Re: [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, [e-mail] [e-mail] wrote:
> From: [e-mail] [e-mail]
> Subject: Re: [ros-dev] runtime time function question in freeldr
> To: "ReactOS Development List" [e-mail]
> 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
> > [e-mail]
> > http://www.reactos.org/mailman/listinfo/ros-dev
>
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