[BZ #15022] Correct global-scope dlopen issues in static executables.

This change creates a link map in static executables to serve as the
global search list for dlopen.  It fixes a problem with the inability
to access the global symbol object and a crash on an attempt to map a
DSO into the global scope.  Some code that has become dead after the
addition of this link map is removed too and test cases are provided.

1 files changed, 31 insertions, 0 deletions

diff --git a/dlfcn/modstatic3.c b/dlfcn/modstatic3.c
new file mode 100644
index 0000000000..cd24986f23
--- /dev/null
+++ b/dlfcn/modstatic3.c
@@ -0,0 +1,31 @@
+/* DSO used for dlopen testing with a static executable.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+unsigned int foo;
+
+unsigned int
+getfoo (void)
+{
+  return foo;
+}
+
+void
+setfoo (unsigned int f)
+{
+  foo = f;
+}