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42cacb20 DE |
1 | // powerpc.cc -- powerpc target support for gold. |
2 | ||
219d1afa | 3 | // Copyright (C) 2008-2018 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" |
724436fc | 44 | #include "attributes.h" |
42cacb20 DE |
45 | |
46 | namespace | |
47 | { | |
48 | ||
49 | using namespace gold; | |
50 | ||
51 | template<int size, bool big_endian> | |
52 | class Output_data_plt_powerpc; | |
53 | ||
ec661b9d AM |
54 | template<int size, bool big_endian> |
55 | class Output_data_brlt_powerpc; | |
56 | ||
cf43a2fe AM |
57 | template<int size, bool big_endian> |
58 | class Output_data_got_powerpc; | |
59 | ||
60 | template<int size, bool big_endian> | |
61 | class Output_data_glink; | |
62 | ||
ec661b9d AM |
63 | template<int size, bool big_endian> |
64 | class Stub_table; | |
65 | ||
d49044c7 AM |
66 | template<int size, bool big_endian> |
67 | class Output_data_save_res; | |
68 | ||
a3e60ddb AM |
69 | template<int size, bool big_endian> |
70 | class Target_powerpc; | |
71 | ||
72 | struct Stub_table_owner | |
73 | { | |
dc60b26d AM |
74 | Stub_table_owner() |
75 | : output_section(NULL), owner(NULL) | |
76 | { } | |
77 | ||
a3e60ddb AM |
78 | Output_section* output_section; |
79 | const Output_section::Input_section* owner; | |
80 | }; | |
81 | ||
23cedd1d AM |
82 | inline bool is_branch_reloc(unsigned int); |
83 | ||
84 | template<int size> | |
85 | inline bool is_plt16_reloc(unsigned int); | |
4d9aa155 | 86 | |
590b87ff AM |
87 | // Counter incremented on every Powerpc_relobj constructed. |
88 | static uint32_t object_id = 0; | |
89 | ||
cf43a2fe AM |
90 | template<int size, bool big_endian> |
91 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> | |
92 | { | |
93 | public: | |
dd93cd0a | 94 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
e81fea4d AM |
95 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
96 | typedef Unordered_map<Address, Section_refs> Access_from; | |
c9269dff | 97 | |
cf43a2fe AM |
98 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
99 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
100 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
590b87ff AM |
101 | uniq_(object_id++), special_(0), relatoc_(0), toc_(0), |
102 | has_small_toc_reloc_(false), opd_valid_(false), | |
103 | e_flags_(ehdr.get_e_flags()), no_toc_opt_(), opd_ent_(), | |
724436fc AM |
104 | access_from_map_(), has14_(), stub_table_index_(), st_other_(), |
105 | attributes_section_data_(NULL) | |
b4f7960d AM |
106 | { |
107 | this->set_abiversion(0); | |
108 | } | |
cf43a2fe AM |
109 | |
110 | ~Powerpc_relobj() | |
724436fc | 111 | { delete this->attributes_section_data_; } |
cf43a2fe | 112 | |
b4f7960d AM |
113 | // Read the symbols then set up st_other vector. |
114 | void | |
115 | do_read_symbols(Read_symbols_data*); | |
116 | ||
5edad15d AM |
117 | // Arrange to always relocate .toc first. |
118 | virtual void | |
119 | do_relocate_sections( | |
120 | const Symbol_table* symtab, const Layout* layout, | |
121 | const unsigned char* pshdrs, Output_file* of, | |
122 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
123 | ||
124 | // The .toc section index. | |
125 | unsigned int | |
126 | toc_shndx() const | |
127 | { | |
128 | return this->toc_; | |
129 | } | |
130 | ||
131 | // Mark .toc entry at OFF as not optimizable. | |
132 | void | |
133 | set_no_toc_opt(Address off) | |
134 | { | |
135 | if (this->no_toc_opt_.empty()) | |
136 | this->no_toc_opt_.resize(this->section_size(this->toc_shndx()) | |
137 | / (size / 8)); | |
138 | off /= size / 8; | |
139 | if (off < this->no_toc_opt_.size()) | |
140 | this->no_toc_opt_[off] = true; | |
141 | } | |
142 | ||
143 | // Mark the entire .toc as not optimizable. | |
144 | void | |
145 | set_no_toc_opt() | |
146 | { | |
147 | this->no_toc_opt_.resize(1); | |
148 | this->no_toc_opt_[0] = true; | |
149 | } | |
150 | ||
151 | // Return true if code using the .toc entry at OFF should not be edited. | |
152 | bool | |
153 | no_toc_opt(Address off) const | |
154 | { | |
155 | if (this->no_toc_opt_.empty()) | |
156 | return false; | |
157 | off /= size / 8; | |
158 | if (off >= this->no_toc_opt_.size()) | |
159 | return true; | |
160 | return this->no_toc_opt_[off]; | |
161 | } | |
162 | ||
c9269dff | 163 | // The .got2 section shndx. |
cf43a2fe AM |
164 | unsigned int |
165 | got2_shndx() const | |
166 | { | |
167 | if (size == 32) | |
c9269dff | 168 | return this->special_; |
cf43a2fe AM |
169 | else |
170 | return 0; | |
171 | } | |
172 | ||
c9269dff AM |
173 | // The .opd section shndx. |
174 | unsigned int | |
175 | opd_shndx() const | |
176 | { | |
177 | if (size == 32) | |
178 | return 0; | |
179 | else | |
180 | return this->special_; | |
181 | } | |
182 | ||
183 | // Init OPD entry arrays. | |
184 | void | |
185 | init_opd(size_t opd_size) | |
186 | { | |
187 | size_t count = this->opd_ent_ndx(opd_size); | |
bfdfa4cd | 188 | this->opd_ent_.resize(count); |
c9269dff AM |
189 | } |
190 | ||
191 | // Return section and offset of function entry for .opd + R_OFF. | |
e81fea4d AM |
192 | unsigned int |
193 | get_opd_ent(Address r_off, Address* value = NULL) const | |
c9269dff AM |
194 | { |
195 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
196 | gold_assert(ndx < this->opd_ent_.size()); |
197 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
e81fea4d | 198 | if (value != NULL) |
bfdfa4cd AM |
199 | *value = this->opd_ent_[ndx].off; |
200 | return this->opd_ent_[ndx].shndx; | |
c9269dff AM |
201 | } |
202 | ||
203 | // Set section and offset of function entry for .opd + R_OFF. | |
204 | void | |
dd93cd0a | 205 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
c9269dff AM |
206 | { |
207 | size_t ndx = this->opd_ent_ndx(r_off); | |
bfdfa4cd AM |
208 | gold_assert(ndx < this->opd_ent_.size()); |
209 | this->opd_ent_[ndx].shndx = shndx; | |
210 | this->opd_ent_[ndx].off = value; | |
211 | } | |
212 | ||
213 | // Return discard flag for .opd + R_OFF. | |
214 | bool | |
215 | get_opd_discard(Address r_off) const | |
216 | { | |
217 | size_t ndx = this->opd_ent_ndx(r_off); | |
218 | gold_assert(ndx < this->opd_ent_.size()); | |
219 | return this->opd_ent_[ndx].discard; | |
220 | } | |
221 | ||
222 | // Set discard flag for .opd + R_OFF. | |
223 | void | |
224 | set_opd_discard(Address r_off) | |
225 | { | |
226 | size_t ndx = this->opd_ent_ndx(r_off); | |
227 | gold_assert(ndx < this->opd_ent_.size()); | |
228 | this->opd_ent_[ndx].discard = true; | |
c9269dff AM |
229 | } |
230 | ||
e81fea4d AM |
231 | bool |
232 | opd_valid() const | |
233 | { return this->opd_valid_; } | |
234 | ||
235 | void | |
236 | set_opd_valid() | |
237 | { this->opd_valid_ = true; } | |
238 | ||
c9269dff AM |
239 | // Examine .rela.opd to build info about function entry points. |
240 | void | |
241 | scan_opd_relocs(size_t reloc_count, | |
242 | const unsigned char* prelocs, | |
243 | const unsigned char* plocal_syms); | |
244 | ||
5edad15d AM |
245 | // Returns true if a code sequence loading a TOC entry can be |
246 | // converted into code calculating a TOC pointer relative offset. | |
247 | bool | |
248 | make_toc_relative(Target_powerpc<size, big_endian>* target, | |
249 | Address* value); | |
250 | ||
26a4e9cb AM |
251 | // Perform the Sized_relobj_file method, then set up opd info from |
252 | // .opd relocs. | |
c9269dff AM |
253 | void |
254 | do_read_relocs(Read_relocs_data*); | |
255 | ||
cf43a2fe AM |
256 | bool |
257 | do_find_special_sections(Read_symbols_data* sd); | |
258 | ||
ec4dbad3 AM |
259 | // Adjust this local symbol value. Return false if the symbol |
260 | // should be discarded from the output file. | |
261 | bool | |
262 | do_adjust_local_symbol(Symbol_value<size>* lv) const | |
263 | { | |
264 | if (size == 64 && this->opd_shndx() != 0) | |
265 | { | |
266 | bool is_ordinary; | |
267 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) | |
268 | return true; | |
269 | if (this->get_opd_discard(lv->input_value())) | |
270 | return false; | |
271 | } | |
272 | return true; | |
273 | } | |
274 | ||
6c77229c AM |
275 | Access_from* |
276 | access_from_map() | |
277 | { return &this->access_from_map_; } | |
278 | ||
279 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd | |
280 | // section at DST_OFF. | |
281 | void | |
efc6fa12 | 282 | add_reference(Relobj* src_obj, |
6c77229c AM |
283 | unsigned int src_indx, |
284 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
285 | { | |
286 | Section_id src_id(src_obj, src_indx); | |
287 | this->access_from_map_[dst_off].insert(src_id); | |
288 | } | |
289 | ||
290 | // Add a reference to the code section specified by the .opd entry | |
291 | // at DST_OFF | |
292 | void | |
293 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) | |
294 | { | |
295 | size_t ndx = this->opd_ent_ndx(dst_off); | |
296 | if (ndx >= this->opd_ent_.size()) | |
297 | this->opd_ent_.resize(ndx + 1); | |
298 | this->opd_ent_[ndx].gc_mark = true; | |
299 | } | |
300 | ||
301 | void | |
302 | process_gc_mark(Symbol_table* symtab) | |
303 | { | |
304 | for (size_t i = 0; i < this->opd_ent_.size(); i++) | |
305 | if (this->opd_ent_[i].gc_mark) | |
306 | { | |
307 | unsigned int shndx = this->opd_ent_[i].shndx; | |
4277535c | 308 | symtab->gc()->worklist().push_back(Section_id(this, shndx)); |
6c77229c AM |
309 | } |
310 | } | |
311 | ||
dd93cd0a AM |
312 | // Return offset in output GOT section that this object will use |
313 | // as a TOC pointer. Won't be just a constant with multi-toc support. | |
314 | Address | |
315 | toc_base_offset() const | |
316 | { return 0x8000; } | |
317 | ||
d8f5a274 AM |
318 | void |
319 | set_has_small_toc_reloc() | |
320 | { has_small_toc_reloc_ = true; } | |
321 | ||
322 | bool | |
323 | has_small_toc_reloc() const | |
324 | { return has_small_toc_reloc_; } | |
325 | ||
ec661b9d AM |
326 | void |
327 | set_has_14bit_branch(unsigned int shndx) | |
328 | { | |
329 | if (shndx >= this->has14_.size()) | |
330 | this->has14_.resize(shndx + 1); | |
331 | this->has14_[shndx] = true; | |
332 | } | |
333 | ||
334 | bool | |
335 | has_14bit_branch(unsigned int shndx) const | |
336 | { return shndx < this->has14_.size() && this->has14_[shndx]; } | |
337 | ||
338 | void | |
a3e60ddb | 339 | set_stub_table(unsigned int shndx, unsigned int stub_index) |
ec661b9d | 340 | { |
a3e60ddb | 341 | if (shndx >= this->stub_table_index_.size()) |
dc60b26d | 342 | this->stub_table_index_.resize(shndx + 1, -1); |
a3e60ddb | 343 | this->stub_table_index_[shndx] = stub_index; |
ec661b9d AM |
344 | } |
345 | ||
346 | Stub_table<size, big_endian>* | |
347 | stub_table(unsigned int shndx) | |
348 | { | |
a3e60ddb AM |
349 | if (shndx < this->stub_table_index_.size()) |
350 | { | |
351 | Target_powerpc<size, big_endian>* target | |
352 | = static_cast<Target_powerpc<size, big_endian>*>( | |
353 | parameters->sized_target<size, big_endian>()); | |
354 | unsigned int indx = this->stub_table_index_[shndx]; | |
980d0cdd AM |
355 | if (indx < target->stub_tables().size()) |
356 | return target->stub_tables()[indx]; | |
a3e60ddb | 357 | } |
ec661b9d AM |
358 | return NULL; |
359 | } | |
360 | ||
a3e60ddb AM |
361 | void |
362 | clear_stub_table() | |
363 | { | |
364 | this->stub_table_index_.clear(); | |
365 | } | |
366 | ||
590b87ff AM |
367 | uint32_t |
368 | uniq() const | |
369 | { return this->uniq_; } | |
370 | ||
b4f7960d AM |
371 | int |
372 | abiversion() const | |
373 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
374 | ||
375 | // Set ABI version for input and output | |
376 | void | |
377 | set_abiversion(int ver); | |
378 | ||
7ee7ff70 AM |
379 | unsigned int |
380 | st_other (unsigned int symndx) const | |
381 | { | |
382 | return this->st_other_[symndx]; | |
383 | } | |
384 | ||
b4f7960d AM |
385 | unsigned int |
386 | ppc64_local_entry_offset(const Symbol* sym) const | |
387 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } | |
388 | ||
389 | unsigned int | |
390 | ppc64_local_entry_offset(unsigned int symndx) const | |
391 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } | |
392 | ||
724436fc AM |
393 | // The contents of the .gnu.attributes section if there is one. |
394 | const Attributes_section_data* | |
395 | attributes_section_data() const | |
396 | { return this->attributes_section_data_; } | |
397 | ||
cf43a2fe | 398 | private: |
bfdfa4cd AM |
399 | struct Opd_ent |
400 | { | |
401 | unsigned int shndx; | |
c6de8ed4 AM |
402 | bool discard : 1; |
403 | bool gc_mark : 1; | |
26a4e9cb | 404 | Address off; |
bfdfa4cd AM |
405 | }; |
406 | ||
407 | // Return index into opd_ent_ array for .opd entry at OFF. | |
408 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes | |
409 | // apart when the language doesn't use the last 8-byte word, the | |
410 | // environment pointer. Thus dividing the entry section offset by | |
411 | // 16 will give an index into opd_ent_ that works for either layout | |
412 | // of .opd. (It leaves some elements of the vector unused when .opd | |
413 | // entries are spaced 24 bytes apart, but we don't know the spacing | |
414 | // until relocations are processed, and in any case it is possible | |
415 | // for an object to have some entries spaced 16 bytes apart and | |
416 | // others 24 bytes apart.) | |
c9269dff AM |
417 | size_t |
418 | opd_ent_ndx(size_t off) const | |
419 | { return off >> 4;} | |
420 | ||
590b87ff AM |
421 | // Per object unique identifier |
422 | uint32_t uniq_; | |
423 | ||
c9269dff AM |
424 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. |
425 | unsigned int special_; | |
bfdfa4cd | 426 | |
5edad15d AM |
427 | // For 64-bit the .rela.toc and .toc section shdnx. |
428 | unsigned int relatoc_; | |
429 | unsigned int toc_; | |
430 | ||
d8f5a274 AM |
431 | // For 64-bit, whether this object uses small model relocs to access |
432 | // the toc. | |
433 | bool has_small_toc_reloc_; | |
434 | ||
bfdfa4cd AM |
435 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
436 | // vector is valid. The flag could be made atomic and set in | |
437 | // do_read_relocs with memory_order_release and then tested with | |
438 | // memory_order_acquire, potentially resulting in fewer entries in | |
439 | // access_from_map_. | |
440 | bool opd_valid_; | |
441 | ||
590b87ff AM |
442 | // Header e_flags |
443 | elfcpp::Elf_Word e_flags_; | |
444 | ||
445 | // For 64-bit, an array with one entry per 64-bit word in the .toc | |
446 | // section, set if accesses using that word cannot be optimised. | |
447 | std::vector<bool> no_toc_opt_; | |
448 | ||
c9269dff AM |
449 | // The first 8-byte word of an OPD entry gives the address of the |
450 | // entry point of the function. Relocatable object files have a | |
bfdfa4cd | 451 | // relocation on this word. The following vector records the |
c9269dff | 452 | // section and offset specified by these relocations. |
bfdfa4cd AM |
453 | std::vector<Opd_ent> opd_ent_; |
454 | ||
e81fea4d | 455 | // References made to this object's .opd section when running |
bfdfa4cd AM |
456 | // gc_process_relocs for another object, before the opd_ent_ vector |
457 | // is valid for this object. | |
e81fea4d | 458 | Access_from access_from_map_; |
ec661b9d AM |
459 | |
460 | // Whether input section has a 14-bit branch reloc. | |
461 | std::vector<bool> has14_; | |
462 | ||
463 | // The stub table to use for a given input section. | |
a3e60ddb | 464 | std::vector<unsigned int> stub_table_index_; |
b4f7960d | 465 | |
b4f7960d AM |
466 | // ELF st_other field for local symbols. |
467 | std::vector<unsigned char> st_other_; | |
724436fc AM |
468 | |
469 | // Object attributes if there is a .gnu.attributes section. | |
470 | Attributes_section_data* attributes_section_data_; | |
cf43a2fe AM |
471 | }; |
472 | ||
dc3714f3 AM |
473 | template<int size, bool big_endian> |
474 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> | |
475 | { | |
476 | public: | |
477 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
478 | ||
479 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, | |
480 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
481 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), | |
724436fc AM |
482 | opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_(), |
483 | attributes_section_data_(NULL) | |
b4f7960d AM |
484 | { |
485 | this->set_abiversion(0); | |
486 | } | |
dc3714f3 AM |
487 | |
488 | ~Powerpc_dynobj() | |
724436fc | 489 | { delete this->attributes_section_data_; } |
dc3714f3 AM |
490 | |
491 | // Call Sized_dynobj::do_read_symbols to read the symbols then | |
492 | // read .opd from a dynamic object, filling in opd_ent_ vector, | |
493 | void | |
494 | do_read_symbols(Read_symbols_data*); | |
495 | ||
496 | // The .opd section shndx. | |
497 | unsigned int | |
498 | opd_shndx() const | |
499 | { | |
500 | return this->opd_shndx_; | |
501 | } | |
502 | ||
503 | // The .opd section address. | |
504 | Address | |
505 | opd_address() const | |
506 | { | |
507 | return this->opd_address_; | |
508 | } | |
509 | ||
510 | // Init OPD entry arrays. | |
511 | void | |
512 | init_opd(size_t opd_size) | |
513 | { | |
514 | size_t count = this->opd_ent_ndx(opd_size); | |
515 | this->opd_ent_.resize(count); | |
516 | } | |
517 | ||
518 | // Return section and offset of function entry for .opd + R_OFF. | |
519 | unsigned int | |
520 | get_opd_ent(Address r_off, Address* value = NULL) const | |
521 | { | |
522 | size_t ndx = this->opd_ent_ndx(r_off); | |
523 | gold_assert(ndx < this->opd_ent_.size()); | |
524 | gold_assert(this->opd_ent_[ndx].shndx != 0); | |
525 | if (value != NULL) | |
526 | *value = this->opd_ent_[ndx].off; | |
527 | return this->opd_ent_[ndx].shndx; | |
528 | } | |
529 | ||
530 | // Set section and offset of function entry for .opd + R_OFF. | |
531 | void | |
532 | set_opd_ent(Address r_off, unsigned int shndx, Address value) | |
533 | { | |
534 | size_t ndx = this->opd_ent_ndx(r_off); | |
535 | gold_assert(ndx < this->opd_ent_.size()); | |
536 | this->opd_ent_[ndx].shndx = shndx; | |
537 | this->opd_ent_[ndx].off = value; | |
538 | } | |
539 | ||
b4f7960d AM |
540 | int |
541 | abiversion() const | |
542 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } | |
543 | ||
544 | // Set ABI version for input and output. | |
545 | void | |
546 | set_abiversion(int ver); | |
547 | ||
724436fc AM |
548 | // The contents of the .gnu.attributes section if there is one. |
549 | const Attributes_section_data* | |
550 | attributes_section_data() const | |
551 | { return this->attributes_section_data_; } | |
552 | ||
dc3714f3 AM |
553 | private: |
554 | // Used to specify extent of executable sections. | |
555 | struct Sec_info | |
556 | { | |
557 | Sec_info(Address start_, Address len_, unsigned int shndx_) | |
558 | : start(start_), len(len_), shndx(shndx_) | |
559 | { } | |
560 | ||
561 | bool | |
562 | operator<(const Sec_info& that) const | |
563 | { return this->start < that.start; } | |
564 | ||
565 | Address start; | |
566 | Address len; | |
567 | unsigned int shndx; | |
568 | }; | |
569 | ||
570 | struct Opd_ent | |
571 | { | |
572 | unsigned int shndx; | |
573 | Address off; | |
574 | }; | |
575 | ||
576 | // Return index into opd_ent_ array for .opd entry at OFF. | |
577 | size_t | |
578 | opd_ent_ndx(size_t off) const | |
579 | { return off >> 4;} | |
580 | ||
581 | // For 64-bit the .opd section shndx and address. | |
582 | unsigned int opd_shndx_; | |
583 | Address opd_address_; | |
584 | ||
590b87ff AM |
585 | // Header e_flags |
586 | elfcpp::Elf_Word e_flags_; | |
587 | ||
dc3714f3 AM |
588 | // The first 8-byte word of an OPD entry gives the address of the |
589 | // entry point of the function. Records the section and offset | |
590 | // corresponding to the address. Note that in dynamic objects, | |
591 | // offset is *not* relative to the section. | |
592 | std::vector<Opd_ent> opd_ent_; | |
724436fc AM |
593 | |
594 | // Object attributes if there is a .gnu.attributes section. | |
595 | Attributes_section_data* attributes_section_data_; | |
dc3714f3 AM |
596 | }; |
597 | ||
5edad15d AM |
598 | // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the |
599 | // base class will emit. | |
600 | ||
601 | template<int sh_type, int size, bool big_endian> | |
602 | class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
603 | { | |
604 | public: | |
605 | Powerpc_copy_relocs() | |
606 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY) | |
607 | { } | |
608 | ||
609 | // Emit any saved relocations which turn out to be needed. This is | |
610 | // called after all the relocs have been scanned. | |
611 | void | |
612 | emit(Output_data_reloc<sh_type, true, size, big_endian>*); | |
613 | }; | |
614 | ||
42cacb20 DE |
615 | template<int size, bool big_endian> |
616 | class Target_powerpc : public Sized_target<size, big_endian> | |
617 | { | |
618 | public: | |
d83ce4e3 AM |
619 | typedef |
620 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; | |
c9269dff | 621 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
dd93cd0a | 622 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
7e57d19e | 623 | typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc; |
c9269dff | 624 | static const Address invalid_address = static_cast<Address>(0) - 1; |
dd93cd0a AM |
625 | // Offset of tp and dtp pointers from start of TLS block. |
626 | static const Address tp_offset = 0x7000; | |
627 | static const Address dtp_offset = 0x8000; | |
42cacb20 DE |
628 | |
629 | Target_powerpc() | |
630 | : Sized_target<size, big_endian>(&powerpc_info), | |
2d7ad24e | 631 | got_(NULL), plt_(NULL), iplt_(NULL), lplt_(NULL), brlt_section_(NULL), |
5edad15d | 632 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
43819297 | 633 | tlsld_got_offset_(-1U), |
7e57d19e | 634 | stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(), |
7ee7ff70 AM |
635 | plt_thread_safe_(false), plt_localentry0_(false), |
636 | plt_localentry0_init_(false), has_localentry0_(false), | |
34e0882b | 637 | has_tls_get_addr_opt_(false), |
7ee7ff70 | 638 | relax_failed_(false), relax_fail_count_(0), |
34e0882b | 639 | stub_group_size_(0), savres_section_(0), |
724436fc AM |
640 | tls_get_addr_(NULL), tls_get_addr_opt_(NULL), |
641 | attributes_section_data_(NULL), | |
642 | last_fp_(NULL), last_ld_(NULL), last_vec_(NULL), last_struct_(NULL) | |
42cacb20 DE |
643 | { |
644 | } | |
645 | ||
2e702c99 | 646 | // Process the relocations to determine unreferenced sections for |
6d03d481 ST |
647 | // garbage collection. |
648 | void | |
ad0f2072 | 649 | gc_process_relocs(Symbol_table* symtab, |
2e702c99 RM |
650 | Layout* layout, |
651 | Sized_relobj_file<size, big_endian>* object, | |
652 | unsigned int data_shndx, | |
653 | unsigned int sh_type, | |
654 | const unsigned char* prelocs, | |
655 | size_t reloc_count, | |
656 | Output_section* output_section, | |
657 | bool needs_special_offset_handling, | |
658 | size_t local_symbol_count, | |
659 | const unsigned char* plocal_symbols); | |
6d03d481 | 660 | |
42cacb20 DE |
661 | // Scan the relocations to look for symbol adjustments. |
662 | void | |
ad0f2072 | 663 | scan_relocs(Symbol_table* symtab, |
42cacb20 | 664 | Layout* layout, |
6fa2a40b | 665 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
666 | unsigned int data_shndx, |
667 | unsigned int sh_type, | |
668 | const unsigned char* prelocs, | |
669 | size_t reloc_count, | |
670 | Output_section* output_section, | |
671 | bool needs_special_offset_handling, | |
672 | size_t local_symbol_count, | |
673 | const unsigned char* plocal_symbols); | |
921b5322 AM |
674 | |
675 | // Map input .toc section to output .got section. | |
676 | const char* | |
677 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const | |
678 | { | |
679 | if (size == 64 && strcmp(name, ".toc") == 0) | |
680 | { | |
681 | *plen = 4; | |
682 | return ".got"; | |
683 | } | |
684 | return NULL; | |
685 | } | |
686 | ||
f3a0ed29 AM |
687 | // Provide linker defined save/restore functions. |
688 | void | |
689 | define_save_restore_funcs(Layout*, Symbol_table*); | |
690 | ||
ec661b9d AM |
691 | // No stubs unless a final link. |
692 | bool | |
693 | do_may_relax() const | |
694 | { return !parameters->options().relocatable(); } | |
695 | ||
696 | bool | |
697 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
698 | ||
9d5781f8 AM |
699 | void |
700 | do_plt_fde_location(const Output_data*, unsigned char*, | |
701 | uint64_t*, off_t*) const; | |
702 | ||
ec661b9d AM |
703 | // Stash info about branches, for stub generation. |
704 | void | |
705 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, | |
706 | unsigned int data_shndx, Address r_offset, | |
707 | unsigned int r_type, unsigned int r_sym, Address addend) | |
708 | { | |
709 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); | |
710 | this->branch_info_.push_back(info); | |
711 | if (r_type == elfcpp::R_POWERPC_REL14 | |
712 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
713 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
714 | ppc_object->set_has_14bit_branch(data_shndx); | |
715 | } | |
716 | ||
7e57d19e AM |
717 | // Return whether the last branch is a plt call, and if so, mark the |
718 | // branch as having an R_PPC64_TOCSAVE. | |
719 | bool | |
720 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
721 | unsigned int data_shndx, Address r_offset, Symbol_table* symtab) | |
722 | { | |
723 | return (size == 64 | |
724 | && !this->branch_info_.empty() | |
725 | && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx, | |
726 | r_offset, this, symtab)); | |
727 | } | |
728 | ||
729 | // Say the given location, that of a nop in a function prologue with | |
730 | // an R_PPC64_TOCSAVE reloc, will be used to save r2. | |
731 | // R_PPC64_TOCSAVE relocs on nops following calls point at this nop. | |
732 | void | |
733 | add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object, | |
734 | unsigned int shndx, Address offset) | |
735 | { | |
736 | Symbol_location loc; | |
737 | loc.object = ppc_object; | |
738 | loc.shndx = shndx; | |
739 | loc.offset = offset; | |
740 | this->tocsave_loc_.insert(loc); | |
741 | } | |
742 | ||
743 | // Accessor | |
744 | const Tocsave_loc | |
745 | tocsave_loc() const | |
746 | { | |
747 | return this->tocsave_loc_; | |
748 | } | |
749 | ||
f43ba157 AM |
750 | void |
751 | do_define_standard_symbols(Symbol_table*, Layout*); | |
752 | ||
42cacb20 DE |
753 | // Finalize the sections. |
754 | void | |
f59f41f3 | 755 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
42cacb20 DE |
756 | |
757 | // Return the value to use for a dynamic which requires special | |
758 | // treatment. | |
759 | uint64_t | |
760 | do_dynsym_value(const Symbol*) const; | |
761 | ||
c9824451 AM |
762 | // Return the PLT address to use for a local symbol. |
763 | uint64_t | |
764 | do_plt_address_for_local(const Relobj*, unsigned int) const; | |
765 | ||
766 | // Return the PLT address to use for a global symbol. | |
767 | uint64_t | |
768 | do_plt_address_for_global(const Symbol*) const; | |
769 | ||
bd73a62d AM |
770 | // Return the offset to use for the GOT_INDX'th got entry which is |
771 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
772 | int64_t | |
773 | do_tls_offset_for_local(const Relobj* object, | |
774 | unsigned int symndx, | |
775 | unsigned int got_indx) const; | |
776 | ||
777 | // Return the offset to use for the GOT_INDX'th got entry which is | |
778 | // for global tls symbol GSYM. | |
779 | int64_t | |
780 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; | |
781 | ||
dc3714f3 AM |
782 | void |
783 | do_function_location(Symbol_location*) const; | |
784 | ||
4d9aa155 AM |
785 | bool |
786 | do_can_check_for_function_pointers() const | |
787 | { return true; } | |
788 | ||
bbec1a5d AM |
789 | // Adjust -fsplit-stack code which calls non-split-stack code. |
790 | void | |
791 | do_calls_non_split(Relobj* object, unsigned int shndx, | |
792 | section_offset_type fnoffset, section_size_type fnsize, | |
6e0813d3 | 793 | const unsigned char* prelocs, size_t reloc_count, |
bbec1a5d AM |
794 | unsigned char* view, section_size_type view_size, |
795 | std::string* from, std::string* to) const; | |
796 | ||
42cacb20 DE |
797 | // Relocate a section. |
798 | void | |
799 | relocate_section(const Relocate_info<size, big_endian>*, | |
800 | unsigned int sh_type, | |
801 | const unsigned char* prelocs, | |
802 | size_t reloc_count, | |
803 | Output_section* output_section, | |
804 | bool needs_special_offset_handling, | |
805 | unsigned char* view, | |
c9269dff | 806 | Address view_address, |
364c7fa5 ILT |
807 | section_size_type view_size, |
808 | const Reloc_symbol_changes*); | |
42cacb20 DE |
809 | |
810 | // Scan the relocs during a relocatable link. | |
811 | void | |
ad0f2072 | 812 | scan_relocatable_relocs(Symbol_table* symtab, |
42cacb20 | 813 | Layout* layout, |
6fa2a40b | 814 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
815 | unsigned int data_shndx, |
816 | unsigned int sh_type, | |
817 | const unsigned char* prelocs, | |
818 | size_t reloc_count, | |
819 | Output_section* output_section, | |
820 | bool needs_special_offset_handling, | |
821 | size_t local_symbol_count, | |
822 | const unsigned char* plocal_symbols, | |
823 | Relocatable_relocs*); | |
824 | ||
4d625b70 CC |
825 | // Scan the relocs for --emit-relocs. |
826 | void | |
827 | emit_relocs_scan(Symbol_table* symtab, | |
828 | Layout* layout, | |
829 | Sized_relobj_file<size, big_endian>* object, | |
830 | unsigned int data_shndx, | |
831 | unsigned int sh_type, | |
832 | const unsigned char* prelocs, | |
833 | size_t reloc_count, | |
834 | Output_section* output_section, | |
835 | bool needs_special_offset_handling, | |
836 | size_t local_symbol_count, | |
837 | const unsigned char* plocal_syms, | |
838 | Relocatable_relocs* rr); | |
839 | ||
7404fe1b | 840 | // Emit relocations for a section. |
42cacb20 | 841 | void |
7404fe1b AM |
842 | relocate_relocs(const Relocate_info<size, big_endian>*, |
843 | unsigned int sh_type, | |
844 | const unsigned char* prelocs, | |
845 | size_t reloc_count, | |
846 | Output_section* output_section, | |
62fe925a RM |
847 | typename elfcpp::Elf_types<size>::Elf_Off |
848 | offset_in_output_section, | |
7404fe1b AM |
849 | unsigned char*, |
850 | Address view_address, | |
851 | section_size_type, | |
852 | unsigned char* reloc_view, | |
853 | section_size_type reloc_view_size); | |
42cacb20 DE |
854 | |
855 | // Return whether SYM is defined by the ABI. | |
856 | bool | |
9c2d0ef9 | 857 | do_is_defined_by_abi(const Symbol* sym) const |
42cacb20 | 858 | { |
cf43a2fe | 859 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
42cacb20 DE |
860 | } |
861 | ||
862 | // Return the size of the GOT section. | |
863 | section_size_type | |
0e70b911 | 864 | got_size() const |
42cacb20 DE |
865 | { |
866 | gold_assert(this->got_ != NULL); | |
867 | return this->got_->data_size(); | |
868 | } | |
869 | ||
cf43a2fe AM |
870 | // Get the PLT section. |
871 | const Output_data_plt_powerpc<size, big_endian>* | |
872 | plt_section() const | |
873 | { | |
874 | gold_assert(this->plt_ != NULL); | |
875 | return this->plt_; | |
876 | } | |
877 | ||
e5d5f5ed AM |
878 | // Get the IPLT section. |
879 | const Output_data_plt_powerpc<size, big_endian>* | |
880 | iplt_section() const | |
881 | { | |
882 | gold_assert(this->iplt_ != NULL); | |
883 | return this->iplt_; | |
884 | } | |
885 | ||
2d7ad24e AM |
886 | // Get the LPLT section. |
887 | const Output_data_plt_powerpc<size, big_endian>* | |
888 | lplt_section() const | |
889 | { | |
890 | return this->lplt_; | |
891 | } | |
892 | ||
08be3224 AM |
893 | // Return the plt offset and section for the given global sym. |
894 | Address | |
895 | plt_off(const Symbol* gsym, | |
896 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
897 | { | |
898 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
899 | && gsym->can_use_relative_reloc(false)) | |
900 | *sec = this->iplt_section(); | |
901 | else | |
902 | *sec = this->plt_section(); | |
903 | return gsym->plt_offset(); | |
904 | } | |
905 | ||
906 | // Return the plt offset and section for the given local sym. | |
907 | Address | |
908 | plt_off(const Sized_relobj_file<size, big_endian>* relobj, | |
909 | unsigned int local_sym_index, | |
910 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
911 | { | |
2d7ad24e AM |
912 | const Symbol_value<size>* lsym = relobj->local_symbol(local_sym_index); |
913 | if (lsym->is_ifunc_symbol()) | |
914 | *sec = this->iplt_section(); | |
915 | else | |
916 | *sec = this->lplt_section(); | |
08be3224 AM |
917 | return relobj->local_plt_offset(local_sym_index); |
918 | } | |
919 | ||
cf43a2fe AM |
920 | // Get the .glink section. |
921 | const Output_data_glink<size, big_endian>* | |
922 | glink_section() const | |
923 | { | |
924 | gold_assert(this->glink_ != NULL); | |
925 | return this->glink_; | |
926 | } | |
927 | ||
9055360d AM |
928 | Output_data_glink<size, big_endian>* |
929 | glink_section() | |
930 | { | |
931 | gold_assert(this->glink_ != NULL); | |
932 | return this->glink_; | |
933 | } | |
934 | ||
9d5781f8 AM |
935 | bool has_glink() const |
936 | { return this->glink_ != NULL; } | |
937 | ||
cf43a2fe AM |
938 | // Get the GOT section. |
939 | const Output_data_got_powerpc<size, big_endian>* | |
940 | got_section() const | |
941 | { | |
942 | gold_assert(this->got_ != NULL); | |
943 | return this->got_; | |
944 | } | |
945 | ||
26a4e9cb AM |
946 | // Get the GOT section, creating it if necessary. |
947 | Output_data_got_powerpc<size, big_endian>* | |
948 | got_section(Symbol_table*, Layout*); | |
949 | ||
cf43a2fe AM |
950 | Object* |
951 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
952 | const elfcpp::Ehdr<size, big_endian>&); | |
953 | ||
0e70b911 CC |
954 | // Return the number of entries in the GOT. |
955 | unsigned int | |
956 | got_entry_count() const | |
957 | { | |
958 | if (this->got_ == NULL) | |
959 | return 0; | |
960 | return this->got_size() / (size / 8); | |
961 | } | |
962 | ||
963 | // Return the number of entries in the PLT. | |
964 | unsigned int | |
965 | plt_entry_count() const; | |
966 | ||
967 | // Return the offset of the first non-reserved PLT entry. | |
968 | unsigned int | |
b4f7960d AM |
969 | first_plt_entry_offset() const |
970 | { | |
971 | if (size == 32) | |
972 | return 0; | |
973 | if (this->abiversion() >= 2) | |
974 | return 16; | |
975 | return 24; | |
976 | } | |
0e70b911 CC |
977 | |
978 | // Return the size of each PLT entry. | |
979 | unsigned int | |
b4f7960d AM |
980 | plt_entry_size() const |
981 | { | |
982 | if (size == 32) | |
983 | return 4; | |
984 | if (this->abiversion() >= 2) | |
985 | return 8; | |
986 | return 24; | |
987 | } | |
0e70b911 | 988 | |
d49044c7 AM |
989 | Output_data_save_res<size, big_endian>* |
990 | savres_section() const | |
991 | { | |
992 | return this->savres_section_; | |
993 | } | |
994 | ||
e81fea4d AM |
995 | // Add any special sections for this symbol to the gc work list. |
996 | // For powerpc64, this adds the code section of a function | |
997 | // descriptor. | |
998 | void | |
999 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; | |
1000 | ||
1001 | // Handle target specific gc actions when adding a gc reference from | |
1002 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
1003 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
1004 | // section of a function descriptor. | |
1005 | void | |
1006 | do_gc_add_reference(Symbol_table* symtab, | |
efc6fa12 | 1007 | Relobj* src_obj, |
e81fea4d | 1008 | unsigned int src_shndx, |
efc6fa12 | 1009 | Relobj* dst_obj, |
e81fea4d AM |
1010 | unsigned int dst_shndx, |
1011 | Address dst_off) const; | |
1012 | ||
ec661b9d AM |
1013 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
1014 | const Stub_tables& | |
1015 | stub_tables() const | |
1016 | { return this->stub_tables_; } | |
1017 | ||
1018 | const Output_data_brlt_powerpc<size, big_endian>* | |
1019 | brlt_section() const | |
1020 | { return this->brlt_section_; } | |
1021 | ||
1022 | void | |
1023 | add_branch_lookup_table(Address to) | |
1024 | { | |
1025 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); | |
1026 | this->branch_lookup_table_.insert(std::make_pair(to, off)); | |
1027 | } | |
1028 | ||
1029 | Address | |
1030 | find_branch_lookup_table(Address to) | |
1031 | { | |
1032 | typename Branch_lookup_table::const_iterator p | |
1033 | = this->branch_lookup_table_.find(to); | |
1034 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; | |
1035 | } | |
1036 | ||
1037 | void | |
1038 | write_branch_lookup_table(unsigned char *oview) | |
1039 | { | |
1040 | for (typename Branch_lookup_table::const_iterator p | |
1041 | = this->branch_lookup_table_.begin(); | |
1042 | p != this->branch_lookup_table_.end(); | |
1043 | ++p) | |
1044 | { | |
4d5effb9 | 1045 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
ec661b9d AM |
1046 | } |
1047 | } | |
1048 | ||
590b87ff AM |
1049 | // Wrapper used after relax to define a local symbol in output data, |
1050 | // from the end if value < 0. | |
1051 | void | |
1052 | define_local(Symbol_table* symtab, const char* name, | |
1053 | Output_data* od, Address value, unsigned int symsize) | |
1054 | { | |
1055 | Symbol* sym | |
1056 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, | |
1057 | od, value, symsize, elfcpp::STT_NOTYPE, | |
1058 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, | |
1059 | static_cast<Signed_address>(value) < 0, | |
1060 | false); | |
1061 | // We are creating this symbol late, so need to fix up things | |
1062 | // done early in Layout::finalize. | |
1063 | sym->set_dynsym_index(-1U); | |
1064 | } | |
1065 | ||
9e69ed50 AM |
1066 | bool |
1067 | plt_thread_safe() const | |
1068 | { return this->plt_thread_safe_; } | |
1069 | ||
7ee7ff70 AM |
1070 | bool |
1071 | plt_localentry0() const | |
1072 | { return this->plt_localentry0_; } | |
1073 | ||
1074 | void | |
1075 | set_has_localentry0() | |
1076 | { | |
1077 | this->has_localentry0_ = true; | |
1078 | } | |
1079 | ||
1080 | bool | |
1081 | is_elfv2_localentry0(const Symbol* gsym) const | |
1082 | { | |
1083 | return (size == 64 | |
1084 | && this->abiversion() >= 2 | |
1085 | && this->plt_localentry0() | |
1086 | && gsym->type() == elfcpp::STT_FUNC | |
1087 | && gsym->is_defined() | |
565ed01a AM |
1088 | && gsym->nonvis() >> 3 == 0 |
1089 | && !gsym->non_zero_localentry()); | |
7ee7ff70 AM |
1090 | } |
1091 | ||
1092 | bool | |
1093 | is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object, | |
1094 | unsigned int r_sym) const | |
1095 | { | |
1096 | const Powerpc_relobj<size, big_endian>* ppc_object | |
1097 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
1098 | ||
1099 | if (size == 64 | |
1100 | && this->abiversion() >= 2 | |
1101 | && this->plt_localentry0() | |
1102 | && ppc_object->st_other(r_sym) >> 5 == 0) | |
1103 | { | |
1104 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
1105 | bool is_ordinary; | |
1106 | if (!psymval->is_ifunc_symbol() | |
1107 | && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF | |
1108 | && is_ordinary) | |
1109 | return true; | |
1110 | } | |
1111 | return false; | |
1112 | } | |
1113 | ||
565ed01a AM |
1114 | // Remember any symbols seen with non-zero localentry, even those |
1115 | // not providing a definition | |
1116 | bool | |
1117 | resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*, | |
1118 | const char*) | |
1119 | { | |
1120 | if (size == 64) | |
1121 | { | |
1122 | unsigned char st_other = sym.get_st_other(); | |
1123 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
1124 | to->set_non_zero_localentry(); | |
1125 | } | |
1126 | // We haven't resolved anything, continue normal processing. | |
1127 | return false; | |
1128 | } | |
1129 | ||
b4f7960d | 1130 | int |
aacb3b6d | 1131 | abiversion() const |
b4f7960d AM |
1132 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } |
1133 | ||
1134 | void | |
aacb3b6d | 1135 | set_abiversion(int ver) |
b4f7960d AM |
1136 | { |
1137 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
1138 | flags &= ~elfcpp::EF_PPC64_ABI; | |
1139 | flags |= ver & elfcpp::EF_PPC64_ABI; | |
1140 | this->set_processor_specific_flags(flags); | |
1141 | } | |
1142 | ||
34e0882b AM |
1143 | Symbol* |
1144 | tls_get_addr_opt() const | |
1145 | { return this->tls_get_addr_opt_; } | |
1146 | ||
1147 | Symbol* | |
1148 | tls_get_addr() const | |
1149 | { return this->tls_get_addr_; } | |
1150 | ||
1151 | // If optimizing __tls_get_addr calls, whether this is the | |
1152 | // "__tls_get_addr" symbol. | |
1153 | bool | |
1154 | is_tls_get_addr_opt(const Symbol* gsym) const | |
1155 | { | |
1156 | return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_ | |
1157 | || gsym == this->tls_get_addr_opt_); | |
1158 | } | |
1159 | ||
1160 | bool | |
1161 | replace_tls_get_addr(const Symbol* gsym) const | |
1162 | { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; } | |
1163 | ||
1164 | void | |
1165 | set_has_tls_get_addr_opt() | |
1166 | { this->has_tls_get_addr_opt_ = true; } | |
1167 | ||
aacb3b6d | 1168 | // Offset to toc save stack slot |
b4f7960d | 1169 | int |
aacb3b6d | 1170 | stk_toc() const |
b4f7960d AM |
1171 | { return this->abiversion() < 2 ? 40 : 24; } |
1172 | ||
34e0882b AM |
1173 | // Offset to linker save stack slot. ELFv2 doesn't have a linker word, |
1174 | // so use the CR save slot. Used only by __tls_get_addr call stub, | |
1175 | // relying on __tls_get_addr not saving CR itself. | |
1176 | int | |
1177 | stk_linker() const | |
1178 | { return this->abiversion() < 2 ? 32 : 8; } | |
1179 | ||
724436fc AM |
1180 | // Merge object attributes from input object with those in the output. |
1181 | void | |
1182 | merge_object_attributes(const char*, const Attributes_section_data*); | |
1183 | ||
42cacb20 DE |
1184 | private: |
1185 | ||
e3deeb9c AM |
1186 | class Track_tls |
1187 | { | |
1188 | public: | |
1189 | enum Tls_get_addr | |
1190 | { | |
1191 | NOT_EXPECTED = 0, | |
1192 | EXPECTED = 1, | |
1193 | SKIP = 2, | |
1194 | NORMAL = 3 | |
1195 | }; | |
1196 | ||
1197 | Track_tls() | |
aacb3b6d | 1198 | : tls_get_addr_state_(NOT_EXPECTED), |
e3deeb9c AM |
1199 | relinfo_(NULL), relnum_(0), r_offset_(0) |
1200 | { } | |
1201 | ||
1202 | ~Track_tls() | |
1203 | { | |
aacb3b6d | 1204 | if (this->tls_get_addr_state_ != NOT_EXPECTED) |
e3deeb9c AM |
1205 | this->missing(); |
1206 | } | |
1207 | ||
1208 | void | |
1209 | missing(void) | |
1210 | { | |
1211 | if (this->relinfo_ != NULL) | |
1212 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, | |
1213 | _("missing expected __tls_get_addr call")); | |
1214 | } | |
1215 | ||
1216 | void | |
1217 | expect_tls_get_addr_call( | |
1218 | const Relocate_info<size, big_endian>* relinfo, | |
1219 | size_t relnum, | |
1220 | Address r_offset) | |
1221 | { | |
aacb3b6d | 1222 | this->tls_get_addr_state_ = EXPECTED; |
e3deeb9c AM |
1223 | this->relinfo_ = relinfo; |
1224 | this->relnum_ = relnum; | |
1225 | this->r_offset_ = r_offset; | |
1226 | } | |
1227 | ||
1228 | void | |
1229 | expect_tls_get_addr_call() | |
aacb3b6d | 1230 | { this->tls_get_addr_state_ = EXPECTED; } |
e3deeb9c AM |
1231 | |
1232 | void | |
1233 | skip_next_tls_get_addr_call() | |
aacb3b6d | 1234 | {this->tls_get_addr_state_ = SKIP; } |
e3deeb9c AM |
1235 | |
1236 | Tls_get_addr | |
34e0882b AM |
1237 | maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target, |
1238 | unsigned int r_type, const Symbol* gsym) | |
e3deeb9c AM |
1239 | { |
1240 | bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24 | |
23cedd1d AM |
1241 | || r_type == elfcpp::R_PPC_PLTREL24 |
1242 | || is_plt16_reloc<size>(r_type) | |
1243 | || r_type == elfcpp::R_POWERPC_PLTSEQ | |
1244 | || r_type == elfcpp::R_POWERPC_PLTCALL) | |
e3deeb9c | 1245 | && gsym != NULL |
34e0882b AM |
1246 | && (gsym == target->tls_get_addr() |
1247 | || gsym == target->tls_get_addr_opt())); | |
aacb3b6d AM |
1248 | Tls_get_addr last_tls = this->tls_get_addr_state_; |
1249 | this->tls_get_addr_state_ = NOT_EXPECTED; | |
e3deeb9c AM |
1250 | if (is_tls_call && last_tls != EXPECTED) |
1251 | return last_tls; | |
1252 | else if (!is_tls_call && last_tls != NOT_EXPECTED) | |
1253 | { | |
1254 | this->missing(); | |
1255 | return EXPECTED; | |
1256 | } | |
1257 | return NORMAL; | |
1258 | } | |
1259 | ||
1260 | private: | |
1261 | // What we're up to regarding calls to __tls_get_addr. | |
1262 | // On powerpc, the branch and link insn making a call to | |
1263 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, | |
1264 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the | |
1265 | // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call. | |
1266 | // The marker relocation always comes first, and has the same | |
1267 | // symbol as the reloc on the insn setting up the __tls_get_addr | |
1268 | // argument. This ties the arg setup insn with the call insn, | |
1269 | // allowing ld to safely optimize away the call. We check that | |
1270 | // every call to __tls_get_addr has a marker relocation, and that | |
1271 | // every marker relocation is on a call to __tls_get_addr. | |
aacb3b6d | 1272 | Tls_get_addr tls_get_addr_state_; |
e3deeb9c AM |
1273 | // Info about the last reloc for error message. |
1274 | const Relocate_info<size, big_endian>* relinfo_; | |
1275 | size_t relnum_; | |
1276 | Address r_offset_; | |
1277 | }; | |
1278 | ||
42cacb20 | 1279 | // The class which scans relocations. |
e3deeb9c | 1280 | class Scan : protected Track_tls |
42cacb20 DE |
1281 | { |
1282 | public: | |
bfdfa4cd AM |
1283 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
1284 | ||
42cacb20 | 1285 | Scan() |
e3deeb9c | 1286 | : Track_tls(), issued_non_pic_error_(false) |
42cacb20 DE |
1287 | { } |
1288 | ||
95a2c8d6 | 1289 | static inline int |
88b8e639 | 1290 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
95a2c8d6 | 1291 | |
42cacb20 | 1292 | inline void |
ad0f2072 | 1293 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1294 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1295 | unsigned int data_shndx, |
1296 | Output_section* output_section, | |
1297 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
bfdfa4cd AM |
1298 | const elfcpp::Sym<size, big_endian>& lsym, |
1299 | bool is_discarded); | |
42cacb20 DE |
1300 | |
1301 | inline void | |
ad0f2072 | 1302 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
6fa2a40b | 1303 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1304 | unsigned int data_shndx, |
1305 | Output_section* output_section, | |
1306 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
1307 | Symbol* gsym); | |
1308 | ||
21bb3914 ST |
1309 | inline bool |
1310 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1311 | Target_powerpc* , | |
f6971787 | 1312 | Sized_relobj_file<size, big_endian>* relobj, |
21bb3914 | 1313 | unsigned int , |
2e702c99 RM |
1314 | Output_section* , |
1315 | const elfcpp::Rela<size, big_endian>& , | |
4d9aa155 | 1316 | unsigned int r_type, |
2e702c99 | 1317 | const elfcpp::Sym<size, big_endian>&) |
4d9aa155 AM |
1318 | { |
1319 | // PowerPC64 .opd is not folded, so any identical function text | |
1320 | // may be folded and we'll still keep function addresses distinct. | |
1321 | // That means no reloc is of concern here. | |
1322 | if (size == 64) | |
f6971787 AM |
1323 | { |
1324 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1325 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1326 | if (ppcobj->abiversion() == 1) | |
1327 | return false; | |
1328 | } | |
1329 | // For 32-bit and ELFv2, conservatively assume anything but calls to | |
4d9aa155 AM |
1330 | // function code might be taking the address of the function. |
1331 | return !is_branch_reloc(r_type); | |
1332 | } | |
21bb3914 ST |
1333 | |
1334 | inline bool | |
1335 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
1336 | Target_powerpc* , | |
f6971787 | 1337 | Sized_relobj_file<size, big_endian>* relobj, |
2e702c99 RM |
1338 | unsigned int , |
1339 | Output_section* , | |
4d9aa155 AM |
1340 | const elfcpp::Rela<size, big_endian>& , |
1341 | unsigned int r_type, | |
1342 | Symbol*) | |
1343 | { | |
1344 | // As above. | |
1345 | if (size == 64) | |
f6971787 AM |
1346 | { |
1347 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
1348 | <Powerpc_relobj<size, big_endian>*>(relobj); | |
1349 | if (ppcobj->abiversion() == 1) | |
1350 | return false; | |
1351 | } | |
4d9aa155 AM |
1352 | return !is_branch_reloc(r_type); |
1353 | } | |
21bb3914 | 1354 | |
b3ccdeb5 | 1355 | static bool |
9055360d AM |
1356 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
1357 | Sized_relobj_file<size, big_endian>* object, | |
b3ccdeb5 AM |
1358 | unsigned int r_type, bool report_err); |
1359 | ||
42cacb20 DE |
1360 | private: |
1361 | static void | |
6fa2a40b | 1362 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1363 | unsigned int r_type); |
1364 | ||
1365 | static void | |
6fa2a40b | 1366 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
42cacb20 DE |
1367 | unsigned int r_type, Symbol*); |
1368 | ||
1369 | static void | |
1370 | generate_tls_call(Symbol_table* symtab, Layout* layout, | |
1371 | Target_powerpc* target); | |
1372 | ||
1373 | void | |
1374 | check_non_pic(Relobj*, unsigned int r_type); | |
1375 | ||
1376 | // Whether we have issued an error about a non-PIC compilation. | |
1377 | bool issued_non_pic_error_; | |
1378 | }; | |
1379 | ||
1611bc4a AM |
1380 | bool |
1381 | symval_for_branch(const Symbol_table* symtab, | |
6c77229c | 1382 | const Sized_symbol<size>* gsym, |
3ea0a085 | 1383 | Powerpc_relobj<size, big_endian>* object, |
1611bc4a | 1384 | Address *value, unsigned int *dest_shndx); |
3ea0a085 | 1385 | |
42cacb20 | 1386 | // The class which implements relocation. |
e3deeb9c | 1387 | class Relocate : protected Track_tls |
42cacb20 DE |
1388 | { |
1389 | public: | |
dd93cd0a AM |
1390 | // Use 'at' branch hints when true, 'y' when false. |
1391 | // FIXME maybe: set this with an option. | |
1392 | static const bool is_isa_v2 = true; | |
1393 | ||
dd93cd0a | 1394 | Relocate() |
e3deeb9c | 1395 | : Track_tls() |
dd93cd0a AM |
1396 | { } |
1397 | ||
42cacb20 DE |
1398 | // Do a relocation. Return false if the caller should not issue |
1399 | // any warnings about this relocation. | |
1400 | inline bool | |
91a65d2f AM |
1401 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
1402 | Target_powerpc*, Output_section*, size_t, const unsigned char*, | |
1403 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
1404 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, | |
42cacb20 | 1405 | section_size_type); |
42cacb20 DE |
1406 | }; |
1407 | ||
168a4726 AM |
1408 | class Relocate_comdat_behavior |
1409 | { | |
1410 | public: | |
1411 | // Decide what the linker should do for relocations that refer to | |
1412 | // discarded comdat sections. | |
1413 | inline Comdat_behavior | |
1414 | get(const char* name) | |
1415 | { | |
1416 | gold::Default_comdat_behavior default_behavior; | |
1417 | Comdat_behavior ret = default_behavior.get(name); | |
43193fe9 | 1418 | if (ret == CB_ERROR) |
168a4726 AM |
1419 | { |
1420 | if (size == 32 | |
1421 | && (strcmp(name, ".fixup") == 0 | |
1422 | || strcmp(name, ".got2") == 0)) | |
1423 | ret = CB_IGNORE; | |
1424 | if (size == 64 | |
1425 | && (strcmp(name, ".opd") == 0 | |
1426 | || strcmp(name, ".toc") == 0 | |
1427 | || strcmp(name, ".toc1") == 0)) | |
1428 | ret = CB_IGNORE; | |
1429 | } | |
1430 | return ret; | |
1431 | } | |
1432 | }; | |
1433 | ||
dd93cd0a AM |
1434 | // Optimize the TLS relocation type based on what we know about the |
1435 | // symbol. IS_FINAL is true if the final address of this symbol is | |
1436 | // known at link time. | |
1437 | ||
1438 | tls::Tls_optimization | |
1439 | optimize_tls_gd(bool is_final) | |
1440 | { | |
1441 | // If we are generating a shared library, then we can't do anything | |
1442 | // in the linker. | |
aacb3b6d AM |
1443 | if (parameters->options().shared() |
1444 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1445 | return tls::TLSOPT_NONE; |
1446 | ||
1447 | if (!is_final) | |
1448 | return tls::TLSOPT_TO_IE; | |
1449 | return tls::TLSOPT_TO_LE; | |
1450 | } | |
1451 | ||
1452 | tls::Tls_optimization | |
1453 | optimize_tls_ld() | |
1454 | { | |
aacb3b6d AM |
1455 | if (parameters->options().shared() |
1456 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1457 | return tls::TLSOPT_NONE; |
1458 | ||
1459 | return tls::TLSOPT_TO_LE; | |
1460 | } | |
1461 | ||
1462 | tls::Tls_optimization | |
1463 | optimize_tls_ie(bool is_final) | |
1464 | { | |
aacb3b6d AM |
1465 | if (!is_final |
1466 | || parameters->options().shared() | |
1467 | || !parameters->options().tls_optimize()) | |
dd93cd0a AM |
1468 | return tls::TLSOPT_NONE; |
1469 | ||
1470 | return tls::TLSOPT_TO_LE; | |
1471 | } | |
cf43a2fe | 1472 | |
cf43a2fe AM |
1473 | // Create glink. |
1474 | void | |
1475 | make_glink_section(Layout*); | |
42cacb20 | 1476 | |
cf43a2fe AM |
1477 | // Create the PLT section. |
1478 | void | |
40b469d7 | 1479 | make_plt_section(Symbol_table*, Layout*); |
42cacb20 | 1480 | |
e5d5f5ed | 1481 | void |
40b469d7 | 1482 | make_iplt_section(Symbol_table*, Layout*); |
e5d5f5ed | 1483 | |
2d7ad24e AM |
1484 | void |
1485 | make_lplt_section(Layout*); | |
1486 | ||
ec661b9d AM |
1487 | void |
1488 | make_brlt_section(Layout*); | |
1489 | ||
42cacb20 DE |
1490 | // Create a PLT entry for a global symbol. |
1491 | void | |
ec661b9d | 1492 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
e5d5f5ed AM |
1493 | |
1494 | // Create a PLT entry for a local IFUNC symbol. | |
1495 | void | |
40b469d7 | 1496 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
ec661b9d AM |
1497 | Sized_relobj_file<size, big_endian>*, |
1498 | unsigned int); | |
1499 | ||
2d7ad24e AM |
1500 | // Create a PLT entry for a local non-IFUNC symbol. |
1501 | void | |
1502 | make_local_plt_entry(Layout*, | |
1503 | Sized_relobj_file<size, big_endian>*, | |
