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Sweden-Number/dlls/winedos/interrupts.c

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/*
* Interrupt emulation
*
* Copyright 2002 Jukka Heinonen
*
* 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 "dosexe.h"
#include "wine/debug.h"
#include "wine/winbase16.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
static FARPROC16 DOSVM_Vectors16[256];
static FARPROC48 DOSVM_Vectors48[256];
static const INTPROC DOSVM_VectorsBuiltin[] =
{
/* 00 */ 0, 0, 0, 0,
/* 04 */ 0, 0, 0, 0,
/* 08 */ 0, DOSVM_Int09Handler, 0, 0,
/* 0C */ 0, 0, 0, 0,
/* 10 */ DOSVM_Int10Handler, DOSVM_Int11Handler, DOSVM_Int12Handler, DOSVM_Int13Handler,
/* 14 */ 0, DOSVM_Int15Handler, DOSVM_Int16Handler, DOSVM_Int17Handler,
/* 18 */ 0, 0, DOSVM_Int1aHandler, 0,
/* 1C */ 0, 0, 0, 0,
/* 20 */ DOSVM_Int20Handler, DOSVM_Int21Handler, 0, 0,
/* 24 */ 0, DOSVM_Int25Handler, DOSVM_Int26Handler, 0,
/* 28 */ 0, DOSVM_Int29Handler, DOSVM_Int2aHandler, 0,
/* 2C */ 0, 0, 0, DOSVM_Int2fHandler,
/* 30 */ 0, DOSVM_Int31Handler, 0, DOSVM_Int33Handler,
/* 34 */ DOSVM_Int34Handler, DOSVM_Int35Handler, DOSVM_Int36Handler, DOSVM_Int37Handler,
/* 38 */ DOSVM_Int38Handler, DOSVM_Int39Handler, DOSVM_Int3aHandler, DOSVM_Int3bHandler,
/* 3C */ DOSVM_Int3cHandler, DOSVM_Int3dHandler, DOSVM_Int3eHandler, 0,
/* 40 */ 0, DOSVM_Int41Handler, 0, 0,
/* 44 */ 0, 0, 0, 0,
/* 48 */ 0, 0, 0, DOSVM_Int4bHandler,
/* 4C */ 0, 0, 0, 0,
/* 50 */ 0, 0, 0, 0,
/* 54 */ 0, 0, 0, 0,
/* 58 */ 0, 0, 0, 0,
/* 5C */ DOSVM_Int5cHandler, 0, 0, 0,
/* 60 */ 0, 0, 0, 0,
/* 64 */ 0, 0, 0, DOSVM_Int67Handler
};
/* Ordinal number for interrupt 0 handler in winedos16.dll */
#define FIRST_INTERRUPT 100
/**********************************************************************
* DOSVM_DefaultHandler (WINEDOS16.356)
*
* Default interrupt handler. This will be used to emulate all
* interrupts that don't have their own interrupt handler.
*/
void WINAPI DOSVM_DefaultHandler( CONTEXT86 *context )
{
}
/**********************************************************************
* DOSVM_EmulateInterruptPM
*
* Emulate software interrupt in 16-bit or 32-bit protected mode.
* Called from signal handler when intXX opcode is executed.
*
* Pushes interrupt frame to stack and changes instruction
* pointer to interrupt handler.
