LINUX_SS_ONSTACK
if (luc->luc_stack.ss_flags & LINUX_SS_ONSTACK)
tmp_sigframe->uc.luc_stack.ss_flags |= LINUX_SS_ONSTACK;
sigframe.uc.luc_stack.ss_flags |= LINUX_SS_ONSTACK;
if (luctx->luc_stack.ss_flags & LINUX_SS_ONSTACK)
(l->l_sigstk.ss_flags & SS_ONSTACK ? LINUX_SS_ONSTACK : 0) |
(tuc.uc_stack.ss_flags & LINUX_SS_ONSTACK ? SS_ONSTACK : 0);
#ifdef LINUX_SS_ONSTACK
if (lss->ss_flags & LINUX_SS_ONSTACK)
lss->ss_flags = LINUX_SS_ONSTACK;
if (luc->luc_stack.ss_flags & LINUX_SS_ONSTACK)
tmp_sigframe->uc.luc_stack.ss_flags |= LINUX_SS_ONSTACK;