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bddisasm/disasmtool/disasmtool.c

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66 KiB
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/*
* Copyright (c) 2020 Bitdefender
* SPDX-License-Identifier: Apache-2.0
*/
#ifdef WIN32
#define _CRT_SECURE_NO_WARNINGS
#include <Windows.h>
#include <Intrin.h>
#endif // WIN32
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
// Main disasm header file.
#include "bdshemu.h"
#include "bddisasm.h"
#include "disasmtool.h"
#if !defined(WIN32) && (defined(ND_ARCH_X64) || defined(ND_ARCH_X86))
#include <cpuid.h>
#endif // defined(ND_ARCH_X64) || defined(ND_ARCH_X86)
const char *gSpaces[16] =
{
"",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
};
#if !defined(BDDISASM_HAS_VSNPRINTF)
//
// nd_vsnprintf
//
int
nd_vsnprintf_s(
char *buffer,
size_t sizeOfBuffer,
size_t count,
const char *format,
va_list argptr
)
{
return _vsnprintf_s(buffer, sizeOfBuffer, count, format, argptr);
}
#endif // !defined(BDDISASM_HAS_VSNPRINTF)
#if !defined(BDDISASM_HAS_MEMSET)
void*
nd_memset(void *s, int c, size_t n)
{
return memset(s, c, n);
}
#endif // !defined(BDDISASM_HAS_MEMSET)
#if defined(ND_ARCH_X64) || defined(ND_ARCH_X86)
#ifdef WIN32
#define cpuid __cpuid
#else
#define __rdtsc __builtin_ia32_rdtsc
void cpuid(int cpuInfo[4], int function_id)
{
unsigned int *cpuinfo = (unsigned int *)cpuInfo;
__get_cpuid(function_id, &cpuinfo[0], &cpuinfo[1], &cpuinfo[2], &cpuinfo[3]);
}
#endif // WIN32
#endif // defined(ND_ARCH_X64) || defined(ND_ARCH_X86)
#ifndef WIN32
#define _stricmp strcasecmp
#endif
#define FG_Black "\033[1;30m"
#define FG_Red "\033[1;31m"
#define FG_Green "\033[1;32m"
#define FG_Yellow "\033[1;33m"
#define FG_Blue "\033[1;34m"
#define FG_Magenta "\033[1;35m"
#define FG_Cyan "\033[1;36m"
#define FG_White "\033[1;37m"
void set_bold_fg_color(const char *Color)
{
printf(Color);
}
void reset_fg_color(void)
{
printf("\033[0m");
}
void
ShemuLog(
_In_ PCHAR Data,
_In_ void *Context
)
{
UNREFERENCED_PARAMETER(Context);
printf("%s", Data);
}
bool
ShemuAccessMem(
_In_ PSHEMU_CONTEXT Ctx,
_In_ uint64_t Gla,
_In_ size_t Size,
_Inout_ uint8_t *Buffer,
_In_ bool Store
)
{
UNREFERENCED_PARAMETER(Ctx);
UNREFERENCED_PARAMETER(Gla);
if (!Store)
{
// On loads, always return 0.
memset(Buffer, 0, Size);
}
else
{
// On stores, do nothing.
}
return true;
}
bool
ShemuAccessShellcode(
_In_ PSHEMU_CONTEXT Ctx,
_In_ uint64_t Gla,
_In_ size_t Size,
_Inout_ uint8_t *Buffer,
_In_ bool Store
)
{
ND_UINT32 offset;
offset = (ND_UINT32)(Gla - Ctx->ShellcodeBase);
if (Store)
{
memcpy(Ctx->Shellcode + offset, Buffer, Size);
}
else
{
memcpy(Buffer, Ctx->Shellcode + offset, Size);
}
return true;
}
const char*
set_to_string(
_In_ ND_INS_SET Set
)
{
switch (Set)
{
case ND_SET_3DNOW: return "3DNOW";
case ND_SET_ADX: return "ADX";
case ND_SET_AES: return "AES";
case ND_SET_APX_F: return "APX_F";
case ND_SET_AMD: return "AMD";
case ND_SET_AMXBF16: return "AMX-BF16";
case ND_SET_AMXFP16: return "AMX-FP16";
case ND_SET_AMXINT8: return "AMX-INT8";
case ND_SET_AMXTILE: return "AMX-TILE";
case ND_SET_AMXCOMPLEX: return "AMX-COMPLEX";
case ND_SET_AVX: return "AVX";
case ND_SET_AVX2: return "AVX2";
case ND_SET_AVX2GATHER: return "AVX2GATHER";
case ND_SET_AVX5124FMAPS: return "AVX5124FMAPS";
case ND_SET_AVX5124VNNIW: return "AVX5124VNNIW";
case ND_SET_AVX512BF16: return "AVX512BF16";
case ND_SET_AVX512BITALG: return "AVX512BITALG";
case ND_SET_AVX512BW: return "AVX512BW";
case ND_SET_AVX512CD: return "AVX512CD";
case ND_SET_AVX512DQ: return "AVX512DQ";
case ND_SET_AVX512ER: return "AVX512ER";
case ND_SET_AVX512F: return "AVX512F";
case ND_SET_AVX512IFMA: return "AVX512IFMA";
case ND_SET_AVX512PF: return "AVX512PF";
case ND_SET_AVX512VBMI: return "AVX512VBMI";
case ND_SET_AVX512VBMI2: return "AVX512VBMI2";
case ND_SET_AVX512VNNI: return "AVX512VNNI";
case ND_SET_AVX512VP2INTERSECT: return "AVX512VP2INTERSECT";
case ND_SET_AVX512VPOPCNTDQ: return "AVX512VPOPCNTDQ";
case ND_SET_AVX512FP16: return "AVX512FP16";
case ND_SET_AVXIFMA: return "AVXIFMA";
case ND_SET_AVXNECONVERT: return "AVXNECONVERT";
case ND_SET_AVXVNNI: return "AVXVNNI";
case ND_SET_AVXVNNIINT8: return "AVXVNNIINT8";
case ND_SET_AVXVNNIINT16: return "AVXVNNIINT16";
case ND_SET_BMI1: return "BMI1";
case ND_SET_BMI2: return "BMI2";
case ND_SET_CET_SS: return "CET_SS";
case ND_SET_CET_IBT: return "CET_IBT";
case ND_SET_CLDEMOTE: return "CLDEMOTE";
case ND_SET_CLFSH: return "CLFSH";
case ND_SET_CLFSHOPT: return "CLFSHOPT";
case ND_SET_CLWB: return "CLWB";
case ND_SET_CLZERO: return "CLZERO";
case ND_SET_CMPCCXADD: return "CMPCCXADD";
case ND_SET_CMPXCHG16B: return "CMPXCHG16B";
case ND_SET_ENQCMD: return "ENQCMD";
case ND_SET_F16C: return "F16C";
case ND_SET_FMA: return "FMA";
case ND_SET_FMA4: return "FMA4";
case ND_SET_FRED: return "FRED";
case ND_SET_FXSAVE: return "FXSAVE";
case ND_SET_GFNI: return "GFNI";
case ND_SET_HRESET: return "HRESET";
case ND_SET_I186: return "I186";
case ND_SET_I286PROT: return "I286PROT";
case ND_SET_I286REAL: return "I286REAL";
case ND_SET_I386: return "I386";
case ND_SET_I486: return "I486";
case ND_SET_I486REAL: return "I486REAL";
case ND_SET_I64: return "I64";
case ND_SET_I86: return "I86";
case ND_SET_INVPCID: return "INVPCID";
case ND_SET_INVLPGB: return "INVLPGB";
case ND_SET_KL: return "KL";
case ND_SET_LKGS: return "LKGS";
case ND_SET_LONGMODE: return "LONGMODE";
case ND_SET_LWP: return "LWP";
case ND_SET_LZCNT: return "LZCNT";
case ND_SET_MCOMMIT: return "MCOMMIT";
case ND_SET_MMX: return "MMX";
case ND_SET_MOVBE: return "MOVBE";
case ND_SET_MOVDIR64B: return "MOVDIR64B";
case ND_SET_MOVDIRI: return "MOVDIRI";
case ND_SET_MPX: return "MPX";
case ND_SET_MSRLIST: return "MSRLIST";
case ND_SET_MWAITT: return "MWAITT";
case ND_SET_PAUSE: return "PAUSE";
case ND_SET_PCLMULQDQ: return "PCLMULQDQ";
case ND_SET_PCONFIG: return "PCONFIG";
case ND_SET_PENTIUMREAL: return "PENTIUMREAL";
case ND_SET_PKU: return "PKU";
case ND_SET_POPCNT: return "POPCNT";
case ND_SET_PPRO: return "PPRO";
case ND_SET_PREFETCHITI: return "PREFETCHITI";
