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1 // Copyright (c) 2001-2009 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 // |
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15 |
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16 #if !defined(__ELFDLL_H__) |
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17 #define __ELFDLL_H__ |
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18 //#include <e32rom.h> |
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19 #include "e32ldfmt.h" |
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20 #include <tools/elfdefs.h> |
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21 #include "elffile.h" |
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22 |
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23 #define DLLSYMPREFIX "#<DLL>" |
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24 #define DLLSYMPREFIX0 "#" |
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25 #define DLLSYMSUFFIX "#<\\DLL>" |
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26 #define ORDBASE 16 |
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27 #define EXPORTTABLENAME "DLL##ExportTable" |
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28 #define EXPORTTABLESIZENAME "DLL##ExportTableSize" |
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29 |
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30 class NamedExportSymbol; |
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31 class OrdZeroRecord; |
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32 struct NeededDLLsList; |
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33 |
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34 const TUint KNameLookupOffsetFlag32 = 0x0001; |
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35 |
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36 class ELFFile::ELFDllData |
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37 { |
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38 public: |
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39 ELFFile * iElfFile; |
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40 |
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41 char * iDynStrTab; |
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42 // bytesize of the dynamic string table |
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43 TInt iDynStrTabSize; |
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44 Elf32_Sym * iDynSymTab; |
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45 // size of an entry in the dynamic symbol table |
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46 TInt iSymSize; |
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47 // the rela relocation table |
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48 Elf32_Rela * iRela; |
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49 // size of rela relocation table in bytes |
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50 TInt iRelaSz; |
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51 // size of a rela entry in bytes |
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52 TInt iRelaEnt; |
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53 // the rel relocation table |
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54 Elf32_Rel * iRel; |
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55 // size of rel relocation table in bytes |
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56 TInt iRelSz; |
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57 // size of a rel entry in bytes |
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58 TInt iRelEnt; |
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59 |
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60 Elf32_HashTable * iHashTable; |
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61 |
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62 // Exported symbols required for lookup via names. |
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63 NamedExportSymbol *iNamedExportSymbolHead; |
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64 // Number of exported symbols - this doesn't nclude the absent symbols. |
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65 TInt iNamedExportCount; |
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66 // header of the export symbol info table |
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67 E32EpocExpSymInfoHdr iSymInfoHdr; |
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68 // String table size for the symbol names. |
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69 TUint iSymStringTableSize; |
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70 TUint iStringNameOffset; |
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71 |
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72 // Dependency list |
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73 // Static Dependencies - An 'import relocation' entry is required to be created |
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74 // for each such record. |
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75 OrdZeroRecord *iDepRecords; |
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76 OrdZeroRecord *iDepRecordsTail; |
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77 |
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78 // List of names obtained from DT_NEEDED entries in ELF. |
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79 // The order in which they appear is the order in which symbol |
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80 // lookup shall be followed. |
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81 NeededDLLsList *iNeededDllNames; |
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82 NeededDLLsList *iNeededDllNamesTail; |
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83 // Ordinal 0 of this binary. - A local relocation needs to be created for this |
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84 // record. |
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85 |
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86 OrdZeroRecord *iOrdZeroRec; |
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87 TInt iNamedLookupEnabled; |
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88 |
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89 ELFDllData(ELFFile * f); |
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90 ~ELFDllData(); |
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91 TBool Init(); |
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92 |
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93 TBool ParseDllSymbol(Elf32_Sym * s, char*& dll, TUint& len, TInt& ord); |
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94 class DllSymbol |
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95 { |
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96 public: |
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97 char * iDll; |
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98 TUint iLen; |
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99 TInt iOrd; |
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100 Elf32_Phdr * iSegment; |
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101 Elf32_Rel * iRel; |
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102 DllSymbol * iNext; |
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103 |
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104 DllSymbol(char * n, TUint l, TInt o) |
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105 : iDll(n), iLen(l), iOrd(o), iSegment(0),iRel(0),iNext(0) |
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106 {} |
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107 ~DllSymbol() |
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108 { |
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109 delete iNext; |
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110 } |
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111 }; |
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112 DllSymbol * DllSymbolP(Elf32_Sym * s); |
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113 TBool AddSymbol(DllSymbol * s); |
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114 |
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115 class DllRec |
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116 { |
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117 public: |
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118 char * iName; |
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119 TUint iLen; |
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120 TInt nImports; |
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121 DllSymbol * iHead; |
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122 DllSymbol * iTail; |
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123 DllRec * iNext; |
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124 |
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125 DllRec(char * n, TInt l, DllSymbol * s) : |
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126 iName(n), iLen(l), nImports(1), iHead(s), iTail(s), iNext(0) |
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127 {} |
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128 ~DllRec() |
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129 { |
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130 delete iHead; |
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131 delete iNext; |
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132 } |
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133 void AddSymbol(DllSymbol * s); |
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134 }; |
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135 |
