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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 
28 typedef 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 
36 struct uprobe_xol_ops;
37 
38 struct 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 	};
57 };
58 
59 struct arch_uprobe_task {
60 #ifdef CONFIG_X86_64
61 	unsigned long			saved_scratch_register;
62 #endif
63 	unsigned int			saved_trap_nr;
64 	unsigned int			saved_tf;
65 };
66 
67 #endif	/* _ASM_UPROBES_H */
68