Bug 205663 Clang getting Bus Errors (arm SCLTR Bit[12]==1 context): Reported fixed on llvm's trunk

[Ian Lepore]

On Tue, 2016-01-05 at 11:35 -0700, Warner Losh wrote:
> On Tue, Jan 5, 2016 at 11:27 AM, Mark Millard <markmi at dsl-only.net>
> wrote:
> 
> > llvm.org's Bugzilla reports that clang trunk has been fixed and
> > clang 3.8
> > will contain the fixes:
> > 
> > James Molloy changed bug 25958
> > What    Removed Added
> > Status  NEW     RESOLVED
> > Resolution      ---     FIXED
> > Comment # 8 on bug 25958 from James Molloy
> > Hi Mark,
> > 
> > Thanks for your detailed investigation. I can confirm that this is
> > fixed on
> > trunk and therefore will be fixed for LLVM 3.8.
> > 
> > The fixes were done for SPARC, which requires strict accesses much
> > as ARM
> > does
> > with SCTLR=1.
> > 
> > There was a sequence of commits by James Knight that fixed these,
> > but an
> > example is http://reviews.llvm.org/rL242554 .
> > 
> > The fixes were in a similar vein to yours, but required changes in
> > fewer
> > places
> > and there were a few more sticky issues to solve too. I'll CC James
> > here in
> > case he wants to comment on the current state of the clang codebase
> > for
> > self-hosting in a strict alignment environment.
> > 
> > Cheers,
> > 
> > James
> > 
> 
> There's a projects/clang-380-import that you might want to try...

It's a non-starter for us, because unfortunately they appear to have
removed support for the -arm-use-movt=0 command line option, so now we
can't build ubldr or kernel modules.

-- Ian