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/percpu.h>
22
23#define __ARCH_WANT_KPROBES_INSN_SLOT
24#define MAX_INSN_SIZE			2
25#define MAX_STACK_SIZE			64	/* 32 would probably be OK */
26
27#define flush_insn_slot(p)		do { } while (0)
28#define kretprobe_blacklist_size	0
29
30typedef u32 kprobe_opcode_t;
31
32struct kprobe;
33typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
34typedef unsigned long (kprobe_check_cc)(unsigned long);
35typedef void (kprobe_insn_singlestep_t)(struct kprobe *, struct pt_regs *);
36typedef void (kprobe_insn_fn_t)(void);
37
38/* Architecture specific copy of original instruction. */
39struct arch_specific_insn {
40	kprobe_opcode_t			*insn;
41	kprobe_insn_handler_t		*insn_handler;
42	kprobe_check_cc			*insn_check_cc;
43	kprobe_insn_singlestep_t	*insn_singlestep;
44	kprobe_insn_fn_t		*insn_fn;
45};
46
47struct prev_kprobe {
48	struct kprobe *kp;
49	unsigned int status;
50};
51
52/* per-cpu kprobe control block */
53struct kprobe_ctlblk {
54	unsigned int kprobe_status;
55	struct prev_kprobe prev_kprobe;
56	struct pt_regs jprobe_saved_regs;
57	char jprobes_stack[MAX_STACK_SIZE];
58};
59
60void arch_remove_kprobe(struct kprobe *);
61int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
62int kprobe_exceptions_notify(struct notifier_block *self,
63			     unsigned long val, void *data);
64
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
65
 
66#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);
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 */