blob: ae77f5261a4917e44d4b999c51afd0c250413d95 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* Support for dynamic linking code in static libc.
* Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
*
* Partially based on GNU C Library (file: libc/elf/dl-support.c)
*
* Copyright (C) 2008 STMicroelectronics Ltd.
* Author: Carmelo Amoroso <carmelo.amoroso@st.com>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*
*/
#include <link.h>
#include <elf.h>
#if defined(USE_TLS) && USE_TLS
#include <assert.h>
#include <tls.h>
#include <ldsodefs.h>
#include <string.h>
#endif
#if defined(USE_TLS) && USE_TLS
void (*_dl_init_static_tls) (struct link_map *) = &_dl_nothread_init_static_tls;
#endif
ElfW(Phdr) *_dl_phdr;
size_t _dl_phnum;
size_t _dl_pagesize;
void internal_function _dl_aux_init (ElfW(auxv_t) *av);
void internal_function _dl_aux_init (ElfW(auxv_t) *av)
{
/* Get the program headers base address from the aux vect */
_dl_phdr = (ElfW(Phdr) *) av[AT_PHDR].a_un.a_val;
/* Get the number of program headers from the aux vect */
_dl_phnum = (size_t) av[AT_PHNUM].a_un.a_val;
/* Get the pagesize from the aux vect */
_dl_pagesize = (av[AT_PAGESZ].a_un.a_val) ? (size_t) av[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
}
#if defined(USE_TLS) && USE_TLS
/* Initialize static TLS area and DTV for current (only) thread.
libpthread implementations should provide their own hook
to handle all threads. */
void
attribute_hidden
_dl_nothread_init_static_tls (struct link_map *map)
{
# if defined(TLS_TCB_AT_TP)
void *dest = (char *) THREAD_SELF - map->l_tls_offset;
# elif defined(TLS_DTV_AT_TP)
void *dest = (char *) THREAD_SELF + map->l_tls_offset + TLS_PRE_TCB_SIZE;
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/* Fill in the DTV slot so that a later LD/GD access will find it. */
dtv_t *dtv = THREAD_DTV ();
assert (map->l_tls_modid <= dtv[-1].counter);
dtv[map->l_tls_modid].pointer.val = dest;
dtv[map->l_tls_modid].pointer.is_static = true;
/* Initialize the memory. */
memset (mempcpy (dest, map->l_tls_initimage, map->l_tls_initimage_size),
'\0', map->l_tls_blocksize - map->l_tls_initimage_size);
}
#endif
|
