Date: Tue, 27 Aug 2019 12:18:28 -0500 From: Kyle Evans <kevans@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Mori Hiroki <yamori813@yahoo.co.jp>, freebsd-mips@freebsd.org, Ed Maste <emaste@freebsd.org> Subject: Re: gcc 4.2.1 will delete Message-ID: <CACNAnaHUfSdSj_Q=rGcmWiqM8gBBk8NLNkesBfwgBNQEe65YGg@mail.gmail.com> In-Reply-To: <CACNAnaFDc3-ta8ixtf8TyjOQcsx2xP9W2iP-s4c21jw7GxkeQA@mail.gmail.com> References: <441318706.278852.1566618835359.JavaMail.yahoo.ref@jws705006.mail.kks.yahoo.co.jp> <441318706.278852.1566618835359.JavaMail.yahoo@jws705006.mail.kks.yahoo.co.jp> <CANCZdfrxexQ=_oL4ewaP5=wn8%2BDA%2BkmAuD6H9t%2BK=K65WnBGuA@mail.gmail.com> <CACNAnaFDc3-ta8ixtf8TyjOQcsx2xP9W2iP-s4c21jw7GxkeQA@mail.gmail.com>
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On Tue, Aug 27, 2019 at 11:59 AM Kyle Evans <kevans@freebsd.org> wrote: > > (CC'ing emaste@ as well, because this is a bit of a status report) > > On Fri, Aug 23, 2019 at 11:01 PM Warner Losh <imp@bsdimp.com> wrote: > > > > On Fri, Aug 23, 2019, 9:54 PM Mori Hiroki <yamori813@yahoo.co.jp> wrote: > > > > > Hi > > > > > > gcc 4.2.1 will delete. > > > > > > How about go mips architecture ? > > > > > > https://reviews.freebsd.org/rS351429 > > > > > > There is good support for an external toolchain today. Clang has some > > support, but it works a lot better in llvm 9.0, which is due in about a > > month. > > > > Warner > > > > I have the following open work for mips32 w/ in-tree llvm (and llvm90 > has the same issues for some of them): > - https://reviews.freebsd.org/D21435 (_mcount needs to be explicitly > placed in .text; clang will emit ".section .mdebug.abi32" before > everything else so _mcount ends up in it -- I don't think we can > really blame clang, we probably should've specified) > > - https://people.freebsd.org/~kevans/mips-llvm.diff (.eh_frame ends up > with some relocations we can't have in non-writable section; dirty > dirty hack to make .eh_frame writable in clang and making sure the > synthetic section that lld produces is also writable [this part's even > dirtier than the first]) > > - https://people.freebsd.org/~kevans/mips-opts.diff (fusefs tests > currently hang and I haven't had time to figure out why or try and > reproduce it against llvm90; the rest of the diff is simply enabling > full LLVM/LLD world) > > With these three I can make build and install a world w/ MALTA kernel, > all otherwise modified, and things generally work except kldxref: > > Building /boot/kernel/linker.hints > kldxref: /boot/kernel/kernel: too many segments > > root@:~ # uname -a > FreeBSD 13.0-CURRENT FreeBSD 13.0-CURRENT #0 > b101f7f4b1d-c262228(mips-llvm)-dirty: Tue Aug 27 09:42:00 CDT 2019 > root@viper.audeuro.com:/usr/obj/usr/src/mips-llvm/sys/MALTA mips > > Next step, I'll fudge this into freebsd-wifi-build and test it on the > hardware in my test lab... > I almost forgot this one: - https://people.freebsd.org/~kevans/mips-csu.diff I pulled a .cprestore directive out of thin air because, AFAICT, it really doesn't matter. We do similar hijinks in ^/sys/mips/include/profile.h, apparently, in MCOUNT.
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