反汇编引擎编写

说在前面

反汇编引擎是众多逆向分析工具都必有,也是比较核心的功能,编写需要的基础知识已经在硬编码前面几节内容说到,本次编写只针对了Mod R/M 和 SIB字段的编写，写的并不全，经过这次编写主要还是练习c++，写到后面发现还是最开始设计时,功能封装并没有设计好，其实写这个引擎设计非常重要,但这次编写没有设计好思路，写到后面已经没有再想写的欲望了：结构很乱,最开始定义成员的时候就没有想好。说到底还是经验太少。不过在编写过程中还是收获很多,对c++理解又深刻了一些,多练其实是提升代码水平的不二之选。还是写了一小段,舍不得，先记录下来吧。下次写个完整的出来。
代码

编译环境 win10 vs2019
   1 #include <iostream>
   2 #include <string>
   3 #include <windows.h>
   4 
   5 
   6 class PrintIns
   7 {
   8 private:
   9     DWORD Index;
  10     DWORD FindIndex(LPSTR Buffer,char cha)
  11     {
  12         for (DWORD i = 0; Buffer[i] != 0; i++)
  13         {
  14             if (Buffer[i] == cha)
  15             {
  16                 return i;
  17             }
  18         }
  19         return 0;
  20     }
  21     LPCSTR DeterminSegReg(LPSTR Buffer)
  22     {
  23         DWORD IndexEnd = FindIndex(Buffer, ']');
  24         for (DWORD i = FindIndex(Buffer,'['); i< IndexEnd; i++)
  25         {
  26             if (Buffer[i] == 'e')
  27             {
  28                 if (Buffer[i + 1] == 'b' || Buffer[i + 1] == 's')
  29                 {
  30                    if (Buffer[i + 2] == 'p')
  31                        return "ss";
  32                 }
  33             }
  34         }
  35         return "ds";
  36     }
  37     LPSTR FixBuffer(LPSTR Buffer,int SubIndex, const LPBYTE HardCode,DWORD ModNum,DWORD Disp)  //修复缓冲区,主要是修复段寄存器,定位到ModR/M字段
  38     {
  39         LPSTR NewBuffer = (LPSTR)malloc(0x20);
  40         DWORD NewIndex = Index;
  41         NewIndex = NewIndex - SubIndex;
  42         memset(NewBuffer, 0, 0x20);
  43         if (Disp != NULL)
  44         {
  45             sprintf(NewBuffer, "%s%s%s+%s+%x%s", DeterminSegReg(Buffer), ":[", ReadBase(HardCode[++NewIndex], ModNum), ReadIndexScale(HardCode[NewIndex]), Disp, "]");
  46         }
  47         else
  48         {
  49             sprintf(NewBuffer, "%s%s%s+%s%s", DeterminSegReg(Buffer), ":[", ReadBase(HardCode[++NewIndex], ModNum), ReadIndexScale(HardCode[NewIndex]), "]");
  50         }
  51         return NewBuffer;
  52     }
  53     void PrintVariableLengthIns(const LPBYTE HardCode)
  54     {
  55         IfModRM(HardCode);
  56     }
  57     void IfModRM(const LPBYTE HardCode)
  58     {
  59         DWORD Reg = (HardCode[++Index] & 0x38) >> 3;
  60         DWORD Mod = (HardCode[Index] & 0xC0) >> 6;
  61         DWORD RM = HardCode[Index] & 0x07;
  62         Index--;        //定位到opcode
  63         if (0x0 <= HardCode[Index] && 0x3 >= HardCode[Index])
  64         {
  65             MeanAdd(HardCode, Mod, RM, Reg);
  66         }
  67         else if (0x8 <= HardCode[Index] && 0xB >= HardCode[Index])
  68         {
  69             MeanOr(HardCode, Mod, RM, Reg);
  70         }
  71         else if (0x10 <= HardCode[Index] && 0x13 >= HardCode[Index])
  72         {
  73             MeanAdc(HardCode, Mod, RM, Reg);
  74         }
  75         else if (0x18 <= HardCode[Index] && 0x1B >= HardCode[Index])
  76         {
  77             MeanSbb(HardCode, Mod, RM, Reg);
  78         }
  79         else if (0x20 <= HardCode[Index] && 0x23 >= HardCode[Index])
  80         {
  81             MeanAnd(HardCode, Mod, RM, Reg);
  82         }
  83         else if (0x28 <= HardCode[Index] && 0x2B >= HardCode[Index])
  84         {
  85             MeanSub(HardCode, Mod, RM, Reg);
  86         }
  87         else if (0x30 <= HardCode[Index] && 0x33 >= HardCode[Index])
  88         {
  89             MeanXor(HardCode, Mod, RM, Reg);
  90         }
  91         else if (0x38 <= HardCode[Index] && 0x3B >= HardCode[Index])
  92         {
  93             MeanCmp(HardCode, Mod, RM, Reg);
  94         }
  95         else if (0x88 <= HardCode[Index] && 0x8B > HardCode[Index])
  96         {
  97             MeanMov(HardCode, Mod, RM, Reg);
  98         }
  99 
 100         
 101     }
 102     LPCSTR ReadRegX8(DWORD RegNumber)
 103     {
 104         switch (RegNumber)
 105         {
 106         case 0x0:
 107             return "al";
 108         case 0x1:
 109             return "cl";
 110         case 0x2:
 111             return "dl";
 112         case 0x3:
 113             return "bl";
 114         case 0x4:
 115             return "ah";
 116         case 0x5:
 117             return "ch";
 118         case 0x6:
 119             return "dh";
 120         case 0x7:
 121             return "bh";
 122         default:
 123             return "false";
 124         }
 125     }
 126     LPCSTR ReadRegX32(DWORD RegNumber)
 127     {
 128         switch (RegNumber)
 129         {
 130         case 0x0:
 131             return "eax";
 132         case 0x1:
 133             return "ecx";
 134         case 0x2:
 135             return "edx";
 136         case 0x3:
 137             return "ebx";
 138         case 0x4:
 139             return "esp";
 140         case 0x5:
 141             return "ebp";
 142         case 0x6:
 143             return "esi";
 144         case 0x7:
 145             return "edi";
 146         default:
 147             return "false";
 148         }
 149     }
 150     LPCSTR ReadModRM(const LPBYTE HardCode, DWORD ModNum, DWORD RMNum)
 151     {
 152         if (ModNum == 0x0)
 153         {
 154             Index++;   //ModR/M字段
 155             LPSTR Buffer = (LPSTR)malloc(0x20);
 156             memset(Buffer, 0, 0x20);
 157             DWORD disp32;
 158             switch (RMNum)
 159             {
 160             case 0x0:
 161                 sprintf(Buffer, "%s%s%s","ds:[", "eax","]");
 162                 return Buffer;
 163             case 0x1:
 164                 sprintf(Buffer, "%s%s%s", "ds:[", "ecx", "]");
 165                 return Buffer;
 166             case 0x2:
 167                 sprintf(Buffer, "%s%s%s", "ds:[", "edx", "]");
 168                 return Buffer;
 169             case 0x3:
 170                 sprintf(Buffer, "%s%s%s", "ds:[", "ebx", "]");
 171                 return Buffer;
 172             case 0x4:                
 173                 sprintf(Buffer, "%s%s%s%s", "ss:[",ReadBase(HardCode[++Index], ModNum), ReadIndexScale(HardCode[Index]),"]");
 174                 return FixBuffer(Buffer,1, HardCode, ModNum,NULL);
 175             case 0x5:
 176                 disp32 = (HardCode[++Index]) + (HardCode[++Index] << 8) + (HardCode[++Index] << 16) + (HardCode[++Index] << 24);
 177                 sprintf(Buffer,"%s%x%s", "ds:[", disp32,"]");
 178                 return Buffer;
 179             case 0x6:
 180                 sprintf(Buffer, "%s%s%s", "ds:[", "esi", "]");
 181                 return Buffer;
 182             case 0x7:
 183                 sprintf(Buffer, "%s%s%s", "ds:[", "edi", "]");
 184                 return Buffer;
 185             default:
 186                 return Buffer;
 187             }
 188         }
 189         else if (ModNum == 0x1)
 190         {
 191             Index++;
 192             DWORD disp8 = HardCode[++Index];
 193             LPSTR BufferDisp8 = (LPSTR)malloc(0x20);
 194             memset(BufferDisp8, 0, 0x20);
 195             LPSTR NewBuffer;
 196             switch (RMNum)
 197             {
 198             case 0x0:
 199                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[","eax+", disp8, "]");
 200                 return BufferDisp8;
 201             case 0x1:
 202                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "ecx+", disp8, "]");
 203                 return BufferDisp8;
 204             case 0x2:
 205                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "edx+", disp8, "]");
 206                 return BufferDisp8;
 207             case 0x3:
 208                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "ebx+", disp8, "]");
 209                 return BufferDisp8;
 210             case 0x4:
 211                 disp8 = HardCode[++Index];        
 212                 sprintf(BufferDisp8, "%s%s%s+%x%s", "ss:[", ReadBase(HardCode[--Index], ModNum), ReadIndexScale(HardCode[Index]), disp8, "]");           
 213                 NewBuffer = FixBuffer(BufferDisp8, 1, HardCode, ModNum, disp8);
 214                 Index++;
 215                 return NewBuffer;
 216             case 0x5:
 217                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "ebpx+", disp8, "]");
 218                 return FixBuffer(BufferDisp8,1, HardCode, ModNum, disp8);
 219             case 0x6:
 220                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "esi+", disp8, "]");
 221                 return BufferDisp8;
 222             case 0x7:
 223                 sprintf(BufferDisp8, "%s%s%x%s", "ds:[", "edi+", disp8, "]");
 224                 return BufferDisp8;
 225             default:
 226                 return BufferDisp8;
 227             }
 228         }
 229         //
 230         else if (ModNum == 0x2)
 231         {
 232             Index++;
 233             DWORD disp32 = (HardCode[++Index]) + (HardCode[++Index] << 8) + (HardCode[++Index] << 16) + (HardCode[++Index] << 24);
 234             LPSTR BufferDisp32 = (LPSTR)malloc(0x20);
 235             memset(BufferDisp32, 0, 0x20);
 236             LPSTR NewBuffer;
 237             switch (RMNum)
 238             {
 239             case 0x0:
 240                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "eax+", disp32, "]");
 241                 return BufferDisp32;
 242             case 0x1:
 243                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "ecx+", disp32, "]");
 244                 return BufferDisp32;
 245             case 0x2:
 246                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "edx+", disp32, "]");
 247                 return BufferDisp32;
 248             case 0x3:
 249                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "ebx+", disp32, "]");
 250                 return BufferDisp32;
 251             case 0x4:
 252                 Index = Index - 3;     //定位到SIB字段
 253                 disp32 = (HardCode[++Index]) + (HardCode[++Index] << 8) + (HardCode[++Index] << 16) + (HardCode[++Index] << 24);    //算偏移
 254                 Index = Index - 4;   //重新定位到SIB字段
 255                 sprintf(BufferDisp32, "%s%s%s+%x%s", "ss:[", ReadBase(HardCode[Index], ModNum), ReadIndexScale(HardCode[Index]), disp32, "]");
 256                 NewBuffer = FixBuffer(BufferDisp32, 1, HardCode, ModNum, disp32);
 257                 Index = Index + 4;    //索引复原
 258                 return NewBuffer;
 259             case 0x5:
 260                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "ebp+", disp32, "]");
 261                 return FixBuffer(BufferDisp32, 5, HardCode, ModNum, disp32);
 262             case 0x6:
 263                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "esi+", disp32, "]");
 264                 return BufferDisp32;
 265             case 0x7:
 266                 sprintf(BufferDisp32, "%s%s%x%s", "ds:[", "edi+", disp32, "]");
 267                 return BufferDisp32;
 268             default:
 269                 return BufferDisp32;
 270             }
 271         }
 272         else if (ModNum == 0x3)
 273         {
 274             LPSTR Buffer = (LPSTR)malloc(0x20);
 275             memset(Buffer, 0, 0x20);
