| 1 | // inremental.cc -- incremental linking support for gold |
| 2 | |
| 3 | // Copyright (C) 2009-2018 Free Software Foundation, Inc. |
| 4 | // Written by Mikolaj Zalewski <mikolajz@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 <set> |
| 26 | #include <cstdarg> |
| 27 | #include "libiberty.h" |
| 28 | |
| 29 | #include "elfcpp.h" |
| 30 | #include "options.h" |
| 31 | #include "output.h" |
| 32 | #include "symtab.h" |
| 33 | #include "incremental.h" |
| 34 | #include "archive.h" |
| 35 | #include "object.h" |
| 36 | #include "target-select.h" |
| 37 | #include "target.h" |
| 38 | #include "fileread.h" |
| 39 | #include "script.h" |
| 40 | |
| 41 | namespace gold { |
| 42 | |
| 43 | // Version number for the .gnu_incremental_inputs section. |
| 44 | // Version 1 was the initial checkin. |
| 45 | // Version 2 adds some padding to ensure 8-byte alignment where necessary. |
| 46 | const unsigned int INCREMENTAL_LINK_VERSION = 2; |
| 47 | |
| 48 | // This class manages the .gnu_incremental_inputs section, which holds |
| 49 | // the header information, a directory of input files, and separate |
| 50 | // entries for each input file. |
| 51 | |
| 52 | template<int size, bool big_endian> |
| 53 | class Output_section_incremental_inputs : public Output_section_data |
| 54 | { |
| 55 | public: |
| 56 | Output_section_incremental_inputs(const Incremental_inputs* inputs, |
| 57 | const Symbol_table* symtab) |
| 58 | : Output_section_data(size / 8), inputs_(inputs), symtab_(symtab) |
| 59 | { } |
| 60 | |
| 61 | protected: |
| 62 | // This is called to update the section size prior to assigning |
| 63 | // the address and file offset. |
| 64 | void |
| 65 | update_data_size() |
| 66 | { this->set_final_data_size(); } |
| 67 | |
| 68 | // Set the final data size. |
| 69 | void |
| 70 | set_final_data_size(); |
| 71 | |
| 72 | // Write the data to the file. |
| 73 | void |
| 74 | do_write(Output_file*); |
| 75 | |
| 76 | // Write to a map file. |
| 77 | void |
| 78 | do_print_to_mapfile(Mapfile* mapfile) const |
| 79 | { mapfile->print_output_data(this, _("** incremental_inputs")); } |
| 80 | |
| 81 | private: |
| 82 | // Write the section header. |
| 83 | unsigned char* |
| 84 | write_header(unsigned char* pov, unsigned int input_file_count, |
| 85 | section_offset_type command_line_offset); |
| 86 | |
| 87 | // Write the input file entries. |
| 88 | unsigned char* |
| 89 | write_input_files(unsigned char* oview, unsigned char* pov, |
| 90 | Stringpool* strtab); |
| 91 | |
| 92 | // Write the supplemental information blocks. |
| 93 | unsigned char* |
| 94 | write_info_blocks(unsigned char* oview, unsigned char* pov, |
| 95 | Stringpool* strtab, unsigned int* global_syms, |
| 96 | unsigned int global_sym_count); |
| 97 | |
| 98 | // Write the contents of the .gnu_incremental_symtab section. |
| 99 | void |
| 100 | write_symtab(unsigned char* pov, unsigned int* global_syms, |
| 101 | unsigned int global_sym_count); |
| 102 | |
| 103 | // Write the contents of the .gnu_incremental_got_plt section. |
| 104 | void |
| 105 | write_got_plt(unsigned char* pov, off_t view_size); |
| 106 | |
| 107 | // Typedefs for writing the data to the output sections. |
| 108 | typedef elfcpp::Swap<size, big_endian> Swap; |
| 109 | typedef elfcpp::Swap<16, big_endian> Swap16; |
| 110 | typedef elfcpp::Swap<32, big_endian> Swap32; |
| 111 | typedef elfcpp::Swap<64, big_endian> Swap64; |
| 112 | |
| 113 | // Sizes of various structures. |
| 114 | static const int sizeof_addr = size / 8; |
| 115 | static const int header_size = |
| 116 | Incremental_inputs_reader<size, big_endian>::header_size; |
| 117 | static const int input_entry_size = |
| 118 | Incremental_inputs_reader<size, big_endian>::input_entry_size; |
| 119 | static const unsigned int object_info_size = |
| 120 | Incremental_inputs_reader<size, big_endian>::object_info_size; |
| 121 | static const unsigned int input_section_entry_size = |
| 122 | Incremental_inputs_reader<size, big_endian>::input_section_entry_size; |
| 123 | static const unsigned int global_sym_entry_size = |
| 124 | Incremental_inputs_reader<size, big_endian>::global_sym_entry_size; |
| 125 | static const unsigned int incr_reloc_size = |
| 126 | Incremental_relocs_reader<size, big_endian>::reloc_size; |
| 127 | |
| 128 | // The Incremental_inputs object. |
| 129 | const Incremental_inputs* inputs_; |
| 130 | |
| 131 | // The symbol table. |
| 132 | const Symbol_table* symtab_; |
| 133 | }; |
| 134 | |
| 135 | // Inform the user why we don't do an incremental link. Not called in |
| 136 | // the obvious case of missing output file. TODO: Is this helpful? |
| 137 | |
| 138 | void |
| 139 | vexplain_no_incremental(const char* format, va_list args) |
| 140 | { |
| 141 | char* buf = NULL; |
| 142 | if (vasprintf(&buf, format, args) < 0) |
| 143 | gold_nomem(); |
| 144 | gold_info(_("the link might take longer: " |
| 145 | "cannot perform incremental link: %s"), buf); |
| 146 | free(buf); |
| 147 | } |
| 148 | |
| 149 | void |
| 150 | explain_no_incremental(const char* format, ...) |
| 151 | { |
| 152 | va_list args; |
| 153 | va_start(args, format); |
| 154 | vexplain_no_incremental(format, args); |
| 155 | va_end(args); |
| 156 | } |
| 157 | |
| 158 | // Report an error. |
| 159 | |
| 160 | void |
| 161 | Incremental_binary::error(const char* format, ...) const |
| 162 | { |
| 163 | va_list args; |
| 164 | va_start(args, format); |
| 165 | // Current code only checks if the file can be used for incremental linking, |
| 166 | // so errors shouldn't fail the build, but only result in a fallback to a |
| 167 | // full build. |
| 168 | // TODO: when we implement incremental editing of the file, we may need a |
| 169 | // flag that will cause errors to be treated seriously. |
| 170 | vexplain_no_incremental(format, args); |
| 171 | va_end(args); |
| 172 | } |
| 173 | |
| 174 | // Return TRUE if a section of type SH_TYPE can be updated in place |
| 175 | // during an incremental update. We can update sections of type PROGBITS, |
| 176 | // NOBITS, INIT_ARRAY, FINI_ARRAY, PREINIT_ARRAY, NOTE, and |
| 177 | // (processor-specific) unwind sections. All others will be regenerated. |
| 178 | |
| 179 | bool |
| 180 | can_incremental_update(unsigned int sh_type) |
| 181 | { |
| 182 | return (sh_type == elfcpp::SHT_PROGBITS |
| 183 | || sh_type == elfcpp::SHT_NOBITS |
| 184 | || sh_type == elfcpp::SHT_INIT_ARRAY |
| 185 | || sh_type == elfcpp::SHT_FINI_ARRAY |
| 186 | || sh_type == elfcpp::SHT_PREINIT_ARRAY |
| 187 | || sh_type == elfcpp::SHT_NOTE |
| 188 | || sh_type == parameters->target().unwind_section_type()); |
| 189 | } |
| 190 | |
| 191 | // Find the .gnu_incremental_inputs section and related sections. |
| 192 | |
| 193 | template<int size, bool big_endian> |
| 194 | bool |
| 195 | Sized_incremental_binary<size, big_endian>::find_incremental_inputs_sections( |
| 196 | unsigned int* p_inputs_shndx, |
| 197 | unsigned int* p_symtab_shndx, |
| 198 | unsigned int* p_relocs_shndx, |
| 199 | unsigned int* p_got_plt_shndx, |
| 200 | unsigned int* p_strtab_shndx) |
| 201 | { |
| 202 | unsigned int inputs_shndx = |
| 203 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_INPUTS); |
| 204 | if (inputs_shndx == elfcpp::SHN_UNDEF) // Not found. |
| 205 | return false; |
| 206 | |
| 207 | unsigned int symtab_shndx = |
| 208 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_SYMTAB); |
| 209 | if (symtab_shndx == elfcpp::SHN_UNDEF) // Not found. |
| 210 | return false; |
| 211 | if (this->elf_file_.section_link(symtab_shndx) != inputs_shndx) |
| 212 | return false; |
| 213 | |
| 214 | unsigned int relocs_shndx = |
| 215 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_RELOCS); |
| 216 | if (relocs_shndx == elfcpp::SHN_UNDEF) // Not found. |
| 217 | return false; |
| 218 | if (this->elf_file_.section_link(relocs_shndx) != inputs_shndx) |
| 219 | return false; |
| 220 | |
| 221 | unsigned int got_plt_shndx = |
| 222 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_GOT_PLT); |
| 223 | if (got_plt_shndx == elfcpp::SHN_UNDEF) // Not found. |
| 224 | return false; |
| 225 | if (this->elf_file_.section_link(got_plt_shndx) != inputs_shndx) |
| 226 | return false; |
| 227 | |
| 228 | unsigned int strtab_shndx = this->elf_file_.section_link(inputs_shndx); |
| 229 | if (strtab_shndx == elfcpp::SHN_UNDEF |
| 230 | || strtab_shndx > this->elf_file_.shnum() |
| 231 | || this->elf_file_.section_type(strtab_shndx) != elfcpp::SHT_STRTAB) |
| 232 | return false; |
| 233 | |
| 234 | if (p_inputs_shndx != NULL) |
| 235 | *p_inputs_shndx = inputs_shndx; |
| 236 | if (p_symtab_shndx != NULL) |
| 237 | *p_symtab_shndx = symtab_shndx; |
| 238 | if (p_relocs_shndx != NULL) |
| 239 | *p_relocs_shndx = relocs_shndx; |
| 240 | if (p_got_plt_shndx != NULL) |
| 241 | *p_got_plt_shndx = got_plt_shndx; |
| 242 | if (p_strtab_shndx != NULL) |
| 243 | *p_strtab_shndx = strtab_shndx; |
| 244 | return true; |
| 245 | } |
| 246 | |
| 247 | // Set up the readers into the incremental info sections. |
| 248 | |
| 249 | template<int size, bool big_endian> |
| 250 | void |
| 251 | Sized_incremental_binary<size, big_endian>::setup_readers() |
| 252 | { |
| 253 | unsigned int inputs_shndx; |
| 254 | unsigned int symtab_shndx; |
| 255 | unsigned int relocs_shndx; |
| 256 | unsigned int got_plt_shndx; |
| 257 | unsigned int strtab_shndx; |
| 258 | |
| 259 | if (!this->find_incremental_inputs_sections(&inputs_shndx, &symtab_shndx, |
| 260 | &relocs_shndx, &got_plt_shndx, |
| 261 | &strtab_shndx)) |
| 262 | return; |
| 263 | |
| 264 | Location inputs_location(this->elf_file_.section_contents(inputs_shndx)); |
| 265 | Location symtab_location(this->elf_file_.section_contents(symtab_shndx)); |
| 266 | Location relocs_location(this->elf_file_.section_contents(relocs_shndx)); |
| 267 | Location got_plt_location(this->elf_file_.section_contents(got_plt_shndx)); |
| 268 | Location strtab_location(this->elf_file_.section_contents(strtab_shndx)); |
| 269 | |
| 270 | View inputs_view = this->view(inputs_location); |
| 271 | View symtab_view = this->view(symtab_location); |
| 272 | View relocs_view = this->view(relocs_location); |
| 273 | View got_plt_view = this->view(got_plt_location); |
| 274 | View strtab_view = this->view(strtab_location); |
| 275 | |
| 276 | elfcpp::Elf_strtab strtab(strtab_view.data(), strtab_location.data_size); |
| 277 | |
| 278 | this->inputs_reader_ = |
| 279 | Incremental_inputs_reader<size, big_endian>(inputs_view.data(), strtab); |
| 280 | this->symtab_reader_ = |
| 281 | Incremental_symtab_reader<big_endian>(symtab_view.data(), |
| 282 | symtab_location.data_size); |
| 283 | this->relocs_reader_ = |
| 284 | Incremental_relocs_reader<size, big_endian>(relocs_view.data(), |
| 285 | relocs_location.data_size); |
| 286 | this->got_plt_reader_ = |
| 287 | Incremental_got_plt_reader<big_endian>(got_plt_view.data()); |
| 288 | |
| 289 | // Find the main symbol table. |
| 290 | unsigned int main_symtab_shndx = |
| 291 | this->elf_file_.find_section_by_type(elfcpp::SHT_SYMTAB); |
| 292 | gold_assert(main_symtab_shndx != elfcpp::SHN_UNDEF); |
| 293 | this->main_symtab_loc_ = this->elf_file_.section_contents(main_symtab_shndx); |
| 294 | |
| 295 | // Find the main symbol string table. |
| 296 | unsigned int main_strtab_shndx = |
| 297 | this->elf_file_.section_link(main_symtab_shndx); |
| 298 | gold_assert(main_strtab_shndx != elfcpp::SHN_UNDEF |
| 299 | && main_strtab_shndx < this->elf_file_.shnum()); |
| 300 | this->main_strtab_loc_ = this->elf_file_.section_contents(main_strtab_shndx); |
| 301 | |
| 302 | // Walk the list of input files (a) to setup an Input_reader for each |
| 303 | // input file, and (b) to record maps of files added from archive |
| 304 | // libraries and scripts. |
| 305 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; |
| 306 | unsigned int count = inputs.input_file_count(); |
| 307 | this->input_objects_.resize(count); |
| 308 | this->input_entry_readers_.reserve(count); |
| 309 | this->library_map_.resize(count); |
| 310 | this->script_map_.resize(count); |
| 311 | for (unsigned int i = 0; i < count; i++) |
| 312 | { |
| 313 | Input_entry_reader input_file = inputs.input_file(i); |
| 314 | this->input_entry_readers_.push_back(Sized_input_reader(input_file)); |
| 315 | switch (input_file.type()) |
| 316 | { |
| 317 | case INCREMENTAL_INPUT_OBJECT: |
| 318 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: |
| 319 | case INCREMENTAL_INPUT_SHARED_LIBRARY: |
| 320 | // No special treatment necessary. |
| 321 | break; |
| 322 | case INCREMENTAL_INPUT_ARCHIVE: |
| 323 | { |
| 324 | Incremental_library* lib = |
| 325 | new Incremental_library(input_file.filename(), i, |
| 326 | &this->input_entry_readers_[i]); |
| 327 | this->library_map_[i] = lib; |
| 328 | unsigned int member_count = input_file.get_member_count(); |
| 329 | for (unsigned int j = 0; j < member_count; j++) |
| 330 | { |
| 331 | int member_offset = input_file.get_member_offset(j); |
| 332 | int member_index = inputs.input_file_index(member_offset); |
| 333 | this->library_map_[member_index] = lib; |
| 334 | } |
| 335 | } |
| 336 | break; |
| 337 | case INCREMENTAL_INPUT_SCRIPT: |
| 338 | { |
| 339 | Script_info* script = new Script_info(input_file.filename(), i); |
| 340 | this->script_map_[i] = script; |
| 341 | unsigned int object_count = input_file.get_object_count(); |
| 342 | for (unsigned int j = 0; j < object_count; j++) |
| 343 | { |
| 344 | int object_offset = input_file.get_object_offset(j); |
| 345 | int object_index = inputs.input_file_index(object_offset); |
| 346 | this->script_map_[object_index] = script; |
| 347 | } |
| 348 | } |
| 349 | break; |
| 350 | default: |
| 351 | gold_unreachable(); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | // Initialize the map of global symbols. |
| 356 | unsigned int nglobals = this->symtab_reader_.symbol_count(); |
| 357 | this->symbol_map_.resize(nglobals); |
| 358 | |
| 359 | this->has_incremental_info_ = true; |
| 360 | } |
| 361 | |
| 362 | // Walk the list of input files given on the command line, and build |
| 363 | // a direct map of file index to the corresponding input argument. |
| 364 | |
| 365 | void |
| 366 | check_input_args(std::vector<const Input_argument*>& input_args_map, |
| 367 | Input_arguments::const_iterator begin, |
| 368 | Input_arguments::const_iterator end) |
| 369 | { |
| 370 | for (Input_arguments::const_iterator p = begin; |
| 371 | p != end; |
| 372 | ++p) |
| 373 | { |
| 374 | if (p->is_group()) |
| 375 | { |
| 376 | const Input_file_group* group = p->group(); |
| 377 | check_input_args(input_args_map, group->begin(), group->end()); |
| 378 | } |
| 379 | else if (p->is_lib()) |
| 380 | { |
| 381 | const Input_file_lib* lib = p->lib(); |
| 382 | check_input_args(input_args_map, lib->begin(), lib->end()); |
| 383 | } |
| 384 | else |
| 385 | { |
| 386 | gold_assert(p->is_file()); |
| 387 | unsigned int arg_serial = p->file().arg_serial(); |
| 388 | if (arg_serial > 0) |
| 389 | { |
| 390 | gold_assert(arg_serial <= input_args_map.size()); |
| 391 | gold_assert(input_args_map[arg_serial - 1] == 0); |
| 392 | input_args_map[arg_serial - 1] = &*p; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | // Determine whether an incremental link based on the existing output file |
