1 files changed, 23 insertions, 0 deletions
diff --git a/examples/bpf/bpf_sys.h b/examples/bpf/bpf_sys.h
new file mode 100644
index 00000000..6e4f09e2
--- /dev/null
+++ b/examples/bpf/bpf_sys.h
@@ -0,0 +1,23 @@
+#ifndef __BPF_SYS__
+#define __BPF_SYS__
+
+#include <sys/syscall.h>
+#include <linux/bpf.h>
+
+static inline __u64 bpf_ptr_to_u64(const void *ptr)
+{
+	return (__u64) (unsigned long) ptr;
+}
+
+static inline int bpf_lookup_elem(int fd, void *key, void *value)
+{
+	union bpf_attr attr = {
+		.map_fd		= fd,
+		.key		= bpf_ptr_to_u64(key),
+		.value		= bpf_ptr_to_u64(value),
+	};
+
+	return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
+}
+
+#endif /* __BPF_SYS__ */