How to get anything useful out of kgdb?

[Alexander Kabaev]

On Sat, 09 May 2015 11:30:59 -0700
Sean Bruno <sbruno at ignoranthack.me> wrote:

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> On 05/09/15 11:09, Jeff Meegan wrote:
> > You could try -O0, but also if you just care about txr, go up to
> > frame 12 where txr initialized to the context arg to em_handle_tx()
> > and print it out there.
> > 
> > -j
> 
> I'm guessing that the place to change -O2 -> -O0 is in kern.pre.mk ?
> 
> sean

No, it means you need to iescover DEBUG and how it affects optimization
level :)

.if defined(DEBUG)
_MINUS_O=       -O
CTFFLAGS+=      -g
.else
...

Say, I have 'makeoptions     DEBUG="-g -gdwarf-2"' in my kernel config
file. -gdwarf-2 is probably not required anymore.

--
Alexander Kabaev
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