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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 ElfProducer 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_elfproducer.h" |
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21 #include "pl_dllsymbol.h" |
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22 #include <stdio.h> |
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23 #include <string> |
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24 #include "errorhandler.h" |
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25 |
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26 /** |
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27 * Following array is indexed on the SECTION_INDEX enum |
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28 */ |
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29 char* SECTION_NAME[] = { |
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30 "", |
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31 "ER_RO", |
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32 ".dynamic", |
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33 ".hash", |
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34 ".version_d", |
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35 ".version", |
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36 ".strtab", |
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37 ".dynsym", |
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38 ".shstrtab" |
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39 }; |
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40 |
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41 |
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42 /** |
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43 Constructor for class ElfProducer |
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44 @param aParameterListInterface - instance of class ParameterListInterface |
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45 @internalComponent |
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46 @released |
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47 */ |
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48 ElfProducer::ElfProducer(ParameterListInterface *aParameterListInterface): ElfExecutable(aParameterListInterface) , \ |
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49 iDSONameOffset(0),\ |
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50 iLinkAsOffset(0),\ |
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51 iSymbolsList(NULL), |
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52 iDSODaux(NULL), \ |
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53 iDSOBuckets(NULL), \ |
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54 iDSOChains(NULL),\ |
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55 iCodeSectionData(NULL),\ |
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56 iElfFileOffset(0) |
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57 { |
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58 } |
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59 |
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60 |
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61 |
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62 /** |
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63 Destructor for class ElfProducer to release allocated memory |
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64 @internalComponent |
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65 @released |
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66 */ |
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67 ElfProducer::~ElfProducer(){ |
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68 Cleanup(); |
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69 } |
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70 |
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71 |
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72 /** |
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73 This function sets the export Symbol list |
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74 @internalComponent |
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75 @released |
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76 @param aSymbolList The export Symbol list. |
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77 */ |
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78 void ElfProducer::SetSymbolList(SymbolList& aSymbolList){ |
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79 iSymbolsList = &aSymbolList; |
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80 if (iSymbolsList) |
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81 { |
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82 SymbolList::iterator aPos, aEnd; |
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83 aPos = iSymbolsList->begin(); |
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84 aEnd = iSymbolsList->end(); |
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85 char *aAbsentSymbol = "_._.absent_export_"; |
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86 int length = strlen(aAbsentSymbol); |
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87 while(aPos != aEnd) |
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88 { |
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89 /* If a symbol is marked as Absent in the DEF file, replace the |
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90 * symbol name with "_._.absent_export_<Ordinal Number>" |
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91 */ |
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92 if((*aPos)->Absent()) |
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93 { |
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94 int aOrdinalNo = (*aPos)->OrdNum(); |
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95 // Ordinal Number can be upto 0xffff which is 6 digits |
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96 char * aSymName = new char[length+7]; |
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97 sprintf(aSymName, "_._.absent_export_%d", aOrdinalNo); |
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98 (*aPos)->SetSymbolName(aSymName); |
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99 delete[] aSymName; |
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100 } |
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101 aPos++; |
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102 } |
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103 } |
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104 iNSymbols = iSymbolsList->size() + 1; |
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105 } |
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106 |
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107 /** |
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108 This function takes the file names and generates the proxy dso library. |
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109 @internalComponent |
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110 @released |
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111 @param aDsoFullName The full path and proxy-dso file name |
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112 @param aDsoFileName The proxy-dso file name |
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113 @param aLinkAs The DLL that defines the export Symbols |
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114 */ |
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115 void ElfProducer::WriteElfFile(char* aDsoFullName, char* aDsoFileName , char* aLinkAs){ |
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116 |
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117 //This includes the full path followed by the file name |
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118 iDsoFullName = aDsoFullName; |
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119 |
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120 iDSOName = aDsoFileName; |
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121 iLinkAs = aLinkAs; |
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122 |
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123 InitElfContents(); |
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124 |
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125 WriteElfContents(); |
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126 } |
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127 |
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128 /** |
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129 This function initializes the Elf members |
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130 @internalComponent |
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131 @released |
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132 */ |
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133 void ElfProducer::InitElfContents() { |
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134 |
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135 iElfHeader = new Elf32_Ehdr; |
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136 iSections = new Elf32_Shdr[MAX_SECTIONS+1]; |
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137 |
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138 iElfDynSym = new Elf32_Sym[iNSymbols]; |
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139 iVersionTbl = new Elf32_Half[iNSymbols]; |
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140 iVersionDef = new Elf32_Verdef[2]; |
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141 iDSODaux = new Elf32_Verdaux[2]; |
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142 |
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143 iProgHeader = new Elf32_Phdr[2]; |
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144 iCodeSectionData = new PLUINT32[iNSymbols]; |
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145 |
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146 iHashTbl = new Elf32_HashTable; |
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147 |
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148 //premeditated |
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149 iHashTbl->nBuckets = (iNSymbols /3) + (iNSymbols % 0x3); |
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150 |
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151 iHashTbl->nChains = iNSymbols; |
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152 |
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153 iDSOBuckets = new Elf32_Sword[iHashTbl->nBuckets]; |
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154 iDSOChains = new Elf32_Sword[iHashTbl->nChains]; |
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155 |
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156 Elf32_Sword aNullPtr = 0; |
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157 |
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158 memset(iDSOBuckets, aNullPtr, sizeof(Elf32_Sword)*iHashTbl->nBuckets); |
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159 memset(iDSOChains, aNullPtr, sizeof(Elf32_Sword)*iHashTbl->nChains); |
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160 memset(iCodeSectionData, 0, sizeof(PLUINT32)*iNSymbols); |
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161 |
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162 CreateElfHeader(); |
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163 |
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164 SymbolList::iterator aItr = iSymbolsList->begin(); |
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165 SymbolList::iterator aEnd = iSymbolsList->end(); |
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166 Symbol *aSym; |
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167 PLUINT32 aIdx = 1; |
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168 |
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169 memset( &iElfDynSym[0], 0, sizeof(Elf32_Sym)); |
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170 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(), 0); |
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171 |
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172 while(aItr != aEnd) { |
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173 String aSymName(""); |
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174 aSym = *aItr; |
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175 aSymName = aSym->SymbolName(); |
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176 //set symbol info.. |
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177 iElfDynSym[aIdx].st_name = iDSOSymNameStrTbl.size(); |
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178 |
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179 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(), aSymName.begin(), aSymName.end() ); |
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180 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(), 0); |
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181 |
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182 SetSymolFields( aSym, &iElfDynSym[aIdx], aIdx); |
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183 |
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184 //set version table info... |
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185 iVersionTbl[aIdx] = DEFAULT_VERSION; |
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186 AddToHashTable(aSym->SymbolName(), aIdx); |
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187 aItr++;aIdx++; |
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188 } |
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189 |
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190 CreateVersionTable(); |
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191 |
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192 //Fill section headers... |
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193 CreateSections(); |
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194 |
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195 //Copy dyn entries.. |
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196 CreateDynamicEntries(); |
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197 |
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198 //create code section data - this has the ordinal numbers... |
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199 CreateProgHeader(); |
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200 } |
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201 |
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202 /** |
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203 This function creates the version definition table |
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204 @internalComponent |
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205 @released |
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206 */ |
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207 void ElfProducer::CreateVersionTable() |
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208 { |
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209 //Fill verdef table... |
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210 iVersionDef[0].vd_ndx = 1; |
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211 iVersionDef[0].vd_cnt = 1; |
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212 iVersionDef[0].vd_flags = 1; |
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213 iVersionDef[0].vd_hash = Util::elf_hash((const PLUCHAR*) iDSOName.c_str()); |
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214 iVersionDef[0].vd_version = 1; |
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215 |
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216 iVersionDef[0].vd_aux = sizeof(Elf32_Verdef); |
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217 iVersionDef[0].vd_next = sizeof(Elf32_Verdef) + sizeof(Elf32_Verdaux); |
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218 |
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219 iDSONameOffset = iDSOSymNameStrTbl.size(); |
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220 |
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221 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(),iDSOName.begin(), iDSOName.end()); |
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222 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(), 0); |
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223 |
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224 iDSODaux[0].vda_name = iDSONameOffset; |
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225 iDSODaux[0].vda_next = 0; |
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226 |
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227 iVersionDef[1].vd_ndx = DEFAULT_VERSION; |
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228 iVersionDef[1].vd_cnt = 1; |
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229 iVersionDef[1].vd_flags = 0; |
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230 iVersionDef[1].vd_hash = Util::elf_hash((const PLUCHAR*)iLinkAs.c_str()); |
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231 iVersionDef[1].vd_version = 1; |
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232 |
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233 iVersionDef[1].vd_aux = sizeof(Elf32_Verdef); |
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234 iVersionDef[1].vd_next = 0; |
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235 |
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236 iLinkAsOffset = iDSOSymNameStrTbl.size(); |
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237 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(),iLinkAs.begin(), iLinkAs.end()); |
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238 iDSOSymNameStrTbl.insert(iDSOSymNameStrTbl.end(), 0); |
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239 |
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240 iDSODaux[1].vda_name = iLinkAsOffset; |
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241 iDSODaux[1].vda_next = 0; |
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242 |
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243 } |
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244 |
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245 /** |
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246 This function sets the Elf Symbol fields |
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247 @internalComponent |
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248 @released |
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249 @param aSym The Symbol representation |
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250 @param aElfSym The Elf Symbol |
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251 @param aCodeIndex The index at which this Symbol refers to in the code section where, we have the ordinal number |
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252 */ |
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253 void ElfProducer::SetSymolFields(Symbol *aSym, Elf32_Sym* aElfSym, PLUINT32 aCodeIndex) { |
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254 |
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255 aElfSym->st_other = STV_DEFAULT; |
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256 |
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257 aElfSym->st_info = (PLUCHAR) (ELF32_ST_INFO(STB_GLOBAL, aSym->CodeDataType())); |
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258 aElfSym->st_value = (aCodeIndex - 1)*sizeof(Elf32_Word); |
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259 |
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260 if(aSym->CodeDataType() == SymbolTypeCode){ |
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261 aElfSym->st_size = sizeof(Elf32_Word); |
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262 }else{ |
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263 aElfSym->st_size = aSym->SymbolSize(); |
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264 } |
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265 aElfSym->st_shndx = CODE_SECTION; |
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266 } |
