1/* Invoke the early initialization function in libc.so.
2 Copyright (C) 2020-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <assert.h>
20#include <ldsodefs.h>
21#include <libc-early-init.h>
22#include <link.h>
23#include <stddef.h>
24
25void
26_dl_call_libc_early_init (struct link_map *libc_map, _Bool initial)
27{
28 /* There is nothing to do if we did not actually load libc.so. */
29 if (libc_map == NULL)
30 return;
31
32 const ElfW(Sym) *sym
33 = _dl_lookup_direct (libc_map, "__libc_early_init",
34 0x069682ac, /* dl_new_hash output. */
35 "GLIBC_PRIVATE",
36 0x0963cf85); /* _dl_elf_hash output. */
37 assert (sym != NULL);
38 __typeof (__libc_early_init) *early_init
39 = DL_SYMBOL_ADDRESS (libc_map, sym);
40 early_init (initial);
41}
42