Detlef Riekenberg : ntoskrnl.exe: Implement MmIsAddressValid.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f3380958bda9d53475ad5d14aa2ccf1ae7ab2e06
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=f3380958bda9d53475ad5d14aa2ccf1ae7ab2e06

Author: Detlef Riekenberg <wine.dev at web.de>
Date:   Fri Mar 21 21:25:40 2008 +0100

ntoskrnl.exe: Implement MmIsAddressValid.

---

 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..6a3c9f3 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, 1);
+}
+
+/***********************************************************************
  *           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