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Srikar Dronamraju2b144492012-02-09 14:56:42 +05301#ifndef _ASM_UPROBES_H
2#define _ASM_UPROBES_H
3/*
Ingo Molnar7b2d81d2012-02-17 09:27:41 +01004 * User-space Probes (UProbes) for x86
Srikar Dronamraju2b144492012-02-09 14:56:42 +05305 *
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
Srikar Dronamraju0326f5a2012-03-13 23:30:11 +053026#include <linux/notifier.h>
27
Srikar Dronamraju2b144492012-02-09 14:56:42 +053028typedef u8 uprobe_opcode_t;
Srikar Dronamraju2b144492012-02-09 14:56:42 +053029
Ingo Molnar7b2d81d2012-02-17 09:27:41 +010030#define MAX_UINSN_BYTES 16
Srikar Dronamraju900771a2012-03-12 14:55:14 +053031#define UPROBE_XOL_SLOT_BYTES 128 /* to keep it cache aligned */
Ingo Molnar7b2d81d2012-02-17 09:27:41 +010032
Srikar Dronamraju5cb4ac32012-03-12 14:55:45 +053033#define UPROBE_SWBP_INSN 0xcc
34#define UPROBE_SWBP_INSN_SIZE 1
Srikar Dronamraju2b144492012-02-09 14:56:42 +053035
Oleg Nesterov8ad8e9d2014-03-31 21:01:31 +020036struct uprobe_xol_ops;
37
Srikar Dronamraju3ff54ef2012-02-22 14:46:02 +053038struct arch_uprobe {
Oleg Nesterov8a8de662013-11-04 20:27:13 +010039 union {
40 u8 insn[MAX_UINSN_BYTES];
41 u8 ixol[MAX_UINSN_BYTES];
42 };
Oleg Nesterov8ad8e9d2014-03-31 21:01:31 +020043
Oleg Nesterov8ad8e9d2014-03-31 21:01:31 +020044 const struct uprobe_xol_ops *ops;
45
Oleg Nesterov7ba6db22014-04-05 20:05:02 +020046 union {
Oleg Nesterov7ba6db22014-04-05 20:05:02 +020047 struct {
48 s32 offs;
49 u8 ilen;
Oleg Nesterov8e89c0b2014-04-06 18:11:02 +020050 u8 opc1;
Oleg Nesterov97aa5cd2014-04-22 16:20:55 +020051 } branch;
52 struct {
Oleg Nesterov78d9af42014-04-24 18:52:37 +020053 u8 fixups;
Oleg Nesterov1dc76e62014-04-25 18:06:19 +020054 u8 ilen;
Oleg Nesterov5cdb76d2014-06-01 21:13:46 +020055 } defparam;
Oleg Nesterov7ba6db22014-04-05 20:05:02 +020056 };
Srikar Dronamraju2b144492012-02-09 14:56:42 +053057};
58
Srikar Dronamraju0326f5a2012-03-13 23:30:11 +053059struct arch_uprobe_task {
Srikar Dronamraju0326f5a2012-03-13 23:30:11 +053060#ifdef CONFIG_X86_64
61 unsigned long saved_scratch_register;
62#endif
Oleg Nesterovbaedbf02012-09-03 17:02:16 +020063 unsigned int saved_trap_nr;
Oleg Nesterov3a4664a2012-09-03 16:05:10 +020064 unsigned int saved_tf;
Srikar Dronamraju0326f5a2012-03-13 23:30:11 +053065};
66
Srikar Dronamraju2b144492012-02-09 14:56:42 +053067#endif /* _ASM_UPROBES_H */