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             {
  37                 ERR("could not load wprocs.dll\n");
  38                 return 0;
  39             }
  40         }
  41         INT_Vectors[intnum] = NE_GetEntryPoint( wprocs, FIRST_INTERRUPT + intnum );
  42     }
  43     return INT_Vectors[intnum];
  44 }
  45
  46
  47 /**********************************************************************
  48  *          INT_SetPMHandler
  49  *
  50  * Set the protected mode interrupt handler for a given interrupt.
  51  */
  52 void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
  53 {
  54     TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
  55                  intnum, HIWORD(handler), LOWORD(handler) );
  56     INT_Vectors[intnum] = handler;
  57 }
  58
  59
  60 /**********************************************************************
  61  *          INT_GetRMHandler
  62  *
  63  * Return the real mode interrupt vector for a given interrupt.
  64  */
  65 FARPROC16 INT_GetRMHandler( BYTE intnum )
  66 {
  67     return ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum];
  68 }
  69
  70
  71 /**********************************************************************
  72  *          INT_SetRMHandler
  73  *
  74  * Set the real mode interrupt handler for a given interrupt.
  75  */
  76 void INT_SetRMHandler( BYTE intnum, FARPROC16 handler )
  77 {
  78     TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
  79                  intnum, HIWORD(handler), LOWORD(handler) );
  80     ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum] = handler;
  81 }
  82
  83
  84 /**********************************************************************
  85  *          INT_CtxGetHandler
  86  *
  87  * Return the interrupt vector for a given interrupt.
  88  */
  89 FARPROC16 INT_CtxGetHandler( CONTEXT86 *context, BYTE intnum )
  90 {
  91     if (ISV86(context))
  92         return ((FARPROC16*)V86BASE(context))[intnum];
  93     else
  94         return INT_GetPMHandler(intnum);
  95 }
  96
  97
  98 /**********************************************************************
  99  *          INT_CtxSetHandler
 100  *
 101  * Set the interrupt handler for a given interrupt.
 102  */
 103 void INT_CtxSetHandler( CONTEXT86 *context, BYTE intnum, FARPROC16 handler )
 104 {
 105     if (ISV86(context)) {
 106         TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
 107                      intnum, HIWORD(handler), LOWORD(handler) );
 108         ((FARPROC16*)V86BASE(context))[intnum] = handler;
 109     } else
 110         INT_SetPMHandler(intnum, handler);
 111 }
 112
 113
 114 /**********************************************************************
 115  *          INT_RealModeInterrupt
 116  *
 117  * Handle real mode interrupts
 118  */
 119 int INT_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
 120 {
 121     /* we should really map to if1632/wprocs.spec, but not all
 122      * interrupt handlers are adapted to support real mode yet */
 123     switch (intnum) {
 124         case 0x09:
 125             INT_Int09Handler(context);
 126             break;
 127         case 0x10:
 128             INT_Int10Handler(context);
 129             break;
 130         case 0x11:
 131             INT_Int11Handler(context);
 132             break;
 133         case 0x12:
 134             INT_Int12Handler(context);
 135             break;
 136         case 0x13:
 137             INT_Int13Handler(context);
 138             break;
 139         case 0x15:
 140             INT_Int15Handler(context);
 141             break;
 142         case 0x16:
 143             INT_Int16Handler(context);
 144             break;
 145         case 0x17:
 146             INT_Int17Handler(context);
 147             break;
 148         case 0x1a:
 149             INT_Int1aHandler(context);
 150             break;
 151         case 0x20:
 152             INT_Int20Handler(context);
 153             break;
 154         case 0x21:
 155             DOS3Call(context);
 156             break;
 157         case 0x25:
 158             INT_Int25Handler(context);
 159             break;
 160         case 0x29:
 161             INT_Int29Handler(context);
 162             break;
 163         case 0x2a:
 164             INT_Int2aHandler(context);
 165             break;
 166         case 0x2f:
 167             INT_Int2fHandler(context);
 168             break;
 169         case 0x31:
 170             INT_Int31Handler(context);
 171             break;
 172         case 0x33:
 173             INT_Int33Handler(context);
 174             break;
 175         default:
 176             FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
 177             return 1;
 178     }
 179     return 0;
 180 }