How to debug a kernel thread?

Mulyadi Santosa mulyadi.santosa at
Fri Mar 30 10:48:28 EDT 2012

Hi Parmenides..

On Fri, Mar 30, 2012 at 19:00, Parmenides <mobile.parmenides at> wrote:
> In the guest, 'mymodule.ko' is inserted again
>                  insmod mymodule.ko
> I found that the breakpoint set at mymodule.c:37 is triggered this
> time surprisingly, and the 'insmod' didn't return immediately until
> the gdb is given with another 'continue' command.
>                  (gdb) continue
> Then, the breakpoint doesn't triggered anymore as usual,

Reading your above explanation, assuming that you inserted the symbol
file into the right offset, I think you might found a bug in Qemu's
gdb stub itself.

I highly suggest you report this problem directly to qemu-devel list
to get quick fix.


Mulyadi Santosa
Freelance Linux trainer and consultant


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