Added support to MachO.h for many defines and structures that are needed

to Parse mach-o files. All defines have been renamed to not conflict with
#defines in mach header files, all structures were left named the same but
are in the llvm::MachO namespace.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108953 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 638 insertions, 0 deletions

diff --git a/include/llvm/Support/MachO.h b/include/llvm/Support/MachO.h
index e6fccfc17f..473bf1184c 100644
--- a/include/llvm/Support/MachO.h
+++ b/include/llvm/Support/MachO.h
@@ -14,11 +14,649 @@
 #ifndef LLVM_SUPPORT_MACHO_H
 #define LLVM_SUPPORT_MACHO_H
 
+#include <stdint.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
+      
+      // 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
+
+      // 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 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.