xref: /freebsd/sys/ddb/db_break.h (revision 031beb4e239bfce798af17f5fe8dba8bcaf13d99)
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 
29 /*
30  *	Author: David B. Golub, Carnegie Mellon University
31  *	Date:	7/90
32  */
33 #ifndef _DDB_DB_BREAK_H_
34 #define	_DDB_DB_BREAK_H_
35 
36 /*
37  * Breakpoint.
38  */
39 
40 #ifndef BKPT_INST_TYPE
41 #define	BKPT_INST_TYPE int
42 #endif
43 
44 struct db_breakpoint {
45 	vm_map_t map;			/* in this map */
46 	db_addr_t address;		/* set here */
47 	int	init_count;		/* number of times to skip bkpt */
48 	int	count;			/* current count */
49 	int	flags;			/* flags: */
50 #define	BKPT_SINGLE_STEP	0x2	    /* to simulate single step */
51 #define	BKPT_TEMP		0x4	    /* temporary */
52 	BKPT_INST_TYPE bkpt_inst;	/* saved instruction at bkpt */
53 	struct db_breakpoint *link;	/* link in in-use or free chain */
54 };
55 typedef struct db_breakpoint *db_breakpoint_t;
56 
57 void		db_clear_breakpoints(void);
58 db_breakpoint_t	db_find_breakpoint_here(db_addr_t addr);
59 void		db_set_breakpoints(void);
60 
61 #endif /* !_DDB_DB_BREAK_H_ */
62