Date: Thu, 15 Nov 2001 15:22:26 -0700 From: "Kenneth D. Merry" <ken@kdm.org> To: Dirk Froemberg <dirk@FreeBSD.ORG> Cc: stable@FreeBSD.ORG, phk@FreeBSD.ORG Subject: Re: kernel panic if using SCSI CDROM as root device Message-ID: <20011115152226.A35113@panzer.kdm.org> In-Reply-To: <20011115231115.B84012@physik.TU-Berlin.DE>; from dirk@FreeBSD.ORG on Thu, Nov 15, 2001 at 11:11:16PM %2B0100 References: <20011115003027.A87962@physik.TU-Berlin.DE> <20011115120432.A18404@physik.TU-Berlin.DE> <20011115145615.A34719@panzer.kdm.org> <20011115231115.B84012@physik.TU-Berlin.DE>
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On Thu, Nov 15, 2001 at 23:11:16 +0100, Dirk Froemberg wrote:
> Hi Kenneth!
>
> On Thu, Nov 15, 2001 at 02:56:15PM -0700, Kenneth D. Merry wrote:
> > [...]
> > Can you find out what line of code in dsioctl is causing the problem?
> >
> > If you built a debug kernel, you can do the following:
> >
> > gdb -k kernel.debug
> > list *(dsioctl+0x42)
> >
> > That should indicate which line in dsioctl is blowing up.
>
> Yes, of course:
>
> % gdb -k kernel.debug
> GNU gdb 4.18
> [...]
> (kgdb) list *(dsioctl+0x42)
> 0xc01b5216 is in dsioctl (/usr/src/sys/kern/subr_diskslice.c:357).
> 352 struct partition *pp;
> 353
> 354 slice = dkslice(dev);
> 355 ssp = *sspp;
> 356 sp = &ssp->dss_slices[slice];
> 357 lp = sp->ds_label;
> 358 switch (cmd) {
> 359
> 360 case DIOCGDVIRGIN:
> 361 lp = (struct disklabel *)data;
> (kgdb)
>
> Regards Dirk
Thanks!
Poul-Henning, any idea why this might be blowing up? It looks like the
slice pointer isn't initialized for some reason.
Ken
--
Kenneth Merry
ken@kdm.org
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