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[NTOSKRNL]
Implement MiLockVirtualMemory / MiUnlockVirtualMemory. Due to missing WS list support, hack the WS list entries into the PFN, until we support WS lists. svn path=/trunk/; revision=62051
This commit is contained in:
Timo Kreuzer
parent
35a81cf970
commit
2972d3179b
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@ -391,6 +391,9 @@ typedef struct _MMPFN
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MI_PFN_USAGES PfnUsage;
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CHAR ProcessName[16];
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#endif
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// HACK until WS lists are supported
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MMWSLE Wsle;
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} MMPFN, *PMMPFN;
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extern PMMPFN MmPfnDatabase;
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@ -2859,6 +2859,258 @@ NtProtectVirtualMemory(IN HANDLE ProcessHandle,
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return Status;
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}
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FORCEINLINE
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BOOLEAN
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MI_IS_LOCKED_VA(
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PMMPFN Pfn1,
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ULONG LockType)
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{
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// HACK until we have proper WSLIST support
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PMMWSLE Wsle = &Pfn1->Wsle;
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if ((LockType & MAP_PROCESS) && (Wsle->u1.e1.LockedInWs))
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return TRUE;
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if ((LockType & MAP_SYSTEM) && (Wsle->u1.e1.LockedInMemory))
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return TRUE;
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return FALSE;
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}
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FORCEINLINE
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VOID
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MI_LOCK_VA(
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PMMPFN Pfn1,
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ULONG LockType)
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{
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// HACK until we have proper WSLIST support
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PMMWSLE Wsle = &Pfn1->Wsle;
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if (!Wsle->u1.e1.LockedInWs &&
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!Wsle->u1.e1.LockedInMemory)
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{
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MiReferenceProbedPageAndBumpLockCount(Pfn1);
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}
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if (LockType & MAP_PROCESS)
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Wsle->u1.e1.LockedInWs = 1;
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if (LockType & MAP_SYSTEM)
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Wsle->u1.e1.LockedInMemory = 1;
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}
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FORCEINLINE
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VOID
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MI_UNLOCK_VA(
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PMMPFN Pfn1,
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ULONG LockType)
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{
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// HACK until we have proper WSLIST support
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PMMWSLE Wsle = &Pfn1->Wsle;
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if (LockType & MAP_PROCESS)
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Wsle->u1.e1.LockedInWs = 0;
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if (LockType & MAP_SYSTEM)
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Wsle->u1.e1.LockedInMemory = 0;
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if (!Wsle->u1.e1.LockedInWs &&
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!Wsle->u1.e1.LockedInMemory)
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{
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MiDereferencePfnAndDropLockCount(Pfn1);
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}
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}
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static
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NTSTATUS
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MiCheckVadsForLockOperation(
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_Inout_ PVOID *BaseAddress,
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_Inout_ PSIZE_T RegionSize,
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_Inout_ PVOID *EndAddress)
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{
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PMMVAD Vad;
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PVOID CurrentVa;
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/* Get the base address and align the start address */
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*EndAddress = (PUCHAR)*BaseAddress + *RegionSize;
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*EndAddress = ALIGN_UP_POINTER_BY(*EndAddress, PAGE_SIZE);
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*BaseAddress = ALIGN_DOWN_POINTER_BY(*BaseAddress, PAGE_SIZE);
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/* First loop and check all VADs */
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CurrentVa = *BaseAddress;
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while (CurrentVa < *EndAddress)
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{
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/* Get VAD */
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Vad = MiLocateAddress(CurrentVa);
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if (Vad == NULL)
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{
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/// FIXME: this might be a memory area for a section view...
