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Subject: [Bug 223752] clang __attribute__((constructor)) gets wrong input
 parameters
Date: Mon, 20 Nov 2017 02:47:36 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D223752

--- Comment #19 from Mark Millard <markmi@dsl-only.net> ---
(In reply to dstaesse from comment #18)

You are welcome.

My guess is that this is outside POSIX completely and
is just ABI material for what you are doing.

In fact, looking around I found an ARM document
indicating an empty parameter list for its
.init_array context:

 Each translation unit provides a fragment of the constructor vector in an =
ELF
section called .init_array of type SHT_INIT_ARRAY (=3D0xE) and section flags
SHF_ALLOC + SHF_WRITE.

 Each element of the vector contains the address of a function of type exte=
rn
=E2=80=9CC=E2=80=9D void (* const)(void) that, when called, performs part o=
r all of the global
object construction for the translation unit. Producers must treat .init_ar=
ray
sections as if they were read-only.

( http://infocenter.arm.com/help/topic/com.arm.doc.ihi0041e/IHI0041E_cppabi=
.pdf
page 19 of 24.)

So, not portable across all ABIs that have .init_array .

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