Initial CVS checkin of gold

gold/symtab.h

@@ -0,0 +1,80 @@
+// symtab.h -- the gold symbol table   -*- C++ -*-
+
+// Symbol_table
+//   The symbol table.
+
+#include "gold.h"
+
+#include <string>
+#include <utility>
+
+#include "elfcpp.h"
+#include "targetsize.h"
+#include "object.h"
+#include "workqueue.h"
+
+#ifndef GOLD_SYMTAB_H
+#define GOLD_SYMTAB_H
+
+namespace gold
+{
+
+// An entry in the symbol table.  The symbol table can have a lot of
+// entries, so we don't want this class to get too big.
+
+template<int size>
+class Symbol
+{
+ public:
+  typedef typename elfcpp::Elf_types<size>::Elf_Addr Value;
+  typedef typename Size_types<size>::Unsigned_type Size;
+
+ private:
+  // Every symbol has a unique name, more or less, so we use
+  // std::string for the name.  There are only a few versions in a
+  // given link, so for them we point into a pool.
+  std::string name_;
+  const char* version_;
+  Object* object_;
+  unsigned int shnum_;
+  Value value_;
+  Size size_;
+  elfcpp::STT type_ : 4;
+  elfcpp::STB binding_ : 4;
+  elfcpp:STV visibility_ : 2;
+  unsigned int other_ : 6;
+};
+
+// The main linker symbol table.
+
+template<int size>
+class Symbol_table
+{
+ public:
+  Symbol_table();
+
+  // Return a pointer to a symbol specified by name.
+  Symbol*
+  lookup(const std::string& name) const;
+
+  // Return a pointer to a symbol specified by name plus version.
+  Symbol*
+  lookup(const std::string& name, const char* version) const;
+
+  Task_token&
+  token() const
+  { return this->token_; }
+
+ private:
+  Symbol_table(const Symbol_table&);
+  Symbol_table& operator=(const Symbol_table&);
+
+  typedef std::pair<std::string, std::string> Symbol_table_key;
+
+  Unordered_map<Symbol_table_key, Symbol<size>*> table_;
+  Task_token token_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_SYMTAB_H)