sl@0: // Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // e32\memmodel\epoc\moving\mprocess.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "memmodel.h"
sl@0: #include "cache_maintenance.h"
sl@0: #include "mmboot.h"
sl@0: 
sl@0: #define iMState		iWaitLink.iSpare1
sl@0: 
sl@0: _LIT(KDollarDat,"$DAT");
sl@0: _LIT(KLitDllDollarData,"DLL$DATA");
sl@0: 
sl@0: /********************************************
sl@0:  * Process
sl@0:  ********************************************/
sl@0: void DMemModelProcess::Destruct()
sl@0: 	{
sl@0: 	NKern::LockSystem();
sl@0: 	if (this==TheCurrentAddressSpace)
sl@0: 		TheCurrentAddressSpace=NULL;
sl@0: 	if (this==TheCurrentVMProcess)
sl@0: 		TheCurrentVMProcess=NULL;
sl@0: 	if (this==TheCurrentDataSectionProcess)
sl@0: 		TheCurrentDataSectionProcess=NULL;
sl@0: 	if (this==TheCompleteDataSectionProcess)
sl@0: 		TheCompleteDataSectionProcess=NULL;
sl@0: 	NKern::UnlockSystem();
sl@0: 	DProcess::Destruct();
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::NewChunk(DChunk*& aChunk, SChunkCreateInfo& aInfo, TLinAddr& aRunAddr)
sl@0: 	{
sl@0: 	aChunk=NULL;
sl@0: 	DMemModelChunk* pC=NULL;
sl@0: 	TInt r=GetNewChunk(pC,aInfo);
sl@0: 	if (r!=KErrNone)
sl@0: 		{
sl@0: 		if (pC)
sl@0: 			pC->Close(NULL);
sl@0: 		return r;
sl@0: 		}
sl@0: 	if (aInfo.iForceFixed || iAttributes & DMemModelProcess::EFixedAddress)
sl@0: 		pC->iAttributes |= DMemModelChunk::EFixedAddress;
sl@0: 	if (!aInfo.iGlobal && (iAttributes & DMemModelProcess::EPrivate)!=0)
sl@0: 		pC->iAttributes |= DMemModelChunk::EPrivate;
sl@0: 	if (pC->iChunkType==EDll || pC->iChunkType==EUserCode || pC->iChunkType==EUserSelfModCode || pC->iChunkType==EKernelCode)
sl@0: 		pC->iAttributes |= (DMemModelChunk::EFixedAddress|DMemModelChunk::ECode);
sl@0: 	pC->iOwningProcess=(aInfo.iGlobal)?NULL:this;
sl@0: 	r=pC->Create(aInfo);
sl@0: 	if (r==KErrNone && (aInfo.iOperations & SChunkCreateInfo::EAdjust))
sl@0: 		{
sl@0: 		if (aInfo.iRunAddress!=0)
sl@0: 			pC->SetFixedAddress(aInfo.iRunAddress,aInfo.iPreallocated);
sl@0: 		if (aInfo.iPreallocated==0)
sl@0: 			{
sl@0: 			if (pC->iAttributes & DChunk::EDisconnected)
sl@0: 				{
sl@0: 				r=pC->Commit(aInfo.iInitialBottom,aInfo.iInitialTop-aInfo.iInitialBottom);
sl@0: 				}
sl@0: 			else if (pC->iAttributes & DChunk::EDoubleEnded)
sl@0: 				{
sl@0: 				r=pC->AdjustDoubleEnded(aInfo.iInitialBottom,aInfo.iInitialTop);
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				r=pC->Adjust(aInfo.iInitialTop);
sl@0: 				}
sl@0: 			}
sl@0: 		if (r==KErrNone && pC->iHomeRegionBase==0 && (pC->iAttributes&DMemModelChunk::EFixedAddress)!=0)
sl@0: 			{
sl@0: 			r=pC->Reserve(0);
sl@0: 			aRunAddr=(TLinAddr)pC->Base();
sl@0: 			}
sl@0: 		}
sl@0: 	if (r==KErrNone && (aInfo.iOperations & SChunkCreateInfo::EAdd))
sl@0: 		{
sl@0: 		if (pC->iAttributes & DMemModelChunk::ECode)
sl@0: 			Mmu::Get().SyncCodeMappings();
sl@0: 		if (pC->iChunkType!=EUserCode)
sl@0: 			{
sl@0: 			r=WaitProcessLock();
sl@0: 			if (r==KErrNone)
sl@0: 				{
sl@0: 				r=AddChunk(pC,aRunAddr,EFalse);
sl@0: 				SignalProcessLock();
sl@0: 				}
sl@0: 			}
sl@0: 		else
sl@0: 			aRunAddr=(TLinAddr)pC->Base();	// code chunks always fixed address
sl@0: 		}
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		pC->iDestroyedDfc = aInfo.iDestroyedDfc;
sl@0: 		aChunk=(DChunk*)pC;
sl@0: 		}
sl@0: 	else
sl@0: 		pC->Close(NULL);	// NULL since chunk can't have been added to process
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::DoCreate(TBool aKernelProcess, TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::DoCreate %O",this));
sl@0: 
sl@0: 	if (aKernelProcess)
sl@0: 		iAttributes=ESupervisor|EFixedAddress|EPrivate;
sl@0: 	else if (aInfo.iAttr & ECodeSegAttFixed)
sl@0: 		iAttributes=EFixedAddress|EPrivate;
sl@0: 	else
sl@0: 		iAttributes=0;
sl@0: 	if ((iAttributes & ESupervisor)==0 && (iAttributes & EFixedAddress)!=0)
sl@0: 		{
sl@0: 		CheckForFixedAccess();
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::CreateDataBssStackArea(TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::CreateDataBssStackArea %O",this));
sl@0: 	TInt dataBssSize=Mmu::RoundToPageSize(aInfo.iTotalDataSize);
sl@0: 	TInt maxSize=dataBssSize+PP::MaxStackSpacePerProcess;
sl@0: 	TBool fixed=(iAttributes & EFixedAddress);
sl@0: 
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DataBssSize=%x, chunk max size %x",dataBssSize,maxSize));
sl@0: 
sl@0: 	SChunkCreateInfo cinfo;
sl@0: 	cinfo.iGlobal=EFalse;
sl@0: 	cinfo.iAtt=TChunkCreate::EDisconnected;
sl@0: 	cinfo.iForceFixed=EFalse;
sl@0: 	cinfo.iOperations=SChunkCreateInfo::EAdjust|SChunkCreateInfo::EAdd;
