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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 | ||
50 | namespace | |
51 | { | |
52 | ||
53 | using namespace gold; | |
54 | ||
55 | template<int size, bool big_endian> | |
56 | class Output_data_plt_aarch64; | |
57 | ||
58 | template<int size, bool big_endian> | |
59 | class Output_data_plt_aarch64_standard; | |
60 | ||
61 | template<int size, bool big_endian> | |
62 | class Target_aarch64; | |
63 | ||
9363c7c3 JY |
64 | template<int size, bool big_endian> |
65 | class AArch64_relocate_functions; | |
66 | ||
053a4d68 JY |
67 | // Output_data_got_aarch64 class. |
68 | ||
69 | template<int size, bool big_endian> | |
70 | class Output_data_got_aarch64 : public Output_data_got<size, big_endian> | |
71 | { | |
72 | public: | |
73 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
74 | Output_data_got_aarch64(Symbol_table* symtab, Layout* layout) | |
9363c7c3 JY |
75 | : Output_data_got<size, big_endian>(), |
76 | symbol_table_(symtab), layout_(layout) | |
053a4d68 JY |
77 | { } |
78 | ||
8e33481e HS |
79 | // Add a static entry for the GOT entry at OFFSET. GSYM is a global |
80 | // symbol and R_TYPE is the code of a dynamic relocation that needs to be | |
81 | // applied in a static link. | |
82 | void | |
83 | add_static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
84 | { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } | |
85 | ||
86 | ||
87 | // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object | |
88 | // defining a local symbol with INDEX. R_TYPE is the code of a dynamic | |
89 | // relocation that needs to be applied in a static link. | |
90 | void | |
91 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
92 | Sized_relobj_file<size, big_endian>* relobj, | |
93 | unsigned int index) | |
94 | { | |
95 | this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, | |
96 | index)); | |
97 | } | |
98 | ||
99 | ||
053a4d68 JY |
100 | protected: |
101 | // Write out the GOT table. | |
102 | void | |
103 | do_write(Output_file* of) { | |
104 | // The first entry in the GOT is the address of the .dynamic section. | |
105 | gold_assert(this->data_size() >= size / 8); | |
106 | Output_section* dynamic = this->layout_->dynamic_section(); | |
107 | Valtype dynamic_addr = dynamic == NULL ? 0 : dynamic->address(); | |
108 | this->replace_constant(0, dynamic_addr); | |
109 | Output_data_got<size, big_endian>::do_write(of); | |
8e33481e HS |
110 | |
111 | // Handling static relocs | |
112 | if (this->static_relocs_.empty()) | |
113 | return; | |
114 | ||
115 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
116 | ||
117 | gold_assert(parameters->doing_static_link()); | |
118 | const off_t offset = this->offset(); | |
119 | const section_size_type oview_size = | |
120 | convert_to_section_size_type(this->data_size()); | |
121 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
122 | ||
123 | Output_segment* tls_segment = this->layout_->tls_segment(); | |
124 | gold_assert(tls_segment != NULL); | |
125 | ||
126 | AArch64_address aligned_tcb_address = | |
127 | align_address(Target_aarch64<size,big_endian>::TCB_SIZE, | |
128 | tls_segment->maximum_alignment()); | |
129 | ||
130 | for (size_t i = 0; i < this->static_relocs_.size(); ++i) | |
131 | { | |
132 | Static_reloc& reloc(this->static_relocs_[i]); | |
133 | AArch64_address value; | |
134 | ||
135 | if (!reloc.symbol_is_global()) | |
136 | { | |
137 | Sized_relobj_file<size, big_endian>* object = reloc.relobj(); | |
138 | const Symbol_value<size>* psymval = | |
139 | reloc.relobj()->local_symbol(reloc.index()); | |
140 | ||
141 | // We are doing static linking. Issue an error and skip this | |
142 | // relocation if the symbol is undefined or in a discarded_section. | |
143 | bool is_ordinary; | |
144 | unsigned int shndx = psymval->input_shndx(&is_ordinary); | |
145 | if ((shndx == elfcpp::SHN_UNDEF) | |
146 | || (is_ordinary | |
147 | && shndx != elfcpp::SHN_UNDEF | |
148 | && !object->is_section_included(shndx) | |
149 | && !this->symbol_table_->is_section_folded(object, shndx))) | |
150 | { | |
151 | gold_error(_("undefined or discarded local symbol %u from " | |
152 | " object %s in GOT"), | |
153 | reloc.index(), reloc.relobj()->name().c_str()); | |
154 | continue; | |
155 | } | |
156 | value = psymval->value(object, 0); | |
157 | } | |
158 | else | |
159 | { | |
160 | const Symbol* gsym = reloc.symbol(); | |
161 | gold_assert(gsym != NULL); | |
162 | if (gsym->is_forwarder()) | |
163 | gsym = this->symbol_table_->resolve_forwards(gsym); | |
164 | ||
165 | // We are doing static linking. Issue an error and skip this | |
166 | // relocation if the symbol is undefined or in a discarded_section | |
167 | // unless it is a weakly_undefined symbol. | |
168 | if ((gsym->is_defined_in_discarded_section() | |
169 | || gsym->is_undefined()) | |
170 | && !gsym->is_weak_undefined()) | |
171 | { | |
172 | gold_error(_("undefined or discarded symbol %s in GOT"), | |
173 | gsym->name()); | |
174 | continue; | |
175 | } | |
176 | ||
177 | if (!gsym->is_weak_undefined()) | |
178 | { | |
179 | const Sized_symbol<size>* sym = | |
180 | static_cast<const Sized_symbol<size>*>(gsym); | |
181 | value = sym->value(); | |
182 | } | |
183 | else | |
184 | value = 0; | |
185 | } | |
186 | ||
187 | unsigned got_offset = reloc.got_offset(); | |
188 | gold_assert(got_offset < oview_size); | |
189 | ||
190 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
191 | Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); | |
192 | Valtype x; | |
193 | switch (reloc.r_type()) | |
194 | { | |
195 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
196 | x = value; | |
197 | break; | |
198 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
199 | x = value + aligned_tcb_address; | |
200 | break; | |
201 | default: | |
202 | gold_unreachable(); | |
203 | } | |
204 | elfcpp::Swap<size, big_endian>::writeval(wv, x); | |
205 | } | |
206 | ||
207 | of->write_output_view(offset, oview_size, oview); | |
053a4d68 JY |
208 | } |
209 | ||
210 | private: | |
9363c7c3 JY |
211 | // Symbol table of the output object. |
212 | Symbol_table* symbol_table_; | |
053a4d68 JY |
213 | // A pointer to the Layout class, so that we can find the .dynamic |
214 | // section when we write out the GOT section. | |
215 | Layout* layout_; | |
8e33481e | 216 | |
8e33481e HS |
217 | // This class represent dynamic relocations that need to be applied by |
218 | // gold because we are using TLS relocations in a static link. | |
219 | class Static_reloc | |
220 | { | |
221 | public: | |
222 | Static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
223 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) | |
224 | { this->u_.global.symbol = gsym; } | |
225 | ||
226 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
227 | Sized_relobj_file<size, big_endian>* relobj, unsigned int index) | |
228 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) | |
229 | { | |
230 | this->u_.local.relobj = relobj; | |
231 | this->u_.local.index = index; | |
232 | } | |
233 | ||
234 | // Return the GOT offset. | |
235 | unsigned int | |
236 | got_offset() const | |
237 | { return this->got_offset_; } | |
238 | ||
239 | // Relocation type. | |
240 | unsigned int | |
241 | r_type() const | |
242 | { return this->r_type_; } | |
243 | ||
244 | // Whether the symbol is global or not. | |
245 | bool | |
246 | symbol_is_global() const | |
247 | { return this->symbol_is_global_; } | |
248 | ||
249 | // For a relocation against a global symbol, the global symbol. | |
250 | Symbol* | |
251 | symbol() const | |
252 | { | |
253 | gold_assert(this->symbol_is_global_); | |
254 | return this->u_.global.symbol; | |
255 | } | |
256 | ||
257 | // For a relocation against a local symbol, the defining object. | |
258 | Sized_relobj_file<size, big_endian>* | |
259 | relobj() const | |
260 | { | |
261 | gold_assert(!this->symbol_is_global_); | |
262 | return this->u_.local.relobj; | |
263 | } | |
264 | ||
265 | // For a relocation against a local symbol, the local symbol index. | |
266 | unsigned int | |
267 | index() const | |
268 | { | |
269 | gold_assert(!this->symbol_is_global_); | |
270 | return this->u_.local.index; | |
271 | } | |
272 | ||
273 | private: | |
274 | // GOT offset of the entry to which this relocation is applied. | |
275 | unsigned int got_offset_; | |
276 | // Type of relocation. | |
277 | unsigned int r_type_; | |
278 | // Whether this relocation is against a global symbol. | |
279 | bool symbol_is_global_; | |
280 | // A global or local symbol. | |
281 | union | |
282 | { | |
283 | struct | |
284 | { | |
285 | // For a global symbol, the symbol itself. | |
286 | Symbol* symbol; | |
287 | } global; | |
288 | struct | |
289 | { | |
290 | // For a local symbol, the object defining object. | |
291 | Sized_relobj_file<size, big_endian>* relobj; | |
292 | // For a local symbol, the symbol index. | |
293 | unsigned int index; | |
294 | } local; | |
295 | } u_; | |
296 | }; // End of inner class Static_reloc | |
297 | ||
298 | std::vector<Static_reloc> static_relocs_; | |
3a531937 JY |
299 | }; // End of Output_data_got_aarch64 |
300 | ||
053a4d68 | 301 | |
9363c7c3 JY |
302 | AArch64_reloc_property_table* aarch64_reloc_property_table = NULL; |
303 | ||
3a531937 | 304 | |
053a4d68 JY |
305 | // The aarch64 target class. |
306 | // See the ABI at | |
307 | // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf | |
308 | template<int size, bool big_endian> | |
309 | class Target_aarch64 : public Sized_target<size, big_endian> | |
310 | { | |
311 | public: | |
8e33481e | 312 | typedef Target_aarch64<size,big_endian> This; |
053a4d68 JY |
313 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
314 | Reloc_section; | |
315 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
8e33481e | 316 | const static int TCB_SIZE = size / 8 * 2; |
053a4d68 JY |
317 | |
318 | Target_aarch64(const Target::Target_info* info = &aarch64_info) | |
319 | : Sized_target<size, big_endian>(info), | |
3a531937 JY |
320 | got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL), |
321 | got_tlsdesc_(NULL), global_offset_table_(NULL), rela_dyn_(NULL), | |
322 | rela_irelative_(NULL), copy_relocs_(elfcpp::R_AARCH64_COPY), | |
323 | got_mod_index_offset_(-1U), tlsdesc_reloc_info_(), | |
324 | tls_base_symbol_defined_(false) | |
053a4d68 JY |
325 | { } |
326 | ||
327 | // Scan the relocations to determine unreferenced sections for | |
328 | // garbage collection. | |
329 | void | |
330 | gc_process_relocs(Symbol_table* symtab, | |
331 | Layout* layout, | |
332 | Sized_relobj_file<size, big_endian>* object, | |
333 | unsigned int data_shndx, | |
334 | unsigned int sh_type, | |
335 | const unsigned char* prelocs, | |
336 | size_t reloc_count, | |
337 | Output_section* output_section, | |
338 | bool needs_special_offset_handling, | |
339 | size_t local_symbol_count, | |
340 | const unsigned char* plocal_symbols); | |
341 | ||
342 | // Scan the relocations to look for symbol adjustments. | |
343 | void | |
344 | scan_relocs(Symbol_table* symtab, | |
345 | Layout* layout, | |
346 | Sized_relobj_file<size, big_endian>* object, | |
347 | unsigned int data_shndx, | |
348 | unsigned int sh_type, | |
349 | const unsigned char* prelocs, | |
350 | size_t reloc_count, | |
351 | Output_section* output_section, | |
352 | bool needs_special_offset_handling, | |
353 | size_t local_symbol_count, | |
354 | const unsigned char* plocal_symbols); | |
355 | ||
356 | // Finalize the sections. | |
357 | void | |
358 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); | |
359 | ||
3a531937 JY |
360 | // Return the value to use for a dynamic which requires special |
361 | // treatment. | |
362 | uint64_t | |
363 | do_dynsym_value(const Symbol*) const; | |
364 | ||
053a4d68 JY |
365 | // Relocate a section. |
366 | void | |
367 | relocate_section(const Relocate_info<size, big_endian>*, | |
368 | unsigned int sh_type, | |
369 | const unsigned char* prelocs, | |
370 | size_t reloc_count, | |
371 | Output_section* output_section, | |
372 | bool needs_special_offset_handling, | |
373 | unsigned char* view, | |
374 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
375 | section_size_type view_size, | |
376 | const Reloc_symbol_changes*); | |
377 | ||
378 | // Scan the relocs during a relocatable link. | |
379 | void | |
380 | scan_relocatable_relocs(Symbol_table* symtab, | |
381 | Layout* layout, | |
382 | Sized_relobj_file<size, big_endian>* object, | |
383 | unsigned int data_shndx, | |
384 | unsigned int sh_type, | |
385 | const unsigned char* prelocs, | |
386 | size_t reloc_count, | |
387 | Output_section* output_section, | |
388 | bool needs_special_offset_handling, | |
389 | size_t local_symbol_count, | |
390 | const unsigned char* plocal_symbols, | |
391 | Relocatable_relocs*); | |
392 | ||
393 | // Relocate a section during a relocatable link. | |
394 | void | |
395 | relocate_relocs( | |
396 | const Relocate_info<size, big_endian>*, | |
397 | unsigned int sh_type, | |
398 | const unsigned char* prelocs, | |
399 | size_t reloc_count, | |
400 | Output_section* output_section, | |
401 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
402 | const Relocatable_relocs*, | |
403 | unsigned char* view, | |
404 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
405 | section_size_type view_size, | |
406 | unsigned char* reloc_view, | |
407 | section_size_type reloc_view_size); | |
408 | ||
3a531937 JY |
409 | // Return the symbol index to use for a target specific relocation. |
410 | // The only target specific relocation is R_AARCH64_TLSDESC for a | |
411 | // local symbol, which is an absolute reloc. | |
412 | unsigned int | |
413 | do_reloc_symbol_index(void*, unsigned int r_type) const | |
414 | { | |
415 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
416 | return 0; | |
417 | } | |
418 | ||
419 | // Return the addend to use for a target specific relocation. | |
420 | typename elfcpp::Elf_types<size>::Elf_Addr | |
421 | do_reloc_addend(void* arg, unsigned int r_type, | |
422 | typename elfcpp::Elf_types<size>::Elf_Addr addend) const; | |
423 | ||
9363c7c3 JY |
424 | // Return the PLT section. |
425 | uint64_t | |
426 | do_plt_address_for_global(const Symbol* gsym) const | |
427 | { return this->plt_section()->address_for_global(gsym); } | |
428 | ||
429 | uint64_t | |
430 | do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const | |
431 | { return this->plt_section()->address_for_local(relobj, symndx); } | |
432 | ||
053a4d68 JY |
433 | // Return the number of entries in the PLT. |
434 | unsigned int | |
435 | plt_entry_count() const; | |
436 | ||
437 | //Return the offset of the first non-reserved PLT entry. | |
438 | unsigned int | |
439 | first_plt_entry_offset() const; | |
440 | ||
441 | // Return the size of each PLT entry. | |
442 | unsigned int | |
443 | plt_entry_size() const; | |
444 | ||
8e33481e HS |
445 | unsigned int |
446 | tcb_size() const { return This::TCB_SIZE; } | |
447 | ||
9363c7c3 JY |
448 | protected: |
449 | void | |
450 | do_select_as_default_target() | |
451 | { | |
452 | gold_assert(aarch64_reloc_property_table == NULL); | |
453 | aarch64_reloc_property_table = new AArch64_reloc_property_table(); | |
454 | } | |
455 | ||
3a531937 JY |
456 | // Add a new reloc argument, returning the index in the vector. |
457 | size_t | |
458 | add_tlsdesc_info(Sized_relobj_file<size, big_endian>* object, | |
459 | unsigned int r_sym) | |
460 | { | |
461 | this->tlsdesc_reloc_info_.push_back(Tlsdesc_info(object, r_sym)); | |
462 | return this->tlsdesc_reloc_info_.size() - 1; | |
463 | } | |
464 | ||
9363c7c3 | 465 | virtual Output_data_plt_aarch64<size, big_endian>* |
3a531937 JY |
466 | do_make_data_plt(Layout* layout, |
467 | Output_data_got_aarch64<size, big_endian>* got, | |
468 | Output_data_space* got_plt, | |
469 | Output_data_space* got_irelative) | |
9363c7c3 | 470 | { |
3a531937 JY |
471 | return new Output_data_plt_aarch64_standard<size, big_endian>( |
472 | layout, got, got_plt, got_irelative); | |
9363c7c3 JY |
473 | } |
474 | ||
475 | Output_data_plt_aarch64<size, big_endian>* | |
3a531937 JY |
476 | make_data_plt(Layout* layout, |
477 | Output_data_got_aarch64<size, big_endian>* got, | |
478 | Output_data_space* got_plt, | |
479 | Output_data_space* got_irelative) | |
9363c7c3 | 480 | { |
3a531937 | 481 | return this->do_make_data_plt(layout, got, got_plt, got_irelative); |
9363c7c3 JY |
482 | } |
483 | ||
053a4d68 JY |
484 | private: |
485 | // The class which scans relocations. | |
486 | class Scan | |
487 | { | |
488 | public: | |
489 | Scan() | |
490 | : issued_non_pic_error_(false) | |
491 | { } | |
492 | ||
053a4d68 JY |
493 | inline void |
494 | local(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
495 | Sized_relobj_file<size, big_endian>* object, | |
496 | unsigned int data_shndx, | |
497 | Output_section* output_section, | |
498 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
499 | const elfcpp::Sym<size, big_endian>& lsym, | |
500 | bool is_discarded); | |
501 | ||
502 | inline void | |
503 | global(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
504 | Sized_relobj_file<size, big_endian>* object, | |
505 | unsigned int data_shndx, | |
506 | Output_section* output_section, | |
507 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
508 | Symbol* gsym); | |
509 | ||
510 | inline bool | |
511 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
512 | Target_aarch64<size, big_endian>* , |
513 | Sized_relobj_file<size, big_endian>* , | |
514 | unsigned int , | |
515 | Output_section* , | |
516 | const elfcpp::Rela<size, big_endian>& , | |
517 | unsigned int r_type, | |
518 | const elfcpp::Sym<size, big_endian>&); | |
053a4d68 JY |
519 | |
520 | inline bool | |
521 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
522 | Target_aarch64<size, big_endian>* , |
523 | Sized_relobj_file<size, big_endian>* , | |
524 | unsigned int , | |
525 | Output_section* , | |
526 | const elfcpp::Rela<size, big_endian>& , | |
527 | unsigned int r_type, | |
528 | Symbol* gsym); | |
053a4d68 JY |
529 | |
530 | private: | |
531 | static void | |
532 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, | |
533 | unsigned int r_type); | |
534 | ||
535 | static void | |
536 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, | |
537 | unsigned int r_type, Symbol*); | |
538 | ||
539 | inline bool | |
540 | possible_function_pointer_reloc(unsigned int r_type); | |
541 | ||
542 | void | |
543 | check_non_pic(Relobj*, unsigned int r_type); | |
544 | ||
545 | // Whether we have issued an error about a non-PIC compilation. | |
546 | bool issued_non_pic_error_; | |
547 | }; | |
548 | ||
549 | // The class which implements relocation. | |
550 | class Relocate | |
551 | { | |
552 | public: | |
553 | Relocate() | |
3a531937 | 554 | : skip_call_tls_get_addr_(false) |
053a4d68 JY |
555 | { } |
556 | ||
557 | ~Relocate() | |
558 | { } | |
559 | ||
560 | // Do a relocation. Return false if the caller should not issue | |
561 | // any warnings about this relocation. | |
562 | inline bool | |
563 | relocate(const Relocate_info<size, big_endian>*, Target_aarch64*, | |
564 | Output_section*, | |
565 | size_t relnum, const elfcpp::Rela<size, big_endian>&, | |
566 | unsigned int r_type, const Sized_symbol<size>*, | |
567 | const Symbol_value<size>*, | |
568 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
569 | section_size_type); | |
570 | ||
8e33481e HS |
571 | private: |
572 | inline typename AArch64_relocate_functions<size,big_endian>::Status | |
573 | relocate_tls(const Relocate_info<size,big_endian>*, | |
574 | Target_aarch64<size, big_endian>*, | |
575 | size_t, | |
576 | const elfcpp::Rela<size, big_endian>&, | |
577 | unsigned int r_type, const Sized_symbol<size>*, | |
578 | const Symbol_value<size>*, | |
579 | unsigned char*, | |
580 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
581 | ||
3a531937 JY |
582 | inline typename AArch64_relocate_functions<size,big_endian>::Status |
583 | tls_gd_to_le( | |
584 | const Relocate_info<size,big_endian>*, | |
585 | Target_aarch64<size, big_endian>*, | |
586 | const elfcpp::Rela<size, big_endian>&, | |
587 | unsigned int, | |
588 | unsigned char*, | |
589 | const Symbol_value<size>*); | |
590 | ||
591 | inline typename AArch64_relocate_functions<size,big_endian>::Status | |
592 | tls_ie_to_le( | |
593 | const Relocate_info<size,big_endian>*, | |
594 | Target_aarch64<size, big_endian>*, | |
595 | const elfcpp::Rela<size, big_endian>&, | |
596 | unsigned int, | |
597 | unsigned char*, | |
598 | const Symbol_value<size>*); | |
