old-cross-binutils/gold/parameters.cc
Doug Kwan 7296d93387 2010-04-07 Doug Kwan <dougkwan@google.com>
* arm.cc: Replace "endianity" with "endianness" in comments.
	(Arm_exidx_cantunwind): Ditto.
	(Arm_relobj::Arm_relobj): Initialize merge_flags_and_attribures.
	(Arm_relobj::merge_flags_and_attributes): New method.
	(Arm_relobj::merge_flags_and_attributes_): New data member.
	(Arm_exidx_cantunwind::do_fixed_endian_write): Fix formatting.
	(Arm_relobj::scan_sections_for_stubs): Ditto.
	(Arm_relobj::do_read_symbols): Check to see if we really want to
	merge processor-specific flags and attributes.  Exit early if
	an object is empty except for section names and the undefined symbol.
	(Target_arm::do_finalize_sections): Move check for ELF format to
	Arm_relobj::do_read_symbols.  Merge processor specific flags and
	attributes from a regular object only when we have determined that
	it is aapropriate.  Do not create an .ARM.attributes section in
	output if there is no regular input object.
	(Target_arm::merge_processor_specific_flags): Check
	--warn-mismatch before printing any error.
	(Target_arm::merge_object_attributes): Ditto.
	* gold.cc (queue_middle_tasks): Handle the case in which there is
	no regular object in input.
	* options.cc (General_options::parse_EB): New method.
	(General_options::parse_EL): Same.
	(General_options::General_options): Initialize endianness_.
	* options.h (-EB, -EL, -no-pipeline-knowledge, -p, --warn-mismatch):
	New options.
	(General_options::Endianness): New enum.
	(General_options::endianness): New method.
	(General_options::endianness_): New data member.
	* parameters.cc (Parameters::set_options): Check target endianness.
	(Parameters::set_target_once): Ditto.
	(Parameters::check_target_endianness): New method.
	(parameters_force_valid_target): If either -EL or -EB is specified,
	use it to define endianness of default target.
	* parameters.h (Parameters::check_target_endianness): New method
	declaration.
	* target.h (class Target): Change "endianity" to "endianness"
	in comments.
2010-04-07 21:42:22 +00:00

283 lines
6.7 KiB
C++

// parameters.cc -- general parameters for a link using gold
// 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 "debug.h"
#include "options.h"
#include "target.h"
#include "target-select.h"
namespace gold
{
// Our local version of the variable, which is not const.
static Parameters static_parameters;
// The global variable.
const Parameters* parameters = &static_parameters;
// A helper class to set the target once.
class Set_parameters_target_once : public Once
{
public:
Set_parameters_target_once(Parameters* parameters)
: parameters_(parameters)
{ }
protected:
void
do_run_once(void* arg)
{ this->parameters_->set_target_once(static_cast<Target*>(arg)); }
private:
Parameters* parameters_;
};
// We only need one Set_parameters_target_once.
static
Set_parameters_target_once set_parameters_target_once(&static_parameters);
// Class Parameters.
Parameters::Parameters()
: errors_(NULL), options_(NULL), target_(NULL),
doing_static_link_valid_(false), doing_static_link_(false),
debug_(0),
set_parameters_target_once_(&set_parameters_target_once)
{
}
void
Parameters::set_errors(Errors* errors)
{
gold_assert(this->errors_ == NULL);
this->errors_ = errors;
}
void
Parameters::set_options(const General_options* options)
{
gold_assert(!this->options_valid());
this->options_ = options;
// For speed, we convert the options() debug var from a string to an
// enum (from debug.h).
this->debug_ = debug_string_to_enum(this->options().debug());
// If --verbose is set, it acts as "--debug=files".
if (options->verbose())
this->debug_ |= DEBUG_FILES;
if (this->target_valid())
this->check_target_endianness();
}
void
Parameters::set_doing_static_link(bool doing_static_link)
{
gold_assert(!this->doing_static_link_valid_);
this->doing_static_link_ = doing_static_link;
this->doing_static_link_valid_ = true;
}
void
Parameters::set_target(Target* target)
{
this->set_parameters_target_once_->run_once(static_cast<void*>(target));
gold_assert(target == this->target_);
}
// This is called at most once.