sl@0: 	cinfo.iType=EUserData;
sl@0: 	cinfo.iMaxSize=maxSize;
sl@0: 	cinfo.iInitialBottom=0;
sl@0: 	cinfo.iInitialTop=dataBssSize;
sl@0: 	cinfo.iPreallocated=0;
sl@0: 	cinfo.iName.Set(KDollarDat);
sl@0: 	cinfo.iOwner=this;
sl@0: 	if (fixed && dataBssSize!=0 && aInfo.iCodeLoadAddress)
sl@0: 		{
sl@0: 		const TRomImageHeader& rih=*(const TRomImageHeader*)aInfo.iCodeLoadAddress;
sl@0: 		cinfo.iRunAddress=rih.iDataBssLinearBase;
sl@0: 		}
sl@0: 	else
sl@0: 		cinfo.iRunAddress=0;
sl@0: 	TInt r=NewChunk((DChunk*&)iDataBssStackChunk,cinfo,iDataBssRunAddress);
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::AddChunk(DChunk* aChunk,TBool isReadOnly)
sl@0: 	{
sl@0: 	DMemModelChunk* pC=(DMemModelChunk*)aChunk;
sl@0: 	TInt r=WaitProcessLock();
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		TInt pos=0;
sl@0: 		r=ChunkIndex(pC,pos);
sl@0: 		TLinAddr dataSectionBase=0;
sl@0: 		if (r==0) // Found the chunk in this process, just up its count
sl@0: 			{
sl@0: 			iChunks[pos].iAccessCount++;
sl@0: 			__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AddChunk %08x to %08x (Access count incremented to %d)",aChunk,this,iChunks[pos].iAccessCount));
sl@0: 			SignalProcessLock();
sl@0: 			return KErrNone;
sl@0: 			}
sl@0: 		r=AddChunk(pC,dataSectionBase,isReadOnly);
sl@0: 		SignalProcessLock();
sl@0: 		}
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AddChunk returns %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: void FlushBeforeChunkMove(DMemModelChunk* aChunk)
sl@0: 	{
sl@0: 	Mmu& m = Mmu::Get();
sl@0: 	TUint32 ff=Mmu::EFlushDMove|Mmu::EFlushDPermChg;
sl@0: 	if (aChunk->iAttributes & DMemModelChunk::ECode)		// assumption here that code chunks don't move
sl@0: 		ff |= Mmu::EFlushIPermChg;
sl@0: 	m.GenericFlush(ff);
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::AddChunk(DMemModelChunk* aChunk, TLinAddr& aDataSectionBase, TBool isReadOnly)
sl@0: 	{
sl@0: 	//
sl@0: 	// Must hold the process $LOCK mutex before calling this
sl@0: 	//
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AddChunk %08x to %08x (for first time)",aChunk,this));
sl@0: 	TInt r=AllocateDataSectionBase(*((DMemModelChunk*)aChunk),(TUint&)aDataSectionBase);
sl@0: 	if(r!=KErrNone)
sl@0: 		return r;
sl@0: 
sl@0: 	if (iNumChunks==KMaxChunksInProcess)
sl@0: 		return KErrOverflow;		// too many chunks in the process
sl@0: 
sl@0: 	SChunkInfo *pC=iChunks;
sl@0: 	SChunkInfo *pE=pC+iNumChunks-1;
sl@0: 	NKern::LockSystem();
sl@0: 	while(pE>=pC && TUint(pE->iDataSectionBase)>TUint(aDataSectionBase))
sl@0: 		{
sl@0: 		pE[1]=pE[0];
sl@0: 		pE--;
sl@0: 		}
sl@0: 	pC=pE+1;
sl@0: 	pC->iDataSectionBase=aDataSectionBase;
sl@0: 	pC->isReadOnly=isReadOnly;
sl@0: 	pC->iAccessCount=1;
sl@0: 	pC->iChunk=aChunk;
sl@0: 	iNumChunks++;
sl@0: 
sl@0: 	if(!(iAttributes&ESupervisor))
sl@0: 		{
sl@0: 		TInt attribs=aChunk->iAttributes;
sl@0: 		if (!(attribs&DMemModelChunk::EFixedAddress))
sl@0: 			{
sl@0: 			iNumMovingChunks++;
sl@0: 			iAttributes |= EMoving;
sl@0: 			}
sl@0: 
sl@0: 		if (attribs&DMemModelChunk::EFixedAccess)
sl@0: 			{
sl@0: 			NKern::UnlockSystem();
sl@0: 			AddFixedAccessChunk(aChunk);
sl@0: 			goto done;	// FINISHED
sl@0: 			}
sl@0: 
sl@0: 		iAttributes |= EVariableAccess;
sl@0: 		if (attribs & DMemModelChunk::ECode)
sl@0: 			{
sl@0: 			iNumNonFixedAccessCodeChunks++;
sl@0: 			iAttributes |= EVariableCode;
sl@0: 			}
sl@0: 		if (++iNumNonFixedAccessChunks==1)
sl@0: 			{
sl@0: 			NKern::UnlockSystem();
sl@0: 			DoAttributeChange();	// change process from fixed to variable access
sl@0: 			NKern::LockSystem();
sl@0: 			}
sl@0: 
sl@0: 		if (this!=TheCurrentThread->iOwningProcess)
sl@0: 			{
sl@0: 			// Adding chunk to another process
sl@0: 			if (this==TheCurrentDataSectionProcess && !(attribs&DMemModelChunk::EFixedAddress))
sl@0: 				TheCompleteDataSectionProcess=NULL;	// just set partial state change flag and leave chunk alone
sl@0: 			if (this==TheCurrentAddressSpace)
sl@0: 				TheCurrentAddressSpace=NULL;
sl@0: 			NKern::UnlockSystem();
sl@0: 			goto done;	// FINISHED
sl@0: 			}
sl@0: 
sl@0: 		// Adding chunk to currently active user process
sl@0: 		{
sl@0: 		TheCurrentAddressSpace=NULL;
sl@0: 		Mmu& m = Mmu::Get();
sl@0: 		TUint32 ff=0;	// flush flags
sl@0: 		DMemModelChunk::TChunkState state=isReadOnly?DMemModelChunk::ERunningRO:DMemModelChunk::ERunningRW;
sl@0: 		if (attribs&DMemModelChunk::EFixedAddress)
sl@0: 			{
sl@0: 			// Fixed address chunk, just change permissions
sl@0: 			ff|=aChunk->ApplyTopLevelPermissions(state);
sl@0: 			}
sl@0: 		else if (this==TheCurrentDataSectionProcess)
sl@0: 			{
sl@0: 			// Moving chunk.
