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From: David Miller <davem@davemloft.net>
Subject: Re: 64-syscall args on 32-bit vs syscall()
Date: Sun, 14 Mar 2010 22:06:46 -0700 (PDT)
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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 15 Mar 2010 15:48:13 +1100

> As it is, any 32-bit app using syscall() on any of the syscalls that
> takes 64-bit arguments will be broken, unless the app itself breaks up
> the argument, but the the order of the hi and lo part is different
> between BE and LE architectures ;-)

I think it is even different on the same endian architectures,
f.e. mips I think.

There is no way to do this without some arch specific code
to handle things properly, really.