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053a4d68 JY |
1 | // aarch64.cc -- aarch64 target support for gold. |
2 | ||
3 | // Copyright (C) 2014 Free Software Foundation, Inc. | |
9363c7c3 | 4 | // Written by Jing Yu <jingyu@google.com> and Han Shen <shenhan@google.com>. |
053a4d68 JY |
5 | |
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | #include "gold.h" | |
24 | ||
25 | #include <cstring> | |
26 | ||
27 | #include "elfcpp.h" | |
28 | #include "dwarf.h" | |
29 | #include "parameters.h" | |
30 | #include "reloc.h" | |
31 | #include "aarch64.h" | |
32 | #include "object.h" | |
33 | #include "symtab.h" | |
34 | #include "layout.h" | |
35 | #include "output.h" | |
36 | #include "copy-relocs.h" | |
37 | #include "target.h" | |
38 | #include "target-reloc.h" | |
39 | #include "target-select.h" | |
40 | #include "tls.h" | |
41 | #include "freebsd.h" | |
42 | #include "nacl.h" | |
43 | #include "gc.h" | |
44 | #include "icf.h" | |
9363c7c3 | 45 | #include "aarch64-reloc-property.h" |
053a4d68 JY |
46 | |
47 | // The first three .got.plt entries are reserved. | |
48 | const int32_t AARCH64_GOTPLT_RESERVE_COUNT = 3; | |
49 | ||
83a01957 | 50 | |
053a4d68 JY |
51 | namespace |
52 | { | |
53 | ||
54 | using namespace gold; | |
55 | ||
56 | template<int size, bool big_endian> | |
57 | class Output_data_plt_aarch64; | |
58 | ||
59 | template<int size, bool big_endian> | |
60 | class Output_data_plt_aarch64_standard; | |
61 | ||
62 | template<int size, bool big_endian> | |
63 | class Target_aarch64; | |
64 | ||
9363c7c3 JY |
65 | template<int size, bool big_endian> |
66 | class AArch64_relocate_functions; | |
67 | ||
053a4d68 JY |
68 | // Output_data_got_aarch64 class. |
69 | ||
70 | template<int size, bool big_endian> | |
71 | class Output_data_got_aarch64 : public Output_data_got<size, big_endian> | |
72 | { | |
73 | public: | |
74 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
75 | Output_data_got_aarch64(Symbol_table* symtab, Layout* layout) | |
9363c7c3 JY |
76 | : Output_data_got<size, big_endian>(), |
77 | symbol_table_(symtab), layout_(layout) | |
053a4d68 JY |
78 | { } |
79 | ||
8e33481e HS |
80 | // Add a static entry for the GOT entry at OFFSET. GSYM is a global |
81 | // symbol and R_TYPE is the code of a dynamic relocation that needs to be | |
82 | // applied in a static link. | |
83 | void | |
84 | add_static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
85 | { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } | |
86 | ||
87 | ||
88 | // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object | |
89 | // defining a local symbol with INDEX. R_TYPE is the code of a dynamic | |
90 | // relocation that needs to be applied in a static link. | |
91 | void | |
92 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
93 | Sized_relobj_file<size, big_endian>* relobj, | |
94 | unsigned int index) | |
95 | { | |
96 | this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, | |
97 | index)); | |
98 | } | |
99 | ||
100 | ||
053a4d68 JY |
101 | protected: |
102 | // Write out the GOT table. | |
103 | void | |
104 | do_write(Output_file* of) { | |
105 | // The first entry in the GOT is the address of the .dynamic section. | |
106 | gold_assert(this->data_size() >= size / 8); | |
107 | Output_section* dynamic = this->layout_->dynamic_section(); | |
108 | Valtype dynamic_addr = dynamic == NULL ? 0 : dynamic->address(); | |
109 | this->replace_constant(0, dynamic_addr); | |
110 | Output_data_got<size, big_endian>::do_write(of); | |
8e33481e HS |
111 | |
112 | // Handling static relocs | |
113 | if (this->static_relocs_.empty()) | |
114 | return; | |
115 | ||
116 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
117 | ||
118 | gold_assert(parameters->doing_static_link()); | |
119 | const off_t offset = this->offset(); | |
120 | const section_size_type oview_size = | |
121 | convert_to_section_size_type(this->data_size()); | |
122 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
123 | ||
124 | Output_segment* tls_segment = this->layout_->tls_segment(); | |
125 | gold_assert(tls_segment != NULL); | |
126 | ||
127 | AArch64_address aligned_tcb_address = | |
83a01957 | 128 | align_address(Target_aarch64<size, big_endian>::TCB_SIZE, |
8e33481e HS |
129 | tls_segment->maximum_alignment()); |
130 | ||
131 | for (size_t i = 0; i < this->static_relocs_.size(); ++i) | |
132 | { | |
133 | Static_reloc& reloc(this->static_relocs_[i]); | |
134 | AArch64_address value; | |
135 | ||
136 | if (!reloc.symbol_is_global()) | |
137 | { | |
138 | Sized_relobj_file<size, big_endian>* object = reloc.relobj(); | |
139 | const Symbol_value<size>* psymval = | |
140 | reloc.relobj()->local_symbol(reloc.index()); | |
141 | ||
142 | // We are doing static linking. Issue an error and skip this | |
143 | // relocation if the symbol is undefined or in a discarded_section. | |
144 | bool is_ordinary; | |
145 | unsigned int shndx = psymval->input_shndx(&is_ordinary); | |
146 | if ((shndx == elfcpp::SHN_UNDEF) | |
147 | || (is_ordinary | |
148 | && shndx != elfcpp::SHN_UNDEF | |
149 | && !object->is_section_included(shndx) | |
150 | && !this->symbol_table_->is_section_folded(object, shndx))) | |
151 | { | |
152 | gold_error(_("undefined or discarded local symbol %u from " | |
153 | " object %s in GOT"), | |
154 | reloc.index(), reloc.relobj()->name().c_str()); | |
155 | continue; | |
156 | } | |
157 | value = psymval->value(object, 0); | |
158 | } | |
159 | else | |
160 | { | |
161 | const Symbol* gsym = reloc.symbol(); | |
162 | gold_assert(gsym != NULL); | |
163 | if (gsym->is_forwarder()) | |
164 | gsym = this->symbol_table_->resolve_forwards(gsym); | |
165 | ||
166 | // We are doing static linking. Issue an error and skip this | |
167 | // relocation if the symbol is undefined or in a discarded_section | |
168 | // unless it is a weakly_undefined symbol. | |
169 | if ((gsym->is_defined_in_discarded_section() | |
170 | || gsym->is_undefined()) | |
171 | && !gsym->is_weak_undefined()) | |
172 | { | |
173 | gold_error(_("undefined or discarded symbol %s in GOT"), | |
174 | gsym->name()); | |
175 | continue; | |
176 | } | |
177 | ||
178 | if (!gsym->is_weak_undefined()) | |
179 | { | |
180 | const Sized_symbol<size>* sym = | |
181 | static_cast<const Sized_symbol<size>*>(gsym); | |
182 | value = sym->value(); | |
183 | } | |
184 | else | |
185 | value = 0; | |
186 | } | |
187 | ||
188 | unsigned got_offset = reloc.got_offset(); | |
189 | gold_assert(got_offset < oview_size); | |
190 | ||
191 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
192 | Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); | |
193 | Valtype x; | |
194 | switch (reloc.r_type()) | |
195 | { | |
196 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
197 | x = value; | |
198 | break; | |
199 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
200 | x = value + aligned_tcb_address; | |
201 | break; | |
202 | default: | |
203 | gold_unreachable(); | |
204 | } | |
205 | elfcpp::Swap<size, big_endian>::writeval(wv, x); | |
206 | } | |
207 | ||
208 | of->write_output_view(offset, oview_size, oview); | |
053a4d68 JY |
209 | } |
210 | ||
211 | private: | |
9363c7c3 JY |
212 | // Symbol table of the output object. |
213 | Symbol_table* symbol_table_; | |
053a4d68 JY |
214 | // A pointer to the Layout class, so that we can find the .dynamic |
215 | // section when we write out the GOT section. | |
216 | Layout* layout_; | |
8e33481e | 217 | |
8e33481e HS |
218 | // This class represent dynamic relocations that need to be applied by |
219 | // gold because we are using TLS relocations in a static link. | |
220 | class Static_reloc | |
221 | { | |
222 | public: | |
223 | Static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
224 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) | |
225 | { this->u_.global.symbol = gsym; } | |
226 | ||
227 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
228 | Sized_relobj_file<size, big_endian>* relobj, unsigned int index) | |
229 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) | |
230 | { | |
231 | this->u_.local.relobj = relobj; | |
232 | this->u_.local.index = index; | |
233 | } | |
234 | ||
235 | // Return the GOT offset. | |
236 | unsigned int | |
237 | got_offset() const | |
238 | { return this->got_offset_; } | |
239 | ||
240 | // Relocation type. | |
241 | unsigned int | |
242 | r_type() const | |
243 | { return this->r_type_; } | |
244 | ||
245 | // Whether the symbol is global or not. | |
246 | bool | |
247 | symbol_is_global() const | |
248 | { return this->symbol_is_global_; } | |
249 | ||
250 | // For a relocation against a global symbol, the global symbol. | |
251 | Symbol* | |
252 | symbol() const | |
253 | { | |
254 | gold_assert(this->symbol_is_global_); | |
255 | return this->u_.global.symbol; | |
256 | } | |
257 | ||
258 | // For a relocation against a local symbol, the defining object. | |
259 | Sized_relobj_file<size, big_endian>* | |
260 | relobj() const | |
261 | { | |
262 | gold_assert(!this->symbol_is_global_); | |
263 | return this->u_.local.relobj; | |
264 | } | |
265 | ||
266 | // For a relocation against a local symbol, the local symbol index. | |
267 | unsigned int | |
268 | index() const | |
269 | { | |
270 | gold_assert(!this->symbol_is_global_); | |
271 | return this->u_.local.index; | |
272 | } | |
273 | ||
274 | private: | |
275 | // GOT offset of the entry to which this relocation is applied. | |
276 | unsigned int got_offset_; | |
277 | // Type of relocation. | |
278 | unsigned int r_type_; | |
279 | // Whether this relocation is against a global symbol. | |
280 | bool symbol_is_global_; | |
281 | // A global or local symbol. | |
282 | union | |
283 | { | |
83a01957 HS |
284 | struct |
285 | { | |
286 | // For a global symbol, the symbol itself. | |
287 | Symbol* symbol; | |
288 | } global; | |
289 | struct | |
290 | { | |
291 | // For a local symbol, the object defining the symbol. | |
292 | Sized_relobj_file<size, big_endian>* relobj; | |
293 | // For a local symbol, the symbol index. | |
294 | unsigned int index; | |
295 | } local; | |
296 | } u_; | |
297 | }; // End of inner class Static_reloc | |
298 | ||
299 | std::vector<Static_reloc> static_relocs_; | |
300 | }; // End of Output_data_got_aarch64 | |
301 | ||
302 | ||
303 | template<int size, bool big_endian> | |
304 | class AArch64_input_section; | |
305 | ||
306 | ||
307 | template<int size, bool big_endian> | |
308 | class AArch64_output_section; | |
309 | ||
310 | ||
311 | // Reloc stub class. | |
312 | ||
313 | template<int size, bool big_endian> | |
314 | class Reloc_stub | |
315 | { | |
316 | public: | |
317 | typedef Reloc_stub<size, big_endian> This; | |
318 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
319 | ||
320 | // Do not change the value of the enums, they are used to index into | |
321 | // stub_insns array. | |
322 | typedef enum | |
323 | { | |
324 | ST_NONE = 0, | |
325 | ||
326 | // Using adrp/add pair, 4 insns (including alignment) without mem access, | |
327 | // the fastest stub. This has a limited jump distance, which is tested by | |
328 | // aarch64_valid_for_adrp_p. | |
329 | ST_ADRP_BRANCH = 1, | |
330 | ||
331 | // Using ldr-absolute-address/br-register, 4 insns with 1 mem access, | |
332 | // unlimited in jump distance. | |
333 | ST_LONG_BRANCH_ABS = 2, | |
334 | ||
335 | // Using ldr/calculate-pcrel/jump, 8 insns (including alignment) with 1 mem | |
336 | // access, slowest one. Only used in position independent executables. | |
337 | ST_LONG_BRANCH_PCREL = 3, | |
338 | ||
339 | } Stub_type; | |
340 | ||
341 | // Branch range. This is used to calculate the section group size, as well as | |
342 | // determine whether a stub is needed. | |
343 | static const int MAX_BRANCH_OFFSET = ((1 << 25) - 1) << 2; | |
344 | static const int MIN_BRANCH_OFFSET = -((1 << 25) << 2); | |
345 | ||
346 | // Constant used to determine if an offset fits in the adrp instruction | |
347 | // encoding. | |
348 | static const int MAX_ADRP_IMM = (1 << 20) - 1; | |
349 | static const int MIN_ADRP_IMM = -(1 << 20); | |
350 | ||
351 | static const int BYTES_PER_INSN = 4; | |
352 | static const int STUB_ADDR_ALIGN = 4; | |
353 | ||
354 | // Determine whether the offset fits in the jump/branch instruction. | |
355 | static bool | |
356 | aarch64_valid_branch_offset_p(int64_t offset) | |
357 | { return offset >= MIN_BRANCH_OFFSET && offset <= MAX_BRANCH_OFFSET; } | |
358 | ||
359 | // Determine whether the offset fits in the adrp immediate field. | |
360 | static bool | |
361 | aarch64_valid_for_adrp_p(AArch64_address location, AArch64_address dest) | |
362 | { | |
363 | typedef AArch64_relocate_functions<size, big_endian> Reloc; | |
364 | int64_t adrp_imm = (Reloc::Page(dest) - Reloc::Page(location)) >> 12; | |
365 | return adrp_imm >= MIN_ADRP_IMM && adrp_imm <= MAX_ADRP_IMM; | |
366 | } | |
367 | ||
368 | // Determine the stub type for a certain relocation or ST_NONE, if no stub is | |
369 | // needed. | |
370 | static Stub_type | |
371 | stub_type_for_reloc(unsigned int r_type, AArch64_address address, | |
372 | AArch64_address target); | |
373 | ||
374 | Reloc_stub(Stub_type stub_type) | |
375 | : stub_type_(stub_type), offset_(invalid_offset), | |
376 | destination_address_(invalid_address) | |
377 | { } | |
378 | ||
379 | ~Reloc_stub() | |
380 | { } | |
381 | ||
382 | // Return offset of code stub from beginning of its containing stub table. | |
383 | section_offset_type | |
384 | offset() const | |
385 | { | |
386 | gold_assert(this->offset_ != invalid_offset); | |
387 | return this->offset_; | |
388 | } | |
389 | ||
390 | // Set offset of code stub from beginning of its containing stub table. | |
391 | void | |
392 | set_offset(section_offset_type offset) | |
393 | { this->offset_ = offset; } | |
394 | ||
395 | // Return destination address. | |
396 | AArch64_address | |
397 | destination_address() const | |
398 | { | |
399 | gold_assert(this->destination_address_ != this->invalid_address); | |
400 | return this->destination_address_; | |
401 | } | |
402 | ||
403 | // Set destination address. | |
404 | void | |
405 | set_destination_address(AArch64_address address) | |
406 | { | |
407 | gold_assert(address != this->invalid_address); | |
408 | this->destination_address_ = address; | |
409 | } | |
410 | ||
411 | // Reset the destination address. | |
412 | void | |
413 | reset_destination_address() | |
414 | { this->destination_address_ = this->invalid_address; } | |
415 | ||
416 | // Return the stub type. | |
417 | Stub_type | |
418 | stub_type() const | |
419 | { return stub_type_; } | |
420 | ||
421 | // Return the stub size. | |
422 | uint32_t | |
423 | stub_size() const | |
424 | { return this->stub_insn_number() * BYTES_PER_INSN; } | |
425 | ||
426 | // Return the instruction number of this stub instance. | |
427 | int | |
428 | stub_insn_number() const | |
429 | { return stub_insns_[this->stub_type_][0]; } | |
430 | ||
431 | // Note the first "insn" is the number of total insns in this array. | |
432 | const uint32_t* | |
433 | stub_insns() const | |
434 | { return stub_insns_[this->stub_type_]; } | |
435 | ||
436 | // Write stub to output file. | |
437 | void | |
438 | write(unsigned char* view, section_size_type view_size) | |
439 | { this->do_write(view, view_size); } | |
440 | ||
441 | // The key class used to index the stub instance in the stub table's stub map. | |
442 | class Key | |
443 | { | |
444 | public: | |
445 | Key(Stub_type stub_type, const Symbol* symbol, const Relobj* relobj, | |
446 | unsigned int r_sym, int32_t addend) | |
447 | : stub_type_(stub_type), addend_(addend) | |
448 | { | |
449 | if (symbol != NULL) | |
450 | { | |
451 | this->r_sym_ = Reloc_stub::invalid_index; | |
452 | this->u_.symbol = symbol; | |
453 | } | |
454 | else | |
455 | { | |
456 | gold_assert(relobj != NULL && r_sym != invalid_index); | |
457 | this->r_sym_ = r_sym; | |
458 | this->u_.relobj = relobj; | |
459 | } | |
460 | } | |
461 | ||
462 | ~Key() | |
463 | { } | |
464 | ||
465 | // Return stub type. | |
466 | Stub_type | |
467 | stub_type() const | |
468 | { return this->stub_type_; } | |
469 | ||
470 | // Return the local symbol index or invalid_index. | |
471 | unsigned int | |
472 | r_sym() const | |
473 | { return this->r_sym_; } | |
474 | ||
475 | // Return the symbol if there is one. | |
476 | const Symbol* | |
477 | symbol() const | |
478 | { return this->r_sym_ == invalid_index ? this->u_.symbol : NULL; } | |
479 | ||
480 | // Return the relobj if there is one. | |
481 | const Relobj* | |
482 | relobj() const | |
483 | { return this->r_sym_ != invalid_index ? this->u_.relobj : NULL; } | |
484 | ||
485 | // Whether this equals to another key k. | |
486 | bool | |
487 | eq(const Key& k) const | |
488 | { | |
489 | return ((this->stub_type_ == k.stub_type_) | |
490 | && (this->r_sym_ == k.r_sym_) | |
491 | && ((this->r_sym_ != Reloc_stub::invalid_index) | |
492 | ? (this->u_.relobj == k.u_.relobj) | |
493 | : (this->u_.symbol == k.u_.symbol)) | |
494 | && (this->addend_ == k.addend_)); | |
495 | } | |
496 | ||
497 | // Return a hash value. | |
498 | size_t | |
499 | hash_value() const | |
500 | { | |
501 | size_t name_hash_value = gold::string_hash<char>( | |
502 | (this->r_sym_ != Reloc_stub::invalid_index) | |
503 | ? this->u_.relobj->name().c_str() | |
504 | : this->u_.symbol->name()); | |
505 | // We only have 4 stub types. | |
506 | size_t stub_type_hash_value = 0x03 & this->stub_type_; | |
507 | return (name_hash_value | |
508 | ^ stub_type_hash_value | |
509 | ^ ((this->r_sym_ & 0x3fff) << 2) | |
510 | ^ ((this->addend_ & 0xffff) << 16)); | |
511 | } | |
512 | ||
513 | // Functors for STL associative containers. | |
514 | struct hash | |
515 | { | |
516 | size_t | |
517 | operator()(const Key& k) const | |
518 | { return k.hash_value(); } | |
519 | }; | |
520 | ||
521 | struct equal_to | |
522 | { | |
523 | bool | |
524 | operator()(const Key& k1, const Key& k2) const | |
525 | { return k1.eq(k2); } | |
526 | }; | |
527 | ||
528 | private: | |
529 | // Stub type. | |
530 | const Stub_type stub_type_; | |
531 | // If this is a local symbol, this is the index in the defining object. | |
532 | // Otherwise, it is invalid_index for a global symbol. | |
533 | unsigned int r_sym_; | |
534 | // If r_sym_ is an invalid index, this points to a global symbol. | |
535 | // Otherwise, it points to a relobj. We used the unsized and target | |
536 | // independent Symbol and Relobj classes instead of Sized_symbol<32> and | |
537 | // Arm_relobj, in order to avoid making the stub class a template | |
538 | // as most of the stub machinery is endianness-neutral. However, it | |
539 | // may require a bit of casting done by users of this class. | |
540 | union | |
541 | { | |
542 | const Symbol* symbol; | |
543 | const Relobj* relobj; | |
544 | } u_; | |
545 | // Addend associated with a reloc. | |
546 | int32_t addend_; | |
547 | }; // End of inner class Reloc_stub::Key | |
548 | ||
549 | protected: | |
550 | // This may be overridden in the child class. | |
551 | virtual void | |
552 | do_write(unsigned char*, section_size_type); | |
553 | ||
554 | private: | |
555 | static const section_offset_type invalid_offset = | |
556 | static_cast<section_offset_type>(-1); | |
557 | static const unsigned int invalid_index = static_cast<unsigned int>(-1); | |
558 | static const AArch64_address invalid_address = | |
559 | static_cast<AArch64_address>(-1); | |
560 | ||
561 | static const uint32_t stub_insns_[][10]; | |
562 | ||
563 | const Stub_type stub_type_; | |
564 | section_offset_type offset_; | |
565 | AArch64_address destination_address_; | |
566 | }; // End of Reloc_stub | |
567 | ||
568 | ||
569 | // Write data to output file. | |
570 | ||
571 | template<int size, bool big_endian> | |
572 | void | |
573 | Reloc_stub<size, big_endian>:: | |
574 | do_write(unsigned char* view, section_size_type) | |
575 | { | |
576 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
577 | const uint32_t* insns = this->stub_insns(); | |
578 | uint32_t num_insns = this->stub_insn_number(); | |
579 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
580 | for (uint32_t i = 1; i <= num_insns; ++i) | |
581 | elfcpp::Swap<32, big_endian>::writeval(ip + i - 1, insns[i]); | |
582 | } | |
583 | ||
584 | ||
585 | // Stubs instructions definition. | |
586 | ||
587 | template<int size, bool big_endian> | |
588 | const uint32_t | |
589 | Reloc_stub<size, big_endian>::stub_insns_[][10] = | |
590 | { | |
591 | // The first element of each group is the num of the insns. | |
592 | ||
593 | // ST_NONE | |
594 | {0, 0}, | |
595 | ||
596 | // ST_ADRP_BRANCH | |
597 | { | |
598 | 4, | |
599 | 0x90000010, /* adrp ip0, X */ | |
600 | /* ADR_PREL_PG_HI21(X) */ | |
601 | 0x91000210, /* add ip0, ip0, :lo12:X */ | |
602 | /* ADD_ABS_LO12_NC(X) */ | |
603 | 0xd61f0200, /* br ip0 */ | |
604 | 0x00000000, /* alignment padding */ | |
605 | }, | |
606 | ||
607 | // ST_LONG_BRANCH_ABS | |
608 | { | |
609 | 4, | |
610 | 0x58000050, /* ldr ip0, 0x8 */ | |
611 | 0xd61f0200, /* br ip0 */ | |
612 | 0x00000000, /* address field */ | |
613 | 0x00000000, /* address fields */ | |
614 | }, | |
615 | ||
616 | // ST_LONG_BRANCH_PCREL | |
617 | { | |
618 | 8, | |
619 | 0x58000090, /* ldr ip0, 0x10 */ | |
620 | 0x10000011, /* adr ip1, #0 */ | |
621 | 0x8b110210, /* add ip0, ip0, ip1 */ | |
622 | 0xd61f0200, /* br ip0 */ | |
623 | 0x00000000, /* address field */ | |
624 | 0x00000000, /* address field */ | |
625 | 0x00000000, /* alignment padding */ | |
626 | 0x00000000, /* alignment padding */ | |
627 | } | |
628 | }; | |
629 | ||
630 | ||
631 | // Determine the stub type for a certain relocation or ST_NONE, if no stub is | |
632 | // needed. | |
633 | ||
634 | template<int size, bool big_endian> | |
635 | inline | |
636 | typename Reloc_stub<size, big_endian>::Stub_type | |
637 | Reloc_stub<size, big_endian>::stub_type_for_reloc( | |
638 | unsigned int r_type, AArch64_address location, AArch64_address dest) | |
639 | { | |
640 | int64_t branch_offset = 0; | |
641 | switch(r_type) | |
642 | { | |
643 | case elfcpp::R_AARCH64_CALL26: | |
644 | case elfcpp::R_AARCH64_JUMP26: | |
645 | branch_offset = dest - location; | |
646 | break; | |
647 | default: | |
648 | gold_assert(false); | |
649 | } | |
650 | ||
651 | if (aarch64_valid_branch_offset_p(branch_offset)) | |
652 | return ST_NONE; | |
653 | ||
654 | if (aarch64_valid_for_adrp_p(location, dest)) | |
655 | return ST_ADRP_BRANCH; | |
656 | ||
657 | if (parameters->options().output_is_position_independent() | |
658 | && parameters->options().output_is_executable()) | |
659 | return ST_LONG_BRANCH_PCREL; | |
660 | ||
661 | return ST_LONG_BRANCH_ABS; | |
662 | } | |
663 | ||
664 | // A class to hold stubs for the ARM target. | |
665 | ||
666 | template<int size, bool big_endian> | |
667 | class Stub_table : public Output_data | |
668 | { | |
669 | public: | |
670 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
671 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
672 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
673 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
674 | typedef typename The_reloc_stub::Key The_reloc_stub_key; | |
675 | typedef typename The_reloc_stub_key::hash The_reloc_stub_key_hash; | |
676 | typedef typename The_reloc_stub_key::equal_to The_reloc_stub_key_equal_to; | |
677 | typedef Stub_table<size, big_endian> The_stub_table; | |
678 | typedef Unordered_map<The_reloc_stub_key, The_reloc_stub*, | |
679 | The_reloc_stub_key_hash, The_reloc_stub_key_equal_to> | |
680 | Reloc_stub_map; | |
681 | typedef typename Reloc_stub_map::const_iterator Reloc_stub_map_const_iter; | |
682 | typedef Relocate_info<size, big_endian> The_relocate_info; | |
683 | ||
684 | Stub_table(The_aarch64_input_section* owner) | |
685 | : Output_data(), owner_(owner), reloc_stubs_size_(0), prev_data_size_(0) | |
686 | { } | |
687 | ||
688 | ~Stub_table() | |
689 | { } | |
690 | ||
691 | The_aarch64_input_section* | |
692 | owner() const | |
693 | { return owner_; } | |
694 | ||
695 | // Whether this stub table is empty. | |
696 | bool | |
697 | empty() const | |
698 | { return reloc_stubs_.empty(); } | |
699 | ||
700 | // Return the current data size. | |
701 | off_t | |
702 | current_data_size() const | |
703 | { return this->current_data_size_for_child(); } | |
704 | ||
705 | // Add a STUB using KEY. The caller is responsible for avoiding addition | |
706 | // if a STUB with the same key has already been added. | |
707 | void | |
708 | add_reloc_stub(The_reloc_stub* stub, const The_reloc_stub_key& key); | |
709 | ||
710 | // Finalize stubs. No-op here, just for completeness. | |
711 | void | |
712 | finalize_stubs() | |
713 | { } | |
714 | ||
715 | // Look up a relocation stub using KEY. Return NULL if there is none. | |
716 | The_reloc_stub* | |
717 | find_reloc_stub(The_reloc_stub_key& key) | |
718 | { | |
719 | Reloc_stub_map_const_iter p = this->reloc_stubs_.find(key); | |
720 | return (p != this->reloc_stubs_.end()) ? p->second : NULL; | |
721 | } | |
722 | ||
723 | // Relocate stubs in this stub table. | |
724 | void | |
725 | relocate_stubs(const The_relocate_info*, | |
726 | The_target_aarch64*, | |
727 | Output_section*, | |
728 | unsigned char*, | |
729 | AArch64_address, | |
730 | section_size_type); | |
731 | ||
732 | // Update data size at the end of a relaxation pass. Return true if data size | |
733 | // is different from that of the previous relaxation pass. | |
734 | bool | |
735 | update_data_size_changed_p() | |
736 | { | |
737 | // No addralign changed here. | |
738 | off_t s = this->reloc_stubs_size_; | |
739 | bool changed = (s != this->prev_data_size_); | |
740 | this->prev_data_size_ = s; | |
741 | return changed; | |
742 | } | |
743 | ||
744 | protected: | |
745 | // Write out section contents. | |
746 | void | |
747 | do_write(Output_file*); | |
748 | ||
749 | // Return the required alignment. | |
750 | uint64_t | |
751 | do_addralign() const | |
752 | { return The_reloc_stub::STUB_ADDR_ALIGN; } | |
753 | ||
754 | // Reset address and file offset. | |
755 | void | |
756 | do_reset_address_and_file_offset() | |
757 | { this->set_current_data_size_for_child(this->prev_data_size_); } | |
758 | ||
759 | // Set final data size. | |
760 | void | |
761 | set_final_data_size() | |
762 | { this->set_data_size(this->current_data_size()); } | |
763 | ||
764 | private: | |
765 | // Relocate one stub. | |
766 | void | |
767 | relocate_stub(The_reloc_stub*, | |
768 | const The_relocate_info*, | |
769 | The_target_aarch64*, | |
770 | Output_section*, | |
771 | unsigned char*, | |
772 | AArch64_address, | |
773 | section_size_type); | |
774 | ||
775 | private: | |
776 | // Owner of this stub table. | |
777 | The_aarch64_input_section* owner_; | |
778 | // The relocation stubs. | |
779 | Reloc_stub_map reloc_stubs_; | |
780 | // Size of reloc stubs. | |
781 | off_t reloc_stubs_size_; | |
782 | // data size of this in the previous pass. | |
783 | off_t prev_data_size_; | |
784 | }; // End of Stub_table | |
785 | ||
786 | ||
787 | // Add a STUB using KEY. The caller is responsible for avoiding addition | |
788 | // if a STUB with the same key has already been added. | |
789 | ||
790 | template<int size, bool big_endian> | |
791 | void | |
792 | Stub_table<size, big_endian>::add_reloc_stub( | |
793 | The_reloc_stub* stub, const The_reloc_stub_key& key) | |
794 | { | |
795 | gold_assert(stub->stub_type() == key.stub_type()); | |
796 | this->reloc_stubs_[key] = stub; | |
797 | ||
798 | // Assign stub offset early. We can do this because we never remove | |
799 | // reloc stubs and they are in the beginning of the stub table. | |
800 | this->reloc_stubs_size_ = align_address(this->reloc_stubs_size_, | |
801 | The_reloc_stub::STUB_ADDR_ALIGN); | |
802 | stub->set_offset(this->reloc_stubs_size_); | |
803 | this->reloc_stubs_size_ += stub->stub_size(); | |
804 | } | |
805 | ||
806 | ||
807 | // Relocate all stubs in this stub table. | |
808 | ||
809 | template<int size, bool big_endian> | |
810 | void | |
811 | Stub_table<size, big_endian>:: | |
812 | relocate_stubs(const The_relocate_info* relinfo, | |
813 | The_target_aarch64* target_aarch64, | |
814 | Output_section* output_section, | |
815 | unsigned char* view, | |
816 | AArch64_address address, | |
817 | section_size_type view_size) | |
818 | { | |
819 | // "view_size" is the total size of the stub_table. | |
820 | gold_assert(address == this->address() && | |
821 | view_size == static_cast<section_size_type>(this->data_size())); | |
822 | for(Reloc_stub_map_const_iter p = this->reloc_stubs_.begin(); | |
823 | p != this->reloc_stubs_.end(); ++p) | |
824 | relocate_stub(p->second, relinfo, target_aarch64, output_section, | |
825 | view, address, view_size); | |
826 | } | |
827 | ||
828 | ||
829 | // Relocate one stub. This is a helper for Stub_table::relocate_stubs(). | |
830 | ||
831 | template<int size, bool big_endian> | |
832 | void | |
833 | Stub_table<size, big_endian>:: | |
834 | relocate_stub(The_reloc_stub* stub, | |
835 | const The_relocate_info* relinfo, | |
836 | The_target_aarch64* target_aarch64, | |
837 | Output_section* output_section, | |
838 | unsigned char* view, | |
839 | AArch64_address address, | |
840 | section_size_type view_size) | |
841 | { | |
842 | // "offset" is the offset from the beginning of the stub_table. | |
843 | section_size_type offset = stub->offset(); | |
844 | section_size_type stub_size = stub->stub_size(); | |
845 | // "view_size" is the total size of the stub_table. | |
846 | gold_assert(offset + stub_size <= view_size); | |
847 | ||
848 | target_aarch64->relocate_stub(stub, relinfo, output_section, | |
849 | view + offset, address + offset, view_size); | |
850 | } | |
851 | ||
852 | ||
853 | // Write out the stubs to file. | |
854 | ||
855 | template<int size, bool big_endian> | |
856 | void | |
857 | Stub_table<size, big_endian>::do_write(Output_file* of) | |
858 | { | |
859 | off_t offset = this->offset(); | |
860 | const section_size_type oview_size = | |
861 | convert_to_section_size_type(this->data_size()); | |
862 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
863 | ||
864 | // Write relocation stubs. | |
865 | for (typename Reloc_stub_map::const_iterator p = this->reloc_stubs_.begin(); | |
866 | p != this->reloc_stubs_.end(); ++p) | |
867 | { | |
868 | The_reloc_stub* stub = p->second; | |
869 | AArch64_address address = this->address() + stub->offset(); | |
870 | gold_assert(address == | |
871 | align_address(address, The_reloc_stub::STUB_ADDR_ALIGN)); | |
872 | stub->write(oview + stub->offset(), stub->stub_size()); | |
873 | } | |
874 | ||
875 | of->write_output_view(this->offset(), oview_size, oview); | |
876 | } | |
877 | ||
878 | ||
879 | // AArch64_relobj class. | |
880 | ||
881 | template<int size, bool big_endian> | |
882 | class AArch64_relobj : public Sized_relobj_file<size, big_endian> | |