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267 |
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268 /** |
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269 This function adds an entry into the hash table based on the symbol name. |
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270 @internalComponent |
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271 @released |
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272 @param aSymName The Symbol name |
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273 @param aIndex The Symbol index in the Symbol table |
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274 */ |
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275 void ElfProducer::AddToHashTable(const char* aSymName, PLUINT32 aIndex) |
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276 { |
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277 Elf32_Sword aNullPtr = 0; |
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278 |
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279 PLULONG aHash = Util::elf_hash((PLUCHAR*)aSymName); |
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280 PLUINT32 aBIdx = aHash % iHashTbl->nBuckets; |
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281 |
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282 if(iDSOBuckets[aBIdx] == aNullPtr) |
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283 { |
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284 iDSOBuckets[aBIdx] = aIndex; |
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285 } |
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286 else |
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287 { |
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288 PLUINT32 aCIdx = iDSOBuckets[aBIdx]; |
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289 |
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290 while(iDSOChains[aCIdx] != aNullPtr){ |
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291 |
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292 /* If the entry is already added into the hash table*/ |
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293 if((PLUINT32)iDSOChains[aCIdx] == aIndex) { |
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294 return; |
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295 } |
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296 aCIdx = iDSOChains[aCIdx]; |
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297 } |
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298 iDSOChains[aCIdx] = aIndex; |
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299 } |
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300 } |
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301 |
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302 /** |
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303 This function creates the different sections of the Elf file |
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304 @internalComponent |
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305 @released |
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306 */ |
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307 void ElfProducer::CreateSections() { |
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308 PLUINT32 aIdx = 0; |
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309 |
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310 //clear the first section... |
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311 memset(&iSections[0], 0, sizeof(Elf32_Shdr)); |
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312 iDSOSectionNames.insert(iDSOSectionNames.begin(), 0); |
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313 |
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314 // Set the ELF file offset. |
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315 // This indicates the start of sections. |
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316 iElfFileOffset = sizeof(Elf32_Ehdr); |
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317 |
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318 iElfFileOffset += (sizeof(Elf32_Shdr) * iElfHeader->e_shnum); |
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319 |
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320 //Check if the string table is 4-byte aligned.. |
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321 AlignString(iDSOSymNameStrTbl); |
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322 |
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323 for(aIdx = 1; aIdx <= MAX_SECTIONS; aIdx++) { |
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324 switch(aIdx) |
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325 { |
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326 case SYMBOL_SECTION: |
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327 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_DYNSYM, \ |
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328 sizeof(Elf32_Sym), (iNSymbols * sizeof(Elf32_Sym)),\ |
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329 STRING_SECTION, CODE_SECTION, 4, 0, 0); |
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330 break; |
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331 case STRING_SECTION: |
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332 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_STRTAB, \ |
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333 1, iDSOSymNameStrTbl.size(), 0, \ |
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334 0, 0, 0,0); |
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335 break; |
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336 case VERSION_SECTION: |
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337 SetSectionFields(aIdx, SECTION_NAME[aIdx], 0x6fffffff, \ |
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338 sizeof(Elf32_Half), (iNSymbols * sizeof(Elf32_Half)), SYMBOL_SECTION, \ |
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339 0, 2, 0, 0); |
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340 break; |
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341 case VER_DEF_SECTION: |
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342 SetSectionFields(aIdx, SECTION_NAME[aIdx],0x6ffffffd, \ |
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343 sizeof(Elf32_Verdaux), (2*(sizeof(Elf32_Verdef) + sizeof(Elf32_Verdaux))),\ |
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344 STRING_SECTION, DYNAMIC_SECTION, 4, 0, 0); |
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345 break; |
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346 case HASH_TBL_SECTION: |
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347 { |
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348 PLUINT32 aSize = sizeof(Elf32_HashTable) + \ |
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349 (sizeof(Elf32_Sword) * (iHashTbl->nBuckets + iHashTbl->nChains)); |
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350 |
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351 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_HASH, \ |
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352 0, aSize, SYMBOL_SECTION, 0, 4, 0, 0); |
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353 } |
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354 break; |
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355 case DYNAMIC_SECTION: |
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356 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_DYNAMIC, \ |
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357 sizeof(Elf32_Dyn), ((MAX_DYN_ENTS + 1) *sizeof(Elf32_Dyn)),\ |
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358 STRING_SECTION, 0, 4, 0,0); |
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359 break; |
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360 case CODE_SECTION: |
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361 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_PROGBITS, \ |
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362 0, (iNSymbols *sizeof(PLUINT32)),\ |
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363 0, 0, 4, (SHF_ALLOC | SHF_EXECINSTR),0); |
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364 break; |
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365 case SH_STR_SECTION: |
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366 { |
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367 PLUINT32 aSize = iDSOSectionNames.size() + strlen(SECTION_NAME[aIdx]); |
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368 SetSectionFields(aIdx, SECTION_NAME[aIdx], SHT_STRTAB, \ |
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369 1, aSize, 0, \ |
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370 0, 0, 0, 0); |
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371 //Check if the string table is 4-byte aligned.. |
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372 AlignString(iDSOSectionNames); |
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373 iSections[aIdx].sh_size = iDSOSectionNames.size(); |
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374 |
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375 } |
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376 break; |
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377 default: |
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378 break; |
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379 } |
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380 iSections[aIdx].sh_offset = iElfFileOffset; |
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381 iElfFileOffset += iSections[aIdx].sh_size; |
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382 |
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383 if(iElfFileOffset %4) { |
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384 iElfFileOffset += (4 - (iElfFileOffset %4)); |
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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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390 This function sets the section header fields. |
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391 @internalComponent |
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392 @released |
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393 @return Error status |
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394 @param aSectionIndex The index of the section |
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395 @param aSectionName The name of the section |
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396 @param aType The type of the section |
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397 @param aEntSz The size of each entry of the section |
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398 @param aSectionSize The size of the section |
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399 @param aLink The section this section is linked to |
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400 @param aInfo Extra information. Depends on the section type of this section. |
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401 @param aAddrAlign The address alignment of this section. |
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402 @param aFlags Section flags |
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403 @param aAddr The address of this section in memory(Here it remains 0) |
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404 */ |
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405 void ElfProducer::SetSectionFields(PLUINT32 aSectionIndex, char* aSectionName, PLUINT32 aType, \ |
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406 PLUINT32 aEntSz, PLUINT32 aSectionSize, PLUINT32 aLink, \ |
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407 PLUINT32 aInfo, PLUINT32 aAddrAlign, PLUINT32 aFlags, \ |
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408 PLUINT32 aAddr) |
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409 { |
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410 String aSecName = aSectionName; |
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411 |
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412 iSections[aSectionIndex].sh_name = iDSOSectionNames.size(); |
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413 iDSOSectionNames.insert(iDSOSectionNames.end(), aSecName.begin(), aSecName.end()); |
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414 iDSOSectionNames.insert(iDSOSectionNames.end(), 0); |
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415 |
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416 iSections[aSectionIndex].sh_type = aType; |
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417 iSections[aSectionIndex].sh_entsize = aEntSz; |
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418 iSections[aSectionIndex].sh_size = aSectionSize; |
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419 iSections[aSectionIndex].sh_link = aLink; |
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420 iSections[aSectionIndex].sh_flags = aFlags; |
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421 iSections[aSectionIndex].sh_addralign = aAddrAlign; |
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422 iSections[aSectionIndex].sh_info = aInfo; |
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423 iSections[aSectionIndex].sh_addr = aAddr; |
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424 } |
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425 |
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426 /** |
