From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14723 invoked by alias); 15 Sep 2008 21:15:25 -0000 Received: (qmail 14712 invoked by uid 22791); 15 Sep 2008 21:15:24 -0000 X-Spam-Check-By: sourceware.org Received: from NaN.false.org (HELO nan.false.org) (208.75.86.248) by sourceware.org (qpsmtpd/0.31) with ESMTP; Mon, 15 Sep 2008 21:14:45 +0000 Received: from nan.false.org (localhost [127.0.0.1]) by nan.false.org (Postfix) with ESMTP id EBCD010CEF; Mon, 15 Sep 2008 21:14:43 +0000 (GMT) Received: from caradoc.them.org (22.svnf5.xdsl.nauticom.net [209.195.183.55]) by nan.false.org (Postfix) with ESMTP id CEF4810CEB; Mon, 15 Sep 2008 21:14:43 +0000 (GMT) Received: from drow by caradoc.them.org with local (Exim 4.69) (envelope-from ) id 1KfLP9-00087X-75; Mon, 15 Sep 2008 17:14:43 -0400 Date: Mon, 15 Sep 2008 21:15:00 -0000 From: Daniel Jacobowitz To: Michael Snyder Cc: "gdb-patches@sourceware.org" , teawater Subject: Re: [reverse RFA] no singlestep-over-BP in reverse Message-ID: <20080915211443.GB30767@caradoc.them.org> Mail-Followup-To: Michael Snyder , "gdb-patches@sourceware.org" , teawater References: <48CEAA05.8050006@vmware.com> <20080915184245.GA21388@caradoc.them.org> <48CEB1F5.6080902@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48CEB1F5.6080902@vmware.com> User-Agent: Mutt/1.5.17 (2008-05-11) X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2008-09/txt/msg00342.txt.bz2 On Mon, Sep 15, 2008 at 12:05:25PM -0700, Michael Snyder wrote: >> If there is a breakpoint on the previous instruction, will you hit it >> before or after de-executing that instruction? > > Well, if trap insns are in place, that's what will be > executed (not the shadow insn). Presumably it'd be a hardware breakpoint. Software breakpoints in reverse execution seem... awkward. -- Daniel Jacobowitz CodeSourcery