include/llvm/BinaryFormat/MachO.h

   1 //===-- llvm/BinaryFormat/MachO.h - The MachO file format -------*- C++/-*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file defines manifest constants for the MachO object file format.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_BINARYFORMAT_MACHO_H
  14 #define LLVM_BINARYFORMAT_MACHO_H
  15
  16 #include "llvm/Support/Compiler.h"
  17 #include "llvm/Support/DataTypes.h"
  18 #include "llvm/Support/Host.h"
  19
  20 namespace llvm {
  21 namespace MachO {
  22 // Enums from <mach-o/loader.h>
  23 enum : uint32_t {
  24   // Constants for the "magic" field in llvm::MachO::mach_header and
  25   // llvm::MachO::mach_header_64
  26   MH_MAGIC = 0xFEEDFACEu,
  27   MH_CIGAM = 0xCEFAEDFEu,
  28   MH_MAGIC_64 = 0xFEEDFACFu,
  29   MH_CIGAM_64 = 0xCFFAEDFEu,
  30   FAT_MAGIC = 0xCAFEBABEu,
  31   FAT_CIGAM = 0xBEBAFECAu,
  32   FAT_MAGIC_64 = 0xCAFEBABFu,
  33   FAT_CIGAM_64 = 0xBFBAFECAu
  34 };
  35
  36 enum HeaderFileType {
  37   // Constants for the "filetype" field in llvm::MachO::mach_header and
  38   // llvm::MachO::mach_header_64
  39   MH_OBJECT = 0x1u,
  40   MH_EXECUTE = 0x2u,
  41   MH_FVMLIB = 0x3u,
  42   MH_CORE = 0x4u,
  43   MH_PRELOAD = 0x5u,
  44   MH_DYLIB = 0x6u,
  45   MH_DYLINKER = 0x7u,
  46   MH_BUNDLE = 0x8u,
  47   MH_DYLIB_STUB = 0x9u,
  48   MH_DSYM = 0xAu,
  49   MH_KEXT_BUNDLE = 0xBu
  50 };
  51
  52 enum {
  53   // Constant bits for the "flags" field in llvm::MachO::mach_header and
  54   // llvm::MachO::mach_header_64
  55   MH_NOUNDEFS = 0x00000001u,
  56   MH_INCRLINK = 0x00000002u,
  57   MH_DYLDLINK = 0x00000004u,
  58   MH_BINDATLOAD = 0x00000008u,
  59   MH_PREBOUND = 0x00000010u,
  60   MH_SPLIT_SEGS = 0x00000020u,
  61   MH_LAZY_INIT = 0x00000040u,
  62   MH_TWOLEVEL = 0x00000080u,
  63   MH_FORCE_FLAT = 0x00000100u,
  64   MH_NOMULTIDEFS = 0x00000200u,
  65   MH_NOFIXPREBINDING = 0x00000400u,
  66   MH_PREBINDABLE = 0x00000800u,
  67   MH_ALLMODSBOUND = 0x00001000u,
  68   MH_SUBSECTIONS_VIA_SYMBOLS = 0x00002000u,
  69   MH_CANONICAL = 0x00004000u,
  70   MH_WEAK_DEFINES = 0x00008000u,
  71   MH_BINDS_TO_WEAK = 0x00010000u,
  72   MH_ALLOW_STACK_EXECUTION = 0x00020000u,
  73   MH_ROOT_SAFE = 0x00040000u,
  74   MH_SETUID_SAFE = 0x00080000u,
  75   MH_NO_REEXPORTED_DYLIBS = 0x00100000u,
  76   MH_PIE = 0x00200000u,
  77   MH_DEAD_STRIPPABLE_DYLIB = 0x00400000u,
  78   MH_HAS_TLV_DESCRIPTORS = 0x00800000u,
  79   MH_NO_HEAP_EXECUTION = 0x01000000u,
  80   MH_APP_EXTENSION_SAFE = 0x02000000u,
  81   MH_NLIST_OUTOFSYNC_WITH_DYLDINFO = 0x04000000u
  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   N_COLD_FUNC = 0x0400u,
 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 PlatformType {
 485   PLATFORM_MACOS = 1,
 486   PLATFORM_IOS = 2,
 487   PLATFORM_TVOS = 3,
 488   PLATFORM_WATCHOS = 4,
 489   PLATFORM_BRIDGEOS = 5,
 490   PLATFORM_MACCATALYST = 6,
 491   PLATFORM_IOSSIMULATOR = 7,
 492   PLATFORM_TVOSSIMULATOR = 8,
 493   PLATFORM_WATCHOSSIMULATOR = 9
 494 };
 495
 496 // Values for tools enum in build_tool_version.
 497 enum { TOOL_CLANG = 1, TOOL_SWIFT = 2, TOOL_LD = 3 };
 498
 499 // Structs from <mach-o/loader.h>
 500
 501 struct mach_header {
 502   uint32_t magic;
 503   uint32_t cputype;
 504   uint32_t cpusubtype;
 505   uint32_t filetype;
 506   uint32_t ncmds;
 507   uint32_t sizeofcmds;
 508   uint32_t flags;
 509 };
 510
 511 struct mach_header_64 {
 512   uint32_t magic;
 513   uint32_t cputype;
 514   uint32_t cpusubtype;
 515   uint32_t filetype;
 516   uint32_t ncmds;
 517   uint32_t sizeofcmds;
 518   uint32_t flags;
 519   uint32_t reserved;
 520 };
 521
 522 struct load_command {
 523   uint32_t cmd;
 524   uint32_t cmdsize;
 525 };
 526
 527 struct segment_command {
 528   uint32_t cmd;
 529   uint32_t cmdsize;
 530   char segname[16];
 531   uint32_t vmaddr;
 532   uint32_t vmsize;
 533   uint32_t fileoff;
 534   uint32_t filesize;
 535   uint32_t maxprot;
 536   uint32_t initprot;
 537   uint32_t nsects;
 538   uint32_t flags;
 539 };
 540
 541 struct segment_command_64 {
 542   uint32_t cmd;
 543   uint32_t cmdsize;
 544   char segname[16];
 545   uint64_t vmaddr;
 546   uint64_t vmsize;
 547   uint64_t fileoff;
 548   uint64_t filesize;
 549   uint32_t maxprot;
 550   uint32_t initprot;
 551   uint32_t nsects;
 552   uint32_t flags;
 553 };
 554
 555 struct section {
 556   char sectname[16];
 557   char segname[16];
 558   uint32_t addr;
 559   uint32_t size;
 560   uint32_t offset;
 561   uint32_t align;
 562   uint32_t reloff;
 563   uint32_t nreloc;
 564   uint32_t flags;
 565   uint32_t reserved1;
 566   uint32_t reserved2;
 567 };
 568
 569 struct section_64 {
 570   char sectname[16];
 571   char segname[16];
 572   uint64_t addr;
 573   uint64_t size;
 574   uint32_t offset;
 575   uint32_t align;
 576   uint32_t reloff;
 577   uint32_t nreloc;
 578   uint32_t flags;
 579   uint32_t reserved1;
 580   uint32_t reserved2;
 581   uint32_t reserved3;
 582 };
 583
 584 inline bool isVirtualSection(uint8_t type) {
 585   return (type == MachO::S_ZEROFILL || type == MachO::S_GB_ZEROFILL ||
 586           type == MachO::S_THREAD_LOCAL_ZEROFILL);
 587 }
 588
 589 struct fvmlib {
 590   uint32_t name;
 591   uint32_t minor_version;
 592   uint32_t header_addr;
 593 };
 594
 595 // The fvmlib_command is obsolete and no longer supported.
