From mboxrd@z Thu Jan  1 00:00:00 1970
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
Subject: Re: Can I run an application compiled with gcc ABI 2.95 on a
	kernel compiled with gcc ABI 3.4?
Date: Fri, 15 May 2009 22:42:36 +0100
Message-ID: <20090515214236.GY650@n2100.arm.linux.org.uk>
References: <20090515115009.110740@gmx.net> <1242390699.4201.3.camel@macbook.infradead.org> <20090515135105.GC8235@shareable.org> <20090515135557.GC18976@trinity.fluff.org> <20090515143230.GE10977@mvista.com> <20090515145435.GF8235@shareable.org>
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To: Jamie Lokier <jamie@shareable.org>
Cc: "George G. Davis" <gdavis@mvista.com>, Ben Dooks <ben-linux@fluff.org>, David Woodhouse <dwmw2@infradead.org>, muzungu@gmx.net, linux-embedded@vger.kernel.org, linux-arm-kernel@lists.arm.linux.org.uk

On Fri, May 15, 2009 at 03:54:35PM +0100, Jamie Lokier wrote:
> Register/parameter assignment: How is that relevant to the kernel
> interface, if the kernel itself and modules are all EABI?  The system
> call interface is a fixed set of registers.

No it is not.  The syscall interface obeys the ABI register allocation
rules as well, otherwise we have to have veneeer layers to reshuffle
the registers prior to calling C functions.