[src/trunk]: src/sys/arch/powerpc/include Add a check to make sure that if PS...

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

details:   https://anonhg.NetBSD.org/src/rev/c6177e69330d
branches:  trunk
changeset: 339220:c6177e69330d
user:      matt <matt%NetBSD.org@localhost>
date:      Mon Jul 06 02:30:22 2015 +0000

description:
Add a check to make sure that if PSL_FP is set, we own the FPU.

diffstat:

 sys/arch/powerpc/include/userret.h |  6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diffs (20 lines):

diff -r 6fb8c270ba56 -r c6177e69330d sys/arch/powerpc/include/userret.h
--- a/sys/arch/powerpc/include/userret.h        Mon Jul 06 01:55:50 2015 +0000
+++ b/sys/arch/powerpc/include/userret.h        Mon Jul 06 02:30:22 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: userret.h,v 1.28 2014/03/10 00:04:04 matt Exp $        */
+/*     $NetBSD: userret.h,v 1.29 2015/07/06 02:30:22 matt Exp $        */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -61,6 +61,10 @@
        KASSERTMSG((tf->tf_srr1 & PSL_PR) != 0,
            "tf=%p: srr1 (%#lx): PSL_PR isn't set!",
            tf, tf->tf_srr1);
+       KASSERTMSG((tf->tf_srr1 & PSL_FP) == 0
+           || l->l_cpu->ci_data.cpu_pcu_curlwp[PCU_FPU] == l,
+           "tf=%p: srr1 (%#lx): PSL_FP set but FPU curlwp %p is not curlwp %p!",
+           tf, tf->tf_srr1, l->l_cpu->ci_data.cpu_pcu_curlwp[PCU_FPU], l);
 
        tf->tf_srr1 &= PSL_USERSRR1;    /* clear SRR1 status bits */