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192.168.1.100 / T103 / a73df7f0aa0d100182982119cb307063e84c20aa / . / src / kernel / linux / v4.14 / arch / arm / probes / decode-thumb.c
blob: 985e7dd4cac6b7dfbe80703a425f1cf5c1d26995 [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +0800[diff] [blame]1/*
2 * arch/arm/probes/decode-thumb.c
3 *
4 * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/stddef.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14
15#include "decode.h"
16#include "decode-thumb.h"
17
18
19static const union decode_item t32_table_1110_100x_x0xx[] = {
20 /* Load/store multiple instructions */
21
22 /* Rn is PC 1110 100x x0xx 1111 xxxx xxxx xxxx xxxx */
23 DECODE_REJECT (0xfe4f0000, 0xe80f0000),
24
25 /* SRS 1110 1000 00x0 xxxx xxxx xxxx xxxx xxxx */
26 /* RFE 1110 1000 00x1 xxxx xxxx xxxx xxxx xxxx */
27 DECODE_REJECT (0xffc00000, 0xe8000000),
28 /* SRS 1110 1001 10x0 xxxx xxxx xxxx xxxx xxxx */
29 /* RFE 1110 1001 10x1 xxxx xxxx xxxx xxxx xxxx */
30 DECODE_REJECT (0xffc00000, 0xe9800000),
31
32 /* STM Rn, {...pc} 1110 100x x0x0 xxxx 1xxx xxxx xxxx xxxx */
33 DECODE_REJECT (0xfe508000, 0xe8008000),
34 /* LDM Rn, {...lr,pc} 1110 100x x0x1 xxxx 11xx xxxx xxxx xxxx */
35 DECODE_REJECT (0xfe50c000, 0xe810c000),
36 /* LDM/STM Rn, {...sp} 1110 100x x0xx xxxx xx1x xxxx xxxx xxxx */
37 DECODE_REJECT (0xfe402000, 0xe8002000),
38
39 /* STMIA 1110 1000 10x0 xxxx xxxx xxxx xxxx xxxx */
40 /* LDMIA 1110 1000 10x1 xxxx xxxx xxxx xxxx xxxx */
41 /* STMDB 1110 1001 00x0 xxxx xxxx xxxx xxxx xxxx */
42 /* LDMDB 1110 1001 00x1 xxxx xxxx xxxx xxxx xxxx */
43 DECODE_CUSTOM (0xfe400000, 0xe8000000, PROBES_T32_LDMSTM),
44
45 DECODE_END
46};
47
48static const union decode_item t32_table_1110_100x_x1xx[] = {
49 /* Load/store dual, load/store exclusive, table branch */
50
51 /* STRD (immediate) 1110 1000 x110 xxxx xxxx xxxx xxxx xxxx */
52 /* LDRD (immediate) 1110 1000 x111 xxxx xxxx xxxx xxxx xxxx */
53 DECODE_OR (0xff600000, 0xe8600000),
54 /* STRD (immediate) 1110 1001 x1x0 xxxx xxxx xxxx xxxx xxxx */
55 /* LDRD (immediate) 1110 1001 x1x1 xxxx xxxx xxxx xxxx xxxx */
56 DECODE_EMULATEX (0xff400000, 0xe9400000, PROBES_T32_LDRDSTRD,
57 REGS(NOPCWB, NOSPPC, NOSPPC, 0, 0)),
58
59 /* TBB 1110 1000 1101 xxxx xxxx xxxx 0000 xxxx */
60 /* TBH 1110 1000 1101 xxxx xxxx xxxx 0001 xxxx */
61 DECODE_SIMULATEX(0xfff000e0, 0xe8d00000, PROBES_T32_TABLE_BRANCH,
62 REGS(NOSP, 0, 0, 0, NOSPPC)),
63
64 /* STREX 1110 1000 0100 xxxx xxxx xxxx xxxx xxxx */
65 /* LDREX 1110 1000 0101 xxxx xxxx xxxx xxxx xxxx */
66 /* STREXB 1110 1000 1100 xxxx xxxx xxxx 0100 xxxx */
67 /* STREXH 1110 1000 1100 xxxx xxxx xxxx 0101 xxxx */
68 /* STREXD 1110 1000 1100 xxxx xxxx xxxx 0111 xxxx */
69 /* LDREXB 1110 1000 1101 xxxx xxxx xxxx 0100 xxxx */
70 /* LDREXH 1110 1000 1101 xxxx xxxx xxxx 0101 xxxx */
71 /* LDREXD 1110 1000 1101 xxxx xxxx xxxx 0111 xxxx */
72 /* And unallocated instructions... */
73 DECODE_END
74};
75
76static const union decode_item t32_table_1110_101x[] = {
77 /* Data-processing (shifted register) */
78
79 /* TST 1110 1010 0001 xxxx xxxx 1111 xxxx xxxx */
80 /* TEQ 1110 1010 1001 xxxx xxxx 1111 xxxx xxxx */
81 DECODE_EMULATEX (0xff700f00, 0xea100f00, PROBES_T32_TST,
82 REGS(NOSPPC, 0, 0, 0, NOSPPC)),
83
84 /* CMN 1110 1011 0001 xxxx xxxx 1111 xxxx xxxx */
85 DECODE_OR (0xfff00f00, 0xeb100f00),
86 /* CMP 1110 1011 1011 xxxx xxxx 1111 xxxx xxxx */
87 DECODE_EMULATEX (0xfff00f00, 0xebb00f00, PROBES_T32_TST,
88 REGS(NOPC, 0, 0, 0, NOSPPC)),
89
90 /* MOV 1110 1010 010x 1111 xxxx xxxx xxxx xxxx */
91 /* MVN 1110 1010 011x 1111 xxxx xxxx xxxx xxxx */
92 DECODE_EMULATEX (0xffcf0000, 0xea4f0000, PROBES_T32_MOV,
93 REGS(0, 0, NOSPPC, 0, NOSPPC)),
94
95 /* ??? 1110 1010 101x xxxx xxxx xxxx xxxx xxxx */
96 /* ??? 1110 1010 111x xxxx xxxx xxxx xxxx xxxx */
97 DECODE_REJECT (0xffa00000, 0xeaa00000),
98 /* ??? 1110 1011 001x xxxx xxxx xxxx xxxx xxxx */
99 DECODE_REJECT (0xffe00000, 0xeb200000),
100 /* ??? 1110 1011 100x xxxx xxxx xxxx xxxx xxxx */
101 DECODE_REJECT (0xffe00000, 0xeb800000),
102 /* ??? 1110 1011 111x xxxx xxxx xxxx xxxx xxxx */
103 DECODE_REJECT (0xffe00000, 0xebe00000),
104
105 /* ADD/SUB SP, SP, Rm, LSL #0..3 */
106 /* 1110 1011 x0xx 1101 x000 1101 xx00 xxxx */
107 DECODE_EMULATEX (0xff4f7f30, 0xeb0d0d00, PROBES_T32_ADDSUB,
