Update.
[glibc.git] / dlfcn / dlinfo.c
blob44af55a3039101ebdcf7e203aff660be3618e170
1 /* dlinfo -- Get information from the dynamic linker.
2 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <dlfcn.h>
21 #include <link.h>
22 #include <ldsodefs.h>
23 #include <libintl.h>
25 #if !defined SHARED && defined IS_IN_libdl
27 int
28 dlinfo (void *handle, int request, void *arg)
30 return __dlinfo (handle, request, arg, RETURN_ADDRESS (0));
33 #else
35 struct dlinfo_args
37 ElfW(Addr) caller;
38 void *handle;
39 int request;
40 void *arg;
43 static void
44 dlinfo_doit (void *argsblock)
46 struct dlinfo_args *const args = argsblock;
47 struct link_map *l = args->handle;
49 # if 0
50 if (args->handle == RTLD_SELF)
52 Lmid_t nsid;
54 /* Find the highest-addressed object that CALLER is not below. */
55 for (nsid = 0; nsid < DL_NNS; ++nsid)
56 for (l = GL(dl_ns)[nsid]._ns_loaded; l != NULL; l = l->l_next)
57 if (caller >= l->l_map_start && caller < l->l_map_end)
58 /* There must be exactly one DSO for the range of the virtual
59 memory. Otherwise something is really broken. */
60 break;
62 if (l == NULL)
63 GLRO(dl_signal_error) (0, NULL, NULL, N_("\
64 RTLD_SELF used in code not dynamically loaded"));
66 # endif
68 switch (args->request)
70 case RTLD_DI_CONFIGADDR:
71 default:
72 GLRO(dl_signal_error) (0, NULL, NULL, N_("unsupported dlinfo request"));
73 break;
75 case RTLD_DI_LMID:
76 *(Lmid_t *) args->arg = l->l_ns;
77 break;
79 case RTLD_DI_LINKMAP:
80 *(struct link_map **) args->arg = l;
81 break;
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;
90 case RTLD_DI_ORIGIN:
91 strcpy (args->arg, l->l_origin);
92 break;
96 int
97 __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL)
99 # ifdef SHARED
100 if (__builtin_expect (_dlfcn_hook != NULL, 0))
101 return _dlfcn_hook->dlinfo (handle, request, arg,
102 DL_CALLER);
103 # endif
105 struct dlinfo_args args = { (ElfW(Addr)) DL_CALLER,
106 handle, request, arg };
107 return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0;
109 # ifdef SHARED
110 strong_alias (__dlinfo, dlinfo)
111 # endif
112 #endif