Re: kern/60539 (XSAVE changes break ucontext userspace API)

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Thu, 6 Aug 2026 02:47:23 +0000
    From:        Taylor R Campbell <riastradh%NetBSD.org@localhost>
    Message-ID:  <20260806024725.4385484D7C%mail.netbsd.org@localhost>

You can laugh as much as you like, and no need to reply, I know how
absurd this would be ...

  | I think such applications are likely to be inherently problematic.  If
  | you're doing value substitution in an FPU trap handler, and some
  | AVX512 instruction operating on a 512-bit ZMM vector register traps,

And if you were doing software emulation of the AVX512 instructions,
wouldn't the trap handler need to be able to access the (emulated)
registers ?

kre