1/*
 2 * arch/arm/include/asm/probes.h
 3 *
 4 * Original contents copied from arch/arm/include/asm/kprobes.h
 5 * which contains the following notice...
 6 *
 7 * Copyright (C) 2006, 2007 Motorola Inc.
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 */
18
19#ifndef _ASM_PROBES_H
20#define _ASM_PROBES_H
21
22#ifndef __ASSEMBLY__
23
24typedef u32 probes_opcode_t;
25
26struct arch_probes_insn;
27typedef void (probes_insn_handler_t)(probes_opcode_t,
28				     struct arch_probes_insn *,
29				     struct pt_regs *);
30typedef unsigned long (probes_check_cc)(unsigned long);
31typedef void (probes_insn_singlestep_t)(probes_opcode_t,
32					struct arch_probes_insn *,
33					struct pt_regs *);
34typedef void (probes_insn_fn_t)(void);
35
36/* Architecture specific copy of original instruction. */
37struct arch_probes_insn {
38	probes_opcode_t			*insn;
39	probes_insn_handler_t		*insn_handler;
40	probes_check_cc			*insn_check_cc;
41	probes_insn_singlestep_t	*insn_singlestep;
42	probes_insn_fn_t		*insn_fn;
43	int				stack_space;
44	unsigned long			register_usage_flags;
45	bool				kprobe_direct_exec;
46};
47
48#endif /* __ASSEMBLY__ */
49
50/*
51 * We assume one instruction can consume at most 64 bytes stack, which is
52 * 'push {r0-r15}'. Instructions consume more or unknown stack space like
53 * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe.
54 * Both kprobe and jprobe use this macro.
55 */
56#define MAX_STACK_SIZE			64
57
58#endif