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, 1 insertions, 0 deletions

diff --git a/syscall.c b/syscall.c
index 498078e..ce6e22d 100644
--- a/syscall.c
+++ b/syscall.c
@@ -274,6 +274,7 @@ sys_open(void)
   fd->readable = 1;
   fd->writeable = 0;
   fd->ip = ip;
+  fd->off = 0;
   cp->fds[ufd] = fd;
 
   return ufd;