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bddisasm/disasmtool/disasmtool.c

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Initial commit.
2020-07-21 08:19:18 +00:00
/*
* Copyright (c) 2020 Bitdefender
* SPDX-License-Identifier: Apache-2.0
*/
#include <Windows.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
typedef uint64_t QWORD, *PQWORD;
// Main disasm header file.
#include "bdshemu\bdshemu.h"
#include "bddisasm.h"
#define PAGE_SIZE 0x1000
#define PAGE_MASK 0xFFFFFFFFFFFFF000
typedef struct _DISASM_OPTIONS
{
uint8_t *Buffer; // The buffer containing the instructions.
size_t Size; // Buffer size.
size_t Offset; // Offset inside the buffer.
size_t Rip; // Virtual RIP.
char *Target; // If in search mode, this indicates the instruction to be searched for.
BOOLEAN Highlight; // Highlight instruction components, if true.
BOOLEAN ExtendedInfo; // Display extended instruction info, if true.
BOOLEAN Stats; // Display disassembly stats (clocks / instruction, instructions / second), if true.
BOOLEAN Search; // Search for the Target instruction in the provided buffer.
BOOLEAN Print; // Print instruction disassembly, if true.
uint8_t Mode; // Mode - 16, 32 or 64 bit mode.
uint8_t Ring; // Ring - 0, 1, 2 or 3.
uint8_t Vendor; // Proffered vendor.
char *FileName; // Input file, if any.
size_t ShemuRegs[REG_R15 + 1];
BOOLEAN UseShemuRegs;
} DISASM_OPTIONS, *PDISASM_OPTIONS;
char *gSpaces[16] =
{
"",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
};
//
// 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);
}
void* nd_memset(void *s, int c, size_t n)
{
return memset(s, c, n);
}
//
// set_to_string
//
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_AMD: return "AMD";
case ND_SET_AMXBF16: return "AMX-BF16";
case ND_SET_AMXINT8: return "AMX-INT8";
case ND_SET_AMXTILE: return "AMX-TILE";
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_BMI1: return "BMI1";
case ND_SET_BMI2: return "BMI2";
Use the documented byte granularity for cache-line accesses. Fixed CET CPUID feature flag - split into CET_SS and CET_IBT.
2020-07-21 21:47:46 +00:00
case ND_SET_CET_SS: return "CET_SS";
case ND_SET_CET_IBT: return "CET_IBT";
Initial commit.
2020-07-21 08:19:18 +00:00
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_CMPXCHG16B: return "CMPXCHG16B";
case ND_SET_CYRIX: return "CYRIX";
case ND_SET_CYRIX_SMM: return "CYRIX_SMM";
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_FXSAVE: return "FXSAVE";
case ND_SET_GFNI: return "GFNI";
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_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_MWAITT: return "MWAITT";
case ND_SET_PAUSE: return "PAUSE";
case ND_SET_PCLMULQDQ: return "PCLMULQDQ";
case ND_SET_PCOMMIT: return "PCOMMIT";
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_PREFETCH_NOP: return "PREFETCH_NOP";
case ND_SET_PTWRITE: return "PTWRITE";
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_SCC: return "SCC";
case ND_SET_SERIALIZE: return "SERIALIZE";
case ND_SET_SGX: return "SGX";
case ND_SET_SHA: return "SHA";
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_TSX: return "TSX";
case ND_SET_TSXLDTRK: return "TSXLDTRK";
case ND_SET_UD: return "UD";
case ND_SET_UNKNOWN: return "UNKNOWN";
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_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 "???";
}
}
//
// category_to_string
//
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_ARITH: return "ARITH";
case ND_CAT_AMX: return "AMX";
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_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_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_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_KMASK: return "KMASK";
case ND_CAT_KNL: return "KNL";
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_PADLOCK: return "PADLOCK";
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_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_SHIFT: return "SHIFT";
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_UD: return "UD";
case ND_CAT_UNCOND_BR: return "UNCOND_BR";
case ND_CAT_UNKNOWN: return "UNKNOWN";
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_X87_ALU: return "X87_ALU";
case ND_CAT_XOP: return "XOP";
case ND_CAT_XSAVE: return "XSAVE";
default: return "???";
}
}
//
// optype_to_string
//
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_OFFS: return "Offset";
case ND_OP_BANK: return "Bank";
default: return "???";
}
}
//
// regtype_to_string
//
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";
default: return "???";
}
}
//
// encoding_to_string
//
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 "";
}
}
//
// tuple_to_string
//
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";
}
}
//
// exception_to_string
//
const char *exception_evex_to_string(
__in ND_EX_TYPE_EVEX ExClass
)
{
switch (ExClass)
{
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";
default: return "None";
}
}
//
// hex_to_bin
//
BYTE hex_to_bin(
__in char HexByte
)
{
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;
}
//
// str_strip
// Copies the InputString in OutputString, while eliminating the characters specified in Tokens
//
VOID str_strip(
__in char* InString,
__in DWORD LenInString,
__in char* Tokens,
__in DWORD LenTokString,
__out char* OutString,
__in DWORD CapOutString // capacity of out string including null character
)
{
DWORD lenInStr, lenOutStr, lenTokStr;
DWORD itInStr = 0, itTokStr = 0;
lenTokStr = 0;
lenOutStr = 0;
if ((NULL == InString) || (NULL == Tokens) || (NULL == OutString))
{
return;
}
lenInStr = (DWORD)strnlen_s(InString, ND_MIN_BUF_SIZE);
lenTokStr = (DWORD)strnlen_s(Tokens, ND_MIN_BUF_SIZE);
lenInStr = (lenInStr > LenInString) ? LenInString : lenInStr;
lenTokStr = (lenTokStr > LenTokString) ? LenTokString : lenTokStr;
if ((0 == lenInStr) || (0 == lenTokStr))
{
return;
}
for (itInStr = 0; itInStr < lenInStr; itInStr++)
{
BOOLEAN found = FALSE;
for (itTokStr = 0; itTokStr < lenTokStr; itTokStr++)
{
if (InString[itInStr] == Tokens[itTokStr])
{
found = TRUE;
break;
}
}
if (!found)
{
// not enough space, bail out
if (lenOutStr >= CapOutString - 1)
{
return;
}
OutString[lenOutStr] = InString[itInStr];
lenOutStr++;
}
}
}
//
// regstr_to_idx
//
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 < ARRAYSIZE(reg64); i++)
{
if (!_stricmp(Reg, reg64[i]))
{
return i;
}
}
return -1;
}
//
// match_gpr
//
BOOLEAN
match_gpr(
__in const char* Arg,
__in DWORD* Index
)
{
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;
}
//
// print_instruction
//
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("%p ", (void*)(Rip));
if (Options->Highlight)
{
// Display prefixes.
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY);
for (idx = 0; idx < Instrux->PrefLength; idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
// Display opcodes.
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_GREEN | FOREGROUND_INTENSITY);
for (idx = 0; idx < (DWORD)(ND_IS_3DNOW(Instrux) ? Instrux->OpLength - 1 : Instrux->OpLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
// Display modrm and sib.
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY);
for (idx = 0; idx < (DWORD)(Instrux->HasModRm + Instrux->HasSib); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
// Display displacement.
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_INTENSITY);
for (idx = 0; idx < (DWORD)(Instrux->DispLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
// Display relative offset/moffset/immediates.
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_RED | FOREGROUND_INTENSITY);
for (idx = 0; idx < (DWORD)(Instrux->Imm1Length + Instrux->Imm2Length +
Instrux->RelOffsLength + Instrux->MoffsetLength +
Instrux->HasSseImm + Instrux->AddrLength); idx++, k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
if (ND_IS_3DNOW(Instrux))
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_GREEN | FOREGROUND_INTENSITY);
for (; k < Instrux->Length; k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);
}
}
for (; k < Instrux->Length; k++)
{
printf("%02x", Instrux->InstructionBytes[k]);
}
printf("%s", gSpaces[16 - Instrux->Length]);
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: %d\n", regs[Instrux->CpuidFlag.Reg], Instrux->CpuidFlag.Bit);
}
if (Instrux->HasEvex)
{
printf(" EVEX Tuple Type: %s\n",
tuple_to_string(Instrux->TupleType));
}
if (Instrux->ExceptionClass != ND_EXC_None)
{
printf(" Exception class: %s, ",
Instrux->ExceptionClass == ND_EXC_SSE_AVX ? "SSE/VEX" :
Instrux->ExceptionClass == ND_EXC_EVEX ? "EVEX" :
Instrux->ExceptionClass == ND_EXC_OPMASK ? "Opmask" :
Instrux->ExceptionClass == ND_EXC_AMX ? "AMX" : "???");
switch (Instrux->ExceptionClass)
{
case ND_EXC_SSE_AVX:
printf("exception type: %d\n", Instrux->ExceptionType);
break;
case ND_EXC_EVEX:
printf("exception type: %s\n", exception_evex_to_string(Instrux->ExceptionType));
break;
case ND_EXC_OPMASK:
printf("exception type: K%d\n", Instrux->ExceptionType + 19);
break;
case ND_EXC_AMX:
printf("exception type: AMX-E%d\n", Instrux->ExceptionType);
break;
default:
printf("exception type: ???\n");
break;
}
}
if (Instrux->FlagsAccess.RegAccess != 0)
{
DWORD fidx, all;
BOOLEAN 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: %s, SGX: %s, TSX: %s, VMXRoot: %s, VMXNonRoot: %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.Sgx ? "yes" : "no",
Instrux->ValidModes.Tsx ? "yes" : "no",
Instrux->ValidModes.VmxRoot ? "yes" : "no",
Instrux->ValidModes.VmxNonRoot ? "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: %d, Acc: %s, Type: %10s, Size: %2d, RawSize: %2d, Encoding: %s", i,
Added dedicated Prefetch operand access type. Internally, store the access type sepparately than the flags. Dump conditional operand accesses with exi option too.