599 | ||
600 | inline typename AArch64_relocate_functions<size,big_endian>::Status | |
601 | tls_desc_gd_to_le( | |
602 | const Relocate_info<size,big_endian>*, | |
603 | Target_aarch64<size, big_endian>*, | |
604 | const elfcpp::Rela<size, big_endian>&, | |
605 | unsigned int, | |
606 | unsigned char*, | |
607 | const Symbol_value<size>*); | |
608 | ||
609 | inline typename AArch64_relocate_functions<size,big_endian>::Status | |
610 | tls_desc_gd_to_ie( | |
611 | const Relocate_info<size,big_endian>*, | |
612 | Target_aarch64<size, big_endian>*, | |
613 | const elfcpp::Rela<size, big_endian>&, | |
614 | unsigned int, | |
615 | unsigned char*, | |
616 | const Symbol_value<size>*, | |
617 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
618 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
619 | ||
620 | bool skip_call_tls_get_addr_; | |
621 | ||
8e33481e | 622 | }; // End of class Relocate |
053a4d68 JY |
623 | |
624 | // A class which returns the size required for a relocation type, | |
625 | // used while scanning relocs during a relocatable link. | |
626 | class Relocatable_size_for_reloc | |
627 | { | |
628 | public: | |
629 | unsigned int | |
630 | get_size_for_reloc(unsigned int, Relobj*); | |
631 | }; | |
632 | ||
633 | // Adjust TLS relocation type based on the options and whether this | |
634 | // is a local symbol. | |
635 | static tls::Tls_optimization | |
636 | optimize_tls_reloc(bool is_final, int r_type); | |
637 | ||
638 | // Get the GOT section, creating it if necessary. | |
639 | Output_data_got_aarch64<size, big_endian>* | |
640 | got_section(Symbol_table*, Layout*); | |
641 | ||
642 | // Get the GOT PLT section. | |
643 | Output_data_space* | |
644 | got_plt_section() const | |
645 | { | |
646 | gold_assert(this->got_plt_ != NULL); | |
647 | return this->got_plt_; | |
648 | } | |
649 | ||
3a531937 JY |
650 | // Get the GOT section for TLSDESC entries. |
651 | Output_data_got<size, big_endian>* | |
652 | got_tlsdesc_section() const | |
653 | { | |
654 | gold_assert(this->got_tlsdesc_ != NULL); | |
655 | return this->got_tlsdesc_; | |
656 | } | |
657 | ||
053a4d68 JY |
658 | // Create the PLT section. |
659 | void | |
660 | make_plt_section(Symbol_table* symtab, Layout* layout); | |
661 | ||
662 | // Create a PLT entry for a global symbol. | |
663 | void | |
664 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
665 | ||
3a531937 JY |
666 | // Create a PLT entry for a local STT_GNU_IFUNC symbol. |
667 | void | |
668 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, | |
669 | Sized_relobj_file<size, big_endian>* relobj, | |
670 | unsigned int local_sym_index); | |
671 | ||
672 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. | |
673 | void | |
674 | define_tls_base_symbol(Symbol_table*, Layout*); | |
675 | ||
676 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. | |
677 | void | |
678 | reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout); | |
679 | ||
680 | // Create a GOT entry for the TLS module index. | |
681 | unsigned int | |
682 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
683 | Sized_relobj_file<size, big_endian>* object); | |
684 | ||
053a4d68 JY |
685 | // Get the PLT section. |
686 | Output_data_plt_aarch64<size, big_endian>* | |
687 | plt_section() const | |
688 | { | |
689 | gold_assert(this->plt_ != NULL); | |
690 | return this->plt_; | |
691 | } | |
692 | ||
693 | // Get the dynamic reloc section, creating it if necessary. | |
694 | Reloc_section* | |
695 | rela_dyn_section(Layout*); | |
696 | ||
3a531937 JY |
697 | // Get the section to use for TLSDESC relocations. |
698 | Reloc_section* | |
699 | rela_tlsdesc_section(Layout*) const; | |
700 | ||
701 | // Get the section to use for IRELATIVE relocations. | |
702 | Reloc_section* | |
703 | rela_irelative_section(Layout*); | |
704 | ||
053a4d68 JY |
705 | // Add a potential copy relocation. |
706 | void | |
707 | copy_reloc(Symbol_table* symtab, Layout* layout, | |
708 | Sized_relobj_file<size, big_endian>* object, | |
709 | unsigned int shndx, Output_section* output_section, | |
710 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
711 | { | |
712 | this->copy_relocs_.copy_reloc(symtab, layout, | |
713 | symtab->get_sized_symbol<size>(sym), | |
714 | object, shndx, output_section, | |
715 | reloc, this->rela_dyn_section(layout)); | |
716 | } | |
717 | ||
718 | // Information about this specific target which we pass to the | |
719 | // general Target structure. | |
720 | static const Target::Target_info aarch64_info; | |
721 | ||
722 | // The types of GOT entries needed for this platform. | |
723 | // These values are exposed to the ABI in an incremental link. | |
724 | // Do not renumber existing values without changing the version | |
725 | // number of the .gnu_incremental_inputs section. | |
726 | enum Got_type | |
727 | { | |
728 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
729 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
730 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
731 | GOT_TYPE_TLS_DESC = 3 // GOT entry for TLS_DESC pair | |
732 | }; | |
733 | ||
3a531937 JY |
734 | // This type is used as the argument to the target specific |
735 | // relocation routines. The only target specific reloc is | |
736 | // R_AARCh64_TLSDESC against a local symbol. | |
737 | struct Tlsdesc_info | |
738 | { | |
739 | Tlsdesc_info(Sized_relobj_file<size, big_endian>* a_object, | |
740 | unsigned int a_r_sym) | |
741 | : object(a_object), r_sym(a_r_sym) | |
742 | { } | |
743 | ||
744 | // The object in which the local symbol is defined. | |
745 | Sized_relobj_file<size, big_endian>* object; | |
746 | // The local symbol index in the object. | |
747 | unsigned int r_sym; | |
748 | }; | |
749 | ||
053a4d68 JY |
750 | // The GOT section. |
751 | Output_data_got_aarch64<size, big_endian>* got_; | |
752 | // The PLT section. | |
753 | Output_data_plt_aarch64<size, big_endian>* plt_; | |
754 | // The GOT PLT section. | |
755 | Output_data_space* got_plt_; | |
3a531937 JY |
756 | // The GOT section for IRELATIVE relocations. |
757 | Output_data_space* got_irelative_; | |
758 | // The GOT section for TLSDESC relocations. | |
759 | Output_data_got<size, big_endian>* got_tlsdesc_; | |
053a4d68 JY |
760 | // The _GLOBAL_OFFSET_TABLE_ symbol. |
761 | Symbol* global_offset_table_; | |
762 | // The dynamic reloc section. | |
763 | Reloc_section* rela_dyn_; | |
3a531937 JY |
764 | // The section to use for IRELATIVE relocs. |
765 | Reloc_section* rela_irelative_; | |
053a4d68 JY |
766 | // Relocs saved to avoid a COPY reloc. |
767 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
3a531937 JY |
768 | // Offset of the GOT entry for the TLS module index. |
769 | unsigned int got_mod_index_offset_; | |
770 | // We handle R_AARCH64_TLSDESC against a local symbol as a target | |
771 | // specific relocation. Here we store the object and local symbol | |
772 | // index for the relocation. | |
773 | std::vector<Tlsdesc_info> tlsdesc_reloc_info_; | |
774 | // True if the _TLS_MODULE_BASE_ symbol has been defined. | |
775 | bool tls_base_symbol_defined_; | |
8e33481e | 776 | }; // End of Target_aarch64 |
053a4d68 | 777 | |
3a531937 | 778 | |
053a4d68 JY |
779 | template<> |
780 | const Target::Target_info Target_aarch64<64, false>::aarch64_info = | |
781 | { | |
782 | 64, // size | |
783 | false, // is_big_endian | |
784 | elfcpp::EM_AARCH64, // machine_code | |
785 | false, // has_make_symbol | |
786 | false, // has_resolve | |
787 | false, // has_code_fill | |
788 | true, // is_default_stack_executable | |
789 | false, // can_icf_inline_merge_sections | |
790 | '\0', // wrap_char | |
791 | "/lib/ld.so.1", // program interpreter | |
792 | 0x400000, // default_text_segment_address | |
793 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
794 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
795 | false, // isolate_execinstr | |
796 | 0, // rosegment_gap | |
797 | elfcpp::SHN_UNDEF, // small_common_shndx | |
798 | elfcpp::SHN_UNDEF, // large_common_shndx | |
799 | 0, // small_common_section_flags | |
800 | 0, // large_common_section_flags | |
801 | NULL, // attributes_section | |
802 | NULL, // attributes_vendor | |
803 | "_start" // entry_symbol_name | |
804 | }; | |
805 | ||
806 | template<> | |
807 | const Target::Target_info Target_aarch64<32, false>::aarch64_info = | |
808 | { | |
809 | 32, // size | |
810 | false, // is_big_endian | |
811 | elfcpp::EM_AARCH64, // machine_code | |
812 | false, // has_make_symbol | |
813 | false, // has_resolve | |
814 | false, // has_code_fill | |
815 | true, // is_default_stack_executable | |
816 | false, // can_icf_inline_merge_sections | |
817 | '\0', // wrap_char | |
818 | "/lib/ld.so.1", // program interpreter | |
819 | 0x400000, // default_text_segment_address | |
820 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
821 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
822 | false, // isolate_execinstr | |
823 | 0, // rosegment_gap | |
824 | elfcpp::SHN_UNDEF, // small_common_shndx | |
825 | elfcpp::SHN_UNDEF, // large_common_shndx | |
826 | 0, // small_common_section_flags | |
827 | 0, // large_common_section_flags | |
828 | NULL, // attributes_section | |
829 | NULL, // attributes_vendor | |
830 | "_start" // entry_symbol_name | |
831 | }; | |
832 | ||
833 | template<> | |
834 | const Target::Target_info Target_aarch64<64, true>::aarch64_info = | |
835 | { | |
836 | 64, // size | |
837 | true, // is_big_endian | |
838 | elfcpp::EM_AARCH64, // machine_code | |
839 | false, // has_make_symbol | |
840 | false, // has_resolve | |
841 | false, // has_code_fill | |
842 | true, // is_default_stack_executable | |
843 | false, // can_icf_inline_merge_sections | |
844 | '\0', // wrap_char | |
845 | "/lib/ld.so.1", // program interpreter | |
846 | 0x400000, // default_text_segment_address | |
847 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
848 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
849 | false, // isolate_execinstr | |
850 | 0, // rosegment_gap | |
851 | elfcpp::SHN_UNDEF, // small_common_shndx | |
852 | elfcpp::SHN_UNDEF, // large_common_shndx | |
853 | 0, // small_common_section_flags | |
854 | 0, // large_common_section_flags | |
855 | NULL, // attributes_section | |
856 | NULL, // attributes_vendor | |
857 | "_start" // entry_symbol_name | |
858 | }; | |
859 | ||
860 | template<> | |
861 | const Target::Target_info Target_aarch64<32, true>::aarch64_info = | |
862 | { | |
863 | 32, // size | |
864 | true, // is_big_endian | |
865 | elfcpp::EM_AARCH64, // machine_code | |
866 | false, // has_make_symbol | |
867 | false, // has_resolve | |
868 | false, // has_code_fill | |
869 | true, // is_default_stack_executable | |
870 | false, // can_icf_inline_merge_sections | |
871 | '\0', // wrap_char | |
872 | "/lib/ld.so.1", // program interpreter | |
873 | 0x400000, // default_text_segment_address | |
874 | 0x1000, // abi_pagesize (overridable by -z max-page-size) | |
875 | 0x1000, // common_pagesize (overridable by -z common-page-size) | |
876 | false, // isolate_execinstr | |
877 | 0, // rosegment_gap | |
878 | elfcpp::SHN_UNDEF, // small_common_shndx | |
879 | elfcpp::SHN_UNDEF, // large_common_shndx | |
880 | 0, // small_common_section_flags | |
881 | 0, // large_common_section_flags | |
882 | NULL, // attributes_section | |
883 | NULL, // attributes_vendor | |
884 | "_start" // entry_symbol_name | |
885 | }; | |
886 | ||
887 | // Get the GOT section, creating it if necessary. | |
888 | ||
889 | template<int size, bool big_endian> | |
890 | Output_data_got_aarch64<size, big_endian>* | |
891 | Target_aarch64<size, big_endian>::got_section(Symbol_table* symtab, | |
9363c7c3 | 892 | Layout* layout) |
053a4d68 JY |
893 | { |
894 | if (this->got_ == NULL) | |
895 | { | |
896 | gold_assert(symtab != NULL && layout != NULL); | |
897 | ||
898 | // When using -z now, we can treat .got.plt as a relro section. | |
899 | // Without -z now, it is modified after program startup by lazy | |
900 | // PLT relocations. | |
901 | bool is_got_plt_relro = parameters->options().now(); | |
902 | Output_section_order got_order = (is_got_plt_relro | |
903 | ? ORDER_RELRO | |
904 | : ORDER_RELRO_LAST); | |
905 | Output_section_order got_plt_order = (is_got_plt_relro | |
906 | ? ORDER_RELRO | |
907 | : ORDER_NON_RELRO_FIRST); | |
908 | ||
909 | // Layout of .got and .got.plt sections. | |
910 | // .got[0] &_DYNAMIC <-_GLOBAL_OFFSET_TABLE_ | |
911 | // ... | |
912 | // .gotplt[0] reserved for ld.so (&linkmap) <--DT_PLTGOT | |
913 | // .gotplt[1] reserved for ld.so (resolver) | |
914 | // .gotplt[2] reserved | |
915 | ||
916 | // Generate .got section. | |
917 | this->got_ = new Output_data_got_aarch64<size, big_endian>(symtab, | |
9363c7c3 | 918 | layout); |
053a4d68 | 919 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
9363c7c3 JY |
920 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), |
921 | this->got_, got_order, true); | |
053a4d68 JY |
922 | // The first word of GOT is reserved for the address of .dynamic. |
923 | // We put 0 here now. The value will be replaced later in | |
924 | // Output_data_got_aarch64::do_write. | |
925 | this->got_->add_constant(0); | |
926 | ||
927 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT. | |
928 | // _GLOBAL_OFFSET_TABLE_ value points to the start of the .got section, | |
929 | // even if there is a .got.plt section. | |
930 | this->global_offset_table_ = | |
9363c7c3 JY |
931 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
932 | Symbol_table::PREDEFINED, | |
933 | this->got_, | |
934 | 0, 0, elfcpp::STT_OBJECT, | |
935 | elfcpp::STB_LOCAL, | |
936 | elfcpp::STV_HIDDEN, 0, | |
937 | false, false); | |
053a4d68 JY |
938 | |
939 | // Generate .got.plt section. | |
940 | this->got_plt_ = new Output_data_space(size / 8, "** GOT PLT"); | |
941 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
9363c7c3 JY |
942 | (elfcpp::SHF_ALLOC |
943 | | elfcpp::SHF_WRITE), | |
944 | this->got_plt_, got_plt_order, | |
945 | is_got_plt_relro); | |
053a4d68 JY |
946 | |
947 | // The first three entries are reserved. | |
9363c7c3 JY |
948 | this->got_plt_->set_current_data_size( |
949 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
053a4d68 | 950 | |
3a531937 JY |
951 | // If there are any IRELATIVE relocations, they get GOT entries |
952 | // in .got.plt after the jump slot entries. | |
953 | this->got_irelative_ = new Output_data_space(size / 8, | |
954 | "** GOT IRELATIVE PLT"); | |
955 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
956 | (elfcpp::SHF_ALLOC | |
957 | | elfcpp::SHF_WRITE), | |
958 | this->got_irelative_, | |
959 | got_plt_order, | |
960 | is_got_plt_relro); | |
961 | ||
962 | // If there are any TLSDESC relocations, they get GOT entries in | |
963 | // .got.plt after the jump slot and IRELATIVE entries. | |
964 | this->got_tlsdesc_ = new Output_data_got<size, big_endian>(); | |
965 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
966 | (elfcpp::SHF_ALLOC | |
967 | | elfcpp::SHF_WRITE), | |
968 | this->got_tlsdesc_, | |
969 | got_plt_order, | |
970 | is_got_plt_relro); | |
971 | ||
053a4d68 | 972 | if (!is_got_plt_relro) |
9363c7c3 JY |
973 | { |
974 | // Those bytes can go into the relro segment. | |
975 | layout->increase_relro( | |
976 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
977 | } | |
053a4d68 JY |
978 | |
979 | } | |
980 | return this->got_; | |
981 | } | |
982 | ||
983 | // Get the dynamic reloc section, creating it if necessary. | |
984 | ||
985 | template<int size, bool big_endian> | |
986 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
987 | Target_aarch64<size, big_endian>::rela_dyn_section(Layout* layout) | |
988 | { | |
989 | if (this->rela_dyn_ == NULL) | |
990 | { | |
991 | gold_assert(layout != NULL); | |
992 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
993 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
994 | elfcpp::SHF_ALLOC, this->rela_dyn_, | |
995 | ORDER_DYNAMIC_RELOCS, false); | |
996 | } | |
997 | return this->rela_dyn_; | |
998 | } | |
999 | ||
3a531937 JY |
1000 | // Get the section to use for IRELATIVE relocs, creating it if |
1001 | // necessary. These go in .rela.dyn, but only after all other dynamic | |
1002 | // relocations. They need to follow the other dynamic relocations so | |
1003 | // that they can refer to global variables initialized by those | |
1004 | // relocs. | |
1005 | ||
1006 | template<int size, bool big_endian> | |
1007 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
1008 | Target_aarch64<size, big_endian>::rela_irelative_section(Layout* layout) | |
1009 | { | |
1010 | if (this->rela_irelative_ == NULL) | |
1011 | { | |
1012 | // Make sure we have already created the dynamic reloc section. | |
1013 | this->rela_dyn_section(layout); | |
1014 | this->rela_irelative_ = new Reloc_section(false); | |
1015 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
1016 | elfcpp::SHF_ALLOC, this->rela_irelative_, | |
1017 | ORDER_DYNAMIC_RELOCS, false); | |
1018 | gold_assert(this->rela_dyn_->output_section() | |
1019 | == this->rela_irelative_->output_section()); | |
1020 | } | |
1021 | return this->rela_irelative_; | |
1022 | } | |
1023 | ||
1024 | ||
053a4d68 JY |
1025 | // A class to handle the PLT data. |
1026 | // This is an abstract base class that handles most of the linker details | |
1027 | // but does not know the actual contents of PLT entries. The derived | |
1028 | // classes below fill in those details. | |
1029 | ||
1030 | template<int size, bool big_endian> | |
1031 | class Output_data_plt_aarch64 : public Output_section_data | |
1032 | { | |
1033 | public: | |
1034 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> | |
1035 | Reloc_section; | |
1036 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1037 | ||
1038 | Output_data_plt_aarch64(Layout* layout, | |
9363c7c3 | 1039 | uint64_t addralign, |
3a531937 JY |
1040 | Output_data_got_aarch64<size, big_endian>* got, |
1041 | Output_data_space* got_plt, | |
1042 | Output_data_space* got_irelative) | |
1043 | : Output_section_data(addralign), tlsdesc_rel_(NULL), | |
1044 | got_(got), got_plt_(got_plt), got_irelative_(got_irelative), | |
1045 | count_(0), irelative_count_(0), tlsdesc_got_offset_(-1U) | |
053a4d68 JY |
1046 | { this->init(layout); } |
1047 | ||
1048 | // Initialize the PLT section. | |
1049 | void | |
1050 | init(Layout* layout); | |
1051 | ||
1052 | // Add an entry to the PLT. | |
1053 | void | |
1054 | add_entry(Symbol* gsym); | |
1055 | ||
3a531937 JY |
1056 | // Add the reserved TLSDESC_PLT entry to the PLT. |
1057 | void | |
1058 | reserve_tlsdesc_entry(unsigned int got_offset) | |
1059 | { this->tlsdesc_got_offset_ = got_offset; } | |
1060 | ||
1061 | // Return true if a TLSDESC_PLT entry has been reserved. | |
1062 | bool | |
1063 | has_tlsdesc_entry() const | |
1064 | { return this->tlsdesc_got_offset_ != -1U; } | |
1065 | ||
1066 | // Return the GOT offset for the reserved TLSDESC_PLT entry. | |
1067 | unsigned int | |
1068 | get_tlsdesc_got_offset() const | |
1069 | { return this->tlsdesc_got_offset_; } | |
1070 | ||
1071 | // Return the PLT offset of the reserved TLSDESC_PLT entry. | |
1072 | unsigned int | |
1073 | get_tlsdesc_plt_offset() const | |
1074 | { | |
1075 | return (this->first_plt_entry_offset() + | |
1076 | (this->count_ + this->irelative_count_) | |
1077 | * this->get_plt_entry_size()); | |
1078 | } | |
1079 | ||
053a4d68 JY |
1080 | // Return the .rela.plt section data. |
1081 | Reloc_section* | |
1082 | rela_plt() | |
1083 | { return this->rel_; } | |
1084 | ||
3a531937 JY |
1085 | // Return where the TLSDESC relocations should go. |
1086 | Reloc_section* | |
1087 | rela_tlsdesc(Layout*); | |
1088 | ||
1089 | // Return where the IRELATIVE relocations should go in the PLT | |
1090 | // relocations. | |
1091 | Reloc_section* | |
1092 | rela_irelative(Symbol_table*, Layout*); | |
1093 | ||
9363c7c3 JY |
1094 | // Return whether we created a section for IRELATIVE relocations. |
1095 | bool | |
1096 | has_irelative_section() const | |
1097 | { return this->irelative_rel_ != NULL; } | |
1098 | ||
053a4d68 JY |
1099 | // Return the number of PLT entries. |
1100 | unsigned int | |
1101 | entry_count() const | |
3a531937 | 1102 | { return this->count_ + this->irelative_count_; } |
053a4d68 JY |
1103 | |
1104 | // Return the offset of the first non-reserved PLT entry. | |
1105 | unsigned int | |
3a531937 | 1106 | first_plt_entry_offset() const |
053a4d68 JY |
1107 | { return this->do_first_plt_entry_offset(); } |
1108 | ||
1109 | // Return the size of a PLT entry. | |
