Date: Mon, 12 Apr 1999 10:54:32 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Greg Lehey <grog@lemis.com> Cc: Davis <dd002f@uhura.cc.rochester.edu>, freebsd-questions@FreeBSD.ORG Subject: Re: fatal trap! How do I escape? Message-ID: <Pine.BSF.4.03.9904121053070.3957-100000@resnet.uoregon.edu> In-Reply-To: <19990410095012.X2142@lemis.com>
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On Sat, 10 Apr 1999, Greg Lehey wrote:
> On Friday, 9 April 1999 at 16:09:26 -0700, Doug White wrote:
> > On Fri, 9 Apr 1999, Davis wrote:
> >
> >> That did it; pcm0 was detected (as pcm1, of course).
> >> BUT - several lines later (after the kernel loaded ep0, then npx0), I
> >> received the following message:
> >>
> >> Fatal trap 12: page fault while in kernel mode
> >> fault virtual address = 0x4
^^^
> > I've had odd boot-time crashes like this. Based on the fault address I'd
> > say it's a corrupted pointer.
>
> That's pretty good. How do you deduce that from the fault address?
> That's the usual reason for a "page fault", of course.
Well, it's looking for code in byte 4 of the kernel binary, which doesn't
contain useful code.
The solution: check your kernel config. Something you keyed in is wrong,
or there is a device conflict.
Doug White
Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve
http://gladstone.uoregon.edu/~dwhite | www.freebsd.org
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