kdserial.c File Reference

#include "kddll.h"

Include dependency graph for kdserial.c:

Go to the source code of this file.

Functions
VOID NTAPI	KdpSendBuffer (IN PVOID Buffer, IN ULONG Size)
KDP_STATUS NTAPI	KdpReceiveBuffer (OUT PVOID Buffer, IN ULONG Size)
KDP_STATUS NTAPI	KdpReceivePacketLeader (OUT PULONG PacketLeader)

Function Documentation

KdpReceiveBuffer()

KDP_STATUS NTAPI KdpReceiveBuffer	(	OUT PVOID	Buffer,
		IN ULONG	Size
	)

Definition at line 43 of file kdserial.c.

{
    PUCHAR ByteBuffer = Buffer;
    UCHAR Byte;
    KDP_STATUS Status;
 
    while (Size-- > 0)
    {
        /* Try to get a byte from the port */
        Status = KdpReceiveByte(&Byte);
        if (Status != KDP_PACKET_RECEIVED)
            return Status;
 
        *ByteBuffer++ = Byte;
    }
 
    return KDP_PACKET_RECEIVED;
}

Referenced by KdReceivePacket().

KdpReceivePacketLeader()

KDP_STATUS NTAPI KdpReceivePacketLeader

(

OUT PULONG

PacketLeader

)

Definition at line 75 of file kdserial.c.

{
    UCHAR Index = 0, Byte, Buffer[4];
    KDP_STATUS KdStatus;
 
    /* Set first character to 0 */
    Buffer[0] = 0;
 
    do
    {
        /* Receive a single byte */
        KdStatus = KdpReceiveByte(&Byte);
 
        /* Check for timeout */
        if (KdStatus == KDP_PACKET_TIMEOUT)
        {
            /* Check if we already got a breakin byte */
            if (Buffer[0] == BREAKIN_PACKET_BYTE)
            {
                return KDP_PACKET_RESEND;
            }
 
            /* Report timeout */
            return KDP_PACKET_TIMEOUT;
        }
 
        /* Check if we received a byte */
        if (KdStatus == KDP_PACKET_RECEIVED)
        {
            /* Check if this is a valid packet leader byte */
            if (Byte == PACKET_LEADER_BYTE ||
                Byte == CONTROL_PACKET_LEADER_BYTE)
            {
                /* Check if we match the first byte */
                if (Byte != Buffer[0])
                {
                    /* No, this is the new byte 0! */
                    Index = 0;
                }
 
                /* Store the byte in the buffer */
                Buffer[Index] = Byte;
 
                /* Continue with next byte */
                Index++;
                continue;
            }
 
            /* Check for breakin byte */
            if (Byte == BREAKIN_PACKET_BYTE)
            {
                KDDBGPRINT("BREAKIN_PACKET_BYTE\n");
                Index = 0;
                Buffer[0] = Byte;
                continue;
            }
        }
 
        /* Restart */
        Index = 0;
        Buffer[0] = 0;
    }
    while (Index < 4);
 
    /* Enable the debugger */
    KD_DEBUGGER_NOT_PRESENT = FALSE;
    SharedUserData->KdDebuggerEnabled |= 0x00000002;
 
    /* Return the received packet leader */
    *PacketLeader = *(PULONG)Buffer;
 
    return KDP_PACKET_RECEIVED;
}

Referenced by KdReceivePacket().

KdpSendBuffer()

VOID NTAPI KdpSendBuffer	(	IN PVOID	Buffer,
		IN ULONG	Size
	)

Definition at line 21 of file kdserial.c.

{
    PUCHAR ByteBuffer = Buffer;
 
    while (Size-- > 0)
    {
        KdpSendByte(*ByteBuffer++);
    }
}

Referenced by KdpSendControlPacket(), and KdSendPacket().