case ND_SET_PREFETCH_NOP: return "PREFETCH_NOP";
case ND_SET_PTWRITE: return "PTWRITE";
case ND_SET_RAOINT: return "RAOINT";
case ND_SET_RDPID: return "RDPID";
case ND_SET_RDPMC: return "RDPMC";
case ND_SET_RDPRU: return "RDPRU";
case ND_SET_RDRAND: return "RDRAND";
case ND_SET_RDSEED: return "RDSEED";
case ND_SET_RDTSCP: return "RDTSCP";
case ND_SET_RDWRFSGS: return "RDWRFSGS";
case ND_SET_SERIALIZE: return "SERIALIZE";
case ND_SET_SGX: return "SGX";
case ND_SET_SHA: return "SHA";
case ND_SET_SHA512: return "SHA512";
case ND_SET_SM3: return "SM3";
case ND_SET_SM4: return "SM4";
case ND_SET_SMAP: return "SMAP";
case ND_SET_SMX: return "SMX";
case ND_SET_SNP: return "SNP";
case ND_SET_SSE: return "SSE";
case ND_SET_SSE2: return "SSE2";
case ND_SET_SSE3: return "SSE3";
case ND_SET_SSE4: return "SSE4";
case ND_SET_SSE42: return "SSE42";
case ND_SET_SSE4A: return "SSE4A";
case ND_SET_SSSE3: return "SSSE3";
case ND_SET_SVM: return "SVM";
case ND_SET_TBM: return "TBM";
case ND_SET_TDX: return "TDX";
case ND_SET_TSE: return "TSE";
case ND_SET_TSX: return "TSX";
case ND_SET_TSXLDTRK: return "TSXLDTRK";
case ND_SET_UD: return "UD";
case ND_SET_UINTR: return "UINTR";
case ND_SET_UNKNOWN: return "UNKNOWN";
case ND_SET_USER_MSR: return "USER_MSR";
case ND_SET_VAES: return "VAES";
case ND_SET_VPCLMULQDQ: return "VPCLMULQDQ";
case ND_SET_VTX: return "VTX";
case ND_SET_WAITPKG: return "WAITPKG";
case ND_SET_WBNOINVD: return "WBNOINVD";
case ND_SET_WRMSRNS: return "WRMSRNS";
case ND_SET_X87: return "X87";
case ND_SET_XOP: return "XOP";
case ND_SET_XSAVE: return "XSAVE";
case ND_SET_XSAVEC: return "XSAVEC";
case ND_SET_XSAVES: return "XSAVES";
default: return "???";
}
}
const char*
category_to_string(
_In_ ND_INS_CATEGORY Category
)
{
switch (Category)
{
case ND_CAT_3DNOW: return "3DNOW";
case ND_CAT_AES: return "AES";
case ND_CAT_AESKL: return "AESKL";
case ND_CAT_ARITH: return "ARITH";
case ND_CAT_AMX: return "AMX";
case ND_CAT_APX: return "APX";
case ND_CAT_AVX: return "AVX";
case ND_CAT_AVX2: return "AVX2";
case ND_CAT_AVX2GATHER: return "AVX2GATHER";
case ND_CAT_AVX512: return "AVX512";
case ND_CAT_AVX512BF16: return "AVX512BF16";
case ND_CAT_AVX512VBMI: return "AVX512VBMI";
case ND_CAT_AVX512VP2INTERSECT: return "AVX512VP2INTERSECT";
case ND_CAT_AVX512FP16: return "AVX512FP16";
case ND_CAT_AVXIFMA: return "AVXIFMA";
case ND_CAT_AVXVNNI: return "AVXVNNI";
case ND_CAT_AVXVNNIINT8: return "AVXVNNIINT8";
case ND_CAT_AVXVNNIINT16: return "AVXVNNIINT16";
case ND_CAT_AVXNECONVERT: return "AVXNECONVERT";
case ND_CAT_BITBYTE: return "BITBYTE";
case ND_CAT_BLEND: return "BLEND";
case ND_CAT_BMI1: return "BMI1";
case ND_CAT_BMI2: return "BMI2";
case ND_CAT_BROADCAST: return "BROADCAST";
case ND_CAT_CALL: return "CALL";
case ND_CAT_CET: return "CET";
case ND_CAT_CLDEMOTE: return "CLDEMOTE";
case ND_CAT_CMOV: return "CMOV";
case ND_CAT_CMPCCXADD: return "CMPCCXADD";
case ND_CAT_COMPRESS: return "COMPRESS";
case ND_CAT_COND_BR: return "COND_BR";
case ND_CAT_CONFLICT: return "CONFLICT";
case ND_CAT_CONVERT: return "CONVERT";
case ND_CAT_DATAXFER: return "DATAXFER";
case ND_CAT_DECIMAL: return "DECIMAL";
case ND_CAT_ENQCMD: return "ENQCMD";
case ND_CAT_EXPAND: return "EXPAND";
case ND_CAT_FLAGOP: return "FLAGOP";
case ND_CAT_FMA4: return "FMA4";
case ND_CAT_GATHER: return "GATHER";
case ND_CAT_GFNI: return "GFNI";
case ND_CAT_HRESET: return "HRESET";
case ND_CAT_I386: return "I386";
case ND_CAT_IFMA: return "IFMA";
case ND_CAT_INTERRUPT: return "INTERRUPT";
case ND_CAT_IO: return "IO";
case ND_CAT_IOSTRINGOP: return "IOSTRINGOP";
case ND_CAT_KL: return "KL";
case ND_CAT_KMASK: return "KMASK";
case ND_CAT_KNL: return "KNL";
case ND_CAT_LKGS: return "LKGS";
case ND_CAT_LOGIC: return "LOGIC";
case ND_CAT_LOGICAL: return "LOGICAL";
case ND_CAT_LOGICAL_FP: return "LOGICAL_FP";
case ND_CAT_LWP: return "LWP";
case ND_CAT_LZCNT: return "LZCNT";
case ND_CAT_MISC: return "MISC";
case ND_CAT_MMX: return "MMX";
case ND_CAT_MOVDIR64B: return "MOVDIR64B";
case ND_CAT_MOVDIRI: return "MOVDIRI";
case ND_CAT_MPX: return "MPX";
case ND_CAT_NOP: return "NOP";
case ND_CAT_PCLMULQDQ: return "PCLMULQDQ";
case ND_CAT_PCONFIG: return "PCONFIG";
case ND_CAT_POP: return "POP";
case ND_CAT_PREFETCH: return "PREFETCH";
case ND_CAT_PTWRITE: return "PTWRITE";
case ND_CAT_PUSH: return "PUSH";
case ND_CAT_RAOINT: return "RAO-INT";
case ND_CAT_RDPID: return "RDPID";
case ND_CAT_RDRAND: return "RDRAND";
case ND_CAT_RDSEED: return "RDSEED";
case ND_CAT_RDWRFSGS: return "RDWRFSGS";
case ND_CAT_RET: return "RET";
case ND_CAT_ROTATE: return "ROTATE";
case ND_CAT_SCATTER: return "SCATTER";
case ND_CAT_SEGOP: return "SEGOP";
case ND_CAT_SEMAPHORE: return "SEMAPHORE";
case ND_CAT_SGX: return "SGX";
case ND_CAT_SHA: return "SHA";
case ND_CAT_SHA512: return "SHA512";
case ND_CAT_SHIFT: return "SHIFT";
case ND_CAT_SM3: return "SM3";
case ND_CAT_SM4: return "SM4";
case ND_CAT_SMAP: return "SMAP";
case ND_CAT_SSE: return "SSE";
case ND_CAT_SSE2: return "SSE2";
case ND_CAT_STRINGOP: return "STRINGOP";
case ND_CAT_STTNI: return "STTNI";
case ND_CAT_SYSCALL: return "SYSCALL";
case ND_CAT_SYSRET: return "SYSRET";
case ND_CAT_SYSTEM: return "SYSTEM";
case ND_CAT_TDX: return "TDX";
case ND_CAT_UD: return "UD";
case ND_CAT_UINTR: return "UINTR";
case ND_CAT_UNCOND_BR: return "UNCOND_BR";
case ND_CAT_UNKNOWN: return "UNKNOWN";
case ND_CAT_USER_MSR: return "USER_MSR";
case ND_CAT_VAES: return "VAES";
case ND_CAT_VFMA: return "VFMA";
case ND_CAT_VFMAPS: return "VFMAPS";
case ND_CAT_VNNI: return "VNNI";
case ND_CAT_VNNIW: return "VNNIW";
case ND_CAT_VPCLMULQDQ: return "VPCLMULQDQ";
case ND_CAT_VPOPCNT: return "VPOPCNT";
case ND_CAT_VTX: return "VTX";
case ND_CAT_WAITPKG: return "WAITPKG";
case ND_CAT_WBNOINVD: return "WBNOINVD";
case ND_CAT_WIDENOP: return "WIDENOP";
case ND_CAT_WIDE_KL: return "WIDE_KL";
case ND_CAT_X87_ALU: return "X87_ALU";
case ND_CAT_XOP: return "XOP";
case ND_CAT_XSAVE: return "XSAVE";
default: return "???";
}
}
const char*
optype_to_string(
_In_ ND_OPERAND_TYPE OpType
)
{
switch (OpType)
{
case ND_OP_REG: return "Register";
case ND_OP_IMM: return "Immediate";
case ND_OP_CONST: return "Constant";
case ND_OP_MEM: return "Memory";
case ND_OP_ADDR: return "Address";
case ND_OP_ADDR_NEAR: return "Address";
case ND_OP_OFFS: return "Offset";
case ND_OP_BANK: return "Bank";
case ND_OP_DFV: return "Default flags";
default: return "???";
}
}
const char*
regtype_to_string(
_In_ ND_REG_TYPE RegType
)
{
switch (RegType)
{
case ND_REG_GPR: return "General Purpose";
case ND_REG_SEG: return "Segment";
case ND_REG_FPU: return "FP";
case ND_REG_MMX: return "MMX";
case ND_REG_SSE: return "Vector";
case ND_REG_BND: return "Bound";
case ND_REG_MSK: return "Mask";
case ND_REG_TILE: return "Tile";
case ND_REG_SYS: return "System";
case ND_REG_MSR: return "Model Specific";
case ND_REG_XCR: return "Extended Control";
case ND_REG_CR: return "Control";
case ND_REG_DR: return "Debug";
case ND_REG_TR: return "Test";
case ND_REG_MXCSR: return "MXCSR";
case ND_REG_PKRU: return "PKRU";
case ND_REG_SSP: return "SSP";
case ND_REG_FLG: return "Flags";
case ND_REG_RIP: return "IP";
case ND_REG_UIF: return "UIF";
default: return "???";
}
}
const char*
encoding_to_string(
_In_ ND_OPERAND_ENCODING Encoding
)
{
switch (Encoding)
{
case ND_OPE_R: return "R";
case ND_OPE_M: return "M";
case ND_OPE_V: return "V";
case ND_OPE_O: return "O";
case ND_OPE_I: return "I";
case ND_OPE_D: return "D";
case ND_OPE_C: return "C";
case ND_OPE_1: return "1";
case ND_OPE_A: return "A";
case ND_OPE_L: return "L";
case ND_OPE_E: return "E";
case ND_OPE_S: return "S";
default: return "";
}
}
const char*
tuple_to_string(
_In_ ND_TUPLE Tuple
)
{
switch (Tuple)
{
case ND_TUPLE_FV: return "Full";
case ND_TUPLE_HV: return "Half";
case ND_TUPLE_FVM: return "Full Mem";
case ND_TUPLE_HVM: return "Half Mem";
case ND_TUPLE_QVM: return "Quarter Mem";
case ND_TUPLE_OVM: return "Eigth Mem";
case ND_TUPLE_T1S: return "Tuple 1 Scalar";
case ND_TUPLE_T1F: return "Tuple 1 Fixes";
case ND_TUPLE_T2: return "Tuple 2";
case ND_TUPLE_T4: return "Tuple 4";
case ND_TUPLE_T8: return "Tuple 8";
case ND_TUPLE_M128: return "Mem 128";
case ND_TUPLE_DUP: return "MOVDDUP";
case ND_TUPLE_T1S8: return "Tuple 1 scalar, 8 bit";
case ND_TUPLE_T1S16: return "Tuple 1 scalar, 16 bit";
case ND_TUPLE_T1_4X: return "Tuple 4 x 32 bit";
default: return "None";
}
}
const char*
exception_type_to_string(
_In_ ND_EX_TYPE ExType
)
{
switch (ExType)
{
case ND_EXT_1: return "1";
case ND_EXT_2: return "2";
case ND_EXT_3: return "3";
case ND_EXT_4: return "4";
case ND_EXT_5: return "5";
case ND_EXT_6: return "6";
case ND_EXT_7: return "7";
case ND_EXT_8: return "8";
case ND_EXT_9: return "9";
case ND_EXT_10: return "10";
case ND_EXT_11: return "11";
case ND_EXT_12: return "12";
case ND_EXT_13: return "13";
case ND_EXT_14: return "14";
case ND_EXT_K20: return "K20";
case ND_EXT_K21: return "K21";
case ND_EXT_E1: return "E1";
case ND_EXT_E1NF: return "E1NF";
case ND_EXT_E2: return "E2";
case ND_EXT_E3: return "E3";
case ND_EXT_E3NF: return "E3NF";
case ND_EXT_E4: return "E4";
case ND_EXT_E4nb: return "E4.nb";
case ND_EXT_E4NF: return "E4NF";
case ND_EXT_E4NFnb: return "E4NF.nb";
case ND_EXT_E5: return "E5";
case ND_EXT_E5NF: return "E5NF";
case ND_EXT_E6: return "E6";
case ND_EXT_E6NF: return "E6NF";
case ND_EXT_E7NM: return "E7NM";
case ND_EXT_E9: return "E9";
case ND_EXT_E9NF: return "E9NF";
case ND_EXT_E10: return "E10";
case ND_EXT_E10NF: return "E10NF";
case ND_EXT_E11: return "E11";
case ND_EXT_E12: return "E12";
case ND_EXT_E12NP: return "E12NP";
case ND_EXT_AMX_E1: return "AMX-E1";
case ND_EXT_AMX_E2: return "AMX-E2";
case ND_EXT_AMX_E3: return "AMX-E3";
case ND_EXT_AMX_E4: return "AMX-E4";
case ND_EXT_AMX_E5: return "AMX-E5";
case ND_EXT_AMX_E6: return "AMX-E6";
case ND_EXT_AMX_EVEX_E1: return "AMX-EVEX-E1";
case ND_EXT_AMX_EVEX_E2: return "AMX-EVEX-E2";
case ND_EXT_AMX_EVEX_E3: return "AMX-EVEX-E3";
case ND_EXT_APX_EVEX_BMI: return "APX-EVEX-BMI";
case ND_EXT_APX_EVEX_CCMP: return "APX-EVEX-CCMP";
case ND_EXT_APX_EVEX_WRSS: return "APX-EVEX-WRSS";
case ND_EXT_APX_EVEX_WRUSS: return "APX-EVEX-WRUSS";
case ND_EXT_APX_EVEX_CFCMOV: return "APX-EVEX-CFCMOV";
case ND_EXT_APX_EVEX_CMPCCXADD: return "APX-EVEX-CMPCCXADD";
case ND_EXT_APX_EVEX_ENQCMD: return "APX-EVEX-ENQCMD";
case ND_EXT_APX_EVEX_INT: return "APX-EVEX-INT";
case ND_EXT_APX_EVEX_INVEPT: return "APX-EVEX-INVEPT";
case ND_EXT_APX_EVEX_INVPCID: return "APX-EVEX-INVPCID";
case ND_EXT_APX_EVEX_INVVPID: return "APX-EVEX-INVVPID";
case ND_EXT_APX_EVEX_KEYLOCKER: return "APX-EVEX-KEYLOCKER";
case ND_EXT_APX_EVEX_KMOV: return "APX-EVEX-KMOV";
case ND_EXT_APX_EVEX_PP2: return "APX-EVEX-PP2";
case ND_EXT_APX_EVEX_SHA: return "APX-EVEX-SHA";
case ND_EXT_APX_EVEX_RAOINT: return "APX-EVEX-RAO-INT";
case ND_EXT_APX_EVEX_USER_MSR: return "APX-EVEX-USER-MSR";
default: return "None";
}
}
ND_BOOL
is_hex_digit(
_In_ char Digit
)
{
return (Digit >= '0' && Digit <= '9') ||
(Digit >= 'A' && Digit <= 'F') ||
(Digit >= 'a' && Digit <= 'f');
}
BYTE
hex_to_bin(
_In_ char HexByte
)
{
// Transforms one hex-digit to a number.
if ((HexByte >= '0') && (HexByte <= '9'))
{
return HexByte - '0';
}
else if ((HexByte >= 'A') && (HexByte <= 'F'))
{
return HexByte - 'A' + 10;
}
else if ((HexByte >= 'a') && (HexByte <= 'f'))
{
return HexByte - 'a' + 10;
}
return 0;
}
INT32
regstr_to_idx(
_In_ const char *Reg
)
{
static const char *reg64[] =
{
"rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
};
for (INT32 i = 0; i < (INT32)ARRAYSIZE(reg64); i++)
{
if (!_stricmp(Reg, reg64[i]))
{
return i;
}
}
return -1;
}
_Success_(return)
bool
match_gpr(
_In_ const char *Arg,
_Out_ DWORD *Index
)
{
// Check if the provided argument is a register.
if (Arg[0] == '-')
{
INT32 idx = regstr_to_idx(Arg + 1); // this will be the name of the register or the NULL terminator
if (idx >= 0)
{
*Index = idx;
return true;
}
}
return false;
}
void
print_instruction(
_In_ size_t Rip,
_In_ PINSTRUX Instrux,
_In_ PDISASM_OPTIONS Options
)
{
char instruxText[ND_MIN_BUF_SIZE];
DWORD k = 0, idx = 0, i = 0;
printf("%016zX ", Rip);
if (Options->Highlight)
{
#ifdef WIN32
// Enable virtual terminal processing on Windows, so we can display colors.
HANDLE consoleHandle = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD consoleMode;
if (consoleHandle == INVALID_HANDLE_VALUE)
{
return;
}
if (!GetConsoleMode(consoleHandle, &consoleMode))
{
return;
}
SetConsoleMode(consoleHandle, consoleMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
#endif
// Display prefixes.
set_bold_fg_color(FG_White);
for (idx = 0; idx < Instrux->PrefLength; idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
// Display opcodes.
set_bold_fg_color(FG_Green);
for (idx = 0; idx < (DWORD)(ND_IS_3DNOW(Instrux) ? Instrux->OpLength - 1 : Instrux->OpLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
// Display modrm and sib.
set_bold_fg_color(FG_Yellow);
for (idx = 0; idx < (DWORD)(Instrux->HasModRm + Instrux->HasSib); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
// Display displacement.
set_bold_fg_color(FG_Blue);
for (idx = 0; idx < (DWORD)(Instrux->DispLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
// Display relative offset/moffset/immediates.
set_bold_fg_color(FG_Red);
for (idx = 0; idx < (DWORD)(Instrux->Imm1Length + Instrux->Imm2Length +
Instrux->RelOffsLength + Instrux->MoffsetLength +
Instrux->HasSseImm + Instrux->AddrLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
if (ND_IS_3DNOW(Instrux))
{
set_bold_fg_color(FG_Green);
for (; k < Instrux->Length; k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
reset_fg_color();
}
#ifdef WIN32
// Reset console mode on Windows.
SetConsoleMode(consoleHandle, consoleMode);
#endif
}
for (; k < Instrux->Length; k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
printf("%s", gSpaces[16 - (Instrux->Length & 0xF)]);
NdToText(Instrux, Rip, ND_MIN_BUF_SIZE, instruxText);
printf("%s\n", instruxText);
if (Options->ExtendedInfo)
{
const BYTE opsize[3] = { 2, 4, 8 };
const BYTE adsize[3] = { 2, 4, 8 };
const BYTE veclen[3] = { 16, 32, 64 };
printf(" DSIZE: %2d, ASIZE: %2d, VLEN: ", opsize[Instrux->EfOpMode] * 8, adsize[Instrux->AddrMode] * 8);
if (ND_HAS_VECTOR(Instrux))
{
printf("%2d\n", veclen[Instrux->VecMode] * 8);
}
else
{
printf("-\n");
}
printf(" ISA Set: %s, Ins cat: %s, CET tracked: %s\n",
set_to_string(Instrux->IsaSet), category_to_string(Instrux->Category),
Instrux->IsCetTracked ? "yes" : "no");
if (0 != Instrux->CpuidFlag.Flag)
{
char *regs[4] = { "eax", "ecx", "edx", "ebx" };
printf(" CPUID leaf: 0x%08x", Instrux->CpuidFlag.Leaf);
if (Instrux->CpuidFlag.SubLeaf != ND_CFF_NO_SUBLEAF)
{
printf(", sub-leaf: 0x%08x", Instrux->CpuidFlag.SubLeaf);
}
printf(", reg: %s, bit: %u\n", regs[Instrux->CpuidFlag.Reg], Instrux->CpuidFlag.Bit);
}
if (Instrux->HasEvex)
{
printf(" EVEX Tuple Type: %s\n",
tuple_to_string((ND_TUPLE)Instrux->TupleType));
}
if (Instrux->ExceptionType != ND_EXT_None)
{
printf(" Exception class: %s, ",
Instrux->ExceptionType >= ND_EXT_1 && Instrux->ExceptionType <= ND_EXT_14 ? "SSE/VEX" :
Instrux->ExceptionType >= ND_EXT_E1 && Instrux->ExceptionType <= ND_EXT_E12NP ? "EVEX" :
Instrux->ExceptionType >= ND_EXT_K20 && Instrux->ExceptionType <= ND_EXT_K21 ? "Opmask" :
Instrux->ExceptionType >= ND_EXT_AMX_E1 && Instrux->ExceptionType <= ND_EXT_AMX_E6 ? "AMX" :
Instrux->ExceptionType >= ND_EXT_AMX_EVEX_E1 && Instrux->ExceptionType <= ND_EXT_APX_EVEX_USER_MSR ? "APX" : "???");
printf("exception type: %s\n", exception_type_to_string(Instrux->ExceptionType));
}
if (Instrux->RflAccess != 0)
{
DWORD fidx, all;
bool individual = false;
char *flags[22] = { "CF", NULL, "PF", NULL, "AF", NULL, "ZF", "SF", "TF", "IF", "DF",
"OF", "IOPL",NULL, "NT", NULL, "RF", "VM", "AC", "VIF", "VIP", "ID" };
all = Instrux->FlagsAccess.Tested.Raw | Instrux->FlagsAccess.Modified.Raw | Instrux->FlagsAccess.Set.Raw |
Instrux->FlagsAccess.Cleared.Raw | Instrux->FlagsAccess.Undefined.Raw;
printf(" FLAGS access\n ");
for (fidx = 0; fidx < 21; fidx++)
{
if (flags[fidx] != NULL)
{
if (0 == (all & (1ULL << fidx)))
{
continue;
}
individual = true;
printf("%s: ", flags[fidx]);
if (Instrux->FlagsAccess.Tested.Raw & (1ULL << fidx))
{
printf("t");
}
if (Instrux->FlagsAccess.Modified.Raw & (1ULL << fidx))
{
printf("m");
}
if (Instrux->FlagsAccess.Set.Raw & (1ULL << fidx))
{
printf("1");
}
if (Instrux->FlagsAccess.Cleared.Raw & (1ULL << fidx))
{
printf("0");
}
if (Instrux->FlagsAccess.Undefined.Raw & (1ULL << fidx))
{
printf("u");
}
printf(", ");
}
}
if (!individual)
{
printf("Entire register");
}
printf("\n");
}
if (Instrux->IsaSet == ND_SET_X87)
{
#define FPU_FLG_ACC_TO_STR(x) ((x) == ND_FPU_FLAG_UNDEFINED ? "u" : \
(x) == ND_FPU_FLAG_MODIFIED ? "m" : (x) == ND_FPU_FLAG_SET_0 ? "0" : "1")
printf(" FPU flags access\n C0: %s, C1: %s, C2: %s, C3: %s, \n",
FPU_FLG_ACC_TO_STR(Instrux->FpuFlagsAccess.C0), FPU_FLG_ACC_TO_STR(Instrux->FpuFlagsAccess.C1),
FPU_FLG_ACC_TO_STR(Instrux->FpuFlagsAccess.C2), FPU_FLG_ACC_TO_STR(Instrux->FpuFlagsAccess.C3));
}
printf(" Valid modes\n"
" R0: %s, R1: %s, R2: %s, R3: %s\n"
" Real: %s, V8086: %s, Prot: %s, Compat: %s, Long: %s\n"
" SMM on: %s, SMM off: %s, SGX on: %s, SGX off: %s, TSX on: %s, TSX off: %s\n"
" VMXRoot: %s, VMXNonRoot: %s, VMXRoot SEAM: %s, VMXNonRoot SEAM: %s, VMX off: %s\n",
Instrux->ValidModes.Ring0 ? "yes" : "no",
Instrux->ValidModes.Ring1 ? "yes" : "no",
Instrux->ValidModes.Ring2 ? "yes" : "no",
Instrux->ValidModes.Ring3 ? "yes" : "no",
Instrux->ValidModes.Real ? "yes" : "no",
Instrux->ValidModes.V8086 ? "yes" : "no",
Instrux->ValidModes.Protected ? "yes" : "no",
Instrux->ValidModes.Compat ? "yes" : "no",
Instrux->ValidModes.Long ? "yes" : "no",
Instrux->ValidModes.Smm ? "yes" : "no",
Instrux->ValidModes.SmmOff ? "yes" : "no",
Instrux->ValidModes.Sgx ? "yes" : "no",
Instrux->ValidModes.SgxOff ? "yes" : "no",
Instrux->ValidModes.Tsx ? "yes" : "no",
Instrux->ValidModes.TsxOff ? "yes" : "no",
Instrux->ValidModes.VmxRoot ? "yes" : "no",
Instrux->ValidModes.VmxNonRoot ? "yes" : "no",
Instrux->ValidModes.VmxRootSeam ? "yes" : "no",
