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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Implementation of the Class ElfExports for the elf2e32 tool |
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15 // @internalComponent |
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16 // @released |
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17 // |
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18 // |
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19 |
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20 #include "pl_elfexports.h" |
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21 #include "pl_elfexecutable.h" |
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22 #include "pl_dllsymbol.h" |
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23 |
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24 using std::set_difference; |
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25 |
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26 /** |
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27 Constructor for class ElfExports |
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28 @internalComponent |
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29 @released |
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30 */ |
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31 ElfExports::ElfExports() : iDllName(NULL), iSorted(false), iExportsFilteredP(false){ |
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32 } |
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33 |
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34 /** |
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35 Destructor for class ElfExports |
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36 @internalComponent |
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37 @released |
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38 */ |
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39 ElfExports::~ElfExports() |
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40 { |
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41 if(iExportList.size()) |
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42 { |
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43 ExportList::iterator aItr = iExportList.begin(); |
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44 ExportList::iterator last = iExportList.end(); |
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45 DllSymbol *temp; |
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46 |
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47 while( aItr != last) |
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48 { |
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49 temp = *aItr; |
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50 aItr++; |
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51 delete temp; |
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52 } |
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53 } |
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54 iExportList.clear(); |
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55 |
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56 } |
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57 |
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58 /** |
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59 This function validates exported symbols. The typeinfo name strings |
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60 are not valid export symbols and are discarded. |
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61 @param aExecutable - Instance of class ElfExecutable |
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62 @param aSym - DllSymbol |
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63 @return True if symbol is valid, otherwise false |
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64 @internalComponent |
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65 @released |
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66 */ |
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67 bool ElfExports::ValidExportP(ElfExecutable * aExecutable, DllSymbol * aSym) |
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68 { |
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69 char * aSymName = aExecutable->GetSymbolName(aSym->iSymbolIndex); |
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70 int result = strncmp(aSymName, "_ZTS", strlen("_ZTS")); |
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71 return ( result != 0); |
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72 } |
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73 |
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74 /** |
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75 This function adds export symbols into exports list. |
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76 @param aDll - Dll name |
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77 @param aExecutable - Instance of class ElfExecutable |
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78 @param aSym - Dll symbol |
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79 @return Dll Symbol if its valid, otherwise NULL |
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80 @internalComponent |
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81 @released |
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82 */ |
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83 DllSymbol* ElfExports::Add(char *aDll, ElfExecutable * aExecutable, DllSymbol *aSym) |
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84 { |
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85 if (ValidExportP(aExecutable, aSym)) |
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86 { |
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87 if( !iDllName ) |
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88 iDllName = aDll; |
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89 |
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90 iExportList.push_back(aSym); |
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91 iSorted = false; |
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92 return aSym; |
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93 } |
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94 return NULL; |
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95 } |
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96 |
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97 /** |
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98 Function to add elf exports |
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99 @param aDll - Dll name |
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100 @param aSym - Dll symbol |
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101 @internalComponent |
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102 @released |
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103 */ |
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104 void ElfExports::Add(char *aDll, DllSymbol *aSym) |
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105 { |
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106 if( !iDllName ) |
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107 iDllName = aDll; |
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108 iExportList.push_back(aSym); |
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109 iSorted = false; |
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110 } |
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111 |
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112 /** |
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113 Function to sort elf exports. Sorting may be done based on the symbol |
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114 name or on the ordinal number depending on the usecase. |
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115 @internalComponent |
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116 @released |
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117 */ |
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118 void ElfExports::Sort() |
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119 { |
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120 if (!iSorted) { |
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121 if(iExportsFilteredP) { |
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122 std::sort(iFilteredExports.begin(), iFilteredExports.end(), PtrELFExportNameCompare()); |
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123 } |
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124 else { |
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125 std::sort(iExportList.begin(), iExportList.end(), PtrELFExportNameCompare()); |
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126 } |
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127 iSorted = true; |
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128 } |
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129 } |
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130 |
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131 /** |
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132 Function to get exports list. |
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133 @param aSorted - sort before returning the exports. |
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134 @return export list |
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135 @internalComponent |
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136 @released |
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137 */ |
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138 ElfExports::ExportList & ElfExports::GetExports(bool aSorted) |
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139 { |
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140 if (aSorted) Sort(); |
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141 |
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142 if(iExportsFilteredP) |
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143 return iFilteredExports; |