2020-07-25 14:16:35 +00:00
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" : "--",
Initial commit.
2020-07-21 08:19:18 +00:00
optype_to_string(Instrux->Operands[i].Type), Instrux->Operands[i].Size,
Instrux->Operands[i].RawSize, 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)
{
Added the Shadow Stack Pointer operand to the SYSCALL and SYSEXIT instructions. Moved the CET test cases in dedicated folders. Improved shadow-stack operand reporting - a distinction can be made between push/pop shadow stack accesses, and other shadow stack accesses. A new field is now present in the memory information - the shadow stack access type, which indicates: explicit access, implicit via SSP, implicit push/pop via SSP or implicit via IA32_PL0_SSP.
2020-07-21 19:29:59 +00:00
printf("Shadow stack: %d, ", Instrux->Operands[i].Info.Memory.ShStkType);
Initial commit.
2020-07-21 08:19:18 +00:00
}
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, ", 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: %2d, RegId: %d, RegCount: %d\n",
regtype_to_string(Instrux->Operands[i].Info.Register.Type),
Instrux->Operands[i].Info.Register.Size,
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].Decorator.Broadcast.Size,
Instrux->Operands[i].Decorator.Broadcast.Count);
}
if (Instrux->Operands[i].Decorator.HasMask)
{
printf(" Decorator: Mask k%d\n", Instrux->Operands[i].Decorator.Mask.Msk);
}
if (Instrux->Operands[i].Decorator.HasZero)
{
printf(" Decorator: Zero (no merging)\n");
}
}
printf("\n");
}
}
//
// handle_search
//
void
handle_search(
__in PDISASM_OPTIONS Options
)
{
NDSTATUS status;
INSTRUX instrux;
SIZE_T rip = 0, i;
char text[ND_MIN_BUF_SIZE], target[ND_MIN_BUF_SIZE];
char *token1, *token2, *ctx1, *ctx2;
BOOLEAN match;
// Disassemble
rip = 0;
while (rip < Options->Size)
{
status = NdDecodeEx2(&instrux, Options->Buffer + rip, Options->Size - rip, Options->Mode,
Options->Mode, Options->Mode, ND_VEND_ANY);
if (!ND_SUCCESS(status))
{
goto _continue;
}
NdToText(&instrux, rip, ND_MIN_BUF_SIZE, text);
// Copy the target.
memcpy(target, Options->Target, ND_MIN_BUF_SIZE);
for (i = 0; i < ND_MIN_BUF_SIZE; i++)
{
if (target[i] == ',')
{
target[i] = ' ';
}
if (text[i] == ',')
{
text[i] = ' ';
}
}
_strlwr_s(target, ND_MIN_BUF_SIZE);
_strlwr_s(text, ND_MIN_BUF_SIZE);
// Try to match.
token1 = strtok_s(target, " ", &ctx1);
token2 = strtok_s(text, " ", &ctx2);
match = TRUE;
while (token1 && token2)
{
if (0 == strcmp(token1, "*"))
{
goto _continue_match;
}
if (strlen(token1) != strlen(token2))
{
match = FALSE;
break;
}
for (i = 0; i < strlen(token1); i++)
{
if ((token1[i] != '?') && (token1[i] != token2[i]))
{
match = FALSE;
break;
}
}
if (!match)
{
break;
}
_continue_match:
token1 = strtok_s(NULL, " ", &ctx1);
token2 = strtok_s(NULL, " ", &ctx2);
}
// Unfinished token - leave.
if (token1 || token2)
{
goto _continue;
}
if (match)
{
SIZE_T rip2 = rip, count = 0;
print_instruction(rip, &instrux, Options);
rip2 += instrux.Length;
while (rip2 < Options->Size && count++ < 8)
{
status = NdDecodeEx2(&instrux, Options->Buffer + rip2, Options->Size - rip2, Options->Mode,
Options->Mode, Options->Mode, ND_VEND_ANY);
if (!ND_SUCCESS(status))
{
printf("%p ERROR\n", (void*)rip2);
rip2++;
}
else
{
print_instruction(rip2, &instrux, Options);
rip2 += instrux.Length;
}
}
printf("-----------------------------------------------------------------------\n");
}
_continue:
rip++;
}
}
//
// handle_disasm
//
void
handle_disasm(
__in PDISASM_OPTIONS Options
)
{
NDSTATUS status;
INSTRUX instrux;
QWORD icount = 0, istart = 0, iend = 0, start = 0, end = 0, itotal = 0;
SIZE_T rip = 0, fsize = Options->Size;
PBYTE buffer = Options->Buffer;
BYTE mode = Options->Mode, vend = Options->Vendor;
start = clock();
// Disassemble
rip = Options->Offset;
while (rip < Options->Size)
{
icount++;
istart = __rdtsc();
status = NdDecodeEx2(&instrux, buffer + rip, fsize - rip, mode, mode, mode, vend);
iend = __rdtsc();
itotal += iend - istart;
if (!ND_SUCCESS(status))
{
if (Options->Print)
{
printf("%p ", (void*)(rip + Options->Rip));
printf("%02x", buffer[rip]);
printf("%s", gSpaces[16 - 1]);
printf("db 0x%02x (0x%08x)\n", buffer[rip], status);
}
rip++;
}
else
{
if (Options->Print)
{
print_instruction(rip + Options->Rip, &instrux, Options);
}
rip += instrux.Length;
}
}
end = clock();
if (Options->Stats)
{
printf("Disassembled %lld instructions in %lldms, %4.4f instructions/second, %4.6f clocks/instruction\n",
icount, end - start, icount / (double)(end - start) * 1000, itotal / (double)icount);
}
}
//
// set_shemuctx_file
//
void set_shemuctx_file(
__in const char *FileName,
__in DISASM_OPTIONS *Options
)
{
HANDLE hFile;
DWORD fileSize;
BOOL readFileSuccess;
PCHAR fileBuf = NULL;
DWORD bytesRead;
PCHAR lineStart, lineToken, ctx, lineBufCtx;
char lineBuf[ND_MIN_BUF_SIZE] = { 0 };
INT32 regIdx;
QWORD regVal;
// pre-init
hFile = INVALID_HANDLE_VALUE;
fileSize = 0;
regIdx = 0;
regVal = 0;
ctx = lineBufCtx = NULL;
if ((NULL == FileName) || (NULL == Options))
{
goto cleanup_and_exit;
}
hFile = CreateFileA(FileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
goto cleanup_and_exit;
}
fileSize = GetFileSize(hFile, NULL);
if (INVALID_FILE_SIZE == fileSize)
{
goto cleanup_and_exit;
}
fileBuf = (PCHAR)VirtualAlloc(NULL, fileSize + 3ull, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (NULL == fileBuf)
{
goto cleanup_and_exit;
}
readFileSuccess = ReadFile(hFile, fileBuf, fileSize, &bytesRead, NULL);
if (!readFileSuccess)
{
printf("ReadFile failed: GLA: %x\n", GetLastError());
goto cleanup_and_exit;
}
lineStart = strtok_s(fileBuf, "\r\n", &ctx);
while (lineStart)
{
char regStr[ND_MIN_BUF_SIZE] = { 0 };
char valStr[ND_MIN_BUF_SIZE] = { 0 };
BOOLEAN isRip = FALSE;
if (0 == strnlen_s(lineStart, ND_MIN_BUF_SIZE))
{
goto next_line;
}
strcpy_s(lineBuf, ND_MIN_BUF_SIZE, lineStart);
lineToken = strtok_s(lineBuf, ":", &lineBufCtx);
if (NULL == lineToken)
{
goto next_line;
}
str_strip(lineToken, (DWORD)strnlen_s(lineToken, ND_MIN_BUF_SIZE), " ,\"",
