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 | static void |
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41 | denamgle_name (std::string& name, std::string& demangled) |
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42 | { |
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43 | char* demangled_name = ::cplus_demangle (name.c_str (), |
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44 | DMGL_ANSI | DMGL_PARAMS); |
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45 | if (demangled_name) |
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46 | { |
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47 | demangled = demangled_name; |
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48 | ::free (demangled_name); |
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49 | } |
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50 | } |
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51 | |
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52 | symbol::symbol () |
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53 | : object_ (0), |
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54 | references_ (0) |
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55 | { |
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56 | memset (&esym_, 0, sizeof (esym_)); |
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57 | } |
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58 | |
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59 | symbol::symbol (const std::string& name, |
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60 | rld::files::object& object, |
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61 | const elf::elf_sym& esym) |
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62 | : name_ (name), |
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63 | object_ (&object), |
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64 | esym_ (esym), |
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65 | references_ (0) |
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66 | { |
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67 | if (!object_) |
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68 | throw rld_error_at ("object pointer is 0"); |
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69 | if (name_.empty ()) |
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70 | throw rld_error_at ("name is empty in " + object.name ().full ()); |
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71 | if (is_cplusplus ()) |
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72 | denamgle_name (name_, demangled_); |
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73 | } |
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74 | |
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75 | symbol::symbol (const std::string& name, const elf::elf_sym& esym) |
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76 | : name_ (name), |
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77 | object_ (0), |
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78 | esym_ (esym), |
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79 | references_ (0) |
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80 | { |
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81 | if (name_.empty ()) |
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82 | throw rld_error_at ("name is empty"); |
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83 | if (is_cplusplus ()) |
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84 | denamgle_name (name_, demangled_); |
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85 | } |
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86 | |
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87 | symbol::symbol (const std::string& name, |
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88 | const elf::elf_addr value) |
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89 | : name_ (name), |
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90 | object_ (0), |
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91 | references_ (0) |
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92 | { |
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93 | memset (&esym_, 0, sizeof (esym_)); |
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94 | esym_.st_value = value; |
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95 | } |
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96 | |
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97 | symbol::symbol (const char* name, |
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98 | const elf::elf_addr value) |
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99 | : name_ (name), |
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100 | object_ (0), |
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101 | references_ (0) |
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102 | { |
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103 | memset (&esym_, 0, sizeof (esym_)); |
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104 | esym_.st_value = value; |
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105 | } |
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106 | |
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107 | const std::string& |
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108 | symbol::name () const |
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109 | { |
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110 | return name_; |
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111 | } |
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112 | |
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113 | const std::string& |
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114 | symbol::demangled () const |
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115 | { |
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116 | return demangled_; |
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117 | } |
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118 | |
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119 | bool |
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120 | symbol::is_cplusplus () const |
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121 | { |
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122 | return (name_[0] == '_') && (name_[1] == 'Z'); |
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123 | } |
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124 | |
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125 | rld::files::object* |
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126 | symbol::object () const |
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127 | { |
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128 | return object_; |
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129 | } |
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130 | |
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131 | void |
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132 | symbol::set_object (rld::files::object& obj) |
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133 | { |
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134 | object_ = &obj; |
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135 | } |
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136 | |
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137 | const elf::elf_sym& |
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138 | symbol::esym () const |
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139 | { |
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140 | return esym_; |
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141 | } |
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142 | |
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143 | void |
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144 | symbol::referenced () |
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145 | { |
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146 | ++references_; |
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147 | if (object_) |
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148 | object_->symbol_referenced (); |
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149 | } |
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150 | |
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151 | bool |
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152 | symbol::operator< (const symbol& rhs) const |
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153 | { |
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154 | return name_ < rhs.name_; |
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155 | } |
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156 | |
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157 | void |
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158 | symbol::output (std::ostream& out) const |
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159 | { |
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160 | const elf::elf_sym& es = esym (); |
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161 | |
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162 | std::string binding; |
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163 | int binding_val = GELF_ST_BIND (es.st_info); |
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164 | switch (binding_val) |
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165 | { |
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166 | case STB_LOCAL: |
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167 | binding = "STB_LOCAL "; |
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168 | break; |
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169 | case STB_GLOBAL: |
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170 | binding = "STB_GLOBAL"; |
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171 | break; |
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172 | case STB_WEAK: |
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173 | binding = "STB_WEAK "; |
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174 | break; |
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175 | default: |
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176 | if ((binding_val >= STB_LOPROC) && (binding_val <= STB_HIPROC)) |
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177 | binding = "STB_LOPROC(" + rld::to_string (binding_val) + ")"; |
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178 | else |
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179 | binding = "STB_INVALID(" + rld::to_string (binding_val) + ")"; |
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180 | break; |
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181 | } |
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182 | |
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183 | std::string type; |
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184 | int type_val = GELF_ST_TYPE (es.st_info); |
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185 | switch (type_val) |
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186 | { |
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187 | case STT_NOTYPE: |
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188 | type = "STT_NOTYPE "; |
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189 | break; |
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190 | case STT_OBJECT: |
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191 | type = "STT_OBJECT "; |
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192 | break; |
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193 | case STT_FUNC: |
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194 | type = "STT_FUNC "; |
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195 | break; |
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196 | case STT_SECTION: |
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197 | type = "STT_SECTION"; |
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198 | break; |
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199 | case STT_FILE: |
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200 | type = "STT_FILE "; |
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201 | break; |
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202 | default: |
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203 | if ((type_val >= STT_LOPROC) && (type_val <= STT_HIPROC)) |
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204 | type = "STT_LOPROC(" + rld::to_string (type_val) + ")"; |
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205 | else |
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206 | type = "STT_INVALID(" + rld::to_string (type_val) + ")"; |
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207 | break; |
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208 | } |
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209 | |
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210 | out << binding |
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211 | << ' ' << type |
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212 | << " 0x" << std::setw (8) << std::setfill ('0') << std::hex |
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213 | << es.st_value |
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214 | << std::dec << std::setfill (' ') |
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215 | << ' ' << std::setw (7) << es.st_size |
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216 | << ' '; |
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217 | |
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218 | if (is_cplusplus ()) |
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219 | out << demangled (); |
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220 | else |
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221 | out << name (); |
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222 | |
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223 | if (object ()) |
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224 | out << " (" << object ()->name ().basename () << ')'; |
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225 | } |
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226 | |
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227 | size_t |
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228 | referenced (list& symbols) |
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229 | { |
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230 | size_t used = 0; |
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231 | for (rld::symbols::list::iterator sli = symbols.begin (); |
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232 | sli != symbols.end (); |
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233 | ++sli) |
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234 | { |
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235 | rld::symbols::symbol& sym = *(*sli); |
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236 | if (sym.references ()) |
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237 | ++used; |
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238 | } |
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239 | |
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240 | return used; |
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241 | } |
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242 | |
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243 | void |
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244 | output (std::ostream& out, const table& symbols) |
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245 | { |
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246 | std::cout << " No. Scope Type Address Size Name" << std::endl; |
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247 | int index = 0; |
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248 | for (table::const_iterator si = symbols.begin (); |
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249 | si != symbols.end (); |
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250 | ++si) |
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251 | { |
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252 | const symbol& sym = (*si).second; |
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253 | out << std::setw (5) << index << ' ' << sym << std::endl; |
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254 | ++index; |
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255 | } |
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256 | } |
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257 | |
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258 | } |
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259 | } |
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