| 399 | // can be done. |
| 400 | |
| 401 | template<int size, bool big_endian> |
| 402 | bool |
| 403 | Sized_incremental_binary<size, big_endian>::do_check_inputs( |
| 404 | const Command_line& cmdline, |
| 405 | Incremental_inputs* incremental_inputs) |
| 406 | { |
| 407 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; |
| 408 | |
| 409 | if (!this->has_incremental_info_) |
| 410 | { |
| 411 | explain_no_incremental(_("no incremental data from previous build")); |
| 412 | return false; |
| 413 | } |
| 414 | |
| 415 | if (inputs.version() != INCREMENTAL_LINK_VERSION) |
| 416 | { |
| 417 | explain_no_incremental(_("different version of incremental build data")); |
| 418 | return false; |
| 419 | } |
| 420 | |
| 421 | if (incremental_inputs->command_line() != inputs.command_line()) |
| 422 | { |
| 423 | gold_debug(DEBUG_INCREMENTAL, |
| 424 | "old command line: %s", |
| 425 | inputs.command_line()); |
| 426 | gold_debug(DEBUG_INCREMENTAL, |
| 427 | "new command line: %s", |
| 428 | incremental_inputs->command_line().c_str()); |
| 429 | explain_no_incremental(_("command line changed")); |
| 430 | return false; |
| 431 | } |
| 432 | |
| 433 | // Walk the list of input files given on the command line, and build |
| 434 | // a direct map of argument serial numbers to the corresponding input |
| 435 | // arguments. |
| 436 | this->input_args_map_.resize(cmdline.number_of_input_files()); |
| 437 | check_input_args(this->input_args_map_, cmdline.begin(), cmdline.end()); |
| 438 | |
| 439 | // Walk the list of input files to check for conditions that prevent |
| 440 | // an incremental update link. |
| 441 | unsigned int count = inputs.input_file_count(); |
| 442 | for (unsigned int i = 0; i < count; i++) |
| 443 | { |
| 444 | Input_entry_reader input_file = inputs.input_file(i); |
| 445 | switch (input_file.type()) |
| 446 | { |
| 447 | case INCREMENTAL_INPUT_OBJECT: |
| 448 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: |
| 449 | case INCREMENTAL_INPUT_SHARED_LIBRARY: |
| 450 | case INCREMENTAL_INPUT_ARCHIVE: |
| 451 | // No special treatment necessary. |
| 452 | break; |
| 453 | case INCREMENTAL_INPUT_SCRIPT: |
| 454 | if (this->do_file_has_changed(i)) |
| 455 | { |
| 456 | explain_no_incremental(_("%s: script file changed"), |
| 457 | input_file.filename()); |
| 458 | return false; |
| 459 | } |
| 460 | break; |
| 461 | default: |
| 462 | gold_unreachable(); |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | return true; |
| 467 | } |
| 468 | |
| 469 | // Return TRUE if input file N has changed since the last incremental link. |
| 470 | |
| 471 | template<int size, bool big_endian> |
| 472 | bool |
| 473 | Sized_incremental_binary<size, big_endian>::do_file_has_changed( |
| 474 | unsigned int n) const |
| 475 | { |
| 476 | Input_entry_reader input_file = this->inputs_reader_.input_file(n); |
| 477 | Incremental_disposition disp = INCREMENTAL_CHECK; |
| 478 | |
| 479 | // For files named in scripts, find the file that was actually named |
| 480 | // on the command line, so that we can get the incremental disposition |
| 481 | // flag. |
| 482 | Script_info* script = this->get_script_info(n); |
| 483 | if (script != NULL) |
| 484 | n = script->input_file_index(); |
| 485 | |
| 486 | const Input_argument* input_argument = this->get_input_argument(n); |
| 487 | if (input_argument != NULL) |
| 488 | disp = input_argument->file().options().incremental_disposition(); |
| 489 | |
| 490 | // For files at the beginning of the command line (i.e., those added |
| 491 | // implicitly by gcc), check whether the --incremental-startup-unchanged |
| 492 | // option was used. |
| 493 | if (disp == INCREMENTAL_STARTUP) |
| 494 | disp = parameters->options().incremental_startup_disposition(); |
| 495 | |
| 496 | if (disp != INCREMENTAL_CHECK) |
| 497 | return disp == INCREMENTAL_CHANGED; |
| 498 | |
| 499 | const char* filename = input_file.filename(); |
| 500 | Timespec old_mtime = input_file.get_mtime(); |
| 501 | Timespec new_mtime; |
| 502 | if (!get_mtime(filename, &new_mtime)) |
| 503 | { |
| 504 | // If we can't open get the current modification time, assume it has |
| 505 | // changed. If the file doesn't exist, we'll issue an error when we |
| 506 | // try to open it later. |
| 507 | return true; |
| 508 | } |
| 509 | |
| 510 | if (new_mtime.seconds > old_mtime.seconds) |
| 511 | return true; |
| 512 | if (new_mtime.seconds == old_mtime.seconds |
| 513 | && new_mtime.nanoseconds > old_mtime.nanoseconds) |
| 514 | return true; |
| 515 | return false; |
| 516 | } |
| 517 | |
| 518 | // Initialize the layout of the output file based on the existing |
| 519 | // output file. |
| 520 | |
| 521 | template<int size, bool big_endian> |
| 522 | void |
| 523 | Sized_incremental_binary<size, big_endian>::do_init_layout(Layout* layout) |
| 524 | { |
| 525 | typedef elfcpp::Shdr<size, big_endian> Shdr; |
| 526 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
| 527 | |
| 528 | // Get views of the section headers and the section string table. |
| 529 | const off_t shoff = this->elf_file_.shoff(); |
| 530 | const unsigned int shnum = this->elf_file_.shnum(); |
| 531 | const unsigned int shstrndx = this->elf_file_.shstrndx(); |
| 532 | Location shdrs_location(shoff, shnum * shdr_size); |
| 533 | Location shstrndx_location(this->elf_file_.section_contents(shstrndx)); |
| 534 | View shdrs_view = this->view(shdrs_location); |
| 535 | View shstrndx_view = this->view(shstrndx_location); |
| 536 | elfcpp::Elf_strtab shstrtab(shstrndx_view.data(), |
| 537 | shstrndx_location.data_size); |
| 538 | |
| 539 | layout->set_incremental_base(this); |
| 540 | |
| 541 | // Initialize the layout. |
| 542 | this->section_map_.resize(shnum); |
| 543 | const unsigned char* pshdr = shdrs_view.data() + shdr_size; |
| 544 | for (unsigned int i = 1; i < shnum; i++) |
| 545 | { |
| 546 | Shdr shdr(pshdr); |
| 547 | const char* name; |
| 548 | if (!shstrtab.get_c_string(shdr.get_sh_name(), &name)) |
| 549 | name = NULL; |
| 550 | gold_debug(DEBUG_INCREMENTAL, |
| 551 | "Output section: %2d %08lx %08lx %08lx %3d %s", |
| 552 | i, |
| 553 | static_cast<long>(shdr.get_sh_addr()), |
| 554 | static_cast<long>(shdr.get_sh_offset()), |
| 555 | static_cast<long>(shdr.get_sh_size()), |
| 556 | shdr.get_sh_type(), name ? name : "<null>"); |
| 557 | this->section_map_[i] = layout->init_fixed_output_section(name, shdr); |
| 558 | pshdr += shdr_size; |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | // Mark regions of the input file that must be kept unchanged. |
| 563 | |
| 564 | template<int size, bool big_endian> |
| 565 | void |
| 566 | Sized_incremental_binary<size, big_endian>::do_reserve_layout( |
| 567 | unsigned int input_file_index) |
| 568 | { |
| 569 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 570 | |
| 571 | Input_entry_reader input_file = |
| 572 | this->inputs_reader_.input_file(input_file_index); |
| 573 | |
| 574 | if (input_file.type() == INCREMENTAL_INPUT_SHARED_LIBRARY) |
| 575 | { |
| 576 | // Reserve the BSS space used for COPY relocations. |
| 577 | unsigned int nsyms = input_file.get_global_symbol_count(); |
| 578 | Incremental_binary::View symtab_view(NULL); |
| 579 | unsigned int symtab_count; |
| 580 | elfcpp::Elf_strtab strtab(NULL, 0); |
| 581 | this->get_symtab_view(&symtab_view, &symtab_count, &strtab); |
| 582 | for (unsigned int i = 0; i < nsyms; ++i) |
| 583 | { |
| 584 | bool is_def; |
| 585 | bool is_copy; |
| 586 | unsigned int output_symndx = |
| 587 | input_file.get_output_symbol_index(i, &is_def, &is_copy); |
| 588 | if (is_copy) |
| 589 | { |
| 590 | const unsigned char* sym_p = (symtab_view.data() |
| 591 | + output_symndx * sym_size); |
| 592 | elfcpp::Sym<size, big_endian> gsym(sym_p); |
| 593 | unsigned int shndx = gsym.get_st_shndx(); |
| 594 | if (shndx < 1 || shndx >= this->section_map_.size()) |
| 595 | continue; |
| 596 | Output_section* os = this->section_map_[shndx]; |
| 597 | off_t offset = gsym.get_st_value() - os->address(); |
| 598 | os->reserve(offset, gsym.get_st_size()); |
| 599 | gold_debug(DEBUG_INCREMENTAL, |
| 600 | "Reserve for COPY reloc: %s, off %d, size %d", |
| 601 | os->name(), |
| 602 | static_cast<int>(offset), |
| 603 | static_cast<int>(gsym.get_st_size())); |
| 604 | } |
| 605 | } |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | unsigned int shnum = input_file.get_input_section_count(); |
| 610 | for (unsigned int i = 0; i < shnum; i++) |
| 611 | { |
| 612 | typename Input_entry_reader::Input_section_info sect = |
| 613 | input_file.get_input_section(i); |
| 614 | if (sect.output_shndx == 0 || sect.sh_offset == -1) |
| 615 | continue; |
| 616 | Output_section* os = this->section_map_[sect.output_shndx]; |
| 617 | gold_assert(os != NULL); |
| 618 | os->reserve(sect.sh_offset, sect.sh_size); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | // Process the GOT and PLT entries from the existing output file. |
| 623 | |
| 624 | template<int size, bool big_endian> |
| 625 | void |
| 626 | Sized_incremental_binary<size, big_endian>::do_process_got_plt( |
| 627 | Symbol_table* symtab, |
| 628 | Layout* layout) |
| 629 | { |
| 630 | Incremental_got_plt_reader<big_endian> got_plt_reader(this->got_plt_reader()); |
| 631 | Sized_target<size, big_endian>* target = |
| 632 | parameters->sized_target<size, big_endian>(); |
| 633 | |
| 634 | // Get the number of symbols in the main symbol table and in the |
| 635 | // incremental symbol table. The difference between the two counts |
| 636 | // is the index of the first forced-local or global symbol in the |
| 637 | // main symbol table. |
| 638 | unsigned int symtab_count = |
| 639 | this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; |
| 640 | unsigned int isym_count = this->symtab_reader_.symbol_count(); |
| 641 | unsigned int first_global = symtab_count - isym_count; |
| 642 | |
| 643 | // Tell the target how big the GOT and PLT sections are. |
| 644 | unsigned int got_count = got_plt_reader.get_got_entry_count(); |
| 645 | unsigned int plt_count = got_plt_reader.get_plt_entry_count(); |
| 646 | Output_data_got_base* got = |
| 647 | target->init_got_plt_for_update(symtab, layout, got_count, plt_count); |
| 648 | |
| 649 | // Read the GOT entries from the base file and build the outgoing GOT. |
| 650 | for (unsigned int i = 0; i < got_count; ++i) |
| 651 | { |
| 652 | unsigned int got_type = got_plt_reader.get_got_type(i); |
| 653 | if ((got_type & 0x7f) == 0x7f) |
| 654 | { |
| 655 | // This is the second entry of a pair. |
| 656 | got->reserve_slot(i); |
| 657 | continue; |
| 658 | } |
| 659 | unsigned int symndx = got_plt_reader.get_got_symndx(i); |
| 660 | if (got_type & 0x80) |
| 661 | { |
| 662 | // This is an entry for a local symbol. Ignore this entry if |
| 663 | // the object file was replaced. |
| 664 | unsigned int input_index = got_plt_reader.get_got_input_index(i); |
| 665 | gold_debug(DEBUG_INCREMENTAL, |
| 666 | "GOT entry %d, type %02x: (local symbol)", |
| 667 | i, got_type & 0x7f); |
| 668 | Sized_relobj_incr<size, big_endian>* obj = |
| 669 | this->input_object(input_index); |
| 670 | if (obj != NULL) |
| 671 | target->reserve_local_got_entry(i, obj, symndx, got_type & 0x7f); |
| 672 | } |
| 673 | else |
| 674 | { |
| 675 | // This is an entry for a global symbol. GOT_DESC is the symbol |
| 676 | // table index. |
| 677 | // FIXME: This should really be a fatal error (corrupt input). |
| 678 | gold_assert(symndx >= first_global && symndx < symtab_count); |
| 679 | Symbol* sym = this->global_symbol(symndx - first_global); |
| 680 | // Add the GOT entry only if the symbol is still referenced. |
| 681 | if (sym != NULL && sym->in_reg()) |
| 682 | { |
| 683 | gold_debug(DEBUG_INCREMENTAL, |
| 684 | "GOT entry %d, type %02x: %s", |
| 685 | i, got_type, sym->name()); |
| 686 | target->reserve_global_got_entry(i, sym, got_type); |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | |
| 691 | // Read the PLT entries from the base file and pass each to the target. |
| 692 | for (unsigned int i = 0; i < plt_count; ++i) |
| 693 | { |
| 694 | unsigned int plt_desc = got_plt_reader.get_plt_desc(i); |
| 695 | // FIXME: This should really be a fatal error (corrupt input). |
| 696 | gold_assert(plt_desc >= first_global && plt_desc < symtab_count); |
| 697 | Symbol* sym = this->global_symbol(plt_desc - first_global); |
| 698 | // Add the PLT entry only if the symbol is still referenced. |
| 699 | if (sym != NULL && sym->in_reg()) |
| 700 | { |
| 701 | gold_debug(DEBUG_INCREMENTAL, |
| 702 | "PLT entry %d: %s", |
| 703 | i, sym->name()); |
| 704 | target->register_global_plt_entry(symtab, layout, i, sym); |
| 705 | } |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | // Emit COPY relocations from the existing output file. |
| 710 | |
| 711 | template<int size, bool big_endian> |
| 712 | void |
| 713 | Sized_incremental_binary<size, big_endian>::do_emit_copy_relocs( |
| 714 | Symbol_table* symtab) |
| 715 | { |
| 716 | Sized_target<size, big_endian>* target = |
| 717 | parameters->sized_target<size, big_endian>(); |
| 718 | |
| 719 | for (typename Copy_relocs::iterator p = this->copy_relocs_.begin(); |
| 720 | p != this->copy_relocs_.end(); |
| 721 | ++p) |
| 722 | { |
| 723 | if (!(*p).symbol->is_copied_from_dynobj()) |
| 724 | target->emit_copy_reloc(symtab, (*p).symbol, (*p).output_section, |
| 725 | (*p).offset); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | // Apply incremental relocations for symbols whose values have changed. |
| 730 | |
| 731 | template<int size, bool big_endian> |
| 732 | void |
| 733 | Sized_incremental_binary<size, big_endian>::do_apply_incremental_relocs( |
| 734 | const Symbol_table* symtab, |
| 735 | Layout* layout, |
| 736 | Output_file* of) |
| 737 | { |
| 738 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 739 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; |
| 740 | Incremental_symtab_reader<big_endian> isymtab(this->symtab_reader()); |
| 741 | Incremental_relocs_reader<size, big_endian> irelocs(this->relocs_reader()); |
| 742 | unsigned int nglobals = isymtab.symbol_count(); |
| 743 | const unsigned int incr_reloc_size = irelocs.reloc_size; |
| 744 | |
| 745 | Relocate_info<size, big_endian> relinfo; |
| 746 | relinfo.symtab = symtab; |
| 747 | relinfo.layout = layout; |
| 748 | relinfo.object = NULL; |
| 749 | relinfo.reloc_shndx = 0; |
| 750 | relinfo.reloc_shdr = NULL; |
| 751 | relinfo.data_shndx = 0; |
| 752 | relinfo.data_shdr = NULL; |
| 753 | |
| 754 | Sized_target<size, big_endian>* target = |
| 755 | parameters->sized_target<size, big_endian>(); |
| 756 | |
| 757 | for (unsigned int i = 0; i < nglobals; i++) |
| 758 | { |
| 759 | const Symbol* gsym = this->global_symbol(i); |
| 760 | |
| 761 | // If the symbol is not referenced from any unchanged input files, |
| 762 | // we do not need to reapply any of its relocations. |
| 763 | if (gsym == NULL) |
| 764 | continue; |
| 765 | |
| 766 | // If the symbol is defined in an unchanged file, we do not need to |
| 767 | // reapply any of its relocations. |
| 768 | if (gsym->source() == Symbol::FROM_OBJECT |
| 769 | && gsym->object()->is_incremental()) |
| 770 | continue; |
| 771 | |
| 772 | gold_debug(DEBUG_INCREMENTAL, |
| 773 | "Applying incremental relocations for global symbol %s [%d]", |
