From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Sean Young <sean@mess.org>, Jeremy Fitzhardinge <jeremy@goop.org>,
Rusty Russell <rusty@rustcorp.com.au>,
linux-kernel@vger.kernel.org
Subject: Re: Regression: boot failure on AMD Elan TS-5500
Date: Sat, 05 Jul 2008 20:07:03 -0700 [thread overview]
Message-ID: <487036D7.4050400@zytor.com> (raw)
In-Reply-To: <m17ibz4tu4.fsf@frodo.ebiederm.org>
Eric W. Biederman wrote:
> Sean Young <sean@mess.org> writes:
>
>> On Mon, Jun 30, 2008 at 02:52:10PM -0700, Jeremy Fitzhardinge wrote:
>>> It's a bit odd that the boot loader neglected to set up ds properly, but
>>> changing the testb line to
>>>
>>> testb $(1<<6), %cs:BP_loadflags(%esi)
>>>
>>> should work. (Or perhaps a %ss: override would be better?)
>> Yup, it does (%cs: prefix).
>
> Guys I have a fuzzy memory of reads and definitely writes through %cs not working,
> on some processor models. i386?
>
You can never write through %cs in protected mode.
You can read through %cs: in protected mode unless %cs contains an
execute-only descriptor.
-hpa
prev parent reply other threads:[~2008-07-06 3:14 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-16 12:11 Regression: boot failure on AMD Elan TS-5500 Sean Young
2008-06-16 13:27 ` Rusty Russell
2008-06-16 13:37 ` Jeremy Fitzhardinge
2008-06-16 16:19 ` Sean Young
2008-06-16 17:06 ` H. Peter Anvin
2008-06-16 17:58 ` Sean Young
2008-06-16 18:16 ` H. Peter Anvin
2008-06-16 17:06 ` H. Peter Anvin
2008-06-16 17:07 ` Jeremy Fitzhardinge
2008-06-30 21:43 ` Sean Young
2008-06-30 21:52 ` Jeremy Fitzhardinge
2008-06-30 22:04 ` H. Peter Anvin
2008-06-30 22:14 ` H. Peter Anvin
2008-06-30 22:36 ` Jeremy Fitzhardinge
2008-06-30 22:45 ` H. Peter Anvin
2008-06-30 22:31 ` Sean Young
2008-06-30 22:34 ` Jeremy Fitzhardinge
2008-06-30 22:42 ` H. Peter Anvin
2008-07-01 19:59 ` Sean Young
2008-07-01 20:20 ` Sean Young
2008-07-01 20:24 ` Jeremy Fitzhardinge
2008-07-01 20:25 ` H. Peter Anvin
2008-07-15 22:23 ` Sean Young
2008-07-15 22:30 ` H. Peter Anvin
2008-07-01 20:22 ` Jeremy Fitzhardinge
2008-07-01 20:23 ` H. Peter Anvin
2008-07-01 20:29 ` Jeremy Fitzhardinge
2008-07-01 20:39 ` H. Peter Anvin
2008-07-06 13:21 ` Pavel Machek
2008-06-30 22:09 ` Sean Young
2008-07-06 2:41 ` Eric W. Biederman
2008-07-06 3:07 ` H. Peter Anvin [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=487036D7.4050400@zytor.com \
--to=hpa@zytor.com \
--cc=ebiederm@xmission.com \
--cc=jeremy@goop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
--cc=sean@mess.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.