Instrux->ValidModes.VmxNonRootSeam ? "yes" : "no",
Instrux->ValidModes.VmxOff ? "yes" : "no"
);
printf(" Valid prefixes\n"
" REP: %s, REPcc: %s, LOCK: %s\n"
" HLE: %s, XACQUIRE only: %s, XRELEASE only: %s\n"
" BND: %s, BHINT: %s, DNT: %s\n",
Instrux->ValidPrefixes.Rep ? "yes" : "no",
Instrux->ValidPrefixes.RepCond ? "yes" : "no",
Instrux->ValidPrefixes.Lock ? "yes" : "no",
Instrux->ValidPrefixes.Hle ? "yes" : "no",
Instrux->ValidPrefixes.Xacquire ? "yes" : "no",
Instrux->ValidPrefixes.Xrelease ? "yes" : "no",
Instrux->ValidPrefixes.Bnd ? "yes" : "no",
Instrux->ValidPrefixes.Bhint ? "yes" : "no",
Instrux->ValidPrefixes.Dnt ? "yes" : "no"
);
for (i = 0; i < Instrux->OperandsCount; i++)
{
printf(" Operand: %u, Acc: %s, Type: %10s, Size: %2d, RawSize: %2d, Encoding: %s", i,
Instrux->Operands[i].Access.Access == ND_ACCESS_READ ? "R-" :
Instrux->Operands[i].Access.Access == ND_ACCESS_WRITE ? "-W" :
Instrux->Operands[i].Access.Access == (ND_ACCESS_READ|ND_ACCESS_WRITE) ? "RW" :
Instrux->Operands[i].Access.Access == ND_ACCESS_COND_READ ? "CR" :
Instrux->Operands[i].Access.Access == ND_ACCESS_COND_WRITE ? "CW" :
Instrux->Operands[i].Access.Access == (ND_ACCESS_COND_READ|ND_ACCESS_COND_WRITE) ? "CRCW" :
Instrux->Operands[i].Access.Access == (ND_ACCESS_READ | ND_ACCESS_COND_WRITE) ? "RCW" :
Instrux->Operands[i].Access.Access == (ND_ACCESS_COND_READ|ND_ACCESS_WRITE) ? "CRW" :
Instrux->Operands[i].Access.Access == ND_ACCESS_PREFETCH ? "P" : "--",
optype_to_string(Instrux->Operands[i].Type), (int)Instrux->Operands[i].Size,
Instrux->Operands[i].Type == ND_OP_IMM ? Instrux->Operands[i].Info.Immediate.RawSize :
Instrux->Operands[i].Type == ND_OP_OFFS ? Instrux->Operands[i].Info.RelativeOffset.RawSize :
Instrux->Operands[i].Size,
encoding_to_string(Instrux->Operands[i].Encoding)
);
if (ND_OP_MEM == Instrux->Operands[i].Type)
{
printf(", ");
if (Instrux->Operands[i].Info.Memory.IsRipRel)
{
printf("RIP relative: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsAG)
{
printf("Address Generator: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsBitbase)
{
printf("Bitbase Addressing: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsMib)
{
printf("MIB Addressing: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsVsib)
{
printf("VSIB Addressing: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsSibMem)
{
printf("Sibmem Addressing: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsStack)
{
printf("Stack: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsString)
{
printf("String: yes, ");
}
if (Instrux->Operands[i].Info.Memory.IsShadowStack)
{
printf("Shadow stack: %d, ", Instrux->Operands[i].Info.Memory.ShStkType);
}
if (Instrux->Operands[i].Info.Memory.HasCompDisp)
{
printf("Compressed displacement: yes, ");
}
if (Instrux->Operands[i].Info.Memory.HasBroadcast)
{
printf("Broadcast: yes, ");
}
printf("\n ");
if (Instrux->Operands[i].Info.Memory.HasSeg)
{
printf("Segment: %d, ", Instrux->Operands[i].Info.Memory.Seg);
}
if (Instrux->Operands[i].Info.Memory.HasBase)
{
printf("Base: %d, ", Instrux->Operands[i].Info.Memory.Base);
}
if (Instrux->Operands[i].Info.Memory.HasIndex)
{
printf("Index: %d * %d, ",
Instrux->Operands[i].Info.Memory.Index, Instrux->Operands[i].Info.Memory.Scale);
}
if (Instrux->Operands[i].Info.Memory.HasDisp)
{
printf("Displacement: 0x%016llx, ", (unsigned long long)Instrux->Operands[i].Info.Memory.Disp);
}
if (Instrux->Operands[i].Info.Memory.IsVsib)
{
printf("\n ");
printf("VSIB index size: %d, VSIB element size: %d, VSIB element count: %d",
Instrux->Operands[i].Info.Memory.Vsib.IndexSize,
Instrux->Operands[i].Info.Memory.Vsib.ElemSize,
Instrux->Operands[i].Info.Memory.Vsib.ElemCount);
}
}
if (ND_OP_REG == Instrux->Operands[i].Type)
{
printf(", RegType: %16s, RegSize: %2u, ",
regtype_to_string(Instrux->Operands[i].Info.Register.Type),
Instrux->Operands[i].Info.Register.Size);
if (Instrux->Operands[i].Info.Register.Type == ND_REG_MSR)
{
printf("RegId: 0x%08x, RegCount: %u\n",
Instrux->Operands[i].Info.Register.Reg,
Instrux->Operands[i].Info.Register.Count);
}
else
{
printf("RegId: %u, RegCount: %u\n",
Instrux->Operands[i].Info.Register.Reg,
Instrux->Operands[i].Info.Register.Count);
}
}
else
{
printf("\n");
}
if (Instrux->Operands[i].Decorator.HasBroadcast)
{
printf(" Decorator: Broadcast %d bytes element %d times\n",
Instrux->Operands[i].Info.Memory.Broadcast.Size,
Instrux->Operands[i].Info.Memory.Broadcast.Count);
}
if (Instrux->Operands[i].Decorator.HasMask)
{
printf(" Decorator: Mask k%d\n", Instrux->Operands[i].Decorator.Msk);
}
if (Instrux->Operands[i].Decorator.HasZero)
{
printf(" Decorator: Zero (no merging)\n");
}
}
printf("\n");
}
if (Options->BitFields && Instrux->HasModRm)
{
printf(" Instruction bit fields:\n");
if (Instrux->HasEvex)
{
printf(" EVEX: 0x%02x 0x%02x 0x%02x 0x%02x > mm: %d, R': %d, B: %d, X: %d, R: %d, pp: %d, "
"vvvv: %d, W: %d, aaa: %d, V': %d, b: %d, L'L: %d, z: %d\n",
Instrux->Evex.Evex[0], Instrux->Evex.Evex[1], Instrux->Evex.Evex[2], Instrux->Evex.Evex[3],
Instrux->Evex.m, Instrux->Evex.rp, Instrux->Evex.b, Instrux->Evex.x, Instrux->Evex.r, Instrux->Evex.p,
Instrux->Evex.v, Instrux->Evex.w, Instrux->Evex.a, Instrux->Evex.vp, Instrux->Evex.bm, Instrux->Evex.l,
Instrux->Evex.z);
}
if (Instrux->HasVex)
{
if (Instrux->VexMode == ND_VEXM_2B)
{
printf(" VEX2: 0x%02x 0x%02x > pp: %d, L: %d, vvvv: %d, R: %d\n",
Instrux->Vex2.Vex[0], Instrux->Vex2.Vex[1], Instrux->Vex2.p, Instrux->Vex2.l, Instrux->Vex2.v,
Instrux->Vex2.r);
}
else
{
printf(" VEX3: 0x%02x 0x%02x 0x%02x > m-mmmm: %d, B: %d, X: %d, R: %d, pp: %d, L: %d, vvvv: %d, W: %d\n",
Instrux->Vex3.Vex[0], Instrux->Vex3.Vex[1], Instrux->Vex3.Vex[2], Instrux->Vex3.m, Instrux->Vex3.b,
Instrux->Vex3.x, Instrux->Vex3.r, Instrux->Vex3.p, Instrux->Vex3.l, Instrux->Vex3.v, Instrux->Vex3.w);
}
}
if (Instrux->HasXop)
{
printf(" XOP: 0x%02x 0x%02x 0x%02x > m: %d, B: %d, X: %d, R: %d, p: %d, L: %d, v: %d, W: %d\n",
