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0e879927 ILT |
1 | // inremental.cc -- incremental linking support for gold |
2 | ||
b90efa5b | 3 | // Copyright (C) 2009-2015 Free Software Foundation, Inc. |
0e879927 ILT |
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" | |
c549a694 | 24 | |
26d3c67d | 25 | #include <set> |
c549a694 | 26 | #include <cstdarg> |
a81ee015 | 27 | #include "libiberty.h" |
c549a694 | 28 | |
0e879927 | 29 | #include "elfcpp.h" |
cdc29364 | 30 | #include "options.h" |
3ce2c28e | 31 | #include "output.h" |
09ec0418 | 32 | #include "symtab.h" |
3ce2c28e | 33 | #include "incremental.h" |
98fa85cb | 34 | #include "archive.h" |
cdc29364 | 35 | #include "object.h" |
c549a694 | 36 | #include "target-select.h" |
0e70b911 | 37 | #include "target.h" |
cdc29364 CC |
38 | #include "fileread.h" |
39 | #include "script.h" | |
0e879927 | 40 | |
0e879927 ILT |
41 | namespace gold { |
42 | ||
f038d496 CC |
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; | |
0e879927 | 47 | |
09ec0418 CC |
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: | |
cdc29364 CC |
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 | ||
09ec0418 CC |
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 | ||
0e70b911 CC |
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 | ||
09ec0418 CC |
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; | |
f038d496 CC |
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; | |
09ec0418 CC |
127 | |
128 | // The Incremental_inputs object. | |
129 | const Incremental_inputs* inputs_; | |
130 | ||
131 | // The symbol table. | |
132 | const Symbol_table* symtab_; | |
133 | }; | |
134 | ||
c549a694 ILT |
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: " | |
2e702c99 | 145 | "cannot perform incremental link: %s"), buf); |
c549a694 ILT |
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 | ||
0c9350c8 | 174 | // Return TRUE if a section of type SH_TYPE can be updated in place |
aa06ae28 CC |
175 | // during an incremental update. We can update sections of type PROGBITS, |
176 | // NOBITS, INIT_ARRAY, FINI_ARRAY, PREINIT_ARRAY, and NOTE. All others | |
177 | // 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 | } | |
189 | ||
09ec0418 CC |
190 | // Find the .gnu_incremental_inputs section and related sections. |
191 | ||
c549a694 ILT |
192 | template<int size, bool big_endian> |
193 | bool | |
b961d0d7 | 194 | Sized_incremental_binary<size, big_endian>::find_incremental_inputs_sections( |
09ec0418 CC |
195 | unsigned int* p_inputs_shndx, |
196 | unsigned int* p_symtab_shndx, | |
197 | unsigned int* p_relocs_shndx, | |
0e70b911 | 198 | unsigned int* p_got_plt_shndx, |
09ec0418 | 199 | unsigned int* p_strtab_shndx) |
c549a694 | 200 | { |
09ec0418 CC |
201 | unsigned int inputs_shndx = |
202 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_INPUTS); | |
203 | if (inputs_shndx == elfcpp::SHN_UNDEF) // Not found. | |
204 | return false; | |
205 | ||
206 | unsigned int symtab_shndx = | |
207 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_SYMTAB); | |
208 | if (symtab_shndx == elfcpp::SHN_UNDEF) // Not found. | |
209 | return false; | |
210 | if (this->elf_file_.section_link(symtab_shndx) != inputs_shndx) | |
c549a694 | 211 | return false; |
09ec0418 CC |
212 | |
213 | unsigned int relocs_shndx = | |
214 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_RELOCS); | |
215 | if (relocs_shndx == elfcpp::SHN_UNDEF) // Not found. | |
216 | return false; | |
217 | if (this->elf_file_.section_link(relocs_shndx) != inputs_shndx) | |
218 | return false; | |
219 | ||
0e70b911 CC |
220 | unsigned int got_plt_shndx = |
221 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_GOT_PLT); | |
222 | if (got_plt_shndx == elfcpp::SHN_UNDEF) // Not found. | |
223 | return false; | |
224 | if (this->elf_file_.section_link(got_plt_shndx) != inputs_shndx) | |
225 | return false; | |
226 | ||
09ec0418 CC |
227 | unsigned int strtab_shndx = this->elf_file_.section_link(inputs_shndx); |
228 | if (strtab_shndx == elfcpp::SHN_UNDEF | |
229 | || strtab_shndx > this->elf_file_.shnum() | |
230 | || this->elf_file_.section_type(strtab_shndx) != elfcpp::SHT_STRTAB) | |
231 | return false; | |
232 | ||
233 | if (p_inputs_shndx != NULL) | |
234 | *p_inputs_shndx = inputs_shndx; | |
235 | if (p_symtab_shndx != NULL) | |
236 | *p_symtab_shndx = symtab_shndx; | |
237 | if (p_relocs_shndx != NULL) | |
238 | *p_relocs_shndx = relocs_shndx; | |
0e70b911 CC |
239 | if (p_got_plt_shndx != NULL) |
240 | *p_got_plt_shndx = got_plt_shndx; | |
09ec0418 CC |
241 | if (p_strtab_shndx != NULL) |
242 | *p_strtab_shndx = strtab_shndx; | |
c549a694 ILT |
243 | return true; |
244 | } | |
245 | ||
b961d0d7 | 246 | // Set up the readers into the incremental info sections. |
09ec0418 | 247 | |
c4aa1e2d | 248 | template<int size, bool big_endian> |
b961d0d7 CC |
249 | void |
250 | Sized_incremental_binary<size, big_endian>::setup_readers() | |
c4aa1e2d | 251 | { |
09ec0418 CC |
252 | unsigned int inputs_shndx; |
253 | unsigned int symtab_shndx; | |
254 | unsigned int relocs_shndx; | |
b961d0d7 | 255 | unsigned int got_plt_shndx; |
c4aa1e2d | 256 | unsigned int strtab_shndx; |
c4aa1e2d | 257 | |
b961d0d7 CC |
258 | if (!this->find_incremental_inputs_sections(&inputs_shndx, &symtab_shndx, |
259 | &relocs_shndx, &got_plt_shndx, | |
260 | &strtab_shndx)) | |
261 | return; | |
c4aa1e2d | 262 | |
09ec0418 CC |
263 | Location inputs_location(this->elf_file_.section_contents(inputs_shndx)); |
264 | Location symtab_location(this->elf_file_.section_contents(symtab_shndx)); | |
265 | Location relocs_location(this->elf_file_.section_contents(relocs_shndx)); | |
b961d0d7 | 266 | Location got_plt_location(this->elf_file_.section_contents(got_plt_shndx)); |
c4aa1e2d | 267 | Location strtab_location(this->elf_file_.section_contents(strtab_shndx)); |
09ec0418 | 268 | |
b961d0d7 CC |
269 | View inputs_view = this->view(inputs_location); |
270 | View symtab_view = this->view(symtab_location); | |
271 | View relocs_view = this->view(relocs_location); | |
272 | View got_plt_view = this->view(got_plt_location); | |
273 | View strtab_view = this->view(strtab_location); | |
09ec0418 | 274 | |
c4aa1e2d | 275 | elfcpp::Elf_strtab strtab(strtab_view.data(), strtab_location.data_size); |
c4aa1e2d | 276 | |
b961d0d7 CC |
277 | this->inputs_reader_ = |
278 | Incremental_inputs_reader<size, big_endian>(inputs_view.data(), strtab); | |
279 | this->symtab_reader_ = | |
280 | Incremental_symtab_reader<big_endian>(symtab_view.data(), | |
281 | symtab_location.data_size); | |
282 | this->relocs_reader_ = | |
283 | Incremental_relocs_reader<size, big_endian>(relocs_view.data(), | |
284 | relocs_location.data_size); | |
285 | this->got_plt_reader_ = | |
286 | Incremental_got_plt_reader<big_endian>(got_plt_view.data()); | |
cdc29364 | 287 | |
4829d394 CC |
288 | // Find the main symbol table. |
289 | unsigned int main_symtab_shndx = | |
290 | this->elf_file_.find_section_by_type(elfcpp::SHT_SYMTAB); | |
291 | gold_assert(main_symtab_shndx != elfcpp::SHN_UNDEF); | |
292 | this->main_symtab_loc_ = this->elf_file_.section_contents(main_symtab_shndx); | |
293 | ||
294 | // Find the main symbol string table. | |
295 | unsigned int main_strtab_shndx = | |
296 | this->elf_file_.section_link(main_symtab_shndx); | |
297 | gold_assert(main_strtab_shndx != elfcpp::SHN_UNDEF | |
2e702c99 | 298 | && main_strtab_shndx < this->elf_file_.shnum()); |
4829d394 CC |
299 | this->main_strtab_loc_ = this->elf_file_.section_contents(main_strtab_shndx); |
300 | ||
cdc29364 CC |
301 | // Walk the list of input files (a) to setup an Input_reader for each |
302 | // input file, and (b) to record maps of files added from archive | |
303 | // libraries and scripts. | |
304 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; | |
305 | unsigned int count = inputs.input_file_count(); | |
6fa2a40b | 306 | this->input_objects_.resize(count); |
cdc29364 CC |
307 | this->input_entry_readers_.reserve(count); |
308 | this->library_map_.resize(count); | |
309 | this->script_map_.resize(count); | |
310 | for (unsigned int i = 0; i < count; i++) | |
311 | { | |
312 | Input_entry_reader input_file = inputs.input_file(i); | |
313 | this->input_entry_readers_.push_back(Sized_input_reader(input_file)); | |
314 | switch (input_file.type()) | |
315 | { | |
316 | case INCREMENTAL_INPUT_OBJECT: | |
317 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
318 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
319 | // No special treatment necessary. | |
320 | break; | |
321 | case INCREMENTAL_INPUT_ARCHIVE: | |
322 | { | |
323 | Incremental_library* lib = | |
2e702c99 | 324 | new Incremental_library(input_file.filename(), i, |
cdc29364 CC |
325 | &this->input_entry_readers_[i]); |
326 | this->library_map_[i] = lib; | |
327 | unsigned int member_count = input_file.get_member_count(); | |
328 | for (unsigned int j = 0; j < member_count; j++) | |
329 | { | |
330 | int member_offset = input_file.get_member_offset(j); | |
331 | int member_index = inputs.input_file_index(member_offset); | |
332 | this->library_map_[member_index] = lib; | |
333 | } | |
334 | } | |
335 | break; | |
336 | case INCREMENTAL_INPUT_SCRIPT: | |
337 | { | |
e24719f6 | 338 | Script_info* script = new Script_info(input_file.filename(), i); |
cdc29364 CC |
339 | this->script_map_[i] = script; |
340 | unsigned int object_count = input_file.get_object_count(); | |
341 | for (unsigned int j = 0; j < object_count; j++) | |
342 | { | |
343 | int object_offset = input_file.get_object_offset(j); | |
344 | int object_index = inputs.input_file_index(object_offset); | |
345 | this->script_map_[object_index] = script; | |
346 | } | |
347 | } | |
348 | break; | |
349 | default: | |
350 | gold_unreachable(); | |
351 | } | |
352 | } | |
353 | ||
94a3fc8b CC |
354 | // Initialize the map of global symbols. |
355 | unsigned int nglobals = this->symtab_reader_.symbol_count(); | |
356 | this->symbol_map_.resize(nglobals); | |
357 | ||
b961d0d7 CC |
358 | this->has_incremental_info_ = true; |
359 | } | |
360 | ||
cdc29364 CC |
361 | // Walk the list of input files given on the command line, and build |
362 | // a direct map of file index to the corresponding input argument. | |
363 | ||
364 | void | |
365 | check_input_args(std::vector<const Input_argument*>& input_args_map, | |
366 | Input_arguments::const_iterator begin, | |
367 | Input_arguments::const_iterator end) | |
368 | { | |
369 | for (Input_arguments::const_iterator p = begin; | |
370 | p != end; | |
371 | ++p) | |
372 | { | |
373 | if (p->is_group()) | |
374 | { | |
375 | const Input_file_group* group = p->group(); | |
376 | check_input_args(input_args_map, group->begin(), group->end()); | |
377 | } | |
378 | else if (p->is_lib()) | |
379 | { | |
380 | const Input_file_lib* lib = p->lib(); | |
381 | check_input_args(input_args_map, lib->begin(), lib->end()); | |
382 | } | |
383 | else | |
2e702c99 RM |
384 | { |
385 | gold_assert(p->is_file()); | |
386 | unsigned int arg_serial = p->file().arg_serial(); | |
387 | if (arg_serial > 0) | |
cdc29364 CC |
388 | { |
389 | gold_assert(arg_serial <= input_args_map.size()); | |
390 | gold_assert(input_args_map[arg_serial - 1] == 0); | |
391 | input_args_map[arg_serial - 1] = &*p; | |
392 | } | |
2e702c99 | 393 | } |
cdc29364 CC |
394 | } |
395 | } | |
396 | ||
b961d0d7 CC |
397 | // Determine whether an incremental link based on the existing output file |
398 | // can be done. | |
399 | ||
400 | template<int size, bool big_endian> | |
401 | bool | |
402 | Sized_incremental_binary<size, big_endian>::do_check_inputs( | |
cdc29364 | 403 | const Command_line& cmdline, |
b961d0d7 CC |
404 | Incremental_inputs* incremental_inputs) |
405 | { | |
cdc29364 CC |
406 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; |
407 | ||
b961d0d7 CC |
408 | if (!this->has_incremental_info_) |
409 | { | |
410 | explain_no_incremental(_("no incremental data from previous build")); | |
411 | return false; | |
412 | } | |
c4aa1e2d | 413 | |
cdc29364 | 414 | if (inputs.version() != INCREMENTAL_LINK_VERSION) |
c4aa1e2d | 415 | { |
09ec0418 | 416 | explain_no_incremental(_("different version of incremental build data")); |
c4aa1e2d ILT |
417 | return false; |
418 | } | |
419 | ||
cdc29364 | 420 | if (incremental_inputs->command_line() != inputs.command_line()) |
c4aa1e2d | 421 | { |
8f7c81e8 | 422 | gold_debug(DEBUG_INCREMENTAL, |
2e702c99 RM |
423 | "old command line: %s", |
424 | inputs.command_line()); | |
8f7c81e8 | 425 | gold_debug(DEBUG_INCREMENTAL, |
2e702c99 RM |
426 | "new command line: %s", |
427 | incremental_inputs->command_line().c_str()); | |
c4aa1e2d ILT |
428 | explain_no_incremental(_("command line changed")); |
429 | return false; | |
430 | } | |
431 | ||
cdc29364 CC |
432 | // Walk the list of input files given on the command line, and build |
433 | // a direct map of argument serial numbers to the corresponding input | |
434 | // arguments. | |
435 | this->input_args_map_.resize(cmdline.number_of_input_files()); | |
436 | check_input_args(this->input_args_map_, cmdline.begin(), cmdline.end()); | |
437 | ||
438 | // Walk the list of input files to check for conditions that prevent | |
439 | // an incremental update link. | |
440 | unsigned int count = inputs.input_file_count(); | |
441 | for (unsigned int i = 0; i < count; i++) | |
442 | { | |
443 | Input_entry_reader input_file = inputs.input_file(i); | |
444 | switch (input_file.type()) | |
445 | { | |
446 | case INCREMENTAL_INPUT_OBJECT: | |
447 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
448 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
449 | case INCREMENTAL_INPUT_ARCHIVE: | |
450 | // No special treatment necessary. | |
451 | break; | |
452 | case INCREMENTAL_INPUT_SCRIPT: | |
453 | if (this->do_file_has_changed(i)) | |
454 | { | |
455 | explain_no_incremental(_("%s: script file changed"), | |
456 | input_file.filename()); | |
457 | return false; | |
458 | } | |
459 | break; | |
460 | default: | |
461 | gold_unreachable(); | |
462 | } | |
463 | } | |
464 | ||
c4aa1e2d ILT |
465 | return true; |
466 | } | |
467 | ||
cdc29364 | 468 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 CC |
469 | |
470 | template<int size, bool big_endian> | |
471 | bool | |
cdc29364 CC |
472 | Sized_incremental_binary<size, big_endian>::do_file_has_changed( |
473 | unsigned int n) const | |
b961d0d7 | 474 | { |
cdc29364 CC |
475 | Input_entry_reader input_file = this->inputs_reader_.input_file(n); |
476 | Incremental_disposition disp = INCREMENTAL_CHECK; | |
e24719f6 CC |
477 | |
478 | // For files named in scripts, find the file that was actually named | |
479 | // on the command line, so that we can get the incremental disposition | |
480 | // flag. | |
481 | Script_info* script = this->get_script_info(n); | |
482 | if (script != NULL) | |
483 | n = script->input_file_index(); | |
484 | ||
cdc29364 CC |
485 | const Input_argument* input_argument = this->get_input_argument(n); |
486 | if (input_argument != NULL) | |
487 | disp = input_argument->file().options().incremental_disposition(); | |
b961d0d7 | 488 | |
221597a5 CC |
489 | // For files at the beginning of the command line (i.e., those added |
490 | // implicitly by gcc), check whether the --incremental-startup-unchanged | |
491 | // option was used. | |
492 | if (disp == INCREMENTAL_STARTUP) | |
493 | disp = parameters->options().incremental_startup_disposition(); | |
494 | ||
b961d0d7 | 495 | if (disp != INCREMENTAL_CHECK) |
cdc29364 | 496 | return disp == INCREMENTAL_CHANGED; |
