1 //===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
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 implements the MachO-specific dumper for llvm-readobj.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm-readobj.h"
15 #include "Error.h"
16 #include "ObjDumper.h"
17 #include "StreamWriter.h"
18 #include "llvm/ADT/SmallString.h"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/Object/MachO.h"
21 #include "llvm/Support/Casting.h"
22
23 using namespace llvm;
24 using namespace object;
25
26 namespace {
27
28 class MachODumper : public ObjDumper {
29 public:
MachODumper(const MachOObjectFile * Obj,StreamWriter & Writer)30 MachODumper(const MachOObjectFile *Obj, StreamWriter& Writer)
31 : ObjDumper(Writer)
32 , Obj(Obj) { }
33
34 void printFileHeaders() override;
35 void printSections() override;
36 void printRelocations() override;
37 void printSymbols() override;
38 void printDynamicSymbols() override;
39 void printUnwindInfo() override;
40
41 private:
42 template<class MachHeader>
43 void printFileHeaders(const MachHeader &Header);
44
45 void printSymbol(const SymbolRef &Symbol);
46
47 void printRelocation(const RelocationRef &Reloc);
48
49 void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc);
50
51 void printSections(const MachOObjectFile *Obj);
52
53 const MachOObjectFile *Obj;
54 };
55
56 } // namespace
57
58
59 namespace llvm {
60
createMachODumper(const object::ObjectFile * Obj,StreamWriter & Writer,std::unique_ptr<ObjDumper> & Result)61 std::error_code createMachODumper(const object::ObjectFile *Obj,
62 StreamWriter &Writer,
63 std::unique_ptr<ObjDumper> &Result) {
64 const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(Obj);
65 if (!MachOObj)
66 return readobj_error::unsupported_obj_file_format;
67
68 Result.reset(new MachODumper(MachOObj, Writer));
69 return readobj_error::success;
70 }
71
72 } // namespace llvm
73
74 static const EnumEntry<uint32_t> MachOMagics[] = {
75 { "Magic", MachO::MH_MAGIC },
76 { "Cigam", MachO::MH_CIGAM },
77 { "Magic64", MachO::MH_MAGIC_64 },
78 { "Cigam64", MachO::MH_CIGAM_64 },
79 { "FatMagic", MachO::FAT_MAGIC },
80 { "FatCigam", MachO::FAT_CIGAM },
81 };
82
83 static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
84 { "Relocatable", MachO::MH_OBJECT },
85 { "Executable", MachO::MH_EXECUTE },
86 { "FixedVMLibrary", MachO::MH_FVMLIB },
87 { "Core", MachO::MH_CORE },
88 { "PreloadedExecutable", MachO::MH_PRELOAD },
89 { "DynamicLibrary", MachO::MH_DYLIB },
90 { "DynamicLinker", MachO::MH_DYLINKER },
91 { "Bundle", MachO::MH_BUNDLE },
92 { "DynamicLibraryStub", MachO::MH_DYLIB_STUB },
93 { "DWARFSymbol", MachO::MH_DSYM },
94 { "KextBundle", MachO::MH_KEXT_BUNDLE },
95 };
96
97 static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
98 { "Any" , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
99 { "X86" , MachO::CPU_TYPE_X86 },
100 { "X86-64" , MachO::CPU_TYPE_X86_64 },
101 { "Mc98000" , MachO::CPU_TYPE_MC98000 },
102 { "Arm" , MachO::CPU_TYPE_ARM },
103 { "Arm64" , MachO::CPU_TYPE_ARM64 },
104 { "Sparc" , MachO::CPU_TYPE_SPARC },
105 { "PowerPC" , MachO::CPU_TYPE_POWERPC },
106 { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
107 };
108
109 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
110 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
111 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
112 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
113 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
114 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
115 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
116 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
117 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
118 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
119 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
120 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
121 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
122 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
123 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
124 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
125 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
126 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
127 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
128 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
129 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
130 };
131
132 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
133 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
134 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
135 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
136 };
137
138 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
139 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
140 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
141 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
142 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
143 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
144 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
145 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
146 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
147 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
148 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
149 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
150 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
151 };
152
153 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
154 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
155 };
156
157 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
158 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
159 };
160
161 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
162 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
163 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
164 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
165 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
166 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
167 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
168 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
169 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
170 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
171 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
172 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
173 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
174 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
175 };
176
177 static const EnumEntry<uint32_t> MachOHeaderFlags[] = {
178 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
179 LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
180 LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
181 LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
182 LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
183 LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
184 LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
185 LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
186 LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
187 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
188 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
189 LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
190 LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
191 LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
192 LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
193 LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
194 LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
195 LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
196 LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
197 LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
198 LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
199 LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
200 LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
201 LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
202 LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
203 LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
204 };
205
206 static const EnumEntry<unsigned> MachOSectionTypes[] = {
207 { "Regular" , 0x00 },
208 { "ZeroFill" , 0x01 },
209 { "CStringLiterals" , 0x02 },
210 { "4ByteLiterals" , 0x03 },
211 { "8ByteLiterals" , 0x04 },
212 { "LiteralPointers" , 0x05 },
213 { "NonLazySymbolPointers" , 0x06 },
214 { "LazySymbolPointers" , 0x07 },
215 { "SymbolStubs" , 0x08 },
216 { "ModInitFuncs" , 0x09 },
217 { "ModTermFuncs" , 0x0A },
218 { "Coalesced" , 0x0B },
219 { "GBZeroFill" , 0x0C },
220 { "Interposing" , 0x0D },
221 { "16ByteLiterals" , 0x0E },
222 { "DTraceDOF" , 0x0F },
223 { "LazyDylibSymbolPoints" , 0x10 },
224 { "ThreadLocalRegular" , 0x11 },
225 { "ThreadLocalZerofill" , 0x12 },
226 { "ThreadLocalVariables" , 0x13 },
227 { "ThreadLocalVariablePointers" , 0x14 },
228 { "ThreadLocalInitFunctionPointers", 0x15 }
229 };
230
231 static const EnumEntry<unsigned> MachOSectionAttributes[] = {
232 { "LocReloc" , 1 << 0 /*S_ATTR_LOC_RELOC */ },
233 { "ExtReloc" , 1 << 1 /*S_ATTR_EXT_RELOC */ },
234 { "SomeInstructions" , 1 << 2 /*S_ATTR_SOME_INSTRUCTIONS */ },
235 { "Debug" , 1 << 17 /*S_ATTR_DEBUG */ },
236 { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
237 { "LiveSupport" , 1 << 19 /*S_ATTR_LIVE_SUPPORT */ },
238 { "NoDeadStrip" , 1 << 20 /*S_ATTR_NO_DEAD_STRIP */ },
239 { "StripStaticSyms" , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS */ },
240 { "NoTOC" , 1 << 22 /*S_ATTR_NO_TOC */ },
241 { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS */ },
242 };
243
244 static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
245 { "UndefinedNonLazy", 0 },
246 { "ReferenceFlagUndefinedLazy", 1 },
247 { "ReferenceFlagDefined", 2 },
248 { "ReferenceFlagPrivateDefined", 3 },
249 { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
250 { "ReferenceFlagPrivateUndefinedLazy", 5 }
251 };
252
253 static const EnumEntry<unsigned> MachOSymbolFlags[] = {
254 { "ReferencedDynamically", 0x10 },
255 { "NoDeadStrip", 0x20 },
256 { "WeakRef", 0x40 },
257 { "WeakDef", 0x80 }
258 };
259
260 static const EnumEntry<unsigned> MachOSymbolTypes[] = {
261 { "Undef", 0x0 },
262 { "Abs", 0x2 },
263 { "Indirect", 0xA },
264 { "PreboundUndef", 0xC },
265 { "Section", 0xE }
266 };
267
268 namespace {
269 struct MachOSection {
270 ArrayRef<char> Name;
271 ArrayRef<char> SegmentName;
272 uint64_t Address;
273 uint64_t Size;
274 uint32_t Offset;
275 uint32_t Alignment;
276 uint32_t RelocationTableOffset;
277 uint32_t NumRelocationTableEntries;
278 uint32_t Flags;
279 uint32_t Reserved1;
280 uint32_t Reserved2;
281 };
282
283 struct MachOSymbol {
284 uint32_t StringIndex;
285 uint8_t Type;
286 uint8_t SectionIndex;
287 uint16_t Flags;
288 uint64_t Value;
289 };
290 }
291
getSection(const MachOObjectFile * Obj,DataRefImpl Sec,MachOSection & Section)292 static void getSection(const MachOObjectFile *Obj,
293 DataRefImpl Sec,
294 MachOSection &Section) {
295 if (!Obj->is64Bit()) {
296 MachO::section Sect = Obj->getSection(Sec);
297 Section.Address = Sect.addr;
298 Section.Size = Sect.size;
299 Section.Offset = Sect.offset;
300 Section.Alignment = Sect.align;
301 Section.RelocationTableOffset = Sect.reloff;
302 Section.NumRelocationTableEntries = Sect.nreloc;
303 Section.Flags = Sect.flags;
304 Section.Reserved1 = Sect.reserved1;
305 Section.Reserved2 = Sect.reserved2;
306 return;
307 }
308 MachO::section_64 Sect = Obj->getSection64(Sec);
309 Section.Address = Sect.addr;
310 Section.Size = Sect.size;
311 Section.Offset = Sect.offset;
312 Section.Alignment = Sect.align;
313 Section.RelocationTableOffset = Sect.reloff;
314 Section.NumRelocationTableEntries = Sect.nreloc;
315 Section.Flags = Sect.flags;
316 Section.Reserved1 = Sect.reserved1;
317 Section.Reserved2 = Sect.reserved2;
318 }
319
320
getSymbol(const MachOObjectFile * Obj,DataRefImpl DRI,MachOSymbol & Symbol)321 static void getSymbol(const MachOObjectFile *Obj,
322 DataRefImpl DRI,
323 MachOSymbol &Symbol) {
324 if (!Obj->is64Bit()) {
325 MachO::nlist Entry = Obj->getSymbolTableEntry(DRI);
326 Symbol.StringIndex = Entry.n_strx;
327 Symbol.Type = Entry.n_type;
328 Symbol.SectionIndex = Entry.n_sect;
329 Symbol.Flags = Entry.n_desc;
330 Symbol.Value = Entry.n_value;
331 return;
332 }
333 MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI);
334 Symbol.StringIndex = Entry.n_strx;
335 Symbol.Type = Entry.n_type;
336 Symbol.SectionIndex = Entry.n_sect;
337 Symbol.Flags = Entry.n_desc;
338 Symbol.Value = Entry.n_value;
339 }
340
printFileHeaders()341 void MachODumper::printFileHeaders() {
342 DictScope H(W, "MachHeader");
343 if (!Obj->is64Bit()) {
344 printFileHeaders(Obj->getHeader());
345 } else {
346 printFileHeaders(Obj->getHeader64());
347 W.printHex("Reserved", Obj->getHeader64().reserved);
348 }
349 }
350
351 template<class MachHeader>
printFileHeaders(const MachHeader & Header)352 void MachODumper::printFileHeaders(const MachHeader &Header) {
353 W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
354 W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
355 uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
356 switch (Header.cputype) {
357 case MachO::CPU_TYPE_X86:
358 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
359 break;
360 case MachO::CPU_TYPE_X86_64:
