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0e879927 ILT |
1 | // inremental.cc -- incremental linking support for gold |
2 | ||
09ec0418 | 3 | // Copyright 2009, 2010 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 ILT |
24 | |
25 | #include <cstdarg> | |
a81ee015 | 26 | #include "libiberty.h" |
c549a694 | 27 | |
0e879927 | 28 | #include "elfcpp.h" |
cdc29364 | 29 | #include "options.h" |
3ce2c28e | 30 | #include "output.h" |
09ec0418 | 31 | #include "symtab.h" |
3ce2c28e | 32 | #include "incremental.h" |
98fa85cb | 33 | #include "archive.h" |
cdc29364 | 34 | #include "object.h" |
44453f85 | 35 | #include "output.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 | ||
43 | // Version information. Will change frequently during the development, later | |
44 | // we could think about backward (and forward?) compatibility. | |
c4aa1e2d | 45 | const unsigned int INCREMENTAL_LINK_VERSION = 1; |
0e879927 | 46 | |
09ec0418 CC |
47 | // This class manages the .gnu_incremental_inputs section, which holds |
48 | // the header information, a directory of input files, and separate | |
49 | // entries for each input file. | |
50 | ||
51 | template<int size, bool big_endian> | |
52 | class Output_section_incremental_inputs : public Output_section_data | |
53 | { | |
54 | public: | |
55 | Output_section_incremental_inputs(const Incremental_inputs* inputs, | |
56 | const Symbol_table* symtab) | |
57 | : Output_section_data(size / 8), inputs_(inputs), symtab_(symtab) | |
58 | { } | |
59 | ||
60 | protected: | |
cdc29364 CC |
61 | // This is called to update the section size prior to assigning |
62 | // the address and file offset. | |
63 | void | |
64 | update_data_size() | |
65 | { this->set_final_data_size(); } | |
66 | ||
09ec0418 CC |
67 | // Set the final data size. |
68 | void | |
69 | set_final_data_size(); | |
70 | ||
71 | // Write the data to the file. | |
72 | void | |
73 | do_write(Output_file*); | |
74 | ||
75 | // Write to a map file. | |
76 | void | |
77 | do_print_to_mapfile(Mapfile* mapfile) const | |
78 | { mapfile->print_output_data(this, _("** incremental_inputs")); } | |
79 | ||
80 | private: | |
81 | // Write the section header. | |
82 | unsigned char* | |
83 | write_header(unsigned char* pov, unsigned int input_file_count, | |
84 | section_offset_type command_line_offset); | |
85 | ||
86 | // Write the input file entries. | |
87 | unsigned char* | |
88 | write_input_files(unsigned char* oview, unsigned char* pov, | |
89 | Stringpool* strtab); | |
90 | ||
91 | // Write the supplemental information blocks. | |
92 | unsigned char* | |
93 | write_info_blocks(unsigned char* oview, unsigned char* pov, | |
94 | Stringpool* strtab, unsigned int* global_syms, | |
95 | unsigned int global_sym_count); | |
96 | ||
97 | // Write the contents of the .gnu_incremental_symtab section. | |
98 | void | |
99 | write_symtab(unsigned char* pov, unsigned int* global_syms, | |
100 | unsigned int global_sym_count); | |
101 | ||
0e70b911 CC |
102 | // Write the contents of the .gnu_incremental_got_plt section. |
103 | void | |
104 | write_got_plt(unsigned char* pov, off_t view_size); | |
105 | ||
09ec0418 CC |
106 | // Typedefs for writing the data to the output sections. |
107 | typedef elfcpp::Swap<size, big_endian> Swap; | |
108 | typedef elfcpp::Swap<16, big_endian> Swap16; | |
109 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
110 | typedef elfcpp::Swap<64, big_endian> Swap64; | |
111 | ||
112 | // Sizes of various structures. | |
113 | static const int sizeof_addr = size / 8; | |
114 | static const int header_size = 16; | |
115 | static const int input_entry_size = 24; | |
116 | ||
117 | // The Incremental_inputs object. | |
118 | const Incremental_inputs* inputs_; | |
119 | ||
120 | // The symbol table. | |
121 | const Symbol_table* symtab_; | |
122 | }; | |
123 | ||
c549a694 ILT |
124 | // Inform the user why we don't do an incremental link. Not called in |
125 | // the obvious case of missing output file. TODO: Is this helpful? | |
126 | ||
127 | void | |
128 | vexplain_no_incremental(const char* format, va_list args) | |
129 | { | |
130 | char* buf = NULL; | |
131 | if (vasprintf(&buf, format, args) < 0) | |
132 | gold_nomem(); | |
133 | gold_info(_("the link might take longer: " | |
134 | "cannot perform incremental link: %s"), buf); | |
135 | free(buf); | |
136 | } | |
137 | ||
138 | void | |
139 | explain_no_incremental(const char* format, ...) | |
140 | { | |
141 | va_list args; | |
142 | va_start(args, format); | |
143 | vexplain_no_incremental(format, args); | |
144 | va_end(args); | |
145 | } | |
146 | ||
147 | // Report an error. | |
148 | ||
149 | void | |
150 | Incremental_binary::error(const char* format, ...) const | |
151 | { | |
152 | va_list args; | |
153 | va_start(args, format); | |
154 | // Current code only checks if the file can be used for incremental linking, | |
155 | // so errors shouldn't fail the build, but only result in a fallback to a | |
156 | // full build. | |
157 | // TODO: when we implement incremental editing of the file, we may need a | |
158 | // flag that will cause errors to be treated seriously. | |
159 | vexplain_no_incremental(format, args); | |
160 | va_end(args); | |
161 | } | |
162 | ||
09ec0418 CC |
163 | // Find the .gnu_incremental_inputs section and related sections. |
164 | ||
c549a694 ILT |
165 | template<int size, bool big_endian> |
166 | bool | |
b961d0d7 | 167 | Sized_incremental_binary<size, big_endian>::find_incremental_inputs_sections( |
09ec0418 CC |
168 | unsigned int* p_inputs_shndx, |
169 | unsigned int* p_symtab_shndx, | |
170 | unsigned int* p_relocs_shndx, | |
0e70b911 | 171 | unsigned int* p_got_plt_shndx, |
09ec0418 | 172 | unsigned int* p_strtab_shndx) |
c549a694 | 173 | { |
09ec0418 CC |
174 | unsigned int inputs_shndx = |
175 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_INPUTS); | |
176 | if (inputs_shndx == elfcpp::SHN_UNDEF) // Not found. | |
177 | return false; | |
178 | ||
179 | unsigned int symtab_shndx = | |
180 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_SYMTAB); | |
181 | if (symtab_shndx == elfcpp::SHN_UNDEF) // Not found. | |
182 | return false; | |
183 | if (this->elf_file_.section_link(symtab_shndx) != inputs_shndx) | |
c549a694 | 184 | return false; |
09ec0418 CC |
185 | |
186 | unsigned int relocs_shndx = | |
187 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_RELOCS); | |
188 | if (relocs_shndx == elfcpp::SHN_UNDEF) // Not found. | |
189 | return false; | |
190 | if (this->elf_file_.section_link(relocs_shndx) != inputs_shndx) | |
191 | return false; | |
192 | ||
0e70b911 CC |
193 | unsigned int got_plt_shndx = |
194 | this->elf_file_.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_GOT_PLT); | |
195 | if (got_plt_shndx == elfcpp::SHN_UNDEF) // Not found. | |
196 | return false; | |
197 | if (this->elf_file_.section_link(got_plt_shndx) != inputs_shndx) | |
198 | return false; | |
199 | ||
09ec0418 CC |
200 | unsigned int strtab_shndx = this->elf_file_.section_link(inputs_shndx); |
201 | if (strtab_shndx == elfcpp::SHN_UNDEF | |
202 | || strtab_shndx > this->elf_file_.shnum() | |
203 | || this->elf_file_.section_type(strtab_shndx) != elfcpp::SHT_STRTAB) | |
204 | return false; | |
205 | ||
206 | if (p_inputs_shndx != NULL) | |
207 | *p_inputs_shndx = inputs_shndx; | |
208 | if (p_symtab_shndx != NULL) | |
209 | *p_symtab_shndx = symtab_shndx; | |
210 | if (p_relocs_shndx != NULL) | |
211 | *p_relocs_shndx = relocs_shndx; | |
0e70b911 CC |
212 | if (p_got_plt_shndx != NULL) |
213 | *p_got_plt_shndx = got_plt_shndx; | |
09ec0418 CC |
214 | if (p_strtab_shndx != NULL) |
215 | *p_strtab_shndx = strtab_shndx; | |
c549a694 ILT |
216 | return true; |
217 | } | |
218 | ||
b961d0d7 | 219 | // Set up the readers into the incremental info sections. |
09ec0418 | 220 | |
c4aa1e2d | 221 | template<int size, bool big_endian> |
b961d0d7 CC |
222 | void |
223 | Sized_incremental_binary<size, big_endian>::setup_readers() | |
c4aa1e2d | 224 | { |
09ec0418 CC |
225 | unsigned int inputs_shndx; |
226 | unsigned int symtab_shndx; | |
227 | unsigned int relocs_shndx; | |
b961d0d7 | 228 | unsigned int got_plt_shndx; |
c4aa1e2d | 229 | unsigned int strtab_shndx; |
c4aa1e2d | 230 | |
b961d0d7 CC |
231 | if (!this->find_incremental_inputs_sections(&inputs_shndx, &symtab_shndx, |
232 | &relocs_shndx, &got_plt_shndx, | |
233 | &strtab_shndx)) | |
234 | return; | |
c4aa1e2d | 235 | |
09ec0418 CC |
236 | Location inputs_location(this->elf_file_.section_contents(inputs_shndx)); |
237 | Location symtab_location(this->elf_file_.section_contents(symtab_shndx)); | |
238 | Location relocs_location(this->elf_file_.section_contents(relocs_shndx)); | |
b961d0d7 | 239 | Location got_plt_location(this->elf_file_.section_contents(got_plt_shndx)); |
c4aa1e2d | 240 | Location strtab_location(this->elf_file_.section_contents(strtab_shndx)); |
09ec0418 | 241 | |
b961d0d7 CC |
242 | View inputs_view = this->view(inputs_location); |
243 | View symtab_view = this->view(symtab_location); | |
244 | View relocs_view = this->view(relocs_location); | |
245 | View got_plt_view = this->view(got_plt_location); | |
246 | View strtab_view = this->view(strtab_location); | |
09ec0418 | 247 | |
c4aa1e2d | 248 | elfcpp::Elf_strtab strtab(strtab_view.data(), strtab_location.data_size); |
c4aa1e2d | 249 | |
b961d0d7 CC |
250 | this->inputs_reader_ = |
251 | Incremental_inputs_reader<size, big_endian>(inputs_view.data(), strtab); | |
252 | this->symtab_reader_ = | |
253 | Incremental_symtab_reader<big_endian>(symtab_view.data(), | |
254 | symtab_location.data_size); | |
255 | this->relocs_reader_ = | |
256 | Incremental_relocs_reader<size, big_endian>(relocs_view.data(), | |
257 | relocs_location.data_size); | |
258 | this->got_plt_reader_ = | |
259 | Incremental_got_plt_reader<big_endian>(got_plt_view.data()); | |
cdc29364 | 260 | |
4829d394 CC |
261 | // Find the main symbol table. |
262 | unsigned int main_symtab_shndx = | |
263 | this->elf_file_.find_section_by_type(elfcpp::SHT_SYMTAB); | |
264 | gold_assert(main_symtab_shndx != elfcpp::SHN_UNDEF); | |
265 | this->main_symtab_loc_ = this->elf_file_.section_contents(main_symtab_shndx); | |
266 | ||
267 | // Find the main symbol string table. | |
268 | unsigned int main_strtab_shndx = | |
269 | this->elf_file_.section_link(main_symtab_shndx); | |
270 | gold_assert(main_strtab_shndx != elfcpp::SHN_UNDEF | |
271 | && main_strtab_shndx < this->elf_file_.shnum()); | |
272 | this->main_strtab_loc_ = this->elf_file_.section_contents(main_strtab_shndx); | |
273 | ||
cdc29364 CC |
274 | // Walk the list of input files (a) to setup an Input_reader for each |
275 | // input file, and (b) to record maps of files added from archive | |
276 | // libraries and scripts. | |
277 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; | |
278 | unsigned int count = inputs.input_file_count(); | |
6fa2a40b | 279 | this->input_objects_.resize(count); |
cdc29364 CC |
280 | this->input_entry_readers_.reserve(count); |
281 | this->library_map_.resize(count); | |
282 | this->script_map_.resize(count); | |
283 | for (unsigned int i = 0; i < count; i++) | |
284 | { | |
285 | Input_entry_reader input_file = inputs.input_file(i); | |
286 | this->input_entry_readers_.push_back(Sized_input_reader(input_file)); | |
287 | switch (input_file.type()) | |
288 | { | |
289 | case INCREMENTAL_INPUT_OBJECT: | |
290 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
291 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
292 | // No special treatment necessary. | |
293 | break; | |
294 | case INCREMENTAL_INPUT_ARCHIVE: | |
295 | { | |
296 | Incremental_library* lib = | |
297 | new Incremental_library(input_file.filename(), i, | |
298 | &this->input_entry_readers_[i]); | |
299 | this->library_map_[i] = lib; | |
300 | unsigned int member_count = input_file.get_member_count(); | |
301 | for (unsigned int j = 0; j < member_count; j++) | |
302 | { | |
303 | int member_offset = input_file.get_member_offset(j); | |
304 | int member_index = inputs.input_file_index(member_offset); | |
305 | this->library_map_[member_index] = lib; | |
306 | } | |
307 | } | |
308 | break; | |
309 | case INCREMENTAL_INPUT_SCRIPT: | |
310 | { | |
311 | Script_info* script = new Script_info(input_file.filename()); | |
312 | this->script_map_[i] = script; | |
313 | unsigned int object_count = input_file.get_object_count(); | |
314 | for (unsigned int j = 0; j < object_count; j++) | |
315 | { | |
316 | int object_offset = input_file.get_object_offset(j); | |
317 | int object_index = inputs.input_file_index(object_offset); | |
318 | this->script_map_[object_index] = script; | |
319 | } | |
320 | } | |
321 | break; | |
322 | default: | |
323 | gold_unreachable(); | |
324 | } | |
325 | } | |
326 | ||
94a3fc8b CC |
327 | // Initialize the map of global symbols. |
328 | unsigned int nglobals = this->symtab_reader_.symbol_count(); | |
329 | this->symbol_map_.resize(nglobals); | |
330 | ||
b961d0d7 CC |
331 | this->has_incremental_info_ = true; |
332 | } | |
333 | ||
cdc29364 CC |
334 | // Walk the list of input files given on the command line, and build |
335 | // a direct map of file index to the corresponding input argument. | |
336 | ||
337 | void | |
338 | check_input_args(std::vector<const Input_argument*>& input_args_map, | |
339 | Input_arguments::const_iterator begin, | |
340 | Input_arguments::const_iterator end) | |
341 | { | |
342 | for (Input_arguments::const_iterator p = begin; | |
343 | p != end; | |
344 | ++p) | |
345 | { | |
346 | if (p->is_group()) | |
347 | { | |
348 | const Input_file_group* group = p->group(); | |
349 | check_input_args(input_args_map, group->begin(), group->end()); | |
350 | } | |
351 | else if (p->is_lib()) | |
352 | { | |
353 | const Input_file_lib* lib = p->lib(); | |
354 | check_input_args(input_args_map, lib->begin(), lib->end()); | |
355 | } | |
356 | else | |
357 | { | |
358 | gold_assert(p->is_file()); | |
359 | unsigned int arg_serial = p->file().arg_serial(); | |
360 | if (arg_serial > 0) | |
361 | { | |
362 | gold_assert(arg_serial <= input_args_map.size()); | |