void
Parameters::set_target_once(Target* target)
{
gold_assert(this->target_ == NULL);
this->target_ = target;
if (this->options_valid())
this->check_target_endianness();
}
// Clear the target, for testing.
void
Parameters::clear_target()
{
this->target_ = NULL;
// We need a new Set_parameters_target_once so that we can set the
// target again.
this->set_parameters_target_once_ = new Set_parameters_target_once(this);
}
// Return whether TARGET is compatible with the target we are using.
bool
Parameters::is_compatible_target(const Target* target) const
{
if (this->target_ == NULL)
return true;
return target == this->target_;
}
Parameters::Target_size_endianness
Parameters::size_and_endianness() const
{
if (this->target().get_size() == 32)
{
if (!this->target().is_big_endian())
{
#ifdef HAVE_TARGET_32_LITTLE
return TARGET_32_LITTLE;
#else
gold_unreachable();
#endif
}
else
{
#ifdef HAVE_TARGET_32_BIG
return TARGET_32_BIG;
#else
gold_unreachable();
#endif
}
}
else if (parameters->target().get_size() == 64)
{
if (!parameters->target().is_big_endian())
{
#ifdef HAVE_TARGET_64_LITTLE
return TARGET_64_LITTLE;
#else
gold_unreachable();
#endif
}
else
{
#ifdef HAVE_TARGET_64_BIG
return TARGET_64_BIG;
#else
gold_unreachable();
#endif
}
}
else
gold_unreachable();
}
// If output endianness is specified in command line, check that it does
// not conflict with the target.
void
Parameters::check_target_endianness()
{
General_options::Endianness endianness = this->options().endianness();
if (endianness != General_options::ENDIANNESS_NOT_SET)
{
bool big_endian;
if (endianness == General_options::ENDIANNESS_BIG)
big_endian = true;
else
{
gold_assert(endianness == General_options::ENDIANNESS_LITTLE);
big_endian = false;;
}
if (this->target().is_big_endian() != big_endian)
gold_error(_("input file does not match -EB/EL option"));
}
}
void
set_parameters_errors(Errors* errors)
{ static_parameters.set_errors(errors); }
void
set_parameters_options(const General_options* options)
{ static_parameters.set_options(options); }
void
set_parameters_target(Target* target)
{
static_parameters.set_target(target);
target->select_as_default_target();
}
void
set_parameters_doing_static_link(bool doing_static_link)
{ static_parameters.set_doing_static_link(doing_static_link); }
// Force the target to be valid by using the default. Use the
// --oformat option is set; this supports the x86_64 kernel build,
// which converts a binary file to an object file using -r --format
// binary --oformat elf32-i386 foo.o. Otherwise use the configured
// default.
void
parameters_force_valid_target()
{
if (parameters->target_valid())
return;
gold_assert(parameters->options_valid());
if (parameters->options().user_set_oformat())
{
Target* target = select_target_by_name(parameters->options().oformat());
if (target != NULL)
{
set_parameters_target(target);
return;
}
gold_error(_("unrecognized output format %s"),
parameters->options().oformat());
}
// The GOLD_DEFAULT_xx macros are defined by the configure script.
bool is_big_endian;
General_options::Endianness endianness = parameters->options().endianness();
if (endianness == General_options::ENDIANNESS_BIG)
is_big_endian = true;
else if (endianness == General_options::ENDIANNESS_LITTLE)
is_big_endian = false;
else
is_big_endian = GOLD_DEFAULT_BIG_ENDIAN;
Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE,
GOLD_DEFAULT_SIZE,
is_big_endian,
elfcpp::GOLD_DEFAULT_OSABI,
0);
gold_assert(target != NULL);
set_parameters_target(target);
}
// Clear the current target, for testing.
void
parameters_clear_target()
{
static_parameters.clear_target();
}
} // End namespace gold.