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Date: Tue, 12 Feb 2013 21:02:29 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: David Demelier <demelier.david@gmail.com>
Subject: Re: Panic at shutdown
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on 12/02/2013 20:44 David Demelier said the following:
> Le mardi 12 février 2013 10:01:10 Andriy Gapon a écrit :
>> on 12/02/2013 09:57 David Demelier said the following:
>>> Yes I have added debugging option in my kernel. I have makeoptions
>>> DEBUG=-g in my config. Do I need more ?
>>
>> .symbols?
> 
> I don't understand what you are saying, I have /boot/kernel/kernel.symbols. 
> Please tell me what I'm doing wrong. I've just read and done the steps written 
> there :
> 
> http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-
> gdb.html
> 
> So I've run 
> 
> # cd /usr/obj/usr/src/sys/Melon
> # kgdb kernel.debug /var/crash/vmcore.0
> 
> and that's the only trace I get using bt full :
> 
> 229     #define IS_BSP()        (PCPU_GET(cpuid) == 0)
> (kgdb) bt full
> #0  doadump (textdump=<value optimized out>) at pcpu.h:229
> No locals.
> #1  0x0000000000000000 in ?? ()
> No symbol table info available.

I don't know what you are doing wrong, but the above message ("No symbol table
info available") is wrong.
Perhaps your world (kgdb) and kernel are out of sync, maybe something else...

-- 
Andriy Gapon