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 589 // The fvmlib_command is obsolete and no longer supported.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