// Copyright (c) 1995-2009 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\euser\epoc\win32\uc_exec.cpp

// 

//

//#define __GEN_USER_EXEC_CODE__

#include "../win32/uc_std.h"

#include <e32svr.h>

#include <emulator.h>

//

#include <stdlib.h>

#include <stdio.h>

/*

Symbian compatibility executive panics

*/

enum TSymcExecPanic

	{

	ESymcExecPanicHeapAlreadyExists,

	};

void Panic(TInt aReason)

	{

	_LIT(KCategory,"SYMC-Exec");

	User::Panic(KCategory,aReason);

	}

//

typedef TInt (__fastcall *TDispatcher)(TInt, TInt*);

TInt __fastcall LazyDispatch(TInt aFunction, TInt* aArgs);

#pragma data_seg(".data2")

#ifdef __VC32__

#pragma bss_seg(".data2")

#endif

static TDispatcher TheDispatcher = &LazyDispatch;

#pragma data_seg()

#ifdef __VC32__

#pragma bss_seg()

#endif

TInt __fastcall LazyDispatch(TInt aFunction, TInt* aArgs)

	{

	//SL:

	HINSTANCE kernel = GetModuleHandleA("ekern.dll");

	//HINSTANCE kernel = GetModuleHandleA("ekern.exe");

	if (kernel)

		{

		TDispatcher dispatcher = (TDispatcher)Emulator::GetProcAddress(kernel, (LPCSTR)1);

		if (dispatcher)

			{

			TheDispatcher = dispatcher;

			return dispatcher(aFunction, aArgs);

			}

		}

	ExitProcess(101);

	return 0;

	}

#include <u32exec.h>

/******************************************************************************

 * Slow executive calls with preprocessing or extra arguments

 ******************************************************************************/

__NAKED__ TInt Exec::SessionSend(TInt /*aHandle*/, TInt /*aFunction*/, TAny* /*aPtr*/, TRequestStatus* /*aStatus*/)

//

// Send a blind message to the server.

//

	{

	__DISPATCH(EExecSessionSend|EXECUTIVE_SLOW)

	}

__NAKED__ TInt Exec::SessionSendSync(TInt /*aHandle*/, TInt /*aFunction*/, TAny* /*aPtr*/, TRequestStatus* /*aStatus*/)

//

// Send a blind message to the server using thread's dedicated message slot.

//

	{

	__DISPATCH(EExecSessionSendSync|EXECUTIVE_SLOW)

	}

__NAKED__ TInt Exec::MessageIpcCopy(TInt /*aHandle*/, TInt /*aParam*/, SIpcCopyInfo& /*aInfo*/, TInt /*anOffset*/)

//

// Perform a descriptor-to-descriptor IPC copy

//

	{

	__DISPATCH(EExecMessageIpcCopy|EXECUTIVE_SLOW)

	}

__NAKED__ TInt Exec::BTraceOut(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)

	{

	__DISPATCH(EExecBTraceOut|EXECUTIVE_SLOW)

	}

__NAKED__ TInt Exec::BTraceOutBig(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)

	{

	__DISPATCH(EExecBTraceOutBig|EXECUTIVE_SLOW)

	}

__NAKED__ TInt Exec::UTraceOut(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)

	{

	__DISPATCH(EExecUTraceOut|EXECUTIVE_SLOW)

	}

EXPORT_C TBool BTrace::Out(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	BTrace::SExecExtension ext;

	ext.iA2 = a2;

	ext.iA3 = a3;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,0);

	}

EXPORT_C TBool BTrace::OutX(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	BTrace::SExecExtension ext;

	ext.iA2 = a2;

	ext.iA3 = a3;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,0);

	}

EXPORT_C TBool BTrace::OutN(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	ext.iA2 = a2;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutNX(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	ext.iA2 = a2;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutBig(TUint32 a0, TUint32 a1, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	ext.iA2 = 0;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	if((TUint)aDataSize>8u)

		{

		if((TUint)aDataSize>KMaxBTraceDataArray+4u)

			return Exec::BTraceOutBig(a0,a1,ext,aDataSize);

		a0 += 4;

		aDataSize -= 4;

		ext.iA2 = *((TUint32*&)aData)++;

		ext.iA3 = (TUint32)aData;

		return Exec::BTraceOut(a0,a1,ext,aDataSize);

