text: //===-- llvm/Support/MachO.h - The MachO file format ------------*- C++ -*-===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file defines manifest constants for the MachO object file format.
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_SUPPORT_MACHO_H
  #define LLVM_SUPPORT_MACHO_H
  
  #include "llvm/Support/DataTypes.h"
  
  // NOTE: The enums in this file are intentially named to be different than those
  // in the headers in /usr/include/mach (on darwin systems) to avoid conflicts
  // with those macros.
  namespace llvm {
    namespace MachO {
      // Enums from <mach-o/loader.h>
      enum {
        // Constants for the "magic" field in llvm::MachO::mach_header and
        // llvm::MachO::mach_header_64
        HeaderMagic32         = 0xFEEDFACEu, // MH_MAGIC
        HeaderMagic32Swapped  = 0xCEFAEDFEu, // MH_CIGAM
        HeaderMagic64         = 0xFEEDFACFu, // MH_MAGIC_64
        HeaderMagic64Swapped  = 0xCFFAEDFEu, // MH_CIGAM_64
        UniversalMagic        = 0xCAFEBABEu, // FAT_MAGIC
        UniversalMagicSwapped = 0xBEBAFECAu, // FAT_CIGAM
  
        // Constants for the "filetype" field in llvm::MachO::mach_header and
        // llvm::MachO::mach_header_64
        HeaderFileTypeObject              = 0x1u, // MH_OBJECT
        HeaderFileTypeExecutable          = 0x2u, // MH_EXECUTE
        HeaderFileTypeFixedVMShlib        = 0x3u, // MH_FVMLIB
        HeaderFileTypeCore                = 0x4u, // MH_CORE
        HeaderFileTypePreloadedExecutable = 0x5u, // MH_PRELOAD
        HeaderFileTypeDynamicShlib        = 0x6u, // MH_DYLIB
        HeaderFileTypeDynamicLinkEditor   = 0x7u, // MH_DYLINKER
        HeaderFileTypeBundle              = 0x8u, // MH_BUNDLE
        HeaderFileTypeDynamicShlibStub    = 0x9u, // MH_DYLIB_STUB
        HeaderFileTypeDSYM                = 0xAu, // MH_DSYM
        HeaderFileTypeKextBundle          = 0xBu, // MH_KEXT_BUNDLE
  
        // Constant bits for the "flags" field in llvm::MachO::mach_header and
        // llvm::MachO::mach_header_64
        HeaderFlagBitNoUndefinedSymbols     = 0x00000001u, // MH_NOUNDEFS
        HeaderFlagBitIsIncrementalLinkObject= 0x00000002u, // MH_INCRLINK
        HeaderFlagBitIsDynamicLinkObject    = 0x00000004u, // MH_DYLDLINK
        HeaderFlagBitBindAtLoad             = 0x00000008u, // MH_BINDATLOAD
        HeaderFlagBitPrebound               = 0x00000010u, // MH_PREBOUND
        HeaderFlagBitSplitSegments          = 0x00000020u, // MH_SPLIT_SEGS
        HeaderFlagBitLazyInit               = 0x00000040u, // MH_LAZY_INIT
        HeaderFlagBitTwoLevelNamespace      = 0x00000080u, // MH_TWOLEVEL
        HeaderFlagBitForceFlatNamespace     = 0x00000100u, // MH_FORCE_FLAT
        HeaderFlagBitNoMultipleDefintions   = 0x00000200u, // MH_NOMULTIDEFS
        HeaderFlagBitNoFixPrebinding        = 0x00000400u, // MH_NOFIXPREBINDING
        HeaderFlagBitPrebindable            = 0x00000800u, // MH_PREBINDABLE
        HeaderFlagBitAllModulesBound        = 0x00001000u, // MH_ALLMODSBOUND
        HeaderFlagBitSubsectionsViaSymbols  = 0x00002000u, // MH_SUBSECTIONS_VIA_SYMBOLS
        HeaderFlagBitCanonical              = 0x00004000u, // MH_CANONICAL
        HeaderFlagBitWeakDefines            = 0x00008000u, // MH_WEAK_DEFINES
        HeaderFlagBitBindsToWeak            = 0x00010000u, // MH_BINDS_TO_WEAK
        HeaderFlagBitAllowStackExecution    = 0x00020000u, // MH_ALLOW_STACK_EXECUTION
        HeaderFlagBitRootSafe               = 0x00040000u, // MH_ROOT_SAFE
        HeaderFlagBitSetUIDSafe             = 0x00080000u, // MH_SETUID_SAFE
        HeaderFlagBitNoReexportedDylibs     = 0x00100000u, // MH_NO_REEXPORTED_DYLIBS
        HeaderFlagBitPIE                    = 0x00200000u, // MH_PIE
        HeaderFlagBitDeadStrippableDylib    = 0x00400000u, // MH_DEAD_STRIPPABLE_DYLIB
  
