From: Jeffrey A Law <law@cygnus.com>
To: Craig Burley <burley@gnu.org>
Cc: pcg@goof.com, egcs@cygnus.com
Subject: Re: x86 double alignment (was egcs-1.1 release schedule)
Date: Thu, 25 Jun 1998 18:53:00 -0000 [thread overview]
Message-ID: <29413.898805009@hurl.cygnus.com> (raw)
In-Reply-To: <199806251615.MAA12029@melange.gnu.org>
In message < 199806251615.MAA12029@melange.gnu.org >you write:
> What I haven't looked into yet is whether subtracting 4 from %esp
> before pushing args might upset some varargs/stdargs implementation
> on the callee side (that the caller doesn't know about), i.e. if
> that can even happen.
I'm pretty sure it's safe. Even for varargs/stdarg. Basically think
of it as having an extra int argument at the end of the arglist
(remember we push back to front). An extra argument never hurt anyone :-)
We do have to be careful and make sure we don't screw RETURN_POPS_ARGS
support though. I'd forgotten about that. Though I do not think
that adds any significant complexity to the problem.
jeff
next prev parent reply other threads:[~1998-06-25 18:53 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-06-18 1:32 egcs-1.1 release schedule Jeffrey A Law
1998-06-19 9:02 ` Gerald Pfeifer
1998-06-19 23:47 ` Jeffrey A Law
1998-06-19 11:57 ` Dave Love
1998-06-21 21:43 ` Craig Burley
1998-06-21 23:07 ` Jeffrey A Law
1998-06-22 5:19 ` David S. Miller
1998-06-22 12:04 ` Dave Love
1998-06-22 13:45 ` Toon Moene
1998-06-22 22:29 ` Jeffrey A Law
1998-06-22 18:20 ` ix86 double alignment (was Re: egcs-1.1 release schedule) Craig Burley
1998-06-23 3:32 ` Jeffrey A Law
1998-06-23 5:13 ` Craig Burley
1998-06-23 3:32 ` David S. Miller
1998-06-23 6:30 ` Craig Burley
1998-06-22 12:04 ` egcs-1.1 release schedule Dave Love
1998-06-23 3:32 ` Craig Burley
1998-06-23 3:32 ` Jeffrey A Law
1998-06-23 9:29 ` H.J. Lu
1998-06-24 17:12 ` x86 double alignment (was egcs-1.1 release schedule) Marc Lehmann
1998-06-25 0:25 ` Jeffrey A Law
1998-06-28 18:02 ` Marc Lehmann
1998-06-25 12:33 ` PÃ¥l-Kristian Engstad
1998-06-28 18:02 ` Marc Lehmann
1998-06-25 21:48 ` Craig Burley
1998-06-25 18:53 ` Jeffrey A Law [this message]
1998-06-28 22:41 ` Marc Lehmann
1998-06-29 5:20 ` Martin Kahlert
1998-06-29 11:08 ` Jeffrey A Law
1998-06-29 19:43 ` Craig Burley
1998-06-29 20:41 ` Craig Burley
1998-06-30 0:42 ` Jeffrey A Law
1998-06-30 8:19 ` gcc2 merge H.J. Lu
1998-06-30 19:49 ` Jeffrey A Law
1998-06-30 4:50 ` x86 double alignment (was egcs-1.1 release schedule) Jeffrey A Law
1998-06-22 12:04 ` ix86 `double' alignment (was " Craig Burley
1998-06-23 3:32 ` Jeffrey A Law
1998-06-23 5:13 ` Craig Burley
1998-06-24 2:28 ` Jeffrey A Law
1998-06-24 14:50 ` Craig Burley
1998-06-25 0:25 ` Jeffrey A Law
1998-06-25 9:59 ` Tim Hollebeek
1998-06-28 18:01 ` Marc Lehmann
1998-06-20 6:41 ` egcs-1.1 release schedule Gabriel Dos Reis
1998-06-20 9:22 ` Joe Buck
1998-06-20 15:36 ` Mark Mitchell
1998-06-21 0:07 ` Jeffrey A Law
1998-06-26 7:16 x86 double alignment (was egcs-1.1 release schedule) Michael Meissner
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