| 1 | // defstd.cc -- define standard symbols for gold. |
| 2 | |
| 3 | // Copyright 2006, 2007 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 "symtab.h" |
| 26 | #include "defstd.h" |
| 27 | |
| 28 | // This is a simple file which defines the standard symbols like |
| 29 | // "_end". |
| 30 | |
| 31 | namespace |
| 32 | { |
| 33 | |
| 34 | using namespace gold; |
| 35 | |
| 36 | const Define_symbol_in_section in_section[] = |
| 37 | { |
| 38 | { |
| 39 | "__preinit_array_start", // name |
| 40 | ".preinit_array", // output_section |
| 41 | 0, // value |
| 42 | 0, // size |
| 43 | elfcpp::STT_NOTYPE, // type |
| 44 | elfcpp::STB_GLOBAL, // binding |
| 45 | elfcpp::STV_HIDDEN, // visibility |
| 46 | 0, // nonvis |
| 47 | false, // offset_is_from_end |
| 48 | true // only_if_ref |
| 49 | }, |
| 50 | { |
| 51 | "__preinit_array_end", // name |
| 52 | ".preinit_array", // output_section |
| 53 | 0, // value |
| 54 | 0, // size |
| 55 | elfcpp::STT_NOTYPE, // type |
| 56 | elfcpp::STB_GLOBAL, // binding |
| 57 | elfcpp::STV_HIDDEN, // visibility |
| 58 | 0, // nonvis |
| 59 | true, // offset_is_from_end |
| 60 | true // only_if_ref |
| 61 | }, |
| 62 | { |
| 63 | "__init_array_start", // name |
| 64 | ".init_array", // output_section |
| 65 | 0, // value |
| 66 | 0, // size |
| 67 | elfcpp::STT_NOTYPE, // type |
| 68 | elfcpp::STB_GLOBAL, // binding |
| 69 | elfcpp::STV_HIDDEN, // visibility |
| 70 | 0, // nonvis |
| 71 | false, // offset_is_from_end |
| 72 | true // only_if_ref |
| 73 | }, |
| 74 | { |
| 75 | "__init_array_end", // name |
| 76 | ".init_array", // output_section |
| 77 | 0, // value |
| 78 | 0, // size |
| 79 | elfcpp::STT_NOTYPE, // type |
| 80 | elfcpp::STB_GLOBAL, // binding |
| 81 | elfcpp::STV_HIDDEN, // visibility |
| 82 | 0, // nonvis |
| 83 | true, // offset_is_from_end |
| 84 | true // only_if_ref |
| 85 | }, |
| 86 | { |
| 87 | "__fini_array_start", // name |
| 88 | ".fini_array", // output_section |
| 89 | 0, // value |
| 90 | 0, // size |
| 91 | elfcpp::STT_NOTYPE, // type |
| 92 | elfcpp::STB_GLOBAL, // binding |
| 93 | elfcpp::STV_HIDDEN, // visibility |
| 94 | 0, // nonvis |
| 95 | false, // offset_is_from_end |
| 96 | true // only_if_ref |
| 97 | }, |
| 98 | { |
| 99 | "__fini_array_end", // name |
| 100 | ".fini_array", // output_section |
| 101 | 0, // value |
| 102 | 0, // size |
| 103 | elfcpp::STT_NOTYPE, // type |
| 104 | elfcpp::STB_GLOBAL, // binding |
| 105 | elfcpp::STV_HIDDEN, // visibility |
| 106 | 0, // nonvis |
| 107 | true, // offset_is_from_end |
| 108 | true // only_if_ref |
| 109 | } |
| 110 | }; |
| 111 | |
| 112 | const int in_section_count = sizeof in_section / sizeof in_section[0]; |
| 113 | |
| 114 | const Define_symbol_in_segment in_segment[] = |
| 115 | { |
| 116 | { |
| 117 | "__executable_start", // name |
| 118 | elfcpp::PT_LOAD, // segment_type |
| 119 | elfcpp::PF(0), // segment_flags_set |
| 120 | elfcpp::PF(0), // segment_flags_clear |
| 121 | 0, // value |
| 122 | 0, // size |
| 123 | elfcpp::STT_NOTYPE, // type |
| 124 | elfcpp::STB_GLOBAL, // binding |
| 125 | elfcpp::STV_DEFAULT, // visibility |
| 126 | 0, // nonvis |
| 127 | Symbol::SEGMENT_START, // offset_from_base |
| 128 | true // only_if_ref |
| 129 | }, |
| 130 | { |
| 131 | "etext", // name |
| 132 | elfcpp::PT_LOAD, // segment_type |
| 133 | elfcpp::PF_X, // segment_flags_set |
| 134 | elfcpp::PF_W, // segment_flags_clear |
| 135 | 0, // value |
| 136 | 0, // size |
| 137 | elfcpp::STT_NOTYPE, // type |
| 138 | elfcpp::STB_GLOBAL, // binding |
| 139 | elfcpp::STV_DEFAULT, // visibility |
| 140 | 0, // nonvis |
| 141 | Symbol::SEGMENT_END, // offset_from_base |
| 142 | true // only_if_ref |
| 143 | }, |
| 144 | { |
| 145 | "_etext", // name |