sl@0: 			// This process is already in the data section, so just move the chunk down.
sl@0: 			// Must do flushing first
sl@0: 			TheCompleteDataSectionProcess=NULL;
sl@0: 			FlushBeforeChunkMove(aChunk);
sl@0: 			aChunk->MoveToRunAddress(aDataSectionBase,state);	// idempotent
sl@0: 			TheCompleteDataSectionProcess=this;
sl@0: 			}
sl@0: 		else if (iNumMovingChunks==1)
sl@0: 			{
sl@0: 			// The first moving chunk being added to a process with the data section occupied by another process.
sl@0: 			// This is the problematic case - we must displace the other process from the data section.
sl@0: 			// However we must allow preemption after each chunk is moved. Note that if a reschedule does
sl@0: 			// occur the necessary chunk moves will have been done by the scheduler, so we can finish
sl@0: 			// immediately.
sl@0: 			// Must do cache flushing first
sl@0: 			m.GenericFlush(Mmu::EFlushDMove);
sl@0: 			if (TheCurrentDataSectionProcess)
sl@0: 				{
sl@0: 				if (TheCurrentDataSectionProcess->iAttributes & EVariableCode)
sl@0: 					ff |= Mmu::EFlushIPermChg;
sl@0: 				SChunkInfo* pOtherProcChunks=TheCurrentDataSectionProcess->iChunks;
sl@0: 				SChunkInfo* pEndOtherProcChunks=pOtherProcChunks+TheCurrentDataSectionProcess->iNumChunks;
sl@0: 				NKern::FlashSystem();
sl@0: 				// if a reschedule occurs, TheCompleteDataSectionProcess will become equal to this
sl@0: 				while (TheCompleteDataSectionProcess!=this && pOtherProcChunks<pEndOtherProcChunks)
sl@0: 					{
sl@0: 					DMemModelChunk *pChunk=pOtherProcChunks->iChunk;
sl@0: 					pChunk->MoveToHomeSection();
sl@0: 					++pOtherProcChunks;
sl@0: 					TheCompleteDataSectionProcess=NULL;
sl@0: 					NKern::FlashSystem();
sl@0: 					}
sl@0: 				}
sl@0: 			if (TheCompleteDataSectionProcess!=this)
sl@0: 				{
sl@0: 				if (attribs & DMemModelChunk::ECode)
sl@0: 					ff |= Mmu::EFlushIPermChg;
sl@0: 				aChunk->MoveToRunAddress(aDataSectionBase,state);
sl@0: 				TheCurrentDataSectionProcess=this;
sl@0: 				TheCompleteDataSectionProcess=this;
sl@0: 				}
sl@0: 			}
sl@0: 		TheCurrentAddressSpace=this;
sl@0: 		TheCurrentVMProcess=this;
sl@0: 		if (ff)
sl@0: 			m.GenericFlush(ff);
sl@0: 		}
sl@0: 	}
sl@0: 	NKern::UnlockSystem();
sl@0: done:
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("Added array entry for %x",aDataSectionBase));
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("Chunks maxsize %x",pC->iChunk->MaxSize()));
sl@0: 	__DEBUG_EVENT(EEventUpdateProcess, this);
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::AllocateDataSectionBase(DMemModelChunk& aChunk, TUint& aBase)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AllocateDataSectionBase"));
sl@0: 	aBase=0;
sl@0: 	if ((aChunk.iAttributes & DMemModelChunk::EPrivate) && this!=aChunk.iOwningProcess)
sl@0: 		return KErrAccessDenied;
sl@0: 	if (aChunk.iAttributes & DMemModelChunk::EFixedAddress)
sl@0: 		{
sl@0: 		aBase=aChunk.iHomeRegionBase;
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	Mmu& m = Mmu::Get();
sl@0: 	TLinAddr base=0;
sl@0: 	TLinAddr maxBase=0;
sl@0: 	switch (aChunk.iChunkType)
sl@0: 		{
sl@0: 	case EUserData:
sl@0: 		base=m.iDataSectionBase;
sl@0: 		maxBase=m.iDllDataBase;
sl@0: 		break;
sl@0: 	case EUserCode:
sl@0: 	case EUserSelfModCode:
sl@0: 		MM::Panic(MM::EUserCodeNotFixed);
sl@0: 		break;
sl@0: 	case EDllData:
sl@0: 		aBase=m.iDllDataBase;
sl@0: 		return KErrNone;
sl@0: 	default:
sl@0: 		__KTRACE_OPT(KPANIC,Kern::Printf("DMemModelProcess::AllocateDataSectionBase BadChunkType %d",aChunk.iChunkType));
sl@0: 		return KErrAccessDenied;
sl@0: 		}
sl@0: 
sl@0: 	TLinAddr lastBase=base;
sl@0: 	SChunkInfo *pS=iChunks;
sl@0: 	SChunkInfo *pE=pS+iNumChunks;
sl@0: 	while (pS<pE)
sl@0: 		{
sl@0: 		TLinAddr thisBase=pS->iDataSectionBase;
sl@0: 		__KTRACE_OPT(KPROC,Kern::Printf("Chunk already at %x",thisBase));
sl@0: 		if (thisBase>=maxBase)
sl@0: 			break;
sl@0: 		if (thisBase>=base) // Within the range we are allocating
sl@0: 			{
sl@0: 			TInt gap=thisBase-lastBase;
sl@0: 			if (gap>=aChunk.MaxSize())
sl@0: 				break;
sl@0: 			lastBase=thisBase+pS->iChunk->MaxSize();
sl@0: 			}
sl@0: 		pS++;
sl@0: 		}
sl@0: 	if (lastBase+aChunk.MaxSize()>maxBase)
sl@0: 		{
sl@0: 		__KTRACE_OPT(KPROC,Kern::Printf("ERROR - none allocated, out of memory"));
sl@0: 		return KErrNoMemory;
sl@0: 		}
sl@0: 	aBase=lastBase;
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("User allocated %x",aBase));
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TUint8* DMemModelProcess::DataSectionBase(DMemModelChunk* aChunk)
sl@0: 	{
sl@0: 	// this can't be called after $LOCK is deleted
sl@0: 	Kern::MutexWait(*iProcessLock);
sl@0: 	TInt pos=0;
sl@0: 	TInt r=ChunkIndex(aChunk,pos);
sl@0: 	if (r==0) // Found the chunk
sl@0: 		{
sl@0: 		TUint8* answer=((TUint8*)iChunks[pos].iDataSectionBase);
sl@0: 		__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::DataSectionBase %x",answer));
sl@0: 		Kern::MutexSignal(*iProcessLock);
sl@0: 		return answer;
sl@0: 		}
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::DataSectionBase chunk %08x not present in %08x",aChunk,this));
sl@0: 	Kern::MutexSignal(*iProcessLock);
sl@0: 	return(NULL);
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::DoRemoveChunk(TInt aIndex)
sl@0: 	{
sl@0: 	// Must be called with process $LOCK mutex held
sl@0: 	__DEBUG_EVENT(EEventUpdateProcess, this);
sl@0: 	DMemModelChunk* chunk = iChunks[aIndex].iChunk;
sl@0: 	Mmu& m = Mmu::Get();
sl@0: 	NKern::LockSystem();
sl@0: 	TInt attribs=chunk->iAttributes;
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("Removing Chunk attribs=%08x, Process attribs=%08x",attribs,iAttributes));
sl@0: 	if (!(attribs&DMemModelChunk::EFixedAccess))
sl@0: 		{
sl@0: 		// Must leave chunk in process chunk list until we have flushed the cache if necessary
sl@0: 		if (this==TheCurrentVMProcess && (attribs&DMemModelChunk::EFixedAddress))
sl@0: 			{
sl@0: 			TUint32 ff=chunk->ApplyTopLevelPermissions(DMemModelChunk::ENotRunning);
sl@0: 			m.GenericFlush(ff);
sl@0: 			// the system must now remain locked until the chunk is removed from the process chunk list
sl@0: 			}
sl@0: 		if (this==TheCurrentDataSectionProcess && !(attribs&DMemModelChunk::EFixedAddress))
sl@0: 			{
sl@0: 			// must do cache flush first
sl@0: 			FlushBeforeChunkMove(chunk);	// preemptible, but on return cache is free of chunk data
sl@0: 			chunk->MoveToHomeSection();
sl@0: 			// the system must now remain locked until the chunk is removed from the process chunk list
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	// Remove the chunk from the process chunk list
sl@0: 	SChunkInfo *pD=iChunks+aIndex;
sl@0: 	SChunkInfo *pS=iChunks+aIndex+1;
sl@0: 	SChunkInfo *pE=iChunks+iNumChunks;
sl@0: 	while(pS<pE)
sl@0: 		*pD++=*pS++;
sl@0: 	iNumChunks--;
sl@0: 
sl@0: 	// Update the process attribute flags
sl@0: 	if (!(attribs&DMemModelChunk::EFixedAddress))
sl@0: 		{
sl@0: 		if (--iNumMovingChunks==0)
sl@0: 			iAttributes &= ~EMoving;
sl@0: 		}
sl@0: 	if (!(attribs&DMemModelChunk::EFixedAccess))
sl@0: 		{
sl@0: 		if ((attribs&DMemModelChunk::ECode) && --iNumNonFixedAccessCodeChunks==0)
sl@0: 				iAttributes &= ~EVariableCode;
sl@0: 		if (this==TheCurrentDataSectionProcess && !(iAttributes&EMoving))
sl@0: 			{
sl@0: 			TheCurrentDataSectionProcess=NULL;
sl@0: 			TheCompleteDataSectionProcess=NULL;
sl@0: 			}
sl@0: 		if (--iNumNonFixedAccessChunks==0)
sl@0: 			{
sl@0: 			iAttributes &= ~EVariableAccess;
sl@0: 			if (this==TheCurrentVMProcess)
sl@0: 				{
sl@0: 				TheCurrentVMProcess=NULL;
sl@0: 				TheCurrentAddressSpace=NULL;
sl@0: 				}
sl@0: 			NKern::UnlockSystem();
sl@0: 			DoAttributeChange();	// change process from variable to fixed access
sl@0: 			}
sl@0: 		else
sl@0: 			NKern::UnlockSystem();
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		NKern::UnlockSystem();
sl@0: 		RemoveFixedAccessChunk(chunk);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Final chance for process to release resources during its death.
sl@0: 
sl@0: Called with process $LOCK mutex held (if it exists).
sl@0: This mutex will not be released before it is deleted.
sl@0: I.e. no other thread will ever hold the mutex again.
sl@0: */
sl@0: void DMemModelProcess::FinalRelease()
sl@0: 	{
sl@0: 	// Clean up any left over chunks (such as SharedIo buffers)
sl@0: 	while(iNumChunks)
sl@0: 		DoRemoveChunk(0);
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::RemoveChunk(DMemModelChunk *aChunk)
sl@0: 	{
sl@0: 	// note that this can't be called after the process $LOCK mutex has been deleted
sl@0: 	// since it can only be called by a thread in this process doing a handle close or
sl@0: 	// dying, or by the process handles array being deleted due to the process dying,
sl@0: 	// all of which happen before $LOCK is deleted.