108 REGS(SP, 0, SP, 0, NOSPPC)),
109
110 /* ADD/SUB SP, SP, Rm, shift */
111 /* 1110 1011 x0xx 1101 xxxx 1101 xxxx xxxx */
112 DECODE_REJECT (0xff4f0f00, 0xeb0d0d00),
113
114 /* ADD/SUB Rd, SP, Rm, shift */
115 /* 1110 1011 x0xx 1101 xxxx xxxx xxxx xxxx */
116 DECODE_EMULATEX (0xff4f0000, 0xeb0d0000, PROBES_T32_ADDSUB,
117 REGS(SP, 0, NOPC, 0, NOSPPC)),
118
119 /* AND 1110 1010 000x xxxx xxxx xxxx xxxx xxxx */
120 /* BIC 1110 1010 001x xxxx xxxx xxxx xxxx xxxx */
121 /* ORR 1110 1010 010x xxxx xxxx xxxx xxxx xxxx */
122 /* ORN 1110 1010 011x xxxx xxxx xxxx xxxx xxxx */
123 /* EOR 1110 1010 100x xxxx xxxx xxxx xxxx xxxx */
124 /* PKH 1110 1010 110x xxxx xxxx xxxx xxxx xxxx */
125 /* ADD 1110 1011 000x xxxx xxxx xxxx xxxx xxxx */
126 /* ADC 1110 1011 010x xxxx xxxx xxxx xxxx xxxx */
127 /* SBC 1110 1011 011x xxxx xxxx xxxx xxxx xxxx */
128 /* SUB 1110 1011 101x xxxx xxxx xxxx xxxx xxxx */
129 /* RSB 1110 1011 110x xxxx xxxx xxxx xxxx xxxx */
130 DECODE_EMULATEX (0xfe000000, 0xea000000, PROBES_T32_LOGICAL,
131 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
132
133 DECODE_END
134};
135
136static const union decode_item t32_table_1111_0x0x___0[] = {
137 /* Data-processing (modified immediate) */
138
139 /* TST 1111 0x00 0001 xxxx 0xxx 1111 xxxx xxxx */
140 /* TEQ 1111 0x00 1001 xxxx 0xxx 1111 xxxx xxxx */
141 DECODE_EMULATEX (0xfb708f00, 0xf0100f00, PROBES_T32_TST,
142 REGS(NOSPPC, 0, 0, 0, 0)),
143
144 /* CMN 1111 0x01 0001 xxxx 0xxx 1111 xxxx xxxx */
145 DECODE_OR (0xfbf08f00, 0xf1100f00),
146 /* CMP 1111 0x01 1011 xxxx 0xxx 1111 xxxx xxxx */
147 DECODE_EMULATEX (0xfbf08f00, 0xf1b00f00, PROBES_T32_CMP,
148 REGS(NOPC, 0, 0, 0, 0)),
149
150 /* MOV 1111 0x00 010x 1111 0xxx xxxx xxxx xxxx */
151 /* MVN 1111 0x00 011x 1111 0xxx xxxx xxxx xxxx */
152 DECODE_EMULATEX (0xfbcf8000, 0xf04f0000, PROBES_T32_MOV,
153 REGS(0, 0, NOSPPC, 0, 0)),
154
155 /* ??? 1111 0x00 101x xxxx 0xxx xxxx xxxx xxxx */
156 DECODE_REJECT (0xfbe08000, 0xf0a00000),
157 /* ??? 1111 0x00 110x xxxx 0xxx xxxx xxxx xxxx */
158 /* ??? 1111 0x00 111x xxxx 0xxx xxxx xxxx xxxx */
159 DECODE_REJECT (0xfbc08000, 0xf0c00000),
160 /* ??? 1111 0x01 001x xxxx 0xxx xxxx xxxx xxxx */
161 DECODE_REJECT (0xfbe08000, 0xf1200000),
162 /* ??? 1111 0x01 100x xxxx 0xxx xxxx xxxx xxxx */
163 DECODE_REJECT (0xfbe08000, 0xf1800000),
164 /* ??? 1111 0x01 111x xxxx 0xxx xxxx xxxx xxxx */
165 DECODE_REJECT (0xfbe08000, 0xf1e00000),
166
167 /* ADD Rd, SP, #imm 1111 0x01 000x 1101 0xxx xxxx xxxx xxxx */
168 /* SUB Rd, SP, #imm 1111 0x01 101x 1101 0xxx xxxx xxxx xxxx */
169 DECODE_EMULATEX (0xfb4f8000, 0xf10d0000, PROBES_T32_ADDSUB,
170 REGS(SP, 0, NOPC, 0, 0)),
171
172 /* AND 1111 0x00 000x xxxx 0xxx xxxx xxxx xxxx */
173 /* BIC 1111 0x00 001x xxxx 0xxx xxxx xxxx xxxx */
174 /* ORR 1111 0x00 010x xxxx 0xxx xxxx xxxx xxxx */
175 /* ORN 1111 0x00 011x xxxx 0xxx xxxx xxxx xxxx */
176 /* EOR 1111 0x00 100x xxxx 0xxx xxxx xxxx xxxx */
177 /* ADD 1111 0x01 000x xxxx 0xxx xxxx xxxx xxxx */
178 /* ADC 1111 0x01 010x xxxx 0xxx xxxx xxxx xxxx */
179 /* SBC 1111 0x01 011x xxxx 0xxx xxxx xxxx xxxx */
180 /* SUB 1111 0x01 101x xxxx 0xxx xxxx xxxx xxxx */
181 /* RSB 1111 0x01 110x xxxx 0xxx xxxx xxxx xxxx */
182 DECODE_EMULATEX (0xfa008000, 0xf0000000, PROBES_T32_LOGICAL,
183 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
184
185 DECODE_END
186};
187
188static const union decode_item t32_table_1111_0x1x___0[] = {
189 /* Data-processing (plain binary immediate) */
190
191 /* ADDW Rd, PC, #imm 1111 0x10 0000 1111 0xxx xxxx xxxx xxxx */
192 DECODE_OR (0xfbff8000, 0xf20f0000),
193 /* SUBW Rd, PC, #imm 1111 0x10 1010 1111 0xxx xxxx xxxx xxxx */
194 DECODE_EMULATEX (0xfbff8000, 0xf2af0000, PROBES_T32_ADDWSUBW_PC,
195 REGS(PC, 0, NOSPPC, 0, 0)),
196
197 /* ADDW SP, SP, #imm 1111 0x10 0000 1101 0xxx 1101 xxxx xxxx */
198 DECODE_OR (0xfbff8f00, 0xf20d0d00),
199 /* SUBW SP, SP, #imm 1111 0x10 1010 1101 0xxx 1101 xxxx xxxx */
200 DECODE_EMULATEX (0xfbff8f00, 0xf2ad0d00, PROBES_T32_ADDWSUBW,
201 REGS(SP, 0, SP, 0, 0)),
202
203 /* ADDW 1111 0x10 0000 xxxx 0xxx xxxx xxxx xxxx */
204 DECODE_OR (0xfbf08000, 0xf2000000),
205 /* SUBW 1111 0x10 1010 xxxx 0xxx xxxx xxxx xxxx */
206 DECODE_EMULATEX (0xfbf08000, 0xf2a00000, PROBES_T32_ADDWSUBW,
207 REGS(NOPCX, 0, NOSPPC, 0, 0)),
208
