Compressed some architecture instruction properties.

2 files changed, 72 insertions, 0 deletions

diff --git a/src/glibext/Makefile.am b/src/glibext/Makefile.am
index 127f60c..af4f876 100644
--- a/src/glibext/Makefile.am
+++ b/src/glibext/Makefile.am
@@ -25,6 +25,7 @@ libglibext_la_SOURCES =					\
 	linegen-int.h						\
 	linegen.h linegen.c					\
 	linesegment.h linesegment.c			\
+	objhole.h							\
 	proto.h								\
 	seq.h seq.c							\
 	signal.h signal.c
diff --git a/src/glibext/objhole.h b/src/glibext/objhole.h
new file mode 100644
index 0000000..184e599
--- /dev/null
+++ b/src/glibext/objhole.h
@@ -0,0 +1,71 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * objhole.h - prototypes pour l'utilisation d'un espace inutilisé dans la structure GObject
+ *
+ * Copyright (C) 2019 Cyrille Bagard
+ *
+ *  This file is part of Chrysalide.
+ *
+ *  Chrysalide is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Chrysalide is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _GLIBEXT_OBJHOLE_H
+#define _GLIBEXT_OBJHOLE_H
+
+
+#include <glib-object.h>
+
+
+#include "../common/cpp.h"
+
+
+
+/**
+ * Une structure GObject a la définition suivante :
+ *
+ *    struct  _GObject
+ *    {
+ *        GTypeInstance  g_type_instance;
+ *        volatile guint ref_count;
+ *        GData          *qdata;
+ *    };
+ *
+ * L'espace entre les deux derniers champs est exploité ici.
+ */
+
+
+#define INIT_GOBJECT_EXTRA(obj)                                 \
+    do                                                          \
+    {                                                           \
+        guint *___space;                                        \
+        ___space = (((guint *)&obj->ref_count) + 1);            \
+        BUILD_BUG_ON((___space + 1) == (guint *)&obj->qdata);   \
+        *___space = 0;                                          \
+    }                                                           \
+    while (0)
+
+
+#define GET_GOBJECT_EXTRA(obj, tp)                              \
+    ({                                                          \
+        BUILD_BUG_ON(sizeof(tp) > sizeof(guint));               \
+        tp *___result;                                          \
+        ___result = (tp *)(((guint *)&obj->ref_count) + 1);     \
+        BUILD_BUG_ON((___result + 1) == (tp *)&obj->qdata);     \
+        ___result;                                              \
+    })
+
+
+
+#endif  /* _GLIBEXT_OBJHOLE_H */