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