Sweden-Number/msdos/interrupts.c

119 lines
3.6 KiB
C

/*
* Interrupt vectors emulation
*
* Copyright 1995 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include "windef.h"
#include "wine/winbase16.h"
#include "miscemu.h"
#include "msdos.h"
#include "module.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
static FARPROC16 INT_Vectors[256];
static FARPROC48 INT_Vectors48[256];
/* Ordinal number for interrupt 0 handler in WPROCS.DLL */
#define FIRST_INTERRUPT 100
/**********************************************************************
* INT_GetPMHandler
*
* Return the protected mode interrupt vector for a given interrupt.
*/
FARPROC16 INT_GetPMHandler( BYTE intnum )
{
if (!INT_Vectors[intnum])
{
static HMODULE16 wprocs;
if (!wprocs)
{
if (((wprocs = GetModuleHandle16( "wprocs" )) < 32) &&
((wprocs = LoadLibrary16( "wprocs" )) < 32))
{
ERR("could not load wprocs.dll\n");
return 0;
}
}
if (!(INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + intnum))))
{
WARN("int%x not implemented, returning dummy handler\n", intnum );
INT_Vectors[intnum] = GetProcAddress16( wprocs, (LPCSTR)(FIRST_INTERRUPT + 256) );
}
}
return INT_Vectors[intnum];
}
/**********************************************************************
* INT_SetPMHandler
*
* Set the protected mode interrupt handler for a given interrupt.
*/
void INT_SetPMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
INT_Vectors[intnum] = handler;
}
/**********************************************************************
* INT_GetPMHandler48
*
* Return the protected mode interrupt vector for a given interrupt.
* Used to get 48-bit pointer for 32-bit interrupt handlers in DPMI32.
*/
FARPROC48 INT_GetPMHandler48( BYTE intnum )
{
if (!INT_Vectors48[intnum].selector)
{
INT_Vectors48[intnum].selector = DOSMEM_dpmi_segments.int48_sel;
INT_Vectors48[intnum].offset = 4 * intnum;
}
return INT_Vectors48[intnum];
}
/**********************************************************************
* INT_SetPMHandler48
*
* Set the protected mode interrupt handler for a given interrupt.
* Used to set 48-bit pointer for 32-bit interrupt handlers in DPMI32.
*/
void INT_SetPMHandler48( BYTE intnum, FARPROC48 handler )
{
TRACE("Set 32-bit protected mode interrupt vector %02x <- %04x:%08x\n",
intnum, handler.selector, handler.offset );
INT_Vectors48[intnum] = handler;
}
/**********************************************************************
* INT_DefaultHandler (WPROCS.356)
*
* Default interrupt handler.
*/
void WINAPI INT_DefaultHandler( CONTEXT86 *context )
{
}