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-rw-r--r--src/cmd/link/internal/sym/symbol.go42
1 files changed, 42 insertions, 0 deletions
diff --git a/src/cmd/link/internal/sym/symbol.go b/src/cmd/link/internal/sym/symbol.go
new file mode 100644
index 0000000..2f2c839
--- /dev/null
+++ b/src/cmd/link/internal/sym/symbol.go
@@ -0,0 +1,42 @@
+// Copyright 2017 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/obj"
+ "internal/buildcfg"
+)
+
+const (
+ SymVerABI0 = 0
+ SymVerABIInternal = 1
+ SymVerABICount = 2 // Number of internal ABIs
+ SymVerStatic = 10 // Minimum version used by static (file-local) syms
+)
+
+func ABIToVersion(abi obj.ABI) int {
+ switch abi {
+ case obj.ABI0:
+ return SymVerABI0
+ case obj.ABIInternal:
+ if !buildcfg.Experiment.RegabiWrappers {
+ // If wrappers are not enabled, ABI0 and ABIInternal are actually same
+ // so we normalize everything to ABI0.
+ return SymVerABI0
+ }
+ return SymVerABIInternal
+ }
+ return -1
+}
+
+func VersionToABI(v int) (obj.ABI, bool) {
+ switch v {
+ case SymVerABI0:
+ return obj.ABI0, true
+ case SymVerABIInternal:
+ return obj.ABIInternal, true
+ }
+ return ^obj.ABI(0), false
+}