[PATCH 12/25] gdb/nios2: Use default gdbarch methods where possible

[Andrew Burgess <andrew dot burgess at embecosm dot com>]

Make use of the default gdbarch methods for gdbarch_dummy_id, and
gdbarch_unwind_sp where possible.

I have not tested this change but, by inspecting the code, I believe
the default methods are equivalent to the code being deleted.

gdb/ChangeLog:

	* nios2-tdep.c (nios2_dummy_id): Delete.
	(nios2_unwind_sp): Delete.
	(nios2_gdbarch_init): Don't register deleted functions with
	gdbarch.
---
 gdb/ChangeLog    |  7 +++++++
 gdb/nios2-tdep.c | 20 --------------------
 2 files changed, 7 insertions(+), 20 deletions(-)

diff --git a/gdb/nios2-tdep.c b/gdb/nios2-tdep.c
index ee45db98af6..7f18828b5a8 100644
--- a/gdb/nios2-tdep.c
+++ b/gdb/nios2-tdep.c
@@ -1795,16 +1795,6 @@ nios2_return_value (struct gdbarch *gdbarch, struct value *function,
   return RETURN_VALUE_REGISTER_CONVENTION;
 }
 
-/* Implement the dummy_id gdbarch method.  */
-
-static struct frame_id
-nios2_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  return frame_id_build
-    (get_frame_register_unsigned (this_frame, NIOS2_SP_REGNUM),
-     get_frame_pc (this_frame));
-}
-
 /* Implement the push_dummy_call gdbarch method.  */
 
 static CORE_ADDR
@@ -1896,14 +1886,6 @@ nios2_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
   return extract_typed_address (buf, builtin_type (gdbarch)->builtin_func_ptr);
 }
 
-/* Implement the unwind_sp gdbarch method.  */
-
-static CORE_ADDR
-nios2_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  return frame_unwind_register_unsigned (this_frame, NIOS2_SP_REGNUM);
-}
-
 /* Use prologue analysis to fill in the register cache
    *THIS_PROLOGUE_CACHE for THIS_FRAME.  This function initializes
    *THIS_PROLOGUE_CACHE first.  */
@@ -2356,9 +2338,7 @@ nios2_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_breakpoint_kind_from_pc (gdbarch, nios2_breakpoint_kind_from_pc);
   set_gdbarch_sw_breakpoint_from_kind (gdbarch, nios2_sw_breakpoint_from_kind);
 
-  set_gdbarch_dummy_id (gdbarch, nios2_dummy_id);
   set_gdbarch_unwind_pc (gdbarch, nios2_unwind_pc);
-  set_gdbarch_unwind_sp (gdbarch, nios2_unwind_sp);
 
   /* The dwarf2 unwinder will normally produce the best results if
      the debug information is available, so register it first.  */
-- 
2.14.5