1 /* Look up a symbol in a shared object loaded by `dlopen'.
2 Copyright (C) 1995-2000, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 /* The arguments to dlsym_doit. */
32 /* The return value of dlsym_doit. */
39 struct dlsym_args *args = (struct dlsym_args *) a;
41 args->sym = _dl_sym (args->handle, args->name, args->who);
46 dlsym (void *handle, const char *name)
48 struct dlsym_args args;
49 args.who = RETURN_ADDRESS (0);
53 /* Protect against concurrent loads and unloads. */
54 __rtld_lock_lock_recursive (GL(dl_load_lock));
56 void *result = (_dlerror_run (dlsym_doit, &args) ? NULL : args.sym);
58 __rtld_lock_unlock_recursive (GL(dl_load_lock));