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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon, 26 Mar 2018 15:03:54 -1000
Message-ID: <CA+55aFwp-T-WFN95j7u5nn2BExxviJCx1-RgD3Mnu1AN_GYD3w@mail.gmail.com>
Subject: Re: [RFC] new SYSCALL_DEFINE/COMPAT_SYSCALL_DEFINE wrappers
To:     John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc:     Al Viro <viro@zeniv.linux.org.uk>, Ingo Molnar <mingo@kernel.org>,
        Dominik Brodowski <linux@dominikbrodowski.net>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
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        Ralf Baechle <ralf@linux-mips.org>,
        James Hogan <jhogan@kernel.org>,
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        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
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On Sun, Mar 25, 2018 at 8:44 PM, John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
<
> FWIW, we are maintaining an x32 port in Debian and there are some people
> actually using it [1]. There is one build instance running on VMWare that
> I am hosting [2] and around 10800 out of 12900 source packages build fine
> on x32 (12900 being the number for x86_64).

Hmm. Do you have a few statically built binaries that could be tested
without installing a whole distribution? Something real and meaningful
enough that it actually exercised a few real system calls, but not
something that needs to bring in 50 different shared libraries?

Something in /sbin, perhaps, that is still runnable by a regular user
and doesn't require some distro-specific /etc layout etc, so that it
would work even if you don't run Debian at all? Maybe some shell
binary or something?

      Linus