gdb/m32r: 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:

	* m32r-tdep.c (m32r_unwind_sp): Delete.
	(m32r_unwind_pc): Delete.
	(m32r_dummy_id): Delete.
	(m32r_gdbarch_init): Don't register deleted functions with
	gdbarch.

2 files changed, 8 insertions, 37 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c4bdedb..7000944 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
 
+	* m32r-tdep.c (m32r_unwind_sp): Delete.
+	(m32r_unwind_pc): Delete.
+	(m32r_dummy_id): Delete.
+	(m32r_gdbarch_init): Don't register deleted functions with
+	gdbarch.
+
+2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
+
 	* m32c-tdep.c (m32c_unwind_pc): Delete.
 	(m32c_unwind_sp): Delete.
 	(m32c_dummy_id): Delete.
diff --git a/gdb/m32r-tdep.c b/gdb/m32r-tdep.c
index 18acdb6..a10558d 100644
--- a/gdb/m32r-tdep.c
+++ b/gdb/m32r-tdep.c
@@ -649,13 +649,6 @@ m32r_frame_unwind_cache (struct frame_info *this_frame,
 }
 
 static CORE_ADDR
-m32r_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  return frame_unwind_register_unsigned (next_frame, M32R_SP_REGNUM);
-}
-
-
-static CORE_ADDR
 m32r_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
 		      struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
 		      struct value **args, CORE_ADDR sp,
@@ -798,14 +791,6 @@ m32r_return_value (struct gdbarch *gdbarch, struct value *function,
     }
 }
 
-
-
-static CORE_ADDR
-m32r_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  return frame_unwind_register_unsigned (next_frame, M32R_PC_REGNUM);
-}
-
 /* Given a GDB frame, determine the address of the calling function's
    frame.  This will be used to create a new GDB frame struct.  */
 
@@ -872,18 +857,6 @@ static const struct frame_base m32r_frame_base = {
   m32r_frame_base_address
 };
 
-/* Assuming THIS_FRAME is a dummy, return the frame ID of that dummy
-   frame.  The frame ID's base needs to match the TOS value saved by
-   save_dummy_frame_tos(), and the PC match the dummy frame's breakpoint.  */
-
-static struct frame_id
-m32r_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  CORE_ADDR sp = get_frame_register_unsigned (this_frame, M32R_SP_REGNUM);
-  return frame_id_build (sp, get_frame_pc (this_frame));
-}
-
-
 static gdbarch_init_ftype m32r_gdbarch_init;
 
 static struct gdbarch *
@@ -904,8 +877,6 @@ m32r_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_wchar_bit (gdbarch, 16);
   set_gdbarch_wchar_signed (gdbarch, 0);
 
-  set_gdbarch_unwind_sp (gdbarch, m32r_unwind_sp);
-
   set_gdbarch_num_regs (gdbarch, M32R_NUM_REGS);
   set_gdbarch_pc_regnum (gdbarch, M32R_PC_REGNUM);
   set_gdbarch_sp_regnum (gdbarch, M32R_SP_REGNUM);
@@ -928,14 +899,6 @@ m32r_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   frame_base_set_default (gdbarch, &m32r_frame_base);
 
-  /* Methods for saving / extracting a dummy frame's ID.  The ID's
-     stack address must match the SP value returned by
-     PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos.  */
-  set_gdbarch_dummy_id (gdbarch, m32r_dummy_id);
-
-  /* Return the unwound PC value.  */
-  set_gdbarch_unwind_pc (gdbarch, m32r_unwind_pc);
-
   /* Hook in ABI-specific overrides, if they have been registered.  */
   gdbarch_init_osabi (info, gdbarch);