[ros-dev] About @KfLowerIrql at 4
ayerkes at speakeasy.net
Thu Dec 18 09:47:46 CET 2008
On Wed, 17 Dec 2008 22:57:46 -0800 (PST)
Fan Zhang <fanzier at yahoo.com> wrote:
> hi, i'm a newbie of ReacOS.
> I looked a piece of code in syscall.S which is come from 0.2.7 edtion.
> /* Raise IRQL to APC_LEVEL */
> movl $1, %ecx
> call @KfRaiseIrql at 4
> could anybody help me explain why the function is decorated by @ in the head?
> and why transfer argument by ecx?
Leading @ is for fastcall convention, which passes arguments in registers.
art yerkes <ayerkes at speakeasy.net>
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