Add thread-local storage (TLS) support

Tested and implemented on ARM, m68k, PowerPC and SPARC.  Other
architectures need more work.

1 files changed, 35 insertions, 0 deletions

diff --git a/cpukit/score/cpu/arm/__tls_get_addr.c b/cpukit/score/cpu/arm/__tls_get_addr.c
new file mode 100644
index 0000000000..cd046518e1
--- /dev/null
+++ b/cpukit/score/cpu/arm/__tls_get_addr.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  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.com/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/score/thread.h>
+#include <rtems/score/tls.h>
+
+#include <assert.h>
+
+void *__tls_get_addr(const TLS_Index *ti);
+
+void *__tls_get_addr(const TLS_Index *ti)
+{
+  const Thread_Control *executing = _Thread_Get_executing();
+  void *tls_block = (char *) executing->Start.tls_area
+    + _TLS_Get_thread_control_block_area_size( (uintptr_t) _TLS_Alignment );
+
+  assert(ti->module == 1);
+
+  return (char *) tls_block + ti->offset;
+}