1 files changed, 22 insertions, 0 deletions
diff --git a/src/cmd/link/internal/ld/outbuf_nommap.go b/src/cmd/link/internal/ld/outbuf_nommap.go
new file mode 100644
index 0000000..6b40253
--- /dev/null
+++ b/src/cmd/link/internal/ld/outbuf_nommap.go
@@ -0,0 +1,22 @@
+// Copyright 2019 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.
+
+// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!windows
+
+package ld
+
+// Mmap allocates an in-heap output buffer with the given size. It copies
+// any old data (if any) to the new buffer.
+func (out *OutBuf) Mmap(filesize uint64) error {
+	// We need space to put all the symbols before we apply relocations.
+	oldheap := out.heap
+	if filesize < uint64(len(oldheap)) {
+		panic("mmap size too small")
+	}
+	out.heap = make([]byte, filesize)
+	copy(out.heap, oldheap)
+	return nil
+}
+
+func (out *OutBuf) munmap() { panic("unreachable") }