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Message-ID: <20161121104102.2b244311@gandalf.local.home>
Date: Mon, 21 Nov 2016 10:41:02 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: alexander.levin@...izon.com
Cc: "dvyukov@...gle.com" <dvyukov@...gle.com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"scientist@...com" <scientist@...com>,
"glider@...gle.com" <glider@...gle.com>,
"andreyknvl@...gle.com" <andreyknvl@...gle.com>,
"arnd@...db.de" <arnd@...db.de>,
"mathieu.desnoyers@...icios.com" <mathieu.desnoyers@...icios.com>,
"daniel.vetter@...ll.ch" <daniel.vetter@...ll.ch>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 1/3] abi_spec: basic definitions of constraints, args and
syscalls
On Wed, 16 Nov 2016 17:37:00 +0000
alexander.levin@...izon.com wrote:
> This is a very simple definition of the syscall ABI we can build on. The idea
> is to have a generic description of syscalls, their arguments and return
> values we can use to audit the kernel's implementation vs the specs.
>
> Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
> ---
> include/uapi/linux/abi_spec.h | 58 +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 58 insertions(+)
> create mode 100644 include/uapi/linux/abi_spec.h
>
> diff --git a/include/uapi/linux/abi_spec.h b/include/uapi/linux/abi_spec.h
> new file mode 100644
> index 0000000..ad1a992
> --- /dev/null
> +++ b/include/uapi/linux/abi_spec.h
> @@ -0,0 +1,58 @@
> +#ifndef ABI_SPEC_H_
> +#define ABI_SPEC_H_
> +
> +#include <linux/fcntl.h>
> +#include <linux/stat.h>
> +#define MAX_CONSTRAINTS 10
> +#define MAX_ARGS 10
> +
I'm curious to where you picked the number 10 from? Actually, I was
doing some work with the syscall_get_arguments() and the max syscall
arguments is currently set to 6. Anything greater causes a bug.
-- Steve
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