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494e05f4 ILT |
1 | // script-sections.cc -- linker script SECTIONS for gold |
2 | ||
b3adc24a | 3 | // Copyright (C) 2008-2020 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), | |
ea5cae92 | 56 | current_offset_(0), |
4ef28648 | 57 | vma_sections_(), |
ea5cae92 NC |
58 | lma_sections_(), |
59 | last_section_(NULL) | |
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* | |
ea5cae92 | 90 | get_current_address() const |
7f8cd844 NC |
91 | { |
92 | return | |
93 | script_exp_binary_add(this->start_, | |
ea5cae92 | 94 | script_exp_integer(this->current_offset_)); |
7f8cd844 | 95 | } |
7c61d651 CC |
96 | |
97 | void | |
98 | set_address(uint64_t addr, const Symbol_table* symtab, const Layout* layout) | |
99 | { | |
100 | uint64_t start = this->start_->eval(symtab, layout, false); | |
101 | uint64_t len = this->length_->eval(symtab, layout, false); | |
102 | if (addr < start || addr >= start + len) | |
103 | gold_error(_("address 0x%llx is not within region %s"), | |
104 | static_cast<unsigned long long>(addr), | |
105 | this->name_.c_str()); | |
106 | else if (addr < start + this->current_offset_) | |
107 | gold_error(_("address 0x%llx moves dot backwards in region %s"), | |
108 | static_cast<unsigned long long>(addr), | |
109 | this->name_.c_str()); | |
110 | this->current_offset_ = addr - start; | |
111 | } | |
112 | ||
7f8cd844 | 113 | void |
ea5cae92 NC |
114 | increment_offset(std::string section_name, uint64_t amount, |
115 | const Symbol_table* symtab, const Layout* layout) | |
7f8cd844 | 116 | { |
ea5cae92 | 117 | this->current_offset_ += amount; |
7f8cd844 | 118 | |
ea5cae92 | 119 | if (this->current_offset_ |
7f8cd844 | 120 | > this->length_->eval(symtab, layout, false)) |
ea5cae92 NC |
121 | gold_error(_("section %s overflows end of region %s"), |
122 | section_name.c_str(), this->name_.c_str()); | |
7f8cd844 | 123 | } |
7c61d651 | 124 | |
ea5cae92 NC |
125 | // Returns true iff there is room left in this region |
126 | // for AMOUNT more bytes of data. | |
127 | bool | |
128 | has_room_for(const Symbol_table* symtab, const Layout* layout, | |
129 | uint64_t amount) const | |
7f8cd844 | 130 | { |
ea5cae92 NC |
131 | return (this->current_offset_ + amount |
132 | < this->length_->eval(symtab, layout, false)); | |
7f8cd844 NC |
133 | } |
134 | ||
ea5cae92 NC |
135 | // Return true if the provided section flags |
136 | // are compatible with this region's attributes. | |
137 | bool | |
138 | attributes_compatible(elfcpp::Elf_Xword flags, elfcpp::Elf_Xword type) const; | |
7c61d651 | 139 | |
7f8cd844 NC |
140 | void |
141 | add_section(Output_section_definition* sec, bool vma) | |
142 | { | |
143 | if (vma) | |
144 | this->vma_sections_.push_back(sec); | |
145 | else | |
146 | this->lma_sections_.push_back(sec); | |
147 | } | |
148 | ||
149 | typedef std::vector<Output_section_definition*> Section_list; | |
150 | ||
151 | // Return the start of the list of sections | |
152 | // whose VMAs are taken from this region. | |
153 | Section_list::const_iterator | |
ea5cae92 | 154 | get_vma_section_list_start() const |
7f8cd844 NC |
155 | { return this->vma_sections_.begin(); } |
156 | ||
157 | // Return the start of the list of sections | |
158 | // whose LMAs are taken from this region. | |
159 | Section_list::const_iterator | |
ea5cae92 | 160 | get_lma_section_list_start() const |
7f8cd844 NC |
161 | { return this->lma_sections_.begin(); } |
162 | ||
163 | // Return the end of the list of sections | |
164 | // whose VMAs are taken from this region. | |
165 | Section_list::const_iterator | |
ea5cae92 | 166 | get_vma_section_list_end() const |
7f8cd844 NC |
167 | { return this->vma_sections_.end(); } |
168 | ||
169 | // Return the end of the list of sections | |
170 | // whose LMAs are taken from this region. | |
171 | Section_list::const_iterator | |
ea5cae92 | 172 | get_lma_section_list_end() const |
7f8cd844 NC |
173 | { return this->lma_sections_.end(); } |
174 | ||
ea5cae92 NC |
175 | Output_section_definition* |
176 | get_last_section() const | |
177 | { return this->last_section_; } | |
178 | ||
179 | void | |
180 | set_last_section(Output_section_definition* sec) | |
181 | { this->last_section_ = sec; } | |
182 | ||
7f8cd844 NC |
183 | private: |
184 | ||
185 | std::string name_; | |
186 | unsigned int attributes_; | |
187 | Expression* start_; | |
188 | Expression* length_; | |
ea5cae92 NC |
189 | // The offset to the next free byte in the region. |
190 | // Note - for compatibility with GNU LD we only maintain one offset | |
191 | // regardless of whether the region is being used for VMA values, | |
192 | // LMA values, or both. | |
193 | uint64_t current_offset_; | |
7f8cd844 NC |
194 | // A list of sections whose VMAs are set inside this region. |
195 | Section_list vma_sections_; | |
196 | // A list of sections whose LMAs are set inside this region. | |
197 | Section_list lma_sections_; | |
ea5cae92 NC |
198 | // The latest section to make use of this region. |
199 | Output_section_definition* last_section_; | |
7f8cd844 NC |
200 | }; |
201 | ||
ea5cae92 NC |
202 | // Return true if the provided section flags |
203 | // are compatible with this region's attributes. | |
204 | ||
205 | bool | |
206 | Memory_region::attributes_compatible(elfcpp::Elf_Xword flags, | |
207 | elfcpp::Elf_Xword type) const | |
208 | { | |
209 | unsigned int attrs = this->attributes_; | |
210 | ||
211 | // No attributes means that this region is not compatible with anything. | |
212 | if (attrs == 0) | |
213 | return false; | |
214 | ||
215 | bool match = true; | |
216 | do | |
217 | { | |
218 | switch (attrs & - attrs) | |
219 | { | |
220 | case MEM_EXECUTABLE: | |
221 | if ((flags & elfcpp::SHF_EXECINSTR) == 0) | |
222 | match = false; | |
223 | break; | |
224 | ||
225 | case MEM_WRITEABLE: | |
226 | if ((flags & elfcpp::SHF_WRITE) == 0) | |
227 | match = false; | |
228 | break; | |
229 | ||
230 | case MEM_READABLE: | |
231 | // All sections are presumed readable. | |
232 | break; | |
233 | ||
234 | case MEM_ALLOCATABLE: | |
235 | if ((flags & elfcpp::SHF_ALLOC) == 0) | |
236 | match = false; | |
237 | break; | |
238 | ||
239 | case MEM_INITIALIZED: | |
240 | if ((type & elfcpp::SHT_NOBITS) != 0) | |
241 | match = false; | |
242 | break; | |
243 | } | |
244 | attrs &= ~ (attrs & - attrs); | |
245 | } | |
246 | while (attrs != 0); | |
3785f51a | 247 | |
ea5cae92 NC |
248 | return match; |
249 | } | |
3785f51a | 250 | |
7f8cd844 NC |
251 | // Print a memory region. |
252 | ||
253 | void | |
254 | Memory_region::print(FILE* f) const | |
255 | { | |
256 | fprintf(f, " %s", this->name_.c_str()); | |
257 | ||
258 | unsigned int attrs = this->attributes_; | |
259 | if (attrs != 0) | |
260 | { | |
261 | fprintf(f, " ("); | |
262 | do | |
263 | { | |
264 | switch (attrs & - attrs) | |
265 | { | |
266 | case MEM_EXECUTABLE: fputc('x', f); break; | |
267 | case MEM_WRITEABLE: fputc('w', f); break; | |
268 | case MEM_READABLE: fputc('r', f); break; | |
269 | case MEM_ALLOCATABLE: fputc('a', f); break; | |
270 | case MEM_INITIALIZED: fputc('i', f); break; | |
271 | default: | |
272 | gold_unreachable(); | |
273 | } | |
274 | attrs &= ~ (attrs & - attrs); | |
275 | } | |
276 | while (attrs != 0); | |
277 | fputc(')', f); | |
278 | } | |
279 | ||
280 | fprintf(f, " : origin = "); | |
281 | this->start_->print(f); | |
282 | fprintf(f, ", length = "); | |
283 | this->length_->print(f); | |
284 | fprintf(f, "\n"); | |
285 | } | |
286 | ||
0d371ad3 ILT |
287 | // Manage orphan sections. This is intended to be largely compatible |
288 | // with the GNU linker. The Linux kernel implicitly relies on | |
289 | // something similar to the GNU linker's orphan placement. We | |
290 | // originally used a simpler scheme here, but it caused the kernel | |
291 | // build to fail, and was also rather inefficient. | |
292 | ||
293 | class Orphan_section_placement | |
294 | { | |
295 | private: | |
296 | typedef Script_sections::Elements_iterator Elements_iterator; | |
297 | ||
298 | public: | |
299 | Orphan_section_placement(); | |
300 | ||
301 | // Handle an output section during initialization of this mapping. | |
302 | void | |
303 | output_section_init(const std::string& name, Output_section*, | |
304 | Elements_iterator location); | |
305 | ||
306 | // Initialize the last location. | |
307 | void | |
308 | last_init(Elements_iterator location); | |
309 | ||
310 | // Set *PWHERE to the address of an iterator pointing to the | |
311 | // location to use for an orphan section. Return true if the | |
312 | // iterator has a value, false otherwise. | |
313 | bool | |
314 | find_place(Output_section*, Elements_iterator** pwhere); | |
315 | ||
d81222d3 CC |
316 | // Update PLACE_LAST_ALLOC. |
317 | void | |
318 | update_last_alloc(Elements_iterator where); | |
319 | ||
0d371ad3 ILT |
320 | // Return the iterator being used for sections at the very end of |
321 | // the linker script. | |
322 | Elements_iterator | |
323 | last_place() const; | |
324 | ||
325 | private: | |
326 | // The places that we specifically recognize. This list is copied | |
327 | // from the GNU linker. | |
328 | enum Place_index | |
329 | { | |
330 | PLACE_TEXT, | |
331 | PLACE_RODATA, | |
332 | PLACE_DATA, | |
6c93b22c ILT |
333 | PLACE_TLS, |
334 | PLACE_TLS_BSS, | |
0d371ad3 | 335 | PLACE_BSS, |
5d9f66cb | 336 | PLACE_LAST_ALLOC, |
0d371ad3 ILT |
337 | PLACE_REL, |
338 | PLACE_INTERP, | |
339 | PLACE_NONALLOC, | |
340 | PLACE_LAST, | |
341 | PLACE_MAX | |
342 | }; | |
343 | ||
344 | // The information we keep for a specific place. | |
345 | struct Place | |
346 | { | |
347 | // The name of sections for this place. | |
348 | const char* name; | |
349 | // Whether we have a location for this place. | |
350 | bool have_location; | |
351 | // The iterator for this place. | |
352 | Elements_iterator location; | |
353 | }; | |
354 | ||
355 | // Initialize one place element. | |
356 | void | |
357 | initialize_place(Place_index, const char*); | |
358 | ||
359 | // The places. | |
360 | Place places_[PLACE_MAX]; | |
361 | // True if this is the first call to output_section_init. | |
362 | bool first_init_; | |
363 | }; | |
364 | ||
365 | // Initialize Orphan_section_placement. | |
366 | ||
367 | Orphan_section_placement::Orphan_section_placement() | |
368 | : first_init_(true) | |
369 | { | |
370 | this->initialize_place(PLACE_TEXT, ".text"); | |
371 | this->initialize_place(PLACE_RODATA, ".rodata"); | |
372 | this->initialize_place(PLACE_DATA, ".data"); | |
6c93b22c ILT |
373 | this->initialize_place(PLACE_TLS, NULL); |
374 | this->initialize_place(PLACE_TLS_BSS, NULL); | |
0d371ad3 | 375 | this->initialize_place(PLACE_BSS, ".bss"); |
5d9f66cb | 376 | this->initialize_place(PLACE_LAST_ALLOC, NULL); |
0d371ad3 ILT |
377 | this->initialize_place(PLACE_REL, NULL); |
378 | this->initialize_place(PLACE_INTERP, ".interp"); | |
379 | this->initialize_place(PLACE_NONALLOC, NULL); | |
380 | this->initialize_place(PLACE_LAST, NULL); | |
381 | } | |
382 | ||
383 | // Initialize one place element. | |
384 | ||
385 | void | |
386 | Orphan_section_placement::initialize_place(Place_index index, const char* name) | |
387 | { | |
388 | this->places_[index].name = name; | |
389 | this->places_[index].have_location = false; | |
390 | } | |
391 | ||
392 | // While initializing the Orphan_section_placement information, this | |
393 | // is called once for each output section named in the linker script. | |
394 | // If we found an output section during the link, it will be passed in | |
395 | // OS. | |
396 | ||
397 | void | |
398 | Orphan_section_placement::output_section_init(const std::string& name, | |
399 | Output_section* os, | |
400 | Elements_iterator location) | |
401 | { | |
402 | bool first_init = this->first_init_; | |
403 | this->first_init_ = false; | |
404 | ||
5d9f66cb CC |
405 | // Remember the last allocated section. Any orphan bss sections |
406 | // will be placed after it. | |
407 | if (os != NULL | |
408 | && (os->flags() & elfcpp::SHF_ALLOC) != 0) | |
409 | { | |
410 | this->places_[PLACE_LAST_ALLOC].location = location; | |
411 | this->places_[PLACE_LAST_ALLOC].have_location = true; | |
412 | } | |
413 | ||
0d371ad3 ILT |
414 | for (int i = 0; i < PLACE_MAX; ++i) |
415 | { | |
416 | if (this->places_[i].name != NULL && this->places_[i].name == name) | |
417 | { | |
418 | if (this->places_[i].have_location) | |
419 | { | |
420 | // We have already seen a section with this name. | |
421 | return; | |
422 | } | |
423 | ||
424 | this->places_[i].location = location; | |
425 | this->places_[i].have_location = true; | |
426 | ||
427 | // If we just found the .bss section, restart the search for | |
428 | // an unallocated section. This follows the GNU linker's | |
429 | // behaviour. | |
430 | if (i == PLACE_BSS) | |
431 | this->places_[PLACE_NONALLOC].have_location = false; | |
432 | ||
433 | return; | |
434 | } | |
435 | } | |
436 | ||
437 | // Relocation sections. | |
438 | if (!this->places_[PLACE_REL].have_location | |
439 | && os != NULL | |
440 | && (os->type() == elfcpp::SHT_REL || os->type() == elfcpp::SHT_RELA) | |
441 | && (os->flags() & elfcpp::SHF_ALLOC) != 0) | |
442 | { | |
443 | this->places_[PLACE_REL].location = location; | |
444 | this->places_[PLACE_REL].have_location = true; | |
445 | } | |
446 | ||
447 | // We find the location for unallocated sections by finding the | |
448 | // first debugging or comment section after the BSS section (if | |
449 | // there is one). | |
450 | if (!this->places_[PLACE_NONALLOC].have_location | |
451 | && (name == ".comment" || Layout::is_debug_info_section(name.c_str()))) | |
452 | { | |
453 | // We add orphan sections after the location in PLACES_. We | |
454 | // want to store unallocated sections before LOCATION. If this | |
455 | // is the very first section, we can't use it. | |
456 | if (!first_init) | |
457 | { | |
458 | --location; | |
459 | this->places_[PLACE_NONALLOC].location = location; | |
460 | this->places_[PLACE_NONALLOC].have_location = true; | |
461 | } | |
462 | } | |
463 | } | |
464 | ||
465 | // Initialize the last location. | |
466 | ||
467 | void | |
468 | Orphan_section_placement::last_init(Elements_iterator location) | |
469 | { | |
470 | this->places_[PLACE_LAST].location = location; | |
471 | this->places_[PLACE_LAST].have_location = true; | |
472 | } | |
473 | ||
474 | // Set *PWHERE to the address of an iterator pointing to the location | |
475 | // to use for an orphan section. Return true if the iterator has a | |
476 | // value, false otherwise. | |
477 | ||
478 | bool | |
479 | Orphan_section_placement::find_place(Output_section* os, | |
480 | Elements_iterator** pwhere) | |
481 | { | |
482 | // Figure out where OS should go. This is based on the GNU linker | |
483 | // code. FIXME: The GNU linker handles small data sections | |
484 | // specially, but we don't. | |
485 | elfcpp::Elf_Word type = os->type(); | |
486 | elfcpp::Elf_Xword flags = os->flags(); | |
487 | Place_index index; | |
488 | if ((flags & elfcpp::SHF_ALLOC) == 0 | |
489 | && !Layout::is_debug_info_section(os->name())) | |
490 | index = PLACE_NONALLOC; | |
491 | else if ((flags & elfcpp::SHF_ALLOC) == 0) | |
492 | index = PLACE_LAST; | |
493 | else if (type == elfcpp::SHT_NOTE) | |
494 | index = PLACE_INTERP; | |
6c93b22c ILT |
495 | else if ((flags & elfcpp::SHF_TLS) != 0) |
496 | { | |
497 | if (type == elfcpp::SHT_NOBITS) | |
498 | index = PLACE_TLS_BSS; | |
499 | else | |
500 | index = PLACE_TLS; | |
501 | } | |
0d371ad3 ILT |
502 | else if (type == elfcpp::SHT_NOBITS) |
503 | index = PLACE_BSS; | |
504 | else if ((flags & elfcpp::SHF_WRITE) != 0) | |
505 | index = PLACE_DATA; | |
506 | else if (type == elfcpp::SHT_REL || type == elfcpp::SHT_RELA) | |
507 | index = PLACE_REL; | |
508 | else if ((flags & elfcpp::SHF_EXECINSTR) == 0) | |
509 | index = PLACE_RODATA; | |
510 | else | |
511 | index = PLACE_TEXT; | |
512 | ||
513 | // If we don't have a location yet, try to find one based on a | |
514 | // plausible ordering of sections. | |
515 | if (!this->places_[index].have_location) | |
516 | { | |
517 | Place_index follow; | |
518 | switch (index) | |
519 | { | |
520 | default: | |
521 | follow = PLACE_MAX; | |
522 | break; | |
523 | case PLACE_RODATA: | |
524 | follow = PLACE_TEXT; | |
525 | break; | |
d81222d3 CC |
526 | case PLACE_DATA: |
527 | follow = PLACE_RODATA; | |
528 | if (!this->places_[PLACE_RODATA].have_location) | |
529 | follow = PLACE_TEXT; | |
530 | break; | |
0d371ad3 | 531 | case PLACE_BSS: |
5d9f66cb | 532 | follow = PLACE_LAST_ALLOC; |
0d371ad3 ILT |
533 | break; |
534 | case PLACE_REL: | |
535 | follow = PLACE_TEXT; | |
536 | break; | |
537 | case PLACE_INTERP: | |
538 | follow = PLACE_TEXT; | |
539 | break; | |
6c93b22c ILT |
540 | case PLACE_TLS: |
541 | follow = PLACE_DATA; | |
542 | break; | |
543 | case PLACE_TLS_BSS: | |
544 | follow = PLACE_TLS; | |
545 | if (!this->places_[PLACE_TLS].have_location) | |
546 | follow = PLACE_DATA; | |
547 | break; | |
0d371ad3 ILT |
548 | } |
549 | if (follow != PLACE_MAX && this->places_[follow].have_location) | |
550 | { | |
551 | // Set the location of INDEX to the location of FOLLOW. The | |
552 | // location of INDEX will then be incremented by the caller, | |
553 | // so anything in INDEX will continue to be after anything | |
554 | // in FOLLOW. | |
555 | this->places_[index].location = this->places_[follow].location; | |
556 | this->places_[index].have_location = true; | |
557 | } | |
558 | } | |
559 | ||
560 | *pwhere = &this->places_[index].location; | |
561 | bool ret = this->places_[index].have_location; | |
562 | ||
563 | // The caller will set the location. | |
564 | this->places_[index].have_location = true; | |
565 | ||
566 | return ret; | |
567 | } | |
568 | ||
d81222d3 CC |
569 | // Update PLACE_LAST_ALLOC. |
570 | void | |
571 | Orphan_section_placement::update_last_alloc(Elements_iterator elem) | |
572 | { | |
573 | Elements_iterator prev = elem; | |
574 | --prev; | |
575 | if (this->places_[PLACE_LAST_ALLOC].have_location | |
576 | && this->places_[PLACE_LAST_ALLOC].location == prev) | |
577 | { | |
578 | this->places_[PLACE_LAST_ALLOC].have_location = true; | |
579 | this->places_[PLACE_LAST_ALLOC].location = elem; | |
580 | } | |
581 | } | |
582 | ||
0d371ad3 ILT |
583 | // Return the iterator being used for sections at the very end of the |
584 | // linker script. | |
585 | ||
586 | Orphan_section_placement::Elements_iterator | |
587 | Orphan_section_placement::last_place() const | |
588 | { | |
589 | gold_assert(this->places_[PLACE_LAST].have_location); | |
590 | return this->places_[PLACE_LAST].location; | |
591 | } | |
592 | ||
494e05f4 ILT |
593 | // An element in a SECTIONS clause. |
594 | ||
595 | class Sections_element | |
596 | { | |
597 | public: | |
598 | Sections_element() | |
599 | { } | |
600 | ||
601 | virtual ~Sections_element() | |
602 | { } | |
603 | ||
0d371ad3 ILT |
604 | // Return whether an output section is relro. |
605 | virtual bool | |
606 | is_relro() const | |
607 | { return false; } | |
608 | ||
2d924fd9 ILT |
609 | // Record that an output section is relro. |
610 | virtual void | |
611 | set_is_relro() | |
612 | { } | |
613 | ||
919ed24c ILT |
614 | // Create any required output sections. The only real |
615 | // implementation is in Output_section_definition. | |
616 | virtual void | |
617 | create_sections(Layout*) | |
618 | { } | |
619 | ||
a445fddf ILT |
620 | // Add any symbol being defined to the symbol table. |
621 | virtual void | |
622 | add_symbols_to_table(Symbol_table*) | |
623 | { } | |
624 | ||
625 | // Finalize symbols and check assertions. | |
626 | virtual void | |
77e65537 | 627 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*) |
a445fddf ILT |
628 | { } |
629 | ||
630 | // Return the output section name to use for an input file name and | |
631 | // section name. This only real implementation is in | |
632 | // Output_section_definition. | |
633 | virtual const char* | |
1e5d2fb1 | 634 | output_section_name(const char*, const char*, Output_section***, |
412ffd83 | 635 | Script_sections::Section_type*, bool*, bool) |
a445fddf ILT |
636 | { return NULL; } |
637 | ||
0d371ad3 ILT |
638 | // Initialize OSP with an output section. |
639 | virtual void | |
640 | orphan_section_init(Orphan_section_placement*, | |
641 | Script_sections::Elements_iterator) | |
642 | { } | |
a445fddf ILT |
643 | |
644 | // Set section addresses. This includes applying assignments if the | |
9b547ce6 | 645 | // expression is an absolute value. |
a445fddf | 646 | virtual void |
f6973bdc ILT |
647 | set_section_addresses(Symbol_table*, Layout*, uint64_t*, uint64_t*, |
648 | uint64_t*) | |
a445fddf ILT |
649 | { } |
650 | ||
3802b2dd ILT |
651 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
652 | // this section is constrained, and the input sections do not match, | |
653 | // return the constraint, and set *POSD. | |
654 | virtual Section_constraint | |
655 | check_constraint(Output_section_definition**) | |
656 | { return CONSTRAINT_NONE; } | |
657 | ||
658 | // See if this is the alternate output section for a constrained | |
659 | // output section. If it is, transfer the Output_section and return | |
660 | // true. Otherwise return false. | |
661 | virtual bool | |
662 | alternate_constraint(Output_section_definition*, Section_constraint) | |
663 | { return false; } | |
664 | ||
1c4f3631 ILT |
665 | // Get the list of segments to use for an allocated section when |
666 | // using a PHDRS clause. If this is an allocated section, return | |
2cefc357 ILT |
667 | // the Output_section, and set *PHDRS_LIST (the first parameter) to |
