Don't use more than a single page for a TEB (forgotten file)

reactos/ntoskrnl/ps

diff -u -r1.76 -r1.77
--- kill.c	28 Sep 2004 15:02:29 -0000	1.76
+++ kill.c	1 Oct 2004 20:29:58 -0000	1.77
@@ -1,4 +1,4 @@

-/* $Id: kill.c,v 1.76 2004/09/28 15:02:29 weiden Exp $

+/* $Id: kill.c,v 1.77 2004/10/01 20:29:58 gvg Exp $

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

@@ -113,6 +113,7 @@

    BOOLEAN Last;
    PEPROCESS CurrentProcess;
    SIZE_T Length = PAGE_SIZE;

+   PVOID TebBlock;

 
    KeLowerIrql(PASSIVE_LEVEL);
 

@@ -149,10 +150,22 @@

    /* Free the TEB */
    if(CurrentThread->Tcb.Teb)
    {

+     DPRINT("Decommit teb at %p\n", CurrentThread->Tcb.Teb);
+     ExAcquireFastMutex(&CurrentProcess->TebLock);
+     TebBlock = MM_ROUND_DOWN(CurrentThread->Tcb.Teb, MM_VIRTMEM_GRANULARITY);

      ZwFreeVirtualMemory(NtCurrentProcess(),
                          (PVOID *)&CurrentThread->Tcb.Teb,
                          &Length,

-                         MEM_RELEASE);

+                         MEM_DECOMMIT);
+     DPRINT("teb %p, TebBlock %p\n", CurrentThread->Tcb.Teb, TebBlock);
+     if (TebBlock != CurrentProcess->TebBlock ||
+         CurrentProcess->TebBlock == CurrentProcess->TebLastAllocated)
+       {
+         MmLockAddressSpace(&CurrentProcess->AddressSpace);
+         MmReleaseMemoryAreaIfDecommitted(CurrentProcess, &CurrentProcess->AddressSpace, TebBlock);
+         MmUnlockAddressSpace(&CurrentProcess->AddressSpace);
+       }
+     ExReleaseFastMutex(&CurrentProcess->TebLock);

    }
 
    /* abandon all owned mutants */