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/Support/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       LoadCommandVersionMinMacOSX         = 0x00000024u, // LC_VERSION_MIN_MACOSX
 114       LoadCommandVersionMinIPhoneOS       = 0x00000025u, // LC_VERSION_MIN_IPHONEOS
 115       LoadCommandFunctionStarts           = 0x00000026u, // LC_FUNCTION_STARTS
 116       LoadCommandDyldEnvironment          = 0x00000027u, // LC_DYLD_ENVIRONMENT
 117       LoadCommandMain                     = 0x80000028u, // LC_MAIN
 118       LoadCommandDataInCode               = 0x00000029u, // LC_DATA_IN_CODE
 119       LoadCommandSourceVersion            = 0x0000002Au, // LC_SOURCE_VERSION
 120       LoadCommandCodeSignDRs              = 0x0000002Bu, // LC_DYLIB_CODE_SIGN_DRS
 121
 122       // Constant bits for the "flags" field in llvm::MachO::segment_command
 123       SegmentCommandFlagBitHighVM             = 0x1u, // SG_HIGHVM
 124       SegmentCommandFlagBitFixedVMLibrary     = 0x2u, // SG_FVMLIB
 125       SegmentCommandFlagBitNoRelocations      = 0x4u, // SG_NORELOC
 126       SegmentCommandFlagBitProtectedVersion1  = 0x8u, // SG_PROTECTED_VERSION_1
 127
 128
 129       // Constant masks for the "flags" field in llvm::MachO::section and
 130       // llvm::MachO::section_64
 131       SectionFlagMaskSectionType      = 0x000000ffu, // SECTION_TYPE
 132       SectionFlagMaskAllAttributes    = 0xffffff00u, // SECTION_ATTRIBUTES
 133       SectionFlagMaskUserAttributes   = 0xff000000u, // SECTION_ATTRIBUTES_USR
 134       SectionFlagMaskSystemAttributes = 0x00ffff00u, // SECTION_ATTRIBUTES_SYS
 135
 136       // Constant masks for the "flags[7:0]" field in llvm::MachO::section and
 137       // llvm::MachO::section_64 (mask "flags" with SECTION_TYPE)
 138       SectionTypeRegular                    = 0x00u, // S_REGULAR
 139       SectionTypeZeroFill                   = 0x01u, // S_ZEROFILL
 140       SectionTypeCStringLiterals            = 0x02u, // S_CSTRING_LITERALS
 141       SectionType4ByteLiterals              = 0x03u, // S_4BYTE_LITERALS
 142       SectionType8ByteLiterals              = 0x04u, // S_8BYTE_LITERALS
 143       SectionTypeLiteralPointers            = 0x05u, // S_LITERAL_POINTERS
 144       SectionTypeNonLazySymbolPointers      = 0x06u, // S_NON_LAZY_SYMBOL_POINTERS
 145       SectionTypeLazySymbolPointers         = 0x07u, // S_LAZY_SYMBOL_POINTERS
 146       SectionTypeSymbolStubs                = 0x08u, // S_SYMBOL_STUBS
 147       SectionTypeModuleInitFunctionPointers = 0x09u, // S_MOD_INIT_FUNC_POINTERS
 148       SectionTypeModuleTermFunctionPointers = 0x0au, // S_MOD_TERM_FUNC_POINTERS
 149       SectionTypeCoalesced                  = 0x0bu, // S_COALESCED
 150       SectionTypeZeroFillLarge              = 0x0cu, // S_GB_ZEROFILL
 151       SectionTypeInterposing                = 0x0du, // S_INTERPOSING
 152       SectionType16ByteLiterals             = 0x0eu, // S_16BYTE_LITERALS
 153       SectionTypeDTraceObjectFormat         = 0x0fu, // S_DTRACE_DOF
 154       SectionTypeLazyDylibSymbolPointers    = 0x10u, // S_LAZY_DYLIB_SYMBOL_POINTERS
 155
 156       // Constant masks for the "flags[31:24]" field in llvm::MachO::section and
 157       // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_USR)
