// If the signal is ignored, doing nothing is the same as forwarding.
		if fwdFn == _SIG_IGN || (fwdFn == _SIG_DFL && flags&_SigIgn != 0) {
			return true
		}
		// We are not handling the signal and there is no other handler to forward to.
		// Crash with the default behavior.
		if fwdFn == _SIG_DFL {
			setsig(sig, _SIG_DFL)
			dieFromSignal(sig)
			return false
		}

		sigfwd(fwdFn, sig, info, ctx)

	_SigSetStack             // Don't explicitly install handler, but add SA_ONSTACK to existing libc handler
	_SigUnblock              // always unblock; see blockableSig
	_SigIgn                  // _SIG_DFL action is to ignore the signal
)

// Layout of in-memory per-function information prepared by linker
// See https://golang.org/s/go12symtab.
// Keep in sync with linker (../cmd/link/internal/ld/pcln.go:/pclntab)