DDJ, December 1995: Examining the Windows 95 Layered File System
by Mark Russinovich and Bryce Cogswell

Listing Five

        mov     eax, [ebx].IOP_calldown_ptr     ; get call down address
        mov     eax, [eax].DCB_cd_next          ; get next calldown entry
        mov     [ebx].IOP_calldown_ptr, eax     ; reset calldown pointer
        push    ebx                             ; place IOP on stack
        call    [eax].DCB_CD_IO_Address         ; call next layer
        add     esp, 4                          ; restore stack