1/*
2 * arch/arm/probes/decode-thumb.h
3 *
4 * Copyright 2013 Linaro Ltd.
5 * Written by: David A. Long
6 *
7 * The code contained herein is licensed under the GNU General Public
8 * License. You may obtain a copy of the GNU General Public License
9 * Version 2 or later at the following locations:
10 *
11 * http://www.opensource.org/licenses/gpl-license.html
12 * http://www.gnu.org/copyleft/gpl.html
13 */
14
15#ifndef _ARM_KERNEL_PROBES_THUMB_H
16#define  _ARM_KERNEL_PROBES_THUMB_H
17
18#include "decode.h"
19
20/*
21 * True if current instruction is in an IT block.
22 */
23#define in_it_block(cpsr)	((cpsr & 0x06000c00) != 0x00000000)
24
25/*
26 * Return the condition code to check for the currently executing instruction.
27 * This is in ITSTATE<7:4> which is in CPSR<15:12> but is only valid if
28 * in_it_block returns true.
29 */
30#define current_cond(cpsr)	((cpsr >> 12) & 0xf)
31
32enum probes_t32_action {
33	PROBES_T32_EMULATE_NONE,
34	PROBES_T32_SIMULATE_NOP,
35	PROBES_T32_LDMSTM,
36	PROBES_T32_LDRDSTRD,
37	PROBES_T32_TABLE_BRANCH,
38	PROBES_T32_TST,
39	PROBES_T32_CMP,
40	PROBES_T32_MOV,
41	PROBES_T32_ADDSUB,
42	PROBES_T32_LOGICAL,
43	PROBES_T32_ADDWSUBW_PC,
44	PROBES_T32_ADDWSUBW,
45	PROBES_T32_MOVW,
46	PROBES_T32_SAT,
47	PROBES_T32_BITFIELD,
48	PROBES_T32_SEV,
49	PROBES_T32_WFE,
50	PROBES_T32_MRS,
51	PROBES_T32_BRANCH_COND,
52	PROBES_T32_BRANCH,
53	PROBES_T32_PLDI,
54	PROBES_T32_LDR_LIT,
55	PROBES_T32_LDRSTR,
56	PROBES_T32_SIGN_EXTEND,
57	PROBES_T32_MEDIA,
58	PROBES_T32_REVERSE,
59	PROBES_T32_MUL_ADD,
60	PROBES_T32_MUL_ADD2,
61	PROBES_T32_MUL_ADD_LONG,
62	NUM_PROBES_T32_ACTIONS
63};
64
65enum probes_t16_action {
66	PROBES_T16_ADD_SP,
67	PROBES_T16_CBZ,
68	PROBES_T16_SIGN_EXTEND,
69	PROBES_T16_PUSH,
70	PROBES_T16_POP,
71	PROBES_T16_SEV,
72	PROBES_T16_WFE,
73	PROBES_T16_IT,
74	PROBES_T16_CMP,
75	PROBES_T16_ADDSUB,
76	PROBES_T16_LOGICAL,
77	PROBES_T16_BLX,
78	PROBES_T16_HIREGOPS,
79	PROBES_T16_LDR_LIT,
80	PROBES_T16_LDRHSTRH,
81	PROBES_T16_LDRSTR,
82	PROBES_T16_ADR,
83	PROBES_T16_LDMSTM,
84	PROBES_T16_BRANCH_COND,
85	PROBES_T16_BRANCH,
86	NUM_PROBES_T16_ACTIONS
87};
88
89extern const union decode_item probes_decode_thumb32_table[];
90extern const union decode_item probes_decode_thumb16_table[];
91
92enum probes_insn __kprobes
93thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
94		bool emulate, const union decode_action *actions,
95		const struct decode_checker *checkers[]);
96enum probes_insn __kprobes
97thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
98		bool emulate, const union decode_action *actions,
99		const struct decode_checker *checkers[]);
100
101#endif
102