Symaptic: os/kernelhwsrv/kernel/eka/memmodel/epoc/direct/arm/xkernel.cpp@bde4ae8d615e

     1 // Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of the License "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // e32\memmodel\epoc\direct\arm\xkernel.cpp

    15 //

    16 //

    18 #include "arm_mem.h"

    20 /********************************************

    21  * Thread

    22  ********************************************/

    24 TInt DArmPlatThread::SetupContext(SThreadCreateInfo& anInfo)

    25 	{

    26 #ifndef __SMP__

    27 	if(iThreadType==EThreadUser)

    28 		iNThread.iSpare3 /*iUserContextType*/ = NThread::EContextUndefined;

    29 #endif

    30 	return KErrNone;

    31 	}

    33 DArmPlatProcess::DArmPlatProcess()

    34 	{}

    36 DArmPlatProcess::~DArmPlatProcess()

    37 	{

    38 	__KTRACE_OPT(KMMU,Kern::Printf("DArmPlatProcess destruct"));

    39 	DMemModelProcess::Destruct();

    40 	}

    42 TBool Exc::IsMagic(TLinAddr /*anAddress*/)

    43 //

    44 // Return TRUE if anAddress is a 'magic' exception handling instruction

    45 //

    46 	{

    47 	return EFalse;

    48 	}

    50 void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext)

    51 	{

    52 	aThread->iIpcClient = 0;

    53 	TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap;

    54 	TArmExcInfo& info=*(TArmExcInfo*)aContext;

    55 	if (info.iExcCode==EArmExceptionDataAbort)

    56 		{

    57 		TUint32 opcode = *(TUint32*)info.iR15;		// faulting instruction

    58 		if (opcode>=0xf0000000)

    59 			return;									// not a load/store so fault the kernel

    60 		TUint32 opc1 = (opcode>>25)&7;

    61 		TBool load;

    62 		if ( (opc1==2) || (opc1==4) || (opc1==3 && !(opcode&0x10)) )

    63 			load=opcode & 0x00100000;				// bit 20=1 for load, 0 for store

    64 		else if (opc1==0)

    65 			{

    66 			TUint32 opc2 = (opcode>>4)&0xf;

    67 			if (opc2==0x0b)

    68 				load=opcode & 0x00100000;			// bit 20=1 for load, 0 for store

    69 			else if ((opc2&0x0d)==0x0d)

    70 				{

    71 				if (opcode&0x00100000)

    72 					load=ETrue;						// LDRSB/LDRSH

    73 				else

    74 					load=(opcode&0x20)^0x20;		// LDRD/STRD, bit5=1 for STRD, 0 for LDRD

    75 				}

    76 			else

    77 				return;								// not a load/store so fault the kernel

    78 			}

    79 		else

    80 			return;									// not a load/store so fault the kernel

    82 		if ((load && !xt.iDir) || (!load && xt.iDir))

    83 			xt.Exception(KErrBadDescriptor);	// problem accessing remote address - 'leave' so an error code will be returned

    84 		NKern::UnlockSystem();			// else assume problem accessing local address - return and panic current thread as usual

    85 		}

    86 	// otherwise return and fault kernel

    87 	}

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--