 596 struct fvmlib_command {
 597   uint32_t cmd;
 598   uint32_t cmdsize;
 599   struct fvmlib fvmlib;
 600 };
 601
 602 struct dylib {
 603   uint32_t name;
 604   uint32_t timestamp;
 605   uint32_t current_version;
 606   uint32_t compatibility_version;
 607 };
 608
 609 struct dylib_command {
 610   uint32_t cmd;
 611   uint32_t cmdsize;
 612   struct dylib dylib;
 613 };
 614
 615 struct sub_framework_command {
 616   uint32_t cmd;
 617   uint32_t cmdsize;
 618   uint32_t umbrella;
 619 };
 620
 621 struct sub_client_command {
 622   uint32_t cmd;
 623   uint32_t cmdsize;
 624   uint32_t client;
 625 };
 626
 627 struct sub_umbrella_command {
 628   uint32_t cmd;
 629   uint32_t cmdsize;
 630   uint32_t sub_umbrella;
 631 };
 632
 633 struct sub_library_command {
 634   uint32_t cmd;
 635   uint32_t cmdsize;
 636   uint32_t sub_library;
 637 };
 638
 639 // The prebound_dylib_command is obsolete and no longer supported.
 640 struct prebound_dylib_command {
 641   uint32_t cmd;
 642   uint32_t cmdsize;
 643   uint32_t name;
 644   uint32_t nmodules;
 645   uint32_t linked_modules;
 646 };
 647
 648 struct dylinker_command {
 649   uint32_t cmd;
 650   uint32_t cmdsize;
 651   uint32_t name;
 652 };
 653
 654 struct thread_command {
 655   uint32_t cmd;
 656   uint32_t cmdsize;
 657 };
 658
 659 struct routines_command {
 660   uint32_t cmd;
 661   uint32_t cmdsize;
 662   uint32_t init_address;
 663   uint32_t init_module;
 664   uint32_t reserved1;
 665   uint32_t reserved2;
 666   uint32_t reserved3;
 667   uint32_t reserved4;
 668   uint32_t reserved5;
 669   uint32_t reserved6;
 670 };
 671
 672 struct routines_command_64 {
 673   uint32_t cmd;
 674   uint32_t cmdsize;
 675   uint64_t init_address;
 676   uint64_t init_module;
 677   uint64_t reserved1;
 678   uint64_t reserved2;
 679   uint64_t reserved3;
 680   uint64_t reserved4;
 681   uint64_t reserved5;
 682   uint64_t reserved6;
 683 };
 684
 685 struct symtab_command {
 686   uint32_t cmd;
 687   uint32_t cmdsize;
 688   uint32_t symoff;
 689   uint32_t nsyms;
 690   uint32_t stroff;
 691   uint32_t strsize;
 692 };
 693
 694 struct dysymtab_command {
 695   uint32_t cmd;
 696   uint32_t cmdsize;
 697   uint32_t ilocalsym;
 698   uint32_t nlocalsym;
 699   uint32_t iextdefsym;
 700   uint32_t nextdefsym;
 701   uint32_t iundefsym;
 702   uint32_t nundefsym;
 703   uint32_t tocoff;
 704   uint32_t ntoc;
 705   uint32_t modtaboff;
 706   uint32_t nmodtab;
 707   uint32_t extrefsymoff;
 708   uint32_t nextrefsyms;
 709   uint32_t indirectsymoff;
 710   uint32_t nindirectsyms;
 711   uint32_t extreloff;
 712   uint32_t nextrel;
 713   uint32_t locreloff;
 714   uint32_t nlocrel;
 715 };
 716
 717 struct dylib_table_of_contents {
 718   uint32_t symbol_index;
 719   uint32_t module_index;
 720 };
 721
 722 struct dylib_module {
 723   uint32_t module_name;
 724   uint32_t iextdefsym;
 725   uint32_t nextdefsym;
 726   uint32_t irefsym;
 727   uint32_t nrefsym;
 728   uint32_t ilocalsym;
 729   uint32_t nlocalsym;
 730   uint32_t iextrel;
 731   uint32_t nextrel;
 732   uint32_t iinit_iterm;
 733   uint32_t ninit_nterm;
 734   uint32_t objc_module_info_addr;
 735   uint32_t objc_module_info_size;
 736 };
 737
 738 struct dylib_module_64 {
 739   uint32_t module_name;
 740   uint32_t iextdefsym;
 741   uint32_t nextdefsym;
 742   uint32_t irefsym;
 743   uint32_t nrefsym;
 744   uint32_t ilocalsym;
 745   uint32_t nlocalsym;
 746   uint32_t iextrel;
 747   uint32_t nextrel;
 748   uint32_t iinit_iterm;
 749   uint32_t ninit_nterm;
 750   uint32_t objc_module_info_size;
 751   uint64_t objc_module_info_addr;
 752 };
 753
 754 struct dylib_reference {
 755   uint32_t isym : 24, flags : 8;
 756 };
 757
 758 // The twolevel_hints_command is obsolete and no longer supported.
 759 struct twolevel_hints_command {
 760   uint32_t cmd;
 761   uint32_t cmdsize;
 762   uint32_t offset;
 763   uint32_t nhints;
 764 };
 765
 766 // The twolevel_hints_command is obsolete and no longer supported.
 767 struct twolevel_hint {
 768   uint32_t isub_image : 8, itoc : 24;
 769 };
 770
 771 // The prebind_cksum_command is obsolete and no longer supported.
 772 struct prebind_cksum_command {
 773   uint32_t cmd;
 774   uint32_t cmdsize;
 775   uint32_t cksum;
 776 };
 777
 778 struct uuid_command {
 779   uint32_t cmd;
 780   uint32_t cmdsize;
 781   uint8_t uuid[16];
 782 };
 783
 784 struct rpath_command {
 785   uint32_t cmd;
 786   uint32_t cmdsize;
 787   uint32_t path;
 788 };
 789
 790 struct linkedit_data_command {
 791   uint32_t cmd;
 792   uint32_t cmdsize;
 793   uint32_t dataoff;
 794   uint32_t datasize;
 795 };
 796
 797 struct data_in_code_entry {
 798   uint32_t offset;
 799   uint16_t length;
 800   uint16_t kind;
 801 };
 802
 803 struct source_version_command {
 804   uint32_t cmd;
 805   uint32_t cmdsize;
 806   uint64_t version;
 807 };
 808
 809 struct encryption_info_command {
 810   uint32_t cmd;
 811   uint32_t cmdsize;
 812   uint32_t cryptoff;
 813   uint32_t cryptsize;
 814   uint32_t cryptid;
 815 };
 816
 817 struct encryption_info_command_64 {
 818   uint32_t cmd;
 819   uint32_t cmdsize;
 820   uint32_t cryptoff;
 821   uint32_t cryptsize;
 822   uint32_t cryptid;
 823   uint32_t pad;
 824 };
 825
 826 struct version_min_command {
 827   uint32_t cmd;     // LC_VERSION_MIN_MACOSX or
 828                     // LC_VERSION_MIN_IPHONEOS
 829   uint32_t cmdsize; // sizeof(struct version_min_command)
 830   uint32_t version; // X.Y.Z is encoded in nibbles xxxx.yy.zz
 831   uint32_t sdk;     // X.Y.Z is encoded in nibbles xxxx.yy.zz
 832 };
 833
 834 struct note_command {
 835   uint32_t cmd;        // LC_NOTE
 836   uint32_t cmdsize;    // sizeof(struct note_command)
 837   char data_owner[16]; // owner name for this LC_NOTE
 838   uint64_t offset;     // file offset of this data
 839   uint64_t size;       // length of data region
 840 };
 841
 842 struct build_tool_version {
 843   uint32_t tool;    // enum for the tool
 844   uint32_t version; // version of the tool
 845 };
 846
 847 struct build_version_command {
 848   uint32_t cmd;      // LC_BUILD_VERSION
 849   uint32_t cmdsize;  // sizeof(struct build_version_command) +
 850                      // ntools * sizeof(struct build_tool_version)
 851   uint32_t platform; // platform
 852   uint32_t minos;    // X.Y.Z is encoded in nibbles xxxx.yy.zz
 853   uint32_t sdk;      // X.Y.Z is encoded in nibbles xxxx.yy.zz
 854   uint32_t ntools;   // number of tool entries following this
 855 };
 856
 857 struct dyld_info_command {
 858   uint32_t cmd;
 859   uint32_t cmdsize;
 860   uint32_t rebase_off;
 861   uint32_t rebase_size;
 862   uint32_t bind_off;
 863   uint32_t bind_size;
 864   uint32_t weak_bind_off;
 865   uint32_t weak_bind_size;
 866   uint32_t lazy_bind_off;
 867   uint32_t lazy_bind_size;
 868   uint32_t export_off;
 869   uint32_t export_size;
 870 };
 871
 872 struct linker_option_command {
 873   uint32_t cmd;
 874   uint32_t cmdsize;
 875   uint32_t count;
 876 };
 877
 878 // The symseg_command is obsolete and no longer supported.
