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 | : index_ (-1), |
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54 | object_ (0), |
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55 | references_ (0) |
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56 | { |
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57 | memset (&esym_, 0, sizeof (esym_)); |
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58 | } |
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59 | |
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60 | symbol::symbol (int index, |
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61 | const std::string& name, |
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62 | files::object& object, |
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63 | const elf::elf_sym& esym) |
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64 | : index_ (index), |
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65 | name_ (name), |
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66 | object_ (&object), |
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67 | esym_ (esym), |
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68 | references_ (0) |
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69 | { |
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70 | if (!object_) |
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71 | throw rld_error_at ("object pointer is 0"); |
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72 | if (is_cplusplus ()) |
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73 | denamgle_name (name_, demangled_); |
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74 | } |
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75 | |
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76 | symbol::symbol (int index, |
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77 | const std::string& name, |
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78 | const elf::elf_sym& esym) |
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79 | : index_ (index), |
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80 | name_ (name), |
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81 | object_ (0), |
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82 | esym_ (esym), |
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83 | references_ (0) |
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84 | { |
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85 | if (is_cplusplus ()) |
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86 | denamgle_name (name_, demangled_); |
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87 | } |
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88 | |
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89 | symbol::symbol (const std::string& name, |
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90 | const elf::elf_addr value) |
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91 | : index_ (-1), |
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92 | name_ (name), |
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93 | object_ (0), |
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94 | references_ (0) |
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95 | { |
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96 | memset (&esym_, 0, sizeof (esym_)); |
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97 | esym_.st_value = value; |
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98 | } |
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99 | |
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100 | symbol::symbol (const char* name, |
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101 | const elf::elf_addr value) |
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102 | : index_ (-1), |
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103 | name_ (name), |
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104 | object_ (0), |
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105 | references_ (0) |
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106 | { |
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107 | memset (&esym_, 0, sizeof (esym_)); |
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108 | esym_.st_value = value; |
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109 | } |
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110 | |
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111 | int |
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112 | symbol::index () const |
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113 | { |
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114 | return index_; |
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115 | } |
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116 | |
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117 | const std::string& |
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118 | symbol::name () const |
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119 | { |
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120 | return name_; |
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121 | } |
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122 | |
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123 | const std::string& |
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124 | symbol::demangled () const |
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125 | { |
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126 | return demangled_; |
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127 | } |
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128 | |
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129 | bool |
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130 | symbol::is_cplusplus () const |
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131 | { |
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132 | return (name_[0] == '_') && (name_[1] == 'Z'); |
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133 | } |
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134 | |
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135 | int |
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136 | symbol::type () const |
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137 | { |
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138 | return GELF_ST_TYPE (esym_.st_info); |
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139 | } |
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140 | |
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141 | int |
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142 | symbol::binding () const |
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143 | { |
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144 | return GELF_ST_BIND (esym_.st_info); |
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145 | } |
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146 | |
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147 | int |
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148 | symbol::section_index () const |
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149 | { |
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150 | return esym_.st_shndx; |
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151 | } |
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152 | |
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153 | elf::elf_addr |
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154 | symbol::value () const |
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155 | { |
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156 | return esym_.st_value; |
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157 | } |
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158 | |
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159 | uint32_t |
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160 | symbol::info () const |
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161 | { |
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162 | return esym_.st_info; |
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163 | } |
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164 | |
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165 | rld::files::object* |
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166 | symbol::object () const |
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167 | { |
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168 | return object_; |
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169 | } |
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170 | |
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171 | void |
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172 | symbol::set_object (rld::files::object& obj) |
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173 | { |
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174 | object_ = &obj; |
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175 | } |
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176 | |
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177 | const elf::elf_sym& |
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178 | symbol::esym () const |
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179 | { |
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180 | return esym_; |
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181 | } |
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182 | |
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183 | void |
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184 | symbol::referenced () |
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185 | { |
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186 | ++references_; |
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187 | if (object_) |
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188 | object_->symbol_referenced (); |
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189 | } |
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190 | |
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191 | bool |
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192 | symbol::operator< (const symbol& rhs) const |
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193 | { |
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194 | return name_ < rhs.name_; |
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195 | } |
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196 | |
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197 | void |
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198 | symbol::output (std::ostream& out) const |
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199 | { |
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200 | const elf::elf_sym& es = esym (); |
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201 | |
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202 | std::string binding; |
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203 | int binding_val = GELF_ST_BIND (es.st_info); |
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204 | switch (binding_val) |
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205 | { |
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206 | case STB_LOCAL: |
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207 | binding = "STB_LOCAL "; |
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208 | break; |
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209 | case STB_GLOBAL: |
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210 | binding = "STB_GLOBAL"; |
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211 | break; |
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212 | case STB_WEAK: |
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213 | binding = "STB_WEAK "; |
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214 | break; |
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215 | default: |
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216 | if ((binding_val >= STB_LOPROC) && (binding_val <= STB_HIPROC)) |
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217 | binding = "STB_LOPROC(" + rld::to_string (binding_val) + ")"; |
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218 | else |
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219 | binding = "STB_INVALID(" + rld::to_string (binding_val) + ")"; |
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220 | break; |
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221 | } |
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222 | |
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223 | std::string type; |
