Re: Fresh installed Freebsd 9 don't boot from hd

on 22/10/2011 00:27 Andriy Gapon said the following:
> on 21/10/2011 23:33 John Baldwin said the following:
>> On Friday, October 21, 2011 4:58:51 am Dennis Koegel wrote:
>>> On Thu, Oct 20, 2011 at 11:28:08AM +0400, Pavel Timofeev wrote:
>>>> I used FreeBSD 9 amd64 on my HP Proliant DL360 G5 (smart array p400i 
>> mirror)
>>>> as test. [...]
>>>> It was fresh install and I choose guided partitioning (GPT)
>>>> But after reboot my server don't boot from hd.
>>>
>>> We have the same issue on a DL580 G7. Install runs fine, but when it's
>>> time for the first boot, the bootcode emits a single '-' (where usually
>>> it would be "spinning" for a moment while loading), hangs for about two
>>> seconds, and then reboots.
>>
>> Working offline with Dennis, we found that changing the CFLAGS in 
>> sys/boot/i386/gptboot/Makefile from "-O1" to "-Os -mrtd" (partially reverting 
>> an earlier commit) fixed gptboot.  The next test for someone to do would be to 
>> try just adding "-mrtd" and leaving "-O1" as-is to see if that fixes it.
> 
> Hmm, this is quite unexpected...  Do you have a hypothesis why not using -mrtd
> could cause a problem (a miscompilation?) ?

I've just got one: maybe the trouble is caused by the sio_putc procedure in
sys/boot/i386/btx/btx/btx.S.  It seems to be the only place in the boot code
where 'ret <number>' instruction is explicitly used.

A litmus question: do those experiencing the trouble all have BTX_SERIAL defined?

P.S. BTW, is BTX_SERIAL documented anywhere?

-- 
Andriy Gapon
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