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diff --git a/third_party/wasm2c/include/wabt/binary-reader-objdump.h b/third_party/wasm2c/include/wabt/binary-reader-objdump.h
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+++ b/third_party/wasm2c/include/wabt/binary-reader-objdump.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2016 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef WABT_BINARY_READER_OBJDUMP_H_
+#define WABT_BINARY_READER_OBJDUMP_H_
+
+#include <map>
+#include <string>
+
+#include "wabt/common.h"
+#include "wabt/feature.h"
+#include "wabt/stream.h"
+
+namespace wabt {
+
+struct Module;
+struct ReadBinaryOptions;
+
+enum class ObjdumpMode {
+  Prepass,
+  Headers,
+  Details,
+  Disassemble,
+  RawData,
+};
+
+struct ObjdumpOptions {
+  Stream* log_stream;
+  bool headers;
+  bool details;
+  bool raw;
+  bool disassemble;
+  bool debug;
+  bool relocs;
+  bool section_offsets;
+  ObjdumpMode mode;
+  const char* filename;
+  const char* section_name;
+};
+
+struct ObjdumpSymbol {
+  wabt::SymbolType kind;
+  std::string name;
+  Index index;
+};
+
+struct ObjdumpNames {
+  std::string_view Get(Index index) const;
+  void Set(Index index, std::string_view name);
+
+  std::map<Index, std::string> names;
+};
+
+struct ObjdumpLocalNames {
+  std::string_view Get(Index function_index, Index local_index) const;
+  void Set(Index function_index, Index local_index, std::string_view name);
+
+  std::map<std::pair<Index, Index>, std::string> names;
+};
+
+// read_binary_objdump uses this state to store information from previous runs
+// and use it to display more useful information.
+struct ObjdumpState {
+  std::vector<Reloc> code_relocations;
+  std::vector<Reloc> data_relocations;
+  ObjdumpNames type_names;
+  ObjdumpNames function_names;
+  ObjdumpNames global_names;
+  ObjdumpNames section_names;
+  ObjdumpNames tag_names;
+  ObjdumpNames segment_names;
+  ObjdumpNames table_names;
+  ObjdumpLocalNames local_names;
+  std::vector<ObjdumpSymbol> symtab;
+  std::map<Index, Index> function_param_counts;
+};
+
+Result ReadBinaryObjdump(const uint8_t* data,
+                         size_t size,
+                         ObjdumpOptions* options,
+                         ObjdumpState* state);
+
+}  // namespace wabt
+
+#endif /* WABT_BINARY_READER_OBJDUMP_H_ */