// defstd.cc -- define standard symbols for gold. // Copyright 2006, 2007 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 "symtab.h" #include "layout.h" #include "defstd.h" // This is a simple file which defines the standard symbols like // "_end". namespace { using namespace gold; const Define_symbol_in_section in_section[] = { { "__preinit_array_start", // name ".preinit_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis false, // offset_is_from_end true // only_if_ref }, { "__preinit_array_end", // name ".preinit_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis true, // offset_is_from_end true // only_if_ref }, { "__init_array_start", // name ".init_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis false, // offset_is_from_end true // only_if_ref }, { "__init_array_end", // name ".init_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis true, // offset_is_from_end true // only_if_ref }, { "__fini_array_start", // name ".fini_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis false, // offset_is_from_end true // only_if_ref }, { "__fini_array_end", // name ".fini_array", // output_section 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_HIDDEN, // visibility 0, // nonvis true, // offset_is_from_end true // only_if_ref } }; const int in_section_count = sizeof in_section / sizeof in_section[0]; const Define_symbol_in_segment in_segment[] = { { "__executable_start", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF(0), // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_START, // offset_from_base true // only_if_ref }, { "etext", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_X, // segment_flags_set elfcpp::PF_W, // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_END, // offset_from_base true // only_if_ref }, { "_etext", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_X, // segment_flags_set elfcpp::PF_W, // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_END, // offset_from_base true // only_if_ref }, { "__etext", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_X, // segment_flags_set elfcpp::PF_W, // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_END, // offset_from_base true // only_if_ref }, { "_edata", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_W, // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_BSS, // offset_from_base false // only_if_ref }, { "edata", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_W, // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_BSS, // offset_from_base true // only_if_ref }, { "__bss_start", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_W, // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_BSS, // offset_from_base false // only_if_ref }, { "_end", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_W, // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_END, // offset_from_base false // only_if_ref }, { "end", // name elfcpp::PT_LOAD, // segment_type elfcpp::PF_W, // segment_flags_set elfcpp::PF(0), // segment_flags_clear 0, // value 0, // size elfcpp::STT_NOTYPE, // type elfcpp::STB_GLOBAL, // binding elfcpp::STV_DEFAULT, // visibility 0, // nonvis Symbol::SEGMENT_END, // offset_from_base false // only_if_ref } }; const int in_segment_count = sizeof in_segment / sizeof in_segment[0]; } // End anonymous namespace. namespace gold { void define_standard_symbols(Symbol_table* symtab, const Layout* layout) { bool saw_sections_clause = layout->script_options()->saw_sections_clause(); symtab->define_symbols(layout, in_section_count, in_section, saw_sections_clause); symtab->define_symbols(layout, in_segment_count, in_segment, saw_sections_clause); } } // End namespace gold.