// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// Class for E32 Image implementation and dump of the elf2e32 tool
// @internalComponent
// @released
// 
//

#ifndef E32IMAGEFILE_H
#define E32IMAGEFILE_H

#include "pl_elfrelocation.h"
#include "pl_elfrelocations.h"
#include "e32imagedefs.h"
#include "elfdefs.h"

#include <fstream>
#include <vector>
using std::vector;
#include <iostream>
using std::ifstream;

#include <e32std.h>

enum TFileSource
	{
	EE32Image=0,
	EPeFile=1,
	EElfFile=2,
	};

class ELFExecutable;
class ElfFileSupplied;

/**
Class E32ImageChunkDesc for different sections in the E32 image.
@internalComponent
@released
*/
class E32ImageChunkDesc
{
public:
	E32ImageChunkDesc(char * aData, size_t aSize, size_t aOffset, char * aDoc);
	virtual ~E32ImageChunkDesc();
	virtual void Write(char * aPlace);

public:
	char * iData;
	size_t iSize;
	size_t iOffset;
	char * iDoc;
};

/**
Class E32ImageChunks for a list of sections in the E32 image.
@internalComponent
@released
*/
class E32ImageChunks
{
public:

	typedef vector<E32ImageChunkDesc *> ChunkList;

public:
	E32ImageChunks();
	virtual ~E32ImageChunks();

	void AddChunk(char * aData, size_t aSize, size_t aOffset, char * aDoc);
	size_t GetOffset();
	void SetOffset(size_t aOffset);
	ChunkList & GetChunks();

public:
	ChunkList iChunks;

	size_t iOffset;

};

class ElfFileSupplied;

/**
Class E32ImageFile for fields of an E32 image.
@internalComponent
@released
*/
class E32ImageFile 
{
public:

	typedef unsigned char uint8;
	typedef unsigned short uint16;
	typedef unsigned long uint32;
	struct E32RelocPageDesc
	{
		uint32 aOffset;
		uint32 aSize;
	};

//public:
	E32ImageFile(const char * aFileName, ElfExecutable * aExecutable, ElfFileSupplied * aUseCase);
	virtual ~E32ImageFile();

	void GenerateE32Image();

	void ReadInputELFFile(const char * aName, size_t & aFileSize, Elf32_Ehdr * & aELFFile );

	void ProcessImports();
	const char * FindDSO(const char * aName);

	void ProcessRelocations();
	void ProcessCodeRelocations();
	void ProcessDataRelocations();
	void CreateRelocations(ElfRelocations::RelocationList & aRelocList, char * & aRelocs, size_t & aRelocSize);
	size_t RelocationsSize(ElfRelocations::RelocationList & aRelocList);

	uint16 GetE32RelocType(ElfRelocation * aReloc);

	void ConstructImage();

	virtual void InitE32ImageHeader();
	virtual size_t GetE32ImageHeaderSize();
	virtual size_t GetExtendedE32ImageHeaderSize();
	virtual void SetExtendedE32ImageHeaderSize(size_t aSize);

	virtual void ComputeE32ImageLayout();
	virtual size_t GetE32ImageSize();
	virtual size_t GetExportOffset();
	virtual void CreateExportBitMap();
	virtual void AddExportDescription();

	virtual void AllocateE32Image();
	virtual void FinalizeE32Image();
	virtual uint16 GetCpuIdentifier();
	virtual uint32 EntryPointOffset();

	enum EEntryPointStatus
	{
		EEntryPointOK,
		EEntryPointCorrupt,
		EEntryPointNotSupported
	};

	EEntryPointStatus ValidateEntryPoint();

	virtual void SetUpExceptions();
	virtual void SetUids();
	virtual void SetSecureId();
	virtual void SetVendorId();
	virtual void SetCallEntryPoints();
	virtual void SetCapability();
	virtual void SetPriority(bool isDllp);
	virtual void SetFixedAddress(bool isDllp);
	virtual void SetVersion();
	virtual void SetCompressionType();
	virtual void SetFPU();
	virtual void SetPaged();
	virtual void SetSymbolLookup();
	virtual void SetDebuggable();
	virtual void SetSmpSafe();

	void UpdateHeaderCrc();

	bool WriteImage(const char* aName);

public:
	const char* iFileName;

	char * iE32Image;
	uint8 * iExportBitMap;
	ElfExecutable * iElfExecutable;
	std::vector<char*> cleanupStack;
	char* iData;
	ElfFileSupplied * iUseCase;
	E32ImageHeaderV * iHdr;
	size_t iHdrSize;

	E32ImageChunks iChunks;

	uint32 iNumDlls;
	uint32 iNumImports;

	uint32 * iImportSection;
	size_t iImportSectionSize;

	char * iCodeRelocs;
	size_t iCodeRelocsSize;

	char * iDataRelocs;
	size_t iDataRelocsSize;

	size_t iExportOffset;
	bool iLayoutDone;

	int iMissingExports;
	
	// This table carries the byte offsets in the import table entries corresponding 
	// to the 0th ordinal entry of static dependencies.
	std::vector<int>	iImportTabLocations;
	std::vector<uint32>	iSymAddrTab;
	std::vector<uint32>	iSymNameOffTab;
	std::string			iSymbolNames;
	uint32				iSymNameOffset;

public:
	E32ImageFile();
	TInt ReadHeader(ifstream& is);
	TInt Open(const char* aFileName);
	void Adjust(TInt aSize, TBool aAllowShrink=ETrue);

	TUint TextOffset();
	TUint DataOffset();
	TUint BssOffset();
	TUint32 Capability();
	TUint32 Format();

	void Dump(const char* aFileName,TInt aDumpFlags);
	void DumpHeader(TInt aDumpFlags);
	void DumpData(TInt aDumpFlags);
	void DumpSymbolInfo(E32EpocExpSymInfoHdr *aSymInfoHdr);
	void E32ImageExportBitMap();
	TInt CheckExportDescription();
	void ProcessSymbolInfo();
	char* CreateSymbolInfo(size_t aBaseOffset);
	void SetSymInfo(E32EpocExpSymInfoHdr& aSymInfo);
public:
	inline TUint OrigCodeOffset() const {return OffsetUnadjust(iOrigHdr->iCodeOffset);}
	inline TUint OrigDataOffset() const {return OffsetUnadjust(iOrigHdr->iDataOffset);}
	inline TUint OrigCodeRelocOffset() const {return OffsetUnadjust(iOrigHdr->iCodeRelocOffset);}
	inline TUint OrigDataRelocOffset() const {return OffsetUnadjust(iOrigHdr->iDataRelocOffset);}
	inline TUint OrigImportOffset() const {return OffsetUnadjust(iOrigHdr->iImportOffset);}
	inline TUint OrigExportDirOffset() const {return OffsetUnadjust(iOrigHdr->iExportDirOffset);}
	inline TUint OffsetUnadjust(TUint a) const {return a ? a-iOrigHdrOffsetAdj : 0;}
	inline void OffsetAdjust(TUint& a) { if (a) a+=iOrigHdrOffsetAdj; }

public:

	TInt iSize;
	E32ImageHeader* iOrigHdr;
	TInt iError;
	TFileSource iSource;
	TUint iOrigHdrOffsetAdj;
	TInt iFileSize;

};

ifstream &operator>>(ifstream &is, E32ImageFile &aImage);
void InflateUnCompress(unsigned char* source, int sourcesize, unsigned char* dest, int destsize);


#endif // E32IMAGEFILE_H