1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * arch/arm/include/asm/probes.h
 4 *
 5 * Original contents copied from arch/arm/include/asm/kprobes.h
 6 * which contains the following notice...
 7 *
 8 * Copyright (C) 2006, 2007 Motorola Inc.
 9 */
10
11#ifndef _ASM_PROBES_H
12#define _ASM_PROBES_H
13
14#ifndef __ASSEMBLY__
15
16typedef u32 probes_opcode_t;
17
18struct arch_probes_insn;
19typedef void (probes_insn_handler_t)(probes_opcode_t,
20				     struct arch_probes_insn *,
21				     struct pt_regs *);
22typedef unsigned long (probes_check_cc)(unsigned long);
23typedef void (probes_insn_singlestep_t)(probes_opcode_t,
24					struct arch_probes_insn *,
25					struct pt_regs *);
26typedef void (probes_insn_fn_t)(void);
27
28/* Architecture specific copy of original instruction. */
29struct arch_probes_insn {
30	probes_opcode_t			*insn;
31	probes_insn_handler_t		*insn_handler;
32	probes_check_cc			*insn_check_cc;
33	probes_insn_singlestep_t	*insn_singlestep;
34	probes_insn_fn_t		*insn_fn;
35	int				stack_space;
36	unsigned long			register_usage_flags;
37	bool				kprobe_direct_exec;
38};
39
40#endif /* __ASSEMBLY__ */
41
42/*
43 * We assume one instruction can consume at most 64 bytes stack, which is
44 * 'push {r0-r15}'. Instructions consume more or unknown stack space like
45 * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe.
46 */
47#define MAX_STACK_SIZE			64
48
49#endif