 276             switch (RMNum)
 277             {
 278             case 0x0:
 279                 sprintf(Buffer, "%s%s%s", "ds:[", "eax", "]");
 280                 return Buffer;
 281             case 0x1:
 282                 sprintf(Buffer, "%s%s%s", "ds:[", "ecx", "]");
 283                 return Buffer;
 284             case 0x2:
 285                 sprintf(Buffer, "%s%s%s", "ds:[", "edx", "]");
 286                 return Buffer;
 287             case 0x3:
 288                 sprintf(Buffer, "%s%s%s", "ds:[", "ebx", "]");
 289                 return Buffer;
 290             case 0x4:
 291                 sprintf(Buffer, "%s%s%s", "ds:[", "esp", "]");
 292                 return Buffer;
 293             case 0x5:
 294                 sprintf(Buffer, "%s%s%s", "ds:[", "ebp", "]");
 295                 return Buffer;
 296             case 0x6:
 297                 sprintf(Buffer, "%s%s%s", "ds:[", "esi", "]");
 298                 return Buffer;
 299             case 0x7:
 300                 sprintf(Buffer, "%s%s%s", "ds:[", "edi", "]");
 301                 return Buffer;
 302             default:
 303                 return Buffer;
 304             }
 305         }
 306         else
 307         {
 308             return "ModRMfalse";
 309         }
 310     }
 311     LPCSTR ReadBase(DWORD SibNumber,DWORD Mod)
 312     {
 313         DWORD Base = SibNumber & 0x07;
 314         switch (Base)
 315         {
 316         case 0x0:
 317             return "eax";
 318         case 0x1:
 319             return "ecx";
 320         case 0x2:
 321             return "edx";
 322         case 0x3:
 323             return "ebx";
 324         case 0x4:
 325             return "esp";
 326         case 0x5:
 327             if (Mod == 0x0)
 328             {
 329                 return "";
 330             }
 331             else
 332             {
 333                 return "ebp";
 334             }
 335         case 0x6:
 336             return "esi";
 337         case 0x7:
 338             return "edi";
 339         default:
 340             return "false";
 341         }
 342     }
 343     LPCSTR ReadIndexScale(DWORD SibNumber)
 344     {
 345         DWORD Scale = (SibNumber & 0xC0) >> 6;
 346         DWORD Inde = (SibNumber & 0x38) >> 3;
 347         if (Scale == 0x0)
 348         {
 349             switch (Inde)
 350             {
 351             case 0x0:
 352                 return "eax";
 353             case 0x1:
 354                 return "ecx";
 355             case 0x2:
 356                 return "edx";
 357             case 0x3:
 358                 return "ebx";
 359             case 0x4:
 360                 return "还没写";
 361             case 0x5:
 362                 return "ebp";
 363             case 0x6:
 364                 return "esi";
 365             case 0x7:
 366                 return "edi";
 367             default:
 368                 return "false";
 369             }
 370         }
 371         if (Scale == 0x1)
 372         {
 373             switch (Inde)
 374             {
 375             case 0x0:
 376                 return "eax*2";
 377             case 0x1:
 378                 return "ecx*2";
 379             case 0x2:
 380                 return "edx*2";
 381             case 0x3:
 382                 return "ebx*2";
 383             case 0x4:
 384                 return "还没写";
 385             case 0x5:
 386                 return "ebp*2";
 387             case 0x6:
 388                 return "esi*2";
 389             case 0x7:
 390                 return "edi*2";
 391             default:
 392                 return "false";
 393             }
 394         }
 395         if (Scale == 0x2)
 396         {
 397             switch (Inde)
 398             {
 399             case 0x0:
 400                 return "eax*4";
 401             case 0x1:
 402                 return "ecx*4";
 403             case 0x2:
 404                 return "edx*4";
 405             case 0x3:
 406                 return "ebx*4";
 407             case 0x4:
 408                 return "还没写";
 409             case 0x5:
 410                 return "ebp*4";
 411             case 0x6:
 412                 return "esi*4";
 413             case 0x7:
 414                 return "edi*4";
 415             default:
 416                 return "false";
 417             }
 418         }
 419         if (Scale == 0x3)
 420         {
 421             switch (Inde)
 422             {
 423             case 0x0:
 424                 return "eax*8";
 425             case 0x1:
 426                 return "ecx*8";
 427             case 0x2:
 428                 return "edx*8";
 429             case 0x3:
 430                 return "ebx*8";
 431             case 0x4:
 432                 return "还没写";
 433             case 0x5:
 434                 return "ebp*8";
 435             case 0x6:
 436                 return "esi*8";
 437             case 0x7:
 438                 return "edi*8";
 439             default:
 440                 return "false";
 441             }
 442         }
 443     }
 444 public:
 445   
 446     void CallDisasmEngine(const LPBYTE HardCode,DWORD HClength)    //传入一个数组地址和它的长度
 447     {
 448         for (Index = 0; Index < HClength; Index++)
 449         {
 450             //push系列
 451             if (0x50 <= HardCode[Index] && HardCode[Index] <= 0x57)
 452             {
 453                 switch (HardCode[Index])
 454                 {
 455                 case 0x50:
 456                     printf("%08x %x:  push eax\n",Index, HardCode[Index]);
 457                     break;
 458                 case 0x51:
