runtime time function question in freeldr

[Zhang Fan]

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

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
>
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