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      1 //===-- llvm/BinaryFormat/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_BINARYFORMAT_MACHO_H
     15 #define LLVM_BINARYFORMAT_MACHO_H
     16 
     17 #include "llvm/Support/Compiler.h"
     18 #include "llvm/Support/DataTypes.h"
     19 #include "llvm/Support/Host.h"
     20 
     21 namespace llvm {
     22 namespace MachO {
     23 // Enums from <mach-o/loader.h>
     24 enum : uint32_t {
     25   // Constants for the "magic" field in llvm::MachO::mach_header and
     26   // llvm::MachO::mach_header_64
     27   MH_MAGIC = 0xFEEDFACEu,
     28   MH_CIGAM = 0xCEFAEDFEu,
     29   MH_MAGIC_64 = 0xFEEDFACFu,
     30   MH_CIGAM_64 = 0xCFFAEDFEu,
     31   FAT_MAGIC = 0xCAFEBABEu,
     32   FAT_CIGAM = 0xBEBAFECAu,
     33   FAT_MAGIC_64 = 0xCAFEBABFu,
     34   FAT_CIGAM_64 = 0xBFBAFECAu
     35 };
     36 
     37 enum HeaderFileType {
     38   // Constants for the "filetype" field in llvm::MachO::mach_header and
     39   // llvm::MachO::mach_header_64
     40   MH_OBJECT = 0x1u,
     41   MH_EXECUTE = 0x2u,
     42   MH_FVMLIB = 0x3u,
     43   MH_CORE = 0x4u,
     44   MH_PRELOAD = 0x5u,
     45   MH_DYLIB = 0x6u,
     46   MH_DYLINKER = 0x7u,
     47   MH_BUNDLE = 0x8u,
     48   MH_DYLIB_STUB = 0x9u,
     49   MH_DSYM = 0xAu,
     50   MH_KEXT_BUNDLE = 0xBu
     51 };
     52 
     53 enum {
     54   // Constant bits for the "flags" field in llvm::MachO::mach_header and
     55   // llvm::MachO::mach_header_64
     56   MH_NOUNDEFS = 0x00000001u,
     57   MH_INCRLINK = 0x00000002u,
     58   MH_DYLDLINK = 0x00000004u,
     59   MH_BINDATLOAD = 0x00000008u,
     60   MH_PREBOUND = 0x00000010u,
     61   MH_SPLIT_SEGS = 0x00000020u,
     62   MH_LAZY_INIT = 0x00000040u,
     63   MH_TWOLEVEL = 0x00000080u,
     64   MH_FORCE_FLAT = 0x00000100u,
     65   MH_NOMULTIDEFS = 0x00000200u,
     66   MH_NOFIXPREBINDING = 0x00000400u,
     67   MH_PREBINDABLE = 0x00000800u,
     68   MH_ALLMODSBOUND = 0x00001000u,
     69   MH_SUBSECTIONS_VIA_SYMBOLS = 0x00002000u,
     70   MH_CANONICAL = 0x00004000u,
     71   MH_WEAK_DEFINES = 0x00008000u,
     72   MH_BINDS_TO_WEAK = 0x00010000u,
     73   MH_ALLOW_STACK_EXECUTION = 0x00020000u,
     74   MH_ROOT_SAFE = 0x00040000u,
     75   MH_SETUID_SAFE = 0x00080000u,
     76   MH_NO_REEXPORTED_DYLIBS = 0x00100000u,
     77   MH_PIE = 0x00200000u,
     78   MH_DEAD_STRIPPABLE_DYLIB = 0x00400000u,
     79   MH_HAS_TLV_DESCRIPTORS = 0x00800000u,
     80   MH_NO_HEAP_EXECUTION = 0x01000000u,
     81   MH_APP_EXTENSION_SAFE = 0x02000000u,
     82   MH_NLIST_OUTOFSYNC_WITH_DYLDINFO = 0x04000000u
     83 };
     84 
     85 enum : uint32_t {
     86   // Flags for the "cmd" field in llvm::MachO::load_command
     87   LC_REQ_DYLD = 0x80000000u
     88 };
     89 
     90 #define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct) LCName = LCValue,
     91 
     92 enum LoadCommandType : uint32_t {
     93 #include "llvm/BinaryFormat/MachO.def"
     94 };
     95 
     96 #undef HANDLE_LOAD_COMMAND
     97 
     98 enum : uint32_t {
     99   // Constant bits for the "flags" field in llvm::MachO::segment_command
    100   SG_HIGHVM = 0x1u,
    101   SG_FVMLIB = 0x2u,
    102   SG_NORELOC = 0x4u,
    103   SG_PROTECTED_VERSION_1 = 0x8u,
    104 
    105   // Constant masks for the "flags" field in llvm::MachO::section and
    106   // llvm::MachO::section_64
    107   SECTION_TYPE = 0x000000ffu,           // SECTION_TYPE
    108   SECTION_ATTRIBUTES = 0xffffff00u,     // SECTION_ATTRIBUTES
    109   SECTION_ATTRIBUTES_USR = 0xff000000u, // SECTION_ATTRIBUTES_USR
    110   SECTION_ATTRIBUTES_SYS = 0x00ffff00u  // SECTION_ATTRIBUTES_SYS
    111 };
    112 
    113 /// These are the section type and attributes fields.  A MachO section can
    114 /// have only one Type, but can have any of the attributes specified.
    115 enum SectionType : uint32_t {
    116   // Constant masks for the "flags[7:0]" field in llvm::MachO::section and
    117   // llvm::MachO::section_64 (mask "flags" with SECTION_TYPE)
    118 
    119   /// S_REGULAR - Regular section.
    120   S_REGULAR = 0x00u,
    121   /// S_ZEROFILL - Zero fill on demand section.
    122   S_ZEROFILL = 0x01u,
    123   /// S_CSTRING_LITERALS - Section with literal C strings.
    124   S_CSTRING_LITERALS = 0x02u,
    125   /// S_4BYTE_LITERALS - Section with 4 byte literals.
    126   S_4BYTE_LITERALS = 0x03u,
    127   /// S_8BYTE_LITERALS - Section with 8 byte literals.
    128   S_8BYTE_LITERALS = 0x04u,
    129   /// S_LITERAL_POINTERS - Section with pointers to literals.
    130   S_LITERAL_POINTERS = 0x05u,
    131   /// S_NON_LAZY_SYMBOL_POINTERS - Section with non-lazy symbol pointers.
    132   S_NON_LAZY_SYMBOL_POINTERS = 0x06u,
    133   /// S_LAZY_SYMBOL_POINTERS - Section with lazy symbol pointers.
    134   S_LAZY_SYMBOL_POINTERS = 0x07u,
    135   /// S_SYMBOL_STUBS - Section with symbol stubs, byte size of stub in
    136   /// the Reserved2 field.
    137   S_SYMBOL_STUBS = 0x08u,
    138   /// S_MOD_INIT_FUNC_POINTERS - Section with only function pointers for
    139   /// initialization.
    140   S_MOD_INIT_FUNC_POINTERS = 0x09u,
    141   /// S_MOD_TERM_FUNC_POINTERS - Section with only function pointers for
    142   /// termination.
    143   S_MOD_TERM_FUNC_POINTERS = 0x0au,
    144   /// S_COALESCED - Section contains symbols that are to be coalesced.
    145   S_COALESCED = 0x0bu,
    146   /// S_GB_ZEROFILL - Zero fill on demand section (that can be larger than 4
    147   /// gigabytes).
    148   S_GB_ZEROFILL = 0x0cu,
    149   /// S_INTERPOSING - Section with only pairs of function pointers for
    150   /// interposing.
    151   S_INTERPOSING = 0x0du,
    152   /// S_16BYTE_LITERALS - Section with only 16 byte literals.
    153   S_16BYTE_LITERALS = 0x0eu,
    154   /// S_DTRACE_DOF - Section contains DTrace Object Format.
    155   S_DTRACE_DOF = 0x0fu,
    156   /// S_LAZY_DYLIB_SYMBOL_POINTERS - Section with lazy symbol pointers to
    157   /// lazy loaded dylibs.
    158   S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10u,
    159   /// S_THREAD_LOCAL_REGULAR - Thread local data section.
    160   S_THREAD_LOCAL_REGULAR = 0x11u,
    161   /// S_THREAD_LOCAL_ZEROFILL - Thread local zerofill section.
    162   S_THREAD_LOCAL_ZEROFILL = 0x12u,
    163   /// S_THREAD_LOCAL_VARIABLES - Section with thread local variable
    164   /// structure data.
    165   S_THREAD_LOCAL_VARIABLES = 0x13u,
    166   /// S_THREAD_LOCAL_VARIABLE_POINTERS - Section with pointers to thread
    167   /// local structures.
    168   S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14u,
    169   /// S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local
    170   /// variable initialization pointers to functions.
    171   S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15u,
    172 
    173   LAST_KNOWN_SECTION_TYPE = S_THREAD_LOCAL_INIT_FUNCTION_POINTERS
    174 };
    175 
    176 enum : uint32_t {
    177   // Constant masks for the "flags[31:24]" field in llvm::MachO::section and
    178   // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_USR)
    179 
    180   /// S_ATTR_PURE_INSTRUCTIONS - Section contains only true machine
    181   /// instructions.
    182   S_ATTR_PURE_INSTRUCTIONS = 0x80000000u,
    183   /// S_ATTR_NO_TOC - Section contains coalesced symbols that are not to be
    184   /// in a ranlib table of contents.
    185   S_ATTR_NO_TOC = 0x40000000u,
    186   /// S_ATTR_STRIP_STATIC_SYMS - Ok to strip static symbols in this section
    187   /// in files with the MY_DYLDLINK flag.
    188   S_ATTR_STRIP_STATIC_SYMS = 0x20000000u,
    189   /// S_ATTR_NO_DEAD_STRIP - No dead stripping.
    190   S_ATTR_NO_DEAD_STRIP = 0x10000000u,
    191   /// S_ATTR_LIVE_SUPPORT - Blocks are live if they reference live blocks.
    192   S_ATTR_LIVE_SUPPORT = 0x08000000u,
    193   /// S_ATTR_SELF_MODIFYING_CODE - Used with i386 code stubs written on by
    194   /// dyld.
    195   S_ATTR_SELF_MODIFYING_CODE = 0x04000000u,
    196   /// S_ATTR_DEBUG - A debug section.
    197   S_ATTR_DEBUG = 0x02000000u,
    198 
    199   // Constant masks for the "flags[23:8]" field in llvm::MachO::section and
    200   // llvm::MachO::section_64 (mask "flags" with SECTION_ATTRIBUTES_SYS)
    201 
    202   /// S_ATTR_SOME_INSTRUCTIONS - Section contains some machine instructions.
    203   S_ATTR_SOME_INSTRUCTIONS = 0x00000400u,
    204   /// S_ATTR_EXT_RELOC - Section has external relocation entries.
