/*

* Copyright (c) 1996-2009 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: 

* e32tools/e32image/e32image.cpp

* Basic operations on E32Image files which are used by ROMBUILD.

* These are independent of the original file format from which the

* E32Image file was derived.

*

*/

#include "h_utl.h"

#include <time.h>

#include <malloc.h>

#include <string.h>

#include <stdlib.h>

#if defined(__TOOLS2__) || defined(__MSVCDOTNET__) 

#define IOS_BASE ios_base

#include <fstream>

#else

#define IOS_BASE ios

#include <fstream.h>

#endif 

#include <assert.h>

#ifndef __LINUX__

  #include <io.h>

#endif

#include "h_ver.h"

// get E32ImageHeader class...

#define INCLUDE_E32IMAGEHEADER_IMPLEMENTATION

#define RETURN_FAILURE(_r) return (fprintf(stderr, "line %d\n", __LINE__),_r)

//#define E32IMAGEHEADER_TRACE(_t) printf _t

#include "e32image.h"

void DeflateCompress(char* bytes, TInt size, ostream& os);

void InflateUnCompress(unsigned char* source, int sourcesize, unsigned char* dest, int destsize);

void CompressPages(TUint8 * bytes, TInt size, ostream &os, CBytePair *aBPE);

int  DecompressPages(TUint8 * bytes, istream& is, CBytePair *aBPE);

// needed by E32ImageHeaderV::ValidateHeader...

void Mem::Crc32(TUint32& aCrc, const TAny* aPtr, TInt aLength)

	{

	HMem::Crc32(aCrc, aPtr, aLength);

	}

//

// E32 Image files

//

E32ImageFile::E32ImageFile(CBytePair *aBPE)

	: iData(NULL), iSize(0), iOrigHdr(NULL), iHdr(NULL), iFileName(NULL)

#ifndef __LINUX__

	  , iWideFileName(NULL)

#endif

, iError(0), iSource(EE32Image), iOrigHdrOffsetAdj(0), iExportBitMap(0), iBPE(aBPE)

	{

}

E32ImageFile::~E32ImageFile(){

	if(iData){

		free(iData);

		iData = 0 ;

	}

	if (iHdr && iHdr != iOrigHdr){

		delete iHdr;

		iHdr = 0 ;

	}

	if(iExportBitMap){

		delete []iExportBitMap;

		iExportBitMap = 0 ;

	}

	if(iFileName){

		delete []iFileName ;

		iFileName = 0;

	}

#ifndef __LINUX__

    if(iWideFileName){

		delete []iWideFileName ;

		iWideFileName = 0;

	}

#endif

}

// dummy implementation

TBool E32ImageFile::Translate(const char*, TUint, TBool, TBool)

	{

	return EFalse;

	}

Int64 timeToInt64(TInt aTime)

	{

	aTime-=(30*365*24*60*60+7*24*60*60);	// seconds since midnight Jan 1st, 2000

	Int64 daysTo2000AD=730497;

	Int64 t=daysTo2000AD*24*3600+aTime;	// seconds since 0000

	t=t+3600;								// BST (?)

	return t*1000000;						// milliseconds

	}

class TE32ImageUids : public TCheckedUid

	{

public:

	TE32ImageUids(TUint32 aUid1, TUint32 aUid2, TUint32 aUid3) : TCheckedUid(TUidType(TUid::Uid(aUid1), TUid::Uid(aUid2), TUid::Uid(aUid3))) {}

	TUint Check() { return TCheckedUid::Check(); }

	};

void E32ImageFile::SetDefaultHeader()

	{

	iHdr = (E32ImageHeaderV*)iOrigHdr;

	iHdr->iUid1 = 0;

	iHdr->iUid2 = 0;

	iHdr->iUid3 = 0;

	iHdr->iHeaderCrc = 0;

	iHdr->iSignature = 0x434f5045u;

	iHdr->iModuleVersion = 0x00010000u;

	iHdr->iCompressionType = 0;

	iHdr->iToolsVersion = TVersion(MajorVersion, MinorVersion, Build);

