1 //===- MachOYAML.cpp - MachO YAMLIO implementation ------------------------===//
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 classes for handling the YAML representation of MachO.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/ObjectYAML/MachOYAML.h"
15 #include "llvm/Support/Casting.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/Support/MachO.h"
18 
19 #include <string.h> // For memcpy, memset and strnlen.
20 
21 namespace llvm {
22 
23 MachOYAML::LoadCommand::~LoadCommand() {}
24 
25 namespace yaml {
26 
27 void ScalarTraits<char_16>::output(const char_16 &Val, void *,
28                                    llvm::raw_ostream &Out) {
29   auto Len = strnlen(&Val[0], 16);
30   Out << StringRef(&Val[0], Len);
31 }
32 
33 StringRef ScalarTraits<char_16>::input(StringRef Scalar, void *, char_16 &Val) {
34   size_t CopySize = 16 >= Scalar.size() ? 16 : Scalar.size();
35   memcpy((void *)Val, Scalar.data(), CopySize);
36 
37   if (Scalar.size() < 16) {
38     memset((void *)&Val[Scalar.size()], 0, 16 - Scalar.size());
39   }
40 
41   return StringRef();
42 }
43 
44 bool ScalarTraits<char_16>::mustQuote(StringRef S) { return needsQuotes(S); }
45 
46 void ScalarTraits<uuid_t>::output(const uuid_t &Val, void *,
47                                   llvm::raw_ostream &Out) {
48   for (int Idx = 0; Idx < 16; ++Idx) {
49     Out << format("%02" PRIX32, Val[Idx]);
50     if (Idx == 3 || Idx == 5 || Idx == 7 || Idx == 9)
51       Out << "-";
52   }
53 }
54 
55 StringRef ScalarTraits<uuid_t>::input(StringRef Scalar, void *, uuid_t &Val) {
56   size_t OutIdx = 0;
57   for (size_t Idx = 0; Idx < Scalar.size(); ++Idx) {
58     if (Scalar[Idx] == '-' || OutIdx >= 16)
59       continue;
60     unsigned long long TempInt;
61     if (getAsUnsignedInteger(Scalar.slice(Idx, Idx + 2), 16, TempInt))
62       return "invalid number";
63     if (TempInt > 0xFF)
64       return "out of range number";
65     Val[OutIdx] = static_cast<uint8_t>(TempInt);
66     ++Idx; // increment idx an extra time because we're consuming 2 chars
67     ++OutIdx;
68   }
69   return StringRef();
70 }
71 
72 bool ScalarTraits<uuid_t>::mustQuote(StringRef S) { return needsQuotes(S); }
73 
74 void MappingTraits<MachOYAML::FileHeader>::mapping(
75     IO &IO, MachOYAML::FileHeader &FileHdr) {
76   IO.mapRequired("magic", FileHdr.magic);
77   IO.mapRequired("cputype", FileHdr.cputype);
78   IO.mapRequired("cpusubtype", FileHdr.cpusubtype);
79   IO.mapRequired("filetype", FileHdr.filetype);
80   IO.mapRequired("ncmds", FileHdr.ncmds);
81   IO.mapRequired("sizeofcmds", FileHdr.sizeofcmds);
82   IO.mapRequired("flags", FileHdr.flags);
83   if (FileHdr.magic == MachO::MH_MAGIC_64 ||
84       FileHdr.magic == MachO::MH_CIGAM_64)
85     IO.mapRequired("reserved", FileHdr.reserved);
86 }
87 
88 void MappingTraits<MachOYAML::Object>::mapping(IO &IO,
89                                                MachOYAML::Object &Object) {
90   // If the context isn't already set, tag the document as !mach-o.
91   // For Fat files there will be a different tag so they can be differentiated.
