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494e05f4 ILT |
1 | // script-sections.cc -- linker script SECTIONS for gold |
2 | ||
0d371ad3 | 3 | // Copyright 2008, 2009 Free Software Foundation, Inc. |
494e05f4 ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | #include "gold.h" | |
24 | ||
a445fddf ILT |
25 | #include <cstring> |
26 | #include <algorithm> | |
27 | #include <list> | |
1c4f3631 | 28 | #include <map> |
494e05f4 ILT |
29 | #include <string> |
30 | #include <vector> | |
a445fddf | 31 | #include <fnmatch.h> |
494e05f4 | 32 | |
a445fddf ILT |
33 | #include "parameters.h" |
34 | #include "object.h" | |
35 | #include "layout.h" | |
36 | #include "output.h" | |
494e05f4 ILT |
37 | #include "script-c.h" |
38 | #include "script.h" | |
39 | #include "script-sections.h" | |
40 | ||
41 | // Support for the SECTIONS clause in linker scripts. | |
42 | ||
43 | namespace gold | |
44 | { | |
45 | ||
7f8cd844 NC |
46 | // A region of memory. |
47 | class Memory_region | |
48 | { | |
49 | public: | |
50 | Memory_region(const char* name, size_t namelen, unsigned int attributes, | |
51 | Expression* start, Expression* length) | |
52 | : name_(name, namelen), | |
53 | attributes_(attributes), | |
54 | start_(start), | |
55 | length_(length), | |
56 | current_vma_offset_(0), | |
57 | current_lma_offset_(0), | |
4ef28648 CC |
58 | vma_sections_(), |
59 | lma_sections_() | |
7f8cd844 NC |
60 | { } |
61 | ||
62 | // Return the name of this region. | |
63 | const std::string& | |
64 | name() const | |
65 | { return this->name_; } | |
66 | ||
67 | // Return the start address of this region. | |
68 | Expression* | |
69 | start_address() const | |
70 | { return this->start_; } | |
71 | ||
72 | // Return the length of this region. | |
73 | Expression* | |
74 | length() const | |
75 | { return this->length_; } | |
76 | ||
77 | // Print the region (when debugging). | |
78 | void | |
79 | print(FILE*) const; | |
80 | ||
81 | // Return true if <name,namelen> matches this region. | |
82 | bool | |
83 | name_match(const char* name, size_t namelen) | |
84 | { | |
85 | return (this->name_.length() == namelen | |
86 | && strncmp(this->name_.c_str(), name, namelen) == 0); | |
87 | } | |
88 | ||
89 | Expression* | |
90 | get_current_vma_address(void) const | |
91 | { | |
92 | return | |
93 | script_exp_binary_add(this->start_, | |
94 | script_exp_integer(this->current_vma_offset_)); | |
95 | } | |
96 | ||
97 | Expression* | |
98 | get_current_lma_address(void) const | |
99 | { | |
100 | return | |
101 | script_exp_binary_add(this->start_, | |
102 | script_exp_integer(this->current_lma_offset_)); | |
103 | } | |
104 | ||
105 | void | |
106 | increment_vma_offset(std::string section_name, uint64_t amount, | |
107 | const Symbol_table* symtab, const Layout* layout) | |
108 | { | |
109 | this->current_vma_offset_ += amount; | |
110 | ||
111 | if (this->current_vma_offset_ | |
112 | > this->length_->eval(symtab, layout, false)) | |
113 | gold_error (_("section %s overflows end of region %s"), | |
114 | section_name.c_str(), this->name_.c_str()); | |
115 | } | |
116 | ||
117 | void | |
118 | increment_lma_offset(std::string section_name, uint64_t amount, | |
119 | const Symbol_table* symtab, const Layout* layout) | |
120 | { | |
121 | this->current_lma_offset_ += amount; | |
122 | ||
123 | if (this->current_lma_offset_ | |
124 | > this->length_->eval(symtab, layout, false)) | |
125 | gold_error (_("section %s overflows end of region %s (based on load address)"), | |
126 | section_name.c_str(), this->name_.c_str()); | |
127 | } | |
128 | ||
129 | void | |
130 | add_section(Output_section_definition* sec, bool vma) | |
131 | { | |
132 | if (vma) | |
133 | this->vma_sections_.push_back(sec); | |
134 | else | |
135 | this->lma_sections_.push_back(sec); | |
136 | } | |
137 | ||
138 | typedef std::vector<Output_section_definition*> Section_list; | |
139 | ||
140 | // Return the start of the list of sections | |
141 | // whose VMAs are taken from this region. | |
142 | Section_list::const_iterator | |
143 | get_vma_section_list_start(void) const | |
144 | { return this->vma_sections_.begin(); } | |
145 | ||
146 | // Return the start of the list of sections | |
147 | // whose LMAs are taken from this region. | |
148 | Section_list::const_iterator | |
149 | get_lma_section_list_start(void) const | |
150 | { return this->lma_sections_.begin(); } | |
151 | ||
152 | // Return the end of the list of sections | |
153 | // whose VMAs are taken from this region. | |
154 | Section_list::const_iterator | |
155 | get_vma_section_list_end(void) const | |
156 | { return this->vma_sections_.end(); } | |
157 | ||
158 | // Return the end of the list of sections | |
159 | // whose LMAs are taken from this region. | |
160 | Section_list::const_iterator | |
161 | get_lma_section_list_end(void) const | |
162 | { return this->lma_sections_.end(); } | |
163 | ||
164 | private: | |
165 | ||
166 | std::string name_; | |
167 | unsigned int attributes_; | |
168 | Expression* start_; | |
169 | Expression* length_; | |
170 | uint64_t current_vma_offset_; | |
171 | uint64_t current_lma_offset_; | |
172 | // A list of sections whose VMAs are set inside this region. | |
173 | Section_list vma_sections_; | |
174 | // A list of sections whose LMAs are set inside this region. | |
175 | Section_list lma_sections_; | |
176 | }; | |
177 | ||
178 | // Print a memory region. | |
179 | ||
180 | void | |
181 | Memory_region::print(FILE* f) const | |
182 | { | |
183 | fprintf(f, " %s", this->name_.c_str()); | |
184 | ||
185 | unsigned int attrs = this->attributes_; | |
186 | if (attrs != 0) | |
187 | { | |
188 | fprintf(f, " ("); | |
189 | do | |
190 | { | |
191 | switch (attrs & - attrs) | |
192 | { | |
193 | case MEM_EXECUTABLE: fputc('x', f); break; | |
194 | case MEM_WRITEABLE: fputc('w', f); break; | |
195 | case MEM_READABLE: fputc('r', f); break; | |
196 | case MEM_ALLOCATABLE: fputc('a', f); break; | |
197 | case MEM_INITIALIZED: fputc('i', f); break; | |
198 | default: | |
199 | gold_unreachable(); | |
200 | } | |
201 | attrs &= ~ (attrs & - attrs); | |
202 | } | |
203 | while (attrs != 0); | |
204 | fputc(')', f); | |
205 | } | |
206 | ||
207 | fprintf(f, " : origin = "); | |
208 | this->start_->print(f); | |
209 | fprintf(f, ", length = "); | |
210 | this->length_->print(f); | |
211 | fprintf(f, "\n"); | |
212 | } | |
213 | ||
0d371ad3 ILT |
214 | // Manage orphan sections. This is intended to be largely compatible |
215 | // with the GNU linker. The Linux kernel implicitly relies on | |
216 | // something similar to the GNU linker's orphan placement. We | |
217 | // originally used a simpler scheme here, but it caused the kernel | |
218 | // build to fail, and was also rather inefficient. | |
219 | ||
220 | class Orphan_section_placement | |
221 | { | |
222 | private: | |
223 | typedef Script_sections::Elements_iterator Elements_iterator; | |
224 | ||
225 | public: | |
226 | Orphan_section_placement(); | |
227 | ||
228 | // Handle an output section during initialization of this mapping. | |
229 | void | |
230 | output_section_init(const std::string& name, Output_section*, | |
231 | Elements_iterator location); | |
232 | ||
233 | // Initialize the last location. | |
234 | void | |
235 | last_init(Elements_iterator location); | |
236 | ||
237 | // Set *PWHERE to the address of an iterator pointing to the | |
238 | // location to use for an orphan section. Return true if the | |
239 | // iterator has a value, false otherwise. | |
240 | bool | |
241 | find_place(Output_section*, Elements_iterator** pwhere); | |
242 | ||
243 | // Return the iterator being used for sections at the very end of | |
244 | // the linker script. | |
245 | Elements_iterator | |
246 | last_place() const; | |
247 | ||
248 | private: | |
249 | // The places that we specifically recognize. This list is copied | |
250 | // from the GNU linker. | |
251 | enum Place_index | |
252 | { | |
253 | PLACE_TEXT, | |
254 | PLACE_RODATA, | |
255 | PLACE_DATA, | |
6c93b22c ILT |
256 | PLACE_TLS, |
257 | PLACE_TLS_BSS, | |
0d371ad3 ILT |
258 | PLACE_BSS, |
259 | PLACE_REL, | |
260 | PLACE_INTERP, | |
261 | PLACE_NONALLOC, | |
262 | PLACE_LAST, | |
263 | PLACE_MAX | |
264 | }; | |
265 | ||
266 | // The information we keep for a specific place. | |
267 | struct Place | |
268 | { | |
269 | // The name of sections for this place. | |
270 | const char* name; | |
271 | // Whether we have a location for this place. | |
272 | bool have_location; | |
273 | // The iterator for this place. | |
274 | Elements_iterator location; | |
275 | }; | |
276 | ||
277 | // Initialize one place element. | |
278 | void | |
279 | initialize_place(Place_index, const char*); | |
280 | ||
281 | // The places. | |
282 | Place places_[PLACE_MAX]; | |
283 | // True if this is the first call to output_section_init. | |
284 | bool first_init_; | |
285 | }; | |
286 | ||
287 | // Initialize Orphan_section_placement. | |
288 | ||
289 | Orphan_section_placement::Orphan_section_placement() | |
290 | : first_init_(true) | |
291 | { | |
292 | this->initialize_place(PLACE_TEXT, ".text"); | |
293 | this->initialize_place(PLACE_RODATA, ".rodata"); | |
294 | this->initialize_place(PLACE_DATA, ".data"); | |
6c93b22c ILT |
295 | this->initialize_place(PLACE_TLS, NULL); |
296 | this->initialize_place(PLACE_TLS_BSS, NULL); | |
0d371ad3 ILT |
297 | this->initialize_place(PLACE_BSS, ".bss"); |
298 | this->initialize_place(PLACE_REL, NULL); | |
299 | this->initialize_place(PLACE_INTERP, ".interp"); | |
300 | this->initialize_place(PLACE_NONALLOC, NULL); | |
301 | this->initialize_place(PLACE_LAST, NULL); | |
302 | } | |
303 | ||
304 | // Initialize one place element. | |
305 | ||
306 | void | |
307 | Orphan_section_placement::initialize_place(Place_index index, const char* name) | |
308 | { | |
309 | this->places_[index].name = name; | |
310 | this->places_[index].have_location = false; | |
311 | } | |
312 | ||
313 | // While initializing the Orphan_section_placement information, this | |
314 | // is called once for each output section named in the linker script. | |
315 | // If we found an output section during the link, it will be passed in | |
316 | // OS. | |
317 | ||
318 | void | |
319 | Orphan_section_placement::output_section_init(const std::string& name, | |
320 | Output_section* os, | |
321 | Elements_iterator location) | |
322 | { | |
323 | bool first_init = this->first_init_; | |
324 | this->first_init_ = false; | |
325 | ||
326 | for (int i = 0; i < PLACE_MAX; ++i) | |
327 | { | |
328 | if (this->places_[i].name != NULL && this->places_[i].name == name) | |
329 | { | |
330 | if (this->places_[i].have_location) | |
331 | { | |
332 | // We have already seen a section with this name. | |
333 | return; | |
334 | } | |
335 | ||
336 | this->places_[i].location = location; | |
337 | this->places_[i].have_location = true; | |
338 | ||
339 | // If we just found the .bss section, restart the search for | |
340 | // an unallocated section. This follows the GNU linker's | |
341 | // behaviour. | |
342 | if (i == PLACE_BSS) | |
343 | this->places_[PLACE_NONALLOC].have_location = false; | |
344 | ||
345 | return; | |
346 | } | |
347 | } | |
348 | ||
349 | // Relocation sections. | |
350 | if (!this->places_[PLACE_REL].have_location | |
351 | && os != NULL | |
352 | && (os->type() == elfcpp::SHT_REL || os->type() == elfcpp::SHT_RELA) | |
353 | && (os->flags() & elfcpp::SHF_ALLOC) != 0) | |
354 | { | |
355 | this->places_[PLACE_REL].location = location; | |
356 | this->places_[PLACE_REL].have_location = true; | |
357 | } | |
358 | ||
359 | // We find the location for unallocated sections by finding the | |
360 | // first debugging or comment section after the BSS section (if | |
361 | // there is one). | |
362 | if (!this->places_[PLACE_NONALLOC].have_location | |
363 | && (name == ".comment" || Layout::is_debug_info_section(name.c_str()))) | |
364 | { | |
365 | // We add orphan sections after the location in PLACES_. We | |
366 | // want to store unallocated sections before LOCATION. If this | |
367 | // is the very first section, we can't use it. | |
368 | if (!first_init) | |
369 | { | |
370 | --location; | |
371 | this->places_[PLACE_NONALLOC].location = location; | |
372 | this->places_[PLACE_NONALLOC].have_location = true; | |
373 | } | |
374 | } | |
375 | } | |
376 | ||
377 | // Initialize the last location. | |
378 | ||
379 | void | |
380 | Orphan_section_placement::last_init(Elements_iterator location) | |
381 | { | |
382 | this->places_[PLACE_LAST].location = location; | |
383 | this->places_[PLACE_LAST].have_location = true; | |
384 | } | |
385 | ||
386 | // Set *PWHERE to the address of an iterator pointing to the location | |
387 | // to use for an orphan section. Return true if the iterator has a | |
388 | // value, false otherwise. | |
389 | ||
390 | bool | |
391 | Orphan_section_placement::find_place(Output_section* os, | |
392 | Elements_iterator** pwhere) | |
393 | { | |
394 | // Figure out where OS should go. This is based on the GNU linker | |
395 | // code. FIXME: The GNU linker handles small data sections | |
396 | // specially, but we don't. | |
397 | elfcpp::Elf_Word type = os->type(); | |
398 | elfcpp::Elf_Xword flags = os->flags(); | |
399 | Place_index index; | |
400 | if ((flags & elfcpp::SHF_ALLOC) == 0 | |
401 | && !Layout::is_debug_info_section(os->name())) | |
402 | index = PLACE_NONALLOC; | |
403 | else if ((flags & elfcpp::SHF_ALLOC) == 0) | |
404 | index = PLACE_LAST; | |
405 | else if (type == elfcpp::SHT_NOTE) | |
406 | index = PLACE_INTERP; | |
6c93b22c ILT |
407 | else if ((flags & elfcpp::SHF_TLS) != 0) |
408 | { | |
409 | if (type == elfcpp::SHT_NOBITS) | |
410 | index = PLACE_TLS_BSS; | |
411 | else | |
412 | index = PLACE_TLS; | |
413 | } | |
0d371ad3 ILT |
414 | else if (type == elfcpp::SHT_NOBITS) |
415 | index = PLACE_BSS; | |
416 | else if ((flags & elfcpp::SHF_WRITE) != 0) | |
417 | index = PLACE_DATA; | |
418 | else if (type == elfcpp::SHT_REL || type == elfcpp::SHT_RELA) | |
419 | index = PLACE_REL; | |
420 | else if ((flags & elfcpp::SHF_EXECINSTR) == 0) | |
421 | index = PLACE_RODATA; | |
422 | else | |
423 | index = PLACE_TEXT; | |
424 | ||
425 | // If we don't have a location yet, try to find one based on a | |
426 | // plausible ordering of sections. | |
427 | if (!this->places_[index].have_location) | |
428 | { | |
429 | Place_index follow; | |
430 | switch (index) | |
431 | { | |
432 | default: | |
433 | follow = PLACE_MAX; | |
434 | break; | |
435 | case PLACE_RODATA: | |
436 | follow = PLACE_TEXT; | |
437 | break; | |
438 | case PLACE_BSS: | |
439 | follow = PLACE_DATA; | |
440 | break; | |
441 | case PLACE_REL: | |
442 | follow = PLACE_TEXT; | |
443 | break; | |
444 | case PLACE_INTERP: | |
445 | follow = PLACE_TEXT; | |
446 | break; | |
6c93b22c ILT |
447 | case PLACE_TLS: |
448 | follow = PLACE_DATA; | |
449 | break; | |
450 | case PLACE_TLS_BSS: | |
451 | follow = PLACE_TLS; | |
452 | if (!this->places_[PLACE_TLS].have_location) | |
453 | follow = PLACE_DATA; | |
454 | break; | |
0d371ad3 ILT |
455 | } |
456 | if (follow != PLACE_MAX && this->places_[follow].have_location) | |
457 | { | |
458 | // Set the location of INDEX to the location of FOLLOW. The | |
459 | // location of INDEX will then be incremented by the caller, | |
460 | // so anything in INDEX will continue to be after anything | |
461 | // in FOLLOW. | |
462 | this->places_[index].location = this->places_[follow].location; | |
463 | this->places_[index].have_location = true; | |
464 | } | |
465 | } | |
466 | ||
467 | *pwhere = &this->places_[index].location; | |
468 | bool ret = this->places_[index].have_location; | |
469 | ||
470 | // The caller will set the location. | |
471 | this->places_[index].have_location = true; | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
476 | // Return the iterator being used for sections at the very end of the | |
477 | // linker script. | |
478 | ||
479 | Orphan_section_placement::Elements_iterator | |
480 | Orphan_section_placement::last_place() const | |
481 | { | |
482 | gold_assert(this->places_[PLACE_LAST].have_location); | |
483 | return this->places_[PLACE_LAST].location; | |
484 | } | |
485 | ||
494e05f4 ILT |
486 | // An element in a SECTIONS clause. |
487 | ||
488 | class Sections_element | |
489 | { | |
490 | public: | |
491 | Sections_element() | |
492 | { } | |
493 | ||
494 | virtual ~Sections_element() | |
495 | { } | |
496 | ||
0d371ad3 ILT |
497 | // Return whether an output section is relro. |
498 | virtual bool | |
499 | is_relro() const | |
500 | { return false; } | |
501 | ||
2d924fd9 ILT |
502 | // Record that an output section is relro. |
503 | virtual void | |
504 | set_is_relro() | |
505 | { } | |
506 | ||
919ed24c ILT |
507 | // Create any required output sections. The only real |
508 | // implementation is in Output_section_definition. | |
509 | virtual void | |
510 | create_sections(Layout*) | |
511 | { } | |
512 | ||
a445fddf ILT |
513 | // Add any symbol being defined to the symbol table. |
514 | virtual void | |
515 | add_symbols_to_table(Symbol_table*) | |
516 | { } | |
517 | ||
518 | // Finalize symbols and check assertions. | |
519 | virtual void | |
77e65537 | 520 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*) |
a445fddf ILT |
521 | { } |
522 | ||
523 | // Return the output section name to use for an input file name and | |
524 | // section name. This only real implementation is in | |
525 | // Output_section_definition. | |
526 | virtual const char* | |
1e5d2fb1 DK |
527 | output_section_name(const char*, const char*, Output_section***, |
528 | Script_sections::Section_type*) | |
a445fddf ILT |
529 | { return NULL; } |
530 | ||
0d371ad3 ILT |
531 | // Initialize OSP with an output section. |
532 | virtual void | |
533 | orphan_section_init(Orphan_section_placement*, | |
534 | Script_sections::Elements_iterator) | |
535 | { } | |
a445fddf ILT |
536 | |
537 | // Set section addresses. This includes applying assignments if the | |
538 | // the expression is an absolute value. | |
539 | virtual void | |
f6973bdc ILT |
540 | set_section_addresses(Symbol_table*, Layout*, uint64_t*, uint64_t*, |
541 | uint64_t*) | |
a445fddf ILT |
542 | { } |
543 | ||
3802b2dd ILT |
544 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
545 | // this section is constrained, and the input sections do not match, | |
546 | // return the constraint, and set *POSD. | |
547 | virtual Section_constraint | |
548 | check_constraint(Output_section_definition**) | |
549 | { return CONSTRAINT_NONE; } | |
550 | ||
551 | // See if this is the alternate output section for a constrained | |
