reactos/ntoskrnl/ke/amd64/thrdini.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/ke/i386/thread.c
   5  * PURPOSE:         i386 Thread Context Creation
   6  * PROGRAMMER:      Alex Ionescu (alex@relsoft.net)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <ntoskrnl.h>
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 typedef struct _KUINIT_FRAME
  16 {
  17     KSWITCH_FRAME CtxSwitchFrame;
  18     KSTART_FRAME StartFrame;
  19     KTRAP_FRAME TrapFrame;
  20     //FX_SAVE_AREA FxSaveArea;
  21 } KUINIT_FRAME, *PKUINIT_FRAME;
  22
  23 typedef struct _KKINIT_FRAME
  24 {
  25     KSWITCH_FRAME CtxSwitchFrame;
  26     KSTART_FRAME StartFrame;
  27     //FX_SAVE_AREA FxSaveArea;
  28 } KKINIT_FRAME, *PKKINIT_FRAME;
  29
  30 /* FUNCTIONS *****************************************************************/
  31
  32 VOID
  33 NTAPI
  34 KiInitializeContextThread(IN PKTHREAD Thread,
  35                            IN PKSYSTEM_ROUTINE SystemRoutine,
  36                            IN PKSTART_ROUTINE StartRoutine,
  37                            IN PVOID StartContext,
  38                            IN PCONTEXT ContextPointer)
  39 {
  40     //PFX_SAVE_AREA FxSaveArea;
  41     //PFXSAVE_FORMAT FxSaveFormat;
  42     PKSTART_FRAME StartFrame;
  43     PKSWITCH_FRAME CtxSwitchFrame;
  44     PKTRAP_FRAME TrapFrame;
  45     CONTEXT LocalContext;
  46     PCONTEXT Context = NULL;
  47     ULONG ContextFlags;
  48
  49     /* Check if this is a With-Context Thread */
  50     if (ContextPointer)
  51     {
  52         /* Set up the Initial Frame */
  53         PKUINIT_FRAME InitFrame;
  54         InitFrame = (PKUINIT_FRAME)((ULONG_PTR)Thread->InitialStack -
  55                                     sizeof(KUINIT_FRAME));
  56
  57         /* Copy over the context we got */
  58         RtlCopyMemory(&LocalContext, ContextPointer, sizeof(CONTEXT));
  59         Context = &LocalContext;
  60         ContextFlags = CONTEXT_CONTROL;
  61
  62         /* Zero out the trap frame and save area */
  63         RtlZeroMemory(&InitFrame->TrapFrame,
  64                       KTRAP_FRAME_LENGTH);
  65
  66         /* Setup the Fx Area */
  67         //FxSaveArea = &InitFrame->FxSaveArea;
  68
  69 //            /* Get the FX Save Format Area */
  70 //            FxSaveFormat = (PFXSAVE_FORMAT)Context->ExtendedRegisters;
  71 //
  72 //            /* Set an initial state */
  73 //            FxSaveFormat->ControlWord = 0x27F;
  74 //            FxSaveFormat->StatusWord = 0;
  75 //            FxSaveFormat->TagWord = 0;
  76 //            FxSaveFormat->ErrorOffset = 0;
  77 //            FxSaveFormat->ErrorSelector = 0;
  78 //            FxSaveFormat->DataOffset = 0;
  79 //            FxSaveFormat->DataSelector = 0;
  80 //            FxSaveFormat->MXCsr = 0x1F80;
  81
  82         /* Set an intial NPX State */
  83         //Context->FloatSave.Cr0NpxState = 0;
  84         //FxSaveArea->Cr0NpxState = 0;
  85         //FxSaveArea->NpxSavedCpu = 0;
  86
  87         /* Now set the context flags depending on XMM support */
  88         //ContextFlags |= (KeI386FxsrPresent) ? CONTEXT_EXTENDED_REGISTERS :
  89         //                                      CONTEXT_FLOATING_POINT;
  90
  91         /* Set the Thread's NPX State */
