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);
43int kprobe_exceptions_notify(struct notifier_block *self,
44			     unsigned long val, void *data);
45
46/* optinsn template addresses */
47extern __visible kprobe_opcode_t optprobe_template_entry;
48extern __visible kprobe_opcode_t optprobe_template_val;
49extern __visible kprobe_opcode_t optprobe_template_call;
50extern __visible kprobe_opcode_t optprobe_template_end;
51extern __visible kprobe_opcode_t optprobe_template_sub_sp;
52extern __visible kprobe_opcode_t optprobe_template_add_sp;
53extern __visible kprobe_opcode_t optprobe_template_restore_begin;
54extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
55extern __visible kprobe_opcode_t optprobe_template_restore_end;
56
57#define MAX_OPTIMIZED_LENGTH	4
58#define MAX_OPTINSN_SIZE				\
59	((unsigned long)&optprobe_template_end -	\
60	 (unsigned long)&optprobe_template_entry)
61#define RELATIVEJUMP_SIZE	4
62
63struct arch_optimized_insn {
64	/*
65	 * copy of the original instructions.
66	 * Different from x86, ARM kprobe_opcode_t is u32.
67	 */
68#define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
69	kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
70	/* detour code buffer */
71	kprobe_opcode_t *insn;
72	/*
73	 * We always copy one instruction on ARM,
74	 * so size will always be 4, and unlike x86, there is no
75	 * need for a size field.
76	 */
77};
78
79#endif /* CONFIG_KPROBES */
80#endif /* _ARM_KPROBES_H */

 
 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 <asm-generic/kprobes.h>
20
21#ifdef CONFIG_KPROBES
22#include <linux/types.h>
23#include <linux/ptrace.h>
24#include <linux/notifier.h>
25
26#define __ARCH_WANT_KPROBES_INSN_SLOT
27#define MAX_INSN_SIZE			2
28
29#define flush_insn_slot(p)		do { } while (0)
30#define kretprobe_blacklist_size	0
31
32typedef u32 kprobe_opcode_t;
33struct kprobe;
34#include <asm/probes.h>
35
36#define	arch_specific_insn	arch_probes_insn
37
38struct prev_kprobe {
39	struct kprobe *kp;
40	unsigned int status;
41};
42
43/* per-cpu kprobe control block */
44struct kprobe_ctlblk {
45	unsigned int kprobe_status;
46	struct prev_kprobe prev_kprobe;
47	struct pt_regs jprobe_saved_regs;
48	char jprobes_stack[MAX_STACK_SIZE];
49};
50
51void arch_remove_kprobe(struct kprobe *);
52int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
53int kprobe_exceptions_notify(struct notifier_block *self,
54			     unsigned long val, void *data);
55
56/* optinsn template addresses */
57extern __visible kprobe_opcode_t optprobe_template_entry;
58extern __visible kprobe_opcode_t optprobe_template_val;
59extern __visible kprobe_opcode_t optprobe_template_call;
60extern __visible kprobe_opcode_t optprobe_template_end;
61extern __visible kprobe_opcode_t optprobe_template_sub_sp;
62extern __visible kprobe_opcode_t optprobe_template_add_sp;
63extern __visible kprobe_opcode_t optprobe_template_restore_begin;
64extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
65extern __visible kprobe_opcode_t optprobe_template_restore_end;
66
67#define MAX_OPTIMIZED_LENGTH	4
68#define MAX_OPTINSN_SIZE				\
69	((unsigned long)&optprobe_template_end -	\
70	 (unsigned long)&optprobe_template_entry)
71#define RELATIVEJUMP_SIZE	4
72
73struct arch_optimized_insn {
74	/*
75	 * copy of the original instructions.
76	 * Different from x86, ARM kprobe_opcode_t is u32.
77	 */
78#define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
79	kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
80	/* detour code buffer */
81	kprobe_opcode_t *insn;
82	/*
83	 * We always copy one instruction on ARM,
84	 * so size will always be 4, and unlike x86, there is no
85	 * need for a size field.
86	 */
87};
88
89#endif /* CONFIG_KPROBES */
90#endif /* _ARM_KPROBES_H */