1 | /* |
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2 | This file is part of Libelfpp. |
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3 | |
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4 | Libelfpp is free software: you can redistribute it and/or modify |
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5 | it under the terms of the GNU Lesser General Public License as |
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6 | published by the Free Software Foundation, either version 3 of the |
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7 | License, or (at your option) any later version. |
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8 | |
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9 | Libelfpp is distributed in the hope that it will be useful, but |
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10 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | General Public License for more details. |
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13 | |
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14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with Libelfpp. If not, see |
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16 | <http://www.gnu.org/licenses/>. |
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17 | |
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18 | Copyright (c) Alexandre Becoulet <alexandre.becoulet@free.fr> |
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19 | */ |
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20 | |
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21 | #ifndef ELFPP_OBJECT_HH_ |
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22 | #define ELFPP_OBJECT_HH_ |
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23 | |
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24 | #include <string> |
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25 | #include <vector> |
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26 | |
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27 | #include <dpp/linked_list> |
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28 | |
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29 | #include "elfpp.hh" |
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30 | #include "elfpp_bits.hh" |
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31 | |
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32 | namespace elfpp |
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33 | { |
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34 | class section; |
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35 | class symbol; |
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36 | class elf_access; |
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37 | template <typename bits_t, int width> class elfn_access; |
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38 | |
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39 | /** |
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40 | @short ELF object file class |
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41 | @header elfpp/object |
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42 | */ |
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43 | class object |
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44 | { |
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45 | template <typename, int> friend class elfn_access; |
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46 | friend class section; |
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47 | public: |
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48 | |
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49 | /** Create an empty elf object */ |
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50 | object(e_machine_e machine, |
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51 | ei_class_e word_width = ELFCLASSNONE, |
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52 | ei_data_e byte_order = ELFDATANONE); |
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53 | |
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54 | /** Create a new elf object and load sections from file. */ |
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55 | object(const std::string &filename); |
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56 | |
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57 | /** Create a new elf object */ |
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58 | object(); |
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59 | |
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60 | /** Copy all header fields of obj and set the access_ variable*/ |
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61 | void copy_info(object& obj, size_t word_width = 0); |
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62 | |
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63 | ~object(); |
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64 | |
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65 | /** |
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66 | Parse symbol and relocation tables sections and create |
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67 | associated object representation. Parsed table sections are |
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68 | discarded and will be regenerated when writing elf file. |
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69 | */ |
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70 | void parse_symbol_table(); |
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71 | |
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72 | /** |
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73 | @this creates symbols for all area not covered by a symbol in |
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74 | allocatable sections. |
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75 | */ |
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76 | void create_orphan_symbols(); |
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77 | |
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78 | /** |
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79 | @this loads symbol data from section content to symbol content |
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80 | storage. |
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81 | */ |
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82 | void load_symbol_data(); |
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83 | |
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84 | /** |
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85 | @this update all relocations to be relative to mangled |
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86 | symbols. Sections will be updated from symbol content when |
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87 | writing elf file. |
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88 | */ |
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89 | void set_relative_relocs(); |
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90 | |
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91 | /** Add a new section to object. */ |
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92 | void add_section(section &sec); |
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93 | |
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94 | /** Remove a section from object. */ |
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95 | void remove_section(section &sec); |
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96 | |
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97 | /** Get first section with given name. */ |
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98 | section & get_section(const std::string &name); |
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99 | |
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100 | /** Return section table container. */ |
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101 | inline dpp::linked_list<section> & get_section_table(); |
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102 | |
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103 | /** Add a new segment to object. */ |
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104 | void add_segment(segment &seg); |
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105 | |
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106 | /** Return section table container. */ |
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107 | inline dpp::linked_list<segment> & get_segment_table(); |
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108 | |
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109 | /** Add a new symbol to object. Symbol must be stored per |
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110 | section. Only symbol without associated section must be added |
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111 | to object. */ |
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112 | void add_symbol(symbol &sym); |
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113 | |
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114 | /** Remove a section independent symbol from object. */ |
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115 | void remove_symbol(symbol &sym); |
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116 | |
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117 | /** Get section independent symbol by name. */ |
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118 | inline symbol & get_symbol(const std::string &name); |
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119 | |
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120 | /** Get section independent symbols table. */ |
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121 | inline const sym_tab_map_t & get_symbol_table() const; |
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122 | |
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123 | /** Write elf object to file. Symbol and relocation table may be |
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124 | generated from object representation if available. Sections |
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125 | content are updated with symbols content. */ |
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126 | void write(const std::string &filename); |
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127 | |
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128 | e_machine_e get_machine(); |
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129 | ei_class_e get_word_width(); |
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130 | ei_data_e get_byteorder(); |
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131 | |
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132 | private: |
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133 | |
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134 | void set_relative_relocs(symbol *sym); |
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135 | |
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136 | static ei_class_e get_word_width(e_machine_e machine); |
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137 | static ei_data_e get_byte_order(e_machine_e machine); |
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138 | |
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139 | dpp::linked_list<section> section_tab_; |
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140 | dpp::linked_list<segment> segment_tab_; |
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141 | |
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142 | ei_class_e word_width_; |
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143 | ei_data_e byteorder_; |
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144 | ei_osabi_e os_abi_; |
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145 | uint8_t abi_ver_; |
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146 | e_type_e type_; |
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147 | e_machine_e machine_; |
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148 | |
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149 | elf_access *access_; |
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150 | |
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151 | bool rel_with_addend_; |
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152 | bool generate_symtab_; |
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153 | std::vector<section *> secidx_; |
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154 | std::vector<symbol *> symidx_; |
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155 | uint64_t entry_; |
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156 | unsigned int flags_; |
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157 | sym_tab_map_t sym_tab_; |
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158 | }; |
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159 | |
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160 | } |
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161 | |
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162 | #endif |
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163 | |
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