[Bug libgcc/85334] Shadow stack isn't unwound properly through signal handler

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85334

--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #12)
> Fixed for GCC 10, GCC 9.3 and GCC 8.4.

The fix is in GCC 8.5, not GCC 8.4.