From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1aggIk-00050a-JU for user-mode-linux-devel@lists.sourceforge.net; Thu, 17 Mar 2016 22:21:54 +0000 Received: from a.ns.miles-group.at ([95.130.255.143] helo=radon.swed.at) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1aggIj-0000va-3z for user-mode-linux-devel@lists.sourceforge.net; Thu, 17 Mar 2016 22:21:54 +0000 References: <1458091505-967-1-git-send-email-elicooper@gmx.com> From: Richard Weinberger Message-ID: <56EB2DF8.8030102@nod.at> Date: Thu, 17 Mar 2016 23:21:44 +0100 MIME-Version: 1.0 In-Reply-To: <1458091505-967-1-git-send-email-elicooper@gmx.com> Subject: Re: [uml-devel] [PATCH] um: fix FPU register double-restore after sigreturn List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Eli Cooper , user-mode-linux-devel@lists.sourceforge.net Cc: Jeff Dike Eli, Am 16.03.2016 um 02:25 schrieb Eli Cooper: > This patch prevents userspace() from incorrectly restoring FPU registers > after a sigreturn or rt_sigreturn system call, which has already restored > FPU registers to the state prior to the signal handler was invoked. > > Fixes FPU state corruption after invoking the signal handler. First of all, thanks a lot for hunting down these nasty issues! Where exactly are the FPU regs restored in the sigregturn case? Not sure if I fully understand the error scenario. Thanks, //richard ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel