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glibc/dlfcn/dlopen.c
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/* Load a shared object at run time. | |
Copyright (C) 1995-2016 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 <libintl.h> | |
#include <stddef.h> | |
#include <unistd.h> | |
#include <ldsodefs.h> | |
#if !defined SHARED && IS_IN (libdl) | |
void * | |
dlopen (const char *file, int mode) | |
{ | |
return __dlopen (file, mode, RETURN_ADDRESS (0)); | |
} | |
static_link_warning (dlopen) | |
#else | |
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; | |
if (args->mode & ~(RTLD_BINDING_MASK | RTLD_NOLOAD | RTLD_DEEPBIND | |
| RTLD_GLOBAL | RTLD_LOCAL | RTLD_NODELETE | |
| __RTLD_SPROF)) | |
GLRO(dl_signal_error) (0, NULL, NULL, _("invalid mode parameter")); | |
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); | |
} | |
void * | |
__dlopen (const char *file, int mode DL_CALLER_DECL) | |
{ | |
# ifdef SHARED | |
if (__glibc_unlikely (_dlfcn_hook != NULL)) | |
return _dlfcn_hook->dlopen (file, mode, DL_CALLER); | |
# endif | |
struct dlopen_args args; | |
args.file = file; | |
args.mode = mode; | |
args.caller = DL_CALLER; | |
# ifdef SHARED | |
return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; | |
# else | |
if (_dlerror_run (dlopen_doit, &args)) | |
return NULL; | |
__libc_register_dl_open_hook ((struct link_map *) args.new); | |
__libc_register_dlfcn_hook ((struct link_map *) args.new); | |
return args.new; | |
# endif | |
} | |
# ifdef SHARED | |
# include <shlib-compat.h> | |
strong_alias (__dlopen, __dlopen_check) | |
versioned_symbol (libdl, __dlopen_check, dlopen, GLIBC_2_1); | |
# endif | |
#endif |