552 | // output section. If it is, transfer the Output_section and return | |
553 | // true. Otherwise return false. | |
554 | virtual bool | |
555 | alternate_constraint(Output_section_definition*, Section_constraint) | |
556 | { return false; } | |
557 | ||
1c4f3631 ILT |
558 | // Get the list of segments to use for an allocated section when |
559 | // using a PHDRS clause. If this is an allocated section, return | |
2cefc357 ILT |
560 | // the Output_section, and set *PHDRS_LIST (the first parameter) to |
561 | // the list of PHDRS to which it should be attached. If the PHDRS | |
562 | // were not specified, don't change *PHDRS_LIST. When not returning | |
563 | // NULL, set *ORPHAN (the second parameter) according to whether | |
564 | // this is an orphan section--one that is not mentioned in the | |
565 | // linker script. | |
1c4f3631 | 566 | virtual Output_section* |
2cefc357 | 567 | allocate_to_segment(String_list**, bool*) |
1c4f3631 ILT |
568 | { return NULL; } |
569 | ||
8f2eb564 ILT |
570 | // Look for an output section by name and return the address, the |
571 | // load address, the alignment, and the size. This is used when an | |
572 | // expression refers to an output section which was not actually | |
573 | // created. This returns true if the section was found, false | |
574 | // otherwise. The only real definition is for | |
575 | // Output_section_definition. | |
576 | virtual bool | |
577 | get_output_section_info(const char*, uint64_t*, uint64_t*, uint64_t*, | |
578 | uint64_t*) const | |
579 | { return false; } | |
580 | ||
2d924fd9 ILT |
581 | // Return the associated Output_section if there is one. |
582 | virtual Output_section* | |
583 | get_output_section() const | |
584 | { return NULL; } | |
585 | ||
7f8cd844 NC |
586 | // Set the section's memory regions. |
587 | virtual void | |
588 | set_memory_region(Memory_region*, bool) | |
589 | { gold_error(_("Attempt to set a memory region for a non-output section")); } | |
590 | ||
a445fddf | 591 | // Print the element for debugging purposes. |
494e05f4 ILT |
592 | virtual void |
593 | print(FILE* f) const = 0; | |
594 | }; | |
595 | ||
596 | // An assignment in a SECTIONS clause outside of an output section. | |
597 | ||
598 | class Sections_element_assignment : public Sections_element | |
599 | { | |
600 | public: | |
601 | Sections_element_assignment(const char* name, size_t namelen, | |
602 | Expression* val, bool provide, bool hidden) | |
99fff23b | 603 | : assignment_(name, namelen, false, val, provide, hidden) |
494e05f4 ILT |
604 | { } |
605 | ||
a445fddf ILT |
606 | // Add the symbol to the symbol table. |
607 | void | |
608 | add_symbols_to_table(Symbol_table* symtab) | |
609 | { this->assignment_.add_to_table(symtab); } | |
610 | ||
611 | // Finalize the symbol. | |
612 | void | |
613 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 614 | uint64_t* dot_value) |
a445fddf | 615 | { |
77e65537 | 616 | this->assignment_.finalize_with_dot(symtab, layout, *dot_value, NULL); |
a445fddf ILT |
617 | } |
618 | ||
619 | // Set the section address. There is no section here, but if the | |
620 | // value is absolute, we set the symbol. This permits us to use | |
621 | // absolute symbols when setting dot. | |
622 | void | |
623 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc | 624 | uint64_t* dot_value, uint64_t*, uint64_t*) |
a445fddf | 625 | { |
77e65537 | 626 | this->assignment_.set_if_absolute(symtab, layout, true, *dot_value); |
a445fddf ILT |
627 | } |
628 | ||
629 | // Print for debugging. | |
494e05f4 ILT |
630 | void |
631 | print(FILE* f) const | |
632 | { | |
633 | fprintf(f, " "); | |
634 | this->assignment_.print(f); | |
635 | } | |
636 | ||
637 | private: | |
638 | Symbol_assignment assignment_; | |
639 | }; | |
640 | ||
a445fddf ILT |
641 | // An assignment to the dot symbol in a SECTIONS clause outside of an |
642 | // output section. | |
643 | ||
644 | class Sections_element_dot_assignment : public Sections_element | |
645 | { | |
646 | public: | |
647 | Sections_element_dot_assignment(Expression* val) | |
648 | : val_(val) | |
649 | { } | |
650 | ||
651 | // Finalize the symbol. | |
652 | void | |
653 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 654 | uint64_t* dot_value) |
a445fddf | 655 | { |
77e65537 ILT |
656 | // We ignore the section of the result because outside of an |
657 | // output section definition the dot symbol is always considered | |
658 | // to be absolute. | |
659 | Output_section* dummy; | |
919ed24c | 660 | *dot_value = this->val_->eval_with_dot(symtab, layout, true, *dot_value, |
f6973bdc | 661 | NULL, &dummy, NULL); |
a445fddf ILT |
662 | } |
663 | ||
664 | // Update the dot symbol while setting section addresses. | |
665 | void | |
666 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc ILT |
667 | uint64_t* dot_value, uint64_t* dot_alignment, |
668 | uint64_t* load_address) | |
a445fddf | 669 | { |
77e65537 | 670 | Output_section* dummy; |
919ed24c | 671 | *dot_value = this->val_->eval_with_dot(symtab, layout, false, *dot_value, |
f6973bdc | 672 | NULL, &dummy, dot_alignment); |
fd247bfe | 673 | *load_address = *dot_value; |
a445fddf ILT |
674 | } |
675 | ||
676 | // Print for debugging. | |
677 | void | |
678 | print(FILE* f) const | |
679 | { | |
680 | fprintf(f, " . = "); | |
681 | this->val_->print(f); | |
682 | fprintf(f, "\n"); | |
683 | } | |
684 | ||
685 | private: | |
686 | Expression* val_; | |
687 | }; | |
688 | ||
494e05f4 ILT |
689 | // An assertion in a SECTIONS clause outside of an output section. |
690 | ||
691 | class Sections_element_assertion : public Sections_element | |
692 | { | |
693 | public: | |
694 | Sections_element_assertion(Expression* check, const char* message, | |
695 | size_t messagelen) | |
696 | : assertion_(check, message, messagelen) | |
697 | { } | |
698 | ||
a445fddf ILT |
699 | // Check the assertion. |
700 | void | |
77e65537 | 701 | finalize_symbols(Symbol_table* symtab, const Layout* layout, uint64_t*) |
a445fddf ILT |
702 | { this->assertion_.check(symtab, layout); } |
703 | ||
704 | // Print for debugging. | |
494e05f4 ILT |
705 | void |
706 | print(FILE* f) const | |
707 | { | |
708 | fprintf(f, " "); | |
709 | this->assertion_.print(f); | |
710 | } | |
711 | ||
712 | private: | |
713 | Script_assertion assertion_; | |
714 | }; | |
715 | ||
716 | // An element in an output section in a SECTIONS clause. | |
717 | ||
718 | class Output_section_element | |
719 | { | |
720 | public: | |
a445fddf | 721 | // A list of input sections. |
6625d24e | 722 | typedef std::list<Output_section::Input_section> Input_section_list; |
a445fddf | 723 | |
494e05f4 ILT |
724 | Output_section_element() |
725 | { } | |
726 | ||
727 | virtual ~Output_section_element() | |
728 | { } | |
729 | ||
919ed24c ILT |
730 | // Return whether this element requires an output section to exist. |
731 | virtual bool | |
732 | needs_output_section() const | |
733 | { return false; } | |
734 | ||
a445fddf ILT |
735 | // Add any symbol being defined to the symbol table. |
736 | virtual void | |
737 | add_symbols_to_table(Symbol_table*) | |
738 | { } | |
739 | ||
740 | // Finalize symbols and check assertions. | |
741 | virtual void | |
77e65537 | 742 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*, Output_section**) |
a445fddf ILT |
743 | { } |
744 | ||
745 | // Return whether this element matches FILE_NAME and SECTION_NAME. | |
746 | // The only real implementation is in Output_section_element_input. | |
747 | virtual bool | |
748 | match_name(const char*, const char*) const | |
749 | { return false; } | |
750 | ||
751 | // Set section addresses. This includes applying assignments if the | |
752 | // the expression is an absolute value. | |
753 | virtual void | |
754 | set_section_addresses(Symbol_table*, Layout*, Output_section*, uint64_t, | |
f6973bdc | 755 | uint64_t*, uint64_t*, Output_section**, std::string*, |
77e65537 | 756 | Input_section_list*) |
a445fddf ILT |
757 | { } |
758 | ||
759 | // Print the element for debugging purposes. | |
494e05f4 ILT |
760 | virtual void |
761 | print(FILE* f) const = 0; | |
a445fddf ILT |
762 | |
763 | protected: | |
764 | // Return a fill string that is LENGTH bytes long, filling it with | |
765 | // FILL. | |
766 | std::string | |
767 | get_fill_string(const std::string* fill, section_size_type length) const; | |
494e05f4 ILT |
768 | }; |
769 | ||
a445fddf ILT |
770 | std::string |
771 | Output_section_element::get_fill_string(const std::string* fill, | |
772 | section_size_type length) const | |
773 | { | |
774 | std::string this_fill; | |
775 | this_fill.reserve(length); | |
776 | while (this_fill.length() + fill->length() <= length) | |
777 | this_fill += *fill; | |
778 | if (this_fill.length() < length) | |
779 | this_fill.append(*fill, 0, length - this_fill.length()); | |
780 | return this_fill; | |
781 | } | |
782 | ||
494e05f4 ILT |
783 | // A symbol assignment in an output section. |
784 | ||
785 | class Output_section_element_assignment : public Output_section_element | |
786 | { | |
787 | public: | |
788 | Output_section_element_assignment(const char* name, size_t namelen, | |
789 | Expression* val, bool provide, | |
790 | bool hidden) | |
99fff23b | 791 | : assignment_(name, namelen, false, val, provide, hidden) |
494e05f4 ILT |
792 | { } |
793 | ||
a445fddf ILT |
794 | // Add the symbol to the symbol table. |
795 | void | |
796 | add_symbols_to_table(Symbol_table* symtab) | |
797 | { this->assignment_.add_to_table(symtab); } | |
798 | ||
799 | // Finalize the symbol. | |
800 | void | |
801 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 802 | uint64_t* dot_value, Output_section** dot_section) |
a445fddf | 803 | { |
77e65537 ILT |
804 | this->assignment_.finalize_with_dot(symtab, layout, *dot_value, |
805 | *dot_section); | |
a445fddf ILT |
806 | } |
807 | ||
808 | // Set the section address. There is no section here, but if the | |
809 | // value is absolute, we set the symbol. This permits us to use | |
810 | // absolute symbols when setting dot. | |
811 | void | |
812 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc ILT |
813 | uint64_t, uint64_t* dot_value, uint64_t*, |
814 | Output_section**, std::string*, Input_section_list*) | |
a445fddf | 815 | { |
77e65537 | 816 | this->assignment_.set_if_absolute(symtab, layout, true, *dot_value); |
a445fddf ILT |
817 | } |
818 | ||
819 | // Print for debugging. | |
494e05f4 ILT |
820 | void |
821 | print(FILE* f) const | |
822 | { | |
823 | fprintf(f, " "); | |
824 | this->assignment_.print(f); | |
825 | } | |
826 | ||
827 | private: | |
828 | Symbol_assignment assignment_; | |
829 | }; | |
830 | ||
a445fddf ILT |
831 | // An assignment to the dot symbol in an output section. |
832 | ||
833 | class Output_section_element_dot_assignment : public Output_section_element | |
834 | { | |
835 | public: | |
836 | Output_section_element_dot_assignment(Expression* val) | |
837 | : val_(val) | |
838 | { } | |
839 | ||
840 | // Finalize the symbol. | |
841 | void | |
842 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 843 | uint64_t* dot_value, Output_section** dot_section) |
a445fddf | 844 | { |
919ed24c | 845 | *dot_value = this->val_->eval_with_dot(symtab, layout, true, *dot_value, |
f6973bdc | 846 | *dot_section, dot_section, NULL); |
a445fddf ILT |
847 | } |
848 | ||
849 | // Update the dot symbol while setting section addresses. | |
850 | void | |
851 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc ILT |
852 | uint64_t, uint64_t* dot_value, uint64_t*, |
853 | Output_section**, std::string*, Input_section_list*); | |
a445fddf ILT |
854 | |
855 | // Print for debugging. | |
856 | void | |
857 | print(FILE* f) const | |
858 | { | |
859 | fprintf(f, " . = "); | |
860 | this->val_->print(f); | |
861 | fprintf(f, "\n"); | |
862 | } | |
863 | ||
864 | private: | |
865 | Expression* val_; | |
866 | }; | |
867 | ||
868 | // Update the dot symbol while setting section addresses. | |
869 | ||
870 | void | |
871 | Output_section_element_dot_assignment::set_section_addresses( | |
872 | Symbol_table* symtab, | |
873 | Layout* layout, | |
874 | Output_section* output_section, | |
875 | uint64_t, | |
876 | uint64_t* dot_value, | |
f6973bdc | 877 | uint64_t* dot_alignment, |
77e65537 | 878 | Output_section** dot_section, |
a445fddf ILT |
879 | std::string* fill, |
880 | Input_section_list*) | |
881 | { | |
919ed24c ILT |
882 | uint64_t next_dot = this->val_->eval_with_dot(symtab, layout, false, |
883 | *dot_value, *dot_section, | |
f6973bdc | 884 | dot_section, dot_alignment); |
a445fddf ILT |
885 | if (next_dot < *dot_value) |
886 | gold_error(_("dot may not move backward")); | |
887 | if (next_dot > *dot_value && output_section != NULL) | |
888 | { | |
889 | section_size_type length = convert_to_section_size_type(next_dot | |
890 | - *dot_value); | |
891 | Output_section_data* posd; | |
892 | if (fill->empty()) | |
7d9e3d98 | 893 | posd = new Output_data_zero_fill(length, 0); |
a445fddf ILT |
894 | else |
895 | { | |
896 | std::string this_fill = this->get_fill_string(fill, length); | |
897 | posd = new Output_data_const(this_fill, 0); | |
898 | } | |
899 | output_section->add_output_section_data(posd); | |
20e6d0d6 | 900 | layout->new_output_section_data_from_script(posd); |
a445fddf ILT |
901 | } |
902 | *dot_value = next_dot; | |
903 | } | |
904 | ||
494e05f4 ILT |
905 | // An assertion in an output section. |
906 | ||
907 | class Output_section_element_assertion : public Output_section_element | |
908 | { | |
909 | public: | |
910 | Output_section_element_assertion(Expression* check, const char* message, | |
911 | size_t messagelen) | |
912 | : assertion_(check, message, messagelen) | |
913 | { } | |
914 | ||
915 | void | |
916 | print(FILE* f) const | |
917 | { | |
918 | fprintf(f, " "); | |
919 | this->assertion_.print(f); | |
920 | } | |
921 | ||
922 | private: | |
923 | Script_assertion assertion_; | |
924 | }; | |
925 | ||
77e65537 ILT |
926 | // We use a special instance of Output_section_data to handle BYTE, |
927 | // SHORT, etc. This permits forward references to symbols in the | |
928 | // expressions. | |
494e05f4 | 929 | |
77e65537 | 930 | class Output_data_expression : public Output_section_data |
494e05f4 ILT |
931 | { |
932 | public: | |
77e65537 ILT |
933 | Output_data_expression(int size, bool is_signed, Expression* val, |
934 | const Symbol_table* symtab, const Layout* layout, | |
935 | uint64_t dot_value, Output_section* dot_section) | |
20e6d0d6 | 936 | : Output_section_data(size, 0, true), |
77e65537 ILT |
937 | is_signed_(is_signed), val_(val), symtab_(symtab), |
938 | layout_(layout), dot_value_(dot_value), dot_section_(dot_section) | |
494e05f4 ILT |
939 | { } |
940 | ||
77e65537 ILT |
941 | protected: |
942 | // Write the data to the output file. | |
a445fddf | 943 | void |
77e65537 | 944 | do_write(Output_file*); |
a445fddf | 945 | |
77e65537 | 946 | // Write the data to a buffer. |
494e05f4 | 947 | void |
77e65537 | 948 | do_write_to_buffer(unsigned char*); |
494e05f4 | 949 | |
7d9e3d98 ILT |
950 | // Write to a map file. |
951 | void | |
952 | do_print_to_mapfile(Mapfile* mapfile) const | |
953 | { mapfile->print_output_data(this, _("** expression")); } | |
954 | ||
494e05f4 | 955 | private: |
a445fddf | 956 | template<bool big_endian> |
77e65537 ILT |
957 | void |
958 | endian_write_to_buffer(uint64_t, unsigned char*); | |
a445fddf | 959 | |
494e05f4 | 960 | bool is_signed_; |
494e05f4 | 961 | Expression* val_; |
77e65537 ILT |
962 | const Symbol_table* symtab_; |
963 | const Layout* layout_; | |
964 | uint64_t dot_value_; | |
965 | Output_section* dot_section_; | |
494e05f4 ILT |
966 | }; |
967 | ||
77e65537 | 968 | // Write the data element to the output file. |
a445fddf ILT |
969 | |
970 | void | |
77e65537 | 971 | Output_data_expression::do_write(Output_file* of) |
a445fddf | 972 | { |
77e65537 ILT |
973 | unsigned char* view = of->get_output_view(this->offset(), this->data_size()); |
974 | this->write_to_buffer(view); | |
975 | of->write_output_view(this->offset(), this->data_size(), view); | |
976 | } | |
a445fddf | 977 | |
77e65537 ILT |
978 | // Write the data element to a buffer. |
979 | ||
980 | void | |
981 | Output_data_expression::do_write_to_buffer(unsigned char* buf) | |
982 | { | |
983 | Output_section* dummy; | |
984 | uint64_t val = this->val_->eval_with_dot(this->symtab_, this->layout_, | |
919ed24c | 985 | true, this->dot_value_, |
f6973bdc | 986 | this->dot_section_, &dummy, NULL); |
a445fddf | 987 | |
8851ecca | 988 | if (parameters->target().is_big_endian()) |
77e65537 | 989 | this->endian_write_to_buffer<true>(val, buf); |
a445fddf | 990 | else |
77e65537 | 991 | this->endian_write_to_buffer<false>(val, buf); |
a445fddf ILT |
992 | } |
993 | ||
a445fddf | 994 | template<bool big_endian> |
77e65537 ILT |
995 | void |
996 | Output_data_expression::endian_write_to_buffer(uint64_t val, | |
997 | unsigned char* buf) | |
a445fddf | 998 | { |
77e65537 | 999 | switch (this->data_size()) |
a445fddf ILT |
1000 | { |
1001 | case 1: | |
1002 | elfcpp::Swap_unaligned<8, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1003 | break; |
1004 | case 2: | |
1005 | elfcpp::Swap_unaligned<16, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1006 | break; |
1007 | case 4: | |
1008 | elfcpp::Swap_unaligned<32, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1009 | break; |
1010 | case 8: | |
8851ecca | 1011 | if (parameters->target().get_size() == 32) |
a445fddf ILT |
1012 | { |
1013 | val &= 0xffffffff; | |
1014 | if (this->is_signed_ && (val & 0x80000000) != 0) | |
1015 | val |= 0xffffffff00000000LL; | |
1016 | } | |
1017 | elfcpp::Swap_unaligned<64, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1018 | break; |
1019 | default: | |
1020 | gold_unreachable(); | |
1021 | } | |
77e65537 ILT |
1022 | } |
1023 | ||
1024 | // A data item in an output section. | |
1025 | ||
1026 | class Output_section_element_data : public Output_section_element | |
1027 | { | |
1028 | public: | |
1029 | Output_section_element_data(int size, bool is_signed, Expression* val) | |
1030 | : size_(size), is_signed_(is_signed), val_(val) | |
1031 | { } | |
1032 | ||
919ed24c ILT |
1033 | // If there is a data item, then we must create an output section. |
1034 | bool | |
1035 | needs_output_section() const | |
1036 | { return true; } | |
1037 | ||
77e65537 ILT |
1038 | // Finalize symbols--we just need to update dot. |
1039 | void | |
1040 | finalize_symbols(Symbol_table*, const Layout*, uint64_t* dot_value, | |
1041 | Output_section**) | |
1042 | { *dot_value += this->size_; } | |
1043 | ||
