+/* A default unwind_pc callback that simply unwinds the register identified
+ by GDBARCH_PC_REGNUM. */
+
+extern CORE_ADDR default_unwind_pc (struct gdbarch *gdbarch,
+ struct frame_info *next_frame);
+
+/* A default unwind_sp callback that simply unwinds the register identified
+ by GDBARCH_SP_REGNUM. */
+
+extern CORE_ADDR default_unwind_sp (struct gdbarch *gdbarch,
+ struct frame_info *next_frame);
+