gdb/

[deliverable/binutils-gdb.git] / gold / target-select.cc

diff --git a/gold/target-select.cc b/gold/target-select.cc
index 28b75277809677a9837bacf45ca8ab18a0a68a2e..859bc3bd62c9acffc5c0291c41ee7723388ce3ff 100644 (file)
--- a/gold/target-select.cc
+++ b/gold/target-select.cc
@@ -1,7 +1,29 @@
 // target-select.cc -- select a target for an object file
 
+// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
 #include "gold.h"
 
+#include <cstring>
+
 #include "elfcpp.h"
 #include "target-select.h"
 
@@ -17,29 +39,58 @@ gold::Target_selector* target_selectors;
 namespace gold
 {
 
+// Class Set_target_once.
+
+void
+Set_target_once::do_run_once(void*)
+{
+  this->target_selector_->set_target();
+}
+
 // Construct a Target_selector, which means adding it to the linked
 // list.  This runs at global constructor time, so we want it to be
 // fast.
 
-Target_selector::Target_selector(int machine, int size, bool big_endian)
-  : machine_(machine), size_(size), big_endian_(big_endian)
+Target_selector::Target_selector(int machine, int size, bool is_big_endian,
+                                const char* bfd_name)
+  : machine_(machine), size_(size), is_big_endian_(is_big_endian),
+    bfd_name_(bfd_name), instantiated_target_(NULL), set_target_once_(this)
 {
   this->next_ = target_selectors;
   target_selectors = this;
 }
 
+// Instantiate the target and return it.  Use SET_TARGET_ONCE_ to
+// avoid instantiating two instances of the same target.
+
+Target*
+Target_selector::instantiate_target()
+{
+  this->set_target_once_.run_once(NULL);
+  return this->instantiated_target_;
+}
+
+// Instantiate the target.  This is called at most once.
+
+void
+Target_selector::set_target()
+{
+  gold_assert(this->instantiated_target_ == NULL);
+  this->instantiated_target_ = this->do_instantiate_target();
+}
+
 // Find the target for an ELF file.
 
-extern Target*
-select_target(int machine, int size, bool big_endian, int osabi,
+Target*
+select_target(int machine, int size, bool is_big_endian, int osabi,
              int abiversion)
 {
-  for (const Target_selector* p = target_selectors; p != NULL; p = p->next())
+  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
     {
       int pmach = p->machine();
       if ((pmach == machine || pmach == elfcpp::EM_NONE)
-         && p->size() == size
-         && p->big_endian() ? big_endian : !big_endian)
+         && p->get_size() == size
+         && (p->is_big_endian() ? is_big_endian : !is_big_endian))
        {
          Target* ret = p->recognize(machine, osabi, abiversion);
          if (ret != NULL)
@@ -49,4 +100,32 @@ select_target(int machine, int size, bool big_endian, int osabi,
   return NULL;
 }
 
+// Find a target using a BFD name.  This is used to support the
+// --oformat option.
+
+Target*
+select_target_by_name(const char* name)
+{
+  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
+    {
+      const char* pname = p->bfd_name();
+      if (pname == NULL || strcmp(pname, name) == 0)
+       {
+         Target* ret = p->recognize_by_name(name);
+         if (ret != NULL)
+           return ret;
+       }
+    }
+  return NULL;
+}
+
+// Push all the supported BFD names onto a vector.
+
+void
+supported_target_names(std::vector<const char*>* names)
+{
+  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
+    p->supported_names(names);
+}
+
 } // End namespace gold.