From owner-freebsd-hackers  Thu Apr  8 19:59:16 1999
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Date: Fri, 9 Apr 1999 12:27:03 +0930
From: Greg Lehey <grog@lemis.com>
To: "David E. Cross" <crossd@cs.rpi.edu>, freebsd-hackers@FreeBSD.ORG
Subject: Re: debugging a panic in a kld-ed kernel
References: <199904090247.WAA05496@cs.rpi.edu>
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In-Reply-To: <199904090247.WAA05496@cs.rpi.edu>; from David E. Cross on Thu, Apr 08, 1999 at 10:47:24PM -0400
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On Thursday,  8 April 1999 at 22:47:24 -0400, David E. Cross wrote:
> Somoone posted awhile back about how to get the kgdb to show symbols,
> debug information from a crash dump.  Could someone repost that, or
> point me to it, I cannot seem to find it.

I've posted a number of messages.  If you're tracking -CURRENT, take a
look at the .gdbinit* files in /usr/src/sys/modules/vinum.  The
Vinum-specific stuff won't help you much, but in .gdbinit.vinum.paths
there's this example:

define asf
   set $file = files.tqh_first
   set $found = 0
   while ($found == 0)
	p *$file
     if (*$file->filename == 'v')
	set $found = 1
     else
       set $file = $file->link.tqe_next
     end
   end
   shell /usr/bin/objdump --section-headers /modules/vinum/vinum.ko | grep ' .text' | awk '{print "add-symbol-file /modules/vinum/vinum.ko \$file->address+0x" $4}' > .asf
   source .asf
end

This kludge walks down the list of klds until it finds one with the
correct initial letter 'v' (see what I mean about kludge?) and creates
a file which it then sources in the last two lines.  With a little
modification it should work for any one kld.  Possibly you could fix
it to DTRT and make a command file for all klds.

Greg
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