1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/proc.h b/kernel/proc.h
index c816ae2..a195b02 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -106,4 +106,9 @@ struct proc {
   struct file *ofile[NOFILE];  // Open files
   struct inode *cwd;           // Current directory
   char name[16];               // Process name (debugging)
+  int alarm_interval;          // sigalarm syscall interval
+  uint64 alarm_handler;        // sigalarm syscall handler
+  int alarm_tickspassed;       // record how many ticks passed since last sigalarm handler call
+  int alarm_caninvoke;         // prevent re-entrant calls to handler
+  struct trapframe *atpfm;     // trapframe to resume after handling, must hold p->lock
 };