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/Object/MachOFormat.h"
21 #include "llvm/Object/ObjectFile.h"
22 #include "llvm/Support/MachO.h"
23 #include "llvm/Support/raw_ostream.h"
28 /// DiceRef - This is a value type class that represents a single
29 /// data in code entry in the table in a Mach-O object file.
31 DataRefImpl DicePimpl;
32 const ObjectFile *OwningObject;
35 DiceRef() : OwningObject(NULL) { }
37 DiceRef(DataRefImpl DiceP, const ObjectFile *Owner);
39 bool operator==(const DiceRef &Other) const;
40 bool operator<(const DiceRef &Other) const;
42 error_code getNext(DiceRef &Result) const;
44 error_code getOffset(uint32_t &Result) const;
45 error_code getLength(uint16_t &Result) const;
46 error_code getKind(uint16_t &Result) const;
48 DataRefImpl getRawDataRefImpl() const;
49 const ObjectFile *getObjectFile() const;
51 typedef content_iterator<DiceRef> dice_iterator;
53 class MachOObjectFile : public ObjectFile {
55 struct LoadCommandInfo {
56 const char *Ptr; // Where in memory the load command is.
57 macho::LoadCommand C; // The command itself.
60 MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian, bool Is64Bits,
63 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
64 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
65 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
66 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
67 virtual error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const;
68 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
69 virtual error_code getSymbolType(DataRefImpl Symb,
70 SymbolRef::Type &Res) const;
71 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
72 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
73 virtual error_code getSymbolSection(DataRefImpl Symb,
74 section_iterator &Res) const;
75 virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
77 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
78 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
79 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
80 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
81 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
82 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
83 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
84 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
85 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
86 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
88 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
89 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
90 virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const;
91 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
93 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
94 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
96 virtual error_code getRelocationNext(DataRefImpl Rel,
97 RelocationRef &Res) const;
98 virtual error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const;
99 virtual error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const;
100 virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const;
101 virtual error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const;
102 virtual error_code getRelocationTypeName(DataRefImpl Rel,
103 SmallVectorImpl<char> &Result) const;
104 virtual error_code getRelocationValueString(DataRefImpl Rel,
105 SmallVectorImpl<char> &Result) const;
106 virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const;
108 virtual error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const;
109 virtual error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const;
111 // TODO: Would be useful to have an iterator based version
112 // of the load command interface too.
114 virtual symbol_iterator begin_symbols() const;
115 virtual symbol_iterator end_symbols() const;
117 virtual symbol_iterator begin_dynamic_symbols() const;
118 virtual symbol_iterator end_dynamic_symbols() const;
120 virtual section_iterator begin_sections() const;
121 virtual section_iterator end_sections() const;
123 virtual library_iterator begin_libraries_needed() const;
124 virtual library_iterator end_libraries_needed() const;
126 virtual uint8_t getBytesInAddress() const;
128 virtual StringRef getFileFormatName() const;
129 virtual unsigned getArch() const;
131 virtual StringRef getLoadName() const;
133 relocation_iterator getSectionRelBegin(unsigned Index) const;
134 relocation_iterator getSectionRelEnd(unsigned Index) const;
136 dice_iterator begin_dices() const;
137 dice_iterator end_dices() const;
139 // In a MachO file, sections have a segment name. This is used in the .o
140 // files. They have a single segment, but this field specifies which segment
141 // a section should be put in in the final object.
142 StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
144 // Names are stored as 16 bytes. These returns the raw 16 bytes without
145 // interpreting them as a C string.
146 ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
147 ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
149 // MachO specific Info about relocations.
150 bool isRelocationScattered(const macho::RelocationEntry &RE) const;
151 unsigned getPlainRelocationSymbolNum(const macho::RelocationEntry &RE) const;
152 bool getPlainRelocationExternal(const macho::RelocationEntry &RE) const;
153 bool getScatteredRelocationScattered(const macho::RelocationEntry &RE) const;
154 uint32_t getScatteredRelocationValue(const macho::RelocationEntry &RE) const;
155 unsigned getAnyRelocationAddress(const macho::RelocationEntry &RE) const;
156 unsigned getAnyRelocationPCRel(const macho::RelocationEntry &RE) const;
157 unsigned getAnyRelocationLength(const macho::RelocationEntry &RE) const;
158 unsigned getAnyRelocationType(const macho::RelocationEntry &RE) const;
159 SectionRef getRelocationSection(const macho::RelocationEntry &RE) const;
161 // Walk load commands.
