LLVM  14.0.0git
MachOYAML.cpp
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1 //===- MachOYAML.cpp - MachO YAMLIO implementation ------------------------===//
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 classes for handling the YAML representation of MachO.
10 //
11 //===----------------------------------------------------------------------===//
12 
14 #include "llvm/ADT/StringRef.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/Support/Host.h"
20 #include <cinttypes>
21 #include <cstdint>
22 #include <cstring>
23 
24 namespace llvm {
25 
27 
29  return 0 ==
30  RebaseOpcodes.size() + BindOpcodes.size() + WeakBindOpcodes.size() +
31  LazyBindOpcodes.size() + ExportTrie.Children.size() +
32  NameList.size() + StringTable.size();
33 }
34 
35 namespace yaml {
36 
37 void ScalarTraits<char_16>::output(const char_16 &Val, void *,
38  raw_ostream &Out) {
39  auto Len = strnlen(&Val[0], 16);
40  Out << StringRef(&Val[0], Len);
41 }
42 
44  size_t CopySize = 16 >= Scalar.size() ? 16 : Scalar.size();
45  memcpy((void *)Val, Scalar.data(), CopySize);
46 
47  if (Scalar.size() < 16) {
48  memset((void *)&Val[Scalar.size()], 0, 16 - Scalar.size());
49  }
50 
51  return StringRef();
52 }
53 
54 QuotingType ScalarTraits<char_16>::mustQuote(StringRef S) {
55  return needsQuotes(S);
56 }
57 
58 void ScalarTraits<uuid_t>::output(const uuid_t &Val, void *, raw_ostream &Out) {
59  Out.write_uuid(Val);
60 }
61 
63  size_t OutIdx = 0;
64  for (size_t Idx = 0; Idx < Scalar.size(); ++Idx) {
65  if (Scalar[Idx] == '-' || OutIdx >= 16)
66  continue;
67  unsigned long long TempInt;
68  if (getAsUnsignedInteger(Scalar.slice(Idx, Idx + 2), 16, TempInt))
69  return "invalid number";
70  if (TempInt > 0xFF)
71  return "out of range number";
72  Val[OutIdx] = static_cast<uint8_t>(TempInt);
73  ++Idx; // increment idx an extra time because we're consuming 2 chars
74  ++OutIdx;
75  }
76  return StringRef();
77 }
78 
79 QuotingType ScalarTraits<uuid_t>::mustQuote(StringRef S) {
80  return needsQuotes(S);
81 }
82 
84  IO &IO, MachOYAML::FileHeader &FileHdr) {
85  IO.mapRequired("magic", FileHdr.magic);
86  IO.mapRequired("cputype", FileHdr.cputype);
87  IO.mapRequired("cpusubtype", FileHdr.cpusubtype);
88  IO.mapRequired("filetype", FileHdr.filetype);
89  IO.mapRequired("ncmds", FileHdr.ncmds);
90  IO.mapRequired("sizeofcmds", FileHdr.sizeofcmds);
91  IO.mapRequired("flags", FileHdr.flags);
92  if (FileHdr.magic == MachO::MH_MAGIC_64 ||
93  FileHdr.magic == MachO::MH_CIGAM_64)
94  IO.mapRequired("reserved", FileHdr.reserved);
95 }
96 
98  MachOYAML::Object &Object) {
99  // If the context isn't already set, tag the document as !mach-o.
100  // For Fat files there will be a different tag so they can be differentiated.
