1 files changed, 3 insertions, 3 deletions
diff --git a/main.c b/main.c
index ad0c9c2..0d2a017 100644
--- a/main.c
+++ b/main.c
@@ -23,7 +23,7 @@ void
 main0(void)
 {
   int i;
-  int bcpu;
+  static int bcpu;  // cannot be on stack
   struct proc *p;
 
   // clear BSS
@@ -37,8 +37,8 @@ main0(void)
   bcpu = mp_bcpu();
 
   // switch to bootstrap processor's stack
-  asm volatile("movl %0, %%esp" : : "r" (cpus[0].mpstack + MPSTACK - 32));
-  asm volatile("movl %0, %%ebp" : : "r" (cpus[0].mpstack + MPSTACK));
+  asm volatile("movl %0, %%esp" : : "r" (cpus[bcpu].mpstack + MPSTACK - 32));
+  asm volatile("movl %0, %%ebp" : : "r" (cpus[bcpu].mpstack + MPSTACK));
 
   lapic_init(bcpu);