b961d0d7 | 497 | |
cdc29364 CC |
498 | const char* filename = input_file.filename(); |
499 | Timespec old_mtime = input_file.get_mtime(); | |
500 | Timespec new_mtime; | |
501 | if (!get_mtime(filename, &new_mtime)) | |
502 | { | |
503 | // If we can't open get the current modification time, assume it has | |
504 | // changed. If the file doesn't exist, we'll issue an error when we | |
505 | // try to open it later. | |
506 | return true; | |
507 | } | |
508 | ||
509 | if (new_mtime.seconds > old_mtime.seconds) | |
510 | return true; | |
511 | if (new_mtime.seconds == old_mtime.seconds | |
512 | && new_mtime.nanoseconds > old_mtime.nanoseconds) | |
513 | return true; | |
b961d0d7 CC |
514 | return false; |
515 | } | |
516 | ||
cdc29364 CC |
517 | // Initialize the layout of the output file based on the existing |
518 | // output file. | |
519 | ||
520 | template<int size, bool big_endian> | |
521 | void | |
522 | Sized_incremental_binary<size, big_endian>::do_init_layout(Layout* layout) | |
523 | { | |
524 | typedef elfcpp::Shdr<size, big_endian> Shdr; | |
525 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
526 | ||
527 | // Get views of the section headers and the section string table. | |
528 | const off_t shoff = this->elf_file_.shoff(); | |
529 | const unsigned int shnum = this->elf_file_.shnum(); | |
530 | const unsigned int shstrndx = this->elf_file_.shstrndx(); | |
531 | Location shdrs_location(shoff, shnum * shdr_size); | |
532 | Location shstrndx_location(this->elf_file_.section_contents(shstrndx)); | |
533 | View shdrs_view = this->view(shdrs_location); | |
534 | View shstrndx_view = this->view(shstrndx_location); | |
535 | elfcpp::Elf_strtab shstrtab(shstrndx_view.data(), | |
536 | shstrndx_location.data_size); | |
537 | ||
538 | layout->set_incremental_base(this); | |
539 | ||
540 | // Initialize the layout. | |
541 | this->section_map_.resize(shnum); | |
542 | const unsigned char* pshdr = shdrs_view.data() + shdr_size; | |
543 | for (unsigned int i = 1; i < shnum; i++) | |
544 | { | |
545 | Shdr shdr(pshdr); | |
546 | const char* name; | |
547 | if (!shstrtab.get_c_string(shdr.get_sh_name(), &name)) | |
2e702c99 | 548 | name = NULL; |
cdc29364 CC |
549 | gold_debug(DEBUG_INCREMENTAL, |
550 | "Output section: %2d %08lx %08lx %08lx %3d %s", | |
2e702c99 RM |
551 | i, |
552 | static_cast<long>(shdr.get_sh_addr()), | |
553 | static_cast<long>(shdr.get_sh_offset()), | |
554 | static_cast<long>(shdr.get_sh_size()), | |
555 | shdr.get_sh_type(), name ? name : "<null>"); | |
cdc29364 CC |
556 | this->section_map_[i] = layout->init_fixed_output_section(name, shdr); |
557 | pshdr += shdr_size; | |
558 | } | |
559 | } | |
560 | ||
561 | // Mark regions of the input file that must be kept unchanged. | |
562 | ||
563 | template<int size, bool big_endian> | |
564 | void | |
565 | Sized_incremental_binary<size, big_endian>::do_reserve_layout( | |
566 | unsigned int input_file_index) | |
567 | { | |
26d3c67d CC |
568 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
569 | ||
cdc29364 CC |
570 | Input_entry_reader input_file = |
571 | this->inputs_reader_.input_file(input_file_index); | |
572 | ||
573 | if (input_file.type() == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
26d3c67d CC |
574 | { |
575 | // Reserve the BSS space used for COPY relocations. | |
576 | unsigned int nsyms = input_file.get_global_symbol_count(); | |
577 | Incremental_binary::View symtab_view(NULL); | |
578 | unsigned int symtab_count; | |
579 | elfcpp::Elf_strtab strtab(NULL, 0); | |
580 | this->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
581 | for (unsigned int i = 0; i < nsyms; ++i) | |
582 | { | |
583 | bool is_def; | |
584 | bool is_copy; | |
2e702c99 | 585 | unsigned int output_symndx = |
26d3c67d CC |
586 | input_file.get_output_symbol_index(i, &is_def, &is_copy); |
587 | if (is_copy) | |
588 | { | |
589 | const unsigned char* sym_p = (symtab_view.data() | |
590 | + output_symndx * sym_size); | |
591 | elfcpp::Sym<size, big_endian> gsym(sym_p); | |
592 | unsigned int shndx = gsym.get_st_shndx(); | |
593 | if (shndx < 1 || shndx >= this->section_map_.size()) | |
2e702c99 | 594 | continue; |
26d3c67d CC |
595 | Output_section* os = this->section_map_[shndx]; |
596 | off_t offset = gsym.get_st_value() - os->address(); | |
597 | os->reserve(offset, gsym.get_st_size()); | |
598 | gold_debug(DEBUG_INCREMENTAL, | |
599 | "Reserve for COPY reloc: %s, off %d, size %d", | |
600 | os->name(), | |
601 | static_cast<int>(offset), | |
602 | static_cast<int>(gsym.get_st_size())); | |
603 | } | |
604 | } | |
605 | return; | |
606 | } | |
cdc29364 CC |
607 | |
608 | unsigned int shnum = input_file.get_input_section_count(); | |
609 | for (unsigned int i = 0; i < shnum; i++) | |
610 | { | |
611 | typename Input_entry_reader::Input_section_info sect = | |
2e702c99 | 612 | input_file.get_input_section(i); |
cdc29364 | 613 | if (sect.output_shndx == 0 || sect.sh_offset == -1) |
2e702c99 | 614 | continue; |
cdc29364 CC |
615 | Output_section* os = this->section_map_[sect.output_shndx]; |
616 | gold_assert(os != NULL); | |
617 | os->reserve(sect.sh_offset, sect.sh_size); | |
618 | } | |
619 | } | |
620 | ||
4829d394 CC |
621 | // Process the GOT and PLT entries from the existing output file. |
622 | ||
623 | template<int size, bool big_endian> | |
624 | void | |
625 | Sized_incremental_binary<size, big_endian>::do_process_got_plt( | |
626 | Symbol_table* symtab, | |
627 | Layout* layout) | |
628 | { | |
629 | Incremental_got_plt_reader<big_endian> got_plt_reader(this->got_plt_reader()); | |
630 | Sized_target<size, big_endian>* target = | |
631 | parameters->sized_target<size, big_endian>(); | |
632 | ||
633 | // Get the number of symbols in the main symbol table and in the | |
634 | // incremental symbol table. The difference between the two counts | |
635 | // is the index of the first forced-local or global symbol in the | |
636 | // main symbol table. | |
637 | unsigned int symtab_count = | |
638 | this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; | |
639 | unsigned int isym_count = this->symtab_reader_.symbol_count(); | |
640 | unsigned int first_global = symtab_count - isym_count; | |
641 | ||
642 | // Tell the target how big the GOT and PLT sections are. | |
643 | unsigned int got_count = got_plt_reader.get_got_entry_count(); | |
644 | unsigned int plt_count = got_plt_reader.get_plt_entry_count(); | |
dd74ae06 | 645 | Output_data_got_base* got = |
4829d394 CC |
646 | target->init_got_plt_for_update(symtab, layout, got_count, plt_count); |
647 | ||
648 | // Read the GOT entries from the base file and build the outgoing GOT. | |
649 | for (unsigned int i = 0; i < got_count; ++i) | |
650 | { | |
651 | unsigned int got_type = got_plt_reader.get_got_type(i); | |
652 | if ((got_type & 0x7f) == 0x7f) | |
653 | { | |
654 | // This is the second entry of a pair. | |
655 | got->reserve_slot(i); | |
656 | continue; | |
657 | } | |
6fa2a40b | 658 | unsigned int symndx = got_plt_reader.get_got_symndx(i); |
4829d394 CC |
659 | if (got_type & 0x80) |
660 | { | |
6fa2a40b CC |
661 | // This is an entry for a local symbol. Ignore this entry if |
662 | // the object file was replaced. | |
663 | unsigned int input_index = got_plt_reader.get_got_input_index(i); | |
4829d394 CC |
664 | gold_debug(DEBUG_INCREMENTAL, |
665 | "GOT entry %d, type %02x: (local symbol)", | |
666 | i, got_type & 0x7f); | |
6fa2a40b CC |
667 | Sized_relobj_incr<size, big_endian>* obj = |
668 | this->input_object(input_index); | |
669 | if (obj != NULL) | |
670 | target->reserve_local_got_entry(i, obj, symndx, got_type & 0x7f); | |
4829d394 CC |
671 | } |
672 | else | |
673 | { | |
674 | // This is an entry for a global symbol. GOT_DESC is the symbol | |
675 | // table index. | |
676 | // FIXME: This should really be a fatal error (corrupt input). | |
6fa2a40b CC |
677 | gold_assert(symndx >= first_global && symndx < symtab_count); |
678 | Symbol* sym = this->global_symbol(symndx - first_global); | |
5146f448 CC |
679 | // Add the GOT entry only if the symbol is still referenced. |
680 | if (sym != NULL && sym->in_reg()) | |
681 | { | |
682 | gold_debug(DEBUG_INCREMENTAL, | |
683 | "GOT entry %d, type %02x: %s", | |
684 | i, got_type, sym->name()); | |
685 | target->reserve_global_got_entry(i, sym, got_type); | |
686 | } | |
4829d394 CC |
687 | } |
688 | } | |
689 | ||
690 | // Read the PLT entries from the base file and pass each to the target. | |
691 | for (unsigned int i = 0; i < plt_count; ++i) | |
692 | { | |
693 | unsigned int plt_desc = got_plt_reader.get_plt_desc(i); | |
694 | // FIXME: This should really be a fatal error (corrupt input). | |
695 | gold_assert(plt_desc >= first_global && plt_desc < symtab_count); | |
696 | Symbol* sym = this->global_symbol(plt_desc - first_global); | |
5146f448 | 697 | // Add the PLT entry only if the symbol is still referenced. |
a7dac153 | 698 | if (sym != NULL && sym->in_reg()) |
5146f448 CC |
699 | { |
700 | gold_debug(DEBUG_INCREMENTAL, | |
701 | "PLT entry %d: %s", | |
702 | i, sym->name()); | |
67181c72 | 703 | target->register_global_plt_entry(symtab, layout, i, sym); |
5146f448 | 704 | } |
4829d394 CC |
705 | } |
706 | } | |
707 | ||
26d3c67d CC |
708 | // Emit COPY relocations from the existing output file. |
709 | ||
710 | template<int size, bool big_endian> | |
711 | void | |
712 | Sized_incremental_binary<size, big_endian>::do_emit_copy_relocs( | |
713 | Symbol_table* symtab) | |
714 | { | |
715 | Sized_target<size, big_endian>* target = | |
716 | parameters->sized_target<size, big_endian>(); | |
717 | ||
718 | for (typename Copy_relocs::iterator p = this->copy_relocs_.begin(); | |
719 | p != this->copy_relocs_.end(); | |
720 | ++p) | |
721 | { | |
722 | if (!(*p).symbol->is_copied_from_dynobj()) | |
723 | target->emit_copy_reloc(symtab, (*p).symbol, (*p).output_section, | |
724 | (*p).offset); | |
725 | } | |
726 | } | |
727 | ||
94a3fc8b CC |
728 | // Apply incremental relocations for symbols whose values have changed. |
729 | ||
730 | template<int size, bool big_endian> | |
731 | void | |
732 | Sized_incremental_binary<size, big_endian>::do_apply_incremental_relocs( | |
733 | const Symbol_table* symtab, | |
734 | Layout* layout, | |
735 | Output_file* of) | |
736 | { | |
737 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
738 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
739 | Incremental_symtab_reader<big_endian> isymtab(this->symtab_reader()); | |
740 | Incremental_relocs_reader<size, big_endian> irelocs(this->relocs_reader()); | |
741 | unsigned int nglobals = isymtab.symbol_count(); | |
742 | const unsigned int incr_reloc_size = irelocs.reloc_size; | |
743 | ||
744 | Relocate_info<size, big_endian> relinfo; | |
745 | relinfo.symtab = symtab; | |
746 | relinfo.layout = layout; | |
747 | relinfo.object = NULL; | |
748 | relinfo.reloc_shndx = 0; | |
749 | relinfo.reloc_shdr = NULL; | |
750 | relinfo.data_shndx = 0; | |
751 | relinfo.data_shdr = NULL; | |
752 | ||
753 | Sized_target<size, big_endian>* target = | |
754 | parameters->sized_target<size, big_endian>(); | |
755 | ||
756 | for (unsigned int i = 0; i < nglobals; i++) | |
757 | { | |
758 | const Symbol* gsym = this->global_symbol(i); | |
759 | ||
760 | // If the symbol is not referenced from any unchanged input files, | |
761 | // we do not need to reapply any of its relocations. | |
762 | if (gsym == NULL) | |
763 | continue; | |
764 | ||
765 | // If the symbol is defined in an unchanged file, we do not need to | |
766 | // reapply any of its relocations. | |
767 | if (gsym->source() == Symbol::FROM_OBJECT | |
768 | && gsym->object()->is_incremental()) | |
769 | continue; | |
770 | ||
771 | gold_debug(DEBUG_INCREMENTAL, | |
772 | "Applying incremental relocations for global symbol %s [%d]", | |
773 | gsym->name(), i); | |
774 | ||
775 | // Follow the linked list of input symbol table entries for this symbol. | |
776 | // We don't bother to figure out whether the symbol table entry belongs | |
777 | // to a changed or unchanged file because it's easier just to apply all | |
778 | // the relocations -- although we might scribble over an area that has | |
779 | // been reallocated, we do this before copying any new data into the | |
780 | // output file. | |
781 | unsigned int offset = isymtab.get_list_head(i); | |
782 | while (offset > 0) | |
2e702c99 | 783 | { |
94a3fc8b CC |
784 | Incremental_global_symbol_reader<big_endian> sym_info = |
785 | this->inputs_reader().global_symbol_reader_at_offset(offset); | |
786 | unsigned int r_base = sym_info.reloc_offset(); | |
787 | unsigned int r_count = sym_info.reloc_count(); | |
788 | ||
789 | // Apply each relocation for this symbol table entry. | |
790 | for (unsigned int j = 0; j < r_count; | |
791 | ++j, r_base += incr_reloc_size) | |
792 | { | |
793 | unsigned int r_type = irelocs.get_r_type(r_base); | |
794 | unsigned int r_shndx = irelocs.get_r_shndx(r_base); | |
795 | Address r_offset = irelocs.get_r_offset(r_base); | |
796 | Addend r_addend = irelocs.get_r_addend(r_base); | |
797 | Output_section* os = this->output_section(r_shndx); | |
798 | Address address = os->address(); | |
799 | off_t section_offset = os->offset(); | |
800 | size_t view_size = os->data_size(); | |
801 | unsigned char* const view = of->get_output_view(section_offset, | |
802 | view_size); | |
803 | ||
804 | gold_debug(DEBUG_INCREMENTAL, | |
2e702c99 RM |
805 | " %08lx: %s + %d: type %d addend %ld", |
806 | (long)(section_offset + r_offset), | |
807 | os->name(), | |
808 | (int)r_offset, | |
809 | r_type, | |
810 | (long)r_addend); | |
94a3fc8b CC |
811 | |
812 | target->apply_relocation(&relinfo, r_offset, r_type, r_addend, | |
813 | gsym, view, address, view_size); | |
814 | ||
815 | // FIXME: Do something more efficient if write_output_view | |
816 | // ever becomes more than a no-op. | |
817 | of->write_output_view(section_offset, view_size, view); | |
818 | } | |
819 | offset = sym_info.next_offset(); | |
2e702c99 | 820 | } |
94a3fc8b CC |
821 | } |
822 | } | |
823 | ||
cdc29364 | 824 | // Get a view of the main symbol table and the symbol string table. |
b961d0d7 CC |
825 | |
826 | template<int size, bool big_endian> | |
cdc29364 CC |
827 | void |
828 | Sized_incremental_binary<size, big_endian>::get_symtab_view( | |
829 | View* symtab_view, | |
830 | unsigned int* nsyms, | |
831 | elfcpp::Elf_strtab* strtab) | |
b961d0d7 | 832 | { |
4829d394 CC |
833 | *symtab_view = this->view(this->main_symtab_loc_); |
834 | *nsyms = this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; | |
cdc29364 | 835 | |
4829d394 CC |
836 | View strtab_view(this->view(this->main_strtab_loc_)); |
837 | *strtab = elfcpp::Elf_strtab(strtab_view.data(), | |
838 | this->main_strtab_loc_.data_size); | |
b961d0d7 CC |
839 | } |
840 | ||
c549a694 ILT |
841 | namespace |
842 | { | |
843 | ||
844 | // Create a Sized_incremental_binary object of the specified size and | |
845 | // endianness. Fails if the target architecture is not supported. | |
846 | ||
847 | template<int size, bool big_endian> | |
848 | Incremental_binary* | |
849 | make_sized_incremental_binary(Output_file* file, | |
2e702c99 | 850 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
c549a694 | 851 | { |
2e702c99 RM |
852 | Target* target = select_target(NULL, 0, // XXX |
853 | ehdr.get_e_machine(), size, big_endian, | |
854 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
855 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
c549a694 ILT |
856 | if (target == NULL) |
857 | { | |
