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, error_code &ec)
36 : ObjectFile(Binary::isMachO, Object, ec),
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) {
78 MachOObject *MachOObj = MachOObject::LoadFromBuffer(Buffer, &Err);
81 return new MachOObjectFile(Buffer, MachOObj, ec);
84 /*===-- Symbols -----------------------------------------------------------===*/
86 void MachOObjectFile::moveToNextSymbol(DataRefImpl &DRI) const {
87 uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
88 while (DRI.d.a < LoadCommandCount) {
89 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
90 if (LCI.Command.Type == macho::LCT_Symtab) {
91 InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
92 MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
93 if (DRI.d.b < SymtabLoadCmd->NumSymbolTableEntries)
102 void MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI,
103 InMemoryStruct<macho::SymbolTableEntry> &Res) const {
104 InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
105 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
106 MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
108 if (RegisteredStringTable != DRI.d.a) {
109 MachOObj->RegisterStringTable(*SymtabLoadCmd);
110 RegisteredStringTable = DRI.d.a;
113 MachOObj->ReadSymbolTableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
118 SymbolRef MachOObjectFile::getSymbolNext(DataRefImpl DRI) const {
120 moveToNextSymbol(DRI);
121 return SymbolRef(DRI, this);
124 StringRef MachOObjectFile::getSymbolName(DataRefImpl DRI) const {
125 InMemoryStruct<macho::SymbolTableEntry> Entry;
126 getSymbolTableEntry(DRI, Entry);
127 return MachOObj->getStringAtIndex(Entry->StringIndex);
130 uint64_t MachOObjectFile::getSymbolAddress(DataRefImpl DRI) const {
131 InMemoryStruct<macho::SymbolTableEntry> Entry;
132 getSymbolTableEntry(DRI, Entry);
136 uint64_t MachOObjectFile::getSymbolSize(DataRefImpl DRI) const {
137 return UnknownAddressOrSize;
140 char MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI) const {
141 InMemoryStruct<macho::SymbolTableEntry> Entry;
142 getSymbolTableEntry(DRI, Entry);
145 switch (Entry->Type & macho::STF_TypeMask) {
146 case macho::STT_Undefined:
149 case macho::STT_Absolute:
150 case macho::STT_Section:
158 if (Entry->Flags & (macho::STF_External | macho::STF_PrivateExtern))
159 Char = toupper(Char);
163 bool MachOObjectFile::isSymbolInternal(DataRefImpl DRI) const {
164 InMemoryStruct<macho::SymbolTableEntry> Entry;
165 getSymbolTableEntry(DRI, Entry);
166 return Entry->Flags & macho::STF_StabsEntryMask;
169 ObjectFile::symbol_iterator MachOObjectFile::begin_symbols() const {
170 // DRI.d.a = segment number; DRI.d.b = symbol index.
172 DRI.d.a = DRI.d.b = 0;
173 moveToNextSymbol(DRI);
174 return symbol_iterator(SymbolRef(DRI, this));
177 ObjectFile::symbol_iterator MachOObjectFile::end_symbols() const {
179 DRI.d.a = MachOObj->getHeader().NumLoadCommands;
181 return symbol_iterator(SymbolRef(DRI, this));
185 /*===-- Sections ----------------------------------------------------------===*/
187 void MachOObjectFile::moveToNextSection(DataRefImpl &DRI) const {
188 uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
189 while (DRI.d.a < LoadCommandCount) {
190 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
191 if (LCI.Command.Type == macho::LCT_Segment) {
192 InMemoryStruct<macho::SegmentLoadCommand> SegmentLoadCmd;
193 MachOObj->ReadSegmentLoadCommand(LCI, SegmentLoadCmd);
194 if (DRI.d.b < SegmentLoadCmd->NumSections)
196 } else if (LCI.Command.Type == macho::LCT_Segment64) {
