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