Re: context switch vs. signal delivery [was: Re: Accelerating user mode linux]
Jamie Lokier (email@example.com)
Mon, 5 Aug 2002 23:09:41 +0100
Andi Kleen wrote:
> > 2: What happens when the user's signal handler decides it wants to save
> > the FPU state itself (after all) and proceed with some FPU use. Will
> > sigreturn restore the user-saved FPU state? Just curious.
> Nope it won't because there is no saved state. The previous context's FPU
> state will be silently corrupted.
I meant if the user's signal handler decides it wants to save the FPU
state directly into the signal context struct, after deciding to do
that. Won't that work?
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