subsystems/ntvdm/ntvdm.c

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            ntvdm.c
   5  * PURPOSE:         Virtual DOS Machine
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #include "ntvdm.h"
  10
  11 BOOLEAN VdmRunning = TRUE;
  12 LPVOID BaseAddress = NULL;
  13 LPCWSTR ExceptionName[] =
  14 {
  15     L"Division By Zero",
  16     L"Debug",
  17     L"Unexpected Error",
  18     L"Breakpoint",
  19     L"Integer Overflow",
  20     L"Bound Range Exceeded",
  21     L"Invalid Opcode",
  22     L"FPU Not Available"
  23 };
  24
  25 VOID DisplayMessage(LPCWSTR Format, ...)
  26 {
  27     WCHAR Buffer[256];
  28     va_list Parameters;
  29
  30     va_start(Parameters, Format);
  31     _vsnwprintf(Buffer, 256, Format, Parameters);
  32     MessageBox(NULL, Buffer, L"NTVDM Subsystem", MB_OK);
  33     va_end(Parameters);
  34 }
  35
  36 BOOL WINAPI ConsoleCtrlHandler(DWORD ControlType)
  37 {
  38     switch (ControlType)
  39     {
  40         case CTRL_C_EVENT:
  41         case CTRL_BREAK_EVENT:
  42         {
  43             /* Perform interrupt 0x23 */
  44             EmulatorInterrupt(0x23);
  45         }
  46         default:
  47         {
  48             /* Stop the VDM if the user logs out or closes the console */
  49             VdmRunning = FALSE;
  50         }
  51     }
  52     return TRUE;
  53 }
  54
  55 INT wmain(INT argc, WCHAR *argv[])
  56 {
  57     INT i;
  58     BOOLEAN PrintUsage = TRUE;
  59     CHAR CommandLine[128];
  60
  61     /* Set the handler routine */
  62     SetConsoleCtrlHandler(ConsoleCtrlHandler, TRUE);
  63
  64     /* Parse the command line arguments */
  65     for (i = 1; i < argc; i++)
  66     {
  67         if (argv[i][0] != L'-' && argv[i][0] != L'/') continue;
  68
  69         switch (argv[i][1])
  70         {
  71             case L'f':
  72             case L'F':
  73             {
  74                 if (argv[i+1] != NULL)
  75                 {
  76                     /* The DOS command line must be ASCII */
  77                     WideCharToMultiByte(CP_ACP, 0, argv[i+1], -1, CommandLine, 128, NULL, NULL);
  78
  79                     /* This is the only mandatory parameter */
  80                     PrintUsage = FALSE;
  81                 }
  82                 break;
  83             }
  84             default:
  85             {
  86                 wprintf(L"Unknown option: %s", argv[i]);
  87             }
  88         }
  89     }
  90
  91     if (PrintUsage)
  92     {
  93         wprintf(L"ReactOS Virtual DOS Machine\n\n");
  94         wprintf(L"Usage: NTVDM /F <PROGRAM>\n");
  95         return 0;
  96     }
  97
  98     if (!EmulatorInitialize()) return 1;
  99
 100     /* Initialize the system BIOS */
 101     if (!BiosInitialize())
 102     {
 103         wprintf(L"FATAL: Failed to initialize the VDM BIOS.\n");
 104         goto Cleanup;
 105     }
 106
 107     /* Initialize the VDM DOS kernel */
 108     if (!DosInitialize())
 109     {
 110         wprintf(L"FATAL: Failed to initialize the VDM DOS kernel.\n");
 111         goto Cleanup;
 112     }
 113
 114     /* Start the process from the command line */
 115     if (!DosCreateProcess(CommandLine, 0))
 116     {
 117         DisplayMessage(L"Could not start program: %S", CommandLine);
 118         return -1;
 119     }
 120
 121     /* Main loop */
 122     while (VdmRunning) EmulatorStep();
 123
 124 Cleanup:
 125     EmulatorCleanup();
 126
 127     return 0;
 128 }
 129
 130 /* EOF */