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mips.c revision 1.2 
      1  1.2  mrg /*	$NetBSD: mips.c,v 1.2 2021/12/11 19:24:22 mrg Exp $	*/
      2  1.1  mrg 
      3  1.1  mrg /*
      4  1.1  mrg  * Copyright (c) 2020 Matthew R. Green
      5  1.1  mrg  * All rights reserved.
      6  1.1  mrg  *
      7  1.1  mrg  * Redistribution and use in source and binary forms, with or without
      8  1.1  mrg  * modification, are permitted provided that the following conditions
      9  1.1  mrg  * are met:
     10  1.1  mrg  * 1. Redistributions of source code must retain the above copyright
     11  1.1  mrg  *    notice, this list of conditions and the following disclaimer.
     12  1.1  mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1  mrg  *    notice, this list of conditions and the following disclaimer in the
     14  1.1  mrg  *    documentation and/or other materials provided with the distribution.
     15  1.1  mrg  *
     16  1.1  mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.1  mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.1  mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.1  mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.1  mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  1.1  mrg  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  1.1  mrg  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  1.1  mrg  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  1.1  mrg  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1  mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1  mrg  * SUCH DAMAGE.
     27  1.1  mrg  */
     28  1.1  mrg 
     29  1.1  mrg #include <sys/cdefs.h>
     30  1.1  mrg #ifndef lint
     31  1.2  mrg __RCSID("$NetBSD: mips.c,v 1.2 2021/12/11 19:24:22 mrg Exp $");
     32  1.1  mrg #endif /* not lint */
     33  1.1  mrg 
     34  1.1  mrg #include <ddb/ddb.h>
     35  1.1  mrg 
     36  1.1  mrg #include <kvm.h>
     37  1.1  mrg #include <nlist.h>
     38  1.1  mrg #include <err.h>
     39  1.1  mrg #include <stdlib.h>
     40  1.1  mrg 
     41  1.1  mrg #include <machine/pcb.h>
     42  1.1  mrg 
     43  1.1  mrg #include "extern.h"
     44  1.1  mrg 
     45  1.1  mrg static struct nlist nl[] = {
     46  1.1  mrg 	{ .n_name = "dumppcb" },
     47  1.1  mrg 	{ .n_name = "cpu_switchto" },
     48  1.1  mrg 	{ .n_name = NULL },
     49  1.1  mrg };
     50  1.1  mrg 
     51  1.1  mrg struct pcb	pcb;
     52  1.1  mrg 
     53  1.1  mrg void
     54  1.1  mrg db_mach_init(kvm_t *kd)
     55  1.1  mrg {
     56  1.1  mrg 
     57  1.1  mrg 	if (kvm_nlist(kd, nl) == -1) {
     58  1.1  mrg 		errx(EXIT_FAILURE, "kvm_nlist: %s", kvm_geterr(kd));
     59  1.1  mrg 	}
     60  1.1  mrg 	if ((size_t)kvm_read(kd, nl[0].n_value, &pcb, sizeof(pcb)) !=
     61  1.1  mrg 	    sizeof(pcb)) {
     62  1.1  mrg 		warnx("cannot read dumppcb: %s", kvm_geterr(kd));
     63  1.1  mrg 	}
     64  1.1  mrg }
     65  1.1  mrg 
     66  1.1  mrg /* Provided for db_trace.c. */
     67  1.1  mrg vaddr_t
     68  1.1  mrg db_mach_addr_cpuswitch(void)
     69  1.1  mrg {
     70  1.1  mrg 	return (vaddr_t)nl[1].n_value;
     71  1.1  mrg }
     72