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From: John Baldwin <jhb@freebsd.org>
To: freebsd-hackers@freebsd.org
Subject: Re: kgdb modules
Date: Mon, 4 Feb 2013 14:58:16 -0500
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 (bigwig.baldwin.cx); Mon, 04 Feb 2013 15:46:24 -0500 (EST)
Cc: Matt Burke <mattblists@icritical.com>, Andriy Gapon <avg@freebsd.org>
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On Monday, February 04, 2013 6:43:43 am Andriy Gapon wrote:
> on 04/02/2013 12:36 Matt Burke said the following:
> > How do I get kgdb to load kernel modules from somewhere other than
> > /boot/kernel?
> > 
> > Googling tells me I need to use asf to create a file, but I haven't managed
> > to figure out how to get kgdb use the output.
> 
> Research in the direction of set sysroot, solib-absolute-prefix,
> solib-search-path.  I would not be surprised if the ancient gdb version on which
> kgdb is based does not support some of these settings.

It supports at least some of those.  You can also load modules manually by
using the add-kld command (give it a full path to an individual module).  You
may need to use 'nosharedlibrary' to unload symbols from the "wrong" module
before add-kld will be useful however.

-- 
John Baldwin