883 | { | |
884 | public: | |
885 | typedef AArch64_relobj<size, big_endian> This; | |
886 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
887 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
888 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
889 | typedef Stub_table<size, big_endian> The_stub_table; | |
890 | typedef std::vector<The_stub_table*> Stub_table_list; | |
891 | static const AArch64_address invalid_address = | |
892 | static_cast<AArch64_address>(-1); | |
893 | ||
894 | AArch64_relobj(const std::string& name, Input_file* input_file, off_t offset, | |
895 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
896 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
897 | stub_tables_() | |
898 | { } | |
899 | ||
900 | ~AArch64_relobj() | |
901 | { } | |
902 | ||
903 | // Return the stub table of the SHNDX-th section if there is one. | |
904 | The_stub_table* | |
905 | stub_table(unsigned int shndx) const | |
906 | { | |
907 | gold_assert(shndx < this->stub_tables_.size()); | |
908 | return this->stub_tables_[shndx]; | |
909 | } | |
910 | ||
911 | // Set STUB_TABLE to be the stub_table of the SHNDX-th section. | |
912 | void | |
913 | set_stub_table(unsigned int shndx, The_stub_table* stub_table) | |
914 | { | |
915 | gold_assert(shndx < this->stub_tables_.size()); | |
916 | this->stub_tables_[shndx] = stub_table; | |
917 | } | |
918 | ||
919 | // Scan all relocation sections for stub generation. | |
920 | void | |
921 | scan_sections_for_stubs(The_target_aarch64*, const Symbol_table*, | |
922 | const Layout*); | |
923 | ||
924 | // Whether a section is a scannable text section. | |
925 | bool | |
926 | text_section_is_scannable(const elfcpp::Shdr<size, big_endian>&, unsigned int, | |
927 | const Output_section*, const Symbol_table*); | |
928 | ||
929 | // Convert regular input section with index SHNDX to a relaxed section. | |
930 | void | |
931 | convert_input_section_to_relaxed_section(unsigned /* shndx */) | |
932 | { | |
933 | // The stubs have relocations and we need to process them after writing | |
934 | // out the stubs. So relocation now must follow section write. | |
935 | this->set_relocs_must_follow_section_writes(); | |
936 | } | |
937 | ||
938 | protected: | |
939 | // Post constructor setup. | |
940 | void | |
941 | do_setup() | |
942 | { | |
943 | // Call parent's setup method. | |
944 | Sized_relobj_file<size, big_endian>::do_setup(); | |
945 | ||
946 | // Initialize look-up tables. | |
947 | this->stub_tables_.resize(this->shnum()); | |
948 | } | |
949 | ||
950 | virtual void | |
951 | do_relocate_sections( | |
952 | const Symbol_table* symtab, const Layout* layout, | |
953 | const unsigned char* pshdrs, Output_file* of, | |
954 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
955 | ||
956 | private: | |
957 | // Whether a section needs to be scanned for relocation stubs. | |
958 | bool | |
959 | section_needs_reloc_stub_scanning(const elfcpp::Shdr<size, big_endian>&, | |
960 | const Relobj::Output_sections&, | |
961 | const Symbol_table*, const unsigned char*); | |
962 | ||
963 | // List of stub tables. | |
964 | Stub_table_list stub_tables_; | |
965 | }; // End of AArch64_relobj | |
966 | ||
967 | ||
968 | // Relocate sections. | |
969 | ||
970 | template<int size, bool big_endian> | |
971 | void | |
972 | AArch64_relobj<size, big_endian>::do_relocate_sections( | |
973 | const Symbol_table* symtab, const Layout* layout, | |
974 | const unsigned char* pshdrs, Output_file* of, | |
975 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
976 | { | |
977 | // Call parent to relocate sections. | |
978 | Sized_relobj_file<size, big_endian>::do_relocate_sections(symtab, layout, | |
979 | pshdrs, of, pviews); | |
980 | ||
981 | // We do not generate stubs if doing a relocatable link. | |
982 | if (parameters->options().relocatable()) | |
983 | return; | |
984 | ||
985 | Relocate_info<size, big_endian> relinfo; | |
986 | relinfo.symtab = symtab; | |
987 | relinfo.layout = layout; | |
988 | relinfo.object = this; | |
989 | ||
990 | // Relocate stub tables. | |
991 | unsigned int shnum = this->shnum(); | |
992 | The_target_aarch64* target = The_target_aarch64::current_target(); | |
993 | ||
994 | for (unsigned int i = 1; i < shnum; ++i) | |
995 | { | |
996 | The_aarch64_input_section* aarch64_input_section = | |
997 | target->find_aarch64_input_section(this, i); | |
998 | if (aarch64_input_section != NULL | |
999 | && aarch64_input_section->is_stub_table_owner() | |
1000 | && !aarch64_input_section->stub_table()->empty()) | |
1001 | { | |
1002 | Output_section* os = this->output_section(i); | |
1003 | gold_assert(os != NULL); | |
1004 | ||
1005 | relinfo.reloc_shndx = elfcpp::SHN_UNDEF; | |
1006 | relinfo.reloc_shdr = NULL; | |
1007 | relinfo.data_shndx = i; | |
1008 | relinfo.data_shdr = pshdrs + i * elfcpp::Elf_sizes<size>::shdr_size; | |
1009 | ||
1010 | typename Sized_relobj_file<size, big_endian>::View_size& | |
1011 | view_struct = (*pviews)[i]; | |
1012 | gold_assert(view_struct.view != NULL); | |
1013 | ||
1014 | The_stub_table* stub_table = aarch64_input_section->stub_table(); | |
1015 | off_t offset = stub_table->address() - view_struct.address; | |
1016 | unsigned char* view = view_struct.view + offset; | |
1017 | AArch64_address address = stub_table->address(); | |
1018 | section_size_type view_size = stub_table->data_size(); | |
1019 | stub_table->relocate_stubs(&relinfo, target, os, view, address, | |
1020 | view_size); | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | ||
1026 | // Determine if an input section is scannable for stub processing. SHDR is | |
1027 | // the header of the section and SHNDX is the section index. OS is the output | |
1028 | // section for the input section and SYMTAB is the global symbol table used to | |
1029 | // look up ICF information. | |
1030 | ||
1031 | template<int size, bool big_endian> | |
1032 | bool | |
1033 | AArch64_relobj<size, big_endian>::text_section_is_scannable( | |
1034 | const elfcpp::Shdr<size, big_endian>& text_shdr, | |
1035 | unsigned int text_shndx, | |
1036 | const Output_section* os, | |
1037 | const Symbol_table* symtab) | |
1038 | { | |
1039 | // Skip any empty sections, unallocated sections or sections whose | |
1040 | // type are not SHT_PROGBITS. | |
1041 | if (text_shdr.get_sh_size() == 0 | |
1042 | || (text_shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0 | |
1043 | || text_shdr.get_sh_type() != elfcpp::SHT_PROGBITS) | |
1044 | return false; | |
1045 | ||
1046 | // Skip any discarded or ICF'ed sections. | |
1047 | if (os == NULL || symtab->is_section_folded(this, text_shndx)) | |
1048 | return false; | |
1049 | ||
1050 | // Skip exception frame. | |
1051 | if (strcmp(os->name(), ".eh_frame") == 0) | |
1052 | return false ; | |
1053 | ||
1054 | gold_assert(!this->is_output_section_offset_invalid(text_shndx) || | |
1055 | os->find_relaxed_input_section(this, text_shndx) != NULL); | |
1056 | ||
1057 | return true; | |
1058 | } | |
1059 | ||
1060 | ||
1061 | // Determine if we want to scan the SHNDX-th section for relocation stubs. | |
1062 | // This is a helper for AArch64_relobj::scan_sections_for_stubs(). | |
1063 | ||
1064 | template<int size, bool big_endian> | |
1065 | bool | |
1066 | AArch64_relobj<size, big_endian>::section_needs_reloc_stub_scanning( | |
1067 | const elfcpp::Shdr<size, big_endian>& shdr, | |
1068 | const Relobj::Output_sections& out_sections, | |
1069 | const Symbol_table* symtab, | |
1070 | const unsigned char* pshdrs) | |
1071 | { | |
1072 | unsigned int sh_type = shdr.get_sh_type(); | |
1073 | if (sh_type != elfcpp::SHT_RELA) | |
1074 | return false; | |
1075 | ||
1076 | // Ignore empty section. | |
1077 | off_t sh_size = shdr.get_sh_size(); | |
1078 | if (sh_size == 0) | |
1079 | return false; | |
1080 | ||
1081 | // Ignore reloc section with unexpected symbol table. The | |
1082 | // error will be reported in the final link. | |
1083 | if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx()) | |
1084 | return false; | |
1085 | ||
1086 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
1087 | unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
1088 | ||
1089 | // Ignore reloc section with unexpected entsize or uneven size. | |
1090 | // The error will be reported in the final link. | |
1091 | if (reloc_size != shdr.get_sh_entsize() || sh_size % reloc_size != 0) | |
1092 | return false; | |
1093 | ||
1094 | // Ignore reloc section with bad info. This error will be | |
1095 | // reported in the final link. | |
1096 | unsigned int text_shndx = this->adjust_shndx(shdr.get_sh_info()); | |
1097 | if (text_shndx >= this->shnum()) | |
1098 | return false; | |
1099 | ||
1100 | const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1101 | const elfcpp::Shdr<size, big_endian> text_shdr(pshdrs + | |
1102 | text_shndx * shdr_size); | |
1103 | return this->text_section_is_scannable(text_shdr, text_shndx, | |
1104 | out_sections[text_shndx], symtab); | |
1105 | } | |
1106 | ||
1107 | ||
1108 | // Scan relocations for stub generation. | |
1109 | ||
1110 | template<int size, bool big_endian> | |
1111 | void | |
1112 | AArch64_relobj<size, big_endian>::scan_sections_for_stubs( | |
1113 | The_target_aarch64* target, | |
1114 | const Symbol_table* symtab, | |
1115 | const Layout* layout) | |
1116 | { | |
1117 | unsigned int shnum = this->shnum(); | |
1118 | const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1119 | ||
1120 | // Read the section headers. | |
1121 | const unsigned char* pshdrs = this->get_view(this->elf_file()->shoff(), | |
1122 | shnum * shdr_size, | |
1123 | true, true); | |
1124 | ||
1125 | // To speed up processing, we set up hash tables for fast lookup of | |
1126 | // input offsets to output addresses. | |
1127 | this->initialize_input_to_output_maps(); | |
1128 | ||
1129 | const Relobj::Output_sections& out_sections(this->output_sections()); | |
1130 | ||
1131 | Relocate_info<size, big_endian> relinfo; | |
1132 | relinfo.symtab = symtab; | |
1133 | relinfo.layout = layout; | |
1134 | relinfo.object = this; | |
1135 | ||
1136 | // Do relocation stubs scanning. | |
1137 | const unsigned char* p = pshdrs + shdr_size; | |
1138 | for (unsigned int i = 1; i < shnum; ++i, p += shdr_size) | |
1139 | { | |
1140 | const elfcpp::Shdr<size, big_endian> shdr(p); | |
1141 | if (this->section_needs_reloc_stub_scanning(shdr, out_sections, symtab, | |
1142 | pshdrs)) | |
1143 | { | |
1144 | unsigned int index = this->adjust_shndx(shdr.get_sh_info()); | |
1145 | AArch64_address output_offset = | |
1146 | this->get_output_section_offset(index); | |
1147 | AArch64_address output_address; | |
1148 | if (output_offset != invalid_address) | |
1149 | { | |
1150 | output_address = out_sections[index]->address() + output_offset; | |
1151 | } | |
1152 | else | |
1153 | { | |
1154 | // Currently this only happens for a relaxed section. | |
1155 | const Output_relaxed_input_section* poris = | |
1156 | out_sections[index]->find_relaxed_input_section(this, index); | |
1157 | gold_assert(poris != NULL); | |
1158 | output_address = poris->address(); | |
1159 | } | |
1160 | ||
1161 | // Get the relocations. | |
1162 | const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(), | |
1163 | shdr.get_sh_size(), | |
1164 | true, false); | |
1165 | ||
1166 | // Get the section contents. | |
1167 | section_size_type input_view_size = 0; | |
1168 | const unsigned char* input_view = | |
1169 | this->section_contents(index, &input_view_size, false); | |
1170 | ||
1171 | relinfo.reloc_shndx = i; | |
1172 | relinfo.data_shndx = index; | |
1173 | unsigned int sh_type = shdr.get_sh_type(); | |
1174 | unsigned int reloc_size; | |
1175 | gold_assert (sh_type == elfcpp::SHT_RELA); | |
1176 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
1177 | ||
1178 | Output_section* os = out_sections[index]; | |
1179 | target->scan_section_for_stubs(&relinfo, sh_type, prelocs, | |
1180 | shdr.get_sh_size() / reloc_size, | |
1181 | os, | |
1182 | output_offset == invalid_address, | |
1183 | input_view, output_address, | |
1184 | input_view_size); | |
1185 | } | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | ||
1190 | // A class to wrap an ordinary input section containing executable code. | |
1191 | ||
1192 | template<int size, bool big_endian> | |
1193 | class AArch64_input_section : public Output_relaxed_input_section | |
1194 | { | |
1195 | public: | |
1196 | typedef Stub_table<size, big_endian> The_stub_table; | |
1197 | ||
1198 | AArch64_input_section(Relobj* relobj, unsigned int shndx) | |
1199 | : Output_relaxed_input_section(relobj, shndx, 1), | |
1200 | stub_table_(NULL), | |
1201 | original_contents_(NULL), original_size_(0), | |
1202 | original_addralign_(1) | |
1203 | { } | |
1204 | ||
1205 | ~AArch64_input_section() | |
1206 | { delete[] this->original_contents_; } | |
1207 | ||
1208 | // Initialize. | |
1209 | void | |
1210 | init(); | |
1211 | ||
1212 | // Set the stub_table. | |
1213 | void | |
1214 | set_stub_table(The_stub_table* st) | |
1215 | { this->stub_table_ = st; } | |
1216 | ||
1217 | // Whether this is a stub table owner. | |
1218 | bool | |
1219 | is_stub_table_owner() const | |
1220 | { return this->stub_table_ != NULL && this->stub_table_->owner() == this; } | |
1221 | ||
1222 | // Return the original size of the section. | |
1223 | uint32_t | |
1224 | original_size() const | |
1225 | { return this->original_size_; } | |
1226 | ||
1227 | // Return the stub table. | |
1228 | The_stub_table* | |
1229 | stub_table() | |
1230 | { return stub_table_; } | |
1231 | ||
1232 | protected: | |
1233 | // Write out this input section. | |
1234 | void | |
1235 | do_write(Output_file*); | |
1236 | ||
1237 | // Return required alignment of this. | |
1238 | uint64_t | |
1239 | do_addralign() const | |
1240 | { | |
1241 | if (this->is_stub_table_owner()) | |
1242 | return std::max(this->stub_table_->addralign(), | |
1243 | static_cast<uint64_t>(this->original_addralign_)); | |
1244 | else | |
1245 | return this->original_addralign_; | |
1246 | } | |
1247 | ||
1248 | // Finalize data size. | |
1249 | void | |
1250 | set_final_data_size(); | |
1251 | ||
1252 | // Reset address and file offset. | |
1253 | void | |
1254 | do_reset_address_and_file_offset(); | |
1255 | ||
1256 | // Output offset. | |
1257 | bool | |
1258 | do_output_offset(const Relobj* object, unsigned int shndx, | |
1259 | section_offset_type offset, | |
1260 | section_offset_type* poutput) const | |
1261 | { | |
1262 | if ((object == this->relobj()) | |
1263 | && (shndx == this->shndx()) | |
1264 | && (offset >= 0) | |
1265 | && (offset <= | |
1266 | convert_types<section_offset_type, uint32_t>(this->original_size_))) | |
1267 | { | |
1268 | *poutput = offset; | |
1269 | return true; | |
1270 | } | |
1271 | else | |
1272 | return false; | |
1273 | } | |
1274 | ||
1275 | private: | |
1276 | // Copying is not allowed. | |
1277 | AArch64_input_section(const AArch64_input_section&); | |
1278 | AArch64_input_section& operator=(const AArch64_input_section&); | |
1279 | ||
1280 | // The relocation stubs. | |
1281 | The_stub_table* stub_table_; | |
1282 | // Original section contents. We have to make a copy here since the file | |
1283 | // containing the original section may not be locked when we need to access | |
1284 | // the contents. | |
1285 | unsigned char* original_contents_; | |
1286 | // Section size of the original input section. | |
1287 | uint32_t original_size_; | |
1288 | // Address alignment of the original input section. | |
1289 | uint32_t original_addralign_; | |
1290 | }; // End of AArch64_input_section | |
1291 | ||
1292 | ||
1293 | // Finalize data size. | |
1294 | ||
1295 | template<int size, bool big_endian> | |
1296 | void | |
1297 | AArch64_input_section<size, big_endian>::set_final_data_size() | |
1298 | { | |
1299 | off_t off = convert_types<off_t, uint64_t>(this->original_size_); | |
1300 | ||
1301 | if (this->is_stub_table_owner()) | |
1302 | { | |
1303 | this->stub_table_->finalize_data_size(); | |
1304 | off = align_address(off, this->stub_table_->addralign()); | |
1305 | off += this->stub_table_->data_size(); | |
1306 | } | |
1307 | this->set_data_size(off); | |
1308 | } | |
1309 | ||
1310 | ||
1311 | // Reset address and file offset. | |
1312 | ||
1313 | template<int size, bool big_endian> | |
1314 | void | |
1315 | AArch64_input_section<size, big_endian>::do_reset_address_and_file_offset() | |
1316 | { | |
1317 | // Size of the original input section contents. | |
1318 | off_t off = convert_types<off_t, uint64_t>(this->original_size_); | |
1319 | ||
1320 | // If this is a stub table owner, account for the stub table size. | |
1321 | if (this->is_stub_table_owner()) | |
1322 | { | |
1323 | The_stub_table* stub_table = this->stub_table_; | |
1324 | ||
1325 | // Reset the stub table's address and file offset. The | |
1326 | // current data size for child will be updated after that. | |
1327 | stub_table_->reset_address_and_file_offset(); | |
1328 | off = align_address(off, stub_table_->addralign()); | |
1329 | off += stub_table->current_data_size(); | |
1330 | } | |
1331 | ||
1332 | this->set_current_data_size(off); | |
1333 | } | |
1334 | ||
1335 | ||
1336 | // Initialize an Arm_input_section. | |
1337 | ||
1338 | template<int size, bool big_endian> | |
1339 | void | |
1340 | AArch64_input_section<size, big_endian>::init() | |
1341 | { | |
1342 | Relobj* relobj = this->relobj(); | |
1343 | unsigned int shndx = this->shndx(); | |
1344 | ||
1345 | // We have to cache original size, alignment and contents to avoid locking | |
1346 | // the original file. | |
1347 | this->original_addralign_ = | |
1348 | convert_types<uint32_t, uint64_t>(relobj->section_addralign(shndx)); | |
1349 | ||
1350 | // This is not efficient but we expect only a small number of relaxed | |
1351 | // input sections for stubs. | |
1352 | section_size_type section_size; | |
1353 | const unsigned char* section_contents = | |
1354 | relobj->section_contents(shndx, §ion_size, false); | |
1355 | this->original_size_ = | |
1356 | convert_types<uint32_t, uint64_t>(relobj->section_size(shndx)); | |
1357 | ||
1358 | gold_assert(this->original_contents_ == NULL); | |
1359 | this->original_contents_ = new unsigned char[section_size]; | |
1360 | memcpy(this->original_contents_, section_contents, section_size); | |
1361 | ||
1362 | // We want to make this look like the original input section after | |
1363 | // output sections are finalized. | |
1364 | Output_section* os = relobj->output_section(shndx); | |
1365 | off_t offset = relobj->output_section_offset(shndx); | |
1366 | gold_assert(os != NULL && !relobj->is_output_section_offset_invalid(shndx)); | |
1367 | this->set_address(os->address() + offset); | |
1368 | this->set_file_offset(os->offset() + offset); | |
1369 | this->set_current_data_size(this->original_size_); | |
1370 | this->finalize_data_size(); | |
1371 | } | |
1372 | ||
1373 | ||
1374 | // Write data to output file. | |
1375 | ||
1376 | template<int size, bool big_endian> | |
1377 | void | |
1378 | AArch64_input_section<size, big_endian>::do_write(Output_file* of) | |
1379 | { | |
1380 | // We have to write out the original section content. | |
1381 | gold_assert(this->original_contents_ != NULL); | |
1382 | of->write(this->offset(), this->original_contents_, | |
1383 | this->original_size_); | |
1384 | ||
1385 | // If this owns a stub table and it is not empty, write it. | |
1386 | if (this->is_stub_table_owner() && !this->stub_table_->empty()) | |
1387 | this->stub_table_->write(of); | |
1388 | } | |
1389 | ||
1390 | ||
1391 | // Arm output section class. This is defined mainly to add a number of stub | |
1392 | // generation methods. | |
1393 | ||
1394 | template<int size, bool big_endian> | |
1395 | class AArch64_output_section : public Output_section | |
1396 | { | |
1397 | public: | |
1398 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
1399 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; | |
1400 | typedef Stub_table<size, big_endian> The_stub_table; | |
1401 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
1402 | ||
1403 | public: | |
1404 | AArch64_output_section(const char* name, elfcpp::Elf_Word type, | |
1405 | elfcpp::Elf_Xword flags) | |
1406 | : Output_section(name, type, flags) | |
1407 | { } | |
1408 | ||
1409 | ~AArch64_output_section() {} | |
1410 | ||
1411 | // Group input sections for stub generation. | |
1412 | void | |
1413 | group_sections(section_size_type, bool, Target_aarch64<size, big_endian>*, | |
1414 | const Task*); | |
1415 | ||
1416 | private: | |
1417 | typedef Output_section::Input_section Input_section; | |
1418 | typedef Output_section::Input_section_list Input_section_list; | |
1419 | ||
1420 | // Create a stub group. | |
1421 | void | |
1422 | create_stub_group(Input_section_list::const_iterator, | |
1423 | Input_section_list::const_iterator, | |
1424 | Input_section_list::const_iterator, | |
1425 | The_target_aarch64*, | |
1426 | std::vector<Output_relaxed_input_section*>&, | |
1427 | const Task*); | |
1428 | }; // End of AArch64_output_section | |
1429 | ||
1430 | ||
1431 | // Create a stub group for input sections from FIRST to LAST. OWNER points to | |
1432 | // the input section that will be the owner of the stub table. | |
1433 | ||
1434 | template<int size, bool big_endian> void | |
1435 | AArch64_output_section<size, big_endian>::create_stub_group( | |
1436 | Input_section_list::const_iterator first, | |
1437 | Input_section_list::const_iterator last, | |
1438 | Input_section_list::const_iterator owner, | |
1439 | The_target_aarch64* target, | |
1440 | std::vector<Output_relaxed_input_section*>& new_relaxed_sections, | |
1441 | const Task* task) | |
1442 | { | |
1443 | // Currently we convert ordinary input sections into relaxed sections only | |
1444 | // at this point. | |
1445 | The_aarch64_input_section* input_section; | |
1446 | if (owner->is_relaxed_input_section()) | |
1447 | gold_unreachable(); | |
1448 | else | |
1449 | { | |
1450 | gold_assert(owner->is_input_section()); | |
1451 | // Create a new relaxed input section. We need to lock the original | |
1452 | // file. | |
1453 | Task_lock_obj<Object> tl(task, owner->relobj()); | |
1454 | input_section = | |
1455 | target->new_aarch64_input_section(owner->relobj(), owner->shndx()); | |
1456 | new_relaxed_sections.push_back(input_section); | |
1457 | } | |
1458 | ||
1459 | // Create a stub table. | |
1460 | The_stub_table* stub_table = | |
1461 | target->new_stub_table(input_section); | |
1462 | ||
1463 | input_section->set_stub_table(stub_table); | |
1464 | ||
1465 | Input_section_list::const_iterator p = first; | |
1466 | // Look for input sections or relaxed input sections in [first ... last]. | |
1467 | do | |
1468 | { | |
1469 | if (p->is_input_section() || p->is_relaxed_input_section()) | |
1470 | { | |
1471 | // The stub table information for input sections live | |
1472 | // in their objects. | |
1473 | The_aarch64_relobj* aarch64_relobj = | |
1474 | static_cast<The_aarch64_relobj*>(p->relobj()); | |
1475 | aarch64_relobj->set_stub_table(p->shndx(), stub_table); | |
1476 | } | |
1477 | } | |
1478 | while (p++ != last); | |
1479 | } | |
1480 | ||
1481 | ||
1482 | // Group input sections for stub generation. GROUP_SIZE is roughly the limit of | |
1483 | // stub groups. We grow a stub group by adding input section until the size is | |
1484 | // just below GROUP_SIZE. The last input section will be converted into a stub | |
1485 | // table owner. If STUB_ALWAYS_AFTER_BRANCH is false, we also add input sectiond | |
1486 | // after the stub table, effectively doubling the group size. | |
1487 | // | |
1488 | // This is similar to the group_sections() function in elf32-arm.c but is | |
1489 | // implemented differently. | |
1490 | ||
1491 | template<int size, bool big_endian> | |
1492 | void AArch64_output_section<size, big_endian>::group_sections( | |
1493 | section_size_type group_size, | |
1494 | bool stubs_always_after_branch, | |
1495 | Target_aarch64<size, big_endian>* target, | |
1496 | const Task* task) | |
1497 | { | |
1498 | typedef enum | |
1499 | { | |
1500 | NO_GROUP, | |
1501 | FINDING_STUB_SECTION, | |
1502 | HAS_STUB_SECTION | |
1503 | } State; | |
1504 | ||
1505 | std::vector<Output_relaxed_input_section*> new_relaxed_sections; | |
1506 | ||
1507 | State state = NO_GROUP; | |
1508 | section_size_type off = 0; | |
1509 | section_size_type group_begin_offset = 0; | |
1510 | section_size_type group_end_offset = 0; | |
1511 | section_size_type stub_table_end_offset = 0; | |
1512 | Input_section_list::const_iterator group_begin = | |
1513 | this->input_sections().end(); | |
1514 | Input_section_list::const_iterator stub_table = | |
1515 | this->input_sections().end(); | |
1516 | Input_section_list::const_iterator group_end = this->input_sections().end(); | |
1517 | for (Input_section_list::const_iterator p = this->input_sections().begin(); | |
1518 | p != this->input_sections().end(); | |
1519 | ++p) | |
1520 | { | |
1521 | section_size_type section_begin_offset = | |
1522 | align_address(off, p->addralign()); | |
1523 | section_size_type section_end_offset = | |
1524 | section_begin_offset + p->data_size(); | |
1525 | ||
1526 | // Check to see if we should group the previously seen sections. | |
1527 | switch (state) | |
1528 | { | |
1529 | case NO_GROUP: | |
1530 | break; | |
1531 | ||
1532 | case FINDING_STUB_SECTION: | |
1533 | // Adding this section makes the group larger than GROUP_SIZE. | |
1534 | if (section_end_offset - group_begin_offset >= group_size) | |
1535 | { | |
1536 | if (stubs_always_after_branch) | |
1537 | { | |
1538 | gold_assert(group_end != this->input_sections().end()); | |
1539 | this->create_stub_group(group_begin, group_end, group_end, | |
1540 | target, new_relaxed_sections, | |
1541 | task); | |
1542 | state = NO_GROUP; | |
1543 | } | |
1544 | else | |
1545 | { | |
1546 | // Input sections up to stub_group_size bytes after the stub | |
1547 | // table can be handled by it too. | |
1548 | state = HAS_STUB_SECTION; | |
1549 | stub_table = group_end; | |
1550 | stub_table_end_offset = group_end_offset; | |
1551 | } | |
1552 | } | |
1553 | break; | |
1554 | ||
1555 | case HAS_STUB_SECTION: | |
1556 | // Adding this section makes the post stub-section group larger | |
1557 | // than GROUP_SIZE. | |
1558 | gold_unreachable(); | |
1559 | // NOT SUPPORTED YET. For completeness only. | |
1560 | if (section_end_offset - stub_table_end_offset >= group_size) | |
1561 | { | |
1562 | gold_assert(group_end != this->input_sections().end()); | |
1563 | this->create_stub_group(group_begin, group_end, stub_table, | |
1564 | target, new_relaxed_sections, task); | |
1565 | state = NO_GROUP; | |
1566 | } | |
1567 | break; | |
1568 | ||
1569 | default: | |
1570 | gold_unreachable(); | |
1571 | } | |
1572 | ||
1573 | // If we see an input section and currently there is no group, start | |
1574 | // a new one. Skip any empty sections. We look at the data size | |
1575 | // instead of calling p->relobj()->section_size() to avoid locking. | |
1576 | if ((p->is_input_section() || p->is_relaxed_input_section()) | |
1577 | && (p->data_size() != 0)) | |
1578 | { | |
1579 | if (state == NO_GROUP) | |
1580 | { | |
1581 | state = FINDING_STUB_SECTION; | |
1582 | group_begin = p; | |
1583 | group_begin_offset = section_begin_offset; | |
1584 | } | |
1585 | ||
1586 | // Keep track of the last input section seen. | |
1587 | group_end = p; | |
1588 | group_end_offset = section_end_offset; | |
1589 | } | |
1590 | ||
1591 | off = section_end_offset; | |
1592 | } | |
1593 | ||
1594 | // Create a stub group for any ungrouped sections. | |
1595 | if (state == FINDING_STUB_SECTION || state == HAS_STUB_SECTION) | |
1596 | { | |
1597 | gold_assert(group_end != this->input_sections().end()); | |
1598 | this->create_stub_group(group_begin, group_end, | |
1599 | (state == FINDING_STUB_SECTION | |
1600 | ? group_end | |
1601 | : stub_table), | |
1602 | target, new_relaxed_sections, task); | |
1603 | } | |
8e33481e | 1604 | |
83a01957 HS |
1605 | if (!new_relaxed_sections.empty()) |
1606 | this->convert_input_sections_to_relaxed_sections(new_relaxed_sections); | |
1607 | ||
1608 | // Update the section offsets | |
1609 | for (size_t i = 0; i < new_relaxed_sections.size(); ++i) | |
1610 | { | |
1611 | The_aarch64_relobj* relobj = static_cast<The_aarch64_relobj*>( | |
1612 | new_relaxed_sections[i]->relobj()); | |
1613 | unsigned int shndx = new_relaxed_sections[i]->shndx(); | |
1614 | // Tell AArch64_relobj that this input section is converted. | |
1615 | relobj->convert_input_section_to_relaxed_section(shndx); | |
1616 | } | |
1617 | } // End of AArch64_output_section::group_sections | |
3a531937 | 1618 | |
053a4d68 | 1619 | |
9363c7c3 JY |
1620 | AArch64_reloc_property_table* aarch64_reloc_property_table = NULL; |
1621 | ||
3a531937 | 1622 | |
053a4d68 JY |
1623 | // The aarch64 target class. |
1624 | // See the ABI at | |
1625 | // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf | |
1626 | template<int size, bool big_endian> | |
1627 | class Target_aarch64 : public Sized_target<size, big_endian> | |
1628 | { | |
1629 | public: | |
83a01957 | 1630 | typedef Target_aarch64<size, big_endian> This; |
053a4d68 JY |
1631 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
1632 | Reloc_section; | |
83a01957 | 1633 | typedef Relocate_info<size, big_endian> The_relocate_info; |
053a4d68 | 1634 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
83a01957 HS |
1635 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; |
1636 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
1637 | typedef typename The_reloc_stub::Stub_type The_reloc_stub_type; | |
1638 | typedef typename Reloc_stub<size, big_endian>::Key The_reloc_stub_key; | |
1639 | typedef Stub_table<size, big_endian> The_stub_table; | |
1640 | typedef std::vector<The_stub_table*> Stub_table_list; | |
1641 | typedef typename Stub_table_list::iterator Stub_table_iterator; | |
1642 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
1643 | typedef AArch64_output_section<size, big_endian> The_aarch64_output_section; | |
1644 | typedef Unordered_map<Section_id, | |
1645 | AArch64_input_section<size, big_endian>*, | |
1646 | Section_id_hash> AArch64_input_section_map; | |
8e33481e | 1647 | const static int TCB_SIZE = size / 8 * 2; |
053a4d68 JY |
1648 | |
1649 | Target_aarch64(const Target::Target_info* info = &aarch64_info) | |
1650 | : Sized_target<size, big_endian>(info), | |
3a531937 JY |
1651 | got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL), |
1652 | got_tlsdesc_(NULL), global_offset_table_(NULL), rela_dyn_(NULL), | |
1653 | rela_irelative_(NULL), copy_relocs_(elfcpp::R_AARCH64_COPY), | |
83a01957 HS |
1654 | got_mod_index_offset_(-1U), |
1655 | tlsdesc_reloc_info_(), tls_base_symbol_defined_(false), | |
1656 | stub_tables_(), aarch64_input_section_map_() | |
