1 files changed, 8 insertions, 2 deletions
diff --git a/sysfile.c b/sysfile.c
index 9de3d86..64f2b33 100644
--- a/sysfile.c
+++ b/sysfile.c
@@ -1,3 +1,9 @@
+//
+// File-system system calls.
+// Mostly argument checking, since we don't trust
+// user code, and calls into file.c and fs.c.
+//
+
 #include "types.h"
 #include "defs.h"
 #include "param.h"
@@ -382,13 +388,13 @@ sys_exec(void)
   for(i=0;; i++){
     if(i >= NELEM(argv))
       return -1;
-    if(fetchint(proc, uargv+4*i, (int*)&uarg) < 0)
+    if(fetchint(uargv+4*i, (int*)&uarg) < 0)
       return -1;
     if(uarg == 0){
       argv[i] = 0;
       break;
     }
-    if(fetchstr(proc, uarg, &argv[i]) < 0)
+    if(fetchstr(uarg, &argv[i]) < 0)
       return -1;
   }
   return exec(path, argv);