(DWORD)strnlen_s(" ,\"", ND_MIN_BUF_SIZE), regStr, ND_MIN_BUF_SIZE);
// first element is the register
regIdx = regstr_to_idx(regStr);
if (regIdx < 0 || regIdx >= ARRAYSIZE(Options->ShemuRegs))
{
if (!_stricmp(regStr, "rip"))
{
isRip = TRUE;
}
else
{
printf("Corrupt line: %s\n", lineStart);
goto next_line;
}
}
// second element is the value
lineToken = strtok_s(NULL, ":", &lineBufCtx);
if ((NULL == lineToken))
{
printf("Corrupt line: %s\n", lineStart);
goto next_line;
}
str_strip(lineToken, (DWORD)strnlen_s(lineToken, ND_MIN_BUF_SIZE), " ,\"",
(DWORD)strnlen_s(" ,\"", ND_MIN_BUF_SIZE), valStr, ND_MIN_BUF_SIZE);
regVal = strtoull(valStr, NULL, 0);
if (!isRip)
{
Options->ShemuRegs[regIdx] = (size_t)regVal;
}
else
{
Options->Rip = (size_t)regVal;
}
next_line:
lineStart = strtok_s(NULL, "\r\n", &ctx);
memset(lineBuf, 0, ND_MIN_BUF_SIZE);
}
cleanup_and_exit:
if (INVALID_HANDLE_VALUE != hFile)
{
CloseHandle(hFile);
}
if (NULL != fileBuf)
{
VirtualFree(fileBuf, 0, MEM_RELEASE);
}
}
void ShemuLog(PCHAR data)
{
printf("%s", data);
}
bool ShemuAccessMem(PSHEMU_CONTEXT Ctx, uint64_t Gla, size_t Size, uint8_t *Buffer, 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;
}
//
// handle_shemu
//
void
handle_shemu(
PDISASM_OPTIONS Options
)
{
SHEMU_CONTEXT ctx;
SHEMU_STATUS shstatus;
char *fileName;
HANDLE hFile;
DWORD outSize;
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)
{
decFileNameLength = strlen("hex_string_decoded.bin") + 1;
fNameDecoded = (char *)malloc(sizeof(char) * decFileNameLength);
}
else
{
decFileNameLength = strlen(fileName) + strlen("_decoded.bin") + 1;
fNameDecoded = (char *)malloc(sizeof(char) * decFileNameLength);
}
if (NULL == fNameDecoded)
{
printf("Could not allocate file name.\n");
}
else
{
if (fileName == NULL)
{
sprintf_s(fNameDecoded, decFileNameLength, "hex_string_decoded.bin");
}
else
{
sprintf_s(fNameDecoded, decFileNameLength, "%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);
if (NULL == ctx.Shellcode)
{
printf("Memory error: couldn't allocated %zu bytes!\n", fsize);
free(fNameDecoded);
return;
}
#define STACK_SIZE 0x2000
ctx.Stack = malloc(STACK_SIZE);
if (NULL == ctx.Stack)
{
printf("Memory error: couldn't allocated %zu bytes!\n", fsize);
free(fNameDecoded);
return;
}
ctx.Intbuf = malloc(shellSize + STACK_SIZE);
if (NULL == ctx.Intbuf)
{
printf("Memory error: couldn't allocated %zu bytes!\n", fsize);
free(fNameDecoded);
return;
}
memset(ctx.Shellcode, 0, shellSize);
memset(ctx.Stack, 0, STACK_SIZE);
memcpy((BYTE *)ctx.Shellcode, (BYTE *)buffer, fsize);
memset(ctx.Intbuf, 0, shellSize + STACK_SIZE);
ctx.ShellcodeBase = (rip != 0 ? rip & PAGE_MASK : 0x200000);
ctx.ShellcodeSize = (DWORD)shellSize;
ctx.StackBase = 0x100000;
ctx.StackSize = STACK_SIZE;
ctx.Registers.RegRsp = 0x101000;
ctx.IntbufSize = (DWORD)shellSize + STACK_SIZE;
ctx.Registers.RegFlags = REG_RFLAG_IF | 2;
ctx.Registers.RegRip = ctx.ShellcodeBase + offset;
ctx.Segments.Cs.Selector = 0x10;
ctx.Segments.Ds.Selector = 0x28;
ctx.Segments.Es.Selector = 0x28;
ctx.Segments.Ss.Selector = 0x28;
ctx.Segments.Fs.Selector = 0x30;
ctx.Segments.Fs.Base = 0x7FFF0000;
ctx.Segments.Gs.Selector = 0x30;
ctx.Segments.Gs.Base = 0x7FFF0000;
// Dummy values, to resemble regular CR0/CR4 values.