Instrux->Xop.Xop[0], Instrux->Xop.Xop[1], Instrux->Xop.Xop[2], Instrux->Xop.m, Instrux->Xop.b,
Instrux->Xop.x, Instrux->Xop.r, Instrux->Xop.p, Instrux->Xop.l, Instrux->Xop.v, Instrux->Xop.w);
}
if (Instrux->HasRex)
{
printf(" REX: 0x%02x > B: %d, X: %d, R: %d, W: %d\n",
Instrux->Rex.Rex, Instrux->Rex.b, Instrux->Rex.x, Instrux->Rex.r, Instrux->Rex.w);
}
if (Instrux->HasModRm)
{
printf(" ModR/M: 0x%02x > mod: %d, reg: %d, rm: %d\n",
Instrux->ModRm.ModRm, Instrux->ModRm.mod, Instrux->ModRm.reg, Instrux->ModRm.rm);
}
if (Instrux->HasSib)
{
printf(" SIB: 0x%02x > scale: %d, index: %d, base: %d\n",
Instrux->Sib.Sib, Instrux->Sib.scale, Instrux->Sib.index, Instrux->Sib.base);
}
}
}
void
handle_disasm(
_In_ PDISASM_OPTIONS Options
)
{
INSTRUX instrux;
ND_CONTEXT ctx = { 0 };
unsigned long long icount = 0, istart, iend, start, end, itotal = 0, tilen = 0, ticount = 0;
size_t rip, fsize = Options->Size;
PBYTE buffer = Options->Buffer;
start = clock();
NdInitContext(&ctx);
ctx.DefCode = Options->Mode;
ctx.DefData = Options->Mode;
ctx.DefStack = Options->Mode;
ctx.VendMode = Options->Vendor;
ctx.FeatMode = Options->Feature;
// Disassemble
rip = Options->Offset;
while (rip < Options->Size)
{
NDSTATUS status;
icount++;
#if defined(ND_ARCH_X86) || defined(ND_ARCH_X64)
istart = __rdtsc();
#else
istart = 0;
#endif
status = NdDecodeWithContext(&instrux, buffer + rip, fsize - rip, &ctx);
#if defined(ND_ARCH_X86) || defined(ND_ARCH_X64)
iend = __rdtsc();
#else
iend = 1;
#endif
itotal += iend - istart;
if (!ND_SUCCESS(status))
{
if (Options->Print)
{
printf("%016zX ", rip + Options->Rip);
printf("%02x", buffer[rip]);
printf("%s", gSpaces[16 - 1]);
printf("db 0x%02x (0x%08x)\n", buffer[rip], status);
}
if (Options->Skip16)
{
rip += 16;
}
else
{
rip++;
}
}
else
{
tilen += instrux.Length;
ticount++;
if (Options->Print)
{
print_instruction(rip + Options->Rip, &instrux, Options);
}
if (Options->Skip16)
{
rip += 16;
}
else if (Options->Skip1)
{
rip++;
}
else
{
rip += instrux.Length;
}
}
}
end = clock();
if (Options->Stats)
{
printf("Disassembled %llu instructions in %llums, %4.4f instructions/second, %4.6f clocks/instruction, average ilen %4.6f bytes\n",
icount, (end - start) * 1000 / CLOCKS_PER_SEC, icount / ((double)(end - start) / CLOCKS_PER_SEC), itotal / (double)icount, tilen / (double)ticount);
}
}
void
handle_shemu(
PDISASM_OPTIONS Options
)
{
SHEMU_CONTEXT ctx;
SHEMU_STATUS shstatus;
char *fileName;
size_t rip = 0, fsize = Options->Size, offset = 0, decFileNameLength = 0, shellSize;
char *fNameDecoded;
PBYTE buffer = Options->Buffer;
memset(&ctx, 0, sizeof(ctx));
rip = Options->Rip;
fileName = Options->FileName;
if (fileName == NULL)
{
fNameDecoded = "hex_string_decoded.bin";
}
else
{
decFileNameLength = strlen(fileName) + sizeof("_decoded.bin");
fNameDecoded = malloc(sizeof(char) * decFileNameLength);
// This is safe, we allocated enough space.
sprintf(fNameDecoded, "%s_decoded.bin", fileName);
}
if (Options->Offset < PAGE_SIZE)
{
offset = Options->Offset;
}
// A little extra space, since shellcodes tend to do accesses after their code...
shellSize = fsize + 0x100;
// Allocate the shellcode, stack, shell bitmap and stack bitmaps.
ctx.Shellcode = malloc(shellSize);
#define STACK_SIZE 0x2000ull
ctx.Stack = malloc(STACK_SIZE);
ctx.Intbuf = malloc(shellSize + STACK_SIZE);
memset(ctx.Shellcode, 0, shellSize);
memset(ctx.Stack, 0, STACK_SIZE);
memcpy(ctx.Shellcode, buffer, fsize);
memset(ctx.Intbuf, 0, shellSize + STACK_SIZE);
// Use the provided RIP, if any. Otherwise, use a hard-coded value.
ctx.ShellcodeBase = (rip != 0 ? rip & PAGE_MASK : 0x200000);
ctx.ShellcodeSize = shellSize;
ctx.StackBase = (ctx.ShellcodeBase & PAGE_MASK) - STACK_SIZE - 0x1000;
ctx.StackSize = STACK_SIZE;
ctx.IntbufSize = shellSize + STACK_SIZE;
ctx.ArchType = SHEMU_ARCH_TYPE_X86;
ctx.Arch.X86.Mode = Options->Mode;
ctx.Arch.X86.Ring = Options->Ring;
ctx.Arch.X86.Registers.RegFlags = NDR_RFLAG_IF | 2;
ctx.Arch.X86.Registers.RegRip = ctx.ShellcodeBase + offset;
ctx.Arch.X86.Registers.RegRsp = ctx.StackBase + STACK_SIZE / 2;
if (ctx.Arch.X86.Mode == ND_CODE_64)
{
ctx.Arch.X86.Segments.Cs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x33 : 0x10;
ctx.Arch.X86.Segments.Ds.Selector = (ctx.Arch.X86.Ring == 3) ? 0x2b : 0x18;
ctx.Arch.X86.Segments.Es.Selector = (ctx.Arch.X86.Ring == 3) ? 0x2b : 0x18;
ctx.Arch.X86.Segments.Ss.Selector = (ctx.Arch.X86.Ring == 3) ? 0x2b : 0x18;
ctx.Arch.X86.Segments.Fs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x2b : 0x00;
ctx.Arch.X86.Segments.Gs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x53 : 0x00;
ctx.Arch.X86.Segments.Fs.Base = 0;
ctx.Arch.X86.Segments.Gs.Base = 0x7FFF0000;
}
else
{
ctx.Arch.X86.Segments.Cs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x1b : 0x08;
ctx.Arch.X86.Segments.Ds.Selector = (ctx.Arch.X86.Ring == 3) ? 0x23 : 0x10;
ctx.Arch.X86.Segments.Es.Selector = (ctx.Arch.X86.Ring == 3) ? 0x23 : 0x10;
ctx.Arch.X86.Segments.Ss.Selector = (ctx.Arch.X86.Ring == 3) ? 0x23 : 0x10;
ctx.Arch.X86.Segments.Fs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x3b : 0x30;
ctx.Arch.X86.Segments.Gs.Selector = (ctx.Arch.X86.Ring == 3) ? 0x23 : 0x00;
ctx.Arch.X86.Segments.Fs.Base = 0x7FFF0000;
ctx.Arch.X86.Segments.Gs.Base = 0;
}
// Dummy values, to resemble regular CR0/CR4 values.
ctx.Arch.X86.Registers.RegCr0 = 0x0000000080050031;
ctx.Arch.X86.Registers.RegCr4 = 0x0000000000170678;
if (Options->UseShemuRegs)
{
// Copy the new GPRs
memcpy(&ctx.Arch.X86.Registers.RegRax, Options->ShemuRegs, sizeof(Options->ShemuRegs));
// Update the stack to point to the new RSP, if one exists
if (ctx.Arch.X86.Registers.RegRsp != 0)
{
// Consider the stack base at least with a page before the current RSP. In case of pushes or operations
// which decrease the RSP, we will always give SHEMU_ABORT_RIP_OUTSIDE otherwise.