		}

	if((TUint)aDataSize>4u)

		ext.iA3 = ((TUint32*)aData)[1];

	if(aDataSize)

		ext.iA2 = ((TUint32*)aData)[0];

	a0 += aDataSize;

	aDataSize = 0;

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutFiltered(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	BTrace::SExecExtension ext;

	a0 |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = a2;

	ext.iA3 = a3;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,0);

	}

EXPORT_C TBool BTrace::OutFilteredX(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	BTrace::SExecExtension ext;

	a0 |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = a2;

	ext.iA3 = a3;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,0);

	}

EXPORT_C TBool BTrace::OutFilteredN(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	a0 |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = a2;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutFilteredNX(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	a0 |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = a2;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutFilteredBig(TUint32 a0, TUint32 a1, const TAny* aData, TInt aDataSize)

	{

	BTrace::SExecExtension ext;

	a0 |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = 0;

	ext.iA3 = (TUint32)aData;

	ext.iPc = (&a0)[-1]; // return address on X86

	if((TUint)aDataSize>8u)

		{

		if((TUint)aDataSize>KMaxBTraceDataArray+4u)

			return Exec::BTraceOutBig(a0,a1,ext,aDataSize);

		a0 += 4;

		aDataSize -= 4;

		ext.iA2 = *((TUint32*&)aData)++;

		ext.iA3 = (TUint32)aData;

		return Exec::BTraceOut(a0,a1,ext,aDataSize);

		}

	if((TUint)aDataSize>4u)

		ext.iA3 = ((TUint32*)aData)[1];

	if(aDataSize)

		ext.iA2 = ((TUint32*)aData)[0];

	a0 += aDataSize;

	aDataSize = 0;

	return Exec::BTraceOut(a0,a1,ext,aDataSize);

	}

EXPORT_C TBool BTrace::OutFilteredPcFormatBig(TUint32 aHeader, TUint32 aModuleUid, TUint32 aPc, TUint16 aFormatId, const TAny* aData, TInt aDataSize)

	{

 	BTrace::SExecExtension ext;

	aHeader |= EMissingRecord<<BTrace::EFlagsIndex*8; // overload meaning of this flag to indicate filtered trace

	ext.iA2 = aFormatId;

	ext.iA3 = (TUint32)aData;

	ext.iPc = aPc;

	if((TUint)aDataSize>KMaxBTraceDataArray)

		return Exec::UTraceOut(aHeader,aModuleUid,ext,aDataSize);

	aHeader += 4;

	return Exec::BTraceOut(aHeader,aModuleUid,ext,aDataSize);

	}

__NAKED__ void ExecRequestComplete(TInt /*aHandle*/, TRequestStatus*& /*aStatus*/, TInt /*aReason*/)

	{

	_asm mov ecx, [esp+8]			// ecx = TRequestStatus**

	_asm xor eax, eax				//

	_asm lock xchg eax, [ecx]		// eax=TRequestStatus*, zero TRequestStatus*

	_asm cmp eax, 0					//

	_asm je ExecRequestComplete_ret

	_asm mov ecx, [esp+12]			// ecx = aReason

	_asm mov [eax], ecx				// store aReason in request status

	__DISPATCH(EExecThreadRequestSignal|EXECUTIVE_SLOW)

	_asm ExecRequestComplete_ret: ret

	}

EXPORT_C void RThread::RequestComplete(TRequestStatus*& aStatus, TInt aReason) const

/**

Signals this thread that an asynchronous request originating from this thread,

is complete.

The request is associated with the specified request status object supplied

by this thread.

Typically, the caller of this function is the service provider responsible

for satisfying the request made by this thread.

The request is completed with the completion code passed in aReason. This

value is copied into this thread's request status, *aStatus, before signalling

this thread's request semaphore.

The meaning of the completion code is a matter of convention to be decided

between the service provider and this thread.

In a client-server situation, completion of a request takes place in the context

of the server thread, but the pointer is interpreted in the address space

of the client.

It is often the case in client-server situations that the client and the server

are in the same address space (i.e. the same process).

Setting the pointer to the request status to NULL is a convenience, not all

servers need it.

@param aStatus A reference to a pointer to the request status originally

               supplied by this thread. This is a pointer into this thread's

               address space, which may be different to the thread currently

               executing (this code). On return, the pointer to the request

               status is set to NULL.

@param aReason The completion code of this request.

*/

	{

	ExecRequestComplete(iHandle,aStatus,aReason);

	}

/**

Signal this threads request semaphore.

