From: Avi Kivity <avi@redhat.com>
To: "Kevin O'Connor" <kevin@koconnor.net>,
"seabios@seabios.org" <seabios@seabios.org>,
KVM list <kvm@vger.kernel.org>
Subject: Re: seabios 0.6.1 regression
Date: Mon, 15 Nov 2010 17:41:07 +0200 [thread overview]
Message-ID: <4CE15493.7070907@redhat.com> (raw)
In-Reply-To: <4CE15307.40801@redhat.com>
On 11/15/2010 05:34 PM, Avi Kivity wrote:
> On 11/15/2010 05:12 PM, Avi Kivity wrote:
>>
>> That was premature, the real culprit (if I didn't mess up the bisect)
>> is:
>>
>> commit 6039fc55274deb7202060d08e0f23b9f3dcface4
>> Author: Kevin O'Connor <kevin@koconnor.net>
>> Date: Wed Aug 25 21:43:19 2010 -0400
>>
>> Update qemu_cfg_read to use "rep insb".
>>
>> Use rep insb instead of manual loop - the host may be able to
>> optimize
>> the rep insb instruction.
>>
>> Which doesn't make any sense - will do more testing.
>>
>
> Confirmed with multiple tests.
>
I think it's a miscompile.
out/code16.o:
1a4: 3e ds
1a5: 6c insb (%dx),%es:(%edi)
Note no 66 prefix.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-11-15 15:41 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-15 13:39 seabios 0.6.1 regression Avi Kivity
2010-11-15 15:04 ` Avi Kivity
2010-11-15 15:12 ` Avi Kivity
2010-11-15 15:34 ` Avi Kivity
2010-11-15 15:41 ` Avi Kivity [this message]
2010-11-15 15:49 ` Avi Kivity
2010-11-15 16:09 ` Avi Kivity
2010-11-16 0:18 ` Kevin O'Connor
2010-11-16 9:05 ` Avi Kivity
2010-11-16 10:47 ` Avi Kivity
2010-11-16 13:19 ` Alexander Graf
2010-11-16 14:15 ` Avi Kivity
2010-11-16 14:17 ` Alexander Graf
2010-11-16 14:27 ` Avi Kivity
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