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/* Load a shared object at run time.
Copyright (C) 1995-2017 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 (__glibc_unlikely (_dlfcn_hook != NULL))
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
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