1044 | // Store the value in the section. | |
1045 | void | |
1046 | set_section_addresses(Symbol_table*, Layout*, Output_section*, uint64_t, | |
f6973bdc ILT |
1047 | uint64_t* dot_value, uint64_t*, Output_section**, |
1048 | std::string*, Input_section_list*); | |
77e65537 ILT |
1049 | |
1050 | // Print for debugging. | |
1051 | void | |
1052 | print(FILE*) const; | |
1053 | ||
1054 | private: | |
1055 | // The size in bytes. | |
1056 | int size_; | |
1057 | // Whether the value is signed. | |
1058 | bool is_signed_; | |
1059 | // The value. | |
1060 | Expression* val_; | |
1061 | }; | |
1062 | ||
1063 | // Store the value in the section. | |
1064 | ||
1065 | void | |
1066 | Output_section_element_data::set_section_addresses( | |
1067 | Symbol_table* symtab, | |
1068 | Layout* layout, | |
1069 | Output_section* os, | |
1070 | uint64_t, | |
1071 | uint64_t* dot_value, | |
f6973bdc | 1072 | uint64_t*, |
77e65537 ILT |
1073 | Output_section** dot_section, |
1074 | std::string*, | |
1075 | Input_section_list*) | |
1076 | { | |
1077 | gold_assert(os != NULL); | |
20e6d0d6 DK |
1078 | Output_data_expression* expression = |
1079 | new Output_data_expression(this->size_, this->is_signed_, this->val_, | |
1080 | symtab, layout, *dot_value, *dot_section); | |
1081 | os->add_output_section_data(expression); | |
1082 | layout->new_output_section_data_from_script(expression); | |
77e65537 | 1083 | *dot_value += this->size_; |
a445fddf ILT |
1084 | } |
1085 | ||
494e05f4 ILT |
1086 | // Print for debugging. |
1087 | ||
1088 | void | |
1089 | Output_section_element_data::print(FILE* f) const | |
1090 | { | |
1091 | const char* s; | |
1092 | switch (this->size_) | |
1093 | { | |
1094 | case 1: | |
1095 | s = "BYTE"; | |
1096 | break; | |
1097 | case 2: | |
1098 | s = "SHORT"; | |
1099 | break; | |
1100 | case 4: | |
1101 | s = "LONG"; | |
1102 | break; | |
1103 | case 8: | |
1104 | if (this->is_signed_) | |
1105 | s = "SQUAD"; | |
1106 | else | |
1107 | s = "QUAD"; | |
1108 | break; | |
1109 | default: | |
1110 | gold_unreachable(); | |
1111 | } | |
1112 | fprintf(f, " %s(", s); | |
1113 | this->val_->print(f); | |
1114 | fprintf(f, ")\n"); | |
1115 | } | |
1116 | ||
1117 | // A fill value setting in an output section. | |
1118 | ||
1119 | class Output_section_element_fill : public Output_section_element | |
1120 | { | |
1121 | public: | |
1122 | Output_section_element_fill(Expression* val) | |
1123 | : val_(val) | |
1124 | { } | |
1125 | ||
a445fddf ILT |
1126 | // Update the fill value while setting section addresses. |
1127 | void | |
1128 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 1129 | uint64_t, uint64_t* dot_value, uint64_t*, |
77e65537 ILT |
1130 | Output_section** dot_section, |
1131 | std::string* fill, Input_section_list*) | |
a445fddf | 1132 | { |
77e65537 | 1133 | Output_section* fill_section; |
919ed24c | 1134 | uint64_t fill_val = this->val_->eval_with_dot(symtab, layout, false, |
77e65537 | 1135 | *dot_value, *dot_section, |
f6973bdc | 1136 | &fill_section, NULL); |
77e65537 ILT |
1137 | if (fill_section != NULL) |
1138 | gold_warning(_("fill value is not absolute")); | |
a445fddf ILT |
1139 | // FIXME: The GNU linker supports fill values of arbitrary length. |
1140 | unsigned char fill_buff[4]; | |
1141 | elfcpp::Swap_unaligned<32, true>::writeval(fill_buff, fill_val); | |
1142 | fill->assign(reinterpret_cast<char*>(fill_buff), 4); | |
1143 | } | |
1144 | ||
1145 | // Print for debugging. | |
494e05f4 ILT |
1146 | void |
1147 | print(FILE* f) const | |
1148 | { | |
1149 | fprintf(f, " FILL("); | |
1150 | this->val_->print(f); | |
1151 | fprintf(f, ")\n"); | |
1152 | } | |
1153 | ||
1154 | private: | |
1155 | // The new fill value. | |
1156 | Expression* val_; | |
1157 | }; | |
1158 | ||
1159 | // An input section specification in an output section | |
1160 | ||
1161 | class Output_section_element_input : public Output_section_element | |
1162 | { | |
1163 | public: | |
494e05f4 ILT |
1164 | Output_section_element_input(const Input_section_spec* spec, bool keep); |
1165 | ||
a445fddf ILT |
1166 | // Finalize symbols--just update the value of the dot symbol. |
1167 | void | |
77e65537 ILT |
1168 | finalize_symbols(Symbol_table*, const Layout*, uint64_t* dot_value, |
1169 | Output_section** dot_section) | |
a445fddf ILT |
1170 | { |
1171 | *dot_value = this->final_dot_value_; | |
77e65537 | 1172 | *dot_section = this->final_dot_section_; |
a445fddf ILT |
1173 | } |
1174 | ||
1175 | // See whether we match FILE_NAME and SECTION_NAME as an input | |
1176 | // section. | |
1177 | bool | |
1178 | match_name(const char* file_name, const char* section_name) const; | |
1179 | ||
1180 | // Set the section address. | |
1181 | void | |
1182 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 1183 | uint64_t subalign, uint64_t* dot_value, uint64_t*, |
77e65537 ILT |
1184 | Output_section**, std::string* fill, |
1185 | Input_section_list*); | |
a445fddf ILT |
1186 | |
1187 | // Print for debugging. | |
494e05f4 ILT |
1188 | void |
1189 | print(FILE* f) const; | |
1190 | ||
1191 | private: | |
1192 | // An input section pattern. | |
1193 | struct Input_section_pattern | |
1194 | { | |
1195 | std::string pattern; | |
a445fddf | 1196 | bool pattern_is_wildcard; |
494e05f4 ILT |
1197 | Sort_wildcard sort; |
1198 | ||
1199 | Input_section_pattern(const char* patterna, size_t patternlena, | |
1200 | Sort_wildcard sorta) | |
a445fddf | 1201 | : pattern(patterna, patternlena), |
6e9ba2ca | 1202 | pattern_is_wildcard(is_wildcard_string(this->pattern.c_str())), |
a445fddf | 1203 | sort(sorta) |
494e05f4 ILT |
1204 | { } |
1205 | }; | |
1206 | ||
1207 | typedef std::vector<Input_section_pattern> Input_section_patterns; | |
1208 | ||
a445fddf ILT |
1209 | // Filename_exclusions is a pair of filename pattern and a bool |
1210 | // indicating whether the filename is a wildcard. | |
1211 | typedef std::vector<std::pair<std::string, bool> > Filename_exclusions; | |
1212 | ||
1213 | // Return whether STRING matches PATTERN, where IS_WILDCARD_PATTERN | |
1214 | // indicates whether this is a wildcard pattern. | |
1215 | static inline bool | |
1216 | match(const char* string, const char* pattern, bool is_wildcard_pattern) | |
1217 | { | |
1218 | return (is_wildcard_pattern | |
1219 | ? fnmatch(pattern, string, 0) == 0 | |
1220 | : strcmp(string, pattern) == 0); | |
1221 | } | |
494e05f4 | 1222 | |
a445fddf ILT |
1223 | // See if we match a file name. |
1224 | bool | |
1225 | match_file_name(const char* file_name) const; | |
1226 | ||
1227 | // The file name pattern. If this is the empty string, we match all | |
1228 | // files. | |
494e05f4 | 1229 | std::string filename_pattern_; |
a445fddf ILT |
1230 | // Whether the file name pattern is a wildcard. |
1231 | bool filename_is_wildcard_; | |
494e05f4 ILT |
1232 | // How the file names should be sorted. This may only be |
1233 | // SORT_WILDCARD_NONE or SORT_WILDCARD_BY_NAME. | |
1234 | Sort_wildcard filename_sort_; | |
1235 | // The list of file names to exclude. | |
1236 | Filename_exclusions filename_exclusions_; | |
1237 | // The list of input section patterns. | |
1238 | Input_section_patterns input_section_patterns_; | |
1239 | // Whether to keep this section when garbage collecting. | |
1240 | bool keep_; | |
a445fddf ILT |
1241 | // The value of dot after including all matching sections. |
1242 | uint64_t final_dot_value_; | |
77e65537 ILT |
1243 | // The section where dot is defined after including all matching |
1244 | // sections. | |
1245 | Output_section* final_dot_section_; | |
494e05f4 ILT |
1246 | }; |
1247 | ||
1248 | // Construct Output_section_element_input. The parser records strings | |
1249 | // as pointers into a copy of the script file, which will go away when | |
1250 | // parsing is complete. We make sure they are in std::string objects. | |
1251 | ||
1252 | Output_section_element_input::Output_section_element_input( | |
1253 | const Input_section_spec* spec, | |
1254 | bool keep) | |
a445fddf ILT |
1255 | : filename_pattern_(), |
1256 | filename_is_wildcard_(false), | |
494e05f4 ILT |
1257 | filename_sort_(spec->file.sort), |
1258 | filename_exclusions_(), | |
1259 | input_section_patterns_(), | |
a445fddf | 1260 | keep_(keep), |
77e65537 ILT |
1261 | final_dot_value_(0), |
1262 | final_dot_section_(NULL) | |
494e05f4 | 1263 | { |
a445fddf ILT |
1264 | // The filename pattern "*" is common, and matches all files. Turn |
1265 | // it into the empty string. | |
1266 | if (spec->file.name.length != 1 || spec->file.name.value[0] != '*') | |
1267 | this->filename_pattern_.assign(spec->file.name.value, | |
1268 | spec->file.name.length); | |
6e9ba2ca | 1269 | this->filename_is_wildcard_ = is_wildcard_string(this->filename_pattern_.c_str()); |
a445fddf | 1270 | |
494e05f4 ILT |
1271 | if (spec->input_sections.exclude != NULL) |
1272 | { | |
1273 | for (String_list::const_iterator p = | |
1274 | spec->input_sections.exclude->begin(); | |
1275 | p != spec->input_sections.exclude->end(); | |
1276 | ++p) | |
a445fddf | 1277 | { |
6e9ba2ca | 1278 | bool is_wildcard = is_wildcard_string((*p).c_str()); |
a445fddf ILT |
1279 | this->filename_exclusions_.push_back(std::make_pair(*p, |
1280 | is_wildcard)); | |
1281 | } | |
494e05f4 ILT |
1282 | } |
1283 | ||
1284 | if (spec->input_sections.sections != NULL) | |
1285 | { | |
1286 | Input_section_patterns& isp(this->input_section_patterns_); | |
1287 | for (String_sort_list::const_iterator p = | |
1288 | spec->input_sections.sections->begin(); | |
1289 | p != spec->input_sections.sections->end(); | |
1290 | ++p) | |
1291 | isp.push_back(Input_section_pattern(p->name.value, p->name.length, | |
1292 | p->sort)); | |
1293 | } | |
1294 | } | |
1295 | ||
a445fddf ILT |
1296 | // See whether we match FILE_NAME. |
1297 | ||
1298 | bool | |
1299 | Output_section_element_input::match_file_name(const char* file_name) const | |
1300 | { | |
1301 | if (!this->filename_pattern_.empty()) | |
1302 | { | |
1303 | // If we were called with no filename, we refuse to match a | |
1304 | // pattern which requires a file name. | |
1305 | if (file_name == NULL) | |
1306 | return false; | |
1307 | ||
1308 | if (!match(file_name, this->filename_pattern_.c_str(), | |
1309 | this->filename_is_wildcard_)) | |
1310 | return false; | |
1311 | } | |
1312 | ||
1313 | if (file_name != NULL) | |
1314 | { | |
1315 | // Now we have to see whether FILE_NAME matches one of the | |
1316 | // exclusion patterns, if any. | |
1317 | for (Filename_exclusions::const_iterator p = | |
1318 | this->filename_exclusions_.begin(); | |
1319 | p != this->filename_exclusions_.end(); | |
1320 | ++p) | |
1321 | { | |
1322 | if (match(file_name, p->first.c_str(), p->second)) | |
1323 | return false; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | return true; | |
1328 | } | |
1329 | ||
1330 | // See whether we match FILE_NAME and SECTION_NAME. | |
1331 | ||
1332 | bool | |
1333 | Output_section_element_input::match_name(const char* file_name, | |
1334 | const char* section_name) const | |
1335 | { | |
1336 | if (!this->match_file_name(file_name)) | |
1337 | return false; | |
1338 | ||
1339 | // If there are no section name patterns, then we match. | |
1340 | if (this->input_section_patterns_.empty()) | |
1341 | return true; | |
1342 | ||
1343 | // See whether we match the section name patterns. | |
1344 | for (Input_section_patterns::const_iterator p = | |
1345 | this->input_section_patterns_.begin(); | |
1346 | p != this->input_section_patterns_.end(); | |
1347 | ++p) | |
1348 | { | |
1349 | if (match(section_name, p->pattern.c_str(), p->pattern_is_wildcard)) | |
1350 | return true; | |
1351 | } | |
1352 | ||
1353 | // We didn't match any section names, so we didn't match. | |
1354 | return false; | |
1355 | } | |
1356 | ||
1357 | // Information we use to sort the input sections. | |
1358 | ||
20e6d0d6 | 1359 | class Input_section_info |
a445fddf | 1360 | { |
20e6d0d6 | 1361 | public: |
6625d24e | 1362 | Input_section_info(const Output_section::Input_section& input_section) |
2ea97941 | 1363 | : input_section_(input_section), section_name_(), |
20e6d0d6 DK |
1364 | size_(0), addralign_(1) |
1365 | { } | |
1366 | ||
1367 | // Return the simple input section. | |
6625d24e | 1368 | const Output_section::Input_section& |
20e6d0d6 DK |
1369 | input_section() const |
1370 | { return this->input_section_; } | |
1371 | ||
1372 | // Return the object. | |
1373 | Relobj* | |
1374 | relobj() const | |
1375 | { return this->input_section_.relobj(); } | |
1376 | ||
1377 | // Return the section index. | |
1378 | unsigned int | |
1379 | shndx() | |
1380 | { return this->input_section_.shndx(); } | |
1381 | ||
1382 | // Return the section name. | |
1383 | const std::string& | |
1384 | section_name() const | |
1385 | { return this->section_name_; } | |
1386 | ||
1387 | // Set the section name. | |
1388 | void | |
2ea97941 ILT |
1389 | set_section_name(const std::string name) |
1390 | { this->section_name_ = name; } | |
20e6d0d6 DK |
1391 | |
1392 | // Return the section size. | |
1393 | uint64_t | |
1394 | size() const | |
1395 | { return this->size_; } | |
1396 | ||
1397 | // Set the section size. | |
1398 | void | |
2ea97941 ILT |
1399 | set_size(uint64_t size) |
1400 | { this->size_ = size; } | |
20e6d0d6 DK |
1401 | |
1402 | // Return the address alignment. | |
1403 | uint64_t | |
1404 | addralign() const | |
1405 | { return this->addralign_; } | |
1406 | ||
1407 | // Set the address alignment. | |
1408 | void | |
2ea97941 ILT |
1409 | set_addralign(uint64_t addralign) |
1410 | { this->addralign_ = addralign; } | |
20e6d0d6 DK |
1411 | |
1412 | private: | |
1413 | // Input section, can be a relaxed section. | |
6625d24e | 1414 | Output_section::Input_section input_section_; |
20e6d0d6 DK |
1415 | // Name of the section. |
1416 | std::string section_name_; | |
1417 | // Section size. | |
1418 | uint64_t size_; | |
1419 | // Address alignment. | |
1420 | uint64_t addralign_; | |
a445fddf ILT |
1421 | }; |
1422 | ||
1423 | // A class to sort the input sections. | |
1424 | ||
1425 | class Input_section_sorter | |
1426 | { | |
1427 | public: | |
1428 | Input_section_sorter(Sort_wildcard filename_sort, Sort_wildcard section_sort) | |
1429 | : filename_sort_(filename_sort), section_sort_(section_sort) | |
1430 | { } | |
1431 | ||
1432 | bool | |
1433 | operator()(const Input_section_info&, const Input_section_info&) const; | |
1434 | ||
1435 | private: | |
1436 | Sort_wildcard filename_sort_; | |
1437 | Sort_wildcard section_sort_; | |
1438 | }; | |
1439 | ||
1440 | bool | |
1441 | Input_section_sorter::operator()(const Input_section_info& isi1, | |
1442 | const Input_section_info& isi2) const | |
1443 | { | |
1444 | if (this->section_sort_ == SORT_WILDCARD_BY_NAME | |
1445 | || this->section_sort_ == SORT_WILDCARD_BY_NAME_BY_ALIGNMENT | |
1446 | || (this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT_BY_NAME | |
20e6d0d6 | 1447 | && isi1.addralign() == isi2.addralign())) |
a445fddf | 1448 | { |
20e6d0d6 DK |
1449 | if (isi1.section_name() != isi2.section_name()) |
1450 | return isi1.section_name() < isi2.section_name(); | |
a445fddf ILT |
1451 | } |
1452 | if (this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT | |
1453 | || this->section_sort_ == SORT_WILDCARD_BY_NAME_BY_ALIGNMENT | |
1454 | || this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT_BY_NAME) | |
1455 | { | |
20e6d0d6 DK |
1456 | if (isi1.addralign() != isi2.addralign()) |
1457 | return isi1.addralign() < isi2.addralign(); | |
a445fddf ILT |
1458 | } |
1459 | if (this->filename_sort_ == SORT_WILDCARD_BY_NAME) | |
1460 | { | |
20e6d0d6 DK |
1461 | if (isi1.relobj()->name() != isi2.relobj()->name()) |
1462 | return (isi1.relobj()->name() < isi2.relobj()->name()); | |
a445fddf ILT |
1463 | } |
1464 | ||
1465 | // Otherwise we leave them in the same order. | |
1466 | return false; | |
1467 | } | |
1468 | ||
1469 | // Set the section address. Look in INPUT_SECTIONS for sections which | |
1470 | // match this spec, sort them as specified, and add them to the output | |
1471 | // section. | |
1472 | ||
1473 | void | |
1474 | Output_section_element_input::set_section_addresses( | |
1475 | Symbol_table*, | |
20e6d0d6 | 1476 | Layout* layout, |
a445fddf ILT |
1477 | Output_section* output_section, |
1478 | uint64_t subalign, | |
1479 | uint64_t* dot_value, | |
f6973bdc | 1480 | uint64_t*, |
77e65537 | 1481 | Output_section** dot_section, |
a445fddf ILT |
1482 | std::string* fill, |
1483 | Input_section_list* input_sections) | |
1484 | { | |
1485 | // We build a list of sections which match each | |
1486 | // Input_section_pattern. | |
1487 | ||
1488 | typedef std::vector<std::vector<Input_section_info> > Matching_sections; | |
1489 | size_t input_pattern_count = this->input_section_patterns_.size(); | |
1490 | if (input_pattern_count == 0) | |
1491 | input_pattern_count = 1; | |
1492 | Matching_sections matching_sections(input_pattern_count); | |
1493 | ||
1494 | // Look through the list of sections for this output section. Add | |
1495 | // each one which matches to one of the elements of | |
1496 | // MATCHING_SECTIONS. | |
1497 | ||
1498 | Input_section_list::iterator p = input_sections->begin(); | |
1499 | while (p != input_sections->end()) | |
1500 | { | |
20e6d0d6 DK |
1501 | Relobj* relobj = p->relobj(); |
1502 | unsigned int shndx = p->shndx(); | |
1503 | Input_section_info isi(*p); | |
1504 | ||
a445fddf ILT |
1505 | // Calling section_name and section_addralign is not very |
1506 | // efficient. | |
a445fddf ILT |
1507 | |
1508 | // Lock the object so that we can get information about the | |
1509 | // section. This is OK since we know we are single-threaded | |
1510 | // here. | |
1511 | { | |
1512 | const Task* task = reinterpret_cast<const Task*>(-1); | |
20e6d0d6 DK |
1513 | Task_lock_obj<Object> tl(task, relobj); |
1514 | ||
1515 | isi.set_section_name(relobj->section_name(shndx)); | |
1516 | if (p->is_relaxed_input_section()) | |
c0a62865 DK |
1517 | { |
1518 | // We use current data size because relxed section sizes may not | |
1519 | // have finalized yet. | |
1520 | isi.set_size(p->relaxed_input_section()->current_data_size()); | |
1521 | isi.set_addralign(p->relaxed_input_section()->addralign()); | |
1522 | } | |
20e6d0d6 | 1523 | else |
c0a62865 DK |
1524 | { |
1525 | isi.set_size(relobj->section_size(shndx)); | |
1526 | isi.set_addralign(relobj->section_addralign(shndx)); | |
1527 | } | |
a445fddf ILT |
1528 | } |
1529 | ||
20e6d0d6 | 1530 | if (!this->match_file_name(relobj->name().c_str())) |
a445fddf ILT |
1531 | ++p; |
1532 | else if (this->input_section_patterns_.empty()) | |
