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60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* COPYRIGHT: GPL, see COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/base/kdvm/kdvbox.c
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* PURPOSE: VBOX data exchange function for kdvbox
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* PROGRAMMER: Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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#include "kdvm.h"
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typedef struct
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{
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ULONG SendSize;
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ULONG BufferSize;
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} KDVBOX_SEND_HEADER, *PKDVBOX_SEND_HEADER;
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typedef struct
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{
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ULONG ReceivedDataSize;
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} KDVBOX_RECEIVE_HEADER, *PKDVBOX_RECEIVE_HEADER;
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VOID
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NTAPI
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KdVmPrepareBuffer(VOID)
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{
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KdVmBufferPos = sizeof(KDVBOX_SEND_HEADER);
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}
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VOID
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NTAPI
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KdVmKdVmExchangeData(
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_Out_ PVOID* ReceiveData,
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_Out_ PULONG ReceiveDataSize)
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{
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PKDVBOX_SEND_HEADER SendHeader;
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PKDVBOX_RECEIVE_HEADER ReceiveHeader;
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/* Setup the send-header */
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SendHeader = (PKDVBOX_SEND_HEADER)KdVmDataBuffer;
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SendHeader->SendSize = KdVmBufferPos - sizeof(KDVBOX_SEND_HEADER);
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SendHeader->BufferSize = KDVM_BUFFER_SIZE;
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//KdpDbgPrint("Sending buffer:\n");
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//KdVmDbgDumpBuffer(KdVmDataBuffer, KdVmBufferPos);
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/* Do the data exchange */
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KdVmExchange((ULONG_PTR)KdVmBufferPhysicalAddress.QuadPart, 0);
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/* Reset the buffer position */
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KdVmBufferPos = sizeof(KDVBOX_SEND_HEADER);
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/* Get the receive-header and return information about the received data */
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ReceiveHeader = (PKDVBOX_RECEIVE_HEADER)KdVmDataBuffer;
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*ReceiveData = KdVmDataBuffer + sizeof(KDVBOX_RECEIVE_HEADER);
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*ReceiveDataSize = ReceiveHeader->ReceivedDataSize;
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//KdpDbgPrint("got data:\n");
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//KdVmDbgDumpBuffer(KdVmDataBuffer, *ReceiveDataSize + sizeof(*ReceiveHeader));
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}
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