1504 | unsigned int); | |
1505 | ||
42cacb20 | 1506 | |
dd93cd0a AM |
1507 | // Create a GOT entry for local dynamic __tls_get_addr. |
1508 | unsigned int | |
1509 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, | |
1510 | Sized_relobj_file<size, big_endian>* object); | |
1511 | ||
42cacb20 | 1512 | unsigned int |
dd93cd0a AM |
1513 | tlsld_got_offset() const |
1514 | { | |
1515 | return this->tlsld_got_offset_; | |
1516 | } | |
42cacb20 | 1517 | |
42cacb20 DE |
1518 | // Get the dynamic reloc section, creating it if necessary. |
1519 | Reloc_section* | |
1520 | rela_dyn_section(Layout*); | |
1521 | ||
b3ccdeb5 AM |
1522 | // Similarly, but for ifunc symbols get the one for ifunc. |
1523 | Reloc_section* | |
1524 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); | |
1525 | ||
42cacb20 DE |
1526 | // Copy a relocation against a global symbol. |
1527 | void | |
ef9beddf | 1528 | copy_reloc(Symbol_table* symtab, Layout* layout, |
2e702c99 | 1529 | Sized_relobj_file<size, big_endian>* object, |
42cacb20 DE |
1530 | unsigned int shndx, Output_section* output_section, |
1531 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
1532 | { | |
859d7987 | 1533 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
42cacb20 DE |
1534 | this->copy_relocs_.copy_reloc(symtab, layout, |
1535 | symtab->get_sized_symbol<size>(sym), | |
1536 | object, shndx, output_section, | |
859d7987 CC |
1537 | r_type, reloc.get_r_offset(), |
1538 | reloc.get_r_addend(), | |
1539 | this->rela_dyn_section(layout)); | |
42cacb20 DE |
1540 | } |
1541 | ||
0cfdc767 | 1542 | // Look over all the input sections, deciding where to place stubs. |
ec661b9d | 1543 | void |
a3e60ddb | 1544 | group_sections(Layout*, const Task*, bool); |
ec661b9d AM |
1545 | |
1546 | // Sort output sections by address. | |
1547 | struct Sort_sections | |
1548 | { | |
1549 | bool | |
1550 | operator()(const Output_section* sec1, const Output_section* sec2) | |
1551 | { return sec1->address() < sec2->address(); } | |
1552 | }; | |
1553 | ||
1554 | class Branch_info | |
1555 | { | |
1556 | public: | |
1557 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, | |
1558 | unsigned int data_shndx, | |
1559 | Address r_offset, | |
1560 | unsigned int r_type, | |
1561 | unsigned int r_sym, | |
1562 | Address addend) | |
1563 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), | |
7e57d19e | 1564 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
ec661b9d AM |
1565 | { } |
1566 | ||
1567 | ~Branch_info() | |
1568 | { } | |
1569 | ||
7e57d19e AM |
1570 | // Return whether this branch is going via a plt call stub, and if |
1571 | // so, mark it as having an R_PPC64_TOCSAVE. | |
1572 | bool | |
1573 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, | |
1574 | unsigned int shndx, Address offset, | |
1575 | Target_powerpc* target, Symbol_table* symtab); | |
1576 | ||
ec661b9d | 1577 | // If this branch needs a plt call stub, or a long branch stub, make one. |
a3e60ddb | 1578 | bool |
ec661b9d AM |
1579 | make_stub(Stub_table<size, big_endian>*, |
1580 | Stub_table<size, big_endian>*, | |
1581 | Symbol_table*) const; | |
1582 | ||
1583 | private: | |
1584 | // The branch location.. | |
1585 | Powerpc_relobj<size, big_endian>* object_; | |
1586 | unsigned int shndx_; | |
1587 | Address offset_; | |
1588 | // ..and the branch type and destination. | |
7e57d19e AM |
1589 | unsigned int r_type_ : 31; |
1590 | unsigned int tocsave_ : 1; | |
ec661b9d AM |
1591 | unsigned int r_sym_; |
1592 | Address addend_; | |
1593 | }; | |
1594 | ||
42cacb20 DE |
1595 | // Information about this specific target which we pass to the |
1596 | // general Target structure. | |
1597 | static Target::Target_info powerpc_info; | |
1598 | ||
1599 | // The types of GOT entries needed for this platform. | |
0e70b911 CC |
1600 | // These values are exposed to the ABI in an incremental link. |
1601 | // Do not renumber existing values without changing the version | |
1602 | // number of the .gnu_incremental_inputs section. | |
42cacb20 DE |
1603 | enum Got_type |
1604 | { | |
dd93cd0a AM |
1605 | GOT_TYPE_STANDARD, |
1606 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd | |
1607 | GOT_TYPE_DTPREL, // entry for @got@dtprel | |
1608 | GOT_TYPE_TPREL // entry for @got@tprel | |
42cacb20 DE |
1609 | }; |
1610 | ||
ec661b9d | 1611 | // The GOT section. |
cf43a2fe | 1612 | Output_data_got_powerpc<size, big_endian>* got_; |
b3ccdeb5 AM |
1613 | // The PLT section. This is a container for a table of addresses, |
1614 | // and their relocations. Each address in the PLT has a dynamic | |
1615 | // relocation (R_*_JMP_SLOT) and each address will have a | |
1616 | // corresponding entry in .glink for lazy resolution of the PLT. | |
1617 | // ppc32 initialises the PLT to point at the .glink entry, while | |
1618 | // ppc64 leaves this to ld.so. To make a call via the PLT, the | |
1619 | // linker adds a stub that loads the PLT entry into ctr then | |
1620 | // branches to ctr. There may be more than one stub for each PLT | |
1621 | // entry. DT_JMPREL points at the first PLT dynamic relocation and | |
1622 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. | |
42cacb20 | 1623 | Output_data_plt_powerpc<size, big_endian>* plt_; |
b3ccdeb5 AM |
1624 | // The IPLT section. Like plt_, this is a container for a table of |
1625 | // addresses and their relocations, specifically for STT_GNU_IFUNC | |
1626 | // functions that resolve locally (STT_GNU_IFUNC functions that | |
1627 | // don't resolve locally go in PLT). Unlike plt_, these have no | |
1628 | // entry in .glink for lazy resolution, and the relocation section | |
1629 | // does not have a 1-1 correspondence with IPLT addresses. In fact, | |
1630 | // the relocation section may contain relocations against | |
1631 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The | |
1632 | // relocation section will appear at the end of other dynamic | |
1633 | // relocations, so that ld.so applies these relocations after other | |
1634 | // dynamic relocations. In a static executable, the relocation | |
1635 | // section is emitted and marked with __rela_iplt_start and | |
1636 | // __rela_iplt_end symbols. | |
e5d5f5ed | 1637 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
2d7ad24e AM |
1638 | // A PLT style section for local, non-ifunc symbols |
1639 | Output_data_plt_powerpc<size, big_endian>* lplt_; | |
ec661b9d AM |
1640 | // Section holding long branch destinations. |
1641 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; | |
1642 | // The .glink section. | |
cf43a2fe | 1643 | Output_data_glink<size, big_endian>* glink_; |
ec661b9d | 1644 | // The dynamic reloc section. |
42cacb20 DE |
1645 | Reloc_section* rela_dyn_; |
1646 | // Relocs saved to avoid a COPY reloc. | |
5edad15d | 1647 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
dd93cd0a AM |
1648 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
1649 | unsigned int tlsld_got_offset_; | |
ec661b9d AM |
1650 | |
1651 | Stub_tables stub_tables_; | |
1652 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; | |
1653 | Branch_lookup_table branch_lookup_table_; | |
1654 | ||
1655 | typedef std::vector<Branch_info> Branches; | |
1656 | Branches branch_info_; | |
7e57d19e | 1657 | Tocsave_loc tocsave_loc_; |
9e69ed50 AM |
1658 | |
1659 | bool plt_thread_safe_; | |
7ee7ff70 AM |
1660 | bool plt_localentry0_; |
1661 | bool plt_localentry0_init_; | |
1662 | bool has_localentry0_; | |
34e0882b | 1663 | bool has_tls_get_addr_opt_; |
a3e60ddb AM |
1664 | |
1665 | bool relax_failed_; | |
1666 | int relax_fail_count_; | |
1667 | int32_t stub_group_size_; | |
d49044c7 AM |
1668 | |
1669 | Output_data_save_res<size, big_endian> *savres_section_; | |
34e0882b AM |
1670 | |
1671 | // The "__tls_get_addr" symbol, if present | |
1672 | Symbol* tls_get_addr_; | |
1673 | // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol. | |
1674 | Symbol* tls_get_addr_opt_; | |
724436fc AM |
1675 | |
1676 | // Attributes in output. | |
1677 | Attributes_section_data* attributes_section_data_; | |
1678 | ||
1679 | // Last input file to change various attribute tags | |
1680 | const char* last_fp_; | |
1681 | const char* last_ld_; | |
1682 | const char* last_vec_; | |
1683 | const char* last_struct_; | |
42cacb20 DE |
1684 | }; |
1685 | ||
1686 | template<> | |
1687 | Target::Target_info Target_powerpc<32, true>::powerpc_info = | |
1688 | { | |
1689 | 32, // size | |
1690 | true, // is_big_endian | |
1691 | elfcpp::EM_PPC, // machine_code | |
1692 | false, // has_make_symbol | |
1693 | false, // has_resolve | |
1694 | false, // has_code_fill | |
1695 | true, // is_default_stack_executable | |
b3ce541e | 1696 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1697 | '\0', // wrap_char |
1698 | "/usr/lib/ld.so.1", // dynamic_linker | |
1699 | 0x10000000, // default_text_segment_address | |
1700 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1701 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1702 | false, // isolate_execinstr |
1703 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1704 | elfcpp::SHN_UNDEF, // small_common_shndx |
1705 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1706 | 0, // small_common_section_flags | |
05a352e6 DK |
1707 | 0, // large_common_section_flags |
1708 | NULL, // attributes_section | |
a67858e0 | 1709 | NULL, // attributes_vendor |
8d9743bd MK |
1710 | "_start", // entry_symbol_name |
1711 | 32, // hash_entry_size | |
bce5a025 | 1712 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1713 | }; |
1714 | ||
1715 | template<> | |
1716 | Target::Target_info Target_powerpc<32, false>::powerpc_info = | |
1717 | { | |
1718 | 32, // size | |
1719 | false, // is_big_endian | |
1720 | elfcpp::EM_PPC, // machine_code | |
1721 | false, // has_make_symbol | |
1722 | false, // has_resolve | |
1723 | false, // has_code_fill | |
1724 | true, // is_default_stack_executable | |
b3ce541e | 1725 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1726 | '\0', // wrap_char |
1727 | "/usr/lib/ld.so.1", // dynamic_linker | |
1728 | 0x10000000, // default_text_segment_address | |
1729 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
8a5e3e08 | 1730 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1731 | false, // isolate_execinstr |
1732 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1733 | elfcpp::SHN_UNDEF, // small_common_shndx |
1734 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1735 | 0, // small_common_section_flags | |
05a352e6 DK |
1736 | 0, // large_common_section_flags |
1737 | NULL, // attributes_section | |
a67858e0 | 1738 | NULL, // attributes_vendor |
8d9743bd MK |
1739 | "_start", // entry_symbol_name |
1740 | 32, // hash_entry_size | |
bce5a025 | 1741 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1742 | }; |
1743 | ||
1744 | template<> | |
1745 | Target::Target_info Target_powerpc<64, true>::powerpc_info = | |
1746 | { | |
1747 | 64, // size | |
1748 | true, // is_big_endian | |
1749 | elfcpp::EM_PPC64, // machine_code | |
1750 | false, // has_make_symbol | |
565ed01a | 1751 | true, // has_resolve |
42cacb20 | 1752 | false, // has_code_fill |
ec769010 | 1753 | false, // is_default_stack_executable |
b3ce541e | 1754 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1755 | '\0', // wrap_char |
1756 | "/usr/lib/ld.so.1", // dynamic_linker | |
1757 | 0x10000000, // default_text_segment_address | |
1758 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1759 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1760 | false, // isolate_execinstr |
1761 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1762 | elfcpp::SHN_UNDEF, // small_common_shndx |
1763 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1764 | 0, // small_common_section_flags | |
05a352e6 DK |
1765 | 0, // large_common_section_flags |
1766 | NULL, // attributes_section | |
a67858e0 | 1767 | NULL, // attributes_vendor |
8d9743bd MK |
1768 | "_start", // entry_symbol_name |
1769 | 32, // hash_entry_size | |
bce5a025 | 1770 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1771 | }; |
1772 | ||
1773 | template<> | |
1774 | Target::Target_info Target_powerpc<64, false>::powerpc_info = | |
1775 | { | |
1776 | 64, // size | |
1777 | false, // is_big_endian | |
1778 | elfcpp::EM_PPC64, // machine_code | |
1779 | false, // has_make_symbol | |
565ed01a | 1780 | true, // has_resolve |
42cacb20 | 1781 | false, // has_code_fill |
ec769010 | 1782 | false, // is_default_stack_executable |
b3ce541e | 1783 | false, // can_icf_inline_merge_sections |
42cacb20 DE |
1784 | '\0', // wrap_char |
1785 | "/usr/lib/ld.so.1", // dynamic_linker | |
1786 | 0x10000000, // default_text_segment_address | |
1787 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
dd93cd0a | 1788 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
c9269dff AM |
1789 | false, // isolate_execinstr |
1790 | 0, // rosegment_gap | |
8a5e3e08 ILT |
1791 | elfcpp::SHN_UNDEF, // small_common_shndx |
1792 | elfcpp::SHN_UNDEF, // large_common_shndx | |
1793 | 0, // small_common_section_flags | |
05a352e6 DK |
1794 | 0, // large_common_section_flags |
1795 | NULL, // attributes_section | |
a67858e0 | 1796 | NULL, // attributes_vendor |
8d9743bd MK |
1797 | "_start", // entry_symbol_name |
1798 | 32, // hash_entry_size | |
bce5a025 | 1799 | elfcpp::SHT_PROGBITS, // unwind_section_type |
42cacb20 DE |
1800 | }; |
1801 | ||
dd93cd0a AM |
1802 | inline bool |
1803 | is_branch_reloc(unsigned int r_type) | |
1804 | { | |
1805 | return (r_type == elfcpp::R_POWERPC_REL24 | |
1806 | || r_type == elfcpp::R_PPC_PLTREL24 | |
1807 | || r_type == elfcpp::R_PPC_LOCAL24PC | |
1808 | || r_type == elfcpp::R_POWERPC_REL14 | |
1809 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
1810 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN | |
1811 | || r_type == elfcpp::R_POWERPC_ADDR24 | |
1812 | || r_type == elfcpp::R_POWERPC_ADDR14 | |
1813 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN | |
1814 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); | |
1815 | } | |
1816 | ||
08be3224 AM |
1817 | // Reloc resolves to plt entry. |
1818 | template<int size> | |
1819 | inline bool | |
1820 | is_plt16_reloc(unsigned int r_type) | |
1821 | { | |
1822 | return (r_type == elfcpp::R_POWERPC_PLT16_LO | |
1823 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
1824 | || r_type == elfcpp::R_POWERPC_PLT16_HA | |
1825 | || (size == 64 && r_type == elfcpp::R_PPC64_PLT16_LO_DS)); | |
1826 | } | |
1827 | ||
dd93cd0a AM |
1828 | // If INSN is an opcode that may be used with an @tls operand, return |
1829 | // the transformed insn for TLS optimisation, otherwise return 0. If | |
1830 | // REG is non-zero only match an insn with RB or RA equal to REG. | |
1831 | uint32_t | |
1832 | at_tls_transform(uint32_t insn, unsigned int reg) | |
1833 | { | |
1834 | if ((insn & (0x3f << 26)) != 31 << 26) | |
1835 | return 0; | |
1836 | ||
1837 | unsigned int rtra; | |
1838 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
1839 | rtra = insn & ((1 << 26) - (1 << 16)); | |
1840 | else if (((insn >> 16) & 0x1f) == reg) | |
1841 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
1842 | else | |
1843 | return 0; | |
1844 | ||
1845 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
1846 | // add -> addi | |
1847 | insn = 14 << 26; | |
1848 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
1849 | && ((insn & (0x1f << 6)) < 14 << 6 | |
1850 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
1851 | && (insn & (0x1f << 6)) < 24 << 6))) | |
1852 | // load and store indexed -> dform | |
1853 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; | |
1854 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) | |
1855 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu | |
1856 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); | |
1857 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) | |
1858 | // lwax -> lwa | |
1859 | insn = (58 << 26) | 2; | |
1860 | else | |
1861 | return 0; | |
1862 | insn |= rtra; | |
1863 | return insn; | |
1864 | } | |
1865 | ||
dd93cd0a | 1866 | |
42cacb20 DE |
1867 | template<int size, bool big_endian> |
1868 | class Powerpc_relocate_functions | |
1869 | { | |
dd93cd0a | 1870 | public: |
f4baf0d4 | 1871 | enum Overflow_check |
dd93cd0a | 1872 | { |
f4baf0d4 AM |
1873 | CHECK_NONE, |
1874 | CHECK_SIGNED, | |
b80eed39 AM |
1875 | CHECK_UNSIGNED, |
1876 | CHECK_BITFIELD, | |
1877 | CHECK_LOW_INSN, | |
1878 | CHECK_HIGH_INSN | |
dd93cd0a AM |
1879 | }; |
1880 | ||
f4baf0d4 | 1881 | enum Status |
dd93cd0a | 1882 | { |
f4baf0d4 AM |
1883 | STATUS_OK, |
1884 | STATUS_OVERFLOW | |
1885 | }; | |
dd93cd0a | 1886 | |
42cacb20 | 1887 | private: |
c9269dff | 1888 | typedef Powerpc_relocate_functions<size, big_endian> This; |
c9269dff | 1889 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
a680de9a | 1890 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
c9269dff | 1891 | |
dd93cd0a AM |
1892 | template<int valsize> |
1893 | static inline bool | |
1894 | has_overflow_signed(Address value) | |
1895 | { | |
1896 | // limit = 1 << (valsize - 1) without shift count exceeding size of type | |
1897 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1898 | limit <<= ((valsize - 1) >> 1); | |
1899 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
1900 | return value + limit > (limit << 1) - 1; | |
1901 | } | |
1902 | ||
1903 | template<int valsize> | |
1904 | static inline bool | |
b80eed39 | 1905 | has_overflow_unsigned(Address value) |
dd93cd0a AM |
1906 | { |
1907 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); | |
1908 | limit <<= ((valsize - 1) >> 1); | |
1909 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); | |
b80eed39 AM |
1910 | return value > (limit << 1) - 1; |
1911 | } | |
1912 | ||
1913 | template<int valsize> | |
1914 | static inline bool | |
1915 | has_overflow_bitfield(Address value) | |
1916 | { | |
1917 | return (has_overflow_unsigned<valsize>(value) | |
1918 | && has_overflow_signed<valsize>(value)); | |
dd93cd0a AM |
1919 | } |
1920 | ||
1921 | template<int valsize> | |
f4baf0d4 AM |
1922 | static inline Status |
1923 | overflowed(Address value, Overflow_check overflow) | |
dd93cd0a | 1924 | { |
f4baf0d4 | 1925 | if (overflow == CHECK_SIGNED) |
dd93cd0a AM |
1926 | { |
1927 | if (has_overflow_signed<valsize>(value)) | |
f4baf0d4 | 1928 | return STATUS_OVERFLOW; |
dd93cd0a | 1929 | } |
b80eed39 AM |
1930 | else if (overflow == CHECK_UNSIGNED) |
1931 | { | |
1932 | if (has_overflow_unsigned<valsize>(value)) | |
1933 | return STATUS_OVERFLOW; | |
1934 | } | |
f4baf0d4 | 1935 | else if (overflow == CHECK_BITFIELD) |
dd93cd0a AM |
1936 | { |
1937 | if (has_overflow_bitfield<valsize>(value)) | |
f4baf0d4 | 1938 | return STATUS_OVERFLOW; |
dd93cd0a | 1939 | } |
f4baf0d4 | 1940 | return STATUS_OK; |
dd93cd0a AM |
1941 | } |
1942 | ||
cf43a2fe | 1943 | // Do a simple RELA relocation |
0cfb0717 | 1944 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1945 | static inline Status |
1946 | rela(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1947 | { |
0cfb0717 | 1948 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
dd93cd0a | 1949 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1950 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
dd93cd0a AM |
1951 | return overflowed<valsize>(value, overflow); |
1952 | } | |
1953 | ||
0cfb0717 | 1954 | template<int fieldsize, int valsize> |
f4baf0d4 | 1955 | static inline Status |
42cacb20 DE |
1956 | rela(unsigned char* view, |
1957 | unsigned int right_shift, | |
0cfb0717 | 1958 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1959 | Address value, |
f4baf0d4 | 1960 | Overflow_check overflow) |
42cacb20 | 1961 | { |
0cfb0717 | 1962 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
42cacb20 | 1963 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
0cfb0717 | 1964 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
dd93cd0a | 1965 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1966 | val &= ~dst_mask; |
1967 | reloc &= dst_mask; | |
0cfb0717 | 1968 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
dd93cd0a | 1969 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1970 | } |
1971 | ||
cf43a2fe | 1972 | // Do a simple RELA relocation, unaligned. |
0cfb0717 | 1973 | template<int fieldsize, int valsize> |
f4baf0d4 AM |
1974 | static inline Status |
1975 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 1976 | { |
0cfb0717 | 1977 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
dd93cd0a AM |
1978 | return overflowed<valsize>(value, overflow); |
1979 | } | |
1980 | ||
0cfb0717 | 1981 | template<int fieldsize, int valsize> |
f4baf0d4 | 1982 | static inline Status |
cf43a2fe AM |
1983 | rela_ua(unsigned char* view, |
1984 | unsigned int right_shift, | |
0cfb0717 | 1985 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
c9269dff | 1986 | Address value, |
f4baf0d4 | 1987 | Overflow_check overflow) |
42cacb20 | 1988 | { |
0cfb0717 | 1989 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
c9269dff | 1990 | Valtype; |
0cfb0717 | 1991 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
dd93cd0a | 1992 | Valtype reloc = value >> right_shift; |
42cacb20 DE |
1993 | val &= ~dst_mask; |
1994 | reloc &= dst_mask; | |
0cfb0717 | 1995 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
dd93cd0a | 1996 | return overflowed<valsize>(value >> right_shift, overflow); |
42cacb20 DE |
1997 | } |
1998 | ||
42cacb20 | 1999 | public: |
dd93cd0a | 2000 | // R_PPC64_ADDR64: (Symbol + Addend) |
42cacb20 | 2001 | static inline void |
dd93cd0a | 2002 | addr64(unsigned char* view, Address value) |
0cfb0717 | 2003 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
42cacb20 | 2004 | |
dd93cd0a | 2005 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
42cacb20 | 2006 | static inline void |
dd93cd0a | 2007 | addr64_u(unsigned char* view, Address value) |
0cfb0717 | 2008 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
dd93cd0a AM |
2009 | |
2010 | // R_POWERPC_ADDR32: (Symbol + Addend) | |
f4baf0d4 AM |
2011 | static inline Status |
2012 | addr32(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 2013 | { return This::template rela<32,32>(view, value, overflow); } |
dd93cd0a AM |
2014 | |
2015 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned | |
f4baf0d4 AM |
2016 | static inline Status |
2017 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 2018 | { return This::template rela_ua<32,32>(view, value, overflow); } |
dd93cd0a AM |
2019 | |
2020 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc | |
f4baf0d4 AM |
2021 | static inline Status |
2022 | addr24(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 2023 | { |
0cfb0717 AM |
2024 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
2025 | value, overflow); | |
f4baf0d4 AM |
2026 | if (overflow != CHECK_NONE && (value & 3) != 0) |
2027 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
2028 | return stat; |
2029 | } | |
42cacb20 DE |
2030 | |
2031 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff | |
f4baf0d4 AM |
2032 | static inline Status |
2033 | addr16(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 2034 | { return This::template rela<16,16>(view, value, overflow); } |
42cacb20 | 2035 | |
dd93cd0a | 2036 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
f4baf0d4 AM |
2037 | static inline Status |
2038 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) | |
0cfb0717 | 2039 | { return This::template rela_ua<16,16>(view, value, overflow); } |
42cacb20 | 2040 | |
dd93cd0a | 2041 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
f4baf0d4 AM |
2042 | static inline Status |
2043 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 2044 | { |
0cfb0717 | 2045 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
ec86f434 | 2046 | if ((value & 3) != 0) |
f4baf0d4 | 2047 | stat = STATUS_OVERFLOW; |
dd93cd0a AM |
2048 | return stat; |
2049 | } | |
42cacb20 | 2050 | |
a680de9a PB |
2051 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
2052 | static inline Status | |
2053 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) | |
2054 | { | |
2055 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); | |
2056 | if ((value & 15) != 0) | |
2057 | stat = STATUS_OVERFLOW; | |
2058 | return stat; | |
2059 | } | |
2060 | ||
42cacb20 DE |
2061 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
2062 | static inline void | |
dd93cd0a | 2063 | addr16_hi(unsigned char* view, Address value) |
0cfb0717 | 2064 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2065 | |
c9269dff | 2066 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
42cacb20 | 2067 | static inline void |
dd93cd0a AM |
2068 | addr16_ha(unsigned char* view, Address value) |
2069 | { This::addr16_hi(view, value + 0x8000); } | |
42cacb20 | 2070 | |
dd93cd0a | 2071 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
42cacb20 | 2072 | static inline void |
dd93cd0a | 2073 | addr16_hi2(unsigned char* view, Address value) |
0cfb0717 | 2074 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2075 | |
dd93cd0a | 2076 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
42cacb20 | 2077 | static inline void |
dd93cd0a AM |
2078 | addr16_ha2(unsigned char* view, Address value) |
2079 | { This::addr16_hi2(view, value + 0x8000); } | |
42cacb20 | 2080 | |
dd93cd0a | 2081 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
42cacb20 | 2082 | static inline void |
dd93cd0a | 2083 | addr16_hi3(unsigned char* view, Address value) |
0cfb0717 | 2084 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
42cacb20 | 2085 | |
dd93cd0a | 2086 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
42cacb20 | 2087 | static inline void |
dd93cd0a AM |
2088 | addr16_ha3(unsigned char* view, Address value) |
2089 | { This::addr16_hi3(view, value + 0x8000); } | |
2090 | ||
2091 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc | |
f4baf0d4 AM |
2092 | static inline Status |
2093 | addr14(unsigned char* view, Address value, Overflow_check overflow) | |
dd93cd0a | 2094 | { |
0cfb0717 | 2095 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
f4baf0d4 AM |
2096 | if (overflow != CHECK_NONE && (value & 3) != 0) |
2097 | stat = STATUS_OVERFLOW; | |
dd93cd0a AM |
2098 | return stat; |
2099 | } | |
a680de9a PB |
2100 | |
2101 | // R_POWERPC_REL16DX_HA | |
2102 | static inline Status | |
2103 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) | |
2104 | { | |
2105 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
2106 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
2107 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
2108 | value += 0x8000; | |
2109 | value = static_cast<SignedAddress>(value) >> 16; | |
2110 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
2111 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
2112 | return overflowed<16>(value, overflow); | |
2113 | } | |
cf43a2fe AM |
2114 | }; |
2115 | ||
b4f7960d AM |
2116 | // Set ABI version for input and output. |
2117 | ||
2118 | template<int size, bool big_endian> | |
2119 | void | |
2120 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) | |
2121 | { | |
2122 | this->e_flags_ |= ver; | |
2123 | if (this->abiversion() != 0) | |
2124 | { | |
2125 | Target_powerpc<size, big_endian>* target = | |
2126 | static_cast<Target_powerpc<size, big_endian>*>( | |
2127 | parameters->sized_target<size, big_endian>()); | |
2128 | if (target->abiversion() == 0) | |
2129 | target->set_abiversion(this->abiversion()); | |
2130 | else if (target->abiversion() != this->abiversion()) | |
2131 | gold_error(_("%s: ABI version %d is not compatible " | |
2132 | "with ABI version %d output"), | |
2133 | this->name().c_str(), | |
2134 | this->abiversion(), target->abiversion()); | |
2135 | ||
2136 | } | |
2137 | } | |
2138 | ||
5edad15d AM |
2139 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
2140 | // relocatable object, if such sections exists. | |
cf43a2fe AM |
2141 | |
2142 | template<int size, bool big_endian> | |
2143 | bool | |
2144 | Powerpc_relobj<size, big_endian>::do_find_special_sections( | |
2145 | Read_symbols_data* sd) | |
2146 | { | |
c9269dff AM |
2147 | const unsigned char* const pshdrs = sd->section_headers->data(); |
2148 | const unsigned char* namesu = sd->section_names->data(); | |
2149 | const char* names = reinterpret_cast<const char*>(namesu); | |
2150 | section_size_type names_size = sd->section_names_size; | |
2151 | const unsigned char* s; | |
2152 | ||
dc3714f3 AM |
2153 | s = this->template find_shdr<size, big_endian>(pshdrs, |
2154 | size == 32 ? ".got2" : ".opd", | |
2155 | names, names_size, NULL); | |
c9269dff AM |
2156 | if (s != NULL) |
2157 | { | |
2158 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2159 | this->special_ = ndx; | |
b4f7960d AM |
2160 | if (size == 64) |
2161 | { | |
2162 | if (this->abiversion() == 0) | |
2163 | this->set_abiversion(1); | |
2164 | else if (this->abiversion() > 1) | |
2165 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2166 | this->name().c_str(), this->abiversion()); | |
2167 | } | |
c9269dff | 2168 | } |
5edad15d AM |
2169 | if (size == 64) |
2170 | { | |
2171 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", | |
2172 | names, names_size, NULL); | |
2173 | if (s != NULL) | |
2174 | { | |
2175 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; | |
2176 | this->relatoc_ = ndx; | |
2177 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2178 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); | |
2179 | } | |
2180 | } | |
c9269dff AM |
2181 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
2182 | } | |
2183 | ||
2184 | // Examine .rela.opd to build info about function entry points. | |
2185 | ||
2186 | template<int size, bool big_endian> | |
2187 | void | |
2188 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( | |
2189 | size_t reloc_count, | |
2190 | const unsigned char* prelocs, | |
2191 | const unsigned char* plocal_syms) | |
2192 | { | |
2193 | if (size == 64) | |
cf43a2fe | 2194 | { |
0e123f69 AM |
2195 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
2196 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
c9269dff | 2197 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
ec4dbad3 AM |
2198 | Address expected_off = 0; |
2199 | bool regular = true; | |
2200 | unsigned int opd_ent_size = 0; | |
c9269dff AM |
2201 | |
2202 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
cf43a2fe | 2203 | { |
c9269dff AM |
2204 | Reltype reloc(prelocs); |
2205 | typename elfcpp::Elf_types<size>::Elf_WXword r_info | |
2206 | = reloc.get_r_info(); | |
2207 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
2208 | if (r_type == elfcpp::R_PPC64_ADDR64) | |
2209 | { | |
2210 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
2211 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
2212 | bool is_ordinary; | |
2213 | unsigned int shndx; | |
2214 | if (r_sym < this->local_symbol_count()) | |
2215 | { | |
2216 | typename elfcpp::Sym<size, big_endian> | |
2217 | lsym(plocal_syms + r_sym * sym_size); | |
2218 | shndx = lsym.get_st_shndx(); | |
2219 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
2220 | value = lsym.get_st_value(); | |
2221 | } | |
2222 | else | |
2223 | shndx = this->symbol_section_and_value(r_sym, &value, | |
2224 | &is_ordinary); | |
2225 | this->set_opd_ent(reloc.get_r_offset(), shndx, | |
2226 | value + reloc.get_r_addend()); | |
ec4dbad3 AM |
2227 | if (i == 2) |
2228 | { | |
2229 | expected_off = reloc.get_r_offset(); | |
2230 | opd_ent_size = expected_off; | |
2231 | } | |
2232 | else if (expected_off != reloc.get_r_offset()) | |
2233 | regular = false; | |
2234 | expected_off += opd_ent_size; | |
2235 | } | |
2236 | else if (r_type == elfcpp::R_PPC64_TOC) | |
2237 | { | |
2238 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) | |
2239 | regular = false; | |
2240 | } | |
2241 | else | |
2242 | { | |
2243 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), | |
2244 | this->name().c_str(), r_type); | |
2245 | regular = false; | |
c9269dff AM |
2246 | } |
2247 | } | |
ec4dbad3 AM |
2248 | if (reloc_count <= 2) |
2249 | opd_ent_size = this->section_size(this->opd_shndx()); | |
2250 | if (opd_ent_size != 24 && opd_ent_size != 16) | |
2251 | regular = false; | |
2252 | if (!regular) | |
2253 | { | |
2254 | gold_warning(_("%s: .opd is not a regular array of opd entries"), | |
2255 | this->name().c_str()); | |
2256 | opd_ent_size = 0; | |
2257 | } | |
c9269dff AM |
2258 | } |
2259 | } | |
2260 | ||
5edad15d AM |
2261 | // Returns true if a code sequence loading the TOC entry at VALUE |
2262 | // relative to the TOC pointer can be converted into code calculating | |
2263 | // a TOC pointer relative offset. | |
2264 | // If so, the TOC pointer relative offset is stored to VALUE. | |
2265 | ||
2266 | template<int size, bool big_endian> | |
2267 | bool | |
2268 | Powerpc_relobj<size, big_endian>::make_toc_relative( | |
2269 | Target_powerpc<size, big_endian>* target, | |
2270 | Address* value) | |
2271 | { | |
2272 | if (size != 64) | |
2273 | return false; | |
2274 | ||
e666304e AM |
2275 | // With -mcmodel=medium code it is quite possible to have |
2276 | // toc-relative relocs referring to objects outside the TOC. | |
2277 | // Don't try to look at a non-existent TOC. | |
2278 | if (this->toc_shndx() == 0) | |
2279 | return false; | |
2280 | ||
5edad15d AM |
2281 | // Convert VALUE back to an address by adding got_base (see below), |
2282 | // then to an offset in the TOC by subtracting the TOC output | |
2283 | // section address and the TOC output offset. Since this TOC output | |
2284 | // section and the got output section are one and the same, we can | |
2285 | // omit adding and subtracting the output section address. | |
2286 | Address off = (*value + this->toc_base_offset() | |
2287 | - this->output_section_offset(this->toc_shndx())); | |
2288 | // Is this offset in the TOC? -mcmodel=medium code may be using | |
2289 | // TOC relative access to variables outside the TOC. Those of | |
2290 | // course can't be optimized. We also don't try to optimize code | |
2291 | // that is using a different object's TOC. | |
2292 | if (off >= this->section_size(this->toc_shndx())) | |
2293 | return false; | |
2294 | ||
2295 | if (this->no_toc_opt(off)) | |
2296 | return false; | |
2297 | ||
2298 | section_size_type vlen; | |
2299 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); | |
2300 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); | |
2301 | // The TOC pointer | |
2302 | Address got_base = (target->got_section()->output_section()->address() | |
2303 | + this->toc_base_offset()); | |
2304 | addr -= got_base; | |
857e829e | 2305 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
5edad15d AM |
2306 | return false; |
2307 | ||
2308 | *value = addr; | |
2309 | return true; | |
2310 | } | |
2311 | ||
2312 | // Perform the Sized_relobj_file method, then set up opd info from | |
2313 | // .opd relocs. | |
2314 | ||
c9269dff AM |
2315 | template<int size, bool big_endian> |
2316 | void | |
2317 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) | |
2318 | { | |
2319 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); | |
2320 | if (size == 64) | |
2321 | { | |
2322 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
2323 | p != rd->relocs.end(); | |
2324 | ++p) | |
2325 | { | |
2326 | if (p->data_shndx == this->opd_shndx()) | |
2327 | { | |
ec4dbad3 AM |
2328 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
2329 | gold_assert(opd_size == static_cast<size_t>(opd_size)); | |
2330 | if (opd_size != 0) | |
2331 | { | |
2332 | this->init_opd(opd_size); | |
2333 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), | |
2334 | rd->local_symbols->data()); | |
2335 | } | |
c9269dff AM |
2336 | break; |
2337 | } | |
cf43a2fe AM |
2338 | } |
2339 | } | |
cf43a2fe AM |
2340 | } |
2341 | ||
b4f7960d AM |
2342 | // Read the symbols then set up st_other vector. |
2343 | ||
2344 | template<int size, bool big_endian> | |
2345 | void | |
2346 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2347 | { | |
f35c4853 | 2348 | this->base_read_symbols(sd); |
724436fc AM |
2349 | if (this->input_file()->format() != Input_file::FORMAT_ELF) |
2350 | return; | |
b4f7960d AM |
2351 | if (size == 64) |
2352 | { | |
2353 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2354 | const unsigned char* const pshdrs = sd->section_headers->data(); | |
2355 | const unsigned int loccount = this->do_local_symbol_count(); | |
2356 | if (loccount != 0) | |
2357 | { | |
2358 | this->st_other_.resize(loccount); | |
2359 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2360 | off_t locsize = loccount * sym_size; | |
2361 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
2362 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; | |
2363 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); | |
2364 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), | |
2365 | locsize, true, false); | |
2366 | psyms += sym_size; | |
2367 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
2368 | { | |
2369 | elfcpp::Sym<size, big_endian> sym(psyms); | |
2370 | unsigned char st_other = sym.get_st_other(); | |
2371 | this->st_other_[i] = st_other; | |
2372 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) | |
2373 | { | |
2374 | if (this->abiversion() == 0) | |
2375 | this->set_abiversion(2); | |
2376 | else if (this->abiversion() < 2) | |
2377 | gold_error(_("%s: local symbol %d has invalid st_other" | |
2378 | " for ABI version 1"), | |
2379 | this->name().c_str(), i); | |
2380 | } | |
2381 | } | |
2382 | } | |
2383 | } | |
724436fc AM |
2384 | |
2385 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2386 | const unsigned char* ps = sd->section_headers->data() + shdr_size; | |
2387 | bool merge_attributes = false; | |
2388 | for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size) | |
2389 | { | |
2390 | elfcpp::Shdr<size, big_endian> shdr(ps); | |
2391 | switch (shdr.get_sh_type()) | |
2392 | { | |
2393 | case elfcpp::SHT_GNU_ATTRIBUTES: | |
2394 | { | |
2395 | gold_assert(this->attributes_section_data_ == NULL); | |
2396 | section_offset_type section_offset = shdr.get_sh_offset(); | |
2397 | section_size_type section_size = | |
2398 | convert_to_section_size_type(shdr.get_sh_size()); | |
2399 | const unsigned char* view = | |
2400 | this->get_view(section_offset, section_size, true, false); | |
2401 | this->attributes_section_data_ = | |
2402 | new Attributes_section_data(view, section_size); | |
2403 | } | |
2404 | break; | |
2405 | ||
2406 | case elfcpp::SHT_SYMTAB: | |
2407 | { | |
2408 | // Sometimes an object has no contents except the section | |
2409 | // name string table and an empty symbol table with the | |
2410 | // undefined symbol. We don't want to merge | |
2411 | // processor-specific flags from such an object. | |
2412 | const typename elfcpp::Elf_types<size>::Elf_WXword sym_size = | |
2413 | elfcpp::Elf_sizes<size>::sym_size; | |
2414 | if (shdr.get_sh_size() > sym_size) | |
2415 | merge_attributes = true; | |
2416 | } | |
2417 | break; | |
2418 | ||
2419 | case elfcpp::SHT_STRTAB: | |
2420 | break; | |
2421 | ||
2422 | default: | |
2423 | merge_attributes = true; | |
2424 | break; | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | if (!merge_attributes) | |
2429 | { | |
2430 | // Should rarely happen. | |
2431 | delete this->attributes_section_data_; | |
2432 | this->attributes_section_data_ = NULL; | |
2433 | } | |
b4f7960d AM |
2434 | } |
2435 | ||
2436 | template<int size, bool big_endian> | |
2437 | void | |
2438 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) | |
2439 | { | |
2440 | this->e_flags_ |= ver; | |
2441 | if (this->abiversion() != 0) | |
2442 | { | |
2443 | Target_powerpc<size, big_endian>* target = | |
2444 | static_cast<Target_powerpc<size, big_endian>*>( | |
2445 | parameters->sized_target<size, big_endian>()); | |
2446 | if (target->abiversion() == 0) | |
2447 | target->set_abiversion(this->abiversion()); | |
2448 | else if (target->abiversion() != this->abiversion()) | |
2449 | gold_error(_("%s: ABI version %d is not compatible " | |
2450 | "with ABI version %d output"), | |
2451 | this->name().c_str(), | |
2452 | this->abiversion(), target->abiversion()); | |
2453 | ||
2454 | } | |
2455 | } | |
2456 | ||
f35c4853 | 2457 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
dc3714f3 AM |
2458 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
2459 | ||
2460 | template<int size, bool big_endian> | |
2461 | void | |
2462 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
2463 | { | |
f35c4853 | 2464 | this->base_read_symbols(sd); |
724436fc AM |
2465 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
2466 | const unsigned char* ps = | |
2467 | sd->section_headers->data() + shdr_size * (this->shnum() - 1); | |
2468 | for (unsigned int i = this->shnum(); i > 0; --i, ps -= shdr_size) | |
2469 | { | |
2470 | elfcpp::Shdr<size, big_endian> shdr(ps); | |
2471 | if (shdr.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES) | |
2472 | { | |
2473 | section_offset_type section_offset = shdr.get_sh_offset(); | |
2474 | section_size_type section_size = | |
2475 | convert_to_section_size_type(shdr.get_sh_size()); | |
2476 | const unsigned char* view = | |
2477 | this->get_view(section_offset, section_size, true, false); | |
2478 | this->attributes_section_data_ = | |
2479 | new Attributes_section_data(view, section_size); | |
2480 | break; | |
2481 | } | |
2482 | } | |
dc3714f3 AM |
2483 | if (size == 64) |
2484 | { | |
dc3714f3 AM |
2485 | const unsigned char* const pshdrs = sd->section_headers->data(); |
2486 | const unsigned char* namesu = sd->section_names->data(); | |
2487 | const char* names = reinterpret_cast<const char*>(namesu); | |
2488 | const unsigned char* s = NULL; | |
2489 | const unsigned char* opd; | |
2490 | section_size_type opd_size; | |
2491 | ||
2492 | // Find and read .opd section. | |
2493 | while (1) | |
2494 | { | |
2495 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, | |
2496 | sd->section_names_size, | |
2497 | s); | |
2498 | if (s == NULL) | |
2499 | return; | |
2500 | ||
2501 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2502 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2503 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
2504 | { | |
b4f7960d AM |
2505 | if (this->abiversion() == 0) |
2506 | this->set_abiversion(1); | |
2507 | else if (this->abiversion() > 1) | |
2508 | gold_error(_("%s: .opd invalid in abiv%d"), | |
2509 | this->name().c_str(), this->abiversion()); | |
2510 | ||
dc3714f3 AM |
2511 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
2512 | this->opd_address_ = shdr.get_sh_addr(); | |
2513 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); | |
2514 | opd = this->get_view(shdr.get_sh_offset(), opd_size, | |
2515 | true, false); | |
2516 | break; | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | // Build set of executable sections. | |
2521 | // Using a set is probably overkill. There is likely to be only | |
2522 | // a few executable sections, typically .init, .text and .fini, | |
2523 | // and they are generally grouped together. | |
2524 | typedef std::set<Sec_info> Exec_sections; | |
2525 | Exec_sections exec_sections; | |
2526 | s = pshdrs; | |
2527 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) | |
2528 | { | |
2529 | typename elfcpp::Shdr<size, big_endian> shdr(s); | |
2530 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
2531 | && ((shdr.get_sh_flags() | |
2532 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2533 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) | |
2534 | && shdr.get_sh_size() != 0) | |
2535 | { | |
2536 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), | |
2537 | shdr.get_sh_size(), i)); | |
2538 | } | |
2539 | } | |
2540 | if (exec_sections.empty()) | |
2541 | return; | |
2542 | ||
2543 | // Look over the OPD entries. This is complicated by the fact | |
2544 | // that some binaries will use two-word entries while others | |
2545 | // will use the standard three-word entries. In most cases | |
2546 | // the third word (the environment pointer for languages like | |
2547 | // Pascal) is unused and will be zero. If the third word is | |
2548 | // used it should not be pointing into executable sections, | |
2549 | // I think. | |
2550 | this->init_opd(opd_size); | |
2551 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) | |
2552 | { | |
2553 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; | |
2554 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); | |
2555 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); | |
2556 | if (val == 0) | |
2557 | // Chances are that this is the third word of an OPD entry. | |
2558 | continue; | |
2559 | typename Exec_sections::const_iterator e | |
2560 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); | |
2561 | if (e != exec_sections.begin()) | |
2562 | { | |
2563 | --e; | |
2564 | if (e->start <= val && val < e->start + e->len) | |
2565 | { | |
2566 | // We have an address in an executable section. | |
2567 | // VAL ought to be the function entry, set it up. | |
2568 | this->set_opd_ent(p - opd, e->shndx, val); | |
2569 | // Skip second word of OPD entry, the TOC pointer. | |
2570 | p += 8; | |
2571 | } | |
2572 | } | |
2573 | // If we didn't match any executable sections, we likely | |
2574 | // have a non-zero third word in the OPD entry. | |
2575 | } | |
2576 | } | |
2577 | } | |
2578 | ||
5edad15d AM |
2579 | // Relocate sections. |
2580 | ||
2581 | template<int size, bool big_endian> | |
2582 | void | |
2583 | Powerpc_relobj<size, big_endian>::do_relocate_sections( | |
2584 | const Symbol_table* symtab, const Layout* layout, | |
2585 | const unsigned char* pshdrs, Output_file* of, | |
2586 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2587 | { | |
2588 | unsigned int start = 1; | |
2589 | if (size == 64 | |
2590 | && this->relatoc_ != 0 | |
2591 | && !parameters->options().relocatable()) | |
2592 | { | |
2593 | // Relocate .toc first. | |
2594 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2595 | this->relatoc_, this->relatoc_); | |
2596 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2597 | 1, this->relatoc_ - 1); | |
2598 | start = this->relatoc_ + 1; | |
2599 | } | |
2600 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2601 | start, this->shnum() - 1); | |
2d7ad24e AM |
2602 | |
2603 | if (!parameters->options().output_is_position_independent()) | |
2604 | { | |
2605 | Target_powerpc<size, big_endian>* target | |
2606 | = static_cast<Target_powerpc<size, big_endian>*>( | |
2607 | parameters->sized_target<size, big_endian>()); | |
2608 | if (target->lplt_section() && target->lplt_section()->data_size() != 0) | |
2609 | { | |
2610 | const section_size_type offset = target->lplt_section()->offset(); | |
2611 | const section_size_type oview_size | |
2612 | = convert_to_section_size_type(target->lplt_section()->data_size()); | |
2613 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
2614 | ||
2615 | bool modified = false; | |
2616 | unsigned int nsyms = this->local_symbol_count(); | |
2617 | for (unsigned int i = 0; i < nsyms; i++) | |
2618 | if (this->local_has_plt_offset(i)) | |
2619 | { | |
2620 | Address value = this->local_symbol_value(i, 0); | |
2621 | if (size == 64) | |
2622 | value += ppc64_local_entry_offset(i); | |
2623 | size_t off = this->local_plt_offset(i); | |
2624 | elfcpp::Swap<size, big_endian>::writeval(oview + off, value); | |
2625 | modified = true; | |
2626 | } | |
2627 | if (modified) | |
2628 | of->write_output_view(offset, oview_size, oview); | |
2629 | } | |
2630 | } | |
5edad15d AM |
2631 | } |
2632 | ||
f43ba157 | 2633 | // Set up some symbols. |
26a4e9cb AM |
2634 | |
2635 | template<int size, bool big_endian> | |
2636 | void | |
f43ba157 AM |
2637 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
2638 | Symbol_table* symtab, | |
2639 | Layout* layout) | |
26a4e9cb AM |
2640 | { |
2641 | if (size == 32) | |
2642 | { | |
bb66a627 AM |
2643 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
2644 | // undefined when scanning relocs (and thus requires | |
26a4e9cb AM |
2645 | // non-relative dynamic relocs). The proper value will be |
2646 | // updated later. | |
2647 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); | |
2648 | if (gotsym != NULL && gotsym->is_undefined()) | |
2649 | { | |
2650 | Target_powerpc<size, big_endian>* target = | |
2651 | static_cast<Target_powerpc<size, big_endian>*>( | |
2652 | parameters->sized_target<size, big_endian>()); | |
2653 | Output_data_got_powerpc<size, big_endian>* got | |
2654 | = target->got_section(symtab, layout); | |
2655 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2656 | Symbol_table::PREDEFINED, | |
2657 | got, 0, 0, | |
2658 | elfcpp::STT_OBJECT, | |
bb66a627 | 2659 | elfcpp::STB_LOCAL, |
26a4e9cb AM |
2660 | elfcpp::STV_HIDDEN, 0, |
2661 | false, false); | |
2662 | } | |
2663 | ||
2664 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. | |
2665 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); | |
2666 | if (sdasym != NULL && sdasym->is_undefined()) | |
2667 | { | |
2668 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); | |
2669 | Output_section* os | |
2670 | = layout->add_output_section_data(".sdata", 0, | |
2671 | elfcpp::SHF_ALLOC | |
2672 | | elfcpp::SHF_WRITE, | |
2673 | sdata, ORDER_SMALL_DATA, false); | |
2674 | symtab->define_in_output_data("_SDA_BASE_", NULL, | |
2675 | Symbol_table::PREDEFINED, | |
2676 | os, 32768, 0, elfcpp::STT_OBJECT, | |
2677 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, | |
2678 | 0, false, false); | |
2679 | } | |
2680 | } | |
b4f7960d AM |
2681 | else |
2682 | { | |
2683 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ | |
2684 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); | |
2685 | if (gotsym != NULL && gotsym->is_undefined()) | |
2686 | { | |
2687 | Target_powerpc<size, big_endian>* target = | |
2688 | static_cast<Target_powerpc<size, big_endian>*>( | |
2689 | parameters->sized_target<size, big_endian>()); | |
2690 | Output_data_got_powerpc<size, big_endian>* got | |
2691 | = target->got_section(symtab, layout); | |
2692 | symtab->define_in_output_data(".TOC.", NULL, | |
2693 | Symbol_table::PREDEFINED, | |
2694 | got, 0x8000, 0, | |
2695 | elfcpp::STT_OBJECT, | |
2696 | elfcpp::STB_LOCAL, | |
2697 | elfcpp::STV_HIDDEN, 0, | |
2698 | false, false); | |
2699 | } | |
2700 | } | |
34e0882b AM |
2701 | |
2702 | this->tls_get_addr_ = symtab->lookup("__tls_get_addr"); | |
2703 | if (parameters->options().tls_get_addr_optimize() | |
2704 | && this->tls_get_addr_ != NULL | |
2705 | && this->tls_get_addr_->in_reg()) | |
2706 | this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt"); | |
2707 | if (this->tls_get_addr_opt_ != NULL) | |
2708 | { | |
2709 | if (this->tls_get_addr_->is_undefined() | |
2710 | || this->tls_get_addr_->is_from_dynobj()) | |
2711 | { | |
2712 | // Make it seem as if references to __tls_get_addr are | |
2713 | // really to __tls_get_addr_opt, so the latter symbol is | |
2714 | // made dynamic, not the former. | |
2715 | this->tls_get_addr_->clear_in_reg(); | |
2716 | this->tls_get_addr_opt_->set_in_reg(); | |
2717 | } | |
2718 | // We have a non-dynamic definition for __tls_get_addr. | |
2719 | // Make __tls_get_addr_opt the same, if it does not already have | |
2720 | // a non-dynamic definition. | |
2721 | else if (this->tls_get_addr_opt_->is_undefined() | |
2722 | || this->tls_get_addr_opt_->is_from_dynobj()) | |
2723 | { | |
2724 | Sized_symbol<size>* from | |
2725 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_); | |
2726 | Sized_symbol<size>* to | |
2727 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_); | |
2728 | symtab->clone<size>(to, from); | |
2729 | } | |
2730 | } | |
26a4e9cb AM |
2731 | } |
2732 | ||
cf43a2fe AM |
2733 | // Set up PowerPC target specific relobj. |
2734 | ||
2735 | template<int size, bool big_endian> | |
2736 | Object* | |
2737 | Target_powerpc<size, big_endian>::do_make_elf_object( | |
2738 | const std::string& name, | |
2739 | Input_file* input_file, | |
2740 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
2741 | { | |
2742 | int et = ehdr.get_e_type(); | |
957564c9 AS |
2743 | // ET_EXEC files are valid input for --just-symbols/-R, |
2744 | // and we treat them as relocatable objects. | |
2745 | if (et == elfcpp::ET_REL | |
2746 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
cf43a2fe AM |
2747 | { |
2748 | Powerpc_relobj<size, big_endian>* obj = | |
c9269dff | 2749 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
cf43a2fe AM |
2750 | obj->setup(); |
2751 | return obj; | |
2752 | } | |
2753 | else if (et == elfcpp::ET_DYN) | |
2754 | { | |
dc3714f3 AM |
2755 | Powerpc_dynobj<size, big_endian>* obj = |
2756 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
cf43a2fe AM |
2757 | obj->setup(); |
2758 | return obj; | |
2759 | } | |
2760 | else | |
2761 | { | |
c9269dff | 2762 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
cf43a2fe AM |
2763 | return NULL; |
2764 | } | |
2765 | } | |
2766 | ||
2767 | template<int size, bool big_endian> | |
2768 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> | |
2769 | { | |
2770 | public: | |
2771 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
2772 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; | |
2773 | ||
2774 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) | |
2775 | : Output_data_got<size, big_endian>(), | |
2776 | symtab_(symtab), layout_(layout), | |
2777 | header_ent_cnt_(size == 32 ? 3 : 1), | |
2778 | header_index_(size == 32 ? 0x2000 : 0) | |
751e4d66 AM |
2779 | { |
2780 | if (size == 64) | |
2781 | this->set_addralign(256); | |
2782 | } | |
cf43a2fe | 2783 | |
e84fe78f AM |
2784 | // Override all the Output_data_got methods we use so as to first call |
2785 | // reserve_ent(). | |
2786 | bool | |
2787 | add_global(Symbol* gsym, unsigned int got_type) | |
2788 | { | |
2789 | this->reserve_ent(); | |
