cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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decode-thumb.c (32328B)


      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * arch/arm/probes/decode-thumb.c
      4 *
      5 * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
      6 */
      7
      8#include <linux/stddef.h>
      9#include <linux/kernel.h>
     10#include <linux/module.h>
     11
     12#include "decode.h"
     13#include "decode-thumb.h"
     14
     15
     16static const union decode_item t32_table_1110_100x_x0xx[] = {
     17	/* Load/store multiple instructions */
     18
     19	/* Rn is PC		1110 100x x0xx 1111 xxxx xxxx xxxx xxxx */
     20	DECODE_REJECT	(0xfe4f0000, 0xe80f0000),
     21
     22	/* SRS			1110 1000 00x0 xxxx xxxx xxxx xxxx xxxx */
     23	/* RFE			1110 1000 00x1 xxxx xxxx xxxx xxxx xxxx */
     24	DECODE_REJECT	(0xffc00000, 0xe8000000),
     25	/* SRS			1110 1001 10x0 xxxx xxxx xxxx xxxx xxxx */
     26	/* RFE			1110 1001 10x1 xxxx xxxx xxxx xxxx xxxx */
     27	DECODE_REJECT	(0xffc00000, 0xe9800000),
     28
     29	/* STM Rn, {...pc}	1110 100x x0x0 xxxx 1xxx xxxx xxxx xxxx */
     30	DECODE_REJECT	(0xfe508000, 0xe8008000),
     31	/* LDM Rn, {...lr,pc}	1110 100x x0x1 xxxx 11xx xxxx xxxx xxxx */
     32	DECODE_REJECT	(0xfe50c000, 0xe810c000),
     33	/* LDM/STM Rn, {...sp}	1110 100x x0xx xxxx xx1x xxxx xxxx xxxx */
     34	DECODE_REJECT	(0xfe402000, 0xe8002000),
     35
     36	/* STMIA		1110 1000 10x0 xxxx xxxx xxxx xxxx xxxx */
     37	/* LDMIA		1110 1000 10x1 xxxx xxxx xxxx xxxx xxxx */
     38	/* STMDB		1110 1001 00x0 xxxx xxxx xxxx xxxx xxxx */
     39	/* LDMDB		1110 1001 00x1 xxxx xxxx xxxx xxxx xxxx */
     40	DECODE_CUSTOM	(0xfe400000, 0xe8000000, PROBES_T32_LDMSTM),
     41
     42	DECODE_END
     43};
     44
     45static const union decode_item t32_table_1110_100x_x1xx[] = {
     46	/* Load/store dual, load/store exclusive, table branch */
     47
     48	/* STRD (immediate)	1110 1000 x110 xxxx xxxx xxxx xxxx xxxx */
     49	/* LDRD (immediate)	1110 1000 x111 xxxx xxxx xxxx xxxx xxxx */
     50	DECODE_OR	(0xff600000, 0xe8600000),
     51	/* STRD (immediate)	1110 1001 x1x0 xxxx xxxx xxxx xxxx xxxx */
     52	/* LDRD (immediate)	1110 1001 x1x1 xxxx xxxx xxxx xxxx xxxx */
     53	DECODE_EMULATEX	(0xff400000, 0xe9400000, PROBES_T32_LDRDSTRD,
     54						 REGS(NOPCWB, NOSPPC, NOSPPC, 0, 0)),
     55
     56	/* TBB			1110 1000 1101 xxxx xxxx xxxx 0000 xxxx */
     57	/* TBH			1110 1000 1101 xxxx xxxx xxxx 0001 xxxx */
     58	DECODE_SIMULATEX(0xfff000e0, 0xe8d00000, PROBES_T32_TABLE_BRANCH,
     59						 REGS(NOSP, 0, 0, 0, NOSPPC)),
     60
     61	/* STREX		1110 1000 0100 xxxx xxxx xxxx xxxx xxxx */
     62	/* LDREX		1110 1000 0101 xxxx xxxx xxxx xxxx xxxx */
     63	/* STREXB		1110 1000 1100 xxxx xxxx xxxx 0100 xxxx */
     64	/* STREXH		1110 1000 1100 xxxx xxxx xxxx 0101 xxxx */
     65	/* STREXD		1110 1000 1100 xxxx xxxx xxxx 0111 xxxx */
     66	/* LDREXB		1110 1000 1101 xxxx xxxx xxxx 0100 xxxx */
     67	/* LDREXH		1110 1000 1101 xxxx xxxx xxxx 0101 xxxx */
     68	/* LDREXD		1110 1000 1101 xxxx xxxx xxxx 0111 xxxx */
     69	/* And unallocated instructions...				*/
     70	DECODE_END
     71};
     72
     73static const union decode_item t32_table_1110_101x[] = {
     74	/* Data-processing (shifted register)				*/
     75
     76	/* TST			1110 1010 0001 xxxx xxxx 1111 xxxx xxxx */
     77	/* TEQ			1110 1010 1001 xxxx xxxx 1111 xxxx xxxx */
     78	DECODE_EMULATEX	(0xff700f00, 0xea100f00, PROBES_T32_TST,
     79						 REGS(NOSPPC, 0, 0, 0, NOSPPC)),
     80
     81	/* CMN			1110 1011 0001 xxxx xxxx 1111 xxxx xxxx */
     82	DECODE_OR	(0xfff00f00, 0xeb100f00),
     83	/* CMP			1110 1011 1011 xxxx xxxx 1111 xxxx xxxx */
     84	DECODE_EMULATEX	(0xfff00f00, 0xebb00f00, PROBES_T32_TST,
     85						 REGS(NOPC, 0, 0, 0, NOSPPC)),
     86
     87	/* MOV			1110 1010 010x 1111 xxxx xxxx xxxx xxxx */
     88	/* MVN			1110 1010 011x 1111 xxxx xxxx xxxx xxxx */
     89	DECODE_EMULATEX	(0xffcf0000, 0xea4f0000, PROBES_T32_MOV,
     90						 REGS(0, 0, NOSPPC, 0, NOSPPC)),
     91
     92	/* ???			1110 1010 101x xxxx xxxx xxxx xxxx xxxx */
     93	/* ???			1110 1010 111x xxxx xxxx xxxx xxxx xxxx */
     94	DECODE_REJECT	(0xffa00000, 0xeaa00000),
     95	/* ???			1110 1011 001x xxxx xxxx xxxx xxxx xxxx */
     96	DECODE_REJECT	(0xffe00000, 0xeb200000),
     97	/* ???			1110 1011 100x xxxx xxxx xxxx xxxx xxxx */
     98	DECODE_REJECT	(0xffe00000, 0xeb800000),
     99	/* ???			1110 1011 111x xxxx xxxx xxxx xxxx xxxx */
    100	DECODE_REJECT	(0xffe00000, 0xebe00000),
    101
    102	/* ADD/SUB SP, SP, Rm, LSL #0..3				*/
    103	/*			1110 1011 x0xx 1101 x000 1101 xx00 xxxx */
    104	DECODE_EMULATEX	(0xff4f7f30, 0xeb0d0d00, PROBES_T32_ADDSUB,
    105						 REGS(SP, 0, SP, 0, NOSPPC)),
