2 * arch/arm/kernel/kprobes-thumb.c
4 * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
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.
11 #include <linux/stddef.h>
12 #include <linux/kernel.h>
13 #include <linux/kprobes.h>
14 #include <linux/module.h>
17 #include "probes-thumb.h"
19 /* These emulation encodings are functionally equivalent... */
20 #define t32_emulate_rd8rn16rm0ra12_noflags \
21 t32_emulate_rdlo12rdhi8rn16rm0_noflags
23 static const union decode_item t32_table_1110_100x_x0xx[] = {
24 /* Load/store multiple instructions */
26 /* Rn is PC 1110 100x x0xx 1111 xxxx xxxx xxxx xxxx */
27 DECODE_REJECT (0xfe4f0000, 0xe80f0000),
29 /* SRS 1110 1000 00x0 xxxx xxxx xxxx xxxx xxxx */
30 /* RFE 1110 1000 00x1 xxxx xxxx xxxx xxxx xxxx */
31 DECODE_REJECT (0xffc00000, 0xe8000000),
32 /* SRS 1110 1001 10x0 xxxx xxxx xxxx xxxx xxxx */
33 /* RFE 1110 1001 10x1 xxxx xxxx xxxx xxxx xxxx */
34 DECODE_REJECT (0xffc00000, 0xe9800000),
36 /* STM Rn, {...pc} 1110 100x x0x0 xxxx 1xxx xxxx xxxx xxxx */
37 DECODE_REJECT (0xfe508000, 0xe8008000),
38 /* LDM Rn, {...lr,pc} 1110 100x x0x1 xxxx 11xx xxxx xxxx xxxx */
39 DECODE_REJECT (0xfe50c000, 0xe810c000),
40 /* LDM/STM Rn, {...sp} 1110 100x x0xx xxxx xx1x xxxx xxxx xxxx */
41 DECODE_REJECT (0xfe402000, 0xe8002000),
43 /* STMIA 1110 1000 10x0 xxxx xxxx xxxx xxxx xxxx */
44 /* LDMIA 1110 1000 10x1 xxxx xxxx xxxx xxxx xxxx */
45 /* STMDB 1110 1001 00x0 xxxx xxxx xxxx xxxx xxxx */
46 /* LDMDB 1110 1001 00x1 xxxx xxxx xxxx xxxx xxxx */
47 DECODE_CUSTOM (0xfe400000, 0xe8000000, t32_decode_ldmstm),
52 static const union decode_item t32_table_1110_100x_x1xx[] = {
53 /* Load/store dual, load/store exclusive, table branch */
55 /* STRD (immediate) 1110 1000 x110 xxxx xxxx xxxx xxxx xxxx */
56 /* LDRD (immediate) 1110 1000 x111 xxxx xxxx xxxx xxxx xxxx */
57 DECODE_OR (0xff600000, 0xe8600000),
58 /* STRD (immediate) 1110 1001 x1x0 xxxx xxxx xxxx xxxx xxxx */
59 /* LDRD (immediate) 1110 1001 x1x1 xxxx xxxx xxxx xxxx xxxx */
60 DECODE_EMULATEX (0xff400000, 0xe9400000, t32_emulate_ldrdstrd,
61 REGS(NOPCWB, NOSPPC, NOSPPC, 0, 0)),
63 /* TBB 1110 1000 1101 xxxx xxxx xxxx 0000 xxxx */
64 /* TBH 1110 1000 1101 xxxx xxxx xxxx 0001 xxxx */
65 DECODE_SIMULATEX(0xfff000e0, 0xe8d00000, t32_simulate_table_branch,
66 REGS(NOSP, 0, 0, 0, NOSPPC)),
68 /* STREX 1110 1000 0100 xxxx xxxx xxxx xxxx xxxx */
69 /* LDREX 1110 1000 0101 xxxx xxxx xxxx xxxx xxxx */
70 /* STREXB 1110 1000 1100 xxxx xxxx xxxx 0100 xxxx */
71 /* STREXH 1110 1000 1100 xxxx xxxx xxxx 0101 xxxx */
72 /* STREXD 1110 1000 1100 xxxx xxxx xxxx 0111 xxxx */
73 /* LDREXB 1110 1000 1101 xxxx xxxx xxxx 0100 xxxx */
74 /* LDREXH 1110 1000 1101 xxxx xxxx xxxx 0101 xxxx */
75 /* LDREXD 1110 1000 1101 xxxx xxxx xxxx 0111 xxxx */
76 /* And unallocated instructions... */
80 static const union decode_item t32_table_1110_101x[] = {
81 /* Data-processing (shifted register) */
83 /* TST 1110 1010 0001 xxxx xxxx 1111 xxxx xxxx */
84 /* TEQ 1110 1010 1001 xxxx xxxx 1111 xxxx xxxx */
85 DECODE_EMULATEX (0xff700f00, 0xea100f00, t32_emulate_rd8rn16rm0_rwflags,
86 REGS(NOSPPC, 0, 0, 0, NOSPPC)),
88 /* CMN 1110 1011 0001 xxxx xxxx 1111 xxxx xxxx */
89 DECODE_OR (0xfff00f00, 0xeb100f00),
90 /* CMP 1110 1011 1011 xxxx xxxx 1111 xxxx xxxx */
91 DECODE_EMULATEX (0xfff00f00, 0xebb00f00, t32_emulate_rd8rn16rm0_rwflags,
92 REGS(NOPC, 0, 0, 0, NOSPPC)),
94 /* MOV 1110 1010 010x 1111 xxxx xxxx xxxx xxxx */
95 /* MVN 1110 1010 011x 1111 xxxx xxxx xxxx xxxx */
96 DECODE_EMULATEX (0xffcf0000, 0xea4f0000, t32_emulate_rd8rn16rm0_rwflags,
97 REGS(0, 0, NOSPPC, 0, NOSPPC)),
99 /* ??? 1110 1010 101x xxxx xxxx xxxx xxxx xxxx */
100 /* ??? 1110 1010 111x xxxx xxxx xxxx xxxx xxxx */
101 DECODE_REJECT (0xffa00000, 0xeaa00000),
102 /* ??? 1110 1011 001x xxxx xxxx xxxx xxxx xxxx */
103 DECODE_REJECT (0xffe00000, 0xeb200000),
104 /* ??? 1110 1011 100x xxxx xxxx xxxx xxxx xxxx */
105 DECODE_REJECT (0xffe00000, 0xeb800000),
106 /* ??? 1110 1011 111x xxxx xxxx xxxx xxxx xxxx */
107 DECODE_REJECT (0xffe00000, 0xebe00000),
109 /* ADD/SUB SP, SP, Rm, LSL #0..3 */
110 /* 1110 1011 x0xx 1101 x000 1101 xx00 xxxx */
