2010-04-07 Doug Kwan <dougkwan@google.com>

[deliverable/binutils-gdb.git] / gold / parameters.h

diff --git a/gold/parameters.h b/gold/parameters.h
index 3b10228706fa03cd6589cc621a2f242bacd9dd7d..0ca2941e0abbd6788a473df575ba93a0e5523da0 100644 (file)
--- a/gold/parameters.h
+++ b/gold/parameters.h
@@ -1,6 +1,6 @@
 // parameters.h -- general parameters for a link using gold  -*- C++ -*-
 
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -29,6 +29,9 @@ namespace gold
 class General_options;
 class Errors;
 class Target;
+template<int size, bool big_endian>
+class Sized_target;
+class Set_parameters_target_once;
 
 // Here we define the Parameters class which simply holds simple
 // general parameters which apply to the entire link.  We use a global
@@ -47,11 +50,7 @@ class Target;
 class Parameters
 {
  public:
-  Parameters()
-    : errors_(NULL), options_(NULL), target_(NULL),
-      doing_static_link_valid_(false), doing_static_link_(false),
-      debug_(0)
-  { }
+  Parameters();
 
   // These should be called as soon as they are known.
   void
@@ -61,7 +60,7 @@ class Parameters
   set_options(const General_options* options);
 
   void
-  set_target(const Target* target);
+  set_target(Target* target);
 
   void
   set_doing_static_link(bool doing_static_link);
@@ -98,10 +97,23 @@ class Parameters
     return *this->target_;
   }
 
-  // When we don't have an output file to associate a target, make a
-  // default one, with guesses about size and endianness.
-  const Target&
-  default_target() const;
+  // The Sized_target of the output file.  The caller must request the
+  // right size and endianness.
+  template<int size, bool big_endian>
+  Sized_target<size, big_endian>*
+  sized_target() const
+  {
+    gold_assert(this->target_valid());
+    return static_cast<Sized_target<size, big_endian>*>(this->target_);
+  }
+
+  // Clear the target, for testing.
+  void
+  clear_target();
+
+  // Return true if TARGET is compatible with the current target.
+  bool
+  is_compatible_target(const Target*) const;
 
   bool
   doing_static_link() const
@@ -116,7 +128,9 @@ class Parameters
   int
   debug() const
   {
-    gold_assert(this->options_valid());
+    // This can be called before the options are set up.
+    if (!this->options_valid())
+      return 0;
     return debug_;
   }
 
@@ -132,12 +146,21 @@ class Parameters
 
 
  private:
+  void
+  set_target_once(Target*);
+
+  void
+  check_target_endianness();
+
+  friend class Set_parameters_target_once;
+
   Errors* errors_;
   const General_options* options_;
-  const Target* target_;
+  Target* target_;
   bool doing_static_link_valid_;
   bool doing_static_link_;
   int debug_;
+  Set_parameters_target_once* set_parameters_target_once_;
 };
 
 // This is a global variable.
@@ -153,11 +176,22 @@ extern void
 set_parameters_options(const General_options* options);
 
 extern void
-set_parameters_target(const Target* target);
+set_parameters_target(Target* target);
 
 extern void
 set_parameters_doing_static_link(bool doing_static_link);
-  
+
+// Ensure that the target to be valid by using the default target if
+// necessary.
+
+extern void
+parameters_force_valid_target();
+
+// Clear the current target, for testing.
+
+extern void
+parameters_clear_target();
+
 // Return whether we are doing a particular debugging type.  The
 // argument is one of the flags from debug.h.