From: Andi Kleen <andi@firstfloor.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Richard Guenther <richard.guenther@gmail.com>,
Joe Buck <Joe.Buck@synopsys.com>, Michael Matz <matz@suse.de>,
Jan Hubicka <hubicka@ucw.cz>,
Aurelien Jarno <aurelien@aurel32.net>,
linux-kernel@vger.kernel.org, gcc@gcc.gnu.org
Subject: Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction flag
Date: 06 Mar 2008 09:44:05 +0100 [thread overview]
Message-ID: <87ablcgs2y.fsf@basil.nowhere.org> (raw)
In-Reply-To: <47CF11D6.7070901@zytor.com>
"H. Peter Anvin" <hpa@zytor.com> writes:
> Richard Guenther wrote:
> > We didn't yet run into this issue and build openSUSE with 4.3 since
> > more than
> > three month.
> >
>
> Well, how often do you take a trap inside an overlapping memmove()?
That was the state with older gcc, but with newer gcc it does not necessarily
reset the flag before the next function call.
so e.g. if you have
memmove(...)
for (... very long loop .... ) {
/* no function calls */
/* signals happen */
}
the signal could see the direction flag
-Andi
next prev parent reply other threads:[~2008-03-06 8:44 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-05 15:30 Linux doesn't follow x86/x86-64 ABI wrt direction flag Aurelien Jarno
2008-03-05 16:00 ` H. Peter Anvin
2008-03-05 19:58 ` Joe Buck
2008-03-05 20:23 ` Aurelien Jarno
2008-03-05 20:38 ` Michael Matz
2008-03-05 20:42 ` Joe Buck
2008-03-05 20:49 ` Jan Hubicka
2008-03-05 21:02 ` Michael Matz
2008-03-05 21:20 ` RELEASE BLOCKER: " Joe Buck
2008-03-05 21:32 ` Richard Guenther
2008-03-05 21:34 ` H. Peter Anvin
2008-03-05 21:40 ` Richard Guenther
2008-03-05 22:16 ` David Miller
2008-03-05 22:37 ` Joe Buck
2008-03-05 22:51 ` Michael Matz
2008-03-05 22:58 ` H. Peter Anvin
2008-03-05 23:07 ` Michael Matz
2008-03-05 23:10 ` David Miller
2008-03-05 23:16 ` Joe Buck
2008-03-05 23:12 ` Olivier Galibert
2008-03-05 21:43 ` Joe Buck
2008-03-05 21:44 ` Richard Guenther
[not found] ` <738B72DB-A1D6-43F8-813A-E49688D05771@apple.com>
2008-03-05 21:59 ` Michael Matz
2008-03-05 22:13 ` Adrian Bunk
2008-03-05 22:21 ` David Miller
2008-03-05 23:13 ` Olivier Galibert
2008-03-06 0:36 ` Chris Lattner
2008-03-06 0:47 ` H. Peter Anvin
[not found] ` <578FCA7D-D7A6-44F6-9310-4A97C13CDCBE@apple.com>
2008-03-06 1:12 ` H. Peter Anvin
2008-03-06 9:17 ` Jakub Jelinek
2008-03-06 13:51 ` Olivier Galibert
2008-03-06 14:03 ` Paolo Bonzini
2008-03-06 14:12 ` Olivier Galibert
2008-03-06 14:15 ` Andrew Haley
2008-03-06 17:58 ` Joe Buck
2008-03-06 18:10 ` Olivier Galibert
2008-03-06 18:13 ` Paolo Bonzini
2008-03-06 18:31 ` Jack Lloyd
2008-03-06 18:35 ` Andrew Pinski
2008-03-06 19:44 ` Paolo Bonzini
2008-03-06 19:43 ` Paolo Bonzini
2008-03-06 20:16 ` Jack Lloyd
2008-03-06 21:37 ` Artur Skawina
2008-03-06 15:09 ` Robert Dewar
2008-03-06 15:37 ` NightStrike
2008-03-06 15:43 ` H.J. Lu
2008-03-06 15:50 ` H. Peter Anvin
2008-03-06 16:23 ` Jakub Jelinek
2008-03-06 16:27 ` İsmail Dönmez
2008-03-06 16:58 ` H.J. Lu
2008-03-06 17:06 ` H. Peter Anvin
2008-03-06 17:14 ` H.J. Lu
2008-03-06 17:17 ` H. Peter Anvin
2008-03-06 17:34 ` H.J. Lu
2008-03-06 19:35 ` Robert Dewar
2008-03-06 17:18 ` Robert Dewar
2008-03-06 17:19 ` H. Peter Anvin
2008-03-06 19:25 ` Robert Dewar
2008-03-06 20:37 ` H. Peter Anvin
2008-03-07 8:28 ` Florian Weimer
2008-03-07 8:00 ` Andreas Jaeger
2008-03-06 15:57 ` Robert Dewar
2008-03-06 16:29 ` Paolo Bonzini
2008-03-06 17:18 ` H. Peter Anvin
2008-03-06 16:14 ` Artur Skawina
2008-03-06 0:49 ` Aurelien Jarno
2008-03-05 22:05 ` H. Peter Anvin
2008-03-06 2:11 ` Krzysztof Halasa
2008-03-06 8:44 ` Andi Kleen [this message]
2008-03-06 9:01 ` Jakub Jelinek
2008-03-06 15:20 ` H. Peter Anvin
2008-03-05 21:45 ` Aurelien Jarno
2008-03-05 21:43 ` Andrew Pinski
2008-03-05 21:43 ` Michael Matz
2008-03-05 22:12 ` Joe Buck
2008-03-05 22:17 ` David Miller
2008-03-05 23:17 ` Olivier Galibert
2008-03-05 23:21 ` David Daney
2008-03-06 14:06 ` Olivier Galibert
2008-03-08 19:10 ` Alexandre Oliva
2008-03-05 21:07 ` H. Peter Anvin
2008-03-05 20:44 ` H. Peter Anvin
2008-03-05 20:52 ` Aurelien Jarno
2008-03-05 21:23 ` David Miller
2008-03-06 9:53 ` Andrew Haley
2008-03-06 11:45 ` Andi Kleen
2008-03-06 12:06 ` Richard Guenther
2008-03-06 17:34 ` Joe Buck
2008-03-06 20:54 ` Richard Guenther
2008-03-06 20:56 ` H. Peter Anvin
2008-03-06 22:06 ` Andi Kleen
2008-03-07 4:56 ` Chris Lattner
2008-03-07 14:09 ` Michael Matz
2008-03-06 9:45 ` Mikael Pettersson
2008-03-05 16:56 ` H.J. Lu
2008-03-05 18:14 ` [PATCH] x86: Clear DF before calling signal handler Aurelien Jarno
2008-03-05 18:17 ` H. Peter Anvin
2008-03-06 9:21 ` Ingo Molnar
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