2790 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); | |
2791 | } | |
2792 | ||
2793 | bool | |
2794 | add_global_plt(Symbol* gsym, unsigned int got_type) | |
2795 | { | |
2796 | this->reserve_ent(); | |
2797 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); | |
2798 | } | |
2799 | ||
2800 | bool | |
2801 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2802 | { return this->add_global_plt(gsym, got_type); } | |
2803 | ||
2804 | void | |
2805 | add_global_with_rel(Symbol* gsym, unsigned int got_type, | |
2806 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) | |
2807 | { | |
2808 | this->reserve_ent(); | |
2809 | Output_data_got<size, big_endian>:: | |
2810 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); | |
2811 | } | |
2812 | ||
2813 | void | |
2814 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
2815 | Output_data_reloc_generic* rel_dyn, | |
2816 | unsigned int r_type_1, unsigned int r_type_2) | |
2817 | { | |
aacb3b6d AM |
2818 | if (gsym->has_got_offset(got_type)) |
2819 | return; | |
2820 | ||
e84fe78f AM |
2821 | this->reserve_ent(2); |
2822 | Output_data_got<size, big_endian>:: | |
2823 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); | |
2824 | } | |
2825 | ||
2826 | bool | |
2827 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2828 | { | |
2829 | this->reserve_ent(); | |
2830 | return Output_data_got<size, big_endian>::add_local(object, sym_index, | |
2831 | got_type); | |
2832 | } | |
2833 | ||
2834 | bool | |
2835 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2836 | { | |
2837 | this->reserve_ent(); | |
2838 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, | |
2839 | got_type); | |
2840 | } | |
2841 | ||
2842 | bool | |
2843 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2844 | { return this->add_local_plt(object, sym_index, got_type); } | |
2845 | ||
2846 | void | |
2847 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2848 | unsigned int got_type, | |
2849 | Output_data_reloc_generic* rel_dyn, | |
2850 | unsigned int r_type) | |
2851 | { | |
aacb3b6d AM |
2852 | if (object->local_has_got_offset(sym_index, got_type)) |
2853 | return; | |
2854 | ||
e84fe78f AM |
2855 | this->reserve_ent(2); |
2856 | Output_data_got<size, big_endian>:: | |
2857 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); | |
2858 | } | |
2859 | ||
2860 | unsigned int | |
2861 | add_constant(Valtype constant) | |
2862 | { | |
2863 | this->reserve_ent(); | |
2864 | return Output_data_got<size, big_endian>::add_constant(constant); | |
2865 | } | |
2866 | ||
dd93cd0a AM |
2867 | unsigned int |
2868 | add_constant_pair(Valtype c1, Valtype c2) | |
2869 | { | |
2870 | this->reserve_ent(2); | |
e84fe78f | 2871 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
dd93cd0a AM |
2872 | } |
2873 | ||
2874 | // Offset of _GLOBAL_OFFSET_TABLE_. | |
cf43a2fe AM |
2875 | unsigned int |
2876 | g_o_t() const | |
2877 | { | |
2878 | return this->got_offset(this->header_index_); | |
42cacb20 | 2879 | } |
cf43a2fe | 2880 | |
dd93cd0a AM |
2881 | // Offset of base used to access the GOT/TOC. |
2882 | // The got/toc pointer reg will be set to this value. | |
26a4e9cb | 2883 | Valtype |
dd93cd0a AM |
2884 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
2885 | { | |
2886 | if (size == 32) | |
2887 | return this->g_o_t(); | |
2888 | else | |
2889 | return (this->output_section()->address() | |
2890 | + object->toc_base_offset() | |
2891 | - this->address()); | |
2892 | } | |
2893 | ||
cf43a2fe AM |
2894 | // Ensure our GOT has a header. |
2895 | void | |
2896 | set_final_data_size() | |
2897 | { | |
2898 | if (this->header_ent_cnt_ != 0) | |
2899 | this->make_header(); | |
2900 | Output_data_got<size, big_endian>::set_final_data_size(); | |
2901 | } | |
2902 | ||
2903 | // First word of GOT header needs some values that are not | |
2904 | // handled by Output_data_got so poke them in here. | |
2905 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. | |
2906 | void | |
2907 | do_write(Output_file* of) | |
2908 | { | |
c9824451 AM |
2909 | Valtype val = 0; |
2910 | if (size == 32 && this->layout_->dynamic_data() != NULL) | |
2911 | val = this->layout_->dynamic_section()->address(); | |
2912 | if (size == 64) | |
2913 | val = this->output_section()->address() + 0x8000; | |
2914 | this->replace_constant(this->header_index_, val); | |
cf43a2fe AM |
2915 | Output_data_got<size, big_endian>::do_write(of); |
2916 | } | |
2917 | ||
2918 | private: | |
2919 | void | |
2920 | reserve_ent(unsigned int cnt = 1) | |
2921 | { | |
2922 | if (this->header_ent_cnt_ == 0) | |
2923 | return; | |
2924 | if (this->num_entries() + cnt > this->header_index_) | |
2925 | this->make_header(); | |
2926 | } | |
2927 | ||
2928 | void | |
2929 | make_header() | |
2930 | { | |
2931 | this->header_ent_cnt_ = 0; | |
2932 | this->header_index_ = this->num_entries(); | |
2933 | if (size == 32) | |
2934 | { | |
2935 | Output_data_got<size, big_endian>::add_constant(0); | |
2936 | Output_data_got<size, big_endian>::add_constant(0); | |
2937 | Output_data_got<size, big_endian>::add_constant(0); | |
2938 | ||
2939 | // Define _GLOBAL_OFFSET_TABLE_ at the header | |
bb66a627 AM |
2940 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
2941 | if (gotsym != NULL) | |
2942 | { | |
2943 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); | |
2944 | sym->set_value(this->g_o_t()); | |
2945 | } | |
2946 | else | |
2947 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
2948 | Symbol_table::PREDEFINED, | |
2949 | this, this->g_o_t(), 0, | |
2950 | elfcpp::STT_OBJECT, | |
2951 | elfcpp::STB_LOCAL, | |
2952 | elfcpp::STV_HIDDEN, 0, | |
2953 | false, false); | |
cf43a2fe AM |
2954 | } |
2955 | else | |
2956 | Output_data_got<size, big_endian>::add_constant(0); | |
2957 | } | |
2958 | ||
2959 | // Stashed pointers. | |
2960 | Symbol_table* symtab_; | |
2961 | Layout* layout_; | |
2962 | ||
2963 | // GOT header size. | |
2964 | unsigned int header_ent_cnt_; | |
2965 | // GOT header index. | |
2966 | unsigned int header_index_; | |
42cacb20 DE |
2967 | }; |
2968 | ||
2969 | // Get the GOT section, creating it if necessary. | |
2970 | ||
2971 | template<int size, bool big_endian> | |
cf43a2fe | 2972 | Output_data_got_powerpc<size, big_endian>* |
42cacb20 DE |
2973 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
2974 | Layout* layout) | |
2975 | { | |
2976 | if (this->got_ == NULL) | |
2977 | { | |
2978 | gold_assert(symtab != NULL && layout != NULL); | |
2979 | ||
cf43a2fe AM |
2980 | this->got_ |
2981 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); | |
42cacb20 DE |
2982 | |
2983 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
2984 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
22f0da72 | 2985 | this->got_, ORDER_DATA, false); |
42cacb20 DE |
2986 | } |
2987 | ||
2988 | return this->got_; | |
2989 | } | |
2990 | ||
2991 | // Get the dynamic reloc section, creating it if necessary. | |
2992 | ||
2993 | template<int size, bool big_endian> | |
2994 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
2995 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) | |
2996 | { | |
2997 | if (this->rela_dyn_ == NULL) | |
2998 | { | |
2999 | gold_assert(layout != NULL); | |
3000 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
3001 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
22f0da72 ILT |
3002 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
3003 | ORDER_DYNAMIC_RELOCS, false); | |
42cacb20 DE |
3004 | } |
3005 | return this->rela_dyn_; | |
3006 | } | |
3007 | ||
b3ccdeb5 AM |
3008 | // Similarly, but for ifunc symbols get the one for ifunc. |
3009 | ||
3010 | template<int size, bool big_endian> | |
3011 | typename Target_powerpc<size, big_endian>::Reloc_section* | |
3012 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, | |
3013 | Layout* layout, | |
3014 | bool for_ifunc) | |
3015 | { | |
3016 | if (!for_ifunc) | |
3017 | return this->rela_dyn_section(layout); | |
3018 | ||
3019 | if (this->iplt_ == NULL) | |
3020 | this->make_iplt_section(symtab, layout); | |
3021 | return this->iplt_->rel_plt(); | |
3022 | } | |
3023 | ||
ec661b9d AM |
3024 | class Stub_control |
3025 | { | |
3026 | public: | |
3027 | // Determine the stub group size. The group size is the absolute | |
3028 | // value of the parameter --stub-group-size. If --stub-group-size | |
a5018ae5 | 3029 | // is passed a negative value, we restrict stubs to be always after |
ec661b9d | 3030 | // the stubbed branches. |
1c3a5fbe AM |
3031 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
3032 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), | |
3033 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), | |
3034 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), | |
3035 | owner_(NULL), output_section_(NULL) | |
ec661b9d | 3036 | { |
ec661b9d AM |
3037 | } |
3038 | ||
3039 | // Return true iff input section can be handled by current stub | |
3040 | // group. | |
3041 | bool | |
3042 | can_add_to_stub_group(Output_section* o, | |
3043 | const Output_section::Input_section* i, | |
3044 | bool has14); | |
3045 | ||
3046 | const Output_section::Input_section* | |
3047 | owner() | |
3048 | { return owner_; } | |
3049 | ||
3050 | Output_section* | |
3051 | output_section() | |
3052 | { return output_section_; } | |
3053 | ||
a20605cf AM |
3054 | void |
3055 | set_output_and_owner(Output_section* o, | |
3056 | const Output_section::Input_section* i) | |
3057 | { | |
3058 | this->output_section_ = o; | |
3059 | this->owner_ = i; | |
3060 | } | |
3061 | ||
ec661b9d AM |
3062 | private: |
3063 | typedef enum | |
3064 | { | |
1c3a5fbe | 3065 | // Initial state. |
ec661b9d | 3066 | NO_GROUP, |
1c3a5fbe | 3067 | // Adding group sections before the stubs. |
ec661b9d | 3068 | FINDING_STUB_SECTION, |
1c3a5fbe | 3069 | // Adding group sections after the stubs. |
ec661b9d AM |
3070 | HAS_STUB_SECTION |
3071 | } State; | |
3072 | ||
ec661b9d | 3073 | uint32_t stub_group_size_; |
a5018ae5 | 3074 | bool stubs_always_after_branch_; |
ec661b9d | 3075 | bool suppress_size_errors_; |
1c3a5fbe AM |
3076 | // True if a stub group can serve multiple output sections. |
3077 | bool multi_os_; | |
3078 | State state_; | |
8a37735f AM |
3079 | // Current max size of group. Starts at stub_group_size_ but is |
3080 | // reduced to stub_group_size_/1024 on seeing a section with | |
3081 | // external conditional branches. | |
3082 | uint32_t group_size_; | |
a5018ae5 | 3083 | uint64_t group_start_addr_; |
57f6d32d AM |
3084 | // owner_ and output_section_ specify the section to which stubs are |
3085 | // attached. The stubs are placed at the end of this section. | |
ec661b9d AM |
3086 | const Output_section::Input_section* owner_; |
3087 | Output_section* output_section_; | |
3088 | }; | |
3089 | ||
0cfdc767 | 3090 | // Return true iff input section can be handled by current stub |
a5018ae5 AM |
3091 | // group. Sections are presented to this function in order, |
3092 | // so the first section is the head of the group. | |
ec661b9d AM |
3093 | |
3094 | bool | |
3095 | Stub_control::can_add_to_stub_group(Output_section* o, | |
3096 | const Output_section::Input_section* i, | |
3097 | bool has14) | |
3098 | { | |
ec661b9d AM |
3099 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
3100 | uint64_t this_size; | |
3101 | uint64_t start_addr = o->address(); | |
3102 | ||
3103 | if (whole_sec) | |
3104 | // .init and .fini sections are pasted together to form a single | |
3105 | // function. We can't be adding stubs in the middle of the function. | |
3106 | this_size = o->data_size(); | |
3107 | else | |
3108 | { | |
3109 | start_addr += i->relobj()->output_section_offset(i->shndx()); | |
3110 | this_size = i->data_size(); | |
3111 | } | |
57f6d32d | 3112 | |
a5018ae5 | 3113 | uint64_t end_addr = start_addr + this_size; |
8a37735f AM |
3114 | uint32_t group_size = this->stub_group_size_; |
3115 | if (has14) | |
3116 | this->group_size_ = group_size = group_size >> 10; | |
ec661b9d | 3117 | |
57f6d32d | 3118 | if (this_size > group_size && !this->suppress_size_errors_) |
ec661b9d AM |
3119 | gold_warning(_("%s:%s exceeds group size"), |
3120 | i->relobj()->name().c_str(), | |
3121 | i->relobj()->section_name(i->shndx()).c_str()); | |
3122 | ||
afe002dd AM |
3123 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
3124 | has14 ? " 14bit" : "", | |
3125 | i->relobj()->name().c_str(), | |
3126 | i->relobj()->section_name(i->shndx()).c_str(), | |
3127 | (long long) this_size, | |
a5018ae5 AM |
3128 | (this->state_ == NO_GROUP |
3129 | ? this_size | |
3130 | : (long long) end_addr - this->group_start_addr_)); | |
afe002dd | 3131 | |
1c3a5fbe AM |
3132 | if (this->state_ == NO_GROUP) |
3133 | { | |
3134 | // Only here on very first use of Stub_control | |
3135 | this->owner_ = i; | |
3136 | this->output_section_ = o; | |
3137 | this->state_ = FINDING_STUB_SECTION; | |
3138 | this->group_size_ = group_size; | |
3139 | this->group_start_addr_ = start_addr; | |
3140 | return true; | |
3141 | } | |
3142 | else if (!this->multi_os_ && this->output_section_ != o) | |
3143 | ; | |
3144 | else if (this->state_ == HAS_STUB_SECTION) | |
ec661b9d | 3145 | { |
a5018ae5 | 3146 | // Can we add this section, which is after the stubs, to the |
57f6d32d | 3147 | // group? |
a5018ae5 | 3148 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
57f6d32d | 3149 | return true; |
ec661b9d | 3150 | } |
a5018ae5 | 3151 | else if (this->state_ == FINDING_STUB_SECTION) |
ec661b9d | 3152 | { |
a5018ae5 AM |
3153 | if ((whole_sec && this->output_section_ == o) |
3154 | || end_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 3155 | { |
a5018ae5 | 3156 | // Stubs are added at the end of "owner_". |
57f6d32d AM |
3157 | this->owner_ = i; |
3158 | this->output_section_ = o; | |
a5018ae5 | 3159 | return true; |
57f6d32d | 3160 | } |
a5018ae5 AM |
3161 | // The group before the stubs has reached maximum size. |
3162 | // Now see about adding sections after the stubs to the | |
3163 | // group. If the current section has a 14-bit branch and | |
3164 | // the group before the stubs exceeds group_size_ (because | |
3165 | // they didn't have 14-bit branches), don't add sections | |
3166 | // after the stubs: The size of stubs for such a large | |
3167 | // group may exceed the reach of a 14-bit branch. | |
3168 | if (!this->stubs_always_after_branch_ | |
3169 | && this_size <= this->group_size_ | |
3170 | && start_addr - this->group_start_addr_ <= this->group_size_) | |
57f6d32d | 3171 | { |
a5018ae5 AM |
3172 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
3173 | this->state_ = HAS_STUB_SECTION; | |
3174 | this->group_start_addr_ = start_addr; | |
57f6d32d AM |
3175 | return true; |
3176 | } | |
ec661b9d | 3177 | } |
a5018ae5 AM |
3178 | else |
3179 | gold_unreachable(); | |
57f6d32d | 3180 | |
1c3a5fbe AM |
3181 | gold_debug(DEBUG_TARGET, |
3182 | !this->multi_os_ && this->output_section_ != o | |
3183 | ? "nope, new output section\n" | |
3184 | : "nope, didn't fit\n"); | |
afe002dd | 3185 | |
57f6d32d AM |
3186 | // The section fails to fit in the current group. Set up a few |
3187 | // things for the next group. owner_ and output_section_ will be | |
3188 | // set later after we've retrieved those values for the current | |
3189 | // group. | |
3190 | this->state_ = FINDING_STUB_SECTION; | |
8a37735f | 3191 | this->group_size_ = group_size; |
a5018ae5 | 3192 | this->group_start_addr_ = start_addr; |
57f6d32d | 3193 | return false; |
ec661b9d AM |
3194 | } |
3195 | ||
3196 | // Look over all the input sections, deciding where to place stubs. | |
3197 | ||
3198 | template<int size, bool big_endian> | |
3199 | void | |
3200 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, | |
a3e60ddb AM |
3201 | const Task*, |
3202 | bool no_size_errors) | |
ec661b9d | 3203 | { |
1c3a5fbe AM |
3204 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
3205 | parameters->options().stub_group_multi()); | |
ec661b9d AM |
3206 | |
3207 | // Group input sections and insert stub table | |
a3e60ddb AM |
3208 | Stub_table_owner* table_owner = NULL; |
3209 | std::vector<Stub_table_owner*> tables; | |
ec661b9d AM |
3210 | Layout::Section_list section_list; |
3211 | layout->get_executable_sections(§ion_list); | |
3212 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); | |
a5018ae5 AM |
3213 | for (Layout::Section_list::iterator o = section_list.begin(); |
3214 | o != section_list.end(); | |
ec661b9d AM |
3215 | ++o) |
3216 | { | |
3217 | typedef Output_section::Input_section_list Input_section_list; | |
a5018ae5 AM |
3218 | for (Input_section_list::const_iterator i |
3219 | = (*o)->input_sections().begin(); | |
3220 | i != (*o)->input_sections().end(); | |
ec661b9d AM |
3221 | ++i) |
3222 | { | |
a3e60ddb AM |
3223 | if (i->is_input_section() |
3224 | || i->is_relaxed_input_section()) | |
ec661b9d AM |
3225 | { |
3226 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
3227 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); | |
3228 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); | |
3229 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) | |
3230 | { | |
a3e60ddb AM |
3231 | table_owner->output_section = stub_control.output_section(); |
3232 | table_owner->owner = stub_control.owner(); | |
a20605cf | 3233 | stub_control.set_output_and_owner(*o, &*i); |
a3e60ddb | 3234 | table_owner = NULL; |
ec661b9d | 3235 | } |
a3e60ddb AM |
3236 | if (table_owner == NULL) |
3237 | { | |
3238 | table_owner = new Stub_table_owner; | |
3239 | tables.push_back(table_owner); | |
3240 | } | |
3241 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); | |
ec661b9d AM |
3242 | } |
3243 | } | |
3244 | } | |
a3e60ddb | 3245 | if (table_owner != NULL) |
0cfdc767 | 3246 | { |
a5018ae5 AM |
3247 | table_owner->output_section = stub_control.output_section(); |
3248 | table_owner->owner = stub_control.owner();; | |
a3e60ddb AM |
3249 | } |
3250 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); | |
3251 | t != tables.end(); | |
3252 | ++t) | |
3253 | { | |
3254 | Stub_table<size, big_endian>* stub_table; | |
3255 | ||
3256 | if ((*t)->owner->is_input_section()) | |
3257 | stub_table = new Stub_table<size, big_endian>(this, | |
3258 | (*t)->output_section, | |
590b87ff AM |
3259 | (*t)->owner, |
3260 | this->stub_tables_.size()); | |
a3e60ddb AM |
3261 | else if ((*t)->owner->is_relaxed_input_section()) |
3262 | stub_table = static_cast<Stub_table<size, big_endian>*>( | |
3263 | (*t)->owner->relaxed_input_section()); | |
0cfdc767 | 3264 | else |
a3e60ddb AM |
3265 | gold_unreachable(); |
3266 | this->stub_tables_.push_back(stub_table); | |
3267 | delete *t; | |
0cfdc767 | 3268 | } |
ec661b9d AM |
3269 | } |
3270 | ||
a3e60ddb AM |
3271 | static unsigned long |
3272 | max_branch_delta (unsigned int r_type) | |
3273 | { | |
3274 | if (r_type == elfcpp::R_POWERPC_REL14 | |
3275 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN | |
3276 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) | |
3277 | return 1L << 15; | |
3278 | if (r_type == elfcpp::R_POWERPC_REL24 | |
3279 | || r_type == elfcpp::R_PPC_PLTREL24 | |
3280 | || r_type == elfcpp::R_PPC_LOCAL24PC) | |
3281 | return 1L << 25; | |
3282 | return 0; | |
3283 | } | |
3284 | ||
7e57d19e AM |
3285 | // Return whether this branch is going via a plt call stub. |
3286 | ||
3287 | template<int size, bool big_endian> | |
3288 | bool | |
3289 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( | |
3290 | Powerpc_relobj<size, big_endian>* ppc_object, | |
3291 | unsigned int shndx, | |
3292 | Address offset, | |
3293 | Target_powerpc* target, | |
3294 | Symbol_table* symtab) | |
3295 | { | |
3296 | if (this->object_ != ppc_object | |
3297 | || this->shndx_ != shndx | |
3298 | || this->offset_ != offset) | |
3299 | return false; | |
3300 | ||
3301 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
3302 | if (sym != NULL && sym->is_forwarder()) | |
3303 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3304 | if (target->replace_tls_get_addr(sym)) |
3305 | sym = target->tls_get_addr_opt(); | |
7e57d19e AM |
3306 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
3307 | if (gsym != NULL | |
7ee7ff70 AM |
3308 | ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
3309 | && !target->is_elfv2_localentry0(gsym)) | |
3310 | : (this->object_->local_has_plt_offset(this->r_sym_) | |
3311 | && !target->is_elfv2_localentry0(this->object_, this->r_sym_))) | |
7e57d19e AM |
3312 | { |
3313 | this->tocsave_ = 1; | |
3314 | return true; | |
3315 | } | |
3316 | return false; | |
3317 | } | |
3318 | ||
ec661b9d AM |
3319 | // If this branch needs a plt call stub, or a long branch stub, make one. |
3320 | ||
3321 | template<int size, bool big_endian> | |
a3e60ddb | 3322 | bool |
ec661b9d AM |
3323 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
3324 | Stub_table<size, big_endian>* stub_table, | |
3325 | Stub_table<size, big_endian>* ifunc_stub_table, | |
3326 | Symbol_table* symtab) const | |
3327 | { | |
3328 | Symbol* sym = this->object_->global_symbol(this->r_sym_); | |
88b8e639 AM |
3329 | Target_powerpc<size, big_endian>* target = |
3330 | static_cast<Target_powerpc<size, big_endian>*>( | |
3331 | parameters->sized_target<size, big_endian>()); | |
34e0882b AM |
3332 | if (sym != NULL && sym->is_forwarder()) |
3333 | sym = symtab->resolve_forwards(sym); | |
2778747c AM |
3334 | if (target->replace_tls_get_addr(sym)) |
3335 | sym = target->tls_get_addr_opt(); | |
34e0882b | 3336 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
dc60b26d AM |
3337 | bool ok = true; |
3338 | ||
ec661b9d | 3339 | if (gsym != NULL |
88b8e639 | 3340 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
ec661b9d AM |
3341 | : this->object_->local_has_plt_offset(this->r_sym_)) |
3342 | { | |
9055360d AM |
3343 | if (size == 64 |
3344 | && gsym != NULL | |
3345 | && target->abiversion() >= 2 | |
3346 | && !parameters->options().output_is_position_independent() | |
3347 | && !is_branch_reloc(this->r_type_)) | |
3348 | target->glink_section()->add_global_entry(gsym); | |
3349 | else | |
ec661b9d | 3350 | { |
64b5d6d7 AM |
3351 | if (stub_table == NULL |
3352 | && !(size == 32 | |
3353 | && gsym != NULL | |
3354 | && !parameters->options().output_is_position_independent() | |
3355 | && !is_branch_reloc(this->r_type_))) | |
9055360d AM |
3356 | stub_table = this->object_->stub_table(this->shndx_); |
3357 | if (stub_table == NULL) | |
3358 | { | |
64b5d6d7 AM |
3359 | // This is a ref from a data section to an ifunc symbol, |
3360 | // or a non-branch reloc for which we always want to use | |
3361 | // one set of stubs for resolving function addresses. | |
9055360d AM |
3362 | stub_table = ifunc_stub_table; |
3363 | } | |
3364 | gold_assert(stub_table != NULL); | |
a3e60ddb AM |
3365 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3366 | if (from != invalid_address) | |
3367 | from += (this->object_->output_section(this->shndx_)->address() | |
3368 | + this->offset_); | |
9055360d | 3369 | if (gsym != NULL) |
dc60b26d AM |
3370 | ok = stub_table->add_plt_call_entry(from, |
3371 | this->object_, gsym, | |
7e57d19e AM |
3372 | this->r_type_, this->addend_, |
3373 | this->tocsave_); | |
9055360d | 3374 | else |
dc60b26d AM |
3375 | ok = stub_table->add_plt_call_entry(from, |
3376 | this->object_, this->r_sym_, | |
7e57d19e AM |
3377 | this->r_type_, this->addend_, |
3378 | this->tocsave_); | |
ec661b9d | 3379 | } |
ec661b9d AM |
3380 | } |
3381 | else | |
3382 | { | |
cbcb23fa | 3383 | Address max_branch_offset = max_branch_delta(this->r_type_); |
a3e60ddb AM |
3384 | if (max_branch_offset == 0) |
3385 | return true; | |
ec661b9d AM |
3386 | Address from = this->object_->get_output_section_offset(this->shndx_); |
3387 | gold_assert(from != invalid_address); | |
3388 | from += (this->object_->output_section(this->shndx_)->address() | |
3389 | + this->offset_); | |
3390 | Address to; | |
3391 | if (gsym != NULL) | |
3392 | { | |
3393 | switch (gsym->source()) | |
3394 | { | |
3395 | case Symbol::FROM_OBJECT: | |
3396 | { | |
3397 | Object* symobj = gsym->object(); | |
3398 | if (symobj->is_dynamic() | |
3399 | || symobj->pluginobj() != NULL) | |
a3e60ddb | 3400 | return true; |
ec661b9d AM |
3401 | bool is_ordinary; |
3402 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
3403 | if (shndx == elfcpp::SHN_UNDEF) | |
a3e60ddb | 3404 | return true; |
ec661b9d AM |
3405 | } |
3406 | break; | |
3407 | ||
3408 | case Symbol::IS_UNDEFINED: | |
a3e60ddb | 3409 | return true; |
ec661b9d AM |
3410 | |
3411 | default: | |
3412 | break; | |
3413 | } | |
3414 | Symbol_table::Compute_final_value_status status; | |
3415 | to = symtab->compute_final_value<size>(gsym, &status); | |
3416 | if (status != Symbol_table::CFVS_OK) | |
a3e60ddb | 3417 | return true; |
9055360d AM |
3418 | if (size == 64) |
3419 | to += this->object_->ppc64_local_entry_offset(gsym); | |
ec661b9d AM |
3420 | } |
3421 | else | |
3422 | { | |
3423 | const Symbol_value<size>* psymval | |
3424 | = this->object_->local_symbol(this->r_sym_); | |
3425 | Symbol_value<size> symval; | |
0f125432 CC |
3426 | if (psymval->is_section_symbol()) |
3427 | symval.set_is_section_symbol(); | |
ec661b9d AM |
3428 | typedef Sized_relobj_file<size, big_endian> ObjType; |
3429 | typename ObjType::Compute_final_local_value_status status | |
3430 | = this->object_->compute_final_local_value(this->r_sym_, psymval, | |
3431 | &symval, symtab); | |
3432 | if (status != ObjType::CFLV_OK | |
3433 | || !symval.has_output_value()) | |
a3e60ddb | 3434 | return true; |
ec661b9d | 3435 | to = symval.value(this->object_, 0); |
9055360d AM |
3436 | if (size == 64) |
3437 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); | |
ec661b9d | 3438 | } |
cbcb23fa AM |
3439 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
3440 | to += this->addend_; | |
ec661b9d AM |
3441 | if (stub_table == NULL) |
3442 | stub_table = this->object_->stub_table(this->shndx_); | |
9055360d | 3443 | if (size == 64 && target->abiversion() < 2) |
ec661b9d AM |
3444 | { |
3445 | unsigned int dest_shndx; | |
1611bc4a AM |
3446 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
3447 | &to, &dest_shndx)) | |
3448 | return true; | |
ec661b9d AM |
3449 | } |
3450 | Address delta = to - from; | |
3451 | if (delta + max_branch_offset >= 2 * max_branch_offset) | |
3452 | { | |
0cfdc767 AM |
3453 | if (stub_table == NULL) |
3454 | { | |
3455 | gold_warning(_("%s:%s: branch in non-executable section," | |
3456 | " no long branch stub for you"), | |
3457 | this->object_->name().c_str(), | |
3458 | this->object_->section_name(this->shndx_).c_str()); | |
a3e60ddb | 3459 | return true; |
0cfdc767 | 3460 | } |
d49044c7 AM |
3461 | bool save_res = (size == 64 |
3462 | && gsym != NULL | |
3463 | && gsym->source() == Symbol::IN_OUTPUT_DATA | |
3464 | && gsym->output_data() == target->savres_section()); | |
dc60b26d AM |
3465 | ok = stub_table->add_long_branch_entry(this->object_, |
3466 | this->r_type_, | |
3467 | from, to, save_res); | |
ec661b9d AM |
3468 | } |
3469 | } | |
dc60b26d AM |
3470 | if (!ok) |
3471 | gold_debug(DEBUG_TARGET, | |
3472 | "branch at %s:%s+%#lx\n" | |
3473 | "can't reach stub attached to %s:%s", | |
3474 | this->object_->name().c_str(), | |
3475 | this->object_->section_name(this->shndx_).c_str(), | |
3476 | (unsigned long) this->offset_, | |
3477 | stub_table->relobj()->name().c_str(), | |
3478 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); | |
3479 | ||
3480 | return ok; | |
ec661b9d AM |
3481 | } |
3482 | ||
3483 | // Relaxation hook. This is where we do stub generation. | |
3484 | ||
3485 | template<int size, bool big_endian> | |
3486 | bool | |
3487 | Target_powerpc<size, big_endian>::do_relax(int pass, | |
3488 | const Input_objects*, | |
3489 | Symbol_table* symtab, | |
3490 | Layout* layout, | |
3491 | const Task* task) | |
3492 | { | |
3493 | unsigned int prev_brlt_size = 0; | |
3494 | if (pass == 1) | |
ec661b9d | 3495 | { |
b4f7960d AM |
3496 | bool thread_safe |
3497 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); | |
3498 | if (size == 64 | |
3499 | && this->abiversion() < 2 | |
3500 | && !thread_safe | |
3501 | && !parameters->options().user_set_plt_thread_safe()) | |
ec661b9d | 3502 | { |
e2458743 | 3503 | static const char* const thread_starter[] = |
9e69ed50 AM |
3504 | { |
3505 | "pthread_create", | |
3506 | /* libstdc++ */ | |
3507 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", | |
3508 | /* librt */ | |
3509 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", | |
3510 | "mq_notify", "create_timer", | |
3511 | /* libanl */ | |
3512 | "getaddrinfo_a", | |
3513 | /* libgomp */ | |
80272b8c | 3514 | "GOMP_parallel", |
9e69ed50 | 3515 | "GOMP_parallel_start", |
80272b8c | 3516 | "GOMP_parallel_loop_static", |
9e69ed50 | 3517 | "GOMP_parallel_loop_static_start", |
80272b8c | 3518 | "GOMP_parallel_loop_dynamic", |
9e69ed50 | 3519 | "GOMP_parallel_loop_dynamic_start", |
80272b8c | 3520 | "GOMP_parallel_loop_guided", |
9e69ed50 | 3521 | "GOMP_parallel_loop_guided_start", |
80272b8c | 3522 | "GOMP_parallel_loop_runtime", |
9e69ed50 | 3523 | "GOMP_parallel_loop_runtime_start", |
80272b8c | 3524 | "GOMP_parallel_sections", |
43819297 | 3525 | "GOMP_parallel_sections_start", |
f9dffbf0 AM |
3526 | /* libgo */ |
3527 | "__go_go", | |
9e69ed50 AM |
3528 | }; |
3529 | ||
e2458743 AM |
3530 | if (parameters->options().shared()) |
3531 | thread_safe = true; | |
3532 | else | |
9e69ed50 | 3533 | { |
e2458743 AM |
3534 | for (unsigned int i = 0; |
3535 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); | |
3536 | i++) | |
3537 | { | |
3538 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); | |
3539 | thread_safe = (sym != NULL | |
3540 | && sym->in_reg() | |
3541 | && sym->in_real_elf()); | |
3542 | if (thread_safe) | |
3543 | break; | |
3544 | } | |
9e69ed50 | 3545 | } |
ec661b9d | 3546 | } |
9e69ed50 | 3547 | this->plt_thread_safe_ = thread_safe; |
a3e60ddb AM |
3548 | } |
3549 | ||
3550 | if (pass == 1) | |
3551 | { | |
3552 | this->stub_group_size_ = parameters->options().stub_group_size(); | |
3553 | bool no_size_errors = true; | |
3554 | if (this->stub_group_size_ == 1) | |
3555 | this->stub_group_size_ = 0x1c00000; | |
3556 | else if (this->stub_group_size_ == -1) | |
3557 | this->stub_group_size_ = -0x1e00000; | |
3558 | else | |
3559 | no_size_errors = false; | |
3560 | this->group_sections(layout, task, no_size_errors); | |
3561 | } | |
3562 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) | |
3563 | { | |
3564 | this->branch_lookup_table_.clear(); | |
3565 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3566 | p != this->stub_tables_.end(); | |
3567 | ++p) | |
3568 | { | |
3569 | (*p)->clear_stubs(true); | |
3570 | } | |
3571 | this->stub_tables_.clear(); | |
3572 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; | |
57f6d32d | 3573 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
a3e60ddb AM |
3574 | program_name, this->stub_group_size_); |
3575 | this->group_sections(layout, task, true); | |
ec661b9d AM |
3576 | } |
3577 | ||
3578 | // We need address of stub tables valid for make_stub. | |
3579 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3580 | p != this->stub_tables_.end(); | |
3581 | ++p) | |
3582 | { | |
3583 | const Powerpc_relobj<size, big_endian>* object | |
3584 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); | |
3585 | Address off = object->get_output_section_offset((*p)->shndx()); | |
3586 | gold_assert(off != invalid_address); | |
3587 | Output_section* os = (*p)->output_section(); | |
3588 | (*p)->set_address_and_size(os, off); | |
3589 | } | |
3590 | ||
9e69ed50 AM |
3591 | if (pass != 1) |
3592 | { | |
3593 | // Clear plt call stubs, long branch stubs and branch lookup table. | |
3594 | prev_brlt_size = this->branch_lookup_table_.size(); | |
3595 | this->branch_lookup_table_.clear(); | |
3596 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3597 | p != this->stub_tables_.end(); | |
3598 | ++p) | |
3599 | { | |
a3e60ddb | 3600 | (*p)->clear_stubs(false); |
9e69ed50 AM |
3601 | } |
3602 | } | |
3603 | ||
3604 | // Build all the stubs. | |
a3e60ddb | 3605 | this->relax_failed_ = false; |
ec661b9d AM |
3606 | Stub_table<size, big_endian>* ifunc_stub_table |
3607 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; | |
3608 | Stub_table<size, big_endian>* one_stub_table | |
3609 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; | |
3610 | for (typename Branches::const_iterator b = this->branch_info_.begin(); | |
3611 | b != this->branch_info_.end(); | |
3612 | b++) | |
3613 | { | |
a3e60ddb AM |
3614 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
3615 | && !this->relax_failed_) | |
3616 | { | |
3617 | this->relax_failed_ = true; | |
3618 | this->relax_fail_count_++; | |
3619 | if (this->relax_fail_count_ < 3) | |
3620 | return true; | |
3621 | } | |
ec661b9d AM |
3622 | } |
3623 | ||
9e69ed50 | 3624 | // Did anything change size? |
ec661b9d AM |
3625 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
3626 | bool again = num_huge_branches != prev_brlt_size; | |
3627 | if (size == 64 && num_huge_branches != 0) | |
3628 | this->make_brlt_section(layout); | |
3629 | if (size == 64 && again) | |
3630 | this->brlt_section_->set_current_size(num_huge_branches); | |
3631 | ||
be897fb7 AM |
3632 | for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin(); |
3633 | p != this->stub_tables_.rend(); | |
3634 | ++p) | |
3635 | (*p)->remove_eh_frame(layout); | |
3636 | ||
3637 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3638 | p != this->stub_tables_.end(); | |
3639 | ++p) | |
3640 | (*p)->add_eh_frame(layout); | |
3641 | ||
ec661b9d AM |
3642 | typedef Unordered_set<Output_section*> Output_sections; |
3643 | Output_sections os_need_update; | |
3644 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3645 | p != this->stub_tables_.end(); | |
3646 | ++p) | |
3647 | { | |
3648 | if ((*p)->size_update()) | |
3649 | { | |
3650 | again = true; | |
3651 | os_need_update.insert((*p)->output_section()); | |
3652 | } | |
3653 | } | |
3654 | ||
9e69ed50 AM |
3655 | // Set output section offsets for all input sections in an output |
3656 | // section that just changed size. Anything past the stubs will | |
3657 | // need updating. | |
ec661b9d AM |
3658 | for (typename Output_sections::iterator p = os_need_update.begin(); |
3659 | p != os_need_update.end(); | |
3660 | p++) | |
3661 | { | |
3662 | Output_section* os = *p; | |
3663 | Address off = 0; | |
3664 | typedef Output_section::Input_section_list Input_section_list; | |
3665 | for (Input_section_list::const_iterator i = os->input_sections().begin(); | |
3666 | i != os->input_sections().end(); | |
3667 | ++i) | |
3668 | { | |
3669 | off = align_address(off, i->addralign()); | |
3670 | if (i->is_input_section() || i->is_relaxed_input_section()) | |
3671 | i->relobj()->set_section_offset(i->shndx(), off); | |
3672 | if (i->is_relaxed_input_section()) | |
3673 | { | |
3674 | Stub_table<size, big_endian>* stub_table | |
3675 | = static_cast<Stub_table<size, big_endian>*>( | |
3676 | i->relaxed_input_section()); | |
6395d38b HS |
3677 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
3678 | off += stub_table_size; | |
3679 | // After a few iterations, set current stub table size | |
3680 | // as min size threshold, so later stub tables can only | |
3681 | // grow in size. | |
3682 | if (pass >= 4) | |
3683 | stub_table->set_min_size_threshold(stub_table_size); | |
ec661b9d AM |
3684 | } |
3685 | else | |
3686 | off += i->data_size(); | |
3687 | } | |
6830ee24 AM |
3688 | // If .branch_lt is part of this output section, then we have |
3689 | // just done the offset adjustment. | |
ec661b9d AM |
3690 | os->clear_section_offsets_need_adjustment(); |
3691 | } | |
3692 | ||
3693 | if (size == 64 | |
3694 | && !again | |
3695 | && num_huge_branches != 0 | |
3696 | && parameters->options().output_is_position_independent()) | |
3697 | { | |
3698 | // Fill in the BRLT relocs. | |
06f30c9d | 3699 | this->brlt_section_->reset_brlt_sizes(); |
ec661b9d AM |
3700 | for (typename Branch_lookup_table::const_iterator p |
3701 | = this->branch_lookup_table_.begin(); | |
3702 | p != this->branch_lookup_table_.end(); | |
3703 | ++p) | |
3704 | { | |
3705 | this->brlt_section_->add_reloc(p->first, p->second); | |
3706 | } | |
06f30c9d | 3707 | this->brlt_section_->finalize_brlt_sizes(); |
ec661b9d | 3708 | } |
590b87ff AM |
3709 | |
3710 | if (!again | |
3711 | && (parameters->options().user_set_emit_stub_syms() | |
3712 | ? parameters->options().emit_stub_syms() | |
3713 | : (size == 64 | |
3714 | || parameters->options().output_is_position_independent() | |
3715 | || parameters->options().emit_relocs()))) | |
3716 | { | |
3717 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); | |
3718 | p != this->stub_tables_.end(); | |
3719 | ++p) | |
3720 | (*p)->define_stub_syms(symtab); | |
3721 | ||
3722 | if (this->glink_ != NULL) | |
3723 | { | |
9e390558 | 3724 | int stub_size = this->glink_->pltresolve_size(); |
590b87ff AM |
3725 | Address value = -stub_size; |
3726 | if (size == 64) | |
3727 | { | |
3728 | value = 8; | |
3729 | stub_size -= 8; | |
3730 | } | |
3731 | this->define_local(symtab, "__glink_PLTresolve", | |
3732 | this->glink_, value, stub_size); | |
3733 | ||
3734 | if (size != 64) | |
3735 | this->define_local(symtab, "__glink", this->glink_, 0, 0); | |
3736 | } | |
3737 | } | |
3738 | ||
ec661b9d AM |
3739 | return again; |
3740 | } | |
3741 | ||
9d5781f8 AM |
3742 | template<int size, bool big_endian> |
3743 | void | |
3744 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, | |
3745 | unsigned char* oview, | |
3746 | uint64_t* paddress, | |
3747 | off_t* plen) const | |
3748 | { | |
3749 | uint64_t address = plt->address(); | |
3750 | off_t len = plt->data_size(); | |
3751 | ||
3752 | if (plt == this->glink_) | |
3753 | { | |
3754 | // See Output_data_glink::do_write() for glink contents. | |
5fe7ffdc AM |
3755 | if (len == 0) |
3756 | { | |
3757 | gold_assert(parameters->doing_static_link()); | |
3758 | // Static linking may need stubs, to support ifunc and long | |
3759 | // branches. We need to create an output section for | |
3760 | // .eh_frame early in the link process, to have a place to | |
3761 | // attach stub .eh_frame info. We also need to have | |
3762 | // registered a CIE that matches the stub CIE. Both of | |
3763 | // these requirements are satisfied by creating an FDE and | |
3764 | // CIE for .glink, even though static linking will leave | |
3765 | // .glink zero length. | |
3766 | // ??? Hopefully generating an FDE with a zero address range | |
3767 | // won't confuse anything that consumes .eh_frame info. | |
3768 | } | |
3769 | else if (size == 64) | |
9d5781f8 AM |
3770 | { |
3771 | // There is one word before __glink_PLTresolve | |
3772 | address += 8; | |
3773 | len -= 8; | |
3774 | } | |
3775 | else if (parameters->options().output_is_position_independent()) | |
3776 | { | |
3777 | // There are two FDEs for a position independent glink. | |
3778 | // The first covers the branch table, the second | |
3779 | // __glink_PLTresolve at the end of glink. | |
9e390558 | 3780 | off_t resolve_size = this->glink_->pltresolve_size(); |
5fe7ffdc | 3781 | if (oview[9] == elfcpp::DW_CFA_nop) |
9d5781f8 AM |
3782 | len -= resolve_size; |
3783 | else | |
3784 | { | |
3785 | address += len - resolve_size; | |
3786 | len = resolve_size; | |
3787 | } | |
3788 | } | |
3789 | } | |
3790 | else | |
3791 | { | |
3792 | // Must be a stub table. | |
3793 | const Stub_table<size, big_endian>* stub_table | |
3794 | = static_cast<const Stub_table<size, big_endian>*>(plt); | |
3795 | uint64_t stub_address = stub_table->stub_address(); | |
3796 | len -= stub_address - address; | |
3797 | address = stub_address; | |
3798 | } | |
3799 | ||
3800 | *paddress = address; | |
3801 | *plen = len; | |
3802 | } | |
3803 | ||
42cacb20 DE |
3804 | // A class to handle the PLT data. |
3805 | ||
3806 | template<int size, bool big_endian> | |
cf43a2fe | 3807 | class Output_data_plt_powerpc : public Output_section_data_build |
42cacb20 DE |
3808 | { |
3809 | public: | |
3810 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
3811 | size, big_endian> Reloc_section; | |
3812 | ||
e5d5f5ed AM |
3813 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
3814 | Reloc_section* plt_rel, | |
e5d5f5ed AM |
3815 | const char* name) |
3816 | : Output_section_data_build(size == 32 ? 4 : 8), | |
3817 | rel_(plt_rel), | |
3818 | targ_(targ), | |
e5d5f5ed AM |
3819 | name_(name) |
3820 | { } | |
42cacb20 DE |
3821 | |
3822 | // Add an entry to the PLT. | |
03e25981 | 3823 | void |
cf43a2fe | 3824 | add_entry(Symbol*); |
42cacb20 | 3825 | |
03e25981 | 3826 | void |
e5d5f5ed AM |
3827 | add_ifunc_entry(Symbol*); |
3828 | ||
2d7ad24e AM |
3829 | void |
3830 | add_local_entry(Sized_relobj_file<size, big_endian>*, unsigned int); | |
3831 | ||
03e25981 | 3832 | void |
e5d5f5ed AM |
3833 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
3834 | ||
42cacb20 | 3835 | // Return the .rela.plt section data. |
e5d5f5ed | 3836 | Reloc_section* |
cf43a2fe AM |
3837 | rel_plt() const |
3838 | { | |
42cacb20 DE |
3839 | return this->rel_; |
3840 | } | |
3841 | ||
0e70b911 CC |
3842 | // Return the number of PLT entries. |
3843 | unsigned int | |
3844 | entry_count() const | |
d83ce4e3 | 3845 | { |
b3ccdeb5 AM |
3846 | if (this->current_data_size() == 0) |
3847 | return 0; | |
b4f7960d AM |
3848 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
3849 | / this->plt_entry_size()); | |
d83ce4e3 | 3850 | } |
0e70b911 | 3851 | |
42cacb20 | 3852 | protected: |
42cacb20 | 3853 | void |
cf43a2fe | 3854 | do_adjust_output_section(Output_section* os) |
42cacb20 | 3855 | { |
cf43a2fe | 3856 | os->set_entsize(0); |
42cacb20 DE |
3857 | } |
3858 | ||
6ce78956 AM |
3859 | // Write to a map file. |
3860 | void | |
3861 | do_print_to_mapfile(Mapfile* mapfile) const | |
e5d5f5ed | 3862 | { mapfile->print_output_data(this, this->name_); } |
6ce78956 | 3863 | |
cf43a2fe | 3864 | private: |
b4f7960d AM |
3865 | // Return the offset of the first non-reserved PLT entry. |
3866 | unsigned int | |
3867 | first_plt_entry_offset() const | |
3868 | { | |
2d7ad24e AM |
3869 | // IPLT and LPLT have no reserved entry. |
3870 | if (this->name_[3] == 'I' || this->name_[3] == 'L') | |
b4f7960d AM |
3871 | return 0; |
3872 | return this->targ_->first_plt_entry_offset(); | |
3873 | } | |
3874 | ||
3875 | // Return the size of each PLT entry. | |
3876 | unsigned int | |
3877 | plt_entry_size() const | |
3878 | { | |
3879 | return this->targ_->plt_entry_size(); | |
3880 | } | |
cf43a2fe | 3881 | |
42cacb20 DE |
3882 | // Write out the PLT data. |
3883 | void | |
3884 | do_write(Output_file*); | |
3885 | ||
3886 | // The reloc section. | |
3887 | Reloc_section* rel_; | |
cf43a2fe AM |
3888 | // Allows access to .glink for do_write. |
3889 | Target_powerpc<size, big_endian>* targ_; | |
e5d5f5ed AM |
3890 | // What to report in map file. |
3891 | const char *name_; | |
42cacb20 DE |
3892 | }; |
3893 | ||
e5d5f5ed | 3894 | // Add an entry to the PLT. |
42cacb20 DE |
3895 | |
3896 | template<int size, bool big_endian> | |
03e25981 | 3897 | void |
e5d5f5ed | 3898 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
42cacb20 | 3899 | { |
e5d5f5ed AM |
3900 | if (!gsym->has_plt_offset()) |
3901 | { | |
ec661b9d | 3902 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3903 | if (off == 0) |
3904 | off += this->first_plt_entry_offset(); | |
3905 | gsym->set_plt_offset(off); | |
3906 | gsym->set_needs_dynsym_entry(); | |
3907 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3908 | this->rel_->add_global(gsym, dynrel, this, off, 0); | |
b4f7960d | 3909 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3910 | this->set_current_data_size(off); |
3911 | } | |
42cacb20 DE |
3912 | } |
3913 | ||
e5d5f5ed | 3914 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
42cacb20 DE |
3915 | |
3916 | template<int size, bool big_endian> | |
03e25981 | 3917 | void |
e5d5f5ed | 3918 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
42cacb20 | 3919 | { |
cf43a2fe AM |
3920 | if (!gsym->has_plt_offset()) |
3921 | { | |
ec661b9d | 3922 | section_size_type off = this->current_data_size(); |
cf43a2fe | 3923 | gsym->set_plt_offset(off); |
e5d5f5ed | 3924 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
b4f7960d | 3925 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3926 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3927 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); | |
b4f7960d | 3928 | off += this->plt_entry_size(); |
e5d5f5ed AM |
3929 | this->set_current_data_size(off); |
3930 | } | |
3931 | } | |
3932 | ||
2d7ad24e AM |
3933 | // Add an entry for a local symbol to the PLT. |
3934 | ||
3935 | template<int size, bool big_endian> | |
3936 | void | |
3937 | Output_data_plt_powerpc<size, big_endian>::add_local_entry( | |
3938 | Sized_relobj_file<size, big_endian>* relobj, | |
3939 | unsigned int local_sym_index) | |
3940 | { | |
3941 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3942 | { | |
3943 | section_size_type off = this->current_data_size(); | |
3944 | relobj->set_local_plt_offset(local_sym_index, off); | |
3945 | if (this->rel_) | |
3946 | { | |
3947 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; | |
3948 | if (size == 64 && this->targ_->abiversion() < 2) | |
3949 | dynrel = elfcpp::R_POWERPC_JMP_SLOT; | |
3950 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, | |
3951 | dynrel, this, off, 0); | |
3952 | } | |
3953 | off += this->plt_entry_size(); | |
3954 | this->set_current_data_size(off); | |
3955 | } | |
3956 | } | |
3957 | ||
e5d5f5ed AM |
3958 | // Add an entry for a local ifunc symbol to the IPLT. |
3959 | ||
3960 | template<int size, bool big_endian> | |
03e25981 | 3961 | void |
e5d5f5ed AM |
3962 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
3963 | Sized_relobj_file<size, big_endian>* relobj, | |
3964 | unsigned int local_sym_index) | |
3965 | { | |
3966 | if (!relobj->local_has_plt_offset(local_sym_index)) | |
3967 | { | |
ec661b9d | 3968 | section_size_type off = this->current_data_size(); |
e5d5f5ed AM |
3969 | relobj->set_local_plt_offset(local_sym_index, off); |
3970 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; | |
b4f7960d | 3971 | if (size == 64 && this->targ_->abiversion() < 2) |
e5d5f5ed AM |
3972 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
3973 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, | |
3974 | this, off, 0); | |
b4f7960d | 3975 | off += this->plt_entry_size(); |
cf43a2fe AM |
3976 | this->set_current_data_size(off); |
3977 | } | |
42cacb20 DE |
3978 | } |
3979 | ||
dd93cd0a | 3980 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
9e69ed50 | 3981 | static const uint32_t add_2_2_11 = 0x7c425a14; |
549dba71 | 3982 | static const uint32_t add_2_2_12 = 0x7c426214; |
dd93cd0a AM |
3983 | static const uint32_t add_3_3_2 = 0x7c631214; |
3984 | static const uint32_t add_3_3_13 = 0x7c636a14; | |
34e0882b AM |
3985 | static const uint32_t add_3_12_2 = 0x7c6c1214; |
3986 | static const uint32_t add_3_12_13 = 0x7c6c6a14; | |
dd93cd0a | 3987 | static const uint32_t add_11_0_11 = 0x7d605a14; |
b4f7960d AM |
3988 | static const uint32_t add_11_2_11 = 0x7d625a14; |
3989 | static const uint32_t add_11_11_2 = 0x7d6b1214; | |
3990 | static const uint32_t addi_0_12 = 0x380c0000; | |
dd93cd0a | 3991 | static const uint32_t addi_2_2 = 0x38420000; |
dd93cd0a | 3992 | static const uint32_t addi_3_3 = 0x38630000; |
b4f7960d | 3993 | static const uint32_t addi_11_11 = 0x396b0000; |
bbec1a5d | 3994 | static const uint32_t addi_12_1 = 0x39810000; |
b4f7960d | 3995 | static const uint32_t addi_12_12 = 0x398c0000; |
dd93cd0a AM |
3996 | static const uint32_t addis_0_2 = 0x3c020000; |
3997 | static const uint32_t addis_0_13 = 0x3c0d0000; | |
bbec1a5d | 3998 | static const uint32_t addis_2_12 = 0x3c4c0000; |
b4f7960d | 3999 | static const uint32_t addis_11_2 = 0x3d620000; |
c9269dff AM |
4000 | static const uint32_t addis_11_11 = 0x3d6b0000; |
4001 | static const uint32_t addis_11_30 = 0x3d7e0000; | |
bbec1a5d | 4002 | static const uint32_t addis_12_1 = 0x3d810000; |
397998fc | 4003 | static const uint32_t addis_12_2 = 0x3d820000; |
c9269dff | 4004 | static const uint32_t addis_12_12 = 0x3d8c0000; |
c9269dff AM |
4005 | static const uint32_t b = 0x48000000; |
4006 | static const uint32_t bcl_20_31 = 0x429f0005; | |
4007 | static const uint32_t bctr = 0x4e800420; | |
34e0882b AM |
4008 | static const uint32_t bctrl = 0x4e800421; |
4009 | static const uint32_t beqlr = 0x4d820020; | |
f3a0ed29 | 4010 | static const uint32_t blr = 0x4e800020; |
9e69ed50 | 4011 | static const uint32_t bnectr_p4 = 0x4ce20420; |
bbec1a5d | 4012 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
9e69ed50 | 4013 | static const uint32_t cmpldi_2_0 = 0x28220000; |
34e0882b AM |
4014 | static const uint32_t cmpdi_11_0 = 0x2c2b0000; |
4015 | static const uint32_t cmpwi_11_0 = 0x2c0b0000; | |
dd93cd0a AM |
4016 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
4017 | static const uint32_t cror_31_31_31 = 0x4ffffb82; | |
f3a0ed29 AM |
4018 | static const uint32_t ld_0_1 = 0xe8010000; |
4019 | static const uint32_t ld_0_12 = 0xe80c0000; | |
dd93cd0a | 4020 | static const uint32_t ld_2_1 = 0xe8410000; |
dd93cd0a | 4021 | static const uint32_t ld_2_2 = 0xe8420000; |
b4f7960d | 4022 | static const uint32_t ld_2_11 = 0xe84b0000; |
549dba71 | 4023 | static const uint32_t ld_2_12 = 0xe84c0000; |
34e0882b | 4024 | static const uint32_t ld_11_1 = 0xe9610000; |
b4f7960d | 4025 | static const uint32_t ld_11_2 = 0xe9620000; |
34e0882b | 4026 | static const uint32_t ld_11_3 = 0xe9630000; |
b4f7960d AM |
4027 | static const uint32_t ld_11_11 = 0xe96b0000; |
4028 | static const uint32_t ld_12_2 = 0xe9820000; | |
34e0882b | 4029 | static const uint32_t ld_12_3 = 0xe9830000; |
b4f7960d | 4030 | static const uint32_t ld_12_11 = 0xe98b0000; |
9055360d | 4031 | static const uint32_t ld_12_12 = 0xe98c0000; |
f3a0ed29 | 4032 | static const uint32_t lfd_0_1 = 0xc8010000; |
dd93cd0a | 4033 | static const uint32_t li_0_0 = 0x38000000; |
f3a0ed29 | 4034 | static const uint32_t li_12_0 = 0x39800000; |
bbec1a5d | 4035 | static const uint32_t lis_0 = 0x3c000000; |
549dba71 | 4036 | static const uint32_t lis_2 = 0x3c400000; |
c9269dff AM |
4037 | static const uint32_t lis_11 = 0x3d600000; |
4038 | static const uint32_t lis_12 = 0x3d800000; | |
b4f7960d | 4039 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
c9269dff | 4040 | static const uint32_t lwz_0_12 = 0x800c0000; |
34e0882b | 4041 | static const uint32_t lwz_11_3 = 0x81630000; |
c9269dff AM |
4042 | static const uint32_t lwz_11_11 = 0x816b0000; |
4043 | static const uint32_t lwz_11_30 = 0x817e0000; | |
34e0882b | 4044 | static const uint32_t lwz_12_3 = 0x81830000; |
c9269dff | 4045 | static const uint32_t lwz_12_12 = 0x818c0000; |
dd93cd0a | 4046 | static const uint32_t lwzu_0_12 = 0x840c0000; |
c9269dff | 4047 | static const uint32_t mflr_0 = 0x7c0802a6; |
dd93cd0a | 4048 | static const uint32_t mflr_11 = 0x7d6802a6; |
c9269dff | 4049 | static const uint32_t mflr_12 = 0x7d8802a6; |
34e0882b AM |
4050 | static const uint32_t mr_0_3 = 0x7c601b78; |
4051 | static const uint32_t mr_3_0 = 0x7c030378; | |
c9269dff AM |
4052 | static const uint32_t mtctr_0 = 0x7c0903a6; |
4053 | static const uint32_t mtctr_11 = 0x7d6903a6; | |
ec661b9d | 4054 | static const uint32_t mtctr_12 = 0x7d8903a6; |
c9269dff | 4055 | static const uint32_t mtlr_0 = 0x7c0803a6; |
34e0882b | 4056 | static const uint32_t mtlr_11 = 0x7d6803a6; |
c9269dff | 4057 | static const uint32_t mtlr_12 = 0x7d8803a6; |
dd93cd0a | 4058 | static const uint32_t nop = 0x60000000; |
c9269dff | 4059 | static const uint32_t ori_0_0_0 = 0x60000000; |
b4f7960d | 4060 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
f3a0ed29 AM |
4061 | static const uint32_t std_0_1 = 0xf8010000; |
4062 | static const uint32_t std_0_12 = 0xf80c0000; | |
dd93cd0a | 4063 | static const uint32_t std_2_1 = 0xf8410000; |
34e0882b | 4064 | static const uint32_t std_11_1 = 0xf9610000; |
f3a0ed29 AM |
4065 | static const uint32_t stfd_0_1 = 0xd8010000; |
4066 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; | |
dd93cd0a | 4067 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
b4f7960d AM |
4068 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
4069 | static const uint32_t xor_2_12_12 = 0x7d826278; | |
4070 | static const uint32_t xor_11_12_12 = 0x7d8b6278; | |
42cacb20 DE |
4071 | |
4072 | // Write out the PLT. | |
4073 | ||
4074 | template<int size, bool big_endian> | |
4075 | void | |
4076 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) | |
4077 | { | |
2d7ad24e | 4078 | if (size == 32 && (this->name_[3] != 'I' && this->name_[3] != 'L')) |
cf43a2fe | 4079 | { |
ec661b9d | 4080 | const section_size_type offset = this->offset(); |
cf43a2fe AM |
4081 | const section_size_type oview_size |
4082 | = convert_to_section_size_type(this->data_size()); | |
4083 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
4084 | unsigned char* pov = oview; | |
4085 | unsigned char* endpov = oview + oview_size; | |
4086 | ||
e5d5f5ed | 4087 | // The address of the .glink branch table |
cf43a2fe AM |
4088 | const Output_data_glink<size, big_endian>* glink |
4089 | = this->targ_->glink_section(); | |
ec661b9d | 4090 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
cf43a2fe AM |
4091 | |
4092 | while (pov < endpov) | |
4093 | { | |
4094 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); | |
4095 | pov += 4; | |
4096 | branch_tab += 4; | |
4097 | } | |
4098 | ||
4099 | of->write_output_view(offset, oview_size, oview); | |
4100 | } | |
4101 | } | |
4102 | ||
4103 | // Create the PLT section. | |
4104 | ||
4105 | template<int size, bool big_endian> | |
4106 | void | |
40b469d7 AM |
4107 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
4108 | Layout* layout) | |
cf43a2fe AM |
4109 | { |