92   if (!IO.getContext()) {
93     IO.setContext(&Object);
94   }
95   IO.mapTag("!mach-o", true);
96   IO.mapRequired("FileHeader", Object.Header);
97   IO.mapOptional("LoadCommands", Object.LoadCommands);
98   IO.mapOptional("LinkEditData", Object.LinkEdit);
99 
100   if (IO.getContext() == &Object)
101     IO.setContext(nullptr);
102 }
103 
104 void MappingTraits<MachOYAML::FatHeader>::mapping(
105     IO &IO, MachOYAML::FatHeader &FatHeader) {
106   IO.mapRequired("magic", FatHeader.magic);
107   IO.mapRequired("nfat_arch", FatHeader.nfat_arch);
108 }
109 
110 void MappingTraits<MachOYAML::FatArch>::mapping(IO &IO,
111                                                 MachOYAML::FatArch &FatArch) {
112   IO.mapRequired("cputype", FatArch.cputype);
113   IO.mapRequired("cpusubtype", FatArch.cpusubtype);
114   IO.mapRequired("offset", FatArch.offset);
115   IO.mapRequired("size", FatArch.size);
116   IO.mapRequired("align", FatArch.align);
117   IO.mapOptional("reserved", FatArch.reserved,
118                  static_cast<llvm::yaml::Hex32>(0));
119 }
120 
121 void MappingTraits<MachOYAML::UniversalBinary>::mapping(
122     IO &IO, MachOYAML::UniversalBinary &UniversalBinary) {
123   if (!IO.getContext()) {
124     IO.setContext(&UniversalBinary);
125     IO.mapTag("!fat-mach-o", true);
126   }
127   IO.mapRequired("FatHeader", UniversalBinary.Header);
128   IO.mapRequired("FatArchs", UniversalBinary.FatArchs);
129   IO.mapRequired("Slices", UniversalBinary.Slices);
130 
131   if (IO.getContext() == &UniversalBinary)
132     IO.setContext(nullptr);
133 }
134 
135 void MappingTraits<MachOYAML::LinkEditData>::mapping(
136     IO &IO, MachOYAML::LinkEditData &LinkEditData) {
137   IO.mapOptional("RebaseOpcodes", LinkEditData.RebaseOpcodes);
138   IO.mapOptional("BindOpcodes", LinkEditData.BindOpcodes);
139   IO.mapOptional("WeakBindOpcodes", LinkEditData.WeakBindOpcodes);
140   IO.mapOptional("LazyBindOpcodes", LinkEditData.LazyBindOpcodes);
141   if(LinkEditData.ExportTrie.Children.size() > 0 || !IO.outputting())
142     IO.mapOptional("ExportTrie", LinkEditData.ExportTrie);
143   IO.mapOptional("NameList", LinkEditData.NameList);
144   IO.mapOptional("StringTable", LinkEditData.StringTable);
145 }
146 
147 void MappingTraits<MachOYAML::RebaseOpcode>::mapping(
148     IO &IO, MachOYAML::RebaseOpcode &RebaseOpcode) {
149   IO.mapRequired("Opcode", RebaseOpcode.Opcode);
150   IO.mapRequired("Imm", RebaseOpcode.Imm);
151   IO.mapOptional("ExtraData", RebaseOpcode.ExtraData);
152 }
153 
154 void MappingTraits<MachOYAML::BindOpcode>::mapping(
155     IO &IO, MachOYAML::BindOpcode &BindOpcode) {
156   IO.mapRequired("Opcode", BindOpcode.Opcode);
157   IO.mapRequired("Imm", BindOpcode.Imm);
158   IO.mapOptional("ULEBExtraData", BindOpcode.ULEBExtraData);
159   IO.mapOptional("SLEBExtraData", BindOpcode.SLEBExtraData);
160   IO.mapOptional("Symbol", BindOpcode.Symbol);
161 }
162 
163 void MappingTraits<MachOYAML::ExportEntry>::mapping(
164     IO &IO, MachOYAML::ExportEntry &ExportEntry) {
165   IO.mapRequired("TerminalSize", ExportEntry.TerminalSize);
166   IO.mapOptional("NodeOffset", ExportEntry.NodeOffset);
167   IO.mapOptional("Name", ExportEntry.Name);
168   IO.mapOptional("Flags", ExportEntry.Flags);
169   IO.mapOptional("Address", ExportEntry.Address);
170   IO.mapOptional("Other", ExportEntry.Other);
171   IO.mapOptional("ImportName", ExportEntry.ImportName);
172   IO.mapOptional("Children", ExportEntry.Children);
173 }
174 
175 void MappingTraits<MachOYAML::NListEntry>::mapping(
176     IO &IO, MachOYAML::NListEntry &NListEntry) {
177   IO.mapRequired("n_strx", NListEntry.n_strx);
178   IO.mapRequired("n_type", NListEntry.n_type);
