linux-kernel - Re: [PATCH v5 2/3] seccomp_filters: system call filtering using BPF

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Message-ID: <CAObL_7F-vXXbkj8-9xsrxETyUka5xQ0jD9teN_Li50QzRYZugw@mail.gmail.com>
Date:	Mon, 30 Jan 2012 14:29:54 -0800
From:	Andrew Lutomirski <luto@....edu>
To:	Will Drewry <wad@...omium.org>
Cc:	Indan Zupancic <indan@....nu>, linux-kernel@...r.kernel.org,
	keescook@...omium.org, john.johansen@...onical.com,
	serge.hallyn@...onical.com, coreyb@...ux.vnet.ibm.com,
	pmoore@...hat.com, eparis@...hat.com, djm@...drot.org,
	torvalds@...ux-foundation.org, segoon@...nwall.com,
	rostedt@...dmis.org, jmorris@...ei.org, scarybeasts@...il.com,
	avi@...hat.com, penberg@...helsinki.fi, viro@...iv.linux.org.uk,
	mingo@...e.hu, akpm@...ux-foundation.org, khilman@...com,
	borislav.petkov@....com, amwang@...hat.com, oleg@...hat.com,
	ak@...ux.intel.com, eric.dumazet@...il.com, gregkh@...e.de,
	dhowells@...hat.com, daniel.lezcano@...e.fr,
	linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, olofj@...omium.org,
	mhalcrow@...gle.com, dlaor@...hat.com, corbet@....net,
	alan@...rguk.ukuu.org.uk, mcgrathr@...omium.org
Subject: Re: [PATCH v5 2/3] seccomp_filters: system call filtering using BPF

[not quoting anything because this is a more general question]

How portable across architectures is this supposed to be?  At least
syscall numbering varies widely, and calling conventions can be
different (x86_64 has four of them, for example).  For all I know,
argument order might be different in some cases.

--Andy
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