From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/10125 Path: news.gmane.org!not-for-mail From: Szabolcs Nagy Newsgroups: gmane.linux.lib.musl.general Subject: Re: build musl for armv7m Date: Tue, 14 Jun 2016 18:32:52 +0200 Message-ID: <20160614163252.GQ22574@port70.net> References: <805971fb5f9b1ee12edab9b7f3e86114@codeaurora.org> <20160614130036.GD10893@brightrain.aerifal.cx> <4858c023-2689-cec7-5335-15c33b8c8b92@codeaurora.org> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1465922542 2893 80.91.229.3 (14 Jun 2016 16:42:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 14 Jun 2016 16:42:22 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-10138-gllmg-musl=m.gmane.org@lists.openwall.com Tue Jun 14 18:42:13 2016 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1bCrH5-0006gd-RQ for gllmg-musl@m.gmane.org; Tue, 14 Jun 2016 18:33:11 +0200 Original-Received: (qmail 7210 invoked by uid 550); 14 Jun 2016 16:33:04 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Original-Received: (qmail 7185 invoked from network); 14 Jun 2016 16:33:04 -0000 Mail-Followup-To: musl@lists.openwall.com Content-Disposition: inline In-Reply-To: <4858c023-2689-cec7-5335-15c33b8c8b92@codeaurora.org> User-Agent: Mutt/1.5.24 (2015-08-30) Xref: news.gmane.org gmane.linux.lib.musl.general:10125 Archived-At: * Zhao, Weiming [2016-06-14 09:12:17 -0700]: > I haven't did a full test as the functions I modified are not actually being > used. > > It is a bare-metal environment, using clang to compile. > > Main flags are -mcpu=cortex-m3 -Os -fdata-sections -ffunction-sections > -mno-unaligned-access > > Could you please let me know the gas option? > -mimplicit-it=always https://sourceware.org/binutils/docs/as/ARM-Options.html > Thanks, > > Weiing > > On 6/14/2016 6:00 AM, Rich Felker wrote: > >On Tue, Jun 14, 2016 at 01:49:40AM -0700, weimingz@codeaurora.org wrote: > >>Hi, > >> > >>I'm building MUSL with -mcpu=cortex-m3. There are a few .s files > >>that cannot be assembled because: (1) use predicated instructions > >>without IT instr (2) use sp inside reg list in ldmia/stmia. > >> > >>Please help to review the attached patch. > >Did you test anything? These patches do not result in working code; > >they just make it assemble without errors. There's already a gas > >option to automatically add IT instructions where needed for > >thumb-only targets, but that's not the only thing needed to support > >thumb-only/cortex-m. I'd be interested in knowing more about the setup > >you're trying to target. Is it Linux or bare-metal? If Linux, are you > >going to use the ARM/FDPIC toolchain & kernel mods? I'm about to leave > >at the moment but I'll follow up with a more detailed review of your > >patch later. > > > >>Also, is there any easy way of disabling string/arm/memcpy_le.S ? > >>For baremetal, unaligned access may be unavailable. > >That file does not perform any unaligned access. It should work on any > >EABI-supported version of the arm instruction set. > > > >Rich > > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation