Re: [PATCHv2 1/1] Documentation: describe how to add a system call

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To: "H. Peter Anvin" <hpa@xxxxxxxxx>
Subject: Re: [PATCHv2 1/1] Documentation: describe how to add a system call
From: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Date: Fri, 31 Jul 2015 23:18:06 -0700
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, David Drysdale <drysdale@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Linux API <linux-api@xxxxxxxxxxxxxxx>, Michael Kerrisk <mtk.manpages@xxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Eric B Munson <emunson@xxxxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Vivek Goyal <vgoyal@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxxxx>, David Herrmann <dh.herrmann@xxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx>, Milosz Tanski <milosz@xxxxxxxxx>, Fam Zheng <famz@xxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, "linux-doc@xxxxxxxxxxxxxxx" <linux-doc@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
In-reply-to: <55BC518E.4010102@zytor.com>
User-agent: Mutt/1.5.23 (2014-03-12)

On Fri, Jul 31, 2015 at 09:56:46PM -0700, H. Peter Anvin wrote:
> On 07/31/2015 09:32 PM, Josh Triplett wrote:
> > 
> > Sure, agreed.  But I really hope we don't create new kernel ABIs that
> > involve constructs like that.
> > 
> 
> It's worth noting I have pushed for auto-marshalling in general for a
> long time, not the least to get rid of the awful syscall(3) wrapper.  I
> even built a prototype but didn't have time to productize it.

Interesting!  Can you post the prototype?

- Josh Triplett
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References:
- Re: [PATCHv2 1/1] Documentation: describe how to add a system call
  - From: Josh Triplett
- Re: [PATCHv2 1/1] Documentation: describe how to add a system call
  - From: Kees Cook
- Re: [PATCHv2 1/1] Documentation: describe how to add a system call
  - From: Josh Triplett
- Re: [PATCHv2 1/1] Documentation: describe how to add a system call
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- Re: [PATCHv2 1/1] Documentation: describe how to add a system call
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