858 | explain_no_incremental(_("unsupported ELF machine number %d"), | |
2e702c99 | 859 | ehdr.get_e_machine()); |
c549a694 ILT |
860 | return NULL; |
861 | } | |
862 | ||
3aec4f9c RÁE |
863 | if (!parameters->target_valid()) |
864 | set_parameters_target(target); | |
865 | else if (target != ¶meters->target()) | |
866 | gold_error(_("%s: incompatible target"), file->filename()); | |
867 | ||
c549a694 ILT |
868 | return new Sized_incremental_binary<size, big_endian>(file, ehdr, target); |
869 | } | |
870 | ||
871 | } // End of anonymous namespace. | |
872 | ||
09ec0418 CC |
873 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
874 | // possible, e.g. FILE is not an ELF file or has an unsupported target. FILE | |
c549a694 ILT |
875 | // should be opened. |
876 | ||
877 | Incremental_binary* | |
878 | open_incremental_binary(Output_file* file) | |
879 | { | |
880 | off_t filesize = file->filesize(); | |
881 | int want = elfcpp::Elf_recognizer::max_header_size; | |
882 | if (filesize < want) | |
883 | want = filesize; | |
884 | ||
885 | const unsigned char* p = file->get_input_view(0, want); | |
886 | if (!elfcpp::Elf_recognizer::is_elf_file(p, want)) | |
887 | { | |
888 | explain_no_incremental(_("output is not an ELF file.")); | |
889 | return NULL; | |
890 | } | |
891 | ||
ac33a407 DK |
892 | int size = 0; |
893 | bool big_endian = false; | |
c549a694 ILT |
894 | std::string error; |
895 | if (!elfcpp::Elf_recognizer::is_valid_header(p, want, &size, &big_endian, | |
2e702c99 | 896 | &error)) |
c549a694 ILT |
897 | { |
898 | explain_no_incremental(error.c_str()); | |
899 | return NULL; | |
900 | } | |
901 | ||
902 | Incremental_binary* result = NULL; | |
903 | if (size == 32) | |
904 | { | |
905 | if (big_endian) | |
2e702c99 | 906 | { |
c549a694 | 907 | #ifdef HAVE_TARGET_32_BIG |
2e702c99 RM |
908 | result = make_sized_incremental_binary<32, true>( |
909 | file, elfcpp::Ehdr<32, true>(p)); | |
c549a694 | 910 | #else |
2e702c99 | 911 | explain_no_incremental(_("unsupported file: 32-bit, big-endian")); |
c549a694 | 912 | #endif |
2e702c99 | 913 | } |
c549a694 | 914 | else |
2e702c99 | 915 | { |
c549a694 | 916 | #ifdef HAVE_TARGET_32_LITTLE |
2e702c99 RM |
917 | result = make_sized_incremental_binary<32, false>( |
918 | file, elfcpp::Ehdr<32, false>(p)); | |
c549a694 | 919 | #else |
2e702c99 | 920 | explain_no_incremental(_("unsupported file: 32-bit, little-endian")); |
c549a694 | 921 | #endif |
2e702c99 | 922 | } |
c549a694 ILT |
923 | } |
924 | else if (size == 64) | |
925 | { | |
926 | if (big_endian) | |
2e702c99 | 927 | { |
c549a694 | 928 | #ifdef HAVE_TARGET_64_BIG |
2e702c99 RM |
929 | result = make_sized_incremental_binary<64, true>( |
930 | file, elfcpp::Ehdr<64, true>(p)); | |
c549a694 | 931 | #else |
2e702c99 | 932 | explain_no_incremental(_("unsupported file: 64-bit, big-endian")); |
c549a694 | 933 | #endif |
2e702c99 | 934 | } |
c549a694 | 935 | else |
2e702c99 | 936 | { |
c549a694 | 937 | #ifdef HAVE_TARGET_64_LITTLE |
2e702c99 RM |
938 | result = make_sized_incremental_binary<64, false>( |
939 | file, elfcpp::Ehdr<64, false>(p)); | |
c549a694 | 940 | #else |
2e702c99 | 941 | explain_no_incremental(_("unsupported file: 64-bit, little-endian")); |
c549a694 | 942 | #endif |
2e702c99 | 943 | } |
c549a694 ILT |
944 | } |
945 | else | |
946 | gold_unreachable(); | |
947 | ||
948 | return result; | |
949 | } | |
950 | ||
09ec0418 CC |
951 | // Class Incremental_inputs. |
952 | ||
3ce2c28e ILT |
953 | // Add the command line to the string table, setting |
954 | // command_line_key_. In incremental builds, the command line is | |
955 | // stored in .gnu_incremental_inputs so that the next linker run can | |
956 | // check if the command line options didn't change. | |
957 | ||
958 | void | |
959 | Incremental_inputs::report_command_line(int argc, const char* const* argv) | |
960 | { | |
961 | // Always store 'gold' as argv[0] to avoid a full relink if the user used a | |
962 | // different path to the linker. | |
963 | std::string args("gold"); | |
964 | // Copied from collect_argv in main.cc. | |
965 | for (int i = 1; i < argc; ++i) | |
966 | { | |
09ec0418 | 967 | // Adding/removing these options should not result in a full relink. |
8c21d9d3 CC |
968 | if (strcmp(argv[i], "--incremental") == 0 |
969 | || strcmp(argv[i], "--incremental-full") == 0 | |
970 | || strcmp(argv[i], "--incremental-update") == 0 | |
971 | || strcmp(argv[i], "--incremental-changed") == 0 | |
b19b0c6d | 972 | || strcmp(argv[i], "--incremental-unchanged") == 0 |
cdc29364 | 973 | || strcmp(argv[i], "--incremental-unknown") == 0 |
221597a5 | 974 | || strcmp(argv[i], "--incremental-startup-unchanged") == 0 |
aa92d6ed | 975 | || is_prefix_of("--incremental-base=", argv[i]) |
9fbd3822 | 976 | || is_prefix_of("--incremental-patch=", argv[i]) |
cdc29364 | 977 | || is_prefix_of("--debug=", argv[i])) |
2e702c99 | 978 | continue; |
aa92d6ed | 979 | if (strcmp(argv[i], "--incremental-base") == 0 |
9fbd3822 | 980 | || strcmp(argv[i], "--incremental-patch") == 0 |
aa92d6ed CC |
981 | || strcmp(argv[i], "--debug") == 0) |
982 | { | |
983 | // When these options are used without the '=', skip the | |
984 | // following parameter as well. | |
985 | ++i; | |
986 | continue; | |
987 | } | |
b19b0c6d | 988 | |
3ce2c28e ILT |
989 | args.append(" '"); |
990 | // Now append argv[i], but with all single-quotes escaped | |
991 | const char* argpos = argv[i]; | |
992 | while (1) | |
2e702c99 RM |
993 | { |
994 | const int len = strcspn(argpos, "'"); | |
995 | args.append(argpos, len); | |
996 | if (argpos[len] == '\0') | |
997 | break; | |
998 | args.append("'\"'\"'"); | |
999 | argpos += len + 1; | |
1000 | } | |
3ce2c28e ILT |
1001 | args.append("'"); |
1002 | } | |
c4aa1e2d ILT |
1003 | |
1004 | this->command_line_ = args; | |
1005 | this->strtab_->add(this->command_line_.c_str(), false, | |
2e702c99 | 1006 | &this->command_line_key_); |
3ce2c28e ILT |
1007 | } |
1008 | ||
09ec0418 CC |
1009 | // Record the input archive file ARCHIVE. This is called by the |
1010 | // Add_archive_symbols task before determining which archive members | |
1011 | // to include. We create the Incremental_archive_entry here and | |
1012 | // attach it to the Archive, but we do not add it to the list of | |
1013 | // input objects until report_archive_end is called. | |
072fe7ce ILT |
1014 | |
1015 | void | |
c7975edd | 1016 | Incremental_inputs::report_archive_begin(Library_base* arch, |
cdc29364 | 1017 | unsigned int arg_serial, |
c7975edd | 1018 | Script_info* script_info) |
072fe7ce | 1019 | { |
09ec0418 | 1020 | Stringpool::Key filename_key; |
e0c52780 | 1021 | Timespec mtime = arch->get_mtime(); |
072fe7ce | 1022 | |
cdc29364 CC |
1023 | // For a file loaded from a script, don't record its argument serial number. |
1024 | if (script_info != NULL) | |
1025 | arg_serial = 0; | |
1026 | ||
09ec0418 CC |
1027 | this->strtab_->add(arch->filename().c_str(), false, &filename_key); |
1028 | Incremental_archive_entry* entry = | |
cdc29364 | 1029 | new Incremental_archive_entry(filename_key, arg_serial, mtime); |
09ec0418 | 1030 | arch->set_incremental_info(entry); |
c7975edd CC |
1031 | |
1032 | if (script_info != NULL) | |
1033 | { | |
1034 | Incremental_script_entry* script_entry = script_info->incremental_info(); | |
1035 | gold_assert(script_entry != NULL); | |
1036 | script_entry->add_object(entry); | |
1037 | } | |
072fe7ce ILT |
1038 | } |
1039 | ||
e0c52780 CC |
1040 | // Visitor class for processing the unused global symbols in a library. |
1041 | // An instance of this class is passed to the library's | |
1042 | // for_all_unused_symbols() iterator, which will call the visit() | |
1043 | // function for each global symbol defined in each unused library | |
1044 | // member. We add those symbol names to the incremental info for the | |
1045 | // library. | |
1046 | ||
1047 | class Unused_symbol_visitor : public Library_base::Symbol_visitor_base | |
1048 | { | |
1049 | public: | |
1050 | Unused_symbol_visitor(Incremental_archive_entry* entry, Stringpool* strtab) | |
1051 | : entry_(entry), strtab_(strtab) | |
1052 | { } | |
1053 | ||
1054 | void | |
1055 | visit(const char* sym) | |
1056 | { | |
1057 | Stringpool::Key symbol_key; | |
1058 | this->strtab_->add(sym, true, &symbol_key); | |
1059 | this->entry_->add_unused_global_symbol(symbol_key); | |
1060 | } | |
1061 | ||
1062 | private: | |
1063 | Incremental_archive_entry* entry_; | |
1064 | Stringpool* strtab_; | |
1065 | }; | |
1066 | ||
09ec0418 CC |
1067 | // Finish recording the input archive file ARCHIVE. This is called by the |
1068 | // Add_archive_symbols task after determining which archive members | |
1069 | // to include. | |
072fe7ce ILT |
1070 | |
1071 | void | |
e0c52780 | 1072 | Incremental_inputs::report_archive_end(Library_base* arch) |
072fe7ce | 1073 | { |
09ec0418 CC |
1074 | Incremental_archive_entry* entry = arch->incremental_info(); |
1075 | ||
1076 | gold_assert(entry != NULL); | |
cdc29364 | 1077 | this->inputs_.push_back(entry); |
09ec0418 CC |
1078 | |
1079 | // Collect unused global symbols. | |
e0c52780 CC |
1080 | Unused_symbol_visitor v(entry, this->strtab_); |
1081 | arch->for_all_unused_symbols(&v); | |
072fe7ce ILT |
1082 | } |
1083 | ||
09ec0418 CC |
1084 | // Record the input object file OBJ. If ARCH is not NULL, attach |
1085 | // the object file to the archive. This is called by the | |
1086 | // Add_symbols task after finding out the type of the file. | |
072fe7ce ILT |
1087 | |
1088 | void | |
cdc29364 CC |
1089 | Incremental_inputs::report_object(Object* obj, unsigned int arg_serial, |
1090 | Library_base* arch, Script_info* script_info) | |
072fe7ce | 1091 | { |
09ec0418 | 1092 | Stringpool::Key filename_key; |
cdc29364 CC |
1093 | Timespec mtime = obj->get_mtime(); |
1094 | ||
1095 | // For a file loaded from a script, don't record its argument serial number. | |
1096 | if (script_info != NULL) | |
1097 | arg_serial = 0; | |
09ec0418 CC |
1098 | |
1099 | this->strtab_->add(obj->name().c_str(), false, &filename_key); | |
072fe7ce | 1100 | |
0f1c85a6 CC |
1101 | Incremental_input_entry* input_entry; |
1102 | ||
1103 | this->current_object_ = obj; | |
1104 | ||
1105 | if (!obj->is_dynamic()) | |
09ec0418 | 1106 | { |
0f1c85a6 | 1107 | this->current_object_entry_ = |
2e702c99 | 1108 | new Incremental_object_entry(filename_key, obj, arg_serial, mtime); |
0f1c85a6 CC |
1109 | input_entry = this->current_object_entry_; |
1110 | if (arch != NULL) | |
1111 | { | |
1112 | Incremental_archive_entry* arch_entry = arch->incremental_info(); | |
1113 | gold_assert(arch_entry != NULL); | |
1114 | arch_entry->add_object(this->current_object_entry_); | |
1115 | } | |
09ec0418 | 1116 | } |
0f1c85a6 CC |
1117 | else |
1118 | { | |
1119 | this->current_object_entry_ = NULL; | |
1120 | Stringpool::Key soname_key; | |
1121 | Dynobj* dynobj = obj->dynobj(); | |
1122 | gold_assert(dynobj != NULL); | |
1123 | this->strtab_->add(dynobj->soname(), false, &soname_key); | |
1124 | input_entry = new Incremental_dynobj_entry(filename_key, soname_key, obj, | |
1125 | arg_serial, mtime); | |
1126 | } | |
1127 | ||
1128 | if (obj->is_in_system_directory()) | |
1129 | input_entry->set_is_in_system_directory(); | |
1130 | ||
1131 | if (obj->as_needed()) | |
1132 | input_entry->set_as_needed(); | |
1133 | ||
1134 | this->inputs_.push_back(input_entry); | |
09ec0418 | 1135 | |
c7975edd CC |
1136 | if (script_info != NULL) |
1137 | { | |
1138 | Incremental_script_entry* script_entry = script_info->incremental_info(); | |
1139 | gold_assert(script_entry != NULL); | |
0f1c85a6 | 1140 | script_entry->add_object(input_entry); |
c7975edd | 1141 | } |
072fe7ce ILT |
1142 | } |
1143 | ||
89d8a36b | 1144 | // Record an input section SHNDX from object file OBJ. |
072fe7ce ILT |
1145 | |
1146 | void | |
09ec0418 CC |
1147 | Incremental_inputs::report_input_section(Object* obj, unsigned int shndx, |
1148 | const char* name, off_t sh_size) | |
072fe7ce | 1149 | { |
09ec0418 | 1150 | Stringpool::Key key = 0; |
072fe7ce | 1151 | |
09ec0418 | 1152 | if (name != NULL) |
89d8a36b | 1153 | this->strtab_->add(name, true, &key); |
09ec0418 CC |
1154 | |
1155 | gold_assert(obj == this->current_object_); | |
0f1c85a6 | 1156 | gold_assert(this->current_object_entry_ != NULL); |
09ec0418 CC |
1157 | this->current_object_entry_->add_input_section(shndx, key, sh_size); |
1158 | } | |
1159 | ||
89d8a36b CC |
1160 | // Record a kept COMDAT group belonging to object file OBJ. |
1161 | ||
1162 | void | |
1163 | Incremental_inputs::report_comdat_group(Object* obj, const char* name) | |
1164 | { | |
1165 | Stringpool::Key key = 0; | |
1166 | ||
1167 | if (name != NULL) | |
1168 | this->strtab_->add(name, true, &key); | |
1169 | gold_assert(obj == this->current_object_); | |
1170 | gold_assert(this->current_object_entry_ != NULL); | |
1171 | this->current_object_entry_->add_comdat_group(key); | |
1172 | } | |
1173 | ||
09ec0418 CC |
1174 | // Record that the input argument INPUT is a script SCRIPT. This is |
1175 | // called by read_script after parsing the script and reading the list | |
1176 | // of inputs added by this script. | |
1177 | ||
1178 | void | |
cdc29364 CC |
1179 | Incremental_inputs::report_script(Script_info* script, |
1180 | unsigned int arg_serial, | |
1181 | Timespec mtime) | |
09ec0418 CC |
1182 | { |
1183 | Stringpool::Key filename_key; | |
1184 | ||
cdc29364 | 1185 | this->strtab_->add(script->filename().c_str(), false, &filename_key); |
09ec0418 | 1186 | Incremental_script_entry* entry = |
cdc29364 | 1187 | new Incremental_script_entry(filename_key, arg_serial, script, mtime); |
09ec0418 | 1188 | this->inputs_.push_back(entry); |
c7975edd | 1189 | script->set_incremental_info(entry); |
072fe7ce ILT |
1190 | } |
1191 | ||
3ce2c28e ILT |
1192 | // Finalize the incremental link information. Called from |
1193 | // Layout::finalize. | |
1194 | ||
1195 | void | |
1196 | Incremental_inputs::finalize() | |
1197 | { | |
09ec0418 | 1198 | // Finalize the string table. |
3ce2c28e ILT |
1199 | this->strtab_->set_string_offsets(); |
1200 | } | |
1201 | ||
09ec0418 | 1202 | // Create the .gnu_incremental_inputs, _symtab, and _relocs input sections. |
3ce2c28e | 1203 | |
09ec0418 CC |
1204 | void |
1205 | Incremental_inputs::create_data_sections(Symbol_table* symtab) | |
3ce2c28e | 1206 | { |
f038d496 CC |
1207 | int reloc_align = 4; |
1208 | ||
3ce2c28e ILT |
1209 | switch (parameters->size_and_endianness()) |
1210 | { | |
1211 | #ifdef HAVE_TARGET_32_LITTLE | |
1212 | case Parameters::TARGET_32_LITTLE: | |
09ec0418 | 1213 | this->inputs_section_ = |
2e702c99 | 1214 | new Output_section_incremental_inputs<32, false>(this, symtab); |
f038d496 | 1215 | reloc_align = 4; |
09ec0418 | 1216 | break; |
3ce2c28e ILT |
1217 | #endif |
1218 | #ifdef HAVE_TARGET_32_BIG | |
1219 | case Parameters::TARGET_32_BIG: | |
09ec0418 | 1220 | this->inputs_section_ = |
2e702c99 | 1221 | new Output_section_incremental_inputs<32, true>(this, symtab); |
f038d496 | 1222 | reloc_align = 4; |
09ec0418 | 1223 | break; |
3ce2c28e ILT |
1224 | #endif |
1225 | #ifdef HAVE_TARGET_64_LITTLE | |
1226 | case Parameters::TARGET_64_LITTLE: | |
09ec0418 | 1227 | this->inputs_section_ = |
2e702c99 | 1228 | new Output_section_incremental_inputs<64, false>(this, symtab); |
f038d496 | 1229 | reloc_align = 8; |
09ec0418 | 1230 | break; |
3ce2c28e ILT |
1231 | #endif |
1232 | #ifdef HAVE_TARGET_64_BIG | |
1233 | case Parameters::TARGET_64_BIG: | |
09ec0418 | 1234 | this->inputs_section_ = |
2e702c99 | 1235 | new Output_section_incremental_inputs<64, true>(this, symtab); |
f038d496 | 1236 | reloc_align = 8; |
09ec0418 | 1237 | break; |
3ce2c28e ILT |
1238 | #endif |
1239 | default: | |
1240 | gold_unreachable(); | |
072fe7ce | 1241 | } |
09ec0418 | 1242 | this->symtab_section_ = new Output_data_space(4, "** incremental_symtab"); |
f038d496 CC |
1243 | this->relocs_section_ = new Output_data_space(reloc_align, |
1244 | "** incremental_relocs"); | |
0e70b911 | 1245 | this->got_plt_section_ = new Output_data_space(4, "** incremental_got_plt"); |
3ce2c28e ILT |
1246 | } |
1247 | ||
09ec0418 CC |
1248 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
1249 | unsigned int | |
1250 | Incremental_inputs::relocs_entsize() const | |
1251 | { | |
1252 | return 8 + 2 * parameters->target().get_size() / 8; | |
1253 | } | |
1254 | ||
1255 | // Class Output_section_incremental_inputs. | |
1256 | ||
1257 | // Finalize the offsets for each input section and supplemental info block, | |
1258 | // and set the final data size of the incremental output sections. | |
3ce2c28e ILT |
1259 | |
1260 | template<int size, bool big_endian> | |
09ec0418 CC |
1261 | void |
1262 | Output_section_incremental_inputs<size, big_endian>::set_final_data_size() | |
072fe7ce | 1263 | { |
09ec0418 | 1264 | const Incremental_inputs* inputs = this->inputs_; |
09ec0418 CC |
1265 | |
1266 | // Offset of each input entry. | |
1267 | unsigned int input_offset = this->header_size; | |
1268 | ||
1269 | // Offset of each supplemental info block. | |
4829d394 | 1270 | unsigned int file_index = 0; |
09ec0418 CC |
1271 | unsigned int info_offset = this->header_size; |
1272 | info_offset += this->input_entry_size * inputs->input_file_count(); | |
1273 | ||
1274 | // Count each input file and its supplemental information block. | |
1275 | for (Incremental_inputs::Input_list::const_iterator p = | |
1276 | inputs->input_files().begin(); | |
1277 | p != inputs->input_files().end(); | |
1278 | ++p) | |
072fe7ce | 1279 | { |
4829d394 CC |
1280 | // Set the index and offset of the input file entry. |
1281 | (*p)->set_offset(file_index, input_offset); | |
1282 | ++file_index; | |
09ec0418 CC |
1283 | input_offset += this->input_entry_size; |
1284 | ||
1285 | // Set the offset of the supplemental info block. | |
1286 | switch ((*p)->type()) | |
1287 | { | |
1288 | case INCREMENTAL_INPUT_SCRIPT: | |
c7975edd CC |
1289 | { |
1290 | Incremental_script_entry *entry = (*p)->script_entry(); | |
1291 | gold_assert(entry != NULL); | |
1292 | (*p)->set_info_offset(info_offset); | |
1293 | // Object count. | |
1294 | info_offset += 4; | |
1295 | // Each member. | |
1296 | info_offset += (entry->get_object_count() * 4); | |
1297 | } | |
09ec0418 CC |
1298 | break; |
1299 | case INCREMENTAL_INPUT_OBJECT: | |
1300 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
1301 | { | |
ca09d69a | 1302 | Incremental_object_entry* entry = (*p)->object_entry(); |
09ec0418 CC |
1303 | gold_assert(entry != NULL); |
1304 | (*p)->set_info_offset(info_offset); | |
f0f9babf | 1305 | // Input section count, global symbol count, local symbol offset, |
89d8a36b CC |
1306 | // local symbol count, first dynamic reloc, dynamic reloc count, |
1307 | // comdat group count. | |
f038d496 | 1308 | info_offset += this->object_info_size; |
09ec0418 CC |
1309 | // Each input section. |
1310 | info_offset += (entry->get_input_section_count() | |
f038d496 | 1311 | * this->input_section_entry_size); |
09ec0418 CC |
1312 | // Each global symbol. |
1313 | const Object::Symbols* syms = entry->object()->get_global_symbols(); | |
f038d496 | 1314 | info_offset += syms->size() * this->global_sym_entry_size; |
89d8a36b CC |
1315 | // Each comdat group. |
1316 | info_offset += entry->get_comdat_group_count() * 4; | |
09ec0418 CC |
1317 | } |
1318 | break; | |
1319 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
1320 | { | |
0f1c85a6 | 1321 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
09ec0418 CC |
1322 | gold_assert(entry != NULL); |
1323 | (*p)->set_info_offset(info_offset); | |
0f1c85a6 CC |
1324 | // Global symbol count, soname index. |
1325 | info_offset += 8; | |
09ec0418 CC |
1326 | // Each global symbol. |
1327 | const Object::Symbols* syms = entry->object()->get_global_symbols(); | |
cdc29364 CC |
1328 | gold_assert(syms != NULL); |
1329 | unsigned int nsyms = syms->size(); | |
1330 | unsigned int nsyms_out = 0; | |
1331 | for (unsigned int i = 0; i < nsyms; ++i) | |
1332 | { | |
1333 | const Symbol* sym = (*syms)[i]; | |
1334 | if (sym == NULL) | |
1335 | continue; | |
1336 | if (sym->is_forwarder()) | |
1337 | sym = this->symtab_->resolve_forwards(sym); | |
2e702c99 RM |
1338 | if (sym->symtab_index() != -1U) |
1339 | ++nsyms_out; | |
cdc29364 CC |
1340 | } |
1341 | info_offset += nsyms_out * 4; | |
09ec0418 CC |
1342 | } |
1343 | break; | |
1344 | case INCREMENTAL_INPUT_ARCHIVE: | |
1345 | { | |
ca09d69a | 1346 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
09ec0418 CC |
1347 | gold_assert(entry != NULL); |
1348 | (*p)->set_info_offset(info_offset); | |
1349 | // Member count + unused global symbol count. | |
1350 | info_offset += 8; | |
1351 | // Each member. | |
1352 | info_offset += (entry->get_member_count() * 4); | |
1353 | // Each global symbol. | |
1354 | info_offset += (entry->get_unused_global_symbol_count() * 4); | |
1355 | } | |
1356 | break; | |
1357 | default: | |
1358 | gold_unreachable(); | |
1359 | } | |
f038d496 CC |
1360 | |
1361 | // Pad so each supplemental info block begins at an 8-byte boundary. | |
1362 | if (info_offset & 4) | |
1363 | info_offset += 4; | |
1364 | } | |
072fe7ce | 1365 | |
09ec0418 CC |
1366 | this->set_data_size(info_offset); |
1367 | ||
1368 | // Set the size of the .gnu_incremental_symtab section. | |
1369 | inputs->symtab_section()->set_current_data_size(this->symtab_->output_count() | |
1370 | * sizeof(unsigned int)); | |
1371 | ||
1372 | // Set the size of the .gnu_incremental_relocs section. | |
1373 | inputs->relocs_section()->set_current_data_size(inputs->get_reloc_count() | |
f038d496 | 1374 | * this->incr_reloc_size); |
0e70b911 CC |
1375 | |
1376 | // Set the size of the .gnu_incremental_got_plt section. | |
1377 | Sized_target<size, big_endian>* target = | |
1378 | parameters->sized_target<size, big_endian>(); | |
1379 | unsigned int got_count = target->got_entry_count(); | |
1380 | unsigned int plt_count = target->plt_entry_count(); | |
1381 | unsigned int got_plt_size = 8; // GOT entry count, PLT entry count. | |
1382 | got_plt_size = (got_plt_size + got_count + 3) & ~3; // GOT type array. | |
6fa2a40b | 1383 | got_plt_size += got_count * 8 + plt_count * 4; // GOT array, PLT array. |
0e70b911 | 1384 | inputs->got_plt_section()->set_current_data_size(got_plt_size); |
09ec0418 CC |
1385 | } |
1386 | ||
1387 | // Write the contents of the .gnu_incremental_inputs and | |
1388 | // .gnu_incremental_symtab sections. | |
1389 | ||
1390 | template<int size, bool big_endian> | |
1391 | void | |
1392 | Output_section_incremental_inputs<size, big_endian>::do_write(Output_file* of) | |
1393 | { | |
1394 | const Incremental_inputs* inputs = this->inputs_; | |
1395 | Stringpool* strtab = inputs->get_stringpool(); | |
1396 | ||
1397 | // Get a view into the .gnu_incremental_inputs section. | |
1398 | const off_t off = this->offset(); | |
1399 | const off_t oview_size = this->data_size(); | |
1400 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1401 | unsigned char* pov = oview; | |
1402 | ||
1403 | // Get a view into the .gnu_incremental_symtab section. | |
1404 | const off_t symtab_off = inputs->symtab_section()->offset(); | |
1405 | const off_t symtab_size = inputs->symtab_section()->data_size(); | |
1406 | unsigned char* const symtab_view = of->get_output_view(symtab_off, | |
1407 | symtab_size); | |
1408 | ||
1409 | // Allocate an array of linked list heads for the .gnu_incremental_symtab | |
1410 | // section. Each element corresponds to a global symbol in the output | |
1411 | // symbol table, and points to the head of the linked list that threads | |
1412 | // through the object file input entries. The value of each element | |
1413 | // is the section-relative offset to a global symbol entry in a | |
1414 | // supplemental information block. | |
1415 | unsigned int global_sym_count = this->symtab_->output_count(); | |
1416 | unsigned int* global_syms = new unsigned int[global_sym_count]; | |
1417 | memset(global_syms, 0, global_sym_count * sizeof(unsigned int)); | |
1418 | ||
1419 | // Write the section header. | |
1420 | Stringpool::Key command_line_key = inputs->command_line_key(); | |
1421 | pov = this->write_header(pov, inputs->input_file_count(), | |
1422 | strtab->get_offset_from_key(command_line_key)); | |
1423 | ||
1424 | // Write the list of input files. | |
1425 | pov = this->write_input_files(oview, pov, strtab); | |
1426 | ||
1427 | // Write the supplemental information blocks for each input file. | |
1428 | pov = this->write_info_blocks(oview, pov, strtab, global_syms, | |
1429 | global_sym_count); | |
1430 | ||
1431 | gold_assert(pov - oview == oview_size); | |
1432 | ||
1433 | // Write the .gnu_incremental_symtab section. | |
50ed5eb1 | 1434 | gold_assert(static_cast<off_t>(global_sym_count) * 4 == symtab_size); |
09ec0418 CC |
1435 | this->write_symtab(symtab_view, global_syms, global_sym_count); |
1436 | ||
1437 | delete[] global_syms; | |
1438 | ||
0e70b911 CC |
1439 | // Write the .gnu_incremental_got_plt section. |
1440 | const off_t got_plt_off = inputs->got_plt_section()->offset(); | |
1441 | const off_t got_plt_size = inputs->got_plt_section()->data_size(); | |
1442 | unsigned char* const got_plt_view = of->get_output_view(got_plt_off, | |
1443 | got_plt_size); | |
1444 | this->write_got_plt(got_plt_view, got_plt_size); | |
1445 | ||
09ec0418 CC |
1446 | of->write_output_view(off, oview_size, oview); |
1447 | of->write_output_view(symtab_off, symtab_size, symtab_view); | |
0e70b911 | 1448 | of->write_output_view(got_plt_off, got_plt_size, got_plt_view); |
09ec0418 CC |
1449 | } |
1450 | ||
1451 | // Write the section header: version, input file count, offset of command line | |
1452 | // in the string table, and 4 bytes of padding. | |
1453 | ||
1454 | template<int size, bool big_endian> | |
1455 | unsigned char* | |
1456 | Output_section_incremental_inputs<size, big_endian>::write_header( | |
1457 | unsigned char* pov, | |
1458 | unsigned int input_file_count, | |
1459 | section_offset_type command_line_offset) | |
1460 | { | |
1461 | Swap32::writeval(pov, INCREMENTAL_LINK_VERSION); | |
1462 | Swap32::writeval(pov + 4, input_file_count); | |
1463 | Swap32::writeval(pov + 8, command_line_offset); | |
1464 | Swap32::writeval(pov + 12, 0); | |
f038d496 | 1465 | gold_assert(this->header_size == 16); |
09ec0418 CC |
1466 | return pov + this->header_size; |
1467 | } | |
1468 | ||
1469 | // Write the input file entries. | |
1470 | ||
1471 | template<int size, bool big_endian> | |
1472 | unsigned char* | |
1473 | Output_section_incremental_inputs<size, big_endian>::write_input_files( | |
1474 | unsigned char* oview, | |
1475 | unsigned char* pov, | |
1476 | Stringpool* strtab) | |
1477 | { | |
1478 | const Incremental_inputs* inputs = this->inputs_; | |
1479 | ||
1480 | for (Incremental_inputs::Input_list::const_iterator p = | |
1481 | inputs->input_files().begin(); | |
1482 | p != inputs->input_files().end(); | |
1483 | ++p) | |
1484 | { | |
56f75c03 | 1485 | gold_assert(static_cast<unsigned int>(pov - oview) == (*p)->get_offset()); |
09ec0418 | 1486 | section_offset_type filename_offset = |
2e702c99 | 1487 | strtab->get_offset_from_key((*p)->get_filename_key()); |
09ec0418 | 1488 | const Timespec& mtime = (*p)->get_mtime(); |
cdc29364 CC |
1489 | unsigned int flags = (*p)->type(); |
1490 | if ((*p)->is_in_system_directory()) | |
2e702c99 | 1491 | flags |= INCREMENTAL_INPUT_IN_SYSTEM_DIR; |
0f1c85a6 | 1492 | if ((*p)->as_needed()) |
2e702c99 | 1493 | flags |= INCREMENTAL_INPUT_AS_NEEDED; |
09ec0418 CC |
1494 | Swap32::writeval(pov, filename_offset); |
1495 | Swap32::writeval(pov + 4, (*p)->get_info_offset()); | |
1496 | Swap64::writeval(pov + 8, mtime.seconds); | |
1497 | Swap32::writeval(pov + 16, mtime.nanoseconds); | |
cdc29364 CC |
1498 | Swap16::writeval(pov + 20, flags); |
1499 | Swap16::writeval(pov + 22, (*p)->arg_serial()); | |
f038d496 | 1500 | gold_assert(this->input_entry_size == 24); |
09ec0418 CC |
1501 | pov += this->input_entry_size; |
1502 | } | |
1503 | return pov; | |
1504 | } | |
1505 | ||
1506 | // Write the supplemental information blocks. | |
1507 | ||
1508 | template<int size, bool big_endian> | |
1509 | unsigned char* | |
1510 | Output_section_incremental_inputs<size, big_endian>::write_info_blocks( | |
1511 | unsigned char* oview, | |
1512 | unsigned char* pov, | |
1513 | Stringpool* strtab, | |
1514 | unsigned int* global_syms, | |
1515 | unsigned int global_sym_count) | |
1516 | { | |
1517 | const Incremental_inputs* inputs = this->inputs_; | |
1518 | unsigned int first_global_index = this->symtab_->first_global_index(); | |
1519 | ||
1520 | for (Incremental_inputs::Input_list::const_iterator p = | |
1521 | inputs->input_files().begin(); | |
1522 | p != inputs->input_files().end(); | |
1523 | ++p) | |
1524 | { | |
1525 | switch ((*p)->type()) | |
1526 | { | |
1527 | case INCREMENTAL_INPUT_SCRIPT: | |
c7975edd CC |
1528 | { |
1529 | gold_assert(static_cast<unsigned int>(pov - oview) | |
1530 | == (*p)->get_info_offset()); | |
1531 | Incremental_script_entry* entry = (*p)->script_entry(); | |
1532 | gold_assert(entry != NULL); | |
1533 | ||
1534 | // Write the object count. | |
1535 | unsigned int nobjects = entry->get_object_count(); | |
1536 | Swap32::writeval(pov, nobjects); | |
1537 | pov += 4; | |
1538 | ||
1539 | // For each object, write the offset to its input file entry. | |
1540 | for (unsigned int i = 0; i < nobjects; ++i) | |
1541 | { | |
1542 | Incremental_input_entry* obj = entry->get_object(i); | |
1543 | Swap32::writeval(pov, obj->get_offset()); | |
1544 | pov += 4; | |
1545 | } | |
1546 | } | |
09ec0418 CC |
1547 | break; |
1548 | ||
1549 | case INCREMENTAL_INPUT_OBJECT: | |
1550 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
1551 | { | |
56f75c03 ILT |
1552 | gold_assert(static_cast<unsigned int>(pov - oview) |
1553 | == (*p)->get_info_offset()); | |
09ec0418 CC |
1554 | Incremental_object_entry* entry = (*p)->object_entry(); |
1555 | gold_assert(entry != NULL); | |
1556 | const Object* obj = entry->object(); | |
f0f9babf | 1557 | const Relobj* relobj = static_cast<const Relobj*>(obj); |
09ec0418 CC |
1558 | const Object::Symbols* syms = obj->get_global_symbols(); |
1559 | // Write the input section count and global symbol count. | |
1560 | unsigned int nsections = entry->get_input_section_count(); | |
1561 | unsigned int nsyms = syms->size(); | |
f0f9babf CC |
1562 | off_t locals_offset = relobj->local_symbol_offset(); |
1563 | unsigned int nlocals = relobj->output_local_symbol_count(); | |
6fa2a40b CC |
1564 | unsigned int first_dynrel = relobj->first_dyn_reloc(); |
1565 | unsigned int ndynrel = relobj->dyn_reloc_count(); | |
89d8a36b | 1566 | unsigned int ncomdat = entry->get_comdat_group_count(); |
09ec0418 CC |
1567 | Swap32::writeval(pov, nsections); |
1568 | Swap32::writeval(pov + 4, nsyms); | |
f0f9babf CC |
1569 | Swap32::writeval(pov + 8, static_cast<unsigned int>(locals_offset)); |
1570 | Swap32::writeval(pov + 12, nlocals); | |
6fa2a40b CC |
1571 | Swap32::writeval(pov + 16, first_dynrel); |
1572 | Swap32::writeval(pov + 20, ndynrel); | |