053a4d68 JY |
1657 | { } |
1658 | ||
1659 | // Scan the relocations to determine unreferenced sections for | |
1660 | // garbage collection. | |
1661 | void | |
1662 | gc_process_relocs(Symbol_table* symtab, | |
1663 | Layout* layout, | |
1664 | Sized_relobj_file<size, big_endian>* object, | |
1665 | unsigned int data_shndx, | |
1666 | unsigned int sh_type, | |
1667 | const unsigned char* prelocs, | |
1668 | size_t reloc_count, | |
1669 | Output_section* output_section, | |
1670 | bool needs_special_offset_handling, | |
1671 | size_t local_symbol_count, | |
1672 | const unsigned char* plocal_symbols); | |
1673 | ||
1674 | // Scan the relocations to look for symbol adjustments. | |
1675 | void | |
1676 | scan_relocs(Symbol_table* symtab, | |
1677 | Layout* layout, | |
1678 | Sized_relobj_file<size, big_endian>* object, | |
1679 | unsigned int data_shndx, | |
1680 | unsigned int sh_type, | |
1681 | const unsigned char* prelocs, | |
1682 | size_t reloc_count, | |
1683 | Output_section* output_section, | |
1684 | bool needs_special_offset_handling, | |
1685 | size_t local_symbol_count, | |
1686 | const unsigned char* plocal_symbols); | |
1687 | ||
1688 | // Finalize the sections. | |
1689 | void | |
1690 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); | |
1691 | ||
3a531937 JY |
1692 | // Return the value to use for a dynamic which requires special |
1693 | // treatment. | |
1694 | uint64_t | |
1695 | do_dynsym_value(const Symbol*) const; | |
1696 | ||
053a4d68 JY |
1697 | // Relocate a section. |
1698 | void | |
1699 | relocate_section(const Relocate_info<size, big_endian>*, | |
1700 | unsigned int sh_type, | |
1701 | const unsigned char* prelocs, | |
1702 | size_t reloc_count, | |
1703 | Output_section* output_section, | |
1704 | bool needs_special_offset_handling, | |
1705 | unsigned char* view, | |
1706 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1707 | section_size_type view_size, | |
1708 | const Reloc_symbol_changes*); | |
1709 | ||
1710 | // Scan the relocs during a relocatable link. | |
1711 | void | |
1712 | scan_relocatable_relocs(Symbol_table* symtab, | |
1713 | Layout* layout, | |
1714 | Sized_relobj_file<size, big_endian>* object, | |
1715 | unsigned int data_shndx, | |
1716 | unsigned int sh_type, | |
1717 | const unsigned char* prelocs, | |
1718 | size_t reloc_count, | |
1719 | Output_section* output_section, | |
1720 | bool needs_special_offset_handling, | |
1721 | size_t local_symbol_count, | |
1722 | const unsigned char* plocal_symbols, | |
1723 | Relocatable_relocs*); | |
1724 | ||
1725 | // Relocate a section during a relocatable link. | |
1726 | void | |
1727 | relocate_relocs( | |
1728 | const Relocate_info<size, big_endian>*, | |
1729 | unsigned int sh_type, | |
1730 | const unsigned char* prelocs, | |
1731 | size_t reloc_count, | |
1732 | Output_section* output_section, | |
1733 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
1734 | const Relocatable_relocs*, | |
1735 | unsigned char* view, | |
1736 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
1737 | section_size_type view_size, | |
1738 | unsigned char* reloc_view, | |
1739 | section_size_type reloc_view_size); | |
1740 | ||
3a531937 JY |
1741 | // Return the symbol index to use for a target specific relocation. |
1742 | // The only target specific relocation is R_AARCH64_TLSDESC for a | |
1743 | // local symbol, which is an absolute reloc. | |
1744 | unsigned int | |
1745 | do_reloc_symbol_index(void*, unsigned int r_type) const | |
1746 | { | |
1747 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | // Return the addend to use for a target specific relocation. | |
1752 | typename elfcpp::Elf_types<size>::Elf_Addr | |
1753 | do_reloc_addend(void* arg, unsigned int r_type, | |
1754 | typename elfcpp::Elf_types<size>::Elf_Addr addend) const; | |
1755 | ||
9363c7c3 JY |
1756 | // Return the PLT section. |
1757 | uint64_t | |
1758 | do_plt_address_for_global(const Symbol* gsym) const | |
1759 | { return this->plt_section()->address_for_global(gsym); } | |
1760 | ||
1761 | uint64_t | |
1762 | do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const | |
1763 | { return this->plt_section()->address_for_local(relobj, symndx); } | |
1764 | ||
053a4d68 JY |
1765 | // Return the number of entries in the PLT. |
1766 | unsigned int | |
1767 | plt_entry_count() const; | |
1768 | ||
1769 | //Return the offset of the first non-reserved PLT entry. | |
1770 | unsigned int | |
1771 | first_plt_entry_offset() const; | |
1772 | ||
1773 | // Return the size of each PLT entry. | |
1774 | unsigned int | |
1775 | plt_entry_size() const; | |
1776 | ||
83a01957 HS |
1777 | // Create a stub table. |
1778 | The_stub_table* | |
1779 | new_stub_table(The_aarch64_input_section*); | |
1780 | ||
1781 | // Create an aarch64 input section. | |
1782 | The_aarch64_input_section* | |
1783 | new_aarch64_input_section(Relobj*, unsigned int); | |
1784 | ||
1785 | // Find an aarch64 input section instance for a given OBJ and SHNDX. | |
1786 | The_aarch64_input_section* | |
1787 | find_aarch64_input_section(Relobj*, unsigned int) const; | |
1788 | ||
1789 | // Return the thread control block size. | |
8e33481e HS |
1790 | unsigned int |
1791 | tcb_size() const { return This::TCB_SIZE; } | |
1792 | ||
83a01957 HS |
1793 | // Scan a section for stub generation. |
1794 | void | |
1795 | scan_section_for_stubs(const Relocate_info<size, big_endian>*, unsigned int, | |
1796 | const unsigned char*, size_t, Output_section*, | |
1797 | bool, const unsigned char*, | |
1798 | Address, | |
1799 | section_size_type); | |
1800 | ||
1801 | // Scan a relocation section for stub. | |
1802 | template<int sh_type> | |
1803 | void | |
1804 | scan_reloc_section_for_stubs( | |
1805 | const The_relocate_info* relinfo, | |
1806 | const unsigned char* prelocs, | |
1807 | size_t reloc_count, | |
1808 | Output_section* output_section, | |
1809 | bool needs_special_offset_handling, | |
1810 | const unsigned char* view, | |
1811 | Address view_address, | |
1812 | section_size_type); | |
1813 | ||
1814 | // Relocate a single stub. | |
1815 | void | |
1816 | relocate_stub(The_reloc_stub*, const Relocate_info<size, big_endian>*, | |
1817 | Output_section*, unsigned char*, Address, | |
1818 | section_size_type); | |
1819 | ||
1820 | // Get the default AArch64 target. | |
1821 | static This* | |
1822 | current_target() | |
1823 | { | |
1824 | gold_assert(parameters->target().machine_code() == elfcpp::EM_AARCH64 | |
1825 | && parameters->target().get_size() == size | |
1826 | && parameters->target().is_big_endian() == big_endian); | |
1827 | return static_cast<This*>(parameters->sized_target<size, big_endian>()); | |
1828 | } | |
1829 | ||
9363c7c3 JY |
1830 | protected: |
1831 | void | |
1832 | do_select_as_default_target() | |
1833 | { | |
1834 | gold_assert(aarch64_reloc_property_table == NULL); | |
1835 | aarch64_reloc_property_table = new AArch64_reloc_property_table(); | |
1836 | } | |
1837 | ||
3a531937 JY |
1838 | // Add a new reloc argument, returning the index in the vector. |
1839 | size_t | |
1840 | add_tlsdesc_info(Sized_relobj_file<size, big_endian>* object, | |
1841 | unsigned int r_sym) | |
1842 | { | |
1843 | this->tlsdesc_reloc_info_.push_back(Tlsdesc_info(object, r_sym)); | |
1844 | return this->tlsdesc_reloc_info_.size() - 1; | |
1845 | } | |
1846 | ||
9363c7c3 | 1847 | virtual Output_data_plt_aarch64<size, big_endian>* |
3a531937 JY |
1848 | do_make_data_plt(Layout* layout, |
1849 | Output_data_got_aarch64<size, big_endian>* got, | |
1850 | Output_data_space* got_plt, | |
1851 | Output_data_space* got_irelative) | |
9363c7c3 | 1852 | { |
3a531937 JY |
1853 | return new Output_data_plt_aarch64_standard<size, big_endian>( |
1854 | layout, got, got_plt, got_irelative); | |
9363c7c3 JY |
1855 | } |
1856 | ||
83a01957 HS |
1857 | |
1858 | // do_make_elf_object to override the same function in the base class. | |
1859 | Object* | |
1860 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
1861 | const elfcpp::Ehdr<size, big_endian>&); | |
1862 | ||
9363c7c3 | 1863 | Output_data_plt_aarch64<size, big_endian>* |
3a531937 JY |
1864 | make_data_plt(Layout* layout, |
1865 | Output_data_got_aarch64<size, big_endian>* got, | |
1866 | Output_data_space* got_plt, | |
1867 | Output_data_space* got_irelative) | |
9363c7c3 | 1868 | { |
3a531937 | 1869 | return this->do_make_data_plt(layout, got, got_plt, got_irelative); |
9363c7c3 JY |
1870 | } |
1871 | ||
83a01957 HS |
1872 | // We only need to generate stubs, and hence perform relaxation if we are |
1873 | // not doing relocatable linking. | |
1874 | virtual bool | |
1875 | do_may_relax() const | |
1876 | { return !parameters->options().relocatable(); } | |
1877 | ||
1878 | // Relaxation hook. This is where we do stub generation. | |
1879 | virtual bool | |
1880 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
1881 | ||
1882 | void | |
1883 | group_sections(Layout* layout, | |
1884 | section_size_type group_size, | |
1885 | bool stubs_always_after_branch, | |
1886 | const Task* task); | |
1887 | ||
1888 | void | |
1889 | scan_reloc_for_stub(const The_relocate_info*, unsigned int, | |
1890 | const Sized_symbol<size>*, unsigned int, | |
1891 | const Symbol_value<size>*, | |
1892 | typename elfcpp::Elf_types<size>::Elf_Swxword, | |
1893 | Address Elf_Addr); | |
1894 | ||
1895 | // Make an output section. | |
1896 | Output_section* | |
1897 | do_make_output_section(const char* name, elfcpp::Elf_Word type, | |
1898 | elfcpp::Elf_Xword flags) | |
1899 | { return new The_aarch64_output_section(name, type, flags); } | |
1900 | ||
053a4d68 JY |
1901 | private: |
1902 | // The class which scans relocations. | |
1903 | class Scan | |
1904 | { | |
1905 | public: | |
1906 | Scan() | |
1907 | : issued_non_pic_error_(false) | |
1908 | { } | |
1909 | ||
053a4d68 JY |
1910 | inline void |
1911 | local(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
1912 | Sized_relobj_file<size, big_endian>* object, | |
1913 | unsigned int data_shndx, | |
1914 | Output_section* output_section, | |
1915 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1916 | const elfcpp::Sym<size, big_endian>& lsym, | |
1917 | bool is_discarded); | |
1918 | ||
1919 | inline void | |
1920 | global(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
1921 | Sized_relobj_file<size, big_endian>* object, | |
1922 | unsigned int data_shndx, | |
1923 | Output_section* output_section, | |
1924 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1925 | Symbol* gsym); | |
1926 | ||
1927 | inline bool | |
1928 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
1929 | Target_aarch64<size, big_endian>* , |
1930 | Sized_relobj_file<size, big_endian>* , | |
1931 | unsigned int , | |
1932 | Output_section* , | |
1933 | const elfcpp::Rela<size, big_endian>& , | |
1934 | unsigned int r_type, | |
1935 | const elfcpp::Sym<size, big_endian>&); | |
053a4d68 JY |
1936 | |
1937 | inline bool | |
1938 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
1939 | Target_aarch64<size, big_endian>* , |
1940 | Sized_relobj_file<size, big_endian>* , | |
1941 | unsigned int , | |
1942 | Output_section* , | |
1943 | const elfcpp::Rela<size, big_endian>& , | |
1944 | unsigned int r_type, | |
1945 | Symbol* gsym); | |
053a4d68 JY |
1946 | |
1947 | private: | |
1948 | static void | |
1949 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, | |
1950 | unsigned int r_type); | |
1951 | ||
1952 | static void | |
1953 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, | |
1954 | unsigned int r_type, Symbol*); | |
1955 | ||
1956 | inline bool | |
1957 | possible_function_pointer_reloc(unsigned int r_type); | |
1958 | ||
1959 | void | |
1960 | check_non_pic(Relobj*, unsigned int r_type); | |
1961 | ||
1962 | // Whether we have issued an error about a non-PIC compilation. | |
1963 | bool issued_non_pic_error_; | |
1964 | }; | |
1965 | ||
1966 | // The class which implements relocation. | |
1967 | class Relocate | |
1968 | { | |
1969 | public: | |
1970 | Relocate() | |
3a531937 | 1971 | : skip_call_tls_get_addr_(false) |
053a4d68 JY |
1972 | { } |
1973 | ||
1974 | ~Relocate() | |
1975 | { } | |
1976 | ||
1977 | // Do a relocation. Return false if the caller should not issue | |
1978 | // any warnings about this relocation. | |
1979 | inline bool | |
1980 | relocate(const Relocate_info<size, big_endian>*, Target_aarch64*, | |
1981 | Output_section*, | |
1982 | size_t relnum, const elfcpp::Rela<size, big_endian>&, | |
1983 | unsigned int r_type, const Sized_symbol<size>*, | |
1984 | const Symbol_value<size>*, | |
1985 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
1986 | section_size_type); | |
1987 | ||
8e33481e | 1988 | private: |
83a01957 HS |
1989 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
1990 | relocate_tls(const Relocate_info<size, big_endian>*, | |
8e33481e HS |
1991 | Target_aarch64<size, big_endian>*, |
1992 | size_t, | |
1993 | const elfcpp::Rela<size, big_endian>&, | |
1994 | unsigned int r_type, const Sized_symbol<size>*, | |
1995 | const Symbol_value<size>*, | |
1996 | unsigned char*, | |
1997 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
1998 | ||
83a01957 | 1999 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 2000 | tls_gd_to_le( |
83a01957 | 2001 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
2002 | Target_aarch64<size, big_endian>*, |
2003 | const elfcpp::Rela<size, big_endian>&, | |
2004 | unsigned int, | |
2005 | unsigned char*, | |
2006 | const Symbol_value<size>*); | |
2007 | ||
83a01957 | 2008 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 2009 | tls_ie_to_le( |
83a01957 | 2010 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
2011 | Target_aarch64<size, big_endian>*, |
2012 | const elfcpp::Rela<size, big_endian>&, | |
2013 | unsigned int, | |
2014 | unsigned char*, | |
2015 | const Symbol_value<size>*); | |
2016 | ||
83a01957 | 2017 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 2018 | tls_desc_gd_to_le( |
83a01957 | 2019 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
2020 | Target_aarch64<size, big_endian>*, |
2021 | const elfcpp::Rela<size, big_endian>&, | |
2022 | unsigned int, | |
2023 | unsigned char*, | |
2024 | const Symbol_value<size>*); | |
2025 | ||
83a01957 | 2026 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 2027 | tls_desc_gd_to_ie( |
83a01957 | 2028 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
2029 | Target_aarch64<size, big_endian>*, |
2030 | const elfcpp::Rela<size, big_endian>&, | |
2031 | unsigned int, | |
2032 | unsigned char*, | |
2033 | const Symbol_value<size>*, | |
2034 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
2035 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
2036 | ||
2037 | bool skip_call_tls_get_addr_; | |
2038 | ||
8e33481e | 2039 | }; // End of class Relocate |
053a4d68 JY |
2040 | |
2041 | // A class which returns the size required for a relocation type, | |
2042 | // used while scanning relocs during a relocatable link. | |
2043 | class Relocatable_size_for_reloc | |
2044 | { | |
2045 | public: | |
2046 | unsigned int | |
2047 | get_size_for_reloc(unsigned int, Relobj*); | |
2048 | }; | |
2049 | ||
2050 | // Adjust TLS relocation type based on the options and whether this | |
2051 | // is a local symbol. | |
2052 | static tls::Tls_optimization | |
2053 | optimize_tls_reloc(bool is_final, int r_type); | |
2054 | ||
2055 | // Get the GOT section, creating it if necessary. | |
2056 | Output_data_got_aarch64<size, big_endian>* | |
2057 | got_section(Symbol_table*, Layout*); | |
2058 | ||
2059 | // Get the GOT PLT section. | |
2060 | Output_data_space* | |
2061 | got_plt_section() const | |
2062 | { | |
2063 | gold_assert(this->got_plt_ != NULL); | |
2064 | return this->got_plt_; | |
2065 | } | |
2066 | ||
3a531937 JY |
2067 | // Get the GOT section for TLSDESC entries. |
2068 | Output_data_got<size, big_endian>* | |
2069 | got_tlsdesc_section() const | |
2070 | { | |
2071 | gold_assert(this->got_tlsdesc_ != NULL); | |
2072 | return this->got_tlsdesc_; | |
2073 | } | |
2074 | ||
053a4d68 JY |
2075 | // Create the PLT section. |
2076 | void | |
2077 | make_plt_section(Symbol_table* symtab, Layout* layout); | |
2078 | ||
2079 | // Create a PLT entry for a global symbol. | |
2080 | void | |
2081 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
2082 | ||
3a531937 JY |
2083 | // Create a PLT entry for a local STT_GNU_IFUNC symbol. |
2084 | void | |
2085 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, | |
2086 | Sized_relobj_file<size, big_endian>* relobj, | |
2087 | unsigned int local_sym_index); | |
2088 | ||
2089 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. | |
2090 | void | |
2091 | define_tls_base_symbol(Symbol_table*, Layout*); | |
2092 | ||
2093 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. | |
2094 | void | |
2095 | reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout); | |
2096 | ||
2097 | // Create a GOT entry for the TLS module index. | |
2098 | unsigned int | |
2099 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
2100 | Sized_relobj_file<size, big_endian>* object); | |
2101 | ||
053a4d68 JY |
2102 | // Get the PLT section. |
2103 | Output_data_plt_aarch64<size, big_endian>* | |
2104 | plt_section() const | |
2105 | { | |
2106 | gold_assert(this->plt_ != NULL); | |
2107 | return this->plt_; | |
2108 | } | |
2109 | ||
2110 | // Get the dynamic reloc section, creating it if necessary. | |
2111 | Reloc_section* | |
2112 | rela_dyn_section(Layout*); | |
2113 | ||
3a531937 JY |
2114 | // Get the section to use for TLSDESC relocations. |
2115 | Reloc_section* | |
2116 | rela_tlsdesc_section(Layout*) const; | |
2117 | ||
2118 | // Get the section to use for IRELATIVE relocations. | |
2119 | Reloc_section* | |
2120 | rela_irelative_section(Layout*); | |
2121 | ||
053a4d68 JY |
2122 | // Add a potential copy relocation. |
2123 | void | |
2124 | copy_reloc(Symbol_table* symtab, Layout* layout, | |
2125 | Sized_relobj_file<size, big_endian>* object, | |
2126 | unsigned int shndx, Output_section* output_section, | |
2127 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
2128 | { | |
2129 | this->copy_relocs_.copy_reloc(symtab, layout, | |
2130 | symtab->get_sized_symbol<size>(sym), | |
2131 | object, shndx, output_section, | |
2132 | reloc, this->rela_dyn_section(layout)); | |
2133 | } | |
2134 | ||
2135 | // Information about this specific target which we pass to the | |
2136 | // general Target structure. | |
2137 | static const Target::Target_info aarch64_info; | |
2138 | ||
2139 | // The types of GOT entries needed for this platform. | |
2140 | // These values are exposed to the ABI in an incremental link. | |
2141 | // Do not renumber existing values without changing the version | |
2142 | // number of the .gnu_incremental_inputs section. | |
2143 | enum Got_type | |
2144 | { | |
2145 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
2146 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
2147 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
2148 | GOT_TYPE_TLS_DESC = 3 // GOT entry for TLS_DESC pair | |
2149 | }; | |
2150 | ||
3a531937 JY |
2151 | // This type is used as the argument to the target specific |
2152 | // relocation routines. The only target specific reloc is | |
2153 | // R_AARCh64_TLSDESC against a local symbol. | |
2154 | struct Tlsdesc_info | |
2155 | { | |
2156 | Tlsdesc_info(Sized_relobj_file<size, big_endian>* a_object, | |
2157 | unsigned int a_r_sym) | |
2158 | : object(a_object), r_sym(a_r_sym) | |
2159 | { } | |
2160 | ||
2161 | // The object in which the local symbol is defined. | |
2162 | Sized_relobj_file<size, big_endian>* object; | |
2163 | // The local symbol index in the object. | |
2164 | unsigned int r_sym; | |
2165 | }; | |
2166 | ||
053a4d68 JY |
2167 | // The GOT section. |
2168 | Output_data_got_aarch64<size, big_endian>* got_; | |
2169 | // The PLT section. | |
2170 | Output_data_plt_aarch64<size, big_endian>* plt_; | |
2171 | // The GOT PLT section. | |
2172 | Output_data_space* got_plt_; | |
3a531937 JY |
2173 | // The GOT section for IRELATIVE relocations. |
2174 | Output_data_space* got_irelative_; | |
2175 | // The GOT section for TLSDESC relocations. | |
2176 | Output_data_got<size, big_endian>* got_tlsdesc_; | |
053a4d68 JY |
2177 | // The _GLOBAL_OFFSET_TABLE_ symbol. |
2178 | Symbol* global_offset_table_; | |
2179 | // The dynamic reloc section. | |
2180 | Reloc_section* rela_dyn_; | |
3a531937 JY |
2181 | // The section to use for IRELATIVE relocs. |
2182 | Reloc_section* rela_irelative_; | |
053a4d68 JY |
2183 | // Relocs saved to avoid a COPY reloc. |
2184 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
3a531937 JY |
2185 | // Offset of the GOT entry for the TLS module index. |
2186 | unsigned int got_mod_index_offset_; | |
2187 | // We handle R_AARCH64_TLSDESC against a local symbol as a target | |
2188 | // specific relocation. Here we store the object and local symbol | |
2189 | // index for the relocation. | |
2190 | std::vector<Tlsdesc_info> tlsdesc_reloc_info_; | |
2191 | // True if the _TLS_MODULE_BASE_ symbol has been defined. | |
2192 | bool tls_base_symbol_defined_; | |
83a01957 HS |
2193 | // List of stub_tables |
2194 | Stub_table_list stub_tables_; | |
2195 | AArch64_input_section_map aarch64_input_section_map_; | |
8e33481e | 2196 | }; // End of Target_aarch64 |
053a4d68 | 2197 | |
3a531937 | 2198 | |
053a4d68 JY |
2199 | template<> |
2200 | const Target::Target_info Target_aarch64<64, false>::aarch64_info = | |
2201 | { | |
2202 | 64, // size | |
2203 | false, // is_big_endian | |
2204 | elfcpp::EM_AARCH64, // machine_code | |
2205 | false, // has_make_symbol | |
2206 | false, // has_resolve | |
2207 | false, // has_code_fill | |
2208 | true, // is_default_stack_executable | |
2209 | false, // can_icf_inline_merge_sections | |
2210 | '\0', // wrap_char | |
2211 | "/lib/ld.so.1", // program interpreter | |
2212 | 0x400000, // default_text_segment_address | |
2213 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
2214 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
2215 | false, // isolate_execinstr | |
2216 | 0, // rosegment_gap | |
2217 | elfcpp::SHN_UNDEF, // small_common_shndx | |
2218 | elfcpp::SHN_UNDEF, // large_common_shndx | |
2219 | 0, // small_common_section_flags | |
2220 | 0, // large_common_section_flags | |
2221 | NULL, // attributes_section | |
2222 | NULL, // attributes_vendor | |
2223 | "_start" // entry_symbol_name | |
2224 | }; | |
2225 | ||
2226 | template<> | |
2227 | const Target::Target_info Target_aarch64<32, false>::aarch64_info = | |
2228 | { | |
2229 | 32, // size | |
2230 | false, // is_big_endian | |
2231 | elfcpp::EM_AARCH64, // machine_code | |
2232 | false, // has_make_symbol | |
2233 | false, // has_resolve | |
2234 | false, // has_code_fill | |
2235 | true, // is_default_stack_executable | |
2236 | false, // can_icf_inline_merge_sections | |
2237 | '\0', // wrap_char | |
2238 | "/lib/ld.so.1", // program interpreter | |
2239 | 0x400000, // default_text_segment_address | |
2240 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
2241 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
2242 | false, // isolate_execinstr | |
2243 | 0, // rosegment_gap | |
2244 | elfcpp::SHN_UNDEF, // small_common_shndx | |
2245 | elfcpp::SHN_UNDEF, // large_common_shndx | |
2246 | 0, // small_common_section_flags | |
2247 | 0, // large_common_section_flags | |
2248 | NULL, // attributes_section | |
2249 | NULL, // attributes_vendor | |
2250 | "_start" // entry_symbol_name | |
2251 | }; | |
2252 | ||
2253 | template<> | |
2254 | const Target::Target_info Target_aarch64<64, true>::aarch64_info = | |
2255 | { | |
2256 | 64, // size | |
2257 | true, // is_big_endian | |
2258 | elfcpp::EM_AARCH64, // machine_code | |
2259 | false, // has_make_symbol | |
2260 | false, // has_resolve | |
2261 | false, // has_code_fill | |
2262 | true, // is_default_stack_executable | |
2263 | false, // can_icf_inline_merge_sections | |
2264 | '\0', // wrap_char | |
2265 | "/lib/ld.so.1", // program interpreter | |
2266 | 0x400000, // default_text_segment_address | |
2267 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
2268 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
2269 | false, // isolate_execinstr | |
2270 | 0, // rosegment_gap | |
2271 | elfcpp::SHN_UNDEF, // small_common_shndx | |
2272 | elfcpp::SHN_UNDEF, // large_common_shndx | |
2273 | 0, // small_common_section_flags | |
2274 | 0, // large_common_section_flags | |
2275 | NULL, // attributes_section | |
2276 | NULL, // attributes_vendor | |
2277 | "_start" // entry_symbol_name | |
2278 | }; | |
2279 | ||
2280 | template<> | |
2281 | const Target::Target_info Target_aarch64<32, true>::aarch64_info = | |
2282 | { | |
2283 | 32, // size | |
2284 | true, // is_big_endian | |
2285 | elfcpp::EM_AARCH64, // machine_code | |
2286 | false, // has_make_symbol | |
2287 | false, // has_resolve | |
2288 | false, // has_code_fill | |
2289 | true, // is_default_stack_executable | |
2290 | false, // can_icf_inline_merge_sections | |
2291 | '\0', // wrap_char | |
2292 | "/lib/ld.so.1", // program interpreter | |
2293 | 0x400000, // default_text_segment_address | |
2294 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
2295 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
2296 | false, // isolate_execinstr | |
2297 | 0, // rosegment_gap | |
2298 | elfcpp::SHN_UNDEF, // small_common_shndx | |
2299 | elfcpp::SHN_UNDEF, // large_common_shndx | |
2300 | 0, // small_common_section_flags | |
2301 | 0, // large_common_section_flags | |
2302 | NULL, // attributes_section | |
2303 | NULL, // attributes_vendor | |
2304 | "_start" // entry_symbol_name | |
2305 | }; | |
2306 | ||
2307 | // Get the GOT section, creating it if necessary. | |
2308 | ||
2309 | template<int size, bool big_endian> | |
2310 | Output_data_got_aarch64<size, big_endian>* | |
2311 | Target_aarch64<size, big_endian>::got_section(Symbol_table* symtab, | |
9363c7c3 | 2312 | Layout* layout) |
053a4d68 JY |
2313 | { |
2314 | if (this->got_ == NULL) | |
2315 | { | |
2316 | gold_assert(symtab != NULL && layout != NULL); | |
2317 | ||
2318 | // When using -z now, we can treat .got.plt as a relro section. | |
2319 | // Without -z now, it is modified after program startup by lazy | |
2320 | // PLT relocations. | |
2321 | bool is_got_plt_relro = parameters->options().now(); | |
2322 | Output_section_order got_order = (is_got_plt_relro | |
2323 | ? ORDER_RELRO | |
2324 | : ORDER_RELRO_LAST); | |
2325 | Output_section_order got_plt_order = (is_got_plt_relro | |
2326 | ? ORDER_RELRO | |
2327 | : ORDER_NON_RELRO_FIRST); | |
2328 | ||
2329 | // Layout of .got and .got.plt sections. | |
2330 | // .got[0] &_DYNAMIC <-_GLOBAL_OFFSET_TABLE_ | |
2331 | // ... | |
2332 | // .gotplt[0] reserved for ld.so (&linkmap) <--DT_PLTGOT | |
2333 | // .gotplt[1] reserved for ld.so (resolver) | |
2334 | // .gotplt[2] reserved | |
2335 | ||
2336 | // Generate .got section. | |
2337 | this->got_ = new Output_data_got_aarch64<size, big_endian>(symtab, | |
9363c7c3 | 2338 | layout); |
053a4d68 | 2339 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
9363c7c3 JY |
2340 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), |
2341 | this->got_, got_order, true); | |
053a4d68 JY |
2342 | // The first word of GOT is reserved for the address of .dynamic. |
2343 | // We put 0 here now. The value will be replaced later in | |
2344 | // Output_data_got_aarch64::do_write. | |
2345 | this->got_->add_constant(0); | |
2346 | ||
2347 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT. | |
2348 | // _GLOBAL_OFFSET_TABLE_ value points to the start of the .got section, | |
2349 | // even if there is a .got.plt section. | |
2350 | this->global_offset_table_ = | |
9363c7c3 JY |
2351 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
2352 | Symbol_table::PREDEFINED, | |
2353 | this->got_, | |
2354 | 0, 0, elfcpp::STT_OBJECT, | |
2355 | elfcpp::STB_LOCAL, | |
2356 | elfcpp::STV_HIDDEN, 0, | |
2357 | false, false); | |
053a4d68 JY |
2358 | |
2359 | // Generate .got.plt section. | |
2360 | this->got_plt_ = new Output_data_space(size / 8, "** GOT PLT"); | |
2361 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
9363c7c3 JY |
2362 | (elfcpp::SHF_ALLOC |
2363 | | elfcpp::SHF_WRITE), | |
2364 | this->got_plt_, got_plt_order, | |
2365 | is_got_plt_relro); | |
053a4d68 JY |
2366 | |
2367 | // The first three entries are reserved. | |
9363c7c3 JY |
2368 | this->got_plt_->set_current_data_size( |
2369 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
053a4d68 | 2370 | |
3a531937 JY |
2371 | // If there are any IRELATIVE relocations, they get GOT entries |
2372 | // in .got.plt after the jump slot entries. | |
2373 | this->got_irelative_ = new Output_data_space(size / 8, | |
2374 | "** GOT IRELATIVE PLT"); | |
2375 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
2376 | (elfcpp::SHF_ALLOC | |
2377 | | elfcpp::SHF_WRITE), | |
2378 | this->got_irelative_, | |
2379 | got_plt_order, | |
2380 | is_got_plt_relro); | |
2381 | ||
2382 | // If there are any TLSDESC relocations, they get GOT entries in | |
2383 | // .got.plt after the jump slot and IRELATIVE entries. | |
2384 | this->got_tlsdesc_ = new Output_data_got<size, big_endian>(); | |
2385 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
2386 | (elfcpp::SHF_ALLOC | |
2387 | | elfcpp::SHF_WRITE), | |
2388 | this->got_tlsdesc_, | |
2389 | got_plt_order, | |
2390 | is_got_plt_relro); | |
2391 | ||
053a4d68 | 2392 | if (!is_got_plt_relro) |
9363c7c3 JY |
2393 | { |
2394 | // Those bytes can go into the relro segment. | |
2395 | layout->increase_relro( | |
2396 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
2397 | } | |
053a4d68 JY |
2398 | |
2399 | } | |
2400 | return this->got_; | |
2401 | } | |
2402 | ||
2403 | // Get the dynamic reloc section, creating it if necessary. | |
2404 | ||
2405 | template<int size, bool big_endian> | |
2406 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
2407 | Target_aarch64<size, big_endian>::rela_dyn_section(Layout* layout) | |
2408 | { | |
2409 | if (this->rela_dyn_ == NULL) | |
2410 | { | |
2411 | gold_assert(layout != NULL); | |
2412 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2413 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
2414 | elfcpp::SHF_ALLOC, this->rela_dyn_, | |
2415 | ORDER_DYNAMIC_RELOCS, false); | |
2416 | } | |
2417 | return this->rela_dyn_; | |
2418 | } | |
2419 | ||
3a531937 JY |
2420 | // Get the section to use for IRELATIVE relocs, creating it if |
2421 | // necessary. These go in .rela.dyn, but only after all other dynamic | |
2422 | // relocations. They need to follow the other dynamic relocations so | |
2423 | // that they can refer to global variables initialized by those | |
2424 | // relocs. | |
2425 | ||
2426 | template<int size, bool big_endian> | |
2427 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
2428 | Target_aarch64<size, big_endian>::rela_irelative_section(Layout* layout) | |
2429 | { | |
2430 | if (this->rela_irelative_ == NULL) | |
2431 | { | |
2432 | // Make sure we have already created the dynamic reloc section. | |
2433 | this->rela_dyn_section(layout); | |
2434 | this->rela_irelative_ = new Reloc_section(false); | |
2435 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
2436 | elfcpp::SHF_ALLOC, this->rela_irelative_, | |
2437 | ORDER_DYNAMIC_RELOCS, false); | |
2438 | gold_assert(this->rela_dyn_->output_section() | |
2439 | == this->rela_irelative_->output_section()); | |
2440 | } | |
2441 | return this->rela_irelative_; | |
2442 | } | |
2443 | ||
2444 | ||
83a01957 HS |
2445 | // do_make_elf_object to override the same function in the base class. We need |
2446 | // to use a target-specific sub-class of Sized_relobj_file<size, big_endian> to | |
2447 | // store backend specific information. Hence we need to have our own ELF object | |
2448 | // creation. | |
2449 | ||
2450 | template<int size, bool big_endian> | |
2451 | Object* | |
2452 | Target_aarch64<size, big_endian>::do_make_elf_object( | |
2453 | const std::string& name, | |
2454 | Input_file* input_file, | |
2455 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2456 | { | |
2457 | int et = ehdr.get_e_type(); | |
2458 | // ET_EXEC files are valid input for --just-symbols/-R, | |
2459 | // and we treat them as relocatable objects. | |
2460 | if (et == elfcpp::ET_EXEC && input_file->just_symbols()) | |
2461 | return Sized_target<size, big_endian>::do_make_elf_object( | |
2462 | name, input_file, offset, ehdr); | |
2463 | else if (et == elfcpp::ET_REL) | |
2464 | { | |
2465 | AArch64_relobj<size, big_endian>* obj = | |
2466 | new AArch64_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
2467 | obj->setup(); | |
2468 | return obj; | |
2469 | } | |
2470 | else if (et == elfcpp::ET_DYN) | |
2471 | { | |
2472 | // Keep base implementation. | |
2473 | Sized_dynobj<size, big_endian>* obj = | |
2474 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
2475 | obj->setup(); | |
2476 | return obj; | |
2477 | } | |
2478 | else | |
2479 | { | |
2480 | gold_error(_("%s: unsupported ELF file type %d"), | |
2481 | name.c_str(), et); | |
2482 | return NULL; | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | ||
2487 | // Scan a relocation for stub generation. | |
2488 | ||
2489 | template<int size, bool big_endian> | |
2490 | void | |
2491 | Target_aarch64<size, big_endian>::scan_reloc_for_stub( | |
2492 | const Relocate_info<size, big_endian>* relinfo, | |
2493 | unsigned int r_type, | |
2494 | const Sized_symbol<size>* gsym, | |
2495 | unsigned int r_sym, | |
2496 | const Symbol_value<size>* psymval, | |
2497 | typename elfcpp::Elf_types<size>::Elf_Swxword addend, | |
2498 | Address address) | |
2499 | { | |
2500 | const AArch64_relobj<size, big_endian>* aarch64_relobj = | |
2501 | static_cast<AArch64_relobj<size, big_endian>*>(relinfo->object); | |
2502 | ||
2503 | Symbol_value<size> symval; | |
2504 | if (gsym != NULL) | |
2505 | { | |
2506 | const AArch64_reloc_property* arp = aarch64_reloc_property_table-> | |
2507 | get_reloc_property(r_type); | |
2508 | if (gsym->use_plt_offset(arp->reference_flags())) | |
2509 | { | |
2510 | // This uses a PLT, change the symbol value. | |
2511 | symval.set_output_value(this->plt_section()->address() | |
2512 | + gsym->plt_offset()); | |
2513 | psymval = &symval; | |
2514 | } | |
2515 | else if (gsym->is_undefined()) | |
2516 | // There is no need to generate a stub symbol is undefined. | |
2517 | return; | |
2518 | } | |
2519 | ||
2520 | // Get the symbol value. | |
2521 | typename Symbol_value<size>::Value value = psymval->value(aarch64_relobj, 0); | |
2522 | ||
2523 | // Owing to pipelining, the PC relative branches below actually skip | |
2524 | // two instructions when the branch offset is 0. | |
2525 | Address destination = static_cast<Address>(-1); | |
2526 | switch (r_type) | |
2527 | { | |
2528 | case elfcpp::R_AARCH64_CALL26: | |
2529 | case elfcpp::R_AARCH64_JUMP26: | |
2530 | destination = value + addend; | |
2531 | break; | |
2532 | default: | |
2533 | gold_assert(false); | |
2534 | } | |
2535 | ||
2536 | typename The_reloc_stub::Stub_type stub_type = The_reloc_stub:: | |
2537 | stub_type_for_reloc(r_type, address, destination); | |
2538 | if (stub_type == The_reloc_stub::ST_NONE) | |
2539 | return ; | |
2540 | ||
2541 | The_stub_table* stub_table = aarch64_relobj->stub_table(relinfo->data_shndx); | |
2542 | gold_assert(stub_table != NULL); | |
2543 | ||
2544 | The_reloc_stub_key key(stub_type, gsym, aarch64_relobj, r_sym, addend); | |
2545 | The_reloc_stub* stub = stub_table->find_reloc_stub(key); | |
2546 | if (stub == NULL) | |
2547 | { | |
2548 | stub = new The_reloc_stub(stub_type); | |
2549 | stub_table->add_reloc_stub(stub, key); | |
2550 | } | |
2551 | stub->set_destination_address(destination); | |
2552 | } // End of Target_aarch64::scan_reloc_for_stub | |
2553 | ||
2554 | ||
2555 | // This function scans a relocation section for stub generation. | |
2556 | // The template parameter Relocate must be a class type which provides | |
2557 | // a single function, relocate(), which implements the machine | |
2558 | // specific part of a relocation. | |
2559 | ||
2560 | // BIG_ENDIAN is the endianness of the data. SH_TYPE is the section type: | |
2561 | // SHT_REL or SHT_RELA. | |
2562 | ||
2563 | // PRELOCS points to the relocation data. RELOC_COUNT is the number | |
2564 | // of relocs. OUTPUT_SECTION is the output section. | |
2565 | // NEEDS_SPECIAL_OFFSET_HANDLING is true if input offsets need to be | |
2566 | // mapped to output offsets. | |
2567 | ||
2568 | // VIEW is the section data, VIEW_ADDRESS is its memory address, and | |
2569 | // VIEW_SIZE is the size. These refer to the input section, unless | |
2570 | // NEEDS_SPECIAL_OFFSET_HANDLING is true, in which case they refer to | |
2571 | // the output section. | |
2572 | ||
2573 | template<int size, bool big_endian> | |
2574 | template<int sh_type> | |
2575 | void inline | |
2576 | Target_aarch64<size, big_endian>::scan_reloc_section_for_stubs( | |
2577 | const Relocate_info<size, big_endian>* relinfo, | |
2578 | const unsigned char* prelocs, | |
2579 | size_t reloc_count, | |
2580 | Output_section* /*output_section*/, | |
2581 | bool /*needs_special_offset_handling*/, | |
2582 | const unsigned char* /*view*/, | |
2583 | Address view_address, | |
2584 | section_size_type) | |
2585 | { | |
2586 | typedef typename Reloc_types<sh_type,size,big_endian>::Reloc Reltype; | |
2587 | ||
2588 | const int reloc_size = | |
2589 | Reloc_types<sh_type,size,big_endian>::reloc_size; | |
2590 | AArch64_relobj<size, big_endian>* object = | |
2591 | static_cast<AArch64_relobj<size, big_endian>*>(relinfo->object); | |
2592 | unsigned int local_count = object->local_symbol_count(); | |
2593 | ||
2594 | gold::Default_comdat_behavior default_comdat_behavior; | |
2595 | Comdat_behavior comdat_behavior = CB_UNDETERMINED; | |
2596 | ||
2597 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
2598 | { | |
2599 | Reltype reloc(prelocs); | |
2600 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); | |
2601 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2602 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2603 | if (r_type != elfcpp::R_AARCH64_CALL26 | |
2604 | && r_type != elfcpp::R_AARCH64_JUMP26) | |
2605 | continue; | |
2606 | ||
2607 | section_offset_type offset = | |
2608 | convert_to_section_size_type(reloc.get_r_offset()); | |
2609 | ||
2610 | // Get the addend. | |
2611 | typename elfcpp::Elf_types<size>::Elf_Swxword addend = | |
2612 | reloc.get_r_addend(); | |
2613 | ||
2614 | const Sized_symbol<size>* sym; | |
2615 | Symbol_value<size> symval; | |
2616 | const Symbol_value<size> *psymval; | |
2617 | bool is_defined_in_discarded_section; | |
2618 | unsigned int shndx; | |
2619 | if (r_sym < local_count) | |
2620 | { | |
2621 | sym = NULL; | |
2622 | psymval = object->local_symbol(r_sym); | |
2623 | ||
2624 | // If the local symbol belongs to a section we are discarding, | |
2625 | // and that section is a debug section, try to find the | |
2626 | // corresponding kept section and map this symbol to its | |
2627 | // counterpart in the kept section. The symbol must not | |
2628 | // correspond to a section we are folding. | |
2629 | bool is_ordinary; | |
2630 | shndx = psymval->input_shndx(&is_ordinary); | |
2631 | is_defined_in_discarded_section = | |
2632 | (is_ordinary | |
2633 | && shndx != elfcpp::SHN_UNDEF | |
2634 | && !object->is_section_included(shndx) | |
2635 | && !relinfo->symtab->is_section_folded(object, shndx)); | |
2636 | ||
2637 | // We need to compute the would-be final value of this local | |
2638 | // symbol. | |
2639 | if (!is_defined_in_discarded_section) | |
2640 | { | |
2641 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
2642 | typename ObjType::Compute_final_local_value_status status = | |
2643 | object->compute_final_local_value(r_sym, psymval, &symval, | |
2644 | relinfo->symtab); | |
2645 | if (status == ObjType::CFLV_OK) | |
2646 | { | |
2647 | // Currently we cannot handle a branch to a target in | |
2648 | // a merged section. If this is the case, issue an error | |
2649 | // and also free the merge symbol value. | |
2650 | if (!symval.has_output_value()) | |
2651 | { | |
2652 | const std::string& section_name = | |
2653 | object->section_name(shndx); | |
2654 | object->error(_("cannot handle branch to local %u " | |
2655 | "in a merged section %s"), | |
2656 | r_sym, section_name.c_str()); | |
2657 | } | |
2658 | psymval = &symval; | |
2659 | } | |
2660 | else | |
2661 | { | |
2662 | // We cannot determine the final value. | |
2663 | continue; | |
2664 | } | |
2665 | } | |
2666 | } | |
2667 | else | |
2668 | { | |
2669 | const Symbol* gsym; | |
2670 | gsym = object->global_symbol(r_sym); | |
2671 | gold_assert(gsym != NULL); | |
2672 | if (gsym->is_forwarder()) | |
2673 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
2674 | ||
2675 | sym = static_cast<const Sized_symbol<size>*>(gsym); | |
2676 | if (sym->has_symtab_index() && sym->symtab_index() != -1U) | |
2677 | symval.set_output_symtab_index(sym->symtab_index()); | |
2678 | else | |
2679 | symval.set_no_output_symtab_entry(); | |
2680 | ||
2681 | // We need to compute the would-be final value of this global | |
2682 | // symbol. | |
2683 | const Symbol_table* symtab = relinfo->symtab; | |
2684 | const Sized_symbol<size>* sized_symbol = | |
2685 | symtab->get_sized_symbol<size>(gsym); | |
2686 | Symbol_table::Compute_final_value_status status; | |
2687 | typename elfcpp::Elf_types<size>::Elf_Addr value = | |
2688 | symtab->compute_final_value<size>(sized_symbol, &status); | |
2689 | ||
2690 | // Skip this if the symbol has not output section. | |
2691 | if (status == Symbol_table::CFVS_NO_OUTPUT_SECTION) | |
2692 | continue; | |
2693 | symval.set_output_value(value); | |
2694 | ||
2695 | if (gsym->type() == elfcpp::STT_TLS) | |
2696 | symval.set_is_tls_symbol(); | |
2697 | else if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
2698 | symval.set_is_ifunc_symbol(); | |
2699 | psymval = &symval; | |
2700 | ||
2701 | is_defined_in_discarded_section = | |
2702 | (gsym->is_defined_in_discarded_section() | |
2703 | && gsym->is_undefined()); | |
2704 | shndx = 0; | |
2705 | } | |
2706 | ||
2707 | Symbol_value<size> symval2; | |
2708 | if (is_defined_in_discarded_section) | |
2709 | { | |
2710 | if (comdat_behavior == CB_UNDETERMINED) | |
2711 | { | |
2712 | std::string name = object->section_name(relinfo->data_shndx); | |
2713 | comdat_behavior = default_comdat_behavior.get(name.c_str()); | |
2714 | } | |
2715 | if (comdat_behavior == CB_PRETEND) | |
2716 | { | |
2717 | bool found; | |
2718 | typename elfcpp::Elf_types<size>::Elf_Addr value = | |
2719 | object->map_to_kept_section(shndx, &found); | |
2720 | if (found) | |
2721 | symval2.set_output_value(value + psymval->input_value()); | |
2722 | else | |
2723 | symval2.set_output_value(0); | |
2724 | } | |
2725 | else | |
2726 | { | |
2727 | if (comdat_behavior == CB_WARNING) | |
2728 | gold_warning_at_location(relinfo, i, offset, | |
2729 | _("relocation refers to discarded " | |
2730 | "section")); | |
2731 | symval2.set_output_value(0); | |
2732 | } | |
2733 | symval2.set_no_output_symtab_entry(); | |
2734 | psymval = &symval2; | |
2735 | } | |
2736 | ||
2737 | // If symbol is a section symbol, we don't know the actual type of | |
2738 | // destination. Give up. | |
2739 | if (psymval->is_section_symbol()) | |
2740 | continue; | |
2741 | ||
2742 | this->scan_reloc_for_stub(relinfo, r_type, sym, r_sym, psymval, | |
2743 | addend, view_address + offset); | |
2744 | } // End of iterating relocs in a section | |
2745 | } // End of Target_aarch64::scan_reloc_section_for_stubs | |
2746 | ||
2747 | ||
2748 | // Scan an input section for stub generation. | |
2749 | ||
2750 | template<int size, bool big_endian> | |
2751 | void | |
2752 | Target_aarch64<size, big_endian>::scan_section_for_stubs( | |
2753 | const Relocate_info<size, big_endian>* relinfo, | |
2754 | unsigned int sh_type, | |
2755 | const unsigned char* prelocs, | |
2756 | size_t reloc_count, | |
2757 | Output_section* output_section, | |
2758 | bool needs_special_offset_handling, | |
2759 | const unsigned char* view, | |
2760 | Address view_address, | |
2761 | section_size_type view_size) | |
2762 | { | |
2763 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2764 | this->scan_reloc_section_for_stubs<elfcpp::SHT_RELA>( | |
2765 | relinfo, | |
2766 | prelocs, | |
2767 | reloc_count, | |
2768 | output_section, | |
2769 | needs_special_offset_handling, | |
2770 | view, | |
2771 | view_address, | |
2772 | view_size); | |
2773 | } | |
2774 | ||
2775 | ||
2776 | // Relocate a single stub. | |
2777 | ||
2778 | template<int size, bool big_endian> | |
2779 | void Target_aarch64<size, big_endian>:: | |
2780 | relocate_stub(The_reloc_stub* stub, | |
2781 | const The_relocate_info*, | |
2782 | Output_section*, | |
2783 | unsigned char* view, | |
2784 | Address address, | |
2785 | section_size_type) | |
2786 | { | |
2787 | typedef AArch64_relocate_functions<size, big_endian> The_reloc_functions; | |
2788 | typedef typename The_reloc_functions::Status The_reloc_functions_status; | |
2789 | typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype; | |
2790 | ||
2791 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
2792 | int insn_number = stub->stub_insn_number(); | |
2793 | const uint32_t* insns = stub->stub_insns(); | |
2794 | // Check the insns are really those stub insns. | |
2795 | for (int i = 0; i < insn_number; ++i) | |
2796 | { | |
2797 | Insntype insn = elfcpp::Swap<32,big_endian>::readval(ip + i); | |
2798 | gold_assert(((uint32_t)insn == insns[i+1])); | |
2799 | } | |
2800 | ||
2801 | Address dest = stub->destination_address(); | |
2802 | ||
2803 | switch(stub->stub_type()) | |
2804 | { | |
2805 | case The_reloc_stub::ST_ADRP_BRANCH: | |
2806 | { | |
2807 | // 1st reloc is ADR_PREL_PG_HI21 | |
2808 | The_reloc_functions_status status = | |
2809 | The_reloc_functions::adrp(view, dest, address); | |
2810 | // An error should never arise in the above step. If so, please | |
2811 | // check 'aarch64_valid_for_adrp_p'. | |
2812 | gold_assert(status == The_reloc_functions::STATUS_OKAY); | |
2813 | ||
2814 | // 2nd reloc is ADD_ABS_LO12_NC | |
2815 | const AArch64_reloc_property* arp = | |
2816 | aarch64_reloc_property_table->get_reloc_property( | |
2817 | elfcpp::R_AARCH64_ADD_ABS_LO12_NC); | |
2818 | gold_assert(arp != NULL); | |
2819 | status = The_reloc_functions::template | |
2820 | rela_general<32>(view + 4, dest, 0, arp); | |
2821 | // An error should never arise, it is an "_NC" relocation. | |
2822 | gold_assert(status == The_reloc_functions::STATUS_OKAY); | |
2823 | } | |
2824 | break; | |
2825 | ||
2826 | case The_reloc_stub::ST_LONG_BRANCH_ABS: | |
2827 | // 1st reloc is R_AARCH64_PREL64, at offset 8 | |
2828 | elfcpp::Swap<64,big_endian>::writeval(view + 8, dest); | |
2829 | break; | |
2830 | ||
2831 | case The_reloc_stub::ST_LONG_BRANCH_PCREL: | |
2832 | { | |
2833 | // "PC" calculation is the 2nd insn in the stub. | |
2834 | uint64_t offset = dest - (address + 4); | |
2835 | // Offset is placed at offset 4 and 5. | |
2836 | elfcpp::Swap<64,big_endian>::writeval(view + 16, offset); | |
2837 | } | |
2838 | break; | |
2839 | ||
2840 | default: | |
2841 | gold_assert(false); | |
2842 | } | |
2843 | } | |
2844 | ||
2845 | ||
053a4d68 JY |
2846 | // A class to handle the PLT data. |
2847 | // This is an abstract base class that handles most of the linker details | |
2848 | // but does not know the actual contents of PLT entries. The derived | |
2849 | // classes below fill in those details. | |
2850 | ||
2851 | template<int size, bool big_endian> | |
2852 | class Output_data_plt_aarch64 : public Output_section_data | |
2853 | { | |
2854 | public: | |
2855 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> | |
2856 | Reloc_section; | |
2857 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
2858 | ||
2859 | Output_data_plt_aarch64(Layout* layout, | |
9363c7c3 | 2860 | uint64_t addralign, |
3a531937 JY |
2861 | Output_data_got_aarch64<size, big_endian>* got, |
2862 | Output_data_space* got_plt, | |
2863 | Output_data_space* got_irelative) | |
2864 | : Output_section_data(addralign), tlsdesc_rel_(NULL), | |
2865 | got_(got), got_plt_(got_plt), got_irelative_(got_irelative), | |
2866 | count_(0), irelative_count_(0), tlsdesc_got_offset_(-1U) | |
053a4d68 JY |
2867 | { this->init(layout); } |
2868 | ||
2869 | // Initialize the PLT section. | |
2870 | void | |
2871 | init(Layout* layout); | |
2872 | ||
2873 | // Add an entry to the PLT. | |
2874 | void | |
2875 | add_entry(Symbol* gsym); | |
2876 | ||
3a531937 JY |
2877 | // Add the reserved TLSDESC_PLT entry to the PLT. |
2878 | void | |
2879 | reserve_tlsdesc_entry(unsigned int got_offset) | |
2880 | { this->tlsdesc_got_offset_ = got_offset; } | |
2881 | ||
2882 | // Return true if a TLSDESC_PLT entry has been reserved. | |
2883 | bool | |
2884 | has_tlsdesc_entry() const | |
2885 | { return this->tlsdesc_got_offset_ != -1U; } | |
2886 | ||
2887 | // Return the GOT offset for the reserved TLSDESC_PLT entry. | |
2888 | unsigned int | |
2889 | get_tlsdesc_got_offset() const | |
2890 | { return this->tlsdesc_got_offset_; } | |
2891 | ||
2892 | // Return the PLT offset of the reserved TLSDESC_PLT entry. | |
2893 | unsigned int | |
2894 | get_tlsdesc_plt_offset() const | |
2895 | { | |
2896 | return (this->first_plt_entry_offset() + | |
2897 | (this->count_ + this->irelative_count_) | |
2898 | * this->get_plt_entry_size()); | |
2899 | } | |
2900 | ||
053a4d68 JY |
2901 | // Return the .rela.plt section data. |
2902 | Reloc_section* | |
2903 | rela_plt() | |
2904 | { return this->rel_; } | |
2905 | ||
3a531937 JY |
2906 | // Return where the TLSDESC relocations should go. |
2907 | Reloc_section* | |
2908 | rela_tlsdesc(Layout*); | |
2909 | ||
2910 | // Return where the IRELATIVE relocations should go in the PLT | |
2911 | // relocations. | |
2912 | Reloc_section* | |
2913 | rela_irelative(Symbol_table*, Layout*); | |
2914 | ||
9363c7c3 JY |
2915 | // Return whether we created a section for IRELATIVE relocations. |
2916 | bool | |
2917 | has_irelative_section() const | |
2918 | { return this->irelative_rel_ != NULL; } | |
2919 | ||
053a4d68 JY |
2920 | // Return the number of PLT entries. |
2921 | unsigned int | |
2922 | entry_count() const | |
3a531937 | 2923 | { return this->count_ + this->irelative_count_; } |
053a4d68 JY |
2924 | |
2925 | // Return the offset of the first non-reserved PLT entry. | |
2926 | unsigned int | |
3a531937 | 2927 | first_plt_entry_offset() const |
053a4d68 JY |
2928 | { return this->do_first_plt_entry_offset(); } |
2929 | ||
2930 | // Return the size of a PLT entry. | |
2931 | unsigned int | |
2932 | get_plt_entry_size() const | |
2933 | { return this->do_get_plt_entry_size(); } | |
2934 | ||
3a531937 JY |
2935 | // Return the reserved tlsdesc entry size. |
2936 | unsigned int | |
2937 | get_plt_tlsdesc_entry_size() const | |
2938 | { return this->do_get_plt_tlsdesc_entry_size(); } | |
2939 | ||
9363c7c3 JY |
2940 | // Return the PLT address to use for a global symbol. |
2941 | uint64_t | |
2942 | address_for_global(const Symbol*); | |
2943 | ||
2944 | // Return the PLT address to use for a local symbol. | |
2945 | uint64_t | |
2946 | address_for_local(const Relobj*, unsigned int symndx); | |
2947 | ||
053a4d68 JY |
2948 | protected: |
2949 | // Fill in the first PLT entry. | |
2950 | void | |
2951 | fill_first_plt_entry(unsigned char* pov, | |
2952 | Address got_address, | |
2953 | Address plt_address) | |
2954 | { this->do_fill_first_plt_entry(pov, got_address, plt_address); } | |
2955 | ||
2956 | // Fill in a normal PLT entry. | |
2957 | void | |
2958 | fill_plt_entry(unsigned char* pov, | |
2959 | Address got_address, | |
2960 | Address plt_address, | |
2961 | unsigned int got_offset, | |
2962 | unsigned int plt_offset) | |
2963 | { | |
2964 | this->do_fill_plt_entry(pov, got_address, plt_address, | |
2965 | got_offset, plt_offset); | |
2966 | } | |
2967 | ||
3a531937 JY |
2968 | // Fill in the reserved TLSDESC PLT entry. |
2969 | void | |
2970 | fill_tlsdesc_entry(unsigned char* pov, | |
2971 | Address gotplt_address, | |
2972 | Address plt_address, | |
2973 | Address got_base, | |
2974 | unsigned int tlsdesc_got_offset, | |
2975 | unsigned int plt_offset) | |
2976 | { | |
2977 | this->do_fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
2978 | tlsdesc_got_offset, plt_offset); | |
2979 | } | |
2980 | ||
053a4d68 JY |
2981 | virtual unsigned int |
2982 | do_first_plt_entry_offset() const = 0; | |
2983 | ||
2984 | virtual unsigned int | |
2985 | do_get_plt_entry_size() const = 0; | |
2986 | ||
3a531937 JY |
2987 | virtual unsigned int |
2988 | do_get_plt_tlsdesc_entry_size() const = 0; | |
2989 | ||
053a4d68 JY |
2990 | virtual void |
2991 | do_fill_first_plt_entry(unsigned char* pov, | |
2992 | Address got_addr, | |
2993 | Address plt_addr) = 0; | |
2994 | ||
2995 | virtual void | |
2996 | do_fill_plt_entry(unsigned char* pov, | |
2997 | Address got_address, | |
2998 | Address plt_address, | |
2999 | unsigned int got_offset, | |
3000 | unsigned int plt_offset) = 0; | |
3001 | ||
3a531937 JY |
3002 | virtual void |
3003 | do_fill_tlsdesc_entry(unsigned char* pov, | |
3004 | Address gotplt_address, | |
3005 | Address plt_address, | |
3006 | Address got_base, | |
3007 | unsigned int tlsdesc_got_offset, | |
3008 | unsigned int plt_offset) = 0; | |
3009 | ||
053a4d68 JY |
3010 | void |
3011 | do_adjust_output_section(Output_section* os); | |
3012 | ||
3013 | // Write to a map file. | |
3014 | void | |
3015 | do_print_to_mapfile(Mapfile* mapfile) const | |
3016 | { mapfile->print_output_data(this, _("** PLT")); } | |
3017 | ||
3018 | private: | |
3019 | // Set the final size. | |
3020 | void | |
3021 | set_final_data_size(); | |
3022 | ||
3023 | // Write out the PLT data. | |
3024 | void | |
3025 | do_write(Output_file*); | |
3026 | ||
3027 | // The reloc section. | |
3028 | Reloc_section* rel_; | |
3a531937 JY |
3029 | |
3030 | // The TLSDESC relocs, if necessary. These must follow the regular | |
3031 | // PLT relocs. | |
3032 | Reloc_section* tlsdesc_rel_; | |
3033 | ||
9363c7c3 JY |
3034 | // The IRELATIVE relocs, if necessary. These must follow the |
3035 | // regular PLT relocations. | |
3036 | Reloc_section* irelative_rel_; | |
3a531937 | 3037 | |
053a4d68 JY |
3038 | // The .got section. |
3039 | Output_data_got_aarch64<size, big_endian>* got_; | |
3a531937 | 3040 | |
053a4d68 JY |
3041 | // The .got.plt section. |
3042 | Output_data_space* got_plt_; | |
3a531937 JY |
3043 | |
3044 | // The part of the .got.plt section used for IRELATIVE relocs. | |
3045 | Output_data_space* got_irelative_; | |
3046 | ||
053a4d68 JY |
3047 | // The number of PLT entries. |
3048 | unsigned int count_; | |
3a531937 JY |
3049 | |
3050 | // Number of PLT entries with R_X86_64_IRELATIVE relocs. These | |
3051 | // follow the regular PLT entries. | |
3052 | unsigned int irelative_count_; | |
3053 | ||
3054 | // GOT offset of the reserved TLSDESC_GOT entry for the lazy trampoline. | |
3055 | // Communicated to the loader via DT_TLSDESC_GOT. The magic value -1 | |
3056 | // indicates an offset is not allocated. | |
3057 | unsigned int tlsdesc_got_offset_; | |
053a4d68 JY |
3058 | }; |
3059 | ||
3060 | // Initialize the PLT section. | |
3061 | ||
3062 | template<int size, bool big_endian> | |
3063 | void | |
3064 | Output_data_plt_aarch64<size, big_endian>::init(Layout* layout) | |
3065 | { | |
3066 | this->rel_ = new Reloc_section(false); | |
3067 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3068 | elfcpp::SHF_ALLOC, this->rel_, | |
3069 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3070 | } | |
3071 | ||
3072 | template<int size, bool big_endian> | |
3073 | void | |
3074 | Output_data_plt_aarch64<size, big_endian>::do_adjust_output_section( | |
3075 | Output_section* os) | |
3076 | { | |
3077 | os->set_entsize(this->get_plt_entry_size()); | |
3078 | } | |
3079 | ||
3080 | // Add an entry to the PLT. | |
3081 | ||
3082 | template<int size, bool big_endian> | |
3083 | void | |
3084 | Output_data_plt_aarch64<size, big_endian>::add_entry(Symbol* gsym) | |
3085 | { | |
3086 | gold_assert(!gsym->has_plt_offset()); | |
9363c7c3 JY |
3087 | |
3088 | gsym->set_plt_offset((this->count_) * this->get_plt_entry_size() | |
3089 | + this->first_plt_entry_offset()); | |
3090 | ||
3091 | ++this->count_; | |
3092 | ||
3093 | section_offset_type got_offset = this->got_plt_->current_data_size(); | |
3094 | ||
3095 | // Every PLT entry needs a GOT entry which points back to the PLT | |
3096 | // entry (this will be changed by the dynamic linker, normally | |
3097 | // lazily when the function is called). | |
3098 | this->got_plt_->set_current_data_size(got_offset + size / 8); | |
3099 | ||
3100 | // Every PLT entry needs a reloc. | |
3101 | gsym->set_needs_dynsym_entry(); | |
3102 | this->rel_->add_global(gsym, elfcpp::R_AARCH64_JUMP_SLOT, | |
3103 | this->got_plt_, got_offset, 0); | |
3104 | ||
3105 | // Note that we don't need to save the symbol. The contents of the | |
3106 | // PLT are independent of which symbols are used. The symbols only | |
3107 | // appear in the relocations. | |
3108 | } | |
3109 | ||
3a531937 JY |
3110 | // Return where the TLSDESC relocations should go, creating it if |
3111 | // necessary. These follow the JUMP_SLOT relocations. | |
3112 | ||
3113 | template<int size, bool big_endian> | |
3114 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
3115 | Output_data_plt_aarch64<size, big_endian>::rela_tlsdesc(Layout* layout) | |
3116 | { | |
3117 | if (this->tlsdesc_rel_ == NULL) | |
3118 | { | |
3119 | this->tlsdesc_rel_ = new Reloc_section(false); | |
3120 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3121 | elfcpp::SHF_ALLOC, this->tlsdesc_rel_, | |
3122 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3123 | gold_assert(this->tlsdesc_rel_->output_section() | |
3124 | == this->rel_->output_section()); | |
3125 | } | |
3126 | return this->tlsdesc_rel_; | |
3127 | } | |
3128 | ||
3129 | // Return where the IRELATIVE relocations should go in the PLT. These | |
3130 | // follow the JUMP_SLOT and the TLSDESC relocations. | |
3131 | ||
3132 | template<int size, bool big_endian> | |
3133 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
3134 | Output_data_plt_aarch64<size, big_endian>::rela_irelative(Symbol_table* symtab, | |
3135 | Layout* layout) | |
3136 | { | |
3137 | if (this->irelative_rel_ == NULL) | |
3138 | { | |
3139 | // Make sure we have a place for the TLSDESC relocations, in | |
3140 | // case we see any later on. | |
3141 | this->rela_tlsdesc(layout); | |
3142 | this->irelative_rel_ = new Reloc_section(false); | |
3143 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3144 | elfcpp::SHF_ALLOC, this->irelative_rel_, | |
3145 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3146 | gold_assert(this->irelative_rel_->output_section() | |
3147 | == this->rel_->output_section()); | |
3148 | ||
3149 | if (parameters->doing_static_link()) | |
3150 | { | |
3151 | // A statically linked executable will only have a .rela.plt | |
3152 | // section to hold R_AARCH64_IRELATIVE relocs for | |
3153 | // STT_GNU_IFUNC symbols. The library will use these | |
3154 | // symbols to locate the IRELATIVE relocs at program startup | |
3155 | // time. | |
3156 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
3157 | Symbol_table::PREDEFINED, | |
3158 | this->irelative_rel_, 0, 0, | |
3159 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3160 | elfcpp::STV_HIDDEN, 0, false, true); | |
3161 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
3162 | Symbol_table::PREDEFINED, | |
3163 | this->irelative_rel_, 0, 0, | |
3164 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
3165 | elfcpp::STV_HIDDEN, 0, true, true); | |
3166 | } | |
3167 | } | |
3168 | return this->irelative_rel_; | |
3169 | } | |
3170 | ||
9363c7c3 JY |
3171 | // Return the PLT address to use for a global symbol. |
3172 | ||
3173 | template<int size, bool big_endian> | |
3174 | uint64_t | |
3175 | Output_data_plt_aarch64<size, big_endian>::address_for_global( | |
3176 | const Symbol* gsym) | |
3177 | { | |
3178 | uint64_t offset = 0; | |
3179 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
3180 | && gsym->can_use_relative_reloc(false)) | |
3181 | offset = (this->first_plt_entry_offset() + | |
3182 | this->count_ * this->get_plt_entry_size()); | |
3183 | return this->address() + offset + gsym->plt_offset(); | |
3184 | } | |
3185 | ||
3186 | // Return the PLT address to use for a local symbol. These are always | |
3187 | // IRELATIVE relocs. | |
3188 | ||
3189 | template<int size, bool big_endian> | |
3190 | uint64_t | |
3191 | Output_data_plt_aarch64<size, big_endian>::address_for_local( | |
3192 | const Relobj* object, | |
3193 | unsigned int r_sym) | |
3194 | { | |
3195 | return (this->address() | |
3196 | + this->first_plt_entry_offset() | |
3197 | + this->count_ * this->get_plt_entry_size() | |
3198 | + object->local_plt_offset(r_sym)); | |
053a4d68 JY |
3199 | } |
3200 | ||
3201 | // Set the final size. | |
9363c7c3 | 3202 | |
053a4d68 JY |
3203 | template<int size, bool big_endian> |
3204 | void | |
3205 | Output_data_plt_aarch64<size, big_endian>::set_final_data_size() | |
3206 | { | |
3a531937 JY |
3207 | unsigned int count = this->count_ + this->irelative_count_; |
3208 | unsigned int extra_size = 0; | |
3209 | if (this->has_tlsdesc_entry()) | |
3210 | extra_size += this->get_plt_tlsdesc_entry_size(); | |
053a4d68 | 3211 | this->set_data_size(this->first_plt_entry_offset() |
3a531937 JY |
3212 | + count * this->get_plt_entry_size() |
3213 | + extra_size); | |