111 DECODE_EMULATEX (0xff4f7f30, 0xeb0d0d00, t32_emulate_rd8rn16rm0_rwflags,
112 REGS(SP, 0, SP, 0, NOSPPC)),
114 /* ADD/SUB SP, SP, Rm, shift */
115 /* 1110 1011 x0xx 1101 xxxx 1101 xxxx xxxx */
116 DECODE_REJECT (0xff4f0f00, 0xeb0d0d00),
118 /* ADD/SUB Rd, SP, Rm, shift */
119 /* 1110 1011 x0xx 1101 xxxx xxxx xxxx xxxx */
120 DECODE_EMULATEX (0xff4f0000, 0xeb0d0000, t32_emulate_rd8rn16rm0_rwflags,
121 REGS(SP, 0, NOPC, 0, NOSPPC)),
123 /* AND 1110 1010 000x xxxx xxxx xxxx xxxx xxxx */
124 /* BIC 1110 1010 001x xxxx xxxx xxxx xxxx xxxx */
125 /* ORR 1110 1010 010x xxxx xxxx xxxx xxxx xxxx */
126 /* ORN 1110 1010 011x xxxx xxxx xxxx xxxx xxxx */
127 /* EOR 1110 1010 100x xxxx xxxx xxxx xxxx xxxx */
128 /* PKH 1110 1010 110x xxxx xxxx xxxx xxxx xxxx */
129 /* ADD 1110 1011 000x xxxx xxxx xxxx xxxx xxxx */
130 /* ADC 1110 1011 010x xxxx xxxx xxxx xxxx xxxx */
131 /* SBC 1110 1011 011x xxxx xxxx xxxx xxxx xxxx */
132 /* SUB 1110 1011 101x xxxx xxxx xxxx xxxx xxxx */
133 /* RSB 1110 1011 110x xxxx xxxx xxxx xxxx xxxx */
134 DECODE_EMULATEX (0xfe000000, 0xea000000, t32_emulate_rd8rn16rm0_rwflags,
135 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
140 static const union decode_item t32_table_1111_0x0x___0[] = {
141 /* Data-processing (modified immediate) */
143 /* TST 1111 0x00 0001 xxxx 0xxx 1111 xxxx xxxx */
144 /* TEQ 1111 0x00 1001 xxxx 0xxx 1111 xxxx xxxx */
145 DECODE_EMULATEX (0xfb708f00, 0xf0100f00, t32_emulate_rd8rn16rm0_rwflags,
146 REGS(NOSPPC, 0, 0, 0, 0)),
148 /* CMN 1111 0x01 0001 xxxx 0xxx 1111 xxxx xxxx */
149 DECODE_OR (0xfbf08f00, 0xf1100f00),
150 /* CMP 1111 0x01 1011 xxxx 0xxx 1111 xxxx xxxx */
151 DECODE_EMULATEX (0xfbf08f00, 0xf1b00f00, t32_emulate_rd8rn16rm0_rwflags,
152 REGS(NOPC, 0, 0, 0, 0)),
154 /* MOV 1111 0x00 010x 1111 0xxx xxxx xxxx xxxx */
155 /* MVN 1111 0x00 011x 1111 0xxx xxxx xxxx xxxx */
156 DECODE_EMULATEX (0xfbcf8000, 0xf04f0000, t32_emulate_rd8rn16rm0_rwflags,
157 REGS(0, 0, NOSPPC, 0, 0)),
159 /* ??? 1111 0x00 101x xxxx 0xxx xxxx xxxx xxxx */
160 DECODE_REJECT (0xfbe08000, 0xf0a00000),
161 /* ??? 1111 0x00 110x xxxx 0xxx xxxx xxxx xxxx */
162 /* ??? 1111 0x00 111x xxxx 0xxx xxxx xxxx xxxx */
163 DECODE_REJECT (0xfbc08000, 0xf0c00000),
164 /* ??? 1111 0x01 001x xxxx 0xxx xxxx xxxx xxxx */
165 DECODE_REJECT (0xfbe08000, 0xf1200000),
166 /* ??? 1111 0x01 100x xxxx 0xxx xxxx xxxx xxxx */
167 DECODE_REJECT (0xfbe08000, 0xf1800000),
168 /* ??? 1111 0x01 111x xxxx 0xxx xxxx xxxx xxxx */
169 DECODE_REJECT (0xfbe08000, 0xf1e00000),
171 /* ADD Rd, SP, #imm 1111 0x01 000x 1101 0xxx xxxx xxxx xxxx */
172 /* SUB Rd, SP, #imm 1111 0x01 101x 1101 0xxx xxxx xxxx xxxx */
173 DECODE_EMULATEX (0xfb4f8000, 0xf10d0000, t32_emulate_rd8rn16rm0_rwflags,
174 REGS(SP, 0, NOPC, 0, 0)),
176 /* AND 1111 0x00 000x xxxx 0xxx xxxx xxxx xxxx */
177 /* BIC 1111 0x00 001x xxxx 0xxx xxxx xxxx xxxx */
178 /* ORR 1111 0x00 010x xxxx 0xxx xxxx xxxx xxxx */
179 /* ORN 1111 0x00 011x xxxx 0xxx xxxx xxxx xxxx */
180 /* EOR 1111 0x00 100x xxxx 0xxx xxxx xxxx xxxx */
181 /* ADD 1111 0x01 000x xxxx 0xxx xxxx xxxx xxxx */
182 /* ADC 1111 0x01 010x xxxx 0xxx xxxx xxxx xxxx */
183 /* SBC 1111 0x01 011x xxxx 0xxx xxxx xxxx xxxx */
184 /* SUB 1111 0x01 101x xxxx 0xxx xxxx xxxx xxxx */
185 /* RSB 1111 0x01 110x xxxx 0xxx xxxx xxxx xxxx */
186 DECODE_EMULATEX (0xfa008000, 0xf0000000, t32_emulate_rd8rn16rm0_rwflags,
187 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
192 static const union decode_item t32_table_1111_0x1x___0[] = {
193 /* Data-processing (plain binary immediate) */
195 /* ADDW Rd, PC, #imm 1111 0x10 0000 1111 0xxx xxxx xxxx xxxx */
196 DECODE_OR (0xfbff8000, 0xf20f0000),
197 /* SUBW Rd, PC, #imm 1111 0x10 1010 1111 0xxx xxxx xxxx xxxx */
198 DECODE_EMULATEX (0xfbff8000, 0xf2af0000, t32_emulate_rd8pc16_noflags,
199 REGS(PC, 0, NOSPPC, 0, 0)),
201 /* ADDW SP, SP, #imm 1111 0x10 0000 1101 0xxx 1101 xxxx xxxx */
202 DECODE_OR (0xfbff8f00, 0xf20d0d00),
203 /* SUBW SP, SP, #imm 1111 0x10 1010 1101 0xxx 1101 xxxx xxxx */
204 DECODE_EMULATEX (0xfbff8f00, 0xf2ad0d00, t32_emulate_rd8rn16_noflags,
205 REGS(SP, 0, SP, 0, 0)),
207 /* ADDW 1111 0x10 0000 xxxx 0xxx xxxx xxxx xxxx */