        // Constants for the "cmd" field in llvm::MachO::load_command
        LoadCommandDynamicLinkerRequired    = 0x80000000u, // LC_REQ_DYLD
        LoadCommandSegment32                = 0x00000001u, // LC_SEGMENT
        LoadCommandSymtab                   = 0x00000002u, // LC_SYMTAB
        LoadCommandSymSeg                   = 0x00000003u, // LC_SYMSEG
        LoadCommandThread                   = 0x00000004u, // LC_THREAD
        LoadCommandUnixThread               = 0x00000005u, // LC_UNIXTHREAD
        LoadCommandFixedVMShlibLoad         = 0x00000006u, // LC_LOADFVMLIB
        LoadCommandFixedVMShlibIdent        = 0x00000007u, // LC_IDFVMLIB
        LoadCommandIdent                    = 0x00000008u, // LC_IDENT
        LoadCommandFixedVMFileInclusion     = 0x00000009u, // LC_FVMFILE
        LoadCommandPrePage                  = 0x0000000Au, // LC_PREPAGE
        LoadCommandDynamicSymtabInfo        = 0x0000000Bu, // LC_DYSYMTAB
        LoadCommandDylibLoad                = 0x0000000Cu, // LC_LOAD_DYLIB
        LoadCommandDylibIdent               = 0x0000000Du, // LC_ID_DYLIB
        LoadCommandDynamicLinkerLoad        = 0x0000000Eu, // LC_LOAD_DYLINKER
        LoadCommandDynamicLinkerIdent       = 0x0000000Fu, // LC_ID_DYLINKER
        LoadCommandDylibPrebound            = 0x00000010u, // LC_PREBOUND_DYLIB
        LoadCommandRoutines32               = 0x00000011u, // LC_ROUTINES
        LoadCommandSubFramework             = 0x00000012u, // LC_SUB_FRAMEWORK
        LoadCommandSubUmbrella              = 0x00000013u, // LC_SUB_UMBRELLA
        LoadCommandSubClient                = 0x00000014u, // LC_SUB_CLIENT
        LoadCommandSubLibrary               = 0x00000015u, // LC_SUB_LIBRARY
        LoadCommandTwoLevelHints            = 0x00000016u, // LC_TWOLEVEL_HINTS
        LoadCommandPreBindChecksum          = 0x00000017u, // LC_PREBIND_CKSUM
        LoadCommandDylibLoadWeak            = 0x80000018u, // LC_LOAD_WEAK_DYLIB
        LoadCommandSegment64                = 0x00000019u, // LC_SEGMENT_64
        LoadCommandRoutines64               = 0x0000001Au, // LC_ROUTINES_64
        LoadCommandUUID                     = 0x0000001Bu, // LC_UUID
        LoadCommandRunpath                  = 0x8000001Cu, // LC_RPATH
        LoadCommandCodeSignature            = 0x0000001Du, // LC_CODE_SIGNATURE
        LoadCommandSegmentSplitInfo         = 0x0000001Eu, // LC_SEGMENT_SPLIT_INFO
        LoadCommandDylibReexport            = 0x8000001Fu, // LC_REEXPORT_DYLIB
        LoadCommandDylibLazyLoad            = 0x00000020u, // LC_LAZY_LOAD_DYLIB
        LoadCommandEncryptionInfo           = 0x00000021u, // LC_ENCRYPTION_INFO
        LoadCommandDynamicLinkerInfo        = 0x00000022u, // LC_DYLD_INFO
        LoadCommandDynamicLinkerInfoOnly    = 0x80000022u, // LC_DYLD_INFO_ONLY
        LoadCommandDylibLoadUpward          = 0x80000023u, // LC_LOAD_UPWARD_DYLIB
        LoadCommandVersionMinMacOSX         = 0x00000024u, // LC_VERSION_MIN_MACOSX
        LoadCommandVersionMinIPhoneOS       = 0x00000025u, // LC_VERSION_MIN_IPHONEOS
        LoadCommandFunctionStarts           = 0x00000026u, // LC_FUNCTION_STARTS
        LoadCommandDyldEnvironment          = 0x00000027u, // LC_DYLD_ENVIRONMENT
        LoadCommandMain                     = 0x80000028u, // LC_MAIN
        LoadCommandDataInCode               = 0x00000029u, // LC_DATA_IN_CODE
        LoadCommandSourceVersion            = 0x0000002Au, // LC_SOURCE_VERSION
        LoadCommandCodeSignDRs              = 0x0000002Bu, // LC_DYLIB_CODE_SIGN_DRS
  
