-/* Call ptrace (REQ, ID, ADDR, DATA, BUF). Return success. */
+/* Call ptrace (REQ, ID, ADDR, DATA, BUF) or
+ ptrace64 (REQ, ID, ADDR, DATA, BUF) if HAVE_PTRACE64.
+ Return success. */
+
+#ifdef HAVE_PTRACE64
+# define ptrace(request, pid, addr, data, buf) \
+ ptrace64 (request, pid, addr, data, buf)
+# define addr_ptr long long
+#else
+# define addr_ptr int *
+#endif