bintools/elftools/elftran/elf_tran.cpp
author Alex Gilkes <alex.gilkes@nokia.com>
Tue, 27 Oct 2009 16:36:35 +0000
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child 590 360bd6b35136
permissions -rw-r--r--
Convert Build package from SFL to EPL
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/*
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* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include <time.h>
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#include <malloc.h>
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#include <string.h>
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#include "elftran.h"
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#include <e32std.h>
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#include <elfdefs.h>
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#include "elffile.h"
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#include <h_ver.h>
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#include <h_utl.h>
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extern TUid gUid1, gUid2, gUid3;
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extern int gSetUid1, gSetUid2, gSetUid3;
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int gAlignConstSection=FALSE;
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TUint gConstSectionAddressMask=0;
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E32ImageFile* E32ImageFile::New()
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	{
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	return new E32ImageFile_ELF;
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	}
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E32ImageFile_ELF::E32ImageFile_ELF()
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	{
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	}
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E32ImageFile_ELF::~E32ImageFile_ELF()
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	{
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	}
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TInt E32ImageFile_ELF::DoCodeHeader(ELFFile &aElfFile)
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//
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// Calculate the code parts of the ELFFile
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//
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	{
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	TInt size=ALIGN4(aElfFile.GetCodeSize());
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	iHdr->iCodeSize = iHdr->iTextSize = size;
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	// make it the offset from the beginning of the file.....
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	if(iHdr->iExportDirCount==0)
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		iHdr->iExportDirOffset = 0;
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	else
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		iHdr->iExportDirOffset = aElfFile.GetExportTableOffset() + iHdr->iCodeOffset;
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	return size;
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	}
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TInt E32ImageFile_ELF::DoDataHeader(ELFFile &aElfFile, TUint aDataBase)
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	{
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	if (aDataBase==0 && aElfFile.iDataSegmentHdr)
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		aDataBase=aElfFile.iDataSegmentHdr->p_vaddr;
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	TInt size=0;
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	iHdr->iDataBase=aDataBase;
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	if (aElfFile.HasInitialisedData())
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		{
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	        size=ALIGN4(aElfFile.GetDataSize());
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		iHdr->iDataOffset = iHdr->iCodeOffset + iHdr->iCodeSize;
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		iHdr->iDataSize = size;
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		}
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	if (aElfFile.HasBssData())
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		{
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		iHdr->iBssSize = ALIGN4(aElfFile.GetBssSize());
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		}
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	return size;
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	}
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TInt E32ImageFile_ELF::CopyCode(char *p, ELFFile &aElfFile)
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//
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// Copies the files code sections to p
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// returns the number of bytes copied or KErrGeneral
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//
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	{
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	TInt size=aElfFile.GetCodeSize();
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	memcpy(p, (char *)aElfFile.GetCode(), size);
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	p+=ALIGN4(size);
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	return iHdr->iCodeSize = size;
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	}
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TInt E32ImageFile_ELF::CopyData(char *p, ELFFile &aElfFile)
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	{
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	TInt size=aElfFile.GetDataSize();
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	if (size) memcpy(p, (char *)aElfFile.GetData(), size);
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	return size;
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	}
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TInt E32ImageFile_ELF::Translate(const char* aFileName, TUint aDataBase, TBool aAllowDllData, \
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								 TBool aSymLkupEnabled)
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//
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// Translate a ELF format file to a E32Image file
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//
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{
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	iSource = EElfFile;
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	ELFFile elffile;
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	if (!elffile.Init((const TText * const)aFileName)) return KErrGeneral;
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	iFileName = strdup(aFileName);
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	Adjust(ALIGN4(sizeof(E32ImageHeaderV)));	// fixed for now because holes not supported
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	SetDefaultHeader();
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	iHdr->iDllRefTableCount = elffile.NumberOfImportDlls();
