// 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"

/**
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; 
}