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 "miscemu.h"
  10 #include "msdos.h"
  11 #include "debugtools.h"
  12
  13 DEFAULT_DEBUG_CHANNEL(int)
  14
  15 static FARPROC16 INT_Vectors[256];
  16
  17
  18 /**********************************************************************
  19  *          INT_GetPMHandler
  20  *
  21  * Return the protected mode interrupt vector for a given interrupt.
  22  */
  23 FARPROC16 INT_GetPMHandler( BYTE intnum )
  24 {
  25     return INT_Vectors[intnum];
  26 }
  27
  28
  29 /**********************************************************************
  30  *          INT_SetPMHandler
  31  *
  32  * Set the protected mode interrupt handler for a given interrupt.
  33  */
  34 void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
  35 {
  36     TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
  37                  intnum, HIWORD(handler), LOWORD(handler) );
  38     INT_Vectors[intnum] = handler;
  39 }
  40
  41
  42 /**********************************************************************
  43  *          INT_GetRMHandler
  44  *
  45  * Return the real mode interrupt vector for a given interrupt.
  46  */
  47 FARPROC16 INT_GetRMHandler( BYTE intnum )
  48 {
  49     return ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum];
  50 }
  51
  52
  53 /**********************************************************************
  54  *          INT_SetRMHandler
  55  *
  56  * Set the real mode interrupt handler for a given interrupt.
  57  */
  58 void INT_SetRMHandler( BYTE intnum, FARPROC16 handler )
  59 {
  60     TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
  61                  intnum, HIWORD(handler), LOWORD(handler) );
  62     ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum] = handler;
  63 }
  64
  65
  66 /**********************************************************************
  67  *          INT_CtxGetHandler
  68  *
  69  * Return the interrupt vector for a given interrupt.
  70  */
  71 FARPROC16 INT_CtxGetHandler( CONTEXT86 *context, BYTE intnum )
  72 {
  73     if (ISV86(context))
  74         return ((FARPROC16*)V86BASE(context))[intnum];
  75     else
  76         return INT_GetPMHandler(intnum);
  77 }
  78
  79
  80 /**********************************************************************
  81  *          INT_CtxSetHandler
  82  *
  83  * Set the interrupt handler for a given interrupt.
  84  */
  85 void INT_CtxSetHandler( CONTEXT86 *context, BYTE intnum, FARPROC16 handler )
  86 {
  87     if (ISV86(context)) {
  88         TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
  89                      intnum, HIWORD(handler), LOWORD(handler) );
  90         ((FARPROC16*)V86BASE(context))[intnum] = handler;
  91     } else
  92         INT_SetPMHandler(intnum, handler);
  93 }
  94
  95
  96 /**********************************************************************
  97  *          INT_RealModeInterrupt
  98  *
  99  * Handle real mode interrupts
 100  */
 101 int INT_RealModeInterrupt( BYTE intnum, CONTEXT86 *context )
 102 {
 103     /* we should really map to if1632/wprocs.spec, but not all
 104      * interrupt handlers are adapted to support real mode yet */
 105     switch (intnum) {
 106         case 0x09:
 107             INT_Int09Handler(context);
 108             break;
 109         case 0x10:
 110             INT_Int10Handler(context);
 111             break;
 112         case 0x11:
 113             INT_Int11Handler(context);
 114             break;
 115         case 0x12:
 116             INT_Int12Handler(context);
 117             break;
 118         case 0x13:
 119             INT_Int13Handler(context);
 120             break;
 121         case 0x15:
 122             INT_Int15Handler(context);
 123             break;
 124         case 0x16:
 125             INT_Int16Handler(context);
 126             break;
 127         case 0x17:
 128             INT_Int17Handler(context);
 129             break;
 130         case 0x1a:
 131             INT_Int1aHandler(context);
 132             break;
 133         case 0x20:
 134             INT_Int20Handler(context);
 135             break;
 136         case 0x21:
 137             DOS3Call(context);
 138             break;
 139         case 0x25:
 140             INT_Int25Handler(context);
 141             break;
 142         case 0x29:
 143             INT_Int29Handler(context);
 144             break;
 145         case 0x2f:
 146             INT_Int2fHandler(context);
 147             break;
 148         case 0x31:
 149             INT_Int31Handler(context);
 150             break;
 151         case 0x33:
 152             INT_Int33Handler(context);
 153             break;
 154         default:
 155             FIXME("Unknown Interrupt in DOS mode: 0x%x\n", intnum);
 156             return 1;
 157     }
 158     return 0;
 159 }