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- Update two pde's if the kernel stack crosses a 4MB boundary.

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svn path=/trunk/; revision=4821
This commit is contained in:
Hartmut Birr 2003-06-01 19:50:04 +00:00
parent d4ce775b60
commit 210252c422
3 changed files with 15 additions and 14 deletions
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2
reactos/ntoskrnl/include/internal/mm.h
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@ -235,7 +235,7 @@ MmDeleteVirtualMapping(struct _EPROCESS* Process,
BOOL FreePage, BOOL FreePage,
BOOL* WasDirty, BOOL* WasDirty,
PHYSICAL_ADDRESS* PhysicalPage); PHYSICAL_ADDRESS* PhysicalPage);
VOID MmUpdatePageDir(PULONG LocalPageDir, PVOID Address); VOID MmUpdateStackPageDir(PULONG LocalPageDir, struct _KTHREAD* KThread);
#define MM_PAGE_CLEAN (0) #define MM_PAGE_CLEAN (0)
#define MM_PAGE_DIRTY (1) #define MM_PAGE_DIRTY (1)

8
reactos/ntoskrnl/ke/process.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/ */
/* $Id: process.c,v 1.13 2003/05/08 05:26:36 gvg Exp $ /* $Id: process.c,v 1.14 2003/06/01 19:50:04 hbirr Exp $
* *
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/process.c * FILE: ntoskrnl/ke/process.c
@ -44,7 +44,6 @@ KeAttachProcess (PEPROCESS Process)
{ {
KIRQL oldlvl; KIRQL oldlvl;
PETHREAD CurrentThread; PETHREAD CurrentThread;
PVOID ESP;
PULONG AttachedProcessPageDir; PULONG AttachedProcessPageDir;
ULONG PageDir; ULONG PageDir;
@ -69,11 +68,8 @@ KeAttachProcess (PEPROCESS Process)
To prevent this, make sure the page directory of the process we're To prevent this, make sure the page directory of the process we're
attaching to is up-to-date. */ attaching to is up-to-date. */
__asm__("mov %%esp,%0\n\t"
: "=r" (ESP));
AttachedProcessPageDir = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase); AttachedProcessPageDir = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase);
MmUpdatePageDir(AttachedProcessPageDir, ESP); MmUpdateStackPageDir(AttachedProcessPageDir, &CurrentThread->Tcb);
ExUnmapPage(AttachedProcessPageDir); ExUnmapPage(AttachedProcessPageDir);
CurrentThread->OldProcess = PsGetCurrentProcess(); CurrentThread->OldProcess = PsGetCurrentProcess();

19
reactos/ntoskrnl/mm/i386/page.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/ */
/* $Id: page.c,v 1.50 2003/05/17 13:45:04 hbirr Exp $ /* $Id: page.c,v 1.51 2003/06/01 19:50:04 hbirr Exp $
* *
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/i386/page.c * FILE: ntoskrnl/mm/i386/page.c
@ -115,10 +115,10 @@ ProtectToPTE(ULONG flProtect)
#define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (4 * 1024 * 1024)) #define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (4 * 1024 * 1024))
#define ADDR_TO_PDE(v) (PULONG)(PAGEDIRECTORY_MAP + \ #define ADDR_TO_PDE(v) (PULONG)(PAGEDIRECTORY_MAP + \
(((ULONG)v / (1024 * 1024))&(~0x3))) ((((ULONG)(v)) / (1024 * 1024))&(~0x3)))
#define ADDR_TO_PTE(v) (PULONG)(PAGETABLE_MAP + ((((ULONG)v / 1024))&(~0x3))) #define ADDR_TO_PTE(v) (PULONG)(PAGETABLE_MAP + ((((ULONG)v / 1024))&(~0x3)))
#define ADDR_TO_PDE_OFFSET(v) (((ULONG)v / (4 * 1024 * 1024))) #define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (4 * 1024 * 1024)))
NTSTATUS Mmi386ReleaseMmInfo(PEPROCESS Process) NTSTATUS Mmi386ReleaseMmInfo(PEPROCESS Process)
{ {
@ -1247,13 +1247,18 @@ MmGetPhysicalAddress(PVOID vaddr)
VOID VOID
MmUpdatePageDir(PULONG LocalPageDir, PVOID Address) MmUpdateStackPageDir(PULONG LocalPageDir, PKTHREAD PThread)
{ {
unsigned Entry = ADDR_TO_PDE_OFFSET(Address); unsigned EntryBase = ADDR_TO_PDE_OFFSET(PThread->StackLimit);
unsigned EntryTop = ADDR_TO_PDE_OFFSET(PThread->InitialStack - PAGE_SIZE);
if (0 == LocalPageDir[Entry]) if (0 == LocalPageDir[EntryBase])
{ {
LocalPageDir[Entry] = MmGlobalKernelPageDirectory[Entry]; LocalPageDir[EntryBase] = MmGlobalKernelPageDirectory[EntryBase];
}
if (EntryBase != EntryTop && 0 == LocalPageDir[EntryTop])
{
LocalPageDir[EntryTop] = MmGlobalKernelPageDirectory[EntryTop];
} }
} }