RxMapSystemBuffer function (rxprocs.h)
RxMapSystemBuffer returns the system buffer address from the IRP.
Syntax
PVOID RxMapSystemBuffer(
[in] IN PRX_CONTEXT RxContext,
[in] IN PIRP Irp
);
Parameters
[in] RxContext
A pointer to the RX_CONTEXT structure for this request.
[in] Irp
A pointer to the IRP for this request.
Return value
RxMapSystemBuffer returns a mapped address pointer.
Remarks
The RxMapSystemBuffer routine checks that Irp->MdlAddress is not NULL and returns the Irp->AssociatedIrp.SystemBuffer when this is the case.
On retail builds, RxMapSystemBuffer will call MmGetSystemAddressForMdlSafe to return the MDL from the IRP if Irp->MdlAddress is NULL. On checked builds, RxMapSystemBuffer causes the system to ASSERT if Irp->MdlAddress is NULL.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | rxprocs.h (include Rxcontx.h, Rxprocs.h) |
| IRQL | <= APC_LEVEL |