1/*-
2 * SPDX-License-Identifier: MIT-CMU
3 *
4 * Mach Operating System
5 * Copyright (c) 1991,1990 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
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 the
26 * rights to redistribute these changes.
27 *
28 * $FreeBSD$
29 */
30
31/*
32 *	Author: David B. Golub, Carnegie Mellon University
33 *	Date:	7/90
34 */
35
36#ifndef _DDB_DB_VARIABLES_H_
37#define	_DDB_DB_VARIABLES_H_
38
39/*
40 * Debugger variables.
41 */
42struct db_variable;
43typedef	int	db_varfcn_t(struct db_variable *vp, db_expr_t *valuep, int op);
44struct db_variable {
45	char	*name;		/* Name of variable */
46	db_expr_t *valuep;	/* value of variable */
47				/* function to call when reading/writing */
48	db_varfcn_t *fcn;
49#define	DB_VAR_GET	0
50#define	DB_VAR_SET	1
51};
52#define	FCN_NULL	((db_varfcn_t *)0)
53
54extern struct db_variable	db_regs[];	/* machine registers */
55extern struct db_variable	*db_eregs;
56
57extern db_varfcn_t	db_var_curcpu;		/* DPCPU default CPU */
58extern db_varfcn_t	db_var_curvnet;		/* Default vnet */
59extern db_varfcn_t	db_var_db_cpu;		/* DPCPU active CPU */
60extern db_varfcn_t	db_var_db_vnet;		/* Active vnet */
61
62int db_read_variable(struct db_variable *, db_expr_t *);
63int db_write_variable(struct db_variable *, db_expr_t);
64
65#endif /* _!DDB_DB_VARIABLES_H_ */
66