[syslinux] Boot Error GPT partition
soltys at ziu.info
Sun Feb 20 15:42:15 PST 2011
On 11-01-18 21:56, H. Peter Anvin wrote:
> On 12/31/2010 02:58 AM, KESHAV P.R. wrote:
>> It seems extlinux installer of 4.04-preX does not correctly encode the
>> location of ldlinux.sys into the partition bootsector. I moved back to
>> 4.03-stable and reinstalled extlinux.
>> sudo extlinux --install /boot/syslinux -> 4.04-pre4
>> sudo extlinux --update /boot/syslinux -> 4.03-stable
>> leads to the "Boot error" (but both report the partition correctly)
>> but "extlinux --install" from 4.03 solved the problem (--update does
>> not work)". That means the post-4.03 syslinux/extlinux installer do
>> not encode the bootsector and ldlinux.sys properly. I have switched
>> back to extlinux, but grub2 did not give me any of there errors as it
>> uses a separate bios boot partition and does not use partition boot
>> sectors, thus no problem of shifting of ldlinux.sys within the
>> Thanks and Regards.
> Interesting... what MBR are you using?
I've run into the same problem as Keshav - freshly installed syslinux
(both ext and fat) always resulted with boot errors.
The commit responsible for that is:
Author: H. Peter Anvin <hpa at zytor.com>
Date: Tue Dec 14 09:53:42 2010 -0800
core, diskstart: add more sanity checks for handover info
Precisely, the culprit is this check:
cmp dx,1024 ; DS:SI < 1K (inside the IVT)?
cmp dx,1024 >> 4 ; DS:SI < 1K (inside the IVT)?
as we're still operating in segment units.
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