361 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
362 break;
363 case MachO::CPU_TYPE_ARM:
364 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
365 break;
366 case MachO::CPU_TYPE_POWERPC:
367 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
368 break;
369 case MachO::CPU_TYPE_SPARC:
370 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
371 break;
372 case MachO::CPU_TYPE_ARM64:
373 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
374 break;
375 case MachO::CPU_TYPE_POWERPC64:
376 default:
377 W.printHex("CpuSubtype", subtype);
378 }
379 W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
380 W.printNumber("NumOfLoadCommands", Header.ncmds);
381 W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
382 W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
383 }
384
printSections()385 void MachODumper::printSections() {
386 return printSections(Obj);
387 }
388
printSections(const MachOObjectFile * Obj)389 void MachODumper::printSections(const MachOObjectFile *Obj) {
390 ListScope Group(W, "Sections");
391
392 int SectionIndex = -1;
393 for (const SectionRef &Section : Obj->sections()) {
394 ++SectionIndex;
395
396 MachOSection MOSection;
397 getSection(Obj, Section.getRawDataRefImpl(), MOSection);
398 DataRefImpl DR = Section.getRawDataRefImpl();
399
400 StringRef Name;
401 if (error(Section.getName(Name)))
402 Name = "";
403
404 ArrayRef<char> RawName = Obj->getSectionRawName(DR);
405 StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
406 ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
407
408 DictScope SectionD(W, "Section");
409 W.printNumber("Index", SectionIndex);
410 W.printBinary("Name", Name, RawName);
411 W.printBinary("Segment", SegmentName, RawSegmentName);
412 W.printHex("Address", MOSection.Address);
413 W.printHex("Size", MOSection.Size);
414 W.printNumber("Offset", MOSection.Offset);
415 W.printNumber("Alignment", MOSection.Alignment);
416 W.printHex("RelocationOffset", MOSection.RelocationTableOffset);
417 W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries);
418 W.printEnum("Type", MOSection.Flags & 0xFF,
419 makeArrayRef(MachOSectionAttributes));
420 W.printFlags("Attributes", MOSection.Flags >> 8,
421 makeArrayRef(MachOSectionAttributes));
422 W.printHex("Reserved1", MOSection.Reserved1);
423 W.printHex("Reserved2", MOSection.Reserved2);
424
425 if (opts::SectionRelocations) {
426 ListScope D(W, "Relocations");
427 for (const RelocationRef &Reloc : Section.relocations())
428 printRelocation(Reloc);
429 }
430
431 if (opts::SectionSymbols) {
432 ListScope D(W, "Symbols");
433 for (const SymbolRef &Symbol : Obj->symbols()) {
434 if (!Section.containsSymbol(Symbol))
435 continue;
436
437 printSymbol(Symbol);
438 }
439 }
440
441 if (opts::SectionData) {
442 bool IsBSS = Section.isBSS();
443 if (!IsBSS) {
444 StringRef Data;
445 if (error(Section.getContents(Data)))
446 break;
447
448 W.printBinaryBlock("SectionData", Data);
449 }
450 }
451 }
452 }
453
printRelocations()454 void MachODumper::printRelocations() {
455 ListScope D(W, "Relocations");
456
457 std::error_code EC;
458 for (const SectionRef &Section : Obj->sections()) {
459 StringRef Name;
460 if (error(Section.getName(Name)))
461 continue;
462
463 bool PrintedGroup = false;
464 for (const RelocationRef &Reloc : Section.relocations()) {
465 if (!PrintedGroup) {
466 W.startLine() << "Section " << Name << " {\n";
467 W.indent();
468 PrintedGroup = true;
469 }
470
471 printRelocation(Reloc);
472 }
473
474 if (PrintedGroup) {
475 W.unindent();
476 W.startLine() << "}\n";
477 }
478 }
479 }
480
printRelocation(const RelocationRef & Reloc)481 void MachODumper::printRelocation(const RelocationRef &Reloc) {
482 return printRelocation(Obj, Reloc);
483 }
484
printRelocation(const MachOObjectFile * Obj,const RelocationRef & Reloc)485 void MachODumper::printRelocation(const MachOObjectFile *Obj,
486 const RelocationRef &Reloc) {
487 uint64_t Offset;
488 SmallString<32> RelocName;
489 if (error(Reloc.getOffset(Offset)))
490 return;
491 if (error(Reloc.getTypeName(RelocName)))
492 return;
493
494 DataRefImpl DR = Reloc.getRawDataRefImpl();
495 MachO::any_relocation_info RE = Obj->getRelocation(DR);
496 bool IsScattered = Obj->isRelocationScattered(RE);
497 SmallString<32> SymbolNameOrOffset("0x");
498 if (IsScattered) {
499 // Scattered relocations don't really have an associated symbol
500 // for some reason, even if one exists in the symtab at the correct address.
