[BZ#17090/17620/17621]: fix DTV race, assert, and DTV_SURPLUS Static TLS limit

[Alan Modra]

On Thu, Feb 26, 2015 at 02:44:34AM -0300, Alexandre Oliva wrote:
> On Jan  5, 2015, Alexandre Oliva <aoliva@redhat.com> wrote:
> 
> > On Dec  9, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:
> >> On Nov 21, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:
> >>> No regressions on x86_64-linux-gnu.  Ok to install?
> 
> >> Ping?
> >> https://sourceware.org/ml/libc-alpha/2014-11/msg00590.html
> 
> > Ping?
> 
> Ping?

Thanks for looking into this.  I applied your patch on top of a
revised version of my "tlsdesc" patch for powerpc,
https://sourceware.org/ml/libc-alpha/2010-02/msg00025.html minus the
elf/dlopen.c bits.  My patch alone regresses elf/tst-tls7,
elf/tst-tls8 and nptl/tst-stack4 on powerpc-linux and powerpc64-linux.
With your patch added the first two regressions disappear.

nptl/tst-stack4 fails with segfaults with or without your patch.  :-(
As does nptl/tst-stack4 on x86_64 if tst-stack4mod.so is built with
-mtls-dialect=gnu2.

-- 
Alan Modra
Australia Development Lab, IBM