179   IO.mapRequired("n_sect", NListEntry.n_sect);
180   IO.mapRequired("n_desc", NListEntry.n_desc);
181   IO.mapRequired("n_value", NListEntry.n_value);
182 }
183 
184 template <typename StructType>
185 void mapLoadCommandData(IO &IO, MachOYAML::LoadCommand &LoadCommand) {}
186 
187 template <>
188 void mapLoadCommandData<MachO::segment_command>(
189     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
190   IO.mapOptional("Sections", LoadCommand.Sections);
191 }
192 
193 template <>
194 void mapLoadCommandData<MachO::segment_command_64>(
195     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
196   IO.mapOptional("Sections", LoadCommand.Sections);
197 }
198 
199 template <>
200 void mapLoadCommandData<MachO::dylib_command>(
201     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
202   IO.mapOptional("PayloadString", LoadCommand.PayloadString);
203 }
204 
205 template <>
206 void mapLoadCommandData<MachO::rpath_command>(
207     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
208   IO.mapOptional("PayloadString", LoadCommand.PayloadString);
209 }
210 
211 template <>
212 void mapLoadCommandData<MachO::dylinker_command>(
213     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
214   IO.mapOptional("PayloadString", LoadCommand.PayloadString);
215 }
216 
217 void MappingTraits<MachOYAML::LoadCommand>::mapping(
218     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
219   MachO::LoadCommandType TempCmd = static_cast<MachO::LoadCommandType>(
220       LoadCommand.Data.load_command_data.cmd);
221   IO.mapRequired("cmd", TempCmd);
222   LoadCommand.Data.load_command_data.cmd = TempCmd;
223   IO.mapRequired("cmdsize", LoadCommand.Data.load_command_data.cmdsize);
224 
225 #define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct)                         \
226   case MachO::LCName:                                                          \
227     MappingTraits<MachO::LCStruct>::mapping(IO,                                \
228                                             LoadCommand.Data.LCStruct##_data); \
229     mapLoadCommandData<MachO::LCStruct>(IO, LoadCommand);                      \
230     break;
231 
232   switch (LoadCommand.Data.load_command_data.cmd) {
233 #include "llvm/Support/MachO.def"
234   }
235   IO.mapOptional("PayloadBytes", LoadCommand.PayloadBytes);
236   IO.mapOptional("ZeroPadBytes", LoadCommand.ZeroPadBytes, (uint64_t)0ull);
237 }
238 
239 void MappingTraits<MachO::dyld_info_command>::mapping(
240     IO &IO, MachO::dyld_info_command &LoadCommand) {
241   IO.mapRequired("rebase_off", LoadCommand.rebase_off);
242   IO.mapRequired("rebase_size", LoadCommand.rebase_size);
243   IO.mapRequired("bind_off", LoadCommand.bind_off);
244   IO.mapRequired("bind_size", LoadCommand.bind_size);
245   IO.mapRequired("weak_bind_off", LoadCommand.weak_bind_off);
246   IO.mapRequired("weak_bind_size", LoadCommand.weak_bind_size);
247   IO.mapRequired("lazy_bind_off", LoadCommand.lazy_bind_off);
248   IO.mapRequired("lazy_bind_size", LoadCommand.lazy_bind_size);
249   IO.mapRequired("export_off", LoadCommand.export_off);
250   IO.mapRequired("export_size", LoadCommand.export_size);
251 }
252 
253 void MappingTraits<MachOYAML::Section>::mapping(IO &IO,
254                                                 MachOYAML::Section &Section) {
255   IO.mapRequired("sectname", Section.sectname);
256   IO.mapRequired("segname", Section.segname);
257   IO.mapRequired("addr", Section.addr);
258   IO.mapRequired("size", Section.size);
259   IO.mapRequired("offset", Section.offset);
260   IO.mapRequired("align", Section.align);
261   IO.mapRequired("reloff", Section.reloff);
262   IO.mapRequired("nreloc", Section.nreloc);
263   IO.mapRequired("flags", Section.flags);
