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
16 typedef u32 probes_opcode_t;
17
18 struct arch_probes_insn;
19 typedef void (probes_insn_handler_t)(probes_opcode_t,
20 struct arch_probes_insn *,
21 struct pt_regs *);
22 typedef unsigned long (probes_check_cc)(unsigned long);
23 typedef void (probes_insn_singlestep_t)(probes_opcode_t,
24 struct arch_probes_insn *,
25 struct pt_regs *);
26 typedef void (probes_insn_fn_t)(void);
27
28 /* Architecture specific copy of original instruction. */
29 struct 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