501 SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE));
502 } else {
503 symbol_iterator Symbol = Reloc.getSymbol();
504 if (Symbol != Obj->symbol_end()) {
505 StringRef SymbolName;
506 if (error(Symbol->getName(SymbolName)))
507 return;
508 SymbolNameOrOffset = SymbolName;
509 } else
510 SymbolNameOrOffset += utohexstr(Obj->getPlainRelocationSymbolNum(RE));
511 }
512
513 if (opts::ExpandRelocs) {
514 DictScope Group(W, "Relocation");
515 W.printHex("Offset", Offset);
516 W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE));
517 W.printNumber("Length", Obj->getAnyRelocationLength(RE));
518 if (IsScattered)
519 W.printString("Extern", StringRef("N/A"));
520 else
521 W.printNumber("Extern", Obj->getPlainRelocationExternal(RE));
522 W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE));
523 W.printString("Symbol", SymbolNameOrOffset);
524 W.printNumber("Scattered", IsScattered);
525 } else {
526 raw_ostream& OS = W.startLine();
527 OS << W.hex(Offset)
528 << " " << Obj->getAnyRelocationPCRel(RE)
529 << " " << Obj->getAnyRelocationLength(RE);
530 if (IsScattered)
531 OS << " n/a";
532 else
533 OS << " " << Obj->getPlainRelocationExternal(RE);
534 OS << " " << RelocName
535 << " " << IsScattered
536 << " " << SymbolNameOrOffset
537 << "\n";
538 }
539 }
540
printSymbols()541 void MachODumper::printSymbols() {
542 ListScope Group(W, "Symbols");
543
544 for (const SymbolRef &Symbol : Obj->symbols()) {
545 printSymbol(Symbol);
546 }
547 }
548
printDynamicSymbols()549 void MachODumper::printDynamicSymbols() {
550 ListScope Group(W, "DynamicSymbols");
551 }
552
printSymbol(const SymbolRef & Symbol)553 void MachODumper::printSymbol(const SymbolRef &Symbol) {
554 StringRef SymbolName;
555 if (Symbol.getName(SymbolName))
556 SymbolName = "";
557
558 MachOSymbol MOSymbol;
559 getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
560
561 StringRef SectionName = "";
562 section_iterator SecI(Obj->section_begin());
563 if (!error(Symbol.getSection(SecI)) && SecI != Obj->section_end())
564 error(SecI->getName(SectionName));
565
566 DictScope D(W, "Symbol");
567 W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
568 if (MOSymbol.Type & MachO::N_STAB) {
569 W.printHex("Type", "SymDebugTable", MOSymbol.Type);
570 } else {
571 if (MOSymbol.Type & MachO::N_PEXT)
572 W.startLine() << "PrivateExtern\n";
573 if (MOSymbol.Type & MachO::N_EXT)
574 W.startLine() << "Extern\n";
575 W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE),
576 makeArrayRef(MachOSymbolTypes));
577 }
578 W.printHex("Section", SectionName, MOSymbol.SectionIndex);
579 W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0xF),
580 makeArrayRef(MachOSymbolRefTypes));
581 W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0xF),
582 makeArrayRef(MachOSymbolFlags));
583 W.printHex("Value", MOSymbol.Value);
584 }
585
printUnwindInfo()586 void MachODumper::printUnwindInfo() {
587 W.startLine() << "UnwindInfo not implemented.\n";
588 }
589