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zydis/tools/ZydisInfo.c

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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Florian Bernd
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
/**
* @file
* @brief TODO
*/
#include <stdio.h>
#include <inttypes.h>
#include <string.h>
#include <Zydis/Zydis.h>
/* ============================================================================================== */
/* Helper functions */
/* ============================================================================================== */
const char* ZydisFormatStatus(ZydisStatus status)
{
static const char* strings[] =
{
"SUCCESS",
"INVALID_PARAMETER",
"INVALID_OPERATION",
"INSUFFICIENT_BUFFER_SIZE",
"NO_MORE_DATA",
"DECODING_ERROR",
"INSTRUCTION_TOO_LONG",
"BAD_REGISTER",
"ILLEGAL_LOCK",
"ILLEGAL_LEGACY_PFX",
"ILLEGAL_REX",
"INVALID_MAP",
"MALFORMED_EVEX",
"MALFORMED_MVEX",
"INVALID_MASK",
"IMPOSSIBLE_INSTRUCTION",
"INSUFFICIENT_BUFFER_SIZE"
};
ZYDIS_ASSERT(status < ZYDIS_ARRAY_SIZE(strings));
return strings[status];
}
/* ============================================================================================== */
/* Print functions */
/* ============================================================================================== */
void printOperands(ZydisDecodedInstruction* instruction)
{
fputs("== [ OPERANDS ] =====================================================", stdout);
fputs("=======================================\n", stdout);
fputs("## TYPE VISIBILITY ACTION ENCODING SIZE NELEM ELEMSZ", stdout);
fputs(" ELEMTYPE VALUE\n", stdout);
fputs("-- --------- ---------- ------ ------------ ---- ----- ------", stdout);
fputs(" -------- ---------------------------\n", stdout);
uint8_t immId = 0;
for (uint8_t i = 0; i < instruction->operandCount; ++i)
{
static const char* operandTypes[] =
{
"UNUSED",
"REGISTER",
"MEMORY",
"POINTER",
"IMMEDIATE"
};
static const char* operandVisibilities[] =
{
"INVALID",
"EXPLICIT",
"IMPLICIT",
"HIDDEN"
};
static const char* operandActions[] =
{
"INV",
"R",
"W",
"RW",
"CR",
"CW",
"RCW",
"CRW"
};
static const char* elementTypes[] =
{
"INVALID",
"STRUCT",
"UINT",
"INT",
"FLOAT16",
"FLOAT32",
"FLOAT64",
"FLOAT80",
"LONGBCD"
};
static const char* operandEncodings[] =
{
"NONE",
"MODRM_REG",
"MODRM_RM",
"OPCODE",
"NDSNDD",
"IS4",
"MASK",
"DISP8",
"DISP16",
"DISP32",
"DISP64",
"DISP16_32_64",
"DISP32_32_64",
"DISP16_32_32",
"UIMM8",
"UIMM16",
"UIMM32",
"UIMM64",
"UIMM16_32_64",
"UIMM32_32_64",
"UIMM16_32_32",
"SIMM8",
"SIMM16",
"SIMM32",
"SIMM64",
"SIMM16_32_64",
"SIMM32_32_64",
"SIMM16_32_32",
"JIMM8",
"JIMM16",
"JIMM32",
"JIMM64",
"JIMM16_32_64",
"JIMM32_32_64",
"JIMM16_32_32"
};
printf("%2d %9s %10s %6s %12s %5d %4d %6d %8s",
i,
operandTypes[instruction->operands[i].type],
operandVisibilities[instruction->operands[i].visibility],
operandActions[instruction->operands[i].action],
operandEncodings[instruction->operands[i].encoding],
instruction->operands[i].size,
instruction->operands[i].elementCount,
instruction->operands[i].elementSize,
elementTypes[instruction->operands[i].elementType]);
switch (instruction->operands[i].type)
{
case ZYDIS_OPERAND_TYPE_REGISTER:
printf(" %27s", ZydisRegisterGetString(instruction->operands[i].reg));
break;
case ZYDIS_OPERAND_TYPE_MEMORY:
printf(" SEG =%20s\n", ZydisRegisterGetString(instruction->operands[i].mem.segment));
printf(" %84s =%20s\n",
"BASE ", ZydisRegisterGetString(instruction->operands[i].mem.base));
printf(" %84s =%20s\n",
"INDEX", ZydisRegisterGetString(instruction->operands[i].mem.index));
printf(" %84s =%20d\n", "SCALE", instruction->operands[i].mem.scale);
printf(" %84s = 0x%016"PRIX64,
"DISP ", instruction->operands[i].mem.disp.value);
break;
case ZYDIS_OPERAND_TYPE_POINTER:
break;
case ZYDIS_OPERAND_TYPE_IMMEDIATE:
if (instruction->operands[i].imm.isSigned)
{
printf(" (%s %s %2d) 0x%016"PRIX64,
instruction->operands[i].imm.isSigned ? "S" : "U",
