Date: Wed, 14 Nov 2012 13:17:28 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: freebsd-current@FreeBSD.org Subject: Re: Supermicro X8DT6 crashes in bootloader after r239066 Message-ID: <50A37DC8.9030108@FreeBSD.org> In-Reply-To: <20121031053113.GA1446@itx> References: <CAFMmRNxxcka3oRKAyq=0Hts43VM-bvzWX_VDbyFpFV5thJOL%2Bw@mail.gmail.com> <20121031053113.GA1446@itx>
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on 31/10/2012 07:31 Navdeep Parhar said the following:
> I have one of these X8DT6 systems. It has grub2 as the primary boot
> loader which then loads zfsloader. Many weeks back I updated the BIOS,
> grub, and FreeBSD and ran into a similar problem -- zfsloader would
> start, print a few messages, and then the system would reboot. I
> tracked it down to the int 0x13 call (with eax=0x4800) in bd_int13probe.
> It would walk past the end of the edd_params structure and corrupt the
> return address on the stack. I worked around it by padding edd_params.
> I was planning to debug it further to find out which of the 3 things
> that were updated caused the problem but Other Things(tm) came up. See
> if this works for you too:
>
> diff -r d35d326e437a -r e5228169f3f1 sys/boot/i386/common/edd.h
> --- a/sys/boot/i386/common/edd.h Tue Oct 30 21:51:09 2012 -0700
> +++ b/sys/boot/i386/common/edd.h Tue Oct 30 21:51:20 2012 -0700
> @@ -62,6 +62,7 @@ struct edd_params {
> uint16_t sector_size;
> uint16_t edd_params_seg;
> uint16_t edd_params_off;
> + char pad[64];
> };
Navdeep,
I've committed a different antidote for this BIOS bug as r243025.
Could you please that it works for you too?
--
Andriy Gapon
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