Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263620AbTEEQnu (ORCPT ); Mon, 5 May 2003 12:43:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263657AbTEEQYk (ORCPT ); Mon, 5 May 2003 12:24:40 -0400 Received: from are.twiddle.net ([64.81.246.98]:22932 "EHLO are.twiddle.net") by vger.kernel.org with ESMTP id S263620AbTEEQWP (ORCPT ); Mon, 5 May 2003 12:22:15 -0400 Date: Mon, 5 May 2003 09:34:44 -0700 From: Richard Henderson To: David.Mosberger@acm.org Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH] fix vsyscall unwind information Message-ID: <20030505163444.GB9342@twiddle.net> Mail-Followup-To: David.Mosberger@acm.org, linux-kernel@vger.kernel.org References: <20030502004014$08e2@gated-at.bofh.it> <20030503210015$292c@gated-at.bofh.it> <20030504063010$279f@gated-at.bofh.it> <20030505074248.GA7812@twiddle.net> <16054.32214.804891.702812@panda.mostang.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <16054.32214.804891.702812@panda.mostang.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 921 Lines: 23 On Mon, May 05, 2003 at 08:05:58AM -0700, David Mosberger-Tang wrote: > Richard> Why? Certainly it isn't needed for x86. > > Certain applications (such as debuggers) want to know. Sure, you can > do symbol matching (if you have the symbol table) or code-reading > (assuming you know the exact sigreturn sequence), but having a marker > would be more reliable and faster. Eh. The whole point was to *eliminate* the special cases. If the debugger does nothing special now, it'll see the symbol from the VDSO in the backtrace and print __kernel_sigreturn. Isn't this sufficient for the user to recognize what's going on? Does it really need to print ? r~ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/