1 /* 2 Copyright (C) 2001-present by Serge Lamikhov-Center 3 4 Permission is hereby granted, free of charge, to any person obtaining a copy 5 of this software and associated documentation files (the "Software"), to deal 6 in the Software without restriction, including without limitation the rights 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 copies of the Software, and to permit persons to whom the Software is 9 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 FROM, 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 THE SOFTWARE. 21 */ 22 23 #ifndef ELFIO_ARRAY_HPP 24 #define ELFIO_ARRAY_HPP 25 26 #include <algorithm> 27 28 namespace ELFIO { 29 30 //------------------------------------------------------------------------------ 31 template <class S> class array_section_accessor_template 32 { 33 public: 34 //------------------------------------------------------------------------------ array_section_accessor_template(const elfio & elf_file,S * section)35 array_section_accessor_template( const elfio& elf_file, S* section ) 36 : elf_file( elf_file ), array_section( section ) 37 { 38 } 39 40 //------------------------------------------------------------------------------ get_entries_num() const41 Elf_Xword get_entries_num() const 42 { 43 Elf_Xword entry_size = elf_file.get_class() == ELFCLASS32 44 ? sizeof( Elf32_Addr ) 45 : sizeof( Elf64_Addr ); 46 return array_section->get_size() / entry_size; 47 } 48 49 //------------------------------------------------------------------------------ get_entry(Elf_Xword index,Elf64_Addr & address) const50 bool get_entry( Elf_Xword index, Elf64_Addr& address ) const 51 { 52 if ( index >= get_entries_num() ) { // Is index valid 53 return false; 54 } 55 56 if ( elf_file.get_class() == ELFCLASS32 ) { 57 generic_get_entry_arr<Elf32_Addr>( index, address ); 58 } 59 else { 60 generic_get_entry_arr<Elf64_Addr>( index, address ); 61 } 62 63 return true; 64 } 65 66 //------------------------------------------------------------------------------ add_entry(Elf64_Addr address)67 void add_entry( Elf64_Addr address ) 68 { 69 if ( elf_file.get_class() == ELFCLASS32 ) { 70 generic_add_entry_arr<Elf32_Addr>( address ); 71 } 72 else { 73 generic_add_entry_arr<Elf64_Addr>( address ); 74 } 75 } 76 77 private: 78 //------------------------------------------------------------------------------ 79 template <class T> generic_get_entry_arr(Elf_Xword index,Elf64_Addr & address) const80 void generic_get_entry_arr( Elf_Xword index, Elf64_Addr& address ) const 81 { 82 const endianess_convertor& convertor = elf_file.get_convertor(); 83 84 const T temp = *reinterpret_cast<const T*>( array_section->get_data() + 85 index * sizeof( T ) ); 86 address = convertor( temp ); 87 } 88 89 //------------------------------------------------------------------------------ generic_add_entry_arr(Elf64_Addr address)90 template <class T> void generic_add_entry_arr( Elf64_Addr address ) 91 { 92 const endianess_convertor& convertor = elf_file.get_convertor(); 93 94 T temp = convertor( (T)address ); 95 array_section->append_data( reinterpret_cast<char*>( &temp ), 96 sizeof( temp ) ); 97 } 98 99 //------------------------------------------------------------------------------ 100 private: 101 const elfio& elf_file; 102 S* array_section; 103 }; 104 105 using array_section_accessor = array_section_accessor_template<section>; 106 using const_array_section_accessor = 107 array_section_accessor_template<const section>; 108 109 } // namespace ELFIO 110 111 #endif // ELFIO_ARRAY_HPP 112