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