efi_loader: mark started images

In UnloadImage() we need to know if an image is already started.

Add a field to the handle structure identifying loaded and started images.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

include/efi_loader.h

@@ -179,6 +179,18 @@ struct efi_handler {
 	struct list_head open_infos;
 };
 
+/**
+ * enum efi_object_type - type of EFI object
+ *
+ * In UnloadImage we must be able to identify if the handle relates to a
+ * started image.
+ */
+enum efi_object_type {
+	EFI_OBJECT_TYPE_UNDEFINED = 0,
+	EFI_OBJECT_TYPE_LOADED_IMAGE,
+	EFI_OBJECT_TYPE_STARTED_IMAGE,
+};
+
 /**
  * struct efi_object - dereferenced EFI handle
  *
@@ -201,6 +213,7 @@ struct efi_object {
 	struct list_head link;
 	/* The list of protocols */
 	struct list_head protocols;
+	enum efi_object_type type;
 };
 
 /**

lib/efi_loader/efi_boottime.c

@@ -1554,6 +1554,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
 		free(info);
 		return EFI_OUT_OF_RESOURCES;
 	}
+	obj->header.type = EFI_OBJECT_TYPE_LOADED_IMAGE;
 
 	/* Add internal object to object list */
 	efi_add_handle(&obj->header);
@@ -2678,6 +2679,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 	}
 
 	current_image = image_handle;
+	image_obj->header.type = EFI_OBJECT_TYPE_STARTED_IMAGE;
 	EFI_PRINT("Jumping into 0x%p\n", image_obj->entry);
 	ret = EFI_CALL(image_obj->entry(image_handle, &systab));