* sysdeps/unix/sysv/linux/dl-sysdep.h: Use __ASSEMBLER__ instead
[glibc.git] / elf / dl-iteratephdr.c
blobc49671583b6b5a5b62836ced2afa4c445fe3e4cb
1 /* Get loaded objects program headers.
2 Copyright (C) 2001-2004,2006,2007,2008 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
6 The GNU C Library is free software; you can redistribute it and/or
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
9 License, or (at your option) any later version.
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
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
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. */
21 #include <errno.h>
22 #include <ldsodefs.h>
23 #include <stddef.h>
24 #include <bits/libc-lock.h>
26 static void
27 cancel_handler (void *arg __attribute__((unused)))
29 __rtld_lock_unlock_recursive (GL(dl_load_lock));
32 hidden_proto (__dl_iterate_phdr)
33 int
34 __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
35 size_t size, void *data), void *data)
37 struct link_map *l;
38 struct dl_phdr_info info;
39 int ret = 0;
41 /* Make sure we are alone. */
42 __rtld_lock_lock_recursive (GL(dl_load_lock));
43 __libc_cleanup_push (cancel_handler, 0);
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)
53 /* We have to count the total number of loaded objects. */
54 nloaded += GL(dl_ns)[cnt]._ns_nloaded;
56 if (caller >= (const void *) l->l_map_start
57 && caller < (const void *) l->l_map_end
58 && (l->l_contiguous
59 || _dl_addr_inside_object (l, (ElfW(Addr)) caller)))
60 ns = cnt;
63 for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
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;
69 info.dlpi_adds = GL(dl_load_adds);
70 info.dlpi_subs = GL(dl_load_adds) - nloaded;
71 info.dlpi_tls_modid = 0;
72 info.dlpi_tls_data = NULL;
73 info.dlpi_tls_modid = l->l_tls_modid;
74 if (info.dlpi_tls_modid != 0)
75 info.dlpi_tls_data = GLRO(dl_tls_get_addr_soft) (l);
76 ret = callback (&info, sizeof (struct dl_phdr_info), data);
77 if (ret)
78 break;
81 /* Release the lock. */
82 __libc_cleanup_pop (0);
83 __rtld_lock_unlock_recursive (GL(dl_load_lock));
85 return ret;
87 hidden_def (__dl_iterate_phdr)
89 #ifdef SHARED
91 weak_alias (__dl_iterate_phdr, dl_iterate_phdr);
93 #else
95 /* dl-support.c defines these and initializes them early on. */
96 extern ElfW(Phdr) *_dl_phdr;
97 extern size_t _dl_phnum;
99 int
100 dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
101 size_t size, void *data), void *data)
103 if (_dl_phnum != 0)
105 /* This entry describes this statically-linked program itself. */
106 struct dl_phdr_info info;
107 int ret;
108 info.dlpi_addr = 0;
109 info.dlpi_name = "";
110 info.dlpi_phdr = _dl_phdr;
111 info.dlpi_phnum = _dl_phnum;
112 info.dlpi_adds = GL(dl_load_adds);
113 info.dlpi_subs = GL(dl_load_adds) - GL(dl_ns)[LM_ID_BASE]._ns_nloaded;
114 ret = (*callback) (&info, sizeof (struct dl_phdr_info), data);
115 if (ret)
116 return ret;
119 return __dl_iterate_phdr (callback, data);
123 #endif