208 DECODE_OR (0xfbf08000, 0xf2000000),
209 /* SUBW 1111 0x10 1010 xxxx 0xxx xxxx xxxx xxxx */
210 DECODE_EMULATEX (0xfbf08000, 0xf2a00000, t32_emulate_rd8rn16_noflags,
211 REGS(NOPCX, 0, NOSPPC, 0, 0)),
213 /* MOVW 1111 0x10 0100 xxxx 0xxx xxxx xxxx xxxx */
214 /* MOVT 1111 0x10 1100 xxxx 0xxx xxxx xxxx xxxx */
215 DECODE_EMULATEX (0xfb708000, 0xf2400000, t32_emulate_rd8rn16_noflags,
216 REGS(0, 0, NOSPPC, 0, 0)),
218 /* SSAT16 1111 0x11 0010 xxxx 0000 xxxx 00xx xxxx */
219 /* SSAT 1111 0x11 00x0 xxxx 0xxx xxxx xxxx xxxx */
220 /* USAT16 1111 0x11 1010 xxxx 0000 xxxx 00xx xxxx */
221 /* USAT 1111 0x11 10x0 xxxx 0xxx xxxx xxxx xxxx */
222 DECODE_EMULATEX (0xfb508000, 0xf3000000, t32_emulate_rd8rn16rm0_rwflags,
223 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
225 /* SFBX 1111 0x11 0100 xxxx 0xxx xxxx xxxx xxxx */
226 /* UFBX 1111 0x11 1100 xxxx 0xxx xxxx xxxx xxxx */
227 DECODE_EMULATEX (0xfb708000, 0xf3400000, t32_emulate_rd8rn16_noflags,
228 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
230 /* BFC 1111 0x11 0110 1111 0xxx xxxx xxxx xxxx */
231 DECODE_EMULATEX (0xfbff8000, 0xf36f0000, t32_emulate_rd8rn16_noflags,
232 REGS(0, 0, NOSPPC, 0, 0)),
234 /* BFI 1111 0x11 0110 xxxx 0xxx xxxx xxxx xxxx */
235 DECODE_EMULATEX (0xfbf08000, 0xf3600000, t32_emulate_rd8rn16_noflags,
236 REGS(NOSPPCX, 0, NOSPPC, 0, 0)),
241 static const union decode_item t32_table_1111_0xxx___1[] = {
242 /* Branches and miscellaneous control */
244 /* YIELD 1111 0011 1010 xxxx 10x0 x000 0000 0001 */
245 DECODE_OR (0xfff0d7ff, 0xf3a08001),
246 /* SEV 1111 0011 1010 xxxx 10x0 x000 0000 0100 */
247 DECODE_EMULATE (0xfff0d7ff, 0xf3a08004, kprobe_emulate_none),
248 /* NOP 1111 0011 1010 xxxx 10x0 x000 0000 0000 */
249 /* WFE 1111 0011 1010 xxxx 10x0 x000 0000 0010 */
250 /* WFI 1111 0011 1010 xxxx 10x0 x000 0000 0011 */
251 DECODE_SIMULATE (0xfff0d7fc, 0xf3a08000, kprobe_simulate_nop),
253 /* MRS Rd, CPSR 1111 0011 1110 xxxx 10x0 xxxx xxxx xxxx */
254 DECODE_SIMULATEX(0xfff0d000, 0xf3e08000, t32_simulate_mrs,
255 REGS(0, 0, NOSPPC, 0, 0)),
258 * Unsupported instructions
259 * 1111 0x11 1xxx xxxx 10x0 xxxx xxxx xxxx
261 * MSR 1111 0011 100x xxxx 10x0 xxxx xxxx xxxx
262 * DBG hint 1111 0011 1010 xxxx 10x0 x000 1111 xxxx
263 * Unallocated hints 1111 0011 1010 xxxx 10x0 x000 xxxx xxxx
264 * CPS 1111 0011 1010 xxxx 10x0 xxxx xxxx xxxx
265 * CLREX/DSB/DMB/ISB 1111 0011 1011 xxxx 10x0 xxxx xxxx xxxx
266 * BXJ 1111 0011 1100 xxxx 10x0 xxxx xxxx xxxx
267 * SUBS PC,LR,#<imm8> 1111 0011 1101 xxxx 10x0 xxxx xxxx xxxx
268 * MRS Rd, SPSR 1111 0011 1111 xxxx 10x0 xxxx xxxx xxxx
269 * SMC 1111 0111 1111 xxxx 1000 xxxx xxxx xxxx
270 * UNDEFINED 1111 0111 1111 xxxx 1010 xxxx xxxx xxxx
271 * ??? 1111 0111 1xxx xxxx 1010 xxxx xxxx xxxx
273 DECODE_REJECT (0xfb80d000, 0xf3808000),
275 /* Bcc 1111 0xxx xxxx xxxx 10x0 xxxx xxxx xxxx */
276 DECODE_CUSTOM (0xf800d000, 0xf0008000, t32_decode_cond_branch),
278 /* BLX 1111 0xxx xxxx xxxx 11x0 xxxx xxxx xxx0 */
279 DECODE_OR (0xf800d001, 0xf000c000),
280 /* B 1111 0xxx xxxx xxxx 10x1 xxxx xxxx xxxx */
281 /* BL 1111 0xxx xxxx xxxx 11x1 xxxx xxxx xxxx */
282 DECODE_SIMULATE (0xf8009000, 0xf0009000, t32_simulate_branch),
287 static const union decode_item t32_table_1111_100x_x0x1__1111[] = {
290 /* PLD (literal) 1111 1000 x001 1111 1111 xxxx xxxx xxxx */
291 /* PLI (literal) 1111 1001 x001 1111 1111 xxxx xxxx xxxx */
292 DECODE_SIMULATE (0xfe7ff000, 0xf81ff000, kprobe_simulate_nop),
294 /* PLD{W} (immediate) 1111 1000 10x1 xxxx 1111 xxxx xxxx xxxx */
295 DECODE_OR (0xffd0f000, 0xf890f000),
296 /* PLD{W} (immediate) 1111 1000 00x1 xxxx 1111 1100 xxxx xxxx */
297 DECODE_OR (0xffd0ff00, 0xf810fc00),
298 /* PLI (immediate) 1111 1001 1001 xxxx 1111 xxxx xxxx xxxx */
299 DECODE_OR (0xfff0f000, 0xf990f000),
300 /* PLI (immediate) 1111 1001 0001 xxxx 1111 1100 xxxx xxxx */
301 DECODE_SIMULATEX(0xfff0ff00, 0xf910fc00, kprobe_simulate_nop,
302 REGS(NOPCX, 0, 0, 0, 0)),
304 /* PLD{W} (register) 1111 1000 00x1 xxxx 1111 0000 00xx xxxx */
305 DECODE_OR (0xffd0ffc0, 0xf810f000),
306 /* PLI (register) 1111 1001 0001 xxxx 1111 0000 00xx xxxx */