 459                     printf("%08x %x:  push ecx\n", Index, HardCode[Index]);
 460                     break;
 461                 case 0x52:
 462                     printf("%08x %x:  push edx\n", Index, HardCode[Index]);
 463                     break;
 464                 case 0x53:
 465                     printf("%08x %x:  push ebx\n", Index, HardCode[Index]);
 466                     break;
 467                 case 0x54:
 468                     printf("%08x %x:  push esp\n", Index, HardCode[Index]);
 469                     break;
 470                 case 0x55:
 471                     printf("%08x %x:  push ebp\n", Index, HardCode[Index]);
 472                     break;
 473                 case 0x56:
 474                     printf("%08x %x:  push esi\n", Index, HardCode[Index]);
 475                     break;
 476                 case 0x57:
 477                     printf("%08x %x:  push edi\n", Index, HardCode[Index]);
 478                     break;           
 479                 }
 480             }
 481             //pop系列
 482             else if (0x58 <= HardCode[Index] && HardCode[Index] <= 0x5F)
 483             {
 484                 switch (HardCode[Index])
 485                 {
 486                 case 0x58:
 487                     printf("%08x %x:  pop eax\n", Index, HardCode[Index]);
 488                     break;
 489                 case 0x59:
 490                     printf("%08x %x:  pop ecx\n", Index, HardCode[Index]);
 491                     break;
 492                 case 0x5A:
 493                     printf("%08x %x:  pop edx\n", Index, HardCode[Index]);
 494                     break;
 495                 case 0x5B:
 496                     printf("%08x %x:  pop ebx\n", Index, HardCode[Index]);
 497                     break;
 498                 case 0x5C:
 499                     printf("%08x %x:  pop esp\n", Index, HardCode[Index]);
 500                     break;
 501                 case 0x5D:
 502                     printf("%08x %x:  pop ebp\n", Index, HardCode[Index]);
 503                     break;
 504                 case 0x5E:
 505                     printf("%08x %x:  pop esi\n", Index, HardCode[Index]);
 506                     break;
 507                 case 0x5F:
 508                     printf("%08x %x:  pop edi\n", Index, HardCode[Index]);
 509                     break;
 510                 }
 511                 continue;
 512             }
 513             //INC系列
 514             else if (0x40 <= HardCode[Index] && HardCode[Index] <= 0x47)
 515             {
 516                 switch (HardCode[Index])
 517                 {
 518                 case 0x40:
 519                     printf("%08x %x:  inc eax\n", Index, HardCode[Index]);
 520                     break;
 521                 case 0x41:
 522                     printf("%08x %x:  inc ecx\n", Index, HardCode[Index]);
 523                     break;
 524                 case 0x42:
 525                     printf("%08x %x:  inc edx\n", Index, HardCode[Index]);
 526                     break;
 527                 case 0x43:
 528                     printf("%08x %x:  inc ebx\n", Index, HardCode[Index]);
 529                     break;
 530                 case 0x44:
 531                     printf("%08x %x:  inc esp\n", Index, HardCode[Index]);
 532                     break;
 533                 case 0x45:
 534                     printf("%08x %x:  inc ebp\n", Index, HardCode[Index]);
 535                     break;
 536                 case 0x46:
 537                     printf("%08x %x:  inc esi\n", Index, HardCode[Index]);
 538                     break;
 539                 case 0x47:
 540                     printf("%08x %x:  inc edi\n", Index, HardCode[Index]);
 541                     break;
 542                 }
 543             }
 544             //DEC系列
 545             else if (0x48 <= HardCode[Index] && HardCode[Index] <= 0x4F)
 546             {
 547                 switch (HardCode[Index])
 548                 {
 549                 case 0x48:
 550                     printf("%08x %x:  dec eax\n", Index, HardCode[Index]);
 551                     break;
 552                 case 0x49:
 553                     printf("%08x %x:  dec ecx\n", Index, HardCode[Index]);
 554                     break;
 555                 case 0x4A:
 556                     printf("%08x %x:  dec edx\n", Index, HardCode[Index]);
 557                     break;
 558                 case 0x4B:
 559                     printf("%08x %x:  dec ebx\n", Index, HardCode[Index]);
 560                     break;
 561                 case 0x4C:
 562                     printf("%08x %x:  dec esp\n", Index, HardCode[Index]);
 563                     break;
 564                 case 0x4D:
 565                     printf("%08x %x:  dec ebp\n", Index, HardCode[Index]);
 566                     break;
 567                 case 0x4E:
 568                     printf("%08x %x:  dec esi\n", Index, HardCode[Index]);
 569                     break;
 570                 case 0x4F:
 571                     printf("%08x %x:  dec edi\n", Index, HardCode[Index]);
 572                     break;
 573                 }
 574             }
 575             //MOV Rb, Ib
 576             else if (0xB0 <= HardCode[Index] && HardCode[Index] <= 0xB7)
 577             {
 578                 switch (HardCode[Index])
 579                 {
 580                 case 0xB0:
 581                     printf("mov al,%x\n", HardCode[++Index]);
 582                     break;
 583                 case 0xB1:
 584                     printf("mov cl,%x\n", HardCode[++Index]);
 585                     break;
 586                 case 0xB2:
 587                     printf("mov dl,%x\n", HardCode[++Index]);
 588                     break;
 589                 case 0xB3:
 590                     printf("mov bl,%x\n", HardCode[++Index]);
 591                     break;
 592                 case 0xB4:
 593                     printf("mov ah,%x\n", HardCode[++Index]);
 594                     break;
 595                 case 0xB5:
 596                     printf("mov ch,%x\n", HardCode[++Index]);
 597                     break;
 598                 case 0xB6:
 599                     printf("mov dh,%x\n", HardCode[++Index]);
 600                     break;
 601                 case 0xB7:
 602                     printf("mov dh,%x\n", HardCode[++Index]);
 603                     break;
 604                 }
 605             }
 606             //MOV ERX, Id
 607             else if (0xB8 <= HardCode[Index] && HardCode[Index] <= 0xBF)
 608             {
 609                 switch (HardCode[Index])
 610                 {
 611                 case 0xB8:
 612                     printf("mov eax,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 613                     break;
 614                 case 0xB9:
 615                     printf("mov ecx,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 616                     break;
 617                 case 0xBA:
 618                     printf("mov edx,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 619                     break;
 620                 case 0xBB:
 621                     printf("mov ebx,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 622                     break;
 623                 case 0xBC:
 624                     printf("mov esp,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 625                     break;
 626                 case 0xBD:
 627                     printf("mov ebp,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 628                     break;
 629                 case 0xBE:
 630                     printf("mov esi,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 631                     break;
 632                 case 0xBF:
 633                     printf("mov edi,%x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 634                     break;
 635                 }
 636             }
 637             //XCHG EAX, ERX
 638             else if (0x90 <= HardCode[Index] && HardCode[Index] <= 0x97)
 639             {
 640                 switch (HardCode[Index])
 641                 {
 642                 case 0x90:
 643                     printf("nop\n");
 644                     break;
 645                 case 0x91:
 646                     printf("xchg ecx,eax\n");
 647                     break;
 648                 case 0x92:
 649                     printf("xchg edx,eax\n");
 650                     break;
 651                 case 0x93:
 652                     printf("xchg ebx,eax\n");
 653                     break;
 654                 case 0x94:
 655                     printf("xchg esp,eax\n");
 656                     break;
 657                 case 0x95:
 658                     printf("xchg ebp,eax\n");
 659                     break;
 660                 case 0x96:
 661                     printf("xchg esi,eax\n");
 662                     break;
 663                 case 0x97:
 664                     printf("xchg edi,eax\n");
 665                     break;
 666                 }
 667             }
 668             //JCC ib
 669             else if (0x70 <= HardCode[Index] && HardCode[Index] <= 0x7F)
 670             {
 671                 switch (HardCode[Index])
 672                 {
 673                 case 0x70:
 674                     printf("jo %x\n", HardCode[++Index]);
 675                     break;
 676                 case 0x71:
 677                     printf("jno %x\n", HardCode[++Index]);
 678                     break;
 679                 case 0x72:
 680                     printf("jb %x\n", HardCode[++Index]);
 681                     break;
 682                 case 0x73:
 683                     printf("jnb %x\n", HardCode[++Index]);
 684                     break;
 685                 case 0x74:
 686                     printf("je %x\n", HardCode[++Index]);
 687                     break;
 688                 case 0x75:
 689                     printf("jne %x\n", HardCode[++Index]);
 690                     break;
 691                 case 0x76:
 692                     printf("jna %x\n", HardCode[++Index]);
 693                     break;
 694                 case 0x77:
 695                     printf("ja %x\n", HardCode[++Index]);
 696                     break;
 697                 case 0x78:
 698                     printf("js %x\n", HardCode[++Index]);
 699                     break;
 700                 case 0x79:
 701                     printf("jns %x\n", HardCode[++Index]);
 702                     break;
 703                 case 0x7A:
 704                     printf("jp %x\n", HardCode[++Index]);
 705                     break;
 706                 case 0x7B:
 707                     printf("jnp %x\n", HardCode[++Index]);
 708                     break;
 709                 case 0x7C:
 710                     printf("jl %x\n", HardCode[++Index]);
 711                     break;
 712                 case 0x7D:
 713                     printf("jnl %x\n", HardCode[++Index]);
 714                     break;
 715                 case 0x7E:
 716                     printf("jle %x\n", HardCode[++Index]);
 717                     break;
 718                 case 0x7F:
 719                     printf("jg %x\n", HardCode[++Index]);
 720                     break;
 721                 }
 722             }
 723             //JCC id
 724             else if(0x0F == HardCode[Index])
 725             {
 726                 if (0x80 <= HardCode[++Index] && HardCode[Index] <= 0x8F)
 727                 {
 728                     switch (HardCode[Index])
 729                     {
 730                     case 0x80:
 731                         printf("jo %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 732                         break;
 733                     case 0x81:
 734                         printf("jno %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 735                         break;
 736                     case 0x82:
 737                         printf("jb %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 738                         break;
 739                     case 0x83:
 740                         printf("jnb %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 741                         break;
 742                     case 0x84:
 743                         printf("je %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 744                         break;
 745                     case 0x85:
 746                         printf("jne %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 747                         break;
 748                     case 0x86:
 749                         printf("jna %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 750                         break;
 751                     case 0x87:
 752                         printf("ja %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 753                         break;
 754                     case 0x88:
 755                         printf("js %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 756                         break;
 757                     case 0x89:
 758                         printf("jns %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 759                         break;
 760                     case 0x8A:
 761                         printf("jp %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 762                         break;
 763                     case 0x8B:
 764                         printf("jnp %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 765                         break;
 766                     case 0x8C:
 767                         printf("jl %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 768                         break;
 769                     case 0x8D:
 770                         printf("jnl %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 771                         break;
 772                     case 0x8E:
 773                         printf("jle %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 774                         break;
 775                     case 0x8F:
 776                         printf("jg %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 777                         break;
 778                     }
 779                 }
 780             }
 781             //LOOP
 782             else if (0xE0 <= HardCode[Index] && HardCode[Index] <= 0xE2)
 783             {
 784                 switch (HardCode[Index])
 785                 {
 786                 case 0xE0:
 787                     printf("loopne %x\n", HardCode[++Index]);
 788                     break;
 789                 case 0xE1:
 790                     printf("loope %x\n", HardCode[++Index]);
 791                     break;
 792                 case 0xE2:
 793                     printf("loop %x\n", HardCode[++Index]);
 794                     break;
 795                 }
 796             }
 797             //Jrcxz
 798             else if (0xE0 == HardCode[Index])
 799             {
 800                 printf("jrcxz %x\n", HardCode[++Index]);
 801             }
 802             //e8 e9 ea eb
 803             else if (0xE8 <= HardCode[Index] && HardCode[Index] <= 0xEB)
 804             {
 805                 switch (HardCode[Index])
 806                 {
 807                 case 0xE8:
 808                     printf("call %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 809                     break;
 810                 case 0xE9:
 811                     printf("jmp %x%x%x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 812                     break;
 813                 case 0xEA:
 814                     printf("loop %x%x%x%x  %x%x\n", HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index], HardCode[++Index]);
 815                     break;
 816                 case 0xEB:
 817                     printf("loop %x\n", HardCode[++Index]);
 818                     break;
 819                 }
 820             }
 821             //c2 c3
 822             else if (HardCode[Index] == 0xc2)
 823             {
 824                 printf("ret %x%x\n", HardCode[++Index], HardCode[++Index]);
 825             }
 826             else if (HardCode[Index] == 0xc3)
 827             {
 828                 printf("ret\n");
 829             }
 830             else if (HardCode[Index] == 0xCB)
 831             {
 832                 printf("ret far");
 833             }
 834             else if (HardCode[Index] == 0xCA)
 835             {
 836                 printf("ret far %x%x", HardCode[++Index], HardCode[++Index]);
 837             }
 838             else
 839             {
 840                 PrintVariableLengthIns(HardCode);
 841             }