*/
void WINAPI DOSVM_EmulateInterruptPM( CONTEXT86 *context, BYTE intnum )
{
BOOL islong;
if(context->SegCs == DOSVM_dpmi_segments->int48_sel)
islong = FALSE;
else if(context->SegCs == DOSVM_dpmi_segments->dpmi_sel)
islong = FALSE;
else if(DOSVM_IsDos32())
islong = TRUE;
else if(IS_SELECTOR_32BIT(context->SegCs)) {
WARN("Interrupt in 32-bit code and mode is not DPMI32\n");
islong = TRUE;
} else
islong = FALSE;
if(islong)
{
FARPROC48 addr = DOSVM_GetPMHandler48( intnum );
DWORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
/* Push the flags and return address on the stack */
*(--stack) = context->EFlags;
*(--stack) = context->SegCs;
*(--stack) = context->Eip;
/* Jump to the interrupt handler */
context->SegCs = addr.selector;
context->Eip = addr.offset;
}
else
{
FARPROC16 addr = DOSVM_GetPMHandler16( intnum );
WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
/* Push the flags and return address on the stack */
*(--stack) = LOWORD(context->EFlags);
*(--stack) = context->SegCs;
*(--stack) = LOWORD(context->Eip);
/* Jump to the interrupt handler */
context->SegCs = HIWORD(addr);
context->Eip = LOWORD(addr);
}
if (IS_SELECTOR_32BIT(context->SegSs))
context->Esp += islong ? -12 : -6;
else
ADD_LOWORD( context->Esp, islong ? -12 : -6 );
}
/**********************************************************************
* DOSVM_GetRMHandler
*
* Return the real mode interrupt vector for a given interrupt.
*/
FARPROC16 DOSVM_GetRMHandler( BYTE intnum )
{
return ((FARPROC16*)0)[intnum];
}
/**********************************************************************
* DOSVM_SetRMHandler
*
* Set the real mode interrupt handler for a given interrupt.
*/
void DOSVM_SetRMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
((FARPROC16*)0)[intnum] = handler;
}
/**********************************************************************
* DOSVM_GetPMHandler16
*
* Return the protected mode interrupt vector for a given interrupt.
*/
FARPROC16 DOSVM_GetPMHandler16( BYTE intnum )
{
static HMODULE16 procs;
FARPROC16 handler = DOSVM_Vectors16[intnum];
if (!handler)
{
if (!procs &&
(procs = GetModuleHandle16( "winedos16" )) < 32 &&
(procs = LoadLibrary16( "winedos16" )) < 32)
{
ERR("could not load winedos16.dll\n");
procs = 0;
return 0;
}
handler = GetProcAddress16( procs, (LPCSTR)(FIRST_INTERRUPT + intnum));
if (!handler)
{
WARN("int%x not implemented, returning dummy handler\n", intnum );
handler = GetProcAddress16( procs, (LPCSTR)(FIRST_INTERRUPT + 256));
}
DOSVM_Vectors16[intnum] = handler;
}
return handler;
}
/**********************************************************************
* DOSVM_SetPMHandler16
*
* Set the protected mode interrupt handler for a given interrupt.
*/
void DOSVM_SetPMHandler16( BYTE intnum, FARPROC16 handler )
{
TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
DOSVM_Vectors16[intnum] = handler;
}
/**********************************************************************
* DOSVM_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 DOSVM_GetPMHandler48( BYTE intnum )
{
if (!DOSVM_Vectors48[intnum].selector)
{
DOSVM_Vectors48[intnum].selector = DOSVM_dpmi_segments->int48_sel;
DOSVM_Vectors48[intnum].offset = 6 * intnum;
}
return DOSVM_Vectors48[intnum];
}
/**********************************************************************
* DOSVM_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 DOSVM_SetPMHandler48( BYTE intnum, FARPROC48 handler )
{
TRACE("Set 32-bit protected mode interrupt vector %02x <- %04x:%08lx\n",
intnum, handler.selector, handler.offset );
DOSVM_Vectors48[intnum] = handler;
}
/**********************************************************************
* DOSVM_GetBuiltinHandler
*
* Return Wine interrupt handler procedure for a given interrupt.
*/
INTPROC DOSVM_GetBuiltinHandler( BYTE intnum )
{
if (intnum < sizeof(DOSVM_VectorsBuiltin)/sizeof(INTPROC)) {
INTPROC proc = DOSVM_VectorsBuiltin[intnum];
if(proc)
return proc;
}
WARN("int%x not implemented, returning dummy handler\n", intnum );
return DOSVM_DefaultHandler;
}
/**********************************************************************
* DOSVM_CallBuiltinHandler
*
* Execute Wine interrupt handler procedure.
*/
void WINAPI DOSVM_CallBuiltinHandler( CONTEXT86 *context, BYTE intnum )
{
INTPROC proc = DOSVM_GetBuiltinHandler( intnum );
proc( context );
}
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