 158       SectionAttrUserPureInstructions       = 0x80000000u, // S_ATTR_PURE_INSTRUCTIONS
 159       SectionAttrUserNoTableOfContents      = 0x40000000u, // S_ATTR_NO_TOC
 160       SectionAttrUserCanStripStaticSymbols  = 0x20000000u, // S_ATTR_STRIP_STATIC_SYMS
 161       SectionAttrUserNoDeadStrip            = 0x10000000u, // S_ATTR_NO_DEAD_STRIP
 162       SectionAttrUserLiveSupport            = 0x08000000u, // S_ATTR_LIVE_SUPPORT
 163       SectionAttrUserSelfModifyingCode      = 0x04000000u, // S_ATTR_SELF_MODIFYING_CODE
 164       SectionAttrUserDebug                  = 0x02000000u, // S_ATTR_DEBUG
 165
 166       // Constant masks for the "flags[23:8]" field in llvm::MachO::section and
 167       // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_SYS)
 168       SectionAttrSytemSomeInstructions      = 0x00000400u, // S_ATTR_SOME_INSTRUCTIONS
 169       SectionAttrSytemHasExternalRelocations= 0x00000200u, // S_ATTR_EXT_RELOC
 170       SectionAttrSytemHasLocalRelocations   = 0x00000100u, // S_ATTR_LOC_RELOC
 171
 172       IndirectSymbolLocal                   = 0x80000000u, // INDIRECT_SYMBOL_LOCAL
 173       IndirectSymbolAbsolute                = 0x40000000u, // INDIRECT_SYMBOL_ABS
 174
 175       RebaseTypePointer                     = 1u, // REBASE_TYPE_POINTER
 176       RebaseTypeTextAbsolute32              = 2u, // REBASE_TYPE_TEXT_ABSOLUTE32
 177       RebaseTypeTextPCRelative32            = 3u, // REBASE_TYPE_TEXT_PCREL32
 178
 179       RebaseOpcodeMask                          = 0xF0u, // REBASE_OPCODE_MASK
 180       RebaseImmediateMask                       = 0x0Fu, // REBASE_IMMEDIATE_MASK
 181       RebaseOpcodeDone                          = 0x00u, // REBASE_OPCODE_DONE
 182       RebaseOpcodeSetTypeImmediate              = 0x10u, // REBASE_OPCODE_SET_TYPE_IMM
 183       RebaseOpcodeSetSegmentAndOffsetULEB       = 0x20u, // REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
 184       RebaseOpcodeAddAddressULEB                = 0x30u, // REBASE_OPCODE_ADD_ADDR_ULEB
 185       RebaseOpcodeAddAddressImmediateScaled     = 0x40u, // REBASE_OPCODE_ADD_ADDR_IMM_SCALED
 186       RebaseOpcodeDoRebaseImmediateTimes        = 0x50u, // REBASE_OPCODE_DO_REBASE_IMM_TIMES
 187       RebaseOpcodeDoRebaseULEBTimes             = 0x60u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES
 188       RebaseOpcodeDoRebaseAddAddressULEB        = 0x70u, // REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB
 189       RebaseOpcodeDoRebaseULEBTimesSkippingULEB = 0x80u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB
 190
 191
 192       BindTypePointer           = 1u, // BIND_TYPE_POINTER
 193       BindTypeTextAbsolute32    = 2u, // BIND_TYPE_TEXT_ABSOLUTE32
 194       BindTypeTextPCRelative32  = 3u, // BIND_TYPE_TEXT_PCREL32
 195
 196       BindSpecialDylibSelf            =  0u, // BIND_SPECIAL_DYLIB_SELF
 197       BindSpecialDylibMainExecutable  = -1u, // BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE
 198       BindSpecialDylibFlatLookup      = -2u, // BIND_SPECIAL_DYLIB_FLAT_LOOKUP
 199
 200       BindSymbolFlagsWeakImport         = 0x1u, // BIND_SYMBOL_FLAGS_WEAK_IMPORT
 201       BindSymbolFlagsNonWeakDefinition  = 0x8u, // BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION
 202
 203       BindOpcodeMask                            = 0xF0u, // BIND_OPCODE_MASK
 204       BindImmediateMask                         = 0x0Fu, // BIND_IMMEDIATE_MASK
 205       BindOpcodeDone                            = 0x00u, // BIND_OPCODE_DONE
 206       BindOpcodeSetDylibOrdinalImmediate        = 0x10u, // BIND_OPCODE_SET_DYLIB_ORDINAL_IMM
 207       BindOpcodeSetDylibOrdinalULEB             = 0x20u, // BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB
 208       BindOpcodeSetDylibSpecialImmediate        = 0x30u, // BIND_OPCODE_SET_DYLIB_SPECIAL_IMM
 209       BindOpcodeSetSymbolTrailingFlagsImmediate = 0x40u, // BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM
 210       BindOpcodeSetTypeImmediate                = 0x50u, // BIND_OPCODE_SET_TYPE_IMM
 211       BindOpcodeSetAppendSLEB                   = 0x60u, // BIND_OPCODE_SET_ADDEND_SLEB
 212       BindOpcodeSetSegmentAndOffsetULEB         = 0x70u, // BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
 213       BindOpcodeAddAddressULEB                  = 0x80u, // BIND_OPCODE_ADD_ADDR_ULEB
 214       BindOpcodeDoBind                          = 0x90u, // BIND_OPCODE_DO_BIND
 215       BindOpcodeDoBindAddAddressULEB            = 0xA0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB
 216       BindOpcodeDoBindAddAddressImmediateScaled = 0xB0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED
 217       BindOpcodeDoBindULEBTimesSkippingULEB     = 0xC0u, // BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB
 218
 219       ExportSymbolFlagsKindMask           = 0x03u, // EXPORT_SYMBOL_FLAGS_KIND_MASK
 220       ExportSymbolFlagsKindRegular        = 0x00u, // EXPORT_SYMBOL_FLAGS_KIND_REGULAR
 221       ExportSymbolFlagsKindThreadLocal    = 0x01u, // EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL
 222       ExportSymbolFlagsWeakDefinition     = 0x04u, // EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION
 223       ExportSymbolFlagsIndirectDefinition = 0x08u, // EXPORT_SYMBOL_FLAGS_INDIRECT_DEFINITION
 224       ExportSymbolFlagsHasSpecializations = 0x10u, // EXPORT_SYMBOL_FLAGS_HAS_SPECIALIZATIONS
 225
 226
 227       // Constant masks for the "n_type" field in llvm::MachO::nlist and
 228       // llvm::MachO::nlist_64
 229       NlistMaskStab             = 0xe0, // N_STAB
 230       NlistMaskPrivateExternal  = 0x10, // N_PEXT
 231       NlistMaskType             = 0x0e, // N_TYPE
 232       NlistMaskExternal         = 0x01, // N_EXT
 233
 234       // Constants for the "n_type & N_TYPE" llvm::MachO::nlist and
 235       // llvm::MachO::nlist_64
 236       NListTypeUndefined          = 0x0u, // N_UNDF
 237       NListTypeAbsolute           = 0x2u, // N_ABS
 238       NListTypeSection            = 0xeu, // N_SECT
 239       NListTypePreboundUndefined  = 0xcu, // N_PBUD
 240       NListTypeIndirect           = 0xau, // N_INDR
 241
 242       // Constant masks for the "n_sect" field in llvm::MachO::nlist and
 243       // llvm::MachO::nlist_64
 244       NListSectionNoSection     = 0u, // NO_SECT
 245       NListSectionMaxSection    = 0xffu, // MAX_SECT
 246
 247       NListDescWeakRef          = 0x40u,
 248       NListDescWeakDef          = 0x80u,
