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, 23 insertions, 0 deletions

diff --git a/testsuites/libtests/dl09/dl09.doc b/testsuites/libtests/dl09/dl09.doc
new file mode 100644
index 0000000000..4c5d97ef2a
--- /dev/null
+++ b/testsuites/libtests/dl09/dl09.doc
@@ -0,0 +1,23 @@
+# Copyright (c) 2019 Chris Johns <chrisj@rtems.org>
+#
+# 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.
+#
+
+This file describes the directives and concepts tested by this test set.
+
+test set name: dl09
+
+directives:
+
+  dlopen
+  dlinfo
+  dlsym
+  dlclose
+
+concepts:
+
++ Load modules with a space between then so short address range relative
+  instructions require trampolines.
++ Repeat 100 times.