1 //===- COFF.h - COFF object file implementation -----------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the COFFObjectFile class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_OBJECT_COFF_H 15 #define LLVM_OBJECT_COFF_H 16 17 #include "llvm/Object/ObjectFile.h" 18 #include "llvm/Support/COFF.h" 19 #include "llvm/Support/Endian.h" 20 21 namespace llvm { 22 template <typename T> 23 class ArrayRef; 24 25 namespace object { 26 27 struct coff_file_header { 28 support::ulittle16_t Machine; 29 support::ulittle16_t NumberOfSections; 30 support::ulittle32_t TimeDateStamp; 31 support::ulittle32_t PointerToSymbolTable; 32 support::ulittle32_t NumberOfSymbols; 33 support::ulittle16_t SizeOfOptionalHeader; 34 support::ulittle16_t Characteristics; 35 }; 36 37 struct coff_symbol { 38 struct StringTableOffset { 39 support::ulittle32_t Zeroes; 40 support::ulittle32_t Offset; 41 }; 42 43 union { 44 char ShortName[8]; 45 StringTableOffset Offset; 46 } Name; 47 48 support::ulittle32_t Value; 49 support::little16_t SectionNumber; 50 51 support::ulittle16_t Type; 52 53 support::ulittle8_t StorageClass; 54 support::ulittle8_t NumberOfAuxSymbols; 55 56 uint8_t getBaseType() const { 57 return Type & 0x0F; 58 } 59 60 uint8_t getComplexType() const { 61 return (Type & 0xF0) >> 4; 62 } 63 }; 64 65 struct coff_section { 66 char Name[8]; 67 support::ulittle32_t VirtualSize; 68 support::ulittle32_t VirtualAddress; 69 support::ulittle32_t SizeOfRawData; 70 support::ulittle32_t PointerToRawData; 71 support::ulittle32_t PointerToRelocations; 72 support::ulittle32_t PointerToLinenumbers; 73 support::ulittle16_t NumberOfRelocations; 74 support::ulittle16_t NumberOfLinenumbers; 75 support::ulittle32_t Characteristics; 76 }; 77 78 struct coff_relocation { 79 support::ulittle32_t VirtualAddress; 80 support::ulittle32_t SymbolTableIndex; 81 support::ulittle16_t Type; 82 }; 83 84 struct coff_aux_section_definition { 85 support::ulittle32_t Length; 86 support::ulittle16_t NumberOfRelocations; 87 support::ulittle16_t NumberOfLinenumbers; 88 support::ulittle32_t CheckSum; 89 support::ulittle16_t Number; 90 support::ulittle8_t Selection; 91 char Unused[3]; 92 }; 93 94 class COFFObjectFile : public ObjectFile { 95 private: 96 const coff_file_header *Header; 97 const coff_section *SectionTable; 98 const coff_symbol *SymbolTable; 99 const char *StringTable; 100 uint32_t StringTableSize; 101 102 error_code getString(uint32_t offset, StringRef &Res) const; 103 104 const coff_symbol *toSymb(DataRefImpl Symb) const; 105 const coff_section *toSec(DataRefImpl Sec) const; 106 const coff_relocation *toRel(DataRefImpl Rel) const; 107 108 protected: 109 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const; 110 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const; 111 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const; 112 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const; 113 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const; 114 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const; 115 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const; 116 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const; 117 virtual error_code getSymbolSection(DataRefImpl Symb, 118 section_iterator &Res) const; 119 virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const; 120 121 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const; 122 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const; 123 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const; 124 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const; 125 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const; 126 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const; 127 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const; 128 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const; 129 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const; 130 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const; 131 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const; 132 virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const; 133 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec, 134 bool &Res) const; 135 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb, 136 bool &Result) const; 137 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const; 138 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const; 139 140 virtual error_code getRelocationNext(DataRefImpl Rel, 141 RelocationRef &Res) const; 142 virtual error_code getRelocationAddress(DataRefImpl Rel, 143 uint64_t &Res) const; 144 virtual error_code getRelocationOffset(DataRefImpl Rel, 145 uint64_t &Res) const; 146 virtual error_code getRelocationSymbol(DataRefImpl Rel, 147 SymbolRef &Res) const; 148 virtual error_code getRelocationType(DataRefImpl Rel, 149 uint64_t &Res) const; 150 virtual error_code getRelocationTypeName(DataRefImpl Rel, 151 SmallVectorImpl<char> &Result) const; 152 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel, 153 int64_t &Res) const; 154 virtual error_code getRelocationValueString(DataRefImpl Rel, 155 SmallVectorImpl<char> &Result) const; 156 157 virtual error_code getLibraryNext(DataRefImpl LibData, 158 LibraryRef &Result) const; 159 virtual error_code getLibraryPath(DataRefImpl LibData, 160 StringRef &Result) const; 161 162 public: 163 COFFObjectFile(MemoryBuffer *Object, error_code &ec); 164 virtual symbol_iterator begin_symbols() const; 165 virtual symbol_iterator end_symbols() const; 166 virtual symbol_iterator begin_dynamic_symbols() const; 167 virtual symbol_iterator end_dynamic_symbols() const; 168 virtual library_iterator begin_libraries_needed() const; 169 virtual library_iterator end_libraries_needed() const; 170 virtual section_iterator begin_sections() const; 171 virtual section_iterator end_sections() const; 172 173 const coff_section *getCOFFSection(section_iterator &It) const; 174 const coff_symbol *getCOFFSymbol(symbol_iterator &It) const; 175 const coff_relocation *getCOFFRelocation(relocation_iterator &It) const; 176 177 virtual uint8_t getBytesInAddress() const; 178 virtual StringRef getFileFormatName() const; 179 virtual unsigned getArch() const; 180 virtual StringRef getLoadName() const; 181 182 error_code getHeader(const coff_file_header *&Res) const; 183 error_code getSection(int32_t index, const coff_section *&Res) const; 184 error_code getSymbol(uint32_t index, const coff_symbol *&Res) const; 185 template <typename T> 186 error_code getAuxSymbol(uint32_t index, const T *&Res) const { 187 const coff_symbol *s; 188 error_code ec = getSymbol(index, s); 189 Res = reinterpret_cast<const T*>(s); 190 return ec; 191 } 192 error_code getSymbolName(const coff_symbol *symbol, StringRef &Res) const; 193 ArrayRef<uint8_t> getSymbolAuxData(const coff_symbol *symbol) const; 194 195 error_code getSectionName(const coff_section *Sec, StringRef &Res) const; 196 error_code getSectionContents(const coff_section *Sec, 197 ArrayRef<uint8_t> &Res) const; 198 199 static inline bool classof(const Binary *v) { 200 return v->isCOFF(); 201 } 202 }; 203 204 } 205 } 206 207 #endif 208
