[Bug sanitizer/59018] [4.9 Regression] libsanitizer doesn't build for x32

["hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59018

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Kostya Serebryany from comment #5)
> > Can you try
> > 
> >   register void *r8 __asm__ ("r8") = newtls;
> >   register int *r10 __asm__ ("r10") = child_tidptr;
> Yep, works! 
> 
> > But you need to enable x32 first on your OS, which requires
> > 
> > 1. x32 enabled kernel, Linux kernel >= 3.4.0.
> > 2. x32 glibc.
> 
> This does not match my system. :( 
> Do you have a VM image (e.g. for VMWare player) with such a system? 

I can create an x32 VirtualBox image.  Do you have
a place I can upload it for you?

> > 
> > > 
> > > 2. Is there any chance to test x32 off the clang tree, so that we keep the
> > > upstream tree x32-clean all the time?
> > 
> > There was x32 port of llvm/clang last year.  But only parts
> > of the x32 patches have been merged with llvm.
> 
> Do you need help with this?

Yes, please.  I'd like to work with something to get
x32 support into llvm/clang.


> I'll be on the LLVM dev meeting today and tomorrow, may at least ask around.