209 /* MOVW 1111 0x10 0100 xxxx 0xxx xxxx xxxx xxxx */
210 /* MOVT 1111 0x10 1100 xxxx 0xxx xxxx xxxx xxxx */
211 DECODE_EMULATEX (0xfb708000, 0xf2400000, PROBES_T32_MOVW,
212 REGS(0, 0, NOSPPC, 0, 0)),
213
214 /* SSAT16 1111 0x11 0010 xxxx 0000 xxxx 00xx xxxx */
215 /* SSAT 1111 0x11 00x0 xxxx 0xxx xxxx xxxx xxxx */
216 /* USAT16 1111 0x11 1010 xxxx 0000 xxxx 00xx xxxx */
217 /* USAT 1111 0x11 10x0 xxxx 0xxx xxxx xxxx xxxx */
218 DECODE_EMULATEX (0xfb508000, 0xf3000000, PROBES_T32_SAT,
219 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
220
221 /* SFBX 1111 0x11 0100 xxxx 0xxx xxxx xxxx xxxx */
222 /* UFBX 1111 0x11 1100 xxxx 0xxx xxxx xxxx xxxx */
223 DECODE_EMULATEX (0xfb708000, 0xf3400000, PROBES_T32_BITFIELD,
224 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
225
226 /* BFC 1111 0x11 0110 1111 0xxx xxxx xxxx xxxx */
227 DECODE_EMULATEX (0xfbff8000, 0xf36f0000, PROBES_T32_BITFIELD,
228 REGS(0, 0, NOSPPC, 0, 0)),
229
230 /* BFI 1111 0x11 0110 xxxx 0xxx xxxx xxxx xxxx */
231 DECODE_EMULATEX (0xfbf08000, 0xf3600000, PROBES_T32_BITFIELD,
232 REGS(NOSPPCX, 0, NOSPPC, 0, 0)),
233
234 DECODE_END
235};
236
237static const union decode_item t32_table_1111_0xxx___1[] = {
238 /* Branches and miscellaneous control */
239
240 /* YIELD 1111 0011 1010 xxxx 10x0 x000 0000 0001 */
241 DECODE_OR (0xfff0d7ff, 0xf3a08001),
242 /* SEV 1111 0011 1010 xxxx 10x0 x000 0000 0100 */
243 DECODE_EMULATE (0xfff0d7ff, 0xf3a08004, PROBES_T32_SEV),
244 /* NOP 1111 0011 1010 xxxx 10x0 x000 0000 0000 */
245 /* WFE 1111 0011 1010 xxxx 10x0 x000 0000 0010 */
246 /* WFI 1111 0011 1010 xxxx 10x0 x000 0000 0011 */
247 DECODE_SIMULATE (0xfff0d7fc, 0xf3a08000, PROBES_T32_WFE),
248
249 /* MRS Rd, CPSR 1111 0011 1110 xxxx 10x0 xxxx xxxx xxxx */
250 DECODE_SIMULATEX(0xfff0d000, 0xf3e08000, PROBES_T32_MRS,
251 REGS(0, 0, NOSPPC, 0, 0)),
252
253 /*
254 * Unsupported instructions
255 * 1111 0x11 1xxx xxxx 10x0 xxxx xxxx xxxx
256 *
257 * MSR 1111 0011 100x xxxx 10x0 xxxx xxxx xxxx
258 * DBG hint 1111 0011 1010 xxxx 10x0 x000 1111 xxxx
259 * Unallocated hints 1111 0011 1010 xxxx 10x0 x000 xxxx xxxx
260 * CPS 1111 0011 1010 xxxx 10x0 xxxx xxxx xxxx
261 * CLREX/DSB/DMB/ISB 1111 0011 1011 xxxx 10x0 xxxx xxxx xxxx
262 * BXJ 1111 0011 1100 xxxx 10x0 xxxx xxxx xxxx
263 * SUBS PC,LR,#<imm8> 1111 0011 1101 xxxx 10x0 xxxx xxxx xxxx
264 * MRS Rd, SPSR 1111 0011 1111 xxxx 10x0 xxxx xxxx xxxx
265 * SMC 1111 0111 1111 xxxx 1000 xxxx xxxx xxxx
266 * UNDEFINED 1111 0111 1111 xxxx 1010 xxxx xxxx xxxx
267 * ??? 1111 0111 1xxx xxxx 1010 xxxx xxxx xxxx
268 */
269 DECODE_REJECT (0xfb80d000, 0xf3808000),
270
271 /* Bcc 1111 0xxx xxxx xxxx 10x0 xxxx xxxx xxxx */
272 DECODE_CUSTOM (0xf800d000, 0xf0008000, PROBES_T32_BRANCH_COND),
273
274 /* BLX 1111 0xxx xxxx xxxx 11x0 xxxx xxxx xxx0 */
275 DECODE_OR (0xf800d001, 0xf000c000),
276 /* B 1111 0xxx xxxx xxxx 10x1 xxxx xxxx xxxx */
277 /* BL 1111 0xxx xxxx xxxx 11x1 xxxx xxxx xxxx */
278 DECODE_SIMULATE (0xf8009000, 0xf0009000, PROBES_T32_BRANCH),
279
280 DECODE_END
281};
282
283static const union decode_item t32_table_1111_100x_x0x1__1111[] = {
284 /* Memory hints */
285
286 /* PLD (literal) 1111 1000 x001 1111 1111 xxxx xxxx xxxx */
287 /* PLI (literal) 1111 1001 x001 1111 1111 xxxx xxxx xxxx */
288 DECODE_SIMULATE (0xfe7ff000, 0xf81ff000, PROBES_T32_PLDI),
289
290 /* PLD{W} (immediate) 1111 1000 10x1 xxxx 1111 xxxx xxxx xxxx */
291 DECODE_OR (0xffd0f000, 0xf890f000),
292 /* PLD{W} (immediate) 1111 1000 00x1 xxxx 1111 1100 xxxx xxxx */
293 DECODE_OR (0xffd0ff00, 0xf810fc00),
294 /* PLI (immediate) 1111 1001 1001 xxxx 1111 xxxx xxxx xxxx */
295 DECODE_OR (0xfff0f000, 0xf990f000),
296 /* PLI (immediate) 1111 1001 0001 xxxx 1111 1100 xxxx xxxx */
297 DECODE_SIMULATEX(0xfff0ff00, 0xf910fc00, PROBES_T32_PLDI,
298 REGS(NOPCX, 0, 0, 0, 0)),
299
300 /* PLD{W} (register) 1111 1000 00x1 xxxx 1111 0000 00xx xxxx */
301 DECODE_OR (0xffd0ffc0, 0xf810f000),
302 /* PLI (register) 1111 1001 0001 xxxx 1111 0000 00xx xxxx */
303 DECODE_SIMULATEX(0xfff0ffc0, 0xf910f000, PROBES_T32_PLDI,
304 REGS(NOPCX, 0, 0, 0, NOSPPC)),
305
306 /* Other unallocated instructions... */
307 DECODE_END
308};
309
310static const union decode_item t32_table_1111_100x[] = {
311 /* Store/Load single data item */
312
313 /* ??? 1111 100x x11x xxxx xxxx xxxx xxxx xxxx */
