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 30 ifunc_init(const Elf_Auxinfo *aux __unused) 31 { 32 } 33 34 static void 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