1/*
 2 * arch/arm/include/asm/kprobes.h
 3 *
 4 * Copyright (C) 2006, 2007 Motorola Inc.
 5 *
 6 * This program is free software; you can redistribute it and/or modify
 7 * it under the terms of the GNU General Public License version 2 as
 8 * published by the Free Software Foundation.
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * General Public License for more details.
14 */
15
16#ifndef _ARM_KPROBES_H
17#define _ARM_KPROBES_H
18
 
 
 
19#include <linux/types.h>
20#include <linux/ptrace.h>
21#include <linux/notifier.h>
22
23#define __ARCH_WANT_KPROBES_INSN_SLOT
24#define MAX_INSN_SIZE			2
25
26#define flush_insn_slot(p)		do { } while (0)
27#define kretprobe_blacklist_size	0
28
29typedef u32 kprobe_opcode_t;
30struct kprobe;
31#include <asm/probes.h>
32
33#define	arch_specific_insn	arch_probes_insn
34
35struct prev_kprobe {
36	struct kprobe *kp;
37	unsigned int status;
38};
39
40/* per-cpu kprobe control block */
41struct kprobe_ctlblk {
42	unsigned int kprobe_status;
43	struct prev_kprobe prev_kprobe;
44	struct pt_regs jprobe_saved_regs;
45	char jprobes_stack[MAX_STACK_SIZE];
46};
47
48void arch_remove_kprobe(struct kprobe *);
49int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
50int kprobe_exceptions_notify(struct notifier_block *self,
51			     unsigned long val, void *data);
52
53/* optinsn template addresses */
54extern __visible kprobe_opcode_t optprobe_template_entry;
55extern __visible kprobe_opcode_t optprobe_template_val;
56extern __visible kprobe_opcode_t optprobe_template_call;
57extern __visible kprobe_opcode_t optprobe_template_end;
58extern __visible kprobe_opcode_t optprobe_template_sub_sp;
59extern __visible kprobe_opcode_t optprobe_template_add_sp;
60extern __visible kprobe_opcode_t optprobe_template_restore_begin;
61extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
62extern __visible kprobe_opcode_t optprobe_template_restore_end;
63
64#define MAX_OPTIMIZED_LENGTH	4
65#define MAX_OPTINSN_SIZE				\
66	((unsigned long)&optprobe_template_end -	\
67	 (unsigned long)&optprobe_template_entry)
68#define RELATIVEJUMP_SIZE	4
69
70struct arch_optimized_insn {
71	/*
72	 * copy of the original instructions.
73	 * Different from x86, ARM kprobe_opcode_t is u32.
74	 */
75#define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
76	kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
77	/* detour code buffer */
78	kprobe_opcode_t *insn;
79	/*
80	 * We always copy one instruction on ARM,
81	 * so size will always be 4, and unlike x86, there is no
82	 * need for a size field.
83	 */
84};
85
 
86#endif /* _ARM_KPROBES_H */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * arch/arm/include/asm/kprobes.h
 4 *
 5 * Copyright (C) 2006, 2007 Motorola Inc.
 
 
 
 
 
 
 
 
 
 6 */
 7
 8#ifndef _ARM_KPROBES_H
 9#define _ARM_KPROBES_H
10
11#include <asm-generic/kprobes.h>
12
13#ifdef CONFIG_KPROBES
14#include <linux/types.h>
15#include <linux/ptrace.h>
16#include <linux/notifier.h>
17
18#define __ARCH_WANT_KPROBES_INSN_SLOT
19#define MAX_INSN_SIZE			2
20
21#define flush_insn_slot(p)		do { } while (0)
22#define kretprobe_blacklist_size	0
23
24typedef u32 kprobe_opcode_t;
25struct kprobe;
26#include <asm/probes.h>
27
28#define	arch_specific_insn	arch_probes_insn
29
30struct prev_kprobe {
31	struct kprobe *kp;
32	unsigned int status;
33};
34
35/* per-cpu kprobe control block */
36struct kprobe_ctlblk {
37	unsigned int kprobe_status;
38	struct prev_kprobe prev_kprobe;
 
 
39};
40
41void arch_remove_kprobe(struct kprobe *);
42int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
 
 
43
44/* optinsn template addresses */
45extern __visible kprobe_opcode_t optprobe_template_entry[];
46extern __visible kprobe_opcode_t optprobe_template_val[];
47extern __visible kprobe_opcode_t optprobe_template_call[];
48extern __visible kprobe_opcode_t optprobe_template_end[];
49extern __visible kprobe_opcode_t optprobe_template_sub_sp[];
50extern __visible kprobe_opcode_t optprobe_template_add_sp[];
51extern __visible kprobe_opcode_t optprobe_template_restore_begin[];
52extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn[];
53extern __visible kprobe_opcode_t optprobe_template_restore_end[];
54
55#define MAX_OPTIMIZED_LENGTH	4
56#define MAX_OPTINSN_SIZE				\
57	((unsigned long)optprobe_template_end -	\
58	 (unsigned long)optprobe_template_entry)
59#define RELATIVEJUMP_SIZE	4
60
61struct arch_optimized_insn {
62	/*
63	 * copy of the original instructions.
64	 * Different from x86, ARM kprobe_opcode_t is u32.
65	 */
66#define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
67	kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
68	/* detour code buffer */
69	kprobe_opcode_t *insn;
70	/*
71	 * We always copy one instruction on ARM,
72	 * so size will always be 4, and unlike x86, there is no
73	 * need for a size field.
74	 */
75};
76
77#endif /* CONFIG_KPROBES */
78#endif /* _ARM_KPROBES_H */