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| 1 /* | 1 /* |
| 2 * Copyright (c) 2012 The Native Client Authors. All rights reserved. | 2 * Copyright (c) 2012 The Native Client Authors. All rights reserved. |
| 3 * Use of this source code is governed by a BSD-style license that can be | 3 * Use of this source code is governed by a BSD-style license that can be |
| 4 * found in the LICENSE file. | 4 * found in the LICENSE file. |
| 5 */ | 5 */ |
| 6 | 6 |
| 7 /* | 7 /* |
| 8 * This file contains common parts of x86-32 and x86-64 internals (inline | 8 * This file contains common parts of x86-32 and x86-64 internals (inline |
| 9 * functions and defines). | 9 * functions and defines). |
| 10 */ | 10 */ |
| 11 | 11 |
| 12 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ | 12 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ |
| 13 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ | 13 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ |
| 14 | 14 |
| 15 #include "native_client/src/trusted/validator_ragel/unreviewed/decoder.h" | 15 #define GET_REX_PREFIX() instruction.prefix.rex |
| 16 #define SET_REX_PREFIX(P) instruction.prefix.rex = (P) |
| 17 #define GET_VEX_PREFIX2() vex_prefix2 |
| 18 #define SET_VEX_PREFIX2(P) vex_prefix2 = (P) |
| 19 #define GET_VEX_PREFIX3() vex_prefix3 |
| 20 #define SET_VEX_PREFIX3(P) vex_prefix3 = (P) |
| 21 #define SET_DATA16_PREFIX(S) instruction.prefix.data16 = (S) |
| 22 #define SET_LOCK_PREFIX(S) instruction.prefix.lock = (S) |
| 23 #define SET_REPZ_PREFIX(S) instruction.prefix.repz = (S) |
| 24 #define SET_REPNZ_PREFIX(S) instruction.prefix.repnz = (S) |
| 25 #define SET_BRANCH_TAKEN(S) instruction.prefix.branch_taken = (S) |
| 26 #define SET_BRANCH_NOT_TAKEN(S) instruction.prefix.branch_not_taken = (S) |
| 27 #define SET_INSTRUCTION_NAME(N) instruction.name = (N) |
| 28 #define GET_OPERAND_NAME(N) instruction.operands[(N)].name |
| 29 #define SET_OPERAND_NAME(N, S) instruction.operands[(N)].name = (S) |
| 30 #define SET_OPERAND_TYPE(N, S) instruction.operands[(N)].type = (S) |
| 31 #define SET_OPERANDS_COUNT(N) instruction.operands_count = (N) |
| 32 #define SET_MODRM_BASE(N) instruction.rm.base = (N) |
| 33 #define SET_MODRM_INDEX(N) instruction.rm.index = (N) |
| 34 #define SET_MODRM_SCALE(S) instruction.rm.scale = (S) |
| 35 #define SET_DISP_TYPE(T) instruction.rm.disp_type = (T) |
| 36 #define SET_DISP_PTR(P) \ |
| 37 switch (instruction.rm.disp_type) { \ |
| 38 case DISPNONE: \ |
| 39 instruction.rm.offset = 0; \ |
| 40 break; \ |
| 41 case DISP8: \ |
| 42 instruction.rm.offset = AnyFieldValue8bitSigned(P); \ |
| 43 case DISP16: \ |
| 44 instruction.rm.offset = AnyFieldValue16bitSigned(P); \ |
| 45 break; \ |
| 46 case DISP32: \ |
| 47 instruction.rm.offset = AnyFieldValue32bitSigned(P); \ |
| 48 break; \ |
| 49 case DISP64: \ |
| 50 instruction.rm.offset = AnyFieldValue64bitSigned(P); \ |
| 51 break; \ |
| 52 } |
| 53 #define SET_IMM_TYPE(T) imm_operand = (T) |
| 54 #define SET_IMM_PTR(P) SET_IMM_PTR(P, 0, imm2_operand) |
| 55 #define SET_IMM2_TYPE(T) imm2_operand = (T) |
| 56 #define SET_IMM2_PTR(P) SET_IMM_PTR(P, 1, imm2_operand) |
| 57 #define SET_IMM_PTR(P, N, O) \ |
| 58 switch (O) { \ |
| 59 case IMMNONE: \ |
| 60 instruction.imm[N] = 0; \ |
| 61 break; \ |
| 62 case IMM2: \ |
| 63 instruction.imm[N] = P[0] & 0x03; \ |
| 64 break; \ |
| 65 case IMM8: \ |
| 66 instruction.imm[N] = AnyFieldValue8bitUnsigned(P); \ |
| 67 break; \ |
| 68 case IMM16: \ |
| 69 instruction.imm[N] = AnyFieldValue16bitUnsigned(P); \ |
| 70 break; \ |
| 71 case IMM32: \ |
| 72 instruction.imm[N] = AnyFieldValue32bitUnsigned(P); \ |
| 73 break; \ |
| 74 case IMM64: \ |
| 75 instruction.imm[N] = AnyFieldValue64bitUnsigned(P); \ |
| 76 break; \ |
| 77 } |
| 78 #define SET_CPU_FEATURE(F) |
| 16 | 79 |
| 17 #if NACL_WINDOWS | 80 enum { |
| 18 # define FORCEINLINE __forceinline | 81 REX_B = 1, |
| 19 #else | 82 REX_X = 2, |
| 20 # define FORCEINLINE __inline __attribute__ ((always_inline)) | 83 REX_R = 4, |
| 21 #endif | 84 REX_W = 8 |
| 85 }; |
| 22 | 86 |
| 23 static FORCEINLINE uint8_t RegFromOpcode(uint8_t modrm) { | 87 enum imm_mode { |
| 24 return modrm & 0x07; | 88 IMMNONE, |
| 25 } | 89 IMM2, |
| 26 | 90 IMM8, |
| 27 static FORCEINLINE uint8_t ModFromModRM(uint8_t modrm) { | 91 IMM16, |
| 28 return modrm >> 6; | 92 IMM32, |
| 29 } | 93 IMM64 |
| 30 | |
| 31 static FORCEINLINE uint8_t RegFromModRM(uint8_t modrm) { | |
| 32 return (modrm & 0x38) >> 3; | |
| 33 } | |
| 34 | |
| 35 static FORCEINLINE uint8_t RMFromModRM(uint8_t modrm) { | |
| 36 return modrm & 0x07; | |
| 37 } | |
| 38 | |
| 39 static FORCEINLINE uint8_t ScaleFromSIB(uint8_t sib) { | |
| 40 return sib >> 6; | |
| 41 } | |
| 42 | |
| 43 static FORCEINLINE uint8_t IndexFromSIB(uint8_t sib) { | |
| 44 return (sib & 0x38) >> 3; | |
| 45 } | |
| 46 | |
| 47 static FORCEINLINE uint8_t BaseFromSIB(uint8_t sib) { | |
| 48 return sib & 0x07; | |
| 49 } | |
| 50 | |
| 51 static FORCEINLINE uint8_t BaseExtentionFromREX(uint8_t rex) { | |
| 52 return (rex & 0x01) << 3; | |
| 53 } | |
| 54 | |
| 55 static FORCEINLINE uint8_t BaseExtentionFromVEX(uint8_t vex2) { | |
| 56 return ((~vex2) & 0x20) >> 2; | |
| 57 } | |
| 58 | |
| 59 static FORCEINLINE uint8_t IndexExtentionFromREX(uint8_t rex) { | |
| 60 return (rex & 0x02) << 2; | |
| 61 } | |
| 62 | |
| 63 static FORCEINLINE uint8_t IndexExtentionFromVEX(uint8_t vex2) { | |
| 64 return ((~vex2) & 0x40) >> 3; | |
| 65 } | |
| 66 | |
| 67 static FORCEINLINE uint8_t RegisterExtentionFromREX(uint8_t rex) { | |
| 68 return (rex & 0x04) << 1; | |
| 69 } | |
| 70 | |
| 71 static FORCEINLINE uint8_t RegisterExtentionFromVEX(uint8_t vex2) { | |
| 72 return ((~vex2) & 0x80) >> 4; | |
| 73 } | |
| 74 | |
| 75 static FORCEINLINE uint8_t GetOperandFromVexIA32(uint8_t vex3) { | |
| 76 return ((~vex3) & 0x38) >> 3; | |
| 77 } | |
| 78 | |
| 79 static FORCEINLINE uint8_t GetOperandFromVexAMD64(uint8_t vex3) { | |
| 80 return ((~vex3) & 0x78) >> 3; | |
| 81 } | |
| 82 | |
| 83 static FORCEINLINE uint8_t RegisterFromIS4(uint8_t is4) { | |
| 84 return is4 >> 4; | |
| 85 } | |
| 86 | |
| 87 static const uint8_t index_registers[] = { | |
| 88 /* Note how REG_RIZ falls out of the pattern. */ | |
| 89 REG_RAX, REG_RCX, REG_RDX, REG_RBX, | |
| 90 REG_RIZ, REG_RBP, REG_RSI, REG_RDI, | |
| 91 REG_R8, REG_R9, REG_R10, REG_R11, | |
| 92 REG_R12, REG_R13, REG_R14, REG_R15 | |
| 93 }; | 94 }; |
| 94 | 95 |
| 95 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ */ | 96 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_RAGEL_DECODER_INTERNAL_H_ */ |
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