Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753665AbbGNVLw (ORCPT ); Tue, 14 Jul 2015 17:11:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60623 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753575AbbGNVLv (ORCPT ); Tue, 14 Jul 2015 17:11:51 -0400 Date: Tue, 14 Jul 2015 16:11:49 -0500 From: Josh Poimboeuf To: Peter Zijlstra Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Michal Marek , Andy Lutomirski , Borislav Petkov , Linus Torvalds , Andi Kleen , Pedro Alves , x86@kernel.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v7 2/4] x86/stackvalidate: Compile-time stack validation Message-ID: <20150714211149.GA13950@treble.redhat.com> References: <20150714205738.GO19282@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20150714205738.GO19282@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1078 Lines: 28 On Tue, Jul 14, 2015 at 10:57:38PM +0200, Peter Zijlstra wrote: > On Tue, Jul 14, 2015 at 12:14:08PM -0500, Josh Poimboeuf wrote: > > This adds a CONFIG_STACK_VALIDATION option which enables a host tool > > named stackvalidate which runs at compile time. It analyzes every .o > > file and ensures the validity of its stack metadata. It enforces a set > > of rules on asm code and C inline assembly code so that stack traces can > > be reliable. > > > > Currently it checks frame pointer usage. I plan to add DWARF CFI > > validation as well. > > Validation or Annotation, as in the generation of DWARF CFI info? My current thinking is I'll do both: - CFI generation for asm code - CFI validation of C code (and possibly asm code too) It's TBD whether the generation will be done by this tool or by a separate tool. -- Josh -- 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/