 842             
 843         }
 844     }
 845     //解释Add
 846     void MeanAdd(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 847     {
 848         LPCSTR buffer;
 849         switch (HardCode[Index])
 850         {
 851         case 0x00:
 852             buffer = ReadModRM(HardCode, Mod, RM);
 853             printf("add byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 854             free((LPVOID)buffer);
 855             break;
 856         case 0x01:
 857             buffer = ReadModRM(HardCode, Mod, RM);
 858             printf("add dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 859             free((LPVOID)buffer);
 860             break;
 861         case 0x02:
 862             buffer = ReadModRM(HardCode, Mod, RM);
 863             printf("add %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
 864             free((LPVOID)buffer);
 865             break;
 866         case 0x03:
 867             buffer = ReadModRM(HardCode, Mod, RM);
 868             printf("add %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
 869             free((LPVOID)buffer);
 870             break;
 871         }
 872     }
 873     //解释or
 874     void MeanOr(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 875     {
 876         LPCSTR buffer;
 877         switch (HardCode[Index])
 878         {
 879         case 0x08:
 880             buffer = ReadModRM(HardCode, Mod, RM);
 881             printf("or byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 882             free((LPVOID)buffer);
 883             break;
 884         case 0x09:
 885             buffer = ReadModRM(HardCode, Mod, RM);
 886             printf("or dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 887             free((LPVOID)buffer);
 888             break;
 889         case 0x0A:
 890             buffer = ReadModRM(HardCode, Mod, RM);
 891             printf("or %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
 892             free((LPVOID)buffer);
 893             break;
 894         case 0x0B:
 895             buffer = ReadModRM(HardCode, Mod, RM);
 896             printf("or %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
 897             free((LPVOID)buffer);
 898             break;
 899         }
 900     }
 901     //解释ADC
 902     void MeanAdc(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 903     {
 904         LPCSTR buffer;
 905         switch (HardCode[Index])
 906         {
 907         case 0x10:
 908             buffer = ReadModRM(HardCode, Mod, RM);
 909             printf("adc byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 910             free((LPVOID)buffer);
 911             break;
 912         case 0x11:
 913             buffer = ReadModRM(HardCode, Mod, RM);
 914             printf("adc dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 915             free((LPVOID)buffer);
 916             break;
 917         case 0x12:
 918             buffer = ReadModRM(HardCode, Mod, RM);
 919             printf("adc %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
 920             free((LPVOID)buffer);
 921             break;
 922         case 0x13:
 923             buffer = ReadModRM(HardCode, Mod, RM);
 924             printf("adc %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
 925             free((LPVOID)buffer);
 926             break;
 927         }
 928     }
 929     void MeanSbb(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 930     {
 931         LPCSTR buffer;
 932         switch (HardCode[Index])
 933         {
 934         case 0x18:
 935             buffer = ReadModRM(HardCode, Mod, RM);
 936             printf("sbb byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 937             free((LPVOID)buffer);
 938             break;
 939         case 0x19:
 940             buffer = ReadModRM(HardCode, Mod, RM);
 941             printf("sbb dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 942             free((LPVOID)buffer);
 943             break;
 944         case 0x1A:
 945             buffer = ReadModRM(HardCode, Mod, RM);
 946             printf("sbb %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
 947             free((LPVOID)buffer);
 948             break;
 949         case 0x1B:
 950             buffer = ReadModRM(HardCode, Mod, RM);
 951             printf("sbb %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
 952             free((LPVOID)buffer);
 953             break;
 954         }
 955     }
 956     void MeanAnd(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 957     {
 958         LPCSTR buffer;
 959         switch (HardCode[Index])
 960         {
 961         case 0x20:
 962             buffer = ReadModRM(HardCode, Mod, RM);
 963             printf("and byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 964             free((LPVOID)buffer);
 965             break;
 966         case 0x21:
 967             buffer = ReadModRM(HardCode, Mod, RM);
 968             printf("and dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 969             free((LPVOID)buffer);
 970             break;
 971         case 0x22:
 972             buffer = ReadModRM(HardCode, Mod, RM);
 973             printf("and %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
 974             free((LPVOID)buffer);
 975             break;
 976         case 0x23:
 977             buffer = ReadModRM(HardCode, Mod, RM);
 978             printf("and %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
 979             free((LPVOID)buffer);
 980             break;
 981         }
 982     }
 983     void MeanSub(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
