[src/trunk]: src/sys/arch/arm/vfp Don't try to catch undefined VFP instructio...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1b18d8128d40
branches:  trunk
changeset: 336762:1b18d8128d40
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Mar 17 22:34:10 2015 +0000

description:
Don't try to catch undefined VFP instructions if we own the the FPU.
Let them raise SIGILL.

diffstat:

 sys/arch/arm/vfp/vfp_init.c |  6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diffs (20 lines):

diff -r 271c7c239ec8 -r 1b18d8128d40 sys/arch/arm/vfp/vfp_init.c
--- a/sys/arch/arm/vfp/vfp_init.c       Tue Mar 17 22:29:40 2015 +0000
+++ b/sys/arch/arm/vfp/vfp_init.c       Tue Mar 17 22:34:10 2015 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: vfp_init.c,v 1.43 2015/03/17 17:20:55 matt Exp $ */
+/*      $NetBSD: vfp_init.c,v 1.44 2015/03/17 22:34:10 matt Exp $ */
 
 /*
  * Copyright (c) 2008 ARM Ltd
@@ -402,6 +402,10 @@
        if (!vfp_fpscr_handler(address, insn, frame, fault_code))
                return 1;
 
+       /* if we already own the FPU, raise SIGILL */
+       if (curcpu()->ci_pcu_curlwp[PCU_FPU] == curlwp)
+               return 0;
+
        /*
         * Make sure we own the FP.
         */