1110 | unsigned int | |
1111 | get_plt_entry_size() const | |
1112 | { return this->do_get_plt_entry_size(); } | |
1113 | ||
3a531937 JY |
1114 | // Return the reserved tlsdesc entry size. |
1115 | unsigned int | |
1116 | get_plt_tlsdesc_entry_size() const | |
1117 | { return this->do_get_plt_tlsdesc_entry_size(); } | |
1118 | ||
9363c7c3 JY |
1119 | // Return the PLT address to use for a global symbol. |
1120 | uint64_t | |
1121 | address_for_global(const Symbol*); | |
1122 | ||
1123 | // Return the PLT address to use for a local symbol. | |
1124 | uint64_t | |
1125 | address_for_local(const Relobj*, unsigned int symndx); | |
1126 | ||
053a4d68 JY |
1127 | protected: |
1128 | // Fill in the first PLT entry. | |
1129 | void | |
1130 | fill_first_plt_entry(unsigned char* pov, | |
1131 | Address got_address, | |
1132 | Address plt_address) | |
1133 | { this->do_fill_first_plt_entry(pov, got_address, plt_address); } | |
1134 | ||
1135 | // Fill in a normal PLT entry. | |
1136 | void | |
1137 | fill_plt_entry(unsigned char* pov, | |
1138 | Address got_address, | |
1139 | Address plt_address, | |
1140 | unsigned int got_offset, | |
1141 | unsigned int plt_offset) | |
1142 | { | |
1143 | this->do_fill_plt_entry(pov, got_address, plt_address, | |
1144 | got_offset, plt_offset); | |
1145 | } | |
1146 | ||
3a531937 JY |
1147 | // Fill in the reserved TLSDESC PLT entry. |
1148 | void | |
1149 | fill_tlsdesc_entry(unsigned char* pov, | |
1150 | Address gotplt_address, | |
1151 | Address plt_address, | |
1152 | Address got_base, | |
1153 | unsigned int tlsdesc_got_offset, | |
1154 | unsigned int plt_offset) | |
1155 | { | |
1156 | this->do_fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
1157 | tlsdesc_got_offset, plt_offset); | |
1158 | } | |
1159 | ||
053a4d68 JY |
1160 | virtual unsigned int |
1161 | do_first_plt_entry_offset() const = 0; | |
1162 | ||
1163 | virtual unsigned int | |
1164 | do_get_plt_entry_size() const = 0; | |
1165 | ||
3a531937 JY |
1166 | virtual unsigned int |
1167 | do_get_plt_tlsdesc_entry_size() const = 0; | |
1168 | ||
053a4d68 JY |
1169 | virtual void |
1170 | do_fill_first_plt_entry(unsigned char* pov, | |
1171 | Address got_addr, | |
1172 | Address plt_addr) = 0; | |
1173 | ||
1174 | virtual void | |
1175 | do_fill_plt_entry(unsigned char* pov, | |
1176 | Address got_address, | |
1177 | Address plt_address, | |
1178 | unsigned int got_offset, | |
1179 | unsigned int plt_offset) = 0; | |
1180 | ||
3a531937 JY |
1181 | virtual void |
1182 | do_fill_tlsdesc_entry(unsigned char* pov, | |
1183 | Address gotplt_address, | |
1184 | Address plt_address, | |
1185 | Address got_base, | |
1186 | unsigned int tlsdesc_got_offset, | |
1187 | unsigned int plt_offset) = 0; | |
1188 | ||
053a4d68 JY |
1189 | void |
1190 | do_adjust_output_section(Output_section* os); | |
1191 | ||
1192 | // Write to a map file. | |
1193 | void | |
1194 | do_print_to_mapfile(Mapfile* mapfile) const | |
1195 | { mapfile->print_output_data(this, _("** PLT")); } | |
1196 | ||
1197 | private: | |
1198 | // Set the final size. | |
1199 | void | |
1200 | set_final_data_size(); | |
1201 | ||
1202 | // Write out the PLT data. | |
1203 | void | |
1204 | do_write(Output_file*); | |
1205 | ||
1206 | // The reloc section. | |
1207 | Reloc_section* rel_; | |
3a531937 JY |
1208 | |
1209 | // The TLSDESC relocs, if necessary. These must follow the regular | |
1210 | // PLT relocs. | |
1211 | Reloc_section* tlsdesc_rel_; | |
1212 | ||
9363c7c3 JY |
1213 | // The IRELATIVE relocs, if necessary. These must follow the |
1214 | // regular PLT relocations. | |
1215 | Reloc_section* irelative_rel_; | |
3a531937 | 1216 | |
053a4d68 JY |
1217 | // The .got section. |
1218 | Output_data_got_aarch64<size, big_endian>* got_; | |
3a531937 | 1219 | |
053a4d68 JY |
1220 | // The .got.plt section. |
1221 | Output_data_space* got_plt_; | |
3a531937 JY |
1222 | |
1223 | // The part of the .got.plt section used for IRELATIVE relocs. | |
1224 | Output_data_space* got_irelative_; | |
1225 | ||
053a4d68 JY |
1226 | // The number of PLT entries. |
1227 | unsigned int count_; | |
3a531937 JY |
1228 | |
1229 | // Number of PLT entries with R_X86_64_IRELATIVE relocs. These | |
1230 | // follow the regular PLT entries. | |
1231 | unsigned int irelative_count_; | |
1232 | ||
1233 | // GOT offset of the reserved TLSDESC_GOT entry for the lazy trampoline. | |
1234 | // Communicated to the loader via DT_TLSDESC_GOT. The magic value -1 | |
1235 | // indicates an offset is not allocated. | |
1236 | unsigned int tlsdesc_got_offset_; | |
053a4d68 JY |
1237 | }; |
1238 | ||
1239 | // Initialize the PLT section. | |
1240 | ||
1241 | template<int size, bool big_endian> | |
1242 | void | |
1243 | Output_data_plt_aarch64<size, big_endian>::init(Layout* layout) | |
1244 | { | |
1245 | this->rel_ = new Reloc_section(false); | |
1246 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1247 | elfcpp::SHF_ALLOC, this->rel_, | |
1248 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1249 | } | |
1250 | ||
1251 | template<int size, bool big_endian> | |
1252 | void | |
1253 | Output_data_plt_aarch64<size, big_endian>::do_adjust_output_section( | |
1254 | Output_section* os) | |
1255 | { | |
1256 | os->set_entsize(this->get_plt_entry_size()); | |
1257 | } | |
1258 | ||
1259 | // Add an entry to the PLT. | |
1260 | ||
1261 | template<int size, bool big_endian> | |
1262 | void | |
1263 | Output_data_plt_aarch64<size, big_endian>::add_entry(Symbol* gsym) | |
1264 | { | |
1265 | gold_assert(!gsym->has_plt_offset()); | |
9363c7c3 JY |
1266 | |
1267 | gsym->set_plt_offset((this->count_) * this->get_plt_entry_size() | |
1268 | + this->first_plt_entry_offset()); | |
1269 | ||
1270 | ++this->count_; | |
1271 | ||
1272 | section_offset_type got_offset = this->got_plt_->current_data_size(); | |
1273 | ||
1274 | // Every PLT entry needs a GOT entry which points back to the PLT | |
1275 | // entry (this will be changed by the dynamic linker, normally | |
1276 | // lazily when the function is called). | |
1277 | this->got_plt_->set_current_data_size(got_offset + size / 8); | |
1278 | ||
1279 | // Every PLT entry needs a reloc. | |
1280 | gsym->set_needs_dynsym_entry(); | |
1281 | this->rel_->add_global(gsym, elfcpp::R_AARCH64_JUMP_SLOT, | |
1282 | this->got_plt_, got_offset, 0); | |
1283 | ||
1284 | // Note that we don't need to save the symbol. The contents of the | |
1285 | // PLT are independent of which symbols are used. The symbols only | |
1286 | // appear in the relocations. | |
1287 | } | |
1288 | ||
3a531937 JY |
1289 | // Return where the TLSDESC relocations should go, creating it if |
1290 | // necessary. These follow the JUMP_SLOT relocations. | |
1291 | ||
1292 | template<int size, bool big_endian> | |
1293 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
1294 | Output_data_plt_aarch64<size, big_endian>::rela_tlsdesc(Layout* layout) | |
1295 | { | |
1296 | if (this->tlsdesc_rel_ == NULL) | |
1297 | { | |
1298 | this->tlsdesc_rel_ = new Reloc_section(false); | |
1299 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1300 | elfcpp::SHF_ALLOC, this->tlsdesc_rel_, | |
1301 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1302 | gold_assert(this->tlsdesc_rel_->output_section() | |
1303 | == this->rel_->output_section()); | |
1304 | } | |
1305 | return this->tlsdesc_rel_; | |
1306 | } | |
1307 | ||
1308 | // Return where the IRELATIVE relocations should go in the PLT. These | |
1309 | // follow the JUMP_SLOT and the TLSDESC relocations. | |
1310 | ||
1311 | template<int size, bool big_endian> | |
1312 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
1313 | Output_data_plt_aarch64<size, big_endian>::rela_irelative(Symbol_table* symtab, | |
1314 | Layout* layout) | |
1315 | { | |
1316 | if (this->irelative_rel_ == NULL) | |
1317 | { | |
1318 | // Make sure we have a place for the TLSDESC relocations, in | |
1319 | // case we see any later on. | |
1320 | this->rela_tlsdesc(layout); | |
1321 | this->irelative_rel_ = new Reloc_section(false); | |
1322 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
1323 | elfcpp::SHF_ALLOC, this->irelative_rel_, | |
1324 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
1325 | gold_assert(this->irelative_rel_->output_section() | |
1326 | == this->rel_->output_section()); | |
1327 | ||
1328 | if (parameters->doing_static_link()) | |
1329 | { | |
1330 | // A statically linked executable will only have a .rela.plt | |
1331 | // section to hold R_AARCH64_IRELATIVE relocs for | |
1332 | // STT_GNU_IFUNC symbols. The library will use these | |
1333 | // symbols to locate the IRELATIVE relocs at program startup | |
1334 | // time. | |
1335 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
1336 | Symbol_table::PREDEFINED, | |
1337 | this->irelative_rel_, 0, 0, | |
1338 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
1339 | elfcpp::STV_HIDDEN, 0, false, true); | |
1340 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
1341 | Symbol_table::PREDEFINED, | |
1342 | this->irelative_rel_, 0, 0, | |
1343 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
1344 | elfcpp::STV_HIDDEN, 0, true, true); | |
1345 | } | |
1346 | } | |
1347 | return this->irelative_rel_; | |
1348 | } | |
1349 | ||
9363c7c3 JY |
1350 | // Return the PLT address to use for a global symbol. |
1351 | ||
1352 | template<int size, bool big_endian> | |
1353 | uint64_t | |
1354 | Output_data_plt_aarch64<size, big_endian>::address_for_global( | |
1355 | const Symbol* gsym) | |
1356 | { | |
1357 | uint64_t offset = 0; | |
1358 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
1359 | && gsym->can_use_relative_reloc(false)) | |
1360 | offset = (this->first_plt_entry_offset() + | |
1361 | this->count_ * this->get_plt_entry_size()); | |
1362 | return this->address() + offset + gsym->plt_offset(); | |
1363 | } | |
1364 | ||
1365 | // Return the PLT address to use for a local symbol. These are always | |
1366 | // IRELATIVE relocs. | |
1367 | ||
1368 | template<int size, bool big_endian> | |
1369 | uint64_t | |
1370 | Output_data_plt_aarch64<size, big_endian>::address_for_local( | |
1371 | const Relobj* object, | |
1372 | unsigned int r_sym) | |
1373 | { | |
1374 | return (this->address() | |
1375 | + this->first_plt_entry_offset() | |
1376 | + this->count_ * this->get_plt_entry_size() | |
1377 | + object->local_plt_offset(r_sym)); | |
053a4d68 JY |
1378 | } |
1379 | ||
1380 | // Set the final size. | |
9363c7c3 | 1381 | |
053a4d68 JY |
1382 | template<int size, bool big_endian> |
1383 | void | |
1384 | Output_data_plt_aarch64<size, big_endian>::set_final_data_size() | |
1385 | { | |
3a531937 JY |
1386 | unsigned int count = this->count_ + this->irelative_count_; |
1387 | unsigned int extra_size = 0; | |
1388 | if (this->has_tlsdesc_entry()) | |
1389 | extra_size += this->get_plt_tlsdesc_entry_size(); | |
053a4d68 | 1390 | this->set_data_size(this->first_plt_entry_offset() |
3a531937 JY |
1391 | + count * this->get_plt_entry_size() |
1392 | + extra_size); | |
053a4d68 JY |
1393 | } |
1394 | ||
1395 | template<int size, bool big_endian> | |
1396 | class Output_data_plt_aarch64_standard : | |
1397 | public Output_data_plt_aarch64<size, big_endian> | |
1398 | { | |
1399 | public: | |
1400 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3a531937 JY |
1401 | Output_data_plt_aarch64_standard( |
1402 | Layout* layout, | |
1403 | Output_data_got_aarch64<size, big_endian>* got, | |
1404 | Output_data_space* got_plt, | |
1405 | Output_data_space* got_irelative) | |
053a4d68 | 1406 | : Output_data_plt_aarch64<size, big_endian>(layout, |
9363c7c3 | 1407 | size == 32 ? 4 : 8, |
3a531937 JY |
1408 | got, got_plt, |
1409 | got_irelative) | |
053a4d68 JY |
1410 | { } |
1411 | ||
1412 | protected: | |
1413 | // Return the offset of the first non-reserved PLT entry. | |
1414 | virtual unsigned int | |
1415 | do_first_plt_entry_offset() const | |
1416 | { return this->first_plt_entry_size; } | |
1417 | ||
1418 | // Return the size of a PLT entry | |
1419 | virtual unsigned int | |
1420 | do_get_plt_entry_size() const | |
1421 | { return this->plt_entry_size; } | |
1422 | ||
3a531937 JY |
1423 | // Return the size of a tlsdesc entry |
1424 | virtual unsigned int | |
1425 | do_get_plt_tlsdesc_entry_size() const | |
1426 | { return this->plt_tlsdesc_entry_size; } | |
1427 | ||
053a4d68 JY |
1428 | virtual void |
1429 | do_fill_first_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
1430 | Address got_address, |
1431 | Address plt_address); | |
053a4d68 JY |
1432 | |
1433 | virtual void | |
1434 | do_fill_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
1435 | Address got_address, |
1436 | Address plt_address, | |
1437 | unsigned int got_offset, | |
1438 | unsigned int plt_offset); | |
053a4d68 | 1439 | |
3a531937 JY |
1440 | virtual void |
1441 | do_fill_tlsdesc_entry(unsigned char* pov, | |
1442 | Address gotplt_address, | |
1443 | Address plt_address, | |
1444 | Address got_base, | |
1445 | unsigned int tlsdesc_got_offset, | |
1446 | unsigned int plt_offset); | |
1447 | ||
053a4d68 JY |
1448 | private: |
1449 | // The size of the first plt entry size. | |
1450 | static const int first_plt_entry_size = 32; | |
1451 | // The size of the plt entry size. | |
1452 | static const int plt_entry_size = 16; | |
3a531937 JY |
1453 | // The size of the plt tlsdesc entry size. |
1454 | static const int plt_tlsdesc_entry_size = 32; | |
053a4d68 JY |
1455 | // Template for the first PLT entry. |
1456 | static const uint32_t first_plt_entry[first_plt_entry_size / 4]; | |
1457 | // Template for subsequent PLT entries. | |
1458 | static const uint32_t plt_entry[plt_entry_size / 4]; | |
3a531937 JY |
1459 | // The reserved TLSDESC entry in the PLT for an executable. |
1460 | static const uint32_t tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4]; | |
053a4d68 JY |
1461 | }; |
1462 | ||
1463 | // The first entry in the PLT for an executable. | |
1464 | ||
1465 | template<> | |
1466 | const uint32_t | |
1467 | Output_data_plt_aarch64_standard<32, false>:: | |
1468 | first_plt_entry[first_plt_entry_size / 4] = | |
1469 | { | |
1470 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
1471 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
1472 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
1473 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
1474 | 0xd61f0220, /* br x17 */ | |
1475 | 0xd503201f, /* nop */ | |
1476 | 0xd503201f, /* nop */ | |
1477 | 0xd503201f, /* nop */ | |
1478 | }; | |
1479 | ||
1480 | template<> | |
1481 | const uint32_t | |
1482 | Output_data_plt_aarch64_standard<32, true>:: | |
1483 | first_plt_entry[first_plt_entry_size / 4] = | |
1484 | { | |
1485 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
1486 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
1487 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
1488 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
1489 | 0xd61f0220, /* br x17 */ | |
1490 | 0xd503201f, /* nop */ | |
1491 | 0xd503201f, /* nop */ | |
1492 | 0xd503201f, /* nop */ | |
1493 | }; | |
1494 | ||
1495 | template<> | |
1496 | const uint32_t | |
1497 | Output_data_plt_aarch64_standard<64, false>:: | |
1498 | first_plt_entry[first_plt_entry_size / 4] = | |
1499 | { | |
1500 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
1501 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
1502 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
1503 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
1504 | 0xd61f0220, /* br x17 */ | |
1505 | 0xd503201f, /* nop */ | |
1506 | 0xd503201f, /* nop */ | |
1507 | 0xd503201f, /* nop */ | |
1508 | }; | |
1509 | ||
1510 | template<> | |
1511 | const uint32_t | |
1512 | Output_data_plt_aarch64_standard<64, true>:: | |
1513 | first_plt_entry[first_plt_entry_size / 4] = | |
1514 | { | |
1515 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
1516 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
1517 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
1518 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
1519 | 0xd61f0220, /* br x17 */ | |
1520 | 0xd503201f, /* nop */ | |
1521 | 0xd503201f, /* nop */ | |
1522 | 0xd503201f, /* nop */ | |
1523 | }; | |
1524 | ||
1525 | template<> | |
1526 | const uint32_t | |
1527 | Output_data_plt_aarch64_standard<32, false>:: | |
1528 | plt_entry[plt_entry_size / 4] = | |
1529 | { | |
1530 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
1531 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
1532 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
1533 | 0xd61f0220, /* br x17. */ | |
1534 | }; | |
1535 | ||
1536 | template<> | |
1537 | const uint32_t | |
1538 | Output_data_plt_aarch64_standard<32, true>:: | |
1539 | plt_entry[plt_entry_size / 4] = | |
1540 | { | |
1541 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
1542 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
1543 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
1544 | 0xd61f0220, /* br x17. */ | |
1545 | }; | |
1546 | ||
1547 | template<> | |
1548 | const uint32_t | |
1549 | Output_data_plt_aarch64_standard<64, false>:: | |
1550 | plt_entry[plt_entry_size / 4] = | |
1551 | { | |
1552 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
1553 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
1554 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
1555 | 0xd61f0220, /* br x17. */ | |
1556 | }; | |
1557 | ||
1558 | template<> | |
1559 | const uint32_t | |
1560 | Output_data_plt_aarch64_standard<64, true>:: | |
1561 | plt_entry[plt_entry_size / 4] = | |
1562 | { | |
1563 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
1564 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
1565 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
1566 | 0xd61f0220, /* br x17. */ | |
1567 | }; | |
1568 | ||
1569 | template<int size, bool big_endian> | |
1570 | void | |
1571 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_first_plt_entry( | |
1572 | unsigned char* pov, | |
9363c7c3 JY |
1573 | Address got_address, |
1574 | Address plt_address) | |
053a4d68 JY |
1575 | { |
1576 | // PLT0 of the small PLT looks like this in ELF64 - | |
1577 | // stp x16, x30, [sp, #-16]! Save the reloc and lr on stack. | |
1578 | // adrp x16, PLT_GOT + 16 Get the page base of the GOTPLT | |
1579 | // ldr x17, [x16, #:lo12:PLT_GOT+16] Load the address of the | |
1580 | // symbol resolver | |
1581 | // add x16, x16, #:lo12:PLT_GOT+16 Load the lo12 bits of the | |
1582 | // GOTPLT entry for this. | |
1583 | // br x17 | |
1584 | // PLT0 will be slightly different in ELF32 due to different got entry | |
1585 | // size. | |
1586 | memcpy(pov, this->first_plt_entry, this->first_plt_entry_size); | |
9363c7c3 JY |
1587 | Address gotplt_2nd_ent = got_address + (size / 8) * 2; |
1588 | ||
1589 | // Fill in the top 21 bits for this: ADRP x16, PLT_GOT + 8 * 2. | |
1590 | // ADRP: (PG(S+A)-PG(P)) >> 12) & 0x1fffff. | |
1591 | // FIXME: This only works for 64bit | |
1592 | AArch64_relocate_functions<size, big_endian>::adrp(pov + 4, | |
1593 | gotplt_2nd_ent, plt_address + 4); | |
1594 | ||
1595 | // Fill in R_AARCH64_LDST8_LO12 | |
1596 | elfcpp::Swap<32, big_endian>::writeval( | |
1597 | pov + 8, | |
1598 | ((this->first_plt_entry[2] & 0xffc003ff) | |
1599 | | ((gotplt_2nd_ent & 0xff8) << 7))); | |
1600 | ||
1601 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
1602 | elfcpp::Swap<32, big_endian>::writeval( | |
1603 | pov + 12, | |
1604 | ((this->first_plt_entry[3] & 0xffc003ff) | |
1605 | | ((gotplt_2nd_ent & 0xfff) << 10))); | |
053a4d68 JY |
1606 | } |
1607 | ||
1608 | // Subsequent entries in the PLT for an executable. | |
9363c7c3 | 1609 | // FIXME: This only works for 64bit |
053a4d68 JY |
1610 | |
1611 | template<int size, bool big_endian> | |
1612 | void | |
1613 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_plt_entry( | |
1614 | unsigned char* pov, | |
9363c7c3 JY |
1615 | Address got_address, |
1616 | Address plt_address, | |
1617 | unsigned int got_offset, | |
1618 | unsigned int plt_offset) | |
053a4d68 JY |
1619 | { |
1620 | memcpy(pov, this->plt_entry, this->plt_entry_size); | |
9363c7c3 JY |
1621 | |
1622 | Address gotplt_entry_address = got_address + got_offset; | |
1623 | Address plt_entry_address = plt_address + plt_offset; | |
1624 | ||
1625 | // Fill in R_AARCH64_PCREL_ADR_HI21 | |
1626 | AArch64_relocate_functions<size, big_endian>::adrp( | |
1627 | pov, | |
1628 | gotplt_entry_address, | |
1629 | plt_entry_address); | |
1630 | ||
1631 | // Fill in R_AARCH64_LDST64_ABS_LO12 | |
1632 | elfcpp::Swap<32, big_endian>::writeval( | |
1633 | pov + 4, | |
1634 | ((this->plt_entry[1] & 0xffc003ff) | |
1635 | | ((gotplt_entry_address & 0xff8) << 7))); | |
1636 | ||
1637 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
1638 | elfcpp::Swap<32, big_endian>::writeval( | |
1639 | pov + 8, | |
1640 | ((this->plt_entry[2] & 0xffc003ff) | |
1641 | | ((gotplt_entry_address & 0xfff) <<10))); | |
1642 | ||
053a4d68 JY |
1643 | } |
1644 | ||
3a531937 JY |
1645 | |
1646 | template<> | |
1647 | const uint32_t | |
1648 | Output_data_plt_aarch64_standard<32, false>:: | |
1649 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
1650 | { | |
1651 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
1652 | 0x90000002, /* adrp x2, 0 */ | |
1653 | 0x90000003, /* adrp x3, 0 */ | |
1654 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
1655 | 0x11000063, /* add w3, w3, 0 */ | |
1656 | 0xd61f0040, /* br x2 */ | |
1657 | 0xd503201f, /* nop */ | |
1658 | 0xd503201f, /* nop */ | |
1659 | }; | |
1660 | ||
1661 | template<> | |
1662 | const uint32_t | |
1663 | Output_data_plt_aarch64_standard<32, true>:: | |
1664 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
1665 | { | |
1666 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
1667 | 0x90000002, /* adrp x2, 0 */ | |
1668 | 0x90000003, /* adrp x3, 0 */ | |
1669 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
1670 | 0x11000063, /* add w3, w3, 0 */ | |
1671 | 0xd61f0040, /* br x2 */ | |
1672 | 0xd503201f, /* nop */ | |
1673 | 0xd503201f, /* nop */ | |
1674 | }; | |
1675 | ||
1676 | template<> | |
1677 | const uint32_t | |
1678 | Output_data_plt_aarch64_standard<64, false>:: | |
1679 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
1680 | { | |
1681 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
1682 | 0x90000002, /* adrp x2, 0 */ | |
1683 | 0x90000003, /* adrp x3, 0 */ | |
1684 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
1685 | 0x91000063, /* add x3, x3, 0 */ | |
1686 | 0xd61f0040, /* br x2 */ | |
1687 | 0xd503201f, /* nop */ | |
1688 | 0xd503201f, /* nop */ | |
1689 | }; | |
1690 | ||
1691 | template<> | |
1692 | const uint32_t | |
1693 | Output_data_plt_aarch64_standard<64, true>:: | |
1694 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
1695 | { | |
1696 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
1697 | 0x90000002, /* adrp x2, 0 */ | |
1698 | 0x90000003, /* adrp x3, 0 */ | |
1699 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
1700 | 0x91000063, /* add x3, x3, 0 */ | |
1701 | 0xd61f0040, /* br x2 */ | |
1702 | 0xd503201f, /* nop */ | |
1703 | 0xd503201f, /* nop */ | |
1704 | }; | |
1705 | ||
1706 | template<int size, bool big_endian> | |
1707 | void | |
1708 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_tlsdesc_entry( | |
1709 | unsigned char* pov, | |
1710 | Address gotplt_address, | |
1711 | Address plt_address, | |
1712 | Address got_base, | |
1713 | unsigned int tlsdesc_got_offset, | |
1714 | unsigned int plt_offset) | |
1715 | { | |
1716 | memcpy(pov, tlsdesc_plt_entry, plt_tlsdesc_entry_size); | |
1717 | ||
1718 | // move DT_TLSDESC_GOT address into x2 | |
1719 | // move .got.plt address into x3 | |
1720 | Address tlsdesc_got_entry = got_base + tlsdesc_got_offset; | |
1721 | Address plt_entry_address = plt_address + plt_offset; | |
1722 | ||
1723 | // R_AARCH64_ADR_PREL_PG_HI21 | |
1724 | AArch64_relocate_functions<size, big_endian>::adrp( | |
1725 | pov + 4, | |
1726 | tlsdesc_got_entry, | |
1727 | plt_entry_address + 4); | |
1728 | ||
1729 | // R_AARCH64_ADR_PREL_PG_HI21 | |
1730 | AArch64_relocate_functions<size, big_endian>::adrp( | |
1731 | pov + 8, | |
1732 | gotplt_address, | |
1733 | plt_entry_address + 8); | |
1734 | ||
1735 | // R_AARCH64_LDST64_ABS_LO12 | |
1736 | elfcpp::Swap<32, big_endian>::writeval( | |
1737 | pov + 12, | |
1738 | ((this->tlsdesc_plt_entry[3] & 0xffc003ff) | |
1739 | | ((tlsdesc_got_entry & 0xff8) << 7))); | |
1740 | ||
1741 | // R_AARCH64_ADD_ABS_LO12 | |
1742 | elfcpp::Swap<32, big_endian>::writeval( | |
1743 | pov + 16, | |
1744 | ((this->tlsdesc_plt_entry[4] & 0xffc003ff) | |
1745 | | ((gotplt_address & 0xfff) << 10))); | |
1746 | } | |
1747 | ||
053a4d68 JY |
1748 | // Write out the PLT. This uses the hand-coded instructions above, |
1749 | // and adjusts them as needed. This is specified by the AMD64 ABI. | |
1750 | ||
1751 | template<int size, bool big_endian> | |
1752 | void | |
1753 | Output_data_plt_aarch64<size, big_endian>::do_write(Output_file* of) | |
1754 | { | |
1755 | const off_t offset = this->offset(); | |
1756 | const section_size_type oview_size = | |
1757 | convert_to_section_size_type(this->data_size()); | |
1758 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1759 | ||
1760 | const off_t got_file_offset = this->got_plt_->offset(); | |
1761 | const section_size_type got_size = | |
1762 | convert_to_section_size_type(this->got_plt_->data_size()); | |
1763 | unsigned char* const got_view = of->get_output_view(got_file_offset, | |
1764 | got_size); | |
1765 | ||
1766 | unsigned char* pov = oview; | |
1767 | ||
1768 | // The base address of the .plt section. | |
1769 | typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address(); | |
053a4d68 | 1770 | // The base address of the PLT portion of the .got section. |
3a531937 JY |
1771 | typename elfcpp::Elf_types<size>::Elf_Addr gotplt_address |
1772 | = this->got_plt_->address(); | |
053a4d68 | 1773 | |
3a531937 | 1774 | this->fill_first_plt_entry(pov, gotplt_address, plt_address); |
053a4d68 JY |
1775 | pov += this->first_plt_entry_offset(); |
1776 | ||
1777 | // The first three entries in .got.plt are reserved. | |
1778 | unsigned char* got_pov = got_view; | |
1779 | memset(got_pov, 0, size / 8 * AARCH64_GOTPLT_RESERVE_COUNT); | |
1780 | got_pov += (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
1781 | ||
1782 | unsigned int plt_offset = this->first_plt_entry_offset(); | |
1783 | unsigned int got_offset = (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
3a531937 | 1784 | const unsigned int count = this->count_ + this->irelative_count_; |
053a4d68 JY |
1785 | for (unsigned int plt_index = 0; |
1786 | plt_index < count; | |
1787 | ++plt_index, | |
1788 | pov += this->get_plt_entry_size(), | |
1789 | got_pov += size / 8, | |
1790 | plt_offset += this->get_plt_entry_size(), | |
1791 | got_offset += size / 8) | |
1792 | { | |
1793 | // Set and adjust the PLT entry itself. | |
3a531937 | 1794 | this->fill_plt_entry(pov, gotplt_address, plt_address, |
9363c7c3 | 1795 | got_offset, plt_offset); |
053a4d68 | 1796 | |
9363c7c3 JY |
1797 | // Set the entry in the GOT, which points to plt0. |
1798 | elfcpp::Swap<size, big_endian>::writeval(got_pov, plt_address); | |
053a4d68 JY |
1799 | } |
1800 | ||
3a531937 JY |
1801 | if (this->has_tlsdesc_entry()) |
1802 | { | |
1803 | // Set and adjust the reserved TLSDESC PLT entry. | |
1804 | unsigned int tlsdesc_got_offset = this->get_tlsdesc_got_offset(); | |
1805 | // The base address of the .base section. | |
1806 | typename elfcpp::Elf_types<size>::Elf_Addr got_base = | |
1807 | this->got_->address(); | |
1808 | this->fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
1809 | tlsdesc_got_offset, plt_offset); | |
1810 | pov += this->get_plt_tlsdesc_entry_size(); | |
1811 | } | |
1812 | ||
053a4d68 JY |
1813 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
1814 | gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size); | |
1815 | ||
1816 | of->write_output_view(offset, oview_size, oview); | |
1817 | of->write_output_view(got_file_offset, got_size, got_view); | |
1818 | } | |
1819 | ||
9363c7c3 JY |
1820 | // Telling how to update the immediate field of an instruction. |
1821 | struct AArch64_howto | |
1822 | { | |
1823 | // The immediate field mask. | |
1824 | elfcpp::Elf_Xword dst_mask; | |
1825 | ||
1826 | // The offset to apply relocation immediate | |
1827 | int doffset; | |
1828 | ||
1829 | // The second part offset, if the immediate field has two parts. | |
1830 | // -1 if the immediate field has only one part. | |
1831 | int doffset2; | |
1832 | }; | |
1833 | ||
1834 | static const AArch64_howto aarch64_howto[AArch64_reloc_property::INST_NUM] = | |
1835 | { | |
1836 | {0, -1, -1}, // DATA | |
1837 | {0x1fffe0, 5, -1}, // MOVW [20:5]-imm16 | |
1838 | {0xffffe0, 5, -1}, // LD [23:5]-imm19 | |
1839 | {0x60ffffe0, 29, 5}, // ADR [30:29]-immlo [23:5]-immhi | |
1840 | {0x60ffffe0, 29, 5}, // ADRP [30:29]-immlo [23:5]-immhi | |
1841 | {0x3ffc00, 10, -1}, // ADD [21:10]-imm12 | |
1842 | {0x3ffc00, 10, -1}, // LDST [21:10]-imm12 | |
1843 | {0x7ffe0, 5, -1}, // TBZNZ [18:5]-imm14 | |
1844 | {0xffffe0, 5, -1}, // CONDB [23:5]-imm19 | |
1845 | {0x3ffffff, 0, -1}, // B [25:0]-imm26 | |
1846 | {0x3ffffff, 0, -1}, // CALL [25:0]-imm26 | |
1847 | }; | |
1848 | ||
1849 | // AArch64 relocate function class | |
1850 | ||
1851 | template<int size, bool big_endian> | |
1852 | class AArch64_relocate_functions | |
1853 | { | |
1854 | public: | |
1855 | typedef enum | |
1856 | { | |
1857 | STATUS_OKAY, // No error during relocation. | |
1858 | STATUS_OVERFLOW, // Relocation overflow. | |
1859 | STATUS_BAD_RELOC, // Relocation cannot be applied. | |
1860 | } Status; | |
1861 | ||
1862 | private: | |
1863 | typedef AArch64_relocate_functions<size, big_endian> This; | |
1864 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1865 | ||
1866 | // Return the page address of the address. | |
1867 | // Page(address) = address & ~0xFFF | |
1868 | ||
1869 | static inline typename elfcpp::Swap<size, big_endian>::Valtype | |
1870 | Page(Address address) | |
1871 | { | |
1872 | return (address & (~static_cast<Address>(0xFFF))); | |
1873 | } | |
1874 | ||
1875 | // Update instruction (pointed by view) with selected bits (immed). | |
1876 | // val = (val & ~dst_mask) | (immed << doffset) | |
1877 | ||
1878 | template<int valsize> | |
1879 | static inline void | |
1880 | update_view(unsigned char* view, | |
1881 | typename elfcpp::Swap<size, big_endian>::Valtype immed, | |
1882 | elfcpp::Elf_Xword doffset, | |
1883 | elfcpp::Elf_Xword dst_mask) | |
1884 | { | |
1885 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1886 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1887 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
1888 | ||
1889 | // Clear immediate fields. | |
1890 | val &= ~dst_mask; | |
1891 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
1892 | static_cast<Valtype>(val | (immed << doffset))); | |
1893 | } | |
1894 | ||
1895 | // Update two parts of an instruction (pointed by view) with selected | |
1896 | // bits (immed1 and immed2). | |
1897 | // val = (val & ~dst_mask) | (immed1 << doffset1) | (immed2 << doffset2) | |
1898 | ||
1899 | template<int valsize> | |
1900 | static inline void | |
1901 | update_view_two_parts( | |
1902 | unsigned char* view, | |
1903 | typename elfcpp::Swap<size, big_endian>::Valtype immed1, | |
1904 | typename elfcpp::Swap<size, big_endian>::Valtype immed2, | |
1905 | elfcpp::Elf_Xword doffset1, | |
1906 | elfcpp::Elf_Xword doffset2, | |
1907 | elfcpp::Elf_Xword dst_mask) | |
1908 | { | |
1909 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
1910 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1911 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
1912 | val &= ~dst_mask; | |
1913 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
1914 | static_cast<Valtype>(val | (immed1 << doffset1) | | |
1915 | (immed2 << doffset2))); | |
1916 | } | |
1917 | ||
1918 | // Update adr or adrp instruction with [32:12] of X. | |
1919 | // In adr and adrp: [30:29] immlo [23:5] immhi | |
1920 | ||
1921 | static inline void | |
1922 | update_adr(unsigned char* view, | |
1923 | typename elfcpp::Swap<size, big_endian>::Valtype x, | |
1924 | const AArch64_reloc_property* /* reloc_property */) | |
1925 | { | |
1926 | elfcpp::Elf_Xword dst_mask = (0x3 << 29) | (0x7ffff << 5); | |
1927 | typename elfcpp::Swap<32, big_endian>::Valtype immed = | |
1928 | (x >> 12) & 0x1fffff; | |
1929 | This::template update_view_two_parts<32>( | |
1930 | view, | |
1931 | immed & 0x3, | |
1932 | (immed & 0x1ffffc) >> 2, | |
1933 | 29, | |
1934 | 5, | |
1935 | dst_mask); | |
1936 | } | |
1937 | ||
3a531937 JY |
1938 | // Update movz/movn instruction with bits immed. |
1939 | // Set instruction to movz if is_movz is true, otherwise set instruction | |
1940 | // to movn. | |
1941 | static inline void | |
1942 | update_movnz(unsigned char* view, | |
1943 | typename elfcpp::Swap<size, big_endian>::Valtype immed, | |
1944 | bool is_movz) | |
1945 | { | |
1946 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
1947 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1948 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
1949 | ||
1950 | const elfcpp::Elf_Xword doffset = | |
1951 | aarch64_howto[AArch64_reloc_property::INST_MOVW].doffset; | |
1952 | const elfcpp::Elf_Xword dst_mask = | |
1953 | aarch64_howto[AArch64_reloc_property::INST_MOVW].dst_mask; | |
1954 | ||
1955 | // Clear immediate fields and opc code. | |
1956 | val &= ~(dst_mask | (0x11 << 29)); | |
1957 | ||
1958 | // Set instruction to movz or movn. | |
1959 | // movz: [30:29] is 10 movn: [30:29] is 00 | |
1960 | if (is_movz) | |
1961 | val |= (0x10 << 29); | |
1962 | ||
1963 | elfcpp::Swap<32, big_endian>::writeval(wv, | |
1964 | static_cast<Valtype>(val | (immed << doffset))); | |
1965 | } | |
1966 | ||
9363c7c3 JY |
1967 | public: |
1968 | ||
1969 | // Do a simple rela relocation at unaligned addresses. | |
1970 | ||
1971 | template<int valsize> | |
1972 | static inline typename This::Status | |
1973 | rela_ua(unsigned char* view, | |
1974 | const Sized_relobj_file<size, big_endian>* object, | |
1975 | const Symbol_value<size>* psymval, | |
1976 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
1977 | const AArch64_reloc_property* reloc_property) | |
1978 | { | |
1979 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
1980 | Valtype; | |
1981 | typename elfcpp::Elf_types<size>::Elf_Addr x = | |
1982 | psymval->value(object, addend); | |
1983 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, | |
1984 | static_cast<Valtype>(x)); | |
1985 | return (reloc_property->checkup_x_value(x) | |
1986 | ? This::STATUS_OKAY | |
1987 | : This::STATUS_OVERFLOW); | |
1988 | } | |
1989 | ||
1990 | // Do a simple pc-relative relocation at unaligned addresses. | |
1991 | ||
1992 | template<int valsize> | |
1993 | static inline typename This::Status | |
1994 | pcrela_ua(unsigned char* view, | |
1995 | const Sized_relobj_file<size, big_endian>* object, | |
1996 | const Symbol_value<size>* psymval, | |
1997 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
1998 | Address address, | |
1999 | const AArch64_reloc_property* reloc_property) | |
2000 | { | |
2001 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
2002 | Valtype; | |
3a531937 | 2003 | Address x = psymval->value(object, addend) - address; |
9363c7c3 JY |
2004 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, |
2005 | static_cast<Valtype>(x)); | |
2006 | return (reloc_property->checkup_x_value(x) | |
2007 | ? This::STATUS_OKAY | |
2008 | : This::STATUS_OVERFLOW); | |
2009 | } | |
2010 | ||
2011 | // Do a simple rela relocation at aligned addresses. | |
2012 | ||
2013 | template<int valsize> | |
2014 | static inline typename This::Status | |
2015 | rela( | |
2016 | unsigned char* view, | |
2017 | const Sized_relobj_file<size, big_endian>* object, | |
2018 | const Symbol_value<size>* psymval, | |
2019 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
2020 | const AArch64_reloc_property* reloc_property) | |
2021 | { | |
2022 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype | |
2023 | Valtype; | |
2024 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
3a531937 | 2025 | Address x = psymval->value(object, addend); |
9363c7c3 JY |
2026 | elfcpp::Swap<valsize, big_endian>::writeval(wv, |
2027 | static_cast<Valtype>(x)); | |
2028 | return (reloc_property->checkup_x_value(x) | |
2029 | ? This::STATUS_OKAY | |
2030 | : This::STATUS_OVERFLOW); | |
2031 | } | |
2032 | ||
2033 | // Do relocate. Update selected bits in text. | |
2034 | // new_val = (val & ~dst_mask) | (immed << doffset) | |
2035 | ||
2036 | template<int valsize> | |
2037 | static inline typename This::Status | |
2038 | rela_general(unsigned char* view, | |
2039 | const Sized_relobj_file<size, big_endian>* object, | |
2040 | const Symbol_value<size>* psymval, | |
2041 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
2042 | const AArch64_reloc_property* reloc_property) | |
2043 | { | |
2044 | // Calculate relocation. | |
2045 | Address x = psymval->value(object, addend); | |
2046 | ||
2047 | // Select bits from X. | |
2048 | Address immed = reloc_property->select_x_value(x); | |
2049 | ||
2050 | // Update view. | |
2051 | const AArch64_reloc_property::Reloc_inst inst = | |
3a531937 | 2052 | reloc_property->reloc_inst(); |
9363c7c3 JY |
2053 | // If it is a data relocation or instruction has 2 parts of immediate |
2054 | // fields, you should not call rela_general. | |
2055 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
2056 | aarch64_howto[inst].doffset != -1); | |
2057 | This::template update_view<valsize>(view, immed, | |
2058 | aarch64_howto[inst].doffset, | |
2059 | aarch64_howto[inst].dst_mask); | |
2060 | ||
2061 | // Do check overflow or alignment if needed. | |
2062 | return (reloc_property->checkup_x_value(x) | |
2063 | ? This::STATUS_OKAY | |
2064 | : This::STATUS_OVERFLOW); | |
2065 | } | |
2066 | ||
2067 | // Do relocate. Update selected bits in text. | |
2068 | // new val = (val & ~dst_mask) | (immed << doffset) | |
2069 | ||
2070 | template<int valsize> | |
2071 | static inline typename This::Status | |
2072 | rela_general( | |
2073 | unsigned char* view, | |
2074 | typename elfcpp::Swap<size, big_endian>::Valtype s, | |
2075 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
2076 | const AArch64_reloc_property* reloc_property) | |
2077 | { | |
2078 | // Calculate relocation. | |
2079 | Address x = s + addend; | |
2080 | ||
2081 | // Select bits from X. | |
2082 | Address immed = reloc_property->select_x_value(x); | |
2083 | ||
2084 | // Update view. | |
2085 | const AArch64_reloc_property::Reloc_inst inst = | |
3a531937 | 2086 | reloc_property->reloc_inst(); |
9363c7c3 JY |
2087 | // If it is a data relocation or instruction has 2 parts of immediate |
2088 | // fields, you should not call rela_general. | |
2089 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
2090 | aarch64_howto[inst].doffset != -1); | |
2091 | This::template update_view<valsize>(view, immed, | |
2092 | aarch64_howto[inst].doffset, | |
2093 | aarch64_howto[inst].dst_mask); | |
2094 | ||
2095 | // Do check overflow or alignment if needed. | |
2096 | return (reloc_property->checkup_x_value(x) | |
2097 | ? This::STATUS_OKAY | |
2098 | : This::STATUS_OVERFLOW); | |
2099 | } | |
2100 | ||
2101 | // Do address relative relocate. Update selected bits in text. | |
2102 | // new val = (val & ~dst_mask) | (immed << doffset) | |
2103 | ||
2104 | template<int valsize> | |
2105 | static inline typename This::Status | |
2106 | pcrela_general( | |
2107 | unsigned char* view, | |
2108 | const Sized_relobj_file<size, big_endian>* object, | |
2109 | const Symbol_value<size>* psymval, | |
2110 | typename elfcpp::Swap<size, big_endian>::Valtype addend, | |
2111 | Address address, | |
2112 | const AArch64_reloc_property* reloc_property) | |
2113 | { | |
2114 | // Calculate relocation. | |
3a531937 | 2115 | Address x = psymval->value(object, addend) - address; |
9363c7c3 JY |
2116 | |
2117 | // Select bits from X. | |
2118 | Address immed = reloc_property->select_x_value(x); | |
2119 | ||
2120 | // Update view. | |
2121 | const AArch64_reloc_property::Reloc_inst inst = | |
2122 | reloc_property->reloc_inst(); | |
2123 | // If it is a data relocation or instruction has 2 parts of immediate | |
2124 | // fields, you should not call pcrela_general. | |
2125 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
2126 | aarch64_howto[inst].doffset != -1); | |
2127 | This::template update_view<valsize>(view, immed, | |
2128 | aarch64_howto[inst].doffset, | |
2129 | aarch64_howto[inst].dst_mask); | |
2130 | ||
2131 | // Do check overflow or alignment if needed. | |
2132 | return (reloc_property->checkup_x_value(x) | |
2133 | ? This::STATUS_OKAY | |
2134 | : This::STATUS_OVERFLOW); | |
2135 | } | |
2136 | ||
2137 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
2138 | // R_AARCH64_ADR_PREL_PG_HI21 | |
2139 | ||
2140 | static inline typename This::Status | |
2141 | adrp( | |
2142 | unsigned char* view, | |
2143 | Address sa, | |