363 | gold_assert(input_args_map[arg_serial - 1] == 0); | |
364 | input_args_map[arg_serial - 1] = &*p; | |
365 | } | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
b961d0d7 CC |
370 | // Determine whether an incremental link based on the existing output file |
371 | // can be done. | |
372 | ||
373 | template<int size, bool big_endian> | |
374 | bool | |
375 | Sized_incremental_binary<size, big_endian>::do_check_inputs( | |
cdc29364 | 376 | const Command_line& cmdline, |
b961d0d7 CC |
377 | Incremental_inputs* incremental_inputs) |
378 | { | |
cdc29364 CC |
379 | Incremental_inputs_reader<size, big_endian>& inputs = this->inputs_reader_; |
380 | ||
b961d0d7 CC |
381 | if (!this->has_incremental_info_) |
382 | { | |
383 | explain_no_incremental(_("no incremental data from previous build")); | |
384 | return false; | |
385 | } | |
c4aa1e2d | 386 | |
cdc29364 | 387 | if (inputs.version() != INCREMENTAL_LINK_VERSION) |
c4aa1e2d | 388 | { |
09ec0418 | 389 | explain_no_incremental(_("different version of incremental build data")); |
c4aa1e2d ILT |
390 | return false; |
391 | } | |
392 | ||
cdc29364 | 393 | if (incremental_inputs->command_line() != inputs.command_line()) |
c4aa1e2d ILT |
394 | { |
395 | explain_no_incremental(_("command line changed")); | |
396 | return false; | |
397 | } | |
398 | ||
cdc29364 CC |
399 | // Walk the list of input files given on the command line, and build |
400 | // a direct map of argument serial numbers to the corresponding input | |
401 | // arguments. | |
402 | this->input_args_map_.resize(cmdline.number_of_input_files()); | |
403 | check_input_args(this->input_args_map_, cmdline.begin(), cmdline.end()); | |
404 | ||
405 | // Walk the list of input files to check for conditions that prevent | |
406 | // an incremental update link. | |
407 | unsigned int count = inputs.input_file_count(); | |
408 | for (unsigned int i = 0; i < count; i++) | |
409 | { | |
410 | Input_entry_reader input_file = inputs.input_file(i); | |
411 | switch (input_file.type()) | |
412 | { | |
413 | case INCREMENTAL_INPUT_OBJECT: | |
414 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
415 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
416 | case INCREMENTAL_INPUT_ARCHIVE: | |
417 | // No special treatment necessary. | |
418 | break; | |
419 | case INCREMENTAL_INPUT_SCRIPT: | |
420 | if (this->do_file_has_changed(i)) | |
421 | { | |
422 | explain_no_incremental(_("%s: script file changed"), | |
423 | input_file.filename()); | |
424 | return false; | |
425 | } | |
426 | break; | |
427 | default: | |
428 | gold_unreachable(); | |
429 | } | |
430 | } | |
431 | ||
c4aa1e2d ILT |
432 | return true; |
433 | } | |
434 | ||
cdc29364 | 435 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 CC |
436 | |
437 | template<int size, bool big_endian> | |
438 | bool | |
cdc29364 CC |
439 | Sized_incremental_binary<size, big_endian>::do_file_has_changed( |
440 | unsigned int n) const | |
b961d0d7 | 441 | { |
cdc29364 CC |
442 | Input_entry_reader input_file = this->inputs_reader_.input_file(n); |
443 | Incremental_disposition disp = INCREMENTAL_CHECK; | |
444 | const Input_argument* input_argument = this->get_input_argument(n); | |
445 | if (input_argument != NULL) | |
446 | disp = input_argument->file().options().incremental_disposition(); | |
b961d0d7 CC |
447 | |
448 | if (disp != INCREMENTAL_CHECK) | |
cdc29364 | 449 | return disp == INCREMENTAL_CHANGED; |
b961d0d7 | 450 | |
cdc29364 CC |
451 | const char* filename = input_file.filename(); |
452 | Timespec old_mtime = input_file.get_mtime(); | |
453 | Timespec new_mtime; | |
454 | if (!get_mtime(filename, &new_mtime)) | |
455 | { | |
456 | // If we can't open get the current modification time, assume it has | |
457 | // changed. If the file doesn't exist, we'll issue an error when we | |
458 | // try to open it later. | |
459 | return true; | |
460 | } | |
461 | ||
462 | if (new_mtime.seconds > old_mtime.seconds) | |
463 | return true; | |
464 | if (new_mtime.seconds == old_mtime.seconds | |
465 | && new_mtime.nanoseconds > old_mtime.nanoseconds) | |
466 | return true; | |
b961d0d7 CC |
467 | return false; |
468 | } | |
469 | ||
cdc29364 CC |
470 | // Initialize the layout of the output file based on the existing |
471 | // output file. | |
472 | ||
473 | template<int size, bool big_endian> | |
474 | void | |
475 | Sized_incremental_binary<size, big_endian>::do_init_layout(Layout* layout) | |
476 | { | |
477 | typedef elfcpp::Shdr<size, big_endian> Shdr; | |
478 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
479 | ||
480 | // Get views of the section headers and the section string table. | |
481 | const off_t shoff = this->elf_file_.shoff(); | |
482 | const unsigned int shnum = this->elf_file_.shnum(); | |
483 | const unsigned int shstrndx = this->elf_file_.shstrndx(); | |
484 | Location shdrs_location(shoff, shnum * shdr_size); | |
485 | Location shstrndx_location(this->elf_file_.section_contents(shstrndx)); | |
486 | View shdrs_view = this->view(shdrs_location); | |
487 | View shstrndx_view = this->view(shstrndx_location); | |
488 | elfcpp::Elf_strtab shstrtab(shstrndx_view.data(), | |
489 | shstrndx_location.data_size); | |
490 | ||
491 | layout->set_incremental_base(this); | |
492 | ||
493 | // Initialize the layout. | |
494 | this->section_map_.resize(shnum); | |
495 | const unsigned char* pshdr = shdrs_view.data() + shdr_size; | |
496 | for (unsigned int i = 1; i < shnum; i++) | |
497 | { | |
498 | Shdr shdr(pshdr); | |
499 | const char* name; | |
500 | if (!shstrtab.get_c_string(shdr.get_sh_name(), &name)) | |
501 | name = NULL; | |
502 | gold_debug(DEBUG_INCREMENTAL, | |
503 | "Output section: %2d %08lx %08lx %08lx %3d %s", | |
504 | i, | |
505 | static_cast<long>(shdr.get_sh_addr()), | |
506 | static_cast<long>(shdr.get_sh_offset()), | |
507 | static_cast<long>(shdr.get_sh_size()), | |
508 | shdr.get_sh_type(), name ? name : "<null>"); | |
509 | this->section_map_[i] = layout->init_fixed_output_section(name, shdr); | |
510 | pshdr += shdr_size; | |
511 | } | |
512 | } | |
513 | ||
514 | // Mark regions of the input file that must be kept unchanged. | |
515 | ||
516 | template<int size, bool big_endian> | |
517 | void | |
518 | Sized_incremental_binary<size, big_endian>::do_reserve_layout( | |
519 | unsigned int input_file_index) | |
520 | { | |
521 | Input_entry_reader input_file = | |
522 | this->inputs_reader_.input_file(input_file_index); | |
523 | ||
524 | if (input_file.type() == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
525 | return; | |
526 | ||
527 | unsigned int shnum = input_file.get_input_section_count(); | |
528 | for (unsigned int i = 0; i < shnum; i++) | |
529 | { | |
530 | typename Input_entry_reader::Input_section_info sect = | |
531 | input_file.get_input_section(i); | |
532 | if (sect.output_shndx == 0 || sect.sh_offset == -1) | |
533 | continue; | |
534 | Output_section* os = this->section_map_[sect.output_shndx]; | |
535 | gold_assert(os != NULL); | |
536 | os->reserve(sect.sh_offset, sect.sh_size); | |
537 | } | |
538 | } | |
539 | ||
4829d394 CC |
540 | // Process the GOT and PLT entries from the existing output file. |
541 | ||
542 | template<int size, bool big_endian> | |
543 | void | |
544 | Sized_incremental_binary<size, big_endian>::do_process_got_plt( | |
545 | Symbol_table* symtab, | |
546 | Layout* layout) | |
547 | { | |
548 | Incremental_got_plt_reader<big_endian> got_plt_reader(this->got_plt_reader()); | |
549 | Sized_target<size, big_endian>* target = | |
550 | parameters->sized_target<size, big_endian>(); | |
551 | ||
552 | // Get the number of symbols in the main symbol table and in the | |
553 | // incremental symbol table. The difference between the two counts | |
554 | // is the index of the first forced-local or global symbol in the | |
555 | // main symbol table. | |
556 | unsigned int symtab_count = | |
557 | this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; | |
558 | unsigned int isym_count = this->symtab_reader_.symbol_count(); | |
559 | unsigned int first_global = symtab_count - isym_count; | |
560 | ||
561 | // Tell the target how big the GOT and PLT sections are. | |
562 | unsigned int got_count = got_plt_reader.get_got_entry_count(); | |
563 | unsigned int plt_count = got_plt_reader.get_plt_entry_count(); | |
564 | Output_data_got<size, big_endian>* got = | |
565 | target->init_got_plt_for_update(symtab, layout, got_count, plt_count); | |
566 | ||
567 | // Read the GOT entries from the base file and build the outgoing GOT. | |
568 | for (unsigned int i = 0; i < got_count; ++i) | |
569 | { | |
570 | unsigned int got_type = got_plt_reader.get_got_type(i); | |
571 | if ((got_type & 0x7f) == 0x7f) | |
572 | { | |
573 | // This is the second entry of a pair. | |
574 | got->reserve_slot(i); | |
575 | continue; | |
576 | } | |
6fa2a40b | 577 | unsigned int symndx = got_plt_reader.get_got_symndx(i); |
4829d394 CC |
578 | if (got_type & 0x80) |
579 | { | |
6fa2a40b CC |
580 | // This is an entry for a local symbol. Ignore this entry if |
581 | // the object file was replaced. | |
582 | unsigned int input_index = got_plt_reader.get_got_input_index(i); | |
4829d394 CC |
583 | gold_debug(DEBUG_INCREMENTAL, |
584 | "GOT entry %d, type %02x: (local symbol)", | |
585 | i, got_type & 0x7f); | |
6fa2a40b CC |
586 | Sized_relobj_incr<size, big_endian>* obj = |
587 | this->input_object(input_index); | |
588 | if (obj != NULL) | |
589 | target->reserve_local_got_entry(i, obj, symndx, got_type & 0x7f); | |
4829d394 CC |
590 | } |
591 | else | |
592 | { | |
593 | // This is an entry for a global symbol. GOT_DESC is the symbol | |
594 | // table index. | |
595 | // FIXME: This should really be a fatal error (corrupt input). | |
6fa2a40b CC |
596 | gold_assert(symndx >= first_global && symndx < symtab_count); |
597 | Symbol* sym = this->global_symbol(symndx - first_global); | |
4829d394 CC |
598 | gold_debug(DEBUG_INCREMENTAL, |
599 | "GOT entry %d, type %02x: %s", | |
600 | i, got_type, sym->name()); | |
6fa2a40b | 601 | target->reserve_global_got_entry(i, sym, got_type); |
4829d394 CC |
602 | } |
603 | } | |
604 | ||
605 | // Read the PLT entries from the base file and pass each to the target. | |
606 | for (unsigned int i = 0; i < plt_count; ++i) | |
607 | { | |
608 | unsigned int plt_desc = got_plt_reader.get_plt_desc(i); | |
609 | // FIXME: This should really be a fatal error (corrupt input). | |
610 | gold_assert(plt_desc >= first_global && plt_desc < symtab_count); | |
611 | Symbol* sym = this->global_symbol(plt_desc - first_global); | |
612 | gold_debug(DEBUG_INCREMENTAL, | |
613 | "PLT entry %d: %s", | |
614 | i, sym->name()); | |
615 | target->register_global_plt_entry(i, sym); | |
616 | } | |
617 | } | |
618 | ||
94a3fc8b CC |
619 | // Apply incremental relocations for symbols whose values have changed. |
620 | ||
621 | template<int size, bool big_endian> | |
622 | void | |
623 | Sized_incremental_binary<size, big_endian>::do_apply_incremental_relocs( | |
624 | const Symbol_table* symtab, | |
625 | Layout* layout, | |
626 | Output_file* of) | |
627 | { | |
628 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
629 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
630 | Incremental_symtab_reader<big_endian> isymtab(this->symtab_reader()); | |
631 | Incremental_relocs_reader<size, big_endian> irelocs(this->relocs_reader()); | |
632 | unsigned int nglobals = isymtab.symbol_count(); | |
633 | const unsigned int incr_reloc_size = irelocs.reloc_size; | |
634 | ||
635 | Relocate_info<size, big_endian> relinfo; | |
636 | relinfo.symtab = symtab; | |
637 | relinfo.layout = layout; | |
638 | relinfo.object = NULL; | |
639 | relinfo.reloc_shndx = 0; | |
640 | relinfo.reloc_shdr = NULL; | |
641 | relinfo.data_shndx = 0; | |
642 | relinfo.data_shdr = NULL; | |
643 | ||
644 | Sized_target<size, big_endian>* target = | |
645 | parameters->sized_target<size, big_endian>(); | |
646 | ||
647 | for (unsigned int i = 0; i < nglobals; i++) | |
648 | { | |
649 | const Symbol* gsym = this->global_symbol(i); | |
650 | ||
651 | // If the symbol is not referenced from any unchanged input files, | |
652 | // we do not need to reapply any of its relocations. | |
653 | if (gsym == NULL) | |
654 | continue; | |
655 | ||
656 | // If the symbol is defined in an unchanged file, we do not need to | |
657 | // reapply any of its relocations. | |
658 | if (gsym->source() == Symbol::FROM_OBJECT | |
659 | && gsym->object()->is_incremental()) | |
660 | continue; | |
661 | ||
662 | gold_debug(DEBUG_INCREMENTAL, | |
663 | "Applying incremental relocations for global symbol %s [%d]", | |
664 | gsym->name(), i); | |
665 | ||
666 | // Follow the linked list of input symbol table entries for this symbol. | |
667 | // We don't bother to figure out whether the symbol table entry belongs | |
668 | // to a changed or unchanged file because it's easier just to apply all | |
669 | // the relocations -- although we might scribble over an area that has | |
670 | // been reallocated, we do this before copying any new data into the | |
671 | // output file. | |
672 | unsigned int offset = isymtab.get_list_head(i); | |
673 | while (offset > 0) | |
674 | { | |
675 | Incremental_global_symbol_reader<big_endian> sym_info = | |
676 | this->inputs_reader().global_symbol_reader_at_offset(offset); | |
677 | unsigned int r_base = sym_info.reloc_offset(); | |
678 | unsigned int r_count = sym_info.reloc_count(); | |
679 | ||
680 | // Apply each relocation for this symbol table entry. | |
681 | for (unsigned int j = 0; j < r_count; | |
682 | ++j, r_base += incr_reloc_size) | |
683 | { | |
684 | unsigned int r_type = irelocs.get_r_type(r_base); | |
685 | unsigned int r_shndx = irelocs.get_r_shndx(r_base); | |
686 | Address r_offset = irelocs.get_r_offset(r_base); | |
687 | Addend r_addend = irelocs.get_r_addend(r_base); | |
688 | Output_section* os = this->output_section(r_shndx); | |
689 | Address address = os->address(); | |
690 | off_t section_offset = os->offset(); | |
691 | size_t view_size = os->data_size(); | |
692 | unsigned char* const view = of->get_output_view(section_offset, | |