	Int64 time1(timeToInt64(time(0))); 

	iHdr->iTimeLo=(TUint32)time1;

	iHdr->iTimeHi=(TUint32)(time1>>32);

	iHdr->iFlags = KImageHdrFmt_V;

	iHdr->iCodeSize = 0;

	iHdr->iDataSize = 0;

	iHdr->iHeapSizeMin = 0;

	iHdr->iHeapSizeMax = 0;

	iHdr->iStackSize = 0;

	iHdr->iBssSize = 0;

	iHdr->iEntryPoint = 0;

	iHdr->iCodeBase = 0;

	iHdr->iDataBase = 0;

	iHdr->iDllRefTableCount = 0;

	iHdr->iExportDirOffset = 0;

	iHdr->iExportDirCount = 0;

	iHdr->iTextSize = 0;

	iHdr->iCodeOffset = 0;

	iHdr->iDataOffset = 0;

	iHdr->iImportOffset = 0;

	iHdr->iCodeRelocOffset = 0;

	iHdr->iDataRelocOffset = 0;

	iHdr->iProcessPriority = (TUint16)EPriorityForeground;

	iHdr->iUncompressedSize = 0;

	iHdr->iS.iSecureId = 0;

	iHdr->iS.iVendorId = 0;

	iHdr->iExceptionDescriptor = 0;

	iHdr->iSpare2 = 0;

	iHdr->iExportDescSize = 0;

	iHdr->iExportDescType = KImageHdr_ExpD_NoHoles;

	iHdr->iExportDesc[0] = 0;

	}

void E32ImageFile::SetCallEntryPoints(TInt aBool)

	{

	if (aBool)

		iHdr->iFlags&=~KImageNoCallEntryPoint;

	else

		iHdr->iFlags|=KImageNoCallEntryPoint;

	}

void E32ImageFile::SetFixedAddress(TInt aBool)

	{

	if (aBool)

		iHdr->iFlags|=KImageFixedAddressExe;

	else

		iHdr->iFlags&=~KImageFixedAddressExe;

	}

void E32ImageFile::SetPriority(TProcessPriority aPri)

	{

	iHdr->iProcessPriority = (TUint16)aPri;

	}

void E32ImageFile::SetCapability(SCapabilitySet& aCapabilities)

	{

	iHdr->iS.iCaps = aCapabilities;

	}

void E32ImageFile::SetFPU(unsigned int aFPU)

	{

	iHdr->iFlags &=~ KImageHWFloatMask;

	if (aFPU == 1)

		iHdr->iFlags |= KImageHWFloat_VFPv2;

	}

void E32ImageFile::Adjust(TInt aSize, TBool aAllowShrink)

//

// Adjust the size of allocated data and fix the member data

//

	{

	TInt asize = ALIGN4(aSize);

	if (asize == iSize)

		return;

	if (iSize == 0)

		{

		iSize = asize;

		iData = (char*)malloc(iSize);

		memset(iData, 0, iSize);

		}

	else if (aAllowShrink || asize > iSize)

		{

		TInt oldsize = iSize;

		iSize = asize;

		iData = (char*)realloc(iData, iSize);

		if (iSize > oldsize)

			memset(iData+oldsize, 0, iSize-oldsize);

		}

	if (!iData)

		iSize = 0;

	if (iHdr && iHdr == iOrigHdr)

		iHdr = (E32ImageHeaderV*)iData;

	iOrigHdr = (E32ImageHeader*)iData;

	}

TInt E32ImageFile::ReadHeader(ifstream& is)

	{

	Adjust(sizeof(E32ImageHeader), EFalse);

	is.read(iData, sizeof(E32ImageHeader));

	TInt hdrsz = iOrigHdr->TotalSize();

	if (hdrsz > 0x10000 || hdrsz <= 0)

		return KErrCorrupt;	// sanity check

	if (hdrsz > (TInt)sizeof(E32ImageHeader))

		{

		Adjust(hdrsz, EFalse);

		is.read(iData+sizeof(E32ImageHeader), hdrsz-sizeof(E32ImageHeader));

		}

	TUint32 uncompressedSize;

	TInt r = iOrigHdr->ValidateHeader(iFileSize,uncompressedSize);

	if (r != KErrNone)

		{

		fprintf(stderr, "Integrity check failed %d\n", r);

		return r;

		}

	iHdr = (E32ImageHeaderV*)iOrigHdr;

	return KErrNone;

	}

void E32ImageFile::SetStackSize(TInt aSize)

