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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
2571583a | 3 | // Copyright (C) 2008-2017 Free Software Foundation, Inc. |
42cacb20 DE |
4 | // Written by David S. Miller <davem@davemloft.net> |
5 | // and David Edelsohn <edelsohn@gnu.org> | |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
24 | #include "gold.h" | |
25 | ||
dc3714f3 | 26 | #include <set> |
ec661b9d | 27 | #include <algorithm> |
42cacb20 | 28 | #include "elfcpp.h" |
9d5781f8 | 29 | #include "dwarf.h" |
42cacb20 DE |
30 | #include "parameters.h" |
31 | #include "reloc.h" | |
32 | #include "powerpc.h" | |
33 | #include "object.h" | |
34 | #include "symtab.h" | |
35 | #include "layout.h" | |
36 | #include "output.h" | |
37 | #include "copy-relocs.h" | |
38 | #include "target.h" | |
39 | #include "target-reloc.h" | |
40 | #include "target-select.h" | |
41 | #include "tls.h" | |
42 | #include "errors.h" | |
f345227a | 43 | #include "gc.h" |
42cacb20 DE |
44 | |
45 | namespace | |
46 | { | |
47 | ||
48 | using namespace gold; | |
49 | ||
50 | template<int size, bool big_endian> | |
51 | class Output_data_plt_powerpc; | |
52 | ||
ec661b9d AM |
53 | template<int size, bool big_endian> |
54 | class Output_data_brlt_powerpc; | |
55 | ||
cf43a2fe AM |
56 | template<int size, bool big_endian> |
57 | class Output_data_got_powerpc; | |
58 | ||
59 | template<int size, bool big_endian> | |
60 | class Output_data_glink; | |
61 | ||
ec661b9d AM |
62 | template<int size, bool big_endian> |
63 | class Stub_table; | |
64 | ||
d49044c7 AM |
65 | template<int size, bool big_endian> |
66 | class Output_data_save_res; | |
67 | ||
a3e60ddb AM |
68 | template<int size, bool big_endian> |
69 | class Target_powerpc; | |
70 | ||
71 | struct Stub_table_owner | |
72 | { | |
dc60b26d AM |
73 | Stub_table_owner() |
74 | : output_section(NULL), owner(NULL) | |
75 | { } | |
76 | ||
a3e60ddb AM |
77 | Output_section* output_section; |
78 | const Output_section::Input_section* owner; | |
79 | }; | |
80 | ||
4d9aa155 AM |
81 | inline bool |
82 | is_branch_reloc(unsigned int r_type); | |
83 | ||
cf43a2fe AM |
84 | template<int size, bool big_endian> |
85 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
86 | { | |
87 | public: | |
dd93cd0a | 88 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
89 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
90 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 91 | |
cf43a2fe AM |
92 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
93 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
94 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
5edad15d AM |
95 | special_(0), relatoc_(0), toc_(0), no_toc_opt_(), |
96 | has_small_toc_reloc_(false), opd_valid_(false), opd_ent_(), | |
97 | access_from_map_(), has14_(), stub_table_index_(), | |
b4f7960d AM |
98 | e_flags_(ehdr.get_e_flags()), st_other_() |
99 | { | |
100 | this->set_abiversion(0); | |
101 | } | |
cf43a2fe AM |
102 | |
103 | ~Powerpc_relobj() | |
104 | { } | |
105 | ||
b4f7960d AM |
106 | // Read the symbols then set up st_other vector. |
107 | void | |
108 | do_read_symbols(Read_symbols_data*); | |
109 | ||
5edad15d AM |
110 | // Arrange to always relocate .toc first. |
111 | virtual void | |
112 | do_relocate_sections( | |
113 | const Symbol_table* symtab, const Layout* layout, | |
114 | const unsigned char* pshdrs, Output_file* of, | |
115 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
116 | ||
117 | // The .toc section index. | |
118 | unsigned int | |
119 | toc_shndx() const | |
120 | { | |
121 | return this->toc_; | |
122 | } | |
123 | ||
124 | // Mark .toc entry at OFF as not optimizable. | |
125 | void | |
126 | set_no_toc_opt(Address off) | |
127 | { | |
128 | if (this->no_toc_opt_.empty()) | |
129 | this->no_toc_opt_.resize(this->section_size(this->toc_shndx()) | |
130 | / (size / 8)); | |
131 | off /= size / 8; | |
132 | if (off < this->no_toc_opt_.size()) | |
133 | this->no_toc_opt_[off] = true; | |
134 | } | |
135 | ||
136 | // Mark the entire .toc as not optimizable. | |
137 | void | |
138 | set_no_toc_opt() | |
139 | { | |
140 | this->no_toc_opt_.resize(1); | |
141 | this->no_toc_opt_[0] = true; | |
142 | } | |
143 | ||
144 | // Return true if code using the .toc entry at OFF should not be edited. | |
145 | bool | |
146 | no_toc_opt(Address off) const | |
147 | { | |
148 | if (this->no_toc_opt_.empty()) | |
149 | return false; | |
150 | off /= size / 8; | |
151 | if (off >= this->no_toc_opt_.size()) | |
152 | return true; | |
153 | return this->no_toc_opt_[off]; | |
154 | } | |
155 | ||
c9269dff | 156 | // The .got2 section shndx. |
cf43a2fe AM |
157 | unsigned int |
158 | got2_shndx() const | |
159 | { | |
160 | if (size == 32) | |
c9269dff | 161 | return this->special_; |
cf43a2fe AM |
162 | else |
163 | return 0; | |
164 | } | |
165 | ||
c9269dff AM |
166 | // The .opd section shndx. |
167 | unsigned int | |
168 | opd_shndx() const | |
169 | { | |
170 | if (size == 32) | |
171 | return 0; | |
172 | else | |
173 | return this->special_; | |
174 | } | |
175 | ||
176 | // Init OPD entry arrays. | |
177 | void | |
178 | init_opd(size_t opd_size) | |
179 | { | |
180 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 181 | this->opd_ent_.resize(count); |
c9269dff AM |
182 | } |
183 | ||
184 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
185 | unsigned int |
186 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
187 | { |
188 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
189 | gold_assert(ndx < this->opd_ent_.size()); |
190 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 191 | if (value != NULL) |
bfdfa4cd AM |
192 | *value = this->opd_ent_[ndx].off; |
193 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
194 | } |
195 | ||
196 | // Set section and offset of function entry for .opd + R_OFF. | |
197 | void | |
dd93cd0a | 198 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
199 | { |
200 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
201 | gold_assert(ndx < this->opd_ent_.size()); |
202 | this->opd_ent_[ndx].shndx = shndx; | |
203 | this->opd_ent_[ndx].off = value; | |
204 | } | |
205 | ||
206 | // Return discard flag for .opd + R_OFF. | |
207 | bool | |
208 | get_opd_discard(Address r_off) const | |
209 | { | |
210 | size_t ndx = this->opd_ent_ndx(r_off); | |
211 | gold_assert(ndx < this->opd_ent_.size()); | |
212 | return this->opd_ent_[ndx].discard; | |
213 | } | |
214 | ||
215 | // Set discard flag for .opd + R_OFF. | |
216 | void | |
217 | set_opd_discard(Address r_off) | |
218 | { | |
219 | size_t ndx = this->opd_ent_ndx(r_off); | |
220 | gold_assert(ndx < this->opd_ent_.size()); | |
221 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
222 | } |
223 | ||
e81fea4d AM |
224 | bool |
225 | opd_valid() const | |
226 | { return this->opd_valid_; } | |
227 | ||
228 | void | |
229 | set_opd_valid() | |
230 | { this->opd_valid_ = true; } | |
231 | ||
c9269dff AM |
232 | // Examine .rela.opd to build info about function entry points. |
233 | void | |
234 | scan_opd_relocs(size_t reloc_count, | |
235 | const unsigned char* prelocs, | |
236 | const unsigned char* plocal_syms); | |
237 | ||
5edad15d AM |
238 | // Returns true if a code sequence loading a TOC entry can be |
239 | // converted into code calculating a TOC pointer relative offset. | |
240 | bool | |
241 | make_toc_relative(Target_powerpc<size, big_endian>* target, | |
242 | Address* value); | |
243 | ||
26a4e9cb AM |
244 | // Perform the Sized_relobj_file method, then set up opd info from |
245 | // .opd relocs. | |
c9269dff AM |
246 | void |
247 | do_read_relocs(Read_relocs_data*); | |
248 | ||
cf43a2fe AM |
249 | bool |
250 | do_find_special_sections(Read_symbols_data* sd); | |
251 | ||
ec4dbad3 AM |
252 | // Adjust this local symbol value. Return false if the symbol |
253 | // should be discarded from the output file. | |
254 | bool | |
255 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
256 | { | |
257 | if (size == 64 && this->opd_shndx() != 0) | |
258 | { | |
259 | bool is_ordinary; | |
260 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
261 | return true; | |
262 | if (this->get_opd_discard(lv->input_value())) | |
263 | return false; | |
264 | } | |
265 | return true; | |
266 | } | |
267 | ||
6c77229c AM |
268 | Access_from* |
269 | access_from_map() | |
270 | { return &this->access_from_map_; } | |
271 | ||
272 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
273 | // section at DST_OFF. | |
274 | void | |
efc6fa12 | 275 | add_reference(Relobj* src_obj, |
6c77229c AM |
276 | unsigned int src_indx, |
277 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
278 | { | |
279 | Section_id src_id(src_obj, src_indx); | |
280 | this->access_from_map_[dst_off].insert(src_id); | |
281 | } | |
282 | ||
283 | // Add a reference to the code section specified by the .opd entry | |
284 | // at DST_OFF | |
285 | void | |
286 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
287 | { | |
288 | size_t ndx = this->opd_ent_ndx(dst_off); | |
289 | if (ndx >= this->opd_ent_.size()) | |
290 | this->opd_ent_.resize(ndx + 1); | |
291 | this->opd_ent_[ndx].gc_mark = true; | |
292 | } | |
293 | ||
294 | void | |
295 | process_gc_mark(Symbol_table* symtab) | |
296 | { | |
297 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
298 | if (this->opd_ent_[i].gc_mark) | |
299 | { | |
300 | unsigned int shndx = this->opd_ent_[i].shndx; | |
4277535c | 301 | symtab->gc()->worklist().push_back(Section_id(this, shndx)); |
6c77229c AM |
302 | } |
303 | } | |
304 | ||
dd93cd0a AM |
305 | // Return offset in output GOT section that this object will use |
306 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
307 | Address | |
308 | toc_base_offset() const | |
309 | { return 0x8000; } | |
310 | ||
d8f5a274 AM |
311 | void |
312 | set_has_small_toc_reloc() | |
313 | { has_small_toc_reloc_ = true; } | |
314 | ||
315 | bool | |
316 | has_small_toc_reloc() const | |
317 | { return has_small_toc_reloc_; } | |
318 | ||
ec661b9d AM |
319 | void |
320 | set_has_14bit_branch(unsigned int shndx) | |
321 | { | |
322 | if (shndx >= this->has14_.size()) | |
323 | this->has14_.resize(shndx + 1); | |
324 | this->has14_[shndx] = true; | |
325 | } | |
326 | ||
327 | bool | |
328 | has_14bit_branch(unsigned int shndx) const | |
329 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
330 | ||
331 | void | |
a3e60ddb | 332 | set_stub_table(unsigned int shndx, unsigned int stub_index) |
ec661b9d | 333 | { |
a3e60ddb | 334 | if (shndx >= this->stub_table_index_.size()) |
dc60b26d | 335 | this->stub_table_index_.resize(shndx + 1, -1); |
a3e60ddb | 336 | this->stub_table_index_[shndx] = stub_index; |
ec661b9d AM |
337 | } |
338 | ||
339 | Stub_table<size, big_endian>* | |
340 | stub_table(unsigned int shndx) | |
341 | { | |
a3e60ddb AM |
342 | if (shndx < this->stub_table_index_.size()) |
343 | { | |
344 | Target_powerpc<size, big_endian>* target | |
345 | = static_cast<Target_powerpc<size, big_endian>*>( | |
346 | parameters->sized_target<size, big_endian>()); | |
347 | unsigned int indx = this->stub_table_index_[shndx]; | |
980d0cdd AM |
348 | if (indx < target->stub_tables().size()) |
349 | return target->stub_tables()[indx]; | |
a3e60ddb | 350 | } |
ec661b9d AM |
351 | return NULL; |
352 | } | |
353 | ||
a3e60ddb AM |
354 | void |
355 | clear_stub_table() | |
356 | { | |
357 | this->stub_table_index_.clear(); | |
358 | } | |
359 | ||
b4f7960d AM |
360 | int |
361 | abiversion() const | |
362 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
363 | ||
364 | // Set ABI version for input and output | |
365 | void | |
366 | set_abiversion(int ver); | |
367 | ||
368 | unsigned int | |
369 | ppc64_local_entry_offset(const Symbol* sym) const | |
370 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
371 | ||
372 | unsigned int | |
373 | ppc64_local_entry_offset(unsigned int symndx) const | |
374 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
375 | ||
cf43a2fe | 376 | private: |
bfdfa4cd AM |
377 | struct Opd_ent |
378 | { | |
379 | unsigned int shndx; | |
c6de8ed4 AM |
380 | bool discard : 1; |
381 | bool gc_mark : 1; | |
26a4e9cb | 382 | Address off; |
bfdfa4cd AM |
383 | }; |
384 | ||
385 | // Return index into opd_ent_ array for .opd entry at OFF. | |
386 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
387 | // apart when the language doesn't use the last 8-byte word, the | |
388 | // environment pointer. Thus dividing the entry section offset by | |
389 | // 16 will give an index into opd_ent_ that works for either layout | |
390 | // of .opd. (It leaves some elements of the vector unused when .opd | |
391 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
392 | // until relocations are processed, and in any case it is possible | |
393 | // for an object to have some entries spaced 16 bytes apart and | |
394 | // others 24 bytes apart.) | |
c9269dff AM |
395 | size_t |
396 | opd_ent_ndx(size_t off) const | |
397 | { return off >> 4;} | |
398 | ||
399 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. | |
400 | unsigned int special_; | |
bfdfa4cd | 401 | |
5edad15d AM |
402 | // For 64-bit the .rela.toc and .toc section shdnx. |
403 | unsigned int relatoc_; | |
404 | unsigned int toc_; | |
405 | ||
406 | // For 64-bit, an array with one entry per 64-bit word in the .toc | |
407 | // section, set if accesses using that word cannot be optimised. | |
408 | std::vector<bool> no_toc_opt_; | |
409 | ||
d8f5a274 AM |
410 | // For 64-bit, whether this object uses small model relocs to access |
411 | // the toc. | |
412 | bool has_small_toc_reloc_; | |
413 | ||
bfdfa4cd AM |
414 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
415 | // vector is valid. The flag could be made atomic and set in | |
416 | // do_read_relocs with memory_order_release and then tested with | |
417 | // memory_order_acquire, potentially resulting in fewer entries in | |
418 | // access_from_map_. | |
419 | bool opd_valid_; | |
420 | ||
c9269dff AM |
421 | // The first 8-byte word of an OPD entry gives the address of the |
422 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 423 | // relocation on this word. The following vector records the |
c9269dff | 424 | // section and offset specified by these relocations. |
bfdfa4cd AM |
425 | std::vector<Opd_ent> opd_ent_; |
426 | ||
e81fea4d | 427 | // References made to this object's .opd section when running |
bfdfa4cd AM |
428 | // gc_process_relocs for another object, before the opd_ent_ vector |
429 | // is valid for this object. | |
e81fea4d | 430 | Access_from access_from_map_; |
ec661b9d AM |
431 | |
432 | // Whether input section has a 14-bit branch reloc. | |
433 | std::vector<bool> has14_; | |
434 | ||
435 | // The stub table to use for a given input section. | |
a3e60ddb | 436 | std::vector<unsigned int> stub_table_index_; |
b4f7960d AM |
437 | |
438 | // Header e_flags | |
439 | elfcpp::Elf_Word e_flags_; | |
440 | ||
441 | // ELF st_other field for local symbols. | |
442 | std::vector<unsigned char> st_other_; | |
cf43a2fe AM |
443 | }; |
444 | ||
dc3714f3 AM |
445 | template<int size, bool big_endian> |
446 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
447 | { | |
448 | public: | |
449 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
450 | ||
451 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
452 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
453 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
b4f7960d AM |
454 | opd_shndx_(0), opd_ent_(), e_flags_(ehdr.get_e_flags()) |
455 | { | |
456 | this->set_abiversion(0); | |
457 | } | |
dc3714f3 AM |
458 | |
459 | ~Powerpc_dynobj() | |
460 | { } | |
461 | ||
462 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
463 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
464 | void | |
465 | do_read_symbols(Read_symbols_data*); | |
466 | ||
467 | // The .opd section shndx. | |
468 | unsigned int | |
469 | opd_shndx() const | |
470 | { | |
471 | return this->opd_shndx_; | |
472 | } | |
473 | ||
474 | // The .opd section address. | |
475 | Address | |
476 | opd_address() const | |
477 | { | |
478 | return this->opd_address_; | |
479 | } | |
480 | ||
481 | // Init OPD entry arrays. | |
482 | void | |
483 | init_opd(size_t opd_size) | |
484 | { | |
485 | size_t count = this->opd_ent_ndx(opd_size); | |
486 | this->opd_ent_.resize(count); | |
487 | } | |
488 | ||
489 | // Return section and offset of function entry for .opd + R_OFF. | |
490 | unsigned int | |
491 | get_opd_ent(Address r_off, Address* value = NULL) const | |
492 | { | |
493 | size_t ndx = this->opd_ent_ndx(r_off); | |
494 | gold_assert(ndx < this->opd_ent_.size()); | |
495 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
496 | if (value != NULL) | |
497 | *value = this->opd_ent_[ndx].off; | |
498 | return this->opd_ent_[ndx].shndx; | |
499 | } | |
500 | ||
501 | // Set section and offset of function entry for .opd + R_OFF. | |
502 | void | |
503 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
504 | { | |
505 | size_t ndx = this->opd_ent_ndx(r_off); | |
506 | gold_assert(ndx < this->opd_ent_.size()); | |
507 | this->opd_ent_[ndx].shndx = shndx; | |
508 | this->opd_ent_[ndx].off = value; | |
509 | } | |
510 | ||
b4f7960d AM |
511 | int |
512 | abiversion() const | |
513 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
514 | ||
515 | // Set ABI version for input and output. | |
516 | void | |
517 | set_abiversion(int ver); | |
518 | ||
dc3714f3 AM |
519 | private: |
520 | // Used to specify extent of executable sections. | |
521 | struct Sec_info | |
522 | { | |
523 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
524 | : start(start_), len(len_), shndx(shndx_) | |
525 | { } | |
526 | ||
527 | bool | |
528 | operator<(const Sec_info& that) const | |
529 | { return this->start < that.start; } | |
530 | ||
531 | Address start; | |
532 | Address len; | |
533 | unsigned int shndx; | |
534 | }; | |
535 | ||
536 | struct Opd_ent | |
537 | { | |
538 | unsigned int shndx; | |
539 | Address off; | |
540 | }; | |
541 | ||
542 | // Return index into opd_ent_ array for .opd entry at OFF. | |
543 | size_t | |
544 | opd_ent_ndx(size_t off) const | |
545 | { return off >> 4;} | |
546 | ||
547 | // For 64-bit the .opd section shndx and address. | |
548 | unsigned int opd_shndx_; | |
549 | Address opd_address_; | |
550 | ||
551 | // The first 8-byte word of an OPD entry gives the address of the | |
552 | // entry point of the function. Records the section and offset | |
553 | // corresponding to the address. Note that in dynamic objects, | |
554 | // offset is *not* relative to the section. | |
555 | std::vector<Opd_ent> opd_ent_; | |
b4f7960d AM |
556 | |
557 | // Header e_flags | |
558 | elfcpp::Elf_Word e_flags_; | |
dc3714f3 AM |
559 | }; |
560 | ||
5edad15d AM |
561 | // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the |
562 | // base class will emit. | |
563 | ||
564 | template<int sh_type, int size, bool big_endian> | |
565 | class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
566 | { | |
567 | public: | |
568 | Powerpc_copy_relocs() | |
569 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY) | |
570 | { } | |
571 | ||
572 | // Emit any saved relocations which turn out to be needed. This is | |
573 | // called after all the relocs have been scanned. | |
574 | void | |
575 | emit(Output_data_reloc<sh_type, true, size, big_endian>*); | |
576 | }; | |
577 | ||
42cacb20 DE |
578 | template<int size, bool big_endian> |
579 | class Target_powerpc : public Sized_target<size, big_endian> | |
580 | { | |
581 | public: | |
d83ce4e3 AM |
582 | typedef |
583 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 584 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 585 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
c9269dff | 586 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
587 | // Offset of tp and dtp pointers from start of TLS block. |
588 | static const Address tp_offset = 0x7000; | |
589 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
590 | |
591 | Target_powerpc() | |
592 | : Sized_target<size, big_endian>(&powerpc_info), | |
ec661b9d | 593 | got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL), |
5edad15d | 594 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
43819297 | 595 | tlsld_got_offset_(-1U), |
9e69ed50 | 596 | stub_tables_(), branch_lookup_table_(), branch_info_(), |
a3e60ddb | 597 | plt_thread_safe_(false), relax_failed_(false), relax_fail_count_(0), |
d49044c7 | 598 | stub_group_size_(0), savres_section_(0) |
42cacb20 DE |
599 | { |
600 | } | |
601 | ||
2e702c99 | 602 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
603 | // garbage collection. |
604 | void | |
ad0f2072 | 605 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
606 | Layout* layout, |
607 | Sized_relobj_file<size, big_endian>* object, | |
608 | unsigned int data_shndx, | |
609 | unsigned int sh_type, | |
610 | const unsigned char* prelocs, | |
611 | size_t reloc_count, | |
612 | Output_section* output_section, | |
613 | bool needs_special_offset_handling, | |
614 | size_t local_symbol_count, | |
615 | const unsigned char* plocal_symbols); | |
6d03d481 | 616 | |
42cacb20 DE |
617 | // Scan the relocations to look for symbol adjustments. |
618 | void | |
ad0f2072 | 619 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 620 | Layout* layout, |
6fa2a40b | 621 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
622 | unsigned int data_shndx, |
623 | unsigned int sh_type, | |
624 | const unsigned char* prelocs, | |
625 | size_t reloc_count, | |
626 | Output_section* output_section, | |
627 | bool needs_special_offset_handling, | |
628 | size_t local_symbol_count, | |
629 | const unsigned char* plocal_symbols); | |
921b5322 AM |
630 | |
631 | // Map input .toc section to output .got section. | |
632 | const char* | |
633 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
634 | { | |
635 | if (size == 64 && strcmp(name, ".toc") == 0) | |
636 | { | |
637 | *plen = 4; | |
638 | return ".got"; | |
639 | } | |
640 | return NULL; | |
641 | } | |
642 | ||
f3a0ed29 AM |
643 | // Provide linker defined save/restore functions. |
644 | void | |
645 | define_save_restore_funcs(Layout*, Symbol_table*); | |
646 | ||
ec661b9d AM |
647 | // No stubs unless a final link. |
648 | bool | |
649 | do_may_relax() const | |
650 | { return !parameters->options().relocatable(); } | |
651 | ||
652 | bool | |
653 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
654 | ||
9d5781f8 AM |
655 | void |
656 | do_plt_fde_location(const Output_data*, unsigned char*, | |
657 | uint64_t*, off_t*) const; | |
658 | ||
ec661b9d AM |
659 | // Stash info about branches, for stub generation. |
660 | void | |
661 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
662 | unsigned int data_shndx, Address r_offset, | |
663 | unsigned int r_type, unsigned int r_sym, Address addend) | |
664 | { | |
665 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
666 | this->branch_info_.push_back(info); | |
667 | if (r_type == elfcpp::R_POWERPC_REL14 | |
668 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
669 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
670 | ppc_object->set_has_14bit_branch(data_shndx); | |
671 | } | |
672 | ||
f43ba157 AM |
673 | void |
674 | do_define_standard_symbols(Symbol_table*, Layout*); | |
675 | ||
42cacb20 DE |
676 | // Finalize the sections. |
677 | void | |
f59f41f3 | 678 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
679 | |
680 | // Return the value to use for a dynamic which requires special | |
681 | // treatment. | |
682 | uint64_t | |
683 | do_dynsym_value(const Symbol*) const; | |
684 | ||
c9824451 AM |
685 | // Return the PLT address to use for a local symbol. |
686 | uint64_t | |
687 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
688 | ||
689 | // Return the PLT address to use for a global symbol. | |
690 | uint64_t | |
691 | do_plt_address_for_global(const Symbol*) const; | |
692 | ||
bd73a62d AM |
693 | // Return the offset to use for the GOT_INDX'th got entry which is |
694 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
695 | int64_t | |
696 | do_tls_offset_for_local(const Relobj* object, | |
697 | unsigned int symndx, | |
698 | unsigned int got_indx) const; | |
699 | ||
700 | // Return the offset to use for the GOT_INDX'th got entry which is | |
701 | // for global tls symbol GSYM. | |
702 | int64_t | |
703 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
704 | ||
dc3714f3 AM |
705 | void |
706 | do_function_location(Symbol_location*) const; | |
707 | ||
4d9aa155 AM |
708 | bool |
709 | do_can_check_for_function_pointers() const | |
710 | { return true; } | |
711 | ||
bbec1a5d AM |
712 | // Adjust -fsplit-stack code which calls non-split-stack code. |
713 | void | |
714 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
715 | section_offset_type fnoffset, section_size_type fnsize, | |
6e0813d3 | 716 | const unsigned char* prelocs, size_t reloc_count, |
bbec1a5d AM |
717 | unsigned char* view, section_size_type view_size, |
718 | std::string* from, std::string* to) const; | |
719 | ||
42cacb20 DE |
720 | // Relocate a section. |
721 | void | |
722 | relocate_section(const Relocate_info<size, big_endian>*, | |
723 | unsigned int sh_type, | |
724 | const unsigned char* prelocs, | |
725 | size_t reloc_count, | |
726 | Output_section* output_section, | |
727 | bool needs_special_offset_handling, | |
728 | unsigned char* view, | |
c9269dff | 729 | Address view_address, |
364c7fa5 ILT |
730 | section_size_type view_size, |
731 | const Reloc_symbol_changes*); | |
42cacb20 DE |
732 | |
733 | // Scan the relocs during a relocatable link. | |
734 | void | |
ad0f2072 | 735 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 736 | Layout* layout, |
6fa2a40b | 737 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
738 | unsigned int data_shndx, |
739 | unsigned int sh_type, | |
740 | const unsigned char* prelocs, | |
741 | size_t reloc_count, | |
742 | Output_section* output_section, | |
743 | bool needs_special_offset_handling, | |
744 | size_t local_symbol_count, | |
745 | const unsigned char* plocal_symbols, | |
746 | Relocatable_relocs*); | |
747 | ||
4d625b70 CC |
748 | // Scan the relocs for --emit-relocs. |
749 | void | |
750 | emit_relocs_scan(Symbol_table* symtab, | |
751 | Layout* layout, | |
752 | Sized_relobj_file<size, big_endian>* object, | |
753 | unsigned int data_shndx, | |
754 | unsigned int sh_type, | |
755 | const unsigned char* prelocs, | |
756 | size_t reloc_count, | |
757 | Output_section* output_section, | |
758 | bool needs_special_offset_handling, | |
759 | size_t local_symbol_count, | |
760 | const unsigned char* plocal_syms, | |
761 | Relocatable_relocs* rr); | |
762 | ||
7404fe1b | 763 | // Emit relocations for a section. |
42cacb20 | 764 | void |
7404fe1b AM |
765 | relocate_relocs(const Relocate_info<size, big_endian>*, |
766 | unsigned int sh_type, | |
767 | const unsigned char* prelocs, | |
768 | size_t reloc_count, | |
769 | Output_section* output_section, | |
62fe925a RM |
770 | typename elfcpp::Elf_types<size>::Elf_Off |
771 | offset_in_output_section, | |
7404fe1b AM |
772 | unsigned char*, |
773 | Address view_address, | |
774 | section_size_type, | |
775 | unsigned char* reloc_view, | |
776 | section_size_type reloc_view_size); | |
42cacb20 DE |
777 | |
778 | // Return whether SYM is defined by the ABI. | |
779 | bool | |
9c2d0ef9 | 780 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 781 | { |
cf43a2fe | 782 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
783 | } |
784 | ||
785 | // Return the size of the GOT section. | |
786 | section_size_type | |
0e70b911 | 787 | got_size() const |
42cacb20 DE |
788 | { |
789 | gold_assert(this->got_ != NULL); | |
790 | return this->got_->data_size(); | |
791 | } | |
792 | ||
cf43a2fe AM |
793 | // Get the PLT section. |
794 | const Output_data_plt_powerpc<size, big_endian>* | |
795 | plt_section() const | |
796 | { | |
797 | gold_assert(this->plt_ != NULL); | |
798 | return this->plt_; | |
799 | } | |
800 | ||
e5d5f5ed AM |
801 | // Get the IPLT section. |
802 | const Output_data_plt_powerpc<size, big_endian>* | |
803 | iplt_section() const | |
804 | { | |
805 | gold_assert(this->iplt_ != NULL); | |
806 | return this->iplt_; | |
807 | } | |
808 | ||
cf43a2fe AM |
809 | // Get the .glink section. |
810 | const Output_data_glink<size, big_endian>* | |
811 | glink_section() const | |
812 | { | |
813 | gold_assert(this->glink_ != NULL); | |
814 | return this->glink_; | |
815 | } | |
816 | ||
9055360d AM |
817 | Output_data_glink<size, big_endian>* |
818 | glink_section() | |
819 | { | |
820 | gold_assert(this->glink_ != NULL); | |
821 | return this->glink_; | |
822 | } | |
823 | ||
9d5781f8 AM |
824 | bool has_glink() const |
825 | { return this->glink_ != NULL; } | |
826 | ||
cf43a2fe AM |
827 | // Get the GOT section. |
828 | const Output_data_got_powerpc<size, big_endian>* | |
829 | got_section() const | |
830 | { | |
831 | gold_assert(this->got_ != NULL); | |
832 | return this->got_; | |
833 | } | |
834 | ||
26a4e9cb AM |
835 | // Get the GOT section, creating it if necessary. |
836 | Output_data_got_powerpc<size, big_endian>* | |
837 | got_section(Symbol_table*, Layout*); | |
838 | ||
cf43a2fe AM |
839 | Object* |
840 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
841 | const elfcpp::Ehdr<size, big_endian>&); | |
842 | ||
0e70b911 CC |
843 | // Return the number of entries in the GOT. |
844 | unsigned int | |
845 | got_entry_count() const | |
846 | { | |
847 | if (this->got_ == NULL) | |
848 | return 0; | |
849 | return this->got_size() / (size / 8); | |
850 | } | |
851 | ||
852 | // Return the number of entries in the PLT. | |
853 | unsigned int | |
854 | plt_entry_count() const; | |
855 | ||
856 | // Return the offset of the first non-reserved PLT entry. | |
857 | unsigned int | |
b4f7960d AM |
858 | first_plt_entry_offset() const |
859 | { | |
860 | if (size == 32) | |
861 | return 0; | |
862 | if (this->abiversion() >= 2) | |
863 | return 16; | |
864 | return 24; | |
865 | } | |
0e70b911 CC |
866 | |
867 | // Return the size of each PLT entry. | |
868 | unsigned int | |
b4f7960d AM |
869 | plt_entry_size() const |
870 | { | |
871 | if (size == 32) | |
872 | return 4; | |
873 | if (this->abiversion() >= 2) | |
874 | return 8; | |
875 | return 24; | |
876 | } | |
0e70b911 | 877 | |
d49044c7 AM |
878 | Output_data_save_res<size, big_endian>* |
879 | savres_section() const | |
880 | { | |
881 | return this->savres_section_; | |
882 | } | |
883 | ||
e81fea4d AM |
884 | // Add any special sections for this symbol to the gc work list. |
885 | // For powerpc64, this adds the code section of a function | |
886 | // descriptor. | |
887 | void | |
888 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
889 | ||
890 | // Handle target specific gc actions when adding a gc reference from | |
891 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
892 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
893 | // section of a function descriptor. | |
894 | void | |
895 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 896 | Relobj* src_obj, |
e81fea4d | 897 | unsigned int src_shndx, |
efc6fa12 | 898 | Relobj* dst_obj, |
e81fea4d AM |
899 | unsigned int dst_shndx, |
900 | Address dst_off) const; | |
901 | ||
ec661b9d AM |
902 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
903 | const Stub_tables& | |
904 | stub_tables() const | |
905 | { return this->stub_tables_; } | |
906 | ||
907 | const Output_data_brlt_powerpc<size, big_endian>* | |
908 | brlt_section() const | |
909 | { return this->brlt_section_; } | |
910 | ||
911 | void | |
912 | add_branch_lookup_table(Address to) | |
913 | { | |
914 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
915 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
916 | } | |
917 | ||
918 | Address | |
919 | find_branch_lookup_table(Address to) | |
920 | { | |
921 | typename Branch_lookup_table::const_iterator p | |
922 | = this->branch_lookup_table_.find(to); | |
923 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
924 | } | |
925 | ||
926 | void | |
927 | write_branch_lookup_table(unsigned char *oview) | |
928 | { | |
929 | for (typename Branch_lookup_table::const_iterator p | |
930 | = this->branch_lookup_table_.begin(); | |
931 | p != this->branch_lookup_table_.end(); | |
932 | ++p) | |
933 | { | |
4d5effb9 | 934 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
935 | } |
936 | } | |
937 | ||
9e69ed50 AM |
938 | bool |
939 | plt_thread_safe() const | |
940 | { return this->plt_thread_safe_; } | |
941 | ||
b4f7960d AM |
942 | int |
943 | abiversion () const | |
944 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } | |
945 | ||
946 | void | |
947 | set_abiversion (int ver) | |
948 | { | |
949 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
950 | flags &= ~elfcpp::EF_PPC64_ABI; | |
951 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
952 | this->set_processor_specific_flags(flags); | |
953 | } | |
954 | ||
955 | // Offset to to save stack slot | |
956 | int | |
957 | stk_toc () const | |
958 | { return this->abiversion() < 2 ? 40 : 24; } | |
959 | ||
42cacb20 DE |
960 | private: |
961 | ||
e3deeb9c AM |
962 | class Track_tls |
963 | { | |
964 | public: | |
965 | enum Tls_get_addr | |
966 | { | |
967 | NOT_EXPECTED = 0, | |
968 | EXPECTED = 1, | |
969 | SKIP = 2, | |
970 | NORMAL = 3 | |
971 | }; | |
972 | ||
973 | Track_tls() | |
974 | : tls_get_addr_(NOT_EXPECTED), | |
975 | relinfo_(NULL), relnum_(0), r_offset_(0) | |
976 | { } | |
977 | ||
978 | ~Track_tls() | |
979 | { | |
980 | if (this->tls_get_addr_ != NOT_EXPECTED) | |
981 | this->missing(); | |
982 | } | |
983 | ||
984 | void | |
985 | missing(void) | |
986 | { | |
987 | if (this->relinfo_ != NULL) | |
988 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
989 | _("missing expected __tls_get_addr call")); | |
990 | } | |
991 | ||
992 | void | |
993 | expect_tls_get_addr_call( | |
994 | const Relocate_info<size, big_endian>* relinfo, | |
995 | size_t relnum, | |
996 | Address r_offset) | |
997 | { | |
998 | this->tls_get_addr_ = EXPECTED; | |
999 | this->relinfo_ = relinfo; | |
1000 | this->relnum_ = relnum; | |
1001 | this->r_offset_ = r_offset; | |
1002 | } | |
1003 | ||
1004 | void | |
1005 | expect_tls_get_addr_call() | |
1006 | { this->tls_get_addr_ = EXPECTED; } | |
1007 | ||
1008 | void | |
1009 | skip_next_tls_get_addr_call() | |
1010 | {this->tls_get_addr_ = SKIP; } | |
1011 | ||
1012 | Tls_get_addr | |
1013 | maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym) | |
1014 | { | |
1015 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
1016 | || r_type == elfcpp::R_PPC_PLTREL24) | |
1017 | && gsym != NULL | |
1018 | && strcmp(gsym->name(), "__tls_get_addr") == 0); | |
1019 | Tls_get_addr last_tls = this->tls_get_addr_; | |
1020 | this->tls_get_addr_ = NOT_EXPECTED; | |
1021 | if (is_tls_call && last_tls != EXPECTED) | |
1022 | return last_tls; | |
1023 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1024 | { | |
1025 | this->missing(); | |
1026 | return EXPECTED; | |
1027 | } | |
1028 | return NORMAL; | |
1029 | } | |
1030 | ||
1031 | private: | |
1032 | // What we're up to regarding calls to __tls_get_addr. | |
1033 | // On powerpc, the branch and link insn making a call to | |
1034 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1035 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1036 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1037 | // The marker relocation always comes first, and has the same | |
1038 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1039 | // argument. This ties the arg setup insn with the call insn, | |
1040 | // allowing ld to safely optimize away the call. We check that | |
1041 | // every call to __tls_get_addr has a marker relocation, and that | |
1042 | // every marker relocation is on a call to __tls_get_addr. | |
1043 | Tls_get_addr tls_get_addr_; | |
1044 | // Info about the last reloc for error message. | |
1045 | const Relocate_info<size, big_endian>* relinfo_; | |
1046 | size_t relnum_; | |
1047 | Address r_offset_; | |
1048 | }; | |
1049 | ||
42cacb20 | 1050 | // The class which scans relocations. |
e3deeb9c | 1051 | class Scan : protected Track_tls |
42cacb20 DE |
1052 | { |
1053 | public: | |
bfdfa4cd AM |
1054 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1055 | ||
42cacb20 | 1056 | Scan() |
e3deeb9c | 1057 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1058 | { } |
1059 | ||
95a2c8d6 | 1060 | static inline int |
88b8e639 | 1061 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1062 | |
42cacb20 | 1063 | inline void |
ad0f2072 | 1064 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1065 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1066 | unsigned int data_shndx, |
1067 | Output_section* output_section, | |
1068 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1069 | const elfcpp::Sym<size, big_endian>& lsym, |
1070 | bool is_discarded); | |
42cacb20 DE |
1071 | |
1072 | inline void | |
ad0f2072 | 1073 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1074 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1075 | unsigned int data_shndx, |
1076 | Output_section* output_section, | |
1077 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1078 | Symbol* gsym); | |
1079 | ||
21bb3914 ST |
1080 | inline bool |
1081 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1082 | Target_powerpc* , | |
f6971787 | 1083 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1084 | unsigned int , |
2e702c99 RM |
1085 | Output_section* , |
1086 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1087 | unsigned int r_type, |
2e702c99 | 1088 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1089 | { |
1090 | // PowerPC64 .opd is not folded, so any identical function text | |
1091 | // may be folded and we'll still keep function addresses distinct. | |
1092 | // That means no reloc is of concern here. | |
1093 | if (size == 64) | |
f6971787 AM |
1094 | { |
1095 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1096 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1097 | if (ppcobj->abiversion() == 1) | |
1098 | return false; | |
1099 | } | |
1100 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1101 | // function code might be taking the address of the function. |
1102 | return !is_branch_reloc(r_type); | |
1103 | } | |
21bb3914 ST |
1104 | |
1105 | inline bool | |
1106 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1107 | Target_powerpc* , | |
f6971787 | 1108 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1109 | unsigned int , |
1110 | Output_section* , | |
4d9aa155 AM |
1111 | const elfcpp::Rela<size, big_endian>& , |
1112 | unsigned int r_type, | |
1113 | Symbol*) | |
1114 | { | |
1115 | // As above. | |
1116 | if (size == 64) | |
f6971787 AM |
1117 | { |
1118 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1119 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1120 | if (ppcobj->abiversion() == 1) | |
1121 | return false; | |
1122 | } | |
4d9aa155 AM |
1123 | return !is_branch_reloc(r_type); |
1124 | } | |
21bb3914 | 1125 | |
b3ccdeb5 | 1126 | static bool |
9055360d AM |
1127 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1128 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1129 | unsigned int r_type, bool report_err); |
1130 | ||
42cacb20 DE |
1131 | private: |
1132 | static void | |
6fa2a40b | 1133 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1134 | unsigned int r_type); |
1135 | ||
1136 | static void | |
6fa2a40b | 1137 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1138 | unsigned int r_type, Symbol*); |
1139 | ||
1140 | static void | |
1141 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1142 | Target_powerpc* target); | |
1143 | ||
1144 | void | |
1145 | check_non_pic(Relobj*, unsigned int r_type); | |
1146 | ||
1147 | // Whether we have issued an error about a non-PIC compilation. | |
1148 | bool issued_non_pic_error_; | |
1149 | }; | |
1150 | ||
1611bc4a AM |
1151 | bool |
1152 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1153 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1154 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1155 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1156 | |
42cacb20 | 1157 | // The class which implements relocation. |
e3deeb9c | 1158 | class Relocate : protected Track_tls |
42cacb20 DE |
1159 | { |
1160 | public: | |
dd93cd0a AM |
1161 | // Use 'at' branch hints when true, 'y' when false. |
1162 | // FIXME maybe: set this with an option. | |
1163 | static const bool is_isa_v2 = true; | |
1164 | ||
dd93cd0a | 1165 | Relocate() |
e3deeb9c | 1166 | : Track_tls() |
dd93cd0a AM |
1167 | { } |
1168 | ||
42cacb20 DE |
1169 | // Do a relocation. Return false if the caller should not issue |
1170 | // any warnings about this relocation. | |
1171 | inline bool | |
91a65d2f AM |
1172 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1173 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1174 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1175 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1176 | section_size_type); |
42cacb20 DE |
1177 | }; |
1178 | ||
168a4726 AM |
1179 | class Relocate_comdat_behavior |
1180 | { | |
1181 | public: | |
1182 | // Decide what the linker should do for relocations that refer to | |
1183 | // discarded comdat sections. | |
1184 | inline Comdat_behavior | |
1185 | get(const char* name) | |
1186 | { | |
1187 | gold::Default_comdat_behavior default_behavior; | |
1188 | Comdat_behavior ret = default_behavior.get(name); | |
1189 | if (ret == CB_WARNING) | |
1190 | { | |
1191 | if (size == 32 | |
1192 | && (strcmp(name, ".fixup") == 0 | |
1193 | || strcmp(name, ".got2") == 0)) | |
1194 | ret = CB_IGNORE; | |
1195 | if (size == 64 | |
1196 | && (strcmp(name, ".opd") == 0 | |
1197 | || strcmp(name, ".toc") == 0 | |
1198 | || strcmp(name, ".toc1") == 0)) | |
1199 | ret = CB_IGNORE; | |
1200 | } | |
1201 | return ret; | |
1202 | } | |
1203 | }; | |
1204 | ||
dd93cd0a AM |
1205 | // Optimize the TLS relocation type based on what we know about the |
1206 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1207 | // known at link time. | |
1208 | ||
1209 | tls::Tls_optimization | |
1210 | optimize_tls_gd(bool is_final) | |
1211 | { | |
1212 | // If we are generating a shared library, then we can't do anything | |
1213 | // in the linker. | |
1214 | if (parameters->options().shared()) | |
1215 | return tls::TLSOPT_NONE; | |
1216 | ||
1217 | if (!is_final) | |
1218 | return tls::TLSOPT_TO_IE; | |
1219 | return tls::TLSOPT_TO_LE; | |
1220 | } | |
1221 | ||
1222 | tls::Tls_optimization | |
1223 | optimize_tls_ld() | |
1224 | { | |
1225 | if (parameters->options().shared()) | |
1226 | return tls::TLSOPT_NONE; | |
1227 | ||
1228 | return tls::TLSOPT_TO_LE; | |
1229 | } | |
1230 | ||
1231 | tls::Tls_optimization | |
1232 | optimize_tls_ie(bool is_final) | |
1233 | { | |
1234 | if (!is_final || parameters->options().shared()) | |
1235 | return tls::TLSOPT_NONE; | |
1236 | ||
1237 | return tls::TLSOPT_TO_LE; | |
1238 | } | |
cf43a2fe | 1239 | |
cf43a2fe AM |
1240 | // Create glink. |
1241 | void | |
1242 | make_glink_section(Layout*); | |
42cacb20 | 1243 | |
cf43a2fe AM |
1244 | // Create the PLT section. |
1245 | void | |
40b469d7 | 1246 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1247 | |
e5d5f5ed | 1248 | void |
40b469d7 | 1249 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1250 | |
ec661b9d AM |
1251 | void |
1252 | make_brlt_section(Layout*); | |
1253 | ||
42cacb20 DE |
1254 | // Create a PLT entry for a global symbol. |
1255 | void | |
ec661b9d | 1256 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1257 | |
1258 | // Create a PLT entry for a local IFUNC symbol. | |
1259 | void | |
40b469d7 | 1260 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1261 | Sized_relobj_file<size, big_endian>*, |
1262 | unsigned int); | |
1263 | ||
42cacb20 | 1264 | |
dd93cd0a AM |
1265 | // Create a GOT entry for local dynamic __tls_get_addr. |
1266 | unsigned int | |
1267 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1268 | Sized_relobj_file<size, big_endian>* object); | |
1269 | ||
42cacb20 | 1270 | unsigned int |
dd93cd0a AM |
1271 | tlsld_got_offset() const |
1272 | { | |
1273 | return this->tlsld_got_offset_; | |
1274 | } | |
42cacb20 | 1275 | |
42cacb20 DE |
1276 | // Get the dynamic reloc section, creating it if necessary. |
1277 | Reloc_section* | |
1278 | rela_dyn_section(Layout*); | |
1279 | ||
b3ccdeb5 AM |
1280 | // Similarly, but for ifunc symbols get the one for ifunc. |
1281 | Reloc_section* | |
1282 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1283 | ||
42cacb20 DE |
1284 | // Copy a relocation against a global symbol. |
1285 | void | |
ef9beddf | 1286 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1287 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1288 | unsigned int shndx, Output_section* output_section, |
1289 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1290 | { | |
859d7987 | 1291 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1292 | this->copy_relocs_.copy_reloc(symtab, layout, |
1293 | symtab->get_sized_symbol<size>(sym), | |
1294 | object, shndx, output_section, | |
859d7987 CC |
1295 | r_type, reloc.get_r_offset(), |
1296 | reloc.get_r_addend(), | |
1297 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1298 | } |
1299 | ||
0cfdc767 | 1300 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1301 | void |
a3e60ddb | 1302 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1303 | |
1304 | // Sort output sections by address. | |
1305 | struct Sort_sections | |
1306 | { | |
1307 | bool | |
1308 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1309 | { return sec1->address() < sec2->address(); } | |
1310 | }; | |
1311 | ||
1312 | class Branch_info | |
1313 | { | |
1314 | public: | |
1315 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1316 | unsigned int data_shndx, | |
1317 | Address r_offset, | |
1318 | unsigned int r_type, | |
1319 | unsigned int r_sym, | |
1320 | Address addend) | |
1321 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
1322 | r_type_(r_type), r_sym_(r_sym), addend_(addend) | |
1323 | { } | |
1324 | ||
1325 | ~Branch_info() | |
1326 | { } | |
1327 | ||
1328 | // If this branch needs a plt call stub, or a long branch stub, make one. | |
a3e60ddb | 1329 | bool |
ec661b9d AM |
1330 | make_stub(Stub_table<size, big_endian>*, |
1331 | Stub_table<size, big_endian>*, | |
1332 | Symbol_table*) const; | |
1333 | ||
1334 | private: | |
1335 | // The branch location.. | |
1336 | Powerpc_relobj<size, big_endian>* object_; | |
1337 | unsigned int shndx_; | |
1338 | Address offset_; | |
1339 | // ..and the branch type and destination. | |
1340 | unsigned int r_type_; | |
1341 | unsigned int r_sym_; | |
1342 | Address addend_; | |
1343 | }; | |
1344 | ||
42cacb20 DE |
1345 | // Information about this specific target which we pass to the |
1346 | // general Target structure. | |
1347 | static Target::Target_info powerpc_info; | |
1348 | ||
1349 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1350 | // These values are exposed to the ABI in an incremental link. |
1351 | // Do not renumber existing values without changing the version | |
1352 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1353 | enum Got_type |
1354 | { | |
dd93cd0a AM |
1355 | GOT_TYPE_STANDARD, |
1356 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1357 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1358 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1359 | }; |
1360 | ||
ec661b9d | 1361 | // The GOT section. |
cf43a2fe | 1362 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1363 | // The PLT section. This is a container for a table of addresses, |
1364 | // and their relocations. Each address in the PLT has a dynamic | |
1365 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1366 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1367 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1368 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1369 | // linker adds a stub that loads the PLT entry into ctr then | |
1370 | // branches to ctr. There may be more than one stub for each PLT | |
1371 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1372 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1373 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1374 | // The IPLT section. Like plt_, this is a container for a table of |
1375 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1376 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1377 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1378 | // entry in .glink for lazy resolution, and the relocation section | |
1379 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1380 | // the relocation section may contain relocations against | |
1381 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1382 | // relocation section will appear at the end of other dynamic | |
1383 | // relocations, so that ld.so applies these relocations after other | |
1384 | // dynamic relocations. In a static executable, the relocation | |
1385 | // section is emitted and marked with __rela_iplt_start and | |
1386 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1387 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
ec661b9d AM |
1388 | // Section holding long branch destinations. |
1389 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1390 | // The .glink section. | |
cf43a2fe | 1391 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1392 | // The dynamic reloc section. |
42cacb20 DE |
1393 | Reloc_section* rela_dyn_; |
1394 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1395 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1396 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1397 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1398 | |
1399 | Stub_tables stub_tables_; | |
1400 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1401 | Branch_lookup_table branch_lookup_table_; | |
1402 | ||
1403 | typedef std::vector<Branch_info> Branches; | |
1404 | Branches branch_info_; | |
9e69ed50 AM |
1405 | |
1406 | bool plt_thread_safe_; | |
a3e60ddb AM |
1407 | |
1408 | bool relax_failed_; | |
1409 | int relax_fail_count_; | |
1410 | int32_t stub_group_size_; | |
d49044c7 AM |
1411 | |
1412 | Output_data_save_res<size, big_endian> *savres_section_; | |
42cacb20 DE |
1413 | }; |
1414 | ||
1415 | template<> | |
1416 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1417 | { | |
1418 | 32, // size | |
1419 | true, // is_big_endian | |
1420 | elfcpp::EM_PPC, // machine_code | |
1421 | false, // has_make_symbol | |
1422 | false, // has_resolve | |
1423 | false, // has_code_fill | |
1424 | true, // is_default_stack_executable | |
b3ce541e | 1425 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1426 | '\0', // wrap_char |
1427 | "/usr/lib/ld.so.1", // dynamic_linker | |
1428 | 0x10000000, // default_text_segment_address | |
1429 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1430 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1431 | false, // isolate_execinstr |
1432 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1433 | elfcpp::SHN_UNDEF, // small_common_shndx |
1434 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1435 | 0, // small_common_section_flags | |
05a352e6 DK |
1436 | 0, // large_common_section_flags |
1437 | NULL, // attributes_section | |
a67858e0 | 1438 | NULL, // attributes_vendor |
8d9743bd MK |
1439 | "_start", // entry_symbol_name |
1440 | 32, // hash_entry_size | |
42cacb20 DE |
1441 | }; |
1442 | ||
1443 | template<> | |
1444 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1445 | { | |
1446 | 32, // size | |
1447 | false, // is_big_endian | |
1448 | elfcpp::EM_PPC, // machine_code | |
1449 | false, // has_make_symbol | |
1450 | false, // has_resolve | |
1451 | false, // has_code_fill | |
1452 | true, // is_default_stack_executable | |
b3ce541e | 1453 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1454 | '\0', // wrap_char |
1455 | "/usr/lib/ld.so.1", // dynamic_linker | |
1456 | 0x10000000, // default_text_segment_address | |
1457 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1458 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1459 | false, // isolate_execinstr |
1460 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1461 | elfcpp::SHN_UNDEF, // small_common_shndx |
1462 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1463 | 0, // small_common_section_flags | |
05a352e6 DK |
1464 | 0, // large_common_section_flags |
1465 | NULL, // attributes_section | |
a67858e0 | 1466 | NULL, // attributes_vendor |
8d9743bd MK |
1467 | "_start", // entry_symbol_name |
1468 | 32, // hash_entry_size | |
42cacb20 DE |
1469 | }; |
1470 | ||
1471 | template<> | |
1472 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1473 | { | |
1474 | 64, // size | |
1475 | true, // is_big_endian | |
1476 | elfcpp::EM_PPC64, // machine_code | |
1477 | false, // has_make_symbol | |
1478 | false, // has_resolve | |
1479 | false, // has_code_fill | |
1480 | true, // is_default_stack_executable | |
b3ce541e | 1481 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1482 | '\0', // wrap_char |
1483 | "/usr/lib/ld.so.1", // dynamic_linker | |
1484 | 0x10000000, // default_text_segment_address | |
1485 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1486 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1487 | false, // isolate_execinstr |
1488 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1489 | elfcpp::SHN_UNDEF, // small_common_shndx |
1490 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1491 | 0, // small_common_section_flags | |
05a352e6 DK |
1492 | 0, // large_common_section_flags |
1493 | NULL, // attributes_section | |
a67858e0 | 1494 | NULL, // attributes_vendor |
8d9743bd MK |
1495 | "_start", // entry_symbol_name |
1496 | 32, // hash_entry_size | |
42cacb20 DE |
1497 | }; |
1498 | ||
1499 | template<> | |
1500 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1501 | { | |
1502 | 64, // size | |
1503 | false, // is_big_endian | |
1504 | elfcpp::EM_PPC64, // machine_code | |
1505 | false, // has_make_symbol | |
1506 | false, // has_resolve | |
1507 | false, // has_code_fill | |
1508 | true, // is_default_stack_executable | |
b3ce541e | 1509 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1510 | '\0', // wrap_char |
1511 | "/usr/lib/ld.so.1", // dynamic_linker | |
1512 | 0x10000000, // default_text_segment_address | |
1513 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1514 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1515 | false, // isolate_execinstr |
1516 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1517 | elfcpp::SHN_UNDEF, // small_common_shndx |
1518 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1519 | 0, // small_common_section_flags | |
05a352e6 DK |
1520 | 0, // large_common_section_flags |
1521 | NULL, // attributes_section | |
a67858e0 | 1522 | NULL, // attributes_vendor |
8d9743bd MK |
1523 | "_start", // entry_symbol_name |
1524 | 32, // hash_entry_size | |
42cacb20 DE |
1525 | }; |
1526 | ||
dd93cd0a AM |
1527 | inline bool |
1528 | is_branch_reloc(unsigned int r_type) | |
1529 | { | |
1530 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1531 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1532 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1533 | || r_type == elfcpp::R_POWERPC_REL14 | |
1534 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1535 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1536 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1537 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1538 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1539 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1540 | } | |
1541 | ||
1542 | // If INSN is an opcode that may be used with an @tls operand, return | |
1543 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1544 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1545 | uint32_t | |
1546 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1547 | { | |
1548 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1549 | return 0; | |
1550 | ||
1551 | unsigned int rtra; | |
1552 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1553 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1554 | else if (((insn >> 16) & 0x1f) == reg) | |
1555 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1556 | else | |
1557 | return 0; | |
1558 | ||
1559 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1560 | // add -> addi | |
1561 | insn = 14 << 26; | |
1562 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1563 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1564 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1565 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1566 | // load and store indexed -> dform | |
1567 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1568 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1569 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1570 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1571 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1572 | // lwax -> lwa | |
1573 | insn = (58 << 26) | 2; | |
1574 | else | |
1575 | return 0; | |
1576 | insn |= rtra; | |
1577 | return insn; | |
1578 | } | |
1579 | ||
dd93cd0a | 1580 | |
42cacb20 DE |
1581 | template<int size, bool big_endian> |
1582 | class Powerpc_relocate_functions | |
1583 | { | |
dd93cd0a | 1584 | public: |
f4baf0d4 | 1585 | enum Overflow_check |
dd93cd0a | 1586 | { |
f4baf0d4 AM |
1587 | CHECK_NONE, |
1588 | CHECK_SIGNED, | |
b80eed39 AM |
1589 | CHECK_UNSIGNED, |
1590 | CHECK_BITFIELD, | |
1591 | CHECK_LOW_INSN, | |
1592 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1593 | }; |
1594 | ||
f4baf0d4 | 1595 | enum Status |
dd93cd0a | 1596 | { |
f4baf0d4 AM |
1597 | STATUS_OK, |
1598 | STATUS_OVERFLOW | |
1599 | }; | |
dd93cd0a | 1600 | |
42cacb20 | 1601 | private: |
c9269dff | 1602 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1603 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1604 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1605 | |
dd93cd0a AM |
1606 | template<int valsize> |
1607 | static inline bool | |
1608 | has_overflow_signed(Address value) | |
1609 | { | |
1610 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1611 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1612 | limit <<= ((valsize - 1) >> 1); | |
1613 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1614 | return value + limit > (limit << 1) - 1; | |
1615 | } | |
1616 | ||
1617 | template<int valsize> | |
1618 | static inline bool | |
b80eed39 | 1619 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1620 | { |
1621 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1622 | limit <<= ((valsize - 1) >> 1); | |
1623 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1624 | return value > (limit << 1) - 1; |
1625 | } | |
1626 | ||
1627 | template<int valsize> | |
1628 | static inline bool | |
1629 | has_overflow_bitfield(Address value) | |
1630 | { | |
1631 | return (has_overflow_unsigned<valsize>(value) | |
1632 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1633 | } |
1634 | ||
1635 | template<int valsize> | |
f4baf0d4 AM |
1636 | static inline Status |
1637 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1638 | { |
f4baf0d4 | 1639 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1640 | { |
1641 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1642 | return STATUS_OVERFLOW; |
dd93cd0a | 1643 | } |
b80eed39 AM |
1644 | else if (overflow == CHECK_UNSIGNED) |
1645 | { | |
1646 | if (has_overflow_unsigned<valsize>(value)) | |
1647 | return STATUS_OVERFLOW; | |
1648 | } | |
f4baf0d4 | 1649 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1650 | { |
1651 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1652 | return STATUS_OVERFLOW; |
dd93cd0a | 1653 | } |
f4baf0d4 | 1654 | return STATUS_OK; |
dd93cd0a AM |
1655 | } |
1656 | ||
cf43a2fe | 1657 | // Do a simple RELA relocation |
0cfb0717 | 1658 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1659 | static inline Status |
1660 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1661 | { |
0cfb0717 | 1662 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1663 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1664 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1665 | return overflowed<valsize>(value, overflow); |
1666 | } | |
1667 | ||
0cfb0717 | 1668 | template<int fieldsize, int valsize> |
f4baf0d4 | 1669 | static inline Status |
42cacb20 DE |
1670 | rela(unsigned char* view, |
1671 | unsigned int right_shift, | |
0cfb0717 | 1672 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1673 | Address value, |
f4baf0d4 | 1674 | Overflow_check overflow) |
42cacb20 | 1675 | { |
0cfb0717 | 1676 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1677 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1678 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1679 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1680 | val &= ~dst_mask; |
1681 | reloc &= dst_mask; | |
0cfb0717 | 1682 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1683 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1684 | } |
1685 | ||
cf43a2fe | 1686 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1687 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1688 | static inline Status |
1689 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1690 | { |
0cfb0717 | 1691 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1692 | return overflowed<valsize>(value, overflow); |
1693 | } | |
1694 | ||
0cfb0717 | 1695 | template<int fieldsize, int valsize> |
f4baf0d4 | 1696 | static inline Status |
cf43a2fe AM |
1697 | rela_ua(unsigned char* view, |
1698 | unsigned int right_shift, | |
0cfb0717 | 1699 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1700 | Address value, |
f4baf0d4 | 1701 | Overflow_check overflow) |
42cacb20 | 1702 | { |
0cfb0717 | 1703 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1704 | Valtype; |
0cfb0717 | 1705 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1706 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1707 | val &= ~dst_mask; |
1708 | reloc &= dst_mask; | |
0cfb0717 | 1709 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1710 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1711 | } |
1712 | ||
42cacb20 | 1713 | public: |
dd93cd0a | 1714 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 1715 | static inline void |
dd93cd0a | 1716 | addr64(unsigned char* view, Address value) |
0cfb0717 | 1717 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 1718 | |
dd93cd0a | 1719 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 1720 | static inline void |
dd93cd0a | 1721 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 1722 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
1723 | |
1724 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
1725 | static inline Status |
1726 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1727 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
1728 | |
1729 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
1730 | static inline Status |
1731 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1732 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
1733 | |
1734 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
1735 | static inline Status |
1736 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1737 | { |
0cfb0717 AM |
1738 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
1739 | value, overflow); | |
f4baf0d4 AM |
1740 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1741 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1742 | return stat; |
1743 | } | |
42cacb20 DE |
1744 | |
1745 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
1746 | static inline Status |
1747 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1748 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 1749 | |
dd93cd0a | 1750 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
1751 | static inline Status |
1752 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 1753 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 1754 | |
dd93cd0a | 1755 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
1756 | static inline Status |
1757 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1758 | { |
0cfb0717 | 1759 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 1760 | if ((value & 3) != 0) |
f4baf0d4 | 1761 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
1762 | return stat; |
1763 | } | |
42cacb20 | 1764 | |
a680de9a PB |
1765 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
1766 | static inline Status | |
1767 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
1768 | { | |
1769 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
1770 | if ((value & 15) != 0) | |
1771 | stat = STATUS_OVERFLOW; | |
1772 | return stat; | |
1773 | } | |
1774 | ||
42cacb20 DE |
1775 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
1776 | static inline void | |
dd93cd0a | 1777 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 1778 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1779 | |
c9269dff | 1780 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 1781 | static inline void |
dd93cd0a AM |
1782 | addr16_ha(unsigned char* view, Address value) |
1783 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 1784 | |
dd93cd0a | 1785 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 1786 | static inline void |
dd93cd0a | 1787 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 1788 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1789 | |
dd93cd0a | 1790 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 1791 | static inline void |
dd93cd0a AM |
1792 | addr16_ha2(unsigned char* view, Address value) |
1793 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 1794 | |
dd93cd0a | 1795 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 1796 | static inline void |
dd93cd0a | 1797 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 1798 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 1799 | |
dd93cd0a | 1800 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 1801 | static inline void |
dd93cd0a AM |
1802 | addr16_ha3(unsigned char* view, Address value) |
1803 | { This::addr16_hi3(view, value + 0x8000); } | |
1804 | ||
1805 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
1806 | static inline Status |
1807 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1808 | { |
0cfb0717 | 1809 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
1810 | if (overflow != CHECK_NONE && (value & 3) != 0) |
1811 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
1812 | return stat; |
1813 | } | |
a680de9a PB |
1814 | |
1815 | // R_POWERPC_REL16DX_HA | |
1816 | static inline Status | |
1817 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
1818 | { | |
1819 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
1820 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
1821 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
1822 | value += 0x8000; | |
1823 | value = static_cast<SignedAddress>(value) >> 16; | |
1824 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
1825 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
1826 | return overflowed<16>(value, overflow); | |
1827 | } | |
cf43a2fe AM |
1828 | }; |
1829 | ||
b4f7960d AM |
1830 | // Set ABI version for input and output. |
1831 | ||
1832 | template<int size, bool big_endian> | |
1833 | void | |
1834 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
1835 | { | |
1836 | this->e_flags_ |= ver; | |
1837 | if (this->abiversion() != 0) | |
1838 | { | |
1839 | Target_powerpc<size, big_endian>* target = | |
1840 | static_cast<Target_powerpc<size, big_endian>*>( | |
1841 | parameters->sized_target<size, big_endian>()); | |
1842 | if (target->abiversion() == 0) | |
1843 | target->set_abiversion(this->abiversion()); | |
1844 | else if (target->abiversion() != this->abiversion()) | |
1845 | gold_error(_("%s: ABI version %d is not compatible " | |
1846 | "with ABI version %d output"), | |
1847 | this->name().c_str(), | |
1848 | this->abiversion(), target->abiversion()); | |
1849 | ||
1850 | } | |
1851 | } | |
1852 | ||
5edad15d AM |
1853 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
1854 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
1855 | |
1856 | template<int size, bool big_endian> | |
1857 | bool | |
1858 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
1859 | Read_symbols_data* sd) | |
1860 | { | |
c9269dff AM |
1861 | const unsigned char* const pshdrs = sd->section_headers->data(); |
1862 | const unsigned char* namesu = sd->section_names->data(); | |
1863 | const char* names = reinterpret_cast<const char*>(namesu); | |
1864 | section_size_type names_size = sd->section_names_size; | |
1865 | const unsigned char* s; | |
1866 | ||
dc3714f3 AM |
1867 | s = this->template find_shdr<size, big_endian>(pshdrs, |
1868 | size == 32 ? ".got2" : ".opd", | |
1869 | names, names_size, NULL); | |
c9269dff AM |
1870 | if (s != NULL) |
1871 | { | |
1872 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1873 | this->special_ = ndx; | |
b4f7960d AM |
1874 | if (size == 64) |
1875 | { | |
1876 | if (this->abiversion() == 0) | |
1877 | this->set_abiversion(1); | |
1878 | else if (this->abiversion() > 1) | |
1879 | gold_error(_("%s: .opd invalid in abiv%d"), | |
1880 | this->name().c_str(), this->abiversion()); | |
1881 | } | |
c9269dff | 1882 | } |
5edad15d AM |
1883 | if (size == 64) |
1884 | { | |
1885 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
1886 | names, names_size, NULL); | |
1887 | if (s != NULL) | |
1888 | { | |
1889 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
1890 | this->relatoc_ = ndx; | |
1891 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
1892 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
1893 | } | |
1894 | } | |
c9269dff AM |
1895 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
1896 | } | |
1897 | ||
1898 | // Examine .rela.opd to build info about function entry points. | |
1899 | ||
1900 | template<int size, bool big_endian> | |
1901 | void | |
1902 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
1903 | size_t reloc_count, | |
1904 | const unsigned char* prelocs, | |
1905 | const unsigned char* plocal_syms) | |
1906 | { | |
1907 | if (size == 64) | |
cf43a2fe | 1908 | { |
0e123f69 AM |
1909 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
1910 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 1911 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
1912 | Address expected_off = 0; |
1913 | bool regular = true; | |
1914 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
1915 | |
1916 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 1917 | { |
c9269dff AM |
1918 | Reltype reloc(prelocs); |
1919 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
1920 | = reloc.get_r_info(); | |
1921 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
1922 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
1923 | { | |
1924 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
1925 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
1926 | bool is_ordinary; | |
1927 | unsigned int shndx; | |
1928 | if (r_sym < this->local_symbol_count()) | |
1929 | { | |
1930 | typename elfcpp::Sym<size, big_endian> | |
1931 | lsym(plocal_syms + r_sym * sym_size); | |
1932 | shndx = lsym.get_st_shndx(); | |
1933 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
1934 | value = lsym.get_st_value(); | |
1935 | } | |
1936 | else | |
1937 | shndx = this->symbol_section_and_value(r_sym, &value, | |
1938 | &is_ordinary); | |
1939 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
1940 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
1941 | if (i == 2) |
1942 | { | |
1943 | expected_off = reloc.get_r_offset(); | |
1944 | opd_ent_size = expected_off; | |
1945 | } | |
1946 | else if (expected_off != reloc.get_r_offset()) | |
1947 | regular = false; | |
1948 | expected_off += opd_ent_size; | |
1949 | } | |
1950 | else if (r_type == elfcpp::R_PPC64_TOC) | |
1951 | { | |
1952 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
1953 | regular = false; | |
1954 | } | |
1955 | else | |
1956 | { | |
1957 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
1958 | this->name().c_str(), r_type); | |
1959 | regular = false; | |
c9269dff AM |
1960 | } |
1961 | } | |
ec4dbad3 AM |
1962 | if (reloc_count <= 2) |
1963 | opd_ent_size = this->section_size(this->opd_shndx()); | |
1964 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
1965 | regular = false; | |
1966 | if (!regular) | |
1967 | { | |
1968 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
1969 | this->name().c_str()); | |
1970 | opd_ent_size = 0; | |
1971 | } | |
c9269dff AM |
1972 | } |
1973 | } | |
1974 | ||
5edad15d AM |
1975 | // Returns true if a code sequence loading the TOC entry at VALUE |
1976 | // relative to the TOC pointer can be converted into code calculating | |
1977 | // a TOC pointer relative offset. | |
1978 | // If so, the TOC pointer relative offset is stored to VALUE. | |
1979 | ||
1980 | template<int size, bool big_endian> | |
1981 | bool | |
1982 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
1983 | Target_powerpc<size, big_endian>* target, | |
1984 | Address* value) | |
1985 | { | |
1986 | if (size != 64) | |
1987 | return false; | |
1988 | ||
e666304e AM |
1989 | // With -mcmodel=medium code it is quite possible to have |
1990 | // toc-relative relocs referring to objects outside the TOC. | |
1991 | // Don't try to look at a non-existent TOC. | |
1992 | if (this->toc_shndx() == 0) | |
1993 | return false; | |
1994 | ||
5edad15d AM |
1995 | // Convert VALUE back to an address by adding got_base (see below), |
1996 | // then to an offset in the TOC by subtracting the TOC output | |
1997 | // section address and the TOC output offset. Since this TOC output | |
1998 | // section and the got output section are one and the same, we can | |
1999 | // omit adding and subtracting the output section address. | |
2000 | Address off = (*value + this->toc_base_offset() | |
2001 | - this->output_section_offset(this->toc_shndx())); | |
2002 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2003 | // TOC relative access to variables outside the TOC. Those of | |
2004 | // course can't be optimized. We also don't try to optimize code | |
2005 | // that is using a different object's TOC. | |
2006 | if (off >= this->section_size(this->toc_shndx())) | |
2007 | return false; | |
2008 | ||
2009 | if (this->no_toc_opt(off)) | |
2010 | return false; | |
2011 | ||
2012 | section_size_type vlen; | |
2013 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2014 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2015 | // The TOC pointer | |
2016 | Address got_base = (target->got_section()->output_section()->address() | |
2017 | + this->toc_base_offset()); | |
2018 | addr -= got_base; | |
857e829e | 2019 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2020 | return false; |
2021 | ||
2022 | *value = addr; | |
2023 | return true; | |
2024 | } | |
2025 | ||
2026 | // Perform the Sized_relobj_file method, then set up opd info from | |
2027 | // .opd relocs. | |
2028 | ||
c9269dff AM |
2029 | template<int size, bool big_endian> |
2030 | void | |
2031 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2032 | { | |
2033 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2034 | if (size == 64) | |
2035 | { | |
2036 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2037 | p != rd->relocs.end(); | |
2038 | ++p) | |
2039 | { | |
2040 | if (p->data_shndx == this->opd_shndx()) | |
2041 | { | |
ec4dbad3 AM |
2042 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2043 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2044 | if (opd_size != 0) | |
2045 | { | |
2046 | this->init_opd(opd_size); | |
2047 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2048 | rd->local_symbols->data()); | |
2049 | } | |
c9269dff AM |
2050 | break; |
2051 | } | |
cf43a2fe AM |
2052 | } |
2053 | } | |
cf43a2fe AM |
2054 | } |
2055 | ||
b4f7960d AM |
2056 | // Read the symbols then set up st_other vector. |
2057 | ||
2058 | template<int size, bool big_endian> | |
2059 | void | |
2060 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2061 | { | |
f35c4853 | 2062 | this->base_read_symbols(sd); |
b4f7960d AM |
2063 | if (size == 64) |
2064 | { | |
2065 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2066 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2067 | const unsigned int loccount = this->do_local_symbol_count(); | |
2068 | if (loccount != 0) | |
2069 | { | |
2070 | this->st_other_.resize(loccount); | |
2071 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2072 | off_t locsize = loccount * sym_size; | |
2073 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2074 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2075 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2076 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2077 | locsize, true, false); | |
2078 | psyms += sym_size; | |
2079 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2080 | { | |
2081 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2082 | unsigned char st_other = sym.get_st_other(); | |
2083 | this->st_other_[i] = st_other; | |
2084 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2085 | { | |
2086 | if (this->abiversion() == 0) | |
2087 | this->set_abiversion(2); | |
2088 | else if (this->abiversion() < 2) | |
2089 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2090 | " for ABI version 1"), | |
2091 | this->name().c_str(), i); | |
2092 | } | |
2093 | } | |
2094 | } | |
2095 | } | |
2096 | } | |
2097 | ||
2098 | template<int size, bool big_endian> | |
2099 | void | |
2100 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2101 | { | |
2102 | this->e_flags_ |= ver; | |
2103 | if (this->abiversion() != 0) | |
2104 | { | |
2105 | Target_powerpc<size, big_endian>* target = | |
2106 | static_cast<Target_powerpc<size, big_endian>*>( | |
2107 | parameters->sized_target<size, big_endian>()); | |
2108 | if (target->abiversion() == 0) | |
2109 | target->set_abiversion(this->abiversion()); | |
2110 | else if (target->abiversion() != this->abiversion()) | |
2111 | gold_error(_("%s: ABI version %d is not compatible " | |
2112 | "with ABI version %d output"), | |
2113 | this->name().c_str(), | |
2114 | this->abiversion(), target->abiversion()); | |
2115 | ||
2116 | } | |
2117 | } | |
2118 | ||
f35c4853 | 2119 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2120 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2121 | ||
2122 | template<int size, bool big_endian> | |
2123 | void | |
2124 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2125 | { | |
f35c4853 | 2126 | this->base_read_symbols(sd); |
dc3714f3 AM |
2127 | if (size == 64) |
2128 | { | |
2129 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2130 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2131 | const unsigned char* namesu = sd->section_names->data(); | |
2132 | const char* names = reinterpret_cast<const char*>(namesu); | |
2133 | const unsigned char* s = NULL; | |
2134 | const unsigned char* opd; | |
2135 | section_size_type opd_size; | |
2136 | ||
2137 | // Find and read .opd section. | |
2138 | while (1) | |
2139 | { | |
2140 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2141 | sd->section_names_size, | |
2142 | s); | |
2143 | if (s == NULL) | |
2144 | return; | |
2145 | ||
2146 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2147 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2148 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2149 | { | |
b4f7960d AM |
2150 | if (this->abiversion() == 0) |
2151 | this->set_abiversion(1); | |
2152 | else if (this->abiversion() > 1) | |
2153 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2154 | this->name().c_str(), this->abiversion()); | |
2155 | ||
dc3714f3 AM |
2156 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2157 | this->opd_address_ = shdr.get_sh_addr(); | |
2158 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2159 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2160 | true, false); | |
2161 | break; | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | // Build set of executable sections. | |
2166 | // Using a set is probably overkill. There is likely to be only | |
2167 | // a few executable sections, typically .init, .text and .fini, | |
2168 | // and they are generally grouped together. | |
2169 | typedef std::set<Sec_info> Exec_sections; | |
2170 | Exec_sections exec_sections; | |
2171 | s = pshdrs; | |
2172 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2173 | { | |
2174 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2175 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2176 | && ((shdr.get_sh_flags() | |
2177 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2178 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2179 | && shdr.get_sh_size() != 0) | |
2180 | { | |
2181 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2182 | shdr.get_sh_size(), i)); | |
2183 | } | |
2184 | } | |
2185 | if (exec_sections.empty()) | |
2186 | return; | |
2187 | ||
2188 | // Look over the OPD entries. This is complicated by the fact | |
2189 | // that some binaries will use two-word entries while others | |
2190 | // will use the standard three-word entries. In most cases | |
2191 | // the third word (the environment pointer for languages like | |
2192 | // Pascal) is unused and will be zero. If the third word is | |
2193 | // used it should not be pointing into executable sections, | |
2194 | // I think. | |
2195 | this->init_opd(opd_size); | |
2196 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2197 | { | |
2198 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2199 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2200 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2201 | if (val == 0) | |
2202 | // Chances are that this is the third word of an OPD entry. | |
2203 | continue; | |
2204 | typename Exec_sections::const_iterator e | |
2205 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2206 | if (e != exec_sections.begin()) | |
2207 | { | |
2208 | --e; | |
2209 | if (e->start <= val && val < e->start + e->len) | |
2210 | { | |
2211 | // We have an address in an executable section. | |
2212 | // VAL ought to be the function entry, set it up. | |
2213 | this->set_opd_ent(p - opd, e->shndx, val); | |
2214 | // Skip second word of OPD entry, the TOC pointer. | |
2215 | p += 8; | |
2216 | } | |
2217 | } | |
2218 | // If we didn't match any executable sections, we likely | |
2219 | // have a non-zero third word in the OPD entry. | |
2220 | } | |
2221 | } | |
2222 | } | |
2223 | ||
5edad15d AM |
2224 | // Relocate sections. |
2225 | ||
2226 | template<int size, bool big_endian> | |
2227 | void | |
2228 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2229 | const Symbol_table* symtab, const Layout* layout, | |
2230 | const unsigned char* pshdrs, Output_file* of, | |
2231 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2232 | { | |
2233 | unsigned int start = 1; | |
2234 | if (size == 64 | |
2235 | && this->relatoc_ != 0 | |
2236 | && !parameters->options().relocatable()) | |
2237 | { | |
2238 | // Relocate .toc first. | |
2239 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2240 | this->relatoc_, this->relatoc_); | |
2241 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2242 | 1, this->relatoc_ - 1); | |
2243 | start = this->relatoc_ + 1; | |
2244 | } | |
2245 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2246 | start, this->shnum() - 1); | |
2247 | } | |
2248 | ||
f43ba157 | 2249 | // Set up some symbols. |
26a4e9cb AM |
2250 | |
2251 | template<int size, bool big_endian> | |
2252 | void | |
f43ba157 AM |
2253 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2254 | Symbol_table* symtab, | |
2255 | Layout* layout) | |
26a4e9cb AM |
2256 | { |
2257 | if (size == 32) | |
2258 | { | |
bb66a627 AM |
2259 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2260 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2261 | // non-relative dynamic relocs). The proper value will be |
2262 | // updated later. | |
2263 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2264 | if (gotsym != NULL && gotsym->is_undefined()) | |
2265 | { | |
2266 | Target_powerpc<size, big_endian>* target = | |
2267 | static_cast<Target_powerpc<size, big_endian>*>( | |
2268 | parameters->sized_target<size, big_endian>()); | |
2269 | Output_data_got_powerpc<size, big_endian>* got | |
2270 | = target->got_section(symtab, layout); | |
2271 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2272 | Symbol_table::PREDEFINED, | |
2273 | got, 0, 0, | |
2274 | elfcpp::STT_OBJECT, | |
bb66a627 | 2275 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2276 | elfcpp::STV_HIDDEN, 0, |
2277 | false, false); | |
2278 | } | |
2279 | ||
2280 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2281 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2282 | if (sdasym != NULL && sdasym->is_undefined()) | |
2283 | { | |
2284 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2285 | Output_section* os | |
2286 | = layout->add_output_section_data(".sdata", 0, | |
2287 | elfcpp::SHF_ALLOC | |
2288 | | elfcpp::SHF_WRITE, | |
2289 | sdata, ORDER_SMALL_DATA, false); | |
2290 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2291 | Symbol_table::PREDEFINED, | |
2292 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2293 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2294 | 0, false, false); | |
2295 | } | |
2296 | } | |
b4f7960d AM |
2297 | else |
2298 | { | |
2299 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2300 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2301 | if (gotsym != NULL && gotsym->is_undefined()) | |
2302 | { | |
2303 | Target_powerpc<size, big_endian>* target = | |
2304 | static_cast<Target_powerpc<size, big_endian>*>( | |
2305 | parameters->sized_target<size, big_endian>()); | |
2306 | Output_data_got_powerpc<size, big_endian>* got | |
2307 | = target->got_section(symtab, layout); | |
2308 | symtab->define_in_output_data(".TOC.", NULL, | |
2309 | Symbol_table::PREDEFINED, | |
2310 | got, 0x8000, 0, | |
2311 | elfcpp::STT_OBJECT, | |
2312 | elfcpp::STB_LOCAL, | |
2313 | elfcpp::STV_HIDDEN, 0, | |
2314 | false, false); | |
2315 | } | |
2316 | } | |
26a4e9cb AM |
2317 | } |
2318 | ||
cf43a2fe AM |
2319 | // Set up PowerPC target specific relobj. |
2320 | ||
2321 | template<int size, bool big_endian> | |
2322 | Object* | |
2323 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2324 | const std::string& name, | |
2325 | Input_file* input_file, | |
2326 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2327 | { | |
2328 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2329 | // ET_EXEC files are valid input for --just-symbols/-R, |
2330 | // and we treat them as relocatable objects. | |
2331 | if (et == elfcpp::ET_REL | |
2332 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2333 | { |
2334 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2335 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2336 | obj->setup(); |
2337 | return obj; | |
2338 | } | |
2339 | else if (et == elfcpp::ET_DYN) | |
2340 | { | |
dc3714f3 AM |
2341 | Powerpc_dynobj<size, big_endian>* obj = |
2342 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2343 | obj->setup(); |
2344 | return obj; | |
2345 | } | |
2346 | else | |
2347 | { | |
c9269dff | 2348 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2349 | return NULL; |
2350 | } | |
2351 | } | |
2352 | ||
2353 | template<int size, bool big_endian> | |
2354 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2355 | { | |
2356 | public: | |
2357 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2358 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2359 | ||
2360 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2361 | : Output_data_got<size, big_endian>(), | |
2362 | symtab_(symtab), layout_(layout), | |
2363 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2364 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2365 | { |
2366 | if (size == 64) | |
2367 | this->set_addralign(256); | |
2368 | } | |
cf43a2fe | 2369 | |
e84fe78f AM |
2370 | // Override all the Output_data_got methods we use so as to first call |
2371 | // reserve_ent(). | |
2372 | bool | |
2373 | add_global(Symbol* gsym, unsigned int got_type) | |
2374 | { | |
2375 | this->reserve_ent(); | |
2376 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2377 | } | |
2378 | ||
2379 | bool | |
2380 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2381 | { | |
2382 | this->reserve_ent(); | |
2383 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2384 | } | |
2385 | ||
2386 | bool | |
2387 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2388 | { return this->add_global_plt(gsym, got_type); } | |
2389 | ||
2390 | void | |
2391 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2392 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2393 | { | |
2394 | this->reserve_ent(); | |
2395 | Output_data_got<size, big_endian>:: | |
2396 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2397 | } | |
2398 | ||
2399 | void | |
2400 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2401 | Output_data_reloc_generic* rel_dyn, | |
2402 | unsigned int r_type_1, unsigned int r_type_2) | |
2403 | { | |
2404 | this->reserve_ent(2); | |
2405 | Output_data_got<size, big_endian>:: | |
2406 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2407 | } | |
2408 | ||
2409 | bool | |
2410 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2411 | { | |
2412 | this->reserve_ent(); | |
2413 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2414 | got_type); | |
2415 | } | |
2416 | ||
2417 | bool | |
2418 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2419 | { | |
2420 | this->reserve_ent(); | |
2421 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2422 | got_type); | |
2423 | } | |
2424 | ||
2425 | bool | |
2426 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2427 | { return this->add_local_plt(object, sym_index, got_type); } | |
2428 | ||
2429 | void | |
2430 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2431 | unsigned int got_type, | |
2432 | Output_data_reloc_generic* rel_dyn, | |
2433 | unsigned int r_type) | |
2434 | { | |
2435 | this->reserve_ent(2); | |
2436 | Output_data_got<size, big_endian>:: | |
2437 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2438 | } | |
2439 | ||
2440 | unsigned int | |
2441 | add_constant(Valtype constant) | |
2442 | { | |
2443 | this->reserve_ent(); | |
2444 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2445 | } | |
2446 | ||
dd93cd0a AM |
2447 | unsigned int |
2448 | add_constant_pair(Valtype c1, Valtype c2) | |
2449 | { | |
2450 | this->reserve_ent(2); | |
e84fe78f | 2451 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2452 | } |
2453 | ||
2454 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2455 | unsigned int |
2456 | g_o_t() const | |
2457 | { | |
2458 | return this->got_offset(this->header_index_); | |
42cacb20 | 2459 | } |
cf43a2fe | 2460 | |
dd93cd0a AM |
2461 | // Offset of base used to access the GOT/TOC. |
2462 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2463 | Valtype |
dd93cd0a AM |
2464 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2465 | { | |
2466 | if (size == 32) | |
2467 | return this->g_o_t(); | |
2468 | else | |
2469 | return (this->output_section()->address() | |
2470 | + object->toc_base_offset() | |
2471 | - this->address()); | |
2472 | } | |
2473 | ||
cf43a2fe AM |
2474 | // Ensure our GOT has a header. |
2475 | void | |
2476 | set_final_data_size() | |
2477 | { | |
2478 | if (this->header_ent_cnt_ != 0) | |
2479 | this->make_header(); | |
2480 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2481 | } | |
2482 | ||
2483 | // First word of GOT header needs some values that are not | |
2484 | // handled by Output_data_got so poke them in here. | |
2485 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2486 | void | |
2487 | do_write(Output_file* of) | |
2488 | { | |
c9824451 AM |
2489 | Valtype val = 0; |
2490 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2491 | val = this->layout_->dynamic_section()->address(); | |
2492 | if (size == 64) | |
2493 | val = this->output_section()->address() + 0x8000; | |
2494 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2495 | Output_data_got<size, big_endian>::do_write(of); |
2496 | } | |
2497 | ||
2498 | private: | |
2499 | void | |
2500 | reserve_ent(unsigned int cnt = 1) | |
2501 | { | |
2502 | if (this->header_ent_cnt_ == 0) | |
2503 | return; | |
2504 | if (this->num_entries() + cnt > this->header_index_) | |
2505 | this->make_header(); | |
2506 | } | |
2507 | ||
2508 | void | |
2509 | make_header() | |
2510 | { | |
2511 | this->header_ent_cnt_ = 0; | |
2512 | this->header_index_ = this->num_entries(); | |
2513 | if (size == 32) | |
2514 | { | |
2515 | Output_data_got<size, big_endian>::add_constant(0); | |
2516 | Output_data_got<size, big_endian>::add_constant(0); | |
2517 | Output_data_got<size, big_endian>::add_constant(0); | |
2518 | ||
2519 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2520 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2521 | if (gotsym != NULL) | |
2522 | { | |
2523 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2524 | sym->set_value(this->g_o_t()); | |
2525 | } | |
2526 | else | |
2527 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2528 | Symbol_table::PREDEFINED, | |
2529 | this, this->g_o_t(), 0, | |
2530 | elfcpp::STT_OBJECT, | |
2531 | elfcpp::STB_LOCAL, | |
2532 | elfcpp::STV_HIDDEN, 0, | |
2533 | false, false); | |
cf43a2fe AM |
2534 | } |
2535 | else | |
2536 | Output_data_got<size, big_endian>::add_constant(0); | |
2537 | } | |
2538 | ||
2539 | // Stashed pointers. | |
2540 | Symbol_table* symtab_; | |
2541 | Layout* layout_; | |
2542 | ||
2543 | // GOT header size. | |
2544 | unsigned int header_ent_cnt_; | |
2545 | // GOT header index. | |
2546 | unsigned int header_index_; | |
42cacb20 DE |
2547 | }; |
2548 | ||
2549 | // Get the GOT section, creating it if necessary. | |
2550 | ||
2551 | template<int size, bool big_endian> | |
cf43a2fe | 2552 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2553 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2554 | Layout* layout) | |
2555 | { | |
2556 | if (this->got_ == NULL) | |
2557 | { | |
2558 | gold_assert(symtab != NULL && layout != NULL); | |
2559 | ||
cf43a2fe AM |
2560 | this->got_ |
2561 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2562 | |
2563 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2564 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2565 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2566 | } |
2567 | ||
2568 | return this->got_; | |
2569 | } | |
2570 | ||
2571 | // Get the dynamic reloc section, creating it if necessary. | |
2572 | ||
2573 | template<int size, bool big_endian> | |
2574 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2575 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2576 | { | |
2577 | if (this->rela_dyn_ == NULL) | |
2578 | { | |
2579 | gold_assert(layout != NULL); | |
2580 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
2581 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
2582 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
2583 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
2584 | } |
2585 | return this->rela_dyn_; | |
2586 | } | |
2587 | ||
b3ccdeb5 AM |
2588 | // Similarly, but for ifunc symbols get the one for ifunc. |
2589 | ||
2590 | template<int size, bool big_endian> | |
2591 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2592 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
2593 | Layout* layout, | |
2594 | bool for_ifunc) | |
2595 | { | |
2596 | if (!for_ifunc) | |
2597 | return this->rela_dyn_section(layout); | |
2598 | ||
2599 | if (this->iplt_ == NULL) | |
2600 | this->make_iplt_section(symtab, layout); | |
2601 | return this->iplt_->rel_plt(); | |
2602 | } | |
2603 | ||
ec661b9d AM |
2604 | class Stub_control |
2605 | { | |
2606 | public: | |
2607 | // Determine the stub group size. The group size is the absolute | |
2608 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 2609 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 2610 | // the stubbed branches. |
1c3a5fbe AM |
2611 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
2612 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
2613 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
2614 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
2615 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 2616 | { |
ec661b9d AM |
2617 | } |
2618 | ||
2619 | // Return true iff input section can be handled by current stub | |
2620 | // group. | |
2621 | bool | |
2622 | can_add_to_stub_group(Output_section* o, | |
2623 | const Output_section::Input_section* i, | |
2624 | bool has14); | |
2625 | ||
2626 | const Output_section::Input_section* | |
2627 | owner() | |
2628 | { return owner_; } | |
2629 | ||
2630 | Output_section* | |
2631 | output_section() | |
2632 | { return output_section_; } | |
2633 | ||
a20605cf AM |
2634 | void |
2635 | set_output_and_owner(Output_section* o, | |
2636 | const Output_section::Input_section* i) | |
2637 | { | |
2638 | this->output_section_ = o; | |
2639 | this->owner_ = i; | |
2640 | } | |
2641 | ||
ec661b9d AM |
2642 | private: |
2643 | typedef enum | |
2644 | { | |
1c3a5fbe | 2645 | // Initial state. |
ec661b9d | 2646 | NO_GROUP, |
1c3a5fbe | 2647 | // Adding group sections before the stubs. |
ec661b9d | 2648 | FINDING_STUB_SECTION, |
1c3a5fbe | 2649 | // Adding group sections after the stubs. |
ec661b9d AM |
2650 | HAS_STUB_SECTION |
2651 | } State; | |
2652 | ||
ec661b9d | 2653 | uint32_t stub_group_size_; |
a5018ae5 | 2654 | bool stubs_always_after_branch_; |
ec661b9d | 2655 | bool suppress_size_errors_; |
1c3a5fbe AM |
2656 | // True if a stub group can serve multiple output sections. |
2657 | bool multi_os_; | |
2658 | State state_; | |
8a37735f AM |
2659 | // Current max size of group. Starts at stub_group_size_ but is |
2660 | // reduced to stub_group_size_/1024 on seeing a section with | |
2661 | // external conditional branches. | |
2662 | uint32_t group_size_; | |
a5018ae5 | 2663 | uint64_t group_start_addr_; |
57f6d32d AM |
2664 | // owner_ and output_section_ specify the section to which stubs are |
2665 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
2666 | const Output_section::Input_section* owner_; |
2667 | Output_section* output_section_; | |
2668 | }; | |
2669 | ||
0cfdc767 | 2670 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
2671 | // group. Sections are presented to this function in order, |
2672 | // so the first section is the head of the group. | |
ec661b9d AM |
2673 | |
2674 | bool | |
2675 | Stub_control::can_add_to_stub_group(Output_section* o, | |
2676 | const Output_section::Input_section* i, | |
2677 | bool has14) | |
2678 | { | |
ec661b9d AM |
2679 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
2680 | uint64_t this_size; | |
2681 | uint64_t start_addr = o->address(); | |
2682 | ||
2683 | if (whole_sec) | |
2684 | // .init and .fini sections are pasted together to form a single | |
2685 | // function. We can't be adding stubs in the middle of the function. | |
2686 | this_size = o->data_size(); | |
2687 | else | |
2688 | { | |
2689 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
2690 | this_size = i->data_size(); | |
2691 | } | |
57f6d32d | 2692 | |
a5018ae5 | 2693 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
2694 | uint32_t group_size = this->stub_group_size_; |
2695 | if (has14) | |
2696 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 2697 | |
57f6d32d | 2698 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
2699 | gold_warning(_("%s:%s exceeds group size"), |
2700 | i->relobj()->name().c_str(), | |
2701 | i->relobj()->section_name(i->shndx()).c_str()); | |
2702 | ||
afe002dd AM |
2703 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
2704 | has14 ? " 14bit" : "", | |
2705 | i->relobj()->name().c_str(), | |
2706 | i->relobj()->section_name(i->shndx()).c_str(), | |
2707 | (long long) this_size, | |
a5018ae5 AM |
2708 | (this->state_ == NO_GROUP |
2709 | ? this_size | |
2710 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 2711 | |
1c3a5fbe AM |
2712 | if (this->state_ == NO_GROUP) |
2713 | { | |
2714 | // Only here on very first use of Stub_control | |
2715 | this->owner_ = i; | |
2716 | this->output_section_ = o; | |
2717 | this->state_ = FINDING_STUB_SECTION; | |
2718 | this->group_size_ = group_size; | |
2719 | this->group_start_addr_ = start_addr; | |
2720 | return true; | |
2721 | } | |
2722 | else if (!this->multi_os_ && this->output_section_ != o) | |
2723 | ; | |
2724 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 2725 | { |
a5018ae5 | 2726 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 2727 | // group? |
a5018ae5 | 2728 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 2729 | return true; |
ec661b9d | 2730 | } |
a5018ae5 | 2731 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 2732 | { |
a5018ae5 AM |
2733 | if ((whole_sec && this->output_section_ == o) |
2734 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2735 | { |
a5018ae5 | 2736 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
2737 | this->owner_ = i; |
2738 | this->output_section_ = o; | |
a5018ae5 | 2739 | return true; |
57f6d32d | 2740 | } |
a5018ae5 AM |
2741 | // The group before the stubs has reached maximum size. |
2742 | // Now see about adding sections after the stubs to the | |
2743 | // group. If the current section has a 14-bit branch and | |
2744 | // the group before the stubs exceeds group_size_ (because | |
2745 | // they didn't have 14-bit branches), don't add sections | |
2746 | // after the stubs: The size of stubs for such a large | |
2747 | // group may exceed the reach of a 14-bit branch. | |
2748 | if (!this->stubs_always_after_branch_ | |
2749 | && this_size <= this->group_size_ | |
2750 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 2751 | { |
a5018ae5 AM |
2752 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
2753 | this->state_ = HAS_STUB_SECTION; | |
2754 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
2755 | return true; |
2756 | } | |
ec661b9d | 2757 | } |
a5018ae5 AM |
2758 | else |
2759 | gold_unreachable(); | |
57f6d32d | 2760 | |
1c3a5fbe AM |
2761 | gold_debug(DEBUG_TARGET, |
2762 | !this->multi_os_ && this->output_section_ != o | |
2763 | ? "nope, new output section\n" | |
2764 | : "nope, didn't fit\n"); | |
afe002dd | 2765 | |
57f6d32d AM |
2766 | // The section fails to fit in the current group. Set up a few |
2767 | // things for the next group. owner_ and output_section_ will be | |
2768 | // set later after we've retrieved those values for the current | |
2769 | // group. | |
2770 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 2771 | this->group_size_ = group_size; |
a5018ae5 | 2772 | this->group_start_addr_ = start_addr; |
57f6d32d | 2773 | return false; |
ec661b9d AM |
2774 | } |
2775 | ||
2776 | // Look over all the input sections, deciding where to place stubs. | |
2777 | ||
2778 | template<int size, bool big_endian> | |
2779 | void | |
2780 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
2781 | const Task*, |
2782 | bool no_size_errors) | |
ec661b9d | 2783 | { |
1c3a5fbe AM |
2784 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
2785 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
2786 | |
2787 | // Group input sections and insert stub table | |
a3e60ddb AM |
2788 | Stub_table_owner* table_owner = NULL; |
2789 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
2790 | Layout::Section_list section_list; |
2791 | layout->get_executable_sections(§ion_list); | |
2792 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
2793 | for (Layout::Section_list::iterator o = section_list.begin(); |
2794 | o != section_list.end(); | |
ec661b9d AM |
2795 | ++o) |
2796 | { | |
2797 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
2798 | for (Input_section_list::const_iterator i |
2799 | = (*o)->input_sections().begin(); | |
2800 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
2801 | ++i) |
2802 | { | |
a3e60ddb AM |
2803 | if (i->is_input_section() |
2804 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
2805 | { |
2806 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
2807 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
2808 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
2809 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
2810 | { | |
a3e60ddb AM |
2811 | table_owner->output_section = stub_control.output_section(); |
2812 | table_owner->owner = stub_control.owner(); | |
a20605cf | 2813 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 2814 | table_owner = NULL; |
ec661b9d | 2815 | } |
a3e60ddb AM |
2816 | if (table_owner == NULL) |
2817 | { | |
2818 | table_owner = new Stub_table_owner; | |
2819 | tables.push_back(table_owner); | |
2820 | } | |
2821 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
2822 | } |
2823 | } | |
2824 | } | |
a3e60ddb | 2825 | if (table_owner != NULL) |
0cfdc767 | 2826 | { |
a5018ae5 AM |
2827 | table_owner->output_section = stub_control.output_section(); |
2828 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
2829 | } |
2830 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
2831 | t != tables.end(); | |
2832 | ++t) | |
2833 | { | |
2834 | Stub_table<size, big_endian>* stub_table; | |
2835 | ||
2836 | if ((*t)->owner->is_input_section()) | |
2837 | stub_table = new Stub_table<size, big_endian>(this, | |
2838 | (*t)->output_section, | |
2839 | (*t)->owner); | |
2840 | else if ((*t)->owner->is_relaxed_input_section()) | |
2841 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
2842 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 2843 | else |
a3e60ddb AM |
2844 | gold_unreachable(); |
2845 | this->stub_tables_.push_back(stub_table); | |
2846 | delete *t; | |
0cfdc767 | 2847 | } |
ec661b9d AM |
2848 | } |
2849 | ||
a3e60ddb AM |
2850 | static unsigned long |
2851 | max_branch_delta (unsigned int r_type) | |
2852 | { | |
2853 | if (r_type == elfcpp::R_POWERPC_REL14 | |
2854 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
2855 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
2856 | return 1L << 15; | |
2857 | if (r_type == elfcpp::R_POWERPC_REL24 | |
2858 | || r_type == elfcpp::R_PPC_PLTREL24 | |
2859 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
2860 | return 1L << 25; | |
2861 | return 0; | |
2862 | } | |
2863 | ||
ec661b9d AM |
2864 | // If this branch needs a plt call stub, or a long branch stub, make one. |
2865 | ||
2866 | template<int size, bool big_endian> | |
a3e60ddb | 2867 | bool |
ec661b9d AM |
2868 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
2869 | Stub_table<size, big_endian>* stub_table, | |
2870 | Stub_table<size, big_endian>* ifunc_stub_table, | |
2871 | Symbol_table* symtab) const | |
2872 | { | |
2873 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
2874 | if (sym != NULL && sym->is_forwarder()) | |
2875 | sym = symtab->resolve_forwards(sym); | |
2876 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); | |
88b8e639 AM |
2877 | Target_powerpc<size, big_endian>* target = |
2878 | static_cast<Target_powerpc<size, big_endian>*>( | |
2879 | parameters->sized_target<size, big_endian>()); | |
dc60b26d AM |
2880 | bool ok = true; |
2881 | ||
ec661b9d | 2882 | if (gsym != NULL |
88b8e639 | 2883 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
2884 | : this->object_->local_has_plt_offset(this->r_sym_)) |
2885 | { | |
9055360d AM |
2886 | if (size == 64 |
2887 | && gsym != NULL | |
2888 | && target->abiversion() >= 2 | |
2889 | && !parameters->options().output_is_position_independent() | |
2890 | && !is_branch_reloc(this->r_type_)) | |
2891 | target->glink_section()->add_global_entry(gsym); | |
2892 | else | |
ec661b9d | 2893 | { |
9055360d AM |
2894 | if (stub_table == NULL) |
2895 | stub_table = this->object_->stub_table(this->shndx_); | |
2896 | if (stub_table == NULL) | |
2897 | { | |
2898 | // This is a ref from a data section to an ifunc symbol. | |
2899 | stub_table = ifunc_stub_table; | |
2900 | } | |
2901 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
2902 | Address from = this->object_->get_output_section_offset(this->shndx_); |
2903 | if (from != invalid_address) | |
2904 | from += (this->object_->output_section(this->shndx_)->address() | |
2905 | + this->offset_); | |
9055360d | 2906 | if (gsym != NULL) |
dc60b26d AM |
2907 | ok = stub_table->add_plt_call_entry(from, |
2908 | this->object_, gsym, | |
2909 | this->r_type_, this->addend_); | |
9055360d | 2910 | else |
dc60b26d AM |
2911 | ok = stub_table->add_plt_call_entry(from, |
2912 | this->object_, this->r_sym_, | |
2913 | this->r_type_, this->addend_); | |
ec661b9d | 2914 | } |
ec661b9d AM |
2915 | } |
2916 | else | |
2917 | { | |
cbcb23fa | 2918 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
2919 | if (max_branch_offset == 0) |
2920 | return true; | |
ec661b9d AM |
2921 | Address from = this->object_->get_output_section_offset(this->shndx_); |
2922 | gold_assert(from != invalid_address); | |
2923 | from += (this->object_->output_section(this->shndx_)->address() | |
2924 | + this->offset_); | |
2925 | Address to; | |
2926 | if (gsym != NULL) | |
2927 | { | |
2928 | switch (gsym->source()) | |
2929 | { | |
2930 | case Symbol::FROM_OBJECT: | |
2931 | { | |
2932 | Object* symobj = gsym->object(); | |
2933 | if (symobj->is_dynamic() | |
2934 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 2935 | return true; |
ec661b9d AM |
2936 | bool is_ordinary; |
2937 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
2938 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 2939 | return true; |
ec661b9d AM |
2940 | } |
2941 | break; | |
2942 | ||
2943 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 2944 | return true; |
ec661b9d AM |
2945 | |
2946 | default: | |
2947 | break; | |
2948 | } | |
2949 | Symbol_table::Compute_final_value_status status; | |
2950 | to = symtab->compute_final_value<size>(gsym, &status); | |
2951 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 2952 | return true; |
9055360d AM |
2953 | if (size == 64) |
2954 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
2955 | } |
2956 | else | |
2957 | { | |
2958 | const Symbol_value<size>* psymval | |
2959 | = this->object_->local_symbol(this->r_sym_); | |
2960 | Symbol_value<size> symval; | |
0f125432 CC |
2961 | if (psymval->is_section_symbol()) |
2962 | symval.set_is_section_symbol(); | |
ec661b9d AM |
2963 | typedef Sized_relobj_file<size, big_endian> ObjType; |
2964 | typename ObjType::Compute_final_local_value_status status | |
2965 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
2966 | &symval, symtab); | |
2967 | if (status != ObjType::CFLV_OK | |
2968 | || !symval.has_output_value()) | |
a3e60ddb | 2969 | return true; |
ec661b9d | 2970 | to = symval.value(this->object_, 0); |
9055360d AM |
2971 | if (size == 64) |
2972 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 2973 | } |
cbcb23fa AM |
2974 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
2975 | to += this->addend_; | |
ec661b9d AM |
2976 | if (stub_table == NULL) |
2977 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 2978 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
2979 | { |
2980 | unsigned int dest_shndx; | |
1611bc4a AM |
2981 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
2982 | &to, &dest_shndx)) | |
2983 | return true; | |
ec661b9d AM |
2984 | } |
2985 | Address delta = to - from; | |
2986 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
2987 | { | |
0cfdc767 AM |
2988 | if (stub_table == NULL) |
2989 | { | |
2990 | gold_warning(_("%s:%s: branch in non-executable section," | |
2991 | " no long branch stub for you"), | |
2992 | this->object_->name().c_str(), | |
2993 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 2994 | return true; |
0cfdc767 | 2995 | } |
d49044c7 AM |
2996 | bool save_res = (size == 64 |
2997 | && gsym != NULL | |
2998 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
2999 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3000 | ok = stub_table->add_long_branch_entry(this->object_, |
3001 | this->r_type_, | |
3002 | from, to, save_res); | |
ec661b9d AM |
3003 | } |
3004 | } | |
dc60b26d AM |
3005 | if (!ok) |
3006 | gold_debug(DEBUG_TARGET, | |
3007 | "branch at %s:%s+%#lx\n" | |
3008 | "can't reach stub attached to %s:%s", | |
3009 | this->object_->name().c_str(), | |
3010 | this->object_->section_name(this->shndx_).c_str(), | |
3011 | (unsigned long) this->offset_, | |
3012 | stub_table->relobj()->name().c_str(), | |
3013 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3014 | ||
3015 | return ok; | |
ec661b9d AM |
3016 | } |
3017 | ||
3018 | // Relaxation hook. This is where we do stub generation. | |
3019 | ||
3020 | template<int size, bool big_endian> | |
3021 | bool | |
3022 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3023 | const Input_objects*, | |
3024 | Symbol_table* symtab, | |
3025 | Layout* layout, | |
3026 | const Task* task) | |
3027 | { | |
3028 | unsigned int prev_brlt_size = 0; | |
3029 | if (pass == 1) | |
ec661b9d | 3030 | { |
b4f7960d AM |
3031 | bool thread_safe |
3032 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3033 | if (size == 64 | |
3034 | && this->abiversion() < 2 | |
3035 | && !thread_safe | |
3036 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3037 | { |
e2458743 | 3038 | static const char* const thread_starter[] = |
9e69ed50 AM |
3039 | { |
3040 | "pthread_create", | |
3041 | /* libstdc++ */ | |
3042 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3043 | /* librt */ | |
3044 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3045 | "mq_notify", "create_timer", | |
3046 | /* libanl */ | |
3047 | "getaddrinfo_a", | |
3048 | /* libgomp */ | |
80272b8c | 3049 | "GOMP_parallel", |
9e69ed50 | 3050 | "GOMP_parallel_start", |
80272b8c | 3051 | "GOMP_parallel_loop_static", |
9e69ed50 | 3052 | "GOMP_parallel_loop_static_start", |
80272b8c | 3053 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3054 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3055 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3056 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3057 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3058 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3059 | "GOMP_parallel_sections", |
43819297 | 3060 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3061 | /* libgo */ |
3062 | "__go_go", | |
9e69ed50 AM |
3063 | }; |
3064 | ||
e2458743 AM |
3065 | if (parameters->options().shared()) |
3066 | thread_safe = true; | |
3067 | else | |
9e69ed50 | 3068 | { |
e2458743 AM |
3069 | for (unsigned int i = 0; |
3070 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3071 | i++) | |
3072 | { | |
3073 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3074 | thread_safe = (sym != NULL | |
3075 | && sym->in_reg() | |
3076 | && sym->in_real_elf()); | |
3077 | if (thread_safe) | |
3078 | break; | |
3079 | } | |
9e69ed50 | 3080 | } |
ec661b9d | 3081 | } |
9e69ed50 | 3082 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3083 | } |
3084 | ||
3085 | if (pass == 1) | |
3086 | { | |
3087 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3088 | bool no_size_errors = true; | |
3089 | if (this->stub_group_size_ == 1) | |
3090 | this->stub_group_size_ = 0x1c00000; | |
3091 | else if (this->stub_group_size_ == -1) | |
3092 | this->stub_group_size_ = -0x1e00000; | |
3093 | else | |
3094 | no_size_errors = false; | |
3095 | this->group_sections(layout, task, no_size_errors); | |
3096 | } | |
3097 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3098 | { | |
3099 | this->branch_lookup_table_.clear(); | |
3100 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3101 | p != this->stub_tables_.end(); | |
3102 | ++p) | |
3103 | { | |
3104 | (*p)->clear_stubs(true); | |
3105 | } | |
3106 | this->stub_tables_.clear(); | |
3107 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3108 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3109 | program_name, this->stub_group_size_); |
3110 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3111 | } |
3112 | ||
3113 | // We need address of stub tables valid for make_stub. | |
3114 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3115 | p != this->stub_tables_.end(); | |
3116 | ++p) | |
3117 | { | |
3118 | const Powerpc_relobj<size, big_endian>* object | |
3119 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3120 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3121 | gold_assert(off != invalid_address); | |
3122 | Output_section* os = (*p)->output_section(); | |
3123 | (*p)->set_address_and_size(os, off); | |
3124 | } | |
3125 | ||
9e69ed50 AM |
3126 | if (pass != 1) |
3127 | { | |
3128 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3129 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3130 | this->branch_lookup_table_.clear(); | |
3131 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3132 | p != this->stub_tables_.end(); | |
3133 | ++p) | |
3134 | { | |
a3e60ddb | 3135 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3136 | } |
3137 | } | |
3138 | ||
3139 | // Build all the stubs. | |
a3e60ddb | 3140 | this->relax_failed_ = false; |
ec661b9d AM |
3141 | Stub_table<size, big_endian>* ifunc_stub_table |
3142 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3143 | Stub_table<size, big_endian>* one_stub_table | |
3144 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3145 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3146 | b != this->branch_info_.end(); | |
3147 | b++) | |
3148 | { | |
a3e60ddb AM |
3149 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3150 | && !this->relax_failed_) | |
3151 | { | |
3152 | this->relax_failed_ = true; | |
3153 | this->relax_fail_count_++; | |
3154 | if (this->relax_fail_count_ < 3) | |
3155 | return true; | |
3156 | } | |
ec661b9d AM |
3157 | } |
3158 | ||
9e69ed50 | 3159 | // Did anything change size? |
ec661b9d AM |
3160 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3161 | bool again = num_huge_branches != prev_brlt_size; | |
3162 | if (size == 64 && num_huge_branches != 0) | |
3163 | this->make_brlt_section(layout); | |
3164 | if (size == 64 && again) | |
3165 | this->brlt_section_->set_current_size(num_huge_branches); | |
3166 | ||
3167 | typedef Unordered_set<Output_section*> Output_sections; | |
3168 | Output_sections os_need_update; | |
3169 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3170 | p != this->stub_tables_.end(); | |
3171 | ++p) | |
3172 | { | |
3173 | if ((*p)->size_update()) | |
3174 | { | |
3175 | again = true; | |
9d5781f8 | 3176 | (*p)->add_eh_frame(layout); |
ec661b9d AM |
3177 | os_need_update.insert((*p)->output_section()); |
3178 | } | |
3179 | } | |
3180 | ||
9e69ed50 AM |
3181 | // Set output section offsets for all input sections in an output |
3182 | // section that just changed size. Anything past the stubs will | |
3183 | // need updating. | |
ec661b9d AM |
3184 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3185 | p != os_need_update.end(); | |
3186 | p++) | |
3187 | { | |
3188 | Output_section* os = *p; | |
3189 | Address off = 0; | |
3190 | typedef Output_section::Input_section_list Input_section_list; | |
3191 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3192 | i != os->input_sections().end(); | |
3193 | ++i) | |
3194 | { | |
3195 | off = align_address(off, i->addralign()); | |
3196 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3197 | i->relobj()->set_section_offset(i->shndx(), off); | |
3198 | if (i->is_relaxed_input_section()) | |
3199 | { | |
3200 | Stub_table<size, big_endian>* stub_table | |
3201 | = static_cast<Stub_table<size, big_endian>*>( | |
3202 | i->relaxed_input_section()); | |
6395d38b HS |
3203 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3204 | off += stub_table_size; | |
3205 | // After a few iterations, set current stub table size | |
3206 | // as min size threshold, so later stub tables can only | |
3207 | // grow in size. | |
3208 | if (pass >= 4) | |
3209 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3210 | } |
3211 | else | |
3212 | off += i->data_size(); | |
3213 | } | |
6830ee24 AM |
3214 | // If .branch_lt is part of this output section, then we have |
3215 | // just done the offset adjustment. | |
ec661b9d AM |
3216 | os->clear_section_offsets_need_adjustment(); |
3217 | } | |
3218 | ||
3219 | if (size == 64 | |
3220 | && !again | |
3221 | && num_huge_branches != 0 | |
3222 | && parameters->options().output_is_position_independent()) | |
3223 | { | |
3224 | // Fill in the BRLT relocs. | |
06f30c9d | 3225 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3226 | for (typename Branch_lookup_table::const_iterator p |
3227 | = this->branch_lookup_table_.begin(); | |
3228 | p != this->branch_lookup_table_.end(); | |
3229 | ++p) | |
3230 | { | |
3231 | this->brlt_section_->add_reloc(p->first, p->second); | |
3232 | } | |
06f30c9d | 3233 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d AM |
3234 | } |
3235 | return again; | |
3236 | } | |
3237 | ||
9d5781f8 AM |
3238 | template<int size, bool big_endian> |
3239 | void | |
3240 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3241 | unsigned char* oview, | |
3242 | uint64_t* paddress, | |
3243 | off_t* plen) const | |
3244 | { | |
3245 | uint64_t address = plt->address(); | |
3246 | off_t len = plt->data_size(); | |
3247 | ||
3248 | if (plt == this->glink_) | |
3249 | { | |
3250 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3251 | if (len == 0) |
3252 | { | |
3253 | gold_assert(parameters->doing_static_link()); | |
3254 | // Static linking may need stubs, to support ifunc and long | |
3255 | // branches. We need to create an output section for | |
3256 | // .eh_frame early in the link process, to have a place to | |
3257 | // attach stub .eh_frame info. We also need to have | |
3258 | // registered a CIE that matches the stub CIE. Both of | |
3259 | // these requirements are satisfied by creating an FDE and | |
3260 | // CIE for .glink, even though static linking will leave | |
3261 | // .glink zero length. | |
3262 | // ??? Hopefully generating an FDE with a zero address range | |
3263 | // won't confuse anything that consumes .eh_frame info. | |
3264 | } | |
3265 | else if (size == 64) | |
9d5781f8 AM |
3266 | { |
3267 | // There is one word before __glink_PLTresolve | |
3268 | address += 8; | |
3269 | len -= 8; | |
3270 | } | |
3271 | else if (parameters->options().output_is_position_independent()) | |
3272 | { | |
3273 | // There are two FDEs for a position independent glink. | |
3274 | // The first covers the branch table, the second | |
3275 | // __glink_PLTresolve at the end of glink. | |
3276 | off_t resolve_size = this->glink_->pltresolve_size; | |
5fe7ffdc | 3277 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3278 | len -= resolve_size; |
3279 | else | |
3280 | { | |
3281 | address += len - resolve_size; | |
3282 | len = resolve_size; | |
3283 | } | |
3284 | } | |
3285 | } | |
3286 | else | |
3287 | { | |
3288 | // Must be a stub table. | |
3289 | const Stub_table<size, big_endian>* stub_table | |
3290 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3291 | uint64_t stub_address = stub_table->stub_address(); | |
3292 | len -= stub_address - address; | |
3293 | address = stub_address; | |
3294 | } | |
3295 | ||
3296 | *paddress = address; | |
3297 | *plen = len; | |
3298 | } | |
3299 | ||
42cacb20 DE |
3300 | // A class to handle the PLT data. |
3301 | ||
3302 | template<int size, bool big_endian> | |
cf43a2fe | 3303 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3304 | { |
3305 | public: | |
3306 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3307 | size, big_endian> Reloc_section; | |
3308 | ||
e5d5f5ed AM |
3309 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3310 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3311 | const char* name) |
3312 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3313 | rel_(plt_rel), | |
3314 | targ_(targ), | |
e5d5f5ed AM |
3315 | name_(name) |
3316 | { } | |
42cacb20 DE |
3317 | |
3318 | // Add an entry to the PLT. | |
03e25981 | 3319 | void |
cf43a2fe | 3320 | add_entry(Symbol*); |
42cacb20 | 3321 | |
03e25981 | 3322 | void |
e5d5f5ed AM |
3323 | add_ifunc_entry(Symbol*); |
3324 | ||
03e25981 | 3325 | void |
e5d5f5ed AM |
3326 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3327 | ||
42cacb20 | 3328 | // Return the .rela.plt section data. |
e5d5f5ed | 3329 | Reloc_section* |
cf43a2fe AM |
3330 | rel_plt() const |
3331 | { | |
42cacb20 DE |
3332 | return this->rel_; |
3333 | } | |
3334 | ||
0e70b911 CC |
3335 | // Return the number of PLT entries. |
3336 | unsigned int | |
3337 | entry_count() const | |
d83ce4e3 | 3338 | { |
b3ccdeb5 AM |
3339 | if (this->current_data_size() == 0) |
3340 | return 0; | |
b4f7960d AM |
3341 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3342 | / this->plt_entry_size()); | |
d83ce4e3 | 3343 | } |
0e70b911 | 3344 | |
42cacb20 | 3345 | protected: |
42cacb20 | 3346 | void |
cf43a2fe | 3347 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3348 | { |
cf43a2fe | 3349 | os->set_entsize(0); |
42cacb20 DE |
3350 | } |
3351 | ||
6ce78956 AM |
3352 | // Write to a map file. |
3353 | void | |
3354 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3355 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3356 | |
cf43a2fe | 3357 | private: |
b4f7960d AM |
3358 | // Return the offset of the first non-reserved PLT entry. |
3359 | unsigned int | |
3360 | first_plt_entry_offset() const | |
3361 | { | |
3362 | // IPLT has no reserved entry. | |
3363 | if (this->name_[3] == 'I') | |
3364 | return 0; | |
3365 | return this->targ_->first_plt_entry_offset(); | |
3366 | } | |
3367 | ||
3368 | // Return the size of each PLT entry. | |
3369 | unsigned int | |
3370 | plt_entry_size() const | |
3371 | { | |
3372 | return this->targ_->plt_entry_size(); | |
3373 | } | |
cf43a2fe | 3374 | |
42cacb20 DE |
3375 | // Write out the PLT data. |
3376 | void | |
3377 | do_write(Output_file*); | |
3378 | ||
3379 | // The reloc section. | |
3380 | Reloc_section* rel_; | |
cf43a2fe AM |
3381 | // Allows access to .glink for do_write. |
3382 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3383 | // What to report in map file. |
3384 | const char *name_; | |
42cacb20 DE |
3385 | }; |
3386 | ||
e5d5f5ed | 3387 | // Add an entry to the PLT. |
42cacb20 DE |
3388 | |
3389 | template<int size, bool big_endian> | |
03e25981 | 3390 | void |
e5d5f5ed | 3391 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3392 | { |
e5d5f5ed AM |
3393 | if (!gsym->has_plt_offset()) |
3394 | { | |
ec661b9d | 3395 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3396 | if (off == 0) |
3397 | off += this->first_plt_entry_offset(); | |
3398 | gsym->set_plt_offset(off); | |
3399 | gsym->set_needs_dynsym_entry(); | |
3400 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3401 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3402 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3403 | this->set_current_data_size(off); |
3404 | } | |
42cacb20 DE |
3405 | } |
3406 | ||
e5d5f5ed | 3407 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3408 | |
3409 | template<int size, bool big_endian> | |
03e25981 | 3410 | void |
e5d5f5ed | 3411 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3412 | { |
cf43a2fe AM |
3413 | if (!gsym->has_plt_offset()) |
3414 | { | |
ec661b9d | 3415 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3416 | gsym->set_plt_offset(off); |
e5d5f5ed | 3417 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3418 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3419 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3420 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3421 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3422 | this->set_current_data_size(off); |
3423 | } | |
3424 | } | |
3425 | ||
3426 | // Add an entry for a local ifunc symbol to the IPLT. | |
3427 | ||
3428 | template<int size, bool big_endian> | |
03e25981 | 3429 | void |
e5d5f5ed AM |
3430 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3431 | Sized_relobj_file<size, big_endian>* relobj, | |
3432 | unsigned int local_sym_index) | |
3433 | { | |
3434 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3435 | { | |
ec661b9d | 3436 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3437 | relobj->set_local_plt_offset(local_sym_index, off); |
3438 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3439 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3440 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3441 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3442 | this, off, 0); | |
b4f7960d | 3443 | off += this->plt_entry_size(); |
cf43a2fe AM |
3444 | this->set_current_data_size(off); |
3445 | } | |
42cacb20 DE |
3446 | } |
3447 | ||
dd93cd0a | 3448 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3449 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3450 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3451 | static const uint32_t add_3_3_2 = 0x7c631214; |
3452 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
3453 | static const uint32_t add_11_0_11 = 0x7d605a14; | |
b4f7960d AM |
3454 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3455 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3456 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3457 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3458 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3459 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3460 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3461 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3462 | static const uint32_t addis_0_2 = 0x3c020000; |
3463 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3464 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3465 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
3466 | static const uint32_t addis_11_11 = 0x3d6b0000; |
3467 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 3468 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 3469 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 3470 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
3471 | static const uint32_t b = 0x48000000; |
3472 | static const uint32_t bcl_20_31 = 0x429f0005; | |
3473 | static const uint32_t bctr = 0x4e800420; | |
f3a0ed29 | 3474 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 3475 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 3476 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 3477 | static const uint32_t cmpldi_2_0 = 0x28220000; |
dd93cd0a AM |
3478 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
3479 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
3480 | static const uint32_t ld_0_1 = 0xe8010000; |
3481 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 3482 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 3483 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 3484 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 3485 | static const uint32_t ld_2_12 = 0xe84c0000; |
b4f7960d AM |
3486 | static const uint32_t ld_11_2 = 0xe9620000; |
3487 | static const uint32_t ld_11_11 = 0xe96b0000; | |
3488 | static const uint32_t ld_12_2 = 0xe9820000; | |
3489 | static const uint32_t ld_12_11 = 0xe98b0000; | |
9055360d | 3490 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 3491 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 3492 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 3493 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 3494 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 3495 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
3496 | static const uint32_t lis_11 = 0x3d600000; |
3497 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 3498 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff AM |
3499 | static const uint32_t lwz_0_12 = 0x800c0000; |
3500 | static const uint32_t lwz_11_11 = 0x816b0000; | |
3501 | static const uint32_t lwz_11_30 = 0x817e0000; | |
3502 | static const uint32_t lwz_12_12 = 0x818c0000; | |
dd93cd0a | 3503 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 3504 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 3505 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff AM |
3506 | static const uint32_t mflr_12 = 0x7d8802a6; |
3507 | static const uint32_t mtctr_0 = 0x7c0903a6; | |
3508 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 3509 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 3510 | static const uint32_t mtlr_0 = 0x7c0803a6; |
c9269dff | 3511 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 3512 | static const uint32_t nop = 0x60000000; |
c9269dff | 3513 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 3514 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
3515 | static const uint32_t std_0_1 = 0xf8010000; |
3516 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 3517 | static const uint32_t std_2_1 = 0xf8410000; |
f3a0ed29 AM |
3518 | static const uint32_t stfd_0_1 = 0xd8010000; |
3519 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 3520 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
3521 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
3522 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
3523 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
3524 | |
3525 | // Write out the PLT. | |
3526 | ||
3527 | template<int size, bool big_endian> | |
3528 | void | |
3529 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3530 | { | |
b3ccdeb5 | 3531 | if (size == 32 && this->name_[3] != 'I') |
cf43a2fe | 3532 | { |
ec661b9d | 3533 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
3534 | const section_size_type oview_size |
3535 | = convert_to_section_size_type(this->data_size()); | |
3536 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3537 | unsigned char* pov = oview; | |
3538 | unsigned char* endpov = oview + oview_size; | |
3539 | ||
e5d5f5ed | 3540 | // The address of the .glink branch table |
cf43a2fe AM |
3541 | const Output_data_glink<size, big_endian>* glink |
3542 | = this->targ_->glink_section(); | |
ec661b9d | 3543 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
3544 | |
3545 | while (pov < endpov) | |
3546 | { | |
3547 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
3548 | pov += 4; | |
3549 | branch_tab += 4; | |
3550 | } | |
3551 | ||
3552 | of->write_output_view(offset, oview_size, oview); | |
3553 | } | |
3554 | } | |
3555 | ||
3556 | // Create the PLT section. | |
3557 | ||
3558 | template<int size, bool big_endian> | |
3559 | void | |
40b469d7 AM |
3560 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
3561 | Layout* layout) | |
cf43a2fe AM |
3562 | { |
3563 | if (this->plt_ == NULL) | |
3564 | { | |
40b469d7 AM |
3565 | if (this->got_ == NULL) |
3566 | this->got_section(symtab, layout); | |
3567 | ||
cf43a2fe AM |
3568 | if (this->glink_ == NULL) |
3569 | make_glink_section(layout); | |
3570 | ||
3571 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
3572 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 3573 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
3574 | this->rela_dyn_section(layout); |
3575 | ||
e5d5f5ed AM |
3576 | Reloc_section* plt_rel = new Reloc_section(false); |
3577 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
3578 | elfcpp::SHF_ALLOC, plt_rel, | |
3579 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
3580 | this->plt_ | |
3581 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 3582 | "** PLT"); |
cf43a2fe AM |
3583 | layout->add_output_section_data(".plt", |
3584 | (size == 32 | |
3585 | ? elfcpp::SHT_PROGBITS | |
3586 | : elfcpp::SHT_NOBITS), | |
3587 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3588 | this->plt_, | |
3589 | (size == 32 | |
3590 | ? ORDER_SMALL_DATA | |
3591 | : ORDER_SMALL_BSS), | |
3592 | false); | |
3254d32c AM |
3593 | |
3594 | Output_section* rela_plt_os = plt_rel->output_section(); | |
3595 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
3596 | } |
3597 | } | |
3598 | ||
e5d5f5ed AM |
3599 | // Create the IPLT section. |
3600 | ||
3601 | template<int size, bool big_endian> | |
3602 | void | |
40b469d7 AM |
3603 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
3604 | Layout* layout) | |
e5d5f5ed AM |
3605 | { |
3606 | if (this->iplt_ == NULL) | |
3607 | { | |
40b469d7 | 3608 | this->make_plt_section(symtab, layout); |
e5d5f5ed AM |
3609 | |
3610 | Reloc_section* iplt_rel = new Reloc_section(false); | |
3611 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
3612 | this->iplt_ | |
3613 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 3614 | "** IPLT"); |
e5d5f5ed | 3615 | this->plt_->output_section()->add_output_section_data(this->iplt_); |
e5d5f5ed AM |
3616 | } |
3617 | } | |
3618 | ||
ec661b9d | 3619 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
3620 | |
3621 | template<int size, bool big_endian> | |
ec661b9d | 3622 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
3623 | { |
3624 | public: | |
ec661b9d AM |
3625 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
3626 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3627 | size, big_endian> Reloc_section; | |
c9269dff | 3628 | |
ec661b9d AM |
3629 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
3630 | Reloc_section* brlt_rel) | |
3631 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3632 | rel_(brlt_rel), | |
3633 | targ_(targ) | |
3634 | { } | |
cf43a2fe | 3635 | |
06f30c9d CC |
3636 | void |
3637 | reset_brlt_sizes() | |
3638 | { | |
3639 | this->reset_data_size(); | |
3640 | this->rel_->reset_data_size(); | |
3641 | } | |
3642 | ||
3643 | void | |
3644 | finalize_brlt_sizes() | |
3645 | { | |
3646 | this->finalize_data_size(); | |
3647 | this->rel_->finalize_data_size(); | |
3648 | } | |
3649 | ||
ec661b9d | 3650 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 3651 | void |
ec661b9d AM |
3652 | add_reloc(Address to, unsigned int off) |
3653 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 3654 | |
ec661b9d | 3655 | // Update section and reloc section size. |
e5d5f5ed | 3656 | void |
ec661b9d AM |
3657 | set_current_size(unsigned int num_branches) |
3658 | { | |
3659 | this->reset_address_and_file_offset(); | |
3660 | this->set_current_data_size(num_branches * 16); | |
3661 | this->finalize_data_size(); | |
3662 | Output_section* os = this->output_section(); | |
3663 | os->set_section_offsets_need_adjustment(); | |
3664 | if (this->rel_ != NULL) | |
3665 | { | |
0e123f69 | 3666 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
3667 | this->rel_->reset_address_and_file_offset(); |
3668 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
3669 | this->rel_->finalize_data_size(); | |
3670 | Output_section* os = this->rel_->output_section(); | |
3671 | os->set_section_offsets_need_adjustment(); | |
3672 | } | |
3673 | } | |
cf43a2fe | 3674 | |
ec661b9d AM |
3675 | protected: |
3676 | void | |
3677 | do_adjust_output_section(Output_section* os) | |
3678 | { | |
3679 | os->set_entsize(0); | |
3680 | } | |
e5d5f5ed | 3681 | |
ec661b9d AM |
3682 | // Write to a map file. |
3683 | void | |
3684 | do_print_to_mapfile(Mapfile* mapfile) const | |
3685 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 3686 | |
ec661b9d AM |
3687 | private: |
3688 | // Write out the BRLT data. | |
3689 | void | |
3690 | do_write(Output_file*); | |
c9824451 | 3691 | |
ec661b9d AM |
3692 | // The reloc section. |
3693 | Reloc_section* rel_; | |
3694 | Target_powerpc<size, big_endian>* targ_; | |
3695 | }; | |
cf43a2fe | 3696 | |
ec661b9d AM |
3697 | // Make the branch lookup table section. |
3698 | ||
3699 | template<int size, bool big_endian> | |
3700 | void | |
3701 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
3702 | { | |
3703 | if (size == 64 && this->brlt_section_ == NULL) | |
3704 | { | |
3705 | Reloc_section* brlt_rel = NULL; | |
3706 | bool is_pic = parameters->options().output_is_position_independent(); | |
3707 | if (is_pic) | |
3708 | { | |
6830ee24 AM |
3709 | // When PIC we can't fill in .branch_lt (like .plt it can be |
3710 | // a bss style section) but must initialise at runtime via | |
ec661b9d AM |
3711 | // dynamic relocats. |
3712 | this->rela_dyn_section(layout); | |
3713 | brlt_rel = new Reloc_section(false); | |
3714 | this->rela_dyn_->output_section()->add_output_section_data(brlt_rel); | |
3715 | } | |
3716 | this->brlt_section_ | |
3717 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
3718 | if (this->plt_ && is_pic) | |
3719 | this->plt_->output_section() | |
3720 | ->add_output_section_data(this->brlt_section_); | |
3721 | else | |
6830ee24 | 3722 | layout->add_output_section_data(".branch_lt", |
ec661b9d AM |
3723 | (is_pic ? elfcpp::SHT_NOBITS |
3724 | : elfcpp::SHT_PROGBITS), | |
3725 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
3726 | this->brlt_section_, | |
3727 | (is_pic ? ORDER_SMALL_BSS | |
3728 | : ORDER_SMALL_DATA), | |
3729 | false); | |
3730 | } | |
3731 | } | |
3732 | ||
6830ee24 | 3733 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
3734 | |
3735 | template<int size, bool big_endian> | |
3736 | void | |
3737 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
3738 | { | |
3739 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
3740 | { | |
3741 | const section_size_type offset = this->offset(); | |
3742 | const section_size_type oview_size | |
3743 | = convert_to_section_size_type(this->data_size()); | |
3744 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
3745 | ||
3746 | this->targ_->write_branch_lookup_table(oview); | |
3747 | of->write_output_view(offset, oview_size, oview); | |
3748 | } | |
3749 | } | |
3750 | ||
9e69ed50 AM |
3751 | static inline uint32_t |
3752 | l(uint32_t a) | |
3753 | { | |
3754 | return a & 0xffff; | |
3755 | } | |
3756 | ||
3757 | static inline uint32_t | |
3758 | hi(uint32_t a) | |
3759 | { | |
3760 | return l(a >> 16); | |
3761 | } | |
3762 | ||
3763 | static inline uint32_t | |
3764 | ha(uint32_t a) | |
3765 | { | |
3766 | return hi(a + 0x8000); | |
3767 | } | |
3768 | ||
9d5781f8 AM |
3769 | template<int size> |
3770 | struct Eh_cie | |
3771 | { | |
3772 | static const unsigned char eh_frame_cie[12]; | |
3773 | }; | |
3774 | ||
3775 | template<int size> | |
3776 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
3777 | { | |
3778 | 1, // CIE version. | |
3779 | 'z', 'R', 0, // Augmentation string. | |
3780 | 4, // Code alignment. | |
3781 | 0x80 - size / 8 , // Data alignment. | |
3782 | 65, // RA reg. | |
3783 | 1, // Augmentation size. | |
3784 | (elfcpp::DW_EH_PE_pcrel | |
3785 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
3786 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
3787 | }; | |
3788 | ||
b4f7960d AM |
3789 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
3790 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
3791 | { |
3792 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3793 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3794 | 0, // Augmentation size. | |
3795 | elfcpp::DW_CFA_advance_loc + 1, | |
3796 | elfcpp::DW_CFA_register, 65, 12, | |
3797 | elfcpp::DW_CFA_advance_loc + 4, | |
3798 | elfcpp::DW_CFA_restore_extended, 65 | |
3799 | }; | |
3800 | ||
b4f7960d AM |
3801 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
3802 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
3803 | { | |
3804 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3805 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3806 | 0, // Augmentation size. | |
3807 | elfcpp::DW_CFA_advance_loc + 1, | |
3808 | elfcpp::DW_CFA_register, 65, 0, | |
3809 | elfcpp::DW_CFA_advance_loc + 4, | |
3810 | elfcpp::DW_CFA_restore_extended, 65 | |
3811 | }; | |
3812 | ||
9d5781f8 AM |
3813 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
3814 | static const unsigned char glink_eh_frame_fde_32[] = | |
3815 | { | |
3816 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
3817 | 0, 0, 0, 0, // Replaced with size of .glink. | |
3818 | 0, // Augmentation size. | |
3819 | elfcpp::DW_CFA_advance_loc + 2, | |
3820 | elfcpp::DW_CFA_register, 65, 0, | |
3821 | elfcpp::DW_CFA_advance_loc + 4, | |
3822 | elfcpp::DW_CFA_restore_extended, 65 | |
3823 | }; | |
3824 | ||
3825 | static const unsigned char default_fde[] = | |
3826 | { | |
3827 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
3828 | 0, 0, 0, 0, // Replaced with size of stubs. | |
3829 | 0, // Augmentation size. | |
3830 | elfcpp::DW_CFA_nop, // Pad. | |
3831 | elfcpp::DW_CFA_nop, | |
3832 | elfcpp::DW_CFA_nop | |
3833 | }; | |
3834 | ||
9e69ed50 AM |
3835 | template<bool big_endian> |
3836 | static inline void | |
3837 | write_insn(unsigned char* p, uint32_t v) | |
3838 | { | |
3839 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
3840 | } | |
3841 | ||
ec661b9d AM |
3842 | // Stub_table holds information about plt and long branch stubs. |
3843 | // Stubs are built in an area following some input section determined | |
3844 | // by group_sections(). This input section is converted to a relaxed | |
3845 | // input section allowing it to be resized to accommodate the stubs | |
3846 | ||
3847 | template<int size, bool big_endian> | |
3848 | class Stub_table : public Output_relaxed_input_section | |
3849 | { | |
3850 | public: | |
3851 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3852 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
3853 | ||
a3e60ddb AM |
3854 | Stub_table(Target_powerpc<size, big_endian>* targ, |
3855 | Output_section* output_section, | |
3856 | const Output_section::Input_section* owner) | |
3857 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), | |
3858 | owner->relobj() | |
3859 | ->section_addralign(owner->shndx())), | |
ec661b9d | 3860 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
3861 | orig_data_size_(owner->current_data_size()), |
3862 | plt_size_(0), last_plt_size_(0), | |
6395d38b HS |
3863 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
3864 | eh_frame_added_(false), need_save_res_(false) | |
a3e60ddb AM |
3865 | { |
3866 | this->set_output_section(output_section); | |
ec661b9d | 3867 | |
a3e60ddb AM |
3868 | std::vector<Output_relaxed_input_section*> new_relaxed; |
3869 | new_relaxed.push_back(this); | |
3870 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
3871 | } | |
ec661b9d AM |
3872 | |
3873 | // Add a plt call stub. | |
a3e60ddb AM |
3874 | bool |
3875 | add_plt_call_entry(Address, | |
3876 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
3877 | const Symbol*, |
3878 | unsigned int, | |
3879 | Address); | |
3880 | ||
a3e60ddb AM |
3881 | bool |
3882 | add_plt_call_entry(Address, | |
3883 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
3884 | unsigned int, |
3885 | unsigned int, | |
3886 | Address); | |
3887 | ||
3888 | // Find a given plt call stub. | |
3889 | Address | |
3890 | find_plt_call_entry(const Symbol*) const; | |
3891 | ||
3892 | Address | |
3893 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3894 | unsigned int) const; | |
3895 | ||
3896 | Address | |
3897 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3898 | const Symbol*, | |
3899 | unsigned int, | |
3900 | Address) const; | |
3901 | ||
3902 | Address | |
3903 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, | |
3904 | unsigned int, | |
3905 | unsigned int, | |
3906 | Address) const; | |
3907 | ||
3908 | // Add a long branch stub. | |
a3e60ddb AM |
3909 | bool |
3910 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 3911 | unsigned int, Address, Address, bool); |
ec661b9d AM |
3912 | |
3913 | Address | |
9d5781f8 AM |
3914 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
3915 | Address) const; | |
ec661b9d | 3916 | |
a3e60ddb AM |
3917 | bool |
3918 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
3919 | { | |
cbcb23fa | 3920 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
3921 | if (max_branch_offset == 0) |
3922 | return true; | |
3923 | gold_assert(from != invalid_address); | |
3924 | Address loc = off + this->stub_address(); | |
3925 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
3926 | } | |
3927 | ||
ec661b9d | 3928 | void |
a3e60ddb | 3929 | clear_stubs(bool all) |
cf43a2fe | 3930 | { |
9e69ed50 AM |
3931 | this->plt_call_stubs_.clear(); |
3932 | this->plt_size_ = 0; | |
ec661b9d AM |
3933 | this->long_branch_stubs_.clear(); |
3934 | this->branch_size_ = 0; | |
d49044c7 | 3935 | this->need_save_res_ = false; |
a3e60ddb AM |
3936 | if (all) |
3937 | { | |
3938 | this->last_plt_size_ = 0; | |
3939 | this->last_branch_size_ = 0; | |
3940 | } | |
cf43a2fe AM |
3941 | } |
3942 | ||
ec661b9d AM |
3943 | Address |
3944 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 3945 | { |
ec661b9d AM |
3946 | Address start_off = off; |
3947 | off += this->orig_data_size_; | |
3948 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
3949 | if (this->need_save_res_) |
3950 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
3951 | if (my_size != 0) |
3952 | off = align_address(off, this->stub_align()); | |
3953 | // Include original section size and alignment padding in size | |
3954 | my_size += off - start_off; | |
6395d38b HS |
3955 | // Ensure new size is always larger than min size |
3956 | // threshold. Alignment requirement is included in "my_size", so | |
3957 | // increase "my_size" does not invalidate alignment. | |
3958 | if (my_size < this->min_size_threshold_) | |
3959 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
3960 | this->reset_address_and_file_offset(); |
3961 | this->set_current_data_size(my_size); | |
3962 | this->set_address_and_file_offset(os->address() + start_off, | |
3963 | os->offset() + start_off); | |
3964 | return my_size; | |
cf43a2fe AM |
3965 | } |
3966 | ||
ec661b9d | 3967 | Address |
9d5781f8 | 3968 | stub_address() const |
ec661b9d AM |
3969 | { |
3970 | return align_address(this->address() + this->orig_data_size_, | |
3971 | this->stub_align()); | |
3972 | } | |
3973 | ||
3974 | Address | |
9d5781f8 | 3975 | stub_offset() const |
ec661b9d AM |
3976 | { |
3977 | return align_address(this->offset() + this->orig_data_size_, | |
3978 | this->stub_align()); | |
3979 | } | |
3980 | ||
3981 | section_size_type | |
3982 | plt_size() const | |
3983 | { return this->plt_size_; } | |
3984 | ||
6395d38b HS |
3985 | void set_min_size_threshold(Address min_size) |
3986 | { this->min_size_threshold_ = min_size; } | |
3987 | ||
ec661b9d AM |
3988 | bool |
3989 | size_update() | |
3990 | { | |
3991 | Output_section* os = this->output_section(); | |
3992 | if (os->addralign() < this->stub_align()) | |
3993 | { | |
3994 | os->set_addralign(this->stub_align()); | |
3995 | // FIXME: get rid of the insane checkpointing. | |
3996 | // We can't increase alignment of the input section to which | |
3997 | // stubs are attached; The input section may be .init which | |
3998 | // is pasted together with other .init sections to form a | |
3999 | // function. Aligning might insert zero padding resulting in | |
4000 | // sigill. However we do need to increase alignment of the | |
4001 | // output section so that the align_address() on offset in | |
4002 | // set_address_and_size() adds the same padding as the | |
4003 | // align_address() on address in stub_address(). | |
4004 | // What's more, we need this alignment for the layout done in | |
4005 | // relaxation_loop_body() so that the output section starts at | |
4006 | // a suitably aligned address. | |
4007 | os->checkpoint_set_addralign(this->stub_align()); | |
4008 | } | |
9e69ed50 AM |
4009 | if (this->last_plt_size_ != this->plt_size_ |
4010 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4011 | { |
9e69ed50 AM |
4012 | this->last_plt_size_ = this->plt_size_; |
4013 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4014 | return true; |
4015 | } | |
4016 | return false; | |
4017 | } | |
4018 | ||
9d5781f8 AM |
4019 | // Add .eh_frame info for this stub section. Unlike other linker |
4020 | // generated .eh_frame this is added late in the link, because we | |
4021 | // only want the .eh_frame info if this particular stub section is | |
4022 | // non-empty. | |
4023 | void | |
4024 | add_eh_frame(Layout* layout) | |
4025 | { | |
4026 | if (!this->eh_frame_added_) | |
4027 | { | |
4028 | if (!parameters->options().ld_generated_unwind_info()) | |
4029 | return; | |
4030 | ||
4031 | // Since we add stub .eh_frame info late, it must be placed | |
4032 | // after all other linker generated .eh_frame info so that | |
4033 | // merge mapping need not be updated for input sections. | |
4034 | // There is no provision to use a different CIE to that used | |
4035 | // by .glink. | |
4036 | if (!this->targ_->has_glink()) | |
4037 | return; | |
4038 | ||
4039 | layout->add_eh_frame_for_plt(this, | |
4040 | Eh_cie<size>::eh_frame_cie, | |
4041 | sizeof (Eh_cie<size>::eh_frame_cie), | |
4042 | default_fde, | |
4043 | sizeof (default_fde)); | |
4044 | this->eh_frame_added_ = true; | |
4045 | } | |
4046 | } | |
4047 | ||
ec661b9d AM |
4048 | Target_powerpc<size, big_endian>* |
4049 | targ() const | |
4050 | { return targ_; } | |
6ce78956 | 4051 | |
cf43a2fe | 4052 | private: |
9e69ed50 AM |
4053 | class Plt_stub_ent; |
4054 | class Plt_stub_ent_hash; | |
4055 | typedef Unordered_map<Plt_stub_ent, unsigned int, | |
4056 | Plt_stub_ent_hash> Plt_stub_entries; | |
4057 | ||
4058 | // Alignment of stub section. | |
ec661b9d | 4059 | unsigned int |
9e69ed50 AM |
4060 | stub_align() const |
4061 | { | |
4062 | if (size == 32) | |
4063 | return 16; | |
4064 | unsigned int min_align = 32; | |
4065 | unsigned int user_align = 1 << parameters->options().plt_align(); | |
4066 | return std::max(user_align, min_align); | |
4067 | } | |
cf43a2fe | 4068 | |
91c2b899 AM |
4069 | // Return the plt offset for the given call stub. |
4070 | Address | |
4071 | plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const | |
4072 | { | |
4073 | const Symbol* gsym = p->first.sym_; | |
4074 | if (gsym != NULL) | |
4075 | { | |
4076 | *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4077 | && gsym->can_use_relative_reloc(false)); | |
4078 | return gsym->plt_offset(); | |
4079 | } | |
4080 | else | |
4081 | { | |
4082 | *is_iplt = true; | |
4083 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; | |
4084 | unsigned int local_sym_index = p->first.locsym_; | |
4085 | return relobj->local_plt_offset(local_sym_index); | |
4086 | } | |
4087 | } | |
4088 | ||
9e69ed50 | 4089 | // Size of a given plt call stub. |
ec661b9d | 4090 | unsigned int |
9e69ed50 AM |
4091 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4092 | { | |
4093 | if (size == 32) | |
4094 | return 16; | |
4095 | ||
91c2b899 AM |
4096 | bool is_iplt; |
4097 | Address plt_addr = this->plt_off(p, &is_iplt); | |
4098 | if (is_iplt) | |
4099 | plt_addr += this->targ_->iplt_section()->address(); | |
9e69ed50 | 4100 | else |
91c2b899 AM |
4101 | plt_addr += this->targ_->plt_section()->address(); |
4102 | Address got_addr = this->targ_->got_section()->output_section()->address(); | |
9e69ed50 AM |
4103 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4104 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4105 | got_addr += ppcobj->toc_base_offset(); |
4106 | Address off = plt_addr - got_addr; | |
b4f7960d AM |
4107 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
4108 | if (this->targ_->abiversion() < 2) | |
4109 | { | |
4110 | bool static_chain = parameters->options().plt_static_chain(); | |
4111 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4112 | bytes += (4 | |
4113 | + 4 * static_chain | |
4114 | + 8 * thread_safe | |
4115 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4116 | } | |
9e69ed50 AM |
4117 | unsigned int align = 1 << parameters->options().plt_align(); |
4118 | if (align > 1) | |
4119 | bytes = (bytes + align - 1) & -align; | |
4120 | return bytes; | |
4121 | } | |
ec661b9d AM |
4122 | |
4123 | // Return long branch stub size. | |
4124 | unsigned int | |
4125 | branch_stub_size(Address to) | |
4126 | { | |
9e69ed50 AM |
4127 | Address loc |
4128 | = this->stub_address() + this->last_plt_size_ + this->branch_size_; | |
4129 | if (to - loc + (1 << 25) < 2 << 25) | |
ec661b9d AM |
4130 | return 4; |
4131 | if (size == 64 || !parameters->options().output_is_position_independent()) | |
4132 | return 16; | |
4133 | return 32; | |
4134 | } | |
4135 | ||
4136 | // Write out stubs. | |
cf43a2fe AM |
4137 | void |
4138 | do_write(Output_file*); | |
4139 | ||
ec661b9d AM |
4140 | // Plt call stub keys. |
4141 | class Plt_stub_ent | |
cf43a2fe | 4142 | { |
d1a8cabd | 4143 | public: |
ec661b9d | 4144 | Plt_stub_ent(const Symbol* sym) |
c9824451 AM |
4145 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4146 | { } | |
4147 | ||
ec661b9d AM |
4148 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
4149 | unsigned int locsym_index) | |
c9824451 AM |
4150 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4151 | { } | |
4152 | ||
ec661b9d AM |
4153 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
4154 | const Symbol* sym, | |
4155 | unsigned int r_type, | |
4156 | Address addend) | |
e5d5f5ed | 4157 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4158 | { |
4159 | if (size != 32) | |
ec661b9d | 4160 | this->addend_ = addend; |
d1a8cabd | 4161 | else if (parameters->options().output_is_position_independent() |
ec661b9d | 4162 | && r_type == elfcpp::R_PPC_PLTREL24) |
cf43a2fe | 4163 | { |
ec661b9d | 4164 | this->addend_ = addend; |
e5d5f5ed | 4165 | if (this->addend_ >= 32768) |
d1a8cabd | 4166 | this->object_ = object; |
cf43a2fe AM |
4167 | } |
4168 | } | |
4169 | ||
ec661b9d AM |
4170 | Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object, |
4171 | unsigned int locsym_index, | |
4172 | unsigned int r_type, | |
4173 | Address addend) | |
e5d5f5ed AM |
4174 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4175 | { | |
4176 | if (size != 32) | |
ec661b9d | 4177 | this->addend_ = addend; |
e5d5f5ed | 4178 | else if (parameters->options().output_is_position_independent() |
ec661b9d AM |
4179 | && r_type == elfcpp::R_PPC_PLTREL24) |
4180 | this->addend_ = addend; | |
e5d5f5ed AM |
4181 | } |
4182 | ||
ec661b9d | 4183 | bool operator==(const Plt_stub_ent& that) const |
cf43a2fe AM |
4184 | { |
4185 | return (this->sym_ == that.sym_ | |
4186 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4187 | && this->addend_ == that.addend_ |
4188 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4189 | } |
c9269dff AM |
4190 | |
4191 | const Symbol* sym_; | |
e5d5f5ed AM |
4192 | const Sized_relobj_file<size, big_endian>* object_; |
4193 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4194 | unsigned int locsym_; | |
cf43a2fe AM |
4195 | }; |
4196 | ||
ec661b9d | 4197 | class Plt_stub_ent_hash |
cf43a2fe | 4198 | { |
d1a8cabd | 4199 | public: |
ec661b9d | 4200 | size_t operator()(const Plt_stub_ent& ent) const |
cf43a2fe AM |
4201 | { |
4202 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4203 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4204 | ^ ent.addend_ |
4205 | ^ ent.locsym_); | |
cf43a2fe | 4206 | } |
ec661b9d AM |
4207 | }; |
4208 | ||
4209 | // Long branch stub keys. | |
4210 | class Branch_stub_ent | |
4211 | { | |
4212 | public: | |
d49044c7 AM |
4213 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4214 | Address to, bool save_res) | |
4215 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4216 | { |
4217 | if (size == 64) | |
4218 | toc_base_off_ = obj->toc_base_offset(); | |
4219 | } | |
4220 | ||
4221 | bool operator==(const Branch_stub_ent& that) const | |
4222 | { | |
4223 | return (this->dest_ == that.dest_ | |
4224 | && (size == 32 | |
4225 | || this->toc_base_off_ == that.toc_base_off_)); | |
4226 | } | |
cf43a2fe | 4227 | |
ec661b9d AM |
4228 | Address dest_; |
4229 | unsigned int toc_base_off_; | |
d49044c7 | 4230 | bool save_res_; |
ec661b9d | 4231 | }; |
cf43a2fe | 4232 | |
ec661b9d AM |
4233 | class Branch_stub_ent_hash |
4234 | { | |
4235 | public: | |
4236 | size_t operator()(const Branch_stub_ent& ent) const | |
4237 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4238 | }; | |
cf43a2fe | 4239 | |
ec661b9d | 4240 | // In a sane world this would be a global. |
cf43a2fe | 4241 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4242 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4243 | Plt_stub_entries plt_call_stubs_; |
4244 | // Map destination address to stub offset. | |
4245 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4246 | Branch_stub_ent_hash> Branch_stub_entries; | |
4247 | Branch_stub_entries long_branch_stubs_; | |
4248 | // size of input section | |
4249 | section_size_type orig_data_size_; | |
4250 | // size of stubs | |
9e69ed50 | 4251 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4252 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4253 | // size, which leads to an endless relax loop. This is to be fixed | |
4254 | // by, after the first few iterations, allowing only increase of | |
4255 | // stub table size. This variable sets the minimal possible size of | |
4256 | // a stub table, it is zero for the first few iterations, then | |
4257 | // increases monotonically. | |
4258 | Address min_size_threshold_; | |
9d5781f8 AM |
4259 | // Whether .eh_frame info has been created for this stub section. |
4260 | bool eh_frame_added_; | |
d49044c7 AM |
4261 | // Set if this stub group needs a copy of out-of-line register |
4262 | // save/restore functions. | |
4263 | bool need_save_res_; | |
cf43a2fe AM |
4264 | }; |
4265 | ||
ec661b9d | 4266 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4267 | // sym/object/addend combo. |
cf43a2fe AM |
4268 | |
4269 | template<int size, bool big_endian> | |
a3e60ddb | 4270 | bool |
ec661b9d | 4271 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4272 | Address from, |
c9824451 | 4273 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4274 | const Symbol* gsym, |
ec661b9d AM |
4275 | unsigned int r_type, |
4276 | Address addend) | |
cf43a2fe | 4277 | { |
ec661b9d | 4278 | Plt_stub_ent ent(object, gsym, r_type, addend); |
9055360d | 4279 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
4280 | std::pair<typename Plt_stub_entries::iterator, bool> p |
4281 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
4282 | if (p.second) | |
4283 | this->plt_size_ = off + this->plt_call_size(p.first); | |
a3e60ddb | 4284 | return this->can_reach_stub(from, off, r_type); |
cf43a2fe AM |
4285 | } |
4286 | ||
e5d5f5ed | 4287 | template<int size, bool big_endian> |
a3e60ddb | 4288 | bool |
ec661b9d | 4289 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4290 | Address from, |
c9824451 | 4291 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4292 | unsigned int locsym_index, |
ec661b9d AM |
4293 | unsigned int r_type, |
4294 | Address addend) | |
e5d5f5ed | 4295 | { |
ec661b9d | 4296 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
9055360d | 4297 | unsigned int off = this->plt_size_; |
9e69ed50 AM |
4298 | std::pair<typename Plt_stub_entries::iterator, bool> p |
4299 | = this->plt_call_stubs_.insert(std::make_pair(ent, off)); | |
4300 | if (p.second) | |
4301 | this->plt_size_ = off + this->plt_call_size(p.first); | |
a3e60ddb | 4302 | return this->can_reach_stub(from, off, r_type); |
e5d5f5ed AM |
4303 | } |
4304 | ||
ec661b9d AM |
4305 | // Find a plt call stub. |
4306 | ||
cf43a2fe | 4307 | template<int size, bool big_endian> |
ec5b8187 | 4308 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4309 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4310 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4311 | const Symbol* gsym, |
ec661b9d AM |
4312 | unsigned int r_type, |
4313 | Address addend) const | |
c9824451 | 4314 | { |
ec661b9d AM |
4315 | Plt_stub_ent ent(object, gsym, r_type, addend); |
4316 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4317 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
4318 | } |
4319 | ||
4320 | template<int size, bool big_endian> | |
ec5b8187 | 4321 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4322 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4323 | { |
ec661b9d AM |
4324 | Plt_stub_ent ent(gsym); |
4325 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4326 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
cf43a2fe AM |
4327 | } |
4328 | ||
e5d5f5ed | 4329 | template<int size, bool big_endian> |
ec5b8187 | 4330 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4331 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4332 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4333 | unsigned int locsym_index, |
ec661b9d AM |
4334 | unsigned int r_type, |
4335 | Address addend) const | |
e5d5f5ed | 4336 | { |
ec661b9d AM |
4337 | Plt_stub_ent ent(object, locsym_index, r_type, addend); |
4338 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4339 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
c9824451 AM |
4340 | } |
4341 | ||
4342 | template<int size, bool big_endian> | |
ec5b8187 | 4343 | typename Stub_table<size, big_endian>::Address |
ec661b9d | 4344 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4345 | const Sized_relobj_file<size, big_endian>* object, |
4346 | unsigned int locsym_index) const | |
4347 | { | |
ec661b9d AM |
4348 | Plt_stub_ent ent(object, locsym_index); |
4349 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent); | |
4350 | return p == this->plt_call_stubs_.end() ? invalid_address : p->second; | |
4351 | } | |
4352 | ||
4353 | // Add a long branch stub if we don't already have one to given | |
4354 | // destination. | |
4355 | ||
4356 | template<int size, bool big_endian> | |
a3e60ddb | 4357 | bool |
ec661b9d AM |
4358 | Stub_table<size, big_endian>::add_long_branch_entry( |
4359 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
4360 | unsigned int r_type, |
4361 | Address from, | |
d49044c7 AM |
4362 | Address to, |
4363 | bool save_res) | |
ec661b9d | 4364 | { |
d49044c7 | 4365 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d AM |
4366 | Address off = this->branch_size_; |
4367 | if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second) | |
4368 | { | |
d49044c7 AM |
4369 | if (save_res) |
4370 | this->need_save_res_ = true; | |
4371 | else | |
4372 | { | |
4373 | unsigned int stub_size = this->branch_stub_size(to); | |
4374 | this->branch_size_ = off + stub_size; | |
4375 | if (size == 64 && stub_size != 4) | |
4376 | this->targ_->add_branch_lookup_table(to); | |
4377 | } | |
ec661b9d | 4378 | } |
a3e60ddb | 4379 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
4380 | } |
4381 | ||
d49044c7 | 4382 | // Find long branch stub offset. |
ec661b9d AM |
4383 | |
4384 | template<int size, bool big_endian> | |
ec5b8187 | 4385 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
4386 | Stub_table<size, big_endian>::find_long_branch_entry( |
4387 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 4388 | Address to) const |
ec661b9d | 4389 | { |
d49044c7 | 4390 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
4391 | typename Branch_stub_entries::const_iterator p |
4392 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
4393 | if (p == this->long_branch_stubs_.end()) |
4394 | return invalid_address; | |
4395 | if (p->first.save_res_) | |
4396 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
4397 | return p->second; | |
e5d5f5ed AM |
4398 | } |
4399 | ||
ec661b9d AM |
4400 | // A class to handle .glink. |
4401 | ||
4402 | template<int size, bool big_endian> | |
4403 | class Output_data_glink : public Output_section_data | |
4404 | { | |
4405 | public: | |
9055360d AM |
4406 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4407 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
4408 | static const int pltresolve_size = 16*4; |
4409 | ||
4410 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
4411 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
4412 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
4413 | { } |
4414 | ||
9d5781f8 | 4415 | void |
9055360d | 4416 | add_eh_frame(Layout* layout); |
9d5781f8 | 4417 | |
9055360d AM |
4418 | void |
4419 | add_global_entry(const Symbol*); | |
4420 | ||
4421 | Address | |
4422 | find_global_entry(const Symbol*) const; | |
4423 | ||
4424 | Address | |
4425 | global_entry_address() const | |
4426 | { | |
4427 | gold_assert(this->is_data_size_valid()); | |
4428 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4429 | return this->address() + global_entry_off; | |
9d5781f8 AM |
4430 | } |
4431 | ||
ec661b9d AM |
4432 | protected: |
4433 | // Write to a map file. | |
4434 | void | |
4435 | do_print_to_mapfile(Mapfile* mapfile) const | |
4436 | { mapfile->print_output_data(this, _("** glink")); } | |
4437 | ||
4438 | private: | |
4439 | void | |
4440 | set_final_data_size(); | |
4441 | ||
4442 | // Write out .glink | |
4443 | void | |
4444 | do_write(Output_file*); | |
4445 | ||
4446 | // Allows access to .got and .plt for do_write. | |
4447 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
4448 | |
4449 | // Map sym to stub offset. | |
4450 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
4451 | Global_entry_stub_entries global_entry_stubs_; | |
4452 | ||
4453 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
4454 | }; |
4455 | ||
9055360d AM |
4456 | template<int size, bool big_endian> |
4457 | void | |
4458 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
4459 | { | |
4460 | if (!parameters->options().ld_generated_unwind_info()) | |
4461 | return; | |
4462 | ||
4463 | if (size == 64) | |
4464 | { | |
4465 | if (this->targ_->abiversion() < 2) | |
4466 | layout->add_eh_frame_for_plt(this, | |
4467 | Eh_cie<64>::eh_frame_cie, | |
4468 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4469 | glink_eh_frame_fde_64v1, | |
4470 | sizeof (glink_eh_frame_fde_64v1)); | |
4471 | else | |
4472 | layout->add_eh_frame_for_plt(this, | |
4473 | Eh_cie<64>::eh_frame_cie, | |
4474 | sizeof (Eh_cie<64>::eh_frame_cie), | |
4475 | glink_eh_frame_fde_64v2, | |
4476 | sizeof (glink_eh_frame_fde_64v2)); | |
4477 | } | |
4478 | else | |
4479 | { | |
4480 | // 32-bit .glink can use the default since the CIE return | |
4481 | // address reg, LR, is valid. | |
4482 | layout->add_eh_frame_for_plt(this, | |
4483 | Eh_cie<32>::eh_frame_cie, | |
4484 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4485 | default_fde, | |
4486 | sizeof (default_fde)); | |
4487 | // Except where LR is used in a PIC __glink_PLTresolve. | |
4488 | if (parameters->options().output_is_position_independent()) | |
4489 | layout->add_eh_frame_for_plt(this, | |
4490 | Eh_cie<32>::eh_frame_cie, | |
4491 | sizeof (Eh_cie<32>::eh_frame_cie), | |
4492 | glink_eh_frame_fde_32, | |
4493 | sizeof (glink_eh_frame_fde_32)); | |
4494 | } | |
4495 | } | |
4496 | ||
4497 | template<int size, bool big_endian> | |
4498 | void | |
4499 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
4500 | { | |
4501 | std::pair<typename Global_entry_stub_entries::iterator, bool> p | |
4502 | = this->global_entry_stubs_.insert(std::make_pair(gsym, this->ge_size_)); | |
4503 | if (p.second) | |
4504 | this->ge_size_ += 16; | |
4505 | } | |
4506 | ||
4507 | template<int size, bool big_endian> | |
4508 | typename Output_data_glink<size, big_endian>::Address | |
4509 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
4510 | { | |
4511 | typename Global_entry_stub_entries::const_iterator p | |
4512 | = this->global_entry_stubs_.find(gsym); | |
4513 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
4514 | } | |
4515 | ||
cf43a2fe AM |
4516 | template<int size, bool big_endian> |
4517 | void | |
4518 | Output_data_glink<size, big_endian>::set_final_data_size() | |
4519 | { | |
ec661b9d AM |
4520 | unsigned int count = this->targ_->plt_entry_count(); |
4521 | section_size_type total = 0; | |
cf43a2fe AM |
4522 | |
4523 | if (count != 0) | |
4524 | { | |
4525 | if (size == 32) | |
4526 | { | |
cf43a2fe AM |
4527 | // space for branch table |
4528 | total += 4 * (count - 1); | |
4529 | ||
4530 | total += -total & 15; | |
4531 | total += this->pltresolve_size; | |
4532 | } | |
4533 | else | |
4534 | { | |
cf43a2fe AM |
4535 | total += this->pltresolve_size; |
4536 | ||
4537 | // space for branch table | |
b4f7960d AM |
4538 | total += 4 * count; |
4539 | if (this->targ_->abiversion() < 2) | |
4540 | { | |
4541 | total += 4 * count; | |
4542 | if (count > 0x8000) | |
4543 | total += 4 * (count - 0x8000); | |
4544 | } | |
cf43a2fe AM |
4545 | } |
4546 | } | |
9055360d AM |
4547 | this->end_branch_table_ = total; |
4548 | total = (total + 15) & -16; | |
4549 | total += this->ge_size_; | |
cf43a2fe AM |
4550 | |
4551 | this->set_data_size(total); | |
4552 | } | |
4553 | ||
ec661b9d | 4554 | // Write out plt and long branch stub code. |
cf43a2fe AM |
4555 | |
4556 | template<int size, bool big_endian> | |
4557 | void | |
ec661b9d | 4558 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 4559 | { |
ec661b9d AM |
4560 | if (this->plt_call_stubs_.empty() |
4561 | && this->long_branch_stubs_.empty()) | |
4562 | return; | |
4563 | ||
4564 | const section_size_type start_off = this->offset(); | |
4565 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 4566 | const section_size_type oview_size = |
ec661b9d | 4567 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 4568 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 4569 | unsigned char* p; |
42cacb20 | 4570 | |
cf43a2fe AM |
4571 | if (size == 64) |
4572 | { | |
ec661b9d AM |
4573 | const Output_data_got_powerpc<size, big_endian>* got |
4574 | = this->targ_->got_section(); | |
dd93cd0a | 4575 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 4576 | |
ec661b9d | 4577 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 4578 | { |
ec661b9d AM |
4579 | // The base address of the .plt section. |
4580 | Address plt_base = this->targ_->plt_section()->address(); | |
4581 | Address iplt_base = invalid_address; | |
4582 | ||
4583 | // Write out plt call stubs. | |
4584 | typename Plt_stub_entries::const_iterator cs; | |
4585 | for (cs = this->plt_call_stubs_.begin(); | |
4586 | cs != this->plt_call_stubs_.end(); | |
4587 | ++cs) | |
e5d5f5ed | 4588 | { |
91c2b899 AM |
4589 | bool is_iplt; |
4590 | Address pltoff = this->plt_off(cs, &is_iplt); | |
9e69ed50 | 4591 | Address plt_addr = pltoff; |
91c2b899 | 4592 | if (is_iplt) |
ec661b9d AM |
4593 | { |
4594 | if (iplt_base == invalid_address) | |
4595 | iplt_base = this->targ_->iplt_section()->address(); | |
4596 | plt_addr += iplt_base; | |
4597 | } | |
4598 | else | |
4599 | plt_addr += plt_base; | |
4600 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
4601 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
4602 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 4603 | Address off = plt_addr - got_addr; |
ec661b9d | 4604 | |
9e69ed50 | 4605 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
4606 | gold_error(_("%s: linkage table error against `%s'"), |
4607 | cs->first.object_->name().c_str(), | |
4608 | cs->first.sym_->demangled_name().c_str()); | |
4609 | ||
b4f7960d AM |
4610 | bool plt_load_toc = this->targ_->abiversion() < 2; |
4611 | bool static_chain | |
4612 | = plt_load_toc && parameters->options().plt_static_chain(); | |
4613 | bool thread_safe | |
4614 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
4615 | bool use_fake_dep = false; |
4616 | Address cmp_branch_off = 0; | |
4617 | if (thread_safe) | |
4618 | { | |
4619 | unsigned int pltindex | |
4620 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
4621 | / this->targ_->plt_entry_size()); | |
4622 | Address glinkoff | |
4623 | = (this->targ_->glink_section()->pltresolve_size | |
4624 | + pltindex * 8); | |
4625 | if (pltindex > 32768) | |
4626 | glinkoff += (pltindex - 32768) * 4; | |
4627 | Address to | |
4628 | = this->targ_->glink_section()->address() + glinkoff; | |
4629 | Address from | |
4630 | = (this->stub_address() + cs->second + 24 | |
4631 | + 4 * (ha(off) != 0) | |
4632 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
4633 | + 4 * static_chain); | |
4634 | cmp_branch_off = to - from; | |
4635 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
4636 | } | |
4637 | ||
ec661b9d | 4638 | p = oview + cs->second; |
9e69ed50 | 4639 | if (ha(off) != 0) |
ec661b9d | 4640 | { |
b4f7960d AM |
4641 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4642 | p += 4; | |
397998fc AM |
4643 | if (plt_load_toc) |
4644 | { | |
4645 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
4646 | p += 4; | |
4647 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
4648 | p += 4; | |
4649 | } | |
4650 | else | |
4651 | { | |
4652 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
4653 | p += 4; | |
4654 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
4655 | p += 4; | |
4656 | } | |
b4f7960d AM |
4657 | if (plt_load_toc |
4658 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4659 | { |
b4f7960d AM |
4660 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
4661 | p += 4; | |
9e69ed50 | 4662 | off = 0; |
ec661b9d | 4663 | } |
b4f7960d AM |
4664 | write_insn<big_endian>(p, mtctr_12); |
4665 | p += 4; | |
4666 | if (plt_load_toc) | |
9e69ed50 | 4667 | { |
b4f7960d AM |
4668 | if (use_fake_dep) |
4669 | { | |
4670 | write_insn<big_endian>(p, xor_2_12_12); | |
4671 | p += 4; | |
4672 | write_insn<big_endian>(p, add_11_11_2); | |
4673 | p += 4; | |
4674 | } | |
4675 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
4676 | p += 4; | |
4677 | if (static_chain) | |
4678 | { | |
4679 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
4680 | p += 4; | |
4681 | } | |
9e69ed50 | 4682 | } |
ec661b9d AM |
4683 | } |
4684 | else | |
4685 | { | |
b4f7960d AM |
4686 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
4687 | p += 4; | |
4688 | write_insn<big_endian>(p, ld_12_2 + l(off)); | |
4689 | p += 4; | |
4690 | if (plt_load_toc | |
4691 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 4692 | { |
b4f7960d AM |
4693 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
4694 | p += 4; | |
9e69ed50 | 4695 | off = 0; |
ec661b9d | 4696 | } |
b4f7960d AM |
4697 | write_insn<big_endian>(p, mtctr_12); |
4698 | p += 4; | |
4699 | if (plt_load_toc) | |
9e69ed50 | 4700 | { |
b4f7960d AM |
4701 | if (use_fake_dep) |
4702 | { | |
4703 | write_insn<big_endian>(p, xor_11_12_12); | |
4704 | p += 4; | |
4705 | write_insn<big_endian>(p, add_2_2_11); | |
4706 | p += 4; | |
4707 | } | |
4708 | if (static_chain) | |
4709 | { | |
4710 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
4711 | p += 4; | |
4712 | } | |
4713 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
4714 | p += 4; | |
9e69ed50 | 4715 | } |
ec661b9d | 4716 | } |
9e69ed50 AM |
4717 | if (thread_safe && !use_fake_dep) |
4718 | { | |
b4f7960d AM |
4719 | write_insn<big_endian>(p, cmpldi_2_0); |
4720 | p += 4; | |
4721 | write_insn<big_endian>(p, bnectr_p4); | |
4722 | p += 4; | |
9e69ed50 AM |
4723 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
4724 | } | |
4725 | else | |
4726 | write_insn<big_endian>(p, bctr); | |
e5d5f5ed | 4727 | } |
ec661b9d AM |
4728 | } |
4729 | ||
4730 | // Write out long branch stubs. | |
4731 | typename Branch_stub_entries::const_iterator bs; | |
4732 | for (bs = this->long_branch_stubs_.begin(); | |
4733 | bs != this->long_branch_stubs_.end(); | |
4734 | ++bs) | |
4735 | { | |
d49044c7 AM |
4736 | if (bs->first.save_res_) |
4737 | continue; | |
ec661b9d AM |
4738 | p = oview + this->plt_size_ + bs->second; |
4739 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4740 | Address delta = bs->first.dest_ - loc; | |
4741 | if (delta + (1 << 25) < 2 << 25) | |
4742 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 4743 | else |
cf43a2fe | 4744 | { |
ec661b9d AM |
4745 | Address brlt_addr |
4746 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
4747 | gold_assert(brlt_addr != invalid_address); | |
4748 | brlt_addr += this->targ_->brlt_section()->address(); | |
4749 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
4750 | Address brltoff = brlt_addr - got_addr; | |
4751 | if (ha(brltoff) == 0) | |
4752 | { | |
b4f7960d | 4753 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
4754 | } |
4755 | else | |
cf43a2fe | 4756 | { |
397998fc AM |
4757 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
4758 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 4759 | } |
b4f7960d | 4760 | write_insn<big_endian>(p, mtctr_12), p += 4; |
ec661b9d | 4761 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 4762 | } |
ec661b9d AM |
4763 | } |
4764 | } | |
4765 | else | |
4766 | { | |
4767 | if (!this->plt_call_stubs_.empty()) | |
4768 | { | |
4769 | // The base address of the .plt section. | |
4770 | Address plt_base = this->targ_->plt_section()->address(); | |
4771 | Address iplt_base = invalid_address; | |
4772 | // The address of _GLOBAL_OFFSET_TABLE_. | |
4773 | Address g_o_t = invalid_address; | |
4774 | ||
4775 | // Write out plt call stubs. | |
4776 | typename Plt_stub_entries::const_iterator cs; | |
4777 | for (cs = this->plt_call_stubs_.begin(); | |
4778 | cs != this->plt_call_stubs_.end(); | |
4779 | ++cs) | |
cf43a2fe | 4780 | { |
91c2b899 AM |
4781 | bool is_iplt; |
4782 | Address plt_addr = this->plt_off(cs, &is_iplt); | |
4783 | if (is_iplt) | |
ec661b9d AM |
4784 | { |
4785 | if (iplt_base == invalid_address) | |
4786 | iplt_base = this->targ_->iplt_section()->address(); | |
4787 | plt_addr += iplt_base; | |
4788 | } | |
4789 | else | |
4790 | plt_addr += plt_base; | |
4791 | ||
4792 | p = oview + cs->second; | |
4793 | if (parameters->options().output_is_position_independent()) | |
4794 | { | |
4795 | Address got_addr; | |
4796 | const Powerpc_relobj<size, big_endian>* ppcobj | |
4797 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
4798 | (cs->first.object_)); | |
4799 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
4800 | { | |
4801 | unsigned int got2 = ppcobj->got2_shndx(); | |
4802 | got_addr = ppcobj->get_output_section_offset(got2); | |
4803 | gold_assert(got_addr != invalid_address); | |
4804 | got_addr += (ppcobj->output_section(got2)->address() | |
4805 | + cs->first.addend_); | |
4806 | } | |
4807 | else | |
4808 | { | |
4809 | if (g_o_t == invalid_address) | |
4810 | { | |
4811 | const Output_data_got_powerpc<size, big_endian>* got | |
4812 | = this->targ_->got_section(); | |
4813 | g_o_t = got->address() + got->g_o_t(); | |
4814 | } | |
4815 | got_addr = g_o_t; | |
4816 | } | |
4817 | ||
9e69ed50 AM |
4818 | Address off = plt_addr - got_addr; |
4819 | if (ha(off) == 0) | |
ec661b9d | 4820 | { |
9e69ed50 | 4821 | write_insn<big_endian>(p + 0, lwz_11_30 + l(off)); |
ec661b9d AM |
4822 | write_insn<big_endian>(p + 4, mtctr_11); |
4823 | write_insn<big_endian>(p + 8, bctr); | |
4824 | } | |
4825 | else | |
4826 | { | |
9e69ed50 AM |
4827 | write_insn<big_endian>(p + 0, addis_11_30 + ha(off)); |
4828 | write_insn<big_endian>(p + 4, lwz_11_11 + l(off)); | |
ec661b9d AM |
4829 | write_insn<big_endian>(p + 8, mtctr_11); |
4830 | write_insn<big_endian>(p + 12, bctr); | |
4831 | } | |
4832 | } | |
4833 | else | |
4834 | { | |
4835 | write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr)); | |
4836 | write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr)); | |
4837 | write_insn<big_endian>(p + 8, mtctr_11); | |
4838 | write_insn<big_endian>(p + 12, bctr); | |
4839 | } | |
4840 | } | |
4841 | } | |
4842 | ||
4843 | // Write out long branch stubs. | |
4844 | typename Branch_stub_entries::const_iterator bs; | |
4845 | for (bs = this->long_branch_stubs_.begin(); | |
4846 | bs != this->long_branch_stubs_.end(); | |
4847 | ++bs) | |
4848 | { | |
d49044c7 AM |
4849 | if (bs->first.save_res_) |
4850 | continue; | |
ec661b9d AM |
4851 | p = oview + this->plt_size_ + bs->second; |
4852 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
4853 | Address delta = bs->first.dest_ - loc; | |
4854 | if (delta + (1 << 25) < 2 << 25) | |
4855 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
4856 | else if (!parameters->options().output_is_position_independent()) | |
4857 | { | |
4858 | write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_)); | |
4859 | write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_)); | |
4860 | write_insn<big_endian>(p + 8, mtctr_12); | |
4861 | write_insn<big_endian>(p + 12, bctr); | |
4862 | } | |
4863 | else | |
4864 | { | |
4865 | delta -= 8; | |
4866 | write_insn<big_endian>(p + 0, mflr_0); | |
4867 | write_insn<big_endian>(p + 4, bcl_20_31); | |
4868 | write_insn<big_endian>(p + 8, mflr_12); | |
4869 | write_insn<big_endian>(p + 12, addis_12_12 + ha(delta)); | |
4870 | write_insn<big_endian>(p + 16, addi_12_12 + l(delta)); | |
4871 | write_insn<big_endian>(p + 20, mtlr_0); | |
4872 | write_insn<big_endian>(p + 24, mtctr_12); | |
4873 | write_insn<big_endian>(p + 28, bctr); | |
cf43a2fe AM |
4874 | } |
4875 | } | |
ec661b9d | 4876 | } |
d49044c7 AM |
4877 | if (this->need_save_res_) |
4878 | { | |
4879 | p = oview + this->plt_size_ + this->branch_size_; | |
4880 | memcpy (p, this->targ_->savres_section()->contents(), | |
4881 | this->targ_->savres_section()->data_size()); | |
4882 | } | |
ec661b9d AM |
4883 | } |
4884 | ||
4885 | // Write out .glink. | |
4886 | ||
4887 | template<int size, bool big_endian> | |
4888 | void | |
4889 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
4890 | { | |
4891 | const section_size_type off = this->offset(); | |
4892 | const section_size_type oview_size = | |
4893 | convert_to_section_size_type(this->data_size()); | |
4894 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
4895 | unsigned char* p; | |
4896 | ||
4897 | // The base address of the .plt section. | |
4898 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4899 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 4900 | |
ec661b9d AM |
4901 | if (size == 64) |
4902 | { | |
9055360d | 4903 | if (this->end_branch_table_ != 0) |
b4f7960d | 4904 | { |
9055360d AM |
4905 | // Write pltresolve stub. |
4906 | p = oview; | |
4907 | Address after_bcl = this->address() + 16; | |
4908 | Address pltoff = plt_base - after_bcl; | |
4909 | ||
4910 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 4911 | |
b4f7960d | 4912 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 4913 | { |
9055360d AM |
4914 | write_insn<big_endian>(p, mflr_12), p += 4; |
4915 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4916 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4917 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4918 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
4919 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4920 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4921 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
4922 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4923 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
4924 | } | |
4925 | else | |
4926 | { | |
4927 | write_insn<big_endian>(p, mflr_0), p += 4; | |
4928 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
4929 | write_insn<big_endian>(p, mflr_11), p += 4; | |
4930 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
4931 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
4932 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
4933 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
4934 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
4935 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
4936 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
4937 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4938 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
4939 | } | |
4940 | write_insn<big_endian>(p, bctr), p += 4; | |
4941 | while (p < oview + this->pltresolve_size) | |
4942 | write_insn<big_endian>(p, nop), p += 4; | |
4943 | ||
4944 | // Write lazy link call stubs. | |
4945 | uint32_t indx = 0; | |
4946 | while (p < oview + this->end_branch_table_) | |
4947 | { | |
4948 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 4949 | { |
9055360d AM |
4950 | if (indx < 0x8000) |
4951 | { | |
4952 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
4953 | } | |
4954 | else | |
4955 | { | |
bbec1a5d | 4956 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
4957 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
4958 | } | |
b4f7960d | 4959 | } |
9055360d AM |
4960 | uint32_t branch_off = 8 - (p - oview); |
4961 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
4962 | indx++; | |
cf43a2fe | 4963 | } |
9055360d AM |
4964 | } |
4965 | ||
4966 | Address plt_base = this->targ_->plt_section()->address(); | |
4967 | Address iplt_base = invalid_address; | |
4968 | unsigned int global_entry_off = (this->end_branch_table_ + 15) & -16; | |
4969 | Address global_entry_base = this->address() + global_entry_off; | |
4970 | typename Global_entry_stub_entries::const_iterator ge; | |
4971 | for (ge = this->global_entry_stubs_.begin(); | |
4972 | ge != this->global_entry_stubs_.end(); | |
4973 | ++ge) | |
4974 | { | |
4975 | p = oview + global_entry_off + ge->second; | |
4976 | Address plt_addr = ge->first->plt_offset(); | |
4977 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
4978 | && ge->first->can_use_relative_reloc(false)) | |
4979 | { | |
4980 | if (iplt_base == invalid_address) | |
4981 | iplt_base = this->targ_->iplt_section()->address(); | |
4982 | plt_addr += iplt_base; | |
4983 | } | |
4984 | else | |
4985 | plt_addr += plt_base; | |
4986 | Address my_addr = global_entry_base + ge->second; | |
4987 | Address off = plt_addr - my_addr; | |
4988 | ||
4989 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
4990 | gold_error(_("%s: linkage table error against `%s'"), | |
4991 | ge->first->object()->name().c_str(), | |
4992 | ge->first->demangled_name().c_str()); | |
4993 | ||
4994 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
4995 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
4996 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
4997 | write_insn<big_endian>(p, bctr); | |
cf43a2fe AM |
4998 | } |
4999 | } | |
5000 | else | |
5001 | { | |
ec661b9d AM |
5002 | const Output_data_got_powerpc<size, big_endian>* got |
5003 | = this->targ_->got_section(); | |
dd93cd0a AM |
5004 | // The address of _GLOBAL_OFFSET_TABLE_. |
5005 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5006 | |
cf43a2fe | 5007 | // Write out pltresolve branch table. |
ec661b9d | 5008 | p = oview; |
cf43a2fe | 5009 | unsigned int the_end = oview_size - this->pltresolve_size; |
c9269dff | 5010 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5011 | while (p < end_p - 8 * 4) |
5012 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5013 | while (p < end_p) | |
5014 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5015 | |
cf43a2fe AM |
5016 | // Write out pltresolve call stub. |
5017 | if (parameters->options().output_is_position_independent()) | |
42cacb20 | 5018 | { |
ec661b9d | 5019 | Address res0_off = 0; |
dd93cd0a AM |
5020 | Address after_bcl_off = the_end + 12; |
5021 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe AM |
5022 | |
5023 | write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0)); | |
5024 | write_insn<big_endian>(p + 4, mflr_0); | |
5025 | write_insn<big_endian>(p + 8, bcl_20_31); | |
5026 | write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0)); | |
5027 | write_insn<big_endian>(p + 16, mflr_12); | |
5028 | write_insn<big_endian>(p + 20, mtlr_0); | |
5029 | write_insn<big_endian>(p + 24, sub_11_11_12); | |
5030 | ||
dd93cd0a | 5031 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe AM |
5032 | |
5033 | write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl)); | |
5034 | if (ha(got_bcl) == ha(got_bcl + 4)) | |
5035 | { | |
5036 | write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl)); | |
5037 | write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4)); | |
5038 | } | |
5039 | else | |
5040 | { | |
5041 | write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl)); | |
5042 | write_insn<big_endian>(p + 36, lwz_12_12 + 4); | |
5043 | } | |
5044 | write_insn<big_endian>(p + 40, mtctr_0); | |
5045 | write_insn<big_endian>(p + 44, add_0_11_11); | |
5046 | write_insn<big_endian>(p + 48, add_11_0_11); | |
5047 | write_insn<big_endian>(p + 52, bctr); | |
5048 | write_insn<big_endian>(p + 56, nop); | |
5049 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5050 | } |
cf43a2fe | 5051 | else |
42cacb20 | 5052 | { |
ec661b9d | 5053 | Address res0 = this->address(); |
cf43a2fe AM |
5054 | |
5055 | write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4)); | |
5056 | write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0)); | |
5057 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5058 | write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4)); | |
5059 | else | |
5060 | write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4)); | |
5061 | write_insn<big_endian>(p + 12, addi_11_11 + l(-res0)); | |
5062 | write_insn<big_endian>(p + 16, mtctr_0); | |
5063 | write_insn<big_endian>(p + 20, add_0_11_11); | |
5064 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) | |
5065 | write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8)); | |
5066 | else | |
5067 | write_insn<big_endian>(p + 24, lwz_12_12 + 4); | |
5068 | write_insn<big_endian>(p + 28, add_11_0_11); | |
5069 | write_insn<big_endian>(p + 32, bctr); | |
5070 | write_insn<big_endian>(p + 36, nop); | |
5071 | write_insn<big_endian>(p + 40, nop); | |
5072 | write_insn<big_endian>(p + 44, nop); | |
5073 | write_insn<big_endian>(p + 48, nop); | |
5074 | write_insn<big_endian>(p + 52, nop); | |
5075 | write_insn<big_endian>(p + 56, nop); | |
5076 | write_insn<big_endian>(p + 60, nop); | |
42cacb20 | 5077 | } |
cf43a2fe | 5078 | p += 64; |
42cacb20 DE |
5079 | } |
5080 | ||
cf43a2fe AM |
5081 | of->write_output_view(off, oview_size, oview); |
5082 | } | |
5083 | ||
f3a0ed29 AM |
5084 | |
5085 | // A class to handle linker generated save/restore functions. | |
5086 | ||
5087 | template<int size, bool big_endian> | |
5088 | class Output_data_save_res : public Output_section_data_build | |
5089 | { | |
5090 | public: | |
5091 | Output_data_save_res(Symbol_table* symtab); | |
5092 | ||
d49044c7 AM |
5093 | const unsigned char* |
5094 | contents() const | |
5095 | { | |
5096 | return contents_; | |
5097 | } | |
5098 | ||
f3a0ed29 AM |
5099 | protected: |
5100 | // Write to a map file. | |
5101 | void | |
5102 | do_print_to_mapfile(Mapfile* mapfile) const | |
5103 | { mapfile->print_output_data(this, _("** save/restore")); } | |
5104 | ||
5105 | void | |
5106 | do_write(Output_file*); | |
5107 | ||
5108 | private: | |
5109 | // The maximum size of save/restore contents. | |
5110 | static const unsigned int savres_max = 218*4; | |
5111 | ||
5112 | void | |
5113 | savres_define(Symbol_table* symtab, | |
5114 | const char *name, | |
5115 | unsigned int lo, unsigned int hi, | |
5116 | unsigned char* write_ent(unsigned char*, int), | |
5117 | unsigned char* write_tail(unsigned char*, int)); | |
5118 | ||
5119 | unsigned char *contents_; | |
5120 | }; | |
5121 | ||
5122 | template<bool big_endian> | |
5123 | static unsigned char* | |
5124 | savegpr0(unsigned char* p, int r) | |
5125 | { | |
5126 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5127 | write_insn<big_endian>(p, insn); | |
5128 | return p + 4; | |
5129 | } | |
5130 | ||
5131 | template<bool big_endian> | |
5132 | static unsigned char* | |
5133 | savegpr0_tail(unsigned char* p, int r) | |
5134 | { | |
5135 | p = savegpr0<big_endian>(p, r); | |
5136 | uint32_t insn = std_0_1 + 16; | |
5137 | write_insn<big_endian>(p, insn); | |
5138 | p = p + 4; | |
5139 | write_insn<big_endian>(p, blr); | |
5140 | return p + 4; | |
5141 | } | |
5142 | ||
5143 | template<bool big_endian> | |
62fe925a | 5144 | static unsigned char* |
f3a0ed29 AM |
5145 | restgpr0(unsigned char* p, int r) |
5146 | { | |
5147 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5148 | write_insn<big_endian>(p, insn); | |
5149 | return p + 4; | |
5150 | } | |
5151 | ||
5152 | template<bool big_endian> | |
62fe925a | 5153 | static unsigned char* |
f3a0ed29 AM |
5154 | restgpr0_tail(unsigned char* p, int r) |
5155 | { | |
5156 | uint32_t insn = ld_0_1 + 16; | |
5157 | write_insn<big_endian>(p, insn); | |
5158 | p = p + 4; | |
5159 | p = restgpr0<big_endian>(p, r); | |
5160 | write_insn<big_endian>(p, mtlr_0); | |
5161 | p = p + 4; | |
5162 | if (r == 29) | |
5163 | { | |
5164 | p = restgpr0<big_endian>(p, 30); | |
5165 | p = restgpr0<big_endian>(p, 31); | |
5166 | } | |
5167 | write_insn<big_endian>(p, blr); | |
5168 | return p + 4; | |
5169 | } | |
5170 | ||
5171 | template<bool big_endian> | |
62fe925a | 5172 | static unsigned char* |
f3a0ed29 AM |
5173 | savegpr1(unsigned char* p, int r) |
5174 | { | |
5175 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5176 | write_insn<big_endian>(p, insn); | |
5177 | return p + 4; | |
5178 | } | |
5179 | ||
5180 | template<bool big_endian> | |
62fe925a | 5181 | static unsigned char* |
f3a0ed29 AM |
5182 | savegpr1_tail(unsigned char* p, int r) |
5183 | { | |
5184 | p = savegpr1<big_endian>(p, r); | |
5185 | write_insn<big_endian>(p, blr); | |
5186 | return p + 4; | |
5187 | } | |
5188 | ||
5189 | template<bool big_endian> | |
62fe925a | 5190 | static unsigned char* |
f3a0ed29 AM |
5191 | restgpr1(unsigned char* p, int r) |
5192 | { | |
5193 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5194 | write_insn<big_endian>(p, insn); | |
5195 | return p + 4; | |
5196 | } | |
5197 | ||
5198 | template<bool big_endian> | |
62fe925a | 5199 | static unsigned char* |
f3a0ed29 AM |
5200 | restgpr1_tail(unsigned char* p, int r) |
5201 | { | |
5202 | p = restgpr1<big_endian>(p, r); | |
5203 | write_insn<big_endian>(p, blr); | |
5204 | return p + 4; | |
5205 | } | |
5206 | ||
5207 | template<bool big_endian> | |
62fe925a | 5208 | static unsigned char* |
f3a0ed29 AM |
5209 | savefpr(unsigned char* p, int r) |
5210 | { | |
5211 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5212 | write_insn<big_endian>(p, insn); | |
5213 | return p + 4; | |
5214 | } | |
5215 | ||
5216 | template<bool big_endian> | |
62fe925a | 5217 | static unsigned char* |
f3a0ed29 AM |
5218 | savefpr0_tail(unsigned char* p, int r) |
5219 | { | |
5220 | p = savefpr<big_endian>(p, r); | |
5221 | write_insn<big_endian>(p, std_0_1 + 16); | |
5222 | p = p + 4; | |
5223 | write_insn<big_endian>(p, blr); | |
5224 | return p + 4; | |
5225 | } | |
5226 | ||
5227 | template<bool big_endian> | |
62fe925a | 5228 | static unsigned char* |
f3a0ed29 AM |
5229 | restfpr(unsigned char* p, int r) |
5230 | { | |
5231 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
5232 | write_insn<big_endian>(p, insn); | |
5233 | return p + 4; | |
5234 | } | |
5235 | ||
5236 | template<bool big_endian> | |
62fe925a | 5237 | static unsigned char* |
f3a0ed29 AM |
5238 | restfpr0_tail(unsigned char* p, int r) |
5239 | { | |
5240 | write_insn<big_endian>(p, ld_0_1 + 16); | |
5241 | p = p + 4; | |
5242 | p = restfpr<big_endian>(p, r); | |
5243 | write_insn<big_endian>(p, mtlr_0); | |
5244 | p = p + 4; | |
5245 | if (r == 29) | |
5246 | { | |
5247 | p = restfpr<big_endian>(p, 30); | |
5248 | p = restfpr<big_endian>(p, 31); | |
5249 | } | |
5250 | write_insn<big_endian>(p, blr); | |
5251 | return p + 4; | |
5252 | } | |
5253 | ||
5254 | template<bool big_endian> | |
62fe925a | 5255 | static unsigned char* |
f3a0ed29 AM |
5256 | savefpr1_tail(unsigned char* p, int r) |
5257 | { | |
5258 | p = savefpr<big_endian>(p, r); | |
5259 | write_insn<big_endian>(p, blr); | |
5260 | return p + 4; | |
5261 | } | |
5262 | ||
5263 | template<bool big_endian> | |
62fe925a | 5264 | static unsigned char* |
f3a0ed29 AM |
5265 | restfpr1_tail(unsigned char* p, int r) |
5266 | { | |
5267 | p = restfpr<big_endian>(p, r); | |
5268 | write_insn<big_endian>(p, blr); | |
5269 | return p + 4; | |
5270 | } | |
5271 | ||
5272 | template<bool big_endian> | |
62fe925a | 5273 | static unsigned char* |
f3a0ed29 AM |
5274 | savevr(unsigned char* p, int r) |
5275 | { | |
5276 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5277 | write_insn<big_endian>(p, insn); | |
5278 | p = p + 4; | |
5279 | insn = stvx_0_12_0 + (r << 21); | |
5280 | write_insn<big_endian>(p, insn); | |
5281 | return p + 4; | |
5282 | } | |
5283 | ||
5284 | template<bool big_endian> | |
62fe925a | 5285 | static unsigned char* |
f3a0ed29 AM |
5286 | savevr_tail(unsigned char* p, int r) |
5287 | { | |
5288 | p = savevr<big_endian>(p, r); | |
5289 | write_insn<big_endian>(p, blr); | |
5290 | return p + 4; | |
5291 | } | |
5292 | ||
5293 | template<bool big_endian> | |
62fe925a | 5294 | static unsigned char* |
f3a0ed29 AM |
5295 | restvr(unsigned char* p, int r) |
5296 | { | |
5297 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
5298 | write_insn<big_endian>(p, insn); | |
5299 | p = p + 4; | |
5300 | insn = lvx_0_12_0 + (r << 21); | |
5301 | write_insn<big_endian>(p, insn); | |
5302 | return p + 4; | |
5303 | } | |
5304 | ||
5305 | template<bool big_endian> | |
62fe925a | 5306 | static unsigned char* |
f3a0ed29 AM |
5307 | restvr_tail(unsigned char* p, int r) |
5308 | { | |
5309 | p = restvr<big_endian>(p, r); | |
5310 | write_insn<big_endian>(p, blr); | |
5311 | return p + 4; | |
5312 | } | |
5313 | ||
5314 | ||
5315 | template<int size, bool big_endian> | |
5316 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
5317 | Symbol_table* symtab) | |
5318 | : Output_section_data_build(4), | |
5319 | contents_(NULL) | |
5320 | { | |
5321 | this->savres_define(symtab, | |
5322 | "_savegpr0_", 14, 31, | |
5323 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
5324 | this->savres_define(symtab, | |
5325 | "_restgpr0_", 14, 29, | |
5326 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5327 | this->savres_define(symtab, | |
5328 | "_restgpr0_", 30, 31, | |
5329 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
5330 | this->savres_define(symtab, | |
5331 | "_savegpr1_", 14, 31, | |
5332 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
5333 | this->savres_define(symtab, | |
5334 | "_restgpr1_", 14, 31, | |
5335 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
5336 | this->savres_define(symtab, | |
5337 | "_savefpr_", 14, 31, | |
5338 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
5339 | this->savres_define(symtab, | |
5340 | "_restfpr_", 14, 29, | |
5341 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5342 | this->savres_define(symtab, | |
5343 | "_restfpr_", 30, 31, | |
5344 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
5345 | this->savres_define(symtab, | |
5346 | "._savef", 14, 31, | |
5347 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
5348 | this->savres_define(symtab, | |
5349 | "._restf", 14, 31, | |
5350 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
5351 | this->savres_define(symtab, | |
5352 | "_savevr_", 20, 31, | |
5353 | savevr<big_endian>, savevr_tail<big_endian>); | |
5354 | this->savres_define(symtab, | |
5355 | "_restvr_", 20, 31, | |
5356 | restvr<big_endian>, restvr_tail<big_endian>); | |
5357 | } | |
5358 | ||
5359 | template<int size, bool big_endian> | |
5360 | void | |
5361 | Output_data_save_res<size, big_endian>::savres_define( | |
5362 | Symbol_table* symtab, | |
5363 | const char *name, | |
5364 | unsigned int lo, unsigned int hi, | |
5365 | unsigned char* write_ent(unsigned char*, int), | |
5366 | unsigned char* write_tail(unsigned char*, int)) | |
5367 | { | |
5368 | size_t len = strlen(name); | |
5369 | bool writing = false; | |
5370 | char sym[16]; | |
5371 | ||
5372 | memcpy(sym, name, len); | |
5373 | sym[len + 2] = 0; | |
5374 | ||
5375 | for (unsigned int i = lo; i <= hi; i++) | |
5376 | { | |
5377 | sym[len + 0] = i / 10 + '0'; | |
5378 | sym[len + 1] = i % 10 + '0'; | |
5379 | Symbol* gsym = symtab->lookup(sym); | |
5380 | bool refd = gsym != NULL && gsym->is_undefined(); | |
5381 | writing = writing || refd; | |
5382 | if (writing) | |
5383 | { | |
5384 | if (this->contents_ == NULL) | |
5385 | this->contents_ = new unsigned char[this->savres_max]; | |
5386 | ||
ec661b9d | 5387 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
5388 | unsigned char* p = this->contents_ + value; |
5389 | if (i != hi) | |
5390 | p = write_ent(p, i); | |
5391 | else | |
5392 | p = write_tail(p, i); | |
ec661b9d | 5393 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
5394 | this->set_current_data_size(cur_size); |
5395 | if (refd) | |
5396 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
5397 | this, value, cur_size - value, | |
5398 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
5399 | elfcpp::STV_HIDDEN, 0, false, false); | |
5400 | } | |
5401 | } | |
5402 | } | |
5403 | ||
5404 | // Write out save/restore. | |
5405 | ||
5406 | template<int size, bool big_endian> | |
5407 | void | |
5408 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
5409 | { | |
ec661b9d | 5410 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
5411 | const section_size_type oview_size = |
5412 | convert_to_section_size_type(this->data_size()); | |
5413 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5414 | memcpy(oview, this->contents_, oview_size); | |
5415 | of->write_output_view(off, oview_size, oview); | |
5416 | } | |
5417 | ||
5418 | ||
cf43a2fe | 5419 | // Create the glink section. |
42cacb20 | 5420 | |
cf43a2fe AM |
5421 | template<int size, bool big_endian> |
5422 | void | |
5423 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
5424 | { | |
5425 | if (this->glink_ == NULL) | |
5426 | { | |
5427 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 5428 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
5429 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
5430 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
5431 | this->glink_, ORDER_TEXT, false); | |
5432 | } | |
42cacb20 DE |
5433 | } |
5434 | ||
5435 | // Create a PLT entry for a global symbol. | |
5436 | ||
5437 | template<int size, bool big_endian> | |
5438 | void | |
ec661b9d AM |
5439 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
5440 | Layout* layout, | |
5441 | Symbol* gsym) | |
42cacb20 | 5442 | { |
e5d5f5ed AM |
5443 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
5444 | && gsym->can_use_relative_reloc(false)) | |
5445 | { | |
5446 | if (this->iplt_ == NULL) | |
40b469d7 | 5447 | this->make_iplt_section(symtab, layout); |
03e25981 | 5448 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
5449 | } |
5450 | else | |
5451 | { | |
5452 | if (this->plt_ == NULL) | |
40b469d7 | 5453 | this->make_plt_section(symtab, layout); |
03e25981 | 5454 | this->plt_->add_entry(gsym); |
e5d5f5ed | 5455 | } |
e5d5f5ed | 5456 | } |
42cacb20 | 5457 | |
e5d5f5ed | 5458 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 5459 | |
e5d5f5ed AM |
5460 | template<int size, bool big_endian> |
5461 | void | |
5462 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 5463 | Symbol_table* symtab, |
e5d5f5ed | 5464 | Layout* layout, |
ec661b9d AM |
5465 | Sized_relobj_file<size, big_endian>* relobj, |
5466 | unsigned int r_sym) | |
e5d5f5ed AM |
5467 | { |
5468 | if (this->iplt_ == NULL) | |
40b469d7 | 5469 | this->make_iplt_section(symtab, layout); |
03e25981 | 5470 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
5471 | } |
5472 | ||
0e70b911 CC |
5473 | // Return the number of entries in the PLT. |
5474 | ||
5475 | template<int size, bool big_endian> | |
5476 | unsigned int | |
5477 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
5478 | { | |
5479 | if (this->plt_ == NULL) | |
5480 | return 0; | |
b3ccdeb5 | 5481 | return this->plt_->entry_count(); |
0e70b911 CC |
5482 | } |
5483 | ||
dd93cd0a | 5484 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
5485 | |
5486 | template<int size, bool big_endian> | |
5487 | unsigned int | |
dd93cd0a | 5488 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
5489 | Symbol_table* symtab, |
5490 | Layout* layout, | |
5491 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 5492 | { |
dd93cd0a | 5493 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
5494 | { |
5495 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5496 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
5497 | Output_data_got_powerpc<size, big_endian>* got |
5498 | = this->got_section(symtab, layout); | |
5499 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
5500 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
5501 | got_offset, 0); | |
dd93cd0a | 5502 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 5503 | } |
dd93cd0a | 5504 | return this->tlsld_got_offset_; |
42cacb20 DE |
5505 | } |
5506 | ||
95a2c8d6 RS |
5507 | // Get the Reference_flags for a particular relocation. |
5508 | ||
5509 | template<int size, bool big_endian> | |
5510 | int | |
88b8e639 AM |
5511 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
5512 | unsigned int r_type, | |
5513 | const Target_powerpc* target) | |
95a2c8d6 | 5514 | { |
88b8e639 AM |
5515 | int ref = 0; |
5516 | ||
95a2c8d6 RS |
5517 | switch (r_type) |
5518 | { | |
5519 | case elfcpp::R_POWERPC_NONE: | |
5520 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5521 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
5522 | case elfcpp::R_PPC64_TOC: | |
5523 | // No symbol reference. | |
88b8e639 | 5524 | break; |
95a2c8d6 | 5525 | |
dd93cd0a AM |
5526 | case elfcpp::R_PPC64_ADDR64: |
5527 | case elfcpp::R_PPC64_UADDR64: | |
5528 | case elfcpp::R_POWERPC_ADDR32: | |
5529 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 5530 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 5531 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
5532 | case elfcpp::R_POWERPC_ADDR16_LO: |
5533 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5534 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
5535 | ref = Symbol::ABSOLUTE_REF; |
5536 | break; | |
95a2c8d6 | 5537 | |
dd93cd0a AM |
5538 | case elfcpp::R_POWERPC_ADDR24: |
5539 | case elfcpp::R_POWERPC_ADDR14: | |
5540 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5541 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
5542 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
5543 | break; | |
dd93cd0a | 5544 | |
e5d5f5ed | 5545 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 5546 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 5547 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
5548 | case elfcpp::R_POWERPC_REL16: |
5549 | case elfcpp::R_POWERPC_REL16_LO: | |
5550 | case elfcpp::R_POWERPC_REL16_HI: | |
5551 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
5552 | ref = Symbol::RELATIVE_REF; |
5553 | break; | |
95a2c8d6 | 5554 | |
dd93cd0a | 5555 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 5556 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
5557 | case elfcpp::R_POWERPC_REL14: |
5558 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5559 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
5560 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
5561 | break; | |
95a2c8d6 RS |
5562 | |
5563 | case elfcpp::R_POWERPC_GOT16: | |
5564 | case elfcpp::R_POWERPC_GOT16_LO: | |
5565 | case elfcpp::R_POWERPC_GOT16_HI: | |
5566 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
5567 | case elfcpp::R_PPC64_GOT16_DS: |
5568 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
5569 | case elfcpp::R_PPC64_TOC16: |
5570 | case elfcpp::R_PPC64_TOC16_LO: | |
5571 | case elfcpp::R_PPC64_TOC16_HI: | |
5572 | case elfcpp::R_PPC64_TOC16_HA: | |
5573 | case elfcpp::R_PPC64_TOC16_DS: | |
5574 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
32d849b3 | 5575 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 5576 | break; |
95a2c8d6 RS |
5577 | |
5578 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
5579 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
5580 | ref = Symbol::TLS_REF; |
5581 | break; | |
95a2c8d6 RS |
5582 | |
5583 | case elfcpp::R_POWERPC_COPY: | |
5584 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5585 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5586 | case elfcpp::R_POWERPC_RELATIVE: | |
5587 | case elfcpp::R_POWERPC_DTPMOD: | |
5588 | default: | |
5589 | // Not expected. We will give an error later. | |
88b8e639 | 5590 | break; |
95a2c8d6 | 5591 | } |
88b8e639 AM |
5592 | |
5593 | if (size == 64 && target->abiversion() < 2) | |
5594 | ref |= Symbol::FUNC_DESC_ABI; | |
5595 | return ref; | |
95a2c8d6 RS |
5596 | } |
5597 | ||
42cacb20 DE |
5598 | // Report an unsupported relocation against a local symbol. |
5599 | ||
5600 | template<int size, bool big_endian> | |
5601 | void | |
5602 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
5603 | Sized_relobj_file<size, big_endian>* object, |
5604 | unsigned int r_type) | |
42cacb20 DE |
5605 | { |
5606 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
5607 | object->name().c_str(), r_type); | |
5608 | } | |
5609 | ||
5610 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
5611 | // dynamic linker does not support it, issue an error. | |
5612 | ||
5613 | template<int size, bool big_endian> | |
5614 | void | |
5615 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
5616 | unsigned int r_type) | |
5617 | { | |
5618 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
5619 | ||
5620 | // These are the relocation types supported by glibc for both 32-bit | |
5621 | // and 64-bit powerpc. | |
5622 | switch (r_type) | |
5623 | { | |
3ea0a085 | 5624 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
5625 | case elfcpp::R_POWERPC_RELATIVE: |
5626 | case elfcpp::R_POWERPC_GLOB_DAT: | |
5627 | case elfcpp::R_POWERPC_DTPMOD: | |
5628 | case elfcpp::R_POWERPC_DTPREL: | |
5629 | case elfcpp::R_POWERPC_TPREL: | |
5630 | case elfcpp::R_POWERPC_JMP_SLOT: | |
5631 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 5632 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 5633 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 5634 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 5635 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
5636 | case elfcpp::R_POWERPC_ADDR16: |
5637 | case elfcpp::R_POWERPC_UADDR16: | |
5638 | case elfcpp::R_POWERPC_ADDR16_LO: | |
5639 | case elfcpp::R_POWERPC_ADDR16_HI: | |
5640 | case elfcpp::R_POWERPC_ADDR16_HA: | |
5641 | case elfcpp::R_POWERPC_ADDR14: | |
5642 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5643 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5644 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 5645 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
5646 | case elfcpp::R_POWERPC_TPREL16: |
5647 | case elfcpp::R_POWERPC_TPREL16_LO: | |
5648 | case elfcpp::R_POWERPC_TPREL16_HI: | |
5649 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
5650 | return; |
5651 | ||
5652 | default: | |
5653 | break; | |
5654 | } | |
5655 | ||
5656 | if (size == 64) | |
5657 | { | |
5658 | switch (r_type) | |
5659 | { | |
5660 | // These are the relocation types supported only on 64-bit. | |
5661 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 5662 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 5663 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 5664 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 5665 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
5666 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5667 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
5668 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5669 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5670 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5671 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 5672 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
5673 | case elfcpp::R_POWERPC_ADDR30: |
5674 | case elfcpp::R_PPC64_TPREL16_DS: | |
5675 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
5676 | case elfcpp::R_PPC64_TPREL16_HIGH: |
5677 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
5678 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
5679 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
5680 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
5681 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
5682 | return; |
5683 | ||
5684 | default: | |
5685 | break; | |
5686 | } | |
5687 | } | |
5688 | else | |
5689 | { | |
5690 | switch (r_type) | |
5691 | { | |
5692 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
5693 | // ??? glibc ld.so doesn't need to support these. |
5694 | case elfcpp::R_POWERPC_DTPREL16: | |
5695 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
5696 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
5697 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
5698 | return; | |
42cacb20 DE |
5699 | |
5700 | default: | |
5701 | break; | |
5702 | } | |
5703 | } | |
5704 | ||
5705 | // This prevents us from issuing more than one error per reloc | |
5706 | // section. But we can still wind up issuing more than one | |
5707 | // error per object file. | |
5708 | if (this->issued_non_pic_error_) | |
5709 | return; | |
33aea2fd | 5710 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
5711 | object->error(_("requires unsupported dynamic reloc; " |
5712 | "recompile with -fPIC")); | |
5713 | this->issued_non_pic_error_ = true; | |
5714 | return; | |
5715 | } | |
5716 | ||
e5d5f5ed AM |
5717 | // Return whether we need to make a PLT entry for a relocation of the |
5718 | // given type against a STT_GNU_IFUNC symbol. | |
5719 | ||
5720 | template<int size, bool big_endian> | |
5721 | bool | |
5722 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 5723 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 5724 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
5725 | unsigned int r_type, |
5726 | bool report_err) | |
e5d5f5ed | 5727 | { |
c9824451 AM |
5728 | // In non-pic code any reference will resolve to the plt call stub |
5729 | // for the ifunc symbol. | |
9055360d AM |
5730 | if ((size == 32 || target->abiversion() >= 2) |
5731 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
5732 | return true; |
5733 | ||
e5d5f5ed AM |
5734 | switch (r_type) |
5735 | { | |
b3ccdeb5 | 5736 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
5737 | case elfcpp::R_POWERPC_ADDR32: |
5738 | case elfcpp::R_POWERPC_UADDR32: | |
5739 | if (size == 32) | |
b3ccdeb5 | 5740 | return false; |
e5d5f5ed AM |
5741 | break; |
5742 | ||
5743 | case elfcpp::R_PPC64_ADDR64: | |
5744 | case elfcpp::R_PPC64_UADDR64: | |
5745 | if (size == 64) | |
b3ccdeb5 | 5746 | return false; |
e5d5f5ed AM |
5747 | break; |
5748 | ||
b3ccdeb5 | 5749 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
5750 | case elfcpp::R_POWERPC_GOT16: |
5751 | case elfcpp::R_POWERPC_GOT16_LO: | |
5752 | case elfcpp::R_POWERPC_GOT16_HI: | |
5753 | case elfcpp::R_POWERPC_GOT16_HA: | |
5754 | case elfcpp::R_PPC64_GOT16_DS: | |
5755 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 5756 | return false; |
e5d5f5ed | 5757 | |
b3ccdeb5 | 5758 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
5759 | case elfcpp::R_POWERPC_ADDR24: |
5760 | case elfcpp::R_POWERPC_ADDR14: | |
5761 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5762 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
5763 | case elfcpp::R_POWERPC_REL24: | |
5764 | case elfcpp::R_PPC_PLTREL24: | |
5765 | case elfcpp::R_POWERPC_REL14: | |
5766 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5767 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
5768 | return true; | |
5769 | ||
5770 | default: | |
5771 | break; | |
5772 | } | |
5773 | ||
5774 | // Anything else is a problem. | |
5775 | // If we are building a static executable, the libc startup function | |
5776 | // responsible for applying indirect function relocations is going | |
5777 | // to complain about the reloc type. | |
5778 | // If we are building a dynamic executable, we will have a text | |
5779 | // relocation. The dynamic loader will set the text segment | |
5780 | // writable and non-executable to apply text relocations. So we'll | |
5781 | // segfault when trying to run the indirection function to resolve | |
5782 | // the reloc. | |
b3ccdeb5 AM |
5783 | if (report_err) |
5784 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
5785 | object->name().c_str(), r_type); |
5786 | return false; | |
5787 | } | |
5788 | ||
5edad15d AM |
5789 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
5790 | // reloc. | |
5791 | ||
5792 | static bool | |
5793 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
5794 | { | |
5795 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
5796 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
5797 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
5798 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
5799 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
5800 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
5801 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
5802 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
5803 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
5804 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
5805 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
5806 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
5807 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
5808 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
5809 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
5810 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
5811 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
5812 | /* Exclude lfqu by testing reloc. If relocs are ever | |
5813 | defined for the reduced D field in psq_lu then those | |
5814 | will need testing too. */ | |
5815 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
5816 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
5817 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
5818 | && (insn & 1) == 0) | |
5819 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
5820 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
5821 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
5822 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
5823 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
5824 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
5825 | && (insn & 1) == 0)); | |
5826 | } | |
5827 | ||
42cacb20 DE |
5828 | // Scan a relocation for a local symbol. |
5829 | ||
5830 | template<int size, bool big_endian> | |
5831 | inline void | |
5832 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
5833 | Symbol_table* symtab, |
5834 | Layout* layout, | |
5835 | Target_powerpc<size, big_endian>* target, | |
5836 | Sized_relobj_file<size, big_endian>* object, | |
5837 | unsigned int data_shndx, | |
5838 | Output_section* output_section, | |
5839 | const elfcpp::Rela<size, big_endian>& reloc, | |
5840 | unsigned int r_type, | |
e5d5f5ed | 5841 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 5842 | bool is_discarded) |
42cacb20 | 5843 | { |
e3deeb9c AM |
5844 | this->maybe_skip_tls_get_addr_call(r_type, NULL); |
5845 | ||
5846 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
5847 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
5848 | { | |
5849 | this->expect_tls_get_addr_call(); | |
5850 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
5851 | if (tls_type != tls::TLSOPT_NONE) | |
5852 | this->skip_next_tls_get_addr_call(); | |
5853 | } | |
5854 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
5855 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
5856 | { | |
5857 | this->expect_tls_get_addr_call(); | |
5858 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
5859 | if (tls_type != tls::TLSOPT_NONE) | |
5860 | this->skip_next_tls_get_addr_call(); | |
5861 | } | |
5862 | ||
dd93cd0a AM |
5863 | Powerpc_relobj<size, big_endian>* ppc_object |
5864 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
5865 | ||
bfdfa4cd AM |
5866 | if (is_discarded) |
5867 | { | |
5868 | if (size == 64 | |
5869 | && data_shndx == ppc_object->opd_shndx() | |
5870 | && r_type == elfcpp::R_PPC64_ADDR64) | |
5871 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
5872 | return; | |
5873 | } | |
5874 | ||
e5d5f5ed AM |
5875 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
5876 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 5877 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 5878 | { |
ec661b9d AM |
5879 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
5880 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5881 | r_type, r_sym, reloc.get_r_addend()); | |
5882 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 5883 | } |
e5d5f5ed | 5884 | |
42cacb20 DE |
5885 | switch (r_type) |
5886 | { | |
5887 | case elfcpp::R_POWERPC_NONE: | |
5888 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
5889 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6ce78956 | 5890 | case elfcpp::R_PPC64_TOCSAVE: |
7404fe1b | 5891 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 5892 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
5893 | break; |
5894 | ||
5895 | case elfcpp::R_PPC64_TOC: | |
5896 | { | |
5897 | Output_data_got_powerpc<size, big_endian>* got | |
5898 | = target->got_section(symtab, layout); | |
5899 | if (parameters->options().output_is_position_independent()) | |
5900 | { | |
bfdfa4cd AM |
5901 | Address off = reloc.get_r_offset(); |
5902 | if (size == 64 | |
9055360d | 5903 | && target->abiversion() < 2 |
bfdfa4cd AM |
5904 | && data_shndx == ppc_object->opd_shndx() |
5905 | && ppc_object->get_opd_discard(off - 8)) | |
5906 | break; | |
5907 | ||
dd93cd0a | 5908 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 5909 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
5910 | rela_dyn->add_output_section_relative(got->output_section(), |
5911 | elfcpp::R_POWERPC_RELATIVE, | |
5912 | output_section, | |
bfdfa4cd AM |
5913 | object, data_shndx, off, |
5914 | symobj->toc_base_offset()); | |
dd93cd0a AM |
5915 | } |
5916 | } | |
42cacb20 DE |
5917 | break; |
5918 | ||
5919 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 5920 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 5921 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
5922 | case elfcpp::R_POWERPC_UADDR32: |
5923 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 5924 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 5925 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
5926 | case elfcpp::R_POWERPC_ADDR16_HI: |
5927 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 5928 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
5929 | case elfcpp::R_PPC64_ADDR16_HIGH: |
5930 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
5931 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
5932 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
5933 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
5934 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
5935 | case elfcpp::R_PPC64_ADDR16_DS: | |
5936 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
5937 | case elfcpp::R_POWERPC_ADDR14: | |
5938 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
5939 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
5940 | // If building a shared library (or a position-independent |
5941 | // executable), we need to create a dynamic relocation for | |
5942 | // this location. | |
c9824451 | 5943 | if (parameters->options().output_is_position_independent() |
9055360d | 5944 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 5945 | { |
b3ccdeb5 AM |
5946 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
5947 | is_ifunc); | |
1f98a074 | 5948 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
5949 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
5950 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 5951 | { |
b3ccdeb5 AM |
5952 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
5953 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 5954 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
5955 | output_section, data_shndx, |
5956 | reloc.get_r_offset(), | |
c9824451 | 5957 | reloc.get_r_addend(), false); |
2e702c99 | 5958 | } |
1f98a074 | 5959 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 5960 | { |
dd93cd0a | 5961 | check_non_pic(object, r_type); |
dd93cd0a AM |
5962 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
5963 | data_shndx, reloc.get_r_offset(), | |
5964 | reloc.get_r_addend()); | |
2e702c99 | 5965 | } |
1f98a074 AM |
5966 | else |
5967 | { | |
5968 | gold_assert(lsym.get_st_value() == 0); | |
5969 | unsigned int shndx = lsym.get_st_shndx(); | |
5970 | bool is_ordinary; | |
5971 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
5972 | &is_ordinary); | |
5973 | if (!is_ordinary) | |
5974 | object->error(_("section symbol %u has bad shndx %u"), | |
5975 | r_sym, shndx); | |
5976 | else | |
5977 | rela_dyn->add_local_section(object, shndx, r_type, | |
5978 | output_section, data_shndx, | |
5979 | reloc.get_r_offset()); | |
5980 | } | |
2e702c99 | 5981 | } |
42cacb20 DE |
5982 | break; |
5983 | ||
5984 | case elfcpp::R_POWERPC_REL24: | |
c9824451 | 5985 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 5986 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
5987 | case elfcpp::R_POWERPC_REL14: |
5988 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
5989 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 5990 | if (!is_ifunc) |
0e123f69 AM |
5991 | { |
5992 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
5993 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
5994 | r_type, r_sym, reloc.get_r_addend()); | |
5995 | } | |
ec661b9d AM |
5996 | break; |
5997 | ||
5998 | case elfcpp::R_PPC64_REL64: | |
5999 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6000 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6001 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6002 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6003 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6004 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6005 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6006 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6007 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6008 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6009 | case elfcpp::R_PPC64_SECTOFF_DS: |
6010 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6011 | case elfcpp::R_POWERPC_TPREL16: | |
6012 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6013 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6014 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6015 | case elfcpp::R_PPC64_TPREL16_DS: |
6016 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6017 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6018 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6019 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6020 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6021 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6022 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6023 | case elfcpp::R_POWERPC_DTPREL16: |
6024 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6025 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6026 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6027 | case elfcpp::R_PPC64_DTPREL16_DS: |
6028 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6029 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6030 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6031 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6032 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6033 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6034 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6035 | case elfcpp::R_PPC64_TLSGD: |
6036 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6037 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
6038 | break; |
6039 | ||
6040 | case elfcpp::R_POWERPC_GOT16: | |
6041 | case elfcpp::R_POWERPC_GOT16_LO: | |
6042 | case elfcpp::R_POWERPC_GOT16_HI: | |
6043 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6044 | case elfcpp::R_PPC64_GOT16_DS: |
6045 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6046 | { |
c9269dff | 6047 | // The symbol requires a GOT entry. |
dd93cd0a AM |
6048 | Output_data_got_powerpc<size, big_endian>* got |
6049 | = target->got_section(symtab, layout); | |
6050 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 6051 | |
e5d5f5ed | 6052 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 6053 | { |
b01a4b04 AM |
6054 | if (is_ifunc |
6055 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6056 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
6057 | else | |
6058 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6059 | } | |
6060 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
6061 | { | |
6062 | // If we are generating a shared object or a pie, this | |
6063 | // symbol's GOT entry will be set by a dynamic relocation. | |
6064 | unsigned int off; | |
6065 | off = got->add_constant(0); | |
6066 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 6067 | |
b3ccdeb5 AM |
6068 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6069 | is_ifunc); | |
6070 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6071 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6072 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 6073 | got, off, 0, false); |
2e702c99 | 6074 | } |
42cacb20 DE |
6075 | } |
6076 | break; | |
6077 | ||
cf43a2fe AM |
6078 | case elfcpp::R_PPC64_TOC16: |
6079 | case elfcpp::R_PPC64_TOC16_LO: | |
6080 | case elfcpp::R_PPC64_TOC16_HI: | |
6081 | case elfcpp::R_PPC64_TOC16_HA: | |
6082 | case elfcpp::R_PPC64_TOC16_DS: | |
6083 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6084 | // We need a GOT section. |
6085 | target->got_section(symtab, layout); | |
6086 | break; | |
6087 | ||
dd93cd0a AM |
6088 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6089 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6090 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6091 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6092 | { | |
6093 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6094 | if (tls_type == tls::TLSOPT_NONE) | |
6095 | { | |
6096 | Output_data_got_powerpc<size, big_endian>* got | |
6097 | = target->got_section(symtab, layout); | |
6098 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
6099 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6100 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
6101 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
6102 | } |
6103 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6104 | { | |
6105 | // no GOT relocs needed for Local Exec. | |
6106 | } | |
6107 | else | |
6108 | gold_unreachable(); | |
6109 | } | |
42cacb20 DE |
6110 | break; |
6111 | ||
dd93cd0a AM |
6112 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6113 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6114 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6115 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6116 | { | |
6117 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6118 | if (tls_type == tls::TLSOPT_NONE) | |
6119 | target->tlsld_got_offset(symtab, layout, object); | |
6120 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6121 | { | |
6122 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6123 | if (parameters->options().emit_relocs()) |
6124 | { | |
6125 | Output_section* os = layout->tls_segment()->first_section(); | |
6126 | gold_assert(os != NULL); | |
6127 | os->set_needs_symtab_index(); | |
6128 | } | |
dd93cd0a AM |
6129 | } |
6130 | else | |
6131 | gold_unreachable(); | |
6132 | } | |
42cacb20 | 6133 | break; |
42cacb20 | 6134 | |
dd93cd0a AM |
6135 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
6136 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6137 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6138 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6139 | { | |
6140 | Output_data_got_powerpc<size, big_endian>* got | |
6141 | = target->got_section(symtab, layout); | |
6142 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 6143 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
6144 | } |
6145 | break; | |
42cacb20 | 6146 | |
dd93cd0a AM |
6147 | case elfcpp::R_POWERPC_GOT_TPREL16: |
6148 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6149 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6150 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6151 | { | |
6152 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
6153 | if (tls_type == tls::TLSOPT_NONE) | |
6154 | { | |
dd93cd0a | 6155 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
6156 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
6157 | { | |
6158 | Output_data_got_powerpc<size, big_endian>* got | |
6159 | = target->got_section(symtab, layout); | |
6160 | unsigned int off = got->add_constant(0); | |
6161 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
6162 | ||
6163 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6164 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
6165 | elfcpp::R_POWERPC_TPREL, | |
6166 | got, off, 0); | |
6167 | } | |
dd93cd0a AM |
6168 | } |
6169 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6170 | { | |
6171 | // no GOT relocs needed for Local Exec. | |
6172 | } | |
6173 | else | |
6174 | gold_unreachable(); | |
6175 | } | |
6176 | break; | |
6177 | ||
6178 | default: | |
6179 | unsupported_reloc_local(object, r_type); | |
6180 | break; | |
6181 | } | |
d8f5a274 | 6182 | |
5edad15d AM |
6183 | if (size == 64 |
6184 | && parameters->options().toc_optimize()) | |
6185 | { | |
6186 | if (data_shndx == ppc_object->toc_shndx()) | |
6187 | { | |
6188 | bool ok = true; | |
6189 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
6190 | || (is_ifunc && target->abiversion() < 2)) | |
6191 | ok = false; | |
6192 | else if (parameters->options().output_is_position_independent()) | |
6193 | { | |
6194 | if (is_ifunc) | |
6195 | ok = false; | |
6196 | else | |
6197 | { | |
6198 | unsigned int shndx = lsym.get_st_shndx(); | |
6199 | if (shndx >= elfcpp::SHN_LORESERVE | |
6200 | && shndx != elfcpp::SHN_XINDEX) | |
6201 | ok = false; | |
6202 | } | |
6203 | } | |
6204 | if (!ok) | |
6205 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
6206 | } | |
6207 | ||
6208 | enum {no_check, check_lo, check_ha} insn_check; | |
6209 | switch (r_type) | |
6210 | { | |
6211 | default: | |
6212 | insn_check = no_check; | |
6213 | break; | |
6214 | ||
6215 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6216 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6217 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6218 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6219 | case elfcpp::R_POWERPC_GOT16_HA: | |
6220 | case elfcpp::R_PPC64_TOC16_HA: | |
6221 | insn_check = check_ha; | |
6222 | break; | |
6223 | ||
6224 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6225 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6226 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6227 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6228 | case elfcpp::R_POWERPC_GOT16_LO: | |
6229 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6230 | case elfcpp::R_PPC64_TOC16_LO: | |
6231 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6232 | insn_check = check_lo; | |
6233 | break; | |
6234 | } | |
6235 | ||
6236 | section_size_type slen; | |
6237 | const unsigned char* view = NULL; | |
6238 | if (insn_check != no_check) | |
6239 | { | |
6240 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
6241 | section_size_type off = | |
6242 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
6243 | if (off < slen) | |
6244 | { | |
6245 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
6246 | if (insn_check == check_lo | |
6247 | ? !ok_lo_toc_insn(insn, r_type) | |
6248 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6249 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
6250 | { | |
6251 | ppc_object->set_no_toc_opt(); | |
6252 | gold_warning(_("%s: toc optimization is not supported " | |
6253 | "for %#08x instruction"), | |
6254 | ppc_object->name().c_str(), insn); | |
6255 | } | |
6256 | } | |
6257 | } | |
6258 | ||
6259 | switch (r_type) | |
6260 | { | |
6261 | default: | |
6262 | break; | |
6263 | case elfcpp::R_PPC64_TOC16: | |
6264 | case elfcpp::R_PPC64_TOC16_LO: | |
6265 | case elfcpp::R_PPC64_TOC16_HI: | |
6266 | case elfcpp::R_PPC64_TOC16_HA: | |
6267 | case elfcpp::R_PPC64_TOC16_DS: | |
6268 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6269 | unsigned int shndx = lsym.get_st_shndx(); | |
6270 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6271 | bool is_ordinary; | |
6272 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6273 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
6274 | { | |
6275 | Address dst_off = lsym.get_st_value() + reloc.get_r_offset(); | |
6276 | if (dst_off < ppc_object->section_size(shndx)) | |
6277 | { | |
6278 | bool ok = false; | |
6279 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
6280 | ok = true; | |
6281 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
6282 | { | |
6283 | // Need to check that the insn is a ld | |
6284 | if (!view) | |
6285 | view = ppc_object->section_contents(data_shndx, | |
6286 | &slen, | |
6287 | false); | |
6288 | section_size_type off = | |
6289 | (convert_to_section_size_type(reloc.get_r_offset()) | |
6290 | + (big_endian ? -2 : 3)); | |
6291 | if (off < slen | |
6292 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
6293 | ok = true; | |
6294 | } | |
6295 | if (!ok) | |
6296 | ppc_object->set_no_toc_opt(dst_off); | |
6297 | } | |
6298 | } | |
6299 | break; | |
6300 | } | |
6301 | } | |
6302 | ||
f159cdb6 AM |
6303 | if (size == 32) |
6304 | { | |
6305 | switch (r_type) | |
6306 | { | |
6307 | case elfcpp::R_POWERPC_REL32: | |
6308 | if (ppc_object->got2_shndx() != 0 | |
6309 | && parameters->options().output_is_position_independent()) | |
6310 | { | |
6311 | unsigned int shndx = lsym.get_st_shndx(); | |
6312 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6313 | bool is_ordinary; | |
6314 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6315 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
6316 | && (ppc_object->section_flags(data_shndx) | |
6317 | & elfcpp::SHF_EXECINSTR) != 0) | |
6318 | gold_error(_("%s: unsupported -mbss-plt code"), | |
6319 | ppc_object->name().c_str()); | |
6320 | } | |
6321 | break; | |
6322 | default: | |
6323 | break; | |
6324 | } | |
6325 | } | |
6326 | ||
d8f5a274 AM |
6327 | switch (r_type) |
6328 | { | |
6329 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6330 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6331 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6332 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6333 | case elfcpp::R_POWERPC_GOT16: | |
6334 | case elfcpp::R_PPC64_GOT16_DS: | |
6335 | case elfcpp::R_PPC64_TOC16: | |
6336 | case elfcpp::R_PPC64_TOC16_DS: | |
6337 | ppc_object->set_has_small_toc_reloc(); | |
6338 | default: | |
6339 | break; | |
6340 | } | |
dd93cd0a AM |
6341 | } |
6342 | ||
6343 | // Report an unsupported relocation against a global symbol. | |
6344 | ||
6345 | template<int size, bool big_endian> | |
6346 | void | |
6347 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
6348 | Sized_relobj_file<size, big_endian>* object, | |
6349 | unsigned int r_type, | |
6350 | Symbol* gsym) | |
6351 | { | |
42cacb20 DE |
6352 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
6353 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
6354 | } | |
6355 | ||
6356 | // Scan a relocation for a global symbol. | |
6357 | ||
6358 | template<int size, bool big_endian> | |
6359 | inline void | |
6360 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
6361 | Symbol_table* symtab, |
6362 | Layout* layout, | |
6363 | Target_powerpc<size, big_endian>* target, | |
6364 | Sized_relobj_file<size, big_endian>* object, | |
6365 | unsigned int data_shndx, | |
6366 | Output_section* output_section, | |
6367 | const elfcpp::Rela<size, big_endian>& reloc, | |
6368 | unsigned int r_type, | |
6369 | Symbol* gsym) | |
42cacb20 | 6370 | { |
e3deeb9c AM |
6371 | if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP) |
6372 | return; | |
6373 | ||
6374 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6375 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6376 | { | |
6377 | this->expect_tls_get_addr_call(); | |
6378 | const bool final = gsym->final_value_is_known(); | |
6379 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6380 | if (tls_type != tls::TLSOPT_NONE) | |
6381 | this->skip_next_tls_get_addr_call(); | |
6382 | } | |
6383 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6384 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6385 | { | |
6386 | this->expect_tls_get_addr_call(); | |
6387 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6388 | if (tls_type != tls::TLSOPT_NONE) | |
6389 | this->skip_next_tls_get_addr_call(); | |
6390 | } | |
6391 | ||
dd93cd0a AM |
6392 | Powerpc_relobj<size, big_endian>* ppc_object |
6393 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6394 | ||
e5d5f5ed | 6395 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 6396 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
6397 | bool pushed_ifunc = false; |
6398 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 6399 | { |
0e123f69 | 6400 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 6401 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6402 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 6403 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 6404 | pushed_ifunc = true; |
ec661b9d | 6405 | } |
e5d5f5ed | 6406 | |
42cacb20 DE |
6407 | switch (r_type) |
6408 | { | |
6409 | case elfcpp::R_POWERPC_NONE: | |
6410 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6411 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 6412 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 6413 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6414 | case elfcpp::R_PPC64_ENTRY: |
dd93cd0a AM |
6415 | break; |
6416 | ||
6417 | case elfcpp::R_PPC64_TOC: | |
6418 | { | |
6419 | Output_data_got_powerpc<size, big_endian>* got | |
6420 | = target->got_section(symtab, layout); | |
6421 | if (parameters->options().output_is_position_independent()) | |
6422 | { | |
bfdfa4cd AM |
6423 | Address off = reloc.get_r_offset(); |
6424 | if (size == 64 | |
6425 | && data_shndx == ppc_object->opd_shndx() | |
6426 | && ppc_object->get_opd_discard(off - 8)) | |
6427 | break; | |
6428 | ||
dd93cd0a AM |
6429 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6430 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
6431 | if (data_shndx != ppc_object->opd_shndx()) | |
6432 | symobj = static_cast | |
6433 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6434 | rela_dyn->add_output_section_relative(got->output_section(), | |
6435 | elfcpp::R_POWERPC_RELATIVE, | |
6436 | output_section, | |
bfdfa4cd | 6437 | object, data_shndx, off, |
dd93cd0a AM |
6438 | symobj->toc_base_offset()); |
6439 | } | |
6440 | } | |
42cacb20 DE |
6441 | break; |
6442 | ||
c9269dff | 6443 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 6444 | if (size == 64 |
9055360d | 6445 | && target->abiversion() < 2 |
bfdfa4cd AM |
6446 | && data_shndx == ppc_object->opd_shndx() |
6447 | && (gsym->is_defined_in_discarded_section() | |
6448 | || gsym->object() != object)) | |
6449 | { | |
6450 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6451 | break; | |
6452 | } | |
d8e90251 | 6453 | // Fall through. |
dd93cd0a | 6454 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 6455 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6456 | case elfcpp::R_POWERPC_UADDR32: |
6457 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
6458 | case elfcpp::R_POWERPC_ADDR16: |
6459 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6460 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6461 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6462 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6463 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6464 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6465 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6466 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6467 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6468 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6469 | case elfcpp::R_PPC64_ADDR16_DS: | |
6470 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6471 | case elfcpp::R_POWERPC_ADDR14: | |
6472 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6473 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 6474 | { |
c9269dff AM |
6475 | // Make a PLT entry if necessary. |
6476 | if (gsym->needs_plt_entry()) | |
6477 | { | |
9055360d AM |
6478 | // Since this is not a PC-relative relocation, we may be |
6479 | // taking the address of a function. In that case we need to | |
6480 | // set the entry in the dynamic symbol table to the address of | |
6481 | // the PLT call stub. | |
6482 | bool need_ifunc_plt = false; | |
6483 | if ((size == 32 || target->abiversion() >= 2) | |
6484 | && gsym->is_from_dynobj() | |
6485 | && !parameters->options().output_is_position_independent()) | |
6486 | { | |
6487 | gsym->set_needs_dynsym_value(); | |
6488 | need_ifunc_plt = true; | |
6489 | } | |
6490 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 6491 | { |
0e123f69 | 6492 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6493 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 6494 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
6495 | reloc.get_r_addend()); |
6496 | target->make_plt_entry(symtab, layout, gsym); | |
6497 | } | |
c9269dff AM |
6498 | } |
6499 | // Make a dynamic relocation if necessary. | |
88b8e639 | 6500 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 6501 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 6502 | { |
a82bef93 ST |
6503 | if (!parameters->options().output_is_position_independent() |
6504 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
6505 | { |
6506 | target->copy_reloc(symtab, layout, object, | |
6507 | data_shndx, output_section, gsym, reloc); | |
6508 | } | |
9055360d AM |
6509 | else if ((((size == 32 |
6510 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
6511 | || (size == 64 | |
6512 | && r_type == elfcpp::R_PPC64_ADDR64 | |
6513 | && target->abiversion() >= 2)) | |
627b30b7 AM |
6514 | && gsym->can_use_relative_reloc(false) |
6515 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
6516 | && parameters->options().shared())) | |
6517 | || (size == 64 | |
6518 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 6519 | && target->abiversion() < 2 |
627b30b7 AM |
6520 | && (gsym->can_use_relative_reloc(false) |
6521 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 6522 | { |
b3ccdeb5 AM |
6523 | Reloc_section* rela_dyn |
6524 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6525 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
6526 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6527 | rela_dyn->add_symbolless_global_addend( |
6528 | gsym, dynrel, output_section, object, data_shndx, | |
6529 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
6530 | } |
6531 | else | |
6532 | { | |
b3ccdeb5 AM |
6533 | Reloc_section* rela_dyn |
6534 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 6535 | check_non_pic(object, r_type); |
dd93cd0a AM |
6536 | rela_dyn->add_global(gsym, r_type, output_section, |
6537 | object, data_shndx, | |
6538 | reloc.get_r_offset(), | |
6539 | reloc.get_r_addend()); | |
5edad15d AM |
6540 | |
6541 | if (size == 64 | |
6542 | && parameters->options().toc_optimize() | |
6543 | && data_shndx == ppc_object->toc_shndx()) | |
6544 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
6545 | } |
6546 | } | |
42cacb20 DE |
6547 | } |
6548 | break; | |
6549 | ||
cf43a2fe | 6550 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6551 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
6552 | if (!is_ifunc) |
6553 | { | |
0e123f69 | 6554 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 6555 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 6556 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
6557 | if (gsym->needs_plt_entry() |
6558 | || (!gsym->final_value_is_known() | |
6559 | && (gsym->is_undefined() | |
6560 | || gsym->is_from_dynobj() | |
6561 | || gsym->is_preemptible()))) | |
6562 | target->make_plt_entry(symtab, layout, gsym); | |
6563 | } | |
d8e90251 | 6564 | // Fall through. |
42cacb20 | 6565 | |
3ea0a085 | 6566 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6567 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 6568 | // Make a dynamic relocation if necessary. |
88b8e639 | 6569 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 6570 | { |
a82bef93 ST |
6571 | if (!parameters->options().output_is_position_independent() |
6572 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
6573 | { |
6574 | target->copy_reloc(symtab, layout, object, | |
6575 | data_shndx, output_section, gsym, | |
6576 | reloc); | |
6577 | } | |
6578 | else | |
6579 | { | |
b3ccdeb5 AM |
6580 | Reloc_section* rela_dyn |
6581 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
6582 | check_non_pic(object, r_type); |
6583 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
6584 | data_shndx, reloc.get_r_offset(), | |
6585 | reloc.get_r_addend()); | |
6586 | } | |
6587 | } | |
6588 | break; | |
6589 | ||
ec661b9d AM |
6590 | case elfcpp::R_POWERPC_REL14: |
6591 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6592 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6593 | if (!is_ifunc) |
0e123f69 AM |
6594 | { |
6595 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6596 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6597 | r_type, r_sym, reloc.get_r_addend()); | |
6598 | } | |
ec661b9d AM |
6599 | break; |
6600 | ||
6ce78956 AM |
6601 | case elfcpp::R_POWERPC_REL16: |
6602 | case elfcpp::R_POWERPC_REL16_LO: | |
6603 | case elfcpp::R_POWERPC_REL16_HI: | |
6604 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 6605 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6606 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6607 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6608 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6609 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6610 | case elfcpp::R_PPC64_SECTOFF_DS: |
6611 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6612 | case elfcpp::R_POWERPC_TPREL16: | |
6613 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6614 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6615 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6616 | case elfcpp::R_PPC64_TPREL16_DS: |
6617 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6618 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6619 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6620 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6621 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6622 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6623 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6624 | case elfcpp::R_POWERPC_DTPREL16: |
6625 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6626 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6627 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6628 | case elfcpp::R_PPC64_DTPREL16_DS: |
6629 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6630 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6631 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6632 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6633 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6634 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6635 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6636 | case elfcpp::R_PPC64_TLSGD: |
6637 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6638 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
6639 | break; |
6640 | ||
42cacb20 DE |
6641 | case elfcpp::R_POWERPC_GOT16: |
6642 | case elfcpp::R_POWERPC_GOT16_LO: | |
6643 | case elfcpp::R_POWERPC_GOT16_HI: | |
6644 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
6645 | case elfcpp::R_PPC64_GOT16_DS: |
6646 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 6647 | { |
c9269dff AM |
6648 | // The symbol requires a GOT entry. |
6649 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
6650 | |
6651 | got = target->got_section(symtab, layout); | |
2e702c99 | 6652 | if (gsym->final_value_is_known()) |
2e702c99 | 6653 | { |
b01a4b04 AM |
6654 | if (is_ifunc |
6655 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
6656 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
6657 | else | |
6658 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
6659 | } | |
6660 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
6661 | { | |
6662 | // If we are generating a shared object or a pie, this | |
6663 | // symbol's GOT entry will be set by a dynamic relocation. | |
6664 | unsigned int off = got->add_constant(0); | |
6665 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
6666 | ||
b3ccdeb5 AM |
6667 | Reloc_section* rela_dyn |
6668 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
6669 | ||
e5d5f5ed | 6670 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
6671 | && !((size == 32 |
6672 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
6673 | && gsym->visibility() == elfcpp::STV_PROTECTED |
6674 | && parameters->options().shared())) | |
2e702c99 | 6675 | { |
b3ccdeb5 AM |
6676 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6677 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
6678 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
6679 | } | |
6680 | else | |
6681 | { | |
6682 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
6683 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 6684 | } |
2e702c99 | 6685 | } |
42cacb20 DE |
6686 | } |
6687 | break; | |
6688 | ||
cf43a2fe AM |
6689 | case elfcpp::R_PPC64_TOC16: |
6690 | case elfcpp::R_PPC64_TOC16_LO: | |
6691 | case elfcpp::R_PPC64_TOC16_HI: | |
6692 | case elfcpp::R_PPC64_TOC16_HA: | |
6693 | case elfcpp::R_PPC64_TOC16_DS: | |
6694 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
6695 | // We need a GOT section. |
6696 | target->got_section(symtab, layout); | |
6697 | break; | |
6698 | ||
dd93cd0a AM |
6699 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
6700 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6701 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
6702 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6703 | { | |
6704 | const bool final = gsym->final_value_is_known(); | |
6705 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
6706 | if (tls_type == tls::TLSOPT_NONE) | |
6707 | { | |
6708 | Output_data_got_powerpc<size, big_endian>* got | |
6709 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
6710 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
6711 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
6712 | elfcpp::R_POWERPC_DTPMOD, |
6713 | elfcpp::R_POWERPC_DTPREL); | |
6714 | } | |
6715 | else if (tls_type == tls::TLSOPT_TO_IE) | |
6716 | { | |
acc276d8 AM |
6717 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6718 | { | |
6719 | Output_data_got_powerpc<size, big_endian>* got | |
6720 | = target->got_section(symtab, layout); | |
6721 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6722 | if (gsym->is_undefined() | |
6723 | || gsym->is_from_dynobj()) | |
6724 | { | |
6725 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6726 | elfcpp::R_POWERPC_TPREL); | |
6727 | } | |
6728 | else | |
6729 | { | |
6730 | unsigned int off = got->add_constant(0); | |
6731 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6732 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6733 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6734 | got, off, 0); | |
6735 | } | |
6736 | } | |
dd93cd0a AM |
6737 | } |
6738 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6739 | { | |
6740 | // no GOT relocs needed for Local Exec. | |
6741 | } | |
6742 | else | |
6743 | gold_unreachable(); | |
6744 | } | |
42cacb20 DE |
6745 | break; |
6746 | ||
dd93cd0a AM |
6747 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
6748 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6749 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
6750 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6751 | { | |
6752 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6753 | if (tls_type == tls::TLSOPT_NONE) | |
6754 | target->tlsld_got_offset(symtab, layout, object); | |
6755 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6756 | { | |
6757 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
6758 | if (parameters->options().emit_relocs()) |
6759 | { | |
6760 | Output_section* os = layout->tls_segment()->first_section(); | |
6761 | gold_assert(os != NULL); | |
6762 | os->set_needs_symtab_index(); | |
6763 | } | |
dd93cd0a AM |
6764 | } |
6765 | else | |
6766 | gold_unreachable(); | |
6767 | } | |
6768 | break; | |
6769 | ||
6770 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6771 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6772 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
6773 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6774 | { | |
6775 | Output_data_got_powerpc<size, big_endian>* got | |
6776 | = target->got_section(symtab, layout); | |
bd73a62d AM |
6777 | if (!gsym->final_value_is_known() |
6778 | && (gsym->is_from_dynobj() | |
6779 | || gsym->is_undefined() | |
6780 | || gsym->is_preemptible())) | |
6781 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
6782 | target->rela_dyn_section(layout), | |
6783 | elfcpp::R_POWERPC_DTPREL); | |
6784 | else | |
6785 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
6786 | } |
6787 | break; | |
6788 | ||
6789 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6790 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6791 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
6792 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6793 | { | |
6794 | const bool final = gsym->final_value_is_known(); | |
6795 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
6796 | if (tls_type == tls::TLSOPT_NONE) | |
6797 | { | |
acc276d8 AM |
6798 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
6799 | { | |
6800 | Output_data_got_powerpc<size, big_endian>* got | |
6801 | = target->got_section(symtab, layout); | |
6802 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6803 | if (gsym->is_undefined() | |
6804 | || gsym->is_from_dynobj()) | |
6805 | { | |
6806 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
6807 | elfcpp::R_POWERPC_TPREL); | |
6808 | } | |
6809 | else | |
6810 | { | |
6811 | unsigned int off = got->add_constant(0); | |
6812 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
6813 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
6814 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
6815 | got, off, 0); | |
6816 | } | |
6817 | } | |
dd93cd0a AM |
6818 | } |
6819 | else if (tls_type == tls::TLSOPT_TO_LE) | |
6820 | { | |
6821 | // no GOT relocs needed for Local Exec. | |
6822 | } | |
6823 | else | |
6824 | gold_unreachable(); | |
6825 | } | |
42cacb20 DE |
6826 | break; |
6827 | ||
6828 | default: | |
6829 | unsupported_reloc_global(object, r_type, gsym); | |
6830 | break; | |
6831 | } | |
d8f5a274 | 6832 | |
5edad15d AM |
6833 | if (size == 64 |
6834 | && parameters->options().toc_optimize()) | |
6835 | { | |
6836 | if (data_shndx == ppc_object->toc_shndx()) | |
6837 | { | |
6838 | bool ok = true; | |
6839 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
6840 | || (is_ifunc && target->abiversion() < 2)) | |
6841 | ok = false; | |
6842 | else if (parameters->options().output_is_position_independent() | |
6843 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
6844 | ok = false; | |
6845 | if (!ok) | |
6846 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
6847 | } | |
6848 | ||
6849 | enum {no_check, check_lo, check_ha} insn_check; | |
6850 | switch (r_type) | |
6851 | { | |
6852 | default: | |
6853 | insn_check = no_check; | |
6854 | break; | |
6855 | ||
6856 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
6857 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
6858 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
6859 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
6860 | case elfcpp::R_POWERPC_GOT16_HA: | |
6861 | case elfcpp::R_PPC64_TOC16_HA: | |
6862 | insn_check = check_ha; | |
6863 | break; | |
6864 | ||
6865 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
6866 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
6867 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
6868 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
6869 | case elfcpp::R_POWERPC_GOT16_LO: | |
6870 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
6871 | case elfcpp::R_PPC64_TOC16_LO: | |
6872 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6873 | insn_check = check_lo; | |
6874 | break; | |
6875 | } | |
6876 | ||
6877 | section_size_type slen; | |
6878 | const unsigned char* view = NULL; | |
6879 | if (insn_check != no_check) | |
6880 | { | |
6881 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
6882 | section_size_type off = | |
6883 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
6884 | if (off < slen) | |
6885 | { | |
6886 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
6887 | if (insn_check == check_lo | |
6888 | ? !ok_lo_toc_insn(insn, r_type) | |
6889 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
6890 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
6891 | { | |
6892 | ppc_object->set_no_toc_opt(); | |
6893 | gold_warning(_("%s: toc optimization is not supported " | |
6894 | "for %#08x instruction"), | |
6895 | ppc_object->name().c_str(), insn); | |
6896 | } | |
6897 | } | |
6898 | } | |
6899 | ||
6900 | switch (r_type) | |
6901 | { | |
6902 | default: | |
6903 | break; | |
6904 | case elfcpp::R_PPC64_TOC16: | |
6905 | case elfcpp::R_PPC64_TOC16_LO: | |
6906 | case elfcpp::R_PPC64_TOC16_HI: | |
6907 | case elfcpp::R_PPC64_TOC16_HA: | |
6908 | case elfcpp::R_PPC64_TOC16_DS: | |
6909 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
6910 | if (gsym->source() == Symbol::FROM_OBJECT | |
6911 | && !gsym->object()->is_dynamic()) | |
6912 | { | |
6913 | Powerpc_relobj<size, big_endian>* sym_object | |
6914 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
6915 | bool is_ordinary; | |
6916 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
6917 | if (shndx == sym_object->toc_shndx()) | |
6918 | { | |
6919 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
6920 | Address dst_off = sym->value() + reloc.get_r_offset(); | |
6921 | if (dst_off < sym_object->section_size(shndx)) | |
6922 | { | |
6923 | bool ok = false; | |
6924 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
6925 | ok = true; | |
6926 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
6927 | { | |
6928 | // Need to check that the insn is a ld | |
6929 | if (!view) | |
6930 | view = ppc_object->section_contents(data_shndx, | |
6931 | &slen, | |
6932 | false); | |
6933 | section_size_type off = | |
6934 | (convert_to_section_size_type(reloc.get_r_offset()) | |
6935 | + (big_endian ? -2 : 3)); | |
6936 | if (off < slen | |
6937 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
6938 | ok = true; | |
6939 | } | |
6940 | if (!ok) | |
6941 | sym_object->set_no_toc_opt(dst_off); | |
6942 | } | |
6943 | } | |
6944 | } | |
6945 | break; | |
6946 | } | |
6947 | } | |
6948 | ||
f159cdb6 AM |
6949 | if (size == 32) |
6950 | { | |
6951 | switch (r_type) | |
6952 | { | |
6953 | case elfcpp::R_PPC_LOCAL24PC: | |
6954 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
6955 | gold_error(_("%s: unsupported -mbss-plt code"), | |
6956 | ppc_object->name().c_str()); | |
6957 | break; | |
6958 | default: | |
6959 | break; | |
6960 | } | |
6961 | } | |
6962 | ||
d8f5a274 AM |
6963 | switch (r_type) |
6964 | { | |
6965 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
6966 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
6967 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6968 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
6969 | case elfcpp::R_POWERPC_GOT16: | |
6970 | case elfcpp::R_PPC64_GOT16_DS: | |
6971 | case elfcpp::R_PPC64_TOC16: | |
6972 | case elfcpp::R_PPC64_TOC16_DS: | |
6973 | ppc_object->set_has_small_toc_reloc(); | |
6974 | default: | |
6975 | break; | |
6976 | } | |
42cacb20 DE |
6977 | } |
6978 | ||
6d03d481 ST |
6979 | // Process relocations for gc. |
6980 | ||
6981 | template<int size, bool big_endian> | |
6982 | void | |
6983 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
6984 | Symbol_table* symtab, |
6985 | Layout* layout, | |
6986 | Sized_relobj_file<size, big_endian>* object, | |
6987 | unsigned int data_shndx, | |
6988 | unsigned int, | |
6989 | const unsigned char* prelocs, | |
6990 | size_t reloc_count, | |
6991 | Output_section* output_section, | |
6992 | bool needs_special_offset_handling, | |
6993 | size_t local_symbol_count, | |
6994 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
6995 | { |
6996 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
6997 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
6998 | Classify_reloc; | |
6999 | ||
e81fea4d AM |
7000 | Powerpc_relobj<size, big_endian>* ppc_object |
7001 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7002 | if (size == 64) | |
7003 | ppc_object->set_opd_valid(); | |
7004 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
7005 | { | |
7006 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
7007 | for (p = ppc_object->access_from_map()->begin(); | |
7008 | p != ppc_object->access_from_map()->end(); | |
7009 | ++p) | |
7010 | { | |
7011 | Address dst_off = p->first; | |
7012 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
7013 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
7014 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
7015 | { | |
efc6fa12 | 7016 | Relobj* src_obj = s->first; |
e81fea4d AM |
7017 | unsigned int src_indx = s->second; |
7018 | symtab->gc()->add_reference(src_obj, src_indx, | |
7019 | ppc_object, dst_indx); | |
7020 | } | |
7021 | p->second.clear(); | |
7022 | } | |
7023 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 7024 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
7025 | // Don't look at .opd relocs as .opd will reference everything. |
7026 | return; | |
7027 | } | |
6d03d481 | 7028 | |
4d625b70 | 7029 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
7030 | symtab, |
7031 | layout, | |
7032 | this, | |
7033 | object, | |
7034 | data_shndx, | |
7035 | prelocs, | |
7036 | reloc_count, | |
7037 | output_section, | |
7038 | needs_special_offset_handling, | |
7039 | local_symbol_count, | |
7040 | plocal_symbols); | |
7041 | } | |
7042 | ||
e81fea4d AM |
7043 | // Handle target specific gc actions when adding a gc reference from |
7044 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
7045 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
7046 | // section of a function descriptor. | |
7047 | ||
7048 | template<int size, bool big_endian> | |
7049 | void | |
7050 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
7051 | Symbol_table* symtab, | |
efc6fa12 | 7052 | Relobj* src_obj, |
e81fea4d | 7053 | unsigned int src_shndx, |
efc6fa12 | 7054 | Relobj* dst_obj, |
e81fea4d AM |
7055 | unsigned int dst_shndx, |
7056 | Address dst_off) const | |
7057 | { | |
6c77229c AM |
7058 | if (size != 64 || dst_obj->is_dynamic()) |
7059 | return; | |
7060 | ||
e81fea4d AM |
7061 | Powerpc_relobj<size, big_endian>* ppc_object |
7062 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 7063 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7064 | { |
7065 | if (ppc_object->opd_valid()) | |
7066 | { | |
7067 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
7068 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
7069 | } | |
7070 | else | |
7071 | { | |
7072 | // If we haven't run scan_opd_relocs, we must delay | |
7073 | // processing this function descriptor reference. | |
7074 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
7075 | } | |
7076 | } | |
7077 | } | |
7078 | ||
7079 | // Add any special sections for this symbol to the gc work list. | |
7080 | // For powerpc64, this adds the code section of a function | |
7081 | // descriptor. | |
7082 | ||
7083 | template<int size, bool big_endian> | |
7084 | void | |
7085 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
7086 | Symbol_table* symtab, | |
7087 | Symbol* sym) const | |
7088 | { | |
7089 | if (size == 64) | |
7090 | { | |
7091 | Powerpc_relobj<size, big_endian>* ppc_object | |
7092 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
7093 | bool is_ordinary; | |
7094 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 7095 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
7096 | { |
7097 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
7098 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
7099 | if (ppc_object->opd_valid()) |
7100 | { | |
7101 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
7102 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
7103 | dst_indx)); | |
c6de8ed4 AM |
7104 | } |
7105 | else | |
7106 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
7107 | } |
7108 | } | |
7109 | } | |
7110 | ||
dc3714f3 AM |
7111 | // For a symbol location in .opd, set LOC to the location of the |
7112 | // function entry. | |
7113 | ||
7114 | template<int size, bool big_endian> | |
7115 | void | |
7116 | Target_powerpc<size, big_endian>::do_function_location( | |
7117 | Symbol_location* loc) const | |
7118 | { | |
a2d7bf59 | 7119 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
7120 | { |
7121 | if (loc->object->is_dynamic()) | |
7122 | { | |
7123 | Powerpc_dynobj<size, big_endian>* ppc_object | |
7124 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
7125 | if (loc->shndx == ppc_object->opd_shndx()) | |
7126 | { | |
7127 | Address dest_off; | |
7128 | Address off = loc->offset - ppc_object->opd_address(); | |
7129 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
7130 | loc->offset = dest_off; | |
7131 | } | |
7132 | } | |
7133 | else | |
7134 | { | |
7135 | const Powerpc_relobj<size, big_endian>* ppc_object | |
7136 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
7137 | if (loc->shndx == ppc_object->opd_shndx()) | |
7138 | { | |
7139 | Address dest_off; | |
7140 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
7141 | loc->offset = dest_off; | |
7142 | } | |
7143 | } | |
7144 | } | |
7145 | } | |
7146 | ||
bbec1a5d AM |
7147 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
7148 | // compiled with -fsplit-stack. The function calls non-split-stack | |
7149 | // code. Change the function to ensure it has enough stack space to | |
7150 | // call some random function. | |
7151 | ||
7152 | template<int size, bool big_endian> | |
7153 | void | |
7154 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
7155 | Relobj* object, | |
7156 | unsigned int shndx, | |
7157 | section_offset_type fnoffset, | |
7158 | section_size_type fnsize, | |
6e0813d3 CC |
7159 | const unsigned char* prelocs, |
7160 | size_t reloc_count, | |
bbec1a5d AM |
7161 | unsigned char* view, |
7162 | section_size_type view_size, | |
7163 | std::string* from, | |
7164 | std::string* to) const | |
7165 | { | |
7166 | // 32-bit not supported. | |
7167 | if (size == 32) | |
7168 | { | |
7169 | // warn | |
7170 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
7171 | prelocs, reloc_count, view, view_size, |
7172 | from, to); | |
bbec1a5d AM |
7173 | return; |
7174 | } | |
7175 | ||
7176 | // The function always starts with | |
7177 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
7178 | // addis %r12,%r1,-allocate@ha | |
7179 | // addi %r12,%r12,-allocate@l | |
7180 | // cmpld %r12,%r0 | |
7181 | // but note that the addis or addi may be replaced with a nop | |
7182 | ||
7183 | unsigned char *entry = view + fnoffset; | |
7184 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7185 | ||
7186 | if ((insn & 0xffff0000) == addis_2_12) | |
7187 | { | |
7188 | /* Skip ELFv2 global entry code. */ | |
7189 | entry += 8; | |
7190 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
7191 | } | |
7192 | ||
7193 | unsigned char *pinsn = entry; | |
7194 | bool ok = false; | |
7195 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
7196 | if (insn == ld_private_ss) | |
7197 | { | |
7198 | int32_t allocate = 0; | |
7199 | while (1) | |
7200 | { | |
7201 | pinsn += 4; | |
7202 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
7203 | if ((insn & 0xffff0000) == addis_12_1) | |
7204 | allocate += (insn & 0xffff) << 16; | |
7205 | else if ((insn & 0xffff0000) == addi_12_1 | |
7206 | || (insn & 0xffff0000) == addi_12_12) | |
7207 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
7208 | else if (insn != nop) | |
7209 | break; | |
7210 | } | |
7211 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
7212 | { | |
7213 | int extra = parameters->options().split_stack_adjust_size(); | |
7214 | allocate -= extra; | |
7215 | if (allocate >= 0 || extra < 0) | |
7216 | { | |
7217 | object->error(_("split-stack stack size overflow at " | |
7218 | "section %u offset %0zx"), | |
7219 | shndx, static_cast<size_t>(fnoffset)); | |
7220 | return; | |
7221 | } | |
7222 | pinsn = entry + 4; | |
7223 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
7224 | if (insn != addis_12_1) | |
7225 | { | |
7226 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7227 | pinsn += 4; | |
7228 | insn = addi_12_12 | (allocate & 0xffff); | |
7229 | if (insn != addi_12_12) | |
7230 | { | |
7231 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7232 | pinsn += 4; | |
7233 | } | |
7234 | } | |
7235 | else | |
7236 | { | |
7237 | insn = addi_12_1 | (allocate & 0xffff); | |
7238 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
7239 | pinsn += 4; | |
7240 | } | |
7241 | if (pinsn != entry + 12) | |
7242 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
7243 | ||
7244 | ok = true; | |
7245 | } | |
7246 | } | |
7247 | ||
7248 | if (!ok) | |
7249 | { | |
7250 | if (!object->has_no_split_stack()) | |
7251 | object->error(_("failed to match split-stack sequence at " | |
7252 | "section %u offset %0zx"), | |
7253 | shndx, static_cast<size_t>(fnoffset)); | |
7254 | } | |
7255 | } | |
7256 | ||
42cacb20 DE |
7257 | // Scan relocations for a section. |
7258 | ||
7259 | template<int size, bool big_endian> | |
7260 | void | |
7261 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
7262 | Symbol_table* symtab, |
7263 | Layout* layout, | |
7264 | Sized_relobj_file<size, big_endian>* object, | |
7265 | unsigned int data_shndx, | |
7266 | unsigned int sh_type, | |
7267 | const unsigned char* prelocs, | |
7268 | size_t reloc_count, | |
7269 | Output_section* output_section, | |
7270 | bool needs_special_offset_handling, | |
7271 | size_t local_symbol_count, | |
7272 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
7273 | { |
7274 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7275 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7276 | Classify_reloc; | |
42cacb20 DE |
7277 | |
7278 | if (sh_type == elfcpp::SHT_REL) | |
7279 | { | |
7280 | gold_error(_("%s: unsupported REL reloc section"), | |
7281 | object->name().c_str()); | |
7282 | return; | |
7283 | } | |
7284 | ||
4d625b70 | 7285 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
7286 | symtab, |
7287 | layout, | |
7288 | this, | |
7289 | object, | |
7290 | data_shndx, | |
7291 | prelocs, | |
7292 | reloc_count, | |
7293 | output_section, | |
7294 | needs_special_offset_handling, | |
7295 | local_symbol_count, | |
7296 | plocal_symbols); | |
7297 | } | |
7298 | ||
ec4dbad3 AM |
7299 | // Functor class for processing the global symbol table. |
7300 | // Removes symbols defined on discarded opd entries. | |
7301 | ||
7302 | template<bool big_endian> | |
7303 | class Global_symbol_visitor_opd | |
7304 | { | |
7305 | public: | |
7306 | Global_symbol_visitor_opd() | |
7307 | { } | |
7308 | ||
7309 | void | |
7310 | operator()(Sized_symbol<64>* sym) | |
7311 | { | |
7312 | if (sym->has_symtab_index() | |
7313 | || sym->source() != Symbol::FROM_OBJECT | |
7314 | || !sym->in_real_elf()) | |
7315 | return; | |
7316 | ||
6c77229c AM |
7317 | if (sym->object()->is_dynamic()) |
7318 | return; | |
7319 | ||
ec4dbad3 AM |
7320 | Powerpc_relobj<64, big_endian>* symobj |
7321 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 7322 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
7323 | return; |
7324 | ||
7325 | bool is_ordinary; | |
7326 | unsigned int shndx = sym->shndx(&is_ordinary); | |
7327 | if (shndx == symobj->opd_shndx() | |
7328 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
7329 | { |
7330 | sym->set_undefined(); | |
e3ee8ed4 | 7331 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
7332 | sym->set_is_defined_in_discarded_section(); |
7333 | sym->set_symtab_index(-1U); | |
7334 | } | |
ec4dbad3 AM |
7335 | } |
7336 | }; | |
7337 | ||
f3a0ed29 AM |
7338 | template<int size, bool big_endian> |
7339 | void | |
7340 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
7341 | Layout* layout, | |
7342 | Symbol_table* symtab) | |
7343 | { | |
7344 | if (size == 64) | |
7345 | { | |
d49044c7 AM |
7346 | Output_data_save_res<size, big_endian>* savres |
7347 | = new Output_data_save_res<size, big_endian>(symtab); | |
7348 | this->savres_section_ = savres; | |
f3a0ed29 AM |
7349 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
7350 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
7351 | savres, ORDER_TEXT, false); | |
7352 | } | |
7353 | } | |
7354 | ||
d8f5a274 AM |
7355 | // Sort linker created .got section first (for the header), then input |
7356 | // sections belonging to files using small model code. | |
7357 | ||
7358 | template<bool big_endian> | |
7359 | class Sort_toc_sections | |
7360 | { | |
7361 | public: | |
7362 | bool | |
7363 | operator()(const Output_section::Input_section& is1, | |
7364 | const Output_section::Input_section& is2) const | |
7365 | { | |
7366 | if (!is1.is_input_section() && is2.is_input_section()) | |
7367 | return true; | |
7368 | bool small1 | |
7369 | = (is1.is_input_section() | |
7370 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
7371 | ->has_small_toc_reloc())); | |
7372 | bool small2 | |
7373 | = (is2.is_input_section() | |
7374 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
7375 | ->has_small_toc_reloc())); | |
7376 | return small1 && !small2; | |
7377 | } | |
7378 | }; | |
7379 | ||
42cacb20 DE |
7380 | // Finalize the sections. |
7381 | ||
7382 | template<int size, bool big_endian> | |
7383 | void | |
d5b40221 DK |
7384 | Target_powerpc<size, big_endian>::do_finalize_sections( |
7385 | Layout* layout, | |
f59f41f3 | 7386 | const Input_objects*, |
ec4dbad3 | 7387 | Symbol_table* symtab) |
42cacb20 | 7388 | { |
c9824451 AM |
7389 | if (parameters->doing_static_link()) |
7390 | { | |
7391 | // At least some versions of glibc elf-init.o have a strong | |
7392 | // reference to __rela_iplt marker syms. A weak ref would be | |
7393 | // better.. | |
7394 | if (this->iplt_ != NULL) | |
7395 | { | |
7396 | Reloc_section* rel = this->iplt_->rel_plt(); | |
7397 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
7398 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7399 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7400 | elfcpp::STV_HIDDEN, 0, false, true); | |
7401 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
7402 | Symbol_table::PREDEFINED, rel, 0, 0, | |
7403 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7404 | elfcpp::STV_HIDDEN, 0, true, true); | |
7405 | } | |
7406 | else | |
7407 | { | |
7408 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
7409 | Symbol_table::PREDEFINED, 0, 0, | |
7410 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7411 | elfcpp::STV_HIDDEN, 0, true, false); | |
7412 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
7413 | Symbol_table::PREDEFINED, 0, 0, | |
7414 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
7415 | elfcpp::STV_HIDDEN, 0, true, false); | |
7416 | } | |
7417 | } | |
7418 | ||
ec4dbad3 AM |
7419 | if (size == 64) |
7420 | { | |
7421 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
7422 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
7423 | |
7424 | if (!parameters->options().relocatable()) | |
7425 | { | |
7426 | this->define_save_restore_funcs(layout, symtab); | |
7427 | ||
7428 | // Annoyingly, we need to make these sections now whether or | |
7429 | // not we need them. If we delay until do_relax then we | |
7430 | // need to mess with the relaxation machinery checkpointing. | |
7431 | this->got_section(symtab, layout); | |
7432 | this->make_brlt_section(layout); | |
d8f5a274 AM |
7433 | |
7434 | if (parameters->options().toc_sort()) | |
7435 | { | |
7436 | Output_section* os = this->got_->output_section(); | |
7437 | if (os != NULL && os->input_sections().size() > 1) | |
7438 | std::stable_sort(os->input_sections().begin(), | |
7439 | os->input_sections().end(), | |
7440 | Sort_toc_sections<big_endian>()); | |
7441 | } | |
ec661b9d | 7442 | } |
ec4dbad3 AM |
7443 | } |
7444 | ||
42cacb20 | 7445 | // Fill in some more dynamic tags. |
c9269dff | 7446 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 7447 | if (odyn != NULL) |
cf43a2fe | 7448 | { |
c9824451 AM |
7449 | const Reloc_section* rel_plt = (this->plt_ == NULL |
7450 | ? NULL | |
7451 | : this->plt_->rel_plt()); | |
7452 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
7453 | this->rela_dyn_, true, size == 32); | |
7454 | ||
7455 | if (size == 32) | |
dd93cd0a | 7456 | { |
c9824451 AM |
7457 | if (this->got_ != NULL) |
7458 | { | |
7459 | this->got_->finalize_data_size(); | |
7460 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
7461 | this->got_, this->got_->g_o_t()); | |
7462 | } | |
dd93cd0a | 7463 | } |
c9824451 | 7464 | else |
dd93cd0a | 7465 | { |
c9824451 AM |
7466 | if (this->glink_ != NULL) |
7467 | { | |
7468 | this->glink_->finalize_data_size(); | |
7469 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
7470 | this->glink_, | |
ec661b9d | 7471 | (this->glink_->pltresolve_size |
c9824451 AM |
7472 | - 32)); |
7473 | } | |
dd93cd0a | 7474 | } |
c9269dff | 7475 | } |
cf43a2fe | 7476 | |
42cacb20 DE |
7477 | // Emit any relocs we saved in an attempt to avoid generating COPY |
7478 | // relocs. | |
7479 | if (this->copy_relocs_.any_saved_relocs()) | |
7480 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
7481 | } | |
7482 | ||
5edad15d AM |
7483 | // Emit any saved relocs, and mark toc entries using any of these |
7484 | // relocs as not optimizable. | |
aba6bc71 | 7485 | |
5edad15d AM |
7486 | template<int sh_type, int size, bool big_endian> |
7487 | void | |
7488 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
7489 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 7490 | { |
5edad15d AM |
7491 | if (size == 64 |
7492 | && parameters->options().toc_optimize()) | |
7493 | { | |
7494 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
7495 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
7496 | p != this->entries_.end(); | |
7497 | ++p) | |
7498 | { | |
7499 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
7500 | entry = *p; | |
7501 | ||
7502 | // If the symbol is no longer defined in a dynamic object, | |
7503 | // then we emitted a COPY relocation. If it is still | |
7504 | // dynamic then we'll need dynamic relocations and thus | |
7505 | // can't optimize toc entries. | |
7506 | if (entry.sym_->is_from_dynobj()) | |
7507 | { | |
7508 | Powerpc_relobj<size, big_endian>* ppc_object | |
7509 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
7510 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
7511 | ppc_object->set_no_toc_opt(entry.address_); | |
7512 | } | |
7513 | } | |
7514 | } | |
7515 | ||
7516 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
7517 | } |
7518 | ||
3ea0a085 AM |
7519 | // Return the value to use for a branch relocation. |
7520 | ||
7521 | template<int size, bool big_endian> | |
1611bc4a | 7522 | bool |
3ea0a085 | 7523 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 7524 | const Symbol_table* symtab, |
3ea0a085 AM |
7525 | const Sized_symbol<size>* gsym, |
7526 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 7527 | Address *value, |
3ea0a085 AM |
7528 | unsigned int *dest_shndx) |
7529 | { | |
9055360d AM |
7530 | if (size == 32 || this->abiversion() >= 2) |
7531 | gold_unreachable(); | |
3ea0a085 | 7532 | *dest_shndx = 0; |
3ea0a085 AM |
7533 | |
7534 | // If the symbol is defined in an opd section, ie. is a function | |
7535 | // descriptor, use the function descriptor code entry address | |
7536 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 7537 | if (gsym != NULL |
0e123f69 AM |
7538 | && (gsym->source() != Symbol::FROM_OBJECT |
7539 | || gsym->object()->is_dynamic())) | |
1611bc4a | 7540 | return true; |
3ea0a085 AM |
7541 | if (gsym != NULL) |
7542 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7543 | unsigned int shndx = symobj->opd_shndx(); | |
7544 | if (shndx == 0) | |
1611bc4a | 7545 | return true; |
3ea0a085 | 7546 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 7547 | if (opd_addr == invalid_address) |
1611bc4a | 7548 | return true; |
c6905c28 | 7549 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 7550 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
7551 | { |
7552 | Address sec_off; | |
1611bc4a | 7553 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
7554 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
7555 | { | |
7556 | Section_id folded | |
7557 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
7558 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
7559 | *dest_shndx = folded.second; | |
7560 | } | |
3ea0a085 | 7561 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
7562 | if (sec_addr == invalid_address) |
7563 | return false; | |
7564 | ||
3ea0a085 | 7565 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 7566 | *value = sec_addr + sec_off; |
3ea0a085 | 7567 | } |
1611bc4a | 7568 | return true; |
3ea0a085 AM |
7569 | } |
7570 | ||
42cacb20 DE |
7571 | // Perform a relocation. |
7572 | ||
7573 | template<int size, bool big_endian> | |
7574 | inline bool | |
7575 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 7576 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 7577 | unsigned int, |
d83ce4e3 AM |
7578 | Target_powerpc* target, |
7579 | Output_section* os, | |
7580 | size_t relnum, | |
91a65d2f | 7581 | const unsigned char* preloc, |
d83ce4e3 AM |
7582 | const Sized_symbol<size>* gsym, |
7583 | const Symbol_value<size>* psymval, | |
7584 | unsigned char* view, | |
c9269dff AM |
7585 | Address address, |
7586 | section_size_type view_size) | |
42cacb20 | 7587 | { |
0e804863 ILT |
7588 | if (view == NULL) |
7589 | return true; | |
7590 | ||
91a65d2f AM |
7591 | const elfcpp::Rela<size, big_endian> rela(preloc); |
7592 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
e3deeb9c | 7593 | switch (this->maybe_skip_tls_get_addr_call(r_type, gsym)) |
dd93cd0a | 7594 | { |
e3deeb9c AM |
7595 | case Track_tls::NOT_EXPECTED: |
7596 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7597 | _("__tls_get_addr call lacks marker reloc")); | |
7598 | break; | |
7599 | case Track_tls::EXPECTED: | |
7600 | // We have already complained. | |
7601 | break; | |
7602 | case Track_tls::SKIP: | |
7603 | return true; | |
7604 | case Track_tls::NORMAL: | |
7605 | break; | |
dd93cd0a | 7606 | } |
dd93cd0a | 7607 | |
42cacb20 | 7608 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
dd93cd0a | 7609 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
0e123f69 | 7610 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
dcfc7dd4 AM |
7611 | // Offset from start of insn to d-field reloc. |
7612 | const int d_offset = big_endian ? 2 : 0; | |
7613 | ||
3ea0a085 AM |
7614 | Powerpc_relobj<size, big_endian>* const object |
7615 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 7616 | Address value = 0; |
0cfb0717 | 7617 | bool has_stub_value = false; |
e5d5f5ed | 7618 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
b3ccdeb5 | 7619 | if ((gsym != NULL |
88b8e639 | 7620 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
b3ccdeb5 AM |
7621 | : object->local_has_plt_offset(r_sym)) |
7622 | && (!psymval->is_ifunc_symbol() | |
9055360d | 7623 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 7624 | { |
9055360d AM |
7625 | if (size == 64 |
7626 | && gsym != NULL | |
7627 | && target->abiversion() >= 2 | |
7628 | && !parameters->options().output_is_position_independent() | |
7629 | && !is_branch_reloc(r_type)) | |
ec661b9d | 7630 | { |
faa2211d AM |
7631 | Address off = target->glink_section()->find_global_entry(gsym); |
7632 | if (off != invalid_address) | |
6ec65f28 AM |
7633 | { |
7634 | value = target->glink_section()->global_entry_address() + off; | |
7635 | has_stub_value = true; | |
7636 | } | |
ec661b9d | 7637 | } |
c9824451 | 7638 | else |
9055360d AM |
7639 | { |
7640 | Stub_table<size, big_endian>* stub_table | |
7641 | = object->stub_table(relinfo->data_shndx); | |
7642 | if (stub_table == NULL) | |
7643 | { | |
7644 | // This is a ref from a data section to an ifunc symbol. | |
7645 | if (target->stub_tables().size() != 0) | |
7646 | stub_table = target->stub_tables()[0]; | |
7647 | } | |
faa2211d AM |
7648 | if (stub_table != NULL) |
7649 | { | |
7650 | Address off; | |
7651 | if (gsym != NULL) | |
7652 | off = stub_table->find_plt_call_entry(object, gsym, r_type, | |
7653 | rela.get_r_addend()); | |
7654 | else | |
7655 | off = stub_table->find_plt_call_entry(object, r_sym, r_type, | |
7656 | rela.get_r_addend()); | |
7657 | if (off != invalid_address) | |
7658 | { | |
7659 | value = stub_table->stub_address() + off; | |
7660 | has_stub_value = true; | |
7661 | } | |
7662 | } | |
9055360d | 7663 | } |
faa2211d AM |
7664 | // We don't care too much about bogus debug references to |
7665 | // non-local functions, but otherwise there had better be a plt | |
7666 | // call stub or global entry stub as appropriate. | |
7667 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 7668 | } |
cf43a2fe AM |
7669 | |
7670 | if (r_type == elfcpp::R_POWERPC_GOT16 | |
7671 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
7672 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
7673 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
7674 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
7675 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 7676 | { |
cf43a2fe AM |
7677 | if (gsym != NULL) |
7678 | { | |
7679 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
7680 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
7681 | } | |
7682 | else | |
7683 | { | |
cf43a2fe AM |
7684 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
7685 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
7686 | } | |
dd93cd0a | 7687 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
7688 | } |
7689 | else if (r_type == elfcpp::R_PPC64_TOC) | |
7690 | { | |
c9269dff | 7691 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 7692 | + object->toc_base_offset()); |
cf43a2fe AM |
7693 | } |
7694 | else if (gsym != NULL | |
7695 | && (r_type == elfcpp::R_POWERPC_REL24 | |
7696 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 7697 | && has_stub_value) |
cf43a2fe | 7698 | { |
c9269dff AM |
7699 | if (size == 64) |
7700 | { | |
7701 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
7702 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
7703 | bool can_plt_call = false; | |
7704 | if (rela.get_r_offset() + 8 <= view_size) | |
7705 | { | |
3ea0a085 | 7706 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 7707 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
7708 | if ((insn & 1) != 0 |
7709 | && (insn2 == nop | |
7710 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 7711 | { |
b4f7960d AM |
7712 | elfcpp::Swap<32, big_endian>:: |
7713 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
7714 | can_plt_call = true; |
7715 | } | |
7716 | } | |
7717 | if (!can_plt_call) | |
3ea0a085 AM |
7718 | { |
7719 | // If we don't have a branch and link followed by a nop, | |
7720 | // we can't go via the plt because there is no place to | |
7721 | // put a toc restoring instruction. | |
7722 | // Unless we know we won't be returning. | |
7723 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
7724 | can_plt_call = true; | |
7725 | } | |
7726 | if (!can_plt_call) | |
7727 | { | |
ba8ca3e7 AM |
7728 | // g++ as of 20130507 emits self-calls without a |
7729 | // following nop. This is arguably wrong since we have | |
7730 | // conflicting information. On the one hand a global | |
7731 | // symbol and on the other a local call sequence, but | |
7732 | // don't error for this special case. | |
7733 | // It isn't possible to cheaply verify we have exactly | |
7734 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 7735 | bool ok = false; |
c9824451 | 7736 | Address code = value; |
3ea0a085 AM |
7737 | if (gsym->source() == Symbol::FROM_OBJECT |
7738 | && gsym->object() == object) | |
7739 | { | |
9055360d AM |
7740 | unsigned int dest_shndx = 0; |
7741 | if (target->abiversion() < 2) | |
7742 | { | |
7743 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
7744 | code = psymval->value(object, addend); |
7745 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
7746 | &code, &dest_shndx); | |
9055360d | 7747 | } |
3ea0a085 AM |
7748 | bool is_ordinary; |
7749 | if (dest_shndx == 0) | |
7750 | dest_shndx = gsym->shndx(&is_ordinary); | |
7751 | ok = dest_shndx == relinfo->data_shndx; | |
7752 | } | |
7753 | if (!ok) | |
c9824451 AM |
7754 | { |
7755 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7756 | _("call lacks nop, can't restore toc; " | |
7757 | "recompile with -fPIC")); | |
7758 | value = code; | |
7759 | } | |
3ea0a085 | 7760 | } |
c9269dff | 7761 | } |
cf43a2fe | 7762 | } |
dd93cd0a AM |
7763 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
7764 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
7765 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
7766 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
7767 | { | |
7768 | // First instruction of a global dynamic sequence, arg setup insn. | |
7769 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7770 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7771 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
7772 | if (tls_type == tls::TLSOPT_NONE) | |
7773 | got_type = GOT_TYPE_TLSGD; | |
7774 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7775 | got_type = GOT_TYPE_TPREL; | |
7776 | if (got_type != GOT_TYPE_STANDARD) | |
7777 | { | |
7778 | if (gsym != NULL) | |
7779 | { | |
7780 | gold_assert(gsym->has_got_offset(got_type)); | |
7781 | value = gsym->got_offset(got_type); | |
7782 | } | |
7783 | else | |
7784 | { | |
dd93cd0a AM |
7785 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
7786 | value = object->local_got_offset(r_sym, got_type); | |
7787 | } | |
7788 | value -= target->got_section()->got_base_offset(object); | |
7789 | } | |
7790 | if (tls_type == tls::TLSOPT_TO_IE) | |
7791 | { | |
7792 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7793 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7794 | { | |
dcfc7dd4 | 7795 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
7796 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7797 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
7798 | if (size == 32) | |
7799 | insn |= 32 << 26; // lwz | |
7800 | else | |
7801 | insn |= 58 << 26; // ld | |
7802 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7803 | } | |
7804 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
7805 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
7806 | } | |
7807 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7808 | { | |
7809 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
7810 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
7811 | { | |
dcfc7dd4 | 7812 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
7813 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7814 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 7815 | if (size == 32) |
0f81d3f0 AM |
7816 | insn |= addis_0_2; |
7817 | else | |
7818 | insn |= addis_0_13; | |
dd93cd0a AM |
7819 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
7820 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7821 | value = psymval->value(object, rela.get_r_addend()); | |
7822 | } | |
7823 | else | |
7824 | { | |
dcfc7dd4 | 7825 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
7826 | Insn insn = nop; |
7827 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7828 | r_type = elfcpp::R_POWERPC_NONE; | |
7829 | } | |
7830 | } | |
7831 | } | |
7832 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7833 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
7834 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
7835 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
7836 | { | |
7837 | // First instruction of a local dynamic sequence, arg setup insn. | |
7838 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7839 | if (tls_type == tls::TLSOPT_NONE) | |
7840 | { | |
7841 | value = target->tlsld_got_offset(); | |
7842 | value -= target->got_section()->got_base_offset(object); | |
7843 | } | |
7844 | else | |
7845 | { | |
7846 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
7847 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
7848 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
7849 | { | |
dcfc7dd4 | 7850 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
7851 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7852 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 7853 | if (size == 32) |
0f81d3f0 AM |
7854 | insn |= addis_0_2; |
7855 | else | |
7856 | insn |= addis_0_13; | |
dd93cd0a AM |
7857 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
7858 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 7859 | value = dtp_offset; |
dd93cd0a AM |
7860 | } |
7861 | else | |
7862 | { | |
dcfc7dd4 | 7863 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
7864 | Insn insn = nop; |
7865 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7866 | r_type = elfcpp::R_POWERPC_NONE; | |
7867 | } | |
7868 | } | |
7869 | } | |
7870 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
7871 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
7872 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
7873 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
7874 | { | |
7875 | // Accesses relative to a local dynamic sequence address, | |
7876 | // no optimisation here. | |
7877 | if (gsym != NULL) | |
7878 | { | |
7879 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
7880 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
7881 | } | |
7882 | else | |
7883 | { | |
dd93cd0a AM |
7884 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
7885 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
7886 | } | |
7887 | value -= target->got_section()->got_base_offset(object); | |
7888 | } | |
7889 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7890 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
7891 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
7892 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
7893 | { | |
7894 | // First instruction of initial exec sequence. | |
7895 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7896 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7897 | if (tls_type == tls::TLSOPT_NONE) | |
7898 | { | |
7899 | if (gsym != NULL) | |
7900 | { | |
7901 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
7902 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
7903 | } | |
7904 | else | |
7905 | { | |
dd93cd0a AM |
7906 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
7907 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
7908 | } | |
7909 | value -= target->got_section()->got_base_offset(object); | |
7910 | } | |
7911 | else | |
7912 | { | |
7913 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
7914 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
7915 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
7916 | { | |
dcfc7dd4 | 7917 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
7918 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
7919 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
7920 | if (size == 32) | |
7921 | insn |= addis_0_2; | |
7922 | else | |
7923 | insn |= addis_0_13; | |
7924 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7925 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7926 | value = psymval->value(object, rela.get_r_addend()); | |
7927 | } | |
7928 | else | |
7929 | { | |
dcfc7dd4 | 7930 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
7931 | Insn insn = nop; |
7932 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7933 | r_type = elfcpp::R_POWERPC_NONE; | |
7934 | } | |
7935 | } | |
7936 | } | |
7937 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
7938 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7939 | { | |
7940 | // Second instruction of a global dynamic sequence, | |
7941 | // the __tls_get_addr call | |
e3deeb9c | 7942 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
7943 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
7944 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7945 | if (tls_type != tls::TLSOPT_NONE) | |
7946 | { | |
7947 | if (tls_type == tls::TLSOPT_TO_IE) | |
7948 | { | |
7949 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7950 | Insn insn = add_3_3_13; | |
7951 | if (size == 32) | |
7952 | insn = add_3_3_2; | |
7953 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7954 | r_type = elfcpp::R_POWERPC_NONE; | |
7955 | } | |
7956 | else | |
7957 | { | |
7958 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7959 | Insn insn = addi_3_3; | |
7960 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7961 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 7962 | view += d_offset; |
dd93cd0a AM |
7963 | value = psymval->value(object, rela.get_r_addend()); |
7964 | } | |
e3deeb9c | 7965 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
7966 | } |
7967 | } | |
7968 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7969 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7970 | { | |
7971 | // Second instruction of a local dynamic sequence, | |
7972 | // the __tls_get_addr call | |
e3deeb9c | 7973 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
7974 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
7975 | if (tls_type == tls::TLSOPT_TO_LE) | |
7976 | { | |
7977 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7978 | Insn insn = addi_3_3; | |
7979 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 7980 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 7981 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 7982 | view += d_offset; |
7404fe1b | 7983 | value = dtp_offset; |
dd93cd0a AM |
7984 | } |
7985 | } | |
7986 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
7987 | { | |
7988 | // Second instruction of an initial exec sequence | |
7989 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
7990 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7991 | if (tls_type == tls::TLSOPT_TO_LE) | |
7992 | { | |
7993 | Insn* iview = reinterpret_cast<Insn*>(view); | |
7994 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
7995 | unsigned int reg = size == 32 ? 2 : 13; | |
7996 | insn = at_tls_transform(insn, reg); | |
7997 | gold_assert(insn != 0); | |
7998 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
7999 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 8000 | view += d_offset; |
dd93cd0a AM |
8001 | value = psymval->value(object, rela.get_r_addend()); |
8002 | } | |
8003 | } | |
0cfb0717 | 8004 | else if (!has_stub_value) |
cf43a2fe | 8005 | { |
dd93cd0a | 8006 | Address addend = 0; |
cbcb23fa | 8007 | if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24)) |
cf43a2fe | 8008 | addend = rela.get_r_addend(); |
c9824451 | 8009 | value = psymval->value(object, addend); |
dd93cd0a | 8010 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
8011 | { |
8012 | if (target->abiversion() >= 2) | |
8013 | { | |
8014 | if (gsym != NULL) | |
8015 | value += object->ppc64_local_entry_offset(gsym); | |
8016 | else | |
8017 | value += object->ppc64_local_entry_offset(r_sym); | |
8018 | } | |
8019 | else | |
1611bc4a AM |
8020 | { |
8021 | unsigned int dest_shndx; | |
8022 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
8023 | &value, &dest_shndx); | |
8024 | } | |
9055360d | 8025 | } |
cbcb23fa | 8026 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
8027 | if (max_branch_offset != 0 |
8028 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
8029 | { | |
8030 | Stub_table<size, big_endian>* stub_table | |
8031 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
8032 | if (stub_table != NULL) |
8033 | { | |
8034 | Address off = stub_table->find_long_branch_entry(object, value); | |
8035 | if (off != invalid_address) | |
0cfb0717 AM |
8036 | { |
8037 | value = (stub_table->stub_address() + stub_table->plt_size() | |
8038 | + off); | |
8039 | has_stub_value = true; | |
8040 | } | |
0cfdc767 | 8041 | } |
ec661b9d | 8042 | } |
42cacb20 DE |
8043 | } |
8044 | ||
42cacb20 DE |
8045 | switch (r_type) |
8046 | { | |
dd93cd0a AM |
8047 | case elfcpp::R_PPC64_REL64: |
8048 | case elfcpp::R_POWERPC_REL32: | |
8049 | case elfcpp::R_POWERPC_REL24: | |
8050 | case elfcpp::R_PPC_PLTREL24: | |
8051 | case elfcpp::R_PPC_LOCAL24PC: | |
8052 | case elfcpp::R_POWERPC_REL16: | |
8053 | case elfcpp::R_POWERPC_REL16_LO: | |
8054 | case elfcpp::R_POWERPC_REL16_HI: | |
8055 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 8056 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
8057 | case elfcpp::R_POWERPC_REL14: |
8058 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8059 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8060 | value -= address; | |
8061 | break; | |
8062 | ||
42cacb20 DE |
8063 | case elfcpp::R_PPC64_TOC16: |
8064 | case elfcpp::R_PPC64_TOC16_LO: | |
8065 | case elfcpp::R_PPC64_TOC16_HI: | |
8066 | case elfcpp::R_PPC64_TOC16_HA: | |
8067 | case elfcpp::R_PPC64_TOC16_DS: | |
8068 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 8069 | // Subtract the TOC base address. |
c9269dff | 8070 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 8071 | + object->toc_base_offset()); |
42cacb20 DE |
8072 | break; |
8073 | ||
cf43a2fe AM |
8074 | case elfcpp::R_POWERPC_SECTOFF: |
8075 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
8076 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8077 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8078 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8079 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
8080 | if (os != NULL) | |
8081 | value -= os->address(); | |
42cacb20 DE |
8082 | break; |
8083 | ||
dd93cd0a AM |
8084 | case elfcpp::R_PPC64_TPREL16_DS: |
8085 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
8086 | case elfcpp::R_PPC64_TPREL16_HIGH: |
8087 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 8088 | if (size != 64) |
f9c6b907 | 8089 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 8090 | break; |
d8e90251 | 8091 | // Fall through. |
dd93cd0a AM |
8092 | case elfcpp::R_POWERPC_TPREL16: |
8093 | case elfcpp::R_POWERPC_TPREL16_LO: | |
8094 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8095 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8096 | case elfcpp::R_POWERPC_TPREL: | |
8097 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8098 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8099 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8100 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8101 | // tls symbol values are relative to tls_segment()->vaddr() | |
8102 | value -= tp_offset; | |
8103 | break; | |
8104 | ||
8105 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8106 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8107 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
8108 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
8109 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
8110 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
8111 | if (size != 64) | |
8112 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
8113 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
8114 | break; | |
d8e90251 | 8115 | // Fall through. |
dd93cd0a AM |
8116 | case elfcpp::R_POWERPC_DTPREL16: |
8117 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8118 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8119 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8120 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
8121 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
8122 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
8123 | // tls symbol values are relative to tls_segment()->vaddr() |
8124 | value -= dtp_offset; | |
8125 | break; | |
8126 | ||
45965137 AM |
8127 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
8128 | if (gsym != NULL) | |
8129 | value += object->ppc64_local_entry_offset(gsym); | |
8130 | else | |
8131 | value += object->ppc64_local_entry_offset(r_sym); | |
8132 | break; | |
8133 | ||
42cacb20 DE |
8134 | default: |
8135 | break; | |
8136 | } | |
8137 | ||
dd93cd0a | 8138 | Insn branch_bit = 0; |
42cacb20 DE |
8139 | switch (r_type) |
8140 | { | |
dd93cd0a AM |
8141 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
8142 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8143 | branch_bit = 1 << 21; | |
d8e90251 | 8144 | // Fall through. |
dd93cd0a AM |
8145 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
8146 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
8147 | { | |
8148 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8149 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8150 | insn &= ~(1 << 21); | |
8151 | insn |= branch_bit; | |
8152 | if (this->is_isa_v2) | |
8153 | { | |
8154 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
8155 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
8156 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
8157 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
8158 | insn |= 0x02 << 21; | |
8159 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
8160 | insn |= 0x08 << 21; | |
8161 | else | |
8162 | break; | |
8163 | } | |
8164 | else | |
8165 | { | |
8166 | // Invert 'y' bit if not the default. | |
8167 | if (static_cast<Signed_address>(value) < 0) | |
8168 | insn ^= 1 << 21; | |
8169 | } | |
8170 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
8171 | } | |
8172 | break; | |
8173 | ||
8174 | default: | |
8175 | break; | |
8176 | } | |
8177 | ||
aba6bc71 AM |
8178 | if (size == 64) |
8179 | { | |
aba6bc71 AM |
8180 | switch (r_type) |
8181 | { | |
8182 | default: | |
8183 | break; | |
8184 | ||
5edad15d AM |
8185 | // Multi-instruction sequences that access the GOT/TOC can |
8186 | // be optimized, eg. | |
8187 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
8188 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
8189 | // and | |
8190 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
8191 | // to nop; addi rb,r2,x@toc; | |
8192 | // FIXME: the @got sequence shown above is not yet | |
8193 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
8194 | // the ELF @got relocs except for TLS, instead using the | |
8195 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
8196 | // The PowerOpen TOC sequence equivalent to the first | |
8197 | // example is optimized. | |
aba6bc71 AM |
8198 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
8199 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8200 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8201 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8202 | case elfcpp::R_POWERPC_GOT16_HA: | |
8203 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 8204 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8205 | { |
dcfc7dd4 | 8206 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8207 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8208 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
8209 | && object->make_toc_relative(target, &value)) | |
8210 | { | |
8211 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
8212 | == ((15u << 26) | (2 << 16))); | |
8213 | } | |
8214 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
8215 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
8216 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8217 | { |
8218 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
8219 | return true; | |
8220 | } | |
8221 | } | |
8222 | break; | |
8223 | ||
8224 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
8225 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
8226 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
8227 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
8228 | case elfcpp::R_POWERPC_GOT16_LO: | |
8229 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
8230 | case elfcpp::R_PPC64_TOC16_LO: | |
8231 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 8232 | if (parameters->options().toc_optimize()) |
aba6bc71 | 8233 | { |
dcfc7dd4 | 8234 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 8235 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
8236 | bool changed = false; |
8237 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
8238 | && object->make_toc_relative(target, &value)) | |
8239 | { | |
8240 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
8241 | insn ^= (14u << 26) ^ (58u << 26); | |
8242 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
8243 | changed = true; | |
8244 | } | |
8245 | if (ok_lo_toc_insn(insn, r_type) | |
8246 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
8247 | { |
8248 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
8249 | { | |
8250 | // Transform addic to addi when we change reg. | |
8251 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
8252 | insn |= (14u << 26) | (2 << 16); | |
8253 | } | |
8254 | else | |
8255 | { | |
8256 | insn &= ~(0x1f << 16); | |
8257 | insn |= 2 << 16; | |
8258 | } | |
5edad15d | 8259 | changed = true; |
aba6bc71 | 8260 | } |
5edad15d AM |
8261 | if (changed) |
8262 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
8263 | } |
8264 | break; | |
549dba71 AM |
8265 | |
8266 | case elfcpp::R_PPC64_ENTRY: | |
8267 | value = (target->got_section()->output_section()->address() | |
8268 | + object->toc_base_offset()); | |
8269 | if (value + 0x80008000 <= 0xffffffff | |
8270 | && !parameters->options().output_is_position_independent()) | |
8271 | { | |
8272 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8273 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8274 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8275 | ||
8276 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8277 | && insn2 == add_2_2_12) | |
8278 | { | |
8279 | insn1 = lis_2 + ha(value); | |
8280 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8281 | insn2 = addi_2_2 + l(value); | |
8282 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8283 | return true; | |
8284 | } | |
8285 | } | |
8286 | else | |
8287 | { | |
8288 | value -= address; | |
8289 | if (value + 0x80008000 <= 0xffffffff) | |
8290 | { | |
8291 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8292 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8293 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
8294 | ||
8295 | if ((insn1 & ~0xfffc) == ld_2_12 | |
8296 | && insn2 == add_2_2_12) | |
8297 | { | |
8298 | insn1 = addis_2_12 + ha(value); | |
8299 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
8300 | insn2 = addi_2_2 + l(value); | |
8301 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
8302 | return true; | |
8303 | } | |
8304 | } | |
8305 | } | |
8306 | break; | |
e3a7574e AM |
8307 | |
8308 | case elfcpp::R_POWERPC_REL16_LO: | |
8309 | // If we are generating a non-PIC executable, edit | |
8310 | // 0: addis 2,12,.TOC.-0b@ha | |
8311 | // addi 2,2,.TOC.-0b@l | |
8312 | // used by ELFv2 global entry points to set up r2, to | |
8313 | // lis 2,.TOC.@ha | |
8314 | // addi 2,2,.TOC.@l | |
8315 | // if .TOC. is in range. */ | |
8316 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
8317 | && relnum != 0 | |
8318 | && preloc != NULL | |
8319 | && target->abiversion() >= 2 | |
8320 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 8321 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
8322 | && gsym != NULL |
8323 | && strcmp(gsym->name(), ".TOC.") == 0) | |
8324 | { | |
0e123f69 | 8325 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
8326 | Reltype prev_rela(preloc - reloc_size); |
8327 | if ((prev_rela.get_r_info() | |
8328 | == elfcpp::elf_r_info<size>(r_sym, | |
8329 | elfcpp::R_POWERPC_REL16_HA)) | |
8330 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
8331 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
8332 | { | |
dcfc7dd4 | 8333 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
8334 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
8335 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
8336 | ||
8337 | if ((insn1 & 0xffff0000) == addis_2_12 | |
8338 | && (insn2 & 0xffff0000) == addi_2_2) | |
8339 | { | |
8340 | insn1 = lis_2 + ha(value + address - 4); | |
8341 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
8342 | insn2 = addi_2_2 + l(value + address - 4); | |
8343 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
8344 | if (relinfo->rr) | |
8345 | { | |
8346 | relinfo->rr->set_strategy(relnum - 1, | |
8347 | Relocatable_relocs::RELOC_SPECIAL); | |
8348 | relinfo->rr->set_strategy(relnum, | |
8349 | Relocatable_relocs::RELOC_SPECIAL); | |
8350 | } | |
8351 | return true; | |
8352 | } | |
8353 | } | |
8354 | } | |
8355 | break; | |
aba6bc71 AM |
8356 | } |
8357 | } | |
8358 | ||
f4baf0d4 | 8359 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 8360 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
8361 | switch (r_type) |
8362 | { | |
8363 | case elfcpp::R_POWERPC_ADDR32: | |
8364 | case elfcpp::R_POWERPC_UADDR32: | |
8365 | if (size == 64) | |
f4baf0d4 | 8366 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8367 | break; |
8368 | ||
8369 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 8370 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 8371 | if (size == 64) |
f4baf0d4 | 8372 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
8373 | break; |
8374 | ||
dd93cd0a | 8375 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 8376 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
8377 | break; |
8378 | ||
b80eed39 AM |
8379 | case elfcpp::R_POWERPC_ADDR16: |
8380 | // We really should have three separate relocations, | |
8381 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
8382 | // and one for insns with 16-bit unsigned fields. | |
8383 | overflow = Reloc::CHECK_BITFIELD; | |
8384 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
8385 | overflow = Reloc::CHECK_LOW_INSN; | |
8386 | break; | |
8387 | ||
f9c6b907 AM |
8388 | case elfcpp::R_POWERPC_ADDR16_HI: |
8389 | case elfcpp::R_POWERPC_ADDR16_HA: | |
8390 | case elfcpp::R_POWERPC_GOT16_HI: | |
8391 | case elfcpp::R_POWERPC_GOT16_HA: | |
8392 | case elfcpp::R_POWERPC_PLT16_HI: | |
8393 | case elfcpp::R_POWERPC_PLT16_HA: | |
8394 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
8395 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
8396 | case elfcpp::R_PPC64_TOC16_HI: | |
8397 | case elfcpp::R_PPC64_TOC16_HA: | |
8398 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
8399 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
8400 | case elfcpp::R_POWERPC_TPREL16_HI: | |
8401 | case elfcpp::R_POWERPC_TPREL16_HA: | |
8402 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8403 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8404 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
8405 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8406 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
8407 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
8408 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
8409 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8410 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
8411 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8412 | case elfcpp::R_POWERPC_REL16_HI: | |
8413 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
8414 | if (size != 32) |
8415 | overflow = Reloc::CHECK_HIGH_INSN; | |
8416 | break; | |
8417 | ||
dd93cd0a AM |
8418 | case elfcpp::R_POWERPC_REL16: |
8419 | case elfcpp::R_PPC64_TOC16: | |
8420 | case elfcpp::R_POWERPC_GOT16: | |
8421 | case elfcpp::R_POWERPC_SECTOFF: | |
8422 | case elfcpp::R_POWERPC_TPREL16: | |
8423 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
8424 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
8425 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
8426 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
8427 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
8428 | overflow = Reloc::CHECK_LOW_INSN; | |
8429 | break; | |
8430 | ||
8431 | case elfcpp::R_POWERPC_ADDR24: | |
8432 | case elfcpp::R_POWERPC_ADDR14: | |
8433 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
8434 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
8435 | case elfcpp::R_PPC64_ADDR16_DS: | |
8436 | case elfcpp::R_POWERPC_REL24: | |
8437 | case elfcpp::R_PPC_PLTREL24: | |
8438 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
8439 | case elfcpp::R_PPC64_TPREL16_DS: |
8440 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8441 | case elfcpp::R_PPC64_TOC16_DS: | |
8442 | case elfcpp::R_PPC64_GOT16_DS: | |
8443 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8444 | case elfcpp::R_POWERPC_REL14: | |
8445 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8446 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 8447 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 8448 | break; |
dd93cd0a | 8449 | } |
42cacb20 | 8450 | |
dcfc7dd4 | 8451 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
8452 | Insn insn = 0; |
8453 | ||
b80eed39 AM |
8454 | if (overflow == Reloc::CHECK_LOW_INSN |
8455 | || overflow == Reloc::CHECK_HIGH_INSN) | |
8456 | { | |
a680de9a | 8457 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 8458 | |
a47622ac AM |
8459 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
8460 | overflow = Reloc::CHECK_BITFIELD; | |
8461 | else if (overflow == Reloc::CHECK_LOW_INSN | |
8462 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
8463 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
8464 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
8465 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
8466 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
8467 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 8468 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
8469 | else |
8470 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
8471 | } |
8472 | ||
a680de9a | 8473 | bool maybe_dq_reloc = false; |
3ea0a085 | 8474 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 8475 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
8476 | switch (r_type) |
8477 | { | |
8478 | case elfcpp::R_POWERPC_NONE: | |
8479 | case elfcpp::R_POWERPC_TLS: | |
8480 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
8481 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
42cacb20 DE |
8482 | break; |
8483 | ||
8484 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 8485 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 8486 | case elfcpp::R_PPC64_TOC: |
45965137 | 8487 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
8488 | Reloc::addr64(view, value); |
8489 | break; | |
8490 | ||
8491 | case elfcpp::R_POWERPC_TPREL: | |
8492 | case elfcpp::R_POWERPC_DTPREL: | |
8493 | if (size == 64) | |
8494 | Reloc::addr64(view, value); | |
8495 | else | |
3ea0a085 | 8496 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8497 | break; |
8498 | ||
8499 | case elfcpp::R_PPC64_UADDR64: | |
8500 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
8501 | break; |
8502 | ||
8503 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 8504 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
8505 | break; |
8506 | ||
acc276d8 | 8507 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 8508 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 8509 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
8510 | break; |
8511 | ||
8512 | case elfcpp::R_POWERPC_ADDR24: | |
8513 | case elfcpp::R_POWERPC_REL24: | |
8514 | case elfcpp::R_PPC_PLTREL24: | |
8515 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 8516 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
8517 | break; |
8518 | ||
dd93cd0a AM |
8519 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
8520 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
8521 | case elfcpp::R_POWERPC_GOT_TPREL16: |
8522 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
8523 | if (size == 64) |
8524 | { | |
ec86f434 | 8525 | // On ppc64 these are all ds form |
a680de9a | 8526 | maybe_dq_reloc = true; |
dd93cd0a AM |
8527 | break; |
8528 | } | |
c25aa1e1 | 8529 | // Fall through. |
cf43a2fe | 8530 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 8531 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 8532 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 8533 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 8534 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
8535 | case elfcpp::R_POWERPC_TPREL16: |
8536 | case elfcpp::R_POWERPC_DTPREL16: | |
8537 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
8538 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 8539 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 8540 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 8541 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 8542 | case elfcpp::R_POWERPC_GOT16_LO: |
cf43a2fe | 8543 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
8544 | case elfcpp::R_POWERPC_TPREL16_LO: |
8545 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
8546 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
8547 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
8548 | if (size == 64) |
8549 | status = Reloc::addr16(view, value, overflow); | |
8550 | else | |
8551 | maybe_dq_reloc = true; | |
dd93cd0a AM |
8552 | break; |
8553 | ||
8554 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 8555 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
8556 | break; |
8557 | ||
f9c6b907 AM |
8558 | case elfcpp::R_PPC64_ADDR16_HIGH: |
8559 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
8560 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
8561 | if (size == 32) | |
8562 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
8563 | goto unsupp; | |
d8e90251 | 8564 | // Fall through. |
cf43a2fe | 8565 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 8566 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 8567 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 8568 | case elfcpp::R_POWERPC_GOT16_HI: |
cf43a2fe | 8569 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
8570 | case elfcpp::R_POWERPC_TPREL16_HI: |
8571 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
8572 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
8573 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
8574 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
8575 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
8576 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
8577 | break; |
8578 | ||
f9c6b907 AM |
8579 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
8580 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
8581 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
8582 | if (size == 32) | |
8583 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
8584 | goto unsupp; | |
d8e90251 | 8585 | // Fall through. |
cf43a2fe | 8586 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 8587 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 8588 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 8589 | case elfcpp::R_POWERPC_GOT16_HA: |
cf43a2fe | 8590 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
8591 | case elfcpp::R_POWERPC_TPREL16_HA: |
8592 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
8593 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
8594 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
8595 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
8596 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
8597 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
8598 | break; |
8599 | ||
a680de9a PB |
8600 | case elfcpp::R_POWERPC_REL16DX_HA: |
8601 | status = Reloc::addr16dx_ha(view, value, overflow); | |
8602 | break; | |
8603 | ||
dd93cd0a AM |
8604 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
8605 | if (size == 32) | |
8606 | // R_PPC_EMB_NADDR16_LO | |
8607 | goto unsupp; | |
d8e90251 | 8608 | // Fall through. |
dd93cd0a AM |
8609 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
8610 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
8611 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
8612 | break; |
8613 | ||
dd93cd0a AM |
8614 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
8615 | if (size == 32) | |
8616 | // R_PPC_EMB_NADDR16_HI | |
8617 | goto unsupp; | |
d8e90251 | 8618 | // Fall through. |
dd93cd0a AM |
8619 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
8620 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
8621 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
8622 | break; |
8623 | ||
dd93cd0a AM |
8624 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
8625 | if (size == 32) | |
8626 | // R_PPC_EMB_NADDR16_HA | |
8627 | goto unsupp; | |
d8e90251 | 8628 | // Fall through. |
dd93cd0a AM |
8629 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
8630 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
8631 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
8632 | break; |
8633 | ||
dd93cd0a AM |
8634 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
8635 | if (size == 32) | |
8636 | // R_PPC_EMB_SDAI16 | |
8637 | goto unsupp; | |
d8e90251 | 8638 | // Fall through. |
dd93cd0a AM |
8639 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
8640 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
8641 | Reloc::addr16_ha3(view, value); | |
8642 | break; | |
8643 | ||
8644 | case elfcpp::R_PPC64_DTPREL16_DS: | |
8645 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
8646 | if (size == 32) | |
8647 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
8648 | goto unsupp; | |
d8e90251 | 8649 | // Fall through. |
dd93cd0a AM |
8650 | case elfcpp::R_PPC64_TPREL16_DS: |
8651 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
8652 | if (size == 32) | |
8653 | // R_PPC_TLSGD, R_PPC_TLSLD | |
8654 | break; | |
d8e90251 | 8655 | // Fall through. |
cf43a2fe AM |
8656 | case elfcpp::R_PPC64_ADDR16_DS: |
8657 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
8658 | case elfcpp::R_PPC64_TOC16_DS: |
8659 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
8660 | case elfcpp::R_PPC64_GOT16_DS: |
8661 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
8662 | case elfcpp::R_PPC64_SECTOFF_DS: | |
8663 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 8664 | maybe_dq_reloc = true; |
dd93cd0a AM |
8665 | break; |
8666 | ||
8667 | case elfcpp::R_POWERPC_ADDR14: | |
8668 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
8669 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
8670 | case elfcpp::R_POWERPC_REL14: | |
8671 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
8672 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 8673 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
8674 | break; |
8675 | ||
8676 | case elfcpp::R_POWERPC_COPY: | |
8677 | case elfcpp::R_POWERPC_GLOB_DAT: | |
8678 | case elfcpp::R_POWERPC_JMP_SLOT: | |
8679 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 8680 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
8681 | case elfcpp::R_PPC64_JMP_IREL: |
8682 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
8683 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
8684 | _("unexpected reloc %u in object file"), | |
8685 | r_type); | |
8686 | break; | |
8687 | ||
dd93cd0a AM |
8688 | case elfcpp::R_PPC_EMB_SDA21: |
8689 | if (size == 32) | |
8690 | goto unsupp; | |
8691 | else | |
8692 | { | |
8693 | // R_PPC64_TOCSAVE. For the time being this can be ignored. | |
8694 | } | |
8695 | break; | |
8696 | ||
8697 | case elfcpp::R_PPC_EMB_SDA2I16: | |
8698 | case elfcpp::R_PPC_EMB_SDA2REL: | |
8699 | if (size == 32) | |
8700 | goto unsupp; | |
8701 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
8702 | break; |
8703 | ||
dd93cd0a AM |
8704 | case elfcpp::R_POWERPC_PLT32: |
8705 | case elfcpp::R_POWERPC_PLTREL32: | |
8706 | case elfcpp::R_POWERPC_PLT16_LO: | |
8707 | case elfcpp::R_POWERPC_PLT16_HI: | |
8708 | case elfcpp::R_POWERPC_PLT16_HA: | |
8709 | case elfcpp::R_PPC_SDAREL16: | |
8710 | case elfcpp::R_POWERPC_ADDR30: | |
8711 | case elfcpp::R_PPC64_PLT64: | |
8712 | case elfcpp::R_PPC64_PLTREL64: | |
8713 | case elfcpp::R_PPC64_PLTGOT16: | |
8714 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
8715 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
8716 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
8717 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
8718 | case elfcpp::R_PPC64_PLTGOT16_DS: | |
8719 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
8720 | case elfcpp::R_PPC_EMB_RELSDA: |
8721 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 8722 | default: |
dd93cd0a | 8723 | unsupp: |
42cacb20 DE |
8724 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
8725 | _("unsupported reloc %u"), | |
8726 | r_type); | |
8727 | break; | |
8728 | } | |
a680de9a PB |
8729 | |
8730 | if (maybe_dq_reloc) | |
8731 | { | |
8732 | if (insn == 0) | |
8733 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
8734 | ||
8735 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
8736 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
8737 | && (insn & 3) == 1)) | |
8738 | status = Reloc::addr16_dq(view, value, overflow); | |
8739 | else if (size == 64 | |
8740 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
8741 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
8742 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
8743 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
8744 | status = Reloc::addr16_ds(view, value, overflow); | |
8745 | else | |
8746 | status = Reloc::addr16(view, value, overflow); | |
8747 | } | |
8748 | ||
0cfb0717 | 8749 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
8750 | && (has_stub_value |
8751 | || !(gsym != NULL | |
282c9750 | 8752 | && gsym->is_undefined() |
3ffaac20 | 8753 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
8754 | { |
8755 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8756 | _("relocation overflow")); | |
8757 | if (has_stub_value) | |
8758 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
8759 | } | |
42cacb20 DE |
8760 | |
8761 | return true; | |
8762 | } | |
8763 | ||
42cacb20 DE |
8764 | // Relocate section data. |
8765 | ||
8766 | template<int size, bool big_endian> | |
8767 | void | |
8768 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
8769 | const Relocate_info<size, big_endian>* relinfo, |
8770 | unsigned int sh_type, | |
8771 | const unsigned char* prelocs, | |
8772 | size_t reloc_count, | |
8773 | Output_section* output_section, | |
8774 | bool needs_special_offset_handling, | |
8775 | unsigned char* view, | |
c9269dff | 8776 | Address address, |
d83ce4e3 AM |
8777 | section_size_type view_size, |
8778 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
8779 | { |
8780 | typedef Target_powerpc<size, big_endian> Powerpc; | |
8781 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
8782 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
8783 | Powerpc_comdat_behavior; | |
4d625b70 CC |
8784 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8785 | Classify_reloc; | |
42cacb20 DE |
8786 | |
8787 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8788 | ||
4d625b70 CC |
8789 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
8790 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
8791 | relinfo, |
8792 | this, | |
8793 | prelocs, | |
8794 | reloc_count, | |
8795 | output_section, | |
8796 | needs_special_offset_handling, | |
8797 | view, | |
8798 | address, | |
364c7fa5 ILT |
8799 | view_size, |
8800 | reloc_symbol_changes); | |
42cacb20 DE |
8801 | } |
8802 | ||
4d625b70 | 8803 | template<int size, bool big_endian> |
cf43a2fe | 8804 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 8805 | { |
cf43a2fe | 8806 | public: |
0e123f69 AM |
8807 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
8808 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
8809 | static const int sh_type = elfcpp::SHT_RELA; |
8810 | ||
8811 | // Return the symbol referred to by the relocation. | |
8812 | static inline unsigned int | |
8813 | get_r_sym(const Reltype* reloc) | |
8814 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
8815 | ||
8816 | // Return the type of the relocation. | |
8817 | static inline unsigned int | |
8818 | get_r_type(const Reltype* reloc) | |
8819 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
8820 | ||
cf43a2fe AM |
8821 | // Return the strategy to use for a local symbol which is not a |
8822 | // section symbol, given the relocation type. | |
8823 | inline Relocatable_relocs::Reloc_strategy | |
8824 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
8825 | { | |
8826 | if (r_type == 0 && r_sym == 0) | |
8827 | return Relocatable_relocs::RELOC_DISCARD; | |
8828 | return Relocatable_relocs::RELOC_COPY; | |
8829 | } | |
8830 | ||
8831 | // Return the strategy to use for a local symbol which is a section | |
8832 | // symbol, given the relocation type. | |
8833 | inline Relocatable_relocs::Reloc_strategy | |
8834 | local_section_strategy(unsigned int, Relobj*) | |
8835 | { | |
8836 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
8837 | } | |
8838 | ||
8839 | // Return the strategy to use for a global symbol, given the | |
8840 | // relocation type, the object, and the symbol index. | |
8841 | inline Relocatable_relocs::Reloc_strategy | |
8842 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
8843 | { | |
8844 | if (r_type == elfcpp::R_PPC_PLTREL24) | |
8845 | return Relocatable_relocs::RELOC_SPECIAL; | |
8846 | return Relocatable_relocs::RELOC_COPY; | |
8847 | } | |
8848 | }; | |
42cacb20 DE |
8849 | |
8850 | // Scan the relocs during a relocatable link. | |
8851 | ||
8852 | template<int size, bool big_endian> | |
8853 | void | |
8854 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
8855 | Symbol_table* symtab, |
8856 | Layout* layout, | |
8857 | Sized_relobj_file<size, big_endian>* object, | |
8858 | unsigned int data_shndx, | |
8859 | unsigned int sh_type, | |
8860 | const unsigned char* prelocs, | |
8861 | size_t reloc_count, | |
8862 | Output_section* output_section, | |
8863 | bool needs_special_offset_handling, | |
8864 | size_t local_symbol_count, | |
8865 | const unsigned char* plocal_symbols, | |
8866 | Relocatable_relocs* rr) | |
42cacb20 | 8867 | { |
4d625b70 CC |
8868 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
8869 | ||
42cacb20 DE |
8870 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8871 | ||
4d625b70 | 8872 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
8873 | symtab, |
8874 | layout, | |
8875 | object, | |
8876 | data_shndx, | |
8877 | prelocs, | |
8878 | reloc_count, | |
8879 | output_section, | |
8880 | needs_special_offset_handling, | |
8881 | local_symbol_count, | |
8882 | plocal_symbols, | |
8883 | rr); | |
8884 | } | |
8885 | ||
4d625b70 CC |
8886 | // Scan the relocs for --emit-relocs. |
8887 | ||
8888 | template<int size, bool big_endian> | |
8889 | void | |
8890 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
8891 | Symbol_table* symtab, | |
8892 | Layout* layout, | |
8893 | Sized_relobj_file<size, big_endian>* object, | |
8894 | unsigned int data_shndx, | |
8895 | unsigned int sh_type, | |
8896 | const unsigned char* prelocs, | |
8897 | size_t reloc_count, | |
8898 | Output_section* output_section, | |
8899 | bool needs_special_offset_handling, | |
8900 | size_t local_symbol_count, | |
8901 | const unsigned char* plocal_syms, | |
8902 | Relocatable_relocs* rr) | |
8903 | { | |
8904 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8905 | Classify_reloc; | |
8906 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
8907 | Emit_relocs_strategy; | |
8908 | ||
8909 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8910 | ||
8911 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
8912 | symtab, | |
8913 | layout, | |
8914 | object, | |
8915 | data_shndx, | |
8916 | prelocs, | |
8917 | reloc_count, | |
8918 | output_section, | |
8919 | needs_special_offset_handling, | |
8920 | local_symbol_count, | |
8921 | plocal_syms, | |
8922 | rr); | |
8923 | } | |
8924 | ||
7404fe1b | 8925 | // Emit relocations for a section. |
dd93cd0a AM |
8926 | // This is a modified version of the function by the same name in |
8927 | // target-reloc.h. Using relocate_special_relocatable for | |
8928 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
8929 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
8930 | |
8931 | template<int size, bool big_endian> | |
8932 | void | |
7404fe1b | 8933 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
8934 | const Relocate_info<size, big_endian>* relinfo, |
8935 | unsigned int sh_type, | |
8936 | const unsigned char* prelocs, | |
8937 | size_t reloc_count, | |
8938 | Output_section* output_section, | |
62fe925a | 8939 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 8940 | unsigned char*, |
dd93cd0a | 8941 | Address view_address, |
cf43a2fe | 8942 | section_size_type, |
42cacb20 DE |
8943 | unsigned char* reloc_view, |
8944 | section_size_type reloc_view_size) | |
8945 | { | |
8946 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8947 | ||
0e123f69 AM |
8948 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
8949 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
8950 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
8951 | // Offset from start of insn to d-field reloc. |
8952 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
8953 | |
8954 | Powerpc_relobj<size, big_endian>* const object | |
8955 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
8956 | const unsigned int local_count = object->local_symbol_count(); | |
8957 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 8958 | Address got2_addend = 0; |
cf43a2fe | 8959 | if (got2_shndx != 0) |
c9269dff AM |
8960 | { |
8961 | got2_addend = object->get_output_section_offset(got2_shndx); | |
8962 | gold_assert(got2_addend != invalid_address); | |
8963 | } | |
cf43a2fe AM |
8964 | |
8965 | unsigned char* pwrite = reloc_view; | |
7404fe1b | 8966 | bool zap_next = false; |
cf43a2fe AM |
8967 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
8968 | { | |
91a65d2f | 8969 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
8970 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
8971 | continue; | |
8972 | ||
8973 | Reltype reloc(prelocs); | |
8974 | Reltype_write reloc_write(pwrite); | |
8975 | ||
7404fe1b | 8976 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 8977 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
8978 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
8979 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
8980 | const unsigned int orig_r_sym = r_sym; | |
8981 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
8982 | = reloc.get_r_addend(); | |
8983 | const Symbol* gsym = NULL; | |
8984 | ||
8985 | if (zap_next) | |
8986 | { | |
8987 | // We could arrange to discard these and other relocs for | |
8988 | // tls optimised sequences in the strategy methods, but for | |
8989 | // now do as BFD ld does. | |
8990 | r_type = elfcpp::R_POWERPC_NONE; | |
8991 | zap_next = false; | |
8992 | } | |
cf43a2fe AM |
8993 | |
8994 | // Get the new symbol index. | |
9215b98b | 8995 | Output_section* os = NULL; |
cf43a2fe AM |
8996 | if (r_sym < local_count) |
8997 | { | |
8998 | switch (strategy) | |
8999 | { | |
9000 | case Relocatable_relocs::RELOC_COPY: | |
9001 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 9002 | if (r_sym != 0) |
dd93cd0a | 9003 | { |
7404fe1b AM |
9004 | r_sym = object->symtab_index(r_sym); |
9005 | gold_assert(r_sym != -1U); | |
dd93cd0a | 9006 | } |
cf43a2fe AM |
9007 | break; |
9008 | ||
9009 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
9010 | { | |
9011 | // We are adjusting a section symbol. We need to find | |
9012 | // the symbol table index of the section symbol for | |
9013 | // the output section corresponding to input section | |
9014 | // in which this symbol is defined. | |
9015 | gold_assert(r_sym < local_count); | |
9016 | bool is_ordinary; | |
9017 | unsigned int shndx = | |
9018 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
9019 | gold_assert(is_ordinary); | |
9215b98b | 9020 | os = object->output_section(shndx); |
cf43a2fe AM |
9021 | gold_assert(os != NULL); |
9022 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 9023 | r_sym = os->symtab_index(); |
cf43a2fe AM |
9024 | } |
9025 | break; | |
9026 | ||
9027 | default: | |
9028 | gold_unreachable(); | |
9029 | } | |
9030 | } | |
9031 | else | |
9032 | { | |
7404fe1b | 9033 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
9034 | gold_assert(gsym != NULL); |
9035 | if (gsym->is_forwarder()) | |
9036 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
9037 | ||
9038 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 9039 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
9040 | } |
9041 | ||
9042 | // Get the new offset--the location in the output section where | |
9043 | // this relocation should be applied. | |
cf43a2fe | 9044 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9045 | offset += offset_in_output_section; |
cf43a2fe AM |
9046 | else |
9047 | { | |
c9269dff AM |
9048 | section_offset_type sot_offset = |
9049 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 9050 | section_offset_type new_sot_offset = |
c9269dff AM |
9051 | output_section->output_offset(object, relinfo->data_shndx, |
9052 | sot_offset); | |
cf43a2fe | 9053 | gold_assert(new_sot_offset != -1); |
7404fe1b | 9054 | offset = new_sot_offset; |
cf43a2fe AM |
9055 | } |
9056 | ||
dd93cd0a AM |
9057 | // In an object file, r_offset is an offset within the section. |
9058 | // In an executable or dynamic object, generated by | |
9059 | // --emit-relocs, r_offset is an absolute address. | |
7404fe1b | 9060 | if (!parameters->options().relocatable()) |
dd93cd0a | 9061 | { |
7404fe1b | 9062 | offset += view_address; |
dd93cd0a | 9063 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 9064 | offset -= offset_in_output_section; |
dd93cd0a AM |
9065 | } |
9066 | ||
cf43a2fe | 9067 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
9068 | if (strategy == Relocatable_relocs::RELOC_COPY) |
9069 | ; | |
9070 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
9071 | { | |
7404fe1b | 9072 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
9215b98b AM |
9073 | gold_assert(os != NULL); |
9074 | addend = psymval->value(object, addend) - os->address(); | |
cf43a2fe AM |
9075 | } |
9076 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
9077 | { | |
e3a7574e AM |
9078 | if (size == 32) |
9079 | { | |
9080 | if (addend >= 32768) | |
9081 | addend += got2_addend; | |
9082 | } | |
9083 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
9084 | { | |
9085 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 9086 | addend -= d_offset; |
e3a7574e AM |
9087 | } |
9088 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
9089 | { | |
9090 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 9091 | addend -= d_offset + 4; |
e3a7574e | 9092 | } |
cf43a2fe AM |
9093 | } |
9094 | else | |
9095 | gold_unreachable(); | |
9096 | ||
7404fe1b AM |
9097 | if (!parameters->options().relocatable()) |
9098 | { | |
9099 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9100 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
9101 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
9102 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
9103 | { | |
9104 | // First instruction of a global dynamic sequence, | |
9105 | // arg setup insn. | |
9106 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9107 | switch (this->optimize_tls_gd(final)) | |
9108 | { | |
9109 | case tls::TLSOPT_TO_IE: | |
9110 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
9111 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
9112 | break; | |
9113 | case tls::TLSOPT_TO_LE: | |
9114 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9115 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9116 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9117 | else | |
9118 | { | |
9119 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9120 | offset -= d_offset; |
7404fe1b AM |
9121 | } |
9122 | break; | |
9123 | default: | |
9124 | break; | |
9125 | } | |
9126 | } | |
9127 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9128 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
9129 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
9130 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
9131 | { | |
9132 | // First instruction of a local dynamic sequence, | |
9133 | // arg setup insn. | |
9134 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9135 | { | |
9136 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9137 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
9138 | { | |
9139 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9140 | const Output_section* os = relinfo->layout->tls_segment() | |
9141 | ->first_section(); | |
9142 | gold_assert(os != NULL); | |
9143 | gold_assert(os->needs_symtab_index()); | |
9144 | r_sym = os->symtab_index(); | |
9145 | addend = dtp_offset; | |
9146 | } | |
9147 | else | |
9148 | { | |
9149 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9150 | offset -= d_offset; |
7404fe1b AM |
9151 | } |
9152 | } | |
9153 | } | |
9154 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9155 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
9156 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
9157 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
9158 | { | |
9159 | // First instruction of initial exec sequence. | |
9160 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9161 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9162 | { | |
9163 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9164 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
9165 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9166 | else | |
9167 | { | |
9168 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 9169 | offset -= d_offset; |
7404fe1b AM |
9170 | } |
9171 | } | |
9172 | } | |
9173 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
9174 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
9175 | { | |
9176 | // Second instruction of a global dynamic sequence, | |
9177 | // the __tls_get_addr call | |
9178 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9179 | switch (this->optimize_tls_gd(final)) | |
9180 | { | |
9181 | case tls::TLSOPT_TO_IE: | |
9182 | r_type = elfcpp::R_POWERPC_NONE; | |
9183 | zap_next = true; | |
9184 | break; | |
9185 | case tls::TLSOPT_TO_LE: | |
9186 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9187 | offset += d_offset; |
7404fe1b AM |
9188 | zap_next = true; |
9189 | break; | |
9190 | default: | |
9191 | break; | |
9192 | } | |
9193 | } | |
9194 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
9195 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
9196 | { | |
9197 | // Second instruction of a local dynamic sequence, | |
9198 | // the __tls_get_addr call | |
9199 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
9200 | { | |
9201 | const Output_section* os = relinfo->layout->tls_segment() | |
9202 | ->first_section(); | |
9203 | gold_assert(os != NULL); | |
9204 | gold_assert(os->needs_symtab_index()); | |
9205 | r_sym = os->symtab_index(); | |
9206 | addend = dtp_offset; | |
9207 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9208 | offset += d_offset; |
7404fe1b AM |
9209 | zap_next = true; |
9210 | } | |
9211 | } | |
9212 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
9213 | { | |
9214 | // Second instruction of an initial exec sequence | |
9215 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9216 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
9217 | { | |
9218 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9219 | offset += d_offset; |
7404fe1b AM |
9220 | } |
9221 | } | |
9222 | } | |
9223 | ||
9224 | reloc_write.put_r_offset(offset); | |
9225 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
9226 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
9227 | |
9228 | pwrite += reloc_size; | |
9229 | } | |
9230 | ||
9231 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
9232 | == reloc_view_size); | |
42cacb20 DE |
9233 | } |
9234 | ||
ec661b9d | 9235 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
9236 | // treatment. This is how we support equality comparisons of function |
9237 | // pointers across shared library boundaries, as described in the | |
9238 | // processor specific ABI supplement. | |
9239 | ||
9240 | template<int size, bool big_endian> | |
9241 | uint64_t | |
9242 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
9243 | { | |
cf43a2fe AM |
9244 | if (size == 32) |
9245 | { | |
9246 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
9247 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9248 | p != this->stub_tables_.end(); | |
9249 | ++p) | |
9250 | { | |
9251 | Address off = (*p)->find_plt_call_entry(gsym); | |
9252 | if (off != invalid_address) | |
9253 | return (*p)->stub_address() + off; | |
9254 | } | |
c9824451 | 9255 | } |
9055360d AM |
9256 | else if (this->abiversion() >= 2) |
9257 | { | |
faa2211d AM |
9258 | Address off = this->glink_section()->find_global_entry(gsym); |
9259 | if (off != invalid_address) | |
9055360d AM |
9260 | return this->glink_section()->global_entry_address() + off; |
9261 | } | |
ec661b9d | 9262 | gold_unreachable(); |
c9824451 AM |
9263 | } |
9264 | ||
9265 | // Return the PLT address to use for a local symbol. | |
9266 | template<int size, bool big_endian> | |
9267 | uint64_t | |
9268 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
9269 | const Relobj* object, | |
9270 | unsigned int symndx) const | |
9271 | { | |
9272 | if (size == 32) | |
9273 | { | |
9274 | const Sized_relobj<size, big_endian>* relobj | |
9275 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
9276 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9277 | p != this->stub_tables_.end(); | |
9278 | ++p) | |
9279 | { | |
9280 | Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(), | |
9281 | symndx); | |
9282 | if (off != invalid_address) | |
9283 | return (*p)->stub_address() + off; | |
9284 | } | |
c9824451 | 9285 | } |
ec661b9d | 9286 | gold_unreachable(); |
c9824451 AM |
9287 | } |
9288 | ||
9289 | // Return the PLT address to use for a global symbol. | |
9290 | template<int size, bool big_endian> | |
9291 | uint64_t | |
9292 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
9293 | const Symbol* gsym) const | |
9294 | { | |
9295 | if (size == 32) | |
9296 | { | |
ec661b9d AM |
9297 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
9298 | p != this->stub_tables_.end(); | |
9299 | ++p) | |
9300 | { | |
9301 | Address off = (*p)->find_plt_call_entry(gsym); | |
9302 | if (off != invalid_address) | |
9303 | return (*p)->stub_address() + off; | |
9304 | } | |
cf43a2fe | 9305 | } |
9055360d AM |
9306 | else if (this->abiversion() >= 2) |
9307 | { | |
faa2211d AM |
9308 | Address off = this->glink_section()->find_global_entry(gsym); |
9309 | if (off != invalid_address) | |
9055360d AM |
9310 | return this->glink_section()->global_entry_address() + off; |
9311 | } | |
ec661b9d | 9312 | gold_unreachable(); |
42cacb20 DE |
9313 | } |
9314 | ||
bd73a62d AM |
9315 | // Return the offset to use for the GOT_INDX'th got entry which is |
9316 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
9317 | template<int size, bool big_endian> | |
9318 | int64_t | |
9319 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
9320 | const Relobj* object, | |
9321 | unsigned int symndx, | |
9322 | unsigned int got_indx) const | |
9323 | { | |
9324 | const Powerpc_relobj<size, big_endian>* ppc_object | |
9325 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
9326 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
9327 | { | |
9328 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9329 | got_type <= GOT_TYPE_TPREL; | |
9330 | got_type = Got_type(got_type + 1)) | |
9331 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
9332 | { | |
9333 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
9334 | if (got_type == GOT_TYPE_TLSGD) | |
9335 | off += size / 8; | |
9336 | if (off == got_indx * (size / 8)) | |
9337 | { | |
9338 | if (got_type == GOT_TYPE_TPREL) | |
9339 | return -tp_offset; | |
9340 | else | |
9341 | return -dtp_offset; | |
9342 | } | |
9343 | } | |
9344 | } | |
9345 | gold_unreachable(); | |
9346 | } | |
9347 | ||
9348 | // Return the offset to use for the GOT_INDX'th got entry which is | |
9349 | // for global tls symbol GSYM. | |
9350 | template<int size, bool big_endian> | |
9351 | int64_t | |
9352 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
9353 | Symbol* gsym, | |
9354 | unsigned int got_indx) const | |
9355 | { | |
9356 | if (gsym->type() == elfcpp::STT_TLS) | |
9357 | { | |
9358 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
9359 | got_type <= GOT_TYPE_TPREL; | |
9360 | got_type = Got_type(got_type + 1)) | |
9361 | if (gsym->has_got_offset(got_type)) | |
9362 | { | |
9363 | unsigned int off = gsym->got_offset(got_type); | |
9364 | if (got_type == GOT_TYPE_TLSGD) | |
9365 | off += size / 8; | |
9366 | if (off == got_indx * (size / 8)) | |
9367 | { | |
9368 | if (got_type == GOT_TYPE_TPREL) | |
9369 | return -tp_offset; | |
9370 | else | |
9371 | return -dtp_offset; | |
9372 | } | |
9373 | } | |
9374 | } | |
9375 | gold_unreachable(); | |
9376 | } | |
9377 | ||
42cacb20 DE |
9378 | // The selector for powerpc object files. |
9379 | ||
9380 | template<int size, bool big_endian> | |
9381 | class Target_selector_powerpc : public Target_selector | |
9382 | { | |
9383 | public: | |
9384 | Target_selector_powerpc() | |
edc27beb AM |
9385 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
9386 | size, big_endian, | |
03ef7571 ILT |
9387 | (size == 64 |
9388 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
9389 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
9390 | (size == 64 | |
9391 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
9392 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
9393 | { } |
9394 | ||
2e702c99 RM |
9395 | virtual Target* |
9396 | do_instantiate_target() | |
7f055c20 | 9397 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
9398 | }; |
9399 | ||
9400 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
9401 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
9402 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
9403 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
9404 | ||
decdd3bc AM |
9405 | // Instantiate these constants for -O0 |
9406 | template<int size, bool big_endian> | |
9407 | const int Output_data_glink<size, big_endian>::pltresolve_size; | |
9408 | template<int size, bool big_endian> | |
9055360d AM |
9409 | const typename Output_data_glink<size, big_endian>::Address |
9410 | Output_data_glink<size, big_endian>::invalid_address; | |
9411 | template<int size, bool big_endian> | |
decdd3bc AM |
9412 | const typename Stub_table<size, big_endian>::Address |
9413 | Stub_table<size, big_endian>::invalid_address; | |
9414 | template<int size, bool big_endian> | |
9415 | const typename Target_powerpc<size, big_endian>::Address | |
9416 | Target_powerpc<size, big_endian>::invalid_address; | |
9417 | ||
42cacb20 | 9418 | } // End anonymous namespace. |