 879 struct symseg_command {
 880   uint32_t cmd;
 881   uint32_t cmdsize;
 882   uint32_t offset;
 883   uint32_t size;
 884 };
 885
 886 // The ident_command is obsolete and no longer supported.
 887 struct ident_command {
 888   uint32_t cmd;
 889   uint32_t cmdsize;
 890 };
 891
 892 // The fvmfile_command is obsolete and no longer supported.
 893 struct fvmfile_command {
 894   uint32_t cmd;
 895   uint32_t cmdsize;
 896   uint32_t name;
 897   uint32_t header_addr;
 898 };
 899
 900 struct tlv_descriptor_32 {
 901   uint32_t thunk;
 902   uint32_t key;
 903   uint32_t offset;
 904 };
 905
 906 struct tlv_descriptor_64 {
 907   uint64_t thunk;
 908   uint64_t key;
 909   uint64_t offset;
 910 };
 911
 912 struct tlv_descriptor {
 913   uintptr_t thunk;
 914   uintptr_t key;
 915   uintptr_t offset;
 916 };
 917
 918 struct entry_point_command {
 919   uint32_t cmd;
 920   uint32_t cmdsize;
 921   uint64_t entryoff;
 922   uint64_t stacksize;
 923 };
 924
 925 // Structs from <mach-o/fat.h>
 926 struct fat_header {
 927   uint32_t magic;
 928   uint32_t nfat_arch;
 929 };
 930
 931 struct fat_arch {
 932   uint32_t cputype;
 933   uint32_t cpusubtype;
 934   uint32_t offset;
 935   uint32_t size;
 936   uint32_t align;
 937 };
 938
 939 struct fat_arch_64 {
 940   uint32_t cputype;
 941   uint32_t cpusubtype;
 942   uint64_t offset;
 943   uint64_t size;
 944   uint32_t align;
 945   uint32_t reserved;
 946 };
 947
 948 // Structs from <mach-o/reloc.h>
 949 struct relocation_info {
 950   int32_t r_address;
 951 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && (BYTE_ORDER == BIG_ENDIAN)
 952   uint32_t r_type : 4,  r_extern : 1, r_length : 2, r_pcrel : 1,
 953       r_symbolnum : 24;
 954 #else
 955   uint32_t r_symbolnum : 24, r_pcrel : 1, r_length : 2, r_extern : 1,
 956       r_type : 4;
 957 #endif
 958 };
 959
 960 struct scattered_relocation_info {
 961 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && (BYTE_ORDER == BIG_ENDIAN)
 962   uint32_t r_scattered : 1, r_pcrel : 1, r_length : 2, r_type : 4,
 963       r_address : 24;
 964 #else
 965   uint32_t r_address : 24, r_type : 4, r_length : 2, r_pcrel : 1,
 966       r_scattered : 1;
 967 #endif
 968   int32_t r_value;
 969 };
 970
 971 // Structs NOT from <mach-o/reloc.h>, but that make LLVM's life easier
 972 struct any_relocation_info {
 973   uint32_t r_word0, r_word1;
 974 };
 975
 976 // Structs from <mach-o/nlist.h>
 977 struct nlist_base {
 978   uint32_t n_strx;
 979   uint8_t n_type;
 980   uint8_t n_sect;
 981   uint16_t n_desc;
 982 };
 983
 984 struct nlist {
 985   uint32_t n_strx;
 986   uint8_t n_type;
 987   uint8_t n_sect;
 988   int16_t n_desc;
 989   uint32_t n_value;
 990 };
 991
 992 struct nlist_64 {
 993   uint32_t n_strx;
 994   uint8_t n_type;
 995   uint8_t n_sect;
 996   uint16_t n_desc;
 997   uint64_t n_value;
 998 };
 999
1000 // Byte order swapping functions for MachO structs
1001
1002 inline void swapStruct(fat_header &mh) {
1003   sys::swapByteOrder(mh.magic);
1004   sys::swapByteOrder(mh.nfat_arch);
1005 }
1006
1007 inline void swapStruct(fat_arch &mh) {
1008   sys::swapByteOrder(mh.cputype);
1009   sys::swapByteOrder(mh.cpusubtype);
1010   sys::swapByteOrder(mh.offset);
1011   sys::swapByteOrder(mh.size);
1012   sys::swapByteOrder(mh.align);
1013 }
1014
1015 inline void swapStruct(fat_arch_64 &mh) {
1016   sys::swapByteOrder(mh.cputype);
1017   sys::swapByteOrder(mh.cpusubtype);
1018   sys::swapByteOrder(mh.offset);
1019   sys::swapByteOrder(mh.size);
1020   sys::swapByteOrder(mh.align);
1021   sys::swapByteOrder(mh.reserved);
1022 }
1023
1024 inline void swapStruct(mach_header &mh) {
1025   sys::swapByteOrder(mh.magic);
1026   sys::swapByteOrder(mh.cputype);
1027   sys::swapByteOrder(mh.cpusubtype);
1028   sys::swapByteOrder(mh.filetype);
1029   sys::swapByteOrder(mh.ncmds);
1030   sys::swapByteOrder(mh.sizeofcmds);
1031   sys::swapByteOrder(mh.flags);
1032 }
1033
1034 inline void swapStruct(mach_header_64 &H) {
1035   sys::swapByteOrder(H.magic);
1036   sys::swapByteOrder(H.cputype);
1037   sys::swapByteOrder(H.cpusubtype);
1038   sys::swapByteOrder(H.filetype);
1039   sys::swapByteOrder(H.ncmds);
1040   sys::swapByteOrder(H.sizeofcmds);
1041   sys::swapByteOrder(H.flags);
1042   sys::swapByteOrder(H.reserved);
1043 }
1044
1045 inline void swapStruct(load_command &lc) {
1046   sys::swapByteOrder(lc.cmd);
1047   sys::swapByteOrder(lc.cmdsize);
1048 }
1049
1050 inline void swapStruct(symtab_command &lc) {
1051   sys::swapByteOrder(lc.cmd);
1052   sys::swapByteOrder(lc.cmdsize);
1053   sys::swapByteOrder(lc.symoff);
1054   sys::swapByteOrder(lc.nsyms);
1055   sys::swapByteOrder(lc.stroff);
1056   sys::swapByteOrder(lc.strsize);
1057 }
1058
1059 inline void swapStruct(segment_command_64 &seg) {
1060   sys::swapByteOrder(seg.cmd);
1061   sys::swapByteOrder(seg.cmdsize);
1062   sys::swapByteOrder(seg.vmaddr);
1063   sys::swapByteOrder(seg.vmsize);
1064   sys::swapByteOrder(seg.fileoff);
1065   sys::swapByteOrder(seg.filesize);
1066   sys::swapByteOrder(seg.maxprot);
1067   sys::swapByteOrder(seg.initprot);
1068   sys::swapByteOrder(seg.nsects);
1069   sys::swapByteOrder(seg.flags);
1070 }
1071
1072 inline void swapStruct(segment_command &seg) {
1073   sys::swapByteOrder(seg.cmd);
1074   sys::swapByteOrder(seg.cmdsize);
1075   sys::swapByteOrder(seg.vmaddr);
1076   sys::swapByteOrder(seg.vmsize);
1077   sys::swapByteOrder(seg.fileoff);
1078   sys::swapByteOrder(seg.filesize);
1079   sys::swapByteOrder(seg.maxprot);
1080   sys::swapByteOrder(seg.initprot);
1081   sys::swapByteOrder(seg.nsects);
1082   sys::swapByteOrder(seg.flags);
1083 }
1084
1085 inline void swapStruct(section_64 &sect) {
1086   sys::swapByteOrder(sect.addr);
1087   sys::swapByteOrder(sect.size);
1088   sys::swapByteOrder(sect.offset);
