msdos/interrupts.c

   1 /*
   2  * Interrupt vectors emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <sys/types.h>
   8
   9 #include "windows.h"
  10 #include "drive.h"
  11 #include "miscemu.h"
  12 #include "msdos.h"
  13 #include "module.h"
  14 #include "stackframe.h"
  15 #include "debug.h"
  16
  17 static FARPROC16 INT_Vectors[256];
  18
  19
  20 /**********************************************************************
  21  *          INT_GetPMHandler
  22  *
  23  * Return the protected mode interrupt vector for a given interrupt.
  24  */
  25 FARPROC16 INT_GetPMHandler( BYTE intnum )
  26 {
  27     return INT_Vectors[intnum];
  28 }
  29
  30
  31 /**********************************************************************
  32  *          INT_SetPMHandler
  33  *
  34  * Set the protected mode interrupt handler for a given interrupt.
  35  */
  36 void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
  37 {
  38     TRACE(int, "Set protected mode interrupt vector %02x <- %04x:%04x\n",
  39                  intnum, HIWORD(handler), LOWORD(handler) );
  40     INT_Vectors[intnum] = handler;
  41 }
  42
  43
  44 /**********************************************************************
  45  *          INT_GetRMHandler
  46  *
  47  * Return the real mode interrupt vector for a given interrupt.
  48  */
  49 FARPROC16 INT_GetRMHandler( BYTE intnum )
  50 {
  51     return ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum];
  52 }
  53
  54
  55 /**********************************************************************
  56  *          INT_SetRMHandler
  57  *
  58  * Set the real mode interrupt handler for a given interrupt.
  59  */
  60 void INT_SetRMHandler( BYTE intnum, FARPROC16 handler )
  61 {
  62     TRACE(int, "Set real mode interrupt vector %02x <- %04x:%04x\n",
  63                  intnum, HIWORD(handler), LOWORD(handler) );
  64     ((FARPROC16*)DOSMEM_MemoryBase(0))[intnum] = handler;
  65 }
  66
  67
  68 /**********************************************************************
  69  *          INT_CtxGetHandler
  70  *
  71  * Return the interrupt vector for a given interrupt.
  72  */
  73 FARPROC16 INT_CtxGetHandler( CONTEXT *context, BYTE intnum )
  74 {
  75     if (ISV86(context))
  76         return ((FARPROC16*)V86BASE(context))[intnum];
  77     else
  78         return INT_GetPMHandler(intnum);
  79 }
  80
  81
  82 /**********************************************************************
  83  *          INT_CtxSetHandler
  84  *
  85  * Set the interrupt handler for a given interrupt.
  86  */
  87 void INT_CtxSetHandler( CONTEXT *context, BYTE intnum, FARPROC16 handler )
  88 {
  89     if (ISV86(context)) {
  90         TRACE(int, "Set real mode interrupt vector %02x <- %04x:%04x\n",
  91                      intnum, HIWORD(handler), LOWORD(handler) );
  92         ((FARPROC16*)V86BASE(context))[intnum] = handler;
  93     } else
  94         INT_SetPMHandler(intnum, handler);
  95 }
  96
  97
  98 /**********************************************************************
  99  *          INT_RealModeInterrupt
 100  *
 101  * Handle real mode interrupts
 102  */
 103 int INT_RealModeInterrupt( BYTE intnum, PCONTEXT context )
 104 {
 105     /* we should really map to if1632/wprocs.spec, but not all
 106      * interrupt handlers are adapted to support real mode yet */
 107     switch (intnum) {
 108         case 0x10:
 109             INT_Int10Handler(context);
 110             break;
 111         case 0x11:
 112             INT_Int11Handler(context);
 113             break;
 114         case 0x13:
 115             INT_Int13Handler(context);
 116             break;
 117         case 0x16:
 118             INT_Int16Handler(context);
 119             break;
 120         case 0x17:
 121             INT_Int17Handler(context);
 122             break;
 123         case 0x1a:
 124             INT_Int1aHandler(context);
 125             break;
 126         case 0x20:
 127             INT_Int20Handler(context);
 128             break;
 129         case 0x21:
 130             DOS3Call(context);
 131             break;
 132         case 0x25:
 133             INT_Int25Handler(context);
 134             break;
 135         case 0x2f:
 136             INT_Int2fHandler(context);
 137             break;
 138         case 0x31:
 139             INT_Int31Handler(context);
 140             break;
 141         case 0x29:
 142             INT_Int29Handler(context);
 143             break;
 144         default:
 145             FIXME(int, "Unknown Interrupt in DOS mode: 0x%x\n", intnum);
 146             return 1;
 147     }
 148     return 0;
 149 }