mirror of https://github.com/acidanthera/audk.git
1057 lines
45 KiB
C
1057 lines
45 KiB
C
/** @file
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Thumb Disassembler. Still a work in progress.
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Wrong output is a bug, so please fix it.
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Hex output means there is not yet an entry or a decode bug.
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gOpThumb[] are Thumb 16-bit, and gOpThumb2[] work on the 32-bit
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16-bit stream of Thumb2 instruction. Then there are big case
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statements to print everything out. If you are adding instructions
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try to reuse existing case entries if possible.
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Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PrintLib.h>
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extern CHAR8 *gCondition[];
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extern CHAR8 *gReg[];
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// Thumb address modes
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#define LOAD_STORE_FORMAT1 1
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#define LOAD_STORE_FORMAT1_H 101
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#define LOAD_STORE_FORMAT1_B 111
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#define LOAD_STORE_FORMAT2 2
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#define LOAD_STORE_FORMAT3 3
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#define LOAD_STORE_FORMAT4 4
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#define LOAD_STORE_MULTIPLE_FORMAT1 5
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#define PUSH_FORMAT 6
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#define POP_FORMAT 106
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#define IMMED_8 7
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#define CONDITIONAL_BRANCH 8
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#define UNCONDITIONAL_BRANCH 9
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#define UNCONDITIONAL_BRANCH_SHORT 109
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#define BRANCH_EXCHANGE 10
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#define DATA_FORMAT1 11
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#define DATA_FORMAT2 12
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#define DATA_FORMAT3 13
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#define DATA_FORMAT4 14
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#define DATA_FORMAT5 15
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#define DATA_FORMAT6_SP 16
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#define DATA_FORMAT6_PC 116
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#define DATA_FORMAT7 17
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#define DATA_FORMAT8 19
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#define CPS_FORMAT 20
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#define ENDIAN_FORMAT 21
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#define DATA_CBZ 22
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#define ADR_FORMAT 23
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#define IT_BLOCK 24
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// Thumb2 address modes
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#define B_T3 200
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#define B_T4 201
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#define BL_T2 202
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#define POP_T2 203
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#define POP_T3 204
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#define STM_FORMAT 205
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#define LDM_REG_IMM12_SIGNED 206
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#define LDM_REG_IMM12_LSL 207
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#define LDM_REG_IMM8 208
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#define LDM_REG_IMM12 209
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#define LDM_REG_INDIRECT_LSL 210
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#define LDM_REG_IMM8_SIGNED 211
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#define LDRD_REG_IMM8 212
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#define LDREXB 213
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#define LDREXD 214
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#define SRS_FORMAT 215
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#define RFE_FORMAT 216
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#define LDRD_REG_IMM8_SIGNED 217
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#define ADD_IMM12 218
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#define ADD_IMM5 219
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#define ADR_THUMB2 220
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#define CMN_THUMB2 221
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#define ASR_IMM5 222
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#define ASR_3REG 223
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#define BFC_THUMB2 224
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#define CDP_THUMB2 225
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#define THUMB2_NO_ARGS 226
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#define THUMB2_2REGS 227
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#define ADD_IMM5_2REG 228
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#define CPD_THUMB2 229
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#define THUMB2_4REGS 230
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#define ADD_IMM12_1REG 231
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#define THUMB2_IMM16 232
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#define MRC_THUMB2 233
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#define MRRC_THUMB2 234
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#define THUMB2_MRS 235
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#define THUMB2_MSR 236
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typedef struct {
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CHAR8 *Start;
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UINT32 OpCode;
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UINT32 Mask;
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UINT32 AddressMode;
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} THUMB_INSTRUCTIONS;
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THUMB_INSTRUCTIONS gOpThumb[] = {
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// Thumb 16-bit instructions
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// Op Mask Format
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{ "ADC" , 0x4140, 0xffc0, DATA_FORMAT5 }, // ADC <Rndn>, <Rm>
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{ "ADR", 0xa000, 0xf800, ADR_FORMAT }, // ADR <Rd>, <label>
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{ "ADD" , 0x1c00, 0xfe00, DATA_FORMAT2 },
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{ "ADD" , 0x3000, 0xf800, DATA_FORMAT3 },
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{ "ADD" , 0x1800, 0xfe00, DATA_FORMAT1 },
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{ "ADD" , 0x4400, 0xff00, DATA_FORMAT8 }, // A8.6.9
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{ "ADD" , 0xa000, 0xf100, DATA_FORMAT6_PC },
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{ "ADD" , 0xa800, 0xf800, DATA_FORMAT6_SP },
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{ "ADD" , 0xb000, 0xff80, DATA_FORMAT7 },
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{ "AND" , 0x4000, 0xffc0, DATA_FORMAT5 },
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{ "ASR" , 0x1000, 0xf800, DATA_FORMAT4 },
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{ "ASR" , 0x4100, 0xffc0, DATA_FORMAT5 },
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{ "B" , 0xd000, 0xf000, CONDITIONAL_BRANCH },
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{ "B" , 0xe000, 0xf800, UNCONDITIONAL_BRANCH_SHORT },
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{ "BLX" , 0x4780, 0xff80, BRANCH_EXCHANGE },
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{ "BX" , 0x4700, 0xff87, BRANCH_EXCHANGE },
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{ "BIC" , 0x4380, 0xffc0, DATA_FORMAT5 },
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{ "BKPT", 0xdf00, 0xff00, IMMED_8 },
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{ "CBZ", 0xb100, 0xfd00, DATA_CBZ },
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{ "CBNZ", 0xb900, 0xfd00, DATA_CBZ },
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{ "CMN" , 0x42c0, 0xffc0, DATA_FORMAT5 },
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{ "CMP" , 0x2800, 0xf800, DATA_FORMAT3 },
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{ "CMP" , 0x4280, 0xffc0, DATA_FORMAT5 },
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{ "CMP" , 0x4500, 0xff00, DATA_FORMAT8 },
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{ "CPS" , 0xb660, 0xffe8, CPS_FORMAT },
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{ "MOV" , 0x4600, 0xff00, DATA_FORMAT8 },
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{ "EOR" , 0x4040, 0xffc0, DATA_FORMAT5 },
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{ "LDMIA" , 0xc800, 0xf800, LOAD_STORE_MULTIPLE_FORMAT1 },
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{ "LDR" , 0x6800, 0xf800, LOAD_STORE_FORMAT1 }, // LDR <Rt>, [<Rn> {,#<imm>}]
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{ "LDR" , 0x5800, 0xfe00, LOAD_STORE_FORMAT2 }, // STR <Rt>, [<Rn>, <Rm>]
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{ "LDR" , 0x4800, 0xf800, LOAD_STORE_FORMAT3 },
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{ "LDR" , 0x9800, 0xf800, LOAD_STORE_FORMAT4 }, // LDR <Rt>, [SP, #<imm>]
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{ "LDRB" , 0x7800, 0xf800, LOAD_STORE_FORMAT1_B },
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{ "LDRB" , 0x5c00, 0xfe00, LOAD_STORE_FORMAT2 }, // STR <Rt>, [<Rn>, <Rm>]
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{ "LDRH" , 0x8800, 0xf800, LOAD_STORE_FORMAT1_H },
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{ "LDRH" , 0x7a00, 0xfe00, LOAD_STORE_FORMAT2 },
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{ "LDRSB" , 0x5600, 0xfe00, LOAD_STORE_FORMAT2 }, // STR <Rt>, [<Rn>, <Rm>]
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{ "LDRSH" , 0x5e00, 0xfe00, LOAD_STORE_FORMAT2 },
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{ "MOVS", 0x0000, 0xffc0, DATA_FORMAT5 }, // LSL with imm5 == 0 is a MOVS, so this must go before LSL
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{ "LSL" , 0x0000, 0xf800, DATA_FORMAT4 },
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{ "LSL" , 0x4080, 0xffc0, DATA_FORMAT5 },
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{ "LSR" , 0x0001, 0xf800, DATA_FORMAT4 },
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{ "LSR" , 0x40c0, 0xffc0, DATA_FORMAT5 },
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{ "LSRS", 0x0800, 0xf800, DATA_FORMAT4 }, // LSRS <Rd>, <Rm>, #<imm5>
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{ "MOVS", 0x2000, 0xf800, DATA_FORMAT3 },
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{ "MOV" , 0x1c00, 0xffc0, DATA_FORMAT3 },
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{ "MOV" , 0x4600, 0xff00, DATA_FORMAT8 },
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{ "MUL" , 0x4340, 0xffc0, DATA_FORMAT5 },
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{ "MVN" , 0x41c0, 0xffc0, DATA_FORMAT5 },
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{ "NEG" , 0x4240, 0xffc0, DATA_FORMAT5 },
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{ "ORR" , 0x4300, 0xffc0, DATA_FORMAT5 },
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{ "POP" , 0xbc00, 0xfe00, POP_FORMAT },
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{ "PUSH", 0xb400, 0xfe00, PUSH_FORMAT },
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{ "REV" , 0xba00, 0xffc0, DATA_FORMAT5 },
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{ "REV16" , 0xba40, 0xffc0, DATA_FORMAT5 },
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{ "REVSH" , 0xbac0, 0xffc0, DATA_FORMAT5 },
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{ "ROR" , 0x41c0, 0xffc0, DATA_FORMAT5 },
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{ "SBC" , 0x4180, 0xffc0, DATA_FORMAT5 },
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{ "SETEND" , 0xb650, 0xfff0, ENDIAN_FORMAT },
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{ "STMIA" , 0xc000, 0xf800, LOAD_STORE_MULTIPLE_FORMAT1 },
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{ "STR" , 0x6000, 0xf800, LOAD_STORE_FORMAT1 }, // STR <Rt>, [<Rn> {,#<imm>}]
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{ "STR" , 0x5000, 0xfe00, LOAD_STORE_FORMAT2 }, // STR <Rt>, [<Rn>, <Rm>]
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{ "STR" , 0x9000, 0xf800, LOAD_STORE_FORMAT4 }, // STR <Rt>, [SP, #<imm>]
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{ "STRB" , 0x7000, 0xf800, LOAD_STORE_FORMAT1_B }, // STRB <Rt>, [<Rn>, #<imm5>]
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{ "STRB" , 0x5400, 0xfe00, LOAD_STORE_FORMAT2 }, // STRB <Rt>, [<Rn>, <Rm>]
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{ "STRH" , 0x8000, 0xf800, LOAD_STORE_FORMAT1_H }, // STRH <Rt>, [<Rn>{,#<imm>}]
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{ "STRH" , 0x5200, 0xfe00, LOAD_STORE_FORMAT2 }, // STRH <Rt>, [<Rn>, <Rm>]
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{ "SUB" , 0x1e00, 0xfe00, DATA_FORMAT2 },
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{ "SUB" , 0x3800, 0xf800, DATA_FORMAT3 },
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{ "SUB" , 0x1a00, 0xfe00, DATA_FORMAT1 },
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{ "SUB" , 0xb080, 0xff80, DATA_FORMAT7 },
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{ "SBC" , 0x4180, 0xffc0, DATA_FORMAT5 },
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{ "SWI" , 0xdf00, 0xff00, IMMED_8 },
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{ "SXTB", 0xb240, 0xffc0, DATA_FORMAT5 },
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{ "SXTH", 0xb200, 0xffc0, DATA_FORMAT5 },
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{ "TST" , 0x4200, 0xffc0, DATA_FORMAT5 },
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{ "UXTB", 0xb2c0, 0xffc0, DATA_FORMAT5 },
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{ "UXTH", 0xb280, 0xffc0, DATA_FORMAT5 },
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{ "IT", 0xbf00, 0xff00, IT_BLOCK }
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};
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THUMB_INSTRUCTIONS gOpThumb2[] = {
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//Instruct OpCode OpCode Mask Addressig Mode
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{ "ADR", 0xf2af0000, 0xfbff8000, ADR_THUMB2 }, // ADDR <Rd>, <label> ;Needs to go before ADDW
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{ "CMN", 0xf1100f00, 0xfff08f00, CMN_THUMB2 }, // CMN <Rn>, #<const> ;Needs to go before ADD
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{ "CMN", 0xeb100f00, 0xfff08f00, ADD_IMM5_2REG }, // CMN <Rn>, <Rm> {,<shift> #<const>}
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{ "CMP", 0xf1a00f00, 0xfff08f00, CMN_THUMB2 }, // CMP <Rn>, #<const>
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{ "TEQ", 0xf0900f00, 0xfff08f00, CMN_THUMB2 }, // CMP <Rn>, #<const>
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{ "TEQ", 0xea900f00, 0xfff08f00, ADD_IMM5_2REG }, // CMN <Rn>, <Rm> {,<shift> #<const>}
