// 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\arm\uc_trp.cia

// 

//

#include <e32cia.h>

#include <u32std.h>

#include <e32panic.h>

#include <u32exec.h>

#include "uc_std.h"

//  With -fvtable-thunks

const TInt KVTableTrapOffset=8;

const TInt KVTableLeaveOffset=16;

//  Without -fvtable-thunks

//  const TInt KVTableTrapOffset=12;

//  const TInt KVTableLeaveOffset=28;

#ifndef __LEAVE_EQUALS_THROW__

EXPORT_C __NAKED__ TInt TTrap::Trap(TInt & /*aResult*/)

//

// Save the enter frame state and return 0.

//

	{

	asm("mov r2, #0 ");						// aResult==KErrNone

	asm("str r2, [r1, #0] ");				// iResult=(&aResult)

	asm("str r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));

	asm("stmia r0, {r4-r11, sp, lr} ");		// Save the context

	asm("stmfd sp!, {r4,lr} ");

	asm("bl  " CSM_ZN4Exec13PushTrapFrameEP5TTrap);

	asm("cmp r0, #0 ");						// == NULL

	asm("ldrne r3, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));

	asm("beq ttrap_trap_no_trap_handler ");

#ifdef __SUPPORT_THUMB_INTERWORKING

	asm("ldr r3, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));

	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()

	asm("bx r3 ");

#else

	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()

	asm("ldr pc, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));

#endif

	asm("__ttrap_trap_return: ");

	asm("mov r0, #0							");

	asm("ttrap_trap_no_trap_handler: ");

	__POPRET("r4,");

	}

extern void PanicNoTrapFrame();

EXPORT_C __NAKED__ void User::Leave(TInt /*aReason*/)

/**

Leaves the currently executing function, unwinds the call stack, and returns

from the most recently entered trap harness.

@param aReason The value returned from the most recent call to TRAP or TRAPD.

               This is known as the reason code and, typically, it gives the

               reason for the environment or user error causing this leave

               to occur.

@see TRAP

@see TRAPD              

*/

	{

	asm("mov r4, r0 ");						// Save aReason

	asm("bl  " CSM_ZN4Exec12PopTrapFrameEv);			// Returns the current TTrap

    asm("cmp r0, #0 ");

    asm("bleq  " CSM_Z16PanicNoTrapFramev);

	asm("ldr r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));

	asm("mov r5, r0 ");						// Save it for later

	asm("ldr r0, [r0, #%a0]" : : "i" _FOFF(TTrap,iHandler));

	asm("str r4, [r1, #0] ");				// *(pT->iResult)=aReason

	asm("cmp r0, #0 ");

	asm("ldrne r2, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));

	asm("beq user_leave_no_trap_handler ");	// No trap handler

	asm("mov r1, r4 ");						// Pass aReason

#ifdef __SUPPORT_THUMB_INTERWORKING

	asm("ldr r3, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));

	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)

	asm("bx r3 ");

#else

	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)

	asm("ldr pc, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));

#endif

	asm("user_leave_no_trap_handler: ");

	asm("ldmia	r5, {r4-r11, sp, lr} ");	// Restore the context

	asm("mov	r0, #1 ");					// return(1)

	__JUMP(,lr);							// return

	}

#endif // !__LEAVE_EQUALS_THROW__