1089   sys::swapByteOrder(sect.align);
1090   sys::swapByteOrder(sect.reloff);
1091   sys::swapByteOrder(sect.nreloc);
1092   sys::swapByteOrder(sect.flags);
1093   sys::swapByteOrder(sect.reserved1);
1094   sys::swapByteOrder(sect.reserved2);
1095 }
1096
1097 inline void swapStruct(section &sect) {
1098   sys::swapByteOrder(sect.addr);
1099   sys::swapByteOrder(sect.size);
1100   sys::swapByteOrder(sect.offset);
1101   sys::swapByteOrder(sect.align);
1102   sys::swapByteOrder(sect.reloff);
1103   sys::swapByteOrder(sect.nreloc);
1104   sys::swapByteOrder(sect.flags);
1105   sys::swapByteOrder(sect.reserved1);
1106   sys::swapByteOrder(sect.reserved2);
1107 }
1108
1109 inline void swapStruct(dyld_info_command &info) {
1110   sys::swapByteOrder(info.cmd);
1111   sys::swapByteOrder(info.cmdsize);
1112   sys::swapByteOrder(info.rebase_off);
1113   sys::swapByteOrder(info.rebase_size);
1114   sys::swapByteOrder(info.bind_off);
1115   sys::swapByteOrder(info.bind_size);
1116   sys::swapByteOrder(info.weak_bind_off);
1117   sys::swapByteOrder(info.weak_bind_size);
1118   sys::swapByteOrder(info.lazy_bind_off);
1119   sys::swapByteOrder(info.lazy_bind_size);
1120   sys::swapByteOrder(info.export_off);
1121   sys::swapByteOrder(info.export_size);
1122 }
1123
1124 inline void swapStruct(dylib_command &d) {
1125   sys::swapByteOrder(d.cmd);
1126   sys::swapByteOrder(d.cmdsize);
1127   sys::swapByteOrder(d.dylib.name);
1128   sys::swapByteOrder(d.dylib.timestamp);
1129   sys::swapByteOrder(d.dylib.current_version);
1130   sys::swapByteOrder(d.dylib.compatibility_version);
1131 }
1132
1133 inline void swapStruct(sub_framework_command &s) {
1134   sys::swapByteOrder(s.cmd);
1135   sys::swapByteOrder(s.cmdsize);
1136   sys::swapByteOrder(s.umbrella);
1137 }
1138
1139 inline void swapStruct(sub_umbrella_command &s) {
1140   sys::swapByteOrder(s.cmd);
1141   sys::swapByteOrder(s.cmdsize);
1142   sys::swapByteOrder(s.sub_umbrella);
1143 }
1144
1145 inline void swapStruct(sub_library_command &s) {
1146   sys::swapByteOrder(s.cmd);
1147   sys::swapByteOrder(s.cmdsize);
1148   sys::swapByteOrder(s.sub_library);
1149 }
1150
1151 inline void swapStruct(sub_client_command &s) {
1152   sys::swapByteOrder(s.cmd);
1153   sys::swapByteOrder(s.cmdsize);
1154   sys::swapByteOrder(s.client);
1155 }
1156
1157 inline void swapStruct(routines_command &r) {
1158   sys::swapByteOrder(r.cmd);
1159   sys::swapByteOrder(r.cmdsize);
1160   sys::swapByteOrder(r.init_address);
1161   sys::swapByteOrder(r.init_module);
1162   sys::swapByteOrder(r.reserved1);
1163   sys::swapByteOrder(r.reserved2);
1164   sys::swapByteOrder(r.reserved3);
1165   sys::swapByteOrder(r.reserved4);
1166   sys::swapByteOrder(r.reserved5);
1167   sys::swapByteOrder(r.reserved6);
1168 }
1169
1170 inline void swapStruct(routines_command_64 &r) {
1171   sys::swapByteOrder(r.cmd);
1172   sys::swapByteOrder(r.cmdsize);
1173   sys::swapByteOrder(r.init_address);
1174   sys::swapByteOrder(r.init_module);
1175   sys::swapByteOrder(r.reserved1);
1176   sys::swapByteOrder(r.reserved2);
1177   sys::swapByteOrder(r.reserved3);
1178   sys::swapByteOrder(r.reserved4);
1179   sys::swapByteOrder(r.reserved5);
1180   sys::swapByteOrder(r.reserved6);
1181 }
1182
1183 inline void swapStruct(thread_command &t) {
1184   sys::swapByteOrder(t.cmd);
1185   sys::swapByteOrder(t.cmdsize);
1186 }
1187
1188 inline void swapStruct(dylinker_command &d) {
1189   sys::swapByteOrder(d.cmd);
1190   sys::swapByteOrder(d.cmdsize);
1191   sys::swapByteOrder(d.name);
1192 }
1193
1194 inline void swapStruct(uuid_command &u) {
1195   sys::swapByteOrder(u.cmd);
1196   sys::swapByteOrder(u.cmdsize);
1197 }
1198
1199 inline void swapStruct(rpath_command &r) {
1200   sys::swapByteOrder(r.cmd);
1201   sys::swapByteOrder(r.cmdsize);
1202   sys::swapByteOrder(r.path);
1203 }
1204
1205 inline void swapStruct(source_version_command &s) {
1206   sys::swapByteOrder(s.cmd);
1207   sys::swapByteOrder(s.cmdsize);
1208   sys::swapByteOrder(s.version);
1209 }
1210
1211 inline void swapStruct(entry_point_command &e) {
1212   sys::swapByteOrder(e.cmd);
1213   sys::swapByteOrder(e.cmdsize);
1214   sys::swapByteOrder(e.entryoff);
1215   sys::swapByteOrder(e.stacksize);
1216 }
1217
1218 inline void swapStruct(encryption_info_command &e) {
1219   sys::swapByteOrder(e.cmd);
1220   sys::swapByteOrder(e.cmdsize);
1221   sys::swapByteOrder(e.cryptoff);
1222   sys::swapByteOrder(e.cryptsize);
1223   sys::swapByteOrder(e.cryptid);
1224 }
1225
1226 inline void swapStruct(encryption_info_command_64 &e) {
1227   sys::swapByteOrder(e.cmd);
1228   sys::swapByteOrder(e.cmdsize);
1229   sys::swapByteOrder(e.cryptoff);
1230   sys::swapByteOrder(e.cryptsize);
1231   sys::swapByteOrder(e.cryptid);
1232   sys::swapByteOrder(e.pad);
1233 }
1234
1235 inline void swapStruct(dysymtab_command &dst) {
1236   sys::swapByteOrder(dst.cmd);
1237   sys::swapByteOrder(dst.cmdsize);
1238   sys::swapByteOrder(dst.ilocalsym);
1239   sys::swapByteOrder(dst.nlocalsym);
1240   sys::swapByteOrder(dst.iextdefsym);
1241   sys::swapByteOrder(dst.nextdefsym);
1242   sys::swapByteOrder(dst.iundefsym);
1243   sys::swapByteOrder(dst.nundefsym);
1244   sys::swapByteOrder(dst.tocoff);
1245   sys::swapByteOrder(dst.ntoc);
1246   sys::swapByteOrder(dst.modtaboff);
1247   sys::swapByteOrder(dst.nmodtab);
1248   sys::swapByteOrder(dst.extrefsymoff);
1249   sys::swapByteOrder(dst.nextrefsyms);
1250   sys::swapByteOrder(dst.indirectsymoff);
1251   sys::swapByteOrder(dst.nindirectsyms);
1252   sys::swapByteOrder(dst.extreloff);
1253   sys::swapByteOrder(dst.nextrel);
1254   sys::swapByteOrder(dst.locreloff);
1255   sys::swapByteOrder(dst.nlocrel);
1256 }
1257
1258 inline void swapStruct(any_relocation_info &reloc) {
1259   sys::swapByteOrder(reloc.r_word0);