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{ "TST", 0xf0100f00, 0xfff08f00, CMN_THUMB2 }, // CMP <Rn>, #<const>
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{ "TST", 0xea100f00, 0xfff08f00, ADD_IMM5_2REG }, // TST <Rn>, <Rm> {,<shift> #<const>}
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{ "MOV", 0xf04f0000, 0xfbef8000, ADD_IMM12_1REG }, // MOV <Rd>, #<const>
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{ "MOVW", 0xf2400000, 0xfbe08000, THUMB2_IMM16 }, // MOVW <Rd>, #<const>
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{ "MOVT", 0xf2c00000, 0xfbe08000, THUMB2_IMM16 }, // MOVT <Rd>, #<const>
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{ "ADC", 0xf1400000, 0xfbe08000, ADD_IMM12 }, // ADC{S} <Rd>, <Rn>, #<const>
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{ "ADC", 0xeb400000, 0xffe08000, ADD_IMM5 }, // ADC{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "ADD", 0xf1000000, 0xfbe08000, ADD_IMM12 }, // ADD{S} <Rd>, <Rn>, #<const>
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{ "ADD", 0xeb000000, 0xffe08000, ADD_IMM5 }, // ADD{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "ADDW", 0xf2000000, 0xfbe08000, ADD_IMM12 }, // ADDW{S} <Rd>, <Rn>, #<const>
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{ "AND", 0xf0000000, 0xfbe08000, ADD_IMM12 }, // AND{S} <Rd>, <Rn>, #<const>
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{ "AND", 0xea000000, 0xffe08000, ADD_IMM5 }, // AND{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "BIC", 0xf0200000, 0xfbe08000, ADD_IMM12 }, // BIC{S} <Rd>, <Rn>, #<const>
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{ "BIC", 0xea200000, 0xffe08000, ADD_IMM5 }, // BIC{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "EOR", 0xf0800000, 0xfbe08000, ADD_IMM12 }, // EOR{S} <Rd>, <Rn>, #<const>
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{ "EOR", 0xea800000, 0xffe08000, ADD_IMM5 }, // EOR{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "ORN", 0xf0600000, 0xfbe08000, ADD_IMM12 }, // ORN{S} <Rd>, <Rn>, #<const>
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{ "ORN", 0xea600000, 0xffe08000, ADD_IMM5 }, // ORN{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "ORR", 0xf0400000, 0xfbe08000, ADD_IMM12 }, // ORR{S} <Rd>, <Rn>, #<const>
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{ "ORR", 0xea400000, 0xffe08000, ADD_IMM5 }, // ORR{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "RSB", 0xf1c00000, 0xfbe08000, ADD_IMM12 }, // RSB{S} <Rd>, <Rn>, #<const>
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{ "RSB", 0xebc00000, 0xffe08000, ADD_IMM5 }, // RSB{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "SBC", 0xf1600000, 0xfbe08000, ADD_IMM12 }, // SBC{S} <Rd>, <Rn>, #<const>
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{ "SBC", 0xeb600000, 0xffe08000, ADD_IMM5 }, // SBC{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "SUB", 0xf1a00000, 0xfbe08000, ADD_IMM12 }, // SUB{S} <Rd>, <Rn>, #<const>
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{ "SUB", 0xeba00000, 0xffe08000, ADD_IMM5 }, // SUB{S} <Rd>, <Rn>, <Rm> {,<shift> #<const>}
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{ "ASR", 0xea4f0020, 0xffef8030, ASR_IMM5 }, // ARS <Rd>, <Rm> #<const>} imm3:imm2
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{ "ASR", 0xfa40f000, 0xffe0f0f0, ASR_3REG }, // ARS <Rd>, <Rn>, <Rm>
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{ "LSR", 0xea4f0010, 0xffef8030, ASR_IMM5 }, // LSR <Rd>, <Rm> #<const>} imm3:imm2
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{ "LSR", 0xfa20f000, 0xffe0f0f0, ASR_3REG }, // LSR <Rd>, <Rn>, <Rm>
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{ "ROR", 0xea4f0030, 0xffef8030, ASR_IMM5 }, // ROR <Rd>, <Rm> #<const>} imm3:imm2
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{ "ROR", 0xfa60f000, 0xffe0f0f0, ASR_3REG }, // ROR <Rd>, <Rn>, <Rm>
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{ "BFC", 0xf36f0000, 0xffff8010, BFC_THUMB2 }, // BFC <Rd>, #<lsb>, #<width>
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{ "BIC", 0xf3600000, 0xfff08010, BFC_THUMB2 }, // BIC <Rn>, <Rd>, #<lsb>, #<width>
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{ "SBFX", 0xf3400000, 0xfff08010, BFC_THUMB2 }, // SBFX <Rn>, <Rd>, #<lsb>, #<width>
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{ "UBFX", 0xf3c00000, 0xfff08010, BFC_THUMB2 }, // UBFX <Rn>, <Rd>, #<lsb>, #<width>
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{ "CPD", 0xee000000, 0xff000010, CPD_THUMB2 }, // CPD <coproc>,<opc1>,<CRd>,<CRn>,<CRm>,<opc2>
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{ "CPD2", 0xfe000000, 0xff000010, CPD_THUMB2 }, // CPD <coproc>,<opc1>,<CRd>,<CRn>,<CRm>,<opc2>
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{ "MRC", 0xee100000, 0xff100000, MRC_THUMB2 }, // MRC <coproc>,<opc1>,<Rt>,<CRn>,<CRm>,<opc2>
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{ "MRC2", 0xfe100000, 0xff100000, MRC_THUMB2 }, // MRC2 <coproc>,<opc1>,<Rt>,<CRn>,<CRm>,<opc2>
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{ "MRRC", 0xec500000, 0xfff00000, MRRC_THUMB2 }, // MRRC <coproc>,<opc1>,<Rt>,<Rt2>,<CRm>
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{ "MRRC2", 0xfc500000, 0xfff00000, MRRC_THUMB2 }, // MRR2 <coproc>,<opc1>,<Rt>,<Rt2>,<CRm>
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{ "MRS", 0xf3ef8000, 0xfffff0ff, THUMB2_MRS }, // MRS <Rd>, CPSR
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{ "MSR", 0xf3808000, 0xfff0fcff, THUMB2_MSR }, // MSR CPSR_fs, <Rn>
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{ "CLREX", 0xf3bf8f2f, 0xfffffff, THUMB2_NO_ARGS }, // CLREX
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{ "CLZ", 0xfab0f080, 0xfff0f0f0, THUMB2_2REGS }, // CLZ <Rd>,<Rm>
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{ "MOV", 0xec4f0000, 0xfff0f0f0, THUMB2_2REGS }, // MOV <Rd>,<Rm>
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{ "MOVS", 0xec5f0000, 0xfff0f0f0, THUMB2_2REGS }, // MOVS <Rd>,<Rm>
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{ "RBIT", 0xfb90f0a0, 0xfff0f0f0, THUMB2_2REGS }, // RBIT <Rd>,<Rm>
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{ "REV", 0xfb90f080, 0xfff0f0f0, THUMB2_2REGS }, // REV <Rd>,<Rm>
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{ "REV16", 0xfa90f090, 0xfff0f0f0, THUMB2_2REGS }, // REV16 <Rd>,<Rm>
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{ "REVSH", 0xfa90f0b0, 0xfff0f0f0, THUMB2_2REGS }, // REVSH <Rd>,<Rm>
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{ "RRX", 0xea4f0030, 0xfffff0f0, THUMB2_2REGS }, // RRX <Rd>,<Rm>
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{ "RRXS", 0xea5f0030, 0xfffff0f0, THUMB2_2REGS }, // RRXS <Rd>,<Rm>
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{ "MLA", 0xfb000000, 0xfff000f0, THUMB2_4REGS }, // MLA <Rd>, <Rn>, <Rm>, <Ra>
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{ "MLS", 0xfb000010, 0xfff000f0, THUMB2_4REGS }, // MLA <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLABB", 0xfb100000, 0xfff000f0, THUMB2_4REGS }, // SMLABB <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLABT", 0xfb100010, 0xfff000f0, THUMB2_4REGS }, // SMLABT <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLABB", 0xfb100020, 0xfff000f0, THUMB2_4REGS }, // SMLATB <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLATT", 0xfb100030, 0xfff000f0, THUMB2_4REGS }, // SMLATT <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLAWB", 0xfb300000, 0xfff000f0, THUMB2_4REGS }, // SMLAWB <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLAWT", 0xfb300010, 0xfff000f0, THUMB2_4REGS }, // SMLAWT <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLSD", 0xfb400000, 0xfff000f0, THUMB2_4REGS }, // SMLSD <Rd>, <Rn>, <Rm>, <Ra>
