Closed requested to merge wip/T22497 into master
It turns out that gmp 6.2.1 uses the platform-reserved
x18 register on
AArch64/Darwin. This was fixed in upstream
which was merged in 2020. Here I backport this patch although I do hope
that a new gmp release is forthcoming soon.
Fixes #22497 (closed).
Additionally, this includes a backport of the fix for CVE-2021-43618, fixing #22789 (closed).