mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 01:55:19 +00:00
* Call KeBugcheck in MmDeletePageTable/MmFreePageTable if the
address points to the kernel address space. * Check if an other process has inserted a kernel page directory entry while waiting for a page (MmGetPageEntry/MmGetPageEntry2). * Check the kernel page directory only for an entry if the address points to the kernel address space (MmGetPageEntry1/2, MmDeleteVirtualMapping and MmDeletePageFileMapping). * Disabled MmEnableVirtualMapping/MmDisableVirtualMapping. There is no difference between an entry with disabled mapping and a swap entry. svn path=/trunk/; revision=3700
This commit is contained in:
Hartmut Birr
parent
a4b5d8a978
commit
3d3d96c5d6
1 changed files with 252 additions and 160 deletions
|
|
@ -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 1.45 2002/10/01 19:27:25 chorns Exp $
|
||||
/* $Id: page.c,v 1.46 2002/11/05 20:39:03 hbirr Exp $
|
||||
*
|
||||
* PROJECT: ReactOS kernel
|
||||
* FILE: ntoskrnl/mm/i386/page.c
|
||||
|
|
@ -161,7 +161,7 @@ NTSTATUS MmCopyMmInfo(PEPROCESS Src, PEPROCESS Dest)
|
|||
}
|
||||
DPRINT("Addr %x\n",PAGETABLE_MAP / (4*1024*1024));
|
||||
PageDirectory[PAGETABLE_MAP / (4*1024*1024)] =
|
||||
(ULONG)PhysPageDirectory.QuadPart | 0x7;
|
||||
PhysPageDirectory.u.LowPart | PA_PRESENT | PA_READWRITE;
|
||||
|
||||
ExUnmapPage(PageDirectory);
|
||||
|
||||
|
|
@ -180,7 +180,8 @@ VOID MmDeletePageTable(PEPROCESS Process, PVOID Address)
|
|||
*(ADDR_TO_PDE(Address)) = 0;
|
||||
if (Address >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
|
||||
KeBugCheck(0);
|
||||
// MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
|
||||
}
|
||||
FLUSH_TLB;
|
||||
if (Process != NULL && Process != CurrentProcess)
|
||||
|
|
@ -197,31 +198,37 @@ VOID MmFreePageTable(PEPROCESS Process, PVOID Address)
|
|||
ULONG npage;
|
||||
|
||||
if (Process != NULL && Process != CurrentProcess)
|
||||
{
|
||||
KeAttachProcess(Process);
|
||||
}
|
||||
{
|
||||
KeAttachProcess(Process);
|
||||
}
|
||||
|
||||
PageTable = (PULONG)PAGE_ROUND_DOWN((PVOID)ADDR_TO_PTE(Address));
|
||||
for (i = 0; i < 1024; i++)
|
||||
{
|
||||
if (PageTable[i] != 0)
|
||||
{
|
||||
DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
|
||||
((ULONG)Address / 4*1024*1024), i, PageTable[i]);
|
||||
KeBugCheck(0);
|
||||
}
|
||||
}
|
||||
{
|
||||
if (PageTable[i] != 0)
|
||||
{
|
||||
DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
|
||||
((ULONG)Address / 4*1024*1024), i, PageTable[i]);
|
||||
KeBugCheck(0);
|
||||
}
|
||||
}
|
||||
npage = *(ADDR_TO_PDE(Address));
|
||||
*(ADDR_TO_PDE(Address)) = 0;
|
||||
if (Address >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
|
||||
}
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(npage));
|
||||
FLUSH_TLB;
|
||||
|
||||
if (Address >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
// MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
|
||||
KeBugCheck(0);
|
||||
}
|
||||
else
|
||||
{
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(npage));
|
||||
}
|
||||
if (Process != NULL && Process != CurrentProcess)
|
||||
{
|
||||
KeDetachProcess();
|
||||
}
|
||||
{
|
||||
KeDetachProcess();
|
||||
}
|
||||
}
|
||||
|
||||
NTSTATUS MmGetPageEntry2(PVOID PAddress, PULONG* Pte, BOOLEAN MayWait)
|
||||
|
|
@ -229,41 +236,66 @@ NTSTATUS MmGetPageEntry2(PVOID PAddress, PULONG* Pte, BOOLEAN MayWait)
|
|||
* FUNCTION: Get a pointer to the page table entry for a virtual address
|
||||
*/
|
||||
{
|
||||
PULONG Pde;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG Pde, kePde;
|
||||
PHYSICAL_ADDRESS npage;
|
||||
BOOLEAN Free = FALSE;
|
||||
NTSTATUS Status;
|
||||
KIRQL oldIrql;
|
||||
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", Address);
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
|
||||
|
||||
Pde = ADDR_TO_PDE(Address);
|
||||
