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_GetRMHandler
  67  *
  68  * Return the real mode interrupt vector for a given interrupt.
  69  */
  70 FARPROC16 INT_GetRMHandler( BYTE intnum )
  71 {
  72     return ((FARPROC16*)DOSMEM_SystemBase())[intnum];
  73 }
  74
  75
  76 /**********************************************************************
  77  *          INT_SetRMHandler
  78  *
  79  * Set the real mode interrupt handler for a given interrupt.
  80  */
  81 void INT_SetRMHandler( BYTE intnum, FARPROC16 handler )
  82 {
  83     TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
  84                  intnum, HIWORD(handler), LOWORD(handler) );
  85     ((FARPROC16*)DOSMEM_SystemBase())[intnum] = handler;
  86 }
  87
  88
  89 /**********************************************************************
  90  *          INT_CtxGetHandler
  91  *
  92  * Return the interrupt vector for a given interrupt.
  93  */
  94 FARPROC16 INT_CtxGetHandler( CONTEXT86 *context, BYTE intnum )
  95 {
  96     if (ISV86(context))
  97         return INT_GetRMHandler(intnum);
  98     else
  99         return INT_GetPMHandler(intnum);
 100 }
 101
 102
 103 /**********************************************************************
 104  *          INT_CtxSetHandler
 105  *
 106  * Set the interrupt handler for a given interrupt.
 107  */
 108 void INT_CtxSetHandler( CONTEXT86 *context, BYTE intnum, FARPROC16 handler )
 109 {
 110     if (ISV86(context))
 111         INT_SetRMHandler(intnum, handler);
 112     else
 113         INT_SetPMHandler(intnum, handler);
 114 }
 115
 116
 117 /**********************************************************************
 118  *          INT_RealModeInterrupt
 119  *
 120  * Handle real mode interrupts
 121  */
 122 int INT_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
 123 {
 124     /* we should really map to if1632/wprocs.spec, but not all
 125      * interrupt handlers are adapted to support real mode yet */
 126     switch (intnum) {
 127         case 0x09:
 128             INT_Int09Handler(context);
 129             break;
 130         case 0x10:
 131             INT_Int10Handler(context);
 132             break;
 133         case 0x11:
 134             INT_Int11Handler(context);
 135             break;
 136         case 0x12:
 137             INT_Int12Handler(context);
 138             break;
 139         case 0x13:
 140             INT_Int13Handler(context);
 141             break;
 142         case 0x15:
 143             INT_Int15Handler(context);
 144             break;
 145         case 0x16:
 146             INT_Int16Handler(context);
 147             break;
 148         case 0x17:
 149             INT_Int17Handler(context);
 150             break;
 151         case 0x1a:
 152             INT_Int1aHandler(context);
 153             break;
 154         case 0x20:
 155             INT_Int20Handler(context);
 156             break;
 157         case 0x21:
 158             DOS3Call(context);
 159             break;
 160         case 0x25:
 161             INT_Int25Handler(context);
 162             break;
 163         case 0x29:
 164             INT_Int29Handler(context);
 165             break;
 166         case 0x2a:
 167             INT_Int2aHandler(context);
 168             break;
 169         case 0x2f:
 170             INT_Int2fHandler(context);
 171             break;
 172         case 0x31:
 173             INT_Int31Handler(context);
 174             break;
 175         case 0x33:
 176             INT_Int33Handler(context);
 177             break;
 178         default:
 179             FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
 180             return 1;
 181     }
 182     return 0;
 183 }
 184
 185
 186 /**********************************************************************
 187  *         INT_DefaultHandler
 188  *
 189  * Default interrupt handler.
 190  */
 191 void WINAPI INT_DefaultHandler( CONTEXT86 *context )
 192 {
 193 }