GDB-将串行输出（从dmesg）重定向到文件，但不重定向gdb输出/ TUI？

Question

I'm using kgdb to debug something via a serial cable, so I "set remote /dev/ttyS1" in gdb, which gives me output from the remote machine through gdb.

Is there any way to redirect this output to a file WITHOUT redirecting the rest of gdb's output? It won't let me enable TUI, either. I'm using:

set logging file ~/gdb_output.log
set logging overwrite on
set logging redirect on
set logging on

Thanks!

Is both the serial coming in from my target machine and the output from gdb using stdout? What uses stdin, what uses stdoutm and what uses stderr?

Answer 1

How about using a redirect with run after setting up your remote target.

1. Start gdb without giving the debug_kernel as input:

2. Setup your remote connection

   (gdb) set remote /dev/ttyS1

3. Load the debug kernel file for gdb to start debugging

   (gdb) file debug_kernel

4. Run and pipe output to a file

   (gdb) run > file_to_save_kgdb_output

Check out this documentation for reference: http://sourceware.org/gdb/onlinedocs/gdb/Input_002fOutput.html