89d8a36b | 1573 | Swap32::writeval(pov + 24, ncomdat); |
f038d496 CC |
1574 | Swap32::writeval(pov + 28, 0); |
1575 | gold_assert(this->object_info_size == 32); | |
1576 | pov += this->object_info_size; | |
09ec0418 | 1577 | |
cdc29364 CC |
1578 | // Build a temporary array to map input section indexes |
1579 | // from the original object file index to the index in the | |
1580 | // incremental info table. | |
1581 | unsigned int* index_map = new unsigned int[obj->shnum()]; | |
1582 | memset(index_map, 0, obj->shnum() * sizeof(unsigned int)); | |
1583 | ||
09ec0418 CC |
1584 | // For each input section, write the name, output section index, |
1585 | // offset within output section, and input section size. | |
1586 | for (unsigned int i = 0; i < nsections; i++) | |
1587 | { | |
cdc29364 CC |
1588 | unsigned int shndx = entry->get_input_section_index(i); |
1589 | index_map[shndx] = i + 1; | |
09ec0418 CC |
1590 | Stringpool::Key key = entry->get_input_section_name_key(i); |
1591 | off_t name_offset = 0; | |
1592 | if (key != 0) | |
1593 | name_offset = strtab->get_offset_from_key(key); | |
1594 | int out_shndx = 0; | |
1595 | off_t out_offset = 0; | |
1596 | off_t sh_size = 0; | |
cdc29364 | 1597 | Output_section* os = obj->output_section(shndx); |
09ec0418 CC |
1598 | if (os != NULL) |
1599 | { | |
1600 | out_shndx = os->out_shndx(); | |
cdc29364 | 1601 | out_offset = obj->output_section_offset(shndx); |
09ec0418 CC |
1602 | sh_size = entry->get_input_section_size(i); |
1603 | } | |
1604 | Swap32::writeval(pov, name_offset); | |
1605 | Swap32::writeval(pov + 4, out_shndx); | |
1606 | Swap::writeval(pov + 8, out_offset); | |
1607 | Swap::writeval(pov + 8 + sizeof_addr, sh_size); | |
f038d496 CC |
1608 | gold_assert(this->input_section_entry_size |
1609 | == 8 + 2 * sizeof_addr); | |
1610 | pov += this->input_section_entry_size; | |
09ec0418 CC |
1611 | } |
1612 | ||
1613 | // For each global symbol, write its associated relocations, | |
1614 | // add it to the linked list of globals, then write the | |
1615 | // supplemental information: global symbol table index, | |
cdc29364 CC |
1616 | // input section index, linked list chain pointer, relocation |
1617 | // count, and offset to the relocations. | |
09ec0418 CC |
1618 | for (unsigned int i = 0; i < nsyms; i++) |
1619 | { | |
1620 | const Symbol* sym = (*syms)[i]; | |
793990de CC |
1621 | if (sym->is_forwarder()) |
1622 | sym = this->symtab_->resolve_forwards(sym); | |
cdc29364 | 1623 | unsigned int shndx = 0; |
5146f448 CC |
1624 | if (sym->source() != Symbol::FROM_OBJECT) |
1625 | { | |
1626 | // The symbol was defined by the linker (e.g., common). | |
1627 | // We mark these symbols with a special SHNDX of -1, | |
1628 | // but exclude linker-predefined symbols and symbols | |
1629 | // copied from shared objects. | |
1630 | if (!sym->is_predefined() | |
2e702c99 | 1631 | && !sym->is_copied_from_dynobj()) |
5146f448 CC |
1632 | shndx = -1U; |
1633 | } | |
1634 | else if (sym->object() == obj && sym->is_defined()) | |
cdc29364 CC |
1635 | { |
1636 | bool is_ordinary; | |
1637 | unsigned int orig_shndx = sym->shndx(&is_ordinary); | |
1638 | if (is_ordinary) | |
1639 | shndx = index_map[orig_shndx]; | |
5146f448 CC |
1640 | else |
1641 | shndx = 1; | |
cdc29364 | 1642 | } |
09ec0418 CC |
1643 | unsigned int symtab_index = sym->symtab_index(); |
1644 | unsigned int chain = 0; | |
1645 | unsigned int first_reloc = 0; | |
1646 | unsigned int nrelocs = obj->get_incremental_reloc_count(i); | |
1647 | if (nrelocs > 0) | |
1648 | { | |
1649 | gold_assert(symtab_index != -1U | |
1650 | && (symtab_index - first_global_index | |
1651 | < global_sym_count)); | |
1652 | first_reloc = obj->get_incremental_reloc_base(i); | |
1653 | chain = global_syms[symtab_index - first_global_index]; | |
1654 | global_syms[symtab_index - first_global_index] = | |
1655 | pov - oview; | |
1656 | } | |
1657 | Swap32::writeval(pov, symtab_index); | |
cdc29364 CC |
1658 | Swap32::writeval(pov + 4, shndx); |
1659 | Swap32::writeval(pov + 8, chain); | |
1660 | Swap32::writeval(pov + 12, nrelocs); | |
c335b55d L |
1661 | Swap32::writeval(pov + 16, |
1662 | first_reloc * (8 + 2 * sizeof_addr)); | |
f038d496 CC |
1663 | gold_assert(this->global_sym_entry_size == 20); |
1664 | pov += this->global_sym_entry_size; | |
09ec0418 | 1665 | } |
cdc29364 | 1666 | |
89d8a36b CC |
1667 | // For each kept COMDAT group, write the group signature. |
1668 | for (unsigned int i = 0; i < ncomdat; i++) | |
1669 | { | |
1670 | Stringpool::Key key = entry->get_comdat_signature_key(i); | |
1671 | off_t name_offset = 0; | |
1672 | if (key != 0) | |
1673 | name_offset = strtab->get_offset_from_key(key); | |
1674 | Swap32::writeval(pov, name_offset); | |
1675 | pov += 4; | |
1676 | } | |
1677 | ||
cdc29364 | 1678 | delete[] index_map; |
09ec0418 CC |
1679 | } |
1680 | break; | |
1681 | ||
1682 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
1683 | { | |
56f75c03 ILT |
1684 | gold_assert(static_cast<unsigned int>(pov - oview) |
1685 | == (*p)->get_info_offset()); | |
0f1c85a6 | 1686 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
09ec0418 | 1687 | gold_assert(entry != NULL); |
26d3c67d CC |
1688 | Object* obj = entry->object(); |
1689 | Dynobj* dynobj = obj->dynobj(); | |
1690 | gold_assert(dynobj != NULL); | |
09ec0418 CC |
1691 | const Object::Symbols* syms = obj->get_global_symbols(); |
1692 | ||
0f1c85a6 CC |
1693 | // Write the soname string table index. |
1694 | section_offset_type soname_offset = | |
1695 | strtab->get_offset_from_key(entry->get_soname_key()); | |
1696 | Swap32::writeval(pov, soname_offset); | |
1697 | pov += 4; | |
1698 | ||
cdc29364 CC |
1699 | // Skip the global symbol count for now. |
1700 | unsigned char* orig_pov = pov; | |
09ec0418 CC |
1701 | pov += 4; |
1702 | ||
1703 | // For each global symbol, write the global symbol table index. | |
cdc29364 CC |
1704 | unsigned int nsyms = syms->size(); |
1705 | unsigned int nsyms_out = 0; | |
09ec0418 CC |
1706 | for (unsigned int i = 0; i < nsyms; i++) |
1707 | { | |
1708 | const Symbol* sym = (*syms)[i]; | |
cdc29364 CC |
1709 | if (sym == NULL) |
1710 | continue; | |
1711 | if (sym->is_forwarder()) | |
1712 | sym = this->symtab_->resolve_forwards(sym); | |
2e702c99 RM |
1713 | if (sym->symtab_index() == -1U) |
1714 | continue; | |
26d3c67d | 1715 | unsigned int flags = 0; |
f48b5fb7 CC |
1716 | // If the symbol has hidden or internal visibility, we |
1717 | // mark it as defined in the shared object so we don't | |
1718 | // try to resolve it during an incremental update. | |
1719 | if (sym->visibility() == elfcpp::STV_HIDDEN | |
1720 | || sym->visibility() == elfcpp::STV_INTERNAL) | |
1721 | flags = INCREMENTAL_SHLIB_SYM_DEF; | |
1722 | else if (sym->source() == Symbol::FROM_OBJECT | |
1723 | && sym->object() == obj | |
1724 | && sym->is_defined()) | |
26d3c67d CC |
1725 | flags = INCREMENTAL_SHLIB_SYM_DEF; |
1726 | else if (sym->is_copied_from_dynobj() | |
1727 | && this->symtab_->get_copy_source(sym) == dynobj) | |
1728 | flags = INCREMENTAL_SHLIB_SYM_COPY; | |
1729 | flags <<= INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT; | |
1730 | Swap32::writeval(pov, sym->symtab_index() | flags); | |
09ec0418 | 1731 | pov += 4; |
cdc29364 | 1732 | ++nsyms_out; |
09ec0418 | 1733 | } |
cdc29364 CC |
1734 | |
1735 | // Now write the global symbol count. | |
1736 | Swap32::writeval(orig_pov, nsyms_out); | |
09ec0418 CC |
1737 | } |
1738 | break; | |
1739 | ||
1740 | case INCREMENTAL_INPUT_ARCHIVE: | |
1741 | { | |
56f75c03 ILT |
1742 | gold_assert(static_cast<unsigned int>(pov - oview) |
1743 | == (*p)->get_info_offset()); | |
09ec0418 CC |
1744 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
1745 | gold_assert(entry != NULL); | |
1746 | ||
1747 | // Write the member count and unused global symbol count. | |
1748 | unsigned int nmembers = entry->get_member_count(); | |
1749 | unsigned int nsyms = entry->get_unused_global_symbol_count(); | |
1750 | Swap32::writeval(pov, nmembers); | |
1751 | Swap32::writeval(pov + 4, nsyms); | |
1752 | pov += 8; | |
1753 | ||
1754 | // For each member, write the offset to its input file entry. | |
1755 | for (unsigned int i = 0; i < nmembers; ++i) | |
1756 | { | |
1757 | Incremental_object_entry* member = entry->get_member(i); | |
1758 | Swap32::writeval(pov, member->get_offset()); | |
1759 | pov += 4; | |
1760 | } | |
1761 | ||
1762 | // For each global symbol, write the name offset. | |
1763 | for (unsigned int i = 0; i < nsyms; ++i) | |
1764 | { | |
1765 | Stringpool::Key key = entry->get_unused_global_symbol(i); | |
1766 | Swap32::writeval(pov, strtab->get_offset_from_key(key)); | |
1767 | pov += 4; | |
1768 | } | |
1769 | } | |
1770 | break; | |
1771 | ||
1772 | default: | |
1773 | gold_unreachable(); | |
1774 | } | |
f038d496 CC |
1775 | |
1776 | // Pad the info block to a multiple of 8 bytes. | |
1777 | if (static_cast<unsigned int>(pov - oview) & 4) | |
1778 | { | |
1779 | Swap32::writeval(pov, 0); | |
1780 | pov += 4; | |
1781 | } | |
09ec0418 CC |
1782 | } |
1783 | return pov; | |
1784 | } | |
1785 | ||
1786 | // Write the contents of the .gnu_incremental_symtab section. | |
1787 | ||
1788 | template<int size, bool big_endian> | |
1789 | void | |
1790 | Output_section_incremental_inputs<size, big_endian>::write_symtab( | |
1791 | unsigned char* pov, | |
1792 | unsigned int* global_syms, | |
1793 | unsigned int global_sym_count) | |
1794 | { | |
1795 | for (unsigned int i = 0; i < global_sym_count; ++i) | |
1796 | { | |
1797 | Swap32::writeval(pov, global_syms[i]); | |
1798 | pov += 4; | |
1799 | } | |
3ce2c28e ILT |
1800 | } |
1801 | ||
0e70b911 CC |
1802 | // This struct holds the view information needed to write the |
1803 | // .gnu_incremental_got_plt section. | |
1804 | ||
1805 | struct Got_plt_view_info | |
1806 | { | |
1807 | // Start of the GOT type array in the output view. | |
1808 | unsigned char* got_type_p; | |
1809 | // Start of the GOT descriptor array in the output view. | |
1810 | unsigned char* got_desc_p; | |
1811 | // Start of the PLT descriptor array in the output view. | |
1812 | unsigned char* plt_desc_p; | |
1813 | // Number of GOT entries. | |
1814 | unsigned int got_count; | |
1815 | // Number of PLT entries. | |
1816 | unsigned int plt_count; | |
1817 | // Offset of the first non-reserved PLT entry (this is a target-dependent value). | |
1818 | unsigned int first_plt_entry_offset; | |
1819 | // Size of a PLT entry (this is a target-dependent value). | |
1820 | unsigned int plt_entry_size; | |
6fa2a40b CC |
1821 | // Symbol index to write in the GOT descriptor array. For global symbols, |
1822 | // this is the global symbol table index; for local symbols, it is the | |
1823 | // local symbol table index. | |
1824 | unsigned int sym_index; | |
1825 | // Input file index to write in the GOT descriptor array. For global | |
1826 | // symbols, this is 0; for local symbols, it is the index of the input | |
1827 | // file entry in the .gnu_incremental_inputs section. | |
1828 | unsigned int input_index; | |
0e70b911 CC |
1829 | }; |
1830 | ||
1831 | // Functor class for processing a GOT offset list for local symbols. | |
1832 | // Writes the GOT type and symbol index into the GOT type and descriptor | |
1833 | // arrays in the output section. | |
1834 | ||
1835 | template<int size, bool big_endian> | |
cdc29364 | 1836 | class Local_got_offset_visitor : public Got_offset_list::Visitor |
0e70b911 CC |
1837 | { |
1838 | public: | |
1839 | Local_got_offset_visitor(struct Got_plt_view_info& info) | |
1840 | : info_(info) | |
1841 | { } | |
1842 | ||
1843 | void | |
cdc29364 | 1844 | visit(unsigned int got_type, unsigned int got_offset) |
0e70b911 CC |
1845 | { |
1846 | unsigned int got_index = got_offset / this->got_entry_size_; | |
1847 | gold_assert(got_index < this->info_.got_count); | |
1848 | // We can only handle GOT entry types in the range 0..0x7e | |
1849 | // because we use a byte array to store them, and we use the | |
1850 | // high bit to flag a local symbol. | |
1851 | gold_assert(got_type < 0x7f); | |
1852 | this->info_.got_type_p[got_index] = got_type | 0x80; | |
6fa2a40b CC |
1853 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
1854 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); | |
1855 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, this->info_.input_index); | |
0e70b911 CC |
1856 | } |
1857 | ||
1858 | private: | |
1859 | static const unsigned int got_entry_size_ = size / 8; | |
1860 | struct Got_plt_view_info& info_; | |
1861 | }; | |
1862 | ||
1863 | // Functor class for processing a GOT offset list. Writes the GOT type | |
1864 | // and symbol index into the GOT type and descriptor arrays in the output | |
1865 | // section. | |
1866 | ||
1867 | template<int size, bool big_endian> | |
cdc29364 | 1868 | class Global_got_offset_visitor : public Got_offset_list::Visitor |
0e70b911 CC |
1869 | { |
1870 | public: | |
1871 | Global_got_offset_visitor(struct Got_plt_view_info& info) | |
1872 | : info_(info) | |
1873 | { } | |
1874 | ||
1875 | void | |
cdc29364 | 1876 | visit(unsigned int got_type, unsigned int got_offset) |
0e70b911 CC |
1877 | { |
1878 | unsigned int got_index = got_offset / this->got_entry_size_; | |
1879 | gold_assert(got_index < this->info_.got_count); | |
1880 | // We can only handle GOT entry types in the range 0..0x7e | |
1881 | // because we use a byte array to store them, and we use the | |
1882 | // high bit to flag a local symbol. | |
1883 | gold_assert(got_type < 0x7f); | |
1884 | this->info_.got_type_p[got_index] = got_type; | |
6fa2a40b CC |
1885 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
1886 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); | |
1887 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, 0); | |
0e70b911 CC |
1888 | } |
1889 | ||
1890 | private: | |
1891 | static const unsigned int got_entry_size_ = size / 8; | |
1892 | struct Got_plt_view_info& info_; | |
1893 | }; | |
1894 | ||
1895 | // Functor class for processing the global symbol table. Processes the | |
1896 | // GOT offset list for the symbol, and writes the symbol table index | |
1897 | // into the PLT descriptor array in the output section. | |
1898 | ||
1899 | template<int size, bool big_endian> | |
1900 | class Global_symbol_visitor_got_plt | |
1901 | { | |
1902 | public: | |
1903 | Global_symbol_visitor_got_plt(struct Got_plt_view_info& info) | |
1904 | : info_(info) | |
1905 | { } | |
1906 | ||
1907 | void | |
1908 | operator()(const Sized_symbol<size>* sym) | |
1909 | { | |
1910 | typedef Global_got_offset_visitor<size, big_endian> Got_visitor; | |
1911 | const Got_offset_list* got_offsets = sym->got_offset_list(); | |
1912 | if (got_offsets != NULL) | |
1913 | { | |
2e702c99 RM |
1914 | this->info_.sym_index = sym->symtab_index(); |
1915 | this->info_.input_index = 0; | |
1916 | Got_visitor v(this->info_); | |
cdc29364 | 1917 | got_offsets->for_all_got_offsets(&v); |
0e70b911 CC |
1918 | } |
1919 | if (sym->has_plt_offset()) | |
1920 | { | |
1921 | unsigned int plt_index = | |
1922 | ((sym->plt_offset() - this->info_.first_plt_entry_offset) | |
1923 | / this->info_.plt_entry_size); | |
1924 | gold_assert(plt_index < this->info_.plt_count); | |
1925 | unsigned char* pov = this->info_.plt_desc_p + plt_index * 4; | |
1926 | elfcpp::Swap<32, big_endian>::writeval(pov, sym->symtab_index()); | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | private: | |
1931 | struct Got_plt_view_info& info_; | |
1932 | }; | |
1933 | ||
1934 | // Write the contents of the .gnu_incremental_got_plt section. | |
