diff --git a/study/debug/tools/systemtap/00-code/3-components_of_a_systemTap_script/test_mkdir.stp b/study/debug/tools/systemtap/00-code/3-components_of_a_systemTap_script/test_mkdir.stp
index 4336688..0b3e3f7 100644
--- a/study/debug/tools/systemtap/00-code/3-components_of_a_systemTap_script/test_mkdir.stp
+++ b/study/debug/tools/systemtap/00-code/3-components_of_a_systemTap_script/test_mkdir.stp
@@ -1,12 +1,18 @@
 
 probe kernel.function("sys_mkdir").call
 {
-	printf("enter %s\n", $pathname);
+	log("enter");
 }
 
 probe kernel.function("sys_mkdir").return
 {
-	printf("exit %s\n", $pathname);
+	log("exit\n\n");
+}
+
+
+probe syscall.mkdir
+{
+	printf ("%s(%d) mkdir (%s)\n", execname( ), pid( ), argstr)
 }
 
 probe begin