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Only update page dir for page containing stack

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svn path=/trunk/; revision=4657
This commit is contained in:
Gé van Geldorp 2003-05-08 05:26:36 +00:00
parent 5966a211e9
commit 77d0973eaa
3 changed files with 13 additions and 17 deletions
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2
reactos/ntoskrnl/include/internal/mm.h
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@ -218,7 +218,7 @@ MmDeleteVirtualMapping(struct _EPROCESS* Process,
BOOL FreePage,
BOOL* WasDirty,
PHYSICAL_ADDRESS* PhysicalPage);
VOID MmUpdatePageDir(PULONG LocalPageDir);
VOID MmUpdatePageDir(PULONG LocalPageDir, PVOID Address);
#define MM_PAGE_CLEAN (0)
#define MM_PAGE_DIRTY (1)

10
reactos/ntoskrnl/ke/process.c
View file

@ -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 1.12 2003/05/07 21:41:03 gvg Exp $
/* $Id: process.c,v 1.13 2003/05/08 05:26:36 gvg Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/process.c
@ -44,6 +44,7 @@ KeAttachProcess (PEPROCESS Process)
{
KIRQL oldlvl;
PETHREAD CurrentThread;
PVOID ESP;
PULONG AttachedProcessPageDir;
ULONG PageDir;
@ -68,8 +69,11 @@ KeAttachProcess (PEPROCESS Process)
To prevent this, make sure the page directory of the process we're
attaching to is up-to-date. */
__asm__("mov %%esp,%0\n\t"
: "=r" (ESP));
AttachedProcessPageDir = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase);
MmUpdatePageDir(AttachedProcessPageDir);
MmUpdatePageDir(AttachedProcessPageDir, ESP);
ExUnmapPage(AttachedProcessPageDir);
CurrentThread->OldProcess = PsGetCurrentProcess();
@ -77,7 +81,7 @@ KeAttachProcess (PEPROCESS Process)
PageDir = Process->Pcb.DirectoryTableBase.u.LowPart;
DPRINT("Switching process context to %x\n",PageDir)
__asm__("movl %0,%%cr3\n\t"
: /* no inputs */
: /* no outputs */
: "r" (PageDir));

18
reactos/ntoskrnl/mm/i386/page.c
View file

@ -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 1.48 2003/05/07 21:41:03 gvg Exp $
/* $Id: page.c,v 1.49 2003/05/08 05:26:36 gvg Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/i386/page.c
@ -1214,21 +1214,13 @@ MmGetPhysicalAddress(PVOID vaddr)
VOID
MmUpdatePageDir(PULONG LocalPageDir)
MmUpdatePageDir(PULONG LocalPageDir, PVOID Address)
{
unsigned Entry;
unsigned Entry = ADDR_TO_PDE_OFFSET(Address);
for (Entry = ADDR_TO_PDE_OFFSET(KERNEL_BASE);
Entry < PAGE_SIZE / sizeof(LONG);
Entry++)
if (0 == LocalPageDir[Entry])
{
/* Skip the page directory */
if (ADDR_TO_PDE_OFFSET(PAGETABLE_MAP) != Entry &&
0 == LocalPageDir[Entry] &&
0 != MmGlobalKernelPageDirectory[Entry])
{
LocalPageDir[Entry] = MmGlobalKernelPageDirectory[Entry];
}
LocalPageDir[Entry] = MmGlobalKernelPageDirectory[Entry];
}
}