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 regs_return_value(regs)		((regs)->ARM_r0)
28#define flush_insn_slot(p)		do { } while (0)
29#define kretprobe_blacklist_size	0
30
31typedef u32 kprobe_opcode_t;
32
33struct kprobe;
34typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
35typedef unsigned long (kprobe_check_cc)(unsigned long);
36typedef void (kprobe_insn_singlestep_t)(struct kprobe *, struct pt_regs *);
37typedef void (kprobe_insn_fn_t)(void);
38
39/* Architecture specific copy of original instruction. */
40struct arch_specific_insn {
41	kprobe_opcode_t			*insn;
42	kprobe_insn_handler_t		*insn_handler;
43	kprobe_check_cc			*insn_check_cc;
44	kprobe_insn_singlestep_t	*insn_singlestep;
45	kprobe_insn_fn_t		*insn_fn;
46};
47
48struct prev_kprobe {
49	struct kprobe *kp;
50	unsigned int status;
51};
52
53/* per-cpu kprobe control block */
54struct kprobe_ctlblk {
55	unsigned int kprobe_status;
56	struct prev_kprobe prev_kprobe;
57	struct pt_regs jprobe_saved_regs;
58	char jprobes_stack[MAX_STACK_SIZE];
59};
60
61void arch_remove_kprobe(struct kprobe *);
62int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
63int kprobe_exceptions_notify(struct notifier_block *self,
64			     unsigned long val, void *data);
65
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
66
 
67#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 */