693 | view_size); | |
694 | ||
695 | gold_debug(DEBUG_INCREMENTAL, | |
696 | " %08lx: %s + %d: type %d addend %ld", | |
697 | (long)(section_offset + r_offset), | |
698 | os->name(), | |
699 | (int)r_offset, | |
700 | r_type, | |
701 | (long)r_addend); | |
702 | ||
703 | target->apply_relocation(&relinfo, r_offset, r_type, r_addend, | |
704 | gsym, view, address, view_size); | |
705 | ||
706 | // FIXME: Do something more efficient if write_output_view | |
707 | // ever becomes more than a no-op. | |
708 | of->write_output_view(section_offset, view_size, view); | |
709 | } | |
710 | offset = sym_info.next_offset(); | |
711 | } | |
712 | } | |
713 | } | |
714 | ||
cdc29364 | 715 | // Get a view of the main symbol table and the symbol string table. |
b961d0d7 CC |
716 | |
717 | template<int size, bool big_endian> | |
cdc29364 CC |
718 | void |
719 | Sized_incremental_binary<size, big_endian>::get_symtab_view( | |
720 | View* symtab_view, | |
721 | unsigned int* nsyms, | |
722 | elfcpp::Elf_strtab* strtab) | |
b961d0d7 | 723 | { |
4829d394 CC |
724 | *symtab_view = this->view(this->main_symtab_loc_); |
725 | *nsyms = this->main_symtab_loc_.data_size / elfcpp::Elf_sizes<size>::sym_size; | |
cdc29364 | 726 | |
4829d394 CC |
727 | View strtab_view(this->view(this->main_strtab_loc_)); |
728 | *strtab = elfcpp::Elf_strtab(strtab_view.data(), | |
729 | this->main_strtab_loc_.data_size); | |
b961d0d7 CC |
730 | } |
731 | ||
c549a694 ILT |
732 | namespace |
733 | { | |
734 | ||
735 | // Create a Sized_incremental_binary object of the specified size and | |
736 | // endianness. Fails if the target architecture is not supported. | |
737 | ||
738 | template<int size, bool big_endian> | |
739 | Incremental_binary* | |
740 | make_sized_incremental_binary(Output_file* file, | |
741 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
742 | { | |
743 | Target* target = select_target(ehdr.get_e_machine(), size, big_endian, | |
744 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
745 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
746 | if (target == NULL) | |
747 | { | |
748 | explain_no_incremental(_("unsupported ELF machine number %d"), | |
749 | ehdr.get_e_machine()); | |
750 | return NULL; | |
751 | } | |
752 | ||
3aec4f9c RÁE |
753 | if (!parameters->target_valid()) |
754 | set_parameters_target(target); | |
755 | else if (target != ¶meters->target()) | |
756 | gold_error(_("%s: incompatible target"), file->filename()); | |
757 | ||
c549a694 ILT |
758 | return new Sized_incremental_binary<size, big_endian>(file, ehdr, target); |
759 | } | |
760 | ||
761 | } // End of anonymous namespace. | |
762 | ||
09ec0418 CC |
763 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
764 | // possible, e.g. FILE is not an ELF file or has an unsupported target. FILE | |
c549a694 ILT |
765 | // should be opened. |
766 | ||
767 | Incremental_binary* | |
768 | open_incremental_binary(Output_file* file) | |
769 | { | |
770 | off_t filesize = file->filesize(); | |
771 | int want = elfcpp::Elf_recognizer::max_header_size; | |
772 | if (filesize < want) | |
773 | want = filesize; | |
774 | ||
775 | const unsigned char* p = file->get_input_view(0, want); | |
776 | if (!elfcpp::Elf_recognizer::is_elf_file(p, want)) | |
777 | { | |
778 | explain_no_incremental(_("output is not an ELF file.")); | |
779 | return NULL; | |
780 | } | |
781 | ||
ac33a407 DK |
782 | int size = 0; |
783 | bool big_endian = false; | |
c549a694 ILT |
784 | std::string error; |
785 | if (!elfcpp::Elf_recognizer::is_valid_header(p, want, &size, &big_endian, | |
786 | &error)) | |
787 | { | |
788 | explain_no_incremental(error.c_str()); | |
789 | return NULL; | |
790 | } | |
791 | ||
792 | Incremental_binary* result = NULL; | |
793 | if (size == 32) | |
794 | { | |
795 | if (big_endian) | |
796 | { | |
797 | #ifdef HAVE_TARGET_32_BIG | |
798 | result = make_sized_incremental_binary<32, true>( | |
799 | file, elfcpp::Ehdr<32, true>(p)); | |
800 | #else | |
801 | explain_no_incremental(_("unsupported file: 32-bit, big-endian")); | |
802 | #endif | |
803 | } | |
804 | else | |
805 | { | |
806 | #ifdef HAVE_TARGET_32_LITTLE | |
807 | result = make_sized_incremental_binary<32, false>( | |
808 | file, elfcpp::Ehdr<32, false>(p)); | |
809 | #else | |
810 | explain_no_incremental(_("unsupported file: 32-bit, little-endian")); | |
811 | #endif | |
812 | } | |
813 | } | |
814 | else if (size == 64) | |
815 | { | |
816 | if (big_endian) | |
817 | { | |
818 | #ifdef HAVE_TARGET_64_BIG | |
819 | result = make_sized_incremental_binary<64, true>( | |
820 | file, elfcpp::Ehdr<64, true>(p)); | |
821 | #else | |
822 | explain_no_incremental(_("unsupported file: 64-bit, big-endian")); | |
823 | #endif | |
824 | } | |
825 | else | |
826 | { | |
827 | #ifdef HAVE_TARGET_64_LITTLE | |
828 | result = make_sized_incremental_binary<64, false>( | |
829 | file, elfcpp::Ehdr<64, false>(p)); | |
830 | #else | |
831 | explain_no_incremental(_("unsupported file: 64-bit, little-endian")); | |
832 | #endif | |
833 | } | |
834 | } | |
835 | else | |
836 | gold_unreachable(); | |
837 | ||
838 | return result; | |
839 | } | |
840 | ||
09ec0418 CC |
841 | // Class Incremental_inputs. |
842 | ||
3ce2c28e ILT |
843 | // Add the command line to the string table, setting |
844 | // command_line_key_. In incremental builds, the command line is | |
845 | // stored in .gnu_incremental_inputs so that the next linker run can | |
846 | // check if the command line options didn't change. | |
847 | ||
848 | void | |
849 | Incremental_inputs::report_command_line(int argc, const char* const* argv) | |
850 | { | |
851 | // Always store 'gold' as argv[0] to avoid a full relink if the user used a | |
852 | // different path to the linker. | |
853 | std::string args("gold"); | |
854 | // Copied from collect_argv in main.cc. | |
855 | for (int i = 1; i < argc; ++i) | |
856 | { | |
09ec0418 | 857 | // Adding/removing these options should not result in a full relink. |
8c21d9d3 CC |
858 | if (strcmp(argv[i], "--incremental") == 0 |
859 | || strcmp(argv[i], "--incremental-full") == 0 | |
860 | || strcmp(argv[i], "--incremental-update") == 0 | |
861 | || strcmp(argv[i], "--incremental-changed") == 0 | |
b19b0c6d | 862 | || strcmp(argv[i], "--incremental-unchanged") == 0 |
cdc29364 | 863 | || strcmp(argv[i], "--incremental-unknown") == 0 |
aa92d6ed | 864 | || is_prefix_of("--incremental-base=", argv[i]) |
cdc29364 | 865 | || is_prefix_of("--debug=", argv[i])) |
b19b0c6d | 866 | continue; |
aa92d6ed CC |
867 | if (strcmp(argv[i], "--incremental-base") == 0 |
868 | || strcmp(argv[i], "--debug") == 0) | |
869 | { | |
870 | // When these options are used without the '=', skip the | |
871 | // following parameter as well. | |
872 | ++i; | |
873 | continue; | |
874 | } | |
b19b0c6d | 875 | |
3ce2c28e ILT |
876 | args.append(" '"); |
877 | // Now append argv[i], but with all single-quotes escaped | |
878 | const char* argpos = argv[i]; | |
879 | while (1) | |
880 | { | |
881 | const int len = strcspn(argpos, "'"); | |
882 | args.append(argpos, len); | |
883 | if (argpos[len] == '\0') | |
884 | break; | |
885 | args.append("'\"'\"'"); | |
886 | argpos += len + 1; | |
887 | } | |
888 | args.append("'"); | |
889 | } | |
c4aa1e2d ILT |
890 | |
891 | this->command_line_ = args; | |
892 | this->strtab_->add(this->command_line_.c_str(), false, | |
893 | &this->command_line_key_); | |
3ce2c28e ILT |
894 | } |
895 | ||
09ec0418 CC |
896 | // Record the input archive file ARCHIVE. This is called by the |
897 | // Add_archive_symbols task before determining which archive members | |
898 | // to include. We create the Incremental_archive_entry here and | |
899 | // attach it to the Archive, but we do not add it to the list of | |
900 | // input objects until report_archive_end is called. | |
072fe7ce ILT |
901 | |
902 | void | |
c7975edd | 903 | Incremental_inputs::report_archive_begin(Library_base* arch, |
cdc29364 | 904 | unsigned int arg_serial, |
c7975edd | 905 | Script_info* script_info) |
072fe7ce | 906 | { |
09ec0418 | 907 | Stringpool::Key filename_key; |
e0c52780 | 908 | Timespec mtime = arch->get_mtime(); |
072fe7ce | 909 | |
cdc29364 CC |
910 | // For a file loaded from a script, don't record its argument serial number. |
911 | if (script_info != NULL) | |
912 | arg_serial = 0; | |
913 | ||
09ec0418 CC |
914 | this->strtab_->add(arch->filename().c_str(), false, &filename_key); |
915 | Incremental_archive_entry* entry = | |
cdc29364 | 916 | new Incremental_archive_entry(filename_key, arg_serial, mtime); |
09ec0418 | 917 | arch->set_incremental_info(entry); |
c7975edd CC |
918 | |
919 | if (script_info != NULL) | |
920 | { | |
921 | Incremental_script_entry* script_entry = script_info->incremental_info(); | |
922 | gold_assert(script_entry != NULL); | |
923 | script_entry->add_object(entry); | |
924 | } | |
072fe7ce ILT |
925 | } |
926 | ||
e0c52780 CC |
927 | // Visitor class for processing the unused global symbols in a library. |
928 | // An instance of this class is passed to the library's | |
929 | // for_all_unused_symbols() iterator, which will call the visit() | |
930 | // function for each global symbol defined in each unused library | |
931 | // member. We add those symbol names to the incremental info for the | |
932 | // library. | |
933 | ||
934 | class Unused_symbol_visitor : public Library_base::Symbol_visitor_base | |
935 | { | |
936 | public: | |
937 | Unused_symbol_visitor(Incremental_archive_entry* entry, Stringpool* strtab) | |
938 | : entry_(entry), strtab_(strtab) | |
939 | { } | |
940 | ||
941 | void | |
942 | visit(const char* sym) | |
943 | { | |
944 | Stringpool::Key symbol_key; | |
945 | this->strtab_->add(sym, true, &symbol_key); | |
946 | this->entry_->add_unused_global_symbol(symbol_key); | |
947 | } | |
948 | ||
949 | private: | |
950 | Incremental_archive_entry* entry_; | |
951 | Stringpool* strtab_; | |
952 | }; | |
953 | ||
09ec0418 CC |
954 | // Finish recording the input archive file ARCHIVE. This is called by the |
955 | // Add_archive_symbols task after determining which archive members | |
956 | // to include. | |
072fe7ce ILT |
957 | |
958 | void | |
e0c52780 | 959 | Incremental_inputs::report_archive_end(Library_base* arch) |
072fe7ce | 960 | { |
09ec0418 CC |
961 | Incremental_archive_entry* entry = arch->incremental_info(); |
962 | ||
963 | gold_assert(entry != NULL); | |
cdc29364 | 964 | this->inputs_.push_back(entry); |
09ec0418 CC |
965 | |
966 | // Collect unused global symbols. | |
e0c52780 CC |
967 | Unused_symbol_visitor v(entry, this->strtab_); |
968 | arch->for_all_unused_symbols(&v); | |
072fe7ce ILT |
969 | } |
970 | ||
09ec0418 CC |
971 | // Record the input object file OBJ. If ARCH is not NULL, attach |
972 | // the object file to the archive. This is called by the | |
973 | // Add_symbols task after finding out the type of the file. | |
072fe7ce ILT |
974 | |
975 | void | |
cdc29364 CC |
976 | Incremental_inputs::report_object(Object* obj, unsigned int arg_serial, |
977 | Library_base* arch, Script_info* script_info) | |
072fe7ce | 978 | { |
09ec0418 | 979 | Stringpool::Key filename_key; |
cdc29364 CC |
980 | Timespec mtime = obj->get_mtime(); |
981 | ||
982 | // For a file loaded from a script, don't record its argument serial number. | |
983 | if (script_info != NULL) | |
984 | arg_serial = 0; | |
09ec0418 CC |
985 | |
986 | this->strtab_->add(obj->name().c_str(), false, &filename_key); | |
072fe7ce | 987 | |
0f1c85a6 CC |
988 | Incremental_input_entry* input_entry; |
989 | ||
990 | this->current_object_ = obj; | |
991 | ||
992 | if (!obj->is_dynamic()) | |
09ec0418 | 993 | { |
0f1c85a6 CC |
994 | this->current_object_entry_ = |
995 | new Incremental_object_entry(filename_key, obj, arg_serial, mtime); | |
996 | input_entry = this->current_object_entry_; | |
997 | if (arch != NULL) | |
998 | { | |
999 | Incremental_archive_entry* arch_entry = arch->incremental_info(); | |
1000 | gold_assert(arch_entry != NULL); | |
1001 | arch_entry->add_object(this->current_object_entry_); | |
1002 | } | |
09ec0418 | 1003 | } |
0f1c85a6 CC |
1004 | else |
1005 | { | |
1006 | this->current_object_entry_ = NULL; | |
1007 | Stringpool::Key soname_key; | |
1008 | Dynobj* dynobj = obj->dynobj(); | |
1009 | gold_assert(dynobj != NULL); | |
1010 | this->strtab_->add(dynobj->soname(), false, &soname_key); | |
1011 | input_entry = new Incremental_dynobj_entry(filename_key, soname_key, obj, | |
1012 | arg_serial, mtime); | |
1013 | } | |
1014 | ||
1015 | if (obj->is_in_system_directory()) | |
1016 | input_entry->set_is_in_system_directory(); | |
1017 | ||
1018 | if (obj->as_needed()) | |
1019 | input_entry->set_as_needed(); | |
1020 | ||
1021 | this->inputs_.push_back(input_entry); | |
09ec0418 | 1022 | |
c7975edd CC |
1023 | if (script_info != NULL) |
1024 | { | |
1025 | Incremental_script_entry* script_entry = script_info->incremental_info(); | |
1026 | gold_assert(script_entry != NULL); | |
0f1c85a6 | 1027 | script_entry->add_object(input_entry); |
c7975edd | 1028 | } |
072fe7ce ILT |
1029 | } |
1030 | ||
09ec0418 CC |
1031 | // Record the input object file OBJ. If ARCH is not NULL, attach |
1032 | // the object file to the archive. This is called by the | |
1033 | // Add_symbols task after finding out the type of the file. | |
072fe7ce ILT |
1034 | |
1035 | void | |
09ec0418 CC |
1036 | Incremental_inputs::report_input_section(Object* obj, unsigned int shndx, |
1037 | const char* name, off_t sh_size) | |
072fe7ce | 1038 | { |
09ec0418 | 1039 | Stringpool::Key key = 0; |
072fe7ce | 1040 | |
09ec0418 CC |
1041 | if (name != NULL) |
1042 | this->strtab_->add(name, true, &key); | |
1043 | ||
1044 | gold_assert(obj == this->current_object_); | |
0f1c85a6 | 1045 | gold_assert(this->current_object_entry_ != NULL); |
09ec0418 CC |
1046 | this->current_object_entry_->add_input_section(shndx, key, sh_size); |
1047 | } | |
1048 | ||
1049 | // Record that the input argument INPUT is a script SCRIPT. This is | |
1050 | // called by read_script after parsing the script and reading the list | |
1051 | // of inputs added by this script. | |
