1 /* $NetBSD: aarch64.c,v 1.2 2022/06/07 08:08:31 ryo Exp $ */
2
3 /*-
4 * Copyright (c) 2022 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Ryo Shimizu.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __RCSID("$NetBSD: aarch64.c,v 1.2 2022/06/07 08:08:31 ryo Exp $");
35 #endif /* not lint */
36
37 #include <kvm.h>
38 #include <nlist.h>
39 #include <err.h>
40 #include <stdlib.h>
41
42 #include "extern.h"
43
44 vaddr_t el0_trap;
45 vaddr_t el1_trap;
46 vaddr_t cpu_switchto_softint;
47
48 static struct nlist nl[] = {
49 { .n_name = "el0_trap" }, /* 0 */
50 { .n_name = "el1_trap" }, /* 1 */
51 { .n_name = "cpu_switchto_softint" }, /* 2 */
52 { .n_name = NULL },
53 };
54
55 void
db_mach_init(kvm_t * kd)56 db_mach_init(kvm_t *kd)
57 {
58 if (kvm_nlist(kd, nl) == -1)
59 errx(EXIT_FAILURE, "kvm_nlist: %s", kvm_geterr(kd));
60
61 el0_trap = nl[0].n_value;
62 el1_trap = nl[1].n_value;
63 cpu_switchto_softint = nl[2].n_value;
64 }
65