2144 | Address address) | |
2145 | { | |
2146 | typename elfcpp::Swap<size, big_endian>::Valtype x = | |
2147 | This::Page(sa) - This::Page(address); | |
2148 | update_adr(view, x, NULL); | |
2149 | return (size == 64 && Bits<32>::has_overflow(x) | |
2150 | ? This::STATUS_OVERFLOW | |
2151 | : This::STATUS_OKAY); | |
2152 | } | |
2153 | ||
2154 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
2155 | // R_AARCH64_ADR_PREL_PG_HI21 | |
2156 | ||
2157 | static inline typename This::Status | |
2158 | adrp(unsigned char* view, | |
2159 | const Sized_relobj_file<size, big_endian>* object, | |
2160 | const Symbol_value<size>* psymval, | |
2161 | Address addend, | |
2162 | Address address, | |
2163 | const AArch64_reloc_property* reloc_property) | |
2164 | { | |
2165 | Address sa = psymval->value(object, addend); | |
2166 | typename elfcpp::Swap<size, big_endian>::Valtype x = | |
2167 | This::Page(sa) - This::Page(address); | |
2168 | update_adr(view, x, reloc_property); | |
2169 | return (reloc_property->checkup_x_value(x) | |
2170 | ? This::STATUS_OKAY | |
2171 | : This::STATUS_OVERFLOW); | |
2172 | } | |
2173 | ||
3a531937 JY |
2174 | // Update mov[n/z] instruction. Check overflow if needed. |
2175 | // If X >=0, set the instruction to movz and its immediate value to the | |
2176 | // selected bits S. | |
2177 | // If X < 0, set the instruction to movn and its immediate value to | |
2178 | // NOT (selected bits of). | |
2179 | ||
2180 | static inline typename This::Status | |
2181 | movnz(unsigned char* view, | |
2182 | typename elfcpp::Swap<size, big_endian>::Valtype x, | |
2183 | const AArch64_reloc_property* reloc_property) | |
2184 | { | |
2185 | // Select bits from X. | |
2186 | Address immed = reloc_property->select_x_value(x); | |
2187 | bool is_movz = true; | |
2188 | if (static_cast<int64_t>(x) < 0) | |
2189 | { | |
2190 | immed = ~immed; | |
2191 | is_movz = false; | |
2192 | } | |
2193 | ||
2194 | // Update movnz instruction. | |
2195 | update_movnz(view, immed, is_movz); | |
2196 | ||
2197 | // Do check overflow or alignment if needed. | |
2198 | return (reloc_property->checkup_x_value(x) | |
2199 | ? This::STATUS_OKAY | |
2200 | : This::STATUS_OVERFLOW); | |
2201 | } | |
2202 | ||
2203 | }; // End of AArch64_relocate_functions | |
2204 | ||
2205 | ||
2206 | template<int size, bool big_endian> | |
2207 | typename elfcpp::Elf_types<size>::Elf_Addr | |
2208 | Target_aarch64<size, big_endian>::do_reloc_addend( | |
2209 | void* arg, unsigned int r_type, | |
2210 | typename elfcpp::Elf_types<size>::Elf_Addr) const | |
2211 | { | |
2212 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
2213 | uintptr_t intarg = reinterpret_cast<uintptr_t>(arg); | |
2214 | gold_assert(intarg < this->tlsdesc_reloc_info_.size()); | |
2215 | const Tlsdesc_info& ti(this->tlsdesc_reloc_info_[intarg]); | |
2216 | const Symbol_value<size>* psymval = ti.object->local_symbol(ti.r_sym); | |
2217 | gold_assert(psymval->is_tls_symbol()); | |
2218 | // The value of a TLS symbol is the offset in the TLS segment. | |
2219 | return psymval->value(ti.object, 0); | |
2220 | } | |
9363c7c3 | 2221 | |
053a4d68 JY |
2222 | // Return the number of entries in the PLT. |
2223 | ||
2224 | template<int size, bool big_endian> | |
2225 | unsigned int | |
2226 | Target_aarch64<size, big_endian>::plt_entry_count() const | |
2227 | { | |
2228 | if (this->plt_ == NULL) | |
2229 | return 0; | |
2230 | return this->plt_->entry_count(); | |
2231 | } | |
2232 | ||
2233 | // Return the offset of the first non-reserved PLT entry. | |
2234 | ||
2235 | template<int size, bool big_endian> | |
2236 | unsigned int | |
2237 | Target_aarch64<size, big_endian>::first_plt_entry_offset() const | |
2238 | { | |
2239 | return this->plt_->first_plt_entry_offset(); | |
2240 | } | |
2241 | ||
2242 | // Return the size of each PLT entry. | |
2243 | ||
2244 | template<int size, bool big_endian> | |
2245 | unsigned int | |
2246 | Target_aarch64<size, big_endian>::plt_entry_size() const | |
2247 | { | |
2248 | return this->plt_->get_plt_entry_size(); | |
2249 | } | |
2250 | ||
3a531937 | 2251 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. |
053a4d68 JY |
2252 | |
2253 | template<int size, bool big_endian> | |
3a531937 JY |
2254 | void |
2255 | Target_aarch64<size, big_endian>::define_tls_base_symbol( | |
2256 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 2257 | { |
3a531937 JY |
2258 | if (this->tls_base_symbol_defined_) |
2259 | return; | |
2260 | ||
2261 | Output_segment* tls_segment = layout->tls_segment(); | |
2262 | if (tls_segment != NULL) | |
2263 | { | |
2264 | bool is_exec = parameters->options().output_is_executable(); | |
2265 | symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL, | |
2266 | Symbol_table::PREDEFINED, | |
2267 | tls_segment, 0, 0, | |
2268 | elfcpp::STT_TLS, | |
2269 | elfcpp::STB_LOCAL, | |
2270 | elfcpp::STV_HIDDEN, 0, | |
2271 | (is_exec | |
2272 | ? Symbol::SEGMENT_END | |
2273 | : Symbol::SEGMENT_START), | |
2274 | true); | |
2275 | } | |
2276 | this->tls_base_symbol_defined_ = true; | |
053a4d68 JY |
2277 | } |
2278 | ||
3a531937 | 2279 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. |
053a4d68 JY |
2280 | |
2281 | template<int size, bool big_endian> | |
3a531937 JY |
2282 | void |
2283 | Target_aarch64<size, big_endian>::reserve_tlsdesc_entries( | |
2284 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 2285 | { |
3a531937 JY |
2286 | if (this->plt_ == NULL) |
2287 | this->make_plt_section(symtab, layout); | |
2288 | ||
2289 | if (!this->plt_->has_tlsdesc_entry()) | |
053a4d68 | 2290 | { |
3a531937 JY |
2291 | // Allocate the TLSDESC_GOT entry. |
2292 | Output_data_got_aarch64<size, big_endian>* got = | |
2293 | this->got_section(symtab, layout); | |
2294 | unsigned int got_offset = got->add_constant(0); | |
2295 | ||
2296 | // Allocate the TLSDESC_PLT entry. | |
2297 | this->plt_->reserve_tlsdesc_entry(got_offset); | |
053a4d68 | 2298 | } |
053a4d68 JY |
2299 | } |
2300 | ||
3a531937 | 2301 | // Create a GOT entry for the TLS module index. |
053a4d68 JY |
2302 | |
2303 | template<int size, bool big_endian> | |
3a531937 JY |
2304 | unsigned int |
2305 | Target_aarch64<size, big_endian>::got_mod_index_entry( | |
2306 | Symbol_table* symtab, Layout* layout, | |
2307 | Sized_relobj_file<size, big_endian>* object) | |
2308 | { | |
2309 | if (this->got_mod_index_offset_ == -1U) | |
2310 | { | |
2311 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
2312 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
2313 | Output_data_got_aarch64<size, big_endian>* got = | |
2314 | this->got_section(symtab, layout); | |
2315 | unsigned int got_offset = got->add_constant(0); | |
2316 | rela_dyn->add_local(object, 0, elfcpp::R_AARCH64_TLS_DTPMOD64, got, | |
2317 | got_offset, 0); | |
2318 | got->add_constant(0); | |
2319 | this->got_mod_index_offset_ = got_offset; | |
2320 | } | |
2321 | return this->got_mod_index_offset_; | |
2322 | } | |
2323 | ||
2324 | // Optimize the TLS relocation type based on what we know about the | |
2325 | // symbol. IS_FINAL is true if the final address of this symbol is | |
2326 | // known at link time. | |
2327 | ||
2328 | template<int size, bool big_endian> | |
2329 | tls::Tls_optimization | |
2330 | Target_aarch64<size, big_endian>::optimize_tls_reloc(bool is_final, | |
2331 | int r_type) | |
2332 | { | |
2333 | // If we are generating a shared library, then we can't do anything | |
2334 | // in the linker | |
2335 | if (parameters->options().shared()) | |
2336 | return tls::TLSOPT_NONE; | |
2337 | ||
2338 | switch (r_type) | |
2339 | { | |
2340 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
2341 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
2342 | case elfcpp::R_AARCH64_TLSDESC_LD_PREL19: | |
2343 | case elfcpp::R_AARCH64_TLSDESC_ADR_PREL21: | |
2344 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
2345 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
2346 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
2347 | case elfcpp::R_AARCH64_TLSDESC_OFF_G1: | |
2348 | case elfcpp::R_AARCH64_TLSDESC_OFF_G0_NC: | |
2349 | case elfcpp::R_AARCH64_TLSDESC_LDR: | |
2350 | case elfcpp::R_AARCH64_TLSDESC_ADD: | |
2351 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
2352 | // These are General-Dynamic which permits fully general TLS | |
2353 | // access. Since we know that we are generating an executable, | |
2354 | // we can convert this to Initial-Exec. If we also know that | |
2355 | // this is a local symbol, we can further switch to Local-Exec. | |
2356 | if (is_final) | |
2357 | return tls::TLSOPT_TO_LE; | |
2358 | return tls::TLSOPT_TO_IE; | |
2359 | ||
2360 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1: | |
2361 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
2362 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
2363 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
2364 | case elfcpp::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
2365 | // These are Initial-Exec relocs which get the thread offset | |
2366 | // from the GOT. If we know that we are linking against the | |
2367 | // local symbol, we can switch to Local-Exec, which links the | |
2368 | // thread offset into the instruction. | |
2369 | if (is_final) | |
2370 | return tls::TLSOPT_TO_LE; | |
2371 | return tls::TLSOPT_NONE; | |
2372 | ||
2373 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
2374 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
2375 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
2376 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
2377 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
2378 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
2379 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
2380 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
2381 | // When we already have Local-Exec, there is nothing further we | |
2382 | // can do. | |
2383 | return tls::TLSOPT_NONE; | |
2384 | ||
2385 | default: | |
2386 | gold_unreachable(); | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | // Returns true if this relocation type could be that of a function pointer. | |
2391 | ||
2392 | template<int size, bool big_endian> | |
2393 | inline bool | |
2394 | Target_aarch64<size, big_endian>::Scan::possible_function_pointer_reloc( | |
2395 | unsigned int r_type) | |
2396 | { | |
2397 | switch (r_type) | |
2398 | { | |
2399 | case elfcpp::R_AARCH64_ABS64: | |
2400 | //TODO | |
2401 | { | |
2402 | return true; | |
2403 | } | |
2404 | } | |
2405 | return false; | |
2406 | } | |
2407 | ||
2408 | // For safe ICF, scan a relocation for a local symbol to check if it | |
2409 | // corresponds to a function pointer being taken. In that case mark | |
2410 | // the function whose pointer was taken as not foldable. | |
2411 | ||
2412 | template<int size, bool big_endian> | |
2413 | inline bool | |
2414 | Target_aarch64<size, big_endian>::Scan::local_reloc_may_be_function_pointer( | |
2415 | Symbol_table* , | |
053a4d68 JY |
2416 | Layout* , |
2417 | Target_aarch64<size, big_endian>* , | |
2418 | Sized_relobj_file<size, big_endian>* , | |
2419 | unsigned int , | |
2420 | Output_section* , | |
2421 | const elfcpp::Rela<size, big_endian>& , | |
2422 | unsigned int r_type, | |
2423 | const elfcpp::Sym<size, big_endian>&) | |
2424 | { | |
2425 | // When building a shared library, do not fold any local symbols as it is | |
2426 | // not possible to distinguish pointer taken versus a call by looking at | |
2427 | // the relocation types. | |
2428 | return (parameters->options().shared() | |
9363c7c3 | 2429 | || possible_function_pointer_reloc(r_type)); |
053a4d68 JY |
2430 | } |
2431 | ||
2432 | // For safe ICF, scan a relocation for a global symbol to check if it | |
2433 | // corresponds to a function pointer being taken. In that case mark | |
2434 | // the function whose pointer was taken as not foldable. | |
2435 | ||
2436 | template<int size, bool big_endian> | |
2437 | inline bool | |
2438 | Target_aarch64<size, big_endian>::Scan::global_reloc_may_be_function_pointer( | |
2439 | Symbol_table* , | |
2440 | Layout* , | |
2441 | Target_aarch64<size, big_endian>* , | |
2442 | Sized_relobj_file<size, big_endian>* , | |
2443 | unsigned int , | |
2444 | Output_section* , | |
2445 | const elfcpp::Rela<size, big_endian>& , | |
2446 | unsigned int r_type, | |
2447 | Symbol* gsym) | |
2448 | { | |
2449 | // When building a shared library, do not fold symbols whose visibility | |
2450 | // is hidden, internal or protected. | |
2451 | return ((parameters->options().shared() | |
9363c7c3 JY |
2452 | && (gsym->visibility() == elfcpp::STV_INTERNAL |
2453 | || gsym->visibility() == elfcpp::STV_PROTECTED | |
2454 | || gsym->visibility() == elfcpp::STV_HIDDEN)) | |
2455 | || possible_function_pointer_reloc(r_type)); | |
053a4d68 JY |
2456 | } |
2457 | ||
2458 | // Report an unsupported relocation against a local symbol. | |
2459 | ||
2460 | template<int size, bool big_endian> | |
2461 | void | |
2462 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_local( | |
2463 | Sized_relobj_file<size, big_endian>* object, | |
2464 | unsigned int r_type) | |
2465 | { | |
2466 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
2467 | object->name().c_str(), r_type); | |
2468 | } | |
2469 | ||
2470 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
2471 | // dynamic linker does not support it, issue an error. | |
2472 | ||
2473 | template<int size, bool big_endian> | |
2474 | void | |
2475 | Target_aarch64<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
9363c7c3 | 2476 | unsigned int r_type) |
053a4d68 JY |
2477 | { |
2478 | gold_assert(r_type != elfcpp::R_AARCH64_NONE); | |
2479 | ||
2480 | switch (r_type) | |
2481 | { | |
2482 | // These are the relocation types supported by glibc for AARCH64. | |
2483 | case elfcpp::R_AARCH64_NONE: | |
2484 | case elfcpp::R_AARCH64_COPY: | |
2485 | case elfcpp::R_AARCH64_GLOB_DAT: | |
2486 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
2487 | case elfcpp::R_AARCH64_RELATIVE: | |
2488 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
2489 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
2490 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
2491 | case elfcpp::R_AARCH64_TLSDESC: | |
2492 | case elfcpp::R_AARCH64_IRELATIVE: | |
2493 | case elfcpp::R_AARCH64_ABS32: | |
2494 | case elfcpp::R_AARCH64_ABS64: | |
2495 | return; | |
2496 | ||
2497 | default: | |
2498 | break; | |
2499 | } | |
2500 | ||
2501 | // This prevents us from issuing more than one error per reloc | |
2502 | // section. But we can still wind up issuing more than one | |
2503 | // error per object file. | |
2504 | if (this->issued_non_pic_error_) | |
2505 | return; | |
2506 | gold_assert(parameters->options().output_is_position_independent()); | |
2507 | object->error(_("requires unsupported dynamic reloc; " | |
9363c7c3 | 2508 | "recompile with -fPIC")); |
053a4d68 JY |
2509 | this->issued_non_pic_error_ = true; |
2510 | return; | |
2511 | } | |
2512 | ||
2513 | // Scan a relocation for a local symbol. | |
2514 | ||
2515 | template<int size, bool big_endian> | |
2516 | inline void | |
2517 | Target_aarch64<size, big_endian>::Scan::local( | |
8e33481e HS |
2518 | Symbol_table* symtab, |
2519 | Layout* layout, | |
2520 | Target_aarch64<size, big_endian>* target, | |
9363c7c3 | 2521 | Sized_relobj_file<size, big_endian>* object, |
8e33481e HS |
2522 | unsigned int data_shndx, |
2523 | Output_section* output_section, | |
2524 | const elfcpp::Rela<size, big_endian>& rela, | |
053a4d68 JY |
2525 | unsigned int r_type, |
2526 | const elfcpp::Sym<size, big_endian>& /* lsym */, | |
2527 | bool is_discarded) | |
2528 | { | |
2529 | if (is_discarded) | |
2530 | return; | |
2531 | ||
8e33481e | 2532 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
3a531937 JY |
2533 | Reloc_section; |
2534 | Output_data_got_aarch64<size, big_endian>* got = | |
2535 | target->got_section(symtab, layout); | |
2536 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
8e33481e | 2537 | |
053a4d68 JY |
2538 | switch (r_type) |
2539 | { | |
9363c7c3 JY |
2540 | case elfcpp::R_AARCH64_ABS32: |
2541 | case elfcpp::R_AARCH64_ABS16: | |
8e33481e HS |
2542 | if (parameters->options().output_is_position_independent()) |
2543 | { | |
2544 | gold_error(_("%s: unsupported reloc %u in pos independent link."), | |
2545 | object->name().c_str(), r_type); | |
2546 | } | |
2547 | break; | |
2548 | ||
2549 | case elfcpp::R_AARCH64_ABS64: | |
9363c7c3 JY |
2550 | // If building a shared library or pie, we need to mark this as a dynmic |
2551 | // reloction, so that the dynamic loader can relocate it. | |
9363c7c3 JY |
2552 | if (parameters->options().output_is_position_independent()) |
2553 | { | |
8e33481e | 2554 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
8e33481e HS |
2555 | rela_dyn->add_local_relative(object, r_sym, |
2556 | elfcpp::R_AARCH64_RELATIVE, | |
2557 | output_section, | |
2558 | data_shndx, | |
2559 | rela.get_r_offset(), | |
2560 | rela.get_r_addend(), | |
2561 | false /* is ifunc */); | |
9363c7c3 JY |
2562 | } |
2563 | break; | |
2564 | ||
8e33481e HS |
2565 | case elfcpp::R_AARCH64_PREL64: |
2566 | case elfcpp::R_AARCH64_PREL32: | |
2567 | case elfcpp::R_AARCH64_PREL16: | |
2568 | break; | |
2569 | ||
3a531937 JY |
2570 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
2571 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
2572 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
2573 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
2574 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
2575 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
2576 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
2577 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
2578 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 2579 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
3a531937 | 2580 | break; |
053a4d68 | 2581 | |
8e33481e HS |
2582 | // Control flow, pc-relative. We don't need to do anything for a relative |
2583 | // addressing relocation against a local symbol if it does not reference | |
2584 | // the GOT. | |
2585 | case elfcpp::R_AARCH64_TSTBR14: | |
2586 | case elfcpp::R_AARCH64_CONDBR19: | |
2587 | case elfcpp::R_AARCH64_JUMP26: | |
2588 | case elfcpp::R_AARCH64_CALL26: | |
2589 | break; | |
2590 | ||
2591 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
2592 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
2593 | { | |
3a531937 JY |
2594 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: |
2595 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
2596 | if (tlsopt == tls::TLSOPT_TO_LE) | |
2597 | break; | |
2598 | ||
8e33481e HS |
2599 | layout->set_has_static_tls(); |
2600 | // Create a GOT entry for the tp-relative offset. | |
8e33481e HS |
2601 | if (!parameters->doing_static_link()) |
2602 | { | |
2603 | got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET, | |
2604 | target->rela_dyn_section(layout), | |
2605 | elfcpp::R_AARCH64_TLS_TPREL64); | |
2606 | } | |
2607 | else if (!object->local_has_got_offset(r_sym, | |
2608 | GOT_TYPE_TLS_OFFSET)) | |
2609 | { | |
2610 | got->add_local(object, r_sym, GOT_TYPE_TLS_OFFSET); | |
2611 | unsigned int got_offset = | |
2612 | object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); | |
2613 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
2614 | gold_assert(addend == 0); | |
2615 | got->add_static_reloc(got_offset, elfcpp::R_AARCH64_TLS_TPREL64, | |
2616 | object, r_sym); | |
2617 | } | |
2618 | } | |
2619 | break; | |
2620 | ||
3a531937 JY |
2621 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
2622 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
2623 | { | |
2624 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
2625 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
2626 | if (tlsopt == tls::TLSOPT_TO_LE) | |
2627 | { | |
2628 | layout->set_has_static_tls(); | |
2629 | break; | |
2630 | } | |
2631 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
2632 | ||
2633 | got->add_local_pair_with_rel(object,r_sym, data_shndx, | |
2634 | GOT_TYPE_TLS_PAIR, | |
2635 | target->rela_dyn_section(layout), | |
2636 | elfcpp::R_AARCH64_TLS_DTPMOD64); | |
2637 | } | |
2638 | break; | |
2639 | ||
8e33481e HS |
2640 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
2641 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
2642 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
2643 | { | |
2644 | layout->set_has_static_tls(); | |
2645 | bool output_is_shared = parameters->options().shared(); | |
2646 | if (output_is_shared) | |
