extern void interrupt_init();
extern void fake_foreign_function_call(os_context_t* context);
extern void undo_fake_foreign_function_call(os_context_t* context);
+extern void arrange_return_to_lisp_function(os_context_t *, lispobj);
extern void interrupt_handle_now(int, siginfo_t*, void*);
extern void interrupt_handle_pending(os_context_t*);
extern void interrupt_internal_error(int, siginfo_t*, os_context_t*,