101  if (!IO.getContext()) {
102  IO.setContext(&Object);
103  }
104  IO.mapTag("!mach-o", true);
105  IO.mapOptional("IsLittleEndian", Object.IsLittleEndian,
107  Object.DWARF.IsLittleEndian = Object.IsLittleEndian;
108 
109  IO.mapRequired("FileHeader", Object.Header);
110  Object.DWARF.Is64BitAddrSize = Object.Header.magic == MachO::MH_MAGIC_64 ||
111  Object.Header.magic == MachO::MH_CIGAM_64;
112  IO.mapOptional("LoadCommands", Object.LoadCommands);
113  if(!Object.LinkEdit.isEmpty() || !IO.outputting())
114  IO.mapOptional("LinkEditData", Object.LinkEdit);
115 
116  if(!Object.DWARF.isEmpty() || !IO.outputting())
117  IO.mapOptional("DWARF", Object.DWARF);
118 
119  if (IO.getContext() == &Object)
120  IO.setContext(nullptr);
121 }
122 
124  IO &IO, MachOYAML::FatHeader &FatHeader) {
125  IO.mapRequired("magic", FatHeader.magic);
126  IO.mapRequired("nfat_arch", FatHeader.nfat_arch);
127 }
128 
130  MachOYAML::FatArch &FatArch) {
131  IO.mapRequired("cputype", FatArch.cputype);
132  IO.mapRequired("cpusubtype", FatArch.cpusubtype);
133  IO.mapRequired("offset", FatArch.offset);
134  IO.mapRequired("size", FatArch.size);
135  IO.mapRequired("align", FatArch.align);
136  IO.mapOptional("reserved", FatArch.reserved,
137  static_cast<llvm::yaml::Hex32>(0));
138 }
139 
141  IO &IO, MachOYAML::UniversalBinary &UniversalBinary) {
142  if (!IO.getContext()) {
143  IO.setContext(&UniversalBinary);
144  IO.mapTag("!fat-mach-o", true);
145  }
146  IO.mapRequired("FatHeader", UniversalBinary.Header);
147  IO.mapRequired("FatArchs", UniversalBinary.FatArchs);
148  IO.mapRequired("Slices", UniversalBinary.Slices);
149 
150  if (IO.getContext() == &UniversalBinary)
151  IO.setContext(nullptr);
152 }
153 
155  IO &IO, MachOYAML::LinkEditData &LinkEditData) {
156  IO.mapOptional("RebaseOpcodes", LinkEditData.RebaseOpcodes);
157  IO.mapOptional("BindOpcodes", LinkEditData.BindOpcodes);
158  IO.mapOptional("WeakBindOpcodes", LinkEditData.WeakBindOpcodes);
159  IO.mapOptional("LazyBindOpcodes", LinkEditData.LazyBindOpcodes);
160  if (!LinkEditData.ExportTrie.Children.empty() || !IO.outputting())
161  IO.mapOptional("ExportTrie", LinkEditData.ExportTrie);
162  IO.mapOptional("NameList", LinkEditData.NameList);
163  IO.mapOptional("StringTable", LinkEditData.StringTable);
164 }
165 
168  IO.mapRequired("Opcode", RebaseOpcode.Opcode);
169  IO.mapRequired("Imm", RebaseOpcode.Imm);
170  IO.mapOptional("ExtraData", RebaseOpcode.ExtraData);
171 }
172 
175  IO.mapRequired("Opcode", BindOpcode.Opcode);
176  IO.mapRequired("Imm", BindOpcode.Imm);
177  IO.mapOptional("ULEBExtraData", BindOpcode.ULEBExtraData);
178  IO.mapOptional("SLEBExtraData", BindOpcode.SLEBExtraData);
179  IO.mapOptional("Symbol", BindOpcode.Symbol);
180 }
181 
183  IO &IO, MachOYAML::ExportEntry &ExportEntry) {
184  IO.mapRequired("TerminalSize", ExportEntry.TerminalSize);
185  IO.mapOptional("NodeOffset", ExportEntry.NodeOffset);
186  IO.mapOptional("Name", ExportEntry.Name);
187  IO.mapOptional("Flags", ExportEntry.Flags);
188  IO.mapOptional("Address", ExportEntry.Address);
189  IO.mapOptional("Other", ExportEntry.Other);
190  IO.mapOptional("ImportName", ExportEntry.ImportName);
191  IO.mapOptional("Children", ExportEntry.Children);
192 }
193 
195  IO &IO, MachOYAML::NListEntry &NListEntry) {
196  IO.mapRequired("n_strx", NListEntry.n_strx);
197  IO.mapRequired("n_type", NListEntry.n_type);
