gdb/rx: 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:

	* rx-tdep.c (rx_unwind_pc): Delete.
	(rx_unwind_sp): Delete.
	(rx_dummy_id): Delete.
	(rx_gdbarch_init): Don't register deleted functions with
	gdbarch.  Update comment.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0c8fcced6813751f7edc0dbd60506b2b48a02c8d..66193f0fa40db186ff44dbca5b09d91fe20fcf8a 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+       * rx-tdep.c (rx_unwind_pc): Delete.
+       (rx_unwind_sp): Delete.
+       (rx_dummy_id): Delete.
+       (rx_gdbarch_init): Don't register deleted functions with
+       gdbarch.  Update comment.
+
 2019-04-23  Andrew Burgess  <andrew.burgess@embecosm.com>
 
        * rs6000-tdep.c (rs6000_unwind_pc): Delete.

diff --git a/gdb/rx-tdep.c b/gdb/rx-tdep.c
index 2825c799ad8ddbf1375f566a66eef0fd05ce42a5..4cbf919db9633ece74c6a7af8d0447ad2016e7b3 100644 (file)
--- a/gdb/rx-tdep.c
+++ b/gdb/rx-tdep.c
@@ -751,35 +751,6 @@ static const struct frame_unwind rx_exception_unwind = {
   rx_exception_sniffer
 };
 
-/* Implement the "unwind_pc" gdbarch method.  */
-static CORE_ADDR
-rx_unwind_pc (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  ULONGEST pc;
-
-  pc = frame_unwind_register_unsigned (this_frame, RX_PC_REGNUM);
-  return pc;
-}
-
-/* Implement the "unwind_sp" gdbarch method.  */
-static CORE_ADDR
-rx_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  ULONGEST sp;
-
-  sp = frame_unwind_register_unsigned (this_frame, RX_SP_REGNUM);
-  return sp;
-}
-
-/* Implement the "dummy_id" gdbarch method.  */
-static struct frame_id
-rx_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  return
-    frame_id_build (get_frame_register_unsigned (this_frame, RX_SP_REGNUM),
-                   get_frame_pc (this_frame));
-}
-
 /* Implement the "push_dummy_call" gdbarch method.  */
 static CORE_ADDR
 rx_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
@@ -1112,9 +1083,6 @@ rx_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_sw_breakpoint_from_kind (gdbarch, rx_breakpoint::bp_from_kind);
   set_gdbarch_skip_prologue (gdbarch, rx_skip_prologue);
 
-  set_gdbarch_unwind_pc (gdbarch, rx_unwind_pc);
-  set_gdbarch_unwind_sp (gdbarch, rx_unwind_sp);
-
   /* Target builtin data types.  */
   set_gdbarch_char_signed (gdbarch, 0);
   set_gdbarch_short_bit (gdbarch, 16);
@@ -1147,10 +1115,8 @@ rx_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   dwarf2_append_unwinders (gdbarch);
   frame_unwind_append_unwinder (gdbarch, &rx_frame_unwind);
 
-  /* 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, rx_dummy_id);
+  /* Methods setting up a dummy call, and extracting the return value from
+     a call.  */
   set_gdbarch_push_dummy_call (gdbarch, rx_push_dummy_call);
   set_gdbarch_return_value (gdbarch, rx_return_value);