sl@0: // Copyright (c) 2008-2009 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\kernel\arm\cscmdatasave.cpp
sl@0: // SCM - Arm portion
sl@0: // 
sl@0: //
sl@0: 
sl@0: #define __INCLUDE_REG_OFFSETS__  // for SP_R13U in nk_plat.h
sl@0: 
sl@0: 
sl@0: #include "arm_mem.h"
sl@0: #include "nk_plat.h"
sl@0: #include <scmdatatypes.h>
sl@0: #include <scmdatasave.h>
sl@0: 
sl@0: 
sl@0: /**
sl@0:  * Reads the CPU registers at the time of the crash
sl@0:  * @param aRegs struct to store the resulting CPU registers
sl@0:  */
sl@0: void SCMDataSave::ReadCPURegisters(SFullArmRegSet& aRegs)
sl@0: 	{
sl@0: 	aRegs =*(SFullArmRegSet*)iMonitor->iRegs;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0:  * Reads the user registers for a given thread - may not be the current thread
sl@0:  * @param aThread thread whose registers we want to read
sl@0:  * @param aRegs registers will be written here if available
sl@0:  * @return KErrArgument if aThread is the current thread or any of the system wide error codes
sl@0:  */
sl@0: TInt SCMDataSave::ReadUserRegisters(DThread* aThread, TArmRegSet& aRegs, TUint32& aAvailableRegs)
sl@0: 	{
sl@0: 	TFileName filename;
sl@0: 	aThread->TraceAppendFullName(filename, EFalse);	
sl@0: 	
sl@0: 	//we retrieve the registers differently for the current thread
sl@0: 	if(aThread == &Kern::CurrentThread())
sl@0: 		{
sl@0: 		return KErrArgument;
sl@0: 		}
sl@0: 	
sl@0: 	TUint32* stackPointer = (TUint32*)aThread->iNThread.iSavedSP; //Still need to check pointer somehow
sl@0: 	TUint32* stackTop = (TUint32*)((TUint32)aThread->iNThread.iStackBase +(TUint32)aThread->iNThread.iStackSize);
sl@0: 	TArmReg* out = (TArmReg*)(&aRegs);		
sl@0: 	
sl@0: 	//Get a pointer to this threads context table
sl@0: 	NThread::TUserContextType type = aThread->iNThread.UserContextType();
sl@0: 	const TArmContextElement* table = aThread->iNThread.UserContextTables()[type];
sl@0: 	
sl@0: 	aAvailableRegs = 0;
sl@0: 	for(TInt i = 0; i<KArmRegisterCount; ++i)
sl@0: 		{
sl@0: 		TInt value = table[i].iValue;
sl@0: 		TInt type = table[i].iType;
sl@0: 		
sl@0: 		if(type == TArmContextElement::EOffsetFromSp)
sl@0: 			{
sl@0: 			value = stackPointer[value];	
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		else if(type == TArmContextElement::EOffsetFromStackTop)
sl@0: 			{
sl@0: 			value = stackTop[-value];
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		else if(type == TArmContextElement::ESpPlusOffset)
sl@0: 			{
sl@0: 			value = (TInt)(stackPointer + value);
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		
sl@0: 		out[i] = value;
sl@0: 		}
sl@0: 	
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0:  * Reads the system registers for a given thread
sl@0:  * Can not be used on the current thread
sl@0:  * @param aThread
sl@0:  * @param aRegs
sl@0:  * @param aAvailableRegs
sl@0:  * @return KErrArgument if aThread is the current thread or any of the system wide error codes
sl@0:  */
sl@0: TInt SCMDataSave::ReadSystemRegisters(DThread* aThread, TArmRegSet& aRegs, TUint32& aAvailableRegs)
sl@0: 	{	
sl@0: 	if(aThread == &Kern::CurrentThread())
sl@0: 		{
sl@0: 		return KErrArgument;
sl@0: 		}
sl@0: 	
sl@0: 	TFileName filename;
sl@0: 	aThread->TraceAppendFullName(filename, EFalse);
sl@0: 	
sl@0: 	TUint32* stackPointer = (TUint32*)aThread->iNThread.iSavedSP;
sl@0: 	TUint32* stackTop = (TUint32*)((TUint32)aThread->iNThread.iStackBase +(TUint32)aThread->iNThread.iStackSize);
sl@0: 	TArmReg* out = (TArmReg*)(&aRegs);		
sl@0: 	
sl@0: 	//Get a pointer to this threads context table
sl@0: 	const TArmContextElement* table = aThread->iNThread.UserContextTables()[NThread::EContextKernel];
sl@0: 	
sl@0: 	aAvailableRegs = 0;
sl@0: 	for(TInt i = 0; i<KArmRegisterCount; ++i)
sl@0: 		{
sl@0: 		TInt value = table[i].iValue;
sl@0: 		TInt type = table[i].iType;
sl@0: 		
sl@0: 		if(type == TArmContextElement::EOffsetFromSp)
sl@0: 			{
sl@0: 			//ensure we are still on the stack
sl@0: 			if(stackPointer + value >= stackTop)
sl@0: 				continue;
sl@0: 				
sl@0: 			value = stackPointer[value];	
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		else if(type == TArmContextElement::EOffsetFromStackTop)
sl@0: 			{
sl@0: 			//ensure we are still on the stack
sl@0: 			if(stackTop - value < (TUint32*)aThread->iNThread.iStackBase)
sl@0: 				continue;
sl@0: 			
sl@0: 			value = stackTop[-value];
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		else if(type == TArmContextElement::ESpPlusOffset)
sl@0: 			{
sl@0: 			value = (TInt)(stackPointer + value);
sl@0: 			aAvailableRegs |= (1<<i);
sl@0: 			}
sl@0: 		
sl@0: 		out[i] = value;
sl@0: 		}	
sl@0: 	
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: //EOF
sl@0: