linux-kernel - [PATCH RFC 0/1] UAPI,x86: export syscall numbers for all x86 archs

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Message-Id: <1438070731-17764-1-git-send-email-drysdale@google.com>
Date:	Tue, 28 Jul 2015 09:05:30 +0100
From:	David Drysdale <drysdale@...gle.com>
To:	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	Michael Kerrisk <mtk.manpages@...il.com>,
	Kees Cook <keescook@...omium.org>,
	Paul Moore <paul@...l-moore.com>,
	Eric Paris <eparis@...hat.com>, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org, David Drysdale <drysdale@...gle.com>
Subject: [PATCH RFC 0/1] UAPI,x86: export syscall numbers for all x86 archs

A while ago I was trying to build a seccomp-bpf filter program that would
survive a change of x86 architecture.  This was complicated for all sorts of
reasons, but one of the problems was that the different syscall numbers aren't
all available at the same time -- hence this patch.

Naming-wise, Andy Lutomirski has indicated he'd prefer the prefixes to be
__NR_x86_64_, __NR_x86_64_x32_ and __NR_i386_; however, for the latter two
sets of numbers there are existing headers that use different prefixes
(__NR_x32_ and __NR_ia32_), so altering those would involve a change and/or an
additional set of definitions.  For the new constants I've left in my
original suggestion (__NR_amd64_) for the time being.

What are folks' thoughts about the preferred naming for these?

David Drysdale (1):
  UAPI,x86: export syscall numbers for all x86 archs

 arch/x86/entry/syscalls/Makefile | 11 ++++++++---
 arch/x86/include/uapi/asm/Kbuild |  3 +++
 2 files changed, 11 insertions(+), 3 deletions(-)

--
2.4.3.573.g4eafbef
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