MmGetMdlVirtualAddress - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// wdm.h
#define MmGetMdlVirtualAddress(Mdl) \
((PVOID) ((PCHAR) ((Mdl)->StartVa) + (Mdl)->ByteOffset))
View the official Windows Driver Kit DDI referenceNo description available.
The MmGetMdlVirtualAddress macro returns the base virtual address of a buffer described by an MDL.
#define MmGetMdlVirtualAddress(Mdl) \
((PVOID) ((PCHAR) ((Mdl)->StartVa) + (Mdl)->ByteOffset))
Mdl [in]Pointer to an MDL that describes the buffer for which to return the initial virtual address.
MmGetMdlVirtualAddress returns the base virtual address of the buffer described by the MDL.
MmGetMdlVirtualAddress returns the starting virtual address of the MDL.
MmGetMdlVirtualAddress returns a virtual address that is not necessarily valid in the current thread context. Lower-level drivers should not attempt to use the returned virtual address to access memory, particularly user memory space.
The returned address, used as an index to a physical address entry in the MDL, can be input to MapTransfer.
Callers of MmGetMdlVirtualAddress can be running at any IRQL. Usually, the caller is running at IRQL = DISPATCH_LEVEL because this routine is commonly called to obtain the _CurrentVa_ parameter to MapTransfer.