Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756321Ab3HFQPS (ORCPT ); Tue, 6 Aug 2013 12:15:18 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:14643 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756289Ab3HFQPO (ORCPT ); Tue, 6 Aug 2013 12:15:14 -0400 X-Authority-Analysis: v=2.0 cv=e9yEuNV/ c=1 sm=0 a=Sro2XwOs0tJUSHxCKfOySw==:17 a=Drc5e87SC40A:10 a=pFOAptgLnqcA:10 a=5SG0PmZfjMsA:10 a=IkcTkHD0fZMA:10 a=meVymXHHAAAA:8 a=KGjhK52YXX0A:10 a=pvQ05lsfB1wA:10 a=InIu05jss1b0TZa58xIA:9 a=QEXdDO2ut3YA:10 a=q_p8DFHK6VYA:10 a=6npnGG9fHNkA:10 a=Sro2XwOs0tJUSHxCKfOySw==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 67.255.60.225 Message-ID: <1375805711.25420.34.camel@gandalf.local.home> Subject: Re: [RFC] gcc feature request: Moving blocks into sections From: Steven Rostedt To: "H. Peter Anvin" Cc: Mathieu Desnoyers , Linus Torvalds , LKML , gcc , Ingo Molnar , Thomas Gleixner , David Daney , Behan Webster , Peter Zijlstra , Herbert Xu Date: Tue, 06 Aug 2013 12:15:11 -0400 In-Reply-To: <52001C92.3070209@linux.intel.com> References: <1375725328.22073.101.camel@gandalf.local.home> <51FFEC56.6040206@linux.intel.com> <1375727010.22073.110.camel@gandalf.local.home> <51FFEEEC.5060902@linux.intel.com> <1375728583.22073.118.camel@gandalf.local.home> <51FFF430.1060701@linux.intel.com> <20130805195446.GA22359@Krystal> <20130805212855.GA23044@Krystal> <52001C92.3070209@linux.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-3 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 590 Lines: 22 On Mon, 2013-08-05 at 14:43 -0700, H. Peter Anvin wrote: > For unconditional jmp that should be pretty safe barring any fundamental > changes to the instruction set, in which case we can enable it as > needed, but for extra robustness it probably should skip prefix bytes. Would the assembler add prefix bytes to: jmp 1f 1: ?? -- Steve -- 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/