Add initcall in ddekit.

1 files changed, 42 insertions, 0 deletions

diff --git a/libddekit/include/ddekit/initcall.h b/libddekit/include/ddekit/initcall.h
new file mode 100644
index 00000000..b503cc6a
--- /dev/null
+++ b/libddekit/include/ddekit/initcall.h
@@ -0,0 +1,42 @@
+#ifndef _ddekit_initcall_h
+#define _ddekit_initcall_h
+
+// from l4/sys/compiler.h
+#if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ >= 4
+#define L4_STICKY(x)    __attribute__((used)) x
+#else
+#define L4_STICKY(x)    __attribute__((unused)) x
+#endif
+
+#define l4str(s) #s
+
+// from dde_linux/ARCH-x86/ctor.h
+typedef void (*l4ddekit_initcall_t)(void);
+
+#define __l4ddekit_initcall(p) \
+	__attribute__ ((__section__ (".l4dde_ctors." #p)))
+
+/** Define a function to be a DDEKit initcall. 
+ *
+ *  Define a function to be a DDEKit initcall. This function will then be placed
+ *  in a separate linker section of the binary (called .l4dde_ctors). The L4Env
+ *  construction mechanism will execute all constructors in this section during
+ *  application startup.
+ *
+ *  This is the right place to place Linux' module_init functions & Co.
+ *
+ *  \param fn    function
+ */
+#define DDEKIT_INITCALL(fn)	DDEKIT_CTOR(fn, 1)
+
+#define DDEKIT_CTOR(fn, prio) \
+	static l4ddekit_initcall_t \
+	L4_STICKY(__l4ddekit_initcall_##fn) \
+	__l4ddekit_initcall(prio) = (void *)fn
+
+/**
+ * Runs all registered initcalls.
+ */
+void ddekit_do_initcalls(void);
+
+#endif