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