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 binds the MachOObject
11 // class to the generic ObjectFile wrapper.
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/MachOObject.h"
21 #include "llvm/Object/ObjectFile.h"
22 #include "llvm/Support/Endian.h"
23 #include "llvm/Support/MachO.h"
24 #include "llvm/Support/raw_ostream.h"
29 namespace MachOFormat {
30 template<bool is64Bits>
34 struct Section<false> {
37 support::ulittle32_t Address;
38 support::ulittle32_t Size;
39 support::ulittle32_t Offset;
40 support::ulittle32_t Align;
41 support::ulittle32_t RelocationTableOffset;
42 support::ulittle32_t NumRelocationTableEntries;
43 support::ulittle32_t Flags;
44 support::ulittle32_t Reserved1;
45 support::ulittle32_t Reserved2;
49 struct Section<true> {
52 support::ulittle64_t Address;
53 support::ulittle64_t Size;
54 support::ulittle32_t Offset;
55 support::ulittle32_t Align;
56 support::ulittle32_t RelocationTableOffset;
57 support::ulittle32_t NumRelocationTableEntries;
58 support::ulittle32_t Flags;
59 support::ulittle32_t Reserved1;
60 support::ulittle32_t Reserved2;
61 support::ulittle32_t Reserved3;
64 struct RelocationEntry {
65 support::ulittle32_t Word0;
66 support::ulittle32_t Word1;
69 template<bool is64Bits>
70 struct SymbolTableEntry;
73 struct SymbolTableEntry<false> {
74 support::ulittle32_t StringIndex;
77 support::ulittle16_t Flags;
78 support::ulittle32_t Value;
82 struct SymbolTableEntry<true> {
83 support::ulittle32_t StringIndex;
86 support::ulittle16_t Flags;
87 support::ulittle64_t Value;
91 support::ulittle32_t Type;
92 support::ulittle32_t Size;
95 struct SymtabLoadCommand {
96 support::ulittle32_t Type;
97 support::ulittle32_t Size;
98 support::ulittle32_t SymbolTableOffset;
99 support::ulittle32_t NumSymbolTableEntries;
100 support::ulittle32_t StringTableOffset;
101 support::ulittle32_t StringTableSize;
104 template<bool is64Bits>
105 struct SegmentLoadCommand;
108 struct SegmentLoadCommand<false> {
109 support::ulittle32_t Type;
110 support::ulittle32_t Size;
112 support::ulittle32_t VMAddress;
113 support::ulittle32_t VMSize;
114 support::ulittle32_t FileOffset;
115 support::ulittle32_t FileSize;
116 support::ulittle32_t MaxVMProtection;
117 support::ulittle32_t InitialVMProtection;
118 support::ulittle32_t NumSections;
119 support::ulittle32_t Flags;
123 struct SegmentLoadCommand<true> {
124 support::ulittle32_t Type;
125 support::ulittle32_t Size;
127 support::ulittle64_t VMAddress;
128 support::ulittle64_t VMSize;
129 support::ulittle64_t FileOffset;
130 support::ulittle64_t FileSize;
131 support::ulittle32_t MaxVMProtection;
132 support::ulittle32_t InitialVMProtection;
133 support::ulittle32_t NumSections;
134 support::ulittle32_t Flags;
137 struct LinkeditDataLoadCommand {
138 support::ulittle32_t Type;
139 support::ulittle32_t Size;
140 support::ulittle32_t DataOffset;
141 support::ulittle32_t DataSize;
145 support::ulittle32_t Magic;
146 support::ulittle32_t CPUType;
147 support::ulittle32_t CPUSubtype;
148 support::ulittle32_t FileType;
149 support::ulittle32_t NumLoadCommands;
150 support::ulittle32_t SizeOfLoadCommands;
151 support::ulittle32_t Flags;
155 class MachOObjectFile : public ObjectFile {
157 MachOObjectFile(MemoryBuffer *Object, bool Is64bits, error_code &ec);
159 virtual symbol_iterator begin_symbols() const;
160 virtual symbol_iterator end_symbols() const;
161 virtual symbol_iterator begin_dynamic_symbols() const;
162 virtual symbol_iterator end_dynamic_symbols() const;
163 virtual library_iterator begin_libraries_needed() const;
164 virtual library_iterator end_libraries_needed() const;
165 virtual section_iterator begin_sections() const;
166 virtual section_iterator end_sections() const;
168 virtual uint8_t getBytesInAddress() const;
169 virtual StringRef getFileFormatName() const;
170 virtual unsigned getArch() const;
171 virtual StringRef getLoadName() const;
173 // In a MachO file, sections have a segment name. This is used in the .o
174 // files. They have a single segment, but this field specifies which segment
175 // a section should be put in in the final object.
