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Date:      Mon, 19 Apr 2004 21:05:57 +0930
From:      Greg 'groggy' Lehey <grog@FreeBSD.org>
To:        Jorn Argelo <jorn@wcborstel.nl>
Cc:        questions@freebsd.org
Subject:   Re: Kernel debugging question
Message-ID:  <20040419113557.GA74025@wantadilla.lemis.com>
In-Reply-To: <200404191256.56436.jorn@wcborstel.nl>
References:  <200404182001.46732.jorn@wcborstel.nl> <200404191145.37313.jorn@wcborstel.nl> <20040419100645.GY74025@wantadilla.lemis.com> <200404191256.56436.jorn@wcborstel.nl>

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On Monday, 19 April 2004 at 12:56:56 +0200, Jorn Argelo wrote:
> [snip]
>
>>
>>> I did enable the rest though. This is the output of the debugging,
>>
>> What is the output of the "debugging"?  Your message contained only
>> the panic message and the gdb prompt:
>
> I used the gdb -k /boot/kernel/kernel.debug /home/jorn/dump/vmcore.0 command,
> and the output with the previous mail was the output of that command. A
> small, perhaps irrelevant sidenote, is that the kernel.debug file was only
> located in the /usr/obj/usr/src/sys/KERNCONF, and not in /boot/kernel as
> described in the documentation of FreeBSD.

The location of the file isn't important, but it must be the same
kernel which caused the dump.

>>> #0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
>>> (kgdb)
>
>> You want at least a backtrace.
>
> How do I do that? I'm sorry, but I've never done a kernel debug or
> anything.

That's why I pointed you to the documentation explaining what to do:

On Mon, 19 Apr 2004 08:18:37 +0930, Greg 'groggy' Lehey wrote:
> You might take a look at
> http://www.lemis.com/papers/Taiwan/tutorial.pdf, which is a little
> more up to date.  Note, though, that it's still a draft.  If you see
> any mistakes, please contact me.

Greg
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