264   IO.mapRequired("reserved1", Section.reserved1);
265   IO.mapRequired("reserved2", Section.reserved2);
266   IO.mapOptional("reserved3", Section.reserved3);
267 }
268 
269 void MappingTraits<MachO::dylib>::mapping(IO &IO, MachO::dylib &DylibStruct) {
270   IO.mapRequired("name", DylibStruct.name);
271   IO.mapRequired("timestamp", DylibStruct.timestamp);
272   IO.mapRequired("current_version", DylibStruct.current_version);
273   IO.mapRequired("compatibility_version", DylibStruct.compatibility_version);
274 }
275 
276 void MappingTraits<MachO::dylib_command>::mapping(
277     IO &IO, MachO::dylib_command &LoadCommand) {
278   IO.mapRequired("dylib", LoadCommand.dylib);
279 }
280 
281 void MappingTraits<MachO::dylinker_command>::mapping(
282     IO &IO, MachO::dylinker_command &LoadCommand) {
283 
284   IO.mapRequired("name", LoadCommand.name);
285 }
286 
287 void MappingTraits<MachO::dysymtab_command>::mapping(
288     IO &IO, MachO::dysymtab_command &LoadCommand) {
289 
290   IO.mapRequired("ilocalsym", LoadCommand.ilocalsym);
291   IO.mapRequired("nlocalsym", LoadCommand.nlocalsym);
292   IO.mapRequired("iextdefsym", LoadCommand.iextdefsym);
293   IO.mapRequired("nextdefsym", LoadCommand.nextdefsym);
294   IO.mapRequired("iundefsym", LoadCommand.iundefsym);
295   IO.mapRequired("nundefsym", LoadCommand.nundefsym);
296   IO.mapRequired("tocoff", LoadCommand.tocoff);
297   IO.mapRequired("ntoc", LoadCommand.ntoc);
298   IO.mapRequired("modtaboff", LoadCommand.modtaboff);
299   IO.mapRequired("nmodtab", LoadCommand.nmodtab);
300   IO.mapRequired("extrefsymoff", LoadCommand.extrefsymoff);
301   IO.mapRequired("nextrefsyms", LoadCommand.nextrefsyms);
302   IO.mapRequired("indirectsymoff", LoadCommand.indirectsymoff);
303   IO.mapRequired("nindirectsyms", LoadCommand.nindirectsyms);
304   IO.mapRequired("extreloff", LoadCommand.extreloff);
305   IO.mapRequired("nextrel", LoadCommand.nextrel);
306   IO.mapRequired("locreloff", LoadCommand.locreloff);
307   IO.mapRequired("nlocrel", LoadCommand.nlocrel);
308 }
309 
310 void MappingTraits<MachO::encryption_info_command>::mapping(
311     IO &IO, MachO::encryption_info_command &LoadCommand) {
312 
313   IO.mapRequired("cryptoff", LoadCommand.cryptoff);
314   IO.mapRequired("cryptsize", LoadCommand.cryptsize);
315   IO.mapRequired("cryptid", LoadCommand.cryptid);
316 }
317 
318 void MappingTraits<MachO::encryption_info_command_64>::mapping(
319     IO &IO, MachO::encryption_info_command_64 &LoadCommand) {
320 
321   IO.mapRequired("cryptoff", LoadCommand.cryptoff);
322   IO.mapRequired("cryptsize", LoadCommand.cryptsize);
323   IO.mapRequired("cryptid", LoadCommand.cryptid);
324   IO.mapRequired("pad", LoadCommand.pad);
325 }
326 
327 void MappingTraits<MachO::entry_point_command>::mapping(
328     IO &IO, MachO::entry_point_command &LoadCommand) {
329 
330   IO.mapRequired("entryoff", LoadCommand.entryoff);
331   IO.mapRequired("stacksize", LoadCommand.stacksize);
332 }
333 
334 void MappingTraits<MachO::fvmfile_command>::mapping(
335     IO &IO, MachO::fvmfile_command &LoadCommand) {
336 
337   IO.mapRequired("name", LoadCommand.name);
338   IO.mapRequired("header_addr", LoadCommand.header_addr);
339 }
340 
341 void MappingTraits<MachO::fvmlib>::mapping(IO &IO, MachO::fvmlib &FVMLib) {
342   IO.mapRequired("name", FVMLib.name);
343   IO.mapRequired("minor_version", FVMLib.minor_version);
344   IO.mapRequired("header_addr", FVMLib.header_addr);
345 }
346 
347 void MappingTraits<MachO::fvmlib_command>::mapping(
348     IO &IO, MachO::fvmlib_command &LoadCommand) {
349 
350   IO.mapRequired("fvmlib", LoadCommand.fvmlib);
351 }
352 
353 void MappingTraits<MachO::ident_command>::mapping(
