From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:36146)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <afaerber@suse.de>) id 1SXKNp-0007p3-0k
	for qemu-devel@nongnu.org; Wed, 23 May 2012 18:50:22 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <afaerber@suse.de>) id 1SXKNm-00076s-Rv
	for qemu-devel@nongnu.org; Wed, 23 May 2012 18:50:20 -0400
Received: from cantor2.suse.de ([195.135.220.15]:43020 helo=mx2.suse.de)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <afaerber@suse.de>) id 1SXKNm-00076X-LK
	for qemu-devel@nongnu.org; Wed, 23 May 2012 18:50:18 -0400
Message-ID: <4FBD699E.8000403@suse.de>
Date: Thu, 24 May 2012 00:50:06 +0200
From: =?ISO-8859-1?Q?Andreas_F=E4rber?= <afaerber@suse.de>
MIME-Version: 1.0
References: <CAFKAgTevCCbadGXzqGWVN6=uF7PT-M3kD_97X9K23hERgq0idQ@mail.gmail.com>
	<4FB4FE3E.7080407@suse.de>
	<CAFKAgTcTtsKUVwcqB=+1Mfq+Xz+1Spc440tcBYtdYk=YfVzHUg@mail.gmail.com>
In-Reply-To: <CAFKAgTcTtsKUVwcqB=+1Mfq+Xz+1Spc440tcBYtdYk=YfVzHUg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Subject: Re: [Qemu-devel] Signal management in qemu-user
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Alex Barcelo <abarcelo@ac.upc.edu>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-devel <qemu-devel@nongnu.org>, Alexander Graf <agraf@suse.de>

Am 24.05.2012 00:38, schrieb Alex Barcelo:
>>> Running it in a i386 machine works and gives an output of "0x0d\n0x20=
".
>>> Running it in a qemu-i386 segfaults. Because the self-modifying code
>>> raises a SIGSEGV in the qemu (I understand that it is the method used=
 by
>>> qemu to handle self-modifying code). But the sigprocmask disables the
>>> SIGSEGV and the qemu-user... does nothing to avoid it. So the SIGSEGV=
 is
>>> unmanaged and breaks the program.
>>
>> Alex has the following SIGSEGV workaround queued for our openSUSE pack=
age:
>> http://repo.or.cz/w/qemu/agraf.git/commit/0760e24b52ff20a328f168ed23b5=
2c9b9c0fd28f
>>
>> Don't know if it fixes your specific problem. Peter had some ideas how
>> to refactor signal handling but iirc didn't have time to work on it hi=
mself.
>=20
> Is it similar at all?

Peter answered that already: No, it isn't. Sorry for the confusion.

Andreas

--=20
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imend=F6rffer; HRB 16746 AG N=FCrnbe=
rg