    205   S_ATTR_EXT_RELOC = 0x00000200u,
    206   /// S_ATTR_LOC_RELOC - Section has local relocation entries.
    207   S_ATTR_LOC_RELOC = 0x00000100u,
    208 
    209   // Constant masks for the value of an indirect symbol in an indirect
    210   // symbol table
    211   INDIRECT_SYMBOL_LOCAL = 0x80000000u,
    212   INDIRECT_SYMBOL_ABS = 0x40000000u
    213 };
    214 
    215 enum DataRegionType {
    216   // Constants for the "kind" field in a data_in_code_entry structure
    217   DICE_KIND_DATA = 1u,
    218   DICE_KIND_JUMP_TABLE8 = 2u,
    219   DICE_KIND_JUMP_TABLE16 = 3u,
    220   DICE_KIND_JUMP_TABLE32 = 4u,
    221   DICE_KIND_ABS_JUMP_TABLE32 = 5u
    222 };
    223 
    224 enum RebaseType {
    225   REBASE_TYPE_POINTER = 1u,
    226   REBASE_TYPE_TEXT_ABSOLUTE32 = 2u,
    227   REBASE_TYPE_TEXT_PCREL32 = 3u
    228 };
    229 
    230 enum { REBASE_OPCODE_MASK = 0xF0u, REBASE_IMMEDIATE_MASK = 0x0Fu };
    231 
    232 enum RebaseOpcode {
    233   REBASE_OPCODE_DONE = 0x00u,
    234   REBASE_OPCODE_SET_TYPE_IMM = 0x10u,
    235   REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x20u,
    236   REBASE_OPCODE_ADD_ADDR_ULEB = 0x30u,
    237   REBASE_OPCODE_ADD_ADDR_IMM_SCALED = 0x40u,
    238   REBASE_OPCODE_DO_REBASE_IMM_TIMES = 0x50u,
    239   REBASE_OPCODE_DO_REBASE_ULEB_TIMES = 0x60u,
    240   REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB = 0x70u,
    241   REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB = 0x80u
    242 };
    243 
    244 enum BindType {
    245   BIND_TYPE_POINTER = 1u,
    246   BIND_TYPE_TEXT_ABSOLUTE32 = 2u,
    247   BIND_TYPE_TEXT_PCREL32 = 3u
    248 };
    249 
    250 enum BindSpecialDylib {
    251   BIND_SPECIAL_DYLIB_SELF = 0,
    252   BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE = -1,
    253   BIND_SPECIAL_DYLIB_FLAT_LOOKUP = -2
    254 };
    255 
    256 enum {
    257   BIND_SYMBOL_FLAGS_WEAK_IMPORT = 0x1u,
    258   BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION = 0x8u,
    259 
    260   BIND_OPCODE_MASK = 0xF0u,
    261   BIND_IMMEDIATE_MASK = 0x0Fu
    262 };
    263 
    264 enum BindOpcode {
    265   BIND_OPCODE_DONE = 0x00u,
    266   BIND_OPCODE_SET_DYLIB_ORDINAL_IMM = 0x10u,
    267   BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB = 0x20u,
    268   BIND_OPCODE_SET_DYLIB_SPECIAL_IMM = 0x30u,
    269   BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM = 0x40u,
    270   BIND_OPCODE_SET_TYPE_IMM = 0x50u,
    271   BIND_OPCODE_SET_ADDEND_SLEB = 0x60u,
    272   BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x70u,
    273   BIND_OPCODE_ADD_ADDR_ULEB = 0x80u,
    274   BIND_OPCODE_DO_BIND = 0x90u,
    275   BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB = 0xA0u,
    276   BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED = 0xB0u,
    277   BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB = 0xC0u
    278 };
    279 
    280 enum {
    281   EXPORT_SYMBOL_FLAGS_KIND_MASK = 0x03u,
    282   EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION = 0x04u,
    283   EXPORT_SYMBOL_FLAGS_REEXPORT = 0x08u,
    284   EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER = 0x10u
    285 };
    286 
    287 enum ExportSymbolKind {
    288   EXPORT_SYMBOL_FLAGS_KIND_REGULAR = 0x00u,
    289   EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL = 0x01u,
    290   EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE = 0x02u
    291 };
    292 
    293 enum {
    294   // Constant masks for the "n_type" field in llvm::MachO::nlist and
    295   // llvm::MachO::nlist_64
    296   N_STAB = 0xe0,
    297   N_PEXT = 0x10,
    298   N_TYPE = 0x0e,
    299   N_EXT = 0x01
    300 };
    301 
    302 enum NListType : uint8_t {
    303   // Constants for the "n_type & N_TYPE" llvm::MachO::nlist and
    304   // llvm::MachO::nlist_64
    305   N_UNDF = 0x0u,
    306   N_ABS = 0x2u,
    307   N_SECT = 0xeu,
    308   N_PBUD = 0xcu,
    309   N_INDR = 0xau
    310 };
    311 
    312 enum SectionOrdinal {
    313   // Constants for the "n_sect" field in llvm::MachO::nlist and
    314   // llvm::MachO::nlist_64
    315   NO_SECT = 0u,
    316   MAX_SECT = 0xffu
    317 };
    318 
    319 enum {
    320   // Constant masks for the "n_desc" field in llvm::MachO::nlist and
    321   // llvm::MachO::nlist_64
    322   // The low 3 bits are the for the REFERENCE_TYPE.
    323   REFERENCE_TYPE = 0x7,
    324   REFERENCE_FLAG_UNDEFINED_NON_LAZY = 0,
    325   REFERENCE_FLAG_UNDEFINED_LAZY = 1,
    326   REFERENCE_FLAG_DEFINED = 2,
    327   REFERENCE_FLAG_PRIVATE_DEFINED = 3,
    328   REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY = 4,
    329   REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY = 5,
    330   // Flag bits (some overlap with the library ordinal bits).
    331   N_ARM_THUMB_DEF = 0x0008u,
    332   REFERENCED_DYNAMICALLY = 0x0010u,
    333   N_NO_DEAD_STRIP = 0x0020u,
    334   N_WEAK_REF = 0x0040u,
    335   N_WEAK_DEF = 0x0080u,
    336   N_SYMBOL_RESOLVER = 0x0100u,
    337   N_ALT_ENTRY = 0x0200u,
    338   // For undefined symbols coming from libraries, see GET_LIBRARY_ORDINAL()
    339   // as these are in the top 8 bits.
    340   SELF_LIBRARY_ORDINAL = 0x0,
    341   MAX_LIBRARY_ORDINAL = 0xfd,
    342   DYNAMIC_LOOKUP_ORDINAL = 0xfe,
    343   EXECUTABLE_ORDINAL = 0xff
    344 };
    345 
    346 enum StabType {
    347   // Constant values for the "n_type" field in llvm::MachO::nlist and
    348   // llvm::MachO::nlist_64 when "(n_type & N_STAB) != 0"
    349   N_GSYM = 0x20u,
    350   N_FNAME = 0x22u,
    351   N_FUN = 0x24u,
    352   N_STSYM = 0x26u,
    353   N_LCSYM = 0x28u,
    354   N_BNSYM = 0x2Eu,
    355   N_PC = 0x30u,
    356   N_AST = 0x32u,
    357   N_OPT = 0x3Cu,
    358   N_RSYM = 0x40u,
    359   N_SLINE = 0x44u,
    360   N_ENSYM = 0x4Eu,
    361   N_SSYM = 0x60u,
    362   N_SO = 0x64u,
    363   N_OSO = 0x66u,
    364   N_LSYM = 0x80u,
    365   N_BINCL = 0x82u,
    366   N_SOL = 0x84u,
    367   N_PARAMS = 0x86u,
    368   N_VERSION = 0x88u,
    369   N_OLEVEL = 0x8Au,
    370   N_PSYM = 0xA0u,
    371   N_EINCL = 0xA2u,
    372   N_ENTRY = 0xA4u,
    373   N_LBRAC = 0xC0u,
    374   N_EXCL = 0xC2u,
    375   N_RBRAC = 0xE0u,
    376   N_BCOMM = 0xE2u,
    377   N_ECOMM = 0xE4u,
    378   N_ECOML = 0xE8u,
    379   N_LENG = 0xFEu
    380 };
    381 
    382 enum : uint32_t {
    383   // Constant values for the r_symbolnum field in an
    384   // llvm::MachO::relocation_info structure when r_extern is 0.
    385   R_ABS = 0,
    386 
    387   // Constant bits for the r_address field in an
    388   // llvm::MachO::relocation_info structure.
    389   R_SCATTERED = 0x80000000
    390 };
    391 
    392 enum RelocationInfoType {
    393   // Constant values for the r_type field in an
    394   // llvm::MachO::relocation_info or llvm::MachO::scattered_relocation_info
    395   // structure.
    396   GENERIC_RELOC_VANILLA = 0,
    397   GENERIC_RELOC_PAIR = 1,
    398   GENERIC_RELOC_SECTDIFF = 2,
    399   GENERIC_RELOC_PB_LA_PTR = 3,
    400   GENERIC_RELOC_LOCAL_SECTDIFF = 4,
    401   GENERIC_RELOC_TLV = 5,
    402 
    403   // Constant values for the r_type field in a PowerPC architecture
    404   // llvm::MachO::relocation_info or llvm::MachO::scattered_relocation_info
    405   // structure.
    406   PPC_RELOC_VANILLA = GENERIC_RELOC_VANILLA,
    407   PPC_RELOC_PAIR = GENERIC_RELOC_PAIR,
    408   PPC_RELOC_BR14 = 2,
    409   PPC_RELOC_BR24 = 3,
    410   PPC_RELOC_HI16 = 4,
    411   PPC_RELOC_LO16 = 5,
    412   PPC_RELOC_HA16 = 6,
    413   PPC_RELOC_LO14 = 7,
    414   PPC_RELOC_SECTDIFF = 8,
    415   PPC_RELOC_PB_LA_PTR = 9,
    416   PPC_RELOC_HI16_SECTDIFF = 10,
    417   PPC_RELOC_LO16_SECTDIFF = 11,
    418   PPC_RELOC_HA16_SECTDIFF = 12,
    419   PPC_RELOC_JBSR = 13,
    420   PPC_RELOC_LO14_SECTDIFF = 14,
    421   PPC_RELOC_LOCAL_SECTDIFF = 15,
    422 
    423   // Constant values for the r_type field in an ARM architecture
    424   // llvm::MachO::relocation_info or llvm::MachO::scattered_relocation_info
    425   // structure.