668 | // the list of PHDRS to which it should be attached. If the PHDRS | |
669 | // were not specified, don't change *PHDRS_LIST. When not returning | |
670 | // NULL, set *ORPHAN (the second parameter) according to whether | |
671 | // this is an orphan section--one that is not mentioned in the | |
672 | // linker script. | |
1c4f3631 | 673 | virtual Output_section* |
2cefc357 | 674 | allocate_to_segment(String_list**, bool*) |
1c4f3631 ILT |
675 | { return NULL; } |
676 | ||
8f2eb564 ILT |
677 | // Look for an output section by name and return the address, the |
678 | // load address, the alignment, and the size. This is used when an | |
679 | // expression refers to an output section which was not actually | |
680 | // created. This returns true if the section was found, false | |
681 | // otherwise. The only real definition is for | |
682 | // Output_section_definition. | |
683 | virtual bool | |
684 | get_output_section_info(const char*, uint64_t*, uint64_t*, uint64_t*, | |
685 | uint64_t*) const | |
686 | { return false; } | |
687 | ||
2d924fd9 ILT |
688 | // Return the associated Output_section if there is one. |
689 | virtual Output_section* | |
690 | get_output_section() const | |
691 | { return NULL; } | |
692 | ||
7f8cd844 NC |
693 | // Set the section's memory regions. |
694 | virtual void | |
695 | set_memory_region(Memory_region*, bool) | |
696 | { gold_error(_("Attempt to set a memory region for a non-output section")); } | |
697 | ||
a445fddf | 698 | // Print the element for debugging purposes. |
494e05f4 ILT |
699 | virtual void |
700 | print(FILE* f) const = 0; | |
701 | }; | |
702 | ||
703 | // An assignment in a SECTIONS clause outside of an output section. | |
704 | ||
705 | class Sections_element_assignment : public Sections_element | |
706 | { | |
707 | public: | |
708 | Sections_element_assignment(const char* name, size_t namelen, | |
709 | Expression* val, bool provide, bool hidden) | |
99fff23b | 710 | : assignment_(name, namelen, false, val, provide, hidden) |
494e05f4 ILT |
711 | { } |
712 | ||
a445fddf ILT |
713 | // Add the symbol to the symbol table. |
714 | void | |
715 | add_symbols_to_table(Symbol_table* symtab) | |
716 | { this->assignment_.add_to_table(symtab); } | |
717 | ||
718 | // Finalize the symbol. | |
719 | void | |
720 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 721 | uint64_t* dot_value) |
a445fddf | 722 | { |
77e65537 | 723 | this->assignment_.finalize_with_dot(symtab, layout, *dot_value, NULL); |
a445fddf ILT |
724 | } |
725 | ||
726 | // Set the section address. There is no section here, but if the | |
727 | // value is absolute, we set the symbol. This permits us to use | |
728 | // absolute symbols when setting dot. | |
729 | void | |
730 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc | 731 | uint64_t* dot_value, uint64_t*, uint64_t*) |
a445fddf | 732 | { |
286adcf4 | 733 | this->assignment_.set_if_absolute(symtab, layout, true, *dot_value, NULL); |
a445fddf ILT |
734 | } |
735 | ||
736 | // Print for debugging. | |
494e05f4 ILT |
737 | void |
738 | print(FILE* f) const | |
739 | { | |
740 | fprintf(f, " "); | |
741 | this->assignment_.print(f); | |
742 | } | |
743 | ||
744 | private: | |
745 | Symbol_assignment assignment_; | |
746 | }; | |
747 | ||
a445fddf ILT |
748 | // An assignment to the dot symbol in a SECTIONS clause outside of an |
749 | // output section. | |
750 | ||
751 | class Sections_element_dot_assignment : public Sections_element | |
752 | { | |
753 | public: | |
754 | Sections_element_dot_assignment(Expression* val) | |
755 | : val_(val) | |
756 | { } | |
757 | ||
758 | // Finalize the symbol. | |
759 | void | |
760 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 761 | uint64_t* dot_value) |
a445fddf | 762 | { |
77e65537 ILT |
763 | // We ignore the section of the result because outside of an |
764 | // output section definition the dot symbol is always considered | |
765 | // to be absolute. | |
919ed24c | 766 | *dot_value = this->val_->eval_with_dot(symtab, layout, true, *dot_value, |
286adcf4 | 767 | NULL, NULL, NULL, false); |
a445fddf ILT |
768 | } |
769 | ||
770 | // Update the dot symbol while setting section addresses. | |
771 | void | |
772 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc ILT |
773 | uint64_t* dot_value, uint64_t* dot_alignment, |
774 | uint64_t* load_address) | |
a445fddf | 775 | { |
919ed24c | 776 | *dot_value = this->val_->eval_with_dot(symtab, layout, false, *dot_value, |
286adcf4 | 777 | NULL, NULL, dot_alignment, false); |
fd247bfe | 778 | *load_address = *dot_value; |
a445fddf ILT |
779 | } |
780 | ||
781 | // Print for debugging. | |
782 | void | |
783 | print(FILE* f) const | |
784 | { | |
785 | fprintf(f, " . = "); | |
786 | this->val_->print(f); | |
787 | fprintf(f, "\n"); | |
788 | } | |
789 | ||
790 | private: | |
791 | Expression* val_; | |
792 | }; | |
793 | ||
494e05f4 ILT |
794 | // An assertion in a SECTIONS clause outside of an output section. |
795 | ||
796 | class Sections_element_assertion : public Sections_element | |
797 | { | |
798 | public: | |
799 | Sections_element_assertion(Expression* check, const char* message, | |
800 | size_t messagelen) | |
801 | : assertion_(check, message, messagelen) | |
802 | { } | |
803 | ||
a445fddf ILT |
804 | // Check the assertion. |
805 | void | |
77e65537 | 806 | finalize_symbols(Symbol_table* symtab, const Layout* layout, uint64_t*) |
a445fddf ILT |
807 | { this->assertion_.check(symtab, layout); } |
808 | ||
809 | // Print for debugging. | |
494e05f4 ILT |
810 | void |
811 | print(FILE* f) const | |
812 | { | |
813 | fprintf(f, " "); | |
814 | this->assertion_.print(f); | |
815 | } | |
816 | ||
817 | private: | |
818 | Script_assertion assertion_; | |
819 | }; | |
820 | ||
821 | // An element in an output section in a SECTIONS clause. | |
822 | ||
823 | class Output_section_element | |
824 | { | |
825 | public: | |
a445fddf | 826 | // A list of input sections. |
6625d24e | 827 | typedef std::list<Output_section::Input_section> Input_section_list; |
a445fddf | 828 | |
494e05f4 ILT |
829 | Output_section_element() |
830 | { } | |
831 | ||
832 | virtual ~Output_section_element() | |
833 | { } | |
834 | ||
919ed24c ILT |
835 | // Return whether this element requires an output section to exist. |
836 | virtual bool | |
837 | needs_output_section() const | |
838 | { return false; } | |
839 | ||
a445fddf ILT |
840 | // Add any symbol being defined to the symbol table. |
841 | virtual void | |
842 | add_symbols_to_table(Symbol_table*) | |
843 | { } | |
844 | ||
845 | // Finalize symbols and check assertions. | |
846 | virtual void | |
77e65537 | 847 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*, Output_section**) |
a445fddf ILT |
848 | { } |
849 | ||
850 | // Return whether this element matches FILE_NAME and SECTION_NAME. | |
851 | // The only real implementation is in Output_section_element_input. | |
852 | virtual bool | |
b9b2ae8b | 853 | match_name(const char*, const char*, bool *) const |
a445fddf ILT |
854 | { return false; } |
855 | ||
856 | // Set section addresses. This includes applying assignments if the | |
9b547ce6 | 857 | // expression is an absolute value. |
a445fddf ILT |
858 | virtual void |
859 | set_section_addresses(Symbol_table*, Layout*, Output_section*, uint64_t, | |
f6973bdc | 860 | uint64_t*, uint64_t*, Output_section**, std::string*, |
77e65537 | 861 | Input_section_list*) |
a445fddf ILT |
862 | { } |
863 | ||
864 | // Print the element for debugging purposes. | |
494e05f4 ILT |
865 | virtual void |
866 | print(FILE* f) const = 0; | |
a445fddf ILT |
867 | |
868 | protected: | |
869 | // Return a fill string that is LENGTH bytes long, filling it with | |
870 | // FILL. | |
871 | std::string | |
872 | get_fill_string(const std::string* fill, section_size_type length) const; | |
494e05f4 ILT |
873 | }; |
874 | ||
a445fddf ILT |
875 | std::string |
876 | Output_section_element::get_fill_string(const std::string* fill, | |
877 | section_size_type length) const | |
878 | { | |
879 | std::string this_fill; | |
880 | this_fill.reserve(length); | |
881 | while (this_fill.length() + fill->length() <= length) | |
882 | this_fill += *fill; | |
883 | if (this_fill.length() < length) | |
884 | this_fill.append(*fill, 0, length - this_fill.length()); | |
885 | return this_fill; | |
886 | } | |
887 | ||
494e05f4 ILT |
888 | // A symbol assignment in an output section. |
889 | ||
890 | class Output_section_element_assignment : public Output_section_element | |
891 | { | |
892 | public: | |
893 | Output_section_element_assignment(const char* name, size_t namelen, | |
894 | Expression* val, bool provide, | |
895 | bool hidden) | |
99fff23b | 896 | : assignment_(name, namelen, false, val, provide, hidden) |
494e05f4 ILT |
897 | { } |
898 | ||
a445fddf ILT |
899 | // Add the symbol to the symbol table. |
900 | void | |
901 | add_symbols_to_table(Symbol_table* symtab) | |
902 | { this->assignment_.add_to_table(symtab); } | |
903 | ||
904 | // Finalize the symbol. | |
905 | void | |
906 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 907 | uint64_t* dot_value, Output_section** dot_section) |
a445fddf | 908 | { |
77e65537 ILT |
909 | this->assignment_.finalize_with_dot(symtab, layout, *dot_value, |
910 | *dot_section); | |
a445fddf ILT |
911 | } |
912 | ||
913 | // Set the section address. There is no section here, but if the | |
914 | // value is absolute, we set the symbol. This permits us to use | |
915 | // absolute symbols when setting dot. | |
916 | void | |
917 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 918 | uint64_t, uint64_t* dot_value, uint64_t*, |
286adcf4 CC |
919 | Output_section** dot_section, std::string*, |
920 | Input_section_list*) | |
a445fddf | 921 | { |
286adcf4 CC |
922 | this->assignment_.set_if_absolute(symtab, layout, true, *dot_value, |
923 | *dot_section); | |
a445fddf ILT |
924 | } |
925 | ||
926 | // Print for debugging. | |
494e05f4 ILT |
927 | void |
928 | print(FILE* f) const | |
929 | { | |
930 | fprintf(f, " "); | |
931 | this->assignment_.print(f); | |
932 | } | |
933 | ||
934 | private: | |
935 | Symbol_assignment assignment_; | |
936 | }; | |
937 | ||
a445fddf ILT |
938 | // An assignment to the dot symbol in an output section. |
939 | ||
940 | class Output_section_element_dot_assignment : public Output_section_element | |
941 | { | |
942 | public: | |
943 | Output_section_element_dot_assignment(Expression* val) | |
944 | : val_(val) | |
945 | { } | |
946 | ||
bfc34b3f ILT |
947 | // An assignment to dot within an output section is enough to force |
948 | // the output section to exist. | |
949 | bool | |
950 | needs_output_section() const | |
951 | { return true; } | |
952 | ||
a445fddf ILT |
953 | // Finalize the symbol. |
954 | void | |
955 | finalize_symbols(Symbol_table* symtab, const Layout* layout, | |
77e65537 | 956 | uint64_t* dot_value, Output_section** dot_section) |
a445fddf | 957 | { |
919ed24c | 958 | *dot_value = this->val_->eval_with_dot(symtab, layout, true, *dot_value, |
286adcf4 CC |
959 | *dot_section, dot_section, NULL, |
960 | true); | |
a445fddf ILT |
961 | } |
962 | ||
963 | // Update the dot symbol while setting section addresses. | |
964 | void | |
965 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 966 | uint64_t, uint64_t* dot_value, uint64_t*, |
286adcf4 CC |
967 | Output_section** dot_section, std::string*, |
968 | Input_section_list*); | |
a445fddf ILT |
969 | |
970 | // Print for debugging. | |
971 | void | |
972 | print(FILE* f) const | |
973 | { | |
974 | fprintf(f, " . = "); | |
975 | this->val_->print(f); | |
976 | fprintf(f, "\n"); | |
977 | } | |
978 | ||
979 | private: | |
980 | Expression* val_; | |
981 | }; | |
982 | ||
983 | // Update the dot symbol while setting section addresses. | |
984 | ||
985 | void | |
986 | Output_section_element_dot_assignment::set_section_addresses( | |
987 | Symbol_table* symtab, | |
988 | Layout* layout, | |
989 | Output_section* output_section, | |
990 | uint64_t, | |
991 | uint64_t* dot_value, | |
f6973bdc | 992 | uint64_t* dot_alignment, |
77e65537 | 993 | Output_section** dot_section, |
a445fddf ILT |
994 | std::string* fill, |
995 | Input_section_list*) | |
996 | { | |
919ed24c ILT |
997 | uint64_t next_dot = this->val_->eval_with_dot(symtab, layout, false, |
998 | *dot_value, *dot_section, | |
286adcf4 CC |
999 | dot_section, dot_alignment, |
1000 | true); | |
a445fddf ILT |
1001 | if (next_dot < *dot_value) |
1002 | gold_error(_("dot may not move backward")); | |
1003 | if (next_dot > *dot_value && output_section != NULL) | |
1004 | { | |
1005 | section_size_type length = convert_to_section_size_type(next_dot | |
1006 | - *dot_value); | |
1007 | Output_section_data* posd; | |
1008 | if (fill->empty()) | |
7d9e3d98 | 1009 | posd = new Output_data_zero_fill(length, 0); |
a445fddf ILT |
1010 | else |
1011 | { | |
1012 | std::string this_fill = this->get_fill_string(fill, length); | |
1013 | posd = new Output_data_const(this_fill, 0); | |
1014 | } | |
1015 | output_section->add_output_section_data(posd); | |
20e6d0d6 | 1016 | layout->new_output_section_data_from_script(posd); |
a445fddf ILT |
1017 | } |
1018 | *dot_value = next_dot; | |
1019 | } | |
1020 | ||
494e05f4 ILT |
1021 | // An assertion in an output section. |
1022 | ||
1023 | class Output_section_element_assertion : public Output_section_element | |
1024 | { | |
1025 | public: | |
1026 | Output_section_element_assertion(Expression* check, const char* message, | |
1027 | size_t messagelen) | |
1028 | : assertion_(check, message, messagelen) | |
1029 | { } | |
1030 | ||
1031 | void | |
1032 | print(FILE* f) const | |
1033 | { | |
1034 | fprintf(f, " "); | |
1035 | this->assertion_.print(f); | |
1036 | } | |
1037 | ||
1038 | private: | |
1039 | Script_assertion assertion_; | |
1040 | }; | |
1041 | ||
77e65537 ILT |
1042 | // We use a special instance of Output_section_data to handle BYTE, |
1043 | // SHORT, etc. This permits forward references to symbols in the | |
1044 | // expressions. | |
494e05f4 | 1045 | |
77e65537 | 1046 | class Output_data_expression : public Output_section_data |
494e05f4 ILT |
1047 | { |
1048 | public: | |
77e65537 ILT |
1049 | Output_data_expression(int size, bool is_signed, Expression* val, |
1050 | const Symbol_table* symtab, const Layout* layout, | |
1051 | uint64_t dot_value, Output_section* dot_section) | |
20e6d0d6 | 1052 | : Output_section_data(size, 0, true), |
77e65537 ILT |
1053 | is_signed_(is_signed), val_(val), symtab_(symtab), |
1054 | layout_(layout), dot_value_(dot_value), dot_section_(dot_section) | |
494e05f4 ILT |
1055 | { } |
1056 | ||
77e65537 ILT |
1057 | protected: |
1058 | // Write the data to the output file. | |
a445fddf | 1059 | void |
77e65537 | 1060 | do_write(Output_file*); |
a445fddf | 1061 | |
77e65537 | 1062 | // Write the data to a buffer. |
494e05f4 | 1063 | void |
77e65537 | 1064 | do_write_to_buffer(unsigned char*); |
494e05f4 | 1065 | |
7d9e3d98 ILT |
1066 | // Write to a map file. |
1067 | void | |
1068 | do_print_to_mapfile(Mapfile* mapfile) const | |
1069 | { mapfile->print_output_data(this, _("** expression")); } | |
1070 | ||
494e05f4 | 1071 | private: |
a445fddf | 1072 | template<bool big_endian> |
77e65537 ILT |
1073 | void |
1074 | endian_write_to_buffer(uint64_t, unsigned char*); | |
a445fddf | 1075 | |
494e05f4 | 1076 | bool is_signed_; |
494e05f4 | 1077 | Expression* val_; |
77e65537 ILT |
1078 | const Symbol_table* symtab_; |
1079 | const Layout* layout_; | |
1080 | uint64_t dot_value_; | |
1081 | Output_section* dot_section_; | |
494e05f4 ILT |
1082 | }; |
1083 | ||
77e65537 | 1084 | // Write the data element to the output file. |
a445fddf ILT |
1085 | |
1086 | void | |
77e65537 | 1087 | Output_data_expression::do_write(Output_file* of) |
a445fddf | 1088 | { |
77e65537 ILT |
1089 | unsigned char* view = of->get_output_view(this->offset(), this->data_size()); |
1090 | this->write_to_buffer(view); | |
1091 | of->write_output_view(this->offset(), this->data_size(), view); | |
1092 | } | |
a445fddf | 1093 | |
77e65537 ILT |
1094 | // Write the data element to a buffer. |
1095 | ||
1096 | void | |
1097 | Output_data_expression::do_write_to_buffer(unsigned char* buf) | |
1098 | { | |
77e65537 | 1099 | uint64_t val = this->val_->eval_with_dot(this->symtab_, this->layout_, |
919ed24c | 1100 | true, this->dot_value_, |
286adcf4 CC |
1101 | this->dot_section_, NULL, NULL, |
1102 | false); | |
a445fddf | 1103 | |
8851ecca | 1104 | if (parameters->target().is_big_endian()) |
77e65537 | 1105 | this->endian_write_to_buffer<true>(val, buf); |
a445fddf | 1106 | else |
77e65537 | 1107 | this->endian_write_to_buffer<false>(val, buf); |
a445fddf ILT |
1108 | } |
1109 | ||
a445fddf | 1110 | template<bool big_endian> |
77e65537 ILT |
1111 | void |
1112 | Output_data_expression::endian_write_to_buffer(uint64_t val, | |
1113 | unsigned char* buf) | |
a445fddf | 1114 | { |
77e65537 | 1115 | switch (this->data_size()) |
a445fddf ILT |
1116 | { |
1117 | case 1: | |
1118 | elfcpp::Swap_unaligned<8, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1119 | break; |
1120 | case 2: | |
1121 | elfcpp::Swap_unaligned<16, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1122 | break; |
1123 | case 4: | |
1124 | elfcpp::Swap_unaligned<32, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1125 | break; |
1126 | case 8: | |
8851ecca | 1127 | if (parameters->target().get_size() == 32) |
a445fddf ILT |
1128 | { |
1129 | val &= 0xffffffff; | |
1130 | if (this->is_signed_ && (val & 0x80000000) != 0) | |
1131 | val |= 0xffffffff00000000LL; | |
1132 | } | |
1133 | elfcpp::Swap_unaligned<64, big_endian>::writeval(buf, val); | |
a445fddf ILT |
1134 | break; |
1135 | default: | |
1136 | gold_unreachable(); | |
1137 | } | |
77e65537 ILT |
1138 | } |
1139 | ||
1140 | // A data item in an output section. | |
1141 | ||
1142 | class Output_section_element_data : public Output_section_element | |
1143 | { | |
1144 | public: | |
1145 | Output_section_element_data(int size, bool is_signed, Expression* val) | |
1146 | : size_(size), is_signed_(is_signed), val_(val) | |
1147 | { } | |
1148 | ||
919ed24c ILT |
1149 | // If there is a data item, then we must create an output section. |
1150 | bool | |
1151 | needs_output_section() const | |
1152 | { return true; } | |
1153 | ||
77e65537 ILT |
1154 | // Finalize symbols--we just need to update dot. |
1155 | void | |
1156 | finalize_symbols(Symbol_table*, const Layout*, uint64_t* dot_value, | |
1157 | Output_section**) | |
1158 | { *dot_value += this->size_; } | |
1159 | ||
1160 | // Store the value in the section. | |
1161 | void | |
1162 | set_section_addresses(Symbol_table*, Layout*, Output_section*, uint64_t, | |
f6973bdc ILT |
1163 | uint64_t* dot_value, uint64_t*, Output_section**, |
1164 | std::string*, Input_section_list*); | |
77e65537 ILT |
1165 | |
1166 | // Print for debugging. | |
1167 | void | |
1168 | print(FILE*) const; | |
1169 | ||
1170 | private: | |
1171 | // The size in bytes. | |
1172 | int size_; | |
1173 | // Whether the value is signed. | |
1174 | bool is_signed_; | |
1175 | // The value. | |
1176 | Expression* val_; | |
1177 | }; | |
1178 | ||
1179 | // Store the value in the section. | |
1180 | ||
1181 | void | |
1182 | Output_section_element_data::set_section_addresses( | |
1183 | Symbol_table* symtab, | |
1184 | Layout* layout, | |
1185 | Output_section* os, | |
1186 | uint64_t, | |
1187 | uint64_t* dot_value, | |
f6973bdc | 1188 | uint64_t*, |
77e65537 ILT |
1189 | Output_section** dot_section, |
1190 | std::string*, | |
1191 | Input_section_list*) | |
1192 | { | |
1193 | gold_assert(os != NULL); | |
20e6d0d6 DK |
1194 | Output_data_expression* expression = |
1195 | new Output_data_expression(this->size_, this->is_signed_, this->val_, | |
1196 | symtab, layout, *dot_value, *dot_section); | |
1197 | os->add_output_section_data(expression); | |
1198 | layout->new_output_section_data_from_script(expression); | |
77e65537 | 1199 | *dot_value += this->size_; |
a445fddf ILT |
1200 | } |
1201 | ||
494e05f4 ILT |
1202 | // Print for debugging. |
1203 | ||
1204 | void | |
1205 | Output_section_element_data::print(FILE* f) const | |
1206 | { | |
1207 | const char* s; | |
1208 | switch (this->size_) | |
1209 | { | |
1210 | case 1: | |
1211 | s = "BYTE"; | |
1212 | break; | |
1213 | case 2: | |
1214 | s = "SHORT"; | |
1215 | break; | |
1216 | case 4: | |
1217 | s = "LONG"; | |
1218 | break; | |
1219 | case 8: | |
1220 | if (this->is_signed_) | |
1221 | s = "SQUAD"; | |
1222 | else | |
1223 | s = "QUAD"; | |
1224 | break; | |
1225 | default: | |
1226 | gold_unreachable(); | |
1227 | } | |
1228 | fprintf(f, " %s(", s); | |
1229 | this->val_->print(f); | |
1230 | fprintf(f, ")\n"); | |
1231 | } | |
1232 | ||
1233 | // A fill value setting in an output section. | |
1234 | ||
1235 | class Output_section_element_fill : public Output_section_element | |
1236 | { | |
1237 | public: | |
1238 | Output_section_element_fill(Expression* val) | |
1239 | : val_(val) | |
1240 | { } | |
1241 | ||
a445fddf ILT |
1242 | // Update the fill value while setting section addresses. |
1243 | void | |
1244 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 1245 | uint64_t, uint64_t* dot_value, uint64_t*, |
77e65537 ILT |
1246 | Output_section** dot_section, |
1247 | std::string* fill, Input_section_list*) | |
a445fddf | 1248 | { |
77e65537 | 1249 | Output_section* fill_section; |
919ed24c | 1250 | uint64_t fill_val = this->val_->eval_with_dot(symtab, layout, false, |
77e65537 | 1251 | *dot_value, *dot_section, |
286adcf4 | 1252 | &fill_section, NULL, false); |
77e65537 ILT |
1253 | if (fill_section != NULL) |
1254 | gold_warning(_("fill value is not absolute")); | |