1260   sys::swapByteOrder(reloc.r_word1);
1261 }
1262
1263 inline void swapStruct(nlist_base &S) {
1264   sys::swapByteOrder(S.n_strx);
1265   sys::swapByteOrder(S.n_desc);
1266 }
1267
1268 inline void swapStruct(nlist &sym) {
1269   sys::swapByteOrder(sym.n_strx);
1270   sys::swapByteOrder(sym.n_desc);
1271   sys::swapByteOrder(sym.n_value);
1272 }
1273
1274 inline void swapStruct(nlist_64 &sym) {
1275   sys::swapByteOrder(sym.n_strx);
1276   sys::swapByteOrder(sym.n_desc);
1277   sys::swapByteOrder(sym.n_value);
1278 }
1279
1280 inline void swapStruct(linkedit_data_command &C) {
1281   sys::swapByteOrder(C.cmd);
1282   sys::swapByteOrder(C.cmdsize);
1283   sys::swapByteOrder(C.dataoff);
1284   sys::swapByteOrder(C.datasize);
1285 }
1286
1287 inline void swapStruct(linker_option_command &C) {
1288   sys::swapByteOrder(C.cmd);
1289   sys::swapByteOrder(C.cmdsize);
1290   sys::swapByteOrder(C.count);
1291 }
1292
1293 inline void swapStruct(version_min_command &C) {
1294   sys::swapByteOrder(C.cmd);
1295   sys::swapByteOrder(C.cmdsize);
1296   sys::swapByteOrder(C.version);
1297   sys::swapByteOrder(C.sdk);
1298 }
1299
1300 inline void swapStruct(note_command &C) {
1301   sys::swapByteOrder(C.cmd);
1302   sys::swapByteOrder(C.cmdsize);
1303   sys::swapByteOrder(C.offset);
1304   sys::swapByteOrder(C.size);
1305 }
1306
1307 inline void swapStruct(build_version_command &C) {
1308   sys::swapByteOrder(C.cmd);
1309   sys::swapByteOrder(C.cmdsize);
1310   sys::swapByteOrder(C.platform);
1311   sys::swapByteOrder(C.minos);
1312   sys::swapByteOrder(C.sdk);
1313   sys::swapByteOrder(C.ntools);
1314 }
1315
1316 inline void swapStruct(build_tool_version &C) {
1317   sys::swapByteOrder(C.tool);
1318   sys::swapByteOrder(C.version);
1319 }
1320
1321 inline void swapStruct(data_in_code_entry &C) {
1322   sys::swapByteOrder(C.offset);
1323   sys::swapByteOrder(C.length);
1324   sys::swapByteOrder(C.kind);
1325 }
1326
1327 inline void swapStruct(uint32_t &C) { sys::swapByteOrder(C); }
1328
1329 // The prebind_cksum_command is obsolete and no longer supported.
1330 inline void swapStruct(prebind_cksum_command &C) {
1331   sys::swapByteOrder(C.cmd);
1332   sys::swapByteOrder(C.cmdsize);
1333   sys::swapByteOrder(C.cksum);
1334 }
1335
1336 // The twolevel_hints_command is obsolete and no longer supported.
1337 inline void swapStruct(twolevel_hints_command &C) {
1338   sys::swapByteOrder(C.cmd);
1339   sys::swapByteOrder(C.cmdsize);
1340   sys::swapByteOrder(C.offset);
1341   sys::swapByteOrder(C.nhints);
1342 }
1343
1344 // The prebound_dylib_command is obsolete and no longer supported.
1345 inline void swapStruct(prebound_dylib_command &C) {
1346   sys::swapByteOrder(C.cmd);
1347   sys::swapByteOrder(C.cmdsize);
1348   sys::swapByteOrder(C.name);
1349   sys::swapByteOrder(C.nmodules);
1350   sys::swapByteOrder(C.linked_modules);
1351 }
1352
1353 // The fvmfile_command is obsolete and no longer supported.
1354 inline void swapStruct(fvmfile_command &C) {
1355   sys::swapByteOrder(C.cmd);
1356   sys::swapByteOrder(C.cmdsize);
1357   sys::swapByteOrder(C.name);
1358   sys::swapByteOrder(C.header_addr);
1359 }
1360
1361 // The symseg_command is obsolete and no longer supported.
1362 inline void swapStruct(symseg_command &C) {
1363   sys::swapByteOrder(C.cmd);
1364   sys::swapByteOrder(C.cmdsize);
1365   sys::swapByteOrder(C.offset);
1366   sys::swapByteOrder(C.size);
1367 }
1368
1369 // The ident_command is obsolete and no longer supported.
1370 inline void swapStruct(ident_command &C) {
1371   sys::swapByteOrder(C.cmd);
1372   sys::swapByteOrder(C.cmdsize);
1373 }
1374
1375 inline void swapStruct(fvmlib &C) {
1376   sys::swapByteOrder(C.name);
1377   sys::swapByteOrder(C.minor_version);
1378   sys::swapByteOrder(C.header_addr);
1379 }
1380
1381 // The fvmlib_command is obsolete and no longer supported.
1382 inline void swapStruct(fvmlib_command &C) {
1383   sys::swapByteOrder(C.cmd);
1384   sys::swapByteOrder(C.cmdsize);
1385   swapStruct(C.fvmlib);
1386 }
1387
1388 // Get/Set functions from <mach-o/nlist.h>
1389
1390 inline uint16_t GET_LIBRARY_ORDINAL(uint16_t n_desc) {
1391   return (((n_desc) >> 8u) & 0xffu);
1392 }
1393
1394 inline void SET_LIBRARY_ORDINAL(uint16_t &n_desc, uint8_t ordinal) {
1395   n_desc = (((n_desc)&0x00ff) | (((ordinal)&0xff) << 8));
1396 }
1397
1398 inline uint8_t GET_COMM_ALIGN(uint16_t n_desc) {
1399   return (n_desc >> 8u) & 0x0fu;
1400 }
1401
1402 inline void SET_COMM_ALIGN(uint16_t &n_desc, uint8_t align) {
1403   n_desc = ((n_desc & 0xf0ffu) | ((align & 0x0fu) << 8u));
1404 }
1405
1406 // Enums from <mach/machine.h>
1407 enum : uint32_t {
1408   // Capability bits used in the definition of cpu_type.
1409   CPU_ARCH_MASK = 0xff000000, // Mask for architecture bits
1410   CPU_ARCH_ABI64 = 0x01000000, // 64 bit ABI
1411   CPU_ARCH_ABI64_32 = 0x02000000, // ILP32 ABI on 64-bit hardware
1412 };
1413
1414 // Constants for the cputype field.
1415 enum CPUType {
1416   CPU_TYPE_ANY = -1,
1417   CPU_TYPE_X86 = 7,
1418   CPU_TYPE_I386 = CPU_TYPE_X86,
1419   CPU_TYPE_X86_64 = CPU_TYPE_X86 | CPU_ARCH_ABI64,
1420   /* CPU_TYPE_MIPS      = 8, */
1421   CPU_TYPE_MC98000 = 10, // Old Motorola PowerPC
1422   CPU_TYPE_ARM = 12,
1423   CPU_TYPE_ARM64 = CPU_TYPE_ARM | CPU_ARCH_ABI64,
1424   CPU_TYPE_ARM64_32 = CPU_TYPE_ARM | CPU_ARCH_ABI64_32,
1425   CPU_TYPE_SPARC = 14,
1426   CPU_TYPE_POWERPC = 18,
1427   CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64
1428 };
1429
1430 enum : uint32_t {
1431   // Capability bits used in the definition of cpusubtype.
1432   CPU_SUBTYPE_MASK = 0xff000000,  // Mask for architecture bits
1433   CPU_SUBTYPE_LIB64 = 0x80000000, // 64 bit libraries
1434
1435   // Special CPU subtype constants.
1436   CPU_SUBTYPE_MULTIPLE = ~0u
1437 };
1438
1439 // Constants for the cpusubtype field.
