// 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:

//

#include "e32exporttable.h"

#include "pl_elfexecutable.h"

#include "pl_elfexports.h"

#include "pl_dllsymbol.h"

#include "pl_elflocalrelocation.h"

#include <cstring>

/**

Destructor for E32ExportTable class.

@internalComponent

@released

*/

E32ExportTable::~E32ExportTable()

{

	delete [] iTable;

}

/**

This function updates the e32 export table.

@param aElfExecutable - Elf executable

@param aExportList - export symbol list

@internalComponent

@released

*/

void E32ExportTable::CreateExportTable(ElfExecutable * aElfExecutable, ElfExports::ExportList & aExportList)

{

	iElfExecutable = aElfExecutable;

	// ELFExports::ExportList aExportList = aElfExecutable->GetExportsInOrdinalOrder();

	// The export table has a header containing the number of entries

	// before the entries themselves. So add 1 to number of exports

	iNumExports = aExportList.size();

	size_t aSize = iNumExports + 1;

	iSize = aSize * sizeof(MemAddr);

	iTable = new unsigned int[aSize];

	// Set up header

	iTable[0] = aExportList.size();

	Elf32_Phdr * aROHdr = aElfExecutable->iCodeSegmentHdr;

	// The export table starts after the header. NB this is a virtual address in the RO

	// segment of the E32Image. It is outside the ELF RO segment.

	Elf32_Addr * aPlace =  ELF_ENTRY_PTR(Elf32_Addr, aROHdr->p_vaddr, aROHdr->p_filesz) + 1;

	iExportTableAddress = (Elf32_Addr)aPlace;

	// Tell the E32Image constructor that it must allocate the export table

	// i.e. copy it from iTable.

	iAllocateP = true;

	bool aDelSym;

	ElfExports::ExportList::iterator first = aExportList.begin();

	for (PLUINT32 i = 1; i < aSize; i++, first++) 

	{

		Elf32_Sym * sym;

		unsigned int ptr;

		if ((*first)->Absent())

		{

			ptr = aElfExecutable->iEntryPoint;

			sym = new Elf32_Sym;

			memset(sym, 0, sizeof(Elf32_Sym));

			sym->st_value = ptr;

			aDelSym = true;

		}

		else

		{

			ptr = (*first)->iElfSym->st_value;

			sym = (*first)->iElfSym;

			aDelSym = false;

		}

		// set up the pointer

		iTable[i] = ptr;

		ElfLocalRelocation * aRel = new ElfLocalRelocation(iElfExecutable, (Elf32_Addr)aPlace++, 0, i, R_ARM_ABS32, NULL, ESegmentRO, sym, aDelSym);														   

		aRel->Add();

	}

}

/**

This function returns the number of exports.

@internalComponent

@released

*/

size_t E32ExportTable::GetNumExports()

{

	return iNumExports;

}

/**

This function tells the e32 image allocator if space is required to 

be allocated for export table.

@internalComponent

@released

*/

bool E32ExportTable::AllocateP(){ 

	return iAllocateP;

}

/**

This function returns the e32 export table size.

@internalComponent

@released

*/

size_t E32ExportTable::GetExportTableSize(){ 

	return iSize;

}

/**

This function returns e32 export table.

@internalComponent

@released

*/

unsigned int * E32ExportTable::GetExportTable() {

	 return iTable; 

}