        // Constant bits for the "flags" field in llvm::MachO::segment_command
        SegmentCommandFlagBitHighVM             = 0x1u, // SG_HIGHVM
        SegmentCommandFlagBitFixedVMLibrary     = 0x2u, // SG_FVMLIB
        SegmentCommandFlagBitNoRelocations      = 0x4u, // SG_NORELOC
        SegmentCommandFlagBitProtectedVersion1  = 0x8u, // SG_PROTECTED_VERSION_1
  
  
        // Constant masks for the "flags" field in llvm::MachO::section and
        // llvm::MachO::section_64
        SectionFlagMaskSectionType      = 0x000000ffu, // SECTION_TYPE
        SectionFlagMaskAllAttributes    = 0xffffff00u, // SECTION_ATTRIBUTES
        SectionFlagMaskUserAttributes   = 0xff000000u, // SECTION_ATTRIBUTES_USR
        SectionFlagMaskSystemAttributes = 0x00ffff00u, // SECTION_ATTRIBUTES_SYS
  
        // Constant masks for the "flags[7:0]" field in llvm::MachO::section and
        // llvm::MachO::section_64 (mask "flags" with SECTION_TYPE)
        SectionTypeRegular                    = 0x00u, // S_REGULAR
        SectionTypeZeroFill                   = 0x01u, // S_ZEROFILL
        SectionTypeCStringLiterals            = 0x02u, // S_CSTRING_LITERALS
        SectionType4ByteLiterals              = 0x03u, // S_4BYTE_LITERALS
        SectionType8ByteLiterals              = 0x04u, // S_8BYTE_LITERALS
        SectionTypeLiteralPointers            = 0x05u, // S_LITERAL_POINTERS
        SectionTypeNonLazySymbolPointers      = 0x06u, // S_NON_LAZY_SYMBOL_POINTERS
        SectionTypeLazySymbolPointers         = 0x07u, // S_LAZY_SYMBOL_POINTERS
        SectionTypeSymbolStubs                = 0x08u, // S_SYMBOL_STUBS
        SectionTypeModuleInitFunctionPointers = 0x09u, // S_MOD_INIT_FUNC_POINTERS
        SectionTypeModuleTermFunctionPointers = 0x0au, // S_MOD_TERM_FUNC_POINTERS
        SectionTypeCoalesced                  = 0x0bu, // S_COALESCED
        SectionTypeZeroFillLarge              = 0x0cu, // S_GB_ZEROFILL
        SectionTypeInterposing                = 0x0du, // S_INTERPOSING
        SectionType16ByteLiterals             = 0x0eu, // S_16BYTE_LITERALS
        SectionTypeDTraceObjectFormat         = 0x0fu, // S_DTRACE_DOF
        SectionTypeLazyDylibSymbolPointers    = 0x10u, // S_LAZY_DYLIB_SYMBOL_POINTERS
  
