1 | /* |
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2 | * Copyright (c) 2011, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | /** |
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17 | * @file |
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18 | * |
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19 | * @ingroup rtems-ld |
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20 | * |
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21 | * @brief RTEMS Linker symbols manages the symbols from all the object files. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include <string.h> |
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26 | |
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27 | #include <iomanip> |
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28 | |
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29 | #include <rld.h> |
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30 | |
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31 | #include <libiberty/demangle.h> |
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32 | |
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33 | namespace rld |
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34 | { |
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35 | namespace symbols |
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36 | { |
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37 | /** |
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38 | * Get the demangled name. |
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39 | */ |
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40 | bool |
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41 | demangle_name (const std::string& name, std::string& demangled) |
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42 | { |
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43 | bool yes = false; |
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44 | if (name.length() == 0) |
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45 | demangled = name; |
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46 | else |
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47 | { |
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48 | std::string wrapper = "_GLOBAL__sub_I_"; |
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49 | size_t offset = 0; |
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50 | if (name.compare (0, wrapper.length (), wrapper) == 0) |
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51 | offset = wrapper.length (); |
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52 | char* demangled_name = ::cplus_demangle (name.c_str () + offset, |
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53 | DMGL_ANSI | DMGL_PARAMS); |
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54 | if (demangled_name) |
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55 | { |
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56 | demangled = demangled_name; |
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57 | ::free (demangled_name); |
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58 | yes = true; |
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59 | } |
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60 | } |
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61 | return yes; |
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62 | } |
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63 | |
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64 | bool |
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65 | is_cplusplus (const std::string& name) |
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66 | { |
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67 | std::string demangled; |
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68 | return symbols::demangle_name (name, demangled); |
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69 | } |
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70 | |
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71 | symbol::symbol () |
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72 | : index_ (-1), |
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73 | object_ (0), |
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74 | references_ (0) |
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75 | { |
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76 | memset (&esym_, 0, sizeof (esym_)); |
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77 | } |
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78 | |
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79 | symbol::symbol (int index, |
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80 | const std::string& name, |
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81 | files::object& object, |
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82 | const elf::elf_sym& esym) |
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83 | : index_ (index), |
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84 | name_ (name), |
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85 | object_ (&object), |
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86 | esym_ (esym), |
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87 | references_ (0) |
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88 | { |
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89 | if (!object_) |
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90 | throw rld_error_at ("object pointer is 0"); |
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91 | demangle_name (name_, demangled_); |
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92 | } |
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93 | |
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94 | symbol::symbol (int index, |
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95 | const std::string& name, |
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96 | const elf::elf_sym& esym) |
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97 | : index_ (index), |
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98 | name_ (name), |
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99 | object_ (0), |
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100 | esym_ (esym), |
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101 | references_ (0) |
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102 | { |
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103 | demangle_name (name_, demangled_); |
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104 | } |
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105 | |
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106 | symbol::symbol (const std::string& name, |
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107 | const elf::elf_addr value) |
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108 | : index_ (-1), |
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109 | name_ (name), |
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110 | object_ (0), |
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111 | references_ (0) |
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112 | { |
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113 | memset (&esym_, 0, sizeof (esym_)); |
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114 | esym_.st_value = value; |
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115 | } |
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116 | |
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117 | symbol::symbol (const char* name, |
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118 | const elf::elf_addr value) |
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119 | : index_ (-1), |
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120 | name_ (name), |
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121 | object_ (0), |
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122 | references_ (0) |
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123 | { |
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124 | memset (&esym_, 0, sizeof (esym_)); |
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125 | esym_.st_value = value; |
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126 | } |
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127 | |
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128 | int |
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129 | symbol::index () const |
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130 | { |
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131 | return index_; |
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132 | } |
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133 | |
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134 | const std::string& |
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135 | symbol::name () const |
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136 | { |
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137 | return name_; |
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138 | } |
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139 | |
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140 | const std::string& |
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141 | symbol::demangled () const |
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142 | { |
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143 | return demangled_; |
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144 | } |
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145 | |
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146 | bool |
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147 | symbol::is_cplusplus () const |
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148 | { |
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149 | return symbols::is_cplusplus (name_); |
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150 | } |
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151 | |
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152 | bool |
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153 | symbol::is_local () const |
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154 | { |
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155 | return binding () == STB_LOCAL; |
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156 | } |
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157 | |
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158 | bool |
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159 | symbol::is_weak () const |
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160 | { |
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161 | return binding () == STB_WEAK; |
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162 | } |
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163 | |
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164 | bool |
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165 | symbol::is_global () const |
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166 | { |
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167 | return binding () == STB_GLOBAL; |
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168 | } |
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169 | |
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170 | int |
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171 | symbol::type () const |
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172 | { |
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173 | return GELF_ST_TYPE (esym_.st_info); |
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174 | } |
