linux-kernel - Re: seccomp and ptrace. what is the correct order?

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Message-ID: <4FBC0078.7010002@zytor.com>
Date:	Tue, 22 May 2012 14:09:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Will Drewry <wad@...omium.org>
CC:	Al Viro <viro@...iv.linux.org.uk>, Indan Zupancic <indan@....nu>,
	Roland McGrath <mcgrathr@...gle.com>,
	Eric Paris <netdev@...isplace.org>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	kernel-hardening@...ts.openwall.com, mingo@...hat.com,
	oleg@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
	tglx@...utronix.de, luto@....edu, eparis@...hat.com,
	serge.hallyn@...onical.com, pmoore@...hat.com,
	akpm@...ux-foundation.org, corbet@....net, eric.dumazet@...il.com,
	markus@...omium.org, coreyb@...ux.vnet.ibm.com,
	keescook@...omium.org
Subject: Re: seccomp and ptrace. what is the correct order?

On 05/22/2012 01:48 PM, Will Drewry wrote:
> 
> That was my first thought too, so I ran a few simple tests.  gcc isn't
> smart enough to not add ~344 bytes of code to get the number and
> arguments for the x86/kernel/ptrace.c case I included (in the
> naive-est of integrations).  But I don't know that it justifies the
> extra patchwork or enforcing shared code across arches.
> 

I suspect the construction of those inlines can be improved.

	-hpa

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