2 * Copyright (c) 2018 The FreeBSD Foundation
4 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
5 * under sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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
26 #include <machine/specialreg.h>
27 #include <machine/cpufunc.h>
29 static uint32_t cpu_feature, cpu_feature2;
30 static uint32_t cpu_stdext_feature, cpu_stdext_feature2;
33 init_cpu_features(void)
35 u_int cpuid_supported, p[4];
41 " xorl $0x200000,%%eax\n"
52 : "=r" (cpuid_supported) : : "eax", "ecx", "cc");
53 if (cpuid_supported) {
60 cpu_stdext_feature = p[1];
61 cpu_stdext_feature2 = p[2];
63 cpu_stdext_feature = 0;
64 cpu_stdext_feature2 = 0;
69 cpu_stdext_feature = 0;
70 cpu_stdext_feature2 = 0;
75 crt1_handle_rel(const Elf_Rel *r)
77 Elf_Addr *where, target;
79 switch (ELF_R_TYPE(r->r_info)) {
81 where = (Elf_Addr *)r->r_offset;
82 target = ((Elf_Addr (*)(uint32_t, uint32_t, uint32_t,
83 uint32_t))*where)(cpu_feature, cpu_feature2,
84 cpu_stdext_feature, cpu_stdext_feature2);