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())[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())[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 INT_GetRMHandler(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         INT_SetRMHandler(intnum, handler);
 107     else
 108         INT_SetPMHandler(intnum, handler);
 109 }
 110
 111
 112 /**********************************************************************
 113  *          INT_RealModeInterrupt
 114  *
 115  * Handle real mode interrupts
 116  */
 117 int INT_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
 118 {
 119     /* we should really map to if1632/wprocs.spec, but not all
 120      * interrupt handlers are adapted to support real mode yet */
 121     switch (intnum) {
 122         case 0x09:
 123             INT_Int09Handler(context);
 124             break;
 125         case 0x10:
 126             INT_Int10Handler(context);
 127             break;
 128         case 0x11:
 129             INT_Int11Handler(context);
 130             break;
 131         case 0x12:
 132             INT_Int12Handler(context);
 133             break;
 134         case 0x13:
 135             INT_Int13Handler(context);
 136             break;
 137         case 0x15:
 138             INT_Int15Handler(context);
 139             break;
 140         case 0x16:
 141             INT_Int16Handler(context);
 142             break;
 143         case 0x17:
 144             INT_Int17Handler(context);
 145             break;
 146         case 0x1a:
 147             INT_Int1aHandler(context);
 148             break;
 149         case 0x20:
 150             INT_Int20Handler(context);
 151             break;
 152         case 0x21:
 153             DOS3Call(context);
 154             break;
 155         case 0x25:
 156             INT_Int25Handler(context);
 157             break;
 158         case 0x29:
 159             INT_Int29Handler(context);
 160             break;
 161         case 0x2a:
 162             INT_Int2aHandler(context);
 163             break;
 164         case 0x2f:
 165             INT_Int2fHandler(context);
 166             break;
 167         case 0x31:
 168             INT_Int31Handler(context);
 169             break;
 170         case 0x33:
 171             INT_Int33Handler(context);
 172             break;
 173         default:
 174             FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
 175             return 1;
 176     }
 177     return 0;
 178 }