alarm task finished

kernel/proc.h

@@ -104,4 +104,8 @@ struct proc {
   struct file *ofile[NOFILE];  // Open files
   struct inode *cwd;           // Current directory
   char name[16];               // Process name (debugging)
+  int alarm_cnt;               // Alarm count
+  int inter_cnt;               // interrupts count 
+  uint64 handler;              // alarm func address
+  struct trapframe *pre_trapframe;
 };