void GrabHandlers( void )
{
PMData->oldint10.a = MyGetRMVector( 0x10 );
OldInt1b.a = MyGetRMVector( CTRL_BREAK_VECTOR );
OldInt23.a = MyGetRMVector( 0x23 );
OldInt24.a = MyGetRMVector( 0x24 );
OldInt28.a = MyGetRMVector( 0x28 );
MySetRMVector( 0x10, RMData.s.rm, RM_OFF( Interrupt10 ) );
MySetRMVector( CTRL_BREAK_VECTOR, RMData.s.rm, RM_OFF( Interrupt1b_23 ) );
MySetRMVector( 0x23, RMData.s.rm, RM_OFF( Interrupt1b_23 ) );
MySetRMVector( 0x24, RMData.s.rm, RM_OFF( Interrupt24 ) );
MySetRMVector( 0x28, Orig28.s.segment, Orig28.s.offset );
}
void RestoreHandlers( void )
{
if( PMData->oldint10.a != 0 ) {
MySetRMVector( 0x10, PMData->oldint10.s.segment,
PMData->oldint10.s.offset );
}
if( OldInt1b.a ) {
MySetRMVector( CTRL_BREAK_VECTOR, OldInt1b.s.segment, OldInt1b.s.offset );
}
if( OldInt23.a ) {
MySetRMVector( 0x23, OldInt23.s.segment, OldInt23.s.offset );
}
if( OldInt24.a ) {
MySetRMVector( 0x24, OldInt24.s.segment, OldInt24.s.offset );
}
if( OldInt28.a ) {
MySetRMVector( 0x28, OldInt28.s.segment, OldInt28.s.offset );
}
}
static char *SetTrapHandler( void )
{
char dummy;
long result;
descriptor desc;
version_info ver;
PMData->vecttable1[DOS4G_COMM_VECTOR].s.segment = RMData.segm.rm;
PMData->vecttable1[DOS4G_COMM_VECTOR].s.offset = RM_OFF( Interrupt15 );
PMData->vecttable2[DOS4G_COMM_VECTOR].s.segment = RMData.segm.rm;
PMData->vecttable2[DOS4G_COMM_VECTOR].s.offset = RM_OFF( Interrupt15 );
if( IntrState == IS_NONE ) {
DPMIGetVersion( &ver );
if( (ver.major_version >= 1 || ver.minor_version > 90) || DPMICheck == 2 ) {
RawPMtoRMSwitchAddr = DPMIRawPMtoRMAddr();
PMData->switchaddr.a= DPMIRawRMtoPMAddr();
}
if( RawPMtoRMSwitchAddr == 0
|| PMData->switchaddr.a == 0
|| DPMICheck == 1 ) {
IntrState = IS_RATIONAL;
} else {
PMData->saveaddr.a = DPMISavePMStateAddr();
PMData->savesize = DPMISaveStateSize();
if( PMData->savesize == 0 ) {
PMData->saveseg.dpmi_adr = 0;
} else {
PMData->saveseg.dpmi_adr = DPMIAllocateDOSMemoryBlock(
_NBPARAS(PMData->savesize*2) );
if( PMData->saveseg.segm.pm == 0 ) {
return( TC_ERR_OUT_OF_DOS_MEMORY );
}
}
PMData->othersaved = false;
result = DPMIAllocateLDTDescriptors( 1 );
if( result < 0 ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
DPMIGetDescriptor( FP_SEG( PMData ), &desc );
PMData->pmode_cs = (unsigned_16)result;
desc.xtype.use32 = 0;
desc.type.execute = 1;
DPMISetDescriptor( PMData->pmode_cs, &desc );
PMData->pmode_eip = RM_OFF( BackFromRealMode );
PMData->pmode_ds = FP_SEG( &PMData );
PMData->pmode_es = PMData->pmode_ds;
PMData->pmode_ss = FP_SEG( &dummy );
IntrState = IS_DPMI;
}
}
if( IntrState == IS_RATIONAL ) {
MySetRMVector( TRAP_VECTOR, RMData.segm.rm, RM_OFF( RMTrapHandler ) );
}
return( NULL );
}
void RestoreOrigVectors(void)
{
unsigned i;
unsigned old;
for( i = 0; i < NUM_PM_SAVE_EXCEPTS; ++i ) {
DPMISetPMExceptionVector( PMExceptSaveList[i], OrigPMExcepts[i] );
}
for( i = 0; i < NUM_PM_SAVE_VECTS; ++i ) {
DPMISetPMInterruptVector( PMVectSaveList[i], OrigPMVects[i] );
}
old = D32NullPtrCheck( 0 );
for( i = 0; i < NUM_VECTS; ++i ) {
MySetRMVector( i, PMData->orig_vects[i].s.segment, PMData->orig_vects[i].s.offset );
}
D32NullPtrCheck( old );
}
