linux-kernel - Re: [PATCH] arch: avr32: add dummy syscalls

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Message-ID: <510F2933.6010807@zytor.com>
Date:	Sun, 03 Feb 2013 19:21:23 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Al Viro <viro@...IV.linux.org.uk>
CC:	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Dave Jones <davej@...hat.com>,
	Will Deacon <will.deacon@....com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch: avr32: add dummy syscalls

On 02/03/2013 05:31 PM, Al Viro wrote:
>
> Unless I'm misreading ocavr32.pdf, that should be (R12, R10:R11, R9, R8) and
> (R12, R10:R11, R9:R8, stack) resp., so fadvise64 doesn't need a wrapper, but
> fadvise64_64 does.  And something like (s32, s32, s64, s64) would turn into
> (R12, R11, R9:R8, stack, stack); AFAICS, we don't have anything that ugly...
>
> Automating *that* is going to be interesting...  I've not given up, but it's
> not going to be fun ;-/
>

Feel free to steal machinery from klibc... it has scripts to 
autogenerate stubs for arbitrary ABIs.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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