198  IO.mapRequired("n_sect", NListEntry.n_sect);
199  IO.mapRequired("n_desc", NListEntry.n_desc);
200  IO.mapRequired("n_value", NListEntry.n_value);
201 }
202 
203 template <typename StructType>
204 void mapLoadCommandData(IO &IO, MachOYAML::LoadCommand &LoadCommand) {}
205 
206 template <>
207 void mapLoadCommandData<MachO::segment_command>(
208  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
209  IO.mapOptional("Sections", LoadCommand.Sections);
210 }
211 
212 template <>
213 void mapLoadCommandData<MachO::segment_command_64>(
214  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
215  IO.mapOptional("Sections", LoadCommand.Sections);
216 }
217 
218 template <>
219 void mapLoadCommandData<MachO::dylib_command>(
220  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
221  IO.mapOptional("Content", LoadCommand.Content);
222 }
223 
224 template <>
225 void mapLoadCommandData<MachO::rpath_command>(
226  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
227  IO.mapOptional("Content", LoadCommand.Content);
228 }
229 
230 template <>
231 void mapLoadCommandData<MachO::dylinker_command>(
232  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
233  IO.mapOptional("Content", LoadCommand.Content);
234 }
235 
236 template <>
237 void mapLoadCommandData<MachO::sub_framework_command>(
238  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
239  IO.mapOptional("Content", LoadCommand.Content);
240 }
241 
242 template <>
243 void mapLoadCommandData<MachO::sub_umbrella_command>(
244  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
245  IO.mapOptional("Content", LoadCommand.Content);
246 }
247 
248 template <>
249 void mapLoadCommandData<MachO::sub_client_command>(
250  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
251  IO.mapOptional("Content", LoadCommand.Content);
252 }
253 
254 template <>
255 void mapLoadCommandData<MachO::sub_library_command>(
256  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
257  IO.mapOptional("Content", LoadCommand.Content);
258 }
259 
260 template <>
261 void mapLoadCommandData<MachO::build_version_command>(
262  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
263  IO.mapOptional("Tools", LoadCommand.Tools);
264 }
265 
267  IO &IO, MachOYAML::LoadCommand &LoadCommand) {
268  MachO::LoadCommandType TempCmd = static_cast<MachO::LoadCommandType>(
269  LoadCommand.Data.load_command_data.cmd);
270  IO.mapRequired("cmd", TempCmd);
271  LoadCommand.Data.load_command_data.cmd = TempCmd;
272  IO.mapRequired("cmdsize", LoadCommand.Data.load_command_data.cmdsize);
273 
274 #define HANDLE_LOAD_COMMAND(LCName, LCValue, LCStruct) \
275  case MachO::LCName: \
276  MappingTraits<MachO::LCStruct>::mapping(IO, \
277  LoadCommand.Data.LCStruct##_data); \
278  mapLoadCommandData<MachO::LCStruct>(IO, LoadCommand); \
279  break;
280 
281  switch (LoadCommand.Data.load_command_data.cmd) {
282 #include "llvm/BinaryFormat/MachO.def"
283  }
284  IO.mapOptional("PayloadBytes", LoadCommand.PayloadBytes);
285  IO.mapOptional("ZeroPadBytes", LoadCommand.ZeroPadBytes, (uint64_t)0ull);
286 }
287 
289  IO &IO, MachO::dyld_info_command &LoadCommand) {
290  IO.mapRequired("rebase_off", LoadCommand.rebase_off);
291  IO.mapRequired("rebase_size", LoadCommand.rebase_size);
292  IO.mapRequired("bind_off", LoadCommand.bind_off);
293  IO.mapRequired("bind_size", LoadCommand.bind_size);
