e32tools/elf2e32/source/pl_elfexecutable.h
author timothy.murphy@nokia.com
Mon, 10 May 2010 13:58:23 +0100
branchfix
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Merge in resource performance improvements #2
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// Copyright (c) 2004-2009 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 "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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// Implementation of the Class ElfExecutable for the elf2e32 tool
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// @internalComponent
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// @released
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// 
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//
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#if !defined(_PL_ELFEXECUTABLE_H_)
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#define _PL_ELFEXECUTABLE_H_
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#include "pl_common.h"
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#include <list>
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#include <hash_map>
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#include "pl_elfimports.h"
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#include "pl_elfrelocations.h"
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#include "pl_elfexports.h"
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using std::list;
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using std::hash_map;
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class DllSymbol;
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class Symbol;
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class ElfRelocations;
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class ElfExports;
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class ParameterListInterface;
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class ElfLocalRelocation;
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/**
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This class is for ELF object carrying the elf header, sections, segments.
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@internalComponent
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@released
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*/
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class ElfExecutable
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{
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public:
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	ElfExecutable(ParameterListInterface *aParameterListInterface);
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	virtual ~ElfExecutable();
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	PLUINT32 ProcessElfFile(Elf32_Ehdr *aElfHdr);
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	void DumpElfFile(char* aFile);
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	PLUINT32 ProcessSymbols();
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	ElfImports::ImportMap GetImports();
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	ElfExports* GetExports();
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	DllSymbol* AddToExports(char* aDll, DllSymbol* aSymbol);
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	void AddToImports(ElfImportRelocation* aReloc);
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	PLUINT32 AddToRelocations(ElfRelocation* aReloc);
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	void AddToLocalRelocations(ElfRelocation* aReloc);
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	void ProcessVerInfo();
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	Elf32_Sym* FindSymbol(char* aSymName);
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	PLUINT32 GetSymbolOrdinal( char* aSymName);
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	PLUINT32 GetSymbolOrdinal( Elf32_Sym* );
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	char* GetSymbolName( PLUINT32 aSymIdx);
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	Elf32_Word GetRelocationOffset(ElfRelocation * aReloc);
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	Elf32_Word *GetRelocationPlace(ElfRelocation * aReloc);
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	Elf32_Word GetROBase();
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	Elf32_Word GetRWBase();
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	size_t GetROSize();
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	size_t GetRWSize();
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	size_t GetBssSize();
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	MemAddr GetRawROSegment();
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	MemAddr GetRawRWSegment();
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	Elf32_Word EntryPointOffset();
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	ESegmentType SegmentType(Elf32_Addr aAddr);
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	Elf32_Phdr* Segment(Elf32_Addr aAddr);
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	ElfRelocations::RelocationList & GetCodeRelocations();
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	ElfRelocations::RelocationList & GetDataRelocations();
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	ElfRelocations& GetLocalRelocations();
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	bool ExeceptionsPresentP();
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	ElfExports::ExportList& GetExportsInOrdinalOrder();
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	Elf32_Sym* LookupStaticSymbol(char * aName);
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public:
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	/**
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	 * The elf header pointer which points to the base of the file records
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	 */
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	Elf32_Ehdr	*iElfHeader;
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	Elf32_Addr	iEntryPoint;
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	/**
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	 * The dynamic program header of the elf file
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	 */
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	Elf32_Phdr	*iProgHeader;
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	PLUINT32	iSONameOffset;
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	char		*iSOName;
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	/**
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	 * This member points to the base of the section header table.
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	 */
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	Elf32_Shdr		*iSections;
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	Elf32_Verdef	*iVersionDef;
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	PLUINT32		iVerDefCount;
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	Elf32_Verneed	*iVersionNeed;
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	PLUINT32		iVerNeedCount;
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	Elf32_Half		*iVersionTbl;
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	PLUINT32		iRelSize;
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	PLUINT32		iRelEntSize;
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	PLUINT32		iNRelocs;
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	Elf32_Rel		*iRel;
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	PLUINT32		iRelaSize;
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	PLUINT32		iRelaEntSize;
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	Elf32_Rela		*iRela;
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	char			*iStringTable;
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	char			*iSectionHdrStrTbl;
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	list<char*>		iNeeded;
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	VersionInfo		*iVerInfo;
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	/**
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	 * The dynamic symbol array.
