From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HOMSo-0005D8-M3 for user-mode-linux-devel@lists.sourceforge.net; Mon, 05 Mar 2007 15:19:30 -0800 Received: from [198.99.130.12] (helo=saraswathi.solana.com) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HOMSn-0008SJ-0d for user-mode-linux-devel@lists.sourceforge.net; Mon, 05 Mar 2007 15:19:30 -0800 Date: Mon, 5 Mar 2007 18:10:44 -0500 From: Jeff Dike Message-ID: <20070305231044.GB9525@ccure.user-mode-linux.org> References: <20070131224504.GA7698@ccure.user-mode-linux.org> <200702021848.40114.blaisorblade@yahoo.it> <20070202201230.GA8533@ccure.user-mode-linux.org> <200703060003.26856.blaisorblade@yahoo.it> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <200703060003.26856.blaisorblade@yahoo.it> Subject: Re: [uml-devel] [PATCH] x86_64 32-bit ptrace mangles sixth system call argument 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 Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Blaisorblade Cc: user-mode-linux-devel@lists.sourceforge.net On Tue, Mar 06, 2007 at 12:03:26AM +0100, Blaisorblade wrote: > > No, RCX corruption is different - that happens when a sysexit is done > > from a system call where userspace wasn't prepared to save and restore > > RCX. sigreturn is the best example. > > Hmm... we should finally fix that, at some point. Or... now that you explain > it this way, it could even seem unfixable... is it? Or maybe sysreturn should > become a syscall where the return must happen through the slow return path > (iret), if that exists for x86_64. This is fixed, and has been for a while. The fix was, as you suggest, return through iret in this case. > > But, a 32-bit UML making mmap calls through sysenter indeed does not run > > very well. > > Has this been fixed? I've read that Chuck Ebbert had already fixed this in > your diary, but not sent the patch. Yup, and I'm going to resurrect that patch. > I'd open an entry in bugzilla for this sort of things. It also seems that > Jason Lunz's patch about max_low_pfn is not even in your tree It is, I just haven't updated the site with it yet. Jeff -- Work email - jdike at linux dot intel dot com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel