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
26 enum 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
59 enum 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
83 extern const union decode_item probes_decode_thumb32_table[];
84 extern const union decode_item probes_decode_thumb16_table[];
85
86 enum probes_insn __kprobes
87 thumb16_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[]);
90 enum probes_insn __kprobes
91 thumb32_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
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