db_machdep.h revision 1.13 
1/*	$NetBSD: db_machdep.h,v 1.13 1999/04/30 13:28:36 christos 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	_SPARC_DB_MACHDEP_H_
30#define	_SPARC_DB_MACHDEP_H_
31
32/*
33 * Machine-dependent defines for new kernel debugger.
34 */
35
36
37#include <vm/vm.h>
38#include <machine/frame.h>
39#include <machine/psl.h>
40#include <machine/trap.h>
41#include <machine/reg.h>
42
43/* end of mangling */
44
45typedef	vaddr_t		db_addr_t;	/* address - unsigned */
46typedef	long		db_expr_t;	/* expression - signed */
47
48typedef struct {
49	struct trapframe db_tf;
50	struct frame	 db_fr;
51} db_regs_t;
52
53db_regs_t		ddb_regs;	/* register state */
54#define	DDB_REGS	(&ddb_regs)
55#define	DDB_TF		(&ddb_regs.db_tf)
56#define	DDB_FR		(&ddb_regs.db_fr)
57
58#if defined(lint)
59#define	PC_REGS(regs)	((regs)->db_tf.tf_pc)
60#else
61#define	PC_REGS(regs)	((db_addr_t)(regs)->db_tf.tf_pc)
62#endif
63#define	PC_ADVANCE(regs) do {				\
64	int n = (regs)->db_tf.tf_npc;			\
65	(regs)->db_tf.tf_pc = n;			\
66	(regs)->db_tf.tf_npc = n + 4;			\
67} while(0)
68
69#define	BKPT_INST	0x91d02001	/* breakpoint instruction */
70#define	BKPT_SIZE	(4)		/* size of breakpoint inst */
71#define	BKPT_SET(inst)	(BKPT_INST)
72
73#define	IS_BREAKPOINT_TRAP(type, code)	\
74	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
75#define IS_WATCHPOINT_TRAP(type, code)	(0)
76
77/*
78 * Sparc cpus have no hardware single-step.
79 */
80#define SOFTWARE_SSTEP
81
82boolean_t	db_inst_trap_return __P((int inst));
83boolean_t	db_inst_return __P((int inst));
84boolean_t	db_inst_call __P((int inst));
85boolean_t	db_inst_branch __P((int inst));
86int		db_inst_load __P((int inst));
87int		db_inst_store __P((int inst));
88boolean_t	db_inst_unconditional_flow_transfer __P((int inst));
89db_addr_t	db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
90
91#define inst_trap_return(ins)	db_inst_trap_return(ins)
92#define inst_return(ins)	db_inst_return(ins)
93#define inst_call(ins)		db_inst_call(ins)
94#define inst_branch(ins)	db_inst_branch(ins)
95#define inst_load(ins)		db_inst_load(ins)
96#define inst_store(ins)		db_inst_store(ins)
97#define	inst_unconditional_flow_transfer(ins) \
98				db_inst_unconditional_flow_transfer(ins)
99#define branch_taken(ins, pc, regs) \
100				db_branch_taken((ins), (pc), (regs))
101
102/* see note in db_interface.c about reversed breakpoint addrs */
103#define next_instr_address(pc, bd) \
104	((bd) ? (pc) : ddb_regs.db_tf.tf_npc)
105
106
107
108#define DB_MACHINE_COMMANDS
109
110void db_machine_init __P((void));
111int kdb_trap __P((int, struct trapframe *));
112
113/*
114 * We use both a.out and elf symbols in DDB.
115 */
116#define	DB_AOUT_SYMBOLS
117#define	DB_ELF_SYMBOLS
118#define DB_ELFSIZE 32
119
120
121/*
122 * KGDB definitions
123 */
124typedef u_long		kgdb_reg_t;
125#define KGDB_NUMREGS	72
126#define KGDB_BUFLEN	1024
127
128#endif	/* _SPARC_DB_MACHDEP_H_ */
129