314 DECODE_REJECT (0xfe600000, 0xf8600000),
315
316 /* ??? 1111 1001 0101 xxxx xxxx xxxx xxxx xxxx */
317 DECODE_REJECT (0xfff00000, 0xf9500000),
318
319 /* ??? 1111 100x 0xxx xxxx xxxx 10x0 xxxx xxxx */
320 DECODE_REJECT (0xfe800d00, 0xf8000800),
321
322 /* STRBT 1111 1000 0000 xxxx xxxx 1110 xxxx xxxx */
323 /* STRHT 1111 1000 0010 xxxx xxxx 1110 xxxx xxxx */
324 /* STRT 1111 1000 0100 xxxx xxxx 1110 xxxx xxxx */
325 /* LDRBT 1111 1000 0001 xxxx xxxx 1110 xxxx xxxx */
326 /* LDRSBT 1111 1001 0001 xxxx xxxx 1110 xxxx xxxx */
327 /* LDRHT 1111 1000 0011 xxxx xxxx 1110 xxxx xxxx */
328 /* LDRSHT 1111 1001 0011 xxxx xxxx 1110 xxxx xxxx */
329 /* LDRT 1111 1000 0101 xxxx xxxx 1110 xxxx xxxx */
330 DECODE_REJECT (0xfe800f00, 0xf8000e00),
331
332 /* STR{,B,H} Rn,[PC...] 1111 1000 xxx0 1111 xxxx xxxx xxxx xxxx */
333 DECODE_REJECT (0xff1f0000, 0xf80f0000),
334
335 /* STR{,B,H} PC,[Rn...] 1111 1000 xxx0 xxxx 1111 xxxx xxxx xxxx */
336 DECODE_REJECT (0xff10f000, 0xf800f000),
337
338 /* LDR (literal) 1111 1000 x101 1111 xxxx xxxx xxxx xxxx */
339 DECODE_SIMULATEX(0xff7f0000, 0xf85f0000, PROBES_T32_LDR_LIT,
340 REGS(PC, ANY, 0, 0, 0)),
341
342 /* STR (immediate) 1111 1000 0100 xxxx xxxx 1xxx xxxx xxxx */
343 /* LDR (immediate) 1111 1000 0101 xxxx xxxx 1xxx xxxx xxxx */
344 DECODE_OR (0xffe00800, 0xf8400800),
345 /* STR (immediate) 1111 1000 1100 xxxx xxxx xxxx xxxx xxxx */
346 /* LDR (immediate) 1111 1000 1101 xxxx xxxx xxxx xxxx xxxx */
347 DECODE_EMULATEX (0xffe00000, 0xf8c00000, PROBES_T32_LDRSTR,
348 REGS(NOPCX, ANY, 0, 0, 0)),
349
350 /* STR (register) 1111 1000 0100 xxxx xxxx 0000 00xx xxxx */
351 /* LDR (register) 1111 1000 0101 xxxx xxxx 0000 00xx xxxx */
352 DECODE_EMULATEX (0xffe00fc0, 0xf8400000, PROBES_T32_LDRSTR,
353 REGS(NOPCX, ANY, 0, 0, NOSPPC)),
354
355 /* LDRB (literal) 1111 1000 x001 1111 xxxx xxxx xxxx xxxx */
356 /* LDRSB (literal) 1111 1001 x001 1111 xxxx xxxx xxxx xxxx */
357 /* LDRH (literal) 1111 1000 x011 1111 xxxx xxxx xxxx xxxx */
358 /* LDRSH (literal) 1111 1001 x011 1111 xxxx xxxx xxxx xxxx */
359 DECODE_SIMULATEX(0xfe5f0000, 0xf81f0000, PROBES_T32_LDR_LIT,
360 REGS(PC, NOSPPCX, 0, 0, 0)),
361
362 /* STRB (immediate) 1111 1000 0000 xxxx xxxx 1xxx xxxx xxxx */
363 /* STRH (immediate) 1111 1000 0010 xxxx xxxx 1xxx xxxx xxxx */
364 /* LDRB (immediate) 1111 1000 0001 xxxx xxxx 1xxx xxxx xxxx */
365 /* LDRSB (immediate) 1111 1001 0001 xxxx xxxx 1xxx xxxx xxxx */
366 /* LDRH (immediate) 1111 1000 0011 xxxx xxxx 1xxx xxxx xxxx */
367 /* LDRSH (immediate) 1111 1001 0011 xxxx xxxx 1xxx xxxx xxxx */
368 DECODE_OR (0xfec00800, 0xf8000800),
369 /* STRB (immediate) 1111 1000 1000 xxxx xxxx xxxx xxxx xxxx */
370 /* STRH (immediate) 1111 1000 1010 xxxx xxxx xxxx xxxx xxxx */
371 /* LDRB (immediate) 1111 1000 1001 xxxx xxxx xxxx xxxx xxxx */
372 /* LDRSB (immediate) 1111 1001 1001 xxxx xxxx xxxx xxxx xxxx */
373 /* LDRH (immediate) 1111 1000 1011 xxxx xxxx xxxx xxxx xxxx */
374 /* LDRSH (immediate) 1111 1001 1011 xxxx xxxx xxxx xxxx xxxx */
375 DECODE_EMULATEX (0xfec00000, 0xf8800000, PROBES_T32_LDRSTR,
376 REGS(NOPCX, NOSPPCX, 0, 0, 0)),
377
378 /* STRB (register) 1111 1000 0000 xxxx xxxx 0000 00xx xxxx */
379 /* STRH (register) 1111 1000 0010 xxxx xxxx 0000 00xx xxxx */
380 /* LDRB (register) 1111 1000 0001 xxxx xxxx 0000 00xx xxxx */
381 /* LDRSB (register) 1111 1001 0001 xxxx xxxx 0000 00xx xxxx */
382 /* LDRH (register) 1111 1000 0011 xxxx xxxx 0000 00xx xxxx */
383 /* LDRSH (register) 1111 1001 0011 xxxx xxxx 0000 00xx xxxx */
384 DECODE_EMULATEX (0xfe800fc0, 0xf8000000, PROBES_T32_LDRSTR,
385 REGS(NOPCX, NOSPPCX, 0, 0, NOSPPC)),
386
387 /* Other unallocated instructions... */
388 DECODE_END
389};
390
391static const union decode_item t32_table_1111_1010___1111[] = {
392 /* Data-processing (register) */
393
394 /* ??? 1111 1010 011x xxxx 1111 xxxx 1xxx xxxx */
395 DECODE_REJECT (0xffe0f080, 0xfa60f080),
396
397 /* SXTH 1111 1010 0000 1111 1111 xxxx 1xxx xxxx */
398 /* UXTH 1111 1010 0001 1111 1111 xxxx 1xxx xxxx */
399 /* SXTB16 1111 1010 0010 1111 1111 xxxx 1xxx xxxx */
400 /* UXTB16 1111 1010 0011 1111 1111 xxxx 1xxx xxxx */
401 /* SXTB 1111 1010 0100 1111 1111 xxxx 1xxx xxxx */
402 /* UXTB 1111 1010 0101 1111 1111 xxxx 1xxx xxxx */
403 DECODE_EMULATEX (0xff8ff080, 0xfa0ff080, PROBES_T32_SIGN_EXTEND,