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224 | int type_val = GELF_ST_TYPE (es.st_info); |
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225 | switch (type_val) |
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226 | { |
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227 | case STT_NOTYPE: |
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228 | type = "STT_NOTYPE "; |
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229 | break; |
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230 | case STT_OBJECT: |
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231 | type = "STT_OBJECT "; |
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232 | break; |
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233 | case STT_FUNC: |
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234 | type = "STT_FUNC "; |
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235 | break; |
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236 | case STT_SECTION: |
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237 | type = "STT_SECTION"; |
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238 | break; |
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239 | case STT_FILE: |
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240 | type = "STT_FILE "; |
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241 | break; |
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242 | default: |
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243 | if ((type_val >= STT_LOPROC) && (type_val <= STT_HIPROC)) |
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244 | type = "STT_LOPROC(" + rld::to_string (type_val) + ")"; |
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245 | else |
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246 | type = "STT_INVALID(" + rld::to_string (type_val) + ")"; |
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247 | break; |
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248 | } |
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249 | |
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250 | out << std::setw (5) << index_ |
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251 | << ' ' << binding |
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252 | << ' ' << type |
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253 | << ' ' << std::setw(6) << es.st_shndx |
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254 | << " 0x" << std::setw (8) << std::setfill ('0') << std::hex |
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255 | << es.st_value |
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256 | << std::dec << std::setfill (' ') |
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257 | << ' ' << std::setw (7) << es.st_size |
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258 | << ' '; |
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259 | |
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260 | if (is_cplusplus ()) |
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261 | out << demangled (); |
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262 | else |
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263 | out << name (); |
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264 | |
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265 | if (object ()) |
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266 | out << " (" << object ()->name ().basename () << ')'; |
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267 | } |
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268 | |
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269 | table::table () |
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270 | { |
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271 | } |
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272 | |
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273 | table::~table () |
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274 | { |
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275 | } |
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276 | |
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277 | void |
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278 | table::add_external (symbol& sym) |
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279 | { |
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280 | _externals[sym.name ()] = &sym; |
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281 | } |
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282 | |
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283 | void |
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284 | table::add_weak (symbol& sym) |
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285 | { |
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286 | _weaks[sym.name ()] = &sym; |
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287 | } |
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288 | |
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289 | symbol* |
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290 | table::find_external (const std::string& name) |
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291 | { |
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292 | symtab::iterator sti = _externals.find (name); |
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293 | if (sti == _externals.end ()) |
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294 | return 0; |
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295 | return (*sti).second; |
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296 | } |
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297 | |
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298 | symbol* |
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299 | table::find_weak (const std::string& name) |
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300 | { |
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301 | symtab::iterator sti = _weaks.find (name); |
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302 | if (sti == _weaks.end ()) |
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303 | return 0; |
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304 | return (*sti).second; |
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305 | } |
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306 | |
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307 | size_t |
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308 | table::size () const |
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309 | { |
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310 | return _externals.size () + _weaks.size (); |
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311 | } |
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312 | |
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313 | const symtab& |
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314 | table::externals () const |
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315 | { |
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316 | return _externals; |
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317 | } |
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318 | |
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319 | const symtab& |
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320 | table::weaks () const |
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321 | { |
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322 | return _weaks; |
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323 | } |
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324 | |
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325 | void |
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326 | load (bucket& bucket_, table& table_) |
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327 | { |
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328 | for (bucket::iterator sbi = bucket_.begin (); |
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329 | sbi != bucket_.end (); |
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330 | ++sbi) |
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331 | { |
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332 | table_.add_external (*sbi); |
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333 | } |
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334 | } |
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335 | |
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336 | void |
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337 | load (bucket& bucket_, symtab& table_) |
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338 | { |
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339 | for (bucket::iterator sbi = bucket_.begin (); |
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340 | sbi != bucket_.end (); |
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341 | ++sbi) |
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342 | { |
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343 | symbol& sym = *sbi; |
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344 | table_[sym.name ()] = &sym; |
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345 | } |
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346 | } |
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347 | |
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348 | size_t |
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349 | referenced (pointers& symbols) |
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350 | { |
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351 | size_t used = 0; |
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352 | for (pointers::iterator sli = symbols.begin (); |
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353 | sli != symbols.end (); |
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354 | ++sli) |
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355 | { |
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356 | symbol& sym = *(*sli); |
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357 | if (sym.references ()) |
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358 | ++used; |
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359 | } |
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360 | |
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361 | return used; |
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362 | } |
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363 | |
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364 | void |
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365 | output (std::ostream& out, const table& symbols) |
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366 | { |
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367 | out << "Externals:" << std::endl; |
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368 | output (out, symbols.externals ()); |
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369 | out << "Weaks:" << std::endl; |
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370 | output (out, symbols.weaks ()); |
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371 | } |
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372 | |
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373 | void |
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374 | output (std::ostream& out, const symtab& symbols) |
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375 | { |
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376 | out << " No. Index Scope Type SHNDX Address Size Name" << std::endl; |
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377 | int index = 0; |
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378 | for (symtab::const_iterator si = symbols.begin (); |
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379 | si != symbols.end (); |
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380 | ++si) |
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381 | { |
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382 | const symbol& sym = *((*si).second); |
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383 | out << std::setw (5) << index << ' ' << sym << std::endl; |
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384 | ++index; |
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385 | } |
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386 | } |
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387 | |
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388 | } |
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389 | } |
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