| 774 | gsym->name(), i); |
| 775 | |
| 776 | // Follow the linked list of input symbol table entries for this symbol. |
| 777 | // We don't bother to figure out whether the symbol table entry belongs |
| 778 | // to a changed or unchanged file because it's easier just to apply all |
| 779 | // the relocations -- although we might scribble over an area that has |
| 780 | // been reallocated, we do this before copying any new data into the |
| 781 | // output file. |
| 782 | unsigned int offset = isymtab.get_list_head(i); |
| 783 | while (offset > 0) |
| 784 | { |
| 785 | Incremental_global_symbol_reader<big_endian> sym_info = |
| 786 | this->inputs_reader().global_symbol_reader_at_offset(offset); |
| 787 | unsigned int r_base = sym_info.reloc_offset(); |
| 788 | unsigned int r_count = sym_info.reloc_count(); |
| 789 | |
| 790 | // Apply each relocation for this symbol table entry. |
| 791 | for (unsigned int j = 0; j < r_count; |
| 792 | ++j, r_base += incr_reloc_size) |
| 793 | { |
| 794 | unsigned int r_type = irelocs.get_r_type(r_base); |
| 795 | unsigned int r_shndx = irelocs.get_r_shndx(r_base); |
| 796 | Address r_offset = irelocs.get_r_offset(r_base); |
| 797 | Addend r_addend = irelocs.get_r_addend(r_base); |
| 798 | Output_section* os = this->output_section(r_shndx); |
| 799 | Address address = os->address(); |
| 800 | off_t section_offset = os->offset(); |
| 801 | size_t view_size = os->data_size(); |
| 802 | unsigned char* const view = of->get_output_view(section_offset, |
| 803 | view_size); |
| 804 | |
| 805 | gold_debug(DEBUG_INCREMENTAL, |
| 806 | " %08lx: %s + %d: type %d addend %ld", |
| 807 | (long)(section_offset + r_offset), |
| 808 | os->name(), |
| 809 | (int)r_offset, |
| 810 | r_type, |
| 811 | (long)r_addend); |
| 812 | |
| 813 | target->apply_relocation(&relinfo, r_offset, r_type, r_addend, |
| 814 | gsym, view, address, view_size); |
| 815 | |
| 816 | // FIXME: Do something more efficient if write_output_view |
| 817 | // ever becomes more than a no-op. |
| 818 | of->write_output_view(section_offset, view_size, view); |
| 819 | } |
| 820 | offset = sym_info.next_offset(); |
| 821 | } |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | // Get a view of the main symbol table and the symbol string table. |
| 826 | |
| 827 | template<int size, bool big_endian> |
| 828 | void |
| 829 | Sized_incremental_binary<size, big_endian>::get_symtab_view( |
| 830 | View* symtab_view, |
| 831 | unsigned int* nsyms, |
| 832 | elfcpp::Elf_strtab* strtab) |
| 833 | { |
| 834 | *symtab_view = this->view(this->main_symtab_loc_); |
| 835 | *nsyms = this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; |
| 836 | |
| 837 | View strtab_view(this->view(this->main_strtab_loc_)); |
| 838 | *strtab = elfcpp::Elf_strtab(strtab_view.data(), |
| 839 | this->main_strtab_loc_.data_size); |
| 840 | } |
| 841 | |
| 842 | namespace |
| 843 | { |
| 844 | |
| 845 | // Create a Sized_incremental_binary object of the specified size and |
| 846 | // endianness. Fails if the target architecture is not supported. |
| 847 | |
| 848 | template<int size, bool big_endian> |
| 849 | Incremental_binary* |
| 850 | make_sized_incremental_binary(Output_file* file, |
| 851 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
| 852 | { |
| 853 | Target* target = select_target(NULL, 0, // XXX |
| 854 | ehdr.get_e_machine(), size, big_endian, |
| 855 | ehdr.get_e_ident()[elfcpp::EI_OSABI], |
| 856 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); |
| 857 | if (target == NULL) |
| 858 | { |
| 859 | explain_no_incremental(_("unsupported ELF machine number %d"), |
| 860 | ehdr.get_e_machine()); |
| 861 | return NULL; |
| 862 | } |
| 863 | |
| 864 | if (!parameters->target_valid()) |
| 865 | set_parameters_target(target); |
| 866 | else if (target != ¶meters->target()) |
| 867 | gold_error(_("%s: incompatible target"), file->filename()); |
| 868 | |
| 869 | return new Sized_incremental_binary<size, big_endian>(file, ehdr, target); |
| 870 | } |
| 871 | |
| 872 | } // End of anonymous namespace. |
| 873 | |
| 874 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
| 875 | // possible, e.g. FILE is not an ELF file or has an unsupported target. FILE |
| 876 | // should be opened. |
| 877 | |
| 878 | Incremental_binary* |
| 879 | open_incremental_binary(Output_file* file) |
| 880 | { |
| 881 | off_t filesize = file->filesize(); |
| 882 | int want = elfcpp::Elf_recognizer::max_header_size; |
| 883 | if (filesize < want) |
| 884 | want = filesize; |
| 885 | |
| 886 | const unsigned char* p = file->get_input_view(0, want); |
| 887 | if (!elfcpp::Elf_recognizer::is_elf_file(p, want)) |
| 888 | { |
| 889 | explain_no_incremental(_("output is not an ELF file.")); |
| 890 | return NULL; |
| 891 | } |
| 892 | |
| 893 | int size = 0; |
| 894 | bool big_endian = false; |
| 895 | std::string error; |
| 896 | if (!elfcpp::Elf_recognizer::is_valid_header(p, want, &size, &big_endian, |
| 897 | &error)) |
| 898 | { |
| 899 | explain_no_incremental(error.c_str()); |
| 900 | return NULL; |
| 901 | } |
| 902 | |
| 903 | Incremental_binary* result = NULL; |
| 904 | if (size == 32) |
| 905 | { |
| 906 | if (big_endian) |
| 907 | { |
| 908 | #ifdef HAVE_TARGET_32_BIG |
| 909 | result = make_sized_incremental_binary<32, true>( |
| 910 | file, elfcpp::Ehdr<32, true>(p)); |
| 911 | #else |
| 912 | explain_no_incremental(_("unsupported file: 32-bit, big-endian")); |
| 913 | #endif |
| 914 | } |
| 915 | else |
| 916 | { |
| 917 | #ifdef HAVE_TARGET_32_LITTLE |
| 918 | result = make_sized_incremental_binary<32, false>( |
| 919 | file, elfcpp::Ehdr<32, false>(p)); |
| 920 | #else |
| 921 | explain_no_incremental(_("unsupported file: 32-bit, little-endian")); |
| 922 | #endif |
| 923 | } |
| 924 | } |
| 925 | else if (size == 64) |
| 926 | { |
| 927 | if (big_endian) |
| 928 | { |
| 929 | #ifdef HAVE_TARGET_64_BIG |
| 930 | result = make_sized_incremental_binary<64, true>( |
| 931 | file, elfcpp::Ehdr<64, true>(p)); |
| 932 | #else |
| 933 | explain_no_incremental(_("unsupported file: 64-bit, big-endian")); |
| 934 | #endif |
| 935 | } |
| 936 | else |
| 937 | { |
| 938 | #ifdef HAVE_TARGET_64_LITTLE |
| 939 | result = make_sized_incremental_binary<64, false>( |
| 940 | file, elfcpp::Ehdr<64, false>(p)); |
| 941 | #else |
| 942 | explain_no_incremental(_("unsupported file: 64-bit, little-endian")); |
| 943 | #endif |
| 944 | } |
| 945 | } |
| 946 | else |
| 947 | gold_unreachable(); |
| 948 | |
| 949 | return result; |
| 950 | } |
| 951 | |
| 952 | // Class Incremental_inputs. |
| 953 | |
| 954 | // Add the command line to the string table, setting |
| 955 | // command_line_key_. In incremental builds, the command line is |
| 956 | // stored in .gnu_incremental_inputs so that the next linker run can |
| 957 | // check if the command line options didn't change. |
| 958 | |
| 959 | void |
| 960 | Incremental_inputs::report_command_line(int argc, const char* const* argv) |
| 961 | { |
| 962 | // Always store 'gold' as argv[0] to avoid a full relink if the user used a |
| 963 | // different path to the linker. |
| 964 | std::string args("gold"); |
| 965 | // Copied from collect_argv in main.cc. |
| 966 | for (int i = 1; i < argc; ++i) |
| 967 | { |
| 968 | // Adding/removing these options should not result in a full relink. |
| 969 | if (strcmp(argv[i], "--incremental") == 0 |
| 970 | || strcmp(argv[i], "--incremental-full") == 0 |
| 971 | || strcmp(argv[i], "--incremental-update") == 0 |
| 972 | || strcmp(argv[i], "--incremental-changed") == 0 |
| 973 | || strcmp(argv[i], "--incremental-unchanged") == 0 |
| 974 | || strcmp(argv[i], "--incremental-unknown") == 0 |
| 975 | || strcmp(argv[i], "--incremental-startup-unchanged") == 0 |
| 976 | || is_prefix_of("--incremental-base=", argv[i]) |
| 977 | || is_prefix_of("--incremental-patch=", argv[i]) |
| 978 | || is_prefix_of("--debug=", argv[i])) |
| 979 | continue; |
| 980 | if (strcmp(argv[i], "--incremental-base") == 0 |
| 981 | || strcmp(argv[i], "--incremental-patch") == 0 |
| 982 | || strcmp(argv[i], "--debug") == 0) |
| 983 | { |
| 984 | // When these options are used without the '=', skip the |
| 985 | // following parameter as well. |
| 986 | ++i; |
| 987 | continue; |
| 988 | } |
| 989 | |
| 990 | args.append(" '"); |
| 991 | // Now append argv[i], but with all single-quotes escaped |
| 992 | const char* argpos = argv[i]; |
| 993 | while (1) |
| 994 | { |
| 995 | const int len = strcspn(argpos, "'"); |
| 996 | args.append(argpos, len); |
| 997 | if (argpos[len] == '\0') |
| 998 | break; |
| 999 | args.append("'\"'\"'"); |
| 1000 | argpos += len + 1; |
| 1001 | } |
| 1002 | args.append("'"); |
| 1003 | } |
| 1004 | |
| 1005 | this->command_line_ = args; |
| 1006 | this->strtab_->add(this->command_line_.c_str(), false, |
| 1007 | &this->command_line_key_); |
| 1008 | } |
| 1009 | |
| 1010 | // Record the input archive file ARCHIVE. This is called by the |
| 1011 | // Add_archive_symbols task before determining which archive members |
| 1012 | // to include. We create the Incremental_archive_entry here and |
| 1013 | // attach it to the Archive, but we do not add it to the list of |
| 1014 | // input objects until report_archive_end is called. |
| 1015 | |
| 1016 | void |
| 1017 | Incremental_inputs::report_archive_begin(Library_base* arch, |
| 1018 | unsigned int arg_serial, |
| 1019 | Script_info* script_info) |
| 1020 | { |
| 1021 | Stringpool::Key filename_key; |
| 1022 | Timespec mtime = arch->get_mtime(); |
| 1023 | |
| 1024 | // For a file loaded from a script, don't record its argument serial number. |
| 1025 | if (script_info != NULL) |
| 1026 | arg_serial = 0; |
| 1027 | |
| 1028 | this->strtab_->add(arch->filename().c_str(), false, &filename_key); |
| 1029 | Incremental_archive_entry* entry = |
| 1030 | new Incremental_archive_entry(filename_key, arg_serial, mtime); |
| 1031 | arch->set_incremental_info(entry); |
| 1032 | |
| 1033 | if (script_info != NULL) |
| 1034 | { |
| 1035 | Incremental_script_entry* script_entry = script_info->incremental_info(); |
| 1036 | gold_assert(script_entry != NULL); |
| 1037 | script_entry->add_object(entry); |
| 1038 | } |
| 1039 | } |
| 1040 | |
| 1041 | // Visitor class for processing the unused global symbols in a library. |
| 1042 | // An instance of this class is passed to the library's |
| 1043 | // for_all_unused_symbols() iterator, which will call the visit() |
| 1044 | // function for each global symbol defined in each unused library |
| 1045 | // member. We add those symbol names to the incremental info for the |
| 1046 | // library. |
| 1047 | |
| 1048 | class Unused_symbol_visitor : public Library_base::Symbol_visitor_base |
| 1049 | { |
| 1050 | public: |
| 1051 | Unused_symbol_visitor(Incremental_archive_entry* entry, Stringpool* strtab) |
| 1052 | : entry_(entry), strtab_(strtab) |
| 1053 | { } |
| 1054 | |
| 1055 | void |
| 1056 | visit(const char* sym) |
| 1057 | { |
| 1058 | Stringpool::Key symbol_key; |
| 1059 | this->strtab_->add(sym, true, &symbol_key); |
| 1060 | this->entry_->add_unused_global_symbol(symbol_key); |
| 1061 | } |
| 1062 | |
| 1063 | private: |
| 1064 | Incremental_archive_entry* entry_; |
| 1065 | Stringpool* strtab_; |
| 1066 | }; |
| 1067 | |
| 1068 | // Finish recording the input archive file ARCHIVE. This is called by the |
| 1069 | // Add_archive_symbols task after determining which archive members |
| 1070 | // to include. |
| 1071 | |
| 1072 | void |
| 1073 | Incremental_inputs::report_archive_end(Library_base* arch) |
| 1074 | { |
| 1075 | Incremental_archive_entry* entry = arch->incremental_info(); |
| 1076 | |
| 1077 | gold_assert(entry != NULL); |
| 1078 | this->inputs_.push_back(entry); |
| 1079 | |
| 1080 | // Collect unused global symbols. |
| 1081 | Unused_symbol_visitor v(entry, this->strtab_); |
| 1082 | arch->for_all_unused_symbols(&v); |
| 1083 | } |
| 1084 | |
| 1085 | // Record the input object file OBJ. If ARCH is not NULL, attach |
| 1086 | // the object file to the archive. This is called by the |
| 1087 | // Add_symbols task after finding out the type of the file. |
| 1088 | |
| 1089 | void |
| 1090 | Incremental_inputs::report_object(Object* obj, unsigned int arg_serial, |
| 1091 | Library_base* arch, Script_info* script_info) |
| 1092 | { |
| 1093 | Stringpool::Key filename_key; |
| 1094 | Timespec mtime = obj->get_mtime(); |
| 1095 | |
| 1096 | // For a file loaded from a script, don't record its argument serial number. |
| 1097 | if (script_info != NULL) |
| 1098 | arg_serial = 0; |
| 1099 | |
| 1100 | this->strtab_->add(obj->name().c_str(), false, &filename_key); |
| 1101 | |
| 1102 | Incremental_input_entry* input_entry; |
| 1103 | |
| 1104 | this->current_object_ = obj; |
| 1105 | |
| 1106 | if (!obj->is_dynamic()) |
| 1107 | { |
| 1108 | this->current_object_entry_ = |
| 1109 | new Incremental_object_entry(filename_key, obj, arg_serial, mtime); |
| 1110 | input_entry = this->current_object_entry_; |
| 1111 | if (arch != NULL) |
| 1112 | { |
| 1113 | Incremental_archive_entry* arch_entry = arch->incremental_info(); |
| 1114 | gold_assert(arch_entry != NULL); |
| 1115 | arch_entry->add_object(this->current_object_entry_); |
| 1116 | } |
| 1117 | } |
| 1118 | else |
| 1119 | { |
| 1120 | this->current_object_entry_ = NULL; |
| 1121 | Stringpool::Key soname_key; |
| 1122 | Dynobj* dynobj = obj->dynobj(); |
| 1123 | gold_assert(dynobj != NULL); |
| 1124 | this->strtab_->add(dynobj->soname(), false, &soname_key); |
| 1125 | input_entry = new Incremental_dynobj_entry(filename_key, soname_key, obj, |
| 1126 | arg_serial, mtime); |
| 1127 | } |
| 1128 | |
| 1129 | if (obj->is_in_system_directory()) |
| 1130 | input_entry->set_is_in_system_directory(); |
| 1131 | |
| 1132 | if (obj->as_needed()) |
| 1133 | input_entry->set_as_needed(); |
| 1134 | |
| 1135 | this->inputs_.push_back(input_entry); |
| 1136 | |
| 1137 | if (script_info != NULL) |
| 1138 | { |
| 1139 | Incremental_script_entry* script_entry = script_info->incremental_info(); |
| 1140 | gold_assert(script_entry != NULL); |
| 1141 | script_entry->add_object(input_entry); |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | // Record an input section SHNDX from object file OBJ. |
| 1146 | |
| 1147 | void |
| 1148 | Incremental_inputs::report_input_section(Object* obj, unsigned int shndx, |
| 1149 | const char* name, off_t sh_size) |
| 1150 | { |
| 1151 | Stringpool::Key key = 0; |
| 1152 | |
| 1153 | if (name != NULL) |
| 1154 | this->strtab_->add(name, true, &key); |
| 1155 | |
| 1156 | gold_assert(obj == this->current_object_); |
| 1157 | gold_assert(this->current_object_entry_ != NULL); |
| 1158 | this->current_object_entry_->add_input_section(shndx, key, sh_size); |
| 1159 | } |
| 1160 | |
| 1161 | // Record a kept COMDAT group belonging to object file OBJ. |
| 1162 | |
| 1163 | void |
| 1164 | Incremental_inputs::report_comdat_group(Object* obj, const char* name) |
| 1165 | { |
| 1166 | Stringpool::Key key = 0; |
| 1167 | |
| 1168 | if (name != NULL) |
| 1169 | this->strtab_->add(name, true, &key); |
| 1170 | gold_assert(obj == this->current_object_); |
| 1171 | gold_assert(this->current_object_entry_ != NULL); |
| 1172 | this->current_object_entry_->add_comdat_group(key); |
| 1173 | } |
| 1174 | |
| 1175 | // Record that the input argument INPUT is a script SCRIPT. This is |
