Date: Mon, 19 Apr 2004 08:18:37 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Jorn Argelo <jorn@wcborstel.nl> Cc: questions@freebsd.org Subject: Re: Kernel debugging question Message-ID: <20040418224837.GP74025@wantadilla.lemis.com> In-Reply-To: <200404182001.46732.jorn@wcborstel.nl> References: <200404182001.46732.jorn@wcborstel.nl>
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--W4pDZ/VvazBYHhxQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sunday, 18 April 2004 at 20:01:46 +0200, Jorn Argelo wrote: > Hey folks, > > I've been trying to debug my kernel. I've successfully extracted a kernel dump > as described in the development handbook. However, as soon as I come across > this step, I don't know how to continue: > > # cd /usr/obj/usr/src/sys/KERNCONF > # gdb -k /boot/kernel/kernel.debug /var/crash/vmcore.0 > > The problem is, kernel.debug doesn't exist at all. This means you didn't build one. > I did an locate.updatedb as root and try to find it then, but I > still couldn't find it. Hopefully somebody can point me into the > right direction First you need to build a debug kernel. This probably means that the dump you have is "the one that got away". You could do some limited analysis of the stripped kernel, but that's Deep Magic. > (I used > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html) You might take a look at http://www.lemis.com/papers/Taiwan/tutorial.pdf, which is a little more update. Note, though, that it's still a draft. If you see any mistakes, please contact me. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html Note: I discard all HTML mail unseen. Finger grog@FreeBSD.org for PGP public key. See complete headers for address and phone numbers. --W4pDZ/VvazBYHhxQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQFAgwXFIubykFB6QiMRAieeAKCa2sJdv3dqK9Of8+XVUzHSOgH2TQCggGax ApSmphVsaQwGxmyzM2IGA7w= =yzrY -----END PGP SIGNATURE----- --W4pDZ/VvazBYHhxQ--
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