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427 This function cleans up the memory allocated to the Elf fields. |
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428 @internalComponent |
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429 @released |
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430 */ |
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431 void ElfProducer::Cleanup() |
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432 { |
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433 DELETE_PTR(iElfHeader); |
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434 DELETE_PTR_ARRAY(iSections); |
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435 DELETE_PTR_ARRAY(iElfDynSym); |
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436 DELETE_PTR_ARRAY(iVersionTbl); |
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437 DELETE_PTR_ARRAY(iVersionDef); |
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438 DELETE_PTR_ARRAY(iDSODaux); |
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439 |
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440 DELETE_PTR_ARRAY(iProgHeader); |
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441 DELETE_PTR_ARRAY(iCodeSectionData); |
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442 DELETE_PTR_ARRAY(iHashTbl); |
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443 DELETE_PTR_ARRAY(iDSOBuckets); |
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444 DELETE_PTR_ARRAY(iDSOChains); |
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445 } |
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446 |
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447 /** |
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448 This function creates the dynamic sections. |
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449 @internalComponent |
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450 @released |
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451 */ |
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452 void ElfProducer::CreateDynamicEntries() |
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453 { |
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454 for(PLUINT32 aIdx = 0; aIdx <= MAX_DYN_ENTS; aIdx++ ) { |
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455 switch(aIdx) { |
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456 case DSO_DT_DSONAME: |
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457 iDSODynTbl[aIdx].d_tag = DT_SONAME; |
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458 iDSODynTbl[aIdx].d_val = iDSONameOffset; |
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459 break; |
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460 case DSO_DT_SYMTAB: |
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461 iDSODynTbl[aIdx].d_tag = DT_SYMTAB; |
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462 iDSODynTbl[aIdx].d_val = iSections[SYMBOL_SECTION].sh_offset; |
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463 break; |
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464 case DSO_DT_SYMENT: |
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465 iDSODynTbl[aIdx].d_tag = DT_SYMENT; |
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466 iDSODynTbl[aIdx].d_val = iSections[SYMBOL_SECTION].sh_entsize; |
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467 break; |
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468 case DSO_DT_STRTAB: |
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469 iDSODynTbl[aIdx].d_tag = DT_STRTAB; |
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470 iDSODynTbl[aIdx].d_val = iSections[STRING_SECTION].sh_offset; |
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471 break; |
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472 case DSO_DT_STRSZ: |
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473 iDSODynTbl[aIdx].d_tag = DT_STRSZ; |
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474 iDSODynTbl[aIdx].d_val = iDSOSymNameStrTbl.size(); |
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475 break; |
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476 case DSO_DT_VERSYM: |
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477 iDSODynTbl[aIdx].d_tag = DT_VERSYM; |
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478 iDSODynTbl[aIdx].d_val = iSections[VERSION_SECTION].sh_offset; |
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479 break; |
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480 case DSO_DT_VERDEF: |
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481 iDSODynTbl[aIdx].d_tag = DT_VERDEF; |
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482 iDSODynTbl[aIdx].d_val = iSections[VER_DEF_SECTION].sh_offset; |
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483 break; |
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484 case DSO_DT_VERDEFNUM: |
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485 iDSODynTbl[aIdx].d_tag = DT_VERDEFNUM; |
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486 iDSODynTbl[aIdx].d_val = 2; |
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487 break; |
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488 case DSO_DT_HASH: |
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489 iDSODynTbl[aIdx].d_tag = DT_HASH; |
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490 iDSODynTbl[aIdx].d_val = iSections[HASH_TBL_SECTION].sh_offset; |
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491 break; |
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492 case DSO_DT_NULL: |
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493 iDSODynTbl[aIdx].d_tag = DT_NULL; |
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494 iDSODynTbl[aIdx].d_val = 0; |
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495 break; |
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496 default: |
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497 break; |
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498 } |
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499 } |
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500 } |
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501 |
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502 /** |
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503 This function creates the Elf header. |
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504 @internalComponent |
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505 @released |
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506 */ |
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507 void ElfProducer::CreateElfHeader() |
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508 { |
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509 //create ELF header |
