Simplify xfer_part

Since xfer_part is already a class method, and only
{raw,cooked}_{read,write} are passed to it.  We can remove these two
arguments, but add a bool argument is_raw, indicating raw registers or
cooked registers are accessed.

gdb:

2017-10-03  Yao Qi  <yao.qi@linaro.org>
:
	* regcache.c (typedef void):
	(regcache::xfer_part):
	(regcache::xfer_part):
	(enum register_status):
	(regcache::raw_write_part):
	(enum register_status):
	(regcache::cooked_write_part):
	(regcache_raw_supply): -
	(regcache_raw_supply): +
	(aarch32_gp_regcache_supply): -
	(aarch32_gp_regcache_supply): +
	(aarch32_gp_regcache_supply):
	(aarch32_gp_regcache_collect): -
	(aarch32_gp_regcache_collect): +
	(aarch32_gp_regcache_collect):
	(aarch32_vfp_regcache_supply): -
	(aarch32_vfp_regcache_supply): +
	(aarch32_vfp_regcache_supply):
	(aarch32_vfp_regcache_collect): -
	(aarch32_vfp_regcache_collect): +
	(aarch64_get_debug_reg_state):
	(fetch_gregs_from_thread): -
	(fetch_gregs_from_thread): +
	(fetch_gregs_from_thread):
	(store_gregs_to_thread): -
	(store_gregs_to_thread): +
	(store_gregs_to_thread):
	(fetch_fpregs_from_thread): -
	(fetch_fpregs_from_thread): +
	(fetch_fpregs_from_thread):
	(store_fpregs_to_thread): -
	(store_fpregs_to_thread): +
	(store_fpregs_to_thread):
	(aarch64_linux_fetch_inferior_registers):
	(default_addressable_memory_unit_size):
	(extern const char *default_gnu_triplet_regexp):
	(static struct tramp_frame arm_kernel_linux_restart_syscall_tramp_frame = {):
	(arm_linux_supply_gregset):
	(arm_linux_collect_gregset):
	(supply_nwfpe_register): -
	(supply_nwfpe_register): +
	(supply_nwfpe_register):
	(collect_nwfpe_register): -
	(collect_nwfpe_register): +
	(collect_nwfpe_register):
	(arm_linux_supply_nwfpe):
	(arm_linux_collect_nwfpe):
	(arm_linux_supply_vfp):
	(void arm_linux_collect_gregset):
	(core_detach):
	(get_core_register_section): -
	(get_core_register_section): +
	(get_core_registers_cb):
	(set_gdbarch_fast_tracepoint_valid_at):
	(gdbarch_guess_tracepoint_registers): -
	(gdbarch_guess_tracepoint_registers): +
	(extern void set_gdbarch_fast_tracepoint_valid_at):
	(m;int;fast_tracepoint_valid_at;CORE_ADDR addr, char **msg;addr, msg;;default_fas):
	(struct core_fns):
	(store_waitstatus):
	(inf_child_fetch_inferior_registers):
	(inf_child_post_attach):
	(static CORE_ADDR):
	(inf_ptrace_fetch_register): -
	(inf_ptrace_fetch_register): +
	(inf_ptrace_fetch_register):
	(inf_ptrace_fetch_registers):
	(inf_ptrace_store_register): -
	(inf_ptrace_store_register): +
	(inf_ptrace_store_register):
	(record_btrace_remove_breakpoint):
	(record_btrace_fetch_registers):
	(record_btrace_store_registers):
	(static void record_full_save):
	(record_full_reg_alloc): -
	(record_full_reg_alloc): +
	(record_full_get_loc):
	(record_full_arch_list_add_reg): -
	(record_full_arch_list_add_reg): +
	(record_full_supports_stopped_by_hw_breakpoint):
	(record_full_registers_change): -
	(record_full_registers_change): +
	(record_full_registers_change):
	(record_full_core_kill):
	(record_full_core_fetch_registers):
	(record_full_core_prepare_to_store):
	(regcache_register_size):
	(regcache::regcache):
	(regcache::arch):
	(regcache_get_ptid): -
	(regcache_get_ptid): +
	(class regcache_invalidator):
	(public:):
	(public:):
	(get_regcache_arch): -
	(get_regcache_arch): +
	(regcache_dup):
	(regcache_register_status): -
	(regcache_register_status): +
	(reg_buffer::set_register_status):
	(regcache_invalidate): -
	(regcache_invalidate): +
	(registers_changed):
	(regcache_raw_update): -
	(regcache_raw_update): +
	(regcache_raw_update):
	(regcache::raw_update):
	(regcache_raw_read): -
	(regcache_raw_read): +
	(regcache_raw_read_signed):
	(regcache_raw_write_signed):
	(regcache_raw_write):
	(reg_buffer::raw_supply_zeroed):
	(regcache_raw_collect): -
	(regcache_raw_collect): +
	(reg_buffer::transfer_regset):
	(reg_buffer::supply_regset):
	(regcache_write_pc):
	(struct regcache;):
	(extern struct regcache *get_thread_arch_aspace_regcache):
	(extern enum register_status):
	(extern void regcache_write_pc):
	(enum):
	(private:):
	(public:):
	(public:):
	(public:):
	(public:):
	(private:):
	(struct regcache;):
	(static int getpkt_or_notif_sane):
	(remote_wait):
	(fetch_register_using_p): -
	(fetch_register_using_p): +
	(send_g_packet):
	(process_g_packet): -
	(process_g_packet): +
	(process_g_packet):
	(fetch_registers_using_g): -
	(fetch_registers_using_g): +
	(set_remote_traceframe):
	(remote_fetch_registers):
	(remote_prepare_to_store): -
	(remote_prepare_to_store): +
	(remote_prepare_to_store):
	(store_register_using_P): -
	(store_register_using_P): +
	(store_register_using_P):
	(store_registers_using_G): -
	(store_registers_using_G): +
	(store_registers_using_G):
	(s390_write_pc):
	(debug_wait):
	(delegate_fetch_registers): -
	(delegate_fetch_registers): +
	(tdefault_fetch_registers): -
	(tdefault_fetch_registers): +
	(debug_fetch_registers): -
	(debug_fetch_registers): +
	(delegate_store_registers): -
	(delegate_store_registers): +
	(tdefault_store_registers): -
	(tdefault_store_registers): +
	(debug_store_registers): -
	(debug_store_registers): +
	(delegate_prepare_to_store): -
	(delegate_prepare_to_store): +
	(tdefault_prepare_to_store): -
	(tdefault_prepare_to_store): +
	(debug_prepare_to_store): -
	(debug_prepare_to_store): +
	(target_options_to_string):
	(target_fetch_registers): -
	(target_fetch_registers): +
	(target_fetch_registers):
	(target_store_registers): -
	(target_store_registers): +
	(struct target_ops):
	(extern ptid_t default_target_wait):
	(traceframe_find_block_type):
	(trace_save_ctf):
	(tracefile_fetch_registers): -
	(tracefile_fetch_registers): +
	(extern struct trace_file_writer *tfile_trace_file_writer_new):

