80 lines
2.2 KiB
C
80 lines
2.2 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 <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 OTHER_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,
|
||
|
|
__libc_argc, __libc_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 (GLRO (dl_dlfcn_hook) != NULL)
|
||
|
|
return GLRO (dl_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
|