gdb/mn10300: Use default gdbarch methods where possible

Make use of the default gdbarch methods for gdbarch_dummy_id,
gdbarch_unwind_pc, 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:

	* mn10300-tdep.c (mn10300_dummy_id): Delete.
	(mn10300_unwind_pc): Delete.
	(mn10300_unwind_sp): Delete.
	(mn10300_push_dummy_call): Use gdbarch_unwind_sp not
	mn10300_unwind_sp.
	(mn10300_frame_unwind_init): Don't register deleted functions with
	gdbarch.

2 files changed, 11 insertions, 31 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f819b1b..c2539c5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,15 @@
 2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
 
+	* mn10300-tdep.c (mn10300_dummy_id): Delete.
+	(mn10300_unwind_pc): Delete.
+	(mn10300_unwind_sp): Delete.
+	(mn10300_push_dummy_call): Use gdbarch_unwind_sp not
+	mn10300_unwind_sp.
+	(mn10300_frame_unwind_init): Don't register deleted functions with
+	gdbarch.
+
+2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
+
 	* mep-tdep.c (mep_unwind_pc): Delete.
 	(mep_unwind_sp): Delete.
 	(mep_dummy_id): Delete.
diff --git a/gdb/mn10300-tdep.c b/gdb/mn10300-tdep.c
index 583827e..1a08ea0 100644
--- a/gdb/mn10300-tdep.c
+++ b/gdb/mn10300-tdep.c
@@ -1098,15 +1098,6 @@ mn10300_frame_base (struct frame_info *this_frame, void **this_prologue_cache)
     }
 }
 
-/* Here is a dummy implementation.  */
-static struct frame_id
-mn10300_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
-  CORE_ADDR pc = get_frame_register_unsigned (this_frame, E_PC_REGNUM);
-  return frame_id_build (sp, pc);
-}
-
 static void
 mn10300_frame_this_id (struct frame_info *this_frame,
 		       void **this_prologue_cache,
@@ -1149,32 +1140,11 @@ static const struct frame_unwind mn10300_frame_unwind = {
   default_frame_sniffer
 };
 
-static CORE_ADDR
-mn10300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  ULONGEST pc;
-
-  pc = frame_unwind_register_unsigned (this_frame, E_PC_REGNUM);
-  return pc;
-}
-
-static CORE_ADDR
-mn10300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  ULONGEST sp;
-
-  sp = frame_unwind_register_unsigned (this_frame, E_SP_REGNUM);
-  return sp;
-}
-
 static void
 mn10300_frame_unwind_init (struct gdbarch *gdbarch)
 {
   dwarf2_append_unwinders (gdbarch);
   frame_unwind_append_unwinder (gdbarch, &mn10300_frame_unwind);
-  set_gdbarch_dummy_id (gdbarch, mn10300_dummy_id);
-  set_gdbarch_unwind_pc (gdbarch, mn10300_unwind_pc);
-  set_gdbarch_unwind_sp (gdbarch, mn10300_unwind_sp);
 }
 
 /* Function: push_dummy_call
@@ -1308,7 +1278,7 @@ mn10300_push_dummy_call (struct gdbarch *gdbarch,
   {
     CORE_ADDR func_addr = find_function_addr (target_func, NULL);
     CORE_ADDR unwound_sp 
-      = mn10300_unwind_sp (gdbarch, create_new_frame (sp, func_addr));
+      = gdbarch_unwind_sp (gdbarch, create_new_frame (sp, func_addr));
     if (sp != unwound_sp)
       regcache_cooked_write_unsigned (regcache, E_SP_REGNUM,
                                       sp - (unwound_sp - sp));