sl@0: // Copyright (c) 1995-2009 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\euser\epoc\arm\uc_trp.cia
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include <e32cia.h>
sl@0: #include <u32std.h>
sl@0: #include <e32panic.h>
sl@0: #include <u32exec.h>
sl@0: #include "uc_std.h"
sl@0: 
sl@0: //  With -fvtable-thunks
sl@0: const TInt KVTableTrapOffset=8;
sl@0: const TInt KVTableLeaveOffset=16;
sl@0: 
sl@0: //  Without -fvtable-thunks
sl@0: //  const TInt KVTableTrapOffset=12;
sl@0: //  const TInt KVTableLeaveOffset=28;
sl@0: 
sl@0: 
sl@0: #ifndef __LEAVE_EQUALS_THROW__
sl@0: 
sl@0: EXPORT_C __NAKED__ TInt TTrap::Trap(TInt & /*aResult*/)
sl@0: //
sl@0: // Save the enter frame state and return 0.
sl@0: //
sl@0: 	{
sl@0: 
sl@0: 	asm("mov r2, #0 ");						// aResult==KErrNone
sl@0: 	asm("str r2, [r1, #0] ");				// iResult=(&aResult)
sl@0: 	asm("str r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));
sl@0: 	asm("stmia r0, {r4-r11, sp, lr} ");		// Save the context
sl@0: 	asm("stmfd sp!, {r4,lr} ");
sl@0: 	asm("bl  " CSM_ZN4Exec13PushTrapFrameEP5TTrap);
sl@0: 	asm("cmp r0, #0 ");						// == NULL
sl@0: 	asm("ldrne r3, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));
sl@0: 	asm("beq ttrap_trap_no_trap_handler ");
sl@0: #ifdef __SUPPORT_THUMB_INTERWORKING
sl@0: 	asm("ldr r3, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));
sl@0: 	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()
sl@0: 	asm("bx r3 ");
sl@0: #else
sl@0: 	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()
sl@0: 	asm("ldr pc, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));
sl@0: #endif
sl@0: 	asm("__ttrap_trap_return: ");
sl@0: 	asm("mov r0, #0							");
sl@0: 	asm("ttrap_trap_no_trap_handler: ");
sl@0: 	__POPRET("r4,");
sl@0: 	}
sl@0: 
sl@0: extern void PanicNoTrapFrame();
sl@0: 
sl@0: 
sl@0: 
sl@0: EXPORT_C __NAKED__ void User::Leave(TInt /*aReason*/)
sl@0: /**
sl@0: Leaves the currently executing function, unwinds the call stack, and returns
sl@0: from the most recently entered trap harness.
sl@0: 
sl@0: @param aReason The value returned from the most recent call to TRAP or TRAPD.
sl@0:                This is known as the reason code and, typically, it gives the
sl@0:                reason for the environment or user error causing this leave
sl@0:                to occur.
sl@0:               
sl@0: @see TRAP
sl@0: @see TRAPD              
sl@0: */
sl@0: 	{
sl@0: 
sl@0: 	asm("mov r4, r0 ");						// Save aReason
sl@0: 	asm("bl  " CSM_ZN4Exec12PopTrapFrameEv);			// Returns the current TTrap
sl@0:     asm("cmp r0, #0 ");
sl@0:     asm("bleq  " CSM_Z16PanicNoTrapFramev);
sl@0: 	asm("ldr r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));
sl@0: 	asm("mov r5, r0 ");						// Save it for later
sl@0: 	asm("ldr r0, [r0, #%a0]" : : "i" _FOFF(TTrap,iHandler));
sl@0: 	asm("str r4, [r1, #0] ");				// *(pT->iResult)=aReason
sl@0: 	asm("cmp r0, #0 ");
sl@0: 	asm("ldrne r2, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));
sl@0: 	asm("beq user_leave_no_trap_handler ");	// No trap handler
sl@0: 	asm("mov r1, r4 ");						// Pass aReason
sl@0: #ifdef __SUPPORT_THUMB_INTERWORKING
sl@0: 	asm("ldr r3, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));
sl@0: 	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)
sl@0: 	asm("bx r3 ");
sl@0: #else
sl@0: 	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)
sl@0: 	asm("ldr pc, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));
sl@0: #endif
sl@0: 	asm("user_leave_no_trap_handler: ");
sl@0: 	asm("ldmia	r5, {r4-r11, sp, lr} ");	// Restore the context
sl@0: 	asm("mov	r0, #1 ");					// return(1)
sl@0: 	__JUMP(,lr);							// return
sl@0: 	}
sl@0: 
sl@0: #endif // !__LEAVE_EQUALS_THROW__