1 files changed, 83 insertions, 0 deletions
diff --git a/REORG.TODO/dlfcn/dlvsym.c b/REORG.TODO/dlfcn/dlvsym.c
new file mode 100644
index 0000000000..5ed220b77c
--- /dev/null
+++ b/REORG.TODO/dlfcn/dlvsym.c
@@ -0,0 +1,83 @@
+/* Look up a versioned symbol in a shared object loaded by `dlopen'.
+   Copyright (C) 1995-2017 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/>.  */
+
+#include <dlfcn.h>
+#include <stddef.h>
+
+#include <ldsodefs.h>
+
+#if !defined SHARED && IS_IN (libdl)
+
+void *
+weak_function
+dlvsym (void *handle, const char *name, const char *version_str)
+{
+  return __dlvsym (handle, name, version_str, RETURN_ADDRESS (0));
+}
+
+#else
+
+struct dlvsym_args
+{
+  /* The arguments to dlvsym_doit.  */
+  void *handle;
+  const char *name;
+  const char *version;
+  void *who;
+
+  /* The return values of dlvsym_doit.  */
+  void *sym;
+};
+
+
+static void
+dlvsym_doit (void *a)
+{
+  struct dlvsym_args *args = (struct dlvsym_args *)a;
+
+  args->sym = _dl_vsym (args->handle, args->name, args->version, args->who);
+}
+
+void *
+__dlvsym (void *handle, const char *name, const char *version_str
+	  DL_CALLER_DECL)
+{
+# ifdef SHARED
+  if (__glibc_unlikely (_dlfcn_hook != NULL))
+    return _dlfcn_hook->dlvsym (handle, name, version_str, DL_CALLER);
+# endif
+
+  struct dlvsym_args args;
+  args.handle = handle;
+  args.name = name;
+  args.who = DL_CALLER;
+  args.version = version_str;
+
+  /* Protect against concurrent loads and unloads.  */
+  __rtld_lock_lock_recursive (GL(dl_load_lock));
+
+  void *result = (_dlerror_run (dlvsym_doit, &args) ? NULL : args.sym);
+
+  __rtld_lock_unlock_recursive (GL(dl_load_lock));
+
+  return result;
+}
+# ifdef SHARED
+weak_alias (__dlvsym, dlvsym)
+# endif
+#endif