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{ "SMLSDX", 0xfb400010, 0xfff000f0, THUMB2_4REGS }, // SMLSDX <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMMLA", 0xfb500000, 0xfff000f0, THUMB2_4REGS }, // SMMLA <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMMLAR", 0xfb500010, 0xfff000f0, THUMB2_4REGS }, // SMMLAR <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMMLS", 0xfb600000, 0xfff000f0, THUMB2_4REGS }, // SMMLS <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMMLSR", 0xfb600010, 0xfff000f0, THUMB2_4REGS }, // SMMLSR <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "USADA8", 0xfb700000, 0xfff000f0, THUMB2_4REGS }, // USADA8 <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMLAD", 0xfb200000, 0xfff000f0, THUMB2_4REGS }, // SMLAD <Rd>, <Rn>, <Rm>, <Ra>
|
|
{ "SMLADX", 0xfb200010, 0xfff000f0, THUMB2_4REGS }, // SMLADX <Rd>, <Rn>, <Rm>, <Ra>
|
|
|
|
|
|
{ "B", 0xf0008000, 0xf800d000, B_T3 }, // B<c> <label>
|
|
{ "B", 0xf0009000, 0xf800d000, B_T4 }, // B<c> <label>
|
|
{ "BL", 0xf000d000, 0xf800d000, B_T4 }, // BL<c> <label>
|
|
{ "BLX", 0xf000c000, 0xf800d000, BL_T2 }, // BLX<c> <label>
|
|
|
|
{ "POP", 0xe8bd0000, 0xffff2000, POP_T2 }, // POP <registers>
|
|
{ "POP", 0xf85d0b04, 0xffff0fff, POP_T3 }, // POP <register>
|
|
{ "PUSH", 0xe8ad0000, 0xffffa000, POP_T2 }, // PUSH <registers>
|
|
{ "PUSH", 0xf84d0d04, 0xffff0fff, POP_T3 }, // PUSH <register>
|
|
{ "STM" , 0xe8800000, 0xffd0a000, STM_FORMAT }, // STM <Rn>{!},<registers>
|
|
{ "STMDB", 0xe9800000, 0xffd0a000, STM_FORMAT }, // STMDB <Rn>{!},<registers>
|
|
{ "LDM" , 0xe8900000, 0xffd02000, STM_FORMAT }, // LDM <Rn>{!},<registers>
|
|
{ "LDMDB", 0xe9100000, 0xffd02000, STM_FORMAT }, // LDMDB <Rn>{!},<registers>
|
|
|
|
{ "LDR", 0xf8d00000, 0xfff00000, LDM_REG_IMM12 }, // LDR <rt>, [<rn>, {, #<imm12>]}
|
|
{ "LDRB", 0xf8900000, 0xfff00000, LDM_REG_IMM12 }, // LDRB <rt>, [<rn>, {, #<imm12>]}
|
|
{ "LDRH", 0xf8b00000, 0xfff00000, LDM_REG_IMM12 }, // LDRH <rt>, [<rn>, {, #<imm12>]}
|
|
{ "LDRSB", 0xf9900000, 0xfff00000, LDM_REG_IMM12 }, // LDRSB <rt>, [<rn>, {, #<imm12>]}
|
|
{ "LDRSH", 0xf9b00000, 0xfff00000, LDM_REG_IMM12 }, // LDRSH <rt>, [<rn>, {, #<imm12>]}
|
|
|
|
{ "LDR", 0xf85f0000, 0xff7f0000, LDM_REG_IMM12_SIGNED }, // LDR <Rt>, <label>
|
|
{ "LDRB", 0xf81f0000, 0xff7f0000, LDM_REG_IMM12_SIGNED }, // LDRB <Rt>, <label>
|
|
{ "LDRH", 0xf83f0000, 0xff7f0000, LDM_REG_IMM12_SIGNED }, // LDRH <Rt>, <label>
|
|
{ "LDRSB", 0xf91f0000, 0xff7f0000, LDM_REG_IMM12_SIGNED }, // LDRSB <Rt>, <label>
|
|
{ "LDRSH", 0xf93f0000, 0xff7f0000, LDM_REG_IMM12_SIGNED }, // LDRSB <Rt>, <label>
|
|
|
|
{ "LDR", 0xf8500000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // LDR <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "LDRB", 0xf8100000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // LDRB <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "LDRH", 0xf8300000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // LDRH <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "LDRSB", 0xf9100000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // LDRSB <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "LDRSH", 0xf9300000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // LDRSH <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
|
|
{ "LDR", 0xf8500800, 0xfff00800, LDM_REG_IMM8 }, // LDR <rt>, [<rn>, {, #<imm8>]}
|
|
{ "LDRBT", 0xf8100e00, 0xfff00f00, LDM_REG_IMM8 }, // LDRBT <rt>, [<rn>, {, #<imm8>]}
|
|
{ "LDRHT", 0xf8300e00, 0xfff00f00, LDM_REG_IMM8 }, // LDRHT <rt>, [<rn>, {, #<imm8>]}
|
|
{ "LDRSB", 0xf9100800, 0xfff00800, LDM_REG_IMM8 }, // LDRHT <rt>, [<rn>, {, #<imm8>]} {!} form?
|
|
{ "LDRSBT",0xf9100e00, 0xfff00f00, LDM_REG_IMM8 }, // LDRHBT <rt>, [<rn>, {, #<imm8>]} {!} form?
|
|
{ "LDRSH" ,0xf9300800, 0xfff00800, LDM_REG_IMM8 }, // LDRSH <rt>, [<rn>, {, #<imm8>]}
|
|
{ "LDRSHT",0xf9300e00, 0xfff00f00, LDM_REG_IMM8 }, // LDRSHT <rt>, [<rn>, {, #<imm8>]}
|
|
{ "LDRT", 0xf8500e00, 0xfff00f00, LDM_REG_IMM8 }, // LDRT <rt>, [<rn>, {, #<imm8>]}
|
|
|
|
{ "LDRD", 0xe8500000, 0xfe500000, LDRD_REG_IMM8_SIGNED }, // LDRD <rt>, <rt2>, [<rn>, {, #<imm8>]}{!}
|
|
{ "LDRD", 0xe8500000, 0xfe500000, LDRD_REG_IMM8 }, // LDRD <rt>, <rt2>, <label>
|
|
|
|
{ "LDREX", 0xe8500f00, 0xfff00f00, LDM_REG_IMM8 }, // LDREX <Rt>, [Rn, {#imm8}]]
|
|
{ "LDREXB", 0xe8d00f4f, 0xfff00fff, LDREXB }, // LDREXB <Rt>, [<Rn>]
|
|
{ "LDREXH", 0xe8d00f5f, 0xfff00fff, LDREXB }, // LDREXH <Rt>, [<Rn>]
|
|
|
|
{ "LDREXD", 0xe8d00f4f, 0xfff00fff, LDREXD }, // LDREXD <Rt>, <Rt2>, [<Rn>]
|
|
|
|
{ "STR", 0xf8c00000, 0xfff00000, LDM_REG_IMM12 }, // STR <rt>, [<rn>, {, #<imm12>]}
|
|
{ "STRB", 0xf8800000, 0xfff00000, LDM_REG_IMM12 }, // STRB <rt>, [<rn>, {, #<imm12>]}
|
|
{ "STRH", 0xf8a00000, 0xfff00000, LDM_REG_IMM12 }, // STRH <rt>, [<rn>, {, #<imm12>]}
|
|
|
|
{ "STR", 0xf8400000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // STR <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "STRB", 0xf8000000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // STRB <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
{ "STRH", 0xf8200000, 0xfff00fc0, LDM_REG_INDIRECT_LSL }, // STRH <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
|
|
{ "STR", 0xf8400800, 0xfff00800, LDM_REG_IMM8 }, // STR <rt>, [<rn>, {, #<imm8>]}
|
|
{ "STRH", 0xf8200800, 0xfff00800, LDM_REG_IMM8 }, // STRH <rt>, [<rn>, {, #<imm8>]}
|
|
{ "STRBT", 0xf8000e00, 0xfff00f00, LDM_REG_IMM8 }, // STRBT <rt>, [<rn>, {, #<imm8>]}
|
|
{ "STRHT", 0xf8200e00, 0xfff00f00, LDM_REG_IMM8 }, // STRHT <rt>, [<rn>, {, #<imm8>]}
|
|
{ "STRT", 0xf8400e00, 0xfff00f00, LDM_REG_IMM8 }, // STRT <rt>, [<rn>, {, #<imm8>]}
|
|
|
|
{ "STRD", 0xe8400000, 0xfe500000, LDRD_REG_IMM8_SIGNED }, // STRD <rt>, <rt2>, [<rn>, {, #<imm8>]}{!}
|
|
|
|
{ "STREX", 0xe8400f00, 0xfff00f00, LDM_REG_IMM8 }, // STREX <Rt>, [Rn, {#imm8}]]
|
|
{ "STREXB", 0xe8c00f4f, 0xfff00fff, LDREXB }, // STREXB <Rd>, <Rt>, [<Rn>]
|
|
{ "STREXH", 0xe8c00f5f, 0xfff00fff, LDREXB }, // STREXH <Rd>, <Rt>, [<Rn>]
|
|
|
|
{ "STREXD", 0xe8d00f4f, 0xfff00fff, LDREXD }, // STREXD <Rd>, <Rt>, <Rt2>, [<Rn>]
|
|
|
|
{ "SRSDB", 0xe80dc000, 0xffdffff0, SRS_FORMAT }, // SRSDB<c> SP{!},#<mode>
|
|
{ "SRS" , 0xe98dc000, 0xffdffff0, SRS_FORMAT }, // SRS{IA}<c> SP{!},#<mode>
|
|
{ "RFEDB", 0xe810c000, 0xffd0ffff, RFE_FORMAT }, // RFEDB<c> <Rn>{!}
|
|
{ "RFE" , 0xe990c000, 0xffd0ffff, RFE_FORMAT } // RFE{IA}<c> <Rn>{!}
|
|
};
|
|
|
|
CHAR8 *gShiftType[] = {
|
|
"LSL",
|
|
"LSR",
|
|
"ASR",
|
|
"ROR"
|
|
};
|
|
|
|
CHAR8 mThumbMregListStr[4*15 + 1];
|
|
|
|
CHAR8 *
|
|
ThumbMRegList (
|
|
UINT32 RegBitMask
|
|
)
|
|
{
|
|
UINTN Index, Start, End;
|
|
BOOLEAN First;
|
|
|
|
mThumbMregListStr[0] = '\0';
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, "{");
|
|
|
|
for (Index = 0, First = TRUE; Index <= 15; Index++) {
|
|
if ((RegBitMask & (1 << Index)) != 0) {
|
|
Start = End = Index;
|
|
for (Index++; ((RegBitMask & (1 << Index)) != 0) && (Index <= 9); Index++) {
|
|
End = Index;
|
|
}
|
|
|
|
if (!First) {
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, ",");
|
|
} else {
|
|
First = FALSE;
|
|
}
|
|
|
|
if (Start == End) {
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, gReg[Start]);
|
|
} else {
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, gReg[Start]);
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, "-");
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, gReg[End]);
|
|
}
|
|
}
|
|
}
|
|
if (First) {
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, "ERROR");
|
|
}
|
|
AsciiStrCatS (mThumbMregListStr, sizeof mThumbMregListStr, "}");
|
|
|
|
// BugBug: Make caller pass in buffer it is cleaner
|
|
return mThumbMregListStr;
|
|
}
|
|
|
|
UINT32
|
|
SignExtend32 (
|
|
IN UINT32 Data,
|
|
IN UINT32 TopBit
|
|
)
|
|
{
|
|
if (((Data & TopBit) == 0) || (TopBit == BIT31)) {
|
|
return Data;
|
|
}
|
|
|
|
do {
|
|
TopBit <<= 1;
|
|
Data |= TopBit;
|
|
} while ((TopBit & BIT31) != BIT31);
|
|
|
|
return Data;
|
|
}
|
|
|
|
//
|
|
// Some instructions specify the PC is always considered aligned
|
|
// The PC is after the instruction that is executing. So you pass
|
|
// in the instruction address and you get back the aligned answer
|
|
//
|
|
UINT32
|
|
PCAlign4 (
|
|
IN UINT32 Data
|
|
)
|
|
{
|
|
return (Data + 4) & 0xfffffffc;
|
|
}
|
|
|
|
/**
|
|
Place a disassembly of **OpCodePtr into buffer, and update OpCodePtr to
|
|
point to next instruction.
|
|
|
|
We cheat and only decode instructions that access
|
|
memory. If the instruction is not found we dump the instruction in hex.
|
|
|
|
@param OpCodePtrPtr Pointer to pointer of ARM Thumb instruction to disassemble.
|
|
@param Buf Buffer to sprintf disassembly into.
|
|
@param Size Size of Buf in bytes.
|
|
@param Extended TRUE dump hex for instruction too.
|
|
|
|
**/
|
|
VOID
|
|
DisassembleThumbInstruction (
|
|
IN UINT16 **OpCodePtrPtr,
|
|
OUT CHAR8 *Buf,
|
|
OUT UINTN Size,
|
|
OUT UINT32 *ItBlock,
|
|
IN BOOLEAN Extended
|
|
)
|
|
{
|
|
UINT16 *OpCodePtr;
|
|
UINT16 OpCode;
|
|
UINT32 OpCode32;
|
|
UINT32 Index;
|
|
UINT32 Offset;
|
|
UINT16 Rd, Rn, Rm, Rt, Rt2;
|
|
BOOLEAN H1, H2, imod;
|
|
//BOOLEAN ItFlag;
|
|
UINT32 PC, Target, msbit, lsbit;
|
|
CHAR8 *Cond;
|
|
BOOLEAN S, J1, J2, P, U, W;
|
|
UINT32 coproc, opc1, opc2, CRd, CRn, CRm;
|
|
UINT32 Mask;
|
|
|
|
OpCodePtr = *OpCodePtrPtr;
|
|
OpCode = **OpCodePtrPtr;
|
|
|
|
// Thumb2 is a stream of 16-bit instructions not a 32-bit instruction.
|
|
OpCode32 = (((UINT32)OpCode) << 16) | *(OpCodePtr + 1);
|
|
|
|
// These register names match branch form, but not others
|
|
Rd = OpCode & 0x7;
|
|
Rn = (OpCode >> 3) & 0x7;
|
|
Rm = (OpCode >> 6) & 0x7;
|
|
H1 = (OpCode & BIT7) != 0;
|
|
H2 = (OpCode & BIT6) != 0;
|
|
imod = (OpCode & BIT4) != 0;
|
|
PC = (UINT32)(UINTN)OpCodePtr;
|
|
|
|
// Increment by the minimum instruction size, Thumb2 could be bigger
|
|
*OpCodePtrPtr += 1;
|
|
|
|
// Manage IT Block ItFlag TRUE means we are in an IT block
|
|
/*if (*ItBlock != 0) {
|
|
ItFlag = TRUE;
|
|
*ItBlock -= 1;
|
|
} else {
|
|
ItFlag = FALSE;
|
|
}*/
|
|
|
|
for (Index = 0; Index < sizeof (gOpThumb)/sizeof (THUMB_INSTRUCTIONS); Index++) {
|
|
if ((OpCode & gOpThumb[Index].Mask) == gOpThumb[Index].OpCode) {
|
|
if (Extended) {
|
|
Offset = AsciiSPrint (Buf, Size, "0x%04x %-6a", OpCode, gOpThumb[Index].Start);
|
|
} else {
|
|
Offset = AsciiSPrint (Buf, Size, "%-6a", gOpThumb[Index].Start);
|
|
}
|
|
switch (gOpThumb[Index].AddressMode) {
|
|
case LOAD_STORE_FORMAT1:
|
|
// A6.5.1 <Rd>, [<Rn>, #<5_bit_offset>]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d #0x%x]", Rd, Rn, (OpCode >> 4) & 0x7c);
|
|
return;
|
|
case LOAD_STORE_FORMAT1_H:
|
|
// A6.5.1 <Rd>, [<Rn>, #<5_bit_offset>]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d #0x%x]", Rd, Rn, (OpCode >> 5) & 0x3e);
|
|
return;
|
|
case LOAD_STORE_FORMAT1_B:
|
|
// A6.5.1 <Rd>, [<Rn>, #<5_bit_offset>]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d #0x%x]", Rd, Rn, (OpCode >> 6) & 0x1f);
|
|
return;
|
|
|
|
case LOAD_STORE_FORMAT2:
|
|
// A6.5.1 <Rd>, [<Rn>, <Rm>]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [r%d, r%d]", Rd, Rn, Rm);
|
|
return;
|
|
case LOAD_STORE_FORMAT3:
|
|
// A6.5.1 <Rd>, [PC, #<8_bit_offset>]
|
|
Target = (OpCode & 0xff) << 2;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [pc, #0x%x] ;0x%08x", (OpCode >> 8) & 7, Target, PCAlign4 (PC) + Target);
|
|
return;
|
|
case LOAD_STORE_FORMAT4:
|
|
// Rt, [SP, #imm8]
|
|
Target = (OpCode & 0xff) << 2;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, [sp, #0x%x]", (OpCode >> 8) & 7, Target);
|
|
return;
|
|
|
|
case LOAD_STORE_MULTIPLE_FORMAT1:
|
|
// <Rn>!, {r0-r7}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d!, %a", (OpCode >> 8) & 7, ThumbMRegList (OpCode & 0xff));
|
|
return;
|
|
|
|
case POP_FORMAT:
|
|
// POP {r0-r7,pc}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", ThumbMRegList ((OpCode & 0xff) | ((OpCode & BIT8) == BIT8 ? BIT15 : 0)));
|
|
return;
|
|
|
|
case PUSH_FORMAT:
|
|
// PUSH {r0-r7,lr}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", ThumbMRegList ((OpCode & 0xff) | ((OpCode & BIT8) == BIT8 ? BIT14 : 0)));
|
|
return;
|
|
|
|
|
|
case IMMED_8:
|
|
// A6.7 <immed_8>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%x", OpCode & 0xff);
|
|
return;
|
|
|
|
case CONDITIONAL_BRANCH:
|
|
// A6.3.1 B<cond> <target_address>
|
|
// Patch in the condition code. A little hack but based on "%-6a"
|
|
Cond = gCondition[(OpCode >> 8) & 0xf];
|
|
Buf[Offset-5] = *Cond++;
|
|
Buf[Offset-4] = *Cond;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 4 + SignExtend32 ((OpCode & 0xff) << 1, BIT8));
|
|
return;
|
|
case UNCONDITIONAL_BRANCH_SHORT:
|
|
// A6.3.2 B <target_address>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%04x", PC + 4 + SignExtend32 ((OpCode & 0x3ff) << 1, BIT11));
|
|
return;
|
|
|
|
case BRANCH_EXCHANGE:
|
|
// A6.3.3 BX|BLX <Rm>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", gReg[Rn | (H2 ? 8:0)]);
|
|
return;
|
|
|
|
case DATA_FORMAT1:
|
|
// A6.4.3 <Rd>, <Rn>, <Rm>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, r%d", Rd, Rn, Rm);
|
|
return;
|
|
case DATA_FORMAT2:
|
|
// A6.4.3 <Rd>, <Rn>, #3_bit_immed
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, 0x%x", Rd, Rn, Rm);
|
|
return;
|
|
case DATA_FORMAT3:
|
|
// A6.4.3 <Rd>|<Rn>, #imm8
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, #0x%x", (OpCode >> 8) & 7, OpCode & 0xff);
|
|
return;
|
|
case DATA_FORMAT4:
|
|
// A6.4.3 <Rd>|<Rm>, #immed_5
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d, 0x%x", Rn, Rd, (OpCode >> 6) & 0x1f);
|
|
return;
|
|
case DATA_FORMAT5:
|
|
