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From: John Baldwin <jhb@freebsd.org>
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Date: Mon, 26 Mar 2012 10:59:35 -0400
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	(bigwig.baldwin.cx); Mon, 26 Mar 2012 11:01:35 -0400 (EDT)
Cc: Steve Kargl <sgk@troutmask.apl.washington.edu>
Subject: Re: general protection fault panic
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On Friday, March 23, 2012 6:23:13 pm Steve Kargl wrote:
> Haven't seen one of these in a long time.
> 
> %uname -a
> FreeBSD troutmask.apl.washington.edu 10.0-CURRENT FreeBSD
> 10.0-CURRENT #0 r233282: Wed Mar 21 12:39:16 PDT 2012
> kargl@troutmask.apl.washington.edu:/usr/obj/usr/src/sys/SPEW  amd64
> 
> Hand transcribed
> 
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 1; apic id = 01
> instruction pointer = 0x20:0xffffffff80570b89

Can you run gdb on your kernel.debug and 'l *' this address?

> stack pointer       = 0x28:0xffffff82327b4860
> frame pointer       = 0x28:0xffffff82327b4870
> code segment        = base 0x0, limit 0xfffff, type 0x1b
>                     = DPL0, pres 1, long 1, def32 0, gran 1
> processor eflags    = interrupt enabled, resume, IOPL = 0
> current process     = 1456 (ps)
> trap number         = 9
> panic: general protection fault
> cpuid = 1
> 
> The system then tries to reboot without dropping into the debugger.

-- 
John Baldwin