4110 | if (this->plt_ == NULL) | |
4111 | { | |
40b469d7 AM |
4112 | if (this->got_ == NULL) |
4113 | this->got_section(symtab, layout); | |
4114 | ||
cf43a2fe AM |
4115 | if (this->glink_ == NULL) |
4116 | make_glink_section(layout); | |
4117 | ||
4118 | // Ensure that .rela.dyn always appears before .rela.plt This is | |
4119 | // necessary due to how, on PowerPC and some other targets, .rela.dyn | |
b3ccdeb5 | 4120 | // needs to include .rela.plt in its range. |
cf43a2fe AM |
4121 | this->rela_dyn_section(layout); |
4122 | ||
e5d5f5ed AM |
4123 | Reloc_section* plt_rel = new Reloc_section(false); |
4124 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
4125 | elfcpp::SHF_ALLOC, plt_rel, | |
4126 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
4127 | this->plt_ | |
4128 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, | |
e5d5f5ed | 4129 | "** PLT"); |
cf43a2fe AM |
4130 | layout->add_output_section_data(".plt", |
4131 | (size == 32 | |
4132 | ? elfcpp::SHT_PROGBITS | |
4133 | : elfcpp::SHT_NOBITS), | |
4134 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
4135 | this->plt_, | |
4136 | (size == 32 | |
4137 | ? ORDER_SMALL_DATA | |
4138 | : ORDER_SMALL_BSS), | |
4139 | false); | |
3254d32c AM |
4140 | |
4141 | Output_section* rela_plt_os = plt_rel->output_section(); | |
4142 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
cf43a2fe AM |
4143 | } |
4144 | } | |
4145 | ||
e5d5f5ed AM |
4146 | // Create the IPLT section. |
4147 | ||
4148 | template<int size, bool big_endian> | |
4149 | void | |
40b469d7 AM |
4150 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
4151 | Layout* layout) | |
e5d5f5ed AM |
4152 | { |
4153 | if (this->iplt_ == NULL) | |
4154 | { | |
40b469d7 | 4155 | this->make_plt_section(symtab, layout); |
2d7ad24e | 4156 | this->make_lplt_section(layout); |
e5d5f5ed AM |
4157 | |
4158 | Reloc_section* iplt_rel = new Reloc_section(false); | |
6528b6eb AM |
4159 | if (this->rela_dyn_->output_section()) |
4160 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); | |
e5d5f5ed AM |
4161 | this->iplt_ |
4162 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, | |
b4f7960d | 4163 | "** IPLT"); |
6528b6eb AM |
4164 | if (this->plt_->output_section()) |
4165 | this->plt_->output_section()->add_output_section_data(this->iplt_); | |
e5d5f5ed AM |
4166 | } |
4167 | } | |
4168 | ||
2d7ad24e AM |
4169 | // Create the LPLT section. |
4170 | ||
4171 | template<int size, bool big_endian> | |
4172 | void | |
4173 | Target_powerpc<size, big_endian>::make_lplt_section(Layout* layout) | |
4174 | { | |
4175 | if (this->lplt_ == NULL) | |
4176 | { | |
4177 | Reloc_section* lplt_rel = NULL; | |
4178 | if (parameters->options().output_is_position_independent()) | |
4179 | { | |
4180 | lplt_rel = new Reloc_section(false); | |
4181 | this->rela_dyn_section(layout); | |
4182 | if (this->rela_dyn_->output_section()) | |
4183 | this->rela_dyn_->output_section() | |
4184 | ->add_output_section_data(lplt_rel); | |
4185 | } | |
4186 | this->lplt_ | |
4187 | = new Output_data_plt_powerpc<size, big_endian>(this, lplt_rel, | |
4188 | "** LPLT"); | |
4189 | this->make_brlt_section(layout); | |
4190 | if (this->brlt_section_ && this->brlt_section_->output_section()) | |
4191 | this->brlt_section_->output_section() | |
4192 | ->add_output_section_data(this->lplt_); | |
4193 | else | |
4194 | layout->add_output_section_data(".branch_lt", | |
4195 | elfcpp::SHT_PROGBITS, | |
4196 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, | |
4197 | this->lplt_, | |
4198 | ORDER_RELRO, | |
4199 | true); | |
4200 | } | |
4201 | } | |
4202 | ||
ec661b9d | 4203 | // A section for huge long branch addresses, similar to plt section. |
cf43a2fe AM |
4204 | |
4205 | template<int size, bool big_endian> | |
ec661b9d | 4206 | class Output_data_brlt_powerpc : public Output_section_data_build |
cf43a2fe AM |
4207 | { |
4208 | public: | |
ec661b9d AM |
4209 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4210 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, | |
4211 | size, big_endian> Reloc_section; | |
c9269dff | 4212 | |
ec661b9d AM |
4213 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
4214 | Reloc_section* brlt_rel) | |
4215 | : Output_section_data_build(size == 32 ? 4 : 8), | |
4216 | rel_(brlt_rel), | |
4217 | targ_(targ) | |
4218 | { } | |
cf43a2fe | 4219 | |
06f30c9d CC |
4220 | void |
4221 | reset_brlt_sizes() | |
4222 | { | |
4223 | this->reset_data_size(); | |
4224 | this->rel_->reset_data_size(); | |
4225 | } | |
4226 | ||
4227 | void | |
4228 | finalize_brlt_sizes() | |
4229 | { | |
4230 | this->finalize_data_size(); | |
4231 | this->rel_->finalize_data_size(); | |
4232 | } | |
4233 | ||
ec661b9d | 4234 | // Add a reloc for an entry in the BRLT. |
cf43a2fe | 4235 | void |
ec661b9d AM |
4236 | add_reloc(Address to, unsigned int off) |
4237 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } | |
e5d5f5ed | 4238 | |
ec661b9d | 4239 | // Update section and reloc section size. |
e5d5f5ed | 4240 | void |
ec661b9d AM |
4241 | set_current_size(unsigned int num_branches) |
4242 | { | |
4243 | this->reset_address_and_file_offset(); | |
4244 | this->set_current_data_size(num_branches * 16); | |
4245 | this->finalize_data_size(); | |
4246 | Output_section* os = this->output_section(); | |
4247 | os->set_section_offsets_need_adjustment(); | |
4248 | if (this->rel_ != NULL) | |
4249 | { | |
0e123f69 | 4250 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
ec661b9d AM |
4251 | this->rel_->reset_address_and_file_offset(); |
4252 | this->rel_->set_current_data_size(num_branches * reloc_size); | |
4253 | this->rel_->finalize_data_size(); | |
4254 | Output_section* os = this->rel_->output_section(); | |
4255 | os->set_section_offsets_need_adjustment(); | |
4256 | } | |
4257 | } | |
cf43a2fe | 4258 | |
ec661b9d AM |
4259 | protected: |
4260 | void | |
4261 | do_adjust_output_section(Output_section* os) | |
4262 | { | |
4263 | os->set_entsize(0); | |
4264 | } | |
e5d5f5ed | 4265 | |
ec661b9d AM |
4266 | // Write to a map file. |
4267 | void | |
4268 | do_print_to_mapfile(Mapfile* mapfile) const | |
4269 | { mapfile->print_output_data(this, "** BRLT"); } | |
c9824451 | 4270 | |
ec661b9d AM |
4271 | private: |
4272 | // Write out the BRLT data. | |
4273 | void | |
4274 | do_write(Output_file*); | |
c9824451 | 4275 | |
ec661b9d AM |
4276 | // The reloc section. |
4277 | Reloc_section* rel_; | |
4278 | Target_powerpc<size, big_endian>* targ_; | |
4279 | }; | |
cf43a2fe | 4280 | |
ec661b9d AM |
4281 | // Make the branch lookup table section. |
4282 | ||
4283 | template<int size, bool big_endian> | |
4284 | void | |
4285 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) | |
4286 | { | |
4287 | if (size == 64 && this->brlt_section_ == NULL) | |
4288 | { | |
4289 | Reloc_section* brlt_rel = NULL; | |
4290 | bool is_pic = parameters->options().output_is_position_independent(); | |
4291 | if (is_pic) | |
4292 | { | |
54483898 AM |
4293 | // When PIC we can't fill in .branch_lt but must initialise at |
4294 | // runtime via dynamic relocations. | |
ec661b9d AM |
4295 | this->rela_dyn_section(layout); |
4296 | brlt_rel = new Reloc_section(false); | |
6528b6eb AM |
4297 | if (this->rela_dyn_->output_section()) |
4298 | this->rela_dyn_->output_section() | |
4299 | ->add_output_section_data(brlt_rel); | |
ec661b9d AM |
4300 | } |
4301 | this->brlt_section_ | |
4302 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); | |
6528b6eb | 4303 | if (this->plt_ && is_pic && this->plt_->output_section()) |
ec661b9d AM |
4304 | this->plt_->output_section() |
4305 | ->add_output_section_data(this->brlt_section_); | |
4306 | else | |
6830ee24 | 4307 | layout->add_output_section_data(".branch_lt", |
54483898 | 4308 | elfcpp::SHT_PROGBITS, |
ec661b9d AM |
4309 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
4310 | this->brlt_section_, | |
54483898 AM |
4311 | ORDER_RELRO, |
4312 | true); | |
ec661b9d AM |
4313 | } |
4314 | } | |
4315 | ||
6830ee24 | 4316 | // Write out .branch_lt when non-PIC. |
ec661b9d AM |
4317 | |
4318 | template<int size, bool big_endian> | |
4319 | void | |
4320 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) | |
4321 | { | |
4322 | if (size == 64 && !parameters->options().output_is_position_independent()) | |
4323 | { | |
4324 | const section_size_type offset = this->offset(); | |
4325 | const section_size_type oview_size | |
4326 | = convert_to_section_size_type(this->data_size()); | |
4327 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
4328 | ||
4329 | this->targ_->write_branch_lookup_table(oview); | |
4330 | of->write_output_view(offset, oview_size, oview); | |
4331 | } | |
4332 | } | |
4333 | ||
9e69ed50 AM |
4334 | static inline uint32_t |
4335 | l(uint32_t a) | |
4336 | { | |
4337 | return a & 0xffff; | |
4338 | } | |
4339 | ||
4340 | static inline uint32_t | |
4341 | hi(uint32_t a) | |
4342 | { | |
4343 | return l(a >> 16); | |
4344 | } | |
4345 | ||
4346 | static inline uint32_t | |
4347 | ha(uint32_t a) | |
4348 | { | |
4349 | return hi(a + 0x8000); | |
4350 | } | |
4351 | ||
9d5781f8 AM |
4352 | template<int size> |
4353 | struct Eh_cie | |
4354 | { | |
4355 | static const unsigned char eh_frame_cie[12]; | |
4356 | }; | |
4357 | ||
4358 | template<int size> | |
4359 | const unsigned char Eh_cie<size>::eh_frame_cie[] = | |
4360 | { | |
4361 | 1, // CIE version. | |
4362 | 'z', 'R', 0, // Augmentation string. | |
4363 | 4, // Code alignment. | |
4364 | 0x80 - size / 8 , // Data alignment. | |
4365 | 65, // RA reg. | |
4366 | 1, // Augmentation size. | |
4367 | (elfcpp::DW_EH_PE_pcrel | |
4368 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. | |
4369 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. | |
4370 | }; | |
4371 | ||
b4f7960d AM |
4372 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
4373 | static const unsigned char glink_eh_frame_fde_64v1[] = | |
9d5781f8 AM |
4374 | { |
4375 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4376 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4377 | 0, // Augmentation size. | |
4378 | elfcpp::DW_CFA_advance_loc + 1, | |
4379 | elfcpp::DW_CFA_register, 65, 12, | |
15a3a14f | 4380 | elfcpp::DW_CFA_advance_loc + 5, |
9d5781f8 AM |
4381 | elfcpp::DW_CFA_restore_extended, 65 |
4382 | }; | |
4383 | ||
b4f7960d AM |
4384 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
4385 | static const unsigned char glink_eh_frame_fde_64v2[] = | |
4386 | { | |
4387 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4388 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4389 | 0, // Augmentation size. | |
4390 | elfcpp::DW_CFA_advance_loc + 1, | |
4391 | elfcpp::DW_CFA_register, 65, 0, | |
15a3a14f | 4392 | elfcpp::DW_CFA_advance_loc + 7, |
b4f7960d AM |
4393 | elfcpp::DW_CFA_restore_extended, 65 |
4394 | }; | |
4395 | ||
9d5781f8 AM |
4396 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
4397 | static const unsigned char glink_eh_frame_fde_32[] = | |
4398 | { | |
4399 | 0, 0, 0, 0, // Replaced with offset to .glink. | |
4400 | 0, 0, 0, 0, // Replaced with size of .glink. | |
4401 | 0, // Augmentation size. | |
4402 | elfcpp::DW_CFA_advance_loc + 2, | |
4403 | elfcpp::DW_CFA_register, 65, 0, | |
4404 | elfcpp::DW_CFA_advance_loc + 4, | |
4405 | elfcpp::DW_CFA_restore_extended, 65 | |
4406 | }; | |
4407 | ||
4408 | static const unsigned char default_fde[] = | |
4409 | { | |
4410 | 0, 0, 0, 0, // Replaced with offset to stubs. | |
4411 | 0, 0, 0, 0, // Replaced with size of stubs. | |
4412 | 0, // Augmentation size. | |
4413 | elfcpp::DW_CFA_nop, // Pad. | |
4414 | elfcpp::DW_CFA_nop, | |
4415 | elfcpp::DW_CFA_nop | |
4416 | }; | |
4417 | ||
9e69ed50 AM |
4418 | template<bool big_endian> |
4419 | static inline void | |
4420 | write_insn(unsigned char* p, uint32_t v) | |
4421 | { | |
4422 | elfcpp::Swap<32, big_endian>::writeval(p, v); | |
4423 | } | |
4424 | ||
691d2e9a AM |
4425 | template<int size> |
4426 | static inline unsigned int | |
4427 | param_plt_align() | |
4428 | { | |
4429 | if (!parameters->options().user_set_plt_align()) | |
4430 | return size == 64 ? 32 : 8; | |
4431 | return 1 << parameters->options().plt_align(); | |
4432 | } | |
4433 | ||
ec661b9d AM |
4434 | // Stub_table holds information about plt and long branch stubs. |
4435 | // Stubs are built in an area following some input section determined | |
4436 | // by group_sections(). This input section is converted to a relaxed | |
4437 | // input section allowing it to be resized to accommodate the stubs | |
4438 | ||
4439 | template<int size, bool big_endian> | |
4440 | class Stub_table : public Output_relaxed_input_section | |
4441 | { | |
4442 | public: | |
7e57d19e AM |
4443 | struct Plt_stub_ent |
4444 | { | |
4445 | Plt_stub_ent(unsigned int off, unsigned int indx) | |
7ee7ff70 | 4446 | : off_(off), indx_(indx), r2save_(0), localentry0_(0) |
7e57d19e AM |
4447 | { } |
4448 | ||
4449 | unsigned int off_; | |
7ee7ff70 | 4450 | unsigned int indx_ : 30; |
7e57d19e | 4451 | unsigned int r2save_ : 1; |
7ee7ff70 | 4452 | unsigned int localentry0_ : 1; |
7e57d19e | 4453 | }; |
ec661b9d AM |
4454 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4455 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
4456 | ||
a3e60ddb AM |
4457 | Stub_table(Target_powerpc<size, big_endian>* targ, |
4458 | Output_section* output_section, | |
590b87ff AM |
4459 | const Output_section::Input_section* owner, |
4460 | uint32_t id) | |
a3e60ddb AM |
4461 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
4462 | owner->relobj() | |
4463 | ->section_addralign(owner->shndx())), | |
ec661b9d | 4464 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
a3e60ddb AM |
4465 | orig_data_size_(owner->current_data_size()), |
4466 | plt_size_(0), last_plt_size_(0), | |
6395d38b | 4467 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
34e0882b AM |
4468 | need_save_res_(false), uniq_(id), tls_get_addr_opt_bctrl_(-1u), |
4469 | plt_fde_len_(0) | |
a3e60ddb AM |
4470 | { |
4471 | this->set_output_section(output_section); | |
ec661b9d | 4472 | |
a3e60ddb AM |
4473 | std::vector<Output_relaxed_input_section*> new_relaxed; |
4474 | new_relaxed.push_back(this); | |
4475 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); | |
4476 | } | |
ec661b9d AM |
4477 | |
4478 | // Add a plt call stub. | |
a3e60ddb AM |
4479 | bool |
4480 | add_plt_call_entry(Address, | |
4481 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4482 | const Symbol*, |
4483 | unsigned int, | |
7e57d19e AM |
4484 | Address, |
4485 | bool); | |
ec661b9d | 4486 | |
a3e60ddb AM |
4487 | bool |
4488 | add_plt_call_entry(Address, | |
4489 | const Sized_relobj_file<size, big_endian>*, | |
ec661b9d AM |
4490 | unsigned int, |
4491 | unsigned int, | |
7e57d19e AM |
4492 | Address, |
4493 | bool); | |
ec661b9d AM |
4494 | |
4495 | // Find a given plt call stub. | |
7e57d19e | 4496 | const Plt_stub_ent* |
ec661b9d AM |
4497 | find_plt_call_entry(const Symbol*) const; |
4498 | ||
7e57d19e | 4499 | const Plt_stub_ent* |
ec661b9d AM |
4500 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4501 | unsigned int) const; | |
4502 | ||
7e57d19e | 4503 | const Plt_stub_ent* |
ec661b9d AM |
4504 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4505 | const Symbol*, | |
4506 | unsigned int, | |
4507 | Address) const; | |
4508 | ||
7e57d19e | 4509 | const Plt_stub_ent* |
ec661b9d AM |
4510 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
4511 | unsigned int, | |
4512 | unsigned int, | |
4513 | Address) const; | |
4514 | ||
4515 | // Add a long branch stub. | |
a3e60ddb AM |
4516 | bool |
4517 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, | |
d49044c7 | 4518 | unsigned int, Address, Address, bool); |
ec661b9d AM |
4519 | |
4520 | Address | |
9d5781f8 AM |
4521 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
4522 | Address) const; | |
ec661b9d | 4523 | |
a3e60ddb AM |
4524 | bool |
4525 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) | |
4526 | { | |
cbcb23fa | 4527 | Address max_branch_offset = max_branch_delta(r_type); |
a3e60ddb AM |
4528 | if (max_branch_offset == 0) |
4529 | return true; | |
4530 | gold_assert(from != invalid_address); | |
4531 | Address loc = off + this->stub_address(); | |
4532 | return loc - from + max_branch_offset < 2 * max_branch_offset; | |
4533 | } | |
4534 | ||
ec661b9d | 4535 | void |
a3e60ddb | 4536 | clear_stubs(bool all) |
cf43a2fe | 4537 | { |
9e69ed50 AM |
4538 | this->plt_call_stubs_.clear(); |
4539 | this->plt_size_ = 0; | |
ec661b9d AM |
4540 | this->long_branch_stubs_.clear(); |
4541 | this->branch_size_ = 0; | |
d49044c7 | 4542 | this->need_save_res_ = false; |
a3e60ddb AM |
4543 | if (all) |
4544 | { | |
4545 | this->last_plt_size_ = 0; | |
4546 | this->last_branch_size_ = 0; | |
4547 | } | |
cf43a2fe AM |
4548 | } |
4549 | ||
ec661b9d AM |
4550 | Address |
4551 | set_address_and_size(const Output_section* os, Address off) | |
cf43a2fe | 4552 | { |
ec661b9d AM |
4553 | Address start_off = off; |
4554 | off += this->orig_data_size_; | |
4555 | Address my_size = this->plt_size_ + this->branch_size_; | |
d49044c7 AM |
4556 | if (this->need_save_res_) |
4557 | my_size += this->targ_->savres_section()->data_size(); | |
ec661b9d AM |
4558 | if (my_size != 0) |
4559 | off = align_address(off, this->stub_align()); | |
4560 | // Include original section size and alignment padding in size | |
4561 | my_size += off - start_off; | |
6395d38b HS |
4562 | // Ensure new size is always larger than min size |
4563 | // threshold. Alignment requirement is included in "my_size", so | |
4564 | // increase "my_size" does not invalidate alignment. | |
4565 | if (my_size < this->min_size_threshold_) | |
4566 | my_size = this->min_size_threshold_; | |
ec661b9d AM |
4567 | this->reset_address_and_file_offset(); |
4568 | this->set_current_data_size(my_size); | |
4569 | this->set_address_and_file_offset(os->address() + start_off, | |
4570 | os->offset() + start_off); | |
4571 | return my_size; | |
cf43a2fe AM |
4572 | } |
4573 | ||
ec661b9d | 4574 | Address |
9d5781f8 | 4575 | stub_address() const |
ec661b9d AM |
4576 | { |
4577 | return align_address(this->address() + this->orig_data_size_, | |
4578 | this->stub_align()); | |
4579 | } | |
4580 | ||
4581 | Address | |
9d5781f8 | 4582 | stub_offset() const |
ec661b9d AM |
4583 | { |
4584 | return align_address(this->offset() + this->orig_data_size_, | |
4585 | this->stub_align()); | |
4586 | } | |
4587 | ||
4588 | section_size_type | |
4589 | plt_size() const | |
4590 | { return this->plt_size_; } | |
4591 | ||
590b87ff AM |
4592 | void |
4593 | set_min_size_threshold(Address min_size) | |
6395d38b HS |
4594 | { this->min_size_threshold_ = min_size; } |
4595 | ||
590b87ff AM |
4596 | void |
4597 | define_stub_syms(Symbol_table*); | |
4598 | ||
ec661b9d AM |
4599 | bool |
4600 | size_update() | |
4601 | { | |
4602 | Output_section* os = this->output_section(); | |
4603 | if (os->addralign() < this->stub_align()) | |
4604 | { | |
4605 | os->set_addralign(this->stub_align()); | |
4606 | // FIXME: get rid of the insane checkpointing. | |
4607 | // We can't increase alignment of the input section to which | |
4608 | // stubs are attached; The input section may be .init which | |
4609 | // is pasted together with other .init sections to form a | |
4610 | // function. Aligning might insert zero padding resulting in | |
4611 | // sigill. However we do need to increase alignment of the | |
4612 | // output section so that the align_address() on offset in | |
4613 | // set_address_and_size() adds the same padding as the | |
4614 | // align_address() on address in stub_address(). | |
4615 | // What's more, we need this alignment for the layout done in | |
4616 | // relaxation_loop_body() so that the output section starts at | |
4617 | // a suitably aligned address. | |
4618 | os->checkpoint_set_addralign(this->stub_align()); | |
4619 | } | |
9e69ed50 AM |
4620 | if (this->last_plt_size_ != this->plt_size_ |
4621 | || this->last_branch_size_ != this->branch_size_) | |
ec661b9d | 4622 | { |
9e69ed50 AM |
4623 | this->last_plt_size_ = this->plt_size_; |
4624 | this->last_branch_size_ = this->branch_size_; | |
ec661b9d AM |
4625 | return true; |
4626 | } | |
4627 | return false; | |
4628 | } | |
4629 | ||
34e0882b | 4630 | // Generate a suitable FDE to describe code in this stub group. |
9d5781f8 | 4631 | void |
34e0882b | 4632 | init_plt_fde(); |
be897fb7 | 4633 | |
34e0882b AM |
4634 | // Add .eh_frame info for this stub section. |
4635 | void | |
4636 | add_eh_frame(Layout* layout); | |
be897fb7 | 4637 | |
34e0882b | 4638 | // Remove .eh_frame info for this stub section. |
be897fb7 | 4639 | void |
34e0882b | 4640 | remove_eh_frame(Layout* layout); |
9d5781f8 | 4641 | |
ec661b9d AM |
4642 | Target_powerpc<size, big_endian>* |
4643 | targ() const | |
4644 | { return targ_; } | |
6ce78956 | 4645 | |
cf43a2fe | 4646 | private: |
bdab445c AM |
4647 | class Plt_stub_key; |
4648 | class Plt_stub_key_hash; | |
bdab445c AM |
4649 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
4650 | Plt_stub_key_hash> Plt_stub_entries; | |
590b87ff AM |
4651 | class Branch_stub_ent; |
4652 | class Branch_stub_ent_hash; | |
4653 | typedef Unordered_map<Branch_stub_ent, unsigned int, | |
4654 | Branch_stub_ent_hash> Branch_stub_entries; | |
9e69ed50 AM |
4655 | |
4656 | // Alignment of stub section. | |
ec661b9d | 4657 | unsigned int |
9e69ed50 AM |
4658 | stub_align() const |
4659 | { | |
691d2e9a | 4660 | unsigned int min_align = size == 64 ? 32 : 16; |
9e69ed50 AM |
4661 | unsigned int user_align = 1 << parameters->options().plt_align(); |
4662 | return std::max(user_align, min_align); | |
4663 | } | |
cf43a2fe | 4664 | |
91c2b899 AM |
4665 | // Return the plt offset for the given call stub. |
4666 | Address | |
08be3224 AM |
4667 | plt_off(typename Plt_stub_entries::const_iterator p, |
4668 | const Output_data_plt_powerpc<size, big_endian>** sec) const | |
91c2b899 AM |
4669 | { |
4670 | const Symbol* gsym = p->first.sym_; | |
4671 | if (gsym != NULL) | |
08be3224 | 4672 | return this->targ_->plt_off(gsym, sec); |
91c2b899 AM |
4673 | else |
4674 | { | |
91c2b899 AM |
4675 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; |
4676 | unsigned int local_sym_index = p->first.locsym_; | |
08be3224 | 4677 | return this->targ_->plt_off(relobj, local_sym_index, sec); |
91c2b899 AM |
4678 | } |
4679 | } | |
4680 | ||
9e69ed50 | 4681 | // Size of a given plt call stub. |
ec661b9d | 4682 | unsigned int |
9e69ed50 AM |
4683 | plt_call_size(typename Plt_stub_entries::const_iterator p) const |
4684 | { | |
4685 | if (size == 32) | |
34e0882b AM |
4686 | { |
4687 | const Symbol* gsym = p->first.sym_; | |
9e390558 AM |
4688 | return (4 * 4 |
4689 | + (this->targ_->is_tls_get_addr_opt(gsym) ? 8 * 4 : 0)); | |
34e0882b | 4690 | } |
9e69ed50 | 4691 | |
08be3224 AM |
4692 | const Output_data_plt_powerpc<size, big_endian>* plt; |
4693 | Address plt_addr = this->plt_off(p, &plt); | |
4694 | plt_addr += plt->address(); | |
91c2b899 | 4695 | Address got_addr = this->targ_->got_section()->output_section()->address(); |
9e69ed50 AM |
4696 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
4697 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); | |
91c2b899 AM |
4698 | got_addr += ppcobj->toc_base_offset(); |
4699 | Address off = plt_addr - got_addr; | |
b4f7960d | 4700 | unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0); |
34e0882b AM |
4701 | const Symbol* gsym = p->first.sym_; |
4702 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
4703 | bytes += 13 * 4; | |
b4f7960d AM |
4704 | if (this->targ_->abiversion() < 2) |
4705 | { | |
4706 | bool static_chain = parameters->options().plt_static_chain(); | |
4707 | bool thread_safe = this->targ_->plt_thread_safe(); | |
4708 | bytes += (4 | |
4709 | + 4 * static_chain | |
4710 | + 8 * thread_safe | |
4711 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); | |
4712 | } | |
34e0882b AM |
4713 | return bytes; |
4714 | } | |
4715 | ||
4716 | unsigned int | |
4717 | plt_call_align(unsigned int bytes) const | |
4718 | { | |
691d2e9a | 4719 | unsigned int align = param_plt_align<size>(); |
9e390558 | 4720 | return (bytes + align - 1) & -align; |
9e69ed50 | 4721 | } |
ec661b9d AM |
4722 | |
4723 | // Return long branch stub size. | |
4724 | unsigned int | |
590b87ff | 4725 | branch_stub_size(typename Branch_stub_entries::const_iterator p) |
ec661b9d | 4726 | { |
590b87ff AM |
4727 | Address loc = this->stub_address() + this->last_plt_size_ + p->second; |
4728 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) | |
ec661b9d | 4729 | return 4; |
9e390558 AM |
4730 | unsigned int bytes = 16; |
4731 | if (size == 32 && parameters->options().output_is_position_independent()) | |
4732 | bytes += 16; | |
4733 | return bytes; | |
ec661b9d AM |
4734 | } |
4735 | ||
4736 | // Write out stubs. | |
cf43a2fe AM |
4737 | void |
4738 | do_write(Output_file*); | |
4739 | ||
ec661b9d | 4740 | // Plt call stub keys. |
bdab445c | 4741 | class Plt_stub_key |
cf43a2fe | 4742 | { |
d1a8cabd | 4743 | public: |
bdab445c | 4744 | Plt_stub_key(const Symbol* sym) |
c9824451 AM |
4745 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
4746 | { } | |
4747 | ||
bdab445c | 4748 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d | 4749 | unsigned int locsym_index) |
c9824451 AM |
4750 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4751 | { } | |
4752 | ||
bdab445c | 4753 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4754 | const Symbol* sym, |
4755 | unsigned int r_type, | |
4756 | Address addend) | |
e5d5f5ed | 4757 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
cf43a2fe AM |
4758 | { |
4759 | if (size != 32) | |
ec661b9d | 4760 | this->addend_ = addend; |
d1a8cabd | 4761 | else if (parameters->options().output_is_position_independent() |
23cedd1d AM |
4762 | && (r_type == elfcpp::R_PPC_PLTREL24 |
4763 | || r_type == elfcpp::R_POWERPC_PLTCALL)) | |
cf43a2fe | 4764 | { |
ec661b9d | 4765 | this->addend_ = addend; |
e5d5f5ed | 4766 | if (this->addend_ >= 32768) |
d1a8cabd | 4767 | this->object_ = object; |
cf43a2fe AM |
4768 | } |
4769 | } | |
4770 | ||
bdab445c | 4771 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
ec661b9d AM |
4772 | unsigned int locsym_index, |
4773 | unsigned int r_type, | |
4774 | Address addend) | |
e5d5f5ed AM |
4775 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
4776 | { | |
4777 | if (size != 32) | |
ec661b9d | 4778 | this->addend_ = addend; |
e5d5f5ed | 4779 | else if (parameters->options().output_is_position_independent() |
23cedd1d AM |
4780 | && (r_type == elfcpp::R_PPC_PLTREL24 |
4781 | || r_type == elfcpp::R_POWERPC_PLTCALL)) | |
ec661b9d | 4782 | this->addend_ = addend; |
e5d5f5ed AM |
4783 | } |
4784 | ||
bdab445c | 4785 | bool operator==(const Plt_stub_key& that) const |
cf43a2fe AM |
4786 | { |
4787 | return (this->sym_ == that.sym_ | |
4788 | && this->object_ == that.object_ | |
e5d5f5ed AM |
4789 | && this->addend_ == that.addend_ |
4790 | && this->locsym_ == that.locsym_); | |
cf43a2fe | 4791 | } |
c9269dff AM |
4792 | |
4793 | const Symbol* sym_; | |
e5d5f5ed AM |
4794 | const Sized_relobj_file<size, big_endian>* object_; |
4795 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; | |
4796 | unsigned int locsym_; | |
cf43a2fe AM |
4797 | }; |
4798 | ||
bdab445c | 4799 | class Plt_stub_key_hash |
cf43a2fe | 4800 | { |
d1a8cabd | 4801 | public: |
bdab445c | 4802 | size_t operator()(const Plt_stub_key& ent) const |
cf43a2fe AM |
4803 | { |
4804 | return (reinterpret_cast<uintptr_t>(ent.sym_) | |
4805 | ^ reinterpret_cast<uintptr_t>(ent.object_) | |
e5d5f5ed AM |
4806 | ^ ent.addend_ |
4807 | ^ ent.locsym_); | |
cf43a2fe | 4808 | } |
ec661b9d AM |
4809 | }; |
4810 | ||
4811 | // Long branch stub keys. | |
4812 | class Branch_stub_ent | |
4813 | { | |
4814 | public: | |
d49044c7 AM |
4815 | Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, |
4816 | Address to, bool save_res) | |
4817 | : dest_(to), toc_base_off_(0), save_res_(save_res) | |
ec661b9d AM |
4818 | { |
4819 | if (size == 64) | |
4820 | toc_base_off_ = obj->toc_base_offset(); | |
4821 | } | |
4822 | ||
4823 | bool operator==(const Branch_stub_ent& that) const | |
4824 | { | |
4825 | return (this->dest_ == that.dest_ | |
4826 | && (size == 32 | |
4827 | || this->toc_base_off_ == that.toc_base_off_)); | |
4828 | } | |
cf43a2fe | 4829 | |
ec661b9d AM |
4830 | Address dest_; |
4831 | unsigned int toc_base_off_; | |
d49044c7 | 4832 | bool save_res_; |
ec661b9d | 4833 | }; |
cf43a2fe | 4834 | |
ec661b9d AM |
4835 | class Branch_stub_ent_hash |
4836 | { | |
4837 | public: | |
4838 | size_t operator()(const Branch_stub_ent& ent) const | |
4839 | { return ent.dest_ ^ ent.toc_base_off_; } | |
4840 | }; | |
cf43a2fe | 4841 | |
ec661b9d | 4842 | // In a sane world this would be a global. |
cf43a2fe | 4843 | Target_powerpc<size, big_endian>* targ_; |
ec661b9d | 4844 | // Map sym/object/addend to stub offset. |
ec661b9d AM |
4845 | Plt_stub_entries plt_call_stubs_; |
4846 | // Map destination address to stub offset. | |
ec661b9d AM |
4847 | Branch_stub_entries long_branch_stubs_; |
4848 | // size of input section | |
4849 | section_size_type orig_data_size_; | |
4850 | // size of stubs | |
9e69ed50 | 4851 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
6395d38b HS |
4852 | // Some rare cases cause (PR/20529) fluctuation in stub table |
4853 | // size, which leads to an endless relax loop. This is to be fixed | |
4854 | // by, after the first few iterations, allowing only increase of | |
4855 | // stub table size. This variable sets the minimal possible size of | |
4856 | // a stub table, it is zero for the first few iterations, then | |
4857 | // increases monotonically. | |
4858 | Address min_size_threshold_; | |
d49044c7 AM |
4859 | // Set if this stub group needs a copy of out-of-line register |
4860 | // save/restore functions. | |
4861 | bool need_save_res_; | |
590b87ff AM |
4862 | // Per stub table unique identifier. |
4863 | uint32_t uniq_; | |
34e0882b AM |
4864 | // The bctrl in the __tls_get_addr_opt stub, if present. |
4865 | unsigned int tls_get_addr_opt_bctrl_; | |
4866 | // FDE unwind info for this stub group. | |
4867 | unsigned int plt_fde_len_; | |
4868 | unsigned char plt_fde_[20]; | |
cf43a2fe AM |
4869 | }; |
4870 | ||
ec661b9d | 4871 | // Add a plt call stub, if we do not already have one for this |
d1a8cabd | 4872 | // sym/object/addend combo. |
cf43a2fe AM |
4873 | |
4874 | template<int size, bool big_endian> | |
a3e60ddb | 4875 | bool |
ec661b9d | 4876 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4877 | Address from, |
c9824451 | 4878 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4879 | const Symbol* gsym, |
ec661b9d | 4880 | unsigned int r_type, |
7e57d19e AM |
4881 | Address addend, |
4882 | bool tocsave) | |
cf43a2fe | 4883 | { |
bdab445c AM |
4884 | Plt_stub_key key(object, gsym, r_type, addend); |
4885 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4886 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4887 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4888 | if (p.second) |
7ee7ff70 AM |
4889 | { |
4890 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
4891 | if (size == 64 | |
4892 | && this->targ_->is_elfv2_localentry0(gsym)) | |
4893 | { | |
4894 | p.first->second.localentry0_ = 1; | |
4895 | this->targ_->set_has_localentry0(); | |
4896 | } | |
34e0882b AM |
4897 | if (this->targ_->is_tls_get_addr_opt(gsym)) |
4898 | { | |
4899 | this->targ_->set_has_tls_get_addr_opt(); | |
4900 | this->tls_get_addr_opt_bctrl_ = this->plt_size_ - 5 * 4; | |
4901 | } | |
4902 | this->plt_size_ = this->plt_call_align(this->plt_size_); | |
7ee7ff70 AM |
4903 | } |
4904 | if (size == 64 | |
4905 | && !tocsave | |
4906 | && !p.first->second.localentry0_) | |
7e57d19e | 4907 | p.first->second.r2save_ = 1; |
bdab445c | 4908 | return this->can_reach_stub(from, ent.off_, r_type); |
cf43a2fe AM |
4909 | } |
4910 | ||
e5d5f5ed | 4911 | template<int size, bool big_endian> |
a3e60ddb | 4912 | bool |
ec661b9d | 4913 | Stub_table<size, big_endian>::add_plt_call_entry( |
a3e60ddb | 4914 | Address from, |
c9824451 | 4915 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4916 | unsigned int locsym_index, |
ec661b9d | 4917 | unsigned int r_type, |
7e57d19e AM |
4918 | Address addend, |
4919 | bool tocsave) | |
e5d5f5ed | 4920 | { |
bdab445c AM |
4921 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4922 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); | |
9e69ed50 | 4923 | std::pair<typename Plt_stub_entries::iterator, bool> p |
bdab445c | 4924 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
9e69ed50 | 4925 | if (p.second) |
7ee7ff70 AM |
4926 | { |
4927 | this->plt_size_ = ent.off_ + this->plt_call_size(p.first); | |
34e0882b | 4928 | this->plt_size_ = this->plt_call_align(this->plt_size_); |
7ee7ff70 AM |
4929 | if (size == 64 |
4930 | && this->targ_->is_elfv2_localentry0(object, locsym_index)) | |
4931 | { | |
4932 | p.first->second.localentry0_ = 1; | |
4933 | this->targ_->set_has_localentry0(); | |
4934 | } | |
4935 | } | |
4936 | if (size == 64 | |
4937 | && !tocsave | |
4938 | && !p.first->second.localentry0_) | |
7e57d19e | 4939 | p.first->second.r2save_ = 1; |
bdab445c | 4940 | return this->can_reach_stub(from, ent.off_, r_type); |
e5d5f5ed AM |
4941 | } |
4942 | ||
ec661b9d AM |
4943 | // Find a plt call stub. |
4944 | ||
cf43a2fe | 4945 | template<int size, bool big_endian> |
7e57d19e | 4946 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4947 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4948 | const Sized_relobj_file<size, big_endian>* object, |
d83ce4e3 | 4949 | const Symbol* gsym, |
ec661b9d AM |
4950 | unsigned int r_type, |
4951 | Address addend) const | |
c9824451 | 4952 | { |
bdab445c AM |
4953 | Plt_stub_key key(object, gsym, r_type, addend); |
4954 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4955 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4956 | return NULL; |
4957 | return &p->second; | |
c9824451 AM |
4958 | } |
4959 | ||
4960 | template<int size, bool big_endian> | |
7e57d19e | 4961 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4962 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
cf43a2fe | 4963 | { |
bdab445c AM |
4964 | Plt_stub_key key(gsym); |
4965 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4966 | if (p == this->plt_call_stubs_.end()) |
4967 | return NULL; | |
4968 | return &p->second; | |
cf43a2fe AM |
4969 | } |
4970 | ||
e5d5f5ed | 4971 | template<int size, bool big_endian> |
7e57d19e | 4972 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4973 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 | 4974 | const Sized_relobj_file<size, big_endian>* object, |
e5d5f5ed | 4975 | unsigned int locsym_index, |
ec661b9d AM |
4976 | unsigned int r_type, |
4977 | Address addend) const | |
e5d5f5ed | 4978 | { |
bdab445c AM |
4979 | Plt_stub_key key(object, locsym_index, r_type, addend); |
4980 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
4981 | if (p == this->plt_call_stubs_.end()) | |
7e57d19e AM |
4982 | return NULL; |
4983 | return &p->second; | |
c9824451 AM |
4984 | } |
4985 | ||
4986 | template<int size, bool big_endian> | |
7e57d19e | 4987 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
ec661b9d | 4988 | Stub_table<size, big_endian>::find_plt_call_entry( |
c9824451 AM |
4989 | const Sized_relobj_file<size, big_endian>* object, |
4990 | unsigned int locsym_index) const | |
4991 | { | |
bdab445c AM |
4992 | Plt_stub_key key(object, locsym_index); |
4993 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); | |
7e57d19e AM |
4994 | if (p == this->plt_call_stubs_.end()) |
4995 | return NULL; | |
4996 | return &p->second; | |
ec661b9d AM |
4997 | } |
4998 | ||
4999 | // Add a long branch stub if we don't already have one to given | |
5000 | // destination. | |
5001 | ||
5002 | template<int size, bool big_endian> | |
a3e60ddb | 5003 | bool |
ec661b9d AM |
5004 | Stub_table<size, big_endian>::add_long_branch_entry( |
5005 | const Powerpc_relobj<size, big_endian>* object, | |
a3e60ddb AM |
5006 | unsigned int r_type, |
5007 | Address from, | |
d49044c7 AM |
5008 | Address to, |
5009 | bool save_res) | |
ec661b9d | 5010 | { |
d49044c7 | 5011 | Branch_stub_ent ent(object, to, save_res); |
ec661b9d | 5012 | Address off = this->branch_size_; |
590b87ff AM |
5013 | std::pair<typename Branch_stub_entries::iterator, bool> p |
5014 | = this->long_branch_stubs_.insert(std::make_pair(ent, off)); | |
5015 | if (p.second) | |
ec661b9d | 5016 | { |
d49044c7 AM |
5017 | if (save_res) |
5018 | this->need_save_res_ = true; | |
5019 | else | |
5020 | { | |
590b87ff | 5021 | unsigned int stub_size = this->branch_stub_size(p.first); |
d49044c7 AM |
5022 | this->branch_size_ = off + stub_size; |
5023 | if (size == 64 && stub_size != 4) | |
5024 | this->targ_->add_branch_lookup_table(to); | |
5025 | } | |
ec661b9d | 5026 | } |
a3e60ddb | 5027 | return this->can_reach_stub(from, off, r_type); |
ec661b9d AM |
5028 | } |
5029 | ||
d49044c7 | 5030 | // Find long branch stub offset. |
ec661b9d AM |
5031 | |
5032 | template<int size, bool big_endian> | |
ec5b8187 | 5033 | typename Stub_table<size, big_endian>::Address |
ec661b9d AM |
5034 | Stub_table<size, big_endian>::find_long_branch_entry( |
5035 | const Powerpc_relobj<size, big_endian>* object, | |
9d5781f8 | 5036 | Address to) const |
ec661b9d | 5037 | { |
d49044c7 | 5038 | Branch_stub_ent ent(object, to, false); |
ec661b9d AM |
5039 | typename Branch_stub_entries::const_iterator p |
5040 | = this->long_branch_stubs_.find(ent); | |
d49044c7 AM |
5041 | if (p == this->long_branch_stubs_.end()) |
5042 | return invalid_address; | |
5043 | if (p->first.save_res_) | |
5044 | return to - this->targ_->savres_section()->address() + this->branch_size_; | |
5045 | return p->second; | |
e5d5f5ed AM |
5046 | } |
5047 | ||
34e0882b AM |
5048 | // Generate a suitable FDE to describe code in this stub group. |
5049 | // The __tls_get_addr_opt call stub needs to describe where it saves | |
5050 | // LR, to support exceptions that might be thrown from __tls_get_addr. | |
5051 | ||
5052 | template<int size, bool big_endian> | |
5053 | void | |
5054 | Stub_table<size, big_endian>::init_plt_fde() | |
5055 | { | |
5056 | unsigned char* p = this->plt_fde_; | |
5057 | // offset pcrel sdata4, size udata4, and augmentation size byte. | |
5058 | memset (p, 0, 9); | |
5059 | p += 9; | |
5060 | if (this->tls_get_addr_opt_bctrl_ != -1u) | |
5061 | { | |
5062 | unsigned int to_bctrl = this->tls_get_addr_opt_bctrl_ / 4; | |
5063 | if (to_bctrl < 64) | |
5064 | *p++ = elfcpp::DW_CFA_advance_loc + to_bctrl; | |
5065 | else if (to_bctrl < 256) | |
5066 | { | |
5067 | *p++ = elfcpp::DW_CFA_advance_loc1; | |
5068 | *p++ = to_bctrl; | |
5069 | } | |
5070 | else if (to_bctrl < 65536) | |
5071 | { | |
5072 | *p++ = elfcpp::DW_CFA_advance_loc2; | |
5073 | elfcpp::Swap<16, big_endian>::writeval(p, to_bctrl); | |
5074 | p += 2; | |
5075 | } | |
5076 | else | |
5077 | { | |
5078 | *p++ = elfcpp::DW_CFA_advance_loc4; | |
5079 | elfcpp::Swap<32, big_endian>::writeval(p, to_bctrl); | |
5080 | p += 4; | |
5081 | } | |
5082 | *p++ = elfcpp::DW_CFA_offset_extended_sf; | |
5083 | *p++ = 65; | |
5084 | *p++ = -(this->targ_->stk_linker() / 8) & 0x7f; | |
5085 | *p++ = elfcpp::DW_CFA_advance_loc + 4; | |
5086 | *p++ = elfcpp::DW_CFA_restore_extended; | |
5087 | *p++ = 65; | |
5088 | } | |
5089 | this->plt_fde_len_ = p - this->plt_fde_; | |
5090 | } | |
5091 | ||
5092 | // Add .eh_frame info for this stub section. Unlike other linker | |
5093 | // generated .eh_frame this is added late in the link, because we | |
5094 | // only want the .eh_frame info if this particular stub section is | |
5095 | // non-empty. | |
5096 | ||
5097 | template<int size, bool big_endian> | |
5098 | void | |
5099 | Stub_table<size, big_endian>::add_eh_frame(Layout* layout) | |
5100 | { | |
5101 | if (!parameters->options().ld_generated_unwind_info()) | |
5102 | return; | |
5103 | ||
5104 | // Since we add stub .eh_frame info late, it must be placed | |
5105 | // after all other linker generated .eh_frame info so that | |
5106 | // merge mapping need not be updated for input sections. | |
5107 | // There is no provision to use a different CIE to that used | |
5108 | // by .glink. | |
5109 | if (!this->targ_->has_glink()) | |
5110 | return; | |
5111 | ||
5112 | if (this->plt_size_ + this->branch_size_ + this->need_save_res_ == 0) | |
5113 | return; | |
5114 | ||
5115 | this->init_plt_fde(); | |
5116 | layout->add_eh_frame_for_plt(this, | |
5117 | Eh_cie<size>::eh_frame_cie, | |
5118 | sizeof (Eh_cie<size>::eh_frame_cie), | |
5119 | this->plt_fde_, this->plt_fde_len_); | |
5120 | } | |
5121 | ||
5122 | template<int size, bool big_endian> | |
5123 | void | |
5124 | Stub_table<size, big_endian>::remove_eh_frame(Layout* layout) | |
5125 | { | |
5126 | if (this->plt_fde_len_ != 0) | |
5127 | { | |
5128 | layout->remove_eh_frame_for_plt(this, | |
5129 | Eh_cie<size>::eh_frame_cie, | |
5130 | sizeof (Eh_cie<size>::eh_frame_cie), | |
5131 | this->plt_fde_, this->plt_fde_len_); | |
5132 | this->plt_fde_len_ = 0; | |
5133 | } | |
5134 | } | |
5135 | ||
ec661b9d AM |
5136 | // A class to handle .glink. |
5137 | ||
5138 | template<int size, bool big_endian> | |
5139 | class Output_data_glink : public Output_section_data | |
5140 | { | |
5141 | public: | |
9055360d AM |
5142 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
5143 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
ec661b9d AM |
5144 | |
5145 | Output_data_glink(Target_powerpc<size, big_endian>* targ) | |
9055360d AM |
5146 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
5147 | end_branch_table_(), ge_size_(0) | |
ec661b9d AM |
5148 | { } |
5149 | ||
9d5781f8 | 5150 | void |
9055360d | 5151 | add_eh_frame(Layout* layout); |
9d5781f8 | 5152 | |
9055360d AM |
5153 | void |
5154 | add_global_entry(const Symbol*); | |
5155 | ||
5156 | Address | |
5157 | find_global_entry(const Symbol*) const; | |
5158 | ||
9e390558 AM |
5159 | unsigned int |
5160 | global_entry_align(unsigned int off) const | |
5161 | { | |
691d2e9a | 5162 | unsigned int align = param_plt_align<size>(); |
9e390558 AM |
5163 | return (off + align - 1) & -align; |
5164 | } | |
5165 | ||
5166 | unsigned int | |
5167 | global_entry_off() const | |
5168 | { | |
5169 | return this->global_entry_align(this->end_branch_table_); | |
5170 | } | |
5171 | ||
9055360d AM |
5172 | Address |
5173 | global_entry_address() const | |
5174 | { | |
5175 | gold_assert(this->is_data_size_valid()); | |
9e390558 AM |
5176 | return this->address() + this->global_entry_off(); |
5177 | } | |
5178 | ||
5179 | int | |
5180 | pltresolve_size() const | |
5181 | { | |
5182 | if (size == 64) | |
5183 | return (8 | |
407aa07c | 5184 | + (this->targ_->abiversion() < 2 ? 11 * 4 : 14 * 4)); |
9e390558 | 5185 | return 16 * 4; |
9d5781f8 AM |
5186 | } |
5187 | ||
ec661b9d AM |
5188 | protected: |
5189 | // Write to a map file. | |
5190 | void | |
5191 | do_print_to_mapfile(Mapfile* mapfile) const | |
5192 | { mapfile->print_output_data(this, _("** glink")); } | |
5193 | ||
5194 | private: | |
5195 | void | |
5196 | set_final_data_size(); | |
5197 | ||
5198 | // Write out .glink | |
5199 | void | |
5200 | do_write(Output_file*); | |
5201 | ||
5202 | // Allows access to .got and .plt for do_write. | |
5203 | Target_powerpc<size, big_endian>* targ_; | |
9055360d AM |
5204 | |
5205 | // Map sym to stub offset. | |
5206 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; | |
5207 | Global_entry_stub_entries global_entry_stubs_; | |
5208 | ||
5209 | unsigned int end_branch_table_, ge_size_; | |
ec661b9d AM |
5210 | }; |
5211 | ||
9055360d AM |
5212 | template<int size, bool big_endian> |
5213 | void | |
5214 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) | |
5215 | { | |
5216 | if (!parameters->options().ld_generated_unwind_info()) | |
5217 | return; | |
5218 | ||
5219 | if (size == 64) | |
5220 | { | |
5221 | if (this->targ_->abiversion() < 2) | |
5222 | layout->add_eh_frame_for_plt(this, | |
5223 | Eh_cie<64>::eh_frame_cie, | |
5224 | sizeof (Eh_cie<64>::eh_frame_cie), | |
5225 | glink_eh_frame_fde_64v1, | |
5226 | sizeof (glink_eh_frame_fde_64v1)); | |
5227 | else | |
5228 | layout->add_eh_frame_for_plt(this, | |
5229 | Eh_cie<64>::eh_frame_cie, | |
5230 | sizeof (Eh_cie<64>::eh_frame_cie), | |
5231 | glink_eh_frame_fde_64v2, | |
5232 | sizeof (glink_eh_frame_fde_64v2)); | |
5233 | } | |
5234 | else | |
5235 | { | |
5236 | // 32-bit .glink can use the default since the CIE return | |
5237 | // address reg, LR, is valid. | |
5238 | layout->add_eh_frame_for_plt(this, | |
5239 | Eh_cie<32>::eh_frame_cie, | |
5240 | sizeof (Eh_cie<32>::eh_frame_cie), | |
5241 | default_fde, | |
5242 | sizeof (default_fde)); | |
5243 | // Except where LR is used in a PIC __glink_PLTresolve. | |
5244 | if (parameters->options().output_is_position_independent()) | |
5245 | layout->add_eh_frame_for_plt(this, | |
5246 | Eh_cie<32>::eh_frame_cie, | |
5247 | sizeof (Eh_cie<32>::eh_frame_cie), | |
5248 | glink_eh_frame_fde_32, | |
5249 | sizeof (glink_eh_frame_fde_32)); | |
5250 | } | |
5251 | } | |
5252 | ||
5253 | template<int size, bool big_endian> | |
5254 | void | |
5255 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) | |
5256 | { | |
9e390558 | 5257 | unsigned int off = this->global_entry_align(this->ge_size_); |
9055360d | 5258 | std::pair<typename Global_entry_stub_entries::iterator, bool> p |
9e390558 | 5259 | = this->global_entry_stubs_.insert(std::make_pair(gsym, off)); |
9055360d | 5260 | if (p.second) |
407aa07c | 5261 | this->ge_size_ = off + 16; |
9055360d AM |
5262 | } |
5263 | ||
5264 | template<int size, bool big_endian> | |
5265 | typename Output_data_glink<size, big_endian>::Address | |
5266 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const | |
5267 | { | |
5268 | typename Global_entry_stub_entries::const_iterator p | |
5269 | = this->global_entry_stubs_.find(gsym); | |
5270 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; | |
5271 | } | |
5272 | ||
cf43a2fe AM |
5273 | template<int size, bool big_endian> |
5274 | void | |
5275 | Output_data_glink<size, big_endian>::set_final_data_size() | |
5276 | { | |
ec661b9d AM |
5277 | unsigned int count = this->targ_->plt_entry_count(); |
5278 | section_size_type total = 0; | |
cf43a2fe AM |
5279 | |
5280 | if (count != 0) | |
5281 | { | |
5282 | if (size == 32) | |
5283 | { | |
cf43a2fe AM |
5284 | // space for branch table |
5285 | total += 4 * (count - 1); | |
5286 | ||
5287 | total += -total & 15; | |
9e390558 | 5288 | total += this->pltresolve_size(); |
cf43a2fe AM |
5289 | } |
5290 | else | |
5291 | { | |
9e390558 | 5292 | total += this->pltresolve_size(); |
cf43a2fe AM |
5293 | |
5294 | // space for branch table | |
b4f7960d AM |
5295 | total += 4 * count; |
5296 | if (this->targ_->abiversion() < 2) | |
5297 | { | |
5298 | total += 4 * count; | |
5299 | if (count > 0x8000) | |
5300 | total += 4 * (count - 0x8000); | |
5301 | } | |
cf43a2fe AM |
5302 | } |
5303 | } | |
9055360d | 5304 | this->end_branch_table_ = total; |
9e390558 | 5305 | total = this->global_entry_align(total); |
9055360d | 5306 | total += this->ge_size_; |
cf43a2fe AM |
5307 | |
5308 | this->set_data_size(total); | |
5309 | } | |
5310 | ||
590b87ff AM |
5311 | // Define symbols on stubs, identifying the stub. |
5312 | ||
5313 | template<int size, bool big_endian> | |
5314 | void | |
5315 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) | |
5316 | { | |
5317 | if (!this->plt_call_stubs_.empty()) | |
5318 | { | |
5319 | // The key for the plt call stub hash table includes addresses, | |
5320 | // therefore traversal order depends on those addresses, which | |
5321 | // can change between runs if gold is a PIE. Unfortunately the | |
5322 | // output .symtab ordering depends on the order in which symbols | |
5323 | // are added to the linker symtab. We want reproducible output | |
5324 | // so must sort the call stub symbols. | |
5325 | typedef typename Plt_stub_entries::const_iterator plt_iter; | |
5326 | std::vector<plt_iter> sorted; | |
5327 | sorted.resize(this->plt_call_stubs_.size()); | |
5328 | ||
5329 | for (plt_iter cs = this->plt_call_stubs_.begin(); | |
5330 | cs != this->plt_call_stubs_.end(); | |
5331 | ++cs) | |
bdab445c | 5332 | sorted[cs->second.indx_] = cs; |
590b87ff AM |
5333 | |
5334 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) | |
5335 | { | |
5336 | plt_iter cs = sorted[i]; | |
5337 | char add[10]; | |
5338 | add[0] = 0; | |
5339 | if (cs->first.addend_ != 0) | |
5340 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); | |
94de2a2c JC |
5341 | char obj[10]; |
5342 | obj[0] = 0; | |
5343 | if (cs->first.object_) | |
590b87ff AM |
5344 | { |
5345 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast | |
5346 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
94de2a2c JC |
5347 | sprintf(obj, "%x:", ppcobj->uniq()); |
5348 | } | |
5349 | char localname[9]; | |
5350 | const char *symname; | |
5351 | if (cs->first.sym_ == NULL) | |
5352 | { | |
5353 | sprintf(localname, "%x", cs->first.locsym_); | |
590b87ff AM |
5354 | symname = localname; |
5355 | } | |
34e0882b AM |
5356 | else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
5357 | symname = this->targ_->tls_get_addr_opt()->name(); | |
590b87ff AM |
5358 | else |
5359 | symname = cs->first.sym_->name(); | |
94de2a2c JC |
5360 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
5361 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); | |
bdab445c AM |
5362 | Address value |
5363 | = this->stub_address() - this->address() + cs->second.off_; | |
34e0882b | 5364 | unsigned int stub_size = this->plt_call_align(this->plt_call_size(cs)); |
590b87ff AM |
5365 | this->targ_->define_local(symtab, name, this, value, stub_size); |
5366 | } | |
5367 | } | |
5368 | ||
5369 | typedef typename Branch_stub_entries::const_iterator branch_iter; | |
5370 | for (branch_iter bs = this->long_branch_stubs_.begin(); | |
5371 | bs != this->long_branch_stubs_.end(); | |
5372 | ++bs) | |
5373 | { | |
5374 | if (bs->first.save_res_) | |
5375 | continue; | |
5376 | ||
5377 | char* name = new char[8 + 13 + 16 + 1]; | |
5378 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, | |
5379 | static_cast<unsigned long long>(bs->first.dest_)); | |
5380 | Address value = (this->stub_address() - this->address() | |
5381 | + this->plt_size_ + bs->second); | |
5382 | unsigned int stub_size = this->branch_stub_size(bs); | |
5383 | this->targ_->define_local(symtab, name, this, value, stub_size); | |
5384 | } | |
5385 | } | |
5386 | ||
ec661b9d | 5387 | // Write out plt and long branch stub code. |
cf43a2fe AM |
5388 | |
5389 | template<int size, bool big_endian> | |
5390 | void | |
ec661b9d | 5391 | Stub_table<size, big_endian>::do_write(Output_file* of) |
cf43a2fe | 5392 | { |
ec661b9d AM |
5393 | if (this->plt_call_stubs_.empty() |
5394 | && this->long_branch_stubs_.empty()) | |
5395 | return; | |
5396 | ||
5397 | const section_size_type start_off = this->offset(); | |
5398 | const section_size_type off = this->stub_offset(); | |
42cacb20 | 5399 | const section_size_type oview_size = |
ec661b9d | 5400 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
cf43a2fe | 5401 | unsigned char* const oview = of->get_output_view(off, oview_size); |
c9269dff | 5402 | unsigned char* p; |
42cacb20 | 5403 | |
cf43a2fe AM |
5404 | if (size == 64) |
5405 | { | |
ec661b9d AM |
5406 | const Output_data_got_powerpc<size, big_endian>* got |
5407 | = this->targ_->got_section(); | |
dd93cd0a | 5408 | Address got_os_addr = got->output_section()->address(); |
c9269dff | 5409 | |
ec661b9d | 5410 | if (!this->plt_call_stubs_.empty()) |
cf43a2fe | 5411 | { |
ec661b9d AM |
5412 | // Write out plt call stubs. |
5413 | typename Plt_stub_entries::const_iterator cs; | |
5414 | for (cs = this->plt_call_stubs_.begin(); | |
5415 | cs != this->plt_call_stubs_.end(); | |
5416 | ++cs) | |
e5d5f5ed | 5417 | { |
08be3224 AM |
5418 | const Output_data_plt_powerpc<size, big_endian>* plt; |
5419 | Address pltoff = this->plt_off(cs, &plt); | |
5420 | Address plt_addr = pltoff + plt->address(); | |
ec661b9d AM |
5421 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
5422 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); | |
5423 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); | |
9e69ed50 | 5424 | Address off = plt_addr - got_addr; |
ec661b9d | 5425 | |
9e69ed50 | 5426 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
ec661b9d AM |
5427 | gold_error(_("%s: linkage table error against `%s'"), |
5428 | cs->first.object_->name().c_str(), | |
5429 | cs->first.sym_->demangled_name().c_str()); | |
5430 | ||
b4f7960d AM |
5431 | bool plt_load_toc = this->targ_->abiversion() < 2; |
5432 | bool static_chain | |
5433 | = plt_load_toc && parameters->options().plt_static_chain(); | |
5434 | bool thread_safe | |
5435 | = plt_load_toc && this->targ_->plt_thread_safe(); | |
9e69ed50 AM |
5436 | bool use_fake_dep = false; |
5437 | Address cmp_branch_off = 0; | |
407aa07c | 5438 | if (thread_safe) |
9e69ed50 AM |
5439 | { |
5440 | unsigned int pltindex | |
5441 | = ((pltoff - this->targ_->first_plt_entry_offset()) | |
5442 | / this->targ_->plt_entry_size()); | |
5443 | Address glinkoff | |
9e390558 | 5444 | = (this->targ_->glink_section()->pltresolve_size() |
9e69ed50 AM |
5445 | + pltindex * 8); |
5446 | if (pltindex > 32768) | |
5447 | glinkoff += (pltindex - 32768) * 4; | |
5448 | Address to | |
5449 | = this->targ_->glink_section()->address() + glinkoff; | |
5450 | Address from | |
7e57d19e AM |
5451 | = (this->stub_address() + cs->second.off_ + 20 |
5452 | + 4 * cs->second.r2save_ | |
9e69ed50 AM |
5453 | + 4 * (ha(off) != 0) |
5454 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) | |
5455 | + 4 * static_chain); | |
5456 | cmp_branch_off = to - from; | |
5457 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); | |