307 DECODE_SIMULATEX(0xfff0ffc0, 0xf910f000, kprobe_simulate_nop,
308 REGS(NOPCX, 0, 0, 0, NOSPPC)),
310 /* Other unallocated instructions... */
314 static const union decode_item t32_table_1111_100x[] = {
315 /* Store/Load single data item */
317 /* ??? 1111 100x x11x xxxx xxxx xxxx xxxx xxxx */
318 DECODE_REJECT (0xfe600000, 0xf8600000),
320 /* ??? 1111 1001 0101 xxxx xxxx xxxx xxxx xxxx */
321 DECODE_REJECT (0xfff00000, 0xf9500000),
323 /* ??? 1111 100x 0xxx xxxx xxxx 10x0 xxxx xxxx */
324 DECODE_REJECT (0xfe800d00, 0xf8000800),
326 /* STRBT 1111 1000 0000 xxxx xxxx 1110 xxxx xxxx */
327 /* STRHT 1111 1000 0010 xxxx xxxx 1110 xxxx xxxx */
328 /* STRT 1111 1000 0100 xxxx xxxx 1110 xxxx xxxx */
329 /* LDRBT 1111 1000 0001 xxxx xxxx 1110 xxxx xxxx */
330 /* LDRSBT 1111 1001 0001 xxxx xxxx 1110 xxxx xxxx */
331 /* LDRHT 1111 1000 0011 xxxx xxxx 1110 xxxx xxxx */
332 /* LDRSHT 1111 1001 0011 xxxx xxxx 1110 xxxx xxxx */
333 /* LDRT 1111 1000 0101 xxxx xxxx 1110 xxxx xxxx */
334 DECODE_REJECT (0xfe800f00, 0xf8000e00),
336 /* STR{,B,H} Rn,[PC...] 1111 1000 xxx0 1111 xxxx xxxx xxxx xxxx */
337 DECODE_REJECT (0xff1f0000, 0xf80f0000),
339 /* STR{,B,H} PC,[Rn...] 1111 1000 xxx0 xxxx 1111 xxxx xxxx xxxx */
340 DECODE_REJECT (0xff10f000, 0xf800f000),
342 /* LDR (literal) 1111 1000 x101 1111 xxxx xxxx xxxx xxxx */
343 DECODE_SIMULATEX(0xff7f0000, 0xf85f0000, t32_simulate_ldr_literal,
344 REGS(PC, ANY, 0, 0, 0)),
346 /* STR (immediate) 1111 1000 0100 xxxx xxxx 1xxx xxxx xxxx */
347 /* LDR (immediate) 1111 1000 0101 xxxx xxxx 1xxx xxxx xxxx */
348 DECODE_OR (0xffe00800, 0xf8400800),
349 /* STR (immediate) 1111 1000 1100 xxxx xxxx xxxx xxxx xxxx */
350 /* LDR (immediate) 1111 1000 1101 xxxx xxxx xxxx xxxx xxxx */
351 DECODE_EMULATEX (0xffe00000, 0xf8c00000, t32_emulate_ldrstr,
352 REGS(NOPCX, ANY, 0, 0, 0)),
354 /* STR (register) 1111 1000 0100 xxxx xxxx 0000 00xx xxxx */
355 /* LDR (register) 1111 1000 0101 xxxx xxxx 0000 00xx xxxx */
356 DECODE_EMULATEX (0xffe00fc0, 0xf8400000, t32_emulate_ldrstr,
357 REGS(NOPCX, ANY, 0, 0, NOSPPC)),
359 /* LDRB (literal) 1111 1000 x001 1111 xxxx xxxx xxxx xxxx */
360 /* LDRSB (literal) 1111 1001 x001 1111 xxxx xxxx xxxx xxxx */
361 /* LDRH (literal) 1111 1000 x011 1111 xxxx xxxx xxxx xxxx */
362 /* LDRSH (literal) 1111 1001 x011 1111 xxxx xxxx xxxx xxxx */
363 DECODE_SIMULATEX(0xfe5f0000, 0xf81f0000, t32_simulate_ldr_literal,
364 REGS(PC, NOSPPCX, 0, 0, 0)),
366 /* STRB (immediate) 1111 1000 0000 xxxx xxxx 1xxx xxxx xxxx */
367 /* STRH (immediate) 1111 1000 0010 xxxx xxxx 1xxx xxxx xxxx */
368 /* LDRB (immediate) 1111 1000 0001 xxxx xxxx 1xxx xxxx xxxx */
369 /* LDRSB (immediate) 1111 1001 0001 xxxx xxxx 1xxx xxxx xxxx */
370 /* LDRH (immediate) 1111 1000 0011 xxxx xxxx 1xxx xxxx xxxx */
371 /* LDRSH (immediate) 1111 1001 0011 xxxx xxxx 1xxx xxxx xxxx */
372 DECODE_OR (0xfec00800, 0xf8000800),
373 /* STRB (immediate) 1111 1000 1000 xxxx xxxx xxxx xxxx xxxx */
374 /* STRH (immediate) 1111 1000 1010 xxxx xxxx xxxx xxxx xxxx */
375 /* LDRB (immediate) 1111 1000 1001 xxxx xxxx xxxx xxxx xxxx */
376 /* LDRSB (immediate) 1111 1001 1001 xxxx xxxx xxxx xxxx xxxx */
377 /* LDRH (immediate) 1111 1000 1011 xxxx xxxx xxxx xxxx xxxx */
378 /* LDRSH (immediate) 1111 1001 1011 xxxx xxxx xxxx xxxx xxxx */
379 DECODE_EMULATEX (0xfec00000, 0xf8800000, t32_emulate_ldrstr,
380 REGS(NOPCX, NOSPPCX, 0, 0, 0)),
382 /* STRB (register) 1111 1000 0000 xxxx xxxx 0000 00xx xxxx */
383 /* STRH (register) 1111 1000 0010 xxxx xxxx 0000 00xx xxxx */
384 /* LDRB (register) 1111 1000 0001 xxxx xxxx 0000 00xx xxxx */
385 /* LDRSB (register) 1111 1001 0001 xxxx xxxx 0000 00xx xxxx */
386 /* LDRH (register) 1111 1000 0011 xxxx xxxx 0000 00xx xxxx */
387 /* LDRSH (register) 1111 1001 0011 xxxx xxxx 0000 00xx xxxx */
388 DECODE_EMULATEX (0xfe800fc0, 0xf8000000, t32_emulate_ldrstr,
389 REGS(NOPCX, NOSPPCX, 0, 0, NOSPPC)),
391 /* Other unallocated instructions... */
395 static const union decode_item t32_table_1111_1010___1111[] = {
396 /* Data-processing (register) */
398 /* ??? 1111 1010 011x xxxx 1111 xxxx 1xxx xxxx */
399 DECODE_REJECT (0xffe0f080, 0xfa60f080),
401 /* SXTH 1111 1010 0000 1111 1111 xxxx 1xxx xxxx */
402 /* UXTH 1111 1010 0001 1111 1111 xxxx 1xxx xxxx */
403 /* SXTB16 1111 1010 0010 1111 1111 xxxx 1xxx xxxx */
404 /* UXTB16 1111 1010 0011 1111 1111 xxxx 1xxx xxxx */
405 /* SXTB 1111 1010 0100 1111 1111 xxxx 1xxx xxxx */
406 /* UXTB 1111 1010 0101 1111 1111 xxxx 1xxx xxxx */
407 DECODE_EMULATEX (0xff8ff080, 0xfa0ff080, t32_emulate_rd8rn16rm0_rwflags,
408 REGS(0, 0, NOSPPC, 0, NOSPPC)),
411 /* ??? 1111 1010 1xxx xxxx 1111 xxxx 0x11 xxxx */
412 DECODE_REJECT (0xff80f0b0, 0xfa80f030),
413 /* ??? 1111 1010 1x11 xxxx 1111 xxxx 0xxx xxxx */
414 DECODE_REJECT (0xffb0f080, 0xfab0f000),
416 /* SADD16 1111 1010 1001 xxxx 1111 xxxx 0000 xxxx */
417 /* SASX 1111 1010 1010 xxxx 1111 xxxx 0000 xxxx */
418 /* SSAX 1111 1010 1110 xxxx 1111 xxxx 0000 xxxx */
419 /* SSUB16 1111 1010 1101 xxxx 1111 xxxx 0000 xxxx */
420 /* SADD8 1111 1010 1000 xxxx 1111 xxxx 0000 xxxx */
421 /* SSUB8 1111 1010 1100 xxxx 1111 xxxx 0000 xxxx */
423 /* QADD16 1111 1010 1001 xxxx 1111 xxxx 0001 xxxx */
424 /* QASX 1111 1010 1010 xxxx 1111 xxxx 0001 xxxx */
425 /* QSAX 1111 1010 1110 xxxx 1111 xxxx 0001 xxxx */
426 /* QSUB16 1111 1010 1101 xxxx 1111 xxxx 0001 xxxx */
427 /* QADD8 1111 1010 1000 xxxx 1111 xxxx 0001 xxxx */
428 /* QSUB8 1111 1010 1100 xxxx 1111 xxxx 0001 xxxx */
430 /* SHADD16 1111 1010 1001 xxxx 1111 xxxx 0010 xxxx */
431 /* SHASX 1111 1010 1010 xxxx 1111 xxxx 0010 xxxx */
432 /* SHSAX 1111 1010 1110 xxxx 1111 xxxx 0010 xxxx */
433 /* SHSUB16 1111 1010 1101 xxxx 1111 xxxx 0010 xxxx */
434 /* SHADD8 1111 1010 1000 xxxx 1111 xxxx 0010 xxxx */
435 /* SHSUB8 1111 1010 1100 xxxx 1111 xxxx 0010 xxxx */
437 /* UADD16 1111 1010 1001 xxxx 1111 xxxx 0100 xxxx */
438 /* UASX 1111 1010 1010 xxxx 1111 xxxx 0100 xxxx */
439 /* USAX 1111 1010 1110 xxxx 1111 xxxx 0100 xxxx */
440 /* USUB16 1111 1010 1101 xxxx 1111 xxxx 0100 xxxx */
441 /* UADD8 1111 1010 1000 xxxx 1111 xxxx 0100 xxxx */
442 /* USUB8 1111 1010 1100 xxxx 1111 xxxx 0100 xxxx */
444 /* UQADD16 1111 1010 1001 xxxx 1111 xxxx 0101 xxxx */
445 /* UQASX 1111 1010 1010 xxxx 1111 xxxx 0101 xxxx */
446 /* UQSAX 1111 1010 1110 xxxx 1111 xxxx 0101 xxxx */
447 /* UQSUB16 1111 1010 1101 xxxx 1111 xxxx 0101 xxxx */
448 /* UQADD8 1111 1010 1000 xxxx 1111 xxxx 0101 xxxx */
449 /* UQSUB8 1111 1010 1100 xxxx 1111 xxxx 0101 xxxx */
451 /* UHADD16 1111 1010 1001 xxxx 1111 xxxx 0110 xxxx */
452 /* UHASX 1111 1010 1010 xxxx 1111 xxxx 0110 xxxx */
453 /* UHSAX 1111 1010 1110 xxxx 1111 xxxx 0110 xxxx */
454 /* UHSUB16 1111 1010 1101 xxxx 1111 xxxx 0110 xxxx */
455 /* UHADD8 1111 1010 1000 xxxx 1111 xxxx 0110 xxxx */
456 /* UHSUB8 1111 1010 1100 xxxx 1111 xxxx 0110 xxxx */
457 DECODE_OR (0xff80f080, 0xfa80f000),
459 /* SXTAH 1111 1010 0000 xxxx 1111 xxxx 1xxx xxxx */
460 /* UXTAH 1111 1010 0001 xxxx 1111 xxxx 1xxx xxxx */
461 /* SXTAB16 1111 1010 0010 xxxx 1111 xxxx 1xxx xxxx */
462 /* UXTAB16 1111 1010 0011 xxxx 1111 xxxx 1xxx xxxx */
463 /* SXTAB 1111 1010 0100 xxxx 1111 xxxx 1xxx xxxx */
464 /* UXTAB 1111 1010 0101 xxxx 1111 xxxx 1xxx xxxx */
465 DECODE_OR (0xff80f080, 0xfa00f080),
467 /* QADD 1111 1010 1000 xxxx 1111 xxxx 1000 xxxx */
468 /* QDADD 1111 1010 1000 xxxx 1111 xxxx 1001 xxxx */
469 /* QSUB 1111 1010 1000 xxxx 1111 xxxx 1010 xxxx */
470 /* QDSUB 1111 1010 1000 xxxx 1111 xxxx 1011 xxxx */
471 DECODE_OR (0xfff0f0c0, 0xfa80f080),
473 /* SEL 1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
474 DECODE_OR (0xfff0f0f0, 0xfaa0f080),
476 /* LSL 1111 1010 000x xxxx 1111 xxxx 0000 xxxx */
477 /* LSR 1111 1010 001x xxxx 1111 xxxx 0000 xxxx */
478 /* ASR 1111 1010 010x xxxx 1111 xxxx 0000 xxxx */
479 /* ROR 1111 1010 011x xxxx 1111 xxxx 0000 xxxx */
480 DECODE_EMULATEX (0xff80f0f0, 0xfa00f000, t32_emulate_rd8rn16rm0_rwflags,
481 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
483 /* CLZ 1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
484 DECODE_OR (0xfff0f0f0, 0xfab0f080),
486 /* REV 1111 1010 1001 xxxx 1111 xxxx 1000 xxxx */
487 /* REV16 1111 1010 1001 xxxx 1111 xxxx 1001 xxxx */
488 /* RBIT 1111 1010 1001 xxxx 1111 xxxx 1010 xxxx */
489 /* REVSH 1111 1010 1001 xxxx 1111 xxxx 1011 xxxx */
490 DECODE_EMULATEX (0xfff0f0c0, 0xfa90f080, t32_emulate_rd8rn16_noflags,
491 REGS(NOSPPC, 0, NOSPPC, 0, SAMEAS16)),
493 /* Other unallocated instructions... */
497 static const union decode_item t32_table_1111_1011_0[] = {
498 /* Multiply, multiply accumulate, and absolute difference */
500 /* ??? 1111 1011 0000 xxxx 1111 xxxx 0001 xxxx */
501 DECODE_REJECT (0xfff0f0f0, 0xfb00f010),
502 /* ??? 1111 1011 0111 xxxx 1111 xxxx 0001 xxxx */
503 DECODE_REJECT (0xfff0f0f0, 0xfb70f010),
505 /* SMULxy 1111 1011 0001 xxxx 1111 xxxx 00xx xxxx */
506 DECODE_OR (0xfff0f0c0, 0xfb10f000),
507 /* MUL 1111 1011 0000 xxxx 1111 xxxx 0000 xxxx */
508 /* SMUAD{X} 1111 1011 0010 xxxx 1111 xxxx 000x xxxx */
509 /* SMULWy 1111 1011 0011 xxxx 1111 xxxx 000x xxxx */
510 /* SMUSD{X} 1111 1011 0100 xxxx 1111 xxxx 000x xxxx */
511 /* SMMUL{R} 1111 1011 0101 xxxx 1111 xxxx 000x xxxx */
512 /* USAD8 1111 1011 0111 xxxx 1111 xxxx 0000 xxxx */
513 DECODE_EMULATEX (0xff80f0e0, 0xfb00f000, t32_emulate_rd8rn16rm0_rwflags,
514 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
516 /* ??? 1111 1011 0111 xxxx xxxx xxxx 0001 xxxx */
517 DECODE_REJECT (0xfff000f0, 0xfb700010),
519 /* SMLAxy 1111 1011 0001 xxxx xxxx xxxx 00xx xxxx */
520 DECODE_OR (0xfff000c0, 0xfb100000),
521 /* MLA 1111 1011 0000 xxxx xxxx xxxx 0000 xxxx */
522 /* MLS 1111 1011 0000 xxxx xxxx xxxx 0001 xxxx */
523 /* SMLAD{X} 1111 1011 0010 xxxx xxxx xxxx 000x xxxx */
524 /* SMLAWy 1111 1011 0011 xxxx xxxx xxxx 000x xxxx */
525 /* SMLSD{X} 1111 1011 0100 xxxx xxxx xxxx 000x xxxx */
526 /* SMMLA{R} 1111 1011 0101 xxxx xxxx xxxx 000x xxxx */
527 /* SMMLS{R} 1111 1011 0110 xxxx xxxx xxxx 000x xxxx */
528 /* USADA8 1111 1011 0111 xxxx xxxx xxxx 0000 xxxx */
529 DECODE_EMULATEX (0xff8000c0, 0xfb000000, t32_emulate_rd8rn16rm0ra12_noflags,
530 REGS(NOSPPC, NOSPPCX, NOSPPC, 0, NOSPPC)),
532 /* Other unallocated instructions... */
536 static const union decode_item t32_table_1111_1011_1[] = {
537 /* Long multiply, long multiply accumulate, and divide */
539 /* UMAAL 1111 1011 1110 xxxx xxxx xxxx 0110 xxxx */
540 DECODE_OR (0xfff000f0, 0xfbe00060),
541 /* SMLALxy 1111 1011 1100 xxxx xxxx xxxx 10xx xxxx */
542 DECODE_OR (0xfff000c0, 0xfbc00080),
543 /* SMLALD{X} 1111 1011 1100 xxxx xxxx xxxx 110x xxxx */
544 /* SMLSLD{X} 1111 1011 1101 xxxx xxxx xxxx 110x xxxx */
545 DECODE_OR (0xffe000e0, 0xfbc000c0),
546 /* SMULL 1111 1011 1000 xxxx xxxx xxxx 0000 xxxx */
547 /* UMULL 1111 1011 1010 xxxx xxxx xxxx 0000 xxxx */
548 /* SMLAL 1111 1011 1100 xxxx xxxx xxxx 0000 xxxx */
549 /* UMLAL 1111 1011 1110 xxxx xxxx xxxx 0000 xxxx */
550 DECODE_EMULATEX (0xff9000f0, 0xfb800000, t32_emulate_rdlo12rdhi8rn16rm0_noflags,
551 REGS(NOSPPC, NOSPPC, NOSPPC, 0, NOSPPC)),
553 /* SDIV 1111 1011 1001 xxxx xxxx xxxx 1111 xxxx */
554 /* UDIV 1111 1011 1011 xxxx xxxx xxxx 1111 xxxx */
555 /* Other unallocated instructions... */
559 const union decode_item kprobe_decode_thumb32_table[] = {
562 * Load/store multiple instructions
563 * 1110 100x x0xx xxxx xxxx xxxx xxxx xxxx
565 DECODE_TABLE (0xfe400000, 0xe8000000, t32_table_1110_100x_x0xx),
568 * Load/store dual, load/store exclusive, table branch
569 * 1110 100x x1xx xxxx xxxx xxxx xxxx xxxx
571 DECODE_TABLE (0xfe400000, 0xe8400000, t32_table_1110_100x_x1xx),
574 * Data-processing (shifted register)
575 * 1110 101x xxxx xxxx xxxx xxxx xxxx xxxx
577 DECODE_TABLE (0xfe000000, 0xea000000, t32_table_1110_101x),
580 * Coprocessor instructions
581 * 1110 11xx xxxx xxxx xxxx xxxx xxxx xxxx
583 DECODE_REJECT (0xfc000000, 0xec000000),
586 * Data-processing (modified immediate)
587 * 1111 0x0x xxxx xxxx 0xxx xxxx xxxx xxxx
589 DECODE_TABLE (0xfa008000, 0xf0000000, t32_table_1111_0x0x___0),
592 * Data-processing (plain binary immediate)
593 * 1111 0x1x xxxx xxxx 0xxx xxxx xxxx xxxx
595 DECODE_TABLE (0xfa008000, 0xf2000000, t32_table_1111_0x1x___0),
598 * Branches and miscellaneous control
599 * 1111 0xxx xxxx xxxx 1xxx xxxx xxxx xxxx
601 DECODE_TABLE (0xf8008000, 0xf0008000, t32_table_1111_0xxx___1),
604 * Advanced SIMD element or structure load/store instructions
605 * 1111 1001 xxx0 xxxx xxxx xxxx xxxx xxxx
