WEAK_DEFINES
  67       HeaderFlagBitBindsToWeak            = 0x00010000u, // MH_BINDS_TO_WEAK
  68       HeaderFlagBitAllowStackExecution    = 0x00020000u, // MH_ALLOW_STACK_EXECUTION
  69       HeaderFlagBitRootSafe               = 0x00040000u, // MH_ROOT_SAFE
  70       HeaderFlagBitSetUIDSafe             = 0x00080000u, // MH_SETUID_SAFE
  71       HeaderFlagBitNoReexportedDylibs     = 0x00100000u, // MH_NO_REEXPORTED_DYLIBS
  72       HeaderFlagBitPIE                    = 0x00200000u, // MH_PIE
  73       HeaderFlagBitDeadStrippableDylib    = 0x00400000u, // MH_DEAD_STRIPPABLE_DYLIB
  74
  75       // Constants for the "cmd" field in llvm::MachO::load_command
  76       LoadCommandDynamicLinkerRequired    = 0x80000000u, // LC_REQ_DYLD
  77       LoadCommandSegment32                = 0x00000001u, // LC_SEGMENT
  78       LoadCommandSymtab                   = 0x00000002u, // LC_SYMTAB
  79       LoadCommandSymSeg                   = 0x00000003u, // LC_SYMSEG
  80       LoadCommandThread                   = 0x00000004u, // LC_THREAD
  81       LoadCommandUnixThread               = 0x00000005u, // LC_UNIXTHREAD
  82       LoadCommandFixedVMShlibLoad         = 0x00000006u, // LC_LOADFVMLIB
  83       LoadCommandFixedVMShlibIdent        = 0x00000007u, // LC_IDFVMLIB
  84       LoadCommandIdent                    = 0x00000008u, // LC_IDENT
  85       LoadCommandFixedVMFileInclusion     = 0x00000009u, // LC_FVMFILE
  86       LoadCommandPrePage                  = 0x0000000Au, // LC_PREPAGE
  87       LoadCommandDynamicSymtabInfo        = 0x0000000Bu, // LC_DYSYMTAB
  88       LoadCommandDylibLoad                = 0x0000000Cu, // LC_LOAD_DYLIB
  89       LoadCommandDylibIdent               = 0x0000000Du, // LC_ID_DYLIB
  90       LoadCommandDynamicLinkerLoad        = 0x0000000Eu, // LC_LOAD_DYLINKER
  91       LoadCommandDynamicLinkerIdent       = 0x0000000Fu, // LC_ID_DYLINKER
  92       LoadCommandDylibPrebound            = 0x00000010u, // LC_PREBOUND_DYLIB
  93       LoadCommandRoutines32               = 0x00000011u, // LC_ROUTINES
  94       LoadCommandSubFramework             = 0x00000012u, // LC_SUB_FRAMEWORK
  95       LoadCommandSubUmbrella              = 0x00000013u, // LC_SUB_UMBRELLA
  96       LoadCommandSubClient                = 0x00000014u, // LC_SUB_CLIENT
  97       LoadCommandSubLibrary               = 0x00000015u, // LC_SUB_LIBRARY
  98       LoadCommandTwoLevelHints            = 0x00000016u, // LC_TWOLEVEL_HINTS
  99       LoadCommandPreBindChecksum          = 0x00000017u, // LC_PREBIND_CKSUM
 100       LoadCommandDylibLoadWeak            = 0x80000018u, // LC_LOAD_WEAK_DYLIB
 101       LoadCommandSegment64                = 0x00000019u, // LC_SEGMENT_64
 102       LoadCommandRoutines64               = 0x0000001Au, // LC_ROUTINES_64
 103       LoadCommandUUID                     = 0x0000001Bu, // LC_UUID
 104       LoadCommandRunpath                  = 0x8000001Cu, // LC_RPATH
 105       LoadCommandCodeSignature            = 0x0000001Du, // LC_CODE_SIGNATURE
 106       LoadCommandSegmentSplitInfo         = 0x0000001Eu, // LC_SEGMENT_SPLIT_INFO
 107       LoadCommandDylibReexport            = 0x8000001Fu, // LC_REEXPORT_DYLIB
 108       LoadCommandDylibLazyLoad            = 0x00000020u, // LC_LAZY_LOAD_DYLIB
 109       LoadCommandEncryptionInfo           = 0x00000021u, // LC_ENCRYPTION_INFO
 110       LoadCommandDynamicLinkerInfo        = 0x00000022u, // LC_DYLD_INFO
 111       LoadCommandDynamicLinkerInfoOnly    = 0x80000022u, // LC_DYLD_INFO_ONLY
 112       LoadCommandDylibLoadUpward          = 0x80000023u, // LC_LOAD_UPWARD_DYLIB
