| // defstd.cc -- define standard symbols for gold. |
| |
| // Copyright (C) 2006-2024 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 |
| }, |
| { |
| "__stack", // name |
| ".stack", // output_section |
| 0, // value |
| 0, // size |
| elfcpp::STT_NOTYPE, // type |
| elfcpp::STB_GLOBAL, // binding |
| elfcpp::STV_DEFAULT, // visibility |
| 0, // nonvis |
| false, // 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 |
| }, |
| { |
| "__ehdr_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_HIDDEN, // 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 |
| true // 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. |