162 LoadCommandInfo getFirstLoadCommandInfo() const;
163 LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
165 // MachO specific structures.
166 macho::Section getSection(DataRefImpl DRI) const;
167 macho::Section64 getSection64(DataRefImpl DRI) const;
168 macho::Section getSection(const LoadCommandInfo &L, unsigned Index) const;
169 macho::Section64 getSection64(const LoadCommandInfo &L, unsigned Index) const;
170 macho::SymbolTableEntry getSymbolTableEntry(DataRefImpl DRI) const;
171 macho::Symbol64TableEntry getSymbol64TableEntry(DataRefImpl DRI) const;
173 macho::LinkeditDataLoadCommand
174 getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
175 macho::SegmentLoadCommand
176 getSegmentLoadCommand(const LoadCommandInfo &L) const;
177 macho::Segment64LoadCommand
178 getSegment64LoadCommand(const LoadCommandInfo &L) const;
179 macho::LinkerOptionsLoadCommand
180 getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
182 macho::RelocationEntry getRelocation(DataRefImpl Rel) const;
183 macho::DataInCodeTableEntry getDice(DataRefImpl Rel) const;
184 macho::Header getHeader() const;
185 macho::Header64Ext getHeader64Ext() const;
186 macho::IndirectSymbolTableEntry
187 getIndirectSymbolTableEntry(const macho::DysymtabLoadCommand &DLC,
188 unsigned Index) const;
189 macho::DataInCodeTableEntry getDataInCodeTableEntry(uint32_t DataOffset,
190 unsigned Index) const;
191 macho::SymtabLoadCommand getSymtabLoadCommand() const;
192 macho::DysymtabLoadCommand getDysymtabLoadCommand() const;
193 macho::LinkeditDataLoadCommand getDataInCodeLoadCommand() const;
195 StringRef getStringTableData() const;
196 bool is64Bit() const;
197 void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
199 static bool classof(const Binary *v) {
204 typedef SmallVector<const char*, 1> SectionList;
205 SectionList Sections;
206 const char *SymtabLoadCmd;
207 const char *DysymtabLoadCmd;
208 const char *DataInCodeLoadCmd;
212 inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
213 : DicePimpl(DiceP) , OwningObject(Owner) {}
215 inline bool DiceRef::operator==(const DiceRef &Other) const {
216 return DicePimpl == Other.DicePimpl;
219 inline bool DiceRef::operator<(const DiceRef &Other) const {
220 return DicePimpl < Other.DicePimpl;
223 inline error_code DiceRef::getNext(DiceRef &Result) const {
224 DataRefImpl Rel = DicePimpl;
225 const macho::DataInCodeTableEntry *P =
226 reinterpret_cast<const macho::DataInCodeTableEntry *>(Rel.p);
227 Rel.p = reinterpret_cast<uintptr_t>(P + 1);
228 Result = DiceRef(Rel, OwningObject);
229 return object_error::success;
232 // Since a Mach-O data in code reference, a DiceRef, can only be created when
233 // the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
234 // the methods that get the values of the fields of the reference.
236 inline error_code DiceRef::getOffset(uint32_t &Result) const {
237 const MachOObjectFile *MachOOF =
238 static_cast<const MachOObjectFile *>(OwningObject);
239 macho::DataInCodeTableEntry Dice = MachOOF->getDice(DicePimpl);
240 Result = Dice.Offset;
241 return object_error::success;
244 inline error_code DiceRef::getLength(uint16_t &Result) const {
245 const MachOObjectFile *MachOOF =
246 static_cast<const MachOObjectFile *>(OwningObject);
247 macho::DataInCodeTableEntry Dice = MachOOF->getDice(DicePimpl);
248 Result = Dice.Length;
249 return object_error::success;
252 inline error_code DiceRef::getKind(uint16_t &Result) const {
253 const MachOObjectFile *MachOOF =
254 static_cast<const MachOObjectFile *>(OwningObject);
255 macho::DataInCodeTableEntry Dice = MachOOF->getDice(DicePimpl);
257 return object_error::success;
260 inline DataRefImpl DiceRef::getRawDataRefImpl() const {
264 inline const ObjectFile *DiceRef::getObjectFile() const {