linux_sys_shmat
int linux_sys_shmat(struct lwp *, const struct linux_sys_shmat_args *, register_t *);
.sy_call = (sy_call_t *)linux_sys_shmat
return linux_sys_shmat(l, &bsa, retval);
int linux_sys_shmat(struct lwp *, const struct linux_sys_shmat_args *, register_t *);