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	iHdr->iExportDirCount = elffile.NumberOfExports();
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	iHdr->iCodeBase = elffile.iLinkedBase;
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	if(aSymLkupEnabled)
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	{
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		if( !SetUpLookupTable(elffile) )
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			return KErrGeneral;
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	}
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	TInt size = ALIGN4(sizeof(E32ImageHeaderV));	// fixed for now because holes not supported
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	iHdr->iCodeOffset = size;
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	TInt pos = size;
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	size+=DoCodeHeader(elffile);
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	size += DoSymbolLookupHeader(elffile, size - pos);
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	TInt nimports=elffile.NumberOfImports();
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	TInt importSectionSize;
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	char *newImportSection=CreateImportSection(elffile, importSectionSize);
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	TInt t=DoDataHeader(elffile, aDataBase);
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	if (t>0)
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		{
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		iHdr->iDataOffset = size;
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		size += t;
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		}
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	if (importSectionSize!=0)
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		{
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		iHdr->iImportOffset=size;
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		size+=ALIGN4(importSectionSize);
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		}
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	char *newCodeRelocs=NULL;
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	char *newDataRelocs=NULL;
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	TInt codeRelocSize=0, dataRelocSize=0;
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	TInt nCodeRelocs=elffile.NumberOfCodeRelocs();
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	TInt nDataRelocs=elffile.NumberOfDataRelocs();
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	if (nCodeRelocs + nDataRelocs)
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		{
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		Elf32_Rel **codeRelocs=new Elf32_Rel * [nCodeRelocs];
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		Elf32_Rel **dataRelocs=new Elf32_Rel * [nDataRelocs];
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		if (!elffile.GetRelocs(codeRelocs, dataRelocs)) return KErrGeneral;
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   165
		       
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		FixRelocs(elffile, codeRelocs, dataRelocs);
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		if (elffile.iCodeSegmentHdr)
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			newCodeRelocs=CreateRelocs(elffile, codeRelocs, nCodeRelocs, codeRelocSize, elffile.iCodeSegmentHdr->p_vaddr);
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		if (elffile.iDataSegmentHdr)
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			newDataRelocs=CreateRelocs(elffile, dataRelocs, nDataRelocs, dataRelocSize, elffile.iDataSegmentHdr->p_vaddr);
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		if (codeRelocSize)
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			{
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			iHdr->iCodeRelocOffset = size;
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			size += codeRelocSize;
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			}
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		if (dataRelocSize)
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			{
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			iHdr->iDataRelocOffset = size;
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			size += dataRelocSize;
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			}
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		delete [] codeRelocs;
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		delete [] dataRelocs;
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		}
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	Adjust(size);
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	t=CopyCode(iData + pos, elffile);
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	if (t<0)
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		return KErrGeneral;
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   189
	pos += t;
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	t = CopyExportSymInfo(iData+pos, elffile);
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   191
	if (t<0)
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		return KErrGeneral;
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	pos += t;
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   194
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	pos += CopyData(iData + pos, elffile);
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   196
	if (nimports)
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		{
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		memcpy(iData + pos, newImportSection, importSectionSize);
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		pos += ALIGN4(importSectionSize);
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		}
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	if (codeRelocSize)
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		{
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		memcpy(iData + pos, newCodeRelocs, codeRelocSize);
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		pos += codeRelocSize;
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		}
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	if (dataRelocSize)
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		{
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		memcpy(iData + pos, newDataRelocs, dataRelocSize);
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		pos += dataRelocSize;
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		}
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   211
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	// locate the entry point
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	TUint entryPointOffset=elffile.GetEntryPointOffset();
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   214
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	// Arrange a header for this E32 Image
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   216
	iHdr->iCpuIdentifier = (TUint16)ECpuArmV4;
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	// Import format is ELF-derived
