1/*
2 * Copyright (C) 2012 Rabin Vincent <rabin at rab.in>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef _ASM_UPROBES_H
10#define _ASM_UPROBES_H
11
12#include <asm/probes.h>
13#include <asm/opcodes.h>
14
15typedef u32 uprobe_opcode_t;
16
17#define MAX_UINSN_BYTES		4
18#define UPROBE_XOL_SLOT_BYTES	64
19
20#define UPROBE_SWBP_ARM_INSN	0xe7f001f9
21#define UPROBE_SS_ARM_INSN	0xe7f001fa
22#define UPROBE_SWBP_INSN	__opcode_to_mem_arm(UPROBE_SWBP_ARM_INSN)
23#define UPROBE_SWBP_INSN_SIZE	4
24
25struct arch_uprobe_task {
26	u32 backup;
27	unsigned long	saved_trap_no;
28};
29
30struct arch_uprobe {
31	u8 insn[MAX_UINSN_BYTES];
32	unsigned long ixol[2];
33	uprobe_opcode_t bpinsn;
34	bool simulate;
35	u32 pcreg;
36	void (*prehandler)(struct arch_uprobe *auprobe,
37			   struct arch_uprobe_task *autask,
38			   struct pt_regs *regs);
39	void (*posthandler)(struct arch_uprobe *auprobe,
40			    struct arch_uprobe_task *autask,
41			    struct pt_regs *regs);
42	struct arch_probes_insn asi;
43};
44
45#endif
46