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::RemoveChunk %08x from %08x",aChunk,this));
sl@0: 	Kern::MutexWait(*iProcessLock);
sl@0: 	TInt pos=0;
sl@0: 	TInt r=ChunkIndex(aChunk,pos);
sl@0: 	__KTRACE_OPT(KPROC,if(r) Kern::Printf("Chunk lookup failed with %d",r));
sl@0: 	if (r==0) // Found the chunk
sl@0: 		{
sl@0: 		__KTRACE_OPT(KPROC,Kern::Printf("Chunk access count %d",iChunks[pos].iAccessCount));
sl@0: 		if (--iChunks[pos].iAccessCount==0)
sl@0: 			DoRemoveChunk(pos);
sl@0: 		}
sl@0: 	Kern::MutexSignal(*iProcessLock);
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::ChunkIndex(DMemModelChunk* aChunk,TInt& aPos)
sl@0: 	{
sl@0: 	if (aChunk==NULL)
sl@0: 		return(KErrNotFound);
sl@0: 	TInt i=0;
sl@0: 	SChunkInfo *pC=iChunks;
sl@0: 	SChunkInfo *pE=pC+iNumChunks;
sl@0: 	while(pC<pE && (pC->iChunk!=aChunk))
sl@0: 		{
sl@0: 		pC++;
sl@0: 		i++;
sl@0: 		}
sl@0: 	if (pC==pE)
sl@0: 		return KErrNotFound;
sl@0: 	aPos=i;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::RemoveDllData()
sl@0: //
sl@0: // Call with CodeSegLock held
sl@0: //
sl@0: 	{
sl@0: 	Kern::SafeClose((DObject*&)iDllDataChunk, this);
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::CreateDllDataChunk()
sl@0: //
sl@0: // Call with CodeSegLock held
sl@0: //
sl@0: 	{
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("DMemModelProcess %O CreateDllDataChunk",this));
sl@0: 	Mmu& m = Mmu::Get();
sl@0: 	SChunkCreateInfo c;
sl@0: 	c.iGlobal=EFalse;
sl@0: 	c.iAtt=TChunkCreate::EDisconnected;
sl@0: 	c.iForceFixed=EFalse;
sl@0: 	c.iOperations=SChunkCreateInfo::EAdjust|SChunkCreateInfo::EAdd;
sl@0: 	c.iRunAddress=0;
sl@0: 	c.iPreallocated=0;
sl@0: 	c.iType=EDllData;
sl@0: 	c.iMaxSize=(iAttributes&EFixedAddress) ? 1 : m.iMaxDllDataSize;	// minimal size for fixed processes
sl@0: 	c.iName.Set(KLitDllDollarData);
sl@0: 	c.iOwner=this;
sl@0: 	c.iInitialBottom=0;
sl@0: 	c.iInitialTop=0;
sl@0: 	TLinAddr runAddr;
sl@0: 	return NewChunk((DChunk*&)iDllDataChunk,c,runAddr);
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::FreeDllDataChunk()
sl@0: 	{
sl@0: 	iDllDataChunk->Close(this);
sl@0: 	iDllDataChunk=NULL;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::CommitDllData(TLinAddr aBase, TInt aSize)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("DMemModelProcess %O CommitDllData %08x+%x",this,aBase,aSize));
sl@0: 	TInt r=KErrNone;
sl@0: 	if (!iDllDataChunk)
sl@0: 		r=CreateDllDataChunk();
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		Mmu& m = Mmu::Get();
sl@0: 		TLinAddr dll_data_base=(iAttributes & EFixedAddress) ? (TLinAddr)iDllDataChunk->Base()
sl@0: 														: TLinAddr(m.iDllDataBase);
sl@0: 		TInt offset=aBase-dll_data_base;
sl@0: 		__ASSERT_ALWAYS(TUint32(offset)<TUint32(iDllDataChunk->iMaxSize),MM::Panic(MM::ECommitInvalidDllDataAddress));
sl@0: 		r=iDllDataChunk->Commit(offset, aSize);
sl@0: 		if (r!=KErrNone && iDllDataChunk->iSize==0)
sl@0: 			FreeDllDataChunk();
sl@0: 		}
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("CommitDllData returns %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::DecommitDllData(TLinAddr aBase, TInt aSize)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("DMemModelProcess %O DecommitDllData %08x+%x",this,aBase,aSize));
sl@0: 	Mmu& m = Mmu::Get();
sl@0: 	TLinAddr dll_data_base=(iAttributes & EFixedAddress) ? (TLinAddr)iDllDataChunk->Base()
sl@0: 													: TLinAddr(m.iDllDataBase);
sl@0: 	TInt offset=aBase-dll_data_base;
sl@0: 	TInt r=iDllDataChunk->Decommit(offset, aSize);
sl@0: 	__ASSERT_ALWAYS(r==KErrNone,MM::Panic(MM::EDecommitInvalidDllDataAddress));
sl@0: 	if (iDllDataChunk->iSize==0)
sl@0: 		FreeDllDataChunk();
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::MapCodeSeg(DCodeSeg* aSeg)
sl@0: 	{
sl@0: 	DMemModelCodeSeg& seg=*(DMemModelCodeSeg*)aSeg;
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("Process %O MapCodeSeg %C", this, aSeg));
sl@0: 	TBool kernel_only=( (seg.iAttr&(ECodeSegAttKernel|ECodeSegAttGlobal)) == ECodeSegAttKernel );
sl@0: 	if (kernel_only && !(iAttributes&ESupervisor))
sl@0: 		return KErrNotSupported;
sl@0: 	if (seg.iAttr&ECodeSegAttKernel || seg.iDataAllocBase==-1)
sl@0: 		return KErrNone;	// no extra mappings needed for kernel code or code with fixed data address
sl@0: 	TInt r=KErrNone;
sl@0: 	if (seg.IsDll())
sl@0: 		{
sl@0: 		TInt total_data_size;
sl@0: 		TLinAddr data_base;
sl@0: 		seg.GetDataSizeAndBase(total_data_size, data_base);
sl@0: 		if (r==KErrNone && total_data_size)
