return __syscall_sigprocmask (how, set, oset);
return INLINE_SYSCALL (sigprocmask, 3, how, set, oset);
__sigprocmask (how, set, oset)     int how;     const sigset_t *set;     sigset_t *oset;{  /* First try the RT signals.  */  if (!__libc_missing_rt_sigs)    {      /* XXX The size argument hopefully will have to be changed to the	 real size of the user-level sigset_t.  */      int saved_errno = errno;      int result = __syscall_rt_sigprocmask (how, set, oset, _NSIG / 8);      if (result >= 0 || errno != ENOSYS)	return result;      __set_errno (saved_errno);      __libc_missing_rt_sigs = 1;    }  return __syscall_sigprocmask (how, set, oset);}