    426   ARM_RELOC_VANILLA = GENERIC_RELOC_VANILLA,
    427   ARM_RELOC_PAIR = GENERIC_RELOC_PAIR,
    428   ARM_RELOC_SECTDIFF = GENERIC_RELOC_SECTDIFF,
    429   ARM_RELOC_LOCAL_SECTDIFF = 3,
    430   ARM_RELOC_PB_LA_PTR = 4,
    431   ARM_RELOC_BR24 = 5,
    432   ARM_THUMB_RELOC_BR22 = 6,
    433   ARM_THUMB_32BIT_BRANCH = 7, // obsolete
    434   ARM_RELOC_HALF = 8,
    435   ARM_RELOC_HALF_SECTDIFF = 9,
    436 
    437   // Constant values for the r_type field in an ARM64 architecture
    438   // llvm::MachO::relocation_info or llvm::MachO::scattered_relocation_info
    439   // structure.
    440 
    441   // For pointers.
    442   ARM64_RELOC_UNSIGNED = 0,
    443   // Must be followed by an ARM64_RELOC_UNSIGNED
    444   ARM64_RELOC_SUBTRACTOR = 1,
    445   // A B/BL instruction with 26-bit displacement.
    446   ARM64_RELOC_BRANCH26 = 2,
    447   // PC-rel distance to page of target.
    448   ARM64_RELOC_PAGE21 = 3,
    449   // Offset within page, scaled by r_length.
    450   ARM64_RELOC_PAGEOFF12 = 4,
    451   // PC-rel distance to page of GOT slot.
    452   ARM64_RELOC_GOT_LOAD_PAGE21 = 5,
    453   // Offset within page of GOT slot, scaled by r_length.
    454   ARM64_RELOC_GOT_LOAD_PAGEOFF12 = 6,
    455   // For pointers to GOT slots.
    456   ARM64_RELOC_POINTER_TO_GOT = 7,
    457   // PC-rel distance to page of TLVP slot.
    458   ARM64_RELOC_TLVP_LOAD_PAGE21 = 8,
    459   // Offset within page of TLVP slot, scaled by r_length.
    460   ARM64_RELOC_TLVP_LOAD_PAGEOFF12 = 9,
    461   // Must be followed by ARM64_RELOC_PAGE21 or ARM64_RELOC_PAGEOFF12.
    462   ARM64_RELOC_ADDEND = 10,
    463 
    464   // Constant values for the r_type field in an x86_64 architecture
    465   // llvm::MachO::relocation_info or llvm::MachO::scattered_relocation_info
    466   // structure
    467   X86_64_RELOC_UNSIGNED = 0,
    468   X86_64_RELOC_SIGNED = 1,
    469   X86_64_RELOC_BRANCH = 2,
    470   X86_64_RELOC_GOT_LOAD = 3,
    471   X86_64_RELOC_GOT = 4,
    472   X86_64_RELOC_SUBTRACTOR = 5,
    473   X86_64_RELOC_SIGNED_1 = 6,
    474   X86_64_RELOC_SIGNED_2 = 7,
    475   X86_64_RELOC_SIGNED_4 = 8,
    476   X86_64_RELOC_TLV = 9
    477 };
    478 
    479 // Values for segment_command.initprot.
    480 // From <mach/vm_prot.h>
    481 enum { VM_PROT_READ = 0x1, VM_PROT_WRITE = 0x2, VM_PROT_EXECUTE = 0x4 };
    482 
    483 // Values for platform field in build_version_command.
    484 enum {
    485   PLATFORM_MACOS = 1,
    486   PLATFORM_IOS = 2,
    487   PLATFORM_TVOS = 3,
    488   PLATFORM_WATCHOS = 4,
    489   PLATFORM_BRIDGEOS = 5
    490 };
    491 
    492 // Values for tools enum in build_tool_version.
    493 enum { TOOL_CLANG = 1, TOOL_SWIFT = 2, TOOL_LD = 3 };
    494 
    495 // Structs from <mach-o/loader.h>
    496 
    497 struct mach_header {
    498   uint32_t magic;
    499   uint32_t cputype;
    500   uint32_t cpusubtype;
    501   uint32_t filetype;
    502   uint32_t ncmds;
    503   uint32_t sizeofcmds;
    504   uint32_t flags;
    505 };
    506 
    507 struct mach_header_64 {
    508   uint32_t magic;
    509   uint32_t cputype;
    510   uint32_t cpusubtype;
    511   uint32_t filetype;
    512   uint32_t ncmds;
    513   uint32_t sizeofcmds;
    514   uint32_t flags;
    515   uint32_t reserved;
    516 };
    517 
    518 struct load_command {
    519   uint32_t cmd;
    520   uint32_t cmdsize;
    521 };
    522 
    523 struct segment_command {
    524   uint32_t cmd;
    525   uint32_t cmdsize;
    526   char segname[16];
    527   uint32_t vmaddr;
    528   uint32_t vmsize;
    529   uint32_t fileoff;
    530   uint32_t filesize;
    531   uint32_t maxprot;
    532   uint32_t initprot;
    533   uint32_t nsects;
    534   uint32_t flags;
    535 };
    536 
    537 struct segment_command_64 {
    538   uint32_t cmd;
    539   uint32_t cmdsize;
    540   char segname[16];
    541   uint64_t vmaddr;
    542   uint64_t vmsize;
    543   uint64_t fileoff;
    544   uint64_t filesize;
    545   uint32_t maxprot;
    546   uint32_t initprot;
    547   uint32_t nsects;
    548   uint32_t flags;
    549 };
    550 
    551 struct section {
    552   char sectname[16];
    553   char segname[16];
    554   uint32_t addr;
    555   uint32_t size;
    556   uint32_t offset;
    557   uint32_t align;
    558   uint32_t reloff;
    559   uint32_t nreloc;
    560   uint32_t flags;
    561   uint32_t reserved1;
    562   uint32_t reserved2;
    563 };
    564 
    565 struct section_64 {
    566   char sectname[16];
    567   char segname[16];
    568   uint64_t addr;
    569   uint64_t size;
    570   uint32_t offset;
    571   uint32_t align;
    572   uint32_t reloff;
    573   uint32_t nreloc;
    574   uint32_t flags;
    575   uint32_t reserved1;
    576   uint32_t reserved2;
    577   uint32_t reserved3;
    578 };
    579 
    580 struct fvmlib {
    581   uint32_t name;
    582   uint32_t minor_version;
    583   uint32_t header_addr;
    584 };
    585 
    586 // The fvmlib_command is obsolete and no longer supported.
    587 struct fvmlib_command {
    588   uint32_t cmd;
    589   uint32_t cmdsize;
    590   struct fvmlib fvmlib;
    591 };
    592 
    593 struct dylib {
    594   uint32_t name;
    595   uint32_t timestamp;
    596   uint32_t current_version;
    597   uint32_t compatibility_version;
    598 };
    599 
    600 struct dylib_command {
    601   uint32_t cmd;
    602   uint32_t cmdsize;
    603   struct dylib dylib;
    604 };
    605 
    606 struct sub_framework_command {
    607   uint32_t cmd;
    608   uint32_t cmdsize;
    609   uint32_t umbrella;
    610 };
    611 
    612 struct sub_client_command {
    613   uint32_t cmd;
    614   uint32_t cmdsize;
    615   uint32_t client;
    616 };
    617 
    618 struct sub_umbrella_command {
    619   uint32_t cmd;
    620   uint32_t cmdsize;
    621   uint32_t sub_umbrella;
    622 };
    623 
    624 struct sub_library_command {
    625   uint32_t cmd;
    626   uint32_t cmdsize;
    627   uint32_t sub_library;
    628 };
    629 
    630 // The prebound_dylib_command is obsolete and no longer supported.
    631 struct prebound_dylib_command {
    632   uint32_t cmd;
    633   uint32_t cmdsize;
    634   uint32_t name;
    635   uint32_t nmodules;
    636   uint32_t linked_modules;
    637 };
    638 
    639 struct dylinker_command {
    640   uint32_t cmd;
    641   uint32_t cmdsize;
    642   uint32_t name;
    643 };
    644 
    645 struct thread_command {
    646   uint32_t cmd;
    647   uint32_t cmdsize;
    648 };
    649 
    650 struct routines_command {
    651   uint32_t cmd;
    652   uint32_t cmdsize;
    653   uint32_t init_address;
    654   uint32_t init_module;
    655   uint32_t reserved1;
    656   uint32_t reserved2;
    657   uint32_t reserved3;
    658   uint32_t reserved4;
    659   uint32_t reserved5;
    660   uint32_t reserved6;
    661 };
    662 
    663 struct routines_command_64 {
    664   uint32_t cmd;
    665   uint32_t cmdsize;
    666   uint64_t init_address;
    667   uint64_t init_module;
    668   uint64_t reserved1;
    669   uint64_t reserved2;
    670   uint64_t reserved3;
    671   uint64_t reserved4;
    672   uint64_t reserved5;
    673   uint64_t reserved6;
    674 };
    675 
    676 struct symtab_command {
    677   uint32_t cmd;
    678   uint32_t cmdsize;
    679   uint32_t symoff;
    680   uint32_t nsyms;
    681   uint32_t stroff;
    682   uint32_t strsize;
    683 };
    684 
    685 struct dysymtab_command {
    686   uint32_t cmd;
    687   uint32_t cmdsize;
    688   uint32_t ilocalsym;
    689   uint32_t nlocalsym;
    690   uint32_t iextdefsym;
    691   uint32_t nextdefsym;
    692   uint32_t iundefsym;
    693   uint32_t nundefsym;
    694   uint32_t tocoff;
    695   uint32_t ntoc;
    696   uint32_t modtaboff;
    697   uint32_t nmodtab;
    698   uint32_t extrefsymoff;
    699   uint32_t nextrefsyms;
    700   uint32_t indirectsymoff;
    701   uint32_t nindirectsyms;
    702   uint32_t extreloff;
    703   uint32_t nextrel;
    704   uint32_t locreloff;
    705   uint32_t nlocrel;
    706 };
    707 
    708 struct dylib_table_of_contents {
    709   uint32_t symbol_index;
    710   uint32_t module_index;
    711 };
    712 
    713 struct dylib_module {
    714   uint32_t module_name;
    715   uint32_t iextdefsym;
    716   uint32_t nextdefsym;
    717   uint32_t irefsym;
    718   uint32_t nrefsym;
    719   uint32_t ilocalsym;
    720   uint32_t nlocalsym;
    721   uint32_t iextrel;
    722   uint32_t nextrel;
    723   uint32_t iinit_iterm;
    724   uint32_t ninit_nterm;
    725   uint32_t objc_module_info_addr;
    726   uint32_t objc_module_info_size;
    727 };
    728 
    729 struct dylib_module_64 {
    730   uint32_t module_name;
    731   uint32_t iextdefsym;
    732   uint32_t nextdefsym;
    733   uint32_t irefsym;
    734   uint32_t nrefsym;
    735   uint32_t ilocalsym;
    736   uint32_t nlocalsym;
    737   uint32_t iextrel;
    738   uint32_t nextrel;
    739   uint32_t iinit_iterm;
    740   uint32_t ninit_nterm;
    741   uint32_t objc_module_info_size;
    742   uint64_t objc_module_info_addr;
    743 };
    744 
    745 struct dylib_reference {
    746   uint32_t isym : 24, flags : 8;
    747 };
    748 
    749 // The twolevel_hints_command is obsolete and no longer supported.
    750 struct twolevel_hints_command {
    751   uint32_t cmd;
    752   uint32_t cmdsize;
    753   uint32_t offset;
    754   uint32_t nhints;
    755 };
    756 
    757 // The twolevel_hints_command is obsolete and no longer supported.
    758 struct twolevel_hint {
    759   uint32_t isub_image : 8, itoc : 24;
    760 };
    761 
    762 // The prebind_cksum_command is obsolete and no longer supported.
    763 struct prebind_cksum_command {
    764   uint32_t cmd;
    765   uint32_t cmdsize;
    766   uint32_t cksum;
    767 };
    768 
    769 struct uuid_command {
    770   uint32_t cmd;
    771   uint32_t cmdsize;
    772   uint8_t uuid[16];
    773 };
    774 
    775 struct rpath_command {
    776   uint32_t cmd;
    777   uint32_t cmdsize;
    778   uint32_t path;
    779 };
    780 
    781 struct linkedit_data_command {
    782   uint32_t cmd;
    783   uint32_t cmdsize;
    784   uint32_t dataoff;
    785   uint32_t datasize;
    786 };
    787 
    788 struct data_in_code_entry {
    789   uint32_t offset;
    790   uint16_t length;
    791   uint16_t kind;
    792 };
    793 
    794 struct source_version_command {
    795   uint32_t cmd;
    796   uint32_t cmdsize;
    797   uint64_t version;
    798 };
    799 
    800 struct encryption_info_command {
    801   uint32_t cmd;
    802   uint32_t cmdsize;
    803   uint32_t cryptoff;
    804   uint32_t cryptsize;
    805   uint32_t cryptid;
    806 };
    807 
    808 struct encryption_info_command_64 {
    809   uint32_t cmd;
    810   uint32_t cmdsize;
    811   uint32_t cryptoff;
    812   uint32_t cryptsize;
    813   uint32_t cryptid;
    814   uint32_t pad;
    815 };
    816 
    817 struct version_min_command {
    818   uint32_t cmd;     // LC_VERSION_MIN_MACOSX or
    819                     // LC_VERSION_MIN_IPHONEOS
    820   uint32_t cmdsize; // sizeof(struct version_min_command)
    821   uint32_t version; // X.Y.Z is encoded in nibbles xxxx.yy.zz
    822   uint32_t sdk;     // X.Y.Z is encoded in nibbles xxxx.yy.zz
    823 };
    824 
    825 struct note_command {
    826   uint32_t cmd;        // LC_NOTE
    827   uint32_t cmdsize;    // sizeof(struct note_command)
    828   char data_owner[16]; // owner name for this LC_NOTE
    829   uint64_t offset;     // file offset of this data
    830   uint64_t size;       // length of data region
    831 };
    832 
    833 struct build_tool_version {
    834   uint32_t tool;    // enum for the tool
    835   uint32_t version; // version of the tool
    836 };
    837 
    838 struct build_version_command {
    839   uint32_t cmd;      // LC_BUILD_VERSION
    840   uint32_t cmdsize;  // sizeof(struct build_version_command) +
    841                      // ntools * sizeof(struct build_tool_version)
    842   uint32_t platform; // platform
    843   uint32_t minos;    // X.Y.Z is encoded in nibbles xxxx.yy.zz
    844   uint32_t sdk;      // X.Y.Z is encoded in nibbles xxxx.yy.zz
    845   uint32_t ntools;   // number of tool entries following this
    846 };
    847 
    848 struct dyld_info_command {
    849   uint32_t cmd;
    850   uint32_t cmdsize;
    851   uint32_t rebase_off;
    852   uint32_t rebase_size;
    853   uint32_t bind_off;
    854   uint32_t bind_size;
    855   uint32_t weak_bind_off;
    856   uint32_t weak_bind_size;
    857   uint32_t lazy_bind_off;
    858   uint32_t lazy_bind_size;
    859   uint32_t export_off;
    860   uint32_t export_size;
    861 };
    862 
    863 struct linker_option_command {
    864   uint32_t cmd;
    865   uint32_t cmdsize;
    866   uint32_t count;
    867 };
    868 
    869 // The symseg_command is obsolete and no longer supported.
    870 struct symseg_command {
    871   uint32_t cmd;
    872   uint32_t cmdsize;
    873   uint32_t offset;
    874   uint32_t size;
    875 };
    876 
    877 // The ident_command is obsolete and no longer supported.
    878 struct ident_command {
    879   uint32_t cmd;
    880   uint32_t cmdsize;
    881 };
    882 
    883 // The fvmfile_command is obsolete and no longer supported.
    884 struct fvmfile_command {
    885   uint32_t cmd;
    886   uint32_t cmdsize;
    887   uint32_t name;
    888   uint32_t header_addr;
    889 };
    890 
    891 struct tlv_descriptor_32 {
    892   uint32_t thunk;
    893   uint32_t key;
    894   uint32_t offset;
    895 };
    896 
    897 struct tlv_descriptor_64 {
    898   uint64_t thunk;
    899   uint64_t key;
    900   uint64_t offset;
    901 };
    902 
    903 struct tlv_descriptor {
    904   uintptr_t thunk;
    905   uintptr_t key;
    906   uintptr_t offset;
    907 };
    908 
    909 struct entry_point_command {
    910   uint32_t cmd;
    911   uint32_t cmdsize;
    912   uint64_t entryoff;
    913   uint64_t stacksize;
    914 };
    915 
    916 // Structs from <mach-o/fat.h>
    917 struct fat_header {
    918   uint32_t magic;
    919   uint32_t nfat_arch;
    920 };
    921 
    922 struct fat_arch {
    923   uint32_t cputype;
    924   uint32_t cpusubtype;
    925   uint32_t offset;
    926   uint32_t size;
    927   uint32_t align;
    928 };
    929 
    930 struct fat_arch_64 {
    931   uint32_t cputype;
    932   uint32_t cpusubtype;
    933   uint64_t offset;
    934   uint64_t size;
    935   uint32_t align;
    936   uint32_t reserved;
    937 };
    938 
    939 // Structs from <mach-o/reloc.h>
    940 struct relocation_info {
    941   int32_t r_address;
    942   uint32_t r_symbolnum : 24, r_pcrel : 1, r_length : 2, r_extern : 1,
    943       r_type : 4;
    944 };
    945 
    946 struct scattered_relocation_info {
    947 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && (BYTE_ORDER == BIG_ENDIAN)
    948   uint32_t r_scattered : 1, r_pcrel : 1, r_length : 2, r_type : 4,
    949       r_address : 24;
    950 #else
    951   uint32_t r_address : 24, r_type : 4, r_length : 2, r_pcrel : 1,
    952       r_scattered : 1;
    953 #endif
    954   int32_t r_value;
    955 };
    956 
    957 // Structs NOT from <mach-o/reloc.h>, but that make LLVM's life easier
    958 struct any_relocation_info {
    959   uint32_t r_word0, r_word1;
    960 };
    961 
    962 // Structs from <mach-o/nlist.h>
    963 struct nlist_base {
    964   uint32_t n_strx;
    965   uint8_t n_type;
    966   uint8_t n_sect;
    967   uint16_t n_desc;
    968 };
    969 
    970 struct nlist {
    971   uint32_t n_strx;
    972   uint8_t n_type;
    973   uint8_t n_sect;
    974   int16_t n_desc;
    975   uint32_t n_value;
    976 };
    977 
    978 struct nlist_64 {
    979   uint32_t n_strx;
    980   uint8_t n_type;
    981   uint8_t n_sect;
    982   uint16_t n_desc;
    983   uint64_t n_value;
    984 };
    985 
    986 // Byte order swapping functions for MachO structs
    987 
    988 inline void swapStruct(fat_header &mh) {
    989   sys::swapByteOrder(mh.magic);
    990   sys::swapByteOrder(mh.nfat_arch);
    991 }
    992 
    993 inline void swapStruct(fat_arch &mh) {
    994   sys::swapByteOrder(mh.cputype);
    995   sys::swapByteOrder(mh.cpusubtype);
    996   sys::swapByteOrder(mh.offset);
    997   sys::swapByteOrder(mh.size);
    998   sys::swapByteOrder(mh.align);
    999 }
   1000 
   1001 inline void swapStruct(fat_arch_64 &mh) {
   1002   sys::swapByteOrder(mh.cputype);
   1003   sys::swapByteOrder(mh.cpusubtype);
   1004   sys::swapByteOrder(mh.offset);
   1005   sys::swapByteOrder(mh.size);
   1006   sys::swapByteOrder(mh.align);
   1007   sys::swapByteOrder(mh.reserved);
   1008 }
   1009 
   1010 inline void swapStruct(mach_header &mh) {
   1011   sys::swapByteOrder(mh.magic);
   1012   sys::swapByteOrder(mh.cputype);
   1013   sys::swapByteOrder(mh.cpusubtype);
   1014   sys::swapByteOrder(mh.filetype);
   1015   sys::swapByteOrder(mh.ncmds);
   1016   sys::swapByteOrder(mh.sizeofcmds);
   1017   sys::swapByteOrder(mh.flags);
   1018 }
   1019 
   1020 inline void swapStruct(mach_header_64 &H) {
   1021   sys::swapByteOrder(H.magic);
   1022   sys::swapByteOrder(H.cputype);
   1023   sys::swapByteOrder(H.cpusubtype);
   1024   sys::swapByteOrder(H.filetype);
   1025   sys::swapByteOrder(H.ncmds);
   1026   sys::swapByteOrder(H.sizeofcmds);
   1027   sys::swapByteOrder(H.flags);
   1028   sys::swapByteOrder(H.reserved);
   1029 }
   1030 
   1031 inline void swapStruct(load_command &lc) {
   1032   sys::swapByteOrder(lc.cmd);
   1033   sys::swapByteOrder(lc.cmdsize);
   1034 }
   1035 
   1036 inline void swapStruct(symtab_command &lc) {
   1037   sys::swapByteOrder(lc.cmd);
   1038   sys::swapByteOrder(lc.cmdsize);
   1039   sys::swapByteOrder(lc.symoff);
   1040   sys::swapByteOrder(lc.nsyms);
   1041   sys::swapByteOrder(lc.stroff);
   1042   sys::swapByteOrder(lc.strsize);
   1043 }
   1044 
   1045 inline void swapStruct(segment_command_64 &seg) {
   1046   sys::swapByteOrder(seg.cmd);
   1047   sys::swapByteOrder(seg.cmdsize);
   1048   sys::swapByteOrder(seg.vmaddr);
   1049   sys::swapByteOrder(seg.vmsize);
   1050   sys::swapByteOrder(seg.fileoff);
   1051   sys::swapByteOrder(seg.filesize);
   1052   sys::swapByteOrder(seg.maxprot);
   1053   sys::swapByteOrder(seg.initprot);
   1054   sys::swapByteOrder(seg.nsects);
   1055   sys::swapByteOrder(seg.flags);
   1056 }
   1057 
