1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/kernel/eka/euser/epoc/arm/uc_trp.cia	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,109 @@
     1.4 +// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// e32\euser\epoc\arm\uc_trp.cia
    1.18 +// 
    1.19 +//
    1.20 +
    1.21 +#include <e32cia.h>
    1.22 +#include <u32std.h>
    1.23 +#include <e32panic.h>
    1.24 +#include <u32exec.h>
    1.25 +#include "uc_std.h"
    1.26 +
    1.27 +//  With -fvtable-thunks
    1.28 +const TInt KVTableTrapOffset=8;
    1.29 +const TInt KVTableLeaveOffset=16;
    1.30 +
    1.31 +//  Without -fvtable-thunks
    1.32 +//  const TInt KVTableTrapOffset=12;
    1.33 +//  const TInt KVTableLeaveOffset=28;
    1.34 +
    1.35 +
    1.36 +#ifndef __LEAVE_EQUALS_THROW__
    1.37 +
    1.38 +EXPORT_C __NAKED__ TInt TTrap::Trap(TInt & /*aResult*/)
    1.39 +//
    1.40 +// Save the enter frame state and return 0.
    1.41 +//
    1.42 +	{
    1.43 +
    1.44 +	asm("mov r2, #0 ");						// aResult==KErrNone
    1.45 +	asm("str r2, [r1, #0] ");				// iResult=(&aResult)
    1.46 +	asm("str r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));
    1.47 +	asm("stmia r0, {r4-r11, sp, lr} ");		// Save the context
    1.48 +	asm("stmfd sp!, {r4,lr} ");
    1.49 +	asm("bl  " CSM_ZN4Exec13PushTrapFrameEP5TTrap);
    1.50 +	asm("cmp r0, #0 ");						// == NULL
    1.51 +	asm("ldrne r3, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));
    1.52 +	asm("beq ttrap_trap_no_trap_handler ");
    1.53 +#ifdef __SUPPORT_THUMB_INTERWORKING
    1.54 +	asm("ldr r3, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));
    1.55 +	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()
    1.56 +	asm("bx r3 ");
    1.57 +#else
    1.58 +	asm("adr lr, __ttrap_trap_return ");	// iHandler->Trap()
    1.59 +	asm("ldr pc, [r3, #%a0]" : : "i" (_TTRAPHANDLER_TRAP_OFFSET_));
    1.60 +#endif
    1.61 +	asm("__ttrap_trap_return: ");
    1.62 +	asm("mov r0, #0							");
    1.63 +	asm("ttrap_trap_no_trap_handler: ");
    1.64 +	__POPRET("r4,");
    1.65 +	}
    1.66 +
    1.67 +extern void PanicNoTrapFrame();
    1.68 +
    1.69 +
    1.70 +
    1.71 +EXPORT_C __NAKED__ void User::Leave(TInt /*aReason*/)
    1.72 +/**
    1.73 +Leaves the currently executing function, unwinds the call stack, and returns
    1.74 +from the most recently entered trap harness.
    1.75 +
    1.76 +@param aReason The value returned from the most recent call to TRAP or TRAPD.
    1.77 +               This is known as the reason code and, typically, it gives the
    1.78 +               reason for the environment or user error causing this leave
    1.79 +               to occur.
    1.80 +              
    1.81 +@see TRAP
    1.82 +@see TRAPD              
    1.83 +*/
    1.84 +	{
    1.85 +
    1.86 +	asm("mov r4, r0 ");						// Save aReason
    1.87 +	asm("bl  " CSM_ZN4Exec12PopTrapFrameEv);			// Returns the current TTrap
    1.88 +    asm("cmp r0, #0 ");
    1.89 +    asm("bleq  " CSM_Z16PanicNoTrapFramev);
    1.90 +	asm("ldr r1, [r0, #%a0]" : : "i" _FOFF(TTrap,iResult));
    1.91 +	asm("mov r5, r0 ");						// Save it for later
    1.92 +	asm("ldr r0, [r0, #%a0]" : : "i" _FOFF(TTrap,iHandler));
    1.93 +	asm("str r4, [r1, #0] ");				// *(pT->iResult)=aReason
    1.94 +	asm("cmp r0, #0 ");
    1.95 +	asm("ldrne r2, [r0, #%a0]" : : "i" (_TTRAPHANDLER_VPTR_OFFSET_));
    1.96 +	asm("beq user_leave_no_trap_handler ");	// No trap handler
    1.97 +	asm("mov r1, r4 ");						// Pass aReason
    1.98 +#ifdef __SUPPORT_THUMB_INTERWORKING
    1.99 +	asm("ldr r3, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));
   1.100 +	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)
   1.101 +	asm("bx r3 ");
   1.102 +#else
   1.103 +	asm("adr lr, user_leave_no_trap_handler ");	// iHandler->Leave(aReason)
   1.104 +	asm("ldr pc, [r2, #%a0]" : : "i" (_TTRAPHANDLER_LEAVE_OFFSET_));
   1.105 +#endif
   1.106 +	asm("user_leave_no_trap_handler: ");
   1.107 +	asm("ldmia	r5, {r4-r11, sp, lr} ");	// Restore the context
   1.108 +	asm("mov	r0, #1 ");					// return(1)
   1.109 +	__JUMP(,lr);							// return
   1.110 +	}
   1.111 +
   1.112 +#endif // !__LEAVE_EQUALS_THROW__