053a4d68 JY |
3214 | } |
3215 | ||
3216 | template<int size, bool big_endian> | |
3217 | class Output_data_plt_aarch64_standard : | |
3218 | public Output_data_plt_aarch64<size, big_endian> | |
3219 | { | |
3220 | public: | |
3221 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3a531937 JY |
3222 | Output_data_plt_aarch64_standard( |
3223 | Layout* layout, | |
3224 | Output_data_got_aarch64<size, big_endian>* got, | |
3225 | Output_data_space* got_plt, | |
3226 | Output_data_space* got_irelative) | |
053a4d68 | 3227 | : Output_data_plt_aarch64<size, big_endian>(layout, |
9363c7c3 | 3228 | size == 32 ? 4 : 8, |
3a531937 JY |
3229 | got, got_plt, |
3230 | got_irelative) | |
053a4d68 JY |
3231 | { } |
3232 | ||
3233 | protected: | |
3234 | // Return the offset of the first non-reserved PLT entry. | |
3235 | virtual unsigned int | |
3236 | do_first_plt_entry_offset() const | |
3237 | { return this->first_plt_entry_size; } | |
3238 | ||
3239 | // Return the size of a PLT entry | |
3240 | virtual unsigned int | |
3241 | do_get_plt_entry_size() const | |
3242 | { return this->plt_entry_size; } | |
3243 | ||
3a531937 JY |
3244 | // Return the size of a tlsdesc entry |
3245 | virtual unsigned int | |
3246 | do_get_plt_tlsdesc_entry_size() const | |
3247 | { return this->plt_tlsdesc_entry_size; } | |
3248 | ||
053a4d68 JY |
3249 | virtual void |
3250 | do_fill_first_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
3251 | Address got_address, |
3252 | Address plt_address); | |
053a4d68 JY |
3253 | |
3254 | virtual void | |
3255 | do_fill_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
3256 | Address got_address, |
3257 | Address plt_address, | |
3258 | unsigned int got_offset, | |
3259 | unsigned int plt_offset); | |
053a4d68 | 3260 | |
3a531937 JY |
3261 | virtual void |
3262 | do_fill_tlsdesc_entry(unsigned char* pov, | |
3263 | Address gotplt_address, | |
3264 | Address plt_address, | |
3265 | Address got_base, | |
3266 | unsigned int tlsdesc_got_offset, | |
3267 | unsigned int plt_offset); | |
3268 | ||
053a4d68 JY |
3269 | private: |
3270 | // The size of the first plt entry size. | |
3271 | static const int first_plt_entry_size = 32; | |
3272 | // The size of the plt entry size. | |
3273 | static const int plt_entry_size = 16; | |
3a531937 JY |
3274 | // The size of the plt tlsdesc entry size. |
3275 | static const int plt_tlsdesc_entry_size = 32; | |
053a4d68 JY |
3276 | // Template for the first PLT entry. |
3277 | static const uint32_t first_plt_entry[first_plt_entry_size / 4]; | |
3278 | // Template for subsequent PLT entries. | |
3279 | static const uint32_t plt_entry[plt_entry_size / 4]; | |
3a531937 JY |
3280 | // The reserved TLSDESC entry in the PLT for an executable. |
3281 | static const uint32_t tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4]; | |
053a4d68 JY |
3282 | }; |
3283 | ||
3284 | // The first entry in the PLT for an executable. | |
3285 | ||
3286 | template<> | |
3287 | const uint32_t | |
3288 | Output_data_plt_aarch64_standard<32, false>:: | |
3289 | first_plt_entry[first_plt_entry_size / 4] = | |
3290 | { | |
3291 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
3292 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
3293 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
3294 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
3295 | 0xd61f0220, /* br x17 */ | |
3296 | 0xd503201f, /* nop */ | |
3297 | 0xd503201f, /* nop */ | |
3298 | 0xd503201f, /* nop */ | |
3299 | }; | |
3300 | ||
83a01957 | 3301 | |
053a4d68 JY |
3302 | template<> |
3303 | const uint32_t | |
3304 | Output_data_plt_aarch64_standard<32, true>:: | |
3305 | first_plt_entry[first_plt_entry_size / 4] = | |
3306 | { | |
3307 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
3308 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
3309 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
3310 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
3311 | 0xd61f0220, /* br x17 */ | |
3312 | 0xd503201f, /* nop */ | |
3313 | 0xd503201f, /* nop */ | |
3314 | 0xd503201f, /* nop */ | |
3315 | }; | |
3316 | ||
83a01957 | 3317 | |
053a4d68 JY |
3318 | template<> |
3319 | const uint32_t | |
3320 | Output_data_plt_aarch64_standard<64, false>:: | |
3321 | first_plt_entry[first_plt_entry_size / 4] = | |
3322 | { | |
3323 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
3324 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
3325 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
3326 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
3327 | 0xd61f0220, /* br x17 */ | |
3328 | 0xd503201f, /* nop */ | |
3329 | 0xd503201f, /* nop */ | |
3330 | 0xd503201f, /* nop */ | |
3331 | }; | |
3332 | ||
83a01957 | 3333 | |
053a4d68 JY |
3334 | template<> |
3335 | const uint32_t | |
3336 | Output_data_plt_aarch64_standard<64, true>:: | |
3337 | first_plt_entry[first_plt_entry_size / 4] = | |
3338 | { | |
3339 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
3340 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
3341 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
3342 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
3343 | 0xd61f0220, /* br x17 */ | |
3344 | 0xd503201f, /* nop */ | |
3345 | 0xd503201f, /* nop */ | |
3346 | 0xd503201f, /* nop */ | |
3347 | }; | |
3348 | ||
83a01957 | 3349 | |
053a4d68 JY |
3350 | template<> |
3351 | const uint32_t | |
3352 | Output_data_plt_aarch64_standard<32, false>:: | |
3353 | plt_entry[plt_entry_size / 4] = | |
3354 | { | |
3355 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
3356 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
3357 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
3358 | 0xd61f0220, /* br x17. */ | |
3359 | }; | |
3360 | ||
83a01957 | 3361 | |
053a4d68 JY |
3362 | template<> |
3363 | const uint32_t | |
3364 | Output_data_plt_aarch64_standard<32, true>:: | |
3365 | plt_entry[plt_entry_size / 4] = | |
3366 | { | |
3367 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
3368 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
3369 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
3370 | 0xd61f0220, /* br x17. */ | |
3371 | }; | |
3372 | ||
83a01957 | 3373 | |
053a4d68 JY |
3374 | template<> |
3375 | const uint32_t | |
3376 | Output_data_plt_aarch64_standard<64, false>:: | |
3377 | plt_entry[plt_entry_size / 4] = | |
3378 | { | |
3379 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
3380 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
3381 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
3382 | 0xd61f0220, /* br x17. */ | |
3383 | }; | |
3384 | ||
83a01957 | 3385 | |
053a4d68 JY |
3386 | template<> |
3387 | const uint32_t | |
3388 | Output_data_plt_aarch64_standard<64, true>:: | |
3389 | plt_entry[plt_entry_size / 4] = | |
3390 | { | |
3391 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
3392 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
3393 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
3394 | 0xd61f0220, /* br x17. */ | |
3395 | }; | |
3396 | ||
83a01957 | 3397 | |
053a4d68 JY |
3398 | template<int size, bool big_endian> |
3399 | void | |
3400 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_first_plt_entry( | |
3401 | unsigned char* pov, | |
9363c7c3 JY |
3402 | Address got_address, |
3403 | Address plt_address) | |
053a4d68 JY |
3404 | { |
3405 | // PLT0 of the small PLT looks like this in ELF64 - | |
3406 | // stp x16, x30, [sp, #-16]! Save the reloc and lr on stack. | |
3407 | // adrp x16, PLT_GOT + 16 Get the page base of the GOTPLT | |
3408 | // ldr x17, [x16, #:lo12:PLT_GOT+16] Load the address of the | |
3409 | // symbol resolver | |
3410 | // add x16, x16, #:lo12:PLT_GOT+16 Load the lo12 bits of the | |
3411 | // GOTPLT entry for this. | |
3412 | // br x17 | |
3413 | // PLT0 will be slightly different in ELF32 due to different got entry | |
3414 | // size. | |
3415 | memcpy(pov, this->first_plt_entry, this->first_plt_entry_size); | |
9363c7c3 JY |
3416 | Address gotplt_2nd_ent = got_address + (size / 8) * 2; |
3417 | ||
3418 | // Fill in the top 21 bits for this: ADRP x16, PLT_GOT + 8 * 2. | |
3419 | // ADRP: (PG(S+A)-PG(P)) >> 12) & 0x1fffff. | |
3420 | // FIXME: This only works for 64bit | |
3421 | AArch64_relocate_functions<size, big_endian>::adrp(pov + 4, | |
3422 | gotplt_2nd_ent, plt_address + 4); | |
3423 | ||
3424 | // Fill in R_AARCH64_LDST8_LO12 | |
3425 | elfcpp::Swap<32, big_endian>::writeval( | |
3426 | pov + 8, | |
3427 | ((this->first_plt_entry[2] & 0xffc003ff) | |
3428 | | ((gotplt_2nd_ent & 0xff8) << 7))); | |
3429 | ||
3430 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
3431 | elfcpp::Swap<32, big_endian>::writeval( | |
3432 | pov + 12, | |
3433 | ((this->first_plt_entry[3] & 0xffc003ff) | |
3434 | | ((gotplt_2nd_ent & 0xfff) << 10))); | |
053a4d68 JY |
3435 | } |
3436 | ||
83a01957 | 3437 | |
053a4d68 | 3438 | // Subsequent entries in the PLT for an executable. |
9363c7c3 | 3439 | // FIXME: This only works for 64bit |
053a4d68 JY |
3440 | |
3441 | template<int size, bool big_endian> | |
3442 | void | |
3443 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_plt_entry( | |
3444 | unsigned char* pov, | |
9363c7c3 JY |
3445 | Address got_address, |
3446 | Address plt_address, | |
3447 | unsigned int got_offset, | |
3448 | unsigned int plt_offset) | |
053a4d68 JY |
3449 | { |
3450 | memcpy(pov, this->plt_entry, this->plt_entry_size); | |
9363c7c3 JY |
3451 | |
3452 | Address gotplt_entry_address = got_address + got_offset; | |
3453 | Address plt_entry_address = plt_address + plt_offset; | |
3454 | ||
3455 | // Fill in R_AARCH64_PCREL_ADR_HI21 | |
3456 | AArch64_relocate_functions<size, big_endian>::adrp( | |
3457 | pov, | |
3458 | gotplt_entry_address, | |
3459 | plt_entry_address); | |
3460 | ||
3461 | // Fill in R_AARCH64_LDST64_ABS_LO12 | |
3462 | elfcpp::Swap<32, big_endian>::writeval( | |
3463 | pov + 4, | |
3464 | ((this->plt_entry[1] & 0xffc003ff) | |
3465 | | ((gotplt_entry_address & 0xff8) << 7))); | |
3466 | ||
3467 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
3468 | elfcpp::Swap<32, big_endian>::writeval( | |
3469 | pov + 8, | |
3470 | ((this->plt_entry[2] & 0xffc003ff) | |
3471 | | ((gotplt_entry_address & 0xfff) <<10))); | |
3472 | ||
053a4d68 JY |
3473 | } |
3474 | ||
3a531937 JY |
3475 | |
3476 | template<> | |
3477 | const uint32_t | |
3478 | Output_data_plt_aarch64_standard<32, false>:: | |
3479 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
3480 | { | |
3481 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
3482 | 0x90000002, /* adrp x2, 0 */ | |
3483 | 0x90000003, /* adrp x3, 0 */ | |
3484 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
3485 | 0x11000063, /* add w3, w3, 0 */ | |
3486 | 0xd61f0040, /* br x2 */ | |
3487 | 0xd503201f, /* nop */ | |
3488 | 0xd503201f, /* nop */ | |
3489 | }; | |
3490 | ||
3491 | template<> | |
3492 | const uint32_t | |
3493 | Output_data_plt_aarch64_standard<32, true>:: | |
3494 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
3495 | { | |
3496 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
3497 | 0x90000002, /* adrp x2, 0 */ | |
3498 | 0x90000003, /* adrp x3, 0 */ | |
3499 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
3500 | 0x11000063, /* add w3, w3, 0 */ | |
3501 | 0xd61f0040, /* br x2 */ | |
3502 | 0xd503201f, /* nop */ | |
3503 | 0xd503201f, /* nop */ | |
3504 | }; | |
3505 | ||
3506 | template<> | |
3507 | const uint32_t | |
3508 | Output_data_plt_aarch64_standard<64, false>:: | |
3509 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
3510 | { | |
3511 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
3512 | 0x90000002, /* adrp x2, 0 */ | |
3513 | 0x90000003, /* adrp x3, 0 */ | |
3514 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
3515 | 0x91000063, /* add x3, x3, 0 */ | |
3516 | 0xd61f0040, /* br x2 */ | |
3517 | 0xd503201f, /* nop */ | |
3518 | 0xd503201f, /* nop */ | |
3519 | }; | |
3520 | ||
3521 | template<> | |
3522 | const uint32_t | |
3523 | Output_data_plt_aarch64_standard<64, true>:: | |
3524 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
3525 | { | |
3526 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
3527 | 0x90000002, /* adrp x2, 0 */ | |
3528 | 0x90000003, /* adrp x3, 0 */ | |
3529 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
3530 | 0x91000063, /* add x3, x3, 0 */ | |
3531 | 0xd61f0040, /* br x2 */ | |
3532 | 0xd503201f, /* nop */ | |
3533 | 0xd503201f, /* nop */ | |
3534 | }; | |
3535 | ||
3536 | template<int size, bool big_endian> | |
3537 | void | |
3538 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_tlsdesc_entry( | |
3539 | unsigned char* pov, | |
3540 | Address gotplt_address, | |
3541 | Address plt_address, | |
3542 | Address got_base, | |
3543 | unsigned int tlsdesc_got_offset, | |
3544 | unsigned int plt_offset) | |
3545 | { | |
3546 | memcpy(pov, tlsdesc_plt_entry, plt_tlsdesc_entry_size); | |
3547 | ||
3548 | // move DT_TLSDESC_GOT address into x2 | |
3549 | // move .got.plt address into x3 | |
3550 | Address tlsdesc_got_entry = got_base + tlsdesc_got_offset; | |
3551 | Address plt_entry_address = plt_address + plt_offset; | |
3552 | ||
3553 | // R_AARCH64_ADR_PREL_PG_HI21 | |
3554 | AArch64_relocate_functions<size, big_endian>::adrp( | |
3555 | pov + 4, | |
3556 | tlsdesc_got_entry, | |
3557 | plt_entry_address + 4); | |
3558 | ||
3559 | // R_AARCH64_ADR_PREL_PG_HI21 | |
3560 | AArch64_relocate_functions<size, big_endian>::adrp( | |
3561 | pov + 8, | |
3562 | gotplt_address, | |
3563 | plt_entry_address + 8); | |
3564 | ||
3565 | // R_AARCH64_LDST64_ABS_LO12 | |
3566 | elfcpp::Swap<32, big_endian>::writeval( | |
3567 | pov + 12, | |
3568 | ((this->tlsdesc_plt_entry[3] & 0xffc003ff) | |
3569 | | ((tlsdesc_got_entry & 0xff8) << 7))); | |
3570 | ||
3571 | // R_AARCH64_ADD_ABS_LO12 | |
3572 | elfcpp::Swap<32, big_endian>::writeval( | |
3573 | pov + 16, | |
3574 | ((this->tlsdesc_plt_entry[4] & 0xffc003ff) | |
3575 | | ((gotplt_address & 0xfff) << 10))); | |
3576 | } | |
3577 | ||
053a4d68 JY |
3578 | // Write out the PLT. This uses the hand-coded instructions above, |
3579 | // and adjusts them as needed. This is specified by the AMD64 ABI. | |
3580 | ||
3581 | template<int size, bool big_endian> | |
3582 | void | |
3583 | Output_data_plt_aarch64<size, big_endian>::do_write(Output_file* of) | |
3584 | { | |
3585 | const off_t offset = this->offset(); | |
3586 | const section_size_type oview_size = | |
3587 | convert_to_section_size_type(this->data_size()); | |
3588 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3589 | ||
3590 | const off_t got_file_offset = this->got_plt_->offset(); | |
3591 | const section_size_type got_size = | |
3592 | convert_to_section_size_type(this->got_plt_->data_size()); | |
3593 | unsigned char* const got_view = of->get_output_view(got_file_offset, | |
3594 | got_size); | |
3595 | ||
3596 | unsigned char* pov = oview; | |
3597 | ||
3598 | // The base address of the .plt section. | |
3599 | typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address(); | |
053a4d68 | 3600 | // The base address of the PLT portion of the .got section. |
3a531937 JY |
3601 | typename elfcpp::Elf_types<size>::Elf_Addr gotplt_address |
3602 | = this->got_plt_->address(); | |
053a4d68 | 3603 | |
3a531937 | 3604 | this->fill_first_plt_entry(pov, gotplt_address, plt_address); |
053a4d68 JY |
3605 | pov += this->first_plt_entry_offset(); |
3606 | ||
3607 | // The first three entries in .got.plt are reserved. | |
3608 | unsigned char* got_pov = got_view; | |
3609 | memset(got_pov, 0, size / 8 * AARCH64_GOTPLT_RESERVE_COUNT); | |
3610 | got_pov += (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
3611 | ||
3612 | unsigned int plt_offset = this->first_plt_entry_offset(); | |
3613 | unsigned int got_offset = (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
3a531937 | 3614 | const unsigned int count = this->count_ + this->irelative_count_; |
053a4d68 JY |
3615 | for (unsigned int plt_index = 0; |
3616 | plt_index < count; | |
3617 | ++plt_index, | |
3618 | pov += this->get_plt_entry_size(), | |
3619 | got_pov += size / 8, | |
3620 | plt_offset += this->get_plt_entry_size(), | |
3621 | got_offset += size / 8) | |
3622 | { | |
3623 | // Set and adjust the PLT entry itself. | |
3a531937 | 3624 | this->fill_plt_entry(pov, gotplt_address, plt_address, |
9363c7c3 | 3625 | got_offset, plt_offset); |
053a4d68 | 3626 | |
9363c7c3 JY |
3627 | // Set the entry in the GOT, which points to plt0. |
3628 | elfcpp::Swap<size, big_endian>::writeval(got_pov, plt_address); | |
053a4d68 JY |
3629 | } |
3630 | ||
3a531937 JY |
3631 | if (this->has_tlsdesc_entry()) |
3632 | { | |
3633 | // Set and adjust the reserved TLSDESC PLT entry. | |
3634 | unsigned int tlsdesc_got_offset = this->get_tlsdesc_got_offset(); | |
3635 | // The base address of the .base section. | |
3636 | typename elfcpp::Elf_types<size>::Elf_Addr got_base = | |
3637 | this->got_->address(); | |
3638 | this->fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
3639 | tlsdesc_got_offset, plt_offset); | |
3640 | pov += this->get_plt_tlsdesc_entry_size(); | |
3641 | } | |
3642 | ||
053a4d68 JY |
3643 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
3644 | gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size); | |
3645 | ||
3646 | of->write_output_view(offset, oview_size, oview); | |
3647 | of->write_output_view(got_file_offset, got_size, got_view); | |
3648 | } | |
3649 | ||
9363c7c3 JY |
3650 | // Telling how to update the immediate field of an instruction. |
3651 | struct AArch64_howto | |
3652 | { | |
3653 | // The immediate field mask. | |
3654 | elfcpp::Elf_Xword dst_mask; | |
3655 | ||
3656 | // The offset to apply relocation immediate | |
3657 | int doffset; | |
3658 | ||
3659 | // The second part offset, if the immediate field has two parts. | |
3660 | // -1 if the immediate field has only one part. | |
3661 | int doffset2; | |
3662 | }; | |
3663 | ||
3664 | static const AArch64_howto aarch64_howto[AArch64_reloc_property::INST_NUM] = | |
3665 | { | |
3666 | {0, -1, -1}, // DATA | |
3667 | {0x1fffe0, 5, -1}, // MOVW [20:5]-imm16 | |
3668 | {0xffffe0, 5, -1}, // LD [23:5]-imm19 | |
3669 | {0x60ffffe0, 29, 5}, // ADR [30:29]-immlo [23:5]-immhi | |
3670 | {0x60ffffe0, 29, 5}, // ADRP [30:29]-immlo [23:5]-immhi | |
3671 | {0x3ffc00, 10, -1}, // ADD [21:10]-imm12 | |
3672 | {0x3ffc00, 10, -1}, // LDST [21:10]-imm12 | |
3673 | {0x7ffe0, 5, -1}, // TBZNZ [18:5]-imm14 | |
3674 | {0xffffe0, 5, -1}, // CONDB [23:5]-imm19 | |
3675 | {0x3ffffff, 0, -1}, // B [25:0]-imm26 | |
3676 | {0x3ffffff, 0, -1}, // CALL [25:0]-imm26 | |
3677 | }; | |
3678 | ||
3679 | // AArch64 relocate function class | |
3680 | ||
3681 | template<int size, bool big_endian> | |
3682 | class AArch64_relocate_functions | |
3683 | { | |
3684 | public: | |
3685 | typedef enum | |
3686 | { | |
3687 | STATUS_OKAY, // No error during relocation. | |
3688 | STATUS_OVERFLOW, // Relocation overflow. | |
3689 | STATUS_BAD_RELOC, // Relocation cannot be applied. | |
3690 | } Status; | |
3691 | ||
9363c7c3 JY |
3692 | typedef AArch64_relocate_functions<size, big_endian> This; |
3693 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
83a01957 HS |
3694 | typedef Relocate_info<size, big_endian> The_relocate_info; |
3695 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; | |
3696 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
3697 | typedef typename The_reloc_stub::Stub_type The_reloc_stub_type; | |
3698 | typedef Stub_table<size, big_endian> The_stub_table; | |
3699 | typedef elfcpp::Rela<size, big_endian> The_rela; | |
9363c7c3 JY |
3700 | |
3701 | // Return the page address of the address. | |
3702 | // Page(address) = address & ~0xFFF | |
3703 | ||
3704 | static inline typename elfcpp::Swap<size, big_endian>::Valtype | |
3705 | Page(Address address) | |
3706 | { | |
3707 | return (address & (~static_cast<Address>(0xFFF))); | |
3708 | } | |
3709 | ||
83a01957 | 3710 | private: |
9363c7c3 JY |
3711 | // Update instruction (pointed by view) with selected bits (immed). |
3712 | // val = (val & ~dst_mask) | (immed << doffset) | |
3713 | ||
3714 | template<int valsize> | |
3715 | static inline void | |
3716 | update_view(unsigned char* view, | |
3717 | typename elfcpp::Swap<size, big_endian>::Valtype immed, | |
3718 | elfcpp::Elf_Xword doffset, | |
3719 | elfcpp::Elf_Xword dst_mask) | |
3720 | { | |
3721 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
3722 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3723 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
3724 | ||
3725 | // Clear immediate fields. | |
3726 | val &= ~dst_mask; | |
3727 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
3728 | static_cast<Valtype>(val | (immed << doffset))); | |
3729 | } | |
3730 | ||
3731 | // Update two parts of an instruction (pointed by view) with selected | |
3732 | // bits (immed1 and immed2). | |
3733 | // val = (val & ~dst_mask) | (immed1 << doffset1) | (immed2 << doffset2) | |
3734 | ||
3735 | template<int valsize> | |
3736 | static inline void | |
3737 | update_view_two_parts( | |
3738 | unsigned char* view, | |
3739 | typename elfcpp::Swap<size, big_endian>::Valtype immed1, | |
3740 | typename elfcpp::Swap<size, big_endian>::Valtype immed2, | |
3741 | elfcpp::Elf_Xword doffset1, | |
3742 | elfcpp::Elf_Xword doffset2, | |
3743 | elfcpp::Elf_Xword dst_mask) | |
3744 | { | |
3745 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
3746 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3747 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
3748 | val &= ~dst_mask; | |
3749 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
3750 | static_cast<Valtype>(val | (immed1 << doffset1) | | |
3751 | (immed2 << doffset2))); | |
3752 | } | |
3753 | ||
3754 | // Update adr or adrp instruction with [32:12] of X. | |
3755 | // In adr and adrp: [30:29] immlo [23:5] immhi | |
3756 | ||
3757 | static inline void | |
3758 | update_adr(unsigned char* view, | |
3759 | typename elfcpp::Swap<size, big_endian>::Valtype x, | |
3760 | const AArch64_reloc_property* /* reloc_property */) | |
3761 | { | |
3762 | elfcpp::Elf_Xword dst_mask = (0x3 << 29) | (0x7ffff << 5); | |
3763 | typename elfcpp::Swap<32, big_endian>::Valtype immed = | |
3764 | (x >> 12) & 0x1fffff; | |
3765 | This::template update_view_two_parts<32>( | |
3766 | view, | |
3767 | immed & 0x3, | |
3768 | (immed & 0x1ffffc) >> 2, | |
3769 | 29, | |
3770 | 5, | |
3771 | dst_mask); | |
3772 | } | |
3773 | ||
3a531937 JY |
3774 | // Update movz/movn instruction with bits immed. |
3775 | // Set instruction to movz if is_movz is true, otherwise set instruction | |
3776 | // to movn. | |
3777 | static inline void | |
3778 | update_movnz(unsigned char* view, | |
3779 | typename elfcpp::Swap<size, big_endian>::Valtype immed, | |
3780 | bool is_movz) | |
3781 | { | |
3782 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
3783 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3784 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
3785 | ||
3786 | const elfcpp::Elf_Xword doffset = | |
3787 | aarch64_howto[AArch64_reloc_property::INST_MOVW].doffset; | |
3788 | const elfcpp::Elf_Xword dst_mask = | |
3789 | aarch64_howto[AArch64_reloc_property::INST_MOVW].dst_mask; | |
3790 | ||
3791 | // Clear immediate fields and opc code. | |
3792 | val &= ~(dst_mask | (0x11 << 29)); | |
3793 | ||
3794 | // Set instruction to movz or movn. | |
3795 | // movz: [30:29] is 10 movn: [30:29] is 00 | |
3796 | if (is_movz) | |
3797 | val |= (0x10 << 29); | |
3798 | ||
3799 | elfcpp::Swap<32, big_endian>::writeval(wv, | |
3800 | static_cast<Valtype>(val | (immed << doffset))); | |
3801 | } | |
3802 | ||
9363c7c3 JY |
3803 | public: |
3804 | ||
3805 | // Do a simple rela relocation at unaligned addresses. | |
3806 | ||
3807 | template<int valsize> | |
3808 | static inline typename This::Status | |
3809 | rela_ua(unsigned char* view, | |
3810 | const Sized_relobj_file<size, big_endian>* object, | |
3811 | const Symbol_value<size>* psymval, | |
3812 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3813 | const AArch64_reloc_property* reloc_property) | |
3814 | { | |
3815 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
3816 | Valtype; | |
3817 | typename elfcpp::Elf_types<size>::Elf_Addr x = | |
3818 | psymval->value(object, addend); | |
3819 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, | |
3820 | static_cast<Valtype>(x)); | |
3821 | return (reloc_property->checkup_x_value(x) | |
3822 | ? This::STATUS_OKAY | |
3823 | : This::STATUS_OVERFLOW); | |
3824 | } | |
3825 | ||
3826 | // Do a simple pc-relative relocation at unaligned addresses. | |
3827 | ||
3828 | template<int valsize> | |
3829 | static inline typename This::Status | |
3830 | pcrela_ua(unsigned char* view, | |
3831 | const Sized_relobj_file<size, big_endian>* object, | |
3832 | const Symbol_value<size>* psymval, | |
3833 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3834 | Address address, | |
3835 | const AArch64_reloc_property* reloc_property) | |
3836 | { | |
3837 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
3838 | Valtype; | |
3a531937 | 3839 | Address x = psymval->value(object, addend) - address; |
9363c7c3 JY |
3840 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, |
3841 | static_cast<Valtype>(x)); | |
3842 | return (reloc_property->checkup_x_value(x) | |
3843 | ? This::STATUS_OKAY | |
3844 | : This::STATUS_OVERFLOW); | |
3845 | } | |
3846 | ||
3847 | // Do a simple rela relocation at aligned addresses. | |
3848 | ||
3849 | template<int valsize> | |
3850 | static inline typename This::Status | |
3851 | rela( | |
3852 | unsigned char* view, | |
3853 | const Sized_relobj_file<size, big_endian>* object, | |
3854 | const Symbol_value<size>* psymval, | |
3855 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3856 | const AArch64_reloc_property* reloc_property) | |
3857 | { | |
3858 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype | |
3859 | Valtype; | |
3860 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3a531937 | 3861 | Address x = psymval->value(object, addend); |
9363c7c3 JY |
3862 | elfcpp::Swap<valsize, big_endian>::writeval(wv, |
3863 | static_cast<Valtype>(x)); | |
3864 | return (reloc_property->checkup_x_value(x) | |
3865 | ? This::STATUS_OKAY | |
3866 | : This::STATUS_OVERFLOW); | |
3867 | } | |
3868 | ||
3869 | // Do relocate. Update selected bits in text. | |
3870 | // new_val = (val & ~dst_mask) | (immed << doffset) | |
3871 | ||
3872 | template<int valsize> | |
3873 | static inline typename This::Status | |
3874 | rela_general(unsigned char* view, | |
3875 | const Sized_relobj_file<size, big_endian>* object, | |
3876 | const Symbol_value<size>* psymval, | |
3877 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3878 | const AArch64_reloc_property* reloc_property) | |
3879 | { | |
3880 | // Calculate relocation. | |
83a01957 | 3881 | Address x = psymval->value(object, addend); |
9363c7c3 JY |
3882 | |
3883 | // Select bits from X. | |
3884 | Address immed = reloc_property->select_x_value(x); | |
3885 | ||
3886 | // Update view. | |
3887 | const AArch64_reloc_property::Reloc_inst inst = | |
3a531937 | 3888 | reloc_property->reloc_inst(); |
9363c7c3 JY |
3889 | // If it is a data relocation or instruction has 2 parts of immediate |
3890 | // fields, you should not call rela_general. | |
3891 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
3892 | aarch64_howto[inst].doffset != -1); | |
3893 | This::template update_view<valsize>(view, immed, | |
3894 | aarch64_howto[inst].doffset, | |
3895 | aarch64_howto[inst].dst_mask); | |
3896 | ||
3897 | // Do check overflow or alignment if needed. | |
3898 | return (reloc_property->checkup_x_value(x) | |
3899 | ? This::STATUS_OKAY | |
3900 | : This::STATUS_OVERFLOW); | |
3901 | } | |
3902 | ||
3903 | // Do relocate. Update selected bits in text. | |
3904 | // new val = (val & ~dst_mask) | (immed << doffset) | |
3905 | ||
3906 | template<int valsize> | |
3907 | static inline typename This::Status | |
3908 | rela_general( | |
3909 | unsigned char* view, | |
3910 | typename elfcpp::Swap<size, big_endian>::Valtype s, | |
3911 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3912 | const AArch64_reloc_property* reloc_property) | |
3913 | { | |
3914 | // Calculate relocation. | |
3915 | Address x = s + addend; | |
3916 | ||
3917 | // Select bits from X. | |
3918 | Address immed = reloc_property->select_x_value(x); | |
3919 | ||
3920 | // Update view. | |
3921 | const AArch64_reloc_property::Reloc_inst inst = | |
3a531937 | 3922 | reloc_property->reloc_inst(); |
9363c7c3 JY |
3923 | // If it is a data relocation or instruction has 2 parts of immediate |
3924 | // fields, you should not call rela_general. | |
3925 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
3926 | aarch64_howto[inst].doffset != -1); | |
3927 | This::template update_view<valsize>(view, immed, | |
3928 | aarch64_howto[inst].doffset, | |
3929 | aarch64_howto[inst].dst_mask); | |
3930 | ||
3931 | // Do check overflow or alignment if needed. | |
3932 | return (reloc_property->checkup_x_value(x) | |
3933 | ? This::STATUS_OKAY | |
3934 | : This::STATUS_OVERFLOW); | |
3935 | } | |
3936 | ||
3937 | // Do address relative relocate. Update selected bits in text. | |
3938 | // new val = (val & ~dst_mask) | (immed << doffset) | |
3939 | ||
3940 | template<int valsize> | |
3941 | static inline typename This::Status | |
3942 | pcrela_general( | |
3943 | unsigned char* view, | |
3944 | const Sized_relobj_file<size, big_endian>* object, | |
3945 | const Symbol_value<size>* psymval, | |
3946 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
3947 | Address address, | |
3948 | const AArch64_reloc_property* reloc_property) | |
3949 | { | |
3950 | // Calculate relocation. | |
3a531937 | 3951 | Address x = psymval->value(object, addend) - address; |
9363c7c3 JY |
3952 | |
3953 | // Select bits from X. | |
3954 | Address immed = reloc_property->select_x_value(x); | |
3955 | ||
3956 | // Update view. | |
3957 | const AArch64_reloc_property::Reloc_inst inst = | |
3958 | reloc_property->reloc_inst(); | |
3959 | // If it is a data relocation or instruction has 2 parts of immediate | |
3960 | // fields, you should not call pcrela_general. | |
3961 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
3962 | aarch64_howto[inst].doffset != -1); | |
3963 | This::template update_view<valsize>(view, immed, | |
3964 | aarch64_howto[inst].doffset, | |
3965 | aarch64_howto[inst].dst_mask); | |
3966 | ||
3967 | // Do check overflow or alignment if needed. | |
3968 | return (reloc_property->checkup_x_value(x) | |
3969 | ? This::STATUS_OKAY | |
3970 | : This::STATUS_OVERFLOW); | |
3971 | } | |
3972 | ||
3973 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
3974 | // R_AARCH64_ADR_PREL_PG_HI21 | |
3975 | ||
3976 | static inline typename This::Status | |
3977 | adrp( | |
3978 | unsigned char* view, | |