        // Constant masks for the "flags[31:24]" field in llvm::MachO::section and
        // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_USR)
        SectionAttrUserPureInstructions       = 0x80000000u, // S_ATTR_PURE_INSTRUCTIONS
        SectionAttrUserNoTableOfContents      = 0x40000000u, // S_ATTR_NO_TOC
        SectionAttrUserCanStripStaticSymbols  = 0x20000000u, // S_ATTR_STRIP_STATIC_SYMS
        SectionAttrUserNoDeadStrip            = 0x10000000u, // S_ATTR_NO_DEAD_STRIP
        SectionAttrUserLiveSupport            = 0x08000000u, // S_ATTR_LIVE_SUPPORT
        SectionAttrUserSelfModifyingCode      = 0x04000000u, // S_ATTR_SELF_MODIFYING_CODE
        SectionAttrUserDebug                  = 0x02000000u, // S_ATTR_DEBUG
  
        // Constant masks for the "flags[23:8]" field in llvm::MachO::section and
        // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_SYS)
        SectionAttrSytemSomeInstructions      = 0x00000400u, // S_ATTR_SOME_INSTRUCTIONS
        SectionAttrSytemHasExternalRelocations= 0x00000200u, // S_ATTR_EXT_RELOC
        SectionAttrSytemHasLocalRelocations   = 0x00000100u, // S_ATTR_LOC_RELOC
  
        IndirectSymbolLocal                   = 0x80000000u, // INDIRECT_SYMBOL_LOCAL
        IndirectSymbolAbsolute                = 0x40000000u, // INDIRECT_SYMBOL_ABS
  
        RebaseTypePointer                     = 1u, // REBASE_TYPE_POINTER
        RebaseTypeTextAbsolute32              = 2u, // REBASE_TYPE_TEXT_ABSOLUTE32
        RebaseTypeTextPCRelative32	    = 3u, // REBASE_TYPE_TEXT_PCREL32
  
        RebaseOpcodeMask                          = 0xF0u, // REBASE_OPCODE_MASK
        RebaseImmediateMask                       = 0x0Fu, // REBASE_IMMEDIATE_MASK
        RebaseOpcodeDone                          = 0x00u, // REBASE_OPCODE_DONE
        RebaseOpcodeSetTypeImmediate              = 0x10u, // REBASE_OPCODE_SET_TYPE_IMM
        RebaseOpcodeSetSegmentAndOffsetULEB	= 0x20u, // REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
        RebaseOpcodeAddAddressULEB                = 0x30u, // REBASE_OPCODE_ADD_ADDR_ULEB
        RebaseOpcodeAddAddressImmediateScaled	= 0x40u, // REBASE_OPCODE_ADD_ADDR_IMM_SCALED
        RebaseOpcodeDoRebaseImmediateTimes	= 0x50u, // REBASE_OPCODE_DO_REBASE_IMM_TIMES
        RebaseOpcodeDoRebaseULEBTimes             = 0x60u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES
        RebaseOpcodeDoRebaseAddAddressULEB        = 0x70u, // REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB
        RebaseOpcodeDoRebaseULEBTimesSkippingULEB = 0x80u, // REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB
  
  
        BindTypePointer           = 1u, // BIND_TYPE_POINTER
        BindTypeTextAbsolute32	= 2u, // BIND_TYPE_TEXT_ABSOLUTE32
        BindTypeTextPCRelative32	= 3u, // BIND_TYPE_TEXT_PCREL32
  
