1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2012 Rabin Vincent <rabin at rab.in>
 4 */
 5
 6#ifndef _ASM_UPROBES_H
 7#define _ASM_UPROBES_H
 8
 9#include <asm/probes.h>
10#include <asm/opcodes.h>
11
12typedef u32 uprobe_opcode_t;
13
14#define MAX_UINSN_BYTES		4
15#define UPROBE_XOL_SLOT_BYTES	64
16
17#define UPROBE_SWBP_ARM_INSN	0xe7f001f9
18#define UPROBE_SS_ARM_INSN	0xe7f001fa
19#define UPROBE_SWBP_INSN	__opcode_to_mem_arm(UPROBE_SWBP_ARM_INSN)
20#define UPROBE_SWBP_INSN_SIZE	4
21
22struct arch_uprobe_task {
23	u32 backup;
24	unsigned long	saved_trap_no;
25};
26
27struct arch_uprobe {
28	u8 insn[MAX_UINSN_BYTES];
29	unsigned long ixol[2];
30	uprobe_opcode_t bpinsn;
31	bool simulate;
32	u32 pcreg;
33	void (*prehandler)(struct arch_uprobe *auprobe,
34			   struct arch_uprobe_task *autask,
35			   struct pt_regs *regs);
36	void (*posthandler)(struct arch_uprobe *auprobe,
37			    struct arch_uprobe_task *autask,
38			    struct pt_regs *regs);
39	struct arch_probes_insn asi;
40};
41
42#endif