2010-01-20 Doug Kwan <dougkwan@google.com>

[thirdparty/binutils-gdb.git] / gold / object.h

diff --git a/gold/object.h b/gold/object.h
index 26e85f5b6a8373155aa6c6533e96f7e60ec328f1..d0068563b5a15047fdb34a7509fd6c826ea74567 100644 (file)
--- a/gold/object.h
+++ b/gold/object.h
@@ -2050,6 +2050,31 @@ struct Relocate_info
   location(size_t relnum, off_t reloffset) const;
 };
 
+// This is used to represent a section in an object and is used as the
+// key type for various section maps.
+typedef std::pair<Object*, unsigned int> Section_id;
+
+// This is similar to Section_id but is used when the section
+// pointers are const.
+typedef std::pair<const Object*, unsigned int> Const_section_id;
+
+// The hash value is based on the address of an object in memory during
+// linking.  It is okay to use this for looking up sections but never use
+// this in an unordered container that we want to traverse in a repeatable
+// manner.
+
+struct Section_id_hash
+{
+  size_t operator()(const Section_id& loc) const
+  { return reinterpret_cast<uintptr_t>(loc.first) ^ loc.second; }
+};
+
+struct Const_section_id_hash
+{
+  size_t operator()(const Const_section_id& loc) const
+  { return reinterpret_cast<uintptr_t>(loc.first) ^ loc.second; }
+};
+
 // Return whether INPUT_FILE contains an ELF object start at file
 // offset OFFSET.  This sets *START to point to a view of the start of
 // the file.  It sets *READ_SIZE to the number of bytes in the view.