KDSTATUS
gdb_receive_and_interpret_packet(
_Out_ DBGKD_MANIPULATE_STATE64* State,
_Out_ PSTRING MessageData,
_Out_ PULONG MessageLength,
_Inout_ PKD_CONTEXT KdContext)
{
KDSTATUS Status;
do
{
Status = gdb_receive_packet(KdContext);
KDDBGPRINT("KDGBD: Packet received with status %u\n", Status);
if (Status != KdPacketReceived)
return Status;
Status = (KDSTATUS)-1;
switch (gdb_input[0])
{
case '?':
/* Send the Status */
gdb_send_exception(TRUE);
break;
case '!':
send_gdb_packet("OK");
break;
case 'g':
gdb_send_registers();
break;
case 'H':
handle_gdb_set_thread();
break;
case 'm':
Status = handle_gdb_read_mem(State, MessageData, MessageLength, KdContext);
break;
case 'p':
gdb_send_register();
break;
case 'q':
handle_gdb_query();
break;
case 'T':
handle_gdb_thread_alive();
break;
case 'v':
Status = handle_gdb_v(State, MessageData, MessageLength, KdContext);
break;
default:
/* We don't know how to handle this request. Maybe this is something for KD */
State->ReturnStatus = STATUS_NOT_SUPPORTED;
KDDBGPRINT("Unsupported GDB command: %s.\n", gdb_input);
return KdPacketReceived;
}
} while (Status == (KDSTATUS)-1);
return Status;
}
/******************************************************************************
* \name KdReceivePacket
* \brief Receive a packet from the KD port.
* \param [in] PacketType Describes the type of the packet to receive.
* This can be one of the PACKET_TYPE_ constants.
* \param [out] MessageHeader Pointer to a STRING structure for the header.
* \param [out] MessageData Pointer to a STRING structure for the data.
* \return KdPacketReceived if successful, KdPacketTimedOut if the receive
* timed out, KdPacketNeedsResend to signal that the last packet needs
* to be sent again.
* \note If PacketType is PACKET_TYPE_KD_POLL_BREAKIN, the function doesn't
* wait for any data, but returns KdPacketTimedOut instantly if no breakin
* packet byte is received.
* \sa http://www.nynaeve.net/?p=169
*/
KDSTATUS
NTAPI
KdReceivePacket(
_In_ ULONG PacketType,
_Out_ PSTRING MessageHeader,
_Out_ PSTRING MessageData,
_Out_ PULONG DataLength,
_Inout_ PKD_CONTEXT KdContext)
{
KDSTATUS Status;
DBGKD_MANIPULATE_STATE64* State;
/* Special handling for breakin packet */
if (PacketType == PACKET_TYPE_KD_POLL_BREAKIN)
{
return KdpPollBreakIn();
}
if (PacketType != PACKET_TYPE_KD_STATE_MANIPULATE)
{
/* What should we do ? */
while (1);
}
State = (DBGKD_MANIPULATE_STATE64*)MessageHeader->Buffer;
/* Maybe we are in a send<->receive loop that GDB doesn't need to know about */
if (KdpManipulateStateHandler != NULL)
return KdpManipulateStateHandler(State, MessageData, DataLength, KdContext);
/* Receive data from GDB */
Status = gdb_receive_packet(KdContext);
if (Status != KdPacketReceived)
return Status;
/* Interpret it */
return gdb_interpret_input(State, MessageData, DataLength, KdContext);
}
