On Tue, Jun 20, 2023 at 12:24 PM Samuel Thibault
wrote:
> > I don't know much about SSE and those registers and fxsave/fxrstor and
> > xsave/xrstor, but it seems clear enough that this will result in
> > string operations breaking after a thread receives a signal
>
> AIUI the problem only happens
Hello,
Sergey Bugaev, le mar. 20 juin 2023 12:15:23 +0300, a ecrit:
> It seems that gnumach has grown better support for the fancier
> SSE registers in its internal state tracking (i386_fpsave_state /
> i386_xfp_save), but this doesn't seem to be exported to userland.
It enables CR4_OSFXSR, which
Hello,
it occurred to me that as far as userland is concerned, the FPU/SEE
thread state only consists of i386_fp_save & i386_fp_regs, and
userland simply uses frstor to restore it when sigreturning. It seems
that gnumach has grown better support for the fancier SSE registers in
its internal state