1935 | ||
1936 | template<int size, bool big_endian> | |
1937 | void | |
1938 | Output_section_incremental_inputs<size, big_endian>::write_got_plt( | |
1939 | unsigned char* pov, | |
1940 | off_t view_size) | |
1941 | { | |
1942 | Sized_target<size, big_endian>* target = | |
1943 | parameters->sized_target<size, big_endian>(); | |
1944 | ||
1945 | // Set up the view information for the functors. | |
1946 | struct Got_plt_view_info view_info; | |
1947 | view_info.got_count = target->got_entry_count(); | |
1948 | view_info.plt_count = target->plt_entry_count(); | |
1949 | view_info.first_plt_entry_offset = target->first_plt_entry_offset(); | |
1950 | view_info.plt_entry_size = target->plt_entry_size(); | |
1951 | view_info.got_type_p = pov + 8; | |
1952 | view_info.got_desc_p = (view_info.got_type_p | |
1953 | + ((view_info.got_count + 3) & ~3)); | |
6fa2a40b | 1954 | view_info.plt_desc_p = view_info.got_desc_p + view_info.got_count * 8; |
0e70b911 CC |
1955 | |
1956 | gold_assert(pov + view_size == | |
1957 | view_info.plt_desc_p + view_info.plt_count * 4); | |
1958 | ||
1959 | // Write the section header. | |
1960 | Swap32::writeval(pov, view_info.got_count); | |
1961 | Swap32::writeval(pov + 4, view_info.plt_count); | |
1962 | ||
1963 | // Initialize the GOT type array to 0xff (reserved). | |
1964 | memset(view_info.got_type_p, 0xff, view_info.got_count); | |
1965 | ||
1966 | // Write the incremental GOT descriptors for local symbols. | |
cdc29364 | 1967 | typedef Local_got_offset_visitor<size, big_endian> Got_visitor; |
0e70b911 CC |
1968 | for (Incremental_inputs::Input_list::const_iterator p = |
1969 | this->inputs_->input_files().begin(); | |
1970 | p != this->inputs_->input_files().end(); | |
1971 | ++p) | |
1972 | { | |
1973 | if ((*p)->type() != INCREMENTAL_INPUT_OBJECT | |
1974 | && (*p)->type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER) | |
1975 | continue; | |
1976 | Incremental_object_entry* entry = (*p)->object_entry(); | |
1977 | gold_assert(entry != NULL); | |
cdc29364 | 1978 | const Object* obj = entry->object(); |
0e70b911 | 1979 | gold_assert(obj != NULL); |
6fa2a40b | 1980 | view_info.input_index = (*p)->get_file_index(); |
cdc29364 CC |
1981 | Got_visitor v(view_info); |
1982 | obj->for_all_local_got_entries(&v); | |
0e70b911 CC |
1983 | } |
1984 | ||
1985 | // Write the incremental GOT and PLT descriptors for global symbols. | |
1986 | typedef Global_symbol_visitor_got_plt<size, big_endian> Symbol_visitor; | |
1987 | symtab_->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(view_info)); | |
1988 | } | |
1989 | ||
6fa2a40b | 1990 | // Class Sized_relobj_incr. Most of these methods are not used for |
cdc29364 CC |
1991 | // Incremental objects, but are required to be implemented by the |
1992 | // base class Object. | |
1993 | ||
1994 | template<int size, bool big_endian> | |
6fa2a40b | 1995 | Sized_relobj_incr<size, big_endian>::Sized_relobj_incr( |
cdc29364 CC |
1996 | const std::string& name, |
1997 | Sized_incremental_binary<size, big_endian>* ibase, | |
1998 | unsigned int input_file_index) | |
6fa2a40b | 1999 | : Sized_relobj<size, big_endian>(name, NULL), ibase_(ibase), |
cdc29364 CC |
2000 | input_file_index_(input_file_index), |
2001 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), | |
f0f9babf CC |
2002 | local_symbol_count_(0), output_local_dynsym_count_(0), |
2003 | local_symbol_index_(0), local_symbol_offset_(0), local_dynsym_offset_(0), | |
53bbcc1b CC |
2004 | symbols_(), defined_count_(0), incr_reloc_offset_(-1U), |
2005 | incr_reloc_count_(0), incr_reloc_output_index_(0), incr_relocs_(NULL), | |
2006 | local_symbols_() | |
cdc29364 CC |
2007 | { |
2008 | if (this->input_reader_.is_in_system_directory()) | |
2009 | this->set_is_in_system_directory(); | |
2010 | const unsigned int shnum = this->input_reader_.get_input_section_count() + 1; | |
2011 | this->set_shnum(shnum); | |
6fa2a40b | 2012 | ibase->set_input_object(input_file_index, this); |
cdc29364 CC |
2013 | } |
2014 | ||
2015 | // Read the symbols. | |
2016 | ||
2017 | template<int size, bool big_endian> | |
2018 | void | |
6fa2a40b | 2019 | Sized_relobj_incr<size, big_endian>::do_read_symbols(Read_symbols_data*) |
cdc29364 CC |
2020 | { |
2021 | gold_unreachable(); | |
2022 | } | |
2023 | ||
2024 | // Lay out the input sections. | |
2025 | ||
2026 | template<int size, bool big_endian> | |
2027 | void | |
6fa2a40b | 2028 | Sized_relobj_incr<size, big_endian>::do_layout( |
cdc29364 CC |
2029 | Symbol_table*, |
2030 | Layout* layout, | |
2031 | Read_symbols_data*) | |
2032 | { | |
2033 | const unsigned int shnum = this->shnum(); | |
2034 | Incremental_inputs* incremental_inputs = layout->incremental_inputs(); | |
2035 | gold_assert(incremental_inputs != NULL); | |
2036 | Output_sections& out_sections(this->output_sections()); | |
2037 | out_sections.resize(shnum); | |
6fa2a40b | 2038 | this->section_offsets().resize(shnum); |
c1027032 CC |
2039 | |
2040 | // Keep track of .debug_info and .debug_types sections. | |
2041 | std::vector<unsigned int> debug_info_sections; | |
2042 | std::vector<unsigned int> debug_types_sections; | |
2043 | ||
cdc29364 CC |
2044 | for (unsigned int i = 1; i < shnum; i++) |
2045 | { | |
2046 | typename Input_entry_reader::Input_section_info sect = | |
2e702c99 | 2047 | this->input_reader_.get_input_section(i - 1); |
cdc29364 CC |
2048 | // Add the section to the incremental inputs layout. |
2049 | incremental_inputs->report_input_section(this, i, sect.name, | |
2050 | sect.sh_size); | |
2051 | if (sect.output_shndx == 0 || sect.sh_offset == -1) | |
2e702c99 | 2052 | continue; |
cdc29364 CC |
2053 | Output_section* os = this->ibase_->output_section(sect.output_shndx); |
2054 | gold_assert(os != NULL); | |
2055 | out_sections[i] = os; | |
6fa2a40b | 2056 | this->section_offsets()[i] = static_cast<Address>(sect.sh_offset); |
c1027032 CC |
2057 | |
2058 | // When generating a .gdb_index section, we do additional | |
2059 | // processing of .debug_info and .debug_types sections after all | |
2060 | // the other sections. | |
2061 | if (parameters->options().gdb_index()) | |
2062 | { | |
2063 | const char* name = os->name(); | |
2064 | if (strcmp(name, ".debug_info") == 0) | |
2065 | debug_info_sections.push_back(i); | |
2066 | else if (strcmp(name, ".debug_types") == 0) | |
2067 | debug_types_sections.push_back(i); | |
2068 | } | |
cdc29364 | 2069 | } |
89d8a36b CC |
2070 | |
2071 | // Process the COMDAT groups. | |
2072 | unsigned int ncomdat = this->input_reader_.get_comdat_group_count(); | |
2073 | for (unsigned int i = 0; i < ncomdat; i++) | |
2074 | { | |
2075 | const char* signature = this->input_reader_.get_comdat_group_signature(i); | |
2076 | if (signature == NULL || signature[0] == '\0') | |
2e702c99 | 2077 | this->error(_("COMDAT group has no signature")); |
89d8a36b CC |
2078 | bool keep = layout->find_or_add_kept_section(signature, this, i, true, |
2079 | true, NULL); | |
1206d0d5 CC |
2080 | if (keep) |
2081 | incremental_inputs->report_comdat_group(this, signature); | |
2082 | else | |
2e702c99 | 2083 | this->error(_("COMDAT group %s included twice in incremental link"), |
89d8a36b CC |
2084 | signature); |
2085 | } | |
c1027032 CC |
2086 | |
2087 | // When building a .gdb_index section, scan the .debug_info and | |
2088 | // .debug_types sections. | |
2089 | for (std::vector<unsigned int>::const_iterator p | |
2090 | = debug_info_sections.begin(); | |
2091 | p != debug_info_sections.end(); | |
2092 | ++p) | |
2093 | { | |
2094 | unsigned int i = *p; | |
2095 | layout->add_to_gdb_index(false, this, NULL, 0, i, 0, 0); | |
2096 | } | |
2097 | for (std::vector<unsigned int>::const_iterator p | |
2098 | = debug_types_sections.begin(); | |
2099 | p != debug_types_sections.end(); | |
2100 | ++p) | |
2101 | { | |
2102 | unsigned int i = *p; | |
2103 | layout->add_to_gdb_index(true, this, 0, 0, i, 0, 0); | |
2104 | } | |
cdc29364 CC |
2105 | } |
2106 | ||
2107 | // Layout sections whose layout was deferred while waiting for | |
2108 | // input files from a plugin. | |
2109 | template<int size, bool big_endian> | |
2110 | void | |
6fa2a40b | 2111 | Sized_relobj_incr<size, big_endian>::do_layout_deferred_sections(Layout*) |
cdc29364 CC |
2112 | { |
2113 | } | |
2114 | ||
2115 | // Add the symbols to the symbol table. | |
2116 | ||
2117 | template<int size, bool big_endian> | |
2118 | void | |
6fa2a40b | 2119 | Sized_relobj_incr<size, big_endian>::do_add_symbols( |
cdc29364 CC |
2120 | Symbol_table* symtab, |
2121 | Read_symbols_data*, | |
2122 | Layout*) | |
2123 | { | |
2124 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2125 | unsigned char symbuf[sym_size]; | |
2126 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
2127 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
2128 | ||
2129 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
2130 | ||
2131 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); | |
2132 | this->symbols_.resize(nsyms); | |
2133 | ||
2134 | Incremental_binary::View symtab_view(NULL); | |
2135 | unsigned int symtab_count; | |
2136 | elfcpp::Elf_strtab strtab(NULL, 0); | |
2137 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
2138 | ||
94a3fc8b CC |
2139 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
2140 | unsigned int isym_count = isymtab.symbol_count(); | |
2141 | unsigned int first_global = symtab_count - isym_count; | |
cdc29364 | 2142 | |
f0f9babf | 2143 | const unsigned char* sym_p; |
cdc29364 CC |
2144 | for (unsigned int i = 0; i < nsyms; ++i) |
2145 | { | |
2146 | Incremental_global_symbol_reader<big_endian> info = | |
2147 | this->input_reader_.get_global_symbol_reader(i); | |
94a3fc8b CC |
2148 | unsigned int output_symndx = info.output_symndx(); |
2149 | sym_p = symtab_view.data() + output_symndx * sym_size; | |
cdc29364 CC |
2150 | elfcpp::Sym<size, big_endian> gsym(sym_p); |
2151 | const char* name; | |
2152 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) | |
2153 | name = ""; | |
2154 | ||
11e361bc | 2155 | typename elfcpp::Elf_types<size>::Elf_Addr v = gsym.get_st_value(); |
cdc29364 CC |
2156 | unsigned int shndx = gsym.get_st_shndx(); |
2157 | elfcpp::STB st_bind = gsym.get_st_bind(); | |
2158 | elfcpp::STT st_type = gsym.get_st_type(); | |
2159 | ||
2160 | // Local hidden symbols start out as globals, but get converted to | |
2161 | // to local during output. | |
2162 | if (st_bind == elfcpp::STB_LOCAL) | |
2e702c99 | 2163 | st_bind = elfcpp::STB_GLOBAL; |
cdc29364 CC |
2164 | |
2165 | unsigned int input_shndx = info.shndx(); | |
5146f448 | 2166 | if (input_shndx == 0 || input_shndx == -1U) |
cdc29364 CC |
2167 | { |
2168 | shndx = elfcpp::SHN_UNDEF; | |
2169 | v = 0; | |
2170 | } | |
2171 | else if (shndx != elfcpp::SHN_ABS) | |
2172 | { | |
2173 | // Find the input section and calculate the section-relative value. | |
2174 | gold_assert(shndx != elfcpp::SHN_UNDEF); | |
cdc29364 CC |
2175 | Output_section* os = this->ibase_->output_section(shndx); |
2176 | gold_assert(os != NULL && os->has_fixed_layout()); | |
2177 | typename Input_entry_reader::Input_section_info sect = | |
2178 | this->input_reader_.get_input_section(input_shndx - 1); | |
2179 | gold_assert(sect.output_shndx == shndx); | |
2180 | if (st_type != elfcpp::STT_TLS) | |
2181 | v -= os->address(); | |
2182 | v -= sect.sh_offset; | |
2183 | shndx = input_shndx; | |
2184 | } | |
2185 | ||
2186 | osym.put_st_name(0); | |
2187 | osym.put_st_value(v); | |
2188 | osym.put_st_size(gsym.get_st_size()); | |
2189 | osym.put_st_info(st_bind, st_type); | |
2190 | osym.put_st_other(gsym.get_st_other()); | |
2191 | osym.put_st_shndx(shndx); | |
2192 | ||
5146f448 CC |
2193 | Symbol* res = symtab->add_from_incrobj(this, name, NULL, &sym); |
2194 | ||
53bbcc1b | 2195 | if (shndx != elfcpp::SHN_UNDEF) |
2e702c99 | 2196 | ++this->defined_count_; |
53bbcc1b | 2197 | |
5146f448 CC |
2198 | // If this is a linker-defined symbol that hasn't yet been defined, |
2199 | // define it now. | |
2200 | if (input_shndx == -1U && !res->is_defined()) | |
2201 | { | |
2202 | shndx = gsym.get_st_shndx(); | |
2203 | v = gsym.get_st_value(); | |
2204 | Elf_size_type symsize = gsym.get_st_size(); | |
2205 | if (shndx == elfcpp::SHN_ABS) | |
2206 | { | |
2207 | symtab->define_as_constant(name, NULL, | |
2208 | Symbol_table::INCREMENTAL_BASE, | |
2209 | v, symsize, st_type, st_bind, | |
2210 | gsym.get_st_visibility(), 0, | |
2211 | false, false); | |
2212 | } | |
2213 | else | |
2214 | { | |
2215 | Output_section* os = this->ibase_->output_section(shndx); | |
2216 | gold_assert(os != NULL && os->has_fixed_layout()); | |
2217 | v -= os->address(); | |
2218 | if (symsize > 0) | |
2219 | os->reserve(v, symsize); | |
2220 | symtab->define_in_output_data(name, NULL, | |
2221 | Symbol_table::INCREMENTAL_BASE, | |
2222 | os, v, symsize, st_type, st_bind, | |
2223 | gsym.get_st_visibility(), 0, | |
2224 | false, false); | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | this->symbols_[i] = res; | |
2229 | this->ibase_->add_global_symbol(output_symndx - first_global, res); | |
cdc29364 CC |
2230 | } |
2231 | } | |
2232 | ||
2233 | // Return TRUE if we should include this object from an archive library. | |
2234 | ||
2235 | template<int size, bool big_endian> | |
2236 | Archive::Should_include | |
6fa2a40b | 2237 | Sized_relobj_incr<size, big_endian>::do_should_include_member( |
cdc29364 CC |
2238 | Symbol_table*, |
2239 | Layout*, | |
2240 | Read_symbols_data*, | |
2241 | std::string*) | |
2242 | { | |
2243 | gold_unreachable(); | |
2244 | } | |
2245 | ||
2246 | // Iterate over global symbols, calling a visitor class V for each. | |
2247 | ||
2248 | template<int size, bool big_endian> | |
2249 | void | |
6fa2a40b | 2250 | Sized_relobj_incr<size, big_endian>::do_for_all_global_symbols( |
cdc29364 CC |
2251 | Read_symbols_data*, |
2252 | Library_base::Symbol_visitor_base*) | |
2253 | { | |
2254 | // This routine is not used for incremental objects. | |
2255 | } | |
2256 | ||
cdc29364 CC |
2257 | // Get the size of a section. |
2258 | ||
2259 | template<int size, bool big_endian> | |
2260 | uint64_t | |
6fa2a40b | 2261 | Sized_relobj_incr<size, big_endian>::do_section_size(unsigned int) |
cdc29364 CC |
2262 | { |
2263 | gold_unreachable(); | |
2264 | } | |
2265 | ||
c1027032 CC |
2266 | // Get the name of a section. This returns the name of the output |
2267 | // section, because we don't usually track the names of the input | |
2268 | // sections. | |
cdc29364 CC |
2269 | |
2270 | template<int size, bool big_endian> | |
2271 | std::string | |
54674d38 | 2272 | Sized_relobj_incr<size, big_endian>::do_section_name(unsigned int shndx) const |
cdc29364 | 2273 | { |
54674d38 CC |
2274 | const Output_sections& out_sections(this->output_sections()); |
2275 | const Output_section* os = out_sections[shndx]; | |
c1027032 CC |
2276 | if (os == NULL) |
2277 | return NULL; | |
2278 | return os->name(); | |
cdc29364 CC |
2279 | } |
2280 | ||
2281 | // Return a view of the contents of a section. | |
2282 | ||
2283 | template<int size, bool big_endian> | |
c1027032 CC |
2284 | const unsigned char* |
2285 | Sized_relobj_incr<size, big_endian>::do_section_contents( | |
2286 | unsigned int shndx, | |
2287 | section_size_type* plen, | |
2288 | bool) | |
cdc29364 | 2289 | { |
c1027032 CC |
2290 | Output_sections& out_sections(this->output_sections()); |
2291 | Output_section* os = out_sections[shndx]; | |
2292 | gold_assert(os != NULL); | |
2293 | off_t section_offset = os->offset(); | |
2294 | typename Input_entry_reader::Input_section_info sect = | |
