gdb/cris: 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:

	* gdb/cris-tdep.c (cris_dummy_id): Delete.
	(cris_unwind_pc): Delete.
	(cris_unwind_sp): Delete.
	(cris_gdbarch_init): Don't register deleted functions with
	gdbarch.

2 files changed, 8 insertions, 40 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4b4d338..4d4ad2c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2019-02-27  Andrew Burgess  <andrew.burgess@embecosm.com>
 
+	* gdb/cris-tdep.c (cris_dummy_id): Delete.
+	(cris_unwind_pc): Delete.
+	(cris_unwind_sp): Delete.
+	(cris_gdbarch_init): Don't register deleted functions with
+	gdbarch.
+
+2019-02-27  Andrew Burgess  <andrew.burgess@embecosm.com>
+
 	* gdb/bfin-tdep.c (bfin_dummy_id): Delete.
 	(bfin_unwind_pc): Delete.
 	(bfin_gdbarch_init): Don't register deleted functions with gdbarch.
diff --git a/gdb/cris-tdep.c b/gdb/cris-tdep.c
index 48bdcac..8eda058 100644
--- a/gdb/cris-tdep.c
+++ b/gdb/cris-tdep.c
@@ -651,12 +651,6 @@ static CORE_ADDR crisv32_scan_prologue (CORE_ADDR pc,
 					struct frame_info *this_frame,
 					struct cris_unwind_cache *info);
 
-static CORE_ADDR cris_unwind_pc (struct gdbarch *gdbarch, 
-				 struct frame_info *next_frame);
-
-static CORE_ADDR cris_unwind_sp (struct gdbarch *gdbarch, 
-				 struct frame_info *next_frame);
-
 /* When arguments must be pushed onto the stack, they go on in reverse
    order.  The below implements a FILO (stack) to do this.
    Copied from d10v-tdep.c.  */
@@ -767,18 +761,6 @@ cris_frame_prev_register (struct frame_info *this_frame,
   return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
 }
 
-/* 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
-cris_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  CORE_ADDR sp;
-  sp = get_frame_register_unsigned (this_frame, gdbarch_sp_regnum (gdbarch));
-  return frame_id_build (sp, get_frame_pc (this_frame));
-}
-
 static CORE_ADDR
 cris_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
 {
@@ -1372,24 +1354,6 @@ cris_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
   return pc_after_prologue;
 }
 
-static CORE_ADDR
-cris_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  ULONGEST pc;
-  pc = frame_unwind_register_unsigned (next_frame,
-				       gdbarch_pc_regnum (gdbarch));
-  return pc;
-}
-
-static CORE_ADDR
-cris_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  ULONGEST sp;
-  sp = frame_unwind_register_unsigned (next_frame,
-				       gdbarch_sp_regnum (gdbarch));
-  return sp;
-}
-
 /* Implement the breakpoint_kind_from_pc gdbarch method.  */
 
 static int
@@ -4095,10 +4059,6 @@ cris_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_breakpoint_kind_from_pc (gdbarch, cris_breakpoint_kind_from_pc);
   set_gdbarch_sw_breakpoint_from_kind (gdbarch, cris_sw_breakpoint_from_kind);
   
-  set_gdbarch_unwind_pc (gdbarch, cris_unwind_pc);
-  set_gdbarch_unwind_sp (gdbarch, cris_unwind_sp);
-  set_gdbarch_dummy_id (gdbarch, cris_dummy_id);
-
   if (tdep->cris_dwarf2_cfi == 1)
     {
       /* Hook in the Dwarf-2 frame sniffer.  */