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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/99759] morestack.S should support .init_array.0 besides
 .ctors.65535
Date: Mon, 05 Apr 2021 00:26:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99759

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-04-05
             Status|UNCONFIRMED                 |WAITING
     Ever confirmed|0                           |1
             Target|                            |i?86-linux-gnu
                   |                            |s390-linux-gnu
                   |                            |rs6000-linux-gnu

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The comment in morestack.S might be just wrong.

# Make __stack_split_initialize a high priority constructor.  FIXME:
# This is ELF specific.
        .section .ctors.65535,"aw",@progbits

So I read the manual and even read the details on the linker script.  The
comment is incorrect really.  The higher number the later it will be.  In t=
his
case it is 64k-1.

So looking at the linker script:
KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*=
)))

this means the ctors.65535 will come last.

I don't see any issue here really in the end because GCC will produce
init_array most of the time.=