From: Andi Kleen <andi@firstfloor.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Gautam Singaraju <gautam.singaraju@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: syscall macro fails upon compilation
Date: 06 Jul 2007 13:53:41 +0200 [thread overview]
Message-ID: <p73r6nl21fe.fsf@bingen.suse.de> (raw)
In-Reply-To: <468D6D1F.4040008@zytor.com>
"H. Peter Anvin" <hpa@zytor.com> writes:
> Gautam Singaraju wrote:
> > I use the _syscall0 macro.
>
> Don't. The _syscall*() macros have been unsupported for ages,
That's not true. I supported them on x86 before they were removed against
my objections.
> and broken for ever longer.
Well, most syscall() versions get 6 argument calls wrong
(not sure if that is finally fixed). _syscall*() didn't support
-fPIC for larger argument counts (_syscall0-2 never had a problem)
So all alternatives short of writing your own stub had various
issues. If you needed 6 argument calls _syscall* was typically
the best alternative.
-Andi
next prev parent reply other threads:[~2007-07-06 10:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-05 22:09 Gautam Singaraju
2007-07-05 22:13 ` H. Peter Anvin
2007-07-06 11:53 ` Andi Kleen [this message]
2007-07-06 15:55 ` Gautam Singaraju
2007-07-06 16:12 ` H. Peter Anvin
2007-07-06 16:11 ` H. Peter Anvin
2007-07-06 17:05 ` Andi Kleen
2007-07-06 17:19 ` H. Peter Anvin
2007-07-05 22:17 ` Davide Libenzi
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