[ros-dev] runtime time function question in freeldr

[Zhang Fan]

Thank you for your answer. But I'm still perplexd.
   pushl    %eax  //at that time ,%eax=0? so BootMain will receive NULL parameter?
   call    _BootMain

--- On Wed, 5/20/09, pay7n at o2.pl <pay7n at o2.pl> wrote:

> From: pay7n at o2.pl <pay7n at o2.pl>
> Subject: Re: [ros-dev] runtime time function question in freeldr
> To: "ReactOS Development List" <ros-dev at reactos.org>
> Date: Wednesday, May 20, 2009, 3:18 AM
> This is not an Intel syntax.
> Operands in memory operations have inverted order:
> 
> mov src, dest
> 
> not
> 
> mov dest, src
> 
> thus eax == 0
> 
> 
> Zhang Fan pisze:
> > Hi everybody,
> > I'm a newbie of ReactOS, and I've just looked a piece
> of code in freeldr module. I found some runtime function
> such as strstr(). I want to know if the run time lib should
> be initialized, and where the initialized code.
> > Another question is that a piece of code in arch.S
> > 
> > 
> > EXTERN(RealEntryPoint)
> > 
> > //....
> >     .code32
> > 
> >     /* Zero BootDrive and BootPartition
> */
> >     xorl    %eax,%eax
> >     movl   
> %eax,(_BootDrive)
> >     movl   
> %eax,(_BootPartition)
> > 
> >     /* Store the boot drive */
> >     movb   
> %dl,(_BootDrive)
> > 
> >     /* Store the boot partition */
> >     movb   
> %dh,(_BootPartition)
> > 
> >     /* GO! */
> >     pushl    %eax
> >     call    _BootMain
> > 
> > At there, I think %eax should equal zero, and BootMain
> will call CmdLineParse(),and CmdLineParse will call
> strstr(). So it cause strstr will receive a NULL parameter.
> Is it right?
> > 
> > Thank you.
> > 
> > Fan Zhang
> > 
> > 
> >       
> > 
> > _______________________________________________
> > Ros-dev mailing list
> > Ros-dev at reactos.org
> > http://www.reactos.org/mailman/listinfo/ros-dev
> > 
> 
> _______________________________________________
> Ros-dev mailing list
> Ros-dev at reactos.org
> http://www.reactos.org/mailman/listinfo/ros-dev
>