1#ifndef _ASM_UPROBES_H
2#define _ASM_UPROBES_H
3/*
4 * User-space Probes (UProbes) for x86
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, 2008-2011
21 * Authors:
22 * Srikar Dronamraju
23 * Jim Keniston
24 */
25
26#include <linux/notifier.h>
27
28typedef u8 uprobe_opcode_t;
29
30#define MAX_UINSN_BYTES 16
31#define UPROBE_XOL_SLOT_BYTES 128 /* to keep it cache aligned */
32
33#define UPROBE_SWBP_INSN 0xcc
34#define UPROBE_SWBP_INSN_SIZE 1
35
36struct uprobe_xol_ops;
37
38struct arch_uprobe {
39 union {
40 u8 insn[MAX_UINSN_BYTES];
41 u8 ixol[MAX_UINSN_BYTES];
42 };
43
44 const struct uprobe_xol_ops *ops;
45
46 union {
47 struct {
48 s32 offs;
49 u8 ilen;
50 u8 opc1;
51 } branch;
52 struct {
53 u8 fixups;
54 u8 ilen;
55 } defparam;
56 struct {
57 u8 reg_offset; /* to the start of pt_regs */
58 u8 ilen;
59 } push;
60 };
61};
62
63struct arch_uprobe_task {
64#ifdef CONFIG_X86_64
65 unsigned long saved_scratch_register;
66#endif
67 unsigned int saved_trap_nr;
68 unsigned int saved_tf;
69};
70
71#endif /* _ASM_UPROBES_H */
72