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
50struct pcb	pcb;
51struct trapframe ddb_regs;
52
53extern db_alpha_nlist db_alpha_nl[];
54
55void
56db_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