Date: Sun, 10 Jan 2016 13:42:07 +0100 From: "Ronald Klop" <ronald-lists@klop.ws> To: freebsd-arm@freebsd.org Subject: Re: Bug 205663 Clang getting Bus Errors (arm SCLTR Bit[12]==1 context): Reported fixed on llvm's trunk Message-ID: <op.ya0v8h04kndu52@53555a16.cm-6-6b.dynamic.ziggo.nl> In-Reply-To: <1452365750.1523.9.camel@freebsd.org> References: <C90F0ABA-3C59-4FE1-AAB4-99F8FF32FB24@dsl-only.net> <CANCZdfoWDg_ZX8zxqRV2-Q6teYf_Ef4f3VKB0fhb0sikcW3hUA@mail.gmail.com> <1452020032.1320.21.camel@freebsd.org> <7EE8F65E-7485-4FA9-A136-F22090DB107F@FreeBSD.org> <92264003-CF0E-4624-A28A-8AFB7C663BFB@dsl-only.net> <39774562-F76E-41E9-85E7-ABE257B013D6@FreeBSD.org> <1452365750.1523.9.camel@freebsd.org>
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On Sat, 09 Jan 2016 19:55:50 +0100, Ian Lepore <ian@freebsd.org> wrote: > On Sat, 2016-01-09 at 15:03 +0100, Dimitry Andric wrote: >> On 09 Jan 2016, at 04:46, Mark Millard <markmi@dsl-only.net> wrote: >> > >> > On 2016-Jan-7, at 2:57 PM, Dimitry Andric <dim at FreeBSD.org> >> > wrote: >> ... >> > > FYI, I have added a -mno-movt option for this purpose upstream, >> > > and >> > > imported a newer snapshot into the clang380-import branch. As of >> > > r293384, it now uses the new option spelling for modules, if your >> > > clang >> > > is 3.8.0 or higher. >> > > >> > > -Dimitry >> > >> > I've not been able to get to the point of running clang++ 3.8 on >> > the rpi2 yet: R_ARM_CALL and R_ARM_JUMP24 relocation truncations >> > during the cross build's buildworld interfere. >> >> Yes, this is caused by too large call distances. In other words, the >> clang executable is getting to big to link. Apparently we need to do >> some tricks with -mlongcall to fix this. As I am no arm expert, I >> welcome any patch submissions. :-) >> >> -Dimitry >> > > Here's the patch I got from Andy for the clang380 branch, modified with > Warner's suggestion to use MACHINE_CPUARCH instead of MACHINE. With > this I can get a working arm world that will build a runnable > helloworld.c (and .cc) on a dreamplug. (I.e., it appears clang 3.8.0 > fixes the problem we had with clang 3.7.x where it wouldn't run at all Yeah! :-) > on armv4/5 systems). I have not tried compling anything complex yet. > > -- Ian
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