3979 | Address sa, | |
3980 | Address address) | |
3981 | { | |
3982 | typename elfcpp::Swap<size, big_endian>::Valtype x = | |
83a01957 | 3983 | This::Page(sa) - This::Page(address); |
9363c7c3 | 3984 | update_adr(view, x, NULL); |
83a01957 HS |
3985 | // Check -2^32 <= X < 2^32 |
3986 | return (size == 64 && Bits<33>::has_overflow((x)) | |
9363c7c3 JY |
3987 | ? This::STATUS_OVERFLOW |
3988 | : This::STATUS_OKAY); | |
3989 | } | |
3990 | ||
3991 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
3992 | // R_AARCH64_ADR_PREL_PG_HI21 | |
3993 | ||
3994 | static inline typename This::Status | |
3995 | adrp(unsigned char* view, | |
3996 | const Sized_relobj_file<size, big_endian>* object, | |
3997 | const Symbol_value<size>* psymval, | |
3998 | Address addend, | |
3999 | Address address, | |
4000 | const AArch64_reloc_property* reloc_property) | |
4001 | { | |
4002 | Address sa = psymval->value(object, addend); | |
4003 | typename elfcpp::Swap<size, big_endian>::Valtype x = | |
4004 | This::Page(sa) - This::Page(address); | |
4005 | update_adr(view, x, reloc_property); | |
4006 | return (reloc_property->checkup_x_value(x) | |
4007 | ? This::STATUS_OKAY | |
4008 | : This::STATUS_OVERFLOW); | |
4009 | } | |
4010 | ||
3a531937 JY |
4011 | // Update mov[n/z] instruction. Check overflow if needed. |
4012 | // If X >=0, set the instruction to movz and its immediate value to the | |
4013 | // selected bits S. | |
4014 | // If X < 0, set the instruction to movn and its immediate value to | |
4015 | // NOT (selected bits of). | |
4016 | ||
4017 | static inline typename This::Status | |
4018 | movnz(unsigned char* view, | |
4019 | typename elfcpp::Swap<size, big_endian>::Valtype x, | |
4020 | const AArch64_reloc_property* reloc_property) | |
4021 | { | |
4022 | // Select bits from X. | |
4023 | Address immed = reloc_property->select_x_value(x); | |
4024 | bool is_movz = true; | |
4025 | if (static_cast<int64_t>(x) < 0) | |
4026 | { | |
4027 | immed = ~immed; | |
4028 | is_movz = false; | |
4029 | } | |
4030 | ||
4031 | // Update movnz instruction. | |
4032 | update_movnz(view, immed, is_movz); | |
4033 | ||
4034 | // Do check overflow or alignment if needed. | |
4035 | return (reloc_property->checkup_x_value(x) | |
4036 | ? This::STATUS_OKAY | |
4037 | : This::STATUS_OVERFLOW); | |
4038 | } | |
4039 | ||
83a01957 HS |
4040 | static inline bool |
4041 | maybe_apply_stub(unsigned int, | |
4042 | const The_relocate_info*, | |
4043 | const The_rela&, | |
4044 | unsigned char*, | |
4045 | Address, | |
4046 | const Sized_symbol<size>*, | |
4047 | const Symbol_value<size>*, | |
4048 | const Sized_relobj_file<size, big_endian>*); | |
4049 | ||
3a531937 JY |
4050 | }; // End of AArch64_relocate_functions |
4051 | ||
4052 | ||
83a01957 HS |
4053 | // For a certain relocation type (usually jump/branch), test to see if the |
4054 | // destination needs a stub to fulfil. If so, re-route the destination of the | |
4055 | // original instruction to the stub, note, at this time, the stub has already | |
4056 | // been generated. | |
4057 | ||
4058 | template<int size, bool big_endian> | |
4059 | bool | |
4060 | AArch64_relocate_functions<size, big_endian>:: | |
4061 | maybe_apply_stub(unsigned int r_type, | |
4062 | const The_relocate_info* relinfo, | |
4063 | const The_rela& rela, | |
4064 | unsigned char* view, | |
4065 | Address address, | |
4066 | const Sized_symbol<size>* gsym, | |
4067 | const Symbol_value<size>* psymval, | |
4068 | const Sized_relobj_file<size, big_endian>* object) | |
4069 | { | |
4070 | if (parameters->options().relocatable()) | |
4071 | return false; | |
4072 | ||
4073 | typename elfcpp::Elf_types<size>::Elf_Swxword addend = rela.get_r_addend(); | |
4074 | Address branch_target = psymval->value(object, 0) + addend; | |
4075 | The_reloc_stub_type stub_type = The_reloc_stub:: | |
4076 | stub_type_for_reloc(r_type, address, branch_target); | |
4077 | if (stub_type == The_reloc_stub::ST_NONE) | |
4078 | return false; | |
4079 | ||
4080 | const The_aarch64_relobj* aarch64_relobj = | |
4081 | static_cast<const The_aarch64_relobj*>(object); | |
4082 | The_stub_table* stub_table = aarch64_relobj->stub_table(relinfo->data_shndx); | |
4083 | gold_assert(stub_table != NULL); | |
4084 | ||
4085 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4086 | typename The_reloc_stub::Key stub_key(stub_type, gsym, object, r_sym, addend); | |
4087 | The_reloc_stub* stub = stub_table->find_reloc_stub(stub_key); | |
4088 | gold_assert(stub != NULL); | |
4089 | ||
4090 | Address new_branch_target = stub_table->address() + stub->offset(); | |
4091 | typename elfcpp::Swap<size, big_endian>::Valtype branch_offset = | |
4092 | new_branch_target - address; | |
4093 | const AArch64_reloc_property* arp = | |
4094 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
4095 | gold_assert(arp != NULL); | |
4096 | This::Status status = This::template | |
4097 | rela_general<32>(view, branch_offset, 0, arp); | |
4098 | if (status != This::STATUS_OKAY) | |
4099 | gold_error(_("Stub is too far away, try a smaller value " | |
4100 | "for '--stub-group-size'. For example, 0x2000000.")); | |
4101 | return true; | |
4102 | } | |
4103 | ||
4104 | ||
4105 | // Group input sections for stub generation. | |
4106 | // | |
4107 | // We group input sections in an output section so that the total size, | |
4108 | // including any padding space due to alignment is smaller than GROUP_SIZE | |
4109 | // unless the only input section in group is bigger than GROUP_SIZE already. | |
4110 | // Then an ARM stub table is created to follow the last input section | |
4111 | // in group. For each group an ARM stub table is created an is placed | |
4112 | // after the last group. If STUB_ALWAYS_AFTER_BRANCH is false, we further | |
4113 | // extend the group after the stub table. | |
4114 | ||
4115 | template<int size, bool big_endian> | |
4116 | void | |
4117 | Target_aarch64<size, big_endian>::group_sections( | |
4118 | Layout* layout, | |
4119 | section_size_type group_size, | |
4120 | bool stubs_always_after_branch, | |
4121 | const Task* task) | |
4122 | { | |
4123 | // Group input sections and insert stub table | |
4124 | Layout::Section_list section_list; | |
4125 | layout->get_executable_sections(§ion_list); | |
4126 | for (Layout::Section_list::const_iterator p = section_list.begin(); | |
4127 | p != section_list.end(); | |
4128 | ++p) | |
4129 | { | |
4130 | AArch64_output_section<size, big_endian>* output_section = | |
4131 | static_cast<AArch64_output_section<size, big_endian>*>(*p); | |
4132 | output_section->group_sections(group_size, stubs_always_after_branch, | |
4133 | this, task); | |
4134 | } | |
4135 | } | |
4136 | ||
4137 | ||
4138 | // Find the AArch64_input_section object corresponding to the SHNDX-th input | |
4139 | // section of RELOBJ. | |
4140 | ||
4141 | template<int size, bool big_endian> | |
4142 | AArch64_input_section<size, big_endian>* | |
4143 | Target_aarch64<size, big_endian>::find_aarch64_input_section( | |
4144 | Relobj* relobj, unsigned int shndx) const | |
4145 | { | |
4146 | Section_id sid(relobj, shndx); | |
4147 | typename AArch64_input_section_map::const_iterator p = | |
4148 | this->aarch64_input_section_map_.find(sid); | |
4149 | return (p != this->aarch64_input_section_map_.end()) ? p->second : NULL; | |
4150 | } | |
4151 | ||
4152 | ||
4153 | // Make a new AArch64_input_section object. | |
4154 | ||
4155 | template<int size, bool big_endian> | |
4156 | AArch64_input_section<size, big_endian>* | |
4157 | Target_aarch64<size, big_endian>::new_aarch64_input_section( | |
4158 | Relobj* relobj, unsigned int shndx) | |
4159 | { | |
4160 | Section_id sid(relobj, shndx); | |
4161 | ||
4162 | AArch64_input_section<size, big_endian>* input_section = | |
4163 | new AArch64_input_section<size, big_endian>(relobj, shndx); | |
4164 | input_section->init(); | |
4165 | ||
4166 | // Register new AArch64_input_section in map for look-up. | |
4167 | std::pair<typename AArch64_input_section_map::iterator,bool> ins = | |
4168 | this->aarch64_input_section_map_.insert( | |
4169 | std::make_pair(sid, input_section)); | |
4170 | ||
4171 | // Make sure that it we have not created another AArch64_input_section | |
4172 | // for this input section already. | |
4173 | gold_assert(ins.second); | |
4174 | ||
4175 | return input_section; | |
4176 | } | |
4177 | ||
4178 | ||
4179 | // Relaxation hook. This is where we do stub generation. | |
4180 | ||
4181 | template<int size, bool big_endian> | |
4182 | bool | |
4183 | Target_aarch64<size, big_endian>::do_relax( | |
4184 | int pass, | |
4185 | const Input_objects* input_objects, | |
4186 | Symbol_table* symtab, | |
4187 | Layout* layout , | |
4188 | const Task* task) | |
4189 | { | |
4190 | gold_assert(!parameters->options().relocatable()); | |
4191 | if (pass == 1) | |
4192 | { | |
4193 | section_size_type stub_group_size = | |
4194 | parameters->options().stub_group_size(); | |
4195 | if (stub_group_size == 1) | |
4196 | { | |
4197 | // Leave room for 4096 4-byte stub entries. If we exceed that, then we | |
4198 | // will fail to link. The user will have to relink with an explicit | |
4199 | // group size option. | |
4200 | stub_group_size = The_reloc_stub::MAX_BRANCH_OFFSET - 4096 * 4; | |
4201 | } | |
4202 | group_sections(layout, stub_group_size, true, task); | |
4203 | } | |
4204 | else | |
4205 | { | |
4206 | // If this is not the first pass, addresses and file offsets have | |
4207 | // been reset at this point, set them here. | |
4208 | for (Stub_table_iterator sp = this->stub_tables_.begin(); | |
4209 | sp != this->stub_tables_.end(); ++sp) | |
4210 | { | |
4211 | The_stub_table* stt = *sp; | |
4212 | The_aarch64_input_section* owner = stt->owner(); | |
4213 | off_t off = align_address(owner->original_size(), | |
4214 | stt->addralign()); | |
4215 | stt->set_address_and_file_offset(owner->address() + off, | |
4216 | owner->offset() + off); | |
4217 | } | |
4218 | } | |
4219 | ||
4220 | // Scan relocs for relocation stubs | |
4221 | for (Input_objects::Relobj_iterator op = input_objects->relobj_begin(); | |
4222 | op != input_objects->relobj_end(); | |
4223 | ++op) | |
4224 | { | |
4225 | The_aarch64_relobj* aarch64_relobj = | |
4226 | static_cast<The_aarch64_relobj*>(*op); | |
4227 | // Lock the object so we can read from it. This is only called | |
4228 | // single-threaded from Layout::finalize, so it is OK to lock. | |
4229 | Task_lock_obj<Object> tl(task, aarch64_relobj); | |
4230 | aarch64_relobj->scan_sections_for_stubs(this, symtab, layout); | |
4231 | } | |
4232 | ||
4233 | bool any_stub_table_changed = false; | |
4234 | for (Stub_table_iterator siter = this->stub_tables_.begin(); | |
4235 | siter != this->stub_tables_.end() && !any_stub_table_changed; ++siter) | |
4236 | { | |
4237 | The_stub_table* stub_table = *siter; | |
4238 | if (stub_table->update_data_size_changed_p()) | |
4239 | { | |
4240 | The_aarch64_input_section* owner = stub_table->owner(); | |
4241 | uint64_t address = owner->address(); | |
4242 | off_t offset = owner->offset(); | |
4243 | owner->reset_address_and_file_offset(); | |
4244 | owner->set_address_and_file_offset(address, offset); | |
4245 | ||
4246 | any_stub_table_changed = true; | |
4247 | } | |
4248 | } | |
4249 | ||
4250 | // Do not continue relaxation. | |
4251 | bool continue_relaxation = any_stub_table_changed; | |
4252 | if (!continue_relaxation) | |
4253 | for (Stub_table_iterator sp = this->stub_tables_.begin(); | |
4254 | (sp != this->stub_tables_.end()); | |
4255 | ++sp) | |
4256 | (*sp)->finalize_stubs(); | |
4257 | ||
4258 | return continue_relaxation; | |
4259 | } | |
4260 | ||
4261 | ||
4262 | // Make a new Stub_table. | |
4263 | ||
4264 | template<int size, bool big_endian> | |
4265 | Stub_table<size, big_endian>* | |
4266 | Target_aarch64<size, big_endian>::new_stub_table( | |
4267 | AArch64_input_section<size, big_endian>* owner) | |
4268 | { | |
4269 | Stub_table<size, big_endian>* stub_table = | |
4270 | new Stub_table<size, big_endian>(owner); | |
4271 | stub_table->set_address(align_address( | |
4272 | owner->address() + owner->data_size(), 8)); | |
4273 | stub_table->set_file_offset(owner->offset() + owner->data_size()); | |
4274 | stub_table->finalize_data_size(); | |
4275 | ||
4276 | this->stub_tables_.push_back(stub_table); | |
4277 | ||
4278 | return stub_table; | |
4279 | } | |
4280 | ||
4281 | ||
3a531937 JY |
4282 | template<int size, bool big_endian> |
4283 | typename elfcpp::Elf_types<size>::Elf_Addr | |
4284 | Target_aarch64<size, big_endian>::do_reloc_addend( | |
4285 | void* arg, unsigned int r_type, | |
4286 | typename elfcpp::Elf_types<size>::Elf_Addr) const | |
4287 | { | |
4288 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
4289 | uintptr_t intarg = reinterpret_cast<uintptr_t>(arg); | |
4290 | gold_assert(intarg < this->tlsdesc_reloc_info_.size()); | |
4291 | const Tlsdesc_info& ti(this->tlsdesc_reloc_info_[intarg]); | |
4292 | const Symbol_value<size>* psymval = ti.object->local_symbol(ti.r_sym); | |
4293 | gold_assert(psymval->is_tls_symbol()); | |
4294 | // The value of a TLS symbol is the offset in the TLS segment. | |
4295 | return psymval->value(ti.object, 0); | |
4296 | } | |
9363c7c3 | 4297 | |
053a4d68 JY |
4298 | // Return the number of entries in the PLT. |
4299 | ||
4300 | template<int size, bool big_endian> | |
4301 | unsigned int | |
4302 | Target_aarch64<size, big_endian>::plt_entry_count() const | |
4303 | { | |
4304 | if (this->plt_ == NULL) | |
4305 | return 0; | |
4306 | return this->plt_->entry_count(); | |
4307 | } | |
4308 | ||
4309 | // Return the offset of the first non-reserved PLT entry. | |
4310 | ||
4311 | template<int size, bool big_endian> | |
4312 | unsigned int | |
4313 | Target_aarch64<size, big_endian>::first_plt_entry_offset() const | |
4314 | { | |
4315 | return this->plt_->first_plt_entry_offset(); | |
4316 | } | |
4317 | ||
4318 | // Return the size of each PLT entry. | |
4319 | ||
4320 | template<int size, bool big_endian> | |
4321 | unsigned int | |
4322 | Target_aarch64<size, big_endian>::plt_entry_size() const | |
4323 | { | |
4324 | return this->plt_->get_plt_entry_size(); | |
4325 | } | |
4326 | ||
3a531937 | 4327 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. |
053a4d68 JY |
4328 | |
4329 | template<int size, bool big_endian> | |
3a531937 JY |
4330 | void |
4331 | Target_aarch64<size, big_endian>::define_tls_base_symbol( | |
4332 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 4333 | { |
3a531937 JY |
4334 | if (this->tls_base_symbol_defined_) |
4335 | return; | |
4336 | ||
4337 | Output_segment* tls_segment = layout->tls_segment(); | |
4338 | if (tls_segment != NULL) | |
4339 | { | |
4340 | bool is_exec = parameters->options().output_is_executable(); | |
4341 | symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL, | |
4342 | Symbol_table::PREDEFINED, | |
4343 | tls_segment, 0, 0, | |
4344 | elfcpp::STT_TLS, | |
4345 | elfcpp::STB_LOCAL, | |
4346 | elfcpp::STV_HIDDEN, 0, | |
4347 | (is_exec | |
4348 | ? Symbol::SEGMENT_END | |
4349 | : Symbol::SEGMENT_START), | |
4350 | true); | |
4351 | } | |
4352 | this->tls_base_symbol_defined_ = true; | |
053a4d68 JY |
4353 | } |
4354 | ||
3a531937 | 4355 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. |
053a4d68 JY |
4356 | |
4357 | template<int size, bool big_endian> | |
3a531937 JY |
4358 | void |
4359 | Target_aarch64<size, big_endian>::reserve_tlsdesc_entries( | |
4360 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 4361 | { |
3a531937 JY |
4362 | if (this->plt_ == NULL) |
4363 | this->make_plt_section(symtab, layout); | |
4364 | ||
4365 | if (!this->plt_->has_tlsdesc_entry()) | |
053a4d68 | 4366 | { |
3a531937 JY |
4367 | // Allocate the TLSDESC_GOT entry. |
4368 | Output_data_got_aarch64<size, big_endian>* got = | |
4369 | this->got_section(symtab, layout); | |
4370 | unsigned int got_offset = got->add_constant(0); | |
4371 | ||
4372 | // Allocate the TLSDESC_PLT entry. | |
4373 | this->plt_->reserve_tlsdesc_entry(got_offset); | |
053a4d68 | 4374 | } |
053a4d68 JY |
4375 | } |
4376 | ||
3a531937 | 4377 | // Create a GOT entry for the TLS module index. |
053a4d68 JY |
4378 | |
4379 | template<int size, bool big_endian> | |
3a531937 JY |
4380 | unsigned int |
4381 | Target_aarch64<size, big_endian>::got_mod_index_entry( | |
4382 | Symbol_table* symtab, Layout* layout, | |
4383 | Sized_relobj_file<size, big_endian>* object) | |
4384 | { | |
4385 | if (this->got_mod_index_offset_ == -1U) | |
4386 | { | |
4387 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
4388 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
4389 | Output_data_got_aarch64<size, big_endian>* got = | |
4390 | this->got_section(symtab, layout); | |
4391 | unsigned int got_offset = got->add_constant(0); | |
4392 | rela_dyn->add_local(object, 0, elfcpp::R_AARCH64_TLS_DTPMOD64, got, | |
4393 | got_offset, 0); | |
4394 | got->add_constant(0); | |
4395 | this->got_mod_index_offset_ = got_offset; | |
4396 | } | |
4397 | return this->got_mod_index_offset_; | |
4398 | } | |
4399 | ||
4400 | // Optimize the TLS relocation type based on what we know about the | |
4401 | // symbol. IS_FINAL is true if the final address of this symbol is | |
4402 | // known at link time. | |
4403 | ||
4404 | template<int size, bool big_endian> | |
4405 | tls::Tls_optimization | |
4406 | Target_aarch64<size, big_endian>::optimize_tls_reloc(bool is_final, | |
4407 | int r_type) | |
4408 | { | |
4409 | // If we are generating a shared library, then we can't do anything | |
4410 | // in the linker | |
4411 | if (parameters->options().shared()) | |
4412 | return tls::TLSOPT_NONE; | |
4413 | ||
4414 | switch (r_type) | |
4415 | { | |
4416 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
4417 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
4418 | case elfcpp::R_AARCH64_TLSDESC_LD_PREL19: | |
4419 | case elfcpp::R_AARCH64_TLSDESC_ADR_PREL21: | |
4420 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
4421 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
4422 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
4423 | case elfcpp::R_AARCH64_TLSDESC_OFF_G1: | |
4424 | case elfcpp::R_AARCH64_TLSDESC_OFF_G0_NC: | |
4425 | case elfcpp::R_AARCH64_TLSDESC_LDR: | |
4426 | case elfcpp::R_AARCH64_TLSDESC_ADD: | |
4427 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
4428 | // These are General-Dynamic which permits fully general TLS | |
4429 | // access. Since we know that we are generating an executable, | |
4430 | // we can convert this to Initial-Exec. If we also know that | |
4431 | // this is a local symbol, we can further switch to Local-Exec. | |
4432 | if (is_final) | |
4433 | return tls::TLSOPT_TO_LE; | |
4434 | return tls::TLSOPT_TO_IE; | |
4435 | ||
4436 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
4437 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
4438 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
4439 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
4440 | case elfcpp::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
4441 | // These are Initial-Exec relocs which get the thread offset | |
4442 | // from the GOT. If we know that we are linking against the | |
4443 | // local symbol, we can switch to Local-Exec, which links the | |
4444 | // thread offset into the instruction. | |
4445 | if (is_final) | |
4446 | return tls::TLSOPT_TO_LE; | |
4447 | return tls::TLSOPT_NONE; | |
4448 | ||
4449 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4450 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4451 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4452 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4453 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4454 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4455 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
4456 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
4457 | // When we already have Local-Exec, there is nothing further we | |
4458 | // can do. | |
4459 | return tls::TLSOPT_NONE; | |
4460 | ||
4461 | default: | |
4462 | gold_unreachable(); | |
4463 | } | |
4464 | } | |
4465 | ||
4466 | // Returns true if this relocation type could be that of a function pointer. | |
4467 | ||
4468 | template<int size, bool big_endian> | |
4469 | inline bool | |
4470 | Target_aarch64<size, big_endian>::Scan::possible_function_pointer_reloc( | |
4471 | unsigned int r_type) | |
4472 | { | |
4473 | switch (r_type) | |
4474 | { | |
4475 | case elfcpp::R_AARCH64_ABS64: | |
4476 | //TODO | |
4477 | { | |
4478 | return true; | |
4479 | } | |
4480 | } | |
4481 | return false; | |
4482 | } | |
4483 | ||
4484 | // For safe ICF, scan a relocation for a local symbol to check if it | |
4485 | // corresponds to a function pointer being taken. In that case mark | |
4486 | // the function whose pointer was taken as not foldable. | |
4487 | ||
4488 | template<int size, bool big_endian> | |
4489 | inline bool | |
4490 | Target_aarch64<size, big_endian>::Scan::local_reloc_may_be_function_pointer( | |
4491 | Symbol_table* , | |
053a4d68 JY |
4492 | Layout* , |
4493 | Target_aarch64<size, big_endian>* , | |
4494 | Sized_relobj_file<size, big_endian>* , | |
4495 | unsigned int , | |
4496 | Output_section* , | |
4497 | const elfcpp::Rela<size, big_endian>& , | |
4498 | unsigned int r_type, | |
4499 | const elfcpp::Sym<size, big_endian>&) | |
4500 | { | |
4501 | // When building a shared library, do not fold any local symbols as it is | |
4502 | // not possible to distinguish pointer taken versus a call by looking at | |
4503 | // the relocation types. | |
4504 | return (parameters->options().shared() | |
9363c7c3 | 4505 | || possible_function_pointer_reloc(r_type)); |
053a4d68 JY |
4506 | } |
4507 | ||
4508 | // For safe ICF, scan a relocation for a global symbol to check if it | |
4509 | // corresponds to a function pointer being taken. In that case mark | |
4510 | // the function whose pointer was taken as not foldable. | |
4511 | ||
4512 | template<int size, bool big_endian> | |
4513 | inline bool | |
4514 | Target_aarch64<size, big_endian>::Scan::global_reloc_may_be_function_pointer( | |
4515 | Symbol_table* , | |
4516 | Layout* , | |
4517 | Target_aarch64<size, big_endian>* , | |
4518 | Sized_relobj_file<size, big_endian>* , | |
4519 | unsigned int , | |
4520 | Output_section* , | |
4521 | const elfcpp::Rela<size, big_endian>& , | |
4522 | unsigned int r_type, | |
4523 | Symbol* gsym) | |
4524 | { | |
4525 | // When building a shared library, do not fold symbols whose visibility | |
4526 | // is hidden, internal or protected. | |
4527 | return ((parameters->options().shared() | |
9363c7c3 JY |
4528 | && (gsym->visibility() == elfcpp::STV_INTERNAL |
4529 | || gsym->visibility() == elfcpp::STV_PROTECTED | |
4530 | || gsym->visibility() == elfcpp::STV_HIDDEN)) | |
4531 | || possible_function_pointer_reloc(r_type)); | |
053a4d68 JY |
4532 | } |
4533 | ||
4534 | // Report an unsupported relocation against a local symbol. | |
4535 | ||
4536 | template<int size, bool big_endian> | |
4537 | void | |
4538 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_local( | |
4539 | Sized_relobj_file<size, big_endian>* object, | |
4540 | unsigned int r_type) | |
4541 | { | |
4542 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
4543 | object->name().c_str(), r_type); | |
4544 | } | |
4545 | ||
4546 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
4547 | // dynamic linker does not support it, issue an error. | |
4548 | ||
4549 | template<int size, bool big_endian> | |
4550 | void | |
4551 | Target_aarch64<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
9363c7c3 | 4552 | unsigned int r_type) |
053a4d68 JY |
4553 | { |
4554 | gold_assert(r_type != elfcpp::R_AARCH64_NONE); | |
4555 | ||
4556 | switch (r_type) | |
4557 | { | |
4558 | // These are the relocation types supported by glibc for AARCH64. | |
4559 | case elfcpp::R_AARCH64_NONE: | |
4560 | case elfcpp::R_AARCH64_COPY: | |
4561 | case elfcpp::R_AARCH64_GLOB_DAT: | |
4562 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
4563 | case elfcpp::R_AARCH64_RELATIVE: | |
4564 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
4565 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
4566 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
4567 | case elfcpp::R_AARCH64_TLSDESC: | |
4568 | case elfcpp::R_AARCH64_IRELATIVE: | |
4569 | case elfcpp::R_AARCH64_ABS32: | |
4570 | case elfcpp::R_AARCH64_ABS64: | |
4571 | return; | |
4572 | ||
4573 | default: | |
4574 | break; | |
4575 | } | |
4576 | ||
4577 | // This prevents us from issuing more than one error per reloc | |
4578 | // section. But we can still wind up issuing more than one | |
4579 | // error per object file. | |
4580 | if (this->issued_non_pic_error_) | |
4581 | return; | |
4582 | gold_assert(parameters->options().output_is_position_independent()); | |
4583 | object->error(_("requires unsupported dynamic reloc; " | |
9363c7c3 | 4584 | "recompile with -fPIC")); |
053a4d68 JY |
4585 | this->issued_non_pic_error_ = true; |
4586 | return; | |
4587 | } | |
4588 | ||
4589 | // Scan a relocation for a local symbol. | |
4590 | ||
4591 | template<int size, bool big_endian> | |
4592 | inline void | |
4593 | Target_aarch64<size, big_endian>::Scan::local( | |
8e33481e HS |
4594 | Symbol_table* symtab, |
4595 | Layout* layout, | |
4596 | Target_aarch64<size, big_endian>* target, | |
9363c7c3 | 4597 | Sized_relobj_file<size, big_endian>* object, |
8e33481e HS |
4598 | unsigned int data_shndx, |
4599 | Output_section* output_section, | |
4600 | const elfcpp::Rela<size, big_endian>& rela, | |
053a4d68 JY |
4601 | unsigned int r_type, |
4602 | const elfcpp::Sym<size, big_endian>& /* lsym */, | |
4603 | bool is_discarded) | |
4604 | { | |
4605 | if (is_discarded) | |
4606 | return; | |
4607 | ||
8e33481e | 4608 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
3a531937 JY |
4609 | Reloc_section; |
4610 | Output_data_got_aarch64<size, big_endian>* got = | |
4611 | target->got_section(symtab, layout); | |
4612 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
8e33481e | 4613 | |
053a4d68 JY |
4614 | switch (r_type) |
4615 | { | |
9363c7c3 JY |
4616 | case elfcpp::R_AARCH64_ABS32: |
4617 | case elfcpp::R_AARCH64_ABS16: | |
8e33481e HS |
4618 | if (parameters->options().output_is_position_independent()) |
4619 | { | |
4620 | gold_error(_("%s: unsupported reloc %u in pos independent link."), | |
4621 | object->name().c_str(), r_type); | |
4622 | } | |
4623 | break; | |
4624 | ||
4625 | case elfcpp::R_AARCH64_ABS64: | |
9363c7c3 JY |
4626 | // If building a shared library or pie, we need to mark this as a dynmic |
4627 | // reloction, so that the dynamic loader can relocate it. | |
9363c7c3 JY |
4628 | if (parameters->options().output_is_position_independent()) |
4629 | { | |
8e33481e | 4630 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
8e33481e HS |
4631 | rela_dyn->add_local_relative(object, r_sym, |
4632 | elfcpp::R_AARCH64_RELATIVE, | |
4633 | output_section, | |
4634 | data_shndx, | |
4635 | rela.get_r_offset(), | |
4636 | rela.get_r_addend(), | |
4637 | false /* is ifunc */); | |
9363c7c3 JY |
4638 | } |
4639 | break; | |
4640 | ||
8e33481e HS |
4641 | case elfcpp::R_AARCH64_PREL64: |
4642 | case elfcpp::R_AARCH64_PREL32: | |
4643 | case elfcpp::R_AARCH64_PREL16: | |
4644 | break; | |
4645 | ||
3a531937 JY |
4646 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
4647 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
4648 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
4649 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
4650 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
4651 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
4652 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
4653 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
4654 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 4655 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
3a531937 | 4656 | break; |
053a4d68 | 4657 | |
8e33481e HS |
4658 | // Control flow, pc-relative. We don't need to do anything for a relative |
4659 | // addressing relocation against a local symbol if it does not reference | |
4660 | // the GOT. | |
4661 | case elfcpp::R_AARCH64_TSTBR14: | |
4662 | case elfcpp::R_AARCH64_CONDBR19: | |
4663 | case elfcpp::R_AARCH64_JUMP26: | |
4664 | case elfcpp::R_AARCH64_CALL26: | |
4665 | break; | |
4666 | ||
4667 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
4668 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
4669 | { | |
3a531937 JY |
4670 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: |
4671 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
4672 | if (tlsopt == tls::TLSOPT_TO_LE) | |
4673 | break; | |
4674 | ||
8e33481e HS |
4675 | layout->set_has_static_tls(); |
4676 | // Create a GOT entry for the tp-relative offset. | |
8e33481e HS |
4677 | if (!parameters->doing_static_link()) |
4678 | { | |
4679 | got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET, | |
4680 | target->rela_dyn_section(layout), | |
4681 | elfcpp::R_AARCH64_TLS_TPREL64); | |
4682 | } | |
4683 | else if (!object->local_has_got_offset(r_sym, | |
4684 | GOT_TYPE_TLS_OFFSET)) | |
4685 | { | |
4686 | got->add_local(object, r_sym, GOT_TYPE_TLS_OFFSET); | |
4687 | unsigned int got_offset = | |
4688 | object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); | |
4689 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
4690 | gold_assert(addend == 0); | |
4691 | got->add_static_reloc(got_offset, elfcpp::R_AARCH64_TLS_TPREL64, | |
4692 | object, r_sym); | |
4693 | } | |
4694 | } | |
4695 | break; | |
4696 | ||
3a531937 JY |
4697 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
4698 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
4699 | { | |
4700 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
4701 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
4702 | if (tlsopt == tls::TLSOPT_TO_LE) | |
4703 | { | |
4704 | layout->set_has_static_tls(); | |
4705 | break; | |
4706 | } | |
4707 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
4708 | ||
4709 | got->add_local_pair_with_rel(object,r_sym, data_shndx, | |
4710 | GOT_TYPE_TLS_PAIR, | |
4711 | target->rela_dyn_section(layout), | |
4712 | elfcpp::R_AARCH64_TLS_DTPMOD64); | |
4713 | } | |
4714 | break; | |
4715 | ||
8e33481e HS |
4716 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
4717 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
4718 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
4719 | { | |
4720 | layout->set_has_static_tls(); | |
4721 | bool output_is_shared = parameters->options().shared(); | |
4722 | if (output_is_shared) | |
3a531937 | 4723 | gold_error(_("%s: unsupported TLSLE reloc %u in shared code."), |
8e33481e HS |
4724 | object->name().c_str(), r_type); |
4725 | } | |
9363c7c3 JY |
4726 | break; |
4727 | ||
3a531937 JY |
