From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4329 invoked by alias); 3 Apr 2005 00:34:47 -0000 Mailing-List: contact gdb-patches-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sources.redhat.com Received: (qmail 4311 invoked from network); 3 Apr 2005 00:34:44 -0000 Received: from unknown (HELO nevyn.them.org) (66.93.172.17) by sourceware.org with SMTP; 3 Apr 2005 00:34:44 -0000 Received: from drow by nevyn.them.org with local (Exim 4.50 #1 (Debian)) id 1DHt4d-00061C-TX; Sat, 02 Apr 2005 19:34:44 -0500 Date: Sun, 03 Apr 2005 00:34:00 -0000 From: Daniel Jacobowitz To: Mark Kettenis Cc: gdb-patches@sourceware.org Subject: Re: [RFC] Teach dwarf2-frame.c about StackGhost Message-ID: <20050403003443.GA23039@nevyn.them.org> Mail-Followup-To: Mark Kettenis , gdb-patches@sourceware.org References: <200504022218.j32MIgoQ032738@elgar.sibelius.xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200504022218.j32MIgoQ032738@elgar.sibelius.xs4all.nl> User-Agent: Mutt/1.5.8i X-SW-Source: 2005-04/txt/msg00032.txt.bz2 On Sun, Apr 03, 2005 at 12:18:42AM +0200, Mark Kettenis wrote: > One of the things that still keeps me from enabling the DWARF2 > unwinder on SPARC is the fact that it doesn't play nice with > StackGhost. Here is an attempt to make dwarf2-frame.c deal with it by > introducing yet another register rule. People might object since this > is only sort of architecture independent code. However it seems that > this is the cleanest way to solve this. Ewww... this isn't even vaguely architecture independent code. It seems like it's in the wrong place; there's no reason StackGhost must be restricted to register windows. Here's an alternative that I think is cleaner (and will work... I hope): create a sparc-specific unwinder. Its sniffer can call the dwarf2 sniffer; similarly for this_id and prev_register. Then you can handle the StackGhost cookie when you are requested to unwind the PC. -- Daniel Jacobowitz CodeSourcery, LLC