1052 | ||
1053 | void | |
cdc29364 CC |
1054 | Incremental_inputs::report_script(Script_info* script, |
1055 | unsigned int arg_serial, | |
1056 | Timespec mtime) | |
09ec0418 CC |
1057 | { |
1058 | Stringpool::Key filename_key; | |
1059 | ||
cdc29364 | 1060 | this->strtab_->add(script->filename().c_str(), false, &filename_key); |
09ec0418 | 1061 | Incremental_script_entry* entry = |
cdc29364 | 1062 | new Incremental_script_entry(filename_key, arg_serial, script, mtime); |
09ec0418 | 1063 | this->inputs_.push_back(entry); |
c7975edd | 1064 | script->set_incremental_info(entry); |
072fe7ce ILT |
1065 | } |
1066 | ||
3ce2c28e ILT |
1067 | // Finalize the incremental link information. Called from |
1068 | // Layout::finalize. | |
1069 | ||
1070 | void | |
1071 | Incremental_inputs::finalize() | |
1072 | { | |
09ec0418 | 1073 | // Finalize the string table. |
3ce2c28e ILT |
1074 | this->strtab_->set_string_offsets(); |
1075 | } | |
1076 | ||
09ec0418 | 1077 | // Create the .gnu_incremental_inputs, _symtab, and _relocs input sections. |
3ce2c28e | 1078 | |
09ec0418 CC |
1079 | void |
1080 | Incremental_inputs::create_data_sections(Symbol_table* symtab) | |
3ce2c28e ILT |
1081 | { |
1082 | switch (parameters->size_and_endianness()) | |
1083 | { | |
1084 | #ifdef HAVE_TARGET_32_LITTLE | |
1085 | case Parameters::TARGET_32_LITTLE: | |
09ec0418 CC |
1086 | this->inputs_section_ = |
1087 | new Output_section_incremental_inputs<32, false>(this, symtab); | |
1088 | break; | |
3ce2c28e ILT |
1089 | #endif |
1090 | #ifdef HAVE_TARGET_32_BIG | |
1091 | case Parameters::TARGET_32_BIG: | |
09ec0418 CC |
1092 | this->inputs_section_ = |
1093 | new Output_section_incremental_inputs<32, true>(this, symtab); | |
1094 | break; | |
3ce2c28e ILT |
1095 | #endif |
1096 | #ifdef HAVE_TARGET_64_LITTLE | |
1097 | case Parameters::TARGET_64_LITTLE: | |
09ec0418 CC |
1098 | this->inputs_section_ = |
1099 | new Output_section_incremental_inputs<64, false>(this, symtab); | |
1100 | break; | |
3ce2c28e ILT |
1101 | #endif |
1102 | #ifdef HAVE_TARGET_64_BIG | |
1103 | case Parameters::TARGET_64_BIG: | |
09ec0418 CC |
1104 | this->inputs_section_ = |
1105 | new Output_section_incremental_inputs<64, true>(this, symtab); | |
1106 | break; | |
3ce2c28e ILT |
1107 | #endif |
1108 | default: | |
1109 | gold_unreachable(); | |
072fe7ce | 1110 | } |
09ec0418 CC |
1111 | this->symtab_section_ = new Output_data_space(4, "** incremental_symtab"); |
1112 | this->relocs_section_ = new Output_data_space(4, "** incremental_relocs"); | |
0e70b911 | 1113 | this->got_plt_section_ = new Output_data_space(4, "** incremental_got_plt"); |
3ce2c28e ILT |
1114 | } |
1115 | ||
09ec0418 CC |
1116 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
1117 | unsigned int | |
1118 | Incremental_inputs::relocs_entsize() const | |
1119 | { | |
1120 | return 8 + 2 * parameters->target().get_size() / 8; | |
1121 | } | |
1122 | ||
1123 | // Class Output_section_incremental_inputs. | |
1124 | ||
1125 | // Finalize the offsets for each input section and supplemental info block, | |
1126 | // and set the final data size of the incremental output sections. | |
3ce2c28e ILT |
1127 | |
1128 | template<int size, bool big_endian> | |
09ec0418 CC |
1129 | void |
1130 | Output_section_incremental_inputs<size, big_endian>::set_final_data_size() | |
072fe7ce | 1131 | { |
09ec0418 CC |
1132 | const Incremental_inputs* inputs = this->inputs_; |
1133 | const unsigned int sizeof_addr = size / 8; | |
1134 | const unsigned int rel_size = 8 + 2 * sizeof_addr; | |
1135 | ||
1136 | // Offset of each input entry. | |
1137 | unsigned int input_offset = this->header_size; | |
1138 | ||
1139 | // Offset of each supplemental info block. | |
4829d394 | 1140 | unsigned int file_index = 0; |
09ec0418 CC |
1141 | unsigned int info_offset = this->header_size; |
1142 | info_offset += this->input_entry_size * inputs->input_file_count(); | |
1143 | ||
1144 | // Count each input file and its supplemental information block. | |
1145 | for (Incremental_inputs::Input_list::const_iterator p = | |
1146 | inputs->input_files().begin(); | |
1147 | p != inputs->input_files().end(); | |
1148 | ++p) | |
072fe7ce | 1149 | { |
4829d394 CC |
1150 | // Set the index and offset of the input file entry. |
1151 | (*p)->set_offset(file_index, input_offset); | |
1152 | ++file_index; | |
09ec0418 CC |
1153 | input_offset += this->input_entry_size; |
1154 | ||
1155 | // Set the offset of the supplemental info block. | |
1156 | switch ((*p)->type()) | |
1157 | { | |
1158 | case INCREMENTAL_INPUT_SCRIPT: | |
c7975edd CC |
1159 | { |
1160 | Incremental_script_entry *entry = (*p)->script_entry(); | |
1161 | gold_assert(entry != NULL); | |
1162 | (*p)->set_info_offset(info_offset); | |
1163 | // Object count. | |
1164 | info_offset += 4; | |
1165 | // Each member. | |
1166 | info_offset += (entry->get_object_count() * 4); | |
1167 | } | |
09ec0418 CC |
1168 | break; |
1169 | case INCREMENTAL_INPUT_OBJECT: | |
1170 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
1171 | { | |
ca09d69a | 1172 | Incremental_object_entry* entry = (*p)->object_entry(); |
09ec0418 CC |
1173 | gold_assert(entry != NULL); |
1174 | (*p)->set_info_offset(info_offset); | |
f0f9babf | 1175 | // Input section count, global symbol count, local symbol offset, |
6fa2a40b CC |
1176 | // local symbol count, first dynamic reloc, dynamic reloc count. |
1177 | info_offset += 24; | |
09ec0418 CC |
1178 | // Each input section. |
1179 | info_offset += (entry->get_input_section_count() | |
1180 | * (8 + 2 * sizeof_addr)); | |
1181 | // Each global symbol. | |
1182 | const Object::Symbols* syms = entry->object()->get_global_symbols(); | |
cdc29364 | 1183 | info_offset += syms->size() * 20; |
09ec0418 CC |
1184 | } |
1185 | break; | |
1186 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
1187 | { | |
0f1c85a6 | 1188 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
09ec0418 CC |
1189 | gold_assert(entry != NULL); |
1190 | (*p)->set_info_offset(info_offset); | |
0f1c85a6 CC |
1191 | // Global symbol count, soname index. |
1192 | info_offset += 8; | |
09ec0418 CC |
1193 | // Each global symbol. |
1194 | const Object::Symbols* syms = entry->object()->get_global_symbols(); | |
cdc29364 CC |
1195 | gold_assert(syms != NULL); |
1196 | unsigned int nsyms = syms->size(); | |
1197 | unsigned int nsyms_out = 0; | |
1198 | for (unsigned int i = 0; i < nsyms; ++i) | |
1199 | { | |
1200 | const Symbol* sym = (*syms)[i]; | |
1201 | if (sym == NULL) | |
1202 | continue; | |
1203 | if (sym->is_forwarder()) | |
1204 | sym = this->symtab_->resolve_forwards(sym); | |
1205 | if (sym->symtab_index() != -1U) | |
1206 | ++nsyms_out; | |
1207 | } | |
1208 | info_offset += nsyms_out * 4; | |
09ec0418 CC |
1209 | } |
1210 | break; | |
1211 | case INCREMENTAL_INPUT_ARCHIVE: | |
1212 | { | |
ca09d69a | 1213 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
09ec0418 CC |
1214 | gold_assert(entry != NULL); |
1215 | (*p)->set_info_offset(info_offset); | |
1216 | // Member count + unused global symbol count. | |
1217 | info_offset += 8; | |
1218 | // Each member. | |
1219 | info_offset += (entry->get_member_count() * 4); | |
1220 | // Each global symbol. | |
1221 | info_offset += (entry->get_unused_global_symbol_count() * 4); | |
1222 | } | |
1223 | break; | |
1224 | default: | |
1225 | gold_unreachable(); | |
1226 | } | |
072fe7ce ILT |
1227 | } |
1228 | ||
09ec0418 CC |
1229 | this->set_data_size(info_offset); |
1230 | ||
1231 | // Set the size of the .gnu_incremental_symtab section. | |
1232 | inputs->symtab_section()->set_current_data_size(this->symtab_->output_count() | |
1233 | * sizeof(unsigned int)); | |
1234 | ||
1235 | // Set the size of the .gnu_incremental_relocs section. | |
1236 | inputs->relocs_section()->set_current_data_size(inputs->get_reloc_count() | |
1237 | * rel_size); | |
0e70b911 CC |
1238 | |
1239 | // Set the size of the .gnu_incremental_got_plt section. | |
1240 | Sized_target<size, big_endian>* target = | |
1241 | parameters->sized_target<size, big_endian>(); | |
1242 | unsigned int got_count = target->got_entry_count(); | |
1243 | unsigned int plt_count = target->plt_entry_count(); | |
1244 | unsigned int got_plt_size = 8; // GOT entry count, PLT entry count. | |
1245 | got_plt_size = (got_plt_size + got_count + 3) & ~3; // GOT type array. | |
6fa2a40b | 1246 | got_plt_size += got_count * 8 + plt_count * 4; // GOT array, PLT array. |
0e70b911 | 1247 | inputs->got_plt_section()->set_current_data_size(got_plt_size); |
09ec0418 CC |
1248 | } |
1249 | ||
1250 | // Write the contents of the .gnu_incremental_inputs and | |
1251 | // .gnu_incremental_symtab sections. | |
1252 | ||
1253 | template<int size, bool big_endian> | |
1254 | void | |
1255 | Output_section_incremental_inputs<size, big_endian>::do_write(Output_file* of) | |
1256 | { | |
1257 | const Incremental_inputs* inputs = this->inputs_; | |
1258 | Stringpool* strtab = inputs->get_stringpool(); | |
1259 | ||
1260 | // Get a view into the .gnu_incremental_inputs section. | |
1261 | const off_t off = this->offset(); | |
1262 | const off_t oview_size = this->data_size(); | |
1263 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1264 | unsigned char* pov = oview; | |
1265 | ||
1266 | // Get a view into the .gnu_incremental_symtab section. | |
1267 | const off_t symtab_off = inputs->symtab_section()->offset(); | |
1268 | const off_t symtab_size = inputs->symtab_section()->data_size(); | |
1269 | unsigned char* const symtab_view = of->get_output_view(symtab_off, | |
1270 | symtab_size); | |
1271 | ||
1272 | // Allocate an array of linked list heads for the .gnu_incremental_symtab | |
1273 | // section. Each element corresponds to a global symbol in the output | |
1274 | // symbol table, and points to the head of the linked list that threads | |
1275 | // through the object file input entries. The value of each element | |
1276 | // is the section-relative offset to a global symbol entry in a | |
1277 | // supplemental information block. | |
1278 | unsigned int global_sym_count = this->symtab_->output_count(); | |
1279 | unsigned int* global_syms = new unsigned int[global_sym_count]; | |
1280 | memset(global_syms, 0, global_sym_count * sizeof(unsigned int)); | |
1281 | ||
1282 | // Write the section header. | |
1283 | Stringpool::Key command_line_key = inputs->command_line_key(); | |
1284 | pov = this->write_header(pov, inputs->input_file_count(), | |
1285 | strtab->get_offset_from_key(command_line_key)); | |
1286 | ||
1287 | // Write the list of input files. | |
1288 | pov = this->write_input_files(oview, pov, strtab); | |
1289 | ||
1290 | // Write the supplemental information blocks for each input file. | |
1291 | pov = this->write_info_blocks(oview, pov, strtab, global_syms, | |
1292 | global_sym_count); | |
1293 | ||
1294 | gold_assert(pov - oview == oview_size); | |
1295 | ||
1296 | // Write the .gnu_incremental_symtab section. | |
1297 | gold_assert(global_sym_count * 4 == symtab_size); | |
1298 | this->write_symtab(symtab_view, global_syms, global_sym_count); | |
1299 | ||
1300 | delete[] global_syms; | |
1301 | ||
0e70b911 CC |
1302 | // Write the .gnu_incremental_got_plt section. |
1303 | const off_t got_plt_off = inputs->got_plt_section()->offset(); | |
1304 | const off_t got_plt_size = inputs->got_plt_section()->data_size(); | |
1305 | unsigned char* const got_plt_view = of->get_output_view(got_plt_off, | |
1306 | got_plt_size); | |
1307 | this->write_got_plt(got_plt_view, got_plt_size); | |
1308 | ||
09ec0418 CC |
1309 | of->write_output_view(off, oview_size, oview); |
1310 | of->write_output_view(symtab_off, symtab_size, symtab_view); | |
0e70b911 | 1311 | of->write_output_view(got_plt_off, got_plt_size, got_plt_view); |
09ec0418 CC |
1312 | } |
1313 | ||
1314 | // Write the section header: version, input file count, offset of command line | |
1315 | // in the string table, and 4 bytes of padding. | |
1316 | ||
1317 | template<int size, bool big_endian> | |
1318 | unsigned char* | |
1319 | Output_section_incremental_inputs<size, big_endian>::write_header( | |
1320 | unsigned char* pov, | |
1321 | unsigned int input_file_count, | |
1322 | section_offset_type command_line_offset) | |
1323 | { | |
1324 | Swap32::writeval(pov, INCREMENTAL_LINK_VERSION); | |
1325 | Swap32::writeval(pov + 4, input_file_count); | |
1326 | Swap32::writeval(pov + 8, command_line_offset); | |
1327 | Swap32::writeval(pov + 12, 0); | |
1328 | return pov + this->header_size; | |
1329 | } | |
1330 | ||
1331 | // Write the input file entries. | |
1332 | ||
1333 | template<int size, bool big_endian> | |
1334 | unsigned char* | |
1335 | Output_section_incremental_inputs<size, big_endian>::write_input_files( | |
1336 | unsigned char* oview, | |
1337 | unsigned char* pov, | |
1338 | Stringpool* strtab) | |
1339 | { | |
1340 | const Incremental_inputs* inputs = this->inputs_; | |
1341 | ||
1342 | for (Incremental_inputs::Input_list::const_iterator p = | |
1343 | inputs->input_files().begin(); | |
1344 | p != inputs->input_files().end(); | |
1345 | ++p) | |
1346 | { | |
56f75c03 | 1347 | gold_assert(static_cast<unsigned int>(pov - oview) == (*p)->get_offset()); |
09ec0418 CC |
1348 | section_offset_type filename_offset = |
1349 | strtab->get_offset_from_key((*p)->get_filename_key()); | |
1350 | const Timespec& mtime = (*p)->get_mtime(); | |
cdc29364 CC |
1351 | unsigned int flags = (*p)->type(); |
1352 | if ((*p)->is_in_system_directory()) | |
1353 | flags |= INCREMENTAL_INPUT_IN_SYSTEM_DIR; | |
0f1c85a6 CC |
1354 | if ((*p)->as_needed()) |
1355 | flags |= INCREMENTAL_INPUT_AS_NEEDED; | |
09ec0418 CC |
1356 | Swap32::writeval(pov, filename_offset); |
1357 | Swap32::writeval(pov + 4, (*p)->get_info_offset()); | |
1358 | Swap64::writeval(pov + 8, mtime.seconds); | |
1359 | Swap32::writeval(pov + 16, mtime.nanoseconds); | |
cdc29364 CC |
1360 | Swap16::writeval(pov + 20, flags); |
1361 | Swap16::writeval(pov + 22, (*p)->arg_serial()); | |
09ec0418 CC |
1362 | pov += this->input_entry_size; |
1363 | } | |
1364 | return pov; | |
1365 | } | |
1366 | ||
1367 | // Write the supplemental information blocks. | |
1368 | ||
1369 | template<int size, bool big_endian> | |
1370 | unsigned char* | |
1371 | Output_section_incremental_inputs<size, big_endian>::write_info_blocks( | |
1372 | unsigned char* oview, | |
1373 | unsigned char* pov, | |
1374 | Stringpool* strtab, | |
1375 | unsigned int* global_syms, | |
1376 | unsigned int global_sym_count) | |
1377 | { | |
1378 | const Incremental_inputs* inputs = this->inputs_; | |
1379 | unsigned int first_global_index = this->symtab_->first_global_index(); | |
1380 | ||
1381 | for (Incremental_inputs::Input_list::const_iterator p = | |
1382 | inputs->input_files().begin(); | |
1383 | p != inputs->input_files().end(); | |
1384 | ++p) | |
1385 | { | |
1386 | switch ((*p)->type()) | |
1387 | { | |
1388 | case INCREMENTAL_INPUT_SCRIPT: | |
c7975edd CC |
1389 | { |
1390 | gold_assert(static_cast<unsigned int>(pov - oview) | |
1391 | == (*p)->get_info_offset()); | |
1392 | Incremental_script_entry* entry = (*p)->script_entry(); | |
1393 | gold_assert(entry != NULL); | |
1394 | ||
1395 | // Write the object count. | |
1396 | unsigned int nobjects = entry->get_object_count(); | |
1397 | Swap32::writeval(pov, nobjects); | |
1398 | pov += 4; | |
1399 | ||
1400 | // For each object, write the offset to its input file entry. | |
1401 | for (unsigned int i = 0; i < nobjects; ++i) | |
1402 | { | |
1403 | Incremental_input_entry* obj = entry->get_object(i); | |
1404 | Swap32::writeval(pov, obj->get_offset()); | |
1405 | pov += 4; | |
1406 | } | |
1407 | } | |
09ec0418 CC |
1408 | break; |
1409 | ||
1410 | case INCREMENTAL_INPUT_OBJECT: | |
1411 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
1412 | { | |
56f75c03 ILT |
1413 | gold_assert(static_cast<unsigned int>(pov - oview) |
1414 | == (*p)->get_info_offset()); | |
09ec0418 CC |
1415 | Incremental_object_entry* entry = (*p)->object_entry(); |
1416 | gold_assert(entry != NULL); | |
1417 | const Object* obj = entry->object(); | |
f0f9babf | 1418 | const Relobj* relobj = static_cast<const Relobj*>(obj); |
09ec0418 CC |
1419 | const Object::Symbols* syms = obj->get_global_symbols(); |
1420 | // Write the input section count and global symbol count. | |
1421 | unsigned int nsections = entry->get_input_section_count(); | |
1422 | unsigned int nsyms = syms->size(); | |
f0f9babf CC |
1423 | off_t locals_offset = relobj->local_symbol_offset(); |
1424 | unsigned int nlocals = relobj->output_local_symbol_count(); | |
6fa2a40b CC |
1425 | unsigned int first_dynrel = relobj->first_dyn_reloc(); |
1426 | unsigned int ndynrel = relobj->dyn_reloc_count(); | |
09ec0418 CC |
1427 | Swap32::writeval(pov, nsections); |
1428 | Swap32::writeval(pov + 4, nsyms); | |
f0f9babf CC |
1429 | Swap32::writeval(pov + 8, static_cast<unsigned int>(locals_offset)); |
1430 | Swap32::writeval(pov + 12, nlocals); | |
6fa2a40b CC |
1431 | Swap32::writeval(pov + 16, first_dynrel); |
1432 | Swap32::writeval(pov + 20, ndynrel); | |
1433 | pov += 24; | |
09ec0418 | 1434 | |
cdc29364 CC |
1435 | // Build a temporary array to map input section indexes |
1436 | // from the original object file index to the index in the | |
1437 | // incremental info table. | |
1438 | unsigned int* index_map = new unsigned int[obj->shnum()]; | |
1439 | memset(index_map, 0, obj->shnum() * sizeof(unsigned int)); | |
1440 | ||
09ec0418 CC |
1441 | // For each input section, write the name, output section index, |
1442 | // offset within output section, and input section size. | |
1443 | for (unsigned int i = 0; i < nsections; i++) | |
1444 | { | |
cdc29364 CC |
1445 | unsigned int shndx = entry->get_input_section_index(i); |
1446 | index_map[shndx] = i + 1; | |
09ec0418 CC |
1447 | Stringpool::Key key = entry->get_input_section_name_key(i); |
1448 | off_t name_offset = 0; | |
1449 | if (key != 0) | |
1450 | name_offset = strtab->get_offset_from_key(key); | |
1451 | int out_shndx = 0; | |
1452 | off_t out_offset = 0; | |
1453 | off_t sh_size = 0; | |
cdc29364 | 1454 | Output_section* os = obj->output_section(shndx); |
09ec0418 CC |
1455 | if (os != NULL) |
1456 | { | |
1457 | out_shndx = os->out_shndx(); | |
cdc29364 | 1458 | out_offset = obj->output_section_offset(shndx); |
09ec0418 CC |
1459 | sh_size = entry->get_input_section_size(i); |
1460 | } | |
1461 | Swap32::writeval(pov, name_offset); | |
1462 | Swap32::writeval(pov + 4, out_shndx); | |
1463 | Swap::writeval(pov + 8, out_offset); | |
1464 | Swap::writeval(pov + 8 + sizeof_addr, sh_size); | |
1465 | pov += 8 + 2 * sizeof_addr; | |
1466 | } | |
1467 | ||
1468 | // For each global symbol, write its associated relocations, | |
1469 | // add it to the linked list of globals, then write the | |
1470 | // supplemental information: global symbol table index, | |
cdc29364 CC |
1471 | // input section index, linked list chain pointer, relocation |
1472 | // count, and offset to the relocations. | |
09ec0418 CC |
1473 | for (unsigned int i = 0; i < nsyms; i++) |
1474 | { | |
1475 | const Symbol* sym = (*syms)[i]; | |
793990de CC |
1476 | if (sym->is_forwarder()) |
1477 | sym = this->symtab_->resolve_forwards(sym); | |
cdc29364 CC |
1478 | unsigned int shndx = 0; |
1479 | if (sym->source() == Symbol::FROM_OBJECT | |
1480 | && sym->object() == obj | |
1481 | && sym->is_defined()) | |
1482 | { | |
1483 | bool is_ordinary; | |
1484 | unsigned int orig_shndx = sym->shndx(&is_ordinary); | |
1485 | if (is_ordinary) | |
1486 | shndx = index_map[orig_shndx]; | |
1487 | } | |
09ec0418 CC |
1488 | unsigned int symtab_index = sym->symtab_index(); |
1489 | unsigned int chain = 0; | |
1490 | unsigned int first_reloc = 0; | |
1491 | unsigned int nrelocs = obj->get_incremental_reloc_count(i); | |
1492 | if (nrelocs > 0) | |
1493 | { | |
1494 | gold_assert(symtab_index != -1U | |
1495 | && (symtab_index - first_global_index | |
1496 | < global_sym_count)); | |
1497 | first_reloc = obj->get_incremental_reloc_base(i); | |
1498 | chain = global_syms[symtab_index - first_global_index]; | |
1499 | global_syms[symtab_index - first_global_index] = | |
1500 | pov - oview; | |
1501 | } | |
1502 | Swap32::writeval(pov, symtab_index); | |
cdc29364 CC |
1503 | Swap32::writeval(pov + 4, shndx); |
1504 | Swap32::writeval(pov + 8, chain); | |
1505 | Swap32::writeval(pov + 12, nrelocs); | |
1506 | Swap32::writeval(pov + 16, first_reloc * 3 * sizeof_addr); | |
1507 | pov += 20; | |
09ec0418 | 1508 | } |
cdc29364 CC |
1509 | |
1510 | delete[] index_map; | |
09ec0418 CC |
1511 | } |
1512 | break; | |
1513 | ||
1514 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
1515 | { | |
56f75c03 ILT |
1516 | gold_assert(static_cast<unsigned int>(pov - oview) |
1517 | == (*p)->get_info_offset()); | |
0f1c85a6 | 1518 | Incremental_dynobj_entry* entry = (*p)->dynobj_entry(); |
09ec0418 CC |
1519 | gold_assert(entry != NULL); |
1520 | const Object* obj = entry->object(); | |
1521 | const Object::Symbols* syms = obj->get_global_symbols(); | |
1522 | ||
0f1c85a6 CC |
1523 | // Write the soname string table index. |
1524 | section_offset_type soname_offset = | |
1525 | strtab->get_offset_from_key(entry->get_soname_key()); | |
1526 | Swap32::writeval(pov, soname_offset); | |
1527 | pov += 4; | |
1528 | ||
cdc29364 CC |
1529 | // Skip the global symbol count for now. |
1530 | unsigned char* orig_pov = pov; | |
09ec0418 CC |
1531 | pov += 4; |
1532 | ||
1533 | // For each global symbol, write the global symbol table index. | |
cdc29364 CC |
1534 | unsigned int nsyms = syms->size(); |
1535 | unsigned int nsyms_out = 0; | |
09ec0418 CC |
1536 | for (unsigned int i = 0; i < nsyms; i++) |
1537 | { | |
1538 | const Symbol* sym = (*syms)[i]; | |
cdc29364 CC |
1539 | if (sym == NULL) |
1540 | continue; | |
1541 | if (sym->is_forwarder()) | |
1542 | sym = this->symtab_->resolve_forwards(sym); | |
1543 | if (sym->symtab_index() == -1U) | |
1544 | continue; | |
1545 | unsigned int def_flag = 0; | |
1546 | if (sym->source() == Symbol::FROM_OBJECT | |
1547 | && sym->object() == obj | |
1548 | && sym->is_defined()) | |
1549 | def_flag = 1U << 31; | |
1550 | Swap32::writeval(pov, sym->symtab_index() | def_flag); | |
09ec0418 | 1551 | pov += 4; |
cdc29364 | 1552 | ++nsyms_out; |
09ec0418 | 1553 | } |
cdc29364 CC |
1554 | |
1555 | // Now write the global symbol count. | |
1556 | Swap32::writeval(orig_pov, nsyms_out); | |
09ec0418 CC |
1557 | } |
1558 | break; | |
1559 | ||
1560 | case INCREMENTAL_INPUT_ARCHIVE: | |
1561 | { | |
56f75c03 ILT |
1562 | gold_assert(static_cast<unsigned int>(pov - oview) |
1563 | == (*p)->get_info_offset()); | |
09ec0418 CC |
1564 | Incremental_archive_entry* entry = (*p)->archive_entry(); |
1565 | gold_assert(entry != NULL); | |
1566 | ||
1567 | // Write the member count and unused global symbol count. | |
1568 | unsigned int nmembers = entry->get_member_count(); | |
1569 | unsigned int nsyms = entry->get_unused_global_symbol_count(); | |
1570 | Swap32::writeval(pov, nmembers); | |
1571 | Swap32::writeval(pov + 4, nsyms); | |
1572 | pov += 8; | |
1573 | ||
1574 | // For each member, write the offset to its input file entry. | |
1575 | for (unsigned int i = 0; i < nmembers; ++i) | |
1576 | { | |
1577 | Incremental_object_entry* member = entry->get_member(i); | |
1578 | Swap32::writeval(pov, member->get_offset()); | |
1579 | pov += 4; | |
1580 | } | |
1581 | ||
1582 | // For each global symbol, write the name offset. | |
1583 | for (unsigned int i = 0; i < nsyms; ++i) | |
1584 | { | |
1585 | Stringpool::Key key = entry->get_unused_global_symbol(i); | |
1586 | Swap32::writeval(pov, strtab->get_offset_from_key(key)); | |
1587 | pov += 4; | |
1588 | } | |
1589 | } | |
1590 | break; | |
1591 | ||
1592 | default: | |
1593 | gold_unreachable(); | |
1594 | } | |
1595 | } | |
1596 | return pov; | |
1597 | } | |
1598 | ||
1599 | // Write the contents of the .gnu_incremental_symtab section. | |
1600 | ||
1601 | template<int size, bool big_endian> | |
1602 | void | |
1603 | Output_section_incremental_inputs<size, big_endian>::write_symtab( | |
1604 | unsigned char* pov, | |
1605 | unsigned int* global_syms, | |
1606 | unsigned int global_sym_count) | |
1607 | { | |
1608 | for (unsigned int i = 0; i < global_sym_count; ++i) | |
1609 | { | |
1610 | Swap32::writeval(pov, global_syms[i]); | |
1611 | pov += 4; | |
1612 | } | |
3ce2c28e ILT |
1613 | } |
1614 | ||
0e70b911 CC |
1615 | // This struct holds the view information needed to write the |
1616 | // .gnu_incremental_got_plt section. | |
1617 | ||
1618 | struct Got_plt_view_info | |
1619 | { | |
1620 | // Start of the GOT type array in the output view. | |
1621 | unsigned char* got_type_p; | |
1622 | // Start of the GOT descriptor array in the output view. | |
1623 | unsigned char* got_desc_p; | |
1624 | // Start of the PLT descriptor array in the output view. | |
1625 | unsigned char* plt_desc_p; | |
1626 | // Number of GOT entries. | |
1627 | unsigned int got_count; | |
1628 | // Number of PLT entries. | |
1629 | unsigned int plt_count; | |
1630 | // Offset of the first non-reserved PLT entry (this is a target-dependent value). | |
1631 | unsigned int first_plt_entry_offset; | |
1632 | // Size of a PLT entry (this is a target-dependent value). | |
1633 | unsigned int plt_entry_size; | |
6fa2a40b CC |
1634 | // Symbol index to write in the GOT descriptor array. For global symbols, |
1635 | // this is the global symbol table index; for local symbols, it is the | |
1636 | // local symbol table index. | |
1637 | unsigned int sym_index; | |
1638 | // Input file index to write in the GOT descriptor array. For global | |
1639 | // symbols, this is 0; for local symbols, it is the index of the input | |
1640 | // file entry in the .gnu_incremental_inputs section. | |
1641 | unsigned int input_index; | |
0e70b911 CC |
1642 | }; |
1643 | ||
1644 | // Functor class for processing a GOT offset list for local symbols. | |
1645 | // Writes the GOT type and symbol index into the GOT type and descriptor | |
1646 | // arrays in the output section. | |
1647 | ||
1648 | template<int size, bool big_endian> | |
cdc29364 | 1649 | class Local_got_offset_visitor : public Got_offset_list::Visitor |
0e70b911 CC |
1650 | { |
1651 | public: | |
1652 | Local_got_offset_visitor(struct Got_plt_view_info& info) | |
1653 | : info_(info) | |
1654 | { } | |
1655 | ||
1656 | void | |
cdc29364 | 1657 | visit(unsigned int got_type, unsigned int got_offset) |
0e70b911 CC |
1658 | { |
1659 | unsigned int got_index = got_offset / this->got_entry_size_; | |
1660 | gold_assert(got_index < this->info_.got_count); | |
1661 | // We can only handle GOT entry types in the range 0..0x7e | |
1662 | // because we use a byte array to store them, and we use the | |
1663 | // high bit to flag a local symbol. | |
1664 | gold_assert(got_type < 0x7f); | |
1665 | this->info_.got_type_p[got_index] = got_type | 0x80; | |
6fa2a40b CC |
1666 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
1667 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); | |
1668 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, this->info_.input_index); | |
0e70b911 CC |
1669 | } |
1670 | ||
1671 | private: | |
1672 | static const unsigned int got_entry_size_ = size / 8; | |
1673 | struct Got_plt_view_info& info_; | |
1674 | }; | |
1675 | ||
1676 | // Functor class for processing a GOT offset list. Writes the GOT type | |
1677 | // and symbol index into the GOT type and descriptor arrays in the output | |
1678 | // section. | |
1679 | ||
1680 | template<int size, bool big_endian> | |
cdc29364 | 1681 | class Global_got_offset_visitor : public Got_offset_list::Visitor |
0e70b911 CC |
1682 | { |
1683 | public: | |
1684 | Global_got_offset_visitor(struct Got_plt_view_info& info) | |
1685 | : info_(info) | |
1686 | { } | |
1687 | ||
1688 | void | |
cdc29364 | 1689 | visit(unsigned int got_type, unsigned int got_offset) |
0e70b911 CC |
1690 | { |
1691 | unsigned int got_index = got_offset / this->got_entry_size_; | |
1692 | gold_assert(got_index < this->info_.got_count); | |
1693 | // We can only handle GOT entry types in the range 0..0x7e | |
1694 | // because we use a byte array to store them, and we use the | |
