_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)