1533 | { | |
1534 | matching_sections[0].push_back(isi); | |
1535 | p = input_sections->erase(p); | |
1536 | } | |
1537 | else | |
1538 | { | |
1539 | size_t i; | |
1540 | for (i = 0; i < input_pattern_count; ++i) | |
1541 | { | |
1542 | const Input_section_pattern& | |
1543 | isp(this->input_section_patterns_[i]); | |
20e6d0d6 | 1544 | if (match(isi.section_name().c_str(), isp.pattern.c_str(), |
a445fddf ILT |
1545 | isp.pattern_is_wildcard)) |
1546 | break; | |
1547 | } | |
1548 | ||
1549 | if (i >= this->input_section_patterns_.size()) | |
1550 | ++p; | |
1551 | else | |
1552 | { | |
1553 | matching_sections[i].push_back(isi); | |
1554 | p = input_sections->erase(p); | |
1555 | } | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | // Look through MATCHING_SECTIONS. Sort each one as specified, | |
1560 | // using a stable sort so that we get the default order when | |
1561 | // sections are otherwise equal. Add each input section to the | |
1562 | // output section. | |
1563 | ||
661be1e2 | 1564 | uint64_t dot = *dot_value; |
a445fddf ILT |
1565 | for (size_t i = 0; i < input_pattern_count; ++i) |
1566 | { | |
1567 | if (matching_sections[i].empty()) | |
1568 | continue; | |
1569 | ||
1570 | gold_assert(output_section != NULL); | |
1571 | ||
1572 | const Input_section_pattern& isp(this->input_section_patterns_[i]); | |
1573 | if (isp.sort != SORT_WILDCARD_NONE | |
1574 | || this->filename_sort_ != SORT_WILDCARD_NONE) | |
1575 | std::stable_sort(matching_sections[i].begin(), | |
1576 | matching_sections[i].end(), | |
1577 | Input_section_sorter(this->filename_sort_, | |
1578 | isp.sort)); | |
1579 | ||
2ea97941 | 1580 | for (std::vector<Input_section_info>::const_iterator p = |
a445fddf | 1581 | matching_sections[i].begin(); |
2ea97941 ILT |
1582 | p != matching_sections[i].end(); |
1583 | ++p) | |
a445fddf | 1584 | { |
6625d24e DK |
1585 | // Override the original address alignment if SUBALIGN is specified |
1586 | // and is greater than the original alignment. We need to make a | |
1587 | // copy of the input section to modify the alignment. | |
1588 | Output_section::Input_section sis(p->input_section()); | |
1589 | ||
1590 | uint64_t this_subalign = sis.addralign(); | |
1591 | if (!sis.is_input_section()) | |
1592 | sis.output_section_data()->finalize_data_size(); | |
1593 | uint64_t data_size = sis.data_size(); | |
a445fddf | 1594 | if (this_subalign < subalign) |
6625d24e DK |
1595 | { |
1596 | this_subalign = subalign; | |
1597 | sis.set_addralign(subalign); | |
1598 | } | |
a445fddf | 1599 | |
661be1e2 | 1600 | uint64_t address = align_address(dot, this_subalign); |
a445fddf | 1601 | |
661be1e2 | 1602 | if (address > dot && !fill->empty()) |
a445fddf ILT |
1603 | { |
1604 | section_size_type length = | |
661be1e2 | 1605 | convert_to_section_size_type(address - dot); |
a445fddf ILT |
1606 | std::string this_fill = this->get_fill_string(fill, length); |
1607 | Output_section_data* posd = new Output_data_const(this_fill, 0); | |
1608 | output_section->add_output_section_data(posd); | |
20e6d0d6 | 1609 | layout->new_output_section_data_from_script(posd); |
a445fddf ILT |
1610 | } |
1611 | ||
6625d24e DK |
1612 | output_section->add_script_input_section(sis); |
1613 | dot = address + data_size; | |
a445fddf ILT |
1614 | } |
1615 | } | |
1616 | ||
661be1e2 ILT |
1617 | // An SHF_TLS/SHT_NOBITS section does not take up any |
1618 | // address space. | |
1619 | if (output_section == NULL | |
1620 | || (output_section->flags() & elfcpp::SHF_TLS) == 0 | |
1621 | || output_section->type() != elfcpp::SHT_NOBITS) | |
1622 | *dot_value = dot; | |
1623 | ||
a445fddf | 1624 | this->final_dot_value_ = *dot_value; |
77e65537 | 1625 | this->final_dot_section_ = *dot_section; |
a445fddf ILT |
1626 | } |
1627 | ||
494e05f4 ILT |
1628 | // Print for debugging. |
1629 | ||
1630 | void | |
1631 | Output_section_element_input::print(FILE* f) const | |
1632 | { | |
1633 | fprintf(f, " "); | |
1634 | ||
1635 | if (this->keep_) | |
1636 | fprintf(f, "KEEP("); | |
1637 | ||
1638 | if (!this->filename_pattern_.empty()) | |
1639 | { | |
1640 | bool need_close_paren = false; | |
1641 | switch (this->filename_sort_) | |
1642 | { | |
1643 | case SORT_WILDCARD_NONE: | |
1644 | break; | |
1645 | case SORT_WILDCARD_BY_NAME: | |
1646 | fprintf(f, "SORT_BY_NAME("); | |
1647 | need_close_paren = true; | |
1648 | break; | |
1649 | default: | |
1650 | gold_unreachable(); | |
1651 | } | |
1652 | ||
1653 | fprintf(f, "%s", this->filename_pattern_.c_str()); | |
1654 | ||
1655 | if (need_close_paren) | |
1656 | fprintf(f, ")"); | |
1657 | } | |
1658 | ||
1659 | if (!this->input_section_patterns_.empty() | |
1660 | || !this->filename_exclusions_.empty()) | |
1661 | { | |
1662 | fprintf(f, "("); | |
1663 | ||
1664 | bool need_space = false; | |
1665 | if (!this->filename_exclusions_.empty()) | |
1666 | { | |
1667 | fprintf(f, "EXCLUDE_FILE("); | |
1668 | bool need_comma = false; | |
1669 | for (Filename_exclusions::const_iterator p = | |
1670 | this->filename_exclusions_.begin(); | |
1671 | p != this->filename_exclusions_.end(); | |
1672 | ++p) | |
1673 | { | |
1674 | if (need_comma) | |
1675 | fprintf(f, ", "); | |
a445fddf | 1676 | fprintf(f, "%s", p->first.c_str()); |
494e05f4 ILT |
1677 | need_comma = true; |
1678 | } | |
1679 | fprintf(f, ")"); | |
1680 | need_space = true; | |
1681 | } | |
1682 | ||
1683 | for (Input_section_patterns::const_iterator p = | |
1684 | this->input_section_patterns_.begin(); | |
1685 | p != this->input_section_patterns_.end(); | |
1686 | ++p) | |
1687 | { | |
1688 | if (need_space) | |
1689 | fprintf(f, " "); | |
1690 | ||
1691 | int close_parens = 0; | |
1692 | switch (p->sort) | |
1693 | { | |
1694 | case SORT_WILDCARD_NONE: | |
1695 | break; | |
1696 | case SORT_WILDCARD_BY_NAME: | |
1697 | fprintf(f, "SORT_BY_NAME("); | |
1698 | close_parens = 1; | |
1699 | break; | |
1700 | case SORT_WILDCARD_BY_ALIGNMENT: | |
1701 | fprintf(f, "SORT_BY_ALIGNMENT("); | |
1702 | close_parens = 1; | |
1703 | break; | |
1704 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
1705 | fprintf(f, "SORT_BY_NAME(SORT_BY_ALIGNMENT("); | |
1706 | close_parens = 2; | |
1707 | break; | |
1708 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
1709 | fprintf(f, "SORT_BY_ALIGNMENT(SORT_BY_NAME("); | |
1710 | close_parens = 2; | |
1711 | break; | |
1712 | default: | |
1713 | gold_unreachable(); | |
1714 | } | |
1715 | ||
1716 | fprintf(f, "%s", p->pattern.c_str()); | |
1717 | ||
1718 | for (int i = 0; i < close_parens; ++i) | |
1719 | fprintf(f, ")"); | |
1720 | ||
1721 | need_space = true; | |
1722 | } | |
1723 | ||
1724 | fprintf(f, ")"); | |
1725 | } | |
1726 | ||
1727 | if (this->keep_) | |
1728 | fprintf(f, ")"); | |
1729 | ||
1730 | fprintf(f, "\n"); | |
1731 | } | |
1732 | ||
1733 | // An output section. | |
1734 | ||
1735 | class Output_section_definition : public Sections_element | |
1736 | { | |
1737 | public: | |
a445fddf ILT |
1738 | typedef Output_section_element::Input_section_list Input_section_list; |
1739 | ||
494e05f4 ILT |
1740 | Output_section_definition(const char* name, size_t namelen, |
1741 | const Parser_output_section_header* header); | |
1742 | ||
1743 | // Finish the output section with the information in the trailer. | |
1744 | void | |
1745 | finish(const Parser_output_section_trailer* trailer); | |
1746 | ||
1747 | // Add a symbol to be defined. | |
1748 | void | |
1749 | add_symbol_assignment(const char* name, size_t length, Expression* value, | |
1750 | bool provide, bool hidden); | |
a445fddf ILT |
1751 | |
1752 | // Add an assignment to the special dot symbol. | |
1753 | void | |
1754 | add_dot_assignment(Expression* value); | |
1755 | ||
494e05f4 ILT |
1756 | // Add an assertion. |
1757 | void | |
1758 | add_assertion(Expression* check, const char* message, size_t messagelen); | |
1759 | ||
1760 | // Add a data item to the current output section. | |
1761 | void | |
1762 | add_data(int size, bool is_signed, Expression* val); | |
1763 | ||
1764 | // Add a setting for the fill value. | |
1765 | void | |
1766 | add_fill(Expression* val); | |
1767 | ||
1768 | // Add an input section specification. | |
1769 | void | |
1770 | add_input_section(const Input_section_spec* spec, bool keep); | |
1771 | ||
0d371ad3 ILT |
1772 | // Return whether the output section is relro. |
1773 | bool | |
1774 | is_relro() const | |
1775 | { return this->is_relro_; } | |
1776 | ||
2d924fd9 ILT |
1777 | // Record that the output section is relro. |
1778 | void | |
1779 | set_is_relro() | |
1780 | { this->is_relro_ = true; } | |
1781 | ||
919ed24c ILT |
1782 | // Create any required output sections. |
1783 | void | |
1784 | create_sections(Layout*); | |
1785 | ||
a445fddf ILT |
1786 | // Add any symbols being defined to the symbol table. |
1787 | void | |
1788 | add_symbols_to_table(Symbol_table* symtab); | |
1789 | ||
1790 | // Finalize symbols and check assertions. | |
1791 | void | |
77e65537 | 1792 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*); |
a445fddf ILT |
1793 | |
1794 | // Return the output section name to use for an input file name and | |
1795 | // section name. | |
1796 | const char* | |
1797 | output_section_name(const char* file_name, const char* section_name, | |
1e5d2fb1 | 1798 | Output_section***, Script_sections::Section_type*); |
a445fddf | 1799 | |
0d371ad3 ILT |
1800 | // Initialize OSP with an output section. |
1801 | void | |
1802 | orphan_section_init(Orphan_section_placement* osp, | |
1803 | Script_sections::Elements_iterator p) | |
1804 | { osp->output_section_init(this->name_, this->output_section_, p); } | |
a445fddf ILT |
1805 | |
1806 | // Set the section address. | |
1807 | void | |
1808 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc ILT |
1809 | uint64_t* dot_value, uint64_t*, |
1810 | uint64_t* load_address); | |
a445fddf | 1811 | |
3802b2dd ILT |
1812 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
1813 | // this section is constrained, and the input sections do not match, | |
1814 | // return the constraint, and set *POSD. | |
1815 | Section_constraint | |
1816 | check_constraint(Output_section_definition** posd); | |
1817 | ||
1818 | // See if this is the alternate output section for a constrained | |
1819 | // output section. If it is, transfer the Output_section and return | |
1820 | // true. Otherwise return false. | |
1821 | bool | |
1822 | alternate_constraint(Output_section_definition*, Section_constraint); | |
1823 | ||
1c4f3631 | 1824 | // Get the list of segments to use for an allocated section when |
2cefc357 | 1825 | // using a PHDRS clause. |
1c4f3631 | 1826 | Output_section* |
2cefc357 | 1827 | allocate_to_segment(String_list** phdrs_list, bool* orphan); |
1c4f3631 | 1828 | |
8f2eb564 ILT |
1829 | // Look for an output section by name and return the address, the |
1830 | // load address, the alignment, and the size. This is used when an | |
1831 | // expression refers to an output section which was not actually | |
1832 | // created. This returns true if the section was found, false | |
1833 | // otherwise. | |
1834 | bool | |
1835 | get_output_section_info(const char*, uint64_t*, uint64_t*, uint64_t*, | |
1836 | uint64_t*) const; | |
1837 | ||
2d924fd9 ILT |
1838 | // Return the associated Output_section if there is one. |
1839 | Output_section* | |
1840 | get_output_section() const | |
1841 | { return this->output_section_; } | |
1842 | ||
494e05f4 ILT |
1843 | // Print the contents to the FILE. This is for debugging. |
1844 | void | |
1845 | print(FILE*) const; | |
1846 | ||
1e5d2fb1 DK |
1847 | // Return the output section type if specified or Script_sections::ST_NONE. |
1848 | Script_sections::Section_type | |
1849 | section_type() const; | |
1850 | ||
7f8cd844 NC |
1851 | // Store the memory region to use. |
1852 | void | |
1853 | set_memory_region(Memory_region*, bool set_vma); | |
1854 | ||
1855 | void | |
1856 | set_section_vma(Expression* address) | |
1857 | { this->address_ = address; } | |
1858 | ||
1859 | void | |
1860 | set_section_lma(Expression* address) | |
1861 | { this->load_address_ = address; } | |
1862 | ||
1863 | std::string | |
1864 | get_section_name(void) const | |
1865 | { return this->name_; } | |
1866 | ||
494e05f4 | 1867 | private: |
1e5d2fb1 DK |
1868 | static const char* |
1869 | script_section_type_name(Script_section_type); | |
1870 | ||
494e05f4 ILT |
1871 | typedef std::vector<Output_section_element*> Output_section_elements; |
1872 | ||
1873 | // The output section name. | |
1874 | std::string name_; | |
1875 | // The address. This may be NULL. | |
1876 | Expression* address_; | |
1877 | // The load address. This may be NULL. | |
1878 | Expression* load_address_; | |
1879 | // The alignment. This may be NULL. | |
1880 | Expression* align_; | |
1881 | // The input section alignment. This may be NULL. | |
1882 | Expression* subalign_; | |
3802b2dd ILT |
1883 | // The constraint, if any. |
1884 | Section_constraint constraint_; | |
494e05f4 ILT |
1885 | // The fill value. This may be NULL. |
1886 | Expression* fill_; | |
1c4f3631 ILT |
1887 | // The list of segments this section should go into. This may be |
1888 | // NULL. | |
1889 | String_list* phdrs_; | |
494e05f4 ILT |
1890 | // The list of elements defining the section. |
1891 | Output_section_elements elements_; | |
a445fddf ILT |
1892 | // The Output_section created for this definition. This will be |
1893 | // NULL if none was created. | |
1894 | Output_section* output_section_; | |
8f2eb564 ILT |
1895 | // The address after it has been evaluated. |
1896 | uint64_t evaluated_address_; | |
1897 | // The load address after it has been evaluated. | |
1898 | uint64_t evaluated_load_address_; | |
1899 | // The alignment after it has been evaluated. | |
1900 | uint64_t evaluated_addralign_; | |
2d924fd9 ILT |
1901 | // The output section is relro. |
1902 | bool is_relro_; | |
1e5d2fb1 DK |
1903 | // The output section type if specified. |
1904 | enum Script_section_type script_section_type_; | |
494e05f4 ILT |
1905 | }; |
1906 | ||
1907 | // Constructor. | |
1908 | ||
1909 | Output_section_definition::Output_section_definition( | |
1910 | const char* name, | |
1911 | size_t namelen, | |
1912 | const Parser_output_section_header* header) | |
1913 | : name_(name, namelen), | |
1914 | address_(header->address), | |
1915 | load_address_(header->load_address), | |
1916 | align_(header->align), | |
1917 | subalign_(header->subalign), | |
3802b2dd | 1918 | constraint_(header->constraint), |
494e05f4 | 1919 | fill_(NULL), |
1c4f3631 | 1920 | phdrs_(NULL), |
a445fddf | 1921 | elements_(), |
2d924fd9 ILT |
1922 | output_section_(NULL), |
1923 | evaluated_address_(0), | |
1924 | evaluated_load_address_(0), | |
1925 | evaluated_addralign_(0), | |
1e5d2fb1 DK |
1926 | is_relro_(false), |
1927 | script_section_type_(header->section_type) | |
494e05f4 ILT |
1928 | { |
1929 | } | |
1930 | ||
1931 | // Finish an output section. | |
1932 | ||
1933 | void | |
1934 | Output_section_definition::finish(const Parser_output_section_trailer* trailer) | |
1935 | { | |
1936 | this->fill_ = trailer->fill; | |
1c4f3631 | 1937 | this->phdrs_ = trailer->phdrs; |
494e05f4 ILT |
1938 | } |
1939 | ||
1940 | // Add a symbol to be defined. | |
1941 | ||
1942 | void | |
1943 | Output_section_definition::add_symbol_assignment(const char* name, | |
1944 | size_t length, | |
1945 | Expression* value, | |
1946 | bool provide, | |
1947 | bool hidden) | |
1948 | { | |
1949 | Output_section_element* p = new Output_section_element_assignment(name, | |
1950 | length, | |
1951 | value, | |
1952 | provide, | |
1953 | hidden); | |
1954 | this->elements_.push_back(p); | |
1955 | } | |
1956 | ||
a445fddf | 1957 | // Add an assignment to the special dot symbol. |
494e05f4 ILT |
1958 | |
1959 | void | |
a445fddf ILT |
1960 | Output_section_definition::add_dot_assignment(Expression* value) |
1961 | { | |
1962 | Output_section_element* p = new Output_section_element_dot_assignment(value); | |
1963 | this->elements_.push_back(p); | |
1964 | } | |
1965 | ||
1966 | // Add an assertion. | |
1967 | ||
1968 | void | |
1969 | Output_section_definition::add_assertion(Expression* check, | |
1970 | const char* message, | |
494e05f4 ILT |
1971 | size_t messagelen) |
1972 | { | |
1973 | Output_section_element* p = new Output_section_element_assertion(check, | |
1974 | message, | |
1975 | messagelen); | |
1976 | this->elements_.push_back(p); | |
1977 | } | |
1978 | ||
1979 | // Add a data item to the current output section. | |
1980 | ||
1981 | void | |
1982 | Output_section_definition::add_data(int size, bool is_signed, Expression* val) | |
1983 | { | |
1984 | Output_section_element* p = new Output_section_element_data(size, is_signed, | |
1985 | val); | |
1986 | this->elements_.push_back(p); | |
1987 | } | |
1988 | ||
1989 | // Add a setting for the fill value. | |
1990 | ||
1991 | void | |
1992 | Output_section_definition::add_fill(Expression* val) | |
1993 | { | |
1994 | Output_section_element* p = new Output_section_element_fill(val); | |
1995 | this->elements_.push_back(p); | |
1996 | } | |
1997 | ||
1998 | // Add an input section specification. | |
1999 | ||
2000 | void | |
2001 | Output_section_definition::add_input_section(const Input_section_spec* spec, | |
2002 | bool keep) | |
2003 | { | |
2004 | Output_section_element* p = new Output_section_element_input(spec, keep); | |
2005 | this->elements_.push_back(p); | |
2006 | } | |
2007 | ||
919ed24c ILT |
2008 | // Create any required output sections. We need an output section if |
2009 | // there is a data statement here. | |
2010 | ||
2011 | void | |
2012 | Output_section_definition::create_sections(Layout* layout) | |
2013 | { | |
2014 | if (this->output_section_ != NULL) | |
2015 | return; | |
2016 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2017 | p != this->elements_.end(); | |
2018 | ++p) | |
2019 | { | |
2020 | if ((*p)->needs_output_section()) | |
2021 | { | |
2022 | const char* name = this->name_.c_str(); | |
1e5d2fb1 DK |
2023 | this->output_section_ = |
2024 | layout->make_output_section_for_script(name, this->section_type()); | |
919ed24c ILT |
2025 | return; |
2026 | } | |
2027 | } | |
2028 | } | |
2029 | ||
a445fddf ILT |
2030 | // Add any symbols being defined to the symbol table. |
2031 | ||
2032 | void | |
2033 | Output_section_definition::add_symbols_to_table(Symbol_table* symtab) | |
2034 | { | |
2035 | for (Output_section_elements::iterator p = this->elements_.begin(); | |
2036 | p != this->elements_.end(); | |
2037 | ++p) | |
2038 | (*p)->add_symbols_to_table(symtab); | |
2039 | } | |
2040 | ||
2041 | // Finalize symbols and check assertions. | |
