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| 1 /* | |
| 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 | |
| 4 * found in the LICENSE file. | |
| 5 */ | |
| 6 | |
| 7 /* | |
| 8 * x86_insts.h - Holds common utilties for decoding x86 instructions. | |
| 9 */ | |
| 10 | |
| 11 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_X86_INSTS_H__ | |
| 12 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_X86_INSTS_H__ | |
| 13 | |
| 14 #include "native_client/src/include/portability.h" | |
| 15 | |
| 16 /* Readability macros for bitset testing. */ | |
| 17 /* Set contains bit. */ | |
| 18 #define NaClHasBit(set, bit) ((set) & (bit)) | |
| 19 | |
| 20 /* Set contains (all) bits. */ | |
| 21 #define NaClHasBits(set, bits) ((bits) == ((set) & (bits))) | |
| 22 | |
| 23 /* Set contains bits other than given bit. */ | |
| 24 #define NaClExcludesBit(set, bit) (~(set) & bit) | |
| 25 | |
| 26 /* Readability macros for changing bitsets. */ | |
| 27 #define NaClAddBits(set, bits) (set |= (bits)) | |
| 28 #define NaClRemoveBits(set, bits) (set &= ~(bits)) | |
| 29 | |
| 30 EXTERN_C_BEGIN | |
| 31 | |
| 32 /* Defines the corresponding byte encodings for each of the prefixes. */ | |
| 33 #define kValueSEGCS 0x2e | |
| 34 #define kValueSEGSS 0x36 | |
| 35 #define kValueSEGFS 0x64 | |
| 36 #define kValueSEGGS 0x65 | |
| 37 #define kValueDATA16 0x66 | |
| 38 #define kValueADDR16 0x67 | |
| 39 #define kValueREPNE 0xf2 | |
| 40 #define kValueREP 0xf3 | |
| 41 #define kValueLOCK 0xf0 | |
| 42 #define kValueSEGES 0x26 | |
| 43 #define kValueSEGDS 0x3e | |
| 44 | |
| 45 /* Using a bit mask here. Hopefully nobody will be offended. | |
| 46 * Prefix usage: 0x2e and 0x3e are used as branch prediction hints | |
| 47 * 0x64 and 0x65 needed for TLS | |
| 48 * 0x26 and 0x36 shouldn't be needed | |
| 49 * These are #defines, not const ints, because they are used | |
| 50 * for array initialization | |
| 51 */ | |
| 52 #define kPrefixSEGCS 0x0001 /* 0x2e */ | |
| 53 #define kPrefixSEGSS 0x0002 /* 0x36 */ | |
| 54 #define kPrefixSEGFS 0x0004 /* 0x64 */ | |
| 55 #define kPrefixSEGGS 0x0008 /* 0x65 */ | |
| 56 #define kPrefixDATA16 0x0010 /* 0x66 - OKAY */ | |
| 57 #define kPrefixADDR16 0x0020 /* 0x67 - disallowed */ | |
| 58 #define kPrefixREPNE 0x0040 /* 0xf2 - OKAY */ | |
| 59 #define kPrefixREP 0x0080 /* 0xf3 - OKAY */ | |
| 60 #define kPrefixLOCK 0x0100 /* 0xf0 - OKAY */ | |
| 61 #define kPrefixSEGES 0x0200 /* 0x26 - disallowed */ | |
| 62 #define kPrefixSEGDS 0x0400 /* 0x3e - disallowed */ | |
| 63 #define kPrefixREX 0x1000 /* 0x40 - 0x4f Rex prefix */ | |
| 64 | |
| 65 /* a new enumerated type for instructions. | |
| 66 * Note: Each enumerate type is marked with one of the following symbols, | |
| 67 * defining the validator it us used for: | |
| 68 * 32 - The x86-32 validator. | |
| 69 * 64 - The x86-64 validator. | |
