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- Implement MmAddVerifierThunks, MmIsDriverVerifying, MmIsVerifierEnabled.
- Not used by anything, these are for 3rd-party drivers and Driver Verifier. svn path=/trunk/; revision=24732
This commit is contained in:
Alex Ionescu
parent
00418f00bf
commit
29a0679654
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@ -1,63 +1,190 @@
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/* $Id$
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/verifier.c
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* PURPOSE: Driver Verifier functions
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*
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* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
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*/
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/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/mm/verifier.c
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* PURPOSE: Mm Driver Verifier Routines
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES *****************************************************************/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <internal/debug.h>
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/* GLOBALS *******************************************************************/
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/* FUNCTIONS *****************************************************************/
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MM_DRIVER_VERIFIER_DATA MmVerifierData;
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LIST_ENTRY MiVerifierDriverAddedThunkListHead;
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KMUTANT MmSystemLoadLock;
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ULONG MiActiveVerifierThunks;
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extern LIST_ENTRY ModuleListHead;
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/*
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* @unimplemented
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*/
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NTSTATUS
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STDCALL
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MmAddVerifierThunks (
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IN PVOID ThunkBuffer,
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IN ULONG ThunkBufferSize
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)
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/* PRIVATE FUNCTIONS *********************************************************/
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PLDR_DATA_TABLE_ENTRY
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NTAPI
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MiLookupDataTableEntry(IN PVOID Address)
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{
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UNIMPLEMENTED;
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return STATUS_NOT_IMPLEMENTED;
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PLDR_DATA_TABLE_ENTRY LdrEntry, FoundEntry = NULL;
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PLIST_ENTRY NextEntry;
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PAGED_CODE();
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/* Loop entries */
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NextEntry = ModuleListHead.Flink;
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do
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{
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/* Get the loader entry */
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LdrEntry = CONTAINING_RECORD(NextEntry,
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LDR_DATA_TABLE_ENTRY,
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InLoadOrderLinks);
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/* Check if the address matches */
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if ((Address >= LdrEntry->DllBase) &&
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(Address < (PVOID)((ULONG_PTR)LdrEntry->DllBase + LdrEntry->SizeOfImage)))
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{
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/* Found a match */
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FoundEntry = LdrEntry;
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break;
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}
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/* Move on */
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NextEntry = NextEntry->Flink;
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} while(NextEntry != &ModuleListHead);
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/* Return the entry */
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return FoundEntry;
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}
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/* PUBLIC FUNCTIONS **********************************************************/
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/*
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* @unimplemented
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*/
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ULONG
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STDCALL
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MmIsDriverVerifying (
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IN struct _DRIVER_OBJECT *DriverObject
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)
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{
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UNIMPLEMENTED;
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return 0;
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}
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/*
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* @unimplemented
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* @implemented
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*/
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NTSTATUS
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STDCALL
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MmIsVerifierEnabled (
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OUT PULONG VerifierFlags
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)
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NTAPI
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MmAddVerifierThunks(IN PVOID ThunkBuffer,
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IN ULONG ThunkBufferSize)
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{
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UNIMPLEMENTED;
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return STATUS_NOT_IMPLEMENTED;
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PDRIVER_VERIFIER_THUNK_PAIRS ThunkPairs, DriverThunkTable;
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ULONG ThunkCount;
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PDRIVER_SPECIFIED_VERIFIER_THUNKS ThunkTable;
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PLDR_DATA_TABLE_ENTRY LdrEntry;
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PVOID ModuleBase, ModuleEnd;
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ULONG i;
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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/* Make sure the driver verifier is initialized */
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if (!MiVerifierDriverAddedThunkListHead.Flink) return STATUS_NOT_SUPPORTED;
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/* Get the thunk pairs and count them */
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ThunkPairs = (PDRIVER_VERIFIER_THUNK_PAIRS)ThunkBuffer;
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ThunkCount = ThunkBufferSize / sizeof(DRIVER_VERIFIER_THUNK_PAIRS);
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if (!ThunkCount) return STATUS_INVALID_PARAMETER_1;
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/* Now allocate our own thunk table */
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ThunkTable = ExAllocatePoolWithTag(PagedPool,
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sizeof(DRIVER_SPECIFIED_VERIFIER_THUNKS) +
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ThunkCount *
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sizeof(DRIVER_VERIFIER_THUNK_PAIRS),
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TAG('M', 'm', 'V', 't'));
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if (!ThunkTable) return STATUS_INSUFFICIENT_RESOURCES;
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/* Now copy the driver-fed part */
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DriverThunkTable = (PDRIVER_VERIFIER_THUNK_PAIRS)(ThunkTable + 1);
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RtlCopyMemory(DriverThunkTable,
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ThunkPairs,
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ThunkCount * sizeof(DRIVER_VERIFIER_THUNK_PAIRS));
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/* Acquire the system load lock */
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KeEnterCriticalRegion();
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KeWaitForSingleObject(&MmSystemLoadLock,
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WrVirtualMemory,
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KernelMode,
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FALSE,
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NULL);
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/* Get the loader entry */
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LdrEntry = MiLookupDataTableEntry(DriverThunkTable->PristineRoutine);
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if (!LdrEntry)
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{
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/* Fail */
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Status = STATUS_INVALID_PARAMETER_2;
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goto Cleanup;
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}
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/* Get driver base and end */
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ModuleBase = LdrEntry->DllBase;
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ModuleEnd = (PVOID)((ULONG_PTR)LdrEntry->DllBase + LdrEntry->SizeOfImage);
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/* Loop all the thunks */
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for (i = 0; i < ThunkCount; i++)
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{
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/* Make sure it's in the driver */
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if (((ULONG_PTR)DriverThunkTable->PristineRoutine < (ULONG_PTR)ModuleBase) ||
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((ULONG_PTR)DriverThunkTable->PristineRoutine >= (ULONG_PTR)ModuleEnd))
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{
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/* Nope, fail */
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Status = STATUS_INVALID_PARAMETER_2;
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goto Cleanup;
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}
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}
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/* Otherwise, add this entry */
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ThunkTable->DataTableEntry = LdrEntry;
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ThunkTable->NumberOfThunks = ThunkCount;
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MiActiveVerifierThunks++;
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InsertTailList(&MiVerifierDriverAddedThunkListHead,
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&ThunkTable->ListEntry);
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ThunkTable = NULL;
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Cleanup:
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/* Release the lock */
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KeReleaseMutant(&MmSystemLoadLock, 1, FALSE, FALSE);
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KeLeaveCriticalRegion();
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/* Free the table if we failed and return status */
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ExFreePool(ThunkTable);
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return Status;
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}
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/*
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* @implemented
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*/
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LOGICAL
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NTAPI
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MmIsDriverVerifying(IN PDRIVER_OBJECT DriverObject)
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{
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PLDR_DATA_TABLE_ENTRY LdrEntry;
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/* Get the loader entry */
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LdrEntry = (PLDR_DATA_TABLE_ENTRY)DriverObject->DriverSection;
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if (!LdrEntry) return FALSE;
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/* Check if we're verifying or not */
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return (LdrEntry->Flags & LDRP_DRIVER_VERIFYING) ? TRUE: FALSE;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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MmIsVerifierEnabled(OUT PULONG VerifierFlags)
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{
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/* Check if we've actually added anything to the list */
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if (MiVerifierDriverAddedThunkListHead.Flink)
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{
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/* We have, read the verifier level */
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*VerifierFlags = MmVerifierData.Level;
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return STATUS_SUCCESS;
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}
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/* Otherwise, we're disabled */
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*VerifierFlags = 0;
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return STATUS_NOT_SUPPORTED;
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}
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/* EOF */
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