404 REGS(0, 0, NOSPPC, 0, NOSPPC)),
405
406
407 /* ??? 1111 1010 1xxx xxxx 1111 xxxx 0x11 xxxx */
408 DECODE_REJECT (0xff80f0b0, 0xfa80f030),
409 /* ??? 1111 1010 1x11 xxxx 1111 xxxx 0xxx xxxx */
410 DECODE_REJECT (0xffb0f080, 0xfab0f000),
411
412 /* SADD16 1111 1010 1001 xxxx 1111 xxxx 0000 xxxx */
413 /* SASX 1111 1010 1010 xxxx 1111 xxxx 0000 xxxx */
414 /* SSAX 1111 1010 1110 xxxx 1111 xxxx 0000 xxxx */
415 /* SSUB16 1111 1010 1101 xxxx 1111 xxxx 0000 xxxx */
416 /* SADD8 1111 1010 1000 xxxx 1111 xxxx 0000 xxxx */
417 /* SSUB8 1111 1010 1100 xxxx 1111 xxxx 0000 xxxx */
418
419 /* QADD16 1111 1010 1001 xxxx 1111 xxxx 0001 xxxx */
420 /* QASX 1111 1010 1010 xxxx 1111 xxxx 0001 xxxx */
421 /* QSAX 1111 1010 1110 xxxx 1111 xxxx 0001 xxxx */
422 /* QSUB16 1111 1010 1101 xxxx 1111 xxxx 0001 xxxx */
423 /* QADD8 1111 1010 1000 xxxx 1111 xxxx 0001 xxxx */
424 /* QSUB8 1111 1010 1100 xxxx 1111 xxxx 0001 xxxx */
425
426 /* SHADD16 1111 1010 1001 xxxx 1111 xxxx 0010 xxxx */
427 /* SHASX 1111 1010 1010 xxxx 1111 xxxx 0010 xxxx */
428 /* SHSAX 1111 1010 1110 xxxx 1111 xxxx 0010 xxxx */
429 /* SHSUB16 1111 1010 1101 xxxx 1111 xxxx 0010 xxxx */
430 /* SHADD8 1111 1010 1000 xxxx 1111 xxxx 0010 xxxx */
431 /* SHSUB8 1111 1010 1100 xxxx 1111 xxxx 0010 xxxx */
432
433 /* UADD16 1111 1010 1001 xxxx 1111 xxxx 0100 xxxx */
434 /* UASX 1111 1010 1010 xxxx 1111 xxxx 0100 xxxx */
435 /* USAX 1111 1010 1110 xxxx 1111 xxxx 0100 xxxx */
436 /* USUB16 1111 1010 1101 xxxx 1111 xxxx 0100 xxxx */
437 /* UADD8 1111 1010 1000 xxxx 1111 xxxx 0100 xxxx */
438 /* USUB8 1111 1010 1100 xxxx 1111 xxxx 0100 xxxx */
439
440 /* UQADD16 1111 1010 1001 xxxx 1111 xxxx 0101 xxxx */
441 /* UQASX 1111 1010 1010 xxxx 1111 xxxx 0101 xxxx */
442 /* UQSAX 1111 1010 1110 xxxx 1111 xxxx 0101 xxxx */
443 /* UQSUB16 1111 1010 1101 xxxx 1111 xxxx 0101 xxxx */
444 /* UQADD8 1111 1010 1000 xxxx 1111 xxxx 0101 xxxx */
445 /* UQSUB8 1111 1010 1100 xxxx 1111 xxxx 0101 xxxx */
446
447 /* UHADD16 1111 1010 1001 xxxx 1111 xxxx 0110 xxxx */
448 /* UHASX 1111 1010 1010 xxxx 1111 xxxx 0110 xxxx */
449 /* UHSAX 1111 1010 1110 xxxx 1111 xxxx 0110 xxxx */
450 /* UHSUB16 1111 1010 1101 xxxx 1111 xxxx 0110 xxxx */
451 /* UHADD8 1111 1010 1000 xxxx 1111 xxxx 0110 xxxx */
452 /* UHSUB8 1111 1010 1100 xxxx 1111 xxxx 0110 xxxx */
453 DECODE_OR (0xff80f080, 0xfa80f000),
454
455 /* SXTAH 1111 1010 0000 xxxx 1111 xxxx 1xxx xxxx */
456 /* UXTAH 1111 1010 0001 xxxx 1111 xxxx 1xxx xxxx */
457 /* SXTAB16 1111 1010 0010 xxxx 1111 xxxx 1xxx xxxx */
458 /* UXTAB16 1111 1010 0011 xxxx 1111 xxxx 1xxx xxxx */
459 /* SXTAB 1111 1010 0100 xxxx 1111 xxxx 1xxx xxxx */
460 /* UXTAB 1111 1010 0101 xxxx 1111 xxxx 1xxx xxxx */
461 DECODE_OR (0xff80f080, 0xfa00f080),
462
463 /* QADD 1111 1010 1000 xxxx 1111 xxxx 1000 xxxx */
464 /* QDADD 1111 1010 1000 xxxx 1111 xxxx 1001 xxxx */
465 /* QSUB 1111 1010 1000 xxxx 1111 xxxx 1010 xxxx */
466 /* QDSUB 1111 1010 1000 xxxx 1111 xxxx 1011 xxxx */
467 DECODE_OR (0xfff0f0c0, 0xfa80f080),
468
469 /* SEL 1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
470 DECODE_OR (0xfff0f0f0, 0xfaa0f080),
471
472 /* LSL 1111 1010 000x xxxx 1111 xxxx 0000 xxxx */
473 /* LSR 1111 1010 001x xxxx 1111 xxxx 0000 xxxx */
474 /* ASR 1111 1010 010x xxxx 1111 xxxx 0000 xxxx */
475 /* ROR 1111 1010 011x xxxx 1111 xxxx 0000 xxxx */
476 DECODE_EMULATEX (0xff80f0f0, 0xfa00f000, PROBES_T32_MEDIA,
477 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
478
479 /* CLZ 1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
480 DECODE_OR (0xfff0f0f0, 0xfab0f080),
481
482 /* REV 1111 1010 1001 xxxx 1111 xxxx 1000 xxxx */
483 /* REV16 1111 1010 1001 xxxx 1111 xxxx 1001 xxxx */
484 /* RBIT 1111 1010 1001 xxxx 1111 xxxx 1010 xxxx */
485 /* REVSH 1111 1010 1001 xxxx 1111 xxxx 1011 xxxx */
486 DECODE_EMULATEX (0xfff0f0c0, 0xfa90f080, PROBES_T32_REVERSE,
487 REGS(NOSPPC, 0, NOSPPC, 0, SAMEAS16)),
488
489 /* Other unallocated instructions... */
490 DECODE_END
491};
492
493static const union decode_item t32_table_1111_1011_0[] = {
494 /* Multiply, multiply accumulate, and absolute difference */
495
496 /* ??? 1111 1011 0000 xxxx 1111 xxxx 0001 xxxx */
497 DECODE_REJECT (0xfff0f0f0, 0xfb00f010),
498 /* ??? 1111 1011 0111 xxxx 1111 xxxx 0001 xxxx */
499 DECODE_REJECT (0xfff0f0f0, 0xfb70f010),
500
