linux-kernel - Re: X32 psABI status

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Message-ID: <87r5bcnwvw.fsf@mid.deneb.enyo.de>
Date:	Sun, 13 Feb 2011 09:48:03 +0100
From:	Florian Weimer <fw@...eb.enyo.de>
To:	x32-abi@...glegroups.com
Cc:	"H.J. Lu" <hjl.tools@...il.com>, GCC Development <gcc@....gnu.org>,
	GNU C Library <libc-alpha@...rceware.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: X32 psABI status

* H. Peter Anvin:

> On 02/12/2011 01:10 PM, Florian Weimer wrote:
>> Why is the ia32 compatiblity kernel interface used?
>
> Because there is no way in hell we're designing in a second
> compatibility ABI in the kernel (and it has to be a compatibility ABI,
> because of the pointer size difference.)

Actually, I'm wondering if you can do the translation in user space.
There already are 32-on-64 implementations in existence, without
kernel changes (recent Hotspot, LuaJIT, and probably some more).
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