        BindSpecialDylibSelf            =  0u, // BIND_SPECIAL_DYLIB_SELF
        BindSpecialDylibMainExecutable  = -1u, // BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE
        BindSpecialDylibFlatLookup      = -2u, // BIND_SPECIAL_DYLIB_FLAT_LOOKUP
  
        BindSymbolFlagsWeakImport         = 0x1u, // BIND_SYMBOL_FLAGS_WEAK_IMPORT
        BindSymbolFlagsNonWeakDefinition	= 0x8u, // BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION
  
        BindOpcodeMask                            = 0xF0u, // BIND_OPCODE_MASK
        BindImmediateMask                         = 0x0Fu, // BIND_IMMEDIATE_MASK
        BindOpcodeDone                            = 0x00u, // BIND_OPCODE_DONE
        BindOpcodeSetDylibOrdinalImmediate        = 0x10u, // BIND_OPCODE_SET_DYLIB_ORDINAL_IMM
        BindOpcodeSetDylibOrdinalULEB             = 0x20u, // BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB
        BindOpcodeSetDylibSpecialImmediate	= 0x30u, // BIND_OPCODE_SET_DYLIB_SPECIAL_IMM
        BindOpcodeSetSymbolTrailingFlagsImmediate	= 0x40u, // BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM
        BindOpcodeSetTypeImmediate		= 0x50u, // BIND_OPCODE_SET_TYPE_IMM
        BindOpcodeSetAppendSLEB                   = 0x60u, // BIND_OPCODE_SET_ADDEND_SLEB
        BindOpcodeSetSegmentAndOffsetULEB         = 0x70u, // BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB
        BindOpcodeAddAddressULEB                  = 0x80u, // BIND_OPCODE_ADD_ADDR_ULEB
        BindOpcodeDoBind                          = 0x90u, // BIND_OPCODE_DO_BIND
        BindOpcodeDoBindAddAddressULEB		= 0xA0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB
        BindOpcodeDoBindAddAddressImmediateScaled	= 0xB0u, // BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED
        BindOpcodeDoBindULEBTimesSkippingULEB     = 0xC0u, // BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB
  
        ExportSymbolFlagsKindMask           = 0x03u, // EXPORT_SYMBOL_FLAGS_KIND_MASK
        ExportSymbolFlagsKindRegular	  = 0x00u, // EXPORT_SYMBOL_FLAGS_KIND_REGULAR
        ExportSymbolFlagsKindThreadLocal    = 0x01u, // EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL
        ExportSymbolFlagsWeakDefinition     = 0x04u, // EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION
        ExportSymbolFlagsIndirectDefinition = 0x08u, // EXPORT_SYMBOL_FLAGS_INDIRECT_DEFINITION
        ExportSymbolFlagsHasSpecializations = 0x10u, // EXPORT_SYMBOL_FLAGS_HAS_SPECIALIZATIONS
  
  
        // Constant masks for the "n_type" field in llvm::MachO::nlist and
        // llvm::MachO::nlist_64
        NlistMaskStab             = 0xe0, // N_STAB
        NlistMaskPrivateExternal	= 0x10, // N_PEXT
        NlistMaskType             = 0x0e, // N_TYPE
        NlistMaskExternal         = 0x01, // N_EXT
  
        // Constants for the "n_type & N_TYPE" llvm::MachO::nlist and
        // llvm::MachO::nlist_64
        NListTypeUndefined          = 0x0u, // N_UNDF
        NListTypeAbsolute           = 0x2u, // N_ABS
        NListTypeSection            = 0xeu, // N_SECT
        NListTypePreboundUndefined  = 0xcu, // N_PBUD
        NListTypeIndirect           = 0xau, // N_INDR
  
        // Constant masks for the "n_sect" field in llvm::MachO::nlist and
        // llvm::MachO::nlist_64
        NListSectionNoSection     = 0u, // NO_SECT
        NListSectionMaxSection    = 0xffu, // MAX_SECT
  
