Linux 将 QEMU 窗口输出重定向到运行 qemu 的终端
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redirect QEMU window output to terminal running qemu
提问by yonigo
Im trying to debug the boot sequence of a linux kernel with qemu, the command i'm running is:
我试图用 qemu 调试 linux 内核的启动顺序，我正在运行的命令是：
qemu -serial stdio -kernel <path to kernel> -hda <path to rootfs> -append "root=/dev/sda terminal = ttyS0"
During boot all the kernel messages are printed to the QEMU window. Only when the boot has finished i get my prompt back to the terminal i ran QEMU in.
在引导期间，所有内核消息都打印到 QEMU 窗口。只有在启动完成后，我才会将提示返回到我运行 QEMU 的终端。
Now i can start using the kernel terminal I'm running and seeing the output in the terminal and not in QEMU window.
现在我可以开始使用我正在运行的内核终端，并在终端而不是 QEMU 窗口中看到输出。
How do i get all messages including the boot messages to my terminal and not to QEMU window (because i cant scroll up in that window..) ?
我如何将包括启动消息在内的所有消息发送到我的终端而不是 QEMU 窗口（因为我无法在该窗口中向上滚动..）？
采纳答案by Anton
- remove
-serial stdioparameter - add
-nographicparameter - and change the kernel parameter
terminal = ttyS0toconsole=ttyS0. This should do the trick.
- 删除
-serial stdio参数 - 添加
-nographic参数 - 并将内核参数更改
terminal = ttyS0为console=ttyS0. 这应该可以解决问题。
qemu -nographic -kernel ./bzImage -hda ./image.hda -append root=/dev/sda console=ttyS0
qemu -nographic -kernel ./bzImage -hda ./image.hda -append root=/dev/sda console=ttyS0
You may want to check the script I use for kernel development: https://github.com/arapov/wrap-qemukvm(it's not very "production", but you can find useful qemucliparameters there)
您可能想检查我用于内核开发的脚本：https: //github.com/arapov/wrap-qemukvm（它不是很“生产”，但您可以在qemucli那里找到有用的参数）
回答by rakib_
Redirecting Qemu output to terminal might cause some problem (personally i don't like it). You can using options like -noframe(this will create new window but won't any window frame) or -cursesto experience qemu output on terminal.
将 Qemu 输出重定向到终端可能会导致一些问题（我个人不喜欢它）。您可以使用类似的选项-noframe（这将创建新窗口但不会创建任何窗口框架）或-curses在终端上体验 qemu 输出。
回答by vinay hunachyal
refer this Redirect Qemu console to a file or the host terminal?to get the log on both qemu and your terminal .use
"console=ttyAMA0,115200 console=tty highres=off console=ttyS0"
将此重定向 Qemu 控制台引用到文件或主机终端？获取 qemu 和终端上的日志 .use
"console=ttyAMA0,115200 console=tty highres=off console=ttyS0"
