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[Bug inline-asm/11807] GCC should error out when clobbering the stack pointer and frame pointer
- From: "ncunningham at cyclades dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Aug 2005 11:41:30 -0000
- Subject: [Bug inline-asm/11807] GCC should error out when clobbering the stack pointer and frame pointer
- References: <20030805124527.11807.aw11@os.inf.tu-dresden.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From ncunningham at cyclades dot com 2005-08-23 11:41 -------
Subject: Re: GCC should error out when clobbering
the stack pointer and frame pointer
The function needs to be inlined - the return value especially is
pivotal in the transition from the booted kernel context to the
suspended one. That said, I'm no x86 assembly guru, so there might be a
way around it.
Regards,
Nigel
On Tue, 2005-08-23 at 21:34, pinskia at gcc dot gnu dot org wrote:
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-23 11:34 -------
> (In reply to comment #20)
> > gcc shouldn't always error out in this situation. For suspend to disk, we
> > clobber all registers when restoring the original cpu context after copying back
> > the original kernel context. We could lie to gcc and say we don't clobber the
> > register, but I'd prefer to be honest :>
>
> You know you can use a function to do that and a .s file for that right? You don't need to use an inline-
> asm, right?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11807