fix race in holding() check in acquire()

give cpu1 a TSS and gdt for when it enters scheduler()
and a pseudo proc[] entry for each cpu
cpu0 waits for each other cpu to start up
read() for files

1 files changed, 4 insertions, 2 deletions

diff --git a/userfs.c b/userfs.c
index 0b2e9c3..b11f3eb 100644
--- a/userfs.c
+++ b/userfs.c
@@ -5,7 +5,8 @@
 // file system tests
 
 char buf[1024];
-char *args[] = { "echo", "hello", "goodbye", 0 };
+char *echo_args[] = { "echo", "hello", "goodbye", 0 };
+char *cat_args[] = { "cat", "README", 0 };
 
 int
 main(void)
@@ -34,6 +35,7 @@ main(void)
   } else {
     puts("open doesnotexist failed\n");
   }
-  exec("echo", args);
+  //exec("echo", echo_args);
+  exec("cat", cat_args);
   return 0;
 }