 113
 114       // Constant bits for the "flags" field in llvm::MachO::segment_command
 115       SegmentCommandFlagBitHighVM             = 0x1u, // SG_HIGHVM
 116       SegmentCommandFlagBitFixedVMLibrary     = 0x2u, // SG_FVMLIB
 117       SegmentCommandFlagBitNoRelocations      = 0x4u, // SG_NORELOC
 118       SegmentCommandFlagBitProtectedVersion1  = 0x8u, // SG_PROTECTED_VERSION_1
 119
 120
 121       // Constant masks for the "flags" field in llvm::MachO::section and
 122       // llvm::MachO::section_64
 123       SectionFlagMaskSectionType      = 0x000000ffu, // SECTION_TYPE
 124       SectionFlagMaskAllAttributes    = 0xffffff00u, // SECTION_ATTRIBUTES
 125       SectionFlagMaskUserAttributes   = 0xff000000u, // SECTION_ATTRIBUTES_USR
 126       SectionFlagMaskSystemAttributes = 0x00ffff00u, // SECTION_ATTRIBUTES_SYS
 127
 128       // Constant masks for the "flags[7:0]" field in llvm::MachO::section and
 129       // llvm::MachO::section_64 (mask "flags" with SECTION_TYPE)
 130       SectionTypeRegular                    = 0x00u, // S_REGULAR
 131       SectionTypeZeroFill                   = 0x01u, // S_ZEROFILL
 132       SectionTypeCStringLiterals            = 0x02u, // S_CSTRING_LITERALS
 133       SectionType4ByteLiterals              = 0x03u, // S_4BYTE_LITERALS
 134       SectionType8ByteLiterals              = 0x04u, // S_8BYTE_LITERALS
 135       SectionTypeLiteralPointers            = 0x05u, // S_LITERAL_POINTERS
 136       SectionTypeNonLazySymbolPointers      = 0x06u, // S_NON_LAZY_SYMBOL_POINTERS
 137       SectionTypeLazySymbolPointers         = 0x07u, // S_LAZY_SYMBOL_POINTERS
 138       SectionTypeSymbolStubs                = 0x08u, // S_SYMBOL_STUBS
 139       SectionTypeModuleInitFunctionPointers = 0x09u, // S_MOD_INIT_FUNC_POINTERS
 140       SectionTypeModuleTermFunctionPointers = 0x0au, // S_MOD_TERM_FUNC_POINTERS
 141       SectionTypeCoalesced                  = 0x0bu, // S_COALESCED
 142       SectionTypeZeroFillLarge              = 0x0cu, // S_GB_ZEROFILL
 143       SectionTypeInterposing                = 0x0du, // S_INTERPOSING
 144       SectionType16ByteLiterals             = 0x0eu, // S_16BYTE_LITERALS
 145       SectionTypeDTraceObjectFormat         = 0x0fu, // S_DTRACE_DOF
 146       SectionTypeLazyDylibSymbolPointers    = 0x10u, // S_LAZY_DYLIB_SYMBOL_POINTERS
 147
 148       // Constant masks for the "flags[31:24]" field in llvm::MachO::section and
 149       // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_USR)
 150       SectionAttrUserPureInstructions       = 0x80000000u, // S_ATTR_PURE_INSTRUCTIONS
 151       SectionAttrUserNoTableOfContents      = 0x40000000u, // S_ATTR_NO_TOC
 152       SectionAttrUserCanStripStaticSymbols  = 0x20000000u, // S_ATTR_STRIP_STATIC_SYMS
 153       SectionAttrUserNoDeadStrip            = 0x10000000u, // S_ATTR_NO_DEAD_STRIP
 154       SectionAttrUserLiveSupport            = 0x08000000u, // S_ATTR_LIVE_SUPPORT
 155       SectionAttrUserSelfModifyingCode      = 0x04000000u, // S_ATTR_SELF_MODIFYING_CODE
 156       SectionAttrUserDebug                  = 0x02000000u, // S_ATTR_DEBUG
 157
 158       // Constant masks for the "flags[23:8]" field in llvm::MachO::section and
 159       // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_SYS)
 160       SectionAttrSytemSomeInstructions      = 0x00000400u, // S_ATTR_SOME_INSTRUCTIONS
 161       SectionAttrSytemHasExternalRelocations= 0x00000200u, // S_ATTR_EXT_RELOC
 162       SectionAttrSytemHasLocalRelocations   = 0x00000100u, // S_ATTR_LOC_RELOC
 163
 164       IndirectSymbolLocal                   = 0x80000000u, // INDIRECT_SYMBOL_LOCAL