2042 | ||
2043 | void | |
2044 | Output_section_definition::finalize_symbols(Symbol_table* symtab, | |
2045 | const Layout* layout, | |
a445fddf ILT |
2046 | uint64_t* dot_value) |
2047 | { | |
2048 | if (this->output_section_ != NULL) | |
2049 | *dot_value = this->output_section_->address(); | |
2050 | else | |
2051 | { | |
2052 | uint64_t address = *dot_value; | |
2053 | if (this->address_ != NULL) | |
2054 | { | |
77e65537 | 2055 | Output_section* dummy; |
919ed24c | 2056 | address = this->address_->eval_with_dot(symtab, layout, true, |
77e65537 | 2057 | *dot_value, NULL, |
f6973bdc | 2058 | &dummy, NULL); |
a445fddf ILT |
2059 | } |
2060 | if (this->align_ != NULL) | |
2061 | { | |
77e65537 | 2062 | Output_section* dummy; |
919ed24c | 2063 | uint64_t align = this->align_->eval_with_dot(symtab, layout, true, |
a445fddf | 2064 | *dot_value, |
77e65537 | 2065 | NULL, |
f6973bdc | 2066 | &dummy, NULL); |
a445fddf ILT |
2067 | address = align_address(address, align); |
2068 | } | |
2069 | *dot_value = address; | |
2070 | } | |
a445fddf | 2071 | |
77e65537 | 2072 | Output_section* dot_section = this->output_section_; |
a445fddf ILT |
2073 | for (Output_section_elements::iterator p = this->elements_.begin(); |
2074 | p != this->elements_.end(); | |
2075 | ++p) | |
77e65537 | 2076 | (*p)->finalize_symbols(symtab, layout, dot_value, &dot_section); |
a445fddf ILT |
2077 | } |
2078 | ||
2079 | // Return the output section name to use for an input section name. | |
2080 | ||
2081 | const char* | |
1e5d2fb1 DK |
2082 | Output_section_definition::output_section_name( |
2083 | const char* file_name, | |
2084 | const char* section_name, | |
2085 | Output_section*** slot, | |
ca09d69a | 2086 | Script_sections::Section_type* psection_type) |
a445fddf ILT |
2087 | { |
2088 | // Ask each element whether it matches NAME. | |
2089 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2090 | p != this->elements_.end(); | |
2091 | ++p) | |
2092 | { | |
2093 | if ((*p)->match_name(file_name, section_name)) | |
2094 | { | |
2095 | // We found a match for NAME, which means that it should go | |
2096 | // into this output section. | |
2097 | *slot = &this->output_section_; | |
1e5d2fb1 | 2098 | *psection_type = this->section_type(); |
a445fddf ILT |
2099 | return this->name_.c_str(); |
2100 | } | |
2101 | } | |
2102 | ||
2103 | // We don't know about this section name. | |
2104 | return NULL; | |
2105 | } | |
2106 | ||
a445fddf ILT |
2107 | // Set the section address. Note that the OUTPUT_SECTION_ field will |
2108 | // be NULL if no input sections were mapped to this output section. | |
2109 | // We still have to adjust dot and process symbol assignments. | |
2110 | ||
2111 | void | |
2112 | Output_section_definition::set_section_addresses(Symbol_table* symtab, | |
2113 | Layout* layout, | |
fd247bfe | 2114 | uint64_t* dot_value, |
f6973bdc | 2115 | uint64_t* dot_alignment, |
fd247bfe | 2116 | uint64_t* load_address) |
a445fddf | 2117 | { |
a445fddf | 2118 | uint64_t address; |
1e5d2fb1 DK |
2119 | uint64_t old_dot_value = *dot_value; |
2120 | uint64_t old_load_address = *load_address; | |
2121 | ||
f4187277 RÁE |
2122 | // Check for --section-start. |
2123 | bool is_address_set = false; | |
2124 | if (this->output_section_ != NULL) | |
2125 | is_address_set = | |
2126 | parameters->options().section_start(this->output_section_->name(), | |
2127 | &address); | |
2128 | if (!is_address_set) | |
a445fddf | 2129 | { |
f4187277 RÁE |
2130 | if (this->address_ == NULL) |
2131 | address = *dot_value; | |
2132 | else | |
2133 | { | |
2134 | Output_section* dummy; | |
2135 | address = this->address_->eval_with_dot(symtab, layout, true, | |
2136 | *dot_value, NULL, &dummy, | |
2137 | dot_alignment); | |
2138 | } | |
a445fddf ILT |
2139 | } |
2140 | ||
2141 | uint64_t align; | |
2142 | if (this->align_ == NULL) | |
2143 | { | |
2144 | if (this->output_section_ == NULL) | |
2145 | align = 0; | |
2146 | else | |
2147 | align = this->output_section_->addralign(); | |
2148 | } | |
2149 | else | |
2150 | { | |
77e65537 | 2151 | Output_section* align_section; |
919ed24c | 2152 | align = this->align_->eval_with_dot(symtab, layout, true, *dot_value, |
f6973bdc | 2153 | NULL, &align_section, NULL); |
77e65537 ILT |
2154 | if (align_section != NULL) |
2155 | gold_warning(_("alignment of section %s is not absolute"), | |
2156 | this->name_.c_str()); | |
a445fddf ILT |
2157 | if (this->output_section_ != NULL) |
2158 | this->output_section_->set_addralign(align); | |
2159 | } | |
2160 | ||
2161 | address = align_address(address, align); | |
2162 | ||
fd247bfe ILT |
2163 | uint64_t start_address = address; |
2164 | ||
a445fddf | 2165 | *dot_value = address; |
a445fddf | 2166 | |
1e5d2fb1 DK |
2167 | // Except for NOLOAD sections, the address of non-SHF_ALLOC sections is |
2168 | // forced to zero, regardless of what the linker script wants. | |
a445fddf | 2169 | if (this->output_section_ != NULL |
1e5d2fb1 DK |
2170 | && ((this->output_section_->flags() & elfcpp::SHF_ALLOC) != 0 |
2171 | || this->output_section_->is_noload())) | |
a445fddf ILT |
2172 | this->output_section_->set_address(address); |
2173 | ||
8f2eb564 ILT |
2174 | this->evaluated_address_ = address; |
2175 | this->evaluated_addralign_ = align; | |
2176 | ||
2177 | if (this->load_address_ == NULL) | |
2178 | this->evaluated_load_address_ = address; | |
2179 | else | |
a445fddf | 2180 | { |
77e65537 | 2181 | Output_section* dummy; |
55458500 | 2182 | uint64_t laddr = |
919ed24c | 2183 | this->load_address_->eval_with_dot(symtab, layout, true, *dot_value, |
f6973bdc ILT |
2184 | this->output_section_, &dummy, |
2185 | NULL); | |
8f2eb564 | 2186 | if (this->output_section_ != NULL) |
55458500 ILT |
2187 | this->output_section_->set_load_address(laddr); |
2188 | this->evaluated_load_address_ = laddr; | |
a445fddf ILT |
2189 | } |
2190 | ||
2191 | uint64_t subalign; | |
2192 | if (this->subalign_ == NULL) | |
2193 | subalign = 0; | |
2194 | else | |
2195 | { | |
77e65537 | 2196 | Output_section* subalign_section; |
919ed24c ILT |
2197 | subalign = this->subalign_->eval_with_dot(symtab, layout, true, |
2198 | *dot_value, NULL, | |
f6973bdc | 2199 | &subalign_section, NULL); |
77e65537 ILT |
2200 | if (subalign_section != NULL) |
2201 | gold_warning(_("subalign of section %s is not absolute"), | |
2202 | this->name_.c_str()); | |
a445fddf ILT |
2203 | } |
2204 | ||
2205 | std::string fill; | |
2206 | if (this->fill_ != NULL) | |
2207 | { | |
2208 | // FIXME: The GNU linker supports fill values of arbitrary | |
2209 | // length. | |
77e65537 | 2210 | Output_section* fill_section; |
919ed24c | 2211 | uint64_t fill_val = this->fill_->eval_with_dot(symtab, layout, true, |
a445fddf | 2212 | *dot_value, |
f6973bdc ILT |
2213 | NULL, &fill_section, |
2214 | NULL); | |
77e65537 ILT |
2215 | if (fill_section != NULL) |
2216 | gold_warning(_("fill of section %s is not absolute"), | |
2217 | this->name_.c_str()); | |
a445fddf ILT |
2218 | unsigned char fill_buff[4]; |
2219 | elfcpp::Swap_unaligned<32, true>::writeval(fill_buff, fill_val); | |
2220 | fill.assign(reinterpret_cast<char*>(fill_buff), 4); | |
2221 | } | |
2222 | ||
2223 | Input_section_list input_sections; | |
2224 | if (this->output_section_ != NULL) | |
2225 | { | |
2226 | // Get the list of input sections attached to this output | |
2227 | // section. This will leave the output section with only | |
2228 | // Output_section_data entries. | |
2229 | address += this->output_section_->get_input_sections(address, | |
2230 | fill, | |
2231 | &input_sections); | |
2232 | *dot_value = address; | |
2233 | } | |
2234 | ||
77e65537 | 2235 | Output_section* dot_section = this->output_section_; |
a445fddf ILT |
2236 | for (Output_section_elements::iterator p = this->elements_.begin(); |
2237 | p != this->elements_.end(); | |
2238 | ++p) | |
2239 | (*p)->set_section_addresses(symtab, layout, this->output_section_, | |
f6973bdc ILT |
2240 | subalign, dot_value, dot_alignment, |
2241 | &dot_section, &fill, &input_sections); | |
a445fddf ILT |
2242 | |
2243 | gold_assert(input_sections.empty()); | |
fd247bfe ILT |
2244 | |
2245 | if (this->load_address_ == NULL || this->output_section_ == NULL) | |
2246 | *load_address = *dot_value; | |
2247 | else | |
2248 | *load_address = (this->output_section_->load_address() | |
2249 | + (*dot_value - start_address)); | |
2d924fd9 ILT |
2250 | |
2251 | if (this->output_section_ != NULL) | |
2252 | { | |
2253 | if (this->is_relro_) | |
2254 | this->output_section_->set_is_relro(); | |
2255 | else | |
2256 | this->output_section_->clear_is_relro(); | |
1e5d2fb1 DK |
2257 | |
2258 | // If this is a NOLOAD section, keep dot and load address unchanged. | |
2259 | if (this->output_section_->is_noload()) | |
2260 | { | |
2261 | *dot_value = old_dot_value; | |
2262 | *load_address = old_load_address; | |
2263 | } | |
2d924fd9 | 2264 | } |
a445fddf ILT |
2265 | } |
2266 | ||
3802b2dd ILT |
2267 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
2268 | // this section is constrained, and the input sections do not match, | |
2269 | // return the constraint, and set *POSD. | |
2270 | ||
2271 | Section_constraint | |
2272 | Output_section_definition::check_constraint(Output_section_definition** posd) | |
2273 | { | |
2274 | switch (this->constraint_) | |
2275 | { | |
2276 | case CONSTRAINT_NONE: | |
2277 | return CONSTRAINT_NONE; | |
2278 | ||
2279 | case CONSTRAINT_ONLY_IF_RO: | |
2280 | if (this->output_section_ != NULL | |
2281 | && (this->output_section_->flags() & elfcpp::SHF_WRITE) != 0) | |
2282 | { | |
2283 | *posd = this; | |
2284 | return CONSTRAINT_ONLY_IF_RO; | |
2285 | } | |
2286 | return CONSTRAINT_NONE; | |
2287 | ||
2288 | case CONSTRAINT_ONLY_IF_RW: | |
2289 | if (this->output_section_ != NULL | |
2290 | && (this->output_section_->flags() & elfcpp::SHF_WRITE) == 0) | |
2291 | { | |
2292 | *posd = this; | |
2293 | return CONSTRAINT_ONLY_IF_RW; | |
2294 | } | |
2295 | return CONSTRAINT_NONE; | |
2296 | ||
2297 | case CONSTRAINT_SPECIAL: | |
2298 | if (this->output_section_ != NULL) | |
2299 | gold_error(_("SPECIAL constraints are not implemented")); | |
2300 | return CONSTRAINT_NONE; | |
2301 | ||
2302 | default: | |
2303 | gold_unreachable(); | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | // See if this is the alternate output section for a constrained | |
2308 | // output section. If it is, transfer the Output_section and return | |
2309 | // true. Otherwise return false. | |
2310 | ||
2311 | bool | |
2312 | Output_section_definition::alternate_constraint( | |
2313 | Output_section_definition* posd, | |
2314 | Section_constraint constraint) | |
2315 | { | |
2316 | if (this->name_ != posd->name_) | |
2317 | return false; | |
2318 | ||
2319 | switch (constraint) | |
2320 | { | |
2321 | case CONSTRAINT_ONLY_IF_RO: | |
2322 | if (this->constraint_ != CONSTRAINT_ONLY_IF_RW) | |
2323 | return false; | |
2324 | break; | |
2325 | ||
2326 | case CONSTRAINT_ONLY_IF_RW: | |
2327 | if (this->constraint_ != CONSTRAINT_ONLY_IF_RO) | |
2328 | return false; | |
2329 | break; | |
2330 | ||
2331 | default: | |
2332 | gold_unreachable(); | |
2333 | } | |
2334 | ||
2335 | // We have found the alternate constraint. We just need to move | |
2336 | // over the Output_section. When constraints are used properly, | |
2337 | // THIS should not have an output_section pointer, as all the input | |
2338 | // sections should have matched the other definition. | |
2339 | ||
2340 | if (this->output_section_ != NULL) | |
2341 | gold_error(_("mismatched definition for constrained sections")); | |
2342 | ||
2343 | this->output_section_ = posd->output_section_; | |
2344 | posd->output_section_ = NULL; | |
2345 | ||
2d924fd9 ILT |
2346 | if (this->is_relro_) |
2347 | this->output_section_->set_is_relro(); | |
2348 | else | |
2349 | this->output_section_->clear_is_relro(); | |
2350 | ||
3802b2dd ILT |
2351 | return true; |
2352 | } | |
2353 | ||
1c4f3631 | 2354 | // Get the list of segments to use for an allocated section when using |
2cefc357 | 2355 | // a PHDRS clause. |
1c4f3631 ILT |
2356 | |
2357 | Output_section* | |
2cefc357 ILT |
2358 | Output_section_definition::allocate_to_segment(String_list** phdrs_list, |
2359 | bool* orphan) | |
1c4f3631 | 2360 | { |
d103a984 RÁE |
2361 | // Update phdrs_list even if we don't have an output section. It |
2362 | // might be used by the following sections. | |
2363 | if (this->phdrs_ != NULL) | |
2364 | *phdrs_list = this->phdrs_; | |
2365 | ||
1c4f3631 ILT |
2366 | if (this->output_section_ == NULL) |
2367 | return NULL; | |
2368 | if ((this->output_section_->flags() & elfcpp::SHF_ALLOC) == 0) | |
2369 | return NULL; | |
2cefc357 | 2370 | *orphan = false; |
1c4f3631 ILT |
2371 | return this->output_section_; |
2372 | } | |
2373 | ||
8f2eb564 ILT |
2374 | // Look for an output section by name and return the address, the load |
2375 | // address, the alignment, and the size. This is used when an | |
2376 | // expression refers to an output section which was not actually | |
2377 | // created. This returns true if the section was found, false | |
2378 | // otherwise. | |
2379 | ||
2380 | bool | |
2381 | Output_section_definition::get_output_section_info(const char* name, | |
2382 | uint64_t* address, | |
2383 | uint64_t* load_address, | |
2ea97941 | 2384 | uint64_t* addralign, |
8f2eb564 ILT |
2385 | uint64_t* size) const |
2386 | { | |
2387 | if (this->name_ != name) | |
2388 | return false; | |
2389 | ||
2390 | if (this->output_section_ != NULL) | |
2391 | { | |
2392 | *address = this->output_section_->address(); | |
2393 | if (this->output_section_->has_load_address()) | |
2394 | *load_address = this->output_section_->load_address(); | |
2395 | else | |
2396 | *load_address = *address; | |
2ea97941 | 2397 | *addralign = this->output_section_->addralign(); |
8f2eb564 ILT |
2398 | *size = this->output_section_->current_data_size(); |
2399 | } | |
2400 | else | |
2401 | { | |
2402 | *address = this->evaluated_address_; | |
2403 | *load_address = this->evaluated_load_address_; | |
2ea97941 | 2404 | *addralign = this->evaluated_addralign_; |
8f2eb564 ILT |
2405 | *size = 0; |
2406 | } | |
2407 | ||
2408 | return true; | |
2409 | } | |
2410 | ||
494e05f4 ILT |
2411 | // Print for debugging. |
2412 | ||
2413 | void | |
2414 | Output_section_definition::print(FILE* f) const | |
2415 | { | |
2416 | fprintf(f, " %s ", this->name_.c_str()); | |
2417 | ||
2418 | if (this->address_ != NULL) | |
2419 | { | |
2420 | this->address_->print(f); | |
2421 | fprintf(f, " "); | |
2422 | } | |
2423 | ||
1e5d2fb1 DK |
2424 | if (this->script_section_type_ != SCRIPT_SECTION_TYPE_NONE) |
2425 | fprintf(f, "(%s) ", | |
2426 | this->script_section_type_name(this->script_section_type_)); | |
2427 | ||
494e05f4 ILT |
2428 | fprintf(f, ": "); |
2429 | ||
2430 | if (this->load_address_ != NULL) | |
2431 | { | |
2432 | fprintf(f, "AT("); | |
2433 | this->load_address_->print(f); | |
2434 | fprintf(f, ") "); | |
2435 | } | |
2436 | ||
2437 | if (this->align_ != NULL) | |
2438 | { | |
2439 | fprintf(f, "ALIGN("); | |
2440 | this->align_->print(f); | |
2441 | fprintf(f, ") "); | |
2442 | } | |
2443 | ||
2444 | if (this->subalign_ != NULL) | |
2445 | { | |
2446 | fprintf(f, "SUBALIGN("); | |
2447 | this->subalign_->print(f); | |
2448 | fprintf(f, ") "); | |
2449 | } | |
2450 | ||
2451 | fprintf(f, "{\n"); | |
2452 | ||
2453 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2454 | p != this->elements_.end(); | |
2455 | ++p) | |
2456 | (*p)->print(f); | |
2457 | ||
2458 | fprintf(f, " }"); | |
2459 | ||
2460 | if (this->fill_ != NULL) | |
2461 | { | |
2462 | fprintf(f, " = "); | |
2463 | this->fill_->print(f); | |
2464 | } | |
2465 | ||
7d26c6cc ILT |
2466 | if (this->phdrs_ != NULL) |
2467 | { | |
2468 | for (String_list::const_iterator p = this->phdrs_->begin(); | |
2469 | p != this->phdrs_->end(); | |
2470 | ++p) | |
2471 | fprintf(f, " :%s", p->c_str()); | |
2472 | } | |
2473 | ||
494e05f4 ILT |
2474 | fprintf(f, "\n"); |
2475 | } | |
2476 | ||
1e5d2fb1 DK |
2477 | Script_sections::Section_type |
2478 | Output_section_definition::section_type() const | |
2479 | { | |
2480 | switch (this->script_section_type_) | |
2481 | { | |
2482 | case SCRIPT_SECTION_TYPE_NONE: | |
2483 | return Script_sections::ST_NONE; | |
2484 | case SCRIPT_SECTION_TYPE_NOLOAD: | |
2485 | return Script_sections::ST_NOLOAD; | |
2486 | case SCRIPT_SECTION_TYPE_COPY: | |
2487 | case SCRIPT_SECTION_TYPE_DSECT: | |
2488 | case SCRIPT_SECTION_TYPE_INFO: | |
2489 | case SCRIPT_SECTION_TYPE_OVERLAY: | |
2490 | // There are not really support so we treat them as ST_NONE. The | |
2491 | // parse should have issued errors for them already. | |
2492 | return Script_sections::ST_NONE; | |
2493 | default: | |
2494 | gold_unreachable(); | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | // Return the name of a script section type. | |
2499 | ||
2500 | const char* | |
ca09d69a | 2501 | Output_section_definition::script_section_type_name( |
1e5d2fb1 DK |
2502 | Script_section_type script_section_type) |
2503 | { | |
2504 | switch (script_section_type) | |
2505 | { | |
2506 | case SCRIPT_SECTION_TYPE_NONE: | |
2507 | return "NONE"; | |
2508 | case SCRIPT_SECTION_TYPE_NOLOAD: | |
2509 | return "NOLOAD"; | |
2510 | case SCRIPT_SECTION_TYPE_DSECT: | |
2511 | return "DSECT"; | |
2512 | case SCRIPT_SECTION_TYPE_COPY: | |
2513 | return "COPY"; | |
2514 | case SCRIPT_SECTION_TYPE_INFO: | |
2515 | return "INFO"; | |
2516 | case SCRIPT_SECTION_TYPE_OVERLAY: | |
2517 | return "OVERLAY"; | |
2518 | default: | |
2519 | gold_unreachable(); | |
2520 | } | |
2521 | } | |
2522 | ||
7f8cd844 NC |
2523 | void |
2524 | Output_section_definition::set_memory_region(Memory_region* mr, bool set_vma) | |
2525 | { | |
2526 | gold_assert(mr != NULL); | |
2527 | // Add the current section to the specified region's list. | |
2528 | mr->add_section(this, set_vma); | |
2529 | } | |
2530 | ||
a445fddf ILT |
2531 | // An output section created to hold orphaned input sections. These |
2532 | // do not actually appear in linker scripts. However, for convenience | |
2533 | // when setting the output section addresses, we put a marker to these | |
2534 | // sections in the appropriate place in the list of SECTIONS elements. | |
2535 | ||
2536 | class Orphan_output_section : public Sections_element | |
2537 | { | |
2538 | public: | |
2539 | Orphan_output_section(Output_section* os) | |
2540 | : os_(os) | |
2541 | { } | |
2542 | ||
0d371ad3 ILT |
2543 | // Return whether the orphan output section is relro. We can just |
2544 | // check the output section because we always set the flag, if | |
2545 | // needed, just after we create the Orphan_output_section. | |
a445fddf | 2546 | bool |
0d371ad3 ILT |
2547 | is_relro() const |
2548 | { return this->os_->is_relro(); } | |
2549 | ||
2550 | // Initialize OSP with an output section. This should have been | |
2551 | // done already. | |
2552 | void | |
2553 | orphan_section_init(Orphan_section_placement*, | |
2554 | Script_sections::Elements_iterator) | |
2555 | { gold_unreachable(); } | |
a445fddf ILT |
2556 | |
2557 | // Set section addresses. | |
2558 | void | |
f6973bdc ILT |
2559 | set_section_addresses(Symbol_table*, Layout*, uint64_t*, uint64_t*, |
2560 | uint64_t*); | |
a445fddf | 2561 | |
1c4f3631 | 2562 | // Get the list of segments to use for an allocated section when |
2cefc357 | 2563 | // using a PHDRS clause. |
1c4f3631 | 2564 | Output_section* |
2cefc357 | 2565 | allocate_to_segment(String_list**, bool*); |
1c4f3631 | 2566 | |
2d924fd9 ILT |
2567 | // Return the associated Output_section. |
2568 | Output_section* | |
2569 | get_output_section() const | |
2570 | { return this->os_; } | |
2571 | ||
a445fddf ILT |
2572 | // Print for debugging. |
2573 | void | |
2574 | print(FILE* f) const | |
2575 | { | |
2576 | fprintf(f, " marker for orphaned output section %s\n", | |
2577 | this->os_->name()); | |
2578 | } | |
2579 | ||
2580 | private: | |
2581 | Output_section* os_; | |
2582 | }; | |
2583 | ||
a445fddf ILT |
2584 | // Set section addresses. |
2585 | ||
2586 | void | |
2587 | Orphan_output_section::set_section_addresses(Symbol_table*, Layout*, | |
fd247bfe | 2588 | uint64_t* dot_value, |
f6973bdc | 2589 | uint64_t*, |
fd247bfe | 2590 | uint64_t* load_address) |
a445fddf | 2591 | { |
6625d24e | 2592 | typedef std::list<Output_section::Input_section> Input_section_list; |
a445fddf | 2593 | |
fd247bfe ILT |
2594 | bool have_load_address = *load_address != *dot_value; |
2595 | ||
a445fddf ILT |
2596 | uint64_t address = *dot_value; |
2597 | address = align_address(address, this->os_->addralign()); | |
2598 | ||
2599 | if ((this->os_->flags() & elfcpp::SHF_ALLOC) != 0) | |
fd247bfe ILT |
2600 | { |
2601 | this->os_->set_address(address); | |
2602 | if (have_load_address) | |
2603 | this->os_->set_load_address(align_address(*load_address, | |
2604 | this->os_->addralign())); | |
2605 | } | |
a445fddf ILT |
2606 | |
2607 | Input_section_list input_sections; | |
2608 | address += this->os_->get_input_sections(address, "", &input_sections); | |
2609 | ||
2610 | for (Input_section_list::iterator p = input_sections.begin(); | |
2611 | p != input_sections.end(); | |
2612 | ++p) | |
2613 | { | |
6625d24e DK |
2614 | uint64_t addralign = p->addralign(); |
2615 | if (!p->is_input_section()) | |
2616 | p->output_section_data()->finalize_data_size(); | |
2617 | uint64_t size = p->data_size(); | |
2ea97941 | 2618 | address = align_address(address, addralign); |
6625d24e | 2619 | this->os_->add_script_input_section(*p); |
a445fddf ILT |
2620 | address += size; |
2621 | } | |
2622 | ||
661be1e2 ILT |
2623 | // An SHF_TLS/SHT_NOBITS section does not take up any address space. |
2624 | if (this->os_ == NULL | |
2625 | || (this->os_->flags() & elfcpp::SHF_TLS) == 0 | |
2626 | || this->os_->type() != elfcpp::SHT_NOBITS) | |
2627 | { | |
2628 | if (!have_load_address) | |
2629 | *load_address = address; | |
2630 | else | |
2631 | *load_address += address - *dot_value; | |
fd247bfe | 2632 | |
661be1e2 ILT |
2633 | *dot_value = address; |
2634 | } | |
a445fddf ILT |
2635 | } |
2636 | ||
1c4f3631 ILT |
2637 | // Get the list of segments to use for an allocated section when using |
2638 | // a PHDRS clause. If this is an allocated section, return the | |
2639 | // Output_section. We don't change the list of segments. | |
2640 | ||
2641 | Output_section* | |
2cefc357 | 2642 | Orphan_output_section::allocate_to_segment(String_list**, bool* orphan) |
1c4f3631 ILT |
2643 | { |
2644 | if ((this->os_->flags() & elfcpp::SHF_ALLOC) == 0) | |
2645 | return NULL; | |
2cefc357 | 2646 | *orphan = true; |
1c4f3631 ILT |
2647 | return this->os_; |
2648 | } | |
2649 | ||
2650 | // Class Phdrs_element. A program header from a PHDRS clause. | |
2651 | ||
2652 | class Phdrs_element | |
2653 | { | |
2654 | public: | |
2ea97941 ILT |
2655 | Phdrs_element(const char* name, size_t namelen, unsigned int type, |
2656 | bool includes_filehdr, bool includes_phdrs, | |
1c4f3631 | 2657 | bool is_flags_valid, unsigned int flags, |
2ea97941 ILT |
2658 | Expression* load_address) |
2659 | : name_(name, namelen), type_(type), includes_filehdr_(includes_filehdr), | |
2660 | includes_phdrs_(includes_phdrs), is_flags_valid_(is_flags_valid), | |
2661 | flags_(flags), load_address_(load_address), load_address_value_(0), | |
1c4f3631 ILT |
2662 | segment_(NULL) |
2663 | { } | |
2664 | ||
2665 | // Return the name of this segment. | |
2666 | const std::string& | |
2667 | name() const | |
2668 | { return this->name_; } | |
2669 | ||
2670 | // Return the type of the segment. | |
2671 | unsigned int | |
2672 | type() const | |
2673 | { return this->type_; } | |
2674 | ||
2675 | // Whether to include the file header. | |
2676 | bool | |
2677 | includes_filehdr() const | |
2678 | { return this->includes_filehdr_; } | |
2679 | ||
2680 | // Whether to include the program headers. | |
2681 | bool | |
2682 | includes_phdrs() const | |
2683 | { return this->includes_phdrs_; } | |
2684 | ||
2685 | // Return whether there is a load address. | |
2686 | bool | |
2687 | has_load_address() const | |
2688 | { return this->load_address_ != NULL; } | |
2689 | ||
2690 | // Evaluate the load address expression if there is one. | |
2691 | void | |
2ea97941 | 2692 | eval_load_address(Symbol_table* symtab, Layout* layout) |
1c4f3631 ILT |
2693 | { |
2694 | if (this->load_address_ != NULL) | |
2ea97941 | 2695 | this->load_address_value_ = this->load_address_->eval(symtab, layout, |
919ed24c | 2696 | true); |
1c4f3631 ILT |
2697 | } |
2698 | ||
2699 | // Return the load address. | |
2700 | uint64_t | |
2701 | load_address() const | |
2702 | { | |
2703 | gold_assert(this->load_address_ != NULL); | |
2704 | return this->load_address_value_; | |
2705 | } | |
2706 | ||
2707 | // Create the segment. | |
2708 | Output_segment* | |
2709 | create_segment(Layout* layout) | |
2710 | { | |
2711 | this->segment_ = layout->make_output_segment(this->type_, this->flags_); | |
2712 | return this->segment_; | |
2713 | } | |
2714 | ||
2715 | // Return the segment. | |
2716 | Output_segment* | |
2717 | segment() | |
2718 | { return this->segment_; } | |
2719 | ||
20e6d0d6 DK |
2720 | // Release the segment. |
2721 | void | |
2722 | release_segment() | |
2723 | { this->segment_ = NULL; } | |
2724 | ||
1c4f3631 ILT |
2725 | // Set the segment flags if appropriate. |
2726 | void | |
2727 | set_flags_if_valid() | |
2728 | { | |
2729 | if (this->is_flags_valid_) | |
2730 | this->segment_->set_flags(this->flags_); | |
2731 | } | |
2732 | ||
7d26c6cc ILT |
2733 | // Print for debugging. |
2734 | void | |
2735 | print(FILE*) const; | |
2736 | ||
1c4f3631 ILT |
2737 | private: |
2738 | // The name used in the script. | |
2739 | std::string name_; | |
2740 | // The type of the segment (PT_LOAD, etc.). | |
2741 | unsigned int type_; | |
2742 | // Whether this segment includes the file header. | |
2743 | bool includes_filehdr_; | |
2744 | // Whether this segment includes the section headers. | |
2745 | bool includes_phdrs_; | |
2746 | // Whether the flags were explicitly specified. | |
2747 | bool is_flags_valid_; | |
2748 | // The flags for this segment (PF_R, etc.) if specified. | |
2749 | unsigned int flags_; | |
2750 | // The expression for the load address for this segment. This may | |
2751 | // be NULL. | |
2752 | Expression* load_address_; | |
2753 | // The actual load address from evaluating the expression. | |
2754 | uint64_t load_address_value_; | |
2755 | // The segment itself. | |
2756 | Output_segment* segment_; | |
2757 | }; | |
2758 | ||
7d26c6cc ILT |
2759 | // Print for debugging. |
2760 | ||
2761 | void | |
2762 | Phdrs_element::print(FILE* f) const | |
2763 | { | |
2764 | fprintf(f, " %s 0x%x", this->name_.c_str(), this->type_); | |
2765 | if (this->includes_filehdr_) | |
2766 | fprintf(f, " FILEHDR"); | |
2767 | if (this->includes_phdrs_) | |
2768 | fprintf(f, " PHDRS"); | |
2769 | if (this->is_flags_valid_) | |
2770 | fprintf(f, " FLAGS(%u)", this->flags_); | |
2771 | if (this->load_address_ != NULL) | |
2772 | { | |
2773 | fprintf(f, " AT("); | |
2774 | this->load_address_->print(f); | |
2775 | fprintf(f, ")"); | |
2776 | } | |
2777 | fprintf(f, ";\n"); | |
2778 | } | |
2779 | ||
7f8cd844 NC |
2780 | // Add a memory region. |
2781 | ||
2782 | void | |
2783 | Script_sections::add_memory_region(const char* name, size_t namelen, | |
2784 | unsigned int attributes, | |
2785 | Expression* start, Expression* length) | |
2786 | { | |
2787 | if (this->memory_regions_ == NULL) | |
2788 | this->memory_regions_ = new Memory_regions(); | |
2789 | else if (this->find_memory_region(name, namelen)) | |
2790 | { | |
33dbc701 RÁE |
2791 | gold_error (_("region '%.*s' already defined"), static_cast<int>(namelen), |
2792 | name); | |
7f8cd844 NC |
2793 | // FIXME: Add a GOLD extension to allow multiple regions with the same |
2794 | // name. This would amount to a single region covering disjoint blocks | |
2795 | // of memory, which is useful for embedded devices. | |
2796 | } | |
2797 | ||
2798 | // FIXME: Check the length and start values. Currently we allow | |
2799 | // non-constant expressions for these values, whereas LD does not. | |
2800 | ||
2801 | // FIXME: Add a GOLD extension to allow NEGATIVE LENGTHS. This would | |
2802 | // describe a region that packs from the end address going down, rather | |
2803 | // than the start address going up. This would be useful for embedded | |
2804 | // devices. | |
2805 | ||
2806 | this->memory_regions_->push_back(new Memory_region(name, namelen, attributes, | |
2807 | start, length)); | |
2808 | } | |
2809 | ||
2810 | // Find a memory region. | |
2811 | ||
2812 | Memory_region* | |
2813 | Script_sections::find_memory_region(const char* name, size_t namelen) | |
2814 | { | |
2815 | if (this->memory_regions_ == NULL) | |
2816 | return NULL; | |
2817 | ||
2818 | for (Memory_regions::const_iterator m = this->memory_regions_->begin(); | |
2819 | m != this->memory_regions_->end(); | |
2820 | ++m) | |
2821 | if ((*m)->name_match(name, namelen)) | |
2822 | return *m; | |
2823 | ||
2824 | return NULL; | |
2825 | } | |
2826 | ||
2827 | // Find a memory region's origin. | |
2828 | ||
2829 | Expression* | |
2830 | Script_sections::find_memory_region_origin(const char* name, size_t namelen) | |
2831 | { | |
2832 | Memory_region* mr = find_memory_region(name, namelen); | |
2833 | if (mr == NULL) | |
2834 | return NULL; | |
2835 | ||
2836 | return mr->start_address(); | |
2837 | } | |
2838 | ||
2839 | // Find a memory region's length. | |
2840 | ||
2841 | Expression* | |
2842 | Script_sections::find_memory_region_length(const char* name, size_t namelen) | |
2843 | { | |
2844 | Memory_region* mr = find_memory_region(name, namelen); | |
2845 | if (mr == NULL) | |
2846 | return NULL; | |
2847 | ||
2848 | return mr->length(); | |
2849 | } | |
2850 | ||
2851 | // Set the memory region to use for the current section. | |
2852 | ||
2853 | void | |
2854 | Script_sections::set_memory_region(Memory_region* mr, bool set_vma) | |
2855 | { | |
2856 | gold_assert(!this->sections_elements_->empty()); | |
2857 | this->sections_elements_->back()->set_memory_region(mr, set_vma); | |
2858 | } | |
2859 | ||
494e05f4 ILT |
2860 | // Class Script_sections. |
2861 | ||
2862 | Script_sections::Script_sections() | |
2863 | : saw_sections_clause_(false), | |
2864 | in_sections_clause_(false), | |
2865 | sections_elements_(NULL), | |
1c4f3631 | 2866 | output_section_(NULL), |
7f8cd844 | 2867 | memory_regions_(NULL), |
2d924fd9 | 2868 | phdrs_elements_(NULL), |
0d371ad3 ILT |
2869 | orphan_section_placement_(NULL), |
2870 | data_segment_align_start_(), | |
2871 | saw_data_segment_align_(false), | |
3c12dcdb DK |
2872 | saw_relro_end_(false), |
2873 | saw_segment_start_expression_(false) | |
494e05f4 ILT |
2874 | { |
2875 | } | |
2876 | ||
2877 | // Start a SECTIONS clause. | |
2878 | ||
2879 | void | |
2880 | Script_sections::start_sections() | |
2881 | { | |
2882 | gold_assert(!this->in_sections_clause_ && this->output_section_ == NULL); | |
2883 | this->saw_sections_clause_ = true; | |
2884 | this->in_sections_clause_ = true; | |
2885 | if (this->sections_elements_ == NULL) | |
2886 | this->sections_elements_ = new Sections_elements; | |
2887 | } | |
2888 | ||
2889 | // Finish a SECTIONS clause. | |
2890 | ||
2891 | void | |
2892 | Script_sections::finish_sections() | |
2893 | { | |
2894 | gold_assert(this->in_sections_clause_ && this->output_section_ == NULL); | |
2895 | this->in_sections_clause_ = false; | |
2896 | } | |
2897 | ||
2898 | // Add a symbol to be defined. | |
2899 | ||
2900 | void | |
2901 | Script_sections::add_symbol_assignment(const char* name, size_t length, | |
2902 | Expression* val, bool provide, | |
2903 | bool hidden) | |
2904 | { | |
2905 | if (this->output_section_ != NULL) | |
2906 | this->output_section_->add_symbol_assignment(name, length, val, | |
2907 | provide, hidden); | |
2908 | else | |
2909 | { | |
2910 | Sections_element* p = new Sections_element_assignment(name, length, | |
2911 | val, provide, | |
2912 | hidden); | |
2913 | this->sections_elements_->push_back(p); | |
2914 | } | |
2915 | } | |
2916 | ||
a445fddf ILT |
2917 | // Add an assignment to the special dot symbol. |
2918 | ||
2919 | void | |
2920 | Script_sections::add_dot_assignment(Expression* val) | |
2921 | { | |
2922 | if (this->output_section_ != NULL) | |
2923 | this->output_section_->add_dot_assignment(val); | |
2924 | else | |
2925 | { | |
12edd763 ILT |
2926 | // The GNU linker permits assignments to . to appears outside of |
2927 | // a SECTIONS clause, and treats it as appearing inside, so | |
2928 | // sections_elements_ may be NULL here. | |
2929 | if (this->sections_elements_ == NULL) | |
2930 | { | |
2931 | this->sections_elements_ = new Sections_elements; | |
2932 | this->saw_sections_clause_ = true; | |
2933 | } | |
2934 | ||
a445fddf ILT |
2935 | Sections_element* p = new Sections_element_dot_assignment(val); |
2936 | this->sections_elements_->push_back(p); | |
2937 | } | |
2938 | } | |
2939 | ||
494e05f4 ILT |
2940 | // Add an assertion. |
2941 | ||
2942 | void | |
2943 | Script_sections::add_assertion(Expression* check, const char* message, | |
2944 | size_t messagelen) | |
2945 | { | |
2946 | if (this->output_section_ != NULL) | |
2947 | this->output_section_->add_assertion(check, message, messagelen); | |
2948 | else | |
2949 | { | |
2950 | Sections_element* p = new Sections_element_assertion(check, message, | |
2951 | messagelen); | |
2952 | this->sections_elements_->push_back(p); | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | // Start processing entries for an output section. | |
2957 | ||
2958 | void | |
2959 | Script_sections::start_output_section( | |
2960 | const char* name, | |
2961 | size_t namelen, | |
ca09d69a | 2962 | const Parser_output_section_header* header) |
494e05f4 ILT |
2963 | { |
2964 | Output_section_definition* posd = new Output_section_definition(name, | |
2965 | namelen, | |
2966 | header); | |
2967 | this->sections_elements_->push_back(posd); | |
2968 | gold_assert(this->output_section_ == NULL); | |
2969 | this->output_section_ = posd; | |
2970 | } | |
2971 | ||
2972 | // Stop processing entries for an output section. | |
2973 | ||
2974 | void | |
2975 | Script_sections::finish_output_section( | |
2976 | const Parser_output_section_trailer* trailer) | |
2977 | { | |
2978 | gold_assert(this->output_section_ != NULL); | |
2979 | this->output_section_->finish(trailer); | |
2980 | this->output_section_ = NULL; | |
2981 | } | |
2982 | ||
2983 | // Add a data item to the current output section. | |
2984 | ||
2985 | void | |
2986 | Script_sections::add_data(int size, bool is_signed, Expression* val) | |
2987 | { | |
2988 | gold_assert(this->output_section_ != NULL); | |
2989 | this->output_section_->add_data(size, is_signed, val); | |
2990 | } | |
2991 | ||
2992 | // Add a fill value setting to the current output section. | |
2993 | ||
2994 | void | |
2995 | Script_sections::add_fill(Expression* val) | |
2996 | { | |
2997 | gold_assert(this->output_section_ != NULL); | |
2998 | this->output_section_->add_fill(val); | |
2999 | } | |
3000 | ||
3001 | // Add an input section specification to the current output section. | |
3002 | ||
3003 | void | |
3004 | Script_sections::add_input_section(const Input_section_spec* spec, bool keep) | |
3005 | { | |
3006 | gold_assert(this->output_section_ != NULL); | |
3007 | this->output_section_->add_input_section(spec, keep); | |
3008 | } | |
3009 | ||
2d924fd9 ILT |
3010 | // This is called when we see DATA_SEGMENT_ALIGN. It means that any |
3011 | // subsequent output sections may be relro. | |
3012 | ||
3013 | void | |
3014 | Script_sections::data_segment_align() | |
3015 | { | |
0d371ad3 | 3016 | if (this->saw_data_segment_align_) |
2d924fd9 | 3017 | gold_error(_("DATA_SEGMENT_ALIGN may only appear once in a linker script")); |
0d371ad3 ILT |
3018 | gold_assert(!this->sections_elements_->empty()); |
3019 | Sections_elements::iterator p = this->sections_elements_->end(); | |
3020 | --p; | |
3021 | this->data_segment_align_start_ = p; | |
3022 | this->saw_data_segment_align_ = true; | |
2d924fd9 ILT |
3023 | } |
3024 | ||
3025 | // This is called when we see DATA_SEGMENT_RELRO_END. It means that | |
3026 | // any output sections seen since DATA_SEGMENT_ALIGN are relro. | |
3027 | ||
3028 | void | |
3029 | Script_sections::data_segment_relro_end() | |
3030 | { | |
3031 | if (this->saw_relro_end_) | |
3032 | gold_error(_("DATA_SEGMENT_RELRO_END may only appear once " | |
3033 | "in a linker script")); | |
3034 | this->saw_relro_end_ = true; | |
3035 | ||
0d371ad3 | 3036 | if (!this->saw_data_segment_align_) |
2d924fd9 ILT |
3037 | gold_error(_("DATA_SEGMENT_RELRO_END must follow DATA_SEGMENT_ALIGN")); |
3038 | else | |
3039 | { | |
0d371ad3 ILT |
3040 | Sections_elements::iterator p = this->data_segment_align_start_; |
3041 | for (++p; p != this->sections_elements_->end(); ++p) | |
3042 | (*p)->set_is_relro(); | |
2d924fd9 ILT |
3043 | } |
3044 | } | |
3045 | ||
919ed24c ILT |
3046 | // Create any required sections. |
3047 | ||
3048 | void | |
3049 | Script_sections::create_sections(Layout* layout) | |
3050 | { | |