instruction->operands[i].imm.isRelative ? "R" : "_",
instruction->raw.imm[immId].size,
instruction->operands[i].imm.value.s);
} else
{
printf(" SIGN =%20s\n", instruction->operands[i].imm.isSigned ? "Y" : "N");
printf(" %84s =%20s\n",
"REL ", instruction->operands[i].imm.isRelative ? "Y" : "N");
printf(" %84s = %2d\n",
"SIZE ", instruction->raw.imm[immId].size);
printf(" %84s = 0x%016"PRIX64,
"VALUE", instruction->operands[i].imm.value.u);
}
++immId;
break;
default:
ZYDIS_UNREACHABLE;
}
puts("");
}
fputs("-- --------- ---------- ------ ------------ ---- ----- ------", stdout);
fputs(" -------- ---------------------------\n", stdout);
}
void printFlags(ZydisDecodedInstruction* instruction)
{
static const char* flagNames[] =
{
"CF",
"PF",
"AF",
"ZF",
"SF",
"TF",
"IF",
"DF",
"OF",
"IOPL",
"NT",
"RF",
"VM",
"AC",
"VIF",
"VIP",
"ID",
"C0",
"C1",
"C2",
"C3"
};
static const char* flagActions[] =
{
" ",
"T",
"M",
"0",
"1",
"U"
};
fputs("== [ FLAGS ] =====================================================", stdout);
fputs("=======================================\n", stdout);
printf(" ACTIONS: ");
uint8_t c = 0;
for (ZydisCPUFlag i = 0; i < ZYDIS_ARRAY_SIZE(instruction->flags); ++i)
{
if (c == 8)
{
printf("\n ");
}
if (instruction->flags[i].action != ZYDIS_CPUFLAG_ACTION_NONE)
{
++c;
printf("[%-4s: %s] ", flagNames[i], flagActions[instruction->flags[i].action]);
}
}
puts(c ? "" : "none");
ZydisCPUFlagMask flags, temp;
ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_TESTED, &flags);
printf(" READ: 0x%08"PRIX32"\n", flags);
ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_MODIFIED, &flags);
ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_SET_0, &temp);
flags |= temp;
ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_SET_1, &temp);
flags |= temp;
printf(" WRITTEN: 0x%08"PRIX32"\n", flags);
ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_UNDEFINED, &flags);
printf(" UNDEFINED: 0x%08"PRIX32"\n", flags);
}
void printAVXInfo(ZydisDecodedInstruction* instruction)
{
static const char* broadcastStrings[] =
{
"NONE",
"1_TO_2",
"1_TO_4",
"1_TO_8",
"1_TO_16",
"1_TO_32",
"1_TO_64",
"2_TO_4",
"2_TO_8",
"2_TO_16",
"4_TO_8",
"4_TO_16",
"8_TO_16"
};
static const char* maskModeStrings[] =
{
"NONE",
"MERGE",
"ZERO"
};
static const char* roundingModeStrings[] =
{
"DEFAULT",
"RN",
"RD",
"RU",
"RZ"
};
static const char* swizzleModeStrings[] =
{
"NONE",
"DCBA",
"CDAB",
"BADC",
"DACB",
"AAAA",
"BBBB",
"CCCC",
"DDDD"
};
static const char* conversionModeStrings[] =
{
"NONE",
"FLOAT16",
"SINT8",
"UINT8",
"SINT16",
"UINT16"
};
fputs("== [ AVX ] =====================================================", stdout);
fputs("=======================================\n", stdout);
printf(" VECTORLEN: %03d\n", instruction->avx.vectorLength);
printf(" BROADCAST: %s%s", broadcastStrings[instruction->avx.broadcast.mode],
instruction->avx.broadcast.isStatic ? " (static)" : "");
switch (instruction->encoding)
{
case ZYDIS_INSTRUCTION_ENCODING_EVEX:
printf("\n ROUNDING: %s", roundingModeStrings[instruction->avx.roundingMode]);
printf("\n SAE: %s", instruction->avx.hasSAE ? "Y" : "N");
printf("\n MASK: %s [%5s]%s", ZydisRegisterGetString(instruction->avx.mask.reg),
maskModeStrings[instruction->avx.mask.mode],
instruction->avx.mask.isControlMask ? " (control-mask)" : "");
break;
case ZYDIS_INSTRUCTION_ENCODING_MVEX:
printf("\n ROUNDING: %s", roundingModeStrings[instruction->avx.roundingMode]);
printf("\n SAE: %s", instruction->avx.hasSAE ? "Y" : "N");
printf("\n MASK: %s [MERGE]", ZydisRegisterGetString(instruction->avx.mask.reg));
printf("\n EH: %s", instruction->avx.hasEvictionHint ? "Y" : "N");
printf("\n SWIZZLE: %s", swizzleModeStrings[instruction->avx.swizzleMode]);
printf("\n CONVERT: %s", conversionModeStrings[instruction->avx.conversionMode]);
break;
default:
break;
}
puts("");
}
void printInstruction(ZydisDecodedInstruction* instruction)
{
static const char* opcodeMapStrings[] =
