1 /* $NetBSD: alpha.c,v 1.1 2023/11/22 02:01:07 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2023 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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: alpha.c,v 1.1 2023/11/22 02:01:07 thorpej 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 <ddb/ddb.h>
43
44 #include <machine/frame.h>
45 #include <machine/pcb.h>
46 #include <alpha/db_machdep.h>
47
48 #include "extern.h"
49
50 struct pcb pcb;
51 struct trapframe ddb_regs;
52
53 extern db_alpha_nlist db_alpha_nl[];
54
55 void
db_mach_init(kvm_t * kd)56 db_mach_init(kvm_t *kd)
57 {
58
59 if (kvm_nlist(kd, db_alpha_nl) == -1) {
60 errx(EXIT_FAILURE, "kvm_nlist: %s", kvm_geterr(kd));
61 }
62 if ((size_t)kvm_read(kd, db_alpha_nl[SYM_dumppcb].n_value,
63 &pcb, sizeof(pcb)) != sizeof(pcb)) {
64 warnx("cannot read dumppcb: %s", kvm_geterr(kd));
65 }
66
67 memcpy(&ddb_regs.tf_regs[FRAME_S0],
68 &pcb.pcb_context[0], 7 * sizeof(unsigned long));
69 ddb_regs.tf_regs[FRAME_RA] = pcb.pcb_context[7];
70 ddb_regs.tf_regs[FRAME_SP] = pcb.pcb_hw.apcb_ksp;
71 ddb_regp = &ddb_regs;
72 }
73