2ea9794110
2009-12-11 Doug Kwan <dougkwan@google.com> 2009-12-11 Nick Clifton <nickc@redhat.com> * configure.ac: Remove -Wshadow when setting WARN_CXXFLAGS.
125 lines
3.3 KiB
C++
125 lines
3.3 KiB
C++
// target-select.cc -- select a target for an object file
|
|
|
|
// Copyright 2006, 2007, 2008 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"
|
|
|
|
namespace
|
|
{
|
|
|
|
// The start of the list of target selectors.
|
|
|
|
gold::Target_selector* target_selectors;
|
|
|
|
} // End anonymous namespace.
|
|
|
|
namespace gold
|
|
{
|
|
|
|
// 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,
|
|
const char* bfd_name)
|
|
: machine_(machine), size_(size), is_big_endian_(is_big_endian),
|
|
bfd_name_(bfd_name), instantiated_target_(NULL), lock_(NULL),
|
|
initialize_lock_(&this->lock_)
|
|
|
|
{
|
|
this->next_ = target_selectors;
|
|
target_selectors = this;
|
|
}
|
|
|
|
// Instantiate the target and return it. Use a lock to avoid
|
|
// instantiating two instances of the same target.
|
|
|
|
Target*
|
|
Target_selector::instantiate_target()
|
|
{
|
|
// We assume that the pointer will either be written entirely or not
|
|
// at all.
|
|
if (this->instantiated_target_ == NULL)
|
|
{
|
|
this->initialize_lock_.initialize();
|
|
Hold_optional_lock hl(this->lock_);
|
|
if (this->instantiated_target_ == NULL)
|
|
this->instantiated_target_ = this->do_instantiate_target();
|
|
}
|
|
return this->instantiated_target_;
|
|
}
|
|
|
|
// Find the target for an ELF file.
|
|
|
|
Target*
|
|
select_target(int machine, int size, bool is_big_endian, int osabi,
|
|
int abiversion)
|
|
{
|
|
for (Target_selector* p = target_selectors; p != NULL; p = p->next())
|
|
{
|
|
int pmach = p->machine();
|
|
if ((pmach == machine || pmach == elfcpp::EM_NONE)
|
|
&& p->get_size() == size
|
|
&& (p->is_big_endian() ? is_big_endian : !is_big_endian))
|
|
{
|
|
Target* ret = p->recognize(machine, osabi, abiversion);
|
|
if (ret != NULL)
|
|
return ret;
|
|
}
|
|
}
|
|
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.
|