501 /* SMULxy 1111 1011 0001 xxxx 1111 xxxx 00xx xxxx */
502 DECODE_OR (0xfff0f0c0, 0xfb10f000),
503 /* MUL 1111 1011 0000 xxxx 1111 xxxx 0000 xxxx */
504 /* SMUAD{X} 1111 1011 0010 xxxx 1111 xxxx 000x xxxx */
505 /* SMULWy 1111 1011 0011 xxxx 1111 xxxx 000x xxxx */
506 /* SMUSD{X} 1111 1011 0100 xxxx 1111 xxxx 000x xxxx */
507 /* SMMUL{R} 1111 1011 0101 xxxx 1111 xxxx 000x xxxx */
508 /* USAD8 1111 1011 0111 xxxx 1111 xxxx 0000 xxxx */
509 DECODE_EMULATEX (0xff80f0e0, 0xfb00f000, PROBES_T32_MUL_ADD,
510 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
511
512 /* ??? 1111 1011 0111 xxxx xxxx xxxx 0001 xxxx */
513 DECODE_REJECT (0xfff000f0, 0xfb700010),
514
515 /* SMLAxy 1111 1011 0001 xxxx xxxx xxxx 00xx xxxx */
516 DECODE_OR (0xfff000c0, 0xfb100000),
517 /* MLA 1111 1011 0000 xxxx xxxx xxxx 0000 xxxx */
518 /* MLS 1111 1011 0000 xxxx xxxx xxxx 0001 xxxx */
519 /* SMLAD{X} 1111 1011 0010 xxxx xxxx xxxx 000x xxxx */
520 /* SMLAWy 1111 1011 0011 xxxx xxxx xxxx 000x xxxx */
521 /* SMLSD{X} 1111 1011 0100 xxxx xxxx xxxx 000x xxxx */
522 /* SMMLA{R} 1111 1011 0101 xxxx xxxx xxxx 000x xxxx */
523 /* SMMLS{R} 1111 1011 0110 xxxx xxxx xxxx 000x xxxx */
524 /* USADA8 1111 1011 0111 xxxx xxxx xxxx 0000 xxxx */
525 DECODE_EMULATEX (0xff8000c0, 0xfb000000, PROBES_T32_MUL_ADD2,
526 REGS(NOSPPC, NOSPPCX, NOSPPC, 0, NOSPPC)),
527
528 /* Other unallocated instructions... */
529 DECODE_END
530};
531
532static const union decode_item t32_table_1111_1011_1[] = {
533 /* Long multiply, long multiply accumulate, and divide */
534
535 /* UMAAL 1111 1011 1110 xxxx xxxx xxxx 0110 xxxx */
536 DECODE_OR (0xfff000f0, 0xfbe00060),
537 /* SMLALxy 1111 1011 1100 xxxx xxxx xxxx 10xx xxxx */
538 DECODE_OR (0xfff000c0, 0xfbc00080),
539 /* SMLALD{X} 1111 1011 1100 xxxx xxxx xxxx 110x xxxx */
540 /* SMLSLD{X} 1111 1011 1101 xxxx xxxx xxxx 110x xxxx */
541 DECODE_OR (0xffe000e0, 0xfbc000c0),
542 /* SMULL 1111 1011 1000 xxxx xxxx xxxx 0000 xxxx */
543 /* UMULL 1111 1011 1010 xxxx xxxx xxxx 0000 xxxx */
544 /* SMLAL 1111 1011 1100 xxxx xxxx xxxx 0000 xxxx */
545 /* UMLAL 1111 1011 1110 xxxx xxxx xxxx 0000 xxxx */
546 DECODE_EMULATEX (0xff9000f0, 0xfb800000, PROBES_T32_MUL_ADD_LONG,
547 REGS(NOSPPC, NOSPPC, NOSPPC, 0, NOSPPC)),
548
549 /* SDIV 1111 1011 1001 xxxx xxxx xxxx 1111 xxxx */
550 /* UDIV 1111 1011 1011 xxxx xxxx xxxx 1111 xxxx */
551 /* Other unallocated instructions... */
552 DECODE_END
553};
554
555const union decode_item probes_decode_thumb32_table[] = {
556
557 /*
558 * Load/store multiple instructions
559 * 1110 100x x0xx xxxx xxxx xxxx xxxx xxxx
560 */
561 DECODE_TABLE (0xfe400000, 0xe8000000, t32_table_1110_100x_x0xx),
562
563 /*
564 * Load/store dual, load/store exclusive, table branch
565 * 1110 100x x1xx xxxx xxxx xxxx xxxx xxxx
566 */
567 DECODE_TABLE (0xfe400000, 0xe8400000, t32_table_1110_100x_x1xx),
568
569 /*
570 * Data-processing (shifted register)
571 * 1110 101x xxxx xxxx xxxx xxxx xxxx xxxx
572 */
573 DECODE_TABLE (0xfe000000, 0xea000000, t32_table_1110_101x),
574
575 /*
576 * Coprocessor instructions
577 * 1110 11xx xxxx xxxx xxxx xxxx xxxx xxxx
578 */
579 DECODE_REJECT (0xfc000000, 0xec000000),
580
581 /*
582 * Data-processing (modified immediate)
583 * 1111 0x0x xxxx xxxx 0xxx xxxx xxxx xxxx
584 */
585 DECODE_TABLE (0xfa008000, 0xf0000000, t32_table_1111_0x0x___0),
586
587 /*
588 * Data-processing (plain binary immediate)
589 * 1111 0x1x xxxx xxxx 0xxx xxxx xxxx xxxx
590 */
591 DECODE_TABLE (0xfa008000, 0xf2000000, t32_table_1111_0x1x___0),
592
593 /*
594 * Branches and miscellaneous control
595 * 1111 0xxx xxxx xxxx 1xxx xxxx xxxx xxxx
596 */
597 DECODE_TABLE (0xf8008000, 0xf0008000, t32_table_1111_0xxx___1),
598
599 /*
600 * Advanced SIMD element or structure load/store instructions
601 * 1111 1001 xxx0 xxxx xxxx xxxx xxxx xxxx
602 */
603 DECODE_REJECT (0xff100000, 0xf9000000),
604
605 /*
606 * Memory hints
607 * 1111 100x x0x1 xxxx 1111 xxxx xxxx xxxx
608 */
609 DECODE_TABLE (0xfe50f000, 0xf810f000, t32_table_1111_100x_x0x1__1111),
610
611 /*
612 * Store single data item
613 * 1111 1000 xxx0 xxxx xxxx xxxx xxxx xxxx
614 * Load single data items
615 * 1111 100x xxx1 xxxx xxxx xxxx xxxx xxxx
616 */
617 DECODE_TABLE (0xfe000000, 0xf8000000, t32_table_1111_100x),
618
619 /*
620 * Data-processing (register)
