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bottomy

Stage 2 VM (logging)

bottomy
Sep 10th, 2012
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  1. /*
  2. http://www.hackforums.net/showthread.php?tid=1971988&pid=17935062#pid17935062
  3. */
  4.  
  5. /* With Logging */
  6. #include <stdio.h>
  7. #include <stdlib.h>
  8.  
  9.  
  10. void jmp(const char, const int, const int);
  11. void movr(const char, const int, const int);
  12. void movm(const char, const int, const int);
  13. void add(const char, const int, const int);
  14. void xor(const char, const int, const int);
  15. void cmp(const char, const int, const int);
  16. void jmpe(const char, const int, const int);
  17. void hlt(const char, const int, const int);
  18.  
  19.  
  20. const char *GetRegister(const char);
  21.  
  22. void (*Instruction[])(const char, const int, const int) = {
  23.     jmp, movr, movm, add, xor, cmp, jmpe, hlt
  24. };
  25.  
  26. enum {
  27.     REG_r0, REG_r1, REG_r2, REG_r3,
  28.     REG_cs, REG_ds,
  29.     REG_fl, REG_ip,
  30.     REG_Total
  31. };
  32.  
  33. int Registers[REG_Total] = { 0, 0, 0, 0, 0, 0x10, 0, 0 };
  34.  
  35. char Mem[] = {
  36.     0x31, 0x04, 0x33, 0xaa, 0x40, 0x02, 0x80, 0x03, 0x52, 0x00, 0x72, 0x01, 0x73, 0x01, 0xb2, 0x50,
  37.     0x30, 0x14, 0xc0, 0x01, 0x80, 0x00, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  38.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  39.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  40.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  41.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  42.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  43.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  44.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  45.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  46.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  47.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  48.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  49.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  50.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  51.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  52.    
  53.     0x98, 0xab, 0xd9, 0xa1, 0x9f, 0xa7, 0x83, 0x83, 0xf2, 0xb1, 0x34, 0xb6, 0xe4, 0xb7, 0xca, 0xb8,
  54.     0xc9, 0xb8, 0x0e, 0xbd, 0x7d, 0x0f, 0xc0, 0xf1, 0xd9, 0x03, 0xc5, 0x3a, 0xc6, 0xc7, 0xc8, 0xc9,
  55.     0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,
  56.     0xda, 0xdb, 0xa9, 0xcd, 0xdf, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
  57.     0x26, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
  58.     0x7d, 0x1f, 0x15, 0x60, 0x4d, 0x4d, 0x52, 0x7d, 0x0e, 0x27, 0x6d, 0x10, 0x6d, 0x5a, 0x06, 0x56,
  59.     0x47, 0x14, 0x42, 0x0e, 0xb6, 0xb2, 0xb2, 0xe6, 0xeb, 0xb4, 0x83, 0x8e, 0xd7, 0xe5, 0xd4, 0xd9,
  60.     0xc3, 0xf0, 0x80, 0x95, 0xf1, 0x82, 0x82, 0x9a, 0xbd, 0x95, 0xa4, 0x8d, 0x9a, 0x2b, 0x30, 0x69,
  61.     0x4a, 0x69, 0x65, 0x55, 0x1c, 0x7b, 0x69, 0x1c, 0x6e, 0x04, 0x74, 0x35, 0x21, 0x26, 0x2f, 0x60,
  62.     0x03, 0x4e, 0x37, 0x1e, 0x33, 0x54, 0x39, 0xe6, 0xba, 0xb4, 0xa2, 0xad, 0xa4, 0xc5, 0x95, 0xc8,
  63.     0xc1, 0xe4, 0x8a, 0xec, 0xe7, 0x92, 0x8b, 0xe8, 0x81, 0xf0, 0xad, 0x98, 0xa4, 0xd0, 0xc0, 0x8d,
  64.     0xac, 0x22, 0x52, 0x65, 0x7e, 0x27, 0x2b, 0x5a, 0x12, 0x61, 0x0a, 0x01, 0x7a, 0x6b, 0x1d, 0x67,
  65.     0x75, 0x70, 0x6c, 0x1b, 0x11, 0x25, 0x25, 0x70, 0x7f, 0x7e, 0x67, 0x63, 0x30, 0x3c, 0x6d, 0x6a,
  66.     0x01, 0x51, 0x59, 0x5f, 0x56, 0x13, 0x10, 0x43, 0x19, 0x18, 0xe5, 0xe0, 0xbe, 0xbf, 0xbd, 0xe9,
  67.     0xf0, 0xf1, 0xf9, 0xfa, 0xab, 0x8f, 0xc1, 0xdf, 0xcf, 0x8d, 0xf8, 0xe7, 0xe2, 0xe9, 0x93, 0x8e,
  68.     0xec, 0xf5, 0xc8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  69.    