| 1176 | // called by read_script after parsing the script and reading the list |
| 1177 | // of inputs added by this script. |
| 1178 | |
| 1179 | void |
| 1180 | Incremental_inputs::report_script(Script_info* script, |
| 1181 | unsigned int arg_serial, |
| 1182 | Timespec mtime) |
| 1183 | { |
| 1184 | Stringpool::Key filename_key; |
| 1185 | |
| 1186 | this->strtab_->add(script->filename().c_str(), false, &filename_key); |
| 1187 | Incremental_script_entry* entry = |
| 1188 | new Incremental_script_entry(filename_key, arg_serial, script, mtime); |
| 1189 | this->inputs_.push_back(entry); |
| 1190 | script->set_incremental_info(entry); |
| 1191 | } |
| 1192 | |
| 1193 | // Finalize the incremental link information. Called from |
| 1194 | // Layout::finalize. |
| 1195 | |
| 1196 | void |
| 1197 | Incremental_inputs::finalize() |
| 1198 | { |
| 1199 | // Finalize the string table. |
| 1200 | this->strtab_->set_string_offsets(); |
| 1201 | } |
| 1202 | |
| 1203 | // Create the .gnu_incremental_inputs, _symtab, and _relocs input sections. |
| 1204 | |
| 1205 | void |
| 1206 | Incremental_inputs::create_data_sections(Symbol_table* symtab) |
| 1207 | { |
| 1208 | int reloc_align = 4; |
| 1209 | |
| 1210 | switch (parameters->size_and_endianness()) |
| 1211 | { |
| 1212 | #ifdef HAVE_TARGET_32_LITTLE |
| 1213 | case Parameters::TARGET_32_LITTLE: |
| 1214 | this->inputs_section_ = |
| 1215 | new Output_section_incremental_inputs<32, false>(this, symtab); |
| 1216 | reloc_align = 4; |
| 1217 | break; |
| 1218 | #endif |
| 1219 | #ifdef HAVE_TARGET_32_BIG |
| 1220 | case Parameters::TARGET_32_BIG: |
| 1221 | this->inputs_section_ = |
| 1222 | new Output_section_incremental_inputs<32, true>(this, symtab); |
| 1223 | reloc_align = 4; |
| 1224 | break; |
| 1225 | #endif |
| 1226 | #ifdef HAVE_TARGET_64_LITTLE |
| 1227 | case Parameters::TARGET_64_LITTLE: |
| 1228 | this->inputs_section_ = |
| 1229 | new Output_section_incremental_inputs<64, false>(this, symtab); |
| 1230 | reloc_align = 8; |
| 1231 | break; |
| 1232 | #endif |
| 1233 | #ifdef HAVE_TARGET_64_BIG |
| 1234 | case Parameters::TARGET_64_BIG: |
| 1235 | this->inputs_section_ = |
| 1236 | new Output_section_incremental_inputs<64, true>(this, symtab); |
| 1237 | reloc_align = 8; |
| 1238 | break; |
| 1239 | #endif |
| 1240 | default: |
| 1241 | gold_unreachable(); |
| 1242 | } |
| 1243 | this->symtab_section_ = new Output_data_space(4, "** incremental_symtab"); |
| 1244 | this->relocs_section_ = new Output_data_space(reloc_align, |
| 1245 | "** incremental_relocs"); |
| 1246 | this->got_plt_section_ = new Output_data_space(4, "** incremental_got_plt"); |
| 1247 | } |
| 1248 | |
| 1249 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
| 1250 | unsigned int |
| 1251 | Incremental_inputs::relocs_entsize() const |
| 1252 | { |
| 1253 | return 8 + 2 * parameters->target().get_size() / 8; |
| 1254 | } |
| 1255 | |
| 1256 | // Class Output_section_incremental_inputs. |
| 1257 | |
| 1258 | // Finalize the offsets for each input section and supplemental info block, |
| 1259 | // and set the final data size of the incremental output sections. |
| 1260 | |
| 1261 | template<int size, bool big_endian> |
| 1262 | void |
| 1263 | Output_section_incremental_inputs<size, big_endian>::set_final_data_size() |
| 1264 | { |
| 1265 | const Incremental_inputs* inputs = this->inputs_; |
| 1266 | |
| 1267 | // Offset of each input entry. |
| 1268 | unsigned int input_offset = this->header_size; |
| 1269 | |
| 1270 | // Offset of each supplemental info block. |
| 1271 | unsigned int file_index = 0; |
| 1272 | unsigned int info_offset = this->header_size; |
| 1273 | info_offset += this->input_entry_size * inputs->input_file_count(); |
| 1274 | |
| 1275 | // Count each input file and its supplemental information block. |
| 1276 | for (Incremental_inputs::Input_list::const_iterator p = |
| 1277 | inputs->input_files().begin(); |
| 1278 | p != inputs->input_files().end(); |
| 1279 | ++p) |
| 1280 | { |
| 1281 | // Set the index and offset of the input file entry. |
| 1282 | (*p)->set_offset(file_index, input_offset); |
| 1283 | ++file_index; |
| 1284 | input_offset += this->input_entry_size; |
| 1285 | |
| 1286 | // Set the offset of the supplemental info block. |
| 1287 | switch ((*p)->type()) |
| 1288 | { |
| 1289 | case INCREMENTAL_INPUT_SCRIPT: |
| 1290 | { |
| 1291 | Incremental_script_entry *entry = (*p)->script_entry(); |
| 1292 | gold_assert(entry != NULL); |
| 1293 | (*p)->set_info_offset(info_offset); |
| 1294 | // Object count. |
| 1295 | info_offset += 4; |
| 1296 | // Each member. |
| 1297 | info_offset += (entry->get_object_count() * 4); |
| 1298 | } |
| 1299 | break; |
| 1300 | case INCREMENTAL_INPUT_OBJECT: |
| 1301 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: |
| 1302 | { |
| 1303 | Incremental_object_entry* entry = (*p)->object_entry(); |
| 1304 | gold_assert(entry != NULL); |
| 1305 | (*p)->set_info_offset(info_offset); |
| 1306 | // Input section count, global symbol count, local symbol offset, |
| 1307 | // local symbol count, first dynamic reloc, dynamic reloc count, |
| 1308 | // comdat group count. |
| 1309 | info_offset += this->object_info_size; |
| 1310 | // Each input section. |
| 1311 | info_offset += (entry->get_input_section_count() |
| 1312 | * this->input_section_entry_size); |
| 1313 | // Each global symbol. |
| 1314 | const Object::Symbols* syms = entry->object()->get_global_symbols(); |
| 1315 | info_offset += syms->size() * this->global_sym_entry_size; |
| 1316 | // Each comdat group. |
| 1317 | info_offset += entry->get_comdat_group_count() * 4; |
| 1318 | } |
| 1319 | break; |
| 1320 | case INCREMENTAL_INPUT_SHARED_LIBRARY: |
| 1321 | { |
| 1322 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
| 1323 | gold_assert(entry != NULL); |
| 1324 | (*p)->set_info_offset(info_offset); |
| 1325 | // Global symbol count, soname index. |
| 1326 | info_offset += 8; |
| 1327 | // Each global symbol. |
| 1328 | const Object::Symbols* syms = entry->object()->get_global_symbols(); |
| 1329 | gold_assert(syms != NULL); |
| 1330 | unsigned int nsyms = syms->size(); |
| 1331 | unsigned int nsyms_out = 0; |
| 1332 | for (unsigned int i = 0; i < nsyms; ++i) |
| 1333 | { |
| 1334 | const Symbol* sym = (*syms)[i]; |
| 1335 | if (sym == NULL) |
| 1336 | continue; |
| 1337 | if (sym->is_forwarder()) |
| 1338 | sym = this->symtab_->resolve_forwards(sym); |
| 1339 | if (sym->symtab_index() != -1U) |
| 1340 | ++nsyms_out; |
| 1341 | } |
| 1342 | info_offset += nsyms_out * 4; |
| 1343 | } |
| 1344 | break; |
| 1345 | case INCREMENTAL_INPUT_ARCHIVE: |
| 1346 | { |
| 1347 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
| 1348 | gold_assert(entry != NULL); |
| 1349 | (*p)->set_info_offset(info_offset); |
| 1350 | // Member count + unused global symbol count. |
| 1351 | info_offset += 8; |
| 1352 | // Each member. |
| 1353 | info_offset += (entry->get_member_count() * 4); |
| 1354 | // Each global symbol. |
| 1355 | info_offset += (entry->get_unused_global_symbol_count() * 4); |
| 1356 | } |
| 1357 | break; |
| 1358 | default: |
| 1359 | gold_unreachable(); |
| 1360 | } |
| 1361 | |
| 1362 | // Pad so each supplemental info block begins at an 8-byte boundary. |
| 1363 | if (info_offset & 4) |
| 1364 | info_offset += 4; |
| 1365 | } |
| 1366 | |
| 1367 | this->set_data_size(info_offset); |
| 1368 | |
| 1369 | // Set the size of the .gnu_incremental_symtab section. |
| 1370 | inputs->symtab_section()->set_current_data_size(this->symtab_->output_count() |
| 1371 | * sizeof(unsigned int)); |
| 1372 | |
| 1373 | // Set the size of the .gnu_incremental_relocs section. |
| 1374 | inputs->relocs_section()->set_current_data_size(inputs->get_reloc_count() |
| 1375 | * this->incr_reloc_size); |
| 1376 | |
| 1377 | // Set the size of the .gnu_incremental_got_plt section. |
| 1378 | Sized_target<size, big_endian>* target = |
| 1379 | parameters->sized_target<size, big_endian>(); |
| 1380 | unsigned int got_count = target->got_entry_count(); |
| 1381 | unsigned int plt_count = target->plt_entry_count(); |
| 1382 | unsigned int got_plt_size = 8; // GOT entry count, PLT entry count. |
| 1383 | got_plt_size = (got_plt_size + got_count + 3) & ~3; // GOT type array. |
| 1384 | got_plt_size += got_count * 8 + plt_count * 4; // GOT array, PLT array. |
| 1385 | inputs->got_plt_section()->set_current_data_size(got_plt_size); |
| 1386 | } |
| 1387 | |
| 1388 | // Write the contents of the .gnu_incremental_inputs and |
| 1389 | // .gnu_incremental_symtab sections. |
| 1390 | |
| 1391 | template<int size, bool big_endian> |
| 1392 | void |
| 1393 | Output_section_incremental_inputs<size, big_endian>::do_write(Output_file* of) |
| 1394 | { |
| 1395 | const Incremental_inputs* inputs = this->inputs_; |
| 1396 | Stringpool* strtab = inputs->get_stringpool(); |
| 1397 | |
| 1398 | // Get a view into the .gnu_incremental_inputs section. |
| 1399 | const off_t off = this->offset(); |
| 1400 | const off_t oview_size = this->data_size(); |
| 1401 | unsigned char* const oview = of->get_output_view(off, oview_size); |
| 1402 | unsigned char* pov = oview; |
| 1403 | |
| 1404 | // Get a view into the .gnu_incremental_symtab section. |
| 1405 | const off_t symtab_off = inputs->symtab_section()->offset(); |
| 1406 | const off_t symtab_size = inputs->symtab_section()->data_size(); |
| 1407 | unsigned char* const symtab_view = of->get_output_view(symtab_off, |
| 1408 | symtab_size); |
| 1409 | |
| 1410 | // Allocate an array of linked list heads for the .gnu_incremental_symtab |
| 1411 | // section. Each element corresponds to a global symbol in the output |
| 1412 | // symbol table, and points to the head of the linked list that threads |
| 1413 | // through the object file input entries. The value of each element |
| 1414 | // is the section-relative offset to a global symbol entry in a |
| 1415 | // supplemental information block. |
| 1416 | unsigned int global_sym_count = this->symtab_->output_count(); |
| 1417 | unsigned int* global_syms = new unsigned int[global_sym_count]; |
| 1418 | memset(global_syms, 0, global_sym_count * sizeof(unsigned int)); |
| 1419 | |
| 1420 | // Write the section header. |
| 1421 | Stringpool::Key command_line_key = inputs->command_line_key(); |
| 1422 | pov = this->write_header(pov, inputs->input_file_count(), |
| 1423 | strtab->get_offset_from_key(command_line_key)); |
| 1424 | |
| 1425 | // Write the list of input files. |
| 1426 | pov = this->write_input_files(oview, pov, strtab); |
| 1427 | |
| 1428 | // Write the supplemental information blocks for each input file. |
| 1429 | pov = this->write_info_blocks(oview, pov, strtab, global_syms, |
| 1430 | global_sym_count); |
| 1431 | |
| 1432 | gold_assert(pov - oview == oview_size); |
| 1433 | |
| 1434 | // Write the .gnu_incremental_symtab section. |
| 1435 | gold_assert(static_cast<off_t>(global_sym_count) * 4 == symtab_size); |
| 1436 | this->write_symtab(symtab_view, global_syms, global_sym_count); |
| 1437 | |
| 1438 | delete[] global_syms; |
| 1439 | |
| 1440 | // Write the .gnu_incremental_got_plt section. |
| 1441 | const off_t got_plt_off = inputs->got_plt_section()->offset(); |
| 1442 | const off_t got_plt_size = inputs->got_plt_section()->data_size(); |
| 1443 | unsigned char* const got_plt_view = of->get_output_view(got_plt_off, |
| 1444 | got_plt_size); |
| 1445 | this->write_got_plt(got_plt_view, got_plt_size); |
| 1446 | |
| 1447 | of->write_output_view(off, oview_size, oview); |
| 1448 | of->write_output_view(symtab_off, symtab_size, symtab_view); |
| 1449 | of->write_output_view(got_plt_off, got_plt_size, got_plt_view); |
| 1450 | } |
| 1451 | |
| 1452 | // Write the section header: version, input file count, offset of command line |
| 1453 | // in the string table, and 4 bytes of padding. |
| 1454 | |
| 1455 | template<int size, bool big_endian> |
| 1456 | unsigned char* |
| 1457 | Output_section_incremental_inputs<size, big_endian>::write_header( |
| 1458 | unsigned char* pov, |
| 1459 | unsigned int input_file_count, |
| 1460 | section_offset_type command_line_offset) |
| 1461 | { |
| 1462 | Swap32::writeval(pov, INCREMENTAL_LINK_VERSION); |
| 1463 | Swap32::writeval(pov + 4, input_file_count); |
| 1464 | Swap32::writeval(pov + 8, command_line_offset); |
| 1465 | Swap32::writeval(pov + 12, 0); |
| 1466 | gold_assert(this->header_size == 16); |
| 1467 | return pov + this->header_size; |
| 1468 | } |
| 1469 | |
| 1470 | // Write the input file entries. |
| 1471 | |
| 1472 | template<int size, bool big_endian> |
| 1473 | unsigned char* |
| 1474 | Output_section_incremental_inputs<size, big_endian>::write_input_files( |
| 1475 | unsigned char* oview, |
| 1476 | unsigned char* pov, |
| 1477 | Stringpool* strtab) |
| 1478 | { |
| 1479 | const Incremental_inputs* inputs = this->inputs_; |
| 1480 | |
| 1481 | for (Incremental_inputs::Input_list::const_iterator p = |
| 1482 | inputs->input_files().begin(); |
| 1483 | p != inputs->input_files().end(); |
| 1484 | ++p) |
| 1485 | { |
| 1486 | gold_assert(static_cast<unsigned int>(pov - oview) == (*p)->get_offset()); |
| 1487 | section_offset_type filename_offset = |
| 1488 | strtab->get_offset_from_key((*p)->get_filename_key()); |
| 1489 | const Timespec& mtime = (*p)->get_mtime(); |
| 1490 | unsigned int flags = (*p)->type(); |
| 1491 | if ((*p)->is_in_system_directory()) |
| 1492 | flags |= INCREMENTAL_INPUT_IN_SYSTEM_DIR; |
| 1493 | if ((*p)->as_needed()) |
| 1494 | flags |= INCREMENTAL_INPUT_AS_NEEDED; |
| 1495 | Swap32::writeval(pov, filename_offset); |
| 1496 | Swap32::writeval(pov + 4, (*p)->get_info_offset()); |
| 1497 | Swap64::writeval(pov + 8, mtime.seconds); |
| 1498 | Swap32::writeval(pov + 16, mtime.nanoseconds); |
| 1499 | Swap16::writeval(pov + 20, flags); |
| 1500 | Swap16::writeval(pov + 22, (*p)->arg_serial()); |
| 1501 | gold_assert(this->input_entry_size == 24); |
| 1502 | pov += this->input_entry_size; |
| 1503 | } |
| 1504 | return pov; |
| 1505 | } |
| 1506 | |
| 1507 | // Write the supplemental information blocks. |
| 1508 | |
| 1509 | template<int size, bool big_endian> |
| 1510 | unsigned char* |
| 1511 | Output_section_incremental_inputs<size, big_endian>::write_info_blocks( |
| 1512 | unsigned char* oview, |
| 1513 | unsigned char* pov, |
| 1514 | Stringpool* strtab, |
| 1515 | unsigned int* global_syms, |
| 1516 | unsigned int global_sym_count) |
| 1517 | { |
| 1518 | const Incremental_inputs* inputs = this->inputs_; |
| 1519 | unsigned int first_global_index = this->symtab_->first_global_index(); |
| 1520 | |
| 1521 | for (Incremental_inputs::Input_list::const_iterator p = |
| 1522 | inputs->input_files().begin(); |
| 1523 | p != inputs->input_files().end(); |
| 1524 | ++p) |
| 1525 | { |
| 1526 | switch ((*p)->type()) |
| 1527 | { |
| 1528 | case INCREMENTAL_INPUT_SCRIPT: |
| 1529 | { |
| 1530 | gold_assert(static_cast<unsigned int>(pov - oview) |
| 1531 | == (*p)->get_info_offset()); |
| 1532 | Incremental_script_entry* entry = (*p)->script_entry(); |
| 1533 | gold_assert(entry != NULL); |
| 1534 | |
| 1535 | // Write the object count. |
| 1536 | unsigned int nobjects = entry->get_object_count(); |
| 1537 | Swap32::writeval(pov, nobjects); |
| 1538 | pov += 4; |
| 1539 | |
| 1540 | // For each object, write the offset to its input file entry. |
| 1541 | for (unsigned int i = 0; i < nobjects; ++i) |
| 1542 | { |
| 1543 | Incremental_input_entry* obj = entry->get_object(i); |
| 1544 | Swap32::writeval(pov, obj->get_offset()); |
| 1545 | pov += 4; |
| 1546 | } |
| 1547 | } |
| 1548 | break; |
| 1549 | |
| 1550 | case INCREMENTAL_INPUT_OBJECT: |
| 1551 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: |
| 1552 | { |
| 1553 | gold_assert(static_cast<unsigned int>(pov - oview) |
| 1554 | == (*p)->get_info_offset()); |
| 1555 | Incremental_object_entry* entry = (*p)->object_entry(); |
| 1556 | gold_assert(entry != NULL); |
| 1557 | const Object* obj = entry->object(); |
| 1558 | const Relobj* relobj = static_cast<const Relobj*>(obj); |
| 1559 | const Object::Symbols* syms = obj->get_global_symbols(); |
| 1560 | // Write the input section count and global symbol count. |
| 1561 | unsigned int nsections = entry->get_input_section_count(); |
| 1562 | unsigned int nsyms = syms->size(); |
| 1563 | off_t locals_offset = relobj->local_symbol_offset(); |
| 1564 | unsigned int nlocals = relobj->output_local_symbol_count(); |
| 1565 | unsigned int first_dynrel = relobj->first_dyn_reloc(); |
| 1566 | unsigned int ndynrel = relobj->dyn_reloc_count(); |
| 1567 | unsigned int ncomdat = entry->get_comdat_group_count(); |
| 1568 | Swap32::writeval(pov, nsections); |
| 1569 | Swap32::writeval(pov + 4, nsyms); |
| 1570 | Swap32::writeval(pov + 8, static_cast<unsigned int>(locals_offset)); |
| 1571 | Swap32::writeval(pov + 12, nlocals); |
| 1572 | Swap32::writeval(pov + 16, first_dynrel); |
| 1573 | Swap32::writeval(pov + 20, ndynrel); |
| 1574 | Swap32::writeval(pov + 24, ncomdat); |
| 1575 | Swap32::writeval(pov + 28, 0); |
| 1576 | gold_assert(this->object_info_size == 32); |
| 1577 | pov += this->object_info_size; |
| 1578 | |
| 1579 | // Build a temporary array to map input section indexes |
| 1580 | // from the original object file index to the index in the |
| 1581 | // incremental info table. |
| 1582 | unsigned int* index_map = new unsigned int[obj->shnum()]; |
| 1583 | memset(index_map, 0, obj->shnum() * sizeof(unsigned int)); |
| 1584 | |
| 1585 | // For each input section, write the name, output section index, |
| 1586 | // offset within output section, and input section size. |
| 1587 | for (unsigned int i = 0; i < nsections; i++) |
| 1588 | { |
| 1589 | unsigned int shndx = entry->get_input_section_index(i); |
| 1590 | index_map[shndx] = i + 1; |
| 1591 | Stringpool::Key key = entry->get_input_section_name_key(i); |
| 1592 | off_t name_offset = 0; |
| 1593 | if (key != 0) |
| 1594 | name_offset = strtab->get_offset_from_key(key); |
| 1595 | int out_shndx = 0; |
| 1596 | off_t out_offset = 0; |
| 1597 | off_t sh_size = 0; |
| 1598 | Output_section* os = obj->output_section(shndx); |
| 1599 | if (os != NULL) |
| 1600 | { |
| 1601 | out_shndx = os->out_shndx(); |
| 1602 | out_offset = obj->output_section_offset(shndx); |
| 1603 | sh_size = entry->get_input_section_size(i); |
| 1604 | } |
| 1605 | Swap32::writeval(pov, name_offset); |
| 1606 | Swap32::writeval(pov + 4, out_shndx); |
| 1607 | Swap::writeval(pov + 8, out_offset); |
| 1608 | Swap::writeval(pov + 8 + sizeof_addr, sh_size); |
| 1609 | gold_assert(this->input_section_entry_size |
| 1610 | == 8 + 2 * sizeof_addr); |
| 1611 | pov += this->input_section_entry_size; |
| 1612 | } |
| 1613 | |
| 1614 | // For each global symbol, write its associated relocations, |
| 1615 | // add it to the linked list of globals, then write the |
| 1616 | // supplemental information: global symbol table index, |
| 1617 | // input section index, linked list chain pointer, relocation |
| 1618 | // count, and offset to the relocations. |
| 1619 | for (unsigned int i = 0; i < nsyms; i++) |
| 1620 | { |
| 1621 | const Symbol* sym = (*syms)[i]; |
| 1622 | if (sym->is_forwarder()) |
| 1623 | sym = this->symtab_->resolve_forwards(sym); |
| 1624 | unsigned int shndx = 0; |
| 1625 | if (sym->source() != Symbol::FROM_OBJECT) |
| 1626 | { |
| 1627 | // The symbol was defined by the linker (e.g., common). |
| 1628 | // We mark these symbols with a special SHNDX of -1, |
| 1629 | // but exclude linker-predefined symbols and symbols |
| 1630 | // copied from shared objects. |
| 1631 | if (!sym->is_predefined() |
| 1632 | && !sym->is_copied_from_dynobj()) |
| 1633 | shndx = -1U; |
| 1634 | } |
| 1635 | else if (sym->object() == obj && sym->is_defined()) |
| 1636 | { |
| 1637 | bool is_ordinary; |
| 1638 | unsigned int orig_shndx = sym->shndx(&is_ordinary); |
| 1639 | if (is_ordinary) |
| 1640 | shndx = index_map[orig_shndx]; |
| 1641 | else |
| 1642 | shndx = 1; |
| 1643 | } |
| 1644 | unsigned int symtab_index = sym->symtab_index(); |
| 1645 | unsigned int chain = 0; |
| 1646 | unsigned int first_reloc = 0; |
| 1647 | unsigned int nrelocs = obj->get_incremental_reloc_count(i); |
| 1648 | if (nrelocs > 0) |
| 1649 | { |
| 1650 | gold_assert(symtab_index != -1U |
| 1651 | && (symtab_index - first_global_index |
| 1652 | < global_sym_count)); |
| 1653 | first_reloc = obj->get_incremental_reloc_base(i); |
| 1654 | chain = global_syms[symtab_index - first_global_index]; |
| 1655 | global_syms[symtab_index - first_global_index] = |
| 1656 | pov - oview; |
| 1657 | } |
| 1658 | Swap32::writeval(pov, symtab_index); |
| 1659 | Swap32::writeval(pov + 4, shndx); |
| 1660 | Swap32::writeval(pov + 8, chain); |
| 1661 | Swap32::writeval(pov + 12, nrelocs); |
| 1662 | Swap32::writeval(pov + 16, |
| 1663 | first_reloc * (8 + 2 * sizeof_addr)); |
| 1664 | gold_assert(this->global_sym_entry_size == 20); |
| 1665 | pov += this->global_sym_entry_size; |
| 1666 | } |
| 1667 | |
| 1668 | // For each kept COMDAT group, write the group signature. |
| 1669 | for (unsigned int i = 0; i < ncomdat; i++) |
| 1670 | { |
| 1671 | Stringpool::Key key = entry->get_comdat_signature_key(i); |
| 1672 | off_t name_offset = 0; |
| 1673 | if (key != 0) |
| 1674 | name_offset = strtab->get_offset_from_key(key); |
| 1675 | Swap32::writeval(pov, name_offset); |
| 1676 | pov += 4; |
| 1677 | } |
| 1678 | |
| 1679 | delete[] index_map; |
| 1680 | } |
| 1681 | break; |
| 1682 | |
| 1683 | case INCREMENTAL_INPUT_SHARED_LIBRARY: |
| 1684 | { |
| 1685 | gold_assert(static_cast<unsigned int>(pov - oview) |
| 1686 | == (*p)->get_info_offset()); |
| 1687 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
| 1688 | gold_assert(entry != NULL); |
| 1689 | Object* obj = entry->object(); |
| 1690 | Dynobj* dynobj = obj->dynobj(); |
| 1691 | gold_assert(dynobj != NULL); |
| 1692 | const Object::Symbols* syms = obj->get_global_symbols(); |
| 1693 | |
| 1694 | // Write the soname string table index. |
| 1695 | section_offset_type soname_offset = |
| 1696 | strtab->get_offset_from_key(entry->get_soname_key()); |
| 1697 | Swap32::writeval(pov, soname_offset); |
| 1698 | pov += 4; |
| 1699 | |
| 1700 | // Skip the global symbol count for now. |
| 1701 | unsigned char* orig_pov = pov; |
| 1702 | pov += 4; |
| 1703 | |
| 1704 | // For each global symbol, write the global symbol table index. |
| 1705 | unsigned int nsyms = syms->size(); |
| 1706 | unsigned int nsyms_out = 0; |
| 1707 | for (unsigned int i = 0; i < nsyms; i++) |
| 1708 | { |
| 1709 | const Symbol* sym = (*syms)[i]; |
| 1710 | if (sym == NULL) |
| 1711 | continue; |
| 1712 | if (sym->is_forwarder()) |
| 1713 | sym = this->symtab_->resolve_forwards(sym); |
| 1714 | if (sym->symtab_index() == -1U) |
| 1715 | continue; |
| 1716 | unsigned int flags = 0; |
| 1717 | // If the symbol has hidden or internal visibility, we |
| 1718 | // mark it as defined in the shared object so we don't |
| 1719 | // try to resolve it during an incremental update. |
| 1720 | if (sym->visibility() == elfcpp::STV_HIDDEN |
| 1721 | || sym->visibility() == elfcpp::STV_INTERNAL) |
| 1722 | flags = INCREMENTAL_SHLIB_SYM_DEF; |
| 1723 | else if (sym->source() == Symbol::FROM_OBJECT |
| 1724 | && sym->object() == obj |
| 1725 | && sym->is_defined()) |
| 1726 | flags = INCREMENTAL_SHLIB_SYM_DEF; |
| 1727 | else if (sym->is_copied_from_dynobj() |
| 1728 | && this->symtab_->get_copy_source(sym) == dynobj) |
| 1729 | flags = INCREMENTAL_SHLIB_SYM_COPY; |
| 1730 | flags <<= INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT; |
| 1731 | Swap32::writeval(pov, sym->symtab_index() | flags); |
| 1732 | pov += 4; |
| 1733 | ++nsyms_out; |
| 1734 | } |
| 1735 | |
| 1736 | // Now write the global symbol count. |
| 1737 | Swap32::writeval(orig_pov, nsyms_out); |
| 1738 | } |
| 1739 | break; |
| 1740 | |
| 1741 | case INCREMENTAL_INPUT_ARCHIVE: |
| 1742 | { |
| 1743 | gold_assert(static_cast<unsigned int>(pov - oview) |
| 1744 | == (*p)->get_info_offset()); |
| 1745 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
| 1746 | gold_assert(entry != NULL); |
| 1747 | |
| 1748 | // Write the member count and unused global symbol count. |
| 1749 | unsigned int nmembers = entry->get_member_count(); |
| 1750 | unsigned int nsyms = entry->get_unused_global_symbol_count(); |
| 1751 | Swap32::writeval(pov, nmembers); |
| 1752 | Swap32::writeval(pov + 4, nsyms); |
| 1753 | pov += 8; |
| 1754 | |
| 1755 | // For each member, write the offset to its input file entry. |
| 1756 | for (unsigned int i = 0; i < nmembers; ++i) |
| 1757 | { |
| 1758 | Incremental_object_entry* member = entry->get_member(i); |
| 1759 | Swap32::writeval(pov, member->get_offset()); |
| 1760 | pov += 4; |
| 1761 | } |
| 1762 | |
| 1763 | // For each global symbol, write the name offset. |
| 1764 | for (unsigned int i = 0; i < nsyms; ++i) |
| 1765 | { |
| 1766 | Stringpool::Key key = entry->get_unused_global_symbol(i); |
| 1767 | Swap32::writeval(pov, strtab->get_offset_from_key(key)); |
| 1768 | pov += 4; |
| 1769 | } |
| 1770 | } |
| 1771 | break; |
| 1772 | |
| 1773 | default: |
| 1774 | gold_unreachable(); |
| 1775 | } |
| 1776 | |
| 1777 | // Pad the info block to a multiple of 8 bytes. |
| 1778 | if (static_cast<unsigned int>(pov - oview) & 4) |
| 1779 | { |
| 1780 | Swap32::writeval(pov, 0); |
| 1781 | pov += 4; |
| 1782 | } |
| 1783 | } |
| 1784 | return pov; |
| 1785 | } |
| 1786 | |
| 1787 | // Write the contents of the .gnu_incremental_symtab section. |
| 1788 | |
| 1789 | template<int size, bool big_endian> |
| 1790 | void |
| 1791 | Output_section_incremental_inputs<size, big_endian>::write_symtab( |
| 1792 | unsigned char* pov, |
| 1793 | unsigned int* global_syms, |
| 1794 | unsigned int global_sym_count) |
| 1795 | { |
| 1796 | for (unsigned int i = 0; i < global_sym_count; ++i) |
| 1797 | { |
| 1798 | Swap32::writeval(pov, global_syms[i]); |
| 1799 | pov += 4; |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | // This struct holds the view information needed to write the |
| 1804 | // .gnu_incremental_got_plt section. |
| 1805 | |
| 1806 | struct Got_plt_view_info |
| 1807 | { |
| 1808 | // Start of the GOT type array in the output view. |
| 1809 | unsigned char* got_type_p; |
| 1810 | // Start of the GOT descriptor array in the output view. |
| 1811 | unsigned char* got_desc_p; |
| 1812 | // Start of the PLT descriptor array in the output view. |
| 1813 | unsigned char* plt_desc_p; |
| 1814 | // Number of GOT entries. |
| 1815 | unsigned int got_count; |
| 1816 | // Number of PLT entries. |
| 1817 | unsigned int plt_count; |
| 1818 | // Offset of the first non-reserved PLT entry (this is a target-dependent value). |
| 1819 | unsigned int first_plt_entry_offset; |
| 1820 | // Size of a PLT entry (this is a target-dependent value). |
| 1821 | unsigned int plt_entry_size; |
| 1822 | // Size of a GOT entry (this is a target-dependent value). |
| 1823 | unsigned int got_entry_size; |
| 1824 | // Symbol index to write in the GOT descriptor array. For global symbols, |
| 1825 | // this is the global symbol table index; for local symbols, it is the |
| 1826 | // local symbol table index. |
| 1827 | unsigned int sym_index; |
| 1828 | // Input file index to write in the GOT descriptor array. For global |
| 1829 | // symbols, this is 0; for local symbols, it is the index of the input |
| 1830 | // file entry in the .gnu_incremental_inputs section. |
| 1831 | unsigned int input_index; |
| 1832 | }; |
| 1833 | |
| 1834 | // Functor class for processing a GOT offset list for local symbols. |
| 1835 | // Writes the GOT type and symbol index into the GOT type and descriptor |
| 1836 | // arrays in the output section. |
| 1837 | |
| 1838 | template<int size, bool big_endian> |
| 1839 | class Local_got_offset_visitor : public Got_offset_list::Visitor |
| 1840 | { |
| 1841 | public: |
| 1842 | Local_got_offset_visitor(struct Got_plt_view_info& info) |
| 1843 | : info_(info) |
| 1844 | { } |
| 1845 | |
| 1846 | void |
| 1847 | visit(unsigned int got_type, unsigned int got_offset) |
| 1848 | { |
| 1849 | unsigned int got_index = got_offset / this->info_.got_entry_size; |
| 1850 | gold_assert(got_index < this->info_.got_count); |
| 1851 | // We can only handle GOT entry types in the range 0..0x7e |
| 1852 | // because we use a byte array to store them, and we use the |
| 1853 | // high bit to flag a local symbol. |
| 1854 | gold_assert(got_type < 0x7f); |
| 1855 | this->info_.got_type_p[got_index] = got_type | 0x80; |
| 1856 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
| 1857 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); |
| 1858 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, this->info_.input_index); |
| 1859 | } |
| 1860 | |
| 1861 | private: |
| 1862 | struct Got_plt_view_info& info_; |
| 1863 | }; |
| 1864 | |
| 1865 | // Functor class for processing a GOT offset list. Writes the GOT type |
| 1866 | // and symbol index into the GOT type and descriptor arrays in the output |
| 1867 | // section. |
| 1868 | |
| 1869 | template<int size, bool big_endian> |
| 1870 | class Global_got_offset_visitor : public Got_offset_list::Visitor |
| 1871 | { |
| 1872 | public: |
| 1873 | Global_got_offset_visitor(struct Got_plt_view_info& info) |
| 1874 | : info_(info) |
| 1875 | { } |
| 1876 | |
| 1877 | void |
| 1878 | visit(unsigned int got_type, unsigned int got_offset) |
| 1879 | { |
| 1880 | unsigned int got_index = got_offset / this->info_.got_entry_size; |
| 1881 | gold_assert(got_index < this->info_.got_count); |
| 1882 | // We can only handle GOT entry types in the range 0..0x7e |
| 1883 | // because we use a byte array to store them, and we use the |
| 1884 | // high bit to flag a local symbol. |
| 1885 | gold_assert(got_type < 0x7f); |
| 1886 | this->info_.got_type_p[got_index] = got_type; |
| 1887 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
| 1888 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); |
| 1889 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, 0); |
| 1890 | } |
| 1891 | |
| 1892 | private: |
| 1893 | struct Got_plt_view_info& info_; |
| 1894 | }; |
| 1895 | |
| 1896 | // Functor class for processing the global symbol table. Processes the |
| 1897 | // GOT offset list for the symbol, and writes the symbol table index |
| 1898 | // into the PLT descriptor array in the output section. |
| 1899 | |
| 1900 | template<int size, bool big_endian> |
| 1901 | class Global_symbol_visitor_got_plt |
| 1902 | { |
| 1903 | public: |
| 1904 | Global_symbol_visitor_got_plt(struct Got_plt_view_info& info) |
| 1905 | : info_(info) |
| 1906 | { } |
| 1907 | |
| 1908 | void |
| 1909 | operator()(const Sized_symbol<size>* sym) |
| 1910 | { |
| 1911 | typedef Global_got_offset_visitor<size, big_endian> Got_visitor; |
| 1912 | const Got_offset_list* got_offsets = sym->got_offset_list(); |
| 1913 | if (got_offsets != NULL) |
| 1914 | { |
| 1915 | this->info_.sym_index = sym->symtab_index(); |
| 1916 | this->info_.input_index = 0; |
| 1917 | Got_visitor v(this->info_); |
| 1918 | got_offsets->for_all_got_offsets(&v); |
| 1919 | } |
| 1920 | if (sym->has_plt_offset()) |
| 1921 | { |
| 1922 | unsigned int plt_index = |
| 1923 | ((sym->plt_offset() - this->info_.first_plt_entry_offset) |
| 1924 | / this->info_.plt_entry_size); |
| 1925 | gold_assert(plt_index < this->info_.plt_count); |
| 1926 | unsigned char* pov = this->info_.plt_desc_p + plt_index * 4; |
| 1927 | elfcpp::Swap<32, big_endian>::writeval(pov, sym->symtab_index()); |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | private: |
| 1932 | struct Got_plt_view_info& info_; |
| 1933 | }; |
| 1934 | |
| 1935 | // Write the contents of the .gnu_incremental_got_plt section. |
| 1936 | |
| 1937 | template<int size, bool big_endian> |
| 1938 | void |
| 1939 | Output_section_incremental_inputs<size, big_endian>::write_got_plt( |
| 1940 | unsigned char* pov, |
| 1941 | off_t view_size) |
| 1942 | { |
| 1943 | Sized_target<size, big_endian>* target = |
| 1944 | parameters->sized_target<size, big_endian>(); |
| 1945 | |
| 1946 | // Set up the view information for the functors. |
| 1947 | struct Got_plt_view_info view_info; |
| 1948 | view_info.got_count = target->got_entry_count(); |
| 1949 | view_info.plt_count = target->plt_entry_count(); |
| 1950 | view_info.first_plt_entry_offset = target->first_plt_entry_offset(); |
| 1951 | view_info.plt_entry_size = target->plt_entry_size(); |
| 1952 | view_info.got_entry_size = target->got_entry_size(); |
| 1953 | view_info.got_type_p = pov + 8; |
| 1954 | view_info.got_desc_p = (view_info.got_type_p |
| 1955 | + ((view_info.got_count + 3) & ~3)); |
| 1956 | view_info.plt_desc_p = view_info.got_desc_p + view_info.got_count * 8; |
| 1957 | |
| 1958 | gold_assert(pov + view_size == |
| 1959 | view_info.plt_desc_p + view_info.plt_count * 4); |
| 1960 | |
| 1961 | // Write the section header. |
| 1962 | Swap32::writeval(pov, view_info.got_count); |
| 1963 | Swap32::writeval(pov + 4, view_info.plt_count); |
| 1964 | |
| 1965 | // Initialize the GOT type array to 0xff (reserved). |
| 1966 | memset(view_info.got_type_p, 0xff, view_info.got_count); |
| 1967 | |
| 1968 | // Write the incremental GOT descriptors for local symbols. |
| 1969 | typedef Local_got_offset_visitor<size, big_endian> Got_visitor; |
| 1970 | for (Incremental_inputs::Input_list::const_iterator p = |
| 1971 | this->inputs_->input_files().begin(); |
| 1972 | p != this->inputs_->input_files().end(); |
| 1973 | ++p) |
| 1974 | { |
| 1975 | if ((*p)->type() != INCREMENTAL_INPUT_OBJECT |
| 1976 | && (*p)->type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER) |
| 1977 | continue; |
| 1978 | Incremental_object_entry* entry = (*p)->object_entry(); |
| 1979 | gold_assert(entry != NULL); |
| 1980 | const Object* obj = entry->object(); |
| 1981 | gold_assert(obj != NULL); |
| 1982 | view_info.input_index = (*p)->get_file_index(); |
| 1983 | Got_visitor v(view_info); |
| 1984 | obj->for_all_local_got_entries(&v); |
| 1985 | } |
| 1986 | |
| 1987 | // Write the incremental GOT and PLT descriptors for global symbols. |
| 1988 | typedef Global_symbol_visitor_got_plt<size, big_endian> Symbol_visitor; |
| 1989 | symtab_->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(view_info)); |
| 1990 | } |
| 1991 | |
| 1992 | // Class Sized_relobj_incr. Most of these methods are not used for |
| 1993 | // Incremental objects, but are required to be implemented by the |
| 1994 | // base class Object. |
| 1995 | |
| 1996 | template<int size, bool big_endian> |
| 1997 | Sized_relobj_incr<size, big_endian>::Sized_relobj_incr( |
| 1998 | const std::string& name, |
| 1999 | Sized_incremental_binary<size, big_endian>* ibase, |
| 2000 | unsigned int input_file_index) |
| 2001 | : Sized_relobj<size, big_endian>(name, NULL), ibase_(ibase), |
| 2002 | input_file_index_(input_file_index), |
| 2003 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), |
| 2004 | local_symbol_count_(0), output_local_dynsym_count_(0), |
| 2005 | local_symbol_index_(0), local_symbol_offset_(0), local_dynsym_offset_(0), |
| 2006 | symbols_(), defined_count_(0), incr_reloc_offset_(-1U), |
| 2007 | incr_reloc_count_(0), incr_reloc_output_index_(0), incr_relocs_(NULL), |
| 2008 | local_symbols_() |
| 2009 | { |
| 2010 | if (this->input_reader_.is_in_system_directory()) |
| 2011 | this->set_is_in_system_directory(); |
| 2012 | const unsigned int shnum = this->input_reader_.get_input_section_count() + 1; |
| 2013 | this->set_shnum(shnum); |
| 2014 | ibase->set_input_object(input_file_index, this); |
| 2015 | } |
| 2016 | |
| 2017 | // Read the symbols. |
| 2018 | |
| 2019 | template<int size, bool big_endian> |
| 2020 | void |
| 2021 | Sized_relobj_incr<size, big_endian>::do_read_symbols(Read_symbols_data*) |
| 2022 | { |
| 2023 | gold_unreachable(); |
| 2024 | } |
| 2025 | |
| 2026 | // Lay out the input sections. |
| 2027 | |
| 2028 | template<int size, bool big_endian> |
| 2029 | void |
| 2030 | Sized_relobj_incr<size, big_endian>::do_layout( |
| 2031 | Symbol_table*, |
| 2032 | Layout* layout, |
| 2033 | Read_symbols_data*) |
| 2034 | { |
| 2035 | const unsigned int shnum = this->shnum(); |
| 2036 | Incremental_inputs* incremental_inputs = layout->incremental_inputs(); |
| 2037 | gold_assert(incremental_inputs != NULL); |
| 2038 | Output_sections& out_sections(this->output_sections()); |
| 2039 | out_sections.resize(shnum); |
| 2040 | this->section_offsets().resize(shnum); |
| 2041 | |
| 2042 | // Keep track of .debug_info and .debug_types sections. |
| 2043 | std::vector<unsigned int> debug_info_sections; |
| 2044 | std::vector<unsigned int> debug_types_sections; |
| 2045 | |
| 2046 | for (unsigned int i = 1; i < shnum; i++) |
| 2047 | { |
| 2048 | typename Input_entry_reader::Input_section_info sect = |
| 2049 | this->input_reader_.get_input_section(i - 1); |
| 2050 | // Add the section to the incremental inputs layout. |
| 2051 | incremental_inputs->report_input_section(this, i, sect.name, |
| 2052 | sect.sh_size); |
| 2053 | if (sect.output_shndx == 0 || sect.sh_offset == -1) |
| 2054 | continue; |
| 2055 | Output_section* os = this->ibase_->output_section(sect.output_shndx); |
| 2056 | gold_assert(os != NULL); |
| 2057 | out_sections[i] = os; |
| 2058 | this->section_offsets()[i] = static_cast<Address>(sect.sh_offset); |
| 2059 | |
| 2060 | // When generating a .gdb_index section, we do additional |
| 2061 | // processing of .debug_info and .debug_types sections after all |
| 2062 | // the other sections. |
| 2063 | if (parameters->options().gdb_index()) |
| 2064 | { |
| 2065 | const char* name = os->name(); |
| 2066 | if (strcmp(name, ".debug_info") == 0) |
| 2067 | debug_info_sections.push_back(i); |
| 2068 | else if (strcmp(name, ".debug_types") == 0) |
| 2069 | debug_types_sections.push_back(i); |
| 2070 | } |
| 2071 | } |
| 2072 | |
| 2073 | // Process the COMDAT groups. |
| 2074 | unsigned int ncomdat = this->input_reader_.get_comdat_group_count(); |
| 2075 | for (unsigned int i = 0; i < ncomdat; i++) |
| 2076 | { |
| 2077 | const char* signature = this->input_reader_.get_comdat_group_signature(i); |
| 2078 | if (signature == NULL || signature[0] == '\0') |
| 2079 | this->error(_("COMDAT group has no signature")); |
| 2080 | bool keep = layout->find_or_add_kept_section(signature, this, i, true, |
| 2081 | true, NULL); |
| 2082 | if (keep) |
| 2083 | incremental_inputs->report_comdat_group(this, signature); |
| 2084 | else |
| 2085 | this->error(_("COMDAT group %s included twice in incremental link"), |
| 2086 | signature); |
| 2087 | } |
| 2088 | |
| 2089 | // When building a .gdb_index section, scan the .debug_info and |
| 2090 | // .debug_types sections. |
| 2091 | for (std::vector<unsigned int>::const_iterator p |
| 2092 | = debug_info_sections.begin(); |
| 2093 | p != debug_info_sections.end(); |
| 2094 | ++p) |
| 2095 | { |
| 2096 | unsigned int i = *p; |
| 2097 | layout->add_to_gdb_index(false, this, NULL, 0, i, 0, 0); |
| 2098 | } |
| 2099 | for (std::vector<unsigned int>::const_iterator p |
| 2100 | = debug_types_sections.begin(); |
| 2101 | p != debug_types_sections.end(); |
| 2102 | ++p) |
| 2103 | { |
| 2104 | unsigned int i = *p; |
| 2105 | layout->add_to_gdb_index(true, this, 0, 0, i, 0, 0); |
| 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | // Layout sections whose layout was deferred while waiting for |
| 2110 | // input files from a plugin. |
| 2111 | template<int size, bool big_endian> |
| 2112 | void |
| 2113 | Sized_relobj_incr<size, big_endian>::do_layout_deferred_sections(Layout*) |
| 2114 | { |
| 2115 | } |
| 2116 | |
| 2117 | // Add the symbols to the symbol table. |
| 2118 | |
| 2119 | template<int size, bool big_endian> |
| 2120 | void |
| 2121 | Sized_relobj_incr<size, big_endian>::do_add_symbols( |
| 2122 | Symbol_table* symtab, |
| 2123 | Read_symbols_data*, |
| 2124 | Layout*) |
| 2125 | { |
| 2126 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2127 | unsigned char symbuf[sym_size]; |
| 2128 | elfcpp::Sym<size, big_endian> sym(symbuf); |
| 2129 | elfcpp::Sym_write<size, big_endian> osym(symbuf); |
| 2130 | |
| 2131 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; |
| 2132 | |
| 2133 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); |
| 2134 | this->symbols_.resize(nsyms); |
| 2135 | |
| 2136 | Incremental_binary::View symtab_view(NULL); |
| 2137 | unsigned int symtab_count; |
| 2138 | elfcpp::Elf_strtab strtab(NULL, 0); |
| 2139 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); |
| 2140 | |
| 2141 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
| 2142 | unsigned int isym_count = isymtab.symbol_count(); |
| 2143 | unsigned int first_global = symtab_count - isym_count; |
| 2144 | |
| 2145 | const unsigned char* sym_p; |
| 2146 | for (unsigned int i = 0; i < nsyms; ++i) |
| 2147 | { |
| 2148 | Incremental_global_symbol_reader<big_endian> info = |
| 2149 | this->input_reader_.get_global_symbol_reader(i); |
| 2150 | unsigned int output_symndx = info.output_symndx(); |
| 2151 | sym_p = symtab_view.data() + output_symndx * sym_size; |
| 2152 | elfcpp::Sym<size, big_endian> gsym(sym_p); |
| 2153 | const char* name; |
| 2154 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) |
| 2155 | name = ""; |
| 2156 | |
| 2157 | typename elfcpp::Elf_types<size>::Elf_Addr v = gsym.get_st_value(); |
| 2158 | unsigned int shndx = gsym.get_st_shndx(); |
| 2159 | elfcpp::STB st_bind = gsym.get_st_bind(); |
| 2160 | elfcpp::STT st_type = gsym.get_st_type(); |
| 2161 | |
| 2162 | // Local hidden symbols start out as globals, but get converted to |
| 2163 | // to local during output. |
| 2164 | if (st_bind == elfcpp::STB_LOCAL) |
| 2165 | st_bind = elfcpp::STB_GLOBAL; |
| 2166 | |
| 2167 | unsigned int input_shndx = info.shndx(); |
| 2168 | if (input_shndx == 0 || input_shndx == -1U) |
| 2169 | { |
| 2170 | shndx = elfcpp::SHN_UNDEF; |
| 2171 | v = 0; |
| 2172 | } |
| 2173 | else if (shndx != elfcpp::SHN_ABS) |
| 2174 | { |
| 2175 | // Find the input section and calculate the section-relative value. |
| 2176 | gold_assert(shndx != elfcpp::SHN_UNDEF); |
| 2177 | Output_section* os = this->ibase_->output_section(shndx); |
| 2178 | gold_assert(os != NULL && os->has_fixed_layout()); |
| 2179 | typename Input_entry_reader::Input_section_info sect = |
| 2180 | this->input_reader_.get_input_section(input_shndx - 1); |
| 2181 | gold_assert(sect.output_shndx == shndx); |
| 2182 | if (st_type != elfcpp::STT_TLS) |
| 2183 | v -= os->address(); |
| 2184 | v -= sect.sh_offset; |
| 2185 | shndx = input_shndx; |
| 2186 | } |
| 2187 | |
| 2188 | osym.put_st_name(0); |
| 2189 | osym.put_st_value(v); |
| 2190 | osym.put_st_size(gsym.get_st_size()); |
| 2191 | osym.put_st_info(st_bind, st_type); |
| 2192 | osym.put_st_other(gsym.get_st_other()); |
| 2193 | osym.put_st_shndx(shndx); |
| 2194 | |
| 2195 | Symbol* res = symtab->add_from_incrobj(this, name, NULL, &sym); |
| 2196 | |
| 2197 | if (shndx != elfcpp::SHN_UNDEF) |
| 2198 | ++this->defined_count_; |
| 2199 | |
| 2200 | // If this is a linker-defined symbol that hasn't yet been defined, |
| 2201 | // define it now. |
| 2202 | if (input_shndx == -1U && !res->is_defined()) |
| 2203 | { |
| 2204 | shndx = gsym.get_st_shndx(); |
| 2205 | v = gsym.get_st_value(); |
| 2206 | Elf_size_type symsize = gsym.get_st_size(); |
| 2207 | if (shndx == elfcpp::SHN_ABS) |
| 2208 | { |
| 2209 | symtab->define_as_constant(name, NULL, |
| 2210 | Symbol_table::INCREMENTAL_BASE, |
| 2211 | v, symsize, st_type, st_bind, |
| 2212 | gsym.get_st_visibility(), 0, |
| 2213 | false, false); |
| 2214 | } |
| 2215 | else |
| 2216 | { |
| 2217 | Output_section* os = this->ibase_->output_section(shndx); |
| 2218 | gold_assert(os != NULL && os->has_fixed_layout()); |
| 2219 | v -= os->address(); |
| 2220 | if (symsize > 0) |
| 2221 | os->reserve(v, symsize); |
| 2222 | symtab->define_in_output_data(name, NULL, |
| 2223 | Symbol_table::INCREMENTAL_BASE, |
| 2224 | os, v, symsize, st_type, st_bind, |
| 2225 | gsym.get_st_visibility(), 0, |
| 2226 | false, false); |
| 2227 | } |
| 2228 | } |
| 2229 | |
| 2230 | this->symbols_[i] = res; |
| 2231 | this->ibase_->add_global_symbol(output_symndx - first_global, res); |
| 2232 | } |
| 2233 | } |
| 2234 | |
| 2235 | // Return TRUE if we should include this object from an archive library. |
| 2236 | |
| 2237 | template<int size, bool big_endian> |
| 2238 | Archive::Should_include |
| 2239 | Sized_relobj_incr<size, big_endian>::do_should_include_member( |
| 2240 | Symbol_table*, |
| 2241 | Layout*, |
| 2242 | Read_symbols_data*, |
| 2243 | std::string*) |
| 2244 | { |
| 2245 | gold_unreachable(); |
| 2246 | } |
| 2247 | |
| 2248 | // Iterate over global symbols, calling a visitor class V for each. |
| 2249 | |
| 2250 | template<int size, bool big_endian> |
| 2251 | void |
| 2252 | Sized_relobj_incr<size, big_endian>::do_for_all_global_symbols( |
| 2253 | Read_symbols_data*, |
| 2254 | Library_base::Symbol_visitor_base*) |
| 2255 | { |
| 2256 | // This routine is not used for incremental objects. |
| 2257 | } |
| 2258 | |
| 2259 | // Get the size of a section. |
| 2260 | |
| 2261 | template<int size, bool big_endian> |
| 2262 | uint64_t |
| 2263 | Sized_relobj_incr<size, big_endian>::do_section_size(unsigned int) |
| 2264 | { |
| 2265 | gold_unreachable(); |
| 2266 | } |
| 2267 | |
| 2268 | // Get the name of a section. This returns the name of the output |
| 2269 | // section, because we don't usually track the names of the input |
| 2270 | // sections. |
| 2271 | |
| 2272 | template<int size, bool big_endian> |
| 2273 | std::string |
| 2274 | Sized_relobj_incr<size, big_endian>::do_section_name(unsigned int shndx) const |
| 2275 | { |
| 2276 | const Output_sections& out_sections(this->output_sections()); |
| 2277 | const Output_section* os = out_sections[shndx]; |
| 2278 | if (os == NULL) |
| 2279 | return NULL; |
| 2280 | return os->name(); |
| 2281 | } |
| 2282 | |
| 2283 | // Return a view of the contents of a section. |
| 2284 | |
| 2285 | template<int size, bool big_endian> |
| 2286 | const unsigned char* |
| 2287 | Sized_relobj_incr<size, big_endian>::do_section_contents( |
| 2288 | unsigned int shndx, |
| 2289 | section_size_type* plen, |
| 2290 | bool) |
| 2291 | { |
| 2292 | Output_sections& out_sections(this->output_sections()); |
| 2293 | Output_section* os = out_sections[shndx]; |
| 2294 | gold_assert(os != NULL); |
| 2295 | off_t section_offset = os->offset(); |
| 2296 | typename Input_entry_reader::Input_section_info sect = |
| 2297 | this->input_reader_.get_input_section(shndx - 1); |
| 2298 | section_offset += sect.sh_offset; |
| 2299 | *plen = sect.sh_size; |
| 2300 | return this->ibase_->view(section_offset, sect.sh_size).data(); |
| 2301 | } |
| 2302 | |
| 2303 | // Return section flags. |
| 2304 | |
| 2305 | template<int size, bool big_endian> |
| 2306 | uint64_t |
| 2307 | Sized_relobj_incr<size, big_endian>::do_section_flags(unsigned int) |
| 2308 | { |
| 2309 | gold_unreachable(); |
| 2310 | } |
| 2311 | |
| 2312 | // Return section entsize. |
| 2313 | |
| 2314 | template<int size, bool big_endian> |
| 2315 | uint64_t |
| 2316 | Sized_relobj_incr<size, big_endian>::do_section_entsize(unsigned int) |
| 2317 | { |
| 2318 | gold_unreachable(); |
| 2319 | } |
| 2320 | |
| 2321 | // Return section address. |
| 2322 | |
| 2323 | template<int size, bool big_endian> |
| 2324 | uint64_t |
| 2325 | Sized_relobj_incr<size, big_endian>::do_section_address(unsigned int) |
| 2326 | { |
| 2327 | gold_unreachable(); |
| 2328 | } |
| 2329 | |
| 2330 | // Return section type. |
| 2331 | |
| 2332 | template<int size, bool big_endian> |
| 2333 | unsigned int |
| 2334 | Sized_relobj_incr<size, big_endian>::do_section_type(unsigned int) |
| 2335 | { |
| 2336 | gold_unreachable(); |
| 2337 | } |
| 2338 | |
| 2339 | // Return the section link field. |
| 2340 | |
| 2341 | template<int size, bool big_endian> |
| 2342 | unsigned int |
| 2343 | Sized_relobj_incr<size, big_endian>::do_section_link(unsigned int) |
| 2344 | { |
| 2345 | gold_unreachable(); |
| 2346 | } |
| 2347 | |
| 2348 | // Return the section link field. |
| 2349 | |
| 2350 | template<int size, bool big_endian> |
| 2351 | unsigned int |
| 2352 | Sized_relobj_incr<size, big_endian>::do_section_info(unsigned int) |
| 2353 | { |
| 2354 | gold_unreachable(); |
| 2355 | } |
| 2356 | |
| 2357 | // Return the section alignment. |
| 2358 | |
| 2359 | template<int size, bool big_endian> |
| 2360 | uint64_t |
| 2361 | Sized_relobj_incr<size, big_endian>::do_section_addralign(unsigned int) |
| 2362 | { |
| 2363 | gold_unreachable(); |
| 2364 | } |
| 2365 | |
| 2366 | // Return the Xindex structure to use. |
| 2367 | |
| 2368 | template<int size, bool big_endian> |
| 2369 | Xindex* |
| 2370 | Sized_relobj_incr<size, big_endian>::do_initialize_xindex() |
| 2371 | { |
| 2372 | gold_unreachable(); |
| 2373 | } |
| 2374 | |
| 2375 | // Get symbol counts. |
| 2376 | |
| 2377 | template<int size, bool big_endian> |
| 2378 | void |
| 2379 | Sized_relobj_incr<size, big_endian>::do_get_global_symbol_counts( |
| 2380 | const Symbol_table*, |
| 2381 | size_t* defined, |
| 2382 | size_t* used) const |
| 2383 | { |
| 2384 | *defined = this->defined_count_; |
| 2385 | size_t count = 0; |
| 2386 | for (typename Symbols::const_iterator p = this->symbols_.begin(); |
| 2387 | p != this->symbols_.end(); |
| 2388 | ++p) |
| 2389 | if (*p != NULL |
| 2390 | && (*p)->source() == Symbol::FROM_OBJECT |
| 2391 | && (*p)->object() == this |
| 2392 | && (*p)->is_defined()) |
| 2393 | ++count; |
| 2394 | *used = count; |
| 2395 | } |
| 2396 | |
| 2397 | // Read the relocs. |
| 2398 | |
| 2399 | template<int size, bool big_endian> |
| 2400 | void |
| 2401 | Sized_relobj_incr<size, big_endian>::do_read_relocs(Read_relocs_data*) |
| 2402 | { |
| 2403 | } |
| 2404 | |
| 2405 | // Process the relocs to find list of referenced sections. Used only |
| 2406 | // during garbage collection. |
| 2407 | |
| 2408 | template<int size, bool big_endian> |
| 2409 | void |
| 2410 | Sized_relobj_incr<size, big_endian>::do_gc_process_relocs(Symbol_table*, |
| 2411 | Layout*, |
| 2412 | Read_relocs_data*) |
| 2413 | { |
| 2414 | gold_unreachable(); |
| 2415 | } |
| 2416 | |
| 2417 | // Scan the relocs and adjust the symbol table. |
| 2418 | |
| 2419 | template<int size, bool big_endian> |
| 2420 | void |
| 2421 | Sized_relobj_incr<size, big_endian>::do_scan_relocs(Symbol_table*, |
| 2422 | Layout* layout, |
| 2423 | Read_relocs_data*) |
| 2424 | { |
| 2425 | // Count the incremental relocations for this object. |
| 2426 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); |
| 2427 | this->allocate_incremental_reloc_counts(); |
| 2428 | for (unsigned int i = 0; i < nsyms; i++) |
| 2429 | { |
| 2430 | Incremental_global_symbol_reader<big_endian> sym = |
| 2431 | this->input_reader_.get_global_symbol_reader(i); |
| 2432 | unsigned int reloc_count = sym.reloc_count(); |
| 2433 | if (reloc_count > 0 && this->incr_reloc_offset_ == -1U) |
| 2434 | this->incr_reloc_offset_ = sym.reloc_offset(); |
| 2435 | this->incr_reloc_count_ += reloc_count; |
| 2436 | for (unsigned int j = 0; j < reloc_count; j++) |
| 2437 | this->count_incremental_reloc(i); |
| 2438 | } |
| 2439 | this->incr_reloc_output_index_ = |
| 2440 | layout->incremental_inputs()->get_reloc_count(); |
| 2441 | this->finalize_incremental_relocs(layout, false); |
| 2442 | |
| 2443 | // The incoming incremental relocations may not end up in the same |
| 2444 | // location after the incremental update, because the incremental info |
| 2445 | // is regenerated in each link. Because the new location may overlap |
| 2446 | // with other data in the updated output file, we need to copy the |
| 2447 | // relocations into a buffer so that we can still read them safely |
| 2448 | // after we start writing updates to the output file. |
| 2449 | if (this->incr_reloc_count_ > 0) |
| 2450 | { |
| 2451 | const Incremental_relocs_reader<size, big_endian>& relocs_reader = |
| 2452 | this->ibase_->relocs_reader(); |
| 2453 | const unsigned int incr_reloc_size = relocs_reader.reloc_size; |
| 2454 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; |
| 2455 | this->incr_relocs_ = new unsigned char[len]; |
| 2456 | memcpy(this->incr_relocs_, |
| 2457 | relocs_reader.data(this->incr_reloc_offset_), |
| 2458 | len); |
| 2459 | } |
| 2460 | } |
| 2461 | |
| 2462 | // Count the local symbols. |
| 2463 | |
| 2464 | template<int size, bool big_endian> |
| 2465 | void |
| 2466 | Sized_relobj_incr<size, big_endian>::do_count_local_symbols( |
| 2467 | Stringpool_template<char>* pool, |
| 2468 | Stringpool_template<char>*) |
| 2469 | { |
| 2470 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2471 | |
| 2472 | // Set the count of local symbols based on the incremental info. |
| 2473 | unsigned int nlocals = this->input_reader_.get_local_symbol_count(); |
| 2474 | this->local_symbol_count_ = nlocals; |
| 2475 | this->local_symbols_.reserve(nlocals); |
| 2476 | |
| 2477 | // Get views of the base file's symbol table and string table. |
| 2478 | Incremental_binary::View symtab_view(NULL); |
| 2479 | unsigned int symtab_count; |
| 2480 | elfcpp::Elf_strtab strtab(NULL, 0); |
| 2481 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); |
| 2482 | |
| 2483 | // Read the local symbols from the base file's symbol table. |
| 2484 | off_t off = this->input_reader_.get_local_symbol_offset(); |
| 2485 | const unsigned char* symp = symtab_view.data() + off; |
| 2486 | for (unsigned int i = 0; i < nlocals; ++i, symp += sym_size) |
| 2487 | { |
| 2488 | elfcpp::Sym<size, big_endian> sym(symp); |
| 2489 | const char* name; |
| 2490 | if (!strtab.get_c_string(sym.get_st_name(), &name)) |
| 2491 | name = ""; |
| 2492 | gold_debug(DEBUG_INCREMENTAL, "Local symbol %d: %s", i, name); |
| 2493 | name = pool->add(name, true, NULL); |
| 2494 | this->local_symbols_.push_back(Local_symbol(name, |
| 2495 | sym.get_st_value(), |
| 2496 | sym.get_st_size(), |
| 2497 | sym.get_st_shndx(), |
| 2498 | sym.get_st_type(), |
| 2499 | false)); |
| 2500 | } |
| 2501 | } |
| 2502 | |
| 2503 | // Finalize the local symbols. |
| 2504 | |
| 2505 | template<int size, bool big_endian> |
| 2506 | unsigned int |
| 2507 | Sized_relobj_incr<size, big_endian>::do_finalize_local_symbols( |
| 2508 | unsigned int index, |
| 2509 | off_t off, |
| 2510 | Symbol_table*) |
| 2511 | { |
| 2512 | this->local_symbol_index_ = index; |
| 2513 | this->local_symbol_offset_ = off; |
| 2514 | return index + this->local_symbol_count_; |
| 2515 | } |
| 2516 | |
| 2517 | // Set the offset where local dynamic symbol information will be stored. |
| 2518 | |
| 2519 | template<int size, bool big_endian> |
| 2520 | unsigned int |
| 2521 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_indexes( |
| 2522 | unsigned int index) |
| 2523 | { |
| 2524 | // FIXME: set local dynsym indexes. |
| 2525 | return index; |
| 2526 | } |
| 2527 | |
| 2528 | // Set the offset where local dynamic symbol information will be stored. |
| 2529 | |
| 2530 | template<int size, bool big_endian> |
| 2531 | unsigned int |
| 2532 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_offset(off_t) |
| 2533 | { |
| 2534 | return 0; |
| 2535 | } |
| 2536 | |
| 2537 | // Relocate the input sections and write out the local symbols. |
| 2538 | // We don't actually do any relocation here. For unchanged input files, |
| 2539 | // we reapply relocations only for symbols that have changed; that happens |
| 2540 | // in Layout_task_runner::run(). We do need to rewrite the incremental |
| 2541 | // relocations for this object. |
| 2542 | |
| 2543 | template<int size, bool big_endian> |
| 2544 | void |
| 2545 | Sized_relobj_incr<size, big_endian>::do_relocate(const Symbol_table*, |
| 2546 | const Layout* layout, |
| 2547 | Output_file* of) |
| 2548 | { |
| 2549 | if (this->incr_reloc_count_ == 0) |
| 2550 | return; |
| 2551 | |
| 2552 | const unsigned int incr_reloc_size = |
| 2553 | Incremental_relocs_reader<size, big_endian>::reloc_size; |
| 2554 | |
| 2555 | // Get a view for the .gnu_incremental_relocs section. |
| 2556 | Incremental_inputs* inputs = layout->incremental_inputs(); |
| 2557 | gold_assert(inputs != NULL); |
| 2558 | const off_t relocs_off = inputs->relocs_section()->offset(); |
| 2559 | const off_t relocs_size = inputs->relocs_section()->data_size(); |
| 2560 | unsigned char* const view = of->get_output_view(relocs_off, relocs_size); |
| 2561 | |
| 2562 | // Copy the relocations from the buffer. |
| 2563 | off_t off = this->incr_reloc_output_index_ * incr_reloc_size; |
| 2564 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; |
| 2565 | memcpy(view + off, this->incr_relocs_, len); |
| 2566 | |
| 2567 | // The output section table may have changed, so we need to map |
| 2568 | // the old section index to the new section index for each relocation. |
| 2569 | for (unsigned int i = 0; i < this->incr_reloc_count_; ++i) |
| 2570 | { |
| 2571 | unsigned char* pov = view + off + i * incr_reloc_size; |
| 2572 | unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(pov + 4); |
| 2573 | Output_section* os = this->ibase_->output_section(shndx); |
| 2574 | gold_assert(os != NULL); |
| 2575 | shndx = os->out_shndx(); |
| 2576 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, shndx); |
| 2577 | } |
| 2578 | |
| 2579 | of->write_output_view(off, len, view); |
| 2580 | |
| 2581 | // Get views into the output file for the portions of the symbol table |
| 2582 | // and the dynamic symbol table that we will be writing. |
| 2583 | off_t symtab_off = layout->symtab_section()->offset(); |
| 2584 | off_t output_size = this->local_symbol_count_ * This::sym_size; |
| 2585 | unsigned char* oview = NULL; |
| 2586 | if (output_size > 0) |
| 2587 | oview = of->get_output_view(symtab_off + this->local_symbol_offset_, |
| 2588 | output_size); |
| 2589 | |
| 2590 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; |
| 2591 | unsigned char* dyn_oview = NULL; |
| 2592 | if (dyn_output_size > 0) |
| 2593 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, |
| 2594 | dyn_output_size); |
| 2595 | |
| 2596 | // Write the local symbols. |
| 2597 | unsigned char* ov = oview; |
| 2598 | unsigned char* dyn_ov = dyn_oview; |
| 2599 | const Stringpool* sympool = layout->sympool(); |
| 2600 | const Stringpool* dynpool = layout->dynpool(); |
| 2601 | Output_symtab_xindex* symtab_xindex = layout->symtab_xindex(); |
| 2602 | Output_symtab_xindex* dynsym_xindex = layout->dynsym_xindex(); |
| 2603 | for (unsigned int i = 0; i < this->local_symbol_count_; ++i) |
| 2604 | { |
| 2605 | Local_symbol& lsym(this->local_symbols_[i]); |
| 2606 | |
| 2607 | bool is_ordinary; |
| 2608 | unsigned int st_shndx = this->adjust_sym_shndx(i, lsym.st_shndx, |
| 2609 | &is_ordinary); |
| 2610 | if (is_ordinary) |
| 2611 | { |
| 2612 | Output_section* os = this->ibase_->output_section(st_shndx); |
| 2613 | st_shndx = os->out_shndx(); |
| 2614 | if (st_shndx >= elfcpp::SHN_LORESERVE) |
| 2615 | { |
| 2616 | symtab_xindex->add(this->local_symbol_index_ + i, st_shndx); |
| 2617 | if (lsym.needs_dynsym_entry) |
| 2618 | dynsym_xindex->add(lsym.output_dynsym_index, st_shndx); |
| 2619 | st_shndx = elfcpp::SHN_XINDEX; |
| 2620 | } |
| 2621 | } |
| 2622 | |
| 2623 | // Write the symbol to the output symbol table. |
| 2624 | { |
| 2625 | elfcpp::Sym_write<size, big_endian> osym(ov); |
| 2626 | osym.put_st_name(sympool->get_offset(lsym.name)); |
| 2627 | osym.put_st_value(lsym.st_value); |
| 2628 | osym.put_st_size(lsym.st_size); |
| 2629 | osym.put_st_info(elfcpp::STB_LOCAL, |
| 2630 | static_cast<elfcpp::STT>(lsym.st_type)); |
| 2631 | osym.put_st_other(0); |
| 2632 | osym.put_st_shndx(st_shndx); |
| 2633 | ov += sym_size; |
| 2634 | } |
| 2635 | |
| 2636 | // Write the symbol to the output dynamic symbol table. |
| 2637 | if (lsym.needs_dynsym_entry) |
| 2638 | { |
| 2639 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); |
| 2640 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); |
| 2641 | osym.put_st_name(dynpool->get_offset(lsym.name)); |
| 2642 | osym.put_st_value(lsym.st_value); |
| 2643 | osym.put_st_size(lsym.st_size); |
| 2644 | osym.put_st_info(elfcpp::STB_LOCAL, |
| 2645 | static_cast<elfcpp::STT>(lsym.st_type)); |
| 2646 | osym.put_st_other(0); |
| 2647 | osym.put_st_shndx(st_shndx); |
| 2648 | dyn_ov += sym_size; |
| 2649 | } |
| 2650 | } |
| 2651 | |
| 2652 | if (output_size > 0) |
| 2653 | { |
| 2654 | gold_assert(ov - oview == output_size); |
| 2655 | of->write_output_view(symtab_off + this->local_symbol_offset_, |
| 2656 | output_size, oview); |
| 2657 | } |
| 2658 | |
| 2659 | if (dyn_output_size > 0) |
| 2660 | { |
| 2661 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); |
| 2662 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, |
| 2663 | dyn_oview); |
| 2664 | } |
| 2665 | } |
| 2666 | |
| 2667 | // Set the offset of a section. |
| 2668 | |
| 2669 | template<int size, bool big_endian> |
| 2670 | void |
| 2671 | Sized_relobj_incr<size, big_endian>::do_set_section_offset(unsigned int, |
| 2672 | uint64_t) |
| 2673 | { |
| 2674 | } |
| 2675 | |
| 2676 | // Class Sized_incr_dynobj. Most of these methods are not used for |
