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vmprofiler/include/vmutils.hpp

150 lines
4.9 KiB

#pragma once
#include <Zydis/Utils.h>
#include <Zydis/Zydis.h>
#include <optional>
#include <vector>
#include <xmmintrin.h>
#ifdef _MSC_VER
#include <stdlib.h>
#define bswap_32(x) _byteswap_ulong(x)
#define bswap_64(x) _byteswap_uint64(x)
#define bswap_16(x) _byteswap_ushort(x)
#elif defined(__APPLE__)
// Mac OS X / Darwin features
#include <libkern/OSByteOrder.h>
#define bswap_32(x) OSSwapInt32(x)
#define bswap_64(x) OSSwapInt64(x)
#elif defined(__sun) || defined(sun)
#include <sys/byteorder.h>
#define bswap_32(x) BSWAP_32(x)
#define bswap_64(x) BSWAP_64(x)
#elif defined(__FreeBSD__)
#include <sys/endian.h>
#define bswap_32(x) bswap32(x)
#define bswap_64(x) bswap64(x)
#elif defined(__OpenBSD__)
#include <sys/types.h>
#define bswap_32(x) swap32(x)
#define bswap_64(x) swap64(x)
#elif defined(__NetBSD__)
#include <sys/types.h>
#include <machine/bswap.h>
#if defined(__BSWAP_RENAME) && !defined(__bswap_32)
#define bswap_32(x) bswap32(x)
#define bswap_64(x) bswap64(x)
#endif
#else
#include <byteswap.h>
#endif
using u8 = unsigned char;
using u16 = unsigned short;
using u32 = unsigned int;
using u64 = unsigned long long;
using u128 = __m128;
using zydis_decoded_instr_t = ZydisDecodedInstruction;
using zydis_register_t = ZydisRegister;
using zydis_mnemonic_t = ZydisMnemonic;
using zydis_decoded_operand_t = ZydisDecodedOperand;
struct zydis_instr_t
{
zydis_decoded_instr_t instr;
std::vector< u8 > raw;
std::uintptr_t addr;
};
using zydis_routine_t = std::vector< zydis_instr_t >;
/// <summary>
/// utils used by the other cpp files... misc things that get used a lot...
/// </summary>
namespace vm::util
{
/// <summary>
/// utils pertaining to native registers...
/// </summary>
namespace reg
{
/// <summary>
/// converts say... AL to RAX...
/// </summary>
/// <param name="reg">a zydis decoded register value...</param>
/// <returns>returns the largest width register of the given register... AL gives RAX...</returns>
zydis_register_t to64( zydis_register_t reg );
/// <summary>
/// compares to registers with each other... calls to64 and compares...
/// </summary>
/// <param name="a">register a...</param>
/// <param name="b">register b...</param>
/// <returns>returns true if register to64(a) == to64(b)...</returns>
bool compare( zydis_register_t a, zydis_register_t b );
} // namespace reg
/// <summary>
/// get the instruction that fetches an operand out of VIP...
/// </summary>
/// <param name="routine">this is a deobfuscated, flattened, view of any set of native instructions that read an operand out of VIP... can be calc_jmp, vm_entry, or vm handlers...</param>
/// <param name="fetch_instr"></param>
/// <returns>returns true of the fetch operand native instruction is found...</returns>
bool get_fetch_operand( const zydis_routine_t &routine, zydis_instr_t &fetch_instr );
/// <summary>
/// gets the instruction that fetches an operand out of VIP and returns an iterator to it...
/// </summary>
/// <param name="routine">this is a deobfuscated, flattened, view of any set of native instructions that read an operand out of VIP... can be calc_jmp, vm_entry, or vm handlers...</param>
/// <returns>returns the iterator of the native instruction, else an empty std::optional...</returns>
std::optional< zydis_routine_t::iterator > get_fetch_operand( zydis_routine_t &routine );
/// <summary>
/// prints a disassembly view of a routine...
/// </summary>
/// <param name="routine">reference to a zydis_routine_t to be printed...</param>
void print( zydis_routine_t &routine );
/// <summary>
/// prints a single disassembly view of an instruction...
/// </summary>
/// <param name="instr">instruction to print...</param>
void print( const zydis_decoded_instr_t &instr );
/// <summary>
/// determines if a given decoded native instruction is a JCC...
/// </summary>
/// <param name="instr"></param>
/// <returns></returns>
bool is_jmp( const zydis_decoded_instr_t &instr );
/// <summary>
/// flatten native instruction stream, takes every JCC (follows the branch)...
/// </summary>
/// <param name="routine">filled with decoded instructions...</param>
/// <param name="routine_addr">linear virtual address to start flattening from...</param>
/// <param name="keep_jmps">keep JCC's in the flattened instruction stream...</param>
/// <returns>returns true if flattened was successful...</returns>
bool flatten( zydis_routine_t &routine, std::uintptr_t routine_addr, bool keep_jmps = false );
/// <summary>
/// deadstore deobfuscation of a flattened routine...
/// </summary>
/// <param name="routine">reference to a flattened instruction vector...</param>
void deobfuscate( zydis_routine_t &routine );
} // namespace vm::util