 984     {
 985         LPCSTR buffer;
 986         switch (HardCode[Index])
 987         {
 988         case 0x28:
 989             buffer = ReadModRM(HardCode, Mod, RM);
 990             printf("sub byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
 991             free((LPVOID)buffer);
 992             break;
 993         case 0x29:
 994             buffer = ReadModRM(HardCode, Mod, RM);
 995             printf("sub dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
 996             free((LPVOID)buffer);
 997             break;
 998         case 0x2A:
 999             buffer = ReadModRM(HardCode, Mod, RM);
1000             printf("sub %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
1001             free((LPVOID)buffer);
1002             break;
1003         case 0x2B:
1004             buffer = ReadModRM(HardCode, Mod, RM);
1005             printf("sub %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
1006             free((LPVOID)buffer);
1007             break;
1008         }
1009     }
1010     void MeanXor(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
1011     {
1012         LPCSTR buffer;
1013         switch (HardCode[Index])
1014         {
1015         case 0x30:
1016             buffer = ReadModRM(HardCode, Mod, RM);
1017             printf("xor byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
1018             free((LPVOID)buffer);
1019             break;
1020         case 0x31:
1021             buffer = ReadModRM(HardCode, Mod, RM);
1022             printf("xor dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
1023             free((LPVOID)buffer);
1024             break;
1025         case 0x32:
1026             buffer = ReadModRM(HardCode, Mod, RM);
1027             printf("xor %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
1028             free((LPVOID)buffer);
1029             break;
1030         case 0x33:
1031             buffer = ReadModRM(HardCode, Mod, RM);
1032             printf("xor %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
1033             free((LPVOID)buffer);
1034             break;
1035         }
1036     }
1037     void MeanCmp(const LPBYTE HardCode, DWORD Mod, DWORD RM, DWORD Reg)
1038     {
1039         LPCSTR buffer;
1040         switch (HardCode[Index])
1041         {
1042         case 0x38:
1043             buffer = ReadModRM(HardCode, Mod, RM);
1044             printf("cmp byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
1045             free((LPVOID)buffer);
1046             break;
1047         case 0x39:
1048             buffer = ReadModRM(HardCode, Mod, RM);
1049             printf("cmp dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
1050             free((LPVOID)buffer);
1051             break;
1052         case 0x3A:
1053             buffer = ReadModRM(HardCode, Mod, RM);
1054             printf("cmp %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
1055             free((LPVOID)buffer);
1056             break;
1057         case 0x3B:
1058             buffer = ReadModRM(HardCode, Mod, RM);
1059             printf("cmp %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
1060             free((LPVOID)buffer);
1061             break;
1062         }
1063     }
1064     //解释Mov
1065     void MeanMov(const LPBYTE HardCode,DWORD Mod,DWORD RM,DWORD Reg)
1066     {
1067         LPCSTR buffer;
1068         switch (HardCode[Index])
1069         {
1070         case 0x88:
1071             buffer = ReadModRM(HardCode, Mod, RM);
1072             printf("mov byte ptr ""%s"",%s\n", buffer, ReadRegX8(Reg));
1073             free((LPVOID)buffer);
1074             break;
1075         case 0x89:
1076             buffer = ReadModRM(HardCode, Mod, RM);
1077             printf("mov dword ptr ""%s"",%s\n", buffer, ReadRegX32(Reg));
1078             free((LPVOID)buffer);
1079             break;
1080         case 0x8A:
1081             buffer = ReadModRM(HardCode, Mod, RM);
1082             printf("mov %s,byte ptr ""%s\n", ReadRegX8(Reg), buffer);
1083             free((LPVOID)buffer);
1084             break;
1085         case 0x8B:
1086             buffer = ReadModRM(HardCode, Mod, RM);
1087             printf("mov %s,dword ptr ""%s\n", ReadRegX32(Reg), buffer);
1088             free((LPVOID)buffer);
1089             break;
1090         }
1091     }
1092 
1093 };
1094 class TestPrintIns
1095 {
1096 public:
1097     void TestIns()
1098     {
1099         PrintIns hcTest;
1100         LPBYTE BigBuffer = (LPBYTE)malloc(0x1000);
1101         memset(BigBuffer, 0, 0x1000);
1102         BYTE HardCode[] = { 0xB2,0x45,0x54 ,0xb8,0x56,0x12,0x45,0x36,0x90,0x96,0xb3,0x12
1103         ,0x0F,0x82,0x12,0x34,0x56,0x78,0xE0,0x50,
1104         0xC2,0x12,0xc3,0x23,0x23,
1105         0x88,0x01,0x89,0x03,0x8A,0x07,0x8B,0x26,
1106         0x8b,0x66,0x12
1107         ,0x89,0x2c,0x14,0x89,0xAC,0x15,0x12,0x34,0x56,0x78,0x89,0x2c,0x15,
1108         0x88,0x15,0x12,0x45,0x56,0x78,
1109         0x00,0x0F,0x00,0x3D,0x60,0x42,0x43,0x00,
1110         0x08,0xAC,0xD2,0x43,0x00,0x00,0x0F,0x11,0x2C,0x01,0x1B,0xAC,0x45,0x00,0x00,0x12,0x34,
1111         0x22,0x3c,0xd0,0x2B,0xAC,0x83,0x12,0x34,0x56,0x78,0x33,0xac,0x5e,0x12,0x34,0x56,0x78,0x3b,0x56,0x18};
1112         memcpy(BigBuffer, HardCode, sizeof(HardCode));
1113         hcTest.CallDisasmEngine(BigBuffer, sizeof(HardCode));
1114     }
1115 
1116 };
1117 int main()
1118 {
1119     TestPrintIns Test;
1120     Test.TestIns();
1121     
1122 }
运行是这样
偏移和硬编码都没写，基本的反汇编翻译功能是有了。
posted @ 2021-04-15 17:52 Punished 阅读(469) 评论(0) 编辑收藏举报
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