msdos/interrupts.c

   1 /*
   2  * Interrupt vectors emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <sys/types.h>
   8 #include "windef.h"
   9 #include "wine/winbase16.h"
  10 #include "miscemu.h"
  11 #include "msdos.h"
  12 #include "module.h"
  13 #include "debugtools.h"
  14
  15 DEFAULT_DEBUG_CHANNEL(int);
  16
  17 static FARPROC16 INT_Vectors[256];
  18
  19 /* Ordinal number for interrupt 0 handler in WPROCS.DLL */
  20 #define FIRST_INTERRUPT 100
  21
  22
  23 /**********************************************************************
  24  *          INT_GetPMHandler
  25  *
  26  * Return the protected mode interrupt vector for a given interrupt.
  27  */
  28 FARPROC16 INT_GetPMHandler( BYTE intnum )
  29 {
  30     if (!INT_Vectors[intnum])
  31     {
  32         static HMODULE16 wprocs;
  33         if (!wprocs)
  34         {
  35             if (((wprocs = GetModuleHandle16( "wprocs" )) < 32) &&
  36                 ((wprocs = LoadLibrary16( "wprocs" )) < 32))
  37             {
  38                 ERR("could not load wprocs.dll\n");
  39                 return 0;
  40             }
  41         }
  42         if (!(INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + intnum))))
  43         {
  44             WARN("int%x not implemented, returning dummy handler\n", intnum );
  45             INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + 256) );
  46         }
  47     }
  48     return INT_Vectors[intnum];
  49 }
  50
  51
  52 /**********************************************************************
  53  *          INT_SetPMHandler
  54  *
  55  * Set the protected mode interrupt handler for a given interrupt.
  56  */
  57 void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
  58 {
  59     TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
  60                  intnum, HIWORD(handler), LOWORD(handler) );
  61     INT_Vectors[intnum] = handler;
  62 }
  63
  64
  65 /**********************************************************************
  66  *         INT_DefaultHandler (WPROCS.356)
  67  *
  68  * Default interrupt handler.
  69  */
  70 void WINAPI INT_DefaultHandler( CONTEXT86 *context )
  71 {
  72 }