354     IO &IO, MachO::ident_command &LoadCommand) {}
355 
356 void MappingTraits<MachO::linkedit_data_command>::mapping(
357     IO &IO, MachO::linkedit_data_command &LoadCommand) {
358 
359   IO.mapRequired("dataoff", LoadCommand.dataoff);
360   IO.mapRequired("datasize", LoadCommand.datasize);
361 }
362 
363 void MappingTraits<MachO::linker_option_command>::mapping(
364     IO &IO, MachO::linker_option_command &LoadCommand) {
365 
366   IO.mapRequired("count", LoadCommand.count);
367 }
368 
369 void MappingTraits<MachO::prebind_cksum_command>::mapping(
370     IO &IO, MachO::prebind_cksum_command &LoadCommand) {
371 
372   IO.mapRequired("cksum", LoadCommand.cksum);
373 }
374 
375 void MappingTraits<MachO::load_command>::mapping(
376     IO &IO, MachO::load_command &LoadCommand) {}
377 
378 void MappingTraits<MachO::prebound_dylib_command>::mapping(
379     IO &IO, MachO::prebound_dylib_command &LoadCommand) {
380 
381   IO.mapRequired("name", LoadCommand.name);
382   IO.mapRequired("nmodules", LoadCommand.nmodules);
383   IO.mapRequired("linked_modules", LoadCommand.linked_modules);
384 }
385 
386 void MappingTraits<MachO::routines_command>::mapping(
387     IO &IO, MachO::routines_command &LoadCommand) {
388 
389   IO.mapRequired("init_address", LoadCommand.init_address);
390   IO.mapRequired("init_module", LoadCommand.init_module);
391   IO.mapRequired("reserved1", LoadCommand.reserved1);
392   IO.mapRequired("reserved2", LoadCommand.reserved2);
393   IO.mapRequired("reserved3", LoadCommand.reserved3);
394   IO.mapRequired("reserved4", LoadCommand.reserved4);
395   IO.mapRequired("reserved5", LoadCommand.reserved5);
396   IO.mapRequired("reserved6", LoadCommand.reserved6);
397 }
398 
399 void MappingTraits<MachO::routines_command_64>::mapping(
400     IO &IO, MachO::routines_command_64 &LoadCommand) {
401 
402   IO.mapRequired("init_address", LoadCommand.init_address);
403   IO.mapRequired("init_module", LoadCommand.init_module);
404   IO.mapRequired("reserved1", LoadCommand.reserved1);
405   IO.mapRequired("reserved2", LoadCommand.reserved2);
406   IO.mapRequired("reserved3", LoadCommand.reserved3);
407   IO.mapRequired("reserved4", LoadCommand.reserved4);
408   IO.mapRequired("reserved5", LoadCommand.reserved5);
409   IO.mapRequired("reserved6", LoadCommand.reserved6);
410 }
411 
412 void MappingTraits<MachO::rpath_command>::mapping(
413     IO &IO, MachO::rpath_command &LoadCommand) {
414 
415   IO.mapRequired("path", LoadCommand.path);
416 }
417 
418 void MappingTraits<MachO::section>::mapping(IO &IO, MachO::section &Section) {
419   IO.mapRequired("sectname", Section.sectname);
420   IO.mapRequired("segname", Section.segname);
421   IO.mapRequired("addr", Section.addr);
422   IO.mapRequired("size", Section.size);
423   IO.mapRequired("offset", Section.offset);
424   IO.mapRequired("align", Section.align);
425   IO.mapRequired("reloff", Section.reloff);
426   IO.mapRequired("nreloc", Section.nreloc);
427   IO.mapRequired("flags", Section.flags);
428   IO.mapRequired("reserved1", Section.reserved1);
429   IO.mapRequired("reserved2", Section.reserved2);
430 }
431 
432 void MappingTraits<MachO::section_64>::mapping(IO &IO,
433                                                MachO::section_64 &Section) {
434   IO.mapRequired("sectname", Section.sectname);
435   IO.mapRequired("segname", Section.segname);
436   IO.mapRequired("addr", Section.addr);
437   IO.mapRequired("size", Section.size);
438   IO.mapRequired("offset", Section.offset);
439   IO.mapRequired("align", Section.align);
440   IO.mapRequired("reloff", Section.reloff);
441   IO.mapRequired("nreloc", Section.nreloc);
442   IO.mapRequired("flags", Section.flags);
443   IO.mapRequired("reserved1", Section.reserved1);