    106
    107	/* ADD/SUB SP, SP, Rm, shift					*/
    108	/*			1110 1011 x0xx 1101 xxxx 1101 xxxx xxxx */
    109	DECODE_REJECT	(0xff4f0f00, 0xeb0d0d00),
    110
    111	/* ADD/SUB Rd, SP, Rm, shift					*/
    112	/*			1110 1011 x0xx 1101 xxxx xxxx xxxx xxxx */
    113	DECODE_EMULATEX	(0xff4f0000, 0xeb0d0000, PROBES_T32_ADDSUB,
    114						 REGS(SP, 0, NOPC, 0, NOSPPC)),
    115
    116	/* AND			1110 1010 000x xxxx xxxx xxxx xxxx xxxx */
    117	/* BIC			1110 1010 001x xxxx xxxx xxxx xxxx xxxx */
    118	/* ORR			1110 1010 010x xxxx xxxx xxxx xxxx xxxx */
    119	/* ORN			1110 1010 011x xxxx xxxx xxxx xxxx xxxx */
    120	/* EOR			1110 1010 100x xxxx xxxx xxxx xxxx xxxx */
    121	/* PKH			1110 1010 110x xxxx xxxx xxxx xxxx xxxx */
    122	/* ADD			1110 1011 000x xxxx xxxx xxxx xxxx xxxx */
    123	/* ADC			1110 1011 010x xxxx xxxx xxxx xxxx xxxx */
    124	/* SBC			1110 1011 011x xxxx xxxx xxxx xxxx xxxx */
    125	/* SUB			1110 1011 101x xxxx xxxx xxxx xxxx xxxx */
    126	/* RSB			1110 1011 110x xxxx xxxx xxxx xxxx xxxx */
    127	DECODE_EMULATEX	(0xfe000000, 0xea000000, PROBES_T32_LOGICAL,
    128						 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
    129
    130	DECODE_END
    131};
    132
    133static const union decode_item t32_table_1111_0x0x___0[] = {
    134	/* Data-processing (modified immediate)				*/
    135
    136	/* TST			1111 0x00 0001 xxxx 0xxx 1111 xxxx xxxx */
    137	/* TEQ			1111 0x00 1001 xxxx 0xxx 1111 xxxx xxxx */
    138	DECODE_EMULATEX	(0xfb708f00, 0xf0100f00, PROBES_T32_TST,
    139						 REGS(NOSPPC, 0, 0, 0, 0)),
    140
    141	/* CMN			1111 0x01 0001 xxxx 0xxx 1111 xxxx xxxx */
    142	DECODE_OR	(0xfbf08f00, 0xf1100f00),
    143	/* CMP			1111 0x01 1011 xxxx 0xxx 1111 xxxx xxxx */
    144	DECODE_EMULATEX	(0xfbf08f00, 0xf1b00f00, PROBES_T32_CMP,
    145						 REGS(NOPC, 0, 0, 0, 0)),
    146
    147	/* MOV			1111 0x00 010x 1111 0xxx xxxx xxxx xxxx */
    148	/* MVN			1111 0x00 011x 1111 0xxx xxxx xxxx xxxx */
    149	DECODE_EMULATEX	(0xfbcf8000, 0xf04f0000, PROBES_T32_MOV,
    150						 REGS(0, 0, NOSPPC, 0, 0)),
    151
    152	/* ???			1111 0x00 101x xxxx 0xxx xxxx xxxx xxxx */
    153	DECODE_REJECT	(0xfbe08000, 0xf0a00000),
    154	/* ???			1111 0x00 110x xxxx 0xxx xxxx xxxx xxxx */
    155	/* ???			1111 0x00 111x xxxx 0xxx xxxx xxxx xxxx */
    156	DECODE_REJECT	(0xfbc08000, 0xf0c00000),
    157	/* ???			1111 0x01 001x xxxx 0xxx xxxx xxxx xxxx */
    158	DECODE_REJECT	(0xfbe08000, 0xf1200000),
    159	/* ???			1111 0x01 100x xxxx 0xxx xxxx xxxx xxxx */
    160	DECODE_REJECT	(0xfbe08000, 0xf1800000),
    161	/* ???			1111 0x01 111x xxxx 0xxx xxxx xxxx xxxx */
    162	DECODE_REJECT	(0xfbe08000, 0xf1e00000),
    163
    164	/* ADD Rd, SP, #imm	1111 0x01 000x 1101 0xxx xxxx xxxx xxxx */
    165	/* SUB Rd, SP, #imm	1111 0x01 101x 1101 0xxx xxxx xxxx xxxx */
    166	DECODE_EMULATEX	(0xfb4f8000, 0xf10d0000, PROBES_T32_ADDSUB,
    167						 REGS(SP, 0, NOPC, 0, 0)),
    168
    169	/* AND			1111 0x00 000x xxxx 0xxx xxxx xxxx xxxx */
    170	/* BIC			1111 0x00 001x xxxx 0xxx xxxx xxxx xxxx */
    171	/* ORR			1111 0x00 010x xxxx 0xxx xxxx xxxx xxxx */
    172	/* ORN			1111 0x00 011x xxxx 0xxx xxxx xxxx xxxx */
    173	/* EOR			1111 0x00 100x xxxx 0xxx xxxx xxxx xxxx */
    174	/* ADD			1111 0x01 000x xxxx 0xxx xxxx xxxx xxxx */
    175	/* ADC			1111 0x01 010x xxxx 0xxx xxxx xxxx xxxx */
    176	/* SBC			1111 0x01 011x xxxx 0xxx xxxx xxxx xxxx */
    177	/* SUB			1111 0x01 101x xxxx 0xxx xxxx xxxx xxxx */
    178	/* RSB			1111 0x01 110x xxxx 0xxx xxxx xxxx xxxx */
    179	DECODE_EMULATEX	(0xfa008000, 0xf0000000, PROBES_T32_LOGICAL,
    180						 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
    181
    182	DECODE_END
    183};
    184
    185static const union decode_item t32_table_1111_0x1x___0[] = {
    186	/* Data-processing (plain binary immediate)			*/
    187
    188	/* ADDW Rd, PC, #imm	1111 0x10 0000 1111 0xxx xxxx xxxx xxxx */
    189	DECODE_OR	(0xfbff8000, 0xf20f0000),
    190	/* SUBW	Rd, PC, #imm	1111 0x10 1010 1111 0xxx xxxx xxxx xxxx */
    191	DECODE_EMULATEX	(0xfbff8000, 0xf2af0000, PROBES_T32_ADDWSUBW_PC,
    192						 REGS(PC, 0, NOSPPC, 0, 0)),
    193
    194	/* ADDW SP, SP, #imm	1111 0x10 0000 1101 0xxx 1101 xxxx xxxx */
    195	DECODE_OR	(0xfbff8f00, 0xf20d0d00),
    196	/* SUBW	SP, SP, #imm	1111 0x10 1010 1101 0xxx 1101 xxxx xxxx */
    197	DECODE_EMULATEX	(0xfbff8f00, 0xf2ad0d00, PROBES_T32_ADDWSUBW,
    198						 REGS(SP, 0, SP, 0, 0)),
    199
    200	/* ADDW			1111 0x10 0000 xxxx 0xxx xxxx xxxx xxxx */
    201	DECODE_OR	(0xfbf08000, 0xf2000000),
    202	/* SUBW			1111 0x10 1010 xxxx 0xxx xxxx xxxx xxxx */
    203	DECODE_EMULATEX	(0xfbf08000, 0xf2a00000, PROBES_T32_ADDWSUBW,
    204						 REGS(NOPCX, 0, NOSPPC, 0, 0)),
    205
    206	/* MOVW			1111 0x10 0100 xxxx 0xxx xxxx xxxx xxxx */