 165       IndirectSymbolAbsolute                = 0x40000000u, // INDIRECT_SYMBOL_ABS
 166
 167       RebaseTypePointer                     = 1u, // REBASE_TYPE_POINTER
 168       RebaseTypeTextAbsolute32              = 2u, // REBASE_TYPE_TEXT_ABSOLUTE32
 169       RebaseTypeTextPCRelative32            = 3u, // REBASE_TYPE_TEXT_PCREL32
 170
 171       RebaseOpcodeMask                          = 0xF0u, // REBASE_OPCODE_MASK
 172       RebaseImmediateMask                       = 0x0Fu, // REBASE_IMMEDIATE_MASK
 173       RebaseOpcodeDone                          = 0x00u, // REBASE_OPCODE_DONE
 174       RebaseOpcodeSetTypeImmediate              = 0x10u, // REBASE_OPCODE_SET_TYPE_IMM
 175       RebaseOpcodeSetSegmentAndOffsetULEB       = 0x20u, // REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
 176       RebaseOpcodeAddAddressULEB                = 0x30u, // REBASE_OPCODE_ADD_ADDR_ULEB
 177       RebaseOpcodeAddAddressImmediateScaled     = 0x40u, // REBASE_OPCODE_ADD_ADDR_IMM_SCALED
 178       RebaseOpcodeDoRebaseImmediateTimes        = 0x50u, // REBASE_OPCODE_DO_REBASE_IMM_TIMES
 179       RebaseOpcodeDoRebaseULEBTimes             = 0x60u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES
 180       RebaseOpcodeDoRebaseAddAddressULEB        = 0x70u, // REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB
 181       RebaseOpcodeDoRebaseULEBTimesSkippingULEB = 0x80u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB
 182
 183
 184       BindTypePointer           = 1u, // BIND_TYPE_POINTER
 185       BindTypeTextAbsolute32    = 2u, // BIND_TYPE_TEXT_ABSOLUTE32
 186       BindTypeTextPCRelative32  = 3u, // BIND_TYPE_TEXT_PCREL32
 187
 188       BindSpecialDylibSelf            =  0u, // BIND_SPECIAL_DYLIB_SELF
 189       BindSpecialDylibMainExecutable  = -1u, // BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE
 190       BindSpecialDylibFlatLookup      = -2u, // BIND_SPECIAL_DYLIB_FLAT_LOOKUP
 191
 192       BindSymbolFlagsWeakImport         = 0x1u, // BIND_SYMBOL_FLAGS_WEAK_IMPORT
 193       BindSymbolFlagsNonWeakDefinition  = 0x8u, // BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION
 194
 195       BindOpcodeMask                            = 0xF0u, // BIND_OPCODE_MASK
 196       BindImmediateMask                         = 0x0Fu, // BIND_IMMEDIATE_MASK
 197       BindOpcodeDone                            = 0x00u, // BIND_OPCODE_DONE
 198       BindOpcodeSetDylibOrdinalImmediate        = 0x10u, // BIND_OPCODE_SET_DYLIB_ORDINAL_IMM
 199       BindOpcodeSetDylibOrdinalULEB             = 0x20u, // BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB
 200       BindOpcodeSetDylibSpecialImmediate        = 0x30u, // BIND_OPCODE_SET_DYLIB_SPECIAL_IMM
 201       BindOpcodeSetSymbolTrailingFlagsImmediate = 0x40u, // BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM
 202       BindOpcodeSetTypeImmediate                = 0x50u, // BIND_OPCODE_SET_TYPE_IMM
 203       BindOpcodeSetAppendSLEB                   = 0x60u, // BIND_OPCODE_SET_ADDEND_SLEB
 204       BindOpcodeSetSegmentAndOffsetULEB         = 0x70u, // BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
 205       BindOpcodeAddAddressULEB                  = 0x80u, // BIND_OPCODE_ADD_ADDR_ULEB
 206       BindOpcodeDoBind                          = 0x90u, // BIND_OPCODE_DO_BIND
 207       BindOpcodeDoBindAddAddressULEB            = 0xA0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB
 208       BindOpcodeDoBindAddAddressImmediateScaled = 0xB0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED
 209       BindOpcodeDoBindULEBTimesSkippingULEB     = 0xC0u, // BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB
 210
 211       ExportSymbolFlagsKindMask           = 0x03u, // EXPORT_SYMBOL_FLAGS_KIND_MASK
 212       ExportSymbolFlagsKindRegular        = 0x00u, // EXPORT_SYMBOL_FLAGS_KIND_REGULAR
 213       ExportSymbolFlagsKindThreadLocal    = 0x01u, // EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL
 214       ExportSymbolFlagsWeakDefinition     = 0x04u, // EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION
 215       ExportSymbolFlagsIndirectDefinition = 0x08u, // EXPORT_SYMBOL_FLAGS_INDIRECT_DEFINITION
 216       ExportSymbolFlagsHasSpecializations = 0x10u, // EXPORT_SYMBOL_FLAGS_HAS_SPECIALIZATIONS
 217
 218
 219       // Constant masks for the "n_type" field in llvm::MachO::nlist and
 220       // llvm::MachO::nlist_64
 221       NlistMaskStab             = 0xe0, // N_STAB
 222       NlistMaskPrivateExternal  = 0x10, // N_PEXT
 223       NlistMaskType             = 0x0e, // N_TYPE
 224       NlistMaskExternal         = 0x01, // N_EXT
 225
 226       // Constants for the "n_type & N_TYPE" llvm::MachO::nlist and
 227       // llvm::MachO::nlist_64
 228       NListTypeUndefined          = 0x0u, // N_UNDF
 229       NListTypeAbsolute           = 0x2u, // N_ABS
 230       NListTypeSection            = 0xeu, // N_SECT
 231       NListTypePreboundUndefined  = 0xcu, // N_PBUD
 232       NListTypeIndirect           = 0xau, // N_INDR
 233
 234       // Constant masks for the "n_sect" field in llvm::MachO::nlist and
 235       // llvm::MachO::nlist_64
 236       NListSectionNoSection     = 0u, // NO_SECT
 237       NListSectionMaxSection    = 0xffu, // MAX_SECT
 238
 239       // Constant values for the "n_type" field in llvm::MachO::nlist and
 240       // llvm::MachO::nlist_64 when "(n_type & NlistMaskStab) != 0"
 241       StabGlobalSymbol          = 0x20u,  // N_GSYM
 242       StabFunctionName          = 0x22u,  // N_FNAME
 243       StabFunction              = 0x24u,  // N_FUN
 244       StabStaticSymbol          = 0x26u,  // N_STSYM
 245       StabLocalCommon           = 0x28u,  // N_LCSYM
 246       StabBeginSymbol           = 0x2Eu,  // N_BNSYM
 247       StabSourceFileOptions     = 0x3Cu,  // N_OPT
 248       StabRegisterSymbol        = 0x40u,  // N_RSYM
 249       StabSourceLine            = 0x44u,  // N_SLINE
 250       StabEndSymbol             = 0x4Eu,  // N_ENSYM
 251       StabStructureType         = 0x60u,  // N_SSYM
 252       StabSourceFileName        = 0x64u,  // N_SO
 253       StabObjectFileName        = 0x66u,  // N_OSO
 254       StabLocalSymbol           = 0x80u,  // N_LSYM
 255       StabBeginIncludeFileName  = 0x82u,  // N_BINCL
 256       StabIncludeFileName       = 0x84u,  // N_SOL
 257       StabCompilerParameters    = 0x86u,  // N_PARAMS
 258       StabCompilerVersion       = 0x88u,  // N_VERSION
 259       StabCompilerOptLevel      = 0x8Au,  // N_OLEVEL
 260       StabParameter             = 0xA0u,  // N_PSYM
 261       StabEndIncludeFile        = 0xA2u,  // N_EINCL
 262       StabAlternateEntry        = 0xA4u,  // N_ENTRY
 263       StabLeftBracket           = 0xC0u,  // N_LBRAC
 264       StabDeletedIncludeFile    = 0xC2u,  // N_EXCL
 265       StabRightBracket          = 0xE0u,  // N_RBRAC
 266       StabBeginCommon           = 0xE2u,  // N_BCOMM
 267       StabEndCommon             = 0xE4u,  // N_ECOMM
 268       StabEndCommonLocal        = 0xE8u,  // N_ECOML
 269       StabLength                = 0xFEu   // N_LENG
 270
 271     };
 272
 273     // Structs from <mach-o/loader.h>
 274
 275     struct mach_header {
 276       uint32_t magic;