621 * 1111 1010 xxxx xxxx 1111 xxxx xxxx xxxx
622 */
623 DECODE_TABLE (0xff00f000, 0xfa00f000, t32_table_1111_1010___1111),
624
625 /*
626 * Multiply, multiply accumulate, and absolute difference
627 * 1111 1011 0xxx xxxx xxxx xxxx xxxx xxxx
628 */
629 DECODE_TABLE (0xff800000, 0xfb000000, t32_table_1111_1011_0),
630
631 /*
632 * Long multiply, long multiply accumulate, and divide
633 * 1111 1011 1xxx xxxx xxxx xxxx xxxx xxxx
634 */
635 DECODE_TABLE (0xff800000, 0xfb800000, t32_table_1111_1011_1),
636
637 /*
638 * Coprocessor instructions
639 * 1111 11xx xxxx xxxx xxxx xxxx xxxx xxxx
640 */
641 DECODE_END
642};
643#ifdef CONFIG_ARM_KPROBES_TEST_MODULE
644EXPORT_SYMBOL_GPL(probes_decode_thumb32_table);
645#endif
646
647static const union decode_item t16_table_1011[] = {
648 /* Miscellaneous 16-bit instructions */
649
650 /* ADD (SP plus immediate) 1011 0000 0xxx xxxx */
651 /* SUB (SP minus immediate) 1011 0000 1xxx xxxx */
652 DECODE_SIMULATE (0xff00, 0xb000, PROBES_T16_ADD_SP),
653
654 /* CBZ 1011 00x1 xxxx xxxx */
655 /* CBNZ 1011 10x1 xxxx xxxx */
656 DECODE_SIMULATE (0xf500, 0xb100, PROBES_T16_CBZ),
657
658 /* SXTH 1011 0010 00xx xxxx */
659 /* SXTB 1011 0010 01xx xxxx */
660 /* UXTH 1011 0010 10xx xxxx */
661 /* UXTB 1011 0010 11xx xxxx */
662 /* REV 1011 1010 00xx xxxx */
663 /* REV16 1011 1010 01xx xxxx */
664 /* ??? 1011 1010 10xx xxxx */
665 /* REVSH 1011 1010 11xx xxxx */
666 DECODE_REJECT (0xffc0, 0xba80),
667 DECODE_EMULATE (0xf500, 0xb000, PROBES_T16_SIGN_EXTEND),
668
669 /* PUSH 1011 010x xxxx xxxx */
670 DECODE_CUSTOM (0xfe00, 0xb400, PROBES_T16_PUSH),
671 /* POP 1011 110x xxxx xxxx */
672 DECODE_CUSTOM (0xfe00, 0xbc00, PROBES_T16_POP),
673
674 /*
675 * If-Then, and hints
676 * 1011 1111 xxxx xxxx
677 */
678
679 /* YIELD 1011 1111 0001 0000 */
680 DECODE_OR (0xffff, 0xbf10),
681 /* SEV 1011 1111 0100 0000 */
682 DECODE_EMULATE (0xffff, 0xbf40, PROBES_T16_SEV),
683 /* NOP 1011 1111 0000 0000 */
684 /* WFE 1011 1111 0010 0000 */
685 /* WFI 1011 1111 0011 0000 */
686 DECODE_SIMULATE (0xffcf, 0xbf00, PROBES_T16_WFE),
687 /* Unassigned hints 1011 1111 xxxx 0000 */
688 DECODE_REJECT (0xff0f, 0xbf00),
689 /* IT 1011 1111 xxxx xxxx */
690 DECODE_CUSTOM (0xff00, 0xbf00, PROBES_T16_IT),
691
692 /* SETEND 1011 0110 010x xxxx */
693 /* CPS 1011 0110 011x xxxx */
694 /* BKPT 1011 1110 xxxx xxxx */
695 /* And unallocated instructions... */
696 DECODE_END
697};
698
699const union decode_item probes_decode_thumb16_table[] = {
700
701 /*
702 * Shift (immediate), add, subtract, move, and compare
703 * 00xx xxxx xxxx xxxx
704 */
705
706 /* CMP (immediate) 0010 1xxx xxxx xxxx */
707 DECODE_EMULATE (0xf800, 0x2800, PROBES_T16_CMP),
708
709 /* ADD (register) 0001 100x xxxx xxxx */
710 /* SUB (register) 0001 101x xxxx xxxx */
711 /* LSL (immediate) 0000 0xxx xxxx xxxx */
712 /* LSR (immediate) 0000 1xxx xxxx xxxx */
713 /* ASR (immediate) 0001 0xxx xxxx xxxx */
714 /* ADD (immediate, Thumb) 0001 110x xxxx xxxx */
715 /* SUB (immediate, Thumb) 0001 111x xxxx xxxx */
716 /* MOV (immediate) 0010 0xxx xxxx xxxx */
717 /* ADD (immediate, Thumb) 0011 0xxx xxxx xxxx */
718 /* SUB (immediate, Thumb) 0011 1xxx xxxx xxxx */
719 DECODE_EMULATE (0xc000, 0x0000, PROBES_T16_ADDSUB),
720
721 /*
722 * 16-bit Thumb data-processing instructions
723 * 0100 00xx xxxx xxxx
724 */
725
726 /* TST (register) 0100 0010 00xx xxxx */
727 DECODE_EMULATE (0xffc0, 0x4200, PROBES_T16_CMP),
728 /* CMP (register) 0100 0010 10xx xxxx */
729 /* CMN (register) 0100 0010 11xx xxxx */
730 DECODE_EMULATE (0xff80, 0x4280, PROBES_T16_CMP),
731 /* AND (register) 0100 0000 00xx xxxx */
732 /* EOR (register) 0100 0000 01xx xxxx */
733 /* LSL (register) 0100 0000 10xx xxxx */
734 /* LSR (register) 0100 0000 11xx xxxx */
735 /* ASR (register) 0100 0001 00xx xxxx */
736 /* ADC (register) 0100 0001 01xx xxxx */
737 /* SBC (register) 0100 0001 10xx xxxx */
738 /* ROR (register) 0100 0001 11xx xxxx */
739 /* RSB (immediate) 0100 0010 01xx xxxx */
740 /* ORR (register) 0100 0011 00xx xxxx */
741 /* MUL 0100 0011 00xx xxxx */
742 /* BIC (register) 0100 0011 10xx xxxx */
743 /* MVN (register) 0100 0011 10xx xxxx */
744 DECODE_EMULATE (0xfc00, 0x4000, PROBES_T16_LOGICAL),
745
746 /*
747 * Special data instructions and branch and exchange
748 * 0100 01xx xxxx xxxx
749 */
750
