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\mkernel.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "memmodel.h"
sl@0: 
sl@0: /********************************************
sl@0:  * Thread
sl@0:  ********************************************/
sl@0: 
sl@0: TInt DThread::AllocateSupervisorStack()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateSupervisorStack %O %x",this,iSupervisorStackSize));
sl@0: 	iSupervisorStackSize=Mmu::RoundToPageSize(iSupervisorStackSize);
sl@0: 	if (iThreadType!=EThreadInitial)
sl@0: 		{
sl@0: 		TInt offset=MM::SvStackChunk->Allocate(iSupervisorStackSize,PP::SupervisorThreadStackGuard);
sl@0: 		if (offset<0)
sl@0: 			{
sl@0: 			__KTRACE_FAIL(KErrNoMemory,Kern::Printf("ASS: %d",KErrNoMemory));
sl@0: 			return KErrNoMemory;
sl@0: 			}
sl@0: 		iSupervisorStack=MM::SvStackChunk->Base()+offset+PP::SupervisorThreadStackGuard;
sl@0: 		iSupervisorStackAllocated = TRUE;
sl@0: 		__KTRACE_OPT(KTHREAD,Kern::Printf("Supervisor stack at %x, size %x",iSupervisorStack,iSupervisorStackSize));
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: void DThread::FreeSupervisorStack()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeSupervisorStack %O",this));
sl@0: 	if (iSupervisorStackAllocated)
sl@0: 		{
sl@0: 		TAny* pStack = __e32_atomic_swp_ord_ptr(&iSupervisorStack, 0);
sl@0: 		if (pStack && iThreadType!=EThreadInitial)
sl@0: 			{
sl@0: 			__KTRACE_OPT(KTHREAD,Kern::Printf("Freeing supervisor stack at %08x, size %x",pStack,iSupervisorStackSize));
sl@0: 			TInt offset=(TUint8*)pStack-MM::SvStackChunk->Base();
sl@0: 			MM::SvStackChunk->Decommit(offset-PP::SupervisorThreadStackGuard,iSupervisorStackSize+PP::SupervisorThreadStackGuard);
sl@0: 			}
sl@0: 		}
sl@0: 	iSupervisorStackAllocated = FALSE;
sl@0: 	}
sl@0: 
sl@0: TInt DThread::AllocateUserStack(TInt aSize, TBool /*aPaged*/)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateUserStack %O %x",this,aSize));
sl@0: 
sl@0: 	aSize=Mmu::RoundToPageSize(aSize);
sl@0: 	if (aSize>PP::MaxUserThreadStack)
sl@0: 		return KErrTooBig;
sl@0: 	TInt guard=PP::UserThreadStackGuard;
sl@0: 	DProcess* pP=iOwningProcess;
sl@0: 	NKern::LockSystem();
sl@0: 	DChunk* pC=pP->iDataBssStackChunk;
sl@0: 	if (!pC || pC->Open()!=KErrNone)	// so chunk doesn't disappear during Allocate()
sl@0: 		{
sl@0: 		NKern::UnlockSystem();
sl@0: 		__KTRACE_FAIL(KErrDied,Kern::Printf("AUS1: %d",KErrDied));
sl@0: 		return KErrDied;
sl@0: 		}
sl@0: 	NKern::UnlockSystem();
sl@0: 	TInt r=pC->Allocate(aSize,guard);
sl@0: 	TInt s=pC->Close(NULL);				// NULL since we didn't add chunk to process again
sl@0: 	if (s & EObjectDeleted)
sl@0: 		{
sl@0: 		__KTRACE_FAIL(KErrDied,Kern::Printf("AUS2: %d",KErrDied));
sl@0: 		return KErrDied;
sl@0: 		}
sl@0: 	if (r<0)
sl@0: 		{
sl@0: 		__KTRACE_FAIL(r,Kern::Printf("AUS3: %d",r));
sl@0: 		return r;
sl@0: 		}
sl@0: 	iUserStackSize=aSize;
sl@0: 	iUserStackRunAddress=pP->iDataBssRunAddress+r+guard;
sl@0: 	__KTRACE_OPT(KTHREAD,Kern::Printf("User stack run address at %x",iUserStackRunAddress));
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: void DThread::FreeUserStack()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeUserStack %O",this));
sl@0: 	TLinAddr usr_stack = (TLinAddr)__e32_atomic_swp_ord_ptr(&iUserStackRunAddress, 0);
sl@0: 	if (usr_stack)
sl@0: 		{
sl@0: 		__KTRACE_OPT(KTHREAD,Kern::Printf("Freeing user stack at %x",usr_stack));
sl@0: 		DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess;
sl@0: 		NKern::LockSystem();
sl@0: 		DMemModelChunk* pC=(DMemModelChunk*)pP->iDataBssStackChunk;
sl@0: 		if (!pC || pC->Open()!=KErrNone)	// so chunk doesn't disappear during Decommit()
sl@0: 			{
sl@0: 			NKern::UnlockSystem();
sl@0: 			__KTRACE_FAIL(KErrDied,Kern::Printf("FUS"));
sl@0: 			return;
sl@0: 			}
sl@0: 		NKern::UnlockSystem();
sl@0: 		TInt offset=usr_stack-pP->iDataBssRunAddress;
sl@0: 		pC->Decommit(offset-PP::UserThreadStackGuard,iUserStackSize+PP::UserThreadStackGuard);
sl@0: 		pC->Close(NULL);			// NULL since we didn't add chunk to process again
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext)
sl@0: 	{
sl@0: 	aThread->iIpcClient = 0;
sl@0: 	TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap;
sl@0: 	switch (xt.ExcLocation(aThread, aContext))
sl@0: 		{
sl@0: 		case TIpcExcTrap::EExcRemote:
sl@0: 			// problem accessing remote address - 'leave' so an error code will be returned
sl@0: 			xt.Exception(KErrBadDescriptor);  // does not return
sl@0: 
sl@0: 		case TIpcExcTrap::EExcLocal:
sl@0: 			// problem accessing local address - return and panic current thread as usual
sl@0: 			NKern::UnlockSystem();
sl@0: 			return;
sl@0: 
sl@0: 		default:
sl@0: 			// otherwise return and fault kernel
sl@0: 			return;
sl@0: 		}
sl@0: 	}