1 //===- MachOObjectFile.cpp - Mach-O object file binding ---------*- C++ -*-===//
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 defines the MachOObjectFile class, which binds the MachOObject
11 // class to the generic ObjectFile wrapper.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/Object/MachOFormat.h"
17 #include "llvm/Object/MachOObject.h"
18 #include "llvm/Object/ObjectFile.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/MachO.h"
27 using namespace object;
31 typedef MachOObject::LoadCommandInfo LoadCommandInfo;
33 class MachOObjectFile : public ObjectFile {
35 MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO)
38 RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {}
40 virtual symbol_iterator begin_symbols() const;
41 virtual symbol_iterator end_symbols() const;
42 virtual section_iterator begin_sections() const;
43 virtual section_iterator end_sections() const;
45 virtual uint8_t getBytesInAddress() const;
46 virtual StringRef getFileFormatName() const;
47 virtual unsigned getArch() const;
50 virtual SymbolRef getSymbolNext(DataRefImpl Symb) const;
51 virtual StringRef getSymbolName(DataRefImpl Symb) const;
52 virtual uint64_t getSymbolAddress(DataRefImpl Symb) const;
53 virtual uint64_t getSymbolSize(DataRefImpl Symb) const;
54 virtual char getSymbolNMTypeChar(DataRefImpl Symb) const;
55 virtual bool isSymbolInternal(DataRefImpl Symb) const;
57 virtual SectionRef getSectionNext(DataRefImpl Sec) const;
58 virtual StringRef getSectionName(DataRefImpl Sec) const;
59 virtual uint64_t getSectionAddress(DataRefImpl Sec) const;
60 virtual uint64_t getSectionSize(DataRefImpl Sec) const;
61 virtual StringRef getSectionContents(DataRefImpl Sec) const;
62 virtual bool isSectionText(DataRefImpl Sec) const;
65 MachOObject *MachOObj;
66 mutable uint32_t RegisteredStringTable;
68 void moveToNextSection(DataRefImpl &DRI) const;
69 void getSymbolTableEntry(DataRefImpl DRI,
70 InMemoryStruct<macho::SymbolTableEntry> &Res) const;
71 void moveToNextSymbol(DataRefImpl &DRI) const;
72 void getSection(DataRefImpl DRI, InMemoryStruct<macho::Section> &Res) const;
75 ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
77 MachOObject *MachOObj = MachOObject::LoadFromBuffer(Buffer, &Err);
80 return new MachOObjectFile(Buffer, MachOObj);
83 /*===-- Symbols -----------------------------------------------------------===*/
85 void MachOObjectFile::moveToNextSymbol(DataRefImpl &DRI) const {
86 uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
87 while (DRI.d.a < LoadCommandCount) {
88 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
89 if (LCI.Command.Type == macho::LCT_Symtab) {
90 InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
91 MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
92 if (DRI.d.b < SymtabLoadCmd->NumSymbolTableEntries)
101 void MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI,
102 InMemoryStruct<macho::SymbolTableEntry> &Res) const {
103 InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
104 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
105 MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
107 if (RegisteredStringTable != DRI.d.a) {
108 MachOObj->RegisterStringTable(*SymtabLoadCmd);
109 RegisteredStringTable = DRI.d.a;
112 MachOObj->ReadSymbolTableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
117 SymbolRef MachOObjectFile::getSymbolNext(DataRefImpl DRI) const {
119 moveToNextSymbol(DRI);
120 return SymbolRef(DRI, this);
123 StringRef MachOObjectFile::getSymbolName(DataRefImpl DRI) const {
124 InMemoryStruct<macho::SymbolTableEntry> Entry;
125 getSymbolTableEntry(DRI, Entry);
126 return MachOObj->getStringAtIndex(Entry->StringIndex);
129 uint64_t MachOObjectFile::getSymbolAddress(DataRefImpl DRI) const {
130 InMemoryStruct<macho::SymbolTableEntry> Entry;
131 getSymbolTableEntry(DRI, Entry);
135 uint64_t MachOObjectFile::getSymbolSize(DataRefImpl DRI) const {
136 return UnknownAddressOrSize;
139 char MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI) const {
140 InMemoryStruct<macho::SymbolTableEntry> Entry;
141 getSymbolTableEntry(DRI, Entry);
144 switch (Entry->Type & macho::STF_TypeMask) {
145 case macho::STT_Undefined:
148 case macho::STT_Absolute:
149 case macho::STT_Section:
157 if (Entry->Flags & (macho::STF_External | macho::STF_PrivateExtern))
158 Char = toupper(Char);
162 bool MachOObjectFile::isSymbolInternal(DataRefImpl DRI) const {
163 InMemoryStruct<macho::SymbolTableEntry> Entry;
164 getSymbolTableEntry(DRI, Entry);
165 return Entry->Flags & macho::STF_StabsEntryMask;
168 ObjectFile::symbol_iterator MachOObjectFile::begin_symbols() const {
169 // DRI.d.a = segment number; DRI.d.b = symbol index.