if ((*Pde) == 0)
|
||||
{
|
||||
if (Address >= KERNEL_BASE &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (PAddress >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
oldIrql = KeRaiseIrqlToSynchLevel();
|
||||
if (*kePde != 0)
|
||||
{
|
||||
(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
else
|
||||
else
|
||||
{
|
||||
NTSTATUS Status;
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
return(Status);
|
||||
}
|
||||
(*Pde) = npage.QuadPart | 0x7;
|
||||
if (Address >= KERNEL_BASE)
|
||||
{
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] =
|
||||
*Pde;
|
||||
}
|
||||
memset((PVOID)PAGE_ROUND_DOWN(ADDR_TO_PTE(Address)), 0, PAGE_SIZE);
|
||||
FLUSH_TLB;
|
||||
KeLowerIrql(oldIrql);
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
KeBugCheck(0);
|
||||
}
|
||||
oldIrql = KeRaiseIrqlToSynchLevel();
|
||||
/* An other thread can set this pde entry, we must check again */
|
||||
if (*kePde == 0)
|
||||
{
|
||||
*kePde = npage.u.LowPart | PA_PRESENT | PA_READWRITE;
|
||||
}
|
||||
else
|
||||
{
|
||||
Free = TRUE;
|
||||
}
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
}
|
||||
*Pte = ADDR_TO_PTE(Address);
|
||||
return(STATUS_SUCCESS);
|
||||
KeLowerIrql(oldIrql);
|
||||
}
|
||||
else
|
||||
{
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
return(Status);
|
||||
}
|
||||
*Pde = npage.u.LowPart | PA_PRESENT | PA_READWRITE | PA_USER;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
}
|
||||
*Pte = (PULONG)ADDR_TO_PTE(PAddress);
|
||||
if (Free)
|
||||
{
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, npage);
|
||||
}
|
||||
return STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
ULONG MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
|
||||
|
|
@ -288,27 +320,30 @@ ULONG MmGetPageEntry1(PVOID PAddress)
|
|||
* FUNCTION: Get a pointer to the page table entry for a virtual address
|
||||
*/
|
||||
{
|
||||
PULONG page_tlb;
|
||||
PULONG page_dir;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG Pde, kePde;
|
||||
ULONG Entry = 0;
|
||||
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", Address);
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
|
||||
|
||||
page_dir = ADDR_TO_PDE(Address);
|
||||
if ((*page_dir) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
DPRINT("page_dir %x *page_dir %x\n",page_dir,*page_dir);
|
||||
if ((*page_dir) == 0)
|
||||
{
|
||||
return(0);
|
||||
}
|
||||
page_tlb = ADDR_TO_PTE(Address);
|
||||
DPRINT("page_tlb %x\n",page_tlb);
|
||||
return(*page_tlb);
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (PAddress >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
Entry = *(PULONG)ADDR_TO_PTE(PAddress);
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
Entry = *(PULONG)ADDR_TO_PTE(PAddress);
|
||||
}
|
||||
return Entry;
|
||||
}
|
||||
|
||||
ULONG MmGetPageEntryForProcess1(PEPROCESS Process, PVOID Address)
|
||||
|
|
@ -343,7 +378,7 @@ MmGetPhysicalAddressForProcess(PEPROCESS Process,
|
|||
}
|
||||
return(PTE_TO_PAGE(PageEntry));
|
||||
}
|
||||
|
||||
#if 0
|
||||
VOID
|
||||
MmDisableVirtualMapping(PEPROCESS Process, PVOID Address, BOOL* WasDirty, PHYSICAL_ADDRESS* PhysicalAddr)
|
||||
/*
|
||||
|
|
@ -413,7 +448,7 @@ MmDisableVirtualMapping(PEPROCESS Process, PVOID Address, BOOL* WasDirty, PHYSIC
|
|||
PhysicalAddr->u.LowPart = PAGE_MASK(Pte);
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
VOID
|
||||
MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
|
||||
BOOL* WasDirty, PHYSICAL_ADDRESS* PhysicalAddr)
|
||||
|
|
@ -422,7 +457,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
|
|||
*/
|
||||
{
|
||||
ULONG Pte;
|
||||
PULONG Pde;
|
||||
PULONG Pde, kePde;
|
||||
PEPROCESS CurrentProcess = PsGetCurrentProcess();
|
||||
BOOLEAN WasValid;
|
||||
|
||||
|
|
@ -440,13 +475,17 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
|
|||
* the global page directory.
|
||||
*/
|
||||
Pde = ADDR_TO_PDE(Address);
|
||||
if ((*Pde) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
if ((*Pde) == 0)
|
||||
if (*Pde == 0 && Address >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(Address);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
}
|
||||
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (Process != NULL && Process != CurrentProcess)
|
||||
{
|
||||
|
|
@ -475,7 +514,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
|
|||
}
|
||||
if (FreePage && WasValid)
|
||||
{
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(Pte));
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(Pte));
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -483,7 +522,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
|
|||
*/
|
||||
if (Process != NULL && WasValid &&
|
||||
Process->AddressSpace.PageTableRefCountTable != NULL &&
|
||||
ADDR_TO_PAGE_TABLE(Address) < 768)
|
||||
Address < (PVOID)KERNEL_BASE)
|
||||
{
|
||||
PUSHORT Ptrc;
|
||||
|
||||
|
|
@ -532,7 +571,7 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
|
|||
*/
|
||||
{
|
||||
ULONG Pte;
|
||||
PULONG Pde;
|
||||
PULONG Pde, kePde;
|
||||
PEPROCESS CurrentProcess = PsGetCurrentProcess();
|
||||
BOOLEAN WasValid = FALSE;
|
||||
|
||||
|
|
@ -550,13 +589,19 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
|
|||
* the global page directory.
|
||||
*/
|
||||
Pde = ADDR_TO_PDE(Address);
|
||||
if ((*Pde) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
if ((*Pde) == 0)
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (Address >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(Address);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (Process != NULL && Process != CurrentProcess)
|
||||
{
|
||||
|
|
@ -572,12 +617,14 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
|
|||
Pte = (ULONG)InterlockedExchange((PLONG)ADDR_TO_PTE(Address), 0);
|
||||
FLUSH_TLB;
|
||||
|
||||
WasValid = PAGE_MASK(Pte) == 0 ? FALSE : TRUE;
|
||||
|
||||
/*
|
||||
* Decrement the reference count for this page table.
|
||||
*/
|
||||
if (Process != NULL && WasValid &&
|
||||
Process->AddressSpace.PageTableRefCountTable != NULL &&
|
||||
ADDR_TO_PAGE_TABLE(Address) < 768)
|
||||
Address < (PVOID)KERNEL_BASE)
|
||||
{
|
||||
PUSHORT Ptrc;
|
||||
|
||||
|
|
@ -607,63 +654,75 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
|
|||
BOOLEAN
|
||||
Mmi386MakeKernelPageTableGlobal(PVOID PAddress)
|
||||
{
|
||||
PULONG page_dir;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG kePde, Pde;
|
||||
|
||||
page_dir = ADDR_TO_PDE(Address);
|
||||
if ((*page_dir) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
return(TRUE);
|
||||
}
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
if (*Pde == 0)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
return(TRUE);
|
||||
}
|
||||
}
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
BOOLEAN MmIsPageTablePresent(PVOID PAddress)
|
||||
{
|
||||
PULONG page_dir;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG Pde, kePde;
|
||||
|
||||
page_dir = ADDR_TO_PDE(Address);
|
||||
if ((*page_dir) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
return((*page_dir) == 0);
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
if (*Pde == 0)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
NTSTATUS MmCreatePageTable(PVOID PAddress)
|
||||
{
|
||||
PULONG page_dir;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG Pde, kePde;
|
||||
PHYSICAL_ADDRESS npage;
|
||||
NTSTATUS Status;
|
||||
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", Address);
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
|
||||
|
||||
page_dir = ADDR_TO_PDE(Address);
|
||||
DPRINT("page_dir %x *page_dir %x\n",page_dir,*page_dir);
|
||||
if ((*page_dir) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
if ((*page_dir) == 0)
|
||||
{
|
||||
NTSTATUS Status;
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
return(Status);
|
||||
}
|
||||
