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Date: Sun, 30 Jan 2005 23:21:13 +0000
From: Nicolai E M Plum <nicolai@esperi.org>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
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Subject: Re: geom_mirror panic with pair of firewire disc
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Pawel Jakub Dawidek wrote:
> On Tue, Jan 18, 2005 at 02:33:41AM +0000, Nicolai E M Plum wrote:

> +> and on the console:
> +>=20
> +> Fatal double fault:
> +> eip =3D 0xc07a4acd
> +> esp =3D 0xd4226000
> +> ebp =3D 0xd4226014
> +> panic: double fault
> +> Uptime: 2h45m29s

> Could you get for me output of:

> 	# objdump -d -l `find /usr/obj/ -type f -name kernel.debug` | grep -5 ^c07a4acd:

(sorry about the delay, I've been away from this machine in the mean time)

I had to recompile the kernel to get a kernel.debug file, so the addresses in
the panic message have changed to:

Fatal double fault:
eip = 0xc0867e2b
esp = 0xd4225fd8
ebp = 0xd4226010
panic = double fault

So, using the new value of eip, I get this from objdump:

# objdump -d -l `find /usr/obj/ -type f -name kernel.debug` | grep -5 ^c0867e2b:
c0867e1f:       8b 5d 08                mov    0x8(%ebp),%ebx
c0867e22:       8b 55 0c                mov    0xc(%ebp),%edx
c0867e25:       8b 7d 18                mov    0x18(%ebp),%edi
c0867e28:       8b 75 1c                mov    0x1c(%ebp),%esi
/usr/src/sys/i386/i386/busdma_machdep.c:649
c0867e2b:       c7 45 ec 00 00 00 00    movl   $0x0,0xffffffec(%ebp)
/usr/src/sys/i386/i386/busdma_machdep.c:650
c0867e32:       c7 45 f0 00 00 00 00    movl   $0x0,0xfffffff0(%ebp)
/usr/src/sys/i386/i386/busdma_machdep.c:652
c0867e39:       85 d2                   test   %edx,%edx
c0867e3b:       74 06                   je     c0867e43  <bus_dmamap_load+0x33>

Is that any use?

Thanks

Nicolai