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 class ElfFile; 38 class ElfSection; 39 40 // ElfSymbol 41 class ElfSymbol { 42 public: 43 ElfSymbol(ElfSection* section = NULL, 44 int32 index = -1); 45 ~ElfSymbol(); 46 47 void SetTo(ElfSection* section, int32 index); 48 void Unset(); 49 50 const Elf32_Sym* GetSymbolStruct(); 51 const char* GetName(); 52 uint32 GetBinding(); 53 uint32 GetType(); 54 uint32 GetTargetSectionIndex(); 55 56 private: 57 ElfSection* fSection; 58 int32 fIndex; 59 Elf32_Sym* fSymbol; 60 }; 61 62 // ElfRelocation 63 class ElfRelocation { 64 public: 65 ElfRelocation(ElfSection* section = NULL, 66 int32 index = -1); 67 ~ElfRelocation(); 68 69 void SetTo(ElfSection* section, int32 index); 70 void Unset(); 71 72 Elf32_Rel* GetRelocationStruct(); 73 uint32 GetType(); 74 uint32 GetSymbolIndex(); 75 Elf32_Addr GetOffset(); 76 status_t GetSymbol(ElfSymbol* symbol); 77 78 private: 79 ElfSection* fSection; 80 int32 fIndex; 81 Elf32_Rel* fRelocation; 82 }; 83 84 // ElfRelocationIterator 85 class ElfRelocationIterator { 86 public: 87 ElfRelocationIterator(ElfFile* file); 88 ~ElfRelocationIterator(); 89 90 bool GetNext(ElfRelocation* relocation); 91 92 private: 93 ElfSection* _FindNextSection(); 94 95 private: 96 ElfFile* fFile; 97 int32 fSectionIndex; 98 int32 fEntryIndex; 99 }; 100 101 // ElfFile 102 class ElfFile { 103 public: 104 ElfFile(); 105 ~ElfFile(); 106 status_t SetTo(const char *filename); 107 void Unset(); 108 void Unload(); 109 110 BFile* GetFile() { return &fFile; } 111 112 const char* GetSectionHeaderStrings(size_t* size); 113 const char* GetStringSectionStrings(int32 index, 114 size_t* size); 115 116 int32 CountSections() const { return fSectionCount; } 117 ElfSection* SectionAt(int32 index, bool load = false); 118 119 void Dump(); 120 121 private: 122 status_t _SetTo(const char *filename); 123 124 Elf32_Shdr* _SectionHeaderAt(int32 index); 125 126 status_t _LoadSection(int32 index); 127 128 private: 129 BFile fFile; 130 Elf32_Ehdr fHeader; 131 uint8* fSectionHeaders; 132 ElfSection* fSections; 133 int32 fSectionCount; 134 size_t fSectionHeaderSize; 135 }; 136 137 #endif // ELF_FILE_H 138