607 DECODE_REJECT (0xff100000, 0xf9000000),
611 * 1111 100x x0x1 xxxx 1111 xxxx xxxx xxxx
613 DECODE_TABLE (0xfe50f000, 0xf810f000, t32_table_1111_100x_x0x1__1111),
616 * Store single data item
617 * 1111 1000 xxx0 xxxx xxxx xxxx xxxx xxxx
618 * Load single data items
619 * 1111 100x xxx1 xxxx xxxx xxxx xxxx xxxx
621 DECODE_TABLE (0xfe000000, 0xf8000000, t32_table_1111_100x),
624 * Data-processing (register)
625 * 1111 1010 xxxx xxxx 1111 xxxx xxxx xxxx
627 DECODE_TABLE (0xff00f000, 0xfa00f000, t32_table_1111_1010___1111),
630 * Multiply, multiply accumulate, and absolute difference
631 * 1111 1011 0xxx xxxx xxxx xxxx xxxx xxxx
633 DECODE_TABLE (0xff800000, 0xfb000000, t32_table_1111_1011_0),
636 * Long multiply, long multiply accumulate, and divide
637 * 1111 1011 1xxx xxxx xxxx xxxx xxxx xxxx
639 DECODE_TABLE (0xff800000, 0xfb800000, t32_table_1111_1011_1),
642 * Coprocessor instructions
643 * 1111 11xx xxxx xxxx xxxx xxxx xxxx xxxx
647 #ifdef CONFIG_ARM_KPROBES_TEST_MODULE
648 EXPORT_SYMBOL_GPL(kprobe_decode_thumb32_table);
651 static const union decode_item t16_table_1011[] = {
652 /* Miscellaneous 16-bit instructions */
654 /* ADD (SP plus immediate) 1011 0000 0xxx xxxx */
655 /* SUB (SP minus immediate) 1011 0000 1xxx xxxx */
656 DECODE_SIMULATE (0xff00, 0xb000, t16_simulate_add_sp_imm),
658 /* CBZ 1011 00x1 xxxx xxxx */
659 /* CBNZ 1011 10x1 xxxx xxxx */
660 DECODE_SIMULATE (0xf500, 0xb100, t16_simulate_cbz),
662 /* SXTH 1011 0010 00xx xxxx */
663 /* SXTB 1011 0010 01xx xxxx */
664 /* UXTH 1011 0010 10xx xxxx */
665 /* UXTB 1011 0010 11xx xxxx */
666 /* REV 1011 1010 00xx xxxx */
667 /* REV16 1011 1010 01xx xxxx */
668 /* ??? 1011 1010 10xx xxxx */
669 /* REVSH 1011 1010 11xx xxxx */
670 DECODE_REJECT (0xffc0, 0xba80),
671 DECODE_EMULATE (0xf500, 0xb000, t16_emulate_loregs_rwflags),
673 /* PUSH 1011 010x xxxx xxxx */
674 DECODE_CUSTOM (0xfe00, 0xb400, t16_decode_push),
675 /* POP 1011 110x xxxx xxxx */
676 DECODE_CUSTOM (0xfe00, 0xbc00, t16_decode_pop),
680 * 1011 1111 xxxx xxxx
683 /* YIELD 1011 1111 0001 0000 */
684 DECODE_OR (0xffff, 0xbf10),
685 /* SEV 1011 1111 0100 0000 */
686 DECODE_EMULATE (0xffff, 0xbf40, kprobe_emulate_none),
687 /* NOP 1011 1111 0000 0000 */
688 /* WFE 1011 1111 0010 0000 */
689 /* WFI 1011 1111 0011 0000 */
690 DECODE_SIMULATE (0xffcf, 0xbf00, kprobe_simulate_nop),
691 /* Unassigned hints 1011 1111 xxxx 0000 */
692 DECODE_REJECT (0xff0f, 0xbf00),
693 /* IT 1011 1111 xxxx xxxx */
694 DECODE_CUSTOM (0xff00, 0xbf00, t16_decode_it),
696 /* SETEND 1011 0110 010x xxxx */
697 /* CPS 1011 0110 011x xxxx */
698 /* BKPT 1011 1110 xxxx xxxx */
699 /* And unallocated instructions... */
703 const union decode_item kprobe_decode_thumb16_table[] = {
706 * Shift (immediate), add, subtract, move, and compare
707 * 00xx xxxx xxxx xxxx
710 /* CMP (immediate) 0010 1xxx xxxx xxxx */
711 DECODE_EMULATE (0xf800, 0x2800, t16_emulate_loregs_rwflags),
713 /* ADD (register) 0001 100x xxxx xxxx */
714 /* SUB (register) 0001 101x xxxx xxxx */
715 /* LSL (immediate) 0000 0xxx xxxx xxxx */
716 /* LSR (immediate) 0000 1xxx xxxx xxxx */
717 /* ASR (immediate) 0001 0xxx xxxx xxxx */
718 /* ADD (immediate, Thumb) 0001 110x xxxx xxxx */
719 /* SUB (immediate, Thumb) 0001 111x xxxx xxxx */
720 /* MOV (immediate) 0010 0xxx xxxx xxxx */
721 /* ADD (immediate, Thumb) 0011 0xxx xxxx xxxx */
722 /* SUB (immediate, Thumb) 0011 1xxx xxxx xxxx */
723 DECODE_EMULATE (0xc000, 0x0000, t16_emulate_loregs_noitrwflags),
726 * 16-bit Thumb data-processing instructions
727 * 0100 00xx xxxx xxxx
730 /* TST (register) 0100 0010 00xx xxxx */
731 DECODE_EMULATE (0xffc0, 0x4200, t16_emulate_loregs_rwflags),
732 /* CMP (register) 0100 0010 10xx xxxx */
733 /* CMN (register) 0100 0010 11xx xxxx */
734 DECODE_EMULATE (0xff80, 0x4280, t16_emulate_loregs_rwflags),
735 /* AND (register) 0100 0000 00xx xxxx */
736 /* EOR (register) 0100 0000 01xx xxxx */
737 /* LSL (register) 0100 0000 10xx xxxx */
738 /* LSR (register) 0100 0000 11xx xxxx */
739 /* ASR (register) 0100 0001 00xx xxxx */
740 /* ADC (register) 0100 0001 01xx xxxx */
741 /* SBC (register) 0100 0001 10xx xxxx */