176 StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
178 // Names are stored as 16 bytes. These returns the raw 16 bytes without
179 // interpreting them as a C string.
180 ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
181 ArrayRef<char>getSectionRawFinalSegmentName(DataRefImpl Sec) const;
183 const MachOFormat::Section<true> *getSection64(DataRefImpl DRI) const;
184 const MachOFormat::Section<false> *getSection(DataRefImpl DRI) const;
185 const MachOFormat::SymbolTableEntry<true> *
186 getSymbol64TableEntry(DataRefImpl DRI) const;
187 const MachOFormat::SymbolTableEntry<false> *
188 getSymbolTableEntry(DataRefImpl DRI) const;
189 bool is64Bit() const;
190 const MachOFormat::LoadCommand *getLoadCommandInfo(unsigned Index) const;
191 void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
192 const MachOFormat::Header *getHeader() const;
193 unsigned getHeaderSize() const;
194 StringRef getData(size_t Offset, size_t Size) const;
196 static inline bool classof(const Binary *v) {
201 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
202 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
203 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
204 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
205 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
206 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
207 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
208 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
209 virtual error_code getSymbolSection(DataRefImpl Symb,
210 section_iterator &Res) const;
211 virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
213 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
214 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
215 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
216 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
217 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
218 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
219 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
220 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
221 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
222 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
224 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
225 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
226 virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const;
227 virtual error_code sectionContainsSymbol(DataRefImpl DRI, DataRefImpl S,
229 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
230 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
232 virtual error_code getRelocationNext(DataRefImpl Rel,
233 RelocationRef &Res) const;
234 virtual error_code getRelocationAddress(DataRefImpl Rel,
235 uint64_t &Res) const;
236 virtual error_code getRelocationOffset(DataRefImpl Rel,
237 uint64_t &Res) const;
238 virtual error_code getRelocationSymbol(DataRefImpl Rel,
239 SymbolRef &Res) const;
240 virtual error_code getRelocationType(DataRefImpl Rel,
241 uint64_t &Res) const;
242 virtual error_code getRelocationTypeName(DataRefImpl Rel,
243 SmallVectorImpl<char> &Result) const;
244 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
246 virtual error_code getRelocationValueString(DataRefImpl Rel,
247 SmallVectorImpl<char> &Result) const;
248 virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const;
250 virtual error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const;
251 virtual error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const;
254 typedef SmallVector<DataRefImpl, 1> SectionList;
255 SectionList Sections;
258 void moveToNextSection(DataRefImpl &DRI) const;
260 const MachOFormat::SymbolTableEntry<false> *
261 getSymbolTableEntry(DataRefImpl DRI,
262 const MachOFormat::SymtabLoadCommand *SymtabLoadCmd) const;
264 const MachOFormat::SymbolTableEntry<true> *
265 getSymbol64TableEntry(DataRefImpl DRI,
266 const MachOFormat::SymtabLoadCommand *SymtabLoadCmd) const;
268 void moveToNextSymbol(DataRefImpl &DRI) const;
269 const MachOFormat::RelocationEntry *getRelocation(DataRefImpl Rel) const;
270 std::size_t getSectionIndex(DataRefImpl Sec) const;
272 void printRelocationTargetName(const MachOFormat::RelocationEntry *RE,
273 raw_string_ostream &fmt) const;