1 //===- MachO.h - MachO object file implementation ---------------*- 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 declares the MachOObjectFile class, which implement the ObjectFile
11 // interface for MachO files.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_OBJECT_MACHO_H
16 #define LLVM_OBJECT_MACHO_H
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/ADT/Triple.h"
21 #include "llvm/Object/ObjectFile.h"
22 #include "llvm/Support/MachO.h"
27 /// DiceRef - This is a value type class that represents a single
28 /// data in code entry in the table in a Mach-O object file.
30 DataRefImpl DicePimpl;
31 const ObjectFile *OwningObject;
34 DiceRef() : OwningObject(NULL) { }
36 DiceRef(DataRefImpl DiceP, const ObjectFile *Owner);
38 bool operator==(const DiceRef &Other) const;
39 bool operator<(const DiceRef &Other) const;
41 error_code getNext(DiceRef &Result) const;
43 error_code getOffset(uint32_t &Result) const;
44 error_code getLength(uint16_t &Result) const;
45 error_code getKind(uint16_t &Result) const;
47 DataRefImpl getRawDataRefImpl() const;
48 const ObjectFile *getObjectFile() const;
50 typedef content_iterator<DiceRef> dice_iterator;
52 class MachOObjectFile : public ObjectFile {
54 struct LoadCommandInfo {
55 const char *Ptr; // Where in memory the load command is.
56 MachO::load_command C; // The command itself.
59 MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian, bool Is64Bits,
60 error_code &EC, bool BufferOwned = true);
62 error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const
64 error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const
66 error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const
68 error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const
70 error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const
72 error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const LLVM_OVERRIDE;
73 error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const
75 error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const
77 error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const
79 error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const
82 error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const
84 error_code getSectionName(DataRefImpl Sec, StringRef &Res) const
86 error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const
88 error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const LLVM_OVERRIDE;
89 error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const
91 error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const
93 error_code isSectionText(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
94 error_code isSectionData(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
95 error_code isSectionBSS(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
96 error_code isSectionRequiredForExecution(DataRefImpl Sec, bool &Res) const
98 error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
99 error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
100 error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const
102 error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
103 bool &Result) const LLVM_OVERRIDE;
104 relocation_iterator section_rel_begin(DataRefImpl Sec) const LLVM_OVERRIDE;
105 relocation_iterator section_rel_end(DataRefImpl Sec) const LLVM_OVERRIDE;
107 error_code getRelocationNext(DataRefImpl Rel, RelocationRef &Res) const
109 error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const
111 error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const
113 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const LLVM_OVERRIDE;
114 error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const
116 error_code getRelocationTypeName(DataRefImpl Rel,
117 SmallVectorImpl<char> &Result) const
119 error_code getRelocationValueString(DataRefImpl Rel,
120 SmallVectorImpl<char> &Result) const
122 error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const
125 error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const
127 error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const
130 // TODO: Would be useful to have an iterator based version
131 // of the load command interface too.
133 symbol_iterator begin_symbols() const LLVM_OVERRIDE;
134 symbol_iterator end_symbols() const LLVM_OVERRIDE;
136 symbol_iterator begin_dynamic_symbols() const LLVM_OVERRIDE;
137 symbol_iterator end_dynamic_symbols() const LLVM_OVERRIDE;
139 section_iterator begin_sections() const LLVM_OVERRIDE;
140 section_iterator end_sections() const LLVM_OVERRIDE;
142 library_iterator begin_libraries_needed() const LLVM_OVERRIDE;
143 library_iterator end_libraries_needed() const LLVM_OVERRIDE;
145 uint8_t getBytesInAddress() const LLVM_OVERRIDE;
147 StringRef getFileFormatName() const LLVM_OVERRIDE;
148 unsigned getArch() const LLVM_OVERRIDE;
150 StringRef getLoadName() const LLVM_OVERRIDE;
152 relocation_iterator section_rel_begin(unsigned Index) const;
153 relocation_iterator section_rel_end(unsigned Index) const;
155 dice_iterator begin_dices() const;
156 dice_iterator end_dices() const;
158 // In a MachO file, sections have a segment name. This is used in the .o
159 // files. They have a single segment, but this field specifies which segment
160 // a section should be put in in the final object.
161 StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
163 // Names are stored as 16 bytes. These returns the raw 16 bytes without
164 // interpreting them as a C string.
