Note function entry points.

libevmasm/LinkerObject.h

@@ -45,6 +45,17 @@ struct LinkerObject
 	/// to a list of offsets into the bytecode that refer to their values.
 	std::map<u256, std::pair<std::string, std::vector<size_t>>> immutableReferences;
 
+	struct FunctionDebugData
+	{
+		std::optional<size_t> bytecodeOffset;
+		std::optional<size_t> sourceID;
+		size_t params = {};
+		size_t returns = {};
+	};
+
+	/// Bytecode offsets of named tags like function entry points.
+	std::map<std::string, FunctionDebugData> functionDebugData;
+
 	/// Appends the bytecode of @a _other and incorporates its link references.
 	void append(LinkerObject const& _other);