2295 | this->input_reader_.get_input_section(shndx - 1); | |
2296 | section_offset += sect.sh_offset; | |
2297 | *plen = sect.sh_size; | |
2298 | return this->ibase_->view(section_offset, sect.sh_size).data(); | |
cdc29364 CC |
2299 | } |
2300 | ||
2301 | // Return section flags. | |
2302 | ||
2303 | template<int size, bool big_endian> | |
2304 | uint64_t | |
6fa2a40b | 2305 | Sized_relobj_incr<size, big_endian>::do_section_flags(unsigned int) |
cdc29364 CC |
2306 | { |
2307 | gold_unreachable(); | |
2308 | } | |
2309 | ||
2310 | // Return section entsize. | |
2311 | ||
2312 | template<int size, bool big_endian> | |
2313 | uint64_t | |
6fa2a40b | 2314 | Sized_relobj_incr<size, big_endian>::do_section_entsize(unsigned int) |
cdc29364 CC |
2315 | { |
2316 | gold_unreachable(); | |
2317 | } | |
2318 | ||
2319 | // Return section address. | |
2320 | ||
2321 | template<int size, bool big_endian> | |
2322 | uint64_t | |
6fa2a40b | 2323 | Sized_relobj_incr<size, big_endian>::do_section_address(unsigned int) |
cdc29364 CC |
2324 | { |
2325 | gold_unreachable(); | |
2326 | } | |
2327 | ||
2328 | // Return section type. | |
2329 | ||
2330 | template<int size, bool big_endian> | |
2331 | unsigned int | |
6fa2a40b | 2332 | Sized_relobj_incr<size, big_endian>::do_section_type(unsigned int) |
cdc29364 CC |
2333 | { |
2334 | gold_unreachable(); | |
2335 | } | |
2336 | ||
2337 | // Return the section link field. | |
2338 | ||
2339 | template<int size, bool big_endian> | |
2340 | unsigned int | |
6fa2a40b | 2341 | Sized_relobj_incr<size, big_endian>::do_section_link(unsigned int) |
cdc29364 CC |
2342 | { |
2343 | gold_unreachable(); | |
2344 | } | |
2345 | ||
2346 | // Return the section link field. | |
2347 | ||
2348 | template<int size, bool big_endian> | |
2349 | unsigned int | |
6fa2a40b | 2350 | Sized_relobj_incr<size, big_endian>::do_section_info(unsigned int) |
cdc29364 CC |
2351 | { |
2352 | gold_unreachable(); | |
2353 | } | |
2354 | ||
2355 | // Return the section alignment. | |
2356 | ||
2357 | template<int size, bool big_endian> | |
2358 | uint64_t | |
6fa2a40b | 2359 | Sized_relobj_incr<size, big_endian>::do_section_addralign(unsigned int) |
cdc29364 CC |
2360 | { |
2361 | gold_unreachable(); | |
2362 | } | |
2363 | ||
2364 | // Return the Xindex structure to use. | |
2365 | ||
2366 | template<int size, bool big_endian> | |
2367 | Xindex* | |
6fa2a40b | 2368 | Sized_relobj_incr<size, big_endian>::do_initialize_xindex() |
cdc29364 CC |
2369 | { |
2370 | gold_unreachable(); | |
2371 | } | |
2372 | ||
2373 | // Get symbol counts. | |
2374 | ||
2375 | template<int size, bool big_endian> | |
2376 | void | |
6fa2a40b | 2377 | Sized_relobj_incr<size, big_endian>::do_get_global_symbol_counts( |
53bbcc1b CC |
2378 | const Symbol_table*, |
2379 | size_t* defined, | |
2380 | size_t* used) const | |
2381 | { | |
2382 | *defined = this->defined_count_; | |
2383 | size_t count = 0; | |
2384 | for (typename Symbols::const_iterator p = this->symbols_.begin(); | |
2385 | p != this->symbols_.end(); | |
2386 | ++p) | |
2387 | if (*p != NULL | |
2388 | && (*p)->source() == Symbol::FROM_OBJECT | |
2389 | && (*p)->object() == this | |
2390 | && (*p)->is_defined()) | |
2391 | ++count; | |
2392 | *used = count; | |
cdc29364 CC |
2393 | } |
2394 | ||
2395 | // Read the relocs. | |
2396 | ||
2397 | template<int size, bool big_endian> | |
2398 | void | |
6fa2a40b | 2399 | Sized_relobj_incr<size, big_endian>::do_read_relocs(Read_relocs_data*) |
cdc29364 CC |
2400 | { |
2401 | } | |
2402 | ||
2403 | // Process the relocs to find list of referenced sections. Used only | |
2404 | // during garbage collection. | |
2405 | ||
2406 | template<int size, bool big_endian> | |
2407 | void | |
6fa2a40b | 2408 | Sized_relobj_incr<size, big_endian>::do_gc_process_relocs(Symbol_table*, |
cdc29364 CC |
2409 | Layout*, |
2410 | Read_relocs_data*) | |
2411 | { | |
2412 | gold_unreachable(); | |
2413 | } | |
2414 | ||
2415 | // Scan the relocs and adjust the symbol table. | |
2416 | ||
2417 | template<int size, bool big_endian> | |
2418 | void | |
6fa2a40b | 2419 | Sized_relobj_incr<size, big_endian>::do_scan_relocs(Symbol_table*, |
cdc29364 CC |
2420 | Layout* layout, |
2421 | Read_relocs_data*) | |
2422 | { | |
2423 | // Count the incremental relocations for this object. | |
2424 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); | |
2425 | this->allocate_incremental_reloc_counts(); | |
2426 | for (unsigned int i = 0; i < nsyms; i++) | |
2427 | { | |
2428 | Incremental_global_symbol_reader<big_endian> sym = | |
2429 | this->input_reader_.get_global_symbol_reader(i); | |
2430 | unsigned int reloc_count = sym.reloc_count(); | |
2431 | if (reloc_count > 0 && this->incr_reloc_offset_ == -1U) | |
2432 | this->incr_reloc_offset_ = sym.reloc_offset(); | |
2433 | this->incr_reloc_count_ += reloc_count; | |
2434 | for (unsigned int j = 0; j < reloc_count; j++) | |
2435 | this->count_incremental_reloc(i); | |
2436 | } | |
2437 | this->incr_reloc_output_index_ = | |
2438 | layout->incremental_inputs()->get_reloc_count(); | |
2439 | this->finalize_incremental_relocs(layout, false); | |
2440 | ||
2441 | // The incoming incremental relocations may not end up in the same | |
2442 | // location after the incremental update, because the incremental info | |
2443 | // is regenerated in each link. Because the new location may overlap | |
2444 | // with other data in the updated output file, we need to copy the | |
2445 | // relocations into a buffer so that we can still read them safely | |
2446 | // after we start writing updates to the output file. | |
2447 | if (this->incr_reloc_count_ > 0) | |
2448 | { | |
2449 | const Incremental_relocs_reader<size, big_endian>& relocs_reader = | |
2450 | this->ibase_->relocs_reader(); | |
2451 | const unsigned int incr_reloc_size = relocs_reader.reloc_size; | |
2452 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; | |
2453 | this->incr_relocs_ = new unsigned char[len]; | |
2454 | memcpy(this->incr_relocs_, | |
2455 | relocs_reader.data(this->incr_reloc_offset_), | |
2456 | len); | |
2457 | } | |
2458 | } | |
2459 | ||
2460 | // Count the local symbols. | |
2461 | ||
2462 | template<int size, bool big_endian> | |
2463 | void | |
6fa2a40b | 2464 | Sized_relobj_incr<size, big_endian>::do_count_local_symbols( |
f0f9babf | 2465 | Stringpool_template<char>* pool, |
cdc29364 CC |
2466 | Stringpool_template<char>*) |
2467 | { | |
f0f9babf CC |
2468 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
2469 | ||
2470 | // Set the count of local symbols based on the incremental info. | |
2471 | unsigned int nlocals = this->input_reader_.get_local_symbol_count(); | |
2472 | this->local_symbol_count_ = nlocals; | |
2473 | this->local_symbols_.reserve(nlocals); | |
2474 | ||
2475 | // Get views of the base file's symbol table and string table. | |
2476 | Incremental_binary::View symtab_view(NULL); | |
2477 | unsigned int symtab_count; | |
2478 | elfcpp::Elf_strtab strtab(NULL, 0); | |
2479 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
2480 | ||
2481 | // Read the local symbols from the base file's symbol table. | |
2482 | off_t off = this->input_reader_.get_local_symbol_offset(); | |
2483 | const unsigned char* symp = symtab_view.data() + off; | |
2484 | for (unsigned int i = 0; i < nlocals; ++i, symp += sym_size) | |
2485 | { | |
2486 | elfcpp::Sym<size, big_endian> sym(symp); | |
2487 | const char* name; | |
2488 | if (!strtab.get_c_string(sym.get_st_name(), &name)) | |
2e702c99 | 2489 | name = ""; |
f0f9babf CC |
2490 | gold_debug(DEBUG_INCREMENTAL, "Local symbol %d: %s", i, name); |
2491 | name = pool->add(name, true, NULL); | |
2492 | this->local_symbols_.push_back(Local_symbol(name, | |
2493 | sym.get_st_value(), | |
2494 | sym.get_st_size(), | |
2495 | sym.get_st_shndx(), | |
2496 | sym.get_st_type(), | |
2497 | false)); | |
2498 | } | |
cdc29364 CC |
2499 | } |
2500 | ||
2501 | // Finalize the local symbols. | |
2502 | ||
2503 | template<int size, bool big_endian> | |
2504 | unsigned int | |
6fa2a40b | 2505 | Sized_relobj_incr<size, big_endian>::do_finalize_local_symbols( |
cdc29364 | 2506 | unsigned int index, |
f0f9babf | 2507 | off_t off, |
cdc29364 CC |
2508 | Symbol_table*) |
2509 | { | |
f0f9babf CC |
2510 | this->local_symbol_index_ = index; |
2511 | this->local_symbol_offset_ = off; | |
2512 | return index + this->local_symbol_count_; | |
cdc29364 CC |
2513 | } |
2514 | ||
2515 | // Set the offset where local dynamic symbol information will be stored. | |
2516 | ||
2517 | template<int size, bool big_endian> | |
2518 | unsigned int | |
6fa2a40b | 2519 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_indexes( |
cdc29364 CC |
2520 | unsigned int index) |
2521 | { | |
2522 | // FIXME: set local dynsym indexes. | |
2523 | return index; | |
2524 | } | |
2525 | ||
2526 | // Set the offset where local dynamic symbol information will be stored. | |
2527 | ||
2528 | template<int size, bool big_endian> | |
2529 | unsigned int | |
6fa2a40b | 2530 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_offset(off_t) |
cdc29364 CC |
2531 | { |
2532 | return 0; | |
2533 | } | |
2534 | ||
2535 | // Relocate the input sections and write out the local symbols. | |
2536 | // We don't actually do any relocation here. For unchanged input files, | |
2537 | // we reapply relocations only for symbols that have changed; that happens | |
2538 | // in queue_final_tasks. We do need to rewrite the incremental relocations | |
2539 | // for this object. | |
2540 | ||
2541 | template<int size, bool big_endian> | |
2542 | void | |
6fa2a40b | 2543 | Sized_relobj_incr<size, big_endian>::do_relocate(const Symbol_table*, |
cdc29364 CC |
2544 | const Layout* layout, |
2545 | Output_file* of) | |
2546 | { | |
2547 | if (this->incr_reloc_count_ == 0) | |
2548 | return; | |
2549 | ||
2550 | const unsigned int incr_reloc_size = | |
2551 | Incremental_relocs_reader<size, big_endian>::reloc_size; | |
2552 | ||
2553 | // Get a view for the .gnu_incremental_relocs section. | |
2554 | Incremental_inputs* inputs = layout->incremental_inputs(); | |
2555 | gold_assert(inputs != NULL); | |
2556 | const off_t relocs_off = inputs->relocs_section()->offset(); | |
2557 | const off_t relocs_size = inputs->relocs_section()->data_size(); | |
2558 | unsigned char* const view = of->get_output_view(relocs_off, relocs_size); | |
2559 | ||
2560 | // Copy the relocations from the buffer. | |
2561 | off_t off = this->incr_reloc_output_index_ * incr_reloc_size; | |
2562 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; | |
2563 | memcpy(view + off, this->incr_relocs_, len); | |
94a3fc8b CC |
2564 | |
2565 | // The output section table may have changed, so we need to map | |
2566 | // the old section index to the new section index for each relocation. | |
2567 | for (unsigned int i = 0; i < this->incr_reloc_count_; ++i) | |
2568 | { | |
2569 | unsigned char* pov = view + off + i * incr_reloc_size; | |
2570 | unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(pov + 4); | |
2571 | Output_section* os = this->ibase_->output_section(shndx); | |
2572 | gold_assert(os != NULL); | |
2573 | shndx = os->out_shndx(); | |
2574 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, shndx); | |
2575 | } | |
2576 | ||
cdc29364 | 2577 | of->write_output_view(off, len, view); |
f0f9babf CC |
2578 | |
2579 | // Get views into the output file for the portions of the symbol table | |
2580 | // and the dynamic symbol table that we will be writing. | |
2581 | off_t symtab_off = layout->symtab_section()->offset(); | |
2582 | off_t output_size = this->local_symbol_count_ * This::sym_size; | |
2583 | unsigned char* oview = NULL; | |
2584 | if (output_size > 0) | |
2585 | oview = of->get_output_view(symtab_off + this->local_symbol_offset_, | |
2586 | output_size); | |
2587 | ||
2588 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; | |
2589 | unsigned char* dyn_oview = NULL; | |
2590 | if (dyn_output_size > 0) | |
2591 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
2e702c99 | 2592 | dyn_output_size); |
f0f9babf CC |
2593 | |
2594 | // Write the local symbols. | |
2595 | unsigned char* ov = oview; | |
2596 | unsigned char* dyn_ov = dyn_oview; | |
2597 | const Stringpool* sympool = layout->sympool(); | |
2598 | const Stringpool* dynpool = layout->dynpool(); | |
2599 | Output_symtab_xindex* symtab_xindex = layout->symtab_xindex(); | |
2600 | Output_symtab_xindex* dynsym_xindex = layout->dynsym_xindex(); | |
2601 | for (unsigned int i = 0; i < this->local_symbol_count_; ++i) | |
2602 | { | |
2603 | Local_symbol& lsym(this->local_symbols_[i]); | |
2604 | ||
2605 | bool is_ordinary; | |
2606 | unsigned int st_shndx = this->adjust_sym_shndx(i, lsym.st_shndx, | |
2607 | &is_ordinary); | |
2608 | if (is_ordinary) | |
2609 | { | |
2610 | Output_section* os = this->ibase_->output_section(st_shndx); | |
2611 | st_shndx = os->out_shndx(); | |
2612 | if (st_shndx >= elfcpp::SHN_LORESERVE) | |
2613 | { | |
2614 | symtab_xindex->add(this->local_symbol_index_ + i, st_shndx); | |
2615 | if (lsym.needs_dynsym_entry) | |
2616 | dynsym_xindex->add(lsym.output_dynsym_index, st_shndx); | |
2617 | st_shndx = elfcpp::SHN_XINDEX; | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | // Write the symbol to the output symbol table. | |
2622 | { | |
2623 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
2624 | osym.put_st_name(sympool->get_offset(lsym.name)); | |
2625 | osym.put_st_value(lsym.st_value); | |
2626 | osym.put_st_size(lsym.st_size); | |
2627 | osym.put_st_info(elfcpp::STB_LOCAL, | |
2628 | static_cast<elfcpp::STT>(lsym.st_type)); | |
2629 | osym.put_st_other(0); | |
2630 | osym.put_st_shndx(st_shndx); | |
2631 | ov += sym_size; | |
2632 | } | |
2633 | ||
2634 | // Write the symbol to the output dynamic symbol table. | |
2635 | if (lsym.needs_dynsym_entry) | |
2e702c99 RM |
2636 | { |
2637 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
2638 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
2639 | osym.put_st_name(dynpool->get_offset(lsym.name)); | |
2640 | osym.put_st_value(lsym.st_value); | |
2641 | osym.put_st_size(lsym.st_size); | |
f0f9babf CC |
2642 | osym.put_st_info(elfcpp::STB_LOCAL, |
2643 | static_cast<elfcpp::STT>(lsym.st_type)); | |
2e702c99 RM |
2644 | osym.put_st_other(0); |
2645 | osym.put_st_shndx(st_shndx); | |
2646 | dyn_ov += sym_size; | |
2647 | } | |
f0f9babf CC |
2648 | } |
2649 | ||
2650 | if (output_size > 0) | |
2651 | { | |
2652 | gold_assert(ov - oview == output_size); | |
2653 | of->write_output_view(symtab_off + this->local_symbol_offset_, | |
2654 | output_size, oview); | |
2655 | } | |
2656 | ||
2657 | if (dyn_output_size > 0) | |
2658 | { | |
2659 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
2660 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
2e702c99 | 2661 | dyn_oview); |
f0f9babf | 2662 | } |
cdc29364 CC |
2663 | } |
2664 | ||
2665 | // Set the offset of a section. | |
2666 | ||
2667 | template<int size, bool big_endian> | |
2668 | void | |
6fa2a40b | 2669 | Sized_relobj_incr<size, big_endian>::do_set_section_offset(unsigned int, |
cdc29364 CC |
2670 | uint64_t) |
2671 | { | |
2672 | } | |
2673 | ||
2674 | // Class Sized_incr_dynobj. Most of these methods are not used for | |
2675 | // Incremental objects, but are required to be implemented by the | |
2676 | // base class Object. | |
2677 | ||
2678 | template<int size, bool big_endian> | |
2679 | Sized_incr_dynobj<size, big_endian>::Sized_incr_dynobj( | |
2680 | const std::string& name, | |
