var specialFuncs = map[string]funcInfo{
	"runtime.rt0_go":             findfunc(abi.FuncPCABI0(rt0_go)),
	"runtime.systemstack_switch": findfunc(abi.FuncPCABI0(systemstack_switch)),
	"runtime.systemstack":        findfunc(abi.FuncPCABI0(systemstack)),
}

const (
	FuncID_rt0_go             = funcID_rt0_go
	FuncID_systemstack_switch = funcID_systemstack_switch
	FuncID_systemstack        = funcID_systemstack
)

func GetSpecialFuncInfo(name string) (funcInfo, bool) {
	f, ok := specialFuncs[name]
	return f, ok
}

func (f funcInfo) FuncID() funcID {
	return f.funcID
}

func Test_FuncID(t *testing.T) {
	cases := []struct {
		give string
		want uint8
	}{
		{"runtime.rt0_go", uint8(runtime.FuncID_rt0_go)},
		{"runtime.systemstack_switch", uint8(runtime.FuncID_systemstack_switch)},
		{"runtime.systemstack", uint8(runtime.FuncID_systemstack)},
	}
	for _, cas := range cases {
		f, ok := runtime.GetSpecialFuncInfo(cas.give)
		if !ok {
			t.Fatal("can't get funcinfo of", cas.give)
		}
		got := f.FuncID()
		if uint8(got) != cas.want {
			t.Errorf("Check FuncInfo of %s failed, want %d, got %d", cas.give, cas.want, got)
		}
	}
}