1/* $OpenBSD: db_machdep.h,v 1.13 2021/08/30 08:11:12 jasper Exp $ */
2/* $NetBSD: db_machdep.h,v 1.5 2001/11/22 18:00:00 thorpej Exp $ */
3
4/*
5 * Copyright (c) 1996 Scott K Stevens
6 *
7 * Mach Operating System
8 * Copyright (c) 1991,1990 Carnegie Mellon University
9 * All Rights Reserved.
10 *
11 * Permission to use, copy, modify and distribute this software and its
12 * documentation is hereby granted, provided that both the copyright
13 * notice and this permission notice appear in all copies of the
14 * software, derivative works or modified versions, and any portions
15 * thereof, and that both notices appear in supporting documentation.
16 *
17 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
18 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
19 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
20 *
21 * Carnegie Mellon requests users of this software to return to
22 *
23 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
24 * School of Computer Science
25 * Carnegie Mellon University
26 * Pittsburgh PA 15213-3890
27 *
28 * any improvements or extensions that they make and grant Carnegie Mellon
29 * the rights to redistribute these changes.
30 */
31
32#ifndef _ARM_DB_MACHDEP_H_
33#define _ARM_DB_MACHDEP_H_
34
35/*
36 * Machine-dependent defines for new kernel debugger.
37 */
38
39#include <uvm/uvm_extern.h>
40#include <arm/armreg.h>
41#include <machine/frame.h>
42#include <machine/trap.h>
43
44/* end of mangling */
45
46typedef long db_expr_t; /* expression - signed */
47
48typedef trapframe_t db_regs_t;
49
50extern db_regs_t ddb_regs; /* register state */
51
52#define PC_REGS(regs) ((vaddr_t)(regs)->tf_pc)
53#define SET_PC_REGS(regs, value) (regs)->tf_pc = (register_t)(value)
54
55#define BKPT_INST (KERNEL_BREAKPOINT) /* breakpoint instruction */
56#define BKPT_SIZE (INSN_SIZE) /* size of breakpoint inst */
57#define BKPT_SET(inst) (BKPT_INST)
58
59/*#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_pc -= BKPT_SIZE)*/
60
61#define T_BREAKPOINT (1)
62
63#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
64#define IS_WATCHPOINT_TRAP(type, code) (0)
65
66#define inst_trap_return(ins) (0)
67/* ldmxx reg, {..., pc}
68 01800000 stack mode
69 000f0000 register
70 0000ffff register list */
71/* mov pc, reg
72 0000000f register */
73#define inst_return(ins) (((ins) & 0x0e108000) == 0x08108000 || \
74 ((ins) & 0x0ff0fff0) == 0x01a0f000)
75/* bl ...
76 00ffffff offset>>2 */
77#define inst_call(ins) (((ins) & 0x0f000000) == 0x0b000000)
78/* b ...
79 00ffffff offset>>2 */
80/* ldr pc, [pc, reg, lsl #2]
81 0000000f register */
82#define inst_branch(ins) (((ins) & 0x0f000000) == 0x0a000000 || \
83 ((ins) & 0x0fdffff0) == 0x079ff100)
84#define inst_unconditional_flow_transfer(ins) \
85 ((((ins) & INSN_COND_MASK) == INSN_COND_AL) && \
86 (inst_branch(ins) || inst_call(ins) || inst_return(ins)))
87
88#define getreg_val (0)
89#define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + INSN_SIZE))
90
91#define DB_MACHINE_COMMANDS
92
93#define SOFTWARE_SSTEP
94
95vaddr_t db_branch_taken(u_int inst, vaddr_t pc, db_regs_t *regs);
96int db_ktrap (int, db_regs_t *);
97void db_machine_init (void);
98
99#define branch_taken(ins, pc, fun, regs) \
100 db_branch_taken((ins), (pc), (regs))
101
102void db_show_frame_cmd(db_expr_t, int, db_expr_t, char *);
103
104#endif /* _ARM_DB_MACHDEP_H_ */