#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
-kern_return_t mach_thread_init(mach_port_t thread_exception_port);
-
void sigill_handler(int signal, siginfo_t *siginfo, os_context_t *context);
void sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context);
void memory_fault_handler(int signal, siginfo_t *siginfo,