// A6.4.3 <Rd>|<Rm>, <Rm>|<Rs>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, r%d", Rd, Rn);
|
|
return;
|
|
case DATA_FORMAT6_SP:
|
|
// A6.4.3 <Rd>, <reg>, #<8_Bit_immed>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, sp, 0x%x", (OpCode >> 8) & 7, (OpCode & 0xff) << 2);
|
|
return;
|
|
case DATA_FORMAT6_PC:
|
|
// A6.4.3 <Rd>, <reg>, #<8_Bit_immed>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " r%d, pc, 0x%x", (OpCode >> 8) & 7, (OpCode & 0xff) << 2);
|
|
return;
|
|
case DATA_FORMAT7:
|
|
// A6.4.3 SP, SP, #<7_Bit_immed>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " sp, sp, 0x%x", (OpCode & 0x7f)*4);
|
|
return;
|
|
case DATA_FORMAT8:
|
|
// A6.4.3 <Rd>|<Rn>, <Rm>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a", gReg[Rd | (H1 ? 8:0)], gReg[Rn | (H2 ? 8:0)]);
|
|
return;
|
|
|
|
case CPS_FORMAT:
|
|
// A7.1.24
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "%a %a%a%a", imod ? "ID":"IE", ((OpCode & BIT2) == 0) ? "":"a", ((OpCode & BIT1) == 0) ? "":"i", ((OpCode & BIT0) == 0) ? "":"f");
|
|
return;
|
|
|
|
case ENDIAN_FORMAT:
|
|
// A7.1.24
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", (OpCode & BIT3) == 0 ? "LE":"BE");
|
|
return;
|
|
|
|
case DATA_CBZ:
|
|
// CB{N}Z <Rn>, <Lable>
|
|
Target = ((OpCode >> 2) & 0x3e) | (((OpCode & BIT9) == BIT9) ? BIT6 : 0);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %08x", gReg[Rd], PC + 4 + Target);
|
|
return;
|
|
|
|
case ADR_FORMAT:
|
|
// ADR <Rd>, <Label>
|
|
Target = (OpCode & 0xff) << 2;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %08x", gReg[(OpCode >> 8) & 7], PCAlign4 (PC) + Target);
|
|
return;
|
|
|
|
case IT_BLOCK:
|
|
// ITSTATE = cond:mask OpCode[7:4]:OpCode[3:0]
|
|
// ITSTATE[7:5] == cond[3:1]
|
|
// ITSTATE[4] == 1st Instruction cond[0]
|
|
// ITSTATE[3] == 2st Instruction cond[0]
|
|
// ITSTATE[2] == 3st Instruction cond[0]
|
|
// ITSTATE[1] == 4st Instruction cond[0]
|
|
// ITSTATE[0] == 1 4 instruction IT block. 0 means 0,1,2 or 3 instructions
|
|
// 1st one in ITSTATE low bits defines the number of instructions
|
|
Mask = (OpCode & 0xf);
|
|
if ((Mask & 0x1) == 0x1) {
|
|
*ItBlock = 4;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, "%a%a%a", (Mask & BIT3)?"T":"E", (Mask & BIT2)?"T":"E", (Mask & BIT1)?"T":"E");
|
|
} else if ((OpCode & 0x3) == 0x2) {
|
|
*ItBlock = 3;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, "%a%a", (Mask & BIT3)?"T":"E", (Mask & BIT2)?"T":"E");
|
|
} else if ((OpCode & 0x7) == 0x4) {
|
|
*ItBlock = 2;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, "%a", (Mask & BIT3)?"T":"E");
|
|
} else if ((OpCode & 0xf) == 0x8) {
|
|
*ItBlock = 1;
|
|
}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", gCondition[(OpCode >> 4) & 0xf]);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Thumb2 are 32-bit instructions
|
|
*OpCodePtrPtr += 1;
|
|
Rt = (OpCode32 >> 12) & 0xf;
|
|
Rt2 = (OpCode32 >> 8) & 0xf;
|
|
Rd = (OpCode32 >> 8) & 0xf;
|
|
Rm = (OpCode32 & 0xf);
|
|
Rn = (OpCode32 >> 16) & 0xf;
|
|
for (Index = 0; Index < sizeof (gOpThumb2)/sizeof (THUMB_INSTRUCTIONS); Index++) {
|
|
if ((OpCode32 & gOpThumb2[Index].Mask) == gOpThumb2[Index].OpCode) {
|
|
if (Extended) {
|
|
Offset = AsciiSPrint (Buf, Size, "0x%04x %-6a", OpCode32, gOpThumb2[Index].Start);
|
|
} else {
|
|
Offset = AsciiSPrint (Buf, Size, " %-6a", gOpThumb2[Index].Start);
|
|
}
|
|
switch (gOpThumb2[Index].AddressMode) {
|
|
case B_T3:
|
|
Cond = gCondition[(OpCode32 >> 22) & 0xf];
|
|
Buf[Offset-5] = *Cond++;
|
|
Buf[Offset-4] = *Cond;
|
|
// S:J2:J1:imm6:imm11:0
|
|
Target = ((OpCode32 << 1) & 0xffe) + ((OpCode32 >> 4) & 0x3f000);
|
|
Target |= ((OpCode32 & BIT11) == BIT11)? BIT19 : 0; // J2
|
|
Target |= ((OpCode32 & BIT13) == BIT13)? BIT18 : 0; // J1
|
|
Target |= ((OpCode32 & BIT26) == BIT26)? BIT20 : 0; // S
|
|
Target = SignExtend32 (Target, BIT20);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", PC + 4 + Target);
|
|
return;
|
|
case B_T4:
|
|
// S:I1:I2:imm10:imm11:0
|
|
Target = ((OpCode32 << 1) & 0xffe) + ((OpCode32 >> 4) & 0x3ff000);
|
|
S = (OpCode32 & BIT26) == BIT26;
|
|
J1 = (OpCode32 & BIT13) == BIT13;
|
|
J2 = (OpCode32 & BIT11) == BIT11;
|
|
Target |= (!(J2 ^ S) ? BIT22 : 0); // I2
|
|
Target |= (!(J1 ^ S) ? BIT23 : 0); // I1
|
|
Target |= (S ? BIT24 : 0); // S
|
|
Target = SignExtend32 (Target, BIT24);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", PC + 4 + Target);
|
|
return;
|
|
|
|
case BL_T2:
|
|
// BLX S:I1:I2:imm10:imm11:0
|
|
Target = ((OpCode32 << 1) & 0xffc) + ((OpCode32 >> 4) & 0x3ff000);
|
|
S = (OpCode32 & BIT26) == BIT26;
|
|
J1 = (OpCode32 & BIT13) == BIT13;
|
|
J2 = (OpCode32 & BIT11) == BIT11;
|
|
Target |= (!(J2 ^ S) ? BIT23 : 0); // I2
|
|
Target |= (!(J1 ^ S) ? BIT24 : 0); // I1
|
|
Target |= (S ? BIT25 : 0); // S
|
|
Target = SignExtend32 (Target, BIT25);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " 0x%08x", PCAlign4 (PC) + Target);
|
|
return;
|
|
|
|
case POP_T2:
|
|
// <reglist> some must be zero, handled in table
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", ThumbMRegList (OpCode32 & 0xffff));
|
|
return;
|
|
|
|
case POP_T3:
|
|
// <register>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a", gReg[(OpCode32 >> 12) & 0xf]);
|
|
return;
|
|
|
|
case STM_FORMAT:
|
|