ctx.Registers.RegCr0 = 0x0000000080050031;
ctx.Registers.RegCr4 = 0x0000000000170678;
ctx.Mode = Options->Mode;
ctx.Ring = Options->Ring;
ctx.TibBase = Options->Mode == ND_CODE_32 ? ctx.Segments.Fs.Base : ctx.Segments.Gs.Base;
ctx.MaxInstructionsCount = 4096;
ctx.Flags = 0;
ctx.Options = SHEMU_OPT_TRACE_EMULATION;
ctx.Log = &ShemuLog;
ctx.AccessMemory = &ShemuAccessMem;
// Configurable thresholds.
ctx.NopThreshold = SHEMU_DEFAULT_NOP_THRESHOLD;
ctx.StrThreshold = SHEMU_DEFAULT_STR_THRESHOLD;
ctx.MemThreshold = SHEMU_DEFAULT_MEM_THRESHOLD;
if (Options->UseShemuRegs)
{
// Copy the new GPRs
memcpy(&ctx.Registers.RegRax, Options->ShemuRegs, sizeof(Options->ShemuRegs));
// Update the stack to point to the new RSP, if one exists
if (ctx.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_BRANCH_OUTSIDE otherwise.
ctx.StackBase = ctx.Registers.RegRsp - 0x1000;
}
}
shstatus = ShemuEmulate(&ctx);
printf("Emulation terminated with status 0x%08x, flags: 0x%llx, %d NOPs\n", shstatus, ctx.Flags, ctx.NopCount);
if (ctx.Flags & SHEMU_FLAG_NOP_SLED)
{
printf(" SHEMU_FLAG_NOP_SLED\n");
}
if (ctx.Flags & SHEMU_FLAG_LOAD_RIP)
{
printf(" SHEMU_FLAG_LOAD_RIP\n");
}
if (ctx.Flags & SHEMU_FLAG_WRITE_SELF)
{
printf(" SHEMU_FLAG_WRITE_SELF\n");
}
if (ctx.Flags & SHEMU_FLAG_TIB_ACCESS)
{
printf(" SHEMU_FLAG_TIB_ACCESS\n");
}
if (ctx.Flags & SHEMU_FLAG_SYSCALL)
{
printf(" SHEMU_FLAG_SYSCALL\n");
}
if (ctx.Flags & SHEMU_FLAG_STACK_STR)
{
printf(" SHEMU_FLAG_STACK_STR\n");
}
if (ctx.Flags & SHEMU_FLAG_KPCR_ACCESS)
{
printf(" SHEMU_FLAG_KPCR_ACCESS\n");
}
if (ctx.Flags & SHEMU_FLAG_SWAPGS)
{
printf(" SHEMU_FLAG_SWAPGS\n");
}
if (ctx.Flags & SHEMU_FLAG_SYSCALL_MSR_READ)
{
printf(" SHEMU_FLAG_SYSCALL_MSR_READ\n");
}
if (ctx.Flags & SHEMU_FLAG_SYSCALL_MSR_WRITE)
{
printf(" SHEMU_FLAG_SYSCALL_MSR_WRITE\n");
}
if (fNameDecoded != NULL)
{
hFile = CreateFileA(fNameDecoded, GENERIC_WRITE, FILE_SHARE_READ, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
printf("Could not open the file %s : 0x%08x\n", fNameDecoded, GetLastError());
return;
}
WriteFile(hFile, (BYTE *)ctx.Shellcode, (DWORD)fsize, &outSize, NULL);
if (outSize == 0)
{
printf("No bytes written to %s!\n", fNameDecoded);
}
CloseHandle(hFile);
free(fNameDecoded);
}
free(ctx.Shellcode);
free(ctx.Stack);
free(ctx.Intbuf);
}
//
// _tmain
//
int main(
__in int argc,
__in char* argv[]
)
{
HANDLE hFile, hMapping;
DWORD fsize, offset;
SIZE_T rip;
char text[ND_MIN_BUF_SIZE], *fname, *target, *shemuCtxFname;
BYTE mode, print, highlight, fmode, hmode, stats, exi, vend, search, isShemu, isShemuCtxf, isKernel;
INT ret, i;
BYTE hexbuf[256], *buffer;
DISASM_OPTIONS options;
// preinit
buffer = NULL;
memset(text, 0, sizeof(text));
memset(&options, 0, sizeof(options));
print = 1;
highlight = 0;
fmode = 0;
hmode = 0;
stats = 0;
exi = 0;
offset = 0;
search = 0;
vend = ND_VEND_ANY;
fname = NULL;
mode = ND_CODE_16;
hFile = NULL;
hMapping = NULL;
target = NULL;
shemuCtxFname = NULL;
rip = 0;
isShemu = 0;
isShemuCtxf = 0;
isKernel = 0;
if (NULL == argv)
{
return -1;
}
if (argc < 3)
{
uint32_t major, minor, revision;
char *date, *time;
NdGetVersion(&major, &minor, &revision, &date, &time);
printf("Napoca Disassembler version %d.%d.%d, built on %s %s\n", major, minor, revision, date, time);
printf("Usage: disasm -f file|-h hex-string -b[16|32|64] [-nv] [-iv] [-hl] [-s] [-c] [-shctxf contextfile] "
"[-reg_name reg_val]\n");
printf(" -f file specify input file\n");
printf(" -h hexstring specify hex string with instructions\n");
printf(" -o offset start disasm at specified offset\n");
printf(" -r rip use the provided RIP\n");
printf(" -b[16|32|64] set decoding mode; default is 16\n");
printf(" -v[intel|amd|cyrix|any] set preferred vendor\n");
printf(" -s \"ins\" search for the given instructions\n");
printf(" -nv don't print disassembly\n");
printf(" -iv display statistics\n");
printf(" -exi print extended info about instructions\n");
printf(" -shemu emulate the file/hex-string\n");
printf(" -shctxf contextfile specify file that contains the context for shemu. "
"Ignored if shemu is not used. Overrides registers specified in command line\n");
printf(" File format: each row contains the format: [regname]:[regvalue]\n");
printf(" -regname regval specify registers to be set for the shemu context. Ignored if shemu is not used\n");
printf(" Examples of valid command line register naming: \"RegRax\" ; \"rax\" ; \"reg_rax\"\n");
printf(" -k specify kernel mode for shemu emulation. Ignore if shemu is not specified.\n");
printf(" -hl highlight instruction parts:\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
FOREGROUND_BLUE|FOREGROUND_GREEN|FOREGROUND_RED|FOREGROUND_INTENSITY);
printf(" light white prefixes\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|FOREGROUND_INTENSITY);
printf(" light green opcodes\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|FOREGROUND_RED|FOREGROUND_INTENSITY);
printf(" light yellow modrm and sib\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_INTENSITY);
printf(" light blue displacement\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED|FOREGROUND_INTENSITY);
printf(" light red relative offset, immediate, address\n");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_GREEN|FOREGROUND_RED);
printf("Instrux size: %zx bytes\n", sizeof(INSTRUX));
ret = -1;
goto cleanup_and_exit;
}
i = 1;
while (i < argc)
{
DWORD gprIdx;
if (match_gpr(argv[i], &gprIdx))
{
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], "-shctxf") == 0)
{
if (i + 1 < argc)
{
isShemuCtxf = 1;
options.UseShemuRegs = TRUE;
shemuCtxFname = argv[i + 1];
i++;
}
}
else if (strcmp(argv[i], "-shemu") == 0)
{
isShemu = 1;
}
else if (argv[i][0] == '-' && argv[i][1] == 'f' && argv[i][2] == 0)
{
if (i + 1 < argc)
{
fmode = 1;
fname = argv[i + 1];
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'h' && argv[i][2] == 0)
{
if (i + 1 < argc)
{
hmode = 1;
fname = argv[i + 1];
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'o' && argv[i][2] == 0)
{
if (i + 1 < argc)
{
sscanf_s(argv[i + 1], "%x", &offset);
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'r' && argv[i][2] == 0)
{
if (i + 1 < argc)
{
sscanf_s(argv[i + 1], "%zx", &rip);
i++;
}
}
else if (argv[i][0] == '-' && argv[i][1] == 'k' && argv[i][2] == 0)
{
isKernel = 1;
}
else if (0 == strcmp(argv[i], "-b16"))
{
mode = ND_CODE_16;
}
else if (0 == strcmp(argv[i], "-b32"))
{
