[PATCH] ntoskrnl: Implement MmIsAddressValid
Detlef Riekenberg
wine.dev at web.de
Wed Mar 19 15:46:49 CDT 2008
---
dlls/ntoskrnl.exe/ntoskrnl.c | 31 +++++++++++++++++++++++++++++++
dlls/ntoskrnl.exe/ntoskrnl.exe.spec | 2 +-
2 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index 149cb51..6d1f4ff 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -562,6 +562,37 @@ 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)
+{
+ MEMORY_BASIC_INFORMATION info;
+ SIZE_T len;
+
+ TRACE("(%p)\n", VirtualAddress);
+ len = VirtualQuery(VirtualAddress, &info, sizeof(MEMORY_BASIC_INFORMATION));
+
+ if ((len == sizeof(MEMORY_BASIC_INFORMATION)) &&
+ (info.Protect & (PAGE_READWRITE | PAGE_EXECUTE_READWRITE)) &&
+ ((info.Protect & PAGE_NOACCESS) == 0) &&
+ (info.Type & MEM_COMMIT))
+ {
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/***********************************************************************
* 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
--=-71vi9jGfqg0uEFf5PLp5--
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