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- Replaced MmUpdateStackPageDir by MmUpdatePageDir which can establish

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the pde's of a process for any address range within the kernel address range.

svn path=/trunk/; revision=10603
This commit is contained in:
Hartmut Birr 2004-08-19 21:47:51 +00:00
parent 7314aec7ff
commit 30188f2c6c
3 changed files with 36 additions and 22 deletions
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4
reactos/ntoskrnl/include/internal/mm.h
View file

@ -662,14 +662,14 @@ VOID MmDeleteVirtualMapping(struct _EPROCESS* Process,
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);

15
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 1.23 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 @@ KeAttachProcess (PEPROCESS Process)
{
KIRQL oldlvl;
PETHREAD CurrentThread;
PULONG AttachedProcessPageDir;
ULONG PageDir;
DPRINT("KeAttachProcess(Process %x)\n",Process);
@ -56,10 +55,6 @@ KeAttachProcess (PEPROCESS Process)
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 @@ KeAttachProcess (PEPROCESS Process)
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;

39
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 1.70 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 @@ MmGetPhysicalAddress(PVOID vaddr)
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)
{
LocalPageDir[EntryBase] = MmGlobalKernelPageDirectory[EntryBase];
KEBUGCHECK(0);
}
if (EntryBase != EntryTop && 0 == LocalPageDir[EntryTop])
StartOffset = ADDR_TO_PDE_OFFSET(Address);
EndOffset = ADDR_TO_PDE_OFFSET(Address + Size);
if (Process != NULL && Process != PsGetCurrentProcess())
{
LocalPageDir[EntryTop] = MmGlobalKernelPageDirectory[EntryTop];
Pde = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase.u.LowPart >> PAGE_SHIFT);
}
else
{
Pde = (PULONG)PAGEDIRECTORY_MAP;
}
for (Offset = StartOffset; Offset <= EndOffset; Offset++)
{
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)
{