    207	/* MOVT			1111 0x10 1100 xxxx 0xxx xxxx xxxx xxxx */
    208	DECODE_EMULATEX	(0xfb708000, 0xf2400000, PROBES_T32_MOVW,
    209						 REGS(0, 0, NOSPPC, 0, 0)),
    210
    211	/* SSAT16		1111 0x11 0010 xxxx 0000 xxxx 00xx xxxx */
    212	/* SSAT			1111 0x11 00x0 xxxx 0xxx xxxx xxxx xxxx */
    213	/* USAT16		1111 0x11 1010 xxxx 0000 xxxx 00xx xxxx */
    214	/* USAT			1111 0x11 10x0 xxxx 0xxx xxxx xxxx xxxx */
    215	DECODE_EMULATEX	(0xfb508000, 0xf3000000, PROBES_T32_SAT,
    216						 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
    217
    218	/* SFBX			1111 0x11 0100 xxxx 0xxx xxxx xxxx xxxx */
    219	/* UFBX			1111 0x11 1100 xxxx 0xxx xxxx xxxx xxxx */
    220	DECODE_EMULATEX	(0xfb708000, 0xf3400000, PROBES_T32_BITFIELD,
    221						 REGS(NOSPPC, 0, NOSPPC, 0, 0)),
    222
    223	/* BFC			1111 0x11 0110 1111 0xxx xxxx xxxx xxxx */
    224	DECODE_EMULATEX	(0xfbff8000, 0xf36f0000, PROBES_T32_BITFIELD,
    225						 REGS(0, 0, NOSPPC, 0, 0)),
    226
    227	/* BFI			1111 0x11 0110 xxxx 0xxx xxxx xxxx xxxx */
    228	DECODE_EMULATEX	(0xfbf08000, 0xf3600000, PROBES_T32_BITFIELD,
    229						 REGS(NOSPPCX, 0, NOSPPC, 0, 0)),
    230
    231	DECODE_END
    232};
    233
    234static const union decode_item t32_table_1111_0xxx___1[] = {
    235	/* Branches and miscellaneous control				*/
    236
    237	/* YIELD		1111 0011 1010 xxxx 10x0 x000 0000 0001 */
    238	DECODE_OR	(0xfff0d7ff, 0xf3a08001),
    239	/* SEV			1111 0011 1010 xxxx 10x0 x000 0000 0100 */
    240	DECODE_EMULATE	(0xfff0d7ff, 0xf3a08004, PROBES_T32_SEV),
    241	/* NOP			1111 0011 1010 xxxx 10x0 x000 0000 0000 */
    242	/* WFE			1111 0011 1010 xxxx 10x0 x000 0000 0010 */
    243	/* WFI			1111 0011 1010 xxxx 10x0 x000 0000 0011 */
    244	DECODE_SIMULATE	(0xfff0d7fc, 0xf3a08000, PROBES_T32_WFE),
    245
    246	/* MRS Rd, CPSR		1111 0011 1110 xxxx 10x0 xxxx xxxx xxxx */
    247	DECODE_SIMULATEX(0xfff0d000, 0xf3e08000, PROBES_T32_MRS,
    248						 REGS(0, 0, NOSPPC, 0, 0)),
    249
    250	/*
    251	 * Unsupported instructions
    252	 *			1111 0x11 1xxx xxxx 10x0 xxxx xxxx xxxx
    253	 *
    254	 * MSR			1111 0011 100x xxxx 10x0 xxxx xxxx xxxx
    255	 * DBG hint		1111 0011 1010 xxxx 10x0 x000 1111 xxxx
    256	 * Unallocated hints	1111 0011 1010 xxxx 10x0 x000 xxxx xxxx
    257	 * CPS			1111 0011 1010 xxxx 10x0 xxxx xxxx xxxx
    258	 * CLREX/DSB/DMB/ISB	1111 0011 1011 xxxx 10x0 xxxx xxxx xxxx
    259	 * BXJ			1111 0011 1100 xxxx 10x0 xxxx xxxx xxxx
    260	 * SUBS PC,LR,#<imm8>	1111 0011 1101 xxxx 10x0 xxxx xxxx xxxx
    261	 * MRS Rd, SPSR		1111 0011 1111 xxxx 10x0 xxxx xxxx xxxx
    262	 * SMC			1111 0111 1111 xxxx 1000 xxxx xxxx xxxx
    263	 * UNDEFINED		1111 0111 1111 xxxx 1010 xxxx xxxx xxxx
    264	 * ???			1111 0111 1xxx xxxx 1010 xxxx xxxx xxxx
    265	 */
    266	DECODE_REJECT	(0xfb80d000, 0xf3808000),
    267
    268	/* Bcc			1111 0xxx xxxx xxxx 10x0 xxxx xxxx xxxx */
    269	DECODE_CUSTOM	(0xf800d000, 0xf0008000, PROBES_T32_BRANCH_COND),
    270
    271	/* BLX			1111 0xxx xxxx xxxx 11x0 xxxx xxxx xxx0 */
    272	DECODE_OR	(0xf800d001, 0xf000c000),
    273	/* B			1111 0xxx xxxx xxxx 10x1 xxxx xxxx xxxx */
    274	/* BL			1111 0xxx xxxx xxxx 11x1 xxxx xxxx xxxx */
    275	DECODE_SIMULATE	(0xf8009000, 0xf0009000, PROBES_T32_BRANCH),
    276
    277	DECODE_END
    278};
    279
    280static const union decode_item t32_table_1111_100x_x0x1__1111[] = {
    281	/* Memory hints							*/
    282
    283	/* PLD (literal)	1111 1000 x001 1111 1111 xxxx xxxx xxxx */
    284	/* PLI (literal)	1111 1001 x001 1111 1111 xxxx xxxx xxxx */
    285	DECODE_SIMULATE	(0xfe7ff000, 0xf81ff000, PROBES_T32_PLDI),
    286
    287	/* PLD{W} (immediate)	1111 1000 10x1 xxxx 1111 xxxx xxxx xxxx */
    288	DECODE_OR	(0xffd0f000, 0xf890f000),
    289	/* PLD{W} (immediate)	1111 1000 00x1 xxxx 1111 1100 xxxx xxxx */
    290	DECODE_OR	(0xffd0ff00, 0xf810fc00),
    291	/* PLI (immediate)	1111 1001 1001 xxxx 1111 xxxx xxxx xxxx */
    292	DECODE_OR	(0xfff0f000, 0xf990f000),
    293	/* PLI (immediate)	1111 1001 0001 xxxx 1111 1100 xxxx xxxx */
    294	DECODE_SIMULATEX(0xfff0ff00, 0xf910fc00, PROBES_T32_PLDI,
    295						 REGS(NOPCX, 0, 0, 0, 0)),
    296
    297	/* PLD{W} (register)	1111 1000 00x1 xxxx 1111 0000 00xx xxxx */
    298	DECODE_OR	(0xffd0ffc0, 0xf810f000),
    299	/* PLI (register)	1111 1001 0001 xxxx 1111 0000 00xx xxxx */
    300	DECODE_SIMULATEX(0xfff0ffc0, 0xf910f000, PROBES_T32_PLDI,
    301						 REGS(NOPCX, 0, 0, 0, NOSPPC)),
    302
    303	/* Other unallocated instructions...				*/
    304	DECODE_END
    305};
    306
    307static const union decode_item t32_table_1111_100x[] = {
    308	/* Store/Load single data item					*/
    309
    310	/* ???			1111 100x x11x xxxx xxxx xxxx xxxx xxxx */
    311	DECODE_REJECT	(0xfe600000, 0xf8600000),
    312