   1058 inline void swapStruct(segment_command &seg) {
   1059   sys::swapByteOrder(seg.cmd);
   1060   sys::swapByteOrder(seg.cmdsize);
   1061   sys::swapByteOrder(seg.vmaddr);
   1062   sys::swapByteOrder(seg.vmsize);
   1063   sys::swapByteOrder(seg.fileoff);
   1064   sys::swapByteOrder(seg.filesize);
   1065   sys::swapByteOrder(seg.maxprot);
   1066   sys::swapByteOrder(seg.initprot);
   1067   sys::swapByteOrder(seg.nsects);
   1068   sys::swapByteOrder(seg.flags);
   1069 }
   1070 
   1071 inline void swapStruct(section_64 &sect) {
   1072   sys::swapByteOrder(sect.addr);
   1073   sys::swapByteOrder(sect.size);
   1074   sys::swapByteOrder(sect.offset);
   1075   sys::swapByteOrder(sect.align);
   1076   sys::swapByteOrder(sect.reloff);
   1077   sys::swapByteOrder(sect.nreloc);
   1078   sys::swapByteOrder(sect.flags);
   1079   sys::swapByteOrder(sect.reserved1);
   1080   sys::swapByteOrder(sect.reserved2);
   1081 }
   1082 
   1083 inline void swapStruct(section &sect) {
   1084   sys::swapByteOrder(sect.addr);
   1085   sys::swapByteOrder(sect.size);
   1086   sys::swapByteOrder(sect.offset);
   1087   sys::swapByteOrder(sect.align);
   1088   sys::swapByteOrder(sect.reloff);
   1089   sys::swapByteOrder(sect.nreloc);
   1090   sys::swapByteOrder(sect.flags);
   1091   sys::swapByteOrder(sect.reserved1);
   1092   sys::swapByteOrder(sect.reserved2);
   1093 }
   1094 
   1095 inline void swapStruct(dyld_info_command &info) {
   1096   sys::swapByteOrder(info.cmd);
   1097   sys::swapByteOrder(info.cmdsize);
   1098   sys::swapByteOrder(info.rebase_off);
   1099   sys::swapByteOrder(info.rebase_size);
   1100   sys::swapByteOrder(info.bind_off);
   1101   sys::swapByteOrder(info.bind_size);
   1102   sys::swapByteOrder(info.weak_bind_off);
   1103   sys::swapByteOrder(info.weak_bind_size);
   1104   sys::swapByteOrder(info.lazy_bind_off);
   1105   sys::swapByteOrder(info.lazy_bind_size);
   1106   sys::swapByteOrder(info.export_off);
   1107   sys::swapByteOrder(info.export_size);
   1108 }
   1109 
   1110 inline void swapStruct(dylib_command &d) {
   1111   sys::swapByteOrder(d.cmd);
   1112   sys::swapByteOrder(d.cmdsize);
   1113   sys::swapByteOrder(d.dylib.name);
   1114   sys::swapByteOrder(d.dylib.timestamp);
   1115   sys::swapByteOrder(d.dylib.current_version);
   1116   sys::swapByteOrder(d.dylib.compatibility_version);
   1117 }
   1118 
   1119 inline void swapStruct(sub_framework_command &s) {
   1120   sys::swapByteOrder(s.cmd);
   1121   sys::swapByteOrder(s.cmdsize);
   1122   sys::swapByteOrder(s.umbrella);
   1123 }
   1124 
   1125 inline void swapStruct(sub_umbrella_command &s) {
   1126   sys::swapByteOrder(s.cmd);
   1127   sys::swapByteOrder(s.cmdsize);
   1128   sys::swapByteOrder(s.sub_umbrella);
   1129 }
   1130 
   1131 inline void swapStruct(sub_library_command &s) {
   1132   sys::swapByteOrder(s.cmd);
   1133   sys::swapByteOrder(s.cmdsize);
   1134   sys::swapByteOrder(s.sub_library);
   1135 }
   1136 
   1137 inline void swapStruct(sub_client_command &s) {
   1138   sys::swapByteOrder(s.cmd);
   1139   sys::swapByteOrder(s.cmdsize);
   1140   sys::swapByteOrder(s.client);
   1141 }
   1142 
   1143 inline void swapStruct(routines_command &r) {
   1144   sys::swapByteOrder(r.cmd);
   1145   sys::swapByteOrder(r.cmdsize);
   1146   sys::swapByteOrder(r.init_address);
   1147   sys::swapByteOrder(r.init_module);
   1148   sys::swapByteOrder(r.reserved1);
   1149   sys::swapByteOrder(r.reserved2);
   1150   sys::swapByteOrder(r.reserved3);
   1151   sys::swapByteOrder(r.reserved4);
   1152   sys::swapByteOrder(r.reserved5);
   1153   sys::swapByteOrder(r.reserved6);
   1154 }
   1155 
   1156 inline void swapStruct(routines_command_64 &r) {
   1157   sys::swapByteOrder(r.cmd);
   1158   sys::swapByteOrder(r.cmdsize);
   1159   sys::swapByteOrder(r.init_address);
   1160   sys::swapByteOrder(r.init_module);
   1161   sys::swapByteOrder(r.reserved1);
   1162   sys::swapByteOrder(r.reserved2);
   1163   sys::swapByteOrder(r.reserved3);
   1164   sys::swapByteOrder(r.reserved4);
   1165   sys::swapByteOrder(r.reserved5);
   1166   sys::swapByteOrder(r.reserved6);
   1167 }
   1168 
   1169 inline void swapStruct(thread_command &t) {
   1170   sys::swapByteOrder(t.cmd);
   1171   sys::swapByteOrder(t.cmdsize);
   1172 }
   1173 
   1174 inline void swapStruct(dylinker_command &d) {
   1175   sys::swapByteOrder(d.cmd);
   1176   sys::swapByteOrder(d.cmdsize);
   1177   sys::swapByteOrder(d.name);
   1178 }
   1179 
   1180 inline void swapStruct(uuid_command &u) {
   1181   sys::swapByteOrder(u.cmd);
   1182   sys::swapByteOrder(u.cmdsize);
   1183 }
   1184 
   1185 inline void swapStruct(rpath_command &r) {
   1186   sys::swapByteOrder(r.cmd);
   1187   sys::swapByteOrder(r.cmdsize);
   1188   sys::swapByteOrder(r.path);
   1189 }
   1190 
   1191 inline void swapStruct(source_version_command &s) {
   1192   sys::swapByteOrder(s.cmd);
   1193   sys::swapByteOrder(s.cmdsize);
   1194   sys::swapByteOrder(s.version);
   1195 }
   1196 
   1197 inline void swapStruct(entry_point_command &e) {
   1198   sys::swapByteOrder(e.cmd);
   1199   sys::swapByteOrder(e.cmdsize);
   1200   sys::swapByteOrder(e.entryoff);
   1201   sys::swapByteOrder(e.stacksize);
   1202 }
   1203 
   1204 inline void swapStruct(encryption_info_command &e) {
   1205   sys::swapByteOrder(e.cmd);
   1206   sys::swapByteOrder(e.cmdsize);
   1207   sys::swapByteOrder(e.cryptoff);
   1208   sys::swapByteOrder(e.cryptsize);
   1209   sys::swapByteOrder(e.cryptid);
   1210 }
   1211 
   1212 inline void swapStruct(encryption_info_command_64 &e) {
   1213   sys::swapByteOrder(e.cmd);
   1214   sys::swapByteOrder(e.cmdsize);
   1215   sys::swapByteOrder(e.cryptoff);
   1216   sys::swapByteOrder(e.cryptsize);
   1217   sys::swapByteOrder(e.cryptid);
   1218   sys::swapByteOrder(e.pad);
   1219 }
   1220 
   1221 inline void swapStruct(dysymtab_command &dst) {
   1222   sys::swapByteOrder(dst.cmd);
   1223   sys::swapByteOrder(dst.cmdsize);
   1224   sys::swapByteOrder(dst.ilocalsym);
   1225   sys::swapByteOrder(dst.nlocalsym);
   1226   sys::swapByteOrder(dst.iextdefsym);
   1227   sys::swapByteOrder(dst.nextdefsym);
   1228   sys::swapByteOrder(dst.iundefsym);
   1229   sys::swapByteOrder(dst.nundefsym);
   1230   sys::swapByteOrder(dst.tocoff);
   1231   sys::swapByteOrder(dst.ntoc);
   1232   sys::swapByteOrder(dst.modtaboff);
   1233   sys::swapByteOrder(dst.nmodtab);
   1234   sys::swapByteOrder(dst.extrefsymoff);
   1235   sys::swapByteOrder(dst.nextrefsyms);
   1236   sys::swapByteOrder(dst.indirectsymoff);
   1237   sys::swapByteOrder(dst.nindirectsyms);
   1238   sys::swapByteOrder(dst.extreloff);
   1239   sys::swapByteOrder(dst.nextrel);
   1240   sys::swapByteOrder(dst.locreloff);
   1241   sys::swapByteOrder(dst.nlocrel);
   1242 }
   1243 
   1244 inline void swapStruct(any_relocation_info &reloc) {
   1245   sys::swapByteOrder(reloc.r_word0);
   1246   sys::swapByteOrder(reloc.r_word1);
   1247 }
   1248 
   1249 inline void swapStruct(nlist_base &S) {
   1250   sys::swapByteOrder(S.n_strx);
   1251   sys::swapByteOrder(S.n_desc);
   1252 }
   1253 
   1254 inline void swapStruct(nlist &sym) {
   1255   sys::swapByteOrder(sym.n_strx);
   1256   sys::swapByteOrder(sym.n_desc);
   1257   sys::swapByteOrder(sym.n_value);
   1258 }
   1259 
   1260 inline void swapStruct(nlist_64 &sym) {
   1261   sys::swapByteOrder(sym.n_strx);
   1262   sys::swapByteOrder(sym.n_desc);
   1263   sys::swapByteOrder(sym.n_value);
   1264 }
   1265 
   1266 inline void swapStruct(linkedit_data_command &C) {
   1267   sys::swapByteOrder(C.cmd);
   1268   sys::swapByteOrder(C.cmdsize);
   1269   sys::swapByteOrder(C.dataoff);
   1270   sys::swapByteOrder(C.datasize);
   1271 }
   1272 
   1273 inline void swapStruct(linker_option_command &C) {
   1274   sys::swapByteOrder(C.cmd);
   1275   sys::swapByteOrder(C.cmdsize);
   1276   sys::swapByteOrder(C.count);
   1277 }
   1278 
   1279 inline void swapStruct(version_min_command &C) {
   1280   sys::swapByteOrder(C.cmd);
   1281   sys::swapByteOrder(C.cmdsize);
   1282   sys::swapByteOrder(C.version);
   1283   sys::swapByteOrder(C.sdk);
   1284 }
   1285 
   1286 inline void swapStruct(note_command &C) {
   1287   sys::swapByteOrder(C.cmd);
   1288   sys::swapByteOrder(C.cmdsize);
   1289   sys::swapByteOrder(C.offset);
   1290   sys::swapByteOrder(C.size);
   1291 }
   1292 
   1293 inline void swapStruct(build_version_command &C) {
   1294   sys::swapByteOrder(C.cmd);
   1295   sys::swapByteOrder(C.cmdsize);
   1296   sys::swapByteOrder(C.platform);
   1297   sys::swapByteOrder(C.minos);
   1298   sys::swapByteOrder(C.sdk);
   1299   sys::swapByteOrder(C.ntools);
   1300 }
   1301 
   1302 inline void swapStruct(build_tool_version &C) {
   1303   sys::swapByteOrder(C.tool);
   1304   sys::swapByteOrder(C.version);
   1305 }
   1306 
   1307 inline void swapStruct(data_in_code_entry &C) {
   1308   sys::swapByteOrder(C.offset);
   1309   sys::swapByteOrder(C.length);
   1310   sys::swapByteOrder(C.kind);
   1311 }
   1312 
   1313 inline void swapStruct(uint32_t &C) { sys::swapByteOrder(C); }
   1314 
   1315 // The prebind_cksum_command is obsolete and no longer supported.
