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bbeb3f4c SR |
1 | #ifndef _ASM_POWERPC_KPROBES_H |
2 | #define _ASM_POWERPC_KPROBES_H | |
7d134b2c LR |
3 | |
4 | #include <asm-generic/kprobes.h> | |
5 | ||
88ced031 | 6 | #ifdef __KERNEL__ |
14cf11af PM |
7 | /* |
8 | * Kernel Probes (KProbes) | |
14cf11af PM |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | * Copyright (C) IBM Corporation, 2002, 2004 | |
25 | * | |
26 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
27 | * Probes initial implementation ( includes suggestions from | |
28 | * Rusty Russell). | |
29 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
30 | * <ananth@in.ibm.com> | |
31 | */ | |
32 | #include <linux/types.h> | |
33 | #include <linux/ptrace.h> | |
0dc036c9 | 34 | #include <linux/percpu.h> |
30176466 | 35 | #include <linux/module.h> |
7118e7e6 | 36 | #include <asm/probes.h> |
47f86b4e | 37 | #include <asm/code-patching.h> |
14cf11af | 38 | |
6cc89bad | 39 | #ifdef CONFIG_KPROBES |
2d14e39d AK |
40 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
41 | ||
14cf11af | 42 | struct pt_regs; |
0498b635 | 43 | struct kprobe; |
14cf11af | 44 | |
28e1e58f | 45 | typedef ppc_opcode_t kprobe_opcode_t; |
51c9c084 A |
46 | |
47 | extern kprobe_opcode_t optinsn_slot; | |
48 | ||
49 | /* Optinsn template address */ | |
50 | extern kprobe_opcode_t optprobe_template_entry[]; | |
51 | extern kprobe_opcode_t optprobe_template_op_address[]; | |
52 | extern kprobe_opcode_t optprobe_template_call_handler[]; | |
53 | extern kprobe_opcode_t optprobe_template_insn[]; | |
54 | extern kprobe_opcode_t optprobe_template_call_emulate[]; | |
55 | extern kprobe_opcode_t optprobe_template_ret[]; | |
56 | extern kprobe_opcode_t optprobe_template_end[]; | |
57 | ||
58 | /* Fixed instruction size for powerpc */ | |
59 | #define MAX_INSN_SIZE 1 | |
60 | #define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */ | |
61 | #define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry) | |
62 | #define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */ | |
14cf11af | 63 | |
a9ad965e | 64 | #define flush_insn_slot(p) do { } while (0) |
f438d914 | 65 | #define kretprobe_blacklist_size 0 |
e6f47f97 | 66 | |
14cf11af | 67 | void kretprobe_trampoline(void); |
0498b635 | 68 | extern void arch_remove_kprobe(struct kprobe *p); |
14cf11af PM |
69 | |
70 | /* Architecture specific copy of original instruction */ | |
71 | struct arch_specific_insn { | |
72 | /* copy of original instruction */ | |
73 | kprobe_opcode_t *insn; | |
e6349a95 AM |
74 | /* |
75 | * Set in kprobes code, initially to 0. If the instruction can be | |
76 | * eumulated, this is set to 1, if not, to -1. | |
77 | */ | |
78 | int boostable; | |
14cf11af PM |
79 | }; |
80 | ||
0dc036c9 AM |
81 | struct prev_kprobe { |
82 | struct kprobe *kp; | |
83 | unsigned long status; | |
84 | unsigned long saved_msr; | |
85 | }; | |
86 | ||
87 | /* per-cpu kprobe control block */ | |
88 | struct kprobe_ctlblk { | |
89 | unsigned long kprobe_status; | |
90 | unsigned long kprobe_saved_msr; | |
0dc036c9 AM |
91 | struct prev_kprobe prev_kprobe; |
92 | }; | |
93 | ||
51c9c084 A |
94 | struct arch_optimized_insn { |
95 | kprobe_opcode_t copied_insn[1]; | |
96 | /* detour buffer */ | |
97 | kprobe_opcode_t *insn; | |
98 | }; | |
99 | ||
14cf11af | 100 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
41dead49 | 101 | unsigned long val, void *data); |
9f90b997 | 102 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
6cc89bad NR |
103 | extern int kprobe_handler(struct pt_regs *regs); |
104 | extern int kprobe_post_handler(struct pt_regs *regs); | |
105 | #else | |
106 | static inline int kprobe_handler(struct pt_regs *regs) { return 0; } | |
107 | static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; } | |
108 | #endif /* CONFIG_KPROBES */ | |
88ced031 | 109 | #endif /* __KERNEL__ */ |
bbeb3f4c | 110 | #endif /* _ASM_POWERPC_KPROBES_H */ |