294  IO.mapRequired("weak_bind_off", LoadCommand.weak_bind_off);
295  IO.mapRequired("weak_bind_size", LoadCommand.weak_bind_size);
296  IO.mapRequired("lazy_bind_off", LoadCommand.lazy_bind_off);
297  IO.mapRequired("lazy_bind_size", LoadCommand.lazy_bind_size);
298  IO.mapRequired("export_off", LoadCommand.export_off);
299  IO.mapRequired("export_size", LoadCommand.export_size);
300 }
301 
303  IO &IO, MachOYAML::Relocation &Relocation) {
304  IO.mapRequired("address", Relocation.address);
305  IO.mapRequired("symbolnum", Relocation.symbolnum);
306  IO.mapRequired("pcrel", Relocation.is_pcrel);
307  IO.mapRequired("length", Relocation.length);
308  IO.mapRequired("extern", Relocation.is_extern);
309  IO.mapRequired("type", Relocation.type);
310  IO.mapRequired("scattered", Relocation.is_scattered);
311  IO.mapRequired("value", Relocation.value);
312 }
313 
316  IO.mapRequired("sectname", Section.sectname);
317  IO.mapRequired("segname", Section.segname);
318  IO.mapRequired("addr", Section.addr);
319  IO.mapRequired("size", Section.size);
320  IO.mapRequired("offset", Section.offset);
321  IO.mapRequired("align", Section.align);
322  IO.mapRequired("reloff", Section.reloff);
323  IO.mapRequired("nreloc", Section.nreloc);
324  IO.mapRequired("flags", Section.flags);
325  IO.mapRequired("reserved1", Section.reserved1);
326  IO.mapRequired("reserved2", Section.reserved2);
327  IO.mapOptional("reserved3", Section.reserved3);
328  IO.mapOptional("content", Section.content);
329  IO.mapOptional("relocations", Section.relocations);
330 }
331 
332 std::string
335  if (Section.content && Section.size < Section.content->binary_size())
336  return "Section size must be greater than or equal to the content size";
337  return "";
338 }
339 
341  IO &IO, MachO::build_tool_version &tool) {
342  IO.mapRequired("tool", tool.tool);
343  IO.mapRequired("version", tool.version);
344 }
345 
347  IO.mapRequired("name", DylibStruct.name);
348  IO.mapRequired("timestamp", DylibStruct.timestamp);
349  IO.mapRequired("current_version", DylibStruct.current_version);
350  IO.mapRequired("compatibility_version", DylibStruct.compatibility_version);
351 }
352 
354  IO &IO, MachO::dylib_command &LoadCommand) {
355  IO.mapRequired("dylib", LoadCommand.dylib);
356 }
357 
358 void MappingTraits<MachO::dylinker_command>::mapping(
359  IO &IO, MachO::dylinker_command &LoadCommand) {
360  IO.mapRequired("name", LoadCommand.name);
361 }
362 
363 void MappingTraits<MachO::dysymtab_command>::mapping(
364  IO &IO, MachO::dysymtab_command &LoadCommand) {
365  IO.mapRequired("ilocalsym", LoadCommand.ilocalsym);
366  IO.mapRequired("nlocalsym", LoadCommand.nlocalsym);
367  IO.mapRequired("iextdefsym", LoadCommand.iextdefsym);
368  IO.mapRequired("nextdefsym", LoadCommand.nextdefsym);
369  IO.mapRequired("iundefsym", LoadCommand.iundefsym);
370  IO.mapRequired("nundefsym", LoadCommand.nundefsym);
371  IO.mapRequired("tocoff", LoadCommand.tocoff);
372  IO.mapRequired("ntoc", LoadCommand.ntoc);
373  IO.mapRequired("modtaboff", LoadCommand.modtaboff);
374  IO.mapRequired("nmodtab", LoadCommand.nmodtab);
375  IO.mapRequired("extrefsymoff", LoadCommand.extrefsymoff);
376  IO.mapRequired("nextrefsyms", LoadCommand.nextrefsyms);
377  IO.mapRequired("indirectsymoff", LoadCommand.indirectsymoff);
378  IO.mapRequired("nindirectsyms", LoadCommand.nindirectsyms);
