glibc/dlfcn/dlsym.c
Ulrich Drepper e6574c9ca2 Update.
2000-07-18 Kaz Kylheku <kaz@ashi.footprints.net>

	* spinlock.c (__pthread_alt_lock, __pthread_alt_timedlock): Fixed
	bug whereby thr field of waitnode structure would not be correctly
	set unless a null self pointer is passed to the functions.
	Eliminated redundant calls to thread_self().
2000-07-18 17:18:38 +00:00

53 lines
1.5 KiB
C

/* Look up a symbol in a shared object loaded by `dlopen'.
Copyright (C) 1995, 96, 97, 98, 99, 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <dlfcn.h>
#include <stddef.h>
struct dlsym_args
{
/* The arguments to dlsym_doit. */
void *handle;
const char *name;
void *who;
/* The return value of dlsym_doit. */
void *sym;
};
static void
dlsym_doit (void *a)
{
struct dlsym_args *args = (struct dlsym_args *) a;
args->sym = _dl_sym (args->handle, args->name, args->who);
}
void *
dlsym (void *handle, const char *name)
{
struct dlsym_args args;
args.who = RETURN_ADDRESS (0);
args.handle = handle;
args.name = name;
return (_dlerror_run (dlsym_doit, &args) ? NULL : args.sym);
}