5458 | } | |
5459 | ||
bdab445c | 5460 | p = oview + cs->second.off_; |
34e0882b AM |
5461 | const Symbol* gsym = cs->first.sym_; |
5462 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5463 | { | |
5464 | write_insn<big_endian>(p, ld_11_3 + 0); | |
5465 | p += 4; | |
5466 | write_insn<big_endian>(p, ld_12_3 + 8); | |
5467 | p += 4; | |
5468 | write_insn<big_endian>(p, mr_0_3); | |
5469 | p += 4; | |
5470 | write_insn<big_endian>(p, cmpdi_11_0); | |
5471 | p += 4; | |
5472 | write_insn<big_endian>(p, add_3_12_13); | |
5473 | p += 4; | |
5474 | write_insn<big_endian>(p, beqlr); | |
5475 | p += 4; | |
5476 | write_insn<big_endian>(p, mr_3_0); | |
5477 | p += 4; | |
5478 | if (!cs->second.localentry0_) | |
5479 | { | |
5480 | write_insn<big_endian>(p, mflr_11); | |
5481 | p += 4; | |
5482 | write_insn<big_endian>(p, (std_11_1 | |
5483 | + this->targ_->stk_linker())); | |
5484 | p += 4; | |
5485 | } | |
407aa07c | 5486 | use_fake_dep = thread_safe; |
34e0882b | 5487 | } |
9e69ed50 | 5488 | if (ha(off) != 0) |
ec661b9d | 5489 | { |
7e57d19e AM |
5490 | if (cs->second.r2save_) |
5491 | { | |
5492 | write_insn<big_endian>(p, | |
5493 | std_2_1 + this->targ_->stk_toc()); | |
5494 | p += 4; | |
5495 | } | |
397998fc AM |
5496 | if (plt_load_toc) |
5497 | { | |
5498 | write_insn<big_endian>(p, addis_11_2 + ha(off)); | |
5499 | p += 4; | |
5500 | write_insn<big_endian>(p, ld_12_11 + l(off)); | |
5501 | p += 4; | |
5502 | } | |
5503 | else | |
5504 | { | |
5505 | write_insn<big_endian>(p, addis_12_2 + ha(off)); | |
5506 | p += 4; | |
5507 | write_insn<big_endian>(p, ld_12_12 + l(off)); | |
5508 | p += 4; | |
5509 | } | |
b4f7960d AM |
5510 | if (plt_load_toc |
5511 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5512 | { |
b4f7960d AM |
5513 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
5514 | p += 4; | |
9e69ed50 | 5515 | off = 0; |
ec661b9d | 5516 | } |
b4f7960d AM |
5517 | write_insn<big_endian>(p, mtctr_12); |
5518 | p += 4; | |
5519 | if (plt_load_toc) | |
9e69ed50 | 5520 | { |
b4f7960d AM |
5521 | if (use_fake_dep) |
5522 | { | |
5523 | write_insn<big_endian>(p, xor_2_12_12); | |
5524 | p += 4; | |
5525 | write_insn<big_endian>(p, add_11_11_2); | |
5526 | p += 4; | |
5527 | } | |
5528 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); | |
5529 | p += 4; | |
5530 | if (static_chain) | |
5531 | { | |
5532 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); | |
5533 | p += 4; | |
5534 | } | |
9e69ed50 | 5535 | } |
ec661b9d AM |
5536 | } |
5537 | else | |
5538 | { | |
7e57d19e AM |
5539 | if (cs->second.r2save_) |
5540 | { | |
5541 | write_insn<big_endian>(p, | |
5542 | std_2_1 + this->targ_->stk_toc()); | |
5543 | p += 4; | |
5544 | } | |
b4f7960d AM |
5545 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
5546 | p += 4; | |
5547 | if (plt_load_toc | |
5548 | && ha(off + 8 + 8 * static_chain) != ha(off)) | |
ec661b9d | 5549 | { |
b4f7960d AM |
5550 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
5551 | p += 4; | |
9e69ed50 | 5552 | off = 0; |
ec661b9d | 5553 | } |
b4f7960d AM |
5554 | write_insn<big_endian>(p, mtctr_12); |
5555 | p += 4; | |
5556 | if (plt_load_toc) | |
9e69ed50 | 5557 | { |
b4f7960d AM |
5558 | if (use_fake_dep) |
5559 | { | |
5560 | write_insn<big_endian>(p, xor_11_12_12); | |
5561 | p += 4; | |
5562 | write_insn<big_endian>(p, add_2_2_11); | |
5563 | p += 4; | |
5564 | } | |
5565 | if (static_chain) | |
5566 | { | |
5567 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); | |
5568 | p += 4; | |
5569 | } | |
5570 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); | |
5571 | p += 4; | |
9e69ed50 | 5572 | } |
ec661b9d | 5573 | } |
34e0882b AM |
5574 | if (!cs->second.localentry0_ |
5575 | && this->targ_->is_tls_get_addr_opt(gsym)) | |
5576 | { | |
407aa07c | 5577 | write_insn<big_endian>(p, bctrl); |
34e0882b AM |
5578 | p += 4; |
5579 | write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc()); | |
5580 | p += 4; | |
5581 | write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker()); | |
5582 | p += 4; | |
5583 | write_insn<big_endian>(p, mtlr_11); | |
5584 | p += 4; | |
5585 | write_insn<big_endian>(p, blr); | |
5586 | } | |
5587 | else if (thread_safe && !use_fake_dep) | |
9e69ed50 | 5588 | { |
b4f7960d AM |
5589 | write_insn<big_endian>(p, cmpldi_2_0); |
5590 | p += 4; | |
5591 | write_insn<big_endian>(p, bnectr_p4); | |
5592 | p += 4; | |
9e69ed50 AM |
5593 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
5594 | } | |
5595 | else | |
407aa07c | 5596 | write_insn<big_endian>(p, bctr); |
e5d5f5ed | 5597 | } |
ec661b9d AM |
5598 | } |
5599 | ||
5600 | // Write out long branch stubs. | |
5601 | typename Branch_stub_entries::const_iterator bs; | |
5602 | for (bs = this->long_branch_stubs_.begin(); | |
5603 | bs != this->long_branch_stubs_.end(); | |
5604 | ++bs) | |
5605 | { | |
d49044c7 AM |
5606 | if (bs->first.save_res_) |
5607 | continue; | |
ec661b9d AM |
5608 | p = oview + this->plt_size_ + bs->second; |
5609 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5610 | Address delta = bs->first.dest_ - loc; | |
5611 | if (delta + (1 << 25) < 2 << 25) | |
5612 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
e5d5f5ed | 5613 | else |
cf43a2fe | 5614 | { |
ec661b9d AM |
5615 | Address brlt_addr |
5616 | = this->targ_->find_branch_lookup_table(bs->first.dest_); | |
5617 | gold_assert(brlt_addr != invalid_address); | |
5618 | brlt_addr += this->targ_->brlt_section()->address(); | |
5619 | Address got_addr = got_os_addr + bs->first.toc_base_off_; | |
5620 | Address brltoff = brlt_addr - got_addr; | |
5621 | if (ha(brltoff) == 0) | |
5622 | { | |
b4f7960d | 5623 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4; |
ec661b9d AM |
5624 | } |
5625 | else | |
cf43a2fe | 5626 | { |
397998fc AM |
5627 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4; |
5628 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4; | |
cf43a2fe | 5629 | } |
b4f7960d | 5630 | write_insn<big_endian>(p, mtctr_12), p += 4; |
407aa07c | 5631 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5632 | } |
ec661b9d AM |
5633 | } |
5634 | } | |
5635 | else | |
5636 | { | |
5637 | if (!this->plt_call_stubs_.empty()) | |
5638 | { | |
ec661b9d AM |
5639 | // The address of _GLOBAL_OFFSET_TABLE_. |
5640 | Address g_o_t = invalid_address; | |
5641 | ||
5642 | // Write out plt call stubs. | |
5643 | typename Plt_stub_entries::const_iterator cs; | |
5644 | for (cs = this->plt_call_stubs_.begin(); | |
5645 | cs != this->plt_call_stubs_.end(); | |
5646 | ++cs) | |
cf43a2fe | 5647 | { |
08be3224 AM |
5648 | const Output_data_plt_powerpc<size, big_endian>* plt; |
5649 | Address plt_addr = this->plt_off(cs, &plt); | |
5650 | plt_addr += plt->address(); | |
ec661b9d | 5651 | |
bdab445c | 5652 | p = oview + cs->second.off_; |
34e0882b AM |
5653 | const Symbol* gsym = cs->first.sym_; |
5654 | if (this->targ_->is_tls_get_addr_opt(gsym)) | |
5655 | { | |
5656 | write_insn<big_endian>(p, lwz_11_3 + 0); | |
5657 | p += 4; | |
5658 | write_insn<big_endian>(p, lwz_12_3 + 4); | |
5659 | p += 4; | |
5660 | write_insn<big_endian>(p, mr_0_3); | |
5661 | p += 4; | |
5662 | write_insn<big_endian>(p, cmpwi_11_0); | |
5663 | p += 4; | |
5664 | write_insn<big_endian>(p, add_3_12_2); | |
5665 | p += 4; | |
5666 | write_insn<big_endian>(p, beqlr); | |
5667 | p += 4; | |
5668 | write_insn<big_endian>(p, mr_3_0); | |
5669 | p += 4; | |
5670 | write_insn<big_endian>(p, nop); | |
5671 | p += 4; | |
5672 | } | |
ec661b9d AM |
5673 | if (parameters->options().output_is_position_independent()) |
5674 | { | |
5675 | Address got_addr; | |
5676 | const Powerpc_relobj<size, big_endian>* ppcobj | |
5677 | = (static_cast<const Powerpc_relobj<size, big_endian>*> | |
5678 | (cs->first.object_)); | |
5679 | if (ppcobj != NULL && cs->first.addend_ >= 32768) | |
5680 | { | |
5681 | unsigned int got2 = ppcobj->got2_shndx(); | |
5682 | got_addr = ppcobj->get_output_section_offset(got2); | |
5683 | gold_assert(got_addr != invalid_address); | |
5684 | got_addr += (ppcobj->output_section(got2)->address() | |
5685 | + cs->first.addend_); | |
5686 | } | |
5687 | else | |
5688 | { | |
5689 | if (g_o_t == invalid_address) | |
5690 | { | |
5691 | const Output_data_got_powerpc<size, big_endian>* got | |
5692 | = this->targ_->got_section(); | |
5693 | g_o_t = got->address() + got->g_o_t(); | |
5694 | } | |
5695 | got_addr = g_o_t; | |
5696 | } | |
5697 | ||
9e69ed50 AM |
5698 | Address off = plt_addr - got_addr; |
5699 | if (ha(off) == 0) | |
9e390558 | 5700 | write_insn<big_endian>(p, lwz_11_30 + l(off)); |
ec661b9d AM |
5701 | else |
5702 | { | |
9e390558 AM |
5703 | write_insn<big_endian>(p, addis_11_30 + ha(off)); |
5704 | p += 4; | |
5705 | write_insn<big_endian>(p, lwz_11_11 + l(off)); | |
ec661b9d AM |
5706 | } |
5707 | } | |
5708 | else | |
5709 | { | |
9e390558 AM |
5710 | write_insn<big_endian>(p, lis_11 + ha(plt_addr)); |
5711 | p += 4; | |
5712 | write_insn<big_endian>(p, lwz_11_11 + l(plt_addr)); | |
ec661b9d | 5713 | } |
9e390558 AM |
5714 | p += 4; |
5715 | write_insn<big_endian>(p, mtctr_11); | |
5716 | p += 4; | |
407aa07c | 5717 | write_insn<big_endian>(p, bctr); |
ec661b9d AM |
5718 | } |
5719 | } | |
5720 | ||
5721 | // Write out long branch stubs. | |
5722 | typename Branch_stub_entries::const_iterator bs; | |
5723 | for (bs = this->long_branch_stubs_.begin(); | |
5724 | bs != this->long_branch_stubs_.end(); | |
5725 | ++bs) | |
5726 | { | |
d49044c7 AM |
5727 | if (bs->first.save_res_) |
5728 | continue; | |
ec661b9d AM |
5729 | p = oview + this->plt_size_ + bs->second; |
5730 | Address loc = this->stub_address() + this->plt_size_ + bs->second; | |
5731 | Address delta = bs->first.dest_ - loc; | |
5732 | if (delta + (1 << 25) < 2 << 25) | |
5733 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); | |
5734 | else if (!parameters->options().output_is_position_independent()) | |
5735 | { | |
9e390558 AM |
5736 | write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_)); |
5737 | p += 4; | |
5738 | write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_)); | |
ec661b9d AM |
5739 | } |
5740 | else | |
5741 | { | |
5742 | delta -= 8; | |
9e390558 AM |
5743 | write_insn<big_endian>(p, mflr_0); |
5744 | p += 4; | |
5745 | write_insn<big_endian>(p, bcl_20_31); | |
5746 | p += 4; | |
5747 | write_insn<big_endian>(p, mflr_12); | |
5748 | p += 4; | |
5749 | write_insn<big_endian>(p, addis_12_12 + ha(delta)); | |
5750 | p += 4; | |
5751 | write_insn<big_endian>(p, addi_12_12 + l(delta)); | |
5752 | p += 4; | |
5753 | write_insn<big_endian>(p, mtlr_0); | |
cf43a2fe | 5754 | } |
9e390558 AM |
5755 | p += 4; |
5756 | write_insn<big_endian>(p, mtctr_12); | |
5757 | p += 4; | |
407aa07c | 5758 | write_insn<big_endian>(p, bctr); |
cf43a2fe | 5759 | } |
ec661b9d | 5760 | } |
d49044c7 AM |
5761 | if (this->need_save_res_) |
5762 | { | |
5763 | p = oview + this->plt_size_ + this->branch_size_; | |
5764 | memcpy (p, this->targ_->savres_section()->contents(), | |
5765 | this->targ_->savres_section()->data_size()); | |
5766 | } | |
ec661b9d AM |
5767 | } |
5768 | ||
5769 | // Write out .glink. | |
5770 | ||
5771 | template<int size, bool big_endian> | |
5772 | void | |
5773 | Output_data_glink<size, big_endian>::do_write(Output_file* of) | |
5774 | { | |
5775 | const section_size_type off = this->offset(); | |
5776 | const section_size_type oview_size = | |
5777 | convert_to_section_size_type(this->data_size()); | |
5778 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
5779 | unsigned char* p; | |
5780 | ||
5781 | // The base address of the .plt section. | |
5782 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
5783 | Address plt_base = this->targ_->plt_section()->address(); | |
cf43a2fe | 5784 | |
ec661b9d AM |
5785 | if (size == 64) |
5786 | { | |
9055360d | 5787 | if (this->end_branch_table_ != 0) |
b4f7960d | 5788 | { |
9055360d AM |
5789 | // Write pltresolve stub. |
5790 | p = oview; | |
5791 | Address after_bcl = this->address() + 16; | |
5792 | Address pltoff = plt_base - after_bcl; | |
5793 | ||
5794 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; | |
cf43a2fe | 5795 | |
b4f7960d | 5796 | if (this->targ_->abiversion() < 2) |
cf43a2fe | 5797 | { |
9055360d AM |
5798 | write_insn<big_endian>(p, mflr_12), p += 4; |
5799 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5800 | write_insn<big_endian>(p, mflr_11), p += 4; | |
5801 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; | |
5802 | write_insn<big_endian>(p, mtlr_12), p += 4; | |
5803 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5804 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5805 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; | |
5806 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5807 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; | |
5808 | } | |
5809 | else | |
5810 | { | |
5811 | write_insn<big_endian>(p, mflr_0), p += 4; | |
5812 | write_insn<big_endian>(p, bcl_20_31), p += 4; | |
5813 | write_insn<big_endian>(p, mflr_11), p += 4; | |
7ee7ff70 | 5814 | write_insn<big_endian>(p, std_2_1 + 24), p += 4; |
9055360d AM |
5815 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
5816 | write_insn<big_endian>(p, mtlr_0), p += 4; | |
5817 | write_insn<big_endian>(p, sub_12_12_11), p += 4; | |
5818 | write_insn<big_endian>(p, add_11_2_11), p += 4; | |
5819 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; | |
5820 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; | |
5821 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; | |
5822 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
5823 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; | |
5824 | } | |
407aa07c | 5825 | write_insn<big_endian>(p, bctr), p += 4; |
9e390558 | 5826 | gold_assert(p == oview + this->pltresolve_size()); |
9055360d AM |
5827 | |
5828 | // Write lazy link call stubs. | |
5829 | uint32_t indx = 0; | |
5830 | while (p < oview + this->end_branch_table_) | |
5831 | { | |
5832 | if (this->targ_->abiversion() < 2) | |
b4f7960d | 5833 | { |
9055360d AM |
5834 | if (indx < 0x8000) |
5835 | { | |
5836 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; | |
5837 | } | |
5838 | else | |
5839 | { | |
bbec1a5d | 5840 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
9055360d AM |
5841 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
5842 | } | |
b4f7960d | 5843 | } |
9055360d AM |
5844 | uint32_t branch_off = 8 - (p - oview); |
5845 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; | |
5846 | indx++; | |
cf43a2fe | 5847 | } |
9055360d AM |
5848 | } |
5849 | ||
5850 | Address plt_base = this->targ_->plt_section()->address(); | |
5851 | Address iplt_base = invalid_address; | |
9e390558 | 5852 | unsigned int global_entry_off = this->global_entry_off(); |
9055360d AM |
5853 | Address global_entry_base = this->address() + global_entry_off; |
5854 | typename Global_entry_stub_entries::const_iterator ge; | |
5855 | for (ge = this->global_entry_stubs_.begin(); | |
5856 | ge != this->global_entry_stubs_.end(); | |
5857 | ++ge) | |
5858 | { | |
5859 | p = oview + global_entry_off + ge->second; | |
5860 | Address plt_addr = ge->first->plt_offset(); | |
5861 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC | |
5862 | && ge->first->can_use_relative_reloc(false)) | |
5863 | { | |
5864 | if (iplt_base == invalid_address) | |
5865 | iplt_base = this->targ_->iplt_section()->address(); | |
5866 | plt_addr += iplt_base; | |
5867 | } | |
5868 | else | |
5869 | plt_addr += plt_base; | |
5870 | Address my_addr = global_entry_base + ge->second; | |
5871 | Address off = plt_addr - my_addr; | |
5872 | ||
5873 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) | |
5874 | gold_error(_("%s: linkage table error against `%s'"), | |
5875 | ge->first->object()->name().c_str(), | |
5876 | ge->first->demangled_name().c_str()); | |
5877 | ||
5878 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; | |
5879 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; | |
5880 | write_insn<big_endian>(p, mtctr_12), p += 4; | |
407aa07c | 5881 | write_insn<big_endian>(p, bctr); |
cf43a2fe AM |
5882 | } |
5883 | } | |
5884 | else | |
5885 | { | |
ec661b9d AM |
5886 | const Output_data_got_powerpc<size, big_endian>* got |
5887 | = this->targ_->got_section(); | |
dd93cd0a AM |
5888 | // The address of _GLOBAL_OFFSET_TABLE_. |
5889 | Address g_o_t = got->address() + got->g_o_t(); | |
c9269dff | 5890 | |
cf43a2fe | 5891 | // Write out pltresolve branch table. |
ec661b9d | 5892 | p = oview; |
9e390558 | 5893 | unsigned int the_end = oview_size - this->pltresolve_size(); |
c9269dff | 5894 | unsigned char* end_p = oview + the_end; |
cf43a2fe AM |
5895 | while (p < end_p - 8 * 4) |
5896 | write_insn<big_endian>(p, b + end_p - p), p += 4; | |
5897 | while (p < end_p) | |
5898 | write_insn<big_endian>(p, nop), p += 4; | |
42cacb20 | 5899 | |
cf43a2fe | 5900 | // Write out pltresolve call stub. |
9e390558 | 5901 | end_p = oview + oview_size; |
cf43a2fe | 5902 | if (parameters->options().output_is_position_independent()) |
42cacb20 | 5903 | { |
ec661b9d | 5904 | Address res0_off = 0; |
dd93cd0a AM |
5905 | Address after_bcl_off = the_end + 12; |
5906 | Address bcl_res0 = after_bcl_off - res0_off; | |
cf43a2fe | 5907 | |
9e390558 AM |
5908 | write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0)); |
5909 | p += 4; | |
5910 | write_insn<big_endian>(p, mflr_0); | |
5911 | p += 4; | |
5912 | write_insn<big_endian>(p, bcl_20_31); | |
5913 | p += 4; | |
5914 | write_insn<big_endian>(p, addi_11_11 + l(bcl_res0)); | |
5915 | p += 4; | |
5916 | write_insn<big_endian>(p, mflr_12); | |
5917 | p += 4; | |
5918 | write_insn<big_endian>(p, mtlr_0); | |
5919 | p += 4; | |
5920 | write_insn<big_endian>(p, sub_11_11_12); | |
5921 | p += 4; | |
cf43a2fe | 5922 | |
dd93cd0a | 5923 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
cf43a2fe | 5924 | |
9e390558 AM |
5925 | write_insn<big_endian>(p, addis_12_12 + ha(got_bcl)); |
5926 | p += 4; | |
cf43a2fe AM |
5927 | if (ha(got_bcl) == ha(got_bcl + 4)) |
5928 | { | |
9e390558 AM |
5929 | write_insn<big_endian>(p, lwz_0_12 + l(got_bcl)); |
5930 | p += 4; | |
5931 | write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4)); | |
cf43a2fe AM |
5932 | } |
5933 | else | |
5934 | { | |
9e390558 AM |
5935 | write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl)); |
5936 | p += 4; | |
5937 | write_insn<big_endian>(p, lwz_12_12 + 4); | |
cf43a2fe | 5938 | } |
9e390558 AM |
5939 | p += 4; |
5940 | write_insn<big_endian>(p, mtctr_0); | |
5941 | p += 4; | |
5942 | write_insn<big_endian>(p, add_0_11_11); | |
5943 | p += 4; | |
5944 | write_insn<big_endian>(p, add_11_0_11); | |
42cacb20 | 5945 | } |
cf43a2fe | 5946 | else |
42cacb20 | 5947 | { |
ec661b9d | 5948 | Address res0 = this->address(); |
cf43a2fe | 5949 | |
9e390558 AM |
5950 | write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4)); |
5951 | p += 4; | |
5952 | write_insn<big_endian>(p, addis_11_11 + ha(-res0)); | |
5953 | p += 4; | |
cf43a2fe | 5954 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5955 | write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4)); |
cf43a2fe | 5956 | else |
9e390558 AM |
5957 | write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4)); |
5958 | p += 4; | |
5959 | write_insn<big_endian>(p, addi_11_11 + l(-res0)); | |
5960 | p += 4; | |
5961 | write_insn<big_endian>(p, mtctr_0); | |
5962 | p += 4; | |
5963 | write_insn<big_endian>(p, add_0_11_11); | |
5964 | p += 4; | |
cf43a2fe | 5965 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
9e390558 | 5966 | write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8)); |
cf43a2fe | 5967 | else |
9e390558 AM |
5968 | write_insn<big_endian>(p, lwz_12_12 + 4); |
5969 | p += 4; | |
5970 | write_insn<big_endian>(p, add_11_0_11); | |
5971 | } | |
5972 | p += 4; | |
407aa07c AM |
5973 | write_insn<big_endian>(p, bctr); |
5974 | p += 4; | |
9e390558 AM |
5975 | while (p < end_p) |
5976 | { | |
5977 | write_insn<big_endian>(p, nop); | |
5978 | p += 4; | |
42cacb20 DE |
5979 | } |
5980 | } | |
5981 | ||
cf43a2fe AM |
5982 | of->write_output_view(off, oview_size, oview); |
5983 | } | |
5984 | ||
f3a0ed29 AM |
5985 | |
5986 | // A class to handle linker generated save/restore functions. | |
5987 | ||
5988 | template<int size, bool big_endian> | |
5989 | class Output_data_save_res : public Output_section_data_build | |
5990 | { | |
5991 | public: | |
5992 | Output_data_save_res(Symbol_table* symtab); | |
5993 | ||
d49044c7 AM |
5994 | const unsigned char* |
5995 | contents() const | |
5996 | { | |
5997 | return contents_; | |
5998 | } | |
5999 | ||
f3a0ed29 AM |
6000 | protected: |
6001 | // Write to a map file. | |
6002 | void | |
6003 | do_print_to_mapfile(Mapfile* mapfile) const | |
6004 | { mapfile->print_output_data(this, _("** save/restore")); } | |
6005 | ||
6006 | void | |
6007 | do_write(Output_file*); | |
6008 | ||
6009 | private: | |
6010 | // The maximum size of save/restore contents. | |
6011 | static const unsigned int savres_max = 218*4; | |
6012 | ||
6013 | void | |
6014 | savres_define(Symbol_table* symtab, | |
6015 | const char *name, | |
6016 | unsigned int lo, unsigned int hi, | |
6017 | unsigned char* write_ent(unsigned char*, int), | |
6018 | unsigned char* write_tail(unsigned char*, int)); | |
6019 | ||
6020 | unsigned char *contents_; | |
6021 | }; | |
6022 | ||
6023 | template<bool big_endian> | |
6024 | static unsigned char* | |
6025 | savegpr0(unsigned char* p, int r) | |
6026 | { | |
6027 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6028 | write_insn<big_endian>(p, insn); | |
6029 | return p + 4; | |
6030 | } | |
6031 | ||
6032 | template<bool big_endian> | |
6033 | static unsigned char* | |
6034 | savegpr0_tail(unsigned char* p, int r) | |
6035 | { | |
6036 | p = savegpr0<big_endian>(p, r); | |
6037 | uint32_t insn = std_0_1 + 16; | |
6038 | write_insn<big_endian>(p, insn); | |
6039 | p = p + 4; | |
6040 | write_insn<big_endian>(p, blr); | |
6041 | return p + 4; | |
6042 | } | |
6043 | ||
6044 | template<bool big_endian> | |
62fe925a | 6045 | static unsigned char* |
f3a0ed29 AM |
6046 | restgpr0(unsigned char* p, int r) |
6047 | { | |
6048 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6049 | write_insn<big_endian>(p, insn); | |
6050 | return p + 4; | |
6051 | } | |
6052 | ||
6053 | template<bool big_endian> | |
62fe925a | 6054 | static unsigned char* |
f3a0ed29 AM |
6055 | restgpr0_tail(unsigned char* p, int r) |
6056 | { | |
6057 | uint32_t insn = ld_0_1 + 16; | |
6058 | write_insn<big_endian>(p, insn); | |
6059 | p = p + 4; | |
6060 | p = restgpr0<big_endian>(p, r); | |
6061 | write_insn<big_endian>(p, mtlr_0); | |
6062 | p = p + 4; | |
6063 | if (r == 29) | |
6064 | { | |
6065 | p = restgpr0<big_endian>(p, 30); | |
6066 | p = restgpr0<big_endian>(p, 31); | |
6067 | } | |
6068 | write_insn<big_endian>(p, blr); | |
6069 | return p + 4; | |
6070 | } | |
6071 | ||
6072 | template<bool big_endian> | |
62fe925a | 6073 | static unsigned char* |
f3a0ed29 AM |
6074 | savegpr1(unsigned char* p, int r) |
6075 | { | |
6076 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6077 | write_insn<big_endian>(p, insn); | |
6078 | return p + 4; | |
6079 | } | |
6080 | ||
6081 | template<bool big_endian> | |
62fe925a | 6082 | static unsigned char* |
f3a0ed29 AM |
6083 | savegpr1_tail(unsigned char* p, int r) |
6084 | { | |
6085 | p = savegpr1<big_endian>(p, r); | |
6086 | write_insn<big_endian>(p, blr); | |
6087 | return p + 4; | |
6088 | } | |
6089 | ||
6090 | template<bool big_endian> | |
62fe925a | 6091 | static unsigned char* |
f3a0ed29 AM |
6092 | restgpr1(unsigned char* p, int r) |
6093 | { | |
6094 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6095 | write_insn<big_endian>(p, insn); | |
6096 | return p + 4; | |
6097 | } | |
6098 | ||
6099 | template<bool big_endian> | |
62fe925a | 6100 | static unsigned char* |
f3a0ed29 AM |
6101 | restgpr1_tail(unsigned char* p, int r) |
6102 | { | |
6103 | p = restgpr1<big_endian>(p, r); | |
6104 | write_insn<big_endian>(p, blr); | |
6105 | return p + 4; | |
6106 | } | |
6107 | ||
6108 | template<bool big_endian> | |
62fe925a | 6109 | static unsigned char* |
f3a0ed29 AM |
6110 | savefpr(unsigned char* p, int r) |
6111 | { | |
6112 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6113 | write_insn<big_endian>(p, insn); | |
6114 | return p + 4; | |
6115 | } | |
6116 | ||
6117 | template<bool big_endian> | |
62fe925a | 6118 | static unsigned char* |
f3a0ed29 AM |
6119 | savefpr0_tail(unsigned char* p, int r) |
6120 | { | |
6121 | p = savefpr<big_endian>(p, r); | |
6122 | write_insn<big_endian>(p, std_0_1 + 16); | |
6123 | p = p + 4; | |
6124 | write_insn<big_endian>(p, blr); | |
6125 | return p + 4; | |
6126 | } | |
6127 | ||
6128 | template<bool big_endian> | |
62fe925a | 6129 | static unsigned char* |
f3a0ed29 AM |
6130 | restfpr(unsigned char* p, int r) |
6131 | { | |
6132 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; | |
6133 | write_insn<big_endian>(p, insn); | |
6134 | return p + 4; | |
6135 | } | |
6136 | ||
6137 | template<bool big_endian> | |
62fe925a | 6138 | static unsigned char* |
f3a0ed29 AM |
6139 | restfpr0_tail(unsigned char* p, int r) |
6140 | { | |
6141 | write_insn<big_endian>(p, ld_0_1 + 16); | |
6142 | p = p + 4; | |
6143 | p = restfpr<big_endian>(p, r); | |
6144 | write_insn<big_endian>(p, mtlr_0); | |
6145 | p = p + 4; | |
6146 | if (r == 29) | |
6147 | { | |
6148 | p = restfpr<big_endian>(p, 30); | |
6149 | p = restfpr<big_endian>(p, 31); | |
6150 | } | |
6151 | write_insn<big_endian>(p, blr); | |
6152 | return p + 4; | |
6153 | } | |
6154 | ||
6155 | template<bool big_endian> | |
62fe925a | 6156 | static unsigned char* |
f3a0ed29 AM |
6157 | savefpr1_tail(unsigned char* p, int r) |
6158 | { | |
6159 | p = savefpr<big_endian>(p, r); | |
6160 | write_insn<big_endian>(p, blr); | |
6161 | return p + 4; | |
6162 | } | |
6163 | ||
6164 | template<bool big_endian> | |
62fe925a | 6165 | static unsigned char* |
f3a0ed29 AM |
6166 | restfpr1_tail(unsigned char* p, int r) |
6167 | { | |
6168 | p = restfpr<big_endian>(p, r); | |
6169 | write_insn<big_endian>(p, blr); | |
6170 | return p + 4; | |
6171 | } | |
6172 | ||
6173 | template<bool big_endian> | |
62fe925a | 6174 | static unsigned char* |
f3a0ed29 AM |
6175 | savevr(unsigned char* p, int r) |
6176 | { | |
6177 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
6178 | write_insn<big_endian>(p, insn); | |
6179 | p = p + 4; | |
6180 | insn = stvx_0_12_0 + (r << 21); | |
6181 | write_insn<big_endian>(p, insn); | |
6182 | return p + 4; | |
6183 | } | |
6184 | ||
6185 | template<bool big_endian> | |
62fe925a | 6186 | static unsigned char* |
f3a0ed29 AM |
6187 | savevr_tail(unsigned char* p, int r) |
6188 | { | |
6189 | p = savevr<big_endian>(p, r); | |
6190 | write_insn<big_endian>(p, blr); | |
6191 | return p + 4; | |
6192 | } | |
6193 | ||
6194 | template<bool big_endian> | |
62fe925a | 6195 | static unsigned char* |
f3a0ed29 AM |
6196 | restvr(unsigned char* p, int r) |
6197 | { | |
6198 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; | |
6199 | write_insn<big_endian>(p, insn); | |
6200 | p = p + 4; | |
6201 | insn = lvx_0_12_0 + (r << 21); | |
6202 | write_insn<big_endian>(p, insn); | |
6203 | return p + 4; | |
6204 | } | |
6205 | ||
6206 | template<bool big_endian> | |
62fe925a | 6207 | static unsigned char* |
f3a0ed29 AM |
6208 | restvr_tail(unsigned char* p, int r) |
6209 | { | |
6210 | p = restvr<big_endian>(p, r); | |
6211 | write_insn<big_endian>(p, blr); | |
6212 | return p + 4; | |
6213 | } | |
6214 | ||
6215 | ||
6216 | template<int size, bool big_endian> | |
6217 | Output_data_save_res<size, big_endian>::Output_data_save_res( | |
6218 | Symbol_table* symtab) | |
6219 | : Output_section_data_build(4), | |
6220 | contents_(NULL) | |
6221 | { | |
6222 | this->savres_define(symtab, | |
6223 | "_savegpr0_", 14, 31, | |
6224 | savegpr0<big_endian>, savegpr0_tail<big_endian>); | |
6225 | this->savres_define(symtab, | |
6226 | "_restgpr0_", 14, 29, | |
6227 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6228 | this->savres_define(symtab, | |
6229 | "_restgpr0_", 30, 31, | |
6230 | restgpr0<big_endian>, restgpr0_tail<big_endian>); | |
6231 | this->savres_define(symtab, | |
6232 | "_savegpr1_", 14, 31, | |
6233 | savegpr1<big_endian>, savegpr1_tail<big_endian>); | |
6234 | this->savres_define(symtab, | |
6235 | "_restgpr1_", 14, 31, | |
6236 | restgpr1<big_endian>, restgpr1_tail<big_endian>); | |
6237 | this->savres_define(symtab, | |
6238 | "_savefpr_", 14, 31, | |
6239 | savefpr<big_endian>, savefpr0_tail<big_endian>); | |
6240 | this->savres_define(symtab, | |
6241 | "_restfpr_", 14, 29, | |
6242 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6243 | this->savres_define(symtab, | |
6244 | "_restfpr_", 30, 31, | |
6245 | restfpr<big_endian>, restfpr0_tail<big_endian>); | |
6246 | this->savres_define(symtab, | |
6247 | "._savef", 14, 31, | |
6248 | savefpr<big_endian>, savefpr1_tail<big_endian>); | |
6249 | this->savres_define(symtab, | |
6250 | "._restf", 14, 31, | |
6251 | restfpr<big_endian>, restfpr1_tail<big_endian>); | |
6252 | this->savres_define(symtab, | |
6253 | "_savevr_", 20, 31, | |
6254 | savevr<big_endian>, savevr_tail<big_endian>); | |
6255 | this->savres_define(symtab, | |
6256 | "_restvr_", 20, 31, | |
6257 | restvr<big_endian>, restvr_tail<big_endian>); | |
6258 | } | |
6259 | ||
6260 | template<int size, bool big_endian> | |
6261 | void | |
6262 | Output_data_save_res<size, big_endian>::savres_define( | |
6263 | Symbol_table* symtab, | |
6264 | const char *name, | |
6265 | unsigned int lo, unsigned int hi, | |
6266 | unsigned char* write_ent(unsigned char*, int), | |
6267 | unsigned char* write_tail(unsigned char*, int)) | |
6268 | { | |
6269 | size_t len = strlen(name); | |
6270 | bool writing = false; | |
6271 | char sym[16]; | |
6272 | ||
6273 | memcpy(sym, name, len); | |
6274 | sym[len + 2] = 0; | |
6275 | ||
6276 | for (unsigned int i = lo; i <= hi; i++) | |
6277 | { | |
6278 | sym[len + 0] = i / 10 + '0'; | |
6279 | sym[len + 1] = i % 10 + '0'; | |
6280 | Symbol* gsym = symtab->lookup(sym); | |
6281 | bool refd = gsym != NULL && gsym->is_undefined(); | |
6282 | writing = writing || refd; | |
6283 | if (writing) | |
6284 | { | |
6285 | if (this->contents_ == NULL) | |
6286 | this->contents_ = new unsigned char[this->savres_max]; | |
6287 | ||
ec661b9d | 6288 | section_size_type value = this->current_data_size(); |
f3a0ed29 AM |
6289 | unsigned char* p = this->contents_ + value; |
6290 | if (i != hi) | |
6291 | p = write_ent(p, i); | |
6292 | else | |
6293 | p = write_tail(p, i); | |
ec661b9d | 6294 | section_size_type cur_size = p - this->contents_; |
f3a0ed29 AM |
6295 | this->set_current_data_size(cur_size); |
6296 | if (refd) | |
6297 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, | |
6298 | this, value, cur_size - value, | |
6299 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, | |
6300 | elfcpp::STV_HIDDEN, 0, false, false); | |
6301 | } | |
6302 | } | |
6303 | } | |
6304 | ||
6305 | // Write out save/restore. | |
6306 | ||
6307 | template<int size, bool big_endian> | |
6308 | void | |
6309 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) | |
6310 | { | |
ec661b9d | 6311 | const section_size_type off = this->offset(); |
f3a0ed29 AM |
6312 | const section_size_type oview_size = |
6313 | convert_to_section_size_type(this->data_size()); | |
6314 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
6315 | memcpy(oview, this->contents_, oview_size); | |
6316 | of->write_output_view(off, oview_size, oview); | |
6317 | } | |
6318 | ||
6319 | ||
cf43a2fe | 6320 | // Create the glink section. |
42cacb20 | 6321 | |
cf43a2fe AM |
6322 | template<int size, bool big_endian> |
6323 | void | |
6324 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) | |
6325 | { | |
6326 | if (this->glink_ == NULL) | |
6327 | { | |
6328 | this->glink_ = new Output_data_glink<size, big_endian>(this); | |
9d5781f8 | 6329 | this->glink_->add_eh_frame(layout); |
cf43a2fe AM |
6330 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
6331 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
6332 | this->glink_, ORDER_TEXT, false); | |
6333 | } | |
42cacb20 DE |
6334 | } |
6335 | ||
6336 | // Create a PLT entry for a global symbol. | |
6337 | ||
6338 | template<int size, bool big_endian> | |
6339 | void | |
ec661b9d AM |
6340 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
6341 | Layout* layout, | |
6342 | Symbol* gsym) | |
42cacb20 | 6343 | { |
e5d5f5ed AM |
6344 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
6345 | && gsym->can_use_relative_reloc(false)) | |
6346 | { | |
6347 | if (this->iplt_ == NULL) | |
40b469d7 | 6348 | this->make_iplt_section(symtab, layout); |
03e25981 | 6349 | this->iplt_->add_ifunc_entry(gsym); |
e5d5f5ed AM |
6350 | } |
6351 | else | |
6352 | { | |
6353 | if (this->plt_ == NULL) | |
40b469d7 | 6354 | this->make_plt_section(symtab, layout); |
03e25981 | 6355 | this->plt_->add_entry(gsym); |
e5d5f5ed | 6356 | } |
e5d5f5ed | 6357 | } |
42cacb20 | 6358 | |
2d7ad24e AM |
6359 | // Make a PLT entry for a local symbol. |
6360 | ||
6361 | template<int size, bool big_endian> | |
6362 | void | |
6363 | Target_powerpc<size, big_endian>::make_local_plt_entry( | |
6364 | Layout* layout, | |
6365 | Sized_relobj_file<size, big_endian>* relobj, | |
6366 | unsigned int r_sym) | |
6367 | { | |
6368 | if (this->lplt_ == NULL) | |
6369 | this->make_lplt_section(layout); | |
6370 | this->lplt_->add_local_entry(relobj, r_sym); | |
6371 | } | |
6372 | ||
e5d5f5ed | 6373 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
612a8d3d | 6374 | |
e5d5f5ed AM |
6375 | template<int size, bool big_endian> |
6376 | void | |
6377 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( | |
40b469d7 | 6378 | Symbol_table* symtab, |
e5d5f5ed | 6379 | Layout* layout, |
ec661b9d AM |
6380 | Sized_relobj_file<size, big_endian>* relobj, |
6381 | unsigned int r_sym) | |
e5d5f5ed AM |
6382 | { |
6383 | if (this->iplt_ == NULL) | |
40b469d7 | 6384 | this->make_iplt_section(symtab, layout); |
03e25981 | 6385 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
42cacb20 DE |
6386 | } |
6387 | ||
0e70b911 CC |
6388 | // Return the number of entries in the PLT. |
6389 | ||
6390 | template<int size, bool big_endian> | |
6391 | unsigned int | |
6392 | Target_powerpc<size, big_endian>::plt_entry_count() const | |
6393 | { | |
6394 | if (this->plt_ == NULL) | |
6395 | return 0; | |
b3ccdeb5 | 6396 | return this->plt_->entry_count(); |
0e70b911 CC |
6397 | } |
6398 | ||
dd93cd0a | 6399 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
42cacb20 DE |
6400 | |
6401 | template<int size, bool big_endian> | |
6402 | unsigned int | |
dd93cd0a | 6403 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
6fa2a40b CC |
6404 | Symbol_table* symtab, |
6405 | Layout* layout, | |
6406 | Sized_relobj_file<size, big_endian>* object) | |
42cacb20 | 6407 | { |
dd93cd0a | 6408 | if (this->tlsld_got_offset_ == -1U) |
42cacb20 DE |
6409 | { |
6410 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
6411 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
dd93cd0a AM |
6412 | Output_data_got_powerpc<size, big_endian>* got |
6413 | = this->got_section(symtab, layout); | |
6414 | unsigned int got_offset = got->add_constant_pair(0, 0); | |
42cacb20 DE |
6415 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
6416 | got_offset, 0); | |
dd93cd0a | 6417 | this->tlsld_got_offset_ = got_offset; |
42cacb20 | 6418 | } |
dd93cd0a | 6419 | return this->tlsld_got_offset_; |
42cacb20 DE |
6420 | } |
6421 | ||
95a2c8d6 RS |
6422 | // Get the Reference_flags for a particular relocation. |
6423 | ||
6424 | template<int size, bool big_endian> | |
6425 | int | |
88b8e639 AM |
6426 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
6427 | unsigned int r_type, | |
6428 | const Target_powerpc* target) | |
95a2c8d6 | 6429 | { |
88b8e639 AM |
6430 | int ref = 0; |
6431 | ||
95a2c8d6 RS |
6432 | switch (r_type) |
6433 | { | |
6434 | case elfcpp::R_POWERPC_NONE: | |
6435 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6436 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
6437 | case elfcpp::R_PPC64_TOC: | |
6438 | // No symbol reference. | |
88b8e639 | 6439 | break; |
95a2c8d6 | 6440 | |
dd93cd0a AM |
6441 | case elfcpp::R_PPC64_ADDR64: |
6442 | case elfcpp::R_PPC64_UADDR64: | |
6443 | case elfcpp::R_POWERPC_ADDR32: | |
6444 | case elfcpp::R_POWERPC_UADDR32: | |
95a2c8d6 | 6445 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 6446 | case elfcpp::R_POWERPC_UADDR16: |
95a2c8d6 RS |
6447 | case elfcpp::R_POWERPC_ADDR16_LO: |
6448 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6449 | case elfcpp::R_POWERPC_ADDR16_HA: | |
88b8e639 AM |
6450 | ref = Symbol::ABSOLUTE_REF; |
6451 | break; | |
95a2c8d6 | 6452 | |
dd93cd0a AM |
6453 | case elfcpp::R_POWERPC_ADDR24: |
6454 | case elfcpp::R_POWERPC_ADDR14: | |
6455 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6456 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
88b8e639 AM |
6457 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
6458 | break; | |
dd93cd0a | 6459 | |
e5d5f5ed | 6460 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 6461 | case elfcpp::R_POWERPC_REL32: |
95a2c8d6 | 6462 | case elfcpp::R_PPC_LOCAL24PC: |
6ce78956 AM |
6463 | case elfcpp::R_POWERPC_REL16: |
6464 | case elfcpp::R_POWERPC_REL16_LO: | |
6465 | case elfcpp::R_POWERPC_REL16_HI: | |
6466 | case elfcpp::R_POWERPC_REL16_HA: | |
88b8e639 AM |
6467 | ref = Symbol::RELATIVE_REF; |
6468 | break; | |
95a2c8d6 | 6469 | |
dd93cd0a | 6470 | case elfcpp::R_POWERPC_REL24: |
95a2c8d6 | 6471 | case elfcpp::R_PPC_PLTREL24: |
dd93cd0a AM |
6472 | case elfcpp::R_POWERPC_REL14: |
6473 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6474 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
88b8e639 AM |
6475 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
6476 | break; | |
95a2c8d6 RS |
6477 | |
6478 | case elfcpp::R_POWERPC_GOT16: | |
6479 | case elfcpp::R_POWERPC_GOT16_LO: | |
6480 | case elfcpp::R_POWERPC_GOT16_HI: | |
6481 | case elfcpp::R_POWERPC_GOT16_HA: | |
e5d5f5ed AM |
6482 | case elfcpp::R_PPC64_GOT16_DS: |
6483 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
95a2c8d6 RS |
6484 | case elfcpp::R_PPC64_TOC16: |
6485 | case elfcpp::R_PPC64_TOC16_LO: | |
6486 | case elfcpp::R_PPC64_TOC16_HI: | |
6487 | case elfcpp::R_PPC64_TOC16_HA: | |
6488 | case elfcpp::R_PPC64_TOC16_DS: | |
6489 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
08be3224 AM |
6490 | case elfcpp::R_POWERPC_PLT16_LO: |
6491 | case elfcpp::R_POWERPC_PLT16_HI: | |
6492 | case elfcpp::R_POWERPC_PLT16_HA: | |
6493 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
32d849b3 | 6494 | ref = Symbol::RELATIVE_REF; |
88b8e639 | 6495 | break; |
95a2c8d6 RS |
6496 | |
6497 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
6498 | case elfcpp::R_POWERPC_TLS: | |
88b8e639 AM |
6499 | ref = Symbol::TLS_REF; |
6500 | break; | |
95a2c8d6 RS |
6501 | |
6502 | case elfcpp::R_POWERPC_COPY: | |
6503 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6504 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6505 | case elfcpp::R_POWERPC_RELATIVE: | |
6506 | case elfcpp::R_POWERPC_DTPMOD: | |
6507 | default: | |
6508 | // Not expected. We will give an error later. | |
88b8e639 | 6509 | break; |
95a2c8d6 | 6510 | } |
88b8e639 AM |
6511 | |
6512 | if (size == 64 && target->abiversion() < 2) | |
6513 | ref |= Symbol::FUNC_DESC_ABI; | |
6514 | return ref; | |
95a2c8d6 RS |
6515 | } |
6516 | ||
42cacb20 DE |
6517 | // Report an unsupported relocation against a local symbol. |
6518 | ||
6519 | template<int size, bool big_endian> | |
6520 | void | |
6521 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( | |
d83ce4e3 AM |
6522 | Sized_relobj_file<size, big_endian>* object, |
6523 | unsigned int r_type) | |
42cacb20 DE |
6524 | { |
6525 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
6526 | object->name().c_str(), r_type); | |
6527 | } | |
6528 | ||
6529 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
6530 | // dynamic linker does not support it, issue an error. | |
6531 | ||
6532 | template<int size, bool big_endian> | |
6533 | void | |
6534 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
6535 | unsigned int r_type) | |
6536 | { | |
6537 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); | |
6538 | ||
6539 | // These are the relocation types supported by glibc for both 32-bit | |
6540 | // and 64-bit powerpc. | |
6541 | switch (r_type) | |
6542 | { | |
3ea0a085 | 6543 | case elfcpp::R_POWERPC_NONE: |
42cacb20 DE |
6544 | case elfcpp::R_POWERPC_RELATIVE: |
6545 | case elfcpp::R_POWERPC_GLOB_DAT: | |
6546 | case elfcpp::R_POWERPC_DTPMOD: | |
6547 | case elfcpp::R_POWERPC_DTPREL: | |
6548 | case elfcpp::R_POWERPC_TPREL: | |
6549 | case elfcpp::R_POWERPC_JMP_SLOT: | |
6550 | case elfcpp::R_POWERPC_COPY: | |
3ea0a085 | 6551 | case elfcpp::R_POWERPC_IRELATIVE: |
42cacb20 | 6552 | case elfcpp::R_POWERPC_ADDR32: |
3ea0a085 | 6553 | case elfcpp::R_POWERPC_UADDR32: |
42cacb20 | 6554 | case elfcpp::R_POWERPC_ADDR24: |
3ea0a085 AM |
6555 | case elfcpp::R_POWERPC_ADDR16: |
6556 | case elfcpp::R_POWERPC_UADDR16: | |
6557 | case elfcpp::R_POWERPC_ADDR16_LO: | |
6558 | case elfcpp::R_POWERPC_ADDR16_HI: | |
6559 | case elfcpp::R_POWERPC_ADDR16_HA: | |
6560 | case elfcpp::R_POWERPC_ADDR14: | |
6561 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6562 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6563 | case elfcpp::R_POWERPC_REL32: | |
42cacb20 | 6564 | case elfcpp::R_POWERPC_REL24: |
3ea0a085 AM |
6565 | case elfcpp::R_POWERPC_TPREL16: |
6566 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6567 | case elfcpp::R_POWERPC_TPREL16_HI: | |
6568 | case elfcpp::R_POWERPC_TPREL16_HA: | |
42cacb20 DE |
6569 | return; |
6570 | ||
6571 | default: | |
6572 | break; | |
6573 | } | |
6574 | ||
6575 | if (size == 64) | |
6576 | { | |
6577 | switch (r_type) | |
6578 | { | |
6579 | // These are the relocation types supported only on 64-bit. | |
6580 | case elfcpp::R_PPC64_ADDR64: | |
42cacb20 | 6581 | case elfcpp::R_PPC64_UADDR64: |
3ea0a085 | 6582 | case elfcpp::R_PPC64_JMP_IREL: |
42cacb20 | 6583 | case elfcpp::R_PPC64_ADDR16_DS: |
3ea0a085 | 6584 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
f9c6b907 AM |
6585 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6586 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
42cacb20 DE |
6587 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6588 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6589 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6590 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
42cacb20 | 6591 | case elfcpp::R_PPC64_REL64: |
3ea0a085 AM |
6592 | case elfcpp::R_POWERPC_ADDR30: |
6593 | case elfcpp::R_PPC64_TPREL16_DS: | |
6594 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
6595 | case elfcpp::R_PPC64_TPREL16_HIGH: |
6596 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
3ea0a085 AM |
6597 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
6598 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
6599 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
6600 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
42cacb20 DE |
6601 | return; |
6602 | ||
6603 | default: | |
6604 | break; | |
6605 | } | |
6606 | } | |
6607 | else | |
6608 | { | |
6609 | switch (r_type) | |
6610 | { | |
6611 | // These are the relocation types supported only on 32-bit. | |
3ea0a085 AM |
6612 | // ??? glibc ld.so doesn't need to support these. |
6613 | case elfcpp::R_POWERPC_DTPREL16: | |
6614 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6615 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6616 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
6617 | return; | |
42cacb20 DE |
6618 | |
6619 | default: | |
6620 | break; | |
6621 | } | |
6622 | } | |
6623 | ||
6624 | // This prevents us from issuing more than one error per reloc | |
6625 | // section. But we can still wind up issuing more than one | |
6626 | // error per object file. | |
6627 | if (this->issued_non_pic_error_) | |
6628 | return; | |
33aea2fd | 6629 | gold_assert(parameters->options().output_is_position_independent()); |
42cacb20 DE |
6630 | object->error(_("requires unsupported dynamic reloc; " |
6631 | "recompile with -fPIC")); | |
6632 | this->issued_non_pic_error_ = true; | |
6633 | return; | |
6634 | } | |
6635 | ||
e5d5f5ed AM |
6636 | // Return whether we need to make a PLT entry for a relocation of the |
6637 | // given type against a STT_GNU_IFUNC symbol. | |
6638 | ||
6639 | template<int size, bool big_endian> | |
6640 | bool | |
6641 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
9055360d | 6642 | Target_powerpc<size, big_endian>* target, |
e5d5f5ed | 6643 | Sized_relobj_file<size, big_endian>* object, |
b3ccdeb5 AM |
6644 | unsigned int r_type, |
6645 | bool report_err) | |
e5d5f5ed | 6646 | { |
c9824451 AM |
6647 | // In non-pic code any reference will resolve to the plt call stub |
6648 | // for the ifunc symbol. | |
9055360d AM |
6649 | if ((size == 32 || target->abiversion() >= 2) |
6650 | && !parameters->options().output_is_position_independent()) | |
c9824451 AM |
6651 | return true; |
6652 | ||
e5d5f5ed AM |
6653 | switch (r_type) |
6654 | { | |
b3ccdeb5 | 6655 | // Word size refs from data sections are OK, but don't need a PLT entry. |
e5d5f5ed AM |
6656 | case elfcpp::R_POWERPC_ADDR32: |
6657 | case elfcpp::R_POWERPC_UADDR32: | |
6658 | if (size == 32) | |
b3ccdeb5 | 6659 | return false; |
e5d5f5ed AM |
6660 | break; |
6661 | ||
6662 | case elfcpp::R_PPC64_ADDR64: | |
6663 | case elfcpp::R_PPC64_UADDR64: | |
6664 | if (size == 64) | |
b3ccdeb5 | 6665 | return false; |
e5d5f5ed AM |
6666 | break; |
6667 | ||
b3ccdeb5 | 6668 | // GOT refs are good, but also don't need a PLT entry. |
e5d5f5ed AM |
6669 | case elfcpp::R_POWERPC_GOT16: |
6670 | case elfcpp::R_POWERPC_GOT16_LO: | |
6671 | case elfcpp::R_POWERPC_GOT16_HI: | |
6672 | case elfcpp::R_POWERPC_GOT16_HA: | |
6673 | case elfcpp::R_PPC64_GOT16_DS: | |
6674 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
b3ccdeb5 | 6675 | return false; |
e5d5f5ed | 6676 | |
08be3224 AM |
6677 | // PLT relocs are OK and need a PLT entry. |
6678 | case elfcpp::R_POWERPC_PLT16_LO: | |
6679 | case elfcpp::R_POWERPC_PLT16_HI: | |
6680 | case elfcpp::R_POWERPC_PLT16_HA: | |
6681 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
23cedd1d AM |
6682 | case elfcpp::R_POWERPC_PLTSEQ: |
6683 | case elfcpp::R_POWERPC_PLTCALL: | |
08be3224 AM |
6684 | return true; |
6685 | break; | |
6686 | ||
b3ccdeb5 | 6687 | // Function calls are good, and these do need a PLT entry. |
e5d5f5ed AM |
6688 | case elfcpp::R_POWERPC_ADDR24: |
6689 | case elfcpp::R_POWERPC_ADDR14: | |
6690 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6691 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
6692 | case elfcpp::R_POWERPC_REL24: | |
6693 | case elfcpp::R_PPC_PLTREL24: | |
6694 | case elfcpp::R_POWERPC_REL14: | |
6695 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6696 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
6697 | return true; | |
6698 | ||
6699 | default: | |
6700 | break; | |
6701 | } | |
6702 | ||
6703 | // Anything else is a problem. | |
6704 | // If we are building a static executable, the libc startup function | |
6705 | // responsible for applying indirect function relocations is going | |
6706 | // to complain about the reloc type. | |
6707 | // If we are building a dynamic executable, we will have a text | |
6708 | // relocation. The dynamic loader will set the text segment | |
6709 | // writable and non-executable to apply text relocations. So we'll | |
6710 | // segfault when trying to run the indirection function to resolve | |
6711 | // the reloc. | |
b3ccdeb5 AM |
6712 | if (report_err) |
6713 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), | |
e5d5f5ed AM |
6714 | object->name().c_str(), r_type); |
6715 | return false; | |
6716 | } | |
6717 | ||
5edad15d AM |
6718 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
6719 | // reloc. | |
6720 | ||
6721 | static bool | |
6722 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) | |
6723 | { | |
6724 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ | |
6725 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ | |
6726 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ | |
6727 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ | |
6728 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ | |
6729 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ | |
6730 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ | |
6731 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ | |
6732 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ | |
6733 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ | |
6734 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ | |
6735 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ | |
6736 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ | |
6737 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ | |
6738 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ | |
6739 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ | |
6740 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ | |
6741 | /* Exclude lfqu by testing reloc. If relocs are ever | |
6742 | defined for the reduced D field in psq_lu then those | |
6743 | will need testing too. */ | |
6744 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6745 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6746 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ | |
6747 | && (insn & 1) == 0) | |
6748 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ | |
6749 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ | |
6750 | /* Exclude stfqu. psq_stu as above for psq_lu. */ | |
6751 | && r_type != elfcpp::R_PPC64_TOC16_LO | |
6752 | && r_type != elfcpp::R_POWERPC_GOT16_LO) | |
6753 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ | |
6754 | && (insn & 1) == 0)); | |
6755 | } | |
6756 | ||
42cacb20 DE |
6757 | // Scan a relocation for a local symbol. |
6758 | ||
6759 | template<int size, bool big_endian> | |
6760 | inline void | |
6761 | Target_powerpc<size, big_endian>::Scan::local( | |
d83ce4e3 AM |
6762 | Symbol_table* symtab, |
6763 | Layout* layout, | |
6764 | Target_powerpc<size, big_endian>* target, | |
6765 | Sized_relobj_file<size, big_endian>* object, | |
6766 | unsigned int data_shndx, | |
6767 | Output_section* output_section, | |
6768 | const elfcpp::Rela<size, big_endian>& reloc, | |
6769 | unsigned int r_type, | |
e5d5f5ed | 6770 | const elfcpp::Sym<size, big_endian>& lsym, |
bfdfa4cd | 6771 | bool is_discarded) |
42cacb20 | 6772 | { |
34e0882b | 6773 | this->maybe_skip_tls_get_addr_call(target, r_type, NULL); |
e3deeb9c AM |
6774 | |
6775 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
6776 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
6777 | { | |
6778 | this->expect_tls_get_addr_call(); | |
6779 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
6780 | if (tls_type != tls::TLSOPT_NONE) | |
6781 | this->skip_next_tls_get_addr_call(); | |
6782 | } | |
6783 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
6784 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
6785 | { | |
6786 | this->expect_tls_get_addr_call(); | |
6787 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
6788 | if (tls_type != tls::TLSOPT_NONE) | |
6789 | this->skip_next_tls_get_addr_call(); | |
6790 | } | |
6791 | ||
dd93cd0a AM |
6792 | Powerpc_relobj<size, big_endian>* ppc_object |
6793 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
6794 | ||
bfdfa4cd AM |
6795 | if (is_discarded) |
6796 | { | |
6797 | if (size == 64 | |
6798 | && data_shndx == ppc_object->opd_shndx() | |
6799 | && r_type == elfcpp::R_PPC64_ADDR64) | |
6800 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
6801 | return; | |
6802 | } | |
6803 | ||
e5d5f5ed AM |
6804 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6805 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
9055360d | 6806 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
40b469d7 | 6807 | { |
ec661b9d AM |
6808 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
6809 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6810 | r_type, r_sym, reloc.get_r_addend()); | |
6811 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
40b469d7 | 6812 | } |
e5d5f5ed | 6813 | |
42cacb20 DE |
6814 | switch (r_type) |
6815 | { | |
6816 | case elfcpp::R_POWERPC_NONE: | |
6817 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
6818 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
7404fe1b | 6819 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 6820 | case elfcpp::R_PPC64_ENTRY: |
23cedd1d AM |
6821 | case elfcpp::R_POWERPC_PLTSEQ: |
6822 | case elfcpp::R_POWERPC_PLTCALL: | |
dd93cd0a AM |
6823 | break; |
6824 | ||
6825 | case elfcpp::R_PPC64_TOC: | |
6826 | { | |
6827 | Output_data_got_powerpc<size, big_endian>* got | |
6828 | = target->got_section(symtab, layout); | |
6829 | if (parameters->options().output_is_position_independent()) | |
6830 | { | |
bfdfa4cd AM |
6831 | Address off = reloc.get_r_offset(); |
6832 | if (size == 64 | |
9055360d | 6833 | && target->abiversion() < 2 |
bfdfa4cd AM |
6834 | && data_shndx == ppc_object->opd_shndx() |
6835 | && ppc_object->get_opd_discard(off - 8)) | |
6836 | break; | |
6837 | ||
dd93cd0a | 6838 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
bfdfa4cd | 6839 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
dd93cd0a AM |
6840 | rela_dyn->add_output_section_relative(got->output_section(), |
6841 | elfcpp::R_POWERPC_RELATIVE, | |
6842 | output_section, | |
bfdfa4cd AM |
6843 | object, data_shndx, off, |
6844 | symobj->toc_base_offset()); | |
dd93cd0a AM |
6845 | } |
6846 | } | |
42cacb20 DE |
6847 | break; |
6848 | ||
6849 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 6850 | case elfcpp::R_PPC64_UADDR64: |
