mcount
#define _IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do { \
(ifq)->ifq_len += (mcount); \
#define IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do { \
_IF_PREPEND_LIST(ifq, mhead, mtail, mcount); \
jbsr JUMPTARGET (mcount); \
pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp;
call JUMPTARGET(mcount); \