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Message-ID: <CABqD9ha1mMMe09abu7JA+104GfwYwhH4o1Tp-SxGJTmO849D5Q@mail.gmail.com>
Date: Wed, 22 Feb 2012 13:48:17 -0600
From: Will Drewry <wad@...omium.org>
To: "H. Peter Anvin" <hpa@...or.com>
Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com,
netdev@...r.kernel.org, x86@...nel.org, arnd@...db.de, davem@...emloft.net,
mingo@...hat.com, oleg@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
mcgrathr@...omium.org, tglx@...utronix.de, luto@....edu, eparis@...hat.com,
serge.hallyn@...onical.com, djm@...drot.org, scarybeasts@...il.com,
indan@....nu, pmoore@...hat.com, akpm@...ux-foundation.org, corbet@....net,
eric.dumazet@...il.com, markus@...omium.org, keescook@...omium.org
Subject: Re: [PATCH v10 05/11] seccomp: add system call filtering using BPF
On Wed, Feb 22, 2012 at 12:32 AM, H. Peter Anvin <hpa@...or.com> wrote:
> On 02/21/2012 09:30 AM, Will Drewry wrote:
>> +
>> +/**
>> + * struct seccomp_data - the format the BPF program executes over.
>> + * @args: up to 6 system call arguments. When the calling convention is
>> + * 32-bit, the arguments will still be at each args[X] offset.
>> + * @instruction_pointer: at the time of the system call.
>> + * @arch: indicates system call convention as an AUDIT_ARCH_* value
>> + * as defined in <linux/audit.h>.
>> + * @nr: the system call number
>> + */
>> +struct seccomp_data {
>> + __u64 args[6];
>> + __u64 instruction_pointer;
>> + __u32 arch;
>> + int nr;
>> +};
>>
>
> This got flipped around for some reason... that is a problem if we ever
> need to extend this to more than 6 arguments (I thought we had at least
> one architecture which supported 7 arguments already, but I could just
> be delusional.)
Makes sense - I'll put it back in the proper order.
thanks!
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