   1316 inline void swapStruct(prebind_cksum_command &C) {
   1317   sys::swapByteOrder(C.cmd);
   1318   sys::swapByteOrder(C.cmdsize);
   1319   sys::swapByteOrder(C.cksum);
   1320 }
   1321 
   1322 // The twolevel_hints_command is obsolete and no longer supported.
   1323 inline void swapStruct(twolevel_hints_command &C) {
   1324   sys::swapByteOrder(C.cmd);
   1325   sys::swapByteOrder(C.cmdsize);
   1326   sys::swapByteOrder(C.offset);
   1327   sys::swapByteOrder(C.nhints);
   1328 }
   1329 
   1330 // The prebound_dylib_command is obsolete and no longer supported.
   1331 inline void swapStruct(prebound_dylib_command &C) {
   1332   sys::swapByteOrder(C.cmd);
   1333   sys::swapByteOrder(C.cmdsize);
   1334   sys::swapByteOrder(C.name);
   1335   sys::swapByteOrder(C.nmodules);
   1336   sys::swapByteOrder(C.linked_modules);
   1337 }
   1338 
   1339 // The fvmfile_command is obsolete and no longer supported.
   1340 inline void swapStruct(fvmfile_command &C) {
   1341   sys::swapByteOrder(C.cmd);
   1342   sys::swapByteOrder(C.cmdsize);
   1343   sys::swapByteOrder(C.name);
   1344   sys::swapByteOrder(C.header_addr);
   1345 }
   1346 
   1347 // The symseg_command is obsolete and no longer supported.
   1348 inline void swapStruct(symseg_command &C) {
   1349   sys::swapByteOrder(C.cmd);
   1350   sys::swapByteOrder(C.cmdsize);
   1351   sys::swapByteOrder(C.offset);
   1352   sys::swapByteOrder(C.size);
   1353 }
   1354 
   1355 // The ident_command is obsolete and no longer supported.
   1356 inline void swapStruct(ident_command &C) {
   1357   sys::swapByteOrder(C.cmd);
   1358   sys::swapByteOrder(C.cmdsize);
   1359 }
   1360 
   1361 inline void swapStruct(fvmlib &C) {
   1362   sys::swapByteOrder(C.name);
   1363   sys::swapByteOrder(C.minor_version);
   1364   sys::swapByteOrder(C.header_addr);
   1365 }
   1366 
   1367 // The fvmlib_command is obsolete and no longer supported.
   1368 inline void swapStruct(fvmlib_command &C) {
   1369   sys::swapByteOrder(C.cmd);
   1370   sys::swapByteOrder(C.cmdsize);
   1371   swapStruct(C.fvmlib);
   1372 }
   1373 
   1374 // Get/Set functions from <mach-o/nlist.h>
   1375 
   1376 static inline uint16_t GET_LIBRARY_ORDINAL(uint16_t n_desc) {
   1377   return (((n_desc) >> 8u) & 0xffu);
   1378 }
   1379 
   1380 static inline void SET_LIBRARY_ORDINAL(uint16_t &n_desc, uint8_t ordinal) {
   1381   n_desc = (((n_desc)&0x00ff) | (((ordinal)&0xff) << 8));
   1382 }
   1383 
   1384 static inline uint8_t GET_COMM_ALIGN(uint16_t n_desc) {
   1385   return (n_desc >> 8u) & 0x0fu;
   1386 }
   1387 
   1388 static inline void SET_COMM_ALIGN(uint16_t &n_desc, uint8_t align) {
   1389   n_desc = ((n_desc & 0xf0ffu) | ((align & 0x0fu) << 8u));
   1390 }
   1391 
   1392 // Enums from <mach/machine.h>
   1393 enum : uint32_t {
   1394   // Capability bits used in the definition of cpu_type.
   1395   CPU_ARCH_MASK = 0xff000000, // Mask for architecture bits
   1396   CPU_ARCH_ABI64 = 0x01000000 // 64 bit ABI
   1397 };
   1398 
   1399 // Constants for the cputype field.
   1400 enum CPUType {
   1401   CPU_TYPE_ANY = -1,
   1402   CPU_TYPE_X86 = 7,
   1403   CPU_TYPE_I386 = CPU_TYPE_X86,
   1404   CPU_TYPE_X86_64 = CPU_TYPE_X86 | CPU_ARCH_ABI64,
   1405   /* CPU_TYPE_MIPS      = 8, */
   1406   CPU_TYPE_MC98000 = 10, // Old Motorola PowerPC
   1407   CPU_TYPE_ARM = 12,
   1408   CPU_TYPE_ARM64 = CPU_TYPE_ARM | CPU_ARCH_ABI64,
   1409   CPU_TYPE_SPARC = 14,
   1410   CPU_TYPE_POWERPC = 18,
   1411   CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64
   1412 };
   1413 
   1414 enum : uint32_t {
   1415   // Capability bits used in the definition of cpusubtype.
   1416   CPU_SUBTYPE_MASK = 0xff000000,  // Mask for architecture bits
   1417   CPU_SUBTYPE_LIB64 = 0x80000000, // 64 bit libraries
   1418 
   1419   // Special CPU subtype constants.
   1420   CPU_SUBTYPE_MULTIPLE = ~0u
   1421 };
   1422 
   1423 // Constants for the cpusubtype field.
   1424 enum CPUSubTypeX86 {
   1425   CPU_SUBTYPE_I386_ALL = 3,
   1426   CPU_SUBTYPE_386 = 3,
   1427   CPU_SUBTYPE_486 = 4,
   1428   CPU_SUBTYPE_486SX = 0x84,
   1429   CPU_SUBTYPE_586 = 5,
   1430   CPU_SUBTYPE_PENT = CPU_SUBTYPE_586,
   1431   CPU_SUBTYPE_PENTPRO = 0x16,
   1432   CPU_SUBTYPE_PENTII_M3 = 0x36,
   1433   CPU_SUBTYPE_PENTII_M5 = 0x56,
   1434   CPU_SUBTYPE_CELERON = 0x67,
   1435   CPU_SUBTYPE_CELERON_MOBILE = 0x77,
   1436   CPU_SUBTYPE_PENTIUM_3 = 0x08,
   1437   CPU_SUBTYPE_PENTIUM_3_M = 0x18,
   1438   CPU_SUBTYPE_PENTIUM_3_XEON = 0x28,
   1439   CPU_SUBTYPE_PENTIUM_M = 0x09,
   1440   CPU_SUBTYPE_PENTIUM_4 = 0x0a,
   1441   CPU_SUBTYPE_PENTIUM_4_M = 0x1a,
   1442   CPU_SUBTYPE_ITANIUM = 0x0b,
   1443   CPU_SUBTYPE_ITANIUM_2 = 0x1b,
   1444   CPU_SUBTYPE_XEON = 0x0c,
   1445   CPU_SUBTYPE_XEON_MP = 0x1c,
   1446 
   1447   CPU_SUBTYPE_X86_ALL = 3,
   1448   CPU_SUBTYPE_X86_64_ALL = 3,
   1449   CPU_SUBTYPE_X86_ARCH1 = 4,
   1450   CPU_SUBTYPE_X86_64_H = 8
   1451 };
   1452 static inline int CPU_SUBTYPE_INTEL(int Family, int Model) {
   1453   return Family | (Model << 4);
   1454 }
   1455 static inline int CPU_SUBTYPE_INTEL_FAMILY(CPUSubTypeX86 ST) {
   1456   return ((int)ST) & 0x0f;
   1457 }
   1458 static inline int CPU_SUBTYPE_INTEL_MODEL(CPUSubTypeX86 ST) {
   1459   return ((int)ST) >> 4;
   1460 }
   1461 enum { CPU_SUBTYPE_INTEL_FAMILY_MAX = 15, CPU_SUBTYPE_INTEL_MODEL_ALL = 0 };
   1462 
   1463 enum CPUSubTypeARM {
   1464   CPU_SUBTYPE_ARM_ALL = 0,
   1465   CPU_SUBTYPE_ARM_V4T = 5,
   1466   CPU_SUBTYPE_ARM_V6 = 6,
   1467   CPU_SUBTYPE_ARM_V5 = 7,
   1468   CPU_SUBTYPE_ARM_V5TEJ = 7,
   1469   CPU_SUBTYPE_ARM_XSCALE = 8,
   1470   CPU_SUBTYPE_ARM_V7 = 9,
   1471   //  unused  ARM_V7F     = 10,
   1472   CPU_SUBTYPE_ARM_V7S = 11,
   1473   CPU_SUBTYPE_ARM_V7K = 12,
   1474   CPU_SUBTYPE_ARM_V6M = 14,
   1475   CPU_SUBTYPE_ARM_V7M = 15,
   1476   CPU_SUBTYPE_ARM_V7EM = 16
   1477 };
   1478 
   1479 enum CPUSubTypeARM64 { CPU_SUBTYPE_ARM64_ALL = 0 };
   1480 
   1481 enum CPUSubTypeSPARC { CPU_SUBTYPE_SPARC_ALL = 0 };
   1482 
   1483 enum CPUSubTypePowerPC {
   1484   CPU_SUBTYPE_POWERPC_ALL = 0,
   1485   CPU_SUBTYPE_POWERPC_601 = 1,
   1486   CPU_SUBTYPE_POWERPC_602 = 2,
   1487   CPU_SUBTYPE_POWERPC_603 = 3,
   1488   CPU_SUBTYPE_POWERPC_603e = 4,
   1489   CPU_SUBTYPE_POWERPC_603ev = 5,
   1490   CPU_SUBTYPE_POWERPC_604 = 6,
   1491   CPU_SUBTYPE_POWERPC_604e = 7,
   1492   CPU_SUBTYPE_POWERPC_620 = 8,
   1493   CPU_SUBTYPE_POWERPC_750 = 9,
   1494   CPU_SUBTYPE_POWERPC_7400 = 10,
   1495   CPU_SUBTYPE_POWERPC_7450 = 11,
   1496   CPU_SUBTYPE_POWERPC_970 = 100,
   1497 
   1498   CPU_SUBTYPE_MC980000_ALL = CPU_SUBTYPE_POWERPC_ALL,
   1499   CPU_SUBTYPE_MC98601 = CPU_SUBTYPE_POWERPC_601
   1500 };
   1501 
   1502 struct x86_thread_state32_t {
   1503   uint32_t eax;
   1504   uint32_t ebx;
   1505   uint32_t ecx;
   1506   uint32_t edx;
   1507   uint32_t edi;
   1508   uint32_t esi;
   1509   uint32_t ebp;
   1510   uint32_t esp;
   1511   uint32_t ss;
   1512   uint32_t eflags;
   1513   uint32_t eip;
   1514   uint32_t cs;