sl@0: 			{
sl@0: 			TInt size=Mmu::RoundToPageSize(total_data_size);
sl@0: 			r=CommitDllData(data_base, size);
sl@0: 			}
sl@0: 		}
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::UnmapCodeSeg(DCodeSeg* aSeg)
sl@0: 	{
sl@0: 	DMemModelCodeSeg& seg=*(DMemModelCodeSeg*)aSeg;
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("Process %O UnmapCodeSeg %C", this, aSeg));
sl@0: 	if (seg.iAttr&ECodeSegAttKernel || seg.iDataAllocBase==-1)
sl@0: 		return;	// no extra mappings needed for kernel code or code with fixed data address
sl@0: 	if (seg.IsDll())
sl@0: 		{
sl@0: 		TInt total_data_size;
sl@0: 		TLinAddr data_base;
sl@0: 		seg.GetDataSizeAndBase(total_data_size, data_base);
sl@0: 		if (total_data_size)
sl@0: 			DecommitDllData(data_base, Mmu::RoundToPageSize(total_data_size));
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::NewShPool(DShPool*& /* aPool */, TShPoolCreateInfo& /* aInfo */)
sl@0: 	{
sl@0: 	return KErrNotSupported;
sl@0: 	}
sl@0: 
sl@0: TInt DThread::RawRead(const TAny* aSrc, TAny* aDest, TInt aLength, TInt aFlags, TIpcExcTrap* aExcTrap)
sl@0: //
sl@0: // Read from the thread's process.
sl@0: // aSrc is run address of memory to read. The memory is in aThread's address space.
sl@0: // aDest is the address of destination. The memory is in the current process's address space.
sl@0: // aExcTrap, exception trap object to be updated if the actual memory access is performed on another memory area. It happens 
sl@0: //           when  reading is performed in chunks or if home adress is read instead of the provided run address.
sl@0: // Enter and return with system locked.
sl@0: 	{
sl@0: 	const TUint8* pS=(const TUint8*)aSrc;
sl@0: 	TUint8* pD=(TUint8*)aDest;
sl@0: 	const TUint8* pC=NULL;
sl@0: 	TBool check=ETrue;
sl@0: 	TBool suspect=EFalse;
sl@0: 	DThread* pT=TheCurrentThread;
sl@0: 	while (aLength)
sl@0: 		{
sl@0: 		if (check)
sl@0: 			{
sl@0: 			suspect=((aFlags & KCheckLocalAddress) && !MM::CurrentAddress(pT,pD,aLength,ETrue));
sl@0: 			if (iMState==EDead)
sl@0: 				return KErrDied;
sl@0: 			pC=(const TUint8*)MM::CurrentAddress(this,pS,aLength,EFalse);
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawRead %08x<-[%08x::%08x]%08x+%x",pD,this,pS,pC,aLength));
sl@0: 			if (!pC)
sl@0: 				return KErrBadDescriptor;
sl@0: 			}
sl@0: 		TInt len=Min(aLength,K::MaxMemCopyInOneGo);
sl@0: 		if (aExcTrap)
sl@0: 			{
sl@0: 			aExcTrap->iSize = (len + 2*(sizeof(TInt32)-1));//+6 is for the worst case. We do not have to be precise here.
sl@0: 			aExcTrap->iRemoteBase = (TLinAddr)pC & ~(sizeof(TInt32)-1);		
sl@0: 			if (aExcTrap->iLocalBase)
sl@0: 				aExcTrap->iLocalBase = (TLinAddr)pD & ~(sizeof(TInt32)-1);
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawRead exc. update: %08x %08x %08x",aExcTrap->iLocalBase,aExcTrap->iRemoteBase,aExcTrap->iSize));
sl@0: 			}
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: 		XTRAP_PAGING_START(check);
sl@0: 		CHECK_PAGING_SAFE;
sl@0: #endif
sl@0: 
sl@0: 		suspect?(void)umemput(pD,pC,len):(void)memcpy(pD,pC,len);
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: 		XTRAP_PAGING_END;
sl@0: 		if(check<0)
sl@0: 			return check; // paging error caused by bad client (I.e. 'this' thread was bad)
sl@0: 		if(check)
sl@0: 			{
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawRead paging trap, suspect %d, dest %08x, source %08x, length %d\n", suspect, pD, pC, len));
sl@0: 			continue;
sl@0: 			}
sl@0: #endif
sl@0: 
sl@0: 		pD+=len;
sl@0: 		pS+=len;
sl@0: 		pC+=len;
sl@0: 		aLength-=len;
sl@0: 		if (aLength)
sl@0: 			check=NKern::FlashSystem();
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: TInt DThread::RawWrite(const TAny* aDest, const TAny* aSrc, TInt aLength, TInt aFlags, DThread* aOriginatingThread, TIpcExcTrap* aExcTrap)
sl@0: //
sl@0: // Write to the thread's process.
sl@0: // aDest is run address of memory to write. It resides in this thread's address space.
sl@0: // aSrc is address of the source buffer. It resides in the current process's address space.
sl@0: // aOriginatingThread is the thread on behalf of which this operation is performed (eg client of device driver).
sl@0: // Enter and return with system locked
sl@0: // aExcTrap, exception trap object to be updated if the actual memory access is performed on another memory area. It happens 
sl@0: //           when  reading is performed in chunks or if home adress is read instead of the provided run address.
