X32 psABI status

Florian Weimer fw@deneb.enyo.de
Sun Feb 13 14:12:00 GMT 2011


* 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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