linux-kernel - Re: [PATCH] alternative to sys

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Message-ID: <4810C16A.3000606@zytor.com>
Date:	Thu, 24 Apr 2008 10:20:42 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Michael Kerrisk <mtk.manpages@...il.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	David Miller <davem@...emloft.net>,
	torvalds@...ux-foundation.org, drepper@...hat.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	"akpm@...ux-foundation.org Jakub Jelinek" <jakub@...hat.com>
Subject: Re: [PATCH] alternative to sys_indirect, part 1

Michael Kerrisk wrote:
> On 4/24/08, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>>> But this approach fixes just one of the interfaces.  There are 7 or 8
>>  > other interfaces that need to solve the same problem.  What about
>>  > those?
>>
>>
>> Actually it seems to fix most of them.
> 
> Am I missingg something?  How?  There a number of system calls that
> have neither a flags argument, nor another argument that we can
> overload (as you propose with socket()).  For those, we'd need new
> system calls os sys_indirect().
> 

sys_indirect is a total red herring here, since it won't help one iota 
making the userspace interface comprehensible - it just introduces a 
different calling convention that the C library will have to thunk.

	-hpa
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