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return STATUS_ACCESS_VIOLATION;
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}
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/* Check VAD type */
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if ((Vad->u.VadFlags.VadType != VadNone) &&
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(Vad->u.VadFlags.VadType != VadImageMap) &&
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(Vad->u.VadFlags.VadType != VadWriteWatch))
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{
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*EndAddress = CurrentVa;
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*RegionSize = (PUCHAR)*EndAddress - (PUCHAR)*BaseAddress;
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return STATUS_INCOMPATIBLE_FILE_MAP;
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}
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CurrentVa = (PVOID)((Vad->EndingVpn + 1) << PAGE_SHIFT);
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}
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*RegionSize = (PUCHAR)*EndAddress - (PUCHAR)*BaseAddress;
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return STATUS_SUCCESS;
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}
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static
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NTSTATUS
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MiLockVirtualMemory(
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IN OUT PVOID *BaseAddress,
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IN OUT PSIZE_T RegionSize,
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IN ULONG MapType)
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{
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PEPROCESS CurrentProcess;
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PMMSUPPORT AddressSpace;
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PVOID CurrentVa, EndAddress;
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PMMPTE PointerPte, LastPte;
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PMMPDE PointerPde;
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#if (_MI_PAGING_LEVELS >= 3)
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PMMPDE PointerPpe;
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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PMMPDE PointerPxe;
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#endif
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PMMPFN Pfn1;
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NTSTATUS Status, TempStatus;
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/* Lock the address space */
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AddressSpace = MmGetCurrentAddressSpace();
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MmLockAddressSpace(AddressSpace);
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/* Make sure we still have an address space */
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CurrentProcess = PsGetCurrentProcess();
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if (CurrentProcess->VmDeleted)
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{
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Status = STATUS_PROCESS_IS_TERMINATING;
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goto Cleanup;
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}
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/* Check the VADs in the requested range */
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Status = MiCheckVadsForLockOperation(BaseAddress, RegionSize, &EndAddress);
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if (!NT_SUCCESS(Status))
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{
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goto Cleanup;
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}
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/* Enter SEH for probing */
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_SEH2_TRY
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{
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/* Loop all pages and probe them */
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CurrentVa = *BaseAddress;
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while (CurrentVa < EndAddress)
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{
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(void)(*(volatile CHAR*)CurrentVa);
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CurrentVa = (PUCHAR)CurrentVa + PAGE_SIZE;
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}
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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Status = _SEH2_GetExceptionCode();
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goto Cleanup;
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}
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_SEH2_END;
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/* All pages were accessible, since we hold the address space lock, nothing
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can be de-committed. Assume success for now. */
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Status = STATUS_SUCCESS;
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/* Get the PTE and PDE */
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PointerPte = MiAddressToPte(*BaseAddress);
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PointerPde = MiAddressToPde(*BaseAddress);
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#if (_MI_PAGING_LEVELS >= 3)
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PointerPpe = MiAddressToPpe(*BaseAddress);
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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PointerPxe = MiAddressToPxe(*BaseAddress);
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#endif
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/* Get the last PTE */
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LastPte = MiAddressToPte((PVOID)((ULONG_PTR)EndAddress - 1));
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/* Lock the process working set */
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MiLockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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/* Loop the pages */
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do
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{
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/* Check for a page that is not accessible */
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while (
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#if (_MI_PAGING_LEVELS == 4)
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(PointerPxe->u.Hard.Valid == 0) ||
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#endif
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#if (_MI_PAGING_LEVELS >= 3)
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(PointerPpe->u.Hard.Valid == 0) ||
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#endif
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(PointerPde->u.Hard.Valid == 0) ||
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(PointerPte->u.Hard.Valid == 0))
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{
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/* Release process working set */
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MiUnlockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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/* Access the page */
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CurrentVa = MiPteToAddress(PointerPte);
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//HACK: Pass a placeholder TrapInformation so the fault handler knows we're unlocked
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TempStatus = MmAccessFault(TRUE, CurrentVa, KernelMode, (PVOID)0xBADBADA3);
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if (!NT_SUCCESS(TempStatus))
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{
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// This should only happen, when remote backing storage is not accessible
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ASSERT(FALSE);
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Status = TempStatus;
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goto Cleanup;
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}
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/* Lock the process working set */
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MiLockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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}
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/* Get the PFN */
