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 Message-ID: <19990409122703.J2142@lemis.com> In-Reply-To: <199904090247.WAA05496@cs.rpi.edu>; from David E. Cross on Thu, Apr 08, 1999 at 10:47:24PM -0400 References: <199904090247.WAA05496@cs.rpi.edu>
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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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