742 /* ROR (register) 0100 0001 11xx xxxx */
743 /* RSB (immediate) 0100 0010 01xx xxxx */
744 /* ORR (register) 0100 0011 00xx xxxx */
745 /* MUL 0100 0011 00xx xxxx */
746 /* BIC (register) 0100 0011 10xx xxxx */
747 /* MVN (register) 0100 0011 10xx xxxx */
748 DECODE_EMULATE (0xfc00, 0x4000, t16_emulate_loregs_noitrwflags),
751 * Special data instructions and branch and exchange
752 * 0100 01xx xxxx xxxx
755 /* BLX pc 0100 0111 1111 1xxx */
756 DECODE_REJECT (0xfff8, 0x47f8),
758 /* BX (register) 0100 0111 0xxx xxxx */
759 /* BLX (register) 0100 0111 1xxx xxxx */
760 DECODE_SIMULATE (0xff00, 0x4700, t16_simulate_bxblx),
762 /* ADD pc, pc 0100 0100 1111 1111 */
763 DECODE_REJECT (0xffff, 0x44ff),
765 /* ADD (register) 0100 0100 xxxx xxxx */
766 /* CMP (register) 0100 0101 xxxx xxxx */
767 /* MOV (register) 0100 0110 xxxx xxxx */
768 DECODE_CUSTOM (0xfc00, 0x4400, t16_decode_hiregs),
771 * Load from Literal Pool
772 * LDR (literal) 0100 1xxx xxxx xxxx
774 DECODE_SIMULATE (0xf800, 0x4800, t16_simulate_ldr_literal),
777 * 16-bit Thumb Load/store instructions
778 * 0101 xxxx xxxx xxxx
779 * 011x xxxx xxxx xxxx
780 * 100x xxxx xxxx xxxx
783 /* STR (register) 0101 000x xxxx xxxx */
784 /* STRH (register) 0101 001x xxxx xxxx */
785 /* STRB (register) 0101 010x xxxx xxxx */
786 /* LDRSB (register) 0101 011x xxxx xxxx */
787 /* LDR (register) 0101 100x xxxx xxxx */
788 /* LDRH (register) 0101 101x xxxx xxxx */
789 /* LDRB (register) 0101 110x xxxx xxxx */
790 /* LDRSH (register) 0101 111x xxxx xxxx */
791 /* STR (immediate, Thumb) 0110 0xxx xxxx xxxx */
792 /* LDR (immediate, Thumb) 0110 1xxx xxxx xxxx */
793 /* STRB (immediate, Thumb) 0111 0xxx xxxx xxxx */
794 /* LDRB (immediate, Thumb) 0111 1xxx xxxx xxxx */
795 DECODE_EMULATE (0xc000, 0x4000, t16_emulate_loregs_rwflags),
796 /* STRH (immediate, Thumb) 1000 0xxx xxxx xxxx */
797 /* LDRH (immediate, Thumb) 1000 1xxx xxxx xxxx */
798 DECODE_EMULATE (0xf000, 0x8000, t16_emulate_loregs_rwflags),
799 /* STR (immediate, Thumb) 1001 0xxx xxxx xxxx */
800 /* LDR (immediate, Thumb) 1001 1xxx xxxx xxxx */
801 DECODE_SIMULATE (0xf000, 0x9000, t16_simulate_ldrstr_sp_relative),
804 * Generate PC-/SP-relative address
805 * ADR (literal) 1010 0xxx xxxx xxxx
806 * ADD (SP plus immediate) 1010 1xxx xxxx xxxx
808 DECODE_SIMULATE (0xf000, 0xa000, t16_simulate_reladr),
811 * Miscellaneous 16-bit instructions
812 * 1011 xxxx xxxx xxxx
814 DECODE_TABLE (0xf000, 0xb000, t16_table_1011),
816 /* STM 1100 0xxx xxxx xxxx */
817 /* LDM 1100 1xxx xxxx xxxx */
818 DECODE_EMULATE (0xf000, 0xc000, t16_emulate_loregs_rwflags),
821 * Conditional branch, and Supervisor Call
824 /* Permanently UNDEFINED 1101 1110 xxxx xxxx */
825 /* SVC 1101 1111 xxxx xxxx */
826 DECODE_REJECT (0xfe00, 0xde00),
828 /* Conditional branch 1101 xxxx xxxx xxxx */
829 DECODE_CUSTOM (0xf000, 0xd000, t16_decode_cond_branch),
832 * Unconditional branch
833 * B 1110 0xxx xxxx xxxx
835 DECODE_SIMULATE (0xf800, 0xe000, t16_simulate_branch),
839 #ifdef CONFIG_ARM_KPROBES_TEST_MODULE
840 EXPORT_SYMBOL_GPL(kprobe_decode_thumb16_table);
843 static unsigned long __kprobes thumb_check_cc(unsigned long cpsr)
845 if (unlikely(in_it_block(cpsr)))
846 return kprobe_condition_checks[current_cond(cpsr)](cpsr);
850 static void __kprobes thumb16_singlestep(struct kprobe *p, struct pt_regs *regs)
853 p->ainsn.insn_handler(p, regs);
854 regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
857 static void __kprobes thumb32_singlestep(struct kprobe *p, struct pt_regs *regs)
860 p->ainsn.insn_handler(p, regs);
861 regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
864 enum kprobe_insn __kprobes
865 thumb16_kprobe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi)
867 asi->insn_singlestep = thumb16_singlestep;
868 asi->insn_check_cc = thumb_check_cc;
869 return kprobe_decode_insn(insn, asi, kprobe_decode_thumb16_table, true);
872 enum kprobe_insn __kprobes
873 thumb32_kprobe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi)
875 asi->insn_singlestep = thumb32_singlestep;
876 asi->insn_check_cc = thumb_check_cc;
877 return kprobe_decode_insn(insn, asi, kprobe_decode_thumb32_table, true);