Date: Fri, 20 May 2005 17:39:02 +0200 (MEST) From: "Aurel Bodenmann" <aurelbodenmann@gmx.ch> To: freebsd-hackers@freebsd.org Subject: kgdb doesn't seem to work, says "Cannot read PTD" Message-ID: <16574.1116603542@www14.gmx.net>
next in thread | raw e-mail | index | archive | help
Hello! My FreeBSD box is giving me quite a hard time, it panics from time to time (normally after a few days uptime), I suspect it has something to do with this cheap SATA controller I'm using (Promise SATA150 TX4). Anyway, I wanted to locate the problem and do something about it (aka submit an useful coredump to this list :-) but unfortunately neither gdb nor kgdb seem to work for me. I've tried to make a coredump as described in [1] and have now a kernel.debug file (containing the kernel with debug information) and a vmcore.1 file (whose size is 768MB as it should be). Now, I'm trying to open these two with gdb -k kernel.debug vmcore.1 but it says gdb: unrecognized option `-k' Use `gdb --help' for a complete list of options. so I read the manpage only to find out that -k still exists and that it should work like described in [1]. Ok, so I've tried kgdb but it gives me an error too: root> kgdb kernel.debug vmcore.1 kgdb: cannot read PTD after some googling I found out, that some people are having the same trouble ([2] and [3]) but unfortunately I couldn't find any advice on how-to create an useful coredump without using kgdb or gdb. I would really appreciate if someone could help me, I would like to help on this bug. Thanks, Aurel Bodenmann [1] http://www.onlamp.com/pub/a/bsd/2002/04/04/Big_Scary_Daemons.html [2] http://lists.freebsd.org/mailman/htdig/freebsd-hackers/2005-April/ 011461.html [3] http://lists.freebsd.org/pipermail/freebsd-stable/2005-May/ 014515.html -- 5 GB Mailbox, 50 FreeSMS http://www.gmx.net/de/go/promail +++ GMX - die erste Adresse für Mail, Message, More +++
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?16574.1116603542>