[PATCH 2/N, MPX, x86_64] Intel MPX support in glibc for x86_64

[Ondřej Bílka]

On Tue, Mar 18, 2014 at 02:22:40PM +0000, Zamyatin, Igor wrote:
> Hi All!
> 
> Attached patch continues (see the beginning here - http://sourceware.org/ml/libc-alpha/2014-03/msg00491.html) adding support for Intel MPX in Glibc for x86_64. Current change performs storing and restoring of bound registers before and after _dl_profile_fixup call.
> 
> Is it ok to install?
>
This part looks ok. Do these matter also in lazy tls resolving, see
sysdeps/x86_64/dl-tlsdesc.S

I had patch to unify these so I could rehash it. 
 
> 2014-03-18  Igor Zamyatin  <igor.zamyatin@intel.com>
> 
> 	* sysdeps/x86_64/bits/link.h (La_x86_64_regs): Add lr_bnd.
> 	(La_x86_64_retval): Add lrv_bnd0 and lrv_bnd1.
> 	* sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Add preserving
> 	of the Intel MPX bound registers before call of _dl_profile_fixup.
> 	* sysdeps/x86_64/dl-trampoline.h: Add restoring of the Intel MPX bound
> 	registers after call of _dl_profile_fixup.