1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  Kernel Probes (KProbes)
4 *  include/asm-mips/kprobes.h
5 *
6 *  Copyright 2006 Sony Corp.
7 *  Copyright 2010 Cavium Networks
8 */
9
10#ifndef _ASM_KPROBES_H
11#define _ASM_KPROBES_H
12
13#include <asm-generic/kprobes.h>
14
15#ifdef CONFIG_KPROBES
16#include <linux/ptrace.h>
17#include <linux/types.h>
18
19#include <asm/cacheflush.h>
20#include <asm/kdebug.h>
21#include <asm/inst.h>
22
23#define	 __ARCH_WANT_KPROBES_INSN_SLOT
24
25struct kprobe;
26struct pt_regs;
27
28typedef union mips_instruction kprobe_opcode_t;
29
30#define MAX_INSN_SIZE 2
31
32#define flush_insn_slot(p)						\
33do {									\
34	if (p->addr)							\
35		flush_icache_range((unsigned long)p->addr,		\
36			   (unsigned long)p->addr +			\
37			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));	\
38} while (0)
39
40
41#define kretprobe_blacklist_size 0
42
43void arch_remove_kprobe(struct kprobe *p);
44int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
45
46/* Architecture specific copy of original instruction*/
47struct arch_specific_insn {
48	/* copy of the original instruction */
49	kprobe_opcode_t *insn;
50};
51
52struct prev_kprobe {
53	struct kprobe *kp;
54	unsigned long status;
55	unsigned long old_SR;
56	unsigned long saved_SR;
57	unsigned long saved_epc;
58};
59
60#define SKIP_DELAYSLOT 0x0001
61
62/* per-cpu kprobe control block */
63struct kprobe_ctlblk {
64	unsigned long kprobe_status;
65	unsigned long kprobe_old_SR;
66	unsigned long kprobe_saved_SR;
67	unsigned long kprobe_saved_epc;
68	/* Per-thread fields, used while emulating branches */
69	unsigned long flags;
70	unsigned long target_epc;
71	struct prev_kprobe prev_kprobe;
72};
73
74
75#endif /* CONFIG_KPROBES */
76#endif /* _ASM_KPROBES_H */
77