379  IO.mapRequired("extreloff", LoadCommand.extreloff);
380  IO.mapRequired("nextrel", LoadCommand.nextrel);
381  IO.mapRequired("locreloff", LoadCommand.locreloff);
382  IO.mapRequired("nlocrel", LoadCommand.nlocrel);
383 }
384 
385 void MappingTraits<MachO::encryption_info_command>::mapping(
386  IO &IO, MachO::encryption_info_command &LoadCommand) {
387  IO.mapRequired("cryptoff", LoadCommand.cryptoff);
388  IO.mapRequired("cryptsize", LoadCommand.cryptsize);
389  IO.mapRequired("cryptid", LoadCommand.cryptid);
390 }
391 
392 void MappingTraits<MachO::encryption_info_command_64>::mapping(
393  IO &IO, MachO::encryption_info_command_64 &LoadCommand) {
394  IO.mapRequired("cryptoff", LoadCommand.cryptoff);
395  IO.mapRequired("cryptsize", LoadCommand.cryptsize);
396  IO.mapRequired("cryptid", LoadCommand.cryptid);
397  IO.mapRequired("pad", LoadCommand.pad);
398 }
399 
400 void MappingTraits<MachO::entry_point_command>::mapping(
401  IO &IO, MachO::entry_point_command &LoadCommand) {
402  IO.mapRequired("entryoff", LoadCommand.entryoff);
403  IO.mapRequired("stacksize", LoadCommand.stacksize);
404 }
405 
406 void MappingTraits<MachO::fvmfile_command>::mapping(
407  IO &IO, MachO::fvmfile_command &LoadCommand) {
408  IO.mapRequired("name", LoadCommand.name);
409  IO.mapRequired("header_addr", LoadCommand.header_addr);
410 }
411 
413  IO.mapRequired("name", FVMLib.name);
414  IO.mapRequired("minor_version", FVMLib.minor_version);
415  IO.mapRequired("header_addr", FVMLib.header_addr);
416 }
417 
419  IO &IO, MachO::fvmlib_command &LoadCommand) {
420  IO.mapRequired("fvmlib", LoadCommand.fvmlib);
421 }
422 
423 void MappingTraits<MachO::ident_command>::mapping(
424  IO &IO, MachO::ident_command &LoadCommand) {}
425 
426 void MappingTraits<MachO::linkedit_data_command>::mapping(
427  IO &IO, MachO::linkedit_data_command &LoadCommand) {
428  IO.mapRequired("dataoff", LoadCommand.dataoff);
429  IO.mapRequired("datasize", LoadCommand.datasize);
430 }
431 
432 void MappingTraits<MachO::linker_option_command>::mapping(
433  IO &IO, MachO::linker_option_command &LoadCommand) {
434  IO.mapRequired("count", LoadCommand.count);
435 }
436 
437 void MappingTraits<MachO::prebind_cksum_command>::mapping(
438  IO &IO, MachO::prebind_cksum_command &LoadCommand) {
439  IO.mapRequired("cksum", LoadCommand.cksum);
440 }
441 
442 void MappingTraits<MachO::load_command>::mapping(
443  IO &IO, MachO::load_command &LoadCommand) {}
444 
445 void MappingTraits<MachO::prebound_dylib_command>::mapping(
446  IO &IO, MachO::prebound_dylib_command &LoadCommand) {
447  IO.mapRequired("name", LoadCommand.name);
448  IO.mapRequired("nmodules", LoadCommand.nmodules);
449  IO.mapRequired("linked_modules", LoadCommand.linked_modules);
450 }
451 
452 void MappingTraits<MachO::routines_command>::mapping(
453  IO &IO, MachO::routines_command &LoadCommand) {
454  IO.mapRequired("init_address", LoadCommand.init_address);
455  IO.mapRequired("init_module", LoadCommand.init_module);
456  IO.mapRequired("reserved1", LoadCommand.reserved1);
457  IO.mapRequired("reserved2", LoadCommand.reserved2);
458  IO.mapRequired("reserved3", LoadCommand.reserved3);
459  IO.mapRequired("reserved4", LoadCommand.reserved4);
460  IO.mapRequired("reserved5", LoadCommand.reserved5);
461  IO.mapRequired("reserved6", LoadCommand.reserved6);
462 }
463 
464 void MappingTraits<MachO::routines_command_64>::mapping(
