add null_call() system call

For kernel entry/exit tracing.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/syscalls.c b/src/syscalls.c
index b2ab900..2c9a446 100644
--- a/src/syscalls.c
+++ b/src/syscalls.c
@@ -100,3 +100,8 @@ int release_ts(lt_t *delay)
 {
         return syscall(__NR_release_ts, delay);
 }
+
+int null_call(cycles_t *timestamp)
+{
+        return syscall(__NR_null_call, timestamp);
+}