| 70 * Both - Both the x86-32 and the x86-64 validators. | |
| 71 * Note: The code for the x86-64 validator is being cleaned up, and there | |
| 72 * are still uses of the "32" tag for x86 instructions. | |
| 73 * TODO(karl) - Fix this comment when modeling for the x86-64 has been cleaned | |
| 74 * up. | |
| 75 */ | |
| 76 typedef enum { | |
| 77 NACLi_UNDEFINED = 0, /* uninitialized space; should never happen */ /* Both */ | |
| 78 NACLi_ILLEGAL, /* not allowed in NaCl */ /* Both */ | |
| 79 NACLi_INVALID, /* not valid on any known x86 */ /* Both */ | |
| 80 NACLi_SYSTEM, /* ring-0 instruction, not allowed in NaCl */ /* Both */ | |
| 81 NACLi_NOP, /* Predefined nop instruction sequence. */ /* 32 */ | |
| 82 NACLi_386, /* an allowed instruction on all i386 implementations */ | |
| 83 /* Both */ | |
| 84 /* subset of i386 that allows LOCK prefix. NOTE: | |
| 85 * This is only used for the 32 bit validator. The new | |
| 86 * 64 bit validator uses "InstFlag(OpcodeLockable)" | |
| 87 * to communicate this (which separates the CPU ID | |
| 88 * information from whether the instruction is lockable. | |
| 89 * Hopefully, in future releases, this enumerated type | |
| 90 * will be removed. | |
| 91 */ | |
| 92 NACLi_386L, /* 32 */ | |
| 93 NACLi_386R, /* subset of i386 that allow REP prefix */ /* 32 */ | |
| 94 NACLi_386RE, /* subset of i386 that allow REPE/REPZ prefixes */ | |
| 95 /* 32 */ | |
| 96 NACLi_JMP8, /* 32 */ | |
| 97 NACLi_JMPZ, /* 32 */ | |
| 98 NACLi_INDIRECT, /* 32 */ | |
| 99 NACLi_OPINMRM, /* 32 */ | |
| 100 NACLi_RETURN, /* 32 */ | |
| 101 /* Both */ | |
| 102 NACLi_LAHF, /* LAHF/SAHF: unconditionally allowed in 32-bit | |
| 103 conditionally allowed in 64-bit mode */ | |
| 104 NACLi_SFENCE_CLFLUSH, /* Both */ | |
| 105 NACLi_CMPXCHG8B, /* Both */ | |
| 106 NACLi_CMPXCHG16B, /* 64-bit mode only, illegal for NaCl */ /* Both */ | |
| 107 NACLi_CMOV, /* Both */ | |
| 108 NACLi_RDMSR, /* Both */ | |
| 109 NACLi_RDTSC, /* Both */ | |
| 110 NACLi_RDTSCP, /* AMD only */ /* Both */ | |
| 111 NACLi_SYSCALL, /* AMD only; equivalent to SYSENTER */ /* Both */ | |
| 112 NACLi_SYSENTER, /* Both */ | |
| 113 NACLi_X87, /* Both */ | |
| 114 NACLi_X87_FSINCOS, /* Both */ | |
| 115 NACLi_MMX, /* Both */ | |
| 116 NACLi_MMXSSE2, /* MMX with no prefix, SSE2 with 0x66 prefix */ /* Both */ | |
| 117 NACLi_3DNOW, /* AMD only */ /* Both */ | |
| 118 NACLi_EMMX, /* Cyrix only; not supported yet */ /* Both */ | |
| 119 NACLi_E3DNOW, /* AMD only */ /* Both */ | |
| 120 NACLi_SSE, /* Both */ | |
| 121 NACLi_SSE2, /* no prefix => MMX; prefix 66 => SSE; */ /* Both */ | |
| 122 /* f2, f3 not allowed unless used for opcode selection */ | |
| 123 NACLi_SSE2x, /* SSE2; prefix 66 required!!! */ /* 32 */ | |
| 124 NACLi_SSE3, /* Both */ | |
| 125 NACLi_SSE4A, /* AMD only */ /* Both */ | |
