xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Load a shared object at run time. |
| 2 | Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <dlfcn.h> |
| 20 | #include <stddef.h> |
| 21 | #include <unistd.h> |
| 22 | #include <ldsodefs.h> |
| 23 | |
| 24 | /* This file is for compatibility with glibc 2.0. Compile it only if |
| 25 | versioning is used. */ |
| 26 | #include <shlib-compat.h> |
| 27 | #if SHLIB_COMPAT (libdl, GLIBC_2_0, GLIBC_2_1) |
| 28 | |
| 29 | struct dlopen_args |
| 30 | { |
| 31 | /* The arguments for dlopen_doit. */ |
| 32 | const char *file; |
| 33 | int mode; |
| 34 | /* The return value of dlopen_doit. */ |
| 35 | void *new; |
| 36 | /* Address of the caller. */ |
| 37 | const void *caller; |
| 38 | }; |
| 39 | |
| 40 | |
| 41 | /* Non-shared code has no support for multiple namespaces. */ |
| 42 | #ifdef SHARED |
| 43 | # define NS __LM_ID_CALLER |
| 44 | #else |
| 45 | # define NS LM_ID_BASE |
| 46 | #endif |
| 47 | |
| 48 | |
| 49 | static void |
| 50 | dlopen_doit (void *a) |
| 51 | { |
| 52 | struct dlopen_args *args = (struct dlopen_args *) a; |
| 53 | |
| 54 | args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN, |
| 55 | args->caller, |
| 56 | args->file == NULL ? LM_ID_BASE : NS, |
| 57 | __dlfcn_argc, __dlfcn_argv, __environ); |
| 58 | } |
| 59 | |
| 60 | extern void *__dlopen_nocheck (const char *file, int mode); |
| 61 | void * |
| 62 | __dlopen_nocheck (const char *file, int mode) |
| 63 | { |
| 64 | struct dlopen_args args; |
| 65 | args.file = file; |
| 66 | args.caller = RETURN_ADDRESS (0); |
| 67 | |
| 68 | if ((mode & RTLD_BINDING_MASK) == 0) |
| 69 | /* By default assume RTLD_LAZY. */ |
| 70 | mode |= RTLD_LAZY; |
| 71 | args.mode = mode; |
| 72 | |
| 73 | if (__glibc_unlikely (_dlfcn_hook != NULL)) |
| 74 | return _dlfcn_hook->dlopen (file, mode, RETURN_ADDRESS (0)); |
| 75 | |
| 76 | return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; |
| 77 | } |
| 78 | compat_symbol (libdl, __dlopen_nocheck, dlopen, GLIBC_2_0); |
| 79 | #endif |