[ros-diffs] [ion] 24732: - Implement MmAddVerifierThunks, MmIsDriverVerifying, MmIsVerifierEnabled. - Not used by anything, these are for 3rd-party drivers and Driver Verifier.

Author: ion
Date: Mon Nov 13 01:34:28 2006
New Revision: 24732

URL: http://svn.reactos.org/svn/reactos?rev=24732&view=rev
Log:
- Implement MmAddVerifierThunks, MmIsDriverVerifying, MmIsVerifierEnabled.
- Not used by anything, these are for 3rd-party drivers and Driver Verifier.

Modified:
    trunk/reactos/ntoskrnl/mm/verifier.c

Modified: trunk/reactos/ntoskrnl/mm/verifier.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/verifier.c?rev…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/verifier.c (original)
+++ trunk/reactos/ntoskrnl/mm/verifier.c Mon Nov 13 01:34:28 2006
@@ -1,63 +1,190 @@
-/* $Id$
- *
- * COPYRIGHT:       See COPYING in the top level directory
- * PROJECT:         ReactOS kernel
- * FILE:            ntoskrnl/mm/verifier.c
- * PURPOSE:         Driver Verifier functions
- *
- * PROGRAMMERS:     Alex Ionescu (alex(a)relsoft.net)
- */
+/*
+* PROJECT:         ReactOS Kernel
+* LICENSE:         GPL - See COPYING in the top level directory
+* FILE:            ntoskrnl/mm/verifier.c
+* PURPOSE:         Mm Driver Verifier Routines
+* PROGRAMMERS:     Alex Ionescu (alex.ionescu(a)reactos.org)
+*/
 
-/* INCLUDES *****************************************************************/
+/* INCLUDES ******************************************************************/
 
 #include <ntoskrnl.h>
+#define NDEBUG
 #include <internal/debug.h>
 
+/* GLOBALS *******************************************************************/
 
-/* FUNCTIONS *****************************************************************/
+MM_DRIVER_VERIFIER_DATA MmVerifierData;
+LIST_ENTRY MiVerifierDriverAddedThunkListHead;
+KMUTANT MmSystemLoadLock;
+ULONG MiActiveVerifierThunks;
 
+extern LIST_ENTRY ModuleListHead;
+
+/* PRIVATE FUNCTIONS *********************************************************/
+
+PLDR_DATA_TABLE_ENTRY
+NTAPI
+MiLookupDataTableEntry(IN PVOID Address)
+{
+    PLDR_DATA_TABLE_ENTRY LdrEntry, FoundEntry = NULL;
+    PLIST_ENTRY NextEntry;
+    PAGED_CODE();
+
+    /* Loop entries */
+    NextEntry = ModuleListHead.Flink;
+    do 
+    {
+        /* Get the loader entry */
+        LdrEntry =  CONTAINING_RECORD(NextEntry,
+                                      LDR_DATA_TABLE_ENTRY,
+                                      InLoadOrderLinks);
+
+        /* Check if the address matches */
+        if ((Address >= LdrEntry->DllBase) &&
+            (Address < (PVOID)((ULONG_PTR)LdrEntry->DllBase +
LdrEntry->SizeOfImage)))
+        {
+            /* Found a match */
+            FoundEntry = LdrEntry;
+            break;
+        }
+
+        /* Move on */
+        NextEntry = NextEntry->Flink;
+    } while(NextEntry != &ModuleListHead);
+
+    /* Return the entry */
+    return FoundEntry;
+}
+
+/* PUBLIC FUNCTIONS **********************************************************/
 
