X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fvalidate.h;h=478f321d2654a2b238fb45433ba0f7bfe6807f23;hb=929fde778f2e5a422f9bcd8ad5f6dcf1dbfccf15;hp=36c973c534d569a54abe92c525ff35b740564821;hpb=75b52379bdc2269961af6a1308eca63610f38ac3;p=sbcl.git

diff --git a/src/runtime/validate.h b/src/runtime/validate.h
index 36c973c..478f321 100644
--- a/src/runtime/validate.h
+++ b/src/runtime/validate.h
@@ -27,13 +27,16 @@
 #include <thread.h>
 #ifdef LISP_FEATURE_STACK_GROWS_DOWNWARD_NOT_UPWARD 
 #define CONTROL_STACK_GUARD_PAGE(th) ((void *)(th->control_stack_start))
+#define CONTROL_STACK_RETURN_GUARD_PAGE(th) (CONTROL_STACK_GUARD_PAGE(th) + os_vm_page_size)
 #else
-#define CONTROL_STACK_GUARD_PAGE(th) \
-     (((void *)(th->control_stack_end)) - os_vm_page_size)
+#define CONTROL_STACK_GUARD_PAGE(th) (((void *)(th->control_stack_end)) - os_vm_page_size)
+#define CONTROL_STACK_RETURN_GUARD_PAGE(th) (CONTROL_STACK_GUARD_PAGE(th) - os_vm_page_size)
 #endif
 
 extern void validate(void);
 extern void protect_control_stack_guard_page(pid_t t_id, int protect_p);
+extern void protect_control_stack_return_guard_page(pid_t t_id, int protect_p);
+extern os_vm_address_t undefined_alien_address;
 #endif
 
 /* note for anyone trying to port an architecture's support files