    313	/* ???			1111 1001 0101 xxxx xxxx xxxx xxxx xxxx */
    314	DECODE_REJECT	(0xfff00000, 0xf9500000),
    315
    316	/* ???			1111 100x 0xxx xxxx xxxx 10x0 xxxx xxxx */
    317	DECODE_REJECT	(0xfe800d00, 0xf8000800),
    318
    319	/* STRBT		1111 1000 0000 xxxx xxxx 1110 xxxx xxxx */
    320	/* STRHT		1111 1000 0010 xxxx xxxx 1110 xxxx xxxx */
    321	/* STRT			1111 1000 0100 xxxx xxxx 1110 xxxx xxxx */
    322	/* LDRBT		1111 1000 0001 xxxx xxxx 1110 xxxx xxxx */
    323	/* LDRSBT		1111 1001 0001 xxxx xxxx 1110 xxxx xxxx */
    324	/* LDRHT		1111 1000 0011 xxxx xxxx 1110 xxxx xxxx */
    325	/* LDRSHT		1111 1001 0011 xxxx xxxx 1110 xxxx xxxx */
    326	/* LDRT			1111 1000 0101 xxxx xxxx 1110 xxxx xxxx */
    327	DECODE_REJECT	(0xfe800f00, 0xf8000e00),
    328
    329	/* STR{,B,H} Rn,[PC...]	1111 1000 xxx0 1111 xxxx xxxx xxxx xxxx */
    330	DECODE_REJECT	(0xff1f0000, 0xf80f0000),
    331
    332	/* STR{,B,H} PC,[Rn...]	1111 1000 xxx0 xxxx 1111 xxxx xxxx xxxx */
    333	DECODE_REJECT	(0xff10f000, 0xf800f000),
    334
    335	/* LDR (literal)	1111 1000 x101 1111 xxxx xxxx xxxx xxxx */
    336	DECODE_SIMULATEX(0xff7f0000, 0xf85f0000, PROBES_T32_LDR_LIT,
    337						 REGS(PC, ANY, 0, 0, 0)),
    338
    339	/* STR (immediate)	1111 1000 0100 xxxx xxxx 1xxx xxxx xxxx */
    340	/* LDR (immediate)	1111 1000 0101 xxxx xxxx 1xxx xxxx xxxx */
    341	DECODE_OR	(0xffe00800, 0xf8400800),
    342	/* STR (immediate)	1111 1000 1100 xxxx xxxx xxxx xxxx xxxx */
    343	/* LDR (immediate)	1111 1000 1101 xxxx xxxx xxxx xxxx xxxx */
    344	DECODE_EMULATEX	(0xffe00000, 0xf8c00000, PROBES_T32_LDRSTR,
    345						 REGS(NOPCX, ANY, 0, 0, 0)),
    346
    347	/* STR (register)	1111 1000 0100 xxxx xxxx 0000 00xx xxxx */
    348	/* LDR (register)	1111 1000 0101 xxxx xxxx 0000 00xx xxxx */
    349	DECODE_EMULATEX	(0xffe00fc0, 0xf8400000, PROBES_T32_LDRSTR,
    350						 REGS(NOPCX, ANY, 0, 0, NOSPPC)),
    351
    352	/* LDRB (literal)	1111 1000 x001 1111 xxxx xxxx xxxx xxxx */
    353	/* LDRSB (literal)	1111 1001 x001 1111 xxxx xxxx xxxx xxxx */
    354	/* LDRH (literal)	1111 1000 x011 1111 xxxx xxxx xxxx xxxx */
    355	/* LDRSH (literal)	1111 1001 x011 1111 xxxx xxxx xxxx xxxx */
    356	DECODE_SIMULATEX(0xfe5f0000, 0xf81f0000, PROBES_T32_LDR_LIT,
    357						 REGS(PC, NOSPPCX, 0, 0, 0)),
    358
    359	/* STRB (immediate)	1111 1000 0000 xxxx xxxx 1xxx xxxx xxxx */
    360	/* STRH (immediate)	1111 1000 0010 xxxx xxxx 1xxx xxxx xxxx */
    361	/* LDRB (immediate)	1111 1000 0001 xxxx xxxx 1xxx xxxx xxxx */
    362	/* LDRSB (immediate)	1111 1001 0001 xxxx xxxx 1xxx xxxx xxxx */
    363	/* LDRH (immediate)	1111 1000 0011 xxxx xxxx 1xxx xxxx xxxx */
    364	/* LDRSH (immediate)	1111 1001 0011 xxxx xxxx 1xxx xxxx xxxx */
    365	DECODE_OR	(0xfec00800, 0xf8000800),
    366	/* STRB (immediate)	1111 1000 1000 xxxx xxxx xxxx xxxx xxxx */
    367	/* STRH (immediate)	1111 1000 1010 xxxx xxxx xxxx xxxx xxxx */
    368	/* LDRB (immediate)	1111 1000 1001 xxxx xxxx xxxx xxxx xxxx */
    369	/* LDRSB (immediate)	1111 1001 1001 xxxx xxxx xxxx xxxx xxxx */
    370	/* LDRH (immediate)	1111 1000 1011 xxxx xxxx xxxx xxxx xxxx */
    371	/* LDRSH (immediate)	1111 1001 1011 xxxx xxxx xxxx xxxx xxxx */
    372	DECODE_EMULATEX	(0xfec00000, 0xf8800000, PROBES_T32_LDRSTR,
    373						 REGS(NOPCX, NOSPPCX, 0, 0, 0)),
    374
    375	/* STRB (register)	1111 1000 0000 xxxx xxxx 0000 00xx xxxx */
    376	/* STRH (register)	1111 1000 0010 xxxx xxxx 0000 00xx xxxx */
    377	/* LDRB (register)	1111 1000 0001 xxxx xxxx 0000 00xx xxxx */
    378	/* LDRSB (register)	1111 1001 0001 xxxx xxxx 0000 00xx xxxx */
    379	/* LDRH (register)	1111 1000 0011 xxxx xxxx 0000 00xx xxxx */
    380	/* LDRSH (register)	1111 1001 0011 xxxx xxxx 0000 00xx xxxx */
    381	DECODE_EMULATEX	(0xfe800fc0, 0xf8000000, PROBES_T32_LDRSTR,
    382						 REGS(NOPCX, NOSPPCX, 0, 0, NOSPPC)),
    383
    384	/* Other unallocated instructions...				*/
    385	DECODE_END
    386};
    387
    388static const union decode_item t32_table_1111_1010___1111[] = {
    389	/* Data-processing (register)					*/
    390
    391	/* ???			1111 1010 011x xxxx 1111 xxxx 1xxx xxxx */
    392	DECODE_REJECT	(0xffe0f080, 0xfa60f080),
    393
    394	/* SXTH			1111 1010 0000 1111 1111 xxxx 1xxx xxxx */
    395	/* UXTH			1111 1010 0001 1111 1111 xxxx 1xxx xxxx */
    396	/* SXTB16		1111 1010 0010 1111 1111 xxxx 1xxx xxxx */
    397	/* UXTB16		1111 1010 0011 1111 1111 xxxx 1xxx xxxx */
    398	/* SXTB			1111 1010 0100 1111 1111 xxxx 1xxx xxxx */
    399	/* UXTB			1111 1010 0101 1111 1111 xxxx 1xxx xxxx */
    400	DECODE_EMULATEX	(0xff8ff080, 0xfa0ff080, PROBES_T32_SIGN_EXTEND,
    401						 REGS(0, 0, NOSPPC, 0, NOSPPC)),
    402
    403
    404	/* ???			1111 1010 1xxx xxxx 1111 xxxx 0x11 xxxx */
    405	DECODE_REJECT	(0xff80f0b0, 0xfa80f030),
    406	/* ???			1111 1010 1x11 xxxx 1111 xxxx 0xxx xxxx */
    407	DECODE_REJECT	(0xffb0f080, 0xfab0f000),
    408
    409	/* SADD16		1111 1010 1001 xxxx 1111 xxxx 0000 xxxx */
    410	/* SASX			1111 1010 1010 xxxx 1111 xxxx 0000 xxxx */
    411	/* SSAX			1111 1010 1110 xxxx 1111 xxxx 0000 xxxx */
    412	/* SSUB16		1111 1010 1101 xxxx 1111 xxxx 0000 xxxx */
    413	/* SADD8		1111 1010 1000 xxxx 1111 xxxx 0000 xxxx */
    414	/* SSUB8		1111 1010 1100 xxxx 1111 xxxx 0000 xxxx */
    415
    416	/* QADD16		1111 1010 1001 xxxx 1111 xxxx 0001 xxxx */
    417	/* QASX			1111 1010 1010 xxxx 1111 xxxx 0001 xxxx */
    418	/* QSAX			1111 1010 1110 xxxx 1111 xxxx 0001 xxxx */
    419	/* QSUB16		1111 1010 1101 xxxx 1111 xxxx 0001 xxxx */
    420	/* QADD8		1111 1010 1000 xxxx 1111 xxxx 0001 xxxx */
    421	/* QSUB8		1111 1010 1100 xxxx 1111 xxxx 0001 xxxx */
    422
    423	/* SHADD16		1111 1010 1001 xxxx 1111 xxxx 0010 xxxx */
    424	/* SHASX		1111 1010 1010 xxxx 1111 xxxx 0010 xxxx */
    425	/* SHSAX		1111 1010 1110 xxxx 1111 xxxx 0010 xxxx */
    426	/* SHSUB16		1111 1010 1101 xxxx 1111 xxxx 0010 xxxx */
    427	/* SHADD8		1111 1010 1000 xxxx 1111 xxxx 0010 xxxx */
    428	/* SHSUB8		1111 1010 1100 xxxx 1111 xxxx 0010 xxxx */
    429
    430	/* UADD16		1111 1010 1001 xxxx 1111 xxxx 0100 xxxx */
    431	/* UASX			1111 1010 1010 xxxx 1111 xxxx 0100 xxxx */
    432	/* USAX			1111 1010 1110 xxxx 1111 xxxx 0100 xxxx */
    433	/* USUB16		1111 1010 1101 xxxx 1111 xxxx 0100 xxxx */
    434	/* UADD8		1111 1010 1000 xxxx 1111 xxxx 0100 xxxx */
    435	/* USUB8		1111 1010 1100 xxxx 1111 xxxx 0100 xxxx */
    436
    437	/* UQADD16		1111 1010 1001 xxxx 1111 xxxx 0101 xxxx */
    438	/* UQASX		1111 1010 1010 xxxx 1111 xxxx 0101 xxxx */
    439	/* UQSAX		1111 1010 1110 xxxx 1111 xxxx 0101 xxxx */
    440	/* UQSUB16		1111 1010 1101 xxxx 1111 xxxx 0101 xxxx */
    441	/* UQADD8		1111 1010 1000 xxxx 1111 xxxx 0101 xxxx */
    442	/* UQSUB8		1111 1010 1100 xxxx 1111 xxxx 0101 xxxx */
    443
    444	/* UHADD16		1111 1010 1001 xxxx 1111 xxxx 0110 xxxx */
    445	/* UHASX		1111 1010 1010 xxxx 1111 xxxx 0110 xxxx */
    446	/* UHSAX		1111 1010 1110 xxxx 1111 xxxx 0110 xxxx */
    447	/* UHSUB16		1111 1010 1101 xxxx 1111 xxxx 0110 xxxx */
    448	/* UHADD8		1111 1010 1000 xxxx 1111 xxxx 0110 xxxx */
    449	/* UHSUB8		1111 1010 1100 xxxx 1111 xxxx 0110 xxxx */
    450	DECODE_OR	(0xff80f080, 0xfa80f000),
    451
    452	/* SXTAH		1111 1010 0000 xxxx 1111 xxxx 1xxx xxxx */
    453	/* UXTAH		1111 1010 0001 xxxx 1111 xxxx 1xxx xxxx */
    454	/* SXTAB16		1111 1010 0010 xxxx 1111 xxxx 1xxx xxxx */
    455	/* UXTAB16		1111 1010 0011 xxxx 1111 xxxx 1xxx xxxx */
    456	/* SXTAB		1111 1010 0100 xxxx 1111 xxxx 1xxx xxxx */
    457	/* UXTAB		1111 1010 0101 xxxx 1111 xxxx 1xxx xxxx */
    458	DECODE_OR	(0xff80f080, 0xfa00f080),
    459
    460	/* QADD			1111 1010 1000 xxxx 1111 xxxx 1000 xxxx */
    461	/* QDADD		1111 1010 1000 xxxx 1111 xxxx 1001 xxxx */
    462	/* QSUB			1111 1010 1000 xxxx 1111 xxxx 1010 xxxx */
    463	/* QDSUB		1111 1010 1000 xxxx 1111 xxxx 1011 xxxx */
    464	DECODE_OR	(0xfff0f0c0, 0xfa80f080),
    465
    466	/* SEL			1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
    467	DECODE_OR	(0xfff0f0f0, 0xfaa0f080),
    468
    469	/* LSL			1111 1010 000x xxxx 1111 xxxx 0000 xxxx */
    470	/* LSR			1111 1010 001x xxxx 1111 xxxx 0000 xxxx */
    471	/* ASR			1111 1010 010x xxxx 1111 xxxx 0000 xxxx */
    472	/* ROR			1111 1010 011x xxxx 1111 xxxx 0000 xxxx */
    473	DECODE_EMULATEX	(0xff80f0f0, 0xfa00f000, PROBES_T32_MEDIA,
    474						 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
    475
    476	/* CLZ			1111 1010 1010 xxxx 1111 xxxx 1000 xxxx */
    477	DECODE_OR	(0xfff0f0f0, 0xfab0f080),
    478
    479	/* REV			1111 1010 1001 xxxx 1111 xxxx 1000 xxxx */
    480	/* REV16		1111 1010 1001 xxxx 1111 xxxx 1001 xxxx */
    481	/* RBIT			1111 1010 1001 xxxx 1111 xxxx 1010 xxxx */
    482	/* REVSH		1111 1010 1001 xxxx 1111 xxxx 1011 xxxx */
    483	DECODE_EMULATEX	(0xfff0f0c0, 0xfa90f080, PROBES_T32_REVERSE,
    484						 REGS(NOSPPC, 0, NOSPPC, 0, SAMEAS16)),
    485
    486	/* Other unallocated instructions...				*/
    487	DECODE_END
    488};
    489
    490static const union decode_item t32_table_1111_1011_0[] = {
    491	/* Multiply, multiply accumulate, and absolute difference	*/
    492
    493	/* ???			1111 1011 0000 xxxx 1111 xxxx 0001 xxxx */
    494	DECODE_REJECT	(0xfff0f0f0, 0xfb00f010),
    495	/* ???			1111 1011 0111 xxxx 1111 xxxx 0001 xxxx */
    496	DECODE_REJECT	(0xfff0f0f0, 0xfb70f010),
    497
    498	/* SMULxy		1111 1011 0001 xxxx 1111 xxxx 00xx xxxx */
    499	DECODE_OR	(0xfff0f0c0, 0xfb10f000),
    500	/* MUL			1111 1011 0000 xxxx 1111 xxxx 0000 xxxx */
    501	/* SMUAD{X}		1111 1011 0010 xxxx 1111 xxxx 000x xxxx */
    502	/* SMULWy		1111 1011 0011 xxxx 1111 xxxx 000x xxxx */
    503	/* SMUSD{X}		1111 1011 0100 xxxx 1111 xxxx 000x xxxx */
    504	/* SMMUL{R}		1111 1011 0101 xxxx 1111 xxxx 000x xxxx */
    505	/* USAD8		1111 1011 0111 xxxx 1111 xxxx 0000 xxxx */
    506	DECODE_EMULATEX	(0xff80f0e0, 0xfb00f000, PROBES_T32_MUL_ADD,
    507						 REGS(NOSPPC, 0, NOSPPC, 0, NOSPPC)),
    508
    509	/* ???			1111 1011 0111 xxxx xxxx xxxx 0001 xxxx */
    510	DECODE_REJECT	(0xfff000f0, 0xfb700010),
    511
    512	/* SMLAxy		1111 1011 0001 xxxx xxxx xxxx 00xx xxxx */
    513	DECODE_OR	(0xfff000c0, 0xfb100000),
    514	/* MLA			1111 1011 0000 xxxx xxxx xxxx 0000 xxxx */
    515	/* MLS			1111 1011 0000 xxxx xxxx xxxx 0001 xxxx */
    516	/* SMLAD{X}		1111 1011 0010 xxxx xxxx xxxx 000x xxxx */
    517	/* SMLAWy		1111 1011 0011 xxxx xxxx xxxx 000x xxxx */
    518	/* SMLSD{X}		1111 1011 0100 xxxx xxxx xxxx 000x xxxx */
    519	/* SMMLA{R}		1111 1011 0101 xxxx xxxx xxxx 000x xxxx */
    520	/* SMMLS{R}		1111 1011 0110 xxxx xxxx xxxx 000x xxxx */
    521	/* USADA8		1111 1011 0111 xxxx xxxx xxxx 0000 xxxx */
    522	DECODE_EMULATEX	(0xff8000c0, 0xfb000000,  PROBES_T32_MUL_ADD2,
    523						 REGS(NOSPPC, NOSPPCX, NOSPPC, 0, NOSPPC)),
    524
    525	/* Other unallocated instructions...				*/
    526	DECODE_END
    527};
    528
    529static const union decode_item t32_table_1111_1011_1[] = {
    530	/* Long multiply, long multiply accumulate, and divide		*/
    531
    532	/* UMAAL		1111 1011 1110 xxxx xxxx xxxx 0110 xxxx */
    533	DECODE_OR	(0xfff000f0, 0xfbe00060),
    534	/* SMLALxy		1111 1011 1100 xxxx xxxx xxxx 10xx xxxx */
    535	DECODE_OR	(0xfff000c0, 0xfbc00080),
    536	/* SMLALD{X}		1111 1011 1100 xxxx xxxx xxxx 110x xxxx */
    537	/* SMLSLD{X}		1111 1011 1101 xxxx xxxx xxxx 110x xxxx */
    538	DECODE_OR	(0xffe000e0, 0xfbc000c0),
    539	/* SMULL		1111 1011 1000 xxxx xxxx xxxx 0000 xxxx */
    540	/* UMULL		1111 1011 1010 xxxx xxxx xxxx 0000 xxxx */
    541	/* SMLAL		1111 1011 1100 xxxx xxxx xxxx 0000 xxxx */
    542	/* UMLAL		1111 1011 1110 xxxx xxxx xxxx 0000 xxxx */
    543	DECODE_EMULATEX	(0xff9000f0, 0xfb800000, PROBES_T32_MUL_ADD_LONG,
    544						 REGS(NOSPPC, NOSPPC, NOSPPC, 0, NOSPPC)),
    545
    546	/* SDIV			1111 1011 1001 xxxx xxxx xxxx 1111 xxxx */
    547	/* UDIV			1111 1011 1011 xxxx xxxx xxxx 1111 xxxx */
    548	/* Other unallocated instructions...				*/
    549	DECODE_END
    550};
    551
    552const union decode_item probes_decode_thumb32_table[] = {
    553
    554	/*
    555	 * Load/store multiple instructions
    556	 *			1110 100x x0xx xxxx xxxx xxxx xxxx xxxx
    557	 */
    558	DECODE_TABLE	(0xfe400000, 0xe8000000, t32_table_1110_100x_x0xx),
    559
    560	/*
    561	 * Load/store dual, load/store exclusive, table branch
    562	 *			1110 100x x1xx xxxx xxxx xxxx xxxx xxxx
    563	 */
    564	DECODE_TABLE	(0xfe400000, 0xe8400000, t32_table_1110_100x_x1xx),
    565
    566	/*
    567	 * Data-processing (shifted register)
    568	 *			1110 101x xxxx xxxx xxxx xxxx xxxx xxxx
    569	 */
    570	DECODE_TABLE	(0xfe000000, 0xea000000, t32_table_1110_101x),
    571
    572	/*
    573	 * Coprocessor instructions
    574	 *			1110 11xx xxxx xxxx xxxx xxxx xxxx xxxx
    575	 */
    576	DECODE_REJECT	(0xfc000000, 0xec000000),
    577
    578	/*
    579	 * Data-processing (modified immediate)
    580	 *			1111 0x0x xxxx xxxx 0xxx xxxx xxxx xxxx
    581	 */
    582	DECODE_TABLE	(0xfa008000, 0xf0000000, t32_table_1111_0x0x___0),
    583
    584	/*
    585	 * Data-processing (plain binary immediate)
    586	 *			1111 0x1x xxxx xxxx 0xxx xxxx xxxx xxxx
    587	 */
    588	DECODE_TABLE	(0xfa008000, 0xf2000000, t32_table_1111_0x1x___0),
    589
    590	/*
    591	 * Branches and miscellaneous control
    592	 *			1111 0xxx xxxx xxxx 1xxx xxxx xxxx xxxx
    593	 */
    594	DECODE_TABLE	(0xf8008000, 0xf0008000, t32_table_1111_0xxx___1),
    595
    596	/*
    597	 * Advanced SIMD element or structure load/store instructions
    598	 *			1111 1001 xxx0 xxxx xxxx xxxx xxxx xxxx
    599	 */
    600	DECODE_REJECT	(0xff100000, 0xf9000000),
    601
    602	/*
    603	 * Memory hints
    604	 *			1111 100x x0x1 xxxx 1111 xxxx xxxx xxxx
    605	 */
    606	DECODE_TABLE	(0xfe50f000, 0xf810f000, t32_table_1111_100x_x0x1__1111),
    607
    608	/*
    609	 * Store single data item
    610	 *			1111 1000 xxx0 xxxx xxxx xxxx xxxx xxxx
    611	 * Load single data items
    612	 *			1111 100x xxx1 xxxx xxxx xxxx xxxx xxxx
    613	 */
    614	DECODE_TABLE	(0xfe000000, 0xf8000000, t32_table_1111_100x),
    615
    616	/*
    617	 * Data-processing (register)
    618	 *			1111 1010 xxxx xxxx 1111 xxxx xxxx xxxx
    619	 */
    620	DECODE_TABLE	(0xff00f000, 0xfa00f000, t32_table_1111_1010___1111),
    621
    622	/*
    623	 * Multiply, multiply accumulate, and absolute difference
    624	 *			1111 1011 0xxx xxxx xxxx xxxx xxxx xxxx
    625	 */
    626	DECODE_TABLE	(0xff800000, 0xfb000000, t32_table_1111_1011_0),
    627
    628	/*
    629	 * Long multiply, long multiply accumulate, and divide
    630	 *			1111 1011 1xxx xxxx xxxx xxxx xxxx xxxx
    631	 */
    632	DECODE_TABLE	(0xff800000, 0xfb800000, t32_table_1111_1011_1),
    633
    634	/*
    635	 * Coprocessor instructions
    636	 *			1111 11xx xxxx xxxx xxxx xxxx xxxx xxxx
    637	 */
    638	DECODE_END
    639};
    640#ifdef CONFIG_ARM_KPROBES_TEST_MODULE
    641EXPORT_SYMBOL_GPL(probes_decode_thumb32_table);
    642#endif
    643
    644static const union decode_item t16_table_1011[] = {
    645	/* Miscellaneous 16-bit instructions		    */
    646
    647	/* ADD (SP plus immediate)	1011 0000 0xxx xxxx */
    648	/* SUB (SP minus immediate)	1011 0000 1xxx xxxx */
    649	DECODE_SIMULATE	(0xff00, 0xb000, PROBES_T16_ADD_SP),
    650
    651	/* CBZ				1011 00x1 xxxx xxxx */
    652	/* CBNZ				1011 10x1 xxxx xxxx */
    653	DECODE_SIMULATE	(0xf500, 0xb100, PROBES_T16_CBZ),
    654
    655	/* SXTH				1011 0010 00xx xxxx */
    656	/* SXTB				1011 0010 01xx xxxx */
    657	/* UXTH				1011 0010 10xx xxxx */
    658	/* UXTB				1011 0010 11xx xxxx */
    659	/* REV				1011 1010 00xx xxxx */
    660	/* REV16			1011 1010 01xx xxxx */
    661	/* ???				1011 1010 10xx xxxx */
    662	/* REVSH			1011 1010 11xx xxxx */
    663	DECODE_REJECT	(0xffc0, 0xba80),
    664	DECODE_EMULATE	(0xf500, 0xb000, PROBES_T16_SIGN_EXTEND),
    665
    666	/* PUSH				1011 010x xxxx xxxx */
    667	DECODE_CUSTOM	(0xfe00, 0xb400, PROBES_T16_PUSH),
    668	/* POP				1011 110x xxxx xxxx */
    669	DECODE_CUSTOM	(0xfe00, 0xbc00, PROBES_T16_POP),
    670
    671	/*
    672	 * If-Then, and hints
    673	 *				1011 1111 xxxx xxxx
    674	 */
    675
    676	/* YIELD			1011 1111 0001 0000 */
    677	DECODE_OR	(0xffff, 0xbf10),
    678	/* SEV				1011 1111 0100 0000 */
    679	DECODE_EMULATE	(0xffff, 0xbf40, PROBES_T16_SEV),
    680	/* NOP				1011 1111 0000 0000 */
    681	/* WFE				1011 1111 0010 0000 */
    682	/* WFI				1011 1111 0011 0000 */
    683	DECODE_SIMULATE	(0xffcf, 0xbf00, PROBES_T16_WFE),
    684	/* Unassigned hints		1011 1111 xxxx 0000 */
    685	DECODE_REJECT	(0xff0f, 0xbf00),
    686	/* IT				1011 1111 xxxx xxxx */
    687	DECODE_CUSTOM	(0xff00, 0xbf00, PROBES_T16_IT),
    688
    689	/* SETEND			1011 0110 010x xxxx */
    690	/* CPS				1011 0110 011x xxxx */
    691	/* BKPT				1011 1110 xxxx xxxx */
    692	/* And unallocated instructions...		    */
    693	DECODE_END
    694};
    695
    696const union decode_item probes_decode_thumb16_table[] = {
    697
    698	/*
    699	 * Shift (immediate), add, subtract, move, and compare
    700	 *				00xx xxxx xxxx xxxx
    701	 */
    702
    703	/* CMP (immediate)		0010 1xxx xxxx xxxx */
    704	DECODE_EMULATE	(0xf800, 0x2800, PROBES_T16_CMP),
    705
    706	/* ADD (register)		0001 100x xxxx xxxx */
    707	/* SUB (register)		0001 101x xxxx xxxx */
    708	/* LSL (immediate)		0000 0xxx xxxx xxxx */
    709	/* LSR (immediate)		0000 1xxx xxxx xxxx */
    710	/* ASR (immediate)		0001 0xxx xxxx xxxx */
    711	/* ADD (immediate, Thumb)	0001 110x xxxx xxxx */
    712	/* SUB (immediate, Thumb)	0001 111x xxxx xxxx */
    713	/* MOV (immediate)		0010 0xxx xxxx xxxx */
    714	/* ADD (immediate, Thumb)	0011 0xxx xxxx xxxx */
    715	/* SUB (immediate, Thumb)	0011 1xxx xxxx xxxx */
    716	DECODE_EMULATE	(0xc000, 0x0000, PROBES_T16_ADDSUB),
    717
    718	/*
    719	 * 16-bit Thumb data-processing instructions
    720	 *				0100 00xx xxxx xxxx
    721	 */
    722
    723	/* TST (register)		0100 0010 00xx xxxx */
    724	DECODE_EMULATE	(0xffc0, 0x4200, PROBES_T16_CMP),
    725	/* CMP (register)		0100 0010 10xx xxxx */
    726	/* CMN (register)		0100 0010 11xx xxxx */
    727	DECODE_EMULATE	(0xff80, 0x4280, PROBES_T16_CMP),
    728	/* AND (register)		0100 0000 00xx xxxx */
    729	/* EOR (register)		0100 0000 01xx xxxx */
    730	/* LSL (register)		0100 0000 10xx xxxx */
    731	/* LSR (register)		0100 0000 11xx xxxx */
    732	/* ASR (register)		0100 0001 00xx xxxx */
    733	/* ADC (register)		0100 0001 01xx xxxx */
    734	/* SBC (register)		0100 0001 10xx xxxx */
    735	/* ROR (register)		0100 0001 11xx xxxx */
    736	/* RSB (immediate)		0100 0010 01xx xxxx */
    737	/* ORR (register)		0100 0011 00xx xxxx */
    738	/* MUL				0100 0011 00xx xxxx */
    739	/* BIC (register)		0100 0011 10xx xxxx */
    740	/* MVN (register)		0100 0011 10xx xxxx */
    741	DECODE_EMULATE	(0xfc00, 0x4000, PROBES_T16_LOGICAL),
    742
    743	/*
    744	 * Special data instructions and branch and exchange
    745	 *				0100 01xx xxxx xxxx
    746	 */
    747
    748	/* BLX pc			0100 0111 1111 1xxx */
    749	DECODE_REJECT	(0xfff8, 0x47f8),
    750
