From owner-freebsd-mips@FreeBSD.ORG Wed Jun 2 14:41:31 2010 Return-Path: Delivered-To: freebsd-mips@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5F6FB1065675; Wed, 2 Jun 2010 14:41:31 +0000 (UTC) (envelope-from c.jayachandran@gmail.com) Received: from mail-pz0-f175.google.com (mail-pz0-f175.google.com [209.85.222.175]) by mx1.freebsd.org (Postfix) with ESMTP id 2A1E08FC12; Wed, 2 Jun 2010 14:41:30 +0000 (UTC) Received: by pzk5 with SMTP id 5so3407069pzk.14 for ; Wed, 02 Jun 2010 07:41:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=tP09f1wKyR33JDGw95pvhD7mEQkfUTcz4OZ4Ud/a7+M=; b=igIkPg2HGu5OC8uw2E3BvRI9Q1n+37H/3rHM2kkMRBmyRQZN0HqNVLo7HPtbOqlLh2 NcPUtnuKjNKK/txMaEl6ng6brrLM+RevYpwnVclwXTHtPQo94WDOixrXd+MHGWwT+KHG hLHX2L3FHsOexhHhcnsjCCG9rgSJzdym9xYgs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=wptEIrZ/yw5TmHCiPmgbCZQS/UhQ7V/S4tL/FVUmvrs2mf+NeeHt7T8k/QR2kL9dx5 Z7pbrGD6wvU3YRB0dDL0k3WzunXmvm4ywiq4cE/TxV945IGrakyie2apfHDWVDfiKRne HcPa8QisSkp32Ro9SAdlD31JgIL96gpxgYKIs= MIME-Version: 1.0 Received: by 10.140.248.8 with SMTP id v8mr6493575rvh.9.1275489690595; Wed, 02 Jun 2010 07:41:30 -0700 (PDT) Received: by 10.141.4.3 with HTTP; Wed, 2 Jun 2010 07:41:30 -0700 (PDT) In-Reply-To: <20100602.073644.695112013731480233.imp@bsdimp.com> References: <20100602.073644.695112013731480233.imp@bsdimp.com> Date: Wed, 2 Jun 2010 20:11:30 +0530 Message-ID: From: "C. Jayachandran" To: "M. Warner Losh" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-mips@freebsd.org Subject: Re: HEADS UP: Toolchain changes coming soon. (Octeon, n32, n64) X-BeenThere: freebsd-mips@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to MIPS List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Jun 2010 14:41:31 -0000 On Wed, Jun 2, 2010 at 7:06 PM, M. Warner Losh wrote: > In message: > =A0 =A0 =A0 =A0 =A0 =A0"C. Jayachandran" write= s: > : On Tue, Jun 1, 2010 at 2:53 PM, Juli Mallett wro= te: > : > On Tue, Jun 1, 2010 at 02:17, C. Jayachandran wrote: > : >> That clears it up, thanks. =A0Looking at the patch, most of the chan= ges > : >> seems to be in binutils, are these from a specific version of > : >> binutils? =A0I am asking because I'm not sure how the FreeBSD toolch= ain > : >> is synchronized across architectures - are all architectures at the > : >> same version of binutils, or can each architecture decide to update > : >> its part of the tool-chain. > : > > : > I pulled some files from a slightly more modern version of binutils > : > from a Cavium SDK than ours and reduced differences to make the > : > relevant parts of code match the older binutils API we provide, while > : > still providing the newer opcode interface and a couple of nearby > : > things. > : > > : >>> Is there specific functionality you need in GCC? > : >> > : >> Netlogic has some updates for GCC and binutils in its SDK. But they > : >> are not critical, and we have not merged these into the FreeBSD. =A0= I > : >> was not sure if I can get these changes into FreeBSD directly. > : > > : > If Netlogic can GPLv2 their specific changes or reimplement them > : > relative to FreeBSD's toolchain, I think we would want to coordinate > : > to get them into the tree. =A0Our goal is generally to produce a > : > fully-working self-hosting system out of the box. =A0That may change = at > : > some point, especially if Warner's work on supporting external > : > toolchains better pans out well, but I think for now it's a reasonabl= e > : > goal. > : > : Stock binutils and GCC works fine for XLR (it is mips64 compliant), so > : XLR is self-hosting with the current FreeBSD MIPS tool-chain. =A0Our > : patch for GCC is for adding 'xlr' machine description and march/mtune > : options. The binutils patch is for a few XLR specific instructions for > : which we currently '.word' in assembly for. =A0So both of these are not > : really needed. > : > : Also licensing should not be an issue here - =A0I'll have a go at this > : once the other toolchain changes are in. > : > : > Note that my understanding is that David O'Brien is working on > : > bringing in the last GPLv2 binutils which will make the differences > : > required for mips64r2 and Octeon substantially-smaller and I would > : > hope for Netlogic processors as well. > > One thing that I'm told, but haven't verified, is that the binutils > from the XLR SDK breaks other mips platforms in subtle ways. =A0Based on > this assertion, I think it would be prudent to carefully review and > test any proposed patches from that SDK. Our gcc and binutils patches are in the latest releases (IIRC - GCC went in about 4.4 and binutils patches are in 2.20), so it has gone thru some testing. JC.