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Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(PointerPte));
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ASSERT(Pfn1 != NULL);
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/* Check the previous lock status */
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if (MI_IS_LOCKED_VA(Pfn1, MapType))
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{
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Status = STATUS_WAS_LOCKED;
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}
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/* Lock it */
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MI_LOCK_VA(Pfn1, MapType);
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/* Go to the next PTE */
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PointerPte++;
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/* Check if we're on a PDE boundary */
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if (MiIsPteOnPdeBoundary(PointerPte)) PointerPde++;
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#if (_MI_PAGING_LEVELS >= 3)
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if (MiIsPteOnPpeBoundary(PointerPte)) PointerPpe++;
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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if (MiIsPteOnPxeBoundary(PointerPte)) PointerPxe++;
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#endif
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} while (PointerPte <= LastPte);
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/* Release process working set */
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MiUnlockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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Cleanup:
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/* Unlock address space */
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MmUnlockAddressSpace(AddressSpace);
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return Status;
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}
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NTSTATUS
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NTAPI
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NtLockVirtualMemory(IN HANDLE ProcessHandle,
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@ -2987,9 +3239,11 @@ NtLockVirtualMemory(IN HANDLE ProcessHandle,
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}
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//
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// Oops :(
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// Call the internal function
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//
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UNIMPLEMENTED;
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Status = MiLockVirtualMemory(&CapturedBaseAddress,
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&CapturedBytesToLock,
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MapType);
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//
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// Detach if needed
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@ -3010,7 +3264,7 @@ NtLockVirtualMemory(IN HANDLE ProcessHandle,
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// Return data to user
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//
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*BaseAddress = CapturedBaseAddress;
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*NumberOfBytesToLock = 0;
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*NumberOfBytesToLock = CapturedBytesToLock;
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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@ -3024,9 +3278,175 @@ NtLockVirtualMemory(IN HANDLE ProcessHandle,
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//
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// Return status
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//
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return STATUS_SUCCESS;
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return Status;
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}
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static
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NTSTATUS
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MiUnlockVirtualMemory(
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IN OUT PVOID *BaseAddress,
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IN OUT PSIZE_T RegionSize,
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IN ULONG MapType)
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{
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PEPROCESS CurrentProcess;
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PMMSUPPORT AddressSpace;
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PVOID EndAddress;
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PMMPTE PointerPte, LastPte;
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PMMPDE PointerPde;
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#if (_MI_PAGING_LEVELS >= 3)
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PMMPDE PointerPpe;
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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PMMPDE PointerPxe;
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#endif
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PMMPFN Pfn1;
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NTSTATUS Status;
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/* Lock the address space */
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AddressSpace = MmGetCurrentAddressSpace();
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MmLockAddressSpace(AddressSpace);
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/* Make sure we still have an address space */
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CurrentProcess = PsGetCurrentProcess();
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if (CurrentProcess->VmDeleted)
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{
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Status = STATUS_PROCESS_IS_TERMINATING;
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goto Cleanup;
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}
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/* Check the VADs in the requested range */
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Status = MiCheckVadsForLockOperation(BaseAddress, RegionSize, &EndAddress);
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/* Note: only bail out, if we hit an area without a VAD. If we hit an
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incompatible VAD we continue, like Windows does */
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if (Status == STATUS_ACCESS_VIOLATION)
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{
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Status = STATUS_NOT_LOCKED;
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goto Cleanup;
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}
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/* Get the PTE and PDE */
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PointerPte = MiAddressToPte(*BaseAddress);
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PointerPde = MiAddressToPde(*BaseAddress);
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#if (_MI_PAGING_LEVELS >= 3)
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PointerPpe = MiAddressToPpe(*BaseAddress);
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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PointerPxe = MiAddressToPxe(*BaseAddress);
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#endif
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/* Get the last PTE */
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LastPte = MiAddressToPte((PVOID)((ULONG_PTR)EndAddress - 1));
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/* Lock the process working set */
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MiLockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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/* Loop the pages */
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do
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{
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/* Check for a page that is not present */
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if (
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#if (_MI_PAGING_LEVELS == 4)
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(PointerPxe->u.Hard.Valid == 0) ||
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#endif
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#if (_MI_PAGING_LEVELS >= 3)
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(PointerPpe->u.Hard.Valid == 0) ||
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#endif
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(PointerPde->u.Hard.Valid == 0) ||
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(PointerPte->u.Hard.Valid == 0))
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{
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/* Remember it, but keep going */
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Status = STATUS_NOT_LOCKED;
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}
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else
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{
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/* Get the PFN */
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Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(PointerPte));
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ASSERT(Pfn1 != NULL);
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/* Check if all of the requested locks are present */
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if (((MapType & MAP_SYSTEM) && !MI_IS_LOCKED_VA(Pfn1, MAP_SYSTEM)) ||
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((MapType & MAP_PROCESS) && !MI_IS_LOCKED_VA(Pfn1, MAP_PROCESS)))
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{
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/* Remember it, but keep going */
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Status = STATUS_NOT_LOCKED;
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/* Check if no lock is present */
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if (!MI_IS_LOCKED_VA(Pfn1, MAP_PROCESS | MAP_SYSTEM))
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{
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DPRINT1("FIXME: Should remove the page from WS\n");
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}
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}
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}
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/* Go to the next PTE */
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PointerPte++;
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/* Check if we're on a PDE boundary */
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if (MiIsPteOnPdeBoundary(PointerPte)) PointerPde++;
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#if (_MI_PAGING_LEVELS >= 3)
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if (MiIsPteOnPpeBoundary(PointerPte)) PointerPpe++;
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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if (MiIsPteOnPxeBoundary(PointerPte)) PointerPxe++;
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#endif
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} while (PointerPte <= LastPte);
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/* Check if we hit a page that was not locked */
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if (Status == STATUS_NOT_LOCKED)
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{
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goto CleanupWithWsLock;
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}
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/* All pages in the region were locked, so unlock them all */
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/* Get the PTE and PDE */
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PointerPte = MiAddressToPte(*BaseAddress);
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PointerPde = MiAddressToPde(*BaseAddress);
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#if (_MI_PAGING_LEVELS >= 3)
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PointerPpe = MiAddressToPpe(*BaseAddress);
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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PointerPxe = MiAddressToPxe(*BaseAddress);
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#endif
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/* Loop the pages */
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do
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{
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/* Unlock it */
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Pfn1 = MiGetPfnEntry(PFN_FROM_PTE(PointerPte));
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MI_UNLOCK_VA(Pfn1, MapType);
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/* Go to the next PTE */
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PointerPte++;
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/* Check if we're on a PDE boundary */
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if (MiIsPteOnPdeBoundary(PointerPte)) PointerPde++;
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#if (_MI_PAGING_LEVELS >= 3)
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if (MiIsPteOnPpeBoundary(PointerPte)) PointerPpe++;
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#endif
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#if (_MI_PAGING_LEVELS == 4)
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if (MiIsPteOnPxeBoundary(PointerPte)) PointerPxe++;
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#endif
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} while (PointerPte <= LastPte);
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/* Everything is done */
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Status = STATUS_SUCCESS;
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CleanupWithWsLock:
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/* Release process working set */
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MiUnlockProcessWorkingSet(CurrentProcess, PsGetCurrentThread());
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Cleanup:
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/* Unlock address space */
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MmUnlockAddressSpace(AddressSpace);
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return Status;
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}
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NTSTATUS
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NTAPI
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NtUnlockVirtualMemory(IN HANDLE ProcessHandle,
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|
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@ -3155,9 +3575,11 @@ NtUnlockVirtualMemory(IN HANDLE ProcessHandle,
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}
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//
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// Oops :(
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// Call the internal function
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//
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UNIMPLEMENTED;
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Status = MiUnlockVirtualMemory(&CapturedBaseAddress,
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&CapturedBytesToUnlock,
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MapType);
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//
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// Detach if needed
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@ -3177,8 +3599,8 @@ NtUnlockVirtualMemory(IN HANDLE ProcessHandle,
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//
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// Return data to user
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//
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*BaseAddress = PAGE_ALIGN(CapturedBaseAddress);
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*NumberOfBytesToUnlock = 0;
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*BaseAddress = CapturedBaseAddress;
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*NumberOfBytesToUnlock = CapturedBytesToUnlock;
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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@ -4414,7 +4836,7 @@ NtFreeVirtualMemory(IN HANDLE ProcessHandle,
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PMEMORY_AREA MemoryArea;
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SIZE_T PRegionSize;
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PVOID PBaseAddress;
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ULONG_PTR CommitReduction = 0;
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LONG_PTR CommitReduction = 0;
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ULONG_PTR StartingAddress, EndingAddress;
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PMMVAD Vad;
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NTSTATUS Status;
|
||||
|
|
|
|||
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Reference in a new issue