| 2677 | // Incremental objects, but are required to be implemented by the |
| 2678 | // base class Object. |
| 2679 | |
| 2680 | template<int size, bool big_endian> |
| 2681 | Sized_incr_dynobj<size, big_endian>::Sized_incr_dynobj( |
| 2682 | const std::string& name, |
| 2683 | Sized_incremental_binary<size, big_endian>* ibase, |
| 2684 | unsigned int input_file_index) |
| 2685 | : Dynobj(name, NULL), ibase_(ibase), |
| 2686 | input_file_index_(input_file_index), |
| 2687 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), |
| 2688 | symbols_(), defined_count_(0) |
| 2689 | { |
| 2690 | if (this->input_reader_.is_in_system_directory()) |
| 2691 | this->set_is_in_system_directory(); |
| 2692 | if (this->input_reader_.as_needed()) |
| 2693 | this->set_as_needed(); |
| 2694 | this->set_soname_string(this->input_reader_.get_soname()); |
| 2695 | this->set_shnum(0); |
| 2696 | } |
| 2697 | |
| 2698 | // Read the symbols. |
| 2699 | |
| 2700 | template<int size, bool big_endian> |
| 2701 | void |
| 2702 | Sized_incr_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data*) |
| 2703 | { |
| 2704 | gold_unreachable(); |
| 2705 | } |
| 2706 | |
| 2707 | // Lay out the input sections. |
| 2708 | |
| 2709 | template<int size, bool big_endian> |
| 2710 | void |
| 2711 | Sized_incr_dynobj<size, big_endian>::do_layout( |
| 2712 | Symbol_table*, |
| 2713 | Layout*, |
| 2714 | Read_symbols_data*) |
| 2715 | { |
| 2716 | } |
| 2717 | |
| 2718 | // Add the symbols to the symbol table. |
| 2719 | |
| 2720 | template<int size, bool big_endian> |
| 2721 | void |
| 2722 | Sized_incr_dynobj<size, big_endian>::do_add_symbols( |
| 2723 | Symbol_table* symtab, |
| 2724 | Read_symbols_data*, |
| 2725 | Layout*) |
| 2726 | { |
| 2727 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2728 | unsigned char symbuf[sym_size]; |
| 2729 | elfcpp::Sym<size, big_endian> sym(symbuf); |
| 2730 | elfcpp::Sym_write<size, big_endian> osym(symbuf); |
| 2731 | |
| 2732 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); |
| 2733 | this->symbols_.resize(nsyms); |
| 2734 | |
| 2735 | Incremental_binary::View symtab_view(NULL); |
| 2736 | unsigned int symtab_count; |
| 2737 | elfcpp::Elf_strtab strtab(NULL, 0); |
| 2738 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); |
| 2739 | |
| 2740 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
| 2741 | unsigned int isym_count = isymtab.symbol_count(); |
| 2742 | unsigned int first_global = symtab_count - isym_count; |
| 2743 | |
| 2744 | // We keep a set of symbols that we have generated COPY relocations |
| 2745 | // for, indexed by the symbol value. We do not need more than one |
| 2746 | // COPY relocation per address. |
| 2747 | typedef typename std::set<Address> Copied_symbols; |
| 2748 | Copied_symbols copied_symbols; |
| 2749 | |
| 2750 | const unsigned char* sym_p; |
| 2751 | for (unsigned int i = 0; i < nsyms; ++i) |
| 2752 | { |
| 2753 | bool is_def; |
| 2754 | bool is_copy; |
| 2755 | unsigned int output_symndx = |
| 2756 | this->input_reader_.get_output_symbol_index(i, &is_def, &is_copy); |
| 2757 | sym_p = symtab_view.data() + output_symndx * sym_size; |
| 2758 | elfcpp::Sym<size, big_endian> gsym(sym_p); |
| 2759 | const char* name; |
| 2760 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) |
| 2761 | name = ""; |
| 2762 | |
| 2763 | Address v; |
| 2764 | unsigned int shndx; |
| 2765 | elfcpp::STB st_bind = gsym.get_st_bind(); |
| 2766 | elfcpp::STT st_type = gsym.get_st_type(); |
| 2767 | |
| 2768 | // Local hidden symbols start out as globals, but get converted to |
| 2769 | // to local during output. |
| 2770 | if (st_bind == elfcpp::STB_LOCAL) |
| 2771 | st_bind = elfcpp::STB_GLOBAL; |
| 2772 | |
| 2773 | if (!is_def) |
| 2774 | { |
| 2775 | shndx = elfcpp::SHN_UNDEF; |
| 2776 | v = 0; |
| 2777 | } |
| 2778 | else |
| 2779 | { |
| 2780 | // For a symbol defined in a shared object, the section index |
| 2781 | // is meaningless, as long as it's not SHN_UNDEF. |
| 2782 | shndx = 1; |
| 2783 | v = gsym.get_st_value(); |
| 2784 | ++this->defined_count_; |
| 2785 | } |
| 2786 | |
| 2787 | osym.put_st_name(0); |
| 2788 | osym.put_st_value(v); |
| 2789 | osym.put_st_size(gsym.get_st_size()); |
| 2790 | osym.put_st_info(st_bind, st_type); |
| 2791 | osym.put_st_other(gsym.get_st_other()); |
| 2792 | osym.put_st_shndx(shndx); |
| 2793 | |
| 2794 | Sized_symbol<size>* res = |
| 2795 | symtab->add_from_incrobj<size, big_endian>(this, name, NULL, &sym); |
| 2796 | this->symbols_[i] = res; |
| 2797 | this->ibase_->add_global_symbol(output_symndx - first_global, |
| 2798 | this->symbols_[i]); |
| 2799 | |
| 2800 | if (is_copy) |
| 2801 | { |
| 2802 | std::pair<typename Copied_symbols::iterator, bool> ins = |
| 2803 | copied_symbols.insert(v); |
| 2804 | if (ins.second) |
| 2805 | { |
| 2806 | unsigned int shndx = gsym.get_st_shndx(); |
| 2807 | Output_section* os = this->ibase_->output_section(shndx); |
| 2808 | off_t offset = v - os->address(); |
| 2809 | this->ibase_->add_copy_reloc(this->symbols_[i], os, offset); |
| 2810 | } |
| 2811 | } |
| 2812 | } |
| 2813 | } |
| 2814 | |
| 2815 | // Return TRUE if we should include this object from an archive library. |
| 2816 | |
| 2817 | template<int size, bool big_endian> |
| 2818 | Archive::Should_include |
| 2819 | Sized_incr_dynobj<size, big_endian>::do_should_include_member( |
| 2820 | Symbol_table*, |
| 2821 | Layout*, |
| 2822 | Read_symbols_data*, |
| 2823 | std::string*) |
| 2824 | { |
| 2825 | gold_unreachable(); |
| 2826 | } |
| 2827 | |
| 2828 | // Iterate over global symbols, calling a visitor class V for each. |
| 2829 | |
| 2830 | template<int size, bool big_endian> |
| 2831 | void |
| 2832 | Sized_incr_dynobj<size, big_endian>::do_for_all_global_symbols( |
| 2833 | Read_symbols_data*, |
| 2834 | Library_base::Symbol_visitor_base*) |
| 2835 | { |
| 2836 | // This routine is not used for dynamic libraries. |
| 2837 | } |
| 2838 | |
| 2839 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
| 2840 | // associated with a local symbol. |
| 2841 | |
| 2842 | template<int size, bool big_endian> |
| 2843 | void |
| 2844 | Sized_incr_dynobj<size, big_endian>::do_for_all_local_got_entries( |
| 2845 | Got_offset_list::Visitor*) const |
| 2846 | { |
| 2847 | } |
| 2848 | |
| 2849 | // Get the size of a section. |
| 2850 | |
| 2851 | template<int size, bool big_endian> |
| 2852 | uint64_t |
| 2853 | Sized_incr_dynobj<size, big_endian>::do_section_size(unsigned int) |
| 2854 | { |
| 2855 | gold_unreachable(); |
| 2856 | } |
| 2857 | |
| 2858 | // Get the name of a section. |
| 2859 | |
| 2860 | template<int size, bool big_endian> |
| 2861 | std::string |
| 2862 | Sized_incr_dynobj<size, big_endian>::do_section_name(unsigned int) const |
| 2863 | { |
| 2864 | gold_unreachable(); |
| 2865 | } |
| 2866 | |
| 2867 | // Return a view of the contents of a section. |
| 2868 | |
| 2869 | template<int size, bool big_endian> |
| 2870 | const unsigned char* |
| 2871 | Sized_incr_dynobj<size, big_endian>::do_section_contents( |
| 2872 | unsigned int, |
| 2873 | section_size_type*, |
| 2874 | bool) |
| 2875 | { |
| 2876 | gold_unreachable(); |
| 2877 | } |
| 2878 | |
| 2879 | // Return section flags. |
| 2880 | |
| 2881 | template<int size, bool big_endian> |
| 2882 | uint64_t |
| 2883 | Sized_incr_dynobj<size, big_endian>::do_section_flags(unsigned int) |
| 2884 | { |
| 2885 | gold_unreachable(); |
| 2886 | } |
| 2887 | |
| 2888 | // Return section entsize. |
| 2889 | |
| 2890 | template<int size, bool big_endian> |
| 2891 | uint64_t |
| 2892 | Sized_incr_dynobj<size, big_endian>::do_section_entsize(unsigned int) |
| 2893 | { |
| 2894 | gold_unreachable(); |
| 2895 | } |
| 2896 | |
| 2897 | // Return section address. |
| 2898 | |
| 2899 | template<int size, bool big_endian> |
| 2900 | uint64_t |
| 2901 | Sized_incr_dynobj<size, big_endian>::do_section_address(unsigned int) |
| 2902 | { |
| 2903 | gold_unreachable(); |
| 2904 | } |
| 2905 | |
| 2906 | // Return section type. |
| 2907 | |
| 2908 | template<int size, bool big_endian> |
| 2909 | unsigned int |
| 2910 | Sized_incr_dynobj<size, big_endian>::do_section_type(unsigned int) |
| 2911 | { |
| 2912 | gold_unreachable(); |
| 2913 | } |
| 2914 | |
| 2915 | // Return the section link field. |
| 2916 | |
| 2917 | template<int size, bool big_endian> |
| 2918 | unsigned int |
| 2919 | Sized_incr_dynobj<size, big_endian>::do_section_link(unsigned int) |
| 2920 | { |
| 2921 | gold_unreachable(); |
| 2922 | } |
| 2923 | |
| 2924 | // Return the section link field. |
| 2925 | |
| 2926 | template<int size, bool big_endian> |
| 2927 | unsigned int |
| 2928 | Sized_incr_dynobj<size, big_endian>::do_section_info(unsigned int) |
| 2929 | { |
| 2930 | gold_unreachable(); |
| 2931 | } |
| 2932 | |
| 2933 | // Return the section alignment. |
| 2934 | |
| 2935 | template<int size, bool big_endian> |
| 2936 | uint64_t |
| 2937 | Sized_incr_dynobj<size, big_endian>::do_section_addralign(unsigned int) |
| 2938 | { |
| 2939 | gold_unreachable(); |
| 2940 | } |
| 2941 | |
| 2942 | // Return the Xindex structure to use. |
| 2943 | |
| 2944 | template<int size, bool big_endian> |
| 2945 | Xindex* |
| 2946 | Sized_incr_dynobj<size, big_endian>::do_initialize_xindex() |
| 2947 | { |
| 2948 | gold_unreachable(); |
| 2949 | } |
| 2950 | |
| 2951 | // Get symbol counts. |
| 2952 | |
| 2953 | template<int size, bool big_endian> |
| 2954 | void |
| 2955 | Sized_incr_dynobj<size, big_endian>::do_get_global_symbol_counts( |
| 2956 | const Symbol_table*, |
| 2957 | size_t* defined, |
| 2958 | size_t* used) const |
| 2959 | { |
| 2960 | *defined = this->defined_count_; |
| 2961 | size_t count = 0; |
| 2962 | for (typename Symbols::const_iterator p = this->symbols_.begin(); |
| 2963 | p != this->symbols_.end(); |
| 2964 | ++p) |
| 2965 | if (*p != NULL |
| 2966 | && (*p)->source() == Symbol::FROM_OBJECT |
| 2967 | && (*p)->object() == this |
| 2968 | && (*p)->is_defined() |
| 2969 | && (*p)->dynsym_index() != -1U) |
| 2970 | ++count; |
| 2971 | *used = count; |
| 2972 | } |
| 2973 | |
| 2974 | // Allocate an incremental object of the appropriate size and endianness. |
| 2975 | |
| 2976 | Object* |
| 2977 | make_sized_incremental_object( |
| 2978 | Incremental_binary* ibase, |
| 2979 | unsigned int input_file_index, |
| 2980 | Incremental_input_type input_type, |
| 2981 | const Incremental_binary::Input_reader* input_reader) |
| 2982 | { |
| 2983 | Object* obj = NULL; |
| 2984 | std::string name(input_reader->filename()); |
| 2985 | |
| 2986 | switch (parameters->size_and_endianness()) |
| 2987 | { |
| 2988 | #ifdef HAVE_TARGET_32_LITTLE |
| 2989 | case Parameters::TARGET_32_LITTLE: |
| 2990 | { |
| 2991 | Sized_incremental_binary<32, false>* sized_ibase = |
| 2992 | static_cast<Sized_incremental_binary<32, false>*>(ibase); |
| 2993 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) |
| 2994 | obj = new Sized_incr_dynobj<32, false>(name, sized_ibase, |
| 2995 | input_file_index); |
| 2996 | else |
| 2997 | obj = new Sized_relobj_incr<32, false>(name, sized_ibase, |
| 2998 | input_file_index); |
| 2999 | } |
| 3000 | break; |
| 3001 | #endif |
| 3002 | #ifdef HAVE_TARGET_32_BIG |
| 3003 | case Parameters::TARGET_32_BIG: |
| 3004 | { |
| 3005 | Sized_incremental_binary<32, true>* sized_ibase = |
| 3006 | static_cast<Sized_incremental_binary<32, true>*>(ibase); |
| 3007 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) |
| 3008 | obj = new Sized_incr_dynobj<32, true>(name, sized_ibase, |
| 3009 | input_file_index); |
| 3010 | else |
| 3011 | obj = new Sized_relobj_incr<32, true>(name, sized_ibase, |
| 3012 | input_file_index); |
| 3013 | } |
| 3014 | break; |
| 3015 | #endif |
| 3016 | #ifdef HAVE_TARGET_64_LITTLE |
| 3017 | case Parameters::TARGET_64_LITTLE: |
| 3018 | { |
| 3019 | Sized_incremental_binary<64, false>* sized_ibase = |
| 3020 | static_cast<Sized_incremental_binary<64, false>*>(ibase); |
| 3021 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) |
| 3022 | obj = new Sized_incr_dynobj<64, false>(name, sized_ibase, |
| 3023 | input_file_index); |
| 3024 | else |
| 3025 | obj = new Sized_relobj_incr<64, false>(name, sized_ibase, |
| 3026 | input_file_index); |
| 3027 | } |
| 3028 | break; |
| 3029 | #endif |
| 3030 | #ifdef HAVE_TARGET_64_BIG |
| 3031 | case Parameters::TARGET_64_BIG: |
| 3032 | { |
| 3033 | Sized_incremental_binary<64, true>* sized_ibase = |
| 3034 | static_cast<Sized_incremental_binary<64, true>*>(ibase); |
| 3035 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) |
| 3036 | obj = new Sized_incr_dynobj<64, true>(name, sized_ibase, |
| 3037 | input_file_index); |
| 3038 | else |
| 3039 | obj = new Sized_relobj_incr<64, true>(name, sized_ibase, |
| 3040 | input_file_index); |
| 3041 | } |
| 3042 | break; |
| 3043 | #endif |
| 3044 | default: |
| 3045 | gold_unreachable(); |
| 3046 | } |
| 3047 | |
| 3048 | gold_assert(obj != NULL); |
| 3049 | return obj; |
| 3050 | } |
| 3051 | |
| 3052 | // Copy the unused symbols from the incremental input info. |
| 3053 | // We need to do this because we may be overwriting the incremental |
| 3054 | // input info in the base file before we write the new incremental |
| 3055 | // info. |
| 3056 | void |
| 3057 | Incremental_library::copy_unused_symbols() |
| 3058 | { |
| 3059 | unsigned int symcount = this->input_reader_->get_unused_symbol_count(); |
| 3060 | this->unused_symbols_.reserve(symcount); |
| 3061 | for (unsigned int i = 0; i < symcount; ++i) |
| 3062 | { |
| 3063 | std::string name(this->input_reader_->get_unused_symbol(i)); |
| 3064 | this->unused_symbols_.push_back(name); |
| 3065 | } |
| 3066 | } |
| 3067 | |
| 3068 | // Iterator for unused global symbols in the library. |
| 3069 | void |
| 3070 | Incremental_library::do_for_all_unused_symbols(Symbol_visitor_base* v) const |
| 3071 | { |
| 3072 | for (Symbol_list::const_iterator p = this->unused_symbols_.begin(); |
| 3073 | p != this->unused_symbols_.end(); |
| 3074 | ++p) |
| 3075 | v->visit(p->c_str()); |
| 3076 | } |
| 3077 | |
| 3078 | // Instantiate the templates we need. |
| 3079 | |
| 3080 | #ifdef HAVE_TARGET_32_LITTLE |
| 3081 | template |
| 3082 | class Sized_incremental_binary<32, false>; |
| 3083 | |
| 3084 | template |
| 3085 | class Sized_relobj_incr<32, false>; |
| 3086 | |
| 3087 | template |
| 3088 | class Sized_incr_dynobj<32, false>; |
| 3089 | #endif |
| 3090 | |
| 3091 | #ifdef HAVE_TARGET_32_BIG |
| 3092 | template |
| 3093 | class Sized_incremental_binary<32, true>; |
| 3094 | |
| 3095 | template |
| 3096 | class Sized_relobj_incr<32, true>; |
| 3097 | |
| 3098 | template |
| 3099 | class Sized_incr_dynobj<32, true>; |
| 3100 | #endif |
| 3101 | |
| 3102 | #ifdef HAVE_TARGET_64_LITTLE |
| 3103 | template |
| 3104 | class Sized_incremental_binary<64, false>; |
| 3105 | |
| 3106 | template |
| 3107 | class Sized_relobj_incr<64, false>; |
| 3108 | |
| 3109 | template |
| 3110 | class Sized_incr_dynobj<64, false>; |
| 3111 | #endif |
| 3112 | |
| 3113 | #ifdef HAVE_TARGET_64_BIG |
| 3114 | template |
| 3115 | class Sized_incremental_binary<64, true>; |
| 3116 | |
| 3117 | template |
| 3118 | class Sized_relobj_incr<64, true>; |
| 3119 | |
| 3120 | template |
| 3121 | class Sized_incr_dynobj<64, true>; |
| 3122 | #endif |
| 3123 | |
| 3124 | } // End namespace gold. |