1/*	$NetBSD: db_machdep.h,v 1.35 2023/09/26 14:33:55 tsutsui Exp $	*/
2
3/*
4 * Mach Operating System
5 * Copyright (c) 1992 Carnegie Mellon University
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
21 *  School of Computer Science
22 *  Carnegie Mellon University
23 *  Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie Mellon
26 * the rights to redistribute these changes.
27 */
28
29/*
30 * Machine-dependent defines for new kernel debugger.
31 */
32#ifndef	_M68K_DB_MACHDEP_H_
33#define	_M68K_DB_MACHDEP_H_
34
35#if !defined(_KERNEL) && !defined(_STANDALONE)
36#include <stddef.h>
37#include <stdbool.h>
38#include <string.h>
39#endif /* _KERNEL || _STANDALONE */
40
41#include <sys/types.h>
42
43#include <uvm/uvm_extern.h>
44
45#include <machine/frame.h>
46#include <machine/pcb.h>
47#include <machine/psl.h>
48#include <machine/trap.h>
49
50typedef	vaddr_t		db_addr_t;	/* address - unsigned */
51#define	DDB_EXPR_FMT	"l"		/* expression is long */
52typedef	long		db_expr_t;	/* expression - signed */
53typedef struct trapframe db_regs_t;
54
55extern db_regs_t	ddb_regs;	/* register state */
56#define DDB_REGS	(&ddb_regs)
57
58#define	PC_REGS(regs)	((regs)->tf_pc)
59
60#define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
61#define	BKPT_INST	0x4e4f		/* breakpoint instruction */
62#define	BKPT_SIZE	(2)		/* size of breakpoint inst */
63#define	BKPT_SET(inst, addr)	(BKPT_INST)
64
65#define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_pc -= BKPT_SIZE)
66
67#define	db_clear_single_step(regs)	((regs)->tf_sr &= ~PSL_T)
68#define	db_set_single_step(regs)	((regs)->tf_sr |=  PSL_T)
69
70#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
71#ifdef T_WATCHPOINT
72#define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)
73#else
74#define	IS_WATCHPOINT_TRAP(type, code)	0
75#endif
76
77#define	M_RTS		0xffff0000
78#define I_RTS		0x4e750000
79#define M_JSR		0xffc00000
80#define I_JSR		0x4e800000
81#define M_BSR		0xff000000
82#define I_BSR		0x61000000
83#define	M_RTE		0xffff0000
84#define	I_RTE		0x4e730000
85
86#define	inst_trap_return(ins)	(((ins)&M_RTE) == I_RTE)
87#define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)
88#define	inst_call(ins)		(((ins)&M_JSR) == I_JSR || \
89				 ((ins)&M_BSR) == I_BSR)
90#define inst_load(ins)		0
91#define inst_store(ins)		0
92
93/*
94 * Things needed by kgdb:
95 */
96typedef long kgdb_reg_t;
97#define KGDB_NUMREGS	(16+2)
98#define KGDB_BUFLEN	512
99
100
101#ifdef _KERNEL
102
103void	Debugger(void);		/* XXX */
104void	kdb_kintr(db_regs_t *);
105int	kdb_trap(int, db_regs_t *);
106
107#endif /* _KERNEL */
108
109/*
110 * We use Elf32 symbols in DDB.
111 */
112#define	DB_ELF_SYMBOLS
113
114#endif	/* _M68K_DB_MACHDEP_H_ */
115