ctx.StackBase = ctx.Arch.X86.Registers.RegRsp - 0x1000;
}
}
ctx.TibBase = 0x7FFF0000;
ctx.MaxInstructionsCount = 10000;
ctx.Flags = 0;
ctx.Options = SHEMU_OPT_TRACE_EMULATION | SHEMU_OPT_TRACE_MEMORY | SHEMU_OPT_TRACE_STRINGS | SHEMU_OPT_TRACE_LOOPS;
ctx.Log = &ShemuLog;
ctx.AccessMemory = (ShemuMemAccess)&ShemuAccessMem;
ctx.AccessShellcode = (ShemuMemAccess)&ShemuAccessShellcode;
// Configurable thresholds.
ctx.NopThreshold = SHEMU_DEFAULT_NOP_THRESHOLD;
ctx.StrThreshold = SHEMU_DEFAULT_STR_THRESHOLD;
ctx.MemThreshold = SHEMU_DEFAULT_MEM_THRESHOLD;
// Check for AES support.
int regs[4] = { 0 };
#if defined(ND_ARCH_X86) || defined(ND_ARCH_X64)
cpuid(regs, 1);
#endif
// CPUID leaf function 1, register ECX, bit 25 indicates AES-NI support.
if (!!(regs[2] & (1UL << 25)))
{
ctx.Options |= SHEMU_OPT_SUPPORT_AES;
}
if (Options->BypassSelfWrites)
{
ctx.Options |= SHEMU_OPT_BYPASS_SELF_WRITES;
}
ctx.Options |= SHEMU_OPT_SUPPORT_APX;
shstatus = ShemuX86Emulate(&ctx);
// Print each set flag after emulation.
printf("Emulation terminated with status 0x%08x, flags: 0x%llx, %llu NOPs, %llu NULLs, %llu total instructions, %llu unique instructions\n",
shstatus, (unsigned long long)ctx.Flags, ctx.NopCount, ctx.NullCount, ctx.InstructionsCount, ctx.UniqueCount);
struct
{
ND_UINT64 Flag;
const char* Name;
} const shemuFlags[] = {
#define FLAGENTRY(f) { .Flag = f, .Name = #f }
FLAGENTRY(SHEMU_FLAG_NOP_SLED),
FLAGENTRY(SHEMU_FLAG_LOAD_RIP),
FLAGENTRY(SHEMU_FLAG_WRITE_SELF),
FLAGENTRY(SHEMU_FLAG_TIB_ACCESS_PEB),
FLAGENTRY(SHEMU_FLAG_SYSCALL),
FLAGENTRY(SHEMU_FLAG_STACK_STR),
FLAGENTRY(SHEMU_FLAG_TIB_ACCESS_WOW32),
FLAGENTRY(SHEMU_FLAG_HEAVENS_GATE),
FLAGENTRY(SHEMU_FLAG_STACK_PIVOT),
FLAGENTRY(SHEMU_FLAG_SUD_ACCESS),
FLAGENTRY(SHEMU_FLAG_KPCR_ACCESS),
FLAGENTRY(SHEMU_FLAG_SWAPGS),
FLAGENTRY(SHEMU_FLAG_SYSCALL_MSR_READ),
FLAGENTRY(SHEMU_FLAG_SYSCALL_MSR_WRITE),
FLAGENTRY(SHEMU_FLAG_SIDT),
#undef FLAGENTRY
};
for (uint32_t fli = 0; fli < ARRAYSIZE(shemuFlags); fli++)
{
if (ctx.Flags & shemuFlags[fli].Flag)
{
printf(" %s\n", shemuFlags[fli].Name);
}
}
if (fNameDecoded != NULL)
{
size_t outSize;
FILE *file = fopen(fNameDecoded, "wb");
if (file == NULL)
{
printf("Could not create the file %s\n", fNameDecoded);
goto cleanup_and_exit;
}
outSize = fwrite(ctx.Shellcode, 1, fsize, file);
if (outSize == 0)
{
printf("No bytes written to %s!\n", fNameDecoded);
}
fclose(file);
}
cleanup_and_exit:
if (NULL != fileName && NULL != fNameDecoded)
{
free(fNameDecoded);
}
if (NULL != ctx.Shellcode)
{
free(ctx.Shellcode);
}
if (NULL != ctx.Stack)
{
free(ctx.Stack);
}
if (NULL != ctx.Intbuf)
{
free(ctx.Intbuf);
}
}
void print_help(void)
{
uint32_t major, minor, revision;
char *date, *time;
NdGetVersion(&major, &minor, &revision, &date, &time);
printf("bddisasm version %u.%u.%u, built on %s %s\n", major, minor, revision, date, time);
printf("\n");
printf("IMPORTANT:\n");
printf(" This tool is only meant to exemplify bddisasm integration.\n");
printf("\n");
printf("USAGE:\n");
printf(" disasm COMMAND INPUT MODE [OPTIONS]\n");
printf("\n");
printf("COMMAND can be one of:\n");
printf(" decode - Will decode the input, and print each instruction (default).\n");
printf(" shemu - Will run the shellcode-emulator on the input, and print the emulation trace.\n");
printf("\n");
printf("INPUT is mandatory and can be one of:\n");
printf(" -f file - Specify input `file` name.\n");
printf(" -h hex - Specify input `hex` string. Accepted formats are:\n");
printf(" Plain hex string; example: 33C090CCC3\n");
printf(" Escaped hex string; example: \\x33\\xC0\\x90\\xCC\\xC3\n");
printf("\n");
printf("MODE sets the decode mode:\n");
printf(" -b16 - Decode in 16-bit mode.\n");
printf(" -b32 - Decode in 32-bit mode.\n");
printf(" -b64 - Decode in 64-bit mode (default).\n");
printf("\n");
printf("OPTIONS which are common among different modes:\n");
printf(" -o offset - Start processing from the indicated `offset` (default is 0).\n");
printf(" -r rip - Use the indicated `rip` for disassembly (default is 0).\n");
printf(" -v vendor - Set prefered vendor (default is any). The following are valid `vendor` values:\n");
printf(" intel, amd, any\n");
printf(" -t feature - Set prefered feature mode (default is all). The following are valid `feature` values (multiple can be used):\n");
printf(" none, all, mpx, cet, cldm, piti\n");
printf("\n");
printf("OPTIONS valid only with decode command:\n");
printf(" -hl - Highlight instruction parts. The colors used are:\n");
set_bold_fg_color(FG_White);
printf(" light white prefixes\n");
set_bold_fg_color(FG_Green);
printf(" light green opcodes\n");
set_bold_fg_color(FG_Yellow);
printf(" light yellow modrm and sib\n");
set_bold_fg_color(FG_Blue);
printf(" light blue displacement\n");
set_bold_fg_color(FG_Red);
printf(" light red relative offset, immediate, address\n");
reset_fg_color();
printf(" -nv - Don't print disassembly. Use this only for performance tests.\n");
printf(" -iv - Print performance statistics.\n");
printf(" -exi - Print extended info about instructions.\n");
printf(" -bits - Print the instruction bit fields.\n");
printf(" -skip16 - Skip 16 bytes after each decoded instruction. Useful when decoding invalid instructions.\n");
printf(" -skip1 - Skip a single byte after each decoded instruction. Useful when decoding every possible offset.\n");
printf("\n");
printf("OPTIONS valid only with shemu command:\n");
printf(" -reg val - Set register `reg` to value `val` for emulation. `reg` must be the plain 64-bit register name (ie: rax).\n");
printf(" -k - Specify kernel mode for shemu emulation (default is user-mode).\n");
printf(" -bw - Bypass self-modifications in shemu.\n");
printf("\n");
printf("\n");
printf("EXAMPLES:\n");
printf(" Decode 64-bit code from file test.bin:\n");
printf(" disasm -f test.bin\n");
printf(" disasm -b64 -f test.bin\n");
printf(" disasm decode -b64 -f test.bin\n");
printf(" Decode 64-bit from a hex-buffer, and display extended instruction information:\n");
printf(" disasm -b64 -h 909033C0 -exi\n");
printf(" Decode from hex-string, highlight instruction components & display instruction bitfields:\n");
printf(" disasm -h 90505833C0E80000000058CC -hl -bits\n");
printf(" Emulate a potential 32-bit shellcode from test file shell.bin:\n");
printf(" disasm shemu -b32 -f shell.bin\n");
printf(" Emulate a potential 32-bit shellcode from test file shell.bin, and specify some input registers:\n");
printf(" disasm shemu -b32 -f shell.bin -rax 0x100 -rcx 0xABCD -rsp 0x1000\n");
printf(" Run a quick benchmark on file test.bin:\n");
printf(" disasm -f test.bin -nv -iv\n");
printf("\n");
}
void
cleanup_context(
_Inout_ DISASM_OPTIONS *Options
)
{
if (Options->InputMode == inputFile)
{
if (NULL != Options->Buffer)
{
free(Options->Buffer);
}
}
}
void *read_file(const char *Path, size_t *Size)
{
void *buffer;
FILE *fd = fopen(Path, "rb");
if (fd == NULL)
{
printf("fopen failed for \"%s\"\n", Path);
return NULL;
}
fseek(fd, 0ull, SEEK_END);
*Size = ftell(fd);
rewind(fd);
buffer = malloc(*Size);
if (buffer != NULL)
{
size_t readCount = fread(buffer, 1, *Size, fd);
if (readCount != *Size)
{
printf("Only %zx bytes were read! Expected %zx\n", readCount, *Size);
*Size = readCount;
}
}
fclose(fd);
return buffer;
}
_Success_(return)
bool
parse_input(
_Inout_ DISASM_OPTIONS* Options
)
{
static BYTE hexbuf[4096];
if (inputNone == Options->InputMode)
{
printf("Expecting an input mode: either -f or -h!\n");
return false;
}
if (inputFile == Options->InputMode)
{
Options->Buffer = read_file(Options->FileName, &Options->Size);
if (Options->Buffer == NULL)
{
printf("Couldn't read '%s'\n", Options->FileName);
cleanup_context(Options);
return false;
}
if (Options->Size == 0)
{
printf("The input file '%s' is empty\n", Options->FileName);
cleanup_context(Options);
return false;
}
}
else
{
DWORD idx = 0;
Options->Size = strlen(Options->FileName);
if (Options->Size < 2)
{
printf("Min 1-byte buffer needed!\n");
return false;
}
// Extract each byte from the provided hex input.
