1/* $OpenBSD: db_machdep.h,v 1.6 2021/08/30 08:11:12 jasper Exp $*/
2/* $NetBSD: db_machdep.h,v 1.13 1996/04/29 20:50:08 leo Exp $ */
3
4/*
5 * Mach Operating System
6 * Copyright (c) 1992 Carnegie Mellon University
7 * All Rights Reserved.
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie Mellon
27 * the rights to redistribute these changes.
28 */
29
30/*
31 * Machine-dependent defines for new kernel debugger.
32 */
33#ifndef _MACHINE_DB_MACHDEP_H_
34#define _MACHINE_DB_MACHDEP_H_
35
36#include <sys/types.h>
37#include <uvm/uvm_param.h>
38#include <machine/psl.h>
39#include <machine/trap.h>
40
41typedef long db_expr_t; /* expression - signed */
42typedef struct trapframe db_regs_t;
43extern db_regs_t ddb_regs; /* register state */
44
45#define PC_REGS(regs) ((regs)->srr0)
46#define SET_PC_REGS(regs, value) PC_REGS(regs) = (value)
47
48#define BKPT_INST 0x7C810808 /* breakpoint instruction */
49
50#define BKPT_SIZE (4) /* size of breakpoint inst */
51#define BKPT_SET(inst) (BKPT_INST)
52
53#define db_clear_single_step(regs) ((regs)->srr1 &= ~PSL_SE)
54#define db_set_single_step(regs) ((regs)->srr1 |= PSL_SE)
55
56#define T_BREAKPOINT 0xffff
57#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
58#define IS_WATCHPOINT_TRAP(type, code) 0
59
60#define M_RTS 0xfc0007fe
61#define I_RTS 0x4c000020
62#define M_BC 0xfc000000
63#define I_BC 0x40000000
64#define M_B 0xfc000000
65#define I_B 0x50000000
66#define M_RFI 0xfc0007fe
67#define I_RFI 0x4c000064
68
69#define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI)
70#define inst_return(ins) (((ins)&M_RTS) == I_RTS)
71#define inst_call(ins) (((ins)&M_BC ) == I_BC || \
72 ((ins)&M_B ) == I_B )
73
74struct trapframe;
75void db_ktrap(int, db_regs_t *);
76
77#define DDB_STATE_NOT_RUNNING 0
78#define DDB_STATE_RUNNING 1
79#define DDB_STATE_EXITING 2
80
81/*
82 * We define some of our own commands
83 */
84#define DB_MACHINE_COMMANDS
85
86#endif /* _MACHINE_DB_MACHDEP_H_ */