1/*	$OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
2
3/*
4 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed under OpenBSD by
17 *	Per Fogelstrom, Opsycon AB, Sweden.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta
34 * $FreeBSD$
35 */
36
37#ifndef	_MIPS_DB_MACHDEP_H_
38#define	_MIPS_DB_MACHDEP_H_
39
40#include <machine/frame.h>
41#include <machine/trap.h>
42#include <machine/endian.h>
43
44typedef struct trapframe db_regs_t;
45extern db_regs_t	ddb_regs;	/* register state */
46
47typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
48typedef	register_t	db_expr_t;	/* expression - signed */
49
50#if BYTE_ORDER == _BIG_ENDIAN
51#define	BYTE_MSF	(1)
52#endif
53
54#define	SOFTWARE_SSTEP		/* Need software single step */
55#define	SOFTWARE_SSTEP_EMUL	/* next_instr_address() emulates 100% */
56db_addr_t	next_instr_address(db_addr_t, boolean_t);
57#define	BKPT_SIZE			(4)
58#define	BKPT_SET(ins)			(MIPS_BREAK_DDB)
59#define	DB_VALID_BREAKPOINT(addr)	(((addr) & 3) == 0)
60
61#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAK)
62#define	IS_WATCHPOINT_TRAP(type, code)	(0)	/* XXX mips3 watchpoint */
63
64#define	PC_REGS()	((db_addr_t)kdb_thrctx->pcb_regs.pc)
65#define	BKPT_SKIP					\
66	do {							\
67		if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) &	\
68		    ~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) {	\
69			kdb_frame->pc += BKPT_SIZE;			\
70			kdb_thrctx->pcb_regs.pc +=  BKPT_SIZE;		\
71		}							\
72	} while (0);
73
74
75/*
76 *  Test of instructions to see class.
77 */
78#define	IT_CALL		0x01
79#define	IT_BRANCH	0x02
80#define	IT_LOAD		0x03
81#define	IT_STORE	0x04
82
83#define	inst_branch(i)		(db_inst_type(i) == IT_BRANCH)
84#define	inst_trap_return(i)	((i) & 0)
85#define	inst_call(i)		(db_inst_type(i) == IT_CALL)
86#define	inst_return(i)		((i) == 0x03e00008)
87#define	inst_load(i)		(db_inst_type(i) == IT_LOAD)
88#define	inst_store(i)		(db_inst_type(i) == IT_STORE)
89
90#define	DB_SMALL_VALUE_MAX	0x7fffffff
91#define	DB_SMALL_VALUE_MIN	(-0x400001)
92
93int db_inst_type(int);
94db_addr_t branch_taken(int inst, db_addr_t pc);
95void stacktrace_subr(register_t pc, register_t sp, register_t ra, int (*)(const char *, ...));
96int32_t kdbpeek(int *);
97int64_t kdbpeekd(int *);
98
99#endif	/* !_MIPS_DB_MACHDEP_H_ */
100