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Date:      Sun, 19 Nov 2017 23:47:48 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-toolchain@FreeBSD.org
Subject:   [Bug 223752] clang __attribute__((constructor)) gets wrong input parameters
Message-ID:  <bug-223752-29464-tq7jXx04Zo@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-223752-29464@https.bugs.freebsd.org/bugzilla/>
References:  <bug-223752-29464@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D223752

--- Comment #6 from Mark Millard <markmi@dsl-only.net> ---
(In reply to dstaesse from comment #4)

Also: in looking around I find that every
official webpage/document about this that
shows examples shows functions with no
arguments. (But none that I found has any
explicit words about the argument list
requirements. None say that the arguments
are the same as for any standard variation
for how main can be declared.)

For a stack architecture, there would be stack
pushes set up before the calls and pops set
up after the calls. In architectures with
some degree of register-based argument passing
it is harder to see what has a
garbage-in/garbage-out/accidental status vs.
what is deliberate.

It looks to me like the existing documentation
could stand an update about parameters and
arguments.

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