1 /*-
2 * Copyright (c) 2019 Leandro Lupori
3 * Copyright (c) 2021 The FreeBSD Foundation
4 *
5 * Portions of this software were developed by Andrew Turner
6 * under sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28
29 static void
ifunc_init(const Elf_Auxinfo * aux __unused)30 ifunc_init(const Elf_Auxinfo *aux __unused)
31 {
32 }
33
34 static void
crt1_handle_rela(const Elf_Rela * r)35 crt1_handle_rela(const Elf_Rela *r)
36 {
37 typedef Elf_Addr (*ifunc_resolver_t)(
38 uint64_t, uint64_t, uint64_t, uint64_t,
39 uint64_t, uint64_t, uint64_t, uint64_t);
40 Elf_Addr *ptr, *where, target;
41
42 switch (ELF_R_TYPE(r->r_info)) {
43 case R_AARCH64_IRELATIVE:
44 ptr = (Elf_Addr *)r->r_addend;
45 where = (Elf_Addr *)r->r_offset;
46 target = ((ifunc_resolver_t)ptr)(0, 0, 0, 0, 0, 0, 0, 0);
47 *where = target;
48 break;
49 }
50 }
51