1/* dlinfo -- Get information from the dynamic linker.
2 Copyright (C) 2003-2021 Free Software Foundation, Inc.
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
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <dlfcn.h>
20#include <link.h>
21#include <ldsodefs.h>
22#include <libintl.h>
23
24#if !defined SHARED && IS_IN (libdl)
25
26int
27dlinfo (void *handle, int request, void *arg)
28{
29 return __dlinfo (handle, request, arg);
30}
31
32#else
33
34# include <dl-tls.h>
35
36struct dlinfo_args
37{
38 void *handle;
39 int request;
40 void *arg;
41};
42
43static void
44dlinfo_doit (void *argsblock)
45{
46 struct dlinfo_args *const args = argsblock;
47 struct link_map *l = args->handle;
48
49 switch (args->request)
50 {
51 case RTLD_DI_CONFIGADDR:
52 default:
53 _dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request"));
54 break;
55
56 case RTLD_DI_LMID:
57 *(Lmid_t *) args->arg = l->l_ns;
58 break;
59
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;
74
75 case RTLD_DI_TLS_MODID:
76 *(size_t *) args->arg = 0;
77 *(size_t *) args->arg = l->l_tls_modid;
78 break;
79
80 case RTLD_DI_TLS_DATA:
81 {
82 void *data = NULL;
83 if (l->l_tls_modid != 0)
84 data = GLRO(dl_tls_get_addr_soft) (l);
85 *(void **) args->arg = data;
86 break;
87 }
88 }
89}
90
91int
92__dlinfo (void *handle, int request, void *arg)
93{
94# ifdef SHARED
95 if (!rtld_active ())
96 return _dlfcn_hook->dlinfo (handle, request, arg);
97# endif
98
99 struct dlinfo_args args = { handle, request, arg };
100 return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0;
101}
102# ifdef SHARED
103strong_alias (__dlinfo, dlinfo)
104# endif
105#endif
106