Re: amd64 panic in FPU (Xen and bare-metal)

[Maxime Villard <max%m00nbsd.net@localhost>]

Le 21/06/2020 à 13:36, Manuel Bouyer a écrit :
> Hello,
> I'm trakcing down an issue where the daily anita run on Xen panics in
> the fpu code (see http://www-soc.lip6.fr/~bouyer/NetBSD-tests/xen/HEAD/)
>      traceme_signalmasked_crash_fpe: [ 2047.9968889] panic: kernel diagnostic assertion "curlwp->l_md.md_flags & MDL_FPU_IN_CPU" failed: file "/home/source/ab/HEAD/src/sys/arch/x86/x86/fpu.c", line 524
> [ 2047.9968889] cpu0: Begin traceback...
> [ 2047.9968889] vpanic() at netbsd:vpanic+0x146
> [ 2047.9968889] kern_assert() at netbsd:kern_assert+0x48
> [ 2047.9968889] fputrap() at netbsd:fputrap+0x171
> [ 2047.9968889] cpu0: End traceback...
>
> [...]
>
> Did I miss something with my hand-coded assert in the syscall entry ?

your assert is not correct, you put the check after sti