a panic on uart_z8530_class?

ben wilber ben at desync.com
Sat May 8 20:58:08 UTC 2010

On Sat, May 08, 2010 at 04:11:49PM -0400, Benjamin Kaduk wrote:
> > [root at test ~]# kgdb /boot/kernel/kernel /var/crash/vmcore.1
> > GNU gdb 6.1.1 [FreeBSD]
> > Copyright 2004 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and you are
> > welcome to change it and/or distribute copies of it under certain conditions.
> > Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for details.
> > This GDB was configured as "amd64-marcel-freebsd"...
> > Cannot access memory at address 0xffffff0127ffffe0
> > (kgdb) bt
> > #0  0x0000000000000000 in ?? ()
> > Cannot access memory at address 0x0
> > (kgdb) q
> I have seen this behavior from kgdb --- it doesn't seem to be able to 
> handle coredumps I've made recently.  At first I thought that I managed to 
> trash either my kernel image or kgdb binary with all the unclean 
> shutdowns I've been having, but if you're seeing kgdb failures, maybe it's 
> not just my local system.
> Yet I am assuming that this is not broken for *everyone*, or we would have 
> heard more noise about it.
> I'm running a current snapshot from April 4th; maybe I will try updating 
> to a new snapshot tonight and see if kgdb behaves better after everything 
> is rebuilt.

Same here, for the last couple months maybe.

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