- Canceled my last changes.

reactos/ntoskrnl/include/internal/i386

diff -u -r1.7 -r1.8
--- fpu.h	27 Nov 2004 16:12:26 -0000	1.7
+++ fpu.h	27 Nov 2004 23:50:26 -0000	1.8
@@ -78,9 +78,6 @@

 BOOL
 KiContextToFxSaveArea(PFX_SAVE_AREA FxSaveArea, PCONTEXT Context);
 

-VOID
-KiClearFloatingPointState(BOOLEAN Save);
-

 #endif /* !__ASM__ */
 
 #endif /* __NTOSKRNL_INCLUDE_INTERNAL_I386_FPU_H */

reactos/ntoskrnl/ke/i386

diff -u -r1.18 -r1.19
--- fpu.c	27 Nov 2004 16:12:26 -0000	1.18
+++ fpu.c	27 Nov 2004 23:50:26 -0000	1.19
@@ -1,4 +1,4 @@

-/* $Id: fpu.c,v 1.18 2004/11/27 16:12:26 hbirr Exp $

+/* $Id: fpu.c,v 1.19 2004/11/27 23:50:26 hbirr Exp $

  *
  *  ReactOS kernel
  *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team

@@ -403,44 +403,6 @@

   return STATUS_SUCCESS;
 }
 

-VOID
-KiClearFloatingPointState(BOOLEAN Save)
-{
-   PKTHREAD CurrentThread;
-   PFX_SAVE_AREA FxSaveArea;
-
-   ASSERT(KeGetCurrentIrql() >= DISPATCH_LEVEL);
-
-   CurrentThread = KeGetCurrentThread();
-
-   if (CurrentThread->NpxState & NPX_STATE_DIRTY)
-   {
-      if (Save)
-      {
-         FxSaveArea = (PFX_SAVE_AREA)((char *)CurrentThread->InitialStack - sizeof (FX_SAVE_AREA));
-         if (FxsrSupport)
-         {
-            asm volatile("fxsave %0" : : "m"(FxSaveArea->U.FxArea));
-         }
-         else
-         {
-            asm volatile("fnsave %0" : : "m"(FxSaveArea->U.FnArea));
-         }
-         CurrentThread->NpxState = NPX_STATE_VALID;
-      }
-      else
-      {
-         CurrentThread->NpxState = NPX_STATE_INVALID;
-      }
-      Ke386SetCr0(Ke386GetCr0() | X86_CR0_TS);
-   }
-   if (KeGetCurrentKPCR()->PrcbData.NpxThread == CurrentThread)
-   {
-      KeGetCurrentKPCR()->PrcbData.NpxThread = NULL;
-   }
-}
-  
-

 NTSTATUS
 KiHandleFpuFault(PKTRAP_FRAME Tf, ULONG ExceptionNr)
 {

reactos/ntoskrnl/ps

diff -u -r1.19 -r1.20
--- w32call.c	27 Nov 2004 16:12:26 -0000	1.19
+++ w32call.c	27 Nov 2004 23:50:27 -0000	1.20
@@ -1,4 +1,4 @@

-/* $Id: w32call.c,v 1.19 2004/11/27 16:12:26 hbirr Exp $

+/* $Id: w32call.c,v 1.20 2004/11/27 23:50:27 hbirr Exp $

  *
  * COPYRIGHT:              See COPYING in the top level directory
  * PROJECT:                ReactOS kernel

@@ -45,7 +45,6 @@

   PKTRAP_FRAME SavedTrapFrame;
   PVOID SavedCallbackStack;
   PVOID SavedExceptionStack;

-  BYTE SavedNpxState;

 } NTW32CALL_SAVED_STATE, *PNTW32CALL_SAVED_STATE;
 
 typedef struct

@@ -84,7 +83,6 @@

   PKTRAP_FRAME SavedTrapFrame;
   PVOID SavedCallbackStack;
   PVOID SavedExceptionStack;

-  BYTE SavedNpxState;

 
   Thread = PsGetCurrentThread();
   if (Thread->Tcb.CallbackStack == NULL)

@@ -107,7 +105,7 @@

   SavedTrapFrame = State->SavedTrapFrame;
   SavedCallbackStack = State->SavedCallbackStack;
   SavedExceptionStack = State->SavedExceptionStack;

-  SavedNpxState = State->SavedNpxState;

+

   /*
    * Copy the callback status and the callback result to NtW32Call
    */

@@ -129,14 +127,20 @@

    * Restore the old stack.
    */
   KeRaiseIrql(HIGH_LEVEL, &oldIrql);

-  KiClearFloatingPointState(FALSE);
-  Thread->Tcb.NpxState = SavedNpxState;

+  if ((Thread->Tcb.NpxState & NPX_STATE_VALID) &&
+      ETHREAD_TO_KTHREAD(Thread) != KeGetCurrentKPCR()->PrcbData.NpxThread)
+    {
+      memcpy((char*)InitialStack - sizeof(FX_SAVE_AREA),
+             (char*)Thread->Tcb.InitialStack - sizeof(FX_SAVE_AREA),
+             sizeof(FX_SAVE_AREA));
+    }

   Thread->Tcb.InitialStack = InitialStack;
   Thread->Tcb.StackBase = StackBase;
   Thread->Tcb.StackLimit = StackLimit;
   Thread->Tcb.TrapFrame = SavedTrapFrame;
   Thread->Tcb.CallbackStack = SavedCallbackStack;
   KeGetCurrentKPCR()->TSS->Esp0 = (ULONG)SavedExceptionStack;

+  Ke386SetCr0(Ke386GetCr0() | X86_CR0_TS); /* set TS */

   KeStackSwitchAndRet((PVOID)(OldStack + 1));
 
   /* Should never return. */

@@ -239,7 +243,6 @@

 	}
       return(NULL);
     }

-  DPRINT1("KernelStack %x\n", KernelStack);

   return(KernelStack);
 }
 

@@ -311,15 +314,17 @@

   SavedState.SavedTrapFrame = Thread->Tcb.TrapFrame;
   SavedState.SavedCallbackStack = Thread->Tcb.CallbackStack;
   SavedState.SavedExceptionStack = (PVOID)KeGetCurrentKPCR()->TSS->Esp0;

-
-  KiClearFloatingPointState(TRUE);
-
-  SavedState.SavedNpxState = Thread->Tcb.NpxState;

+  if ((Thread->Tcb.NpxState & NPX_STATE_VALID) &&
+      ETHREAD_TO_KTHREAD(Thread) != KeGetCurrentKPCR()->PrcbData.NpxThread)
+    {
+      memcpy((char*)NewStack + StackSize - sizeof(FX_SAVE_AREA),
+             (char*)SavedState.SavedInitialStack - sizeof(FX_SAVE_AREA),
+             sizeof(FX_SAVE_AREA));
+    }

   Thread->Tcb.InitialStack = Thread->Tcb.StackBase = (char*)NewStack + StackSize;
   Thread->Tcb.StackLimit = (ULONG)NewStack;
   Thread->Tcb.KernelStack = (char*)NewStack + StackSize - sizeof(KTRAP_FRAME) - sizeof(FX_SAVE_AREA);
   KeGetCurrentKPCR()->TSS->Esp0 = (ULONG)Thread->Tcb.InitialStack - sizeof(FX_SAVE_AREA);

-  Thread->Tcb.NpxState = NPX_STATE_INVALID;

   KePushAndStackSwitchAndSysRet((ULONG)&SavedState, Thread->Tcb.KernelStack);
 
   /*