1695 | // high bit to flag a local symbol. | |
1696 | gold_assert(got_type < 0x7f); | |
1697 | this->info_.got_type_p[got_index] = got_type; | |
6fa2a40b CC |
1698 | unsigned char* pov = this->info_.got_desc_p + got_index * 8; |
1699 | elfcpp::Swap<32, big_endian>::writeval(pov, this->info_.sym_index); | |
1700 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, 0); | |
0e70b911 CC |
1701 | } |
1702 | ||
1703 | private: | |
1704 | static const unsigned int got_entry_size_ = size / 8; | |
1705 | struct Got_plt_view_info& info_; | |
1706 | }; | |
1707 | ||
1708 | // Functor class for processing the global symbol table. Processes the | |
1709 | // GOT offset list for the symbol, and writes the symbol table index | |
1710 | // into the PLT descriptor array in the output section. | |
1711 | ||
1712 | template<int size, bool big_endian> | |
1713 | class Global_symbol_visitor_got_plt | |
1714 | { | |
1715 | public: | |
1716 | Global_symbol_visitor_got_plt(struct Got_plt_view_info& info) | |
1717 | : info_(info) | |
1718 | { } | |
1719 | ||
1720 | void | |
1721 | operator()(const Sized_symbol<size>* sym) | |
1722 | { | |
1723 | typedef Global_got_offset_visitor<size, big_endian> Got_visitor; | |
1724 | const Got_offset_list* got_offsets = sym->got_offset_list(); | |
1725 | if (got_offsets != NULL) | |
1726 | { | |
6fa2a40b CC |
1727 | this->info_.sym_index = sym->symtab_index(); |
1728 | this->info_.input_index = 0; | |
cdc29364 CC |
1729 | Got_visitor v(this->info_); |
1730 | got_offsets->for_all_got_offsets(&v); | |
0e70b911 CC |
1731 | } |
1732 | if (sym->has_plt_offset()) | |
1733 | { | |
1734 | unsigned int plt_index = | |
1735 | ((sym->plt_offset() - this->info_.first_plt_entry_offset) | |
1736 | / this->info_.plt_entry_size); | |
1737 | gold_assert(plt_index < this->info_.plt_count); | |
1738 | unsigned char* pov = this->info_.plt_desc_p + plt_index * 4; | |
1739 | elfcpp::Swap<32, big_endian>::writeval(pov, sym->symtab_index()); | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | private: | |
1744 | struct Got_plt_view_info& info_; | |
1745 | }; | |
1746 | ||
1747 | // Write the contents of the .gnu_incremental_got_plt section. | |
1748 | ||
1749 | template<int size, bool big_endian> | |
1750 | void | |
1751 | Output_section_incremental_inputs<size, big_endian>::write_got_plt( | |
1752 | unsigned char* pov, | |
1753 | off_t view_size) | |
1754 | { | |
1755 | Sized_target<size, big_endian>* target = | |
1756 | parameters->sized_target<size, big_endian>(); | |
1757 | ||
1758 | // Set up the view information for the functors. | |
1759 | struct Got_plt_view_info view_info; | |
1760 | view_info.got_count = target->got_entry_count(); | |
1761 | view_info.plt_count = target->plt_entry_count(); | |
1762 | view_info.first_plt_entry_offset = target->first_plt_entry_offset(); | |
1763 | view_info.plt_entry_size = target->plt_entry_size(); | |
1764 | view_info.got_type_p = pov + 8; | |
1765 | view_info.got_desc_p = (view_info.got_type_p | |
1766 | + ((view_info.got_count + 3) & ~3)); | |
6fa2a40b | 1767 | view_info.plt_desc_p = view_info.got_desc_p + view_info.got_count * 8; |
0e70b911 CC |
1768 | |
1769 | gold_assert(pov + view_size == | |
1770 | view_info.plt_desc_p + view_info.plt_count * 4); | |
1771 | ||
1772 | // Write the section header. | |
1773 | Swap32::writeval(pov, view_info.got_count); | |
1774 | Swap32::writeval(pov + 4, view_info.plt_count); | |
1775 | ||
1776 | // Initialize the GOT type array to 0xff (reserved). | |
1777 | memset(view_info.got_type_p, 0xff, view_info.got_count); | |
1778 | ||
1779 | // Write the incremental GOT descriptors for local symbols. | |
cdc29364 | 1780 | typedef Local_got_offset_visitor<size, big_endian> Got_visitor; |
0e70b911 CC |
1781 | for (Incremental_inputs::Input_list::const_iterator p = |
1782 | this->inputs_->input_files().begin(); | |
1783 | p != this->inputs_->input_files().end(); | |
1784 | ++p) | |
1785 | { | |
1786 | if ((*p)->type() != INCREMENTAL_INPUT_OBJECT | |
1787 | && (*p)->type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER) | |
1788 | continue; | |
1789 | Incremental_object_entry* entry = (*p)->object_entry(); | |
1790 | gold_assert(entry != NULL); | |
cdc29364 | 1791 | const Object* obj = entry->object(); |
0e70b911 | 1792 | gold_assert(obj != NULL); |
6fa2a40b | 1793 | view_info.input_index = (*p)->get_file_index(); |
cdc29364 CC |
1794 | Got_visitor v(view_info); |
1795 | obj->for_all_local_got_entries(&v); | |
0e70b911 CC |
1796 | } |
1797 | ||
1798 | // Write the incremental GOT and PLT descriptors for global symbols. | |
1799 | typedef Global_symbol_visitor_got_plt<size, big_endian> Symbol_visitor; | |
1800 | symtab_->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(view_info)); | |
1801 | } | |
1802 | ||
6fa2a40b | 1803 | // Class Sized_relobj_incr. Most of these methods are not used for |
cdc29364 CC |
1804 | // Incremental objects, but are required to be implemented by the |
1805 | // base class Object. | |
1806 | ||
1807 | template<int size, bool big_endian> | |
6fa2a40b | 1808 | Sized_relobj_incr<size, big_endian>::Sized_relobj_incr( |
cdc29364 CC |
1809 | const std::string& name, |
1810 | Sized_incremental_binary<size, big_endian>* ibase, | |
1811 | unsigned int input_file_index) | |
6fa2a40b | 1812 | : Sized_relobj<size, big_endian>(name, NULL), ibase_(ibase), |
cdc29364 CC |
1813 | input_file_index_(input_file_index), |
1814 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), | |
f0f9babf CC |
1815 | local_symbol_count_(0), output_local_dynsym_count_(0), |
1816 | local_symbol_index_(0), local_symbol_offset_(0), local_dynsym_offset_(0), | |
6fa2a40b CC |
1817 | symbols_(), incr_reloc_offset_(-1U), incr_reloc_count_(0), |
1818 | incr_reloc_output_index_(0), incr_relocs_(NULL), local_symbols_() | |
cdc29364 CC |
1819 | { |
1820 | if (this->input_reader_.is_in_system_directory()) | |
1821 | this->set_is_in_system_directory(); | |
1822 | const unsigned int shnum = this->input_reader_.get_input_section_count() + 1; | |
1823 | this->set_shnum(shnum); | |
6fa2a40b | 1824 | ibase->set_input_object(input_file_index, this); |
cdc29364 CC |
1825 | } |
1826 | ||
1827 | // Read the symbols. | |
1828 | ||
1829 | template<int size, bool big_endian> | |
1830 | void | |
6fa2a40b | 1831 | Sized_relobj_incr<size, big_endian>::do_read_symbols(Read_symbols_data*) |
cdc29364 CC |
1832 | { |
1833 | gold_unreachable(); | |
1834 | } | |
1835 | ||
1836 | // Lay out the input sections. | |
1837 | ||
1838 | template<int size, bool big_endian> | |
1839 | void | |
6fa2a40b | 1840 | Sized_relobj_incr<size, big_endian>::do_layout( |
cdc29364 CC |
1841 | Symbol_table*, |
1842 | Layout* layout, | |
1843 | Read_symbols_data*) | |
1844 | { | |
1845 | const unsigned int shnum = this->shnum(); | |
1846 | Incremental_inputs* incremental_inputs = layout->incremental_inputs(); | |
1847 | gold_assert(incremental_inputs != NULL); | |
1848 | Output_sections& out_sections(this->output_sections()); | |
1849 | out_sections.resize(shnum); | |
6fa2a40b | 1850 | this->section_offsets().resize(shnum); |
cdc29364 CC |
1851 | for (unsigned int i = 1; i < shnum; i++) |
1852 | { | |
1853 | typename Input_entry_reader::Input_section_info sect = | |
1854 | this->input_reader_.get_input_section(i - 1); | |
1855 | // Add the section to the incremental inputs layout. | |
1856 | incremental_inputs->report_input_section(this, i, sect.name, | |
1857 | sect.sh_size); | |
1858 | if (sect.output_shndx == 0 || sect.sh_offset == -1) | |
1859 | continue; | |
1860 | Output_section* os = this->ibase_->output_section(sect.output_shndx); | |
1861 | gold_assert(os != NULL); | |
1862 | out_sections[i] = os; | |
6fa2a40b | 1863 | this->section_offsets()[i] = static_cast<Address>(sect.sh_offset); |
cdc29364 CC |
1864 | } |
1865 | } | |
1866 | ||
1867 | // Layout sections whose layout was deferred while waiting for | |
1868 | // input files from a plugin. | |
1869 | template<int size, bool big_endian> | |
1870 | void | |
6fa2a40b | 1871 | Sized_relobj_incr<size, big_endian>::do_layout_deferred_sections(Layout*) |
cdc29364 CC |
1872 | { |
1873 | } | |
1874 | ||
1875 | // Add the symbols to the symbol table. | |
1876 | ||
1877 | template<int size, bool big_endian> | |
1878 | void | |
6fa2a40b | 1879 | Sized_relobj_incr<size, big_endian>::do_add_symbols( |
cdc29364 CC |
1880 | Symbol_table* symtab, |
1881 | Read_symbols_data*, | |
1882 | Layout*) | |
1883 | { | |
1884 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1885 | unsigned char symbuf[sym_size]; | |
1886 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
1887 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
1888 | ||
1889 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
1890 | ||
1891 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); | |
1892 | this->symbols_.resize(nsyms); | |
1893 | ||
1894 | Incremental_binary::View symtab_view(NULL); | |
1895 | unsigned int symtab_count; | |
1896 | elfcpp::Elf_strtab strtab(NULL, 0); | |
1897 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
1898 | ||
94a3fc8b CC |
1899 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
1900 | unsigned int isym_count = isymtab.symbol_count(); | |
1901 | unsigned int first_global = symtab_count - isym_count; | |
cdc29364 | 1902 | |
f0f9babf | 1903 | const unsigned char* sym_p; |
cdc29364 CC |
1904 | for (unsigned int i = 0; i < nsyms; ++i) |
1905 | { | |
1906 | Incremental_global_symbol_reader<big_endian> info = | |
1907 | this->input_reader_.get_global_symbol_reader(i); | |
94a3fc8b CC |
1908 | unsigned int output_symndx = info.output_symndx(); |
1909 | sym_p = symtab_view.data() + output_symndx * sym_size; | |
cdc29364 CC |
1910 | elfcpp::Sym<size, big_endian> gsym(sym_p); |
1911 | const char* name; | |
1912 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) | |
1913 | name = ""; | |
1914 | ||
11e361bc | 1915 | typename elfcpp::Elf_types<size>::Elf_Addr v = gsym.get_st_value(); |
cdc29364 CC |
1916 | unsigned int shndx = gsym.get_st_shndx(); |
1917 | elfcpp::STB st_bind = gsym.get_st_bind(); | |
1918 | elfcpp::STT st_type = gsym.get_st_type(); | |
1919 | ||
1920 | // Local hidden symbols start out as globals, but get converted to | |
1921 | // to local during output. | |
1922 | if (st_bind == elfcpp::STB_LOCAL) | |
1923 | st_bind = elfcpp::STB_GLOBAL; | |
1924 | ||
1925 | unsigned int input_shndx = info.shndx(); | |
1926 | if (input_shndx == 0) | |
1927 | { | |
1928 | shndx = elfcpp::SHN_UNDEF; | |
1929 | v = 0; | |
1930 | } | |
1931 | else if (shndx != elfcpp::SHN_ABS) | |
1932 | { | |
1933 | // Find the input section and calculate the section-relative value. | |
1934 | gold_assert(shndx != elfcpp::SHN_UNDEF); | |
cdc29364 CC |
1935 | Output_section* os = this->ibase_->output_section(shndx); |
1936 | gold_assert(os != NULL && os->has_fixed_layout()); | |
1937 | typename Input_entry_reader::Input_section_info sect = | |
1938 | this->input_reader_.get_input_section(input_shndx - 1); | |
1939 | gold_assert(sect.output_shndx == shndx); | |
1940 | if (st_type != elfcpp::STT_TLS) | |
1941 | v -= os->address(); | |
1942 | v -= sect.sh_offset; | |
1943 | shndx = input_shndx; | |
1944 | } | |
1945 | ||
1946 | osym.put_st_name(0); | |
1947 | osym.put_st_value(v); | |
1948 | osym.put_st_size(gsym.get_st_size()); | |
1949 | osym.put_st_info(st_bind, st_type); | |
1950 | osym.put_st_other(gsym.get_st_other()); | |
1951 | osym.put_st_shndx(shndx); | |
1952 | ||
1953 | this->symbols_[i] = | |
1954 | symtab->add_from_incrobj(this, name, NULL, &sym); | |
94a3fc8b CC |
1955 | this->ibase_->add_global_symbol(output_symndx - first_global, |
1956 | this->symbols_[i]); | |
cdc29364 CC |
1957 | } |
1958 | } | |
1959 | ||
1960 | // Return TRUE if we should include this object from an archive library. | |
1961 | ||
1962 | template<int size, bool big_endian> | |
1963 | Archive::Should_include | |
6fa2a40b | 1964 | Sized_relobj_incr<size, big_endian>::do_should_include_member( |
cdc29364 CC |
1965 | Symbol_table*, |
1966 | Layout*, | |
1967 | Read_symbols_data*, | |
1968 | std::string*) | |
1969 | { | |
1970 | gold_unreachable(); | |
1971 | } | |
1972 | ||
1973 | // Iterate over global symbols, calling a visitor class V for each. | |
1974 | ||
1975 | template<int size, bool big_endian> | |
1976 | void | |
6fa2a40b | 1977 | Sized_relobj_incr<size, big_endian>::do_for_all_global_symbols( |
cdc29364 CC |
1978 | Read_symbols_data*, |
1979 | Library_base::Symbol_visitor_base*) | |
1980 | { | |
1981 | // This routine is not used for incremental objects. | |
1982 | } | |
1983 | ||
cdc29364 CC |
1984 | // Get the size of a section. |
1985 | ||
1986 | template<int size, bool big_endian> | |
1987 | uint64_t | |
6fa2a40b | 1988 | Sized_relobj_incr<size, big_endian>::do_section_size(unsigned int) |
cdc29364 CC |
1989 | { |
1990 | gold_unreachable(); | |
1991 | } | |
1992 | ||
1993 | // Get the name of a section. | |
1994 | ||
1995 | template<int size, bool big_endian> | |
1996 | std::string | |
6fa2a40b | 1997 | Sized_relobj_incr<size, big_endian>::do_section_name(unsigned int) |
cdc29364 CC |
1998 | { |
1999 | gold_unreachable(); | |
2000 | } | |
2001 | ||
2002 | // Return a view of the contents of a section. | |
2003 | ||
2004 | template<int size, bool big_endian> | |
2005 | Object::Location | |
6fa2a40b | 2006 | Sized_relobj_incr<size, big_endian>::do_section_contents(unsigned int) |
cdc29364 CC |
2007 | { |
2008 | gold_unreachable(); | |
2009 | } | |
2010 | ||
2011 | // Return section flags. | |
2012 | ||
2013 | template<int size, bool big_endian> | |
2014 | uint64_t | |
6fa2a40b | 2015 | Sized_relobj_incr<size, big_endian>::do_section_flags(unsigned int) |
cdc29364 CC |
2016 | { |
2017 | gold_unreachable(); | |
2018 | } | |
2019 | ||
2020 | // Return section entsize. | |
2021 | ||
2022 | template<int size, bool big_endian> | |
2023 | uint64_t | |
6fa2a40b | 2024 | Sized_relobj_incr<size, big_endian>::do_section_entsize(unsigned int) |
cdc29364 CC |
2025 | { |
2026 | gold_unreachable(); | |
2027 | } | |
2028 | ||
2029 | // Return section address. | |
2030 | ||
2031 | template<int size, bool big_endian> | |
