Index: lib/safestack/safestack.cc
===================================================================
--- lib/safestack/safestack.cc
+++ lib/safestack/safestack.cc
@@ -257,11 +257,20 @@
 #endif
 
 extern "C"
-    __attribute__((visibility("default"))) void *__get_unsafe_stack_start() {
+    __attribute__((visibility("default"))) void *__get_unsafe_stack_bottom() {
   return unsafe_stack_start;
 }
 
 extern "C"
+    __attribute__((visibility("default"))) void *__get_unsafe_stack_top() {
+  return (char*)unsafe_stack_start + unsafe_stack_size;
+}
+
+extern "C"
+    __attribute__((visibility("default"), alias("__get_unsafe_stack_bottom")))
+    void *__get_unsafe_stack_start();
+
+extern "C"
     __attribute__((visibility("default"))) void *__get_unsafe_stack_ptr() {
   return __safestack_unsafe_stack_ptr;
 }