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Commit | Line | Data |
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35aa1df4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/kprobes.h |
35aa1df4 QB |
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> | |
21254ebc | 21 | #include <linux/notifier.h> |
24ba613c | 22 | |
24ba613c AS |
23 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
24 | #define MAX_INSN_SIZE 2 | |
24ba613c | 25 | |
24ba613c AS |
26 | #define flush_insn_slot(p) do { } while (0) |
27 | #define kretprobe_blacklist_size 0 | |
35aa1df4 QB |
28 | |
29 | typedef u32 kprobe_opcode_t; | |
35aa1df4 | 30 | struct kprobe; |
b2531dd5 | 31 | #include <asm/probes.h> |
35aa1df4 | 32 | |
b4cd605c DL |
33 | #define arch_specific_insn arch_probes_insn |
34 | ||
24ba613c AS |
35 | struct prev_kprobe { |
36 | struct kprobe *kp; | |
37 | unsigned int status; | |
38 | }; | |
39 | ||
40 | /* per-cpu kprobe control block */ | |
41 | struct 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 | ||
48 | void arch_remove_kprobe(struct kprobe *); | |
24ba613c AS |
49 | int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); |
50 | int kprobe_exceptions_notify(struct notifier_block *self, | |
51 | unsigned long val, void *data); | |
52 | ||
0dc016db WN |
53 | /* optinsn template addresses */ |
54 | extern __visible kprobe_opcode_t optprobe_template_entry; | |
55 | extern __visible kprobe_opcode_t optprobe_template_val; | |
56 | extern __visible kprobe_opcode_t optprobe_template_call; | |
57 | extern __visible kprobe_opcode_t optprobe_template_end; | |
58 | extern __visible kprobe_opcode_t optprobe_template_sub_sp; | |
59 | extern __visible kprobe_opcode_t optprobe_template_add_sp; | |
bfc9657d WN |
60 | extern __visible kprobe_opcode_t optprobe_template_restore_begin; |
61 | extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn; | |
62 | extern __visible kprobe_opcode_t optprobe_template_restore_end; | |
0dc016db WN |
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 | ||
70 | struct 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 | }; | |
35aa1df4 QB |
85 | |
86 | #endif /* _ARM_KPROBES_H */ |