1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/proc.h b/kernel/proc.h
index a195b02..ebdbb7a 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -81,6 +81,20 @@ struct trapframe {
 
 enum procstate { UNUSED, USED, SLEEPING, RUNNABLE, RUNNING, ZOMBIE };
 
+// mmap vm area
+#define MAX_VM_AREA 0x40
+
+struct vm_area {
+  uint64 start_addr;
+  uint64 roff;
+  uint64 woff;
+  uint64 len;
+  int prot;
+  int flags;
+  struct file* file;
+  int fd;
+};
+
 // Per-process state
 struct proc {
   struct spinlock lock;
@@ -111,4 +125,6 @@ struct proc {
   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
+  struct vm_area vma[MAX_VM_AREA]; // vm_area
+  uint64 cur_max_vm_addr;      // current max vm addr, used by mmap
 };