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Date:      Wed, 25 Jan 2012 16:53:42 +0100
From:      Michiel Boland <boland37@xs4all.nl>
To:        freebsd-sparc64@freebsd.org
Subject:   Re: Howto debug Kernel problems ? (jail -r -> freeze)
Message-ID:  <4F202586.5010808@xs4all.nl>
In-Reply-To: <926170B2-9DF2-4DCC-9643-E66E6504B185@4lin.net>
References:  <5C638638-3D1A-417E-A574-9BCE51E08C59@4lin.net>	<20120124202111.GB7731@alchemy.franken.de>	<431CCA8C-2E5E-43BC-89EE-7F06CF8E8E8D@4lin.net>	<20120125150054.GA15762@alchemy.franken.de> <926170B2-9DF2-4DCC-9643-E66E6504B185@4lin.net>

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On 01/25/2012 16:09, Denny Schierz wrote:
>
> Am 25.01.2012 um 16:00 schrieb Marius Strobl:
>>
>> Not that I'm aware of. Do you have a kernel built with options
>> BREAK_TO_DEBUGGER? Does it work when the machine doesn't hang
>
> jupp, I have
>
>> (you can resume via the "continue" command in the kernel
>
> works too
>
>> debugger)? Do you send the break via the "break" command of the
>> ALOM or by sending a break via a terminal attached to the ALOM
>> console?
>
>
> ssh alom ->  login ->  type break ->  type console -f ->  normal freebsd console
>
> but, It happens nothing. I expected to get into the kdb.
>
> cu denny

What happens if you do

# sysctl debug.kdb.alt_break_to_debugger=1

then type the alternate break sequence (Enter ~ ^B) on the console?



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