1/* $OpenBSD: db_machdep.h,v 1.19 2021/08/30 08:11:12 jasper Exp $ */
2/* $NetBSD: db_machdep.h,v 1.2 2003/04/29 17:06:04 scw Exp $ */
3
4/*
5 * Mach Operating System
6 * Copyright (c) 1991,1990 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#ifndef _MACHINE_DB_MACHDEP_H_
31#define _MACHINE_DB_MACHDEP_H_
32
33/*
34 * Machine-dependent defines for new kernel debugger.
35 */
36
37#include <sys/param.h>
38#include <uvm/uvm_extern.h>
39#include <machine/trap.h>
40#include <sys/mutex.h>
41
42typedef long db_expr_t; /* expression - signed */
43
44typedef struct trapframe db_regs_t;
45
46extern db_regs_t ddb_regs; /* register state */
47
48#define PC_REGS(regs) ((vaddr_t)(regs)->tf_rip)
49#define SET_PC_REGS(regs, value) (regs)->tf_rip = (int64_t)(value)
50
51#define BKPT_ADDR(addr) (addr) /* breakpoint address */
52#define BKPT_INST 0xcc /* breakpoint instruction */
53#define BKPT_SIZE (1) /* size of breakpoint inst */
54#define BKPT_SET(inst) (BKPT_INST)
55
56#define SSF_INST 0x55
57#define SSF_SIZE (1)
58
59#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_rip -= BKPT_SIZE)
60
61#define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T)
62#define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T)
63
64#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
65#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15)
66
67#define I_CALL 0xe8
68#define I_CALLI 0xff
69#define I_RET 0xc3
70#define I_IRET 0xcf
71
72#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
73#define inst_return(ins) (((ins)&0xff) == I_RET)
74#define inst_call(ins) (((ins)&0xff) == I_CALL || \
75 (((ins)&0xff) == I_CALLI && \
76 ((ins)&0x3800) == 0x1000))
77
78/* macro for checking if a thread has used floating-point */
79
80int db_ktrap(int, int, db_regs_t *);
81
82void db_machine_init(void);
83int db_enter_ddb(void);
84void db_startcpu(int);
85void db_stopcpu(int);
86void x86_ipi_db(struct cpu_info *);
87
88#define DDB_STATE_NOT_RUNNING 0
89#define DDB_STATE_RUNNING 1
90#define DDB_STATE_EXITING 2
91
92/*
93 * We define some of our own commands
94 */
95#define DB_MACHINE_COMMANDS
96
97extern void db_machine_init(void);
98
99extern void cpu_debug_dump(void);
100
101#endif /* _MACHINE_DB_MACHDEP_H_ */