C软件加密解密之动态跟踪1

1、新的中断服务程序

void interrupt newint (bp,di,si,ds,es,dx,cx,bx,ax,ip,cs,flgs)
{
    /*用于读取标志寄存器*/
    flag = flgs;
}
    /*新INT 3H服务程序*/
void interrupt new13(bp,di,si,ds,es,dx,cx,bx,ax,ip,cs,flgs)
{
/*实际磁盘操作*/
    (*old13) (bp,di,si,ds,es,dx,cx,bx,as,ip,cs,flgs);   
    
 /*保存出口参数*/
    out_ax = _AX;
    out_cx = _CX;
    out_dx = _DX;

/*巧取标志寄存器的值*/
    newint();
    flgs = flag;

/*驱动器*/
    drive = dx&0xff;

/*记录入口参数*/
    record[number].ax = ax;
    record[number].cx = cx;
    record[number].dx = dx;
    ax = out_ax;
    cx = out_cx;
    dx = out_dx;
    if(number<MAXRECORD)
    if(drive == 0 || drive == 1)
    {
        /*驱动器为A或B即软驱时才记录*/
        parameter = MK_FP(peek(0,0x78+2),peek(0,0x78));
        for(p = 0;p < 11; p++)
        {
        /*记录盘基参数*/
        record[number].parameter[p] = parameter[p];
        /*记录出口参数*/
        record[number].out_ax = ax;
        /*记录标志寄存器*/
        record[number].flags = flgs;
        number++;
        }
    }
}