mirror of
https://github.com/reactos/reactos.git
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* 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
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: page.c,v 1.45 2002/10/01 19:27:25 chorns Exp $
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/* $Id: page.c,v 1.46 2002/11/05 20:39:03 hbirr Exp $
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*
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/i386/page.c
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@ -161,7 +161,7 @@ NTSTATUS MmCopyMmInfo(PEPROCESS Src, PEPROCESS Dest)
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}
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DPRINT("Addr %x\n",PAGETABLE_MAP / (4*1024*1024));
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PageDirectory[PAGETABLE_MAP / (4*1024*1024)] =
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(ULONG)PhysPageDirectory.QuadPart | 0x7;
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PhysPageDirectory.u.LowPart | PA_PRESENT | PA_READWRITE;
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ExUnmapPage(PageDirectory);
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@ -180,7 +180,8 @@ VOID MmDeletePageTable(PEPROCESS Process, PVOID Address)
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*(ADDR_TO_PDE(Address)) = 0;
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if (Address >= (PVOID)KERNEL_BASE)
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{
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
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KeBugCheck(0);
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// MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
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}
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FLUSH_TLB;
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if (Process != NULL && Process != CurrentProcess)
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@ -197,31 +198,37 @@ VOID MmFreePageTable(PEPROCESS Process, PVOID Address)
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ULONG npage;
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if (Process != NULL && Process != CurrentProcess)
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{
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KeAttachProcess(Process);
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}
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{
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KeAttachProcess(Process);
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}
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PageTable = (PULONG)PAGE_ROUND_DOWN((PVOID)ADDR_TO_PTE(Address));
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for (i = 0; i < 1024; i++)
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{
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if (PageTable[i] != 0)
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{
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DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
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((ULONG)Address / 4*1024*1024), i, PageTable[i]);
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KeBugCheck(0);
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}
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}
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{
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if (PageTable[i] != 0)
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{
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DbgPrint("Page table entry not clear at %x/%x (is %x)\n",
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((ULONG)Address / 4*1024*1024), i, PageTable[i]);
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KeBugCheck(0);
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}
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}
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npage = *(ADDR_TO_PDE(Address));
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*(ADDR_TO_PDE(Address)) = 0;
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if (Address >= (PVOID)KERNEL_BASE)
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{
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
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}
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MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(npage));
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FLUSH_TLB;
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if (Address >= (PVOID)KERNEL_BASE)
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{
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// MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] = 0;
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KeBugCheck(0);
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}
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else
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(npage));
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}
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if (Process != NULL && Process != CurrentProcess)
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{
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KeDetachProcess();
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}
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{
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KeDetachProcess();
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}
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}
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NTSTATUS MmGetPageEntry2(PVOID PAddress, PULONG* Pte, BOOLEAN MayWait)
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@ -229,41 +236,66 @@ NTSTATUS MmGetPageEntry2(PVOID PAddress, PULONG* Pte, BOOLEAN MayWait)
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* FUNCTION: Get a pointer to the page table entry for a virtual address
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*/
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{
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PULONG Pde;
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ULONG Address = (ULONG)PAddress;
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PULONG Pde, kePde;
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PHYSICAL_ADDRESS npage;
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BOOLEAN Free = FALSE;
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NTSTATUS Status;
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KIRQL oldIrql;
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DPRINT("MmGetPageEntry(Address %x)\n", Address);
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DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
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Pde = ADDR_TO_PDE(Address);
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if ((*Pde) == 0)
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{
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if (Address >= KERNEL_BASE &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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Pde = ADDR_TO_PDE(PAddress);
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if (*Pde == 0)
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{
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if (PAddress >= (PVOID)KERNEL_BASE)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
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oldIrql = KeRaiseIrqlToSynchLevel();
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if (*kePde != 0)
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{
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(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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*Pde = *kePde;
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FLUSH_TLB;
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}
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else
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else
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{
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NTSTATUS Status;
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
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if (!NT_SUCCESS(Status))
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{
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return(Status);
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}
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(*Pde) = npage.QuadPart | 0x7;
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if (Address >= KERNEL_BASE)
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{
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] =
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*Pde;
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}
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memset((PVOID)PAGE_ROUND_DOWN(ADDR_TO_PTE(Address)), 0, PAGE_SIZE);
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FLUSH_TLB;
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KeLowerIrql(oldIrql);
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
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if (!NT_SUCCESS(Status))
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{
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KeBugCheck(0);
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}
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oldIrql = KeRaiseIrqlToSynchLevel();
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/* An other thread can set this pde entry, we must check again */
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if (*kePde == 0)
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{
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*kePde = npage.u.LowPart | PA_PRESENT | PA_READWRITE;
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}
