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Date: Fri, 9 Feb 2007 16:47:18 -0200
From: Ricardo Nabinger Sanchez <rnsanchez@wait4.org>
To: LI Xin <delphij@delphij.net>
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Cc: stable@freebsd.org, "Bruce M. Simpson" <bms@FreeBSD.org>,
	current@freebsd.org, wsk@gddsn.org.cn
Subject: Re: BTX halted with MegaRaid SCSI 320-2 on 6.2R help
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On Sat, 10 Feb 2007 00:45:36 +0800
LI Xin <delphij@delphij.net> wrote:

> >> esi=0000f69b edi=00040170 epb=000003d8 esp=00000358
                               ^^^  Typo of "ebp"?

> >> cs=f000 ds=0040 es=5d18    fs=9fc0 gs=f000 ss=9e17
> >> cs:eip=ec 50 e4 61 58 50 e4 61-58 ee 5a c3 01 00 e4 c3
> >>        12 00 00 41 d0 0c 02 08-80 00 03 00 79 00 79 00 00
> >> ss:esp=77 01 03 2c a1 00 08 2c-fa 02 00 e0 00 00 c0 9f
> >>        00 00 4e 80 f3 ee 00 f0-03 24 00 e0 06 02 00 80
> >> BTX halted
> >>
> >>
> >>   
> > 
> > It looks like BIOS code at f000:c3d4 is trying to read a word from I/O
> > port 0xfffa, and this is causing a GPF when it tries to write to what
> > looks like the BIOS data area at 0040:0058; "cursor position for video
> > page 4".
> > 
> >   0:   ec                      in     (%dx),%al
> >   1:   50                      push   %eax
> >   2:   e4 61                   in     $0x61,%al
> >   4:   58                      pop    %eax
> >   5:   50                      push   %eax
> >   6:   e4 61                   in     $0x61,%al
> >   8:   58                      pop    %eax
>                                  ^^^^^^^^^^^ The stack operations sound
> mad to me :-)  I think these is probably not what we expect...

Indeed, but the address in %esp doesn't look too bad: 0x358.  Wouldn't this be
inside the first 4K page?

-- 
Ricardo Nabinger Sanchez     <rnsanchez@{gmail.com,wait4.org}>
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