/* FIXME: Stolen from CMUCL. Investigate. */
typedef unsigned long os_vm_address_t;
-typedef long os_vm_size_t;
+typedef size_t os_vm_size_t;
typedef off_t os_vm_offset_t;
typedef int os_vm_prot_t;
#define OS_VM_PROT_WRITE PROT_WRITE
#define OS_VM_PROT_EXECUTE PROT_EXEC
-/* Yaargh?! */
-typedef int os_context_register_t ;
+#define SIG_MEMORY_FAULT SIGSEGV
+
+#define SIG_STOP_FOR_GC (SIGUSR2)