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1 // Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // e32\nkern\arm\ncmonitor.cia |
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15 // Kernel crash debugger - NKERN ARM specific portion |
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16 // |
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17 // |
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18 |
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19 #include <e32cia.h> |
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20 #include <kernel/monitor.h> |
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21 #include "nk_priv.h" |
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22 #include <arm.h> |
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23 |
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24 #ifdef __CPU_HAS_MMU |
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25 #define __USE_CP15_FAULT_INFO__ |
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26 #endif |
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27 |
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28 EXPORT_C __NAKED__ void Monitor::HandleException() |
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29 // |
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30 // Handle an exception while the monitor is running |
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31 // |
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32 { |
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33 asm("mov r3, r1 "); // exception type |
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34 asm("ldr r0, [sp, #24] "); // code address |
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35 #ifdef __USE_CP15_FAULT_INFO__ |
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36 #ifdef __CPU_ARM_HAS_SPLIT_FSR |
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37 asm("cmp r1, #%a0 " : : "i" ((TInt)EArmExceptionPrefetchAbort)); |
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38 asm("mrceq p15, 0, r2, c5, c0, 1"); // r2=instruction fault status |
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39 asm("mrcne p15, 0, r2, c5, c0, 0"); // r2=data fault status |
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40 #ifdef __CPU_ARM_HAS_CP15_IFAR |
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41 asm("mrceq p15, 0, r1, c6, c0, 2"); // r1= IFAR fault address |
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42 asm("mrcne p15, 0, r1, c6, c0, 0"); // r1= DFAR fault address |
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43 #else |
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44 asm("mrc p15, 0, r1, c6, c0"); // r1= FAR fault address |
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45 #endif // __CPU_ARM_HAS_CP15_IFAR |
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46 #else |
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47 asm("mrc p15, 0, r1, c6, c0"); // r1=fault address |
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48 asm("mrc p15, 0, r2, c5, c0"); // r2=fault status |
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49 #endif // __CPU_ARM_HAS_SPLIT_FSR |
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50 #endif // __USE_CP15_FAULT_INFO__ |
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51 asm("add sp, sp, #28 "); // restore mode_abt/mode_und stack balance |
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52 asm("mov r12, #0xd1 "); // back into mode_fiq |
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53 asm("msr cpsr, r12 "); |
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54 asm("ldr r12, __TheMonitorPtr "); |
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55 asm("ldr r12, [r12] "); |
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56 asm("add r12, r12, #%a0" : : "i" _FOFF(Monitor,iExceptionInfo)); |
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57 asm("stmia r12, {r0-r3} "); // store exc info |
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58 asm("mov r0, #%a0" : : "i" ((TInt)KErrAbort)); |
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59 asm("b " CSM_ZN7Monitor5LeaveEi ); |
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60 |
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61 asm("__TheMonitorPtr: "); |
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62 asm(".word TheMonitorPtr "); |
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63 } |
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64 |