From owner-cvs-all Wed Apr 18 12:15:44 2001 Delivered-To: cvs-all@freebsd.org Received: from finch-post-10.mail.demon.net (finch-post-10.mail.demon.net [194.217.242.38]) by hub.freebsd.org (Postfix) with ESMTP id 239F237B423; Wed, 18 Apr 2001 12:15:35 -0700 (PDT) (envelope-from dfr@nlsystems.com) Received: from [62.49.251.130] (helo=herring.nlsystems.com) by finch-post-10.mail.demon.net with esmtp (Exim 2.12 #1) id 14pxQL-0003lI-0A; Wed, 18 Apr 2001 19:15:33 +0000 Received: from salmon.nlsystems.com (salmon [10.0.0.3]) by herring.nlsystems.com (8.11.2/8.11.2) with ESMTP id f3IJEH786939; Wed, 18 Apr 2001 20:14:17 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Wed, 18 Apr 2001 20:14:16 +0100 (BST) From: Doug Rabson To: John Baldwin Cc: , Subject: Re: cvs commit: src/sys/alpha/alpha exception.s In-Reply-To: <200104181717.f3IHHtJ12069@freefall.freebsd.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 18 Apr 2001, John Baldwin wrote: > jhb 2001/04/18 10:17:55 PDT > > Modified files: > sys/alpha/alpha exception.s > Log: > Back out the previous revision as it causes random sig 11's to userland > processes until a better fix is found. I can see several possible races here. For instance, if an interrupt happened partway through restoring registers trying to return to userland, we could corrupt the user's t7 pretty easily. I can't quite think of the correct solution yet though. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message