summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/asm/uprobes.h
blob: cee58624cb30aa06f556c0c9fd381e4b0a271cb4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
#ifndef _ASM_UPROBES_H
#define _ASM_UPROBES_H
/*
 * User-space Probes (UProbes) for x86
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright (C) IBM Corporation, 2008-2011
 * Authors:
 *	Srikar Dronamraju
 *	Jim Keniston
 */

#include <linux/notifier.h>

typedef u8 uprobe_opcode_t;

#define MAX_UINSN_BYTES			  16
#define UPROBE_XOL_SLOT_BYTES		 128	/* to keep it cache aligned */

#define UPROBE_SWBP_INSN		0xcc
#define UPROBE_SWBP_INSN_SIZE		   1

struct arch_uprobe {
	u16				fixups;
	u8				insn[MAX_UINSN_BYTES];
#ifdef CONFIG_X86_64
	unsigned long			rip_rela_target_address;
#endif
};

struct arch_uprobe_task {
	unsigned long			saved_trap_nr;
#ifdef CONFIG_X86_64
	unsigned long			saved_scratch_register;
#endif
#define UPROBE_CLEAR_TF			(1 << 0)
	unsigned int			restore_flags;
};

extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
#endif	/* _ASM_UPROBES_H */