inaccessible page under the user stack page, to help exec deal w/ too-large args

1 files changed, 1 insertions, 0 deletions

diff --git a/defs.h b/defs.h
index 19d559b..4b3eec9 100644
--- a/defs.h
+++ b/defs.h
@@ -176,6 +176,7 @@ pde_t*          copyuvm(pde_t*, uint);
 void            switchuvm(struct proc*);
 void            switchkvm(void);
 int             copyout(pde_t*, uint, void*, uint);
+void            clear_pte_u(pde_t *pgdir, char *uva);
 
 // number of elements in fixed-size array
 #define NELEM(x) (sizeof(x)/sizeof((x)[0]))