2032 | uint64_t | |
6fa2a40b | 2033 | Sized_relobj_incr<size, big_endian>::do_section_address(unsigned int) |
cdc29364 CC |
2034 | { |
2035 | gold_unreachable(); | |
2036 | } | |
2037 | ||
2038 | // Return section type. | |
2039 | ||
2040 | template<int size, bool big_endian> | |
2041 | unsigned int | |
6fa2a40b | 2042 | Sized_relobj_incr<size, big_endian>::do_section_type(unsigned int) |
cdc29364 CC |
2043 | { |
2044 | gold_unreachable(); | |
2045 | } | |
2046 | ||
2047 | // Return the section link field. | |
2048 | ||
2049 | template<int size, bool big_endian> | |
2050 | unsigned int | |
6fa2a40b | 2051 | Sized_relobj_incr<size, big_endian>::do_section_link(unsigned int) |
cdc29364 CC |
2052 | { |
2053 | gold_unreachable(); | |
2054 | } | |
2055 | ||
2056 | // Return the section link field. | |
2057 | ||
2058 | template<int size, bool big_endian> | |
2059 | unsigned int | |
6fa2a40b | 2060 | Sized_relobj_incr<size, big_endian>::do_section_info(unsigned int) |
cdc29364 CC |
2061 | { |
2062 | gold_unreachable(); | |
2063 | } | |
2064 | ||
2065 | // Return the section alignment. | |
2066 | ||
2067 | template<int size, bool big_endian> | |
2068 | uint64_t | |
6fa2a40b | 2069 | Sized_relobj_incr<size, big_endian>::do_section_addralign(unsigned int) |
cdc29364 CC |
2070 | { |
2071 | gold_unreachable(); | |
2072 | } | |
2073 | ||
2074 | // Return the Xindex structure to use. | |
2075 | ||
2076 | template<int size, bool big_endian> | |
2077 | Xindex* | |
6fa2a40b | 2078 | Sized_relobj_incr<size, big_endian>::do_initialize_xindex() |
cdc29364 CC |
2079 | { |
2080 | gold_unreachable(); | |
2081 | } | |
2082 | ||
2083 | // Get symbol counts. | |
2084 | ||
2085 | template<int size, bool big_endian> | |
2086 | void | |
6fa2a40b | 2087 | Sized_relobj_incr<size, big_endian>::do_get_global_symbol_counts( |
cdc29364 CC |
2088 | const Symbol_table*, size_t*, size_t*) const |
2089 | { | |
2090 | gold_unreachable(); | |
2091 | } | |
2092 | ||
2093 | // Read the relocs. | |
2094 | ||
2095 | template<int size, bool big_endian> | |
2096 | void | |
6fa2a40b | 2097 | Sized_relobj_incr<size, big_endian>::do_read_relocs(Read_relocs_data*) |
cdc29364 CC |
2098 | { |
2099 | } | |
2100 | ||
2101 | // Process the relocs to find list of referenced sections. Used only | |
2102 | // during garbage collection. | |
2103 | ||
2104 | template<int size, bool big_endian> | |
2105 | void | |
6fa2a40b | 2106 | Sized_relobj_incr<size, big_endian>::do_gc_process_relocs(Symbol_table*, |
cdc29364 CC |
2107 | Layout*, |
2108 | Read_relocs_data*) | |
2109 | { | |
2110 | gold_unreachable(); | |
2111 | } | |
2112 | ||
2113 | // Scan the relocs and adjust the symbol table. | |
2114 | ||
2115 | template<int size, bool big_endian> | |
2116 | void | |
6fa2a40b | 2117 | Sized_relobj_incr<size, big_endian>::do_scan_relocs(Symbol_table*, |
cdc29364 CC |
2118 | Layout* layout, |
2119 | Read_relocs_data*) | |
2120 | { | |
2121 | // Count the incremental relocations for this object. | |
2122 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); | |
2123 | this->allocate_incremental_reloc_counts(); | |
2124 | for (unsigned int i = 0; i < nsyms; i++) | |
2125 | { | |
2126 | Incremental_global_symbol_reader<big_endian> sym = | |
2127 | this->input_reader_.get_global_symbol_reader(i); | |
2128 | unsigned int reloc_count = sym.reloc_count(); | |
2129 | if (reloc_count > 0 && this->incr_reloc_offset_ == -1U) | |
2130 | this->incr_reloc_offset_ = sym.reloc_offset(); | |
2131 | this->incr_reloc_count_ += reloc_count; | |
2132 | for (unsigned int j = 0; j < reloc_count; j++) | |
2133 | this->count_incremental_reloc(i); | |
2134 | } | |
2135 | this->incr_reloc_output_index_ = | |
2136 | layout->incremental_inputs()->get_reloc_count(); | |
2137 | this->finalize_incremental_relocs(layout, false); | |
2138 | ||
2139 | // The incoming incremental relocations may not end up in the same | |
2140 | // location after the incremental update, because the incremental info | |
2141 | // is regenerated in each link. Because the new location may overlap | |
2142 | // with other data in the updated output file, we need to copy the | |
2143 | // relocations into a buffer so that we can still read them safely | |
2144 | // after we start writing updates to the output file. | |
2145 | if (this->incr_reloc_count_ > 0) | |
2146 | { | |
2147 | const Incremental_relocs_reader<size, big_endian>& relocs_reader = | |
2148 | this->ibase_->relocs_reader(); | |
2149 | const unsigned int incr_reloc_size = relocs_reader.reloc_size; | |
2150 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; | |
2151 | this->incr_relocs_ = new unsigned char[len]; | |
2152 | memcpy(this->incr_relocs_, | |
2153 | relocs_reader.data(this->incr_reloc_offset_), | |
2154 | len); | |
2155 | } | |
2156 | } | |
2157 | ||
2158 | // Count the local symbols. | |
2159 | ||
2160 | template<int size, bool big_endian> | |
2161 | void | |
6fa2a40b | 2162 | Sized_relobj_incr<size, big_endian>::do_count_local_symbols( |
f0f9babf | 2163 | Stringpool_template<char>* pool, |
cdc29364 CC |
2164 | Stringpool_template<char>*) |
2165 | { | |
f0f9babf CC |
2166 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
2167 | ||
2168 | // Set the count of local symbols based on the incremental info. | |
2169 | unsigned int nlocals = this->input_reader_.get_local_symbol_count(); | |
2170 | this->local_symbol_count_ = nlocals; | |
2171 | this->local_symbols_.reserve(nlocals); | |
2172 | ||
2173 | // Get views of the base file's symbol table and string table. | |
2174 | Incremental_binary::View symtab_view(NULL); | |
2175 | unsigned int symtab_count; | |
2176 | elfcpp::Elf_strtab strtab(NULL, 0); | |
2177 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
2178 | ||
2179 | // Read the local symbols from the base file's symbol table. | |
2180 | off_t off = this->input_reader_.get_local_symbol_offset(); | |
2181 | const unsigned char* symp = symtab_view.data() + off; | |
2182 | for (unsigned int i = 0; i < nlocals; ++i, symp += sym_size) | |
2183 | { | |
2184 | elfcpp::Sym<size, big_endian> sym(symp); | |
2185 | const char* name; | |
2186 | if (!strtab.get_c_string(sym.get_st_name(), &name)) | |
2187 | name = ""; | |
2188 | gold_debug(DEBUG_INCREMENTAL, "Local symbol %d: %s", i, name); | |
2189 | name = pool->add(name, true, NULL); | |
2190 | this->local_symbols_.push_back(Local_symbol(name, | |
2191 | sym.get_st_value(), | |
2192 | sym.get_st_size(), | |
2193 | sym.get_st_shndx(), | |
2194 | sym.get_st_type(), | |
2195 | false)); | |
2196 | } | |
cdc29364 CC |
2197 | } |
2198 | ||
2199 | // Finalize the local symbols. | |
2200 | ||
2201 | template<int size, bool big_endian> | |
2202 | unsigned int | |
6fa2a40b | 2203 | Sized_relobj_incr<size, big_endian>::do_finalize_local_symbols( |
cdc29364 | 2204 | unsigned int index, |
f0f9babf | 2205 | off_t off, |
cdc29364 CC |
2206 | Symbol_table*) |
2207 | { | |
f0f9babf CC |
2208 | this->local_symbol_index_ = index; |
2209 | this->local_symbol_offset_ = off; | |
2210 | return index + this->local_symbol_count_; | |
cdc29364 CC |
2211 | } |
2212 | ||
2213 | // Set the offset where local dynamic symbol information will be stored. | |
2214 | ||
2215 | template<int size, bool big_endian> | |
2216 | unsigned int | |
6fa2a40b | 2217 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_indexes( |
cdc29364 CC |
2218 | unsigned int index) |
2219 | { | |
2220 | // FIXME: set local dynsym indexes. | |
2221 | return index; | |
2222 | } | |
2223 | ||
2224 | // Set the offset where local dynamic symbol information will be stored. | |
2225 | ||
2226 | template<int size, bool big_endian> | |
2227 | unsigned int | |
6fa2a40b | 2228 | Sized_relobj_incr<size, big_endian>::do_set_local_dynsym_offset(off_t) |
cdc29364 CC |
2229 | { |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | // Relocate the input sections and write out the local symbols. | |
2234 | // We don't actually do any relocation here. For unchanged input files, | |
2235 | // we reapply relocations only for symbols that have changed; that happens | |
2236 | // in queue_final_tasks. We do need to rewrite the incremental relocations | |
2237 | // for this object. | |
2238 | ||
2239 | template<int size, bool big_endian> | |
2240 | void | |
6fa2a40b | 2241 | Sized_relobj_incr<size, big_endian>::do_relocate(const Symbol_table*, |
cdc29364 CC |
2242 | const Layout* layout, |
2243 | Output_file* of) | |
2244 | { | |
2245 | if (this->incr_reloc_count_ == 0) | |
2246 | return; | |
2247 | ||
2248 | const unsigned int incr_reloc_size = | |
2249 | Incremental_relocs_reader<size, big_endian>::reloc_size; | |
2250 | ||
2251 | // Get a view for the .gnu_incremental_relocs section. | |
2252 | Incremental_inputs* inputs = layout->incremental_inputs(); | |
2253 | gold_assert(inputs != NULL); | |
2254 | const off_t relocs_off = inputs->relocs_section()->offset(); | |
2255 | const off_t relocs_size = inputs->relocs_section()->data_size(); | |
2256 | unsigned char* const view = of->get_output_view(relocs_off, relocs_size); | |
2257 | ||
2258 | // Copy the relocations from the buffer. | |
2259 | off_t off = this->incr_reloc_output_index_ * incr_reloc_size; | |
2260 | unsigned int len = this->incr_reloc_count_ * incr_reloc_size; | |
2261 | memcpy(view + off, this->incr_relocs_, len); | |
94a3fc8b CC |
2262 | |
2263 | // The output section table may have changed, so we need to map | |
2264 | // the old section index to the new section index for each relocation. | |
2265 | for (unsigned int i = 0; i < this->incr_reloc_count_; ++i) | |
2266 | { | |
2267 | unsigned char* pov = view + off + i * incr_reloc_size; | |
2268 | unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(pov + 4); | |
2269 | Output_section* os = this->ibase_->output_section(shndx); | |
2270 | gold_assert(os != NULL); | |
2271 | shndx = os->out_shndx(); | |
2272 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, shndx); | |
2273 | } | |
2274 | ||
cdc29364 | 2275 | of->write_output_view(off, len, view); |
f0f9babf CC |
2276 | |
2277 | // Get views into the output file for the portions of the symbol table | |
2278 | // and the dynamic symbol table that we will be writing. | |
2279 | off_t symtab_off = layout->symtab_section()->offset(); | |
2280 | off_t output_size = this->local_symbol_count_ * This::sym_size; | |
2281 | unsigned char* oview = NULL; | |
2282 | if (output_size > 0) | |
2283 | oview = of->get_output_view(symtab_off + this->local_symbol_offset_, | |
2284 | output_size); | |
2285 | ||
2286 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; | |
2287 | unsigned char* dyn_oview = NULL; | |
2288 | if (dyn_output_size > 0) | |
2289 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
2290 | dyn_output_size); | |
2291 | ||
2292 | // Write the local symbols. | |
2293 | unsigned char* ov = oview; | |
2294 | unsigned char* dyn_ov = dyn_oview; | |
2295 | const Stringpool* sympool = layout->sympool(); | |
2296 | const Stringpool* dynpool = layout->dynpool(); | |
2297 | Output_symtab_xindex* symtab_xindex = layout->symtab_xindex(); | |
2298 | Output_symtab_xindex* dynsym_xindex = layout->dynsym_xindex(); | |
2299 | for (unsigned int i = 0; i < this->local_symbol_count_; ++i) | |
2300 | { | |
2301 | Local_symbol& lsym(this->local_symbols_[i]); | |
2302 | ||
2303 | bool is_ordinary; | |
2304 | unsigned int st_shndx = this->adjust_sym_shndx(i, lsym.st_shndx, | |
2305 | &is_ordinary); | |
2306 | if (is_ordinary) | |
2307 | { | |
2308 | Output_section* os = this->ibase_->output_section(st_shndx); | |
2309 | st_shndx = os->out_shndx(); | |
2310 | if (st_shndx >= elfcpp::SHN_LORESERVE) | |
2311 | { | |
2312 | symtab_xindex->add(this->local_symbol_index_ + i, st_shndx); | |
2313 | if (lsym.needs_dynsym_entry) | |
2314 | dynsym_xindex->add(lsym.output_dynsym_index, st_shndx); | |
2315 | st_shndx = elfcpp::SHN_XINDEX; | |
2316 | } | |
2317 | } | |
2318 | ||
2319 | // Write the symbol to the output symbol table. | |
2320 | { | |
2321 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
2322 | osym.put_st_name(sympool->get_offset(lsym.name)); | |
2323 | osym.put_st_value(lsym.st_value); | |
2324 | osym.put_st_size(lsym.st_size); | |
2325 | osym.put_st_info(elfcpp::STB_LOCAL, | |
2326 | static_cast<elfcpp::STT>(lsym.st_type)); | |
2327 | osym.put_st_other(0); | |
2328 | osym.put_st_shndx(st_shndx); | |
2329 | ov += sym_size; | |
2330 | } | |
2331 | ||
2332 | // Write the symbol to the output dynamic symbol table. | |
2333 | if (lsym.needs_dynsym_entry) | |
2334 | { | |
2335 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
2336 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
2337 | osym.put_st_name(dynpool->get_offset(lsym.name)); | |
2338 | osym.put_st_value(lsym.st_value); | |
2339 | osym.put_st_size(lsym.st_size); | |
2340 | osym.put_st_info(elfcpp::STB_LOCAL, | |
2341 | static_cast<elfcpp::STT>(lsym.st_type)); | |
2342 | osym.put_st_other(0); | |
2343 | osym.put_st_shndx(st_shndx); | |
2344 | dyn_ov += sym_size; | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | if (output_size > 0) | |
2349 | { | |
2350 | gold_assert(ov - oview == output_size); | |
2351 | of->write_output_view(symtab_off + this->local_symbol_offset_, | |
2352 | output_size, oview); | |
2353 | } | |
2354 | ||
2355 | if (dyn_output_size > 0) | |
2356 | { | |
2357 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
2358 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
2359 | dyn_oview); | |
2360 | } | |
cdc29364 CC |
2361 | } |
2362 | ||
2363 | // Set the offset of a section. | |
2364 | ||
2365 | template<int size, bool big_endian> | |
2366 | void | |
6fa2a40b | 2367 | Sized_relobj_incr<size, big_endian>::do_set_section_offset(unsigned int, |
cdc29364 CC |
2368 | uint64_t) |
2369 | { | |
2370 | } | |
2371 | ||
2372 | // Class Sized_incr_dynobj. Most of these methods are not used for | |
2373 | // Incremental objects, but are required to be implemented by the | |
2374 | // base class Object. | |
2375 | ||
2376 | template<int size, bool big_endian> | |
2377 | Sized_incr_dynobj<size, big_endian>::Sized_incr_dynobj( | |
2378 | const std::string& name, | |
