[Minios-devel] [UNIKRAFT PATCH v3 5/7] include/essentials: Provide __constructor macro

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

Provide a constructor attribure macro for marking a
function symbol as constructor. The linker/compiler
is going to populate a function pointer of it to
the init_array section of the binary.

Signed-off-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>
---
 include/uk/essentials.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/uk/essentials.h b/include/uk/essentials.h
index f6cc6ea..3d1b705 100644
--- a/include/uk/essentials.h
+++ b/include/uk/essentials.h
@@ -73,6 +73,19 @@ extern "C" {
 #ifndef __align
 #define __align(bytes)         __attribute__((aligned(bytes)))
 #endif
+
+/**
+ * Mark a function as constructor
+ * The compiler/linker will populate a function pointer
+ * (sorted by priority) to the init_array section
+ *
+ * @param lvl
+ *   Priority level (101 (earliest)...onwards (latest))
+ */
+#ifndef __constructor
+#define __constructor(lvl) __attribute__ ((constructor (lvl)))
+#endif
+
 #else
 /* TO BE DEFINED */
 #endif /* __GNUC__ */
-- 
2.7.4


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