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175 | |
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176 | int |
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177 | symbol::binding () const |
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178 | { |
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179 | return GELF_ST_BIND (esym_.st_info); |
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180 | } |
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181 | |
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182 | int |
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183 | symbol::section_index () const |
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184 | { |
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185 | return esym_.st_shndx; |
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186 | } |
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187 | |
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188 | elf::elf_addr |
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189 | symbol::value () const |
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190 | { |
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191 | return esym_.st_value; |
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192 | } |
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193 | |
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194 | uint32_t |
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195 | symbol::info () const |
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196 | { |
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197 | return esym_.st_info; |
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198 | } |
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199 | |
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200 | rld::files::object* |
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201 | symbol::object () const |
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202 | { |
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203 | return object_; |
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204 | } |
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205 | |
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206 | void |
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207 | symbol::set_object (rld::files::object& obj) |
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208 | { |
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209 | object_ = &obj; |
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210 | } |
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211 | |
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212 | const elf::elf_sym& |
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213 | symbol::esym () const |
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214 | { |
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215 | return esym_; |
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216 | } |
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217 | |
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218 | void |
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219 | symbol::referenced () |
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220 | { |
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221 | ++references_; |
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222 | if (object_) |
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223 | object_->symbol_referenced (); |
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224 | } |
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225 | |
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226 | bool |
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227 | symbol::operator< (const symbol& rhs) const |
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228 | { |
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229 | return name_ < rhs.name_; |
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230 | } |
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231 | |
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232 | void |
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233 | symbol::output (std::ostream& out) const |
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234 | { |
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235 | const elf::elf_sym& es = esym (); |
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236 | |
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237 | std::string binding; |
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238 | int binding_val = GELF_ST_BIND (es.st_info); |
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239 | switch (binding_val) |
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240 | { |
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241 | case STB_LOCAL: |
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242 | binding = "STB_LOCAL "; |
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243 | break; |
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244 | case STB_GLOBAL: |
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245 | binding = "STB_GLOBAL"; |
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246 | break; |
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247 | case STB_WEAK: |
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248 | binding = "STB_WEAK "; |
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249 | break; |
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250 | default: |
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251 | if ((binding_val >= STB_LOPROC) && (binding_val <= STB_HIPROC)) |
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252 | binding = "STB_LOPROC(" + rld::to_string (binding_val) + ")"; |
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253 | else |
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254 | binding = "STB_INVALID(" + rld::to_string (binding_val) + ")"; |
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255 | break; |
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256 | } |
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257 | |
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258 | std::string type; |
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259 | int type_val = GELF_ST_TYPE (es.st_info); |
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260 | switch (type_val) |
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261 | { |
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262 | case STT_NOTYPE: |
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263 | type = "STT_NOTYPE "; |
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264 | break; |
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265 | case STT_OBJECT: |
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266 | type = "STT_OBJECT "; |
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267 | break; |
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268 | case STT_FUNC: |
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269 | type = "STT_FUNC "; |
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270 | break; |
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271 | case STT_SECTION: |
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272 | type = "STT_SECTION"; |
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273 | break; |
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274 | case STT_FILE: |
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275 | type = "STT_FILE "; |
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276 | break; |
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277 | default: |
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278 | if ((type_val >= STT_LOPROC) && (type_val <= STT_HIPROC)) |
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279 | type = "STT_LOPROC(" + rld::to_string (type_val) + ")"; |
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280 | else |
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281 | type = "STT_INVALID(" + rld::to_string (type_val) + ")"; |
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282 | break; |
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283 | } |
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284 | |
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285 | out << std::setw (8) << index_ |
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286 | << ' ' << binding |
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287 | << ' ' << type |
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288 | << ' ' << std::setw(6) << es.st_shndx |
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289 | << " 0x" << std::setw (8) << std::setfill ('0') << std::hex |
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290 | << es.st_value |
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291 | << std::dec << std::setfill (' ') |
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292 | << ' ' << std::setw (7) << es.st_size |
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293 | << ' '; |
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294 | |
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295 | if (is_cplusplus ()) |
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296 | out << demangled (); |
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297 | else |
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298 | out << name (); |
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299 | |
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300 | if (object ()) |
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301 | out << " (" << object ()->name ().basename () << ')'; |
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302 | } |
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303 | |
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304 | table::table () |
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305 | { |
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306 | } |
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307 | |
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308 | table::~table () |
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309 | { |
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310 | } |
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311 | |
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312 | void |
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313 | table::add_global (symbol& sym) |
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314 | { |
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315 | globals_[sym.name ()] = &sym; |
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316 | } |
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317 | |
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318 | void |
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319 | table::add_weak (symbol& sym) |
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320 | { |
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321 | weaks_[sym.name ()] = &sym; |
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322 | } |
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323 | |
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324 | void |
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325 | table::add_local (symbol& sym) |
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326 | { |
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327 | locals_[sym.name ()] = &sym; |
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328 | } |
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329 | |
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330 | symbol* |
