public string ParseRequest(GDBPacket packet, out bool isSignal) { var result = StandartAnswers.Empty; isSignal = false; // ctrl+c is SIGINT if (packet.GetBytes()[0] == 0x03) { _target.DoStop(); result = StandartAnswers.Interrupt; isSignal = true; } try { switch (packet.CommandName) { case '\0': // Command is empty ("+" in 99.99% cases) return(null); case 'q': result = GeneralQueryResponse(packet); break; case 'Q': result = GeneralQueryResponse(packet); break; case '?': result = GetTargetHaltedReason(packet); break; case '!': // extended connection break; case 'g': // read registers result = ReadRegisters(packet); break; case 'G': // write registers result = WriteRegisters(packet); break; case 'm': // read memory result = ReadMemory(packet); break; case 'M': // write memory result = WriteMemory(packet); break; case 'X': // write memory binary // Not implemented yet, client shoul use M instead //result = StandartAnswers.OK; break; case 'p': // get single register result = GetRegister(packet); break; case 'P': // set single register result = SetRegister(packet); break; case 'v': // some requests, mainly vCont result = ExecutionRequest(packet); break; case 's': //stepi _target.CPU.ExecCycle(); result = "T05"; break; case 'z': // remove bp result = RemoveBreakpoint(packet); break; case 'Z': // insert bp result = SetBreakpoint(packet); break; case 'k': // Kill the target break; case 'H': // set thread result = StandartAnswers.OK; // we do not have threads, so ignoring this command is OK break; case 'c': // continue _target.DoRun(); result = null; break; case 'D': // Detach from client _target.DoRun(); result = StandartAnswers.OK; break; } } catch (Exception ex) { _target.LogException?.Invoke(ex); result = GetErrorAnswer(Errno.EPERM); } if (result == null) { return("+"); } else { return(FormatResponse(result)); } }
private async Task ProcessGdbClient(TcpClient tcpClient) { NetworkStream clientStream = tcpClient.GetStream(); GDBSession session = new GDBSession(_target); byte[] message = new byte[0x1000]; int bytesRead; _target.DoStop(); while (true) { try { bytesRead = await clientStream.ReadAsync(message, 0, 4096); } catch (IOException iex) { var sex = iex.InnerException as SocketException; if (sex == null || sex.SocketErrorCode != SocketError.Interrupted) { _target.LogException?.Invoke(sex); } break; } catch (SocketException sex) { if (sex.SocketErrorCode != SocketError.Interrupted) { _target.LogException?.Invoke(sex); } break; } catch (Exception ex) { _target.LogException?.Invoke(ex); break; } if (bytesRead == 0) { //the client has disconnected from the server break; } if (bytesRead > 0) { GDBPacket packet = new GDBPacket(message, bytesRead); _target.Log?.Invoke($"--> {packet}"); bool isSignal; string response = session.ParseRequest(packet, out isSignal); if (response != null) { if (isSignal) { await SendGlobal(response); } else { await SendResponse(clientStream, response); } } } } tcpClient.Client.Shutdown(SocketShutdown.Both); }