1/*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 *
26 *	from: FreeBSD: src/sys/i386/include/db_machdep.h,v 1.16 1999/10/04
27 * $FreeBSD$
28 */
29
30#ifndef	_MACHINE_DB_MACHDEP_H_
31#define	_MACHINE_DB_MACHDEP_H_
32
33#include <machine/frame.h>
34#include <machine/trap.h>
35#include <machine/armreg.h>
36
37#define T_BREAKPOINT	(1)
38#define T_WATCHPOINT	(2)
39typedef vm_offset_t	db_addr_t;
40typedef int		db_expr_t;
41
42#define	PC_REGS()	((db_addr_t)kdb_thrctx->pcb_regs.sf_pc)
43
44#define	BKPT_INST	(KERNEL_BREAKPOINT)
45#define	BKPT_SIZE	(INSN_SIZE)
46#define	BKPT_SET(inst)	(BKPT_INST)
47
48#define	BKPT_SKIP do {							\
49	kdb_frame->tf_pc += BKPT_SIZE; \
50} while (0)
51
52#if __ARM_ARCH >= 6
53#define	db_clear_single_step	kdb_cpu_clear_singlestep
54#define	db_set_single_step	kdb_cpu_set_singlestep
55#define	db_pc_is_singlestep	kdb_cpu_pc_is_singlestep
56#else
57#define	SOFTWARE_SSTEP  1
58#endif
59
60#define	IS_BREAKPOINT_TRAP(type, code)	(type == T_BREAKPOINT)
61#define	IS_WATCHPOINT_TRAP(type, code)	(type == T_WATCHPOINT)
62
63#define	inst_trap_return(ins)	(0)
64/* ldmxx reg, {..., pc}
65					    01800000  stack mode
66					    000f0000  register
67					    0000ffff  register list */
68/* mov pc, reg
69					    0000000f  register */
70#define	inst_return(ins)	(((ins) & 0x0e108000) == 0x08108000 || \
71				 ((ins) & 0x0ff0fff0) == 0x01a0f000 ||	\
72				 ((ins) & 0x0ffffff0) == 0x012fff10) /* bx */
73/* bl ...
74					    00ffffff  offset>>2 */
75#define	inst_call(ins)		(((ins) & 0x0f000000) == 0x0b000000)
76/* b ...
77					    00ffffff  offset>>2 */
78/* ldr pc, [pc, reg, lsl #2]
79					    0000000f  register */
80
81#define	inst_branch(ins)	(((ins) & 0x0f000000) == 0x0a000000 || \
82				 ((ins) & 0x0fdffff0) == 0x079ff100 || \
83				 ((ins) & 0x0cd0f000) == 0x0490f000 || \
84				 ((ins) & 0x0ffffff0) == 0x012fff30 || /* blx */ \
85				 ((ins) & 0x0de0f000) == 0x0080f000)
86
87#define	inst_load(ins)		(0)
88#define	inst_store(ins)		(0)
89
90#define next_instr_address(pc, bd)	((bd) ? (pc) : ((pc) + INSN_SIZE))
91
92#define	DB_SMALL_VALUE_MAX	(0x7fffffff)
93#define	DB_SMALL_VALUE_MIN	(-0x40001)
94
95#define	DB_ELFSIZE		32
96
97int db_validate_address(vm_offset_t);
98
99u_int branch_taken (u_int insn, db_addr_t pc);
100
101#ifdef __ARMEB__
102#define BYTE_MSF	(1)
103#endif
104#endif /* !_MACHINE_DB_MACHDEP_H_ */
105