libdl: Add support for trampolines

- Trampolines or fixups for veneers provide long jump support
  for instruciton sets that implement short relative address
  branches. The linker provides trampolines when creating a
  static image. This patch adds trampoline support to libdl
  and the ARM architecture.

- The dl09 test requires enough memory so modules are outside
  the relative branch instruction ranges for the architecture.

Updates #3685

1 files changed, 30 insertions, 0 deletions

diff --git a/testsuites/libtests/dl09/dl-o5.h b/testsuites/libtests/dl09/dl-o5.h
new file mode 100644
index 0000000000..bb4ce468a2
--- /dev/null
+++ b/testsuites/libtests/dl09/dl-o5.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018 Chris Johns <chrisj@rtems.org>.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+
+#if !defined(DL05_H)
+#define DL05_H
+
+/*
+ * A set of variables in dl-o5 referenced by dl-03 and unresolved when dl-o3 is
+ * loaded. They are all uninitialised variables with various sizes in a mixed
+ * order to get various alignments. These and dl-o4 variables are designed to
+ * force the dependent tables to grow.
+ */
+
+extern uint64_t dl05_unresolv_1;
+extern uint16_t dl05_unresolv_2;
+extern uint32_t dl05_unresolv_3;
+extern uint8_t  dl05_unresolv_4;
+extern int64_t  dl05_unresolv_5;
+
+int rtems_main_o5 (void);
+
+#endif