	{

	iHdr->iStackSize=aSize;

	}

void E32ImageFile::SetHeapSizeMin(TInt aSize)

	{

	iHdr->iHeapSizeMin=aSize;

	}

void E32ImageFile::SetHeapSizeMax(TInt aSize)

	{

	iHdr->iHeapSizeMax=aSize;

	}

TUint E32ImageFile::TextOffset()

//

// Return the offset of the text section

//

	{

	return 0;

	}

TUint E32ImageFile::DataOffset()

//

// return the offset of the initialised data

//

	{

	return iHdr->iCodeSize;

	}

TUint E32ImageFile::BssOffset()

//

// return the offset from the start of code where the bss is linked

//

	{

	return DataOffset()+iHdr->iDataSize;

	}

TInt E32ImageFile::IsDll()

//

//

//

	{

	return iHdr->iFlags&KImageDll;

	}

void E32ImageFile::RelocateSection(char* aPtr, char* aRelocs, TUint aCodeDelta, TUint aDataDelta, char* aImagePtr, TLinAddr** aIATRefs, TBool keepIAT)

//

// Relocates the section data at aPtr

//	

	{

	TUint codeStart=iHdr->iCodeBase;

	TUint codeFinish=codeStart+iHdr->iCodeSize;

	TUint iatStart = aIATRefs ? codeStart+iHdr->iTextSize : 0;

	TUint iatFinish = aIATRefs ? iatStart+NumberOfImports()*sizeof(TUint) : 0;

	char* relocs=aRelocs;

	TUint page=0;

	TInt size=0;

	TInt i=((E32RelocSection *)relocs)->iNumberOfRelocs;

	relocs+=sizeof(E32RelocSection);

	while (i>0)

		{

		if (size>0)

			{

			TUint offset=*(TUint16 *)relocs;

			relocs+=2;

			if (offset!=0)

				{ // its a reloc

				TUint va=page+(offset&0x0fff);

				TUint relocType=offset&0xf000;

				TUint *dataptr=(TUint *)(aPtr+va);

				assert((char *)dataptr < aRelocs);

				TUint data=*dataptr;

				if (relocType == KTextRelocType) 

					*dataptr=data+aCodeDelta; // points to text/rdata section

				else if (relocType == KDataRelocType)

					*dataptr=data+aDataDelta;

				else 

					{

					if (relocType != KInferredRelocType)

						Print(EError,"Unrecognized relocation type %x\n",relocType);

					if (data>=iatStart && data<iatFinish)

						{

						TUint iatNum = (data-iatStart)/sizeof(TLinAddr);

						// If "keepIAT" is used then the importing instruction must import through the IAT entry,

						// but otherwise we change the IAT entry to point to the bit of code doing the importing

						// and do the real fix-up later on in TRomBuilderEntry::FixupImports.

						// NB: We always want to do this for X86 or data exports dont work.

						if (keepIAT || (iHdr->iCpuIdentifier & 0x1000) /*denotes X86*/) 

							*dataptr=data+aCodeDelta; 

						else 

							{

							if ((TUint)aIATRefs[iatNum]>65535)

								Print(EWarning, "Multiple relocations for IAT entry %d (0x%x, 0x%x)\n",

										iatNum, aIATRefs[iatNum], dataptr);

							else

								aIATRefs[iatNum] = (TLinAddr*)(aImagePtr+va);	// ROM image address of importing pointer					

							}

						}

					else if (data>=codeStart && data<codeFinish)

						*dataptr=data+aCodeDelta; // points to text/rdata section

					else

						*dataptr=data+aDataDelta; // points to data section

					}

				--i;

				}

			size-=2;

			}

		else

			{ // next page of relocs

			page=*(TUint *)relocs;

			relocs+=4;

			size=*(TUint *)relocs;

			relocs+=4;

			size-=8;

			}

		}

	}

void E32ImageFile::SetUids(TUid aUid1, TUid aUid2, TUid aUid3)

	{

	iHdr->iUid1=aUid1.iUid;

	iHdr->iUid2=aUid2.iUid;

	iHdr->iUid3=aUid3.iUid;

	}

void E32ImageFile::SetSecureId(TUint32 aId)

	{

	((E32ImageHeaderV*)iHdr)->iS.iSecureId = aId;