{
"DEFAULT",
"0F",
"0F38",
"0F3A",
"0F0F",
"XOP8",
"XOP9",
"XOPA"
};
static const char* instructionEncodingStrings[] =
{
"",
"DEFAULT",
"3DNOW",
"XOP",
"VEX",
"EVEX",
"MVEX"
};
fputs("== [ BASIC ] =====================================================", stdout);
fputs("=======================================\n", stdout);
printf(" MNEMONIC: %s [ENC: %s, MAP: %s, OPC: %02X]\n",
ZydisMnemonicGetString(instruction->mnemonic),
instructionEncodingStrings[instruction->encoding],
opcodeMapStrings[instruction->opcodeMap],
instruction->opcode);
printf(" LENGTH: %2d\n", instruction->length);
printf(" SSZ: %2d\n", instruction->stackWidth);
printf(" EOSZ: %2d\n", instruction->operandSize);
printf(" EASZ: %2d\n", instruction->addressWidth);
if (instruction->operandCount > 0)
{
puts("");
printOperands(instruction);
}
if (ZydisRegisterGetClass(
instruction->operands[instruction->operandCount - 1].reg) == ZYDIS_REGCLASS_FLAGS)
{
puts("");
printFlags(instruction);
}
if ((instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_XOP) ||
(instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_VEX) ||
(instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX) ||
(instruction->encoding == ZYDIS_INSTRUCTION_ENCODING_MVEX))
{
puts("");
printAVXInfo(instruction);
}
ZydisFormatter formatter;
ZydisFormatterInitEx(&formatter, ZYDIS_FORMATTER_STYLE_INTEL,
ZYDIS_FMTFLAG_FORCE_SEGMENTS | ZYDIS_FMTFLAG_FORCE_OPERANDSIZE,
ZYDIS_FORMATTER_ADDR_ABSOLUTE, ZYDIS_FORMATTER_DISP_DEFAULT, ZYDIS_FORMATTER_IMM_DEFAULT);
char buffer[256];
ZydisFormatterFormatInstruction(&formatter, instruction, &buffer[0], sizeof(buffer));
fputs("\n== [ DISASM ] =====================================================", stdout);
fputs("=======================================\n", stdout);
printf(" %s\n", &buffer[0]);
}
/* ============================================================================================== */
/* Entry point */
/* ============================================================================================== */
int main(int argc, char** argv)
{
if (argc < 3)
{
fputs("Usage: ZydisInfo -[16|32|64] [hexbytes]\n", stderr);
return ZYDIS_STATUS_INVALID_PARAMETER;
}
ZydisDecoder decoder;
if (!strcmp(argv[1], "-16"))
{
ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_COMPAT_16, ZYDIS_ADDRESS_WIDTH_16);
} else
if (!strcmp(argv[1], "-32"))
{
ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_COMPAT_32, ZYDIS_ADDRESS_WIDTH_32);
} else
if (!strcmp(argv[1], "-64"))
{
ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_64, ZYDIS_ADDRESS_WIDTH_64);
} else
{
fputs("Usage: ZydisInfo -[16|32|64] [hexbytes]\n", stderr);
return ZYDIS_STATUS_INVALID_PARAMETER;
}
uint8_t data[ZYDIS_MAX_INSTRUCTION_LENGTH];
uint8_t length = 0;
for (uint8_t i = 0; i < argc - 2; ++i)
{
if (length == ZYDIS_MAX_INSTRUCTION_LENGTH)
{
fprintf(stderr, "Maximum number of %d bytes exceeded", ZYDIS_MAX_INSTRUCTION_LENGTH);
return ZYDIS_STATUS_INVALID_PARAMETER;
}
size_t len = strlen(argv[i + 2]);
if (len % 2)
{
fputs("Even number of hex nibbles expected", stderr);
return ZYDIS_STATUS_INVALID_PARAMETER;
}
for (uint8_t j = 0; j < len / 2; ++j)
{
unsigned value;
if (!sscanf(&argv[i + 2][j * 2], "%02x", &value))
{
fputs("Invalid hex value", stderr);
return ZYDIS_STATUS_INVALID_PARAMETER;
}
data[i + j] = (uint8_t)value;
++length;
}
}
ZydisDecodedInstruction instruction;
ZydisStatus status = ZydisDecoderDecodeBuffer(&decoder, &data, length, 0, &instruction);
if (!ZYDIS_SUCCESS(status))
{
if (status >= ZYDIS_STATUS_USER)
{
fprintf(stderr,
"Could not decode instruction: User defined status code 0x%"PRIx32, status);
} else
{
fprintf(stderr, "Could not decode instruction: %s", ZydisFormatStatus(status));
}
return status;
}
printInstruction(&instruction);
return ZYDIS_STATUS_SUCCESS;
}
/* ============================================================================================== */
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