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48ab1c2f | 1 | /* Get loaded objects program headers. |
bed12f78 | 2 | Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
48ab1c2f UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2001. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
cc7375ce RM |
7 | modify it under the terms of the GNU Lesser General Public License as |
8 | published by the Free Software Foundation; either version 2.1 of the | |
48ab1c2f UD |
9 | License, or (at your option) any later version. |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
cc7375ce | 14 | Lesser General Public License for more details. |
48ab1c2f | 15 | |
cc7375ce | 16 | You should have received a copy of the GNU Lesser General Public |
48ab1c2f UD |
17 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <ldsodefs.h> | |
23 | #include <stddef.h> | |
24 | #include <bits/libc-lock.h> | |
25 | ||
e07bb02a UD |
26 | static void |
27 | cancel_handler (void *arg __attribute__((unused))) | |
28 | { | |
29 | __rtld_lock_unlock_recursive (GL(dl_load_lock)); | |
30 | } | |
31 | ||
27d640be | 32 | hidden_proto (__dl_iterate_phdr) |
48ab1c2f UD |
33 | int |
34 | __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, | |
35 | size_t size, void *data), void *data) | |
36 | { | |
37 | struct link_map *l; | |
38 | struct dl_phdr_info info; | |
39 | int ret = 0; | |
40 | ||
41 | /* Make sure we are alone. */ | |
d3c9f895 | 42 | __rtld_lock_lock_recursive (GL(dl_load_lock)); |
e07bb02a | 43 | __libc_cleanup_push (cancel_handler, 0); |
48ab1c2f | 44 | |
c0f62c56 UD |
45 | /* We have to determine the namespace of the caller since this determines |
46 | which namespace is reported. */ | |
47 | const void *caller = RETURN_ADDRESS (0); | |
48 | size_t nloaded = GL(dl_ns)[0]._ns_nloaded; | |
49 | Lmid_t ns = 0; | |
50 | for (Lmid_t cnt = DL_NNS - 1; cnt > 0; --cnt) | |
51 | for (struct link_map *l = GL(dl_ns)[cnt]._ns_loaded; l; l = l->l_next) | |
52 | { | |
53 | /* We have to count the total number of loaded objects. */ | |
54 | nloaded += GL(dl_ns)[cnt]._ns_nloaded; | |
55 | ||
56 | if (caller >= (const void *) l->l_map_start | |
57 | && caller < (const void *) 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 | ns = cnt; | |
61 | } | |
62 | ||
63 | for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next) | |
48ab1c2f | 64 | { |
48ab1c2f UD |
65 | info.dlpi_addr = l->l_addr; |
66 | info.dlpi_name = l->l_name; | |
67 | info.dlpi_phdr = l->l_phdr; | |
68 | info.dlpi_phnum = l->l_phnum; | |
bed12f78 | 69 | info.dlpi_adds = GL(dl_load_adds); |
c0f62c56 | 70 | info.dlpi_subs = GL(dl_load_adds) - nloaded; |
48ab1c2f UD |
71 | ret = callback (&info, sizeof (struct dl_phdr_info), data); |
72 | if (ret) | |
73 | break; | |
74 | } | |
75 | ||
76 | /* Release the lock. */ | |
e07bb02a | 77 | __libc_cleanup_pop (0); |
d3c9f895 | 78 | __rtld_lock_unlock_recursive (GL(dl_load_lock)); |
48ab1c2f UD |
79 | |
80 | return ret; | |
81 | } | |
27d640be | 82 | hidden_def (__dl_iterate_phdr) |
48ab1c2f UD |
83 | |
84 | #ifdef SHARED | |
27d640be | 85 | |
48ab1c2f | 86 | weak_alias (__dl_iterate_phdr, dl_iterate_phdr); |
27d640be RM |
87 | |
88 | #else | |
89 | ||
90 | /* dl-support.c defines these and initializes them early on. */ | |
91 | extern ElfW(Phdr) *_dl_phdr; | |
92 | extern size_t _dl_phnum; | |
93 | ||
94 | int | |
95 | dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, | |
96 | size_t size, void *data), void *data) | |
97 | { | |
98 | if (_dl_phnum != 0) | |
99 | { | |
100 | /* This entry describes this statically-linked program itself. */ | |
101 | struct dl_phdr_info info; | |
102 | int ret; | |
103 | info.dlpi_addr = 0; | |
104 | info.dlpi_name = ""; | |
105 | info.dlpi_phdr = _dl_phdr; | |
106 | info.dlpi_phnum = _dl_phnum; | |
bed12f78 | 107 | info.dlpi_adds = GL(dl_load_adds); |
c0f62c56 | 108 | info.dlpi_subs = GL(dl_load_adds) - GL(dl_ns)[LM_ID_BASE]._ns_nloaded; |
27d640be RM |
109 | ret = (*callback) (&info, sizeof (struct dl_phdr_info), data); |
110 | if (ret) | |
111 | return ret; | |
112 | } | |
113 | ||
114 | return __dl_iterate_phdr (callback, data); | |
115 | } | |
116 | ||
117 | ||
48ab1c2f | 118 | #endif |