[PATCH v3 9/9] Use libc_ifunc macro for siglongjmp, longjmp in libpthread.

[Florian Weimer]

On 08/24/2016 04:04 PM, Stefan Liebler wrote:
> This patch uses the libc_ifunc macro to create already existing ifunc functions
> longjmp_ifunc, siglongjmp_ifunc if HAVE_IFUNC is defined.
> The s390 pt-longjmp.c includes the common pt-longjmp.c and uses strong_alias
> to create the longjmp, siglongjmp symbols for glibc version 2.19.
>
> ChangeLog:
>
> 	* nptl/pt-longjmp.c (DEFINE_LONGJMP): Use libc_ifunc macro.
> 	* sysdeps/unix/sysv/linux/s390/pt-longjmp.c (longjmp, siglongjmp):
> 	Use strong_alias to create symbols for glibc verison 2.19.

This is okay for now.

Once this is in, I'm going to submit a patch which replaces the IFUNC 
resolver with a direct call (similar to what we did for fork) because of 
the relocation ordering issue that can cause those IFUNC resolvers to go 
wrong.

Thanks,
Florian