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1 | #ifndef _ASM_POWERPC_KPROBES_H |
2 | #define _ASM_POWERPC_KPROBES_H | |
88ced031 | 3 | #ifdef __KERNEL__ |
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4 | /* |
5 | * Kernel Probes (KProbes) | |
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6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | * | |
21 | * Copyright (C) IBM Corporation, 2002, 2004 | |
22 | * | |
23 | * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel | |
24 | * Probes initial implementation ( includes suggestions from | |
25 | * Rusty Russell). | |
26 | * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli | |
27 | * <ananth@in.ibm.com> | |
28 | */ | |
29 | #include <linux/types.h> | |
30 | #include <linux/ptrace.h> | |
0dc036c9 | 31 | #include <linux/percpu.h> |
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32 | |
33 | struct pt_regs; | |
34 | ||
35 | typedef unsigned int kprobe_opcode_t; | |
36 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ | |
37 | #define MAX_INSN_SIZE 1 | |
38 | ||
39 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) | |
40 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) | |
41 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) | |
42 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) | |
43 | ||
44 | #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) | |
45 | ||
46 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ | |
47 | IS_TWI(instr) || IS_TDI(instr)) | |
48 | ||
49 | #define ARCH_SUPPORTS_KRETPROBES | |
50 | void kretprobe_trampoline(void); | |
51 | ||
52 | /* Architecture specific copy of original instruction */ | |
53 | struct arch_specific_insn { | |
54 | /* copy of original instruction */ | |
55 | kprobe_opcode_t *insn; | |
56 | }; | |
57 | ||
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58 | struct prev_kprobe { |
59 | struct kprobe *kp; | |
60 | unsigned long status; | |
61 | unsigned long saved_msr; | |
62 | }; | |
63 | ||
64 | /* per-cpu kprobe control block */ | |
65 | struct kprobe_ctlblk { | |
66 | unsigned long kprobe_status; | |
67 | unsigned long kprobe_saved_msr; | |
68 | struct pt_regs jprobe_saved_regs; | |
69 | struct prev_kprobe prev_kprobe; | |
70 | }; | |
71 | ||
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72 | #ifdef CONFIG_KPROBES |
73 | extern int kprobe_exceptions_notify(struct notifier_block *self, | |
74 | unsigned long val, void *data); | |
75 | #else /* !CONFIG_KPROBES */ | |
76 | static inline int kprobe_exceptions_notify(struct notifier_block *self, | |
77 | unsigned long val, void *data) | |
78 | { | |
79 | return 0; | |
80 | } | |
81 | #endif | |
88ced031 | 82 | #endif /* __KERNEL__ */ |
bbeb3f4c | 83 | #endif /* _ASM_POWERPC_KPROBES_H */ |