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c0f62c56 | 1 | /* Load a shared object at run time. |
04277e02 | 2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
c0f62c56 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 | |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
c0f62c56 UD |
18 | |
19 | #include <dlfcn.h> | |
20 | #include <errno.h> | |
21 | #include <libintl.h> | |
22 | #include <stddef.h> | |
9dcafc55 | 23 | #include <unistd.h> |
c0f62c56 UD |
24 | #include <ldsodefs.h> |
25 | ||
9b42a0b3 | 26 | #if !defined SHARED && IS_IN (libdl) |
5f21997b UD |
27 | |
28 | void * | |
29 | dlmopen (Lmid_t nsid, const char *file, int mode) | |
30 | { | |
31 | return __dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); | |
32 | } | |
33 | static_link_warning (dlmopen) | |
34 | ||
35 | #else | |
36 | ||
c0f62c56 UD |
37 | struct dlmopen_args |
38 | { | |
39 | /* Namespace ID. */ | |
40 | Lmid_t nsid; | |
41 | /* The arguments for dlopen_doit. */ | |
42 | const char *file; | |
43 | int mode; | |
44 | /* The return value of dlopen_doit. */ | |
45 | void *new; | |
46 | /* Address of the caller. */ | |
47 | const void *caller; | |
48 | }; | |
49 | ||
50 | static void | |
51 | dlmopen_doit (void *a) | |
52 | { | |
53 | struct dlmopen_args *args = (struct dlmopen_args *) a; | |
54 | ||
55 | /* Non-shared code has no support for multiple namespaces. */ | |
56 | if (args->nsid != LM_ID_BASE) | |
3a975ff5 | 57 | { |
5f21997b | 58 | # ifdef SHARED |
3a975ff5 UD |
59 | /* If trying to open the link map for the main executable the namespace |
60 | must be the main one. */ | |
61 | if (args->file == NULL) | |
5f21997b | 62 | # endif |
9e78f6f6 | 63 | _dl_signal_error (EINVAL, NULL, NULL, N_("invalid namespace")); |
3a975ff5 UD |
64 | |
65 | /* It makes no sense to use RTLD_GLOBAL when loading a DSO into | |
66 | a namespace other than the base namespace. */ | |
a1ffb40e | 67 | if (__glibc_unlikely (args->mode & RTLD_GLOBAL)) |
9e78f6f6 | 68 | _dl_signal_error (EINVAL, NULL, NULL, N_("invalid mode")); |
3a975ff5 | 69 | } |
a334319f | 70 | |
9dcafc55 UD |
71 | args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN, |
72 | args->caller, | |
73 | args->nsid, __dlfcn_argc, __dlfcn_argv, | |
74 | __environ); | |
c0f62c56 UD |
75 | } |
76 | ||
77 | ||
78 | void * | |
5f21997b | 79 | __dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL) |
c0f62c56 | 80 | { |
5f21997b | 81 | # ifdef SHARED |
8e1472d2 | 82 | if (!rtld_active ()) |
5f21997b UD |
83 | return _dlfcn_hook->dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); |
84 | # endif | |
85 | ||
c0f62c56 UD |
86 | struct dlmopen_args args; |
87 | args.nsid = nsid; | |
88 | args.file = file; | |
89 | args.mode = mode; | |
5f21997b | 90 | args.caller = DL_CALLER; |
c0f62c56 | 91 | |
5f21997b | 92 | # ifdef SHARED |
c0f62c56 | 93 | return _dlerror_run (dlmopen_doit, &args) ? NULL : args.new; |
5f21997b UD |
94 | # else |
95 | if (_dlerror_run (dlmopen_doit, &args)) | |
96 | return NULL; | |
97 | ||
98 | __libc_register_dl_open_hook ((struct link_map *) args.new); | |
99 | __libc_register_dlfcn_hook ((struct link_map *) args.new); | |
100 | ||
101 | return args.new; | |
102 | # endif | |
c0f62c56 | 103 | } |
5f21997b UD |
104 | # ifdef SHARED |
105 | strong_alias (__dlmopen, dlmopen) | |
106 | # endif | |
107 | #endif |