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Commit | Line | Data |
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c84142e8 | 1 | /* Load a shared object at run time. |
6d7e8eda | 2 | Copyright (C) 1995-2023 Free Software Foundation, Inc. |
afd4eb37 | 3 | This file is part of the GNU C Library. |
d66e34cd | 4 | |
afd4eb37 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
d66e34cd | 9 | |
afd4eb37 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
d66e34cd | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
d66e34cd | 18 | |
d66e34cd | 19 | #include <dlfcn.h> |
3e539cb4 | 20 | #include <libintl.h> |
b2b28911 | 21 | #include <stddef.h> |
9dcafc55 UD |
22 | #include <unistd.h> |
23 | #include <ldsodefs.h> | |
0c1c3a77 | 24 | #include <shlib-compat.h> |
5f21997b | 25 | |
993b3242 | 26 | struct dlopen_args |
d66e34cd | 27 | { |
993b3242 UD |
28 | /* The arguments for dlopen_doit. */ |
29 | const char *file; | |
30 | int mode; | |
31 | /* The return value of dlopen_doit. */ | |
94e365c6 | 32 | void *new; |
dc5efe83 UD |
33 | /* Address of the caller. */ |
34 | const void *caller; | |
993b3242 UD |
35 | }; |
36 | ||
c0f62c56 UD |
37 | |
38 | /* Non-shared code has no support for multiple namespaces. */ | |
0c1c3a77 FW |
39 | #ifdef SHARED |
40 | # define NS __LM_ID_CALLER | |
41 | #else | |
42 | # define NS LM_ID_BASE | |
43 | #endif | |
c0f62c56 UD |
44 | |
45 | ||
993b3242 UD |
46 | static void |
47 | dlopen_doit (void *a) | |
48 | { | |
49 | struct dlopen_args *args = (struct dlopen_args *) a; | |
50 | ||
3e539cb4 | 51 | if (args->mode & ~(RTLD_BINDING_MASK | RTLD_NOLOAD | RTLD_DEEPBIND |
0a26fc4d UD |
52 | | RTLD_GLOBAL | RTLD_LOCAL | RTLD_NODELETE |
53 | | __RTLD_SPROF)) | |
9e78f6f6 | 54 | _dl_signal_error (0, NULL, NULL, _("invalid mode parameter")); |
3e539cb4 | 55 | |
9dcafc55 UD |
56 | args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN, |
57 | args->caller, | |
58 | args->file == NULL ? LM_ID_BASE : NS, | |
0c1c3a77 | 59 | __libc_argc, __libc_argv, __environ); |
993b3242 UD |
60 | } |
61 | ||
62 | ||
0c1c3a77 FW |
63 | static void * |
64 | dlopen_implementation (const char *file, int mode, void *dl_caller) | |
993b3242 UD |
65 | { |
66 | struct dlopen_args args; | |
67 | args.file = file; | |
68 | args.mode = mode; | |
0c1c3a77 | 69 | args.caller = dl_caller; |
d66e34cd | 70 | |
993b3242 | 71 | return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; |
0c1c3a77 | 72 | } |
5f21997b | 73 | |
0c1c3a77 FW |
74 | #ifdef SHARED |
75 | void * | |
76 | ___dlopen (const char *file, int mode) | |
77 | { | |
8dcb6d0a | 78 | if (GLRO (dl_dlfcn_hook) != NULL) |
466c1ea1 | 79 | return GLRO (dl_dlfcn_hook)->dlopen (file, mode, RETURN_ADDRESS (0)); |
0c1c3a77 FW |
80 | else |
81 | return dlopen_implementation (file, mode, RETURN_ADDRESS (0)); | |
82 | } | |
83 | versioned_symbol (libc, ___dlopen, dlopen, GLIBC_2_34); | |
5f21997b | 84 | |
0c1c3a77 FW |
85 | # if OTHER_SHLIB_COMPAT (libdl, GLIBC_2_1, GLIBC_2_34) |
86 | compat_symbol (libdl, ___dlopen, dlopen, GLIBC_2_1); | |
5f21997b | 87 | # endif |
0c1c3a77 FW |
88 | #else /* !SHARED */ |
89 | /* Also used with _dlfcn_hook. */ | |
90 | void * | |
91 | __dlopen (const char *file, int mode, void *dl_caller) | |
92 | { | |
ed0185e4 | 93 | return dlopen_implementation (file, mode, dl_caller); |
d66e34cd | 94 | } |
0c1c3a77 FW |
95 | |
96 | void * | |
97 | ___dlopen (const char *file, int mode) | |
98 | { | |
466c1ea1 | 99 | return __dlopen (file, mode, RETURN_ADDRESS (0)); |
0c1c3a77 FW |
100 | } |
101 | weak_alias (___dlopen, dlopen) | |
102 | static_link_warning (dlopen) | |
103 | #endif /* !SHARED */ |