42cacb20 | 6851 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
6852 | case elfcpp::R_POWERPC_UADDR32: |
6853 | case elfcpp::R_POWERPC_ADDR24: | |
c9269dff | 6854 | case elfcpp::R_POWERPC_ADDR16: |
42cacb20 | 6855 | case elfcpp::R_POWERPC_ADDR16_LO: |
c9269dff AM |
6856 | case elfcpp::R_POWERPC_ADDR16_HI: |
6857 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 6858 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
6859 | case elfcpp::R_PPC64_ADDR16_HIGH: |
6860 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
6861 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
6862 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
6863 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
6864 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
6865 | case elfcpp::R_PPC64_ADDR16_DS: | |
6866 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
6867 | case elfcpp::R_POWERPC_ADDR14: | |
6868 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
6869 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 DE |
6870 | // If building a shared library (or a position-independent |
6871 | // executable), we need to create a dynamic relocation for | |
6872 | // this location. | |
c9824451 | 6873 | if (parameters->options().output_is_position_independent() |
9055360d | 6874 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
2e702c99 | 6875 | { |
b3ccdeb5 AM |
6876 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
6877 | is_ifunc); | |
1f98a074 | 6878 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
dd93cd0a AM |
6879 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
6880 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) | |
2e702c99 | 6881 | { |
b3ccdeb5 AM |
6882 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
6883 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 6884 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
dd93cd0a AM |
6885 | output_section, data_shndx, |
6886 | reloc.get_r_offset(), | |
c9824451 | 6887 | reloc.get_r_addend(), false); |
2e702c99 | 6888 | } |
1f98a074 | 6889 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
2e702c99 | 6890 | { |
dd93cd0a | 6891 | check_non_pic(object, r_type); |
dd93cd0a AM |
6892 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
6893 | data_shndx, reloc.get_r_offset(), | |
6894 | reloc.get_r_addend()); | |
2e702c99 | 6895 | } |
1f98a074 AM |
6896 | else |
6897 | { | |
6898 | gold_assert(lsym.get_st_value() == 0); | |
6899 | unsigned int shndx = lsym.get_st_shndx(); | |
6900 | bool is_ordinary; | |
6901 | shndx = object->adjust_sym_shndx(r_sym, shndx, | |
6902 | &is_ordinary); | |
6903 | if (!is_ordinary) | |
6904 | object->error(_("section symbol %u has bad shndx %u"), | |
6905 | r_sym, shndx); | |
6906 | else | |
6907 | rela_dyn->add_local_section(object, shndx, r_type, | |
6908 | output_section, data_shndx, | |
6909 | reloc.get_r_offset()); | |
6910 | } | |
2e702c99 | 6911 | } |
42cacb20 DE |
6912 | break; |
6913 | ||
2d7ad24e AM |
6914 | case elfcpp::R_POWERPC_PLT16_LO: |
6915 | case elfcpp::R_POWERPC_PLT16_HI: | |
6916 | case elfcpp::R_POWERPC_PLT16_HA: | |
6917 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
6918 | if (!is_ifunc) | |
6919 | { | |
6920 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6921 | target->make_local_plt_entry(layout, object, r_sym); | |
6922 | } | |
6923 | break; | |
6924 | ||
42cacb20 | 6925 | case elfcpp::R_POWERPC_REL24: |
c9824451 | 6926 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 6927 | case elfcpp::R_PPC_LOCAL24PC: |
ec661b9d AM |
6928 | case elfcpp::R_POWERPC_REL14: |
6929 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
6930 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 6931 | if (!is_ifunc) |
0e123f69 AM |
6932 | { |
6933 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6934 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
6935 | r_type, r_sym, reloc.get_r_addend()); | |
6936 | } | |
ec661b9d AM |
6937 | break; |
6938 | ||
7e57d19e AM |
6939 | case elfcpp::R_PPC64_TOCSAVE: |
6940 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
6941 | // caller has already saved r2 and thus a plt call stub need not | |
6942 | // save r2. | |
6943 | if (size == 64 | |
6944 | && target->mark_pltcall(ppc_object, data_shndx, | |
6945 | reloc.get_r_offset() - 4, symtab)) | |
6946 | { | |
6947 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
6948 | unsigned int shndx = lsym.get_st_shndx(); | |
6949 | bool is_ordinary; | |
6950 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
6951 | if (!is_ordinary) | |
6952 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
6953 | r_sym, shndx); | |
6954 | else | |
6955 | target->add_tocsave(ppc_object, shndx, | |
6956 | lsym.get_st_value() + reloc.get_r_addend()); | |
6957 | } | |
6958 | break; | |
6959 | ||
ec661b9d AM |
6960 | case elfcpp::R_PPC64_REL64: |
6961 | case elfcpp::R_POWERPC_REL32: | |
dd93cd0a | 6962 | case elfcpp::R_POWERPC_REL16: |
6ce78956 | 6963 | case elfcpp::R_POWERPC_REL16_LO: |
dd93cd0a | 6964 | case elfcpp::R_POWERPC_REL16_HI: |
6ce78956 | 6965 | case elfcpp::R_POWERPC_REL16_HA: |
a680de9a | 6966 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 6967 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 6968 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 6969 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 6970 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
6971 | case elfcpp::R_PPC64_SECTOFF_DS: |
6972 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
6973 | case elfcpp::R_POWERPC_TPREL16: | |
6974 | case elfcpp::R_POWERPC_TPREL16_LO: | |
6975 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 6976 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
6977 | case elfcpp::R_PPC64_TPREL16_DS: |
6978 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
6979 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
6980 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 6981 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 6982 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 6983 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 6984 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
6985 | case elfcpp::R_POWERPC_DTPREL16: |
6986 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
6987 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
6988 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
6989 | case elfcpp::R_PPC64_DTPREL16_DS: |
6990 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
6991 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
6992 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
6993 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
6994 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
6995 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
6996 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
6997 | case elfcpp::R_PPC64_TLSGD: |
6998 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 6999 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
42cacb20 DE |
7000 | break; |
7001 | ||
7002 | case elfcpp::R_POWERPC_GOT16: | |
7003 | case elfcpp::R_POWERPC_GOT16_LO: | |
7004 | case elfcpp::R_POWERPC_GOT16_HI: | |
7005 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
7006 | case elfcpp::R_PPC64_GOT16_DS: |
7007 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 7008 | { |
c9269dff | 7009 | // The symbol requires a GOT entry. |
dd93cd0a AM |
7010 | Output_data_got_powerpc<size, big_endian>* got |
7011 | = target->got_section(symtab, layout); | |
7012 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
42cacb20 | 7013 | |
e5d5f5ed | 7014 | if (!parameters->options().output_is_position_independent()) |
42cacb20 | 7015 | { |
b01a4b04 AM |
7016 | if (is_ifunc |
7017 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
7018 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
7019 | else | |
7020 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
7021 | } | |
7022 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) | |
7023 | { | |
7024 | // If we are generating a shared object or a pie, this | |
7025 | // symbol's GOT entry will be set by a dynamic relocation. | |
7026 | unsigned int off; | |
7027 | off = got->add_constant(0); | |
7028 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); | |
42cacb20 | 7029 | |
b3ccdeb5 AM |
7030 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
7031 | is_ifunc); | |
7032 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
7033 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed | 7034 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
c9824451 | 7035 | got, off, 0, false); |
2e702c99 | 7036 | } |
42cacb20 DE |
7037 | } |
7038 | break; | |
7039 | ||
cf43a2fe AM |
7040 | case elfcpp::R_PPC64_TOC16: |
7041 | case elfcpp::R_PPC64_TOC16_LO: | |
7042 | case elfcpp::R_PPC64_TOC16_HI: | |
7043 | case elfcpp::R_PPC64_TOC16_HA: | |
7044 | case elfcpp::R_PPC64_TOC16_DS: | |
7045 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
7046 | // We need a GOT section. |
7047 | target->got_section(symtab, layout); | |
7048 | break; | |
7049 | ||
dd93cd0a AM |
7050 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7051 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7052 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7053 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7054 | { | |
7055 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); | |
7056 | if (tls_type == tls::TLSOPT_NONE) | |
7057 | { | |
7058 | Output_data_got_powerpc<size, big_endian>* got | |
7059 | = target->got_section(symtab, layout); | |
7060 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d AM |
7061 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7062 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, | |
7063 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); | |
dd93cd0a AM |
7064 | } |
7065 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7066 | { | |
7067 | // no GOT relocs needed for Local Exec. | |
7068 | } | |
7069 | else | |
7070 | gold_unreachable(); | |
7071 | } | |
42cacb20 DE |
7072 | break; |
7073 | ||
dd93cd0a AM |
7074 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7075 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7076 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7077 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7078 | { | |
7079 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7080 | if (tls_type == tls::TLSOPT_NONE) | |
7081 | target->tlsld_got_offset(symtab, layout, object); | |
7082 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7083 | { | |
7084 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7085 | if (parameters->options().emit_relocs()) |
7086 | { | |
7087 | Output_section* os = layout->tls_segment()->first_section(); | |
7088 | gold_assert(os != NULL); | |
7089 | os->set_needs_symtab_index(); | |
7090 | } | |
dd93cd0a AM |
7091 | } |
7092 | else | |
7093 | gold_unreachable(); | |
7094 | } | |
42cacb20 | 7095 | break; |
42cacb20 | 7096 | |
dd93cd0a AM |
7097 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
7098 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7099 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7100 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7101 | { | |
7102 | Output_data_got_powerpc<size, big_endian>* got | |
7103 | = target->got_section(symtab, layout); | |
7104 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
bd73a62d | 7105 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
dd93cd0a AM |
7106 | } |
7107 | break; | |
42cacb20 | 7108 | |
dd93cd0a AM |
7109 | case elfcpp::R_POWERPC_GOT_TPREL16: |
7110 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7111 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7112 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7113 | { | |
7114 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); | |
7115 | if (tls_type == tls::TLSOPT_NONE) | |
7116 | { | |
dd93cd0a | 7117 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
acc276d8 AM |
7118 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
7119 | { | |
7120 | Output_data_got_powerpc<size, big_endian>* got | |
7121 | = target->got_section(symtab, layout); | |
7122 | unsigned int off = got->add_constant(0); | |
7123 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); | |
7124 | ||
7125 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7126 | rela_dyn->add_symbolless_local_addend(object, r_sym, | |
7127 | elfcpp::R_POWERPC_TPREL, | |
7128 | got, off, 0); | |
7129 | } | |
dd93cd0a AM |
7130 | } |
7131 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7132 | { | |
7133 | // no GOT relocs needed for Local Exec. | |
7134 | } | |
7135 | else | |
7136 | gold_unreachable(); | |
7137 | } | |
7138 | break; | |
7139 | ||
7140 | default: | |
7141 | unsupported_reloc_local(object, r_type); | |
7142 | break; | |
7143 | } | |
d8f5a274 | 7144 | |
5edad15d AM |
7145 | if (size == 64 |
7146 | && parameters->options().toc_optimize()) | |
7147 | { | |
7148 | if (data_shndx == ppc_object->toc_shndx()) | |
7149 | { | |
7150 | bool ok = true; | |
7151 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7152 | || (is_ifunc && target->abiversion() < 2)) | |
7153 | ok = false; | |
7154 | else if (parameters->options().output_is_position_independent()) | |
7155 | { | |
7156 | if (is_ifunc) | |
7157 | ok = false; | |
7158 | else | |
7159 | { | |
7160 | unsigned int shndx = lsym.get_st_shndx(); | |
7161 | if (shndx >= elfcpp::SHN_LORESERVE | |
7162 | && shndx != elfcpp::SHN_XINDEX) | |
7163 | ok = false; | |
7164 | } | |
7165 | } | |
7166 | if (!ok) | |
7167 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7168 | } | |
7169 | ||
7170 | enum {no_check, check_lo, check_ha} insn_check; | |
7171 | switch (r_type) | |
7172 | { | |
7173 | default: | |
7174 | insn_check = no_check; | |
7175 | break; | |
7176 | ||
7177 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7178 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7179 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7180 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7181 | case elfcpp::R_POWERPC_GOT16_HA: | |
7182 | case elfcpp::R_PPC64_TOC16_HA: | |
7183 | insn_check = check_ha; | |
7184 | break; | |
7185 | ||
7186 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7187 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7188 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7189 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7190 | case elfcpp::R_POWERPC_GOT16_LO: | |
7191 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7192 | case elfcpp::R_PPC64_TOC16_LO: | |
7193 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7194 | insn_check = check_lo; | |
7195 | break; | |
7196 | } | |
7197 | ||
7198 | section_size_type slen; | |
7199 | const unsigned char* view = NULL; | |
7200 | if (insn_check != no_check) | |
7201 | { | |
7202 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7203 | section_size_type off = | |
7204 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7205 | if (off < slen) | |
7206 | { | |
7207 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7208 | if (insn_check == check_lo | |
7209 | ? !ok_lo_toc_insn(insn, r_type) | |
7210 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7211 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7212 | { | |
7213 | ppc_object->set_no_toc_opt(); | |
7214 | gold_warning(_("%s: toc optimization is not supported " | |
7215 | "for %#08x instruction"), | |
7216 | ppc_object->name().c_str(), insn); | |
7217 | } | |
7218 | } | |
7219 | } | |
7220 | ||
7221 | switch (r_type) | |
7222 | { | |
7223 | default: | |
7224 | break; | |
7225 | case elfcpp::R_PPC64_TOC16: | |
7226 | case elfcpp::R_PPC64_TOC16_LO: | |
7227 | case elfcpp::R_PPC64_TOC16_HI: | |
7228 | case elfcpp::R_PPC64_TOC16_HA: | |
7229 | case elfcpp::R_PPC64_TOC16_DS: | |
7230 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7231 | unsigned int shndx = lsym.get_st_shndx(); | |
7232 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7233 | bool is_ordinary; | |
7234 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
7235 | if (is_ordinary && shndx == ppc_object->toc_shndx()) | |
7236 | { | |
412294da | 7237 | Address dst_off = lsym.get_st_value() + reloc.get_r_addend(); |
5edad15d AM |
7238 | if (dst_off < ppc_object->section_size(shndx)) |
7239 | { | |
7240 | bool ok = false; | |
7241 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7242 | ok = true; | |
7243 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7244 | { | |
7245 | // Need to check that the insn is a ld | |
7246 | if (!view) | |
7247 | view = ppc_object->section_contents(data_shndx, | |
7248 | &slen, | |
7249 | false); | |
7250 | section_size_type off = | |
7251 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7252 | + (big_endian ? -2 : 3)); | |
7253 | if (off < slen | |
7254 | && (view[off] & (0x3f << 2)) == 58u << 2) | |
7255 | ok = true; | |
7256 | } | |
7257 | if (!ok) | |
7258 | ppc_object->set_no_toc_opt(dst_off); | |
7259 | } | |
7260 | } | |
7261 | break; | |
7262 | } | |
7263 | } | |
7264 | ||
f159cdb6 AM |
7265 | if (size == 32) |
7266 | { | |
7267 | switch (r_type) | |
7268 | { | |
7269 | case elfcpp::R_POWERPC_REL32: | |
7270 | if (ppc_object->got2_shndx() != 0 | |
7271 | && parameters->options().output_is_position_independent()) | |
7272 | { | |
7273 | unsigned int shndx = lsym.get_st_shndx(); | |
7274 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7275 | bool is_ordinary; | |
7276 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
7277 | if (is_ordinary && shndx == ppc_object->got2_shndx() | |
7278 | && (ppc_object->section_flags(data_shndx) | |
7279 | & elfcpp::SHF_EXECINSTR) != 0) | |
7280 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7281 | ppc_object->name().c_str()); | |
7282 | } | |
7283 | break; | |
7284 | default: | |
7285 | break; | |
7286 | } | |
7287 | } | |
7288 | ||
d8f5a274 AM |
7289 | switch (r_type) |
7290 | { | |
7291 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7292 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7293 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7294 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7295 | case elfcpp::R_POWERPC_GOT16: | |
7296 | case elfcpp::R_PPC64_GOT16_DS: | |
7297 | case elfcpp::R_PPC64_TOC16: | |
7298 | case elfcpp::R_PPC64_TOC16_DS: | |
7299 | ppc_object->set_has_small_toc_reloc(); | |
7300 | default: | |
7301 | break; | |
7302 | } | |
dd93cd0a AM |
7303 | } |
7304 | ||
7305 | // Report an unsupported relocation against a global symbol. | |
7306 | ||
7307 | template<int size, bool big_endian> | |
7308 | void | |
7309 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( | |
7310 | Sized_relobj_file<size, big_endian>* object, | |
7311 | unsigned int r_type, | |
7312 | Symbol* gsym) | |
7313 | { | |
42cacb20 DE |
7314 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
7315 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
7316 | } | |
7317 | ||
7318 | // Scan a relocation for a global symbol. | |
7319 | ||
7320 | template<int size, bool big_endian> | |
7321 | inline void | |
7322 | Target_powerpc<size, big_endian>::Scan::global( | |
d83ce4e3 AM |
7323 | Symbol_table* symtab, |
7324 | Layout* layout, | |
7325 | Target_powerpc<size, big_endian>* target, | |
7326 | Sized_relobj_file<size, big_endian>* object, | |
7327 | unsigned int data_shndx, | |
7328 | Output_section* output_section, | |
7329 | const elfcpp::Rela<size, big_endian>& reloc, | |
7330 | unsigned int r_type, | |
7331 | Symbol* gsym) | |
42cacb20 | 7332 | { |
34e0882b AM |
7333 | if (this->maybe_skip_tls_get_addr_call(target, r_type, gsym) |
7334 | == Track_tls::SKIP) | |
e3deeb9c AM |
7335 | return; |
7336 | ||
34e0882b AM |
7337 | if (target->replace_tls_get_addr(gsym)) |
7338 | // Change a __tls_get_addr reference to __tls_get_addr_opt | |
7339 | // so dynamic relocs are emitted against the latter symbol. | |
7340 | gsym = target->tls_get_addr_opt(); | |
7341 | ||
e3deeb9c AM |
7342 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
7343 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
7344 | { | |
7345 | this->expect_tls_get_addr_call(); | |
7346 | const bool final = gsym->final_value_is_known(); | |
7347 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7348 | if (tls_type != tls::TLSOPT_NONE) | |
7349 | this->skip_next_tls_get_addr_call(); | |
7350 | } | |
7351 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
7352 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
7353 | { | |
7354 | this->expect_tls_get_addr_call(); | |
7355 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7356 | if (tls_type != tls::TLSOPT_NONE) | |
7357 | this->skip_next_tls_get_addr_call(); | |
7358 | } | |
7359 | ||
dd93cd0a AM |
7360 | Powerpc_relobj<size, big_endian>* ppc_object |
7361 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
7362 | ||
e5d5f5ed | 7363 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
b3ccdeb5 | 7364 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
9055360d AM |
7365 | bool pushed_ifunc = false; |
7366 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) | |
ec661b9d | 7367 | { |
0e123f69 | 7368 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
ec661b9d | 7369 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7370 | r_type, r_sym, reloc.get_r_addend()); |
ec661b9d | 7371 | target->make_plt_entry(symtab, layout, gsym); |
9055360d | 7372 | pushed_ifunc = true; |
ec661b9d | 7373 | } |
e5d5f5ed | 7374 | |
42cacb20 DE |
7375 | switch (r_type) |
7376 | { | |
7377 | case elfcpp::R_POWERPC_NONE: | |
7378 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
7379 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
cf43a2fe | 7380 | case elfcpp::R_PPC_LOCAL24PC: |
7404fe1b | 7381 | case elfcpp::R_POWERPC_TLS: |
549dba71 | 7382 | case elfcpp::R_PPC64_ENTRY: |
23cedd1d AM |
7383 | case elfcpp::R_POWERPC_PLTSEQ: |
7384 | case elfcpp::R_POWERPC_PLTCALL: | |
dd93cd0a AM |
7385 | break; |
7386 | ||
7387 | case elfcpp::R_PPC64_TOC: | |
7388 | { | |
7389 | Output_data_got_powerpc<size, big_endian>* got | |
7390 | = target->got_section(symtab, layout); | |
7391 | if (parameters->options().output_is_position_independent()) | |
7392 | { | |
bfdfa4cd AM |
7393 | Address off = reloc.get_r_offset(); |
7394 | if (size == 64 | |
7395 | && data_shndx == ppc_object->opd_shndx() | |
7396 | && ppc_object->get_opd_discard(off - 8)) | |
7397 | break; | |
7398 | ||
dd93cd0a AM |
7399 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7400 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; | |
7401 | if (data_shndx != ppc_object->opd_shndx()) | |
7402 | symobj = static_cast | |
7403 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7404 | rela_dyn->add_output_section_relative(got->output_section(), | |
7405 | elfcpp::R_POWERPC_RELATIVE, | |
7406 | output_section, | |
bfdfa4cd | 7407 | object, data_shndx, off, |
dd93cd0a AM |
7408 | symobj->toc_base_offset()); |
7409 | } | |
7410 | } | |
42cacb20 DE |
7411 | break; |
7412 | ||
c9269dff | 7413 | case elfcpp::R_PPC64_ADDR64: |
bfdfa4cd | 7414 | if (size == 64 |
9055360d | 7415 | && target->abiversion() < 2 |
bfdfa4cd AM |
7416 | && data_shndx == ppc_object->opd_shndx() |
7417 | && (gsym->is_defined_in_discarded_section() | |
7418 | || gsym->object() != object)) | |
7419 | { | |
7420 | ppc_object->set_opd_discard(reloc.get_r_offset()); | |
7421 | break; | |
7422 | } | |
d8e90251 | 7423 | // Fall through. |
dd93cd0a | 7424 | case elfcpp::R_PPC64_UADDR64: |
c9269dff | 7425 | case elfcpp::R_POWERPC_ADDR32: |
dd93cd0a AM |
7426 | case elfcpp::R_POWERPC_UADDR32: |
7427 | case elfcpp::R_POWERPC_ADDR24: | |
42cacb20 DE |
7428 | case elfcpp::R_POWERPC_ADDR16: |
7429 | case elfcpp::R_POWERPC_ADDR16_LO: | |
7430 | case elfcpp::R_POWERPC_ADDR16_HI: | |
7431 | case elfcpp::R_POWERPC_ADDR16_HA: | |
dd93cd0a | 7432 | case elfcpp::R_POWERPC_UADDR16: |
f9c6b907 AM |
7433 | case elfcpp::R_PPC64_ADDR16_HIGH: |
7434 | case elfcpp::R_PPC64_ADDR16_HIGHA: | |
dd93cd0a AM |
7435 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
7436 | case elfcpp::R_PPC64_ADDR16_HIGHERA: | |
7437 | case elfcpp::R_PPC64_ADDR16_HIGHEST: | |
7438 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: | |
7439 | case elfcpp::R_PPC64_ADDR16_DS: | |
7440 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
7441 | case elfcpp::R_POWERPC_ADDR14: | |
7442 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
7443 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
42cacb20 | 7444 | { |
c9269dff AM |
7445 | // Make a PLT entry if necessary. |
7446 | if (gsym->needs_plt_entry()) | |
7447 | { | |
9055360d AM |
7448 | // Since this is not a PC-relative relocation, we may be |
7449 | // taking the address of a function. In that case we need to | |
7450 | // set the entry in the dynamic symbol table to the address of | |
7451 | // the PLT call stub. | |
7452 | bool need_ifunc_plt = false; | |
7453 | if ((size == 32 || target->abiversion() >= 2) | |
7454 | && gsym->is_from_dynobj() | |
7455 | && !parameters->options().output_is_position_independent()) | |
7456 | { | |
7457 | gsym->set_needs_dynsym_value(); | |
7458 | need_ifunc_plt = true; | |
7459 | } | |
7460 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) | |
b3ccdeb5 | 7461 | { |
0e123f69 | 7462 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7463 | target->push_branch(ppc_object, data_shndx, |
0e123f69 | 7464 | reloc.get_r_offset(), r_type, r_sym, |
b3ccdeb5 AM |
7465 | reloc.get_r_addend()); |
7466 | target->make_plt_entry(symtab, layout, gsym); | |
7467 | } | |
c9269dff AM |
7468 | } |
7469 | // Make a dynamic relocation if necessary. | |
88b8e639 | 7470 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
9055360d | 7471 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
c9269dff | 7472 | { |
a82bef93 ST |
7473 | if (!parameters->options().output_is_position_independent() |
7474 | && gsym->may_need_copy_reloc()) | |
c9269dff AM |
7475 | { |
7476 | target->copy_reloc(symtab, layout, object, | |
7477 | data_shndx, output_section, gsym, reloc); | |
7478 | } | |
9055360d AM |
7479 | else if ((((size == 32 |
7480 | && r_type == elfcpp::R_POWERPC_ADDR32) | |
7481 | || (size == 64 | |
7482 | && r_type == elfcpp::R_PPC64_ADDR64 | |
7483 | && target->abiversion() >= 2)) | |
627b30b7 AM |
7484 | && gsym->can_use_relative_reloc(false) |
7485 | && !(gsym->visibility() == elfcpp::STV_PROTECTED | |
7486 | && parameters->options().shared())) | |
7487 | || (size == 64 | |
7488 | && r_type == elfcpp::R_PPC64_ADDR64 | |
9055360d | 7489 | && target->abiversion() < 2 |
627b30b7 AM |
7490 | && (gsym->can_use_relative_reloc(false) |
7491 | || data_shndx == ppc_object->opd_shndx()))) | |
2e702c99 | 7492 | { |
b3ccdeb5 AM |
7493 | Reloc_section* rela_dyn |
7494 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7495 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE | |
7496 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7497 | rela_dyn->add_symbolless_global_addend( |
7498 | gsym, dynrel, output_section, object, data_shndx, | |
7499 | reloc.get_r_offset(), reloc.get_r_addend()); | |
2e702c99 RM |
7500 | } |
7501 | else | |
7502 | { | |
b3ccdeb5 AM |
7503 | Reloc_section* rela_dyn |
7504 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
42cacb20 | 7505 | check_non_pic(object, r_type); |
dd93cd0a AM |
7506 | rela_dyn->add_global(gsym, r_type, output_section, |
7507 | object, data_shndx, | |
7508 | reloc.get_r_offset(), | |
7509 | reloc.get_r_addend()); | |
5edad15d AM |
7510 | |
7511 | if (size == 64 | |
7512 | && parameters->options().toc_optimize() | |
7513 | && data_shndx == ppc_object->toc_shndx()) | |
7514 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
2e702c99 RM |
7515 | } |
7516 | } | |
42cacb20 DE |
7517 | } |
7518 | break; | |
7519 | ||
08be3224 AM |
7520 | case elfcpp::R_POWERPC_PLT16_LO: |
7521 | case elfcpp::R_POWERPC_PLT16_HI: | |
7522 | case elfcpp::R_POWERPC_PLT16_HA: | |
7523 | case elfcpp::R_PPC64_PLT16_LO_DS: | |
7524 | if (!pushed_ifunc) | |
7525 | target->make_plt_entry(symtab, layout, gsym); | |
7526 | break; | |
7527 | ||
cf43a2fe | 7528 | case elfcpp::R_PPC_PLTREL24: |
42cacb20 | 7529 | case elfcpp::R_POWERPC_REL24: |
b3ccdeb5 AM |
7530 | if (!is_ifunc) |
7531 | { | |
0e123f69 | 7532 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
b3ccdeb5 | 7533 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
0e123f69 | 7534 | r_type, r_sym, reloc.get_r_addend()); |
b3ccdeb5 AM |
7535 | if (gsym->needs_plt_entry() |
7536 | || (!gsym->final_value_is_known() | |
7537 | && (gsym->is_undefined() | |
7538 | || gsym->is_from_dynobj() | |
7539 | || gsym->is_preemptible()))) | |
7540 | target->make_plt_entry(symtab, layout, gsym); | |
7541 | } | |
d8e90251 | 7542 | // Fall through. |
42cacb20 | 7543 | |
3ea0a085 | 7544 | case elfcpp::R_PPC64_REL64: |
dd93cd0a | 7545 | case elfcpp::R_POWERPC_REL32: |
3ea0a085 | 7546 | // Make a dynamic relocation if necessary. |
88b8e639 | 7547 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
3ea0a085 | 7548 | { |
a82bef93 ST |
7549 | if (!parameters->options().output_is_position_independent() |
7550 | && gsym->may_need_copy_reloc()) | |
3ea0a085 AM |
7551 | { |
7552 | target->copy_reloc(symtab, layout, object, | |
7553 | data_shndx, output_section, gsym, | |
7554 | reloc); | |
7555 | } | |
7556 | else | |
7557 | { | |
b3ccdeb5 AM |
7558 | Reloc_section* rela_dyn |
7559 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
3ea0a085 AM |
7560 | check_non_pic(object, r_type); |
7561 | rela_dyn->add_global(gsym, r_type, output_section, object, | |
7562 | data_shndx, reloc.get_r_offset(), | |
7563 | reloc.get_r_addend()); | |
7564 | } | |
7565 | } | |
7566 | break; | |
7567 | ||
ec661b9d AM |
7568 | case elfcpp::R_POWERPC_REL14: |
7569 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
7570 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
b3ccdeb5 | 7571 | if (!is_ifunc) |
0e123f69 AM |
7572 | { |
7573 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7574 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), | |
7575 | r_type, r_sym, reloc.get_r_addend()); | |
7576 | } | |
ec661b9d AM |
7577 | break; |
7578 | ||
7e57d19e AM |
7579 | case elfcpp::R_PPC64_TOCSAVE: |
7580 | // R_PPC64_TOCSAVE follows a call instruction to indicate the | |
7581 | // caller has already saved r2 and thus a plt call stub need not | |
7582 | // save r2. | |
7583 | if (size == 64 | |
7584 | && target->mark_pltcall(ppc_object, data_shndx, | |
7585 | reloc.get_r_offset() - 4, symtab)) | |
7586 | { | |
7587 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); | |
7588 | bool is_ordinary; | |
7589 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7590 | if (!is_ordinary) | |
7591 | object->error(_("tocsave symbol %u has bad shndx %u"), | |
7592 | r_sym, shndx); | |
7593 | else | |
7594 | { | |
7595 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
7596 | target->add_tocsave(ppc_object, shndx, | |
7597 | sym->value() + reloc.get_r_addend()); | |
7598 | } | |
7599 | } | |
7600 | break; | |
7601 | ||
6ce78956 AM |
7602 | case elfcpp::R_POWERPC_REL16: |
7603 | case elfcpp::R_POWERPC_REL16_LO: | |
7604 | case elfcpp::R_POWERPC_REL16_HI: | |
7605 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 7606 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 7607 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a | 7608 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a | 7609 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a | 7610 | case elfcpp::R_POWERPC_SECTOFF_HA: |
f9c6b907 AM |
7611 | case elfcpp::R_PPC64_SECTOFF_DS: |
7612 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
7613 | case elfcpp::R_POWERPC_TPREL16: | |
7614 | case elfcpp::R_POWERPC_TPREL16_LO: | |
7615 | case elfcpp::R_POWERPC_TPREL16_HI: | |
dd93cd0a | 7616 | case elfcpp::R_POWERPC_TPREL16_HA: |
f9c6b907 AM |
7617 | case elfcpp::R_PPC64_TPREL16_DS: |
7618 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
7619 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
7620 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 7621 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
dd93cd0a | 7622 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
dd93cd0a | 7623 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
dd93cd0a | 7624 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
f9c6b907 AM |
7625 | case elfcpp::R_POWERPC_DTPREL16: |
7626 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
7627 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
7628 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
dd93cd0a AM |
7629 | case elfcpp::R_PPC64_DTPREL16_DS: |
7630 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
f9c6b907 AM |
7631 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
7632 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
7633 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
7634 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
7635 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
7636 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
dd93cd0a AM |
7637 | case elfcpp::R_PPC64_TLSGD: |
7638 | case elfcpp::R_PPC64_TLSLD: | |
45965137 | 7639 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
cf43a2fe AM |
7640 | break; |
7641 | ||
42cacb20 DE |
7642 | case elfcpp::R_POWERPC_GOT16: |
7643 | case elfcpp::R_POWERPC_GOT16_LO: | |
7644 | case elfcpp::R_POWERPC_GOT16_HI: | |
7645 | case elfcpp::R_POWERPC_GOT16_HA: | |
dd93cd0a AM |
7646 | case elfcpp::R_PPC64_GOT16_DS: |
7647 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
42cacb20 | 7648 | { |
c9269dff AM |
7649 | // The symbol requires a GOT entry. |
7650 | Output_data_got_powerpc<size, big_endian>* got; | |
42cacb20 DE |
7651 | |
7652 | got = target->got_section(symtab, layout); | |
2e702c99 | 7653 | if (gsym->final_value_is_known()) |
2e702c99 | 7654 | { |
b01a4b04 AM |
7655 | if (is_ifunc |
7656 | && (size == 32 || target->abiversion() >= 2)) | |
e5d5f5ed AM |
7657 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
7658 | else | |
7659 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
7660 | } | |
7661 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) | |
7662 | { | |
7663 | // If we are generating a shared object or a pie, this | |
7664 | // symbol's GOT entry will be set by a dynamic relocation. | |
7665 | unsigned int off = got->add_constant(0); | |
7666 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); | |
7667 | ||
b3ccdeb5 AM |
7668 | Reloc_section* rela_dyn |
7669 | = target->rela_dyn_section(symtab, layout, is_ifunc); | |
7670 | ||
e5d5f5ed | 7671 | if (gsym->can_use_relative_reloc(false) |
9055360d AM |
7672 | && !((size == 32 |
7673 | || target->abiversion() >= 2) | |
e5d5f5ed AM |
7674 | && gsym->visibility() == elfcpp::STV_PROTECTED |
7675 | && parameters->options().shared())) | |
2e702c99 | 7676 | { |
b3ccdeb5 AM |
7677 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
7678 | : elfcpp::R_POWERPC_RELATIVE); | |
e5d5f5ed AM |
7679 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
7680 | } | |
7681 | else | |
7682 | { | |
7683 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; | |
7684 | rela_dyn->add_global(gsym, dynrel, got, off, 0); | |
42cacb20 | 7685 | } |
2e702c99 | 7686 | } |
42cacb20 DE |
7687 | } |
7688 | break; | |
7689 | ||
cf43a2fe AM |
7690 | case elfcpp::R_PPC64_TOC16: |
7691 | case elfcpp::R_PPC64_TOC16_LO: | |
7692 | case elfcpp::R_PPC64_TOC16_HI: | |
7693 | case elfcpp::R_PPC64_TOC16_HA: | |
7694 | case elfcpp::R_PPC64_TOC16_DS: | |
7695 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
42cacb20 DE |
7696 | // We need a GOT section. |
7697 | target->got_section(symtab, layout); | |
7698 | break; | |
7699 | ||
dd93cd0a AM |
7700 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
7701 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7702 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
7703 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7704 | { | |
7705 | const bool final = gsym->final_value_is_known(); | |
7706 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
7707 | if (tls_type == tls::TLSOPT_NONE) | |
7708 | { | |
7709 | Output_data_got_powerpc<size, big_endian>* got | |
7710 | = target->got_section(symtab, layout); | |
b3ccdeb5 AM |
7711 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
7712 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, | |
dd93cd0a AM |
7713 | elfcpp::R_POWERPC_DTPMOD, |
7714 | elfcpp::R_POWERPC_DTPREL); | |
7715 | } | |
7716 | else if (tls_type == tls::TLSOPT_TO_IE) | |
7717 | { | |
acc276d8 AM |
7718 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7719 | { | |
7720 | Output_data_got_powerpc<size, big_endian>* got | |
7721 | = target->got_section(symtab, layout); | |
7722 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7723 | if (gsym->is_undefined() | |
7724 | || gsym->is_from_dynobj()) | |
7725 | { | |
7726 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7727 | elfcpp::R_POWERPC_TPREL); | |
7728 | } | |
7729 | else | |
7730 | { | |
7731 | unsigned int off = got->add_constant(0); | |
7732 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7733 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7734 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7735 | got, off, 0); | |
7736 | } | |
7737 | } | |
dd93cd0a AM |
7738 | } |
7739 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7740 | { | |
7741 | // no GOT relocs needed for Local Exec. | |
7742 | } | |
7743 | else | |
7744 | gold_unreachable(); | |
7745 | } | |
42cacb20 DE |
7746 | break; |
7747 | ||
dd93cd0a AM |
7748 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
7749 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7750 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
7751 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7752 | { | |
7753 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
7754 | if (tls_type == tls::TLSOPT_NONE) | |
7755 | target->tlsld_got_offset(symtab, layout, object); | |
7756 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7757 | { | |
7758 | // no GOT relocs needed for Local Exec. | |
7404fe1b AM |
7759 | if (parameters->options().emit_relocs()) |
7760 | { | |
7761 | Output_section* os = layout->tls_segment()->first_section(); | |
7762 | gold_assert(os != NULL); | |
7763 | os->set_needs_symtab_index(); | |
7764 | } | |
dd93cd0a AM |
7765 | } |
7766 | else | |
7767 | gold_unreachable(); | |
7768 | } | |
7769 | break; | |
7770 | ||
7771 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7772 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7773 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
7774 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7775 | { | |
7776 | Output_data_got_powerpc<size, big_endian>* got | |
7777 | = target->got_section(symtab, layout); | |
bd73a62d AM |
7778 | if (!gsym->final_value_is_known() |
7779 | && (gsym->is_from_dynobj() | |
7780 | || gsym->is_undefined() | |
7781 | || gsym->is_preemptible())) | |
7782 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, | |
7783 | target->rela_dyn_section(layout), | |
7784 | elfcpp::R_POWERPC_DTPREL); | |
7785 | else | |
7786 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); | |
dd93cd0a AM |
7787 | } |
7788 | break; | |
7789 | ||
7790 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7791 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7792 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
7793 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7794 | { | |
7795 | const bool final = gsym->final_value_is_known(); | |
7796 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
7797 | if (tls_type == tls::TLSOPT_NONE) | |
7798 | { | |
acc276d8 AM |
7799 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
7800 | { | |
7801 | Output_data_got_powerpc<size, big_endian>* got | |
7802 | = target->got_section(symtab, layout); | |
7803 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
7804 | if (gsym->is_undefined() | |
7805 | || gsym->is_from_dynobj()) | |
7806 | { | |
7807 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, | |
7808 | elfcpp::R_POWERPC_TPREL); | |
7809 | } | |
7810 | else | |
7811 | { | |
7812 | unsigned int off = got->add_constant(0); | |
7813 | gsym->set_got_offset(GOT_TYPE_TPREL, off); | |
7814 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; | |
7815 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, | |
7816 | got, off, 0); | |
7817 | } | |
7818 | } | |
dd93cd0a AM |
7819 | } |
7820 | else if (tls_type == tls::TLSOPT_TO_LE) | |
7821 | { | |
7822 | // no GOT relocs needed for Local Exec. | |
7823 | } | |
7824 | else | |
7825 | gold_unreachable(); | |
7826 | } | |
42cacb20 DE |
7827 | break; |
7828 | ||
7829 | default: | |
7830 | unsupported_reloc_global(object, r_type, gsym); | |
7831 | break; | |
7832 | } | |
d8f5a274 | 7833 | |
5edad15d AM |
7834 | if (size == 64 |
7835 | && parameters->options().toc_optimize()) | |
7836 | { | |
7837 | if (data_shndx == ppc_object->toc_shndx()) | |
7838 | { | |
7839 | bool ok = true; | |
7840 | if (r_type != elfcpp::R_PPC64_ADDR64 | |
7841 | || (is_ifunc && target->abiversion() < 2)) | |
7842 | ok = false; | |
7843 | else if (parameters->options().output_is_position_independent() | |
7844 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) | |
7845 | ok = false; | |
7846 | if (!ok) | |
7847 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); | |
7848 | } | |
7849 | ||
7850 | enum {no_check, check_lo, check_ha} insn_check; | |
7851 | switch (r_type) | |
7852 | { | |
7853 | default: | |
7854 | insn_check = no_check; | |
7855 | break; | |
7856 | ||
7857 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
7858 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
7859 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
7860 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
7861 | case elfcpp::R_POWERPC_GOT16_HA: | |
7862 | case elfcpp::R_PPC64_TOC16_HA: | |
7863 | insn_check = check_ha; | |
7864 | break; | |
7865 | ||
7866 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
7867 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
7868 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
7869 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
7870 | case elfcpp::R_POWERPC_GOT16_LO: | |
7871 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
7872 | case elfcpp::R_PPC64_TOC16_LO: | |
7873 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7874 | insn_check = check_lo; | |
7875 | break; | |
7876 | } | |
7877 | ||
7878 | section_size_type slen; | |
7879 | const unsigned char* view = NULL; | |
7880 | if (insn_check != no_check) | |
7881 | { | |
7882 | view = ppc_object->section_contents(data_shndx, &slen, false); | |
7883 | section_size_type off = | |
7884 | convert_to_section_size_type(reloc.get_r_offset()) & -4; | |
7885 | if (off < slen) | |
7886 | { | |
7887 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); | |
7888 | if (insn_check == check_lo | |
7889 | ? !ok_lo_toc_insn(insn, r_type) | |
7890 | : ((insn & ((0x3f << 26) | 0x1f << 16)) | |
7891 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) | |
7892 | { | |
7893 | ppc_object->set_no_toc_opt(); | |
7894 | gold_warning(_("%s: toc optimization is not supported " | |
7895 | "for %#08x instruction"), | |
7896 | ppc_object->name().c_str(), insn); | |
7897 | } | |
7898 | } | |
7899 | } | |
7900 | ||
7901 | switch (r_type) | |
7902 | { | |
7903 | default: | |
7904 | break; | |
7905 | case elfcpp::R_PPC64_TOC16: | |
7906 | case elfcpp::R_PPC64_TOC16_LO: | |
7907 | case elfcpp::R_PPC64_TOC16_HI: | |
7908 | case elfcpp::R_PPC64_TOC16_HA: | |
7909 | case elfcpp::R_PPC64_TOC16_DS: | |
7910 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
7911 | if (gsym->source() == Symbol::FROM_OBJECT | |
7912 | && !gsym->object()->is_dynamic()) | |
7913 | { | |
7914 | Powerpc_relobj<size, big_endian>* sym_object | |
7915 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
7916 | bool is_ordinary; | |
7917 | unsigned int shndx = gsym->shndx(&is_ordinary); | |
7918 | if (shndx == sym_object->toc_shndx()) | |
7919 | { | |
7920 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); | |
412294da | 7921 | Address dst_off = sym->value() + reloc.get_r_addend(); |
5edad15d AM |
7922 | if (dst_off < sym_object->section_size(shndx)) |
7923 | { | |
7924 | bool ok = false; | |
7925 | if (r_type == elfcpp::R_PPC64_TOC16_HA) | |
7926 | ok = true; | |
7927 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) | |
7928 | { | |
7929 | // Need to check that the insn is a ld | |
7930 | if (!view) | |
7931 | view = ppc_object->section_contents(data_shndx, | |
7932 | &slen, | |
7933 | false); | |
7934 | section_size_type off = | |
7935 | (convert_to_section_size_type(reloc.get_r_offset()) | |
7936 | + (big_endian ? -2 : 3)); | |
7937 | if (off < slen | |
7938 | && (view[off] & (0x3f << 2)) == (58u << 2)) | |
7939 | ok = true; | |
7940 | } | |
7941 | if (!ok) | |
7942 | sym_object->set_no_toc_opt(dst_off); | |
7943 | } | |
7944 | } | |
7945 | } | |
7946 | break; | |
7947 | } | |
7948 | } | |
7949 | ||
f159cdb6 AM |
7950 | if (size == 32) |
7951 | { | |
7952 | switch (r_type) | |
7953 | { | |
7954 | case elfcpp::R_PPC_LOCAL24PC: | |
7955 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
7956 | gold_error(_("%s: unsupported -mbss-plt code"), | |
7957 | ppc_object->name().c_str()); | |
7958 | break; | |
7959 | default: | |
7960 | break; | |
7961 | } | |
7962 | } | |
7963 | ||
d8f5a274 AM |
7964 | switch (r_type) |
7965 | { | |
7966 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
7967 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
7968 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
7969 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
7970 | case elfcpp::R_POWERPC_GOT16: | |
7971 | case elfcpp::R_PPC64_GOT16_DS: | |
7972 | case elfcpp::R_PPC64_TOC16: | |
7973 | case elfcpp::R_PPC64_TOC16_DS: | |
7974 | ppc_object->set_has_small_toc_reloc(); | |
7975 | default: | |
7976 | break; | |
7977 | } | |
42cacb20 DE |
7978 | } |
7979 | ||
6d03d481 ST |
7980 | // Process relocations for gc. |
7981 | ||
7982 | template<int size, bool big_endian> | |
7983 | void | |
7984 | Target_powerpc<size, big_endian>::gc_process_relocs( | |
d83ce4e3 AM |
7985 | Symbol_table* symtab, |
7986 | Layout* layout, | |
7987 | Sized_relobj_file<size, big_endian>* object, | |
7988 | unsigned int data_shndx, | |
7989 | unsigned int, | |
7990 | const unsigned char* prelocs, | |
7991 | size_t reloc_count, | |
7992 | Output_section* output_section, | |
7993 | bool needs_special_offset_handling, | |
7994 | size_t local_symbol_count, | |
7995 | const unsigned char* plocal_symbols) | |
6d03d481 ST |
7996 | { |
7997 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
7998 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
7999 | Classify_reloc; | |
8000 | ||
e81fea4d AM |
8001 | Powerpc_relobj<size, big_endian>* ppc_object |
8002 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); | |
8003 | if (size == 64) | |
8004 | ppc_object->set_opd_valid(); | |
8005 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) | |
8006 | { | |
8007 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; | |
8008 | for (p = ppc_object->access_from_map()->begin(); | |
8009 | p != ppc_object->access_from_map()->end(); | |
8010 | ++p) | |
8011 | { | |
8012 | Address dst_off = p->first; | |
8013 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
8014 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; | |
8015 | for (s = p->second.begin(); s != p->second.end(); ++s) | |
8016 | { | |
efc6fa12 | 8017 | Relobj* src_obj = s->first; |
e81fea4d AM |
8018 | unsigned int src_indx = s->second; |
8019 | symtab->gc()->add_reference(src_obj, src_indx, | |
8020 | ppc_object, dst_indx); | |
8021 | } | |
8022 | p->second.clear(); | |
8023 | } | |
8024 | ppc_object->access_from_map()->clear(); | |
c6de8ed4 | 8025 | ppc_object->process_gc_mark(symtab); |
e81fea4d AM |
8026 | // Don't look at .opd relocs as .opd will reference everything. |
8027 | return; | |
8028 | } | |
6d03d481 | 8029 | |
4d625b70 | 8030 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
6d03d481 ST |
8031 | symtab, |
8032 | layout, | |
8033 | this, | |
8034 | object, | |
8035 | data_shndx, | |
8036 | prelocs, | |
8037 | reloc_count, | |
8038 | output_section, | |
8039 | needs_special_offset_handling, | |
8040 | local_symbol_count, | |
8041 | plocal_symbols); | |
8042 | } | |
8043 | ||
e81fea4d AM |
8044 | // Handle target specific gc actions when adding a gc reference from |
8045 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX | |
8046 | // and DST_OFF. For powerpc64, this adds a referenc to the code | |
8047 | // section of a function descriptor. | |
8048 | ||
8049 | template<int size, bool big_endian> | |
8050 | void | |
8051 | Target_powerpc<size, big_endian>::do_gc_add_reference( | |
8052 | Symbol_table* symtab, | |
efc6fa12 | 8053 | Relobj* src_obj, |
e81fea4d | 8054 | unsigned int src_shndx, |
efc6fa12 | 8055 | Relobj* dst_obj, |
e81fea4d AM |
8056 | unsigned int dst_shndx, |
8057 | Address dst_off) const | |
8058 | { | |
6c77229c AM |
8059 | if (size != 64 || dst_obj->is_dynamic()) |
8060 | return; | |
8061 | ||
e81fea4d AM |
8062 | Powerpc_relobj<size, big_endian>* ppc_object |
8063 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); | |
a2d7bf59 | 8064 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
8065 | { |
8066 | if (ppc_object->opd_valid()) | |
8067 | { | |
8068 | dst_shndx = ppc_object->get_opd_ent(dst_off); | |
8069 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); | |
8070 | } | |
8071 | else | |
8072 | { | |
8073 | // If we haven't run scan_opd_relocs, we must delay | |
8074 | // processing this function descriptor reference. | |
8075 | ppc_object->add_reference(src_obj, src_shndx, dst_off); | |
8076 | } | |
8077 | } | |
8078 | } | |
8079 | ||
8080 | // Add any special sections for this symbol to the gc work list. | |
8081 | // For powerpc64, this adds the code section of a function | |
8082 | // descriptor. | |
8083 | ||
8084 | template<int size, bool big_endian> | |
8085 | void | |
8086 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( | |
8087 | Symbol_table* symtab, | |
8088 | Symbol* sym) const | |
8089 | { | |
8090 | if (size == 64) | |
8091 | { | |
8092 | Powerpc_relobj<size, big_endian>* ppc_object | |
8093 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); | |
8094 | bool is_ordinary; | |
8095 | unsigned int shndx = sym->shndx(&is_ordinary); | |
a2d7bf59 | 8096 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
e81fea4d AM |
8097 | { |
8098 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); | |
8099 | Address dst_off = gsym->value(); | |
c6de8ed4 AM |
8100 | if (ppc_object->opd_valid()) |
8101 | { | |
8102 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); | |
4277535c RÁE |
8103 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
8104 | dst_indx)); | |
c6de8ed4 AM |
8105 | } |
8106 | else | |
8107 | ppc_object->add_gc_mark(dst_off); | |
e81fea4d AM |
8108 | } |
8109 | } | |
8110 | } | |
8111 | ||
dc3714f3 AM |
8112 | // For a symbol location in .opd, set LOC to the location of the |
8113 | // function entry. | |
8114 | ||
8115 | template<int size, bool big_endian> | |
8116 | void | |
8117 | Target_powerpc<size, big_endian>::do_function_location( | |
8118 | Symbol_location* loc) const | |
8119 | { | |
a2d7bf59 | 8120 | if (size == 64 && loc->shndx != 0) |
dc3714f3 AM |
8121 | { |
8122 | if (loc->object->is_dynamic()) | |
8123 | { | |
8124 | Powerpc_dynobj<size, big_endian>* ppc_object | |
8125 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); | |
8126 | if (loc->shndx == ppc_object->opd_shndx()) | |
8127 | { | |
8128 | Address dest_off; | |
8129 | Address off = loc->offset - ppc_object->opd_address(); | |
8130 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); | |
8131 | loc->offset = dest_off; | |
8132 | } | |
8133 | } | |
8134 | else | |
8135 | { | |
8136 | const Powerpc_relobj<size, big_endian>* ppc_object | |
8137 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); | |
8138 | if (loc->shndx == ppc_object->opd_shndx()) | |
8139 | { | |
8140 | Address dest_off; | |
8141 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); | |
8142 | loc->offset = dest_off; | |
8143 | } | |
8144 | } | |
8145 | } | |
8146 | } | |
8147 | ||
bbec1a5d AM |
8148 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
8149 | // compiled with -fsplit-stack. The function calls non-split-stack | |
8150 | // code. Change the function to ensure it has enough stack space to | |
8151 | // call some random function. | |
8152 | ||
8153 | template<int size, bool big_endian> | |
8154 | void | |
8155 | Target_powerpc<size, big_endian>::do_calls_non_split( | |
8156 | Relobj* object, | |
8157 | unsigned int shndx, | |
8158 | section_offset_type fnoffset, | |
8159 | section_size_type fnsize, | |
6e0813d3 CC |
8160 | const unsigned char* prelocs, |
8161 | size_t reloc_count, | |
bbec1a5d AM |
8162 | unsigned char* view, |
8163 | section_size_type view_size, | |
8164 | std::string* from, | |
8165 | std::string* to) const | |
8166 | { | |
8167 | // 32-bit not supported. | |
8168 | if (size == 32) | |
8169 | { | |
8170 | // warn | |
8171 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, | |
6e0813d3 CC |
8172 | prelocs, reloc_count, view, view_size, |
8173 | from, to); | |
bbec1a5d AM |
8174 | return; |
8175 | } | |
8176 | ||
8177 | // The function always starts with | |
8178 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss | |
8179 | // addis %r12,%r1,-allocate@ha | |
8180 | // addi %r12,%r12,-allocate@l | |
8181 | // cmpld %r12,%r0 | |
8182 | // but note that the addis or addi may be replaced with a nop | |
8183 | ||
8184 | unsigned char *entry = view + fnoffset; | |
8185 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
8186 | ||
8187 | if ((insn & 0xffff0000) == addis_2_12) | |
8188 | { | |
