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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\memmodel\epoc\direct\arm\xkernel.cpp |
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15 // |
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16 // |
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17 |
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18 #include "arm_mem.h" |
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19 |
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20 /******************************************** |
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21 * Thread |
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22 ********************************************/ |
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23 |
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24 TInt DArmPlatThread::SetupContext(SThreadCreateInfo& anInfo) |
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25 { |
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26 #ifndef __SMP__ |
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27 if(iThreadType==EThreadUser) |
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28 iNThread.iSpare3 /*iUserContextType*/ = NThread::EContextUndefined; |
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29 #endif |
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30 return KErrNone; |
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31 } |
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32 |
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33 DArmPlatProcess::DArmPlatProcess() |
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34 {} |
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35 |
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36 DArmPlatProcess::~DArmPlatProcess() |
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37 { |
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38 __KTRACE_OPT(KMMU,Kern::Printf("DArmPlatProcess destruct")); |
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39 DMemModelProcess::Destruct(); |
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40 } |
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41 |
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42 TBool Exc::IsMagic(TLinAddr /*anAddress*/) |
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43 // |
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44 // Return TRUE if anAddress is a 'magic' exception handling instruction |
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45 // |
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46 { |
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47 return EFalse; |
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48 } |
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49 |
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50 void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext) |
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51 { |
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52 aThread->iIpcClient = 0; |
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53 TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap; |
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54 TArmExcInfo& info=*(TArmExcInfo*)aContext; |
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55 if (info.iExcCode==EArmExceptionDataAbort) |
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56 { |
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57 TUint32 opcode = *(TUint32*)info.iR15; // faulting instruction |
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58 if (opcode>=0xf0000000) |
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59 return; // not a load/store so fault the kernel |
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60 TUint32 opc1 = (opcode>>25)&7; |
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61 TBool load; |
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62 if ( (opc1==2) || (opc1==4) || (opc1==3 && !(opcode&0x10)) ) |
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63 load=opcode & 0x00100000; // bit 20=1 for load, 0 for store |
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64 else if (opc1==0) |
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65 { |
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66 TUint32 opc2 = (opcode>>4)&0xf; |
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67 if (opc2==0x0b) |
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68 load=opcode & 0x00100000; // bit 20=1 for load, 0 for store |
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69 else if ((opc2&0x0d)==0x0d) |
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70 { |
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71 if (opcode&0x00100000) |
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72 load=ETrue; // LDRSB/LDRSH |
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73 else |
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74 load=(opcode&0x20)^0x20; // LDRD/STRD, bit5=1 for STRD, 0 for LDRD |
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75 } |
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76 else |
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77 return; // not a load/store so fault the kernel |
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78 } |
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79 else |
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80 return; // not a load/store so fault the kernel |
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81 |
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82 if ((load && !xt.iDir) || (!load && xt.iDir)) |
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83 xt.Exception(KErrBadDescriptor); // problem accessing remote address - 'leave' so an error code will be returned |
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84 NKern::UnlockSystem(); // else assume problem accessing local address - return and panic current thread as usual |
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85 } |
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86 // otherwise return and fault kernel |
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87 } |
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88 |