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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\multiple\mkernel.cpp |
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15 // |
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16 // |
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17 |
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18 #include "memmodel.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 DThread::AllocateSupervisorStack() |
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25 { |
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26 __KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateSupervisorStack %O %x",this,iSupervisorStackSize)); |
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27 iSupervisorStackSize=Mmu::RoundToPageSize(iSupervisorStackSize); |
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28 if (iThreadType!=EThreadInitial) |
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29 { |
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30 TInt offset=MM::SvStackChunk->Allocate(iSupervisorStackSize,PP::SupervisorThreadStackGuard); |
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31 if (offset<0) |
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32 { |
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33 __KTRACE_FAIL(KErrNoMemory,Kern::Printf("ASS: %d",KErrNoMemory)); |
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34 return KErrNoMemory; |
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35 } |
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36 iSupervisorStack=MM::SvStackChunk->Base()+offset+PP::SupervisorThreadStackGuard; |
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37 iSupervisorStackAllocated = TRUE; |
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38 __KTRACE_OPT(KTHREAD,Kern::Printf("Supervisor stack at %x, size %x",iSupervisorStack,iSupervisorStackSize)); |
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39 } |
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40 return KErrNone; |
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41 } |
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42 |
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43 void DMemModelThread::DoExit1() |
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44 { |
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45 // Regularize the thread state before main exit processing. |
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46 // We must remove any existing alias before we do any operation |
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47 // which requires aliasing (e.g. logon completion). |
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48 __KTRACE_OPT(KTHREAD,Kern::Printf("DMemModelThread %O DoExit1",this)); |
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49 NKern::LockSystem(); |
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50 RemoveAlias(); |
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51 NKern::UnlockSystem(); |
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52 } |
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53 |
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54 void DThread::FreeSupervisorStack() |
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55 { |
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56 __KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeSupervisorStack %O",this)); |
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57 if (iSupervisorStackAllocated) |
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58 { |
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59 TAny* pStack = __e32_atomic_swp_ord_ptr(&iSupervisorStack, 0); |
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60 if (pStack && iThreadType!=EThreadInitial) |
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61 { |
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62 __KTRACE_OPT(KTHREAD,Kern::Printf("Freeing supervisor stack at %08x, size %x",pStack,iSupervisorStackSize)); |
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63 TInt offset=(TUint8*)pStack-MM::SvStackChunk->Base(); |
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64 TInt r=MM::SvStackChunk->Decommit(offset-PP::SupervisorThreadStackGuard,iSupervisorStackSize+PP::SupervisorThreadStackGuard); |
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65 __ASSERT_DEBUG(r==KErrNone, MM::Panic(MM::EDecommitFailed)); |
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66 (void)r; //Supress the warning in urel build |
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67 } |
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68 } |
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69 iSupervisorStackAllocated = FALSE; |
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70 } |
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71 |
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72 TInt DThread::AllocateUserStack(TInt aSize, TBool /*aPaged*/) |
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73 { |
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74 __KTRACE_OPT(KTHREAD,Kern::Printf("DThread::AllocateUserStack %O %x",this,aSize)); |
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75 |
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76 aSize=Mmu::RoundToPageSize(aSize); |
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77 if (aSize>PP::MaxUserThreadStack) |
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78 return KErrTooBig; |
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79 TInt guard=PP::UserThreadStackGuard; |
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80 DProcess* pP=iOwningProcess; |
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81 NKern::LockSystem(); |
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82 DChunk* pC=pP->iDataBssStackChunk; |
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83 if (!pC || pC->Open()!=KErrNone) // so chunk doesn't disappear during Allocate() |
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84 { |
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85 NKern::UnlockSystem(); |
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86 __KTRACE_FAIL(KErrDied,Kern::Printf("AUS1: %d",KErrDied)); |
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87 return KErrDied; |
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88 } |
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89 NKern::UnlockSystem(); |
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90 TInt r=pC->Allocate(aSize,guard); |
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91 TInt s=pC->Close(NULL); // NULL since we didn't add chunk to process again |
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92 if (s & EObjectDeleted) |
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93 { |
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94 __KTRACE_FAIL(KErrDied,Kern::Printf("AUS2: %d",KErrDied)); |
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95 return KErrDied; |
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96 } |
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97 if (r<0) |
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98 { |
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99 __KTRACE_FAIL(r,Kern::Printf("AUS3: %d",r)); |
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100 return r; |
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101 } |
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102 iUserStackSize=aSize; |
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103 iUserStackRunAddress=pP->iDataBssRunAddress+r+guard; |
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104 __KTRACE_OPT(KTHREAD,Kern::Printf("User stack run address at %x",iUserStackRunAddress)); |
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105 return KErrNone; |
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106 } |
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107 |
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108 void DThread::FreeUserStack() |
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109 { |
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110 __KTRACE_OPT(KTHREAD,Kern::Printf("DThread::FreeUserStack %O",this)); |
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111 TLinAddr usr_stack = (TLinAddr)__e32_atomic_swp_ord_ptr(&iUserStackRunAddress, 0); |
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112 if (usr_stack) |
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113 { |
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114 __KTRACE_OPT(KTHREAD,Kern::Printf("Freeing user stack at %x",usr_stack)); |
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115 DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess; |
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116 NKern::LockSystem(); |
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117 DMemModelChunk* pC=(DMemModelChunk*)pP->iDataBssStackChunk; |
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118 if (!pC || pC->Open()!=KErrNone) // so chunk doesn't disappear during Decommit() |
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119 { |
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120 NKern::UnlockSystem(); |
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121 __KTRACE_FAIL(KErrDied,Kern::Printf("FUS")); |
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122 return; |
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123 } |
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124 NKern::UnlockSystem(); |
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125 TInt offset=usr_stack-pP->iDataBssRunAddress; |
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126 TInt r=pC->Decommit(offset-PP::UserThreadStackGuard,iUserStackSize+PP::UserThreadStackGuard); |
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127 __ASSERT_DEBUG(r==KErrNone, MM::Panic(MM::EDecommitFailed)); |
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128 pC->Close(NULL); // NULL since we didn't add chunk to process again |
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129 (void)r; //Supress the warning in urel build |
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130 } |
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131 } |
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132 |
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133 void DThread::IpcExcHandler(TExcTrap* aTrap, DThread* aThread, TAny* aContext) |
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134 { |
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135 aThread->iIpcClient = 0; |
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136 TIpcExcTrap& xt=*(TIpcExcTrap*)aTrap; |
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137 switch (xt.ExcLocation(aThread, aContext)) |
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138 { |
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139 case TIpcExcTrap::EExcRemote: |
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140 // problem accessing remote address - 'leave' so an error code will be returned |
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141 NKern::LockSystem(); |
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142 ((DMemModelThread*)aThread)->RemoveAlias(); |
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143 xt.Exception(KErrBadDescriptor); // does not return |
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144 |
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145 case TIpcExcTrap::EExcLocal: |
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146 // problem accessing local address - return and panic current thread as usual |
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147 NKern::LockSystem(); |
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148 ((DMemModelThread*)aThread)->RemoveAlias(); |
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149 NKern::UnlockSystem(); |
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150 return; |
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151 |
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152 default: |
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153 // otherwise return and fault kernel |
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154 NKern::LockSystem(); |
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155 return; |
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156 } |
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157 } |