From f5423e77ba921961fe4b88c7cd4a64c470dc21a5 Mon Sep 17 00:00:00 2001
From: Theo de Raadt <deraadt@cvs.openbsd.org>
Date: Sun, 23 May 2004 06:46:10 +0000
Subject: netbsd 1.54; do not count on new process having cleared condition
 codes; hunted down by brian poole as relevant for the occassional cron
 failure at startup...

---
 sys/arch/sparc64/sparc64/vm_machdep.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'sys/arch')

diff --git a/sys/arch/sparc64/sparc64/vm_machdep.c b/sys/arch/sparc64/sparc64/vm_machdep.c
index 45864d16e23..a5dcebf5307 100644
--- a/sys/arch/sparc64/sparc64/vm_machdep.c
+++ b/sys/arch/sparc64/sparc64/vm_machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vm_machdep.c,v 1.9 2003/02/24 07:55:08 miod Exp $	*/
+/*	$OpenBSD: vm_machdep.c,v 1.10 2004/05/23 06:46:09 deraadt Exp $	*/
 /*	$NetBSD: vm_machdep.c,v 1.38 2001/06/30 00:02:20 eeh Exp $ */
 
 /*
@@ -310,11 +310,15 @@ cpu_fork(p1, p2, stack, stacksize, func, arg)
 
 	npcb->pcb_pc = (long)proc_trampoline - 8;
 	npcb->pcb_sp = (long)rp - STACK_OFFSET;
+
 	/* Need to create a %tstate if we're forking from proc0 */
 	if (p1 == &proc0)
 		tf2->tf_tstate = (ASI_PRIMARY_NO_FAULT<<TSTATE_ASI_SHIFT) |
 			((PSTATE_USER)<<TSTATE_PSTATE_SHIFT);
-
+	else
+		/* clear condition codes and disable FPU */
+		tf2->tf_tstate &=
+		    ~((PSTATE_PEF<<TSTATE_PSTATE_SHIFT)|TSTATE_CCR);
 
 #ifdef NOTDEF_DEBUG
 	printf("cpu_fork: Copying over trapframe: otf=%p ntf=%p sp=%p opcb=%p npcb=%p\n", 
-- 
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