Add thread-local storage (TLS) support

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

1 files changed, 36 insertions, 0 deletions

diff --git a/cpukit/score/cpu/m68k/__m68k_read_tp.c b/cpukit/score/cpu/m68k/__m68k_read_tp.c
new file mode 100644
index 0000000000..3e024a84b3
--- /dev/null
+++ b/cpukit/score/cpu/m68k/__m68k_read_tp.c
@@ -0,0 +1,36 @@
+/*
+ * 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>
+
+void __m68k_read_tp(void);
+
+void __m68k_read_tp(void)
+{
+  const Thread_Control *executing = _Thread_Get_executing();
+  void *tp = (char *) executing->Start.tls_area +
+    _TLS_Get_thread_control_block_area_size((uintptr_t) _TLS_Alignment)
+    + 0x7000;
+
+  __asm__ volatile (
+    "move.l %0, %%a0"
+    :
+    : "d" (tp)
+  );
+}