// <Rn>{!}, <registers>
|
|
W = (OpCode32 & BIT21) == BIT21;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a%a, %a", gReg[(OpCode32 >> 16) & 0xf], W ? "!":"", ThumbMRegList (OpCode32 & 0xffff));
|
|
return;
|
|
|
|
case LDM_REG_IMM12_SIGNED:
|
|
// <rt>, <label>
|
|
Target = OpCode32 & 0xfff;
|
|
if ((OpCode32 & BIT23) == 0) {
|
|
// U == 0 means subtrack, U == 1 means add
|
|
Target = -Target;
|
|
}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a", gReg[(OpCode32 >> 12) & 0xf], PCAlign4 (PC) + Target);
|
|
return;
|
|
|
|
case LDM_REG_INDIRECT_LSL:
|
|
// <rt>, [<rn>, <rm> {, LSL #<imm2>]}
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, [%a, %a", gReg[Rt], gReg[Rn], gReg[Rm]);
|
|
if (((OpCode32 >> 4) & 3) == 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "]");
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", LSL #%d]", (OpCode32 >> 4) & 3);
|
|
}
|
|
return;
|
|
|
|
case LDM_REG_IMM12:
|
|
// <rt>, [<rn>, {, #<imm12>]}
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, [%a", gReg[Rt], gReg[Rn]);
|
|
if ((OpCode32 & 0xfff) == 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "]");
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", #0x%x]", OpCode32 & 0xfff);
|
|
}
|
|
return;
|
|
|
|
case LDM_REG_IMM8:
|
|
// <rt>, [<rn>, {, #<imm8>}]{!}
|
|
W = (OpCode32 & BIT8) == BIT8;
|
|
U = (OpCode32 & BIT9) == BIT9;
|
|
P = (OpCode32 & BIT10) == BIT10;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, [%a", gReg[Rt], gReg[Rn]);
|
|
if (P) {
|
|
if ((OpCode32 & 0xff) == 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "]%a", W?"!":"");
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", #%a0x%x]%a", U?"":"-" , OpCode32 & 0xff, W?"!":"");
|
|
}
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "], #%a0x%x", U?"":"-", OpCode32 & 0xff);
|
|
}
|
|
return;
|
|
|
|
case LDRD_REG_IMM8_SIGNED:
|
|
// LDRD <rt>, <rt2>, [<rn>, {, #<imm8>]}{!}
|
|
P = (OpCode32 & BIT24) == BIT24; // index = P
|
|
U = (OpCode32 & BIT23) == BIT23;
|
|
W = (OpCode32 & BIT21) == BIT21;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, [%a", gReg[Rt], gReg[Rt2], gReg[Rn]);
|
|
if (P) {
|
|
if ((OpCode32 & 0xff) == 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, "]");
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", #%a0x%x]%a", U?"":"-", (OpCode32 & 0xff) << 2, W?"!":"");
|
|
}
|
|
} else {
|
|
if ((OpCode32 & 0xff) != 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", #%a0x%x", U?"":"-", (OpCode32 & 0xff) << 2);
|
|
}
|
|
}
|
|
return;
|
|
|
|
case LDRD_REG_IMM8:
|
|
// LDRD <rt>, <rt2>, <label>
|
|
Target = (OpCode32 & 0xff) << 2;
|
|
if ((OpCode32 & BIT23) == 0) {
|
|
// U == 0 means subtrack, U == 1 means add
|
|
Target = -Target;
|
|
}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, %a", gReg[Rt], gReg[Rt2], PC + 4 + Target);
|
|
return;
|
|
|
|
case LDREXB:
|
|
// LDREXB <Rt>, [Rn]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, [%a]", gReg[Rt], gReg[Rn]);
|
|
return;
|
|
|
|
case LDREXD:
|
|
// LDREXD <Rt>, <Rt2>, [<Rn>]
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, ,%a, [%a]", gReg[Rt], gReg[Rt2], gReg[Rn]);
|
|
return;
|
|
|
|
case SRS_FORMAT:
|
|
// SP{!}, #<mode>
|
|
W = (OpCode32 & BIT21) == BIT21;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " SP%a, #0x%x", W?"!":"", OpCode32 & 0x1f);
|
|
return;
|
|
|
|
case RFE_FORMAT:
|
|
// <Rn>{!}
|
|
W = (OpCode32 & BIT21) == BIT21;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a%a, #0x%x", gReg[Rn], W?"!":"");
|
|
return;
|
|
|
|
case ADD_IMM12:
|
|
// ADD{S} <Rd>, <Rn>, #<const> i:imm3:imm8
|
|
if ((OpCode32 & BIT20) == BIT20) {
|
|
Buf[Offset - 3] = 'S'; // assume %-6a
|
|
}
|
|
Target = (OpCode32 & 0xff) | ((OpCode32 >> 4) & 0x700) | ((OpCode & BIT26) == BIT26 ? BIT11 : 0);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, #0x%x", gReg[Rd], gReg[Rn], Target);
|
|
return;
|
|
|
|
case ADD_IMM12_1REG:
|
|
// MOV{S} <Rd>, #<const> i:imm3:imm8
|
|
if ((OpCode32 & BIT20) == BIT20) {
|
|
Buf[Offset - 3] = 'S'; // assume %-6a
|
|
}
|
|
Target = (OpCode32 & 0xff) | ((OpCode32 >> 4) & 0x700) | ((OpCode & BIT26) == BIT26 ? BIT11 : 0);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, #0x%x", gReg[Rd], Target);
|
|
return;
|
|
|
|
case THUMB2_IMM16:
|
|
// MOVW <Rd>, #<const> i:imm3:imm8
|
|
Target = (OpCode32 & 0xff) | ((OpCode32 >> 4) & 0x700) | ((OpCode & BIT26) == BIT26 ? BIT11 : 0);
|
|
Target |= ((OpCode32 >> 4) & 0xf0000);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, #0x%x", gReg[Rd], Target);
|
|
return;
|
|
|
|
case ADD_IMM5:
|
|
// ADC{S} <Rd>, <Rn>, <Rm> {,LSL #<const>} imm3:imm2
|
|
if ((OpCode32 & BIT20) == BIT20) {
|
|
Buf[Offset - 3] = 'S'; // assume %-6a
|
|
}
|
|
Target = ((OpCode32 >> 6) & 3) | ((OpCode32 >> 10) & 0x1c0);
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, %a", gReg[Rd], gReg[Rn], gReg[Rm]);
|
|
if (Target != 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", LSL %d", gShiftType[(OpCode >> 5) & 3], Target);
|
|
}
|
|
return;
|
|
|
|
case ADD_IMM5_2REG:
|
|
// CMP <Rn>, <Rm> {,LSL #<const>} imm3:imm2
|
|
Target = ((OpCode32 >> 6) & 3) | ((OpCode32 >> 10) & 0x1c0);
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a", gReg[Rn], gReg[Rm]);
|
|
