Add free_image

src/core/image.c

@@ -89,6 +89,23 @@ struct image * find_image ( const char *name ) {
 	return NULL;
 }
 
+/**
+ * Free loaded image
+ *
+ * @v image		Executable/loadable image
+ *
+ * This releases the memory being used to store the image; it does not
+ * release the @c struct @c image itself, nor does it unregister the
+ * image.
+ */
+void free_image ( struct image *image ) {
+	if ( image->free )
+		image->free ( image->data );
+	image->free = NULL;
+	image->data = UNULL;
+	image->len = 0;
+}
+
 /**
  * Load executable/loadable image into memory
  *

src/include/gpxe/image.h

@@ -109,6 +109,7 @@ extern struct list_head images;
 extern int register_image ( struct image *image );
 extern void unregister_image ( struct image *image );
 struct image * find_image ( const char *name );
+extern void free_image ( struct image *image );
 extern int image_load ( struct image *image );
 extern int image_autoload ( struct image *image );
 extern int image_exec ( struct image *image );