72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* $NetBSD: mips.c,v 1.2 2021/12/11 19:24:22 mrg Exp $ */
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/*
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* Copyright (c) 2020 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: mips.c,v 1.2 2021/12/11 19:24:22 mrg Exp $");
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#endif /* not lint */
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#include <ddb/ddb.h>
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#include <kvm.h>
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#include <nlist.h>
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#include <err.h>
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#include <stdlib.h>
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#include <machine/pcb.h>
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#include "extern.h"
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static struct nlist nl[] = {
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{ .n_name = "dumppcb" },
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{ .n_name = "cpu_switchto" },
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{ .n_name = NULL },
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};
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struct pcb pcb;
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void
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db_mach_init(kvm_t *kd)
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{
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if (kvm_nlist(kd, nl) == -1) {
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errx(EXIT_FAILURE, "kvm_nlist: %s", kvm_geterr(kd));
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}
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if ((size_t)kvm_read(kd, nl[0].n_value, &pcb, sizeof(pcb)) !=
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sizeof(pcb)) {
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warnx("cannot read dumppcb: %s", kvm_geterr(kd));
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}
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}
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/* Provided for db_trace.c. */
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vaddr_t
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db_mach_addr_cpuswitch(void)
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{
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return (vaddr_t)nl[1].n_value;
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}
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