(*page_dir) = npage.QuadPart | 0x7;
|
||||
memset((PVOID)PAGE_ROUND_DOWN(ADDR_TO_PTE(Address)), 0, PAGE_SIZE);
|
||||
FLUSH_TLB;
|
||||
}
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
DPRINT("page_dir %x *page_dir %x\n", Pde, *Pde);
|
||||
if (*Pde == 0 && PAddress >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
return STATUS_SUCCESS;
|
||||
}
|
||||
/* Should we create a kernel page table? */
|
||||
DPRINT1("!!!!!!!!!!!!!!!!!!\n");
|
||||
return STATUS_UNSUCCESSFUL;
|
||||
}
|
||||
|
||||
if (*Pde == 0)
|
||||
{
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
return(Status);
|
||||
}
|
||||
MiZeroPage(npage);
|
||||
*Pde = npage.u.LowPart | PA_PRESENT | PA_READWRITE | PA_USER;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
return(STATUS_SUCCESS);
|
||||
}
|
||||
|
||||
|
|
@ -672,36 +731,69 @@ PULONG MmGetPageEntry(PVOID PAddress)
|
|||
* FUNCTION: Get a pointer to the page table entry for a virtual address
|
||||
*/
|
||||
{
|
||||
PULONG page_tlb;
|
||||
PULONG page_dir;
|
||||
ULONG Address = (ULONG)PAddress;
|
||||
PULONG Pde, kePde;
|
||||
PHYSICAL_ADDRESS npage;
|
||||
KIRQL oldIrql;
|
||||
BOOLEAN Free = FALSE;
|
||||
NTSTATUS Status;
|
||||
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", Address);
|
||||
DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
|
||||
|
||||
page_dir = ADDR_TO_PDE(Address);
|
||||
DPRINT("page_dir %x *page_dir %x\n",page_dir,*page_dir);
|
||||
if ((*page_dir) == 0 &&
|
||||
MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
|
||||
{
|
||||
(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
|
||||
FLUSH_TLB;
|
||||
}
|
||||
if ((*page_dir) == 0)
|
||||
{
|
||||
NTSTATUS Status;
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
Pde = ADDR_TO_PDE(PAddress);
|
||||
DPRINT("page_dir %x *page_dir %x\n",Pde,*Pde);
|
||||
if (*Pde == 0)
|
||||
{
|
||||
if (PAddress >= (PVOID)KERNEL_BASE)
|
||||
{
|
||||
oldIrql = KeRaiseIrqlToSynchLevel();
|
||||
kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
|
||||
if (*kePde != 0)
|
||||
{
|
||||
KeBugCheck(0);
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
(*page_dir) = npage.QuadPart | 0x7;
|
||||
memset((PVOID)PAGE_ROUND_DOWN(ADDR_TO_PTE(Address)), 0, PAGE_SIZE);
|
||||
FLUSH_TLB;
|
||||
}
|
||||
page_tlb = ADDR_TO_PTE(Address);
|
||||
DPRINT("page_tlb %x\n",page_tlb);
|
||||
return(page_tlb);
|
||||
else
|
||||
{
|
||||
KeLowerIrql(oldIrql);
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
KeBugCheck(0);
|
||||
}
|
||||
MiZeroPage(npage);
|
||||
oldIrql = KeRaiseIrqlToSynchLevel();
|
||||
if (*kePde != 0)
|
||||
{
|
||||
*Pde = *kePde;
|
||||
FLUSH_TLB;
|
||||
Free = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
*Pde = *kePde = npage.u.LowPart | PA_PRESENT | PA_READWRITE;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
}
|
||||
KeLowerIrql(oldIrql);
|
||||
}
|
||||
else
|
||||
{
|
||||
Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
|
||||
if (!NT_SUCCESS(Status))
|
||||
{
|
||||
KeBugCheck(0);
|
||||
}
|
||||
MiZeroPage(npage);
|
||||
*Pde = npage.u.LowPart | PA_PRESENT | PA_READWRITE | PA_USER;
|
||||
FLUSH_TLB;
|
||||
}
|
||||
if (Free)
|
||||
{
|
||||
MmReleasePageMemoryConsumer(MC_NPPOOL, npage);
|
||||
}
|
||||
}
|
||||
|
||||
return ADDR_TO_PTE(PAddress);
|
||||
}
|
||||
|
||||
BOOLEAN MmIsDirtyPage(PEPROCESS Process, PVOID Address)
|
||||
|
|
@ -770,7 +862,7 @@ VOID MmSetDirtyPage(PEPROCESS Process, PVOID Address)
|
|||
KeDetachProcess();
|
||||
}
|
||||
}
|
||||
|
||||
#if 0
|
||||
VOID MmEnableVirtualMapping(PEPROCESS Process, PVOID Address)
|
||||
{
|
||||
PULONG PageEntry;
|
||||
|
|
@ -788,7 +880,7 @@ VOID MmEnableVirtualMapping(PEPROCESS Process, PVOID Address)
|
|||
KeDetachProcess();
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
BOOLEAN MmIsPagePresent(PEPROCESS Process, PVOID Address)
|
||||
{
|
||||
return((MmGetPageEntryForProcess1(Process, Address)) & PA_PRESENT);
|
||||
|
|
|
|||
Loading…
Reference in a new issue