1 //===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the MachO-specific dumper for llvm-readobj.
12 //===----------------------------------------------------------------------===//
14 #include "llvm-readobj.h"
16 #include "ObjDumper.h"
17 #include "StreamWriter.h"
19 #include "llvm/ADT/SmallString.h"
20 #include "llvm/Object/MachO.h"
21 #include "llvm/Support/Casting.h"
24 using namespace object;
28 class MachODumper : public ObjDumper {
30 MachODumper(const llvm::object::MachOObjectFileBase *Obj, StreamWriter& Writer)
34 virtual void printFileHeaders() LLVM_OVERRIDE;
35 virtual void printSections() LLVM_OVERRIDE;
36 virtual void printRelocations() LLVM_OVERRIDE;
37 virtual void printSymbols() LLVM_OVERRIDE;
38 virtual void printDynamicSymbols() LLVM_OVERRIDE;
39 virtual void printUnwindInfo() LLVM_OVERRIDE;
42 void printSymbol(symbol_iterator SymI);
44 void printRelocation(section_iterator SecI, relocation_iterator RelI);
46 const llvm::object::MachOObjectFileBase *Obj;
54 error_code createMachODumper(const object::ObjectFile *Obj,
56 OwningPtr<ObjDumper> &Result) {
57 const MachOObjectFileBase *MachOObj = dyn_cast<MachOObjectFileBase>(Obj);
59 return readobj_error::unsupported_obj_file_format;
61 Result.reset(new MachODumper(MachOObj, Writer));
62 return readobj_error::success;
68 static const EnumEntry<unsigned> MachOSectionTypes[] = {
70 { "ZeroFill" , 0x01 },
71 { "CStringLiterals" , 0x02 },
72 { "4ByteLiterals" , 0x03 },
73 { "8ByteLiterals" , 0x04 },
74 { "LiteralPointers" , 0x05 },
75 { "NonLazySymbolPointers" , 0x06 },
76 { "LazySymbolPointers" , 0x07 },
77 { "SymbolStubs" , 0x08 },
78 { "ModInitFuncs" , 0x09 },
79 { "ModTermFuncs" , 0x0A },
80 { "Coalesced" , 0x0B },
81 { "GBZeroFill" , 0x0C },
82 { "Interposing" , 0x0D },
83 { "16ByteLiterals" , 0x0E },
84 { "DTraceDOF" , 0x0F },
85 { "LazyDylibSymbolPoints" , 0x10 },
86 { "ThreadLocalRegular" , 0x11 },
87 { "ThreadLocalZerofill" , 0x12 },
88 { "ThreadLocalVariables" , 0x13 },
89 { "ThreadLocalVariablePointers" , 0x14 },
90 { "ThreadLocalInitFunctionPointers", 0x15 }
93 static const EnumEntry<unsigned> MachOSectionAttributes[] = {
94 { "LocReloc" , 1 << 0 /*S_ATTR_LOC_RELOC */ },
95 { "ExtReloc" , 1 << 1 /*S_ATTR_EXT_RELOC */ },
96 { "SomeInstructions" , 1 << 2 /*S_ATTR_SOME_INSTRUCTIONS */ },
97 { "Debug" , 1 << 17 /*S_ATTR_DEBUG */ },
98 { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
99 { "LiveSupport" , 1 << 19 /*S_ATTR_LIVE_SUPPORT */ },
100 { "NoDeadStrip" , 1 << 20 /*S_ATTR_NO_DEAD_STRIP */ },
101 { "StripStaticSyms" , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS */ },
102 { "NoTOC" , 1 << 22 /*S_ATTR_NO_TOC */ },
103 { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS */ },
106 static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
107 { "UndefinedNonLazy", 0 },
108 { "ReferenceFlagUndefinedLazy", 1 },
109 { "ReferenceFlagDefined", 2 },
110 { "ReferenceFlagPrivateDefined", 3 },
111 { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
112 { "ReferenceFlagPrivateUndefinedLazy", 5 }
115 static const EnumEntry<unsigned> MachOSymbolFlags[] = {
116 { "ReferencedDynamically", 0x10 },
117 { "NoDeadStrip", 0x20 },
122 static const EnumEntry<unsigned> MachOSymbolTypes[] = {
127 { "PreboundUndef", 0xC },
129 { "PrivateExternal", 0x10 }
137 struct MachOSection {
139 ArrayRef<char> SegmentName;
144 uint32_t RelocationTableOffset;
145 uint32_t NumRelocationTableEntries;
152 uint32_t StringIndex;
154 uint8_t SectionIndex;
160 static void getSection(const MachOObjectFileBase *Obj,
162 MachOSection &Section) {
