Index: ada-lang.c
===================================================================
RCS file: /cvs/src/src/gdb/ada-lang.c,v
retrieving revision 1.234
diff -u -p -u -r1.234 ada-lang.c
--- ada-lang.c	19 Nov 2009 22:45:56 -0000	1.234
+++ ada-lang.c	25 Nov 2009 21:10:03 -0000
@@ -2289,9 +2289,8 @@ ada_value_assign (struct value *toval, s
         move_bits (buffer, value_bitpos (toval),
 		   value_contents (fromval), 0, bits, 0);
       write_memory (to_addr, buffer, len);
-      if (deprecated_memory_changed_hook)
-	deprecated_memory_changed_hook (to_addr, len);
-      
+      observer_notify_memory_changed (to_addr, len, buffer);
+
       val = value_copy (toval);
       memcpy (value_contents_raw (val), value_contents (fromval),
               TYPE_LENGTH (type));
Index: defs.h
===================================================================
RCS file: /cvs/src/src/gdb/defs.h,v
retrieving revision 1.257
diff -u -p -u -r1.257 defs.h
--- defs.h	21 Oct 2009 18:02:25 -0000	1.257
+++ defs.h	25 Nov 2009 21:10:03 -0000
@@ -1108,7 +1108,6 @@ extern void (*deprecated_readline_begin_
 extern char *(*deprecated_readline_hook) (char *);
 extern void (*deprecated_readline_end_hook) (void);
 extern void (*deprecated_register_changed_hook) (int regno);
-extern void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
 extern void (*deprecated_context_hook) (int);
 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
 					      struct target_waitstatus *status,
Index: interps.c
===================================================================
RCS file: /cvs/src/src/gdb/interps.c,v
retrieving revision 1.32
diff -u -p -u -r1.32 interps.c
--- interps.c	6 Feb 2009 21:33:58 -0000	1.32
+++ interps.c	25 Nov 2009 21:10:03 -0000
@@ -343,7 +343,6 @@ clear_interpreter_hooks (void)
   deprecated_readline_hook = 0;
   deprecated_readline_end_hook = 0;
   deprecated_register_changed_hook = 0;
-  deprecated_memory_changed_hook = 0;
   deprecated_context_hook = 0;
   deprecated_target_wait_hook = 0;
   deprecated_call_command_hook = 0;
Index: top.c
===================================================================
RCS file: /cvs/src/src/gdb/top.c,v
retrieving revision 1.173
diff -u -p -u -r1.173 top.c
--- top.c	5 Nov 2009 20:43:52 -0000	1.173
+++ top.c	25 Nov 2009 21:10:03 -0000
@@ -259,9 +259,6 @@ void (*deprecated_interactive_hook) (voi
    that several registers have changed (see value_assign). */
 void (*deprecated_register_changed_hook) (int regno);
 
-/* Tell the GUI someone changed LEN bytes of memory at ADDR */
-void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
-
 /* Called when going to wait for the target.  Usually allows the GUI to run
    while waiting for target events.  */
 
Index: valops.c
===================================================================
RCS file: /cvs/src/src/gdb/valops.c,v
retrieving revision 1.227
diff -u -p -u -r1.227 valops.c
--- valops.c	10 Nov 2009 22:17:58 -0000	1.227
+++ valops.c	25 Nov 2009 21:10:03 -0000
@@ -861,8 +861,8 @@ value_assign (struct value *toval, struc
 	  }
 
 	write_memory (changed_addr, dest_buffer, changed_len);
-	if (deprecated_memory_changed_hook)
-	  deprecated_memory_changed_hook (changed_addr, changed_len);
+	observer_notify_memory_changed (changed_addr, changed_len,
+					dest_buffer);
       }
       break;
 
Index: doc/observer.texi
===================================================================
RCS file: /cvs/src/src/gdb/doc/observer.texi,v
retrieving revision 1.27
diff -u -p -u -r1.27 observer.texi
--- doc/observer.texi	19 Oct 2009 09:51:42 -0000	1.27
+++ doc/observer.texi	25 Nov 2009 21:10:03 -0000
@@ -208,6 +208,11 @@ Either @value{GDBN} detached from the in
 exited.  The argument @var{pid} identifies the inferior.
 @end deftypefun
 
+@deftypefun void memory_changed (CORE_ADDR @var{addr}, int @var{len}, const bfd_byte *@var{data})
+Bytes from @var{data} to @var{data} + @var{len} have been written
+to the current inferior at @var{addr}.
+@end deftypefun
+
  @deftypefun void test_notification (int @var{somearg})
 This observer is used for internal testing.  Do not use.  
 See testsuite/gdb.gdb/observer.exp.
Index: gdbtk/generic/gdbtk-hooks.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbtk/generic/gdbtk-hooks.c,v
retrieving revision 1.49
diff -u -p -u -r1.49 gdbtk-hooks.c
--- gdbtk/generic/gdbtk-hooks.c	24 May 2009 08:38:27 -0000	1.49
+++ gdbtk/generic/gdbtk-hooks.c	25 Nov 2009 21:10:03 -0000
@@ -94,7 +94,8 @@ static void gdbtk_pre_add_symbol (const 
 static void gdbtk_print_frame_info (struct symtab *, int, int, int);
 static void gdbtk_post_add_symbol (void);
 static void gdbtk_register_changed (int regno);
-static void gdbtk_memory_changed (CORE_ADDR addr, int len);
+static void gdbtk_memory_changed (CORE_ADDR addr, int len,
+				  const bfd_byte *data);
 static void gdbtk_selected_frame_changed (int);
 static void gdbtk_context_change (int);
 static void gdbtk_error_begin (void);
@@ -129,6 +130,7 @@ gdbtk_add_hooks (void)
   observer_attach_tracepoint_modified (gdbtk_modify_tracepoint);
   observer_attach_tracepoint_deleted (gdbtk_delete_tracepoint);
   observer_attach_architecture_changed (gdbtk_architecture_changed);
+  observer_attach_memory_changed (gdbtk_memory_changed);
 
   /* Hooks */
   deprecated_call_command_hook = gdbtk_call_command;
@@ -158,7 +160,6 @@ gdbtk_add_hooks (void)
   deprecated_detach_hook            = gdbtk_detach;
 
   deprecated_register_changed_hook = gdbtk_register_changed;
-  deprecated_memory_changed_hook = gdbtk_memory_changed;
   deprecated_selected_frame_level_changed_hook = gdbtk_selected_frame_changed;
   deprecated_context_hook = gdbtk_context_change;
 
@@ -393,7 +394,7 @@ gdbtk_register_changed (int regno)
 }
 
 static void
-gdbtk_memory_changed (CORE_ADDR addr, int len)
+gdbtk_memory_changed (CORE_ADDR addr, int len, const bfd_byte *data)
 {
   if (Tcl_Eval (gdbtk_interp, "gdbtk_memory_changed") != TCL_OK)
     report_error ();