2 * arch/arm/include/asm/kprobes.h
4 * Copyright (C) 2006, 2007 Motorola Inc.
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.
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.
16 #ifndef _ARM_KPROBES_H
17 #define _ARM_KPROBES_H
19 #include <asm-generic/kprobes.h>
22 #include <linux/types.h>
23 #include <linux/ptrace.h>
24 #include <linux/notifier.h>
26 #define __ARCH_WANT_KPROBES_INSN_SLOT
27 #define MAX_INSN_SIZE 2
29 #define flush_insn_slot(p) do { } while (0)
30 #define kretprobe_blacklist_size 0
32 typedef u32 kprobe_opcode_t;
34 #include <asm/probes.h>
36 #define arch_specific_insn arch_probes_insn
43 /* per-cpu kprobe control block */
44 struct kprobe_ctlblk {
45 unsigned int kprobe_status;
46 struct prev_kprobe prev_kprobe;
49 void arch_remove_kprobe(struct kprobe *);
50 int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
51 int kprobe_exceptions_notify(struct notifier_block *self,
52 unsigned long val, void *data);
54 /* optinsn template addresses */
55 extern __visible kprobe_opcode_t optprobe_template_entry;
56 extern __visible kprobe_opcode_t optprobe_template_val;
57 extern __visible kprobe_opcode_t optprobe_template_call;
58 extern __visible kprobe_opcode_t optprobe_template_end;
59 extern __visible kprobe_opcode_t optprobe_template_sub_sp;
60 extern __visible kprobe_opcode_t optprobe_template_add_sp;
61 extern __visible kprobe_opcode_t optprobe_template_restore_begin;
62 extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn;
63 extern __visible kprobe_opcode_t optprobe_template_restore_end;
65 #define MAX_OPTIMIZED_LENGTH 4
66 #define MAX_OPTINSN_SIZE \
67 ((unsigned long)&optprobe_template_end - \
68 (unsigned long)&optprobe_template_entry)
69 #define RELATIVEJUMP_SIZE 4
71 struct arch_optimized_insn {
73 * copy of the original instructions.
74 * Different from x86, ARM kprobe_opcode_t is u32.
76 #define MAX_COPIED_INSN DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
77 kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
78 /* detour code buffer */
79 kprobe_opcode_t *insn;
81 * We always copy one instruction on ARM,
82 * so size will always be 4, and unlike x86, there is no
83 * need for a size field.
87 #endif /* CONFIG_KPROBES */
88 #endif /* _ARM_KPROBES_H */