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510 unsigned char c[EI_NIDENT] = {0x7f, 'E', 'L', 'F', \ |
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511 ELFCLASS32, ELFDATA2LSB, 1, 0, \ |
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512 0, 0, 0, 0, \ |
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513 0, 0, 0, 0}; // e_ident |
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514 |
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515 for (PLUINT32 i=0; i <EI_NIDENT;i++) |
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516 iElfHeader->e_ident[i] = c[i]; |
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517 |
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518 iElfHeader->e_type = ET_DYN; |
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519 iElfHeader->e_machine = EM_ARM; |
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520 iElfHeader->e_version = EV_CURRENT; |
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521 iElfHeader->e_entry = 0; |
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522 iElfHeader->e_shoff = sizeof(Elf32_Ehdr); |
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523 iElfHeader->e_flags = EF_ARM_BPABI_VERSION | EF_ARM_SYMSARESORTED; |
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524 iElfHeader->e_ehsize = sizeof(Elf32_Ehdr); |
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525 iElfHeader->e_phentsize = sizeof(Elf32_Phdr); |
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526 iElfHeader->e_shentsize = sizeof(Elf32_Shdr); |
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527 iElfHeader->e_shnum = MAX_SECTIONS + 1; |
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528 iElfHeader->e_shstrndx = SH_STR_SECTION; |
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529 iElfHeader->e_phnum = 2; |
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530 } |
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531 |
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532 /** |
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533 This function creates the program header |
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534 @internalComponent |
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535 @released |
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536 */ |
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537 void ElfProducer::CreateProgHeader() |
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538 { |
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539 //Update the program header offset.. |
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540 iElfHeader->e_phoff = iElfFileOffset; |
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541 |
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542 // Update code section data.. |
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543 SymbolList::iterator aItr = iSymbolsList->begin(); |
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544 SymbolList::iterator end = iSymbolsList->end(); |
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545 |
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546 Symbol *aSym; |
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547 PLUINT32 aPos = 0; |
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548 while(aItr != end) { |
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549 aSym = *aItr; |
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550 |
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551 iCodeSectionData[aPos] = aSym->OrdNum(); |
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552 aItr++;aPos++; |
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553 } |
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554 |
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555 //Create program header |
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556 iProgHeader[0].p_align = 4; |
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557 iProgHeader[0].p_offset = iSections[CODE_SECTION].sh_offset; |
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558 iProgHeader[0].p_type = PT_LOAD; |
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559 iProgHeader[0].p_flags = (PF_X | PF_ARM_ENTRY); |
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560 iProgHeader[0].p_filesz = iSections[CODE_SECTION].sh_size; |
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561 iProgHeader[0].p_paddr = 0; |
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562 iProgHeader[0].p_vaddr = 0; |
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563 iProgHeader[0].p_memsz = iSections[CODE_SECTION].sh_size; |
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564 |
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565 iProgHeader[1].p_align = 4; |
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566 iProgHeader[1].p_offset = iSections[DYNAMIC_SECTION].sh_offset; |
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567 iProgHeader[1].p_type = PT_DYNAMIC; |
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568 iProgHeader[1].p_flags = (PF_R ); |
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569 iProgHeader[1].p_filesz = iSections[DYNAMIC_SECTION].sh_size; |
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570 iProgHeader[1].p_paddr = 0; |
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571 iProgHeader[1].p_vaddr = 0; |
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572 iProgHeader[1].p_memsz = 0; |
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573 |
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574 } |
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575 |
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576 /** |
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577 This function aligns the string table to a 4-byte boundary |
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578 @internalComponent |
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579 @released |
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580 @return Error status |
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581 @param aStr - string to be aligned |
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582 */ |
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583 void ElfProducer::AlignString(String& aStr) { |
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584 |
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585 if( aStr.size() %4 ){ |
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586 PLUCHAR aPad = (PLUCHAR)(4 - (aStr.size() %4)); |
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587 |
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588 while(aPad--) { |
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589 aStr.insert(aStr.end(), 0); |
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590 } |