 249
 250       // Constant values for the "n_type" field in llvm::MachO::nlist and
 251       // llvm::MachO::nlist_64 when "(n_type & NlistMaskStab) != 0"
 252       StabGlobalSymbol          = 0x20u,  // N_GSYM
 253       StabFunctionName          = 0x22u,  // N_FNAME
 254       StabFunction              = 0x24u,  // N_FUN
 255       StabStaticSymbol          = 0x26u,  // N_STSYM
 256       StabLocalCommon           = 0x28u,  // N_LCSYM
 257       StabBeginSymbol           = 0x2Eu,  // N_BNSYM
 258       StabSourceFileOptions     = 0x3Cu,  // N_OPT
 259       StabRegisterSymbol        = 0x40u,  // N_RSYM
 260       StabSourceLine            = 0x44u,  // N_SLINE
 261       StabEndSymbol             = 0x4Eu,  // N_ENSYM
 262       StabStructureType         = 0x60u,  // N_SSYM
 263       StabSourceFileName        = 0x64u,  // N_SO
 264       StabObjectFileName        = 0x66u,  // N_OSO
 265       StabLocalSymbol           = 0x80u,  // N_LSYM
 266       StabBeginIncludeFileName  = 0x82u,  // N_BINCL
 267       StabIncludeFileName       = 0x84u,  // N_SOL
 268       StabCompilerParameters    = 0x86u,  // N_PARAMS
 269       StabCompilerVersion       = 0x88u,  // N_VERSION
 270       StabCompilerOptLevel      = 0x8Au,  // N_OLEVEL
 271       StabParameter             = 0xA0u,  // N_PSYM
 272       StabEndIncludeFile        = 0xA2u,  // N_EINCL
 273       StabAlternateEntry        = 0xA4u,  // N_ENTRY
 274       StabLeftBracket           = 0xC0u,  // N_LBRAC
 275       StabDeletedIncludeFile    = 0xC2u,  // N_EXCL
 276       StabRightBracket          = 0xE0u,  // N_RBRAC
 277       StabBeginCommon           = 0xE2u,  // N_BCOMM
 278       StabEndCommon             = 0xE4u,  // N_ECOMM
 279       StabEndCommonLocal        = 0xE8u,  // N_ECOML
 280       StabLength                = 0xFEu   // N_LENG
 281
 282     };
 283
 284     // Structs from <mach-o/loader.h>
 285
 286     struct mach_header {
 287       uint32_t magic;
 288       uint32_t cputype;
 289       uint32_t cpusubtype;
 290       uint32_t filetype;
 291       uint32_t ncmds;
 292       uint32_t sizeofcmds;
 293       uint32_t flags;
 294     };
 295
 296     struct mach_header_64 {
 297       uint32_t magic;
 298       uint32_t cputype;
 299       uint32_t cpusubtype;
 300       uint32_t filetype;
 301       uint32_t ncmds;
 302       uint32_t sizeofcmds;
 303       uint32_t flags;
 304       uint32_t reserved;
 305     };
 306
 307     struct load_command {
 308       uint32_t cmd;
 309       uint32_t cmdsize;
 310     };
 311
 312     struct segment_command {
 313       uint32_t cmd;
 314       uint32_t cmdsize;
 315       char segname[16];
 316       uint32_t vmaddr;
 317       uint32_t vmsize;
 318       uint32_t fileoff;
 319       uint32_t filesize;
 320       uint32_t maxprot;
 321       uint32_t initprot;
 322       uint32_t nsects;
 323       uint32_t flags;
 324     };
 325
 326     struct segment_command_64 {
 327       uint32_t cmd;
 328       uint32_t cmdsize;
 329       char segname[16];
 330       uint64_t vmaddr;
 331       uint64_t vmsize;
 332       uint64_t fileoff;
 333       uint64_t filesize;
 334       uint32_t maxprot;
 335       uint32_t initprot;
 336       uint32_t nsects;
 337       uint32_t flags;
 338     };
