add empty lab 1 syscalls

1 files changed, 16 insertions, 1 deletions

diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 1287d98..d53c1bd 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -25,10 +25,25 @@ syscall_handler (struct intr_frame *f UNUSED)
       // halt
       power_off ();
       break;
+    case 1:
+      // exit
+      break;
+    case 4:
+      // create
+      break;
+    case 6:
+      // open
+      break;
+    case 8:
+      // read
+      break;
     case 9:
-      // printf
+      // write
       printf ("printf: %s", INTR_ESP(2, char *));
       break;
+    case 12:
+      // close
+      break;
     default:
       printf ("kernel: unknown syscall '%d'\n", syscall_number);
       break;