  70.     0x37, 0x7a, 0x07, 0x11, 0x1f, 0x1d, 0x68, 0x25, 0x32, 0x77, 0x1e, 0x62, 0x23, 0x5b, 0x47, 0x55,
  71.     0x53, 0x30, 0x11, 0x42, 0xf6, 0xf1, 0xb1, 0xe6, 0xc3, 0xcc, 0xf8, 0xc5, 0xe4, 0xcc, 0xc0, 0xd3,
  72.     0x85, 0xfd, 0x9a, 0xe3, 0xe6, 0x81, 0xb5, 0xbb, 0xd7, 0xcd, 0x87, 0xa3, 0xd3, 0x6b, 0x36, 0x6f,
  73.     0x6f, 0x66, 0x55, 0x30, 0x16, 0x45, 0x5e, 0x09, 0x74, 0x5c, 0x3f, 0x29, 0x2b, 0x66, 0x3d, 0x0d,
  74.     0x02, 0x30, 0x28, 0x35, 0x15, 0x09, 0x15, 0xdd, 0xec, 0xb8, 0xe2, 0xfb, 0xd8, 0xcb, 0xd8, 0xd1,
  75.     0x8b, 0xd5, 0x82, 0xd9, 0x9a, 0xf1, 0x92, 0xab, 0xe8, 0xa6, 0xd6, 0xd0, 0x8c, 0xaa, 0xd2, 0x94,
  76.     0xcf, 0x45, 0x46, 0x67, 0x20, 0x7d, 0x44, 0x14, 0x6b, 0x45, 0x6d, 0x54, 0x03, 0x17, 0x60, 0x62,
  77.     0x55, 0x5a, 0x4a, 0x66, 0x61, 0x11, 0x57, 0x68, 0x75, 0x05, 0x62, 0x36, 0x7d, 0x02, 0x10, 0x4b,
  78.     0x08, 0x22, 0x42, 0x32, 0xba, 0xe2, 0xb9, 0xe2, 0xd6, 0xb9, 0xff, 0xc3, 0xe9, 0x8a, 0x8f, 0xc1,
  79.     0x8f, 0xe1, 0xb8, 0xa4, 0x96, 0xf1, 0x8f, 0x81, 0xb1, 0x8d, 0x89, 0xcc, 0xd4, 0x78, 0x76, 0x61,
  80.     0x72, 0x3e, 0x37, 0x23, 0x56, 0x73, 0x71, 0x79, 0x63, 0x7c, 0x08, 0x11, 0x20, 0x69, 0x7a, 0x14,
  81.     0x68, 0x05, 0x21, 0x1e, 0x32, 0x27, 0x59, 0xb7, 0xcf, 0xab, 0xdd, 0xd5, 0xcc, 0x97, 0x93, 0xf2,
  82.     0xe7, 0xc0, 0xeb, 0xff, 0xe9, 0xa3, 0xbf, 0xa1, 0xab, 0x8b, 0xbb, 0x9e, 0x9e, 0x8c, 0xa0, 0xc1,
  83.     0x9b, 0x5a, 0x2f, 0x2f, 0x4e, 0x4e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  84.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  85.     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  86. };
  87.  
