1/*	$NetBSD: db_machdep.h,v 1.18 2011/05/26 15:34:14 joerg Exp $	*/
2
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 "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#ifndef	_VAX_DB_MACHDEP_H_
30#define	_VAX_DB_MACHDEP_H_
31
32/*
33 * Machine-dependent defines for new kernel debugger.
34 * Modified for vax out of i386 code.
35 */
36
37#include <sys/param.h>
38#include <uvm/uvm.h>
39#include <machine/trap.h>
40#include <machine/psl.h>
41
42typedef	vaddr_t		db_addr_t;	/* address - unsigned */
43#define	DDB_EXPR_FMT	"l"		/* expression is long */
44typedef	long		db_expr_t;	/* expression - signed */
45
46typedef struct trapframe db_regs_t;
47extern	db_regs_t	ddb_regs;	/* register state */
48#define	DDB_REGS	(&ddb_regs)
49
50#define	PC_REGS(regs)	(*(db_addr_t *)&(regs)->tf_pc)
51
52#define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
53#define	BKPT_INST	0x03		/* breakpoint instruction */
54#define	BKPT_SIZE	(1)		/* size of breakpoint inst */
55#define	BKPT_SET(inst, addr)	(BKPT_INST)
56
57#define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_pc -= BKPT_SIZE)
58
59#define	db_clear_single_step(regs)	((regs)->tf_psl &= ~PSL_T)
60#define	db_set_single_step(regs)	((regs)->tf_psl |=  PSL_T)
61
62#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BPTFLT)
63#define IS_WATCHPOINT_TRAP(type, code)	((type) == T_TRCTRAP)
64
65#define	I_CALL		0xfb
66#define	I_RET		0x04
67#define	I_IRET		0x02
68
69#define	inst_trap_return(ins)	(((ins)&0xff) == I_IRET)
70#define	inst_return(ins)	(((ins)&0xff) == I_RET)
71#define	inst_call(ins)		(((ins)&0xff) == I_CALL)
72
73#define inst_load(ins)		0
74#define inst_store(ins)		0
75
76#define DB_MACHINE_COMMANDS
77
78/* Prototypes */
79void	kdb_trap(struct trapframe *);
80
81/*
82 * We use a.out symbols in DDB (unless we are ELF then we use ELF symbols).
83 */
84#define	DB_ELF_SYMBOLS
85#define	DB_ELFSIZE		32
86
87#endif	/* _VAX_DB_MACHDEP_H_ */
88