 277       uint32_t cputype;
 278       uint32_t cpusubtype;
 279       uint32_t filetype;
 280       uint32_t ncmds;
 281       uint32_t sizeofcmds;
 282       uint32_t flags;
 283     };
 284
 285     struct mach_header_64 {
 286       uint32_t magic;
 287       uint32_t cputype;
 288       uint32_t cpusubtype;
 289       uint32_t filetype;
 290       uint32_t ncmds;
 291       uint32_t sizeofcmds;
 292       uint32_t flags;
 293       uint32_t reserved;
 294     };
 295
 296     struct load_command {
 297       uint32_t cmd;
 298       uint32_t cmdsize;
 299     };
 300
 301     struct segment_command {
 302       uint32_t cmd;
 303       uint32_t cmdsize;
 304       char segname[16];
 305       uint32_t vmaddr;
 306       uint32_t vmsize;
 307       uint32_t fileoff;
 308       uint32_t filesize;
 309       uint32_t maxprot;
 310       uint32_t initprot;
 311       uint32_t nsects;
 312       uint32_t flags;
 313     };
 314
 315     struct segment_command_64 {
 316       uint32_t cmd;
 317       uint32_t cmdsize;
 318       char segname[16];
 319       uint64_t vmaddr;
 320       uint64_t vmsize;
 321       uint64_t fileoff;
 322       uint64_t filesize;
 323       uint32_t maxprot;
 324       uint32_t initprot;
 325       uint32_t nsects;
 326       uint32_t flags;
 327     };
 328
 329     struct section {
 330       char sectname[16];
 331       char segname[16];
 332       uint32_t addr;
 333       uint32_t size;
 334       uint32_t offset;
 335       uint32_t align;
 336       uint32_t reloff;
 337       uint32_t nreloc;
 338       uint32_t flags;
 339       uint32_t reserved1;
 340       uint32_t reserved2;
 341     };
 342
 343     struct section_64 {
 344       char sectname[16];
 345       char segname[16];
 346       uint64_t addr;
 347       uint64_t size;
 348       uint32_t offset;
 349       uint32_t align;
 350       uint32_t reloff;
 351       uint32_t nreloc;
 352       uint32_t flags;
 353       uint32_t reserved1;
 354       uint32_t reserved2;
 355       uint32_t reserved3;
 356     };
 357
 358     struct fvmlib {
 359       uint32_t name;
 360       uint32_t minor_version;
 361       uint32_t header_addr;
 362     };
 363
 364     struct fvmlib_command {
 365       uint32_t  cmd;
 366       uint32_t cmdsize;
 367       struct fvmlib fvmlib;
 368     };
 369
 370     struct dylib {
 371       uint32_t name;
 372       uint32_t timestamp;
 373       uint32_t current_version;
 374       uint32_t compatibility_version;
 375     };
 376
 377     struct dylib_command {
 378       uint32_t cmd;
 379       uint32_t cmdsize;
 380       struct dylib dylib;
 381     };
 382
 383     struct sub_framework_command {
 384       uint32_t cmd;
 385       uint32_t cmdsize;
 386       uint32_t umbrella;
 387     };
 388
 389     struct sub_client_command {
 390       uint32_t cmd;
 391       uint32_t cmdsize;
 392       uint32_t client;
 393     };
 394
 395     struct sub_umbrella_command {
 396       uint32_t cmd;
 397       uint32_t cmdsize;
 398       uint32_t sub_umbrella;
 399     };
 400
 401     struct sub_library_command {
 402       uint32_t cmd;
 403       uint32_t cmdsize;
 404       uint32_t sub_library;
 405     };
 406
 407     struct prebound_dylib_command {
 408       uint32_t cmd;
 409       uint32_t cmdsize;
 410       uint32_t name;
 411       uint32_t nmodules;
 412       uint32_t linked_modules;
 413     };
 414
 415     struct dylinker_command {
 416       uint32_t cmd;
 417       uint32_t cmdsize;
 418       uint32_t name;
 419     };
 420
 421     struct thread_command {
 422       uint32_t cmd;