165 ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
166 ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
168 // MachO specific Info about relocations.
169 bool isRelocationScattered(const MachO::any_relocation_info &RE) const;
170 unsigned getPlainRelocationSymbolNum(
171 const MachO::any_relocation_info &RE) const;
172 bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const;
173 bool getScatteredRelocationScattered(
174 const MachO::any_relocation_info &RE) const;
175 uint32_t getScatteredRelocationValue(
176 const MachO::any_relocation_info &RE) const;
177 unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const;
178 unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
179 unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
180 unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
181 SectionRef getRelocationSection(const MachO::any_relocation_info &RE) const;
183 // Walk load commands.
184 LoadCommandInfo getFirstLoadCommandInfo() const;
185 LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
187 // MachO specific structures.
188 MachO::section getSection(DataRefImpl DRI) const;
189 MachO::section_64 getSection64(DataRefImpl DRI) const;
190 MachO::section getSection(const LoadCommandInfo &L, unsigned Index) const;
191 MachO::section_64 getSection64(const LoadCommandInfo &L,unsigned Index) const;
192 MachO::nlist getSymbolTableEntry(DataRefImpl DRI) const;
193 MachO::nlist_64 getSymbol64TableEntry(DataRefImpl DRI) const;
195 MachO::linkedit_data_command
196 getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
197 MachO::segment_command
198 getSegmentLoadCommand(const LoadCommandInfo &L) const;
199 MachO::segment_command_64
200 getSegment64LoadCommand(const LoadCommandInfo &L) const;
201 MachO::linker_options_command
202 getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
204 MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
205 MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
206 MachO::mach_header getHeader() const;
207 MachO::mach_header_64 getHeader64() const;
209 getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC,
210 unsigned Index) const;
211 MachO::data_in_code_entry getDataInCodeTableEntry(uint32_t DataOffset,
212 unsigned Index) const;
213 MachO::symtab_command getSymtabLoadCommand() const;
214 MachO::dysymtab_command getDysymtabLoadCommand() const;
215 MachO::linkedit_data_command getDataInCodeLoadCommand() const;
217 StringRef getStringTableData() const;
218 bool is64Bit() const;
219 void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
221 static Triple::ArchType getArch(uint32_t CPUType);
223 static bool classof(const Binary *v) {
228 typedef SmallVector<const char*, 1> SectionList;
229 SectionList Sections;
230 const char *SymtabLoadCmd;
231 const char *DysymtabLoadCmd;
232 const char *DataInCodeLoadCmd;
236 inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
237 : DicePimpl(DiceP) , OwningObject(Owner) {}
239 inline bool DiceRef::operator==(const DiceRef &Other) const {
240 return DicePimpl == Other.DicePimpl;
243 inline bool DiceRef::operator<(const DiceRef &Other) const {
244 return DicePimpl < Other.DicePimpl;
247 inline error_code DiceRef::getNext(DiceRef &Result) const {
248 DataRefImpl Rel = DicePimpl;
249 const MachO::data_in_code_entry *P =
250 reinterpret_cast<const MachO::data_in_code_entry *>(Rel.p);
251 Rel.p = reinterpret_cast<uintptr_t>(P + 1);
252 Result = DiceRef(Rel, OwningObject);
253 return object_error::success;
256 // Since a Mach-O data in code reference, a DiceRef, can only be created when
257 // the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
258 // the methods that get the values of the fields of the reference.
260 inline error_code DiceRef::getOffset(uint32_t &Result) const {
261 const MachOObjectFile *MachOOF =
262 static_cast<const MachOObjectFile *>(OwningObject);
263 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
264 Result = Dice.offset;
265 return object_error::success;
268 inline error_code DiceRef::getLength(uint16_t &Result) const {
269 const MachOObjectFile *MachOOF =
270 static_cast<const MachOObjectFile *>(OwningObject);
271 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
272 Result = Dice.length;
273 return object_error::success;
276 inline error_code DiceRef::getKind(uint16_t &Result) const {
277 const MachOObjectFile *MachOOF =
278 static_cast<const MachOObjectFile *>(OwningObject);
279 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
281 return object_error::success;
284 inline DataRefImpl DiceRef::getRawDataRefImpl() const {
288 inline const ObjectFile *DiceRef::getObjectFile() const {