xref: /openbmc/linux/arch/arm/probes/decode-thumb.h (revision aaf9128a)
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 
32 enum 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 
65 enum 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 
89 extern const union decode_item probes_decode_thumb32_table[];
90 extern const union decode_item probes_decode_thumb16_table[];
91 
92 enum probes_insn __kprobes
93 thumb16_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[]);
96 enum probes_insn __kprobes
97 thumb32_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