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331 | table::find_global (const std::string& name) |
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332 | { |
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333 | symtab::iterator sti = globals_.find (name); |
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334 | if (sti == globals_.end ()) |
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335 | return 0; |
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336 | return (*sti).second; |
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337 | } |
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338 | |
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339 | symbol* |
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340 | table::find_weak (const std::string& name) |
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341 | { |
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342 | symtab::iterator sti = weaks_.find (name); |
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343 | if (sti == weaks_.end ()) |
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344 | return 0; |
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345 | return (*sti).second; |
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346 | } |
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347 | |
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348 | symbol* |
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349 | table::find_local (const std::string& name) |
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350 | { |
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351 | symtab::iterator sti = locals_.find (name); |
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352 | if (sti == locals_.end ()) |
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353 | return 0; |
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354 | return (*sti).second; |
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355 | } |
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356 | |
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357 | size_t |
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358 | table::size () const |
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359 | { |
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360 | return globals_.size () + weaks_.size () + locals_.size (); |
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361 | } |
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362 | |
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363 | const symtab& |
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364 | table::globals () const |
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365 | { |
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366 | return globals_; |
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367 | } |
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368 | |
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369 | const symtab& |
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370 | table::weaks () const |
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371 | { |
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372 | return weaks_; |
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373 | } |
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374 | |
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375 | const symtab& |
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376 | table::locals () const |
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377 | { |
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378 | return locals_; |
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379 | } |
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380 | |
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381 | void |
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382 | table::globals (addrtab& addresses) |
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383 | { |
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384 | for (symtab::iterator gi = globals_.begin (); |
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385 | gi != globals_.end (); |
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386 | ++gi) |
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387 | { |
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388 | symbol& sym = *((*gi).second); |
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389 | addresses[sym.value ()] = (*gi).second; |
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390 | } |
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391 | } |
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392 | |
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393 | void |
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394 | table::weaks (addrtab& addresses) |
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395 | { |
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396 | for (symtab::iterator wi = weaks_.begin (); |
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397 | wi != weaks_.end (); |
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398 | ++wi) |
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399 | { |
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400 | symbol& sym = *((*wi).second); |
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401 | addresses[sym.value ()] = (*wi).second; |
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402 | } |
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403 | } |
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404 | |
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405 | void |
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406 | table::locals (addrtab& addresses) |
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407 | { |
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408 | for (symtab::iterator li = locals_.begin (); |
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409 | li != locals_.end (); |
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410 | ++li) |
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411 | { |
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412 | symbol& sym = *((*li).second); |
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413 | addresses[sym.value ()] = (*li).second; |
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414 | } |
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415 | } |
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416 | |
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417 | void |
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418 | load (bucket& bucket_, table& table_) |
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419 | { |
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420 | for (bucket::iterator sbi = bucket_.begin (); |
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421 | sbi != bucket_.end (); |
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422 | ++sbi) |
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423 | { |
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424 | table_.add_global (*sbi); |
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425 | } |
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426 | } |
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427 | |
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428 | void |
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429 | load (bucket& bucket_, symtab& table_) |
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430 | { |
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431 | for (bucket::iterator sbi = bucket_.begin (); |
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432 | sbi != bucket_.end (); |
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433 | ++sbi) |
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434 | { |
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435 | symbol& sym = *sbi; |
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436 | table_[sym.name ()] = &sym; |
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437 | } |
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438 | } |
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439 | |
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440 | size_t |
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441 | referenced (pointers& symbols) |
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442 | { |
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443 | size_t used = 0; |
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444 | for (pointers::iterator sli = symbols.begin (); |
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445 | sli != symbols.end (); |
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446 | ++sli) |
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447 | { |
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448 | symbol& sym = *(*sli); |
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449 | if (sym.references ()) |
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450 | ++used; |
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451 | } |
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452 | |
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453 | return used; |
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454 | } |
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455 | |
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456 | void |
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457 | output (std::ostream& out, const table& symbols) |
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458 | { |
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459 | out << "Globals:" << std::endl; |
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460 | output (out, symbols.globals ()); |
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461 | out << "Weaks:" << std::endl; |
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462 | output (out, symbols.weaks ()); |
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463 | out << "Locals:" << std::endl; |
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464 | output (out, symbols.locals ()); |
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465 | } |
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466 | |
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467 | void |
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468 | output (std::ostream& out, const symtab& symbols) |
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469 | { |
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470 | out << " No. Index Scope Type SHNDX Address Size Name" << std::endl; |
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471 | int index = 0; |
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472 | for (symtab::const_iterator si = symbols.begin (); |
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473 | si != symbols.end (); |
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474 | ++si) |
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475 | { |
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476 | const symbol& sym = *((*si).second); |
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477 | out << std::setw (5) << index << ' ' << sym << std::endl; |
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478 | ++index; |
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479 | } |
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480 | } |
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481 | |
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482 | } |
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483 | } |
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