1440 enum CPUSubTypeX86 {
1441   CPU_SUBTYPE_I386_ALL = 3,
1442   CPU_SUBTYPE_386 = 3,
1443   CPU_SUBTYPE_486 = 4,
1444   CPU_SUBTYPE_486SX = 0x84,
1445   CPU_SUBTYPE_586 = 5,
1446   CPU_SUBTYPE_PENT = CPU_SUBTYPE_586,
1447   CPU_SUBTYPE_PENTPRO = 0x16,
1448   CPU_SUBTYPE_PENTII_M3 = 0x36,
1449   CPU_SUBTYPE_PENTII_M5 = 0x56,
1450   CPU_SUBTYPE_CELERON = 0x67,
1451   CPU_SUBTYPE_CELERON_MOBILE = 0x77,
1452   CPU_SUBTYPE_PENTIUM_3 = 0x08,
1453   CPU_SUBTYPE_PENTIUM_3_M = 0x18,
1454   CPU_SUBTYPE_PENTIUM_3_XEON = 0x28,
1455   CPU_SUBTYPE_PENTIUM_M = 0x09,
1456   CPU_SUBTYPE_PENTIUM_4 = 0x0a,
1457   CPU_SUBTYPE_PENTIUM_4_M = 0x1a,
1458   CPU_SUBTYPE_ITANIUM = 0x0b,
1459   CPU_SUBTYPE_ITANIUM_2 = 0x1b,
1460   CPU_SUBTYPE_XEON = 0x0c,
1461   CPU_SUBTYPE_XEON_MP = 0x1c,
1462
1463   CPU_SUBTYPE_X86_ALL = 3,
1464   CPU_SUBTYPE_X86_64_ALL = 3,
1465   CPU_SUBTYPE_X86_ARCH1 = 4,
1466   CPU_SUBTYPE_X86_64_H = 8
1467 };
1468 inline int CPU_SUBTYPE_INTEL(int Family, int Model) {
1469   return Family | (Model << 4);
1470 }
1471 inline int CPU_SUBTYPE_INTEL_FAMILY(CPUSubTypeX86 ST) {
1472   return ((int)ST) & 0x0f;
1473 }
1474 inline int CPU_SUBTYPE_INTEL_MODEL(CPUSubTypeX86 ST) { return ((int)ST) >> 4; }
1475 enum { CPU_SUBTYPE_INTEL_FAMILY_MAX = 15, CPU_SUBTYPE_INTEL_MODEL_ALL = 0 };
1476
1477 enum CPUSubTypeARM {
1478   CPU_SUBTYPE_ARM_ALL = 0,
1479   CPU_SUBTYPE_ARM_V4T = 5,
1480   CPU_SUBTYPE_ARM_V6 = 6,
1481   CPU_SUBTYPE_ARM_V5 = 7,
1482   CPU_SUBTYPE_ARM_V5TEJ = 7,
1483   CPU_SUBTYPE_ARM_XSCALE = 8,
1484   CPU_SUBTYPE_ARM_V7 = 9,
1485   //  unused  ARM_V7F     = 10,
1486   CPU_SUBTYPE_ARM_V7S = 11,
1487   CPU_SUBTYPE_ARM_V7K = 12,
1488   CPU_SUBTYPE_ARM_V6M = 14,
1489   CPU_SUBTYPE_ARM_V7M = 15,
1490   CPU_SUBTYPE_ARM_V7EM = 16
1491 };
1492
1493 enum CPUSubTypeARM64 {
1494   CPU_SUBTYPE_ARM64_ALL = 0,
1495   CPU_SUBTYPE_ARM64E = 2,
1496 };
1497
1498 enum CPUSubTypeARM64_32 { CPU_SUBTYPE_ARM64_32_V8 = 1 };
1499
1500 enum CPUSubTypeSPARC { CPU_SUBTYPE_SPARC_ALL = 0 };
1501
1502 enum CPUSubTypePowerPC {
1503   CPU_SUBTYPE_POWERPC_ALL = 0,
1504   CPU_SUBTYPE_POWERPC_601 = 1,
1505   CPU_SUBTYPE_POWERPC_602 = 2,
1506   CPU_SUBTYPE_POWERPC_603 = 3,
1507   CPU_SUBTYPE_POWERPC_603e = 4,
1508   CPU_SUBTYPE_POWERPC_603ev = 5,
1509   CPU_SUBTYPE_POWERPC_604 = 6,
1510   CPU_SUBTYPE_POWERPC_604e = 7,
1511   CPU_SUBTYPE_POWERPC_620 = 8,
1512   CPU_SUBTYPE_POWERPC_750 = 9,
1513   CPU_SUBTYPE_POWERPC_7400 = 10,
1514   CPU_SUBTYPE_POWERPC_7450 = 11,
1515   CPU_SUBTYPE_POWERPC_970 = 100,
1516
1517   CPU_SUBTYPE_MC980000_ALL = CPU_SUBTYPE_POWERPC_ALL,
1518   CPU_SUBTYPE_MC98601 = CPU_SUBTYPE_POWERPC_601
1519 };
1520
1521 struct x86_thread_state32_t {
1522   uint32_t eax;
1523   uint32_t ebx;
1524   uint32_t ecx;
1525   uint32_t edx;
1526   uint32_t edi;
1527   uint32_t esi;
1528   uint32_t ebp;
1529   uint32_t esp;
1530   uint32_t ss;
1531   uint32_t eflags;
1532   uint32_t eip;
1533   uint32_t cs;
1534   uint32_t ds;
1535   uint32_t es;
1536   uint32_t fs;
1537   uint32_t gs;
1538 };
1539
1540 struct x86_thread_state64_t {
1541   uint64_t rax;
1542   uint64_t rbx;
1543   uint64_t rcx;
1544   uint64_t rdx;
1545   uint64_t rdi;
1546   uint64_t rsi;
1547   uint64_t rbp;
1548   uint64_t rsp;
1549   uint64_t r8;
1550   uint64_t r9;
1551   uint64_t r10;
1552   uint64_t r11;
1553   uint64_t r12;
1554   uint64_t r13;
1555   uint64_t r14;
1556   uint64_t r15;
1557   uint64_t rip;
1558   uint64_t rflags;
1559   uint64_t cs;
1560   uint64_t fs;
1561   uint64_t gs;
1562 };
1563
1564 enum x86_fp_control_precis {
1565   x86_FP_PREC_24B = 0,
1566   x86_FP_PREC_53B = 2,
1567   x86_FP_PREC_64B = 3
1568 };
1569
1570 enum x86_fp_control_rc {
1571   x86_FP_RND_NEAR = 0,
1572   x86_FP_RND_DOWN = 1,
1573   x86_FP_RND_UP = 2,
1574   x86_FP_CHOP = 3
1575 };
1576
1577 struct fp_control_t {
1578   unsigned short invalid : 1, denorm : 1, zdiv : 1, ovrfl : 1, undfl : 1,
1579       precis : 1, : 2, pc : 2, rc : 2, : 1, : 3;
1580 };
1581
1582 struct fp_status_t {
1583   unsigned short invalid : 1, denorm : 1, zdiv : 1, ovrfl : 1, undfl : 1,
1584       precis : 1, stkflt : 1, errsumm : 1, c0 : 1, c1 : 1, c2 : 1, tos : 3,
1585       c3 : 1, busy : 1;
1586 };
1587
1588 struct mmst_reg_t {
1589   char mmst_reg[10];
1590   char mmst_rsrv[6];
1591 };
1592
1593 struct xmm_reg_t {
1594   char xmm_reg[16];
1595 };
1596
1597 struct x86_float_state64_t {
1598   int32_t fpu_reserved[2];
1599   fp_control_t fpu_fcw;
1600   fp_status_t fpu_fsw;
1601   uint8_t fpu_ftw;
1602   uint8_t fpu_rsrv1;
1603   uint16_t fpu_fop;
1604   uint32_t fpu_ip;
1605   uint16_t fpu_cs;
1606   uint16_t fpu_rsrv2;
1607   uint32_t fpu_dp;
1608   uint16_t fpu_ds;
1609   uint16_t fpu_rsrv3;
1610   uint32_t fpu_mxcsr;
1611   uint32_t fpu_mxcsrmask;
1612   mmst_reg_t fpu_stmm0;
1613   mmst_reg_t fpu_stmm1;
1614   mmst_reg_t fpu_stmm2;
1615   mmst_reg_t fpu_stmm3;
1616   mmst_reg_t fpu_stmm4;
1617   mmst_reg_t fpu_stmm5;
1618   mmst_reg_t fpu_stmm6;
1619   mmst_reg_t fpu_stmm7;
1620   xmm_reg_t fpu_xmm0;
1621   xmm_reg_t fpu_xmm1;
1622   xmm_reg_t fpu_xmm2;
1623   xmm_reg_t fpu_xmm3;
1624   xmm_reg_t fpu_xmm4;
1625   xmm_reg_t fpu_xmm5;
1626   xmm_reg_t fpu_xmm6;
1627   xmm_reg_t fpu_xmm7;
1628   xmm_reg_t fpu_xmm8;
1629   xmm_reg_t fpu_xmm9;
