I have recently developed o modude (for experimental purposes only) which
does a lot of maths in kernel mode and communicates with userland with
/proc. After reading some fpu/mmx/sse/sse2/3dnow whitepapers, I found
several ways to optimize it for i386. My question is, can I use all these
extensions while running on behalf of a userspace process? I doubt cause
kernel does not seem to save the state of theses specific registers at
system calls. It is true? Will a kernel thread solve this problem? Thank you
in advance. Have a nice day.
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