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	 */
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	Elf32_Sym		*iElfDynSym;//The ELF symbol
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	hash_map<PLUINT32, DllSymbol*>	iSymbolTable; //The representation
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	/**
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	 * The static symbol table.
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	 */
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	Elf32_Sym *iSymTab; 
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	char *iStrTab;
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	Elf32_Sym *iLim;
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	PLUINT32		iNSymbols;
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	Elf32_HashTable	*iHashTbl;
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	Elf32_Phdr		*iDynSegmentHdr;
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	Elf32_Phdr		*iDataSegmentHdr;
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	MemAddr			iDataSegment;
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	size_t			iDataSegmentSize;
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	PLUINT32		iDataSegmentIdx;
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	Elf32_Phdr		*iCodeSegmentHdr;
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	MemAddr			iCodeSegment;
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	size_t			iCodeSegmentSize;
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	PLUINT32		iCodeSegmentIdx;
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	ElfImports		iImports;
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	ElfExports		*iExports;
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	ElfRelocations  iLocalRelocations;
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	ParameterListInterface *iParameterListInterface;
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	PLUINT32		iPltGotBase;
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	PLUINT32		iPltGotLimit;
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	PLUINT32		iStrTabSz;
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	PLUINT32		iSymEntSz;
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	Elf32_Word		*iPltGot;
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	PLUINT32		iPltRelType;
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	Elf32_Rel		*iPltRel;
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	PLUINT32		iPltRelaSz;
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	Elf32_Rela		*iPltRela;
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	PLUINT32		iPltRelSz;
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	PLUINT32		iJmpRelOffset;
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	PLUINT32	ValidateElfFile();
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	PLUINT32	ProcessDynamicEntries();
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	void	ProcessRelocations();
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	template <class T> void	ProcessRelocations(T *aElfRel, size_t aSize);
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	VersionInfo* GetVersionInfo(PLUINT32 aIndex);
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	char*		SymbolDefinedInDll(PLUINT32 aSymbolIndex);
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	void SetVersionRecord( ElfRelocation* aReloc );
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/** This function says if the Symbol is a global symbol
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@return It returns true if the Symbol is a global one.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool GlobalSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol is Exported
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@return It returns true if the Symbol is an exported one.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool ExportedSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol is Imported
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@return It returns true if the Symbol is an imported one.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool ImportedSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol is a Code Symbol
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@return It returns true if the Symbol is of Code type.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool FunctionSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol is a Data Symbol
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@return It returns true if the Symbol is of Data type.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool DataSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol is Defined
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@return It returns true if the Symbol is defined.
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool DefinedSymbol(Elf32_Sym* aSym);
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/** This function says if the Symbol has a default Visibility
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@return It returns true if the Symbol has a default Visibility
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@param aSym The reference to the Symbol whose attribute is being checked
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*/
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bool VisibleSymbol(Elf32_Sym* aSym);
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/** This function finds the segment in which this address belongs
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@return the segment type
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@param aAddr The address within the executable
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*/
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Elf32_Word Addend(Elf32_Rel* aRel);
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Elf32_Word Addend(Elf32_Rela* aRel);
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char* SymbolFromDSO(PLUINT32  aSymbolIndex);
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Elf32_Word* GetFixupLocation(ElfLocalRelocation* aReloc, Elf32_Addr aPlace);
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ESegmentType Segment(Elf32_Sym *aSym);
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Elf32_Phdr* SegmentFromAbs(Elf32_Addr aAddr);
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Elf32_Phdr* Segment(ESegmentType aType);
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/** This function processes the linker generated Veneer symbols and
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 *  creates a relocation entry.
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 */
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void ProcessVeneers();
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/** This function processes the ELF file to find the static symbol table.
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*/
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void FindStaticSymbolTable();
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/** This function finds the .comment section
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@return the pointer to the comment section
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*/
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char* FindCommentSection();
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/** This function finds the value at the address passed in
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@return the value at the address passed in
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@param aAddr The address within the executable
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*/
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Elf32_Word FindValueAtLoc(Elf32_Addr aOffset);
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};
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#endif // !defined(_PL_ELFEXECUTABLE_H_)