mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/* Load a shared object at run time.
|
|
Copyright (C) 1995-2022 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <libintl.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <ldsodefs.h>
|
|
#include <shlib-compat.h>
|
|
|
|
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))
|
|
_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,
|
|
__libc_argc, __libc_argv, __environ);
|
|
}
|
|
|
|
|
|
static void *
|
|
dlopen_implementation (const char *file, int mode, void *dl_caller)
|
|
{
|
|
struct dlopen_args args;
|
|
args.file = file;
|
|
args.mode = mode;
|
|
args.caller = dl_caller;
|
|
|
|
return _dlerror_run (dlopen_doit, &args) ? NULL : args.new;
|
|
}
|
|
|
|
#ifdef SHARED
|
|
void *
|
|
___dlopen (const char *file, int mode)
|
|
{
|
|
if (GLRO (dl_dlfcn_hook) != NULL)
|
|
return GLRO (dl_dlfcn_hook)->dlopen (file, mode, RETURN_ADDRESS (0));
|
|
else
|
|
return dlopen_implementation (file, mode, RETURN_ADDRESS (0));
|
|
}
|
|
versioned_symbol (libc, ___dlopen, dlopen, GLIBC_2_34);
|
|
|
|
# if OTHER_SHLIB_COMPAT (libdl, GLIBC_2_1, GLIBC_2_34)
|
|
compat_symbol (libdl, ___dlopen, dlopen, GLIBC_2_1);
|
|
# endif
|
|
#else /* !SHARED */
|
|
/* Also used with _dlfcn_hook. */
|
|
void *
|
|
__dlopen (const char *file, int mode, void *dl_caller)
|
|
{
|
|
return dlopen_implementation (file, mode, dl_caller);
|
|
}
|
|
|
|
void *
|
|
___dlopen (const char *file, int mode)
|
|
{
|
|
return __dlopen (file, mode, RETURN_ADDRESS (0));
|
|
}
|
|
weak_alias (___dlopen, dlopen)
|
|
static_link_warning (dlopen)
|
|
#endif /* !SHARED */
|