Re: [uml-devel] [uml-user] uml and gdb debugging questions

[Blaisorblade <blaisorblade@yahoo.it>]

On Thursday 13 July 2006 21:37, Jeff Dike wrote:
> On Wed, Jul 12, 2006 at 09:05:22AM +0800, Miao Qingjun wrote:
> > I start "gdb uml", "b sys_init_module", then "run",
> > but gdb is not break at sys_init_module() when I insmod LKM?
> > Why? How can I do it?
>
> Some versions of gdb don't work well on UML.  One thing that often
> works is to attach to UML when it's booted, just before doing whatever
> you want to debug.
>
> 				Jeff
>
> > When I type control-c in gdb, the virtual console xterm is also
> > closed,
>
> How are you running UML?  You normally can't ^C to get back to gdb
> because the UML console has put the terminal in raw mode, so it can
> see ^C, ^Z, etc and pass them along to the UML foreground process.
>
> What I normally do is kill -INT <pid>, where pid is the lowest UML
> pid.
I forgot one note - I either attach gdb to UML after boot or boot it with con0 
redirected away from fd:0,fd:1.
And I often find that setting a breakpoint after UML has fully booted works 
better than setting it before boot. A lot better.

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale! 
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