sl@0: //
sl@0: 	{
sl@0: 	TUint8* pD=(TUint8*)aDest;
sl@0: 	const TUint8* pS=(const TUint8*)aSrc;
sl@0: 	TUint8* pC=NULL;
sl@0: 	TBool check=ETrue;
sl@0: 	TBool suspect=EFalse;
sl@0: 	DThread* pT=TheCurrentThread;
sl@0: 	DThread* pO=aOriginatingThread;
sl@0: 	if (!pO)
sl@0: 		pO=pT;
sl@0: 	DProcess* pF=K::TheFileServerProcess;
sl@0: 	TBool special=(iOwningProcess==pF && pO->iOwningProcess==pF);
sl@0: 	while (aLength)
sl@0: 		{
sl@0: 		if (check)
sl@0: 			{
sl@0: 			suspect=((aFlags & KCheckLocalAddress) && !MM::CurrentAddress(pT,pS,aLength,EFalse));
sl@0: 			if (iMState==EDead)
sl@0: 				return KErrDied;
sl@0: 			pC=(TUint8*)MM::CurrentAddress(this,pD,aLength,ETrue);
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawRead [%08x::%08x]%08x<-%08x+%x",this,pD,pC,pS,aLength));
sl@0: 			if (!pC)
sl@0: 				{
sl@0: 				if (special)
sl@0: 					pC=pD;
sl@0: 				else
sl@0: 					return KErrBadDescriptor;
sl@0: 				}
sl@0: 			}
sl@0: 		TInt len=Min(aLength,K::MaxMemCopyInOneGo);
sl@0: 		if (aExcTrap)
sl@0: 			{
sl@0: 			aExcTrap->iSize = (len + 2*(sizeof(TInt32)-1));//+6 is for the worst case. We do not have to be precise here.
sl@0: 			aExcTrap->iRemoteBase = (TLinAddr)pC & ~(sizeof(TInt32)-1);	
sl@0: 			if (aExcTrap->iLocalBase)
sl@0: 				aExcTrap->iLocalBase = (TLinAddr)pS & ~(sizeof(TInt32)-1);
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawWrite exc. update %08x %08x %08x",aExcTrap->iLocalBase,aExcTrap->iRemoteBase,aExcTrap->iSize));
sl@0: 			}
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: 		XTRAP_PAGING_START(check);
sl@0: 		// Must check that it is safe to page, unless we are reading from unpaged ROM in which case
sl@0: 		// we allow it.  umemget does this anyway, so we just need to check if suspect is not set.
sl@0: 		if (!suspect)
sl@0: 			{
sl@0: 			CHECK_PAGING_SAFE_RANGE((TLinAddr)aSrc, aLength);
sl@0: 			CHECK_DATA_PAGING_SAFE_RANGE((TLinAddr)aDest, aLength);
sl@0: 			}
sl@0: #endif
sl@0: 
sl@0: 		suspect?(void)umemget(pC,pS,len):(void)memcpy(pC,pS,len);
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: 		XTRAP_PAGING_END
sl@0: 		if(check<0)
sl@0: 			return check; // paging error caused by bad client (I.e. 'this' thread was bad)
sl@0: 		if(check)
sl@0: 			{
sl@0: 			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawWrite paging trap, suspect %d, dest %08x, src %08x, length %d\n", suspect, pC, pD, len));
sl@0: 			continue;
sl@0: 			}
sl@0: #endif
sl@0: 
sl@0: 		pD+=len;
sl@0: 		pS+=len;
sl@0: 		pC+=len;
sl@0: 		aLength-=len;
sl@0: 		if (aLength)
sl@0: 			check=NKern::FlashSystem();
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: #ifdef __DEBUGGER_SUPPORT__
sl@0: 
sl@0: TInt CodeModifier::SafeWriteCode(DProcess* aProcess, TLinAddr aAddress, TInt aSize, TUint aValue, void* aOldValue)
sl@0: 	{
sl@0: 	//Set exception handler. Make sure the boundaries cover the worst case (aSize = 4)
sl@0: 	TIpcExcTrap xt;
sl@0: 	xt.iLocalBase=0;
sl@0: 	xt.iRemoteBase=(TLinAddr)aAddress&~3; //word aligned.
sl@0: 	xt.iSize=sizeof(TInt);
sl@0: 	xt.iDir=1;
sl@0: 	NKern::LockSystem();
sl@0: 	TInt r=xt.Trap(NULL);
sl@0: 	if (r==0)
sl@0: 		{
sl@0: 		r = WriteCode(aAddress, aSize, aValue, aOldValue);
sl@0: 		xt.UnTrap();
sl@0: 		}
sl@0: 	NKern::UnlockSystem();
sl@0: 	return r;	
sl@0: 	}
sl@0: 
sl@0: TInt CodeModifier::WriteCode(TLinAddr aAddress, TInt aSize, TUint aValue, void* aOldValue)
sl@0: 	{
sl@0: 	TUint userChunkBase = (TUint)MM::UserCodeChunk->Base();
sl@0: 	TRomHeader romHeader = Epoc::RomHeader();
sl@0: 
sl@0: 	if (!((aAddress >= romHeader.iRomBase ) && (aAddress < (romHeader.iRomBase + romHeader.iUncompressedSize))))  //if not in ROM
sl@0: 		if ( (aAddress<userChunkBase) || (aAddress) > (userChunkBase+MM::UserCodeChunk->MaxSize()) ) //and not in non-XIP code
sl@0: 			return KErrBadDescriptor;
sl@0: 
sl@0: 	// if page was moved by defrag there may be a cache line with the
sl@0: 	// wrong, old physical address, so we must invalidate this first.
sl@0: 	InternalCache::Invalidate(KCacheSelectD, (TLinAddr)aAddress, 4);
sl@0: 
sl@0: 	//Copy data and clean/invalidate caches with interrupts disabled.