163 if (const MachOObjectFile64Le *O = dyn_cast<MachOObjectFile64Le>(Obj)) {
164 const MachOObjectFile64Le::Section *Sect = O->getSection(DRI);
166 Section.Address = Sect->Address;
167 Section.Size = Sect->Size;
168 Section.Offset = Sect->Offset;
169 Section.Alignment = Sect->Align;
170 Section.RelocationTableOffset = Sect->RelocationTableOffset;
171 Section.NumRelocationTableEntries = Sect->NumRelocationTableEntries;
172 Section.Flags = Sect->Flags;
173 Section.Reserved1 = Sect->Reserved1;
174 Section.Reserved2 = Sect->Reserved2;
176 const MachOObjectFile32Le *O2 = cast<MachOObjectFile32Le>(Obj);
177 const MachOObjectFile32Le::Section *Sect = O2->getSection(DRI);
179 Section.Address = Sect->Address;
180 Section.Size = Sect->Size;
181 Section.Offset = Sect->Offset;
182 Section.Alignment = Sect->Align;
183 Section.RelocationTableOffset = Sect->RelocationTableOffset;
184 Section.NumRelocationTableEntries = Sect->NumRelocationTableEntries;
185 Section.Flags = Sect->Flags;
186 Section.Reserved1 = Sect->Reserved1;
187 Section.Reserved2 = Sect->Reserved2;
191 static void getSymbol(const MachOObjectFileBase *Obj,
193 MachOSymbol &Symbol) {
194 if (const MachOObjectFile64Le *O = dyn_cast<MachOObjectFile64Le>(Obj)) {
195 const MachOObjectFile64Le::SymbolTableEntry *Entry =
196 O->getSymbolTableEntry(DRI);
197 Symbol.StringIndex = Entry->StringIndex;
198 Symbol.Type = Entry->Type;
199 Symbol.SectionIndex = Entry->SectionIndex;
200 Symbol.Flags = Entry->Flags;
201 Symbol.Value = Entry->Value;
203 const MachOObjectFile32Le *O2 = cast<MachOObjectFile32Le>(Obj);
204 const MachOObjectFile32Le::SymbolTableEntry *Entry =
205 O2->getSymbolTableEntry(DRI);
206 Symbol.StringIndex = Entry->StringIndex;
207 Symbol.Type = Entry->Type;
208 Symbol.SectionIndex = Entry->SectionIndex;
209 Symbol.Flags = Entry->Flags;
210 Symbol.Value = Entry->Value;
214 void MachODumper::printFileHeaders() {
215 W.startLine() << "FileHeaders not implemented.\n";
218 void MachODumper::printSections() {
219 ListScope Group(W, "Sections");
221 int SectionIndex = -1;
223 for (section_iterator SecI = Obj->begin_sections(),
224 SecE = Obj->end_sections();
225 SecI != SecE; SecI.increment(EC)) {
226 if (error(EC)) break;
230 MachOSection Section;
231 getSection(Obj, SecI->getRawDataRefImpl(), Section);
232 DataRefImpl DR = SecI->getRawDataRefImpl();
235 if (error(SecI->getName(Name)))
238 ArrayRef<char> RawName = Obj->getSectionRawName(DR);
239 StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
240 ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
242 DictScope SectionD(W, "Section");
243 W.printNumber("Index", SectionIndex);
244 W.printBinary("Name", Name, RawName);
245 W.printBinary("Segment", SegmentName, RawSegmentName);
246 W.printHex ("Address", Section.Address);
247 W.printHex ("Size", Section.Size);
248 W.printNumber("Offset", Section.Offset);
249 W.printNumber("Alignment", Section.Alignment);
250 W.printHex ("RelocationOffset", Section.RelocationTableOffset);
251 W.printNumber("RelocationCount", Section.NumRelocationTableEntries);
252 W.printEnum ("Type", Section.Flags & 0xFF,
253 makeArrayRef(MachOSectionAttributes));
254 W.printFlags ("Attributes", Section.Flags >> 8,
255 makeArrayRef(MachOSectionAttributes));
256 W.printHex ("Reserved1", Section.Reserved1);
257 W.printHex ("Reserved2", Section.Reserved2);
259 if (opts::SectionRelocations) {
260 ListScope D(W, "Relocations");
261 for (relocation_iterator RelI = SecI->begin_relocations(),
262 RelE = SecI->end_relocations();
263 RelI != RelE; RelI.increment(EC)) {
264 if (error(EC)) break;
