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e254df14 | 1 | /* Load a shared object at run time. |
b168057a | 2 | Copyright (C) 1995-2015 Free Software Foundation, Inc. |
e254df14 UD |
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 | |
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. | |
e254df14 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
e254df14 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
e254df14 | 18 | |
e254df14 | 19 | #include <dlfcn.h> |
150ae521 | 20 | #include <stddef.h> |
9dcafc55 UD |
21 | #include <unistd.h> |
22 | #include <ldsodefs.h> | |
e254df14 | 23 | |
e57931a8 UD |
24 | /* This file is for compatibility with glibc 2.0. Compile it only if |
25 | versioning is used. */ | |
16710d58 RM |
26 | #include <shlib-compat.h> |
27 | #if SHLIB_COMPAT (libdl, GLIBC_2_0, GLIBC_2_1) | |
e57931a8 | 28 | |
e254df14 UD |
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. */ | |
94e365c6 | 35 | void *new; |
dc5efe83 UD |
36 | /* Address of the caller. */ |
37 | const void *caller; | |
e254df14 UD |
38 | }; |
39 | ||
40 | ||
c0f62c56 UD |
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 | ||
e254df14 UD |
49 | static void |
50 | dlopen_doit (void *a) | |
51 | { | |
52 | struct dlopen_args *args = (struct dlopen_args *) a; | |
53 | ||
9dcafc55 UD |
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); | |
e254df14 UD |
58 | } |
59 | ||
20bb2883 | 60 | extern void *__dlopen_nocheck (const char *file, int mode); |
e254df14 UD |
61 | void * |
62 | __dlopen_nocheck (const char *file, int mode) | |
63 | { | |
64 | struct dlopen_args args; | |
65 | args.file = file; | |
e6574c9c | 66 | args.caller = RETURN_ADDRESS (0); |
e254df14 UD |
67 | |
68 | if ((mode & RTLD_BINDING_MASK) == 0) | |
69 | /* By default assume RTLD_LAZY. */ | |
70 | mode |= RTLD_LAZY; | |
71 | args.mode = mode; | |
72 | ||
a1ffb40e | 73 | if (__glibc_unlikely (_dlfcn_hook != NULL)) |
5f21997b UD |
74 | return _dlfcn_hook->dlopen (file, mode, RETURN_ADDRESS (0)); |
75 | ||
e254df14 UD |
76 | return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; |
77 | } | |
16710d58 | 78 | compat_symbol (libdl, __dlopen_nocheck, dlopen, GLIBC_2_0); |
e254df14 | 79 | #endif |