for (size_t bidx = 0; bidx < Options->Size - 1; )
{
// '\x'
if (Options->FileName[bidx] == '\\' && Options->FileName[bidx + 1] == 'x')
{
bidx += 2;
continue;
}
// '0x'
if (Options->FileName[bidx] == '0' && Options->FileName[bidx + 1] == 'x')
{
bidx += 2;
continue;
}
// '0x'
if (Options->FileName[bidx] == '0' && Options->FileName[bidx + 1] == 'X')
{
bidx += 2;
continue;
}
// ' '
// '0x'
if (Options->FileName[bidx] == ' ')
{
bidx += 1;
continue;
}
if (is_hex_digit(Options->FileName[bidx]) &&
is_hex_digit(Options->FileName[bidx + 1]))
{
hexbuf[idx++] = ((hex_to_bin(Options->FileName[bidx]) << 4) |
(hex_to_bin(Options->FileName[bidx + 1]))) & 0xFF;
bidx += 2;
continue;
}
printf("Unexpected hex-character encountered: %c!\n", Options->FileName[bidx]);
return false;
}
Options->FileName = NULL;
Options->Size = idx;
Options->Buffer = hexbuf;
}
// Make sure the offset is valid & points within the buffer.
if (Options->Offset >= Options->Size)
{
printf("The offset exceeds the buffer size!\n");
cleanup_context(Options);
return false;
}
return true;
}
_Success_(return)
bool
parse_arguments(
_In_ int argc,
_In_ char* argv[],
_Out_ DISASM_OPTIONS *Options
)
{
int i;
if (argc < 2 || NULL == argv)
{
print_help();
return false;
}
memset(Options, 0, sizeof(*Options));
// Initialize default options.
Options->Command = commandDecode;
Options->Mode = ND_CODE_64;
Options->Ring = 3;
Options->Print = true;
Options->Vendor = ND_VEND_ANY;
Options->Feature = ND_FEAT_ALL;
i = 1;
while (i < argc)
{
DWORD gprIdx;
if (match_gpr(argv[i], &gprIdx))
{
// Register value (used by shemu).
if (i + 1 >= argc)
{
printf("No value given for %s!\n", argv[i]);
}
else
{
Options->ShemuRegs[gprIdx] = (size_t)strtoull(argv[i + 1], NULL, 0);
Options->UseShemuRegs = true;
i++;
}
}
else if (strcmp(argv[i], "shemu") == 0)
{
// shemu command - will emulate.
Options->Command = commandShemu;
}
else if (argv[i][0] == '-' && argv[i][1] == 'f' && argv[i][2] == 0)
{
// File input mode.
if (i + 1 < argc)
{
Options->InputMode = inputFile;
Options->FileName = argv[i + 1];
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'h' && argv[i][2] == 0)
{
// Hex-string input mode.
if (i + 1 < argc)
{
Options->InputMode = inputHex;
Options->FileName = argv[i + 1];
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'o' && argv[i][2] == 0)
{
// Offset inside the provided buffer.
if (i + 1 < argc)
{
Options->Offset = (size_t)strtoull(argv[i + 1], NULL, 0);
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'r' && argv[i][2] == 0)
{
// Rip. Can be any value, as it's used only for disassembly.
if (i + 1 < argc)
{
Options->Rip = (size_t)strtoull(argv[i + 1], NULL, 0);
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'k' && argv[i][2] == 0)
{
// Kernel-mode for shemu.
Options->Ring = 0;
}
else if (argv[i][0] == '-' && argv[i][1] == 'b' && argv[i][2] == 'w' && argv[i][3] == 0)
{
// Bypass self writes in shemu.
Options->BypassSelfWrites = true;
}
else if (0 == strcmp(argv[i], "-b16"))
{
// 16-bit mode.
Options->Mode = ND_CODE_16;
}
else if (0 == strcmp(argv[i], "-b32"))
{
// 32-bit mode.
Options->Mode = ND_CODE_32;
}
else if (0 == strcmp(argv[i], "-b64"))
{
// 64-bit mode.
Options->Mode = ND_CODE_64;
}
else if (0 == strcmp(argv[i], "-v intel"))
{
// Prefer Intel instructions.
Options->Vendor = ND_VEND_INTEL;
}
else if (0 == strcmp(argv[i], "-v amd"))
{
// Prefer AMD instructions.
Options->Vendor = ND_VEND_AMD;
}
else if (0 == strcmp(argv[i], "-v any"))
{
// Try to decode everything.
Options->Vendor = ND_VEND_ANY;
}
else if (0 == strcmp(argv[i], "-t all"))
{
// Enable all features.
Options->Feature = ND_FEAT_ALL;
}
else if (0 == strcmp(argv[i], "-t mpx"))
{
// Enable MPX.
if (Options->Feature == ND_FEAT_ALL)
{
Options->Feature = 0;
}
Options->Feature |= ND_FEAT_MPX;
}
else if (0 == strcmp(argv[i], "-t cet"))
{
// Enable CET.
if (Options->Feature == ND_FEAT_ALL)
{
Options->Feature = 0;
}
Options->Feature |= ND_FEAT_CET;
}
else if (0 == strcmp(argv[i], "-t cldm"))
{
// Enable Cache Line Demote.
if (Options->Feature == ND_FEAT_ALL)
{
Options->Feature = 0;
}
Options->Feature |= ND_FEAT_CLDEMOTE;
}
else if (0 == strcmp(argv[i], "-t piti"))
{
// Enable Prefetch for instruction fetch.
if (Options->Feature == ND_FEAT_ALL)
{
Options->Feature = 0;
}
Options->Feature |= ND_FEAT_PITI;
}
else if (0 == strcmp(argv[i], "-t none"))
{
// No feature support.
Options->Feature = ND_FEAT_NONE;
}
else if (0 == strcmp(argv[i], "-nv"))
{
// Do not print anything.
Options->Print = false;
}
else if (0 == strcmp(argv[i], "-hl"))
{
// Highlight instruction components.
Options->Highlight = true;
}
else if (0 == strcmp(argv[i], "-iv"))
{
// Print statistics.
Options->Stats = true;
}
else if (0 == strcmp(argv[i], "-exi"))
{
// Print extended instruction information.
Options->ExtendedInfo = true;
}
else if (0 == strcmp(argv[i], "-bits"))
{
// Print instruction bitfields.
Options->BitFields = true;
}
else if (0 == strcmp(argv[i], "-skip16"))
{
// Skip 16 bytes after each decoded instruction.
Options->Skip16 = true;
}
else if (0 == strcmp(argv[i], "-skip1"))
{
// Skip a single byte after each decoded instruction.
Options->Skip1 = true;
}
else
{
printf("Unknown option: '%s'\n", argv[i]);
}
i++;
}
// Parse the input.
if (!parse_input(Options))
{
printf("Could not find a valid input!\n");
return false;
}
return true;
}
int
main(
_In_ int argc,
_In_ char* argv[]
)
{
DISASM_OPTIONS options = { 0 };
// Parse arguments & extract relevant options.
if (!parse_arguments(argc, argv, &options))
{
return -1;
}
// Handle the indicated command.
if (options.Command == commandShemu)
{
handle_shemu(&options);
}
else
{
handle_disasm(&options);
}
// Will free any memory allocated during argument parsing, and will close any handles.
cleanup_context(&options);
return 0;
}
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