1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _ASM_KPROBES_H
3#define _ASM_KPROBES_H
4/*
5 *  Kernel Probes (KProbes)
6 *
7 * Copyright (C) IBM Corporation, 2002, 2004
8 * Copyright (C) Intel Corporation, 2005
9 *
10 * 2005-Apr     Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
11 *              <anil.s.keshavamurthy@intel.com> adapted from i386
12 */
13#include <asm-generic/kprobes.h>
14#include <asm/break.h>
15
16#define BREAK_INST	(long)(__IA64_BREAK_KPROBE << 6)
17
18#ifdef CONFIG_KPROBES
19
20#include <linux/types.h>
21#include <linux/ptrace.h>
22#include <linux/percpu.h>
23
24#define __ARCH_WANT_KPROBES_INSN_SLOT
25#define MAX_INSN_SIZE   2	/* last half is for kprobe-booster */
26#define NOP_M_INST	(long)(1<<27)
27#define BRL_INST(i1, i2) ((long)((0xcL << 37) |	/* brl */ \
28				(0x1L << 12) |	/* many */ \
29				(((i1) & 1) << 36) | ((i2) << 13))) /* imm */
30
31typedef union cmp_inst {
32	struct {
33	unsigned long long qp : 6;
34	unsigned long long p1 : 6;
35	unsigned long long c  : 1;
36	unsigned long long r2 : 7;
37	unsigned long long r3 : 7;
38	unsigned long long p2 : 6;
39	unsigned long long ta : 1;
40	unsigned long long x2 : 2;
41	unsigned long long tb : 1;
42	unsigned long long opcode : 4;
43	unsigned long long reserved : 23;
44	}f;
45	unsigned long long l;
46} cmp_inst_t;
47
48struct kprobe;
49
50typedef struct _bundle {
51	struct {
52		unsigned long long template : 5;
53		unsigned long long slot0 : 41;
54		unsigned long long slot1_p0 : 64-46;
55	} quad0;
56	struct {
57		unsigned long long slot1_p1 : 41 - (64-46);
58		unsigned long long slot2 : 41;
59	} quad1;
60} __attribute__((__aligned__(16)))  bundle_t;
61
62struct prev_kprobe {
63	struct kprobe *kp;
64	unsigned long status;
65};
66
67#define	MAX_PARAM_RSE_SIZE	(0x60+0x60/0x3f)
68/* per-cpu kprobe control block */
69#define ARCH_PREV_KPROBE_SZ 2
70struct kprobe_ctlblk {
71	unsigned long kprobe_status;
72	unsigned long *bsp;
73	unsigned long cfm;
74	atomic_t prev_kprobe_index;
75	struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
76};
77
78#define kretprobe_blacklist_size 0
79
80#define SLOT0_OPCODE_SHIFT	(37)
81#define SLOT1_p1_OPCODE_SHIFT	(37 - (64-46))
82#define SLOT2_OPCODE_SHIFT 	(37)
83
84#define INDIRECT_CALL_OPCODE		(1)
85#define IP_RELATIVE_CALL_OPCODE		(5)
86#define IP_RELATIVE_BRANCH_OPCODE	(4)
87#define IP_RELATIVE_PREDICT_OPCODE	(7)
88#define LONG_BRANCH_OPCODE		(0xC)
89#define LONG_CALL_OPCODE		(0xD)
90#define flush_insn_slot(p)		do { } while (0)
91
92typedef struct kprobe_opcode {
93	bundle_t bundle;
94} kprobe_opcode_t;
95
96/* Architecture specific copy of original instruction*/
97struct arch_specific_insn {
98	/* copy of the instruction to be emulated */
99	kprobe_opcode_t *insn;
100 #define INST_FLAG_FIX_RELATIVE_IP_ADDR		1
101 #define INST_FLAG_FIX_BRANCH_REG		2
102 #define INST_FLAG_BREAK_INST			4
103 #define INST_FLAG_BOOSTABLE			8
104 	unsigned long inst_flag;
105 	unsigned short target_br_reg;
106	unsigned short slot;
107};
108
109extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
110extern int kprobe_exceptions_notify(struct notifier_block *self,
111				    unsigned long val, void *data);
112
113extern void arch_remove_kprobe(struct kprobe *p);
114
115#endif /* CONFIG_KPROBES */
116#endif /* _ASM_KPROBES_H */
117