--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/memmodel/epoc/multiple/mkernel.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,157 @@
+// Copyright (c) 1994-2009 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:
+// e32\memmodel\epoc\multiple\mkernel.cpp
+// 
+//
+
+#include "memmodel.h"
+
+/********************************************
+ * Thread
+ ********************************************/
+
+TInt DThread::AllocateSupervisorStack()
+	{
+	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateSupervisorStack %O %x",this,iSupervisorStackSize));
+	iSupervisorStackSize=Mmu::RoundToPageSize(iSupervisorStackSize);
+	if (iThreadType!=EThreadInitial)
+		{
+		TInt offset=MM::SvStackChunk->Allocate(iSupervisorStackSize,PP::SupervisorThreadStackGuard);
+		if (offset<0)
+			{
+			__KTRACE_FAIL(KErrNoMemory,Kern::Printf("ASS: %d",KErrNoMemory));
+			return KErrNoMemory;
+			}
+		iSupervisorStack=MM::SvStackChunk->Base()+offset+PP::SupervisorThreadStackGuard;
+		iSupervisorStackAllocated = TRUE;
+		__KTRACE_OPT(KTHREAD,Kern::Printf("Supervisor stack at %x, size %x",iSupervisorStack,iSupervisorStackSize));
+		}
+	return KErrNone;
+	}
+
+void DMemModelThread::DoExit1()
+	{
+	// Regularize the thread state before main exit processing.
+	// We must remove any existing alias before we do any operation 
+	// which requires aliasing (e.g. logon completion).
+	__KTRACE_OPT(KTHREAD,Kern::Printf("DMemModelThread %O DoExit1",this));
+	NKern::LockSystem();
+	RemoveAlias();
+	NKern::UnlockSystem();
+	}
+
+void DThread::FreeSupervisorStack()
+	{
+	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeSupervisorStack %O",this));
+	if (iSupervisorStackAllocated)
+		{
+		TAny* pStack = __e32_atomic_swp_ord_ptr(&iSupervisorStack, 0);
+		if (pStack && iThreadType!=EThreadInitial)
+			{
+			__KTRACE_OPT(KTHREAD,Kern::Printf("Freeing supervisor stack at %08x, size %x",pStack,iSupervisorStackSize));
+			TInt offset=(TUint8*)pStack-MM::SvStackChunk->Base();
+			TInt r=MM::SvStackChunk->Decommit(offset-PP::SupervisorThreadStackGuard,iSupervisorStackSize+PP::SupervisorThreadStackGuard);
+			__ASSERT_DEBUG(r==KErrNone, MM::Panic(MM::EDecommitFailed));
+			(void)r; //Supress the warning in urel build
+			}
+		}
+	iSupervisorStackAllocated = FALSE;
+	}
+
+TInt DThread::AllocateUserStack(TInt aSize, TBool /*aPaged*/)
+	{
+	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateUserStack %O %x",this,aSize));
+
+	aSize=Mmu::RoundToPageSize(aSize);
+	if (aSize>PP::MaxUserThreadStack)
+		return KErrTooBig;
+	TInt guard=PP::UserThreadStackGuard;
+	DProcess* pP=iOwningProcess;
+	NKern::LockSystem();
+	DChunk* pC=pP->iDataBssStackChunk;
+	if (!pC || pC->Open()!=KErrNone)	// so chunk doesn't disappear during Allocate()
+		{
+		NKern::UnlockSystem();
+		__KTRACE_FAIL(KErrDied,Kern::Printf("AUS1: %d",KErrDied));
+		return KErrDied;
+		}
+	NKern::UnlockSystem();
+	TInt r=pC->Allocate(aSize,guard);
+	TInt s=pC->Close(NULL);				// NULL since we didn't add chunk to process again
+	if (s & EObjectDeleted)
+		{
+		__KTRACE_FAIL(KErrDied,Kern::Printf("AUS2: %d",KErrDied));
+		return KErrDied;
+		}
+	if (r<0)
+		{
+		__KTRACE_FAIL(r,Kern::Printf("AUS3: %d",r));
+		return r;
+		}
+	iUserStackSize=aSize;
+	iUserStackRunAddress=pP->iDataBssRunAddress+r+guard;
+	__KTRACE_OPT(KTHREAD,Kern::Printf("User stack run address at %x",iUserStackRunAddress));
+	return KErrNone;
+	}
+
+void DThread::FreeUserStack()
+	{
+	__KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeUserStack %O",this));
+	TLinAddr usr_stack = (TLinAddr)__e32_atomic_swp_ord_ptr(&iUserStackRunAddress, 0);
+	if (usr_stack)
+		{
+		__KTRACE_OPT(KTHREAD,Kern::Printf("Freeing user stack at %x",usr_stack));
+		DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess;
+		NKern::LockSystem();
+		DMemModelChunk* pC=(DMemModelChunk*)pP->iDataBssStackChunk;
+		if (!pC || pC->Open()!=KErrNone)	// so chunk doesn't disappear during Decommit()
+			{
+			NKern::UnlockSystem();
+			__KTRACE_FAIL(KErrDied,Kern::Printf("FUS"));
+			return;
+			}
+		NKern::UnlockSystem();
+		TInt offset=usr_stack-pP->iDataBssRunAddress;
+		TInt r=pC->Decommit(offset-PP::UserThreadStackGuard,iUserStackSize+PP::UserThreadStackGuard);
+		__ASSERT_DEBUG(r==KErrNone, MM::Panic(MM::EDecommitFailed));
+		pC->Close(NULL);			// NULL since we didn't add chunk to process again
+		(void)r; //Supress the warning in urel build
+		}
+	}
+
+void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext)
+	{
+	aThread->iIpcClient = 0;
+	TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap;
+	switch (xt.ExcLocation(aThread, aContext))
+		{
+		case TIpcExcTrap::EExcRemote:
+			// problem accessing remote address - 'leave' so an error code will be returned
+			NKern::LockSystem();
+			((DMemModelThread*)aThread)->RemoveAlias();
+			xt.Exception(KErrBadDescriptor);  // does not return
+
+		case TIpcExcTrap::EExcLocal:
+			// problem accessing local address - return and panic current thread as usual
+			NKern::LockSystem();
+			((DMemModelThread*)aThread)->RemoveAlias();
+			NKern::UnlockSystem();
+			return;
+
+		default:
+			// otherwise return and fault kernel
+			NKern::LockSystem();
+			return;
+		}
+	}