| 1 | // parameters.cc -- general parameters for a link using gold |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include "debug.h" |
| 26 | #include "options.h" |
| 27 | #include "target.h" |
| 28 | #include "target-select.h" |
| 29 | |
| 30 | namespace gold |
| 31 | { |
| 32 | |
| 33 | void |
| 34 | Parameters::set_errors(Errors* errors) |
| 35 | { |
| 36 | gold_assert(this->errors_ == NULL); |
| 37 | this->errors_ = errors; |
| 38 | } |
| 39 | |
| 40 | void |
| 41 | Parameters::set_options(const General_options* options) |
| 42 | { |
| 43 | gold_assert(!this->options_valid()); |
| 44 | this->options_ = options; |
| 45 | // For speed, we convert the options() debug var from a string to an |
| 46 | // enum (from debug.h). |
| 47 | this->debug_ = debug_string_to_enum(this->options().debug()); |
| 48 | // If --verbose is set, it acts as "--debug=files". |
| 49 | if (options->verbose()) |
| 50 | this->debug_ |= DEBUG_FILES; |
| 51 | } |
| 52 | |
| 53 | void |
| 54 | Parameters::set_doing_static_link(bool doing_static_link) |
| 55 | { |
| 56 | gold_assert(!this->doing_static_link_valid_); |
| 57 | this->doing_static_link_ = doing_static_link; |
| 58 | this->doing_static_link_valid_ = true; |
| 59 | } |
| 60 | |
| 61 | void |
| 62 | Parameters::set_target(const Target* target) |
| 63 | { |
| 64 | if (!this->target_valid()) |
| 65 | this->target_ = target; |
| 66 | else |
| 67 | gold_assert(target == this->target_); |
| 68 | } |
| 69 | |
| 70 | // The x86_64 kernel build converts a binary file to an object file |
| 71 | // using -r --format binary --oformat elf32-i386 foo.o. In order to |
| 72 | // support that for gold we support determining the default target |
| 73 | // choice from the output format. We recognize names that the GNU |
| 74 | // linker uses. |
| 75 | |
| 76 | const Target& |
| 77 | Parameters::default_target() const |
| 78 | { |
| 79 | gold_assert(this->options_valid()); |
| 80 | if (this->options().user_set_oformat()) |
| 81 | { |
| 82 | const Target* target |
| 83 | = select_target_by_name(this->options().oformat()); |
| 84 | if (target != NULL) |
| 85 | return *target; |
| 86 | |
| 87 | gold_error(_("unrecognized output format %s"), |
| 88 | this->options().oformat()); |
| 89 | } |
| 90 | |
| 91 | // The GOLD_DEFAULT_xx macros are defined by the configure script. |
| 92 | const Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE, |
| 93 | GOLD_DEFAULT_SIZE, |
| 94 | GOLD_DEFAULT_BIG_ENDIAN, |
| 95 | elfcpp::GOLD_DEFAULT_OSABI, |
| 96 | 0); |
| 97 | gold_assert(target != NULL); |
| 98 | return *target; |
| 99 | } |
| 100 | |
| 101 | // Return whether TARGET is compatible with the target we are using. |
| 102 | |
| 103 | bool |
| 104 | Parameters::is_compatible_target(const Target* target) const |
| 105 | { |
| 106 | if (this->target_ == NULL) |
| 107 | return true; |
| 108 | return target == this->target_; |
| 109 | } |
| 110 | |
| 111 | Parameters::Target_size_endianness |
| 112 | Parameters::size_and_endianness() const |
| 113 | { |
| 114 | if (this->target().get_size() == 32) |
| 115 | { |
| 116 | if (!this->target().is_big_endian()) |
| 117 | { |
| 118 | #ifdef HAVE_TARGET_32_LITTLE |
| 119 | return TARGET_32_LITTLE; |
| 120 | #else |
| 121 | gold_unreachable(); |
| 122 | #endif |
| 123 | } |
| 124 | else |
| 125 | { |
| 126 | #ifdef HAVE_TARGET_32_BIG |
| 127 | return TARGET_32_BIG; |
| 128 | #else |
| 129 | gold_unreachable(); |
| 130 | #endif |
| 131 | } |
| 132 | } |
| 133 | else if (parameters->target().get_size() == 64) |
| 134 | { |
| 135 | if (!parameters->target().is_big_endian()) |
| 136 | { |
| 137 | #ifdef HAVE_TARGET_64_LITTLE |
| 138 | return TARGET_64_LITTLE; |
| 139 | #else |
| 140 | gold_unreachable(); |
| 141 | #endif |
| 142 | } |
| 143 | else |
| 144 | { |
| 145 | #ifdef HAVE_TARGET_64_BIG |
| 146 | return TARGET_64_BIG; |
| 147 | #else |
| 148 | gold_unreachable(); |
| 149 | #endif |
| 150 | } |
| 151 | } |
| 152 | else |
| 153 | gold_unreachable(); |
| 154 | } |
| 155 | |
| 156 | |
| 157 | // Our local version of the variable, which is not const. |
| 158 | |
| 159 | static Parameters static_parameters; |
| 160 | |
| 161 | // The global variable. |
| 162 | |
| 163 | const Parameters* parameters = &static_parameters; |
| 164 | |
| 165 | void |
| 166 | set_parameters_errors(Errors* errors) |
| 167 | { static_parameters.set_errors(errors); } |
| 168 | |
| 169 | void |
| 170 | set_parameters_options(const General_options* options) |
| 171 | { static_parameters.set_options(options); } |
| 172 | |
| 173 | void |
| 174 | set_parameters_target(const Target* target) |
| 175 | { static_parameters.set_target(target); } |
| 176 | |
| 177 | void |
| 178 | set_parameters_doing_static_link(bool doing_static_link) |
| 179 | { static_parameters.set_doing_static_link(doing_static_link); } |
| 180 | |
| 181 | } // End namespace gold. |