/*

* Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*

*/

#if !defined(__ELFFILE_H__)

#define __ELFFILE_H__

#include <e32rom.h>

#include "e32ldfmt.h"

#include "elfdefs.h"

#define ELFADDR(rtype, p, o) (rtype *)(((char *)p) + o)

//

enum TImportStat {EImpError, EImpSuccess, EImpDone};

//

class ELFFile

	{

public:

	ELFFile();

	~ELFFile();

	TBool Init(const char* aFileName);

	void Close(void);

	char *CreateImportSection(TInt &aSize);

	TBool GetRelocs(Elf32_Rel **aCodeRelocs, Elf32_Rel **aDataRelocs);

	TUint16 GetRelocType(Elf32_Rel* aReloc);

	TInt NumberOfImports() const;

	TInt NumberOfImportDlls() const;

	TInt NumberOfExports() const;

	TInt NumberOfRelocs();

	TInt NumberOfCodeRelocs();

	TInt NumberOfDataRelocs();

public:

	TUint iCodeSize;

	TUint iDataSize;

	TUint iBssSize;

	TUint GetCodeSize();

	TBool HasInitialisedData();

	TUint GetDataSize();

	TBool HasBssData();

	TUint GetBssSize();

	Elf32_Phdr * GetSegment(TInt idx) {return &iPhdr[idx];}

	Elf32_Phdr * GetSegmentFromAddr(Elf32_Addr addr);

	char * GetCode() { return ELFADDR(char, iElfFile, iCodeSegmentHdr->p_offset); }

	char * GetData() { return ELFADDR(char, iElfFile, iDataSegmentHdr->p_offset); }

	TBool CodeSegmentP(Elf32_Phdr * s) { return (TBool)(s == iCodeSegmentHdr); }

	TBool CodeSegmentP(TInt idx) { return (TBool)(idx == iCodeSegmentIdx); }

	TInt CodeSegmentIndex() {return iCodeSegmentIdx;}

	TBool DataSegmentP(Elf32_Phdr * s) { return (TBool)(s == iDataSegmentHdr); }

	TBool DataSegmentP(TInt idx) { return (TBool)(idx == iDataSegmentIdx); }

	TInt DataSegmentIndex() {return iDataSegmentIdx;}

	TUint * CodePtrFromAddr(Elf32_Addr addr) { return PtrInSegment(iCodeSegmentHdr, addr); }

	TUint * DataPtrFromAddr(Elf32_Addr addr) { return PtrInSegment(iDataSegmentHdr, addr); }

	char * ELFFileBase() { return (char *) iElfFile; }

	TUint GetExportTableOffset(void);

	TUint GetEntryPointOffset(void) { return iElfFile->e_entry - iCodeSegmentHdr->p_vaddr; }

	TBool SymbolPresent(const char* s);

	Elf32_Sym * FindSymbol(const char* s);

	TBool GetExceptionIndexInfo(TUint32 &aOffset);

	TBool SetUpLookupTable();

	void SetLookupTblBase(TInt);

	TInt GetLookupTblSize();

	void GetExportSymInfoHeader(E32EpocExpSymInfoHdr& aSymInfoHdr);

	TUint GetSymLookupSection(char* aBuff);

private:

	TBool InitHeaders(void);

	TBool InitDllData(void);

	TUint * PtrInSegment(Elf32_Phdr * phdr, Elf32_Addr addr) 

	        { 

		return ELFADDR(TUint, ELFADDR(TUint, iElfFile, phdr->p_offset), (addr - phdr->p_vaddr));

		}

	TBool IsValidFileHeader(Elf32_Ehdr * aElfHdr);

	void CopySectionData(TAny *source, TAny *dest, TUint32 fileLength, TUint32 memLength);

	TBool ProcessRelocData(TAny *relocData,TInt dataSize);

	ELFFile(const ELFFile&);

	const ELFFile & operator = (const ELFFile&);

public:

	TBool	iImageIsDll;

	TBool	ImageIsDll() { return iImageIsDll; }

	Elf32_Addr iLinkedBase;

	TUint iEntryPoint;

	TUint iHeapCommittedSize;

	TUint iHeapReservedSize;

	TUint iStackCommittedSize;

	TUint iStackReservedSize;

private:

	friend class E32ImageFile;

	friend class E32ImageFile_ELF;

	char* iFileName;

	TInt32 iFileHandle;

	Elf32_Ehdr * iElfFile;

	Elf32_Phdr * iPhdr;

	Elf32_Phdr * iDynamicSegmentHdr;

	TInt iDynamicSegmentIdx;

	Elf32_Phdr * iCodeSegmentHdr;

	TInt iCodeSegmentIdx;

	Elf32_Phdr * iDataSegmentHdr;

	TInt iDataSegmentIdx;

	Elf32_Shdr * iSectionHeaderTable;

	TInt iSymIdx;

	Elf32_Sym * iSymTab;

	class ELFDllData;

	ELFDllData * iDllData;

	TCpu iCpu;

	};

#endif