3a531937 | 2647 | gold_error(_("%s: unsupported TLSLE reloc %u in shared code."), |
8e33481e HS |
2648 | object->name().c_str(), r_type); |
2649 | } | |
9363c7c3 JY |
2650 | break; |
2651 | ||
3a531937 JY |
2652 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
2653 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
2654 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
2655 | { | |
2656 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
2657 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
2658 | target->define_tls_base_symbol(symtab, layout); | |
2659 | if (tlsopt == tls::TLSOPT_NONE) | |
2660 | { | |
2661 | // Create reserved PLT and GOT entries for the resolver. | |
2662 | target->reserve_tlsdesc_entries(symtab, layout); | |
2663 | ||
2664 | // Generate a double GOT entry with an R_AARCH64_TLSDESC reloc. | |
2665 | // The R_AARCH64_TLSDESC reloc is resolved lazily, so the GOT | |
2666 | // entry needs to be in an area in .got.plt, not .got. Call | |
2667 | // got_section to make sure the section has been created. | |
2668 | target->got_section(symtab, layout); | |
2669 | Output_data_got<size, big_endian>* got = | |
2670 | target->got_tlsdesc_section(); | |
2671 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
2672 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC)) | |
2673 | { | |
2674 | unsigned int got_offset = got->add_constant(0); | |
2675 | got->add_constant(0); | |
2676 | object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC, | |
2677 | got_offset); | |
2678 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
2679 | // We store the arguments we need in a vector, and use | |
2680 | // the index into the vector as the parameter to pass | |
2681 | // to the target specific routines. | |
2682 | uintptr_t intarg = target->add_tlsdesc_info(object, r_sym); | |
2683 | void* arg = reinterpret_cast<void*>(intarg); | |
2684 | rt->add_target_specific(elfcpp::R_AARCH64_TLSDESC, arg, | |
2685 | got, got_offset, 0); | |
2686 | } | |
2687 | } | |
2688 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
2689 | unsupported_reloc_local(object, r_type); | |
2690 | } | |
2691 | break; | |
2692 | ||
2693 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
2694 | break; | |
2695 | ||
9363c7c3 JY |
2696 | default: |
2697 | unsupported_reloc_local(object, r_type); | |
053a4d68 JY |
2698 | } |
2699 | } | |
2700 | ||
2701 | ||
2702 | // Report an unsupported relocation against a global symbol. | |
2703 | ||
2704 | template<int size, bool big_endian> | |
2705 | void | |
2706 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_global( | |
2707 | Sized_relobj_file<size, big_endian>* object, | |
2708 | unsigned int r_type, | |
2709 | Symbol* gsym) | |
2710 | { | |
2711 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
2712 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
2713 | } | |
2714 | ||
2715 | template<int size, bool big_endian> | |
2716 | inline void | |
2717 | Target_aarch64<size, big_endian>::Scan::global( | |
9363c7c3 JY |
2718 | Symbol_table* symtab, |
2719 | Layout* layout, | |
2720 | Target_aarch64<size, big_endian>* target, | |
8e33481e HS |
2721 | Sized_relobj_file<size, big_endian> * object, |
2722 | unsigned int data_shndx, | |
2723 | Output_section* output_section, | |
2724 | const elfcpp::Rela<size, big_endian>& rela, | |
9363c7c3 JY |
2725 | unsigned int r_type, |
2726 | Symbol* gsym) | |
053a4d68 | 2727 | { |
8e33481e HS |
2728 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
2729 | Reloc_section; | |
3a531937 JY |
2730 | const AArch64_reloc_property* arp = |
2731 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
2732 | gold_assert(arp != NULL); | |
2733 | ||
9363c7c3 JY |
2734 | switch (r_type) |
2735 | { | |
8e33481e HS |
2736 | case elfcpp::R_AARCH64_ABS16: |
2737 | case elfcpp::R_AARCH64_ABS32: | |
9363c7c3 | 2738 | case elfcpp::R_AARCH64_ABS64: |
8e33481e HS |
2739 | { |
2740 | // Make a PLT entry if necessary. | |
2741 | if (gsym->needs_plt_entry()) | |
2742 | { | |
2743 | target->make_plt_entry(symtab, layout, gsym); | |
2744 | // Since this is not a PC-relative relocation, we may be | |
2745 | // taking the address of a function. In that case we need to | |
2746 | // set the entry in the dynamic symbol table to the address of | |
2747 | // the PLT entry. | |
2748 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
2749 | gsym->set_needs_dynsym_value(); | |
2750 | } | |
2751 | // Make a dynamic relocation if necessary. | |
8e33481e HS |
2752 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) |
2753 | { | |
2754 | if (!parameters->options().output_is_position_independent() | |
2755 | && gsym->may_need_copy_reloc()) | |
2756 | { | |
3a531937 JY |
2757 | target->copy_reloc(symtab, layout, object, |
2758 | data_shndx, output_section, gsym, rela); | |
8e33481e HS |
2759 | } |
2760 | else if (r_type == elfcpp::R_AARCH64_ABS64 | |
2761 | && gsym->can_use_relative_reloc(false)) | |
2762 | { | |
2763 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2764 | rela_dyn->add_global_relative(gsym, | |
2765 | elfcpp::R_AARCH64_RELATIVE, | |
2766 | output_section, | |
2767 | object, | |
2768 | data_shndx, | |
2769 | rela.get_r_offset(), | |
2770 | rela.get_r_addend(), | |
2771 | false); | |
2772 | } | |
2773 | else | |
2774 | { | |
2775 | check_non_pic(object, r_type); | |
2776 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>* | |
2777 | rela_dyn = target->rela_dyn_section(layout); | |
2778 | rela_dyn->add_global( | |
2779 | gsym, r_type, output_section, object, | |
2780 | data_shndx, rela.get_r_offset(),rela.get_r_addend()); | |
2781 | } | |
2782 | } | |
2783 | } | |
2784 | break; | |
2785 | ||
2786 | case elfcpp::R_AARCH64_PREL16: | |
2787 | case elfcpp::R_AARCH64_PREL32: | |
2788 | case elfcpp::R_AARCH64_PREL64: | |
9363c7c3 JY |
2789 | // This is used to fill the GOT absolute address. |
2790 | if (gsym->needs_plt_entry()) | |
2791 | { | |
2792 | target->make_plt_entry(symtab, layout, gsym); | |
2793 | } | |
2794 | break; | |
2795 | ||
3a531937 JY |
2796 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
2797 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
2798 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
2799 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
2800 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
2801 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
2802 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
2803 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
2804 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 2805 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
9363c7c3 | 2806 | { |
3a531937 JY |
2807 | if (gsym->needs_plt_entry()) |
2808 | target->make_plt_entry(symtab, layout, gsym); | |
2809 | // Make a dynamic relocation if necessary. | |
2810 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) | |
2811 | { | |
2812 | if (parameters->options().output_is_executable() | |
2813 | && gsym->may_need_copy_reloc()) | |
2814 | { | |
2815 | target->copy_reloc(symtab, layout, object, | |
2816 | data_shndx, output_section, gsym, rela); | |
2817 | } | |
2818 | } | |
9363c7c3 JY |
2819 | break; |
2820 | } | |
2821 | ||
2822 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
2823 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
2824 | { | |
2825 | // This pair of relocations is used to access a specific GOT entry. | |
2826 | // Note a GOT entry is an *address* to a symbol. | |
2827 | // The symbol requires a GOT entry | |
2828 | Output_data_got_aarch64<size, big_endian>* got = | |
2829 | target->got_section(symtab, layout); | |
2830 | if (gsym->final_value_is_known()) | |
2831 | { | |
2832 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
2833 | } | |
2834 | else | |
2835 | { | |
2836 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
2837 | if (gsym->is_from_dynobj() | |
2838 | || gsym->is_undefined() | |
2839 | || gsym->is_preemptible() | |
2840 | || (gsym->visibility() == elfcpp::STV_PROTECTED | |
2841 | && parameters->options().shared())) | |
2842 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, | |
2843 | rela_dyn, elfcpp::R_AARCH64_GLOB_DAT); | |
2844 | else | |
2845 | { | |
3a531937 JY |
2846 | if (got->add_global(gsym, GOT_TYPE_STANDARD)) |
2847 | { | |
2848 | rela_dyn->add_global_relative( | |
2849 | gsym, elfcpp::R_AARCH64_RELATIVE, | |
2850 | got, | |
2851 | gsym->got_offset(GOT_TYPE_STANDARD), | |
2852 | 0, | |
2853 | false); | |
2854 | } | |
9363c7c3 JY |
2855 | } |
2856 | } | |
2857 | break; | |
2858 | } | |
2859 | ||
8e33481e HS |
2860 | case elfcpp::R_AARCH64_TSTBR14: |
2861 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
2862 | case elfcpp::R_AARCH64_JUMP26: |
2863 | case elfcpp::R_AARCH64_CALL26: | |
2864 | { | |
2865 | if (gsym->final_value_is_known()) | |
2866 | break; | |
2867 | ||
2868 | if (gsym->is_defined() && | |
2869 | !gsym->is_from_dynobj() && | |
2870 | !gsym->is_preemptible()) | |
2871 | break; | |
2872 | ||
2873 | // Make plt entry for function call. | |
9363c7c3 JY |
2874 | target->make_plt_entry(symtab, layout, gsym); |
2875 | break; | |
2876 | } | |
2877 | ||
3a531937 JY |
2878 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
2879 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // General dynamic | |
2880 | { | |
2881 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
2882 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
2883 | if (tlsopt == tls::TLSOPT_TO_LE) | |
2884 | { | |
2885 | layout->set_has_static_tls(); | |
2886 | break; | |
2887 | } | |
2888 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
2889 | ||
2890 | // General dynamic. | |
2891 | Output_data_got_aarch64<size, big_endian>* got = | |
2892 | target->got_section(symtab, layout); | |
2893 | // Create 2 consecutive entries for module index and offset. | |
2894 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, | |
2895 | target->rela_dyn_section(layout), | |
2896 | elfcpp::R_AARCH64_TLS_DTPMOD64, | |
2897 | elfcpp::R_AARCH64_TLS_DTPREL64); | |
2898 | } | |
2899 | break; | |
2900 | ||
8e33481e | 2901 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 2902 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial executable |
8e33481e | 2903 | { |
3a531937 JY |
2904 | tls::Tls_optimization tlsopt =Target_aarch64<size, big_endian>:: |
2905 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
2906 | if (tlsopt == tls::TLSOPT_TO_LE) | |
2907 | break; | |
2908 | ||
8e33481e HS |
2909 | layout->set_has_static_tls(); |
2910 | // Create a GOT entry for the tp-relative offset. | |
2911 | Output_data_got_aarch64<size, big_endian>* got | |
2912 | = target->got_section(symtab, layout); | |
2913 | if (!parameters->doing_static_link()) | |
2914 | { | |
2915 | got->add_global_with_rel( | |
2916 | gsym, GOT_TYPE_TLS_OFFSET, | |
2917 | target->rela_dyn_section(layout), | |
2918 | elfcpp::R_AARCH64_TLS_TPREL64); | |
2919 | } | |
2920 | if (!gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) | |
2921 | { | |
2922 | got->add_global(gsym, GOT_TYPE_TLS_OFFSET); | |
2923 | unsigned int got_offset = | |
2924 | gsym->got_offset(GOT_TYPE_TLS_OFFSET); | |
2925 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
2926 | gold_assert(addend == 0); | |
2927 | got->add_static_reloc(got_offset, | |
2928 | elfcpp::R_AARCH64_TLS_TPREL64, gsym); | |
2929 | } | |
2930 | } | |
2931 | break; | |
2932 | ||
2933 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
2934 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3a531937 | 2935 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: // Local executable |
8e33481e HS |
2936 | layout->set_has_static_tls(); |
2937 | if (parameters->options().shared()) | |
2938 | gold_error(_("%s: unsupported TLSLE reloc type %u in shared objects."), | |
2939 | object->name().c_str(), r_type); | |
2940 | break; | |
2941 | ||
3a531937 JY |
2942 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
2943 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
2944 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: // TLS descriptor | |
2945 | { | |
2946 | target->define_tls_base_symbol(symtab, layout); | |
2947 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
2948 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
2949 | if (tlsopt == tls::TLSOPT_NONE) | |
2950 | { | |
2951 | // Create reserved PLT and GOT entries for the resolver. | |
2952 | target->reserve_tlsdesc_entries(symtab, layout); | |
2953 | ||
2954 | // Create a double GOT entry with an R_AARCH64_TLSDESC | |
2955 | // relocation. The R_AARCH64_TLSDESC is resolved lazily, so the GOT | |
2956 | // entry needs to be in an area in .got.plt, not .got. Call | |
2957 | // got_section to make sure the section has been created. | |
2958 | target->got_section(symtab, layout); | |
2959 | Output_data_got<size, big_endian>* got = | |
2960 | target->got_tlsdesc_section(); | |
2961 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
2962 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt, | |
2963 | elfcpp::R_AARCH64_TLSDESC, 0); | |
2964 | } | |
2965 | else if (tlsopt == tls::TLSOPT_TO_IE) | |
2966 | { | |
2967 | // Create a GOT entry for the tp-relative offset. | |
2968 | Output_data_got<size, big_endian>* got | |
2969 | = target->got_section(symtab, layout); | |
2970 | got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, | |
2971 | target->rela_dyn_section(layout), | |
2972 | elfcpp::R_AARCH64_TLS_TPREL64); | |
2973 | } | |
2974 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
2975 | unsupported_reloc_global(object, r_type, gsym); | |
2976 | } | |
2977 | break; | |
2978 | ||
2979 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
2980 | break; | |
2981 | ||
9363c7c3 | 2982 | default: |
8e33481e | 2983 | gold_error(_("%s: unsupported reloc type in global scan"), |
3a531937 JY |
2984 | aarch64_reloc_property_table-> |
2985 | reloc_name_in_error_message(r_type).c_str()); | |
9363c7c3 | 2986 | } |
053a4d68 | 2987 | return; |
9363c7c3 JY |
2988 | } // End of Scan::global |
2989 | ||
3a531937 | 2990 | |
9363c7c3 JY |
2991 | // Create the PLT section. |
2992 | template<int size, bool big_endian> | |
2993 | void | |
2994 | Target_aarch64<size, big_endian>::make_plt_section( | |
2995 | Symbol_table* symtab, Layout* layout) | |
2996 | { | |
2997 | if (this->plt_ == NULL) | |
2998 | { | |
2999 | // Create the GOT section first. | |
3000 | this->got_section(symtab, layout); | |
3001 | ||
3a531937 JY |
3002 | this->plt_ = this->make_data_plt(layout, this->got_, this->got_plt_, |
3003 | this->got_irelative_); | |
9363c7c3 JY |
3004 | |
3005 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
3006 | (elfcpp::SHF_ALLOC | |
3007 | | elfcpp::SHF_EXECINSTR), | |
3008 | this->plt_, ORDER_PLT, false); | |
3009 | ||
3010 | // Make the sh_info field of .rela.plt point to .plt. | |
3011 | Output_section* rela_plt_os = this->plt_->rela_plt()->output_section(); | |
3012 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
3013 | } | |
3014 | } | |
3015 | ||
3a531937 JY |
3016 | // Return the section for TLSDESC relocations. |
3017 | ||
3018 | template<int size, bool big_endian> | |
3019 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
3020 | Target_aarch64<size, big_endian>::rela_tlsdesc_section(Layout* layout) const | |
3021 | { | |
3022 | return this->plt_section()->rela_tlsdesc(layout); | |
3023 | } | |
3024 | ||
9363c7c3 JY |
3025 | // Create a PLT entry for a global symbol. |
3026 | ||
3027 | template<int size, bool big_endian> | |
3028 | void | |
3029 | Target_aarch64<size, big_endian>::make_plt_entry( | |
3030 | Symbol_table* symtab, | |
3031 | Layout* layout, | |
3032 | Symbol* gsym) | |
3033 | { | |
3034 | if (gsym->has_plt_offset()) | |
3035 | return; | |
3036 | ||
3037 | if (this->plt_ == NULL) | |
3038 | this->make_plt_section(symtab, layout); | |
3039 | ||
3040 | this->plt_->add_entry(gsym); | |
053a4d68 JY |
3041 | } |
3042 | ||
3043 | template<int size, bool big_endian> | |
3044 | void | |
3045 | Target_aarch64<size, big_endian>::gc_process_relocs( | |
3046 | Symbol_table* symtab, | |
3047 | Layout* layout, | |
3048 | Sized_relobj_file<size, big_endian>* object, | |
3049 | unsigned int data_shndx, | |
3050 | unsigned int sh_type, | |
3051 | const unsigned char* prelocs, | |
3052 | size_t reloc_count, | |
3053 | Output_section* output_section, | |
3054 | bool needs_special_offset_handling, | |
3055 | size_t local_symbol_count, | |
3056 | const unsigned char* plocal_symbols) | |
3057 | { | |
3058 | if (sh_type == elfcpp::SHT_REL) | |
3059 | { | |
3060 | return; | |
3061 | } | |
3062 | ||
9363c7c3 JY |
3063 | gold::gc_process_relocs< |
3064 | size, big_endian, | |
3065 | Target_aarch64<size, big_endian>, | |
3066 | elfcpp::SHT_RELA, | |
3067 | typename Target_aarch64<size, big_endian>::Scan, | |
3068 | typename Target_aarch64<size, big_endian>::Relocatable_size_for_reloc>( | |
053a4d68 JY |
3069 | symtab, |
3070 | layout, | |
3071 | this, | |
3072 | object, | |
3073 | data_shndx, | |
3074 | prelocs, | |
3075 | reloc_count, | |
3076 | output_section, | |
3077 | needs_special_offset_handling, | |
3078 | local_symbol_count, | |
3079 | plocal_symbols); | |
3080 | } | |
3081 | ||
3082 | // Scan relocations for a section. | |
3083 | ||
3084 | template<int size, bool big_endian> | |
3085 | void | |
3086 | Target_aarch64<size, big_endian>::scan_relocs( | |
3087 | Symbol_table* symtab, | |
3088 | Layout* layout, | |
3089 | Sized_relobj_file<size, big_endian>* object, | |
3090 | unsigned int data_shndx, | |
3091 | unsigned int sh_type, | |
3092 | const unsigned char* prelocs, | |
3093 | size_t reloc_count, | |
3094 | Output_section* output_section, | |
3095 | bool needs_special_offset_handling, | |
3096 | size_t local_symbol_count, | |
3097 | const unsigned char* plocal_symbols) | |
3098 | { | |
3099 | if (sh_type == elfcpp::SHT_REL) | |
3100 | { | |
3101 | gold_error(_("%s: unsupported REL reloc section"), | |
3102 | object->name().c_str()); | |
3103 | return; | |
3104 | } | |
9363c7c3 | 3105 | gold::scan_relocs<size, big_endian, Target_aarch64, elfcpp::SHT_RELA, Scan>( |
053a4d68 JY |
3106 | symtab, |
3107 | layout, | |
3108 | this, | |
3109 | object, | |
3110 | data_shndx, | |
3111 | prelocs, | |
3112 | reloc_count, | |
3113 | output_section, | |
3114 | needs_special_offset_handling, | |
3115 | local_symbol_count, | |
3116 | plocal_symbols); | |
3117 | } | |
3118 | ||
3a531937 JY |
3119 | // Return the value to use for a dynamic which requires special |
3120 | // treatment. This is how we support equality comparisons of function | |
3121 | // pointers across shared library boundaries, as described in the | |
3122 | // processor specific ABI supplement. | |
3123 | ||
3124 | template<int size,bool big_endian> | |
3125 | uint64_t | |
3126 | Target_aarch64<size,big_endian>::do_dynsym_value(const Symbol* gsym) const | |
3127 | { | |
3128 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
3129 | return this->plt_address_for_global(gsym); | |
3130 | } | |
3131 | ||
053a4d68 JY |
3132 | // Finalize the sections. |
3133 | ||
3134 | template<int size, bool big_endian> | |
3135 | void | |
3136 | Target_aarch64<size, big_endian>::do_finalize_sections( | |
9363c7c3 | 3137 | Layout* layout, |
053a4d68 | 3138 | const Input_objects*, |
9363c7c3 | 3139 | Symbol_table* symtab) |
053a4d68 | 3140 | { |
9363c7c3 JY |
3141 | const Reloc_section* rel_plt = (this->plt_ == NULL |
3142 | ? NULL | |
3143 | : this->plt_->rela_plt()); | |
3144 | layout->add_target_dynamic_tags(false, this->got_plt_, rel_plt, | |
3145 | this->rela_dyn_, true, false); | |
3146 | ||
3a531937 JY |
3147 | // Emit any relocs we saved in an attempt to avoid generating COPY |
3148 | // relocs. | |
3149 | if (this->copy_relocs_.any_saved_relocs()) | |
3150 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
3151 | ||
3152 | // Fill in some more dynamic tags. | |
3153 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
3154 | if (odyn != NULL) | |
3155 | { | |
3156 | if (this->plt_ != NULL | |
3157 | && this->plt_->output_section() != NULL | |
3158 | && this->plt_ ->has_tlsdesc_entry()) | |
3159 | { | |
3160 | unsigned int plt_offset = this->plt_->get_tlsdesc_plt_offset(); | |
3161 | unsigned int got_offset = this->plt_->get_tlsdesc_got_offset(); | |
3162 | this->got_->finalize_data_size(); | |
3163 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_PLT, | |
3164 | this->plt_, plt_offset); | |
3165 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_GOT, | |
3166 | this->got_, got_offset); | |
3167 | } | |
3168 | } | |
3169 | ||
9363c7c3 JY |
3170 | // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of |
