[Bug libc/28532] powerpc64[le]: CFI for assembly templated syscalls is incorrect

["msc at linux dot ibm.com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28532

Matheus Castanho <msc at linux dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|REOPENED                    |RESOLVED

--- Comment #4 from Matheus Castanho <msc at linux dot ibm.com> ---
New failing tests are now fixed by:

commit ae91d3df24a4a1b1f264d101a71a298bff310d14
Author: Matheus Castanho <msc@linux.ibm.com>
Date:   Wed Dec 1 11:14:40 2021 -0300

    powerpc64[le]: Allocate extra stack frame on syscall.S

    The syscall function does not allocate the extra stack frame for scv like
other
    assembly syscalls using DO_CALL_SCV. So after commit d120fb9941 changed the
    offset that is used to save LR, syscall ended up using an invalid offset,
    causing regressions on powerpc64. So make sure the extra stack frame is
    allocated in syscall.S as well to make it consistent with other uses of
    DO_CALL_SCV and avoid similar issues in the future.

    Tested on powerpc, powerpc64, and powerpc64le (with and without scv)

    Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>

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