  88. int main(int argc, const char *argv[])
  89. {
  90.     for ( ; ; )
  91.     {
  92.         const char Val = Mem[Registers[REG_ip]];
  93.         char OpCode = (Val >> 5) & 7, Mod = (Val >> 4) & 1, Op1 = Val & 7, Op2 = Mem[Registers[REG_ip] + 1];
  94.        
  95.         printf("%3d: ", Registers[REG_ip]);
  96.         Instruction[(int)OpCode](Mod, Op1, Op2);
  97.     }
  98.    
  99.     return 0;
  100. }
  101.  
  102. void jmp(const char mod, const int op1, const int op2)
  103. {
  104.     if (mod)
  105.     {
  106.         printf("%d : %d\n", op1, op2);
  107.         printf("jmp %d:%s\t\t\t{ ip = %d -> ip = %d }\n", op2, GetRegister(op1),
  108.                Registers[REG_ip], (op2 * 16) + Registers[op1]);
  109.         Registers[REG_ip] = (op2 * 16) + Registers[op1];
  110.         Registers[REG_cs] = op2;
  111.     }
  112.    
  113.     else
  114.     {
  115.         printf("jmp %s\t\t\t{ ip = %d -> ip = %d }\n", GetRegister(op1),
  116.                Registers[REG_ip], (Registers[REG_cs] * 16) + Registers[op1]);
  117.         Registers[REG_ip] = (Registers[REG_cs] * 16) + Registers[op1];
  118.     }
  119. }
  120.  
  121. void movr(const char mod, const int op1, const int op2)
  122. {
  123.     if (mod)
  124.     {
  125.         printf("movr %s,%d\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), op2,
  126.                GetRegister(op1), Registers[op1], GetRegister(op1), op2);
  127.         Registers[op1] = op2;
  128.     }
  129.    
  130.     else
  131.     {
  132.         printf("movr %s,%s\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), GetRegister(op2),
  133.                GetRegister(op1), Registers[op1], GetRegister(op1), Registers[op2]);
  134.         Registers[op1] = Registers[op2];
  135.     }
  136.    
  137.     Registers[REG_ip] += 2;
  138. }
  139.  
  140. void movm(const char mod, const int op1, const int op2)
  141. {
  142.     if (mod)
  143.     {
  144.         printf("movm [ds:%s],%s\t\t\t{ [%d] = %d -> [%d] = %d }\n", GetRegister(op1), GetRegister(op2),
  145.                (Registers[REG_ds] * 16) + Registers[op1], Mem[(Registers[REG_ds] * 16) + Registers[op1]], (Registers[REG_ds] * 16) + Registers[op1], Registers[op2]);
  146.         Mem[(Registers[REG_ds] * 16) + Registers[op1]] = Registers[op2];
  147.     }
  148.    
  149.     else
  150.     {
  151.         printf("movm %s,[ds:%s]\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), GetRegister(op2),
  152.                GetRegister(op1), Registers[op1], GetRegister(op1), Mem[(Registers[REG_ds] * 16) + Registers[op2]]);
  153.         Registers[op1] = Mem[(Registers[REG_ds] * 16) + Registers[op2]];
  154.     }
  155.    
  156.     Registers[REG_ip] += 2;
  157. }
  158.  
  159. void add(const char mod, const int op1, const int op2)
  160. {
  161.     if (mod)
  162.     {
  163.         printf("add %s,%d\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), op2,
  164.                GetRegister(op1), Registers[op1], GetRegister(op1), Registers[op1] + op2);
  165.         Registers[op1] += op2;
  166.     }
  167.    
  168.     else
  169.     {
  170.         printf("add %s,%s\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), GetRegister(op2),
  171.                GetRegister(op1), Registers[op1], GetRegister(op1), Registers[op1] + Registers[op2]);
  172.         Registers[op1] += Registers[op2];
  173.     }
  174.    
  175.     Registers[REG_ip] += 2;
  176. }
  177.  