3171 | // the .got.plt section. | |
3172 | Symbol* sym = this->global_offset_table_; | |
3173 | if (sym != NULL) | |
3174 | { | |
3175 | uint64_t data_size = this->got_plt_->current_data_size(); | |
3176 | symtab->get_sized_symbol<size>(sym)->set_symsize(data_size); | |
3177 | ||
3178 | // If the .got section is more than 0x8000 bytes, we add | |
3179 | // 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 | |
3180 | // bit relocations have a greater chance of working. | |
3181 | if (data_size >= 0x8000) | |
3182 | symtab->get_sized_symbol<size>(sym)->set_value( | |
3183 | symtab->get_sized_symbol<size>(sym)->value() + 0x8000); | |
3184 | } | |
3185 | ||
3186 | if (parameters->doing_static_link() | |
3187 | && (this->plt_ == NULL || !this->plt_->has_irelative_section())) | |
3188 | { | |
3189 | // If linking statically, make sure that the __rela_iplt symbols | |
3190 | // were defined if necessary, even if we didn't create a PLT. | |
3191 | static const Define_symbol_in_segment syms[] = | |
3192 | { | |
3193 | { | |
3194 | "__rela_iplt_start", // name | |
3195 | elfcpp::PT_LOAD, // segment_type | |
3196 | elfcpp::PF_W, // segment_flags_set | |
3197 | elfcpp::PF(0), // segment_flags_clear | |
3198 | 0, // value | |
3199 | 0, // size | |
3200 | elfcpp::STT_NOTYPE, // type | |
3201 | elfcpp::STB_GLOBAL, // binding | |
3202 | elfcpp::STV_HIDDEN, // visibility | |
3203 | 0, // nonvis | |
3204 | Symbol::SEGMENT_START, // offset_from_base | |
3205 | true // only_if_ref | |
3206 | }, | |
3207 | { | |
3208 | "__rela_iplt_end", // name | |
3209 | elfcpp::PT_LOAD, // segment_type | |
3210 | elfcpp::PF_W, // segment_flags_set | |
3211 | elfcpp::PF(0), // segment_flags_clear | |
3212 | 0, // value | |
3213 | 0, // size | |
3214 | elfcpp::STT_NOTYPE, // type | |
3215 | elfcpp::STB_GLOBAL, // binding | |
3216 | elfcpp::STV_HIDDEN, // visibility | |
3217 | 0, // nonvis | |
3218 | Symbol::SEGMENT_START, // offset_from_base | |
3219 | true // only_if_ref | |
3220 | } | |
3221 | }; | |
3222 | ||
3223 | symtab->define_symbols(layout, 2, syms, | |
3224 | layout->script_options()->saw_sections_clause()); | |
3225 | } | |
3226 | ||
053a4d68 JY |
3227 | return; |
3228 | } | |
3229 | ||
3230 | // Perform a relocation. | |
3231 | ||
3232 | template<int size, bool big_endian> | |
3233 | inline bool | |
3234 | Target_aarch64<size, big_endian>::Relocate::relocate( | |
9363c7c3 JY |
3235 | const Relocate_info<size, big_endian>* relinfo, |
3236 | Target_aarch64<size, big_endian>* target, | |
053a4d68 | 3237 | Output_section* , |
9363c7c3 JY |
3238 | size_t relnum, |
3239 | const elfcpp::Rela<size, big_endian>& rela, | |
3240 | unsigned int r_type, | |
3241 | const Sized_symbol<size>* gsym, | |
3242 | const Symbol_value<size>* psymval, | |
3243 | unsigned char* view, | |
3244 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
053a4d68 JY |
3245 | section_size_type /* view_size */) |
3246 | { | |
9363c7c3 JY |
3247 | if (view == NULL) |
3248 | return true; | |
3249 | ||
3250 | typedef AArch64_relocate_functions<size, big_endian> Reloc; | |
3251 | ||
3252 | const AArch64_reloc_property* reloc_property = | |
3253 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
3254 | ||
3255 | if (reloc_property == NULL) | |
3256 | { | |
3257 | std::string reloc_name = | |
3258 | aarch64_reloc_property_table->reloc_name_in_error_message(r_type); | |
3259 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3260 | _("cannot relocate %s in object file"), | |
3261 | reloc_name.c_str()); | |
3262 | return true; | |
3263 | } | |
3264 | ||
3265 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; | |
3266 | ||
3267 | // Pick the value to use for symbols defined in the PLT. | |
3268 | Symbol_value<size> symval; | |
3269 | if (gsym != NULL | |
3270 | && gsym->use_plt_offset(reloc_property->reference_flags())) | |
3271 | { | |
3272 | symval.set_output_value(target->plt_address_for_global(gsym)); | |
3273 | psymval = &symval; | |
3274 | } | |
3275 | else if (gsym == NULL && psymval->is_ifunc_symbol()) | |
3276 | { | |
3277 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3278 | if (object->local_has_plt_offset(r_sym)) | |
3279 | { | |
3280 | symval.set_output_value(target->plt_address_for_local(object, r_sym)); | |
3281 | psymval = &symval; | |
3282 | } | |
3283 | } | |
3284 | ||
3285 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3286 | ||
3287 | // Get the GOT offset if needed. | |
3288 | // For aarch64, the GOT pointer points to the start of the GOT section. | |
3289 | bool have_got_offset = false; | |
3290 | int got_offset = 0; | |
3291 | int got_base = (target->got_ != NULL | |
3292 | ? (target->got_->current_data_size() >= 0x8000 | |
3293 | ? 0x8000 : 0) | |
3294 | : 0); | |
3295 | switch (r_type) | |
3296 | { | |
3297 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0: | |
3298 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0_NC: | |
3299 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1: | |
3300 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1_NC: | |
3301 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2: | |
3302 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2_NC: | |
3303 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G3: | |
3304 | case elfcpp::R_AARCH64_GOTREL64: | |
3305 | case elfcpp::R_AARCH64_GOTREL32: | |
3306 | case elfcpp::R_AARCH64_GOT_LD_PREL19: | |
3307 | case elfcpp::R_AARCH64_LD64_GOTOFF_LO15: | |
3308 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
3309 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
3310 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: | |
3311 | if (gsym != NULL) | |
3312 | { | |
3313 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
3314 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD) - got_base; | |
3315 | } | |
3316 | else | |
3317 | { | |
3318 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3319 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
3320 | got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD) | |
3321 | - got_base); | |
3322 | } | |
3323 | have_got_offset = true; | |
3324 | break; | |
8e33481e | 3325 | |
9363c7c3 JY |
3326 | default: |
3327 | break; | |
3328 | } | |
3329 | ||
3330 | typename Reloc::Status reloc_status = Reloc::STATUS_OKAY; | |
3331 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
3332 | switch (r_type) | |
3333 | { | |
3334 | case elfcpp::R_AARCH64_NONE: | |
3335 | break; | |
3336 | ||
3337 | case elfcpp::R_AARCH64_ABS64: | |
3338 | reloc_status = Reloc::template rela_ua<64>( | |
3339 | view, object, psymval, addend, reloc_property); | |
3340 | break; | |
3341 | ||
3342 | case elfcpp::R_AARCH64_ABS32: | |
3343 | reloc_status = Reloc::template rela_ua<32>( | |
3344 | view, object, psymval, addend, reloc_property); | |
3345 | break; | |
3346 | ||
3347 | case elfcpp::R_AARCH64_ABS16: | |
3348 | reloc_status = Reloc::template rela_ua<16>( | |
3349 | view, object, psymval, addend, reloc_property); | |
3350 | break; | |
3351 | ||
3352 | case elfcpp::R_AARCH64_PREL64: | |
3353 | reloc_status = Reloc::template pcrela_ua<64>( | |
3354 | view, object, psymval, addend, address, reloc_property); | |
3355 | ||
3356 | case elfcpp::R_AARCH64_PREL32: | |
3357 | reloc_status = Reloc::template pcrela_ua<32>( | |
3358 | view, object, psymval, addend, address, reloc_property); | |
3359 | ||
3360 | case elfcpp::R_AARCH64_PREL16: | |
3361 | reloc_status = Reloc::template pcrela_ua<16>( | |
3362 | view, object, psymval, addend, address, reloc_property); | |
3363 | ||
3364 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: | |
3365 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: | |
3366 | reloc_status = Reloc::adrp(view, object, psymval, addend, address, | |
3367 | reloc_property); | |
3368 | break; | |
3369 | ||
3370 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: | |
3371 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: | |
3372 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: | |
3373 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: | |
3374 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: | |
3375 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: | |
3376 | reloc_status = Reloc::template rela_general<32>( | |
3377 | view, object, psymval, addend, reloc_property); | |
3378 | break; | |
3379 | ||
3a531937 JY |
3380 | case elfcpp::R_AARCH64_CALL26: |
3381 | if (this->skip_call_tls_get_addr_) | |
3382 | { | |
3383 | // Double check that the TLSGD insn has been optimized away. | |
3384 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
3385 | Insntype insn = elfcpp::Swap<32, big_endian>::readval( | |
3386 | reinterpret_cast<Insntype*>(view)); | |
3387 | gold_assert((insn & 0xff000000) == 0x91000000); | |
3388 | ||
3389 | reloc_status = Reloc::STATUS_OKAY; | |
3390 | this->skip_call_tls_get_addr_ = false; | |
3391 | // Return false to stop further processing this reloc. | |
3392 | return false; | |
3393 | } | |
3394 | // Continue. | |
8e33481e HS |
3395 | case elfcpp::R_AARCH64_TSTBR14: |
3396 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
3397 | case elfcpp::R_AARCH64_JUMP26: |
3398 | reloc_status = Reloc::template pcrela_general<32>( | |
3399 | view, object, psymval, addend, address, reloc_property); | |
3400 | break; | |
3401 | ||
3402 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
3403 | gold_assert(have_got_offset); | |
3404 | value = target->got_->address() + got_base + got_offset; | |
3405 | reloc_status = Reloc::adrp(view, value + addend, address); | |
3406 | break; | |
3407 | ||
3408 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
3409 | gold_assert(have_got_offset); | |
3410 | value = target->got_->address() + got_base + got_offset; | |
3411 | reloc_status = Reloc::template rela_general<32>( | |
3412 | view, value, addend, reloc_property); | |
3413 | break; | |
3414 | ||
3a531937 JY |
3415 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
3416 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
8e33481e HS |
3417 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3418 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
8e33481e HS |
3419 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
3420 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3421 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3a531937 JY |
3422 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
3423 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
3424 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
3425 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
8e33481e HS |
3426 | reloc_status = relocate_tls(relinfo, target, relnum, rela, r_type, |
3427 | gsym, psymval, view, address); | |
3428 | break; | |
3429 | ||
3a531937 JY |
3430 | // These are dynamic relocations, which are unexpected when linking. |
3431 | case elfcpp::R_AARCH64_COPY: | |
3432 | case elfcpp::R_AARCH64_GLOB_DAT: | |
3433 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
3434 | case elfcpp::R_AARCH64_RELATIVE: | |
3435 | case elfcpp::R_AARCH64_IRELATIVE: | |
3436 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
3437 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
3438 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
3439 | case elfcpp::R_AARCH64_TLSDESC: | |
9363c7c3 | 3440 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
3a531937 | 3441 | _("unexpected reloc %u in object file"), |
9363c7c3 JY |
3442 | r_type); |
3443 | break; | |
3a531937 JY |
3444 | |
3445 | default: | |
3446 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3447 | _("unsupported reloc %s"), | |
3448 | reloc_property->name().c_str()); | |
3449 | break; | |
9363c7c3 JY |
3450 | } |
3451 | ||
3452 | // Report any errors. | |
3453 | switch (reloc_status) | |
3454 | { | |
3455 | case Reloc::STATUS_OKAY: | |
3456 | break; | |
3457 | case Reloc::STATUS_OVERFLOW: | |
3458 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3459 | _("relocation overflow in %s"), | |
3460 | reloc_property->name().c_str()); | |
3461 | break; | |
3462 | case Reloc::STATUS_BAD_RELOC: | |
3463 | gold_error_at_location( | |
3464 | relinfo, | |
3465 | relnum, | |
3466 | rela.get_r_offset(), | |
3467 | _("unexpected opcode while processing relocation %s"), | |
3468 | reloc_property->name().c_str()); | |
3469 | break; | |
3470 | default: | |
3471 | gold_unreachable(); | |
3472 | } | |
3473 | ||
053a4d68 JY |
3474 | return true; |
3475 | } | |
3476 | ||
3a531937 | 3477 | |
8e33481e HS |
3478 | template<int size, bool big_endian> |
3479 | inline | |
3480 | typename AArch64_relocate_functions<size,big_endian>::Status | |
3481 | Target_aarch64<size, big_endian>::Relocate::relocate_tls( | |
3a531937 JY |
3482 | const Relocate_info<size,big_endian>* relinfo, |
3483 | Target_aarch64<size, big_endian>* target, | |
3484 | size_t relnum, | |
3485 | const elfcpp::Rela<size, big_endian>& rela, | |
3486 | unsigned int r_type, const Sized_symbol<size>* gsym, | |
3487 | const Symbol_value<size>* psymval, | |
3488 | unsigned char* view, | |
8e33481e HS |
3489 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
3490 | { | |
3491 | typedef AArch64_relocate_functions<size,big_endian> aarch64_reloc_funcs; | |
3a531937 | 3492 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; |
8e33481e | 3493 | |
3a531937 JY |
3494 | Output_segment* tls_segment = relinfo->layout->tls_segment(); |
3495 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3496 | const AArch64_reloc_property* reloc_property = | |
3497 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
8e33481e HS |
3498 | gold_assert(reloc_property != NULL); |
3499 | ||
3a531937 JY |
3500 | const bool is_final = (gsym == NULL |
3501 | ? !parameters->options().shared() | |
3502 | : gsym->final_value_is_known()); | |
3503 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
3504 | optimize_tls_reloc(is_final, r_type); | |
3505 | ||
3506 | Sized_relobj_file<size,big_endian>* object = relinfo->object; | |
3507 | int tls_got_offset_type; | |
8e33481e HS |
3508 | switch (r_type) |
3509 | { | |
3a531937 JY |
3510 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
3511 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // Global-dynamic | |
3512 | { | |
3513 | if (tlsopt == tls::TLSOPT_TO_LE) | |
3514 | { | |
3515 | if (tls_segment == NULL) | |
3516 | { | |
3517 | gold_assert(parameters->errors()->error_count() > 0 | |
3518 | || issue_undefined_symbol_error(gsym)); | |
3519 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3520 | } | |
3521 | return tls_gd_to_le(relinfo, target, rela, r_type, view, | |
3522 | psymval); | |
3523 | } | |
3524 | else if (tlsopt == tls::TLSOPT_NONE) | |
3525 | { | |
3526 | tls_got_offset_type = GOT_TYPE_TLS_PAIR; | |
3527 | // Firstly get the address for the got entry. | |
3528 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
3529 | if (gsym != NULL) | |
3530 | { | |
3531 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
3532 | got_entry_address = target->got_->address() + | |
3533 | gsym->got_offset(tls_got_offset_type); | |
3534 | } | |
3535 | else | |
3536 | { | |
3537 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3538 | gold_assert( | |
3539 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
3540 | got_entry_address = target->got_->address() + | |
3541 | object->local_got_offset(r_sym, tls_got_offset_type); | |
3542 | } | |
3543 | ||
3544 | // Relocate the address into adrp/ld, adrp/add pair. | |
3545 | switch (r_type) | |
3546 | { | |
3547 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
3548 | return aarch64_reloc_funcs::adrp( | |
3549 | view, got_entry_address + addend, address); | |
3550 | ||
3551 | break; | |
3552 | ||
3553 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
3554 | return aarch64_reloc_funcs::template rela_general<32>( | |
3555 | view, got_entry_address, addend, reloc_property); | |
3556 | break; | |
3557 | ||
3558 | default: | |
3559 | gold_assert(false); | |
3560 | } | |
3561 | } | |
3562 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
3563 | _("unsupported gd_to_ie relaxation on %u"), | |
3564 | r_type); | |
3565 | } | |
3566 | break; | |
3567 | ||
8e33481e | 3568 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 3569 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial-exec |
8e33481e | 3570 | { |
3a531937 JY |
3571 | if (tlsopt == tls::TLSOPT_TO_LE) |
3572 | { | |
3573 | if (tls_segment == NULL) | |
3574 | { | |
3575 | gold_assert(parameters->errors()->error_count() > 0 | |
3576 | || issue_undefined_symbol_error(gsym)); | |
3577 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3578 | } | |
3579 | return tls_ie_to_le(relinfo, target, rela, r_type, view, | |
3580 | psymval); | |
3581 | } | |
3582 | tls_got_offset_type = GOT_TYPE_TLS_OFFSET; | |
3583 | ||
3584 | // Firstly get the address for the got entry. | |
8e33481e HS |
3585 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; |
3586 | if (gsym != NULL) | |
3587 | { | |
3a531937 | 3588 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); |
8e33481e | 3589 | got_entry_address = target->got_->address() + |
3a531937 | 3590 | gsym->got_offset(tls_got_offset_type); |
8e33481e HS |
3591 | } |
3592 | else | |
3593 | { | |
3594 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3595 | gold_assert( | |
3a531937 | 3596 | object->local_has_got_offset(r_sym, tls_got_offset_type)); |
8e33481e | 3597 | got_entry_address = target->got_->address() + |
3a531937 | 3598 | object->local_got_offset(r_sym, tls_got_offset_type); |
8e33481e | 3599 | } |
3a531937 JY |
3600 | // Relocate the address into adrp/ld, adrp/add pair. |
3601 | switch (r_type) | |
8e33481e | 3602 | { |
3a531937 JY |
3603 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3604 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
3605 | address); | |
3606 | break; | |
3607 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3608 | return aarch64_reloc_funcs::template rela_general<32>( | |
3609 | view, got_entry_address, addend, reloc_property); | |
3610 | default: | |
3611 | gold_assert(false); | |
8e33481e | 3612 | } |
8e33481e | 3613 | } |
3a531937 | 3614 | // We shall never reach here. |
8e33481e HS |
3615 | break; |
3616 | ||
3617 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
3618 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3619 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3620 | { | |
8e33481e | 3621 | gold_assert(tls_segment != NULL); |
3a531937 | 3622 | AArch64_address value = psymval->value(object, 0); |
8e33481e HS |
3623 | |
3624 | if (!parameters->options().shared()) | |
3625 | { | |
3a531937 JY |
3626 | AArch64_address aligned_tcb_size = |
3627 | align_address(target->tcb_size(), | |
3628 | tls_segment->maximum_alignment()); | |
8e33481e HS |
3629 | return aarch64_reloc_funcs::template |
3630 | rela_general<32>(view, | |
3631 | value + aligned_tcb_size, | |
3632 | addend, | |
3633 | reloc_property); | |
3634 | } | |
3635 | else | |
3636 | gold_error(_("%s: unsupported reloc %u " | |
3637 | "in non-static TLSLE mode."), | |
3638 | object->name().c_str(), r_type); | |
3639 | } | |
3640 | break; | |
3641 | ||
3a531937 JY |
3642 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
3643 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
3644 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
3645 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
3646 | { | |
3647 | if (tlsopt == tls::TLSOPT_TO_LE) | |
3648 | { | |
3649 | if (tls_segment == NULL) | |
3650 | { | |
3651 | gold_assert(parameters->errors()->error_count() > 0 | |
3652 | || issue_undefined_symbol_error(gsym)); | |
3653 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3654 | } | |
3655 | return tls_desc_gd_to_le(relinfo, target, rela, r_type, | |
3656 | view, psymval); | |
3657 | } | |
3658 | else | |
3659 | { | |
3660 | tls_got_offset_type = (tlsopt == tls::TLSOPT_TO_IE | |
3661 | ? GOT_TYPE_TLS_OFFSET | |
3662 | : GOT_TYPE_TLS_DESC); | |
3663 | unsigned int got_tlsdesc_offset = 0; | |
3664 | if (r_type != elfcpp::R_AARCH64_TLSDESC_CALL | |
3665 | && tlsopt == tls::TLSOPT_NONE) | |
3666 | { | |
3667 | // We created GOT entries in the .got.tlsdesc portion of the | |
3668 | // .got.plt section, but the offset stored in the symbol is the | |
3669 | // offset within .got.tlsdesc. | |
3670 | got_tlsdesc_offset = (target->got_->data_size() | |
3671 | + target->got_plt_section()->data_size()); | |
3672 | } | |
3673 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
3674 | if (gsym != NULL) | |
3675 | { | |
3676 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
3677 | got_entry_address = target->got_->address() | |
3678 | + got_tlsdesc_offset | |