  92         Thread->NpxState = 0xA;
  93         Thread->DispatcherHeader.NpxIrql = PASSIVE_LEVEL;
  94
  95         /* Disable any debug regiseters */
  96         Context->ContextFlags &= ~CONTEXT_DEBUG_REGISTERS;
  97
  98         /* Setup the Trap Frame */
  99         TrapFrame = &InitFrame->TrapFrame;
 100
 101         /* Set up a trap frame from the context. */
 102         KeContextToTrapFrame(Context,
 103                              NULL,
 104                              TrapFrame,
 105                              Context->ContextFlags | ContextFlags,
 106                              UserMode);
 107
 108         /* Set SS, DS, ES's RPL Mask properly */
 109         TrapFrame->SegSs |= RPL_MASK;
 110         TrapFrame->SegDs |= RPL_MASK;
 111         TrapFrame->SegEs |= RPL_MASK;
 112         TrapFrame->Dr7 = 0;
 113
 114         /* Set the previous mode as user */
 115         TrapFrame->PreviousMode = UserMode;
 116
 117         /* Terminate the Exception Handler List */
 118         TrapFrame->ExceptionFrame = 0;
 119
 120         /* Setup the Stack for KiThreadStartup and Context Switching */
 121         StartFrame = &InitFrame->StartFrame;
 122         CtxSwitchFrame = &InitFrame->CtxSwitchFrame;
 123
 124         /* Tell the thread it will run in User Mode */
 125         Thread->PreviousMode = UserMode;
 126
 127         /* Tell KiThreadStartup of that too */
 128 //        StartFrame->UserThread = TRUE;
 129     }
 130     else
 131     {
 132         /* Set up the Initial Frame for the system thread */
 133         PKKINIT_FRAME InitFrame;
 134         InitFrame = (PKKINIT_FRAME)((ULONG_PTR)Thread->InitialStack -
 135                                     sizeof(KKINIT_FRAME));
 136
 137         /* Setup the Fx Area */
 138         //FxSaveArea = &InitFrame->FxSaveArea;
 139         //RtlZeroMemory(FxSaveArea, sizeof(FX_SAVE_AREA));
 140
 141         /* Check if we have Fxsr support */
 142         DPRINT1("FxsrPresent but did nothing\n");
 143 //        /* Set the stub FX area */
 144 //        FxSaveArea->U.FxArea.ControlWord = 0x27F;
 145 //        FxSaveArea->U.FxArea.MXCsr = 0x1F80;
 146
 147         /* No NPX State */
 148         Thread->NpxState = 0xA;
 149
 150         /* Setup the Stack for KiThreadStartup and Context Switching */
 151         StartFrame = &InitFrame->StartFrame;
 152         CtxSwitchFrame = &InitFrame->CtxSwitchFrame;
 153
 154         /* Tell the thread it will run in Kernel Mode */
 155         Thread->PreviousMode = KernelMode;
 156
 157         /* Tell KiThreadStartup of that too */
 158 //        StartFrame->UserThread = FALSE;
 159     }
 160
 161     /* Now setup the remaining data for KiThreadStartup */
 162 //    StartFrame->StartContext = StartContext;
 163 //    StartFrame->StartRoutine = StartRoutine;
 164 //    StartFrame->SystemRoutine = SystemRoutine;
 165
 166     /* And set up the Context Switch Frame */
 167 //    CtxSwitchFrame->RetAddr = KiThreadStartup;
 168 //    CtxSwitchFrame->ApcBypassDisable = TRUE;
 169 //    CtxSwitchFrame->ExceptionList = EXCEPTION_CHAIN_END;;
 170
 171     /* Save back the new value of the kernel stack. */
 172     Thread->KernelStack = (PVOID)CtxSwitchFrame;
 173
 174 }
 175
 176 /* EOF */
 177
 178