197 InMemoryStruct<macho::Segment64LoadCommand> Segment64LoadCmd;
198 MachOObj->ReadSegment64LoadCommand(LCI, Segment64LoadCmd);
199 if (DRI.d.b < Segment64LoadCmd->NumSections)
208 SectionRef MachOObjectFile::getSectionNext(DataRefImpl DRI) const {
210 moveToNextSection(DRI);
211 return SectionRef(DRI, this);
215 MachOObjectFile::getSection(DataRefImpl DRI,
216 InMemoryStruct<macho::Section> &Res) const {
217 InMemoryStruct<macho::SegmentLoadCommand> SLC;
218 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
219 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
220 MachOObj->ReadSection(LCI, DRI.d.b, Res);
223 StringRef MachOObjectFile::getSectionName(DataRefImpl DRI) const {
224 InMemoryStruct<macho::SegmentLoadCommand> SLC;
225 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
226 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
227 InMemoryStruct<macho::Section> Sect;
228 MachOObj->ReadSection(LCI, DRI.d.b, Sect);
230 static char Result[34];
231 strcpy(Result, SLC->Name);
233 strcat(Result, Sect->Name);
234 return StringRef(Result);
237 uint64_t MachOObjectFile::getSectionAddress(DataRefImpl DRI) const {
238 InMemoryStruct<macho::Section> Sect;
239 getSection(DRI, Sect);
240 return Sect->Address;
243 uint64_t MachOObjectFile::getSectionSize(DataRefImpl DRI) const {
244 InMemoryStruct<macho::Section> Sect;
245 getSection(DRI, Sect);
249 StringRef MachOObjectFile::getSectionContents(DataRefImpl DRI) const {
250 InMemoryStruct<macho::Section> Sect;
251 getSection(DRI, Sect);
252 return MachOObj->getData(Sect->Offset, Sect->Size);
255 bool MachOObjectFile::isSectionText(DataRefImpl DRI) const {
256 InMemoryStruct<macho::SegmentLoadCommand> SLC;
257 LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
258 MachOObj->ReadSegmentLoadCommand(LCI, SLC);
259 return !strcmp(SLC->Name, "__TEXT");
262 ObjectFile::section_iterator MachOObjectFile::begin_sections() const {
264 DRI.d.a = DRI.d.b = 0;
265 moveToNextSection(DRI);
266 return section_iterator(SectionRef(DRI, this));
269 ObjectFile::section_iterator MachOObjectFile::end_sections() const {
271 DRI.d.a = MachOObj->getHeader().NumLoadCommands;
273 return section_iterator(SectionRef(DRI, this));
276 /*===-- Miscellaneous -----------------------------------------------------===*/
278 uint8_t MachOObjectFile::getBytesInAddress() const {
279 return MachOObj->is64Bit() ? 8 : 4;
282 StringRef MachOObjectFile::getFileFormatName() const {
283 if (!MachOObj->is64Bit()) {
284 switch (MachOObj->getHeader().CPUType) {
285 case llvm::MachO::CPUTypeI386:
286 return "Mach-O 32-bit i386";
287 case llvm::MachO::CPUTypeARM:
289 case llvm::MachO::CPUTypePowerPC:
290 return "Mach-O 32-bit ppc";
292 assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 0 &&
293 "64-bit object file when we're not 64-bit?");
294 return "Mach-O 32-bit unknown";
298 switch (MachOObj->getHeader().CPUType) {
299 case llvm::MachO::CPUTypeX86_64:
300 return "Mach-O 64-bit x86-64";
301 case llvm::MachO::CPUTypePowerPC64:
302 return "Mach-O 64-bit ppc64";
304 assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 1 &&
305 "32-bit object file when we're 64-bit?");
306 return "Mach-O 64-bit unknown";
310 unsigned MachOObjectFile::getArch() const {
311 switch (MachOObj->getHeader().CPUType) {
312 case llvm::MachO::CPUTypeI386:
314 case llvm::MachO::CPUTypeX86_64:
315 return Triple::x86_64;
316 case llvm::MachO::CPUTypeARM:
318 case llvm::MachO::CPUTypePowerPC:
320 case llvm::MachO::CPUTypePowerPC64:
321 return Triple::ppc64;
323 return Triple::UnknownArch;
327 } // end namespace llvm