   1515   uint32_t ds;
   1516   uint32_t es;
   1517   uint32_t fs;
   1518   uint32_t gs;
   1519 };
   1520 
   1521 struct x86_thread_state64_t {
   1522   uint64_t rax;
   1523   uint64_t rbx;
   1524   uint64_t rcx;
   1525   uint64_t rdx;
   1526   uint64_t rdi;
   1527   uint64_t rsi;
   1528   uint64_t rbp;
   1529   uint64_t rsp;
   1530   uint64_t r8;
   1531   uint64_t r9;
   1532   uint64_t r10;
   1533   uint64_t r11;
   1534   uint64_t r12;
   1535   uint64_t r13;
   1536   uint64_t r14;
   1537   uint64_t r15;
   1538   uint64_t rip;
   1539   uint64_t rflags;
   1540   uint64_t cs;
   1541   uint64_t fs;
   1542   uint64_t gs;
   1543 };
   1544 
   1545 enum x86_fp_control_precis {
   1546   x86_FP_PREC_24B = 0,
   1547   x86_FP_PREC_53B = 2,
   1548   x86_FP_PREC_64B = 3
   1549 };
   1550 
   1551 enum x86_fp_control_rc {
   1552   x86_FP_RND_NEAR = 0,
   1553   x86_FP_RND_DOWN = 1,
   1554   x86_FP_RND_UP = 2,
   1555   x86_FP_CHOP = 3
   1556 };
   1557 
   1558 struct fp_control_t {
   1559   unsigned short invalid : 1, denorm : 1, zdiv : 1, ovrfl : 1, undfl : 1,
   1560       precis : 1, : 2, pc : 2, rc : 2, : 1, : 3;
   1561 };
   1562 
   1563 struct fp_status_t {
   1564   unsigned short invalid : 1, denorm : 1, zdiv : 1, ovrfl : 1, undfl : 1,
   1565       precis : 1, stkflt : 1, errsumm : 1, c0 : 1, c1 : 1, c2 : 1, tos : 3,
   1566       c3 : 1, busy : 1;
   1567 };
   1568 
   1569 struct mmst_reg_t {
   1570   char mmst_reg[10];
   1571   char mmst_rsrv[6];
   1572 };
   1573 
   1574 struct xmm_reg_t {
   1575   char xmm_reg[16];
   1576 };
   1577 
   1578 struct x86_float_state64_t {
   1579   int32_t fpu_reserved[2];
   1580   fp_control_t fpu_fcw;
   1581   fp_status_t fpu_fsw;
   1582   uint8_t fpu_ftw;
   1583   uint8_t fpu_rsrv1;
   1584   uint16_t fpu_fop;
   1585   uint32_t fpu_ip;
   1586   uint16_t fpu_cs;
   1587   uint16_t fpu_rsrv2;
   1588   uint32_t fpu_dp;
   1589   uint16_t fpu_ds;
   1590   uint16_t fpu_rsrv3;
   1591   uint32_t fpu_mxcsr;
   1592   uint32_t fpu_mxcsrmask;
   1593   mmst_reg_t fpu_stmm0;
   1594   mmst_reg_t fpu_stmm1;
   1595   mmst_reg_t fpu_stmm2;
   1596   mmst_reg_t fpu_stmm3;
   1597   mmst_reg_t fpu_stmm4;
   1598   mmst_reg_t fpu_stmm5;
   1599   mmst_reg_t fpu_stmm6;
   1600   mmst_reg_t fpu_stmm7;
   1601   xmm_reg_t fpu_xmm0;
   1602   xmm_reg_t fpu_xmm1;
   1603   xmm_reg_t fpu_xmm2;
   1604   xmm_reg_t fpu_xmm3;
   1605   xmm_reg_t fpu_xmm4;
   1606   xmm_reg_t fpu_xmm5;
   1607   xmm_reg_t fpu_xmm6;
   1608   xmm_reg_t fpu_xmm7;
   1609   xmm_reg_t fpu_xmm8;
   1610   xmm_reg_t fpu_xmm9;
   1611   xmm_reg_t fpu_xmm10;
   1612   xmm_reg_t fpu_xmm11;
   1613   xmm_reg_t fpu_xmm12;
   1614   xmm_reg_t fpu_xmm13;
   1615   xmm_reg_t fpu_xmm14;
   1616   xmm_reg_t fpu_xmm15;
   1617   char fpu_rsrv4[6 * 16];
   1618   uint32_t fpu_reserved1;
   1619 };
   1620 
   1621 struct x86_exception_state64_t {
   1622   uint16_t trapno;
   1623   uint16_t cpu;
   1624   uint32_t err;
   1625   uint64_t faultvaddr;
   1626 };
   1627 
   1628 inline void swapStruct(x86_thread_state32_t &x) {
   1629   sys::swapByteOrder(x.eax);
   1630   sys::swapByteOrder(x.ebx);
   1631   sys::swapByteOrder(x.ecx);
   1632   sys::swapByteOrder(x.edx);
   1633   sys::swapByteOrder(x.edi);
   1634   sys::swapByteOrder(x.esi);
   1635   sys::swapByteOrder(x.ebp);
   1636   sys::swapByteOrder(x.esp);
   1637   sys::swapByteOrder(x.ss);
   1638   sys::swapByteOrder(x.eflags);
   1639   sys::swapByteOrder(x.eip);
   1640   sys::swapByteOrder(x.cs);
   1641   sys::swapByteOrder(x.ds);
   1642   sys::swapByteOrder(x.es);
   1643   sys::swapByteOrder(x.fs);
   1644   sys::swapByteOrder(x.gs);
   1645 }
   1646 
   1647 inline void swapStruct(x86_thread_state64_t &x) {
   1648   sys::swapByteOrder(x.rax);
   1649   sys::swapByteOrder(x.rbx);
   1650   sys::swapByteOrder(x.rcx);
   1651   sys::swapByteOrder(x.rdx);
   1652   sys::swapByteOrder(x.rdi);
   1653   sys::swapByteOrder(x.rsi);
   1654   sys::swapByteOrder(x.rbp);
   1655   sys::swapByteOrder(x.rsp);
   1656   sys::swapByteOrder(x.r8);
   1657   sys::swapByteOrder(x.r9);
   1658   sys::swapByteOrder(x.r10);
   1659   sys::swapByteOrder(x.r11);
   1660   sys::swapByteOrder(x.r12);
   1661   sys::swapByteOrder(x.r13);
   1662   sys::swapByteOrder(x.r14);
   1663   sys::swapByteOrder(x.r15);
   1664   sys::swapByteOrder(x.rip);
   1665   sys::swapByteOrder(x.rflags);
   1666   sys::swapByteOrder(x.cs);
   1667   sys::swapByteOrder(x.fs);
   1668   sys::swapByteOrder(x.gs);
   1669 }
   1670 
   1671 inline void swapStruct(x86_float_state64_t &x) {
   1672   sys::swapByteOrder(x.fpu_reserved[0]);
   1673   sys::swapByteOrder(x.fpu_reserved[1]);
   1674   // TODO swap: fp_control_t fpu_fcw;
   1675   // TODO swap: fp_status_t fpu_fsw;
   1676   sys::swapByteOrder(x.fpu_fop);
   1677   sys::swapByteOrder(x.fpu_ip);
   1678   sys::swapByteOrder(x.fpu_cs);
   1679   sys::swapByteOrder(x.fpu_rsrv2);
   1680   sys::swapByteOrder(x.fpu_dp);
   1681   sys::swapByteOrder(x.fpu_ds);
   1682   sys::swapByteOrder(x.fpu_rsrv3);
   1683   sys::swapByteOrder(x.fpu_mxcsr);
   1684   sys::swapByteOrder(x.fpu_mxcsrmask);
   1685   sys::swapByteOrder(x.fpu_reserved1);
   1686 }
   1687 
   1688 inline void swapStruct(x86_exception_state64_t &x) {
   1689   sys::swapByteOrder(x.trapno);
   1690   sys::swapByteOrder(x.cpu);
   1691   sys::swapByteOrder(x.err);
   1692   sys::swapByteOrder(x.faultvaddr);
   1693 }
   1694 
   1695 struct x86_state_hdr_t {
   1696   uint32_t flavor;
   1697   uint32_t count;
   1698 };
   1699 
   1700 struct x86_thread_state_t {
   1701   x86_state_hdr_t tsh;
   1702   union {
   1703     x86_thread_state64_t ts64;
   1704     x86_thread_state32_t ts32;
   1705   } uts;
   1706 };
   1707 
   1708 struct x86_float_state_t {
   1709   x86_state_hdr_t fsh;
   1710   union {
   1711     x86_float_state64_t fs64;
   1712   } ufs;
   1713 };
   1714 
   1715 struct x86_exception_state_t {
   1716   x86_state_hdr_t esh;
   1717   union {
   1718     x86_exception_state64_t es64;
   1719   } ues;
   1720 };
   1721 
   1722 inline void swapStruct(x86_state_hdr_t &x) {
   1723   sys::swapByteOrder(x.flavor);
   1724   sys::swapByteOrder(x.count);
   1725 }
   1726 
   1727 enum X86ThreadFlavors {
   1728   x86_THREAD_STATE32 = 1,
   1729   x86_FLOAT_STATE32 = 2,
   1730   x86_EXCEPTION_STATE32 = 3,
   1731   x86_THREAD_STATE64 = 4,
   1732   x86_FLOAT_STATE64 = 5,
   1733   x86_EXCEPTION_STATE64 = 6,
   1734   x86_THREAD_STATE = 7,
   1735   x86_FLOAT_STATE = 8,
   1736   x86_EXCEPTION_STATE = 9,
   1737   x86_DEBUG_STATE32 = 10,
   1738   x86_DEBUG_STATE64 = 11,
   1739   x86_DEBUG_STATE = 12
   1740 };
   1741 
   1742 inline void swapStruct(x86_thread_state_t &x) {
   1743   swapStruct(x.tsh);
   1744   if (x.tsh.flavor == x86_THREAD_STATE64)
   1745     swapStruct(x.uts.ts64);
   1746 }
   1747 
   1748 inline void swapStruct(x86_float_state_t &x) {
   1749   swapStruct(x.fsh);
   1750   if (x.fsh.flavor == x86_FLOAT_STATE64)
   1751     swapStruct(x.ufs.fs64);
