47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* dlsym -- Look up a symbol in a shared object loaded by `dlopen'.
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Copyright (C) 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <stddef.h>
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#include <link.h>
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#include <dlfcn.h>
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#include <setjmp.h>
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void *
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dlsym (void *handle, const char *name)
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{
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struct link_map *map = handle;
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struct link_map *real_next;
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Elf32_Addr value;
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int lose;
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void doit (void)
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{
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const Elf32_Sym *ref = NULL;
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value = _dl_lookup_symbol (name, &ref, map, map->l_name);
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}
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/* Confine the symbol scope to just this map. */
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real_next = map->l_next;
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map->l_next = NULL;
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lose = _dlerror_run (doit);
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map->l_next = real_next;
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return lose ? NULL : (void *) value;
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}
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