3679 | + gsym->got_offset(tls_got_offset_type); | |
3680 | } | |
3681 | else | |
3682 | { | |
3683 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
3684 | gold_assert( | |
3685 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
3686 | got_entry_address = target->got_->address() + | |
3687 | got_tlsdesc_offset + | |
3688 | object->local_got_offset(r_sym, tls_got_offset_type); | |
3689 | } | |
3690 | if (tlsopt == tls::TLSOPT_TO_IE) | |
3691 | { | |
3692 | if (tls_segment == NULL) | |
3693 | { | |
3694 | gold_assert(parameters->errors()->error_count() > 0 | |
3695 | || issue_undefined_symbol_error(gsym)); | |
3696 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3697 | } | |
3698 | return tls_desc_gd_to_ie(relinfo, target, rela, r_type, | |
3699 | view, psymval, got_entry_address, | |
3700 | address); | |
3701 | } | |
3702 | ||
3703 | // Now do tlsdesc relocation. | |
3704 | switch (r_type) | |
3705 | { | |
3706 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
3707 | return aarch64_reloc_funcs::adrp(view, | |
3708 | got_entry_address + addend, | |
3709 | address); | |
3710 | break; | |
3711 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
3712 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
3713 | return aarch64_reloc_funcs::template rela_general<32>( | |
3714 | view, got_entry_address, addend, reloc_property); | |
3715 | break; | |
3716 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
3717 | return aarch64_reloc_funcs::STATUS_OKAY; | |
3718 | break; | |
3719 | default: | |
3720 | gold_unreachable(); | |
3721 | } | |
3722 | } | |
3723 | } | |
3724 | break; | |
3725 | ||
8e33481e HS |
3726 | default: |
3727 | gold_error(_("%s: unsupported TLS reloc %u."), | |
3728 | object->name().c_str(), r_type); | |
3729 | } | |
3730 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3a531937 JY |
3731 | } // End of relocate_tls. |
3732 | ||
3733 | ||
3734 | template<int size, bool big_endian> | |
3735 | inline | |
3736 | typename AArch64_relocate_functions<size,big_endian>::Status | |
3737 | Target_aarch64<size, big_endian>::Relocate::tls_gd_to_le( | |
3738 | const Relocate_info<size,big_endian>* relinfo, | |
3739 | Target_aarch64<size, big_endian>* target, | |
3740 | const elfcpp::Rela<size, big_endian>& rela, | |
3741 | unsigned int r_type, | |
3742 | unsigned char* view, | |
3743 | const Symbol_value<size>* psymval) | |
3744 | { | |
3745 | typedef AArch64_relocate_functions<size,big_endian> aarch64_reloc_funcs; | |
3746 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
3747 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
3748 | ||
3749 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
3750 | Insntype insn1 = elfcpp::Swap<32, big_endian>::readval(ip); | |
3751 | Insntype insn2 = elfcpp::Swap<32, big_endian>::readval(ip + 1); | |
3752 | Insntype insn3 = elfcpp::Swap<32, big_endian>::readval(ip + 2); | |
3753 | ||
3754 | if (r_type == elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC) | |
3755 | { | |
3756 | // This is the 2nd relocs, optimization should already have been | |
3757 | // done. | |
3758 | gold_assert((insn1 & 0xfff00000) == 0x91400000); | |
3759 | return aarch64_reloc_funcs::STATUS_OKAY; | |
3760 | } | |
3761 | ||
3762 | // The original sequence is - | |
3763 | // 90000000 adrp x0, 0 <main> | |
3764 | // 91000000 add x0, x0, #0x0 | |
3765 | // 94000000 bl 0 <__tls_get_addr> | |
3766 | // optimized to sequence - | |
3767 | // d53bd040 mrs x0, tpidr_el0 | |
3768 | // 91400000 add x0, x0, #0x0, lsl #12 | |
3769 | // 91000000 add x0, x0, #0x0 | |
3770 | ||
3771 | // Unlike tls_ie_to_le, we change the 3 insns in one function call when we | |
3772 | // encounter the first relocation "R_AARCH64_TLSGD_ADR_PAGE21". Because we | |
3773 | // have to change "bl tls_get_addr", which does not have a corresponding tls | |
3774 | // relocation type. So before proceeding, we need to make sure compiler | |
3775 | // does not change the sequence. | |
3776 | if(!(insn1 == 0x90000000 // adrp x0,0 | |
3777 | && insn2 == 0x91000000 // add x0, x0, #0x0 | |
3778 | && insn3 == 0x94000000)) // bl 0 | |
3779 | { | |
3780 | // Ideally we should give up gd_to_le relaxation and do gd access. | |
3781 | // However the gd_to_le relaxation decision has been made early | |
3782 | // in the scan stage, where we did not allocate any GOT entry for | |
3783 | // this symbol. Therefore we have to exit and report error now. | |
3784 | gold_error(_("unexpected reloc insn sequence while relaxing " | |
3785 | "tls gd to le for reloc %u."), r_type); | |
3786 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3787 | } | |
3788 | ||
3789 | // Write new insns. | |
3790 | insn1 = 0xd53bd040; // mrs x0, tpidr_el0 | |
3791 | insn2 = 0x91400000; // add x0, x0, #0x0, lsl #12 | |
3792 | insn3 = 0x91000000; // add x0, x0, #0x0 | |
3793 | elfcpp::Swap<32, big_endian>::writeval(ip, insn1); | |
3794 | elfcpp::Swap<32, big_endian>::writeval(ip + 1, insn2); | |
3795 | elfcpp::Swap<32, big_endian>::writeval(ip + 2, insn3); | |
3796 | ||
3797 | // Calculate tprel value. | |
3798 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
3799 | gold_assert(tls_segment != NULL); | |
3800 | AArch64_address value = psymval->value(relinfo->object, 0); | |
3801 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3802 | AArch64_address aligned_tcb_size = | |
3803 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
3804 | AArch64_address x = value + aligned_tcb_size; | |
3805 | ||
3806 | // After new insns are written, apply TLSLE relocs. | |
3807 | const AArch64_reloc_property* rp1 = | |
3808 | aarch64_reloc_property_table->get_reloc_property( | |
3809 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12); | |
3810 | const AArch64_reloc_property* rp2 = | |
3811 | aarch64_reloc_property_table->get_reloc_property( | |
3812 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12); | |
3813 | gold_assert(rp1 != NULL && rp2 != NULL); | |
3814 | ||
3815 | typename aarch64_reloc_funcs::Status s1 = | |
3816 | aarch64_reloc_funcs::template rela_general<32>(view + 4, | |
3817 | x, | |
3818 | addend, | |
3819 | rp1); | |
3820 | if (s1 != aarch64_reloc_funcs::STATUS_OKAY) | |
3821 | return s1; | |
3822 | ||
3823 | typename aarch64_reloc_funcs::Status s2 = | |
3824 | aarch64_reloc_funcs::template rela_general<32>(view + 8, | |
3825 | x, | |
3826 | addend, | |
3827 | rp2); | |
3828 | ||
3829 | this->skip_call_tls_get_addr_ = true; | |
3830 | return s2; | |
3831 | } // End of tls_gd_to_le | |
3832 | ||
3833 | ||
3834 | template<int size, bool big_endian> | |
3835 | inline | |
3836 | typename AArch64_relocate_functions<size,big_endian>::Status | |
3837 | Target_aarch64<size, big_endian>::Relocate::tls_ie_to_le( | |
3838 | const Relocate_info<size,big_endian>* relinfo, | |
3839 | Target_aarch64<size, big_endian>* target, | |
3840 | const elfcpp::Rela<size, big_endian>& rela, | |
3841 | unsigned int r_type, | |
3842 | unsigned char* view, | |
3843 | const Symbol_value<size>* psymval) | |
3844 | { | |
3845 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
3846 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
3847 | typedef AArch64_relocate_functions<size,big_endian> aarch64_reloc_funcs; | |
3848 | ||
3849 | AArch64_address value = psymval->value(relinfo->object, 0); | |
3850 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
3851 | AArch64_address aligned_tcb_address = | |
3852 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
3853 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3854 | AArch64_address x = value + addend + aligned_tcb_address; | |
3855 | // "x" is the offset to tp, we can only do this if x is within | |
3856 | // range [0, 2^32-1] | |
3857 | if (!(size == 32 || (size == 64 && (static_cast<uint64_t>(x) >> 32) == 0))) | |
3858 | { | |
3859 | gold_error(_("TLS variable referred by reloc %u is too far from TP."), | |
3860 | r_type); | |
3861 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3862 | } | |
3863 | ||
3864 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
3865 | Insntype insn = elfcpp::Swap<32, big_endian>::readval(ip); | |
3866 | unsigned int regno; | |
3867 | Insntype newinsn; | |
3868 | if (r_type == elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21) | |
3869 | { | |
3870 | // Generate movz. | |
3871 | regno = (insn & 0x1f); | |
3872 | newinsn = (0xd2a00000 | regno) | (((x >> 16) & 0xffff) << 5); | |
3873 | } | |
3874 | else if (r_type == elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC) | |
3875 | { | |
3876 | // Generate movk. | |
3877 | regno = (insn & 0x1f); | |
3878 | gold_assert(regno == ((insn >> 5) & 0x1f)); | |
3879 | newinsn = (0xf2800000 | regno) | ((x & 0xffff) << 5); | |
3880 | } | |
3881 | else | |
3882 | gold_assert(false); | |
3883 | ||
3884 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
3885 | return aarch64_reloc_funcs::STATUS_OKAY; | |
3886 | } // End of tls_ie_to_le | |
3887 | ||
3888 | ||
3889 | template<int size, bool big_endian> | |
3890 | inline | |
3891 | typename AArch64_relocate_functions<size,big_endian>::Status | |
3892 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_le( | |
3893 | const Relocate_info<size,big_endian>* relinfo, | |
3894 | Target_aarch64<size, big_endian>* target, | |
3895 | const elfcpp::Rela<size, big_endian>& rela, | |
3896 | unsigned int r_type, | |
3897 | unsigned char* view, | |
3898 | const Symbol_value<size>* psymval) | |
3899 | { | |
3900 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
3901 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
3902 | typedef AArch64_relocate_functions<size,big_endian> aarch64_reloc_funcs; | |
3903 | ||
3904 | // TLSDESC-GD sequence is like: | |
3905 | // adrp x0, :tlsdesc:v1 | |
3906 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
3907 | // add x0, x0, :tlsdesc_lo12:v1 | |
3908 | // .tlsdesccall v1 | |
3909 | // blr x1 | |
3910 | // After desc_gd_to_le optimization, the sequence will be like: | |
3911 | // movz x0, #0x0, lsl #16 | |
3912 | // movk x0, #0x10 | |
3913 | // nop | |
3914 | // nop | |
3915 | ||
3916 | // Calculate tprel value. | |
3917 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
3918 | gold_assert(tls_segment != NULL); | |
3919 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
3920 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3921 | AArch64_address value = psymval->value(relinfo->object, addend); | |
3922 | AArch64_address aligned_tcb_size = | |
3923 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
3924 | AArch64_address x = value + aligned_tcb_size; | |
3925 | // x is the offset to tp, we can only do this if x is within range | |
3926 | // [0, 2^32-1]. If x is out of range, fail and exit. | |
3927 | if (size == 64 && (static_cast<uint64_t>(x) >> 32) != 0) | |
3928 | { | |
3929 | gold_error(_("TLS variable referred by reloc %u is too far from TP. " | |
3930 | "We Can't do gd_to_le relaxation.\n"), r_type); | |
3931 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3932 | } | |
3933 | Insntype newinsn; | |
3934 | switch (r_type) | |
3935 | { | |
3936 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
3937 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
3938 | // Change to nop | |
3939 | newinsn = 0xd503201f; | |
3940 | break; | |
3941 | ||
3942 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
3943 | // Change to movz. | |
3944 | newinsn = 0xd2a00000 | (((x >> 16) & 0xffff) << 5); | |
3945 | break; | |
3946 | ||
3947 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
3948 | // Change to movk. | |
3949 | newinsn = 0xf2800000 | ((x & 0xffff) << 5); | |
3950 | break; | |
3951 | ||
3952 | default: | |
3953 | gold_error(_("unsupported tlsdesc gd_to_le optimization on reloc %u"), | |
3954 | r_type); | |
3955 | gold_unreachable(); | |
3956 | } | |
3957 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
3958 | return aarch64_reloc_funcs::STATUS_OKAY; | |
3959 | } // End of tls_desc_gd_to_le | |
3960 | ||
3961 | ||
3962 | template<int size, bool big_endian> | |
3963 | inline | |
3964 | typename AArch64_relocate_functions<size,big_endian>::Status | |
3965 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_ie( | |
3966 | const Relocate_info<size,big_endian>* /* relinfo */, | |
3967 | Target_aarch64<size, big_endian>* /* target */, | |
3968 | const elfcpp::Rela<size, big_endian>& rela, | |
3969 | unsigned int r_type, | |
3970 | unsigned char* view, | |
3971 | const Symbol_value<size>* /* psymval */, | |
3972 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address, | |
3973 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
3974 | { | |
3975 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
3976 | typedef AArch64_relocate_functions<size,big_endian> aarch64_reloc_funcs; | |
3977 | ||
3978 | // TLSDESC-GD sequence is like: | |
3979 | // adrp x0, :tlsdesc:v1 | |
3980 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
3981 | // add x0, x0, :tlsdesc_lo12:v1 | |
3982 | // .tlsdesccall v1 | |
3983 | // blr x1 | |
3984 | // After desc_gd_to_ie optimization, the sequence will be like: | |
3985 | // adrp x0, :tlsie:v1 | |
3986 | // ldr x0, [x0, :tlsie_lo12:v1] | |
3987 | // nop | |
3988 | // nop | |
3989 | ||
3990 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
3991 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
3992 | Insntype newinsn; | |
3993 | switch (r_type) | |
3994 | { | |
3995 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
3996 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
3997 | // Change to nop | |
3998 | newinsn = 0xd503201f; | |
3999 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
4000 | break; | |
4001 | ||
4002 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
4003 | { | |
4004 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
4005 | address); | |
4006 | } | |
4007 | break; | |
4008 | ||
4009 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
4010 | { | |
4011 | const AArch64_reloc_property* reloc_property = | |
4012 | aarch64_reloc_property_table->get_reloc_property( | |
4013 | elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC); | |
4014 | return aarch64_reloc_funcs::template rela_general<32>( | |
4015 | view, got_entry_address, addend, reloc_property); | |
4016 | } | |
4017 | break; | |
8e33481e | 4018 | |
3a531937 JY |
4019 | default: |
4020 | gold_error(_("Don't support tlsdesc gd_to_ie optimization on reloc %u"), | |
4021 | r_type); | |
4022 | gold_unreachable(); | |
4023 | } | |
4024 | return aarch64_reloc_funcs::STATUS_OKAY; | |
4025 | } // End of tls_desc_gd_to_ie | |
8e33481e | 4026 | |
053a4d68 JY |
4027 | // Relocate section data. |
4028 | ||
4029 | template<int size, bool big_endian> | |
4030 | void | |
4031 | Target_aarch64<size, big_endian>::relocate_section( | |
9363c7c3 | 4032 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 4033 | unsigned int sh_type, |
9363c7c3 JY |
4034 | const unsigned char* prelocs, |
4035 | size_t reloc_count, | |
4036 | Output_section* output_section, | |
4037 | bool needs_special_offset_handling, | |
4038 | unsigned char* view, | |
4039 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
4040 | section_size_type view_size, | |
4041 | const Reloc_symbol_changes* reloc_symbol_changes) | |
053a4d68 | 4042 | { |
053a4d68 | 4043 | gold_assert(sh_type == elfcpp::SHT_RELA); |
9363c7c3 JY |
4044 | typedef typename Target_aarch64<size, big_endian>::Relocate AArch64_relocate; |
4045 | gold::relocate_section<size, big_endian, Target_aarch64, elfcpp::SHT_RELA, | |
4046 | AArch64_relocate, gold::Default_comdat_behavior>( | |
4047 | relinfo, | |
4048 | this, | |
4049 | prelocs, | |
4050 | reloc_count, | |
4051 | output_section, | |
4052 | needs_special_offset_handling, | |
4053 | view, | |
4054 | address, | |
4055 | view_size, | |
4056 | reloc_symbol_changes); | |
053a4d68 JY |
4057 | } |
4058 | ||
4059 | // Return the size of a relocation while scanning during a relocatable | |
4060 | // link. | |
4061 | ||
4062 | template<int size, bool big_endian> | |
4063 | unsigned int | |
4064 | Target_aarch64<size, big_endian>::Relocatable_size_for_reloc:: | |
4065 | get_size_for_reloc( | |
4066 | unsigned int , | |
4067 | Relobj* ) | |
4068 | { | |
4069 | // We will never support SHT_REL relocations. | |
4070 | gold_unreachable(); | |
4071 | return 0; | |
4072 | } | |
4073 | ||
4074 | // Scan the relocs during a relocatable link. | |
4075 | ||
4076 | template<int size, bool big_endian> | |
4077 | void | |
4078 | Target_aarch64<size, big_endian>::scan_relocatable_relocs( | |
8e33481e HS |
4079 | Symbol_table* symtab, |
4080 | Layout* layout, | |
4081 | Sized_relobj_file<size, big_endian>* object, | |
4082 | unsigned int data_shndx, | |
053a4d68 | 4083 | unsigned int sh_type, |
8e33481e HS |
4084 | const unsigned char* prelocs, |
4085 | size_t reloc_count, | |
4086 | Output_section* output_section, | |
4087 | bool needs_special_offset_handling, | |
4088 | size_t local_symbol_count, | |
4089 | const unsigned char* plocal_symbols, | |
4090 | Relocatable_relocs* rr) | |
053a4d68 | 4091 | { |
053a4d68 | 4092 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e HS |
4093 | |
4094 | typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, | |
4095 | Relocatable_size_for_reloc> Scan_relocatable_relocs; | |
4096 | ||
4097 | gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, | |
4098 | Scan_relocatable_relocs>( | |
4099 | symtab, | |
4100 | layout, | |
4101 | object, | |
4102 | data_shndx, | |
4103 | prelocs, | |
4104 | reloc_count, | |
4105 | output_section, | |
4106 | needs_special_offset_handling, | |
4107 | local_symbol_count, | |
4108 | plocal_symbols, | |
4109 | rr); | |
053a4d68 JY |
4110 | } |
4111 | ||
4112 | // Relocate a section during a relocatable link. | |
4113 | ||
4114 | template<int size, bool big_endian> | |
4115 | void | |
4116 | Target_aarch64<size, big_endian>::relocate_relocs( | |
8e33481e | 4117 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 4118 | unsigned int sh_type, |
8e33481e HS |
4119 | const unsigned char* prelocs, |
4120 | size_t reloc_count, | |
4121 | Output_section* output_section, | |
4122 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
4123 | const Relocatable_relocs* rr, | |
4124 | unsigned char* view, | |
4125 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
4126 | section_size_type view_size, | |
4127 | unsigned char* reloc_view, | |
4128 | section_size_type reloc_view_size) | |
053a4d68 | 4129 | { |
053a4d68 | 4130 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e HS |
4131 | |
4132 | gold::relocate_relocs<size, big_endian, elfcpp::SHT_RELA>( | |
4133 | relinfo, | |
4134 | prelocs, | |
4135 | reloc_count, | |
4136 | output_section, | |
4137 | offset_in_output_section, | |
4138 | rr, | |
4139 | view, | |
4140 | view_address, | |
4141 | view_size, | |
4142 | reloc_view, | |
4143 | reloc_view_size); | |
053a4d68 JY |
4144 | } |
4145 | ||
053a4d68 JY |
4146 | // The selector for aarch64 object files. |
4147 | ||
4148 | template<int size, bool big_endian> | |
4149 | class Target_selector_aarch64 : public Target_selector | |
4150 | { | |
4151 | public: | |
9363c7c3 | 4152 | Target_selector_aarch64(); |
053a4d68 JY |
4153 | |
4154 | virtual Target* | |
4155 | do_instantiate_target() | |
4156 | { return new Target_aarch64<size, big_endian>(); } | |
4157 | }; | |
4158 | ||
9363c7c3 JY |
4159 | template<> |
4160 | Target_selector_aarch64<32, true>::Target_selector_aarch64() | |
4161 | : Target_selector(elfcpp::EM_AARCH64, 32, true, | |
4162 | "elf32-bigaarch64", "aarch64_elf32_be_vec") | |
4163 | { } | |
4164 | ||
4165 | template<> | |
4166 | Target_selector_aarch64<32, false>::Target_selector_aarch64() | |
4167 | : Target_selector(elfcpp::EM_AARCH64, 32, false, | |
4168 | "elf32-littleaarch64", "aarch64_elf32_le_vec") | |
4169 | { } | |
4170 | ||
4171 | template<> | |
4172 | Target_selector_aarch64<64, true>::Target_selector_aarch64() | |
4173 | : Target_selector(elfcpp::EM_AARCH64, 64, true, | |
4174 | "elf64-bigaarch64", "aarch64_elf64_be_vec") | |
4175 | { } | |
4176 | ||
4177 | template<> | |
4178 | Target_selector_aarch64<64, false>::Target_selector_aarch64() | |
4179 | : Target_selector(elfcpp::EM_AARCH64, 64, false, | |
4180 | "elf64-littleaarch64", "aarch64_elf64_le_vec") | |
4181 | { } | |
4182 | ||
053a4d68 JY |
4183 | Target_selector_aarch64<32, true> target_selector_aarch64elf32b; |
4184 | Target_selector_aarch64<32, false> target_selector_aarch64elf32; | |
4185 | Target_selector_aarch64<64, true> target_selector_aarch64elfb; | |
4186 | Target_selector_aarch64<64, false> target_selector_aarch64elf; | |
4187 | ||
053a4d68 | 4188 | } // End anonymous namespace. |