// target-select.cc -- select a target for an object file
-// 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.
#include "gold.h"
+#include <cstring>
+
#include "elfcpp.h"
#include "target-select.h"
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 is_big_endian)
- : machine_(machine), size_(size), is_big_endian_(is_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*
+Target*
select_target(int machine, int size, bool is_big_endian, int osabi,
int abiversion)
{
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.