1/*-
2 * Copyright (c) 2018 The FreeBSD Foundation
3 *
4 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
5 * under sponsorship from the FreeBSD Foundation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <machine/specialreg.h>
27#include <machine/cpufunc.h>
28
29static uint32_t cpu_feature, cpu_feature2;
30static uint32_t cpu_stdext_feature, cpu_stdext_feature2;
31
32static void
33init_cpu_features(void)
34{
35	u_int p[4];
36
37	do_cpuid(1, p);
38	cpu_feature = p[3];
39	cpu_feature2 = p[2];
40	do_cpuid(0, p);
41	if (p[0] >= 7) {
42		cpuid_count(7, 0, p);
43		cpu_stdext_feature = p[1];
44		cpu_stdext_feature2 = p[2];
45	} else {
46		cpu_stdext_feature = 0;
47		cpu_stdext_feature2 = 0;
48	}
49}
50
51static void
52crt1_handle_rela(const Elf_Rela *r)
53{
54	Elf_Addr *ptr, *where, target;
55
56	switch (ELF_R_TYPE(r->r_info)) {
57	case R_X86_64_IRELATIVE:
58		ptr = (Elf_Addr *)r->r_addend;
59		where = (Elf_Addr *)r->r_offset;
60		target = ((Elf_Addr (*)(uint32_t, uint32_t, uint32_t,
61		    uint32_t))ptr)(cpu_feature, cpu_feature2,
62		    cpu_stdext_feature, cpu_stdext_feature2);
63		*where = target;
64		break;
65	}
66}
67