elf/dl-symbol.c

   1 /* Look up a symbol's run-time value in the scope of a loaded object.
   2    Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <stddef.h>
  21 #include <elf/ldsodefs.h>
  22
  23 /* Look up symbol NAME in MAP's scope and return its run-time address.  */
  24
  25 ElfW(Addr)
  26 internal_function
  27 _dl_symbol_value (struct link_map *map, const char *name)
  28 {
  29   ElfW(Addr) loadbase;
  30   const ElfW(Sym) *ref = NULL;
  31   struct link_map *scope[2] = { map, NULL };
  32   loadbase = _dl_lookup_symbol (name, &ref, scope, map->l_name, 0);
  33   return loadbase + ref->st_value;
  34 }