a445fddf ILT |
1255 | // FIXME: The GNU linker supports fill values of arbitrary length. |
1256 | unsigned char fill_buff[4]; | |
1257 | elfcpp::Swap_unaligned<32, true>::writeval(fill_buff, fill_val); | |
1258 | fill->assign(reinterpret_cast<char*>(fill_buff), 4); | |
1259 | } | |
1260 | ||
1261 | // Print for debugging. | |
494e05f4 ILT |
1262 | void |
1263 | print(FILE* f) const | |
1264 | { | |
1265 | fprintf(f, " FILL("); | |
1266 | this->val_->print(f); | |
1267 | fprintf(f, ")\n"); | |
1268 | } | |
1269 | ||
1270 | private: | |
1271 | // The new fill value. | |
1272 | Expression* val_; | |
1273 | }; | |
1274 | ||
1275 | // An input section specification in an output section | |
1276 | ||
1277 | class Output_section_element_input : public Output_section_element | |
1278 | { | |
1279 | public: | |
494e05f4 ILT |
1280 | Output_section_element_input(const Input_section_spec* spec, bool keep); |
1281 | ||
a445fddf ILT |
1282 | // Finalize symbols--just update the value of the dot symbol. |
1283 | void | |
77e65537 ILT |
1284 | finalize_symbols(Symbol_table*, const Layout*, uint64_t* dot_value, |
1285 | Output_section** dot_section) | |
a445fddf ILT |
1286 | { |
1287 | *dot_value = this->final_dot_value_; | |
77e65537 | 1288 | *dot_section = this->final_dot_section_; |
a445fddf ILT |
1289 | } |
1290 | ||
b9b2ae8b NC |
1291 | // See whether we match FILE_NAME and SECTION_NAME as an input section. |
1292 | // If we do then also indicate whether the section should be KEPT. | |
a445fddf | 1293 | bool |
b9b2ae8b | 1294 | match_name(const char* file_name, const char* section_name, bool* keep) const; |
a445fddf ILT |
1295 | |
1296 | // Set the section address. | |
1297 | void | |
1298 | set_section_addresses(Symbol_table* symtab, Layout* layout, Output_section*, | |
f6973bdc | 1299 | uint64_t subalign, uint64_t* dot_value, uint64_t*, |
77e65537 ILT |
1300 | Output_section**, std::string* fill, |
1301 | Input_section_list*); | |
a445fddf ILT |
1302 | |
1303 | // Print for debugging. | |
494e05f4 ILT |
1304 | void |
1305 | print(FILE* f) const; | |
1306 | ||
1307 | private: | |
1308 | // An input section pattern. | |
1309 | struct Input_section_pattern | |
1310 | { | |
1311 | std::string pattern; | |
a445fddf | 1312 | bool pattern_is_wildcard; |
494e05f4 ILT |
1313 | Sort_wildcard sort; |
1314 | ||
1315 | Input_section_pattern(const char* patterna, size_t patternlena, | |
1316 | Sort_wildcard sorta) | |
a445fddf | 1317 | : pattern(patterna, patternlena), |
6e9ba2ca | 1318 | pattern_is_wildcard(is_wildcard_string(this->pattern.c_str())), |
a445fddf | 1319 | sort(sorta) |
494e05f4 ILT |
1320 | { } |
1321 | }; | |
1322 | ||
1323 | typedef std::vector<Input_section_pattern> Input_section_patterns; | |
1324 | ||
a445fddf ILT |
1325 | // Filename_exclusions is a pair of filename pattern and a bool |
1326 | // indicating whether the filename is a wildcard. | |
1327 | typedef std::vector<std::pair<std::string, bool> > Filename_exclusions; | |
1328 | ||
1329 | // Return whether STRING matches PATTERN, where IS_WILDCARD_PATTERN | |
1330 | // indicates whether this is a wildcard pattern. | |
1331 | static inline bool | |
1332 | match(const char* string, const char* pattern, bool is_wildcard_pattern) | |
1333 | { | |
1334 | return (is_wildcard_pattern | |
1335 | ? fnmatch(pattern, string, 0) == 0 | |
1336 | : strcmp(string, pattern) == 0); | |
1337 | } | |
494e05f4 | 1338 | |
a445fddf ILT |
1339 | // See if we match a file name. |
1340 | bool | |
1341 | match_file_name(const char* file_name) const; | |
1342 | ||
1343 | // The file name pattern. If this is the empty string, we match all | |
1344 | // files. | |
494e05f4 | 1345 | std::string filename_pattern_; |
a445fddf ILT |
1346 | // Whether the file name pattern is a wildcard. |
1347 | bool filename_is_wildcard_; | |
494e05f4 ILT |
1348 | // How the file names should be sorted. This may only be |
1349 | // SORT_WILDCARD_NONE or SORT_WILDCARD_BY_NAME. | |
1350 | Sort_wildcard filename_sort_; | |
1351 | // The list of file names to exclude. | |
1352 | Filename_exclusions filename_exclusions_; | |
1353 | // The list of input section patterns. | |
1354 | Input_section_patterns input_section_patterns_; | |
1355 | // Whether to keep this section when garbage collecting. | |
1356 | bool keep_; | |
a445fddf ILT |
1357 | // The value of dot after including all matching sections. |
1358 | uint64_t final_dot_value_; | |
77e65537 ILT |
1359 | // The section where dot is defined after including all matching |
1360 | // sections. | |
1361 | Output_section* final_dot_section_; | |
494e05f4 ILT |
1362 | }; |
1363 | ||
1364 | // Construct Output_section_element_input. The parser records strings | |
1365 | // as pointers into a copy of the script file, which will go away when | |
1366 | // parsing is complete. We make sure they are in std::string objects. | |
1367 | ||
1368 | Output_section_element_input::Output_section_element_input( | |
1369 | const Input_section_spec* spec, | |
1370 | bool keep) | |
a445fddf ILT |
1371 | : filename_pattern_(), |
1372 | filename_is_wildcard_(false), | |
494e05f4 ILT |
1373 | filename_sort_(spec->file.sort), |
1374 | filename_exclusions_(), | |
1375 | input_section_patterns_(), | |
a445fddf | 1376 | keep_(keep), |
77e65537 ILT |
1377 | final_dot_value_(0), |
1378 | final_dot_section_(NULL) | |
494e05f4 | 1379 | { |
a445fddf ILT |
1380 | // The filename pattern "*" is common, and matches all files. Turn |
1381 | // it into the empty string. | |
1382 | if (spec->file.name.length != 1 || spec->file.name.value[0] != '*') | |
1383 | this->filename_pattern_.assign(spec->file.name.value, | |
1384 | spec->file.name.length); | |
6e9ba2ca | 1385 | this->filename_is_wildcard_ = is_wildcard_string(this->filename_pattern_.c_str()); |
a445fddf | 1386 | |
494e05f4 ILT |
1387 | if (spec->input_sections.exclude != NULL) |
1388 | { | |
1389 | for (String_list::const_iterator p = | |
1390 | spec->input_sections.exclude->begin(); | |
1391 | p != spec->input_sections.exclude->end(); | |
1392 | ++p) | |
a445fddf | 1393 | { |
6e9ba2ca | 1394 | bool is_wildcard = is_wildcard_string((*p).c_str()); |
a445fddf ILT |
1395 | this->filename_exclusions_.push_back(std::make_pair(*p, |
1396 | is_wildcard)); | |
1397 | } | |
494e05f4 ILT |
1398 | } |
1399 | ||
1400 | if (spec->input_sections.sections != NULL) | |
1401 | { | |
1402 | Input_section_patterns& isp(this->input_section_patterns_); | |
1403 | for (String_sort_list::const_iterator p = | |
1404 | spec->input_sections.sections->begin(); | |
1405 | p != spec->input_sections.sections->end(); | |
1406 | ++p) | |
1407 | isp.push_back(Input_section_pattern(p->name.value, p->name.length, | |
1408 | p->sort)); | |
1409 | } | |
1410 | } | |
1411 | ||
a445fddf ILT |
1412 | // See whether we match FILE_NAME. |
1413 | ||
1414 | bool | |
1415 | Output_section_element_input::match_file_name(const char* file_name) const | |
1416 | { | |
1417 | if (!this->filename_pattern_.empty()) | |
1418 | { | |
1419 | // If we were called with no filename, we refuse to match a | |
1420 | // pattern which requires a file name. | |
1421 | if (file_name == NULL) | |
1422 | return false; | |
1423 | ||
1424 | if (!match(file_name, this->filename_pattern_.c_str(), | |
1425 | this->filename_is_wildcard_)) | |
1426 | return false; | |
1427 | } | |
1428 | ||
1429 | if (file_name != NULL) | |
1430 | { | |
1431 | // Now we have to see whether FILE_NAME matches one of the | |
1432 | // exclusion patterns, if any. | |
1433 | for (Filename_exclusions::const_iterator p = | |
1434 | this->filename_exclusions_.begin(); | |
1435 | p != this->filename_exclusions_.end(); | |
1436 | ++p) | |
1437 | { | |
1438 | if (match(file_name, p->first.c_str(), p->second)) | |
1439 | return false; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | return true; | |
1444 | } | |
1445 | ||
b9b2ae8b NC |
1446 | // See whether we match FILE_NAME and SECTION_NAME. If we do then |
1447 | // KEEP indicates whether the section should survive garbage collection. | |
a445fddf ILT |
1448 | |
1449 | bool | |
1450 | Output_section_element_input::match_name(const char* file_name, | |
b9b2ae8b NC |
1451 | const char* section_name, |
1452 | bool *keep) const | |
a445fddf ILT |
1453 | { |
1454 | if (!this->match_file_name(file_name)) | |
1455 | return false; | |
1456 | ||
b9b2ae8b NC |
1457 | *keep = this->keep_; |
1458 | ||
a445fddf ILT |
1459 | // If there are no section name patterns, then we match. |
1460 | if (this->input_section_patterns_.empty()) | |
1461 | return true; | |
1462 | ||
1463 | // See whether we match the section name patterns. | |
1464 | for (Input_section_patterns::const_iterator p = | |
1465 | this->input_section_patterns_.begin(); | |
1466 | p != this->input_section_patterns_.end(); | |
1467 | ++p) | |
1468 | { | |
1469 | if (match(section_name, p->pattern.c_str(), p->pattern_is_wildcard)) | |
1470 | return true; | |
1471 | } | |
1472 | ||
1473 | // We didn't match any section names, so we didn't match. | |
1474 | return false; | |
1475 | } | |
1476 | ||
1477 | // Information we use to sort the input sections. | |
1478 | ||
20e6d0d6 | 1479 | class Input_section_info |
a445fddf | 1480 | { |
20e6d0d6 | 1481 | public: |
6625d24e | 1482 | Input_section_info(const Output_section::Input_section& input_section) |
2ea97941 | 1483 | : input_section_(input_section), section_name_(), |
20e6d0d6 DK |
1484 | size_(0), addralign_(1) |
1485 | { } | |
1486 | ||
1487 | // Return the simple input section. | |
6625d24e | 1488 | const Output_section::Input_section& |
20e6d0d6 DK |
1489 | input_section() const |
1490 | { return this->input_section_; } | |
1491 | ||
1492 | // Return the object. | |
1493 | Relobj* | |
1494 | relobj() const | |
1495 | { return this->input_section_.relobj(); } | |
1496 | ||
1497 | // Return the section index. | |
1498 | unsigned int | |
1499 | shndx() | |
1500 | { return this->input_section_.shndx(); } | |
1501 | ||
1502 | // Return the section name. | |
1503 | const std::string& | |
1504 | section_name() const | |
1505 | { return this->section_name_; } | |
1506 | ||
1507 | // Set the section name. | |
1508 | void | |
2ea97941 | 1509 | set_section_name(const std::string name) |
dd68f8fa CC |
1510 | { |
1511 | if (is_compressed_debug_section(name.c_str())) | |
1512 | this->section_name_ = corresponding_uncompressed_section_name(name); | |
1513 | else | |
1514 | this->section_name_ = name; | |
1515 | } | |
20e6d0d6 DK |
1516 | |
1517 | // Return the section size. | |
1518 | uint64_t | |
1519 | size() const | |
1520 | { return this->size_; } | |
1521 | ||
1522 | // Set the section size. | |
1523 | void | |
2ea97941 ILT |
1524 | set_size(uint64_t size) |
1525 | { this->size_ = size; } | |
20e6d0d6 DK |
1526 | |
1527 | // Return the address alignment. | |
1528 | uint64_t | |
1529 | addralign() const | |
1530 | { return this->addralign_; } | |
1531 | ||
1532 | // Set the address alignment. | |
1533 | void | |
2ea97941 ILT |
1534 | set_addralign(uint64_t addralign) |
1535 | { this->addralign_ = addralign; } | |
20e6d0d6 DK |
1536 | |
1537 | private: | |
1538 | // Input section, can be a relaxed section. | |
6625d24e | 1539 | Output_section::Input_section input_section_; |
3785f51a | 1540 | // Name of the section. |
20e6d0d6 DK |
1541 | std::string section_name_; |
1542 | // Section size. | |
1543 | uint64_t size_; | |
1544 | // Address alignment. | |
1545 | uint64_t addralign_; | |
a445fddf ILT |
1546 | }; |
1547 | ||
1548 | // A class to sort the input sections. | |
1549 | ||
1550 | class Input_section_sorter | |
1551 | { | |
1552 | public: | |
1553 | Input_section_sorter(Sort_wildcard filename_sort, Sort_wildcard section_sort) | |
1554 | : filename_sort_(filename_sort), section_sort_(section_sort) | |
1555 | { } | |
1556 | ||
1557 | bool | |
1558 | operator()(const Input_section_info&, const Input_section_info&) const; | |
1559 | ||
1560 | private: | |
f224a3c5 IK |
1561 | static unsigned long |
1562 | get_init_priority(const char*); | |
1563 | ||
a445fddf ILT |
1564 | Sort_wildcard filename_sort_; |
1565 | Sort_wildcard section_sort_; | |
1566 | }; | |
1567 | ||
f224a3c5 IK |
1568 | // Return a relative priority of the section with the specified NAME |
1569 | // (a lower value meand a higher priority), or 0 if it should be compared | |
1570 | // with others as strings. | |
1571 | // The implementation of this function is copied from ld/ldlang.c. | |
1572 | ||
1573 | unsigned long | |
1574 | Input_section_sorter::get_init_priority(const char* name) | |
1575 | { | |
1576 | char* end; | |
1577 | unsigned long init_priority; | |
1578 | ||
1579 | // GCC uses the following section names for the init_priority | |
1580 | // attribute with numerical values 101 and 65535 inclusive. A | |
1581 | // lower value means a higher priority. | |
3785f51a | 1582 | // |
f224a3c5 IK |
1583 | // 1: .init_array.NNNN/.fini_array.NNNN: Where NNNN is the |
1584 | // decimal numerical value of the init_priority attribute. | |
1585 | // The order of execution in .init_array is forward and | |
1586 | // .fini_array is backward. | |
1587 | // 2: .ctors.NNNN/.dtors.NNNN: Where NNNN is 65535 minus the | |
1588 | // decimal numerical value of the init_priority attribute. | |
1589 | // The order of execution in .ctors is backward and .dtors | |
1590 | // is forward. | |
1591 | ||
1592 | if (strncmp(name, ".init_array.", 12) == 0 | |
1593 | || strncmp(name, ".fini_array.", 12) == 0) | |
1594 | { | |
1595 | init_priority = strtoul(name + 12, &end, 10); | |
1596 | return *end ? 0 : init_priority; | |
1597 | } | |
1598 | else if (strncmp(name, ".ctors.", 7) == 0 | |
1599 | || strncmp(name, ".dtors.", 7) == 0) | |
1600 | { | |
1601 | init_priority = strtoul(name + 7, &end, 10); | |
1602 | return *end ? 0 : 65535 - init_priority; | |
1603 | } | |
1604 | ||
1605 | return 0; | |
1606 | } | |
1607 | ||
a445fddf ILT |
1608 | bool |
1609 | Input_section_sorter::operator()(const Input_section_info& isi1, | |
1610 | const Input_section_info& isi2) const | |
1611 | { | |
f224a3c5 IK |
1612 | if (this->section_sort_ == SORT_WILDCARD_BY_INIT_PRIORITY) |
1613 | { | |
1614 | unsigned long ip1 = get_init_priority(isi1.section_name().c_str()); | |
1615 | unsigned long ip2 = get_init_priority(isi2.section_name().c_str()); | |
1616 | if (ip1 != 0 && ip2 != 0 && ip1 != ip2) | |
1617 | return ip1 < ip2; | |
1618 | } | |
a445fddf ILT |
1619 | if (this->section_sort_ == SORT_WILDCARD_BY_NAME |
1620 | || this->section_sort_ == SORT_WILDCARD_BY_NAME_BY_ALIGNMENT | |
1621 | || (this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT_BY_NAME | |
f224a3c5 IK |
1622 | && isi1.addralign() == isi2.addralign()) |
1623 | || this->section_sort_ == SORT_WILDCARD_BY_INIT_PRIORITY) | |
a445fddf | 1624 | { |
20e6d0d6 DK |
1625 | if (isi1.section_name() != isi2.section_name()) |
1626 | return isi1.section_name() < isi2.section_name(); | |
a445fddf ILT |
1627 | } |
1628 | if (this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT | |
1629 | || this->section_sort_ == SORT_WILDCARD_BY_NAME_BY_ALIGNMENT | |
1630 | || this->section_sort_ == SORT_WILDCARD_BY_ALIGNMENT_BY_NAME) | |
1631 | { | |
20e6d0d6 DK |
1632 | if (isi1.addralign() != isi2.addralign()) |
1633 | return isi1.addralign() < isi2.addralign(); | |
a445fddf ILT |
1634 | } |
1635 | if (this->filename_sort_ == SORT_WILDCARD_BY_NAME) | |
1636 | { | |
20e6d0d6 DK |
1637 | if (isi1.relobj()->name() != isi2.relobj()->name()) |
1638 | return (isi1.relobj()->name() < isi2.relobj()->name()); | |
a445fddf ILT |
1639 | } |
1640 | ||
1641 | // Otherwise we leave them in the same order. | |
1642 | return false; | |
1643 | } | |
1644 | ||
1645 | // Set the section address. Look in INPUT_SECTIONS for sections which | |
1646 | // match this spec, sort them as specified, and add them to the output | |
1647 | // section. | |
1648 | ||
1649 | void | |
1650 | Output_section_element_input::set_section_addresses( | |
1651 | Symbol_table*, | |
20e6d0d6 | 1652 | Layout* layout, |
a445fddf ILT |
1653 | Output_section* output_section, |
1654 | uint64_t subalign, | |
1655 | uint64_t* dot_value, | |
f6973bdc | 1656 | uint64_t*, |
77e65537 | 1657 | Output_section** dot_section, |
a445fddf ILT |
1658 | std::string* fill, |
1659 | Input_section_list* input_sections) | |
1660 | { | |
1661 | // We build a list of sections which match each | |
1662 | // Input_section_pattern. | |
1663 | ||
374082df CC |
1664 | // If none of the patterns specify a sort option, we throw all |
1665 | // matching input sections into a single bin, in the order we | |
1666 | // find them. Otherwise, we put matching input sections into | |
1667 | // a separate bin for each pattern, and sort each one as | |
1668 | // specified. Thus, an input section spec like this: | |
1669 | // *(.foo .bar) | |
1670 | // will group all .foo and .bar sections in the order seen, | |
1671 | // whereas this: | |
1672 | // *(.foo) *(.bar) | |
1673 | // will group all .foo sections followed by all .bar sections. | |
1674 | // This matches Gnu ld behavior. | |
1675 | ||
1676 | // Things get really weird, though, when you add a sort spec | |
1677 | // on some, but not all, of the patterns, like this: | |
1678 | // *(SORT_BY_NAME(.foo) .bar) | |
1679 | // We do not attempt to match Gnu ld behavior in this case. | |
1680 | ||
a445fddf ILT |
1681 | typedef std::vector<std::vector<Input_section_info> > Matching_sections; |
1682 | size_t input_pattern_count = this->input_section_patterns_.size(); | |
3ca25b56 | 1683 | size_t bin_count = 1; |
374082df CC |
1684 | bool any_patterns_with_sort = false; |
1685 | for (size_t i = 0; i < input_pattern_count; ++i) | |
1686 | { | |
1687 | const Input_section_pattern& isp(this->input_section_patterns_[i]); | |
1688 | if (isp.sort != SORT_WILDCARD_NONE) | |
1689 | any_patterns_with_sort = true; | |
1690 | } | |
3ca25b56 CC |
1691 | if (any_patterns_with_sort) |
1692 | bin_count = input_pattern_count; | |
1693 | Matching_sections matching_sections(bin_count); | |
a445fddf ILT |
1694 | |
1695 | // Look through the list of sections for this output section. Add | |
1696 | // each one which matches to one of the elements of | |
1697 | // MATCHING_SECTIONS. | |
1698 | ||
1699 | Input_section_list::iterator p = input_sections->begin(); | |
1700 | while (p != input_sections->end()) | |
1701 | { | |
20e6d0d6 | 1702 | Relobj* relobj = p->relobj(); |
3785f51a | 1703 | unsigned int shndx = p->shndx(); |
20e6d0d6 DK |
1704 | Input_section_info isi(*p); |
1705 | ||
a445fddf ILT |
1706 | // Calling section_name and section_addralign is not very |
1707 | // efficient. | |
a445fddf ILT |
1708 | |
1709 | // Lock the object so that we can get information about the | |
1710 | // section. This is OK since we know we are single-threaded | |
1711 | // here. | |
1712 | { | |
1713 | const Task* task = reinterpret_cast<const Task*>(-1); | |
20e6d0d6 DK |
1714 | Task_lock_obj<Object> tl(task, relobj); |
1715 | ||
1716 | isi.set_section_name(relobj->section_name(shndx)); | |
1717 | if (p->is_relaxed_input_section()) | |
c0a62865 | 1718 | { |
ea5cae92 | 1719 | // We use current data size because relaxed section sizes may not |
c0a62865 DK |
1720 | // have finalized yet. |
1721 | isi.set_size(p->relaxed_input_section()->current_data_size()); | |
1722 | isi.set_addralign(p->relaxed_input_section()->addralign()); | |
1723 | } | |
20e6d0d6 | 1724 | else |
c0a62865 DK |
1725 | { |
1726 | isi.set_size(relobj->section_size(shndx)); | |
1727 | isi.set_addralign(relobj->section_addralign(shndx)); | |
1728 | } | |
a445fddf ILT |
1729 | } |
1730 | ||
20e6d0d6 | 1731 | if (!this->match_file_name(relobj->name().c_str())) |
a445fddf ILT |
1732 | ++p; |
1733 | else if (this->input_section_patterns_.empty()) | |
1734 | { | |
1735 | matching_sections[0].push_back(isi); | |
1736 | p = input_sections->erase(p); | |
1737 | } | |
1738 | else | |
1739 | { | |
1740 | size_t i; | |
1741 | for (i = 0; i < input_pattern_count; ++i) | |
1742 | { | |
1743 | const Input_section_pattern& | |
1744 | isp(this->input_section_patterns_[i]); | |
20e6d0d6 | 1745 | if (match(isi.section_name().c_str(), isp.pattern.c_str(), |
a445fddf ILT |
1746 | isp.pattern_is_wildcard)) |
1747 | break; | |
1748 | } | |
1749 | ||
3ca25b56 | 1750 | if (i >= input_pattern_count) |
a445fddf ILT |
1751 | ++p; |
1752 | else | |
1753 | { | |
3ca25b56 | 1754 | if (i >= bin_count) |
374082df | 1755 | i = 0; |
a445fddf ILT |
1756 | matching_sections[i].push_back(isi); |
1757 | p = input_sections->erase(p); | |
1758 | } | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | // Look through MATCHING_SECTIONS. Sort each one as specified, | |
1763 | // using a stable sort so that we get the default order when | |
1764 | // sections are otherwise equal. Add each input section to the | |
1765 | // output section. | |
1766 | ||
661be1e2 | 1767 | uint64_t dot = *dot_value; |
3ca25b56 | 1768 | for (size_t i = 0; i < bin_count; ++i) |
a445fddf ILT |
1769 | { |
1770 | if (matching_sections[i].empty()) | |
1771 | continue; | |
1772 | ||
1773 | gold_assert(output_section != NULL); | |
1774 | ||
1775 | const Input_section_pattern& isp(this->input_section_patterns_[i]); | |
1776 | if (isp.sort != SORT_WILDCARD_NONE | |
1777 | || this->filename_sort_ != SORT_WILDCARD_NONE) | |
1778 | std::stable_sort(matching_sections[i].begin(), | |
1779 | matching_sections[i].end(), | |
1780 | Input_section_sorter(this->filename_sort_, | |
1781 | isp.sort)); | |
1782 | ||
2ea97941 | 1783 | for (std::vector<Input_section_info>::const_iterator p = |
a445fddf | 1784 | matching_sections[i].begin(); |
2ea97941 ILT |
1785 | p != matching_sections[i].end(); |
1786 | ++p) | |
a445fddf | 1787 | { |
5d9f66cb CC |
1788 | // Override the original address alignment if SUBALIGN is specified. |