        NListDescWeakRef          = 0x40u,
        NListDescWeakDef          = 0x80u,
  
        // Constant values for the "n_type" field in llvm::MachO::nlist and
        // llvm::MachO::nlist_64 when "(n_type & NlistMaskStab) != 0"
        StabGlobalSymbol          = 0x20u,  // N_GSYM	
        StabFunctionName          = 0x22u,  // N_FNAME	
        StabFunction              = 0x24u,  // N_FUN	
        StabStaticSymbol          = 0x26u,  // N_STSYM	
        StabLocalCommon           = 0x28u,  // N_LCSYM	
        StabBeginSymbol           = 0x2Eu,  // N_BNSYM
        StabSourceFileOptions     = 0x3Cu,  // N_OPT	
        StabRegisterSymbol        = 0x40u,  // N_RSYM	
        StabSourceLine            = 0x44u,  // N_SLINE	
        StabEndSymbol             = 0x4Eu,  // N_ENSYM
        StabStructureType         = 0x60u,  // N_SSYM	
        StabSourceFileName        = 0x64u,  // N_SO	
        StabObjectFileName        = 0x66u,  // N_OSO	
        StabLocalSymbol           = 0x80u,  // N_LSYM	
        StabBeginIncludeFileName  = 0x82u,  // N_BINCL	
        StabIncludeFileName       = 0x84u,  // N_SOL	
        StabCompilerParameters    = 0x86u,  // N_PARAMS
        StabCompilerVersion       = 0x88u,  // N_VERSION
        StabCompilerOptLevel      = 0x8Au,  // N_OLEVEL
        StabParameter             = 0xA0u,  // N_PSYM	
        StabEndIncludeFile        = 0xA2u,  // N_EINCL	
        StabAlternateEntry        = 0xA4u,  // N_ENTRY	
        StabLeftBracket           = 0xC0u,  // N_LBRAC	
        StabDeletedIncludeFile    = 0xC2u,  // N_EXCL	
        StabRightBracket          = 0xE0u,  // N_RBRAC	
        StabBeginCommon           = 0xE2u,  // N_BCOMM	
        StabEndCommon             = 0xE4u,  // N_ECOMM	
        StabEndCommonLocal        = 0xE8u,  // N_ECOML	
        StabLength                = 0xFEu   // N_LENG	
  
      };
  
      // Structs from <mach-o/loader.h>
  
      struct mach_header {
        uint32_t magic;
        uint32_t cputype;
        uint32_t cpusubtype;
        uint32_t filetype;
        uint32_t ncmds;
        uint32_t sizeofcmds;
        uint32_t flags;
      };
  
      struct mach_header_64 {
        uint32_t magic;
        uint32_t cputype;
        uint32_t cpusubtype;
        uint32_t filetype;
        uint32_t ncmds;
        uint32_t sizeofcmds;
        uint32_t flags;
        uint32_t reserved;
      };
  
      struct load_command {
        uint32_t cmd;
        uint32_t cmdsize;
      };
  
      struct segment_command {
        uint32_t cmd;
        uint32_t cmdsize;
        char segname[16];
        uint32_t vmaddr;
        uint32_t vmsize;
        uint32_t fileoff;
        uint32_t filesize;
        uint32_t maxprot;
        uint32_t initprot;
        uint32_t nsects;
        uint32_t flags;
      };
  
      struct segment_command_64 {
        uint32_t cmd;
        uint32_t cmdsize;
        char segname[16];
        uint64_t vmaddr;
        uint64_t vmsize;
        uint64_t fileoff;
        uint64_t filesize;
        uint32_t maxprot;
        uint32_t initprot;
        uint32_t nsects;
        uint32_t flags;
      };
  
      struct section {
        char sectname[16];
        char segname[16];
        uint32_t addr;
        uint32_t size;
        uint32_t offset;
        uint32_t align;
        uint32_t reloff;
        uint32_t nreloc;
        uint32_t flags;
        uint32_t reserved1;
        uint32_t reserved2;
      };
  
