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glibc/dlfcn/dlmopen.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 <errno.h> | |
#include <libintl.h> | |
#include <stddef.h> | |
#include <unistd.h> | |
#include <ldsodefs.h> | |
#if !defined SHARED && IS_IN (libdl) | |
void * | |
dlmopen (Lmid_t nsid, const char *file, int mode) | |
{ | |
return __dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); | |
} | |
static_link_warning (dlmopen) | |
#else | |
struct dlmopen_args | |
{ | |
/* Namespace ID. */ | |
Lmid_t nsid; | |
/* 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; | |
}; | |
static void | |
dlmopen_doit (void *a) | |
{ | |
struct dlmopen_args *args = (struct dlmopen_args *) a; | |
/* Non-shared code has no support for multiple namespaces. */ | |
if (args->nsid != LM_ID_BASE) | |
{ | |
# ifdef SHARED | |
/* If trying to open the link map for the main executable the namespace | |
must be the main one. */ | |
if (args->file == NULL) | |
# endif | |
GLRO(dl_signal_error) (EINVAL, NULL, NULL, N_("invalid namespace")); | |
/* It makes no sense to use RTLD_GLOBAL when loading a DSO into | |
a namespace other than the base namespace. */ | |
if (__glibc_unlikely (args->mode & RTLD_GLOBAL)) | |
GLRO(dl_signal_error) (EINVAL, NULL, NULL, N_("invalid mode")); | |
} | |
args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN, | |
args->caller, | |
args->nsid, __dlfcn_argc, __dlfcn_argv, | |
__environ); | |
} | |
void * | |
__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL) | |
{ | |
# ifdef SHARED | |
if (__glibc_unlikely (_dlfcn_hook != NULL)) | |
return _dlfcn_hook->dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); | |
# endif | |
struct dlmopen_args args; | |
args.nsid = nsid; | |
args.file = file; | |
args.mode = mode; | |
args.caller = DL_CALLER; | |
# ifdef SHARED | |
return _dlerror_run (dlmopen_doit, &args) ? NULL : args.new; | |
# else | |
if (_dlerror_run (dlmopen_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 | |
strong_alias (__dlmopen, dlmopen) | |
# endif | |
#endif |