Date: Thu, 26 Dec 1996 09:30:22 -0600 (CST) From: Curt Finch <curt@tkg.com> To: Greg Lehey <grog@lemis.de> Cc: FreeBSD Questions <questions@FreeBSD.org> Subject: Re: crash traceback Message-ID: <Pine.A32.3.91.961226092850.44162A-100000@spycam.tkg.com> In-Reply-To: <199612260254.DAA26571@freebie.lemis.de>
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this has been fixed with a change to the mouse driver /dev/mse0
by wunsch and dropped into latest freebsd src
thanx anyway
On Thu, 26 Dec 1996, Greg Lehey wrote:
> Curt Finch writes:
> >
> >
> > this is a traceback from a crash that occurs on my machine whenever i
> > try to fire up X. This happens with two completely different video
> > cards (one S3 and one S3V) with no other hardware (i.e. no ethernet
> > card or sound card) in the machine.
>
> I wonder how "completely different" these two boards are. Can you try
> it with a completely different chip set (say, ATI or Cirrus)?
>
> > anyone have a clue?
> >
> > freebsd2.1.5 xfree86 3.2 vga16 xserver in this case but the s3v and s3
> > xservers also crash me
> >
> > i can make the dump and kernel available for analysis
> >
> >
> > GDB 4.13 (i386-unknown-freebsd),
> > Copyright 1994 Free Software Foundation, Inc...
> > IdlePTD 207000
> > current pcb at 1f9210
> > panic: page fault
> > #0 boot (howto=256) at ../../i386/i386/machdep.c:912
> > 912 dumppcb.pcb_ptd = rcr3();
> > (kgdb) #0 boot (howto=256) at ../../i386/i386/machdep.c:912
> > #1 0xf0112b73 in panic (fmt=0xf01a724c "page fault")
> > at ../../kern/subr_prf.c:116
> > #2 0xf01a7d82 in trap_fatal (frame=0xefbffd6c) at ../../i386/i386/trap.c:748
> > #3 0xf01a78f4 in trap_pfault (frame=0xefbffd6c, usermode=0)
> > at ../../i386/i386/trap.c:670
> > #4 0xf01a7563 in trap (frame={tf_es = 16, tf_ds = -257425392, tf_edi = 27,
> > tf_esi = -1073545062, tf_ebp = -272630344, tf_isp = -272630380,
> > tf_ebx = -2147483648, tf_edx = 0, tf_ecx = -266316512, tf_eax = 0,
> > tf_trapno = 12, tf_err = 0, tf_eip = 0, tf_cs = 8, tf_eflags = 78470,
> > tf_esp = -266598368, tf_ss = 0}) at ../../i386/i386/trap.c:310
>
> This doesn't look nice. Your crash has wiped out the EIP register
> (program counter), so you don't know where it happened.
>
> > #5 0xf019d451 in calltrap ()
> > #6 0xf012fb53 in spec_open (ap=0xefbffe1c)
> > at ../../miscfs/specfs/spec_vnops.c:181
>
> This is the function that called the function which crapped out. The
> code at line 81 is:
>
> VOP_UNLOCK(vp);
> error = (*cdevsw[maj].d_open)(dev, ap->a_mode, S_IFCHR, ap->a_p);
> VOP_LOCK(vp);
>
> This looks as if you may have a corrupted cdevsw entry. With this
> dump, try:
>
> (kgdb) f 6 (select this stack frame)
> (kgdb) p maj (show the major device number)
> (kgdb) p cdevsw [maj] (show the contents of the entry)
>
> I'd guess you'll find that cdevsw[maj].d_open is 0.
>
> Let me know what the results are, and we can look further. I don't
> have time to go through a full dump analysis, however.
>
> Greg
>
--
Curt Finch - The Kernel Group Inc. - curt@tkg.com - (512)413-8005
- Find memory bugs even in stripped AIX binaries with a 7 day -
- FREE Evaluation of ZeroFault at ... http://www.TKG.com/ -
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