- Replaced MmUpdateStackPageDir by MmUpdatePageDir which can establish 
  the pde's of a process for any address range within the kernel address range.

reactos/ntoskrnl/include/internal

diff -u -r1.85 -r1.86
--- mm.h	8 Aug 2004 20:33:17 -0000	1.85
+++ mm.h	19 Aug 2004 21:47:51 -0000	1.86
@@ -662,14 +662,14 @@

 			    BOOL* WasDirty,
 			    PPFN_TYPE Page);
 

-VOID MmUpdateStackPageDir(PULONG LocalPageDir, struct _KTHREAD* KThread);
-

 BOOLEAN MmIsDirtyPage(struct _EPROCESS* Process, PVOID Address);
 
 VOID MmMarkPageMapped(PFN_TYPE Page);
 
 VOID MmMarkPageUnmapped(PFN_TYPE Page);
 

+VOID MmUpdatePageDir(PEPROCESS Process, PVOID Address, ULONG Size);
+

 /* wset.c ********************************************************************/
 
 NTSTATUS MmTrimUserMemory(ULONG Target, ULONG Priority, PULONG NrFreedPages);

reactos/ntoskrnl/ke

diff -u -r1.23 -r1.24
--- process.c	15 Aug 2004 16:39:05 -0000	1.23
+++ process.c	19 Aug 2004 21:47:51 -0000	1.24
@@ -16,7 +16,7 @@

  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

-/* $Id: process.c,v 1.23 2004/08/15 16:39:05 chorns Exp $

+/* $Id: process.c,v 1.24 2004/08/19 21:47:51 hbirr Exp $

  *
  * PROJECT:         ReactOS kernel
  * FILE:            ntoskrnl/ke/process.c

@@ -43,7 +43,6 @@

 {
    KIRQL oldlvl;
    PETHREAD CurrentThread;

-   PULONG AttachedProcessPageDir;

    ULONG PageDir;
    
    DPRINT("KeAttachProcess(Process %x)\n",Process);

@@ -56,10 +55,6 @@

 	KEBUGCHECK(INVALID_PROCESS_ATTACH_ATTEMPT);
      }
    

-   KeRaiseIrql(DISPATCH_LEVEL, &oldlvl);
-
-   KiSwapApcEnvironment(&CurrentThread->Tcb, &Process->Pcb);
-

    /* The stack of the current process may be located in a page which is
       not present in the page directory of the process we're attaching to.
       That would lead to a page fault when this function returns. However,

@@ -69,9 +64,11 @@

       To prevent this, make sure the page directory of the process we're
       attaching to is up-to-date. */
 

-   AttachedProcessPageDir = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase.QuadPart >> PAGE_SHIFT);
-   MmUpdateStackPageDir(AttachedProcessPageDir, &CurrentThread->Tcb);
-   ExUnmapPage(AttachedProcessPageDir);

+   MmUpdatePageDir(Process, (PVOID)CurrentThread->Tcb.StackLimit, MM_STACK_SIZE);
+
+   KeRaiseIrql(DISPATCH_LEVEL, &oldlvl);
+
+   KiSwapApcEnvironment(&CurrentThread->Tcb, &Process->Pcb);

 
    CurrentThread->OldProcess = PsGetCurrentProcess();
    CurrentThread->ThreadsProcess = Process;

reactos/ntoskrnl/mm/i386

diff -u -r1.70 -r1.71
--- page.c	15 Aug 2004 16:39:09 -0000	1.70
+++ page.c	19 Aug 2004 21:47:51 -0000	1.71
@@ -16,7 +16,7 @@

  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

-/* $Id: page.c,v 1.70 2004/08/15 16:39:09 chorns Exp $

+/* $Id: page.c,v 1.71 2004/08/19 21:47:51 hbirr Exp $

  *
  * PROJECT:     ReactOS kernel
  * FILE:        ntoskrnl/mm/i386/page.c

@@ -1150,23 +1150,40 @@

    return p;
 }
 

-
-VOID
-MmUpdateStackPageDir(PULONG LocalPageDir, PKTHREAD PThread)

+VOID MmUpdatePageDir(PEPROCESS Process, PVOID Address, ULONG Size)

 {

-   unsigned EntryBase = ADDR_TO_PDE_OFFSET(PThread->StackLimit);
-   unsigned EntryTop  = ADDR_TO_PDE_OFFSET((char*)PThread->InitialStack - PAGE_SIZE);

+   PULONG Pde;
+   ULONG StartOffset, EndOffset, Offset; 

-   if (0 == LocalPageDir[EntryBase])

+   if (Address < (PVOID)KERNEL_BASE)
+   {
+      KEBUGCHECK(0);
+   }
+   
+   StartOffset = ADDR_TO_PDE_OFFSET(Address);
+   EndOffset = ADDR_TO_PDE_OFFSET(Address + Size);
+   
+   if (Process != NULL && Process != PsGetCurrentProcess())
+   {
+      Pde = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase.u.LowPart >> PAGE_SHIFT);
+   }
+   else

    {

-      LocalPageDir[EntryBase] = MmGlobalKernelPageDirectory[EntryBase];

+      Pde = (PULONG)PAGEDIRECTORY_MAP;

    }

-   if (EntryBase != EntryTop && 0 == LocalPageDir[EntryTop])

+   for (Offset = StartOffset; Offset <= EndOffset; Offset++) 

    {

-      LocalPageDir[EntryTop] = MmGlobalKernelPageDirectory[EntryTop];

+      if (Offset != ADDR_TO_PDE_OFFSET(PAGETABLE_MAP))
+      {
+         InterlockedCompareExchange(&Pde[Offset], MmGlobalKernelPageDirectory[Offset], 0);
+      }
+   }
+   if (Pde != (PULONG)PAGEDIRECTORY_MAP)
+   {
+      ExUnmapPage(Pde);

    }
 }

-

+	    

 VOID INIT_FUNCTION
 MmInitGlobalKernelPageDirectory(VOID)
 {