444   IO.mapRequired("reserved2", Section.reserved2);
445   IO.mapRequired("reserved3", Section.reserved3);
446 }
447 
448 void MappingTraits<MachO::segment_command>::mapping(
449     IO &IO, MachO::segment_command &LoadCommand) {
450 
451   IO.mapRequired("segname", LoadCommand.segname);
452   IO.mapRequired("vmaddr", LoadCommand.vmaddr);
453   IO.mapRequired("vmsize", LoadCommand.vmsize);
454   IO.mapRequired("fileoff", LoadCommand.fileoff);
455   IO.mapRequired("filesize", LoadCommand.filesize);
456   IO.mapRequired("maxprot", LoadCommand.maxprot);
457   IO.mapRequired("initprot", LoadCommand.initprot);
458   IO.mapRequired("nsects", LoadCommand.nsects);
459   IO.mapRequired("flags", LoadCommand.flags);
460 }
461 
462 void MappingTraits<MachO::segment_command_64>::mapping(
463     IO &IO, MachO::segment_command_64 &LoadCommand) {
464 
465   IO.mapRequired("segname", LoadCommand.segname);
466   IO.mapRequired("vmaddr", LoadCommand.vmaddr);
467   IO.mapRequired("vmsize", LoadCommand.vmsize);
468   IO.mapRequired("fileoff", LoadCommand.fileoff);
469   IO.mapRequired("filesize", LoadCommand.filesize);
470   IO.mapRequired("maxprot", LoadCommand.maxprot);
471   IO.mapRequired("initprot", LoadCommand.initprot);
472   IO.mapRequired("nsects", LoadCommand.nsects);
473   IO.mapRequired("flags", LoadCommand.flags);
474 }
475 
476 void MappingTraits<MachO::source_version_command>::mapping(
477     IO &IO, MachO::source_version_command &LoadCommand) {
478 
479   IO.mapRequired("version", LoadCommand.version);
480 }
481 
482 void MappingTraits<MachO::sub_client_command>::mapping(
483     IO &IO, MachO::sub_client_command &LoadCommand) {
484 
485   IO.mapRequired("client", LoadCommand.client);
486 }
487 
488 void MappingTraits<MachO::sub_framework_command>::mapping(
489     IO &IO, MachO::sub_framework_command &LoadCommand) {
490 
491   IO.mapRequired("umbrella", LoadCommand.umbrella);
492 }
493 
494 void MappingTraits<MachO::sub_library_command>::mapping(
495     IO &IO, MachO::sub_library_command &LoadCommand) {
496 
497   IO.mapRequired("sub_library", LoadCommand.sub_library);
498 }
499 
500 void MappingTraits<MachO::sub_umbrella_command>::mapping(
501     IO &IO, MachO::sub_umbrella_command &LoadCommand) {
502 
503   IO.mapRequired("sub_umbrella", LoadCommand.sub_umbrella);
504 }
505 
506 void MappingTraits<MachO::symseg_command>::mapping(
507     IO &IO, MachO::symseg_command &LoadCommand) {
508 
509   IO.mapRequired("offset", LoadCommand.offset);
510   IO.mapRequired("size", LoadCommand.size);
511 }
512 
513 void MappingTraits<MachO::symtab_command>::mapping(
514     IO &IO, MachO::symtab_command &LoadCommand) {
515 
516   IO.mapRequired("symoff", LoadCommand.symoff);
517   IO.mapRequired("nsyms", LoadCommand.nsyms);
518   IO.mapRequired("stroff", LoadCommand.stroff);
519   IO.mapRequired("strsize", LoadCommand.strsize);
520 }
521 
522 void MappingTraits<MachO::thread_command>::mapping(
523     IO &IO, MachO::thread_command &LoadCommand) {}
524 
525 void MappingTraits<MachO::twolevel_hints_command>::mapping(
526     IO &IO, MachO::twolevel_hints_command &LoadCommand) {
527 
528   IO.mapRequired("offset", LoadCommand.offset);
529   IO.mapRequired("nhints", LoadCommand.nhints);
530 }
531 
532 void MappingTraits<MachO::uuid_command>::mapping(
533     IO &IO, MachO::uuid_command &LoadCommand) {
534 
535   IO.mapRequired("uuid", LoadCommand.uuid);
536 }
537 
538 void MappingTraits<MachO::version_min_command>::mapping(
539     IO &IO, MachO::version_min_command &LoadCommand) {
540 
541   IO.mapRequired("version", LoadCommand.version);
542   IO.mapRequired("sdk", LoadCommand.sdk);
543 }
544 
545 } // namespace llvm::yaml
546 
547 } // namespace llvm
548