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;
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 void moveSymbolNext(DataRefImpl &Symb) const LLVM_OVERRIDE;
63 error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const
65 error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const
67 error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const
69 error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const
71 error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const LLVM_OVERRIDE;
72 error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const
74 error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const
76 error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const
78 error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const
81 void moveSectionNext(DataRefImpl &Sec) const LLVM_OVERRIDE;
82 error_code getSectionName(DataRefImpl Sec, StringRef &Res) const
84 error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const
86 error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const LLVM_OVERRIDE;
87 error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const
89 error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const
91 error_code isSectionText(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
92 error_code isSectionData(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
93 error_code isSectionBSS(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
94 error_code isSectionRequiredForExecution(DataRefImpl Sec, bool &Res) const
96 error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
97 error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
98 error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const
100 error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
101 bool &Result) const LLVM_OVERRIDE;
102 relocation_iterator section_rel_begin(DataRefImpl Sec) const LLVM_OVERRIDE;
103 relocation_iterator section_rel_end(DataRefImpl Sec) const LLVM_OVERRIDE;
105 void moveRelocationNext(DataRefImpl &Rel) const LLVM_OVERRIDE;
106 error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const
108 error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const
110 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const LLVM_OVERRIDE;
111 error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const
113 error_code getRelocationTypeName(DataRefImpl Rel,
114 SmallVectorImpl<char> &Result) const
116 error_code getRelocationValueString(DataRefImpl Rel,
117 SmallVectorImpl<char> &Result) const
119 error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const
122 error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const
124 error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const
127 // TODO: Would be useful to have an iterator based version
128 // of the load command interface too.
130 symbol_iterator begin_symbols() const LLVM_OVERRIDE;
131 symbol_iterator end_symbols() const LLVM_OVERRIDE;
133 symbol_iterator begin_dynamic_symbols() const LLVM_OVERRIDE;
134 symbol_iterator end_dynamic_symbols() const LLVM_OVERRIDE;
136 section_iterator begin_sections() const LLVM_OVERRIDE;
137 section_iterator end_sections() const LLVM_OVERRIDE;
139 library_iterator begin_libraries_needed() const LLVM_OVERRIDE;
140 library_iterator end_libraries_needed() const LLVM_OVERRIDE;
142 uint8_t getBytesInAddress() const LLVM_OVERRIDE;
144 StringRef getFileFormatName() const LLVM_OVERRIDE;
145 unsigned getArch() const LLVM_OVERRIDE;
147 StringRef getLoadName() const LLVM_OVERRIDE;
149 relocation_iterator section_rel_begin(unsigned Index) const;
150 relocation_iterator section_rel_end(unsigned Index) const;
152 dice_iterator begin_dices() const;
153 dice_iterator end_dices() const;
155 // In a MachO file, sections have a segment name. This is used in the .o
156 // files. They have a single segment, but this field specifies which segment
157 // a section should be put in in the final object.
158 StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
160 // Names are stored as 16 bytes. These returns the raw 16 bytes without
161 // interpreting them as a C string.
162 ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
163 ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
165 // MachO specific Info about relocations.
166 bool isRelocationScattered(const MachO::any_relocation_info &RE) const;
167 unsigned getPlainRelocationSymbolNum(
168 const MachO::any_relocation_info &RE) const;
169 bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const;
170 bool getScatteredRelocationScattered(
171 const MachO::any_relocation_info &RE) const;
172 uint32_t getScatteredRelocationValue(
173 const MachO::any_relocation_info &RE) const;
174 unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const;
175 unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
176 unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
177 unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
178 SectionRef getRelocationSection(const MachO::any_relocation_info &RE) const;
180 // Walk load commands.
181 LoadCommandInfo getFirstLoadCommandInfo() const;
182 LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
184 // MachO specific structures.
185 MachO::section getSection(DataRefImpl DRI) const;
186 MachO::section_64 getSection64(DataRefImpl DRI) const;
187 MachO::section getSection(const LoadCommandInfo &L, unsigned Index) const;
188 MachO::section_64 getSection64(const LoadCommandInfo &L,unsigned Index) const;
189 MachO::nlist getSymbolTableEntry(DataRefImpl DRI) const;
190 MachO::nlist_64 getSymbol64TableEntry(DataRefImpl DRI) const;
192 MachO::linkedit_data_command
193 getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
194 MachO::segment_command
195 getSegmentLoadCommand(const LoadCommandInfo &L) const;
196 MachO::segment_command_64
197 getSegment64LoadCommand(const LoadCommandInfo &L) const;
198 MachO::linker_options_command
199 getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
201 MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
202 MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
203 MachO::mach_header getHeader() const;
204 MachO::mach_header_64 getHeader64() const;
206 getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC,
207 unsigned Index) const;
208 MachO::data_in_code_entry getDataInCodeTableEntry(uint32_t DataOffset,
209 unsigned Index) const;
210 MachO::symtab_command getSymtabLoadCommand() const;
211 MachO::dysymtab_command getDysymtabLoadCommand() const;
212 MachO::linkedit_data_command getDataInCodeLoadCommand() const;
214 StringRef getStringTableData() const;
215 bool is64Bit() const;
216 void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
218 static Triple::ArchType getArch(uint32_t CPUType);
220 static bool classof(const Binary *v) {
225 typedef SmallVector<const char*, 1> SectionList;
226 SectionList Sections;
227 const char *SymtabLoadCmd;
228 const char *DysymtabLoadCmd;
229 const char *DataInCodeLoadCmd;
233 inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
234 : DicePimpl(DiceP) , OwningObject(Owner) {}
236 inline bool DiceRef::operator==(const DiceRef &Other) const {
237 return DicePimpl == Other.DicePimpl;
240 inline bool DiceRef::operator<(const DiceRef &Other) const {
241 return DicePimpl < Other.DicePimpl;
244 inline void DiceRef::moveNext() {
245 const MachO::data_in_code_entry *P =
246 reinterpret_cast<const MachO::data_in_code_entry *>(DicePimpl.p);
247 DicePimpl.p = reinterpret_cast<uintptr_t>(P + 1);
250 // Since a Mach-O data in code reference, a DiceRef, can only be created when
251 // the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
252 // the methods that get the values of the fields of the reference.
254 inline error_code DiceRef::getOffset(uint32_t &Result) const {
255 const MachOObjectFile *MachOOF =
256 static_cast<const MachOObjectFile *>(OwningObject);
257 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
258 Result = Dice.offset;
259 return object_error::success;
262 inline error_code DiceRef::getLength(uint16_t &Result) const {
263 const MachOObjectFile *MachOOF =
264 static_cast<const MachOObjectFile *>(OwningObject);
265 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
266 Result = Dice.length;
267 return object_error::success;
270 inline error_code DiceRef::getKind(uint16_t &Result) const {
271 const MachOObjectFile *MachOOF =
272 static_cast<const MachOObjectFile *>(OwningObject);
273 MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
275 return object_error::success;
278 inline DataRefImpl DiceRef::getRawDataRefImpl() const {
282 inline const ObjectFile *DiceRef::getObjectFile() const {