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591 } |
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592 } |
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593 |
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594 /** |
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595 This function writes the Elf file contents. |
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596 @internalComponent |
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597 @released |
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598 */ |
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599 void ElfProducer::WriteElfContents() |
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600 { |
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601 FILE *aElfFd; |
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602 PLUINT32 aIndex; |
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603 |
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604 if((aElfFd = fopen(iDsoFullName.c_str(), "wb")) == NULL ) { |
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605 throw FileError(FILEOPENERROR, (char*)iDsoFullName.c_str()); |
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606 } |
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607 |
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608 // The ELF header.. |
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609 fwrite(iElfHeader, 1, sizeof(Elf32_Ehdr), aElfFd); |
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610 |
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611 //Section headers |
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612 for(aIndex = 0; aIndex <= MAX_SECTIONS; aIndex++) { |
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613 fwrite(&iSections[aIndex], 1, sizeof(Elf32_Shdr), aElfFd); |
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614 } |
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615 |
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616 |
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617 //Each section.. |
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618 |
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619 //code |
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620 for(aIndex = 0; aIndex < iNSymbols; aIndex++) { |
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621 fwrite(&iCodeSectionData[aIndex], 1, sizeof(PLUINT32), aElfFd ); |
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622 } |
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623 |
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624 //dyn table |
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625 for(aIndex = 0; aIndex <= MAX_DYN_ENTS; aIndex++) { |
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626 fwrite(&iDSODynTbl[aIndex], 1, sizeof(Elf32_Dyn), aElfFd); |
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627 } |
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628 |
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629 //hash table |
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630 fwrite(&iHashTbl->nBuckets, 1, sizeof(Elf32_Word), aElfFd); |
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631 fwrite(&iHashTbl->nChains, 1, sizeof(Elf32_Word), aElfFd); |
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632 |
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633 for(aIndex=0; aIndex < iHashTbl->nBuckets; aIndex++) { |
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634 fwrite(&iDSOBuckets[aIndex], 1, sizeof(Elf32_Sword), aElfFd); |
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635 |
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636 } |
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637 for(aIndex=0; aIndex < iHashTbl->nChains; aIndex++) { |
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638 fwrite(&iDSOChains[aIndex], 1, sizeof(Elf32_Sword), aElfFd); |
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639 |
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640 } |
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641 |
|
642 //version def table |
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643 for(aIndex = 0; aIndex < 2; aIndex++) { |
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644 fwrite(&iVersionDef[aIndex], 1, sizeof(Elf32_Verdef), aElfFd); |
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645 fwrite(&iDSODaux[aIndex], 1, sizeof(Elf32_Verdaux), aElfFd); |
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646 } |
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647 |
|
648 //version table |
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649 for(aIndex = 0; aIndex < iNSymbols; aIndex++) { |
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650 fwrite(&iVersionTbl[aIndex], 1, sizeof(Elf32_Half), aElfFd ); |
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651 } |
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652 |
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653 if( iSections[VERSION_SECTION].sh_size %4 ) { |
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654 PLUINT32 aNPads = 4 - (iSections[VERSION_SECTION].sh_size %4); |
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655 PLUCHAR aPad = '\0'; |
|
656 while(aNPads--) { |
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657 fwrite(&aPad, 1, 1, aElfFd); |
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658 } |
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659 } |
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660 |
|
661 //string table |
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662 PLUINT32 aSz = iDSOSymNameStrTbl.size(); |
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663 char *aData = new char[aSz]; |
|
664 memcpy(aData, iDSOSymNameStrTbl.data(), aSz); |
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665 fwrite(aData, 1, aSz, aElfFd); |
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666 |
|
667 DELETE_PTR_ARRAY(aData); |
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668 |
|
669 //Sym table |
|
670 for(aIndex = 0; aIndex < iNSymbols; aIndex ++) { |
|
671 fwrite(&iElfDynSym[aIndex], 1, sizeof(Elf32_Sym), aElfFd); |
|
672 } |
|
673 |
|
674 //section header name table |
|
675 aSz = iDSOSectionNames.size(); |
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676 char *aData1 = new char[ aSz]; |
|
677 memcpy(aData1, iDSOSectionNames.data(), aSz); |
|
678 fwrite(aData1, 1, aSz, aElfFd); |
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679 DELETE_PTR_ARRAY(aData1); |
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680 |
|
681 //program header |
|
682 for(aIndex = 0; aIndex < 2; aIndex++) { |
|
683 fwrite(&iProgHeader[aIndex], 1, sizeof(Elf32_Phdr), aElfFd ); |
|
684 } |
|
685 |
|
686 fclose(aElfFd); |
|
687 } |
|
688 |