dlfcn/dlopenold.c

   1 /* Load a shared object at run time.
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999 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 <dlfcn.h>
  21
  22 /* This file is for compatibility with glibc 2.0.  Compile it only if
  23    versioning is used.  */
  24 #if defined PIC && DO_VERSIONING
  25
  26 struct dlopen_args
  27 {
  28   /* The arguments for dlopen_doit.  */
  29   const char *file;
  30   int mode;
  31   /* The return value of dlopen_doit.  */
  32   void *new;
  33   /* Address of the caller.  */
  34   const void *caller;
  35 };
  36
  37
  38 static void
  39 dlopen_doit (void *a)
  40 {
  41   struct dlopen_args *args = (struct dlopen_args *) a;
  42
  43   args->new = _dl_open (args->file ?: "", args->mode, args->caller);
  44 }
  45
  46 void *
  47 __dlopen_nocheck (const char *file, int mode)
  48 {
  49   struct dlopen_args args;
  50   args.file = file;
  51   args.caller = __builtin_return_address (0);
  52
  53   if ((mode & RTLD_BINDING_MASK) == 0)
  54     /* By default assume RTLD_LAZY.  */
  55     mode |= RTLD_LAZY;
  56   args.mode = mode;
  57
  58   return _dlerror_run (dlopen_doit, &args) ? NULL : args.new;
  59 }
  60 symbol_version (__dlopen_nocheck, dlopen, GLIBC_2.0);
  61 #endif