GDB/MI: Document support for -exec-run --start in -list-features

[deliverable/binutils-gdb.git] / gdb / frame-unwind.c

diff --git a/gdb/frame-unwind.c b/gdb/frame-unwind.c
index 68879f30816dbbdca26e28c3ffc14add779b8060..8fabf52c549eba70b9e5e1d843d593bce7078e29 100644 (file)
--- a/gdb/frame-unwind.c
+++ b/gdb/frame-unwind.c
@@ -143,14 +143,18 @@ default_frame_sniffer (const struct frame_unwind *self,
   return 1;
 }
 
-/* A default frame unwinder stop_reason callback that always claims
-   the frame is unwindable.  */
+/* The default frame unwinder stop_reason callback.  */
 
 enum unwind_stop_reason
 default_frame_unwind_stop_reason (struct frame_info *this_frame,
                                  void **this_cache)
 {
-  return UNWIND_NO_REASON;
+  struct frame_id this_id = get_frame_id (this_frame);
+
+  if (frame_id_eq (this_id, outer_frame_id))
+    return UNWIND_OUTERMOST;
+  else
+    return UNWIND_NO_REASON;
 }
 
 /* Helper functions for value-based register unwinding.  These return
@@ -161,11 +165,18 @@ default_frame_unwind_stop_reason (struct frame_info *this_frame,
 struct value *
 frame_unwind_got_optimized (struct frame_info *frame, int regnum)
 {
+  struct gdbarch *gdbarch = frame_unwind_arch (frame);
+  struct type *type = register_type (gdbarch, regnum);
   struct value *val;
 
-  val = value_of_register_lazy (frame, regnum);
+  /* Return an lval_register value, so that we print it as
+     "<not saved>".  */
+  val = allocate_value_lazy (type);
   set_value_lazy (val, 0);
   set_value_optimized_out (val, 1);
+  VALUE_LVAL (val) = lval_register;
+  VALUE_REGNUM (val) = regnum;
+  VALUE_FRAME_ID (val) = get_frame_id (frame);
   return val;
 }