[MIPS] Add seccomp bpf support

sandbox/linux/seccomp-bpf/kernel_return_value_helpers.h

Index: sandbox/linux/seccomp-bpf/kernel_return_value_helpers.h
diff --git a/sandbox/linux/seccomp-bpf/kernel_return_value_helpers.h b/sandbox/linux/seccomp-bpf/kernel_return_value_helpers.h
new file mode 100644
index 0000000000000000000000000000000000000000..d11339cdf0d3f453a33ff6f11084fd0f93cd6227
--- /dev/null
+++ b/sandbox/linux/seccomp-bpf/kernel_return_value_helpers.h
@@ -0,0 +1,17 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SANDBOX_LINUX_SERVICES_KERNEL_RETURN_VALUE_HELPERS_H

[jln (very slow on Chromium), 2014/05/28 00:06:57]

Nit: the header guard requires a trailing "_"

[nedeljko, 2014/05/29 14:06:45]

Done.

+#define SANDBOX_LINUX_SERVICES_KERNEL_RETURN_VALUE_HELPERS_H
+
+#include <signal.h>
+
+namespace sandbox {
+
+int ErrnoToKernelRet(int kernel_ret);

[jln (very slow on Chromium), 2014/05/28 00:06:57]

Please, document both function in this header file.

[nedeljko, 2014/05/29 14:06:45]

Done.

+void PutValueInUcontext(int ret_val, ucontext_t* ctx);
+
+} // namespace sandbox
+
+#endif  // SANDBOX_LINUX_SERVICES_KERNEL_RETURN_VALUE_HELPERS_H