4728 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
4729 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
4730 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
4731 | { | |
4732 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
4733 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
4734 | target->define_tls_base_symbol(symtab, layout); | |
4735 | if (tlsopt == tls::TLSOPT_NONE) | |
4736 | { | |
4737 | // Create reserved PLT and GOT entries for the resolver. | |
4738 | target->reserve_tlsdesc_entries(symtab, layout); | |
4739 | ||
4740 | // Generate a double GOT entry with an R_AARCH64_TLSDESC reloc. | |
4741 | // The R_AARCH64_TLSDESC reloc is resolved lazily, so the GOT | |
4742 | // entry needs to be in an area in .got.plt, not .got. Call | |
4743 | // got_section to make sure the section has been created. | |
4744 | target->got_section(symtab, layout); | |
4745 | Output_data_got<size, big_endian>* got = | |
4746 | target->got_tlsdesc_section(); | |
4747 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
4748 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC)) | |
4749 | { | |
4750 | unsigned int got_offset = got->add_constant(0); | |
4751 | got->add_constant(0); | |
4752 | object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC, | |
4753 | got_offset); | |
4754 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
4755 | // We store the arguments we need in a vector, and use | |
4756 | // the index into the vector as the parameter to pass | |
4757 | // to the target specific routines. | |
4758 | uintptr_t intarg = target->add_tlsdesc_info(object, r_sym); | |
4759 | void* arg = reinterpret_cast<void*>(intarg); | |
4760 | rt->add_target_specific(elfcpp::R_AARCH64_TLSDESC, arg, | |
4761 | got, got_offset, 0); | |
4762 | } | |
4763 | } | |
4764 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
4765 | unsupported_reloc_local(object, r_type); | |
4766 | } | |
4767 | break; | |
4768 | ||
4769 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
4770 | break; | |
4771 | ||
9363c7c3 JY |
4772 | default: |
4773 | unsupported_reloc_local(object, r_type); | |
053a4d68 JY |
4774 | } |
4775 | } | |
4776 | ||
4777 | ||
4778 | // Report an unsupported relocation against a global symbol. | |
4779 | ||
4780 | template<int size, bool big_endian> | |
4781 | void | |
4782 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_global( | |
4783 | Sized_relobj_file<size, big_endian>* object, | |
4784 | unsigned int r_type, | |
4785 | Symbol* gsym) | |
4786 | { | |
4787 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
4788 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
4789 | } | |
4790 | ||
4791 | template<int size, bool big_endian> | |
4792 | inline void | |
4793 | Target_aarch64<size, big_endian>::Scan::global( | |
9363c7c3 JY |
4794 | Symbol_table* symtab, |
4795 | Layout* layout, | |
4796 | Target_aarch64<size, big_endian>* target, | |
8e33481e HS |
4797 | Sized_relobj_file<size, big_endian> * object, |
4798 | unsigned int data_shndx, | |
4799 | Output_section* output_section, | |
4800 | const elfcpp::Rela<size, big_endian>& rela, | |
9363c7c3 JY |
4801 | unsigned int r_type, |
4802 | Symbol* gsym) | |
053a4d68 | 4803 | { |
8e33481e HS |
4804 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
4805 | Reloc_section; | |
3a531937 JY |
4806 | const AArch64_reloc_property* arp = |
4807 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
4808 | gold_assert(arp != NULL); | |
4809 | ||
9363c7c3 JY |
4810 | switch (r_type) |
4811 | { | |
8e33481e HS |
4812 | case elfcpp::R_AARCH64_ABS16: |
4813 | case elfcpp::R_AARCH64_ABS32: | |
9363c7c3 | 4814 | case elfcpp::R_AARCH64_ABS64: |
8e33481e HS |
4815 | { |
4816 | // Make a PLT entry if necessary. | |
4817 | if (gsym->needs_plt_entry()) | |
4818 | { | |
4819 | target->make_plt_entry(symtab, layout, gsym); | |
4820 | // Since this is not a PC-relative relocation, we may be | |
4821 | // taking the address of a function. In that case we need to | |
4822 | // set the entry in the dynamic symbol table to the address of | |
4823 | // the PLT entry. | |
4824 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
4825 | gsym->set_needs_dynsym_value(); | |
4826 | } | |
4827 | // Make a dynamic relocation if necessary. | |
8e33481e HS |
4828 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) |
4829 | { | |
4830 | if (!parameters->options().output_is_position_independent() | |
4831 | && gsym->may_need_copy_reloc()) | |
4832 | { | |
3a531937 JY |
4833 | target->copy_reloc(symtab, layout, object, |
4834 | data_shndx, output_section, gsym, rela); | |
8e33481e HS |
4835 | } |
4836 | else if (r_type == elfcpp::R_AARCH64_ABS64 | |
4837 | && gsym->can_use_relative_reloc(false)) | |
4838 | { | |
4839 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
4840 | rela_dyn->add_global_relative(gsym, | |
4841 | elfcpp::R_AARCH64_RELATIVE, | |
4842 | output_section, | |
4843 | object, | |
4844 | data_shndx, | |
4845 | rela.get_r_offset(), | |
4846 | rela.get_r_addend(), | |
4847 | false); | |
4848 | } | |
4849 | else | |
4850 | { | |
4851 | check_non_pic(object, r_type); | |
4852 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>* | |
4853 | rela_dyn = target->rela_dyn_section(layout); | |
4854 | rela_dyn->add_global( | |
4855 | gsym, r_type, output_section, object, | |
4856 | data_shndx, rela.get_r_offset(),rela.get_r_addend()); | |
4857 | } | |
4858 | } | |
4859 | } | |
4860 | break; | |
4861 | ||
4862 | case elfcpp::R_AARCH64_PREL16: | |
4863 | case elfcpp::R_AARCH64_PREL32: | |
4864 | case elfcpp::R_AARCH64_PREL64: | |
9363c7c3 JY |
4865 | // This is used to fill the GOT absolute address. |
4866 | if (gsym->needs_plt_entry()) | |
4867 | { | |
4868 | target->make_plt_entry(symtab, layout, gsym); | |
4869 | } | |
4870 | break; | |
4871 | ||
3a531937 JY |
4872 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
4873 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
4874 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
4875 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
4876 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
4877 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
4878 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
4879 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
4880 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 4881 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
9363c7c3 | 4882 | { |
3a531937 JY |
4883 | if (gsym->needs_plt_entry()) |
4884 | target->make_plt_entry(symtab, layout, gsym); | |
4885 | // Make a dynamic relocation if necessary. | |
4886 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) | |
4887 | { | |
4888 | if (parameters->options().output_is_executable() | |
4889 | && gsym->may_need_copy_reloc()) | |
4890 | { | |
4891 | target->copy_reloc(symtab, layout, object, | |
4892 | data_shndx, output_section, gsym, rela); | |
4893 | } | |
4894 | } | |
9363c7c3 JY |
4895 | break; |
4896 | } | |
4897 | ||
4898 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
4899 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
4900 | { | |
4901 | // This pair of relocations is used to access a specific GOT entry. | |
4902 | // Note a GOT entry is an *address* to a symbol. | |
4903 | // The symbol requires a GOT entry | |
4904 | Output_data_got_aarch64<size, big_endian>* got = | |
4905 | target->got_section(symtab, layout); | |
4906 | if (gsym->final_value_is_known()) | |
4907 | { | |
4908 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
4909 | } | |
4910 | else | |
4911 | { | |
4912 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
4913 | if (gsym->is_from_dynobj() | |
4914 | || gsym->is_undefined() | |
4915 | || gsym->is_preemptible() | |
4916 | || (gsym->visibility() == elfcpp::STV_PROTECTED | |
4917 | && parameters->options().shared())) | |
4918 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, | |
4919 | rela_dyn, elfcpp::R_AARCH64_GLOB_DAT); | |
4920 | else | |
4921 | { | |
3a531937 JY |
4922 | if (got->add_global(gsym, GOT_TYPE_STANDARD)) |
4923 | { | |
4924 | rela_dyn->add_global_relative( | |
4925 | gsym, elfcpp::R_AARCH64_RELATIVE, | |
4926 | got, | |
4927 | gsym->got_offset(GOT_TYPE_STANDARD), | |
4928 | 0, | |
4929 | false); | |
4930 | } | |
9363c7c3 JY |
4931 | } |
4932 | } | |
4933 | break; | |
4934 | } | |
4935 | ||
8e33481e HS |
4936 | case elfcpp::R_AARCH64_TSTBR14: |
4937 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
4938 | case elfcpp::R_AARCH64_JUMP26: |
4939 | case elfcpp::R_AARCH64_CALL26: | |
4940 | { | |
4941 | if (gsym->final_value_is_known()) | |
4942 | break; | |
4943 | ||
4944 | if (gsym->is_defined() && | |
4945 | !gsym->is_from_dynobj() && | |
4946 | !gsym->is_preemptible()) | |
4947 | break; | |
4948 | ||
4949 | // Make plt entry for function call. | |
9363c7c3 JY |
4950 | target->make_plt_entry(symtab, layout, gsym); |
4951 | break; | |
4952 | } | |
4953 | ||
3a531937 JY |
4954 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
4955 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // General dynamic | |
4956 | { | |
4957 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
4958 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
4959 | if (tlsopt == tls::TLSOPT_TO_LE) | |
4960 | { | |
4961 | layout->set_has_static_tls(); | |
4962 | break; | |
4963 | } | |
4964 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
4965 | ||
4966 | // General dynamic. | |
4967 | Output_data_got_aarch64<size, big_endian>* got = | |
4968 | target->got_section(symtab, layout); | |
4969 | // Create 2 consecutive entries for module index and offset. | |
4970 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, | |
4971 | target->rela_dyn_section(layout), | |
4972 | elfcpp::R_AARCH64_TLS_DTPMOD64, | |
4973 | elfcpp::R_AARCH64_TLS_DTPREL64); | |
4974 | } | |
4975 | break; | |
4976 | ||
8e33481e | 4977 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 4978 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial executable |
8e33481e | 4979 | { |
3a531937 JY |
4980 | tls::Tls_optimization tlsopt =Target_aarch64<size, big_endian>:: |
4981 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
4982 | if (tlsopt == tls::TLSOPT_TO_LE) | |
4983 | break; | |
4984 | ||
8e33481e HS |
4985 | layout->set_has_static_tls(); |
4986 | // Create a GOT entry for the tp-relative offset. | |
4987 | Output_data_got_aarch64<size, big_endian>* got | |
4988 | = target->got_section(symtab, layout); | |
4989 | if (!parameters->doing_static_link()) | |
4990 | { | |
4991 | got->add_global_with_rel( | |
4992 | gsym, GOT_TYPE_TLS_OFFSET, | |
4993 | target->rela_dyn_section(layout), | |
4994 | elfcpp::R_AARCH64_TLS_TPREL64); | |
4995 | } | |
4996 | if (!gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) | |
4997 | { | |
4998 | got->add_global(gsym, GOT_TYPE_TLS_OFFSET); | |
4999 | unsigned int got_offset = | |
5000 | gsym->got_offset(GOT_TYPE_TLS_OFFSET); | |
5001 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
5002 | gold_assert(addend == 0); | |
5003 | got->add_static_reloc(got_offset, | |
5004 | elfcpp::R_AARCH64_TLS_TPREL64, gsym); | |
5005 | } | |
5006 | } | |
5007 | break; | |
5008 | ||
5009 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
5010 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3a531937 | 5011 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: // Local executable |
8e33481e HS |
5012 | layout->set_has_static_tls(); |
5013 | if (parameters->options().shared()) | |
5014 | gold_error(_("%s: unsupported TLSLE reloc type %u in shared objects."), | |
5015 | object->name().c_str(), r_type); | |
5016 | break; | |
5017 | ||
3a531937 JY |
5018 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
5019 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
5020 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: // TLS descriptor | |
5021 | { | |
5022 | target->define_tls_base_symbol(symtab, layout); | |
5023 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
5024 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
5025 | if (tlsopt == tls::TLSOPT_NONE) | |
5026 | { | |
5027 | // Create reserved PLT and GOT entries for the resolver. | |
5028 | target->reserve_tlsdesc_entries(symtab, layout); | |
5029 | ||
5030 | // Create a double GOT entry with an R_AARCH64_TLSDESC | |
5031 | // relocation. The R_AARCH64_TLSDESC is resolved lazily, so the GOT | |
5032 | // entry needs to be in an area in .got.plt, not .got. Call | |
5033 | // got_section to make sure the section has been created. | |
5034 | target->got_section(symtab, layout); | |
5035 | Output_data_got<size, big_endian>* got = | |
5036 | target->got_tlsdesc_section(); | |
5037 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
5038 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt, | |
5039 | elfcpp::R_AARCH64_TLSDESC, 0); | |
5040 | } | |
5041 | else if (tlsopt == tls::TLSOPT_TO_IE) | |
5042 | { | |
5043 | // Create a GOT entry for the tp-relative offset. | |
5044 | Output_data_got<size, big_endian>* got | |
5045 | = target->got_section(symtab, layout); | |
5046 | got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, | |
5047 | target->rela_dyn_section(layout), | |
5048 | elfcpp::R_AARCH64_TLS_TPREL64); | |
5049 | } | |
5050 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
5051 | unsupported_reloc_global(object, r_type, gsym); | |
5052 | } | |
5053 | break; | |
5054 | ||
5055 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
5056 | break; | |
5057 | ||
9363c7c3 | 5058 | default: |
8e33481e | 5059 | gold_error(_("%s: unsupported reloc type in global scan"), |
3a531937 JY |
5060 | aarch64_reloc_property_table-> |
5061 | reloc_name_in_error_message(r_type).c_str()); | |
9363c7c3 | 5062 | } |
053a4d68 | 5063 | return; |
9363c7c3 JY |
5064 | } // End of Scan::global |
5065 | ||
3a531937 | 5066 | |
9363c7c3 JY |
5067 | // Create the PLT section. |
5068 | template<int size, bool big_endian> | |
5069 | void | |
5070 | Target_aarch64<size, big_endian>::make_plt_section( | |
5071 | Symbol_table* symtab, Layout* layout) | |
5072 | { | |
5073 | if (this->plt_ == NULL) | |
5074 | { | |
5075 | // Create the GOT section first. | |
5076 | this->got_section(symtab, layout); | |
5077 | ||
3a531937 JY |
5078 | this->plt_ = this->make_data_plt(layout, this->got_, this->got_plt_, |
5079 | this->got_irelative_); | |
9363c7c3 JY |
5080 | |
5081 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
5082 | (elfcpp::SHF_ALLOC | |
5083 | | elfcpp::SHF_EXECINSTR), | |
5084 | this->plt_, ORDER_PLT, false); | |
5085 | ||
5086 | // Make the sh_info field of .rela.plt point to .plt. | |
5087 | Output_section* rela_plt_os = this->plt_->rela_plt()->output_section(); | |
5088 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
5089 | } | |
5090 | } | |
5091 | ||
3a531937 JY |
5092 | // Return the section for TLSDESC relocations. |
5093 | ||
5094 | template<int size, bool big_endian> | |
5095 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
5096 | Target_aarch64<size, big_endian>::rela_tlsdesc_section(Layout* layout) const | |
5097 | { | |
5098 | return this->plt_section()->rela_tlsdesc(layout); | |
5099 | } | |
5100 | ||
9363c7c3 JY |
5101 | // Create a PLT entry for a global symbol. |
5102 | ||
5103 | template<int size, bool big_endian> | |
5104 | void | |
5105 | Target_aarch64<size, big_endian>::make_plt_entry( | |
5106 | Symbol_table* symtab, | |
5107 | Layout* layout, | |
5108 | Symbol* gsym) | |
5109 | { | |
5110 | if (gsym->has_plt_offset()) | |
5111 | return; | |
5112 | ||
5113 | if (this->plt_ == NULL) | |
5114 | this->make_plt_section(symtab, layout); | |
5115 | ||
5116 | this->plt_->add_entry(gsym); | |
053a4d68 JY |
5117 | } |
5118 | ||
5119 | template<int size, bool big_endian> | |
5120 | void | |
5121 | Target_aarch64<size, big_endian>::gc_process_relocs( | |
5122 | Symbol_table* symtab, | |
5123 | Layout* layout, | |
5124 | Sized_relobj_file<size, big_endian>* object, | |
5125 | unsigned int data_shndx, | |
5126 | unsigned int sh_type, | |
5127 | const unsigned char* prelocs, | |
5128 | size_t reloc_count, | |
5129 | Output_section* output_section, | |
5130 | bool needs_special_offset_handling, | |
5131 | size_t local_symbol_count, | |
5132 | const unsigned char* plocal_symbols) | |
5133 | { | |
5134 | if (sh_type == elfcpp::SHT_REL) | |
5135 | { | |
5136 | return; | |
5137 | } | |
5138 | ||
9363c7c3 JY |
5139 | gold::gc_process_relocs< |
5140 | size, big_endian, | |
5141 | Target_aarch64<size, big_endian>, | |
5142 | elfcpp::SHT_RELA, | |
5143 | typename Target_aarch64<size, big_endian>::Scan, | |
5144 | typename Target_aarch64<size, big_endian>::Relocatable_size_for_reloc>( | |
053a4d68 JY |
5145 | symtab, |
5146 | layout, | |
5147 | this, | |
5148 | object, | |
5149 | data_shndx, | |
5150 | prelocs, | |
5151 | reloc_count, | |
5152 | output_section, | |
5153 | needs_special_offset_handling, | |
5154 | local_symbol_count, | |
5155 | plocal_symbols); | |
5156 | } | |
5157 | ||
5158 | // Scan relocations for a section. | |
5159 | ||
5160 | template<int size, bool big_endian> | |
5161 | void | |
5162 | Target_aarch64<size, big_endian>::scan_relocs( | |
5163 | Symbol_table* symtab, | |
5164 | Layout* layout, | |
5165 | Sized_relobj_file<size, big_endian>* object, | |
5166 | unsigned int data_shndx, | |
5167 | unsigned int sh_type, | |
5168 | const unsigned char* prelocs, | |
5169 | size_t reloc_count, | |
5170 | Output_section* output_section, | |
5171 | bool needs_special_offset_handling, | |
5172 | size_t local_symbol_count, | |
5173 | const unsigned char* plocal_symbols) | |
5174 | { | |
5175 | if (sh_type == elfcpp::SHT_REL) | |
5176 | { | |
5177 | gold_error(_("%s: unsupported REL reloc section"), | |
5178 | object->name().c_str()); | |
5179 | return; | |
5180 | } | |
9363c7c3 | 5181 | gold::scan_relocs<size, big_endian, Target_aarch64, elfcpp::SHT_RELA, Scan>( |
053a4d68 JY |
5182 | symtab, |
5183 | layout, | |
5184 | this, | |
5185 | object, | |
5186 | data_shndx, | |
5187 | prelocs, | |
5188 | reloc_count, | |
5189 | output_section, | |
5190 | needs_special_offset_handling, | |
5191 | local_symbol_count, | |
5192 | plocal_symbols); | |
5193 | } | |
5194 | ||
3a531937 JY |
5195 | // Return the value to use for a dynamic which requires special |
5196 | // treatment. This is how we support equality comparisons of function | |
5197 | // pointers across shared library boundaries, as described in the | |
5198 | // processor specific ABI supplement. | |
5199 | ||
83a01957 | 5200 | template<int size, bool big_endian> |
3a531937 | 5201 | uint64_t |
83a01957 | 5202 | Target_aarch64<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
3a531937 JY |
5203 | { |
5204 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
5205 | return this->plt_address_for_global(gsym); | |
5206 | } | |
5207 | ||
83a01957 | 5208 | |
053a4d68 JY |
5209 | // Finalize the sections. |
5210 | ||
5211 | template<int size, bool big_endian> | |
5212 | void | |
5213 | Target_aarch64<size, big_endian>::do_finalize_sections( | |
9363c7c3 | 5214 | Layout* layout, |
053a4d68 | 5215 | const Input_objects*, |
9363c7c3 | 5216 | Symbol_table* symtab) |
053a4d68 | 5217 | { |
9363c7c3 JY |
5218 | const Reloc_section* rel_plt = (this->plt_ == NULL |
5219 | ? NULL | |
5220 | : this->plt_->rela_plt()); | |
5221 | layout->add_target_dynamic_tags(false, this->got_plt_, rel_plt, | |
5222 | this->rela_dyn_, true, false); | |
5223 | ||
3a531937 JY |
5224 | // Emit any relocs we saved in an attempt to avoid generating COPY |
5225 | // relocs. | |
5226 | if (this->copy_relocs_.any_saved_relocs()) | |
5227 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
5228 | ||
5229 | // Fill in some more dynamic tags. | |
5230 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
5231 | if (odyn != NULL) | |
5232 | { | |
5233 | if (this->plt_ != NULL | |
5234 | && this->plt_->output_section() != NULL | |
5235 | && this->plt_ ->has_tlsdesc_entry()) | |
5236 | { | |
5237 | unsigned int plt_offset = this->plt_->get_tlsdesc_plt_offset(); | |
5238 | unsigned int got_offset = this->plt_->get_tlsdesc_got_offset(); | |
5239 | this->got_->finalize_data_size(); | |
5240 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_PLT, | |
5241 | this->plt_, plt_offset); | |
5242 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_GOT, | |
5243 | this->got_, got_offset); | |
5244 | } | |
5245 | } | |
5246 | ||
9363c7c3 JY |
5247 | // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of |
5248 | // the .got.plt section. | |
5249 | Symbol* sym = this->global_offset_table_; | |
5250 | if (sym != NULL) | |
5251 | { | |
5252 | uint64_t data_size = this->got_plt_->current_data_size(); | |
5253 | symtab->get_sized_symbol<size>(sym)->set_symsize(data_size); | |
5254 | ||
5255 | // If the .got section is more than 0x8000 bytes, we add | |
5256 | // 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 | |
5257 | // bit relocations have a greater chance of working. | |
5258 | if (data_size >= 0x8000) | |
5259 | symtab->get_sized_symbol<size>(sym)->set_value( | |
5260 | symtab->get_sized_symbol<size>(sym)->value() + 0x8000); | |
5261 | } | |
5262 | ||
5263 | if (parameters->doing_static_link() | |
5264 | && (this->plt_ == NULL || !this->plt_->has_irelative_section())) | |
5265 | { | |
5266 | // If linking statically, make sure that the __rela_iplt symbols | |
5267 | // were defined if necessary, even if we didn't create a PLT. | |
5268 | static const Define_symbol_in_segment syms[] = | |
5269 | { | |
5270 | { | |
5271 | "__rela_iplt_start", // name | |
5272 | elfcpp::PT_LOAD, // segment_type | |
5273 | elfcpp::PF_W, // segment_flags_set | |
5274 | elfcpp::PF(0), // segment_flags_clear | |
5275 | 0, // value | |
5276 | 0, // size | |
5277 | elfcpp::STT_NOTYPE, // type | |
5278 | elfcpp::STB_GLOBAL, // binding | |
5279 | elfcpp::STV_HIDDEN, // visibility | |
5280 | 0, // nonvis | |
5281 | Symbol::SEGMENT_START, // offset_from_base | |
5282 | true // only_if_ref | |
5283 | }, | |
5284 | { | |
5285 | "__rela_iplt_end", // name | |
5286 | elfcpp::PT_LOAD, // segment_type | |
5287 | elfcpp::PF_W, // segment_flags_set | |
5288 | elfcpp::PF(0), // segment_flags_clear | |
5289 | 0, // value | |
5290 | 0, // size | |
5291 | elfcpp::STT_NOTYPE, // type | |
5292 | elfcpp::STB_GLOBAL, // binding | |
5293 | elfcpp::STV_HIDDEN, // visibility | |
5294 | 0, // nonvis | |
5295 | Symbol::SEGMENT_START, // offset_from_base | |
5296 | true // only_if_ref | |
5297 | } | |
5298 | }; | |
5299 | ||
5300 | symtab->define_symbols(layout, 2, syms, | |
5301 | layout->script_options()->saw_sections_clause()); | |
5302 | } | |
5303 | ||
053a4d68 JY |
5304 | return; |
5305 | } | |
5306 | ||
5307 | // Perform a relocation. | |
5308 | ||
5309 | template<int size, bool big_endian> | |
5310 | inline bool | |
5311 | Target_aarch64<size, big_endian>::Relocate::relocate( | |
9363c7c3 JY |
5312 | const Relocate_info<size, big_endian>* relinfo, |
5313 | Target_aarch64<size, big_endian>* target, | |
053a4d68 | 5314 | Output_section* , |
9363c7c3 JY |
5315 | size_t relnum, |
5316 | const elfcpp::Rela<size, big_endian>& rela, | |
5317 | unsigned int r_type, | |
5318 | const Sized_symbol<size>* gsym, | |
5319 | const Symbol_value<size>* psymval, | |
5320 | unsigned char* view, | |
5321 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
053a4d68 JY |
5322 | section_size_type /* view_size */) |
5323 | { | |
9363c7c3 JY |
5324 | if (view == NULL) |
5325 | return true; | |
5326 | ||
5327 | typedef AArch64_relocate_functions<size, big_endian> Reloc; | |
5328 | ||
5329 | const AArch64_reloc_property* reloc_property = | |
5330 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
5331 | ||
5332 | if (reloc_property == NULL) | |
5333 | { | |
5334 | std::string reloc_name = | |
5335 | aarch64_reloc_property_table->reloc_name_in_error_message(r_type); | |
5336 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5337 | _("cannot relocate %s in object file"), | |
5338 | reloc_name.c_str()); | |
5339 | return true; | |
5340 | } | |
5341 | ||
5342 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; | |
5343 | ||
5344 | // Pick the value to use for symbols defined in the PLT. | |
5345 | Symbol_value<size> symval; | |
5346 | if (gsym != NULL | |
5347 | && gsym->use_plt_offset(reloc_property->reference_flags())) | |
5348 | { | |
5349 | symval.set_output_value(target->plt_address_for_global(gsym)); | |
5350 | psymval = &symval; | |
5351 | } | |
5352 | else if (gsym == NULL && psymval->is_ifunc_symbol()) | |
5353 | { | |
5354 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5355 | if (object->local_has_plt_offset(r_sym)) | |
5356 | { | |
5357 | symval.set_output_value(target->plt_address_for_local(object, r_sym)); | |
5358 | psymval = &symval; | |
5359 | } | |
5360 | } | |
5361 | ||
5362 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
5363 | ||
5364 | // Get the GOT offset if needed. | |
5365 | // For aarch64, the GOT pointer points to the start of the GOT section. | |
5366 | bool have_got_offset = false; | |
5367 | int got_offset = 0; | |
5368 | int got_base = (target->got_ != NULL | |
5369 | ? (target->got_->current_data_size() >= 0x8000 | |
5370 | ? 0x8000 : 0) | |
5371 | : 0); | |
5372 | switch (r_type) | |
5373 | { | |
5374 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0: | |
5375 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0_NC: | |
5376 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1: | |
5377 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1_NC: | |
5378 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2: | |
5379 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2_NC: | |
5380 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G3: | |
5381 | case elfcpp::R_AARCH64_GOTREL64: | |
5382 | case elfcpp::R_AARCH64_GOTREL32: | |
5383 | case elfcpp::R_AARCH64_GOT_LD_PREL19: | |
5384 | case elfcpp::R_AARCH64_LD64_GOTOFF_LO15: | |
5385 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
5386 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
5387 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: | |
5388 | if (gsym != NULL) | |
5389 | { | |
5390 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
5391 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD) - got_base; | |
5392 | } | |
5393 | else | |
5394 | { | |
5395 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5396 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
5397 | got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD) | |
5398 | - got_base); | |
5399 | } | |
5400 | have_got_offset = true; | |
5401 | break; | |
8e33481e | 5402 | |
9363c7c3 JY |
5403 | default: |
5404 | break; | |
5405 | } | |
5406 | ||
5407 | typename Reloc::Status reloc_status = Reloc::STATUS_OKAY; | |
5408 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
5409 | switch (r_type) | |
5410 | { | |
5411 | case elfcpp::R_AARCH64_NONE: | |
5412 | break; | |
5413 | ||
5414 | case elfcpp::R_AARCH64_ABS64: | |
5415 | reloc_status = Reloc::template rela_ua<64>( | |
5416 | view, object, psymval, addend, reloc_property); | |
5417 | break; | |
5418 | ||
5419 | case elfcpp::R_AARCH64_ABS32: | |
5420 | reloc_status = Reloc::template rela_ua<32>( | |
5421 | view, object, psymval, addend, reloc_property); | |
5422 | break; | |
5423 | ||
5424 | case elfcpp::R_AARCH64_ABS16: | |
5425 | reloc_status = Reloc::template rela_ua<16>( | |
5426 | view, object, psymval, addend, reloc_property); | |
5427 | break; | |
5428 | ||
5429 | case elfcpp::R_AARCH64_PREL64: | |
5430 | reloc_status = Reloc::template pcrela_ua<64>( | |
5431 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 5432 | break; |
9363c7c3 JY |
5433 | |
5434 | case elfcpp::R_AARCH64_PREL32: | |
5435 | reloc_status = Reloc::template pcrela_ua<32>( | |
5436 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 5437 | break; |
9363c7c3 JY |
5438 | |
5439 | case elfcpp::R_AARCH64_PREL16: | |
5440 | reloc_status = Reloc::template pcrela_ua<16>( | |
5441 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 5442 | break; |
9363c7c3 JY |
5443 | |
5444 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: | |
5445 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: | |
5446 | reloc_status = Reloc::adrp(view, object, psymval, addend, address, | |
5447 | reloc_property); | |
5448 | break; | |
5449 | ||
5450 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: | |
5451 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: | |
5452 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: | |
5453 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: | |
5454 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: | |
5455 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: | |
5456 | reloc_status = Reloc::template rela_general<32>( | |
5457 | view, object, psymval, addend, reloc_property); | |
5458 | break; | |
5459 | ||
3a531937 JY |
5460 | case elfcpp::R_AARCH64_CALL26: |
5461 | if (this->skip_call_tls_get_addr_) | |
5462 | { | |
5463 | // Double check that the TLSGD insn has been optimized away. | |
5464 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
5465 | Insntype insn = elfcpp::Swap<32, big_endian>::readval( | |
5466 | reinterpret_cast<Insntype*>(view)); | |
5467 | gold_assert((insn & 0xff000000) == 0x91000000); | |
5468 | ||
5469 | reloc_status = Reloc::STATUS_OKAY; | |
5470 | this->skip_call_tls_get_addr_ = false; | |
5471 | // Return false to stop further processing this reloc. | |
5472 | return false; | |
5473 | } | |
83a01957 HS |
5474 | // Fallthrough |
5475 | case elfcpp::R_AARCH64_JUMP26: | |
5476 | if (Reloc::maybe_apply_stub(r_type, relinfo, rela, view, address, | |
5477 | gsym, psymval, object)) | |
5478 | break; | |
5479 | // Fallthrough | |
8e33481e HS |
5480 | case elfcpp::R_AARCH64_TSTBR14: |
5481 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
5482 | reloc_status = Reloc::template pcrela_general<32>( |
5483 | view, object, psymval, addend, address, reloc_property); | |
5484 | break; | |
5485 | ||
5486 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
5487 | gold_assert(have_got_offset); | |
5488 | value = target->got_->address() + got_base + got_offset; | |
5489 | reloc_status = Reloc::adrp(view, value + addend, address); | |
5490 | break; | |
5491 | ||
5492 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
5493 | gold_assert(have_got_offset); | |
5494 | value = target->got_->address() + got_base + got_offset; | |
5495 | reloc_status = Reloc::template rela_general<32>( | |
5496 | view, value, addend, reloc_property); | |
5497 | break; | |
5498 | ||
3a531937 JY |
5499 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
5500 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
8e33481e HS |
5501 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
5502 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
8e33481e HS |
5503 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
5504 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
