1//------------------------------------------------------------------------------ 2// Copyright (c) 2003, Ingo Weinhold 3// 4// Permission is hereby granted, free of charge, to any person obtaining a 5// copy of this software and associated documentation files (the "Software"), 6// to deal in the Software without restriction, including without limitation 7// the rights to use, copy, modify, merge, publish, distribute, sublicense, 8// and/or sell copies of the Software, and to permit persons to whom the 9// Software is furnished to do so, subject to the following conditions: 10// 11// The above copyright notice and this permission notice shall be included in 12// all copies or substantial portions of the Software. 13// 14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20// DEALINGS IN THE SOFTWARE. 21// 22// File Name: ElfFile.h 23// Author: Ingo Weinhold (bonefish@users.sf.net) 24// Description: Interface declarations of classes for accessing ELF file, 25// or more precisely for iterating through their relocation 26// sections. 27//------------------------------------------------------------------------------ 28 29#ifndef ELF_FILE_H 30#define ELF_FILE_H 31 32#include <File.h> 33#include <image.h> 34 35#include "Elf.h" 36 37 38namespace SymbolPatcher { 39 40class ElfFile; 41class ElfSection; 42 43// ElfSymbol 44class ElfSymbol { 45public: 46 ElfSymbol(ElfSection* section = NULL, 47 int32 index = -1); 48 ~ElfSymbol(); 49 50 void SetTo(ElfSection* section, int32 index); 51 void Unset(); 52 53 const Elf_Sym* GetSymbolStruct(); 54 const char* GetName(); 55 uint32 GetBinding(); 56 uint32 GetType(); 57 uint32 GetTargetSectionIndex(); 58 59private: 60 ElfSection* fSection; 61 int32 fIndex; 62 Elf_Sym* fSymbol; 63}; 64 65// ElfRelocation 66class ElfRelocation { 67public: 68 ElfRelocation(ElfSection* section = NULL, 69 int32 index = -1); 70 ~ElfRelocation(); 71 72 void SetTo(ElfSection* section, int32 index); 73 void Unset(); 74 75 Elf_Rel* GetRelocationStruct(); 76 uint32 GetType(); 77 uint32 GetSymbolIndex(); 78 Elf_Addr GetOffset(); 79 status_t GetSymbol(ElfSymbol* symbol); 80 81private: 82 ElfSection* fSection; 83 int32 fIndex; 84 Elf_Rel* fRelocation; 85}; 86 87// ElfRelocationIterator 88class ElfRelocationIterator { 89public: 90 ElfRelocationIterator(ElfFile* file); 91 ~ElfRelocationIterator(); 92 93 bool GetNext(ElfRelocation* relocation); 94 95private: 96 ElfSection* _FindNextSection(); 97 98private: 99 ElfFile* fFile; 100 int32 fSectionIndex; 101 int32 fEntryIndex; 102}; 103 104// ElfFile 105class ElfFile { 106public: 107 ElfFile(); 108 ~ElfFile(); 109 status_t SetTo(const char *filename); 110 void Unset(); 111 void Unload(); 112 113 BFile* GetFile() { return &fFile; } 114 115 const char* GetSectionHeaderStrings(size_t* size); 116 const char* GetStringSectionStrings(int32 index, 117 size_t* size); 118 119 int32 CountSections() const { return fSectionCount; } 120 ElfSection* SectionAt(int32 index, bool load = false); 121 122 void Dump(); 123 124private: 125 status_t _SetTo(const char *filename); 126 127 Elf_Shdr* _SectionHeaderAt(int32 index); 128 129 status_t _LoadSection(int32 index); 130 131private: 132 BFile fFile; 133 Elf_Ehdr fHeader; 134 uint8* fSectionHeaders; 135 ElfSection* fSections; 136 int32 fSectionCount; 137 size_t fSectionHeaderSize; 138}; 139 140} // namespace SymbolPatcher 141 142using namespace SymbolPatcher; 143 144 145#endif // ELF_FILE_H 146