465  IO &IO, MachO::routines_command_64 &LoadCommand) {
466  IO.mapRequired("init_address", LoadCommand.init_address);
467  IO.mapRequired("init_module", LoadCommand.init_module);
468  IO.mapRequired("reserved1", LoadCommand.reserved1);
469  IO.mapRequired("reserved2", LoadCommand.reserved2);
470  IO.mapRequired("reserved3", LoadCommand.reserved3);
471  IO.mapRequired("reserved4", LoadCommand.reserved4);
472  IO.mapRequired("reserved5", LoadCommand.reserved5);
473  IO.mapRequired("reserved6", LoadCommand.reserved6);
474 }
475 
476 void MappingTraits<MachO::rpath_command>::mapping(
477  IO &IO, MachO::rpath_command &LoadCommand) {
478  IO.mapRequired("path", LoadCommand.path);
479 }
480 
482  IO.mapRequired("sectname", Section.sectname);
483  IO.mapRequired("segname", Section.segname);
484  IO.mapRequired("addr", Section.addr);
485  IO.mapRequired("size", Section.size);
486  IO.mapRequired("offset", Section.offset);
487  IO.mapRequired("align", Section.align);
488  IO.mapRequired("reloff", Section.reloff);
489  IO.mapRequired("nreloc", Section.nreloc);
490  IO.mapRequired("flags", Section.flags);
491  IO.mapRequired("reserved1", Section.reserved1);
492  IO.mapRequired("reserved2", Section.reserved2);
493 }
494 
497  IO.mapRequired("sectname", Section.sectname);
498  IO.mapRequired("segname", Section.segname);
499  IO.mapRequired("addr", Section.addr);
500  IO.mapRequired("size", Section.size);
501  IO.mapRequired("offset", Section.offset);
502  IO.mapRequired("align", Section.align);
503  IO.mapRequired("reloff", Section.reloff);
504  IO.mapRequired("nreloc", Section.nreloc);
505  IO.mapRequired("flags", Section.flags);
506  IO.mapRequired("reserved1", Section.reserved1);
507  IO.mapRequired("reserved2", Section.reserved2);
508  IO.mapRequired("reserved3", Section.reserved3);
509 }
510 
512  IO &IO, MachO::segment_command &LoadCommand) {
513  IO.mapRequired("segname", LoadCommand.segname);
514  IO.mapRequired("vmaddr", LoadCommand.vmaddr);
515  IO.mapRequired("vmsize", LoadCommand.vmsize);
516  IO.mapRequired("fileoff", LoadCommand.fileoff);
517  IO.mapRequired("filesize", LoadCommand.filesize);
518  IO.mapRequired("maxprot", LoadCommand.maxprot);
519  IO.mapRequired("initprot", LoadCommand.initprot);
520  IO.mapRequired("nsects", LoadCommand.nsects);
521  IO.mapRequired("flags", LoadCommand.flags);
522 }
523 
524 void MappingTraits<MachO::segment_command_64>::mapping(
525  IO &IO, MachO::segment_command_64 &LoadCommand) {
526  IO.mapRequired("segname", LoadCommand.segname);
527  IO.mapRequired("vmaddr", LoadCommand.vmaddr);
528  IO.mapRequired("vmsize", LoadCommand.vmsize);
529  IO.mapRequired("fileoff", LoadCommand.fileoff);
530  IO.mapRequired("filesize", LoadCommand.filesize);
531  IO.mapRequired("maxprot", LoadCommand.maxprot);
532  IO.mapRequired("initprot", LoadCommand.initprot);
533  IO.mapRequired("nsects", LoadCommand.nsects);
534  IO.mapRequired("flags", LoadCommand.flags);
535 }
536 
537 void MappingTraits<MachO::source_version_command>::mapping(
538  IO &IO, MachO::source_version_command &LoadCommand) {
539  IO.mapRequired("version", LoadCommand.version);
540 }
541 
542 void MappingTraits<MachO::sub_client_command>::mapping(
543  IO &IO, MachO::sub_client_command &LoadCommand) {
544  IO.mapRequired("client", LoadCommand.client);
545 }
546 
547 void MappingTraits<MachO::sub_framework_command>::mapping(
