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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#ifdef __KERNEL__
4/*
5 * Kernel Probes (KProbes)
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>
31#include <linux/percpu.h>
32
33#define __ARCH_WANT_KPROBES_INSN_SLOT
34
35struct pt_regs;
36struct kprobe;
37
38typedef unsigned int kprobe_opcode_t;
39#define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */
40#define MAX_INSN_SIZE 1
41
42#define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008)
43#define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088)
44#define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000)
45#define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000)
46
47#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry)
48
49#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
50 IS_TWI(instr) || IS_TDI(instr))
51
52#define ARCH_SUPPORTS_KRETPROBES
53void kretprobe_trampoline(void);
54extern void arch_remove_kprobe(struct kprobe *p);
55
56/* Architecture specific copy of original instruction */
57struct arch_specific_insn {
58 /* copy of original instruction */
59 kprobe_opcode_t *insn;
60};
61
62struct prev_kprobe {
63 struct kprobe *kp;
64 unsigned long status;
65 unsigned long saved_msr;
66};
67
68/* per-cpu kprobe control block */
69struct kprobe_ctlblk {
70 unsigned long kprobe_status;
71 unsigned long kprobe_saved_msr;
72 struct pt_regs jprobe_saved_regs;
73 struct prev_kprobe prev_kprobe;
74};
75
76extern int kprobe_exceptions_notify(struct notifier_block *self,
77 unsigned long val, void *data);
78#endif /* __KERNEL__ */
79#endif /* _ASM_POWERPC_KPROBES_H */