On 2017/10/21 12:04, Tim Stewart wrote:
> *49727 296965 0 0 7 0x14200 crynlk
aha, it was that one. Try this diff on top.
Index: fpu.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/fpu.c,v
retrieving revision 1.38
diff -u -p -r1.38 fpu.c
--- fpu.c 14 Oct 2017 04:44:43 -0000 1.38
+++ fpu.c 21 Oct 2017 16:16:14 -0000
@@ -347,7 +347,7 @@ void
fpu_kernel_enter(void)
{
struct cpu_info *ci = curcpu();
- uint32_t cw;
+ struct savefpu *sfp;
int s;
/*
@@ -376,10 +376,11 @@ fpu_kernel_enter(void)
/* Initialize the FPU */
fninit();
- cw = __INITIAL_NPXCW__;
- fldcw(&cw);
- cw = __INITIAL_MXCSR__;
- ldmxcsr(&cw);
+ sfp = &proc0.p_addr->u_pcb.pcb_savefpu;
+ memset(&sfp->fp_fxsave, 0, sizeof(sfp->fp_fxsave));
+ sfp->fp_fxsave.fx_fcw = __INITIAL_NPXCW__;
+ sfp->fp_fxsave.fx_mxcsr = __INITIAL_MXCSR__;
+ fxrstor(&sfp->fp_fxsave);
}
void
