func LookupRuntimeFunc(name string) *obj.LSym {
	return LookupRuntimeABI(name, obj.ABIInternal)
}

// LookupRuntimeVar looks up a variable (or assembly function) name in package
// runtime. If this is a function, it may have a special calling
// convention.
func LookupRuntimeVar(name string) *obj.LSym {
	return LookupRuntimeABI(name, obj.ABI0)
}

// LookupRuntimeABI looks up a name in package runtime using the given ABI.