  178. void xor(const char mod, const int op1, const int op2)
  179. {
  180.     if (mod)
  181.     {
  182.         printf("xor %s,%d\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), op2,
  183.                GetRegister(op1), Registers[op1], GetRegister(op1), Registers[op1] ^ op2);
  184.         Registers[op1] ^= op2;
  185.     }
  186.    
  187.     else
  188.     {
  189.         printf("xor %s,%s\t\t\t{ %s = %d -> %s = %d }\n", GetRegister(op1), GetRegister(op2),
  190.                GetRegister(op1), Registers[op1], GetRegister(op1), Registers[op1] ^ Registers[op2]);
  191.         Registers[op1] ^= Registers[op2];
  192.     }
  193.    
  194.     Registers[REG_ip] += 2;
  195. }
  196.  
  197. void cmp(const char mod, const int op1, const int op2)
  198. {
  199.     char a, b;
  200.     if (mod)
  201.     {
  202.         printf("cmp %s,%d", GetRegister(op1), op2);
  203.         a = Registers[op1];
  204.         b = op2;
  205.     }
  206.    
  207.     else
  208.     {
  209.         printf("cmp %s,%s", GetRegister(op1), GetRegister(op2));
  210.         a = Registers[op1];
  211.         b = Registers[op2];
  212.     }
  213.    
  214.     if (a == b) Registers[REG_fl] = 0;
  215.     else if (a < b) Registers[REG_fl] = 0xff;
  216.     else if (a > b) Registers[REG_fl] = 1;
  217.    
  218.     printf("\t\t\t{ cmp %d,%d -> fl = %d }\n", a, b, Registers[REG_fl]);
  219.    
  220.     Registers[REG_ip] += 2;
  221. }
  222.  
  223. void jmpe(const char mod, const int op1, const int op2)
  224. {
  225.     if (mod)
  226.     {
  227.         printf("jmpe %s:%s [%s", GetRegister(op2), GetRegister(op1), Registers[REG_fl] == 0? "taken] -> " : "not taken]\n");
  228.     }
  229.    
  230.     else
  231.     {
  232.         printf("jmpe %s [%s", GetRegister(op1), Registers[REG_fl] == 0? "taken] -> " : "not taken]\n");
  233.     }
  234.    
  235.     if (Registers[REG_fl] == 0) jmp(mod, op1, op2);
  236.     else Registers[REG_ip] += 1 + mod;
  237. }
  238.  
  239. void hlt(const char mod, const int op1, const int op2)
  240. {
  241.     printf("Halted, should output memory to file!\n");
  242.    
  243.     FILE *fp = fopen("iuenv31eEmOoe3434134urchqe54ucnDFmkd3ofun3c9nrv13ic3ir.txt", "wb");
  244.    
  245.     if (fp)
  246.     {
  247.         fwrite(Mem, sizeof(Mem), 1, fp);
  248.         fclose(fp);
  249.     }
  250.    
  251.     exit(0);
  252. }
  253.  
  254. const char *GetRegister(const char Index)
  255. {
  256.     const char *Name;
  257.     switch (Index)
  258.     {
  259.         case REG_ip:
  260.             Name = "ip";
  261.             break;
  262.            
  263.         case REG_r0:
  264.             Name = "r0";
  265.             break;
  266.            
  267.         case REG_r1:
  268.             Name = "r1";
  269.             break;
  270.            
  271.         case REG_r2:
  272.             Name = "r2";
  273.             break;
  274.            
  275.         case REG_r3:
  276.             Name = "r3";
  277.             break;
  278.            
  279.         case REG_cs:
  280.             Name = "cs";
  281.             break;
  282.            
  283.         case REG_ds:
  284.             Name = "ds";
  285.             break;
  286.            
  287.         case REG_fl:
  288.             Name = "fl";
  289.             break;
  290.            
  291.         default:
  292.             Name = "Invalid Reg";
  293.             break;
  294.     }
  295.    
  296.     return Name;
  297. }
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