[PATCH] Remove MAX_REGISTER_SIZE from target.c

[Alan Hayward <Alan.Hayward@arm.com>]

Avoid copying the register in debug_print_register by moving the func
into regcache.

Tested using make check with board files unix and native-gdbserver.

Ok to commit?

Alan.

2017-02-24  Alan Hayward  <alan.hayward@arm.com>

	* regcache.c (regcache_debug_print_register): New function.
	* regcache.h (regcache_debug_print_register): New declaration.
	* target.c (debug_print_register): Remove.
	(target_fetch_registers): Call regcache_debug_print_register.
	(target_store_registers): Likewise.


diff --git a/gdb/regcache.h b/gdb/regcache.h
index e1495f61426f879386b905ab1e97421bdd061bf5..59233308f926ebd52db9958cba168daacc77c1ee 100644
--- a/gdb/regcache.h
+++ b/gdb/regcache.h
@@ -232,4 +232,8 @@ extern void regcache_cpy (struct regcache *dest, struct regcache *src);
 extern void registers_changed (void);
 extern void registers_changed_ptid (ptid_t);

+extern void regcache_debug_print_register (const char *func,
+					   struct regcache *regcache,
+					   int regno);
+
 #endif /* REGCACHE_H */
diff --git a/gdb/regcache.c b/gdb/regcache.c
index f190eda0e47c5c03744fc26263505d1c30ea1ee8..31aa1baf7ef69c27c00e45e3c8d4eb3c41dc4203 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -1259,6 +1259,42 @@ regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
   reinit_frame_cache ();
 }

+void
+regcache_debug_print_register (const char *func, struct regcache *regcache,
+			       int regno)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+
+  fprintf_unfiltered (gdb_stdlog, "%s ", func);
+  if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
+      && gdbarch_register_name (gdbarch, regno) != NULL
+      && gdbarch_register_name (gdbarch, regno)[0] != '\0')
+    fprintf_unfiltered (gdb_stdlog, "(%s)",
+			gdbarch_register_name (gdbarch, regno));
+  else
+    fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
+  if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
+    {
+      enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+      int i, size = register_size (gdbarch, regno);
+      gdb_byte *buf = register_buffer (regcache, regno);
+
+      regcache_raw_collect (regcache, regno, buf);
+      fprintf_unfiltered (gdb_stdlog, " = ");
+      for (i = 0; i < size; i++)
+	{
+	  fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
+	}
+      if (size <= sizeof (LONGEST))
+	{
+	  ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
+
+	  fprintf_unfiltered (gdb_stdlog, " %s %s",
+			      core_addr_to_string_nz (val), plongest (val));
+	}
+    }
+  fprintf_unfiltered (gdb_stdlog, "\n");
+}

 static void
 reg_flush_command (char *command, int from_tty)
diff --git a/gdb/target.c b/gdb/target.c
index 0ff8515d3b731ff5929e5c9c68a20d124c1ecd67..7c286ab6bf821ced42a0c1ac945343b761a37157 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -3547,49 +3547,12 @@ target_options_to_string (int target_options)
   return ret;
 }

-static void
-debug_print_register (const char * func,
-		      struct regcache *regcache, int regno)
-{
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
-
-  fprintf_unfiltered (gdb_stdlog, "%s ", func);
-  if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
-      && gdbarch_register_name (gdbarch, regno) != NULL
-      && gdbarch_register_name (gdbarch, regno)[0] != '\0')
-    fprintf_unfiltered (gdb_stdlog, "(%s)",
-			gdbarch_register_name (gdbarch, regno));
-  else
-    fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
-  if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
-    {
-      enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-      int i, size = register_size (gdbarch, regno);
-      gdb_byte buf[MAX_REGISTER_SIZE];
-
-      regcache_raw_collect (regcache, regno, buf);
-      fprintf_unfiltered (gdb_stdlog, " = ");
-      for (i = 0; i < size; i++)
-	{
-	  fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
-	}
-      if (size <= sizeof (LONGEST))
-	{
-	  ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
-
-	  fprintf_unfiltered (gdb_stdlog, " %s %s",
-			      core_addr_to_string_nz (val), plongest (val));
-	}
-    }
-  fprintf_unfiltered (gdb_stdlog, "\n");
-}
-
 void
 target_fetch_registers (struct regcache *regcache, int regno)
 {
   current_target.to_fetch_registers (&current_target, regcache, regno);
   if (targetdebug)
-    debug_print_register ("target_fetch_registers", regcache, regno);
+    regcache_debug_print_register ("target_fetch_registers", regcache, regno);
 }

 void
@@ -3601,7 +3564,8 @@ target_store_registers (struct regcache *regcache, int regno)
   current_target.to_store_registers (&current_target, regcache, regno);
   if (targetdebug)
     {
-      debug_print_register ("target_store_registers", regcache, regno);
+      regcache_debug_print_register ("target_store_registers", regcache,
+				     regno);
     }
 }