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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gold/] [parameters.cc] - Rev 292
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// parameters.cc -- general parameters for a link using gold // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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), timer_(NULL), options_(NULL), target_(NULL), doing_static_link_valid_(false), doing_static_link_(false), debug_(0), incremental_mode_(General_options::INCREMENTAL_OFF), 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_timer(Timer* timer) { gold_assert(this->timer_ == NULL); this->timer_ = timer; } 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()); // Set incremental_mode_ based on the value of the --incremental option. // We copy the mode into parameters because it can change based on inputs. this->incremental_mode_ = this->options().incremental_mode(); // 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")); } } // Return the name of the entry symbol. const char* Parameters::entry() const { const char* ret = this->options().entry(); if (ret == NULL) { // FIXME: Need to support target specific entry symbol. ret = "_start"; } return ret; } // Set the incremental linking mode to INCREMENTAL_FULL. Used when // the linker determines that an incremental update is not possible. // Returns false if the incremental mode was INCREMENTAL_UPDATE, // indicating that the linker should exit if an update is not possible. bool Parameters::set_incremental_full() { gold_assert(this->incremental_mode_ != General_options::INCREMENTAL_OFF); if (this->incremental_mode_ == General_options::INCREMENTAL_UPDATE) return false; this->incremental_mode_ = General_options::INCREMENTAL_FULL; return true; } // Return true if we need to prepare incremental linking information. bool Parameters::incremental() const { return this->incremental_mode_ != General_options::INCREMENTAL_OFF; } // Return true if we are doing a full incremental link. bool Parameters::incremental_full() const { return this->incremental_mode_ == General_options::INCREMENTAL_FULL; } // Return true if we are doing an incremental update. bool Parameters::incremental_update() const { return (this->incremental_mode_ == General_options::INCREMENTAL_UPDATE || this->incremental_mode_ == General_options::INCREMENTAL_AUTO); } void set_parameters_errors(Errors* errors) { static_parameters.set_errors(errors); } void set_parameters_timer(Timer* timer) { static_parameters.set_timer(timer); } 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); } // Set the incremental linking mode to INCREMENTAL_FULL. Used when // the linker determines that an incremental update is not possible. // Returns false if the incremental mode was INCREMENTAL_UPDATE, // indicating that the linker should exit if an update is not possible. bool set_parameters_incremental_full() { return static_parameters.set_incremental_full(); } // 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()) { const char* bfd_name = parameters->options().oformat(); Target* target = select_target_by_bfd_name(bfd_name); if (target != NULL) { set_parameters_target(target); return; } gold_error(_("unrecognized output format %s"), bfd_name); } if (parameters->options().user_set_m()) { const char* emulation = parameters->options().m(); Target* target = select_target_by_emulation(emulation); if (target != NULL) { set_parameters_target(target); return; } gold_error(_("unrecognized emulation %s"), emulation); } // 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); if (target == NULL) { gold_assert(is_big_endian != GOLD_DEFAULT_BIG_ENDIAN); gold_fatal(_("no supported target for -EB/-EL option")); } set_parameters_target(target); } // Clear the current target, for testing. void parameters_clear_target() { static_parameters.clear_target(); } } // End namespace gold.
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