mad_status DIGENTRY MITraceSimulate( mad_trace_data *td, mad_disasm_data *dd, const mad_registers *in, mad_registers *out )
{
address sp;
word value;
td = td;
switch( dd->ins.type ) {
case DI_X86_into:
if( !( in->x86.cpu.efl & FLG_O ) ) {
out->x86 = in->x86;
out->x86.cpu.eip += dd->ins.size;
return( MS_OK );
}
/* fall through */
case DI_X86_int:
/* only in real mode */
if( !( dd->characteristics & X86AC_REAL ) )
break;
out->x86 = in->x86;
sp = GetRegSP( out );
sp.mach.offset -= sizeof( word );
value = out->x86.cpu.efl;
MCWriteMem( sp, sizeof( value ), &value );
out->x86.cpu.efl &= ~FLG_I;
value = out->x86.cpu.cs;
MCWriteMem( sp, sizeof( value ), &value );
value = out->x86.cpu.eip;
MCWriteMem( sp, sizeof( value ), &value );
out->x86.cpu.esp = sp.mach.offset;
return( MS_OK );
default:
break;
}
return( MS_UNSUPPORTED );
}
mad_status MADIMPENTRY( CallBuildFrame )( mad_string call, address ret, address rtn, const mad_registers *in, mad_registers *out )
{
unsigned dec;
unsigned_32 value;
address sp;
dec = BIG_SEG( rtn ) ? 4 : 2;
if( call == MAD_MSTR_NIL ) {
call = (dec == 2) ? MAD_MSTR_FAR : MAD_MSTR_NEAR;
}
out->x86 = in->x86;
sp = GetRegSP( out );
switch( call ) {
case MAD_MSTR_INTERRUPT:
sp.mach.offset -= dec;
value = out->x86.cpu.efl;
MCWriteMem( sp, dec, &value );
/* fall through */
case MAD_MSTR_FAR:
sp.mach.offset -= dec;
value = ret.mach.segment;
MCWriteMem( sp, dec, &value );
/* fall through */
case MAD_MSTR_NEAR:
sp.mach.offset -= dec;
value = ret.mach.offset;
MCWriteMem( sp, dec, &value );
break;
}
out->x86.cpu.esp = sp.mach.offset;
out->x86.cpu.cs = rtn.mach.segment;
out->x86.cpu.eip = rtn.mach.offset;
return( MS_OK );
}