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Re: i386 stack missalignment on main
- To: Joern Rennecke <amylaar at redhat dot com>
- Subject: Re: i386 stack missalignment on main
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 31 Jul 2001 01:57:09 -0300
- Cc: jh at suse dot cz (Jan Hubicka), rth at redhat dot com (Richard Henderson), gcc at gcc dot gnu dot org, aj at suse dot de, gcc-patches at gcc dot gnu dot org
- Organization: GCC Team, Red Hat
- References: <200107310453.f6V4r1n09199@phal.cambridge.redhat.com>
On Jul 31, 2001, Joern Rennecke <amylaar@redhat.com> wrote:
> P.S.: Another way would be, at the start of the function, to push the
> old stack pointer, and if alignment requires and adjustment, memmove
> all the arguemnts in the stack and the saved stack pointer to fit with
> the adjusted stack pointer.
> So no extra register is required.
This assumes you know the length of the arguments. Sometimes
(think varargs), you don't.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
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