1789 | // We need to make a copy of the input section to modify the | |
1790 | // alignment. | |
6625d24e DK |
1791 | Output_section::Input_section sis(p->input_section()); |
1792 | ||
1793 | uint64_t this_subalign = sis.addralign(); | |
1794 | if (!sis.is_input_section()) | |
3785f51a | 1795 | sis.output_section_data()->finalize_data_size(); |
6625d24e | 1796 | uint64_t data_size = sis.data_size(); |
5d9f66cb | 1797 | if (subalign > 0) |
6625d24e DK |
1798 | { |
1799 | this_subalign = subalign; | |
1800 | sis.set_addralign(subalign); | |
1801 | } | |
a445fddf | 1802 | |
661be1e2 | 1803 | uint64_t address = align_address(dot, this_subalign); |
a445fddf | 1804 | |
661be1e2 | 1805 | if (address > dot && !fill->empty()) |
a445fddf ILT |
1806 | { |
1807 | section_size_type length = | |
661be1e2 | 1808 | convert_to_section_size_type(address - dot); |
a445fddf ILT |
1809 | std::string this_fill = this->get_fill_string(fill, length); |
1810 | Output_section_data* posd = new Output_data_const(this_fill, 0); | |
1811 | output_section->add_output_section_data(posd); | |
20e6d0d6 | 1812 | layout->new_output_section_data_from_script(posd); |
a445fddf ILT |
1813 | } |
1814 | ||
6625d24e DK |
1815 | output_section->add_script_input_section(sis); |
1816 | dot = address + data_size; | |
a445fddf ILT |
1817 | } |
1818 | } | |
1819 | ||
661be1e2 ILT |
1820 | // An SHF_TLS/SHT_NOBITS section does not take up any |
1821 | // address space. | |
1822 | if (output_section == NULL | |
1823 | || (output_section->flags() & elfcpp::SHF_TLS) == 0 | |
1824 | || output_section->type() != elfcpp::SHT_NOBITS) | |
1825 | *dot_value = dot; | |
1826 | ||
a445fddf | 1827 | this->final_dot_value_ = *dot_value; |
77e65537 | 1828 | this->final_dot_section_ = *dot_section; |
a445fddf ILT |
1829 | } |
1830 | ||
494e05f4 ILT |
1831 | // Print for debugging. |
1832 | ||
1833 | void | |
1834 | Output_section_element_input::print(FILE* f) const | |
1835 | { | |
1836 | fprintf(f, " "); | |
1837 | ||
1838 | if (this->keep_) | |
1839 | fprintf(f, "KEEP("); | |
1840 | ||
1841 | if (!this->filename_pattern_.empty()) | |
1842 | { | |
1843 | bool need_close_paren = false; | |
1844 | switch (this->filename_sort_) | |
1845 | { | |
1846 | case SORT_WILDCARD_NONE: | |
1847 | break; | |
1848 | case SORT_WILDCARD_BY_NAME: | |
1849 | fprintf(f, "SORT_BY_NAME("); | |
1850 | need_close_paren = true; | |
1851 | break; | |
1852 | default: | |
1853 | gold_unreachable(); | |
1854 | } | |
1855 | ||
1856 | fprintf(f, "%s", this->filename_pattern_.c_str()); | |
1857 | ||
1858 | if (need_close_paren) | |
1859 | fprintf(f, ")"); | |
1860 | } | |
1861 | ||
1862 | if (!this->input_section_patterns_.empty() | |
1863 | || !this->filename_exclusions_.empty()) | |
1864 | { | |
1865 | fprintf(f, "("); | |
1866 | ||
1867 | bool need_space = false; | |
1868 | if (!this->filename_exclusions_.empty()) | |
1869 | { | |
1870 | fprintf(f, "EXCLUDE_FILE("); | |
1871 | bool need_comma = false; | |
1872 | for (Filename_exclusions::const_iterator p = | |
1873 | this->filename_exclusions_.begin(); | |
1874 | p != this->filename_exclusions_.end(); | |
1875 | ++p) | |
1876 | { | |
1877 | if (need_comma) | |
1878 | fprintf(f, ", "); | |
a445fddf | 1879 | fprintf(f, "%s", p->first.c_str()); |
494e05f4 ILT |
1880 | need_comma = true; |
1881 | } | |
1882 | fprintf(f, ")"); | |
1883 | need_space = true; | |
1884 | } | |
1885 | ||
1886 | for (Input_section_patterns::const_iterator p = | |
1887 | this->input_section_patterns_.begin(); | |
1888 | p != this->input_section_patterns_.end(); | |
1889 | ++p) | |
1890 | { | |
1891 | if (need_space) | |
1892 | fprintf(f, " "); | |
1893 | ||
1894 | int close_parens = 0; | |
1895 | switch (p->sort) | |
1896 | { | |
1897 | case SORT_WILDCARD_NONE: | |
1898 | break; | |
1899 | case SORT_WILDCARD_BY_NAME: | |
1900 | fprintf(f, "SORT_BY_NAME("); | |
1901 | close_parens = 1; | |
1902 | break; | |
1903 | case SORT_WILDCARD_BY_ALIGNMENT: | |
1904 | fprintf(f, "SORT_BY_ALIGNMENT("); | |
1905 | close_parens = 1; | |
1906 | break; | |
1907 | case SORT_WILDCARD_BY_NAME_BY_ALIGNMENT: | |
1908 | fprintf(f, "SORT_BY_NAME(SORT_BY_ALIGNMENT("); | |
1909 | close_parens = 2; | |
1910 | break; | |
1911 | case SORT_WILDCARD_BY_ALIGNMENT_BY_NAME: | |
1912 | fprintf(f, "SORT_BY_ALIGNMENT(SORT_BY_NAME("); | |
1913 | close_parens = 2; | |
1914 | break; | |
f224a3c5 IK |
1915 | case SORT_WILDCARD_BY_INIT_PRIORITY: |
1916 | fprintf(f, "SORT_BY_INIT_PRIORITY("); | |
1917 | close_parens = 1; | |
1918 | break; | |
494e05f4 ILT |
1919 | default: |
1920 | gold_unreachable(); | |
1921 | } | |
1922 | ||
1923 | fprintf(f, "%s", p->pattern.c_str()); | |
1924 | ||
1925 | for (int i = 0; i < close_parens; ++i) | |
1926 | fprintf(f, ")"); | |
1927 | ||
1928 | need_space = true; | |
1929 | } | |
1930 | ||
1931 | fprintf(f, ")"); | |
1932 | } | |
1933 | ||
1934 | if (this->keep_) | |
1935 | fprintf(f, ")"); | |
1936 | ||
1937 | fprintf(f, "\n"); | |
1938 | } | |
1939 | ||
1940 | // An output section. | |
1941 | ||
1942 | class Output_section_definition : public Sections_element | |
1943 | { | |
1944 | public: | |
a445fddf ILT |
1945 | typedef Output_section_element::Input_section_list Input_section_list; |
1946 | ||
494e05f4 ILT |
1947 | Output_section_definition(const char* name, size_t namelen, |
1948 | const Parser_output_section_header* header); | |
1949 | ||
1950 | // Finish the output section with the information in the trailer. | |
1951 | void | |
1952 | finish(const Parser_output_section_trailer* trailer); | |
1953 | ||
1954 | // Add a symbol to be defined. | |
1955 | void | |
1956 | add_symbol_assignment(const char* name, size_t length, Expression* value, | |
1957 | bool provide, bool hidden); | |
a445fddf ILT |
1958 | |
1959 | // Add an assignment to the special dot symbol. | |
1960 | void | |
1961 | add_dot_assignment(Expression* value); | |
1962 | ||
494e05f4 ILT |
1963 | // Add an assertion. |
1964 | void | |
1965 | add_assertion(Expression* check, const char* message, size_t messagelen); | |
1966 | ||
1967 | // Add a data item to the current output section. | |
1968 | void | |
1969 | add_data(int size, bool is_signed, Expression* val); | |
1970 | ||
1971 | // Add a setting for the fill value. | |
1972 | void | |
1973 | add_fill(Expression* val); | |
1974 | ||
1975 | // Add an input section specification. | |
1976 | void | |
1977 | add_input_section(const Input_section_spec* spec, bool keep); | |
1978 | ||
0d371ad3 ILT |
1979 | // Return whether the output section is relro. |
1980 | bool | |
1981 | is_relro() const | |
1982 | { return this->is_relro_; } | |
1983 | ||
2d924fd9 ILT |
1984 | // Record that the output section is relro. |
1985 | void | |
1986 | set_is_relro() | |
1987 | { this->is_relro_ = true; } | |
1988 | ||
919ed24c ILT |
1989 | // Create any required output sections. |
1990 | void | |
1991 | create_sections(Layout*); | |
1992 | ||
a445fddf ILT |
1993 | // Add any symbols being defined to the symbol table. |
1994 | void | |
1995 | add_symbols_to_table(Symbol_table* symtab); | |
1996 | ||
1997 | // Finalize symbols and check assertions. | |
1998 | void | |
77e65537 | 1999 | finalize_symbols(Symbol_table*, const Layout*, uint64_t*); |
a445fddf ILT |
2000 | |
2001 | // Return the output section name to use for an input file name and | |
2002 | // section name. | |
2003 | const char* | |
2004 | output_section_name(const char* file_name, const char* section_name, | |
b9b2ae8b | 2005 | Output_section***, Script_sections::Section_type*, |
412ffd83 | 2006 | bool*, bool); |
a445fddf | 2007 | |
0d371ad3 ILT |
2008 | // Initialize OSP with an output section. |
2009 | void | |
2010 | orphan_section_init(Orphan_section_placement* osp, | |
2011 | Script_sections::Elements_iterator p) | |
2012 | { osp->output_section_init(this->name_, this->output_section_, p); } | |
a445fddf ILT |
2013 | |
2014 | // Set the section address. | |
2015 | void | |
2016 | set_section_addresses(Symbol_table* symtab, Layout* layout, | |
f6973bdc ILT |
2017 | uint64_t* dot_value, uint64_t*, |
2018 | uint64_t* load_address); | |
a445fddf | 2019 | |
3802b2dd ILT |
2020 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
2021 | // this section is constrained, and the input sections do not match, | |
2022 | // return the constraint, and set *POSD. | |
2023 | Section_constraint | |
2024 | check_constraint(Output_section_definition** posd); | |
2025 | ||
2026 | // See if this is the alternate output section for a constrained | |
2027 | // output section. If it is, transfer the Output_section and return | |
2028 | // true. Otherwise return false. | |
2029 | bool | |
2030 | alternate_constraint(Output_section_definition*, Section_constraint); | |
2031 | ||
1c4f3631 | 2032 | // Get the list of segments to use for an allocated section when |
2cefc357 | 2033 | // using a PHDRS clause. |
1c4f3631 | 2034 | Output_section* |
2cefc357 | 2035 | allocate_to_segment(String_list** phdrs_list, bool* orphan); |
1c4f3631 | 2036 | |
8f2eb564 ILT |
2037 | // Look for an output section by name and return the address, the |
2038 | // load address, the alignment, and the size. This is used when an | |
2039 | // expression refers to an output section which was not actually | |
2040 | // created. This returns true if the section was found, false | |
2041 | // otherwise. | |
2042 | bool | |
2043 | get_output_section_info(const char*, uint64_t*, uint64_t*, uint64_t*, | |
2044 | uint64_t*) const; | |
2045 | ||
2d924fd9 ILT |
2046 | // Return the associated Output_section if there is one. |
2047 | Output_section* | |
2048 | get_output_section() const | |
2049 | { return this->output_section_; } | |
2050 | ||
494e05f4 ILT |
2051 | // Print the contents to the FILE. This is for debugging. |
2052 | void | |
2053 | print(FILE*) const; | |
2054 | ||
1e5d2fb1 DK |
2055 | // Return the output section type if specified or Script_sections::ST_NONE. |
2056 | Script_sections::Section_type | |
2057 | section_type() const; | |
2058 | ||
7f8cd844 NC |
2059 | // Store the memory region to use. |
2060 | void | |
2061 | set_memory_region(Memory_region*, bool set_vma); | |
2062 | ||
2063 | void | |
2064 | set_section_vma(Expression* address) | |
2065 | { this->address_ = address; } | |
3785f51a | 2066 | |
7f8cd844 NC |
2067 | void |
2068 | set_section_lma(Expression* address) | |
2069 | { this->load_address_ = address; } | |
2070 | ||
ea5cae92 NC |
2071 | const std::string& |
2072 | get_section_name() const | |
7f8cd844 | 2073 | { return this->name_; } |
3785f51a | 2074 | |
494e05f4 | 2075 | private: |
1e5d2fb1 DK |
2076 | static const char* |
2077 | script_section_type_name(Script_section_type); | |
2078 | ||
494e05f4 ILT |
2079 | typedef std::vector<Output_section_element*> Output_section_elements; |
2080 | ||
2081 | // The output section name. | |
2082 | std::string name_; | |
2083 | // The address. This may be NULL. | |
2084 | Expression* address_; | |
2085 | // The load address. This may be NULL. | |
2086 | Expression* load_address_; | |
2087 | // The alignment. This may be NULL. | |
2088 | Expression* align_; | |
2089 | // The input section alignment. This may be NULL. | |
2090 | Expression* subalign_; | |
3802b2dd ILT |
2091 | // The constraint, if any. |
2092 | Section_constraint constraint_; | |
494e05f4 ILT |
2093 | // The fill value. This may be NULL. |
2094 | Expression* fill_; | |
1c4f3631 ILT |
2095 | // The list of segments this section should go into. This may be |
2096 | // NULL. | |
2097 | String_list* phdrs_; | |
494e05f4 ILT |
2098 | // The list of elements defining the section. |
2099 | Output_section_elements elements_; | |
a445fddf ILT |
2100 | // The Output_section created for this definition. This will be |
2101 | // NULL if none was created. | |
2102 | Output_section* output_section_; | |
8f2eb564 ILT |
2103 | // The address after it has been evaluated. |
2104 | uint64_t evaluated_address_; | |
2105 | // The load address after it has been evaluated. | |
2106 | uint64_t evaluated_load_address_; | |
2107 | // The alignment after it has been evaluated. | |
2108 | uint64_t evaluated_addralign_; | |
2d924fd9 ILT |
2109 | // The output section is relro. |
2110 | bool is_relro_; | |
1e5d2fb1 DK |
2111 | // The output section type if specified. |
2112 | enum Script_section_type script_section_type_; | |
494e05f4 ILT |
2113 | }; |
2114 | ||
2115 | // Constructor. | |
2116 | ||
2117 | Output_section_definition::Output_section_definition( | |
2118 | const char* name, | |
2119 | size_t namelen, | |
2120 | const Parser_output_section_header* header) | |
2121 | : name_(name, namelen), | |
2122 | address_(header->address), | |
2123 | load_address_(header->load_address), | |
2124 | align_(header->align), | |
2125 | subalign_(header->subalign), | |
3802b2dd | 2126 | constraint_(header->constraint), |
494e05f4 | 2127 | fill_(NULL), |
1c4f3631 | 2128 | phdrs_(NULL), |
a445fddf | 2129 | elements_(), |
2d924fd9 ILT |
2130 | output_section_(NULL), |
2131 | evaluated_address_(0), | |
2132 | evaluated_load_address_(0), | |
2133 | evaluated_addralign_(0), | |
1e5d2fb1 DK |
2134 | is_relro_(false), |
2135 | script_section_type_(header->section_type) | |
494e05f4 ILT |
2136 | { |
2137 | } | |
2138 | ||
2139 | // Finish an output section. | |
2140 | ||
2141 | void | |
2142 | Output_section_definition::finish(const Parser_output_section_trailer* trailer) | |
2143 | { | |
2144 | this->fill_ = trailer->fill; | |
1c4f3631 | 2145 | this->phdrs_ = trailer->phdrs; |
494e05f4 ILT |
2146 | } |
2147 | ||
2148 | // Add a symbol to be defined. | |
2149 | ||
2150 | void | |
2151 | Output_section_definition::add_symbol_assignment(const char* name, | |
2152 | size_t length, | |
2153 | Expression* value, | |
2154 | bool provide, | |
2155 | bool hidden) | |
2156 | { | |
2157 | Output_section_element* p = new Output_section_element_assignment(name, | |
2158 | length, | |
2159 | value, | |
2160 | provide, | |
2161 | hidden); | |
2162 | this->elements_.push_back(p); | |
2163 | } | |
2164 | ||
a445fddf | 2165 | // Add an assignment to the special dot symbol. |
494e05f4 ILT |
2166 | |
2167 | void | |
a445fddf ILT |
2168 | Output_section_definition::add_dot_assignment(Expression* value) |
2169 | { | |
2170 | Output_section_element* p = new Output_section_element_dot_assignment(value); | |
2171 | this->elements_.push_back(p); | |
2172 | } | |
2173 | ||
2174 | // Add an assertion. | |
2175 | ||
2176 | void | |
2177 | Output_section_definition::add_assertion(Expression* check, | |
2178 | const char* message, | |
494e05f4 ILT |
2179 | size_t messagelen) |
2180 | { | |
2181 | Output_section_element* p = new Output_section_element_assertion(check, | |
2182 | message, | |
2183 | messagelen); | |
2184 | this->elements_.push_back(p); | |
2185 | } | |
2186 | ||
2187 | // Add a data item to the current output section. | |
2188 | ||
2189 | void | |
2190 | Output_section_definition::add_data(int size, bool is_signed, Expression* val) | |
2191 | { | |
2192 | Output_section_element* p = new Output_section_element_data(size, is_signed, | |
2193 | val); | |
2194 | this->elements_.push_back(p); | |
2195 | } | |
2196 | ||
2197 | // Add a setting for the fill value. | |
2198 | ||
2199 | void | |
2200 | Output_section_definition::add_fill(Expression* val) | |
2201 | { | |
2202 | Output_section_element* p = new Output_section_element_fill(val); | |
2203 | this->elements_.push_back(p); | |
2204 | } | |
2205 | ||
2206 | // Add an input section specification. | |
2207 | ||
2208 | void | |
2209 | Output_section_definition::add_input_section(const Input_section_spec* spec, | |
2210 | bool keep) | |
2211 | { | |
2212 | Output_section_element* p = new Output_section_element_input(spec, keep); | |
2213 | this->elements_.push_back(p); | |
2214 | } | |
2215 | ||
919ed24c ILT |
2216 | // Create any required output sections. We need an output section if |
2217 | // there is a data statement here. | |
2218 | ||
2219 | void | |
2220 | Output_section_definition::create_sections(Layout* layout) | |
2221 | { | |
2222 | if (this->output_section_ != NULL) | |
2223 | return; | |
2224 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2225 | p != this->elements_.end(); | |
2226 | ++p) | |
2227 | { | |
2228 | if ((*p)->needs_output_section()) | |
2229 | { | |
2230 | const char* name = this->name_.c_str(); | |
1e5d2fb1 DK |
2231 | this->output_section_ = |
2232 | layout->make_output_section_for_script(name, this->section_type()); | |
919ed24c ILT |
2233 | return; |
2234 | } | |
2235 | } | |
2236 | } | |
2237 | ||
a445fddf ILT |
2238 | // Add any symbols being defined to the symbol table. |
2239 | ||
2240 | void | |
2241 | Output_section_definition::add_symbols_to_table(Symbol_table* symtab) | |
2242 | { | |
2243 | for (Output_section_elements::iterator p = this->elements_.begin(); | |
2244 | p != this->elements_.end(); | |
2245 | ++p) | |
2246 | (*p)->add_symbols_to_table(symtab); | |
2247 | } | |
2248 | ||
2249 | // Finalize symbols and check assertions. | |
2250 | ||
2251 | void | |
2252 | Output_section_definition::finalize_symbols(Symbol_table* symtab, | |
2253 | const Layout* layout, | |
a445fddf ILT |
2254 | uint64_t* dot_value) |
2255 | { | |
2256 | if (this->output_section_ != NULL) | |
2257 | *dot_value = this->output_section_->address(); | |
2258 | else | |
2259 | { | |
2260 | uint64_t address = *dot_value; | |
2261 | if (this->address_ != NULL) | |
2262 | { | |
919ed24c | 2263 | address = this->address_->eval_with_dot(symtab, layout, true, |
77e65537 | 2264 | *dot_value, NULL, |
286adcf4 | 2265 | NULL, NULL, false); |
a445fddf ILT |
2266 | } |
2267 | if (this->align_ != NULL) | |
2268 | { | |
919ed24c | 2269 | uint64_t align = this->align_->eval_with_dot(symtab, layout, true, |
bacff3ab | 2270 | *dot_value, NULL, |
286adcf4 | 2271 | NULL, NULL, false); |
a445fddf ILT |
2272 | address = align_address(address, align); |
2273 | } | |
2274 | *dot_value = address; | |
2275 | } | |
a445fddf | 2276 | |
77e65537 | 2277 | Output_section* dot_section = this->output_section_; |
a445fddf ILT |
2278 | for (Output_section_elements::iterator p = this->elements_.begin(); |
2279 | p != this->elements_.end(); | |
2280 | ++p) | |
77e65537 | 2281 | (*p)->finalize_symbols(symtab, layout, dot_value, &dot_section); |
a445fddf ILT |
2282 | } |
2283 | ||
2284 | // Return the output section name to use for an input section name. | |
2285 | ||
2286 | const char* | |
1e5d2fb1 DK |
2287 | Output_section_definition::output_section_name( |
2288 | const char* file_name, | |
2289 | const char* section_name, | |
2290 | Output_section*** slot, | |
b9b2ae8b | 2291 | Script_sections::Section_type* psection_type, |
412ffd83 CC |
2292 | bool* keep, |
2293 | bool match_input_spec) | |
a445fddf | 2294 | { |
412ffd83 | 2295 | // If the section is a linker-created output section, just look for a match |
bfbf34de | 2296 | // on the output section name. |
412ffd83 | 2297 | if (!match_input_spec && this->name_ != "/DISCARD/") |
bfbf34de CC |
2298 | { |
2299 | if (this->name_ != section_name) | |
2300 | return NULL; | |
2301 | *slot = &this->output_section_; | |
2302 | *psection_type = this->section_type(); | |
2303 | return this->name_.c_str(); | |
2304 | } | |
2305 | ||
a445fddf ILT |
2306 | // Ask each element whether it matches NAME. |
2307 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2308 | p != this->elements_.end(); | |
2309 | ++p) | |
2310 | { | |
b9b2ae8b | 2311 | if ((*p)->match_name(file_name, section_name, keep)) |
a445fddf ILT |
2312 | { |
2313 | // We found a match for NAME, which means that it should go | |
2314 | // into this output section. | |
2315 | *slot = &this->output_section_; | |
1e5d2fb1 | 2316 | *psection_type = this->section_type(); |
a445fddf ILT |
2317 | return this->name_.c_str(); |
2318 | } | |
2319 | } | |
2320 | ||
2321 | // We don't know about this section name. | |
2322 | return NULL; | |
2323 | } | |
2324 | ||
ea5cae92 NC |
2325 | // Return true if memory from START to START + LENGTH is contained |
2326 | // within a memory region. | |
2327 | ||
2328 | bool | |
2329 | Script_sections::block_in_region(Symbol_table* symtab, Layout* layout, | |
2330 | uint64_t start, uint64_t length) const | |
2331 | { | |
2332 | if (this->memory_regions_ == NULL) | |
2333 | return false; | |
2334 | ||
2335 | for (Memory_regions::const_iterator mr = this->memory_regions_->begin(); | |
2336 | mr != this->memory_regions_->end(); | |
2337 | ++mr) | |
2338 | { | |
2339 | uint64_t s = (*mr)->start_address()->eval(symtab, layout, false); | |
2340 | uint64_t l = (*mr)->length()->eval(symtab, layout, false); | |
2341 | ||
2342 | if (s <= start | |
2343 | && (s + l) >= (start + length)) | |
2344 | return true; | |
2345 | } | |
2346 | ||
2347 | return false; | |
2348 | } | |
2349 | ||
2350 | // Find a memory region that should be used by a given output SECTION. | |
2351 | // If provided set PREVIOUS_SECTION_RETURN to point to the last section | |
2352 | // that used the return memory region. | |
2353 | ||
2354 | Memory_region* | |
2355 | Script_sections::find_memory_region( | |
2356 | Output_section_definition* section, | |
2357 | bool find_vma_region, | |
7c61d651 | 2358 | bool explicit_only, |
ea5cae92 NC |
2359 | Output_section_definition** previous_section_return) |
2360 | { | |
2361 | if (previous_section_return != NULL) | |
2362 | * previous_section_return = NULL; | |
2363 | ||
2364 | // Walk the memory regions specified in this script, if any. | |
2365 | if (this->memory_regions_ == NULL) | |
2366 | return NULL; | |
2367 | ||
2368 | // The /DISCARD/ section never gets assigned to any region. | |
2369 | if (section->get_section_name() == "/DISCARD/") | |
2370 | return NULL; | |
2371 | ||
2372 | Memory_region* first_match = NULL; | |