 339
 340     struct section {
 341       char sectname[16];
 342       char segname[16];
 343       uint32_t addr;
 344       uint32_t size;
 345       uint32_t offset;
 346       uint32_t align;
 347       uint32_t reloff;
 348       uint32_t nreloc;
 349       uint32_t flags;
 350       uint32_t reserved1;
 351       uint32_t reserved2;
 352     };
 353
 354     struct section_64 {
 355       char sectname[16];
 356       char segname[16];
 357       uint64_t addr;
 358       uint64_t size;
 359       uint32_t offset;
 360       uint32_t align;
 361       uint32_t reloff;
 362       uint32_t nreloc;
 363       uint32_t flags;
 364       uint32_t reserved1;
 365       uint32_t reserved2;
 366       uint32_t reserved3;
 367     };
 368
 369     struct fvmlib {
 370       uint32_t name;
 371       uint32_t minor_version;
 372       uint32_t header_addr;
 373     };
 374
 375     struct fvmlib_command {
 376       uint32_t  cmd;
 377       uint32_t cmdsize;
 378       struct fvmlib fvmlib;
 379     };
 380
 381     struct dylib {
 382       uint32_t name;
 383       uint32_t timestamp;
 384       uint32_t current_version;
 385       uint32_t compatibility_version;
 386     };
 387
 388     struct dylib_command {
 389       uint32_t cmd;
 390       uint32_t cmdsize;
 391       struct dylib dylib;
 392     };
 393
 394     struct sub_framework_command {
 395       uint32_t cmd;
 396       uint32_t cmdsize;
 397       uint32_t umbrella;
 398     };
 399
 400     struct sub_client_command {
 401       uint32_t cmd;
 402       uint32_t cmdsize;
 403       uint32_t client;
 404     };
 405
 406     struct sub_umbrella_command {
 407       uint32_t cmd;
 408       uint32_t cmdsize;
 409       uint32_t sub_umbrella;
 410     };
 411
 412     struct sub_library_command {
 413       uint32_t cmd;
 414       uint32_t cmdsize;
 415       uint32_t sub_library;
 416     };
 417
 418     struct prebound_dylib_command {
 419       uint32_t cmd;
 420       uint32_t cmdsize;
 421       uint32_t name;
 422       uint32_t nmodules;
 423       uint32_t linked_modules;
 424     };
 425
 426     struct dylinker_command {
 427       uint32_t cmd;
 428       uint32_t cmdsize;
 429       uint32_t name;
 430     };
 431
 432     struct thread_command {
 433       uint32_t cmd;
 434       uint32_t cmdsize;
 435     };
 436
 437     struct routines_command {
 438       uint32_t cmd;
 439       uint32_t cmdsize;
 440       uint32_t init_address;
 441       uint32_t init_module;
 442       uint32_t reserved1;
 443       uint32_t reserved2;
 444       uint32_t reserved3;
 445       uint32_t reserved4;
 446       uint32_t reserved5;
 447       uint32_t reserved6;
 448     };
 449
 450     struct routines_command_64 {
 451       uint32_t cmd;
 452       uint32_t cmdsize;
 453       uint64_t init_address;
 454       uint64_t init_module;
 455       uint64_t reserved1;
 456       uint64_t reserved2;
 457       uint64_t reserved3;
 458       uint64_t reserved4;
 459       uint64_t reserved5;
 460       uint64_t reserved6;
 461     };
 462
 463     struct symtab_command {
 464       uint32_t cmd;
 465       uint32_t cmdsize;
 466       uint32_t symoff;
 467       uint32_t nsyms;
 468       uint32_t stroff;
 469       uint32_t strsize;