| 126 NACLi_SSE41, /* Both */ | |
| 127 NACLi_SSE42, /* Both */ | |
| 128 NACLi_MOVBE, /* Both */ | |
| 129 NACLi_POPCNT, /* Both */ | |
| 130 NACLi_LZCNT, /* Both */ | |
| 131 NACLi_LONGMODE,/* AMD only? */ /* 32 */ | |
| 132 NACLi_SVM, /* AMD only */ /* Both */ | |
| 133 NACLi_SSSE3, /* Both */ | |
| 134 NACLi_3BYTE, /* 32 */ | |
| 135 NACLi_FCMOV, /* 32 */ | |
| 136 NACLi_VMX, /* 64 */ | |
| 137 NACLi_FXSAVE /* SAVE/RESTORE xmm, mmx, and x87 state. */ /* 64 */ | |
| 138 /* NOTE: This enum must be kept consistent with kNaClInstTypeRange */ | |
| 139 /* (defined below). */ | |
| 140 /* Note: If you change this enumerated type, be sure to update */ | |
| 141 /* kNaClInstTypeString in x86_insts.c. */ | |
| 142 } NaClInstType; | |
| 143 | |
| 144 #define kNaClInstTypeRange 49 | |
| 145 | |
| 146 /* Returns the print name for the enumerated type.*/ | |
| 147 const char* NaClInstTypeString(NaClInstType typ); | |
| 148 | |
| 149 /* Define the maximum register value that can be encoded into the opcode | |
| 150 * byte. | |
| 151 */ | |
| 152 #define kMaxRegisterIndexInOpcode 7 | |
| 153 | |
| 154 extern const uint8_t kFirstX87Opcode; /* 0xd8 */ | |
| 155 extern const uint8_t kLastX87Opcode; /* 0xdf */ | |
| 156 | |
| 157 /* Defines the opcode for the WAIT instruction. | |
| 158 * Note: WAIT is an x87 instruction but not in the coproc opcode space. | |
| 159 */ | |
| 160 extern const uint8_t kWAITOp; /* 0x9b */ | |
| 161 | |
| 162 #define NCDTABLESIZE 256 | |
| 163 | |
| 164 extern const uint8_t kTwoByteOpcodeByte1; /* 0x0f */ | |
| 165 extern const uint8_t k3DNowOpcodeByte2; /* 0x0f */ | |
| 166 extern const int kMaxPrefixBytes; /* 4 */ | |
| 167 | |
| 168 /* Accessors for the ModRm byte. */ | |
| 169 extern uint8_t modrm_mod(uint8_t modrm); | |
| 170 extern uint8_t modrm_rm(uint8_t modrm); | |
| 171 extern uint8_t modrm_reg(uint8_t modrm); | |
| 172 extern uint8_t modrm_opcode(uint8_t modrm); | |
| 173 | |
| 174 /* Accessors for the Sib byte. */ | |
| 175 extern uint8_t sib_ss(uint8_t sib); | |
| 176 extern uint8_t sib_index(uint8_t sib); | |
| 177 extern uint8_t sib_base(uint8_t sib); | |
| 178 | |
| 179 /* Defines the range of rex prefix values. */ | |
| 180 extern const uint8_t NaClRexMin; /* 0x40 */ | |
| 181 extern const uint8_t NaClRexMax; /* 0x4F */ | |
| 182 | |
| 183 /* Accessors for each of the rex bits. */ | |
| 184 uint8_t NaClRexW(uint8_t prefix); | |
| 185 uint8_t NaClRexR(uint8_t prefix); | |
| 186 uint8_t NaClRexX(uint8_t prefix); | |
| 187 uint8_t NaClRexB(uint8_t prefix); | |
| 188 | |
| 189 EXTERN_C_END | |
| 190 | |
| 191 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_X86_INSTS_H__ */ | |
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Chromium Code Reviews
Issue 625923004:
Delete old x86 validator. (Closed)
Base URL: svn://svn.chromium.org/native_client/trunk/src/native_client