X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=include%2Furcu%2Farch%2Faarch64.h;h=f573306a05450d80c7b4548852f7bfa50f03daf3;hb=HEAD;hp=d6a133758dffca0c22ca5f6e94314c4c6d0d5390;hpb=6893800a4d1cc14dff0395ddcd660a5138db183d;p=urcu.git

diff --git a/include/urcu/arch/aarch64.h b/include/urcu/arch/aarch64.h
index d6a1337..f573306 100644
--- a/include/urcu/arch/aarch64.h
+++ b/include/urcu/arch/aarch64.h
@@ -1,25 +1,13 @@
+// SPDX-FileCopyrightText: 2010 Paul E. McKenney, IBM Corporation.
+// SPDX-FileCopyrightText: 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef _URCU_ARCH_AARCH64_H
 #define _URCU_ARCH_AARCH64_H
 
 /*
  * arch/aarch64.h: definitions for aarch64 architecture
- *
- * Copyright (c) 2010 Paul E. McKenney, IBM Corporation.
- * Copyright (c) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <urcu/compiler.h>
@@ -42,6 +30,25 @@ extern "C" {
 #define __NR_membarrier		283
 #endif
 
+/*
+ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
+ *
+ * Backported in RHEL7 gcc 4.8.5-11
+ */
+#if defined(URCU_GCC_VERSION) && defined(__GNUC_RH_RELEASE__)
+# if (URCU_GCC_VERSION == 40805) && (__GNUC_RH_RELEASE__ >= 11)
+#  define URCU_GCC_PATCHED_63293
+# endif
+#endif
+
+#ifdef URCU_GCC_VERSION
+# if URCU_GCC_VERSION < 50100 && !defined(URCU_GCC_PATCHED_63293)
+#  error Your gcc version performs unsafe access to deallocated stack
+# endif
+#endif
+
+#define caa_cpu_relax()	__asm__ __volatile__ ("yield" : : : "memory")
+
 #ifdef __cplusplus
 }
 #endif