From 5e77d28b5fade908e4db9ea3a44c1cf2c2350c24 Mon Sep 17 00:00:00 2001
From: Niklas Hallqvist <niklas@cvs.openbsd.org>
Date: Sun, 1 Mar 1998 17:01:25 +0000
Subject: mips and alpha GCC does not unwind the stack beyond the current frame

---
 sys/miscfs/nullfs/null.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'sys')

diff --git a/sys/miscfs/nullfs/null.h b/sys/miscfs/nullfs/null.h
index 3a777e78e34..bee798d2c03 100644
--- a/sys/miscfs/nullfs/null.h
+++ b/sys/miscfs/nullfs/null.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: null.h,v 1.7 1997/11/06 05:58:39 csapuntz Exp $	*/
+/*	$OpenBSD: null.h,v 1.8 1998/03/01 17:01:24 niklas Exp $	*/
 /*	$NetBSD: null.h,v 1.7 1996/05/17 20:53:11 gwr Exp $	*/
 
 /*
@@ -65,13 +65,16 @@ struct null_node {
 #endif
 };
 
-/* XXX - __builtin_return_address() broken on alpha due to gcc bug */
-#if defined(__alpha__) || !defined(__GNUC__) || __GNUC__ < 2 || \
-	(__GNUC__ == 2 && __GNUC_MINOR__ < 5)
+#if !defined(__GNUC__) || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
 #define RETURN_PC(frameno) (void *)0
 #else
+/* Some architectures can just get the current frame's return address */
+#if defined(alpha) || defined(arc)
+#define RETURN_PC(frameno) (frameno ? 0 : __builtin_return_address(frameno))
+#else
 #define RETURN_PC(frameno) __builtin_return_address(frameno)
 #endif
+#endif
 
 #define NULL_WANTED	0x01
 #define NULL_LOCKED	0x02
-- 
cgit v1.2.3