2373 | ||
2374 | // First check to see if a region has been assigned to this section. | |
2375 | for (Memory_regions::const_iterator mr = this->memory_regions_->begin(); | |
2376 | mr != this->memory_regions_->end(); | |
2377 | ++mr) | |
2378 | { | |
2379 | if (find_vma_region) | |
2380 | { | |
2381 | for (Memory_region::Section_list::const_iterator s = | |
2382 | (*mr)->get_vma_section_list_start(); | |
2383 | s != (*mr)->get_vma_section_list_end(); | |
2384 | ++s) | |
2385 | if ((*s) == section) | |
2386 | { | |
2387 | (*mr)->set_last_section(section); | |
2388 | return *mr; | |
2389 | } | |
2390 | } | |
2391 | else | |
2392 | { | |
2393 | for (Memory_region::Section_list::const_iterator s = | |
2394 | (*mr)->get_lma_section_list_start(); | |
2395 | s != (*mr)->get_lma_section_list_end(); | |
2396 | ++s) | |
2397 | if ((*s) == section) | |
2398 | { | |
2399 | (*mr)->set_last_section(section); | |
2400 | return *mr; | |
2401 | } | |
2402 | } | |
2403 | ||
7c61d651 CC |
2404 | if (!explicit_only) |
2405 | { | |
2406 | // Make a note of the first memory region whose attributes | |
2407 | // are compatible with the section. If we do not find an | |
2408 | // explicit region assignment, then we will return this region. | |
2409 | Output_section* out_sec = section->get_output_section(); | |
2410 | if (first_match == NULL | |
2411 | && out_sec != NULL | |
2412 | && (*mr)->attributes_compatible(out_sec->flags(), | |
2413 | out_sec->type())) | |
2414 | first_match = *mr; | |
2415 | } | |
ea5cae92 NC |
2416 | } |
2417 | ||
2418 | // With LMA computations, if an explicit region has not been specified then | |
2419 | // we will want to set the difference between the VMA and the LMA of the | |
2420 | // section were searching for to be the same as the difference between the | |
2421 | // VMA and LMA of the last section to be added to first matched region. | |
2422 | // Hence, if it was asked for, we return a pointer to the last section | |
2423 | // known to be used by the first matched region. | |
2424 | if (first_match != NULL | |
2425 | && previous_section_return != NULL) | |
2426 | *previous_section_return = first_match->get_last_section(); | |
2427 | ||
2428 | return first_match; | |
2429 | } | |
2430 | ||
a445fddf ILT |
2431 | // Set the section address. Note that the OUTPUT_SECTION_ field will |
2432 | // be NULL if no input sections were mapped to this output section. | |
2433 | // We still have to adjust dot and process symbol assignments. | |
2434 | ||
2435 | void | |
2436 | Output_section_definition::set_section_addresses(Symbol_table* symtab, | |
2437 | Layout* layout, | |
fd247bfe | 2438 | uint64_t* dot_value, |
f6973bdc | 2439 | uint64_t* dot_alignment, |
fd247bfe | 2440 | uint64_t* load_address) |
a445fddf | 2441 | { |
ea5cae92 NC |
2442 | Memory_region* vma_region = NULL; |
2443 | Memory_region* lma_region = NULL; | |
2444 | Script_sections* script_sections = | |
2445 | layout->script_options()->script_sections(); | |
a445fddf | 2446 | uint64_t address; |
1e5d2fb1 DK |
2447 | uint64_t old_dot_value = *dot_value; |
2448 | uint64_t old_load_address = *load_address; | |
2449 | ||
9e9143bc | 2450 | // If input section sorting is requested via --section-ordering-file or |
3785f51a | 2451 | // linker plugins, then do it here. This is important because we want |
9e9143bc | 2452 | // any sorting specified in the linker scripts, which will be done after |
3785f51a | 2453 | // this, to take precedence. The final order of input sections is then |
9e9143bc ST |
2454 | // guaranteed to be according to the linker script specification. |
2455 | if (this->output_section_ != NULL | |
2456 | && this->output_section_->input_section_order_specified()) | |
2457 | this->output_section_->sort_attached_input_sections(); | |
2458 | ||
ea5cae92 NC |
2459 | // Decide the start address for the section. The algorithm is: |
2460 | // 1) If an address has been specified in a linker script, use that. | |
2461 | // 2) Otherwise if a memory region has been specified for the section, | |
2462 | // use the next free address in the region. | |
2463 | // 3) Otherwise if memory regions have been specified find the first | |
2464 | // region whose attributes are compatible with this section and | |
2465 | // install it into that region. | |
2466 | // 4) Otherwise use the current location counter. | |
2467 | ||
2468 | if (this->output_section_ != NULL | |
2469 | // Check for --section-start. | |
2470 | && parameters->options().section_start(this->output_section_->name(), | |
2471 | &address)) | |
2472 | ; | |
2473 | else if (this->address_ == NULL) | |
a445fddf | 2474 | { |
7c61d651 | 2475 | vma_region = script_sections->find_memory_region(this, true, false, NULL); |
ea5cae92 NC |
2476 | if (vma_region != NULL) |
2477 | address = vma_region->get_current_address()->eval(symtab, layout, | |
2478 | false); | |
f4187277 | 2479 | else |
ea5cae92 | 2480 | address = *dot_value; |
a445fddf | 2481 | } |
ea5cae92 | 2482 | else |
7c61d651 CC |
2483 | { |
2484 | vma_region = script_sections->find_memory_region(this, true, true, NULL); | |
2485 | address = this->address_->eval_with_dot(symtab, layout, true, | |
2486 | *dot_value, NULL, NULL, | |
2487 | dot_alignment, false); | |
2488 | if (vma_region != NULL) | |
2489 | vma_region->set_address(address, symtab, layout); | |
2490 | } | |
2491 | ||
a445fddf ILT |
2492 | uint64_t align; |
2493 | if (this->align_ == NULL) | |
2494 | { | |
2495 | if (this->output_section_ == NULL) | |
2496 | align = 0; | |
2497 | else | |
2498 | align = this->output_section_->addralign(); | |
2499 | } | |
2500 | else | |
2501 | { | |
77e65537 | 2502 | Output_section* align_section; |
919ed24c | 2503 | align = this->align_->eval_with_dot(symtab, layout, true, *dot_value, |
286adcf4 | 2504 | NULL, &align_section, NULL, false); |
77e65537 ILT |
2505 | if (align_section != NULL) |
2506 | gold_warning(_("alignment of section %s is not absolute"), | |
2507 | this->name_.c_str()); | |
a445fddf ILT |
2508 | if (this->output_section_ != NULL) |
2509 | this->output_section_->set_addralign(align); | |
2510 | } | |
2511 | ||
5d9f66cb CC |
2512 | uint64_t subalign; |
2513 | if (this->subalign_ == NULL) | |
2514 | subalign = 0; | |
2515 | else | |
2516 | { | |
2517 | Output_section* subalign_section; | |
2518 | subalign = this->subalign_->eval_with_dot(symtab, layout, true, | |
2519 | *dot_value, NULL, | |
2520 | &subalign_section, NULL, | |
2521 | false); | |
2522 | if (subalign_section != NULL) | |
2523 | gold_warning(_("subalign of section %s is not absolute"), | |
2524 | this->name_.c_str()); | |
2525 | ||
2526 | // Reserve a value of 0 to mean there is no SUBALIGN property. | |
2527 | if (subalign == 0) | |
2528 | subalign = 1; | |
2529 | ||
2530 | // The external alignment of the output section must be at least | |
2531 | // as large as that of the input sections. If there is no | |
2532 | // explicit ALIGN property, we set the output section alignment | |
2533 | // to match the input section alignment. | |
2534 | if (align < subalign || this->align_ == NULL) | |
2535 | { | |
2536 | align = subalign; | |
2537 | this->output_section_->set_addralign(align); | |
2538 | } | |
2539 | } | |
2540 | ||
a445fddf ILT |
2541 | address = align_address(address, align); |
2542 | ||
fd247bfe ILT |
2543 | uint64_t start_address = address; |
2544 | ||
a445fddf | 2545 | *dot_value = address; |
a445fddf | 2546 | |
1e5d2fb1 DK |
2547 | // Except for NOLOAD sections, the address of non-SHF_ALLOC sections is |
2548 | // forced to zero, regardless of what the linker script wants. | |
a445fddf | 2549 | if (this->output_section_ != NULL |
1e5d2fb1 DK |
2550 | && ((this->output_section_->flags() & elfcpp::SHF_ALLOC) != 0 |
2551 | || this->output_section_->is_noload())) | |
a445fddf ILT |
2552 | this->output_section_->set_address(address); |
2553 | ||
8f2eb564 ILT |
2554 | this->evaluated_address_ = address; |
2555 | this->evaluated_addralign_ = align; | |
2556 | ||
ea5cae92 NC |
2557 | uint64_t laddr; |
2558 | ||
8f2eb564 | 2559 | if (this->load_address_ == NULL) |
ea5cae92 NC |
2560 | { |
2561 | Output_section_definition* previous_section; | |
2562 | ||
2563 | // Determine if an LMA region has been set for this section. | |
7c61d651 | 2564 | lma_region = script_sections->find_memory_region(this, false, false, |
ea5cae92 NC |
2565 | &previous_section); |
2566 | ||
2567 | if (lma_region != NULL) | |
2568 | { | |
2569 | if (previous_section == NULL) | |
2570 | // The LMA address was explicitly set to the given region. | |
2571 | laddr = lma_region->get_current_address()->eval(symtab, layout, | |
2572 | false); | |
3785f51a | 2573 | else |
ea5cae92 NC |
2574 | { |
2575 | // We are not going to use the discovered lma_region, so | |
2576 | // make sure that we do not update it in the code below. | |
2577 | lma_region = NULL; | |
2578 | ||
2579 | if (this->address_ != NULL || previous_section == this) | |
2580 | { | |
2581 | // Either an explicit VMA address has been set, or an | |
2582 | // explicit VMA region has been set, so set the LMA equal to | |
2583 | // the VMA. | |
2584 | laddr = address; | |
2585 | } | |
2586 | else | |
2587 | { | |
2588 | // The LMA address was not explicitly or implicitly set. | |
2589 | // | |
2590 | // We have been given the first memory region that is | |
2591 | // compatible with the current section and a pointer to the | |
2592 | // last section to use this region. Set the LMA of this | |
2593 | // section so that the difference between its' VMA and LMA | |
2594 | // is the same as the difference between the VMA and LMA of | |
2595 | // the last section in the given region. | |
2596 | laddr = address + (previous_section->evaluated_load_address_ | |
2597 | - previous_section->evaluated_address_); | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | if (this->output_section_ != NULL) | |
2602 | this->output_section_->set_load_address(laddr); | |
2603 | } | |
2604 | else | |
2605 | { | |
2606 | // Do not set the load address of the output section, if one exists. | |
2607 | // This allows future sections to determine what the load address | |
2608 | // should be. If none is ever set, it will default to being the | |
2609 | // same as the vma address. | |
2610 | laddr = address; | |
2611 | } | |
2612 | } | |
8f2eb564 | 2613 | else |
a445fddf | 2614 | { |
ea5cae92 NC |
2615 | laddr = this->load_address_->eval_with_dot(symtab, layout, true, |
2616 | *dot_value, | |
2617 | this->output_section_, | |
286adcf4 | 2618 | NULL, NULL, false); |
8f2eb564 | 2619 | if (this->output_section_ != NULL) |
55458500 | 2620 | this->output_section_->set_load_address(laddr); |
a445fddf ILT |
2621 | } |
2622 | ||
ea5cae92 NC |
2623 | this->evaluated_load_address_ = laddr; |
2624 | ||
a445fddf ILT |
2625 | std::string fill; |
2626 | if (this->fill_ != NULL) | |
2627 | { | |
2628 | // FIXME: The GNU linker supports fill values of arbitrary | |
2629 | // length. | |
77e65537 | 2630 | Output_section* fill_section; |
919ed24c | 2631 | uint64_t fill_val = this->fill_->eval_with_dot(symtab, layout, true, |
a445fddf | 2632 | *dot_value, |
f6973bdc | 2633 | NULL, &fill_section, |
286adcf4 | 2634 | NULL, false); |
77e65537 ILT |
2635 | if (fill_section != NULL) |
2636 | gold_warning(_("fill of section %s is not absolute"), | |
2637 | this->name_.c_str()); | |
a445fddf ILT |
2638 | unsigned char fill_buff[4]; |
2639 | elfcpp::Swap_unaligned<32, true>::writeval(fill_buff, fill_val); | |
2640 | fill.assign(reinterpret_cast<char*>(fill_buff), 4); | |
2641 | } | |
2642 | ||
2643 | Input_section_list input_sections; | |
2644 | if (this->output_section_ != NULL) | |
2645 | { | |
2646 | // Get the list of input sections attached to this output | |
2647 | // section. This will leave the output section with only | |
2648 | // Output_section_data entries. | |
2649 | address += this->output_section_->get_input_sections(address, | |
2650 | fill, | |
2651 | &input_sections); | |
2652 | *dot_value = address; | |
2653 | } | |
2654 | ||
77e65537 | 2655 | Output_section* dot_section = this->output_section_; |
a445fddf ILT |
2656 | for (Output_section_elements::iterator p = this->elements_.begin(); |
2657 | p != this->elements_.end(); | |
2658 | ++p) | |
2659 | (*p)->set_section_addresses(symtab, layout, this->output_section_, | |
f6973bdc ILT |
2660 | subalign, dot_value, dot_alignment, |
2661 | &dot_section, &fill, &input_sections); | |
a445fddf ILT |
2662 | |
2663 | gold_assert(input_sections.empty()); | |
fd247bfe | 2664 | |
ea5cae92 NC |
2665 | if (vma_region != NULL) |
2666 | { | |
2667 | // Update the VMA region being used by the section now that we know how | |
2668 | // big it is. Use the current address in the region, rather than | |
2669 | // start_address because that might have been aligned upwards and we | |
2670 | // need to allow for the padding. | |
2671 | Expression* addr = vma_region->get_current_address(); | |
2672 | uint64_t size = *dot_value - addr->eval(symtab, layout, false); | |
2673 | ||
2674 | vma_region->increment_offset(this->get_section_name(), size, | |
2675 | symtab, layout); | |
2676 | } | |
2677 | ||
2678 | // If the LMA region is different from the VMA region, then increment the | |
2679 | // offset there as well. Note that we use the same "dot_value - | |
2680 | // start_address" formula that is used in the load_address assignment below. | |
2681 | if (lma_region != NULL && lma_region != vma_region) | |
2682 | lma_region->increment_offset(this->get_section_name(), | |
2683 | *dot_value - start_address, | |
2684 | symtab, layout); | |
2685 | ||
2686 | // Compute the load address for the following section. | |
2687 | if (this->output_section_ == NULL) | |
fd247bfe | 2688 | *load_address = *dot_value; |
ea5cae92 NC |
2689 | else if (this->load_address_ == NULL) |
2690 | { | |
2691 | if (lma_region == NULL) | |
2692 | *load_address = *dot_value; | |
2693 | else | |
2694 | *load_address = | |
2695 | lma_region->get_current_address()->eval(symtab, layout, false); | |
2696 | } | |
fd247bfe ILT |
2697 | else |
2698 | *load_address = (this->output_section_->load_address() | |
2699 | + (*dot_value - start_address)); | |
2d924fd9 ILT |
2700 | |
2701 | if (this->output_section_ != NULL) | |
2702 | { | |
2703 | if (this->is_relro_) | |
2704 | this->output_section_->set_is_relro(); | |
2705 | else | |
2706 | this->output_section_->clear_is_relro(); | |
1e5d2fb1 DK |
2707 | |
2708 | // If this is a NOLOAD section, keep dot and load address unchanged. | |
2709 | if (this->output_section_->is_noload()) | |
2710 | { | |
2711 | *dot_value = old_dot_value; | |
2712 | *load_address = old_load_address; | |
2713 | } | |
2d924fd9 | 2714 | } |
a445fddf ILT |
2715 | } |
2716 | ||
3802b2dd ILT |
2717 | // Check a constraint (ONLY_IF_RO, etc.) on an output section. If |
2718 | // this section is constrained, and the input sections do not match, | |
2719 | // return the constraint, and set *POSD. | |
2720 | ||
2721 | Section_constraint | |
2722 | Output_section_definition::check_constraint(Output_section_definition** posd) | |
2723 | { | |
2724 | switch (this->constraint_) | |
2725 | { | |
2726 | case CONSTRAINT_NONE: | |
2727 | return CONSTRAINT_NONE; | |
2728 | ||
2729 | case CONSTRAINT_ONLY_IF_RO: | |
2730 | if (this->output_section_ != NULL | |
2731 | && (this->output_section_->flags() & elfcpp::SHF_WRITE) != 0) | |
2732 | { | |
2733 | *posd = this; | |
2734 | return CONSTRAINT_ONLY_IF_RO; | |
2735 | } | |
2736 | return CONSTRAINT_NONE; | |
2737 | ||
2738 | case CONSTRAINT_ONLY_IF_RW: | |
2739 | if (this->output_section_ != NULL | |
2740 | && (this->output_section_->flags() & elfcpp::SHF_WRITE) == 0) | |
2741 | { | |
2742 | *posd = this; | |
2743 | return CONSTRAINT_ONLY_IF_RW; | |
2744 | } | |
2745 | return CONSTRAINT_NONE; | |
2746 | ||
2747 | case CONSTRAINT_SPECIAL: | |
2748 | if (this->output_section_ != NULL) | |
2749 | gold_error(_("SPECIAL constraints are not implemented")); | |
2750 | return CONSTRAINT_NONE; | |
2751 | ||
2752 | default: | |
2753 | gold_unreachable(); | |
2754 | } | |
2755 | } | |
2756 | ||
2757 | // See if this is the alternate output section for a constrained | |
2758 | // output section. If it is, transfer the Output_section and return | |
2759 | // true. Otherwise return false. | |
2760 | ||
2761 | bool | |
2762 | Output_section_definition::alternate_constraint( | |
2763 | Output_section_definition* posd, | |
2764 | Section_constraint constraint) | |
2765 | { | |
2766 | if (this->name_ != posd->name_) | |
2767 | return false; | |
2768 | ||
2769 | switch (constraint) | |
2770 | { | |
2771 | case CONSTRAINT_ONLY_IF_RO: | |
2772 | if (this->constraint_ != CONSTRAINT_ONLY_IF_RW) | |
2773 | return false; | |
2774 | break; | |
2775 | ||
2776 | case CONSTRAINT_ONLY_IF_RW: | |
2777 | if (this->constraint_ != CONSTRAINT_ONLY_IF_RO) | |
2778 | return false; | |
2779 | break; | |
2780 | ||
2781 | default: | |
2782 | gold_unreachable(); | |
2783 | } | |
2784 | ||
2785 | // We have found the alternate constraint. We just need to move | |
2786 | // over the Output_section. When constraints are used properly, | |
2787 | // THIS should not have an output_section pointer, as all the input | |
2788 | // sections should have matched the other definition. | |
2789 | ||
2790 | if (this->output_section_ != NULL) | |
2791 | gold_error(_("mismatched definition for constrained sections")); | |
2792 | ||
2793 | this->output_section_ = posd->output_section_; | |
2794 | posd->output_section_ = NULL; | |
2795 | ||
2d924fd9 ILT |
2796 | if (this->is_relro_) |
2797 | this->output_section_->set_is_relro(); | |
2798 | else | |
2799 | this->output_section_->clear_is_relro(); | |
2800 | ||
3802b2dd ILT |
2801 | return true; |
2802 | } | |
2803 | ||
1c4f3631 | 2804 | // Get the list of segments to use for an allocated section when using |
2cefc357 | 2805 | // a PHDRS clause. |
1c4f3631 ILT |
2806 | |
2807 | Output_section* | |
2cefc357 ILT |
2808 | Output_section_definition::allocate_to_segment(String_list** phdrs_list, |
2809 | bool* orphan) | |
1c4f3631 | 2810 | { |
d103a984 RÁE |
2811 | // Update phdrs_list even if we don't have an output section. It |
2812 | // might be used by the following sections. | |
2813 | if (this->phdrs_ != NULL) | |
2814 | *phdrs_list = this->phdrs_; | |
2815 | ||
1c4f3631 ILT |
2816 | if (this->output_section_ == NULL) |
2817 | return NULL; | |
2818 | if ((this->output_section_->flags() & elfcpp::SHF_ALLOC) == 0) | |
2819 | return NULL; | |
2cefc357 | 2820 | *orphan = false; |
1c4f3631 ILT |
2821 | return this->output_section_; |
2822 | } | |
2823 | ||
8f2eb564 ILT |
2824 | // Look for an output section by name and return the address, the load |
2825 | // address, the alignment, and the size. This is used when an | |
2826 | // expression refers to an output section which was not actually | |
2827 | // created. This returns true if the section was found, false | |
2828 | // otherwise. | |
2829 | ||
2830 | bool | |
2831 | Output_section_definition::get_output_section_info(const char* name, | |
2832 | uint64_t* address, | |
2833 | uint64_t* load_address, | |
2ea97941 | 2834 | uint64_t* addralign, |
8f2eb564 ILT |
2835 | uint64_t* size) const |
2836 | { | |
2837 | if (this->name_ != name) | |
2838 | return false; | |
2839 | ||
2840 | if (this->output_section_ != NULL) | |
2841 | { | |
2842 | *address = this->output_section_->address(); | |
2843 | if (this->output_section_->has_load_address()) | |
2844 | *load_address = this->output_section_->load_address(); | |
2845 | else | |
2846 | *load_address = *address; | |
2ea97941 | 2847 | *addralign = this->output_section_->addralign(); |
8f2eb564 ILT |
2848 | *size = this->output_section_->current_data_size(); |
2849 | } | |
2850 | else | |
2851 | { | |
2852 | *address = this->evaluated_address_; | |
2853 | *load_address = this->evaluated_load_address_; | |
2ea97941 | 2854 | *addralign = this->evaluated_addralign_; |
8f2eb564 ILT |
2855 | *size = 0; |
2856 | } | |
2857 | ||
2858 | return true; | |
2859 | } | |
2860 | ||
494e05f4 ILT |
2861 | // Print for debugging. |
2862 | ||
2863 | void | |
2864 | Output_section_definition::print(FILE* f) const | |
2865 | { | |
2866 | fprintf(f, " %s ", this->name_.c_str()); | |
2867 | ||
2868 | if (this->address_ != NULL) | |
2869 | { | |
2870 | this->address_->print(f); | |
2871 | fprintf(f, " "); | |
2872 | } | |
2873 | ||
1e5d2fb1 DK |
2874 | if (this->script_section_type_ != SCRIPT_SECTION_TYPE_NONE) |
2875 | fprintf(f, "(%s) ", | |
2876 | this->script_section_type_name(this->script_section_type_)); | |
2877 | ||
494e05f4 ILT |
2878 | fprintf(f, ": "); |
2879 | ||
2880 | if (this->load_address_ != NULL) | |
2881 | { | |
2882 | fprintf(f, "AT("); | |
2883 | this->load_address_->print(f); | |
2884 | fprintf(f, ") "); | |
2885 | } | |
2886 | ||
2887 | if (this->align_ != NULL) | |
2888 | { | |
2889 | fprintf(f, "ALIGN("); | |
2890 | this->align_->print(f); | |
2891 | fprintf(f, ") "); | |
2892 | } | |
2893 | ||
2894 | if (this->subalign_ != NULL) | |
2895 | { | |
2896 | fprintf(f, "SUBALIGN("); | |
2897 | this->subalign_->print(f); | |
2898 | fprintf(f, ") "); | |
2899 | } | |
2900 | ||
2901 | fprintf(f, "{\n"); | |
2902 | ||
2903 | for (Output_section_elements::const_iterator p = this->elements_.begin(); | |
2904 | p != this->elements_.end(); | |
2905 | ++p) | |
2906 | (*p)->print(f); | |
2907 | ||
2908 | fprintf(f, " }"); | |
2909 | ||
2910 | if (this->fill_ != NULL) | |
2911 | { | |
2912 | fprintf(f, " = "); | |
2913 | this->fill_->print(f); | |
2914 | } | |
2915 | ||
7d26c6cc ILT |
2916 | if (this->phdrs_ != NULL) |
2917 | { | |
2918 | for (String_list::const_iterator p = this->phdrs_->begin(); | |
2919 | p != this->phdrs_->end(); | |
2920 | ++p) | |
2921 | fprintf(f, " :%s", p->c_str()); | |
2922 | } | |
2923 | ||
494e05f4 ILT |
2924 | fprintf(f, "\n"); |
2925 | } | |
2926 | ||
1e5d2fb1 DK |
2927 | Script_sections::Section_type |
2928 | Output_section_definition::section_type() const | |
2929 | { | |
2930 | switch (this->script_section_type_) | |
2931 | { | |
2932 | case SCRIPT_SECTION_TYPE_NONE: | |
2933 | return Script_sections::ST_NONE; | |
2934 | case SCRIPT_SECTION_TYPE_NOLOAD: | |
2935 | return Script_sections::ST_NOLOAD; | |
2936 | case SCRIPT_SECTION_TYPE_COPY: | |
2937 | case SCRIPT_SECTION_TYPE_DSECT: | |
2938 | case SCRIPT_SECTION_TYPE_INFO: | |
2939 | case SCRIPT_SECTION_TYPE_OVERLAY: | |
2940 | // There are not really support so we treat them as ST_NONE. The | |
2941 | // parse should have issued errors for them already. | |
2942 | return Script_sections::ST_NONE; | |
2943 | default: | |
2944 | gold_unreachable(); | |
2945 | } | |
2946 | } | |
2947 | ||
2948 | // Return the name of a script section type. | |
2949 | ||
2950 | const char* | |
ca09d69a | 2951 | Output_section_definition::script_section_type_name( |
1e5d2fb1 DK |
2952 | Script_section_type script_section_type) |
2953 | { | |
2954 | switch (script_section_type) | |
2955 | { | |
2956 | case SCRIPT_SECTION_TYPE_NONE: | |
2957 | return "NONE"; | |
2958 | case SCRIPT_SECTION_TYPE_NOLOAD: | |
2959 | return "NOLOAD"; | |
2960 | case SCRIPT_SECTION_TYPE_DSECT: | |
2961 | return "DSECT"; | |
2962 | case SCRIPT_SECTION_TYPE_COPY: | |
2963 | return "COPY"; | |
2964 | case SCRIPT_SECTION_TYPE_INFO: | |
2965 | return "INFO"; | |
2966 | case SCRIPT_SECTION_TYPE_OVERLAY: | |
2967 | return "OVERLAY"; | |
2968 | default: | |
2969 | gold_unreachable(); | |
2970 | } | |
2971 | } | |
2972 | ||
7f8cd844 NC |
2973 | void |
2974 | Output_section_definition::set_memory_region(Memory_region* mr, bool set_vma) | |
2975 | { | |
2976 | gold_assert(mr != NULL); | |
2977 | // Add the current section to the specified region's list. | |
2978 | mr->add_section(this, set_vma); | |
2979 | } | |
2980 | ||
a445fddf ILT |
2981 | // An output section created to hold orphaned input sections. These |
2982 | // do not actually appear in linker scripts. However, for convenience | |
2983 | // when setting the output section addresses, we put a marker to these | |
2984 | // sections in the appropriate place in the list of SECTIONS elements. | |
2985 | ||
2986 | class Orphan_output_section : public Sections_element | |
2987 | { | |
2988 | public: | |
2989 | Orphan_output_section(Output_section* os) | |
2990 | : os_(os) | |
2991 | { } | |
2992 | ||
0d371ad3 ILT |
2993 | // Return whether the orphan output section is relro. We can just |
2994 | // check the output section because we always set the flag, if | |
2995 | // needed, just after we create the Orphan_output_section. | |
a445fddf | 2996 | bool |
0d371ad3 ILT |
2997 | is_relro() const |
2998 | { return this->os_->is_relro(); } | |
2999 | ||
3000 | // Initialize OSP with an output section. This should have been | |
3001 | // done already. | |
3002 | void | |
3003 | orphan_section_init(Orphan_section_placement*, | |
3004 | Script_sections::Elements_iterator) | |
3005 | { gold_unreachable(); } | |
a445fddf ILT |
3006 | |
3007 | // Set section addresses. | |
3008 | void | |
f6973bdc ILT |
3009 | set_section_addresses(Symbol_table*, Layout*, uint64_t*, uint64_t*, |
3010 | uint64_t*); | |
a445fddf | 3011 | |
1c4f3631 | 3012 | // Get the list of segments to use for an allocated section when |
2cefc357 | 3013 | // using a PHDRS clause. |
1c4f3631 | 3014 | Output_section* |
2cefc357 | 3015 | allocate_to_segment(String_list**, bool*); |
1c4f3631 | 3016 | |
2d924fd9 ILT |
3017 | // Return the associated Output_section. |
3018 | Output_section* | |
3019 | get_output_section() const | |
3020 | { return this->os_; } | |
3021 | ||
a445fddf ILT |
3022 | // Print for debugging. |
3023 | void | |
3024 | print(FILE* f) const | |
3025 | { | |
3026 | fprintf(f, " marker for orphaned output section %s\n", | |
3027 | this->os_->name()); | |
3028 | } | |
3029 | ||
3030 | private: | |
3031 | Output_section* os_; | |
3032 | }; | |
3033 | ||
a445fddf ILT |
3034 | // Set section addresses. |
3035 | ||
3036 | void | |
3037 | Orphan_output_section::set_section_addresses(Symbol_table*, Layout*, | |
fd247bfe | 3038 | uint64_t* dot_value, |
f6973bdc | 3039 | uint64_t*, |
fd247bfe | 3040 | uint64_t* load_address) |
a445fddf | 3041 | { |
6625d24e | 3042 | typedef std::list<Output_section::Input_section> Input_section_list; |
a445fddf | 3043 | |
fd247bfe ILT |
3044 | bool have_load_address = *load_address != *dot_value; |
3045 | ||
a445fddf ILT |
3046 | uint64_t address = *dot_value; |
3047 | address = align_address(address, this->os_->addralign()); | |
3048 | ||
9e9143bc | 3049 | // If input section sorting is requested via --section-ordering-file or |
3785f51a | 3050 | // linker plugins, then do it here. This is important because we want |
9e9143bc | 3051 | // any sorting specified in the linker scripts, which will be done after |
3785f51a | 3052 | // this, to take precedence. The final order of input sections is then |
9e9143bc ST |
3053 | // guaranteed to be according to the linker script specification. |
3054 | if (this->os_ != NULL | |
3055 | && this->os_->input_section_order_specified()) | |
3056 | this->os_->sort_attached_input_sections(); | |
3057 | ||
a94907d9 ILT |
3058 | // For a relocatable link, all orphan sections are put at |
3059 | // address 0. In general we expect all sections to be at | |
3060 | // address 0 for a relocatable link, but we permit the linker | |
3061 | // script to override that for specific output sections. | |
3062 | if (parameters->options().relocatable()) | |
3063 | { | |
3064 | address = 0; | |
3065 | *load_address = 0; | |
3066 | have_load_address = false; | |
3067 | } | |
3068 | ||
a445fddf | 3069 | if ((this->os_->flags() & elfcpp::SHF_ALLOC) != 0) |
fd247bfe ILT |
3070 | { |
3071 | this->os_->set_address(address); | |
3072 | if (have_load_address) | |
3073 | this->os_->set_load_address(align_address(*load_address, | |
3074 | this->os_->addralign())); | |
3075 | } | |
a445fddf ILT |
3076 | |
3077 | Input_section_list input_sections; | |
3078 | address += this->os_->get_input_sections(address, "", &input_sections); | |
3079 | ||
3080 | for (Input_section_list::iterator p = input_sections.begin(); | |
3081 | p != input_sections.end(); | |
3082 | ++p) | |
3083 | { | |
6625d24e DK |
3084 | uint64_t addralign = p->addralign(); |
3085 | if (!p->is_input_section()) | |
3785f51a | 3086 | p->output_section_data()->finalize_data_size(); |
6625d24e | 3087 | uint64_t size = p->data_size(); |
2ea97941 | 3088 | address = align_address(address, addralign); |
6625d24e | 3089 | this->os_->add_script_input_section(*p); |
a445fddf ILT |
3090 | address += size; |
3091 | } | |
3092 | ||
2199fbe7 CC |
3093 | if (parameters->options().relocatable()) |
3094 | { | |
3095 | // For a relocatable link, reset DOT_VALUE to 0. | |
3096 | *dot_value = 0; | |
3097 | *load_address = 0; | |
3098 | } | |
3099 | else if (this->os_ == NULL | |
3100 | || (this->os_->flags() & elfcpp::SHF_TLS) == 0 | |
3101 | || this->os_->type() != elfcpp::SHT_NOBITS) | |
661be1e2 | 3102 | { |
2199fbe7 | 3103 | // An SHF_TLS/SHT_NOBITS section does not take up any address space. |
661be1e2 ILT |
3104 | if (!have_load_address) |
3105 | *load_address = address; | |
3106 | else | |
3107 | *load_address += address - *dot_value; | |
fd247bfe | 3108 | |
661be1e2 ILT |
3109 | *dot_value = address; |
3110 | } | |
a445fddf ILT |
3111 | } |
3112 | ||
1c4f3631 ILT |
3113 | // Get the list of segments to use for an allocated section when using |
3114 | // a PHDRS clause. If this is an allocated section, return the | |
3115 | // Output_section. We don't change the list of segments. | |
3116 | ||
3117 | Output_section* | |
2cefc357 | 3118 | Orphan_output_section::allocate_to_segment(String_list**, bool* orphan) |
1c4f3631 ILT |
3119 | { |
3120 | if ((this->os_->flags() & elfcpp::SHF_ALLOC) == 0) | |
3121 | return NULL; | |
2cefc357 | 3122 | *orphan = true; |
1c4f3631 ILT |
3123 | return this->os_; |
3124 | } | |
3125 | ||
3126 | // Class Phdrs_element. A program header from a PHDRS clause. | |
3127 | ||
3128 | class Phdrs_element | |
3129 | { | |
3130 | public: | |
2ea97941 ILT |
3131 | Phdrs_element(const char* name, size_t namelen, unsigned int type, |
3132 | bool includes_filehdr, bool includes_phdrs, | |
1c4f3631 | 3133 | bool is_flags_valid, unsigned int flags, |
2ea97941 ILT |
3134 | Expression* load_address) |
3135 | : name_(name, namelen), type_(type), includes_filehdr_(includes_filehdr), | |
3136 | includes_phdrs_(includes_phdrs), is_flags_valid_(is_flags_valid), | |
3137 | flags_(flags), load_address_(load_address), load_address_value_(0), | |
1c4f3631 ILT |
3138 | segment_(NULL) |
3139 | { } | |
3140 | ||
3141 | // Return the name of this segment. | |
3142 | const std::string& | |
3143 | name() const | |
3144 | { return this->name_; } | |
3145 | ||
3146 | // Return the type of the segment. | |
3147 | unsigned int | |
3148 | type() const | |
3149 | { return this->type_; } | |
3150 | ||
3151 | // Whether to include the file header. | |
3152 | bool | |
3153 | includes_filehdr() const | |
3154 | { return this->includes_filehdr_; } | |
3155 | ||
3156 | // Whether to include the program headers. | |
3157 | bool | |
3158 | includes_phdrs() const | |
3159 | { return this->includes_phdrs_; } | |
3160 | ||
3161 | // Return whether there is a load address. | |
3162 | bool | |
3163 | has_load_address() const | |
3164 | { return this->load_address_ != NULL; } | |
3165 | ||
3166 | // Evaluate the load address expression if there is one. | |
3167 | void | |
2ea97941 | 3168 | eval_load_address(Symbol_table* symtab, Layout* layout) |
1c4f3631 ILT |
3169 | { |
3170 | if (this->load_address_ != NULL) | |
2ea97941 | 3171 | this->load_address_value_ = this->load_address_->eval(symtab, layout, |
919ed24c | 3172 | true); |
1c4f3631 ILT |
3173 | } |
3174 | ||
3175 | // Return the load address. | |
3176 | uint64_t | |
3177 | load_address() const | |
3178 | { | |
3179 | gold_assert(this->load_address_ != NULL); | |
3180 | return this->load_address_value_; | |
3181 | } | |
3182 | ||
3183 | // Create the segment. | |
3184 | Output_segment* | |
3185 | create_segment(Layout* layout) | |
3186 | { | |
3187 | this->segment_ = layout->make_output_segment(this->type_, this->flags_); | |
3188 | return this->segment_; | |
3189 | } | |
3190 | ||
3191 | // Return the segment. | |
3192 | Output_segment* | |
3193 | segment() | |
3194 | { return this->segment_; } | |
3195 | ||
20e6d0d6 DK |
3196 | // Release the segment. |
3197 | void | |
3198 | release_segment() | |
3199 | { this->segment_ = NULL; } | |
3200 | ||
1c4f3631 ILT |
3201 | // Set the segment flags if appropriate. |
3202 | void | |
3203 | set_flags_if_valid() | |
3204 | { | |
3205 | if (this->is_flags_valid_) | |
3206 | this->segment_->set_flags(this->flags_); | |
3207 | } | |
3208 | ||
7d26c6cc ILT |
3209 | // Print for debugging. |
3210 | void | |
3211 | print(FILE*) const; | |
3212 | ||
1c4f3631 ILT |
3213 | private: |
3214 | // The name used in the script. | |
3215 | std::string name_; | |
3216 | // The type of the segment (PT_LOAD, etc.). | |
3217 | unsigned int type_; | |
3218 | // Whether this segment includes the file header. | |
3219 | bool includes_filehdr_; | |
3220 | // Whether this segment includes the section headers. | |
3221 | bool includes_phdrs_; | |
3222 | // Whether the flags were explicitly specified. | |
3223 | bool is_flags_valid_; | |
3224 | // The flags for this segment (PF_R, etc.) if specified. | |
3225 | unsigned int flags_; | |
3226 | // The expression for the load address for this segment. This may | |
3227 | // be NULL. | |
3228 | Expression* load_address_; | |
3229 | // The actual load address from evaluating the expression. | |
3230 | uint64_t load_address_value_; | |
3231 | // The segment itself. | |
3232 | Output_segment* segment_; | |
3233 | }; | |
3234 | ||
7d26c6cc ILT |
3235 | // Print for debugging. |
3236 | ||
3237 | void | |
3238 | Phdrs_element::print(FILE* f) const | |
3239 | { | |
3240 | fprintf(f, " %s 0x%x", this->name_.c_str(), this->type_); | |
3241 | if (this->includes_filehdr_) | |
3242 | fprintf(f, " FILEHDR"); | |
3243 | if (this->includes_phdrs_) | |
3244 | fprintf(f, " PHDRS"); | |
3245 | if (this->is_flags_valid_) | |
3246 | fprintf(f, " FLAGS(%u)", this->flags_); | |
3247 | if (this->load_address_ != NULL) | |
3248 | { | |
3249 | fprintf(f, " AT("); | |
3250 | this->load_address_->print(f); | |
3251 | fprintf(f, ")"); | |
3252 | } | |
3253 | fprintf(f, ";\n"); | |
3254 | } | |
3255 | ||
7f8cd844 NC |
3256 | // Add a memory region. |
3257 | ||
3258 | void | |
3259 | Script_sections::add_memory_region(const char* name, size_t namelen, | |
3260 | unsigned int attributes, | |
3261 | Expression* start, Expression* length) | |
3262 | { | |
3263 | if (this->memory_regions_ == NULL) | |
3264 | this->memory_regions_ = new Memory_regions(); | |
3265 | else if (this->find_memory_region(name, namelen)) | |
3266 | { | |
ea5cae92 | 3267 | gold_error(_("region '%.*s' already defined"), static_cast<int>(namelen), |
33dbc701 | 3268 | name); |
7f8cd844 NC |
3269 | // FIXME: Add a GOLD extension to allow multiple regions with the same |
3270 | // name. This would amount to a single region covering disjoint blocks | |
3271 | // of memory, which is useful for embedded devices. | |
3272 | } | |
3273 | ||
3274 | // FIXME: Check the length and start values. Currently we allow | |
3275 | // non-constant expressions for these values, whereas LD does not. | |
3276 | ||
3277 | // FIXME: Add a GOLD extension to allow NEGATIVE LENGTHS. This would | |
3278 | // describe a region that packs from the end address going down, rather | |
3279 | // than the start address going up. This would be useful for embedded | |
3280 | // devices. | |
3281 | ||
3282 | this->memory_regions_->push_back(new Memory_region(name, namelen, attributes, | |
3283 | start, length)); | |
3284 | } | |
3285 | ||
3286 | // Find a memory region. | |
3287 | ||
3288 | Memory_region* | |
3289 | Script_sections::find_memory_region(const char* name, size_t namelen) | |
3290 | { | |
3291 | if (this->memory_regions_ == NULL) | |
3292 | return NULL; | |
3293 | ||
3294 | for (Memory_regions::const_iterator m = this->memory_regions_->begin(); | |
3295 | m != this->memory_regions_->end(); | |
3296 | ++m) | |
3297 | if ((*m)->name_match(name, namelen)) | |
3298 | return *m; | |
3299 | ||
3300 | return NULL; | |
3301 | } | |
3302 | ||
3303 | // Find a memory region's origin. | |
3304 | ||
3305 | Expression* | |
3306 | Script_sections::find_memory_region_origin(const char* name, size_t namelen) | |
3307 | { | |
3308 | Memory_region* mr = find_memory_region(name, namelen); | |
3309 | if (mr == NULL) | |
3310 | return NULL; | |
3311 | ||
3312 | return mr->start_address(); | |
3313 | } | |
3314 | ||
3315 | // Find a memory region's length. | |
3316 | ||
3317 | Expression* | |
3318 | Script_sections::find_memory_region_length(const char* name, size_t namelen) | |
3319 | { | |
3320 | Memory_region* mr = find_memory_region(name, namelen); | |
3321 | if (mr == NULL) | |
3322 | return NULL; | |
3323 | ||
3324 | return mr->length(); | |
3325 | } | |
3326 | ||
3327 | // Set the memory region to use for the current section. | |
3328 | ||
3329 | void | |
3330 | Script_sections::set_memory_region(Memory_region* mr, bool set_vma) | |
3331 | { | |
3332 | gold_assert(!this->sections_elements_->empty()); | |
3333 | this->sections_elements_->back()->set_memory_region(mr, set_vma); | |
3334 | } | |
3335 | ||
494e05f4 ILT |
3336 | // Class Script_sections. |
3337 | ||
3338 | Script_sections::Script_sections() | |
3339 | : saw_sections_clause_(false), | |
3340 | in_sections_clause_(false), | |
3341 | sections_elements_(NULL), | |
1c4f3631 | 3342 | output_section_(NULL), |
7f8cd844 | 3343 | memory_regions_(NULL), |
2d924fd9 | 3344 | phdrs_elements_(NULL), |
0d371ad3 ILT |
3345 | orphan_section_placement_(NULL), |
3346 | data_segment_align_start_(), | |
3347 | saw_data_segment_align_(false), | |
3c12dcdb | 3348 | saw_relro_end_(false), |
8086551f CC |
3349 | saw_segment_start_expression_(false), |
3350 | segments_created_(false) | |
494e05f4 ILT |
3351 | { |
3352 | } | |
3353 | ||
3354 | // Start a SECTIONS clause. | |
3355 | ||
3356 | void | |
3357 | Script_sections::start_sections() | |
3358 | { | |
3359 | gold_assert(!this->in_sections_clause_ && this->output_section_ == NULL); | |
3360 | this->saw_sections_clause_ = true; | |
3361 | this->in_sections_clause_ = true; | |
3362 | if (this->sections_elements_ == NULL) | |
3363 | this->sections_elements_ = new Sections_elements; | |
3364 | } | |
3365 | ||
3366 | // Finish a SECTIONS clause. | |
3367 | ||
3368 | void | |
3369 | Script_sections::finish_sections() | |
3370 | { | |
3371 | gold_assert(this->in_sections_clause_ && this->output_section_ == NULL); | |
3372 | this->in_sections_clause_ = false; | |
3373 | } | |
3374 | ||
3375 | // Add a symbol to be defined. | |
3376 | ||
3377 | void | |
3378 | Script_sections::add_symbol_assignment(const char* name, size_t length, | |
3379 | Expression* val, bool provide, | |
3380 | bool hidden) | |
3381 | { | |
3382 | if (this->output_section_ != NULL) | |
3383 | this->output_section_->add_symbol_assignment(name, length, val, | |
3384 | provide, hidden); | |
3385 | else | |
3386 | { | |
3387 | Sections_element* p = new Sections_element_assignment(name, length, | |
3388 | val, provide, | |
3389 | hidden); | |
3390 | this->sections_elements_->push_back(p); | |
3391 | } | |
3392 | } | |
3393 | ||
a445fddf ILT |
3394 | // Add an assignment to the special dot symbol. |
3395 | ||
3396 | void | |
3397 | Script_sections::add_dot_assignment(Expression* val) | |
3398 | { | |
3399 | if (this->output_section_ != NULL) | |
3400 | this->output_section_->add_dot_assignment(val); | |
3401 | else | |
3402 | { | |
12edd763 ILT |
3403 | // The GNU linker permits assignments to . to appears outside of |
3404 | // a SECTIONS clause, and treats it as appearing inside, so | |
3405 | // sections_elements_ may be NULL here. | |
3406 | if (this->sections_elements_ == NULL) | |
3407 | { | |
3408 | this->sections_elements_ = new Sections_elements; | |
3409 | this->saw_sections_clause_ = true; | |
3410 | } | |
3411 | ||
a445fddf ILT |
3412 | Sections_element* p = new Sections_element_dot_assignment(val); |
3413 | this->sections_elements_->push_back(p); | |
3414 | } | |
3415 | } | |
3416 | ||
494e05f4 ILT |
3417 | // Add an assertion. |
3418 | ||
3419 | void | |
3420 | Script_sections::add_assertion(Expression* check, const char* message, | |
3421 | size_t messagelen) | |
3422 | { | |
3423 | if (this->output_section_ != NULL) | |
3424 | this->output_section_->add_assertion(check, message, messagelen); | |
3425 | else | |
3426 | { | |
3427 | Sections_element* p = new Sections_element_assertion(check, message, | |
3428 | messagelen); | |
3429 | this->sections_elements_->push_back(p); | |
3430 | } | |
3431 | } | |
3432 | ||
3433 | // Start processing entries for an output section. | |
3434 | ||
3435 | void | |
3436 | Script_sections::start_output_section( | |
3437 | const char* name, | |
3438 | size_t namelen, | |
ca09d69a | 3439 | const Parser_output_section_header* header) |
494e05f4 ILT |
3440 | { |
3441 | Output_section_definition* posd = new Output_section_definition(name, | |
3442 | namelen, | |
3443 | header); | |
3444 | this->sections_elements_->push_back(posd); | |
3445 | gold_assert(this->output_section_ == NULL); | |
3446 | this->output_section_ = posd; | |
3447 | } | |
3448 | ||
3449 | // Stop processing entries for an output section. | |
3450 | ||
3451 | void | |
3452 | Script_sections::finish_output_section( | |
3453 | const Parser_output_section_trailer* trailer) | |
3454 | { | |
3455 | gold_assert(this->output_section_ != NULL); | |
3456 | this->output_section_->finish(trailer); | |
3457 | this->output_section_ = NULL; | |
3458 | } | |
3459 | ||
3460 | // Add a data item to the current output section. | |
3461 | ||
3462 | void | |
3463 | Script_sections::add_data(int size, bool is_signed, Expression* val) | |
3464 | { | |
3465 | gold_assert(this->output_section_ != NULL); | |
3466 | this->output_section_->add_data(size, is_signed, val); | |
3467 | } | |
3468 | ||
3469 | // Add a fill value setting to the current output section. | |
3470 | ||
3471 | void | |
3472 | Script_sections::add_fill(Expression* val) | |
3473 | { | |
3474 | gold_assert(this->output_section_ != NULL); | |
3475 | this->output_section_->add_fill(val); | |
3476 | } | |
3477 | ||
3478 | // Add an input section specification to the current output section. | |
3479 | ||
3480 | void | |
3481 | Script_sections::add_input_section(const Input_section_spec* spec, bool keep) | |
3482 | { | |
3483 | gold_assert(this->output_section_ != NULL); | |
3484 | this->output_section_->add_input_section(spec, keep); | |
3485 | } | |
3486 | ||
2d924fd9 ILT |
3487 | // This is called when we see DATA_SEGMENT_ALIGN. It means that any |
3488 | // subsequent output sections may be relro. | |
3489 | ||
3490 | void | |
3491 | Script_sections::data_segment_align() | |
3492 | { | |
0d371ad3 | 3493 | if (this->saw_data_segment_align_) |
2d924fd9 | 3494 | gold_error(_("DATA_SEGMENT_ALIGN may only appear once in a linker script")); |
0d371ad3 ILT |
3495 | gold_assert(!this->sections_elements_->empty()); |
3496 | Sections_elements::iterator p = this->sections_elements_->end(); | |
3497 | --p; | |
3498 | this->data_segment_align_start_ = p; | |
3499 | this->saw_data_segment_align_ = true; | |
2d924fd9 ILT |
3500 | } |
3501 | ||
3502 | // This is called when we see DATA_SEGMENT_RELRO_END. It means that | |
3503 | // any output sections seen since DATA_SEGMENT_ALIGN are relro. | |
3504 | ||
3505 | void | |
3506 | Script_sections::data_segment_relro_end() | |
3507 | { | |
3508 | if (this->saw_relro_end_) | |
3509 | gold_error(_("DATA_SEGMENT_RELRO_END may only appear once " | |
3510 | "in a linker script")); | |
3511 | this->saw_relro_end_ = true; | |
3512 | ||
0d371ad3 | 3513 | if (!this->saw_data_segment_align_) |
2d924fd9 ILT |
3514 | gold_error(_("DATA_SEGMENT_RELRO_END must follow DATA_SEGMENT_ALIGN")); |
3515 | else | |
3516 | { | |
0d371ad3 ILT |
3517 | Sections_elements::iterator p = this->data_segment_align_start_; |
3518 | for (++p; p != this->sections_elements_->end(); ++p) | |
3519 | (*p)->set_is_relro(); | |
2d924fd9 ILT |
3520 | } |
3521 | } | |
3522 | ||
919ed24c ILT |
3523 | // Create any required sections. |
3524 | ||
3525 | void | |
3526 | Script_sections::create_sections(Layout* layout) | |
3527 | { | |
3528 | if (!this->saw_sections_clause_) | |
3529 | return; | |
3530 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3531 | p != this->sections_elements_->end(); | |
3532 | ++p) | |
3533 | (*p)->create_sections(layout); | |
3534 | } | |
3535 | ||
a445fddf ILT |
3536 | // Add any symbols we are defining to the symbol table. |
3537 | ||
3538 | void | |
3539 | Script_sections::add_symbols_to_table(Symbol_table* symtab) | |
3540 | { | |
3541 | if (!this->saw_sections_clause_) | |
3542 | return; | |
3543 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3544 | p != this->sections_elements_->end(); | |
3545 | ++p) | |
3546 | (*p)->add_symbols_to_table(symtab); | |
3547 | } | |
3548 | ||
3549 | // Finalize symbols and check assertions. | |
3550 | ||
3551 | void | |
3552 | Script_sections::finalize_symbols(Symbol_table* symtab, const Layout* layout) | |
3553 | { | |
3554 | if (!this->saw_sections_clause_) | |
3555 | return; | |
a445fddf ILT |
3556 | uint64_t dot_value = 0; |
3557 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3558 | p != this->sections_elements_->end(); | |
3559 | ++p) | |
77e65537 | 3560 | (*p)->finalize_symbols(symtab, layout, &dot_value); |
a445fddf ILT |
3561 | } |
3562 | ||
3563 | // Return the name of the output section to use for an input file name | |
3564 | // and section name. | |
3565 | ||
3566 | const char* | |
1e5d2fb1 DK |
3567 | Script_sections::output_section_name( |
3568 | const char* file_name, | |
3569 | const char* section_name, | |
3570 | Output_section*** output_section_slot, | |
b9b2ae8b | 3571 | Script_sections::Section_type* psection_type, |
412ffd83 CC |
3572 | bool* keep, |
3573 | bool is_input_section) | |
a445fddf ILT |
3574 | { |
3575 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3576 | p != this->sections_elements_->end(); | |
3577 | ++p) | |
3578 | { | |
3579 | const char* ret = (*p)->output_section_name(file_name, section_name, | |
1e5d2fb1 | 3580 | output_section_slot, |
412ffd83 CC |
3581 | psection_type, keep, |
3582 | is_input_section); | |
a445fddf ILT |
3583 | |
3584 | if (ret != NULL) | |
3585 | { | |
3586 | // The special name /DISCARD/ means that the input section | |
3587 | // should be discarded. | |
3588 | if (strcmp(ret, "/DISCARD/") == 0) | |
3589 | { | |
3590 | *output_section_slot = NULL; | |
1e5d2fb1 | 3591 | *psection_type = Script_sections::ST_NONE; |
a445fddf ILT |
3592 | return NULL; |
3593 | } | |
3594 | return ret; | |
3595 | } | |
3596 | } | |
3597 | ||
591be3e4 | 3598 | // We have an orphan section. |
a445fddf | 3599 | *output_section_slot = NULL; |
1e5d2fb1 | 3600 | *psection_type = Script_sections::ST_NONE; |
397b8d2a | 3601 | *keep = false; |
a445fddf | 3602 | |
591be3e4 CC |
3603 | General_options::Orphan_handling orphan_handling = |
3604 | parameters->options().orphan_handling_enum(); | |
3605 | if (orphan_handling == General_options::ORPHAN_DISCARD) | |
3606 | return NULL; | |
3607 | if (orphan_handling == General_options::ORPHAN_ERROR) | |
3608 | { | |
3609 | if (file_name == NULL) | |
3610 | gold_error(_("unplaced orphan section '%s'"), section_name); | |
3611 | else | |
3612 | gold_error(_("unplaced orphan section '%s' from '%s'"), | |
3613 | section_name, file_name); | |
3614 | return NULL; | |
3615 | } | |
3616 | if (orphan_handling == General_options::ORPHAN_WARN) | |
3617 | { | |
3618 | if (file_name == NULL) | |
3619 | gold_warning(_("orphan section '%s' is being placed in section '%s'"), | |
3620 | section_name, section_name); | |
3621 | else | |
3622 | gold_warning(_("orphan section '%s' from '%s' is being placed " | |
3623 | "in section '%s'"), | |
3624 | section_name, file_name, section_name); | |
3625 | } | |
3626 | ||
3627 | // If we couldn't find a mapping for the name, the output section | |
3628 | // gets the name of the input section. | |
a445fddf ILT |
3629 | return section_name; |
3630 | } | |
3631 | ||
3632 | // Place a marker for an orphan output section into the SECTIONS | |
3633 | // clause. | |
3634 | ||
3635 | void | |
3636 | Script_sections::place_orphan(Output_section* os) | |
3637 | { | |
0d371ad3 ILT |
3638 | Orphan_section_placement* osp = this->orphan_section_placement_; |
3639 | if (osp == NULL) | |
a445fddf | 3640 | { |
0d371ad3 ILT |
3641 | // Initialize the Orphan_section_placement structure. |
3642 | osp = new Orphan_section_placement(); | |
3643 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3644 | p != this->sections_elements_->end(); | |
3645 | ++p) | |
3646 | (*p)->orphan_section_init(osp, p); | |
3647 | gold_assert(!this->sections_elements_->empty()); | |
3648 | Sections_elements::iterator last = this->sections_elements_->end(); | |
3649 | --last; | |
3650 | osp->last_init(last); | |
3651 | this->orphan_section_placement_ = osp; | |
a445fddf ILT |
3652 | } |
3653 | ||
0d371ad3 | 3654 | Orphan_output_section* orphan = new Orphan_output_section(os); |
2d924fd9 | 3655 | |
0d371ad3 ILT |
3656 | // Look for where to put ORPHAN. |
3657 | Sections_elements::iterator* where; | |
3658 | if (osp->find_place(os, &where)) | |
3659 | { | |
3660 | if ((**where)->is_relro()) | |
3661 | os->set_is_relro(); | |
3662 | else | |
3663 | os->clear_is_relro(); | |
3664 | ||
3665 | // We want to insert ORPHAN after *WHERE, and then update *WHERE | |
3666 | // so that the next one goes after this one. | |
3667 | Sections_elements::iterator p = *where; | |
3668 | gold_assert(p != this->sections_elements_->end()); | |
3669 | ++p; | |
3670 | *where = this->sections_elements_->insert(p, orphan); | |
3671 | } | |
2d924fd9 | 3672 | else |
0d371ad3 ILT |
3673 | { |
3674 | os->clear_is_relro(); | |
3675 | // We don't have a place to put this orphan section. Put it, | |
3676 | // and all other sections like it, at the end, but before the | |
3677 | // sections which always come at the end. | |
3678 | Sections_elements::iterator last = osp->last_place(); | |
3679 | *where = this->sections_elements_->insert(last, orphan); | |
3680 | } | |
d81222d3 CC |
3681 | |
3682 | if ((os->flags() & elfcpp::SHF_ALLOC) != 0) | |
3683 | osp->update_last_alloc(*where); | |
a445fddf ILT |
3684 | } |
3685 | ||
3686 | // Set the addresses of all the output sections. Walk through all the | |
3687 | // elements, tracking the dot symbol. Apply assignments which set | |
3688 | // absolute symbol values, in case they are used when setting dot. | |
3689 | // Fill in data statement values. As we find output sections, set the | |
3690 | // address, set the address of all associated input sections, and | |
3691 | // update dot. Return the segment which should hold the file header | |
3692 | // and segment headers, if any. | |
3693 | ||
3694 | Output_segment* | |
3695 | Script_sections::set_section_addresses(Symbol_table* symtab, Layout* layout) | |
3696 | { | |
3697 | gold_assert(this->saw_sections_clause_); | |
3785f51a | 3698 | |
3802b2dd ILT |
3699 | // Implement ONLY_IF_RO/ONLY_IF_RW constraints. These are a pain |
3700 | // for our representation. | |
3701 | for (Sections_elements::iterator p = this->sections_elements_->begin(); | |
3702 | p != this->sections_elements_->end(); | |
3703 | ++p) | |
3704 | { | |
3705 | Output_section_definition* posd; | |
3706 | Section_constraint failed_constraint = (*p)->check_constraint(&posd); | |
3707 | if (failed_constraint != CONSTRAINT_NONE) | |
3708 | { | |
3709 | Sections_elements::iterator q; | |
3710 | for (q = this->sections_elements_->begin(); | |
3711 | q != this->sections_elements_->end(); | |
3712 | ++q) | |
3713 | { | |
3714 | if (q != p) | |
3715 | { | |
3716 | if ((*q)->alternate_constraint(posd, failed_constraint)) | |
3717 | break; | |
3718 | } | |
3719 | } | |
3720 | ||
3721 | if (q == this->sections_elements_->end()) | |
3722 | gold_error(_("no matching section constraint")); | |
3723 | } | |
3724 | } | |
3725 | ||
2d924fd9 ILT |
3726 | // Force the alignment of the first TLS section to be the maximum |
3727 | // alignment of all TLS sections. | |
3728 | Output_section* first_tls = NULL; | |
3729 | uint64_t tls_align = 0; | |
3730 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
3731 | p != this->sections_elements_->end(); | |
3732 | ++p) | |
3733 | { | |
ca09d69a | 3734 | Output_section* os = (*p)->get_output_section(); |
2d924fd9 ILT |
3735 | if (os != NULL && (os->flags() & elfcpp::SHF_TLS) != 0) |
3736 | { | |
3737 | if (first_tls == NULL) | |
3738 | first_tls = os; | |
3739 | if (os->addralign() > tls_align) | |
3740 | tls_align = os->addralign(); | |
3741 | } | |
3742 | } | |
3743 | if (first_tls != NULL) | |
3744 | first_tls->set_addralign(tls_align); | |
3745 | ||
77e65537 | 3746 | // For a relocatable link, we implicitly set dot to zero. |
a445fddf | 3747 | uint64_t dot_value = 0; |
f6973bdc | 3748 | uint64_t dot_alignment = 0; |
fd247bfe | 3749 | uint64_t load_address = 0; |
3c12dcdb DK |
3750 | |
3751 | // Check to see if we want to use any of -Ttext, -Tdata and -Tbss options | |
3752 | // to set section addresses. If the script has any SEGMENT_START | |
3753 | // expression, we do not set the section addresses. | |
3754 | bool use_tsection_options = | |
3755 | (!this->saw_segment_start_expression_ | |
3756 | && (parameters->options().user_set_Ttext() | |
3757 | || parameters->options().user_set_Tdata() | |
3758 | || parameters->options().user_set_Tbss())); | |
3759 | ||
a445fddf ILT |
3760 | for (Sections_elements::iterator p = this->sections_elements_->begin(); |
3761 | p != this->sections_elements_->end(); | |
3762 | ++p) | |
3c12dcdb DK |
3763 | { |
3764 | Output_section* os = (*p)->get_output_section(); | |
3765 | ||
3766 | // Handle -Ttext, -Tdata and -Tbss options. We do this by looking for | |
3785f51a | 3767 | // the special sections by names and doing dot assignments. |
3c12dcdb DK |
3768 | if (use_tsection_options |
3769 | && os != NULL | |
3770 | && (os->flags() & elfcpp::SHF_ALLOC) != 0) | |
3771 | { | |
3772 | uint64_t new_dot_value = dot_value; | |
3773 | ||
3774 | if (parameters->options().user_set_Ttext() | |
3775 | && strcmp(os->name(), ".text") == 0) | |
3776 | new_dot_value = parameters->options().Ttext(); | |
3777 | else if (parameters->options().user_set_Tdata() | |
3778 | && strcmp(os->name(), ".data") == 0) | |
3779 | new_dot_value = parameters->options().Tdata(); | |
3780 | else if (parameters->options().user_set_Tbss() | |
3781 | && strcmp(os->name(), ".bss") == 0) | |
3782 | new_dot_value = parameters->options().Tbss(); | |
3783 | ||
3784 | // Update dot and load address if necessary. | |
3785 | if (new_dot_value < dot_value) | |
3786 | gold_error(_("dot may not move backward")); | |
3787 | else if (new_dot_value != dot_value) | |
3788 | { | |
3789 | dot_value = new_dot_value; | |
3790 | load_address = new_dot_value; | |
3791 | } | |
3792 | } | |
3793 | ||
f6973bdc ILT |
3794 | (*p)->set_section_addresses(symtab, layout, &dot_value, &dot_alignment, |
3795 | &load_address); | |
3785f51a | 3796 | } |
a445fddf | 3797 | |
1c4f3631 ILT |
3798 | if (this->phdrs_elements_ != NULL) |
3799 | { | |
3800 | for (Phdrs_elements::iterator p = this->phdrs_elements_->begin(); | |
3801 | p != this->phdrs_elements_->end(); | |
3802 | ++p) | |
3803 | (*p)->eval_load_address(symtab, layout); | |
3804 | } | |
3805 | ||
f6973bdc | 3806 | return this->create_segments(layout, dot_alignment); |
a445fddf ILT |
3807 | } |
3808 | ||
3809 | // Sort the sections in order to put them into segments. | |
3810 | ||
3811 | class Sort_output_sections | |
3812 | { | |
3813 | public: | |
eb373049 ILT |
3814 | Sort_output_sections(const Script_sections::Sections_elements* elements) |
3815 | : elements_(elements) | |
3816 | { } | |
3817 | ||
a445fddf ILT |
3818 | bool |
3819 | operator()(const Output_section* os1, const Output_section* os2) const; | |
eb373049 ILT |
3820 | |
3821 | private: | |
fd7a005d ILT |
3822 | int |
3823 | script_compare(const Output_section* os1, const Output_section* os2) const; | |
eb373049 ILT |
3824 | |
3825 | private: | |
3826 | const Script_sections::Sections_elements* elements_; | |
a445fddf ILT |
3827 | }; |
3828 | ||
3829 | bool | |
3830 | Sort_output_sections::operator()(const Output_section* os1, | |
3831 | const Output_section* os2) const | |
3832 | { | |
3833 | // Sort first by the load address. | |
3834 | uint64_t lma1 = (os1->has_load_address() | |
3835 | ? os1->load_address() | |
3836 | : os1->address()); | |
3837 | uint64_t lma2 = (os2->has_load_address() | |
3838 | ? os2->load_address() | |
3839 | : os2->address()); | |
3840 | if (lma1 != lma2) | |
3841 | return lma1 < lma2; | |
3842 | ||
3843 | // Then sort by the virtual address. | |
3844 | if (os1->address() != os2->address()) | |
3845 | return os1->address() < os2->address(); | |
3846 | ||
fd7a005d ILT |
3847 | // If the linker script says which of these sections is first, go |
3848 | // with what it says. | |
3849 | int i = this->script_compare(os1, os2); | |
3850 | if (i != 0) | |
3851 | return i < 0; | |
3852 | ||
0aa45fac CC |
3853 | // Sort PROGBITS before NOBITS. |
3854 | bool nobits1 = os1->type() == elfcpp::SHT_NOBITS; | |
3855 | bool nobits2 = os2->type() == elfcpp::SHT_NOBITS; | |
3856 | if (nobits1 != nobits2) | |
3857 | return nobits2; | |
3858 | ||
3859 | // Sort PROGBITS TLS sections to the end, NOBITS TLS sections to the | |
3860 | // beginning. | |
a445fddf ILT |
3861 | bool tls1 = (os1->flags() & elfcpp::SHF_TLS) != 0; |
3862 | bool tls2 = (os2->flags() & elfcpp::SHF_TLS) != 0; | |
3863 | if (tls1 != tls2) | |
0aa45fac | 3864 | return nobits1 ? tls1 : tls2; |
a445fddf | 3865 | |
1e5d2fb1 DK |
3866 | // Sort non-NOLOAD before NOLOAD. |
3867 | if (os1->is_noload() && !os2->is_noload()) | |
3868 | return true; | |
3869 | if (!os1->is_noload() && os2->is_noload()) | |
3870 | return true; | |
fd7a005d ILT |
3871 | |
3872 | // The sections seem practically identical. Sort by name to get a | |
3873 | // stable sort. | |
3874 | return os1->name() < os2->name(); | |
eb373049 ILT |
3875 | } |
3876 | ||
fd7a005d ILT |
3877 | // Return -1 if OS1 comes before OS2 in ELEMENTS_, 1 if comes after, 0 |
3878 | // if either OS1 or OS2 is not mentioned. This ensures that we keep | |
3879 | // empty sections in the order in which they appear in a linker | |
3880 | // script. | |
eb373049 | 3881 | |
fd7a005d ILT |
3882 | int |
3883 | Sort_output_sections::script_compare(const Output_section* os1, | |
3884 | const Output_section* os2) const | |
eb373049 ILT |
3885 | { |
3886 | if (this->elements_ == NULL) | |
fd7a005d | 3887 | return 0; |
eb373049 | 3888 | |
fd7a005d ILT |
3889 | bool found_os1 = false; |
3890 | bool found_os2 = false; | |
eb373049 ILT |
3891 | for (Script_sections::Sections_elements::const_iterator |
3892 | p = this->elements_->begin(); | |
3893 | p != this->elements_->end(); | |
3894 | ++p) | |
3895 | { | |
fd7a005d | 3896 | if (os2 == (*p)->get_output_section()) |
eb373049 | 3897 | { |
fd7a005d ILT |
3898 | if (found_os1) |
3899 | return -1; | |
3900 | found_os2 = true; | |
3901 | } | |
3902 | else if (os1 == (*p)->get_output_section()) | |
3903 | { | |
3904 | if (found_os2) | |
3905 | return 1; | |
3906 | found_os1 = true; | |
eb373049 ILT |
3907 | } |
3908 | } | |
3909 | ||
fd7a005d | 3910 | return 0; |
a445fddf ILT |
3911 | } |
3912 | ||
3913 | // Return whether OS is a BSS section. This is a SHT_NOBITS section. | |
3914 | // We treat a section with the SHF_TLS flag set as taking up space | |
3915 | // even if it is SHT_NOBITS (this is true of .tbss), as we allocate | |
3916 | // space for them in the file. | |
3917 | ||
3918 | bool | |
3919 | Script_sections::is_bss_section(const Output_section* os) | |
3920 | { | |
3921 | return (os->type() == elfcpp::SHT_NOBITS | |
3922 | && (os->flags() & elfcpp::SHF_TLS) == 0); | |
3923 | } | |
3924 | ||
1c4f3631 ILT |
3925 | // Return the size taken by the file header and the program headers. |
3926 | ||
3927 | size_t | |
3928 | Script_sections::total_header_size(Layout* layout) const | |
3929 | { | |
3930 | size_t segment_count = layout->segment_count(); | |
3931 | size_t file_header_size; | |
3932 | size_t segment_headers_size; | |
8851ecca | 3933 | if (parameters->target().get_size() == 32) |
1c4f3631 ILT |
3934 | { |
3935 | file_header_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
3936 | segment_headers_size = segment_count * elfcpp::Elf_sizes<32>::phdr_size; | |
3937 | } | |
8851ecca | 3938 | else if (parameters->target().get_size() == 64) |
1c4f3631 ILT |
3939 | { |
3940 | file_header_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
3941 | segment_headers_size = segment_count * elfcpp::Elf_sizes<64>::phdr_size; | |
3942 | } | |
3943 | else | |
3944 | gold_unreachable(); | |
3945 | ||
3946 | return file_header_size + segment_headers_size; | |
3947 | } | |
3948 | ||
9b547ce6 | 3949 | // Return the amount we have to subtract from the LMA to accommodate |
1c4f3631 ILT |
3950 | // headers of the given size. The complication is that the file |
3951 | // header have to be at the start of a page, as otherwise it will not | |
3952 | // be at the start of the file. | |
3953 | ||
3954 | uint64_t | |
3955 | Script_sections::header_size_adjustment(uint64_t lma, | |
3956 | size_t sizeof_headers) const | |
3957 | { | |
8851ecca | 3958 | const uint64_t abi_pagesize = parameters->target().abi_pagesize(); |
1c4f3631 ILT |
3959 | uint64_t hdr_lma = lma - sizeof_headers; |
3960 | hdr_lma &= ~(abi_pagesize - 1); | |
3961 | return lma - hdr_lma; | |
3962 | } | |
3963 | ||
a445fddf ILT |
3964 | // Create the PT_LOAD segments when using a SECTIONS clause. Returns |
3965 | // the segment which should hold the file header and segment headers, | |
3966 | // if any. | |
3967 | ||
3968 | Output_segment* | |
f6973bdc | 3969 | Script_sections::create_segments(Layout* layout, uint64_t dot_alignment) |
a445fddf ILT |
3970 | { |
3971 | gold_assert(this->saw_sections_clause_); | |
3972 | ||
8851ecca | 3973 | if (parameters->options().relocatable()) |
a445fddf ILT |
3974 | return NULL; |
3975 | ||
1c4f3631 | 3976 | if (this->saw_phdrs_clause()) |
f6973bdc | 3977 | return create_segments_from_phdrs_clause(layout, dot_alignment); |
1c4f3631 | 3978 | |
a445fddf ILT |
3979 | Layout::Section_list sections; |
3980 | layout->get_allocated_sections(§ions); | |
3981 | ||
3982 | // Sort the sections by address. | |
3785f51a | 3983 | std::stable_sort(sections.begin(), sections.end(), |
eb373049 | 3984 | Sort_output_sections(this->sections_elements_)); |
a445fddf ILT |
3985 | |
3986 | this->create_note_and_tls_segments(layout, §ions); | |
3987 | ||
3988 | // Walk through the sections adding them to PT_LOAD segments. | |
8851ecca | 3989 | const uint64_t abi_pagesize = parameters->target().abi_pagesize(); |
a445fddf ILT |
3990 | Output_segment* first_seg = NULL; |
3991 | Output_segment* current_seg = NULL; | |
3992 | bool is_current_seg_readonly = true; | |
a445fddf ILT |
3993 | uint64_t last_vma = 0; |
3994 | uint64_t last_lma = 0; | |
3995 | uint64_t last_size = 0; | |
d81222d3 | 3996 | bool in_bss = false; |
a445fddf ILT |
3997 | for (Layout::Section_list::iterator p = sections.begin(); |
3998 | p != sections.end(); | |
3999 | ++p) | |
4000 | { | |
4001 | const uint64_t vma = (*p)->address(); | |
4002 | const uint64_t lma = ((*p)->has_load_address() | |
4003 | ? (*p)->load_address() | |
4004 | : vma); | |
4005 | const uint64_t size = (*p)->current_data_size(); | |
4006 | ||
4007 | bool need_new_segment; | |
4008 | if (current_seg == NULL) | |
4009 | need_new_segment = true; | |
4010 | else if (lma - vma != last_lma - last_vma) | |
4011 | { | |
4012 | // This section has a different LMA relationship than the | |
4013 | // last one; we need a new segment. | |
4014 | need_new_segment = true; | |
4015 | } | |
4016 | else if (align_address(last_lma + last_size, abi_pagesize) | |
4017 | < align_address(lma, abi_pagesize)) | |
4018 | { | |
4019 | // Putting this section in the segment would require | |
4020 | // skipping a page. | |
4021 | need_new_segment = true; | |
4022 | } | |
d81222d3 | 4023 | else if (in_bss && !is_bss_section(*p)) |
a445fddf ILT |
4024 | { |
4025 | // A non-BSS section can not follow a BSS section in the | |
4026 | // same segment. | |
4027 | need_new_segment = true; | |
4028 | } | |
4029 | else if (is_current_seg_readonly | |
af6156ef ILT |
4030 | && ((*p)->flags() & elfcpp::SHF_WRITE) != 0 |
4031 | && !parameters->options().omagic()) | |
a445fddf ILT |
4032 | { |
4033 | // Don't put a writable section in the same segment as a | |
4034 | // non-writable section. | |
4035 | need_new_segment = true; | |
4036 | } | |
4037 | else | |
4038 | { | |
4039 | // Otherwise, reuse the existing segment. | |
4040 | need_new_segment = false; | |
4041 | } | |
4042 | ||
4043 | elfcpp::Elf_Word seg_flags = | |
4044 | Layout::section_flags_to_segment((*p)->flags()); | |
