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