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144 else |
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145 return iExportList; |
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146 } |
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147 |
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148 /** |
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149 Function to get exports in ordinal order |
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150 @return export list |
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151 @internalComponent |
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152 @released |
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153 */ |
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154 ElfExports::ExportList & ElfExports::GetExportsInOrdinalOrder() |
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155 { |
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156 if (iExportsFilteredP) |
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157 { |
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158 std::sort(iFilteredExports.begin(), iFilteredExports.end(), PtrELFExportOrdinalCompare()); |
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159 return iFilteredExports; |
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160 } |
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161 else |
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162 { |
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163 std::sort(iExportList.begin(), iExportList.end(), PtrELFExportOrdinalCompare()); |
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164 return iExportList; |
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165 } |
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166 } |
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167 |
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168 /** |
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169 Function to process the filtered exports |
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170 @internalComponent |
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171 @released |
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172 */ |
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173 void ElfExports::FilterExports() |
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174 { |
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175 std::sort(iExportList.begin(), iExportList.end(), PtrELFExportNameCompare()); |
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176 std::sort(iFilteredExports.begin(), iFilteredExports.end(), PtrELFExportNameCompare()); |
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177 |
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178 ExportList aNewList(iExportList.size()); |
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179 ExportList::iterator aNewListBegin = aNewList.begin(); |
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180 |
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181 ExportList::iterator aNewListEnd = set_difference(iExportList.begin(), iExportList.end(), \ |
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182 iFilteredExports.begin(), iFilteredExports.end(), aNewListBegin, PtrELFExportNameCompare()); |
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183 |
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184 iFilteredExports.clear(); |
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185 while (aNewListBegin != aNewListEnd) |
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186 { |
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187 iFilteredExports.push_back(*aNewListBegin); |
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188 aNewListBegin++; |
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189 } |
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190 } |
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191 |
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192 /** |
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193 Function to get number of exports |
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194 @return size of export list |
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195 @internalComponent |
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196 @released |
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197 */ |
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198 size_t ElfExports::GetNumExports() |
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199 { |
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200 return iExportList.size(); |
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201 } |
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202 |
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203 /** |
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204 Function to get Dll name |
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205 @return Dll name |
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206 @internalComponent |
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207 @released |
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208 */ |
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209 char* ElfExports::DllName() |
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210 { |
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211 return iDllName; |
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212 } |
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213 |
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214 /** |
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215 Overloaded operator to compare ELF export names. |
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216 @return True if lhs symbol name < rhs symbol name, otherwise false |
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217 @internalComponent |
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218 @released |
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219 */ |
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220 bool ElfExports::PtrELFExportNameCompare::operator()(const Symbol * lhs, const Symbol * rhs) const |
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221 { |
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222 return strcmp( lhs->SymbolName(), rhs->SymbolName()) < 0; |
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223 } |
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224 |
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225 /** |
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226 Overloaded operator to compare ordinal numbers of symbols. |
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227 @return True if lhs symbol name < rhs symbol name, otherwise false |
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228 @internalComponent |
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229 @released |
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230 */ |
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231 bool ElfExports::PtrELFExportOrdinalCompare::operator()(const Symbol * lhs, const Symbol * rhs) const |
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232 { |
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233 return lhs->OrdNum() < rhs->OrdNum(); |
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234 } |
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235 |
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236 /** |
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237 Overloaded operator to compare update symbol attributes that are |
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238 being compared. The comparision is done on the symbol names. |
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239 @return True if lhs symbol name < rhs symbol name, otherwise false |
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240 @internalComponent |
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241 @released |
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242 */ |
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243 bool ElfExports::PtrELFExportNameCompareUpdateAttributes::operator()(const Symbol * lhs, const Symbol * rhs) const |
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244 { |
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245 int result = strcmp(lhs->SymbolName(), rhs->SymbolName()); |
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246 if (!result) |
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247 { |
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248 if (lhs->OrdNum() > 0) |
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249 ((Symbol*)rhs)->SetOrdinal( lhs->OrdNum()); |
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250 else if (rhs->OrdNum() > 0) |
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251 ((Symbol*)lhs)->SetOrdinal( rhs->OrdNum()); |
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252 |
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253 if( ((Symbol*)lhs)->Absent() ) |
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254 ((Symbol*)rhs)->SetAbsent(true); |
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255 else if ( ((Symbol*)rhs)->Absent() ) |
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256 ((Symbol*)lhs)->SetAbsent(true); |
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257 |
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258 if( ((Symbol*)lhs)->SymbolSize() ) |
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259 ((Symbol*)rhs)->SetSymbolSize(((Symbol*)lhs)->SymbolSize()); |
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260 else if( ((Symbol*)rhs)->SymbolSize() ) |
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261 ((Symbol*)lhs)->SetSymbolSize(((Symbol*)rhs)->SymbolSize()); |
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262 } |
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263 return result < 0; |
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264 } |
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265 |