4045 | ||
4046 | if (need_new_segment) | |
4047 | { | |
4048 | current_seg = layout->make_output_segment(elfcpp::PT_LOAD, | |
4049 | seg_flags); | |
4050 | current_seg->set_addresses(vma, lma); | |
f6973bdc | 4051 | current_seg->set_minimum_p_align(dot_alignment); |
a445fddf ILT |
4052 | if (first_seg == NULL) |
4053 | first_seg = current_seg; | |
4054 | is_current_seg_readonly = true; | |
d81222d3 | 4055 | in_bss = false; |
a445fddf ILT |
4056 | } |
4057 | ||
22f0da72 | 4058 | current_seg->add_output_section_to_load(layout, *p, seg_flags); |
a445fddf ILT |
4059 | |
4060 | if (((*p)->flags() & elfcpp::SHF_WRITE) != 0) | |
4061 | is_current_seg_readonly = false; | |
4062 | ||
d81222d3 CC |
4063 | if (is_bss_section(*p) && size > 0) |
4064 | in_bss = true; | |
4065 | ||
a445fddf ILT |
4066 | last_vma = vma; |
4067 | last_lma = lma; | |
4068 | last_size = size; | |
4069 | } | |
4070 | ||
4071 | // An ELF program should work even if the program headers are not in | |
4072 | // a PT_LOAD segment. However, it appears that the Linux kernel | |
4073 | // does not set the AT_PHDR auxiliary entry in that case. It sets | |
4074 | // the load address to p_vaddr - p_offset of the first PT_LOAD | |
4075 | // segment. It then sets AT_PHDR to the load address plus the | |
4076 | // offset to the program headers, e_phoff in the file header. This | |
4077 | // fails when the program headers appear in the file before the | |
4078 | // first PT_LOAD segment. Therefore, we always create a PT_LOAD | |
4079 | // segment to hold the file header and the program headers. This is | |
4080 | // effectively what the GNU linker does, and it is slightly more | |
4081 | // efficient in any case. We try to use the first PT_LOAD segment | |
4082 | // if we can, otherwise we make a new one. | |
4083 | ||
919ed24c ILT |
4084 | if (first_seg == NULL) |
4085 | return NULL; | |
4086 | ||
3ee173de ILT |
4087 | // -n or -N mean that the program is not demand paged and there is |
4088 | // no need to put the program headers in a PT_LOAD segment. | |
4089 | if (parameters->options().nmagic() || parameters->options().omagic()) | |
4090 | return NULL; | |
4091 | ||
1c4f3631 | 4092 | size_t sizeof_headers = this->total_header_size(layout); |
3802b2dd | 4093 | |
919ed24c ILT |
4094 | uint64_t vma = first_seg->vaddr(); |
4095 | uint64_t lma = first_seg->paddr(); | |
4096 | ||
4097 | uint64_t subtract = this->header_size_adjustment(lma, sizeof_headers); | |
4098 | ||
e6188289 ILT |
4099 | if ((lma & (abi_pagesize - 1)) >= sizeof_headers) |
4100 | { | |
4101 | first_seg->set_addresses(vma - subtract, lma - subtract); | |
4102 | return first_seg; | |
4103 | } | |
4104 | ||
919ed24c ILT |
4105 | // If there is no room to squeeze in the headers, then punt. The |
4106 | // resulting executable probably won't run on GNU/Linux, but we | |
4107 | // trust that the user knows what they are doing. | |
4108 | if (lma < subtract || vma < subtract) | |
4109 | return NULL; | |
4110 | ||
ea5cae92 NC |
4111 | // If memory regions have been specified and the address range |
4112 | // we are about to use is not contained within any region then | |
4113 | // issue a warning message about the segment we are going to | |
4114 | // create. It will be outside of any region and so possibly | |
4115 | // using non-existent or protected memory. We test LMA rather | |
4116 | // than VMA since we assume that the headers will never be | |
4117 | // relocated. | |
4118 | if (this->memory_regions_ != NULL | |
4119 | && !this->block_in_region (NULL, layout, lma - subtract, subtract)) | |
4120 | gold_warning(_("creating a segment to contain the file and program" | |
4121 | " headers outside of any MEMORY region")); | |
4122 | ||
a445fddf ILT |
4123 | Output_segment* load_seg = layout->make_output_segment(elfcpp::PT_LOAD, |
4124 | elfcpp::PF_R); | |
919ed24c | 4125 | load_seg->set_addresses(vma - subtract, lma - subtract); |
a445fddf ILT |
4126 | |
4127 | return load_seg; | |
4128 | } | |
4129 | ||
4130 | // Create a PT_NOTE segment for each SHT_NOTE section and a PT_TLS | |
4131 | // segment if there are any SHT_TLS sections. | |
4132 | ||
4133 | void | |
4134 | Script_sections::create_note_and_tls_segments( | |
4135 | Layout* layout, | |
4136 | const Layout::Section_list* sections) | |
4137 | { | |
1c4f3631 ILT |
4138 | gold_assert(!this->saw_phdrs_clause()); |
4139 | ||
a445fddf ILT |
4140 | bool saw_tls = false; |
4141 | for (Layout::Section_list::const_iterator p = sections->begin(); | |
4142 | p != sections->end(); | |
4143 | ++p) | |
4144 | { | |
4145 | if ((*p)->type() == elfcpp::SHT_NOTE) | |
4146 | { | |
4147 | elfcpp::Elf_Word seg_flags = | |
4148 | Layout::section_flags_to_segment((*p)->flags()); | |
4149 | Output_segment* oseg = layout->make_output_segment(elfcpp::PT_NOTE, | |
4150 | seg_flags); | |
22f0da72 | 4151 | oseg->add_output_section_to_nonload(*p, seg_flags); |
a445fddf ILT |
4152 | |
4153 | // Incorporate any subsequent SHT_NOTE sections, in the | |
4154 | // hopes that the script is sensible. | |
4155 | Layout::Section_list::const_iterator pnext = p + 1; | |
4156 | while (pnext != sections->end() | |
4157 | && (*pnext)->type() == elfcpp::SHT_NOTE) | |
4158 | { | |
4159 | seg_flags = Layout::section_flags_to_segment((*pnext)->flags()); | |
22f0da72 | 4160 | oseg->add_output_section_to_nonload(*pnext, seg_flags); |
a445fddf ILT |
4161 | p = pnext; |
4162 | ++pnext; | |
4163 | } | |
4164 | } | |
4165 | ||
4166 | if (((*p)->flags() & elfcpp::SHF_TLS) != 0) | |
4167 | { | |
4168 | if (saw_tls) | |
4169 | gold_error(_("TLS sections are not adjacent")); | |
4170 | ||
4171 | elfcpp::Elf_Word seg_flags = | |
4172 | Layout::section_flags_to_segment((*p)->flags()); | |
4173 | Output_segment* oseg = layout->make_output_segment(elfcpp::PT_TLS, | |
4174 | seg_flags); | |
22f0da72 | 4175 | oseg->add_output_section_to_nonload(*p, seg_flags); |
a445fddf ILT |
4176 | |
4177 | Layout::Section_list::const_iterator pnext = p + 1; | |
4178 | while (pnext != sections->end() | |
4179 | && ((*pnext)->flags() & elfcpp::SHF_TLS) != 0) | |
4180 | { | |
4181 | seg_flags = Layout::section_flags_to_segment((*pnext)->flags()); | |
22f0da72 | 4182 | oseg->add_output_section_to_nonload(*pnext, seg_flags); |
a445fddf ILT |
4183 | p = pnext; |
4184 | ++pnext; | |
4185 | } | |
4186 | ||
4187 | saw_tls = true; | |
4188 | } | |
10b4f102 | 4189 | |
8086551f CC |
4190 | // If we see a section named .interp then put the .interp section |
4191 | // in a PT_INTERP segment. | |
e1f74f98 ILT |
4192 | // This is for GNU ld compatibility. |
4193 | if (strcmp((*p)->name(), ".interp") == 0) | |
10b4f102 ILT |
4194 | { |
4195 | elfcpp::Elf_Word seg_flags = | |
4196 | Layout::section_flags_to_segment((*p)->flags()); | |
4197 | Output_segment* oseg = layout->make_output_segment(elfcpp::PT_INTERP, | |
4198 | seg_flags); | |
4199 | oseg->add_output_section_to_nonload(*p, seg_flags); | |
4200 | } | |
a445fddf | 4201 | } |
8086551f CC |
4202 | |
4203 | this->segments_created_ = true; | |
a445fddf ILT |
4204 | } |
4205 | ||
1c4f3631 ILT |
4206 | // Add a program header. The PHDRS clause is syntactically distinct |
4207 | // from the SECTIONS clause, but we implement it with the SECTIONS | |
55458500 | 4208 | // support because PHDRS is useless if there is no SECTIONS clause. |
1c4f3631 ILT |
4209 | |
4210 | void | |
4211 | Script_sections::add_phdr(const char* name, size_t namelen, unsigned int type, | |
4212 | bool includes_filehdr, bool includes_phdrs, | |
4213 | bool is_flags_valid, unsigned int flags, | |
4214 | Expression* load_address) | |
4215 | { | |
4216 | if (this->phdrs_elements_ == NULL) | |
4217 | this->phdrs_elements_ = new Phdrs_elements(); | |
4218 | this->phdrs_elements_->push_back(new Phdrs_element(name, namelen, type, | |
4219 | includes_filehdr, | |
4220 | includes_phdrs, | |
4221 | is_flags_valid, flags, | |
4222 | load_address)); | |
4223 | } | |
4224 | ||
3802b2dd ILT |
4225 | // Return the number of segments we expect to create based on the |
4226 | // SECTIONS clause. This is used to implement SIZEOF_HEADERS. | |
4227 | ||
4228 | size_t | |
4229 | Script_sections::expected_segment_count(const Layout* layout) const | |
4230 | { | |
8086551f CC |
4231 | // If we've already created the segments, we won't be adding any more. |
4232 | if (this->segments_created_) | |
4233 | return 0; | |
4234 | ||
1c4f3631 ILT |
4235 | if (this->saw_phdrs_clause()) |
4236 | return this->phdrs_elements_->size(); | |
4237 | ||
3802b2dd ILT |
4238 | Layout::Section_list sections; |
4239 | layout->get_allocated_sections(§ions); | |
4240 | ||
4241 | // We assume that we will need two PT_LOAD segments. | |
4242 | size_t ret = 2; | |
4243 | ||
4244 | bool saw_note = false; | |
4245 | bool saw_tls = false; | |
8086551f | 4246 | bool saw_interp = false; |
3802b2dd ILT |
4247 | for (Layout::Section_list::const_iterator p = sections.begin(); |
4248 | p != sections.end(); | |
4249 | ++p) | |
4250 | { | |
4251 | if ((*p)->type() == elfcpp::SHT_NOTE) | |
4252 | { | |
4253 | // Assume that all note sections will fit into a single | |
4254 | // PT_NOTE segment. | |
4255 | if (!saw_note) | |
4256 | { | |
4257 | ++ret; | |
4258 | saw_note = true; | |
4259 | } | |
4260 | } | |
4261 | else if (((*p)->flags() & elfcpp::SHF_TLS) != 0) | |
4262 | { | |
4263 | // There can only be one PT_TLS segment. | |
4264 | if (!saw_tls) | |
4265 | { | |
4266 | ++ret; | |
4267 | saw_tls = true; | |
4268 | } | |
4269 | } | |
8086551f CC |
4270 | else if (strcmp((*p)->name(), ".interp") == 0) |
4271 | { | |
4272 | // There can only be one PT_INTERP segment. | |
4273 | if (!saw_interp) | |
4274 | { | |
4275 | ++ret; | |
4276 | saw_interp = true; | |
4277 | } | |
4278 | } | |
3802b2dd ILT |
4279 | } |
4280 | ||
4281 | return ret; | |
4282 | } | |
4283 | ||
1c4f3631 ILT |
4284 | // Create the segments from a PHDRS clause. Return the segment which |
4285 | // should hold the file header and program headers, if any. | |
4286 | ||
4287 | Output_segment* | |
f6973bdc ILT |
4288 | Script_sections::create_segments_from_phdrs_clause(Layout* layout, |
4289 | uint64_t dot_alignment) | |
1c4f3631 ILT |
4290 | { |
4291 | this->attach_sections_using_phdrs_clause(layout); | |
f6973bdc | 4292 | return this->set_phdrs_clause_addresses(layout, dot_alignment); |
1c4f3631 ILT |
4293 | } |
4294 | ||
4295 | // Create the segments from the PHDRS clause, and put the output | |
4296 | // sections in them. | |
4297 | ||
4298 | void | |
4299 | Script_sections::attach_sections_using_phdrs_clause(Layout* layout) | |
4300 | { | |
4301 | typedef std::map<std::string, Output_segment*> Name_to_segment; | |
4302 | Name_to_segment name_to_segment; | |
4303 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
4304 | p != this->phdrs_elements_->end(); | |
4305 | ++p) | |
4306 | name_to_segment[(*p)->name()] = (*p)->create_segment(layout); | |
8086551f | 4307 | this->segments_created_ = true; |
1c4f3631 ILT |
4308 | |
4309 | // Walk through the output sections and attach them to segments. | |
4310 | // Output sections in the script which do not list segments are | |
4311 | // attached to the same set of segments as the immediately preceding | |
4312 | // output section. | |
3785f51a | 4313 | |
1c4f3631 | 4314 | String_list* phdr_names = NULL; |
20e6d0d6 | 4315 | bool load_segments_only = false; |
1c4f3631 ILT |
4316 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); |
4317 | p != this->sections_elements_->end(); | |
4318 | ++p) | |
4319 | { | |
aecf301f | 4320 | bool is_orphan; |
20e6d0d6 | 4321 | String_list* old_phdr_names = phdr_names; |
aecf301f | 4322 | Output_section* os = (*p)->allocate_to_segment(&phdr_names, &is_orphan); |
1c4f3631 ILT |
4323 | if (os == NULL) |
4324 | continue; | |
4325 | ||
aecf301f ILT |
4326 | elfcpp::Elf_Word seg_flags = |
4327 | Layout::section_flags_to_segment(os->flags()); | |
4328 | ||
1c4f3631 ILT |
4329 | if (phdr_names == NULL) |
4330 | { | |
aecf301f ILT |
4331 | // Don't worry about empty orphan sections. |
4332 | if (is_orphan && os->current_data_size() > 0) | |
4333 | gold_error(_("allocated section %s not in any segment"), | |
4334 | os->name()); | |
4335 | ||
4336 | // To avoid later crashes drop this section into the first | |
4337 | // PT_LOAD segment. | |
4338 | for (Phdrs_elements::const_iterator ppe = | |
4339 | this->phdrs_elements_->begin(); | |
4340 | ppe != this->phdrs_elements_->end(); | |
4341 | ++ppe) | |
4342 | { | |
4343 | Output_segment* oseg = (*ppe)->segment(); | |
4344 | if (oseg->type() == elfcpp::PT_LOAD) | |
4345 | { | |
4346 | oseg->add_output_section_to_load(layout, os, seg_flags); | |
4347 | break; | |
4348 | } | |
4349 | } | |
4350 | ||
1c4f3631 ILT |
4351 | continue; |
4352 | } | |
4353 | ||
20e6d0d6 DK |
4354 | // We see a list of segments names. Disable PT_LOAD segment only |
4355 | // filtering. | |
4356 | if (old_phdr_names != phdr_names) | |
4357 | load_segments_only = false; | |
3785f51a | 4358 | |
2cefc357 ILT |
4359 | // If this is an orphan section--one that was not explicitly |
4360 | // mentioned in the linker script--then it should not inherit | |
4361 | // any segment type other than PT_LOAD. Otherwise, e.g., the | |
4362 | // PT_INTERP segment will pick up following orphan sections, | |
4363 | // which does not make sense. If this is not an orphan section, | |
4364 | // we trust the linker script. | |
aecf301f | 4365 | if (is_orphan) |
2cefc357 | 4366 | { |
20e6d0d6 DK |
4367 | // Enable PT_LOAD segments only filtering until we see another |
4368 | // list of segment names. | |
4369 | load_segments_only = true; | |
2cefc357 ILT |
4370 | } |
4371 | ||
1c4f3631 ILT |
4372 | bool in_load_segment = false; |
4373 | for (String_list::const_iterator q = phdr_names->begin(); | |
4374 | q != phdr_names->end(); | |
4375 | ++q) | |
4376 | { | |
4377 | Name_to_segment::const_iterator r = name_to_segment.find(*q); | |
4378 | if (r == name_to_segment.end()) | |
4379 | gold_error(_("no segment %s"), q->c_str()); | |
4380 | else | |
4381 | { | |
20e6d0d6 DK |
4382 | if (load_segments_only |
4383 | && r->second->type() != elfcpp::PT_LOAD) | |
4384 | continue; | |
4385 | ||
22f0da72 ILT |
4386 | if (r->second->type() != elfcpp::PT_LOAD) |
4387 | r->second->add_output_section_to_nonload(os, seg_flags); | |
4388 | else | |
1c4f3631 | 4389 | { |
22f0da72 | 4390 | r->second->add_output_section_to_load(layout, os, seg_flags); |
1c4f3631 ILT |
4391 | if (in_load_segment) |
4392 | gold_error(_("section in two PT_LOAD segments")); | |
4393 | in_load_segment = true; | |
4394 | } | |
4395 | } | |
4396 | } | |
4397 | ||
4398 | if (!in_load_segment) | |
4399 | gold_error(_("allocated section not in any PT_LOAD segment")); | |
4400 | } | |
4401 | } | |
4402 | ||
4403 | // Set the addresses for segments created from a PHDRS clause. Return | |
4404 | // the segment which should hold the file header and program headers, | |
4405 | // if any. | |
4406 | ||
4407 | Output_segment* | |
f6973bdc ILT |
4408 | Script_sections::set_phdrs_clause_addresses(Layout* layout, |
4409 | uint64_t dot_alignment) | |
1c4f3631 ILT |
4410 | { |
4411 | Output_segment* load_seg = NULL; | |
4412 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
4413 | p != this->phdrs_elements_->end(); | |
4414 | ++p) | |
4415 | { | |
4416 | // Note that we have to set the flags after adding the output | |
4417 | // sections to the segment, as adding an output segment can | |
4418 | // change the flags. | |
4419 | (*p)->set_flags_if_valid(); | |
4420 | ||
4421 | Output_segment* oseg = (*p)->segment(); | |
4422 | ||
4423 | if (oseg->type() != elfcpp::PT_LOAD) | |
4424 | { | |
4425 | // The addresses of non-PT_LOAD segments are set from the | |
4426 | // PT_LOAD segments. | |
4427 | if ((*p)->has_load_address()) | |
4428 | gold_error(_("may only specify load address for PT_LOAD segment")); | |
4429 | continue; | |
4430 | } | |
4431 | ||
f6973bdc ILT |
4432 | oseg->set_minimum_p_align(dot_alignment); |
4433 | ||
1c4f3631 ILT |
4434 | // The output sections should have addresses from the SECTIONS |
4435 | // clause. The addresses don't have to be in order, so find the | |
4436 | // one with the lowest load address. Use that to set the | |
4437 | // address of the segment. | |
4438 | ||
4439 | Output_section* osec = oseg->section_with_lowest_load_address(); | |
4440 | if (osec == NULL) | |
4441 | { | |
4442 | oseg->set_addresses(0, 0); | |
4443 | continue; | |
4444 | } | |
4445 | ||
4446 | uint64_t vma = osec->address(); | |
4447 | uint64_t lma = osec->has_load_address() ? osec->load_address() : vma; | |
4448 | ||
4449 | // Override the load address of the section with the load | |
4450 | // address specified for the segment. | |
4451 | if ((*p)->has_load_address()) | |
4452 | { | |
4453 | if (osec->has_load_address()) | |
4454 | gold_warning(_("PHDRS load address overrides " | |
4455 | "section %s load address"), | |
4456 | osec->name()); | |
4457 | ||
4458 | lma = (*p)->load_address(); | |
4459 | } | |
4460 | ||
4461 | bool headers = (*p)->includes_filehdr() && (*p)->includes_phdrs(); | |
4462 | if (!headers && ((*p)->includes_filehdr() || (*p)->includes_phdrs())) | |
4463 | { | |
4464 | // We could support this if we wanted to. | |
4465 | gold_error(_("using only one of FILEHDR and PHDRS is " | |
4466 | "not currently supported")); | |
4467 | } | |
4468 | if (headers) | |
4469 | { | |
4470 | size_t sizeof_headers = this->total_header_size(layout); | |
4471 | uint64_t subtract = this->header_size_adjustment(lma, | |
4472 | sizeof_headers); | |
4473 | if (lma >= subtract && vma >= subtract) | |
4474 | { | |
4475 | lma -= subtract; | |
4476 | vma -= subtract; | |
4477 | } | |
4478 | else | |
4479 | { | |
4480 | gold_error(_("sections loaded on first page without room " | |
4481 | "for file and program headers " | |
4482 | "are not supported")); | |
4483 | } | |
4484 | ||
4485 | if (load_seg != NULL) | |
4486 | gold_error(_("using FILEHDR and PHDRS on more than one " | |
4487 | "PT_LOAD segment is not currently supported")); | |
4488 | load_seg = oseg; | |
4489 | } | |
4490 | ||
4491 | oseg->set_addresses(vma, lma); | |
4492 | } | |
4493 | ||
4494 | return load_seg; | |
4495 | } | |
4496 | ||
4497 | // Add the file header and segment headers to non-load segments | |
4498 | // specified in the PHDRS clause. | |
4499 | ||
4500 | void | |
4501 | Script_sections::put_headers_in_phdrs(Output_data* file_header, | |
4502 | Output_data* segment_headers) | |
4503 | { | |
4504 | gold_assert(this->saw_phdrs_clause()); | |
4505 | for (Phdrs_elements::iterator p = this->phdrs_elements_->begin(); | |
4506 | p != this->phdrs_elements_->end(); | |
4507 | ++p) | |
4508 | { | |
4509 | if ((*p)->type() != elfcpp::PT_LOAD) | |
4510 | { | |
4511 | if ((*p)->includes_phdrs()) | |
4512 | (*p)->segment()->add_initial_output_data(segment_headers); | |
4513 | if ((*p)->includes_filehdr()) | |
4514 | (*p)->segment()->add_initial_output_data(file_header); | |
4515 | } | |
4516 | } | |
4517 | } | |
4518 | ||
8f2eb564 ILT |
4519 | // Look for an output section by name and return the address, the load |
4520 | // address, the alignment, and the size. This is used when an | |
4521 | // expression refers to an output section which was not actually | |
4522 | // created. This returns true if the section was found, false | |
4523 | // otherwise. | |
4524 | ||
4525 | bool | |
4526 | Script_sections::get_output_section_info(const char* name, uint64_t* address, | |
4527 | uint64_t* load_address, | |
2ea97941 | 4528 | uint64_t* addralign, |
8f2eb564 ILT |
4529 | uint64_t* size) const |
4530 | { | |
4531 | if (!this->saw_sections_clause_) | |
4532 | return false; | |
4533 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
4534 | p != this->sections_elements_->end(); | |
4535 | ++p) | |
2ea97941 | 4536 | if ((*p)->get_output_section_info(name, address, load_address, addralign, |
8f2eb564 ILT |
4537 | size)) |
4538 | return true; | |
4539 | return false; | |
4540 | } | |
4541 | ||
20e6d0d6 DK |
4542 | // Release all Output_segments. This remove all pointers to all |
4543 | // Output_segments. | |
4544 | ||
4545 | void | |
4546 | Script_sections::release_segments() | |
4547 | { | |
4548 | if (this->saw_phdrs_clause()) | |
4549 | { | |
4550 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
4551 | p != this->phdrs_elements_->end(); | |
4552 | ++p) | |
4553 | (*p)->release_segment(); | |
4554 | } | |
3785f51a | 4555 | this->segments_created_ = false; |
20e6d0d6 DK |
4556 | } |
4557 | ||
494e05f4 ILT |
4558 | // Print the SECTIONS clause to F for debugging. |
4559 | ||
4560 | void | |
4561 | Script_sections::print(FILE* f) const | |
4562 | { | |
7f8cd844 NC |
4563 | if (this->phdrs_elements_ != NULL) |
4564 | { | |
4565 | fprintf(f, "PHDRS {\n"); | |
4566 | for (Phdrs_elements::const_iterator p = this->phdrs_elements_->begin(); | |
4567 | p != this->phdrs_elements_->end(); | |
4568 | ++p) | |
4569 | (*p)->print(f); | |
4570 | fprintf(f, "}\n"); | |
4571 | } | |
4572 | ||
4573 | if (this->memory_regions_ != NULL) | |
4574 | { | |
4575 | fprintf(f, "MEMORY {\n"); | |
4576 | for (Memory_regions::const_iterator m = this->memory_regions_->begin(); | |
4577 | m != this->memory_regions_->end(); | |
4578 | ++m) | |
4579 | (*m)->print(f); | |
4580 | fprintf(f, "}\n"); | |
4581 | } | |
4582 | ||
494e05f4 ILT |
4583 | if (!this->saw_sections_clause_) |
4584 | return; | |
4585 | ||
4586 | fprintf(f, "SECTIONS {\n"); | |
4587 | ||
4588 | for (Sections_elements::const_iterator p = this->sections_elements_->begin(); | |
4589 | p != this->sections_elements_->end(); | |
4590 | ++p) | |
4591 | (*p)->print(f); | |
4592 | ||
4593 | fprintf(f, "}\n"); | |
4594 | } | |
4595 | ||
4596 | } // End namespace gold. |