/* Load a shared object at run time.

   Copyright (C) 1995-2018 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <dlfcn.h>

#include <stddef.h>

#include <unistd.h>

#include <ldsodefs.h>

/* This file is for compatibility with glibc 2.0.  Compile it only if

   versioning is used.  */

#include <shlib-compat.h>

#if SHLIB_COMPAT (libdl, GLIBC_2_0, GLIBC_2_1)

struct dlopen_args

{

  /* The arguments for dlopen_doit.  */

  const char *file;

  int mode;

  /* The return value of dlopen_doit.  */

  void *new;

  /* Address of the caller.  */

  const void *caller;

};

/* Non-shared code has no support for multiple namespaces.  */

#ifdef SHARED

# define NS __LM_ID_CALLER

#else

# define NS LM_ID_BASE

#endif

static void

dlopen_doit (void *a)

{

  struct dlopen_args *args = (struct dlopen_args *) a;

  args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN,

			     args->caller,

			     args->file == NULL ? LM_ID_BASE : NS,

			     __dlfcn_argc, __dlfcn_argv, __environ);

}

extern void *__dlopen_nocheck (const char *file, int mode);

void *

__dlopen_nocheck (const char *file, int mode)

{

  struct dlopen_args args;

  args.file = file;

  args.caller = RETURN_ADDRESS (0);

  if ((mode & RTLD_BINDING_MASK) == 0)

    /* By default assume RTLD_LAZY.  */

    mode |= RTLD_LAZY;

  args.mode = mode;

  if (!rtld_active ())

    return _dlfcn_hook->dlopen (file, mode, RETURN_ADDRESS (0));

  return _dlerror_run (dlopen_doit, &args) ? NULL : args.new;

}

compat_symbol (libdl, __dlopen_nocheck, dlopen, GLIBC_2_0);

#endif