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45e4762c | 1 | /* dlinfo -- Get information from the dynamic linker. |
04277e02 | 2 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
45e4762c RM |
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/>. */ |
45e4762c RM |
18 | |
19 | #include <dlfcn.h> | |
20 | #include <link.h> | |
21 | #include <ldsodefs.h> | |
22 | #include <libintl.h> | |
23 | ||
9b42a0b3 | 24 | #if !defined SHARED && IS_IN (libdl) |
5f21997b UD |
25 | |
26 | int | |
27 | dlinfo (void *handle, int request, void *arg) | |
28 | { | |
eb77a1fc | 29 | return __dlinfo (handle, request, arg); |
5f21997b UD |
30 | } |
31 | ||
32 | #else | |
33 | ||
11bf311e | 34 | # include <dl-tls.h> |
d78efd9f | 35 | |
45e4762c RM |
36 | struct dlinfo_args |
37 | { | |
45e4762c RM |
38 | void *handle; |
39 | int request; | |
40 | void *arg; | |
41 | }; | |
42 | ||
43 | static void | |
44 | dlinfo_doit (void *argsblock) | |
45 | { | |
46 | struct dlinfo_args *const args = argsblock; | |
47 | struct link_map *l = args->handle; | |
48 | ||
45e4762c RM |
49 | switch (args->request) |
50 | { | |
45e4762c RM |
51 | case RTLD_DI_CONFIGADDR: |
52 | default: | |
9e78f6f6 | 53 | _dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request")); |
45e4762c RM |
54 | break; |
55 | ||
c0f62c56 UD |
56 | case RTLD_DI_LMID: |
57 | *(Lmid_t *) args->arg = l->l_ns; | |
58 | break; | |
59 | ||
45e4762c RM |
60 | case RTLD_DI_LINKMAP: |
61 | *(struct link_map **) args->arg = l; | |
62 | break; | |
63 | ||
64 | case RTLD_DI_SERINFO: | |
65 | _dl_rtld_di_serinfo (l, args->arg, false); | |
66 | break; | |
67 | case RTLD_DI_SERINFOSIZE: | |
68 | _dl_rtld_di_serinfo (l, args->arg, true); | |
69 | break; | |
70 | ||
71 | case RTLD_DI_ORIGIN: | |
72 | strcpy (args->arg, l->l_origin); | |
73 | break; | |
d78efd9f RM |
74 | |
75 | case RTLD_DI_TLS_MODID: | |
76 | *(size_t *) args->arg = 0; | |
d78efd9f | 77 | *(size_t *) args->arg = l->l_tls_modid; |
d78efd9f RM |
78 | break; |
79 | ||
80 | case RTLD_DI_TLS_DATA: | |
81 | { | |
82 | void *data = NULL; | |
d78efd9f | 83 | if (l->l_tls_modid != 0) |
93025f93 | 84 | data = GLRO(dl_tls_get_addr_soft) (l); |
d78efd9f RM |
85 | *(void **) args->arg = data; |
86 | break; | |
87 | } | |
45e4762c RM |
88 | } |
89 | } | |
90 | ||
91 | int | |
eb77a1fc | 92 | __dlinfo (void *handle, int request, void *arg) |
45e4762c | 93 | { |
5f21997b | 94 | # ifdef SHARED |
8e1472d2 | 95 | if (!rtld_active ()) |
eb77a1fc | 96 | return _dlfcn_hook->dlinfo (handle, request, arg); |
5f21997b UD |
97 | # endif |
98 | ||
eb77a1fc | 99 | struct dlinfo_args args = { handle, request, arg }; |
45e4762c RM |
100 | return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0; |
101 | } | |
5f21997b UD |
102 | # ifdef SHARED |
103 | strong_alias (__dlinfo, dlinfo) | |
104 | # endif | |
105 | #endif |