1/*-
2 * Mach Operating System
3 * Copyright (c) 1992 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 * $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $
27 * $NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $
28 */
29
30/*
31 * Machine-dependent defines for new kernel debugger.
32 */
33#ifndef _POWERPC_DB_MACHDEP_H_
34#define _POWERPC_DB_MACHDEP_H_
35
36#include <vm/vm_param.h>
37#include <machine/elf.h>
38
39#define DB_ELF_SYMBOLS
40#define DB_ELFSIZE __ELF_WORD_SIZE
41
42typedef vm_offset_t db_addr_t; /* address - unsigned */
43typedef intptr_t db_expr_t; /* expression - signed */
44
45#define PC_REGS(regs) ((db_addr_t)kdb_thrctx->pcb_lr)
46
47#define BKPT_INST 0x7C810808 /* breakpoint instruction */
48
49#define BKPT_SIZE (4) /* size of breakpoint inst */
50#define BKPT_SET(inst) (BKPT_INST)
51
52#define db_clear_single_step kdb_cpu_clear_singlestep
53#define db_set_single_step kdb_cpu_set_singlestep
54
55#if 0
56#define SR_SINGLESTEP 0x400
57#define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP)
58#define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP)
59#endif
60
61#define T_BREAKPOINT 0xffff
62#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
63
64#define T_WATCHPOINT 0xeeee
65#ifdef T_WATCHPOINT
66#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
67#else
68#define IS_WATCHPOINT_TRAP(type, code) 0
69#endif
70
71#define M_RTS 0xfc0007fe
72#define I_RTS 0x4c000020
73#define M_BC 0xfc000000
74#define I_BC 0x40000000
75#define M_B 0xfc000000
76#define I_B 0x50000000
77#define M_RFI 0xfc0007fe
78#define I_RFI 0x4c000064
79
80#define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI)
81#define inst_return(ins) (((ins)&M_RTS) == I_RTS)
82#define inst_call(ins) (((ins)&M_BC ) == I_BC || \
83 ((ins)&M_B ) == I_B )
84#define inst_load(ins) 0
85#define inst_store(ins) 0
86
87#endif /* _POWERPC_DB_MACHDEP_H_ */