2006-03-03  Andrew Stubbs  <andrew.stubbs@st.com>

	* value.h (struct internalvar): Add field 'endian'.
	* value.c (lookup_internalvar): Initialise endian.
	(value_of_internalvar): Flip the endian of built-in types if required.
	(set_internalvar): Set the endian.
	(show_convenience): Access the value through value_of_internalvar().


Index: src/gdb/value.c
===================================================================
--- src.orig/gdb/value.c	2006-03-03 17:16:03.000000000 +0000
+++ src/gdb/value.c	2006-03-03 17:16:20.000000000 +0000
@@ -755,6 +755,7 @@ lookup_internalvar (char *name)
   var = (struct internalvar *) xmalloc (sizeof (struct internalvar));
   var->name = concat (name, (char *)NULL);
   var->value = allocate_value (builtin_type_void);
+  var->endian = TARGET_BYTE_ORDER;
   release_value (var->value);
   var->next = internalvars;
   internalvars = var;
@@ -765,12 +766,49 @@ struct value *
 value_of_internalvar (struct internalvar *var)
 {
   struct value *val;
+  int i, j;
+  gdb_byte temp;
+  gdb_byte *array;
 
   val = value_copy (var->value);
   if (value_lazy (val))
     value_fetch_lazy (val);
   VALUE_LVAL (val) = lval_internalvar;
   VALUE_INTERNALVAR (val) = var;
+
+  /* Values are always stored in the target's byte order.  When connected to a
+     target this will most likely always be correct, so there's normally no
+     need to worry about it.
+
+     However, internal variables can be set up before the target endian is
+     known and so may become out of date.  Fix it up before anybody sees.
+
+     Since internal variables cannot hold complex types, such as structs,
+     unions, arrays and strings - those are always held in target memory and
+     the variable just holds a reference, there is no need to worry about
+     those either.
+
+     Floating point values vary differently across endianness - many targets
+     just keep them the same.  If they do no work correctly on your host/target
+     then add support as required here.  */
+  if (var->endian != TARGET_BYTE_ORDER)
+    {
+      array = value_contents_raw (val);
+      switch (TYPE_CODE (value_type (val)))
+        {
+        case TYPE_CODE_INT:
+        case TYPE_CODE_PTR:
+          /* Reverse the bytes.  */
+          for (i=0,j=TYPE_LENGTH (value_enclosing_type (val))-1; i<j; i++,j--)
+	    {
+	      temp = array[j];
+	      array[j] = array[i];
+	      array[i] = temp;
+	    }
+	  break;
+	}
+    }
+
   return val;
 }
 
@@ -809,6 +847,7 @@ set_internalvar (struct internalvar *var
      long.  */
   xfree (var->value);
   var->value = newval;
+  var->endian = TARGET_BYTE_ORDER;
   release_value (newval);
   /* End code which must not call error().  */
 }
@@ -877,7 +916,7 @@ show_convenience (char *ignore, int from
 	  varseen = 1;
 	}
       printf_filtered (("$%s = "), var->name);
-      value_print (var->value, gdb_stdout, 0, Val_pretty_default);
+      value_print (value_of_internalvar (var), gdb_stdout, 0, Val_pretty_default);
       printf_filtered (("\n"));
     }
   if (!varseen)
Index: src/gdb/value.h
===================================================================
--- src.orig/gdb/value.h	2006-02-20 18:39:55.000000000 +0000
+++ src/gdb/value.h	2006-03-03 15:11:42.000000000 +0000
@@ -245,6 +245,7 @@ struct internalvar
   struct internalvar *next;
   char *name;
   struct value *value;
+  int endian;
 };