[PATCH] ntoskrnl.exe: Implement MmIsAddressValid

[Detlef Riekenberg]

---
 dlls/ntoskrnl.exe/ntoskrnl.c        |   19 +++++++++++++++++++
 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |    2 +-
 2 files changed, 20 insertions(+), 1 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 149cb51..a56aeb9 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -562,6 +562,25 @@ void WINAPI MmFreeNonCachedMemory( void *addr, SIZE_T size )
 }
 
 /***********************************************************************
+ *           MmIsAddressValid   (NTOSKRNL.EXE.@)
+ *
+ * Check, if the Process can access the Virtual Address without a Pagefault
+ *
+ * PARAMS
+ *  VirtualAddress [I] Address to check
+ *
+ * RETURNS
+ *  Failure: FALSE
+ *  Success: TRUE  (Accessing the Address works without a Pagefault)
+ *
+ */
+BOOLEAN WINAPI MmIsAddressValid(PVOID VirtualAddress)
+{
+    TRACE("(%p)\n", VirtualAddress);
+    return !IsBadWritePtr(VirtualAddress, sizeof(CHAR));
+}
+
+/***********************************************************************
  *           MmPageEntireDriver   (NTOSKRNL.EXE.@)
  */
 PVOID WINAPI MmPageEntireDriver(PVOID AddrInSection)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index dbe2152..461bf28 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -679,7 +679,7 @@
 @ stub MmGetVirtualForPhysical
 @ stub MmGrowKernelStack
 @ stub MmHighestUserAddress
-@ stub MmIsAddressValid
+@ stdcall MmIsAddressValid(ptr)
 @ stub MmIsDriverVerifying
 @ stub MmIsNonPagedSystemAddressValid
 @ stub MmIsRecursiveIoFault
-- 
1.5.3.6


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