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else
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{
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Free = TRUE;
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}
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*Pde = *kePde;
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FLUSH_TLB;
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}
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}
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*Pte = ADDR_TO_PTE(Address);
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return(STATUS_SUCCESS);
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KeLowerIrql(oldIrql);
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}
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else
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{
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, MayWait, &npage);
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if (!NT_SUCCESS(Status))
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{
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return(Status);
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}
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*Pde = npage.u.LowPart | PA_PRESENT | PA_READWRITE | PA_USER;
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FLUSH_TLB;
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}
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}
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*Pte = (PULONG)ADDR_TO_PTE(PAddress);
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if (Free)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, npage);
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}
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return STATUS_SUCCESS;
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}
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ULONG MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
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@ -288,27 +320,30 @@ ULONG MmGetPageEntry1(PVOID PAddress)
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* FUNCTION: Get a pointer to the page table entry for a virtual address
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*/
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{
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PULONG page_tlb;
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PULONG page_dir;
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ULONG Address = (ULONG)PAddress;
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PULONG Pde, kePde;
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ULONG Entry = 0;
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DPRINT("MmGetPageEntry(Address %x)\n", Address);
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DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
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page_dir = ADDR_TO_PDE(Address);
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if ((*page_dir) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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}
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DPRINT("page_dir %x *page_dir %x\n",page_dir,*page_dir);
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if ((*page_dir) == 0)
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{
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return(0);
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}
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page_tlb = ADDR_TO_PTE(Address);
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DPRINT("page_tlb %x\n",page_tlb);
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return(*page_tlb);
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Pde = ADDR_TO_PDE(PAddress);
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if (*Pde == 0)
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{
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if (PAddress >= (PVOID)KERNEL_BASE)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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Entry = *(PULONG)ADDR_TO_PTE(PAddress);
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}
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}
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}
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else
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{
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Entry = *(PULONG)ADDR_TO_PTE(PAddress);
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}
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return Entry;
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}
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ULONG MmGetPageEntryForProcess1(PEPROCESS Process, PVOID Address)
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@ -343,7 +378,7 @@ MmGetPhysicalAddressForProcess(PEPROCESS Process,
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}
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return(PTE_TO_PAGE(PageEntry));
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}
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#if 0
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VOID
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MmDisableVirtualMapping(PEPROCESS Process, PVOID Address, BOOL* WasDirty, PHYSICAL_ADDRESS* PhysicalAddr)
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/*
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@ -413,7 +448,7 @@ MmDisableVirtualMapping(PEPROCESS Process, PVOID Address, BOOL* WasDirty, PHYSIC
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PhysicalAddr->u.LowPart = PAGE_MASK(Pte);
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}
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}
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#endif
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VOID
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MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
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BOOL* WasDirty, PHYSICAL_ADDRESS* PhysicalAddr)
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@ -422,7 +457,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
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*/
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{
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ULONG Pte;
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PULONG Pde;
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PULONG Pde, kePde;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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BOOLEAN WasValid;
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@ -440,13 +475,17 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
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* the global page directory.
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*/
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Pde = ADDR_TO_PDE(Address);
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if ((*Pde) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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}
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if ((*Pde) == 0)
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if (*Pde == 0 && Address >= (PVOID)KERNEL_BASE)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(Address);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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}
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}
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if (*Pde == 0)
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{
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if (Process != NULL && Process != CurrentProcess)
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{
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@ -475,7 +514,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
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}
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if (FreePage && WasValid)
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{
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MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(Pte));
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MmReleasePageMemoryConsumer(MC_NPPOOL, PTE_TO_PAGE(Pte));
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}
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/*
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@ -483,7 +522,7 @@ MmDeleteVirtualMapping(PEPROCESS Process, PVOID Address, BOOL FreePage,
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*/
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if (Process != NULL && WasValid &&
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Process->AddressSpace.PageTableRefCountTable != NULL &&
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ADDR_TO_PAGE_TABLE(Address) < 768)
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Address < (PVOID)KERNEL_BASE)
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{
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PUSHORT Ptrc;
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@ -532,7 +571,7 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
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*/
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{
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ULONG Pte;
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PULONG Pde;
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PULONG Pde, kePde;
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PEPROCESS CurrentProcess = PsGetCurrentProcess();
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BOOLEAN WasValid = FALSE;
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@ -550,13 +589,19 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
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* the global page directory.