 470     };
 471
 472     struct dysymtab_command {
 473       uint32_t cmd;
 474       uint32_t cmdsize;
 475       uint32_t ilocalsym;
 476       uint32_t nlocalsym;
 477       uint32_t iextdefsym;
 478       uint32_t nextdefsym;
 479       uint32_t iundefsym;
 480       uint32_t nundefsym;
 481       uint32_t tocoff;
 482       uint32_t ntoc;
 483       uint32_t modtaboff;
 484       uint32_t nmodtab;
 485       uint32_t extrefsymoff;
 486       uint32_t nextrefsyms;
 487       uint32_t indirectsymoff;
 488       uint32_t nindirectsyms;
 489       uint32_t extreloff;
 490       uint32_t nextrel;
 491       uint32_t locreloff;
 492       uint32_t nlocrel;
 493     };
 494
 495     struct dylib_table_of_contents {
 496       uint32_t symbol_index;
 497       uint32_t module_index;
 498     };
 499
 500     struct dylib_module {
 501       uint32_t module_name;
 502       uint32_t iextdefsym;
 503       uint32_t nextdefsym;
 504       uint32_t irefsym;
 505       uint32_t nrefsym;
 506       uint32_t ilocalsym;
 507       uint32_t nlocalsym;
 508       uint32_t iextrel;
 509       uint32_t nextrel;
 510       uint32_t iinit_iterm;
 511       uint32_t ninit_nterm;
 512       uint32_t objc_module_info_addr;
 513       uint32_t objc_module_info_size;
 514     };
 515
 516     struct dylib_module_64 {
 517       uint32_t module_name;
 518       uint32_t iextdefsym;
 519       uint32_t nextdefsym;
 520       uint32_t irefsym;
 521       uint32_t nrefsym;
 522       uint32_t ilocalsym;
 523       uint32_t nlocalsym;
 524       uint32_t iextrel;
 525       uint32_t nextrel;
 526       uint32_t iinit_iterm;
 527       uint32_t ninit_nterm;
 528       uint32_t objc_module_info_size;
 529       uint64_t objc_module_info_addr;
 530     };
 531
 532     struct dylib_reference {
 533       uint32_t isym:24,
 534                flags:8;
 535     };
 536
 537
 538     struct twolevel_hints_command {
 539       uint32_t cmd;
 540       uint32_t cmdsize;
 541       uint32_t offset;
 542       uint32_t nhints;
 543     };
 544
 545     struct twolevel_hint {
 546       uint32_t isub_image:8,
 547                itoc:24;
 548     };
 549
 550     struct prebind_cksum_command {
 551       uint32_t cmd;
 552       uint32_t cmdsize;
 553       uint32_t cksum;
 554     };
 555
 556     struct uuid_command {
 557       uint32_t cmd;
 558       uint32_t cmdsize;
 559       uint8_t uuid[16];
 560     };
 561
 562     struct rpath_command {
 563       uint32_t cmd;
 564       uint32_t cmdsize;
 565       uint32_t path;
 566     };
 567
 568     struct linkedit_data_command {
 569       uint32_t cmd;
 570       uint32_t cmdsize;
 571       uint32_t dataoff;
 572       uint32_t datasize;
 573     };
 574
 575     struct encryption_info_command {
 576       uint32_t cmd;
 577       uint32_t cmdsize;
 578       uint32_t cryptoff;
 579       uint32_t cryptsize;
 580       uint32_t cryptid;
 581     };
 582
 583     struct version_min_command {
 584       uint32_t cmd;
 585       uint32_t cmdsize;
 586       uint32_t version;
 587       uint32_t reserved;
 588     };
 589
 590     struct dyld_info_command {
 591       uint32_t cmd;
 592       uint32_t cmdsize;
 593       uint32_t rebase_off;
 594       uint32_t rebase_size;
