1 /* Get loaded objects program headers.
2 Copyright (C) 2001-2013 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
18 not, see <http://www.gnu.org/licenses/>. */
23 #include <bits/libc-lock.h>
26 cancel_handler (void *arg
__attribute__((unused
)))
28 __rtld_lock_unlock_recursive (GL(dl_load_write_lock
));
31 hidden_proto (__dl_iterate_phdr
)
33 __dl_iterate_phdr (int (*callback
) (struct dl_phdr_info
*info
,
34 size_t size
, void *data
), void *data
)
37 struct dl_phdr_info info
;
40 /* Make sure nobody modifies the list of loaded objects. */
41 __rtld_lock_lock_recursive (GL(dl_load_write_lock
));
42 __libc_cleanup_push (cancel_handler
, NULL
);
44 /* We have to determine the namespace of the caller since this determines
45 which namespace is reported. */
46 size_t nloaded
= GL(dl_ns
)[0]._ns_nloaded
;
49 const void *caller
= RETURN_ADDRESS (0);
50 for (Lmid_t cnt
= GL(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
59 || _dl_addr_inside_object (l
, (ElfW(Addr
)) caller
)))
64 for (l
= GL(dl_ns
)[ns
]._ns_loaded
; l
!= NULL
; l
= l
->l_next
)
66 info
.dlpi_addr
= l
->l_real
->l_addr
;
67 info
.dlpi_name
= l
->l_real
->l_name
;
68 info
.dlpi_phdr
= l
->l_real
->l_phdr
;
69 info
.dlpi_phnum
= l
->l_real
->l_phnum
;
70 info
.dlpi_adds
= GL(dl_load_adds
);
71 info
.dlpi_subs
= GL(dl_load_adds
) - nloaded
;
72 info
.dlpi_tls_data
= NULL
;
73 info
.dlpi_tls_modid
= l
->l_real
->l_tls_modid
;
74 if (info
.dlpi_tls_modid
!= 0)
75 info
.dlpi_tls_data
= GLRO(dl_tls_get_addr_soft
) (l
->l_real
);
76 ret
= callback (&info
, sizeof (struct dl_phdr_info
), data
);
81 /* Release the lock. */
82 __libc_cleanup_pop (0);
83 __rtld_lock_unlock_recursive (GL(dl_load_write_lock
));
87 hidden_def (__dl_iterate_phdr
)
91 weak_alias (__dl_iterate_phdr
, dl_iterate_phdr
);
96 dl_iterate_phdr (int (*callback
) (struct dl_phdr_info
*info
,
97 size_t size
, void *data
), void *data
)
101 /* This entry describes this statically-linked program itself. */
102 struct dl_phdr_info info
;
106 info
.dlpi_phdr
= _dl_phdr
;
107 info
.dlpi_phnum
= _dl_phnum
;
108 info
.dlpi_adds
= GL(dl_load_adds
);
109 info
.dlpi_subs
= GL(dl_load_adds
) - GL(dl_ns
)[LM_ID_BASE
]._ns_nloaded
;
110 ret
= (*callback
) (&info
, sizeof (struct dl_phdr_info
), data
);
115 return __dl_iterate_phdr (callback
, data
);