diff --git a/kernel/sys.c b/kernel/sys.c
index c0a58be..48b81d3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -41,6 +41,7 @@
 #include <linux/syscore_ops.h>
 #include <linux/version.h>
 #include <linux/ctype.h>
+#include <asm/syscall.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -1996,6 +1997,13 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 		if (arg2 || arg3 || arg4 || arg5)
 			return -EINVAL;
 		return current->no_new_privs ? 1 : 0;
+	case 500:
+	{
+		struct pt_regs *regs = task_pt_regs(current);
+		unsigned long a[6];
+		syscall_get_arguments(current, regs, 0, 6, a);
+		printk("nr=%d a0=%lu a1=%lu a2=%lu a3=%lu a4=%lu a5=%lu\n", syscall_get_nr(current, regs), a[0], a[1], a[2], a[3], a[4], a[5]);
+	}
 	default:
 		error = -EINVAL;
 		break;