3051 | if (!this->saw_sections_clause_) | |
3052 | return; | |
3053 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3054 | p != this->sections_elements_->end(); | |
3055 | ++p) | |
3056 | (*p)->create_sections(layout); | |
3057 | } | |
3058 | ||
a445fddf ILT |
3059 | // Add any symbols we are defining to the symbol table. |
3060 | ||
3061 | void | |
3062 | Script_sections::add_symbols_to_table(Symbol_table* symtab) | |
3063 | { | |
3064 | if (!this->saw_sections_clause_) | |
3065 | return; | |
3066 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3067 | p != this->sections_elements_->end(); | |
3068 | ++p) | |
3069 | (*p)->add_symbols_to_table(symtab); | |
3070 | } | |
3071 | ||
3072 | // Finalize symbols and check assertions. | |
3073 | ||
3074 | void | |
3075 | Script_sections::finalize_symbols(Symbol_table* symtab, const Layout* layout) | |
3076 | { | |
3077 | if (!this->saw_sections_clause_) | |
3078 | return; | |
a445fddf ILT |
3079 | uint64_t dot_value = 0; |
3080 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3081 | p != this->sections_elements_->end(); | |
3082 | ++p) | |
77e65537 | 3083 | (*p)->finalize_symbols(symtab, layout, &dot_value); |
a445fddf ILT |
3084 | } |
3085 | ||
3086 | // Return the name of the output section to use for an input file name | |
3087 | // and section name. | |
3088 | ||
3089 | const char* | |
1e5d2fb1 DK |
3090 | Script_sections::output_section_name( |
3091 | const char* file_name, | |
3092 | const char* section_name, | |
3093 | Output_section*** output_section_slot, | |
ca09d69a | 3094 | Script_sections::Section_type* psection_type) |
a445fddf ILT |
3095 | { |
3096 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3097 | p != this->sections_elements_->end(); | |
3098 | ++p) | |
3099 | { | |
3100 | const char* ret = (*p)->output_section_name(file_name, section_name, | |
1e5d2fb1 DK |
3101 | output_section_slot, |
3102 | psection_type); | |
a445fddf ILT |
3103 | |
3104 | if (ret != NULL) | |
3105 | { | |
3106 | // The special name /DISCARD/ means that the input section | |
3107 | // should be discarded. | |
3108 | if (strcmp(ret, "/DISCARD/") == 0) | |
3109 | { | |
3110 | *output_section_slot = NULL; | |
1e5d2fb1 | 3111 | *psection_type = Script_sections::ST_NONE; |
a445fddf ILT |
3112 | return NULL; |
3113 | } | |
3114 | return ret; | |
3115 | } | |
3116 | } | |
3117 | ||
3118 | // If we couldn't find a mapping for the name, the output section | |
3119 | // gets the name of the input section. | |
3120 | ||
3121 | *output_section_slot = NULL; | |
1e5d2fb1 | 3122 | *psection_type = Script_sections::ST_NONE; |
a445fddf ILT |
3123 | |
3124 | return section_name; | |
3125 | } | |
3126 | ||
3127 | // Place a marker for an orphan output section into the SECTIONS | |
3128 | // clause. | |
3129 | ||
3130 | void | |
3131 | Script_sections::place_orphan(Output_section* os) | |
3132 | { | |
0d371ad3 ILT |
3133 | Orphan_section_placement* osp = this->orphan_section_placement_; |
3134 | if (osp == NULL) | |
a445fddf | 3135 | { |
0d371ad3 ILT |
3136 | // Initialize the Orphan_section_placement structure. |
3137 | osp = new Orphan_section_placement(); | |
3138 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3139 | p != this->sections_elements_->end(); | |
3140 | ++p) | |
3141 | (*p)->orphan_section_init(osp, p); | |
3142 | gold_assert(!this->sections_elements_->empty()); | |
3143 | Sections_elements::iterator last = this->sections_elements_->end(); | |
3144 | --last; | |
3145 | osp->last_init(last); | |
3146 | this->orphan_section_placement_ = osp; | |
a445fddf ILT |
3147 | } |
3148 | ||
0d371ad3 | 3149 | Orphan_output_section* orphan = new Orphan_output_section(os); |
2d924fd9 | 3150 | |
0d371ad3 ILT |
3151 | // Look for where to put ORPHAN. |
3152 | Sections_elements::iterator* where; | |
3153 | if (osp->find_place(os, &where)) | |
3154 | { | |
3155 | if ((**where)->is_relro()) | |
3156 | os->set_is_relro(); | |
3157 | else | |
3158 | os->clear_is_relro(); | |
3159 | ||
3160 | // We want to insert ORPHAN after *WHERE, and then update *WHERE | |
3161 | // so that the next one goes after this one. | |
3162 | Sections_elements::iterator p = *where; | |
3163 | gold_assert(p != this->sections_elements_->end()); | |
3164 | ++p; | |
3165 | *where = this->sections_elements_->insert(p, orphan); | |
3166 | } | |
2d924fd9 | 3167 | else |
0d371ad3 ILT |
3168 | { |
3169 | os->clear_is_relro(); | |
3170 | // We don't have a place to put this orphan section. Put it, | |
3171 | // and all other sections like it, at the end, but before the | |
3172 | // sections which always come at the end. | |
3173 | Sections_elements::iterator last = osp->last_place(); | |
3174 | *where = this->sections_elements_->insert(last, orphan); | |
3175 | } | |
a445fddf ILT |
3176 | } |
3177 | ||
3178 | // Set the addresses of all the output sections. Walk through all the | |
3179 | // elements, tracking the dot symbol. Apply assignments which set | |
3180 | // absolute symbol values, in case they are used when setting dot. | |
3181 | // Fill in data statement values. As we find output sections, set the | |
3182 | // address, set the address of all associated input sections, and | |
3183 | // update dot. Return the segment which should hold the file header | |
3184 | // and segment headers, if any. | |
3185 | ||
3186 | Output_segment* | |
3187 | Script_sections::set_section_addresses(Symbol_table* symtab, Layout* layout) | |
3188 | { | |
3189 | gold_assert(this->saw_sections_clause_); | |
3190 | ||
7f8cd844 NC |
3191 | // Walk the memory regions specified in this script, if any. |
3192 | if (this->memory_regions_ != NULL) | |
3193 | { | |
3194 | for (Memory_regions::const_iterator mr = this->memory_regions_->begin(); | |
3195 | mr != this->memory_regions_->end(); | |
3196 | ++mr) | |
3197 | { | |
3198 | // FIXME: What should we do with the attributes of the regions ? | |
3199 | ||
3200 | // For each region, set the VMA of the sections associated with it. | |
3201 | for (Memory_region::Section_list::const_iterator s = | |
3202 | (*mr)->get_vma_section_list_start(); | |
3203 | s != (*mr)->get_vma_section_list_end(); | |
3204 | ++s) | |
3205 | { | |
3206 | (*s)->set_section_vma((*mr)->get_current_vma_address()); | |
3207 | (*mr)->increment_vma_offset((*s)->get_section_name(), | |
3208 | (*s)->get_output_section()->current_data_size(), | |
3209 | symtab, layout); | |
3210 | } | |
3211 | ||
3212 | // Similarly, set the LMA values. | |
3213 | for (Memory_region::Section_list::const_iterator s = | |
3214 | (*mr)->get_lma_section_list_start(); | |
3215 | s != (*mr)->get_lma_section_list_end(); | |
3216 | ++s) | |
3217 | { | |
3218 | (*s)->set_section_lma((*mr)->get_current_lma_address()); | |
3219 | (*mr)->increment_lma_offset((*s)->get_section_name(), | |
3220 | (*s)->get_output_section()->current_data_size(), | |
3221 | symtab, layout); | |
3222 | } | |
3223 | } | |
3224 | } | |
3225 | ||
3802b2dd ILT |
3226 | // Implement ONLY_IF_RO/ONLY_IF_RW constraints. These are a pain |
3227 | // for our representation. | |
3228 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3229 | p != this->sections_elements_->end(); | |
3230 | ++p) | |
3231 | { | |
3232 | Output_section_definition* posd; | |
3233 | Section_constraint failed_constraint = (*p)->check_constraint(&posd); | |
3234 | if (failed_constraint != CONSTRAINT_NONE) | |
3235 | { | |
3236 | Sections_elements::iterator q; | |
3237 | for (q = this->sections_elements_->begin(); | |
3238 | q != this->sections_elements_->end(); | |
3239 | ++q) | |
3240 | { | |
3241 | if (q != p) | |
3242 | { | |
3243 | if ((*q)->alternate_constraint(posd, failed_constraint)) | |
3244 | break; | |
3245 | } | |
3246 | } | |
3247 | ||
3248 | if (q == this->sections_elements_->end()) | |
3249 | gold_error(_("no matching section constraint")); | |
3250 | } | |
3251 | } | |
3252 | ||
2d924fd9 ILT |
3253 | // Force the alignment of the first TLS section to be the maximum |
3254 | // alignment of all TLS sections. | |
3255 | Output_section* first_tls = NULL; | |
3256 | uint64_t tls_align = 0; | |
3257 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3258 | p != this->sections_elements_->end(); | |
3259 | ++p) | |
3260 | { | |
ca09d69a | 3261 | Output_section* os = (*p)->get_output_section(); |
2d924fd9 ILT |
3262 | if (os != NULL && (os->flags() & elfcpp::SHF_TLS) != 0) |
3263 | { | |
3264 | if (first_tls == NULL) | |
3265 | first_tls = os; | |
3266 | if (os->addralign() > tls_align) | |
3267 | tls_align = os->addralign(); | |
3268 | } | |
3269 | } | |
3270 | if (first_tls != NULL) | |
3271 | first_tls->set_addralign(tls_align); | |
3272 | ||
77e65537 | 3273 | // For a relocatable link, we implicitly set dot to zero. |
a445fddf | 3274 | uint64_t dot_value = 0; |
f6973bdc | 3275 | uint64_t dot_alignment = 0; |
fd247bfe | 3276 | uint64_t load_address = 0; |
3c12dcdb DK |
3277 | |
3278 | // Check to see if we want to use any of -Ttext, -Tdata and -Tbss options | |
3279 | // to set section addresses. If the script has any SEGMENT_START | |
3280 | // expression, we do not set the section addresses. | |
3281 | bool use_tsection_options = | |
3282 | (!this->saw_segment_start_expression_ | |
3283 | && (parameters->options().user_set_Ttext() | |
3284 | || parameters->options().user_set_Tdata() | |
3285 | || parameters->options().user_set_Tbss())); | |
3286 | ||
a445fddf ILT |
3287 | for (Sections_elements::iterator p = this->sections_elements_->begin(); |
3288 | p != this->sections_elements_->end(); | |
3289 | ++p) | |
3c12dcdb DK |
3290 | { |
3291 | Output_section* os = (*p)->get_output_section(); | |
3292 | ||
3293 | // Handle -Ttext, -Tdata and -Tbss options. We do this by looking for | |
3294 | // the special sections by names and doing dot assignments. | |
3295 | if (use_tsection_options | |
3296 | && os != NULL | |
3297 | && (os->flags() & elfcpp::SHF_ALLOC) != 0) | |
3298 | { | |
3299 | uint64_t new_dot_value = dot_value; | |
3300 | ||
3301 | if (parameters->options().user_set_Ttext() | |
3302 | && strcmp(os->name(), ".text") == 0) | |
3303 | new_dot_value = parameters->options().Ttext(); | |
3304 | else if (parameters->options().user_set_Tdata() | |
3305 | && strcmp(os->name(), ".data") == 0) | |
3306 | new_dot_value = parameters->options().Tdata(); | |
3307 | else if (parameters->options().user_set_Tbss() | |
3308 | && strcmp(os->name(), ".bss") == 0) | |
3309 | new_dot_value = parameters->options().Tbss(); | |
3310 | ||
3311 | // Update dot and load address if necessary. | |
3312 | if (new_dot_value < dot_value) | |
3313 | gold_error(_("dot may not move backward")); | |
3314 | else if (new_dot_value != dot_value) | |
3315 | { | |
3316 | dot_value = new_dot_value; | |
3317 | load_address = new_dot_value; | |
3318 | } | |
3319 | } | |
3320 | ||
f6973bdc ILT |
3321 | (*p)->set_section_addresses(symtab, layout, &dot_value, &dot_alignment, |
3322 | &load_address); | |
3c12dcdb | 3323 | } |
a445fddf | 3324 | |
1c4f3631 ILT |
3325 | if (this->phdrs_elements_ != NULL) |
3326 | { | |
3327 | for (Phdrs_elements::iterator p = this->phdrs_elements_->begin(); | |
3328 | p != this->phdrs_elements_->end(); | |
3329 | ++p) | |
3330 | (*p)->eval_load_address(symtab, layout); | |
3331 | } | |
3332 | ||
f6973bdc | 3333 | return this->create_segments(layout, dot_alignment); |
a445fddf ILT |
3334 | } |
3335 | ||
3336 | // Sort the sections in order to put them into segments. | |
3337 | ||
3338 | class Sort_output_sections | |
3339 | { | |
3340 | public: | |
3341 | bool | |
3342 | operator()(const Output_section* os1, const Output_section* os2) const; | |
3343 | }; | |
3344 | ||
3345 | bool | |
3346 | Sort_output_sections::operator()(const Output_section* os1, | |
3347 | const Output_section* os2) const | |
3348 | { | |
3349 | // Sort first by the load address. | |
3350 | uint64_t lma1 = (os1->has_load_address() | |
3351 | ? os1->load_address() | |
3352 | : os1->address()); | |
3353 | uint64_t lma2 = (os2->has_load_address() | |
3354 | ? os2->load_address() | |
3355 | : os2->address()); | |
3356 | if (lma1 != lma2) | |
3357 | return lma1 < lma2; | |
3358 | ||
3359 | // Then sort by the virtual address. | |
3360 | if (os1->address() != os2->address()) | |
3361 | return os1->address() < os2->address(); | |
3362 | ||
3363 | // Sort TLS sections to the end. | |
3364 | bool tls1 = (os1->flags() & elfcpp::SHF_TLS) != 0; | |
3365 | bool tls2 = (os2->flags() & elfcpp::SHF_TLS) != 0; | |
3366 | if (tls1 != tls2) | |
3367 | return tls2; | |
3368 | ||
3369 | // Sort PROGBITS before NOBITS. | |
3370 | if (os1->type() == elfcpp::SHT_PROGBITS && os2->type() == elfcpp::SHT_NOBITS) | |
3371 | return true; | |
3372 | if (os1->type() == elfcpp::SHT_NOBITS && os2->type() == elfcpp::SHT_PROGBITS) | |
3373 | return false; | |
3374 | ||
1e5d2fb1 DK |
3375 | // Sort non-NOLOAD before NOLOAD. |
3376 | if (os1->is_noload() && !os2->is_noload()) | |
3377 | return true; | |
3378 | if (!os1->is_noload() && os2->is_noload()) | |
3379 | return true; | |
3380 | ||
a445fddf ILT |
3381 | // Otherwise we don't care. |
3382 | return false; | |
3383 | } | |
3384 | ||
3385 | // Return whether OS is a BSS section. This is a SHT_NOBITS section. | |
3386 | // We treat a section with the SHF_TLS flag set as taking up space | |
3387 | // even if it is SHT_NOBITS (this is true of .tbss), as we allocate | |
3388 | // space for them in the file. | |
3389 | ||
3390 | bool | |
3391 | Script_sections::is_bss_section(const Output_section* os) | |
3392 | { | |
3393 | return (os->type() == elfcpp::SHT_NOBITS | |
3394 | && (os->flags() & elfcpp::SHF_TLS) == 0); | |
3395 | } | |
3396 | ||
1c4f3631 ILT |
3397 | // Return the size taken by the file header and the program headers. |
3398 | ||
3399 | size_t | |
3400 | Script_sections::total_header_size(Layout* layout) const | |
3401 | { | |
3402 | size_t segment_count = layout->segment_count(); | |
3403 | size_t file_header_size; | |
3404 | size_t segment_headers_size; | |
8851ecca | 3405 | if (parameters->target().get_size() == 32) |
1c4f3631 ILT |
3406 | { |
3407 | file_header_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
3408 | segment_headers_size = segment_count * elfcpp::Elf_sizes<32>::phdr_size; | |
3409 | } | |
8851ecca | 3410 | else if (parameters->target().get_size() == 64) |
1c4f3631 ILT |
3411 | { |
3412 | file_header_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
3413 | segment_headers_size = segment_count * elfcpp::Elf_sizes<64>::phdr_size; | |
3414 | } | |
3415 | else | |
3416 | gold_unreachable(); | |
3417 | ||
3418 | return file_header_size + segment_headers_size; | |
3419 | } | |
3420 | ||
3421 | // Return the amount we have to subtract from the LMA to accomodate | |
3422 | // headers of the given size. The complication is that the file | |
3423 | // header have to be at the start of a page, as otherwise it will not | |
3424 | // be at the start of the file. | |
3425 | ||
3426 | uint64_t | |
3427 | Script_sections::header_size_adjustment(uint64_t lma, | |
3428 | size_t sizeof_headers) const | |
3429 | { | |
8851ecca | 3430 | const uint64_t abi_pagesize = parameters->target().abi_pagesize(); |
1c4f3631 ILT |
3431 | uint64_t hdr_lma = lma - sizeof_headers; |
3432 | hdr_lma &= ~(abi_pagesize - 1); | |
3433 | return lma - hdr_lma; | |
3434 | } | |
3435 | ||
a445fddf ILT |
3436 | // Create the PT_LOAD segments when using a SECTIONS clause. Returns |
3437 | // the segment which should hold the file header and segment headers, | |
3438 | // if any. | |
3439 | ||
3440 | Output_segment* | |
f6973bdc | 3441 | Script_sections::create_segments(Layout* layout, uint64_t dot_alignment) |
a445fddf ILT |
3442 | { |
3443 | gold_assert(this->saw_sections_clause_); | |
3444 | ||
8851ecca | 3445 | if (parameters->options().relocatable()) |
a445fddf ILT |
3446 | return NULL; |
3447 | ||
1c4f3631 | 3448 | if (this->saw_phdrs_clause()) |
f6973bdc | 3449 | return create_segments_from_phdrs_clause(layout, dot_alignment); |
1c4f3631 | 3450 | |
a445fddf ILT |
3451 | Layout::Section_list sections; |
3452 | layout->get_allocated_sections(§ions); | |
3453 | ||
3454 | // Sort the sections by address. | |
3455 | std::stable_sort(sections.begin(), sections.end(), Sort_output_sections()); | |
3456 | ||
3457 | this->create_note_and_tls_segments(layout, §ions); | |
3458 | ||
3459 | // Walk through the sections adding them to PT_LOAD segments. | |
8851ecca | 3460 | const uint64_t abi_pagesize = parameters->target().abi_pagesize(); |
a445fddf ILT |
3461 | Output_segment* first_seg = NULL; |
3462 | Output_segment* current_seg = NULL; | |
3463 | bool is_current_seg_readonly = true; | |
3464 | Layout::Section_list::iterator plast = sections.end(); | |
3465 | uint64_t last_vma = 0; | |
3466 | uint64_t last_lma = 0; | |
3467 | uint64_t last_size = 0; | |
3468 | for (Layout::Section_list::iterator p = sections.begin(); | |
3469 | p != sections.end(); | |
3470 | ++p) | |
3471 | { | |
3472 | const uint64_t vma = (*p)->address(); | |
3473 | const uint64_t lma = ((*p)->has_load_address() | |
3474 | ? (*p)->load_address() | |
3475 | : vma); | |
3476 | const uint64_t size = (*p)->current_data_size(); | |
3477 | ||
3478 | bool need_new_segment; | |
3479 | if (current_seg == NULL) | |
3480 | need_new_segment = true; | |
3481 | else if (lma - vma != last_lma - last_vma) | |
3482 | { | |
3483 | // This section has a different LMA relationship than the | |
3484 | // last one; we need a new segment. | |
3485 | need_new_segment = true; | |
3486 | } | |
3487 | else if (align_address(last_lma + last_size, abi_pagesize) | |
3488 | < align_address(lma, abi_pagesize)) | |
3489 | { | |
3490 | // Putting this section in the segment would require | |
3491 | // skipping a page. | |
3492 | need_new_segment = true; | |
3493 | } | |
3494 | else if (is_bss_section(*plast) && !is_bss_section(*p)) | |
3495 | { | |
3496 | // A non-BSS section can not follow a BSS section in the | |
3497 | // same segment. | |
3498 | need_new_segment = true; | |
3499 | } | |
3500 | else if (is_current_seg_readonly | |
af6156ef ILT |
3501 | && ((*p)->flags() & elfcpp::SHF_WRITE) != 0 |
3502 | && !parameters->options().omagic()) | |
a445fddf ILT |
3503 | { |
3504 | // Don't put a writable section in the same segment as a | |
3505 | // non-writable section. | |
3506 | need_new_segment = true; | |
3507 | } | |
3508 | else | |
3509 | { | |
3510 | // Otherwise, reuse the existing segment. | |
3511 | need_new_segment = false; | |
3512 | } | |
3513 | ||
3514 | elfcpp::Elf_Word seg_flags = | |
3515 | Layout::section_flags_to_segment((*p)->flags()); | |
3516 | ||
3517 | if (need_new_segment) | |
3518 | { | |
3519 | current_seg = layout->make_output_segment(elfcpp::PT_LOAD, | |
3520 | seg_flags); | |
3521 | current_seg->set_addresses(vma, lma); | |
f6973bdc | 3522 | current_seg->set_minimum_p_align(dot_alignment); |
a445fddf ILT |
3523 | if (first_seg == NULL) |
3524 | first_seg = current_seg; | |
3525 | is_current_seg_readonly = true; | |
3526 | } | |
3527 | ||
22f0da72 | 3528 | current_seg->add_output_section_to_load(layout, *p, seg_flags); |
a445fddf ILT |
3529 | |
3530 | if (((*p)->flags() & elfcpp::SHF_WRITE) != 0) | |
3531 | is_current_seg_readonly = false; | |
3532 | ||
3533 | plast = p; | |
3534 | last_vma = vma; | |
3535 | last_lma = lma; | |
3536 | last_size = size; | |
3537 | } | |
3538 | ||
3539 | // An ELF program should work even if the program headers are not in | |
3540 | // a PT_LOAD segment. However, it appears that the Linux kernel | |
3541 | // does not set the AT_PHDR auxiliary entry in that case. It sets | |
3542 | // the load address to p_vaddr - p_offset of the first PT_LOAD | |
3543 | // segment. It then sets AT_PHDR to the load address plus the | |
3544 | // offset to the program headers, e_phoff in the file header. This | |
3545 | // fails when the program headers appear in the file before the | |
3546 | // first PT_LOAD segment. Therefore, we always create a PT_LOAD | |
3547 | // segment to hold the file header and the program headers. This is | |
3548 | // effectively what the GNU linker does, and it is slightly more | |
3549 | // efficient in any case. We try to use the first PT_LOAD segment | |
3550 | // if we can, otherwise we make a new one. | |
3551 | ||
919ed24c ILT |
3552 | if (first_seg == NULL) |
3553 | return NULL; | |
3554 | ||
3ee173de ILT |
3555 | // -n or -N mean that the program is not demand paged and there is |
3556 | // no need to put the program headers in a PT_LOAD segment. | |
3557 | if (parameters->options().nmagic() || parameters->options().omagic()) | |
3558 | return NULL; | |
3559 | ||
1c4f3631 | 3560 | size_t sizeof_headers = this->total_header_size(layout); |
3802b2dd | 3561 | |
919ed24c ILT |
3562 | uint64_t vma = first_seg->vaddr(); |
3563 | uint64_t lma = first_seg->paddr(); | |
3564 | ||
3565 | uint64_t subtract = this->header_size_adjustment(lma, sizeof_headers); | |
3566 | ||
e6188289 ILT |
3567 | if ((lma & (abi_pagesize - 1)) >= sizeof_headers) |
3568 | { | |
3569 | first_seg->set_addresses(vma - subtract, lma - subtract); | |
3570 | return first_seg; | |
3571 | } | |
3572 | ||
919ed24c ILT |
3573 | // If there is no room to squeeze in the headers, then punt. The |
3574 | // resulting executable probably won't run on GNU/Linux, but we | |
3575 | // trust that the user knows what they are doing. | |
3576 | if (lma < subtract || vma < subtract) | |
3577 | return NULL; | |
3578 | ||
a445fddf ILT |
3579 | Output_segment* load_seg = layout->make_output_segment(elfcpp::PT_LOAD, |
3580 | elfcpp::PF_R); | |
919ed24c | 3581 | load_seg->set_addresses(vma - subtract, lma - subtract); |
a445fddf ILT |
3582 | |
3583 | return load_seg; | |
3584 | } | |
3585 | ||
3586 | // Create a PT_NOTE segment for each SHT_NOTE section and a PT_TLS | |
3587 | // segment if there are any SHT_TLS sections. | |
3588 | ||
3589 | void | |
3590 | Script_sections::create_note_and_tls_segments( | |
3591 | Layout* layout, | |
3592 | const Layout::Section_list* sections) | |
3593 | { | |
1c4f3631 ILT |
3594 | gold_assert(!this->saw_phdrs_clause()); |
3595 | ||
a445fddf ILT |
3596 | bool saw_tls = false; |
3597 | for (Layout::Section_list::const_iterator p = sections->begin(); | |
3598 | p != sections->end(); | |
3599 | ++p) | |
3600 | { | |
3601 | if ((*p)->type() == elfcpp::SHT_NOTE) | |
3602 | { | |
3603 | elfcpp::Elf_Word seg_flags = | |
3604 | Layout::section_flags_to_segment((*p)->flags()); | |
3605 | Output_segment* oseg = layout->make_output_segment(elfcpp::PT_NOTE, | |
3606 | seg_flags); | |
22f0da72 | 3607 | oseg->add_output_section_to_nonload(*p, seg_flags); |
a445fddf ILT |
3608 | |
3609 | // Incorporate any subsequent SHT_NOTE sections, in the | |
3610 | // hopes that the script is sensible. | |
3611 | Layout::Section_list::const_iterator pnext = p + 1; | |
3612 | while (pnext != sections->end() | |
3613 | && (*pnext)->type() == elfcpp::SHT_NOTE) | |
3614 | { | |
3615 | seg_flags = Layout::section_flags_to_segment((*pnext)->flags()); | |
22f0da72 | 3616 | oseg->add_output_section_to_nonload(*pnext, seg_flags); |
a445fddf ILT |
3617 | p = pnext; |
3618 | ++pnext; | |
3619 | } | |
3620 | } | |
3621 | ||
3622 | if (((*p)->flags() & elfcpp::SHF_TLS) != 0) | |
3623 | { | |
3624 | if (saw_tls) | |
3625 | gold_error(_("TLS sections are not adjacent")); | |
3626 | ||
3627 | elfcpp::Elf_Word seg_flags = | |
3628 | Layout::section_flags_to_segment((*p)->flags()); | |
3629 | Output_segment* oseg = layout->make_output_segment(elfcpp::PT_TLS, | |
3630 | seg_flags); | |
22f0da72 | 3631 | oseg->add_output_section_to_nonload(*p, seg_flags); |
a445fddf ILT |
3632 | |
3633 | Layout::Section_list::const_iterator pnext = p + 1; | |
3634 | while (pnext != sections->end() | |
3635 | && ((*pnext)->flags() & elfcpp::SHF_TLS) != 0) | |
3636 | { | |
3637 | seg_flags = Layout::section_flags_to_segment((*pnext)->flags()); | |
22f0da72 | 3638 | oseg->add_output_section_to_nonload(*pnext, seg_flags); |
a445fddf ILT |
3639 | p = pnext; |
3640 | ++pnext; | |
3641 | } | |
3642 | ||
3643 | saw_tls = true; | |
3644 | } | |
3645 | } | |
3646 | } | |
3647 | ||
1c4f3631 ILT |
3648 | // Add a program header. The PHDRS clause is syntactically distinct |
3649 | // from the SECTIONS clause, but we implement it with the SECTIONS | |
55458500 | 3650 | // support because PHDRS is useless if there is no SECTIONS clause. |
1c4f3631 ILT |
3651 | |
3652 | void | |
3653 | Script_sections::add_phdr(const char* name, size_t namelen, unsigned int type, | |
3654 | bool includes_filehdr, bool includes_phdrs, | |
3655 | bool is_flags_valid, unsigned int flags, | |
3656 | Expression* load_address) | |
3657 | { | |
3658 | if (this->phdrs_elements_ == NULL) | |
3659 | this->phdrs_elements_ = new Phdrs_elements(); | |
3660 | this->phdrs_elements_->push_back(new Phdrs_element(name, namelen, type, | |
3661 | includes_filehdr, | |
3662 | includes_phdrs, | |
3663 | is_flags_valid, flags, | |
3664 | load_address)); | |
3665 | } | |
3666 | ||
3802b2dd ILT |
3667 | // Return the number of segments we expect to create based on the |
3668 | // SECTIONS clause. This is used to implement SIZEOF_HEADERS. | |
3669 | ||
3670 | size_t | |
3671 | Script_sections::expected_segment_count(const Layout* layout) const | |
3672 | { | |
1c4f3631 ILT |
3673 | if (this->saw_phdrs_clause()) |
3674 | return this->phdrs_elements_->size(); | |
3675 | ||
3802b2dd ILT |
3676 | Layout::Section_list sections; |
3677 | layout->get_allocated_sections(§ions); | |
3678 | ||
3679 | // We assume that we will need two PT_LOAD segments. | |
3680 | size_t ret = 2; | |
3681 | ||
3682 | bool saw_note = false; | |
3683 | bool saw_tls = false; | |
3684 | for (Layout::Section_list::const_iterator p = sections.begin(); | |
3685 | p != sections.end(); | |
3686 | ++p) | |
3687 | { | |
3688 | if ((*p)->type() == elfcpp::SHT_NOTE) | |
3689 | { | |
3690 | // Assume that all note sections will fit into a single | |
3691 | // PT_NOTE segment. | |
3692 | if (!saw_note) | |
3693 | { | |
3694 | ++ret; | |
3695 | saw_note = true; | |
3696 | } | |
3697 | } | |
3698 | else if (((*p)->flags() & elfcpp::SHF_TLS) != 0) | |
3699 | { | |
3700 | // There can only be one PT_TLS segment. | |
3701 | if (!saw_tls) | |
3702 | { | |
3703 | ++ret; | |
3704 | saw_tls = true; | |
3705 | } | |
3706 | } | |
3707 | } | |
3708 | ||
3709 | return ret; | |
3710 | } | |
3711 | ||
1c4f3631 ILT |
3712 | // Create the segments from a PHDRS clause. Return the segment which |
3713 | // should hold the file header and program headers, if any. | |
3714 | ||
3715 | Output_segment* | |
f6973bdc ILT |
3716 | Script_sections::create_segments_from_phdrs_clause(Layout* layout, |
3717 | uint64_t dot_alignment) | |
1c4f3631 ILT |
3718 | { |
3719 | this->attach_sections_using_phdrs_clause(layout); | |
f6973bdc | 3720 | return this->set_phdrs_clause_addresses(layout, dot_alignment); |
1c4f3631 ILT |
3721 | } |
3722 | ||
3723 | // Create the segments from the PHDRS clause, and put the output | |
3724 | // sections in them. | |
3725 | ||
3726 | void | |
3727 | Script_sections::attach_sections_using_phdrs_clause(Layout* layout) | |
3728 | { | |
3729 | typedef std::map<std::string, Output_segment*> Name_to_segment; | |
3730 | Name_to_segment name_to_segment; | |
3731 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
3732 | p != this->phdrs_elements_->end(); | |
3733 | ++p) | |
3734 | name_to_segment[(*p)->name()] = (*p)->create_segment(layout); | |
3735 | ||
3736 | // Walk through the output sections and attach them to segments. | |
3737 | // Output sections in the script which do not list segments are | |
3738 | // attached to the same set of segments as the immediately preceding | |
3739 | // output section. | |
20e6d0d6 | 3740 | |
1c4f3631 | 3741 | String_list* phdr_names = NULL; |
20e6d0d6 | 3742 | bool load_segments_only = false; |
1c4f3631 ILT |
3743 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); |
3744 | p != this->sections_elements_->end(); | |
3745 | ++p) | |
3746 | { | |
2cefc357 | 3747 | bool orphan; |
20e6d0d6 | 3748 | String_list* old_phdr_names = phdr_names; |
2cefc357 | 3749 | Output_section* os = (*p)->allocate_to_segment(&phdr_names, &orphan); |
1c4f3631 ILT |
3750 | if (os == NULL) |
3751 | continue; | |
3752 | ||
3753 | if (phdr_names == NULL) | |
3754 | { | |
3755 | gold_error(_("allocated section not in any segment")); | |
3756 | continue; | |
3757 | } | |
3758 | ||
20e6d0d6 DK |
3759 | // We see a list of segments names. Disable PT_LOAD segment only |
3760 | // filtering. | |
3761 | if (old_phdr_names != phdr_names) | |
3762 | load_segments_only = false; | |
3763 | ||
2cefc357 ILT |
3764 | // If this is an orphan section--one that was not explicitly |
3765 | // mentioned in the linker script--then it should not inherit | |
3766 | // any segment type other than PT_LOAD. Otherwise, e.g., the | |
3767 | // PT_INTERP segment will pick up following orphan sections, | |
3768 | // which does not make sense. If this is not an orphan section, | |
3769 | // we trust the linker script. | |
3770 | if (orphan) | |
3771 | { | |
20e6d0d6 DK |
3772 | // Enable PT_LOAD segments only filtering until we see another |
3773 | // list of segment names. | |
3774 | load_segments_only = true; | |
2cefc357 ILT |
3775 | } |
3776 | ||
1c4f3631 ILT |
3777 | bool in_load_segment = false; |
3778 | for (String_list::const_iterator q = phdr_names->begin(); | |
3779 | q != phdr_names->end(); | |
3780 | ++q) | |
3781 | { | |
3782 | Name_to_segment::const_iterator r = name_to_segment.find(*q); | |
3783 | if (r == name_to_segment.end()) | |
3784 | gold_error(_("no segment %s"), q->c_str()); | |
3785 | else | |
3786 | { | |
20e6d0d6 DK |
3787 | if (load_segments_only |
3788 | && r->second->type() != elfcpp::PT_LOAD) | |
3789 | continue; | |
3790 | ||
1c4f3631 ILT |
3791 | elfcpp::Elf_Word seg_flags = |
3792 | Layout::section_flags_to_segment(os->flags()); | |
1c4f3631 | 3793 | |
22f0da72 ILT |
3794 | if (r->second->type() != elfcpp::PT_LOAD) |
3795 | r->second->add_output_section_to_nonload(os, seg_flags); | |
3796 | else | |
1c4f3631 | 3797 | { |
22f0da72 | 3798 | r->second->add_output_section_to_load(layout, os, seg_flags); |
1c4f3631 ILT |
3799 | if (in_load_segment) |
3800 | gold_error(_("section in two PT_LOAD segments")); | |
3801 | in_load_segment = true; | |
3802 | } | |
3803 | } | |
3804 | } | |
3805 | ||
3806 | if (!in_load_segment) | |
3807 | gold_error(_("allocated section not in any PT_LOAD segment")); | |
3808 | } | |
3809 | } | |
3810 | ||
3811 | // Set the addresses for segments created from a PHDRS clause. Return | |
3812 | // the segment which should hold the file header and program headers, | |
3813 | // if any. | |
3814 | ||
3815 | Output_segment* | |
f6973bdc ILT |
3816 | Script_sections::set_phdrs_clause_addresses(Layout* layout, |
3817 | uint64_t dot_alignment) | |
1c4f3631 ILT |
3818 | { |
3819 | Output_segment* load_seg = NULL; | |
3820 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
3821 | p != this->phdrs_elements_->end(); | |
3822 | ++p) | |
3823 | { | |
3824 | // Note that we have to set the flags after adding the output | |
3825 | // sections to the segment, as adding an output segment can | |
3826 | // change the flags. | |
3827 | (*p)->set_flags_if_valid(); | |
3828 | ||
3829 | Output_segment* oseg = (*p)->segment(); | |
3830 | ||
3831 | if (oseg->type() != elfcpp::PT_LOAD) | |
3832 | { | |
3833 | // The addresses of non-PT_LOAD segments are set from the | |
3834 | // PT_LOAD segments. | |
3835 | if ((*p)->has_load_address()) | |
3836 | gold_error(_("may only specify load address for PT_LOAD segment")); | |
3837 | continue; | |
3838 | } | |
3839 | ||
f6973bdc ILT |
3840 | oseg->set_minimum_p_align(dot_alignment); |
3841 | ||
1c4f3631 ILT |
3842 | // The output sections should have addresses from the SECTIONS |
3843 | // clause. The addresses don't have to be in order, so find the | |
3844 | // one with the lowest load address. Use that to set the | |
3845 | // address of the segment. | |
3846 | ||
3847 | Output_section* osec = oseg->section_with_lowest_load_address(); | |
3848 | if (osec == NULL) | |
3849 | { | |
3850 | oseg->set_addresses(0, 0); | |
3851 | continue; | |
3852 | } | |
3853 | ||
3854 | uint64_t vma = osec->address(); | |
3855 | uint64_t lma = osec->has_load_address() ? osec->load_address() : vma; | |
3856 | ||
3857 | // Override the load address of the section with the load | |
3858 | // address specified for the segment. | |
3859 | if ((*p)->has_load_address()) | |
3860 | { | |
3861 | if (osec->has_load_address()) | |
3862 | gold_warning(_("PHDRS load address overrides " | |
3863 | "section %s load address"), | |
3864 | osec->name()); | |
3865 | ||
3866 | lma = (*p)->load_address(); | |
3867 | } | |
3868 | ||
3869 | bool headers = (*p)->includes_filehdr() && (*p)->includes_phdrs(); | |
3870 | if (!headers && ((*p)->includes_filehdr() || (*p)->includes_phdrs())) | |
3871 | { | |
3872 | // We could support this if we wanted to. | |
3873 | gold_error(_("using only one of FILEHDR and PHDRS is " | |
3874 | "not currently supported")); | |
3875 | } | |
3876 | if (headers) | |
3877 | { | |
3878 | size_t sizeof_headers = this->total_header_size(layout); | |
3879 | uint64_t subtract = this->header_size_adjustment(lma, | |
3880 | sizeof_headers); | |
3881 | if (lma >= subtract && vma >= subtract) | |
3882 | { | |
3883 | lma -= subtract; | |
3884 | vma -= subtract; | |
3885 | } | |
3886 | else | |
3887 | { | |
3888 | gold_error(_("sections loaded on first page without room " | |
3889 | "for file and program headers " | |
3890 | "are not supported")); | |
3891 | } | |
3892 | ||
3893 | if (load_seg != NULL) | |
3894 | gold_error(_("using FILEHDR and PHDRS on more than one " | |
3895 | "PT_LOAD segment is not currently supported")); | |
3896 | load_seg = oseg; | |
3897 | } | |
3898 | ||
3899 | oseg->set_addresses(vma, lma); | |
3900 | } | |
3901 | ||
3902 | return load_seg; | |
3903 | } | |
3904 | ||
3905 | // Add the file header and segment headers to non-load segments | |
3906 | // specified in the PHDRS clause. | |
3907 | ||
3908 | void | |
3909 | Script_sections::put_headers_in_phdrs(Output_data* file_header, | |
3910 | Output_data* segment_headers) | |
3911 | { | |
3912 | gold_assert(this->saw_phdrs_clause()); | |
3913 | for (Phdrs_elements::iterator p = this->phdrs_elements_->begin(); | |
3914 | p != this->phdrs_elements_->end(); | |
3915 | ++p) | |
3916 | { | |
3917 | if ((*p)->type() != elfcpp::PT_LOAD) | |
3918 | { | |
3919 | if ((*p)->includes_phdrs()) | |
3920 | (*p)->segment()->add_initial_output_data(segment_headers); | |
3921 | if ((*p)->includes_filehdr()) | |
3922 | (*p)->segment()->add_initial_output_data(file_header); | |
3923 | } | |
3924 | } | |
3925 | } | |
3926 | ||
8f2eb564 ILT |
3927 | // Look for an output section by name and return the address, the load |
3928 | // address, the alignment, and the size. This is used when an | |
3929 | // expression refers to an output section which was not actually | |
3930 | // created. This returns true if the section was found, false | |
3931 | // otherwise. | |
3932 | ||
3933 | bool | |
3934 | Script_sections::get_output_section_info(const char* name, uint64_t* address, | |
3935 | uint64_t* load_address, | |
2ea97941 | 3936 | uint64_t* addralign, |
8f2eb564 ILT |
3937 | uint64_t* size) const |
3938 | { | |
3939 | if (!this->saw_sections_clause_) | |
3940 | return false; | |
3941 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3942 | p != this->sections_elements_->end(); | |
3943 | ++p) | |
2ea97941 | 3944 | if ((*p)->get_output_section_info(name, address, load_address, addralign, |
8f2eb564 ILT |
3945 | size)) |
3946 | return true; | |
3947 | return false; | |
3948 | } | |
3949 | ||
20e6d0d6 DK |
3950 | // Release all Output_segments. This remove all pointers to all |
3951 | // Output_segments. | |
3952 | ||
3953 | void | |
3954 | Script_sections::release_segments() | |
3955 | { | |
3956 | if (this->saw_phdrs_clause()) | |
3957 | { | |
3958 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
3959 | p != this->phdrs_elements_->end(); | |
3960 | ++p) | |
3961 | (*p)->release_segment(); | |
3962 | } | |
3963 | } | |
3964 | ||
494e05f4 ILT |
3965 | // Print the SECTIONS clause to F for debugging. |
3966 | ||
3967 | void | |
3968 | Script_sections::print(FILE* f) const | |
3969 | { | |
7f8cd844 NC |
3970 | if (this->phdrs_elements_ != NULL) |
3971 | { | |
3972 | fprintf(f, "PHDRS {\n"); | |
3973 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
3974 | p != this->phdrs_elements_->end(); | |
3975 | ++p) | |
3976 | (*p)->print(f); | |
3977 | fprintf(f, "}\n"); | |
3978 | } | |
3979 | ||
3980 | if (this->memory_regions_ != NULL) | |
3981 | { | |
3982 | fprintf(f, "MEMORY {\n"); | |
3983 | for (Memory_regions::const_iterator m = this->memory_regions_->begin(); | |
3984 | m != this->memory_regions_->end(); | |
3985 | ++m) | |
3986 | (*m)->print(f); | |
3987 | fprintf(f, "}\n"); | |
3988 | } | |
3989 | ||
494e05f4 ILT |
3990 | if (!this->saw_sections_clause_) |
3991 | return; | |
3992 | ||
3993 | fprintf(f, "SECTIONS {\n"); | |
3994 | ||
3995 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3996 | p != this->sections_elements_->end(); | |
3997 | ++p) | |
3998 | (*p)->print(f); | |
3999 | ||
4000 | fprintf(f, "}\n"); | |
4001 | } | |
4002 | ||
4003 | } // End namespace gold. |