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From: "amodra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/99759] morestack.S should support .init_array.0 besides
 .ctors.65535
Date: Thu, 12 Aug 2021 00:39:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99759

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amodra at gmail dot com
             Status|WAITING                     |NEW

--- Comment #2 from Alan Modra <amodra at gmail dot com> ---
> this means the ctors.65535 will come last.
Nope, it will come first.  And since DT_INIT_ARRAY pointers are executed in=
 the
order they appear in the array, it will be one of the first to run.=20
.init_array and .ctors sorting is complicated.  ld.bfd will sort .init_arra=
y.0
(highest priority .init_array section) and .ctors.65535 (highest priority
.ctors section) together.

I assume this comment:
> The input section description is quite close but does not sort .init_arra=
y.* and .ctors.* with the same priority together.
is referring to lld.

> I don't see any issue here really in the end because GCC will produce ini=
t_array most of the time.
So the issue really is that lld doesn't support mixing of .ctors.* and
.init_array.*.

It might be nice for libgcc to use .init_array.0 here instead of .ctors.655=
36
whenever gcc will use .init_array in compiled code.=