1 files changed, 39 insertions, 0 deletions
diff --git a/gcc-4.9/libitm/config/linux/futex_bits.h b/gcc-4.9/libitm/config/linux/futex_bits.h
new file mode 100644
index 000000000..62d83d185
--- /dev/null
+++ b/gcc-4.9/libitm/config/linux/futex_bits.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   Libitm 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 General Public License for
+   more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Provide target-independant access to the futex system call.  */
+
+/* Note for ARM:
+   There are two styles of syscall, and in the eabi style the syscall
+   number goes into the thumb frame pointer.  We need to either write
+   this in pure assembler or just defer entirely to libc.  */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+
+static inline long
+sys_futex0 (std::atomic<int> *addr, long op, long val)
+{
+  return syscall (SYS_futex, (int*) addr, op, val, 0);
+}