5505 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3a531937 JY |
5506 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
5507 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
5508 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
5509 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
8e33481e HS |
5510 | reloc_status = relocate_tls(relinfo, target, relnum, rela, r_type, |
5511 | gsym, psymval, view, address); | |
5512 | break; | |
5513 | ||
3a531937 JY |
5514 | // These are dynamic relocations, which are unexpected when linking. |
5515 | case elfcpp::R_AARCH64_COPY: | |
5516 | case elfcpp::R_AARCH64_GLOB_DAT: | |
5517 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
5518 | case elfcpp::R_AARCH64_RELATIVE: | |
5519 | case elfcpp::R_AARCH64_IRELATIVE: | |
5520 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
5521 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
5522 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
5523 | case elfcpp::R_AARCH64_TLSDESC: | |
9363c7c3 | 5524 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
3a531937 | 5525 | _("unexpected reloc %u in object file"), |
9363c7c3 JY |
5526 | r_type); |
5527 | break; | |
3a531937 JY |
5528 | |
5529 | default: | |
5530 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5531 | _("unsupported reloc %s"), | |
5532 | reloc_property->name().c_str()); | |
5533 | break; | |
9363c7c3 JY |
5534 | } |
5535 | ||
5536 | // Report any errors. | |
5537 | switch (reloc_status) | |
5538 | { | |
5539 | case Reloc::STATUS_OKAY: | |
5540 | break; | |
5541 | case Reloc::STATUS_OVERFLOW: | |
5542 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5543 | _("relocation overflow in %s"), | |
5544 | reloc_property->name().c_str()); | |
5545 | break; | |
5546 | case Reloc::STATUS_BAD_RELOC: | |
5547 | gold_error_at_location( | |
5548 | relinfo, | |
5549 | relnum, | |
5550 | rela.get_r_offset(), | |
5551 | _("unexpected opcode while processing relocation %s"), | |
5552 | reloc_property->name().c_str()); | |
5553 | break; | |
5554 | default: | |
5555 | gold_unreachable(); | |
5556 | } | |
5557 | ||
053a4d68 JY |
5558 | return true; |
5559 | } | |
5560 | ||
3a531937 | 5561 | |
8e33481e HS |
5562 | template<int size, bool big_endian> |
5563 | inline | |
83a01957 | 5564 | typename AArch64_relocate_functions<size, big_endian>::Status |
8e33481e | 5565 | Target_aarch64<size, big_endian>::Relocate::relocate_tls( |
83a01957 | 5566 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
5567 | Target_aarch64<size, big_endian>* target, |
5568 | size_t relnum, | |
5569 | const elfcpp::Rela<size, big_endian>& rela, | |
5570 | unsigned int r_type, const Sized_symbol<size>* gsym, | |
5571 | const Symbol_value<size>* psymval, | |
5572 | unsigned char* view, | |
8e33481e HS |
5573 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
5574 | { | |
83a01957 | 5575 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 | 5576 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; |
8e33481e | 5577 | |
3a531937 JY |
5578 | Output_segment* tls_segment = relinfo->layout->tls_segment(); |
5579 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
5580 | const AArch64_reloc_property* reloc_property = | |
5581 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
8e33481e HS |
5582 | gold_assert(reloc_property != NULL); |
5583 | ||
3a531937 JY |
5584 | const bool is_final = (gsym == NULL |
5585 | ? !parameters->options().shared() | |
5586 | : gsym->final_value_is_known()); | |
5587 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
5588 | optimize_tls_reloc(is_final, r_type); | |
5589 | ||
83a01957 | 5590 | Sized_relobj_file<size, big_endian>* object = relinfo->object; |
3a531937 | 5591 | int tls_got_offset_type; |
8e33481e HS |
5592 | switch (r_type) |
5593 | { | |
3a531937 JY |
5594 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
5595 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // Global-dynamic | |
5596 | { | |
5597 | if (tlsopt == tls::TLSOPT_TO_LE) | |
5598 | { | |
5599 | if (tls_segment == NULL) | |
5600 | { | |
5601 | gold_assert(parameters->errors()->error_count() > 0 | |
5602 | || issue_undefined_symbol_error(gsym)); | |
5603 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5604 | } | |
5605 | return tls_gd_to_le(relinfo, target, rela, r_type, view, | |
5606 | psymval); | |
5607 | } | |
5608 | else if (tlsopt == tls::TLSOPT_NONE) | |
5609 | { | |
5610 | tls_got_offset_type = GOT_TYPE_TLS_PAIR; | |
5611 | // Firstly get the address for the got entry. | |
5612 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
5613 | if (gsym != NULL) | |
5614 | { | |
5615 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
5616 | got_entry_address = target->got_->address() + | |
5617 | gsym->got_offset(tls_got_offset_type); | |
5618 | } | |
5619 | else | |
5620 | { | |
5621 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5622 | gold_assert( | |
5623 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
5624 | got_entry_address = target->got_->address() + | |
5625 | object->local_got_offset(r_sym, tls_got_offset_type); | |
5626 | } | |
5627 | ||
5628 | // Relocate the address into adrp/ld, adrp/add pair. | |
5629 | switch (r_type) | |
5630 | { | |
5631 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
5632 | return aarch64_reloc_funcs::adrp( | |
5633 | view, got_entry_address + addend, address); | |
5634 | ||
5635 | break; | |
5636 | ||
5637 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
5638 | return aarch64_reloc_funcs::template rela_general<32>( | |
5639 | view, got_entry_address, addend, reloc_property); | |
5640 | break; | |
5641 | ||
5642 | default: | |
5643 | gold_assert(false); | |
5644 | } | |
5645 | } | |
5646 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
5647 | _("unsupported gd_to_ie relaxation on %u"), | |
5648 | r_type); | |
5649 | } | |
5650 | break; | |
5651 | ||
8e33481e | 5652 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 5653 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial-exec |
8e33481e | 5654 | { |
3a531937 JY |
5655 | if (tlsopt == tls::TLSOPT_TO_LE) |
5656 | { | |
5657 | if (tls_segment == NULL) | |
5658 | { | |
5659 | gold_assert(parameters->errors()->error_count() > 0 | |
5660 | || issue_undefined_symbol_error(gsym)); | |
5661 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5662 | } | |
5663 | return tls_ie_to_le(relinfo, target, rela, r_type, view, | |
5664 | psymval); | |
5665 | } | |
5666 | tls_got_offset_type = GOT_TYPE_TLS_OFFSET; | |
5667 | ||
5668 | // Firstly get the address for the got entry. | |
8e33481e HS |
5669 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; |
5670 | if (gsym != NULL) | |
5671 | { | |
3a531937 | 5672 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); |
8e33481e | 5673 | got_entry_address = target->got_->address() + |
3a531937 | 5674 | gsym->got_offset(tls_got_offset_type); |
8e33481e HS |
5675 | } |
5676 | else | |
5677 | { | |
5678 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5679 | gold_assert( | |
3a531937 | 5680 | object->local_has_got_offset(r_sym, tls_got_offset_type)); |
8e33481e | 5681 | got_entry_address = target->got_->address() + |
3a531937 | 5682 | object->local_got_offset(r_sym, tls_got_offset_type); |
8e33481e | 5683 | } |
3a531937 JY |
5684 | // Relocate the address into adrp/ld, adrp/add pair. |
5685 | switch (r_type) | |
8e33481e | 5686 | { |
3a531937 JY |
5687 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
5688 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
5689 | address); | |
5690 | break; | |
5691 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
5692 | return aarch64_reloc_funcs::template rela_general<32>( | |
5693 | view, got_entry_address, addend, reloc_property); | |
5694 | default: | |
5695 | gold_assert(false); | |
8e33481e | 5696 | } |
8e33481e | 5697 | } |
3a531937 | 5698 | // We shall never reach here. |
8e33481e HS |
5699 | break; |
5700 | ||
5701 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
5702 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
5703 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
5704 | { | |
8e33481e | 5705 | gold_assert(tls_segment != NULL); |
3a531937 | 5706 | AArch64_address value = psymval->value(object, 0); |
8e33481e HS |
5707 | |
5708 | if (!parameters->options().shared()) | |
5709 | { | |
3a531937 JY |
5710 | AArch64_address aligned_tcb_size = |
5711 | align_address(target->tcb_size(), | |
5712 | tls_segment->maximum_alignment()); | |
8e33481e HS |
5713 | return aarch64_reloc_funcs::template |
5714 | rela_general<32>(view, | |
5715 | value + aligned_tcb_size, | |
5716 | addend, | |
5717 | reloc_property); | |
5718 | } | |
5719 | else | |
5720 | gold_error(_("%s: unsupported reloc %u " | |
5721 | "in non-static TLSLE mode."), | |
5722 | object->name().c_str(), r_type); | |
5723 | } | |
5724 | break; | |
5725 | ||
3a531937 JY |
5726 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
5727 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
5728 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
5729 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
5730 | { | |
5731 | if (tlsopt == tls::TLSOPT_TO_LE) | |
5732 | { | |
5733 | if (tls_segment == NULL) | |
5734 | { | |
5735 | gold_assert(parameters->errors()->error_count() > 0 | |
5736 | || issue_undefined_symbol_error(gsym)); | |
5737 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5738 | } | |
5739 | return tls_desc_gd_to_le(relinfo, target, rela, r_type, | |
5740 | view, psymval); | |
5741 | } | |
5742 | else | |
5743 | { | |
5744 | tls_got_offset_type = (tlsopt == tls::TLSOPT_TO_IE | |
5745 | ? GOT_TYPE_TLS_OFFSET | |
5746 | : GOT_TYPE_TLS_DESC); | |
5747 | unsigned int got_tlsdesc_offset = 0; | |
5748 | if (r_type != elfcpp::R_AARCH64_TLSDESC_CALL | |
5749 | && tlsopt == tls::TLSOPT_NONE) | |
5750 | { | |
5751 | // We created GOT entries in the .got.tlsdesc portion of the | |
5752 | // .got.plt section, but the offset stored in the symbol is the | |
5753 | // offset within .got.tlsdesc. | |
5754 | got_tlsdesc_offset = (target->got_->data_size() | |
5755 | + target->got_plt_section()->data_size()); | |
5756 | } | |
5757 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
5758 | if (gsym != NULL) | |
5759 | { | |
5760 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
5761 | got_entry_address = target->got_->address() | |
5762 | + got_tlsdesc_offset | |
5763 | + gsym->got_offset(tls_got_offset_type); | |
5764 | } | |
5765 | else | |
5766 | { | |
5767 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5768 | gold_assert( | |
5769 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
5770 | got_entry_address = target->got_->address() + | |
5771 | got_tlsdesc_offset + | |
5772 | object->local_got_offset(r_sym, tls_got_offset_type); | |
5773 | } | |
5774 | if (tlsopt == tls::TLSOPT_TO_IE) | |
5775 | { | |
5776 | if (tls_segment == NULL) | |
5777 | { | |
5778 | gold_assert(parameters->errors()->error_count() > 0 | |
5779 | || issue_undefined_symbol_error(gsym)); | |
5780 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5781 | } | |
5782 | return tls_desc_gd_to_ie(relinfo, target, rela, r_type, | |
5783 | view, psymval, got_entry_address, | |
5784 | address); | |
5785 | } | |
5786 | ||
5787 | // Now do tlsdesc relocation. | |
5788 | switch (r_type) | |
5789 | { | |
5790 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
5791 | return aarch64_reloc_funcs::adrp(view, | |
5792 | got_entry_address + addend, | |
5793 | address); | |
5794 | break; | |
5795 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
5796 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
5797 | return aarch64_reloc_funcs::template rela_general<32>( | |
5798 | view, got_entry_address, addend, reloc_property); | |
5799 | break; | |
5800 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
5801 | return aarch64_reloc_funcs::STATUS_OKAY; | |
5802 | break; | |
5803 | default: | |
5804 | gold_unreachable(); | |
5805 | } | |
5806 | } | |
5807 | } | |
5808 | break; | |
5809 | ||
8e33481e HS |
5810 | default: |
5811 | gold_error(_("%s: unsupported TLS reloc %u."), | |
5812 | object->name().c_str(), r_type); | |
5813 | } | |
5814 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3a531937 JY |
5815 | } // End of relocate_tls. |
5816 | ||
5817 | ||
5818 | template<int size, bool big_endian> | |
5819 | inline | |
83a01957 | 5820 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 5821 | Target_aarch64<size, big_endian>::Relocate::tls_gd_to_le( |
83a01957 | 5822 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
5823 | Target_aarch64<size, big_endian>* target, |
5824 | const elfcpp::Rela<size, big_endian>& rela, | |
5825 | unsigned int r_type, | |
5826 | unsigned char* view, | |
5827 | const Symbol_value<size>* psymval) | |
5828 | { | |
83a01957 | 5829 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
5830 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; |
5831 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
5832 | ||
5833 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
5834 | Insntype insn1 = elfcpp::Swap<32, big_endian>::readval(ip); | |
5835 | Insntype insn2 = elfcpp::Swap<32, big_endian>::readval(ip + 1); | |
5836 | Insntype insn3 = elfcpp::Swap<32, big_endian>::readval(ip + 2); | |
5837 | ||
5838 | if (r_type == elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC) | |
5839 | { | |
5840 | // This is the 2nd relocs, optimization should already have been | |
5841 | // done. | |
5842 | gold_assert((insn1 & 0xfff00000) == 0x91400000); | |
5843 | return aarch64_reloc_funcs::STATUS_OKAY; | |
5844 | } | |
5845 | ||
5846 | // The original sequence is - | |
5847 | // 90000000 adrp x0, 0 <main> | |
5848 | // 91000000 add x0, x0, #0x0 | |
5849 | // 94000000 bl 0 <__tls_get_addr> | |
5850 | // optimized to sequence - | |
5851 | // d53bd040 mrs x0, tpidr_el0 | |
5852 | // 91400000 add x0, x0, #0x0, lsl #12 | |
5853 | // 91000000 add x0, x0, #0x0 | |
5854 | ||
5855 | // Unlike tls_ie_to_le, we change the 3 insns in one function call when we | |
5856 | // encounter the first relocation "R_AARCH64_TLSGD_ADR_PAGE21". Because we | |
5857 | // have to change "bl tls_get_addr", which does not have a corresponding tls | |
5858 | // relocation type. So before proceeding, we need to make sure compiler | |
5859 | // does not change the sequence. | |
5860 | if(!(insn1 == 0x90000000 // adrp x0,0 | |
5861 | && insn2 == 0x91000000 // add x0, x0, #0x0 | |
5862 | && insn3 == 0x94000000)) // bl 0 | |
5863 | { | |
5864 | // Ideally we should give up gd_to_le relaxation and do gd access. | |
5865 | // However the gd_to_le relaxation decision has been made early | |
5866 | // in the scan stage, where we did not allocate any GOT entry for | |
5867 | // this symbol. Therefore we have to exit and report error now. | |
5868 | gold_error(_("unexpected reloc insn sequence while relaxing " | |
5869 | "tls gd to le for reloc %u."), r_type); | |
5870 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5871 | } | |
5872 | ||
5873 | // Write new insns. | |
5874 | insn1 = 0xd53bd040; // mrs x0, tpidr_el0 | |
5875 | insn2 = 0x91400000; // add x0, x0, #0x0, lsl #12 | |
5876 | insn3 = 0x91000000; // add x0, x0, #0x0 | |
5877 | elfcpp::Swap<32, big_endian>::writeval(ip, insn1); | |
5878 | elfcpp::Swap<32, big_endian>::writeval(ip + 1, insn2); | |
5879 | elfcpp::Swap<32, big_endian>::writeval(ip + 2, insn3); | |
5880 | ||
5881 | // Calculate tprel value. | |
5882 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
5883 | gold_assert(tls_segment != NULL); | |
5884 | AArch64_address value = psymval->value(relinfo->object, 0); | |
5885 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
5886 | AArch64_address aligned_tcb_size = | |
5887 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
5888 | AArch64_address x = value + aligned_tcb_size; | |
5889 | ||
5890 | // After new insns are written, apply TLSLE relocs. | |
5891 | const AArch64_reloc_property* rp1 = | |
5892 | aarch64_reloc_property_table->get_reloc_property( | |
5893 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12); | |
5894 | const AArch64_reloc_property* rp2 = | |
5895 | aarch64_reloc_property_table->get_reloc_property( | |
5896 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12); | |
5897 | gold_assert(rp1 != NULL && rp2 != NULL); | |
5898 | ||
5899 | typename aarch64_reloc_funcs::Status s1 = | |
5900 | aarch64_reloc_funcs::template rela_general<32>(view + 4, | |
5901 | x, | |
5902 | addend, | |
5903 | rp1); | |
5904 | if (s1 != aarch64_reloc_funcs::STATUS_OKAY) | |
5905 | return s1; | |
5906 | ||
5907 | typename aarch64_reloc_funcs::Status s2 = | |
5908 | aarch64_reloc_funcs::template rela_general<32>(view + 8, | |
5909 | x, | |
5910 | addend, | |
5911 | rp2); | |
5912 | ||
5913 | this->skip_call_tls_get_addr_ = true; | |
5914 | return s2; | |
5915 | } // End of tls_gd_to_le | |
5916 | ||
5917 | ||
5918 | template<int size, bool big_endian> | |
5919 | inline | |
83a01957 | 5920 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 5921 | Target_aarch64<size, big_endian>::Relocate::tls_ie_to_le( |
83a01957 | 5922 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
5923 | Target_aarch64<size, big_endian>* target, |
5924 | const elfcpp::Rela<size, big_endian>& rela, | |
5925 | unsigned int r_type, | |
5926 | unsigned char* view, | |
5927 | const Symbol_value<size>* psymval) | |
5928 | { | |
5929 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
5930 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 5931 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
5932 | |
5933 | AArch64_address value = psymval->value(relinfo->object, 0); | |
5934 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
5935 | AArch64_address aligned_tcb_address = | |
5936 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
5937 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
5938 | AArch64_address x = value + addend + aligned_tcb_address; | |
5939 | // "x" is the offset to tp, we can only do this if x is within | |
5940 | // range [0, 2^32-1] | |
5941 | if (!(size == 32 || (size == 64 && (static_cast<uint64_t>(x) >> 32) == 0))) | |
5942 | { | |
5943 | gold_error(_("TLS variable referred by reloc %u is too far from TP."), | |
5944 | r_type); | |
5945 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
5946 | } | |
5947 | ||
5948 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
5949 | Insntype insn = elfcpp::Swap<32, big_endian>::readval(ip); | |
5950 | unsigned int regno; | |
5951 | Insntype newinsn; | |
5952 | if (r_type == elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21) | |
5953 | { | |
5954 | // Generate movz. | |
5955 | regno = (insn & 0x1f); | |
5956 | newinsn = (0xd2a00000 | regno) | (((x >> 16) & 0xffff) << 5); | |
5957 | } | |
5958 | else if (r_type == elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC) | |
5959 | { | |
5960 | // Generate movk. | |
5961 | regno = (insn & 0x1f); | |
5962 | gold_assert(regno == ((insn >> 5) & 0x1f)); | |
5963 | newinsn = (0xf2800000 | regno) | ((x & 0xffff) << 5); | |
5964 | } | |
5965 | else | |
5966 | gold_assert(false); | |
5967 | ||
5968 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
5969 | return aarch64_reloc_funcs::STATUS_OKAY; | |
5970 | } // End of tls_ie_to_le | |
5971 | ||
5972 | ||
5973 | template<int size, bool big_endian> | |
5974 | inline | |
83a01957 | 5975 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 5976 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_le( |
83a01957 | 5977 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
5978 | Target_aarch64<size, big_endian>* target, |
5979 | const elfcpp::Rela<size, big_endian>& rela, | |
5980 | unsigned int r_type, | |
5981 | unsigned char* view, | |
5982 | const Symbol_value<size>* psymval) | |
5983 | { | |
5984 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
5985 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 5986 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
5987 | |
5988 | // TLSDESC-GD sequence is like: | |
5989 | // adrp x0, :tlsdesc:v1 | |
5990 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
5991 | // add x0, x0, :tlsdesc_lo12:v1 | |
5992 | // .tlsdesccall v1 | |
5993 | // blr x1 | |
5994 | // After desc_gd_to_le optimization, the sequence will be like: | |
5995 | // movz x0, #0x0, lsl #16 | |
5996 | // movk x0, #0x10 | |
5997 | // nop | |
5998 | // nop | |
5999 | ||
6000 | // Calculate tprel value. | |
6001 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
6002 | gold_assert(tls_segment != NULL); | |
6003 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
6004 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
6005 | AArch64_address value = psymval->value(relinfo->object, addend); | |
6006 | AArch64_address aligned_tcb_size = | |
6007 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
6008 | AArch64_address x = value + aligned_tcb_size; | |
6009 | // x is the offset to tp, we can only do this if x is within range | |
6010 | // [0, 2^32-1]. If x is out of range, fail and exit. | |
6011 | if (size == 64 && (static_cast<uint64_t>(x) >> 32) != 0) | |
6012 | { | |
6013 | gold_error(_("TLS variable referred by reloc %u is too far from TP. " | |
6014 | "We Can't do gd_to_le relaxation.\n"), r_type); | |
6015 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
6016 | } | |
6017 | Insntype newinsn; | |
6018 | switch (r_type) | |
6019 | { | |
6020 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
6021 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
6022 | // Change to nop | |
6023 | newinsn = 0xd503201f; | |
6024 | break; | |
6025 | ||
6026 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
6027 | // Change to movz. | |
6028 | newinsn = 0xd2a00000 | (((x >> 16) & 0xffff) << 5); | |
6029 | break; | |
6030 | ||
6031 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
6032 | // Change to movk. | |
6033 | newinsn = 0xf2800000 | ((x & 0xffff) << 5); | |
6034 | break; | |
6035 | ||
6036 | default: | |
6037 | gold_error(_("unsupported tlsdesc gd_to_le optimization on reloc %u"), | |
6038 | r_type); | |
6039 | gold_unreachable(); | |
6040 | } | |
6041 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
6042 | return aarch64_reloc_funcs::STATUS_OKAY; | |
6043 | } // End of tls_desc_gd_to_le | |
6044 | ||
6045 | ||
6046 | template<int size, bool big_endian> | |
6047 | inline | |
83a01957 | 6048 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 6049 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_ie( |
83a01957 | 6050 | const Relocate_info<size, big_endian>* /* relinfo */, |
3a531937 JY |
6051 | Target_aarch64<size, big_endian>* /* target */, |
6052 | const elfcpp::Rela<size, big_endian>& rela, | |
6053 | unsigned int r_type, | |
6054 | unsigned char* view, | |
6055 | const Symbol_value<size>* /* psymval */, | |
6056 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address, | |
6057 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
6058 | { | |
6059 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 6060 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
6061 | |
6062 | // TLSDESC-GD sequence is like: | |
6063 | // adrp x0, :tlsdesc:v1 | |
6064 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
6065 | // add x0, x0, :tlsdesc_lo12:v1 | |
6066 | // .tlsdesccall v1 | |
6067 | // blr x1 | |
6068 | // After desc_gd_to_ie optimization, the sequence will be like: | |
6069 | // adrp x0, :tlsie:v1 | |
6070 | // ldr x0, [x0, :tlsie_lo12:v1] | |
6071 | // nop | |
6072 | // nop | |
6073 | ||
6074 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
6075 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
6076 | Insntype newinsn; | |
6077 | switch (r_type) | |
6078 | { | |
6079 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
6080 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
6081 | // Change to nop | |
6082 | newinsn = 0xd503201f; | |
6083 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
6084 | break; | |
6085 | ||
6086 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
6087 | { | |
6088 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
6089 | address); | |
6090 | } | |
6091 | break; | |
6092 | ||
6093 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
6094 | { | |
6095 | const AArch64_reloc_property* reloc_property = | |
6096 | aarch64_reloc_property_table->get_reloc_property( | |
6097 | elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC); | |
6098 | return aarch64_reloc_funcs::template rela_general<32>( | |
6099 | view, got_entry_address, addend, reloc_property); | |
6100 | } | |
6101 | break; | |
8e33481e | 6102 | |
3a531937 JY |
6103 | default: |
6104 | gold_error(_("Don't support tlsdesc gd_to_ie optimization on reloc %u"), | |
6105 | r_type); | |
6106 | gold_unreachable(); | |
6107 | } | |
6108 | return aarch64_reloc_funcs::STATUS_OKAY; | |
6109 | } // End of tls_desc_gd_to_ie | |
8e33481e | 6110 | |
053a4d68 JY |
6111 | // Relocate section data. |
6112 | ||
6113 | template<int size, bool big_endian> | |
6114 | void | |
6115 | Target_aarch64<size, big_endian>::relocate_section( | |
9363c7c3 | 6116 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 6117 | unsigned int sh_type, |
9363c7c3 JY |
6118 | const unsigned char* prelocs, |
6119 | size_t reloc_count, | |
6120 | Output_section* output_section, | |
6121 | bool needs_special_offset_handling, | |
6122 | unsigned char* view, | |
6123 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
6124 | section_size_type view_size, | |
6125 | const Reloc_symbol_changes* reloc_symbol_changes) | |
053a4d68 | 6126 | { |
053a4d68 | 6127 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9363c7c3 JY |
6128 | typedef typename Target_aarch64<size, big_endian>::Relocate AArch64_relocate; |
6129 | gold::relocate_section<size, big_endian, Target_aarch64, elfcpp::SHT_RELA, | |
6130 | AArch64_relocate, gold::Default_comdat_behavior>( | |
6131 | relinfo, | |
6132 | this, | |
6133 | prelocs, | |
6134 | reloc_count, | |
6135 | output_section, | |
6136 | needs_special_offset_handling, | |
6137 | view, | |
6138 | address, | |
6139 | view_size, | |
6140 | reloc_symbol_changes); | |
053a4d68 JY |
6141 | } |
6142 | ||
6143 | // Return the size of a relocation while scanning during a relocatable | |
6144 | // link. | |
6145 | ||
6146 | template<int size, bool big_endian> | |
6147 | unsigned int | |
6148 | Target_aarch64<size, big_endian>::Relocatable_size_for_reloc:: | |
6149 | get_size_for_reloc( | |
6150 | unsigned int , | |
6151 | Relobj* ) | |
6152 | { | |
6153 | // We will never support SHT_REL relocations. | |
6154 | gold_unreachable(); | |
6155 | return 0; | |
6156 | } | |
6157 | ||
6158 | // Scan the relocs during a relocatable link. | |
6159 | ||
6160 | template<int size, bool big_endian> | |
6161 | void | |
6162 | Target_aarch64<size, big_endian>::scan_relocatable_relocs( | |
8e33481e HS |
6163 | Symbol_table* symtab, |
6164 | Layout* layout, | |
6165 | Sized_relobj_file<size, big_endian>* object, | |
6166 | unsigned int data_shndx, | |
053a4d68 | 6167 | unsigned int sh_type, |
8e33481e HS |
6168 | const unsigned char* prelocs, |
6169 | size_t reloc_count, | |
6170 | Output_section* output_section, | |
6171 | bool needs_special_offset_handling, | |
6172 | size_t local_symbol_count, | |
6173 | const unsigned char* plocal_symbols, | |
6174 | Relocatable_relocs* rr) | |
053a4d68 | 6175 | { |
053a4d68 | 6176 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e HS |
6177 | |
6178 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
6179 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
6180 | ||
6181 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
6182 | Scan_relocatable_relocs>( | |
6183 | symtab, | |
6184 | layout, | |
6185 | object, | |
6186 | data_shndx, | |
6187 | prelocs, | |
6188 | reloc_count, | |
6189 | output_section, | |
6190 | needs_special_offset_handling, | |
6191 | local_symbol_count, | |
6192 | plocal_symbols, | |
6193 | rr); | |
053a4d68 JY |
6194 | } |
6195 | ||
6196 | // Relocate a section during a relocatable link. | |
6197 | ||
6198 | template<int size, bool big_endian> | |
6199 | void | |
6200 | Target_aarch64<size, big_endian>::relocate_relocs( | |
8e33481e | 6201 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 6202 | unsigned int sh_type, |
8e33481e HS |
6203 | const unsigned char* prelocs, |
6204 | size_t reloc_count, | |
6205 | Output_section* output_section, | |
6206 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
6207 | const Relocatable_relocs* rr, | |
6208 | unsigned char* view, | |
6209 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
6210 | section_size_type view_size, | |
6211 | unsigned char* reloc_view, | |
6212 | section_size_type reloc_view_size) | |
053a4d68 | 6213 | { |
053a4d68 | 6214 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e HS |
6215 | |
6216 | gold::relocate_relocs<size, big_endian, elfcpp::SHT_RELA>( | |
6217 | relinfo, | |
6218 | prelocs, | |
6219 | reloc_count, | |
6220 | output_section, | |
6221 | offset_in_output_section, | |
6222 | rr, | |
6223 | view, | |
6224 | view_address, | |
6225 | view_size, | |
6226 | reloc_view, | |
6227 | reloc_view_size); | |
053a4d68 JY |
6228 | } |
6229 | ||
83a01957 | 6230 | |
053a4d68 JY |
6231 | // The selector for aarch64 object files. |
6232 | ||
6233 | template<int size, bool big_endian> | |
6234 | class Target_selector_aarch64 : public Target_selector | |
6235 | { | |
6236 | public: | |
9363c7c3 | 6237 | Target_selector_aarch64(); |
053a4d68 JY |
6238 | |
6239 | virtual Target* | |
6240 | do_instantiate_target() | |
6241 | { return new Target_aarch64<size, big_endian>(); } | |
6242 | }; | |
6243 | ||
9363c7c3 JY |
6244 | template<> |
6245 | Target_selector_aarch64<32, true>::Target_selector_aarch64() | |
6246 | : Target_selector(elfcpp::EM_AARCH64, 32, true, | |
6247 | "elf32-bigaarch64", "aarch64_elf32_be_vec") | |
6248 | { } | |
6249 | ||
6250 | template<> | |
6251 | Target_selector_aarch64<32, false>::Target_selector_aarch64() | |
6252 | : Target_selector(elfcpp::EM_AARCH64, 32, false, | |
6253 | "elf32-littleaarch64", "aarch64_elf32_le_vec") | |
6254 | { } | |
6255 | ||
6256 | template<> | |
6257 | Target_selector_aarch64<64, true>::Target_selector_aarch64() | |
6258 | : Target_selector(elfcpp::EM_AARCH64, 64, true, | |
6259 | "elf64-bigaarch64", "aarch64_elf64_be_vec") | |
6260 | { } | |
6261 | ||
6262 | template<> | |
6263 | Target_selector_aarch64<64, false>::Target_selector_aarch64() | |
6264 | : Target_selector(elfcpp::EM_AARCH64, 64, false, | |
6265 | "elf64-littleaarch64", "aarch64_elf64_le_vec") | |
6266 | { } | |
6267 | ||
053a4d68 JY |
6268 | Target_selector_aarch64<32, true> target_selector_aarch64elf32b; |
6269 | Target_selector_aarch64<32, false> target_selector_aarch64elf32; | |
6270 | Target_selector_aarch64<64, true> target_selector_aarch64elfb; | |
6271 | Target_selector_aarch64<64, false> target_selector_aarch64elf; | |
6272 | ||
053a4d68 | 6273 | } // End anonymous namespace. |