266 printRelocation(SecI, RelI);
270 if (opts::SectionSymbols) {
271 ListScope D(W, "Symbols");
272 for (symbol_iterator SymI = Obj->begin_symbols(),
273 SymE = Obj->end_symbols();
274 SymI != SymE; SymI.increment(EC)) {
275 if (error(EC)) break;
277 bool Contained = false;
278 if (SecI->containsSymbol(*SymI, Contained) || !Contained)
285 if (opts::SectionData) {
287 if (error(SecI->getContents(Data))) break;
289 W.printBinaryBlock("SectionData", Data);
294 void MachODumper::printRelocations() {
295 ListScope D(W, "Relocations");
298 for (section_iterator SecI = Obj->begin_sections(),
299 SecE = Obj->end_sections();
300 SecI != SecE; SecI.increment(EC)) {
301 if (error(EC)) break;
304 if (error(SecI->getName(Name)))
307 bool PrintedGroup = false;
308 for (relocation_iterator RelI = SecI->begin_relocations(),
309 RelE = SecI->end_relocations();
310 RelI != RelE; RelI.increment(EC)) {
311 if (error(EC)) break;
314 W.startLine() << "Section " << Name << " {\n";
319 printRelocation(SecI, RelI);
324 W.startLine() << "}\n";
329 void MachODumper::printRelocation(section_iterator SecI,
330 relocation_iterator RelI) {
332 SmallString<32> RelocName;
333 StringRef SymbolName;
335 if (error(RelI->getOffset(Offset))) return;
336 if (error(RelI->getTypeName(RelocName))) return;
337 if (error(RelI->getSymbol(Symbol))) return;
338 if (error(Symbol.getName(SymbolName))) return;
340 DataRefImpl DR = RelI->getRawDataRefImpl();
341 const MachOObjectFileBase::RelocationEntry *RE = Obj->getRelocation(DR);
342 bool IsScattered = Obj->isScattered(RE);
344 if (opts::ExpandRelocs) {
345 DictScope Group(W, "Relocation");
346 W.printHex("Offset", Offset);
347 W.printNumber("PCRel", Obj->isPCRel(RE));
348 W.printNumber("Length", Obj->getLength(RE));
350 W.printString("Extern", StringRef("N/A"));
352 W.printNumber("Extern", RE->getExternal());
353 W.printNumber("Type", RelocName, RE->getType());
354 W.printString("Symbol", SymbolName.size() > 0 ? SymbolName : "-");
355 W.printNumber("Scattered", IsScattered);
357 raw_ostream& OS = W.startLine();
359 << " " << Obj->isPCRel(RE)
360 << " " << Obj->getLength(RE);
364 OS << " " << RE->getExternal();
365 OS << " " << RelocName
366 << " " << IsScattered
367 << " " << (SymbolName.size() > 0 ? SymbolName : "-")
372 void MachODumper::printSymbols() {
373 ListScope Group(W, "Symbols");
376 for (symbol_iterator SymI = Obj->begin_symbols(),
377 SymE = Obj->end_symbols();
378 SymI != SymE; SymI.increment(EC)) {
379 if (error(EC)) break;
385 void MachODumper::printDynamicSymbols() {
386 ListScope Group(W, "DynamicSymbols");
389 void MachODumper::printSymbol(symbol_iterator SymI) {
392 StringRef SymbolName;
393 if (SymI->getName(SymbolName))
397 getSymbol(Obj, SymI->getRawDataRefImpl(), Symbol);
399 StringRef SectionName;
400 section_iterator SecI(Obj->end_sections());
401 if (error(SymI->getSection(SecI)) ||
402 error(SecI->getName(SectionName)))
405 DictScope D(W, "Symbol");
406 W.printNumber("Name", SymbolName, Symbol.StringIndex);
407 if (Symbol.Type & N_STAB) {
408 W.printHex ("Type", "SymDebugTable", Symbol.Type);
410 W.printEnum("Type", Symbol.Type, makeArrayRef(MachOSymbolTypes));
412 W.printHex ("Section", SectionName, Symbol.SectionIndex);
413 W.printEnum ("RefType", static_cast<uint16_t>(Symbol.Flags & 0xF),
414 makeArrayRef(MachOSymbolRefTypes));
415 W.printFlags ("Flags", static_cast<uint16_t>(Symbol.Flags & ~0xF),
416 makeArrayRef(MachOSymbolFlags));
417 W.printHex ("Value", Symbol.Value);
420 void MachODumper::printUnwindInfo() {
421 W.startLine() << "UnwindInfo not implemented.\n";