From: Jakub Jelinek <jakub@redhat.com>
To: Andrew Haley <aph@redhat.com>
Cc: "Hogan, D. (GE Power & Water)" <D.Hogan@ge.com>,
"libffi-discuss@sourceware.org"
<libffi-discuss@sourceware.org>
Subject: Re: RFC: variadic closures in x86/x86_64
Date: Mon, 25 Nov 2013 09:37:00 -0000 [thread overview]
Message-ID: <20131125093715.GU892@tucnak.redhat.com> (raw)
In-Reply-To: <52931854.6080007@redhat.com>
On Mon, Nov 25, 2013 at 09:28:52AM +0000, Andrew Haley wrote:
> On 11/25/2013 02:45 AM, Hogan, D. (GE Power & Water) wrote:
> > I'm requesting feedback on an implementation of variadic closures in
> > libffi. It currently supports x86 and x86_64. This change allows for
> > FMI logging callbacks through JNA in the JFMI[1] and Ptolemy II[2]
> > projects. The libffi changes are in a github branch[3].
>
> Why is this necessary? I thought that the variadic calling conventions
> on x86 were the same as the non-variadic ones.
On x86 they are, on x86_64 they are not (%rax register must contain the
number of floating point varargs arguments AFAIK).
Jakub
next prev parent reply other threads:[~2013-11-25 9:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-25 2:46 Hogan, D. (GE Power & Water)
2013-11-25 9:29 ` Andrew Haley
2013-11-25 9:37 ` Jakub Jelinek [this message]
2013-11-25 10:10 ` Andrew Haley
2013-11-26 14:27 ` Alan Modra
2013-12-04 8:03 ` Hogan, D. (GE Power & Water)
2013-12-04 11:05 ` Philip Ashmore
[not found] ` <F023C084BCC16446BDA5B664305741E8091E8B@ALPMBAPA05.e2k.ad.ge.com>
2013-12-05 13:03 ` Philip Ashmore
2013-12-04 12:21 ` Andrew Haley
2013-12-04 18:28 ` Hogan, D. (GE Power & Water)
2013-12-04 18:51 ` Andrew Haley
2013-12-05 0:47 ` Hogan, D. (GE Power & Water)
2013-12-05 8:33 ` Andrew Haley
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