1 files changed, 21 insertions, 0 deletions
diff --git a/src/cmd/go/internal/mmap/mmap_other.go b/src/cmd/go/internal/mmap/mmap_other.go
new file mode 100644
index 0000000..d146a42
--- /dev/null
+++ b/src/cmd/go/internal/mmap/mmap_other.go
@@ -0,0 +1,21 @@
+// Copyright 2022 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build (js && wasm) || plan9
+
+package mmap
+
+import (
+	"io"
+	"os"
+)
+
+// mmapFile on other systems doesn't mmap the file. It just reads everything.
+func mmapFile(f *os.File) (Data, error) {
+	b, err := io.ReadAll(f)
+	if err != nil {
+		return Data{}, err
+	}
+	return Data{f, b}, nil
+}