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*/
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Pde = ADDR_TO_PDE(Address);
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if ((*Pde) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*Pde) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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}
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if ((*Pde) == 0)
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if (*Pde == 0)
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{
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if (Address >= (PVOID)KERNEL_BASE)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(Address);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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}
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}
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}
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if (*Pde == 0)
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{
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if (Process != NULL && Process != CurrentProcess)
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{
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@ -572,12 +617,14 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
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Pte = (ULONG)InterlockedExchange((PLONG)ADDR_TO_PTE(Address), 0);
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FLUSH_TLB;
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WasValid = PAGE_MASK(Pte) == 0 ? FALSE : TRUE;
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/*
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* Decrement the reference count for this page table.
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*/
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if (Process != NULL && WasValid &&
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Process->AddressSpace.PageTableRefCountTable != NULL &&
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ADDR_TO_PAGE_TABLE(Address) < 768)
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Address < (PVOID)KERNEL_BASE)
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{
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PUSHORT Ptrc;
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@ -607,63 +654,75 @@ MmDeletePageFileMapping(PEPROCESS Process, PVOID Address,
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BOOLEAN
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Mmi386MakeKernelPageTableGlobal(PVOID PAddress)
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{
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PULONG page_dir;
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ULONG Address = (ULONG)PAddress;
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PULONG kePde, Pde;
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page_dir = ADDR_TO_PDE(Address);
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if ((*page_dir) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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return(TRUE);
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}
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Pde = ADDR_TO_PDE(PAddress);
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if (*Pde == 0)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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return(TRUE);
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}
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}
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return(FALSE);
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}
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BOOLEAN MmIsPageTablePresent(PVOID PAddress)
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{
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PULONG page_dir;
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ULONG Address = (ULONG)PAddress;
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PULONG Pde, kePde;
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page_dir = ADDR_TO_PDE(Address);
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if ((*page_dir) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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}
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return((*page_dir) == 0);
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Pde = ADDR_TO_PDE(PAddress);
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if (*Pde == 0)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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return TRUE;
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}
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}
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return FALSE;
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}
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NTSTATUS MmCreatePageTable(PVOID PAddress)
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{
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PULONG page_dir;
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ULONG Address = (ULONG)PAddress;
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PULONG Pde, kePde;
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PHYSICAL_ADDRESS npage;
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NTSTATUS Status;
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DPRINT("MmGetPageEntry(Address %x)\n", Address);
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DPRINT("MmGetPageEntry(Address %x)\n", PAddress);
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page_dir = ADDR_TO_PDE(Address);
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DPRINT("page_dir %x *page_dir %x\n",page_dir,*page_dir);
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if ((*page_dir) == 0 &&
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MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)] != 0)
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{
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(*page_dir) = MmGlobalKernelPageDirectory[ADDR_TO_PDE_OFFSET(Address)];
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FLUSH_TLB;
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}
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if ((*page_dir) == 0)
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{
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NTSTATUS Status;
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Status = MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &npage);
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if (!NT_SUCCESS(Status))
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{
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return(Status);
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}
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(*page_dir) = npage.QuadPart | 0x7;
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memset((PVOID)PAGE_ROUND_DOWN(ADDR_TO_PTE(Address)), 0, PAGE_SIZE);
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FLUSH_TLB;
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}
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Pde = ADDR_TO_PDE(PAddress);
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DPRINT("page_dir %x *page_dir %x\n", Pde, *Pde);
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if (*Pde == 0 && PAddress >= (PVOID)KERNEL_BASE)
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{
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kePde = MmGlobalKernelPageDirectory + ADDR_TO_PDE_OFFSET(PAddress);
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if (*kePde != 0)
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{
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*Pde = *kePde;
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FLUSH_TLB;
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return STATUS_SUCCESS;
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}
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/* Should we create a kernel page table? */
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||||
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