751 /* BLX pc 0100 0111 1111 1xxx */
752 DECODE_REJECT (0xfff8, 0x47f8),
753
754 /* BX (register) 0100 0111 0xxx xxxx */
755 /* BLX (register) 0100 0111 1xxx xxxx */
756 DECODE_SIMULATE (0xff00, 0x4700, PROBES_T16_BLX),
757
758 /* ADD pc, pc 0100 0100 1111 1111 */
759 DECODE_REJECT (0xffff, 0x44ff),
760
761 /* ADD (register) 0100 0100 xxxx xxxx */
762 /* CMP (register) 0100 0101 xxxx xxxx */
763 /* MOV (register) 0100 0110 xxxx xxxx */
764 DECODE_CUSTOM (0xfc00, 0x4400, PROBES_T16_HIREGOPS),
765
766 /*
767 * Load from Literal Pool
768 * LDR (literal) 0100 1xxx xxxx xxxx
769 */
770 DECODE_SIMULATE (0xf800, 0x4800, PROBES_T16_LDR_LIT),
771
772 /*
773 * 16-bit Thumb Load/store instructions
774 * 0101 xxxx xxxx xxxx
775 * 011x xxxx xxxx xxxx
776 * 100x xxxx xxxx xxxx
777 */
778
779 /* STR (register) 0101 000x xxxx xxxx */
780 /* STRH (register) 0101 001x xxxx xxxx */
781 /* STRB (register) 0101 010x xxxx xxxx */
782 /* LDRSB (register) 0101 011x xxxx xxxx */
783 /* LDR (register) 0101 100x xxxx xxxx */
784 /* LDRH (register) 0101 101x xxxx xxxx */
785 /* LDRB (register) 0101 110x xxxx xxxx */
786 /* LDRSH (register) 0101 111x xxxx xxxx */
787 /* STR (immediate, Thumb) 0110 0xxx xxxx xxxx */
788 /* LDR (immediate, Thumb) 0110 1xxx xxxx xxxx */
789 /* STRB (immediate, Thumb) 0111 0xxx xxxx xxxx */
790 /* LDRB (immediate, Thumb) 0111 1xxx xxxx xxxx */
791 DECODE_EMULATE (0xc000, 0x4000, PROBES_T16_LDRHSTRH),
792 /* STRH (immediate, Thumb) 1000 0xxx xxxx xxxx */
793 /* LDRH (immediate, Thumb) 1000 1xxx xxxx xxxx */
794 DECODE_EMULATE (0xf000, 0x8000, PROBES_T16_LDRHSTRH),
795 /* STR (immediate, Thumb) 1001 0xxx xxxx xxxx */
796 /* LDR (immediate, Thumb) 1001 1xxx xxxx xxxx */
797 DECODE_SIMULATE (0xf000, 0x9000, PROBES_T16_LDRSTR),
798
799 /*
800 * Generate PC-/SP-relative address
801 * ADR (literal) 1010 0xxx xxxx xxxx
802 * ADD (SP plus immediate) 1010 1xxx xxxx xxxx
803 */
804 DECODE_SIMULATE (0xf000, 0xa000, PROBES_T16_ADR),
805
806 /*
807 * Miscellaneous 16-bit instructions
808 * 1011 xxxx xxxx xxxx
809 */
810 DECODE_TABLE (0xf000, 0xb000, t16_table_1011),
811
812 /* STM 1100 0xxx xxxx xxxx */
813 /* LDM 1100 1xxx xxxx xxxx */
814 DECODE_EMULATE (0xf000, 0xc000, PROBES_T16_LDMSTM),
815
816 /*
817 * Conditional branch, and Supervisor Call
818 */
819
820 /* Permanently UNDEFINED 1101 1110 xxxx xxxx */
821 /* SVC 1101 1111 xxxx xxxx */
822 DECODE_REJECT (0xfe00, 0xde00),
823
824 /* Conditional branch 1101 xxxx xxxx xxxx */
825 DECODE_CUSTOM (0xf000, 0xd000, PROBES_T16_BRANCH_COND),
826
827 /*
828 * Unconditional branch
829 * B 1110 0xxx xxxx xxxx
830 */
831 DECODE_SIMULATE (0xf800, 0xe000, PROBES_T16_BRANCH),
832
833 DECODE_END
834};
835#ifdef CONFIG_ARM_KPROBES_TEST_MODULE
836EXPORT_SYMBOL_GPL(probes_decode_thumb16_table);
837#endif
838
839static unsigned long __kprobes thumb_check_cc(unsigned long cpsr)
840{
841 if (unlikely(in_it_block(cpsr)))
842 return probes_condition_checks[current_cond(cpsr)](cpsr);
843 return true;
844}
845
846static void __kprobes thumb16_singlestep(probes_opcode_t opcode,
847 struct arch_probes_insn *asi,
848 struct pt_regs *regs)
849{
850 regs->ARM_pc += 2;
851 asi->insn_handler(opcode, asi, regs);
852 regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
853}
854
855static void __kprobes thumb32_singlestep(probes_opcode_t opcode,
856 struct arch_probes_insn *asi,
857 struct pt_regs *regs)
858{
859 regs->ARM_pc += 4;
860 asi->insn_handler(opcode, asi, regs);
861 regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
862}
863
864enum probes_insn __kprobes
865thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
866 bool emulate, const union decode_action *actions,
867 const struct decode_checker *checkers[])
868{
869 asi->insn_singlestep = thumb16_singlestep;
870 asi->insn_check_cc = thumb_check_cc;
871 return probes_decode_insn(insn, asi, probes_decode_thumb16_table, true,
872 emulate, actions, checkers);
873}
874
875enum probes_insn __kprobes
876thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
877 bool emulate, const union decode_action *actions,
878 const struct decode_checker *checkers[])
879{
880 asi->insn_singlestep = thumb32_singlestep;
881 asi->insn_check_cc = thumb_check_cc;
882 return probes_decode_insn(insn, asi, probes_decode_thumb32_table, true,
883 emulate, actions, checkers);
884}