if (Target != 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ", LSL %d", gShiftType[(OpCode >> 5) & 3], Target);
|
|
}
|
|
|
|
|
|
case ASR_IMM5:
|
|
// ARS <Rd>, <Rm> #<const>} imm3:imm2
|
|
if ((OpCode32 & BIT20) == BIT20) {
|
|
Buf[Offset - 3] = 'S'; // assume %-6a
|
|
}
|
|
Target = ((OpCode32 >> 6) & 3) | ((OpCode32 >> 10) & 0x1c0);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a #%d", gReg[Rd], gReg[Rm], Target);
|
|
return;
|
|
|
|
case ASR_3REG:
|
|
// ARS <Rd>, <Rn>, <Rm>
|
|
if ((OpCode32 & BIT20) == BIT20) {
|
|
Buf[Offset - 3] = 'S'; // assume %-6a
|
|
}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a %a", gReg[Rd], gReg[Rn], gReg[Rm]);
|
|
return;
|
|
|
|
case ADR_THUMB2:
|
|
// ADDR <Rd>, <label>
|
|
Target = (OpCode32 & 0xff) | ((OpCode32 >> 8) & 0x700) | ((OpCode & BIT26) == BIT26 ? BIT11 : 0);
|
|
if ((OpCode & (BIT23 | BIT21)) == (BIT23 | BIT21)) {
|
|
Target = PCAlign4 (PC) - Target;
|
|
} else {
|
|
Target = PCAlign4 (PC) + Target;
|
|
}
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, 0x%08x", gReg[Rd], Target);
|
|
return;
|
|
|
|
case CMN_THUMB2:
|
|
// CMN <Rn>, #<const>}
|
|
Target = (OpCode32 & 0xff) | ((OpCode >> 4) & 0x700) | ((OpCode & BIT26) == BIT26 ? BIT11 : 0);
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, #0x%x", gReg[Rn], Target);
|
|
return;
|
|
|
|
case BFC_THUMB2:
|
|
// BFI <Rd>, <Rn>, #<lsb>, #<width>
|
|
msbit = OpCode32 & 0x1f;
|
|
lsbit = ((OpCode32 >> 6) & 3) | ((OpCode >> 10) & 0x1c);
|
|
if ((Rn == 0xf) & (AsciiStrCmp (gOpThumb2[Index].Start, "BFC") == 0)){
|
|
// BFC <Rd>, #<lsb>, #<width>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, #%d, #%d", gReg[Rd], lsbit, msbit - lsbit + 1);
|
|
} else if (AsciiStrCmp (gOpThumb2[Index].Start, "BFI") == 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, #%d, #%d", gReg[Rd], gReg[Rn], lsbit, msbit - lsbit + 1);
|
|
} else {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, #%d, #%d", gReg[Rd], gReg[Rn], lsbit, msbit + 1);
|
|
}
|
|
return;
|
|
|
|
case CPD_THUMB2:
|
|
// <coproc>,<opc1>,<CRd>,<CRn>,<CRm>,<opc2>
|
|
coproc = (OpCode32 >> 8) & 0xf;
|
|
opc1 = (OpCode32 >> 20) & 0xf;
|
|
opc2 = (OpCode32 >> 5) & 0x7;
|
|
CRd = (OpCode32 >> 12) & 0xf;
|
|
CRn = (OpCode32 >> 16) & 0xf;
|
|
CRm = OpCode32 & 0xf;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " p%d,#%d,c%d,c%d,c%d", coproc, opc1, CRd, CRn, CRm);
|
|
if (opc2 != 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ",#%d,", opc2);
|
|
}
|
|
return;
|
|
|
|
case MRC_THUMB2:
|
|
// MRC <coproc>,<opc1>,<Rt>,<CRn>,<CRm>,<opc2>
|
|
coproc = (OpCode32 >> 8) & 0xf;
|
|
opc1 = (OpCode32 >> 20) & 0xf;
|
|
opc2 = (OpCode32 >> 5) & 0x7;
|
|
CRn = (OpCode32 >> 16) & 0xf;
|
|
CRm = OpCode32 & 0xf;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " p%d,#%d,%a,c%d,c%d", coproc, opc1, gReg[Rt], CRn, CRm);
|
|
if (opc2 != 0) {
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, ",#%d,", opc2);
|
|
}
|
|
return;
|
|
|
|
case MRRC_THUMB2:
|
|
// MRC <coproc>,<opc1>,<Rt>,<Rt2>,<CRm>,<opc2>
|
|
coproc = (OpCode32 >> 8) & 0xf;
|
|
opc1 = (OpCode32 >> 20) & 0xf;
|
|
CRn = (OpCode32 >> 16) & 0xf;
|
|
CRm = OpCode32 & 0xf;
|
|
Offset += AsciiSPrint (&Buf[Offset], Size - Offset, " p%d,#%d,%a,%a,c%d", coproc, opc1, gReg[Rt], gReg[Rt2], CRm);
|
|
return;
|
|
|
|
case THUMB2_2REGS:
|
|
// <Rd>, <Rm>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a", gReg[Rd], gReg[Rm]);
|
|
return;
|
|
|
|
case THUMB2_4REGS:
|
|
// <Rd>, <Rn>, <Rm>, <Ra>
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, %a, %a, %a", gReg[Rd], gReg[Rn], gReg[Rm], gReg[Rt]);
|
|
return;
|
|
|
|
case THUMB2_MRS:
|
|
// MRS <Rd>, CPSR
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " %a, CPSR", gReg[Rd]);
|
|
return;
|
|
|
|
case THUMB2_MSR:
|
|
// MRS CPSR_<fields>, <Rd>
|
|
Target = (OpCode32 >> 10) & 3;
|
|
AsciiSPrint (&Buf[Offset], Size - Offset, " CPSR_%a%a, %a", (Target & 2) == 0 ? "":"f", (Target & 1) == 0 ? "":"s", gReg[Rd]);
|
|
return;
|
|
|
|
case THUMB2_NO_ARGS:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
AsciiSPrint (Buf, Size, "0x%08x", OpCode32);
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
DisassembleArmInstruction (
|
|
IN UINT32 **OpCodePtr,
|
|
OUT CHAR8 *Buf,
|
|
OUT UINTN Size,
|
|
IN BOOLEAN Extended
|
|
);
|
|
|
|
|
|
/**
|
|
Place a disassembly of **OpCodePtr into buffer, and update OpCodePtr to
|
|
point to next instruction.
|
|
|
|
We cheat and only decode instructions that access
|
|
memory. If the instruction is not found we dump the instruction in hex.
|
|
|
|
@param OpCodePtrPtr Pointer to pointer of ARM Thumb instruction to disassemble.
|
|
@param Thumb TRUE for Thumb(2), FALSE for ARM instruction stream
|
|
@param Extended TRUE dump hex for instruction too.
|
|
@param ItBlock Size of IT Block
|
|
@param Buf Buffer to sprintf disassembly into.
|
|
@param Size Size of Buf in bytes.
|
|
|
|
**/
|
|
VOID
|
|
DisassembleInstruction (
|
|
IN UINT8 **OpCodePtr,
|
|
IN BOOLEAN Thumb,
|
|
IN BOOLEAN Extended,
|
|
IN OUT UINT32 *ItBlock,
|
|
OUT CHAR8 *Buf,
|
|
OUT UINTN Size
|
|
)
|
|
{
|
|
if (Thumb) {
|
|
DisassembleThumbInstruction ((UINT16 **)OpCodePtr, Buf, Size, ItBlock, Extended);
|
|
} else {
|
|
DisassembleArmInstruction ((UINT32 **)OpCodePtr, Buf, Size, Extended);
|
|
}
|
|
}
|
|
|