From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id 22F5EE00BBF; Tue, 16 Oct 2018 19:26:14 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, * medium trust * [198.47.19.141 listed in list.dnswl.org] * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's * domain * -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature * 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily * valid Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id E3BD6E00B6C for ; Tue, 16 Oct 2018 19:26:12 -0700 (PDT) Received: from dflxv15.itg.ti.com ([128.247.5.124]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id w9H2QBxw100786; Tue, 16 Oct 2018 21:26:11 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1539743171; bh=lkwwPQNmySfDPowrLpHqkvqplyHIia8W16prCb6unY8=; h=Date:From:To:CC:Subject:References:In-Reply-To; b=WQmiymvbPYNuVrZ2F37UOb0WP2GQ27WZZxl7DuHbJbep5DLHC2jrAyXSPjEPzy81C a0aq+e/hHcoST1CgJGz7O4ABjdYgw3cEO+lSjE5HqS8qoLh79hmR87TgbGlxzctOaZ f+RUK6yubjMJdrPdLFrXDWq0su9erZovA3uUWMEs= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w9H2QB1l027456; Tue, 16 Oct 2018 21:26:11 -0500 Received: from DLEE109.ent.ti.com (157.170.170.41) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Tue, 16 Oct 2018 21:26:11 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Tue, 16 Oct 2018 21:26:10 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w9H2QBg1027484; Tue, 16 Oct 2018 21:26:11 -0500 Date: Tue, 16 Oct 2018 22:26:11 -0400 From: Denys Dmytriyenko To: Khem Raj Message-ID: <20181017022610.GA4031@beryl> References: <20181014192417.GB20670@beryl> <20181016164210.GI1032@bill-the-cat> <20181016182859.GI14250@beryl> <20181016190045.GL14250@beryl> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Cc: meta-ti@yoctoproject.org, Tom Rini Subject: Re: [PATCH] beaglebone.conf: temporarily use generic am335x_evm_config for U-boot X-BeenThere: meta-ti@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-ti layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Oct 2018 02:26:14 -0000 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline On Tue, Oct 16, 2018 at 02:19:36PM -0700, Khem Raj wrote: > On Tue, Oct 16, 2018 at 12:20 PM Khem Raj wrote: > > > > On Tue, Oct 16, 2018 at 12:00 PM Denys Dmytriyenko wrote: > > > > > > On Tue, Oct 16, 2018 at 11:50:36AM -0700, Khem Raj wrote: > > > > On Tue, Oct 16, 2018 at 11:29 AM Denys Dmytriyenko wrote: > > > > > > > > > > On Tue, Oct 16, 2018 at 11:11:36AM -0700, Khem Raj wrote: > > > > > > On Tue, Oct 16, 2018 at 9:42 AM Tom Rini wrote: > > > > > > > > > > > > > > On Sun, Oct 14, 2018 at 10:07:45PM -0700, Khem Raj wrote: > > > > > > > > On Sun, Oct 14, 2018 at 12:24 PM Denys Dmytriyenko wrote: > > > > > > > > > > > > > > > > > > On Sat, Oct 13, 2018 at 01:17:12AM -0700, Khem Raj wrote: > > > > > > > > > > On Fri, Oct 12, 2018 at 8:00 PM Denys Dmytriyenko wrote: > > > > > > > > > > > > > > > > > > > > > > There have been reports recently that am335x_beaglebone_config generates bad SPL. > > > > > > > > > > > Until that is debugged and fixed, use generic am335x_evm_config that covers all > > > > > > > > > > > AM335x platforms, including BeagleBone variants. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > it fails to link > > > > > > > > > > > > > > > > > > > > | arm-yoe-linux-gnueabi-ld.bfd: u-boot-spl section `.rodata' will not > > > > > > > > > > fit in region `.sram' > > > > > > > > > > | arm-yoe-linux-gnueabi-ld.bfd: region `.sram' overflowed by 5772 bytes > > > > > > > > > > | make[2]: *** [/mnt/a/yoe/build/tmp/work/beaglebone-yoe-linux-gnueabi/u-boot-ti-staging/2018.01+gitAUTOINC+2cc52408bf-r24/git/scripts/Makefile.spl:349: > > > > > > > > > > spl/u-boot-spl] Error 1 > > > > > > > > > > > > > > > > > > FWIW, just built u-boot-ti-staging with gcc7 and gcc8 from oe-core, as well as > > > > > > > > > Linaro gcc7 - no problems. > > > > > > > > > > > > > > > > My distro inherits poky policies, and on master it now inherits > > > > > > > > hardening policies ( security flags) by defaults > > > > > > > > do you happen to test poky ? > > > > > > > > > > > > > > I think we want to take a look at which of the security flags really > > > > > > > make sense to use in this context. Thanks! > > > > > > > > > > > > > > > > > > > there could be more to it, since the distro uses thumb2 ISA by > > > > > > default, I am not sure > > > > > > if u-boot overrides that and builds using arm mode ISA always but > > > > > > something to consider, I saw several reports about u-boot overflowing > > > > > > sram sections and most of > > > > > > the solutions were "oh it works for me" or at the best your toolchain > > > > > > is different then mine. here is mine use it and move on. > > > > > > > > > > Khem, > > > > > > > > > > Well, FWIW, Tom and I are very familiar with this issue. As a matter of fact, > > > > > I first encountered it almost 2 years ago and had to prove there's such an > > > > > issue, because everyone was saying it works for them, something must be wrong > > > > > with my OE builds... :) > > > > > > > > > > While .sram region is very limited, the issue is exacerbated by the fact that > > > > > all debug symbols from macros like __FILE__ are ended up in that section as > > > > > well. So, the longer your build path, the larger the section becomes. Once I > > > > > had instructions to reproduce the failure here internally with a series of > > > > > long-named nested directories like aaaaaa and bbbbbb, Nishanth started this > > > > > thread on U-boot mailing list: > > > > > https://lists.denx.de/pipermail/u-boot/2017-March/285031.html > > > > > > > > > > We've had the corresponding bug open internally all this time, while adding > > > > > workarounds to limit .sram section size by other means, like disabling some > > > > > options to reduce the code size. Your patch is one of those workarounds... > > > > > > > > > > But we've been patiently waiting for the following feature to come into gcc to > > > > > fix the issue properly: > > > > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70268 > > > > > > > > > > Since it's now part of gcc8, we should be able to use it. Not sure how to keep > > > > > gcc7 backward compatibility though... > > > > > > > > dumping absolute file name strings into SPL seems a waste of space to > > > > me, but I will leave that out for now. Moreover it exposes build paths > > > > into binaries that user may not be interested to share > > > > > > > > -ffile-prefix-map has been in OE toolchains since gcc6 and I think we > > > > are already using it for kernel builds. We can probably enhance uboot > > > > recipes in OE-Core to > > > > use this option if compiler supports it. That solves my problem. > > > > > > Yeah, extending that from kernel to u-boot would be nice. > > > Unfortunately, our products use Linaro gcc7 on rocko for now. Planning to > > > migrate to gcc8 on thud soon... > > > > we can check for the option before using it so atleast it will not > > break older toolchains more than what they are already broken. > > I added -ffile-prefix-map locally just with this option added it did > not fix the problem. I also tried adding -ffile-prefix-map locally and it only shaved off less than 500 bytes. Still wondering what those extra 5KB of code are...