 /*
- * @unimplemented
+ * @implemented
  */
 NTSTATUS
-STDCALL
-MmAddVerifierThunks (
-    IN PVOID ThunkBuffer,
-    IN ULONG ThunkBufferSize
-    )
+NTAPI
+MmAddVerifierThunks(IN PVOID ThunkBuffer,
+                    IN ULONG ThunkBufferSize)
 {
-	UNIMPLEMENTED;
-	return STATUS_NOT_IMPLEMENTED;
+    PDRIVER_VERIFIER_THUNK_PAIRS ThunkPairs, DriverThunkTable;
+    ULONG ThunkCount;
+    PDRIVER_SPECIFIED_VERIFIER_THUNKS ThunkTable;
+    PLDR_DATA_TABLE_ENTRY LdrEntry;
+    PVOID ModuleBase, ModuleEnd;
+    ULONG i;
+    NTSTATUS Status = STATUS_SUCCESS;
+    PAGED_CODE();
+
+    /* Make sure the driver verifier is initialized */
+    if (!MiVerifierDriverAddedThunkListHead.Flink) return STATUS_NOT_SUPPORTED;
+
+    /* Get the thunk pairs and count them */
+    ThunkPairs = (PDRIVER_VERIFIER_THUNK_PAIRS)ThunkBuffer;
+    ThunkCount = ThunkBufferSize / sizeof(DRIVER_VERIFIER_THUNK_PAIRS);
+    if (!ThunkCount) return STATUS_INVALID_PARAMETER_1;
+
+    /* Now allocate our own thunk table */
+    ThunkTable = ExAllocatePoolWithTag(PagedPool,
+                                       sizeof(DRIVER_SPECIFIED_VERIFIER_THUNKS) +
+                                       ThunkCount *
+                                       sizeof(DRIVER_VERIFIER_THUNK_PAIRS),
+                                       TAG('M', 'm', 'V',
't'));
+    if (!ThunkTable) return STATUS_INSUFFICIENT_RESOURCES;
+
+    /* Now copy the driver-fed part */
+    DriverThunkTable = (PDRIVER_VERIFIER_THUNK_PAIRS)(ThunkTable + 1);
+    RtlCopyMemory(DriverThunkTable,
+                  ThunkPairs,
+                  ThunkCount * sizeof(DRIVER_VERIFIER_THUNK_PAIRS));
+
+    /* Acquire the system load lock */
+    KeEnterCriticalRegion();
+    KeWaitForSingleObject(&MmSystemLoadLock,
+                          WrVirtualMemory,
+                          KernelMode,
+                          FALSE,
+                          NULL);
+
+    /* Get the loader entry */
+    LdrEntry = MiLookupDataTableEntry(DriverThunkTable->PristineRoutine);
+    if (!LdrEntry)
+    {
+        /* Fail */
+        Status = STATUS_INVALID_PARAMETER_2;
+        goto Cleanup;
+    }
+
+    /* Get driver base and end */
+    ModuleBase = LdrEntry->DllBase;
+    ModuleEnd = (PVOID)((ULONG_PTR)LdrEntry->DllBase + LdrEntry->SizeOfImage);
+
+    /* Loop all the thunks */
+    for (i = 0; i < ThunkCount; i++)
+    {
+        /* Make sure it's in the driver */
+        if (((ULONG_PTR)DriverThunkTable->PristineRoutine < (ULONG_PTR)ModuleBase)
||
+            ((ULONG_PTR)DriverThunkTable->PristineRoutine >=
(ULONG_PTR)ModuleEnd))
+        {
+            /* Nope, fail */
+            Status = STATUS_INVALID_PARAMETER_2;
+            goto Cleanup;
+        }
+    }
+
+    /* Otherwise, add this entry */
+    ThunkTable->DataTableEntry = LdrEntry;
+    ThunkTable->NumberOfThunks = ThunkCount;
+    MiActiveVerifierThunks++;
+    InsertTailList(&MiVerifierDriverAddedThunkListHead,
+                   &ThunkTable->ListEntry);
+    ThunkTable = NULL;
+
+Cleanup:
+    /* Release the lock */
+    KeReleaseMutant(&MmSystemLoadLock, 1, FALSE, FALSE);
+    KeLeaveCriticalRegion();
+
+    /* Free the table if we failed and return status */
+    ExFreePool(ThunkTable);
+    return Status;
 }
 
+/*
+ * @implemented
+ */
+LOGICAL
+NTAPI
+MmIsDriverVerifying(IN PDRIVER_OBJECT DriverObject)
+{
+    PLDR_DATA_TABLE_ENTRY LdrEntry;
+
+    /* Get the loader entry */
+    LdrEntry = (PLDR_DATA_TABLE_ENTRY)DriverObject->DriverSection;
+    if (!LdrEntry) return FALSE;
+
+    /* Check if we're verifying or not */
+    return (LdrEntry->Flags & LDRP_DRIVER_VERIFYING) ? TRUE: FALSE;
+}
 
 /*
- * @unimplemented
- */
-
-ULONG
-STDCALL
-MmIsDriverVerifying (
-    IN struct _DRIVER_OBJECT *DriverObject
-    )
-{
-	UNIMPLEMENTED;
-	return 0;
-}
-
-
-/*
- * @unimplemented
+ * @implemented
  */
 NTSTATUS
-STDCALL
-MmIsVerifierEnabled (
-    OUT PULONG VerifierFlags
-    )
+NTAPI
+MmIsVerifierEnabled(OUT PULONG VerifierFlags)
 {
-	UNIMPLEMENTED;
-	return STATUS_NOT_IMPLEMENTED;
+    /* Check if we've actually added anything to the list */
+    if (MiVerifierDriverAddedThunkListHead.Flink)
+    {
+        /* We have, read the verifier level */
+        *VerifierFlags = MmVerifierData.Level;
+        return STATUS_SUCCESS;
+    }
+
+    /* Otherwise, we're disabled */
+    *VerifierFlags = 0;
+    return STATUS_NOT_SUPPORTED;
 }
 
 /* EOF */