    751	/* BX (register)		0100 0111 0xxx xxxx */
    752	/* BLX (register)		0100 0111 1xxx xxxx */
    753	DECODE_SIMULATE (0xff00, 0x4700, PROBES_T16_BLX),
    754
    755	/* ADD pc, pc			0100 0100 1111 1111 */
    756	DECODE_REJECT	(0xffff, 0x44ff),
    757
    758	/* ADD (register)		0100 0100 xxxx xxxx */
    759	/* CMP (register)		0100 0101 xxxx xxxx */
    760	/* MOV (register)		0100 0110 xxxx xxxx */
    761	DECODE_CUSTOM	(0xfc00, 0x4400, PROBES_T16_HIREGOPS),
    762
    763	/*
    764	 * Load from Literal Pool
    765	 * LDR (literal)		0100 1xxx xxxx xxxx
    766	 */
    767	DECODE_SIMULATE	(0xf800, 0x4800, PROBES_T16_LDR_LIT),
    768
    769	/*
    770	 * 16-bit Thumb Load/store instructions
    771	 *				0101 xxxx xxxx xxxx
    772	 *				011x xxxx xxxx xxxx
    773	 *				100x xxxx xxxx xxxx
    774	 */
    775
    776	/* STR (register)		0101 000x xxxx xxxx */
    777	/* STRH (register)		0101 001x xxxx xxxx */
    778	/* STRB (register)		0101 010x xxxx xxxx */
    779	/* LDRSB (register)		0101 011x xxxx xxxx */
    780	/* LDR (register)		0101 100x xxxx xxxx */
    781	/* LDRH (register)		0101 101x xxxx xxxx */
    782	/* LDRB (register)		0101 110x xxxx xxxx */
    783	/* LDRSH (register)		0101 111x xxxx xxxx */
    784	/* STR (immediate, Thumb)	0110 0xxx xxxx xxxx */
    785	/* LDR (immediate, Thumb)	0110 1xxx xxxx xxxx */
    786	/* STRB (immediate, Thumb)	0111 0xxx xxxx xxxx */
    787	/* LDRB (immediate, Thumb)	0111 1xxx xxxx xxxx */
    788	DECODE_EMULATE	(0xc000, 0x4000, PROBES_T16_LDRHSTRH),
    789	/* STRH (immediate, Thumb)	1000 0xxx xxxx xxxx */
    790	/* LDRH (immediate, Thumb)	1000 1xxx xxxx xxxx */
    791	DECODE_EMULATE	(0xf000, 0x8000, PROBES_T16_LDRHSTRH),
    792	/* STR (immediate, Thumb)	1001 0xxx xxxx xxxx */
    793	/* LDR (immediate, Thumb)	1001 1xxx xxxx xxxx */
    794	DECODE_SIMULATE	(0xf000, 0x9000, PROBES_T16_LDRSTR),
    795
    796	/*
    797	 * Generate PC-/SP-relative address
    798	 * ADR (literal)		1010 0xxx xxxx xxxx
    799	 * ADD (SP plus immediate)	1010 1xxx xxxx xxxx
    800	 */
    801	DECODE_SIMULATE	(0xf000, 0xa000, PROBES_T16_ADR),
    802
    803	/*
    804	 * Miscellaneous 16-bit instructions
    805	 *				1011 xxxx xxxx xxxx
    806	 */
    807	DECODE_TABLE	(0xf000, 0xb000, t16_table_1011),
    808
    809	/* STM				1100 0xxx xxxx xxxx */
    810	/* LDM				1100 1xxx xxxx xxxx */
    811	DECODE_EMULATE	(0xf000, 0xc000, PROBES_T16_LDMSTM),
    812
    813	/*
    814	 * Conditional branch, and Supervisor Call
    815	 */
    816
    817	/* Permanently UNDEFINED	1101 1110 xxxx xxxx */
    818	/* SVC				1101 1111 xxxx xxxx */
    819	DECODE_REJECT	(0xfe00, 0xde00),
    820
    821	/* Conditional branch		1101 xxxx xxxx xxxx */
    822	DECODE_CUSTOM	(0xf000, 0xd000, PROBES_T16_BRANCH_COND),
    823
    824	/*
    825	 * Unconditional branch
    826	 * B				1110 0xxx xxxx xxxx
    827	 */
    828	DECODE_SIMULATE	(0xf800, 0xe000, PROBES_T16_BRANCH),
    829
    830	DECODE_END
    831};
    832#ifdef CONFIG_ARM_KPROBES_TEST_MODULE
    833EXPORT_SYMBOL_GPL(probes_decode_thumb16_table);
    834#endif
    835
    836static unsigned long __kprobes thumb_check_cc(unsigned long cpsr)
    837{
    838	if (unlikely(in_it_block(cpsr)))
    839		return probes_condition_checks[current_cond(cpsr)](cpsr);
    840	return true;
    841}
    842
    843static void __kprobes thumb16_singlestep(probes_opcode_t opcode,
    844		struct arch_probes_insn *asi,
    845		struct pt_regs *regs)
    846{
    847	regs->ARM_pc += 2;
    848	asi->insn_handler(opcode, asi, regs);
    849	regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
    850}
    851
    852static void __kprobes thumb32_singlestep(probes_opcode_t opcode,
    853		struct arch_probes_insn *asi,
    854		struct pt_regs *regs)
    855{
    856	regs->ARM_pc += 4;
    857	asi->insn_handler(opcode, asi, regs);
    858	regs->ARM_cpsr = it_advance(regs->ARM_cpsr);
    859}
    860
    861enum probes_insn __kprobes
    862thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
    863			   bool emulate, const union decode_action *actions,
    864			   const struct decode_checker *checkers[])
    865{
    866	asi->insn_singlestep = thumb16_singlestep;
    867	asi->insn_check_cc = thumb_check_cc;
    868	return probes_decode_insn(insn, asi, probes_decode_thumb16_table, true,
    869				  emulate, actions, checkers);
    870}
    871
    872enum probes_insn __kprobes
    873thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi,
    874			   bool emulate, const union decode_action *actions,
    875			   const struct decode_checker *checkers[])
    876{
    877	asi->insn_singlestep = thumb32_singlestep;
    878	asi->insn_check_cc = thumb_check_cc;
    879	return probes_decode_insn(insn, asi, probes_decode_thumb32_table, true,
    880				  emulate, actions, checkers);
    881}