 423       uint32_t cmdsize;
 424     };
 425
 426     struct routines_command {
 427       uint32_t cmd;
 428       uint32_t cmdsize;
 429       uint32_t init_address;
 430       uint32_t init_module;
 431       uint32_t reserved1;
 432       uint32_t reserved2;
 433       uint32_t reserved3;
 434       uint32_t reserved4;
 435       uint32_t reserved5;
 436       uint32_t reserved6;
 437     };
 438
 439     struct routines_command_64 {
 440       uint32_t cmd;
 441       uint32_t cmdsize;
 442       uint64_t init_address;
 443       uint64_t init_module;
 444       uint64_t reserved1;
 445       uint64_t reserved2;
 446       uint64_t reserved3;
 447       uint64_t reserved4;
 448       uint64_t reserved5;
 449       uint64_t reserved6;
 450     };
 451
 452     struct symtab_command {
 453       uint32_t cmd;
 454       uint32_t cmdsize;
 455       uint32_t symoff;
 456       uint32_t nsyms;
 457       uint32_t stroff;
 458       uint32_t strsize;
 459     };
 460
 461     struct dysymtab_command {
 462       uint32_t cmd;
 463       uint32_t cmdsize;
 464       uint32_t ilocalsym;
 465       uint32_t nlocalsym;
 466       uint32_t iextdefsym;
 467       uint32_t nextdefsym;
 468       uint32_t iundefsym;
 469       uint32_t nundefsym;
 470       uint32_t tocoff;
 471       uint32_t ntoc;
 472       uint32_t modtaboff;
 473       uint32_t nmodtab;
 474       uint32_t extrefsymoff;
 475       uint32_t nextrefsyms;
 476       uint32_t indirectsymoff;
 477       uint32_t nindirectsyms;
 478       uint32_t extreloff;
 479       uint32_t nextrel;
 480       uint32_t locreloff;
 481       uint32_t nlocrel;
 482     };
 483
 484     struct dylib_table_of_contents {
 485       uint32_t symbol_index;
 486       uint32_t module_index;
 487     };
 488
 489     struct dylib_module {
 490       uint32_t module_name;
 491       uint32_t iextdefsym;
 492       uint32_t nextdefsym;
 493       uint32_t irefsym;
 494       uint32_t nrefsym;
 495       uint32_t ilocalsym;
 496       uint32_t nlocalsym;
 497       uint32_t iextrel;
 498       uint32_t nextrel;
 499       uint32_t iinit_iterm;
 500       uint32_t ninit_nterm;
 501       uint32_t objc_module_info_addr;
 502       uint32_t objc_module_info_size;
 503     };
 504
 505     struct dylib_module_64 {
 506       uint32_t module_name;
 507       uint32_t iextdefsym;
 508       uint32_t nextdefsym;
 509       uint32_t irefsym;
 510       uint32_t nrefsym;
 511       uint32_t ilocalsym;
 512       uint32_t nlocalsym;
 513       uint32_t iextrel;
 514       uint32_t nextrel;
 515       uint32_t iinit_iterm;
 516       uint32_t ninit_nterm;
 517       uint32_t objc_module_info_size;
 518       uint64_t objc_module_info_addr;
 519     };
 520
 521     struct dylib_reference {
 522       uint32_t isym:24,
 523                flags:8;
 524     };
 525
 526
 527     struct twolevel_hints_command {
 528       uint32_t cmd;
 529       uint32_t cmdsize;
 530       uint32_t offset;
 531       uint32_t nhints;
 532     };
 533
 534     struct twolevel_hint {
 535       uint32_t isub_image:8,
 536                itoc:24;
 537     };
 538
 539     struct prebind_cksum_command {
 540       uint32_t cmd;
 541       uint32_t cmdsize;
 542       uint32_t cksum;
 543     };
 544
 545     struct uuid_command {
 546       uint32_t cmd;
 547       uint32_t cmdsize;
 548       uint8_t uuid[16];
 549     };
 550
 551     struct rpath_command {
 552       uint32_t cmd;
 553       uint32_t cmdsize;
 554       uint32_t path;
 555     };
 556
 557     struct linkedit_data_command {
 558       uint32_t cmd;
 559       uint32_t cmdsize;