	}

void E32ImageFile::SetVendorId(TUint32 aId)

	{

	((E32ImageHeaderV*)iHdr)->iS.iVendorId = aId;

	}

void E32ImageFile::UpdateHeaderCrc()

	{

	TE32ImageUids u(iHdr->iUid1, iHdr->iUid2, iHdr->iUid3);

	iHdr->iUidChecksum = u.Check();

	TInt hdrsz = iHdr->TotalSize();

	TInt orighdrsz = iOrigHdr->TotalSize();

	iHdr->iUncompressedSize = iSize - orighdrsz;

	iHdr->iHeaderCrc = KImageCrcInitialiser;

	TUint32 crc = 0;

	HMem::Crc32(crc, iHdr, hdrsz);

	iHdr->iHeaderCrc = crc;

	}

TInt E32ImageFile::NumberOfImports()

//

// Return the number of imports made by this image

//

	{

	if (iHdr->iDllRefTableCount==0 || iHdr->iImportOffset==0)

		return 0;

	TUint impfmt = iHdr->ImportFormat();

	const E32ImportSection* isection = (const E32ImportSection*)(iData + iOrigHdr->iImportOffset);

	TInt d;

	TInt nImports = 0;

	const E32ImportBlock* b = (const E32ImportBlock*)(isection+1);

	for (d=0; d<iHdr->iDllRefTableCount; d++)

		{

		nImports += b->iNumberOfImports;

		b = b->NextBlock(impfmt);

		}

	if (impfmt==KImageImpFmt_PE || impfmt==KImageImpFmt_PE2)

		{

		TUint *imports=(TUint *)(iData + iOrigHdr->iCodeOffset + iHdr->iTextSize);

		TInt i=0;

		while (*imports++)

			i++;

		assert(i==nImports);

		}

	return nImports;

	}

// Work out which exports are missing from the export directory

void E32ImageFile::CreateExportBitMap()

	{

	TInt nexp = iOrigHdr->iExportDirCount;

	TInt memsz = (nexp + 7) >> 3;

	iExportBitMap = new TUint8[memsz];

	memset(iExportBitMap, 0xff, memsz);

	TUint* exports = (TUint*)(iData + iOrigHdr->iExportDirOffset);

	TUint absoluteEntryPoint = iOrigHdr->iEntryPoint + iOrigHdr->iCodeBase;

	TUint impfmt = iOrigHdr->ImportFormat();

	TUint hdrfmt = iOrigHdr->HeaderFormat();

	TUint absentVal = (impfmt == KImageImpFmt_ELF) ? absoluteEntryPoint : iOrigHdr->iEntryPoint;

	TInt i;

	iMissingExports = 0;

	for (i=0; i<nexp; ++i)

		{

		if (exports[i] == absentVal)

			{

			iExportBitMap[i>>3] &= ~(1u << (i & 7));

			++iMissingExports;

			}

		}

	if (hdrfmt < KImageHdrFmt_V && iMissingExports)

		{

		fprintf(stderr, "Bad exports\n");

		exit(999);

		}

	}

// Append an export description to the E32ImageHeader if necessary

void E32ImageFile::AddExportDescription()

	{

	if (iMissingExports == 0)

		return;	// nothing to do

	TInt nexp = iOrigHdr->iExportDirCount;

	TInt memsz = (nexp + 7) >> 3;	// size of complete bitmap

	TInt mbs = (memsz + 7) >> 3;	// size of meta-bitmap

	TInt nbytes = 0;

	TInt i;

	for (i=0; i<memsz; ++i)

		if (iExportBitMap[i] != 0xff)

			++nbytes;				// number of groups of 8

	TUint8 edt = KImageHdr_ExpD_FullBitmap;

	TInt extra_space = memsz - 1;

	if (mbs + nbytes < memsz)

		{

		edt = KImageHdr_ExpD_SparseBitmap8;

		extra_space = mbs + nbytes - 1;

		}

	extra_space = (extra_space + sizeof(TUint) - 1) &~ (sizeof(TUint) - 1);

	TInt hdrsz = sizeof(E32ImageHeaderV) + extra_space;

	iHdr = (E32ImageHeaderV*)malloc(hdrsz);

	memcpy(iHdr, iOrigHdr, sizeof(E32ImageHeaderV));