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From: erandall@reo.dec.com (Ed Randall)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Kernel panic (stty) 2.0-950412SNAP
Date: 8 Jun 1995 10:26:36 GMT
Organization: Digital Equipment Corporation, Palo Alto, CA, USA
Lines: 43
Message-ID: <3r6j8s$3ne$1@usenet.pa.dec.com>
NNTP-Posting-Host: cics03.reo.dec.com
X-Newsreader: TIN [version 1.2 PL2]
I wonder if anyone's seen this :
First thing after a reboot, type :
$ stty -a -f /dev/cuaia0
(I happened to do it as "root", dunno if that makes a difference)
The result I get is :
Fatal trap 12 : page fault while in kernel mode
Fault virtual address = 0x80
Fault code = supervisor read, page not present
Instruction pointer = 0x8:0xf01a3557
Code segment = base 0x0, limit 0xfffff, type 0x1b
= DPC 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL=0
Current process = 149 (stty)
Interrupt mask =
panic: page fault
(presumably I could've gotten this from a log somewhere and
didn't need to type it all in ...)
I encountered this whilst writing a script to dialup my internet
service provider, the first thing it tries to do is set up the
serial port. It took quite a few reboots before I simplified it
down to that one command :-( It will happen consistently if I follow
the above procedure, but seems NOT to happen if the system's been up
a while, and "other" things have been run first. I'll try & track
down what those "other" things might be.
I'm running 950412-SNAP, intending on upgrading to 2.0.5-(BETA|R) soon;
Can anyone reproduce this, either on 950412-SNAP or 2.0.5-ALPHA ?
I trust THIS isn't the "null pointer trap" mentioned under the other
thread about string copies and null pointers ... I'd have expected
(and preferred ) a core dump :-)
cuaa0 is a 16550A, cuaa1 16450.
Ed
--
Ed Randall - freelance software engineer
Home : ed@orlando.demon.co.uk
Work : erandall@muffit.reo.dec.com