548  IO &IO, MachO::sub_framework_command &LoadCommand) {
549  IO.mapRequired("umbrella", LoadCommand.umbrella);
550 }
551 
552 void MappingTraits<MachO::sub_library_command>::mapping(
553  IO &IO, MachO::sub_library_command &LoadCommand) {
554  IO.mapRequired("sub_library", LoadCommand.sub_library);
555 }
556 
557 void MappingTraits<MachO::sub_umbrella_command>::mapping(
558  IO &IO, MachO::sub_umbrella_command &LoadCommand) {
559  IO.mapRequired("sub_umbrella", LoadCommand.sub_umbrella);
560 }
561 
562 void MappingTraits<MachO::symseg_command>::mapping(
563  IO &IO, MachO::symseg_command &LoadCommand) {
564  IO.mapRequired("offset", LoadCommand.offset);
565  IO.mapRequired("size", LoadCommand.size);
566 }
567 
568 void MappingTraits<MachO::symtab_command>::mapping(
569  IO &IO, MachO::symtab_command &LoadCommand) {
570  IO.mapRequired("symoff", LoadCommand.symoff);
571  IO.mapRequired("nsyms", LoadCommand.nsyms);
572  IO.mapRequired("stroff", LoadCommand.stroff);
573  IO.mapRequired("strsize", LoadCommand.strsize);
574 }
575 
576 void MappingTraits<MachO::thread_command>::mapping(
577  IO &IO, MachO::thread_command &LoadCommand) {}
578 
579 void MappingTraits<MachO::twolevel_hints_command>::mapping(
580  IO &IO, MachO::twolevel_hints_command &LoadCommand) {
581  IO.mapRequired("offset", LoadCommand.offset);
582  IO.mapRequired("nhints", LoadCommand.nhints);
583 }
584 
585 void MappingTraits<MachO::uuid_command>::mapping(
586  IO &IO, MachO::uuid_command &LoadCommand) {
587  IO.mapRequired("uuid", LoadCommand.uuid);
588 }
589 
590 void MappingTraits<MachO::version_min_command>::mapping(
591  IO &IO, MachO::version_min_command &LoadCommand) {
592  IO.mapRequired("version", LoadCommand.version);
593  IO.mapRequired("sdk", LoadCommand.sdk);
594 }
595 
596 void MappingTraits<MachO::note_command>::mapping(
597  IO &IO, MachO::note_command &LoadCommand) {
598  IO.mapRequired("data_owner", LoadCommand.data_owner);
599  IO.mapRequired("offset", LoadCommand.offset);
600  IO.mapRequired("size", LoadCommand.size);
601 }
602 
603 void MappingTraits<MachO::build_version_command>::mapping(
604  IO &IO, MachO::build_version_command &LoadCommand) {
605  IO.mapRequired("platform", LoadCommand.platform);
606  IO.mapRequired("minos", LoadCommand.minos);
607  IO.mapRequired("sdk", LoadCommand.sdk);
608  IO.mapRequired("ntools", LoadCommand.ntools);
609 }
610 
611 } // end namespace yaml
612 
613 } // end namespace llvm
llvm::MachO::dylib
Definition: MachO.h:610
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---------------------— PointerInfo ------------------------------------—
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<%struct.s * > cast struct s *S to sbyte *< sbyte * > sbyte uint cast struct s *agg result to sbyte *< sbyte * > sbyte uint cast struct s *memtmp to sbyte *< sbyte * > sbyte uint ret void llc ends up issuing two memcpy or custom lower memcpy(of small size) to be ldmia/stmia. I think option 2 is better but the current register allocator cannot allocate a chunk of registers at a time. A feasible temporary solution is to use specific physical registers at the lowering time for small(<
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S
add sub stmia L5 ldr r0 bl L_printf $stub Instead of a and a wouldn t it be better to do three moves *Return an aggregate type is even return S
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