From owner-freebsd-arm@freebsd.org Tue Jan 5 18:54:01 2016 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 122FEA624E3 for ; Tue, 5 Jan 2016 18:54:01 +0000 (UTC) (envelope-from ian@freebsd.org) Received: from pmta2.delivery6.ore.mailhop.org (pmta2.delivery6.ore.mailhop.org [54.200.129.228]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E94C41860 for ; Tue, 5 Jan 2016 18:54:00 +0000 (UTC) (envelope-from ian@freebsd.org) Received: from ilsoft.org (unknown [73.34.117.227]) by outbound2.ore.mailhop.org (Halon Mail Gateway) with ESMTPSA; Tue, 5 Jan 2016 18:54:27 +0000 (UTC) Received: from rev (rev [172.22.42.240]) by ilsoft.org (8.14.9/8.14.9) with ESMTP id u05IrqIF001652; Tue, 5 Jan 2016 11:53:52 -0700 (MST) (envelope-from ian@freebsd.org) Message-ID: <1452020032.1320.21.camel@freebsd.org> Subject: Re: Bug 205663 Clang getting Bus Errors (arm SCLTR Bit[12]==1 context): Reported fixed on llvm's trunk From: Ian Lepore To: Warner Losh , Mark Millard Cc: freebsd-arm , FreeBSD Toolchain Date: Tue, 05 Jan 2016 11:53:52 -0700 In-Reply-To: References: Content-Type: text/plain; charset="us-ascii" X-Mailer: Evolution 3.16.5 FreeBSD GNOME Team Port Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jan 2016 18:54:01 -0000 On Tue, 2016-01-05 at 11:35 -0700, Warner Losh wrote: > On Tue, Jan 5, 2016 at 11:27 AM, Mark Millard > wrote: > > > llvm.org's Bugzilla reports that clang trunk has been fixed and > > clang 3.8 > > will contain the fixes: > > > > James Molloy changed bug 25958 > > What Removed Added > > Status NEW RESOLVED > > Resolution --- FIXED > > Comment # 8 on bug 25958 from James Molloy > > Hi Mark, > > > > Thanks for your detailed investigation. I can confirm that this is > > fixed on > > trunk and therefore will be fixed for LLVM 3.8. > > > > The fixes were done for SPARC, which requires strict accesses much > > as ARM > > does > > with SCTLR=1. > > > > There was a sequence of commits by James Knight that fixed these, > > but an > > example is http://reviews.llvm.org/rL242554 . > > > > The fixes were in a similar vein to yours, but required changes in > > fewer > > places > > and there were a few more sticky issues to solve too. I'll CC James > > here in > > case he wants to comment on the current state of the clang codebase > > for > > self-hosting in a strict alignment environment. > > > > Cheers, > > > > James > > > > There's a projects/clang-380-import that you might want to try... It's a non-starter for us, because unfortunately they appear to have removed support for the -arm-use-movt=0 command line option, so now we can't build ubldr or kernel modules. -- Ian