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Date: Thu, 15 May 2014 18:01:53 +0200
From: chrubis@suse.cz
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
        Darren Hart <dvhart@linux.intel.com>,
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        Peter Zijlstra <peterz@infradead.org>,
        Linux API <linux-api@vger.kernel.org>,
        "Carlos O'Donell" <carlos@redhat.com>
Subject: Re: futex(2) man page update help request
Message-ID: <20140515160152.GA7529@rei.Home>
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Hi!
> > Have a look at this commit that tries to deal with passing 64 bit
> > numbers to syscalls. On 32 bit ABI (but not on X32) these needs to be
> > split up (accordingly to machine endianity).
> > 
> > https://github.com/linux-test-project/ltp/commit/04afb02b4280a20c262054e8f99a3fad4ad54916
> > 
> 
> That is wrong, too.  That assumes that there will never be padding
> words, which isn't true in the general case, either.

Well, it's still far better than the mess we had previously and it works
in most of the cases. However I would love to fix these correctly once
for all.

> I really believe the proper fix is to use assembly syscall stubs.  In
> klibc I build a fairly elaborate machinery to autogenerate such syscall
> stubs for a variety of architectures.

Then it would be nice to share these between klibc and LTP (and possible
everybody else).

-- 
Cyril Hrubis
chrubis@suse.cz