   1752 }
   1753 
   1754 inline void swapStruct(x86_exception_state_t &x) {
   1755   swapStruct(x.esh);
   1756   if (x.esh.flavor == x86_EXCEPTION_STATE64)
   1757     swapStruct(x.ues.es64);
   1758 }
   1759 
   1760 const uint32_t x86_THREAD_STATE32_COUNT =
   1761     sizeof(x86_thread_state32_t) / sizeof(uint32_t);
   1762 
   1763 const uint32_t x86_THREAD_STATE64_COUNT =
   1764     sizeof(x86_thread_state64_t) / sizeof(uint32_t);
   1765 const uint32_t x86_FLOAT_STATE64_COUNT =
   1766     sizeof(x86_float_state64_t) / sizeof(uint32_t);
   1767 const uint32_t x86_EXCEPTION_STATE64_COUNT =
   1768     sizeof(x86_exception_state64_t) / sizeof(uint32_t);
   1769 
   1770 const uint32_t x86_THREAD_STATE_COUNT =
   1771     sizeof(x86_thread_state_t) / sizeof(uint32_t);
   1772 const uint32_t x86_FLOAT_STATE_COUNT =
   1773     sizeof(x86_float_state_t) / sizeof(uint32_t);
   1774 const uint32_t x86_EXCEPTION_STATE_COUNT =
   1775     sizeof(x86_exception_state_t) / sizeof(uint32_t);
   1776 
   1777 struct arm_thread_state32_t {
   1778   uint32_t r[13];
   1779   uint32_t sp;
   1780   uint32_t lr;
   1781   uint32_t pc;
   1782   uint32_t cpsr;
   1783 };
   1784 
   1785 inline void swapStruct(arm_thread_state32_t &x) {
   1786   for (int i = 0; i < 13; i++)
   1787     sys::swapByteOrder(x.r[i]);
   1788   sys::swapByteOrder(x.sp);
   1789   sys::swapByteOrder(x.lr);
   1790   sys::swapByteOrder(x.pc);
   1791   sys::swapByteOrder(x.cpsr);
   1792 }
   1793 
   1794 struct arm_thread_state64_t {
   1795   uint64_t x[29];
   1796   uint64_t fp;
   1797   uint64_t lr;
   1798   uint64_t sp;
   1799   uint64_t pc;
   1800   uint32_t cpsr;
   1801   uint32_t pad;
   1802 };
   1803 
   1804 inline void swapStruct(arm_thread_state64_t &x) {
   1805   for (int i = 0; i < 29; i++)
   1806     sys::swapByteOrder(x.x[i]);
   1807   sys::swapByteOrder(x.fp);
   1808   sys::swapByteOrder(x.lr);
   1809   sys::swapByteOrder(x.sp);
   1810   sys::swapByteOrder(x.pc);
   1811   sys::swapByteOrder(x.cpsr);
   1812 }
   1813 
   1814 struct arm_state_hdr_t {
   1815   uint32_t flavor;
   1816   uint32_t count;
   1817 };
   1818 
   1819 struct arm_thread_state_t {
   1820   arm_state_hdr_t tsh;
   1821   union {
   1822     arm_thread_state32_t ts32;
   1823   } uts;
   1824 };
   1825 
   1826 inline void swapStruct(arm_state_hdr_t &x) {
   1827   sys::swapByteOrder(x.flavor);
   1828   sys::swapByteOrder(x.count);
   1829 }
   1830 
   1831 enum ARMThreadFlavors {
   1832   ARM_THREAD_STATE = 1,
   1833   ARM_VFP_STATE = 2,
   1834   ARM_EXCEPTION_STATE = 3,
   1835   ARM_DEBUG_STATE = 4,
   1836   ARN_THREAD_STATE_NONE = 5,
   1837   ARM_THREAD_STATE64 = 6,
   1838   ARM_EXCEPTION_STATE64 = 7
   1839 };
   1840 
   1841 inline void swapStruct(arm_thread_state_t &x) {
   1842   swapStruct(x.tsh);
   1843   if (x.tsh.flavor == ARM_THREAD_STATE)
   1844     swapStruct(x.uts.ts32);
   1845 }
   1846 
   1847 const uint32_t ARM_THREAD_STATE_COUNT =
   1848     sizeof(arm_thread_state32_t) / sizeof(uint32_t);
   1849 
   1850 const uint32_t ARM_THREAD_STATE64_COUNT =
   1851     sizeof(arm_thread_state64_t) / sizeof(uint32_t);
   1852 
   1853 struct ppc_thread_state32_t {
   1854   uint32_t srr0;
   1855   uint32_t srr1;
   1856   uint32_t r0;
   1857   uint32_t r1;
   1858   uint32_t r2;
   1859   uint32_t r3;
   1860   uint32_t r4;
   1861   uint32_t r5;
   1862   uint32_t r6;
   1863   uint32_t r7;
   1864   uint32_t r8;
   1865   uint32_t r9;
   1866   uint32_t r10;
   1867   uint32_t r11;
   1868   uint32_t r12;
   1869   uint32_t r13;
   1870   uint32_t r14;
   1871   uint32_t r15;
   1872   uint32_t r16;
   1873   uint32_t r17;
   1874   uint32_t r18;
   1875   uint32_t r19;
   1876   uint32_t r20;
   1877   uint32_t r21;
   1878   uint32_t r22;
   1879   uint32_t r23;
   1880   uint32_t r24;
   1881   uint32_t r25;
   1882   uint32_t r26;
   1883   uint32_t r27;
   1884   uint32_t r28;
   1885   uint32_t r29;
   1886   uint32_t r30;
   1887   uint32_t r31;
   1888   uint32_t ct;
   1889   uint32_t xer;
   1890   uint32_t lr;
   1891   uint32_t ctr;
   1892   uint32_t mq;
   1893   uint32_t vrsave;
   1894 };
   1895 
   1896 inline void swapStruct(ppc_thread_state32_t &x) {
   1897   sys::swapByteOrder(x.srr0);
   1898   sys::swapByteOrder(x.srr1);
   1899   sys::swapByteOrder(x.r0);
   1900   sys::swapByteOrder(x.r1);
   1901   sys::swapByteOrder(x.r2);
   1902   sys::swapByteOrder(x.r3);
   1903   sys::swapByteOrder(x.r4);
   1904   sys::swapByteOrder(x.r5);
   1905   sys::swapByteOrder(x.r6);
   1906   sys::swapByteOrder(x.r7);
   1907   sys::swapByteOrder(x.r8);
   1908   sys::swapByteOrder(x.r9);
   1909   sys::swapByteOrder(x.r10);
   1910   sys::swapByteOrder(x.r11);
   1911   sys::swapByteOrder(x.r12);
   1912   sys::swapByteOrder(x.r13);
   1913   sys::swapByteOrder(x.r14);
   1914   sys::swapByteOrder(x.r15);
   1915   sys::swapByteOrder(x.r16);
   1916   sys::swapByteOrder(x.r17);
   1917   sys::swapByteOrder(x.r18);
   1918   sys::swapByteOrder(x.r19);
   1919   sys::swapByteOrder(x.r20);
   1920   sys::swapByteOrder(x.r21);
   1921   sys::swapByteOrder(x.r22);
   1922   sys::swapByteOrder(x.r23);
   1923   sys::swapByteOrder(x.r24);
   1924   sys::swapByteOrder(x.r25);
   1925   sys::swapByteOrder(x.r26);
   1926   sys::swapByteOrder(x.r27);
   1927   sys::swapByteOrder(x.r28);
   1928   sys::swapByteOrder(x.r29);
   1929   sys::swapByteOrder(x.r30);
   1930   sys::swapByteOrder(x.r31);
   1931   sys::swapByteOrder(x.ct);
   1932   sys::swapByteOrder(x.xer);
   1933   sys::swapByteOrder(x.lr);
   1934   sys::swapByteOrder(x.ctr);
   1935   sys::swapByteOrder(x.mq);
   1936   sys::swapByteOrder(x.vrsave);
   1937 }
   1938 
   1939 struct ppc_state_hdr_t {
   1940   uint32_t flavor;
   1941   uint32_t count;
   1942 };
   1943 
   1944 struct ppc_thread_state_t {
   1945   ppc_state_hdr_t tsh;
   1946   union {
   1947     ppc_thread_state32_t ts32;
   1948   } uts;
   1949 };
   1950 
   1951 inline void swapStruct(ppc_state_hdr_t &x) {
   1952   sys::swapByteOrder(x.flavor);
   1953   sys::swapByteOrder(x.count);
   1954 }
   1955 
   1956 enum PPCThreadFlavors {
   1957   PPC_THREAD_STATE = 1,
   1958   PPC_FLOAT_STATE = 2,
   1959   PPC_EXCEPTION_STATE = 3,
   1960   PPC_VECTOR_STATE = 4,
   1961   PPC_THREAD_STATE64 = 5,
   1962   PPC_EXCEPTION_STATE64 = 6,
   1963   PPC_THREAD_STATE_NONE = 7
   1964 };
   1965 
   1966 inline void swapStruct(ppc_thread_state_t &x) {
   1967   swapStruct(x.tsh);
   1968   if (x.tsh.flavor == PPC_THREAD_STATE)
   1969     swapStruct(x.uts.ts32);
   1970 }
   1971 
   1972 const uint32_t PPC_THREAD_STATE_COUNT =
   1973     sizeof(ppc_thread_state32_t) / sizeof(uint32_t);
   1974 
   1975 // Define a union of all load command structs
   1976 #define LOAD_COMMAND_STRUCT(LCStruct) LCStruct LCStruct##_data;
   1977 
   1978 union macho_load_command {
   1979 #include "llvm/BinaryFormat/MachO.def"
   1980 };
   1981 
   1982 } // end namespace MachO
   1983 } // end namespace llvm
   1984 
   1985 #endif
   1986