| 146 | elfcpp::PT_LOAD, // segment_type |
| 147 | elfcpp::PF_X, // segment_flags_set |
| 148 | elfcpp::PF_W, // segment_flags_clear |
| 149 | 0, // value |
| 150 | 0, // size |
| 151 | elfcpp::STT_NOTYPE, // type |
| 152 | elfcpp::STB_GLOBAL, // binding |
| 153 | elfcpp::STV_DEFAULT, // visibility |
| 154 | 0, // nonvis |
| 155 | Symbol::SEGMENT_END, // offset_from_base |
| 156 | true // only_if_ref |
| 157 | }, |
| 158 | { |
| 159 | "__etext", // name |
| 160 | elfcpp::PT_LOAD, // segment_type |
| 161 | elfcpp::PF_X, // segment_flags_set |
| 162 | elfcpp::PF_W, // segment_flags_clear |
| 163 | 0, // value |
| 164 | 0, // size |
| 165 | elfcpp::STT_NOTYPE, // type |
| 166 | elfcpp::STB_GLOBAL, // binding |
| 167 | elfcpp::STV_DEFAULT, // visibility |
| 168 | 0, // nonvis |
| 169 | Symbol::SEGMENT_END, // offset_from_base |
| 170 | true // only_if_ref |
| 171 | }, |
| 172 | { |
| 173 | "_edata", // name |
| 174 | elfcpp::PT_LOAD, // segment_type |
| 175 | elfcpp::PF_W, // segment_flags_set |
| 176 | elfcpp::PF(0), // segment_flags_clear |
| 177 | 0, // value |
| 178 | 0, // size |
| 179 | elfcpp::STT_NOTYPE, // type |
| 180 | elfcpp::STB_GLOBAL, // binding |
| 181 | elfcpp::STV_DEFAULT, // visibility |
| 182 | 0, // nonvis |
| 183 | Symbol::SEGMENT_BSS, // offset_from_base |
| 184 | false // only_if_ref |
| 185 | }, |
| 186 | { |
| 187 | "edata", // name |
| 188 | elfcpp::PT_LOAD, // segment_type |
| 189 | elfcpp::PF_W, // segment_flags_set |
| 190 | elfcpp::PF(0), // segment_flags_clear |
| 191 | 0, // value |
| 192 | 0, // size |
| 193 | elfcpp::STT_NOTYPE, // type |
| 194 | elfcpp::STB_GLOBAL, // binding |
| 195 | elfcpp::STV_DEFAULT, // visibility |
| 196 | 0, // nonvis |
| 197 | Symbol::SEGMENT_BSS, // offset_from_base |
| 198 | true // only_if_ref |
| 199 | }, |
| 200 | { |
| 201 | "__bss_start", // name |
| 202 | elfcpp::PT_LOAD, // segment_type |
| 203 | elfcpp::PF_W, // segment_flags_set |
| 204 | elfcpp::PF(0), // segment_flags_clear |
| 205 | 0, // value |
| 206 | 0, // size |
| 207 | elfcpp::STT_NOTYPE, // type |
| 208 | elfcpp::STB_GLOBAL, // binding |
| 209 | elfcpp::STV_DEFAULT, // visibility |
| 210 | 0, // nonvis |
| 211 | Symbol::SEGMENT_BSS, // offset_from_base |
| 212 | false // only_if_ref |
| 213 | }, |
| 214 | { |
| 215 | "_end", // name |
| 216 | elfcpp::PT_LOAD, // segment_type |
| 217 | elfcpp::PF_W, // segment_flags_set |
| 218 | elfcpp::PF(0), // segment_flags_clear |
| 219 | 0, // value |
| 220 | 0, // size |
| 221 | elfcpp::STT_NOTYPE, // type |
| 222 | elfcpp::STB_GLOBAL, // binding |
| 223 | elfcpp::STV_DEFAULT, // visibility |
| 224 | 0, // nonvis |
| 225 | Symbol::SEGMENT_END, // offset_from_base |
| 226 | false // only_if_ref |
| 227 | }, |
| 228 | { |
| 229 | "end", // name |
| 230 | elfcpp::PT_LOAD, // segment_type |
| 231 | elfcpp::PF_W, // segment_flags_set |
| 232 | elfcpp::PF(0), // segment_flags_clear |
| 233 | 0, // value |
| 234 | 0, // size |
| 235 | elfcpp::STT_NOTYPE, // type |
| 236 | elfcpp::STB_GLOBAL, // binding |
| 237 | elfcpp::STV_DEFAULT, // visibility |
| 238 | 0, // nonvis |
| 239 | Symbol::SEGMENT_END, // offset_from_base |
| 240 | false // only_if_ref |
| 241 | } |
| 242 | }; |
| 243 | |
| 244 | const int in_segment_count = sizeof in_segment / sizeof in_segment[0]; |
| 245 | |
| 246 | } // End anonymous namespace. |
| 247 | |
| 248 | namespace gold |
| 249 | { |
| 250 | |
| 251 | void |
| 252 | define_standard_symbols(Symbol_table* symtab, const Layout* layout, |
| 253 | Target* target) |
| 254 | { |
| 255 | symtab->define_symbols(layout, target, in_section_count, in_section); |
| 256 | symtab->define_symbols(layout, target, in_segment_count, in_segment); |
| 257 | } |
| 258 | |
| 259 | } // End namespace gold. |