It is important that you use a null modem cable; if you use a typical serial cable, the target computer expects a serial device and not another serial port, and you cannot debug the computer.

有一点很重要，那就是要使用零调制解调器电缆，如果您使用普通的串行电缆，目标计算机则期望与串行设备通信，而不是与另一个串行端口通信，这样您就无法调试该计算机。

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This article shows you how to set up the debug environment using serial communication port, how to compile modified kernel code, and how to start kernel debugging.

本文介绍如何使用串行通信端口来设置调试环境、如何编译经过修改的内核代码，以及如何开始内核调试。

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Listing 2 shows an example of how to launch a VM in debug mode and listen for a socket connection at port 8765.

清单2是一个示例，显示如何在调试模式下启动VM并监听端口8765的套接字连接。

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