 595       uint32_t bind_off;
 596       uint32_t bind_size;
 597       uint32_t weak_bind_off;
 598       uint32_t weak_bind_size;
 599       uint32_t lazy_bind_off;
 600       uint32_t lazy_bind_size;
 601       uint32_t export_off;
 602       uint32_t export_size;
 603     };
 604
 605     struct symseg_command {
 606       uint32_t cmd;
 607       uint32_t cmdsize;
 608       uint32_t offset;
 609       uint32_t size;
 610     };
 611
 612     struct ident_command {
 613       uint32_t cmd;
 614       uint32_t cmdsize;
 615     };
 616
 617     struct fvmfile_command {
 618       uint32_t cmd;
 619       uint32_t cmdsize;
 620       uint32_t name;
 621       uint32_t header_addr;
 622     };
 623
 624
 625     // Structs from <mach-o/fat.h>
 626     struct fat_header {
 627       uint32_t magic;
 628       uint32_t nfat_arch;
 629     };
 630
 631     struct fat_arch {
 632       uint32_t cputype;
 633       uint32_t cpusubtype;
 634       uint32_t offset;
 635       uint32_t size;
 636       uint32_t align;
 637     };
 638
 639     // Structs from <mach-o/fat.h>
 640     struct nlist {
 641       uint32_t n_strx;
 642       uint8_t n_type;
 643       uint8_t n_sect;
 644       int16_t n_desc;
 645       uint32_t n_value;
 646     };
 647
 648     struct nlist_64 {
 649       uint32_t n_strx;
 650       uint8_t n_type;
 651       uint8_t n_sect;
 652       uint16_t n_desc;
 653       uint64_t n_value;
 654     };
 655
 656     // Get/Set functions from <mach-o/nlist.h>
 657
 658     static inline uint16_t GET_LIBRARY_ORDINAL(uint16_t n_desc)
 659     {
 660       return (((n_desc) >> 8u) & 0xffu);
 661     }
 662
 663     static inline void SET_LIBRARY_ORDINAL(uint16_t &n_desc, uint8_t ordinal)
 664     {
 665       n_desc = (((n_desc) & 0x00ff) | (((ordinal) & 0xff) << 8));
 666     }
 667
 668     static inline uint8_t GET_COMM_ALIGN (uint16_t n_desc)
 669     {
 670       return (n_desc >> 8u) & 0x0fu;
 671     }
 672
 673     static inline void SET_COMM_ALIGN (uint16_t &n_desc, uint8_t align)
 674     {
 675       n_desc = ((n_desc & 0xf0ffu) | ((align & 0x0fu) << 8u));
 676     }
 677
 678     // Enums from <mach/machine.h>
 679     enum {
 680       // Capability bits used in the definition of cpu_type.
 681       CPUArchMask = 0xff000000,   // Mask for architecture bits
 682       CPUArchABI64 = 0x01000000,  // 64 bit ABI
 683
 684       // Constants for the cputype field.
 685       CPUTypeI386      = 7,
 686       CPUTypeX86_64    = CPUTypeI386 | CPUArchABI64,
 687       CPUTypeARM       = 12,
 688       CPUTypeSPARC     = 14,
 689       CPUTypePowerPC   = 18,
 690       CPUTypePowerPC64 = CPUTypePowerPC | CPUArchABI64,
 691
 692
 693       // Constants for the cpusubtype field.
 694
 695       // X86
 696       CPUSubType_I386_ALL    = 3,
 697       CPUSubType_X86_64_ALL  = 3,
 698
 699       // ARM
 700       CPUSubType_ARM_ALL     = 0,
 701       CPUSubType_ARM_V4T     = 5,
 702       CPUSubType_ARM_V5      = 7,
 703       CPUSubType_ARM_V6      = 6,
 704       CPUSubType_ARM_V7      = 9,
 705
 706       // PowerPC
 707       CPUSubType_POWERPC_ALL = 0,
 708
 709       CPUSubType_SPARC_ALL   = 0
 710     };
 711   } // end namespace MachO
 712 } // end namespace llvm
 713
 714 #endif