Re: 486SX and other fpu-less systems

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

On Sun, 26 Jan 2014 23:34:13 +0000
David Laight <david%l8s.co.uk@localhost> wrote:
> I think the the cpu traps though vector 7.

Yes.

> This is the same vector as is used for 'fpu not owned by the task'
> and ends up in npxdna() - which doesn't check for 'no fpu'.

Look at a trap.c before fpu emulation support was removed
(eg. rev. 1.231).
Without kernel support, only a softfloat userland will work aiui.

best regards
Matthias


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