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