msdos/interrupts.c

   1 /*
   2  * Interrupt vectors emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <sys/types.h>
  22 #include "windef.h"
  23 #include "wine/winbase16.h"
  24 #include "miscemu.h"
  25 #include "msdos.h"
  26 #include "module.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(int);
  30
  31 static FARPROC16 INT_Vectors[256];
  32
  33 /* Ordinal number for interrupt 0 handler in WPROCS.DLL */
  34 #define FIRST_INTERRUPT 100
  35
  36
  37 /**********************************************************************
  38  *          INT_GetPMHandler
  39  *
  40  * Return the protected mode interrupt vector for a given interrupt.
  41  */
  42 FARPROC16 INT_GetPMHandler( BYTE intnum )
  43 {
  44     if (!INT_Vectors[intnum])
  45     {
  46         static HMODULE16 wprocs;
  47         if (!wprocs)
  48         {
  49             if (((wprocs = GetModuleHandle16( "wprocs" )) < 32) &&
  50                 ((wprocs = LoadLibrary16( "wprocs" )) < 32))
  51             {
  52                 ERR("could not load wprocs.dll\n");
  53                 return 0;
  54             }
  55         }
  56         if (!(INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + intnum))))
  57         {
  58             WARN("int%x not implemented, returning dummy handler\n", intnum );
  59             INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + 256) );
  60         }
  61     }
  62     return INT_Vectors[intnum];
  63 }
  64
  65
  66 /**********************************************************************
  67  *          INT_SetPMHandler
  68  *
  69  * Set the protected mode interrupt handler for a given interrupt.
  70  */
  71 void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
  72 {
  73     TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
  74                  intnum, HIWORD(handler), LOWORD(handler) );
  75     INT_Vectors[intnum] = handler;
  76 }
  77
  78
  79 /**********************************************************************
  80  *         INT_DefaultHandler (WPROCS.356)
  81  *
  82  * Default interrupt handler.
  83  */
  84 void WINAPI INT_DefaultHandler( CONTEXT86 *context )
  85 {
  86 }