 560       uint32_t dataoff;
 561       uint32_t datasize;
 562     };
 563
 564     struct encryption_info_command {
 565       uint32_t cmd;
 566       uint32_t cmdsize;
 567       uint32_t cryptoff;
 568       uint32_t cryptsize;
 569       uint32_t cryptid;
 570     };
 571
 572     struct dyld_info_command {
 573       uint32_t cmd;
 574       uint32_t cmdsize;
 575       uint32_t rebase_off;
 576       uint32_t rebase_size;
 577       uint32_t bind_off;
 578       uint32_t bind_size;
 579       uint32_t weak_bind_off;
 580       uint32_t weak_bind_size;
 581       uint32_t lazy_bind_off;
 582       uint32_t lazy_bind_size;
 583       uint32_t export_off;
 584       uint32_t export_size;
 585     };
 586
 587     struct symseg_command {
 588       uint32_t cmd;
 589       uint32_t cmdsize;
 590       uint32_t offset;
 591       uint32_t size;
 592     };
 593
 594     struct ident_command {
 595       uint32_t cmd;
 596       uint32_t cmdsize;
 597     };
 598
 599     struct fvmfile_command {
 600       uint32_t cmd;
 601       uint32_t cmdsize;
 602       uint32_t name;
 603       uint32_t header_addr;
 604     };
 605
 606
 607     // Structs from <mach-o/fat.h>
 608     struct fat_header {
 609       uint32_t magic;
 610       uint32_t nfat_arch;
 611     };
 612
 613     struct fat_arch {
 614       uint32_t cputype;
 615       uint32_t cpusubtype;
 616       uint32_t offset;
 617       uint32_t size;
 618       uint32_t align;
 619     };
 620
 621     // Structs from <mach-o/fat.h>
 622     struct nlist {
 623       uint32_t n_strx;
 624       uint8_t n_type;
 625       uint8_t n_sect;
 626       int16_t n_desc;
 627       uint32_t n_value;
 628     };
 629
 630     struct nlist_64 {
 631       uint32_t n_strx;
 632       uint8_t n_type;
 633       uint8_t n_sect;
 634       uint16_t n_desc;
 635       uint64_t n_value;
 636     };
 637
 638     // Get/Set functions from <mach-o/nlist.h>
 639
 640     static inline uint16_t GET_LIBRARY_ORDINAL(uint16_t n_desc)
 641     {
 642       return (((n_desc) >> 8u) & 0xffu);
 643     }
 644
 645     static inline void SET_LIBRARY_ORDINAL(uint16_t &n_desc, uint8_t ordinal)
 646     {
 647       n_desc = (((n_desc) & 0x00ff) | (((ordinal) & 0xff) << 8));
 648     }
 649
 650     static inline uint8_t GET_COMM_ALIGN (uint16_t n_desc)
 651     {
 652       return (n_desc >> 8u) & 0x0fu;
 653     }
 654
 655     static inline void SET_COMM_ALIGN (uint16_t &n_desc, uint8_t align)
 656     {
 657       n_desc = ((n_desc & 0xf0ffu) | ((align & 0x0fu) << 8u));
 658     }
 659
 660     // Enums from <mach/machine.h>
 661     enum {
 662       // Capability bits used in the definition of cpu_type.
 663       CPUArchMask = 0xff000000,   // Mask for architecture bits
 664       CPUArchABI64 = 0x01000000,  // 64 bit ABI
 665
 666       // Constants for the cputype field.
 667       CPUTypeI386      = 7,
 668       CPUTypeX86_64    = CPUTypeI386 | CPUArchABI64,
 669       CPUTypeARM       = 12,
 670       CPUTypeSPARC     = 14,
 671       CPUTypePowerPC   = 18,
 672       CPUTypePowerPC64 = CPUTypePowerPC | CPUArchABI64,
 673
 674
 675       // Constants for the cpusubtype field.
 676
 677       // X86
 678       CPUSubType_I386_ALL    = 3,
 679       CPUSubType_X86_64_ALL  = 3,
 680
 681       // ARM
 682       CPUSubType_ARM_ALL     = 0,
 683       CPUSubType_ARM_V4T     = 5,
 684       CPUSubType_ARM_V6      = 6,
 685
 686       // PowerPC
 687       CPUSubType_POWERPC_ALL = 0,
 688
 689       CPUSubType_SPARC_ALL   = 0
 690     };
 691   } // end namespace MachO
 692 } // end namespace llvm
 693
 694 #endif