This is similar to RThread::RequestComplete() except that no TRequestStatus object

is modified.

May only be used to signal a thread in the same process as the callers.

@panic KERN-EXEC 46 if the thread is not in the same process as the callers

*/

EXPORT_C void RThread::RequestSignal() const

	{

	Exec::ThreadRequestSignal(iHandle);

	}

void ExitCurrentThread(TExitType aType, TInt aReason, const TDesC8* aCategory)

	{

	Exec::ThreadKill(KCurrentThreadHandle, aType, aReason, aCategory);

	}

//

#ifndef __GEN_USER_EXEC_CODE__

const TInt KTrapStackSize=256;

/*

*/

class TThread

	{

public:

public:

	RSemaphore iRequestSemaphore;

	CActiveScheduler* iActiveScheduler; //Current active scheduler for this thread. Used.

	TTrapHandler* iHandler; //This is our cleanup stack. Used.

	//No idea why we need that trap stack

	};

/*

Object used to store process globals for our pseudo kernel.

That's typically going to be a singleton.

*/

class TProcess

	{

public:

	void CreateHeap();

	void Free();

public:

	RHeap* iAllocator;

	TAny* iBase;

	TThread iThread; //Single thread for now

	};

void TProcess::CreateHeap()

	{

	//Define the size of our heap

	const TInt KHeapMaxSize=1024*1024*10; // 10 Mo for now

	__ASSERT_ALWAYS(iAllocator==NULL && iBase==NULL,Panic(ESymcExecPanicHeapAlreadyExists));	

	iBase=malloc(KHeapMaxSize);

	__ASSERT_ALWAYS(iBase!=NULL,Panic(ESymcExecPanicCreateHeapFailed));	

	//TODO: is there anyway we could use variable size heap?

	iAllocator=UserHeap::FixedHeap(iBase,KHeapMaxSize);

	__ASSERT_ALWAYS(iAllocator!=NULL,Panic(ESymcExecPanicCreateHeapFailed));	

	}

void TProcess::Free()

	{

	free(iBase);

	}

TProcess gProcess;

//RHeap gAllocator;

__EXECDECL__ void Exec::WaitForAnyRequest()

	{

	FAST_EXEC0(EFastExecWaitForAnyRequest);

	}

__EXECDECL__ RAllocator* Exec::Heap()

	{	

	//FAST_EXEC0(EFastExecHeap);

	return gProcess.iAllocator;

	}

__EXECDECL__ RAllocator* Exec::HeapSwitch(RAllocator*)

	{

	FAST_EXEC1(EFastExecHeapSwitch);

	}

__EXECDECL__ TTrapHandler* Exec::PushTrapFrame(TTrap* aTrap)

	{

	//FAST_EXEC1(EFastExecPushTrapFrame);

	}

__EXECDECL__ TTrap* Exec::PopTrapFrame()

	{

	//FAST_EXEC0(EFastExecPopTrapFrame);

	}

__EXECDECL__ CActiveScheduler* Exec::ActiveScheduler()

	{

	FAST_EXEC0(EFastExecActiveScheduler);

	}

__EXECDECL__ void Exec::SetActiveScheduler(CActiveScheduler*)

	{

	FAST_EXEC1(EFastExecSetActiveScheduler);

	}

__EXECDECL__ TTimerLockSpec Exec::LockPeriod()

	{

	FAST_EXEC0(EFastExecLockPeriod);

	}

__EXECDECL__ TTrapHandler* Exec::TrapHandler()

	{

	//FAST_EXEC0(EFastExecTrapHandler);

	return gProcess.iThread.iHandler;

	}

__EXECDECL__ TTrapHandler* Exec::SetTrapHandler(TTrapHandler* aHandler)

	{	

	//FAST_EXEC1(EFastExecSetTrapHandler);

	TTrapHandler* prev=gProcess.iThread.iHandler;

	gProcess.iThread.iHandler=aHandler;

	return prev;

	}

__EXECDECL__ TUint32 Exec::DebugMask()

	{

	FAST_EXEC0(EFastExecDebugMask);

	}

__EXECDECL__ TUint32 Exec::DebugMaskIndex(TUint)

	{

	FAST_EXEC1(EFastExecDebugMaskIndex);

	}

__EXECDECL__ void Exec::SetDebugMask(TUint32)

	{

	FAST_EXEC1(EFastExecSetDebugMask);

	}