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	iHdr->iFlags |= KImageImpFmt_ELF;
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   219
	// ABI is ARM EABI
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   220
	iHdr->iFlags |= KImageABI_EABI;
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   221
	if (ImageIsDll(elffile))
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   222
		{
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   223
		iHdr->iFlags |= KImageDll;
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   224
		if (iHdr->iDataSize && !aAllowDllData)
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			return Print(EError, "Dll '%s' has initialised data.\n", iFileName);
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   226
		if (iHdr->iBssSize  && !aAllowDllData)
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			return Print(EError, "Dll '%s' has uninitialised data.\n", iFileName);
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   228
		}
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   229
	iHdr->iHeapSizeMin = elffile.iHeapCommittedSize;
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   230
	iHdr->iHeapSizeMax = elffile.iHeapReservedSize;
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   231
	iHdr->iStackSize = elffile.iStackCommittedSize;
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   232
	iHdr->iEntryPoint = entryPointOffset;
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   233
	TInt r = DetermineEntryPointType();
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   234
	if (r == KErrCorrupt)
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   235
		return Print(EError, "File '%s': Bad Entry Point.\n", iFileName);
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   236
	else if (r == KErrNotSupported)
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		return Print(EError, "File '%s': Bad Entry Point Type.\n", iFileName);
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   238
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   239
	SetUpExceptions(elffile);
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   240
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   241
	delete [] newImportSection;
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   242
	delete [] newCodeRelocs;
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   243
	delete [] newDataRelocs;
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   244
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   245
	return KErrNone;
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diff changeset
   246
	}
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   247
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   248
TBool E32ImageFile_ELF::Translate(ELFFile &aElfFile)
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   249
    {
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   250
    // VT fix for warning
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   251
    // fix warning in Linux
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   252
    return Translate((const char*)aElfFile.iFileName, 0, EFalse);
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   253
    }
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   254
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   255
TBool E32ImageFile_ELF::ImageIsDll(ELFFile& aElfFile)
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   256
    {
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   257
    return aElfFile.ImageIsDll();
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   258
    }
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   259
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   260
void E32ImageFile_ELF::SetUpExceptions(ELFFile &aElfFile)
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   261
    {
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   262
    aElfFile.GetExceptionIndexInfo(iHdr->iExceptionDescriptor);
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   263
    }
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   264
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   265
void E32ImageFile_ELF::SetSymNameLookup(TInt aSymNameLkupEnabled)
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   266
	{
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   267
	if(aSymNameLkupEnabled)
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   268
		iHdr->iFlags |= KImageNmdExpData;
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   269
	else
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   270
		iHdr->iFlags &= ~KImageNmdExpData;
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   271
	}
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   272
TBool E32ImageFile_ELF::IsNamedLookupEnabled()
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   273
{
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   274
	return (iHdr->iFlags & KImageNmdExpData);
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   275
}
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   276
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   277
TBool E32ImageFile_ELF::SetUpLookupTable(ELFFile &aElfFile)
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   278
// Symbol lookup by name is enabled. Create the symbol table with names
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   279
// and their values.
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   280
{
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   281
	if(!aElfFile.SetUpLookupTable() )
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   282
		return FALSE;
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   283
	SetSymNameLookup(TRUE);
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   284
	return TRUE;
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diff changeset
   285
}
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   286
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   287
// Build the infrastructure for symbol lookup via name
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   288
TInt E32ImageFile_ELF::DoSymbolLookupHeader(ELFFile &aElfFile, TInt aBaseOffset)
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   289
	{
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	if(!IsNamedLookupEnabled())
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		return 0;
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	aElfFile.SetLookupTblBase(aBaseOffset);
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	return aElfFile.GetLookupTblSize(); 
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	}
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TUint E32ImageFile_ELF::CopyExportSymInfo(char *p, ELFFile &aElfFile)
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	{
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	iHdr->iCodeSize += aElfFile.GetLookupTblSize();
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	iHdr->iTextSize = iHdr->iCodeSize ;
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	return aElfFile.GetSymLookupSection(p);
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	}