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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_KPROBES_H
2#define _ASM_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 * include/asm-ppc64/kprobes.h
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
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
Keshavamurthy Anil Sdeac66a2005-09-06 15:19:35 -070045#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \
46 IS_TWI(instr) || IS_TDI(instr))
47
Rusty Lynch97f79432005-06-27 15:17:15 -070048#define ARCH_SUPPORTS_KRETPROBES
49void kretprobe_trampoline(void);
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051/* Architecture specific copy of original instruction */
52struct arch_specific_insn {
53 /* copy of original instruction */
Ananth N Mavinakayanahalli9ec4b1f2005-06-27 15:17:01 -070054 kprobe_opcode_t *insn;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055};
56
57#ifdef CONFIG_KPROBES
58extern int kprobe_exceptions_notify(struct notifier_block *self,
59 unsigned long val, void *data);
60#else /* !CONFIG_KPROBES */
61static inline int kprobe_exceptions_notify(struct notifier_block *self,
62 unsigned long val, void *data)
63{
64 return 0;
65}
66#endif
67#endif /* _ASM_KPROBES_H */