2379 | Sized_incremental_binary<size, big_endian>* ibase, | |
2380 | unsigned int input_file_index) | |
2381 | : Dynobj(name, NULL), ibase_(ibase), | |
2382 | input_file_index_(input_file_index), | |
2383 | input_reader_(ibase->inputs_reader().input_file(input_file_index)), | |
2384 | symbols_() | |
2385 | { | |
2386 | if (this->input_reader_.is_in_system_directory()) | |
2387 | this->set_is_in_system_directory(); | |
0f1c85a6 CC |
2388 | if (this->input_reader_.as_needed()) |
2389 | this->set_as_needed(); | |
2390 | this->set_soname_string(this->input_reader_.get_soname()); | |
cdc29364 CC |
2391 | this->set_shnum(0); |
2392 | } | |
2393 | ||
2394 | // Read the symbols. | |
2395 | ||
2396 | template<int size, bool big_endian> | |
2397 | void | |
2398 | Sized_incr_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
2399 | { | |
2400 | gold_unreachable(); | |
2401 | } | |
2402 | ||
2403 | // Lay out the input sections. | |
2404 | ||
2405 | template<int size, bool big_endian> | |
2406 | void | |
2407 | Sized_incr_dynobj<size, big_endian>::do_layout( | |
2408 | Symbol_table*, | |
2409 | Layout*, | |
2410 | Read_symbols_data*) | |
2411 | { | |
2412 | } | |
2413 | ||
2414 | // Add the symbols to the symbol table. | |
2415 | ||
2416 | template<int size, bool big_endian> | |
2417 | void | |
2418 | Sized_incr_dynobj<size, big_endian>::do_add_symbols( | |
2419 | Symbol_table* symtab, | |
2420 | Read_symbols_data*, | |
2421 | Layout*) | |
2422 | { | |
2423 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2424 | unsigned char symbuf[sym_size]; | |
2425 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
2426 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
2427 | ||
2428 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
2429 | ||
2430 | unsigned int nsyms = this->input_reader_.get_global_symbol_count(); | |
2431 | this->symbols_.resize(nsyms); | |
2432 | ||
2433 | Incremental_binary::View symtab_view(NULL); | |
2434 | unsigned int symtab_count; | |
2435 | elfcpp::Elf_strtab strtab(NULL, 0); | |
2436 | this->ibase_->get_symtab_view(&symtab_view, &symtab_count, &strtab); | |
2437 | ||
94a3fc8b CC |
2438 | Incremental_symtab_reader<big_endian> isymtab(this->ibase_->symtab_reader()); |
2439 | unsigned int isym_count = isymtab.symbol_count(); | |
2440 | unsigned int first_global = symtab_count - isym_count; | |
cdc29364 | 2441 | |
f0f9babf | 2442 | const unsigned char* sym_p; |
cdc29364 CC |
2443 | for (unsigned int i = 0; i < nsyms; ++i) |
2444 | { | |
2445 | bool is_def; | |
2446 | unsigned int output_symndx = | |
2447 | this->input_reader_.get_output_symbol_index(i, &is_def); | |
2448 | sym_p = symtab_view.data() + output_symndx * sym_size; | |
2449 | elfcpp::Sym<size, big_endian> gsym(sym_p); | |
2450 | const char* name; | |
2451 | if (!strtab.get_c_string(gsym.get_st_name(), &name)) | |
2452 | name = ""; | |
2453 | ||
2454 | typename elfcpp::Elf_types<size>::Elf_Addr v; | |
2455 | unsigned int shndx; | |
2456 | elfcpp::STB st_bind = gsym.get_st_bind(); | |
2457 | elfcpp::STT st_type = gsym.get_st_type(); | |
2458 | ||
2459 | // Local hidden symbols start out as globals, but get converted to | |
2460 | // to local during output. | |
2461 | if (st_bind == elfcpp::STB_LOCAL) | |
2462 | st_bind = elfcpp::STB_GLOBAL; | |
2463 | ||
2464 | if (!is_def) | |
2465 | { | |
2466 | shndx = elfcpp::SHN_UNDEF; | |
2467 | v = 0; | |
2468 | } | |
2469 | else | |
2470 | { | |
2471 | // For a symbol defined in a shared object, the section index | |
2472 | // is meaningless, as long as it's not SHN_UNDEF. | |
2473 | shndx = 1; | |
2474 | v = gsym.get_st_value(); | |
2475 | } | |
2476 | ||
2477 | osym.put_st_name(0); | |
2478 | osym.put_st_value(v); | |
2479 | osym.put_st_size(gsym.get_st_size()); | |
2480 | osym.put_st_info(st_bind, st_type); | |
2481 | osym.put_st_other(gsym.get_st_other()); | |
2482 | osym.put_st_shndx(shndx); | |
2483 | ||
2484 | this->symbols_[i] = | |
2485 | symtab->add_from_incrobj<size, big_endian>(this, name, NULL, &sym); | |
94a3fc8b CC |
2486 | this->ibase_->add_global_symbol(output_symndx - first_global, |
2487 | this->symbols_[i]); | |
cdc29364 CC |
2488 | } |
2489 | } | |
2490 | ||
2491 | // Return TRUE if we should include this object from an archive library. | |
2492 | ||
2493 | template<int size, bool big_endian> | |
2494 | Archive::Should_include | |
2495 | Sized_incr_dynobj<size, big_endian>::do_should_include_member( | |
2496 | Symbol_table*, | |
2497 | Layout*, | |
2498 | Read_symbols_data*, | |
2499 | std::string*) | |
2500 | { | |
2501 | gold_unreachable(); | |
2502 | } | |
2503 | ||
2504 | // Iterate over global symbols, calling a visitor class V for each. | |
2505 | ||
2506 | template<int size, bool big_endian> | |
2507 | void | |
2508 | Sized_incr_dynobj<size, big_endian>::do_for_all_global_symbols( | |
2509 | Read_symbols_data*, | |
2510 | Library_base::Symbol_visitor_base*) | |
2511 | { | |
2512 | // This routine is not used for dynamic libraries. | |
2513 | } | |
2514 | ||
2515 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
2516 | // associated with a local symbol. | |
2517 | ||
2518 | template<int size, bool big_endian> | |
2519 | void | |
2520 | Sized_incr_dynobj<size, big_endian>::do_for_all_local_got_entries( | |
2521 | Got_offset_list::Visitor*) const | |
2522 | { | |
cdc29364 CC |
2523 | } |
2524 | ||
2525 | // Get the size of a section. | |
2526 | ||
2527 | template<int size, bool big_endian> | |
2528 | uint64_t | |
2529 | Sized_incr_dynobj<size, big_endian>::do_section_size(unsigned int) | |
2530 | { | |
2531 | gold_unreachable(); | |
2532 | } | |
2533 | ||
2534 | // Get the name of a section. | |
2535 | ||
2536 | template<int size, bool big_endian> | |
2537 | std::string | |
2538 | Sized_incr_dynobj<size, big_endian>::do_section_name(unsigned int) | |
2539 | { | |
2540 | gold_unreachable(); | |
2541 | } | |
2542 | ||
2543 | // Return a view of the contents of a section. | |
2544 | ||
2545 | template<int size, bool big_endian> | |
2546 | Object::Location | |
2547 | Sized_incr_dynobj<size, big_endian>::do_section_contents(unsigned int) | |
2548 | { | |
2549 | gold_unreachable(); | |
2550 | } | |
2551 | ||
2552 | // Return section flags. | |
2553 | ||
2554 | template<int size, bool big_endian> | |
2555 | uint64_t | |
2556 | Sized_incr_dynobj<size, big_endian>::do_section_flags(unsigned int) | |
2557 | { | |
2558 | gold_unreachable(); | |
2559 | } | |
2560 | ||
2561 | // Return section entsize. | |
2562 | ||
2563 | template<int size, bool big_endian> | |
2564 | uint64_t | |
2565 | Sized_incr_dynobj<size, big_endian>::do_section_entsize(unsigned int) | |
2566 | { | |
2567 | gold_unreachable(); | |
2568 | } | |
2569 | ||
2570 | // Return section address. | |
2571 | ||
2572 | template<int size, bool big_endian> | |
2573 | uint64_t | |
2574 | Sized_incr_dynobj<size, big_endian>::do_section_address(unsigned int) | |
2575 | { | |
2576 | gold_unreachable(); | |
2577 | } | |
2578 | ||
2579 | // Return section type. | |
2580 | ||
2581 | template<int size, bool big_endian> | |
2582 | unsigned int | |
2583 | Sized_incr_dynobj<size, big_endian>::do_section_type(unsigned int) | |
2584 | { | |
2585 | gold_unreachable(); | |
2586 | } | |
2587 | ||
2588 | // Return the section link field. | |
2589 | ||
2590 | template<int size, bool big_endian> | |
2591 | unsigned int | |
2592 | Sized_incr_dynobj<size, big_endian>::do_section_link(unsigned int) | |
2593 | { | |
2594 | gold_unreachable(); | |
2595 | } | |
2596 | ||
2597 | // Return the section link field. | |
2598 | ||
2599 | template<int size, bool big_endian> | |
2600 | unsigned int | |
2601 | Sized_incr_dynobj<size, big_endian>::do_section_info(unsigned int) | |
2602 | { | |
2603 | gold_unreachable(); | |
2604 | } | |
2605 | ||
2606 | // Return the section alignment. | |
2607 | ||
2608 | template<int size, bool big_endian> | |
2609 | uint64_t | |
2610 | Sized_incr_dynobj<size, big_endian>::do_section_addralign(unsigned int) | |
2611 | { | |
2612 | gold_unreachable(); | |
2613 | } | |
2614 | ||
2615 | // Return the Xindex structure to use. | |
2616 | ||
2617 | template<int size, bool big_endian> | |
2618 | Xindex* | |
2619 | Sized_incr_dynobj<size, big_endian>::do_initialize_xindex() | |
2620 | { | |
2621 | gold_unreachable(); | |
2622 | } | |
2623 | ||
2624 | // Get symbol counts. | |
2625 | ||
2626 | template<int size, bool big_endian> | |
2627 | void | |
2628 | Sized_incr_dynobj<size, big_endian>::do_get_global_symbol_counts( | |
2629 | const Symbol_table*, size_t*, size_t*) const | |
2630 | { | |
2631 | gold_unreachable(); | |
2632 | } | |
2633 | ||
2634 | // Allocate an incremental object of the appropriate size and endianness. | |
2635 | ||
2636 | Object* | |
2637 | make_sized_incremental_object( | |
2638 | Incremental_binary* ibase, | |
2639 | unsigned int input_file_index, | |
2640 | Incremental_input_type input_type, | |
2641 | const Incremental_binary::Input_reader* input_reader) | |
2642 | { | |
2643 | Object* obj = NULL; | |
2644 | std::string name(input_reader->filename()); | |
2645 | ||
2646 | switch (parameters->size_and_endianness()) | |
2647 | { | |
2648 | #ifdef HAVE_TARGET_32_LITTLE | |
2649 | case Parameters::TARGET_32_LITTLE: | |
2650 | { | |
2651 | Sized_incremental_binary<32, false>* sized_ibase = | |
2652 | static_cast<Sized_incremental_binary<32, false>*>(ibase); | |
2653 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
2654 | obj = new Sized_incr_dynobj<32, false>(name, sized_ibase, | |
2655 | input_file_index); | |
2656 | else | |
6fa2a40b | 2657 | obj = new Sized_relobj_incr<32, false>(name, sized_ibase, |
cdc29364 CC |
2658 | input_file_index); |
2659 | } | |
2660 | break; | |
2661 | #endif | |
2662 | #ifdef HAVE_TARGET_32_BIG | |
2663 | case Parameters::TARGET_32_BIG: | |
2664 | { | |
2665 | Sized_incremental_binary<32, true>* sized_ibase = | |
2666 | static_cast<Sized_incremental_binary<32, true>*>(ibase); | |
2667 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
2668 | obj = new Sized_incr_dynobj<32, true>(name, sized_ibase, | |
2669 | input_file_index); | |
2670 | else | |
6fa2a40b | 2671 | obj = new Sized_relobj_incr<32, true>(name, sized_ibase, |
cdc29364 CC |
2672 | input_file_index); |
2673 | } | |
2674 | break; | |
2675 | #endif | |
2676 | #ifdef HAVE_TARGET_64_LITTLE | |
2677 | case Parameters::TARGET_64_LITTLE: | |
2678 | { | |
2679 | Sized_incremental_binary<64, false>* sized_ibase = | |
2680 | static_cast<Sized_incremental_binary<64, false>*>(ibase); | |
2681 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
2682 | obj = new Sized_incr_dynobj<64, false>(name, sized_ibase, | |
2683 | input_file_index); | |
2684 | else | |
6fa2a40b | 2685 | obj = new Sized_relobj_incr<64, false>(name, sized_ibase, |
cdc29364 CC |
2686 | input_file_index); |
2687 | } | |
2688 | break; | |
2689 | #endif | |
2690 | #ifdef HAVE_TARGET_64_BIG | |
2691 | case Parameters::TARGET_64_BIG: | |
2692 | { | |
2693 | Sized_incremental_binary<64, true>* sized_ibase = | |
2694 | static_cast<Sized_incremental_binary<64, true>*>(ibase); | |
2695 | if (input_type == INCREMENTAL_INPUT_SHARED_LIBRARY) | |
2696 | obj = new Sized_incr_dynobj<64, true>(name, sized_ibase, | |
2697 | input_file_index); | |
2698 | else | |
6fa2a40b | 2699 | obj = new Sized_relobj_incr<64, true>(name, sized_ibase, |
cdc29364 CC |
2700 | input_file_index); |
2701 | } | |
2702 | break; | |
2703 | #endif | |
2704 | default: | |
2705 | gold_unreachable(); | |
2706 | } | |
2707 | ||
2708 | gold_assert(obj != NULL); | |
2709 | return obj; | |
2710 | } | |
2711 | ||
2712 | // Copy the unused symbols from the incremental input info. | |
2713 | // We need to do this because we may be overwriting the incremental | |
2714 | // input info in the base file before we write the new incremental | |
2715 | // info. | |
2716 | void | |
2717 | Incremental_library::copy_unused_symbols() | |
2718 | { | |
2719 | unsigned int symcount = this->input_reader_->get_unused_symbol_count(); | |
2720 | this->unused_symbols_.reserve(symcount); | |
2721 | for (unsigned int i = 0; i < symcount; ++i) | |
2722 | { | |
2723 | std::string name(this->input_reader_->get_unused_symbol(i)); | |
2724 | this->unused_symbols_.push_back(name); | |
2725 | } | |
2726 | } | |
2727 | ||
2728 | // Iterator for unused global symbols in the library. | |
2729 | void | |
2730 | Incremental_library::do_for_all_unused_symbols(Symbol_visitor_base* v) const | |
2731 | { | |
2732 | for (Symbol_list::const_iterator p = this->unused_symbols_.begin(); | |
2733 | p != this->unused_symbols_.end(); | |
2734 | ++p) | |
2735 | v->visit(p->c_str()); | |
2736 | } | |
2737 | ||
c549a694 ILT |
2738 | // Instantiate the templates we need. |
2739 | ||
2740 | #ifdef HAVE_TARGET_32_LITTLE | |
2741 | template | |
2742 | class Sized_incremental_binary<32, false>; | |
cdc29364 CC |
2743 | |
2744 | template | |
6fa2a40b | 2745 | class Sized_relobj_incr<32, false>; |
cdc29364 CC |
2746 | |
2747 | template | |
2748 | class Sized_incr_dynobj<32, false>; | |
c549a694 ILT |
2749 | #endif |
2750 | ||
2751 | #ifdef HAVE_TARGET_32_BIG | |
2752 | template | |
2753 | class Sized_incremental_binary<32, true>; | |
cdc29364 CC |
2754 | |
2755 | template | |
6fa2a40b | 2756 | class Sized_relobj_incr<32, true>; |
cdc29364 CC |
2757 | |
2758 | template | |
2759 | class Sized_incr_dynobj<32, true>; | |
c549a694 ILT |
2760 | #endif |
2761 | ||
2762 | #ifdef HAVE_TARGET_64_LITTLE | |
2763 | template | |
2764 | class Sized_incremental_binary<64, false>; | |
cdc29364 CC |
2765 | |
2766 | template | |
6fa2a40b | 2767 | class Sized_relobj_incr<64, false>; |
cdc29364 CC |
2768 | |
2769 | template | |
2770 | class Sized_incr_dynobj<64, false>; | |
c549a694 ILT |
2771 | #endif |
2772 | ||
2773 | #ifdef HAVE_TARGET_64_BIG | |
2774 | template | |
2775 | class Sized_incremental_binary<64, true>; | |
cdc29364 CC |
2776 | |
2777 | template | |
6fa2a40b | 2778 | class Sized_relobj_incr<64, true>; |
cdc29364 CC |
2779 | |
2780 | template | |
2781 | class Sized_incr_dynobj<64, true>; | |
c549a694 ILT |
2782 | #endif |
2783 | ||
0e879927 | 2784 | } // End namespace gold. |