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
12 typedef 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
22 struct arch_uprobe_task {
23 u32 backup;
24 unsigned long saved_trap_no;
25 };
26
27 struct 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
43
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