Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 103 insertions, 0 deletions

diff --git a/REORG.TODO/dlfcn/dlopen.c b/REORG.TODO/dlfcn/dlopen.c
new file mode 100644
index 0000000000..22120655d2
--- /dev/null
+++ b/REORG.TODO/dlfcn/dlopen.c
@@ -0,0 +1,103 @@
+/* Load a shared object at run time.
+   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 <libintl.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <ldsodefs.h>
+
+#if !defined SHARED && IS_IN (libdl)
+
+void *
+dlopen (const char *file, int mode)
+{
+  return __dlopen (file, mode, RETURN_ADDRESS (0));
+}
+static_link_warning (dlopen)
+
+#else
+
+struct dlopen_args
+{
+  /* The arguments for dlopen_doit.  */
+  const char *file;
+  int mode;
+  /* The return value of dlopen_doit.  */
+  void *new;
+  /* Address of the caller.  */
+  const void *caller;
+};
+
+
+/* Non-shared code has no support for multiple namespaces.  */
+# ifdef SHARED
+#  define NS __LM_ID_CALLER
+# else
+#  define NS LM_ID_BASE
+# endif
+
+
+static void
+dlopen_doit (void *a)
+{
+  struct dlopen_args *args = (struct dlopen_args *) a;
+
+  if (args->mode & ~(RTLD_BINDING_MASK | RTLD_NOLOAD | RTLD_DEEPBIND
+		     | RTLD_GLOBAL | RTLD_LOCAL | RTLD_NODELETE
+		     | __RTLD_SPROF))
+    _dl_signal_error (0, NULL, NULL, _("invalid mode parameter"));
+
+  args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN,
+			     args->caller,
+			     args->file == NULL ? LM_ID_BASE : NS,
+			     __dlfcn_argc, __dlfcn_argv, __environ);
+}
+
+
+void *
+__dlopen (const char *file, int mode DL_CALLER_DECL)
+{
+# ifdef SHARED
+  if (__glibc_unlikely (_dlfcn_hook != NULL))
+    return _dlfcn_hook->dlopen (file, mode, DL_CALLER);
+# endif
+
+  struct dlopen_args args;
+  args.file = file;
+  args.mode = mode;
+  args.caller = DL_CALLER;
+
+# ifdef SHARED
+  return _dlerror_run (dlopen_doit, &args) ? NULL : args.new;
+# else
+  if (_dlerror_run (dlopen_doit, &args))
+    return NULL;
+
+  __libc_register_dl_open_hook ((struct link_map *) args.new);
+  __libc_register_dlfcn_hook ((struct link_map *) args.new);
+
+  return args.new;
+# endif
+}
+# ifdef SHARED
+#  include <shlib-compat.h>
+strong_alias (__dlopen, __dlopen_check)
+versioned_symbol (libdl, __dlopen_check, dlopen, GLIBC_2_1);
+# endif
+#endif