1 // Copyright (c) 2008-2009 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\kernel\arm\cscmdatasave.cpp |
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15 // SCM - Arm portion |
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16 // |
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17 // |
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18 |
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19 #define __INCLUDE_REG_OFFSETS__ // for SP_R13U in nk_plat.h |
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20 |
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21 |
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22 #include "arm_mem.h" |
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23 #include "nk_plat.h" |
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24 #include <scmdatatypes.h> |
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25 #include <scmdatasave.h> |
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26 |
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27 |
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28 /** |
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29 * Reads the CPU registers at the time of the crash |
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30 * @param aRegs struct to store the resulting CPU registers |
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31 */ |
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32 void SCMDataSave::ReadCPURegisters(SFullArmRegSet& aRegs) |
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33 { |
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34 aRegs =*(SFullArmRegSet*)iMonitor->iRegs; |
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35 } |
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36 |
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37 /** |
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38 * Reads the user registers for a given thread - may not be the current thread |
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39 * @param aThread thread whose registers we want to read |
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40 * @param aRegs registers will be written here if available |
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41 * @return KErrArgument if aThread is the current thread or any of the system wide error codes |
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42 */ |
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43 TInt SCMDataSave::ReadUserRegisters(DThread* aThread, TArmRegSet& aRegs, TUint32& aAvailableRegs) |
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44 { |
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45 TFileName filename; |
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46 aThread->TraceAppendFullName(filename, EFalse); |
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47 |
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48 //we retrieve the registers differently for the current thread |
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49 if(aThread == &Kern::CurrentThread()) |
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50 { |
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51 return KErrArgument; |
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52 } |
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53 |
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54 TUint32* stackPointer = (TUint32*)aThread->iNThread.iSavedSP; //Still need to check pointer somehow |
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55 TUint32* stackTop = (TUint32*)((TUint32)aThread->iNThread.iStackBase +(TUint32)aThread->iNThread.iStackSize); |
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56 TArmReg* out = (TArmReg*)(&aRegs); |
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57 |
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58 //Get a pointer to this threads context table |
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59 NThread::TUserContextType type = aThread->iNThread.UserContextType(); |
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60 const TArmContextElement* table = aThread->iNThread.UserContextTables()[type]; |
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61 |
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62 aAvailableRegs = 0; |
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63 for(TInt i = 0; i<KArmRegisterCount; ++i) |
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64 { |
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65 TInt value = table[i].iValue; |
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66 TInt type = table[i].iType; |
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67 |
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68 if(type == TArmContextElement::EOffsetFromSp) |
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69 { |
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70 value = stackPointer[value]; |
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71 aAvailableRegs |= (1<<i); |
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72 } |
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73 else if(type == TArmContextElement::EOffsetFromStackTop) |
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74 { |
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75 value = stackTop[-value]; |
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76 aAvailableRegs |= (1<<i); |
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77 } |
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78 else if(type == TArmContextElement::ESpPlusOffset) |
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79 { |
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80 value = (TInt)(stackPointer + value); |
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81 aAvailableRegs |= (1<<i); |
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82 } |
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83 |
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84 out[i] = value; |
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85 } |
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86 |
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87 return KErrNone; |
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88 } |
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89 |
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90 /** |
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91 * Reads the system registers for a given thread |
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92 * Can not be used on the current thread |
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93 * @param aThread |
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94 * @param aRegs |
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95 * @param aAvailableRegs |
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96 * @return KErrArgument if aThread is the current thread or any of the system wide error codes |
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97 */ |
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98 TInt SCMDataSave::ReadSystemRegisters(DThread* aThread, TArmRegSet& aRegs, TUint32& aAvailableRegs) |
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99 { |
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100 if(aThread == &Kern::CurrentThread()) |
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101 { |
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102 return KErrArgument; |
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103 } |
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104 |
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105 TFileName filename; |
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106 aThread->TraceAppendFullName(filename, EFalse); |
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107 |
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108 TUint32* stackPointer = (TUint32*)aThread->iNThread.iSavedSP; |
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109 TUint32* stackTop = (TUint32*)((TUint32)aThread->iNThread.iStackBase +(TUint32)aThread->iNThread.iStackSize); |
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110 TArmReg* out = (TArmReg*)(&aRegs); |
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111 |
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112 //Get a pointer to this threads context table |
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113 const TArmContextElement* table = aThread->iNThread.UserContextTables()[NThread::EContextKernel]; |
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114 |
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115 aAvailableRegs = 0; |
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116 for(TInt i = 0; i<KArmRegisterCount; ++i) |
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117 { |
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118 TInt value = table[i].iValue; |
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119 TInt type = table[i].iType; |
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120 |
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121 if(type == TArmContextElement::EOffsetFromSp) |
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122 { |
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123 //ensure we are still on the stack |
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124 if(stackPointer + value >= stackTop) |
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125 continue; |
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126 |
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127 value = stackPointer[value]; |
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128 aAvailableRegs |= (1<<i); |
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129 } |
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130 else if(type == TArmContextElement::EOffsetFromStackTop) |
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131 { |
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132 //ensure we are still on the stack |
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133 if(stackTop - value < (TUint32*)aThread->iNThread.iStackBase) |
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134 continue; |
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135 |
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136 value = stackTop[-value]; |
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137 aAvailableRegs |= (1<<i); |
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138 } |
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139 else if(type == TArmContextElement::ESpPlusOffset) |
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140 { |
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141 value = (TInt)(stackPointer + value); |
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142 aAvailableRegs |= (1<<i); |
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143 } |
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144 |
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145 out[i] = value; |
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146 } |
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147 |
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148 return KErrNone; |
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149 } |
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150 |
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151 //EOF |
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152 |
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