db_machdep.h revision 1.29 
1/*	$NetBSD: db_machdep.h,v 1.29 2011/04/11 04:22:30 mrg 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#include <sys/types.h>
36
37/*
38 * XXX - Would rather not pull in vm headers, but need boolean_t,
39 * at least until boolean_t moves to <sys/types.h> or someplace.
40 */
41#include <uvm/uvm_param.h>
42
43#include <machine/frame.h>
44#include <machine/pcb.h>
45#include <machine/psl.h>
46#include <machine/trap.h>
47
48typedef	vaddr_t		db_addr_t;	/* address - unsigned */
49typedef	long		db_expr_t;	/* expression - signed */
50typedef struct trapframe db_regs_t;
51
52extern db_regs_t	ddb_regs;	/* register state */
53#define DDB_REGS	(&ddb_regs)
54
55#define	PC_REGS(regs)	((regs)->tf_pc)
56
57#define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
58#define	BKPT_INST	0x4e4f		/* breakpoint instruction */
59#define	BKPT_SIZE	(2)		/* size of breakpoint inst */
60#define	BKPT_SET(inst, addr)	(BKPT_INST)
61
62#define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_pc -= BKPT_SIZE)
63
64#define	db_clear_single_step(regs)	((regs)->tf_sr &= ~PSL_T)
65#define	db_set_single_step(regs)	((regs)->tf_sr |=  PSL_T)
66
67#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
68#ifdef T_WATCHPOINT
69#define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)
70#else
71#define	IS_WATCHPOINT_TRAP(type, code)	0
72#endif
73
74#define	M_RTS		0xffff0000
75#define I_RTS		0x4e750000
76#define M_JSR		0xffc00000
77#define I_JSR		0x4e800000
78#define M_BSR		0xff000000
79#define I_BSR		0x61000000
80#define	M_RTE		0xffff0000
81#define	I_RTE		0x4e730000
82
83#define	inst_trap_return(ins)	(((ins)&M_RTE) == I_RTE)
84#define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)
85#define	inst_call(ins)		(((ins)&M_JSR) == I_JSR || \
86				 ((ins)&M_BSR) == I_BSR)
87#define inst_load(ins)		0
88#define inst_store(ins)		0
89
90/*
91 * Things needed by kgdb:
92 */
93typedef long kgdb_reg_t;
94#define KGDB_NUMREGS	(16+2)
95#define KGDB_BUFLEN	512
96
97
98#ifdef _KERNEL
99
100void	Debugger(void);		/* XXX */
101void	kdb_kintr(db_regs_t *);
102int 	kdb_trap(int, db_regs_t *);
103
104#endif /* _KERNEL */
105
106/*
107 * We use Elf32 symbols in DDB.
108 */
109#define	DB_ELF_SYMBOLS
110#define	DB_ELFSIZE	32
111
112#endif	/* _M68K_DB_MACHDEP_H_ */
113