2 files changed, 14 insertions, 20 deletions

diff --git a/gdb/regcache.c b/gdb/regcache.c
index bf448ef..eb2f967 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -915,12 +915,7 @@ typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum,
 
 enum register_status
 regcache::xfer_part (int regnum, int offset, int len, void *in,
-		     const void *out,
-		     enum register_status (*read) (struct regcache *regcache,
-						   int regnum,
-						   gdb_byte *buf),
-		     void (*write) (struct regcache *regcache, int regnum,
-				    const gdb_byte *buf))
+		     const void *out, bool is_raw)
 {
   struct gdbarch *gdbarch = arch ();
   gdb_byte *reg = (gdb_byte *) alloca (register_size (gdbarch, regnum));
@@ -938,7 +933,10 @@ regcache::xfer_part (int regnum, int offset, int len, void *in,
       enum register_status status;
 
       gdb_assert (read != NULL);
-      status = read (this, regnum, reg);
+      if (is_raw)
+	status = raw_read (regnum, reg);
+      else
+	status = cooked_read (regnum, reg);
       if (status != REG_VALID)
 	return status;
     }
@@ -950,8 +948,10 @@ regcache::xfer_part (int regnum, int offset, int len, void *in,
   /* ... write (when needed).  */
   if (out != NULL)
     {
-      gdb_assert (write != NULL);
-      write (this, regnum, reg);
+      if (is_raw)
+	raw_write (regnum, reg);
+      else
+	raw_write (regnum, reg);
     }
 
   return REG_VALID;
@@ -968,8 +968,7 @@ enum register_status
 regcache::raw_read_part (int regnum, int offset, int len, gdb_byte *buf)
 {
   gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers);
-  return xfer_part (regnum, offset, len, buf, NULL,
-		    regcache_raw_read, regcache_raw_write);
+  return xfer_part (regnum, offset, len, buf, NULL, true);
 }
 
 void
@@ -984,8 +983,7 @@ regcache::raw_write_part (int regnum, int offset, int len,
 			  const gdb_byte *buf)
 {
   gdb_assert (regnum >= 0 && regnum < m_descr->nr_raw_registers);
-  xfer_part (regnum, offset, len, NULL, buf, regcache_raw_read,
-	     regcache_raw_write);
+  xfer_part (regnum, offset, len, NULL, buf, true);
 }
 
 enum register_status
@@ -1000,8 +998,7 @@ enum register_status
 regcache::cooked_read_part (int regnum, int offset, int len, gdb_byte *buf)
 {
   gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers);
-  return xfer_part (regnum, offset, len, buf, NULL,
-		    regcache_cooked_read, regcache_cooked_write);
+  return xfer_part (regnum, offset, len, buf, NULL, false);
 }
 
 void
@@ -1016,8 +1013,7 @@ regcache::cooked_write_part (int regnum, int offset, int len,
 			     const gdb_byte *buf)
 {
   gdb_assert (regnum >= 0 && regnum < m_descr->nr_cooked_registers);
-  xfer_part (regnum, offset, len, NULL, buf,
-	     regcache_cooked_read, regcache_cooked_write);
+  xfer_part (regnum, offset, len, NULL, buf, false);
 }
 
 /* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE.  */
diff --git a/gdb/regcache.h b/gdb/regcache.h
index 6f42fb9..460d83f 100644
--- a/gdb/regcache.h
+++ b/gdb/regcache.h
@@ -354,9 +354,7 @@ private:
   void restore (struct regcache *src);
 
   enum register_status xfer_part (int regnum, int offset, int len, void *in,
-				  const void *out,
-				  decltype (regcache_raw_read) read,
-				  decltype (regcache_raw_write) write);
+				  const void *out, bool is_raw);
 
   void transfer_regset (const struct regset *regset,
 			struct regcache *out_regcache,