1 files changed, 129 insertions, 0 deletions
diff --git a/cpukit/include/rtems/linkersets.h b/cpukit/include/rtems/linkersets.h
new file mode 100644
index 0000000000..bad046999c
--- /dev/null
+++ b/cpukit/include/rtems/linkersets.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015, 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_LINKERSET_H
+#define _RTEMS_LINKERSET_H
+
+#include <rtems/score/basedefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define RTEMS_LINKER_SET_BEGIN( set ) \
+  _Linker_set_##set##_begin
+
+#define RTEMS_LINKER_SET_END( set ) \
+  _Linker_set_##set##_end
+
+#define RTEMS_LINKER_ROSET_DECLARE( set, type ) \
+  extern type const RTEMS_LINKER_SET_BEGIN( set )[0]; \
+  extern type const RTEMS_LINKER_SET_END( set )[0]
+
+#define RTEMS_LINKER_ROSET( set, type ) \
+  type const RTEMS_LINKER_SET_BEGIN( set )[0] \
+  RTEMS_SECTION( ".rtemsroset." #set ".begin" ) RTEMS_USED; \
+  type const RTEMS_LINKER_SET_END( set )[0] \
+  RTEMS_SECTION( ".rtemsroset." #set ".end" ) RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_ITEM_DECLARE( set, type, item ) \
+  extern type const _Linker_set_##set##_##item
+
+#define RTEMS_LINKER_ROSET_ITEM_REFERENCE( set, type, item ) \
+  static type const * const _Set_reference_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
+  &_Linker_set_##set##_##item
+
+#define RTEMS_LINKER_ROSET_ITEM_ORDERED( set, type, item, order ) \
+  type const _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset." #set ".content.0." RTEMS_XSTRING( order ) ) \
+  RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_ITEM( set, type, item ) \
+  type const _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset." #set ".content.1" ) RTEMS_USED
+
+#define RTEMS_LINKER_ROSET_CONTENT( set, decl ) \
+  decl \
+  RTEMS_SECTION( ".rtemsroset." #set ".content" )
+
+#define RTEMS_LINKER_RWSET_DECLARE( set, type ) \
+  extern type RTEMS_LINKER_SET_BEGIN( set )[0]; \
+  extern type RTEMS_LINKER_SET_END( set )[0]
+
+#define RTEMS_LINKER_RWSET( set, type ) \
+  type RTEMS_LINKER_SET_BEGIN( set )[0] \
+  RTEMS_SECTION( ".rtemsrwset." #set ".begin" ) RTEMS_USED; \
+  type RTEMS_LINKER_SET_END( set )[0] \
+  RTEMS_SECTION( ".rtemsrwset." #set ".end" ) RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_ITEM_DECLARE( set, type, item ) \
+  extern type _Linker_set_##set##_##item
+
+/*
+ * The .rtemsroset is here not a typo.  We must ensure that the references are
+ * not a victim of the garbage collection of the linker.  Thus, we place them
+ * in a dedicated area of the RTEMS read-only linker set section.
+ */
+#define RTEMS_LINKER_RWSET_ITEM_REFERENCE( set, type, item ) \
+  static type * const _Set_reference_##set##_##item \
+  RTEMS_SECTION( ".rtemsroset.reference" ) RTEMS_USED = \
+  &_Linker_set_##set##_##item
+
+#define RTEMS_LINKER_RWSET_ITEM_ORDERED( set, type, item, order ) \
+  type _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content.0." RTEMS_XSTRING( order ) ) \
+  RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_ITEM( set, type, item ) \
+  type _Linker_set_##set##_##item \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content.1" ) RTEMS_USED
+
+#define RTEMS_LINKER_RWSET_CONTENT( set, decl ) \
+  decl \
+  RTEMS_SECTION( ".rtemsrwset." #set ".content" )
+
+RTEMS_INLINE_ROUTINE uintptr_t _Linker_set_Obfuscate( const void *ptr )
+{
+  uintptr_t addr;
+
+  addr = (uintptr_t) ptr;
+  RTEMS_OBFUSCATE_VARIABLE( addr );
+
+  return addr;
+}
+
+#define RTEMS_LINKER_SET_SIZE( set ) \
+  ( _Linker_set_Obfuscate( RTEMS_LINKER_SET_END( set ) ) \
+    - _Linker_set_Obfuscate( RTEMS_LINKER_SET_BEGIN( set ) ) )
+
+#define RTEMS_LINKER_SET_ITEM_COUNT( set ) \
+  ( RTEMS_LINKER_SET_SIZE( set ) \
+    / sizeof( RTEMS_LINKER_SET_BEGIN( set )[ 0 ] ) )
+
+#define RTEMS_LINKER_SET_IS_EMPTY( set ) \
+  ( RTEMS_LINKER_SET_SIZE( set ) == 0 )
+
+#define RTEMS_LINKER_SET_FOREACH( set, item ) \
+  for ( \
+    item = (void *) _Linker_set_Obfuscate( RTEMS_LINKER_SET_BEGIN( set ) ) ; \
+    item != RTEMS_LINKER_SET_END( set ) ; \
+    ++item \
+  )
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_LINKERSET_H */