1 files changed, 35 insertions, 0 deletions
diff --git a/src/cmd/link/internal/sym/compilation_unit.go b/src/cmd/link/internal/sym/compilation_unit.go
new file mode 100644
index 0000000..3bad5bf
--- /dev/null
+++ b/src/cmd/link/internal/sym/compilation_unit.go
@@ -0,0 +1,35 @@
+// 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.
+
+package sym
+
+import "cmd/internal/dwarf"
+
+// LoaderSym holds a loader.Sym value. We can't refer to this
+// type from the sym package since loader imports sym.
+type LoaderSym int
+
+// A CompilationUnit represents a set of source files that are compiled
+// together. Since all Go sources in a Go package are compiled together,
+// there's one CompilationUnit per package that represents all Go sources in
+// that package, plus one for each assembly file.
+//
+// Equivalently, there's one CompilationUnit per object file in each Library
+// loaded by the linker.
+//
+// These are used for both DWARF and pclntab generation.
+type CompilationUnit struct {
+	Lib       *Library      // Our library
+	PclnIndex int           // Index of this CU in pclntab
+	PCs       []dwarf.Range // PC ranges, relative to Textp[0]
+	DWInfo    *dwarf.DWDie  // CU root DIE
+	FileTable []string      // The file table used in this compilation unit.
+
+	Consts    LoaderSym   // Package constants DIEs
+	FuncDIEs  []LoaderSym // Function DIE subtrees
+	VarDIEs   []LoaderSym // Global variable DIEs
+	AbsFnDIEs []LoaderSym // Abstract function DIE subtrees
+	RangeSyms []LoaderSym // Symbols for debug_range
+	Textp     []LoaderSym // Text symbols in this CU
+}