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35aa1df4 QB |
1 | /* |
2 | * include/asm-arm/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> | |
24ba613c AS |
21 | #include <linux/percpu.h> |
22 | ||
24ba613c AS |
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 | ||
79696910 NP |
27 | /* |
28 | * This undefined instruction must be unique and | |
29 | * reserved solely for kprobes' use. | |
30 | */ | |
31 | #define KPROBE_BREAKPOINT_INSTRUCTION 0xe7f001f8 | |
32 | ||
24ba613c AS |
33 | #define regs_return_value(regs) ((regs)->ARM_r0) |
34 | #define flush_insn_slot(p) do { } while (0) | |
35 | #define kretprobe_blacklist_size 0 | |
35aa1df4 QB |
36 | |
37 | typedef u32 kprobe_opcode_t; | |
38 | ||
39 | struct kprobe; | |
40 | typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *); | |
41 | ||
42 | /* Architecture specific copy of original instruction. */ | |
43 | struct arch_specific_insn { | |
44 | kprobe_opcode_t *insn; | |
45 | kprobe_insn_handler_t *insn_handler; | |
46 | }; | |
47 | ||
24ba613c AS |
48 | struct prev_kprobe { |
49 | struct kprobe *kp; | |
50 | unsigned int status; | |
51 | }; | |
52 | ||
53 | /* per-cpu kprobe control block */ | |
54 | struct 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 | ||
61 | void arch_remove_kprobe(struct kprobe *); | |
62 | ||
79696910 | 63 | int kprobe_trap_handler(struct pt_regs *regs, unsigned int instr); |
24ba613c AS |
64 | int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); |
65 | int kprobe_exceptions_notify(struct notifier_block *self, | |
66 | unsigned long val, void *data); | |
67 | ||
35aa1df4 QB |
68 | enum kprobe_insn { |
69 | INSN_REJECTED, | |
70 | INSN_GOOD, | |
71 | INSN_GOOD_NO_SLOT | |
72 | }; | |
73 | ||
74 | enum kprobe_insn arm_kprobe_decode_insn(kprobe_opcode_t, | |
75 | struct arch_specific_insn *); | |
76 | void __init arm_kprobe_decode_init(void); | |
77 | ||
78 | #endif /* _ARM_KPROBES_H */ |