1630   xmm_reg_t fpu_xmm10;
1631   xmm_reg_t fpu_xmm11;
1632   xmm_reg_t fpu_xmm12;
1633   xmm_reg_t fpu_xmm13;
1634   xmm_reg_t fpu_xmm14;
1635   xmm_reg_t fpu_xmm15;
1636   char fpu_rsrv4[6 * 16];
1637   uint32_t fpu_reserved1;
1638 };
1639
1640 struct x86_exception_state64_t {
1641   uint16_t trapno;
1642   uint16_t cpu;
1643   uint32_t err;
1644   uint64_t faultvaddr;
1645 };
1646
1647 inline void swapStruct(x86_thread_state32_t &x) {
1648   sys::swapByteOrder(x.eax);
1649   sys::swapByteOrder(x.ebx);
1650   sys::swapByteOrder(x.ecx);
1651   sys::swapByteOrder(x.edx);
1652   sys::swapByteOrder(x.edi);
1653   sys::swapByteOrder(x.esi);
1654   sys::swapByteOrder(x.ebp);
1655   sys::swapByteOrder(x.esp);
1656   sys::swapByteOrder(x.ss);
1657   sys::swapByteOrder(x.eflags);
1658   sys::swapByteOrder(x.eip);
1659   sys::swapByteOrder(x.cs);
1660   sys::swapByteOrder(x.ds);
1661   sys::swapByteOrder(x.es);
1662   sys::swapByteOrder(x.fs);
1663   sys::swapByteOrder(x.gs);
1664 }
1665
1666 inline void swapStruct(x86_thread_state64_t &x) {
1667   sys::swapByteOrder(x.rax);
1668   sys::swapByteOrder(x.rbx);
1669   sys::swapByteOrder(x.rcx);
1670   sys::swapByteOrder(x.rdx);
1671   sys::swapByteOrder(x.rdi);
1672   sys::swapByteOrder(x.rsi);
1673   sys::swapByteOrder(x.rbp);
1674   sys::swapByteOrder(x.rsp);
1675   sys::swapByteOrder(x.r8);
1676   sys::swapByteOrder(x.r9);
1677   sys::swapByteOrder(x.r10);
1678   sys::swapByteOrder(x.r11);
1679   sys::swapByteOrder(x.r12);
1680   sys::swapByteOrder(x.r13);
1681   sys::swapByteOrder(x.r14);
1682   sys::swapByteOrder(x.r15);
1683   sys::swapByteOrder(x.rip);
1684   sys::swapByteOrder(x.rflags);
1685   sys::swapByteOrder(x.cs);
1686   sys::swapByteOrder(x.fs);
1687   sys::swapByteOrder(x.gs);
1688 }
1689
1690 inline void swapStruct(x86_float_state64_t &x) {
1691   sys::swapByteOrder(x.fpu_reserved[0]);
1692   sys::swapByteOrder(x.fpu_reserved[1]);
1693   // TODO swap: fp_control_t fpu_fcw;
1694   // TODO swap: fp_status_t fpu_fsw;
1695   sys::swapByteOrder(x.fpu_fop);
1696   sys::swapByteOrder(x.fpu_ip);
1697   sys::swapByteOrder(x.fpu_cs);
1698   sys::swapByteOrder(x.fpu_rsrv2);
1699   sys::swapByteOrder(x.fpu_dp);
1700   sys::swapByteOrder(x.fpu_ds);
1701   sys::swapByteOrder(x.fpu_rsrv3);
1702   sys::swapByteOrder(x.fpu_mxcsr);
1703   sys::swapByteOrder(x.fpu_mxcsrmask);
1704   sys::swapByteOrder(x.fpu_reserved1);
1705 }
1706
1707 inline void swapStruct(x86_exception_state64_t &x) {
1708   sys::swapByteOrder(x.trapno);
1709   sys::swapByteOrder(x.cpu);
1710   sys::swapByteOrder(x.err);
1711   sys::swapByteOrder(x.faultvaddr);
1712 }
1713
1714 struct x86_state_hdr_t {
1715   uint32_t flavor;
1716   uint32_t count;
1717 };
1718
1719 struct x86_thread_state_t {
1720   x86_state_hdr_t tsh;
1721   union {
1722     x86_thread_state64_t ts64;
1723     x86_thread_state32_t ts32;
1724   } uts;
1725 };
1726
1727 struct x86_float_state_t {
1728   x86_state_hdr_t fsh;
1729   union {
1730     x86_float_state64_t fs64;
1731   } ufs;
1732 };
1733
1734 struct x86_exception_state_t {
1735   x86_state_hdr_t esh;
1736   union {
1737     x86_exception_state64_t es64;
1738   } ues;
1739 };
1740
1741 inline void swapStruct(x86_state_hdr_t &x) {
1742   sys::swapByteOrder(x.flavor);
1743   sys::swapByteOrder(x.count);
1744 }
1745
1746 enum X86ThreadFlavors {
1747   x86_THREAD_STATE32 = 1,
1748   x86_FLOAT_STATE32 = 2,
1749   x86_EXCEPTION_STATE32 = 3,
1750   x86_THREAD_STATE64 = 4,
1751   x86_FLOAT_STATE64 = 5,
1752   x86_EXCEPTION_STATE64 = 6,
1753   x86_THREAD_STATE = 7,
1754   x86_FLOAT_STATE = 8,
1755   x86_EXCEPTION_STATE = 9,
1756   x86_DEBUG_STATE32 = 10,
1757   x86_DEBUG_STATE64 = 11,
1758   x86_DEBUG_STATE = 12
1759 };
1760
1761 inline void swapStruct(x86_thread_state_t &x) {
1762   swapStruct(x.tsh);
1763   if (x.tsh.flavor == x86_THREAD_STATE64)
1764     swapStruct(x.uts.ts64);
1765 }
1766
1767 inline void swapStruct(x86_float_state_t &x) {
1768   swapStruct(x.fsh);
1769   if (x.fsh.flavor == x86_FLOAT_STATE64)
1770     swapStruct(x.ufs.fs64);
1771 }
1772
1773 inline void swapStruct(x86_exception_state_t &x) {
1774   swapStruct(x.esh);
1775   if (x.esh.flavor == x86_EXCEPTION_STATE64)
1776     swapStruct(x.ues.es64);
1777 }
1778
1779 const uint32_t x86_THREAD_STATE32_COUNT =
1780     sizeof(x86_thread_state32_t) / sizeof(uint32_t);
1781
1782 const uint32_t x86_THREAD_STATE64_COUNT =
1783     sizeof(x86_thread_state64_t) / sizeof(uint32_t);
1784 const uint32_t x86_FLOAT_STATE64_COUNT =
1785     sizeof(x86_float_state64_t) / sizeof(uint32_t);
1786 const uint32_t x86_EXCEPTION_STATE64_COUNT =
1787     sizeof(x86_exception_state64_t) / sizeof(uint32_t);
1788
1789 const uint32_t x86_THREAD_STATE_COUNT =
1790     sizeof(x86_thread_state_t) / sizeof(uint32_t);
1791 const uint32_t x86_FLOAT_STATE_COUNT =
1792     sizeof(x86_float_state_t) / sizeof(uint32_t);
1793 const uint32_t x86_EXCEPTION_STATE_COUNT =
1794     sizeof(x86_exception_state_t) / sizeof(uint32_t);
1795
1796 struct arm_thread_state32_t {
1797   uint32_t r[13];
1798   uint32_t sp;
1799   uint32_t lr;
1800   uint32_t pc;
1801   uint32_t cpsr;
1802 };
1803
1804 inline void swapStruct(arm_thread_state32_t &x) {
1805   for (int i = 0; i < 13; i++)