      struct section_64 {
        char sectname[16];
        char segname[16];
        uint64_t addr;
        uint64_t size;
        uint32_t offset;
        uint32_t align;
        uint32_t reloff;
        uint32_t nreloc;
        uint32_t flags;
        uint32_t reserved1;
        uint32_t reserved2;
        uint32_t reserved3;
      };
  
      struct fvmlib {
        uint32_t name;
        uint32_t minor_version;
        uint32_t header_addr;
      };
  
      struct fvmlib_command {
        uint32_t  cmd;
        uint32_t cmdsize;
        struct fvmlib fvmlib;
      };
  
      struct dylib {
        uint32_t name;
        uint32_t timestamp;
        uint32_t current_version;
        uint32_t compatibility_version;
      };
  
      struct dylib_command {
        uint32_t cmd;
        uint32_t cmdsize;
        struct dylib dylib;
      };
  
      struct sub_framework_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t umbrella;
      };
  
      struct sub_client_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t client;
      };
  
      struct sub_umbrella_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t sub_umbrella;
      };
  
      struct sub_library_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t sub_library;
      };
  
      struct prebound_dylib_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t name;
        uint32_t nmodules;
        uint32_t linked_modules;
      };
  
      struct dylinker_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t name;
      };
  
      struct thread_command {
        uint32_t cmd;
        uint32_t cmdsize;
      };
  
      struct routines_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t init_address;
        uint32_t init_module;
        uint32_t reserved1;
        uint32_t reserved2;
        uint32_t reserved3;
        uint32_t reserved4;
        uint32_t reserved5;
        uint32_t reserved6;
      };
  
      struct routines_command_64 {
        uint32_t cmd;
        uint32_t cmdsize;
        uint64_t init_address;
        uint64_t init_module;
        uint64_t reserved1;
        uint64_t reserved2;
        uint64_t reserved3;
        uint64_t reserved4;
        uint64_t reserved5;
        uint64_t reserved6;
      };
  
      struct symtab_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t symoff;
        uint32_t nsyms;
        uint32_t stroff;
        uint32_t strsize;
      };
  
      struct dysymtab_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t ilocalsym;
        uint32_t nlocalsym;
        uint32_t iextdefsym;
        uint32_t nextdefsym;
        uint32_t iundefsym;
        uint32_t nundefsym;
        uint32_t tocoff;
        uint32_t ntoc;
        uint32_t modtaboff;
        uint32_t nmodtab;
        uint32_t extrefsymoff;
        uint32_t nextrefsyms;
        uint32_t indirectsymoff;
        uint32_t nindirectsyms;
        uint32_t extreloff;
        uint32_t nextrel;
        uint32_t locreloff;
        uint32_t nlocrel;
      };	
  
      struct dylib_table_of_contents {
        uint32_t symbol_index;
        uint32_t module_index;
      };	
  
      struct dylib_module {
        uint32_t module_name;
        uint32_t iextdefsym;
        uint32_t nextdefsym;
        uint32_t irefsym;
        uint32_t nrefsym;
        uint32_t ilocalsym;
        uint32_t nlocalsym;
        uint32_t iextrel;
        uint32_t nextrel;
        uint32_t iinit_iterm;
        uint32_t ninit_nterm;
        uint32_t objc_module_info_addr;
        uint32_t objc_module_info_size;
      };	
  
      struct dylib_module_64 {
        uint32_t module_name;
        uint32_t iextdefsym;
        uint32_t nextdefsym;
        uint32_t irefsym;
        uint32_t nrefsym;
        uint32_t ilocalsym;
        uint32_t nlocalsym;
        uint32_t iextrel;
        uint32_t nextrel;
        uint32_t iinit_iterm;
        uint32_t ninit_nterm;
        uint32_t objc_module_info_size;
        uint64_t objc_module_info_addr;
      };
  
      struct dylib_reference {
        uint32_t isym:24,
                 flags:8;
      };
  
  
      struct twolevel_hints_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t offset;
        uint32_t nhints;
      };
  
      struct twolevel_hint {
        uint32_t isub_image:8,
                 itoc:24;
      };
  
