1 files changed, 3 insertions, 0 deletions
diff --git a/user/user.h b/user/user.h
index 4d398d5..14f69e5 100644
--- a/user/user.h
+++ b/user/user.h
@@ -1,4 +1,5 @@
 struct stat;
+struct sysinfo;
 
 // system calls
 int fork(void);
@@ -22,6 +23,8 @@ int getpid(void);
 char* sbrk(int);
 int sleep(int);
 int uptime(void);
+int trace(int);
+int sysinfo(struct sysinfo*);
 
 // ulib.c
 int stat(const char*, struct stat*);