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