1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * arch/arm/probes/decode-thumb.h
4 *
5 * Copyright 2013 Linaro Ltd.
6 * Written by: David A. Long
7 */
8
9#ifndef _ARM_KERNEL_PROBES_THUMB_H
10#define  _ARM_KERNEL_PROBES_THUMB_H
11
12#include "decode.h"
13
14/*
15 * True if current instruction is in an IT block.
16 */
17#define in_it_block(cpsr)	((cpsr & 0x06000c00) != 0x00000000)
18
19/*
20 * Return the condition code to check for the currently executing instruction.
21 * This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
22 * in_it_block returns true.
23 */
24#define current_cond(cpsr)	((cpsr >> 12) & 0xf)
25
26enum probes_t32_action {
27	PROBES_T32_EMULATE_NONE,
28	PROBES_T32_SIMULATE_NOP,
29	PROBES_T32_LDMSTM,
30	PROBES_T32_LDRDSTRD,
31	PROBES_T32_TABLE_BRANCH,
32	PROBES_T32_TST,
33	PROBES_T32_CMP,
34	PROBES_T32_MOV,
35	PROBES_T32_ADDSUB,
36	PROBES_T32_LOGICAL,
37	PROBES_T32_ADDWSUBW_PC,
38	PROBES_T32_ADDWSUBW,
39	PROBES_T32_MOVW,
40	PROBES_T32_SAT,
41	PROBES_T32_BITFIELD,
42	PROBES_T32_SEV,
43	PROBES_T32_WFE,
44	PROBES_T32_MRS,
45	PROBES_T32_BRANCH_COND,
46	PROBES_T32_BRANCH,
47	PROBES_T32_PLDI,
48	PROBES_T32_LDR_LIT,
49	PROBES_T32_LDRSTR,
50	PROBES_T32_SIGN_EXTEND,
51	PROBES_T32_MEDIA,
52	PROBES_T32_REVERSE,
53	PROBES_T32_MUL_ADD,
54	PROBES_T32_MUL_ADD2,
55	PROBES_T32_MUL_ADD_LONG,
56	NUM_PROBES_T32_ACTIONS
57};
58
59enum probes_t16_action {
60	PROBES_T16_ADD_SP,
61	PROBES_T16_CBZ,
62	PROBES_T16_SIGN_EXTEND,
63	PROBES_T16_PUSH,
64	PROBES_T16_POP,
65	PROBES_T16_SEV,
66	PROBES_T16_WFE,
67	PROBES_T16_IT,
68	PROBES_T16_CMP,
69	PROBES_T16_ADDSUB,
70	PROBES_T16_LOGICAL,
71	PROBES_T16_BLX,
72	PROBES_T16_HIREGOPS,
73	PROBES_T16_LDR_LIT,
74	PROBES_T16_LDRHSTRH,
75	PROBES_T16_LDRSTR,
76	PROBES_T16_ADR,
77	PROBES_T16_LDMSTM,
78	PROBES_T16_BRANCH_COND,
79	PROBES_T16_BRANCH,
80	NUM_PROBES_T16_ACTIONS
81};
82
83extern const union decode_item probes_decode_thumb32_table[];
84extern const union decode_item probes_decode_thumb16_table[];
85
86enum probes_insn __kprobes
87thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
88		bool emulate, const union decode_action *actions,
89		const struct decode_checker *checkers[]);
90enum probes_insn __kprobes
91thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
92		bool emulate, const union decode_action *actions,
93		const struct decode_checker *checkers[]);
94
95#endif
96