Initial commit: Go 1.23 release state

src/runtime/mem_wasm.go

@@ -0,0 +1,20 @@
+// Copyright 2023 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.
+
+package runtime
+
+import "unsafe"
+
+func sbrk(n uintptr) unsafe.Pointer {
+	grow := divRoundUp(n, physPageSize)
+	size := growMemory(int32(grow))
+	if size < 0 {
+		return nil
+	}
+	resetMemoryDataView()
+	return unsafe.Pointer(uintptr(size) * physPageSize)
+}
+
+// Implemented in src/runtime/sys_wasm.s
+func growMemory(pages int32) int32