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Date: Fri, 14 Dec 2012 11:50:06 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: Alexey Dokuchaev <danfe@nsu.ru>
Subject: Re: 9.1 memstick install panics on boot
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Cc: Glen Barber <gjb@FreeBSD.org>, stable@FreeBSD.org
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on 14/12/2012 10:04 Alexey Dokuchaev said the following:
> On Fri, Dec 14, 2012 at 10:40:56AM +0700, Alexey Dokuchaev wrote:
>> On Thu, Dec 13, 2012 at 10:23:49PM -0500, Glen Barber wrote:
>>> If the memstick panics, I am not sure how much good the kernel symbols
>>> will do for you.
>>
>> It's OK, as long as they are provided, I should be able to modify the
>> memstick contents (like, after rw-mounted it) and copy debug-enabled
>> kernel in /boot.
> 
> On the second thought (try, actually) they are not too much helpful
> indeed, as I cannot get crashdump for post-mortem analysis (when symbols
> become useful), since panic happens so early debugger apparently has no
> idea of where to store the dump.

It looks like you obtained the boot messages using some sort of a remote console?
If yes, you can try to use kgdb for a live remote debugging.

> It seems I have to debug it the hard way
> (hello printf's).
> 
> Is it possible to cross build amd64 10.0 kernels on i386 8.3 machine?

amd64 on i386 - yes, 10 on 8.3 - not so sure...

-- 
Andriy Gapon