8189 | /* Skip ELFv2 global entry code. */ | |
8190 | entry += 8; | |
8191 | insn = elfcpp::Swap<32, big_endian>::readval(entry); | |
8192 | } | |
8193 | ||
8194 | unsigned char *pinsn = entry; | |
8195 | bool ok = false; | |
8196 | const uint32_t ld_private_ss = 0xe80d8fc0; | |
8197 | if (insn == ld_private_ss) | |
8198 | { | |
8199 | int32_t allocate = 0; | |
8200 | while (1) | |
8201 | { | |
8202 | pinsn += 4; | |
8203 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); | |
8204 | if ((insn & 0xffff0000) == addis_12_1) | |
8205 | allocate += (insn & 0xffff) << 16; | |
8206 | else if ((insn & 0xffff0000) == addi_12_1 | |
8207 | || (insn & 0xffff0000) == addi_12_12) | |
8208 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
8209 | else if (insn != nop) | |
8210 | break; | |
8211 | } | |
8212 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) | |
8213 | { | |
8214 | int extra = parameters->options().split_stack_adjust_size(); | |
8215 | allocate -= extra; | |
8216 | if (allocate >= 0 || extra < 0) | |
8217 | { | |
8218 | object->error(_("split-stack stack size overflow at " | |
8219 | "section %u offset %0zx"), | |
8220 | shndx, static_cast<size_t>(fnoffset)); | |
8221 | return; | |
8222 | } | |
8223 | pinsn = entry + 4; | |
8224 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); | |
8225 | if (insn != addis_12_1) | |
8226 | { | |
8227 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8228 | pinsn += 4; | |
8229 | insn = addi_12_12 | (allocate & 0xffff); | |
8230 | if (insn != addi_12_12) | |
8231 | { | |
8232 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8233 | pinsn += 4; | |
8234 | } | |
8235 | } | |
8236 | else | |
8237 | { | |
8238 | insn = addi_12_1 | (allocate & 0xffff); | |
8239 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); | |
8240 | pinsn += 4; | |
8241 | } | |
8242 | if (pinsn != entry + 12) | |
8243 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); | |
8244 | ||
8245 | ok = true; | |
8246 | } | |
8247 | } | |
8248 | ||
8249 | if (!ok) | |
8250 | { | |
8251 | if (!object->has_no_split_stack()) | |
8252 | object->error(_("failed to match split-stack sequence at " | |
8253 | "section %u offset %0zx"), | |
8254 | shndx, static_cast<size_t>(fnoffset)); | |
8255 | } | |
8256 | } | |
8257 | ||
42cacb20 DE |
8258 | // Scan relocations for a section. |
8259 | ||
8260 | template<int size, bool big_endian> | |
8261 | void | |
8262 | Target_powerpc<size, big_endian>::scan_relocs( | |
d83ce4e3 AM |
8263 | Symbol_table* symtab, |
8264 | Layout* layout, | |
8265 | Sized_relobj_file<size, big_endian>* object, | |
8266 | unsigned int data_shndx, | |
8267 | unsigned int sh_type, | |
8268 | const unsigned char* prelocs, | |
8269 | size_t reloc_count, | |
8270 | Output_section* output_section, | |
8271 | bool needs_special_offset_handling, | |
8272 | size_t local_symbol_count, | |
8273 | const unsigned char* plocal_symbols) | |
42cacb20 DE |
8274 | { |
8275 | typedef Target_powerpc<size, big_endian> Powerpc; | |
4d625b70 CC |
8276 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8277 | Classify_reloc; | |
42cacb20 | 8278 | |
7ee7ff70 AM |
8279 | if (!this->plt_localentry0_init_) |
8280 | { | |
8281 | bool plt_localentry0 = false; | |
8282 | if (size == 64 | |
8283 | && this->abiversion() >= 2) | |
8284 | { | |
8285 | if (parameters->options().user_set_plt_localentry()) | |
8286 | plt_localentry0 = parameters->options().plt_localentry(); | |
d44c746a AM |
8287 | if (plt_localentry0 |
8288 | && symtab->lookup("GLIBC_2.26", NULL) == NULL) | |
8289 | gold_warning(_("--plt-localentry is especially dangerous without " | |
8290 | "ld.so support to detect ABI violations")); | |
7ee7ff70 AM |
8291 | } |
8292 | this->plt_localentry0_ = plt_localentry0; | |
8293 | this->plt_localentry0_init_ = true; | |
8294 | } | |
8295 | ||
42cacb20 DE |
8296 | if (sh_type == elfcpp::SHT_REL) |
8297 | { | |
8298 | gold_error(_("%s: unsupported REL reloc section"), | |
8299 | object->name().c_str()); | |
8300 | return; | |
8301 | } | |
8302 | ||
4d625b70 | 8303 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
42cacb20 DE |
8304 | symtab, |
8305 | layout, | |
8306 | this, | |
8307 | object, | |
8308 | data_shndx, | |
8309 | prelocs, | |
8310 | reloc_count, | |
8311 | output_section, | |
8312 | needs_special_offset_handling, | |
8313 | local_symbol_count, | |
8314 | plocal_symbols); | |
8315 | } | |
8316 | ||
ec4dbad3 AM |
8317 | // Functor class for processing the global symbol table. |
8318 | // Removes symbols defined on discarded opd entries. | |
8319 | ||
8320 | template<bool big_endian> | |
8321 | class Global_symbol_visitor_opd | |
8322 | { | |
8323 | public: | |
8324 | Global_symbol_visitor_opd() | |
8325 | { } | |
8326 | ||
8327 | void | |
8328 | operator()(Sized_symbol<64>* sym) | |
8329 | { | |
8330 | if (sym->has_symtab_index() | |
8331 | || sym->source() != Symbol::FROM_OBJECT | |
8332 | || !sym->in_real_elf()) | |
8333 | return; | |
8334 | ||
6c77229c AM |
8335 | if (sym->object()->is_dynamic()) |
8336 | return; | |
8337 | ||
ec4dbad3 AM |
8338 | Powerpc_relobj<64, big_endian>* symobj |
8339 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); | |
6c77229c | 8340 | if (symobj->opd_shndx() == 0) |
ec4dbad3 AM |
8341 | return; |
8342 | ||
8343 | bool is_ordinary; | |
8344 | unsigned int shndx = sym->shndx(&is_ordinary); | |
8345 | if (shndx == symobj->opd_shndx() | |
8346 | && symobj->get_opd_discard(sym->value())) | |
1611bc4a AM |
8347 | { |
8348 | sym->set_undefined(); | |
e3ee8ed4 | 8349 | sym->set_visibility(elfcpp::STV_DEFAULT); |
1611bc4a AM |
8350 | sym->set_is_defined_in_discarded_section(); |
8351 | sym->set_symtab_index(-1U); | |
8352 | } | |
ec4dbad3 AM |
8353 | } |
8354 | }; | |
8355 | ||
f3a0ed29 AM |
8356 | template<int size, bool big_endian> |
8357 | void | |
8358 | Target_powerpc<size, big_endian>::define_save_restore_funcs( | |
8359 | Layout* layout, | |
8360 | Symbol_table* symtab) | |
8361 | { | |
8362 | if (size == 64) | |
8363 | { | |
d49044c7 AM |
8364 | Output_data_save_res<size, big_endian>* savres |
8365 | = new Output_data_save_res<size, big_endian>(symtab); | |
8366 | this->savres_section_ = savres; | |
f3a0ed29 AM |
8367 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
8368 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, | |
8369 | savres, ORDER_TEXT, false); | |
8370 | } | |
8371 | } | |
8372 | ||
d8f5a274 AM |
8373 | // Sort linker created .got section first (for the header), then input |
8374 | // sections belonging to files using small model code. | |
8375 | ||
8376 | template<bool big_endian> | |
8377 | class Sort_toc_sections | |
8378 | { | |
8379 | public: | |
8380 | bool | |
8381 | operator()(const Output_section::Input_section& is1, | |
8382 | const Output_section::Input_section& is2) const | |
8383 | { | |
8384 | if (!is1.is_input_section() && is2.is_input_section()) | |
8385 | return true; | |
8386 | bool small1 | |
8387 | = (is1.is_input_section() | |
8388 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) | |
8389 | ->has_small_toc_reloc())); | |
8390 | bool small2 | |
8391 | = (is2.is_input_section() | |
8392 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) | |
8393 | ->has_small_toc_reloc())); | |
8394 | return small1 && !small2; | |
8395 | } | |
8396 | }; | |
8397 | ||
42cacb20 DE |
8398 | // Finalize the sections. |
8399 | ||
8400 | template<int size, bool big_endian> | |
8401 | void | |
d5b40221 DK |
8402 | Target_powerpc<size, big_endian>::do_finalize_sections( |
8403 | Layout* layout, | |
724436fc | 8404 | const Input_objects* input_objects, |
ec4dbad3 | 8405 | Symbol_table* symtab) |
42cacb20 | 8406 | { |
c9824451 AM |
8407 | if (parameters->doing_static_link()) |
8408 | { | |
8409 | // At least some versions of glibc elf-init.o have a strong | |
8410 | // reference to __rela_iplt marker syms. A weak ref would be | |
8411 | // better.. | |
8412 | if (this->iplt_ != NULL) | |
8413 | { | |
8414 | Reloc_section* rel = this->iplt_->rel_plt(); | |
8415 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
8416 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8417 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8418 | elfcpp::STV_HIDDEN, 0, false, true); | |
8419 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
8420 | Symbol_table::PREDEFINED, rel, 0, 0, | |
8421 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8422 | elfcpp::STV_HIDDEN, 0, true, true); | |
8423 | } | |
8424 | else | |
8425 | { | |
8426 | symtab->define_as_constant("__rela_iplt_start", NULL, | |
8427 | Symbol_table::PREDEFINED, 0, 0, | |
8428 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8429 | elfcpp::STV_HIDDEN, 0, true, false); | |
8430 | symtab->define_as_constant("__rela_iplt_end", NULL, | |
8431 | Symbol_table::PREDEFINED, 0, 0, | |
8432 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
8433 | elfcpp::STV_HIDDEN, 0, true, false); | |
8434 | } | |
8435 | } | |
8436 | ||
ec4dbad3 AM |
8437 | if (size == 64) |
8438 | { | |
8439 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; | |
8440 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); | |
ec661b9d AM |
8441 | |
8442 | if (!parameters->options().relocatable()) | |
8443 | { | |
8444 | this->define_save_restore_funcs(layout, symtab); | |
8445 | ||
8446 | // Annoyingly, we need to make these sections now whether or | |
8447 | // not we need them. If we delay until do_relax then we | |
8448 | // need to mess with the relaxation machinery checkpointing. | |
8449 | this->got_section(symtab, layout); | |
8450 | this->make_brlt_section(layout); | |
d8f5a274 AM |
8451 | |
8452 | if (parameters->options().toc_sort()) | |
8453 | { | |
8454 | Output_section* os = this->got_->output_section(); | |
8455 | if (os != NULL && os->input_sections().size() > 1) | |
8456 | std::stable_sort(os->input_sections().begin(), | |
8457 | os->input_sections().end(), | |
8458 | Sort_toc_sections<big_endian>()); | |
8459 | } | |
ec661b9d | 8460 | } |
ec4dbad3 AM |
8461 | } |
8462 | ||
42cacb20 | 8463 | // Fill in some more dynamic tags. |
c9269dff | 8464 | Output_data_dynamic* odyn = layout->dynamic_data(); |
c9824451 | 8465 | if (odyn != NULL) |
cf43a2fe | 8466 | { |
c9824451 AM |
8467 | const Reloc_section* rel_plt = (this->plt_ == NULL |
8468 | ? NULL | |
8469 | : this->plt_->rel_plt()); | |
8470 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, | |
8471 | this->rela_dyn_, true, size == 32); | |
8472 | ||
8473 | if (size == 32) | |
dd93cd0a | 8474 | { |
c9824451 AM |
8475 | if (this->got_ != NULL) |
8476 | { | |
8477 | this->got_->finalize_data_size(); | |
8478 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, | |
8479 | this->got_, this->got_->g_o_t()); | |
8480 | } | |
34e0882b AM |
8481 | if (this->has_tls_get_addr_opt_) |
8482 | odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS); | |
dd93cd0a | 8483 | } |
c9824451 | 8484 | else |
dd93cd0a | 8485 | { |
c9824451 AM |
8486 | if (this->glink_ != NULL) |
8487 | { | |
8488 | this->glink_->finalize_data_size(); | |
8489 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, | |
8490 | this->glink_, | |
9e390558 | 8491 | (this->glink_->pltresolve_size() |
c9824451 AM |
8492 | - 32)); |
8493 | } | |
34e0882b | 8494 | if (this->has_localentry0_ || this->has_tls_get_addr_opt_) |
7ee7ff70 | 8495 | odyn->add_constant(elfcpp::DT_PPC64_OPT, |
34e0882b AM |
8496 | ((this->has_localentry0_ |
8497 | ? elfcpp::PPC64_OPT_LOCALENTRY : 0) | |
8498 | | (this->has_tls_get_addr_opt_ | |
8499 | ? elfcpp::PPC64_OPT_TLS : 0))); | |
dd93cd0a | 8500 | } |
c9269dff | 8501 | } |
cf43a2fe | 8502 | |
42cacb20 DE |
8503 | // Emit any relocs we saved in an attempt to avoid generating COPY |
8504 | // relocs. | |
8505 | if (this->copy_relocs_.any_saved_relocs()) | |
8506 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
724436fc AM |
8507 | |
8508 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
8509 | p != input_objects->relobj_end(); | |
8510 | ++p) | |
8511 | { | |
8512 | Powerpc_relobj<size, big_endian>* ppc_relobj | |
8513 | = static_cast<Powerpc_relobj<size, big_endian>*>(*p); | |
8514 | if (ppc_relobj->attributes_section_data()) | |
8515 | this->merge_object_attributes(ppc_relobj->name().c_str(), | |
8516 | ppc_relobj->attributes_section_data()); | |
8517 | } | |
8518 | for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); | |
8519 | p != input_objects->dynobj_end(); | |
8520 | ++p) | |
8521 | { | |
8522 | Powerpc_dynobj<size, big_endian>* ppc_dynobj | |
8523 | = static_cast<Powerpc_dynobj<size, big_endian>*>(*p); | |
8524 | if (ppc_dynobj->attributes_section_data()) | |
8525 | this->merge_object_attributes(ppc_dynobj->name().c_str(), | |
8526 | ppc_dynobj->attributes_section_data()); | |
8527 | } | |
8528 | ||
8529 | // Create a .gnu.attributes section if we have merged any attributes | |
8530 | // from inputs. | |
8531 | if (this->attributes_section_data_ != NULL | |
8532 | && this->attributes_section_data_->size() != 0) | |
8533 | { | |
8534 | Output_attributes_section_data* attributes_section | |
8535 | = new Output_attributes_section_data(*this->attributes_section_data_); | |
8536 | layout->add_output_section_data(".gnu.attributes", | |
8537 | elfcpp::SHT_GNU_ATTRIBUTES, 0, | |
8538 | attributes_section, ORDER_INVALID, false); | |
8539 | } | |
8540 | } | |
8541 | ||
8542 | // Merge object attributes from input file called NAME with those of the | |
8543 | // output. The input object attributes are in the object pointed by PASD. | |
8544 | ||
8545 | template<int size, bool big_endian> | |
8546 | void | |
8547 | Target_powerpc<size, big_endian>::merge_object_attributes( | |
8548 | const char* name, | |
8549 | const Attributes_section_data* pasd) | |
8550 | { | |
8551 | // Return if there is no attributes section data. | |
8552 | if (pasd == NULL) | |
8553 | return; | |
8554 | ||
8555 | // Create output object attributes. | |
8556 | if (this->attributes_section_data_ == NULL) | |
8557 | this->attributes_section_data_ = new Attributes_section_data(NULL, 0); | |
8558 | ||
8559 | const int vendor = Object_attribute::OBJ_ATTR_GNU; | |
8560 | const Object_attribute* in_attr = pasd->known_attributes(vendor); | |
8561 | Object_attribute* out_attr | |
8562 | = this->attributes_section_data_->known_attributes(vendor); | |
8563 | ||
8564 | const char* err; | |
8565 | const char* first; | |
8566 | const char* second; | |
8567 | int tag = elfcpp::Tag_GNU_Power_ABI_FP; | |
8568 | int in_fp = in_attr[tag].int_value() & 0xf; | |
8569 | int out_fp = out_attr[tag].int_value() & 0xf; | |
8570 | if (in_fp != out_fp) | |
8571 | { | |
8572 | err = NULL; | |
8573 | if ((in_fp & 3) == 0) | |
8574 | ; | |
8575 | else if ((out_fp & 3) == 0) | |
8576 | { | |
8577 | out_fp |= in_fp & 3; | |
8578 | out_attr[tag].set_int_value(out_fp); | |
8579 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); | |
8580 | this->last_fp_ = name; | |
8581 | } | |
8582 | else if ((out_fp & 3) != 2 && (in_fp & 3) == 2) | |
8583 | { | |
8584 | err = N_("%s uses hard float, %s uses soft float"); | |
8585 | first = this->last_fp_; | |
8586 | second = name; | |
8587 | } | |
8588 | else if ((out_fp & 3) == 2 && (in_fp & 3) != 2) | |
8589 | { | |
8590 | err = N_("%s uses hard float, %s uses soft float"); | |
8591 | first = name; | |
8592 | second = this->last_fp_; | |
8593 | } | |
8594 | else if ((out_fp & 3) == 1 && (in_fp & 3) == 3) | |
8595 | { | |
8596 | err = N_("%s uses double-precision hard float, " | |
8597 | "%s uses single-precision hard float"); | |
8598 | first = this->last_fp_; | |
8599 | second = name; | |
8600 | } | |
8601 | else if ((out_fp & 3) == 3 && (in_fp & 3) == 1) | |
8602 | { | |
8603 | err = N_("%s uses double-precision hard float, " | |
8604 | "%s uses single-precision hard float"); | |
8605 | first = name; | |
8606 | second = this->last_fp_; | |
8607 | } | |
8608 | ||
8609 | if (err || (in_fp & 0xc) == 0) | |
8610 | ; | |
8611 | else if ((out_fp & 0xc) == 0) | |
8612 | { | |
8613 | out_fp |= in_fp & 0xc; | |
8614 | out_attr[tag].set_int_value(out_fp); | |
8615 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); | |
8616 | this->last_ld_ = name; | |
8617 | } | |
8618 | else if ((out_fp & 0xc) != 2 * 4 && (in_fp & 0xc) == 2 * 4) | |
8619 | { | |
8620 | err = N_("%s uses 64-bit long double, %s uses 128-bit long double"); | |
8621 | first = name; | |
8622 | second = this->last_ld_; | |
8623 | } | |
8624 | else if ((in_fp & 0xc) != 2 * 4 && (out_fp & 0xc) == 2 * 4) | |
8625 | { | |
8626 | err = N_("%s uses 64-bit long double, %s uses 128-bit long double"); | |
8627 | first = this->last_ld_; | |
8628 | second = name; | |
8629 | } | |
8630 | else if ((out_fp & 0xc) == 1 * 4 && (in_fp & 0xc) == 3 * 4) | |
8631 | { | |
8632 | err = N_("%s uses IBM long double, %s uses IEEE long double"); | |
8633 | first = this->last_ld_; | |
8634 | second = name; | |
8635 | } | |
8636 | else if ((out_fp & 0xc) == 3 * 4 && (in_fp & 0xc) == 1 * 4) | |
8637 | { | |
8638 | err = N_("%s uses IBM long double, %s uses IEEE long double"); | |
8639 | first = name; | |
8640 | second = this->last_ld_; | |
8641 | } | |
8642 | ||
8643 | if (err) | |
8644 | { | |
8645 | if (parameters->options().warn_mismatch()) | |
8646 | gold_error(_(err), first, second); | |
8647 | // Arrange for this attribute to be deleted. It's better to | |
8648 | // say "don't know" about a file than to wrongly claim compliance. | |
8649 | out_attr[tag].set_type(0); | |
8650 | } | |
8651 | } | |
8652 | ||
8653 | if (size == 32) | |
8654 | { | |
8655 | tag = elfcpp::Tag_GNU_Power_ABI_Vector; | |
8656 | int in_vec = in_attr[tag].int_value() & 3; | |
8657 | int out_vec = out_attr[tag].int_value() & 3; | |
8658 | if (in_vec != out_vec) | |
8659 | { | |
8660 | err = NULL; | |
8661 | if (in_vec == 0) | |
8662 | ; | |
8663 | else if (out_vec == 0) | |
8664 | { | |
8665 | out_vec = in_vec; | |
8666 | out_attr[tag].set_int_value(out_vec); | |
8667 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); | |
8668 | this->last_vec_ = name; | |
8669 | } | |
8670 | // For now, allow generic to transition to AltiVec or SPE | |
8671 | // without a warning. If GCC marked files with their stack | |
8672 | // alignment and used don't-care markings for files which are | |
8673 | // not affected by the vector ABI, we could warn about this | |
8674 | // case too. */ | |
8675 | else if (in_vec == 1) | |
8676 | ; | |
8677 | else if (out_vec == 1) | |
8678 | { | |
8679 | out_vec = in_vec; | |
8680 | out_attr[tag].set_int_value(out_vec); | |
8681 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); | |
8682 | this->last_vec_ = name; | |
8683 | } | |
8684 | else if (out_vec < in_vec) | |
8685 | { | |
8686 | err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI"); | |
8687 | first = this->last_vec_; | |
8688 | second = name; | |
8689 | } | |
8690 | else if (out_vec > in_vec) | |
8691 | { | |
8692 | err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI"); | |
8693 | first = name; | |
8694 | second = this->last_vec_; | |
8695 | } | |
8696 | if (err) | |
8697 | { | |
8698 | if (parameters->options().warn_mismatch()) | |
8699 | gold_error(_(err), first, second); | |
8700 | out_attr[tag].set_type(0); | |
8701 | } | |
8702 | } | |
8703 | ||
8704 | tag = elfcpp::Tag_GNU_Power_ABI_Struct_Return; | |
8705 | int in_struct = in_attr[tag].int_value() & 3; | |
8706 | int out_struct = out_attr[tag].int_value() & 3; | |
8707 | if (in_struct != out_struct) | |
8708 | { | |
8709 | err = NULL; | |
8710 | if (in_struct == 0 || in_struct == 3) | |
8711 | ; | |
8712 | else if (out_struct == 0) | |
8713 | { | |
8714 | out_struct = in_struct; | |
8715 | out_attr[tag].set_int_value(out_struct); | |
8716 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); | |
8717 | this->last_struct_ = name; | |
8718 | } | |
8719 | else if (out_struct < in_struct) | |
8720 | { | |
8721 | err = N_("%s uses r3/r4 for small structure returns, " | |
8722 | "%s uses memory"); | |
8723 | first = this->last_struct_; | |
8724 | second = name; | |
8725 | } | |
8726 | else if (out_struct > in_struct) | |
8727 | { | |
8728 | err = N_("%s uses r3/r4 for small structure returns, " | |
8729 | "%s uses memory"); | |
8730 | first = name; | |
8731 | second = this->last_struct_; | |
8732 | } | |
8733 | if (err) | |
8734 | { | |
8735 | if (parameters->options().warn_mismatch()) | |
8736 | gold_error(_(err), first, second); | |
8737 | out_attr[tag].set_type(0); | |
8738 | } | |
8739 | } | |
8740 | } | |
8741 | ||
8742 | // Merge Tag_compatibility attributes and any common GNU ones. | |
8743 | this->attributes_section_data_->merge(name, pasd); | |
42cacb20 DE |
8744 | } |
8745 | ||
5edad15d AM |
8746 | // Emit any saved relocs, and mark toc entries using any of these |
8747 | // relocs as not optimizable. | |
aba6bc71 | 8748 | |
5edad15d AM |
8749 | template<int sh_type, int size, bool big_endian> |
8750 | void | |
8751 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( | |
8752 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) | |
aba6bc71 | 8753 | { |
5edad15d AM |
8754 | if (size == 64 |
8755 | && parameters->options().toc_optimize()) | |
8756 | { | |
8757 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
8758 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
8759 | p != this->entries_.end(); | |
8760 | ++p) | |
8761 | { | |
8762 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& | |
8763 | entry = *p; | |
8764 | ||
8765 | // If the symbol is no longer defined in a dynamic object, | |
8766 | // then we emitted a COPY relocation. If it is still | |
8767 | // dynamic then we'll need dynamic relocations and thus | |
8768 | // can't optimize toc entries. | |
8769 | if (entry.sym_->is_from_dynobj()) | |
8770 | { | |
8771 | Powerpc_relobj<size, big_endian>* ppc_object | |
8772 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); | |
8773 | if (entry.shndx_ == ppc_object->toc_shndx()) | |
8774 | ppc_object->set_no_toc_opt(entry.address_); | |
8775 | } | |
8776 | } | |
8777 | } | |
8778 | ||
8779 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); | |
aba6bc71 AM |
8780 | } |
8781 | ||
3ea0a085 AM |
8782 | // Return the value to use for a branch relocation. |
8783 | ||
8784 | template<int size, bool big_endian> | |
1611bc4a | 8785 | bool |
3ea0a085 | 8786 | Target_powerpc<size, big_endian>::symval_for_branch( |
6c77229c | 8787 | const Symbol_table* symtab, |
3ea0a085 AM |
8788 | const Sized_symbol<size>* gsym, |
8789 | Powerpc_relobj<size, big_endian>* object, | |
1611bc4a | 8790 | Address *value, |
3ea0a085 AM |
8791 | unsigned int *dest_shndx) |
8792 | { | |
9055360d AM |
8793 | if (size == 32 || this->abiversion() >= 2) |
8794 | gold_unreachable(); | |
3ea0a085 | 8795 | *dest_shndx = 0; |
3ea0a085 AM |
8796 | |
8797 | // If the symbol is defined in an opd section, ie. is a function | |
8798 | // descriptor, use the function descriptor code entry address | |
8799 | Powerpc_relobj<size, big_endian>* symobj = object; | |
f3a0ed29 | 8800 | if (gsym != NULL |
0e123f69 AM |
8801 | && (gsym->source() != Symbol::FROM_OBJECT |
8802 | || gsym->object()->is_dynamic())) | |
1611bc4a | 8803 | return true; |
3ea0a085 AM |
8804 | if (gsym != NULL) |
8805 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); | |
8806 | unsigned int shndx = symobj->opd_shndx(); | |
8807 | if (shndx == 0) | |
1611bc4a | 8808 | return true; |
3ea0a085 | 8809 | Address opd_addr = symobj->get_output_section_offset(shndx); |
a2d7bf59 | 8810 | if (opd_addr == invalid_address) |
1611bc4a | 8811 | return true; |
c6905c28 | 8812 | opd_addr += symobj->output_section_address(shndx); |
1611bc4a | 8813 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
3ea0a085 AM |
8814 | { |
8815 | Address sec_off; | |
1611bc4a | 8816 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
6c77229c AM |
8817 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
8818 | { | |
8819 | Section_id folded | |
8820 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); | |
8821 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); | |
8822 | *dest_shndx = folded.second; | |
8823 | } | |
3ea0a085 | 8824 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
1611bc4a AM |
8825 | if (sec_addr == invalid_address) |
8826 | return false; | |
8827 | ||
3ea0a085 | 8828 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
1611bc4a | 8829 | *value = sec_addr + sec_off; |
3ea0a085 | 8830 | } |
1611bc4a | 8831 | return true; |
3ea0a085 AM |
8832 | } |
8833 | ||
42cacb20 DE |
8834 | // Perform a relocation. |
8835 | ||
8836 | template<int size, bool big_endian> | |
8837 | inline bool | |
8838 | Target_powerpc<size, big_endian>::Relocate::relocate( | |
d83ce4e3 | 8839 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 8840 | unsigned int, |
d83ce4e3 AM |
8841 | Target_powerpc* target, |
8842 | Output_section* os, | |
8843 | size_t relnum, | |
91a65d2f | 8844 | const unsigned char* preloc, |
d83ce4e3 AM |
8845 | const Sized_symbol<size>* gsym, |
8846 | const Symbol_value<size>* psymval, | |
8847 | unsigned char* view, | |
c9269dff AM |
8848 | Address address, |
8849 | section_size_type view_size) | |
42cacb20 | 8850 | { |
23cedd1d AM |
8851 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
8852 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; | |
8853 | typedef typename elfcpp::Rela<size, big_endian> Reltype; | |
8854 | ||
0e804863 ILT |
8855 | if (view == NULL) |
8856 | return true; | |
8857 | ||
34e0882b AM |
8858 | if (target->replace_tls_get_addr(gsym)) |
8859 | gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt()); | |
8860 | ||
91a65d2f AM |
8861 | const elfcpp::Rela<size, big_endian> rela(preloc); |
8862 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
34e0882b | 8863 | switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym)) |
dd93cd0a | 8864 | { |
e3deeb9c AM |
8865 | case Track_tls::NOT_EXPECTED: |
8866 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
8867 | _("__tls_get_addr call lacks marker reloc")); | |
8868 | break; | |
8869 | case Track_tls::EXPECTED: | |
8870 | // We have already complained. | |
8871 | break; | |
8872 | case Track_tls::SKIP: | |
23cedd1d AM |
8873 | if (is_plt16_reloc<size>(r_type) |
8874 | || r_type == elfcpp::R_POWERPC_PLTSEQ) | |
8875 | { | |
8876 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8877 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
8878 | } | |
8879 | else if (size == 64 && r_type == elfcpp::R_POWERPC_PLTCALL) | |
8880 | { | |
8881 | Insn* iview = reinterpret_cast<Insn*>(view); | |
8882 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, nop); | |
8883 | } | |
e3deeb9c AM |
8884 | return true; |
8885 | case Track_tls::NORMAL: | |
8886 | break; | |
dd93cd0a | 8887 | } |
dd93cd0a | 8888 | |
dcfc7dd4 AM |
8889 | // Offset from start of insn to d-field reloc. |
8890 | const int d_offset = big_endian ? 2 : 0; | |
8891 | ||
3ea0a085 AM |
8892 | Powerpc_relobj<size, big_endian>* const object |
8893 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
dd93cd0a | 8894 | Address value = 0; |
0cfb0717 | 8895 | bool has_stub_value = false; |
7ee7ff70 | 8896 | bool localentry0 = false; |
e5d5f5ed | 8897 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
08be3224 AM |
8898 | bool has_plt_offset |
8899 | = (gsym != NULL | |
88b8e639 | 8900 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
08be3224 AM |
8901 | : object->local_has_plt_offset(r_sym)); |
8902 | if (has_plt_offset | |
8903 | && !is_plt16_reloc<size>(r_type) | |
23cedd1d AM |
8904 | && r_type != elfcpp::R_POWERPC_PLTSEQ |
8905 | && r_type != elfcpp::R_POWERPC_PLTCALL | |
b3ccdeb5 | 8906 | && (!psymval->is_ifunc_symbol() |
9055360d | 8907 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
dd93cd0a | 8908 | { |
9055360d AM |
8909 | if (size == 64 |
8910 | && gsym != NULL | |
8911 | && target->abiversion() >= 2 | |
8912 | && !parameters->options().output_is_position_independent() | |
8913 | && !is_branch_reloc(r_type)) | |
ec661b9d | 8914 | { |
faa2211d AM |
8915 | Address off = target->glink_section()->find_global_entry(gsym); |
8916 | if (off != invalid_address) | |
6ec65f28 AM |
8917 | { |
8918 | value = target->glink_section()->global_entry_address() + off; | |
8919 | has_stub_value = true; | |
8920 | } | |
ec661b9d | 8921 | } |
c9824451 | 8922 | else |
9055360d | 8923 | { |
64b5d6d7 AM |
8924 | Stub_table<size, big_endian>* stub_table = NULL; |
8925 | if (target->stub_tables().size() == 1) | |
8926 | stub_table = target->stub_tables()[0]; | |
8927 | if (stub_table == NULL | |
8928 | && !(size == 32 | |
8929 | && gsym != NULL | |
8930 | && !parameters->options().output_is_position_independent() | |
8931 | && !is_branch_reloc(r_type))) | |
8932 | stub_table = object->stub_table(relinfo->data_shndx); | |
9055360d AM |
8933 | if (stub_table == NULL) |
8934 | { | |
64b5d6d7 AM |
8935 | // This is a ref from a data section to an ifunc symbol, |
8936 | // or a non-branch reloc for which we always want to use | |
8937 | // one set of stubs for resolving function addresses. | |
9055360d AM |
8938 | if (target->stub_tables().size() != 0) |
8939 | stub_table = target->stub_tables()[0]; | |
8940 | } | |
faa2211d AM |
8941 | if (stub_table != NULL) |
8942 | { | |
7e57d19e | 8943 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
faa2211d | 8944 | if (gsym != NULL) |
7e57d19e | 8945 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
faa2211d AM |
8946 | rela.get_r_addend()); |
8947 | else | |
7e57d19e | 8948 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
faa2211d | 8949 | rela.get_r_addend()); |
7e57d19e | 8950 | if (ent != NULL) |
faa2211d | 8951 | { |
7e57d19e AM |
8952 | value = stub_table->stub_address() + ent->off_; |
8953 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
8954 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
8955 | size_t reloc_count = shdr.get_sh_size() / reloc_size; | |
8956 | if (size == 64 | |
8957 | && ent->r2save_ | |
8958 | && relnum + 1 < reloc_count) | |
8959 | { | |
8960 | Reltype next_rela(preloc + reloc_size); | |
8961 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) | |
8962 | == elfcpp::R_PPC64_TOCSAVE | |
8963 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) | |
8964 | value += 4; | |
8965 | } | |
7ee7ff70 | 8966 | localentry0 = ent->localentry0_; |
faa2211d AM |
8967 | has_stub_value = true; |
8968 | } | |
8969 | } | |
9055360d | 8970 | } |
faa2211d AM |
8971 | // We don't care too much about bogus debug references to |
8972 | // non-local functions, but otherwise there had better be a plt | |
8973 | // call stub or global entry stub as appropriate. | |
8974 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); | |
dd93cd0a | 8975 | } |
cf43a2fe | 8976 | |
08be3224 AM |
8977 | if (has_plt_offset && is_plt16_reloc<size>(r_type)) |
8978 | { | |
8979 | const Output_data_plt_powerpc<size, big_endian>* plt; | |
8980 | if (gsym) | |
8981 | value = target->plt_off(gsym, &plt); | |
8982 | else | |
8983 | value = target->plt_off(object, r_sym, &plt); | |
8984 | value += plt->address(); | |
8985 | ||
8986 | if (size == 64) | |
8987 | value -= (target->got_section()->output_section()->address() | |
8988 | + object->toc_base_offset()); | |
8989 | else if (parameters->options().output_is_position_independent()) | |
8990 | { | |
8991 | if (rela.get_r_addend() >= 32768) | |
8992 | { | |
8993 | unsigned int got2 = object->got2_shndx(); | |
8994 | value -= (object->get_output_section_offset(got2) | |
8995 | + object->output_section(got2)->address() | |
8996 | + rela.get_r_addend()); | |
8997 | } | |
8998 | else | |
8999 | value -= (target->got_section()->address() | |
9000 | + target->got_section()->g_o_t()); | |
9001 | } | |
9002 | } | |
23cedd1d AM |
9003 | else if (!has_plt_offset |
9004 | && (is_plt16_reloc<size>(r_type) | |
9005 | || r_type == elfcpp::R_POWERPC_PLTSEQ)) | |
9006 | { | |
9007 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9008 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9009 | r_type = elfcpp::R_POWERPC_NONE; | |
9010 | } | |
08be3224 AM |
9011 | else if (r_type == elfcpp::R_POWERPC_GOT16 |
9012 | || r_type == elfcpp::R_POWERPC_GOT16_LO | |
9013 | || r_type == elfcpp::R_POWERPC_GOT16_HI | |
9014 | || r_type == elfcpp::R_POWERPC_GOT16_HA | |
9015 | || r_type == elfcpp::R_PPC64_GOT16_DS | |
9016 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS) | |
42cacb20 | 9017 | { |
cf43a2fe AM |
9018 | if (gsym != NULL) |
9019 | { | |
9020 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
9021 | value = gsym->got_offset(GOT_TYPE_STANDARD); | |
9022 | } | |
9023 | else | |
9024 | { | |
cf43a2fe AM |
9025 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
9026 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); | |
9027 | } | |
dd93cd0a | 9028 | value -= target->got_section()->got_base_offset(object); |
cf43a2fe AM |
9029 | } |
9030 | else if (r_type == elfcpp::R_PPC64_TOC) | |
9031 | { | |
c9269dff | 9032 | value = (target->got_section()->output_section()->address() |
dd93cd0a | 9033 | + object->toc_base_offset()); |
cf43a2fe AM |
9034 | } |
9035 | else if (gsym != NULL | |
9036 | && (r_type == elfcpp::R_POWERPC_REL24 | |
9037 | || r_type == elfcpp::R_PPC_PLTREL24) | |
0cfb0717 | 9038 | && has_stub_value) |
cf43a2fe | 9039 | { |
c9269dff AM |
9040 | if (size == 64) |
9041 | { | |
9042 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
9043 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
34e0882b AM |
9044 | bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym); |
9045 | if (!can_plt_call && rela.get_r_offset() + 8 <= view_size) | |
c9269dff | 9046 | { |
3ea0a085 | 9047 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
c9269dff | 9048 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
3ea0a085 AM |
9049 | if ((insn & 1) != 0 |
9050 | && (insn2 == nop | |
9051 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) | |
c9269dff | 9052 | { |
b4f7960d AM |
9053 | elfcpp::Swap<32, big_endian>:: |
9054 | writeval(wv + 1, ld_2_1 + target->stk_toc()); | |
c9269dff AM |
9055 | can_plt_call = true; |
9056 | } | |
9057 | } | |
9058 | if (!can_plt_call) | |
3ea0a085 AM |
9059 | { |
9060 | // If we don't have a branch and link followed by a nop, | |
9061 | // we can't go via the plt because there is no place to | |
9062 | // put a toc restoring instruction. | |
9063 | // Unless we know we won't be returning. | |
9064 | if (strcmp(gsym->name(), "__libc_start_main") == 0) | |
9065 | can_plt_call = true; | |
9066 | } | |
9067 | if (!can_plt_call) | |
9068 | { | |
ba8ca3e7 AM |
9069 | // g++ as of 20130507 emits self-calls without a |
9070 | // following nop. This is arguably wrong since we have | |
9071 | // conflicting information. On the one hand a global | |
9072 | // symbol and on the other a local call sequence, but | |
9073 | // don't error for this special case. | |
9074 | // It isn't possible to cheaply verify we have exactly | |
9075 | // such a call. Allow all calls to the same section. | |
3ea0a085 | 9076 | bool ok = false; |
c9824451 | 9077 | Address code = value; |
3ea0a085 AM |
9078 | if (gsym->source() == Symbol::FROM_OBJECT |
9079 | && gsym->object() == object) | |
9080 | { | |
9055360d AM |
9081 | unsigned int dest_shndx = 0; |
9082 | if (target->abiversion() < 2) | |
9083 | { | |
9084 | Address addend = rela.get_r_addend(); | |
1611bc4a AM |
9085 | code = psymval->value(object, addend); |
9086 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
9087 | &code, &dest_shndx); | |
9055360d | 9088 | } |
3ea0a085 AM |
9089 | bool is_ordinary; |
9090 | if (dest_shndx == 0) | |
9091 | dest_shndx = gsym->shndx(&is_ordinary); | |
9092 | ok = dest_shndx == relinfo->data_shndx; | |
9093 | } | |
9094 | if (!ok) | |
c9824451 AM |
9095 | { |
9096 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
9097 | _("call lacks nop, can't restore toc; " | |
9098 | "recompile with -fPIC")); | |
9099 | value = code; | |
9100 | } | |
3ea0a085 | 9101 | } |
c9269dff | 9102 | } |
cf43a2fe | 9103 | } |
dd93cd0a AM |
9104 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
9105 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
9106 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
9107 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
9108 | { | |
9109 | // First instruction of a global dynamic sequence, arg setup insn. | |
9110 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9111 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
9112 | enum Got_type got_type = GOT_TYPE_STANDARD; | |
9113 | if (tls_type == tls::TLSOPT_NONE) | |
9114 | got_type = GOT_TYPE_TLSGD; | |
9115 | else if (tls_type == tls::TLSOPT_TO_IE) | |
9116 | got_type = GOT_TYPE_TPREL; | |
9117 | if (got_type != GOT_TYPE_STANDARD) | |
9118 | { | |
9119 | if (gsym != NULL) | |
9120 | { | |
9121 | gold_assert(gsym->has_got_offset(got_type)); | |
9122 | value = gsym->got_offset(got_type); | |
9123 | } | |
9124 | else | |
9125 | { | |
dd93cd0a AM |
9126 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
9127 | value = object->local_got_offset(r_sym, got_type); | |
9128 | } | |
9129 | value -= target->got_section()->got_base_offset(object); | |
9130 | } | |
9131 | if (tls_type == tls::TLSOPT_TO_IE) | |
9132 | { | |
9133 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9134 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9135 | { | |
dcfc7dd4 | 9136 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
9137 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
9138 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi | |
9139 | if (size == 32) | |
9140 | insn |= 32 << 26; // lwz | |
9141 | else | |
9142 | insn |= 58 << 26; // ld | |
9143 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9144 | } | |
9145 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
9146 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
9147 | } | |
9148 | else if (tls_type == tls::TLSOPT_TO_LE) | |
9149 | { | |
9150 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
9151 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
9152 | { | |
dcfc7dd4 | 9153 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
9154 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
9155 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 9156 | if (size == 32) |
0f81d3f0 AM |
9157 | insn |= addis_0_2; |
9158 | else | |
9159 | insn |= addis_0_13; | |
dd93cd0a AM |
9160 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
9161 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9162 | value = psymval->value(object, rela.get_r_addend()); | |
9163 | } | |
9164 | else | |
9165 | { | |
dcfc7dd4 | 9166 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
9167 | Insn insn = nop; |
9168 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9169 | r_type = elfcpp::R_POWERPC_NONE; | |
9170 | } | |
9171 | } | |
9172 | } | |
9173 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9174 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
9175 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
9176 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
9177 | { | |
9178 | // First instruction of a local dynamic sequence, arg setup insn. | |
9179 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); | |
9180 | if (tls_type == tls::TLSOPT_NONE) | |
9181 | { | |
9182 | value = target->tlsld_got_offset(); | |
9183 | value -= target->got_section()->got_base_offset(object); | |
9184 | } | |
9185 | else | |
9186 | { | |
9187 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
9188 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
9189 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
9190 | { | |
dcfc7dd4 | 9191 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
0f81d3f0 AM |
9192 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
9193 | insn &= (1 << 26) - (1 << 21); // extract rt | |
dd93cd0a | 9194 | if (size == 32) |
0f81d3f0 AM |
9195 | insn |= addis_0_2; |
9196 | else | |
9197 | insn |= addis_0_13; | |
dd93cd0a AM |
9198 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
9199 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
7404fe1b | 9200 | value = dtp_offset; |
dd93cd0a AM |
9201 | } |
9202 | else | |
9203 | { | |
dcfc7dd4 | 9204 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
9205 | Insn insn = nop; |
9206 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9207 | r_type = elfcpp::R_POWERPC_NONE; | |
9208 | } | |
9209 | } | |
9210 | } | |
9211 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 | |
9212 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO | |
9213 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI | |
9214 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA) | |
9215 | { | |
9216 | // Accesses relative to a local dynamic sequence address, | |
9217 | // no optimisation here. | |
9218 | if (gsym != NULL) | |
9219 | { | |
9220 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); | |
9221 | value = gsym->got_offset(GOT_TYPE_DTPREL); | |
9222 | } | |
9223 | else | |
9224 | { | |
dd93cd0a AM |
9225 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
9226 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); | |
9227 | } | |
9228 | value -= target->got_section()->got_base_offset(object); | |
9229 | } | |
9230 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9231 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
9232 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
9233 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
9234 | { | |
9235 | // First instruction of initial exec sequence. | |
9236 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9237 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
9238 | if (tls_type == tls::TLSOPT_NONE) | |
9239 | { | |
9240 | if (gsym != NULL) | |
9241 | { | |
9242 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); | |
9243 | value = gsym->got_offset(GOT_TYPE_TPREL); | |
9244 | } | |
9245 | else | |
9246 | { | |
dd93cd0a AM |
9247 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
9248 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); | |
9249 | } | |
9250 | value -= target->got_section()->got_base_offset(object); | |
9251 | } | |
9252 | else | |
9253 | { | |
9254 | gold_assert(tls_type == tls::TLSOPT_TO_LE); | |
9255 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
9256 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
9257 | { | |
dcfc7dd4 | 9258 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
9259 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
9260 | insn &= (1 << 26) - (1 << 21); // extract rt from ld | |
9261 | if (size == 32) | |
9262 | insn |= addis_0_2; | |
9263 | else | |
9264 | insn |= addis_0_13; | |
9265 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9266 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
9267 | value = psymval->value(object, rela.get_r_addend()); | |
9268 | } | |
9269 | else | |
9270 | { | |
dcfc7dd4 | 9271 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
dd93cd0a AM |
9272 | Insn insn = nop; |
9273 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9274 | r_type = elfcpp::R_POWERPC_NONE; | |
9275 | } | |
9276 | } | |
9277 | } | |
9278 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
9279 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
9280 | { | |
9281 | // Second instruction of a global dynamic sequence, | |
9282 | // the __tls_get_addr call | |
e3deeb9c | 9283 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
9284 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
9285 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); | |
9286 | if (tls_type != tls::TLSOPT_NONE) | |
9287 | { | |
9288 | if (tls_type == tls::TLSOPT_TO_IE) | |
9289 | { | |
9290 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9291 | Insn insn = add_3_3_13; | |
9292 | if (size == 32) | |
9293 | insn = add_3_3_2; | |
9294 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9295 | r_type = elfcpp::R_POWERPC_NONE; | |
9296 | } | |
9297 | else | |
9298 | { | |
9299 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9300 | Insn insn = addi_3_3; | |
9301 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9302 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9303 | view += d_offset; |
dd93cd0a AM |
9304 | value = psymval->value(object, rela.get_r_addend()); |
9305 | } | |
e3deeb9c | 9306 | this->skip_next_tls_get_addr_call(); |
dd93cd0a AM |
9307 | } |
9308 | } | |
9309 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
9310 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
9311 | { | |
9312 | // Second instruction of a local dynamic sequence, | |
9313 | // the __tls_get_addr call | |
e3deeb9c | 9314 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
dd93cd0a AM |
9315 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
9316 | if (tls_type == tls::TLSOPT_TO_LE) | |
9317 | { | |
9318 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9319 | Insn insn = addi_3_3; | |
9320 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
e3deeb9c | 9321 | this->skip_next_tls_get_addr_call(); |
dd93cd0a | 9322 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
dcfc7dd4 | 9323 | view += d_offset; |
7404fe1b | 9324 | value = dtp_offset; |
dd93cd0a AM |
9325 | } |
9326 | } | |
9327 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
9328 | { | |
9329 | // Second instruction of an initial exec sequence | |
9330 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
9331 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); | |
9332 | if (tls_type == tls::TLSOPT_TO_LE) | |
9333 | { | |
9334 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9335 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9336 | unsigned int reg = size == 32 ? 2 : 13; | |
9337 | insn = at_tls_transform(insn, reg); | |
9338 | gold_assert(insn != 0); | |
9339 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9340 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 9341 | view += d_offset; |
dd93cd0a AM |
9342 | value = psymval->value(object, rela.get_r_addend()); |
9343 | } | |
9344 | } | |
0cfb0717 | 9345 | else if (!has_stub_value) |
cf43a2fe | 9346 | { |
23cedd1d AM |
9347 | if (!has_plt_offset && r_type == elfcpp::R_POWERPC_PLTCALL) |
9348 | { | |
9349 | // PLTCALL without plt entry => convert to direct call | |
9350 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9351 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9352 | insn = (insn & 1) | b; | |
9353 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9354 | if (size == 32) | |
9355 | r_type = elfcpp::R_PPC_PLTREL24; | |
9356 | else | |
9357 | r_type = elfcpp::R_POWERPC_REL24; | |
9358 | } | |
dd93cd0a | 9359 | Address addend = 0; |
08be3224 AM |
9360 | if (!(size == 32 |
9361 | && (r_type == elfcpp::R_PPC_PLTREL24 | |
9362 | || r_type == elfcpp::R_POWERPC_PLT16_LO | |
9363 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
9364 | || r_type == elfcpp::R_POWERPC_PLT16_HA))) | |
cf43a2fe | 9365 | addend = rela.get_r_addend(); |
c9824451 | 9366 | value = psymval->value(object, addend); |
dd93cd0a | 9367 | if (size == 64 && is_branch_reloc(r_type)) |
9055360d AM |
9368 | { |
9369 | if (target->abiversion() >= 2) | |
9370 | { | |
9371 | if (gsym != NULL) | |
9372 | value += object->ppc64_local_entry_offset(gsym); | |
9373 | else | |
9374 | value += object->ppc64_local_entry_offset(r_sym); | |
9375 | } | |
9376 | else | |
1611bc4a AM |
9377 | { |
9378 | unsigned int dest_shndx; | |
9379 | target->symval_for_branch(relinfo->symtab, gsym, object, | |
9380 | &value, &dest_shndx); | |
9381 | } | |
9055360d | 9382 | } |
cbcb23fa | 9383 | Address max_branch_offset = max_branch_delta(r_type); |
ec661b9d AM |
9384 | if (max_branch_offset != 0 |
9385 | && value - address + max_branch_offset >= 2 * max_branch_offset) | |
9386 | { | |
9387 | Stub_table<size, big_endian>* stub_table | |
9388 | = object->stub_table(relinfo->data_shndx); | |
0cfdc767 AM |
9389 | if (stub_table != NULL) |
9390 | { | |
9391 | Address off = stub_table->find_long_branch_entry(object, value); | |
9392 | if (off != invalid_address) | |
0cfb0717 AM |
9393 | { |
9394 | value = (stub_table->stub_address() + stub_table->plt_size() | |
9395 | + off); | |
9396 | has_stub_value = true; | |
9397 | } | |
0cfdc767 | 9398 | } |
ec661b9d | 9399 | } |
42cacb20 DE |
9400 | } |
9401 | ||
42cacb20 DE |
9402 | switch (r_type) |
9403 | { | |
dd93cd0a AM |
9404 | case elfcpp::R_PPC64_REL64: |
9405 | case elfcpp::R_POWERPC_REL32: | |
9406 | case elfcpp::R_POWERPC_REL24: | |
9407 | case elfcpp::R_PPC_PLTREL24: | |
9408 | case elfcpp::R_PPC_LOCAL24PC: | |
9409 | case elfcpp::R_POWERPC_REL16: | |
9410 | case elfcpp::R_POWERPC_REL16_LO: | |
9411 | case elfcpp::R_POWERPC_REL16_HI: | |
9412 | case elfcpp::R_POWERPC_REL16_HA: | |
a680de9a | 9413 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a AM |
9414 | case elfcpp::R_POWERPC_REL14: |
9415 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9416 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
9417 | value -= address; | |
9418 | break; | |
9419 | ||
42cacb20 DE |
9420 | case elfcpp::R_PPC64_TOC16: |
9421 | case elfcpp::R_PPC64_TOC16_LO: | |
9422 | case elfcpp::R_PPC64_TOC16_HI: | |
9423 | case elfcpp::R_PPC64_TOC16_HA: | |
9424 | case elfcpp::R_PPC64_TOC16_DS: | |
9425 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe | 9426 | // Subtract the TOC base address. |
c9269dff | 9427 | value -= (target->got_section()->output_section()->address() |
dd93cd0a | 9428 | + object->toc_base_offset()); |
42cacb20 DE |
9429 | break; |
9430 | ||
cf43a2fe AM |
9431 | case elfcpp::R_POWERPC_SECTOFF: |
9432 | case elfcpp::R_POWERPC_SECTOFF_LO: | |
9433 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
9434 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
9435 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9436 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
9437 | if (os != NULL) | |
9438 | value -= os->address(); | |
42cacb20 DE |
9439 | break; |
9440 | ||
dd93cd0a AM |
9441 | case elfcpp::R_PPC64_TPREL16_DS: |
9442 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
f9c6b907 AM |
9443 | case elfcpp::R_PPC64_TPREL16_HIGH: |
9444 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
dd93cd0a | 9445 | if (size != 64) |
f9c6b907 | 9446 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
dd93cd0a | 9447 | break; |
d8e90251 | 9448 | // Fall through. |
dd93cd0a AM |
9449 | case elfcpp::R_POWERPC_TPREL16: |
9450 | case elfcpp::R_POWERPC_TPREL16_LO: | |
9451 | case elfcpp::R_POWERPC_TPREL16_HI: | |
9452 | case elfcpp::R_POWERPC_TPREL16_HA: | |
9453 | case elfcpp::R_POWERPC_TPREL: | |
9454 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
9455 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
9456 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
9457 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
9458 | // tls symbol values are relative to tls_segment()->vaddr() | |
9459 | value -= tp_offset; | |
9460 | break; | |
9461 | ||
9462 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9463 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
9464 | case elfcpp::R_PPC64_DTPREL16_HIGHER: | |
9465 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: | |
9466 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: | |
9467 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: | |
9468 | if (size != 64) | |
9469 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO | |
9470 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 | |
9471 | break; | |
d8e90251 | 9472 | // Fall through. |
dd93cd0a AM |
9473 | case elfcpp::R_POWERPC_DTPREL16: |
9474 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9475 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9476 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9477 | case elfcpp::R_POWERPC_DTPREL: | |
f9c6b907 AM |
9478 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
9479 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
dd93cd0a AM |
9480 | // tls symbol values are relative to tls_segment()->vaddr() |
9481 | value -= dtp_offset; | |
9482 | break; | |
9483 | ||
45965137 AM |
9484 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
9485 | if (gsym != NULL) | |
9486 | value += object->ppc64_local_entry_offset(gsym); | |
9487 | else | |
9488 | value += object->ppc64_local_entry_offset(r_sym); | |
9489 | break; | |
9490 | ||
42cacb20 DE |
9491 | default: |
9492 | break; | |
9493 | } | |
9494 | ||
dd93cd0a | 9495 | Insn branch_bit = 0; |
42cacb20 DE |
9496 | switch (r_type) |
9497 | { | |
dd93cd0a AM |
9498 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
9499 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9500 | branch_bit = 1 << 21; | |
d8e90251 | 9501 | // Fall through. |
dd93cd0a AM |
9502 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
9503 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
9504 | { | |
9505 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9506 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9507 | insn &= ~(1 << 21); | |
9508 | insn |= branch_bit; | |
9509 | if (this->is_isa_v2) | |
9510 | { | |
9511 | // Set 'a' bit. This is 0b00010 in BO field for branch | |
9512 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
9513 | // for branch on CTR insns (BO == 1a00t or 1a01t). | |
9514 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
9515 | insn |= 0x02 << 21; | |
9516 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
9517 | insn |= 0x08 << 21; | |
9518 | else | |
9519 | break; | |
9520 | } | |
9521 | else | |
9522 | { | |
9523 | // Invert 'y' bit if not the default. | |
9524 | if (static_cast<Signed_address>(value) < 0) | |
9525 | insn ^= 1 << 21; | |
9526 | } | |
9527 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9528 | } | |
9529 | break; | |
9530 | ||
08be3224 AM |
9531 | case elfcpp::R_POWERPC_PLT16_HA: |
9532 | if (size == 32 | |
9533 | && !parameters->options().output_is_position_independent()) | |
9534 | { | |
9535 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9536 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9537 | ||
9538 | // Convert addis to lis. | |
9539 | if ((insn & (0x3f << 26)) == 15u << 26 | |
9540 | && (insn & (0x1f << 16)) != 0) | |
9541 | { | |
9542 | insn &= ~(0x1f << 16); | |
9543 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9544 | } | |
9545 | } | |
9546 | break; | |
9547 | ||
dd93cd0a AM |
9548 | default: |
9549 | break; | |
9550 | } | |
9551 | ||
aba6bc71 AM |
9552 | if (size == 64) |
9553 | { | |
aba6bc71 AM |
9554 | switch (r_type) |
9555 | { | |
9556 | default: | |
9557 | break; | |
9558 | ||
5edad15d AM |
9559 | // Multi-instruction sequences that access the GOT/TOC can |
9560 | // be optimized, eg. | |
9561 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); | |
9562 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; | |
9563 | // and | |
9564 | // addis ra,r2,0; addi rb,ra,x@toc@l; | |
9565 | // to nop; addi rb,r2,x@toc; | |
9566 | // FIXME: the @got sequence shown above is not yet | |
9567 | // optimized. Note that gcc as of 2017-01-07 doesn't use | |
9568 | // the ELF @got relocs except for TLS, instead using the | |
9569 | // PowerOpen variant of a compiler managed GOT (called TOC). | |
9570 | // The PowerOpen TOC sequence equivalent to the first | |
9571 | // example is optimized. | |
aba6bc71 AM |
9572 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
9573 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9574 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9575 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9576 | case elfcpp::R_POWERPC_GOT16_HA: | |
9577 | case elfcpp::R_PPC64_TOC16_HA: | |
d8f5a274 | 9578 | if (parameters->options().toc_optimize()) |
aba6bc71 | 9579 | { |
dcfc7dd4 | 9580 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 9581 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
9582 | if (r_type == elfcpp::R_PPC64_TOC16_HA |
9583 | && object->make_toc_relative(target, &value)) | |
9584 | { | |
9585 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) | |
9586 | == ((15u << 26) | (2 << 16))); | |
9587 | } | |
9588 | if (((insn & ((0x3f << 26) | 0x1f << 16)) | |
9589 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) | |
9590 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
9591 | { |
9592 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9593 | return true; | |
9594 | } | |
9595 | } | |
9596 | break; | |
9597 | ||
9598 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
9599 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9600 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
9601 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
9602 | case elfcpp::R_POWERPC_GOT16_LO: | |
9603 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
9604 | case elfcpp::R_PPC64_TOC16_LO: | |
9605 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
d8f5a274 | 9606 | if (parameters->options().toc_optimize()) |
aba6bc71 | 9607 | { |
dcfc7dd4 | 9608 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
aba6bc71 | 9609 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
5edad15d AM |
9610 | bool changed = false; |
9611 | if (r_type == elfcpp::R_PPC64_TOC16_LO_DS | |
9612 | && object->make_toc_relative(target, &value)) | |
9613 | { | |
9614 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); | |
9615 | insn ^= (14u << 26) ^ (58u << 26); | |
9616 | r_type = elfcpp::R_PPC64_TOC16_LO; | |
9617 | changed = true; | |
9618 | } | |
9619 | if (ok_lo_toc_insn(insn, r_type) | |
9620 | && value + 0x8000 < 0x10000) | |
aba6bc71 AM |
9621 | { |
9622 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) | |
9623 | { | |
9624 | // Transform addic to addi when we change reg. | |
9625 | insn &= ~((0x3f << 26) | (0x1f << 16)); | |
9626 | insn |= (14u << 26) | (2 << 16); | |
9627 | } | |
9628 | else | |
9629 | { | |
9630 | insn &= ~(0x1f << 16); | |
9631 | insn |= 2 << 16; | |
9632 | } | |
5edad15d | 9633 | changed = true; |
aba6bc71 | 9634 | } |
5edad15d AM |
9635 | if (changed) |
9636 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
aba6bc71 AM |
9637 | } |
9638 | break; | |
549dba71 | 9639 | |
9a23f96e AM |
9640 | case elfcpp::R_POWERPC_TPREL16_HA: |
9641 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9642 | { | |
9643 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9644 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9645 | if ((insn & ((0x3f << 26) | 0x1f << 16)) | |
9646 | != ((15u << 26) | ((size == 32 ? 2 : 13) << 16))) | |
9647 | ; | |
9648 | else | |
9649 | { | |
9650 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); | |
9651 | return true; | |
9652 | } | |
9653 | } | |
9654 | break; | |
9655 | ||
9656 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
9657 | if (size == 32) | |
9658 | // R_PPC_TLSGD, R_PPC_TLSLD | |
9659 | break; | |
9660 | // Fall through. | |
9661 | case elfcpp::R_POWERPC_TPREL16_LO: | |
9662 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) | |
9663 | { | |
9664 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); | |
9665 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
9666 | insn &= ~(0x1f << 16); | |
9667 | insn |= (size == 32 ? 2 : 13) << 16; | |
9668 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); | |
9669 | } | |
9670 | break; | |
9671 | ||
549dba71 AM |
9672 | case elfcpp::R_PPC64_ENTRY: |
9673 | value = (target->got_section()->output_section()->address() | |
9674 | + object->toc_base_offset()); | |
9675 | if (value + 0x80008000 <= 0xffffffff | |
9676 | && !parameters->options().output_is_position_independent()) | |
9677 | { | |
9678 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9679 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9680 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9681 | ||
9682 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9683 | && insn2 == add_2_2_12) | |
9684 | { | |
9685 | insn1 = lis_2 + ha(value); | |
9686 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9687 | insn2 = addi_2_2 + l(value); | |
9688 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9689 | return true; | |
9690 | } | |
9691 | } | |
9692 | else | |
9693 | { | |
9694 | value -= address; | |
9695 | if (value + 0x80008000 <= 0xffffffff) | |
9696 | { | |
9697 | Insn* iview = reinterpret_cast<Insn*>(view); | |
9698 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9699 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); | |
9700 | ||
9701 | if ((insn1 & ~0xfffc) == ld_2_12 | |
9702 | && insn2 == add_2_2_12) | |
9703 | { | |
9704 | insn1 = addis_2_12 + ha(value); | |
9705 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); | |
9706 | insn2 = addi_2_2 + l(value); | |
9707 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); | |
9708 | return true; | |
9709 | } | |
9710 | } | |
9711 | } | |
9712 | break; | |
e3a7574e AM |
9713 | |
9714 | case elfcpp::R_POWERPC_REL16_LO: | |
9715 | // If we are generating a non-PIC executable, edit | |
9716 | // 0: addis 2,12,.TOC.-0b@ha | |
9717 | // addi 2,2,.TOC.-0b@l | |
9718 | // used by ELFv2 global entry points to set up r2, to | |
9719 | // lis 2,.TOC.@ha | |
9720 | // addi 2,2,.TOC.@l | |
9721 | // if .TOC. is in range. */ | |
9722 | if (value + address - 4 + 0x80008000 <= 0xffffffff | |
9723 | && relnum != 0 | |
9724 | && preloc != NULL | |
9725 | && target->abiversion() >= 2 | |
9726 | && !parameters->options().output_is_position_independent() | |
4f038ee5 | 9727 | && rela.get_r_addend() == d_offset + 4 |
e3a7574e AM |
9728 | && gsym != NULL |
9729 | && strcmp(gsym->name(), ".TOC.") == 0) | |
9730 | { | |
0e123f69 | 9731 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
e3a7574e AM |
9732 | Reltype prev_rela(preloc - reloc_size); |
9733 | if ((prev_rela.get_r_info() | |
9734 | == elfcpp::elf_r_info<size>(r_sym, | |
9735 | elfcpp::R_POWERPC_REL16_HA)) | |
9736 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() | |
9737 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) | |
9738 | { | |
dcfc7dd4 | 9739 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
e3a7574e AM |
9740 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
9741 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); | |
9742 | ||
9743 | if ((insn1 & 0xffff0000) == addis_2_12 | |
9744 | && (insn2 & 0xffff0000) == addi_2_2) | |
9745 | { | |
9746 | insn1 = lis_2 + ha(value + address - 4); | |
9747 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); | |
9748 | insn2 = addi_2_2 + l(value + address - 4); | |
9749 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); | |
9750 | if (relinfo->rr) | |
9751 | { | |
9752 | relinfo->rr->set_strategy(relnum - 1, | |
9753 | Relocatable_relocs::RELOC_SPECIAL); | |
9754 | relinfo->rr->set_strategy(relnum, | |
9755 | Relocatable_relocs::RELOC_SPECIAL); | |
9756 | } | |
9757 | return true; | |
9758 | } | |
9759 | } | |
9760 | } | |
9761 | break; | |
aba6bc71 AM |
9762 | } |
9763 | } | |
9764 | ||
f4baf0d4 | 9765 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
b80eed39 | 9766 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
dd93cd0a AM |
9767 | switch (r_type) |
9768 | { | |
9769 | case elfcpp::R_POWERPC_ADDR32: | |
9770 | case elfcpp::R_POWERPC_UADDR32: | |
9771 | if (size == 64) | |
f4baf0d4 | 9772 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9773 | break; |
9774 | ||
9775 | case elfcpp::R_POWERPC_REL32: | |
a680de9a | 9776 | case elfcpp::R_POWERPC_REL16DX_HA: |
dd93cd0a | 9777 | if (size == 64) |
f4baf0d4 | 9778 | overflow = Reloc::CHECK_SIGNED; |
dd93cd0a AM |
9779 | break; |
9780 | ||
dd93cd0a | 9781 | case elfcpp::R_POWERPC_UADDR16: |
f4baf0d4 | 9782 | overflow = Reloc::CHECK_BITFIELD; |
42cacb20 DE |
9783 | break; |
9784 | ||
b80eed39 AM |
9785 | case elfcpp::R_POWERPC_ADDR16: |
9786 | // We really should have three separate relocations, | |
9787 | // one for 16-bit data, one for insns with 16-bit signed fields, | |
9788 | // and one for insns with 16-bit unsigned fields. | |
9789 | overflow = Reloc::CHECK_BITFIELD; | |
9790 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) | |
9791 | overflow = Reloc::CHECK_LOW_INSN; | |
9792 | break; | |
9793 | ||
f9c6b907 AM |
9794 | case elfcpp::R_POWERPC_ADDR16_HI: |
9795 | case elfcpp::R_POWERPC_ADDR16_HA: | |
9796 | case elfcpp::R_POWERPC_GOT16_HI: | |
9797 | case elfcpp::R_POWERPC_GOT16_HA: | |
9798 | case elfcpp::R_POWERPC_PLT16_HI: | |
9799 | case elfcpp::R_POWERPC_PLT16_HA: | |
9800 | case elfcpp::R_POWERPC_SECTOFF_HI: | |
9801 | case elfcpp::R_POWERPC_SECTOFF_HA: | |
9802 | case elfcpp::R_PPC64_TOC16_HI: | |
9803 | case elfcpp::R_PPC64_TOC16_HA: | |
9804 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
9805 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
9806 | case elfcpp::R_POWERPC_TPREL16_HI: | |
9807 | case elfcpp::R_POWERPC_TPREL16_HA: | |
9808 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9809 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
9810 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9811 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
9812 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9813 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
9814 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9815 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
9816 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9817 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
9818 | case elfcpp::R_POWERPC_REL16_HI: | |
9819 | case elfcpp::R_POWERPC_REL16_HA: | |
b80eed39 AM |
9820 | if (size != 32) |
9821 | overflow = Reloc::CHECK_HIGH_INSN; | |
9822 | break; | |
9823 | ||
dd93cd0a AM |
9824 | case elfcpp::R_POWERPC_REL16: |
9825 | case elfcpp::R_PPC64_TOC16: | |
9826 | case elfcpp::R_POWERPC_GOT16: | |
9827 | case elfcpp::R_POWERPC_SECTOFF: | |
9828 | case elfcpp::R_POWERPC_TPREL16: | |
9829 | case elfcpp::R_POWERPC_DTPREL16: | |
b80eed39 AM |
9830 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
9831 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
9832 | case elfcpp::R_POWERPC_GOT_TPREL16: | |
9833 | case elfcpp::R_POWERPC_GOT_DTPREL16: | |
9834 | overflow = Reloc::CHECK_LOW_INSN; | |
9835 | break; | |
9836 | ||
9837 | case elfcpp::R_POWERPC_ADDR24: | |
9838 | case elfcpp::R_POWERPC_ADDR14: | |
9839 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
9840 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
9841 | case elfcpp::R_PPC64_ADDR16_DS: | |
9842 | case elfcpp::R_POWERPC_REL24: | |
9843 | case elfcpp::R_PPC_PLTREL24: | |
9844 | case elfcpp::R_PPC_LOCAL24PC: | |
dd93cd0a AM |
9845 | case elfcpp::R_PPC64_TPREL16_DS: |
9846 | case elfcpp::R_PPC64_DTPREL16_DS: | |
9847 | case elfcpp::R_PPC64_TOC16_DS: | |
9848 | case elfcpp::R_PPC64_GOT16_DS: | |
9849 | case elfcpp::R_PPC64_SECTOFF_DS: | |
9850 | case elfcpp::R_POWERPC_REL14: | |
9851 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
9852 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
f4baf0d4 | 9853 | overflow = Reloc::CHECK_SIGNED; |
42cacb20 | 9854 | break; |
dd93cd0a | 9855 | } |
42cacb20 | 9856 | |
dcfc7dd4 | 9857 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
a680de9a PB |
9858 | Insn insn = 0; |
9859 | ||
b80eed39 AM |
9860 | if (overflow == Reloc::CHECK_LOW_INSN |
9861 | || overflow == Reloc::CHECK_HIGH_INSN) | |
9862 | { | |
a680de9a | 9863 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
b80eed39 | 9864 | |
a47622ac AM |
9865 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
9866 | overflow = Reloc::CHECK_BITFIELD; | |
9867 | else if (overflow == Reloc::CHECK_LOW_INSN | |
9868 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ | |
9869 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ | |
9870 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) | |
9871 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ | |
9872 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ | |
9873 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) | |
b80eed39 | 9874 | overflow = Reloc::CHECK_UNSIGNED; |
e30880c2 CC |
9875 | else |
9876 | overflow = Reloc::CHECK_SIGNED; | |
b80eed39 AM |
9877 | } |
9878 | ||
a680de9a | 9879 | bool maybe_dq_reloc = false; |
3ea0a085 | 9880 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
f4baf0d4 | 9881 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
dd93cd0a AM |
9882 | switch (r_type) |
9883 | { | |
9884 | case elfcpp::R_POWERPC_NONE: | |
9885 | case elfcpp::R_POWERPC_TLS: | |
9886 | case elfcpp::R_POWERPC_GNU_VTINHERIT: | |
9887 | case elfcpp::R_POWERPC_GNU_VTENTRY: | |
23cedd1d AM |
9888 | case elfcpp::R_POWERPC_PLTSEQ: |
9889 | case elfcpp::R_POWERPC_PLTCALL: | |
42cacb20 DE |
9890 | break; |
9891 | ||
9892 | case elfcpp::R_PPC64_ADDR64: | |
dd93cd0a | 9893 | case elfcpp::R_PPC64_REL64: |
cf43a2fe | 9894 | case elfcpp::R_PPC64_TOC: |
45965137 | 9895 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
dd93cd0a AM |
9896 | Reloc::addr64(view, value); |
9897 | break; | |
9898 | ||
9899 | case elfcpp::R_POWERPC_TPREL: | |
9900 | case elfcpp::R_POWERPC_DTPREL: | |
9901 | if (size == 64) | |
9902 | Reloc::addr64(view, value); | |
9903 | else | |
3ea0a085 | 9904 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9905 | break; |
9906 | ||
9907 | case elfcpp::R_PPC64_UADDR64: | |
9908 | Reloc::addr64_u(view, value); | |
42cacb20 DE |
9909 | break; |
9910 | ||
9911 | case elfcpp::R_POWERPC_ADDR32: | |
3ea0a085 | 9912 | status = Reloc::addr32(view, value, overflow); |
dd93cd0a AM |
9913 | break; |
9914 | ||
acc276d8 | 9915 | case elfcpp::R_POWERPC_REL32: |
dd93cd0a | 9916 | case elfcpp::R_POWERPC_UADDR32: |
3ea0a085 | 9917 | status = Reloc::addr32_u(view, value, overflow); |
dd93cd0a AM |
9918 | break; |
9919 | ||
9920 | case elfcpp::R_POWERPC_ADDR24: | |
9921 | case elfcpp::R_POWERPC_REL24: | |
9922 | case elfcpp::R_PPC_PLTREL24: | |
9923 | case elfcpp::R_PPC_LOCAL24PC: | |
3ea0a085 | 9924 | status = Reloc::addr24(view, value, overflow); |
42cacb20 DE |
9925 | break; |
9926 | ||
dd93cd0a AM |
9927 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
9928 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: | |
ec86f434 AM |
9929 | case elfcpp::R_POWERPC_GOT_TPREL16: |
9930 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: | |
dd93cd0a AM |
9931 | if (size == 64) |
9932 | { | |
ec86f434 | 9933 | // On ppc64 these are all ds form |
a680de9a | 9934 | maybe_dq_reloc = true; |
dd93cd0a AM |
9935 | break; |
9936 | } | |
c25aa1e1 | 9937 | // Fall through. |
cf43a2fe | 9938 | case elfcpp::R_POWERPC_ADDR16: |
dd93cd0a | 9939 | case elfcpp::R_POWERPC_REL16: |
cf43a2fe | 9940 | case elfcpp::R_PPC64_TOC16: |
42cacb20 | 9941 | case elfcpp::R_POWERPC_GOT16: |
cf43a2fe | 9942 | case elfcpp::R_POWERPC_SECTOFF: |
dd93cd0a AM |
9943 | case elfcpp::R_POWERPC_TPREL16: |
9944 | case elfcpp::R_POWERPC_DTPREL16: | |
9945 | case elfcpp::R_POWERPC_GOT_TLSGD16: | |
9946 | case elfcpp::R_POWERPC_GOT_TLSLD16: | |
cf43a2fe | 9947 | case elfcpp::R_POWERPC_ADDR16_LO: |
dd93cd0a | 9948 | case elfcpp::R_POWERPC_REL16_LO: |
cf43a2fe | 9949 | case elfcpp::R_PPC64_TOC16_LO: |
42cacb20 | 9950 | case elfcpp::R_POWERPC_GOT16_LO: |
08be3224 | 9951 | case elfcpp::R_POWERPC_PLT16_LO: |
cf43a2fe | 9952 | case elfcpp::R_POWERPC_SECTOFF_LO: |
dd93cd0a AM |
9953 | case elfcpp::R_POWERPC_TPREL16_LO: |
9954 | case elfcpp::R_POWERPC_DTPREL16_LO: | |
9955 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: | |
9956 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: | |
a680de9a PB |
9957 | if (size == 64) |
9958 | status = Reloc::addr16(view, value, overflow); | |
9959 | else | |
9960 | maybe_dq_reloc = true; | |
dd93cd0a AM |
9961 | break; |
9962 | ||
9963 | case elfcpp::R_POWERPC_UADDR16: | |
3ea0a085 | 9964 | status = Reloc::addr16_u(view, value, overflow); |
42cacb20 DE |
9965 | break; |
9966 | ||
f9c6b907 AM |
9967 | case elfcpp::R_PPC64_ADDR16_HIGH: |
9968 | case elfcpp::R_PPC64_TPREL16_HIGH: | |
9969 | case elfcpp::R_PPC64_DTPREL16_HIGH: | |
9970 | if (size == 32) | |
9971 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA | |
9972 | goto unsupp; | |
d8e90251 | 9973 | // Fall through. |
cf43a2fe | 9974 | case elfcpp::R_POWERPC_ADDR16_HI: |
dd93cd0a | 9975 | case elfcpp::R_POWERPC_REL16_HI: |
cf43a2fe | 9976 | case elfcpp::R_PPC64_TOC16_HI: |
42cacb20 | 9977 | case elfcpp::R_POWERPC_GOT16_HI: |
08be3224 | 9978 | case elfcpp::R_POWERPC_PLT16_HI: |
cf43a2fe | 9979 | case elfcpp::R_POWERPC_SECTOFF_HI: |
dd93cd0a AM |
9980 | case elfcpp::R_POWERPC_TPREL16_HI: |
9981 | case elfcpp::R_POWERPC_DTPREL16_HI: | |
9982 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: | |
9983 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: | |
9984 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: | |
9985 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: | |
9986 | Reloc::addr16_hi(view, value); | |
42cacb20 DE |
9987 | break; |
9988 | ||
f9c6b907 AM |
9989 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
9990 | case elfcpp::R_PPC64_TPREL16_HIGHA: | |
9991 | case elfcpp::R_PPC64_DTPREL16_HIGHA: | |
9992 | if (size == 32) | |
9993 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD | |
9994 | goto unsupp; | |
d8e90251 | 9995 | // Fall through. |
cf43a2fe | 9996 | case elfcpp::R_POWERPC_ADDR16_HA: |
dd93cd0a | 9997 | case elfcpp::R_POWERPC_REL16_HA: |
cf43a2fe | 9998 | case elfcpp::R_PPC64_TOC16_HA: |
42cacb20 | 9999 | case elfcpp::R_POWERPC_GOT16_HA: |
08be3224 | 10000 | case elfcpp::R_POWERPC_PLT16_HA: |
cf43a2fe | 10001 | case elfcpp::R_POWERPC_SECTOFF_HA: |
dd93cd0a AM |
10002 | case elfcpp::R_POWERPC_TPREL16_HA: |
10003 | case elfcpp::R_POWERPC_DTPREL16_HA: | |
10004 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: | |
10005 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: | |
10006 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: | |
10007 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: | |
10008 | Reloc::addr16_ha(view, value); | |
42cacb20 DE |
10009 | break; |
10010 | ||
a680de9a PB |
10011 | case elfcpp::R_POWERPC_REL16DX_HA: |
10012 | status = Reloc::addr16dx_ha(view, value, overflow); | |
10013 | break; | |
10014 | ||
dd93cd0a AM |
10015 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
10016 | if (size == 32) | |
10017 | // R_PPC_EMB_NADDR16_LO | |
10018 | goto unsupp; | |
d8e90251 | 10019 | // Fall through. |
dd93cd0a AM |
10020 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
10021 | case elfcpp::R_PPC64_TPREL16_HIGHER: | |
10022 | Reloc::addr16_hi2(view, value); | |
42cacb20 DE |
10023 | break; |
10024 | ||
dd93cd0a AM |
10025 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
10026 | if (size == 32) | |
10027 | // R_PPC_EMB_NADDR16_HI | |
10028 | goto unsupp; | |
d8e90251 | 10029 | // Fall through. |
dd93cd0a AM |
10030 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
10031 | case elfcpp::R_PPC64_TPREL16_HIGHERA: | |
10032 | Reloc::addr16_ha2(view, value); | |
42cacb20 DE |
10033 | break; |
10034 | ||
dd93cd0a AM |
10035 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
10036 | if (size == 32) | |
10037 | // R_PPC_EMB_NADDR16_HA | |
10038 | goto unsupp; | |
d8e90251 | 10039 | // Fall through. |
dd93cd0a AM |
10040 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
10041 | case elfcpp::R_PPC64_TPREL16_HIGHEST: | |
10042 | Reloc::addr16_hi3(view, value); | |
42cacb20 DE |
10043 | break; |
10044 | ||
dd93cd0a AM |
10045 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
10046 | if (size == 32) | |
10047 | // R_PPC_EMB_SDAI16 | |
10048 | goto unsupp; | |
d8e90251 | 10049 | // Fall through. |
dd93cd0a AM |
10050 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
10051 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: | |
10052 | Reloc::addr16_ha3(view, value); | |
10053 | break; | |
10054 | ||
10055 | case elfcpp::R_PPC64_DTPREL16_DS: | |
10056 | case elfcpp::R_PPC64_DTPREL16_LO_DS: | |
10057 | if (size == 32) | |
10058 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 | |
10059 | goto unsupp; | |
d8e90251 | 10060 | // Fall through. |
dd93cd0a AM |
10061 | case elfcpp::R_PPC64_TPREL16_DS: |
10062 | case elfcpp::R_PPC64_TPREL16_LO_DS: | |
10063 | if (size == 32) | |
10064 | // R_PPC_TLSGD, R_PPC_TLSLD | |
10065 | break; | |
d8e90251 | 10066 | // Fall through. |
cf43a2fe AM |
10067 | case elfcpp::R_PPC64_ADDR16_DS: |
10068 | case elfcpp::R_PPC64_ADDR16_LO_DS: | |
42cacb20 DE |
10069 | case elfcpp::R_PPC64_TOC16_DS: |
10070 | case elfcpp::R_PPC64_TOC16_LO_DS: | |
cf43a2fe AM |
10071 | case elfcpp::R_PPC64_GOT16_DS: |
10072 | case elfcpp::R_PPC64_GOT16_LO_DS: | |
08be3224 | 10073 | case elfcpp::R_PPC64_PLT16_LO_DS: |
cf43a2fe AM |
10074 | case elfcpp::R_PPC64_SECTOFF_DS: |
10075 | case elfcpp::R_PPC64_SECTOFF_LO_DS: | |
a680de9a | 10076 | maybe_dq_reloc = true; |
dd93cd0a AM |
10077 | break; |
10078 | ||
10079 | case elfcpp::R_POWERPC_ADDR14: | |
10080 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: | |
10081 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: | |
10082 | case elfcpp::R_POWERPC_REL14: | |
10083 | case elfcpp::R_POWERPC_REL14_BRTAKEN: | |
10084 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: | |
3ea0a085 | 10085 | status = Reloc::addr14(view, value, overflow); |
42cacb20 DE |
10086 | break; |
10087 | ||
10088 | case elfcpp::R_POWERPC_COPY: | |
10089 | case elfcpp::R_POWERPC_GLOB_DAT: | |
10090 | case elfcpp::R_POWERPC_JMP_SLOT: | |
10091 | case elfcpp::R_POWERPC_RELATIVE: | |
42cacb20 | 10092 | case elfcpp::R_POWERPC_DTPMOD: |
dd93cd0a AM |
10093 | case elfcpp::R_PPC64_JMP_IREL: |
10094 | case elfcpp::R_POWERPC_IRELATIVE: | |
42cacb20 DE |
10095 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
10096 | _("unexpected reloc %u in object file"), | |
10097 | r_type); | |
10098 | break; | |
10099 | ||
7e57d19e | 10100 | case elfcpp::R_PPC64_TOCSAVE: |
dd93cd0a | 10101 | if (size == 32) |
7e57d19e | 10102 | // R_PPC_EMB_SDA21 |
dd93cd0a AM |
10103 | goto unsupp; |
10104 | else | |
10105 | { | |
7e57d19e AM |
10106 | Symbol_location loc; |
10107 | loc.object = relinfo->object; | |
10108 | loc.shndx = relinfo->data_shndx; | |
10109 | loc.offset = rela.get_r_offset(); | |
10110 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); | |
10111 | if (p != target->tocsave_loc().end()) | |
10112 | { | |
10113 | // If we've generated plt calls using this tocsave, then | |
10114 | // the nop needs to be changed to save r2. | |
10115 | Insn* iview = reinterpret_cast<Insn*>(view); | |
10116 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) | |
10117 | elfcpp::Swap<32, big_endian>:: | |
10118 | writeval(iview, std_2_1 + target->stk_toc()); | |
10119 | } | |
dd93cd0a AM |
10120 | } |
10121 | break; | |
10122 | ||
10123 | case elfcpp::R_PPC_EMB_SDA2I16: | |
10124 | case elfcpp::R_PPC_EMB_SDA2REL: | |
10125 | if (size == 32) | |
10126 | goto unsupp; | |
10127 | // R_PPC64_TLSGD, R_PPC64_TLSLD | |
6ce78956 AM |
10128 | break; |
10129 | ||
dd93cd0a AM |
10130 | case elfcpp::R_POWERPC_PLT32: |
10131 | case elfcpp::R_POWERPC_PLTREL32: | |
dd93cd0a AM |
10132 | case elfcpp::R_PPC_SDAREL16: |
10133 | case elfcpp::R_POWERPC_ADDR30: | |
10134 | case elfcpp::R_PPC64_PLT64: | |
10135 | case elfcpp::R_PPC64_PLTREL64: | |
10136 | case elfcpp::R_PPC64_PLTGOT16: | |
10137 | case elfcpp::R_PPC64_PLTGOT16_LO: | |
10138 | case elfcpp::R_PPC64_PLTGOT16_HI: | |
10139 | case elfcpp::R_PPC64_PLTGOT16_HA: | |
dd93cd0a AM |
10140 | case elfcpp::R_PPC64_PLTGOT16_DS: |
10141 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: | |
dd93cd0a AM |
10142 | case elfcpp::R_PPC_EMB_RELSDA: |
10143 | case elfcpp::R_PPC_TOC16: | |
42cacb20 | 10144 | default: |
dd93cd0a | 10145 | unsupp: |
42cacb20 DE |
10146 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
10147 | _("unsupported reloc %u"), | |
10148 | r_type); | |
10149 | break; | |
10150 | } | |
a680de9a PB |
10151 | |
10152 | if (maybe_dq_reloc) | |
10153 | { | |
10154 | if (insn == 0) | |
10155 | insn = elfcpp::Swap<32, big_endian>::readval(iview); | |
10156 | ||
10157 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ | |
10158 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ | |
10159 | && (insn & 3) == 1)) | |
10160 | status = Reloc::addr16_dq(view, value, overflow); | |
10161 | else if (size == 64 | |
10162 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ | |
10163 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ | |
10164 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ | |
10165 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) | |
10166 | status = Reloc::addr16_ds(view, value, overflow); | |
10167 | else | |
10168 | status = Reloc::addr16(view, value, overflow); | |
10169 | } | |
10170 | ||
0cfb0717 | 10171 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
3ffaac20 AM |
10172 | && (has_stub_value |
10173 | || !(gsym != NULL | |
282c9750 | 10174 | && gsym->is_undefined() |
3ffaac20 | 10175 | && is_branch_reloc(r_type)))) |
0cfb0717 AM |
10176 | { |
10177 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
10178 | _("relocation overflow")); | |
10179 | if (has_stub_value) | |
10180 | gold_info(_("try relinking with a smaller --stub-group-size")); | |
10181 | } | |
42cacb20 DE |
10182 | |
10183 | return true; | |
10184 | } | |
10185 | ||
42cacb20 DE |
10186 | // Relocate section data. |
10187 | ||
10188 | template<int size, bool big_endian> | |
10189 | void | |
10190 | Target_powerpc<size, big_endian>::relocate_section( | |
d83ce4e3 AM |
10191 | const Relocate_info<size, big_endian>* relinfo, |
10192 | unsigned int sh_type, | |
10193 | const unsigned char* prelocs, | |
10194 | size_t reloc_count, | |
10195 | Output_section* output_section, | |
10196 | bool needs_special_offset_handling, | |
10197 | unsigned char* view, | |
c9269dff | 10198 | Address address, |
d83ce4e3 AM |
10199 | section_size_type view_size, |
10200 | const Reloc_symbol_changes* reloc_symbol_changes) | |
42cacb20 DE |
10201 | { |
10202 | typedef Target_powerpc<size, big_endian> Powerpc; | |
10203 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; | |
168a4726 AM |
10204 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
10205 | Powerpc_comdat_behavior; | |
4d625b70 CC |
10206 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
10207 | Classify_reloc; | |
42cacb20 DE |
10208 | |
10209 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
10210 | ||
4d625b70 CC |
10211 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
10212 | Powerpc_comdat_behavior, Classify_reloc>( | |
42cacb20 DE |
10213 | relinfo, |
10214 | this, | |
10215 | prelocs, | |
10216 | reloc_count, | |
10217 | output_section, | |
10218 | needs_special_offset_handling, | |
10219 | view, | |
10220 | address, | |
364c7fa5 ILT |
10221 | view_size, |
10222 | reloc_symbol_changes); | |
42cacb20 DE |
10223 | } |
10224 | ||
4d625b70 | 10225 | template<int size, bool big_endian> |
cf43a2fe | 10226 | class Powerpc_scan_relocatable_reloc |
42cacb20 | 10227 | { |
cf43a2fe | 10228 | public: |
0e123f69 AM |
10229 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
10230 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
4d625b70 CC |
10231 | static const int sh_type = elfcpp::SHT_RELA; |
10232 | ||
10233 | // Return the symbol referred to by the relocation. | |
10234 | static inline unsigned int | |
10235 | get_r_sym(const Reltype* reloc) | |
10236 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } | |
10237 | ||
10238 | // Return the type of the relocation. | |
10239 | static inline unsigned int | |
10240 | get_r_type(const Reltype* reloc) | |
10241 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } | |
10242 | ||
cf43a2fe AM |
10243 | // Return the strategy to use for a local symbol which is not a |
10244 | // section symbol, given the relocation type. | |
10245 | inline Relocatable_relocs::Reloc_strategy | |
10246 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) | |
10247 | { | |
10248 | if (r_type == 0 && r_sym == 0) | |
10249 | return Relocatable_relocs::RELOC_DISCARD; | |
10250 | return Relocatable_relocs::RELOC_COPY; | |
10251 | } | |
10252 | ||
10253 | // Return the strategy to use for a local symbol which is a section | |
10254 | // symbol, given the relocation type. | |
10255 | inline Relocatable_relocs::Reloc_strategy | |
10256 | local_section_strategy(unsigned int, Relobj*) | |
10257 | { | |
10258 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
10259 | } | |
10260 | ||
10261 | // Return the strategy to use for a global symbol, given the | |
10262 | // relocation type, the object, and the symbol index. | |
10263 | inline Relocatable_relocs::Reloc_strategy | |
10264 | global_strategy(unsigned int r_type, Relobj*, unsigned int) | |
10265 | { | |
08be3224 AM |
10266 | if (size == 32 |
10267 | && (r_type == elfcpp::R_PPC_PLTREL24 | |
10268 | || r_type == elfcpp::R_POWERPC_PLT16_LO | |
10269 | || r_type == elfcpp::R_POWERPC_PLT16_HI | |
10270 | || r_type == elfcpp::R_POWERPC_PLT16_HA)) | |
cf43a2fe AM |
10271 | return Relocatable_relocs::RELOC_SPECIAL; |
10272 | return Relocatable_relocs::RELOC_COPY; | |
10273 | } | |
10274 | }; | |
42cacb20 DE |
10275 | |
10276 | // Scan the relocs during a relocatable link. | |
10277 | ||
10278 | template<int size, bool big_endian> | |
10279 | void | |
10280 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( | |
d83ce4e3 AM |
10281 | Symbol_table* symtab, |
10282 | Layout* layout, | |
10283 | Sized_relobj_file<size, big_endian>* object, | |
10284 | unsigned int data_shndx, | |
10285 | unsigned int sh_type, | |
10286 | const unsigned char* prelocs, | |
10287 | size_t reloc_count, | |
10288 | Output_section* output_section, | |
10289 | bool needs_special_offset_handling, | |
10290 | size_t local_symbol_count, | |
10291 | const unsigned char* plocal_symbols, | |
10292 | Relocatable_relocs* rr) | |
42cacb20 | 10293 | { |
4d625b70 CC |
10294 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
10295 | ||
42cacb20 DE |
10296 | gold_assert(sh_type == elfcpp::SHT_RELA); |
10297 | ||
4d625b70 | 10298 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
42cacb20 DE |
10299 | symtab, |
10300 | layout, | |
10301 | object, | |
10302 | data_shndx, | |
10303 | prelocs, | |
10304 | reloc_count, | |
10305 | output_section, | |
10306 | needs_special_offset_handling, | |
10307 | local_symbol_count, | |
10308 | plocal_symbols, | |
10309 | rr); | |
10310 | } | |
10311 | ||
4d625b70 CC |
10312 | // Scan the relocs for --emit-relocs. |
10313 | ||
10314 | template<int size, bool big_endian> | |
10315 | void | |
10316 | Target_powerpc<size, big_endian>::emit_relocs_scan( | |
10317 | Symbol_table* symtab, | |
10318 | Layout* layout, | |
10319 | Sized_relobj_file<size, big_endian>* object, | |
10320 | unsigned int data_shndx, | |
10321 | unsigned int sh_type, | |
10322 | const unsigned char* prelocs, | |
10323 | size_t reloc_count, | |
10324 | Output_section* output_section, | |
10325 | bool needs_special_offset_handling, | |
10326 | size_t local_symbol_count, | |
10327 | const unsigned char* plocal_syms, | |
10328 | Relocatable_relocs* rr) | |
10329 | { | |
10330 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
10331 | Classify_reloc; | |
10332 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
10333 | Emit_relocs_strategy; | |
10334 | ||
10335 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
10336 | ||
10337 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
10338 | symtab, | |
10339 | layout, | |
10340 | object, | |
10341 | data_shndx, | |
10342 | prelocs, | |
10343 | reloc_count, | |
10344 | output_section, | |
10345 | needs_special_offset_handling, | |
10346 | local_symbol_count, | |
10347 | plocal_syms, | |
10348 | rr); | |
10349 | } | |
10350 | ||
7404fe1b | 10351 | // Emit relocations for a section. |
dd93cd0a AM |
10352 | // This is a modified version of the function by the same name in |
10353 | // target-reloc.h. Using relocate_special_relocatable for | |
10354 | // R_PPC_PLTREL24 would require duplication of the entire body of the | |
10355 | // loop, so we may as well duplicate the whole thing. | |
42cacb20 DE |
10356 | |
10357 | template<int size, bool big_endian> | |
10358 | void | |
7404fe1b | 10359 | Target_powerpc<size, big_endian>::relocate_relocs( |
42cacb20 DE |
10360 | const Relocate_info<size, big_endian>* relinfo, |
10361 | unsigned int sh_type, | |
10362 | const unsigned char* prelocs, | |
10363 | size_t reloc_count, | |
10364 | Output_section* output_section, | |
62fe925a | 10365 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
cf43a2fe | 10366 | unsigned char*, |
dd93cd0a | 10367 | Address view_address, |
cf43a2fe | 10368 | section_size_type, |
42cacb20 DE |
10369 | unsigned char* reloc_view, |
10370 | section_size_type reloc_view_size) | |
10371 | { | |
10372 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
10373 | ||
0e123f69 AM |
10374 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
10375 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; | |
10376 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
dcfc7dd4 AM |
10377 | // Offset from start of insn to d-field reloc. |
10378 | const int d_offset = big_endian ? 2 : 0; | |
cf43a2fe AM |
10379 | |
10380 | Powerpc_relobj<size, big_endian>* const object | |
10381 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); | |
10382 | const unsigned int local_count = object->local_symbol_count(); | |
10383 | unsigned int got2_shndx = object->got2_shndx(); | |
c9269dff | 10384 | Address got2_addend = 0; |
cf43a2fe | 10385 | if (got2_shndx != 0) |
c9269dff AM |
10386 | { |
10387 | got2_addend = object->get_output_section_offset(got2_shndx); | |
10388 | gold_assert(got2_addend != invalid_address); | |
10389 | } | |
cf43a2fe | 10390 | |
033bfb73 CC |
10391 | const bool relocatable = parameters->options().relocatable(); |
10392 | ||
cf43a2fe | 10393 | unsigned char* pwrite = reloc_view; |
7404fe1b | 10394 | bool zap_next = false; |
cf43a2fe AM |
10395 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
10396 | { | |
91a65d2f | 10397 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
cf43a2fe AM |
10398 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
10399 | continue; | |
10400 | ||
10401 | Reltype reloc(prelocs); | |
10402 | Reltype_write reloc_write(pwrite); | |
10403 | ||
7404fe1b | 10404 | Address offset = reloc.get_r_offset(); |
cf43a2fe | 10405 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
7404fe1b AM |
10406 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
10407 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
10408 | const unsigned int orig_r_sym = r_sym; | |
10409 | typename elfcpp::Elf_types<size>::Elf_Swxword addend | |
10410 | = reloc.get_r_addend(); | |
10411 | const Symbol* gsym = NULL; | |
10412 | ||
10413 | if (zap_next) | |
10414 | { | |
10415 | // We could arrange to discard these and other relocs for | |
10416 | // tls optimised sequences in the strategy methods, but for | |
10417 | // now do as BFD ld does. | |
10418 | r_type = elfcpp::R_POWERPC_NONE; | |
10419 | zap_next = false; | |
10420 | } | |
cf43a2fe AM |
10421 | |
10422 | // Get the new symbol index. | |
9215b98b | 10423 | Output_section* os = NULL; |
cf43a2fe AM |
10424 | if (r_sym < local_count) |
10425 | { | |
10426 | switch (strategy) | |
10427 | { | |
10428 | case Relocatable_relocs::RELOC_COPY: | |
10429 | case Relocatable_relocs::RELOC_SPECIAL: | |
7404fe1b | 10430 | if (r_sym != 0) |
dd93cd0a | 10431 | { |
7404fe1b AM |
10432 | r_sym = object->symtab_index(r_sym); |
10433 | gold_assert(r_sym != -1U); | |
dd93cd0a | 10434 | } |
cf43a2fe AM |
10435 | break; |
10436 | ||
10437 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
10438 | { | |
10439 | // We are adjusting a section symbol. We need to find | |
10440 | // the symbol table index of the section symbol for | |
10441 | // the output section corresponding to input section | |
10442 | // in which this symbol is defined. | |
10443 | gold_assert(r_sym < local_count); | |
10444 | bool is_ordinary; | |
10445 | unsigned int shndx = | |
10446 | object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
10447 | gold_assert(is_ordinary); | |
9215b98b | 10448 | os = object->output_section(shndx); |
cf43a2fe AM |
10449 | gold_assert(os != NULL); |
10450 | gold_assert(os->needs_symtab_index()); | |
7404fe1b | 10451 | r_sym = os->symtab_index(); |
cf43a2fe AM |
10452 | } |
10453 | break; | |
10454 | ||
10455 | default: | |
10456 | gold_unreachable(); | |
10457 | } | |
10458 | } | |
10459 | else | |
10460 | { | |
7404fe1b | 10461 | gsym = object->global_symbol(r_sym); |
cf43a2fe AM |
10462 | gold_assert(gsym != NULL); |
10463 | if (gsym->is_forwarder()) | |
10464 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
10465 | ||
10466 | gold_assert(gsym->has_symtab_index()); | |
7404fe1b | 10467 | r_sym = gsym->symtab_index(); |
cf43a2fe AM |
10468 | } |
10469 | ||
10470 | // Get the new offset--the location in the output section where | |
10471 | // this relocation should be applied. | |
cf43a2fe | 10472 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 10473 | offset += offset_in_output_section; |
cf43a2fe AM |
10474 | else |
10475 | { | |
c9269dff AM |
10476 | section_offset_type sot_offset = |
10477 | convert_types<section_offset_type, Address>(offset); | |
cf43a2fe | 10478 | section_offset_type new_sot_offset = |
c9269dff AM |
10479 | output_section->output_offset(object, relinfo->data_shndx, |
10480 | sot_offset); | |
cf43a2fe | 10481 | gold_assert(new_sot_offset != -1); |
7404fe1b | 10482 | offset = new_sot_offset; |
cf43a2fe AM |
10483 | } |
10484 | ||
dd93cd0a AM |
10485 | // In an object file, r_offset is an offset within the section. |
10486 | // In an executable or dynamic object, generated by | |
10487 | // --emit-relocs, r_offset is an absolute address. | |
033bfb73 | 10488 | if (!relocatable) |
dd93cd0a | 10489 | { |
7404fe1b | 10490 | offset += view_address; |
dd93cd0a | 10491 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
7404fe1b | 10492 | offset -= offset_in_output_section; |
dd93cd0a AM |
10493 | } |
10494 | ||
cf43a2fe | 10495 | // Handle the reloc addend based on the strategy. |
cf43a2fe AM |
10496 | if (strategy == Relocatable_relocs::RELOC_COPY) |
10497 | ; | |
10498 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) | |
10499 | { | |
7404fe1b | 10500 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
033bfb73 CC |
10501 | addend = psymval->value(object, addend); |
10502 | // In a relocatable link, the symbol value is relative to | |
10503 | // the start of the output section. For a non-relocatable | |
10504 | // link, we need to adjust the addend. | |
10505 | if (!relocatable) | |
10506 | { | |
10507 | gold_assert(os != NULL); | |
10508 | addend -= os->address(); | |
10509 | } | |
cf43a2fe AM |
10510 | } |
10511 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) | |
10512 | { | |
e3a7574e AM |
10513 | if (size == 32) |
10514 | { | |
10515 | if (addend >= 32768) | |
10516 | addend += got2_addend; | |
10517 | } | |
10518 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) | |
10519 | { | |
10520 | r_type = elfcpp::R_POWERPC_ADDR16_HA; | |
dcfc7dd4 | 10521 | addend -= d_offset; |
e3a7574e AM |
10522 | } |
10523 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) | |
10524 | { | |
10525 | r_type = elfcpp::R_POWERPC_ADDR16_LO; | |
dcfc7dd4 | 10526 | addend -= d_offset + 4; |
e3a7574e | 10527 | } |
cf43a2fe AM |
10528 | } |
10529 | else | |
10530 | gold_unreachable(); | |
10531 | ||
033bfb73 | 10532 | if (!relocatable) |
7404fe1b AM |
10533 | { |
10534 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
10535 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO | |
10536 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI | |
10537 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) | |
10538 | { | |
10539 | // First instruction of a global dynamic sequence, | |
10540 | // arg setup insn. | |
10541 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10542 | switch (this->optimize_tls_gd(final)) | |
10543 | { | |
10544 | case tls::TLSOPT_TO_IE: | |
10545 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 | |
10546 | - elfcpp::R_POWERPC_GOT_TLSGD16); | |
10547 | break; | |
10548 | case tls::TLSOPT_TO_LE: | |
10549 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 | |
10550 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) | |
10551 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10552 | else | |
10553 | { | |
10554 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10555 | offset -= d_offset; |
7404fe1b AM |
10556 | } |
10557 | break; | |
10558 | default: | |
10559 | break; | |
10560 | } | |
10561 | } | |
10562 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
10563 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO | |
10564 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI | |
10565 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) | |
10566 | { | |
10567 | // First instruction of a local dynamic sequence, | |
10568 | // arg setup insn. | |
10569 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
10570 | { | |
10571 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 | |
10572 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) | |
10573 | { | |
10574 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10575 | const Output_section* os = relinfo->layout->tls_segment() | |
10576 | ->first_section(); | |
10577 | gold_assert(os != NULL); | |
10578 | gold_assert(os->needs_symtab_index()); | |
10579 | r_sym = os->symtab_index(); | |
10580 | addend = dtp_offset; | |
10581 | } | |
10582 | else | |
10583 | { | |
10584 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10585 | offset -= d_offset; |
7404fe1b AM |
10586 | } |
10587 | } | |
10588 | } | |
10589 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
10590 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO | |
10591 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI | |
10592 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) | |
10593 | { | |
10594 | // First instruction of initial exec sequence. | |
10595 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10596 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
10597 | { | |
10598 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 | |
10599 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) | |
10600 | r_type = elfcpp::R_POWERPC_TPREL16_HA; | |
10601 | else | |
10602 | { | |
10603 | r_type = elfcpp::R_POWERPC_NONE; | |
dcfc7dd4 | 10604 | offset -= d_offset; |
7404fe1b AM |
10605 | } |
10606 | } | |
10607 | } | |
10608 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) | |
10609 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) | |
10610 | { | |
10611 | // Second instruction of a global dynamic sequence, | |
10612 | // the __tls_get_addr call | |
10613 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10614 | switch (this->optimize_tls_gd(final)) | |
10615 | { | |
10616 | case tls::TLSOPT_TO_IE: | |
10617 | r_type = elfcpp::R_POWERPC_NONE; | |
10618 | zap_next = true; | |
10619 | break; | |
10620 | case tls::TLSOPT_TO_LE: | |
10621 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10622 | offset += d_offset; |
7404fe1b AM |
10623 | zap_next = true; |
10624 | break; | |
10625 | default: | |
10626 | break; | |
10627 | } | |
10628 | } | |
10629 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) | |
10630 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) | |
10631 | { | |
10632 | // Second instruction of a local dynamic sequence, | |
10633 | // the __tls_get_addr call | |
10634 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) | |
10635 | { | |
10636 | const Output_section* os = relinfo->layout->tls_segment() | |
10637 | ->first_section(); | |
10638 | gold_assert(os != NULL); | |
10639 | gold_assert(os->needs_symtab_index()); | |
10640 | r_sym = os->symtab_index(); | |
10641 | addend = dtp_offset; | |
10642 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10643 | offset += d_offset; |
7404fe1b AM |
10644 | zap_next = true; |
10645 | } | |
10646 | } | |
10647 | else if (r_type == elfcpp::R_POWERPC_TLS) | |
10648 | { | |
10649 | // Second instruction of an initial exec sequence | |
10650 | const bool final = gsym == NULL || gsym->final_value_is_known(); | |
10651 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) | |
10652 | { | |
10653 | r_type = elfcpp::R_POWERPC_TPREL16_LO; | |
dcfc7dd4 | 10654 | offset += d_offset; |
7404fe1b AM |
10655 | } |
10656 | } | |
10657 | } | |
10658 | ||
10659 | reloc_write.put_r_offset(offset); | |
10660 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); | |
10661 | reloc_write.put_r_addend(addend); | |
cf43a2fe AM |
10662 | |
10663 | pwrite += reloc_size; | |
10664 | } | |
10665 | ||
10666 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
10667 | == reloc_view_size); | |
42cacb20 DE |
10668 | } |
10669 | ||
ec661b9d | 10670 | // Return the value to use for a dynamic symbol which requires special |
42cacb20 DE |
10671 | // treatment. This is how we support equality comparisons of function |
10672 | // pointers across shared library boundaries, as described in the | |
10673 | // processor specific ABI supplement. | |
10674 | ||
10675 | template<int size, bool big_endian> | |
10676 | uint64_t | |
10677 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
10678 | { | |
cf43a2fe AM |
10679 | if (size == 32) |
10680 | { | |
10681 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
ec661b9d AM |
10682 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10683 | p != this->stub_tables_.end(); | |
10684 | ++p) | |
10685 | { | |
7e57d19e AM |
10686 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10687 | = (*p)->find_plt_call_entry(gsym); | |
10688 | if (ent != NULL) | |
10689 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10690 | } |
c9824451 | 10691 | } |
9055360d AM |
10692 | else if (this->abiversion() >= 2) |
10693 | { | |
faa2211d AM |
10694 | Address off = this->glink_section()->find_global_entry(gsym); |
10695 | if (off != invalid_address) | |
9055360d AM |
10696 | return this->glink_section()->global_entry_address() + off; |
10697 | } | |
ec661b9d | 10698 | gold_unreachable(); |
c9824451 AM |
10699 | } |
10700 | ||
10701 | // Return the PLT address to use for a local symbol. | |
10702 | template<int size, bool big_endian> | |
10703 | uint64_t | |
10704 | Target_powerpc<size, big_endian>::do_plt_address_for_local( | |
10705 | const Relobj* object, | |
10706 | unsigned int symndx) const | |
10707 | { | |
10708 | if (size == 32) | |
10709 | { | |
10710 | const Sized_relobj<size, big_endian>* relobj | |
10711 | = static_cast<const Sized_relobj<size, big_endian>*>(object); | |
ec661b9d AM |
10712 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10713 | p != this->stub_tables_.end(); | |
10714 | ++p) | |
10715 | { | |
7e57d19e AM |
10716 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10717 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); | |
10718 | if (ent != NULL) | |
10719 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10720 | } |
c9824451 | 10721 | } |
ec661b9d | 10722 | gold_unreachable(); |
c9824451 AM |
10723 | } |
10724 | ||
10725 | // Return the PLT address to use for a global symbol. | |
10726 | template<int size, bool big_endian> | |
10727 | uint64_t | |
10728 | Target_powerpc<size, big_endian>::do_plt_address_for_global( | |
10729 | const Symbol* gsym) const | |
10730 | { | |
10731 | if (size == 32) | |
10732 | { | |
ec661b9d AM |
10733 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
10734 | p != this->stub_tables_.end(); | |
10735 | ++p) | |
10736 | { | |
7e57d19e AM |
10737 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
10738 | = (*p)->find_plt_call_entry(gsym); | |
10739 | if (ent != NULL) | |
10740 | return (*p)->stub_address() + ent->off_; | |
ec661b9d | 10741 | } |
cf43a2fe | 10742 | } |
9055360d AM |
10743 | else if (this->abiversion() >= 2) |
10744 | { | |
faa2211d AM |
10745 | Address off = this->glink_section()->find_global_entry(gsym); |
10746 | if (off != invalid_address) | |
9055360d AM |
10747 | return this->glink_section()->global_entry_address() + off; |
10748 | } | |
ec661b9d | 10749 | gold_unreachable(); |
42cacb20 DE |
10750 | } |
10751 | ||
bd73a62d AM |
10752 | // Return the offset to use for the GOT_INDX'th got entry which is |
10753 | // for a local tls symbol specified by OBJECT, SYMNDX. | |
10754 | template<int size, bool big_endian> | |
10755 | int64_t | |
10756 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( | |
10757 | const Relobj* object, | |
10758 | unsigned int symndx, | |
10759 | unsigned int got_indx) const | |
10760 | { | |
10761 | const Powerpc_relobj<size, big_endian>* ppc_object | |
10762 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); | |
10763 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) | |
10764 | { | |
10765 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10766 | got_type <= GOT_TYPE_TPREL; | |
10767 | got_type = Got_type(got_type + 1)) | |
10768 | if (ppc_object->local_has_got_offset(symndx, got_type)) | |
10769 | { | |
10770 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); | |
10771 | if (got_type == GOT_TYPE_TLSGD) | |
10772 | off += size / 8; | |
10773 | if (off == got_indx * (size / 8)) | |
10774 | { | |
10775 | if (got_type == GOT_TYPE_TPREL) | |
10776 | return -tp_offset; | |
10777 | else | |
10778 | return -dtp_offset; | |
10779 | } | |
10780 | } | |
10781 | } | |
10782 | gold_unreachable(); | |
10783 | } | |
10784 | ||
10785 | // Return the offset to use for the GOT_INDX'th got entry which is | |
10786 | // for global tls symbol GSYM. | |
10787 | template<int size, bool big_endian> | |
10788 | int64_t | |
10789 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( | |
10790 | Symbol* gsym, | |
10791 | unsigned int got_indx) const | |
10792 | { | |
10793 | if (gsym->type() == elfcpp::STT_TLS) | |
10794 | { | |
10795 | for (Got_type got_type = GOT_TYPE_TLSGD; | |
10796 | got_type <= GOT_TYPE_TPREL; | |
10797 | got_type = Got_type(got_type + 1)) | |
10798 | if (gsym->has_got_offset(got_type)) | |
10799 | { | |
10800 | unsigned int off = gsym->got_offset(got_type); | |
10801 | if (got_type == GOT_TYPE_TLSGD) | |
10802 | off += size / 8; | |
10803 | if (off == got_indx * (size / 8)) | |
10804 | { | |
10805 | if (got_type == GOT_TYPE_TPREL) | |
10806 | return -tp_offset; | |
10807 | else | |
10808 | return -dtp_offset; | |
10809 | } | |
10810 | } | |
10811 | } | |
10812 | gold_unreachable(); | |
10813 | } | |
10814 | ||
42cacb20 DE |
10815 | // The selector for powerpc object files. |
10816 | ||
10817 | template<int size, bool big_endian> | |
10818 | class Target_selector_powerpc : public Target_selector | |
10819 | { | |
10820 | public: | |
10821 | Target_selector_powerpc() | |
edc27beb AM |
10822 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
10823 | size, big_endian, | |
03ef7571 ILT |
10824 | (size == 64 |
10825 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") | |
10826 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), | |
10827 | (size == 64 | |
10828 | ? (big_endian ? "elf64ppc" : "elf64lppc") | |
10829 | : (big_endian ? "elf32ppc" : "elf32lppc"))) | |
42cacb20 DE |
10830 | { } |
10831 | ||
2e702c99 RM |
10832 | virtual Target* |
10833 | do_instantiate_target() | |
7f055c20 | 10834 | { return new Target_powerpc<size, big_endian>(); } |
42cacb20 DE |
10835 | }; |
10836 | ||
10837 | Target_selector_powerpc<32, true> target_selector_ppc32; | |
10838 | Target_selector_powerpc<32, false> target_selector_ppc32le; | |
10839 | Target_selector_powerpc<64, true> target_selector_ppc64; | |
10840 | Target_selector_powerpc<64, false> target_selector_ppc64le; | |
10841 | ||
decdd3bc AM |
10842 | // Instantiate these constants for -O0 |
10843 | template<int size, bool big_endian> | |
9055360d AM |
10844 | const typename Output_data_glink<size, big_endian>::Address |
10845 | Output_data_glink<size, big_endian>::invalid_address; | |
10846 | template<int size, bool big_endian> | |
decdd3bc AM |
10847 | const typename Stub_table<size, big_endian>::Address |
10848 | Stub_table<size, big_endian>::invalid_address; | |
10849 | template<int size, bool big_endian> | |
10850 | const typename Target_powerpc<size, big_endian>::Address | |
10851 | Target_powerpc<size, big_endian>::invalid_address; | |
10852 | ||
42cacb20 | 10853 | } // End anonymous namespace. |