// Copyright (c) 2005-2009 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:

// e32test\debug\d_codemodifier.cpp

// See e32test\debug\t_codemodifier.cpp for details

// 

//

#include "d_codemodifier.h"

#include <kernel/kern_priv.h>

#include <kernel/cache.h>

class DCodeModifier : public DLogicalChannelBase

	{

public:

	DCodeModifier();

	~DCodeModifier();

	static TBool Handler (const TDesC8& aText, TTraceSource aTraceSource);

protected:

	virtual TInt DoCreate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);

	virtual TInt Request(TInt aFunction, TAny* a1, TAny* a2);

private:

	DThread* iThread[2];

	};

DCodeModifier* CodeModifierDriver;

DCodeModifier::DCodeModifier() 

	{

	}

DCodeModifier::~DCodeModifier()

	{

	CodeModifierDriver = NULL;

	}

/**Creates the channel*/

TInt DCodeModifier::DoCreate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& /*aVer*/)

	{

	return KErrNone;

	}

/**User side request entry point.*/

TInt DCodeModifier::Request(TInt aFunction, TAny* a1, TAny* a2)

	{

	TInt r = KErrNone;

	RCodeModifierDevice::TData data;

	kumemget(&data,a1,sizeof(data));

	switch (aFunction)

	{

		case RCodeModifierDevice::EControlThreadId:

			{

			DObjectCon* threads=Kern::Containers()[EThread];

			NKern::ThreadEnterCS();

			threads->Wait();

			iThread[data.iServer]=Kern::ThreadFromId(data.iThreadId);

			if(!iThread[data.iServer])

				r=KErrNotFound;

			threads->Signal();

			NKern::ThreadLeaveCS();

			}

			break;

		case RCodeModifierDevice::EControlReadWord:

			{	

			TInt val;

			r = Kern::ThreadRawRead(iThread[data.iServer], (const TAny*) data.iAddress, (TAny*) &val, sizeof(TInt));

			kumemput(a2,&val,sizeof(TInt));

			}

			break;

		case RCodeModifierDevice::EControlWriteWord:

			r = Kern::ThreadRawWrite(iThread[data.iServer], (TAny*)data.iAddress,(const TAny*) &a2, sizeof(TInt));

			break;

		case RCodeModifierDevice::EControlWriteCode:

			r = DebugSupport::ModifyCode(iThread[data.iServer], (TLinAddr) data.iAddress, data.iSize, (TUint)a2, DebugSupport::EBreakpointGlobal);

			if (r == DebugSupport::EBreakpointGlobal)

				r = KErrNone;	

			break;

		case RCodeModifierDevice::EControlRestoreCode:

			r = DebugSupport::RestoreCode(iThread[data.iServer], (TLinAddr)data.iAddress);	

			break;

		case RCodeModifierDevice::EInitialiseCodeModifier:

			{

			TUint cap;

			r = DebugSupport::InitialiseCodeModifier(cap,data.iSize);

			if (r && (cap!=DebugSupport::EBreakpointGlobal))

				r = KErrGeneral;

			}

			break;

		case RCodeModifierDevice::ECloseCodeModifier:

			DebugSupport::CloseCodeModifier();

			break;

		case RCodeModifierDevice::EControlAllocShadowPage:

			NKern::ThreadEnterCS();

			r = Epoc::AllocShadowPage(data.iAddress & ~(Kern::RoundToPageSize(1)-1));

			NKern::ThreadLeaveCS();

			break;

		case RCodeModifierDevice::EControlFreeShadowPage:

			NKern::ThreadEnterCS();

			r = Epoc::FreeShadowPage(data.iAddress & ~(Kern::RoundToPageSize(1)-1));

			NKern::ThreadLeaveCS();

			break;

		default:

			r=KErrNotSupported;

		}

	return r;

	}

//////////////////////////////////////////

class DTestFactory : public DLogicalDevice

	{

public:

	DTestFactory();

	// from DLogicalDevice

	virtual TInt Install();

	virtual void GetCaps(TDes8& aDes) const;

	virtual TInt Create(DLogicalChannelBase*& aChannel);

	};

DTestFactory::DTestFactory()

    {

    iParseMask = KDeviceAllowUnit;

    iUnitsMask = 0x3;

    }

TInt DTestFactory::Create(DLogicalChannelBase*& aChannel)

    {

	CodeModifierDriver = new DCodeModifier;

	aChannel = CodeModifierDriver;

	return (aChannel ? KErrNone : KErrNoMemory);

    }

TInt DTestFactory::Install()

    {

    return SetName(&KCodeModifierName);

    }

void DTestFactory::GetCaps(TDes8& /*aDes*/) const

    {

    }

DECLARE_STANDARD_LDD()

	{

    return new DTestFactory;

	}