mode = ND_CODE_32;
}
else if (0 == strcmp(argv[i], "-b64"))
{
mode = ND_CODE_64;
}
else if (0 == strcmp(argv[i], "-vintel"))
{
vend = ND_VEND_INTEL;
}
else if (0 == strcmp(argv[i], "-vamd"))
{
vend = ND_VEND_AMD;
}
else if (0 == strcmp(argv[i], "-vgeode"))
{
vend = ND_VEND_GEODE;
}
else if (0 == strcmp(argv[i], "-vcyrix"))
{
vend = ND_VEND_CYRIX;
}
else if (0 == strcmp(argv[i], "-vany"))
{
vend = ND_VEND_ANY;
}
else if (0 == strcmp(argv[i], "-nv"))
{
print = 0;
}
else if (0 == strcmp(argv[i], "-hl"))
{
highlight = 1;
}
else if (0 == strcmp(argv[i], "-iv"))
{
stats = 1;
}
else if (0 == strcmp(argv[i], "-exi"))
{
exi = 1;
}
else if (0 == strcmp(argv[i], "-s"))
{
search = 1;
if (i + 1 == argc)
{
printf("-s requires an argument!\n");
return -1;
}
target = argv[++i];
if (strlen(target) >= ND_MIN_BUF_SIZE)
{
printf("Target instruction too long! Max is %d bytes!\n", ND_MIN_BUF_SIZE);
return -1;
}
}
else
{
printf("Unknown option: '%s'\n", argv[i]);
}
i++;
}
if (0 == fmode && 0 == hmode)
{
printf("Expecting -f or -h option!\n");
return -1;
}
if (fmode)
{
// Open the file.
hFile = CreateFileA(fname, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
printf("Couldn't open file '%s': 0x%08x\n", fname, GetLastError());
ret = -1;
goto cleanup_and_exit;
}
// Create a file mapping.
hMapping = CreateFileMappingA(hFile, NULL, PAGE_READWRITE, 0, 0, "DisasmFile");
if (NULL == hMapping)
{
printf("Couldn't create file mapping for '%s': 0x%08x\n", argv[1], GetLastError());
ret = -1;
goto cleanup_and_exit;
}
// Map the file.
buffer = MapViewOfFile(hMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if (NULL == buffer)
{
printf("Couldn't map the view for '%s': 0x%08x\n", argv[1], GetLastError());
ret = -1;
goto cleanup_and_exit;
}
fsize = GetFileSize(hFile, NULL);
}
else
{
DWORD idx;
memset(hexbuf, 0, sizeof(hexbuf));
fsize = (DWORD)strlen(fname);
if (fsize > 512)
{
printf("Max 256-bytes buffer accepted!\n");
return -1;
}
if (fsize % 2 == 1)
{
printf("Even-sized hex buffer expected!\n");
return -1;
}
for (idx = 0; idx < fsize / 2; idx++)
{
hexbuf[idx] = ((hex_to_bin(fname[idx * 2]) << 4) | (hex_to_bin(fname[idx * 2 + 1]))) & 0xFF;
}
fname = NULL;
fsize /= 2;
buffer = hexbuf;
}
if (offset >= fsize)
{
printf("The offset exceeds the buffer size!\n");
ret = -1;
goto cleanup_and_exit;
}
options.FileName = fname;
options.Buffer = buffer;
options.Size = fsize;
options.ExtendedInfo = exi;
options.Highlight = highlight;
options.Mode = mode;
options.Ring = isKernel ? 0 : 3;
options.Offset = offset;
options.Stats = stats;
options.Search = search;
options.Target = target;
options.Print = print;
options.Vendor = vend;
options.Rip = rip;
if (isShemu)
{
if (isShemuCtxf)
{
set_shemuctx_file(shemuCtxFname, &options);
}
handle_shemu(&options);
}
else if (search)
{
handle_search(&options);
}
else
{
handle_disasm(&options);
}
// All should be good.
ret = 0;
cleanup_and_exit:
if (fmode)
{
if (NULL != buffer)
{
UnmapViewOfFile(buffer);
buffer = NULL;
}
if (NULL != hMapping)
{
CloseHandle(hMapping);
hMapping = NULL;
}
if ((NULL != hFile) && (INVALID_HANDLE_VALUE != hFile))
{
CloseHandle(hFile);
hFile = NULL;
}
}
return ret;
}
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