1806     sys::swapByteOrder(x.r[i]);
1807   sys::swapByteOrder(x.sp);
1808   sys::swapByteOrder(x.lr);
1809   sys::swapByteOrder(x.pc);
1810   sys::swapByteOrder(x.cpsr);
1811 }
1812
1813 struct arm_thread_state64_t {
1814   uint64_t x[29];
1815   uint64_t fp;
1816   uint64_t lr;
1817   uint64_t sp;
1818   uint64_t pc;
1819   uint32_t cpsr;
1820   uint32_t pad;
1821 };
1822
1823 inline void swapStruct(arm_thread_state64_t &x) {
1824   for (int i = 0; i < 29; i++)
1825     sys::swapByteOrder(x.x[i]);
1826   sys::swapByteOrder(x.fp);
1827   sys::swapByteOrder(x.lr);
1828   sys::swapByteOrder(x.sp);
1829   sys::swapByteOrder(x.pc);
1830   sys::swapByteOrder(x.cpsr);
1831 }
1832
1833 struct arm_state_hdr_t {
1834   uint32_t flavor;
1835   uint32_t count;
1836 };
1837
1838 struct arm_thread_state_t {
1839   arm_state_hdr_t tsh;
1840   union {
1841     arm_thread_state32_t ts32;
1842   } uts;
1843 };
1844
1845 inline void swapStruct(arm_state_hdr_t &x) {
1846   sys::swapByteOrder(x.flavor);
1847   sys::swapByteOrder(x.count);
1848 }
1849
1850 enum ARMThreadFlavors {
1851   ARM_THREAD_STATE = 1,
1852   ARM_VFP_STATE = 2,
1853   ARM_EXCEPTION_STATE = 3,
1854   ARM_DEBUG_STATE = 4,
1855   ARN_THREAD_STATE_NONE = 5,
1856   ARM_THREAD_STATE64 = 6,
1857   ARM_EXCEPTION_STATE64 = 7
1858 };
1859
1860 inline void swapStruct(arm_thread_state_t &x) {
1861   swapStruct(x.tsh);
1862   if (x.tsh.flavor == ARM_THREAD_STATE)
1863     swapStruct(x.uts.ts32);
1864 }
1865
1866 const uint32_t ARM_THREAD_STATE_COUNT =
1867     sizeof(arm_thread_state32_t) / sizeof(uint32_t);
1868
1869 const uint32_t ARM_THREAD_STATE64_COUNT =
1870     sizeof(arm_thread_state64_t) / sizeof(uint32_t);
1871
1872 struct ppc_thread_state32_t {
1873   uint32_t srr0;
1874   uint32_t srr1;
1875   uint32_t r0;
1876   uint32_t r1;
1877   uint32_t r2;
1878   uint32_t r3;
1879   uint32_t r4;
1880   uint32_t r5;
1881   uint32_t r6;
1882   uint32_t r7;
1883   uint32_t r8;
1884   uint32_t r9;
1885   uint32_t r10;
1886   uint32_t r11;
1887   uint32_t r12;
1888   uint32_t r13;
1889   uint32_t r14;
1890   uint32_t r15;
1891   uint32_t r16;
1892   uint32_t r17;
1893   uint32_t r18;
1894   uint32_t r19;
1895   uint32_t r20;
1896   uint32_t r21;
1897   uint32_t r22;
1898   uint32_t r23;
1899   uint32_t r24;
1900   uint32_t r25;
1901   uint32_t r26;
1902   uint32_t r27;
1903   uint32_t r28;
1904   uint32_t r29;
1905   uint32_t r30;
1906   uint32_t r31;
1907   uint32_t ct;
1908   uint32_t xer;
1909   uint32_t lr;
1910   uint32_t ctr;
1911   uint32_t mq;
1912   uint32_t vrsave;
1913 };
1914
1915 inline void swapStruct(ppc_thread_state32_t &x) {
1916   sys::swapByteOrder(x.srr0);
1917   sys::swapByteOrder(x.srr1);
1918   sys::swapByteOrder(x.r0);
1919   sys::swapByteOrder(x.r1);
1920   sys::swapByteOrder(x.r2);
1921   sys::swapByteOrder(x.r3);
1922   sys::swapByteOrder(x.r4);
1923   sys::swapByteOrder(x.r5);
1924   sys::swapByteOrder(x.r6);
1925   sys::swapByteOrder(x.r7);
1926   sys::swapByteOrder(x.r8);
1927   sys::swapByteOrder(x.r9);
1928   sys::swapByteOrder(x.r10);
1929   sys::swapByteOrder(x.r11);
1930   sys::swapByteOrder(x.r12);
1931   sys::swapByteOrder(x.r13);
1932   sys::swapByteOrder(x.r14);
1933   sys::swapByteOrder(x.r15);
1934   sys::swapByteOrder(x.r16);
1935   sys::swapByteOrder(x.r17);
1936   sys::swapByteOrder(x.r18);
1937   sys::swapByteOrder(x.r19);
1938   sys::swapByteOrder(x.r20);
1939   sys::swapByteOrder(x.r21);
1940   sys::swapByteOrder(x.r22);
1941   sys::swapByteOrder(x.r23);
1942   sys::swapByteOrder(x.r24);
1943   sys::swapByteOrder(x.r25);
1944   sys::swapByteOrder(x.r26);
1945   sys::swapByteOrder(x.r27);
1946   sys::swapByteOrder(x.r28);
1947   sys::swapByteOrder(x.r29);
1948   sys::swapByteOrder(x.r30);
1949   sys::swapByteOrder(x.r31);
1950   sys::swapByteOrder(x.ct);
1951   sys::swapByteOrder(x.xer);
1952   sys::swapByteOrder(x.lr);
1953   sys::swapByteOrder(x.ctr);
1954   sys::swapByteOrder(x.mq);
1955   sys::swapByteOrder(x.vrsave);
1956 }
1957
1958 struct ppc_state_hdr_t {
1959   uint32_t flavor;
1960   uint32_t count;
1961 };
1962
1963 struct ppc_thread_state_t {
1964   ppc_state_hdr_t tsh;
1965   union {
1966     ppc_thread_state32_t ts32;
1967   } uts;
1968 };
1969
1970 inline void swapStruct(ppc_state_hdr_t &x) {
1971   sys::swapByteOrder(x.flavor);
1972   sys::swapByteOrder(x.count);
1973 }
1974
1975 enum PPCThreadFlavors {
1976   PPC_THREAD_STATE = 1,
1977   PPC_FLOAT_STATE = 2,
1978   PPC_EXCEPTION_STATE = 3,
1979   PPC_VECTOR_STATE = 4,
1980   PPC_THREAD_STATE64 = 5,
1981   PPC_EXCEPTION_STATE64 = 6,
1982   PPC_THREAD_STATE_NONE = 7
1983 };
1984
1985 inline void swapStruct(ppc_thread_state_t &x) {
1986   swapStruct(x.tsh);
1987   if (x.tsh.flavor == PPC_THREAD_STATE)
1988     swapStruct(x.uts.ts32);
1989 }
1990
1991 const uint32_t PPC_THREAD_STATE_COUNT =
1992     sizeof(ppc_thread_state32_t) / sizeof(uint32_t);
1993
1994 // Define a union of all load command structs
1995 #define LOAD_COMMAND_STRUCT(LCStruct) LCStruct LCStruct##_data;
1996
1997 LLVM_PACKED_START
1998 union alignas(4) macho_load_command {
1999 #include "llvm/BinaryFormat/MachO.def"
2000 };
2001 LLVM_PACKED_END
2002
2003 } // end namespace MachO
2004 } // end namespace llvm
2005
2006 #endif