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136 DllRec * iDllHead; |
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137 DllRec * iDllTail; |
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138 |
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139 Elf32_Word iExportTableSymIdx; |
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140 Elf32_Word iExportTableSizeSymIdx; |
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141 |
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142 TBool InitExportInfo(); |
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143 TBool iImageIsDll; |
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144 TBool ImageIsDll() { return iImageIsDll; } |
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145 |
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146 Elf32_Word FindSymbolIndex(TText * s); |
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147 |
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148 TInt iNumberOfImports; |
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149 TInt iNumberOfExports; |
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150 TInt iNumberOfImportDlls; |
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151 |
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152 TInt iStringTableSize; |
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153 |
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154 TInt iNumberOfRelocs; |
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155 TInt iNumberOfCodeRelocs; |
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156 TInt iNumberOfDataRelocs; |
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157 |
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158 TInt NumberOfImports(void); |
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159 TInt NumberOfExports(void); |
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160 TInt NumberOfImportDlls(void); |
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161 |
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162 TInt NumberOfRelocs(void); |
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163 |
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164 TInt NumberOfCodeRelocs() { return iNumberOfCodeRelocs; } |
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165 TInt NumberOfDataRelocs() { return iNumberOfDataRelocs; } |
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166 |
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167 TBool GetRelocs(Elf32_Rel **aCodeRelocs, Elf32_Rel **aDataRelocs); |
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168 |
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169 TUint GetExportTableOffset(void); |
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170 char * CreateImportSection(TInt &aSize); |
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171 TBool CreateSymLookupTable(); |
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172 TBool SetupSymbolValues(); |
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173 TBool SetupSymbolNames(); |
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174 void Sort(NamedExportSymbol** aDstList, NamedExportSymbol* aSrcList); |
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175 void MergeSort(NamedExportSymbol** aDstList, NamedExportSymbol** aSrcList); |
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176 void MergeSort(NamedExportSymbol** aDstList, NamedExportSymbol** aSrcList, \ |
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177 TUint aLeft, TUint aRight); |
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178 TBool AddToDependency(TUint aOff); |
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179 TBool CreateDependency(); |
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180 OrdZeroRecord* FindDependency(char* aName, TUint aLen); |
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181 DllRec * SearchImports(char *aName); |
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182 TInt GetLookupTblSize(){ return iSymInfoHdr.iSize;} |
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183 void SetLookupTblBase(TInt); |
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184 void GetExportSymInfoHeader(E32EpocExpSymInfoHdr& aSymInfoHdr); |
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185 void SetExportSymInfo(); |
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186 TUint GetSymLookupSection(char* aBuff); |
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187 }; |
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188 |
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189 // This class is used to create symbols to support named lookups. |
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190 // |
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191 class NamedExportSymbol |
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192 { |
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193 public: |
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194 NamedExportSymbol(char* aName, Elf32_Addr aValue); |
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195 ~NamedExportSymbol() |
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196 { |
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197 delete iNext; |
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198 } |
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199 |
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200 char* Name() { return iSymbolName;} |
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201 void Name(char* aName) {iSymbolName = aName;} |
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202 |
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203 TUint NameOffset() {return iSymbolNameOffset;} |
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204 void NameOffset(TUint aOffset) {iSymbolNameOffset = aOffset;} |
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205 |
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206 Elf32_Addr Value() { return iValue;} |
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207 void Value(Elf32_Addr aValue) { iValue = aValue;} |
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208 |
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209 NamedExportSymbol* Next() { return iNext;} |
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210 void Next(NamedExportSymbol* aNext) { iNext = aNext;} |
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211 |
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212 Elf32_Rel iReloc; // relocation entry for the symbol address |
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213 TUint iSymRelocType; // Whether it is a code or data relocation for this symbol |
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214 private: |
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215 char* iSymbolName; // Symbol name |
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216 TInt iSymIdx; |
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217 TUint iSymbolNameOffset;// offset of name in string table. |
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218 Elf32_Addr iValue; // symbol value - this is the address of the symbol |
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219 NamedExportSymbol *iNext; // next symbol |
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220 }; |
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221 |
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222 // This class is used to support symbol lookup of the static dependencies by linking in their |
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223 // 0th ordinal. |
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224 class OrdZeroRecord |
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225 { |
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226 public: |
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227 OrdZeroRecord(char* aName): |
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228 iName(aName), iNext(0){} |
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229 ~OrdZeroRecord() |
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230 { |
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231 delete iNext; |
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232 } |
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233 char *iName; // (linkas) name of the dependency |
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234 Elf32_Rel iReloc; // a relocation entry for the 0th ordinal of each dependency |
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235 OrdZeroRecord *iNext; // next dependency |
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236 TUint iOffset; |
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237 }; |
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238 struct NeededDLLsList |
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239 { |
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240 NeededDLLsList(TUint aOff) : iOffset(aOff), iNext(0) |
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241 {} |
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242 ~NeededDLLsList() |
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243 { |
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244 delete iNext; |
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245 } |
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246 TUint iOffset; |
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247 NeededDLLsList *iNext; |
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248 }; |
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249 |
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250 #endif |
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251 |