2 * Support for dynamic linking code in static libc.
3 * Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 * Partially based on GNU C Library (file: libc/elf/dl-support.c)
7 * Copyright (C) 2008 STMicroelectronics Ltd.
8 * Author: Carmelo Amoroso <carmelo.amoroso@st.com>
10 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
16 #if defined(USE_TLS) && USE_TLS
23 #if defined(USE_TLS) && USE_TLS
25 void (*_dl_init_static_tls) (struct link_map *) = &_dl_nothread_init_static_tls;
32 void internal_function _dl_aux_init (ElfW(auxv_t) *av);
33 void internal_function _dl_aux_init (ElfW(auxv_t) *av)
35 /* Get the program headers base address from the aux vect */
36 _dl_phdr = (ElfW(Phdr) *) av[AT_PHDR].a_un.a_val;
38 /* Get the number of program headers from the aux vect */
39 _dl_phnum = (size_t) av[AT_PHNUM].a_un.a_val;
42 #if defined(USE_TLS) && USE_TLS
43 /* Initialize static TLS area and DTV for current (only) thread.
44 libpthread implementations should provide their own hook
45 to handle all threads. */
48 _dl_nothread_init_static_tls (struct link_map *map)
50 # if defined(TLS_TCB_AT_TP)
51 void *dest = (char *) THREAD_SELF - map->l_tls_offset;
52 # elif defined(TLS_DTV_AT_TP)
53 void *dest = (char *) THREAD_SELF + map->l_tls_offset + TLS_PRE_TCB_SIZE;
55 # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
58 /* Fill in the DTV slot so that a later LD/GD access will find it. */
59 dtv_t *dtv = THREAD_DTV ();
60 assert (map->l_tls_modid <= dtv[-1].counter);
61 dtv[map->l_tls_modid].pointer.val = dest;
62 dtv[map->l_tls_modid].pointer.is_static = true;
64 /* Initialize the memory. */
65 memset (mempcpy (dest, map->l_tls_initimage, map->l_tls_initimage_size),
66 '\0', map->l_tls_blocksize - map->l_tls_initimage_size);