Re: PATCH: (on Alpha) emulating missing instructions

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 15 Oct 1999 14:29:58 +0100 (BST)

> That could be a worthwhile project at some point, as
> that's a fair amount of code. The only thing that concerns
> me, is that is the FP emulation code there to allow booting
> on 386s with no FPU ?
>
> Ie, without it, will the kernel boot on a PC without an FPU ?

It can be made to do so yes. You would be using SIGILL and catching the
exception in userspace instead of kernel space

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