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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
bbeb3f4c SR |
2 | #ifndef _ASM_POWERPC_KPROBES_H |
3 | #define _ASM_POWERPC_KPROBES_H | |
7d134b2c LR |
4 | |
5 | #include <asm-generic/kprobes.h> | |
6 | ||
88ced031 | 7 | #ifdef __KERNEL__ |
14cf11af PM |
8 | /* |
9 | * Kernel Probes (KProbes) | |
14cf11af | 10 | * |
14cf11af PM |
11 | * Copyright (C) IBM Corporation, 2002, 2004 |
12 | * | |
13 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
14 | * Probes initial implementation ( includes suggestions from | |
15 | * Rusty Russell). | |
16 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
17 | * <ananth@in.ibm.com> | |
18 | */ | |
19 | #include <linux/types.h> | |
20 | #include <linux/ptrace.h> | |
0dc036c9 | 21 | #include <linux/percpu.h> |
30176466 | 22 | #include <linux/module.h> |
7118e7e6 | 23 | #include <asm/probes.h> |
47f86b4e | 24 | #include <asm/code-patching.h> |
14cf11af | 25 | |
6cc89bad | 26 | #ifdef CONFIG_KPROBES |
2d14e39d AK |
27 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
28 | ||
14cf11af | 29 | struct pt_regs; |
0498b635 | 30 | struct kprobe; |
14cf11af | 31 | |
28e1e58f | 32 | typedef ppc_opcode_t kprobe_opcode_t; |
51c9c084 A |
33 | |
34 | extern kprobe_opcode_t optinsn_slot; | |
35 | ||
36 | /* Optinsn template address */ | |
37 | extern kprobe_opcode_t optprobe_template_entry[]; | |
38 | extern kprobe_opcode_t optprobe_template_op_address[]; | |
39 | extern kprobe_opcode_t optprobe_template_call_handler[]; | |
40 | extern kprobe_opcode_t optprobe_template_insn[]; | |
41 | extern kprobe_opcode_t optprobe_template_call_emulate[]; | |
42 | extern kprobe_opcode_t optprobe_template_ret[]; | |
43 | extern kprobe_opcode_t optprobe_template_end[]; | |
44 | ||
45 | /* Fixed instruction size for powerpc */ | |
46 | #define MAX_INSN_SIZE 1 | |
47 | #define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */ | |
48 | #define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry) | |
49 | #define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */ | |
14cf11af | 50 | |
a9ad965e | 51 | #define flush_insn_slot(p) do { } while (0) |
f438d914 | 52 | #define kretprobe_blacklist_size 0 |
e6f47f97 | 53 | |
14cf11af | 54 | void kretprobe_trampoline(void); |
0498b635 | 55 | extern void arch_remove_kprobe(struct kprobe *p); |
14cf11af PM |
56 | |
57 | /* Architecture specific copy of original instruction */ | |
58 | struct arch_specific_insn { | |
59 | /* copy of original instruction */ | |
60 | kprobe_opcode_t *insn; | |
e6349a95 AM |
61 | /* |
62 | * Set in kprobes code, initially to 0. If the instruction can be | |
63 | * eumulated, this is set to 1, if not, to -1. | |
64 | */ | |
65 | int boostable; | |
14cf11af PM |
66 | }; |
67 | ||
0dc036c9 AM |
68 | struct prev_kprobe { |
69 | struct kprobe *kp; | |
70 | unsigned long status; | |
71 | unsigned long saved_msr; | |
72 | }; | |
73 | ||
74 | /* per-cpu kprobe control block */ | |
75 | struct kprobe_ctlblk { | |
76 | unsigned long kprobe_status; | |
77 | unsigned long kprobe_saved_msr; | |
0dc036c9 AM |
78 | struct prev_kprobe prev_kprobe; |
79 | }; | |
80 | ||
51c9c084 A |
81 | struct arch_optimized_insn { |
82 | kprobe_opcode_t copied_insn[1]; | |
83 | /* detour buffer */ | |
84 | kprobe_opcode_t *insn; | |
85 | }; | |
86 | ||
14cf11af | 87 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
41dead49 | 88 | unsigned long val, void *data); |
9f90b997 | 89 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
6cc89bad NR |
90 | extern int kprobe_handler(struct pt_regs *regs); |
91 | extern int kprobe_post_handler(struct pt_regs *regs); | |
92 | #else | |
93 | static inline int kprobe_handler(struct pt_regs *regs) { return 0; } | |
94 | static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; } | |
95 | #endif /* CONFIG_KPROBES */ | |
88ced031 | 96 | #endif /* __KERNEL__ */ |
bbeb3f4c | 97 | #endif /* _ASM_POWERPC_KPROBES_H */ |