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45e4762c | 1 | /* dlinfo -- Get information from the dynamic linker. |
d4697bc9 | 2 | Copyright (C) 2003-2014 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 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
45e4762c RM |
18 | |
19 | #include <dlfcn.h> | |
20 | #include <link.h> | |
21 | #include <ldsodefs.h> | |
22 | #include <libintl.h> | |
23 | ||
5f21997b UD |
24 | #if !defined SHARED && defined IS_IN_libdl |
25 | ||
26 | int | |
27 | dlinfo (void *handle, int request, void *arg) | |
28 | { | |
29 | return __dlinfo (handle, request, arg, RETURN_ADDRESS (0)); | |
30 | } | |
31 | ||
32 | #else | |
33 | ||
11bf311e | 34 | # include <dl-tls.h> |
d78efd9f | 35 | |
45e4762c RM |
36 | struct dlinfo_args |
37 | { | |
38 | ElfW(Addr) caller; | |
39 | void *handle; | |
40 | int request; | |
41 | void *arg; | |
42 | }; | |
43 | ||
44 | static void | |
45 | dlinfo_doit (void *argsblock) | |
46 | { | |
47 | struct dlinfo_args *const args = argsblock; | |
48 | struct link_map *l = args->handle; | |
49 | ||
5f21997b | 50 | # if 0 |
45e4762c RM |
51 | if (args->handle == RTLD_SELF) |
52 | { | |
5ca3d19c | 53 | Lmid_t nsid; |
45e4762c RM |
54 | |
55 | /* Find the highest-addressed object that CALLER is not below. */ | |
5ca3d19c UD |
56 | for (nsid = 0; nsid < DL_NNS; ++nsid) |
57 | for (l = GL(dl_ns)[nsid]._ns_loaded; l != NULL; l = l->l_next) | |
9be09e06 UD |
58 | if (caller >= l->l_map_start && caller < l->l_map_end |
59 | && (l->l_contiguous || _dl_addr_inside_object (l, caller))) | |
5ca3d19c | 60 | break; |
45e4762c RM |
61 | |
62 | if (l == NULL) | |
154d10bd | 63 | GLRO(dl_signal_error) (0, NULL, NULL, N_("\ |
45e4762c RM |
64 | RTLD_SELF used in code not dynamically loaded")); |
65 | } | |
5f21997b | 66 | # endif |
45e4762c RM |
67 | |
68 | switch (args->request) | |
69 | { | |
45e4762c RM |
70 | case RTLD_DI_CONFIGADDR: |
71 | default: | |
154d10bd | 72 | GLRO(dl_signal_error) (0, NULL, NULL, N_("unsupported dlinfo request")); |
45e4762c RM |
73 | break; |
74 | ||
c0f62c56 UD |
75 | case RTLD_DI_LMID: |
76 | *(Lmid_t *) args->arg = l->l_ns; | |
77 | break; | |
78 | ||
45e4762c RM |
79 | case RTLD_DI_LINKMAP: |
80 | *(struct link_map **) args->arg = l; | |
81 | break; | |
82 | ||
83 | case RTLD_DI_SERINFO: | |
84 | _dl_rtld_di_serinfo (l, args->arg, false); | |
85 | break; | |
86 | case RTLD_DI_SERINFOSIZE: | |
87 | _dl_rtld_di_serinfo (l, args->arg, true); | |
88 | break; | |
89 | ||
90 | case RTLD_DI_ORIGIN: | |
91 | strcpy (args->arg, l->l_origin); | |
92 | break; | |
d78efd9f RM |
93 | |
94 | case RTLD_DI_TLS_MODID: | |
95 | *(size_t *) args->arg = 0; | |
d78efd9f | 96 | *(size_t *) args->arg = l->l_tls_modid; |
d78efd9f RM |
97 | break; |
98 | ||
99 | case RTLD_DI_TLS_DATA: | |
100 | { | |
101 | void *data = NULL; | |
d78efd9f | 102 | if (l->l_tls_modid != 0) |
93025f93 | 103 | data = GLRO(dl_tls_get_addr_soft) (l); |
d78efd9f RM |
104 | *(void **) args->arg = data; |
105 | break; | |
106 | } | |
45e4762c RM |
107 | } |
108 | } | |
109 | ||
110 | int | |
5f21997b | 111 | __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL) |
45e4762c | 112 | { |
5f21997b | 113 | # ifdef SHARED |
a1ffb40e | 114 | if (__glibc_unlikely (_dlfcn_hook != NULL)) |
5f21997b UD |
115 | return _dlfcn_hook->dlinfo (handle, request, arg, |
116 | DL_CALLER); | |
117 | # endif | |
118 | ||
119 | struct dlinfo_args args = { (ElfW(Addr)) DL_CALLER, | |
45e4762c RM |
120 | handle, request, arg }; |
121 | return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0; | |
122 | } | |
5f21997b UD |
123 | # ifdef SHARED |
124 | strong_alias (__dlinfo, dlinfo) | |
125 | # endif | |
126 | #endif |