171 DRI.d.a = DRI.d.b = 0;
172 moveToNextSymbol(DRI);
173 return symbol_iterator(SymbolRef(DRI, this));
176 ObjectFile::symbol_iterator MachOObjectFile::end_symbols() const {
178 DRI.d.a = MachOObj->getHeader().NumLoadCommands;
180 return symbol_iterator(SymbolRef(DRI, this));
184 /*===-- Sections ----------------------------------------------------------===*/
186 void MachOObjectFile::moveToNextSection(DataRefImpl &DRI) const {
187 uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
188 while (DRI.d.a < LoadCommandCount) {
189 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
190 if (LCI.Command.Type == macho::LCT_Segment) {
191 InMemoryStruct<macho::SegmentLoadCommand> SegmentLoadCmd;
192 MachOObj->ReadSegmentLoadCommand(LCI, SegmentLoadCmd);
193 if (DRI.d.b < SegmentLoadCmd->NumSections)
195 } else if (LCI.Command.Type == macho::LCT_Segment64) {
196 InMemoryStruct<macho::Segment64LoadCommand> Segment64LoadCmd;
197 MachOObj->ReadSegment64LoadCommand(LCI, Segment64LoadCmd);
198 if (DRI.d.b < Segment64LoadCmd->NumSections)
207 SectionRef MachOObjectFile::getSectionNext(DataRefImpl DRI) const {
209 moveToNextSection(DRI);
210 return SectionRef(DRI, this);
214 MachOObjectFile::getSection(DataRefImpl DRI,
215 InMemoryStruct<macho::Section> &Res) const {
216 InMemoryStruct<macho::SegmentLoadCommand> SLC;
217 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
218 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
219 MachOObj->ReadSection(LCI, DRI.d.b, Res);
222 StringRef MachOObjectFile::getSectionName(DataRefImpl DRI) const {
223 InMemoryStruct<macho::SegmentLoadCommand> SLC;
224 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
225 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
226 InMemoryStruct<macho::Section> Sect;
227 MachOObj->ReadSection(LCI, DRI.d.b, Sect);
229 static char Result[34];
230 strcpy(Result, SLC->Name);
232 strcat(Result, Sect->Name);
233 return StringRef(Result);
236 uint64_t MachOObjectFile::getSectionAddress(DataRefImpl DRI) const {
237 InMemoryStruct<macho::Section> Sect;
238 getSection(DRI, Sect);
239 return Sect->Address;
242 uint64_t MachOObjectFile::getSectionSize(DataRefImpl DRI) const {
243 InMemoryStruct<macho::Section> Sect;
244 getSection(DRI, Sect);
248 StringRef MachOObjectFile::getSectionContents(DataRefImpl DRI) const {
249 InMemoryStruct<macho::Section> Sect;
250 getSection(DRI, Sect);
251 return MachOObj->getData(Sect->Offset, Sect->Size);
254 bool MachOObjectFile::isSectionText(DataRefImpl DRI) const {
255 InMemoryStruct<macho::SegmentLoadCommand> SLC;
256 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
257 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
258 return !strcmp(SLC->Name, "__TEXT");
261 ObjectFile::section_iterator MachOObjectFile::begin_sections() const {
263 DRI.d.a = DRI.d.b = 0;
264 moveToNextSection(DRI);
265 return section_iterator(SectionRef(DRI, this));
268 ObjectFile::section_iterator MachOObjectFile::end_sections() const {
270 DRI.d.a = MachOObj->getHeader().NumLoadCommands;
272 return section_iterator(SectionRef(DRI, this));
275 /*===-- Miscellaneous -----------------------------------------------------===*/
277 uint8_t MachOObjectFile::getBytesInAddress() const {
278 return MachOObj->is64Bit() ? 8 : 4;
281 StringRef MachOObjectFile::getFileFormatName() const {
282 if (!MachOObj->is64Bit()) {
283 switch (MachOObj->getHeader().CPUType) {
284 case llvm::MachO::CPUTypeI386:
285 return "Mach-O 32-bit i386";
286 case llvm::MachO::CPUTypeARM:
288 case llvm::MachO::CPUTypePowerPC:
289 return "Mach-O 32-bit ppc";
291 assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 0 &&
292 "64-bit object file when we're not 64-bit?");
293 return "Mach-O 32-bit unknown";
297 switch (MachOObj->getHeader().CPUType) {
298 case llvm::MachO::CPUTypeX86_64:
299 return "Mach-O 64-bit x86-64";
300 case llvm::MachO::CPUTypePowerPC64:
301 return "Mach-O 64-bit ppc64";
303 assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 1 &&
304 "32-bit object file when we're 64-bit?");
305 return "Mach-O 64-bit unknown";
309 unsigned MachOObjectFile::getArch() const {
310 switch (MachOObj->getHeader().CPUType) {
311 case llvm::MachO::CPUTypeI386:
313 case llvm::MachO::CPUTypeX86_64:
314 return Triple::x86_64;
315 case llvm::MachO::CPUTypeARM:
317 case llvm::MachO::CPUTypePowerPC:
319 case llvm::MachO::CPUTypePowerPC64:
320 return Triple::ppc64;
322 return Triple::UnknownArch;
326 } // end namespace llvm