2681 | Sized_incremental_binary<size, big_endian>* ibase, | |
2682 | unsigned int input_file_index) | |
2683 | : Dynobj(name, NULL), ibase_(ibase), | |
2684 | input_file_index_(input_file_index), | |
2685 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), | |
53bbcc1b | 2686 | symbols_(), defined_count_(0) |
cdc29364 CC |
2687 | { |
2688 | if (this->input_reader_.is_in_system_directory()) | |
2689 | this->set_is_in_system_directory(); | |
0f1c85a6 CC |
2690 | if (this->input_reader_.as_needed()) |
2691 | this->set_as_needed(); | |
2692 | this->set_soname_string(this->input_reader_.get_soname()); | |
cdc29364 CC |
2693 | this->set_shnum(0); |
2694 | } | |
2695 | ||
2696 | // Read the symbols. | |
2697 | ||
2698 | template<int size, bool big_endian> | |
2699 | void | |
2700 | Sized_incr_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
2701 | { | |
2702 | gold_unreachable(); | |
2703 | } | |
2704 | ||
2705 | // Lay out the input sections. | |
2706 | ||
2707 | template<int size, bool big_endian> | |
2708 | void | |
2709 | Sized_incr_dynobj<size, big_endian>::do_layout( | |
2710 | Symbol_table*, | |
2711 | Layout*, | |
2712 | Read_symbols_data*) | |
2713 | { | |
2714 | } | |
2715 | ||
2716 | // Add the symbols to the symbol table. | |
2717 | ||
2718 | template<int size, bool big_endian> | |
2719 | void | |
2720 | Sized_incr_dynobj<size, big_endian>::do_add_symbols( | |
2721 | Symbol_table* symtab, | |
2722 | Read_symbols_data*, | |
2723 | Layout*) | |
2724 | { | |
2725 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2726 | unsigned char symbuf[sym_size]; | |
2727 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
2728 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
2729 | ||
cdc29364 CC |
2730 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); |
2731 | this->symbols_.resize(nsyms); | |
2732 | ||
2733 | Incremental_binary::View symtab_view(NULL); | |
2734 | unsigned int symtab_count; | |
2735 | elfcpp::Elf_strtab strtab(NULL, 0); | |
2736 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
2737 | ||
94a3fc8b CC |
2738 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
2739 | unsigned int isym_count = isymtab.symbol_count(); | |
2740 | unsigned int first_global = symtab_count - isym_count; | |
cdc29364 | 2741 | |
26d3c67d CC |
2742 | // We keep a set of symbols that we have generated COPY relocations |
2743 | // for, indexed by the symbol value. We do not need more than one | |
2744 | // COPY relocation per address. | |
2745 | typedef typename std::set<Address> Copied_symbols; | |
2746 | Copied_symbols copied_symbols; | |
2747 | ||
f0f9babf | 2748 | const unsigned char* sym_p; |
cdc29364 CC |
2749 | for (unsigned int i = 0; i < nsyms; ++i) |
2750 | { | |
2751 | bool is_def; | |
26d3c67d | 2752 | bool is_copy; |
cdc29364 | 2753 | unsigned int output_symndx = |
26d3c67d | 2754 | this->input_reader_.get_output_symbol_index(i, &is_def, &is_copy); |
cdc29364 CC |
2755 | sym_p = symtab_view.data() + output_symndx * sym_size; |
2756 | elfcpp::Sym<size, big_endian> gsym(sym_p); | |
2757 | const char* name; | |
2758 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) | |
2759 | name = ""; | |
2760 | ||
26d3c67d | 2761 | Address v; |
cdc29364 CC |
2762 | unsigned int shndx; |
2763 | elfcpp::STB st_bind = gsym.get_st_bind(); | |
2764 | elfcpp::STT st_type = gsym.get_st_type(); | |
2765 | ||
2766 | // Local hidden symbols start out as globals, but get converted to | |
2767 | // to local during output. | |
2768 | if (st_bind == elfcpp::STB_LOCAL) | |
2e702c99 | 2769 | st_bind = elfcpp::STB_GLOBAL; |
cdc29364 CC |
2770 | |
2771 | if (!is_def) | |
2772 | { | |
2773 | shndx = elfcpp::SHN_UNDEF; | |
2774 | v = 0; | |
2775 | } | |
2776 | else | |
2777 | { | |
2778 | // For a symbol defined in a shared object, the section index | |
2779 | // is meaningless, as long as it's not SHN_UNDEF. | |
2780 | shndx = 1; | |
2781 | v = gsym.get_st_value(); | |
53bbcc1b | 2782 | ++this->defined_count_; |
cdc29364 CC |
2783 | } |
2784 | ||
2785 | osym.put_st_name(0); | |
2786 | osym.put_st_value(v); | |
2787 | osym.put_st_size(gsym.get_st_size()); | |
2788 | osym.put_st_info(st_bind, st_type); | |
2789 | osym.put_st_other(gsym.get_st_other()); | |
2790 | osym.put_st_shndx(shndx); | |
2791 | ||
26d3c67d CC |
2792 | Sized_symbol<size>* res = |
2793 | symtab->add_from_incrobj<size, big_endian>(this, name, NULL, &sym); | |
2794 | this->symbols_[i] = res; | |
94a3fc8b CC |
2795 | this->ibase_->add_global_symbol(output_symndx - first_global, |
2796 | this->symbols_[i]); | |
26d3c67d CC |
2797 | |
2798 | if (is_copy) | |
2799 | { | |
2800 | std::pair<typename Copied_symbols::iterator, bool> ins = | |
2801 | copied_symbols.insert(v); | |
2802 | if (ins.second) | |
2803 | { | |
2804 | unsigned int shndx = gsym.get_st_shndx(); | |
2805 | Output_section* os = this->ibase_->output_section(shndx); | |
2806 | off_t offset = v - os->address(); | |
2807 | this->ibase_->add_copy_reloc(this->symbols_[i], os, offset); | |
2808 | } | |
2809 | } | |
cdc29364 CC |
2810 | } |
2811 | } | |
2812 | ||
2813 | // Return TRUE if we should include this object from an archive library. | |
2814 | ||
2815 | template<int size, bool big_endian> | |
2816 | Archive::Should_include | |
2817 | Sized_incr_dynobj<size, big_endian>::do_should_include_member( | |
2818 | Symbol_table*, | |
2819 | Layout*, | |
2820 | Read_symbols_data*, | |
2821 | std::string*) | |
2822 | { | |
2823 | gold_unreachable(); | |
2824 | } | |
2825 | ||
2826 | // Iterate over global symbols, calling a visitor class V for each. | |
2827 | ||
2828 | template<int size, bool big_endian> | |
2829 | void | |
2830 | Sized_incr_dynobj<size, big_endian>::do_for_all_global_symbols( | |
2831 | Read_symbols_data*, | |
2832 | Library_base::Symbol_visitor_base*) | |
2833 | { | |
2834 | // This routine is not used for dynamic libraries. | |
2835 | } | |
2836 | ||
2837 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
2838 | // associated with a local symbol. | |
2839 | ||
2840 | template<int size, bool big_endian> | |
2841 | void | |
2842 | Sized_incr_dynobj<size, big_endian>::do_for_all_local_got_entries( | |
2843 | Got_offset_list::Visitor*) const | |
2844 | { | |
cdc29364 CC |
2845 | } |
2846 | ||
2847 | // Get the size of a section. | |
2848 | ||
2849 | template<int size, bool big_endian> | |
2850 | uint64_t | |
2851 | Sized_incr_dynobj<size, big_endian>::do_section_size(unsigned int) | |
2852 | { | |
2853 | gold_unreachable(); | |
2854 | } | |
2855 | ||
2856 | // Get the name of a section. | |
2857 | ||
2858 | template<int size, bool big_endian> | |
2859 | std::string | |
54674d38 | 2860 | Sized_incr_dynobj<size, big_endian>::do_section_name(unsigned int) const |
cdc29364 CC |
2861 | { |
2862 | gold_unreachable(); | |
2863 | } | |
2864 | ||
2865 | // Return a view of the contents of a section. | |
2866 | ||
2867 | template<int size, bool big_endian> | |
c1027032 CC |
2868 | const unsigned char* |
2869 | Sized_incr_dynobj<size, big_endian>::do_section_contents( | |
2870 | unsigned int, | |
2871 | section_size_type*, | |
2872 | bool) | |
cdc29364 CC |
2873 | { |
2874 | gold_unreachable(); | |
2875 | } | |
2876 | ||
2877 | // Return section flags. | |
2878 | ||
2879 | template<int size, bool big_endian> | |
2880 | uint64_t | |
2881 | Sized_incr_dynobj<size, big_endian>::do_section_flags(unsigned int) | |
2882 | { | |
2883 | gold_unreachable(); | |
2884 | } | |
2885 | ||
2886 | // Return section entsize. | |
2887 | ||
2888 | template<int size, bool big_endian> | |
2889 | uint64_t | |
2890 | Sized_incr_dynobj<size, big_endian>::do_section_entsize(unsigned int) | |
2891 | { | |
2892 | gold_unreachable(); | |
2893 | } | |
2894 | ||
2895 | // Return section address. | |
2896 | ||
2897 | template<int size, bool big_endian> | |
2898 | uint64_t | |
2899 | Sized_incr_dynobj<size, big_endian>::do_section_address(unsigned int) | |
2900 | { | |
2901 | gold_unreachable(); | |
2902 | } | |
2903 | ||
2904 | // Return section type. | |
2905 | ||
2906 | template<int size, bool big_endian> | |
2907 | unsigned int | |
2908 | Sized_incr_dynobj<size, big_endian>::do_section_type(unsigned int) | |
2909 | { | |
2910 | gold_unreachable(); | |
2911 | } | |
2912 | ||
2913 | // Return the section link field. | |
2914 | ||
2915 | template<int size, bool big_endian> | |
2916 | unsigned int | |
2917 | Sized_incr_dynobj<size, big_endian>::do_section_link(unsigned int) | |
2918 | { | |
2919 | gold_unreachable(); | |
2920 | } | |
2921 | ||
2922 | // Return the section link field. | |
2923 | ||
2924 | template<int size, bool big_endian> | |
2925 | unsigned int | |
2926 | Sized_incr_dynobj<size, big_endian>::do_section_info(unsigned int) | |
2927 | { | |
2928 | gold_unreachable(); | |
2929 | } | |
2930 | ||
2931 | // Return the section alignment. | |
2932 | ||
2933 | template<int size, bool big_endian> | |
2934 | uint64_t | |
2935 | Sized_incr_dynobj<size, big_endian>::do_section_addralign(unsigned int) | |
2936 | { | |
2937 | gold_unreachable(); | |
2938 | } | |
2939 | ||
2940 | // Return the Xindex structure to use. | |
2941 | ||
2942 | template<int size, bool big_endian> | |
2943 | Xindex* | |
2944 | Sized_incr_dynobj<size, big_endian>::do_initialize_xindex() | |
2945 | { | |
2946 | gold_unreachable(); | |
2947 | } | |
2948 | ||
2949 | // Get symbol counts. | |
2950 | ||
2951 | template<int size, bool big_endian> | |
2952 | void | |
2953 | Sized_incr_dynobj<size, big_endian>::do_get_global_symbol_counts( | |
53bbcc1b CC |
2954 | const Symbol_table*, |
2955 | size_t* defined, | |
2956 | size_t* used) const | |
2957 | { | |
2958 | *defined = this->defined_count_; | |
2959 | size_t count = 0; | |
2960 | for (typename Symbols::const_iterator p = this->symbols_.begin(); | |
2961 | p != this->symbols_.end(); | |
2962 | ++p) | |
2963 | if (*p != NULL | |
2964 | && (*p)->source() == Symbol::FROM_OBJECT | |
2965 | && (*p)->object() == this | |
2966 | && (*p)->is_defined() | |
2967 | && (*p)->dynsym_index() != -1U) | |
2968 | ++count; | |
2969 | *used = count; | |
cdc29364 CC |
2970 | } |
2971 | ||
2972 | // Allocate an incremental object of the appropriate size and endianness. | |
2973 | ||
2974 | Object* | |
2975 | make_sized_incremental_object( | |
2976 | Incremental_binary* ibase, | |
2977 | unsigned int input_file_index, | |
2978 | Incremental_input_type input_type, | |
2979 | const Incremental_binary::Input_reader* input_reader) | |
2980 | { | |
2981 | Object* obj = NULL; | |
2982 | std::string name(input_reader->filename()); | |
2983 | ||
2984 | switch (parameters->size_and_endianness()) | |
2985 | { | |
2986 | #ifdef HAVE_TARGET_32_LITTLE | |
2987 | case Parameters::TARGET_32_LITTLE: | |
2988 | { | |
2989 | Sized_incremental_binary<32, false>* sized_ibase = | |
2990 | static_cast<Sized_incremental_binary<32, false>*>(ibase); | |
2991 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
2992 | obj = new Sized_incr_dynobj<32, false>(name, sized_ibase, | |
2993 | input_file_index); | |
2994 | else | |
6fa2a40b | 2995 | obj = new Sized_relobj_incr<32, false>(name, sized_ibase, |
cdc29364 CC |
2996 | input_file_index); |
2997 | } | |
2998 | break; | |
2999 | #endif | |
3000 | #ifdef HAVE_TARGET_32_BIG | |
3001 | case Parameters::TARGET_32_BIG: | |
3002 | { | |
3003 | Sized_incremental_binary<32, true>* sized_ibase = | |
3004 | static_cast<Sized_incremental_binary<32, true>*>(ibase); | |
3005 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
3006 | obj = new Sized_incr_dynobj<32, true>(name, sized_ibase, | |
3007 | input_file_index); | |
3008 | else | |
6fa2a40b | 3009 | obj = new Sized_relobj_incr<32, true>(name, sized_ibase, |
cdc29364 CC |
3010 | input_file_index); |
3011 | } | |
3012 | break; | |
3013 | #endif | |
3014 | #ifdef HAVE_TARGET_64_LITTLE | |
3015 | case Parameters::TARGET_64_LITTLE: | |
3016 | { | |
3017 | Sized_incremental_binary<64, false>* sized_ibase = | |
3018 | static_cast<Sized_incremental_binary<64, false>*>(ibase); | |
3019 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
3020 | obj = new Sized_incr_dynobj<64, false>(name, sized_ibase, | |
3021 | input_file_index); | |
3022 | else | |
6fa2a40b | 3023 | obj = new Sized_relobj_incr<64, false>(name, sized_ibase, |
cdc29364 CC |
3024 | input_file_index); |
3025 | } | |
3026 | break; | |
3027 | #endif | |
3028 | #ifdef HAVE_TARGET_64_BIG | |
3029 | case Parameters::TARGET_64_BIG: | |
3030 | { | |
3031 | Sized_incremental_binary<64, true>* sized_ibase = | |
3032 | static_cast<Sized_incremental_binary<64, true>*>(ibase); | |
3033 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
3034 | obj = new Sized_incr_dynobj<64, true>(name, sized_ibase, | |
3035 | input_file_index); | |
3036 | else | |
6fa2a40b | 3037 | obj = new Sized_relobj_incr<64, true>(name, sized_ibase, |
cdc29364 CC |
3038 | input_file_index); |
3039 | } | |
3040 | break; | |
3041 | #endif | |
3042 | default: | |
3043 | gold_unreachable(); | |
3044 | } | |
3045 | ||
3046 | gold_assert(obj != NULL); | |
3047 | return obj; | |
3048 | } | |
3049 | ||
3050 | // Copy the unused symbols from the incremental input info. | |
3051 | // We need to do this because we may be overwriting the incremental | |
3052 | // input info in the base file before we write the new incremental | |
3053 | // info. | |
3054 | void | |
3055 | Incremental_library::copy_unused_symbols() | |
3056 | { | |
3057 | unsigned int symcount = this->input_reader_->get_unused_symbol_count(); | |
3058 | this->unused_symbols_.reserve(symcount); | |
3059 | for (unsigned int i = 0; i < symcount; ++i) | |
3060 | { | |
3061 | std::string name(this->input_reader_->get_unused_symbol(i)); | |
3062 | this->unused_symbols_.push_back(name); | |
3063 | } | |
3064 | } | |
3065 | ||
3066 | // Iterator for unused global symbols in the library. | |
3067 | void | |
3068 | Incremental_library::do_for_all_unused_symbols(Symbol_visitor_base* v) const | |
3069 | { | |
3070 | for (Symbol_list::const_iterator p = this->unused_symbols_.begin(); | |
3071 | p != this->unused_symbols_.end(); | |
3072 | ++p) | |
3073 | v->visit(p->c_str()); | |
3074 | } | |
3075 | ||
c549a694 ILT |
3076 | // Instantiate the templates we need. |
3077 | ||
3078 | #ifdef HAVE_TARGET_32_LITTLE | |
3079 | template | |
3080 | class Sized_incremental_binary<32, false>; | |
cdc29364 CC |
3081 | |
3082 | template | |
6fa2a40b | 3083 | class Sized_relobj_incr<32, false>; |
cdc29364 CC |
3084 | |
3085 | template | |
3086 | class Sized_incr_dynobj<32, false>; | |
c549a694 ILT |
3087 | #endif |
3088 | ||
3089 | #ifdef HAVE_TARGET_32_BIG | |
3090 | template | |
3091 | class Sized_incremental_binary<32, true>; | |
cdc29364 CC |
3092 | |
3093 | template | |
6fa2a40b | 3094 | class Sized_relobj_incr<32, true>; |
cdc29364 CC |
3095 | |
3096 | template | |
3097 | class Sized_incr_dynobj<32, true>; | |
c549a694 ILT |
3098 | #endif |
3099 | ||
3100 | #ifdef HAVE_TARGET_64_LITTLE | |
3101 | template | |
3102 | class Sized_incremental_binary<64, false>; | |
cdc29364 CC |
3103 | |
3104 | template | |
6fa2a40b | 3105 | class Sized_relobj_incr<64, false>; |
cdc29364 CC |
3106 | |
3107 | template | |
3108 | class Sized_incr_dynobj<64, false>; | |
c549a694 ILT |
3109 | #endif |
3110 | ||
3111 | #ifdef HAVE_TARGET_64_BIG | |
3112 | template | |
3113 | class Sized_incremental_binary<64, true>; | |
cdc29364 CC |
3114 | |
3115 | template | |
6fa2a40b | 3116 | class Sized_relobj_incr<64, true>; |
cdc29364 CC |
3117 | |
3118 | template | |
3119 | class Sized_incr_dynobj<64, true>; | |
c549a694 ILT |
3120 | #endif |
3121 | ||
0e879927 | 3122 | } // End namespace gold. |