      struct prebind_cksum_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t cksum;
      };
  
      struct uuid_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint8_t uuid[16];
      };
  
      struct rpath_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t path;
      };
  
      struct linkedit_data_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t dataoff;
        uint32_t datasize;
      };
  
      struct encryption_info_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t cryptoff;
        uint32_t cryptsize;
        uint32_t cryptid;
      };
  
      struct version_min_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t version;
        uint32_t reserved;
      };
  
      struct dyld_info_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t rebase_off;
        uint32_t rebase_size;
        uint32_t bind_off;
        uint32_t bind_size;
        uint32_t weak_bind_off;
        uint32_t weak_bind_size;
        uint32_t lazy_bind_off;
        uint32_t lazy_bind_size;
        uint32_t export_off;
        uint32_t export_size;
      };
  
      struct symseg_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t offset;
        uint32_t size;
      };
  
      struct ident_command {
        uint32_t cmd;
        uint32_t cmdsize;
      };
  
      struct fvmfile_command {
        uint32_t cmd;
        uint32_t cmdsize;
        uint32_t name;
        uint32_t header_addr;
      };
  
  
      // Structs from <mach-o/fat.h>
      struct fat_header {
        uint32_t magic;
        uint32_t nfat_arch;
      };
  
      struct fat_arch {
        uint32_t cputype;
        uint32_t cpusubtype;
        uint32_t offset;
        uint32_t size;
        uint32_t align;
      };
  
      // Structs from <mach-o/fat.h>
      struct nlist {
        uint32_t n_strx;
        uint8_t n_type;
        uint8_t n_sect;
        int16_t n_desc;
        uint32_t n_value;
      };
  
      struct nlist_64 {
        uint32_t n_strx;
        uint8_t n_type;
        uint8_t n_sect;
        uint16_t n_desc;
        uint64_t n_value;
      };
  
      // Get/Set functions from <mach-o/nlist.h>
  
      static inline uint16_t GET_LIBRARY_ORDINAL(uint16_t n_desc)
      {
        return (((n_desc) >> 8u) & 0xffu);
      }
  
      static inline void SET_LIBRARY_ORDINAL(uint16_t &n_desc, uint8_t ordinal)
      {
        n_desc = (((n_desc) & 0x00ff) | (((ordinal) & 0xff) << 8));
      }
  
      static inline uint8_t GET_COMM_ALIGN (uint16_t n_desc)
      {
        return (n_desc >> 8u) & 0x0fu;
      }
  
      static inline void SET_COMM_ALIGN (uint16_t &n_desc, uint8_t align)
      {
        n_desc = ((n_desc & 0xf0ffu) | ((align & 0x0fu) << 8u));
      }
  
      // Enums from <mach/machine.h>
      enum {
        // Capability bits used in the definition of cpu_type.
        CPUArchMask = 0xff000000,   // Mask for architecture bits
        CPUArchABI64 = 0x01000000,  // 64 bit ABI
  
        // Constants for the cputype field.
        CPUTypeI386      = 7,
        CPUTypeX86_64    = CPUTypeI386 | CPUArchABI64,
        CPUTypeARM       = 12,
        CPUTypeSPARC     = 14,
        CPUTypePowerPC   = 18,
        CPUTypePowerPC64 = CPUTypePowerPC | CPUArchABI64,
  
  
        // Constants for the cpusubtype field.
  
        // X86
        CPUSubType_I386_ALL    = 3,
        CPUSubType_X86_64_ALL  = 3,
  
        // ARM
        CPUSubType_ARM_ALL     = 0,
        CPUSubType_ARM_V4T     = 5,
        CPUSubType_ARM_V5      = 7,
        CPUSubType_ARM_V6      = 6,
        CPUSubType_ARM_V7      = 9,
  
        // PowerPC
        CPUSubType_POWERPC_ALL = 0,
  
        CPUSubType_SPARC_ALL   = 0
      };
    } // end namespace MachO
  } // end namespace llvm
  
  #endif
  