sl@0: 	TInt irq=NKern::DisableAllInterrupts();
sl@0: 	switch(aSize)
sl@0: 		{
sl@0: 		case 1:
sl@0: 			*(TUint8*) aOldValue = *(TUint8*)aAddress;
sl@0: 			*(TUint8*) aAddress  = (TUint8)aValue;
sl@0: 			 break;
sl@0: 		case 2:
sl@0: 			*(TUint16*) aOldValue = *(TUint16*)aAddress;
sl@0: 			*(TUint16*) aAddress  = (TUint16)aValue;
sl@0: 			 break;
sl@0: 		default://It is 4 otherwise
sl@0: 			*(TUint32*) aOldValue = *(TUint32*)aAddress;
sl@0: 			*(TUint32*) aAddress  = (TUint32)aValue;
sl@0: 			 break;
sl@0: 		};
sl@0: 	CacheMaintenance::CodeChanged(aAddress, aSize, CacheMaintenance::ECodeModifier);
sl@0: 	NKern::RestoreInterrupts(irq);
sl@0: 
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: #endif //__DEBUGGER_SUPPORT__
sl@0: 
sl@0: TInt DThread::ReadAndParseDesHeader(const TAny* aSrc, TDesHeader& aDest)
sl@0: //
sl@0: // Read the header of a remote descriptor.
sl@0: // Enter and return with system locked
sl@0: //
sl@0: 	{
sl@0: 	TInt r=KErrBadDescriptor;
sl@0: 	DThread* thread = TheCurrentThread;
sl@0: 	TRawDesHeader& header = (TRawDesHeader&)aDest;
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: retry:
sl@0: 	TInt pagingFault;
sl@0: 	XTRAP_PAGING_START(pagingFault);
sl@0: 	CHECK_PAGING_SAFE;
sl@0: 	thread->iIpcClient = this;
sl@0: #endif
sl@0: 
sl@0: 	const TUint32* pS=(const TUint32*)MM::CurrentAddress(this,aSrc,sizeof(TDesC8),EFalse);
sl@0: 	if (pS && KErrNone==Kern::SafeRead(pS,&header[0],sizeof(TUint32)))
sl@0: 		{
sl@0: 		TInt type=header[0]>>KShiftDesType8;
sl@0: 		static const TUint8 LengthLookup[16]={4,8,12,8,12,0,0,0,0,0,0,0,0,0,0,0};
sl@0: 		TInt len=LengthLookup[type];
sl@0: 		if(len>(TInt)sizeof(TUint32))
sl@0: 			{
sl@0: 			if(KErrNone==Kern::SafeRead(pS+1,&header[1],len-sizeof(TUint32)))
sl@0: 				r = type;
sl@0: 			// else, bad descriptor
sl@0: 			}
sl@0: 		else if(len)
sl@0: 			r = type;
sl@0: 		// else, bad descriptor
sl@0: 		}
sl@0: 
sl@0: #ifdef __DEMAND_PAGING__
sl@0: 	thread->iIpcClient = NULL;
sl@0: 	XTRAP_PAGING_END;
sl@0: 	if(pagingFault<0)
sl@0: 		return pagingFault; // paging error caused by bad client (I.e. 'this' thread was bad)
sl@0: 	if(pagingFault)
sl@0: 		goto retry;
sl@0: #endif
sl@0: 	
sl@0: 	return K::ParseDesHeader(aSrc, header, aDest);
sl@0: 	}
sl@0: 
sl@0: DMemModelChunk* ChunkFromAddress(DThread* aThread, const TAny* aAddress)
sl@0: 	{
sl@0: 	DMemModelProcess* pP = (DMemModelProcess*)aThread->iOwningProcess;
sl@0: 	DMemModelProcess::SChunkInfo* pS=pP->iChunks;
sl@0: 	DMemModelProcess::SChunkInfo* pC=pS+pP->iNumChunks;
sl@0: 	while(--pC>=pS && TUint(pC->iDataSectionBase)>TUint(aAddress)) {};
sl@0: 	if(pC<pS)
sl@0: 		return 0;
sl@0: 	return pC->iChunk;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: 	Open a shared chunk in which a remote address range is located.
sl@0: */
sl@0: DChunk* DThread::OpenSharedChunk(const TAny* aAddress, TBool aWrite, TInt& aOffset)
sl@0: 	{
sl@0: 	NKern::LockSystem();
sl@0: 	
sl@0: 	DMemModelProcess* pP = (DMemModelProcess*)iOwningProcess;
sl@0: 	DMemModelProcess::SChunkInfo* pS=pP->iChunks;
sl@0: 	DMemModelProcess::SChunkInfo* pC=pS+pP->iNumChunks;
sl@0: 	while(--pC>=pS && TUint(pC->iDataSectionBase)>TUint(aAddress)) {};
sl@0: 	if(pC>=pS)
sl@0: 		{
sl@0: 		DMemModelChunk* chunk = pC->iChunk;
sl@0: 		if(chunk->iChunkType==ESharedKernelSingle || chunk->iChunkType==ESharedKernelMultiple)
sl@0: 			{
sl@0: 			TInt offset = (TInt)aAddress-(TInt)chunk->Base();
sl@0: 			if(TUint(offset)<TUint(chunk->iMaxSize) && chunk->Open()==KErrNone)
sl@0: 				{
sl@0: 				aOffset = offset;
sl@0: 				NKern::UnlockSystem();
sl@0: 				return chunk;
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	NKern::UnlockSystem();
sl@0: 	return 0;
sl@0: 	}
sl@0: 	
sl@0: TInt DThread::PrepareMemoryForDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)
sl@0: 	{
sl@0: 	if ((iOwningProcess->iAttributes & DMemModelProcess::EFixedAddress )==0)
sl@0: 		return KErrNotSupported;
sl@0: 	Mmu& m=(Mmu&)*MmuBase::TheMmu;
sl@0: 	return m.PreparePagesForDMA((TLinAddr)aLinAddr, aSize, aPhysicalPageList);
sl@0: 	}
sl@0: 
sl@0: TInt DThread::ReleaseMemoryFromDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)
sl@0: 	{
sl@0: 	if ((iOwningProcess->iAttributes & DMemModelProcess::EFixedAddress )==0)
sl@0: 		return KErrNotSupported;
sl@0: 	TInt pageCount = (((TInt)aLinAddr & KPageMask) + aSize + KPageMask) >> KPageShift;
sl@0: 	Mmu& m=(Mmu&)*MmuBase::TheMmu;
sl@0: 	return m.ReleasePagesFromDMA(aPhysicalPageList, pageCount);
sl@0: 	}